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1// SPDX-License-Identifier: GPL-2.0
2/* Copyright(c) 1999 - 2018 Intel Corporation. */
3
4#include "e1000.h"
5#include <linux/ethtool.h>
6
7static s32 e1000_wait_autoneg(struct e1000_hw *hw);
8static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
9 u16 *data, bool read, bool page_set);
10static u32 e1000_get_phy_addr_for_hv_page(u32 page);
11static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
12 u16 *data, bool read);
13
14/* Cable length tables */
15static const u16 e1000_m88_cable_length_table[] = {
16 0, 50, 80, 110, 140, 140, E1000_CABLE_LENGTH_UNDEFINED
17};
18
19#define M88E1000_CABLE_LENGTH_TABLE_SIZE \
20 ARRAY_SIZE(e1000_m88_cable_length_table)
21
22static const u16 e1000_igp_2_cable_length_table[] = {
23 0, 0, 0, 0, 0, 0, 0, 0, 3, 5, 8, 11, 13, 16, 18, 21, 0, 0, 0, 3,
24 6, 10, 13, 16, 19, 23, 26, 29, 32, 35, 38, 41, 6, 10, 14, 18, 22,
25 26, 30, 33, 37, 41, 44, 48, 51, 54, 58, 61, 21, 26, 31, 35, 40,
26 44, 49, 53, 57, 61, 65, 68, 72, 75, 79, 82, 40, 45, 51, 56, 61,
27 66, 70, 75, 79, 83, 87, 91, 94, 98, 101, 104, 60, 66, 72, 77, 82,
28 87, 92, 96, 100, 104, 108, 111, 114, 117, 119, 121, 83, 89, 95,
29 100, 105, 109, 113, 116, 119, 122, 124, 104, 109, 114, 118, 121,
30 124
31};
32
33#define IGP02E1000_CABLE_LENGTH_TABLE_SIZE \
34 ARRAY_SIZE(e1000_igp_2_cable_length_table)
35
36/**
37 * e1000e_check_reset_block_generic - Check if PHY reset is blocked
38 * @hw: pointer to the HW structure
39 *
40 * Read the PHY management control register and check whether a PHY reset
41 * is blocked. If a reset is not blocked return 0, otherwise
42 * return E1000_BLK_PHY_RESET (12).
43 **/
44s32 e1000e_check_reset_block_generic(struct e1000_hw *hw)
45{
46 u32 manc;
47
48 manc = er32(MANC);
49
50 return (manc & E1000_MANC_BLK_PHY_RST_ON_IDE) ? E1000_BLK_PHY_RESET : 0;
51}
52
53/**
54 * e1000e_get_phy_id - Retrieve the PHY ID and revision
55 * @hw: pointer to the HW structure
56 *
57 * Reads the PHY registers and stores the PHY ID and possibly the PHY
58 * revision in the hardware structure.
59 **/
60s32 e1000e_get_phy_id(struct e1000_hw *hw)
61{
62 struct e1000_phy_info *phy = &hw->phy;
63 s32 ret_val = 0;
64 u16 phy_id;
65 u16 retry_count = 0;
66
67 if (!phy->ops.read_reg)
68 return 0;
69
70 while (retry_count < 2) {
71 ret_val = e1e_rphy(hw, MII_PHYSID1, &phy_id);
72 if (ret_val)
73 return ret_val;
74
75 phy->id = (u32)(phy_id << 16);
76 usleep_range(20, 40);
77 ret_val = e1e_rphy(hw, MII_PHYSID2, &phy_id);
78 if (ret_val)
79 return ret_val;
80
81 phy->id |= (u32)(phy_id & PHY_REVISION_MASK);
82 phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);
83
84 if (phy->id != 0 && phy->id != PHY_REVISION_MASK)
85 return 0;
86
87 retry_count++;
88 }
89
90 return 0;
91}
92
93/**
94 * e1000e_phy_reset_dsp - Reset PHY DSP
95 * @hw: pointer to the HW structure
96 *
97 * Reset the digital signal processor.
98 **/
99s32 e1000e_phy_reset_dsp(struct e1000_hw *hw)
100{
101 s32 ret_val;
102
103 ret_val = e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0xC1);
104 if (ret_val)
105 return ret_val;
106
107 return e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0);
108}
109
110void e1000e_disable_phy_retry(struct e1000_hw *hw)
111{
112 hw->phy.retry_enabled = false;
113}
114
115void e1000e_enable_phy_retry(struct e1000_hw *hw)
116{
117 hw->phy.retry_enabled = true;
118}
119
120/**
121 * e1000e_read_phy_reg_mdic - Read MDI control register
122 * @hw: pointer to the HW structure
123 * @offset: register offset to be read
124 * @data: pointer to the read data
125 *
126 * Reads the MDI control register in the PHY at offset and stores the
127 * information read to data.
128 **/
129s32 e1000e_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data)
130{
131 u32 i, mdic = 0, retry_counter, retry_max;
132 struct e1000_phy_info *phy = &hw->phy;
133 bool success;
134
135 if (offset > MAX_PHY_REG_ADDRESS) {
136 e_dbg("PHY Address %d is out of range\n", offset);
137 return -E1000_ERR_PARAM;
138 }
139
140 retry_max = phy->retry_enabled ? phy->retry_count : 0;
141
142 /* Set up Op-code, Phy Address, and register offset in the MDI
143 * Control register. The MAC will take care of interfacing with the
144 * PHY to retrieve the desired data.
145 */
146 for (retry_counter = 0; retry_counter <= retry_max; retry_counter++) {
147 success = true;
148
149 mdic = ((offset << E1000_MDIC_REG_SHIFT) |
150 (phy->addr << E1000_MDIC_PHY_SHIFT) |
151 (E1000_MDIC_OP_READ));
152
153 ew32(MDIC, mdic);
154
155 /* Poll the ready bit to see if the MDI read completed
156 * Increasing the time out as testing showed failures with
157 * the lower time out
158 */
159 for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
160 udelay(50);
161 mdic = er32(MDIC);
162 if (mdic & E1000_MDIC_READY)
163 break;
164 }
165 if (!(mdic & E1000_MDIC_READY)) {
166 e_dbg("MDI Read PHY Reg Address %d did not complete\n",
167 offset);
168 success = false;
169 }
170 if (mdic & E1000_MDIC_ERROR) {
171 e_dbg("MDI Read PHY Reg Address %d Error\n", offset);
172 success = false;
173 }
174 if (FIELD_GET(E1000_MDIC_REG_MASK, mdic) != offset) {
175 e_dbg("MDI Read offset error - requested %d, returned %d\n",
176 offset, FIELD_GET(E1000_MDIC_REG_MASK, mdic));
177 success = false;
178 }
179
180 /* Allow some time after each MDIC transaction to avoid
181 * reading duplicate data in the next MDIC transaction.
182 */
183 if (hw->mac.type == e1000_pch2lan)
184 udelay(100);
185
186 if (success) {
187 *data = (u16)mdic;
188 return 0;
189 }
190
191 if (retry_counter != retry_max) {
192 e_dbg("Perform retry on PHY transaction...\n");
193 mdelay(10);
194 }
195 }
196
197 return -E1000_ERR_PHY;
198}
199
200/**
201 * e1000e_write_phy_reg_mdic - Write MDI control register
202 * @hw: pointer to the HW structure
203 * @offset: register offset to write to
204 * @data: data to write to register at offset
205 *
206 * Writes data to MDI control register in the PHY at offset.
207 **/
208s32 e1000e_write_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 data)
209{
210 u32 i, mdic = 0, retry_counter, retry_max;
211 struct e1000_phy_info *phy = &hw->phy;
212 bool success;
213
214 if (offset > MAX_PHY_REG_ADDRESS) {
215 e_dbg("PHY Address %d is out of range\n", offset);
216 return -E1000_ERR_PARAM;
217 }
218
219 retry_max = phy->retry_enabled ? phy->retry_count : 0;
220
221 /* Set up Op-code, Phy Address, and register offset in the MDI
222 * Control register. The MAC will take care of interfacing with the
223 * PHY to retrieve the desired data.
224 */
225 for (retry_counter = 0; retry_counter <= retry_max; retry_counter++) {
226 success = true;
227
228 mdic = (((u32)data) |
229 (offset << E1000_MDIC_REG_SHIFT) |
230 (phy->addr << E1000_MDIC_PHY_SHIFT) |
231 (E1000_MDIC_OP_WRITE));
232
233 ew32(MDIC, mdic);
234
235 /* Poll the ready bit to see if the MDI read completed
236 * Increasing the time out as testing showed failures with
237 * the lower time out
238 */
239 for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
240 udelay(50);
241 mdic = er32(MDIC);
242 if (mdic & E1000_MDIC_READY)
243 break;
244 }
245 if (!(mdic & E1000_MDIC_READY)) {
246 e_dbg("MDI Write PHY Reg Address %d did not complete\n",
247 offset);
248 success = false;
249 }
250 if (mdic & E1000_MDIC_ERROR) {
251 e_dbg("MDI Write PHY Reg Address %d Error\n", offset);
252 success = false;
253 }
254 if (FIELD_GET(E1000_MDIC_REG_MASK, mdic) != offset) {
255 e_dbg("MDI Write offset error - requested %d, returned %d\n",
256 offset, FIELD_GET(E1000_MDIC_REG_MASK, mdic));
257 success = false;
258 }
259
260 /* Allow some time after each MDIC transaction to avoid
261 * reading duplicate data in the next MDIC transaction.
262 */
263 if (hw->mac.type == e1000_pch2lan)
264 udelay(100);
265
266 if (success)
267 return 0;
268
269 if (retry_counter != retry_max) {
270 e_dbg("Perform retry on PHY transaction...\n");
271 mdelay(10);
272 }
273 }
274
275 return -E1000_ERR_PHY;
276}
277
278/**
279 * e1000e_read_phy_reg_m88 - Read m88 PHY register
280 * @hw: pointer to the HW structure
281 * @offset: register offset to be read
282 * @data: pointer to the read data
283 *
284 * Acquires semaphore, if necessary, then reads the PHY register at offset
285 * and storing the retrieved information in data. Release any acquired
286 * semaphores before exiting.
287 **/
288s32 e1000e_read_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 *data)
289{
290 s32 ret_val;
291
292 ret_val = hw->phy.ops.acquire(hw);
293 if (ret_val)
294 return ret_val;
295
296 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
297 data);
298
299 hw->phy.ops.release(hw);
300
301 return ret_val;
302}
303
304/**
305 * e1000e_write_phy_reg_m88 - Write m88 PHY register
306 * @hw: pointer to the HW structure
307 * @offset: register offset to write to
308 * @data: data to write at register offset
309 *
310 * Acquires semaphore, if necessary, then writes the data to PHY register
311 * at the offset. Release any acquired semaphores before exiting.
312 **/
313s32 e1000e_write_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 data)
314{
315 s32 ret_val;
316
317 ret_val = hw->phy.ops.acquire(hw);
318 if (ret_val)
319 return ret_val;
320
321 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
322 data);
323
324 hw->phy.ops.release(hw);
325
326 return ret_val;
327}
328
329/**
330 * e1000_set_page_igp - Set page as on IGP-like PHY(s)
331 * @hw: pointer to the HW structure
332 * @page: page to set (shifted left when necessary)
333 *
334 * Sets PHY page required for PHY register access. Assumes semaphore is
335 * already acquired. Note, this function sets phy.addr to 1 so the caller
336 * must set it appropriately (if necessary) after this function returns.
337 **/
338s32 e1000_set_page_igp(struct e1000_hw *hw, u16 page)
339{
340 e_dbg("Setting page 0x%x\n", page);
341
342 hw->phy.addr = 1;
343
344 return e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, page);
345}
346
347/**
348 * __e1000e_read_phy_reg_igp - Read igp PHY register
349 * @hw: pointer to the HW structure
350 * @offset: register offset to be read
351 * @data: pointer to the read data
352 * @locked: semaphore has already been acquired or not
353 *
354 * Acquires semaphore, if necessary, then reads the PHY register at offset
355 * and stores the retrieved information in data. Release any acquired
356 * semaphores before exiting.
357 **/
358static s32 __e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data,
359 bool locked)
360{
361 s32 ret_val = 0;
362
363 if (!locked) {
364 if (!hw->phy.ops.acquire)
365 return 0;
366
367 ret_val = hw->phy.ops.acquire(hw);
368 if (ret_val)
369 return ret_val;
370 }
371
372 if (offset > MAX_PHY_MULTI_PAGE_REG)
373 ret_val = e1000e_write_phy_reg_mdic(hw,
374 IGP01E1000_PHY_PAGE_SELECT,
375 (u16)offset);
376 if (!ret_val)
377 ret_val = e1000e_read_phy_reg_mdic(hw,
378 MAX_PHY_REG_ADDRESS & offset,
379 data);
380 if (!locked)
381 hw->phy.ops.release(hw);
382
383 return ret_val;
384}
385
386/**
387 * e1000e_read_phy_reg_igp - Read igp PHY register
388 * @hw: pointer to the HW structure
389 * @offset: register offset to be read
390 * @data: pointer to the read data
391 *
392 * Acquires semaphore then reads the PHY register at offset and stores the
393 * retrieved information in data.
394 * Release the acquired semaphore before exiting.
395 **/
396s32 e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data)
397{
398 return __e1000e_read_phy_reg_igp(hw, offset, data, false);
399}
400
401/**
402 * e1000e_read_phy_reg_igp_locked - Read igp PHY register
403 * @hw: pointer to the HW structure
404 * @offset: register offset to be read
405 * @data: pointer to the read data
406 *
407 * Reads the PHY register at offset and stores the retrieved information
408 * in data. Assumes semaphore already acquired.
409 **/
410s32 e1000e_read_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 *data)
411{
412 return __e1000e_read_phy_reg_igp(hw, offset, data, true);
413}
414
415/**
416 * __e1000e_write_phy_reg_igp - Write igp PHY register
417 * @hw: pointer to the HW structure
418 * @offset: register offset to write to
419 * @data: data to write at register offset
420 * @locked: semaphore has already been acquired or not
421 *
422 * Acquires semaphore, if necessary, then writes the data to PHY register
423 * at the offset. Release any acquired semaphores before exiting.
424 **/
425static s32 __e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data,
426 bool locked)
427{
428 s32 ret_val = 0;
429
430 if (!locked) {
431 if (!hw->phy.ops.acquire)
432 return 0;
433
434 ret_val = hw->phy.ops.acquire(hw);
435 if (ret_val)
436 return ret_val;
437 }
438
439 if (offset > MAX_PHY_MULTI_PAGE_REG)
440 ret_val = e1000e_write_phy_reg_mdic(hw,
441 IGP01E1000_PHY_PAGE_SELECT,
442 (u16)offset);
443 if (!ret_val)
444 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS &
445 offset, data);
446 if (!locked)
447 hw->phy.ops.release(hw);
448
449 return ret_val;
450}
451
452/**
453 * e1000e_write_phy_reg_igp - Write igp PHY register
454 * @hw: pointer to the HW structure
455 * @offset: register offset to write to
456 * @data: data to write at register offset
457 *
458 * Acquires semaphore then writes the data to PHY register
459 * at the offset. Release any acquired semaphores before exiting.
460 **/
461s32 e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data)
462{
463 return __e1000e_write_phy_reg_igp(hw, offset, data, false);
464}
465
466/**
467 * e1000e_write_phy_reg_igp_locked - Write igp PHY register
468 * @hw: pointer to the HW structure
469 * @offset: register offset to write to
470 * @data: data to write at register offset
471 *
472 * Writes the data to PHY register at the offset.
473 * Assumes semaphore already acquired.
474 **/
475s32 e1000e_write_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 data)
476{
477 return __e1000e_write_phy_reg_igp(hw, offset, data, true);
478}
479
480/**
481 * __e1000_read_kmrn_reg - Read kumeran register
482 * @hw: pointer to the HW structure
483 * @offset: register offset to be read
484 * @data: pointer to the read data
485 * @locked: semaphore has already been acquired or not
486 *
487 * Acquires semaphore, if necessary. Then reads the PHY register at offset
488 * using the kumeran interface. The information retrieved is stored in data.
489 * Release any acquired semaphores before exiting.
490 **/
491static s32 __e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data,
492 bool locked)
493{
494 u32 kmrnctrlsta;
495
496 if (!locked) {
497 s32 ret_val = 0;
498
499 if (!hw->phy.ops.acquire)
500 return 0;
501
502 ret_val = hw->phy.ops.acquire(hw);
503 if (ret_val)
504 return ret_val;
505 }
506
507 kmrnctrlsta = FIELD_PREP(E1000_KMRNCTRLSTA_OFFSET, offset) |
508 E1000_KMRNCTRLSTA_REN;
509 ew32(KMRNCTRLSTA, kmrnctrlsta);
510 e1e_flush();
511
512 udelay(2);
513
514 kmrnctrlsta = er32(KMRNCTRLSTA);
515 *data = (u16)kmrnctrlsta;
516
517 if (!locked)
518 hw->phy.ops.release(hw);
519
520 return 0;
521}
522
523/**
524 * e1000e_read_kmrn_reg - Read kumeran register
525 * @hw: pointer to the HW structure
526 * @offset: register offset to be read
527 * @data: pointer to the read data
528 *
529 * Acquires semaphore then reads the PHY register at offset using the
530 * kumeran interface. The information retrieved is stored in data.
531 * Release the acquired semaphore before exiting.
532 **/
533s32 e1000e_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data)
534{
535 return __e1000_read_kmrn_reg(hw, offset, data, false);
536}
537
538/**
539 * e1000e_read_kmrn_reg_locked - Read kumeran register
540 * @hw: pointer to the HW structure
541 * @offset: register offset to be read
542 * @data: pointer to the read data
543 *
544 * Reads the PHY register at offset using the kumeran interface. The
545 * information retrieved is stored in data.
546 * Assumes semaphore already acquired.
547 **/
548s32 e1000e_read_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 *data)
549{
550 return __e1000_read_kmrn_reg(hw, offset, data, true);
551}
552
553/**
554 * __e1000_write_kmrn_reg - Write kumeran register
555 * @hw: pointer to the HW structure
556 * @offset: register offset to write to
557 * @data: data to write at register offset
558 * @locked: semaphore has already been acquired or not
559 *
560 * Acquires semaphore, if necessary. Then write the data to PHY register
561 * at the offset using the kumeran interface. Release any acquired semaphores
562 * before exiting.
563 **/
564static s32 __e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data,
565 bool locked)
566{
567 u32 kmrnctrlsta;
568
569 if (!locked) {
570 s32 ret_val = 0;
571
572 if (!hw->phy.ops.acquire)
573 return 0;
574
575 ret_val = hw->phy.ops.acquire(hw);
576 if (ret_val)
577 return ret_val;
578 }
579
580 kmrnctrlsta = FIELD_PREP(E1000_KMRNCTRLSTA_OFFSET, offset) | data;
581 ew32(KMRNCTRLSTA, kmrnctrlsta);
582 e1e_flush();
583
584 udelay(2);
585
586 if (!locked)
587 hw->phy.ops.release(hw);
588
589 return 0;
590}
591
592/**
593 * e1000e_write_kmrn_reg - Write kumeran register
594 * @hw: pointer to the HW structure
595 * @offset: register offset to write to
596 * @data: data to write at register offset
597 *
598 * Acquires semaphore then writes the data to the PHY register at the offset
599 * using the kumeran interface. Release the acquired semaphore before exiting.
600 **/
601s32 e1000e_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data)
602{
603 return __e1000_write_kmrn_reg(hw, offset, data, false);
604}
605
606/**
607 * e1000e_write_kmrn_reg_locked - Write kumeran register
608 * @hw: pointer to the HW structure
609 * @offset: register offset to write to
610 * @data: data to write at register offset
611 *
612 * Write the data to PHY register at the offset using the kumeran interface.
613 * Assumes semaphore already acquired.
614 **/
615s32 e1000e_write_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 data)
616{
617 return __e1000_write_kmrn_reg(hw, offset, data, true);
618}
619
620/**
621 * e1000_set_master_slave_mode - Setup PHY for Master/slave mode
622 * @hw: pointer to the HW structure
623 *
624 * Sets up Master/slave mode
625 **/
626static s32 e1000_set_master_slave_mode(struct e1000_hw *hw)
627{
628 s32 ret_val;
629 u16 phy_data;
630
631 /* Resolve Master/Slave mode */
632 ret_val = e1e_rphy(hw, MII_CTRL1000, &phy_data);
633 if (ret_val)
634 return ret_val;
635
636 /* load defaults for future use */
637 hw->phy.original_ms_type = (phy_data & CTL1000_ENABLE_MASTER) ?
638 ((phy_data & CTL1000_AS_MASTER) ?
639 e1000_ms_force_master : e1000_ms_force_slave) : e1000_ms_auto;
640
641 switch (hw->phy.ms_type) {
642 case e1000_ms_force_master:
643 phy_data |= (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER);
644 break;
645 case e1000_ms_force_slave:
646 phy_data |= CTL1000_ENABLE_MASTER;
647 phy_data &= ~(CTL1000_AS_MASTER);
648 break;
649 case e1000_ms_auto:
650 phy_data &= ~CTL1000_ENABLE_MASTER;
651 fallthrough;
652 default:
653 break;
654 }
655
656 return e1e_wphy(hw, MII_CTRL1000, phy_data);
657}
658
659/**
660 * e1000_copper_link_setup_82577 - Setup 82577 PHY for copper link
661 * @hw: pointer to the HW structure
662 *
663 * Sets up Carrier-sense on Transmit and downshift values.
664 **/
665s32 e1000_copper_link_setup_82577(struct e1000_hw *hw)
666{
667 s32 ret_val;
668 u16 phy_data;
669
670 /* Enable CRS on Tx. This must be set for half-duplex operation. */
671 ret_val = e1e_rphy(hw, I82577_CFG_REG, &phy_data);
672 if (ret_val)
673 return ret_val;
674
675 phy_data |= I82577_CFG_ASSERT_CRS_ON_TX;
676
677 /* Enable downshift */
678 phy_data |= I82577_CFG_ENABLE_DOWNSHIFT;
679
680 ret_val = e1e_wphy(hw, I82577_CFG_REG, phy_data);
681 if (ret_val)
682 return ret_val;
683
684 /* Set MDI/MDIX mode */
685 ret_val = e1e_rphy(hw, I82577_PHY_CTRL_2, &phy_data);
686 if (ret_val)
687 return ret_val;
688 phy_data &= ~I82577_PHY_CTRL2_MDIX_CFG_MASK;
689 /* Options:
690 * 0 - Auto (default)
691 * 1 - MDI mode
692 * 2 - MDI-X mode
693 */
694 switch (hw->phy.mdix) {
695 case 1:
696 break;
697 case 2:
698 phy_data |= I82577_PHY_CTRL2_MANUAL_MDIX;
699 break;
700 case 0:
701 default:
702 phy_data |= I82577_PHY_CTRL2_AUTO_MDI_MDIX;
703 break;
704 }
705 ret_val = e1e_wphy(hw, I82577_PHY_CTRL_2, phy_data);
706 if (ret_val)
707 return ret_val;
708
709 return e1000_set_master_slave_mode(hw);
710}
711
712/**
713 * e1000e_copper_link_setup_m88 - Setup m88 PHY's for copper link
714 * @hw: pointer to the HW structure
715 *
716 * Sets up MDI/MDI-X and polarity for m88 PHY's. If necessary, transmit clock
717 * and downshift values are set also.
718 **/
719s32 e1000e_copper_link_setup_m88(struct e1000_hw *hw)
720{
721 struct e1000_phy_info *phy = &hw->phy;
722 s32 ret_val;
723 u16 phy_data;
724
725 /* Enable CRS on Tx. This must be set for half-duplex operation. */
726 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
727 if (ret_val)
728 return ret_val;
729
730 /* For BM PHY this bit is downshift enable */
731 if (phy->type != e1000_phy_bm)
732 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
733
734 /* Options:
735 * MDI/MDI-X = 0 (default)
736 * 0 - Auto for all speeds
737 * 1 - MDI mode
738 * 2 - MDI-X mode
739 * 3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes)
740 */
741 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
742
743 switch (phy->mdix) {
744 case 1:
745 phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE;
746 break;
747 case 2:
748 phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE;
749 break;
750 case 3:
751 phy_data |= M88E1000_PSCR_AUTO_X_1000T;
752 break;
753 case 0:
754 default:
755 phy_data |= M88E1000_PSCR_AUTO_X_MODE;
756 break;
757 }
758
759 /* Options:
760 * disable_polarity_correction = 0 (default)
761 * Automatic Correction for Reversed Cable Polarity
762 * 0 - Disabled
763 * 1 - Enabled
764 */
765 phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL;
766 if (phy->disable_polarity_correction)
767 phy_data |= M88E1000_PSCR_POLARITY_REVERSAL;
768
769 /* Enable downshift on BM (disabled by default) */
770 if (phy->type == e1000_phy_bm) {
771 /* For 82574/82583, first disable then enable downshift */
772 if (phy->id == BME1000_E_PHY_ID_R2) {
773 phy_data &= ~BME1000_PSCR_ENABLE_DOWNSHIFT;
774 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL,
775 phy_data);
776 if (ret_val)
777 return ret_val;
778 /* Commit the changes. */
779 ret_val = phy->ops.commit(hw);
780 if (ret_val) {
781 e_dbg("Error committing the PHY changes\n");
782 return ret_val;
783 }
784 }
785
786 phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT;
787 }
788
789 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
790 if (ret_val)
791 return ret_val;
792
793 if ((phy->type == e1000_phy_m88) &&
794 (phy->revision < E1000_REVISION_4) &&
795 (phy->id != BME1000_E_PHY_ID_R2)) {
796 /* Force TX_CLK in the Extended PHY Specific Control Register
797 * to 25MHz clock.
798 */
799 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
800 if (ret_val)
801 return ret_val;
802
803 phy_data |= M88E1000_EPSCR_TX_CLK_25;
804
805 if ((phy->revision == 2) && (phy->id == M88E1111_I_PHY_ID)) {
806 /* 82573L PHY - set the downshift counter to 5x. */
807 phy_data &= ~M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK;
808 phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;
809 } else {
810 /* Configure Master and Slave downshift values */
811 phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK |
812 M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK);
813 phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X |
814 M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X);
815 }
816 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
817 if (ret_val)
818 return ret_val;
819 }
820
821 if ((phy->type == e1000_phy_bm) && (phy->id == BME1000_E_PHY_ID_R2)) {
822 /* Set PHY page 0, register 29 to 0x0003 */
823 ret_val = e1e_wphy(hw, 29, 0x0003);
824 if (ret_val)
825 return ret_val;
826
827 /* Set PHY page 0, register 30 to 0x0000 */
828 ret_val = e1e_wphy(hw, 30, 0x0000);
829 if (ret_val)
830 return ret_val;
831 }
832
833 /* Commit the changes. */
834 if (phy->ops.commit) {
835 ret_val = phy->ops.commit(hw);
836 if (ret_val) {
837 e_dbg("Error committing the PHY changes\n");
838 return ret_val;
839 }
840 }
841
842 if (phy->type == e1000_phy_82578) {
843 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
844 if (ret_val)
845 return ret_val;
846
847 /* 82578 PHY - set the downshift count to 1x. */
848 phy_data |= I82578_EPSCR_DOWNSHIFT_ENABLE;
849 phy_data &= ~I82578_EPSCR_DOWNSHIFT_COUNTER_MASK;
850 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
851 if (ret_val)
852 return ret_val;
853 }
854
855 return 0;
856}
857
858/**
859 * e1000e_copper_link_setup_igp - Setup igp PHY's for copper link
860 * @hw: pointer to the HW structure
861 *
862 * Sets up LPLU, MDI/MDI-X, polarity, Smartspeed and Master/Slave config for
863 * igp PHY's.
864 **/
865s32 e1000e_copper_link_setup_igp(struct e1000_hw *hw)
866{
867 struct e1000_phy_info *phy = &hw->phy;
868 s32 ret_val;
869 u16 data;
870
871 ret_val = e1000_phy_hw_reset(hw);
872 if (ret_val) {
873 e_dbg("Error resetting the PHY.\n");
874 return ret_val;
875 }
876
877 /* Wait 100ms for MAC to configure PHY from NVM settings, to avoid
878 * timeout issues when LFS is enabled.
879 */
880 msleep(100);
881
882 /* disable lplu d0 during driver init */
883 if (hw->phy.ops.set_d0_lplu_state) {
884 ret_val = hw->phy.ops.set_d0_lplu_state(hw, false);
885 if (ret_val) {
886 e_dbg("Error Disabling LPLU D0\n");
887 return ret_val;
888 }
889 }
890 /* Configure mdi-mdix settings */
891 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &data);
892 if (ret_val)
893 return ret_val;
894
895 data &= ~IGP01E1000_PSCR_AUTO_MDIX;
896
897 switch (phy->mdix) {
898 case 1:
899 data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
900 break;
901 case 2:
902 data |= IGP01E1000_PSCR_FORCE_MDI_MDIX;
903 break;
904 case 0:
905 default:
906 data |= IGP01E1000_PSCR_AUTO_MDIX;
907 break;
908 }
909 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, data);
910 if (ret_val)
911 return ret_val;
912
913 /* set auto-master slave resolution settings */
914 if (hw->mac.autoneg) {
915 /* when autonegotiation advertisement is only 1000Mbps then we
916 * should disable SmartSpeed and enable Auto MasterSlave
917 * resolution as hardware default.
918 */
919 if (phy->autoneg_advertised == ADVERTISE_1000_FULL) {
920 /* Disable SmartSpeed */
921 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
922 &data);
923 if (ret_val)
924 return ret_val;
925
926 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
927 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
928 data);
929 if (ret_val)
930 return ret_val;
931
932 /* Set auto Master/Slave resolution process */
933 ret_val = e1e_rphy(hw, MII_CTRL1000, &data);
934 if (ret_val)
935 return ret_val;
936
937 data &= ~CTL1000_ENABLE_MASTER;
938 ret_val = e1e_wphy(hw, MII_CTRL1000, data);
939 if (ret_val)
940 return ret_val;
941 }
942
943 ret_val = e1000_set_master_slave_mode(hw);
944 }
945
946 return ret_val;
947}
948
949/**
950 * e1000_phy_setup_autoneg - Configure PHY for auto-negotiation
951 * @hw: pointer to the HW structure
952 *
953 * Reads the MII auto-neg advertisement register and/or the 1000T control
954 * register and if the PHY is already setup for auto-negotiation, then
955 * return successful. Otherwise, setup advertisement and flow control to
956 * the appropriate values for the wanted auto-negotiation.
957 **/
958static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
959{
960 struct e1000_phy_info *phy = &hw->phy;
961 s32 ret_val;
962 u16 mii_autoneg_adv_reg;
963 u16 mii_1000t_ctrl_reg = 0;
964
965 phy->autoneg_advertised &= phy->autoneg_mask;
966
967 /* Read the MII Auto-Neg Advertisement Register (Address 4). */
968 ret_val = e1e_rphy(hw, MII_ADVERTISE, &mii_autoneg_adv_reg);
969 if (ret_val)
970 return ret_val;
971
972 if (phy->autoneg_mask & ADVERTISE_1000_FULL) {
973 /* Read the MII 1000Base-T Control Register (Address 9). */
974 ret_val = e1e_rphy(hw, MII_CTRL1000, &mii_1000t_ctrl_reg);
975 if (ret_val)
976 return ret_val;
977 }
978
979 /* Need to parse both autoneg_advertised and fc and set up
980 * the appropriate PHY registers. First we will parse for
981 * autoneg_advertised software override. Since we can advertise
982 * a plethora of combinations, we need to check each bit
983 * individually.
984 */
985
986 /* First we clear all the 10/100 mb speed bits in the Auto-Neg
987 * Advertisement Register (Address 4) and the 1000 mb speed bits in
988 * the 1000Base-T Control Register (Address 9).
989 */
990 mii_autoneg_adv_reg &= ~(ADVERTISE_100FULL |
991 ADVERTISE_100HALF |
992 ADVERTISE_10FULL | ADVERTISE_10HALF);
993 mii_1000t_ctrl_reg &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
994
995 e_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);
996
997 /* Do we want to advertise 10 Mb Half Duplex? */
998 if (phy->autoneg_advertised & ADVERTISE_10_HALF) {
999 e_dbg("Advertise 10mb Half duplex\n");
1000 mii_autoneg_adv_reg |= ADVERTISE_10HALF;
1001 }
1002
1003 /* Do we want to advertise 10 Mb Full Duplex? */
1004 if (phy->autoneg_advertised & ADVERTISE_10_FULL) {
1005 e_dbg("Advertise 10mb Full duplex\n");
1006 mii_autoneg_adv_reg |= ADVERTISE_10FULL;
1007 }
1008
1009 /* Do we want to advertise 100 Mb Half Duplex? */
1010 if (phy->autoneg_advertised & ADVERTISE_100_HALF) {
1011 e_dbg("Advertise 100mb Half duplex\n");
1012 mii_autoneg_adv_reg |= ADVERTISE_100HALF;
1013 }
1014
1015 /* Do we want to advertise 100 Mb Full Duplex? */
1016 if (phy->autoneg_advertised & ADVERTISE_100_FULL) {
1017 e_dbg("Advertise 100mb Full duplex\n");
1018 mii_autoneg_adv_reg |= ADVERTISE_100FULL;
1019 }
1020
1021 /* We do not allow the Phy to advertise 1000 Mb Half Duplex */
1022 if (phy->autoneg_advertised & ADVERTISE_1000_HALF)
1023 e_dbg("Advertise 1000mb Half duplex request denied!\n");
1024
1025 /* Do we want to advertise 1000 Mb Full Duplex? */
1026 if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {
1027 e_dbg("Advertise 1000mb Full duplex\n");
1028 mii_1000t_ctrl_reg |= ADVERTISE_1000FULL;
1029 }
1030
1031 /* Check for a software override of the flow control settings, and
1032 * setup the PHY advertisement registers accordingly. If
1033 * auto-negotiation is enabled, then software will have to set the
1034 * "PAUSE" bits to the correct value in the Auto-Negotiation
1035 * Advertisement Register (MII_ADVERTISE) and re-start auto-
1036 * negotiation.
1037 *
1038 * The possible values of the "fc" parameter are:
1039 * 0: Flow control is completely disabled
1040 * 1: Rx flow control is enabled (we can receive pause frames
1041 * but not send pause frames).
1042 * 2: Tx flow control is enabled (we can send pause frames
1043 * but we do not support receiving pause frames).
1044 * 3: Both Rx and Tx flow control (symmetric) are enabled.
1045 * other: No software override. The flow control configuration
1046 * in the EEPROM is used.
1047 */
1048 switch (hw->fc.current_mode) {
1049 case e1000_fc_none:
1050 /* Flow control (Rx & Tx) is completely disabled by a
1051 * software over-ride.
1052 */
1053 mii_autoneg_adv_reg &=
1054 ~(ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1055 phy->autoneg_advertised &=
1056 ~(ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1057 break;
1058 case e1000_fc_rx_pause:
1059 /* Rx Flow control is enabled, and Tx Flow control is
1060 * disabled, by a software over-ride.
1061 *
1062 * Since there really isn't a way to advertise that we are
1063 * capable of Rx Pause ONLY, we will advertise that we
1064 * support both symmetric and asymmetric Rx PAUSE. Later
1065 * (in e1000e_config_fc_after_link_up) we will disable the
1066 * hw's ability to send PAUSE frames.
1067 */
1068 mii_autoneg_adv_reg |=
1069 (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1070 phy->autoneg_advertised |=
1071 (ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1072 break;
1073 case e1000_fc_tx_pause:
1074 /* Tx Flow control is enabled, and Rx Flow control is
1075 * disabled, by a software over-ride.
1076 */
1077 mii_autoneg_adv_reg |= ADVERTISE_PAUSE_ASYM;
1078 mii_autoneg_adv_reg &= ~ADVERTISE_PAUSE_CAP;
1079 phy->autoneg_advertised |= ADVERTISED_Asym_Pause;
1080 phy->autoneg_advertised &= ~ADVERTISED_Pause;
1081 break;
1082 case e1000_fc_full:
1083 /* Flow control (both Rx and Tx) is enabled by a software
1084 * over-ride.
1085 */
1086 mii_autoneg_adv_reg |=
1087 (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1088 phy->autoneg_advertised |=
1089 (ADVERTISED_Pause | ADVERTISED_Asym_Pause);
1090 break;
1091 default:
1092 e_dbg("Flow control param set incorrectly\n");
1093 return -E1000_ERR_CONFIG;
1094 }
1095
1096 ret_val = e1e_wphy(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
1097 if (ret_val)
1098 return ret_val;
1099
1100 e_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);
1101
1102 if (phy->autoneg_mask & ADVERTISE_1000_FULL)
1103 ret_val = e1e_wphy(hw, MII_CTRL1000, mii_1000t_ctrl_reg);
1104
1105 return ret_val;
1106}
1107
1108/**
1109 * e1000_copper_link_autoneg - Setup/Enable autoneg for copper link
1110 * @hw: pointer to the HW structure
1111 *
1112 * Performs initial bounds checking on autoneg advertisement parameter, then
1113 * configure to advertise the full capability. Setup the PHY to autoneg
1114 * and restart the negotiation process between the link partner. If
1115 * autoneg_wait_to_complete, then wait for autoneg to complete before exiting.
1116 **/
1117static s32 e1000_copper_link_autoneg(struct e1000_hw *hw)
1118{
1119 struct e1000_phy_info *phy = &hw->phy;
1120 s32 ret_val;
1121 u16 phy_ctrl;
1122
1123 /* Perform some bounds checking on the autoneg advertisement
1124 * parameter.
1125 */
1126 phy->autoneg_advertised &= phy->autoneg_mask;
1127
1128 /* If autoneg_advertised is zero, we assume it was not defaulted
1129 * by the calling code so we set to advertise full capability.
1130 */
1131 if (!phy->autoneg_advertised)
1132 phy->autoneg_advertised = phy->autoneg_mask;
1133
1134 e_dbg("Reconfiguring auto-neg advertisement params\n");
1135 ret_val = e1000_phy_setup_autoneg(hw);
1136 if (ret_val) {
1137 e_dbg("Error Setting up Auto-Negotiation\n");
1138 return ret_val;
1139 }
1140 e_dbg("Restarting Auto-Neg\n");
1141
1142 /* Restart auto-negotiation by setting the Auto Neg Enable bit and
1143 * the Auto Neg Restart bit in the PHY control register.
1144 */
1145 ret_val = e1e_rphy(hw, MII_BMCR, &phy_ctrl);
1146 if (ret_val)
1147 return ret_val;
1148
1149 phy_ctrl |= (BMCR_ANENABLE | BMCR_ANRESTART);
1150 ret_val = e1e_wphy(hw, MII_BMCR, phy_ctrl);
1151 if (ret_val)
1152 return ret_val;
1153
1154 /* Does the user want to wait for Auto-Neg to complete here, or
1155 * check at a later time (for example, callback routine).
1156 */
1157 if (phy->autoneg_wait_to_complete) {
1158 ret_val = e1000_wait_autoneg(hw);
1159 if (ret_val) {
1160 e_dbg("Error while waiting for autoneg to complete\n");
1161 return ret_val;
1162 }
1163 }
1164
1165 hw->mac.get_link_status = true;
1166
1167 return ret_val;
1168}
1169
1170/**
1171 * e1000e_setup_copper_link - Configure copper link settings
1172 * @hw: pointer to the HW structure
1173 *
1174 * Calls the appropriate function to configure the link for auto-neg or forced
1175 * speed and duplex. Then we check for link, once link is established calls
1176 * to configure collision distance and flow control are called. If link is
1177 * not established, we return -E1000_ERR_PHY (-2).
1178 **/
1179s32 e1000e_setup_copper_link(struct e1000_hw *hw)
1180{
1181 s32 ret_val;
1182 bool link;
1183
1184 if (hw->mac.autoneg) {
1185 /* Setup autoneg and flow control advertisement and perform
1186 * autonegotiation.
1187 */
1188 ret_val = e1000_copper_link_autoneg(hw);
1189 if (ret_val)
1190 return ret_val;
1191 } else {
1192 /* PHY will be set to 10H, 10F, 100H or 100F
1193 * depending on user settings.
1194 */
1195 e_dbg("Forcing Speed and Duplex\n");
1196 ret_val = hw->phy.ops.force_speed_duplex(hw);
1197 if (ret_val) {
1198 e_dbg("Error Forcing Speed and Duplex\n");
1199 return ret_val;
1200 }
1201 }
1202
1203 /* Check link status. Wait up to 100 microseconds for link to become
1204 * valid.
1205 */
1206 ret_val = e1000e_phy_has_link_generic(hw, COPPER_LINK_UP_LIMIT, 10,
1207 &link);
1208 if (ret_val)
1209 return ret_val;
1210
1211 if (link) {
1212 e_dbg("Valid link established!!!\n");
1213 hw->mac.ops.config_collision_dist(hw);
1214 ret_val = e1000e_config_fc_after_link_up(hw);
1215 } else {
1216 e_dbg("Unable to establish link!!!\n");
1217 }
1218
1219 return ret_val;
1220}
1221
1222/**
1223 * e1000e_phy_force_speed_duplex_igp - Force speed/duplex for igp PHY
1224 * @hw: pointer to the HW structure
1225 *
1226 * Calls the PHY setup function to force speed and duplex. Clears the
1227 * auto-crossover to force MDI manually. Waits for link and returns
1228 * successful if link up is successful, else -E1000_ERR_PHY (-2).
1229 **/
1230s32 e1000e_phy_force_speed_duplex_igp(struct e1000_hw *hw)
1231{
1232 struct e1000_phy_info *phy = &hw->phy;
1233 s32 ret_val;
1234 u16 phy_data;
1235 bool link;
1236
1237 ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
1238 if (ret_val)
1239 return ret_val;
1240
1241 e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
1242
1243 ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
1244 if (ret_val)
1245 return ret_val;
1246
1247 /* Clear Auto-Crossover to force MDI manually. IGP requires MDI
1248 * forced whenever speed and duplex are forced.
1249 */
1250 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data);
1251 if (ret_val)
1252 return ret_val;
1253
1254 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX;
1255 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
1256
1257 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, phy_data);
1258 if (ret_val)
1259 return ret_val;
1260
1261 e_dbg("IGP PSCR: %X\n", phy_data);
1262
1263 udelay(1);
1264
1265 if (phy->autoneg_wait_to_complete) {
1266 e_dbg("Waiting for forced speed/duplex link on IGP phy.\n");
1267
1268 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1269 100000, &link);
1270 if (ret_val)
1271 return ret_val;
1272
1273 if (!link)
1274 e_dbg("Link taking longer than expected.\n");
1275
1276 /* Try once more */
1277 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1278 100000, &link);
1279 }
1280
1281 return ret_val;
1282}
1283
1284/**
1285 * e1000e_phy_force_speed_duplex_m88 - Force speed/duplex for m88 PHY
1286 * @hw: pointer to the HW structure
1287 *
1288 * Calls the PHY setup function to force speed and duplex. Clears the
1289 * auto-crossover to force MDI manually. Resets the PHY to commit the
1290 * changes. If time expires while waiting for link up, we reset the DSP.
1291 * After reset, TX_CLK and CRS on Tx must be set. Return successful upon
1292 * successful completion, else return corresponding error code.
1293 **/
1294s32 e1000e_phy_force_speed_duplex_m88(struct e1000_hw *hw)
1295{
1296 struct e1000_phy_info *phy = &hw->phy;
1297 s32 ret_val;
1298 u16 phy_data;
1299 bool link;
1300
1301 /* Clear Auto-Crossover to force MDI manually. M88E1000 requires MDI
1302 * forced whenever speed and duplex are forced.
1303 */
1304 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1305 if (ret_val)
1306 return ret_val;
1307
1308 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
1309 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1310 if (ret_val)
1311 return ret_val;
1312
1313 e_dbg("M88E1000 PSCR: %X\n", phy_data);
1314
1315 ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
1316 if (ret_val)
1317 return ret_val;
1318
1319 e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
1320
1321 ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
1322 if (ret_val)
1323 return ret_val;
1324
1325 /* Reset the phy to commit changes. */
1326 if (hw->phy.ops.commit) {
1327 ret_val = hw->phy.ops.commit(hw);
1328 if (ret_val)
1329 return ret_val;
1330 }
1331
1332 if (phy->autoneg_wait_to_complete) {
1333 e_dbg("Waiting for forced speed/duplex link on M88 phy.\n");
1334
1335 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1336 100000, &link);
1337 if (ret_val)
1338 return ret_val;
1339
1340 if (!link) {
1341 if (hw->phy.type != e1000_phy_m88) {
1342 e_dbg("Link taking longer than expected.\n");
1343 } else {
1344 /* We didn't get link.
1345 * Reset the DSP and cross our fingers.
1346 */
1347 ret_val = e1e_wphy(hw, M88E1000_PHY_PAGE_SELECT,
1348 0x001d);
1349 if (ret_val)
1350 return ret_val;
1351 ret_val = e1000e_phy_reset_dsp(hw);
1352 if (ret_val)
1353 return ret_val;
1354 }
1355 }
1356
1357 /* Try once more */
1358 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1359 100000, &link);
1360 if (ret_val)
1361 return ret_val;
1362 }
1363
1364 if (hw->phy.type != e1000_phy_m88)
1365 return 0;
1366
1367 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
1368 if (ret_val)
1369 return ret_val;
1370
1371 /* Resetting the phy means we need to re-force TX_CLK in the
1372 * Extended PHY Specific Control Register to 25MHz clock from
1373 * the reset value of 2.5MHz.
1374 */
1375 phy_data |= M88E1000_EPSCR_TX_CLK_25;
1376 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
1377 if (ret_val)
1378 return ret_val;
1379
1380 /* In addition, we must re-enable CRS on Tx for both half and full
1381 * duplex.
1382 */
1383 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1384 if (ret_val)
1385 return ret_val;
1386
1387 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
1388 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1389
1390 return ret_val;
1391}
1392
1393/**
1394 * e1000_phy_force_speed_duplex_ife - Force PHY speed & duplex
1395 * @hw: pointer to the HW structure
1396 *
1397 * Forces the speed and duplex settings of the PHY.
1398 * This is a function pointer entry point only called by
1399 * PHY setup routines.
1400 **/
1401s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
1402{
1403 struct e1000_phy_info *phy = &hw->phy;
1404 s32 ret_val;
1405 u16 data;
1406 bool link;
1407
1408 ret_val = e1e_rphy(hw, MII_BMCR, &data);
1409 if (ret_val)
1410 return ret_val;
1411
1412 e1000e_phy_force_speed_duplex_setup(hw, &data);
1413
1414 ret_val = e1e_wphy(hw, MII_BMCR, data);
1415 if (ret_val)
1416 return ret_val;
1417
1418 /* Disable MDI-X support for 10/100 */
1419 ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
1420 if (ret_val)
1421 return ret_val;
1422
1423 data &= ~IFE_PMC_AUTO_MDIX;
1424 data &= ~IFE_PMC_FORCE_MDIX;
1425
1426 ret_val = e1e_wphy(hw, IFE_PHY_MDIX_CONTROL, data);
1427 if (ret_val)
1428 return ret_val;
1429
1430 e_dbg("IFE PMC: %X\n", data);
1431
1432 udelay(1);
1433
1434 if (phy->autoneg_wait_to_complete) {
1435 e_dbg("Waiting for forced speed/duplex link on IFE phy.\n");
1436
1437 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1438 100000, &link);
1439 if (ret_val)
1440 return ret_val;
1441
1442 if (!link)
1443 e_dbg("Link taking longer than expected.\n");
1444
1445 /* Try once more */
1446 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1447 100000, &link);
1448 if (ret_val)
1449 return ret_val;
1450 }
1451
1452 return 0;
1453}
1454
1455/**
1456 * e1000e_phy_force_speed_duplex_setup - Configure forced PHY speed/duplex
1457 * @hw: pointer to the HW structure
1458 * @phy_ctrl: pointer to current value of MII_BMCR
1459 *
1460 * Forces speed and duplex on the PHY by doing the following: disable flow
1461 * control, force speed/duplex on the MAC, disable auto speed detection,
1462 * disable auto-negotiation, configure duplex, configure speed, configure
1463 * the collision distance, write configuration to CTRL register. The
1464 * caller must write to the MII_BMCR register for these settings to
1465 * take affect.
1466 **/
1467void e1000e_phy_force_speed_duplex_setup(struct e1000_hw *hw, u16 *phy_ctrl)
1468{
1469 struct e1000_mac_info *mac = &hw->mac;
1470 u32 ctrl;
1471
1472 /* Turn off flow control when forcing speed/duplex */
1473 hw->fc.current_mode = e1000_fc_none;
1474
1475 /* Force speed/duplex on the mac */
1476 ctrl = er32(CTRL);
1477 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
1478 ctrl &= ~E1000_CTRL_SPD_SEL;
1479
1480 /* Disable Auto Speed Detection */
1481 ctrl &= ~E1000_CTRL_ASDE;
1482
1483 /* Disable autoneg on the phy */
1484 *phy_ctrl &= ~BMCR_ANENABLE;
1485
1486 /* Forcing Full or Half Duplex? */
1487 if (mac->forced_speed_duplex & E1000_ALL_HALF_DUPLEX) {
1488 ctrl &= ~E1000_CTRL_FD;
1489 *phy_ctrl &= ~BMCR_FULLDPLX;
1490 e_dbg("Half Duplex\n");
1491 } else {
1492 ctrl |= E1000_CTRL_FD;
1493 *phy_ctrl |= BMCR_FULLDPLX;
1494 e_dbg("Full Duplex\n");
1495 }
1496
1497 /* Forcing 10mb or 100mb? */
1498 if (mac->forced_speed_duplex & E1000_ALL_100_SPEED) {
1499 ctrl |= E1000_CTRL_SPD_100;
1500 *phy_ctrl |= BMCR_SPEED100;
1501 *phy_ctrl &= ~BMCR_SPEED1000;
1502 e_dbg("Forcing 100mb\n");
1503 } else {
1504 ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
1505 *phy_ctrl &= ~(BMCR_SPEED1000 | BMCR_SPEED100);
1506 e_dbg("Forcing 10mb\n");
1507 }
1508
1509 hw->mac.ops.config_collision_dist(hw);
1510
1511 ew32(CTRL, ctrl);
1512}
1513
1514/**
1515 * e1000e_set_d3_lplu_state - Sets low power link up state for D3
1516 * @hw: pointer to the HW structure
1517 * @active: boolean used to enable/disable lplu
1518 *
1519 * Success returns 0, Failure returns 1
1520 *
1521 * The low power link up (lplu) state is set to the power management level D3
1522 * and SmartSpeed is disabled when active is true, else clear lplu for D3
1523 * and enable Smartspeed. LPLU and Smartspeed are mutually exclusive. LPLU
1524 * is used during Dx states where the power conservation is most important.
1525 * During driver activity, SmartSpeed should be enabled so performance is
1526 * maintained.
1527 **/
1528s32 e1000e_set_d3_lplu_state(struct e1000_hw *hw, bool active)
1529{
1530 struct e1000_phy_info *phy = &hw->phy;
1531 s32 ret_val;
1532 u16 data;
1533
1534 ret_val = e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &data);
1535 if (ret_val)
1536 return ret_val;
1537
1538 if (!active) {
1539 data &= ~IGP02E1000_PM_D3_LPLU;
1540 ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
1541 if (ret_val)
1542 return ret_val;
1543 /* LPLU and SmartSpeed are mutually exclusive. LPLU is used
1544 * during Dx states where the power conservation is most
1545 * important. During driver activity we should enable
1546 * SmartSpeed, so performance is maintained.
1547 */
1548 if (phy->smart_speed == e1000_smart_speed_on) {
1549 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1550 &data);
1551 if (ret_val)
1552 return ret_val;
1553
1554 data |= IGP01E1000_PSCFR_SMART_SPEED;
1555 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1556 data);
1557 if (ret_val)
1558 return ret_val;
1559 } else if (phy->smart_speed == e1000_smart_speed_off) {
1560 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1561 &data);
1562 if (ret_val)
1563 return ret_val;
1564
1565 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1566 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1567 data);
1568 if (ret_val)
1569 return ret_val;
1570 }
1571 } else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) ||
1572 (phy->autoneg_advertised == E1000_ALL_NOT_GIG) ||
1573 (phy->autoneg_advertised == E1000_ALL_10_SPEED)) {
1574 data |= IGP02E1000_PM_D3_LPLU;
1575 ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
1576 if (ret_val)
1577 return ret_val;
1578
1579 /* When LPLU is enabled, we should disable SmartSpeed */
1580 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, &data);
1581 if (ret_val)
1582 return ret_val;
1583
1584 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1585 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, data);
1586 }
1587
1588 return ret_val;
1589}
1590
1591/**
1592 * e1000e_check_downshift - Checks whether a downshift in speed occurred
1593 * @hw: pointer to the HW structure
1594 *
1595 * Success returns 0, Failure returns 1
1596 *
1597 * A downshift is detected by querying the PHY link health.
1598 **/
1599s32 e1000e_check_downshift(struct e1000_hw *hw)
1600{
1601 struct e1000_phy_info *phy = &hw->phy;
1602 s32 ret_val;
1603 u16 phy_data, offset, mask;
1604
1605 switch (phy->type) {
1606 case e1000_phy_m88:
1607 case e1000_phy_gg82563:
1608 case e1000_phy_bm:
1609 case e1000_phy_82578:
1610 offset = M88E1000_PHY_SPEC_STATUS;
1611 mask = M88E1000_PSSR_DOWNSHIFT;
1612 break;
1613 case e1000_phy_igp_2:
1614 case e1000_phy_igp_3:
1615 offset = IGP01E1000_PHY_LINK_HEALTH;
1616 mask = IGP01E1000_PLHR_SS_DOWNGRADE;
1617 break;
1618 default:
1619 /* speed downshift not supported */
1620 phy->speed_downgraded = false;
1621 return 0;
1622 }
1623
1624 ret_val = e1e_rphy(hw, offset, &phy_data);
1625
1626 if (!ret_val)
1627 phy->speed_downgraded = !!(phy_data & mask);
1628
1629 return ret_val;
1630}
1631
1632/**
1633 * e1000_check_polarity_m88 - Checks the polarity.
1634 * @hw: pointer to the HW structure
1635 *
1636 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
1637 *
1638 * Polarity is determined based on the PHY specific status register.
1639 **/
1640s32 e1000_check_polarity_m88(struct e1000_hw *hw)
1641{
1642 struct e1000_phy_info *phy = &hw->phy;
1643 s32 ret_val;
1644 u16 data;
1645
1646 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &data);
1647
1648 if (!ret_val)
1649 phy->cable_polarity = ((data & M88E1000_PSSR_REV_POLARITY)
1650 ? e1000_rev_polarity_reversed
1651 : e1000_rev_polarity_normal);
1652
1653 return ret_val;
1654}
1655
1656/**
1657 * e1000_check_polarity_igp - Checks the polarity.
1658 * @hw: pointer to the HW structure
1659 *
1660 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
1661 *
1662 * Polarity is determined based on the PHY port status register, and the
1663 * current speed (since there is no polarity at 100Mbps).
1664 **/
1665s32 e1000_check_polarity_igp(struct e1000_hw *hw)
1666{
1667 struct e1000_phy_info *phy = &hw->phy;
1668 s32 ret_val;
1669 u16 data, offset, mask;
1670
1671 /* Polarity is determined based on the speed of
1672 * our connection.
1673 */
1674 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data);
1675 if (ret_val)
1676 return ret_val;
1677
1678 if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
1679 IGP01E1000_PSSR_SPEED_1000MBPS) {
1680 offset = IGP01E1000_PHY_PCS_INIT_REG;
1681 mask = IGP01E1000_PHY_POLARITY_MASK;
1682 } else {
1683 /* This really only applies to 10Mbps since
1684 * there is no polarity for 100Mbps (always 0).
1685 */
1686 offset = IGP01E1000_PHY_PORT_STATUS;
1687 mask = IGP01E1000_PSSR_POLARITY_REVERSED;
1688 }
1689
1690 ret_val = e1e_rphy(hw, offset, &data);
1691
1692 if (!ret_val)
1693 phy->cable_polarity = ((data & mask)
1694 ? e1000_rev_polarity_reversed
1695 : e1000_rev_polarity_normal);
1696
1697 return ret_val;
1698}
1699
1700/**
1701 * e1000_check_polarity_ife - Check cable polarity for IFE PHY
1702 * @hw: pointer to the HW structure
1703 *
1704 * Polarity is determined on the polarity reversal feature being enabled.
1705 **/
1706s32 e1000_check_polarity_ife(struct e1000_hw *hw)
1707{
1708 struct e1000_phy_info *phy = &hw->phy;
1709 s32 ret_val;
1710 u16 phy_data, offset, mask;
1711
1712 /* Polarity is determined based on the reversal feature being enabled.
1713 */
1714 if (phy->polarity_correction) {
1715 offset = IFE_PHY_EXTENDED_STATUS_CONTROL;
1716 mask = IFE_PESC_POLARITY_REVERSED;
1717 } else {
1718 offset = IFE_PHY_SPECIAL_CONTROL;
1719 mask = IFE_PSC_FORCE_POLARITY;
1720 }
1721
1722 ret_val = e1e_rphy(hw, offset, &phy_data);
1723
1724 if (!ret_val)
1725 phy->cable_polarity = ((phy_data & mask)
1726 ? e1000_rev_polarity_reversed
1727 : e1000_rev_polarity_normal);
1728
1729 return ret_val;
1730}
1731
1732/**
1733 * e1000_wait_autoneg - Wait for auto-neg completion
1734 * @hw: pointer to the HW structure
1735 *
1736 * Waits for auto-negotiation to complete or for the auto-negotiation time
1737 * limit to expire, which ever happens first.
1738 **/
1739static s32 e1000_wait_autoneg(struct e1000_hw *hw)
1740{
1741 s32 ret_val = 0;
1742 u16 i, phy_status;
1743
1744 /* Break after autoneg completes or PHY_AUTO_NEG_LIMIT expires. */
1745 for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {
1746 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1747 if (ret_val)
1748 break;
1749 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1750 if (ret_val)
1751 break;
1752 if (phy_status & BMSR_ANEGCOMPLETE)
1753 break;
1754 msleep(100);
1755 }
1756
1757 /* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation
1758 * has completed.
1759 */
1760 return ret_val;
1761}
1762
1763/**
1764 * e1000e_phy_has_link_generic - Polls PHY for link
1765 * @hw: pointer to the HW structure
1766 * @iterations: number of times to poll for link
1767 * @usec_interval: delay between polling attempts
1768 * @success: pointer to whether polling was successful or not
1769 *
1770 * Polls the PHY status register for link, 'iterations' number of times.
1771 **/
1772s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations,
1773 u32 usec_interval, bool *success)
1774{
1775 s32 ret_val = 0;
1776 u16 i, phy_status;
1777
1778 *success = false;
1779 for (i = 0; i < iterations; i++) {
1780 /* Some PHYs require the MII_BMSR register to be read
1781 * twice due to the link bit being sticky. No harm doing
1782 * it across the board.
1783 */
1784 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1785 if (ret_val) {
1786 /* If the first read fails, another entity may have
1787 * ownership of the resources, wait and try again to
1788 * see if they have relinquished the resources yet.
1789 */
1790 if (usec_interval >= 1000)
1791 msleep(usec_interval / 1000);
1792 else
1793 udelay(usec_interval);
1794 }
1795 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1796 if (ret_val)
1797 break;
1798 if (phy_status & BMSR_LSTATUS) {
1799 *success = true;
1800 break;
1801 }
1802 if (usec_interval >= 1000)
1803 msleep(usec_interval / 1000);
1804 else
1805 udelay(usec_interval);
1806 }
1807
1808 return ret_val;
1809}
1810
1811/**
1812 * e1000e_get_cable_length_m88 - Determine cable length for m88 PHY
1813 * @hw: pointer to the HW structure
1814 *
1815 * Reads the PHY specific status register to retrieve the cable length
1816 * information. The cable length is determined by averaging the minimum and
1817 * maximum values to get the "average" cable length. The m88 PHY has four
1818 * possible cable length values, which are:
1819 * Register Value Cable Length
1820 * 0 < 50 meters
1821 * 1 50 - 80 meters
1822 * 2 80 - 110 meters
1823 * 3 110 - 140 meters
1824 * 4 > 140 meters
1825 **/
1826s32 e1000e_get_cable_length_m88(struct e1000_hw *hw)
1827{
1828 struct e1000_phy_info *phy = &hw->phy;
1829 s32 ret_val;
1830 u16 phy_data, index;
1831
1832 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1833 if (ret_val)
1834 return ret_val;
1835
1836 index = FIELD_GET(M88E1000_PSSR_CABLE_LENGTH, phy_data);
1837
1838 if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1)
1839 return -E1000_ERR_PHY;
1840
1841 phy->min_cable_length = e1000_m88_cable_length_table[index];
1842 phy->max_cable_length = e1000_m88_cable_length_table[index + 1];
1843
1844 phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
1845
1846 return 0;
1847}
1848
1849/**
1850 * e1000e_get_cable_length_igp_2 - Determine cable length for igp2 PHY
1851 * @hw: pointer to the HW structure
1852 *
1853 * The automatic gain control (agc) normalizes the amplitude of the
1854 * received signal, adjusting for the attenuation produced by the
1855 * cable. By reading the AGC registers, which represent the
1856 * combination of coarse and fine gain value, the value can be put
1857 * into a lookup table to obtain the approximate cable length
1858 * for each channel.
1859 **/
1860s32 e1000e_get_cable_length_igp_2(struct e1000_hw *hw)
1861{
1862 struct e1000_phy_info *phy = &hw->phy;
1863 s32 ret_val;
1864 u16 phy_data, i, agc_value = 0;
1865 u16 cur_agc_index, max_agc_index = 0;
1866 u16 min_agc_index = IGP02E1000_CABLE_LENGTH_TABLE_SIZE - 1;
1867 static const u16 agc_reg_array[IGP02E1000_PHY_CHANNEL_NUM] = {
1868 IGP02E1000_PHY_AGC_A,
1869 IGP02E1000_PHY_AGC_B,
1870 IGP02E1000_PHY_AGC_C,
1871 IGP02E1000_PHY_AGC_D
1872 };
1873
1874 /* Read the AGC registers for all channels */
1875 for (i = 0; i < IGP02E1000_PHY_CHANNEL_NUM; i++) {
1876 ret_val = e1e_rphy(hw, agc_reg_array[i], &phy_data);
1877 if (ret_val)
1878 return ret_val;
1879
1880 /* Getting bits 15:9, which represent the combination of
1881 * coarse and fine gain values. The result is a number
1882 * that can be put into the lookup table to obtain the
1883 * approximate cable length.
1884 */
1885 cur_agc_index = ((phy_data >> IGP02E1000_AGC_LENGTH_SHIFT) &
1886 IGP02E1000_AGC_LENGTH_MASK);
1887
1888 /* Array index bound check. */
1889 if ((cur_agc_index >= IGP02E1000_CABLE_LENGTH_TABLE_SIZE) ||
1890 (cur_agc_index == 0))
1891 return -E1000_ERR_PHY;
1892
1893 /* Remove min & max AGC values from calculation. */
1894 if (e1000_igp_2_cable_length_table[min_agc_index] >
1895 e1000_igp_2_cable_length_table[cur_agc_index])
1896 min_agc_index = cur_agc_index;
1897 if (e1000_igp_2_cable_length_table[max_agc_index] <
1898 e1000_igp_2_cable_length_table[cur_agc_index])
1899 max_agc_index = cur_agc_index;
1900
1901 agc_value += e1000_igp_2_cable_length_table[cur_agc_index];
1902 }
1903
1904 agc_value -= (e1000_igp_2_cable_length_table[min_agc_index] +
1905 e1000_igp_2_cable_length_table[max_agc_index]);
1906 agc_value /= (IGP02E1000_PHY_CHANNEL_NUM - 2);
1907
1908 /* Calculate cable length with the error range of +/- 10 meters. */
1909 phy->min_cable_length = (((agc_value - IGP02E1000_AGC_RANGE) > 0) ?
1910 (agc_value - IGP02E1000_AGC_RANGE) : 0);
1911 phy->max_cable_length = agc_value + IGP02E1000_AGC_RANGE;
1912
1913 phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
1914
1915 return 0;
1916}
1917
1918/**
1919 * e1000e_get_phy_info_m88 - Retrieve PHY information
1920 * @hw: pointer to the HW structure
1921 *
1922 * Valid for only copper links. Read the PHY status register (sticky read)
1923 * to verify that link is up. Read the PHY special control register to
1924 * determine the polarity and 10base-T extended distance. Read the PHY
1925 * special status register to determine MDI/MDIx and current speed. If
1926 * speed is 1000, then determine cable length, local and remote receiver.
1927 **/
1928s32 e1000e_get_phy_info_m88(struct e1000_hw *hw)
1929{
1930 struct e1000_phy_info *phy = &hw->phy;
1931 s32 ret_val;
1932 u16 phy_data;
1933 bool link;
1934
1935 if (phy->media_type != e1000_media_type_copper) {
1936 e_dbg("Phy info is only valid for copper media\n");
1937 return -E1000_ERR_CONFIG;
1938 }
1939
1940 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
1941 if (ret_val)
1942 return ret_val;
1943
1944 if (!link) {
1945 e_dbg("Phy info is only valid if link is up\n");
1946 return -E1000_ERR_CONFIG;
1947 }
1948
1949 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1950 if (ret_val)
1951 return ret_val;
1952
1953 phy->polarity_correction = !!(phy_data &
1954 M88E1000_PSCR_POLARITY_REVERSAL);
1955
1956 ret_val = e1000_check_polarity_m88(hw);
1957 if (ret_val)
1958 return ret_val;
1959
1960 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1961 if (ret_val)
1962 return ret_val;
1963
1964 phy->is_mdix = !!(phy_data & M88E1000_PSSR_MDIX);
1965
1966 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) {
1967 ret_val = hw->phy.ops.get_cable_length(hw);
1968 if (ret_val)
1969 return ret_val;
1970
1971 ret_val = e1e_rphy(hw, MII_STAT1000, &phy_data);
1972 if (ret_val)
1973 return ret_val;
1974
1975 phy->local_rx = (phy_data & LPA_1000LOCALRXOK)
1976 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1977
1978 phy->remote_rx = (phy_data & LPA_1000REMRXOK)
1979 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1980 } else {
1981 /* Set values to "undefined" */
1982 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
1983 phy->local_rx = e1000_1000t_rx_status_undefined;
1984 phy->remote_rx = e1000_1000t_rx_status_undefined;
1985 }
1986
1987 return ret_val;
1988}
1989
1990/**
1991 * e1000e_get_phy_info_igp - Retrieve igp PHY information
1992 * @hw: pointer to the HW structure
1993 *
1994 * Read PHY status to determine if link is up. If link is up, then
1995 * set/determine 10base-T extended distance and polarity correction. Read
1996 * PHY port status to determine MDI/MDIx and speed. Based on the speed,
1997 * determine on the cable length, local and remote receiver.
1998 **/
1999s32 e1000e_get_phy_info_igp(struct e1000_hw *hw)
2000{
2001 struct e1000_phy_info *phy = &hw->phy;
2002 s32 ret_val;
2003 u16 data;
2004 bool link;
2005
2006 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
2007 if (ret_val)
2008 return ret_val;
2009
2010 if (!link) {
2011 e_dbg("Phy info is only valid if link is up\n");
2012 return -E1000_ERR_CONFIG;
2013 }
2014
2015 phy->polarity_correction = true;
2016
2017 ret_val = e1000_check_polarity_igp(hw);
2018 if (ret_val)
2019 return ret_val;
2020
2021 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data);
2022 if (ret_val)
2023 return ret_val;
2024
2025 phy->is_mdix = !!(data & IGP01E1000_PSSR_MDIX);
2026
2027 if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
2028 IGP01E1000_PSSR_SPEED_1000MBPS) {
2029 ret_val = phy->ops.get_cable_length(hw);
2030 if (ret_val)
2031 return ret_val;
2032
2033 ret_val = e1e_rphy(hw, MII_STAT1000, &data);
2034 if (ret_val)
2035 return ret_val;
2036
2037 phy->local_rx = (data & LPA_1000LOCALRXOK)
2038 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
2039
2040 phy->remote_rx = (data & LPA_1000REMRXOK)
2041 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
2042 } else {
2043 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
2044 phy->local_rx = e1000_1000t_rx_status_undefined;
2045 phy->remote_rx = e1000_1000t_rx_status_undefined;
2046 }
2047
2048 return ret_val;
2049}
2050
2051/**
2052 * e1000_get_phy_info_ife - Retrieves various IFE PHY states
2053 * @hw: pointer to the HW structure
2054 *
2055 * Populates "phy" structure with various feature states.
2056 **/
2057s32 e1000_get_phy_info_ife(struct e1000_hw *hw)
2058{
2059 struct e1000_phy_info *phy = &hw->phy;
2060 s32 ret_val;
2061 u16 data;
2062 bool link;
2063
2064 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
2065 if (ret_val)
2066 return ret_val;
2067
2068 if (!link) {
2069 e_dbg("Phy info is only valid if link is up\n");
2070 return -E1000_ERR_CONFIG;
2071 }
2072
2073 ret_val = e1e_rphy(hw, IFE_PHY_SPECIAL_CONTROL, &data);
2074 if (ret_val)
2075 return ret_val;
2076 phy->polarity_correction = !(data & IFE_PSC_AUTO_POLARITY_DISABLE);
2077
2078 if (phy->polarity_correction) {
2079 ret_val = e1000_check_polarity_ife(hw);
2080 if (ret_val)
2081 return ret_val;
2082 } else {
2083 /* Polarity is forced */
2084 phy->cable_polarity = ((data & IFE_PSC_FORCE_POLARITY)
2085 ? e1000_rev_polarity_reversed
2086 : e1000_rev_polarity_normal);
2087 }
2088
2089 ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
2090 if (ret_val)
2091 return ret_val;
2092
2093 phy->is_mdix = !!(data & IFE_PMC_MDIX_STATUS);
2094
2095 /* The following parameters are undefined for 10/100 operation. */
2096 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
2097 phy->local_rx = e1000_1000t_rx_status_undefined;
2098 phy->remote_rx = e1000_1000t_rx_status_undefined;
2099
2100 return 0;
2101}
2102
2103/**
2104 * e1000e_phy_sw_reset - PHY software reset
2105 * @hw: pointer to the HW structure
2106 *
2107 * Does a software reset of the PHY by reading the PHY control register and
2108 * setting/write the control register reset bit to the PHY.
2109 **/
2110s32 e1000e_phy_sw_reset(struct e1000_hw *hw)
2111{
2112 s32 ret_val;
2113 u16 phy_ctrl;
2114
2115 ret_val = e1e_rphy(hw, MII_BMCR, &phy_ctrl);
2116 if (ret_val)
2117 return ret_val;
2118
2119 phy_ctrl |= BMCR_RESET;
2120 ret_val = e1e_wphy(hw, MII_BMCR, phy_ctrl);
2121 if (ret_val)
2122 return ret_val;
2123
2124 udelay(1);
2125
2126 return ret_val;
2127}
2128
2129/**
2130 * e1000e_phy_hw_reset_generic - PHY hardware reset
2131 * @hw: pointer to the HW structure
2132 *
2133 * Verify the reset block is not blocking us from resetting. Acquire
2134 * semaphore (if necessary) and read/set/write the device control reset
2135 * bit in the PHY. Wait the appropriate delay time for the device to
2136 * reset and release the semaphore (if necessary).
2137 **/
2138s32 e1000e_phy_hw_reset_generic(struct e1000_hw *hw)
2139{
2140 struct e1000_phy_info *phy = &hw->phy;
2141 s32 ret_val;
2142 u32 ctrl;
2143
2144 if (phy->ops.check_reset_block) {
2145 ret_val = phy->ops.check_reset_block(hw);
2146 if (ret_val)
2147 return 0;
2148 }
2149
2150 ret_val = phy->ops.acquire(hw);
2151 if (ret_val)
2152 return ret_val;
2153
2154 ctrl = er32(CTRL);
2155 ew32(CTRL, ctrl | E1000_CTRL_PHY_RST);
2156 e1e_flush();
2157
2158 udelay(phy->reset_delay_us);
2159
2160 ew32(CTRL, ctrl);
2161 e1e_flush();
2162
2163 usleep_range(150, 300);
2164
2165 phy->ops.release(hw);
2166
2167 return phy->ops.get_cfg_done(hw);
2168}
2169
2170/**
2171 * e1000e_get_cfg_done_generic - Generic configuration done
2172 * @hw: pointer to the HW structure
2173 *
2174 * Generic function to wait 10 milli-seconds for configuration to complete
2175 * and return success.
2176 **/
2177s32 e1000e_get_cfg_done_generic(struct e1000_hw __always_unused *hw)
2178{
2179 mdelay(10);
2180
2181 return 0;
2182}
2183
2184/**
2185 * e1000e_phy_init_script_igp3 - Inits the IGP3 PHY
2186 * @hw: pointer to the HW structure
2187 *
2188 * Initializes a Intel Gigabit PHY3 when an EEPROM is not present.
2189 **/
2190s32 e1000e_phy_init_script_igp3(struct e1000_hw *hw)
2191{
2192 e_dbg("Running IGP 3 PHY init script\n");
2193
2194 /* PHY init IGP 3 */
2195 /* Enable rise/fall, 10-mode work in class-A */
2196 e1e_wphy(hw, 0x2F5B, 0x9018);
2197 /* Remove all caps from Replica path filter */
2198 e1e_wphy(hw, 0x2F52, 0x0000);
2199 /* Bias trimming for ADC, AFE and Driver (Default) */
2200 e1e_wphy(hw, 0x2FB1, 0x8B24);
2201 /* Increase Hybrid poly bias */
2202 e1e_wphy(hw, 0x2FB2, 0xF8F0);
2203 /* Add 4% to Tx amplitude in Gig mode */
2204 e1e_wphy(hw, 0x2010, 0x10B0);
2205 /* Disable trimming (TTT) */
2206 e1e_wphy(hw, 0x2011, 0x0000);
2207 /* Poly DC correction to 94.6% + 2% for all channels */
2208 e1e_wphy(hw, 0x20DD, 0x249A);
2209 /* ABS DC correction to 95.9% */
2210 e1e_wphy(hw, 0x20DE, 0x00D3);
2211 /* BG temp curve trim */
2212 e1e_wphy(hw, 0x28B4, 0x04CE);
2213 /* Increasing ADC OPAMP stage 1 currents to max */
2214 e1e_wphy(hw, 0x2F70, 0x29E4);
2215 /* Force 1000 ( required for enabling PHY regs configuration) */
2216 e1e_wphy(hw, 0x0000, 0x0140);
2217 /* Set upd_freq to 6 */
2218 e1e_wphy(hw, 0x1F30, 0x1606);
2219 /* Disable NPDFE */
2220 e1e_wphy(hw, 0x1F31, 0xB814);
2221 /* Disable adaptive fixed FFE (Default) */
2222 e1e_wphy(hw, 0x1F35, 0x002A);
2223 /* Enable FFE hysteresis */
2224 e1e_wphy(hw, 0x1F3E, 0x0067);
2225 /* Fixed FFE for short cable lengths */
2226 e1e_wphy(hw, 0x1F54, 0x0065);
2227 /* Fixed FFE for medium cable lengths */
2228 e1e_wphy(hw, 0x1F55, 0x002A);
2229 /* Fixed FFE for long cable lengths */
2230 e1e_wphy(hw, 0x1F56, 0x002A);
2231 /* Enable Adaptive Clip Threshold */
2232 e1e_wphy(hw, 0x1F72, 0x3FB0);
2233 /* AHT reset limit to 1 */
2234 e1e_wphy(hw, 0x1F76, 0xC0FF);
2235 /* Set AHT master delay to 127 msec */
2236 e1e_wphy(hw, 0x1F77, 0x1DEC);
2237 /* Set scan bits for AHT */
2238 e1e_wphy(hw, 0x1F78, 0xF9EF);
2239 /* Set AHT Preset bits */
2240 e1e_wphy(hw, 0x1F79, 0x0210);
2241 /* Change integ_factor of channel A to 3 */
2242 e1e_wphy(hw, 0x1895, 0x0003);
2243 /* Change prop_factor of channels BCD to 8 */
2244 e1e_wphy(hw, 0x1796, 0x0008);
2245 /* Change cg_icount + enable integbp for channels BCD */
2246 e1e_wphy(hw, 0x1798, 0xD008);
2247 /* Change cg_icount + enable integbp + change prop_factor_master
2248 * to 8 for channel A
2249 */
2250 e1e_wphy(hw, 0x1898, 0xD918);
2251 /* Disable AHT in Slave mode on channel A */
2252 e1e_wphy(hw, 0x187A, 0x0800);
2253 /* Enable LPLU and disable AN to 1000 in non-D0a states,
2254 * Enable SPD+B2B
2255 */
2256 e1e_wphy(hw, 0x0019, 0x008D);
2257 /* Enable restart AN on an1000_dis change */
2258 e1e_wphy(hw, 0x001B, 0x2080);
2259 /* Enable wh_fifo read clock in 10/100 modes */
2260 e1e_wphy(hw, 0x0014, 0x0045);
2261 /* Restart AN, Speed selection is 1000 */
2262 e1e_wphy(hw, 0x0000, 0x1340);
2263
2264 return 0;
2265}
2266
2267/**
2268 * e1000e_get_phy_type_from_id - Get PHY type from id
2269 * @phy_id: phy_id read from the phy
2270 *
2271 * Returns the phy type from the id.
2272 **/
2273enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id)
2274{
2275 enum e1000_phy_type phy_type = e1000_phy_unknown;
2276
2277 switch (phy_id) {
2278 case M88E1000_I_PHY_ID:
2279 case M88E1000_E_PHY_ID:
2280 case M88E1111_I_PHY_ID:
2281 case M88E1011_I_PHY_ID:
2282 phy_type = e1000_phy_m88;
2283 break;
2284 case IGP01E1000_I_PHY_ID: /* IGP 1 & 2 share this */
2285 phy_type = e1000_phy_igp_2;
2286 break;
2287 case GG82563_E_PHY_ID:
2288 phy_type = e1000_phy_gg82563;
2289 break;
2290 case IGP03E1000_E_PHY_ID:
2291 phy_type = e1000_phy_igp_3;
2292 break;
2293 case IFE_E_PHY_ID:
2294 case IFE_PLUS_E_PHY_ID:
2295 case IFE_C_E_PHY_ID:
2296 phy_type = e1000_phy_ife;
2297 break;
2298 case BME1000_E_PHY_ID:
2299 case BME1000_E_PHY_ID_R2:
2300 phy_type = e1000_phy_bm;
2301 break;
2302 case I82578_E_PHY_ID:
2303 phy_type = e1000_phy_82578;
2304 break;
2305 case I82577_E_PHY_ID:
2306 phy_type = e1000_phy_82577;
2307 break;
2308 case I82579_E_PHY_ID:
2309 phy_type = e1000_phy_82579;
2310 break;
2311 case I217_E_PHY_ID:
2312 phy_type = e1000_phy_i217;
2313 break;
2314 default:
2315 phy_type = e1000_phy_unknown;
2316 break;
2317 }
2318 return phy_type;
2319}
2320
2321/**
2322 * e1000e_determine_phy_address - Determines PHY address.
2323 * @hw: pointer to the HW structure
2324 *
2325 * This uses a trial and error method to loop through possible PHY
2326 * addresses. It tests each by reading the PHY ID registers and
2327 * checking for a match.
2328 **/
2329s32 e1000e_determine_phy_address(struct e1000_hw *hw)
2330{
2331 u32 phy_addr = 0;
2332 u32 i;
2333 enum e1000_phy_type phy_type = e1000_phy_unknown;
2334
2335 hw->phy.id = phy_type;
2336
2337 for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) {
2338 hw->phy.addr = phy_addr;
2339 i = 0;
2340
2341 do {
2342 e1000e_get_phy_id(hw);
2343 phy_type = e1000e_get_phy_type_from_id(hw->phy.id);
2344
2345 /* If phy_type is valid, break - we found our
2346 * PHY address
2347 */
2348 if (phy_type != e1000_phy_unknown)
2349 return 0;
2350
2351 usleep_range(1000, 2000);
2352 i++;
2353 } while (i < 10);
2354 }
2355
2356 return -E1000_ERR_PHY_TYPE;
2357}
2358
2359/**
2360 * e1000_get_phy_addr_for_bm_page - Retrieve PHY page address
2361 * @page: page to access
2362 * @reg: register to check
2363 *
2364 * Returns the phy address for the page requested.
2365 **/
2366static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg)
2367{
2368 u32 phy_addr = 2;
2369
2370 if ((page >= 768) || (page == 0 && reg == 25) || (reg == 31))
2371 phy_addr = 1;
2372
2373 return phy_addr;
2374}
2375
2376/**
2377 * e1000e_write_phy_reg_bm - Write BM PHY register
2378 * @hw: pointer to the HW structure
2379 * @offset: register offset to write to
2380 * @data: data to write at register offset
2381 *
2382 * Acquires semaphore, if necessary, then writes the data to PHY register
2383 * at the offset. Release any acquired semaphores before exiting.
2384 **/
2385s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
2386{
2387 s32 ret_val;
2388 u32 page = offset >> IGP_PAGE_SHIFT;
2389
2390 ret_val = hw->phy.ops.acquire(hw);
2391 if (ret_val)
2392 return ret_val;
2393
2394 /* Page 800 works differently than the rest so it has its own func */
2395 if (page == BM_WUC_PAGE) {
2396 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2397 false, false);
2398 goto release;
2399 }
2400
2401 hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
2402
2403 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2404 u32 page_shift, page_select;
2405
2406 /* Page select is register 31 for phy address 1 and 22 for
2407 * phy address 2 and 3. Page select is shifted only for
2408 * phy address 1.
2409 */
2410 if (hw->phy.addr == 1) {
2411 page_shift = IGP_PAGE_SHIFT;
2412 page_select = IGP01E1000_PHY_PAGE_SELECT;
2413 } else {
2414 page_shift = 0;
2415 page_select = BM_PHY_PAGE_SELECT;
2416 }
2417
2418 /* Page is shifted left, PHY expects (page x 32) */
2419 ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
2420 (page << page_shift));
2421 if (ret_val)
2422 goto release;
2423 }
2424
2425 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2426 data);
2427
2428release:
2429 hw->phy.ops.release(hw);
2430 return ret_val;
2431}
2432
2433/**
2434 * e1000e_read_phy_reg_bm - Read BM PHY register
2435 * @hw: pointer to the HW structure
2436 * @offset: register offset to be read
2437 * @data: pointer to the read data
2438 *
2439 * Acquires semaphore, if necessary, then reads the PHY register at offset
2440 * and storing the retrieved information in data. Release any acquired
2441 * semaphores before exiting.
2442 **/
2443s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
2444{
2445 s32 ret_val;
2446 u32 page = offset >> IGP_PAGE_SHIFT;
2447
2448 ret_val = hw->phy.ops.acquire(hw);
2449 if (ret_val)
2450 return ret_val;
2451
2452 /* Page 800 works differently than the rest so it has its own func */
2453 if (page == BM_WUC_PAGE) {
2454 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2455 true, false);
2456 goto release;
2457 }
2458
2459 hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
2460
2461 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2462 u32 page_shift, page_select;
2463
2464 /* Page select is register 31 for phy address 1 and 22 for
2465 * phy address 2 and 3. Page select is shifted only for
2466 * phy address 1.
2467 */
2468 if (hw->phy.addr == 1) {
2469 page_shift = IGP_PAGE_SHIFT;
2470 page_select = IGP01E1000_PHY_PAGE_SELECT;
2471 } else {
2472 page_shift = 0;
2473 page_select = BM_PHY_PAGE_SELECT;
2474 }
2475
2476 /* Page is shifted left, PHY expects (page x 32) */
2477 ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
2478 (page << page_shift));
2479 if (ret_val)
2480 goto release;
2481 }
2482
2483 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2484 data);
2485release:
2486 hw->phy.ops.release(hw);
2487 return ret_val;
2488}
2489
2490/**
2491 * e1000e_read_phy_reg_bm2 - Read BM PHY register
2492 * @hw: pointer to the HW structure
2493 * @offset: register offset to be read
2494 * @data: pointer to the read data
2495 *
2496 * Acquires semaphore, if necessary, then reads the PHY register at offset
2497 * and storing the retrieved information in data. Release any acquired
2498 * semaphores before exiting.
2499 **/
2500s32 e1000e_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data)
2501{
2502 s32 ret_val;
2503 u16 page = (u16)(offset >> IGP_PAGE_SHIFT);
2504
2505 ret_val = hw->phy.ops.acquire(hw);
2506 if (ret_val)
2507 return ret_val;
2508
2509 /* Page 800 works differently than the rest so it has its own func */
2510 if (page == BM_WUC_PAGE) {
2511 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2512 true, false);
2513 goto release;
2514 }
2515
2516 hw->phy.addr = 1;
2517
2518 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2519 /* Page is shifted left, PHY expects (page x 32) */
2520 ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
2521 page);
2522
2523 if (ret_val)
2524 goto release;
2525 }
2526
2527 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2528 data);
2529release:
2530 hw->phy.ops.release(hw);
2531 return ret_val;
2532}
2533
2534/**
2535 * e1000e_write_phy_reg_bm2 - Write BM PHY register
2536 * @hw: pointer to the HW structure
2537 * @offset: register offset to write to
2538 * @data: data to write at register offset
2539 *
2540 * Acquires semaphore, if necessary, then writes the data to PHY register
2541 * at the offset. Release any acquired semaphores before exiting.
2542 **/
2543s32 e1000e_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data)
2544{
2545 s32 ret_val;
2546 u16 page = (u16)(offset >> IGP_PAGE_SHIFT);
2547
2548 ret_val = hw->phy.ops.acquire(hw);
2549 if (ret_val)
2550 return ret_val;
2551
2552 /* Page 800 works differently than the rest so it has its own func */
2553 if (page == BM_WUC_PAGE) {
2554 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2555 false, false);
2556 goto release;
2557 }
2558
2559 hw->phy.addr = 1;
2560
2561 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2562 /* Page is shifted left, PHY expects (page x 32) */
2563 ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
2564 page);
2565
2566 if (ret_val)
2567 goto release;
2568 }
2569
2570 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2571 data);
2572
2573release:
2574 hw->phy.ops.release(hw);
2575 return ret_val;
2576}
2577
2578/**
2579 * e1000_enable_phy_wakeup_reg_access_bm - enable access to BM wakeup registers
2580 * @hw: pointer to the HW structure
2581 * @phy_reg: pointer to store original contents of BM_WUC_ENABLE_REG
2582 *
2583 * Assumes semaphore already acquired and phy_reg points to a valid memory
2584 * address to store contents of the BM_WUC_ENABLE_REG register.
2585 **/
2586s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
2587{
2588 s32 ret_val;
2589 u16 temp;
2590
2591 /* All page select, port ctrl and wakeup registers use phy address 1 */
2592 hw->phy.addr = 1;
2593
2594 /* Select Port Control Registers page */
2595 ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
2596 if (ret_val) {
2597 e_dbg("Could not set Port Control page\n");
2598 return ret_val;
2599 }
2600
2601 ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
2602 if (ret_val) {
2603 e_dbg("Could not read PHY register %d.%d\n",
2604 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2605 return ret_val;
2606 }
2607
2608 /* Enable both PHY wakeup mode and Wakeup register page writes.
2609 * Prevent a power state change by disabling ME and Host PHY wakeup.
2610 */
2611 temp = *phy_reg;
2612 temp |= BM_WUC_ENABLE_BIT;
2613 temp &= ~(BM_WUC_ME_WU_BIT | BM_WUC_HOST_WU_BIT);
2614
2615 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, temp);
2616 if (ret_val) {
2617 e_dbg("Could not write PHY register %d.%d\n",
2618 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2619 return ret_val;
2620 }
2621
2622 /* Select Host Wakeup Registers page - caller now able to write
2623 * registers on the Wakeup registers page
2624 */
2625 return e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT));
2626}
2627
2628/**
2629 * e1000_disable_phy_wakeup_reg_access_bm - disable access to BM wakeup regs
2630 * @hw: pointer to the HW structure
2631 * @phy_reg: pointer to original contents of BM_WUC_ENABLE_REG
2632 *
2633 * Restore BM_WUC_ENABLE_REG to its original value.
2634 *
2635 * Assumes semaphore already acquired and *phy_reg is the contents of the
2636 * BM_WUC_ENABLE_REG before register(s) on BM_WUC_PAGE were accessed by
2637 * caller.
2638 **/
2639s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
2640{
2641 s32 ret_val;
2642
2643 /* Select Port Control Registers page */
2644 ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
2645 if (ret_val) {
2646 e_dbg("Could not set Port Control page\n");
2647 return ret_val;
2648 }
2649
2650 /* Restore 769.17 to its original value */
2651 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, *phy_reg);
2652 if (ret_val)
2653 e_dbg("Could not restore PHY register %d.%d\n",
2654 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2655
2656 return ret_val;
2657}
2658
2659/**
2660 * e1000_access_phy_wakeup_reg_bm - Read/write BM PHY wakeup register
2661 * @hw: pointer to the HW structure
2662 * @offset: register offset to be read or written
2663 * @data: pointer to the data to read or write
2664 * @read: determines if operation is read or write
2665 * @page_set: BM_WUC_PAGE already set and access enabled
2666 *
2667 * Read the PHY register at offset and store the retrieved information in
2668 * data, or write data to PHY register at offset. Note the procedure to
2669 * access the PHY wakeup registers is different than reading the other PHY
2670 * registers. It works as such:
2671 * 1) Set 769.17.2 (page 769, register 17, bit 2) = 1
2672 * 2) Set page to 800 for host (801 if we were manageability)
2673 * 3) Write the address using the address opcode (0x11)
2674 * 4) Read or write the data using the data opcode (0x12)
2675 * 5) Restore 769.17.2 to its original value
2676 *
2677 * Steps 1 and 2 are done by e1000_enable_phy_wakeup_reg_access_bm() and
2678 * step 5 is done by e1000_disable_phy_wakeup_reg_access_bm().
2679 *
2680 * Assumes semaphore is already acquired. When page_set==true, assumes
2681 * the PHY page is set to BM_WUC_PAGE (i.e. a function in the call stack
2682 * is responsible for calls to e1000_[enable|disable]_phy_wakeup_reg_bm()).
2683 **/
2684static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
2685 u16 *data, bool read, bool page_set)
2686{
2687 s32 ret_val;
2688 u16 reg = BM_PHY_REG_NUM(offset);
2689 u16 page = BM_PHY_REG_PAGE(offset);
2690 u16 phy_reg = 0;
2691
2692 /* Gig must be disabled for MDIO accesses to Host Wakeup reg page */
2693 if ((hw->mac.type == e1000_pchlan) &&
2694 (!(er32(PHY_CTRL) & E1000_PHY_CTRL_GBE_DISABLE)))
2695 e_dbg("Attempting to access page %d while gig enabled.\n",
2696 page);
2697
2698 if (!page_set) {
2699 /* Enable access to PHY wakeup registers */
2700 ret_val = e1000_enable_phy_wakeup_reg_access_bm(hw, &phy_reg);
2701 if (ret_val) {
2702 e_dbg("Could not enable PHY wakeup reg access\n");
2703 return ret_val;
2704 }
2705 }
2706
2707 e_dbg("Accessing PHY page %d reg 0x%x\n", page, reg);
2708
2709 /* Write the Wakeup register page offset value using opcode 0x11 */
2710 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg);
2711 if (ret_val) {
2712 e_dbg("Could not write address opcode to page %d\n", page);
2713 return ret_val;
2714 }
2715
2716 if (read) {
2717 /* Read the Wakeup register page value using opcode 0x12 */
2718 ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
2719 data);
2720 } else {
2721 /* Write the Wakeup register page value using opcode 0x12 */
2722 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
2723 *data);
2724 }
2725
2726 if (ret_val) {
2727 e_dbg("Could not access PHY reg %d.%d\n", page, reg);
2728 return ret_val;
2729 }
2730
2731 if (!page_set)
2732 ret_val = e1000_disable_phy_wakeup_reg_access_bm(hw, &phy_reg);
2733
2734 return ret_val;
2735}
2736
2737/**
2738 * e1000_power_up_phy_copper - Restore copper link in case of PHY power down
2739 * @hw: pointer to the HW structure
2740 *
2741 * In the case of a PHY power down to save power, or to turn off link during a
2742 * driver unload, or wake on lan is not enabled, restore the link to previous
2743 * settings.
2744 **/
2745void e1000_power_up_phy_copper(struct e1000_hw *hw)
2746{
2747 u16 mii_reg = 0;
2748 int ret;
2749
2750 /* The PHY will retain its settings across a power down/up cycle */
2751 ret = e1e_rphy(hw, MII_BMCR, &mii_reg);
2752 if (ret) {
2753 e_dbg("Error reading PHY register\n");
2754 return;
2755 }
2756 mii_reg &= ~BMCR_PDOWN;
2757 e1e_wphy(hw, MII_BMCR, mii_reg);
2758}
2759
2760/**
2761 * e1000_power_down_phy_copper - Restore copper link in case of PHY power down
2762 * @hw: pointer to the HW structure
2763 *
2764 * In the case of a PHY power down to save power, or to turn off link during a
2765 * driver unload, or wake on lan is not enabled, restore the link to previous
2766 * settings.
2767 **/
2768void e1000_power_down_phy_copper(struct e1000_hw *hw)
2769{
2770 u16 mii_reg = 0;
2771 int ret;
2772
2773 /* The PHY will retain its settings across a power down/up cycle */
2774 ret = e1e_rphy(hw, MII_BMCR, &mii_reg);
2775 if (ret) {
2776 e_dbg("Error reading PHY register\n");
2777 return;
2778 }
2779 mii_reg |= BMCR_PDOWN;
2780 e1e_wphy(hw, MII_BMCR, mii_reg);
2781 usleep_range(1000, 2000);
2782}
2783
2784/**
2785 * __e1000_read_phy_reg_hv - Read HV PHY register
2786 * @hw: pointer to the HW structure
2787 * @offset: register offset to be read
2788 * @data: pointer to the read data
2789 * @locked: semaphore has already been acquired or not
2790 * @page_set: BM_WUC_PAGE already set and access enabled
2791 *
2792 * Acquires semaphore, if necessary, then reads the PHY register at offset
2793 * and stores the retrieved information in data. Release any acquired
2794 * semaphore before exiting.
2795 **/
2796static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data,
2797 bool locked, bool page_set)
2798{
2799 s32 ret_val;
2800 u16 page = BM_PHY_REG_PAGE(offset);
2801 u16 reg = BM_PHY_REG_NUM(offset);
2802 u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);
2803
2804 if (!locked) {
2805 ret_val = hw->phy.ops.acquire(hw);
2806 if (ret_val)
2807 return ret_val;
2808 }
2809
2810 /* Page 800 works differently than the rest so it has its own func */
2811 if (page == BM_WUC_PAGE) {
2812 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2813 true, page_set);
2814 goto out;
2815 }
2816
2817 if (page > 0 && page < HV_INTC_FC_PAGE_START) {
2818 ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
2819 data, true);
2820 goto out;
2821 }
2822
2823 if (!page_set) {
2824 if (page == HV_INTC_FC_PAGE_START)
2825 page = 0;
2826
2827 if (reg > MAX_PHY_MULTI_PAGE_REG) {
2828 /* Page is shifted left, PHY expects (page x 32) */
2829 ret_val = e1000_set_page_igp(hw,
2830 (page << IGP_PAGE_SHIFT));
2831
2832 hw->phy.addr = phy_addr;
2833
2834 if (ret_val)
2835 goto out;
2836 }
2837 }
2838
2839 e_dbg("reading PHY page %d (or 0x%x shifted) reg 0x%x\n", page,
2840 page << IGP_PAGE_SHIFT, reg);
2841
2842 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, data);
2843out:
2844 if (!locked)
2845 hw->phy.ops.release(hw);
2846
2847 return ret_val;
2848}
2849
2850/**
2851 * e1000_read_phy_reg_hv - Read HV PHY register
2852 * @hw: pointer to the HW structure
2853 * @offset: register offset to be read
2854 * @data: pointer to the read data
2855 *
2856 * Acquires semaphore then reads the PHY register at offset and stores
2857 * the retrieved information in data. Release the acquired semaphore
2858 * before exiting.
2859 **/
2860s32 e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data)
2861{
2862 return __e1000_read_phy_reg_hv(hw, offset, data, false, false);
2863}
2864
2865/**
2866 * e1000_read_phy_reg_hv_locked - Read HV PHY register
2867 * @hw: pointer to the HW structure
2868 * @offset: register offset to be read
2869 * @data: pointer to the read data
2870 *
2871 * Reads the PHY register at offset and stores the retrieved information
2872 * in data. Assumes semaphore already acquired.
2873 **/
2874s32 e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data)
2875{
2876 return __e1000_read_phy_reg_hv(hw, offset, data, true, false);
2877}
2878
2879/**
2880 * e1000_read_phy_reg_page_hv - Read HV PHY register
2881 * @hw: pointer to the HW structure
2882 * @offset: register offset to write to
2883 * @data: data to write at register offset
2884 *
2885 * Reads the PHY register at offset and stores the retrieved information
2886 * in data. Assumes semaphore already acquired and page already set.
2887 **/
2888s32 e1000_read_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 *data)
2889{
2890 return __e1000_read_phy_reg_hv(hw, offset, data, true, true);
2891}
2892
2893/**
2894 * __e1000_write_phy_reg_hv - Write HV PHY register
2895 * @hw: pointer to the HW structure
2896 * @offset: register offset to write to
2897 * @data: data to write at register offset
2898 * @locked: semaphore has already been acquired or not
2899 * @page_set: BM_WUC_PAGE already set and access enabled
2900 *
2901 * Acquires semaphore, if necessary, then writes the data to PHY register
2902 * at the offset. Release any acquired semaphores before exiting.
2903 **/
2904static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data,
2905 bool locked, bool page_set)
2906{
2907 s32 ret_val;
2908 u16 page = BM_PHY_REG_PAGE(offset);
2909 u16 reg = BM_PHY_REG_NUM(offset);
2910 u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);
2911
2912 if (!locked) {
2913 ret_val = hw->phy.ops.acquire(hw);
2914 if (ret_val)
2915 return ret_val;
2916 }
2917
2918 /* Page 800 works differently than the rest so it has its own func */
2919 if (page == BM_WUC_PAGE) {
2920 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2921 false, page_set);
2922 goto out;
2923 }
2924
2925 if (page > 0 && page < HV_INTC_FC_PAGE_START) {
2926 ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
2927 &data, false);
2928 goto out;
2929 }
2930
2931 if (!page_set) {
2932 if (page == HV_INTC_FC_PAGE_START)
2933 page = 0;
2934
2935 /* Workaround MDIO accesses being disabled after entering IEEE
2936 * Power Down (when bit 11 of the PHY Control register is set)
2937 */
2938 if ((hw->phy.type == e1000_phy_82578) &&
2939 (hw->phy.revision >= 1) &&
2940 (hw->phy.addr == 2) &&
2941 !(MAX_PHY_REG_ADDRESS & reg) && (data & BIT(11))) {
2942 u16 data2 = 0x7EFF;
2943
2944 ret_val = e1000_access_phy_debug_regs_hv(hw,
2945 BIT(6) | 0x3,
2946 &data2, false);
2947 if (ret_val)
2948 goto out;
2949 }
2950
2951 if (reg > MAX_PHY_MULTI_PAGE_REG) {
2952 /* Page is shifted left, PHY expects (page x 32) */
2953 ret_val = e1000_set_page_igp(hw,
2954 (page << IGP_PAGE_SHIFT));
2955
2956 hw->phy.addr = phy_addr;
2957
2958 if (ret_val)
2959 goto out;
2960 }
2961 }
2962
2963 e_dbg("writing PHY page %d (or 0x%x shifted) reg 0x%x\n", page,
2964 page << IGP_PAGE_SHIFT, reg);
2965
2966 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg,
2967 data);
2968
2969out:
2970 if (!locked)
2971 hw->phy.ops.release(hw);
2972
2973 return ret_val;
2974}
2975
2976/**
2977 * e1000_write_phy_reg_hv - Write HV PHY register
2978 * @hw: pointer to the HW structure
2979 * @offset: register offset to write to
2980 * @data: data to write at register offset
2981 *
2982 * Acquires semaphore then writes the data to PHY register at the offset.
2983 * Release the acquired semaphores before exiting.
2984 **/
2985s32 e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data)
2986{
2987 return __e1000_write_phy_reg_hv(hw, offset, data, false, false);
2988}
2989
2990/**
2991 * e1000_write_phy_reg_hv_locked - Write HV PHY register
2992 * @hw: pointer to the HW structure
2993 * @offset: register offset to write to
2994 * @data: data to write at register offset
2995 *
2996 * Writes the data to PHY register at the offset. Assumes semaphore
2997 * already acquired.
2998 **/
2999s32 e1000_write_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 data)
3000{
3001 return __e1000_write_phy_reg_hv(hw, offset, data, true, false);
3002}
3003
3004/**
3005 * e1000_write_phy_reg_page_hv - Write HV PHY register
3006 * @hw: pointer to the HW structure
3007 * @offset: register offset to write to
3008 * @data: data to write at register offset
3009 *
3010 * Writes the data to PHY register at the offset. Assumes semaphore
3011 * already acquired and page already set.
3012 **/
3013s32 e1000_write_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 data)
3014{
3015 return __e1000_write_phy_reg_hv(hw, offset, data, true, true);
3016}
3017
3018/**
3019 * e1000_get_phy_addr_for_hv_page - Get PHY address based on page
3020 * @page: page to be accessed
3021 **/
3022static u32 e1000_get_phy_addr_for_hv_page(u32 page)
3023{
3024 u32 phy_addr = 2;
3025
3026 if (page >= HV_INTC_FC_PAGE_START)
3027 phy_addr = 1;
3028
3029 return phy_addr;
3030}
3031
3032/**
3033 * e1000_access_phy_debug_regs_hv - Read HV PHY vendor specific high registers
3034 * @hw: pointer to the HW structure
3035 * @offset: register offset to be read or written
3036 * @data: pointer to the data to be read or written
3037 * @read: determines if operation is read or write
3038 *
3039 * Reads the PHY register at offset and stores the retrieved information
3040 * in data. Assumes semaphore already acquired. Note that the procedure
3041 * to access these regs uses the address port and data port to read/write.
3042 * These accesses done with PHY address 2 and without using pages.
3043 **/
3044static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
3045 u16 *data, bool read)
3046{
3047 s32 ret_val;
3048 u32 addr_reg;
3049 u32 data_reg;
3050
3051 /* This takes care of the difference with desktop vs mobile phy */
3052 addr_reg = ((hw->phy.type == e1000_phy_82578) ?
3053 I82578_ADDR_REG : I82577_ADDR_REG);
3054 data_reg = addr_reg + 1;
3055
3056 /* All operations in this function are phy address 2 */
3057 hw->phy.addr = 2;
3058
3059 /* masking with 0x3F to remove the page from offset */
3060 ret_val = e1000e_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F);
3061 if (ret_val) {
3062 e_dbg("Could not write the Address Offset port register\n");
3063 return ret_val;
3064 }
3065
3066 /* Read or write the data value next */
3067 if (read)
3068 ret_val = e1000e_read_phy_reg_mdic(hw, data_reg, data);
3069 else
3070 ret_val = e1000e_write_phy_reg_mdic(hw, data_reg, *data);
3071
3072 if (ret_val)
3073 e_dbg("Could not access the Data port register\n");
3074
3075 return ret_val;
3076}
3077
3078/**
3079 * e1000_link_stall_workaround_hv - Si workaround
3080 * @hw: pointer to the HW structure
3081 *
3082 * This function works around a Si bug where the link partner can get
3083 * a link up indication before the PHY does. If small packets are sent
3084 * by the link partner they can be placed in the packet buffer without
3085 * being properly accounted for by the PHY and will stall preventing
3086 * further packets from being received. The workaround is to clear the
3087 * packet buffer after the PHY detects link up.
3088 **/
3089s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw)
3090{
3091 s32 ret_val = 0;
3092 u16 data;
3093
3094 if (hw->phy.type != e1000_phy_82578)
3095 return 0;
3096
3097 /* Do not apply workaround if in PHY loopback bit 14 set */
3098 ret_val = e1e_rphy(hw, MII_BMCR, &data);
3099 if (ret_val) {
3100 e_dbg("Error reading PHY register\n");
3101 return ret_val;
3102 }
3103 if (data & BMCR_LOOPBACK)
3104 return 0;
3105
3106 /* check if link is up and at 1Gbps */
3107 ret_val = e1e_rphy(hw, BM_CS_STATUS, &data);
3108 if (ret_val)
3109 return ret_val;
3110
3111 data &= (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED |
3112 BM_CS_STATUS_SPEED_MASK);
3113
3114 if (data != (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED |
3115 BM_CS_STATUS_SPEED_1000))
3116 return 0;
3117
3118 msleep(200);
3119
3120 /* flush the packets in the fifo buffer */
3121 ret_val = e1e_wphy(hw, HV_MUX_DATA_CTRL,
3122 (HV_MUX_DATA_CTRL_GEN_TO_MAC |
3123 HV_MUX_DATA_CTRL_FORCE_SPEED));
3124 if (ret_val)
3125 return ret_val;
3126
3127 return e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC);
3128}
3129
3130/**
3131 * e1000_check_polarity_82577 - Checks the polarity.
3132 * @hw: pointer to the HW structure
3133 *
3134 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
3135 *
3136 * Polarity is determined based on the PHY specific status register.
3137 **/
3138s32 e1000_check_polarity_82577(struct e1000_hw *hw)
3139{
3140 struct e1000_phy_info *phy = &hw->phy;
3141 s32 ret_val;
3142 u16 data;
3143
3144 ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
3145
3146 if (!ret_val)
3147 phy->cable_polarity = ((data & I82577_PHY_STATUS2_REV_POLARITY)
3148 ? e1000_rev_polarity_reversed
3149 : e1000_rev_polarity_normal);
3150
3151 return ret_val;
3152}
3153
3154/**
3155 * e1000_phy_force_speed_duplex_82577 - Force speed/duplex for I82577 PHY
3156 * @hw: pointer to the HW structure
3157 *
3158 * Calls the PHY setup function to force speed and duplex.
3159 **/
3160s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
3161{
3162 struct e1000_phy_info *phy = &hw->phy;
3163 s32 ret_val;
3164 u16 phy_data;
3165 bool link;
3166
3167 ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
3168 if (ret_val)
3169 return ret_val;
3170
3171 e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
3172
3173 ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
3174 if (ret_val)
3175 return ret_val;
3176
3177 udelay(1);
3178
3179 if (phy->autoneg_wait_to_complete) {
3180 e_dbg("Waiting for forced speed/duplex link on 82577 phy\n");
3181
3182 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
3183 100000, &link);
3184 if (ret_val)
3185 return ret_val;
3186
3187 if (!link)
3188 e_dbg("Link taking longer than expected.\n");
3189
3190 /* Try once more */
3191 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
3192 100000, &link);
3193 }
3194
3195 return ret_val;
3196}
3197
3198/**
3199 * e1000_get_phy_info_82577 - Retrieve I82577 PHY information
3200 * @hw: pointer to the HW structure
3201 *
3202 * Read PHY status to determine if link is up. If link is up, then
3203 * set/determine 10base-T extended distance and polarity correction. Read
3204 * PHY port status to determine MDI/MDIx and speed. Based on the speed,
3205 * determine on the cable length, local and remote receiver.
3206 **/
3207s32 e1000_get_phy_info_82577(struct e1000_hw *hw)
3208{
3209 struct e1000_phy_info *phy = &hw->phy;
3210 s32 ret_val;
3211 u16 data;
3212 bool link;
3213
3214 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
3215 if (ret_val)
3216 return ret_val;
3217
3218 if (!link) {
3219 e_dbg("Phy info is only valid if link is up\n");
3220 return -E1000_ERR_CONFIG;
3221 }
3222
3223 phy->polarity_correction = true;
3224
3225 ret_val = e1000_check_polarity_82577(hw);
3226 if (ret_val)
3227 return ret_val;
3228
3229 ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
3230 if (ret_val)
3231 return ret_val;
3232
3233 phy->is_mdix = !!(data & I82577_PHY_STATUS2_MDIX);
3234
3235 if ((data & I82577_PHY_STATUS2_SPEED_MASK) ==
3236 I82577_PHY_STATUS2_SPEED_1000MBPS) {
3237 ret_val = hw->phy.ops.get_cable_length(hw);
3238 if (ret_val)
3239 return ret_val;
3240
3241 ret_val = e1e_rphy(hw, MII_STAT1000, &data);
3242 if (ret_val)
3243 return ret_val;
3244
3245 phy->local_rx = (data & LPA_1000LOCALRXOK)
3246 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3247
3248 phy->remote_rx = (data & LPA_1000REMRXOK)
3249 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3250 } else {
3251 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
3252 phy->local_rx = e1000_1000t_rx_status_undefined;
3253 phy->remote_rx = e1000_1000t_rx_status_undefined;
3254 }
3255
3256 return 0;
3257}
3258
3259/**
3260 * e1000_get_cable_length_82577 - Determine cable length for 82577 PHY
3261 * @hw: pointer to the HW structure
3262 *
3263 * Reads the diagnostic status register and verifies result is valid before
3264 * placing it in the phy_cable_length field.
3265 **/
3266s32 e1000_get_cable_length_82577(struct e1000_hw *hw)
3267{
3268 struct e1000_phy_info *phy = &hw->phy;
3269 s32 ret_val;
3270 u16 phy_data, length;
3271
3272 ret_val = e1e_rphy(hw, I82577_PHY_DIAG_STATUS, &phy_data);
3273 if (ret_val)
3274 return ret_val;
3275
3276 length = FIELD_GET(I82577_DSTATUS_CABLE_LENGTH, phy_data);
3277
3278 if (length == E1000_CABLE_LENGTH_UNDEFINED)
3279 return -E1000_ERR_PHY;
3280
3281 phy->cable_length = length;
3282
3283 return 0;
3284}
1/* Intel PRO/1000 Linux driver
2 * Copyright(c) 1999 - 2015 Intel Corporation.
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * The full GNU General Public License is included in this distribution in
14 * the file called "COPYING".
15 *
16 * Contact Information:
17 * Linux NICS <linux.nics@intel.com>
18 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
19 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
20 */
21
22#include "e1000.h"
23
24static s32 e1000_wait_autoneg(struct e1000_hw *hw);
25static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
26 u16 *data, bool read, bool page_set);
27static u32 e1000_get_phy_addr_for_hv_page(u32 page);
28static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
29 u16 *data, bool read);
30
31/* Cable length tables */
32static const u16 e1000_m88_cable_length_table[] = {
33 0, 50, 80, 110, 140, 140, E1000_CABLE_LENGTH_UNDEFINED
34};
35
36#define M88E1000_CABLE_LENGTH_TABLE_SIZE \
37 ARRAY_SIZE(e1000_m88_cable_length_table)
38
39static const u16 e1000_igp_2_cable_length_table[] = {
40 0, 0, 0, 0, 0, 0, 0, 0, 3, 5, 8, 11, 13, 16, 18, 21, 0, 0, 0, 3,
41 6, 10, 13, 16, 19, 23, 26, 29, 32, 35, 38, 41, 6, 10, 14, 18, 22,
42 26, 30, 33, 37, 41, 44, 48, 51, 54, 58, 61, 21, 26, 31, 35, 40,
43 44, 49, 53, 57, 61, 65, 68, 72, 75, 79, 82, 40, 45, 51, 56, 61,
44 66, 70, 75, 79, 83, 87, 91, 94, 98, 101, 104, 60, 66, 72, 77, 82,
45 87, 92, 96, 100, 104, 108, 111, 114, 117, 119, 121, 83, 89, 95,
46 100, 105, 109, 113, 116, 119, 122, 124, 104, 109, 114, 118, 121,
47 124
48};
49
50#define IGP02E1000_CABLE_LENGTH_TABLE_SIZE \
51 ARRAY_SIZE(e1000_igp_2_cable_length_table)
52
53/**
54 * e1000e_check_reset_block_generic - Check if PHY reset is blocked
55 * @hw: pointer to the HW structure
56 *
57 * Read the PHY management control register and check whether a PHY reset
58 * is blocked. If a reset is not blocked return 0, otherwise
59 * return E1000_BLK_PHY_RESET (12).
60 **/
61s32 e1000e_check_reset_block_generic(struct e1000_hw *hw)
62{
63 u32 manc;
64
65 manc = er32(MANC);
66
67 return (manc & E1000_MANC_BLK_PHY_RST_ON_IDE) ? E1000_BLK_PHY_RESET : 0;
68}
69
70/**
71 * e1000e_get_phy_id - Retrieve the PHY ID and revision
72 * @hw: pointer to the HW structure
73 *
74 * Reads the PHY registers and stores the PHY ID and possibly the PHY
75 * revision in the hardware structure.
76 **/
77s32 e1000e_get_phy_id(struct e1000_hw *hw)
78{
79 struct e1000_phy_info *phy = &hw->phy;
80 s32 ret_val = 0;
81 u16 phy_id;
82 u16 retry_count = 0;
83
84 if (!phy->ops.read_reg)
85 return 0;
86
87 while (retry_count < 2) {
88 ret_val = e1e_rphy(hw, MII_PHYSID1, &phy_id);
89 if (ret_val)
90 return ret_val;
91
92 phy->id = (u32)(phy_id << 16);
93 usleep_range(20, 40);
94 ret_val = e1e_rphy(hw, MII_PHYSID2, &phy_id);
95 if (ret_val)
96 return ret_val;
97
98 phy->id |= (u32)(phy_id & PHY_REVISION_MASK);
99 phy->revision = (u32)(phy_id & ~PHY_REVISION_MASK);
100
101 if (phy->id != 0 && phy->id != PHY_REVISION_MASK)
102 return 0;
103
104 retry_count++;
105 }
106
107 return 0;
108}
109
110/**
111 * e1000e_phy_reset_dsp - Reset PHY DSP
112 * @hw: pointer to the HW structure
113 *
114 * Reset the digital signal processor.
115 **/
116s32 e1000e_phy_reset_dsp(struct e1000_hw *hw)
117{
118 s32 ret_val;
119
120 ret_val = e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0xC1);
121 if (ret_val)
122 return ret_val;
123
124 return e1e_wphy(hw, M88E1000_PHY_GEN_CONTROL, 0);
125}
126
127/**
128 * e1000e_read_phy_reg_mdic - Read MDI control register
129 * @hw: pointer to the HW structure
130 * @offset: register offset to be read
131 * @data: pointer to the read data
132 *
133 * Reads the MDI control register in the PHY at offset and stores the
134 * information read to data.
135 **/
136s32 e1000e_read_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 *data)
137{
138 struct e1000_phy_info *phy = &hw->phy;
139 u32 i, mdic = 0;
140
141 if (offset > MAX_PHY_REG_ADDRESS) {
142 e_dbg("PHY Address %d is out of range\n", offset);
143 return -E1000_ERR_PARAM;
144 }
145
146 /* Set up Op-code, Phy Address, and register offset in the MDI
147 * Control register. The MAC will take care of interfacing with the
148 * PHY to retrieve the desired data.
149 */
150 mdic = ((offset << E1000_MDIC_REG_SHIFT) |
151 (phy->addr << E1000_MDIC_PHY_SHIFT) |
152 (E1000_MDIC_OP_READ));
153
154 ew32(MDIC, mdic);
155
156 /* Poll the ready bit to see if the MDI read completed
157 * Increasing the time out as testing showed failures with
158 * the lower time out
159 */
160 for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
161 udelay(50);
162 mdic = er32(MDIC);
163 if (mdic & E1000_MDIC_READY)
164 break;
165 }
166 if (!(mdic & E1000_MDIC_READY)) {
167 e_dbg("MDI Read did not complete\n");
168 return -E1000_ERR_PHY;
169 }
170 if (mdic & E1000_MDIC_ERROR) {
171 e_dbg("MDI Error\n");
172 return -E1000_ERR_PHY;
173 }
174 if (((mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT) != offset) {
175 e_dbg("MDI Read offset error - requested %d, returned %d\n",
176 offset,
177 (mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
178 return -E1000_ERR_PHY;
179 }
180 *data = (u16)mdic;
181
182 /* Allow some time after each MDIC transaction to avoid
183 * reading duplicate data in the next MDIC transaction.
184 */
185 if (hw->mac.type == e1000_pch2lan)
186 udelay(100);
187
188 return 0;
189}
190
191/**
192 * e1000e_write_phy_reg_mdic - Write MDI control register
193 * @hw: pointer to the HW structure
194 * @offset: register offset to write to
195 * @data: data to write to register at offset
196 *
197 * Writes data to MDI control register in the PHY at offset.
198 **/
199s32 e1000e_write_phy_reg_mdic(struct e1000_hw *hw, u32 offset, u16 data)
200{
201 struct e1000_phy_info *phy = &hw->phy;
202 u32 i, mdic = 0;
203
204 if (offset > MAX_PHY_REG_ADDRESS) {
205 e_dbg("PHY Address %d is out of range\n", offset);
206 return -E1000_ERR_PARAM;
207 }
208
209 /* Set up Op-code, Phy Address, and register offset in the MDI
210 * Control register. The MAC will take care of interfacing with the
211 * PHY to retrieve the desired data.
212 */
213 mdic = (((u32)data) |
214 (offset << E1000_MDIC_REG_SHIFT) |
215 (phy->addr << E1000_MDIC_PHY_SHIFT) |
216 (E1000_MDIC_OP_WRITE));
217
218 ew32(MDIC, mdic);
219
220 /* Poll the ready bit to see if the MDI read completed
221 * Increasing the time out as testing showed failures with
222 * the lower time out
223 */
224 for (i = 0; i < (E1000_GEN_POLL_TIMEOUT * 3); i++) {
225 udelay(50);
226 mdic = er32(MDIC);
227 if (mdic & E1000_MDIC_READY)
228 break;
229 }
230 if (!(mdic & E1000_MDIC_READY)) {
231 e_dbg("MDI Write did not complete\n");
232 return -E1000_ERR_PHY;
233 }
234 if (mdic & E1000_MDIC_ERROR) {
235 e_dbg("MDI Error\n");
236 return -E1000_ERR_PHY;
237 }
238 if (((mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT) != offset) {
239 e_dbg("MDI Write offset error - requested %d, returned %d\n",
240 offset,
241 (mdic & E1000_MDIC_REG_MASK) >> E1000_MDIC_REG_SHIFT);
242 return -E1000_ERR_PHY;
243 }
244
245 /* Allow some time after each MDIC transaction to avoid
246 * reading duplicate data in the next MDIC transaction.
247 */
248 if (hw->mac.type == e1000_pch2lan)
249 udelay(100);
250
251 return 0;
252}
253
254/**
255 * e1000e_read_phy_reg_m88 - Read m88 PHY register
256 * @hw: pointer to the HW structure
257 * @offset: register offset to be read
258 * @data: pointer to the read data
259 *
260 * Acquires semaphore, if necessary, then reads the PHY register at offset
261 * and storing the retrieved information in data. Release any acquired
262 * semaphores before exiting.
263 **/
264s32 e1000e_read_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 *data)
265{
266 s32 ret_val;
267
268 ret_val = hw->phy.ops.acquire(hw);
269 if (ret_val)
270 return ret_val;
271
272 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
273 data);
274
275 hw->phy.ops.release(hw);
276
277 return ret_val;
278}
279
280/**
281 * e1000e_write_phy_reg_m88 - Write m88 PHY register
282 * @hw: pointer to the HW structure
283 * @offset: register offset to write to
284 * @data: data to write at register offset
285 *
286 * Acquires semaphore, if necessary, then writes the data to PHY register
287 * at the offset. Release any acquired semaphores before exiting.
288 **/
289s32 e1000e_write_phy_reg_m88(struct e1000_hw *hw, u32 offset, u16 data)
290{
291 s32 ret_val;
292
293 ret_val = hw->phy.ops.acquire(hw);
294 if (ret_val)
295 return ret_val;
296
297 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
298 data);
299
300 hw->phy.ops.release(hw);
301
302 return ret_val;
303}
304
305/**
306 * e1000_set_page_igp - Set page as on IGP-like PHY(s)
307 * @hw: pointer to the HW structure
308 * @page: page to set (shifted left when necessary)
309 *
310 * Sets PHY page required for PHY register access. Assumes semaphore is
311 * already acquired. Note, this function sets phy.addr to 1 so the caller
312 * must set it appropriately (if necessary) after this function returns.
313 **/
314s32 e1000_set_page_igp(struct e1000_hw *hw, u16 page)
315{
316 e_dbg("Setting page 0x%x\n", page);
317
318 hw->phy.addr = 1;
319
320 return e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, page);
321}
322
323/**
324 * __e1000e_read_phy_reg_igp - Read igp PHY register
325 * @hw: pointer to the HW structure
326 * @offset: register offset to be read
327 * @data: pointer to the read data
328 * @locked: semaphore has already been acquired or not
329 *
330 * Acquires semaphore, if necessary, then reads the PHY register at offset
331 * and stores the retrieved information in data. Release any acquired
332 * semaphores before exiting.
333 **/
334static s32 __e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data,
335 bool locked)
336{
337 s32 ret_val = 0;
338
339 if (!locked) {
340 if (!hw->phy.ops.acquire)
341 return 0;
342
343 ret_val = hw->phy.ops.acquire(hw);
344 if (ret_val)
345 return ret_val;
346 }
347
348 if (offset > MAX_PHY_MULTI_PAGE_REG)
349 ret_val = e1000e_write_phy_reg_mdic(hw,
350 IGP01E1000_PHY_PAGE_SELECT,
351 (u16)offset);
352 if (!ret_val)
353 ret_val = e1000e_read_phy_reg_mdic(hw,
354 MAX_PHY_REG_ADDRESS & offset,
355 data);
356 if (!locked)
357 hw->phy.ops.release(hw);
358
359 return ret_val;
360}
361
362/**
363 * e1000e_read_phy_reg_igp - Read igp PHY register
364 * @hw: pointer to the HW structure
365 * @offset: register offset to be read
366 * @data: pointer to the read data
367 *
368 * Acquires semaphore then reads the PHY register at offset and stores the
369 * retrieved information in data.
370 * Release the acquired semaphore before exiting.
371 **/
372s32 e1000e_read_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 *data)
373{
374 return __e1000e_read_phy_reg_igp(hw, offset, data, false);
375}
376
377/**
378 * e1000e_read_phy_reg_igp_locked - Read igp PHY register
379 * @hw: pointer to the HW structure
380 * @offset: register offset to be read
381 * @data: pointer to the read data
382 *
383 * Reads the PHY register at offset and stores the retrieved information
384 * in data. Assumes semaphore already acquired.
385 **/
386s32 e1000e_read_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 *data)
387{
388 return __e1000e_read_phy_reg_igp(hw, offset, data, true);
389}
390
391/**
392 * e1000e_write_phy_reg_igp - Write igp PHY register
393 * @hw: pointer to the HW structure
394 * @offset: register offset to write to
395 * @data: data to write at register offset
396 * @locked: semaphore has already been acquired or not
397 *
398 * Acquires semaphore, if necessary, then writes the data to PHY register
399 * at the offset. Release any acquired semaphores before exiting.
400 **/
401static s32 __e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data,
402 bool locked)
403{
404 s32 ret_val = 0;
405
406 if (!locked) {
407 if (!hw->phy.ops.acquire)
408 return 0;
409
410 ret_val = hw->phy.ops.acquire(hw);
411 if (ret_val)
412 return ret_val;
413 }
414
415 if (offset > MAX_PHY_MULTI_PAGE_REG)
416 ret_val = e1000e_write_phy_reg_mdic(hw,
417 IGP01E1000_PHY_PAGE_SELECT,
418 (u16)offset);
419 if (!ret_val)
420 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS &
421 offset, data);
422 if (!locked)
423 hw->phy.ops.release(hw);
424
425 return ret_val;
426}
427
428/**
429 * e1000e_write_phy_reg_igp - Write igp PHY register
430 * @hw: pointer to the HW structure
431 * @offset: register offset to write to
432 * @data: data to write at register offset
433 *
434 * Acquires semaphore then writes the data to PHY register
435 * at the offset. Release any acquired semaphores before exiting.
436 **/
437s32 e1000e_write_phy_reg_igp(struct e1000_hw *hw, u32 offset, u16 data)
438{
439 return __e1000e_write_phy_reg_igp(hw, offset, data, false);
440}
441
442/**
443 * e1000e_write_phy_reg_igp_locked - Write igp PHY register
444 * @hw: pointer to the HW structure
445 * @offset: register offset to write to
446 * @data: data to write at register offset
447 *
448 * Writes the data to PHY register at the offset.
449 * Assumes semaphore already acquired.
450 **/
451s32 e1000e_write_phy_reg_igp_locked(struct e1000_hw *hw, u32 offset, u16 data)
452{
453 return __e1000e_write_phy_reg_igp(hw, offset, data, true);
454}
455
456/**
457 * __e1000_read_kmrn_reg - Read kumeran register
458 * @hw: pointer to the HW structure
459 * @offset: register offset to be read
460 * @data: pointer to the read data
461 * @locked: semaphore has already been acquired or not
462 *
463 * Acquires semaphore, if necessary. Then reads the PHY register at offset
464 * using the kumeran interface. The information retrieved is stored in data.
465 * Release any acquired semaphores before exiting.
466 **/
467static s32 __e1000_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data,
468 bool locked)
469{
470 u32 kmrnctrlsta;
471
472 if (!locked) {
473 s32 ret_val = 0;
474
475 if (!hw->phy.ops.acquire)
476 return 0;
477
478 ret_val = hw->phy.ops.acquire(hw);
479 if (ret_val)
480 return ret_val;
481 }
482
483 kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
484 E1000_KMRNCTRLSTA_OFFSET) | E1000_KMRNCTRLSTA_REN;
485 ew32(KMRNCTRLSTA, kmrnctrlsta);
486 e1e_flush();
487
488 udelay(2);
489
490 kmrnctrlsta = er32(KMRNCTRLSTA);
491 *data = (u16)kmrnctrlsta;
492
493 if (!locked)
494 hw->phy.ops.release(hw);
495
496 return 0;
497}
498
499/**
500 * e1000e_read_kmrn_reg - Read kumeran register
501 * @hw: pointer to the HW structure
502 * @offset: register offset to be read
503 * @data: pointer to the read data
504 *
505 * Acquires semaphore then reads the PHY register at offset using the
506 * kumeran interface. The information retrieved is stored in data.
507 * Release the acquired semaphore before exiting.
508 **/
509s32 e1000e_read_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 *data)
510{
511 return __e1000_read_kmrn_reg(hw, offset, data, false);
512}
513
514/**
515 * e1000e_read_kmrn_reg_locked - Read kumeran register
516 * @hw: pointer to the HW structure
517 * @offset: register offset to be read
518 * @data: pointer to the read data
519 *
520 * Reads the PHY register at offset using the kumeran interface. The
521 * information retrieved is stored in data.
522 * Assumes semaphore already acquired.
523 **/
524s32 e1000e_read_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 *data)
525{
526 return __e1000_read_kmrn_reg(hw, offset, data, true);
527}
528
529/**
530 * __e1000_write_kmrn_reg - Write kumeran register
531 * @hw: pointer to the HW structure
532 * @offset: register offset to write to
533 * @data: data to write at register offset
534 * @locked: semaphore has already been acquired or not
535 *
536 * Acquires semaphore, if necessary. Then write the data to PHY register
537 * at the offset using the kumeran interface. Release any acquired semaphores
538 * before exiting.
539 **/
540static s32 __e1000_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data,
541 bool locked)
542{
543 u32 kmrnctrlsta;
544
545 if (!locked) {
546 s32 ret_val = 0;
547
548 if (!hw->phy.ops.acquire)
549 return 0;
550
551 ret_val = hw->phy.ops.acquire(hw);
552 if (ret_val)
553 return ret_val;
554 }
555
556 kmrnctrlsta = ((offset << E1000_KMRNCTRLSTA_OFFSET_SHIFT) &
557 E1000_KMRNCTRLSTA_OFFSET) | data;
558 ew32(KMRNCTRLSTA, kmrnctrlsta);
559 e1e_flush();
560
561 udelay(2);
562
563 if (!locked)
564 hw->phy.ops.release(hw);
565
566 return 0;
567}
568
569/**
570 * e1000e_write_kmrn_reg - Write kumeran register
571 * @hw: pointer to the HW structure
572 * @offset: register offset to write to
573 * @data: data to write at register offset
574 *
575 * Acquires semaphore then writes the data to the PHY register at the offset
576 * using the kumeran interface. Release the acquired semaphore before exiting.
577 **/
578s32 e1000e_write_kmrn_reg(struct e1000_hw *hw, u32 offset, u16 data)
579{
580 return __e1000_write_kmrn_reg(hw, offset, data, false);
581}
582
583/**
584 * e1000e_write_kmrn_reg_locked - Write kumeran register
585 * @hw: pointer to the HW structure
586 * @offset: register offset to write to
587 * @data: data to write at register offset
588 *
589 * Write the data to PHY register at the offset using the kumeran interface.
590 * Assumes semaphore already acquired.
591 **/
592s32 e1000e_write_kmrn_reg_locked(struct e1000_hw *hw, u32 offset, u16 data)
593{
594 return __e1000_write_kmrn_reg(hw, offset, data, true);
595}
596
597/**
598 * e1000_set_master_slave_mode - Setup PHY for Master/slave mode
599 * @hw: pointer to the HW structure
600 *
601 * Sets up Master/slave mode
602 **/
603static s32 e1000_set_master_slave_mode(struct e1000_hw *hw)
604{
605 s32 ret_val;
606 u16 phy_data;
607
608 /* Resolve Master/Slave mode */
609 ret_val = e1e_rphy(hw, MII_CTRL1000, &phy_data);
610 if (ret_val)
611 return ret_val;
612
613 /* load defaults for future use */
614 hw->phy.original_ms_type = (phy_data & CTL1000_ENABLE_MASTER) ?
615 ((phy_data & CTL1000_AS_MASTER) ?
616 e1000_ms_force_master : e1000_ms_force_slave) : e1000_ms_auto;
617
618 switch (hw->phy.ms_type) {
619 case e1000_ms_force_master:
620 phy_data |= (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER);
621 break;
622 case e1000_ms_force_slave:
623 phy_data |= CTL1000_ENABLE_MASTER;
624 phy_data &= ~(CTL1000_AS_MASTER);
625 break;
626 case e1000_ms_auto:
627 phy_data &= ~CTL1000_ENABLE_MASTER;
628 /* fall-through */
629 default:
630 break;
631 }
632
633 return e1e_wphy(hw, MII_CTRL1000, phy_data);
634}
635
636/**
637 * e1000_copper_link_setup_82577 - Setup 82577 PHY for copper link
638 * @hw: pointer to the HW structure
639 *
640 * Sets up Carrier-sense on Transmit and downshift values.
641 **/
642s32 e1000_copper_link_setup_82577(struct e1000_hw *hw)
643{
644 s32 ret_val;
645 u16 phy_data;
646
647 /* Enable CRS on Tx. This must be set for half-duplex operation. */
648 ret_val = e1e_rphy(hw, I82577_CFG_REG, &phy_data);
649 if (ret_val)
650 return ret_val;
651
652 phy_data |= I82577_CFG_ASSERT_CRS_ON_TX;
653
654 /* Enable downshift */
655 phy_data |= I82577_CFG_ENABLE_DOWNSHIFT;
656
657 ret_val = e1e_wphy(hw, I82577_CFG_REG, phy_data);
658 if (ret_val)
659 return ret_val;
660
661 /* Set MDI/MDIX mode */
662 ret_val = e1e_rphy(hw, I82577_PHY_CTRL_2, &phy_data);
663 if (ret_val)
664 return ret_val;
665 phy_data &= ~I82577_PHY_CTRL2_MDIX_CFG_MASK;
666 /* Options:
667 * 0 - Auto (default)
668 * 1 - MDI mode
669 * 2 - MDI-X mode
670 */
671 switch (hw->phy.mdix) {
672 case 1:
673 break;
674 case 2:
675 phy_data |= I82577_PHY_CTRL2_MANUAL_MDIX;
676 break;
677 case 0:
678 default:
679 phy_data |= I82577_PHY_CTRL2_AUTO_MDI_MDIX;
680 break;
681 }
682 ret_val = e1e_wphy(hw, I82577_PHY_CTRL_2, phy_data);
683 if (ret_val)
684 return ret_val;
685
686 return e1000_set_master_slave_mode(hw);
687}
688
689/**
690 * e1000e_copper_link_setup_m88 - Setup m88 PHY's for copper link
691 * @hw: pointer to the HW structure
692 *
693 * Sets up MDI/MDI-X and polarity for m88 PHY's. If necessary, transmit clock
694 * and downshift values are set also.
695 **/
696s32 e1000e_copper_link_setup_m88(struct e1000_hw *hw)
697{
698 struct e1000_phy_info *phy = &hw->phy;
699 s32 ret_val;
700 u16 phy_data;
701
702 /* Enable CRS on Tx. This must be set for half-duplex operation. */
703 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
704 if (ret_val)
705 return ret_val;
706
707 /* For BM PHY this bit is downshift enable */
708 if (phy->type != e1000_phy_bm)
709 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
710
711 /* Options:
712 * MDI/MDI-X = 0 (default)
713 * 0 - Auto for all speeds
714 * 1 - MDI mode
715 * 2 - MDI-X mode
716 * 3 - Auto for 1000Base-T only (MDI-X for 10/100Base-T modes)
717 */
718 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
719
720 switch (phy->mdix) {
721 case 1:
722 phy_data |= M88E1000_PSCR_MDI_MANUAL_MODE;
723 break;
724 case 2:
725 phy_data |= M88E1000_PSCR_MDIX_MANUAL_MODE;
726 break;
727 case 3:
728 phy_data |= M88E1000_PSCR_AUTO_X_1000T;
729 break;
730 case 0:
731 default:
732 phy_data |= M88E1000_PSCR_AUTO_X_MODE;
733 break;
734 }
735
736 /* Options:
737 * disable_polarity_correction = 0 (default)
738 * Automatic Correction for Reversed Cable Polarity
739 * 0 - Disabled
740 * 1 - Enabled
741 */
742 phy_data &= ~M88E1000_PSCR_POLARITY_REVERSAL;
743 if (phy->disable_polarity_correction)
744 phy_data |= M88E1000_PSCR_POLARITY_REVERSAL;
745
746 /* Enable downshift on BM (disabled by default) */
747 if (phy->type == e1000_phy_bm) {
748 /* For 82574/82583, first disable then enable downshift */
749 if (phy->id == BME1000_E_PHY_ID_R2) {
750 phy_data &= ~BME1000_PSCR_ENABLE_DOWNSHIFT;
751 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL,
752 phy_data);
753 if (ret_val)
754 return ret_val;
755 /* Commit the changes. */
756 ret_val = phy->ops.commit(hw);
757 if (ret_val) {
758 e_dbg("Error committing the PHY changes\n");
759 return ret_val;
760 }
761 }
762
763 phy_data |= BME1000_PSCR_ENABLE_DOWNSHIFT;
764 }
765
766 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
767 if (ret_val)
768 return ret_val;
769
770 if ((phy->type == e1000_phy_m88) &&
771 (phy->revision < E1000_REVISION_4) &&
772 (phy->id != BME1000_E_PHY_ID_R2)) {
773 /* Force TX_CLK in the Extended PHY Specific Control Register
774 * to 25MHz clock.
775 */
776 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
777 if (ret_val)
778 return ret_val;
779
780 phy_data |= M88E1000_EPSCR_TX_CLK_25;
781
782 if ((phy->revision == 2) && (phy->id == M88E1111_I_PHY_ID)) {
783 /* 82573L PHY - set the downshift counter to 5x. */
784 phy_data &= ~M88EC018_EPSCR_DOWNSHIFT_COUNTER_MASK;
785 phy_data |= M88EC018_EPSCR_DOWNSHIFT_COUNTER_5X;
786 } else {
787 /* Configure Master and Slave downshift values */
788 phy_data &= ~(M88E1000_EPSCR_MASTER_DOWNSHIFT_MASK |
789 M88E1000_EPSCR_SLAVE_DOWNSHIFT_MASK);
790 phy_data |= (M88E1000_EPSCR_MASTER_DOWNSHIFT_1X |
791 M88E1000_EPSCR_SLAVE_DOWNSHIFT_1X);
792 }
793 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
794 if (ret_val)
795 return ret_val;
796 }
797
798 if ((phy->type == e1000_phy_bm) && (phy->id == BME1000_E_PHY_ID_R2)) {
799 /* Set PHY page 0, register 29 to 0x0003 */
800 ret_val = e1e_wphy(hw, 29, 0x0003);
801 if (ret_val)
802 return ret_val;
803
804 /* Set PHY page 0, register 30 to 0x0000 */
805 ret_val = e1e_wphy(hw, 30, 0x0000);
806 if (ret_val)
807 return ret_val;
808 }
809
810 /* Commit the changes. */
811 if (phy->ops.commit) {
812 ret_val = phy->ops.commit(hw);
813 if (ret_val) {
814 e_dbg("Error committing the PHY changes\n");
815 return ret_val;
816 }
817 }
818
819 if (phy->type == e1000_phy_82578) {
820 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
821 if (ret_val)
822 return ret_val;
823
824 /* 82578 PHY - set the downshift count to 1x. */
825 phy_data |= I82578_EPSCR_DOWNSHIFT_ENABLE;
826 phy_data &= ~I82578_EPSCR_DOWNSHIFT_COUNTER_MASK;
827 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
828 if (ret_val)
829 return ret_val;
830 }
831
832 return 0;
833}
834
835/**
836 * e1000e_copper_link_setup_igp - Setup igp PHY's for copper link
837 * @hw: pointer to the HW structure
838 *
839 * Sets up LPLU, MDI/MDI-X, polarity, Smartspeed and Master/Slave config for
840 * igp PHY's.
841 **/
842s32 e1000e_copper_link_setup_igp(struct e1000_hw *hw)
843{
844 struct e1000_phy_info *phy = &hw->phy;
845 s32 ret_val;
846 u16 data;
847
848 ret_val = e1000_phy_hw_reset(hw);
849 if (ret_val) {
850 e_dbg("Error resetting the PHY.\n");
851 return ret_val;
852 }
853
854 /* Wait 100ms for MAC to configure PHY from NVM settings, to avoid
855 * timeout issues when LFS is enabled.
856 */
857 msleep(100);
858
859 /* disable lplu d0 during driver init */
860 if (hw->phy.ops.set_d0_lplu_state) {
861 ret_val = hw->phy.ops.set_d0_lplu_state(hw, false);
862 if (ret_val) {
863 e_dbg("Error Disabling LPLU D0\n");
864 return ret_val;
865 }
866 }
867 /* Configure mdi-mdix settings */
868 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &data);
869 if (ret_val)
870 return ret_val;
871
872 data &= ~IGP01E1000_PSCR_AUTO_MDIX;
873
874 switch (phy->mdix) {
875 case 1:
876 data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
877 break;
878 case 2:
879 data |= IGP01E1000_PSCR_FORCE_MDI_MDIX;
880 break;
881 case 0:
882 default:
883 data |= IGP01E1000_PSCR_AUTO_MDIX;
884 break;
885 }
886 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, data);
887 if (ret_val)
888 return ret_val;
889
890 /* set auto-master slave resolution settings */
891 if (hw->mac.autoneg) {
892 /* when autonegotiation advertisement is only 1000Mbps then we
893 * should disable SmartSpeed and enable Auto MasterSlave
894 * resolution as hardware default.
895 */
896 if (phy->autoneg_advertised == ADVERTISE_1000_FULL) {
897 /* Disable SmartSpeed */
898 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
899 &data);
900 if (ret_val)
901 return ret_val;
902
903 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
904 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
905 data);
906 if (ret_val)
907 return ret_val;
908
909 /* Set auto Master/Slave resolution process */
910 ret_val = e1e_rphy(hw, MII_CTRL1000, &data);
911 if (ret_val)
912 return ret_val;
913
914 data &= ~CTL1000_ENABLE_MASTER;
915 ret_val = e1e_wphy(hw, MII_CTRL1000, data);
916 if (ret_val)
917 return ret_val;
918 }
919
920 ret_val = e1000_set_master_slave_mode(hw);
921 }
922
923 return ret_val;
924}
925
926/**
927 * e1000_phy_setup_autoneg - Configure PHY for auto-negotiation
928 * @hw: pointer to the HW structure
929 *
930 * Reads the MII auto-neg advertisement register and/or the 1000T control
931 * register and if the PHY is already setup for auto-negotiation, then
932 * return successful. Otherwise, setup advertisement and flow control to
933 * the appropriate values for the wanted auto-negotiation.
934 **/
935static s32 e1000_phy_setup_autoneg(struct e1000_hw *hw)
936{
937 struct e1000_phy_info *phy = &hw->phy;
938 s32 ret_val;
939 u16 mii_autoneg_adv_reg;
940 u16 mii_1000t_ctrl_reg = 0;
941
942 phy->autoneg_advertised &= phy->autoneg_mask;
943
944 /* Read the MII Auto-Neg Advertisement Register (Address 4). */
945 ret_val = e1e_rphy(hw, MII_ADVERTISE, &mii_autoneg_adv_reg);
946 if (ret_val)
947 return ret_val;
948
949 if (phy->autoneg_mask & ADVERTISE_1000_FULL) {
950 /* Read the MII 1000Base-T Control Register (Address 9). */
951 ret_val = e1e_rphy(hw, MII_CTRL1000, &mii_1000t_ctrl_reg);
952 if (ret_val)
953 return ret_val;
954 }
955
956 /* Need to parse both autoneg_advertised and fc and set up
957 * the appropriate PHY registers. First we will parse for
958 * autoneg_advertised software override. Since we can advertise
959 * a plethora of combinations, we need to check each bit
960 * individually.
961 */
962
963 /* First we clear all the 10/100 mb speed bits in the Auto-Neg
964 * Advertisement Register (Address 4) and the 1000 mb speed bits in
965 * the 1000Base-T Control Register (Address 9).
966 */
967 mii_autoneg_adv_reg &= ~(ADVERTISE_100FULL |
968 ADVERTISE_100HALF |
969 ADVERTISE_10FULL | ADVERTISE_10HALF);
970 mii_1000t_ctrl_reg &= ~(ADVERTISE_1000HALF | ADVERTISE_1000FULL);
971
972 e_dbg("autoneg_advertised %x\n", phy->autoneg_advertised);
973
974 /* Do we want to advertise 10 Mb Half Duplex? */
975 if (phy->autoneg_advertised & ADVERTISE_10_HALF) {
976 e_dbg("Advertise 10mb Half duplex\n");
977 mii_autoneg_adv_reg |= ADVERTISE_10HALF;
978 }
979
980 /* Do we want to advertise 10 Mb Full Duplex? */
981 if (phy->autoneg_advertised & ADVERTISE_10_FULL) {
982 e_dbg("Advertise 10mb Full duplex\n");
983 mii_autoneg_adv_reg |= ADVERTISE_10FULL;
984 }
985
986 /* Do we want to advertise 100 Mb Half Duplex? */
987 if (phy->autoneg_advertised & ADVERTISE_100_HALF) {
988 e_dbg("Advertise 100mb Half duplex\n");
989 mii_autoneg_adv_reg |= ADVERTISE_100HALF;
990 }
991
992 /* Do we want to advertise 100 Mb Full Duplex? */
993 if (phy->autoneg_advertised & ADVERTISE_100_FULL) {
994 e_dbg("Advertise 100mb Full duplex\n");
995 mii_autoneg_adv_reg |= ADVERTISE_100FULL;
996 }
997
998 /* We do not allow the Phy to advertise 1000 Mb Half Duplex */
999 if (phy->autoneg_advertised & ADVERTISE_1000_HALF)
1000 e_dbg("Advertise 1000mb Half duplex request denied!\n");
1001
1002 /* Do we want to advertise 1000 Mb Full Duplex? */
1003 if (phy->autoneg_advertised & ADVERTISE_1000_FULL) {
1004 e_dbg("Advertise 1000mb Full duplex\n");
1005 mii_1000t_ctrl_reg |= ADVERTISE_1000FULL;
1006 }
1007
1008 /* Check for a software override of the flow control settings, and
1009 * setup the PHY advertisement registers accordingly. If
1010 * auto-negotiation is enabled, then software will have to set the
1011 * "PAUSE" bits to the correct value in the Auto-Negotiation
1012 * Advertisement Register (MII_ADVERTISE) and re-start auto-
1013 * negotiation.
1014 *
1015 * The possible values of the "fc" parameter are:
1016 * 0: Flow control is completely disabled
1017 * 1: Rx flow control is enabled (we can receive pause frames
1018 * but not send pause frames).
1019 * 2: Tx flow control is enabled (we can send pause frames
1020 * but we do not support receiving pause frames).
1021 * 3: Both Rx and Tx flow control (symmetric) are enabled.
1022 * other: No software override. The flow control configuration
1023 * in the EEPROM is used.
1024 */
1025 switch (hw->fc.current_mode) {
1026 case e1000_fc_none:
1027 /* Flow control (Rx & Tx) is completely disabled by a
1028 * software over-ride.
1029 */
1030 mii_autoneg_adv_reg &=
1031 ~(ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1032 break;
1033 case e1000_fc_rx_pause:
1034 /* Rx Flow control is enabled, and Tx Flow control is
1035 * disabled, by a software over-ride.
1036 *
1037 * Since there really isn't a way to advertise that we are
1038 * capable of Rx Pause ONLY, we will advertise that we
1039 * support both symmetric and asymmetric Rx PAUSE. Later
1040 * (in e1000e_config_fc_after_link_up) we will disable the
1041 * hw's ability to send PAUSE frames.
1042 */
1043 mii_autoneg_adv_reg |=
1044 (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1045 break;
1046 case e1000_fc_tx_pause:
1047 /* Tx Flow control is enabled, and Rx Flow control is
1048 * disabled, by a software over-ride.
1049 */
1050 mii_autoneg_adv_reg |= ADVERTISE_PAUSE_ASYM;
1051 mii_autoneg_adv_reg &= ~ADVERTISE_PAUSE_CAP;
1052 break;
1053 case e1000_fc_full:
1054 /* Flow control (both Rx and Tx) is enabled by a software
1055 * over-ride.
1056 */
1057 mii_autoneg_adv_reg |=
1058 (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP);
1059 break;
1060 default:
1061 e_dbg("Flow control param set incorrectly\n");
1062 return -E1000_ERR_CONFIG;
1063 }
1064
1065 ret_val = e1e_wphy(hw, MII_ADVERTISE, mii_autoneg_adv_reg);
1066 if (ret_val)
1067 return ret_val;
1068
1069 e_dbg("Auto-Neg Advertising %x\n", mii_autoneg_adv_reg);
1070
1071 if (phy->autoneg_mask & ADVERTISE_1000_FULL)
1072 ret_val = e1e_wphy(hw, MII_CTRL1000, mii_1000t_ctrl_reg);
1073
1074 return ret_val;
1075}
1076
1077/**
1078 * e1000_copper_link_autoneg - Setup/Enable autoneg for copper link
1079 * @hw: pointer to the HW structure
1080 *
1081 * Performs initial bounds checking on autoneg advertisement parameter, then
1082 * configure to advertise the full capability. Setup the PHY to autoneg
1083 * and restart the negotiation process between the link partner. If
1084 * autoneg_wait_to_complete, then wait for autoneg to complete before exiting.
1085 **/
1086static s32 e1000_copper_link_autoneg(struct e1000_hw *hw)
1087{
1088 struct e1000_phy_info *phy = &hw->phy;
1089 s32 ret_val;
1090 u16 phy_ctrl;
1091
1092 /* Perform some bounds checking on the autoneg advertisement
1093 * parameter.
1094 */
1095 phy->autoneg_advertised &= phy->autoneg_mask;
1096
1097 /* If autoneg_advertised is zero, we assume it was not defaulted
1098 * by the calling code so we set to advertise full capability.
1099 */
1100 if (!phy->autoneg_advertised)
1101 phy->autoneg_advertised = phy->autoneg_mask;
1102
1103 e_dbg("Reconfiguring auto-neg advertisement params\n");
1104 ret_val = e1000_phy_setup_autoneg(hw);
1105 if (ret_val) {
1106 e_dbg("Error Setting up Auto-Negotiation\n");
1107 return ret_val;
1108 }
1109 e_dbg("Restarting Auto-Neg\n");
1110
1111 /* Restart auto-negotiation by setting the Auto Neg Enable bit and
1112 * the Auto Neg Restart bit in the PHY control register.
1113 */
1114 ret_val = e1e_rphy(hw, MII_BMCR, &phy_ctrl);
1115 if (ret_val)
1116 return ret_val;
1117
1118 phy_ctrl |= (BMCR_ANENABLE | BMCR_ANRESTART);
1119 ret_val = e1e_wphy(hw, MII_BMCR, phy_ctrl);
1120 if (ret_val)
1121 return ret_val;
1122
1123 /* Does the user want to wait for Auto-Neg to complete here, or
1124 * check at a later time (for example, callback routine).
1125 */
1126 if (phy->autoneg_wait_to_complete) {
1127 ret_val = e1000_wait_autoneg(hw);
1128 if (ret_val) {
1129 e_dbg("Error while waiting for autoneg to complete\n");
1130 return ret_val;
1131 }
1132 }
1133
1134 hw->mac.get_link_status = true;
1135
1136 return ret_val;
1137}
1138
1139/**
1140 * e1000e_setup_copper_link - Configure copper link settings
1141 * @hw: pointer to the HW structure
1142 *
1143 * Calls the appropriate function to configure the link for auto-neg or forced
1144 * speed and duplex. Then we check for link, once link is established calls
1145 * to configure collision distance and flow control are called. If link is
1146 * not established, we return -E1000_ERR_PHY (-2).
1147 **/
1148s32 e1000e_setup_copper_link(struct e1000_hw *hw)
1149{
1150 s32 ret_val;
1151 bool link;
1152
1153 if (hw->mac.autoneg) {
1154 /* Setup autoneg and flow control advertisement and perform
1155 * autonegotiation.
1156 */
1157 ret_val = e1000_copper_link_autoneg(hw);
1158 if (ret_val)
1159 return ret_val;
1160 } else {
1161 /* PHY will be set to 10H, 10F, 100H or 100F
1162 * depending on user settings.
1163 */
1164 e_dbg("Forcing Speed and Duplex\n");
1165 ret_val = hw->phy.ops.force_speed_duplex(hw);
1166 if (ret_val) {
1167 e_dbg("Error Forcing Speed and Duplex\n");
1168 return ret_val;
1169 }
1170 }
1171
1172 /* Check link status. Wait up to 100 microseconds for link to become
1173 * valid.
1174 */
1175 ret_val = e1000e_phy_has_link_generic(hw, COPPER_LINK_UP_LIMIT, 10,
1176 &link);
1177 if (ret_val)
1178 return ret_val;
1179
1180 if (link) {
1181 e_dbg("Valid link established!!!\n");
1182 hw->mac.ops.config_collision_dist(hw);
1183 ret_val = e1000e_config_fc_after_link_up(hw);
1184 } else {
1185 e_dbg("Unable to establish link!!!\n");
1186 }
1187
1188 return ret_val;
1189}
1190
1191/**
1192 * e1000e_phy_force_speed_duplex_igp - Force speed/duplex for igp PHY
1193 * @hw: pointer to the HW structure
1194 *
1195 * Calls the PHY setup function to force speed and duplex. Clears the
1196 * auto-crossover to force MDI manually. Waits for link and returns
1197 * successful if link up is successful, else -E1000_ERR_PHY (-2).
1198 **/
1199s32 e1000e_phy_force_speed_duplex_igp(struct e1000_hw *hw)
1200{
1201 struct e1000_phy_info *phy = &hw->phy;
1202 s32 ret_val;
1203 u16 phy_data;
1204 bool link;
1205
1206 ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
1207 if (ret_val)
1208 return ret_val;
1209
1210 e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
1211
1212 ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
1213 if (ret_val)
1214 return ret_val;
1215
1216 /* Clear Auto-Crossover to force MDI manually. IGP requires MDI
1217 * forced whenever speed and duplex are forced.
1218 */
1219 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CTRL, &phy_data);
1220 if (ret_val)
1221 return ret_val;
1222
1223 phy_data &= ~IGP01E1000_PSCR_AUTO_MDIX;
1224 phy_data &= ~IGP01E1000_PSCR_FORCE_MDI_MDIX;
1225
1226 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CTRL, phy_data);
1227 if (ret_val)
1228 return ret_val;
1229
1230 e_dbg("IGP PSCR: %X\n", phy_data);
1231
1232 udelay(1);
1233
1234 if (phy->autoneg_wait_to_complete) {
1235 e_dbg("Waiting for forced speed/duplex link on IGP phy.\n");
1236
1237 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1238 100000, &link);
1239 if (ret_val)
1240 return ret_val;
1241
1242 if (!link)
1243 e_dbg("Link taking longer than expected.\n");
1244
1245 /* Try once more */
1246 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1247 100000, &link);
1248 }
1249
1250 return ret_val;
1251}
1252
1253/**
1254 * e1000e_phy_force_speed_duplex_m88 - Force speed/duplex for m88 PHY
1255 * @hw: pointer to the HW structure
1256 *
1257 * Calls the PHY setup function to force speed and duplex. Clears the
1258 * auto-crossover to force MDI manually. Resets the PHY to commit the
1259 * changes. If time expires while waiting for link up, we reset the DSP.
1260 * After reset, TX_CLK and CRS on Tx must be set. Return successful upon
1261 * successful completion, else return corresponding error code.
1262 **/
1263s32 e1000e_phy_force_speed_duplex_m88(struct e1000_hw *hw)
1264{
1265 struct e1000_phy_info *phy = &hw->phy;
1266 s32 ret_val;
1267 u16 phy_data;
1268 bool link;
1269
1270 /* Clear Auto-Crossover to force MDI manually. M88E1000 requires MDI
1271 * forced whenever speed and duplex are forced.
1272 */
1273 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1274 if (ret_val)
1275 return ret_val;
1276
1277 phy_data &= ~M88E1000_PSCR_AUTO_X_MODE;
1278 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1279 if (ret_val)
1280 return ret_val;
1281
1282 e_dbg("M88E1000 PSCR: %X\n", phy_data);
1283
1284 ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
1285 if (ret_val)
1286 return ret_val;
1287
1288 e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
1289
1290 ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
1291 if (ret_val)
1292 return ret_val;
1293
1294 /* Reset the phy to commit changes. */
1295 if (hw->phy.ops.commit) {
1296 ret_val = hw->phy.ops.commit(hw);
1297 if (ret_val)
1298 return ret_val;
1299 }
1300
1301 if (phy->autoneg_wait_to_complete) {
1302 e_dbg("Waiting for forced speed/duplex link on M88 phy.\n");
1303
1304 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1305 100000, &link);
1306 if (ret_val)
1307 return ret_val;
1308
1309 if (!link) {
1310 if (hw->phy.type != e1000_phy_m88) {
1311 e_dbg("Link taking longer than expected.\n");
1312 } else {
1313 /* We didn't get link.
1314 * Reset the DSP and cross our fingers.
1315 */
1316 ret_val = e1e_wphy(hw, M88E1000_PHY_PAGE_SELECT,
1317 0x001d);
1318 if (ret_val)
1319 return ret_val;
1320 ret_val = e1000e_phy_reset_dsp(hw);
1321 if (ret_val)
1322 return ret_val;
1323 }
1324 }
1325
1326 /* Try once more */
1327 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1328 100000, &link);
1329 if (ret_val)
1330 return ret_val;
1331 }
1332
1333 if (hw->phy.type != e1000_phy_m88)
1334 return 0;
1335
1336 ret_val = e1e_rphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, &phy_data);
1337 if (ret_val)
1338 return ret_val;
1339
1340 /* Resetting the phy means we need to re-force TX_CLK in the
1341 * Extended PHY Specific Control Register to 25MHz clock from
1342 * the reset value of 2.5MHz.
1343 */
1344 phy_data |= M88E1000_EPSCR_TX_CLK_25;
1345 ret_val = e1e_wphy(hw, M88E1000_EXT_PHY_SPEC_CTRL, phy_data);
1346 if (ret_val)
1347 return ret_val;
1348
1349 /* In addition, we must re-enable CRS on Tx for both half and full
1350 * duplex.
1351 */
1352 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1353 if (ret_val)
1354 return ret_val;
1355
1356 phy_data |= M88E1000_PSCR_ASSERT_CRS_ON_TX;
1357 ret_val = e1e_wphy(hw, M88E1000_PHY_SPEC_CTRL, phy_data);
1358
1359 return ret_val;
1360}
1361
1362/**
1363 * e1000_phy_force_speed_duplex_ife - Force PHY speed & duplex
1364 * @hw: pointer to the HW structure
1365 *
1366 * Forces the speed and duplex settings of the PHY.
1367 * This is a function pointer entry point only called by
1368 * PHY setup routines.
1369 **/
1370s32 e1000_phy_force_speed_duplex_ife(struct e1000_hw *hw)
1371{
1372 struct e1000_phy_info *phy = &hw->phy;
1373 s32 ret_val;
1374 u16 data;
1375 bool link;
1376
1377 ret_val = e1e_rphy(hw, MII_BMCR, &data);
1378 if (ret_val)
1379 return ret_val;
1380
1381 e1000e_phy_force_speed_duplex_setup(hw, &data);
1382
1383 ret_val = e1e_wphy(hw, MII_BMCR, data);
1384 if (ret_val)
1385 return ret_val;
1386
1387 /* Disable MDI-X support for 10/100 */
1388 ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
1389 if (ret_val)
1390 return ret_val;
1391
1392 data &= ~IFE_PMC_AUTO_MDIX;
1393 data &= ~IFE_PMC_FORCE_MDIX;
1394
1395 ret_val = e1e_wphy(hw, IFE_PHY_MDIX_CONTROL, data);
1396 if (ret_val)
1397 return ret_val;
1398
1399 e_dbg("IFE PMC: %X\n", data);
1400
1401 udelay(1);
1402
1403 if (phy->autoneg_wait_to_complete) {
1404 e_dbg("Waiting for forced speed/duplex link on IFE phy.\n");
1405
1406 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1407 100000, &link);
1408 if (ret_val)
1409 return ret_val;
1410
1411 if (!link)
1412 e_dbg("Link taking longer than expected.\n");
1413
1414 /* Try once more */
1415 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
1416 100000, &link);
1417 if (ret_val)
1418 return ret_val;
1419 }
1420
1421 return 0;
1422}
1423
1424/**
1425 * e1000e_phy_force_speed_duplex_setup - Configure forced PHY speed/duplex
1426 * @hw: pointer to the HW structure
1427 * @phy_ctrl: pointer to current value of MII_BMCR
1428 *
1429 * Forces speed and duplex on the PHY by doing the following: disable flow
1430 * control, force speed/duplex on the MAC, disable auto speed detection,
1431 * disable auto-negotiation, configure duplex, configure speed, configure
1432 * the collision distance, write configuration to CTRL register. The
1433 * caller must write to the MII_BMCR register for these settings to
1434 * take affect.
1435 **/
1436void e1000e_phy_force_speed_duplex_setup(struct e1000_hw *hw, u16 *phy_ctrl)
1437{
1438 struct e1000_mac_info *mac = &hw->mac;
1439 u32 ctrl;
1440
1441 /* Turn off flow control when forcing speed/duplex */
1442 hw->fc.current_mode = e1000_fc_none;
1443
1444 /* Force speed/duplex on the mac */
1445 ctrl = er32(CTRL);
1446 ctrl |= (E1000_CTRL_FRCSPD | E1000_CTRL_FRCDPX);
1447 ctrl &= ~E1000_CTRL_SPD_SEL;
1448
1449 /* Disable Auto Speed Detection */
1450 ctrl &= ~E1000_CTRL_ASDE;
1451
1452 /* Disable autoneg on the phy */
1453 *phy_ctrl &= ~BMCR_ANENABLE;
1454
1455 /* Forcing Full or Half Duplex? */
1456 if (mac->forced_speed_duplex & E1000_ALL_HALF_DUPLEX) {
1457 ctrl &= ~E1000_CTRL_FD;
1458 *phy_ctrl &= ~BMCR_FULLDPLX;
1459 e_dbg("Half Duplex\n");
1460 } else {
1461 ctrl |= E1000_CTRL_FD;
1462 *phy_ctrl |= BMCR_FULLDPLX;
1463 e_dbg("Full Duplex\n");
1464 }
1465
1466 /* Forcing 10mb or 100mb? */
1467 if (mac->forced_speed_duplex & E1000_ALL_100_SPEED) {
1468 ctrl |= E1000_CTRL_SPD_100;
1469 *phy_ctrl |= BMCR_SPEED100;
1470 *phy_ctrl &= ~BMCR_SPEED1000;
1471 e_dbg("Forcing 100mb\n");
1472 } else {
1473 ctrl &= ~(E1000_CTRL_SPD_1000 | E1000_CTRL_SPD_100);
1474 *phy_ctrl &= ~(BMCR_SPEED1000 | BMCR_SPEED100);
1475 e_dbg("Forcing 10mb\n");
1476 }
1477
1478 hw->mac.ops.config_collision_dist(hw);
1479
1480 ew32(CTRL, ctrl);
1481}
1482
1483/**
1484 * e1000e_set_d3_lplu_state - Sets low power link up state for D3
1485 * @hw: pointer to the HW structure
1486 * @active: boolean used to enable/disable lplu
1487 *
1488 * Success returns 0, Failure returns 1
1489 *
1490 * The low power link up (lplu) state is set to the power management level D3
1491 * and SmartSpeed is disabled when active is true, else clear lplu for D3
1492 * and enable Smartspeed. LPLU and Smartspeed are mutually exclusive. LPLU
1493 * is used during Dx states where the power conservation is most important.
1494 * During driver activity, SmartSpeed should be enabled so performance is
1495 * maintained.
1496 **/
1497s32 e1000e_set_d3_lplu_state(struct e1000_hw *hw, bool active)
1498{
1499 struct e1000_phy_info *phy = &hw->phy;
1500 s32 ret_val;
1501 u16 data;
1502
1503 ret_val = e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &data);
1504 if (ret_val)
1505 return ret_val;
1506
1507 if (!active) {
1508 data &= ~IGP02E1000_PM_D3_LPLU;
1509 ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
1510 if (ret_val)
1511 return ret_val;
1512 /* LPLU and SmartSpeed are mutually exclusive. LPLU is used
1513 * during Dx states where the power conservation is most
1514 * important. During driver activity we should enable
1515 * SmartSpeed, so performance is maintained.
1516 */
1517 if (phy->smart_speed == e1000_smart_speed_on) {
1518 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1519 &data);
1520 if (ret_val)
1521 return ret_val;
1522
1523 data |= IGP01E1000_PSCFR_SMART_SPEED;
1524 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1525 data);
1526 if (ret_val)
1527 return ret_val;
1528 } else if (phy->smart_speed == e1000_smart_speed_off) {
1529 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1530 &data);
1531 if (ret_val)
1532 return ret_val;
1533
1534 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1535 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG,
1536 data);
1537 if (ret_val)
1538 return ret_val;
1539 }
1540 } else if ((phy->autoneg_advertised == E1000_ALL_SPEED_DUPLEX) ||
1541 (phy->autoneg_advertised == E1000_ALL_NOT_GIG) ||
1542 (phy->autoneg_advertised == E1000_ALL_10_SPEED)) {
1543 data |= IGP02E1000_PM_D3_LPLU;
1544 ret_val = e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, data);
1545 if (ret_val)
1546 return ret_val;
1547
1548 /* When LPLU is enabled, we should disable SmartSpeed */
1549 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_CONFIG, &data);
1550 if (ret_val)
1551 return ret_val;
1552
1553 data &= ~IGP01E1000_PSCFR_SMART_SPEED;
1554 ret_val = e1e_wphy(hw, IGP01E1000_PHY_PORT_CONFIG, data);
1555 }
1556
1557 return ret_val;
1558}
1559
1560/**
1561 * e1000e_check_downshift - Checks whether a downshift in speed occurred
1562 * @hw: pointer to the HW structure
1563 *
1564 * Success returns 0, Failure returns 1
1565 *
1566 * A downshift is detected by querying the PHY link health.
1567 **/
1568s32 e1000e_check_downshift(struct e1000_hw *hw)
1569{
1570 struct e1000_phy_info *phy = &hw->phy;
1571 s32 ret_val;
1572 u16 phy_data, offset, mask;
1573
1574 switch (phy->type) {
1575 case e1000_phy_m88:
1576 case e1000_phy_gg82563:
1577 case e1000_phy_bm:
1578 case e1000_phy_82578:
1579 offset = M88E1000_PHY_SPEC_STATUS;
1580 mask = M88E1000_PSSR_DOWNSHIFT;
1581 break;
1582 case e1000_phy_igp_2:
1583 case e1000_phy_igp_3:
1584 offset = IGP01E1000_PHY_LINK_HEALTH;
1585 mask = IGP01E1000_PLHR_SS_DOWNGRADE;
1586 break;
1587 default:
1588 /* speed downshift not supported */
1589 phy->speed_downgraded = false;
1590 return 0;
1591 }
1592
1593 ret_val = e1e_rphy(hw, offset, &phy_data);
1594
1595 if (!ret_val)
1596 phy->speed_downgraded = !!(phy_data & mask);
1597
1598 return ret_val;
1599}
1600
1601/**
1602 * e1000_check_polarity_m88 - Checks the polarity.
1603 * @hw: pointer to the HW structure
1604 *
1605 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
1606 *
1607 * Polarity is determined based on the PHY specific status register.
1608 **/
1609s32 e1000_check_polarity_m88(struct e1000_hw *hw)
1610{
1611 struct e1000_phy_info *phy = &hw->phy;
1612 s32 ret_val;
1613 u16 data;
1614
1615 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &data);
1616
1617 if (!ret_val)
1618 phy->cable_polarity = ((data & M88E1000_PSSR_REV_POLARITY)
1619 ? e1000_rev_polarity_reversed
1620 : e1000_rev_polarity_normal);
1621
1622 return ret_val;
1623}
1624
1625/**
1626 * e1000_check_polarity_igp - Checks the polarity.
1627 * @hw: pointer to the HW structure
1628 *
1629 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
1630 *
1631 * Polarity is determined based on the PHY port status register, and the
1632 * current speed (since there is no polarity at 100Mbps).
1633 **/
1634s32 e1000_check_polarity_igp(struct e1000_hw *hw)
1635{
1636 struct e1000_phy_info *phy = &hw->phy;
1637 s32 ret_val;
1638 u16 data, offset, mask;
1639
1640 /* Polarity is determined based on the speed of
1641 * our connection.
1642 */
1643 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data);
1644 if (ret_val)
1645 return ret_val;
1646
1647 if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
1648 IGP01E1000_PSSR_SPEED_1000MBPS) {
1649 offset = IGP01E1000_PHY_PCS_INIT_REG;
1650 mask = IGP01E1000_PHY_POLARITY_MASK;
1651 } else {
1652 /* This really only applies to 10Mbps since
1653 * there is no polarity for 100Mbps (always 0).
1654 */
1655 offset = IGP01E1000_PHY_PORT_STATUS;
1656 mask = IGP01E1000_PSSR_POLARITY_REVERSED;
1657 }
1658
1659 ret_val = e1e_rphy(hw, offset, &data);
1660
1661 if (!ret_val)
1662 phy->cable_polarity = ((data & mask)
1663 ? e1000_rev_polarity_reversed
1664 : e1000_rev_polarity_normal);
1665
1666 return ret_val;
1667}
1668
1669/**
1670 * e1000_check_polarity_ife - Check cable polarity for IFE PHY
1671 * @hw: pointer to the HW structure
1672 *
1673 * Polarity is determined on the polarity reversal feature being enabled.
1674 **/
1675s32 e1000_check_polarity_ife(struct e1000_hw *hw)
1676{
1677 struct e1000_phy_info *phy = &hw->phy;
1678 s32 ret_val;
1679 u16 phy_data, offset, mask;
1680
1681 /* Polarity is determined based on the reversal feature being enabled.
1682 */
1683 if (phy->polarity_correction) {
1684 offset = IFE_PHY_EXTENDED_STATUS_CONTROL;
1685 mask = IFE_PESC_POLARITY_REVERSED;
1686 } else {
1687 offset = IFE_PHY_SPECIAL_CONTROL;
1688 mask = IFE_PSC_FORCE_POLARITY;
1689 }
1690
1691 ret_val = e1e_rphy(hw, offset, &phy_data);
1692
1693 if (!ret_val)
1694 phy->cable_polarity = ((phy_data & mask)
1695 ? e1000_rev_polarity_reversed
1696 : e1000_rev_polarity_normal);
1697
1698 return ret_val;
1699}
1700
1701/**
1702 * e1000_wait_autoneg - Wait for auto-neg completion
1703 * @hw: pointer to the HW structure
1704 *
1705 * Waits for auto-negotiation to complete or for the auto-negotiation time
1706 * limit to expire, which ever happens first.
1707 **/
1708static s32 e1000_wait_autoneg(struct e1000_hw *hw)
1709{
1710 s32 ret_val = 0;
1711 u16 i, phy_status;
1712
1713 /* Break after autoneg completes or PHY_AUTO_NEG_LIMIT expires. */
1714 for (i = PHY_AUTO_NEG_LIMIT; i > 0; i--) {
1715 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1716 if (ret_val)
1717 break;
1718 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1719 if (ret_val)
1720 break;
1721 if (phy_status & BMSR_ANEGCOMPLETE)
1722 break;
1723 msleep(100);
1724 }
1725
1726 /* PHY_AUTO_NEG_TIME expiration doesn't guarantee auto-negotiation
1727 * has completed.
1728 */
1729 return ret_val;
1730}
1731
1732/**
1733 * e1000e_phy_has_link_generic - Polls PHY for link
1734 * @hw: pointer to the HW structure
1735 * @iterations: number of times to poll for link
1736 * @usec_interval: delay between polling attempts
1737 * @success: pointer to whether polling was successful or not
1738 *
1739 * Polls the PHY status register for link, 'iterations' number of times.
1740 **/
1741s32 e1000e_phy_has_link_generic(struct e1000_hw *hw, u32 iterations,
1742 u32 usec_interval, bool *success)
1743{
1744 s32 ret_val = 0;
1745 u16 i, phy_status;
1746
1747 for (i = 0; i < iterations; i++) {
1748 /* Some PHYs require the MII_BMSR register to be read
1749 * twice due to the link bit being sticky. No harm doing
1750 * it across the board.
1751 */
1752 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1753 if (ret_val) {
1754 /* If the first read fails, another entity may have
1755 * ownership of the resources, wait and try again to
1756 * see if they have relinquished the resources yet.
1757 */
1758 if (usec_interval >= 1000)
1759 msleep(usec_interval / 1000);
1760 else
1761 udelay(usec_interval);
1762 }
1763 ret_val = e1e_rphy(hw, MII_BMSR, &phy_status);
1764 if (ret_val)
1765 break;
1766 if (phy_status & BMSR_LSTATUS)
1767 break;
1768 if (usec_interval >= 1000)
1769 msleep(usec_interval / 1000);
1770 else
1771 udelay(usec_interval);
1772 }
1773
1774 *success = (i < iterations);
1775
1776 return ret_val;
1777}
1778
1779/**
1780 * e1000e_get_cable_length_m88 - Determine cable length for m88 PHY
1781 * @hw: pointer to the HW structure
1782 *
1783 * Reads the PHY specific status register to retrieve the cable length
1784 * information. The cable length is determined by averaging the minimum and
1785 * maximum values to get the "average" cable length. The m88 PHY has four
1786 * possible cable length values, which are:
1787 * Register Value Cable Length
1788 * 0 < 50 meters
1789 * 1 50 - 80 meters
1790 * 2 80 - 110 meters
1791 * 3 110 - 140 meters
1792 * 4 > 140 meters
1793 **/
1794s32 e1000e_get_cable_length_m88(struct e1000_hw *hw)
1795{
1796 struct e1000_phy_info *phy = &hw->phy;
1797 s32 ret_val;
1798 u16 phy_data, index;
1799
1800 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1801 if (ret_val)
1802 return ret_val;
1803
1804 index = ((phy_data & M88E1000_PSSR_CABLE_LENGTH) >>
1805 M88E1000_PSSR_CABLE_LENGTH_SHIFT);
1806
1807 if (index >= M88E1000_CABLE_LENGTH_TABLE_SIZE - 1)
1808 return -E1000_ERR_PHY;
1809
1810 phy->min_cable_length = e1000_m88_cable_length_table[index];
1811 phy->max_cable_length = e1000_m88_cable_length_table[index + 1];
1812
1813 phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
1814
1815 return 0;
1816}
1817
1818/**
1819 * e1000e_get_cable_length_igp_2 - Determine cable length for igp2 PHY
1820 * @hw: pointer to the HW structure
1821 *
1822 * The automatic gain control (agc) normalizes the amplitude of the
1823 * received signal, adjusting for the attenuation produced by the
1824 * cable. By reading the AGC registers, which represent the
1825 * combination of coarse and fine gain value, the value can be put
1826 * into a lookup table to obtain the approximate cable length
1827 * for each channel.
1828 **/
1829s32 e1000e_get_cable_length_igp_2(struct e1000_hw *hw)
1830{
1831 struct e1000_phy_info *phy = &hw->phy;
1832 s32 ret_val;
1833 u16 phy_data, i, agc_value = 0;
1834 u16 cur_agc_index, max_agc_index = 0;
1835 u16 min_agc_index = IGP02E1000_CABLE_LENGTH_TABLE_SIZE - 1;
1836 static const u16 agc_reg_array[IGP02E1000_PHY_CHANNEL_NUM] = {
1837 IGP02E1000_PHY_AGC_A,
1838 IGP02E1000_PHY_AGC_B,
1839 IGP02E1000_PHY_AGC_C,
1840 IGP02E1000_PHY_AGC_D
1841 };
1842
1843 /* Read the AGC registers for all channels */
1844 for (i = 0; i < IGP02E1000_PHY_CHANNEL_NUM; i++) {
1845 ret_val = e1e_rphy(hw, agc_reg_array[i], &phy_data);
1846 if (ret_val)
1847 return ret_val;
1848
1849 /* Getting bits 15:9, which represent the combination of
1850 * coarse and fine gain values. The result is a number
1851 * that can be put into the lookup table to obtain the
1852 * approximate cable length.
1853 */
1854 cur_agc_index = ((phy_data >> IGP02E1000_AGC_LENGTH_SHIFT) &
1855 IGP02E1000_AGC_LENGTH_MASK);
1856
1857 /* Array index bound check. */
1858 if ((cur_agc_index >= IGP02E1000_CABLE_LENGTH_TABLE_SIZE) ||
1859 (cur_agc_index == 0))
1860 return -E1000_ERR_PHY;
1861
1862 /* Remove min & max AGC values from calculation. */
1863 if (e1000_igp_2_cable_length_table[min_agc_index] >
1864 e1000_igp_2_cable_length_table[cur_agc_index])
1865 min_agc_index = cur_agc_index;
1866 if (e1000_igp_2_cable_length_table[max_agc_index] <
1867 e1000_igp_2_cable_length_table[cur_agc_index])
1868 max_agc_index = cur_agc_index;
1869
1870 agc_value += e1000_igp_2_cable_length_table[cur_agc_index];
1871 }
1872
1873 agc_value -= (e1000_igp_2_cable_length_table[min_agc_index] +
1874 e1000_igp_2_cable_length_table[max_agc_index]);
1875 agc_value /= (IGP02E1000_PHY_CHANNEL_NUM - 2);
1876
1877 /* Calculate cable length with the error range of +/- 10 meters. */
1878 phy->min_cable_length = (((agc_value - IGP02E1000_AGC_RANGE) > 0) ?
1879 (agc_value - IGP02E1000_AGC_RANGE) : 0);
1880 phy->max_cable_length = agc_value + IGP02E1000_AGC_RANGE;
1881
1882 phy->cable_length = (phy->min_cable_length + phy->max_cable_length) / 2;
1883
1884 return 0;
1885}
1886
1887/**
1888 * e1000e_get_phy_info_m88 - Retrieve PHY information
1889 * @hw: pointer to the HW structure
1890 *
1891 * Valid for only copper links. Read the PHY status register (sticky read)
1892 * to verify that link is up. Read the PHY special control register to
1893 * determine the polarity and 10base-T extended distance. Read the PHY
1894 * special status register to determine MDI/MDIx and current speed. If
1895 * speed is 1000, then determine cable length, local and remote receiver.
1896 **/
1897s32 e1000e_get_phy_info_m88(struct e1000_hw *hw)
1898{
1899 struct e1000_phy_info *phy = &hw->phy;
1900 s32 ret_val;
1901 u16 phy_data;
1902 bool link;
1903
1904 if (phy->media_type != e1000_media_type_copper) {
1905 e_dbg("Phy info is only valid for copper media\n");
1906 return -E1000_ERR_CONFIG;
1907 }
1908
1909 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
1910 if (ret_val)
1911 return ret_val;
1912
1913 if (!link) {
1914 e_dbg("Phy info is only valid if link is up\n");
1915 return -E1000_ERR_CONFIG;
1916 }
1917
1918 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_CTRL, &phy_data);
1919 if (ret_val)
1920 return ret_val;
1921
1922 phy->polarity_correction = !!(phy_data &
1923 M88E1000_PSCR_POLARITY_REVERSAL);
1924
1925 ret_val = e1000_check_polarity_m88(hw);
1926 if (ret_val)
1927 return ret_val;
1928
1929 ret_val = e1e_rphy(hw, M88E1000_PHY_SPEC_STATUS, &phy_data);
1930 if (ret_val)
1931 return ret_val;
1932
1933 phy->is_mdix = !!(phy_data & M88E1000_PSSR_MDIX);
1934
1935 if ((phy_data & M88E1000_PSSR_SPEED) == M88E1000_PSSR_1000MBS) {
1936 ret_val = hw->phy.ops.get_cable_length(hw);
1937 if (ret_val)
1938 return ret_val;
1939
1940 ret_val = e1e_rphy(hw, MII_STAT1000, &phy_data);
1941 if (ret_val)
1942 return ret_val;
1943
1944 phy->local_rx = (phy_data & LPA_1000LOCALRXOK)
1945 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1946
1947 phy->remote_rx = (phy_data & LPA_1000REMRXOK)
1948 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
1949 } else {
1950 /* Set values to "undefined" */
1951 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
1952 phy->local_rx = e1000_1000t_rx_status_undefined;
1953 phy->remote_rx = e1000_1000t_rx_status_undefined;
1954 }
1955
1956 return ret_val;
1957}
1958
1959/**
1960 * e1000e_get_phy_info_igp - Retrieve igp PHY information
1961 * @hw: pointer to the HW structure
1962 *
1963 * Read PHY status to determine if link is up. If link is up, then
1964 * set/determine 10base-T extended distance and polarity correction. Read
1965 * PHY port status to determine MDI/MDIx and speed. Based on the speed,
1966 * determine on the cable length, local and remote receiver.
1967 **/
1968s32 e1000e_get_phy_info_igp(struct e1000_hw *hw)
1969{
1970 struct e1000_phy_info *phy = &hw->phy;
1971 s32 ret_val;
1972 u16 data;
1973 bool link;
1974
1975 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
1976 if (ret_val)
1977 return ret_val;
1978
1979 if (!link) {
1980 e_dbg("Phy info is only valid if link is up\n");
1981 return -E1000_ERR_CONFIG;
1982 }
1983
1984 phy->polarity_correction = true;
1985
1986 ret_val = e1000_check_polarity_igp(hw);
1987 if (ret_val)
1988 return ret_val;
1989
1990 ret_val = e1e_rphy(hw, IGP01E1000_PHY_PORT_STATUS, &data);
1991 if (ret_val)
1992 return ret_val;
1993
1994 phy->is_mdix = !!(data & IGP01E1000_PSSR_MDIX);
1995
1996 if ((data & IGP01E1000_PSSR_SPEED_MASK) ==
1997 IGP01E1000_PSSR_SPEED_1000MBPS) {
1998 ret_val = phy->ops.get_cable_length(hw);
1999 if (ret_val)
2000 return ret_val;
2001
2002 ret_val = e1e_rphy(hw, MII_STAT1000, &data);
2003 if (ret_val)
2004 return ret_val;
2005
2006 phy->local_rx = (data & LPA_1000LOCALRXOK)
2007 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
2008
2009 phy->remote_rx = (data & LPA_1000REMRXOK)
2010 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
2011 } else {
2012 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
2013 phy->local_rx = e1000_1000t_rx_status_undefined;
2014 phy->remote_rx = e1000_1000t_rx_status_undefined;
2015 }
2016
2017 return ret_val;
2018}
2019
2020/**
2021 * e1000_get_phy_info_ife - Retrieves various IFE PHY states
2022 * @hw: pointer to the HW structure
2023 *
2024 * Populates "phy" structure with various feature states.
2025 **/
2026s32 e1000_get_phy_info_ife(struct e1000_hw *hw)
2027{
2028 struct e1000_phy_info *phy = &hw->phy;
2029 s32 ret_val;
2030 u16 data;
2031 bool link;
2032
2033 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
2034 if (ret_val)
2035 return ret_val;
2036
2037 if (!link) {
2038 e_dbg("Phy info is only valid if link is up\n");
2039 return -E1000_ERR_CONFIG;
2040 }
2041
2042 ret_val = e1e_rphy(hw, IFE_PHY_SPECIAL_CONTROL, &data);
2043 if (ret_val)
2044 return ret_val;
2045 phy->polarity_correction = !(data & IFE_PSC_AUTO_POLARITY_DISABLE);
2046
2047 if (phy->polarity_correction) {
2048 ret_val = e1000_check_polarity_ife(hw);
2049 if (ret_val)
2050 return ret_val;
2051 } else {
2052 /* Polarity is forced */
2053 phy->cable_polarity = ((data & IFE_PSC_FORCE_POLARITY)
2054 ? e1000_rev_polarity_reversed
2055 : e1000_rev_polarity_normal);
2056 }
2057
2058 ret_val = e1e_rphy(hw, IFE_PHY_MDIX_CONTROL, &data);
2059 if (ret_val)
2060 return ret_val;
2061
2062 phy->is_mdix = !!(data & IFE_PMC_MDIX_STATUS);
2063
2064 /* The following parameters are undefined for 10/100 operation. */
2065 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
2066 phy->local_rx = e1000_1000t_rx_status_undefined;
2067 phy->remote_rx = e1000_1000t_rx_status_undefined;
2068
2069 return 0;
2070}
2071
2072/**
2073 * e1000e_phy_sw_reset - PHY software reset
2074 * @hw: pointer to the HW structure
2075 *
2076 * Does a software reset of the PHY by reading the PHY control register and
2077 * setting/write the control register reset bit to the PHY.
2078 **/
2079s32 e1000e_phy_sw_reset(struct e1000_hw *hw)
2080{
2081 s32 ret_val;
2082 u16 phy_ctrl;
2083
2084 ret_val = e1e_rphy(hw, MII_BMCR, &phy_ctrl);
2085 if (ret_val)
2086 return ret_val;
2087
2088 phy_ctrl |= BMCR_RESET;
2089 ret_val = e1e_wphy(hw, MII_BMCR, phy_ctrl);
2090 if (ret_val)
2091 return ret_val;
2092
2093 udelay(1);
2094
2095 return ret_val;
2096}
2097
2098/**
2099 * e1000e_phy_hw_reset_generic - PHY hardware reset
2100 * @hw: pointer to the HW structure
2101 *
2102 * Verify the reset block is not blocking us from resetting. Acquire
2103 * semaphore (if necessary) and read/set/write the device control reset
2104 * bit in the PHY. Wait the appropriate delay time for the device to
2105 * reset and release the semaphore (if necessary).
2106 **/
2107s32 e1000e_phy_hw_reset_generic(struct e1000_hw *hw)
2108{
2109 struct e1000_phy_info *phy = &hw->phy;
2110 s32 ret_val;
2111 u32 ctrl;
2112
2113 if (phy->ops.check_reset_block) {
2114 ret_val = phy->ops.check_reset_block(hw);
2115 if (ret_val)
2116 return 0;
2117 }
2118
2119 ret_val = phy->ops.acquire(hw);
2120 if (ret_val)
2121 return ret_val;
2122
2123 ctrl = er32(CTRL);
2124 ew32(CTRL, ctrl | E1000_CTRL_PHY_RST);
2125 e1e_flush();
2126
2127 udelay(phy->reset_delay_us);
2128
2129 ew32(CTRL, ctrl);
2130 e1e_flush();
2131
2132 usleep_range(150, 300);
2133
2134 phy->ops.release(hw);
2135
2136 return phy->ops.get_cfg_done(hw);
2137}
2138
2139/**
2140 * e1000e_get_cfg_done_generic - Generic configuration done
2141 * @hw: pointer to the HW structure
2142 *
2143 * Generic function to wait 10 milli-seconds for configuration to complete
2144 * and return success.
2145 **/
2146s32 e1000e_get_cfg_done_generic(struct e1000_hw __always_unused *hw)
2147{
2148 mdelay(10);
2149
2150 return 0;
2151}
2152
2153/**
2154 * e1000e_phy_init_script_igp3 - Inits the IGP3 PHY
2155 * @hw: pointer to the HW structure
2156 *
2157 * Initializes a Intel Gigabit PHY3 when an EEPROM is not present.
2158 **/
2159s32 e1000e_phy_init_script_igp3(struct e1000_hw *hw)
2160{
2161 e_dbg("Running IGP 3 PHY init script\n");
2162
2163 /* PHY init IGP 3 */
2164 /* Enable rise/fall, 10-mode work in class-A */
2165 e1e_wphy(hw, 0x2F5B, 0x9018);
2166 /* Remove all caps from Replica path filter */
2167 e1e_wphy(hw, 0x2F52, 0x0000);
2168 /* Bias trimming for ADC, AFE and Driver (Default) */
2169 e1e_wphy(hw, 0x2FB1, 0x8B24);
2170 /* Increase Hybrid poly bias */
2171 e1e_wphy(hw, 0x2FB2, 0xF8F0);
2172 /* Add 4% to Tx amplitude in Gig mode */
2173 e1e_wphy(hw, 0x2010, 0x10B0);
2174 /* Disable trimming (TTT) */
2175 e1e_wphy(hw, 0x2011, 0x0000);
2176 /* Poly DC correction to 94.6% + 2% for all channels */
2177 e1e_wphy(hw, 0x20DD, 0x249A);
2178 /* ABS DC correction to 95.9% */
2179 e1e_wphy(hw, 0x20DE, 0x00D3);
2180 /* BG temp curve trim */
2181 e1e_wphy(hw, 0x28B4, 0x04CE);
2182 /* Increasing ADC OPAMP stage 1 currents to max */
2183 e1e_wphy(hw, 0x2F70, 0x29E4);
2184 /* Force 1000 ( required for enabling PHY regs configuration) */
2185 e1e_wphy(hw, 0x0000, 0x0140);
2186 /* Set upd_freq to 6 */
2187 e1e_wphy(hw, 0x1F30, 0x1606);
2188 /* Disable NPDFE */
2189 e1e_wphy(hw, 0x1F31, 0xB814);
2190 /* Disable adaptive fixed FFE (Default) */
2191 e1e_wphy(hw, 0x1F35, 0x002A);
2192 /* Enable FFE hysteresis */
2193 e1e_wphy(hw, 0x1F3E, 0x0067);
2194 /* Fixed FFE for short cable lengths */
2195 e1e_wphy(hw, 0x1F54, 0x0065);
2196 /* Fixed FFE for medium cable lengths */
2197 e1e_wphy(hw, 0x1F55, 0x002A);
2198 /* Fixed FFE for long cable lengths */
2199 e1e_wphy(hw, 0x1F56, 0x002A);
2200 /* Enable Adaptive Clip Threshold */
2201 e1e_wphy(hw, 0x1F72, 0x3FB0);
2202 /* AHT reset limit to 1 */
2203 e1e_wphy(hw, 0x1F76, 0xC0FF);
2204 /* Set AHT master delay to 127 msec */
2205 e1e_wphy(hw, 0x1F77, 0x1DEC);
2206 /* Set scan bits for AHT */
2207 e1e_wphy(hw, 0x1F78, 0xF9EF);
2208 /* Set AHT Preset bits */
2209 e1e_wphy(hw, 0x1F79, 0x0210);
2210 /* Change integ_factor of channel A to 3 */
2211 e1e_wphy(hw, 0x1895, 0x0003);
2212 /* Change prop_factor of channels BCD to 8 */
2213 e1e_wphy(hw, 0x1796, 0x0008);
2214 /* Change cg_icount + enable integbp for channels BCD */
2215 e1e_wphy(hw, 0x1798, 0xD008);
2216 /* Change cg_icount + enable integbp + change prop_factor_master
2217 * to 8 for channel A
2218 */
2219 e1e_wphy(hw, 0x1898, 0xD918);
2220 /* Disable AHT in Slave mode on channel A */
2221 e1e_wphy(hw, 0x187A, 0x0800);
2222 /* Enable LPLU and disable AN to 1000 in non-D0a states,
2223 * Enable SPD+B2B
2224 */
2225 e1e_wphy(hw, 0x0019, 0x008D);
2226 /* Enable restart AN on an1000_dis change */
2227 e1e_wphy(hw, 0x001B, 0x2080);
2228 /* Enable wh_fifo read clock in 10/100 modes */
2229 e1e_wphy(hw, 0x0014, 0x0045);
2230 /* Restart AN, Speed selection is 1000 */
2231 e1e_wphy(hw, 0x0000, 0x1340);
2232
2233 return 0;
2234}
2235
2236/**
2237 * e1000e_get_phy_type_from_id - Get PHY type from id
2238 * @phy_id: phy_id read from the phy
2239 *
2240 * Returns the phy type from the id.
2241 **/
2242enum e1000_phy_type e1000e_get_phy_type_from_id(u32 phy_id)
2243{
2244 enum e1000_phy_type phy_type = e1000_phy_unknown;
2245
2246 switch (phy_id) {
2247 case M88E1000_I_PHY_ID:
2248 case M88E1000_E_PHY_ID:
2249 case M88E1111_I_PHY_ID:
2250 case M88E1011_I_PHY_ID:
2251 phy_type = e1000_phy_m88;
2252 break;
2253 case IGP01E1000_I_PHY_ID: /* IGP 1 & 2 share this */
2254 phy_type = e1000_phy_igp_2;
2255 break;
2256 case GG82563_E_PHY_ID:
2257 phy_type = e1000_phy_gg82563;
2258 break;
2259 case IGP03E1000_E_PHY_ID:
2260 phy_type = e1000_phy_igp_3;
2261 break;
2262 case IFE_E_PHY_ID:
2263 case IFE_PLUS_E_PHY_ID:
2264 case IFE_C_E_PHY_ID:
2265 phy_type = e1000_phy_ife;
2266 break;
2267 case BME1000_E_PHY_ID:
2268 case BME1000_E_PHY_ID_R2:
2269 phy_type = e1000_phy_bm;
2270 break;
2271 case I82578_E_PHY_ID:
2272 phy_type = e1000_phy_82578;
2273 break;
2274 case I82577_E_PHY_ID:
2275 phy_type = e1000_phy_82577;
2276 break;
2277 case I82579_E_PHY_ID:
2278 phy_type = e1000_phy_82579;
2279 break;
2280 case I217_E_PHY_ID:
2281 phy_type = e1000_phy_i217;
2282 break;
2283 default:
2284 phy_type = e1000_phy_unknown;
2285 break;
2286 }
2287 return phy_type;
2288}
2289
2290/**
2291 * e1000e_determine_phy_address - Determines PHY address.
2292 * @hw: pointer to the HW structure
2293 *
2294 * This uses a trial and error method to loop through possible PHY
2295 * addresses. It tests each by reading the PHY ID registers and
2296 * checking for a match.
2297 **/
2298s32 e1000e_determine_phy_address(struct e1000_hw *hw)
2299{
2300 u32 phy_addr = 0;
2301 u32 i;
2302 enum e1000_phy_type phy_type = e1000_phy_unknown;
2303
2304 hw->phy.id = phy_type;
2305
2306 for (phy_addr = 0; phy_addr < E1000_MAX_PHY_ADDR; phy_addr++) {
2307 hw->phy.addr = phy_addr;
2308 i = 0;
2309
2310 do {
2311 e1000e_get_phy_id(hw);
2312 phy_type = e1000e_get_phy_type_from_id(hw->phy.id);
2313
2314 /* If phy_type is valid, break - we found our
2315 * PHY address
2316 */
2317 if (phy_type != e1000_phy_unknown)
2318 return 0;
2319
2320 usleep_range(1000, 2000);
2321 i++;
2322 } while (i < 10);
2323 }
2324
2325 return -E1000_ERR_PHY_TYPE;
2326}
2327
2328/**
2329 * e1000_get_phy_addr_for_bm_page - Retrieve PHY page address
2330 * @page: page to access
2331 *
2332 * Returns the phy address for the page requested.
2333 **/
2334static u32 e1000_get_phy_addr_for_bm_page(u32 page, u32 reg)
2335{
2336 u32 phy_addr = 2;
2337
2338 if ((page >= 768) || (page == 0 && reg == 25) || (reg == 31))
2339 phy_addr = 1;
2340
2341 return phy_addr;
2342}
2343
2344/**
2345 * e1000e_write_phy_reg_bm - Write BM PHY register
2346 * @hw: pointer to the HW structure
2347 * @offset: register offset to write to
2348 * @data: data to write at register offset
2349 *
2350 * Acquires semaphore, if necessary, then writes the data to PHY register
2351 * at the offset. Release any acquired semaphores before exiting.
2352 **/
2353s32 e1000e_write_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 data)
2354{
2355 s32 ret_val;
2356 u32 page = offset >> IGP_PAGE_SHIFT;
2357
2358 ret_val = hw->phy.ops.acquire(hw);
2359 if (ret_val)
2360 return ret_val;
2361
2362 /* Page 800 works differently than the rest so it has its own func */
2363 if (page == BM_WUC_PAGE) {
2364 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2365 false, false);
2366 goto release;
2367 }
2368
2369 hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
2370
2371 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2372 u32 page_shift, page_select;
2373
2374 /* Page select is register 31 for phy address 1 and 22 for
2375 * phy address 2 and 3. Page select is shifted only for
2376 * phy address 1.
2377 */
2378 if (hw->phy.addr == 1) {
2379 page_shift = IGP_PAGE_SHIFT;
2380 page_select = IGP01E1000_PHY_PAGE_SELECT;
2381 } else {
2382 page_shift = 0;
2383 page_select = BM_PHY_PAGE_SELECT;
2384 }
2385
2386 /* Page is shifted left, PHY expects (page x 32) */
2387 ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
2388 (page << page_shift));
2389 if (ret_val)
2390 goto release;
2391 }
2392
2393 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2394 data);
2395
2396release:
2397 hw->phy.ops.release(hw);
2398 return ret_val;
2399}
2400
2401/**
2402 * e1000e_read_phy_reg_bm - Read BM PHY register
2403 * @hw: pointer to the HW structure
2404 * @offset: register offset to be read
2405 * @data: pointer to the read data
2406 *
2407 * Acquires semaphore, if necessary, then reads the PHY register at offset
2408 * and storing the retrieved information in data. Release any acquired
2409 * semaphores before exiting.
2410 **/
2411s32 e1000e_read_phy_reg_bm(struct e1000_hw *hw, u32 offset, u16 *data)
2412{
2413 s32 ret_val;
2414 u32 page = offset >> IGP_PAGE_SHIFT;
2415
2416 ret_val = hw->phy.ops.acquire(hw);
2417 if (ret_val)
2418 return ret_val;
2419
2420 /* Page 800 works differently than the rest so it has its own func */
2421 if (page == BM_WUC_PAGE) {
2422 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2423 true, false);
2424 goto release;
2425 }
2426
2427 hw->phy.addr = e1000_get_phy_addr_for_bm_page(page, offset);
2428
2429 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2430 u32 page_shift, page_select;
2431
2432 /* Page select is register 31 for phy address 1 and 22 for
2433 * phy address 2 and 3. Page select is shifted only for
2434 * phy address 1.
2435 */
2436 if (hw->phy.addr == 1) {
2437 page_shift = IGP_PAGE_SHIFT;
2438 page_select = IGP01E1000_PHY_PAGE_SELECT;
2439 } else {
2440 page_shift = 0;
2441 page_select = BM_PHY_PAGE_SELECT;
2442 }
2443
2444 /* Page is shifted left, PHY expects (page x 32) */
2445 ret_val = e1000e_write_phy_reg_mdic(hw, page_select,
2446 (page << page_shift));
2447 if (ret_val)
2448 goto release;
2449 }
2450
2451 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2452 data);
2453release:
2454 hw->phy.ops.release(hw);
2455 return ret_val;
2456}
2457
2458/**
2459 * e1000e_read_phy_reg_bm2 - Read BM PHY register
2460 * @hw: pointer to the HW structure
2461 * @offset: register offset to be read
2462 * @data: pointer to the read data
2463 *
2464 * Acquires semaphore, if necessary, then reads the PHY register at offset
2465 * and storing the retrieved information in data. Release any acquired
2466 * semaphores before exiting.
2467 **/
2468s32 e1000e_read_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 *data)
2469{
2470 s32 ret_val;
2471 u16 page = (u16)(offset >> IGP_PAGE_SHIFT);
2472
2473 ret_val = hw->phy.ops.acquire(hw);
2474 if (ret_val)
2475 return ret_val;
2476
2477 /* Page 800 works differently than the rest so it has its own func */
2478 if (page == BM_WUC_PAGE) {
2479 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2480 true, false);
2481 goto release;
2482 }
2483
2484 hw->phy.addr = 1;
2485
2486 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2487 /* Page is shifted left, PHY expects (page x 32) */
2488 ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
2489 page);
2490
2491 if (ret_val)
2492 goto release;
2493 }
2494
2495 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2496 data);
2497release:
2498 hw->phy.ops.release(hw);
2499 return ret_val;
2500}
2501
2502/**
2503 * e1000e_write_phy_reg_bm2 - Write BM PHY register
2504 * @hw: pointer to the HW structure
2505 * @offset: register offset to write to
2506 * @data: data to write at register offset
2507 *
2508 * Acquires semaphore, if necessary, then writes the data to PHY register
2509 * at the offset. Release any acquired semaphores before exiting.
2510 **/
2511s32 e1000e_write_phy_reg_bm2(struct e1000_hw *hw, u32 offset, u16 data)
2512{
2513 s32 ret_val;
2514 u16 page = (u16)(offset >> IGP_PAGE_SHIFT);
2515
2516 ret_val = hw->phy.ops.acquire(hw);
2517 if (ret_val)
2518 return ret_val;
2519
2520 /* Page 800 works differently than the rest so it has its own func */
2521 if (page == BM_WUC_PAGE) {
2522 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2523 false, false);
2524 goto release;
2525 }
2526
2527 hw->phy.addr = 1;
2528
2529 if (offset > MAX_PHY_MULTI_PAGE_REG) {
2530 /* Page is shifted left, PHY expects (page x 32) */
2531 ret_val = e1000e_write_phy_reg_mdic(hw, BM_PHY_PAGE_SELECT,
2532 page);
2533
2534 if (ret_val)
2535 goto release;
2536 }
2537
2538 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & offset,
2539 data);
2540
2541release:
2542 hw->phy.ops.release(hw);
2543 return ret_val;
2544}
2545
2546/**
2547 * e1000_enable_phy_wakeup_reg_access_bm - enable access to BM wakeup registers
2548 * @hw: pointer to the HW structure
2549 * @phy_reg: pointer to store original contents of BM_WUC_ENABLE_REG
2550 *
2551 * Assumes semaphore already acquired and phy_reg points to a valid memory
2552 * address to store contents of the BM_WUC_ENABLE_REG register.
2553 **/
2554s32 e1000_enable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
2555{
2556 s32 ret_val;
2557 u16 temp;
2558
2559 /* All page select, port ctrl and wakeup registers use phy address 1 */
2560 hw->phy.addr = 1;
2561
2562 /* Select Port Control Registers page */
2563 ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
2564 if (ret_val) {
2565 e_dbg("Could not set Port Control page\n");
2566 return ret_val;
2567 }
2568
2569 ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
2570 if (ret_val) {
2571 e_dbg("Could not read PHY register %d.%d\n",
2572 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2573 return ret_val;
2574 }
2575
2576 /* Enable both PHY wakeup mode and Wakeup register page writes.
2577 * Prevent a power state change by disabling ME and Host PHY wakeup.
2578 */
2579 temp = *phy_reg;
2580 temp |= BM_WUC_ENABLE_BIT;
2581 temp &= ~(BM_WUC_ME_WU_BIT | BM_WUC_HOST_WU_BIT);
2582
2583 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, temp);
2584 if (ret_val) {
2585 e_dbg("Could not write PHY register %d.%d\n",
2586 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2587 return ret_val;
2588 }
2589
2590 /* Select Host Wakeup Registers page - caller now able to write
2591 * registers on the Wakeup registers page
2592 */
2593 return e1000_set_page_igp(hw, (BM_WUC_PAGE << IGP_PAGE_SHIFT));
2594}
2595
2596/**
2597 * e1000_disable_phy_wakeup_reg_access_bm - disable access to BM wakeup regs
2598 * @hw: pointer to the HW structure
2599 * @phy_reg: pointer to original contents of BM_WUC_ENABLE_REG
2600 *
2601 * Restore BM_WUC_ENABLE_REG to its original value.
2602 *
2603 * Assumes semaphore already acquired and *phy_reg is the contents of the
2604 * BM_WUC_ENABLE_REG before register(s) on BM_WUC_PAGE were accessed by
2605 * caller.
2606 **/
2607s32 e1000_disable_phy_wakeup_reg_access_bm(struct e1000_hw *hw, u16 *phy_reg)
2608{
2609 s32 ret_val;
2610
2611 /* Select Port Control Registers page */
2612 ret_val = e1000_set_page_igp(hw, (BM_PORT_CTRL_PAGE << IGP_PAGE_SHIFT));
2613 if (ret_val) {
2614 e_dbg("Could not set Port Control page\n");
2615 return ret_val;
2616 }
2617
2618 /* Restore 769.17 to its original value */
2619 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, *phy_reg);
2620 if (ret_val)
2621 e_dbg("Could not restore PHY register %d.%d\n",
2622 BM_PORT_CTRL_PAGE, BM_WUC_ENABLE_REG);
2623
2624 return ret_val;
2625}
2626
2627/**
2628 * e1000_access_phy_wakeup_reg_bm - Read/write BM PHY wakeup register
2629 * @hw: pointer to the HW structure
2630 * @offset: register offset to be read or written
2631 * @data: pointer to the data to read or write
2632 * @read: determines if operation is read or write
2633 * @page_set: BM_WUC_PAGE already set and access enabled
2634 *
2635 * Read the PHY register at offset and store the retrieved information in
2636 * data, or write data to PHY register at offset. Note the procedure to
2637 * access the PHY wakeup registers is different than reading the other PHY
2638 * registers. It works as such:
2639 * 1) Set 769.17.2 (page 769, register 17, bit 2) = 1
2640 * 2) Set page to 800 for host (801 if we were manageability)
2641 * 3) Write the address using the address opcode (0x11)
2642 * 4) Read or write the data using the data opcode (0x12)
2643 * 5) Restore 769.17.2 to its original value
2644 *
2645 * Steps 1 and 2 are done by e1000_enable_phy_wakeup_reg_access_bm() and
2646 * step 5 is done by e1000_disable_phy_wakeup_reg_access_bm().
2647 *
2648 * Assumes semaphore is already acquired. When page_set==true, assumes
2649 * the PHY page is set to BM_WUC_PAGE (i.e. a function in the call stack
2650 * is responsible for calls to e1000_[enable|disable]_phy_wakeup_reg_bm()).
2651 **/
2652static s32 e1000_access_phy_wakeup_reg_bm(struct e1000_hw *hw, u32 offset,
2653 u16 *data, bool read, bool page_set)
2654{
2655 s32 ret_val;
2656 u16 reg = BM_PHY_REG_NUM(offset);
2657 u16 page = BM_PHY_REG_PAGE(offset);
2658 u16 phy_reg = 0;
2659
2660 /* Gig must be disabled for MDIO accesses to Host Wakeup reg page */
2661 if ((hw->mac.type == e1000_pchlan) &&
2662 (!(er32(PHY_CTRL) & E1000_PHY_CTRL_GBE_DISABLE)))
2663 e_dbg("Attempting to access page %d while gig enabled.\n",
2664 page);
2665
2666 if (!page_set) {
2667 /* Enable access to PHY wakeup registers */
2668 ret_val = e1000_enable_phy_wakeup_reg_access_bm(hw, &phy_reg);
2669 if (ret_val) {
2670 e_dbg("Could not enable PHY wakeup reg access\n");
2671 return ret_val;
2672 }
2673 }
2674
2675 e_dbg("Accessing PHY page %d reg 0x%x\n", page, reg);
2676
2677 /* Write the Wakeup register page offset value using opcode 0x11 */
2678 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_ADDRESS_OPCODE, reg);
2679 if (ret_val) {
2680 e_dbg("Could not write address opcode to page %d\n", page);
2681 return ret_val;
2682 }
2683
2684 if (read) {
2685 /* Read the Wakeup register page value using opcode 0x12 */
2686 ret_val = e1000e_read_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
2687 data);
2688 } else {
2689 /* Write the Wakeup register page value using opcode 0x12 */
2690 ret_val = e1000e_write_phy_reg_mdic(hw, BM_WUC_DATA_OPCODE,
2691 *data);
2692 }
2693
2694 if (ret_val) {
2695 e_dbg("Could not access PHY reg %d.%d\n", page, reg);
2696 return ret_val;
2697 }
2698
2699 if (!page_set)
2700 ret_val = e1000_disable_phy_wakeup_reg_access_bm(hw, &phy_reg);
2701
2702 return ret_val;
2703}
2704
2705/**
2706 * e1000_power_up_phy_copper - Restore copper link in case of PHY power down
2707 * @hw: pointer to the HW structure
2708 *
2709 * In the case of a PHY power down to save power, or to turn off link during a
2710 * driver unload, or wake on lan is not enabled, restore the link to previous
2711 * settings.
2712 **/
2713void e1000_power_up_phy_copper(struct e1000_hw *hw)
2714{
2715 u16 mii_reg = 0;
2716
2717 /* The PHY will retain its settings across a power down/up cycle */
2718 e1e_rphy(hw, MII_BMCR, &mii_reg);
2719 mii_reg &= ~BMCR_PDOWN;
2720 e1e_wphy(hw, MII_BMCR, mii_reg);
2721}
2722
2723/**
2724 * e1000_power_down_phy_copper - Restore copper link in case of PHY power down
2725 * @hw: pointer to the HW structure
2726 *
2727 * In the case of a PHY power down to save power, or to turn off link during a
2728 * driver unload, or wake on lan is not enabled, restore the link to previous
2729 * settings.
2730 **/
2731void e1000_power_down_phy_copper(struct e1000_hw *hw)
2732{
2733 u16 mii_reg = 0;
2734
2735 /* The PHY will retain its settings across a power down/up cycle */
2736 e1e_rphy(hw, MII_BMCR, &mii_reg);
2737 mii_reg |= BMCR_PDOWN;
2738 e1e_wphy(hw, MII_BMCR, mii_reg);
2739 usleep_range(1000, 2000);
2740}
2741
2742/**
2743 * __e1000_read_phy_reg_hv - Read HV PHY register
2744 * @hw: pointer to the HW structure
2745 * @offset: register offset to be read
2746 * @data: pointer to the read data
2747 * @locked: semaphore has already been acquired or not
2748 *
2749 * Acquires semaphore, if necessary, then reads the PHY register at offset
2750 * and stores the retrieved information in data. Release any acquired
2751 * semaphore before exiting.
2752 **/
2753static s32 __e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data,
2754 bool locked, bool page_set)
2755{
2756 s32 ret_val;
2757 u16 page = BM_PHY_REG_PAGE(offset);
2758 u16 reg = BM_PHY_REG_NUM(offset);
2759 u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);
2760
2761 if (!locked) {
2762 ret_val = hw->phy.ops.acquire(hw);
2763 if (ret_val)
2764 return ret_val;
2765 }
2766
2767 /* Page 800 works differently than the rest so it has its own func */
2768 if (page == BM_WUC_PAGE) {
2769 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, data,
2770 true, page_set);
2771 goto out;
2772 }
2773
2774 if (page > 0 && page < HV_INTC_FC_PAGE_START) {
2775 ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
2776 data, true);
2777 goto out;
2778 }
2779
2780 if (!page_set) {
2781 if (page == HV_INTC_FC_PAGE_START)
2782 page = 0;
2783
2784 if (reg > MAX_PHY_MULTI_PAGE_REG) {
2785 /* Page is shifted left, PHY expects (page x 32) */
2786 ret_val = e1000_set_page_igp(hw,
2787 (page << IGP_PAGE_SHIFT));
2788
2789 hw->phy.addr = phy_addr;
2790
2791 if (ret_val)
2792 goto out;
2793 }
2794 }
2795
2796 e_dbg("reading PHY page %d (or 0x%x shifted) reg 0x%x\n", page,
2797 page << IGP_PAGE_SHIFT, reg);
2798
2799 ret_val = e1000e_read_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg, data);
2800out:
2801 if (!locked)
2802 hw->phy.ops.release(hw);
2803
2804 return ret_val;
2805}
2806
2807/**
2808 * e1000_read_phy_reg_hv - Read HV PHY register
2809 * @hw: pointer to the HW structure
2810 * @offset: register offset to be read
2811 * @data: pointer to the read data
2812 *
2813 * Acquires semaphore then reads the PHY register at offset and stores
2814 * the retrieved information in data. Release the acquired semaphore
2815 * before exiting.
2816 **/
2817s32 e1000_read_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 *data)
2818{
2819 return __e1000_read_phy_reg_hv(hw, offset, data, false, false);
2820}
2821
2822/**
2823 * e1000_read_phy_reg_hv_locked - Read HV PHY register
2824 * @hw: pointer to the HW structure
2825 * @offset: register offset to be read
2826 * @data: pointer to the read data
2827 *
2828 * Reads the PHY register at offset and stores the retrieved information
2829 * in data. Assumes semaphore already acquired.
2830 **/
2831s32 e1000_read_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 *data)
2832{
2833 return __e1000_read_phy_reg_hv(hw, offset, data, true, false);
2834}
2835
2836/**
2837 * e1000_read_phy_reg_page_hv - Read HV PHY register
2838 * @hw: pointer to the HW structure
2839 * @offset: register offset to write to
2840 * @data: data to write at register offset
2841 *
2842 * Reads the PHY register at offset and stores the retrieved information
2843 * in data. Assumes semaphore already acquired and page already set.
2844 **/
2845s32 e1000_read_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 *data)
2846{
2847 return __e1000_read_phy_reg_hv(hw, offset, data, true, true);
2848}
2849
2850/**
2851 * __e1000_write_phy_reg_hv - Write HV PHY register
2852 * @hw: pointer to the HW structure
2853 * @offset: register offset to write to
2854 * @data: data to write at register offset
2855 * @locked: semaphore has already been acquired or not
2856 *
2857 * Acquires semaphore, if necessary, then writes the data to PHY register
2858 * at the offset. Release any acquired semaphores before exiting.
2859 **/
2860static s32 __e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data,
2861 bool locked, bool page_set)
2862{
2863 s32 ret_val;
2864 u16 page = BM_PHY_REG_PAGE(offset);
2865 u16 reg = BM_PHY_REG_NUM(offset);
2866 u32 phy_addr = hw->phy.addr = e1000_get_phy_addr_for_hv_page(page);
2867
2868 if (!locked) {
2869 ret_val = hw->phy.ops.acquire(hw);
2870 if (ret_val)
2871 return ret_val;
2872 }
2873
2874 /* Page 800 works differently than the rest so it has its own func */
2875 if (page == BM_WUC_PAGE) {
2876 ret_val = e1000_access_phy_wakeup_reg_bm(hw, offset, &data,
2877 false, page_set);
2878 goto out;
2879 }
2880
2881 if (page > 0 && page < HV_INTC_FC_PAGE_START) {
2882 ret_val = e1000_access_phy_debug_regs_hv(hw, offset,
2883 &data, false);
2884 goto out;
2885 }
2886
2887 if (!page_set) {
2888 if (page == HV_INTC_FC_PAGE_START)
2889 page = 0;
2890
2891 /* Workaround MDIO accesses being disabled after entering IEEE
2892 * Power Down (when bit 11 of the PHY Control register is set)
2893 */
2894 if ((hw->phy.type == e1000_phy_82578) &&
2895 (hw->phy.revision >= 1) &&
2896 (hw->phy.addr == 2) &&
2897 !(MAX_PHY_REG_ADDRESS & reg) && (data & (1 << 11))) {
2898 u16 data2 = 0x7EFF;
2899
2900 ret_val = e1000_access_phy_debug_regs_hv(hw,
2901 (1 << 6) | 0x3,
2902 &data2, false);
2903 if (ret_val)
2904 goto out;
2905 }
2906
2907 if (reg > MAX_PHY_MULTI_PAGE_REG) {
2908 /* Page is shifted left, PHY expects (page x 32) */
2909 ret_val = e1000_set_page_igp(hw,
2910 (page << IGP_PAGE_SHIFT));
2911
2912 hw->phy.addr = phy_addr;
2913
2914 if (ret_val)
2915 goto out;
2916 }
2917 }
2918
2919 e_dbg("writing PHY page %d (or 0x%x shifted) reg 0x%x\n", page,
2920 page << IGP_PAGE_SHIFT, reg);
2921
2922 ret_val = e1000e_write_phy_reg_mdic(hw, MAX_PHY_REG_ADDRESS & reg,
2923 data);
2924
2925out:
2926 if (!locked)
2927 hw->phy.ops.release(hw);
2928
2929 return ret_val;
2930}
2931
2932/**
2933 * e1000_write_phy_reg_hv - Write HV PHY register
2934 * @hw: pointer to the HW structure
2935 * @offset: register offset to write to
2936 * @data: data to write at register offset
2937 *
2938 * Acquires semaphore then writes the data to PHY register at the offset.
2939 * Release the acquired semaphores before exiting.
2940 **/
2941s32 e1000_write_phy_reg_hv(struct e1000_hw *hw, u32 offset, u16 data)
2942{
2943 return __e1000_write_phy_reg_hv(hw, offset, data, false, false);
2944}
2945
2946/**
2947 * e1000_write_phy_reg_hv_locked - Write HV PHY register
2948 * @hw: pointer to the HW structure
2949 * @offset: register offset to write to
2950 * @data: data to write at register offset
2951 *
2952 * Writes the data to PHY register at the offset. Assumes semaphore
2953 * already acquired.
2954 **/
2955s32 e1000_write_phy_reg_hv_locked(struct e1000_hw *hw, u32 offset, u16 data)
2956{
2957 return __e1000_write_phy_reg_hv(hw, offset, data, true, false);
2958}
2959
2960/**
2961 * e1000_write_phy_reg_page_hv - Write HV PHY register
2962 * @hw: pointer to the HW structure
2963 * @offset: register offset to write to
2964 * @data: data to write at register offset
2965 *
2966 * Writes the data to PHY register at the offset. Assumes semaphore
2967 * already acquired and page already set.
2968 **/
2969s32 e1000_write_phy_reg_page_hv(struct e1000_hw *hw, u32 offset, u16 data)
2970{
2971 return __e1000_write_phy_reg_hv(hw, offset, data, true, true);
2972}
2973
2974/**
2975 * e1000_get_phy_addr_for_hv_page - Get PHY address based on page
2976 * @page: page to be accessed
2977 **/
2978static u32 e1000_get_phy_addr_for_hv_page(u32 page)
2979{
2980 u32 phy_addr = 2;
2981
2982 if (page >= HV_INTC_FC_PAGE_START)
2983 phy_addr = 1;
2984
2985 return phy_addr;
2986}
2987
2988/**
2989 * e1000_access_phy_debug_regs_hv - Read HV PHY vendor specific high registers
2990 * @hw: pointer to the HW structure
2991 * @offset: register offset to be read or written
2992 * @data: pointer to the data to be read or written
2993 * @read: determines if operation is read or write
2994 *
2995 * Reads the PHY register at offset and stores the retreived information
2996 * in data. Assumes semaphore already acquired. Note that the procedure
2997 * to access these regs uses the address port and data port to read/write.
2998 * These accesses done with PHY address 2 and without using pages.
2999 **/
3000static s32 e1000_access_phy_debug_regs_hv(struct e1000_hw *hw, u32 offset,
3001 u16 *data, bool read)
3002{
3003 s32 ret_val;
3004 u32 addr_reg;
3005 u32 data_reg;
3006
3007 /* This takes care of the difference with desktop vs mobile phy */
3008 addr_reg = ((hw->phy.type == e1000_phy_82578) ?
3009 I82578_ADDR_REG : I82577_ADDR_REG);
3010 data_reg = addr_reg + 1;
3011
3012 /* All operations in this function are phy address 2 */
3013 hw->phy.addr = 2;
3014
3015 /* masking with 0x3F to remove the page from offset */
3016 ret_val = e1000e_write_phy_reg_mdic(hw, addr_reg, (u16)offset & 0x3F);
3017 if (ret_val) {
3018 e_dbg("Could not write the Address Offset port register\n");
3019 return ret_val;
3020 }
3021
3022 /* Read or write the data value next */
3023 if (read)
3024 ret_val = e1000e_read_phy_reg_mdic(hw, data_reg, data);
3025 else
3026 ret_val = e1000e_write_phy_reg_mdic(hw, data_reg, *data);
3027
3028 if (ret_val)
3029 e_dbg("Could not access the Data port register\n");
3030
3031 return ret_val;
3032}
3033
3034/**
3035 * e1000_link_stall_workaround_hv - Si workaround
3036 * @hw: pointer to the HW structure
3037 *
3038 * This function works around a Si bug where the link partner can get
3039 * a link up indication before the PHY does. If small packets are sent
3040 * by the link partner they can be placed in the packet buffer without
3041 * being properly accounted for by the PHY and will stall preventing
3042 * further packets from being received. The workaround is to clear the
3043 * packet buffer after the PHY detects link up.
3044 **/
3045s32 e1000_link_stall_workaround_hv(struct e1000_hw *hw)
3046{
3047 s32 ret_val = 0;
3048 u16 data;
3049
3050 if (hw->phy.type != e1000_phy_82578)
3051 return 0;
3052
3053 /* Do not apply workaround if in PHY loopback bit 14 set */
3054 e1e_rphy(hw, MII_BMCR, &data);
3055 if (data & BMCR_LOOPBACK)
3056 return 0;
3057
3058 /* check if link is up and at 1Gbps */
3059 ret_val = e1e_rphy(hw, BM_CS_STATUS, &data);
3060 if (ret_val)
3061 return ret_val;
3062
3063 data &= (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED |
3064 BM_CS_STATUS_SPEED_MASK);
3065
3066 if (data != (BM_CS_STATUS_LINK_UP | BM_CS_STATUS_RESOLVED |
3067 BM_CS_STATUS_SPEED_1000))
3068 return 0;
3069
3070 msleep(200);
3071
3072 /* flush the packets in the fifo buffer */
3073 ret_val = e1e_wphy(hw, HV_MUX_DATA_CTRL,
3074 (HV_MUX_DATA_CTRL_GEN_TO_MAC |
3075 HV_MUX_DATA_CTRL_FORCE_SPEED));
3076 if (ret_val)
3077 return ret_val;
3078
3079 return e1e_wphy(hw, HV_MUX_DATA_CTRL, HV_MUX_DATA_CTRL_GEN_TO_MAC);
3080}
3081
3082/**
3083 * e1000_check_polarity_82577 - Checks the polarity.
3084 * @hw: pointer to the HW structure
3085 *
3086 * Success returns 0, Failure returns -E1000_ERR_PHY (-2)
3087 *
3088 * Polarity is determined based on the PHY specific status register.
3089 **/
3090s32 e1000_check_polarity_82577(struct e1000_hw *hw)
3091{
3092 struct e1000_phy_info *phy = &hw->phy;
3093 s32 ret_val;
3094 u16 data;
3095
3096 ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
3097
3098 if (!ret_val)
3099 phy->cable_polarity = ((data & I82577_PHY_STATUS2_REV_POLARITY)
3100 ? e1000_rev_polarity_reversed
3101 : e1000_rev_polarity_normal);
3102
3103 return ret_val;
3104}
3105
3106/**
3107 * e1000_phy_force_speed_duplex_82577 - Force speed/duplex for I82577 PHY
3108 * @hw: pointer to the HW structure
3109 *
3110 * Calls the PHY setup function to force speed and duplex.
3111 **/
3112s32 e1000_phy_force_speed_duplex_82577(struct e1000_hw *hw)
3113{
3114 struct e1000_phy_info *phy = &hw->phy;
3115 s32 ret_val;
3116 u16 phy_data;
3117 bool link;
3118
3119 ret_val = e1e_rphy(hw, MII_BMCR, &phy_data);
3120 if (ret_val)
3121 return ret_val;
3122
3123 e1000e_phy_force_speed_duplex_setup(hw, &phy_data);
3124
3125 ret_val = e1e_wphy(hw, MII_BMCR, phy_data);
3126 if (ret_val)
3127 return ret_val;
3128
3129 udelay(1);
3130
3131 if (phy->autoneg_wait_to_complete) {
3132 e_dbg("Waiting for forced speed/duplex link on 82577 phy\n");
3133
3134 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
3135 100000, &link);
3136 if (ret_val)
3137 return ret_val;
3138
3139 if (!link)
3140 e_dbg("Link taking longer than expected.\n");
3141
3142 /* Try once more */
3143 ret_val = e1000e_phy_has_link_generic(hw, PHY_FORCE_LIMIT,
3144 100000, &link);
3145 }
3146
3147 return ret_val;
3148}
3149
3150/**
3151 * e1000_get_phy_info_82577 - Retrieve I82577 PHY information
3152 * @hw: pointer to the HW structure
3153 *
3154 * Read PHY status to determine if link is up. If link is up, then
3155 * set/determine 10base-T extended distance and polarity correction. Read
3156 * PHY port status to determine MDI/MDIx and speed. Based on the speed,
3157 * determine on the cable length, local and remote receiver.
3158 **/
3159s32 e1000_get_phy_info_82577(struct e1000_hw *hw)
3160{
3161 struct e1000_phy_info *phy = &hw->phy;
3162 s32 ret_val;
3163 u16 data;
3164 bool link;
3165
3166 ret_val = e1000e_phy_has_link_generic(hw, 1, 0, &link);
3167 if (ret_val)
3168 return ret_val;
3169
3170 if (!link) {
3171 e_dbg("Phy info is only valid if link is up\n");
3172 return -E1000_ERR_CONFIG;
3173 }
3174
3175 phy->polarity_correction = true;
3176
3177 ret_val = e1000_check_polarity_82577(hw);
3178 if (ret_val)
3179 return ret_val;
3180
3181 ret_val = e1e_rphy(hw, I82577_PHY_STATUS_2, &data);
3182 if (ret_val)
3183 return ret_val;
3184
3185 phy->is_mdix = !!(data & I82577_PHY_STATUS2_MDIX);
3186
3187 if ((data & I82577_PHY_STATUS2_SPEED_MASK) ==
3188 I82577_PHY_STATUS2_SPEED_1000MBPS) {
3189 ret_val = hw->phy.ops.get_cable_length(hw);
3190 if (ret_val)
3191 return ret_val;
3192
3193 ret_val = e1e_rphy(hw, MII_STAT1000, &data);
3194 if (ret_val)
3195 return ret_val;
3196
3197 phy->local_rx = (data & LPA_1000LOCALRXOK)
3198 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3199
3200 phy->remote_rx = (data & LPA_1000REMRXOK)
3201 ? e1000_1000t_rx_status_ok : e1000_1000t_rx_status_not_ok;
3202 } else {
3203 phy->cable_length = E1000_CABLE_LENGTH_UNDEFINED;
3204 phy->local_rx = e1000_1000t_rx_status_undefined;
3205 phy->remote_rx = e1000_1000t_rx_status_undefined;
3206 }
3207
3208 return 0;
3209}
3210
3211/**
3212 * e1000_get_cable_length_82577 - Determine cable length for 82577 PHY
3213 * @hw: pointer to the HW structure
3214 *
3215 * Reads the diagnostic status register and verifies result is valid before
3216 * placing it in the phy_cable_length field.
3217 **/
3218s32 e1000_get_cable_length_82577(struct e1000_hw *hw)
3219{
3220 struct e1000_phy_info *phy = &hw->phy;
3221 s32 ret_val;
3222 u16 phy_data, length;
3223
3224 ret_val = e1e_rphy(hw, I82577_PHY_DIAG_STATUS, &phy_data);
3225 if (ret_val)
3226 return ret_val;
3227
3228 length = ((phy_data & I82577_DSTATUS_CABLE_LENGTH) >>
3229 I82577_DSTATUS_CABLE_LENGTH_SHIFT);
3230
3231 if (length == E1000_CABLE_LENGTH_UNDEFINED)
3232 return -E1000_ERR_PHY;
3233
3234 phy->cable_length = length;
3235
3236 return 0;
3237}