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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2015-2017 Broadcom
4 */
5
6#include "bcm-phy-lib.h"
7#include <linux/bitfield.h>
8#include <linux/brcmphy.h>
9#include <linux/etherdevice.h>
10#include <linux/export.h>
11#include <linux/mdio.h>
12#include <linux/module.h>
13#include <linux/phy.h>
14#include <linux/ethtool.h>
15#include <linux/ethtool_netlink.h>
16#include <linux/netdevice.h>
17
18#define MII_BCM_CHANNEL_WIDTH 0x2000
19#define BCM_CL45VEN_EEE_ADV 0x3c
20
21int __bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
22{
23 int rc;
24
25 rc = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
26 if (rc < 0)
27 return rc;
28
29 return __phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
30}
31EXPORT_SYMBOL_GPL(__bcm_phy_write_exp);
32
33int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
34{
35 int rc;
36
37 phy_lock_mdio_bus(phydev);
38 rc = __bcm_phy_write_exp(phydev, reg, val);
39 phy_unlock_mdio_bus(phydev);
40
41 return rc;
42}
43EXPORT_SYMBOL_GPL(bcm_phy_write_exp);
44
45int __bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
46{
47 int val;
48
49 val = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
50 if (val < 0)
51 return val;
52
53 val = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
54
55 /* Restore default value. It's O.K. if this write fails. */
56 __phy_write(phydev, MII_BCM54XX_EXP_SEL, 0);
57
58 return val;
59}
60EXPORT_SYMBOL_GPL(__bcm_phy_read_exp);
61
62int bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
63{
64 int rc;
65
66 phy_lock_mdio_bus(phydev);
67 rc = __bcm_phy_read_exp(phydev, reg);
68 phy_unlock_mdio_bus(phydev);
69
70 return rc;
71}
72EXPORT_SYMBOL_GPL(bcm_phy_read_exp);
73
74int __bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set)
75{
76 int new, ret;
77
78 ret = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
79 if (ret < 0)
80 return ret;
81
82 ret = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
83 if (ret < 0)
84 return ret;
85
86 new = (ret & ~mask) | set;
87 if (new == ret)
88 return 0;
89
90 return __phy_write(phydev, MII_BCM54XX_EXP_DATA, new);
91}
92EXPORT_SYMBOL_GPL(__bcm_phy_modify_exp);
93
94int bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set)
95{
96 int ret;
97
98 phy_lock_mdio_bus(phydev);
99 ret = __bcm_phy_modify_exp(phydev, reg, mask, set);
100 phy_unlock_mdio_bus(phydev);
101
102 return ret;
103}
104EXPORT_SYMBOL_GPL(bcm_phy_modify_exp);
105
106int bcm54xx_auxctl_read(struct phy_device *phydev, u16 regnum)
107{
108 /* The register must be written to both the Shadow Register Select and
109 * the Shadow Read Register Selector
110 */
111 phy_write(phydev, MII_BCM54XX_AUX_CTL, MII_BCM54XX_AUXCTL_SHDWSEL_MASK |
112 regnum << MII_BCM54XX_AUXCTL_SHDWSEL_READ_SHIFT);
113 return phy_read(phydev, MII_BCM54XX_AUX_CTL);
114}
115EXPORT_SYMBOL_GPL(bcm54xx_auxctl_read);
116
117int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
118{
119 return phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum | val);
120}
121EXPORT_SYMBOL(bcm54xx_auxctl_write);
122
123int bcm_phy_write_misc(struct phy_device *phydev,
124 u16 reg, u16 chl, u16 val)
125{
126 int rc;
127 int tmp;
128
129 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL,
130 MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
131 if (rc < 0)
132 return rc;
133
134 tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
135 tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
136 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
137 if (rc < 0)
138 return rc;
139
140 tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg;
141 rc = bcm_phy_write_exp(phydev, tmp, val);
142
143 return rc;
144}
145EXPORT_SYMBOL_GPL(bcm_phy_write_misc);
146
147int bcm_phy_read_misc(struct phy_device *phydev,
148 u16 reg, u16 chl)
149{
150 int rc;
151 int tmp;
152
153 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL,
154 MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
155 if (rc < 0)
156 return rc;
157
158 tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
159 tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
160 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
161 if (rc < 0)
162 return rc;
163
164 tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg;
165 rc = bcm_phy_read_exp(phydev, tmp);
166
167 return rc;
168}
169EXPORT_SYMBOL_GPL(bcm_phy_read_misc);
170
171int bcm_phy_ack_intr(struct phy_device *phydev)
172{
173 int reg;
174
175 /* Clear pending interrupts. */
176 reg = phy_read(phydev, MII_BCM54XX_ISR);
177 if (reg < 0)
178 return reg;
179
180 return 0;
181}
182EXPORT_SYMBOL_GPL(bcm_phy_ack_intr);
183
184int bcm_phy_config_intr(struct phy_device *phydev)
185{
186 int reg, err;
187
188 reg = phy_read(phydev, MII_BCM54XX_ECR);
189 if (reg < 0)
190 return reg;
191
192 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
193 err = bcm_phy_ack_intr(phydev);
194 if (err)
195 return err;
196
197 reg &= ~MII_BCM54XX_ECR_IM;
198 err = phy_write(phydev, MII_BCM54XX_ECR, reg);
199 } else {
200 reg |= MII_BCM54XX_ECR_IM;
201 err = phy_write(phydev, MII_BCM54XX_ECR, reg);
202 if (err)
203 return err;
204
205 err = bcm_phy_ack_intr(phydev);
206 }
207 return err;
208}
209EXPORT_SYMBOL_GPL(bcm_phy_config_intr);
210
211irqreturn_t bcm_phy_handle_interrupt(struct phy_device *phydev)
212{
213 int irq_status, irq_mask;
214
215 irq_status = phy_read(phydev, MII_BCM54XX_ISR);
216 if (irq_status < 0) {
217 phy_error(phydev);
218 return IRQ_NONE;
219 }
220
221 /* If a bit from the Interrupt Mask register is set, the corresponding
222 * bit from the Interrupt Status register is masked. So read the IMR
223 * and then flip the bits to get the list of possible interrupt
224 * sources.
225 */
226 irq_mask = phy_read(phydev, MII_BCM54XX_IMR);
227 if (irq_mask < 0) {
228 phy_error(phydev);
229 return IRQ_NONE;
230 }
231 irq_mask = ~irq_mask;
232
233 if (!(irq_status & irq_mask))
234 return IRQ_NONE;
235
236 phy_trigger_machine(phydev);
237
238 return IRQ_HANDLED;
239}
240EXPORT_SYMBOL_GPL(bcm_phy_handle_interrupt);
241
242int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow)
243{
244 phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow));
245 return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD));
246}
247EXPORT_SYMBOL_GPL(bcm_phy_read_shadow);
248
249int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow,
250 u16 val)
251{
252 return phy_write(phydev, MII_BCM54XX_SHD,
253 MII_BCM54XX_SHD_WRITE |
254 MII_BCM54XX_SHD_VAL(shadow) |
255 MII_BCM54XX_SHD_DATA(val));
256}
257EXPORT_SYMBOL_GPL(bcm_phy_write_shadow);
258
259int __bcm_phy_read_rdb(struct phy_device *phydev, u16 rdb)
260{
261 int val;
262
263 val = __phy_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
264 if (val < 0)
265 return val;
266
267 return __phy_read(phydev, MII_BCM54XX_RDB_DATA);
268}
269EXPORT_SYMBOL_GPL(__bcm_phy_read_rdb);
270
271int bcm_phy_read_rdb(struct phy_device *phydev, u16 rdb)
272{
273 int ret;
274
275 phy_lock_mdio_bus(phydev);
276 ret = __bcm_phy_read_rdb(phydev, rdb);
277 phy_unlock_mdio_bus(phydev);
278
279 return ret;
280}
281EXPORT_SYMBOL_GPL(bcm_phy_read_rdb);
282
283int __bcm_phy_write_rdb(struct phy_device *phydev, u16 rdb, u16 val)
284{
285 int ret;
286
287 ret = __phy_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
288 if (ret < 0)
289 return ret;
290
291 return __phy_write(phydev, MII_BCM54XX_RDB_DATA, val);
292}
293EXPORT_SYMBOL_GPL(__bcm_phy_write_rdb);
294
295int bcm_phy_write_rdb(struct phy_device *phydev, u16 rdb, u16 val)
296{
297 int ret;
298
299 phy_lock_mdio_bus(phydev);
300 ret = __bcm_phy_write_rdb(phydev, rdb, val);
301 phy_unlock_mdio_bus(phydev);
302
303 return ret;
304}
305EXPORT_SYMBOL_GPL(bcm_phy_write_rdb);
306
307int __bcm_phy_modify_rdb(struct phy_device *phydev, u16 rdb, u16 mask, u16 set)
308{
309 int new, ret;
310
311 ret = __phy_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
312 if (ret < 0)
313 return ret;
314
315 ret = __phy_read(phydev, MII_BCM54XX_RDB_DATA);
316 if (ret < 0)
317 return ret;
318
319 new = (ret & ~mask) | set;
320 if (new == ret)
321 return 0;
322
323 return __phy_write(phydev, MII_BCM54XX_RDB_DATA, new);
324}
325EXPORT_SYMBOL_GPL(__bcm_phy_modify_rdb);
326
327int bcm_phy_modify_rdb(struct phy_device *phydev, u16 rdb, u16 mask, u16 set)
328{
329 int ret;
330
331 phy_lock_mdio_bus(phydev);
332 ret = __bcm_phy_modify_rdb(phydev, rdb, mask, set);
333 phy_unlock_mdio_bus(phydev);
334
335 return ret;
336}
337EXPORT_SYMBOL_GPL(bcm_phy_modify_rdb);
338
339int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down)
340{
341 int val;
342
343 if (dll_pwr_down) {
344 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3);
345 if (val < 0)
346 return val;
347
348 val |= BCM54XX_SHD_SCR3_DLLAPD_DIS;
349 bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val);
350 }
351
352 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_APD);
353 if (val < 0)
354 return val;
355
356 /* Clear APD bits */
357 val &= BCM_APD_CLR_MASK;
358
359 if (phydev->autoneg == AUTONEG_ENABLE)
360 val |= BCM54XX_SHD_APD_EN;
361 else
362 val |= BCM_NO_ANEG_APD_EN;
363
364 /* Enable energy detect single link pulse for easy wakeup */
365 val |= BCM_APD_SINGLELP_EN;
366
367 /* Enable Auto Power-Down (APD) for the PHY */
368 return bcm_phy_write_shadow(phydev, BCM54XX_SHD_APD, val);
369}
370EXPORT_SYMBOL_GPL(bcm_phy_enable_apd);
371
372int bcm_phy_set_eee(struct phy_device *phydev, bool enable)
373{
374 int val, mask = 0;
375
376 /* Enable EEE at PHY level */
377 val = phy_read_mmd(phydev, MDIO_MMD_AN, BRCM_CL45VEN_EEE_CONTROL);
378 if (val < 0)
379 return val;
380
381 if (enable)
382 val |= LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X;
383 else
384 val &= ~(LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X);
385
386 phy_write_mmd(phydev, MDIO_MMD_AN, BRCM_CL45VEN_EEE_CONTROL, (u32)val);
387
388 /* Advertise EEE */
389 val = phy_read_mmd(phydev, MDIO_MMD_AN, BCM_CL45VEN_EEE_ADV);
390 if (val < 0)
391 return val;
392
393 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
394 phydev->supported))
395 mask |= MDIO_EEE_1000T;
396 if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
397 phydev->supported))
398 mask |= MDIO_EEE_100TX;
399
400 if (enable)
401 val |= mask;
402 else
403 val &= ~mask;
404
405 phy_write_mmd(phydev, MDIO_MMD_AN, BCM_CL45VEN_EEE_ADV, (u32)val);
406
407 return 0;
408}
409EXPORT_SYMBOL_GPL(bcm_phy_set_eee);
410
411int bcm_phy_downshift_get(struct phy_device *phydev, u8 *count)
412{
413 int val;
414
415 val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
416 if (val < 0)
417 return val;
418
419 /* Check if wirespeed is enabled or not */
420 if (!(val & MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN)) {
421 *count = DOWNSHIFT_DEV_DISABLE;
422 return 0;
423 }
424
425 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR2);
426 if (val < 0)
427 return val;
428
429 /* Downgrade after one link attempt */
430 if (val & BCM54XX_SHD_SCR2_WSPD_RTRY_DIS) {
431 *count = 1;
432 } else {
433 /* Downgrade after configured retry count */
434 val >>= BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT;
435 val &= BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK;
436 *count = val + BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET;
437 }
438
439 return 0;
440}
441EXPORT_SYMBOL_GPL(bcm_phy_downshift_get);
442
443int bcm_phy_downshift_set(struct phy_device *phydev, u8 count)
444{
445 int val = 0, ret = 0;
446
447 /* Range check the number given */
448 if (count - BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET >
449 BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK &&
450 count != DOWNSHIFT_DEV_DEFAULT_COUNT) {
451 return -ERANGE;
452 }
453
454 val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
455 if (val < 0)
456 return val;
457
458 /* Se the write enable bit */
459 val |= MII_BCM54XX_AUXCTL_MISC_WREN;
460
461 if (count == DOWNSHIFT_DEV_DISABLE) {
462 val &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN;
463 return bcm54xx_auxctl_write(phydev,
464 MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
465 val);
466 } else {
467 val |= MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN;
468 ret = bcm54xx_auxctl_write(phydev,
469 MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
470 val);
471 if (ret < 0)
472 return ret;
473 }
474
475 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR2);
476 val &= ~(BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK <<
477 BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT |
478 BCM54XX_SHD_SCR2_WSPD_RTRY_DIS);
479
480 switch (count) {
481 case 1:
482 val |= BCM54XX_SHD_SCR2_WSPD_RTRY_DIS;
483 break;
484 case DOWNSHIFT_DEV_DEFAULT_COUNT:
485 val |= 1 << BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT;
486 break;
487 default:
488 val |= (count - BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET) <<
489 BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT;
490 break;
491 }
492
493 return bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR2, val);
494}
495EXPORT_SYMBOL_GPL(bcm_phy_downshift_set);
496
497struct bcm_phy_hw_stat {
498 const char *string;
499 int devad;
500 u16 reg;
501 u8 shift;
502 u8 bits;
503};
504
505/* Counters freeze at either 0xffff or 0xff, better than nothing */
506static const struct bcm_phy_hw_stat bcm_phy_hw_stats[] = {
507 { "phy_receive_errors", -1, MII_BRCM_CORE_BASE12, 0, 16 },
508 { "phy_serdes_ber_errors", -1, MII_BRCM_CORE_BASE13, 8, 8 },
509 { "phy_false_carrier_sense_errors", -1, MII_BRCM_CORE_BASE13, 0, 8 },
510 { "phy_local_rcvr_nok", -1, MII_BRCM_CORE_BASE14, 8, 8 },
511 { "phy_remote_rcv_nok", -1, MII_BRCM_CORE_BASE14, 0, 8 },
512 { "phy_lpi_count", MDIO_MMD_AN, BRCM_CL45VEN_EEE_LPI_CNT, 0, 16 },
513};
514
515int bcm_phy_get_sset_count(struct phy_device *phydev)
516{
517 return ARRAY_SIZE(bcm_phy_hw_stats);
518}
519EXPORT_SYMBOL_GPL(bcm_phy_get_sset_count);
520
521void bcm_phy_get_strings(struct phy_device *phydev, u8 *data)
522{
523 unsigned int i;
524
525 for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
526 ethtool_puts(&data, bcm_phy_hw_stats[i].string);
527}
528EXPORT_SYMBOL_GPL(bcm_phy_get_strings);
529
530/* Caller is supposed to provide appropriate storage for the library code to
531 * access the shadow copy
532 */
533static u64 bcm_phy_get_stat(struct phy_device *phydev, u64 *shadow,
534 unsigned int i)
535{
536 struct bcm_phy_hw_stat stat = bcm_phy_hw_stats[i];
537 int val;
538 u64 ret;
539
540 if (stat.devad < 0)
541 val = phy_read(phydev, stat.reg);
542 else
543 val = phy_read_mmd(phydev, stat.devad, stat.reg);
544 if (val < 0) {
545 ret = U64_MAX;
546 } else {
547 val >>= stat.shift;
548 val = val & ((1 << stat.bits) - 1);
549 shadow[i] += val;
550 ret = shadow[i];
551 }
552
553 return ret;
554}
555
556void bcm_phy_get_stats(struct phy_device *phydev, u64 *shadow,
557 struct ethtool_stats *stats, u64 *data)
558{
559 unsigned int i;
560
561 for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
562 data[i] = bcm_phy_get_stat(phydev, shadow, i);
563}
564EXPORT_SYMBOL_GPL(bcm_phy_get_stats);
565
566void bcm_phy_r_rc_cal_reset(struct phy_device *phydev)
567{
568 /* Reset R_CAL/RC_CAL Engine */
569 bcm_phy_write_exp_sel(phydev, 0x00b0, 0x0010);
570
571 /* Disable Reset R_AL/RC_CAL Engine */
572 bcm_phy_write_exp_sel(phydev, 0x00b0, 0x0000);
573}
574EXPORT_SYMBOL_GPL(bcm_phy_r_rc_cal_reset);
575
576int bcm_phy_28nm_a0b0_afe_config_init(struct phy_device *phydev)
577{
578 /* Increase VCO range to prevent unlocking problem of PLL at low
579 * temp
580 */
581 bcm_phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048);
582
583 /* Change Ki to 011 */
584 bcm_phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b);
585
586 /* Disable loading of TVCO buffer to bandgap, set bandgap trim
587 * to 111
588 */
589 bcm_phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20);
590
591 /* Adjust bias current trim by -3 */
592 bcm_phy_write_misc(phydev, DSP_TAP10, 0x690b);
593
594 /* Switch to CORE_BASE1E */
595 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0xd);
596
597 bcm_phy_r_rc_cal_reset(phydev);
598
599 /* write AFE_RXCONFIG_0 */
600 bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19);
601
602 /* write AFE_RXCONFIG_1 */
603 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f);
604
605 /* write AFE_RX_LP_COUNTER */
606 bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
607
608 /* write AFE_HPF_TRIM_OTHERS */
609 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b);
610
611 /* write AFTE_TX_CONFIG */
612 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800);
613
614 return 0;
615}
616EXPORT_SYMBOL_GPL(bcm_phy_28nm_a0b0_afe_config_init);
617
618int bcm_phy_enable_jumbo(struct phy_device *phydev)
619{
620 int ret;
621
622 ret = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL);
623 if (ret < 0)
624 return ret;
625
626 /* Enable extended length packet reception */
627 ret = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL,
628 ret | MII_BCM54XX_AUXCTL_ACTL_EXT_PKT_LEN);
629 if (ret < 0)
630 return ret;
631
632 /* Enable the elastic FIFO for raising the transmission limit from
633 * 4.5KB to 10KB, at the expense of an additional 16 ns in propagation
634 * latency.
635 */
636 return phy_set_bits(phydev, MII_BCM54XX_ECR, MII_BCM54XX_ECR_FIFOE);
637}
638EXPORT_SYMBOL_GPL(bcm_phy_enable_jumbo);
639
640static int __bcm_phy_enable_rdb_access(struct phy_device *phydev)
641{
642 return __bcm_phy_write_exp(phydev, BCM54XX_EXP_REG7E, 0);
643}
644
645static int __bcm_phy_enable_legacy_access(struct phy_device *phydev)
646{
647 return __bcm_phy_write_rdb(phydev, BCM54XX_RDB_REG0087,
648 BCM54XX_ACCESS_MODE_LEGACY_EN);
649}
650
651static int _bcm_phy_cable_test_start(struct phy_device *phydev, bool is_rdb)
652{
653 u16 mask, set;
654 int ret;
655
656 /* Auto-negotiation must be enabled for cable diagnostics to work, but
657 * don't advertise any capabilities.
658 */
659 phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
660 phy_write(phydev, MII_ADVERTISE, ADVERTISE_CSMA);
661 phy_write(phydev, MII_CTRL1000, 0);
662
663 phy_lock_mdio_bus(phydev);
664 if (is_rdb) {
665 ret = __bcm_phy_enable_legacy_access(phydev);
666 if (ret)
667 goto out;
668 }
669
670 mask = BCM54XX_ECD_CTRL_CROSS_SHORT_DIS | BCM54XX_ECD_CTRL_UNIT_MASK;
671 set = BCM54XX_ECD_CTRL_RUN | BCM54XX_ECD_CTRL_BREAK_LINK |
672 FIELD_PREP(BCM54XX_ECD_CTRL_UNIT_MASK,
673 BCM54XX_ECD_CTRL_UNIT_CM);
674
675 ret = __bcm_phy_modify_exp(phydev, BCM54XX_EXP_ECD_CTRL, mask, set);
676
677out:
678 /* re-enable the RDB access even if there was an error */
679 if (is_rdb)
680 ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
681
682 phy_unlock_mdio_bus(phydev);
683
684 return ret;
685}
686
687static int bcm_phy_cable_test_report_trans(int result)
688{
689 switch (result) {
690 case BCM54XX_ECD_FAULT_TYPE_OK:
691 return ETHTOOL_A_CABLE_RESULT_CODE_OK;
692 case BCM54XX_ECD_FAULT_TYPE_OPEN:
693 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
694 case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
695 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
696 case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
697 return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
698 case BCM54XX_ECD_FAULT_TYPE_INVALID:
699 case BCM54XX_ECD_FAULT_TYPE_BUSY:
700 default:
701 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
702 }
703}
704
705static bool bcm_phy_distance_valid(int result)
706{
707 switch (result) {
708 case BCM54XX_ECD_FAULT_TYPE_OPEN:
709 case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
710 case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
711 return true;
712 }
713 return false;
714}
715
716static int bcm_phy_report_length(struct phy_device *phydev, int pair)
717{
718 int val;
719
720 val = __bcm_phy_read_exp(phydev,
721 BCM54XX_EXP_ECD_PAIR_A_LENGTH_RESULTS + pair);
722 if (val < 0)
723 return val;
724
725 if (val == BCM54XX_ECD_LENGTH_RESULTS_INVALID)
726 return 0;
727
728 ethnl_cable_test_fault_length(phydev, pair, val);
729
730 return 0;
731}
732
733static int _bcm_phy_cable_test_get_status(struct phy_device *phydev,
734 bool *finished, bool is_rdb)
735{
736 int pair_a, pair_b, pair_c, pair_d, ret;
737
738 *finished = false;
739
740 phy_lock_mdio_bus(phydev);
741
742 if (is_rdb) {
743 ret = __bcm_phy_enable_legacy_access(phydev);
744 if (ret)
745 goto out;
746 }
747
748 ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_CTRL);
749 if (ret < 0)
750 goto out;
751
752 if (ret & BCM54XX_ECD_CTRL_IN_PROGRESS) {
753 ret = 0;
754 goto out;
755 }
756
757 ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_FAULT_TYPE);
758 if (ret < 0)
759 goto out;
760
761 pair_a = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_A_MASK, ret);
762 pair_b = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_B_MASK, ret);
763 pair_c = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_C_MASK, ret);
764 pair_d = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_D_MASK, ret);
765
766 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
767 bcm_phy_cable_test_report_trans(pair_a));
768 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_B,
769 bcm_phy_cable_test_report_trans(pair_b));
770 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_C,
771 bcm_phy_cable_test_report_trans(pair_c));
772 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_D,
773 bcm_phy_cable_test_report_trans(pair_d));
774
775 if (bcm_phy_distance_valid(pair_a))
776 bcm_phy_report_length(phydev, 0);
777 if (bcm_phy_distance_valid(pair_b))
778 bcm_phy_report_length(phydev, 1);
779 if (bcm_phy_distance_valid(pair_c))
780 bcm_phy_report_length(phydev, 2);
781 if (bcm_phy_distance_valid(pair_d))
782 bcm_phy_report_length(phydev, 3);
783
784 ret = 0;
785 *finished = true;
786out:
787 /* re-enable the RDB access even if there was an error */
788 if (is_rdb)
789 ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
790
791 phy_unlock_mdio_bus(phydev);
792
793 return ret;
794}
795
796static int bcm_setup_lre_forced(struct phy_device *phydev)
797{
798 u16 ctl = 0;
799
800 phydev->pause = 0;
801 phydev->asym_pause = 0;
802
803 if (phydev->speed == SPEED_100)
804 ctl |= LRECR_SPEED100;
805
806 if (phydev->duplex != DUPLEX_FULL)
807 return -EOPNOTSUPP;
808
809 return phy_modify(phydev, MII_BCM54XX_LRECR, LRECR_SPEED100, ctl);
810}
811
812/**
813 * bcm_linkmode_adv_to_lre_adv_t - translate linkmode advertisement to LDS
814 * @advertising: the linkmode advertisement settings
815 * Return: LDS Auto-Negotiation Advertised Ability register value
816 *
817 * A small helper function that translates linkmode advertisement
818 * settings to phy LDS autonegotiation advertisements for the
819 * MII_BCM54XX_LREANAA register of Broadcom PHYs capable of LDS
820 */
821static u32 bcm_linkmode_adv_to_lre_adv_t(unsigned long *advertising)
822{
823 u32 result = 0;
824
825 if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1BRR_Full_BIT,
826 advertising))
827 result |= LREANAA_10_1PAIR;
828 if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT1_Full_BIT,
829 advertising))
830 result |= LREANAA_100_1PAIR;
831 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
832 result |= LRELPA_PAUSE;
833 if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
834 result |= LRELPA_PAUSE_ASYM;
835
836 return result;
837}
838
839int bcm_phy_cable_test_start(struct phy_device *phydev)
840{
841 return _bcm_phy_cable_test_start(phydev, false);
842}
843EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start);
844
845int bcm_phy_cable_test_get_status(struct phy_device *phydev, bool *finished)
846{
847 return _bcm_phy_cable_test_get_status(phydev, finished, false);
848}
849EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status);
850
851/* We assume that all PHYs which support RDB access can be switched to legacy
852 * mode. If, in the future, this is not true anymore, we have to re-implement
853 * this with RDB access.
854 */
855int bcm_phy_cable_test_start_rdb(struct phy_device *phydev)
856{
857 return _bcm_phy_cable_test_start(phydev, true);
858}
859EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start_rdb);
860
861int bcm_phy_cable_test_get_status_rdb(struct phy_device *phydev,
862 bool *finished)
863{
864 return _bcm_phy_cable_test_get_status(phydev, finished, true);
865}
866EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status_rdb);
867
868#define BCM54XX_WOL_SUPPORTED_MASK (WAKE_UCAST | \
869 WAKE_MCAST | \
870 WAKE_BCAST | \
871 WAKE_MAGIC | \
872 WAKE_MAGICSECURE)
873
874int bcm_phy_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
875{
876 struct net_device *ndev = phydev->attached_dev;
877 u8 da[ETH_ALEN], mask[ETH_ALEN];
878 unsigned int i;
879 u16 ctl;
880 int ret;
881
882 /* Allow a MAC driver to play through its own Wake-on-LAN
883 * implementation
884 */
885 if (wol->wolopts & ~BCM54XX_WOL_SUPPORTED_MASK)
886 return -EOPNOTSUPP;
887
888 /* The PHY supports passwords of 4, 6 and 8 bytes in size, but Linux's
889 * ethtool only supports 6, for now.
890 */
891 BUILD_BUG_ON(sizeof(wol->sopass) != ETH_ALEN);
892
893 /* Clear previous interrupts */
894 ret = bcm_phy_read_exp(phydev, BCM54XX_WOL_INT_STATUS);
895 if (ret < 0)
896 return ret;
897
898 ret = bcm_phy_read_exp(phydev, BCM54XX_WOL_MAIN_CTL);
899 if (ret < 0)
900 return ret;
901
902 ctl = ret;
903
904 if (!wol->wolopts) {
905 if (phy_interrupt_is_valid(phydev))
906 disable_irq_wake(phydev->irq);
907
908 /* Leave all interrupts disabled */
909 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_INT_MASK,
910 BCM54XX_WOL_ALL_INTRS);
911 if (ret < 0)
912 return ret;
913
914 /* Disable the global Wake-on-LAN enable bit */
915 ctl &= ~BCM54XX_WOL_EN;
916
917 return bcm_phy_write_exp(phydev, BCM54XX_WOL_MAIN_CTL, ctl);
918 }
919
920 /* Clear the previously configured mode and mask mode for Wake-on-LAN */
921 ctl &= ~(BCM54XX_WOL_MODE_MASK << BCM54XX_WOL_MODE_SHIFT);
922 ctl &= ~(BCM54XX_WOL_MASK_MODE_MASK << BCM54XX_WOL_MASK_MODE_SHIFT);
923 ctl &= ~BCM54XX_WOL_DIR_PKT_EN;
924 ctl &= ~(BCM54XX_WOL_SECKEY_OPT_MASK << BCM54XX_WOL_SECKEY_OPT_SHIFT);
925
926 /* When using WAKE_MAGIC, we program the magic pattern filter to match
927 * the device's MAC address and we accept any MAC DA in the Ethernet
928 * frame.
929 *
930 * When using WAKE_UCAST, WAKE_BCAST or WAKE_MCAST, we program the
931 * following:
932 * - WAKE_UCAST -> MAC DA is the device's MAC with a perfect match
933 * - WAKE_MCAST -> MAC DA is X1:XX:XX:XX:XX:XX where XX is don't care
934 * - WAKE_BCAST -> MAC DA is FF:FF:FF:FF:FF:FF with a perfect match
935 *
936 * Note that the Broadcast MAC DA is inherently going to match the
937 * multicast pattern being matched.
938 */
939 memset(mask, 0, sizeof(mask));
940
941 if (wol->wolopts & WAKE_MCAST) {
942 memset(da, 0, sizeof(da));
943 memset(mask, 0xff, sizeof(mask));
944 da[0] = 0x01;
945 mask[0] = ~da[0];
946 } else {
947 if (wol->wolopts & WAKE_UCAST) {
948 ether_addr_copy(da, ndev->dev_addr);
949 } else if (wol->wolopts & WAKE_BCAST) {
950 eth_broadcast_addr(da);
951 } else if (wol->wolopts & WAKE_MAGICSECURE) {
952 ether_addr_copy(da, wol->sopass);
953 } else if (wol->wolopts & WAKE_MAGIC) {
954 memset(da, 0, sizeof(da));
955 memset(mask, 0xff, sizeof(mask));
956 }
957 }
958
959 for (i = 0; i < ETH_ALEN / 2; i++) {
960 if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
961 ret = bcm_phy_write_exp(phydev,
962 BCM54XX_WOL_MPD_DATA1(2 - i),
963 ndev->dev_addr[i * 2] << 8 |
964 ndev->dev_addr[i * 2 + 1]);
965 if (ret < 0)
966 return ret;
967 }
968
969 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_MPD_DATA2(2 - i),
970 da[i * 2] << 8 | da[i * 2 + 1]);
971 if (ret < 0)
972 return ret;
973
974 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_MASK(2 - i),
975 mask[i * 2] << 8 | mask[i * 2 + 1]);
976 if (ret)
977 return ret;
978 }
979
980 if (wol->wolopts & WAKE_MAGICSECURE) {
981 ctl |= BCM54XX_WOL_SECKEY_OPT_6B <<
982 BCM54XX_WOL_SECKEY_OPT_SHIFT;
983 ctl |= BCM54XX_WOL_MODE_SINGLE_MPDSEC << BCM54XX_WOL_MODE_SHIFT;
984 ctl |= BCM54XX_WOL_MASK_MODE_DA_FF <<
985 BCM54XX_WOL_MASK_MODE_SHIFT;
986 } else {
987 if (wol->wolopts & WAKE_MAGIC)
988 ctl |= BCM54XX_WOL_MODE_SINGLE_MPD;
989 else
990 ctl |= BCM54XX_WOL_DIR_PKT_EN;
991 ctl |= BCM54XX_WOL_MASK_MODE_DA_ONLY <<
992 BCM54XX_WOL_MASK_MODE_SHIFT;
993 }
994
995 /* Globally enable Wake-on-LAN */
996 ctl |= BCM54XX_WOL_EN | BCM54XX_WOL_CRC_CHK;
997
998 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_MAIN_CTL, ctl);
999 if (ret < 0)
1000 return ret;
1001
1002 /* Enable WOL interrupt on LED4 */
1003 ret = bcm_phy_read_exp(phydev, BCM54XX_TOP_MISC_LED_CTL);
1004 if (ret < 0)
1005 return ret;
1006
1007 ret |= BCM54XX_LED4_SEL_INTR;
1008 ret = bcm_phy_write_exp(phydev, BCM54XX_TOP_MISC_LED_CTL, ret);
1009 if (ret < 0)
1010 return ret;
1011
1012 /* Enable all Wake-on-LAN interrupt sources */
1013 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_INT_MASK, 0);
1014 if (ret < 0)
1015 return ret;
1016
1017 if (phy_interrupt_is_valid(phydev))
1018 enable_irq_wake(phydev->irq);
1019
1020 return 0;
1021}
1022EXPORT_SYMBOL_GPL(bcm_phy_set_wol);
1023
1024void bcm_phy_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
1025{
1026 struct net_device *ndev = phydev->attached_dev;
1027 u8 da[ETH_ALEN];
1028 unsigned int i;
1029 int ret;
1030 u16 ctl;
1031
1032 wol->supported = BCM54XX_WOL_SUPPORTED_MASK;
1033 wol->wolopts = 0;
1034
1035 ret = bcm_phy_read_exp(phydev, BCM54XX_WOL_MAIN_CTL);
1036 if (ret < 0)
1037 return;
1038
1039 ctl = ret;
1040
1041 if (!(ctl & BCM54XX_WOL_EN))
1042 return;
1043
1044 for (i = 0; i < sizeof(da) / 2; i++) {
1045 ret = bcm_phy_read_exp(phydev,
1046 BCM54XX_WOL_MPD_DATA2(2 - i));
1047 if (ret < 0)
1048 return;
1049
1050 da[i * 2] = ret >> 8;
1051 da[i * 2 + 1] = ret & 0xff;
1052 }
1053
1054 if (ctl & BCM54XX_WOL_DIR_PKT_EN) {
1055 if (is_broadcast_ether_addr(da))
1056 wol->wolopts |= WAKE_BCAST;
1057 else if (is_multicast_ether_addr(da))
1058 wol->wolopts |= WAKE_MCAST;
1059 else if (ether_addr_equal(da, ndev->dev_addr))
1060 wol->wolopts |= WAKE_UCAST;
1061 } else {
1062 ctl = (ctl >> BCM54XX_WOL_MODE_SHIFT) & BCM54XX_WOL_MODE_MASK;
1063 switch (ctl) {
1064 case BCM54XX_WOL_MODE_SINGLE_MPD:
1065 wol->wolopts |= WAKE_MAGIC;
1066 break;
1067 case BCM54XX_WOL_MODE_SINGLE_MPDSEC:
1068 wol->wolopts |= WAKE_MAGICSECURE;
1069 memcpy(wol->sopass, da, sizeof(da));
1070 break;
1071 default:
1072 break;
1073 }
1074 }
1075}
1076EXPORT_SYMBOL_GPL(bcm_phy_get_wol);
1077
1078irqreturn_t bcm_phy_wol_isr(int irq, void *dev_id)
1079{
1080 return IRQ_HANDLED;
1081}
1082EXPORT_SYMBOL_GPL(bcm_phy_wol_isr);
1083
1084int bcm_phy_led_brightness_set(struct phy_device *phydev,
1085 u8 index, enum led_brightness value)
1086{
1087 u8 led_num;
1088 int ret;
1089 u16 reg;
1090
1091 if (index >= 4)
1092 return -EINVAL;
1093
1094 /* Two LEDS per register */
1095 led_num = index % 2;
1096 reg = index >= 2 ? BCM54XX_SHD_LEDS2 : BCM54XX_SHD_LEDS1;
1097
1098 ret = bcm_phy_read_shadow(phydev, reg);
1099 if (ret < 0)
1100 return ret;
1101
1102 ret &= ~(BCM_LED_SRC_MASK << BCM54XX_SHD_LEDS_SHIFT(led_num));
1103 if (value == LED_OFF)
1104 ret |= BCM_LED_SRC_OFF << BCM54XX_SHD_LEDS_SHIFT(led_num);
1105 else
1106 ret |= BCM_LED_SRC_ON << BCM54XX_SHD_LEDS_SHIFT(led_num);
1107 return bcm_phy_write_shadow(phydev, reg, ret);
1108}
1109EXPORT_SYMBOL_GPL(bcm_phy_led_brightness_set);
1110
1111int bcm_setup_lre_master_slave(struct phy_device *phydev)
1112{
1113 u16 ctl = 0;
1114
1115 switch (phydev->master_slave_set) {
1116 case MASTER_SLAVE_CFG_MASTER_PREFERRED:
1117 case MASTER_SLAVE_CFG_MASTER_FORCE:
1118 ctl = LRECR_MASTER;
1119 break;
1120 case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
1121 case MASTER_SLAVE_CFG_SLAVE_FORCE:
1122 break;
1123 case MASTER_SLAVE_CFG_UNKNOWN:
1124 case MASTER_SLAVE_CFG_UNSUPPORTED:
1125 return 0;
1126 default:
1127 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
1128 return -EOPNOTSUPP;
1129 }
1130
1131 return phy_modify_changed(phydev, MII_BCM54XX_LRECR, LRECR_MASTER, ctl);
1132}
1133EXPORT_SYMBOL_GPL(bcm_setup_lre_master_slave);
1134
1135int bcm_config_lre_aneg(struct phy_device *phydev, bool changed)
1136{
1137 int err;
1138
1139 if (genphy_c45_an_config_eee_aneg(phydev) > 0)
1140 changed = true;
1141
1142 err = bcm_setup_lre_master_slave(phydev);
1143 if (err < 0)
1144 return err;
1145 else if (err)
1146 changed = true;
1147
1148 if (phydev->autoneg != AUTONEG_ENABLE)
1149 return bcm_setup_lre_forced(phydev);
1150
1151 err = bcm_config_lre_advert(phydev);
1152 if (err < 0)
1153 return err;
1154 else if (err)
1155 changed = true;
1156
1157 return genphy_check_and_restart_aneg(phydev, changed);
1158}
1159EXPORT_SYMBOL_GPL(bcm_config_lre_aneg);
1160
1161/**
1162 * bcm_config_lre_advert - sanitize and advertise Long-Distance Signaling
1163 * auto-negotiation parameters
1164 * @phydev: target phy_device struct
1165 * Return: 0 if the PHY's advertisement hasn't changed, < 0 on error,
1166 * > 0 if it has changed
1167 *
1168 * Writes MII_BCM54XX_LREANAA with the appropriate values. The values are to be
1169 * sanitized before, to make sure we only advertise what is supported.
1170 * The sanitization is done already in phy_ethtool_ksettings_set()
1171 */
1172int bcm_config_lre_advert(struct phy_device *phydev)
1173{
1174 u32 adv = bcm_linkmode_adv_to_lre_adv_t(phydev->advertising);
1175
1176 /* Setup BroadR-Reach mode advertisement */
1177 return phy_modify_changed(phydev, MII_BCM54XX_LREANAA,
1178 LRE_ADVERTISE_ALL | LREANAA_PAUSE |
1179 LREANAA_PAUSE_ASYM, adv);
1180}
1181EXPORT_SYMBOL_GPL(bcm_config_lre_advert);
1182
1183MODULE_DESCRIPTION("Broadcom PHY Library");
1184MODULE_LICENSE("GPL v2");
1185MODULE_AUTHOR("Broadcom Corporation");
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2015-2017 Broadcom
4 */
5
6#include "bcm-phy-lib.h"
7#include <linux/bitfield.h>
8#include <linux/brcmphy.h>
9#include <linux/export.h>
10#include <linux/mdio.h>
11#include <linux/module.h>
12#include <linux/phy.h>
13#include <linux/ethtool.h>
14#include <linux/ethtool_netlink.h>
15
16#define MII_BCM_CHANNEL_WIDTH 0x2000
17#define BCM_CL45VEN_EEE_ADV 0x3c
18
19int __bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
20{
21 int rc;
22
23 rc = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
24 if (rc < 0)
25 return rc;
26
27 return __phy_write(phydev, MII_BCM54XX_EXP_DATA, val);
28}
29EXPORT_SYMBOL_GPL(__bcm_phy_write_exp);
30
31int bcm_phy_write_exp(struct phy_device *phydev, u16 reg, u16 val)
32{
33 int rc;
34
35 phy_lock_mdio_bus(phydev);
36 rc = __bcm_phy_write_exp(phydev, reg, val);
37 phy_unlock_mdio_bus(phydev);
38
39 return rc;
40}
41EXPORT_SYMBOL_GPL(bcm_phy_write_exp);
42
43int __bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
44{
45 int val;
46
47 val = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
48 if (val < 0)
49 return val;
50
51 val = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
52
53 /* Restore default value. It's O.K. if this write fails. */
54 __phy_write(phydev, MII_BCM54XX_EXP_SEL, 0);
55
56 return val;
57}
58EXPORT_SYMBOL_GPL(__bcm_phy_read_exp);
59
60int bcm_phy_read_exp(struct phy_device *phydev, u16 reg)
61{
62 int rc;
63
64 phy_lock_mdio_bus(phydev);
65 rc = __bcm_phy_read_exp(phydev, reg);
66 phy_unlock_mdio_bus(phydev);
67
68 return rc;
69}
70EXPORT_SYMBOL_GPL(bcm_phy_read_exp);
71
72int __bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set)
73{
74 int new, ret;
75
76 ret = __phy_write(phydev, MII_BCM54XX_EXP_SEL, reg);
77 if (ret < 0)
78 return ret;
79
80 ret = __phy_read(phydev, MII_BCM54XX_EXP_DATA);
81 if (ret < 0)
82 return ret;
83
84 new = (ret & ~mask) | set;
85 if (new == ret)
86 return 0;
87
88 return __phy_write(phydev, MII_BCM54XX_EXP_DATA, new);
89}
90EXPORT_SYMBOL_GPL(__bcm_phy_modify_exp);
91
92int bcm_phy_modify_exp(struct phy_device *phydev, u16 reg, u16 mask, u16 set)
93{
94 int ret;
95
96 phy_lock_mdio_bus(phydev);
97 ret = __bcm_phy_modify_exp(phydev, reg, mask, set);
98 phy_unlock_mdio_bus(phydev);
99
100 return ret;
101}
102EXPORT_SYMBOL_GPL(bcm_phy_modify_exp);
103
104int bcm54xx_auxctl_read(struct phy_device *phydev, u16 regnum)
105{
106 /* The register must be written to both the Shadow Register Select and
107 * the Shadow Read Register Selector
108 */
109 phy_write(phydev, MII_BCM54XX_AUX_CTL, MII_BCM54XX_AUXCTL_SHDWSEL_MASK |
110 regnum << MII_BCM54XX_AUXCTL_SHDWSEL_READ_SHIFT);
111 return phy_read(phydev, MII_BCM54XX_AUX_CTL);
112}
113EXPORT_SYMBOL_GPL(bcm54xx_auxctl_read);
114
115int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
116{
117 return phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum | val);
118}
119EXPORT_SYMBOL(bcm54xx_auxctl_write);
120
121int bcm_phy_write_misc(struct phy_device *phydev,
122 u16 reg, u16 chl, u16 val)
123{
124 int rc;
125 int tmp;
126
127 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL,
128 MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
129 if (rc < 0)
130 return rc;
131
132 tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
133 tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
134 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
135 if (rc < 0)
136 return rc;
137
138 tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg;
139 rc = bcm_phy_write_exp(phydev, tmp, val);
140
141 return rc;
142}
143EXPORT_SYMBOL_GPL(bcm_phy_write_misc);
144
145int bcm_phy_read_misc(struct phy_device *phydev,
146 u16 reg, u16 chl)
147{
148 int rc;
149 int tmp;
150
151 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL,
152 MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
153 if (rc < 0)
154 return rc;
155
156 tmp = phy_read(phydev, MII_BCM54XX_AUX_CTL);
157 tmp |= MII_BCM54XX_AUXCTL_ACTL_SMDSP_ENA;
158 rc = phy_write(phydev, MII_BCM54XX_AUX_CTL, tmp);
159 if (rc < 0)
160 return rc;
161
162 tmp = (chl * MII_BCM_CHANNEL_WIDTH) | reg;
163 rc = bcm_phy_read_exp(phydev, tmp);
164
165 return rc;
166}
167EXPORT_SYMBOL_GPL(bcm_phy_read_misc);
168
169int bcm_phy_ack_intr(struct phy_device *phydev)
170{
171 int reg;
172
173 /* Clear pending interrupts. */
174 reg = phy_read(phydev, MII_BCM54XX_ISR);
175 if (reg < 0)
176 return reg;
177
178 return 0;
179}
180EXPORT_SYMBOL_GPL(bcm_phy_ack_intr);
181
182int bcm_phy_config_intr(struct phy_device *phydev)
183{
184 int reg, err;
185
186 reg = phy_read(phydev, MII_BCM54XX_ECR);
187 if (reg < 0)
188 return reg;
189
190 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
191 err = bcm_phy_ack_intr(phydev);
192 if (err)
193 return err;
194
195 reg &= ~MII_BCM54XX_ECR_IM;
196 err = phy_write(phydev, MII_BCM54XX_ECR, reg);
197 } else {
198 reg |= MII_BCM54XX_ECR_IM;
199 err = phy_write(phydev, MII_BCM54XX_ECR, reg);
200 if (err)
201 return err;
202
203 err = bcm_phy_ack_intr(phydev);
204 }
205 return err;
206}
207EXPORT_SYMBOL_GPL(bcm_phy_config_intr);
208
209irqreturn_t bcm_phy_handle_interrupt(struct phy_device *phydev)
210{
211 int irq_status, irq_mask;
212
213 irq_status = phy_read(phydev, MII_BCM54XX_ISR);
214 if (irq_status < 0) {
215 phy_error(phydev);
216 return IRQ_NONE;
217 }
218
219 /* If a bit from the Interrupt Mask register is set, the corresponding
220 * bit from the Interrupt Status register is masked. So read the IMR
221 * and then flip the bits to get the list of possible interrupt
222 * sources.
223 */
224 irq_mask = phy_read(phydev, MII_BCM54XX_IMR);
225 if (irq_mask < 0) {
226 phy_error(phydev);
227 return IRQ_NONE;
228 }
229 irq_mask = ~irq_mask;
230
231 if (!(irq_status & irq_mask))
232 return IRQ_NONE;
233
234 phy_trigger_machine(phydev);
235
236 return IRQ_HANDLED;
237}
238EXPORT_SYMBOL_GPL(bcm_phy_handle_interrupt);
239
240int bcm_phy_read_shadow(struct phy_device *phydev, u16 shadow)
241{
242 phy_write(phydev, MII_BCM54XX_SHD, MII_BCM54XX_SHD_VAL(shadow));
243 return MII_BCM54XX_SHD_DATA(phy_read(phydev, MII_BCM54XX_SHD));
244}
245EXPORT_SYMBOL_GPL(bcm_phy_read_shadow);
246
247int bcm_phy_write_shadow(struct phy_device *phydev, u16 shadow,
248 u16 val)
249{
250 return phy_write(phydev, MII_BCM54XX_SHD,
251 MII_BCM54XX_SHD_WRITE |
252 MII_BCM54XX_SHD_VAL(shadow) |
253 MII_BCM54XX_SHD_DATA(val));
254}
255EXPORT_SYMBOL_GPL(bcm_phy_write_shadow);
256
257int __bcm_phy_read_rdb(struct phy_device *phydev, u16 rdb)
258{
259 int val;
260
261 val = __phy_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
262 if (val < 0)
263 return val;
264
265 return __phy_read(phydev, MII_BCM54XX_RDB_DATA);
266}
267EXPORT_SYMBOL_GPL(__bcm_phy_read_rdb);
268
269int bcm_phy_read_rdb(struct phy_device *phydev, u16 rdb)
270{
271 int ret;
272
273 phy_lock_mdio_bus(phydev);
274 ret = __bcm_phy_read_rdb(phydev, rdb);
275 phy_unlock_mdio_bus(phydev);
276
277 return ret;
278}
279EXPORT_SYMBOL_GPL(bcm_phy_read_rdb);
280
281int __bcm_phy_write_rdb(struct phy_device *phydev, u16 rdb, u16 val)
282{
283 int ret;
284
285 ret = __phy_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
286 if (ret < 0)
287 return ret;
288
289 return __phy_write(phydev, MII_BCM54XX_RDB_DATA, val);
290}
291EXPORT_SYMBOL_GPL(__bcm_phy_write_rdb);
292
293int bcm_phy_write_rdb(struct phy_device *phydev, u16 rdb, u16 val)
294{
295 int ret;
296
297 phy_lock_mdio_bus(phydev);
298 ret = __bcm_phy_write_rdb(phydev, rdb, val);
299 phy_unlock_mdio_bus(phydev);
300
301 return ret;
302}
303EXPORT_SYMBOL_GPL(bcm_phy_write_rdb);
304
305int __bcm_phy_modify_rdb(struct phy_device *phydev, u16 rdb, u16 mask, u16 set)
306{
307 int new, ret;
308
309 ret = __phy_write(phydev, MII_BCM54XX_RDB_ADDR, rdb);
310 if (ret < 0)
311 return ret;
312
313 ret = __phy_read(phydev, MII_BCM54XX_RDB_DATA);
314 if (ret < 0)
315 return ret;
316
317 new = (ret & ~mask) | set;
318 if (new == ret)
319 return 0;
320
321 return __phy_write(phydev, MII_BCM54XX_RDB_DATA, new);
322}
323EXPORT_SYMBOL_GPL(__bcm_phy_modify_rdb);
324
325int bcm_phy_modify_rdb(struct phy_device *phydev, u16 rdb, u16 mask, u16 set)
326{
327 int ret;
328
329 phy_lock_mdio_bus(phydev);
330 ret = __bcm_phy_modify_rdb(phydev, rdb, mask, set);
331 phy_unlock_mdio_bus(phydev);
332
333 return ret;
334}
335EXPORT_SYMBOL_GPL(bcm_phy_modify_rdb);
336
337int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down)
338{
339 int val;
340
341 if (dll_pwr_down) {
342 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3);
343 if (val < 0)
344 return val;
345
346 val |= BCM54XX_SHD_SCR3_DLLAPD_DIS;
347 bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val);
348 }
349
350 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_APD);
351 if (val < 0)
352 return val;
353
354 /* Clear APD bits */
355 val &= BCM_APD_CLR_MASK;
356
357 if (phydev->autoneg == AUTONEG_ENABLE)
358 val |= BCM54XX_SHD_APD_EN;
359 else
360 val |= BCM_NO_ANEG_APD_EN;
361
362 /* Enable energy detect single link pulse for easy wakeup */
363 val |= BCM_APD_SINGLELP_EN;
364
365 /* Enable Auto Power-Down (APD) for the PHY */
366 return bcm_phy_write_shadow(phydev, BCM54XX_SHD_APD, val);
367}
368EXPORT_SYMBOL_GPL(bcm_phy_enable_apd);
369
370int bcm_phy_set_eee(struct phy_device *phydev, bool enable)
371{
372 int val, mask = 0;
373
374 /* Enable EEE at PHY level */
375 val = phy_read_mmd(phydev, MDIO_MMD_AN, BRCM_CL45VEN_EEE_CONTROL);
376 if (val < 0)
377 return val;
378
379 if (enable)
380 val |= LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X;
381 else
382 val &= ~(LPI_FEATURE_EN | LPI_FEATURE_EN_DIG1000X);
383
384 phy_write_mmd(phydev, MDIO_MMD_AN, BRCM_CL45VEN_EEE_CONTROL, (u32)val);
385
386 /* Advertise EEE */
387 val = phy_read_mmd(phydev, MDIO_MMD_AN, BCM_CL45VEN_EEE_ADV);
388 if (val < 0)
389 return val;
390
391 if (linkmode_test_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
392 phydev->supported))
393 mask |= MDIO_EEE_1000T;
394 if (linkmode_test_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
395 phydev->supported))
396 mask |= MDIO_EEE_100TX;
397
398 if (enable)
399 val |= mask;
400 else
401 val &= ~mask;
402
403 phy_write_mmd(phydev, MDIO_MMD_AN, BCM_CL45VEN_EEE_ADV, (u32)val);
404
405 return 0;
406}
407EXPORT_SYMBOL_GPL(bcm_phy_set_eee);
408
409int bcm_phy_downshift_get(struct phy_device *phydev, u8 *count)
410{
411 int val;
412
413 val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
414 if (val < 0)
415 return val;
416
417 /* Check if wirespeed is enabled or not */
418 if (!(val & MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN)) {
419 *count = DOWNSHIFT_DEV_DISABLE;
420 return 0;
421 }
422
423 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR2);
424 if (val < 0)
425 return val;
426
427 /* Downgrade after one link attempt */
428 if (val & BCM54XX_SHD_SCR2_WSPD_RTRY_DIS) {
429 *count = 1;
430 } else {
431 /* Downgrade after configured retry count */
432 val >>= BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT;
433 val &= BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK;
434 *count = val + BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET;
435 }
436
437 return 0;
438}
439EXPORT_SYMBOL_GPL(bcm_phy_downshift_get);
440
441int bcm_phy_downshift_set(struct phy_device *phydev, u8 count)
442{
443 int val = 0, ret = 0;
444
445 /* Range check the number given */
446 if (count - BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET >
447 BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK &&
448 count != DOWNSHIFT_DEV_DEFAULT_COUNT) {
449 return -ERANGE;
450 }
451
452 val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC);
453 if (val < 0)
454 return val;
455
456 /* Se the write enable bit */
457 val |= MII_BCM54XX_AUXCTL_MISC_WREN;
458
459 if (count == DOWNSHIFT_DEV_DISABLE) {
460 val &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN;
461 return bcm54xx_auxctl_write(phydev,
462 MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
463 val);
464 } else {
465 val |= MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN;
466 ret = bcm54xx_auxctl_write(phydev,
467 MII_BCM54XX_AUXCTL_SHDWSEL_MISC,
468 val);
469 if (ret < 0)
470 return ret;
471 }
472
473 val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR2);
474 val &= ~(BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK <<
475 BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT |
476 BCM54XX_SHD_SCR2_WSPD_RTRY_DIS);
477
478 switch (count) {
479 case 1:
480 val |= BCM54XX_SHD_SCR2_WSPD_RTRY_DIS;
481 break;
482 case DOWNSHIFT_DEV_DEFAULT_COUNT:
483 val |= 1 << BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT;
484 break;
485 default:
486 val |= (count - BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET) <<
487 BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT;
488 break;
489 }
490
491 return bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR2, val);
492}
493EXPORT_SYMBOL_GPL(bcm_phy_downshift_set);
494
495struct bcm_phy_hw_stat {
496 const char *string;
497 u8 reg;
498 u8 shift;
499 u8 bits;
500};
501
502/* Counters freeze at either 0xffff or 0xff, better than nothing */
503static const struct bcm_phy_hw_stat bcm_phy_hw_stats[] = {
504 { "phy_receive_errors", MII_BRCM_CORE_BASE12, 0, 16 },
505 { "phy_serdes_ber_errors", MII_BRCM_CORE_BASE13, 8, 8 },
506 { "phy_false_carrier_sense_errors", MII_BRCM_CORE_BASE13, 0, 8 },
507 { "phy_local_rcvr_nok", MII_BRCM_CORE_BASE14, 8, 8 },
508 { "phy_remote_rcv_nok", MII_BRCM_CORE_BASE14, 0, 8 },
509};
510
511int bcm_phy_get_sset_count(struct phy_device *phydev)
512{
513 return ARRAY_SIZE(bcm_phy_hw_stats);
514}
515EXPORT_SYMBOL_GPL(bcm_phy_get_sset_count);
516
517void bcm_phy_get_strings(struct phy_device *phydev, u8 *data)
518{
519 unsigned int i;
520
521 for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
522 strscpy(data + i * ETH_GSTRING_LEN,
523 bcm_phy_hw_stats[i].string, ETH_GSTRING_LEN);
524}
525EXPORT_SYMBOL_GPL(bcm_phy_get_strings);
526
527/* Caller is supposed to provide appropriate storage for the library code to
528 * access the shadow copy
529 */
530static u64 bcm_phy_get_stat(struct phy_device *phydev, u64 *shadow,
531 unsigned int i)
532{
533 struct bcm_phy_hw_stat stat = bcm_phy_hw_stats[i];
534 int val;
535 u64 ret;
536
537 val = phy_read(phydev, stat.reg);
538 if (val < 0) {
539 ret = U64_MAX;
540 } else {
541 val >>= stat.shift;
542 val = val & ((1 << stat.bits) - 1);
543 shadow[i] += val;
544 ret = shadow[i];
545 }
546
547 return ret;
548}
549
550void bcm_phy_get_stats(struct phy_device *phydev, u64 *shadow,
551 struct ethtool_stats *stats, u64 *data)
552{
553 unsigned int i;
554
555 for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
556 data[i] = bcm_phy_get_stat(phydev, shadow, i);
557}
558EXPORT_SYMBOL_GPL(bcm_phy_get_stats);
559
560void bcm_phy_r_rc_cal_reset(struct phy_device *phydev)
561{
562 /* Reset R_CAL/RC_CAL Engine */
563 bcm_phy_write_exp_sel(phydev, 0x00b0, 0x0010);
564
565 /* Disable Reset R_AL/RC_CAL Engine */
566 bcm_phy_write_exp_sel(phydev, 0x00b0, 0x0000);
567}
568EXPORT_SYMBOL_GPL(bcm_phy_r_rc_cal_reset);
569
570int bcm_phy_28nm_a0b0_afe_config_init(struct phy_device *phydev)
571{
572 /* Increase VCO range to prevent unlocking problem of PLL at low
573 * temp
574 */
575 bcm_phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048);
576
577 /* Change Ki to 011 */
578 bcm_phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b);
579
580 /* Disable loading of TVCO buffer to bandgap, set bandgap trim
581 * to 111
582 */
583 bcm_phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20);
584
585 /* Adjust bias current trim by -3 */
586 bcm_phy_write_misc(phydev, DSP_TAP10, 0x690b);
587
588 /* Switch to CORE_BASE1E */
589 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0xd);
590
591 bcm_phy_r_rc_cal_reset(phydev);
592
593 /* write AFE_RXCONFIG_0 */
594 bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19);
595
596 /* write AFE_RXCONFIG_1 */
597 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f);
598
599 /* write AFE_RX_LP_COUNTER */
600 bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
601
602 /* write AFE_HPF_TRIM_OTHERS */
603 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b);
604
605 /* write AFTE_TX_CONFIG */
606 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800);
607
608 return 0;
609}
610EXPORT_SYMBOL_GPL(bcm_phy_28nm_a0b0_afe_config_init);
611
612int bcm_phy_enable_jumbo(struct phy_device *phydev)
613{
614 int ret;
615
616 ret = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL);
617 if (ret < 0)
618 return ret;
619
620 /* Enable extended length packet reception */
621 ret = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL,
622 ret | MII_BCM54XX_AUXCTL_ACTL_EXT_PKT_LEN);
623 if (ret < 0)
624 return ret;
625
626 /* Enable the elastic FIFO for raising the transmission limit from
627 * 4.5KB to 10KB, at the expense of an additional 16 ns in propagation
628 * latency.
629 */
630 return phy_set_bits(phydev, MII_BCM54XX_ECR, MII_BCM54XX_ECR_FIFOE);
631}
632EXPORT_SYMBOL_GPL(bcm_phy_enable_jumbo);
633
634static int __bcm_phy_enable_rdb_access(struct phy_device *phydev)
635{
636 return __bcm_phy_write_exp(phydev, BCM54XX_EXP_REG7E, 0);
637}
638
639static int __bcm_phy_enable_legacy_access(struct phy_device *phydev)
640{
641 return __bcm_phy_write_rdb(phydev, BCM54XX_RDB_REG0087,
642 BCM54XX_ACCESS_MODE_LEGACY_EN);
643}
644
645static int _bcm_phy_cable_test_start(struct phy_device *phydev, bool is_rdb)
646{
647 u16 mask, set;
648 int ret;
649
650 /* Auto-negotiation must be enabled for cable diagnostics to work, but
651 * don't advertise any capabilities.
652 */
653 phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
654 phy_write(phydev, MII_ADVERTISE, ADVERTISE_CSMA);
655 phy_write(phydev, MII_CTRL1000, 0);
656
657 phy_lock_mdio_bus(phydev);
658 if (is_rdb) {
659 ret = __bcm_phy_enable_legacy_access(phydev);
660 if (ret)
661 goto out;
662 }
663
664 mask = BCM54XX_ECD_CTRL_CROSS_SHORT_DIS | BCM54XX_ECD_CTRL_UNIT_MASK;
665 set = BCM54XX_ECD_CTRL_RUN | BCM54XX_ECD_CTRL_BREAK_LINK |
666 FIELD_PREP(BCM54XX_ECD_CTRL_UNIT_MASK,
667 BCM54XX_ECD_CTRL_UNIT_CM);
668
669 ret = __bcm_phy_modify_exp(phydev, BCM54XX_EXP_ECD_CTRL, mask, set);
670
671out:
672 /* re-enable the RDB access even if there was an error */
673 if (is_rdb)
674 ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
675
676 phy_unlock_mdio_bus(phydev);
677
678 return ret;
679}
680
681static int bcm_phy_cable_test_report_trans(int result)
682{
683 switch (result) {
684 case BCM54XX_ECD_FAULT_TYPE_OK:
685 return ETHTOOL_A_CABLE_RESULT_CODE_OK;
686 case BCM54XX_ECD_FAULT_TYPE_OPEN:
687 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
688 case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
689 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
690 case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
691 return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
692 case BCM54XX_ECD_FAULT_TYPE_INVALID:
693 case BCM54XX_ECD_FAULT_TYPE_BUSY:
694 default:
695 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
696 }
697}
698
699static bool bcm_phy_distance_valid(int result)
700{
701 switch (result) {
702 case BCM54XX_ECD_FAULT_TYPE_OPEN:
703 case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
704 case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
705 return true;
706 }
707 return false;
708}
709
710static int bcm_phy_report_length(struct phy_device *phydev, int pair)
711{
712 int val;
713
714 val = __bcm_phy_read_exp(phydev,
715 BCM54XX_EXP_ECD_PAIR_A_LENGTH_RESULTS + pair);
716 if (val < 0)
717 return val;
718
719 if (val == BCM54XX_ECD_LENGTH_RESULTS_INVALID)
720 return 0;
721
722 ethnl_cable_test_fault_length(phydev, pair, val);
723
724 return 0;
725}
726
727static int _bcm_phy_cable_test_get_status(struct phy_device *phydev,
728 bool *finished, bool is_rdb)
729{
730 int pair_a, pair_b, pair_c, pair_d, ret;
731
732 *finished = false;
733
734 phy_lock_mdio_bus(phydev);
735
736 if (is_rdb) {
737 ret = __bcm_phy_enable_legacy_access(phydev);
738 if (ret)
739 goto out;
740 }
741
742 ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_CTRL);
743 if (ret < 0)
744 goto out;
745
746 if (ret & BCM54XX_ECD_CTRL_IN_PROGRESS) {
747 ret = 0;
748 goto out;
749 }
750
751 ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_FAULT_TYPE);
752 if (ret < 0)
753 goto out;
754
755 pair_a = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_A_MASK, ret);
756 pair_b = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_B_MASK, ret);
757 pair_c = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_C_MASK, ret);
758 pair_d = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_D_MASK, ret);
759
760 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
761 bcm_phy_cable_test_report_trans(pair_a));
762 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_B,
763 bcm_phy_cable_test_report_trans(pair_b));
764 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_C,
765 bcm_phy_cable_test_report_trans(pair_c));
766 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_D,
767 bcm_phy_cable_test_report_trans(pair_d));
768
769 if (bcm_phy_distance_valid(pair_a))
770 bcm_phy_report_length(phydev, 0);
771 if (bcm_phy_distance_valid(pair_b))
772 bcm_phy_report_length(phydev, 1);
773 if (bcm_phy_distance_valid(pair_c))
774 bcm_phy_report_length(phydev, 2);
775 if (bcm_phy_distance_valid(pair_d))
776 bcm_phy_report_length(phydev, 3);
777
778 ret = 0;
779 *finished = true;
780out:
781 /* re-enable the RDB access even if there was an error */
782 if (is_rdb)
783 ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
784
785 phy_unlock_mdio_bus(phydev);
786
787 return ret;
788}
789
790int bcm_phy_cable_test_start(struct phy_device *phydev)
791{
792 return _bcm_phy_cable_test_start(phydev, false);
793}
794EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start);
795
796int bcm_phy_cable_test_get_status(struct phy_device *phydev, bool *finished)
797{
798 return _bcm_phy_cable_test_get_status(phydev, finished, false);
799}
800EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status);
801
802/* We assume that all PHYs which support RDB access can be switched to legacy
803 * mode. If, in the future, this is not true anymore, we have to re-implement
804 * this with RDB access.
805 */
806int bcm_phy_cable_test_start_rdb(struct phy_device *phydev)
807{
808 return _bcm_phy_cable_test_start(phydev, true);
809}
810EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start_rdb);
811
812int bcm_phy_cable_test_get_status_rdb(struct phy_device *phydev,
813 bool *finished)
814{
815 return _bcm_phy_cable_test_get_status(phydev, finished, true);
816}
817EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status_rdb);
818
819MODULE_DESCRIPTION("Broadcom PHY Library");
820MODULE_LICENSE("GPL v2");
821MODULE_AUTHOR("Broadcom Corporation");