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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Driver for Vitesse PHYs
4 *
5 * Author: Kriston Carson
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/mii.h>
11#include <linux/ethtool.h>
12#include <linux/phy.h>
13
14/* Vitesse Extended Page Magic Register(s) */
15#define MII_VSC82X4_EXT_PAGE_16E 0x10
16#define MII_VSC82X4_EXT_PAGE_17E 0x11
17#define MII_VSC82X4_EXT_PAGE_18E 0x12
18
19/* Vitesse Extended Control Register 1 */
20#define MII_VSC8244_EXT_CON1 0x17
21#define MII_VSC8244_EXTCON1_INIT 0x0000
22#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
23#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
24#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
25#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
26
27/* Vitesse Interrupt Mask Register */
28#define MII_VSC8244_IMASK 0x19
29#define MII_VSC8244_IMASK_IEN 0x8000
30#define MII_VSC8244_IMASK_SPEED 0x4000
31#define MII_VSC8244_IMASK_LINK 0x2000
32#define MII_VSC8244_IMASK_DUPLEX 0x1000
33#define MII_VSC8244_IMASK_MASK 0xf000
34
35#define MII_VSC8221_IMASK_MASK 0xa000
36
37/* Vitesse Interrupt Status Register */
38#define MII_VSC8244_ISTAT 0x1a
39#define MII_VSC8244_ISTAT_STATUS 0x8000
40#define MII_VSC8244_ISTAT_SPEED 0x4000
41#define MII_VSC8244_ISTAT_LINK 0x2000
42#define MII_VSC8244_ISTAT_DUPLEX 0x1000
43#define MII_VSC8244_ISTAT_MASK (MII_VSC8244_ISTAT_SPEED | \
44 MII_VSC8244_ISTAT_LINK | \
45 MII_VSC8244_ISTAT_DUPLEX)
46
47#define MII_VSC8221_ISTAT_MASK MII_VSC8244_ISTAT_LINK
48
49/* Vitesse Auxiliary Control/Status Register */
50#define MII_VSC8244_AUX_CONSTAT 0x1c
51#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
52#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
53#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
54#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
55#define MII_VSC8244_AUXCONSTAT_100 0x0008
56
57#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
58#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
59
60/* Vitesse Extended Page Access Register */
61#define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f
62
63/* Vitesse VSC8601 Extended PHY Control Register 1 */
64#define MII_VSC8601_EPHY_CTL 0x17
65#define MII_VSC8601_EPHY_CTL_RGMII_SKEW (1 << 8)
66
67#define PHY_ID_VSC8234 0x000fc620
68#define PHY_ID_VSC8244 0x000fc6c0
69#define PHY_ID_VSC8572 0x000704d0
70#define PHY_ID_VSC8601 0x00070420
71#define PHY_ID_VSC7385 0x00070450
72#define PHY_ID_VSC7388 0x00070480
73#define PHY_ID_VSC7395 0x00070550
74#define PHY_ID_VSC7398 0x00070580
75#define PHY_ID_VSC8662 0x00070660
76#define PHY_ID_VSC8221 0x000fc550
77#define PHY_ID_VSC8211 0x000fc4b0
78
79MODULE_DESCRIPTION("Vitesse PHY driver");
80MODULE_AUTHOR("Kriston Carson");
81MODULE_LICENSE("GPL");
82
83static int vsc824x_add_skew(struct phy_device *phydev)
84{
85 int err;
86 int extcon;
87
88 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
89
90 if (extcon < 0)
91 return extcon;
92
93 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
94 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
95
96 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
97 MII_VSC8244_EXTCON1_RX_SKEW);
98
99 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
100
101 return err;
102}
103
104static int vsc824x_config_init(struct phy_device *phydev)
105{
106 int err;
107
108 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
109 MII_VSC8244_AUXCONSTAT_INIT);
110 if (err < 0)
111 return err;
112
113 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
114 err = vsc824x_add_skew(phydev);
115
116 return err;
117}
118
119#define VSC73XX_EXT_PAGE_ACCESS 0x1f
120
121static int vsc73xx_read_page(struct phy_device *phydev)
122{
123 return __phy_read(phydev, VSC73XX_EXT_PAGE_ACCESS);
124}
125
126static int vsc73xx_write_page(struct phy_device *phydev, int page)
127{
128 return __phy_write(phydev, VSC73XX_EXT_PAGE_ACCESS, page);
129}
130
131static void vsc73xx_config_init(struct phy_device *phydev)
132{
133 /* Receiver init */
134 phy_write(phydev, 0x1f, 0x2a30);
135 phy_modify(phydev, 0x0c, 0x0300, 0x0200);
136 phy_write(phydev, 0x1f, 0x0000);
137
138 /* Config LEDs 0x61 */
139 phy_modify(phydev, MII_TPISTATUS, 0xff00, 0x0061);
140}
141
142static int vsc738x_config_init(struct phy_device *phydev)
143{
144 u16 rev;
145 /* This magic sequence appear in the application note
146 * "VSC7385/7388 PHY Configuration".
147 *
148 * Maybe one day we will get to know what it all means.
149 */
150 phy_write(phydev, 0x1f, 0x2a30);
151 phy_modify(phydev, 0x08, 0x0200, 0x0200);
152 phy_write(phydev, 0x1f, 0x52b5);
153 phy_write(phydev, 0x10, 0xb68a);
154 phy_modify(phydev, 0x12, 0xff07, 0x0003);
155 phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
156 phy_write(phydev, 0x10, 0x968a);
157 phy_write(phydev, 0x1f, 0x2a30);
158 phy_modify(phydev, 0x08, 0x0200, 0x0000);
159 phy_write(phydev, 0x1f, 0x0000);
160
161 /* Read revision */
162 rev = phy_read(phydev, MII_PHYSID2);
163 rev &= 0x0f;
164
165 /* Special quirk for revision 0 */
166 if (rev == 0) {
167 phy_write(phydev, 0x1f, 0x2a30);
168 phy_modify(phydev, 0x08, 0x0200, 0x0200);
169 phy_write(phydev, 0x1f, 0x52b5);
170 phy_write(phydev, 0x12, 0x0000);
171 phy_write(phydev, 0x11, 0x0689);
172 phy_write(phydev, 0x10, 0x8f92);
173 phy_write(phydev, 0x1f, 0x52b5);
174 phy_write(phydev, 0x12, 0x0000);
175 phy_write(phydev, 0x11, 0x0e35);
176 phy_write(phydev, 0x10, 0x9786);
177 phy_write(phydev, 0x1f, 0x2a30);
178 phy_modify(phydev, 0x08, 0x0200, 0x0000);
179 phy_write(phydev, 0x17, 0xff80);
180 phy_write(phydev, 0x17, 0x0000);
181 }
182
183 phy_write(phydev, 0x1f, 0x0000);
184 phy_write(phydev, 0x12, 0x0048);
185
186 if (rev == 0) {
187 phy_write(phydev, 0x1f, 0x2a30);
188 phy_write(phydev, 0x14, 0x6600);
189 phy_write(phydev, 0x1f, 0x0000);
190 phy_write(phydev, 0x18, 0xa24e);
191 } else {
192 phy_write(phydev, 0x1f, 0x2a30);
193 phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
194 phy_modify(phydev, 0x14, 0x6000, 0x4000);
195 /* bits 14-15 in extended register 0x14 controls DACG amplitude
196 * 6 = -8%, 2 is hardware default
197 */
198 phy_write(phydev, 0x1f, 0x0001);
199 phy_modify(phydev, 0x14, 0xe000, 0x6000);
200 phy_write(phydev, 0x1f, 0x0000);
201 }
202
203 vsc73xx_config_init(phydev);
204
205 return 0;
206}
207
208static int vsc739x_config_init(struct phy_device *phydev)
209{
210 /* This magic sequence appears in the VSC7395 SparX-G5e application
211 * note "VSC7395/VSC7398 PHY Configuration"
212 *
213 * Maybe one day we will get to know what it all means.
214 */
215 phy_write(phydev, 0x1f, 0x2a30);
216 phy_modify(phydev, 0x08, 0x0200, 0x0200);
217 phy_write(phydev, 0x1f, 0x52b5);
218 phy_write(phydev, 0x10, 0xb68a);
219 phy_modify(phydev, 0x12, 0xff07, 0x0003);
220 phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
221 phy_write(phydev, 0x10, 0x968a);
222 phy_write(phydev, 0x1f, 0x2a30);
223 phy_modify(phydev, 0x08, 0x0200, 0x0000);
224 phy_write(phydev, 0x1f, 0x0000);
225
226 phy_write(phydev, 0x1f, 0x0000);
227 phy_write(phydev, 0x12, 0x0048);
228 phy_write(phydev, 0x1f, 0x2a30);
229 phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
230 phy_modify(phydev, 0x14, 0x6000, 0x4000);
231 phy_write(phydev, 0x1f, 0x0001);
232 phy_modify(phydev, 0x14, 0xe000, 0x6000);
233 phy_write(phydev, 0x1f, 0x0000);
234
235 vsc73xx_config_init(phydev);
236
237 return 0;
238}
239
240static int vsc73xx_config_aneg(struct phy_device *phydev)
241{
242 /* The VSC73xx switches does not like to be instructed to
243 * do autonegotiation in any way, it prefers that you just go
244 * with the power-on/reset defaults. Writing some registers will
245 * just make autonegotiation permanently fail.
246 */
247 return 0;
248}
249
250/* This adds a skew for both TX and RX clocks, so the skew should only be
251 * applied to "rgmii-id" interfaces. It may not work as expected
252 * on "rgmii-txid", "rgmii-rxid" or "rgmii" interfaces.
253 */
254static int vsc8601_add_skew(struct phy_device *phydev)
255{
256 int ret;
257
258 ret = phy_read(phydev, MII_VSC8601_EPHY_CTL);
259 if (ret < 0)
260 return ret;
261
262 ret |= MII_VSC8601_EPHY_CTL_RGMII_SKEW;
263 return phy_write(phydev, MII_VSC8601_EPHY_CTL, ret);
264}
265
266static int vsc8601_config_init(struct phy_device *phydev)
267{
268 int ret = 0;
269
270 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
271 ret = vsc8601_add_skew(phydev);
272
273 if (ret < 0)
274 return ret;
275
276 return 0;
277}
278
279static int vsc82xx_config_intr(struct phy_device *phydev)
280{
281 int err;
282
283 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
284 /* Don't bother to ACK the interrupts since the 824x cannot
285 * clear the interrupts if they are disabled.
286 */
287 err = phy_write(phydev, MII_VSC8244_IMASK,
288 (phydev->drv->phy_id == PHY_ID_VSC8234 ||
289 phydev->drv->phy_id == PHY_ID_VSC8244 ||
290 phydev->drv->phy_id == PHY_ID_VSC8572 ||
291 phydev->drv->phy_id == PHY_ID_VSC8601) ?
292 MII_VSC8244_IMASK_MASK :
293 MII_VSC8221_IMASK_MASK);
294 else {
295 /* The Vitesse PHY cannot clear the interrupt
296 * once it has disabled them, so we clear them first
297 */
298 err = phy_read(phydev, MII_VSC8244_ISTAT);
299
300 if (err < 0)
301 return err;
302
303 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
304 }
305
306 return err;
307}
308
309static irqreturn_t vsc82xx_handle_interrupt(struct phy_device *phydev)
310{
311 int irq_status, irq_mask;
312
313 if (phydev->drv->phy_id == PHY_ID_VSC8244 ||
314 phydev->drv->phy_id == PHY_ID_VSC8572 ||
315 phydev->drv->phy_id == PHY_ID_VSC8601)
316 irq_mask = MII_VSC8244_ISTAT_MASK;
317 else
318 irq_mask = MII_VSC8221_ISTAT_MASK;
319
320 irq_status = phy_read(phydev, MII_VSC8244_ISTAT);
321 if (irq_status < 0) {
322 phy_error(phydev);
323 return IRQ_NONE;
324 }
325
326 if (!(irq_status & irq_mask))
327 return IRQ_NONE;
328
329 phy_trigger_machine(phydev);
330
331 return IRQ_HANDLED;
332}
333
334static int vsc8221_config_init(struct phy_device *phydev)
335{
336 int err;
337
338 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
339 MII_VSC8221_AUXCONSTAT_INIT);
340 return err;
341
342 /* Perhaps we should set EXT_CON1 based on the interface?
343 * Options are 802.3Z SerDes or SGMII
344 */
345}
346
347/* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links
348 * @phydev: target phy_device struct
349 *
350 * Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing
351 * special values in the VSC8234/VSC8244 extended reserved registers
352 */
353static int vsc82x4_config_autocross_enable(struct phy_device *phydev)
354{
355 int ret;
356
357 if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100)
358 return 0;
359
360 /* map extended registers set 0x10 - 0x1e */
361 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5);
362 if (ret >= 0)
363 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012);
364 if (ret >= 0)
365 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803);
366 if (ret >= 0)
367 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa);
368 /* map standard registers set 0x10 - 0x1e */
369 if (ret >= 0)
370 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
371 else
372 phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
373
374 return ret;
375}
376
377/* vsc82x4_config_aneg - restart auto-negotiation or write BMCR
378 * @phydev: target phy_device struct
379 *
380 * Description: If auto-negotiation is enabled, we configure the
381 * advertising, and then restart auto-negotiation. If it is not
382 * enabled, then we write the BMCR and also start the auto
383 * MDI/MDI-X feature
384 */
385static int vsc82x4_config_aneg(struct phy_device *phydev)
386{
387 int ret;
388
389 /* Enable auto MDI/MDI-X when in 10/100 forced link speeds by
390 * writing special values in the VSC8234 extended reserved registers
391 */
392 if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) {
393 ret = genphy_setup_forced(phydev);
394
395 if (ret < 0) /* error */
396 return ret;
397
398 return vsc82x4_config_autocross_enable(phydev);
399 }
400
401 return genphy_config_aneg(phydev);
402}
403
404/* Vitesse 82xx */
405static struct phy_driver vsc82xx_driver[] = {
406{
407 .phy_id = PHY_ID_VSC8234,
408 .name = "Vitesse VSC8234",
409 .phy_id_mask = 0x000ffff0,
410 /* PHY_GBIT_FEATURES */
411 .config_init = &vsc824x_config_init,
412 .config_aneg = &vsc82x4_config_aneg,
413 .config_intr = &vsc82xx_config_intr,
414 .handle_interrupt = &vsc82xx_handle_interrupt,
415}, {
416 .phy_id = PHY_ID_VSC8244,
417 .name = "Vitesse VSC8244",
418 .phy_id_mask = 0x000fffc0,
419 /* PHY_GBIT_FEATURES */
420 .config_init = &vsc824x_config_init,
421 .config_aneg = &vsc82x4_config_aneg,
422 .config_intr = &vsc82xx_config_intr,
423 .handle_interrupt = &vsc82xx_handle_interrupt,
424}, {
425 .phy_id = PHY_ID_VSC8572,
426 .name = "Vitesse VSC8572",
427 .phy_id_mask = 0x000ffff0,
428 /* PHY_GBIT_FEATURES */
429 .config_init = &vsc824x_config_init,
430 .config_aneg = &vsc82x4_config_aneg,
431 .config_intr = &vsc82xx_config_intr,
432 .handle_interrupt = &vsc82xx_handle_interrupt,
433}, {
434 .phy_id = PHY_ID_VSC8601,
435 .name = "Vitesse VSC8601",
436 .phy_id_mask = 0x000ffff0,
437 /* PHY_GBIT_FEATURES */
438 .config_init = &vsc8601_config_init,
439 .config_intr = &vsc82xx_config_intr,
440 .handle_interrupt = &vsc82xx_handle_interrupt,
441}, {
442 .phy_id = PHY_ID_VSC7385,
443 .name = "Vitesse VSC7385",
444 .phy_id_mask = 0x000ffff0,
445 /* PHY_GBIT_FEATURES */
446 .config_init = vsc738x_config_init,
447 .config_aneg = vsc73xx_config_aneg,
448 .read_page = vsc73xx_read_page,
449 .write_page = vsc73xx_write_page,
450}, {
451 .phy_id = PHY_ID_VSC7388,
452 .name = "Vitesse VSC7388",
453 .phy_id_mask = 0x000ffff0,
454 /* PHY_GBIT_FEATURES */
455 .config_init = vsc738x_config_init,
456 .config_aneg = vsc73xx_config_aneg,
457 .read_page = vsc73xx_read_page,
458 .write_page = vsc73xx_write_page,
459}, {
460 .phy_id = PHY_ID_VSC7395,
461 .name = "Vitesse VSC7395",
462 .phy_id_mask = 0x000ffff0,
463 /* PHY_GBIT_FEATURES */
464 .config_init = vsc739x_config_init,
465 .config_aneg = vsc73xx_config_aneg,
466 .read_page = vsc73xx_read_page,
467 .write_page = vsc73xx_write_page,
468}, {
469 .phy_id = PHY_ID_VSC7398,
470 .name = "Vitesse VSC7398",
471 .phy_id_mask = 0x000ffff0,
472 /* PHY_GBIT_FEATURES */
473 .config_init = vsc739x_config_init,
474 .config_aneg = vsc73xx_config_aneg,
475 .read_page = vsc73xx_read_page,
476 .write_page = vsc73xx_write_page,
477}, {
478 .phy_id = PHY_ID_VSC8662,
479 .name = "Vitesse VSC8662",
480 .phy_id_mask = 0x000ffff0,
481 /* PHY_GBIT_FEATURES */
482 .config_init = &vsc824x_config_init,
483 .config_aneg = &vsc82x4_config_aneg,
484 .config_intr = &vsc82xx_config_intr,
485 .handle_interrupt = &vsc82xx_handle_interrupt,
486}, {
487 /* Vitesse 8221 */
488 .phy_id = PHY_ID_VSC8221,
489 .phy_id_mask = 0x000ffff0,
490 .name = "Vitesse VSC8221",
491 /* PHY_GBIT_FEATURES */
492 .config_init = &vsc8221_config_init,
493 .config_intr = &vsc82xx_config_intr,
494 .handle_interrupt = &vsc82xx_handle_interrupt,
495}, {
496 /* Vitesse 8211 */
497 .phy_id = PHY_ID_VSC8211,
498 .phy_id_mask = 0x000ffff0,
499 .name = "Vitesse VSC8211",
500 /* PHY_GBIT_FEATURES */
501 .config_init = &vsc8221_config_init,
502 .config_intr = &vsc82xx_config_intr,
503 .handle_interrupt = &vsc82xx_handle_interrupt,
504} };
505
506module_phy_driver(vsc82xx_driver);
507
508static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
509 { PHY_ID_VSC8234, 0x000ffff0 },
510 { PHY_ID_VSC8244, 0x000fffc0 },
511 { PHY_ID_VSC8572, 0x000ffff0 },
512 { PHY_ID_VSC7385, 0x000ffff0 },
513 { PHY_ID_VSC7388, 0x000ffff0 },
514 { PHY_ID_VSC7395, 0x000ffff0 },
515 { PHY_ID_VSC7398, 0x000ffff0 },
516 { PHY_ID_VSC8662, 0x000ffff0 },
517 { PHY_ID_VSC8221, 0x000ffff0 },
518 { PHY_ID_VSC8211, 0x000ffff0 },
519 { }
520};
521
522MODULE_DEVICE_TABLE(mdio, vitesse_tbl);
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Driver for Vitesse PHYs
4 *
5 * Author: Kriston Carson
6 */
7
8#include <linux/kernel.h>
9#include <linux/module.h>
10#include <linux/mii.h>
11#include <linux/ethtool.h>
12#include <linux/phy.h>
13
14/* Vitesse Extended Page Magic Register(s) */
15#define MII_VSC82X4_EXT_PAGE_16E 0x10
16#define MII_VSC82X4_EXT_PAGE_17E 0x11
17#define MII_VSC82X4_EXT_PAGE_18E 0x12
18
19/* Vitesse Extended Control Register 1 */
20#define MII_VSC8244_EXT_CON1 0x17
21#define MII_VSC8244_EXTCON1_INIT 0x0000
22#define MII_VSC8244_EXTCON1_TX_SKEW_MASK 0x0c00
23#define MII_VSC8244_EXTCON1_RX_SKEW_MASK 0x0300
24#define MII_VSC8244_EXTCON1_TX_SKEW 0x0800
25#define MII_VSC8244_EXTCON1_RX_SKEW 0x0200
26
27/* Vitesse Interrupt Mask Register */
28#define MII_VSC8244_IMASK 0x19
29#define MII_VSC8244_IMASK_IEN 0x8000
30#define MII_VSC8244_IMASK_SPEED 0x4000
31#define MII_VSC8244_IMASK_LINK 0x2000
32#define MII_VSC8244_IMASK_DUPLEX 0x1000
33#define MII_VSC8244_IMASK_MASK 0xf000
34
35#define MII_VSC8221_IMASK_MASK 0xa000
36
37/* Vitesse Interrupt Status Register */
38#define MII_VSC8244_ISTAT 0x1a
39#define MII_VSC8244_ISTAT_STATUS 0x8000
40#define MII_VSC8244_ISTAT_SPEED 0x4000
41#define MII_VSC8244_ISTAT_LINK 0x2000
42#define MII_VSC8244_ISTAT_DUPLEX 0x1000
43
44/* Vitesse Auxiliary Control/Status Register */
45#define MII_VSC8244_AUX_CONSTAT 0x1c
46#define MII_VSC8244_AUXCONSTAT_INIT 0x0000
47#define MII_VSC8244_AUXCONSTAT_DUPLEX 0x0020
48#define MII_VSC8244_AUXCONSTAT_SPEED 0x0018
49#define MII_VSC8244_AUXCONSTAT_GBIT 0x0010
50#define MII_VSC8244_AUXCONSTAT_100 0x0008
51
52#define MII_VSC8221_AUXCONSTAT_INIT 0x0004 /* need to set this bit? */
53#define MII_VSC8221_AUXCONSTAT_RESERVED 0x0004
54
55/* Vitesse Extended Page Access Register */
56#define MII_VSC82X4_EXT_PAGE_ACCESS 0x1f
57
58/* Vitesse VSC8601 Extended PHY Control Register 1 */
59#define MII_VSC8601_EPHY_CTL 0x17
60#define MII_VSC8601_EPHY_CTL_RGMII_SKEW (1 << 8)
61
62#define PHY_ID_VSC8234 0x000fc620
63#define PHY_ID_VSC8244 0x000fc6c0
64#define PHY_ID_VSC8572 0x000704d0
65#define PHY_ID_VSC8601 0x00070420
66#define PHY_ID_VSC7385 0x00070450
67#define PHY_ID_VSC7388 0x00070480
68#define PHY_ID_VSC7395 0x00070550
69#define PHY_ID_VSC7398 0x00070580
70#define PHY_ID_VSC8662 0x00070660
71#define PHY_ID_VSC8221 0x000fc550
72#define PHY_ID_VSC8211 0x000fc4b0
73
74MODULE_DESCRIPTION("Vitesse PHY driver");
75MODULE_AUTHOR("Kriston Carson");
76MODULE_LICENSE("GPL");
77
78static int vsc824x_add_skew(struct phy_device *phydev)
79{
80 int err;
81 int extcon;
82
83 extcon = phy_read(phydev, MII_VSC8244_EXT_CON1);
84
85 if (extcon < 0)
86 return extcon;
87
88 extcon &= ~(MII_VSC8244_EXTCON1_TX_SKEW_MASK |
89 MII_VSC8244_EXTCON1_RX_SKEW_MASK);
90
91 extcon |= (MII_VSC8244_EXTCON1_TX_SKEW |
92 MII_VSC8244_EXTCON1_RX_SKEW);
93
94 err = phy_write(phydev, MII_VSC8244_EXT_CON1, extcon);
95
96 return err;
97}
98
99static int vsc824x_config_init(struct phy_device *phydev)
100{
101 int err;
102
103 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
104 MII_VSC8244_AUXCONSTAT_INIT);
105 if (err < 0)
106 return err;
107
108 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
109 err = vsc824x_add_skew(phydev);
110
111 return err;
112}
113
114#define VSC73XX_EXT_PAGE_ACCESS 0x1f
115
116static int vsc73xx_read_page(struct phy_device *phydev)
117{
118 return __phy_read(phydev, VSC73XX_EXT_PAGE_ACCESS);
119}
120
121static int vsc73xx_write_page(struct phy_device *phydev, int page)
122{
123 return __phy_write(phydev, VSC73XX_EXT_PAGE_ACCESS, page);
124}
125
126static void vsc73xx_config_init(struct phy_device *phydev)
127{
128 /* Receiver init */
129 phy_write(phydev, 0x1f, 0x2a30);
130 phy_modify(phydev, 0x0c, 0x0300, 0x0200);
131 phy_write(phydev, 0x1f, 0x0000);
132
133 /* Config LEDs 0x61 */
134 phy_modify(phydev, MII_TPISTATUS, 0xff00, 0x0061);
135}
136
137static int vsc738x_config_init(struct phy_device *phydev)
138{
139 u16 rev;
140 /* This magic sequence appear in the application note
141 * "VSC7385/7388 PHY Configuration".
142 *
143 * Maybe one day we will get to know what it all means.
144 */
145 phy_write(phydev, 0x1f, 0x2a30);
146 phy_modify(phydev, 0x08, 0x0200, 0x0200);
147 phy_write(phydev, 0x1f, 0x52b5);
148 phy_write(phydev, 0x10, 0xb68a);
149 phy_modify(phydev, 0x12, 0xff07, 0x0003);
150 phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
151 phy_write(phydev, 0x10, 0x968a);
152 phy_write(phydev, 0x1f, 0x2a30);
153 phy_modify(phydev, 0x08, 0x0200, 0x0000);
154 phy_write(phydev, 0x1f, 0x0000);
155
156 /* Read revision */
157 rev = phy_read(phydev, MII_PHYSID2);
158 rev &= 0x0f;
159
160 /* Special quirk for revision 0 */
161 if (rev == 0) {
162 phy_write(phydev, 0x1f, 0x2a30);
163 phy_modify(phydev, 0x08, 0x0200, 0x0200);
164 phy_write(phydev, 0x1f, 0x52b5);
165 phy_write(phydev, 0x12, 0x0000);
166 phy_write(phydev, 0x11, 0x0689);
167 phy_write(phydev, 0x10, 0x8f92);
168 phy_write(phydev, 0x1f, 0x52b5);
169 phy_write(phydev, 0x12, 0x0000);
170 phy_write(phydev, 0x11, 0x0e35);
171 phy_write(phydev, 0x10, 0x9786);
172 phy_write(phydev, 0x1f, 0x2a30);
173 phy_modify(phydev, 0x08, 0x0200, 0x0000);
174 phy_write(phydev, 0x17, 0xff80);
175 phy_write(phydev, 0x17, 0x0000);
176 }
177
178 phy_write(phydev, 0x1f, 0x0000);
179 phy_write(phydev, 0x12, 0x0048);
180
181 if (rev == 0) {
182 phy_write(phydev, 0x1f, 0x2a30);
183 phy_write(phydev, 0x14, 0x6600);
184 phy_write(phydev, 0x1f, 0x0000);
185 phy_write(phydev, 0x18, 0xa24e);
186 } else {
187 phy_write(phydev, 0x1f, 0x2a30);
188 phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
189 phy_modify(phydev, 0x14, 0x6000, 0x4000);
190 /* bits 14-15 in extended register 0x14 controls DACG amplitude
191 * 6 = -8%, 2 is hardware default
192 */
193 phy_write(phydev, 0x1f, 0x0001);
194 phy_modify(phydev, 0x14, 0xe000, 0x6000);
195 phy_write(phydev, 0x1f, 0x0000);
196 }
197
198 vsc73xx_config_init(phydev);
199
200 return 0;
201}
202
203static int vsc739x_config_init(struct phy_device *phydev)
204{
205 /* This magic sequence appears in the VSC7395 SparX-G5e application
206 * note "VSC7395/VSC7398 PHY Configuration"
207 *
208 * Maybe one day we will get to know what it all means.
209 */
210 phy_write(phydev, 0x1f, 0x2a30);
211 phy_modify(phydev, 0x08, 0x0200, 0x0200);
212 phy_write(phydev, 0x1f, 0x52b5);
213 phy_write(phydev, 0x10, 0xb68a);
214 phy_modify(phydev, 0x12, 0xff07, 0x0003);
215 phy_modify(phydev, 0x11, 0x00ff, 0x00a2);
216 phy_write(phydev, 0x10, 0x968a);
217 phy_write(phydev, 0x1f, 0x2a30);
218 phy_modify(phydev, 0x08, 0x0200, 0x0000);
219 phy_write(phydev, 0x1f, 0x0000);
220
221 phy_write(phydev, 0x1f, 0x0000);
222 phy_write(phydev, 0x12, 0x0048);
223 phy_write(phydev, 0x1f, 0x2a30);
224 phy_modify(phydev, 0x16, 0x0fc0, 0x0240);
225 phy_modify(phydev, 0x14, 0x6000, 0x4000);
226 phy_write(phydev, 0x1f, 0x0001);
227 phy_modify(phydev, 0x14, 0xe000, 0x6000);
228 phy_write(phydev, 0x1f, 0x0000);
229
230 vsc73xx_config_init(phydev);
231
232 return 0;
233}
234
235static int vsc73xx_config_aneg(struct phy_device *phydev)
236{
237 /* The VSC73xx switches does not like to be instructed to
238 * do autonegotiation in any way, it prefers that you just go
239 * with the power-on/reset defaults. Writing some registers will
240 * just make autonegotiation permanently fail.
241 */
242 return 0;
243}
244
245/* This adds a skew for both TX and RX clocks, so the skew should only be
246 * applied to "rgmii-id" interfaces. It may not work as expected
247 * on "rgmii-txid", "rgmii-rxid" or "rgmii" interfaces. */
248static int vsc8601_add_skew(struct phy_device *phydev)
249{
250 int ret;
251
252 ret = phy_read(phydev, MII_VSC8601_EPHY_CTL);
253 if (ret < 0)
254 return ret;
255
256 ret |= MII_VSC8601_EPHY_CTL_RGMII_SKEW;
257 return phy_write(phydev, MII_VSC8601_EPHY_CTL, ret);
258}
259
260static int vsc8601_config_init(struct phy_device *phydev)
261{
262 int ret = 0;
263
264 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID)
265 ret = vsc8601_add_skew(phydev);
266
267 if (ret < 0)
268 return ret;
269
270 return 0;
271}
272
273static int vsc824x_ack_interrupt(struct phy_device *phydev)
274{
275 int err = 0;
276
277 /* Don't bother to ACK the interrupts if interrupts
278 * are disabled. The 824x cannot clear the interrupts
279 * if they are disabled.
280 */
281 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
282 err = phy_read(phydev, MII_VSC8244_ISTAT);
283
284 return (err < 0) ? err : 0;
285}
286
287static int vsc82xx_config_intr(struct phy_device *phydev)
288{
289 int err;
290
291 if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
292 err = phy_write(phydev, MII_VSC8244_IMASK,
293 (phydev->drv->phy_id == PHY_ID_VSC8234 ||
294 phydev->drv->phy_id == PHY_ID_VSC8244 ||
295 phydev->drv->phy_id == PHY_ID_VSC8572 ||
296 phydev->drv->phy_id == PHY_ID_VSC8601) ?
297 MII_VSC8244_IMASK_MASK :
298 MII_VSC8221_IMASK_MASK);
299 else {
300 /* The Vitesse PHY cannot clear the interrupt
301 * once it has disabled them, so we clear them first
302 */
303 err = phy_read(phydev, MII_VSC8244_ISTAT);
304
305 if (err < 0)
306 return err;
307
308 err = phy_write(phydev, MII_VSC8244_IMASK, 0);
309 }
310
311 return err;
312}
313
314static int vsc8221_config_init(struct phy_device *phydev)
315{
316 int err;
317
318 err = phy_write(phydev, MII_VSC8244_AUX_CONSTAT,
319 MII_VSC8221_AUXCONSTAT_INIT);
320 return err;
321
322 /* Perhaps we should set EXT_CON1 based on the interface?
323 * Options are 802.3Z SerDes or SGMII
324 */
325}
326
327/* vsc82x4_config_autocross_enable - Enable auto MDI/MDI-X for forced links
328 * @phydev: target phy_device struct
329 *
330 * Enable auto MDI/MDI-X when in 10/100 forced link speeds by writing
331 * special values in the VSC8234/VSC8244 extended reserved registers
332 */
333static int vsc82x4_config_autocross_enable(struct phy_device *phydev)
334{
335 int ret;
336
337 if (phydev->autoneg == AUTONEG_ENABLE || phydev->speed > SPEED_100)
338 return 0;
339
340 /* map extended registers set 0x10 - 0x1e */
341 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x52b5);
342 if (ret >= 0)
343 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_18E, 0x0012);
344 if (ret >= 0)
345 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_17E, 0x2803);
346 if (ret >= 0)
347 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_16E, 0x87fa);
348 /* map standard registers set 0x10 - 0x1e */
349 if (ret >= 0)
350 ret = phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
351 else
352 phy_write(phydev, MII_VSC82X4_EXT_PAGE_ACCESS, 0x0000);
353
354 return ret;
355}
356
357/* vsc82x4_config_aneg - restart auto-negotiation or write BMCR
358 * @phydev: target phy_device struct
359 *
360 * Description: If auto-negotiation is enabled, we configure the
361 * advertising, and then restart auto-negotiation. If it is not
362 * enabled, then we write the BMCR and also start the auto
363 * MDI/MDI-X feature
364 */
365static int vsc82x4_config_aneg(struct phy_device *phydev)
366{
367 int ret;
368
369 /* Enable auto MDI/MDI-X when in 10/100 forced link speeds by
370 * writing special values in the VSC8234 extended reserved registers
371 */
372 if (phydev->autoneg != AUTONEG_ENABLE && phydev->speed <= SPEED_100) {
373 ret = genphy_setup_forced(phydev);
374
375 if (ret < 0) /* error */
376 return ret;
377
378 return vsc82x4_config_autocross_enable(phydev);
379 }
380
381 return genphy_config_aneg(phydev);
382}
383
384/* Vitesse 82xx */
385static struct phy_driver vsc82xx_driver[] = {
386{
387 .phy_id = PHY_ID_VSC8234,
388 .name = "Vitesse VSC8234",
389 .phy_id_mask = 0x000ffff0,
390 /* PHY_GBIT_FEATURES */
391 .config_init = &vsc824x_config_init,
392 .config_aneg = &vsc82x4_config_aneg,
393 .ack_interrupt = &vsc824x_ack_interrupt,
394 .config_intr = &vsc82xx_config_intr,
395}, {
396 .phy_id = PHY_ID_VSC8244,
397 .name = "Vitesse VSC8244",
398 .phy_id_mask = 0x000fffc0,
399 /* PHY_GBIT_FEATURES */
400 .config_init = &vsc824x_config_init,
401 .config_aneg = &vsc82x4_config_aneg,
402 .ack_interrupt = &vsc824x_ack_interrupt,
403 .config_intr = &vsc82xx_config_intr,
404}, {
405 .phy_id = PHY_ID_VSC8572,
406 .name = "Vitesse VSC8572",
407 .phy_id_mask = 0x000ffff0,
408 /* PHY_GBIT_FEATURES */
409 .config_init = &vsc824x_config_init,
410 .config_aneg = &vsc82x4_config_aneg,
411 .ack_interrupt = &vsc824x_ack_interrupt,
412 .config_intr = &vsc82xx_config_intr,
413}, {
414 .phy_id = PHY_ID_VSC8601,
415 .name = "Vitesse VSC8601",
416 .phy_id_mask = 0x000ffff0,
417 /* PHY_GBIT_FEATURES */
418 .config_init = &vsc8601_config_init,
419 .ack_interrupt = &vsc824x_ack_interrupt,
420 .config_intr = &vsc82xx_config_intr,
421}, {
422 .phy_id = PHY_ID_VSC7385,
423 .name = "Vitesse VSC7385",
424 .phy_id_mask = 0x000ffff0,
425 /* PHY_GBIT_FEATURES */
426 .config_init = vsc738x_config_init,
427 .config_aneg = vsc73xx_config_aneg,
428 .read_page = vsc73xx_read_page,
429 .write_page = vsc73xx_write_page,
430}, {
431 .phy_id = PHY_ID_VSC7388,
432 .name = "Vitesse VSC7388",
433 .phy_id_mask = 0x000ffff0,
434 /* PHY_GBIT_FEATURES */
435 .config_init = vsc738x_config_init,
436 .config_aneg = vsc73xx_config_aneg,
437 .read_page = vsc73xx_read_page,
438 .write_page = vsc73xx_write_page,
439}, {
440 .phy_id = PHY_ID_VSC7395,
441 .name = "Vitesse VSC7395",
442 .phy_id_mask = 0x000ffff0,
443 /* PHY_GBIT_FEATURES */
444 .config_init = vsc739x_config_init,
445 .config_aneg = vsc73xx_config_aneg,
446 .read_page = vsc73xx_read_page,
447 .write_page = vsc73xx_write_page,
448}, {
449 .phy_id = PHY_ID_VSC7398,
450 .name = "Vitesse VSC7398",
451 .phy_id_mask = 0x000ffff0,
452 /* PHY_GBIT_FEATURES */
453 .config_init = vsc739x_config_init,
454 .config_aneg = vsc73xx_config_aneg,
455 .read_page = vsc73xx_read_page,
456 .write_page = vsc73xx_write_page,
457}, {
458 .phy_id = PHY_ID_VSC8662,
459 .name = "Vitesse VSC8662",
460 .phy_id_mask = 0x000ffff0,
461 /* PHY_GBIT_FEATURES */
462 .config_init = &vsc824x_config_init,
463 .config_aneg = &vsc82x4_config_aneg,
464 .ack_interrupt = &vsc824x_ack_interrupt,
465 .config_intr = &vsc82xx_config_intr,
466}, {
467 /* Vitesse 8221 */
468 .phy_id = PHY_ID_VSC8221,
469 .phy_id_mask = 0x000ffff0,
470 .name = "Vitesse VSC8221",
471 /* PHY_GBIT_FEATURES */
472 .config_init = &vsc8221_config_init,
473 .ack_interrupt = &vsc824x_ack_interrupt,
474 .config_intr = &vsc82xx_config_intr,
475}, {
476 /* Vitesse 8211 */
477 .phy_id = PHY_ID_VSC8211,
478 .phy_id_mask = 0x000ffff0,
479 .name = "Vitesse VSC8211",
480 /* PHY_GBIT_FEATURES */
481 .config_init = &vsc8221_config_init,
482 .ack_interrupt = &vsc824x_ack_interrupt,
483 .config_intr = &vsc82xx_config_intr,
484} };
485
486module_phy_driver(vsc82xx_driver);
487
488static struct mdio_device_id __maybe_unused vitesse_tbl[] = {
489 { PHY_ID_VSC8234, 0x000ffff0 },
490 { PHY_ID_VSC8244, 0x000fffc0 },
491 { PHY_ID_VSC8572, 0x000ffff0 },
492 { PHY_ID_VSC7385, 0x000ffff0 },
493 { PHY_ID_VSC7388, 0x000ffff0 },
494 { PHY_ID_VSC7395, 0x000ffff0 },
495 { PHY_ID_VSC7398, 0x000ffff0 },
496 { PHY_ID_VSC8662, 0x000ffff0 },
497 { PHY_ID_VSC8221, 0x000ffff0 },
498 { PHY_ID_VSC8211, 0x000ffff0 },
499 { }
500};
501
502MODULE_DEVICE_TABLE(mdio, vitesse_tbl);