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-rw-r--r--drivers/net/ibm_newemac/phy.c541
1 files changed, 541 insertions, 0 deletions
diff --git a/drivers/net/ibm_newemac/phy.c b/drivers/net/ibm_newemac/phy.c
new file mode 100644
index 00000000000..ab4e5969fe6
--- /dev/null
+++ b/drivers/net/ibm_newemac/phy.c
@@ -0,0 +1,541 @@
1/*
2 * drivers/net/ibm_newemac/phy.c
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller, PHY support.
5 * Borrowed from sungem_phy.c, though I only kept the generic MII
6 * driver for now.
7 *
8 * This file should be shared with other drivers or eventually
9 * merged as the "low level" part of miilib
10 *
11 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
12 * <benh@kernel.crashing.org>
13 *
14 * Based on the arch/ppc version of the driver:
15 *
16 * (c) 2003, Benjamin Herrenscmidt (benh@kernel.crashing.org)
17 * (c) 2004-2005, Eugene Surovegin <ebs@ebshome.net>
18 *
19 */
20#include <linux/module.h>
21#include <linux/kernel.h>
22#include <linux/types.h>
23#include <linux/netdevice.h>
24#include <linux/mii.h>
25#include <linux/ethtool.h>
26#include <linux/delay.h>
27
28#include "emac.h"
29#include "phy.h"
30
31#define phy_read _phy_read
32#define phy_write _phy_write
33
34static inline int _phy_read(struct mii_phy *phy, int reg)
35{
36 return phy->mdio_read(phy->dev, phy->address, reg);
37}
38
39static inline void _phy_write(struct mii_phy *phy, int reg, int val)
40{
41 phy->mdio_write(phy->dev, phy->address, reg, val);
42}
43
44static inline int gpcs_phy_read(struct mii_phy *phy, int reg)
45{
46 return phy->mdio_read(phy->dev, phy->gpcs_address, reg);
47}
48
49static inline void gpcs_phy_write(struct mii_phy *phy, int reg, int val)
50{
51 phy->mdio_write(phy->dev, phy->gpcs_address, reg, val);
52}
53
54int emac_mii_reset_phy(struct mii_phy *phy)
55{
56 int val;
57 int limit = 10000;
58
59 val = phy_read(phy, MII_BMCR);
60 val &= ~(BMCR_ISOLATE | BMCR_ANENABLE);
61 val |= BMCR_RESET;
62 phy_write(phy, MII_BMCR, val);
63
64 udelay(300);
65
66 while (--limit) {
67 val = phy_read(phy, MII_BMCR);
68 if (val >= 0 && (val & BMCR_RESET) == 0)
69 break;
70 udelay(10);
71 }
72 if ((val & BMCR_ISOLATE) && limit > 0)
73 phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE);
74
75 return limit <= 0;
76}
77
78int emac_mii_reset_gpcs(struct mii_phy *phy)
79{
80 int val;
81 int limit = 10000;
82
83 val = gpcs_phy_read(phy, MII_BMCR);
84 val &= ~(BMCR_ISOLATE | BMCR_ANENABLE);
85 val |= BMCR_RESET;
86 gpcs_phy_write(phy, MII_BMCR, val);
87
88 udelay(300);
89
90 while (--limit) {
91 val = gpcs_phy_read(phy, MII_BMCR);
92 if (val >= 0 && (val & BMCR_RESET) == 0)
93 break;
94 udelay(10);
95 }
96 if ((val & BMCR_ISOLATE) && limit > 0)
97 gpcs_phy_write(phy, MII_BMCR, val & ~BMCR_ISOLATE);
98
99 if (limit > 0 && phy->mode == PHY_MODE_SGMII) {
100 /* Configure GPCS interface to recommended setting for SGMII */
101 gpcs_phy_write(phy, 0x04, 0x8120); /* AsymPause, FDX */
102 gpcs_phy_write(phy, 0x07, 0x2801); /* msg_pg, toggle */
103 gpcs_phy_write(phy, 0x00, 0x0140); /* 1Gbps, FDX */
104 }
105
106 return limit <= 0;
107}
108
109static int genmii_setup_aneg(struct mii_phy *phy, u32 advertise)
110{
111 int ctl, adv;
112
113 phy->autoneg = AUTONEG_ENABLE;
114 phy->speed = SPEED_10;
115 phy->duplex = DUPLEX_HALF;
116 phy->pause = phy->asym_pause = 0;
117 phy->advertising = advertise;
118
119 ctl = phy_read(phy, MII_BMCR);
120 if (ctl < 0)
121 return ctl;
122 ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
123
124 /* First clear the PHY */
125 phy_write(phy, MII_BMCR, ctl);
126
127 /* Setup standard advertise */
128 adv = phy_read(phy, MII_ADVERTISE);
129 if (adv < 0)
130 return adv;
131 adv &= ~(ADVERTISE_ALL | ADVERTISE_100BASE4 | ADVERTISE_PAUSE_CAP |
132 ADVERTISE_PAUSE_ASYM);
133 if (advertise & ADVERTISED_10baseT_Half)
134 adv |= ADVERTISE_10HALF;
135 if (advertise & ADVERTISED_10baseT_Full)
136 adv |= ADVERTISE_10FULL;
137 if (advertise & ADVERTISED_100baseT_Half)
138 adv |= ADVERTISE_100HALF;
139 if (advertise & ADVERTISED_100baseT_Full)
140 adv |= ADVERTISE_100FULL;
141 if (advertise & ADVERTISED_Pause)
142 adv |= ADVERTISE_PAUSE_CAP;
143 if (advertise & ADVERTISED_Asym_Pause)
144 adv |= ADVERTISE_PAUSE_ASYM;
145 phy_write(phy, MII_ADVERTISE, adv);
146
147 if (phy->features &
148 (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) {
149 adv = phy_read(phy, MII_CTRL1000);
150 if (adv < 0)
151 return adv;
152 adv &= ~(ADVERTISE_1000FULL | ADVERTISE_1000HALF);
153 if (advertise & ADVERTISED_1000baseT_Full)
154 adv |= ADVERTISE_1000FULL;
155 if (advertise & ADVERTISED_1000baseT_Half)
156 adv |= ADVERTISE_1000HALF;
157 phy_write(phy, MII_CTRL1000, adv);
158 }
159
160 /* Start/Restart aneg */
161 ctl = phy_read(phy, MII_BMCR);
162 ctl |= (BMCR_ANENABLE | BMCR_ANRESTART);
163 phy_write(phy, MII_BMCR, ctl);
164
165 return 0;
166}
167
168static int genmii_setup_forced(struct mii_phy *phy, int speed, int fd)
169{
170 int ctl;
171
172 phy->autoneg = AUTONEG_DISABLE;
173 phy->speed = speed;
174 phy->duplex = fd;
175 phy->pause = phy->asym_pause = 0;
176
177 ctl = phy_read(phy, MII_BMCR);
178 if (ctl < 0)
179 return ctl;
180 ctl &= ~(BMCR_FULLDPLX | BMCR_SPEED100 | BMCR_SPEED1000 | BMCR_ANENABLE);
181
182 /* First clear the PHY */
183 phy_write(phy, MII_BMCR, ctl | BMCR_RESET);
184
185 /* Select speed & duplex */
186 switch (speed) {
187 case SPEED_10:
188 break;
189 case SPEED_100:
190 ctl |= BMCR_SPEED100;
191 break;
192 case SPEED_1000:
193 ctl |= BMCR_SPEED1000;
194 break;
195 default:
196 return -EINVAL;
197 }
198 if (fd == DUPLEX_FULL)
199 ctl |= BMCR_FULLDPLX;
200 phy_write(phy, MII_BMCR, ctl);
201
202 return 0;
203}
204
205static int genmii_poll_link(struct mii_phy *phy)
206{
207 int status;
208
209 /* Clear latched value with dummy read */
210 phy_read(phy, MII_BMSR);
211 status = phy_read(phy, MII_BMSR);
212 if (status < 0 || (status & BMSR_LSTATUS) == 0)
213 return 0;
214 if (phy->autoneg == AUTONEG_ENABLE && !(status & BMSR_ANEGCOMPLETE))
215 return 0;
216 return 1;
217}
218
219static int genmii_read_link(struct mii_phy *phy)
220{
221 if (phy->autoneg == AUTONEG_ENABLE) {
222 int glpa = 0;
223 int lpa = phy_read(phy, MII_LPA) & phy_read(phy, MII_ADVERTISE);
224 if (lpa < 0)
225 return lpa;
226
227 if (phy->features &
228 (SUPPORTED_1000baseT_Full | SUPPORTED_1000baseT_Half)) {
229 int adv = phy_read(phy, MII_CTRL1000);
230 glpa = phy_read(phy, MII_STAT1000);
231
232 if (glpa < 0 || adv < 0)
233 return adv;
234
235 glpa &= adv << 2;
236 }
237
238 phy->speed = SPEED_10;
239 phy->duplex = DUPLEX_HALF;
240 phy->pause = phy->asym_pause = 0;
241
242 if (glpa & (LPA_1000FULL | LPA_1000HALF)) {
243 phy->speed = SPEED_1000;
244 if (glpa & LPA_1000FULL)
245 phy->duplex = DUPLEX_FULL;
246 } else if (lpa & (LPA_100FULL | LPA_100HALF)) {
247 phy->speed = SPEED_100;
248 if (lpa & LPA_100FULL)
249 phy->duplex = DUPLEX_FULL;
250 } else if (lpa & LPA_10FULL)
251 phy->duplex = DUPLEX_FULL;
252
253 if (phy->duplex == DUPLEX_FULL) {
254 phy->pause = lpa & LPA_PAUSE_CAP ? 1 : 0;
255 phy->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0;
256 }
257 } else {
258 int bmcr = phy_read(phy, MII_BMCR);
259 if (bmcr < 0)
260 return bmcr;
261
262 if (bmcr & BMCR_FULLDPLX)
263 phy->duplex = DUPLEX_FULL;
264 else
265 phy->duplex = DUPLEX_HALF;
266 if (bmcr & BMCR_SPEED1000)
267 phy->speed = SPEED_1000;
268 else if (bmcr & BMCR_SPEED100)
269 phy->speed = SPEED_100;
270 else
271 phy->speed = SPEED_10;
272
273 phy->pause = phy->asym_pause = 0;
274 }
275 return 0;
276}
277
278/* Generic implementation for most 10/100/1000 PHYs */
279static struct mii_phy_ops generic_phy_ops = {
280 .setup_aneg = genmii_setup_aneg,
281 .setup_forced = genmii_setup_forced,
282 .poll_link = genmii_poll_link,
283 .read_link = genmii_read_link
284};
285
286static struct mii_phy_def genmii_phy_def = {
287 .phy_id = 0x00000000,
288 .phy_id_mask = 0x00000000,
289 .name = "Generic MII",
290 .ops = &generic_phy_ops
291};
292
293/* CIS8201 */
294#define MII_CIS8201_10BTCSR 0x16
295#define TENBTCSR_ECHO_DISABLE 0x2000
296#define MII_CIS8201_EPCR 0x17
297#define EPCR_MODE_MASK 0x3000
298#define EPCR_GMII_MODE 0x0000
299#define EPCR_RGMII_MODE 0x1000
300#define EPCR_TBI_MODE 0x2000
301#define EPCR_RTBI_MODE 0x3000
302#define MII_CIS8201_ACSR 0x1c
303#define ACSR_PIN_PRIO_SELECT 0x0004
304
305static int cis8201_init(struct mii_phy *phy)
306{
307 int epcr;
308
309 epcr = phy_read(phy, MII_CIS8201_EPCR);
310 if (epcr < 0)
311 return epcr;
312
313 epcr &= ~EPCR_MODE_MASK;
314
315 switch (phy->mode) {
316 case PHY_MODE_TBI:
317 epcr |= EPCR_TBI_MODE;
318 break;
319 case PHY_MODE_RTBI:
320 epcr |= EPCR_RTBI_MODE;
321 break;
322 case PHY_MODE_GMII:
323 epcr |= EPCR_GMII_MODE;
324 break;
325 case PHY_MODE_RGMII:
326 default:
327 epcr |= EPCR_RGMII_MODE;
328 }
329
330 phy_write(phy, MII_CIS8201_EPCR, epcr);
331
332 /* MII regs override strap pins */
333 phy_write(phy, MII_CIS8201_ACSR,
334 phy_read(phy, MII_CIS8201_ACSR) | ACSR_PIN_PRIO_SELECT);
335
336 /* Disable TX_EN -> CRS echo mode, otherwise 10/HDX doesn't work */
337 phy_write(phy, MII_CIS8201_10BTCSR,
338 phy_read(phy, MII_CIS8201_10BTCSR) | TENBTCSR_ECHO_DISABLE);
339
340 return 0;
341}
342
343static struct mii_phy_ops cis8201_phy_ops = {
344 .init = cis8201_init,
345 .setup_aneg = genmii_setup_aneg,
346 .setup_forced = genmii_setup_forced,
347 .poll_link = genmii_poll_link,
348 .read_link = genmii_read_link
349};
350
351static struct mii_phy_def cis8201_phy_def = {
352 .phy_id = 0x000fc410,
353 .phy_id_mask = 0x000ffff0,
354 .name = "CIS8201 Gigabit Ethernet",
355 .ops = &cis8201_phy_ops
356};
357
358static struct mii_phy_def bcm5248_phy_def = {
359
360 .phy_id = 0x0143bc00,
361 .phy_id_mask = 0x0ffffff0,
362 .name = "BCM5248 10/100 SMII Ethernet",
363 .ops = &generic_phy_ops
364};
365
366static int m88e1111_init(struct mii_phy *phy)
367{
368 pr_debug("%s: Marvell 88E1111 Ethernet\n", __func__);
369 phy_write(phy, 0x14, 0x0ce3);
370 phy_write(phy, 0x18, 0x4101);
371 phy_write(phy, 0x09, 0x0e00);
372 phy_write(phy, 0x04, 0x01e1);
373 phy_write(phy, 0x00, 0x9140);
374 phy_write(phy, 0x00, 0x1140);
375
376 return 0;
377}
378
379static int m88e1112_init(struct mii_phy *phy)
380{
381 /*
382 * Marvell 88E1112 PHY needs to have the SGMII MAC
383 * interace (page 2) properly configured to
384 * communicate with the 460EX/GT GPCS interface.
385 */
386
387 u16 reg_short;
388
389 pr_debug("%s: Marvell 88E1112 Ethernet\n", __func__);
390
391 /* Set access to Page 2 */
392 phy_write(phy, 0x16, 0x0002);
393
394 phy_write(phy, 0x00, 0x0040); /* 1Gbps */
395 reg_short = (u16)(phy_read(phy, 0x1a));
396 reg_short |= 0x8000; /* bypass Auto-Negotiation */
397 phy_write(phy, 0x1a, reg_short);
398 emac_mii_reset_phy(phy); /* reset MAC interface */
399
400 /* Reset access to Page 0 */
401 phy_write(phy, 0x16, 0x0000);
402
403 return 0;
404}
405
406static int et1011c_init(struct mii_phy *phy)
407{
408 u16 reg_short;
409
410 reg_short = (u16)(phy_read(phy, 0x16));
411 reg_short &= ~(0x7);
412 reg_short |= 0x6; /* RGMII Trace Delay*/
413 phy_write(phy, 0x16, reg_short);
414
415 reg_short = (u16)(phy_read(phy, 0x17));
416 reg_short &= ~(0x40);
417 phy_write(phy, 0x17, reg_short);
418
419 phy_write(phy, 0x1c, 0x74f0);
420 return 0;
421}
422
423static struct mii_phy_ops et1011c_phy_ops = {
424 .init = et1011c_init,
425 .setup_aneg = genmii_setup_aneg,
426 .setup_forced = genmii_setup_forced,
427 .poll_link = genmii_poll_link,
428 .read_link = genmii_read_link
429};
430
431static struct mii_phy_def et1011c_phy_def = {
432 .phy_id = 0x0282f000,
433 .phy_id_mask = 0x0fffff00,
434 .name = "ET1011C Gigabit Ethernet",
435 .ops = &et1011c_phy_ops
436};
437
438
439
440
441
442static struct mii_phy_ops m88e1111_phy_ops = {
443 .init = m88e1111_init,
444 .setup_aneg = genmii_setup_aneg,
445 .setup_forced = genmii_setup_forced,
446 .poll_link = genmii_poll_link,
447 .read_link = genmii_read_link
448};
449
450static struct mii_phy_def m88e1111_phy_def = {
451
452 .phy_id = 0x01410CC0,
453 .phy_id_mask = 0x0ffffff0,
454 .name = "Marvell 88E1111 Ethernet",
455 .ops = &m88e1111_phy_ops,
456};
457
458static struct mii_phy_ops m88e1112_phy_ops = {
459 .init = m88e1112_init,
460 .setup_aneg = genmii_setup_aneg,
461 .setup_forced = genmii_setup_forced,
462 .poll_link = genmii_poll_link,
463 .read_link = genmii_read_link
464};
465
466static struct mii_phy_def m88e1112_phy_def = {
467 .phy_id = 0x01410C90,
468 .phy_id_mask = 0x0ffffff0,
469 .name = "Marvell 88E1112 Ethernet",
470 .ops = &m88e1112_phy_ops,
471};
472
473static struct mii_phy_def *mii_phy_table[] = {
474 &et1011c_phy_def,
475 &cis8201_phy_def,
476 &bcm5248_phy_def,
477 &m88e1111_phy_def,
478 &m88e1112_phy_def,
479 &genmii_phy_def,
480 NULL
481};
482
483int emac_mii_phy_probe(struct mii_phy *phy, int address)
484{
485 struct mii_phy_def *def;
486 int i;
487 u32 id;
488
489 phy->autoneg = AUTONEG_DISABLE;
490 phy->advertising = 0;
491 phy->address = address;
492 phy->speed = SPEED_10;
493 phy->duplex = DUPLEX_HALF;
494 phy->pause = phy->asym_pause = 0;
495
496 /* Take PHY out of isolate mode and reset it. */
497 if (emac_mii_reset_phy(phy))
498 return -ENODEV;
499
500 /* Read ID and find matching entry */
501 id = (phy_read(phy, MII_PHYSID1) << 16) | phy_read(phy, MII_PHYSID2);
502 for (i = 0; (def = mii_phy_table[i]) != NULL; i++)
503 if ((id & def->phy_id_mask) == def->phy_id)
504 break;
505 /* Should never be NULL (we have a generic entry), but... */
506 if (!def)
507 return -ENODEV;
508
509 phy->def = def;
510
511 /* Determine PHY features if needed */
512 phy->features = def->features;
513 if (!phy->features) {
514 u16 bmsr = phy_read(phy, MII_BMSR);
515 if (bmsr & BMSR_ANEGCAPABLE)
516 phy->features |= SUPPORTED_Autoneg;
517 if (bmsr & BMSR_10HALF)
518 phy->features |= SUPPORTED_10baseT_Half;
519 if (bmsr & BMSR_10FULL)
520 phy->features |= SUPPORTED_10baseT_Full;
521 if (bmsr & BMSR_100HALF)
522 phy->features |= SUPPORTED_100baseT_Half;
523 if (bmsr & BMSR_100FULL)
524 phy->features |= SUPPORTED_100baseT_Full;
525 if (bmsr & BMSR_ESTATEN) {
526 u16 esr = phy_read(phy, MII_ESTATUS);
527 if (esr & ESTATUS_1000_TFULL)
528 phy->features |= SUPPORTED_1000baseT_Full;
529 if (esr & ESTATUS_1000_THALF)
530 phy->features |= SUPPORTED_1000baseT_Half;
531 }
532 phy->features |= SUPPORTED_MII;
533 }
534
535 /* Setup default advertising */
536 phy->advertising = phy->features;
537
538 return 0;
539}
540
541MODULE_LICENSE("GPL");
generated by cgit v1.2.2 (git 2.25.0) at 2025-07-18 13:42:19 -0400