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
__bcm_phy_write_exp(struct phy_device * phydev,u16 reg,u16 val)21 int __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 }
31 EXPORT_SYMBOL_GPL(__bcm_phy_write_exp);
32
bcm_phy_write_exp(struct phy_device * phydev,u16 reg,u16 val)33 int 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 }
43 EXPORT_SYMBOL_GPL(bcm_phy_write_exp);
44
__bcm_phy_read_exp(struct phy_device * phydev,u16 reg)45 int __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 }
60 EXPORT_SYMBOL_GPL(__bcm_phy_read_exp);
61
bcm_phy_read_exp(struct phy_device * phydev,u16 reg)62 int 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 }
72 EXPORT_SYMBOL_GPL(bcm_phy_read_exp);
73
__bcm_phy_modify_exp(struct phy_device * phydev,u16 reg,u16 mask,u16 set)74 int __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 }
92 EXPORT_SYMBOL_GPL(__bcm_phy_modify_exp);
93
bcm_phy_modify_exp(struct phy_device * phydev,u16 reg,u16 mask,u16 set)94 int 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 }
104 EXPORT_SYMBOL_GPL(bcm_phy_modify_exp);
105
bcm54xx_auxctl_read(struct phy_device * phydev,u16 regnum)106 int 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 }
115 EXPORT_SYMBOL_GPL(bcm54xx_auxctl_read);
116
bcm54xx_auxctl_write(struct phy_device * phydev,u16 regnum,u16 val)117 int bcm54xx_auxctl_write(struct phy_device *phydev, u16 regnum, u16 val)
118 {
119 return phy_write(phydev, MII_BCM54XX_AUX_CTL, regnum | val);
120 }
121 EXPORT_SYMBOL(bcm54xx_auxctl_write);
122
bcm_phy_write_misc(struct phy_device * phydev,u16 reg,u16 chl,u16 val)123 int 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 }
145 EXPORT_SYMBOL_GPL(bcm_phy_write_misc);
146
bcm_phy_read_misc(struct phy_device * phydev,u16 reg,u16 chl)147 int 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 }
169 EXPORT_SYMBOL_GPL(bcm_phy_read_misc);
170
bcm_phy_ack_intr(struct phy_device * phydev)171 int 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 }
182 EXPORT_SYMBOL_GPL(bcm_phy_ack_intr);
183
bcm_phy_config_intr(struct phy_device * phydev)184 int 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 }
209 EXPORT_SYMBOL_GPL(bcm_phy_config_intr);
210
bcm_phy_handle_interrupt(struct phy_device * phydev)211 irqreturn_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 }
240 EXPORT_SYMBOL_GPL(bcm_phy_handle_interrupt);
241
bcm_phy_read_shadow(struct phy_device * phydev,u16 shadow)242 int 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 }
247 EXPORT_SYMBOL_GPL(bcm_phy_read_shadow);
248
bcm_phy_write_shadow(struct phy_device * phydev,u16 shadow,u16 val)249 int 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 }
257 EXPORT_SYMBOL_GPL(bcm_phy_write_shadow);
258
__bcm_phy_read_rdb(struct phy_device * phydev,u16 rdb)259 int __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 }
269 EXPORT_SYMBOL_GPL(__bcm_phy_read_rdb);
270
bcm_phy_read_rdb(struct phy_device * phydev,u16 rdb)271 int 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 }
281 EXPORT_SYMBOL_GPL(bcm_phy_read_rdb);
282
__bcm_phy_write_rdb(struct phy_device * phydev,u16 rdb,u16 val)283 int __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 }
293 EXPORT_SYMBOL_GPL(__bcm_phy_write_rdb);
294
bcm_phy_write_rdb(struct phy_device * phydev,u16 rdb,u16 val)295 int 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 }
305 EXPORT_SYMBOL_GPL(bcm_phy_write_rdb);
306
__bcm_phy_modify_rdb(struct phy_device * phydev,u16 rdb,u16 mask,u16 set)307 int __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 }
325 EXPORT_SYMBOL_GPL(__bcm_phy_modify_rdb);
326
bcm_phy_modify_rdb(struct phy_device * phydev,u16 rdb,u16 mask,u16 set)327 int 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 }
337 EXPORT_SYMBOL_GPL(bcm_phy_modify_rdb);
338
bcm_phy_enable_apd(struct phy_device * phydev,bool dll_pwr_down)339 int 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 }
370 EXPORT_SYMBOL_GPL(bcm_phy_enable_apd);
371
bcm_phy_set_eee(struct phy_device * phydev,bool enable)372 int 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 }
409 EXPORT_SYMBOL_GPL(bcm_phy_set_eee);
410
bcm_phy_downshift_get(struct phy_device * phydev,u8 * count)411 int 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 }
441 EXPORT_SYMBOL_GPL(bcm_phy_downshift_get);
442
bcm_phy_downshift_set(struct phy_device * phydev,u8 count)443 int 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 }
495 EXPORT_SYMBOL_GPL(bcm_phy_downshift_set);
496
497 struct 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 */
506 static 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
bcm_phy_get_sset_count(struct phy_device * phydev)515 int bcm_phy_get_sset_count(struct phy_device *phydev)
516 {
517 return ARRAY_SIZE(bcm_phy_hw_stats);
518 }
519 EXPORT_SYMBOL_GPL(bcm_phy_get_sset_count);
520
bcm_phy_get_strings(struct phy_device * phydev,u8 * data)521 void 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 strscpy(data + i * ETH_GSTRING_LEN,
527 bcm_phy_hw_stats[i].string, ETH_GSTRING_LEN);
528 }
529 EXPORT_SYMBOL_GPL(bcm_phy_get_strings);
530
531 /* Caller is supposed to provide appropriate storage for the library code to
532 * access the shadow copy
533 */
bcm_phy_get_stat(struct phy_device * phydev,u64 * shadow,unsigned int i)534 static u64 bcm_phy_get_stat(struct phy_device *phydev, u64 *shadow,
535 unsigned int i)
536 {
537 struct bcm_phy_hw_stat stat = bcm_phy_hw_stats[i];
538 int val;
539 u64 ret;
540
541 if (stat.devad < 0)
542 val = phy_read(phydev, stat.reg);
543 else
544 val = phy_read_mmd(phydev, stat.devad, stat.reg);
545 if (val < 0) {
546 ret = U64_MAX;
547 } else {
548 val >>= stat.shift;
549 val = val & ((1 << stat.bits) - 1);
550 shadow[i] += val;
551 ret = shadow[i];
552 }
553
554 return ret;
555 }
556
bcm_phy_get_stats(struct phy_device * phydev,u64 * shadow,struct ethtool_stats * stats,u64 * data)557 void bcm_phy_get_stats(struct phy_device *phydev, u64 *shadow,
558 struct ethtool_stats *stats, u64 *data)
559 {
560 unsigned int i;
561
562 for (i = 0; i < ARRAY_SIZE(bcm_phy_hw_stats); i++)
563 data[i] = bcm_phy_get_stat(phydev, shadow, i);
564 }
565 EXPORT_SYMBOL_GPL(bcm_phy_get_stats);
566
bcm_phy_r_rc_cal_reset(struct phy_device * phydev)567 void bcm_phy_r_rc_cal_reset(struct phy_device *phydev)
568 {
569 /* Reset R_CAL/RC_CAL Engine */
570 bcm_phy_write_exp_sel(phydev, 0x00b0, 0x0010);
571
572 /* Disable Reset R_AL/RC_CAL Engine */
573 bcm_phy_write_exp_sel(phydev, 0x00b0, 0x0000);
574 }
575 EXPORT_SYMBOL_GPL(bcm_phy_r_rc_cal_reset);
576
bcm_phy_28nm_a0b0_afe_config_init(struct phy_device * phydev)577 int bcm_phy_28nm_a0b0_afe_config_init(struct phy_device *phydev)
578 {
579 /* Increase VCO range to prevent unlocking problem of PLL at low
580 * temp
581 */
582 bcm_phy_write_misc(phydev, PLL_PLLCTRL_1, 0x0048);
583
584 /* Change Ki to 011 */
585 bcm_phy_write_misc(phydev, PLL_PLLCTRL_2, 0x021b);
586
587 /* Disable loading of TVCO buffer to bandgap, set bandgap trim
588 * to 111
589 */
590 bcm_phy_write_misc(phydev, PLL_PLLCTRL_4, 0x0e20);
591
592 /* Adjust bias current trim by -3 */
593 bcm_phy_write_misc(phydev, DSP_TAP10, 0x690b);
594
595 /* Switch to CORE_BASE1E */
596 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0xd);
597
598 bcm_phy_r_rc_cal_reset(phydev);
599
600 /* write AFE_RXCONFIG_0 */
601 bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb19);
602
603 /* write AFE_RXCONFIG_1 */
604 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9a3f);
605
606 /* write AFE_RX_LP_COUNTER */
607 bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
608
609 /* write AFE_HPF_TRIM_OTHERS */
610 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x000b);
611
612 /* write AFTE_TX_CONFIG */
613 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x0800);
614
615 return 0;
616 }
617 EXPORT_SYMBOL_GPL(bcm_phy_28nm_a0b0_afe_config_init);
618
bcm_phy_enable_jumbo(struct phy_device * phydev)619 int bcm_phy_enable_jumbo(struct phy_device *phydev)
620 {
621 int ret;
622
623 ret = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL);
624 if (ret < 0)
625 return ret;
626
627 /* Enable extended length packet reception */
628 ret = bcm54xx_auxctl_write(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_AUXCTL,
629 ret | MII_BCM54XX_AUXCTL_ACTL_EXT_PKT_LEN);
630 if (ret < 0)
631 return ret;
632
633 /* Enable the elastic FIFO for raising the transmission limit from
634 * 4.5KB to 10KB, at the expense of an additional 16 ns in propagation
635 * latency.
636 */
637 return phy_set_bits(phydev, MII_BCM54XX_ECR, MII_BCM54XX_ECR_FIFOE);
638 }
639 EXPORT_SYMBOL_GPL(bcm_phy_enable_jumbo);
640
__bcm_phy_enable_rdb_access(struct phy_device * phydev)641 static int __bcm_phy_enable_rdb_access(struct phy_device *phydev)
642 {
643 return __bcm_phy_write_exp(phydev, BCM54XX_EXP_REG7E, 0);
644 }
645
__bcm_phy_enable_legacy_access(struct phy_device * phydev)646 static int __bcm_phy_enable_legacy_access(struct phy_device *phydev)
647 {
648 return __bcm_phy_write_rdb(phydev, BCM54XX_RDB_REG0087,
649 BCM54XX_ACCESS_MODE_LEGACY_EN);
650 }
651
_bcm_phy_cable_test_start(struct phy_device * phydev,bool is_rdb)652 static int _bcm_phy_cable_test_start(struct phy_device *phydev, bool is_rdb)
653 {
654 u16 mask, set;
655 int ret;
656
657 /* Auto-negotiation must be enabled for cable diagnostics to work, but
658 * don't advertise any capabilities.
659 */
660 phy_write(phydev, MII_BMCR, BMCR_ANENABLE);
661 phy_write(phydev, MII_ADVERTISE, ADVERTISE_CSMA);
662 phy_write(phydev, MII_CTRL1000, 0);
663
664 phy_lock_mdio_bus(phydev);
665 if (is_rdb) {
666 ret = __bcm_phy_enable_legacy_access(phydev);
667 if (ret)
668 goto out;
669 }
670
671 mask = BCM54XX_ECD_CTRL_CROSS_SHORT_DIS | BCM54XX_ECD_CTRL_UNIT_MASK;
672 set = BCM54XX_ECD_CTRL_RUN | BCM54XX_ECD_CTRL_BREAK_LINK |
673 FIELD_PREP(BCM54XX_ECD_CTRL_UNIT_MASK,
674 BCM54XX_ECD_CTRL_UNIT_CM);
675
676 ret = __bcm_phy_modify_exp(phydev, BCM54XX_EXP_ECD_CTRL, mask, set);
677
678 out:
679 /* re-enable the RDB access even if there was an error */
680 if (is_rdb)
681 ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
682
683 phy_unlock_mdio_bus(phydev);
684
685 return ret;
686 }
687
bcm_phy_cable_test_report_trans(int result)688 static int bcm_phy_cable_test_report_trans(int result)
689 {
690 switch (result) {
691 case BCM54XX_ECD_FAULT_TYPE_OK:
692 return ETHTOOL_A_CABLE_RESULT_CODE_OK;
693 case BCM54XX_ECD_FAULT_TYPE_OPEN:
694 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
695 case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
696 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
697 case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
698 return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
699 case BCM54XX_ECD_FAULT_TYPE_INVALID:
700 case BCM54XX_ECD_FAULT_TYPE_BUSY:
701 default:
702 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
703 }
704 }
705
bcm_phy_distance_valid(int result)706 static bool bcm_phy_distance_valid(int result)
707 {
708 switch (result) {
709 case BCM54XX_ECD_FAULT_TYPE_OPEN:
710 case BCM54XX_ECD_FAULT_TYPE_SAME_SHORT:
711 case BCM54XX_ECD_FAULT_TYPE_CROSS_SHORT:
712 return true;
713 }
714 return false;
715 }
716
bcm_phy_report_length(struct phy_device * phydev,int pair)717 static int bcm_phy_report_length(struct phy_device *phydev, int pair)
718 {
719 int val;
720
721 val = __bcm_phy_read_exp(phydev,
722 BCM54XX_EXP_ECD_PAIR_A_LENGTH_RESULTS + pair);
723 if (val < 0)
724 return val;
725
726 if (val == BCM54XX_ECD_LENGTH_RESULTS_INVALID)
727 return 0;
728
729 ethnl_cable_test_fault_length(phydev, pair, val);
730
731 return 0;
732 }
733
_bcm_phy_cable_test_get_status(struct phy_device * phydev,bool * finished,bool is_rdb)734 static int _bcm_phy_cable_test_get_status(struct phy_device *phydev,
735 bool *finished, bool is_rdb)
736 {
737 int pair_a, pair_b, pair_c, pair_d, ret;
738
739 *finished = false;
740
741 phy_lock_mdio_bus(phydev);
742
743 if (is_rdb) {
744 ret = __bcm_phy_enable_legacy_access(phydev);
745 if (ret)
746 goto out;
747 }
748
749 ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_CTRL);
750 if (ret < 0)
751 goto out;
752
753 if (ret & BCM54XX_ECD_CTRL_IN_PROGRESS) {
754 ret = 0;
755 goto out;
756 }
757
758 ret = __bcm_phy_read_exp(phydev, BCM54XX_EXP_ECD_FAULT_TYPE);
759 if (ret < 0)
760 goto out;
761
762 pair_a = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_A_MASK, ret);
763 pair_b = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_B_MASK, ret);
764 pair_c = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_C_MASK, ret);
765 pair_d = FIELD_GET(BCM54XX_ECD_FAULT_TYPE_PAIR_D_MASK, ret);
766
767 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
768 bcm_phy_cable_test_report_trans(pair_a));
769 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_B,
770 bcm_phy_cable_test_report_trans(pair_b));
771 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_C,
772 bcm_phy_cable_test_report_trans(pair_c));
773 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_D,
774 bcm_phy_cable_test_report_trans(pair_d));
775
776 if (bcm_phy_distance_valid(pair_a))
777 bcm_phy_report_length(phydev, 0);
778 if (bcm_phy_distance_valid(pair_b))
779 bcm_phy_report_length(phydev, 1);
780 if (bcm_phy_distance_valid(pair_c))
781 bcm_phy_report_length(phydev, 2);
782 if (bcm_phy_distance_valid(pair_d))
783 bcm_phy_report_length(phydev, 3);
784
785 ret = 0;
786 *finished = true;
787 out:
788 /* re-enable the RDB access even if there was an error */
789 if (is_rdb)
790 ret = __bcm_phy_enable_rdb_access(phydev) ? : ret;
791
792 phy_unlock_mdio_bus(phydev);
793
794 return ret;
795 }
796
bcm_phy_cable_test_start(struct phy_device * phydev)797 int bcm_phy_cable_test_start(struct phy_device *phydev)
798 {
799 return _bcm_phy_cable_test_start(phydev, false);
800 }
801 EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start);
802
bcm_phy_cable_test_get_status(struct phy_device * phydev,bool * finished)803 int bcm_phy_cable_test_get_status(struct phy_device *phydev, bool *finished)
804 {
805 return _bcm_phy_cable_test_get_status(phydev, finished, false);
806 }
807 EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status);
808
809 /* We assume that all PHYs which support RDB access can be switched to legacy
810 * mode. If, in the future, this is not true anymore, we have to re-implement
811 * this with RDB access.
812 */
bcm_phy_cable_test_start_rdb(struct phy_device * phydev)813 int bcm_phy_cable_test_start_rdb(struct phy_device *phydev)
814 {
815 return _bcm_phy_cable_test_start(phydev, true);
816 }
817 EXPORT_SYMBOL_GPL(bcm_phy_cable_test_start_rdb);
818
bcm_phy_cable_test_get_status_rdb(struct phy_device * phydev,bool * finished)819 int bcm_phy_cable_test_get_status_rdb(struct phy_device *phydev,
820 bool *finished)
821 {
822 return _bcm_phy_cable_test_get_status(phydev, finished, true);
823 }
824 EXPORT_SYMBOL_GPL(bcm_phy_cable_test_get_status_rdb);
825
826 #define BCM54XX_WOL_SUPPORTED_MASK (WAKE_UCAST | \
827 WAKE_MCAST | \
828 WAKE_BCAST | \
829 WAKE_MAGIC | \
830 WAKE_MAGICSECURE)
831
bcm_phy_set_wol(struct phy_device * phydev,struct ethtool_wolinfo * wol)832 int bcm_phy_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
833 {
834 struct net_device *ndev = phydev->attached_dev;
835 u8 da[ETH_ALEN], mask[ETH_ALEN];
836 unsigned int i;
837 u16 ctl;
838 int ret;
839
840 /* Allow a MAC driver to play through its own Wake-on-LAN
841 * implementation
842 */
843 if (wol->wolopts & ~BCM54XX_WOL_SUPPORTED_MASK)
844 return -EOPNOTSUPP;
845
846 /* The PHY supports passwords of 4, 6 and 8 bytes in size, but Linux's
847 * ethtool only supports 6, for now.
848 */
849 BUILD_BUG_ON(sizeof(wol->sopass) != ETH_ALEN);
850
851 /* Clear previous interrupts */
852 ret = bcm_phy_read_exp(phydev, BCM54XX_WOL_INT_STATUS);
853 if (ret < 0)
854 return ret;
855
856 ret = bcm_phy_read_exp(phydev, BCM54XX_WOL_MAIN_CTL);
857 if (ret < 0)
858 return ret;
859
860 ctl = ret;
861
862 if (!wol->wolopts) {
863 if (phy_interrupt_is_valid(phydev))
864 disable_irq_wake(phydev->irq);
865
866 /* Leave all interrupts disabled */
867 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_INT_MASK,
868 BCM54XX_WOL_ALL_INTRS);
869 if (ret < 0)
870 return ret;
871
872 /* Disable the global Wake-on-LAN enable bit */
873 ctl &= ~BCM54XX_WOL_EN;
874
875 return bcm_phy_write_exp(phydev, BCM54XX_WOL_MAIN_CTL, ctl);
876 }
877
878 /* Clear the previously configured mode and mask mode for Wake-on-LAN */
879 ctl &= ~(BCM54XX_WOL_MODE_MASK << BCM54XX_WOL_MODE_SHIFT);
880 ctl &= ~(BCM54XX_WOL_MASK_MODE_MASK << BCM54XX_WOL_MASK_MODE_SHIFT);
881 ctl &= ~BCM54XX_WOL_DIR_PKT_EN;
882 ctl &= ~(BCM54XX_WOL_SECKEY_OPT_MASK << BCM54XX_WOL_SECKEY_OPT_SHIFT);
883
884 /* When using WAKE_MAGIC, we program the magic pattern filter to match
885 * the device's MAC address and we accept any MAC DA in the Ethernet
886 * frame.
887 *
888 * When using WAKE_UCAST, WAKE_BCAST or WAKE_MCAST, we program the
889 * following:
890 * - WAKE_UCAST -> MAC DA is the device's MAC with a perfect match
891 * - WAKE_MCAST -> MAC DA is X1:XX:XX:XX:XX:XX where XX is don't care
892 * - WAKE_BCAST -> MAC DA is FF:FF:FF:FF:FF:FF with a perfect match
893 *
894 * Note that the Broadcast MAC DA is inherently going to match the
895 * multicast pattern being matched.
896 */
897 memset(mask, 0, sizeof(mask));
898
899 if (wol->wolopts & WAKE_MCAST) {
900 memset(da, 0, sizeof(da));
901 memset(mask, 0xff, sizeof(mask));
902 da[0] = 0x01;
903 mask[0] = ~da[0];
904 } else {
905 if (wol->wolopts & WAKE_UCAST) {
906 ether_addr_copy(da, ndev->dev_addr);
907 } else if (wol->wolopts & WAKE_BCAST) {
908 eth_broadcast_addr(da);
909 } else if (wol->wolopts & WAKE_MAGICSECURE) {
910 ether_addr_copy(da, wol->sopass);
911 } else if (wol->wolopts & WAKE_MAGIC) {
912 memset(da, 0, sizeof(da));
913 memset(mask, 0xff, sizeof(mask));
914 }
915 }
916
917 for (i = 0; i < ETH_ALEN / 2; i++) {
918 if (wol->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE)) {
919 ret = bcm_phy_write_exp(phydev,
920 BCM54XX_WOL_MPD_DATA1(2 - i),
921 ndev->dev_addr[i * 2] << 8 |
922 ndev->dev_addr[i * 2 + 1]);
923 if (ret < 0)
924 return ret;
925 }
926
927 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_MPD_DATA2(2 - i),
928 da[i * 2] << 8 | da[i * 2 + 1]);
929 if (ret < 0)
930 return ret;
931
932 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_MASK(2 - i),
933 mask[i * 2] << 8 | mask[i * 2 + 1]);
934 if (ret)
935 return ret;
936 }
937
938 if (wol->wolopts & WAKE_MAGICSECURE) {
939 ctl |= BCM54XX_WOL_SECKEY_OPT_6B <<
940 BCM54XX_WOL_SECKEY_OPT_SHIFT;
941 ctl |= BCM54XX_WOL_MODE_SINGLE_MPDSEC << BCM54XX_WOL_MODE_SHIFT;
942 ctl |= BCM54XX_WOL_MASK_MODE_DA_FF <<
943 BCM54XX_WOL_MASK_MODE_SHIFT;
944 } else {
945 if (wol->wolopts & WAKE_MAGIC)
946 ctl |= BCM54XX_WOL_MODE_SINGLE_MPD;
947 else
948 ctl |= BCM54XX_WOL_DIR_PKT_EN;
949 ctl |= BCM54XX_WOL_MASK_MODE_DA_ONLY <<
950 BCM54XX_WOL_MASK_MODE_SHIFT;
951 }
952
953 /* Globally enable Wake-on-LAN */
954 ctl |= BCM54XX_WOL_EN | BCM54XX_WOL_CRC_CHK;
955
956 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_MAIN_CTL, ctl);
957 if (ret < 0)
958 return ret;
959
960 /* Enable WOL interrupt on LED4 */
961 ret = bcm_phy_read_exp(phydev, BCM54XX_TOP_MISC_LED_CTL);
962 if (ret < 0)
963 return ret;
964
965 ret |= BCM54XX_LED4_SEL_INTR;
966 ret = bcm_phy_write_exp(phydev, BCM54XX_TOP_MISC_LED_CTL, ret);
967 if (ret < 0)
968 return ret;
969
970 /* Enable all Wake-on-LAN interrupt sources */
971 ret = bcm_phy_write_exp(phydev, BCM54XX_WOL_INT_MASK, 0);
972 if (ret < 0)
973 return ret;
974
975 if (phy_interrupt_is_valid(phydev))
976 enable_irq_wake(phydev->irq);
977
978 return 0;
979 }
980 EXPORT_SYMBOL_GPL(bcm_phy_set_wol);
981
bcm_phy_get_wol(struct phy_device * phydev,struct ethtool_wolinfo * wol)982 void bcm_phy_get_wol(struct phy_device *phydev, struct ethtool_wolinfo *wol)
983 {
984 struct net_device *ndev = phydev->attached_dev;
985 u8 da[ETH_ALEN];
986 unsigned int i;
987 int ret;
988 u16 ctl;
989
990 wol->supported = BCM54XX_WOL_SUPPORTED_MASK;
991 wol->wolopts = 0;
992
993 ret = bcm_phy_read_exp(phydev, BCM54XX_WOL_MAIN_CTL);
994 if (ret < 0)
995 return;
996
997 ctl = ret;
998
999 if (!(ctl & BCM54XX_WOL_EN))
1000 return;
1001
1002 for (i = 0; i < sizeof(da) / 2; i++) {
1003 ret = bcm_phy_read_exp(phydev,
1004 BCM54XX_WOL_MPD_DATA2(2 - i));
1005 if (ret < 0)
1006 return;
1007
1008 da[i * 2] = ret >> 8;
1009 da[i * 2 + 1] = ret & 0xff;
1010 }
1011
1012 if (ctl & BCM54XX_WOL_DIR_PKT_EN) {
1013 if (is_broadcast_ether_addr(da))
1014 wol->wolopts |= WAKE_BCAST;
1015 else if (is_multicast_ether_addr(da))
1016 wol->wolopts |= WAKE_MCAST;
1017 else if (ether_addr_equal(da, ndev->dev_addr))
1018 wol->wolopts |= WAKE_UCAST;
1019 } else {
1020 ctl = (ctl >> BCM54XX_WOL_MODE_SHIFT) & BCM54XX_WOL_MODE_MASK;
1021 switch (ctl) {
1022 case BCM54XX_WOL_MODE_SINGLE_MPD:
1023 wol->wolopts |= WAKE_MAGIC;
1024 break;
1025 case BCM54XX_WOL_MODE_SINGLE_MPDSEC:
1026 wol->wolopts |= WAKE_MAGICSECURE;
1027 memcpy(wol->sopass, da, sizeof(da));
1028 break;
1029 default:
1030 break;
1031 }
1032 }
1033 }
1034 EXPORT_SYMBOL_GPL(bcm_phy_get_wol);
1035
bcm_phy_wol_isr(int irq,void * dev_id)1036 irqreturn_t bcm_phy_wol_isr(int irq, void *dev_id)
1037 {
1038 return IRQ_HANDLED;
1039 }
1040 EXPORT_SYMBOL_GPL(bcm_phy_wol_isr);
1041
bcm_phy_led_brightness_set(struct phy_device * phydev,u8 index,enum led_brightness value)1042 int bcm_phy_led_brightness_set(struct phy_device *phydev,
1043 u8 index, enum led_brightness value)
1044 {
1045 u8 led_num;
1046 int ret;
1047 u16 reg;
1048
1049 if (index >= 4)
1050 return -EINVAL;
1051
1052 /* Two LEDS per register */
1053 led_num = index % 2;
1054 reg = index >= 2 ? BCM54XX_SHD_LEDS2 : BCM54XX_SHD_LEDS1;
1055
1056 ret = bcm_phy_read_shadow(phydev, reg);
1057 if (ret < 0)
1058 return ret;
1059
1060 ret &= ~(BCM_LED_SRC_MASK << BCM54XX_SHD_LEDS_SHIFT(led_num));
1061 if (value == LED_OFF)
1062 ret |= BCM_LED_SRC_OFF << BCM54XX_SHD_LEDS_SHIFT(led_num);
1063 else
1064 ret |= BCM_LED_SRC_ON << BCM54XX_SHD_LEDS_SHIFT(led_num);
1065 return bcm_phy_write_shadow(phydev, reg, ret);
1066 }
1067 EXPORT_SYMBOL_GPL(bcm_phy_led_brightness_set);
1068
1069 MODULE_DESCRIPTION("Broadcom PHY Library");
1070 MODULE_LICENSE("GPL v2");
1071 MODULE_AUTHOR("Broadcom Corporation");
1072