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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Broadcom BCM7xxx internal transceivers support.
4 *
5 * Copyright (C) 2014-2017 Broadcom
6 */
7
8#include <linux/module.h>
9#include <linux/phy.h>
10#include <linux/delay.h>
11#include "bcm-phy-lib.h"
12#include <linux/bitops.h>
13#include <linux/brcmphy.h>
14#include <linux/clk.h>
15#include <linux/mdio.h>
16
17/* Broadcom BCM7xxx internal PHY registers */
18
19/* EPHY only register definitions */
20#define MII_BCM7XXX_100TX_AUX_CTL 0x10
21#define MII_BCM7XXX_100TX_FALSE_CAR 0x13
22#define MII_BCM7XXX_100TX_DISC 0x14
23#define MII_BCM7XXX_AUX_MODE 0x1d
24#define MII_BCM7XXX_64CLK_MDIO BIT(12)
25#define MII_BCM7XXX_TEST 0x1f
26#define MII_BCM7XXX_SHD_MODE_2 BIT(2)
27#define MII_BCM7XXX_SHD_2_ADDR_CTRL 0xe
28#define MII_BCM7XXX_SHD_2_CTRL_STAT 0xf
29#define MII_BCM7XXX_SHD_2_BIAS_TRIM 0x1a
30#define MII_BCM7XXX_SHD_3_PCS_CTRL 0x0
31#define MII_BCM7XXX_SHD_3_PCS_STATUS 0x1
32#define MII_BCM7XXX_SHD_3_EEE_CAP 0x2
33#define MII_BCM7XXX_SHD_3_AN_EEE_ADV 0x3
34#define MII_BCM7XXX_SHD_3_EEE_LP 0x4
35#define MII_BCM7XXX_SHD_3_EEE_WK_ERR 0x5
36#define MII_BCM7XXX_SHD_3_PCS_CTRL_2 0x6
37#define MII_BCM7XXX_PCS_CTRL_2_DEF 0x4400
38#define MII_BCM7XXX_SHD_3_AN_STAT 0xb
39#define MII_BCM7XXX_AN_NULL_MSG_EN BIT(0)
40#define MII_BCM7XXX_AN_EEE_EN BIT(1)
41#define MII_BCM7XXX_SHD_3_EEE_THRESH 0xe
42#define MII_BCM7XXX_EEE_THRESH_DEF 0x50
43#define MII_BCM7XXX_SHD_3_TL4 0x23
44#define MII_BCM7XXX_TL4_RST_MSK (BIT(2) | BIT(1))
45
46struct bcm7xxx_phy_priv {
47 u64 *stats;
48};
49
50static int bcm7xxx_28nm_d0_afe_config_init(struct phy_device *phydev)
51{
52 /* AFE_RXCONFIG_0 */
53 bcm_phy_write_misc(phydev, AFE_RXCONFIG_0, 0xeb15);
54
55 /* AFE_RXCONFIG_1 */
56 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f);
57
58 /* AFE_RXCONFIG_2, set rCal offset for HT=0 code and LT=-2 code */
59 bcm_phy_write_misc(phydev, AFE_RXCONFIG_2, 0x2003);
60
61 /* AFE_RX_LP_COUNTER, set RX bandwidth to maximum */
62 bcm_phy_write_misc(phydev, AFE_RX_LP_COUNTER, 0x7fc0);
63
64 /* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */
65 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431);
66
67 /* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
68 bcm_phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da);
69
70 /* AFE_VDAC_OTHERS_0, set 1000BT Cidac=010 for all ports */
71 bcm_phy_write_misc(phydev, AFE_VDAC_OTHERS_0, 0xa020);
72
73 /* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal
74 * offset for HT=0 code
75 */
76 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3);
77
78 /* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */
79 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x0010);
80
81 /* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */
82 bcm_phy_write_misc(phydev, DSP_TAP10, 0x011b);
83
84 /* Reset R_CAL/RC_CAL engine */
85 bcm_phy_r_rc_cal_reset(phydev);
86
87 return 0;
88}
89
90static int bcm7xxx_28nm_e0_plus_afe_config_init(struct phy_device *phydev)
91{
92 /* AFE_RXCONFIG_1, provide more margin for INL/DNL measurement */
93 bcm_phy_write_misc(phydev, AFE_RXCONFIG_1, 0x9b2f);
94
95 /* AFE_TX_CONFIG, set 100BT Cfeed=011 to improve rise/fall time */
96 bcm_phy_write_misc(phydev, AFE_TX_CONFIG, 0x431);
97
98 /* AFE_VDCA_ICTRL_0, set Iq=1101 instead of 0111 for AB symmetry */
99 bcm_phy_write_misc(phydev, AFE_VDCA_ICTRL_0, 0xa7da);
100
101 /* AFE_HPF_TRIM_OTHERS, set 100Tx/10BT to -4.5% swing and set rCal
102 * offset for HT=0 code
103 */
104 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x00e3);
105
106 /* CORE_BASE1E, force trim to overwrite and set I_ext trim to 0000 */
107 phy_write(phydev, MII_BRCM_CORE_BASE1E, 0x0010);
108
109 /* DSP_TAP10, adjust bias current trim (+0% swing, +0 tick) */
110 bcm_phy_write_misc(phydev, DSP_TAP10, 0x011b);
111
112 /* Reset R_CAL/RC_CAL engine */
113 bcm_phy_r_rc_cal_reset(phydev);
114
115 return 0;
116}
117
118static int bcm7xxx_28nm_a0_patch_afe_config_init(struct phy_device *phydev)
119{
120 /* +1 RC_CAL codes for RL centering for both LT and HT conditions */
121 bcm_phy_write_misc(phydev, AFE_RXCONFIG_2, 0xd003);
122
123 /* Cut master bias current by 2% to compensate for RC_CAL offset */
124 bcm_phy_write_misc(phydev, DSP_TAP10, 0x791b);
125
126 /* Improve hybrid leakage */
127 bcm_phy_write_misc(phydev, AFE_HPF_TRIM_OTHERS, 0x10e3);
128
129 /* Change rx_on_tune 8 to 0xf */
130 bcm_phy_write_misc(phydev, 0x21, 0x2, 0x87f6);
131
132 /* Change 100Tx EEE bandwidth */
133 bcm_phy_write_misc(phydev, 0x22, 0x2, 0x017d);
134
135 /* Enable ffe zero detection for Vitesse interoperability */
136 bcm_phy_write_misc(phydev, 0x26, 0x2, 0x0015);
137
138 bcm_phy_r_rc_cal_reset(phydev);
139
140 return 0;
141}
142
143static int bcm7xxx_28nm_config_init(struct phy_device *phydev)
144{
145 u8 rev = PHY_BRCM_7XXX_REV(phydev->dev_flags);
146 u8 patch = PHY_BRCM_7XXX_PATCH(phydev->dev_flags);
147 u8 count;
148 int ret = 0;
149
150 /* Newer devices have moved the revision information back into a
151 * standard location in MII_PHYS_ID[23]
152 */
153 if (rev == 0)
154 rev = phydev->phy_id & ~phydev->drv->phy_id_mask;
155
156 pr_info_once("%s: %s PHY revision: 0x%02x, patch: %d\n",
157 phydev_name(phydev), phydev->drv->name, rev, patch);
158
159 /* Dummy read to a register to workaround an issue upon reset where the
160 * internal inverter may not allow the first MDIO transaction to pass
161 * the MDIO management controller and make us return 0xffff for such
162 * reads.
163 */
164 phy_read(phydev, MII_BMSR);
165
166 switch (rev) {
167 case 0xa0:
168 case 0xb0:
169 ret = bcm_phy_28nm_a0b0_afe_config_init(phydev);
170 break;
171 case 0xd0:
172 ret = bcm7xxx_28nm_d0_afe_config_init(phydev);
173 break;
174 case 0xe0:
175 case 0xf0:
176 /* Rev G0 introduces a roll over */
177 case 0x10:
178 ret = bcm7xxx_28nm_e0_plus_afe_config_init(phydev);
179 break;
180 case 0x01:
181 ret = bcm7xxx_28nm_a0_patch_afe_config_init(phydev);
182 break;
183 default:
184 break;
185 }
186
187 if (ret)
188 return ret;
189
190 ret = bcm_phy_enable_jumbo(phydev);
191 if (ret)
192 return ret;
193
194 ret = bcm_phy_downshift_get(phydev, &count);
195 if (ret)
196 return ret;
197
198 /* Only enable EEE if Wirespeed/downshift is disabled */
199 ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE);
200 if (ret)
201 return ret;
202
203 return bcm_phy_enable_apd(phydev, true);
204}
205
206static int bcm7xxx_28nm_resume(struct phy_device *phydev)
207{
208 int ret;
209
210 /* Re-apply workarounds coming out suspend/resume */
211 ret = bcm7xxx_28nm_config_init(phydev);
212 if (ret)
213 return ret;
214
215 /* 28nm Gigabit PHYs come out of reset without any half-duplex
216 * or "hub" compliant advertised mode, fix that. This does not
217 * cause any problems with the PHY library since genphy_config_aneg()
218 * gracefully handles auto-negotiated and forced modes.
219 */
220 return genphy_config_aneg(phydev);
221}
222
223static int __phy_set_clr_bits(struct phy_device *dev, int location,
224 int set_mask, int clr_mask)
225{
226 int v, ret;
227
228 v = __phy_read(dev, location);
229 if (v < 0)
230 return v;
231
232 v &= ~clr_mask;
233 v |= set_mask;
234
235 ret = __phy_write(dev, location, v);
236 if (ret < 0)
237 return ret;
238
239 return v;
240}
241
242static int phy_set_clr_bits(struct phy_device *dev, int location,
243 int set_mask, int clr_mask)
244{
245 int ret;
246
247 mutex_lock(&dev->mdio.bus->mdio_lock);
248 ret = __phy_set_clr_bits(dev, location, set_mask, clr_mask);
249 mutex_unlock(&dev->mdio.bus->mdio_lock);
250
251 return ret;
252}
253
254static int bcm7xxx_28nm_ephy_01_afe_config_init(struct phy_device *phydev)
255{
256 int ret;
257
258 /* set shadow mode 2 */
259 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
260 MII_BCM7XXX_SHD_MODE_2, 0);
261 if (ret < 0)
262 return ret;
263
264 /* Set current trim values INT_trim = -1, Ext_trim =0 */
265 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_BIAS_TRIM, 0x3BE0);
266 if (ret < 0)
267 goto reset_shadow_mode;
268
269 /* Cal reset */
270 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL,
271 MII_BCM7XXX_SHD_3_TL4);
272 if (ret < 0)
273 goto reset_shadow_mode;
274 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT,
275 MII_BCM7XXX_TL4_RST_MSK, 0);
276 if (ret < 0)
277 goto reset_shadow_mode;
278
279 /* Cal reset disable */
280 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL,
281 MII_BCM7XXX_SHD_3_TL4);
282 if (ret < 0)
283 goto reset_shadow_mode;
284 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT,
285 0, MII_BCM7XXX_TL4_RST_MSK);
286 if (ret < 0)
287 goto reset_shadow_mode;
288
289reset_shadow_mode:
290 /* reset shadow mode 2 */
291 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0,
292 MII_BCM7XXX_SHD_MODE_2);
293 if (ret < 0)
294 return ret;
295
296 return 0;
297}
298
299/* The 28nm EPHY does not support Clause 45 (MMD) used by bcm-phy-lib */
300static int bcm7xxx_28nm_ephy_apd_enable(struct phy_device *phydev)
301{
302 int ret;
303
304 /* set shadow mode 1 */
305 ret = phy_set_clr_bits(phydev, MII_BRCM_FET_BRCMTEST,
306 MII_BRCM_FET_BT_SRE, 0);
307 if (ret < 0)
308 return ret;
309
310 /* Enable auto-power down */
311 ret = phy_set_clr_bits(phydev, MII_BRCM_FET_SHDW_AUXSTAT2,
312 MII_BRCM_FET_SHDW_AS2_APDE, 0);
313 if (ret < 0)
314 return ret;
315
316 /* reset shadow mode 1 */
317 ret = phy_set_clr_bits(phydev, MII_BRCM_FET_BRCMTEST, 0,
318 MII_BRCM_FET_BT_SRE);
319 if (ret < 0)
320 return ret;
321
322 return 0;
323}
324
325static int bcm7xxx_28nm_ephy_eee_enable(struct phy_device *phydev)
326{
327 int ret;
328
329 /* set shadow mode 2 */
330 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
331 MII_BCM7XXX_SHD_MODE_2, 0);
332 if (ret < 0)
333 return ret;
334
335 /* Advertise supported modes */
336 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL,
337 MII_BCM7XXX_SHD_3_AN_EEE_ADV);
338 if (ret < 0)
339 goto reset_shadow_mode;
340 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT,
341 MDIO_EEE_100TX);
342 if (ret < 0)
343 goto reset_shadow_mode;
344
345 /* Restore Defaults */
346 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL,
347 MII_BCM7XXX_SHD_3_PCS_CTRL_2);
348 if (ret < 0)
349 goto reset_shadow_mode;
350 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT,
351 MII_BCM7XXX_PCS_CTRL_2_DEF);
352 if (ret < 0)
353 goto reset_shadow_mode;
354
355 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL,
356 MII_BCM7XXX_SHD_3_EEE_THRESH);
357 if (ret < 0)
358 goto reset_shadow_mode;
359 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT,
360 MII_BCM7XXX_EEE_THRESH_DEF);
361 if (ret < 0)
362 goto reset_shadow_mode;
363
364 /* Enable EEE autonegotiation */
365 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL,
366 MII_BCM7XXX_SHD_3_AN_STAT);
367 if (ret < 0)
368 goto reset_shadow_mode;
369 ret = phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT,
370 (MII_BCM7XXX_AN_NULL_MSG_EN | MII_BCM7XXX_AN_EEE_EN));
371 if (ret < 0)
372 goto reset_shadow_mode;
373
374reset_shadow_mode:
375 /* reset shadow mode 2 */
376 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0,
377 MII_BCM7XXX_SHD_MODE_2);
378 if (ret < 0)
379 return ret;
380
381 /* Restart autoneg */
382 phy_write(phydev, MII_BMCR,
383 (BMCR_SPEED100 | BMCR_ANENABLE | BMCR_ANRESTART));
384
385 return 0;
386}
387
388static int bcm7xxx_28nm_ephy_config_init(struct phy_device *phydev)
389{
390 u8 rev = phydev->phy_id & ~phydev->drv->phy_id_mask;
391 int ret = 0;
392
393 pr_info_once("%s: %s PHY revision: 0x%02x\n",
394 phydev_name(phydev), phydev->drv->name, rev);
395
396 /* Dummy read to a register to workaround a possible issue upon reset
397 * where the internal inverter may not allow the first MDIO transaction
398 * to pass the MDIO management controller and make us return 0xffff for
399 * such reads.
400 */
401 phy_read(phydev, MII_BMSR);
402
403 /* Apply AFE software work-around if necessary */
404 if (rev == 0x01) {
405 ret = bcm7xxx_28nm_ephy_01_afe_config_init(phydev);
406 if (ret)
407 return ret;
408 }
409
410 ret = bcm7xxx_28nm_ephy_eee_enable(phydev);
411 if (ret)
412 return ret;
413
414 return bcm7xxx_28nm_ephy_apd_enable(phydev);
415}
416
417static int bcm7xxx_16nm_ephy_afe_config(struct phy_device *phydev)
418{
419 int tmp, rcalcode, rcalnewcodelp, rcalnewcode11, rcalnewcode11d2;
420
421 /* Reset PHY */
422 tmp = genphy_soft_reset(phydev);
423 if (tmp)
424 return tmp;
425
426 /* Reset AFE and PLL */
427 bcm_phy_write_exp_sel(phydev, 0x0003, 0x0006);
428 /* Clear reset */
429 bcm_phy_write_exp_sel(phydev, 0x0003, 0x0000);
430
431 /* Write PLL/AFE control register to select 54MHz crystal */
432 bcm_phy_write_misc(phydev, 0x0030, 0x0001, 0x0000);
433 bcm_phy_write_misc(phydev, 0x0031, 0x0000, 0x044a);
434
435 /* Change Ka,Kp,Ki to pdiv=1 */
436 bcm_phy_write_misc(phydev, 0x0033, 0x0002, 0x71a1);
437 /* Configuration override */
438 bcm_phy_write_misc(phydev, 0x0033, 0x0001, 0x8000);
439
440 /* Change PLL_NDIV and PLL_NUDGE */
441 bcm_phy_write_misc(phydev, 0x0031, 0x0001, 0x2f68);
442 bcm_phy_write_misc(phydev, 0x0031, 0x0002, 0x0000);
443
444 /* Reference frequency is 54Mhz, config_mode[15:14] = 3 (low
445 * phase)
446 */
447 bcm_phy_write_misc(phydev, 0x0030, 0x0003, 0xc036);
448
449 /* Initialize bypass mode */
450 bcm_phy_write_misc(phydev, 0x0032, 0x0003, 0x0000);
451 /* Bypass code, default: VCOCLK enabled */
452 bcm_phy_write_misc(phydev, 0x0033, 0x0000, 0x0002);
453 /* LDOs at default setting */
454 bcm_phy_write_misc(phydev, 0x0030, 0x0002, 0x01c0);
455 /* Release PLL reset */
456 bcm_phy_write_misc(phydev, 0x0030, 0x0001, 0x0001);
457
458 /* Bandgap curvature correction to correct default */
459 bcm_phy_write_misc(phydev, 0x0038, 0x0000, 0x0010);
460
461 /* Run RCAL */
462 bcm_phy_write_misc(phydev, 0x0039, 0x0003, 0x0038);
463 bcm_phy_write_misc(phydev, 0x0039, 0x0003, 0x003b);
464 udelay(2);
465 bcm_phy_write_misc(phydev, 0x0039, 0x0003, 0x003f);
466 mdelay(5);
467
468 /* AFE_CAL_CONFIG_0, Vref=1000, Target=10, averaging enabled */
469 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x1c82);
470 /* AFE_CAL_CONFIG_0, no reset and analog powerup */
471 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9e82);
472 udelay(2);
473 /* AFE_CAL_CONFIG_0, start calibration */
474 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9f82);
475 udelay(100);
476 /* AFE_CAL_CONFIG_0, clear start calibration, set HiBW */
477 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9e86);
478 udelay(2);
479 /* AFE_CAL_CONFIG_0, start calibration with hi BW mode set */
480 bcm_phy_write_misc(phydev, 0x0039, 0x0001, 0x9f86);
481 udelay(100);
482
483 /* Adjust 10BT amplitude additional +7% and 100BT +2% */
484 bcm_phy_write_misc(phydev, 0x0038, 0x0001, 0xe7ea);
485 /* Adjust 1G mode amplitude and 1G testmode1 */
486 bcm_phy_write_misc(phydev, 0x0038, 0x0002, 0xede0);
487
488 /* Read CORE_EXPA9 */
489 tmp = bcm_phy_read_exp_sel(phydev, 0x00a9);
490 /* CORE_EXPA9[6:1] is rcalcode[5:0] */
491 rcalcode = (tmp & 0x7e) / 2;
492 /* Correct RCAL code + 1 is -1% rprogr, LP: +16 */
493 rcalnewcodelp = rcalcode + 16;
494 /* Correct RCAL code + 1 is -15 rprogr, 11: +10 */
495 rcalnewcode11 = rcalcode + 10;
496 /* Saturate if necessary */
497 if (rcalnewcodelp > 0x3f)
498 rcalnewcodelp = 0x3f;
499 if (rcalnewcode11 > 0x3f)
500 rcalnewcode11 = 0x3f;
501 /* REXT=1 BYP=1 RCAL_st1<5:0>=new rcal code */
502 tmp = 0x00f8 + rcalnewcodelp * 256;
503 /* Program into AFE_CAL_CONFIG_2 */
504 bcm_phy_write_misc(phydev, 0x0039, 0x0003, tmp);
505 /* AFE_BIAS_CONFIG_0 10BT bias code (Bias: E4) */
506 bcm_phy_write_misc(phydev, 0x0038, 0x0001, 0xe7e4);
507 /* invert adc clock output and 'adc refp ldo current To correct
508 * default
509 */
510 bcm_phy_write_misc(phydev, 0x003b, 0x0000, 0x8002);
511 /* 100BT stair case, high BW, 1G stair case, alternate encode */
512 bcm_phy_write_misc(phydev, 0x003c, 0x0003, 0xf882);
513 /* 1000BT DAC transition method per Erol, bits[32], DAC Shuffle
514 * sequence 1 + 10BT imp adjust bits
515 */
516 bcm_phy_write_misc(phydev, 0x003d, 0x0000, 0x3201);
517 /* Non-overlap fix */
518 bcm_phy_write_misc(phydev, 0x003a, 0x0002, 0x0c00);
519
520 /* pwdb override (rxconfig<5>) to turn on RX LDO indpendent of
521 * pwdb controls from DSP_TAP10
522 */
523 bcm_phy_write_misc(phydev, 0x003a, 0x0001, 0x0020);
524
525 /* Remove references to channel 2 and 3 */
526 bcm_phy_write_misc(phydev, 0x003b, 0x0002, 0x0000);
527 bcm_phy_write_misc(phydev, 0x003b, 0x0003, 0x0000);
528
529 /* Set cal_bypassb bit rxconfig<43> */
530 bcm_phy_write_misc(phydev, 0x003a, 0x0003, 0x0800);
531 udelay(2);
532
533 /* Revert pwdb_override (rxconfig<5>) to 0 so that the RX pwr
534 * is controlled by DSP.
535 */
536 bcm_phy_write_misc(phydev, 0x003a, 0x0001, 0x0000);
537
538 /* Drop LSB */
539 rcalnewcode11d2 = (rcalnewcode11 & 0xfffe) / 2;
540 tmp = bcm_phy_read_misc(phydev, 0x003d, 0x0001);
541 /* Clear bits [11:5] */
542 tmp &= ~0xfe0;
543 /* set txcfg_ch0<5>=1 (enable + set local rcal) */
544 tmp |= 0x0020 | (rcalnewcode11d2 * 64);
545 bcm_phy_write_misc(phydev, 0x003d, 0x0001, tmp);
546 bcm_phy_write_misc(phydev, 0x003d, 0x0002, tmp);
547
548 tmp = bcm_phy_read_misc(phydev, 0x003d, 0x0000);
549 /* set txcfg<45:44>=11 (enable Rextra + invert fullscaledetect)
550 */
551 tmp &= ~0x3000;
552 tmp |= 0x3000;
553 bcm_phy_write_misc(phydev, 0x003d, 0x0000, tmp);
554
555 return 0;
556}
557
558static int bcm7xxx_16nm_ephy_config_init(struct phy_device *phydev)
559{
560 int ret, val;
561
562 ret = bcm7xxx_16nm_ephy_afe_config(phydev);
563 if (ret)
564 return ret;
565
566 ret = bcm_phy_set_eee(phydev, true);
567 if (ret)
568 return ret;
569
570 ret = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR3);
571 if (ret < 0)
572 return ret;
573
574 val = ret;
575
576 /* Auto power down of DLL enabled,
577 * TXC/RXC disabled during auto power down.
578 */
579 val &= ~BCM54XX_SHD_SCR3_DLLAPD_DIS;
580 val |= BIT(8);
581
582 ret = bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR3, val);
583 if (ret < 0)
584 return ret;
585
586 return bcm_phy_enable_apd(phydev, true);
587}
588
589static int bcm7xxx_16nm_ephy_resume(struct phy_device *phydev)
590{
591 int ret;
592
593 /* Re-apply workarounds coming out suspend/resume */
594 ret = bcm7xxx_16nm_ephy_config_init(phydev);
595 if (ret)
596 return ret;
597
598 return genphy_config_aneg(phydev);
599}
600
601#define MII_BCM7XXX_REG_INVALID 0xff
602
603static u8 bcm7xxx_28nm_ephy_regnum_to_shd(u16 regnum)
604{
605 switch (regnum) {
606 case MDIO_CTRL1:
607 return MII_BCM7XXX_SHD_3_PCS_CTRL;
608 case MDIO_STAT1:
609 return MII_BCM7XXX_SHD_3_PCS_STATUS;
610 case MDIO_PCS_EEE_ABLE:
611 return MII_BCM7XXX_SHD_3_EEE_CAP;
612 case MDIO_AN_EEE_ADV:
613 return MII_BCM7XXX_SHD_3_AN_EEE_ADV;
614 case MDIO_AN_EEE_LPABLE:
615 return MII_BCM7XXX_SHD_3_EEE_LP;
616 case MDIO_PCS_EEE_WK_ERR:
617 return MII_BCM7XXX_SHD_3_EEE_WK_ERR;
618 default:
619 return MII_BCM7XXX_REG_INVALID;
620 }
621}
622
623static bool bcm7xxx_28nm_ephy_dev_valid(int devnum)
624{
625 return devnum == MDIO_MMD_AN || devnum == MDIO_MMD_PCS;
626}
627
628static int bcm7xxx_28nm_ephy_read_mmd(struct phy_device *phydev,
629 int devnum, u16 regnum)
630{
631 u8 shd = bcm7xxx_28nm_ephy_regnum_to_shd(regnum);
632 int ret;
633
634 if (!bcm7xxx_28nm_ephy_dev_valid(devnum) ||
635 shd == MII_BCM7XXX_REG_INVALID)
636 return -EOPNOTSUPP;
637
638 /* set shadow mode 2 */
639 ret = __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
640 MII_BCM7XXX_SHD_MODE_2, 0);
641 if (ret < 0)
642 return ret;
643
644 /* Access the desired shadow register address */
645 ret = __phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, shd);
646 if (ret < 0)
647 goto reset_shadow_mode;
648
649 ret = __phy_read(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT);
650
651reset_shadow_mode:
652 /* reset shadow mode 2 */
653 __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0,
654 MII_BCM7XXX_SHD_MODE_2);
655 return ret;
656}
657
658static int bcm7xxx_28nm_ephy_write_mmd(struct phy_device *phydev,
659 int devnum, u16 regnum, u16 val)
660{
661 u8 shd = bcm7xxx_28nm_ephy_regnum_to_shd(regnum);
662 int ret;
663
664 if (!bcm7xxx_28nm_ephy_dev_valid(devnum) ||
665 shd == MII_BCM7XXX_REG_INVALID)
666 return -EOPNOTSUPP;
667
668 /* set shadow mode 2 */
669 ret = __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
670 MII_BCM7XXX_SHD_MODE_2, 0);
671 if (ret < 0)
672 return ret;
673
674 /* Access the desired shadow register address */
675 ret = __phy_write(phydev, MII_BCM7XXX_SHD_2_ADDR_CTRL, shd);
676 if (ret < 0)
677 goto reset_shadow_mode;
678
679 /* Write the desired value in the shadow register */
680 __phy_write(phydev, MII_BCM7XXX_SHD_2_CTRL_STAT, val);
681
682reset_shadow_mode:
683 /* reset shadow mode 2 */
684 return __phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0,
685 MII_BCM7XXX_SHD_MODE_2);
686}
687
688static int bcm7xxx_28nm_ephy_resume(struct phy_device *phydev)
689{
690 int ret;
691
692 /* Re-apply workarounds coming out suspend/resume */
693 ret = bcm7xxx_28nm_ephy_config_init(phydev);
694 if (ret)
695 return ret;
696
697 return genphy_config_aneg(phydev);
698}
699
700static int bcm7xxx_config_init(struct phy_device *phydev)
701{
702 int ret;
703
704 /* Enable 64 clock MDIO */
705 phy_write(phydev, MII_BCM7XXX_AUX_MODE, MII_BCM7XXX_64CLK_MDIO);
706 phy_read(phydev, MII_BCM7XXX_AUX_MODE);
707
708 /* set shadow mode 2 */
709 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST,
710 MII_BCM7XXX_SHD_MODE_2, MII_BCM7XXX_SHD_MODE_2);
711 if (ret < 0)
712 return ret;
713
714 /* set iddq_clkbias */
715 phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0F00);
716 udelay(10);
717
718 /* reset iddq_clkbias */
719 phy_write(phydev, MII_BCM7XXX_100TX_DISC, 0x0C00);
720
721 phy_write(phydev, MII_BCM7XXX_100TX_FALSE_CAR, 0x7555);
722
723 /* reset shadow mode 2 */
724 ret = phy_set_clr_bits(phydev, MII_BCM7XXX_TEST, 0, MII_BCM7XXX_SHD_MODE_2);
725 if (ret < 0)
726 return ret;
727
728 return 0;
729}
730
731/* Workaround for putting the PHY in IDDQ mode, required
732 * for all BCM7XXX 40nm and 65nm PHYs
733 */
734static int bcm7xxx_suspend(struct phy_device *phydev)
735{
736 int ret;
737 static const struct bcm7xxx_regs {
738 int reg;
739 u16 value;
740 } bcm7xxx_suspend_cfg[] = {
741 { MII_BCM7XXX_TEST, 0x008b },
742 { MII_BCM7XXX_100TX_AUX_CTL, 0x01c0 },
743 { MII_BCM7XXX_100TX_DISC, 0x7000 },
744 { MII_BCM7XXX_TEST, 0x000f },
745 { MII_BCM7XXX_100TX_AUX_CTL, 0x20d0 },
746 { MII_BCM7XXX_TEST, 0x000b },
747 };
748 unsigned int i;
749
750 for (i = 0; i < ARRAY_SIZE(bcm7xxx_suspend_cfg); i++) {
751 ret = phy_write(phydev,
752 bcm7xxx_suspend_cfg[i].reg,
753 bcm7xxx_suspend_cfg[i].value);
754 if (ret)
755 return ret;
756 }
757
758 return 0;
759}
760
761static int bcm7xxx_28nm_get_tunable(struct phy_device *phydev,
762 struct ethtool_tunable *tuna,
763 void *data)
764{
765 switch (tuna->id) {
766 case ETHTOOL_PHY_DOWNSHIFT:
767 return bcm_phy_downshift_get(phydev, (u8 *)data);
768 default:
769 return -EOPNOTSUPP;
770 }
771}
772
773static int bcm7xxx_28nm_set_tunable(struct phy_device *phydev,
774 struct ethtool_tunable *tuna,
775 const void *data)
776{
777 u8 count = *(u8 *)data;
778 int ret;
779
780 switch (tuna->id) {
781 case ETHTOOL_PHY_DOWNSHIFT:
782 ret = bcm_phy_downshift_set(phydev, count);
783 break;
784 default:
785 return -EOPNOTSUPP;
786 }
787
788 if (ret)
789 return ret;
790
791 /* Disable EEE advertisement since this prevents the PHY
792 * from successfully linking up, trigger auto-negotiation restart
793 * to let the MAC decide what to do.
794 */
795 ret = bcm_phy_set_eee(phydev, count == DOWNSHIFT_DEV_DISABLE);
796 if (ret)
797 return ret;
798
799 return genphy_restart_aneg(phydev);
800}
801
802static void bcm7xxx_28nm_get_phy_stats(struct phy_device *phydev,
803 struct ethtool_stats *stats, u64 *data)
804{
805 struct bcm7xxx_phy_priv *priv = phydev->priv;
806
807 bcm_phy_get_stats(phydev, priv->stats, stats, data);
808}
809
810static int bcm7xxx_28nm_probe(struct phy_device *phydev)
811{
812 struct bcm7xxx_phy_priv *priv;
813 struct clk *clk;
814 int ret = 0;
815
816 priv = devm_kzalloc(&phydev->mdio.dev, sizeof(*priv), GFP_KERNEL);
817 if (!priv)
818 return -ENOMEM;
819
820 phydev->priv = priv;
821
822 priv->stats = devm_kcalloc(&phydev->mdio.dev,
823 bcm_phy_get_sset_count(phydev), sizeof(u64),
824 GFP_KERNEL);
825 if (!priv->stats)
826 return -ENOMEM;
827
828 clk = devm_clk_get_optional_enabled(&phydev->mdio.dev, NULL);
829 if (IS_ERR(clk))
830 return PTR_ERR(clk);
831
832 /* Dummy read to a register to workaround an issue upon reset where the
833 * internal inverter may not allow the first MDIO transaction to pass
834 * the MDIO management controller and make us return 0xffff for such
835 * reads. This is needed to ensure that any subsequent reads to the
836 * PHY will succeed.
837 */
838 phy_read(phydev, MII_BMSR);
839
840 return ret;
841}
842
843#define BCM7XXX_28NM_GPHY(_oui, _name) \
844{ \
845 .phy_id = (_oui), \
846 .phy_id_mask = 0xfffffff0, \
847 .name = _name, \
848 /* PHY_GBIT_FEATURES */ \
849 .flags = PHY_IS_INTERNAL, \
850 .config_init = bcm7xxx_28nm_config_init, \
851 .resume = bcm7xxx_28nm_resume, \
852 .get_tunable = bcm7xxx_28nm_get_tunable, \
853 .set_tunable = bcm7xxx_28nm_set_tunable, \
854 .get_sset_count = bcm_phy_get_sset_count, \
855 .get_strings = bcm_phy_get_strings, \
856 .get_stats = bcm7xxx_28nm_get_phy_stats, \
857 .probe = bcm7xxx_28nm_probe, \
858}
859
860#define BCM7XXX_28NM_EPHY(_oui, _name) \
861{ \
862 .phy_id = (_oui), \
863 .phy_id_mask = 0xfffffff0, \
864 .name = _name, \
865 /* PHY_BASIC_FEATURES */ \
866 .flags = PHY_IS_INTERNAL, \
867 .config_init = bcm7xxx_28nm_ephy_config_init, \
868 .resume = bcm7xxx_28nm_ephy_resume, \
869 .get_sset_count = bcm_phy_get_sset_count, \
870 .get_strings = bcm_phy_get_strings, \
871 .get_stats = bcm7xxx_28nm_get_phy_stats, \
872 .probe = bcm7xxx_28nm_probe, \
873 .read_mmd = bcm7xxx_28nm_ephy_read_mmd, \
874 .write_mmd = bcm7xxx_28nm_ephy_write_mmd, \
875}
876
877#define BCM7XXX_40NM_EPHY(_oui, _name) \
878{ \
879 .phy_id = (_oui), \
880 .phy_id_mask = 0xfffffff0, \
881 .name = _name, \
882 /* PHY_BASIC_FEATURES */ \
883 .flags = PHY_IS_INTERNAL, \
884 .soft_reset = genphy_soft_reset, \
885 .config_init = bcm7xxx_config_init, \
886 .suspend = bcm7xxx_suspend, \
887 .resume = bcm7xxx_config_init, \
888}
889
890#define BCM7XXX_16NM_EPHY(_oui, _name) \
891{ \
892 .phy_id = (_oui), \
893 .phy_id_mask = 0xfffffff0, \
894 .name = _name, \
895 /* PHY_BASIC_FEATURES */ \
896 .flags = PHY_IS_INTERNAL, \
897 .get_sset_count = bcm_phy_get_sset_count, \
898 .get_strings = bcm_phy_get_strings, \
899 .get_stats = bcm7xxx_28nm_get_phy_stats, \
900 .probe = bcm7xxx_28nm_probe, \
901 .config_init = bcm7xxx_16nm_ephy_config_init, \
902 .config_aneg = genphy_config_aneg, \
903 .read_status = genphy_read_status, \
904 .resume = bcm7xxx_16nm_ephy_resume, \
905}
906
907static struct phy_driver bcm7xxx_driver[] = {
908 BCM7XXX_28NM_EPHY(PHY_ID_BCM72113, "Broadcom BCM72113"),
909 BCM7XXX_28NM_EPHY(PHY_ID_BCM72116, "Broadcom BCM72116"),
910 BCM7XXX_16NM_EPHY(PHY_ID_BCM72165, "Broadcom BCM72165"),
911 BCM7XXX_28NM_GPHY(PHY_ID_BCM7250, "Broadcom BCM7250"),
912 BCM7XXX_28NM_EPHY(PHY_ID_BCM7255, "Broadcom BCM7255"),
913 BCM7XXX_28NM_EPHY(PHY_ID_BCM7260, "Broadcom BCM7260"),
914 BCM7XXX_28NM_EPHY(PHY_ID_BCM7268, "Broadcom BCM7268"),
915 BCM7XXX_28NM_EPHY(PHY_ID_BCM7271, "Broadcom BCM7271"),
916 BCM7XXX_28NM_GPHY(PHY_ID_BCM7278, "Broadcom BCM7278"),
917 BCM7XXX_28NM_GPHY(PHY_ID_BCM7364, "Broadcom BCM7364"),
918 BCM7XXX_28NM_GPHY(PHY_ID_BCM7366, "Broadcom BCM7366"),
919 BCM7XXX_16NM_EPHY(PHY_ID_BCM74165, "Broadcom BCM74165"),
920 BCM7XXX_28NM_GPHY(PHY_ID_BCM74371, "Broadcom BCM74371"),
921 BCM7XXX_28NM_GPHY(PHY_ID_BCM7439, "Broadcom BCM7439"),
922 BCM7XXX_28NM_GPHY(PHY_ID_BCM7439_2, "Broadcom BCM7439 (2)"),
923 BCM7XXX_28NM_GPHY(PHY_ID_BCM7445, "Broadcom BCM7445"),
924 BCM7XXX_40NM_EPHY(PHY_ID_BCM7346, "Broadcom BCM7346"),
925 BCM7XXX_40NM_EPHY(PHY_ID_BCM7362, "Broadcom BCM7362"),
926 BCM7XXX_40NM_EPHY(PHY_ID_BCM7425, "Broadcom BCM7425"),
927 BCM7XXX_40NM_EPHY(PHY_ID_BCM7429, "Broadcom BCM7429"),
928 BCM7XXX_40NM_EPHY(PHY_ID_BCM7435, "Broadcom BCM7435"),
929 BCM7XXX_16NM_EPHY(PHY_ID_BCM7712, "Broadcom BCM7712"),
930};
931
932static struct mdio_device_id __maybe_unused bcm7xxx_tbl[] = {
933 { PHY_ID_BCM72113, 0xfffffff0 },
934 { PHY_ID_BCM72116, 0xfffffff0, },
935 { PHY_ID_BCM72165, 0xfffffff0, },
936 { PHY_ID_BCM7250, 0xfffffff0, },
937 { PHY_ID_BCM7255, 0xfffffff0, },
938 { PHY_ID_BCM7260, 0xfffffff0, },
939 { PHY_ID_BCM7268, 0xfffffff0, },
940 { PHY_ID_BCM7271, 0xfffffff0, },
941 { PHY_ID_BCM7278, 0xfffffff0, },
942 { PHY_ID_BCM7364, 0xfffffff0, },
943 { PHY_ID_BCM7366, 0xfffffff0, },
944 { PHY_ID_BCM7346, 0xfffffff0, },
945 { PHY_ID_BCM7362, 0xfffffff0, },
946 { PHY_ID_BCM7425, 0xfffffff0, },
947 { PHY_ID_BCM7429, 0xfffffff0, },
948 { PHY_ID_BCM74371, 0xfffffff0, },
949 { PHY_ID_BCM7439, 0xfffffff0, },
950 { PHY_ID_BCM7435, 0xfffffff0, },
951 { PHY_ID_BCM7445, 0xfffffff0, },
952 { PHY_ID_BCM7712, 0xfffffff0, },
953 { }
954};
955
956module_phy_driver(bcm7xxx_driver);
957
958MODULE_DEVICE_TABLE(mdio, bcm7xxx_tbl);
959
960MODULE_DESCRIPTION("Broadcom BCM7xxx internal PHY driver");
961MODULE_LICENSE("GPL");
962MODULE_AUTHOR("Broadcom Corporation");