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1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Driver for Analog Devices Industrial Ethernet PHYs
4 *
5 * Copyright 2019 Analog Devices Inc.
6 */
7#include <linux/kernel.h>
8#include <linux/bitfield.h>
9#include <linux/delay.h>
10#include <linux/errno.h>
11#include <linux/ethtool_netlink.h>
12#include <linux/init.h>
13#include <linux/module.h>
14#include <linux/mii.h>
15#include <linux/phy.h>
16#include <linux/property.h>
17
18#define PHY_ID_ADIN1200 0x0283bc20
19#define PHY_ID_ADIN1300 0x0283bc30
20
21#define ADIN1300_MII_EXT_REG_PTR 0x0010
22#define ADIN1300_MII_EXT_REG_DATA 0x0011
23
24#define ADIN1300_PHY_CTRL1 0x0012
25#define ADIN1300_AUTO_MDI_EN BIT(10)
26#define ADIN1300_MAN_MDIX_EN BIT(9)
27#define ADIN1300_DIAG_CLK_EN BIT(2)
28
29#define ADIN1300_RX_ERR_CNT 0x0014
30
31#define ADIN1300_PHY_CTRL_STATUS2 0x0015
32#define ADIN1300_NRG_PD_EN BIT(3)
33#define ADIN1300_NRG_PD_TX_EN BIT(2)
34#define ADIN1300_NRG_PD_STATUS BIT(1)
35
36#define ADIN1300_PHY_CTRL2 0x0016
37#define ADIN1300_DOWNSPEED_AN_100_EN BIT(11)
38#define ADIN1300_DOWNSPEED_AN_10_EN BIT(10)
39#define ADIN1300_GROUP_MDIO_EN BIT(6)
40#define ADIN1300_DOWNSPEEDS_EN \
41 (ADIN1300_DOWNSPEED_AN_100_EN | ADIN1300_DOWNSPEED_AN_10_EN)
42
43#define ADIN1300_PHY_CTRL3 0x0017
44#define ADIN1300_LINKING_EN BIT(13)
45#define ADIN1300_DOWNSPEED_RETRIES_MSK GENMASK(12, 10)
46
47#define ADIN1300_INT_MASK_REG 0x0018
48#define ADIN1300_INT_MDIO_SYNC_EN BIT(9)
49#define ADIN1300_INT_ANEG_STAT_CHNG_EN BIT(8)
50#define ADIN1300_INT_ANEG_PAGE_RX_EN BIT(6)
51#define ADIN1300_INT_IDLE_ERR_CNT_EN BIT(5)
52#define ADIN1300_INT_MAC_FIFO_OU_EN BIT(4)
53#define ADIN1300_INT_RX_STAT_CHNG_EN BIT(3)
54#define ADIN1300_INT_LINK_STAT_CHNG_EN BIT(2)
55#define ADIN1300_INT_SPEED_CHNG_EN BIT(1)
56#define ADIN1300_INT_HW_IRQ_EN BIT(0)
57#define ADIN1300_INT_MASK_EN \
58 (ADIN1300_INT_LINK_STAT_CHNG_EN | ADIN1300_INT_HW_IRQ_EN)
59#define ADIN1300_INT_STATUS_REG 0x0019
60
61#define ADIN1300_PHY_STATUS1 0x001a
62#define ADIN1300_PAIR_01_SWAP BIT(11)
63
64/* EEE register addresses, accessible via Clause 22 access using
65 * ADIN1300_MII_EXT_REG_PTR & ADIN1300_MII_EXT_REG_DATA.
66 * The bit-fields are the same as specified by IEEE for EEE.
67 */
68#define ADIN1300_EEE_CAP_REG 0x8000
69#define ADIN1300_EEE_ADV_REG 0x8001
70#define ADIN1300_EEE_LPABLE_REG 0x8002
71#define ADIN1300_CLOCK_STOP_REG 0x9400
72#define ADIN1300_LPI_WAKE_ERR_CNT_REG 0xa000
73
74#define ADIN1300_CDIAG_RUN 0xba1b
75#define ADIN1300_CDIAG_RUN_EN BIT(0)
76
77/*
78 * The XSIM3/2/1 and XSHRT3/2/1 are actually relative.
79 * For CDIAG_DTLD_RSLTS(0) it's ADIN1300_CDIAG_RSLT_XSIM3/2/1
80 * For CDIAG_DTLD_RSLTS(1) it's ADIN1300_CDIAG_RSLT_XSIM3/2/0
81 * For CDIAG_DTLD_RSLTS(2) it's ADIN1300_CDIAG_RSLT_XSIM3/1/0
82 * For CDIAG_DTLD_RSLTS(3) it's ADIN1300_CDIAG_RSLT_XSIM2/1/0
83 */
84#define ADIN1300_CDIAG_DTLD_RSLTS(x) (0xba1d + (x))
85#define ADIN1300_CDIAG_RSLT_BUSY BIT(10)
86#define ADIN1300_CDIAG_RSLT_XSIM3 BIT(9)
87#define ADIN1300_CDIAG_RSLT_XSIM2 BIT(8)
88#define ADIN1300_CDIAG_RSLT_XSIM1 BIT(7)
89#define ADIN1300_CDIAG_RSLT_SIM BIT(6)
90#define ADIN1300_CDIAG_RSLT_XSHRT3 BIT(5)
91#define ADIN1300_CDIAG_RSLT_XSHRT2 BIT(4)
92#define ADIN1300_CDIAG_RSLT_XSHRT1 BIT(3)
93#define ADIN1300_CDIAG_RSLT_SHRT BIT(2)
94#define ADIN1300_CDIAG_RSLT_OPEN BIT(1)
95#define ADIN1300_CDIAG_RSLT_GOOD BIT(0)
96
97#define ADIN1300_CDIAG_FLT_DIST(x) (0xba21 + (x))
98
99#define ADIN1300_GE_SOFT_RESET_REG 0xff0c
100#define ADIN1300_GE_SOFT_RESET BIT(0)
101
102#define ADIN1300_GE_RGMII_CFG_REG 0xff23
103#define ADIN1300_GE_RGMII_RX_MSK GENMASK(8, 6)
104#define ADIN1300_GE_RGMII_RX_SEL(x) \
105 FIELD_PREP(ADIN1300_GE_RGMII_RX_MSK, x)
106#define ADIN1300_GE_RGMII_GTX_MSK GENMASK(5, 3)
107#define ADIN1300_GE_RGMII_GTX_SEL(x) \
108 FIELD_PREP(ADIN1300_GE_RGMII_GTX_MSK, x)
109#define ADIN1300_GE_RGMII_RXID_EN BIT(2)
110#define ADIN1300_GE_RGMII_TXID_EN BIT(1)
111#define ADIN1300_GE_RGMII_EN BIT(0)
112
113/* RGMII internal delay settings for rx and tx for ADIN1300 */
114#define ADIN1300_RGMII_1_60_NS 0x0001
115#define ADIN1300_RGMII_1_80_NS 0x0002
116#define ADIN1300_RGMII_2_00_NS 0x0000
117#define ADIN1300_RGMII_2_20_NS 0x0006
118#define ADIN1300_RGMII_2_40_NS 0x0007
119
120#define ADIN1300_GE_RMII_CFG_REG 0xff24
121#define ADIN1300_GE_RMII_FIFO_DEPTH_MSK GENMASK(6, 4)
122#define ADIN1300_GE_RMII_FIFO_DEPTH_SEL(x) \
123 FIELD_PREP(ADIN1300_GE_RMII_FIFO_DEPTH_MSK, x)
124#define ADIN1300_GE_RMII_EN BIT(0)
125
126/* RMII fifo depth values */
127#define ADIN1300_RMII_4_BITS 0x0000
128#define ADIN1300_RMII_8_BITS 0x0001
129#define ADIN1300_RMII_12_BITS 0x0002
130#define ADIN1300_RMII_16_BITS 0x0003
131#define ADIN1300_RMII_20_BITS 0x0004
132#define ADIN1300_RMII_24_BITS 0x0005
133
134/**
135 * struct adin_cfg_reg_map - map a config value to aregister value
136 * @cfg: value in device configuration
137 * @reg: value in the register
138 */
139struct adin_cfg_reg_map {
140 int cfg;
141 int reg;
142};
143
144static const struct adin_cfg_reg_map adin_rgmii_delays[] = {
145 { 1600, ADIN1300_RGMII_1_60_NS },
146 { 1800, ADIN1300_RGMII_1_80_NS },
147 { 2000, ADIN1300_RGMII_2_00_NS },
148 { 2200, ADIN1300_RGMII_2_20_NS },
149 { 2400, ADIN1300_RGMII_2_40_NS },
150 { },
151};
152
153static const struct adin_cfg_reg_map adin_rmii_fifo_depths[] = {
154 { 4, ADIN1300_RMII_4_BITS },
155 { 8, ADIN1300_RMII_8_BITS },
156 { 12, ADIN1300_RMII_12_BITS },
157 { 16, ADIN1300_RMII_16_BITS },
158 { 20, ADIN1300_RMII_20_BITS },
159 { 24, ADIN1300_RMII_24_BITS },
160 { },
161};
162
163/**
164 * struct adin_clause45_mmd_map - map to convert Clause 45 regs to Clause 22
165 * @devad: device address used in Clause 45 access
166 * @cl45_regnum: register address defined by Clause 45
167 * @adin_regnum: equivalent register address accessible via Clause 22
168 */
169struct adin_clause45_mmd_map {
170 int devad;
171 u16 cl45_regnum;
172 u16 adin_regnum;
173};
174
175static const struct adin_clause45_mmd_map adin_clause45_mmd_map[] = {
176 { MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE, ADIN1300_EEE_CAP_REG },
177 { MDIO_MMD_AN, MDIO_AN_EEE_LPABLE, ADIN1300_EEE_LPABLE_REG },
178 { MDIO_MMD_AN, MDIO_AN_EEE_ADV, ADIN1300_EEE_ADV_REG },
179 { MDIO_MMD_PCS, MDIO_CTRL1, ADIN1300_CLOCK_STOP_REG },
180 { MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR, ADIN1300_LPI_WAKE_ERR_CNT_REG },
181};
182
183struct adin_hw_stat {
184 const char *string;
185 u16 reg1;
186 u16 reg2;
187};
188
189static const struct adin_hw_stat adin_hw_stats[] = {
190 { "total_frames_checked_count", 0x940A, 0x940B }, /* hi + lo */
191 { "length_error_frames_count", 0x940C },
192 { "alignment_error_frames_count", 0x940D },
193 { "symbol_error_count", 0x940E },
194 { "oversized_frames_count", 0x940F },
195 { "undersized_frames_count", 0x9410 },
196 { "odd_nibble_frames_count", 0x9411 },
197 { "odd_preamble_packet_count", 0x9412 },
198 { "dribble_bits_frames_count", 0x9413 },
199 { "false_carrier_events_count", 0x9414 },
200};
201
202/**
203 * struct adin_priv - ADIN PHY driver private data
204 * @stats: statistic counters for the PHY
205 */
206struct adin_priv {
207 u64 stats[ARRAY_SIZE(adin_hw_stats)];
208};
209
210static int adin_lookup_reg_value(const struct adin_cfg_reg_map *tbl, int cfg)
211{
212 size_t i;
213
214 for (i = 0; tbl[i].cfg; i++) {
215 if (tbl[i].cfg == cfg)
216 return tbl[i].reg;
217 }
218
219 return -EINVAL;
220}
221
222static u32 adin_get_reg_value(struct phy_device *phydev,
223 const char *prop_name,
224 const struct adin_cfg_reg_map *tbl,
225 u32 dflt)
226{
227 struct device *dev = &phydev->mdio.dev;
228 u32 val;
229 int rc;
230
231 if (device_property_read_u32(dev, prop_name, &val))
232 return dflt;
233
234 rc = adin_lookup_reg_value(tbl, val);
235 if (rc < 0) {
236 phydev_warn(phydev,
237 "Unsupported value %u for %s using default (%u)\n",
238 val, prop_name, dflt);
239 return dflt;
240 }
241
242 return rc;
243}
244
245static int adin_config_rgmii_mode(struct phy_device *phydev)
246{
247 u32 val;
248 int reg;
249
250 if (!phy_interface_is_rgmii(phydev))
251 return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
252 ADIN1300_GE_RGMII_CFG_REG,
253 ADIN1300_GE_RGMII_EN);
254
255 reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_RGMII_CFG_REG);
256 if (reg < 0)
257 return reg;
258
259 reg |= ADIN1300_GE_RGMII_EN;
260
261 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
262 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
263 reg |= ADIN1300_GE_RGMII_RXID_EN;
264
265 val = adin_get_reg_value(phydev, "adi,rx-internal-delay-ps",
266 adin_rgmii_delays,
267 ADIN1300_RGMII_2_00_NS);
268 reg &= ~ADIN1300_GE_RGMII_RX_MSK;
269 reg |= ADIN1300_GE_RGMII_RX_SEL(val);
270 } else {
271 reg &= ~ADIN1300_GE_RGMII_RXID_EN;
272 }
273
274 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
275 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
276 reg |= ADIN1300_GE_RGMII_TXID_EN;
277
278 val = adin_get_reg_value(phydev, "adi,tx-internal-delay-ps",
279 adin_rgmii_delays,
280 ADIN1300_RGMII_2_00_NS);
281 reg &= ~ADIN1300_GE_RGMII_GTX_MSK;
282 reg |= ADIN1300_GE_RGMII_GTX_SEL(val);
283 } else {
284 reg &= ~ADIN1300_GE_RGMII_TXID_EN;
285 }
286
287 return phy_write_mmd(phydev, MDIO_MMD_VEND1,
288 ADIN1300_GE_RGMII_CFG_REG, reg);
289}
290
291static int adin_config_rmii_mode(struct phy_device *phydev)
292{
293 u32 val;
294 int reg;
295
296 if (phydev->interface != PHY_INTERFACE_MODE_RMII)
297 return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
298 ADIN1300_GE_RMII_CFG_REG,
299 ADIN1300_GE_RMII_EN);
300
301 reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_RMII_CFG_REG);
302 if (reg < 0)
303 return reg;
304
305 reg |= ADIN1300_GE_RMII_EN;
306
307 val = adin_get_reg_value(phydev, "adi,fifo-depth-bits",
308 adin_rmii_fifo_depths,
309 ADIN1300_RMII_8_BITS);
310
311 reg &= ~ADIN1300_GE_RMII_FIFO_DEPTH_MSK;
312 reg |= ADIN1300_GE_RMII_FIFO_DEPTH_SEL(val);
313
314 return phy_write_mmd(phydev, MDIO_MMD_VEND1,
315 ADIN1300_GE_RMII_CFG_REG, reg);
316}
317
318static int adin_get_downshift(struct phy_device *phydev, u8 *data)
319{
320 int val, cnt, enable;
321
322 val = phy_read(phydev, ADIN1300_PHY_CTRL2);
323 if (val < 0)
324 return val;
325
326 cnt = phy_read(phydev, ADIN1300_PHY_CTRL3);
327 if (cnt < 0)
328 return cnt;
329
330 enable = FIELD_GET(ADIN1300_DOWNSPEEDS_EN, val);
331 cnt = FIELD_GET(ADIN1300_DOWNSPEED_RETRIES_MSK, cnt);
332
333 *data = (enable && cnt) ? cnt : DOWNSHIFT_DEV_DISABLE;
334
335 return 0;
336}
337
338static int adin_set_downshift(struct phy_device *phydev, u8 cnt)
339{
340 u16 val;
341 int rc;
342
343 if (cnt == DOWNSHIFT_DEV_DISABLE)
344 return phy_clear_bits(phydev, ADIN1300_PHY_CTRL2,
345 ADIN1300_DOWNSPEEDS_EN);
346
347 if (cnt > 7)
348 return -E2BIG;
349
350 val = FIELD_PREP(ADIN1300_DOWNSPEED_RETRIES_MSK, cnt);
351
352 rc = phy_modify(phydev, ADIN1300_PHY_CTRL3,
353 ADIN1300_DOWNSPEED_RETRIES_MSK,
354 val);
355 if (rc < 0)
356 return rc;
357
358 return phy_set_bits(phydev, ADIN1300_PHY_CTRL2,
359 ADIN1300_DOWNSPEEDS_EN);
360}
361
362static int adin_get_edpd(struct phy_device *phydev, u16 *tx_interval)
363{
364 int val;
365
366 val = phy_read(phydev, ADIN1300_PHY_CTRL_STATUS2);
367 if (val < 0)
368 return val;
369
370 if (ADIN1300_NRG_PD_EN & val) {
371 if (val & ADIN1300_NRG_PD_TX_EN)
372 /* default is 1 second */
373 *tx_interval = ETHTOOL_PHY_EDPD_DFLT_TX_MSECS;
374 else
375 *tx_interval = ETHTOOL_PHY_EDPD_NO_TX;
376 } else {
377 *tx_interval = ETHTOOL_PHY_EDPD_DISABLE;
378 }
379
380 return 0;
381}
382
383static int adin_set_edpd(struct phy_device *phydev, u16 tx_interval)
384{
385 u16 val;
386
387 if (tx_interval == ETHTOOL_PHY_EDPD_DISABLE)
388 return phy_clear_bits(phydev, ADIN1300_PHY_CTRL_STATUS2,
389 (ADIN1300_NRG_PD_EN | ADIN1300_NRG_PD_TX_EN));
390
391 val = ADIN1300_NRG_PD_EN;
392
393 switch (tx_interval) {
394 case 1000: /* 1 second */
395 fallthrough;
396 case ETHTOOL_PHY_EDPD_DFLT_TX_MSECS:
397 val |= ADIN1300_NRG_PD_TX_EN;
398 fallthrough;
399 case ETHTOOL_PHY_EDPD_NO_TX:
400 break;
401 default:
402 return -EINVAL;
403 }
404
405 return phy_modify(phydev, ADIN1300_PHY_CTRL_STATUS2,
406 (ADIN1300_NRG_PD_EN | ADIN1300_NRG_PD_TX_EN),
407 val);
408}
409
410static int adin_get_tunable(struct phy_device *phydev,
411 struct ethtool_tunable *tuna, void *data)
412{
413 switch (tuna->id) {
414 case ETHTOOL_PHY_DOWNSHIFT:
415 return adin_get_downshift(phydev, data);
416 case ETHTOOL_PHY_EDPD:
417 return adin_get_edpd(phydev, data);
418 default:
419 return -EOPNOTSUPP;
420 }
421}
422
423static int adin_set_tunable(struct phy_device *phydev,
424 struct ethtool_tunable *tuna, const void *data)
425{
426 switch (tuna->id) {
427 case ETHTOOL_PHY_DOWNSHIFT:
428 return adin_set_downshift(phydev, *(const u8 *)data);
429 case ETHTOOL_PHY_EDPD:
430 return adin_set_edpd(phydev, *(const u16 *)data);
431 default:
432 return -EOPNOTSUPP;
433 }
434}
435
436static int adin_config_init(struct phy_device *phydev)
437{
438 int rc;
439
440 phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
441
442 rc = adin_config_rgmii_mode(phydev);
443 if (rc < 0)
444 return rc;
445
446 rc = adin_config_rmii_mode(phydev);
447 if (rc < 0)
448 return rc;
449
450 rc = adin_set_downshift(phydev, 4);
451 if (rc < 0)
452 return rc;
453
454 rc = adin_set_edpd(phydev, ETHTOOL_PHY_EDPD_DFLT_TX_MSECS);
455 if (rc < 0)
456 return rc;
457
458 phydev_dbg(phydev, "PHY is using mode '%s'\n",
459 phy_modes(phydev->interface));
460
461 return 0;
462}
463
464static int adin_phy_ack_intr(struct phy_device *phydev)
465{
466 /* Clear pending interrupts */
467 int rc = phy_read(phydev, ADIN1300_INT_STATUS_REG);
468
469 return rc < 0 ? rc : 0;
470}
471
472static int adin_phy_config_intr(struct phy_device *phydev)
473{
474 int err;
475
476 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
477 err = adin_phy_ack_intr(phydev);
478 if (err)
479 return err;
480
481 err = phy_set_bits(phydev, ADIN1300_INT_MASK_REG,
482 ADIN1300_INT_MASK_EN);
483 } else {
484 err = phy_clear_bits(phydev, ADIN1300_INT_MASK_REG,
485 ADIN1300_INT_MASK_EN);
486 if (err)
487 return err;
488
489 err = adin_phy_ack_intr(phydev);
490 }
491
492 return err;
493}
494
495static irqreturn_t adin_phy_handle_interrupt(struct phy_device *phydev)
496{
497 int irq_status;
498
499 irq_status = phy_read(phydev, ADIN1300_INT_STATUS_REG);
500 if (irq_status < 0) {
501 phy_error(phydev);
502 return IRQ_NONE;
503 }
504
505 if (!(irq_status & ADIN1300_INT_LINK_STAT_CHNG_EN))
506 return IRQ_NONE;
507
508 phy_trigger_machine(phydev);
509
510 return IRQ_HANDLED;
511}
512
513static int adin_cl45_to_adin_reg(struct phy_device *phydev, int devad,
514 u16 cl45_regnum)
515{
516 const struct adin_clause45_mmd_map *m;
517 int i;
518
519 if (devad == MDIO_MMD_VEND1)
520 return cl45_regnum;
521
522 for (i = 0; i < ARRAY_SIZE(adin_clause45_mmd_map); i++) {
523 m = &adin_clause45_mmd_map[i];
524 if (m->devad == devad && m->cl45_regnum == cl45_regnum)
525 return m->adin_regnum;
526 }
527
528 phydev_err(phydev,
529 "No translation available for devad: %d reg: %04x\n",
530 devad, cl45_regnum);
531
532 return -EINVAL;
533}
534
535static int adin_read_mmd(struct phy_device *phydev, int devad, u16 regnum)
536{
537 struct mii_bus *bus = phydev->mdio.bus;
538 int phy_addr = phydev->mdio.addr;
539 int adin_regnum;
540 int err;
541
542 adin_regnum = adin_cl45_to_adin_reg(phydev, devad, regnum);
543 if (adin_regnum < 0)
544 return adin_regnum;
545
546 err = __mdiobus_write(bus, phy_addr, ADIN1300_MII_EXT_REG_PTR,
547 adin_regnum);
548 if (err)
549 return err;
550
551 return __mdiobus_read(bus, phy_addr, ADIN1300_MII_EXT_REG_DATA);
552}
553
554static int adin_write_mmd(struct phy_device *phydev, int devad, u16 regnum,
555 u16 val)
556{
557 struct mii_bus *bus = phydev->mdio.bus;
558 int phy_addr = phydev->mdio.addr;
559 int adin_regnum;
560 int err;
561
562 adin_regnum = adin_cl45_to_adin_reg(phydev, devad, regnum);
563 if (adin_regnum < 0)
564 return adin_regnum;
565
566 err = __mdiobus_write(bus, phy_addr, ADIN1300_MII_EXT_REG_PTR,
567 adin_regnum);
568 if (err)
569 return err;
570
571 return __mdiobus_write(bus, phy_addr, ADIN1300_MII_EXT_REG_DATA, val);
572}
573
574static int adin_config_mdix(struct phy_device *phydev)
575{
576 bool auto_en, mdix_en;
577 int reg;
578
579 mdix_en = false;
580 auto_en = false;
581 switch (phydev->mdix_ctrl) {
582 case ETH_TP_MDI:
583 break;
584 case ETH_TP_MDI_X:
585 mdix_en = true;
586 break;
587 case ETH_TP_MDI_AUTO:
588 auto_en = true;
589 break;
590 default:
591 return -EINVAL;
592 }
593
594 reg = phy_read(phydev, ADIN1300_PHY_CTRL1);
595 if (reg < 0)
596 return reg;
597
598 if (mdix_en)
599 reg |= ADIN1300_MAN_MDIX_EN;
600 else
601 reg &= ~ADIN1300_MAN_MDIX_EN;
602
603 if (auto_en)
604 reg |= ADIN1300_AUTO_MDI_EN;
605 else
606 reg &= ~ADIN1300_AUTO_MDI_EN;
607
608 return phy_write(phydev, ADIN1300_PHY_CTRL1, reg);
609}
610
611static int adin_config_aneg(struct phy_device *phydev)
612{
613 int ret;
614
615 ret = phy_clear_bits(phydev, ADIN1300_PHY_CTRL1, ADIN1300_DIAG_CLK_EN);
616 if (ret < 0)
617 return ret;
618
619 ret = phy_set_bits(phydev, ADIN1300_PHY_CTRL3, ADIN1300_LINKING_EN);
620 if (ret < 0)
621 return ret;
622
623 ret = adin_config_mdix(phydev);
624 if (ret)
625 return ret;
626
627 return genphy_config_aneg(phydev);
628}
629
630static int adin_mdix_update(struct phy_device *phydev)
631{
632 bool auto_en, mdix_en;
633 bool swapped;
634 int reg;
635
636 reg = phy_read(phydev, ADIN1300_PHY_CTRL1);
637 if (reg < 0)
638 return reg;
639
640 auto_en = !!(reg & ADIN1300_AUTO_MDI_EN);
641 mdix_en = !!(reg & ADIN1300_MAN_MDIX_EN);
642
643 /* If MDI/MDIX is forced, just read it from the control reg */
644 if (!auto_en) {
645 if (mdix_en)
646 phydev->mdix = ETH_TP_MDI_X;
647 else
648 phydev->mdix = ETH_TP_MDI;
649 return 0;
650 }
651
652 /**
653 * Otherwise, we need to deduce it from the PHY status2 reg.
654 * When Auto-MDI is enabled, the ADIN1300_MAN_MDIX_EN bit implies
655 * a preference for MDIX when it is set.
656 */
657 reg = phy_read(phydev, ADIN1300_PHY_STATUS1);
658 if (reg < 0)
659 return reg;
660
661 swapped = !!(reg & ADIN1300_PAIR_01_SWAP);
662
663 if (mdix_en != swapped)
664 phydev->mdix = ETH_TP_MDI_X;
665 else
666 phydev->mdix = ETH_TP_MDI;
667
668 return 0;
669}
670
671static int adin_read_status(struct phy_device *phydev)
672{
673 int ret;
674
675 ret = adin_mdix_update(phydev);
676 if (ret < 0)
677 return ret;
678
679 return genphy_read_status(phydev);
680}
681
682static int adin_soft_reset(struct phy_device *phydev)
683{
684 int rc;
685
686 /* The reset bit is self-clearing, set it and wait */
687 rc = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
688 ADIN1300_GE_SOFT_RESET_REG,
689 ADIN1300_GE_SOFT_RESET);
690 if (rc < 0)
691 return rc;
692
693 msleep(20);
694
695 /* If we get a read error something may be wrong */
696 rc = phy_read_mmd(phydev, MDIO_MMD_VEND1,
697 ADIN1300_GE_SOFT_RESET_REG);
698
699 return rc < 0 ? rc : 0;
700}
701
702static int adin_get_sset_count(struct phy_device *phydev)
703{
704 return ARRAY_SIZE(adin_hw_stats);
705}
706
707static void adin_get_strings(struct phy_device *phydev, u8 *data)
708{
709 int i;
710
711 for (i = 0; i < ARRAY_SIZE(adin_hw_stats); i++) {
712 strlcpy(&data[i * ETH_GSTRING_LEN],
713 adin_hw_stats[i].string, ETH_GSTRING_LEN);
714 }
715}
716
717static int adin_read_mmd_stat_regs(struct phy_device *phydev,
718 const struct adin_hw_stat *stat,
719 u32 *val)
720{
721 int ret;
722
723 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, stat->reg1);
724 if (ret < 0)
725 return ret;
726
727 *val = (ret & 0xffff);
728
729 if (stat->reg2 == 0)
730 return 0;
731
732 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, stat->reg2);
733 if (ret < 0)
734 return ret;
735
736 *val <<= 16;
737 *val |= (ret & 0xffff);
738
739 return 0;
740}
741
742static u64 adin_get_stat(struct phy_device *phydev, int i)
743{
744 const struct adin_hw_stat *stat = &adin_hw_stats[i];
745 struct adin_priv *priv = phydev->priv;
746 u32 val;
747 int ret;
748
749 if (stat->reg1 > 0x1f) {
750 ret = adin_read_mmd_stat_regs(phydev, stat, &val);
751 if (ret < 0)
752 return (u64)(~0);
753 } else {
754 ret = phy_read(phydev, stat->reg1);
755 if (ret < 0)
756 return (u64)(~0);
757 val = (ret & 0xffff);
758 }
759
760 priv->stats[i] += val;
761
762 return priv->stats[i];
763}
764
765static void adin_get_stats(struct phy_device *phydev,
766 struct ethtool_stats *stats, u64 *data)
767{
768 int i, rc;
769
770 /* latch copies of all the frame-checker counters */
771 rc = phy_read(phydev, ADIN1300_RX_ERR_CNT);
772 if (rc < 0)
773 return;
774
775 for (i = 0; i < ARRAY_SIZE(adin_hw_stats); i++)
776 data[i] = adin_get_stat(phydev, i);
777}
778
779static int adin_probe(struct phy_device *phydev)
780{
781 struct device *dev = &phydev->mdio.dev;
782 struct adin_priv *priv;
783
784 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
785 if (!priv)
786 return -ENOMEM;
787
788 phydev->priv = priv;
789
790 return 0;
791}
792
793static int adin_cable_test_start(struct phy_device *phydev)
794{
795 int ret;
796
797 ret = phy_clear_bits(phydev, ADIN1300_PHY_CTRL3, ADIN1300_LINKING_EN);
798 if (ret < 0)
799 return ret;
800
801 ret = phy_clear_bits(phydev, ADIN1300_PHY_CTRL1, ADIN1300_DIAG_CLK_EN);
802 if (ret < 0)
803 return ret;
804
805 /* wait a bit for the clock to stabilize */
806 msleep(50);
807
808 return phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_CDIAG_RUN,
809 ADIN1300_CDIAG_RUN_EN);
810}
811
812static int adin_cable_test_report_trans(int result)
813{
814 int mask;
815
816 if (result & ADIN1300_CDIAG_RSLT_GOOD)
817 return ETHTOOL_A_CABLE_RESULT_CODE_OK;
818 if (result & ADIN1300_CDIAG_RSLT_OPEN)
819 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
820
821 /* short with other pairs */
822 mask = ADIN1300_CDIAG_RSLT_XSHRT3 |
823 ADIN1300_CDIAG_RSLT_XSHRT2 |
824 ADIN1300_CDIAG_RSLT_XSHRT1;
825 if (result & mask)
826 return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
827
828 if (result & ADIN1300_CDIAG_RSLT_SHRT)
829 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
830
831 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
832}
833
834static int adin_cable_test_report_pair(struct phy_device *phydev,
835 unsigned int pair)
836{
837 int fault_rslt;
838 int ret;
839
840 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1,
841 ADIN1300_CDIAG_DTLD_RSLTS(pair));
842 if (ret < 0)
843 return ret;
844
845 fault_rslt = adin_cable_test_report_trans(ret);
846
847 ret = ethnl_cable_test_result(phydev, pair, fault_rslt);
848 if (ret < 0)
849 return ret;
850
851 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1,
852 ADIN1300_CDIAG_FLT_DIST(pair));
853 if (ret < 0)
854 return ret;
855
856 switch (fault_rslt) {
857 case ETHTOOL_A_CABLE_RESULT_CODE_OPEN:
858 case ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT:
859 case ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT:
860 return ethnl_cable_test_fault_length(phydev, pair, ret * 100);
861 default:
862 return 0;
863 }
864}
865
866static int adin_cable_test_report(struct phy_device *phydev)
867{
868 unsigned int pair;
869 int ret;
870
871 for (pair = ETHTOOL_A_CABLE_PAIR_A; pair <= ETHTOOL_A_CABLE_PAIR_D; pair++) {
872 ret = adin_cable_test_report_pair(phydev, pair);
873 if (ret < 0)
874 return ret;
875 }
876
877 return 0;
878}
879
880static int adin_cable_test_get_status(struct phy_device *phydev,
881 bool *finished)
882{
883 int ret;
884
885 *finished = false;
886
887 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_CDIAG_RUN);
888 if (ret < 0)
889 return ret;
890
891 if (ret & ADIN1300_CDIAG_RUN_EN)
892 return 0;
893
894 *finished = true;
895
896 return adin_cable_test_report(phydev);
897}
898
899static struct phy_driver adin_driver[] = {
900 {
901 PHY_ID_MATCH_MODEL(PHY_ID_ADIN1200),
902 .name = "ADIN1200",
903 .flags = PHY_POLL_CABLE_TEST,
904 .probe = adin_probe,
905 .config_init = adin_config_init,
906 .soft_reset = adin_soft_reset,
907 .config_aneg = adin_config_aneg,
908 .read_status = adin_read_status,
909 .get_tunable = adin_get_tunable,
910 .set_tunable = adin_set_tunable,
911 .config_intr = adin_phy_config_intr,
912 .handle_interrupt = adin_phy_handle_interrupt,
913 .get_sset_count = adin_get_sset_count,
914 .get_strings = adin_get_strings,
915 .get_stats = adin_get_stats,
916 .resume = genphy_resume,
917 .suspend = genphy_suspend,
918 .read_mmd = adin_read_mmd,
919 .write_mmd = adin_write_mmd,
920 .cable_test_start = adin_cable_test_start,
921 .cable_test_get_status = adin_cable_test_get_status,
922 },
923 {
924 PHY_ID_MATCH_MODEL(PHY_ID_ADIN1300),
925 .name = "ADIN1300",
926 .flags = PHY_POLL_CABLE_TEST,
927 .probe = adin_probe,
928 .config_init = adin_config_init,
929 .soft_reset = adin_soft_reset,
930 .config_aneg = adin_config_aneg,
931 .read_status = adin_read_status,
932 .get_tunable = adin_get_tunable,
933 .set_tunable = adin_set_tunable,
934 .config_intr = adin_phy_config_intr,
935 .handle_interrupt = adin_phy_handle_interrupt,
936 .get_sset_count = adin_get_sset_count,
937 .get_strings = adin_get_strings,
938 .get_stats = adin_get_stats,
939 .resume = genphy_resume,
940 .suspend = genphy_suspend,
941 .read_mmd = adin_read_mmd,
942 .write_mmd = adin_write_mmd,
943 .cable_test_start = adin_cable_test_start,
944 .cable_test_get_status = adin_cable_test_get_status,
945 },
946};
947
948module_phy_driver(adin_driver);
949
950static struct mdio_device_id __maybe_unused adin_tbl[] = {
951 { PHY_ID_MATCH_MODEL(PHY_ID_ADIN1200) },
952 { PHY_ID_MATCH_MODEL(PHY_ID_ADIN1300) },
953 { }
954};
955
956MODULE_DEVICE_TABLE(mdio, adin_tbl);
957MODULE_DESCRIPTION("Analog Devices Industrial Ethernet PHY driver");
958MODULE_LICENSE("GPL");