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_CLK_CFG_REG 0xff1f
103 #define ADIN1300_GE_CLK_CFG_MASK GENMASK(5, 0)
104 #define ADIN1300_GE_CLK_CFG_RCVR_125 BIT(5)
105 #define ADIN1300_GE_CLK_CFG_FREE_125 BIT(4)
106 #define ADIN1300_GE_CLK_CFG_REF_EN BIT(3)
107 #define ADIN1300_GE_CLK_CFG_HRT_RCVR BIT(2)
108 #define ADIN1300_GE_CLK_CFG_HRT_FREE BIT(1)
109 #define ADIN1300_GE_CLK_CFG_25 BIT(0)
110
111 #define ADIN1300_GE_RGMII_CFG_REG 0xff23
112 #define ADIN1300_GE_RGMII_RX_MSK GENMASK(8, 6)
113 #define ADIN1300_GE_RGMII_RX_SEL(x) \
114 FIELD_PREP(ADIN1300_GE_RGMII_RX_MSK, x)
115 #define ADIN1300_GE_RGMII_GTX_MSK GENMASK(5, 3)
116 #define ADIN1300_GE_RGMII_GTX_SEL(x) \
117 FIELD_PREP(ADIN1300_GE_RGMII_GTX_MSK, x)
118 #define ADIN1300_GE_RGMII_RXID_EN BIT(2)
119 #define ADIN1300_GE_RGMII_TXID_EN BIT(1)
120 #define ADIN1300_GE_RGMII_EN BIT(0)
121
122 /* RGMII internal delay settings for rx and tx for ADIN1300 */
123 #define ADIN1300_RGMII_1_60_NS 0x0001
124 #define ADIN1300_RGMII_1_80_NS 0x0002
125 #define ADIN1300_RGMII_2_00_NS 0x0000
126 #define ADIN1300_RGMII_2_20_NS 0x0006
127 #define ADIN1300_RGMII_2_40_NS 0x0007
128
129 #define ADIN1300_GE_RMII_CFG_REG 0xff24
130 #define ADIN1300_GE_RMII_FIFO_DEPTH_MSK GENMASK(6, 4)
131 #define ADIN1300_GE_RMII_FIFO_DEPTH_SEL(x) \
132 FIELD_PREP(ADIN1300_GE_RMII_FIFO_DEPTH_MSK, x)
133 #define ADIN1300_GE_RMII_EN BIT(0)
134
135 /* RMII fifo depth values */
136 #define ADIN1300_RMII_4_BITS 0x0000
137 #define ADIN1300_RMII_8_BITS 0x0001
138 #define ADIN1300_RMII_12_BITS 0x0002
139 #define ADIN1300_RMII_16_BITS 0x0003
140 #define ADIN1300_RMII_20_BITS 0x0004
141 #define ADIN1300_RMII_24_BITS 0x0005
142
143 /**
144 * struct adin_cfg_reg_map - map a config value to aregister value
145 * @cfg: value in device configuration
146 * @reg: value in the register
147 */
148 struct adin_cfg_reg_map {
149 int cfg;
150 int reg;
151 };
152
153 static const struct adin_cfg_reg_map adin_rgmii_delays[] = {
154 { 1600, ADIN1300_RGMII_1_60_NS },
155 { 1800, ADIN1300_RGMII_1_80_NS },
156 { 2000, ADIN1300_RGMII_2_00_NS },
157 { 2200, ADIN1300_RGMII_2_20_NS },
158 { 2400, ADIN1300_RGMII_2_40_NS },
159 { },
160 };
161
162 static const struct adin_cfg_reg_map adin_rmii_fifo_depths[] = {
163 { 4, ADIN1300_RMII_4_BITS },
164 { 8, ADIN1300_RMII_8_BITS },
165 { 12, ADIN1300_RMII_12_BITS },
166 { 16, ADIN1300_RMII_16_BITS },
167 { 20, ADIN1300_RMII_20_BITS },
168 { 24, ADIN1300_RMII_24_BITS },
169 { },
170 };
171
172 /**
173 * struct adin_clause45_mmd_map - map to convert Clause 45 regs to Clause 22
174 * @devad: device address used in Clause 45 access
175 * @cl45_regnum: register address defined by Clause 45
176 * @adin_regnum: equivalent register address accessible via Clause 22
177 */
178 struct adin_clause45_mmd_map {
179 int devad;
180 u16 cl45_regnum;
181 u16 adin_regnum;
182 };
183
184 static const struct adin_clause45_mmd_map adin_clause45_mmd_map[] = {
185 { MDIO_MMD_PCS, MDIO_PCS_EEE_ABLE, ADIN1300_EEE_CAP_REG },
186 { MDIO_MMD_AN, MDIO_AN_EEE_LPABLE, ADIN1300_EEE_LPABLE_REG },
187 { MDIO_MMD_AN, MDIO_AN_EEE_ADV, ADIN1300_EEE_ADV_REG },
188 { MDIO_MMD_PCS, MDIO_CTRL1, ADIN1300_CLOCK_STOP_REG },
189 { MDIO_MMD_PCS, MDIO_PCS_EEE_WK_ERR, ADIN1300_LPI_WAKE_ERR_CNT_REG },
190 };
191
192 struct adin_hw_stat {
193 const char *string;
194 u16 reg1;
195 u16 reg2;
196 };
197
198 static const struct adin_hw_stat adin_hw_stats[] = {
199 { "total_frames_checked_count", 0x940A, 0x940B }, /* hi + lo */
200 { "length_error_frames_count", 0x940C },
201 { "alignment_error_frames_count", 0x940D },
202 { "symbol_error_count", 0x940E },
203 { "oversized_frames_count", 0x940F },
204 { "undersized_frames_count", 0x9410 },
205 { "odd_nibble_frames_count", 0x9411 },
206 { "odd_preamble_packet_count", 0x9412 },
207 { "dribble_bits_frames_count", 0x9413 },
208 { "false_carrier_events_count", 0x9414 },
209 };
210
211 /**
212 * struct adin_priv - ADIN PHY driver private data
213 * @stats: statistic counters for the PHY
214 */
215 struct adin_priv {
216 u64 stats[ARRAY_SIZE(adin_hw_stats)];
217 };
218
adin_lookup_reg_value(const struct adin_cfg_reg_map * tbl,int cfg)219 static int adin_lookup_reg_value(const struct adin_cfg_reg_map *tbl, int cfg)
220 {
221 size_t i;
222
223 for (i = 0; tbl[i].cfg; i++) {
224 if (tbl[i].cfg == cfg)
225 return tbl[i].reg;
226 }
227
228 return -EINVAL;
229 }
230
adin_get_reg_value(struct phy_device * phydev,const char * prop_name,const struct adin_cfg_reg_map * tbl,u32 dflt)231 static u32 adin_get_reg_value(struct phy_device *phydev,
232 const char *prop_name,
233 const struct adin_cfg_reg_map *tbl,
234 u32 dflt)
235 {
236 struct device *dev = &phydev->mdio.dev;
237 u32 val;
238 int rc;
239
240 if (device_property_read_u32(dev, prop_name, &val))
241 return dflt;
242
243 rc = adin_lookup_reg_value(tbl, val);
244 if (rc < 0) {
245 phydev_warn(phydev,
246 "Unsupported value %u for %s using default (%u)\n",
247 val, prop_name, dflt);
248 return dflt;
249 }
250
251 return rc;
252 }
253
adin_config_rgmii_mode(struct phy_device * phydev)254 static int adin_config_rgmii_mode(struct phy_device *phydev)
255 {
256 u32 val;
257 int reg;
258
259 if (!phy_interface_is_rgmii(phydev))
260 return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
261 ADIN1300_GE_RGMII_CFG_REG,
262 ADIN1300_GE_RGMII_EN);
263
264 reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_RGMII_CFG_REG);
265 if (reg < 0)
266 return reg;
267
268 reg |= ADIN1300_GE_RGMII_EN;
269
270 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
271 phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) {
272 reg |= ADIN1300_GE_RGMII_RXID_EN;
273
274 val = adin_get_reg_value(phydev, "adi,rx-internal-delay-ps",
275 adin_rgmii_delays,
276 ADIN1300_RGMII_2_00_NS);
277 reg &= ~ADIN1300_GE_RGMII_RX_MSK;
278 reg |= ADIN1300_GE_RGMII_RX_SEL(val);
279 } else {
280 reg &= ~ADIN1300_GE_RGMII_RXID_EN;
281 }
282
283 if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID ||
284 phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) {
285 reg |= ADIN1300_GE_RGMII_TXID_EN;
286
287 val = adin_get_reg_value(phydev, "adi,tx-internal-delay-ps",
288 adin_rgmii_delays,
289 ADIN1300_RGMII_2_00_NS);
290 reg &= ~ADIN1300_GE_RGMII_GTX_MSK;
291 reg |= ADIN1300_GE_RGMII_GTX_SEL(val);
292 } else {
293 reg &= ~ADIN1300_GE_RGMII_TXID_EN;
294 }
295
296 return phy_write_mmd(phydev, MDIO_MMD_VEND1,
297 ADIN1300_GE_RGMII_CFG_REG, reg);
298 }
299
adin_config_rmii_mode(struct phy_device * phydev)300 static int adin_config_rmii_mode(struct phy_device *phydev)
301 {
302 u32 val;
303 int reg;
304
305 if (phydev->interface != PHY_INTERFACE_MODE_RMII)
306 return phy_clear_bits_mmd(phydev, MDIO_MMD_VEND1,
307 ADIN1300_GE_RMII_CFG_REG,
308 ADIN1300_GE_RMII_EN);
309
310 reg = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_RMII_CFG_REG);
311 if (reg < 0)
312 return reg;
313
314 reg |= ADIN1300_GE_RMII_EN;
315
316 val = adin_get_reg_value(phydev, "adi,fifo-depth-bits",
317 adin_rmii_fifo_depths,
318 ADIN1300_RMII_8_BITS);
319
320 reg &= ~ADIN1300_GE_RMII_FIFO_DEPTH_MSK;
321 reg |= ADIN1300_GE_RMII_FIFO_DEPTH_SEL(val);
322
323 return phy_write_mmd(phydev, MDIO_MMD_VEND1,
324 ADIN1300_GE_RMII_CFG_REG, reg);
325 }
326
adin_get_downshift(struct phy_device * phydev,u8 * data)327 static int adin_get_downshift(struct phy_device *phydev, u8 *data)
328 {
329 int val, cnt, enable;
330
331 val = phy_read(phydev, ADIN1300_PHY_CTRL2);
332 if (val < 0)
333 return val;
334
335 cnt = phy_read(phydev, ADIN1300_PHY_CTRL3);
336 if (cnt < 0)
337 return cnt;
338
339 enable = FIELD_GET(ADIN1300_DOWNSPEEDS_EN, val);
340 cnt = FIELD_GET(ADIN1300_DOWNSPEED_RETRIES_MSK, cnt);
341
342 *data = (enable && cnt) ? cnt : DOWNSHIFT_DEV_DISABLE;
343
344 return 0;
345 }
346
adin_set_downshift(struct phy_device * phydev,u8 cnt)347 static int adin_set_downshift(struct phy_device *phydev, u8 cnt)
348 {
349 u16 val;
350 int rc;
351
352 if (cnt == DOWNSHIFT_DEV_DISABLE)
353 return phy_clear_bits(phydev, ADIN1300_PHY_CTRL2,
354 ADIN1300_DOWNSPEEDS_EN);
355
356 if (cnt > 7)
357 return -E2BIG;
358
359 val = FIELD_PREP(ADIN1300_DOWNSPEED_RETRIES_MSK, cnt);
360
361 rc = phy_modify(phydev, ADIN1300_PHY_CTRL3,
362 ADIN1300_DOWNSPEED_RETRIES_MSK,
363 val);
364 if (rc < 0)
365 return rc;
366
367 return phy_set_bits(phydev, ADIN1300_PHY_CTRL2,
368 ADIN1300_DOWNSPEEDS_EN);
369 }
370
adin_get_edpd(struct phy_device * phydev,u16 * tx_interval)371 static int adin_get_edpd(struct phy_device *phydev, u16 *tx_interval)
372 {
373 int val;
374
375 val = phy_read(phydev, ADIN1300_PHY_CTRL_STATUS2);
376 if (val < 0)
377 return val;
378
379 if (ADIN1300_NRG_PD_EN & val) {
380 if (val & ADIN1300_NRG_PD_TX_EN)
381 /* default is 1 second */
382 *tx_interval = ETHTOOL_PHY_EDPD_DFLT_TX_MSECS;
383 else
384 *tx_interval = ETHTOOL_PHY_EDPD_NO_TX;
385 } else {
386 *tx_interval = ETHTOOL_PHY_EDPD_DISABLE;
387 }
388
389 return 0;
390 }
391
adin_set_edpd(struct phy_device * phydev,u16 tx_interval)392 static int adin_set_edpd(struct phy_device *phydev, u16 tx_interval)
393 {
394 u16 val;
395
396 if (tx_interval == ETHTOOL_PHY_EDPD_DISABLE)
397 return phy_clear_bits(phydev, ADIN1300_PHY_CTRL_STATUS2,
398 (ADIN1300_NRG_PD_EN | ADIN1300_NRG_PD_TX_EN));
399
400 val = ADIN1300_NRG_PD_EN;
401
402 switch (tx_interval) {
403 case 1000: /* 1 second */
404 fallthrough;
405 case ETHTOOL_PHY_EDPD_DFLT_TX_MSECS:
406 val |= ADIN1300_NRG_PD_TX_EN;
407 fallthrough;
408 case ETHTOOL_PHY_EDPD_NO_TX:
409 break;
410 default:
411 return -EINVAL;
412 }
413
414 return phy_modify(phydev, ADIN1300_PHY_CTRL_STATUS2,
415 (ADIN1300_NRG_PD_EN | ADIN1300_NRG_PD_TX_EN),
416 val);
417 }
418
adin_get_tunable(struct phy_device * phydev,struct ethtool_tunable * tuna,void * data)419 static int adin_get_tunable(struct phy_device *phydev,
420 struct ethtool_tunable *tuna, void *data)
421 {
422 switch (tuna->id) {
423 case ETHTOOL_PHY_DOWNSHIFT:
424 return adin_get_downshift(phydev, data);
425 case ETHTOOL_PHY_EDPD:
426 return adin_get_edpd(phydev, data);
427 default:
428 return -EOPNOTSUPP;
429 }
430 }
431
adin_set_tunable(struct phy_device * phydev,struct ethtool_tunable * tuna,const void * data)432 static int adin_set_tunable(struct phy_device *phydev,
433 struct ethtool_tunable *tuna, const void *data)
434 {
435 switch (tuna->id) {
436 case ETHTOOL_PHY_DOWNSHIFT:
437 return adin_set_downshift(phydev, *(const u8 *)data);
438 case ETHTOOL_PHY_EDPD:
439 return adin_set_edpd(phydev, *(const u16 *)data);
440 default:
441 return -EOPNOTSUPP;
442 }
443 }
444
adin_config_clk_out(struct phy_device * phydev)445 static int adin_config_clk_out(struct phy_device *phydev)
446 {
447 struct device *dev = &phydev->mdio.dev;
448 const char *val = NULL;
449 u8 sel = 0;
450
451 device_property_read_string(dev, "adi,phy-output-clock", &val);
452 if (!val) {
453 /* property not present, do not enable GP_CLK pin */
454 } else if (strcmp(val, "25mhz-reference") == 0) {
455 sel |= ADIN1300_GE_CLK_CFG_25;
456 } else if (strcmp(val, "125mhz-free-running") == 0) {
457 sel |= ADIN1300_GE_CLK_CFG_FREE_125;
458 } else if (strcmp(val, "adaptive-free-running") == 0) {
459 sel |= ADIN1300_GE_CLK_CFG_HRT_FREE;
460 } else {
461 phydev_err(phydev, "invalid adi,phy-output-clock\n");
462 return -EINVAL;
463 }
464
465 if (device_property_read_bool(dev, "adi,phy-output-reference-clock"))
466 sel |= ADIN1300_GE_CLK_CFG_REF_EN;
467
468 return phy_modify_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_GE_CLK_CFG_REG,
469 ADIN1300_GE_CLK_CFG_MASK, sel);
470 }
471
adin_config_init(struct phy_device * phydev)472 static int adin_config_init(struct phy_device *phydev)
473 {
474 int rc;
475
476 phydev->mdix_ctrl = ETH_TP_MDI_AUTO;
477
478 rc = adin_config_rgmii_mode(phydev);
479 if (rc < 0)
480 return rc;
481
482 rc = adin_config_rmii_mode(phydev);
483 if (rc < 0)
484 return rc;
485
486 rc = adin_set_downshift(phydev, 4);
487 if (rc < 0)
488 return rc;
489
490 rc = adin_set_edpd(phydev, ETHTOOL_PHY_EDPD_DFLT_TX_MSECS);
491 if (rc < 0)
492 return rc;
493
494 rc = adin_config_clk_out(phydev);
495 if (rc < 0)
496 return rc;
497
498 phydev_dbg(phydev, "PHY is using mode '%s'\n",
499 phy_modes(phydev->interface));
500
501 return 0;
502 }
503
adin_phy_ack_intr(struct phy_device * phydev)504 static int adin_phy_ack_intr(struct phy_device *phydev)
505 {
506 /* Clear pending interrupts */
507 int rc = phy_read(phydev, ADIN1300_INT_STATUS_REG);
508
509 return rc < 0 ? rc : 0;
510 }
511
adin_phy_config_intr(struct phy_device * phydev)512 static int adin_phy_config_intr(struct phy_device *phydev)
513 {
514 int err;
515
516 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
517 err = adin_phy_ack_intr(phydev);
518 if (err)
519 return err;
520
521 err = phy_set_bits(phydev, ADIN1300_INT_MASK_REG,
522 ADIN1300_INT_MASK_EN);
523 } else {
524 err = phy_clear_bits(phydev, ADIN1300_INT_MASK_REG,
525 ADIN1300_INT_MASK_EN);
526 if (err)
527 return err;
528
529 err = adin_phy_ack_intr(phydev);
530 }
531
532 return err;
533 }
534
adin_phy_handle_interrupt(struct phy_device * phydev)535 static irqreturn_t adin_phy_handle_interrupt(struct phy_device *phydev)
536 {
537 int irq_status;
538
539 irq_status = phy_read(phydev, ADIN1300_INT_STATUS_REG);
540 if (irq_status < 0) {
541 phy_error(phydev);
542 return IRQ_NONE;
543 }
544
545 if (!(irq_status & ADIN1300_INT_LINK_STAT_CHNG_EN))
546 return IRQ_NONE;
547
548 phy_trigger_machine(phydev);
549
550 return IRQ_HANDLED;
551 }
552
adin_cl45_to_adin_reg(struct phy_device * phydev,int devad,u16 cl45_regnum)553 static int adin_cl45_to_adin_reg(struct phy_device *phydev, int devad,
554 u16 cl45_regnum)
555 {
556 const struct adin_clause45_mmd_map *m;
557 int i;
558
559 if (devad == MDIO_MMD_VEND1)
560 return cl45_regnum;
561
562 for (i = 0; i < ARRAY_SIZE(adin_clause45_mmd_map); i++) {
563 m = &adin_clause45_mmd_map[i];
564 if (m->devad == devad && m->cl45_regnum == cl45_regnum)
565 return m->adin_regnum;
566 }
567
568 phydev_err(phydev,
569 "No translation available for devad: %d reg: %04x\n",
570 devad, cl45_regnum);
571
572 return -EINVAL;
573 }
574
adin_read_mmd(struct phy_device * phydev,int devad,u16 regnum)575 static int adin_read_mmd(struct phy_device *phydev, int devad, u16 regnum)
576 {
577 struct mii_bus *bus = phydev->mdio.bus;
578 int phy_addr = phydev->mdio.addr;
579 int adin_regnum;
580 int err;
581
582 adin_regnum = adin_cl45_to_adin_reg(phydev, devad, regnum);
583 if (adin_regnum < 0)
584 return adin_regnum;
585
586 err = __mdiobus_write(bus, phy_addr, ADIN1300_MII_EXT_REG_PTR,
587 adin_regnum);
588 if (err)
589 return err;
590
591 return __mdiobus_read(bus, phy_addr, ADIN1300_MII_EXT_REG_DATA);
592 }
593
adin_write_mmd(struct phy_device * phydev,int devad,u16 regnum,u16 val)594 static int adin_write_mmd(struct phy_device *phydev, int devad, u16 regnum,
595 u16 val)
596 {
597 struct mii_bus *bus = phydev->mdio.bus;
598 int phy_addr = phydev->mdio.addr;
599 int adin_regnum;
600 int err;
601
602 adin_regnum = adin_cl45_to_adin_reg(phydev, devad, regnum);
603 if (adin_regnum < 0)
604 return adin_regnum;
605
606 err = __mdiobus_write(bus, phy_addr, ADIN1300_MII_EXT_REG_PTR,
607 adin_regnum);
608 if (err)
609 return err;
610
611 return __mdiobus_write(bus, phy_addr, ADIN1300_MII_EXT_REG_DATA, val);
612 }
613
adin_config_mdix(struct phy_device * phydev)614 static int adin_config_mdix(struct phy_device *phydev)
615 {
616 bool auto_en, mdix_en;
617 int reg;
618
619 mdix_en = false;
620 auto_en = false;
621 switch (phydev->mdix_ctrl) {
622 case ETH_TP_MDI:
623 break;
624 case ETH_TP_MDI_X:
625 mdix_en = true;
626 break;
627 case ETH_TP_MDI_AUTO:
628 auto_en = true;
629 break;
630 default:
631 return -EINVAL;
632 }
633
634 reg = phy_read(phydev, ADIN1300_PHY_CTRL1);
635 if (reg < 0)
636 return reg;
637
638 if (mdix_en)
639 reg |= ADIN1300_MAN_MDIX_EN;
640 else
641 reg &= ~ADIN1300_MAN_MDIX_EN;
642
643 if (auto_en)
644 reg |= ADIN1300_AUTO_MDI_EN;
645 else
646 reg &= ~ADIN1300_AUTO_MDI_EN;
647
648 return phy_write(phydev, ADIN1300_PHY_CTRL1, reg);
649 }
650
adin_config_aneg(struct phy_device * phydev)651 static int adin_config_aneg(struct phy_device *phydev)
652 {
653 int ret;
654
655 ret = phy_clear_bits(phydev, ADIN1300_PHY_CTRL1, ADIN1300_DIAG_CLK_EN);
656 if (ret < 0)
657 return ret;
658
659 ret = phy_set_bits(phydev, ADIN1300_PHY_CTRL3, ADIN1300_LINKING_EN);
660 if (ret < 0)
661 return ret;
662
663 ret = adin_config_mdix(phydev);
664 if (ret)
665 return ret;
666
667 return genphy_config_aneg(phydev);
668 }
669
adin_mdix_update(struct phy_device * phydev)670 static int adin_mdix_update(struct phy_device *phydev)
671 {
672 bool auto_en, mdix_en;
673 bool swapped;
674 int reg;
675
676 reg = phy_read(phydev, ADIN1300_PHY_CTRL1);
677 if (reg < 0)
678 return reg;
679
680 auto_en = !!(reg & ADIN1300_AUTO_MDI_EN);
681 mdix_en = !!(reg & ADIN1300_MAN_MDIX_EN);
682
683 /* If MDI/MDIX is forced, just read it from the control reg */
684 if (!auto_en) {
685 if (mdix_en)
686 phydev->mdix = ETH_TP_MDI_X;
687 else
688 phydev->mdix = ETH_TP_MDI;
689 return 0;
690 }
691
692 /**
693 * Otherwise, we need to deduce it from the PHY status2 reg.
694 * When Auto-MDI is enabled, the ADIN1300_MAN_MDIX_EN bit implies
695 * a preference for MDIX when it is set.
696 */
697 reg = phy_read(phydev, ADIN1300_PHY_STATUS1);
698 if (reg < 0)
699 return reg;
700
701 swapped = !!(reg & ADIN1300_PAIR_01_SWAP);
702
703 if (mdix_en != swapped)
704 phydev->mdix = ETH_TP_MDI_X;
705 else
706 phydev->mdix = ETH_TP_MDI;
707
708 return 0;
709 }
710
adin_read_status(struct phy_device * phydev)711 static int adin_read_status(struct phy_device *phydev)
712 {
713 int ret;
714
715 ret = adin_mdix_update(phydev);
716 if (ret < 0)
717 return ret;
718
719 return genphy_read_status(phydev);
720 }
721
adin_soft_reset(struct phy_device * phydev)722 static int adin_soft_reset(struct phy_device *phydev)
723 {
724 int rc;
725
726 /* The reset bit is self-clearing, set it and wait */
727 rc = phy_set_bits_mmd(phydev, MDIO_MMD_VEND1,
728 ADIN1300_GE_SOFT_RESET_REG,
729 ADIN1300_GE_SOFT_RESET);
730 if (rc < 0)
731 return rc;
732
733 msleep(20);
734
735 /* If we get a read error something may be wrong */
736 rc = phy_read_mmd(phydev, MDIO_MMD_VEND1,
737 ADIN1300_GE_SOFT_RESET_REG);
738
739 return rc < 0 ? rc : 0;
740 }
741
adin_get_sset_count(struct phy_device * phydev)742 static int adin_get_sset_count(struct phy_device *phydev)
743 {
744 return ARRAY_SIZE(adin_hw_stats);
745 }
746
adin_get_strings(struct phy_device * phydev,u8 * data)747 static void adin_get_strings(struct phy_device *phydev, u8 *data)
748 {
749 int i;
750
751 for (i = 0; i < ARRAY_SIZE(adin_hw_stats); i++) {
752 strscpy(&data[i * ETH_GSTRING_LEN],
753 adin_hw_stats[i].string, ETH_GSTRING_LEN);
754 }
755 }
756
adin_read_mmd_stat_regs(struct phy_device * phydev,const struct adin_hw_stat * stat,u32 * val)757 static int adin_read_mmd_stat_regs(struct phy_device *phydev,
758 const struct adin_hw_stat *stat,
759 u32 *val)
760 {
761 int ret;
762
763 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, stat->reg1);
764 if (ret < 0)
765 return ret;
766
767 *val = (ret & 0xffff);
768
769 if (stat->reg2 == 0)
770 return 0;
771
772 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, stat->reg2);
773 if (ret < 0)
774 return ret;
775
776 *val <<= 16;
777 *val |= (ret & 0xffff);
778
779 return 0;
780 }
781
adin_get_stat(struct phy_device * phydev,int i)782 static u64 adin_get_stat(struct phy_device *phydev, int i)
783 {
784 const struct adin_hw_stat *stat = &adin_hw_stats[i];
785 struct adin_priv *priv = phydev->priv;
786 u32 val;
787 int ret;
788
789 if (stat->reg1 > 0x1f) {
790 ret = adin_read_mmd_stat_regs(phydev, stat, &val);
791 if (ret < 0)
792 return (u64)(~0);
793 } else {
794 ret = phy_read(phydev, stat->reg1);
795 if (ret < 0)
796 return (u64)(~0);
797 val = (ret & 0xffff);
798 }
799
800 priv->stats[i] += val;
801
802 return priv->stats[i];
803 }
804
adin_get_stats(struct phy_device * phydev,struct ethtool_stats * stats,u64 * data)805 static void adin_get_stats(struct phy_device *phydev,
806 struct ethtool_stats *stats, u64 *data)
807 {
808 int i, rc;
809
810 /* latch copies of all the frame-checker counters */
811 rc = phy_read(phydev, ADIN1300_RX_ERR_CNT);
812 if (rc < 0)
813 return;
814
815 for (i = 0; i < ARRAY_SIZE(adin_hw_stats); i++)
816 data[i] = adin_get_stat(phydev, i);
817 }
818
adin_probe(struct phy_device * phydev)819 static int adin_probe(struct phy_device *phydev)
820 {
821 struct device *dev = &phydev->mdio.dev;
822 struct adin_priv *priv;
823
824 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
825 if (!priv)
826 return -ENOMEM;
827
828 phydev->priv = priv;
829
830 return 0;
831 }
832
adin_cable_test_start(struct phy_device * phydev)833 static int adin_cable_test_start(struct phy_device *phydev)
834 {
835 int ret;
836
837 ret = phy_clear_bits(phydev, ADIN1300_PHY_CTRL3, ADIN1300_LINKING_EN);
838 if (ret < 0)
839 return ret;
840
841 ret = phy_clear_bits(phydev, ADIN1300_PHY_CTRL1, ADIN1300_DIAG_CLK_EN);
842 if (ret < 0)
843 return ret;
844
845 /* wait a bit for the clock to stabilize */
846 msleep(50);
847
848 return phy_set_bits_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_CDIAG_RUN,
849 ADIN1300_CDIAG_RUN_EN);
850 }
851
adin_cable_test_report_trans(int result)852 static int adin_cable_test_report_trans(int result)
853 {
854 int mask;
855
856 if (result & ADIN1300_CDIAG_RSLT_GOOD)
857 return ETHTOOL_A_CABLE_RESULT_CODE_OK;
858 if (result & ADIN1300_CDIAG_RSLT_OPEN)
859 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
860
861 /* short with other pairs */
862 mask = ADIN1300_CDIAG_RSLT_XSHRT3 |
863 ADIN1300_CDIAG_RSLT_XSHRT2 |
864 ADIN1300_CDIAG_RSLT_XSHRT1;
865 if (result & mask)
866 return ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT;
867
868 if (result & ADIN1300_CDIAG_RSLT_SHRT)
869 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
870
871 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
872 }
873
adin_cable_test_report_pair(struct phy_device * phydev,unsigned int pair)874 static int adin_cable_test_report_pair(struct phy_device *phydev,
875 unsigned int pair)
876 {
877 int fault_rslt;
878 int ret;
879
880 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1,
881 ADIN1300_CDIAG_DTLD_RSLTS(pair));
882 if (ret < 0)
883 return ret;
884
885 fault_rslt = adin_cable_test_report_trans(ret);
886
887 ret = ethnl_cable_test_result(phydev, pair, fault_rslt);
888 if (ret < 0)
889 return ret;
890
891 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1,
892 ADIN1300_CDIAG_FLT_DIST(pair));
893 if (ret < 0)
894 return ret;
895
896 switch (fault_rslt) {
897 case ETHTOOL_A_CABLE_RESULT_CODE_OPEN:
898 case ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT:
899 case ETHTOOL_A_CABLE_RESULT_CODE_CROSS_SHORT:
900 return ethnl_cable_test_fault_length(phydev, pair, ret * 100);
901 default:
902 return 0;
903 }
904 }
905
adin_cable_test_report(struct phy_device * phydev)906 static int adin_cable_test_report(struct phy_device *phydev)
907 {
908 unsigned int pair;
909 int ret;
910
911 for (pair = ETHTOOL_A_CABLE_PAIR_A; pair <= ETHTOOL_A_CABLE_PAIR_D; pair++) {
912 ret = adin_cable_test_report_pair(phydev, pair);
913 if (ret < 0)
914 return ret;
915 }
916
917 return 0;
918 }
919
adin_cable_test_get_status(struct phy_device * phydev,bool * finished)920 static int adin_cable_test_get_status(struct phy_device *phydev,
921 bool *finished)
922 {
923 int ret;
924
925 *finished = false;
926
927 ret = phy_read_mmd(phydev, MDIO_MMD_VEND1, ADIN1300_CDIAG_RUN);
928 if (ret < 0)
929 return ret;
930
931 if (ret & ADIN1300_CDIAG_RUN_EN)
932 return 0;
933
934 *finished = true;
935
936 return adin_cable_test_report(phydev);
937 }
938
939 static struct phy_driver adin_driver[] = {
940 {
941 PHY_ID_MATCH_MODEL(PHY_ID_ADIN1200),
942 .name = "ADIN1200",
943 .flags = PHY_POLL_CABLE_TEST,
944 .probe = adin_probe,
945 .config_init = adin_config_init,
946 .soft_reset = adin_soft_reset,
947 .config_aneg = adin_config_aneg,
948 .read_status = adin_read_status,
949 .get_tunable = adin_get_tunable,
950 .set_tunable = adin_set_tunable,
951 .config_intr = adin_phy_config_intr,
952 .handle_interrupt = adin_phy_handle_interrupt,
953 .get_sset_count = adin_get_sset_count,
954 .get_strings = adin_get_strings,
955 .get_stats = adin_get_stats,
956 .resume = genphy_resume,
957 .suspend = genphy_suspend,
958 .read_mmd = adin_read_mmd,
959 .write_mmd = adin_write_mmd,
960 .cable_test_start = adin_cable_test_start,
961 .cable_test_get_status = adin_cable_test_get_status,
962 },
963 {
964 PHY_ID_MATCH_MODEL(PHY_ID_ADIN1300),
965 .name = "ADIN1300",
966 .flags = PHY_POLL_CABLE_TEST,
967 .probe = adin_probe,
968 .config_init = adin_config_init,
969 .soft_reset = adin_soft_reset,
970 .config_aneg = adin_config_aneg,
971 .read_status = adin_read_status,
972 .get_tunable = adin_get_tunable,
973 .set_tunable = adin_set_tunable,
974 .config_intr = adin_phy_config_intr,
975 .handle_interrupt = adin_phy_handle_interrupt,
976 .get_sset_count = adin_get_sset_count,
977 .get_strings = adin_get_strings,
978 .get_stats = adin_get_stats,
979 .resume = genphy_resume,
980 .suspend = genphy_suspend,
981 .read_mmd = adin_read_mmd,
982 .write_mmd = adin_write_mmd,
983 .cable_test_start = adin_cable_test_start,
984 .cable_test_get_status = adin_cable_test_get_status,
985 },
986 };
987
988 module_phy_driver(adin_driver);
989
990 static struct mdio_device_id __maybe_unused adin_tbl[] = {
991 { PHY_ID_MATCH_MODEL(PHY_ID_ADIN1200) },
992 { PHY_ID_MATCH_MODEL(PHY_ID_ADIN1300) },
993 { }
994 };
995
996 MODULE_DEVICE_TABLE(mdio, adin_tbl);
997 MODULE_DESCRIPTION("Analog Devices Industrial Ethernet PHY driver");
998 MODULE_LICENSE("GPL");
999
