1 // SPDX-License-Identifier: GPL-2.0
2 /* NXP TJA1100 BroadRReach PHY driver
3 *
4 * Copyright (C) 2018 Marek Vasut <marex@denx.de>
5 */
6 #include <linux/delay.h>
7 #include <linux/ethtool.h>
8 #include <linux/ethtool_netlink.h>
9 #include <linux/kernel.h>
10 #include <linux/mdio.h>
11 #include <linux/mii.h>
12 #include <linux/module.h>
13 #include <linux/of.h>
14 #include <linux/phy.h>
15 #include <linux/hwmon.h>
16 #include <linux/bitfield.h>
17 #include <linux/of_mdio.h>
18 #include <linux/of_irq.h>
19
20 #define PHY_ID_MASK 0xfffffff0
21 #define PHY_ID_TJA1100 0x0180dc40
22 #define PHY_ID_TJA1101 0x0180dd00
23 #define PHY_ID_TJA1102 0x0180dc80
24
25 #define MII_ECTRL 17
26 #define MII_ECTRL_LINK_CONTROL BIT(15)
27 #define MII_ECTRL_POWER_MODE_MASK GENMASK(14, 11)
28 #define MII_ECTRL_POWER_MODE_NO_CHANGE (0x0 << 11)
29 #define MII_ECTRL_POWER_MODE_NORMAL (0x3 << 11)
30 #define MII_ECTRL_POWER_MODE_STANDBY (0xc << 11)
31 #define MII_ECTRL_CABLE_TEST BIT(5)
32 #define MII_ECTRL_CONFIG_EN BIT(2)
33 #define MII_ECTRL_WAKE_REQUEST BIT(0)
34
35 #define MII_CFG1 18
36 #define MII_CFG1_MASTER_SLAVE BIT(15)
37 #define MII_CFG1_AUTO_OP BIT(14)
38 #define MII_CFG1_INTERFACE_MODE_MASK GENMASK(9, 8)
39 #define MII_CFG1_MII_MODE (0x0 << 8)
40 #define MII_CFG1_RMII_MODE_REFCLK_IN BIT(8)
41 #define MII_CFG1_RMII_MODE_REFCLK_OUT BIT(9)
42 #define MII_CFG1_REVMII_MODE GENMASK(9, 8)
43 #define MII_CFG1_SLEEP_CONFIRM BIT(6)
44 #define MII_CFG1_LED_MODE_MASK GENMASK(5, 4)
45 #define MII_CFG1_LED_MODE_LINKUP 0
46 #define MII_CFG1_LED_ENABLE BIT(3)
47
48 #define MII_CFG2 19
49 #define MII_CFG2_SLEEP_REQUEST_TO GENMASK(1, 0)
50 #define MII_CFG2_SLEEP_REQUEST_TO_16MS 0x3
51
52 #define MII_INTSRC 21
53 #define MII_INTSRC_LINK_FAIL BIT(10)
54 #define MII_INTSRC_LINK_UP BIT(9)
55 #define MII_INTSRC_MASK (MII_INTSRC_LINK_FAIL | MII_INTSRC_LINK_UP)
56 #define MII_INTSRC_UV_ERR BIT(3)
57 #define MII_INTSRC_TEMP_ERR BIT(1)
58
59 #define MII_INTEN 22
60 #define MII_INTEN_LINK_FAIL BIT(10)
61 #define MII_INTEN_LINK_UP BIT(9)
62 #define MII_INTEN_UV_ERR BIT(3)
63 #define MII_INTEN_TEMP_ERR BIT(1)
64
65 #define MII_COMMSTAT 23
66 #define MII_COMMSTAT_LINK_UP BIT(15)
67 #define MII_COMMSTAT_SQI_STATE GENMASK(7, 5)
68 #define MII_COMMSTAT_SQI_MAX 7
69
70 #define MII_GENSTAT 24
71 #define MII_GENSTAT_PLL_LOCKED BIT(14)
72
73 #define MII_EXTSTAT 25
74 #define MII_EXTSTAT_SHORT_DETECT BIT(8)
75 #define MII_EXTSTAT_OPEN_DETECT BIT(7)
76 #define MII_EXTSTAT_POLARITY_DETECT BIT(6)
77
78 #define MII_COMMCFG 27
79 #define MII_COMMCFG_AUTO_OP BIT(15)
80
81 /* Configure REF_CLK as input in RMII mode */
82 #define TJA110X_RMII_MODE_REFCLK_IN BIT(0)
83
84 struct tja11xx_priv {
85 char *hwmon_name;
86 struct device *hwmon_dev;
87 struct phy_device *phydev;
88 struct work_struct phy_register_work;
89 u32 flags;
90 };
91
92 struct tja11xx_phy_stats {
93 const char *string;
94 u8 reg;
95 u8 off;
96 u16 mask;
97 };
98
99 static struct tja11xx_phy_stats tja11xx_hw_stats[] = {
100 { "phy_symbol_error_count", 20, 0, GENMASK(15, 0) },
101 { "phy_polarity_detect", 25, 6, BIT(6) },
102 { "phy_open_detect", 25, 7, BIT(7) },
103 { "phy_short_detect", 25, 8, BIT(8) },
104 { "phy_rem_rcvr_count", 26, 0, GENMASK(7, 0) },
105 { "phy_loc_rcvr_count", 26, 8, GENMASK(15, 8) },
106 };
107
tja11xx_check(struct phy_device * phydev,u8 reg,u16 mask,u16 set)108 static int tja11xx_check(struct phy_device *phydev, u8 reg, u16 mask, u16 set)
109 {
110 int val;
111
112 return phy_read_poll_timeout(phydev, reg, val, (val & mask) == set,
113 150, 30000, false);
114 }
115
phy_modify_check(struct phy_device * phydev,u8 reg,u16 mask,u16 set)116 static int phy_modify_check(struct phy_device *phydev, u8 reg,
117 u16 mask, u16 set)
118 {
119 int ret;
120
121 ret = phy_modify(phydev, reg, mask, set);
122 if (ret)
123 return ret;
124
125 return tja11xx_check(phydev, reg, mask, set);
126 }
127
tja11xx_enable_reg_write(struct phy_device * phydev)128 static int tja11xx_enable_reg_write(struct phy_device *phydev)
129 {
130 return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_CONFIG_EN);
131 }
132
tja11xx_enable_link_control(struct phy_device * phydev)133 static int tja11xx_enable_link_control(struct phy_device *phydev)
134 {
135 return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL);
136 }
137
tja11xx_disable_link_control(struct phy_device * phydev)138 static int tja11xx_disable_link_control(struct phy_device *phydev)
139 {
140 return phy_clear_bits(phydev, MII_ECTRL, MII_ECTRL_LINK_CONTROL);
141 }
142
tja11xx_wakeup(struct phy_device * phydev)143 static int tja11xx_wakeup(struct phy_device *phydev)
144 {
145 int ret;
146
147 ret = phy_read(phydev, MII_ECTRL);
148 if (ret < 0)
149 return ret;
150
151 switch (ret & MII_ECTRL_POWER_MODE_MASK) {
152 case MII_ECTRL_POWER_MODE_NO_CHANGE:
153 break;
154 case MII_ECTRL_POWER_MODE_NORMAL:
155 ret = phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_WAKE_REQUEST);
156 if (ret)
157 return ret;
158
159 ret = phy_clear_bits(phydev, MII_ECTRL, MII_ECTRL_WAKE_REQUEST);
160 if (ret)
161 return ret;
162 break;
163 case MII_ECTRL_POWER_MODE_STANDBY:
164 ret = phy_modify_check(phydev, MII_ECTRL,
165 MII_ECTRL_POWER_MODE_MASK,
166 MII_ECTRL_POWER_MODE_STANDBY);
167 if (ret)
168 return ret;
169
170 ret = phy_modify(phydev, MII_ECTRL, MII_ECTRL_POWER_MODE_MASK,
171 MII_ECTRL_POWER_MODE_NORMAL);
172 if (ret)
173 return ret;
174
175 ret = phy_modify_check(phydev, MII_GENSTAT,
176 MII_GENSTAT_PLL_LOCKED,
177 MII_GENSTAT_PLL_LOCKED);
178 if (ret)
179 return ret;
180
181 return tja11xx_enable_link_control(phydev);
182 default:
183 break;
184 }
185
186 return 0;
187 }
188
tja11xx_soft_reset(struct phy_device * phydev)189 static int tja11xx_soft_reset(struct phy_device *phydev)
190 {
191 int ret;
192
193 ret = tja11xx_enable_reg_write(phydev);
194 if (ret)
195 return ret;
196
197 return genphy_soft_reset(phydev);
198 }
199
tja11xx_config_aneg_cable_test(struct phy_device * phydev)200 static int tja11xx_config_aneg_cable_test(struct phy_device *phydev)
201 {
202 bool finished = false;
203 int ret;
204
205 if (phydev->link)
206 return 0;
207
208 if (!phydev->drv->cable_test_start ||
209 !phydev->drv->cable_test_get_status)
210 return 0;
211
212 ret = ethnl_cable_test_alloc(phydev, ETHTOOL_MSG_CABLE_TEST_NTF);
213 if (ret)
214 return ret;
215
216 ret = phydev->drv->cable_test_start(phydev);
217 if (ret)
218 return ret;
219
220 /* According to the documentation this test takes 100 usec */
221 usleep_range(100, 200);
222
223 ret = phydev->drv->cable_test_get_status(phydev, &finished);
224 if (ret)
225 return ret;
226
227 if (finished)
228 ethnl_cable_test_finished(phydev);
229
230 return 0;
231 }
232
tja11xx_config_aneg(struct phy_device * phydev)233 static int tja11xx_config_aneg(struct phy_device *phydev)
234 {
235 int ret, changed = 0;
236 u16 ctl = 0;
237
238 switch (phydev->master_slave_set) {
239 case MASTER_SLAVE_CFG_MASTER_FORCE:
240 ctl |= MII_CFG1_MASTER_SLAVE;
241 break;
242 case MASTER_SLAVE_CFG_SLAVE_FORCE:
243 break;
244 case MASTER_SLAVE_CFG_UNKNOWN:
245 case MASTER_SLAVE_CFG_UNSUPPORTED:
246 goto do_test;
247 default:
248 phydev_warn(phydev, "Unsupported Master/Slave mode\n");
249 return -ENOTSUPP;
250 }
251
252 changed = phy_modify_changed(phydev, MII_CFG1, MII_CFG1_MASTER_SLAVE, ctl);
253 if (changed < 0)
254 return changed;
255
256 do_test:
257 ret = tja11xx_config_aneg_cable_test(phydev);
258 if (ret)
259 return ret;
260
261 return __genphy_config_aneg(phydev, changed);
262 }
263
tja11xx_get_interface_mode(struct phy_device * phydev)264 static int tja11xx_get_interface_mode(struct phy_device *phydev)
265 {
266 struct tja11xx_priv *priv = phydev->priv;
267 int mii_mode;
268
269 switch (phydev->interface) {
270 case PHY_INTERFACE_MODE_MII:
271 mii_mode = MII_CFG1_MII_MODE;
272 break;
273 case PHY_INTERFACE_MODE_REVMII:
274 mii_mode = MII_CFG1_REVMII_MODE;
275 break;
276 case PHY_INTERFACE_MODE_RMII:
277 if (priv->flags & TJA110X_RMII_MODE_REFCLK_IN)
278 mii_mode = MII_CFG1_RMII_MODE_REFCLK_IN;
279 else
280 mii_mode = MII_CFG1_RMII_MODE_REFCLK_OUT;
281 break;
282 default:
283 return -EINVAL;
284 }
285
286 return mii_mode;
287 }
288
tja11xx_config_init(struct phy_device * phydev)289 static int tja11xx_config_init(struct phy_device *phydev)
290 {
291 u16 reg_mask, reg_val;
292 int ret;
293
294 ret = tja11xx_enable_reg_write(phydev);
295 if (ret)
296 return ret;
297
298 phydev->autoneg = AUTONEG_DISABLE;
299 phydev->speed = SPEED_100;
300 phydev->duplex = DUPLEX_FULL;
301
302 switch (phydev->phy_id & PHY_ID_MASK) {
303 case PHY_ID_TJA1100:
304 reg_mask = MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_MASK |
305 MII_CFG1_LED_ENABLE;
306 reg_val = MII_CFG1_AUTO_OP | MII_CFG1_LED_MODE_LINKUP |
307 MII_CFG1_LED_ENABLE;
308
309 reg_mask |= MII_CFG1_INTERFACE_MODE_MASK;
310 ret = tja11xx_get_interface_mode(phydev);
311 if (ret < 0)
312 return ret;
313
314 reg_val |= (ret & 0xffff);
315 ret = phy_modify(phydev, MII_CFG1, reg_mask, reg_val);
316 if (ret)
317 return ret;
318 break;
319 case PHY_ID_TJA1101:
320 reg_mask = MII_CFG1_INTERFACE_MODE_MASK;
321 ret = tja11xx_get_interface_mode(phydev);
322 if (ret < 0)
323 return ret;
324
325 reg_val = ret & 0xffff;
326 ret = phy_modify(phydev, MII_CFG1, reg_mask, reg_val);
327 if (ret)
328 return ret;
329 fallthrough;
330 case PHY_ID_TJA1102:
331 ret = phy_set_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP);
332 if (ret)
333 return ret;
334 break;
335 default:
336 return -EINVAL;
337 }
338
339 ret = phy_clear_bits(phydev, MII_CFG1, MII_CFG1_SLEEP_CONFIRM);
340 if (ret)
341 return ret;
342
343 ret = phy_modify(phydev, MII_CFG2, MII_CFG2_SLEEP_REQUEST_TO,
344 MII_CFG2_SLEEP_REQUEST_TO_16MS);
345 if (ret)
346 return ret;
347
348 ret = tja11xx_wakeup(phydev);
349 if (ret < 0)
350 return ret;
351
352 /* ACK interrupts by reading the status register */
353 ret = phy_read(phydev, MII_INTSRC);
354 if (ret < 0)
355 return ret;
356
357 return 0;
358 }
359
tja11xx_read_status(struct phy_device * phydev)360 static int tja11xx_read_status(struct phy_device *phydev)
361 {
362 int ret;
363
364 phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
365 phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED;
366
367 ret = genphy_update_link(phydev);
368 if (ret)
369 return ret;
370
371 ret = phy_read(phydev, MII_CFG1);
372 if (ret < 0)
373 return ret;
374
375 if (ret & MII_CFG1_MASTER_SLAVE)
376 phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE;
377 else
378 phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE;
379
380 if (phydev->link) {
381 ret = phy_read(phydev, MII_COMMSTAT);
382 if (ret < 0)
383 return ret;
384
385 if (!(ret & MII_COMMSTAT_LINK_UP))
386 phydev->link = 0;
387 }
388
389 return 0;
390 }
391
tja11xx_get_sqi(struct phy_device * phydev)392 static int tja11xx_get_sqi(struct phy_device *phydev)
393 {
394 int ret;
395
396 ret = phy_read(phydev, MII_COMMSTAT);
397 if (ret < 0)
398 return ret;
399
400 return FIELD_GET(MII_COMMSTAT_SQI_STATE, ret);
401 }
402
tja11xx_get_sqi_max(struct phy_device * phydev)403 static int tja11xx_get_sqi_max(struct phy_device *phydev)
404 {
405 return MII_COMMSTAT_SQI_MAX;
406 }
407
tja11xx_get_sset_count(struct phy_device * phydev)408 static int tja11xx_get_sset_count(struct phy_device *phydev)
409 {
410 return ARRAY_SIZE(tja11xx_hw_stats);
411 }
412
tja11xx_get_strings(struct phy_device * phydev,u8 * data)413 static void tja11xx_get_strings(struct phy_device *phydev, u8 *data)
414 {
415 int i;
416
417 for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++)
418 ethtool_puts(&data, tja11xx_hw_stats[i].string);
419 }
420
tja11xx_get_stats(struct phy_device * phydev,struct ethtool_stats * stats,u64 * data)421 static void tja11xx_get_stats(struct phy_device *phydev,
422 struct ethtool_stats *stats, u64 *data)
423 {
424 int i, ret;
425
426 for (i = 0; i < ARRAY_SIZE(tja11xx_hw_stats); i++) {
427 ret = phy_read(phydev, tja11xx_hw_stats[i].reg);
428 if (ret < 0)
429 data[i] = U64_MAX;
430 else {
431 data[i] = ret & tja11xx_hw_stats[i].mask;
432 data[i] >>= tja11xx_hw_stats[i].off;
433 }
434 }
435 }
436
tja11xx_hwmon_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * value)437 static int tja11xx_hwmon_read(struct device *dev,
438 enum hwmon_sensor_types type,
439 u32 attr, int channel, long *value)
440 {
441 struct phy_device *phydev = dev_get_drvdata(dev);
442 int ret;
443
444 if (type == hwmon_in && attr == hwmon_in_lcrit_alarm) {
445 ret = phy_read(phydev, MII_INTSRC);
446 if (ret < 0)
447 return ret;
448
449 *value = !!(ret & MII_INTSRC_TEMP_ERR);
450 return 0;
451 }
452
453 if (type == hwmon_temp && attr == hwmon_temp_crit_alarm) {
454 ret = phy_read(phydev, MII_INTSRC);
455 if (ret < 0)
456 return ret;
457
458 *value = !!(ret & MII_INTSRC_UV_ERR);
459 return 0;
460 }
461
462 return -EOPNOTSUPP;
463 }
464
tja11xx_hwmon_is_visible(const void * data,enum hwmon_sensor_types type,u32 attr,int channel)465 static umode_t tja11xx_hwmon_is_visible(const void *data,
466 enum hwmon_sensor_types type,
467 u32 attr, int channel)
468 {
469 if (type == hwmon_in && attr == hwmon_in_lcrit_alarm)
470 return 0444;
471
472 if (type == hwmon_temp && attr == hwmon_temp_crit_alarm)
473 return 0444;
474
475 return 0;
476 }
477
478 static const struct hwmon_channel_info * const tja11xx_hwmon_info[] = {
479 HWMON_CHANNEL_INFO(in, HWMON_I_LCRIT_ALARM),
480 HWMON_CHANNEL_INFO(temp, HWMON_T_CRIT_ALARM),
481 NULL
482 };
483
484 static const struct hwmon_ops tja11xx_hwmon_hwmon_ops = {
485 .is_visible = tja11xx_hwmon_is_visible,
486 .read = tja11xx_hwmon_read,
487 };
488
489 static const struct hwmon_chip_info tja11xx_hwmon_chip_info = {
490 .ops = &tja11xx_hwmon_hwmon_ops,
491 .info = tja11xx_hwmon_info,
492 };
493
tja11xx_hwmon_register(struct phy_device * phydev,struct tja11xx_priv * priv)494 static int tja11xx_hwmon_register(struct phy_device *phydev,
495 struct tja11xx_priv *priv)
496 {
497 struct device *dev = &phydev->mdio.dev;
498
499 priv->hwmon_name = devm_hwmon_sanitize_name(dev, dev_name(dev));
500 if (IS_ERR(priv->hwmon_name))
501 return PTR_ERR(priv->hwmon_name);
502
503 priv->hwmon_dev =
504 devm_hwmon_device_register_with_info(dev, priv->hwmon_name,
505 phydev,
506 &tja11xx_hwmon_chip_info,
507 NULL);
508
509 return PTR_ERR_OR_ZERO(priv->hwmon_dev);
510 }
511
tja11xx_parse_dt(struct phy_device * phydev)512 static int tja11xx_parse_dt(struct phy_device *phydev)
513 {
514 struct device_node *node = phydev->mdio.dev.of_node;
515 struct tja11xx_priv *priv = phydev->priv;
516
517 if (!IS_ENABLED(CONFIG_OF_MDIO))
518 return 0;
519
520 if (of_property_read_bool(node, "nxp,rmii-refclk-in"))
521 priv->flags |= TJA110X_RMII_MODE_REFCLK_IN;
522
523 return 0;
524 }
525
tja11xx_probe(struct phy_device * phydev)526 static int tja11xx_probe(struct phy_device *phydev)
527 {
528 struct device *dev = &phydev->mdio.dev;
529 struct tja11xx_priv *priv;
530 int ret;
531
532 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
533 if (!priv)
534 return -ENOMEM;
535
536 priv->phydev = phydev;
537 phydev->priv = priv;
538
539 ret = tja11xx_parse_dt(phydev);
540 if (ret)
541 return ret;
542
543 return tja11xx_hwmon_register(phydev, priv);
544 }
545
tja1102_p1_register(struct work_struct * work)546 static void tja1102_p1_register(struct work_struct *work)
547 {
548 struct tja11xx_priv *priv = container_of(work, struct tja11xx_priv,
549 phy_register_work);
550 struct phy_device *phydev_phy0 = priv->phydev;
551 struct mii_bus *bus = phydev_phy0->mdio.bus;
552 struct device *dev = &phydev_phy0->mdio.dev;
553 struct device_node *np = dev->of_node;
554 struct device_node *child;
555 int ret;
556
557 for_each_available_child_of_node(np, child) {
558 struct phy_device *phy;
559 int addr;
560
561 addr = of_mdio_parse_addr(dev, child);
562 if (addr < 0) {
563 dev_err(dev, "Can't parse addr\n");
564 continue;
565 } else if (addr != phydev_phy0->mdio.addr + 1) {
566 /* Currently we care only about double PHY chip TJA1102.
567 * If some day NXP will decide to bring chips with more
568 * PHYs, this logic should be reworked.
569 */
570 dev_err(dev, "Unexpected address. Should be: %i\n",
571 phydev_phy0->mdio.addr + 1);
572 continue;
573 }
574
575 if (mdiobus_is_registered_device(bus, addr)) {
576 dev_err(dev, "device is already registered\n");
577 continue;
578 }
579
580 /* Real PHY ID of Port 1 is 0 */
581 phy = phy_device_create(bus, addr, PHY_ID_TJA1102, false, NULL);
582 if (IS_ERR(phy)) {
583 dev_err(dev, "Can't create PHY device for Port 1: %i\n",
584 addr);
585 continue;
586 }
587
588 /* Overwrite parent device. phy_device_create() set parent to
589 * the mii_bus->dev, which is not correct in case.
590 */
591 phy->mdio.dev.parent = dev;
592
593 ret = of_mdiobus_phy_device_register(bus, phy, child, addr);
594 if (ret) {
595 /* All resources needed for Port 1 should be already
596 * available for Port 0. Both ports use the same
597 * interrupt line, so -EPROBE_DEFER would make no sense
598 * here.
599 */
600 dev_err(dev, "Can't register Port 1. Unexpected error: %i\n",
601 ret);
602 phy_device_free(phy);
603 }
604 }
605 }
606
tja1102_p0_probe(struct phy_device * phydev)607 static int tja1102_p0_probe(struct phy_device *phydev)
608 {
609 struct device *dev = &phydev->mdio.dev;
610 struct tja11xx_priv *priv;
611 int ret;
612
613 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
614 if (!priv)
615 return -ENOMEM;
616
617 priv->phydev = phydev;
618 INIT_WORK(&priv->phy_register_work, tja1102_p1_register);
619
620 ret = tja11xx_hwmon_register(phydev, priv);
621 if (ret)
622 return ret;
623
624 schedule_work(&priv->phy_register_work);
625
626 return 0;
627 }
628
tja1102_match_phy_device(struct phy_device * phydev,bool port0)629 static int tja1102_match_phy_device(struct phy_device *phydev, bool port0)
630 {
631 int ret;
632
633 if ((phydev->phy_id & PHY_ID_MASK) != PHY_ID_TJA1102)
634 return 0;
635
636 ret = phy_read(phydev, MII_PHYSID2);
637 if (ret < 0)
638 return ret;
639
640 /* TJA1102 Port 1 has phyid 0 and doesn't support temperature
641 * and undervoltage alarms.
642 */
643 if (port0)
644 return ret ? 1 : 0;
645
646 return !ret;
647 }
648
tja1102_p0_match_phy_device(struct phy_device * phydev)649 static int tja1102_p0_match_phy_device(struct phy_device *phydev)
650 {
651 return tja1102_match_phy_device(phydev, true);
652 }
653
tja1102_p1_match_phy_device(struct phy_device * phydev)654 static int tja1102_p1_match_phy_device(struct phy_device *phydev)
655 {
656 return tja1102_match_phy_device(phydev, false);
657 }
658
tja11xx_ack_interrupt(struct phy_device * phydev)659 static int tja11xx_ack_interrupt(struct phy_device *phydev)
660 {
661 int ret;
662
663 ret = phy_read(phydev, MII_INTSRC);
664
665 return (ret < 0) ? ret : 0;
666 }
667
tja11xx_config_intr(struct phy_device * phydev)668 static int tja11xx_config_intr(struct phy_device *phydev)
669 {
670 int value = 0;
671 int err;
672
673 if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
674 err = tja11xx_ack_interrupt(phydev);
675 if (err)
676 return err;
677
678 value = MII_INTEN_LINK_FAIL | MII_INTEN_LINK_UP |
679 MII_INTEN_UV_ERR | MII_INTEN_TEMP_ERR;
680 err = phy_write(phydev, MII_INTEN, value);
681 } else {
682 err = phy_write(phydev, MII_INTEN, value);
683 if (err)
684 return err;
685
686 err = tja11xx_ack_interrupt(phydev);
687 }
688
689 return err;
690 }
691
tja11xx_handle_interrupt(struct phy_device * phydev)692 static irqreturn_t tja11xx_handle_interrupt(struct phy_device *phydev)
693 {
694 struct device *dev = &phydev->mdio.dev;
695 int irq_status;
696
697 irq_status = phy_read(phydev, MII_INTSRC);
698 if (irq_status < 0) {
699 phy_error(phydev);
700 return IRQ_NONE;
701 }
702
703 if (irq_status & MII_INTSRC_TEMP_ERR)
704 dev_warn(dev, "Overtemperature error detected (temp > 155C°).\n");
705 if (irq_status & MII_INTSRC_UV_ERR)
706 dev_warn(dev, "Undervoltage error detected.\n");
707
708 if (!(irq_status & MII_INTSRC_MASK))
709 return IRQ_NONE;
710
711 phy_trigger_machine(phydev);
712
713 return IRQ_HANDLED;
714 }
715
tja11xx_cable_test_start(struct phy_device * phydev)716 static int tja11xx_cable_test_start(struct phy_device *phydev)
717 {
718 int ret;
719
720 ret = phy_clear_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP);
721 if (ret)
722 return ret;
723
724 ret = tja11xx_wakeup(phydev);
725 if (ret < 0)
726 return ret;
727
728 ret = tja11xx_disable_link_control(phydev);
729 if (ret < 0)
730 return ret;
731
732 return phy_set_bits(phydev, MII_ECTRL, MII_ECTRL_CABLE_TEST);
733 }
734
735 /*
736 * | BI_DA+ | BI_DA- | Result
737 * | open | open | open
738 * | + short to - | - short to + | short
739 * | short to Vdd | open | open
740 * | open | shot to Vdd | open
741 * | short to Vdd | short to Vdd | short
742 * | shot to GND | open | open
743 * | open | shot to GND | open
744 * | short to GND | shot to GND | short
745 * | connected to active link partner (master) | shot and open
746 */
tja11xx_cable_test_report_trans(u32 result)747 static int tja11xx_cable_test_report_trans(u32 result)
748 {
749 u32 mask = MII_EXTSTAT_SHORT_DETECT | MII_EXTSTAT_OPEN_DETECT;
750
751 if ((result & mask) == mask) {
752 /* connected to active link partner (master) */
753 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
754 } else if ((result & mask) == 0) {
755 return ETHTOOL_A_CABLE_RESULT_CODE_OK;
756 } else if (result & MII_EXTSTAT_SHORT_DETECT) {
757 return ETHTOOL_A_CABLE_RESULT_CODE_SAME_SHORT;
758 } else if (result & MII_EXTSTAT_OPEN_DETECT) {
759 return ETHTOOL_A_CABLE_RESULT_CODE_OPEN;
760 } else {
761 return ETHTOOL_A_CABLE_RESULT_CODE_UNSPEC;
762 }
763 }
764
tja11xx_cable_test_report(struct phy_device * phydev)765 static int tja11xx_cable_test_report(struct phy_device *phydev)
766 {
767 int ret;
768
769 ret = phy_read(phydev, MII_EXTSTAT);
770 if (ret < 0)
771 return ret;
772
773 ethnl_cable_test_result(phydev, ETHTOOL_A_CABLE_PAIR_A,
774 tja11xx_cable_test_report_trans(ret));
775
776 return 0;
777 }
778
tja11xx_cable_test_get_status(struct phy_device * phydev,bool * finished)779 static int tja11xx_cable_test_get_status(struct phy_device *phydev,
780 bool *finished)
781 {
782 int ret;
783
784 *finished = false;
785
786 ret = phy_read(phydev, MII_ECTRL);
787 if (ret < 0)
788 return ret;
789
790 if (!(ret & MII_ECTRL_CABLE_TEST)) {
791 *finished = true;
792
793 ret = phy_set_bits(phydev, MII_COMMCFG, MII_COMMCFG_AUTO_OP);
794 if (ret)
795 return ret;
796
797 return tja11xx_cable_test_report(phydev);
798 }
799
800 return 0;
801 }
802
803 static struct phy_driver tja11xx_driver[] = {
804 {
805 PHY_ID_MATCH_MODEL(PHY_ID_TJA1100),
806 .name = "NXP TJA1100",
807 .features = PHY_BASIC_T1_FEATURES,
808 .probe = tja11xx_probe,
809 .soft_reset = tja11xx_soft_reset,
810 .config_aneg = tja11xx_config_aneg,
811 .config_init = tja11xx_config_init,
812 .read_status = tja11xx_read_status,
813 .get_sqi = tja11xx_get_sqi,
814 .get_sqi_max = tja11xx_get_sqi_max,
815 .suspend = genphy_suspend,
816 .resume = genphy_resume,
817 .set_loopback = genphy_loopback,
818 /* Statistics */
819 .get_sset_count = tja11xx_get_sset_count,
820 .get_strings = tja11xx_get_strings,
821 .get_stats = tja11xx_get_stats,
822 }, {
823 PHY_ID_MATCH_MODEL(PHY_ID_TJA1101),
824 .name = "NXP TJA1101",
825 .features = PHY_BASIC_T1_FEATURES,
826 .probe = tja11xx_probe,
827 .soft_reset = tja11xx_soft_reset,
828 .config_aneg = tja11xx_config_aneg,
829 .config_init = tja11xx_config_init,
830 .read_status = tja11xx_read_status,
831 .get_sqi = tja11xx_get_sqi,
832 .get_sqi_max = tja11xx_get_sqi_max,
833 .suspend = genphy_suspend,
834 .resume = genphy_resume,
835 .set_loopback = genphy_loopback,
836 /* Statistics */
837 .get_sset_count = tja11xx_get_sset_count,
838 .get_strings = tja11xx_get_strings,
839 .get_stats = tja11xx_get_stats,
840 }, {
841 .name = "NXP TJA1102 Port 0",
842 .features = PHY_BASIC_T1_FEATURES,
843 .flags = PHY_POLL_CABLE_TEST,
844 .probe = tja1102_p0_probe,
845 .soft_reset = tja11xx_soft_reset,
846 .config_aneg = tja11xx_config_aneg,
847 .config_init = tja11xx_config_init,
848 .read_status = tja11xx_read_status,
849 .get_sqi = tja11xx_get_sqi,
850 .get_sqi_max = tja11xx_get_sqi_max,
851 .match_phy_device = tja1102_p0_match_phy_device,
852 .suspend = genphy_suspend,
853 .resume = genphy_resume,
854 .set_loopback = genphy_loopback,
855 /* Statistics */
856 .get_sset_count = tja11xx_get_sset_count,
857 .get_strings = tja11xx_get_strings,
858 .get_stats = tja11xx_get_stats,
859 .config_intr = tja11xx_config_intr,
860 .handle_interrupt = tja11xx_handle_interrupt,
861 .cable_test_start = tja11xx_cable_test_start,
862 .cable_test_get_status = tja11xx_cable_test_get_status,
863 }, {
864 .name = "NXP TJA1102 Port 1",
865 .features = PHY_BASIC_T1_FEATURES,
866 .flags = PHY_POLL_CABLE_TEST,
867 /* currently no probe for Port 1 is need */
868 .soft_reset = tja11xx_soft_reset,
869 .config_aneg = tja11xx_config_aneg,
870 .config_init = tja11xx_config_init,
871 .read_status = tja11xx_read_status,
872 .get_sqi = tja11xx_get_sqi,
873 .get_sqi_max = tja11xx_get_sqi_max,
874 .match_phy_device = tja1102_p1_match_phy_device,
875 .suspend = genphy_suspend,
876 .resume = genphy_resume,
877 .set_loopback = genphy_loopback,
878 /* Statistics */
879 .get_sset_count = tja11xx_get_sset_count,
880 .get_strings = tja11xx_get_strings,
881 .get_stats = tja11xx_get_stats,
882 .config_intr = tja11xx_config_intr,
883 .handle_interrupt = tja11xx_handle_interrupt,
884 .cable_test_start = tja11xx_cable_test_start,
885 .cable_test_get_status = tja11xx_cable_test_get_status,
886 }
887 };
888
889 module_phy_driver(tja11xx_driver);
890
891 static struct mdio_device_id __maybe_unused tja11xx_tbl[] = {
892 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1100) },
893 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1101) },
894 { PHY_ID_MATCH_MODEL(PHY_ID_TJA1102) },
895 { }
896 };
897
898 MODULE_DEVICE_TABLE(mdio, tja11xx_tbl);
899
900 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
901 MODULE_DESCRIPTION("NXP TJA11xx BoardR-Reach PHY driver");
902 MODULE_LICENSE("GPL");
903