?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
phy: sun4i: check PMU presence when poking unknown bit of pmu
[linux-2.6/btrfs-unstable.git] / drivers / phy / phy-sun4i-usb.c
blobfec34f5213c46739b5231f34bfe628731c231a9a
1 /*
2 * Allwinner sun4i USB phy driver
3 *
4 * Copyright (C) 2014-2015 Hans de Goede <hdegoede@redhat.com>
5 *
6 * Based on code from
7 * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
8 *
9 * Modelled after: Samsung S5P/EXYNOS SoC series MIPI CSIS/DSIM DPHY driver
10 * Copyright (C) 2013 Samsung Electronics Co., Ltd.
11 * Author: Sylwester Nawrocki <s.nawrocki@samsung.com>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 */
23
24 #include <linux/clk.h>
25 #include <linux/delay.h>
26 #include <linux/err.h>
27 #include <linux/extcon.h>
28 #include <linux/io.h>
29 #include <linux/interrupt.h>
30 #include <linux/kernel.h>
31 #include <linux/module.h>
32 #include <linux/mutex.h>
33 #include <linux/of.h>
34 #include <linux/of_address.h>
35 #include <linux/of_device.h>
36 #include <linux/of_gpio.h>
37 #include <linux/phy/phy.h>
38 #include <linux/phy/phy-sun4i-usb.h>
39 #include <linux/platform_device.h>
40 #include <linux/power_supply.h>
41 #include <linux/regulator/consumer.h>
42 #include <linux/reset.h>
43 #include <linux/spinlock.h>
44 #include <linux/usb/of.h>
45 #include <linux/workqueue.h>
46
47 #define REG_ISCR 0x00
48 #define REG_PHYCTL_A10 0x04
49 #define REG_PHYBIST 0x08
50 #define REG_PHYTUNE 0x0c
51 #define REG_PHYCTL_A33 0x10
52 #define REG_PHY_UNK_H3 0x20
53
54 #define REG_PMU_UNK1 0x10
55
56 #define PHYCTL_DATA BIT(7)
57
58 #define SUNXI_AHB_ICHR8_EN BIT(10)
59 #define SUNXI_AHB_INCR4_BURST_EN BIT(9)
60 #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8)
61 #define SUNXI_ULPI_BYPASS_EN BIT(0)
62
63 /* ISCR, Interface Status and Control bits */
64 #define ISCR_ID_PULLUP_EN (1 << 17)
65 #define ISCR_DPDM_PULLUP_EN (1 << 16)
66 /* sunxi has the phy id/vbus pins not connected, so we use the force bits */
67 #define ISCR_FORCE_ID_MASK (3 << 14)
68 #define ISCR_FORCE_ID_LOW (2 << 14)
69 #define ISCR_FORCE_ID_HIGH (3 << 14)
70 #define ISCR_FORCE_VBUS_MASK (3 << 12)
71 #define ISCR_FORCE_VBUS_LOW (2 << 12)
72 #define ISCR_FORCE_VBUS_HIGH (3 << 12)
73
74 /* Common Control Bits for Both PHYs */
75 #define PHY_PLL_BW 0x03
76 #define PHY_RES45_CAL_EN 0x0c
77
78 /* Private Control Bits for Each PHY */
79 #define PHY_TX_AMPLITUDE_TUNE 0x20
80 #define PHY_TX_SLEWRATE_TUNE 0x22
81 #define PHY_VBUSVALID_TH_SEL 0x25
82 #define PHY_PULLUP_RES_SEL 0x27
83 #define PHY_OTG_FUNC_EN 0x28
84 #define PHY_VBUS_DET_EN 0x29
85 #define PHY_DISCON_TH_SEL 0x2a
86 #define PHY_SQUELCH_DETECT 0x3c
87
88 #define MAX_PHYS 4
89
90 /*
91 * Note do not raise the debounce time, we must report Vusb high within 100ms
92 * otherwise we get Vbus errors
93 */
94 #define DEBOUNCE_TIME msecs_to_jiffies(50)
95 #define POLL_TIME msecs_to_jiffies(250)
96
97 enum sun4i_usb_phy_type {
98 sun4i_a10_phy,
99 sun6i_a31_phy,
100 sun8i_a33_phy,
101 sun8i_h3_phy,
102 sun50i_a64_phy,
103 };
104
105 struct sun4i_usb_phy_cfg {
106 int num_phys;
107 enum sun4i_usb_phy_type type;
108 u32 disc_thresh;
109 u8 phyctl_offset;
110 bool dedicated_clocks;
111 bool enable_pmu_unk1;
112 };
113
114 struct sun4i_usb_phy_data {
115 void __iomem *base;
116 const struct sun4i_usb_phy_cfg *cfg;
117 enum usb_dr_mode dr_mode;
118 spinlock_t reg_lock; /* guard access to phyctl reg */
119 struct sun4i_usb_phy {
120 struct phy *phy;
121 void __iomem *pmu;
122 struct regulator *vbus;
123 struct reset_control *reset;
124 struct clk *clk;
125 bool regulator_on;
126 int index;
127 } phys[MAX_PHYS];
128 /* phy0 / otg related variables */
129 struct extcon_dev *extcon;
130 bool phy0_init;
131 struct gpio_desc *id_det_gpio;
132 struct gpio_desc *vbus_det_gpio;
133 struct power_supply *vbus_power_supply;
134 struct notifier_block vbus_power_nb;
135 bool vbus_power_nb_registered;
136 bool force_session_end;
137 int id_det_irq;
138 int vbus_det_irq;
139 int id_det;
140 int vbus_det;
141 struct delayed_work detect;
142 };
143
144 #define to_sun4i_usb_phy_data(phy) \
145 container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
146
147 static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
148 {
149 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
150 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
151 u32 iscr;
152
153 iscr = readl(data->base + REG_ISCR);
154 iscr &= ~clr;
155 iscr |= set;
156 writel(iscr, data->base + REG_ISCR);
157 }
158
159 static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
160 {
161 if (val)
162 val = ISCR_FORCE_ID_HIGH;
163 else
164 val = ISCR_FORCE_ID_LOW;
165
166 sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
167 }
168
169 static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
170 {
171 if (val)
172 val = ISCR_FORCE_VBUS_HIGH;
173 else
174 val = ISCR_FORCE_VBUS_LOW;
175
176 sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
177 }
178
179 static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
180 int len)
181 {
182 struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
183 u32 temp, usbc_bit = BIT(phy->index * 2);
184 void __iomem *phyctl = phy_data->base + phy_data->cfg->phyctl_offset;
185 unsigned long flags;
186 int i;
187
188 spin_lock_irqsave(&phy_data->reg_lock, flags);
189
190 if (phy_data->cfg->type == sun8i_a33_phy ||
191 phy_data->cfg->type == sun50i_a64_phy) {
192 /* A33 or A64 needs us to set phyctl to 0 explicitly */
193 writel(0, phyctl);
194 }
195
196 for (i = 0; i < len; i++) {
197 temp = readl(phyctl);
198
199 /* clear the address portion */
200 temp &= ~(0xff << 8);
201
202 /* set the address */
203 temp |= ((addr + i) << 8);
204 writel(temp, phyctl);
205
206 /* set the data bit and clear usbc bit*/
207 temp = readb(phyctl);
208 if (data & 0x1)
209 temp |= PHYCTL_DATA;
210 else
211 temp &= ~PHYCTL_DATA;
212 temp &= ~usbc_bit;
213 writeb(temp, phyctl);
214
215 /* pulse usbc_bit */
216 temp = readb(phyctl);
217 temp |= usbc_bit;
218 writeb(temp, phyctl);
219
220 temp = readb(phyctl);
221 temp &= ~usbc_bit;
222 writeb(temp, phyctl);
223
224 data >>= 1;
225 }
226
227 spin_unlock_irqrestore(&phy_data->reg_lock, flags);
228 }
229
230 static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
231 {
232 u32 bits, reg_value;
233
234 if (!phy->pmu)
235 return;
236
237 bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
238 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
239
240 reg_value = readl(phy->pmu);
241
242 if (enable)
243 reg_value |= bits;
244 else
245 reg_value &= ~bits;
246
247 writel(reg_value, phy->pmu);
248 }
249
250 static int sun4i_usb_phy_init(struct phy *_phy)
251 {
252 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
253 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
254 int ret;
255 u32 val;
256
257 ret = clk_prepare_enable(phy->clk);
258 if (ret)
259 return ret;
260
261 ret = reset_control_deassert(phy->reset);
262 if (ret) {
263 clk_disable_unprepare(phy->clk);
264 return ret;
265 }
266
267 if (phy->pmu && data->cfg->enable_pmu_unk1) {
268 val = readl(phy->pmu + REG_PMU_UNK1);
269 writel(val & ~2, phy->pmu + REG_PMU_UNK1);
270 }
271
272 if (data->cfg->type == sun8i_h3_phy) {
273 if (phy->index == 0) {
274 val = readl(data->base + REG_PHY_UNK_H3);
275 writel(val & ~1, data->base + REG_PHY_UNK_H3);
276 }
277 } else {
278 /* Enable USB 45 Ohm resistor calibration */
279 if (phy->index == 0)
280 sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
281
282 /* Adjust PHY's magnitude and rate */
283 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
284
285 /* Disconnect threshold adjustment */
286 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL,
287 data->cfg->disc_thresh, 2);
288 }
289
290 sun4i_usb_phy_passby(phy, 1);
291
292 if (phy->index == 0) {
293 data->phy0_init = true;
294
295 /* Enable pull-ups */
296 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
297 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
298
299 /* Force ISCR and cable state updates */
300 data->id_det = -1;
301 data->vbus_det = -1;
302 queue_delayed_work(system_wq, &data->detect, 0);
303 }
304
305 return 0;
306 }
307
308 static int sun4i_usb_phy_exit(struct phy *_phy)
309 {
310 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
311 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
312
313 if (phy->index == 0) {
314 /* Disable pull-ups */
315 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
316 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
317 data->phy0_init = false;
318 }
319
320 sun4i_usb_phy_passby(phy, 0);
321 reset_control_assert(phy->reset);
322 clk_disable_unprepare(phy->clk);
323
324 return 0;
325 }
326
327 static int sun4i_usb_phy0_get_id_det(struct sun4i_usb_phy_data *data)
328 {
329 switch (data->dr_mode) {
330 case USB_DR_MODE_OTG:
331 if (data->id_det_gpio)
332 return gpiod_get_value_cansleep(data->id_det_gpio);
333 else
334 return 1; /* Fallback to peripheral mode */
335 case USB_DR_MODE_HOST:
336 return 0;
337 case USB_DR_MODE_PERIPHERAL:
338 default:
339 return 1;
340 }
341 }
342
343 static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
344 {
345 if (data->vbus_det_gpio)
346 return gpiod_get_value_cansleep(data->vbus_det_gpio);
347
348 if (data->vbus_power_supply) {
349 union power_supply_propval val;
350 int r;
351
352 r = power_supply_get_property(data->vbus_power_supply,
353 POWER_SUPPLY_PROP_PRESENT, &val);
354 if (r == 0)
355 return val.intval;
356 }
357
358 /* Fallback: report vbus as high */
359 return 1;
360 }
361
362 static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
363 {
364 return data->vbus_det_gpio || data->vbus_power_supply;
365 }
366
367 static bool sun4i_usb_phy0_poll(struct sun4i_usb_phy_data *data)
368 {
369 if ((data->id_det_gpio && data->id_det_irq <= 0) ||
370 (data->vbus_det_gpio && data->vbus_det_irq <= 0))
371 return true;
372
373 /*
374 * The A31 companion pmic (axp221) does not generate vbus change
375 * interrupts when the board is driving vbus, so we must poll
376 * when using the pmic for vbus-det _and_ we're driving vbus.
377 */
378 if (data->cfg->type == sun6i_a31_phy &&
379 data->vbus_power_supply && data->phys[0].regulator_on)
380 return true;
381
382 return false;
383 }
384
385 static int sun4i_usb_phy_power_on(struct phy *_phy)
386 {
387 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
388 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
389 int ret;
390
391 if (!phy->vbus || phy->regulator_on)
392 return 0;
393
394 /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
395 if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
396 data->vbus_det) {
397 dev_warn(&_phy->dev, "External vbus detected, not enabling our own vbus\n");
398 return 0;
399 }
400
401 ret = regulator_enable(phy->vbus);
402 if (ret)
403 return ret;
404
405 phy->regulator_on = true;
406
407 /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
408 if (phy->index == 0 && sun4i_usb_phy0_poll(data))
409 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
410
411 return 0;
412 }
413
414 static int sun4i_usb_phy_power_off(struct phy *_phy)
415 {
416 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
417 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
418
419 if (!phy->vbus || !phy->regulator_on)
420 return 0;
421
422 regulator_disable(phy->vbus);
423 phy->regulator_on = false;
424
425 /*
426 * phy0 vbus typically slowly discharges, sometimes this causes the
427 * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
428 */
429 if (phy->index == 0 && !sun4i_usb_phy0_poll(data))
430 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
431
432 return 0;
433 }
434
435 static int sun4i_usb_phy_set_mode(struct phy *_phy, enum phy_mode mode)
436 {
437 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
438 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
439
440 if (phy->index != 0)
441 return -EINVAL;
442
443 switch (mode) {
444 case PHY_MODE_USB_HOST:
445 data->dr_mode = USB_DR_MODE_HOST;
446 break;
447 case PHY_MODE_USB_DEVICE:
448 data->dr_mode = USB_DR_MODE_PERIPHERAL;
449 break;
450 case PHY_MODE_USB_OTG:
451 data->dr_mode = USB_DR_MODE_OTG;
452 break;
453 default:
454 return -EINVAL;
455 }
456
457 dev_info(&_phy->dev, "Changing dr_mode to %d\n", (int)data->dr_mode);
458 data->force_session_end = true;
459 queue_delayed_work(system_wq, &data->detect, 0);
460
461 return 0;
462 }
463
464 void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
465 {
466 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
467
468 sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
469 }
470 EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
471
472 static const struct phy_ops sun4i_usb_phy_ops = {
473 .init = sun4i_usb_phy_init,
474 .exit = sun4i_usb_phy_exit,
475 .power_on = sun4i_usb_phy_power_on,
476 .power_off = sun4i_usb_phy_power_off,
477 .set_mode = sun4i_usb_phy_set_mode,
478 .owner = THIS_MODULE,
479 };
480
481 static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
482 {
483 struct sun4i_usb_phy_data *data =
484 container_of(work, struct sun4i_usb_phy_data, detect.work);
485 struct phy *phy0 = data->phys[0].phy;
486 bool force_session_end, id_notify = false, vbus_notify = false;
487 int id_det, vbus_det;
488
489 if (phy0 == NULL)
490 return;
491
492 id_det = sun4i_usb_phy0_get_id_det(data);
493 vbus_det = sun4i_usb_phy0_get_vbus_det(data);
494
495 mutex_lock(&phy0->mutex);
496
497 if (!data->phy0_init) {
498 mutex_unlock(&phy0->mutex);
499 return;
500 }
501
502 force_session_end = data->force_session_end;
503 data->force_session_end = false;
504
505 if (id_det != data->id_det) {
506 /* id-change, force session end if we've no vbus detection */
507 if (data->dr_mode == USB_DR_MODE_OTG &&
508 !sun4i_usb_phy0_have_vbus_det(data))
509 force_session_end = true;
510
511 /* When entering host mode (id = 0) force end the session now */
512 if (force_session_end && id_det == 0) {
513 sun4i_usb_phy0_set_vbus_detect(phy0, 0);
514 msleep(200);
515 sun4i_usb_phy0_set_vbus_detect(phy0, 1);
516 }
517 sun4i_usb_phy0_set_id_detect(phy0, id_det);
518 data->id_det = id_det;
519 id_notify = true;
520 }
521
522 if (vbus_det != data->vbus_det) {
523 sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
524 data->vbus_det = vbus_det;
525 vbus_notify = true;
526 }
527
528 mutex_unlock(&phy0->mutex);
529
530 if (id_notify) {
531 extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
532 !id_det);
533 /* When leaving host mode force end the session here */
534 if (force_session_end && id_det == 1) {
535 mutex_lock(&phy0->mutex);
536 sun4i_usb_phy0_set_vbus_detect(phy0, 0);
537 msleep(1000);
538 sun4i_usb_phy0_set_vbus_detect(phy0, 1);
539 mutex_unlock(&phy0->mutex);
540 }
541 }
542
543 if (vbus_notify)
544 extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
545
546 if (sun4i_usb_phy0_poll(data))
547 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
548 }
549
550 static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
551 {
552 struct sun4i_usb_phy_data *data = dev_id;
553
554 /* vbus or id changed, let the pins settle and then scan them */
555 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
556
557 return IRQ_HANDLED;
558 }
559
560 static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
561 unsigned long val, void *v)
562 {
563 struct sun4i_usb_phy_data *data =
564 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
565 struct power_supply *psy = v;
566
567 /* Properties on the vbus_power_supply changed, scan vbus_det */
568 if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
569 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
570
571 return NOTIFY_OK;
572 }
573
574 static struct phy *sun4i_usb_phy_xlate(struct device *dev,
575 struct of_phandle_args *args)
576 {
577 struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
578
579 if (args->args[0] >= data->cfg->num_phys)
580 return ERR_PTR(-ENODEV);
581
582 return data->phys[args->args[0]].phy;
583 }
584
585 static int sun4i_usb_phy_remove(struct platform_device *pdev)
586 {
587 struct device *dev = &pdev->dev;
588 struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
589
590 if (data->vbus_power_nb_registered)
591 power_supply_unreg_notifier(&data->vbus_power_nb);
592 if (data->id_det_irq > 0)
593 devm_free_irq(dev, data->id_det_irq, data);
594 if (data->vbus_det_irq > 0)
595 devm_free_irq(dev, data->vbus_det_irq, data);
596
597 cancel_delayed_work_sync(&data->detect);
598
599 return 0;
600 }
601
602 static const unsigned int sun4i_usb_phy0_cable[] = {
603 EXTCON_USB,
604 EXTCON_USB_HOST,
605 EXTCON_NONE,
606 };
607
608 static int sun4i_usb_phy_probe(struct platform_device *pdev)
609 {
610 struct sun4i_usb_phy_data *data;
611 struct device *dev = &pdev->dev;
612 struct device_node *np = dev->of_node;
613 struct phy_provider *phy_provider;
614 struct resource *res;
615 int i, ret;
616
617 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
618 if (!data)
619 return -ENOMEM;
620
621 spin_lock_init(&data->reg_lock);
622 INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
623 dev_set_drvdata(dev, data);
624 data->cfg = of_device_get_match_data(dev);
625 if (!data->cfg)
626 return -EINVAL;
627
628 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
629 data->base = devm_ioremap_resource(dev, res);
630 if (IS_ERR(data->base))
631 return PTR_ERR(data->base);
632
633 data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
634 GPIOD_IN);
635 if (IS_ERR(data->id_det_gpio))
636 return PTR_ERR(data->id_det_gpio);
637
638 data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
639 GPIOD_IN);
640 if (IS_ERR(data->vbus_det_gpio))
641 return PTR_ERR(data->vbus_det_gpio);
642
643 if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
644 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
645 "usb0_vbus_power-supply");
646 if (IS_ERR(data->vbus_power_supply))
647 return PTR_ERR(data->vbus_power_supply);
648
649 if (!data->vbus_power_supply)
650 return -EPROBE_DEFER;
651 }
652
653 data->dr_mode = of_usb_get_dr_mode_by_phy(np, 0);
654
655 data->extcon = devm_extcon_dev_allocate(dev, sun4i_usb_phy0_cable);
656 if (IS_ERR(data->extcon))
657 return PTR_ERR(data->extcon);
658
659 ret = devm_extcon_dev_register(dev, data->extcon);
660 if (ret) {
661 dev_err(dev, "failed to register extcon: %d\n", ret);
662 return ret;
663 }
664
665 for (i = 0; i < data->cfg->num_phys; i++) {
666 struct sun4i_usb_phy *phy = data->phys + i;
667 char name[16];
668
669 snprintf(name, sizeof(name), "usb%d_vbus", i);
670 phy->vbus = devm_regulator_get_optional(dev, name);
671 if (IS_ERR(phy->vbus)) {
672 if (PTR_ERR(phy->vbus) == -EPROBE_DEFER)
673 return -EPROBE_DEFER;
674 phy->vbus = NULL;
675 }
676
677 if (data->cfg->dedicated_clocks)
678 snprintf(name, sizeof(name), "usb%d_phy", i);
679 else
680 strlcpy(name, "usb_phy", sizeof(name));
681
682 phy->clk = devm_clk_get(dev, name);
683 if (IS_ERR(phy->clk)) {
684 dev_err(dev, "failed to get clock %s\n", name);
685 return PTR_ERR(phy->clk);
686 }
687
688 snprintf(name, sizeof(name), "usb%d_reset", i);
689 phy->reset = devm_reset_control_get(dev, name);
690 if (IS_ERR(phy->reset)) {
691 dev_err(dev, "failed to get reset %s\n", name);
692 return PTR_ERR(phy->reset);
693 }
694
695 if (i) { /* No pmu for usbc0 */
696 snprintf(name, sizeof(name), "pmu%d", i);
697 res = platform_get_resource_byname(pdev,
698 IORESOURCE_MEM, name);
699 phy->pmu = devm_ioremap_resource(dev, res);
700 if (IS_ERR(phy->pmu))
701 return PTR_ERR(phy->pmu);
702 }
703
704 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
705 if (IS_ERR(phy->phy)) {
706 dev_err(dev, "failed to create PHY %d\n", i);
707 return PTR_ERR(phy->phy);
708 }
709
710 phy->index = i;
711 phy_set_drvdata(phy->phy, &data->phys[i]);
712 }
713
714 data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
715 if (data->id_det_irq > 0) {
716 ret = devm_request_irq(dev, data->id_det_irq,
717 sun4i_usb_phy0_id_vbus_det_irq,
718 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
719 "usb0-id-det", data);
720 if (ret) {
721 dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
722 return ret;
723 }
724 }
725
726 data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
727 if (data->vbus_det_irq > 0) {
728 ret = devm_request_irq(dev, data->vbus_det_irq,
729 sun4i_usb_phy0_id_vbus_det_irq,
730 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
731 "usb0-vbus-det", data);
732 if (ret) {
733 dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
734 data->vbus_det_irq = -1;
735 sun4i_usb_phy_remove(pdev); /* Stop detect work */
736 return ret;
737 }
738 }
739
740 if (data->vbus_power_supply) {
741 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
742 data->vbus_power_nb.priority = 0;
743 ret = power_supply_reg_notifier(&data->vbus_power_nb);
744 if (ret) {
745 sun4i_usb_phy_remove(pdev); /* Stop detect work */
746 return ret;
747 }
748 data->vbus_power_nb_registered = true;
749 }
750
751 phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
752 if (IS_ERR(phy_provider)) {
753 sun4i_usb_phy_remove(pdev); /* Stop detect work */
754 return PTR_ERR(phy_provider);
755 }
756
757 return 0;
758 }
759
760 static const struct sun4i_usb_phy_cfg sun4i_a10_cfg = {
761 .num_phys = 3,
762 .type = sun4i_a10_phy,
763 .disc_thresh = 3,
764 .phyctl_offset = REG_PHYCTL_A10,
765 .dedicated_clocks = false,
766 .enable_pmu_unk1 = false,
767 };
768
769 static const struct sun4i_usb_phy_cfg sun5i_a13_cfg = {
770 .num_phys = 2,
771 .type = sun4i_a10_phy,
772 .disc_thresh = 2,
773 .phyctl_offset = REG_PHYCTL_A10,
774 .dedicated_clocks = false,
775 .enable_pmu_unk1 = false,
776 };
777
778 static const struct sun4i_usb_phy_cfg sun6i_a31_cfg = {
779 .num_phys = 3,
780 .type = sun6i_a31_phy,
781 .disc_thresh = 3,
782 .phyctl_offset = REG_PHYCTL_A10,
783 .dedicated_clocks = true,
784 .enable_pmu_unk1 = false,
785 };
786
787 static const struct sun4i_usb_phy_cfg sun7i_a20_cfg = {
788 .num_phys = 3,
789 .type = sun4i_a10_phy,
790 .disc_thresh = 2,
791 .phyctl_offset = REG_PHYCTL_A10,
792 .dedicated_clocks = false,
793 .enable_pmu_unk1 = false,
794 };
795
796 static const struct sun4i_usb_phy_cfg sun8i_a23_cfg = {
797 .num_phys = 2,
798 .type = sun4i_a10_phy,
799 .disc_thresh = 3,
800 .phyctl_offset = REG_PHYCTL_A10,
801 .dedicated_clocks = true,
802 .enable_pmu_unk1 = false,
803 };
804
805 static const struct sun4i_usb_phy_cfg sun8i_a33_cfg = {
806 .num_phys = 2,
807 .type = sun8i_a33_phy,
808 .disc_thresh = 3,
809 .phyctl_offset = REG_PHYCTL_A33,
810 .dedicated_clocks = true,
811 .enable_pmu_unk1 = false,
812 };
813
814 static const struct sun4i_usb_phy_cfg sun8i_h3_cfg = {
815 .num_phys = 4,
816 .type = sun8i_h3_phy,
817 .disc_thresh = 3,
818 .dedicated_clocks = true,
819 .enable_pmu_unk1 = true,
820 };
821
822 static const struct sun4i_usb_phy_cfg sun50i_a64_cfg = {
823 .num_phys = 2,
824 .type = sun50i_a64_phy,
825 .disc_thresh = 3,
826 .phyctl_offset = REG_PHYCTL_A33,
827 .dedicated_clocks = true,
828 .enable_pmu_unk1 = true,
829 };
830
831 static const struct of_device_id sun4i_usb_phy_of_match[] = {
832 { .compatible = "allwinner,sun4i-a10-usb-phy", .data = &sun4i_a10_cfg },
833 { .compatible = "allwinner,sun5i-a13-usb-phy", .data = &sun5i_a13_cfg },
834 { .compatible = "allwinner,sun6i-a31-usb-phy", .data = &sun6i_a31_cfg },
835 { .compatible = "allwinner,sun7i-a20-usb-phy", .data = &sun7i_a20_cfg },
836 { .compatible = "allwinner,sun8i-a23-usb-phy", .data = &sun8i_a23_cfg },
837 { .compatible = "allwinner,sun8i-a33-usb-phy", .data = &sun8i_a33_cfg },
838 { .compatible = "allwinner,sun8i-h3-usb-phy", .data = &sun8i_h3_cfg },
839 { .compatible = "allwinner,sun50i-a64-usb-phy",
840 .data = &sun50i_a64_cfg},
841 { },
842 };
843 MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
844
845 static struct platform_driver sun4i_usb_phy_driver = {
846 .probe = sun4i_usb_phy_probe,
847 .remove = sun4i_usb_phy_remove,
848 .driver = {
849 .of_match_table = sun4i_usb_phy_of_match,
850 .name = "sun4i-usb-phy",
851 }
852 };
853 module_platform_driver(sun4i_usb_phy_driver);
854
855 MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
856 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
857 MODULE_LICENSE("GPL v2");
(deprecated) Btrfs devel tree