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_gpio.h>
36 #include <linux/phy/phy.h>
37 #include <linux/phy/phy-sun4i-usb.h>
38 #include <linux/platform_device.h>
39 #include <linux/power_supply.h>
40 #include <linux/regulator/consumer.h>
41 #include <linux/reset.h>
42 #include <linux/workqueue.h>
43
44 #define REG_ISCR 0x00
45 #define REG_PHYCTL_A10 0x04
46 #define REG_PHYBIST 0x08
47 #define REG_PHYTUNE 0x0c
48 #define REG_PHYCTL_A33 0x10
49
50 #define PHYCTL_DATA BIT(7)
51
52 #define SUNXI_AHB_ICHR8_EN BIT(10)
53 #define SUNXI_AHB_INCR4_BURST_EN BIT(9)
54 #define SUNXI_AHB_INCRX_ALIGN_EN BIT(8)
55 #define SUNXI_ULPI_BYPASS_EN BIT(0)
56
57 /* ISCR, Interface Status and Control bits */
58 #define ISCR_ID_PULLUP_EN (1 << 17)
59 #define ISCR_DPDM_PULLUP_EN (1 << 16)
60 /* sunxi has the phy id/vbus pins not connected, so we use the force bits */
61 #define ISCR_FORCE_ID_MASK (3 << 14)
62 #define ISCR_FORCE_ID_LOW (2 << 14)
63 #define ISCR_FORCE_ID_HIGH (3 << 14)
64 #define ISCR_FORCE_VBUS_MASK (3 << 12)
65 #define ISCR_FORCE_VBUS_LOW (2 << 12)
66 #define ISCR_FORCE_VBUS_HIGH (3 << 12)
67
68 /* Common Control Bits for Both PHYs */
69 #define PHY_PLL_BW 0x03
70 #define PHY_RES45_CAL_EN 0x0c
71
72 /* Private Control Bits for Each PHY */
73 #define PHY_TX_AMPLITUDE_TUNE 0x20
74 #define PHY_TX_SLEWRATE_TUNE 0x22
75 #define PHY_VBUSVALID_TH_SEL 0x25
76 #define PHY_PULLUP_RES_SEL 0x27
77 #define PHY_OTG_FUNC_EN 0x28
78 #define PHY_VBUS_DET_EN 0x29
79 #define PHY_DISCON_TH_SEL 0x2a
80 #define PHY_SQUELCH_DETECT 0x3c
81
82 #define MAX_PHYS 3
83
84 /*
85 * Note do not raise the debounce time, we must report Vusb high within 100ms
86 * otherwise we get Vbus errors
87 */
88 #define DEBOUNCE_TIME msecs_to_jiffies(50)
89 #define POLL_TIME msecs_to_jiffies(250)
90
91 struct sun4i_usb_phy_data {
92 void __iomem *base;
93 struct mutex mutex;
94 int num_phys;
95 u32 disc_thresh;
96 bool has_a33_phyctl;
97 struct sun4i_usb_phy {
98 struct phy *phy;
99 void __iomem *pmu;
100 struct regulator *vbus;
101 struct reset_control *reset;
102 struct clk *clk;
103 bool regulator_on;
104 int index;
105 } phys[MAX_PHYS];
106 /* phy0 / otg related variables */
107 struct extcon_dev *extcon;
108 bool phy0_init;
109 bool phy0_poll;
110 struct gpio_desc *id_det_gpio;
111 struct gpio_desc *vbus_det_gpio;
112 struct power_supply *vbus_power_supply;
113 struct notifier_block vbus_power_nb;
114 bool vbus_power_nb_registered;
115 int id_det_irq;
116 int vbus_det_irq;
117 int id_det;
118 int vbus_det;
119 struct delayed_work detect;
120 };
121
122 #define to_sun4i_usb_phy_data(phy) \
123 container_of((phy), struct sun4i_usb_phy_data, phys[(phy)->index])
124
sun4i_usb_phy0_update_iscr(struct phy * _phy,u32 clr,u32 set)125 static void sun4i_usb_phy0_update_iscr(struct phy *_phy, u32 clr, u32 set)
126 {
127 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
128 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
129 u32 iscr;
130
131 iscr = readl(data->base + REG_ISCR);
132 iscr &= ~clr;
133 iscr |= set;
134 writel(iscr, data->base + REG_ISCR);
135 }
136
sun4i_usb_phy0_set_id_detect(struct phy * phy,u32 val)137 static void sun4i_usb_phy0_set_id_detect(struct phy *phy, u32 val)
138 {
139 if (val)
140 val = ISCR_FORCE_ID_HIGH;
141 else
142 val = ISCR_FORCE_ID_LOW;
143
144 sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_ID_MASK, val);
145 }
146
sun4i_usb_phy0_set_vbus_detect(struct phy * phy,u32 val)147 static void sun4i_usb_phy0_set_vbus_detect(struct phy *phy, u32 val)
148 {
149 if (val)
150 val = ISCR_FORCE_VBUS_HIGH;
151 else
152 val = ISCR_FORCE_VBUS_LOW;
153
154 sun4i_usb_phy0_update_iscr(phy, ISCR_FORCE_VBUS_MASK, val);
155 }
156
sun4i_usb_phy_write(struct sun4i_usb_phy * phy,u32 addr,u32 data,int len)157 static void sun4i_usb_phy_write(struct sun4i_usb_phy *phy, u32 addr, u32 data,
158 int len)
159 {
160 struct sun4i_usb_phy_data *phy_data = to_sun4i_usb_phy_data(phy);
161 u32 temp, usbc_bit = BIT(phy->index * 2);
162 void *phyctl;
163 int i;
164
165 mutex_lock(&phy_data->mutex);
166
167 if (phy_data->has_a33_phyctl) {
168 phyctl = phy_data->base + REG_PHYCTL_A33;
169 /* A33 needs us to set phyctl to 0 explicitly */
170 writel(0, phyctl);
171 } else {
172 phyctl = phy_data->base + REG_PHYCTL_A10;
173 }
174
175 for (i = 0; i < len; i++) {
176 temp = readl(phyctl);
177
178 /* clear the address portion */
179 temp &= ~(0xff << 8);
180
181 /* set the address */
182 temp |= ((addr + i) << 8);
183 writel(temp, phyctl);
184
185 /* set the data bit and clear usbc bit*/
186 temp = readb(phyctl);
187 if (data & 0x1)
188 temp |= PHYCTL_DATA;
189 else
190 temp &= ~PHYCTL_DATA;
191 temp &= ~usbc_bit;
192 writeb(temp, phyctl);
193
194 /* pulse usbc_bit */
195 temp = readb(phyctl);
196 temp |= usbc_bit;
197 writeb(temp, phyctl);
198
199 temp = readb(phyctl);
200 temp &= ~usbc_bit;
201 writeb(temp, phyctl);
202
203 data >>= 1;
204 }
205 mutex_unlock(&phy_data->mutex);
206 }
207
sun4i_usb_phy_passby(struct sun4i_usb_phy * phy,int enable)208 static void sun4i_usb_phy_passby(struct sun4i_usb_phy *phy, int enable)
209 {
210 u32 bits, reg_value;
211
212 if (!phy->pmu)
213 return;
214
215 bits = SUNXI_AHB_ICHR8_EN | SUNXI_AHB_INCR4_BURST_EN |
216 SUNXI_AHB_INCRX_ALIGN_EN | SUNXI_ULPI_BYPASS_EN;
217
218 reg_value = readl(phy->pmu);
219
220 if (enable)
221 reg_value |= bits;
222 else
223 reg_value &= ~bits;
224
225 writel(reg_value, phy->pmu);
226 }
227
sun4i_usb_phy_init(struct phy * _phy)228 static int sun4i_usb_phy_init(struct phy *_phy)
229 {
230 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
231 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
232 int ret;
233
234 ret = clk_prepare_enable(phy->clk);
235 if (ret)
236 return ret;
237
238 ret = reset_control_deassert(phy->reset);
239 if (ret) {
240 clk_disable_unprepare(phy->clk);
241 return ret;
242 }
243
244 /* Enable USB 45 Ohm resistor calibration */
245 if (phy->index == 0)
246 sun4i_usb_phy_write(phy, PHY_RES45_CAL_EN, 0x01, 1);
247
248 /* Adjust PHY's magnitude and rate */
249 sun4i_usb_phy_write(phy, PHY_TX_AMPLITUDE_TUNE, 0x14, 5);
250
251 /* Disconnect threshold adjustment */
252 sun4i_usb_phy_write(phy, PHY_DISCON_TH_SEL, data->disc_thresh, 2);
253
254 sun4i_usb_phy_passby(phy, 1);
255
256 if (phy->index == 0) {
257 data->phy0_init = true;
258
259 /* Enable pull-ups */
260 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_DPDM_PULLUP_EN);
261 sun4i_usb_phy0_update_iscr(_phy, 0, ISCR_ID_PULLUP_EN);
262
263 if (data->id_det_gpio) {
264 /* OTG mode, force ISCR and cable state updates */
265 data->id_det = -1;
266 data->vbus_det = -1;
267 queue_delayed_work(system_wq, &data->detect, 0);
268 } else {
269 /* Host only mode */
270 sun4i_usb_phy0_set_id_detect(_phy, 0);
271 sun4i_usb_phy0_set_vbus_detect(_phy, 1);
272 }
273 }
274
275 return 0;
276 }
277
sun4i_usb_phy_exit(struct phy * _phy)278 static int sun4i_usb_phy_exit(struct phy *_phy)
279 {
280 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
281 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
282
283 if (phy->index == 0) {
284 /* Disable pull-ups */
285 sun4i_usb_phy0_update_iscr(_phy, ISCR_DPDM_PULLUP_EN, 0);
286 sun4i_usb_phy0_update_iscr(_phy, ISCR_ID_PULLUP_EN, 0);
287 data->phy0_init = false;
288 }
289
290 sun4i_usb_phy_passby(phy, 0);
291 reset_control_assert(phy->reset);
292 clk_disable_unprepare(phy->clk);
293
294 return 0;
295 }
296
sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data * data)297 static int sun4i_usb_phy0_get_vbus_det(struct sun4i_usb_phy_data *data)
298 {
299 if (data->vbus_det_gpio)
300 return gpiod_get_value_cansleep(data->vbus_det_gpio);
301
302 if (data->vbus_power_supply) {
303 union power_supply_propval val;
304 int r;
305
306 r = power_supply_get_property(data->vbus_power_supply,
307 POWER_SUPPLY_PROP_PRESENT, &val);
308 if (r == 0)
309 return val.intval;
310 }
311
312 /* Fallback: report vbus as high */
313 return 1;
314 }
315
sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data * data)316 static bool sun4i_usb_phy0_have_vbus_det(struct sun4i_usb_phy_data *data)
317 {
318 return data->vbus_det_gpio || data->vbus_power_supply;
319 }
320
sun4i_usb_phy_power_on(struct phy * _phy)321 static int sun4i_usb_phy_power_on(struct phy *_phy)
322 {
323 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
324 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
325 int ret;
326
327 if (!phy->vbus || phy->regulator_on)
328 return 0;
329
330 /* For phy0 only turn on Vbus if we don't have an ext. Vbus */
331 if (phy->index == 0 && sun4i_usb_phy0_have_vbus_det(data) &&
332 data->vbus_det)
333 return 0;
334
335 ret = regulator_enable(phy->vbus);
336 if (ret)
337 return ret;
338
339 phy->regulator_on = true;
340
341 /* We must report Vbus high within OTG_TIME_A_WAIT_VRISE msec. */
342 if (phy->index == 0 && data->vbus_det_gpio && data->phy0_poll)
343 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
344
345 return 0;
346 }
347
sun4i_usb_phy_power_off(struct phy * _phy)348 static int sun4i_usb_phy_power_off(struct phy *_phy)
349 {
350 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
351 struct sun4i_usb_phy_data *data = to_sun4i_usb_phy_data(phy);
352
353 if (!phy->vbus || !phy->regulator_on)
354 return 0;
355
356 regulator_disable(phy->vbus);
357 phy->regulator_on = false;
358
359 /*
360 * phy0 vbus typically slowly discharges, sometimes this causes the
361 * Vbus gpio to not trigger an edge irq on Vbus off, so force a rescan.
362 */
363 if (phy->index == 0 && data->vbus_det_gpio && !data->phy0_poll)
364 mod_delayed_work(system_wq, &data->detect, POLL_TIME);
365
366 return 0;
367 }
368
sun4i_usb_phy_set_squelch_detect(struct phy * _phy,bool enabled)369 void sun4i_usb_phy_set_squelch_detect(struct phy *_phy, bool enabled)
370 {
371 struct sun4i_usb_phy *phy = phy_get_drvdata(_phy);
372
373 sun4i_usb_phy_write(phy, PHY_SQUELCH_DETECT, enabled ? 0 : 2, 2);
374 }
375 EXPORT_SYMBOL_GPL(sun4i_usb_phy_set_squelch_detect);
376
377 static const struct phy_ops sun4i_usb_phy_ops = {
378 .init = sun4i_usb_phy_init,
379 .exit = sun4i_usb_phy_exit,
380 .power_on = sun4i_usb_phy_power_on,
381 .power_off = sun4i_usb_phy_power_off,
382 .owner = THIS_MODULE,
383 };
384
sun4i_usb_phy0_id_vbus_det_scan(struct work_struct * work)385 static void sun4i_usb_phy0_id_vbus_det_scan(struct work_struct *work)
386 {
387 struct sun4i_usb_phy_data *data =
388 container_of(work, struct sun4i_usb_phy_data, detect.work);
389 struct phy *phy0 = data->phys[0].phy;
390 int id_det, vbus_det, id_notify = 0, vbus_notify = 0;
391
392 id_det = gpiod_get_value_cansleep(data->id_det_gpio);
393 vbus_det = sun4i_usb_phy0_get_vbus_det(data);
394
395 mutex_lock(&phy0->mutex);
396
397 if (!data->phy0_init) {
398 mutex_unlock(&phy0->mutex);
399 return;
400 }
401
402 if (id_det != data->id_det) {
403 /*
404 * When a host cable (id == 0) gets plugged in on systems
405 * without vbus detection report vbus low for long enough for
406 * the musb-ip to end the current device session.
407 */
408 if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 0) {
409 sun4i_usb_phy0_set_vbus_detect(phy0, 0);
410 msleep(200);
411 sun4i_usb_phy0_set_vbus_detect(phy0, 1);
412 }
413 sun4i_usb_phy0_set_id_detect(phy0, id_det);
414 data->id_det = id_det;
415 id_notify = 1;
416 }
417
418 if (vbus_det != data->vbus_det) {
419 sun4i_usb_phy0_set_vbus_detect(phy0, vbus_det);
420 data->vbus_det = vbus_det;
421 vbus_notify = 1;
422 }
423
424 mutex_unlock(&phy0->mutex);
425
426 if (id_notify) {
427 extcon_set_cable_state_(data->extcon, EXTCON_USB_HOST,
428 !id_det);
429 /*
430 * When a host cable gets unplugged (id == 1) on systems
431 * without vbus detection report vbus low for long enough to
432 * the musb-ip to end the current host session.
433 */
434 if (!sun4i_usb_phy0_have_vbus_det(data) && id_det == 1) {
435 mutex_lock(&phy0->mutex);
436 sun4i_usb_phy0_set_vbus_detect(phy0, 0);
437 msleep(1000);
438 sun4i_usb_phy0_set_vbus_detect(phy0, 1);
439 mutex_unlock(&phy0->mutex);
440 }
441 }
442
443 if (vbus_notify)
444 extcon_set_cable_state_(data->extcon, EXTCON_USB, vbus_det);
445
446 if (data->phy0_poll)
447 queue_delayed_work(system_wq, &data->detect, POLL_TIME);
448 }
449
sun4i_usb_phy0_id_vbus_det_irq(int irq,void * dev_id)450 static irqreturn_t sun4i_usb_phy0_id_vbus_det_irq(int irq, void *dev_id)
451 {
452 struct sun4i_usb_phy_data *data = dev_id;
453
454 /* vbus or id changed, let the pins settle and then scan them */
455 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
456
457 return IRQ_HANDLED;
458 }
459
sun4i_usb_phy0_vbus_notify(struct notifier_block * nb,unsigned long val,void * v)460 static int sun4i_usb_phy0_vbus_notify(struct notifier_block *nb,
461 unsigned long val, void *v)
462 {
463 struct sun4i_usb_phy_data *data =
464 container_of(nb, struct sun4i_usb_phy_data, vbus_power_nb);
465 struct power_supply *psy = v;
466
467 /* Properties on the vbus_power_supply changed, scan vbus_det */
468 if (val == PSY_EVENT_PROP_CHANGED && psy == data->vbus_power_supply)
469 mod_delayed_work(system_wq, &data->detect, DEBOUNCE_TIME);
470
471 return NOTIFY_OK;
472 }
473
sun4i_usb_phy_xlate(struct device * dev,struct of_phandle_args * args)474 static struct phy *sun4i_usb_phy_xlate(struct device *dev,
475 struct of_phandle_args *args)
476 {
477 struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
478
479 if (args->args[0] >= data->num_phys)
480 return ERR_PTR(-ENODEV);
481
482 return data->phys[args->args[0]].phy;
483 }
484
sun4i_usb_phy_remove(struct platform_device * pdev)485 static int sun4i_usb_phy_remove(struct platform_device *pdev)
486 {
487 struct device *dev = &pdev->dev;
488 struct sun4i_usb_phy_data *data = dev_get_drvdata(dev);
489
490 if (data->vbus_power_nb_registered)
491 power_supply_unreg_notifier(&data->vbus_power_nb);
492 if (data->id_det_irq >= 0)
493 devm_free_irq(dev, data->id_det_irq, data);
494 if (data->vbus_det_irq >= 0)
495 devm_free_irq(dev, data->vbus_det_irq, data);
496
497 cancel_delayed_work_sync(&data->detect);
498
499 return 0;
500 }
501
502 static const unsigned int sun4i_usb_phy0_cable[] = {
503 EXTCON_USB,
504 EXTCON_USB_HOST,
505 EXTCON_NONE,
506 };
507
sun4i_usb_phy_probe(struct platform_device * pdev)508 static int sun4i_usb_phy_probe(struct platform_device *pdev)
509 {
510 struct sun4i_usb_phy_data *data;
511 struct device *dev = &pdev->dev;
512 struct device_node *np = dev->of_node;
513 struct phy_provider *phy_provider;
514 bool dedicated_clocks;
515 struct resource *res;
516 int i, ret;
517
518 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
519 if (!data)
520 return -ENOMEM;
521
522 mutex_init(&data->mutex);
523 INIT_DELAYED_WORK(&data->detect, sun4i_usb_phy0_id_vbus_det_scan);
524 dev_set_drvdata(dev, data);
525
526 if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") ||
527 of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
528 of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
529 data->num_phys = 2;
530 else
531 data->num_phys = 3;
532
533 if (of_device_is_compatible(np, "allwinner,sun5i-a13-usb-phy") ||
534 of_device_is_compatible(np, "allwinner,sun7i-a20-usb-phy"))
535 data->disc_thresh = 2;
536 else
537 data->disc_thresh = 3;
538
539 if (of_device_is_compatible(np, "allwinner,sun6i-a31-usb-phy") ||
540 of_device_is_compatible(np, "allwinner,sun8i-a23-usb-phy") ||
541 of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
542 dedicated_clocks = true;
543 else
544 dedicated_clocks = false;
545
546 if (of_device_is_compatible(np, "allwinner,sun8i-a33-usb-phy"))
547 data->has_a33_phyctl = true;
548
549 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "phy_ctrl");
550 data->base = devm_ioremap_resource(dev, res);
551 if (IS_ERR(data->base))
552 return PTR_ERR(data->base);
553
554 data->id_det_gpio = devm_gpiod_get_optional(dev, "usb0_id_det",
555 GPIOD_IN);
556 if (IS_ERR(data->id_det_gpio))
557 return PTR_ERR(data->id_det_gpio);
558
559 data->vbus_det_gpio = devm_gpiod_get_optional(dev, "usb0_vbus_det",
560 GPIOD_IN);
561 if (IS_ERR(data->vbus_det_gpio))
562 return PTR_ERR(data->vbus_det_gpio);
563
564 if (of_find_property(np, "usb0_vbus_power-supply", NULL)) {
565 data->vbus_power_supply = devm_power_supply_get_by_phandle(dev,
566 "usb0_vbus_power-supply");
567 if (IS_ERR(data->vbus_power_supply))
568 return PTR_ERR(data->vbus_power_supply);
569
570 if (!data->vbus_power_supply)
571 return -EPROBE_DEFER;
572 }
573
574 /* vbus_det without id_det makes no sense, and is not supported */
575 if (sun4i_usb_phy0_have_vbus_det(data) && !data->id_det_gpio) {
576 dev_err(dev, "usb0_id_det missing or invalid\n");
577 return -ENODEV;
578 }
579
580 if (data->id_det_gpio) {
581 data->extcon = devm_extcon_dev_allocate(dev,
582 sun4i_usb_phy0_cable);
583 if (IS_ERR(data->extcon))
584 return PTR_ERR(data->extcon);
585
586 ret = devm_extcon_dev_register(dev, data->extcon);
587 if (ret) {
588 dev_err(dev, "failed to register extcon: %d\n", ret);
589 return ret;
590 }
591 }
592
593 for (i = 0; i < data->num_phys; i++) {
594 struct sun4i_usb_phy *phy = data->phys + i;
595 char name[16];
596
597 snprintf(name, sizeof(name), "usb%d_vbus", i);
598 phy->vbus = devm_regulator_get_optional(dev, name);
599 if (IS_ERR(phy->vbus)) {
600 if (PTR_ERR(phy->vbus) == -EPROBE_DEFER)
601 return -EPROBE_DEFER;
602 phy->vbus = NULL;
603 }
604
605 if (dedicated_clocks)
606 snprintf(name, sizeof(name), "usb%d_phy", i);
607 else
608 strlcpy(name, "usb_phy", sizeof(name));
609
610 phy->clk = devm_clk_get(dev, name);
611 if (IS_ERR(phy->clk)) {
612 dev_err(dev, "failed to get clock %s\n", name);
613 return PTR_ERR(phy->clk);
614 }
615
616 snprintf(name, sizeof(name), "usb%d_reset", i);
617 phy->reset = devm_reset_control_get(dev, name);
618 if (IS_ERR(phy->reset)) {
619 dev_err(dev, "failed to get reset %s\n", name);
620 return PTR_ERR(phy->reset);
621 }
622
623 if (i) { /* No pmu for usbc0 */
624 snprintf(name, sizeof(name), "pmu%d", i);
625 res = platform_get_resource_byname(pdev,
626 IORESOURCE_MEM, name);
627 phy->pmu = devm_ioremap_resource(dev, res);
628 if (IS_ERR(phy->pmu))
629 return PTR_ERR(phy->pmu);
630 }
631
632 phy->phy = devm_phy_create(dev, NULL, &sun4i_usb_phy_ops);
633 if (IS_ERR(phy->phy)) {
634 dev_err(dev, "failed to create PHY %d\n", i);
635 return PTR_ERR(phy->phy);
636 }
637
638 phy->index = i;
639 phy_set_drvdata(phy->phy, &data->phys[i]);
640 }
641
642 data->id_det_irq = gpiod_to_irq(data->id_det_gpio);
643 data->vbus_det_irq = gpiod_to_irq(data->vbus_det_gpio);
644 if ((data->id_det_gpio && data->id_det_irq < 0) ||
645 (data->vbus_det_gpio && data->vbus_det_irq < 0))
646 data->phy0_poll = true;
647
648 if (data->id_det_irq >= 0) {
649 ret = devm_request_irq(dev, data->id_det_irq,
650 sun4i_usb_phy0_id_vbus_det_irq,
651 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
652 "usb0-id-det", data);
653 if (ret) {
654 dev_err(dev, "Err requesting id-det-irq: %d\n", ret);
655 return ret;
656 }
657 }
658
659 if (data->vbus_det_irq >= 0) {
660 ret = devm_request_irq(dev, data->vbus_det_irq,
661 sun4i_usb_phy0_id_vbus_det_irq,
662 IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING,
663 "usb0-vbus-det", data);
664 if (ret) {
665 dev_err(dev, "Err requesting vbus-det-irq: %d\n", ret);
666 data->vbus_det_irq = -1;
667 sun4i_usb_phy_remove(pdev); /* Stop detect work */
668 return ret;
669 }
670 }
671
672 if (data->vbus_power_supply) {
673 data->vbus_power_nb.notifier_call = sun4i_usb_phy0_vbus_notify;
674 data->vbus_power_nb.priority = 0;
675 ret = power_supply_reg_notifier(&data->vbus_power_nb);
676 if (ret) {
677 sun4i_usb_phy_remove(pdev); /* Stop detect work */
678 return ret;
679 }
680 data->vbus_power_nb_registered = true;
681 }
682
683 phy_provider = devm_of_phy_provider_register(dev, sun4i_usb_phy_xlate);
684 if (IS_ERR(phy_provider)) {
685 sun4i_usb_phy_remove(pdev); /* Stop detect work */
686 return PTR_ERR(phy_provider);
687 }
688
689 return 0;
690 }
691
692 static const struct of_device_id sun4i_usb_phy_of_match[] = {
693 { .compatible = "allwinner,sun4i-a10-usb-phy" },
694 { .compatible = "allwinner,sun5i-a13-usb-phy" },
695 { .compatible = "allwinner,sun6i-a31-usb-phy" },
696 { .compatible = "allwinner,sun7i-a20-usb-phy" },
697 { .compatible = "allwinner,sun8i-a23-usb-phy" },
698 { .compatible = "allwinner,sun8i-a33-usb-phy" },
699 { },
700 };
701 MODULE_DEVICE_TABLE(of, sun4i_usb_phy_of_match);
702
703 static struct platform_driver sun4i_usb_phy_driver = {
704 .probe = sun4i_usb_phy_probe,
705 .remove = sun4i_usb_phy_remove,
706 .driver = {
707 .of_match_table = sun4i_usb_phy_of_match,
708 .name = "sun4i-usb-phy",
709 }
710 };
711 module_platform_driver(sun4i_usb_phy_driver);
712
713 MODULE_DESCRIPTION("Allwinner sun4i USB phy driver");
714 MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
715 MODULE_LICENSE("GPL v2");
716