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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Renesas R-Car Gen3 for USB2.0 PHY driver
4 *
5 * Copyright (C) 2015-2017 Renesas Electronics Corporation
6 *
7 * This is based on the phy-rcar-gen2 driver:
8 * Copyright (C) 2014 Renesas Solutions Corp.
9 * Copyright (C) 2014 Cogent Embedded, Inc.
10 */
11
12#include <linux/extcon-provider.h>
13#include <linux/interrupt.h>
14#include <linux/io.h>
15#include <linux/module.h>
16#include <linux/mutex.h>
17#include <linux/of.h>
18#include <linux/of_address.h>
19#include <linux/of_device.h>
20#include <linux/phy/phy.h>
21#include <linux/platform_device.h>
22#include <linux/pm_runtime.h>
23#include <linux/regulator/consumer.h>
24#include <linux/string.h>
25#include <linux/usb/of.h>
26#include <linux/workqueue.h>
27
28/******* USB2.0 Host registers (original offset is +0x200) *******/
29#define USB2_INT_ENABLE 0x000
30#define USB2_USBCTR 0x00c
31#define USB2_SPD_RSM_TIMSET 0x10c
32#define USB2_OC_TIMSET 0x110
33#define USB2_COMMCTRL 0x600
34#define USB2_OBINTSTA 0x604
35#define USB2_OBINTEN 0x608
36#define USB2_VBCTRL 0x60c
37#define USB2_LINECTRL1 0x610
38#define USB2_ADPCTRL 0x630
39
40/* INT_ENABLE */
41#define USB2_INT_ENABLE_UCOM_INTEN BIT(3)
42#define USB2_INT_ENABLE_USBH_INTB_EN BIT(2) /* For EHCI */
43#define USB2_INT_ENABLE_USBH_INTA_EN BIT(1) /* For OHCI */
44
45/* USBCTR */
46#define USB2_USBCTR_DIRPD BIT(2)
47#define USB2_USBCTR_PLL_RST BIT(1)
48
49/* SPD_RSM_TIMSET */
50#define USB2_SPD_RSM_TIMSET_INIT 0x014e029b
51
52/* OC_TIMSET */
53#define USB2_OC_TIMSET_INIT 0x000209ab
54
55/* COMMCTRL */
56#define USB2_COMMCTRL_OTG_PERI BIT(31) /* 1 = Peripheral mode */
57
58/* OBINTSTA and OBINTEN */
59#define USB2_OBINT_SESSVLDCHG BIT(12)
60#define USB2_OBINT_IDDIGCHG BIT(11)
61#define USB2_OBINT_BITS (USB2_OBINT_SESSVLDCHG | \
62 USB2_OBINT_IDDIGCHG)
63
64/* VBCTRL */
65#define USB2_VBCTRL_OCCLREN BIT(16)
66#define USB2_VBCTRL_DRVVBUSSEL BIT(8)
67#define USB2_VBCTRL_VBOUT BIT(0)
68
69/* LINECTRL1 */
70#define USB2_LINECTRL1_DPRPD_EN BIT(19)
71#define USB2_LINECTRL1_DP_RPD BIT(18)
72#define USB2_LINECTRL1_DMRPD_EN BIT(17)
73#define USB2_LINECTRL1_DM_RPD BIT(16)
74#define USB2_LINECTRL1_OPMODE_NODRV BIT(6)
75
76/* ADPCTRL */
77#define USB2_ADPCTRL_OTGSESSVLD BIT(20)
78#define USB2_ADPCTRL_IDDIG BIT(19)
79#define USB2_ADPCTRL_IDPULLUP BIT(5) /* 1 = ID sampling is enabled */
80#define USB2_ADPCTRL_DRVVBUS BIT(4)
81
82/* RZ/G2L specific */
83#define USB2_OBINT_IDCHG_EN BIT(0)
84#define USB2_LINECTRL1_USB2_IDMON BIT(0)
85
86#define NUM_OF_PHYS 4
87enum rcar_gen3_phy_index {
88 PHY_INDEX_BOTH_HC,
89 PHY_INDEX_OHCI,
90 PHY_INDEX_EHCI,
91 PHY_INDEX_HSUSB
92};
93
94static const u32 rcar_gen3_int_enable[NUM_OF_PHYS] = {
95 USB2_INT_ENABLE_USBH_INTB_EN | USB2_INT_ENABLE_USBH_INTA_EN,
96 USB2_INT_ENABLE_USBH_INTA_EN,
97 USB2_INT_ENABLE_USBH_INTB_EN,
98 0
99};
100
101struct rcar_gen3_phy {
102 struct phy *phy;
103 struct rcar_gen3_chan *ch;
104 u32 int_enable_bits;
105 bool initialized;
106 bool otg_initialized;
107 bool powered;
108};
109
110struct rcar_gen3_chan {
111 void __iomem *base;
112 struct device *dev; /* platform_device's device */
113 struct extcon_dev *extcon;
114 struct rcar_gen3_phy rphys[NUM_OF_PHYS];
115 struct regulator *vbus;
116 struct work_struct work;
117 struct mutex lock; /* protects rphys[...].powered */
118 enum usb_dr_mode dr_mode;
119 int irq;
120 u32 obint_enable_bits;
121 bool extcon_host;
122 bool is_otg_channel;
123 bool uses_otg_pins;
124 bool soc_no_adp_ctrl;
125};
126
127struct rcar_gen3_phy_drv_data {
128 const struct phy_ops *phy_usb2_ops;
129 bool no_adp_ctrl;
130};
131
132/*
133 * Combination about is_otg_channel and uses_otg_pins:
134 *
135 * Parameters || Behaviors
136 * is_otg_channel | uses_otg_pins || irqs | role sysfs
137 * ---------------------+---------------++--------------+------------
138 * true | true || enabled | enabled
139 * true | false || disabled | enabled
140 * false | any || disabled | disabled
141 */
142
143static void rcar_gen3_phy_usb2_work(struct work_struct *work)
144{
145 struct rcar_gen3_chan *ch = container_of(work, struct rcar_gen3_chan,
146 work);
147
148 if (ch->extcon_host) {
149 extcon_set_state_sync(ch->extcon, EXTCON_USB_HOST, true);
150 extcon_set_state_sync(ch->extcon, EXTCON_USB, false);
151 } else {
152 extcon_set_state_sync(ch->extcon, EXTCON_USB_HOST, false);
153 extcon_set_state_sync(ch->extcon, EXTCON_USB, true);
154 }
155}
156
157static void rcar_gen3_set_host_mode(struct rcar_gen3_chan *ch, int host)
158{
159 void __iomem *usb2_base = ch->base;
160 u32 val = readl(usb2_base + USB2_COMMCTRL);
161
162 dev_vdbg(ch->dev, "%s: %08x, %d\n", __func__, val, host);
163 if (host)
164 val &= ~USB2_COMMCTRL_OTG_PERI;
165 else
166 val |= USB2_COMMCTRL_OTG_PERI;
167 writel(val, usb2_base + USB2_COMMCTRL);
168}
169
170static void rcar_gen3_set_linectrl(struct rcar_gen3_chan *ch, int dp, int dm)
171{
172 void __iomem *usb2_base = ch->base;
173 u32 val = readl(usb2_base + USB2_LINECTRL1);
174
175 dev_vdbg(ch->dev, "%s: %08x, %d, %d\n", __func__, val, dp, dm);
176 val &= ~(USB2_LINECTRL1_DP_RPD | USB2_LINECTRL1_DM_RPD);
177 if (dp)
178 val |= USB2_LINECTRL1_DP_RPD;
179 if (dm)
180 val |= USB2_LINECTRL1_DM_RPD;
181 writel(val, usb2_base + USB2_LINECTRL1);
182}
183
184static void rcar_gen3_enable_vbus_ctrl(struct rcar_gen3_chan *ch, int vbus)
185{
186 void __iomem *usb2_base = ch->base;
187 u32 vbus_ctrl_reg = USB2_ADPCTRL;
188 u32 vbus_ctrl_val = USB2_ADPCTRL_DRVVBUS;
189 u32 val;
190
191 dev_vdbg(ch->dev, "%s: %08x, %d\n", __func__, val, vbus);
192 if (ch->soc_no_adp_ctrl) {
193 vbus_ctrl_reg = USB2_VBCTRL;
194 vbus_ctrl_val = USB2_VBCTRL_VBOUT;
195 }
196
197 val = readl(usb2_base + vbus_ctrl_reg);
198 if (vbus)
199 val |= vbus_ctrl_val;
200 else
201 val &= ~vbus_ctrl_val;
202 writel(val, usb2_base + vbus_ctrl_reg);
203}
204
205static void rcar_gen3_control_otg_irq(struct rcar_gen3_chan *ch, int enable)
206{
207 void __iomem *usb2_base = ch->base;
208 u32 val = readl(usb2_base + USB2_OBINTEN);
209
210 if (ch->uses_otg_pins && enable)
211 val |= ch->obint_enable_bits;
212 else
213 val &= ~ch->obint_enable_bits;
214 writel(val, usb2_base + USB2_OBINTEN);
215}
216
217static void rcar_gen3_init_for_host(struct rcar_gen3_chan *ch)
218{
219 rcar_gen3_set_linectrl(ch, 1, 1);
220 rcar_gen3_set_host_mode(ch, 1);
221 rcar_gen3_enable_vbus_ctrl(ch, 1);
222
223 ch->extcon_host = true;
224 schedule_work(&ch->work);
225}
226
227static void rcar_gen3_init_for_peri(struct rcar_gen3_chan *ch)
228{
229 rcar_gen3_set_linectrl(ch, 0, 1);
230 rcar_gen3_set_host_mode(ch, 0);
231 rcar_gen3_enable_vbus_ctrl(ch, 0);
232
233 ch->extcon_host = false;
234 schedule_work(&ch->work);
235}
236
237static void rcar_gen3_init_for_b_host(struct rcar_gen3_chan *ch)
238{
239 void __iomem *usb2_base = ch->base;
240 u32 val;
241
242 val = readl(usb2_base + USB2_LINECTRL1);
243 writel(val | USB2_LINECTRL1_OPMODE_NODRV, usb2_base + USB2_LINECTRL1);
244
245 rcar_gen3_set_linectrl(ch, 1, 1);
246 rcar_gen3_set_host_mode(ch, 1);
247 rcar_gen3_enable_vbus_ctrl(ch, 0);
248
249 val = readl(usb2_base + USB2_LINECTRL1);
250 writel(val & ~USB2_LINECTRL1_OPMODE_NODRV, usb2_base + USB2_LINECTRL1);
251}
252
253static void rcar_gen3_init_for_a_peri(struct rcar_gen3_chan *ch)
254{
255 rcar_gen3_set_linectrl(ch, 0, 1);
256 rcar_gen3_set_host_mode(ch, 0);
257 rcar_gen3_enable_vbus_ctrl(ch, 1);
258}
259
260static void rcar_gen3_init_from_a_peri_to_a_host(struct rcar_gen3_chan *ch)
261{
262 rcar_gen3_control_otg_irq(ch, 0);
263
264 rcar_gen3_enable_vbus_ctrl(ch, 1);
265 rcar_gen3_init_for_host(ch);
266
267 rcar_gen3_control_otg_irq(ch, 1);
268}
269
270static bool rcar_gen3_check_id(struct rcar_gen3_chan *ch)
271{
272 if (!ch->uses_otg_pins)
273 return (ch->dr_mode == USB_DR_MODE_HOST) ? false : true;
274
275 if (ch->soc_no_adp_ctrl)
276 return !!(readl(ch->base + USB2_LINECTRL1) & USB2_LINECTRL1_USB2_IDMON);
277
278 return !!(readl(ch->base + USB2_ADPCTRL) & USB2_ADPCTRL_IDDIG);
279}
280
281static void rcar_gen3_device_recognition(struct rcar_gen3_chan *ch)
282{
283 if (!rcar_gen3_check_id(ch))
284 rcar_gen3_init_for_host(ch);
285 else
286 rcar_gen3_init_for_peri(ch);
287}
288
289static bool rcar_gen3_is_host(struct rcar_gen3_chan *ch)
290{
291 return !(readl(ch->base + USB2_COMMCTRL) & USB2_COMMCTRL_OTG_PERI);
292}
293
294static enum phy_mode rcar_gen3_get_phy_mode(struct rcar_gen3_chan *ch)
295{
296 if (rcar_gen3_is_host(ch))
297 return PHY_MODE_USB_HOST;
298
299 return PHY_MODE_USB_DEVICE;
300}
301
302static bool rcar_gen3_is_any_rphy_initialized(struct rcar_gen3_chan *ch)
303{
304 int i;
305
306 for (i = 0; i < NUM_OF_PHYS; i++) {
307 if (ch->rphys[i].initialized)
308 return true;
309 }
310
311 return false;
312}
313
314static bool rcar_gen3_needs_init_otg(struct rcar_gen3_chan *ch)
315{
316 int i;
317
318 for (i = 0; i < NUM_OF_PHYS; i++) {
319 if (ch->rphys[i].otg_initialized)
320 return false;
321 }
322
323 return true;
324}
325
326static bool rcar_gen3_are_all_rphys_power_off(struct rcar_gen3_chan *ch)
327{
328 int i;
329
330 for (i = 0; i < NUM_OF_PHYS; i++) {
331 if (ch->rphys[i].powered)
332 return false;
333 }
334
335 return true;
336}
337
338static ssize_t role_store(struct device *dev, struct device_attribute *attr,
339 const char *buf, size_t count)
340{
341 struct rcar_gen3_chan *ch = dev_get_drvdata(dev);
342 bool is_b_device;
343 enum phy_mode cur_mode, new_mode;
344
345 if (!ch->is_otg_channel || !rcar_gen3_is_any_rphy_initialized(ch))
346 return -EIO;
347
348 if (sysfs_streq(buf, "host"))
349 new_mode = PHY_MODE_USB_HOST;
350 else if (sysfs_streq(buf, "peripheral"))
351 new_mode = PHY_MODE_USB_DEVICE;
352 else
353 return -EINVAL;
354
355 /* is_b_device: true is B-Device. false is A-Device. */
356 is_b_device = rcar_gen3_check_id(ch);
357 cur_mode = rcar_gen3_get_phy_mode(ch);
358
359 /* If current and new mode is the same, this returns the error */
360 if (cur_mode == new_mode)
361 return -EINVAL;
362
363 if (new_mode == PHY_MODE_USB_HOST) { /* And is_host must be false */
364 if (!is_b_device) /* A-Peripheral */
365 rcar_gen3_init_from_a_peri_to_a_host(ch);
366 else /* B-Peripheral */
367 rcar_gen3_init_for_b_host(ch);
368 } else { /* And is_host must be true */
369 if (!is_b_device) /* A-Host */
370 rcar_gen3_init_for_a_peri(ch);
371 else /* B-Host */
372 rcar_gen3_init_for_peri(ch);
373 }
374
375 return count;
376}
377
378static ssize_t role_show(struct device *dev, struct device_attribute *attr,
379 char *buf)
380{
381 struct rcar_gen3_chan *ch = dev_get_drvdata(dev);
382
383 if (!ch->is_otg_channel || !rcar_gen3_is_any_rphy_initialized(ch))
384 return -EIO;
385
386 return sprintf(buf, "%s\n", rcar_gen3_is_host(ch) ? "host" :
387 "peripheral");
388}
389static DEVICE_ATTR_RW(role);
390
391static void rcar_gen3_init_otg(struct rcar_gen3_chan *ch)
392{
393 void __iomem *usb2_base = ch->base;
394 u32 val;
395
396 /* Should not use functions of read-modify-write a register */
397 val = readl(usb2_base + USB2_LINECTRL1);
398 val = (val & ~USB2_LINECTRL1_DP_RPD) | USB2_LINECTRL1_DPRPD_EN |
399 USB2_LINECTRL1_DMRPD_EN | USB2_LINECTRL1_DM_RPD;
400 writel(val, usb2_base + USB2_LINECTRL1);
401
402 if (!ch->soc_no_adp_ctrl) {
403 val = readl(usb2_base + USB2_VBCTRL);
404 val &= ~USB2_VBCTRL_OCCLREN;
405 writel(val | USB2_VBCTRL_DRVVBUSSEL, usb2_base + USB2_VBCTRL);
406 val = readl(usb2_base + USB2_ADPCTRL);
407 writel(val | USB2_ADPCTRL_IDPULLUP, usb2_base + USB2_ADPCTRL);
408 }
409 msleep(20);
410
411 writel(0xffffffff, usb2_base + USB2_OBINTSTA);
412 writel(ch->obint_enable_bits, usb2_base + USB2_OBINTEN);
413
414 rcar_gen3_device_recognition(ch);
415}
416
417static irqreturn_t rcar_gen3_phy_usb2_irq(int irq, void *_ch)
418{
419 struct rcar_gen3_chan *ch = _ch;
420 void __iomem *usb2_base = ch->base;
421 u32 status = readl(usb2_base + USB2_OBINTSTA);
422 irqreturn_t ret = IRQ_NONE;
423
424 if (status & ch->obint_enable_bits) {
425 dev_vdbg(ch->dev, "%s: %08x\n", __func__, status);
426 writel(ch->obint_enable_bits, usb2_base + USB2_OBINTSTA);
427 rcar_gen3_device_recognition(ch);
428 ret = IRQ_HANDLED;
429 }
430
431 return ret;
432}
433
434static int rcar_gen3_phy_usb2_init(struct phy *p)
435{
436 struct rcar_gen3_phy *rphy = phy_get_drvdata(p);
437 struct rcar_gen3_chan *channel = rphy->ch;
438 void __iomem *usb2_base = channel->base;
439 u32 val;
440 int ret;
441
442 if (!rcar_gen3_is_any_rphy_initialized(channel) && channel->irq >= 0) {
443 INIT_WORK(&channel->work, rcar_gen3_phy_usb2_work);
444 ret = request_irq(channel->irq, rcar_gen3_phy_usb2_irq,
445 IRQF_SHARED, dev_name(channel->dev), channel);
446 if (ret < 0) {
447 dev_err(channel->dev, "No irq handler (%d)\n", channel->irq);
448 return ret;
449 }
450 }
451
452 /* Initialize USB2 part */
453 val = readl(usb2_base + USB2_INT_ENABLE);
454 val |= USB2_INT_ENABLE_UCOM_INTEN | rphy->int_enable_bits;
455 writel(val, usb2_base + USB2_INT_ENABLE);
456 writel(USB2_SPD_RSM_TIMSET_INIT, usb2_base + USB2_SPD_RSM_TIMSET);
457 writel(USB2_OC_TIMSET_INIT, usb2_base + USB2_OC_TIMSET);
458
459 /* Initialize otg part */
460 if (channel->is_otg_channel) {
461 if (rcar_gen3_needs_init_otg(channel))
462 rcar_gen3_init_otg(channel);
463 rphy->otg_initialized = true;
464 }
465
466 rphy->initialized = true;
467
468 return 0;
469}
470
471static int rcar_gen3_phy_usb2_exit(struct phy *p)
472{
473 struct rcar_gen3_phy *rphy = phy_get_drvdata(p);
474 struct rcar_gen3_chan *channel = rphy->ch;
475 void __iomem *usb2_base = channel->base;
476 u32 val;
477
478 rphy->initialized = false;
479
480 if (channel->is_otg_channel)
481 rphy->otg_initialized = false;
482
483 val = readl(usb2_base + USB2_INT_ENABLE);
484 val &= ~rphy->int_enable_bits;
485 if (!rcar_gen3_is_any_rphy_initialized(channel))
486 val &= ~USB2_INT_ENABLE_UCOM_INTEN;
487 writel(val, usb2_base + USB2_INT_ENABLE);
488
489 if (channel->irq >= 0 && !rcar_gen3_is_any_rphy_initialized(channel))
490 free_irq(channel->irq, channel);
491
492 return 0;
493}
494
495static int rcar_gen3_phy_usb2_power_on(struct phy *p)
496{
497 struct rcar_gen3_phy *rphy = phy_get_drvdata(p);
498 struct rcar_gen3_chan *channel = rphy->ch;
499 void __iomem *usb2_base = channel->base;
500 u32 val;
501 int ret = 0;
502
503 mutex_lock(&channel->lock);
504 if (!rcar_gen3_are_all_rphys_power_off(channel))
505 goto out;
506
507 if (channel->vbus) {
508 ret = regulator_enable(channel->vbus);
509 if (ret)
510 goto out;
511 }
512
513 val = readl(usb2_base + USB2_USBCTR);
514 val |= USB2_USBCTR_PLL_RST;
515 writel(val, usb2_base + USB2_USBCTR);
516 val &= ~USB2_USBCTR_PLL_RST;
517 writel(val, usb2_base + USB2_USBCTR);
518
519out:
520 /* The powered flag should be set for any other phys anyway */
521 rphy->powered = true;
522 mutex_unlock(&channel->lock);
523
524 return 0;
525}
526
527static int rcar_gen3_phy_usb2_power_off(struct phy *p)
528{
529 struct rcar_gen3_phy *rphy = phy_get_drvdata(p);
530 struct rcar_gen3_chan *channel = rphy->ch;
531 int ret = 0;
532
533 mutex_lock(&channel->lock);
534 rphy->powered = false;
535
536 if (!rcar_gen3_are_all_rphys_power_off(channel))
537 goto out;
538
539 if (channel->vbus)
540 ret = regulator_disable(channel->vbus);
541
542out:
543 mutex_unlock(&channel->lock);
544
545 return ret;
546}
547
548static const struct phy_ops rcar_gen3_phy_usb2_ops = {
549 .init = rcar_gen3_phy_usb2_init,
550 .exit = rcar_gen3_phy_usb2_exit,
551 .power_on = rcar_gen3_phy_usb2_power_on,
552 .power_off = rcar_gen3_phy_usb2_power_off,
553 .owner = THIS_MODULE,
554};
555
556static const struct phy_ops rz_g1c_phy_usb2_ops = {
557 .init = rcar_gen3_phy_usb2_init,
558 .exit = rcar_gen3_phy_usb2_exit,
559 .owner = THIS_MODULE,
560};
561
562static const struct rcar_gen3_phy_drv_data rcar_gen3_phy_usb2_data = {
563 .phy_usb2_ops = &rcar_gen3_phy_usb2_ops,
564 .no_adp_ctrl = false,
565};
566
567static const struct rcar_gen3_phy_drv_data rz_g1c_phy_usb2_data = {
568 .phy_usb2_ops = &rz_g1c_phy_usb2_ops,
569 .no_adp_ctrl = false,
570};
571
572static const struct rcar_gen3_phy_drv_data rz_g2l_phy_usb2_data = {
573 .phy_usb2_ops = &rcar_gen3_phy_usb2_ops,
574 .no_adp_ctrl = true,
575};
576
577static const struct of_device_id rcar_gen3_phy_usb2_match_table[] = {
578 {
579 .compatible = "renesas,usb2-phy-r8a77470",
580 .data = &rz_g1c_phy_usb2_data,
581 },
582 {
583 .compatible = "renesas,usb2-phy-r8a7795",
584 .data = &rcar_gen3_phy_usb2_data,
585 },
586 {
587 .compatible = "renesas,usb2-phy-r8a7796",
588 .data = &rcar_gen3_phy_usb2_data,
589 },
590 {
591 .compatible = "renesas,usb2-phy-r8a77965",
592 .data = &rcar_gen3_phy_usb2_data,
593 },
594 {
595 .compatible = "renesas,rzg2l-usb2-phy",
596 .data = &rz_g2l_phy_usb2_data,
597 },
598 {
599 .compatible = "renesas,rcar-gen3-usb2-phy",
600 .data = &rcar_gen3_phy_usb2_data,
601 },
602 { /* sentinel */ },
603};
604MODULE_DEVICE_TABLE(of, rcar_gen3_phy_usb2_match_table);
605
606static const unsigned int rcar_gen3_phy_cable[] = {
607 EXTCON_USB,
608 EXTCON_USB_HOST,
609 EXTCON_NONE,
610};
611
612static struct phy *rcar_gen3_phy_usb2_xlate(struct device *dev,
613 struct of_phandle_args *args)
614{
615 struct rcar_gen3_chan *ch = dev_get_drvdata(dev);
616
617 if (args->args_count == 0) /* For old version dts */
618 return ch->rphys[PHY_INDEX_BOTH_HC].phy;
619 else if (args->args_count > 1) /* Prevent invalid args count */
620 return ERR_PTR(-ENODEV);
621
622 if (args->args[0] >= NUM_OF_PHYS)
623 return ERR_PTR(-ENODEV);
624
625 return ch->rphys[args->args[0]].phy;
626}
627
628static enum usb_dr_mode rcar_gen3_get_dr_mode(struct device_node *np)
629{
630 enum usb_dr_mode candidate = USB_DR_MODE_UNKNOWN;
631 int i;
632
633 /*
634 * If one of device nodes has other dr_mode except UNKNOWN,
635 * this function returns UNKNOWN. To achieve backward compatibility,
636 * this loop starts the index as 0.
637 */
638 for (i = 0; i < NUM_OF_PHYS; i++) {
639 enum usb_dr_mode mode = of_usb_get_dr_mode_by_phy(np, i);
640
641 if (mode != USB_DR_MODE_UNKNOWN) {
642 if (candidate == USB_DR_MODE_UNKNOWN)
643 candidate = mode;
644 else if (candidate != mode)
645 return USB_DR_MODE_UNKNOWN;
646 }
647 }
648
649 return candidate;
650}
651
652static int rcar_gen3_phy_usb2_probe(struct platform_device *pdev)
653{
654 const struct rcar_gen3_phy_drv_data *phy_data;
655 struct device *dev = &pdev->dev;
656 struct rcar_gen3_chan *channel;
657 struct phy_provider *provider;
658 int ret = 0, i;
659
660 if (!dev->of_node) {
661 dev_err(dev, "This driver needs device tree\n");
662 return -EINVAL;
663 }
664
665 channel = devm_kzalloc(dev, sizeof(*channel), GFP_KERNEL);
666 if (!channel)
667 return -ENOMEM;
668
669 channel->base = devm_platform_ioremap_resource(pdev, 0);
670 if (IS_ERR(channel->base))
671 return PTR_ERR(channel->base);
672
673 channel->obint_enable_bits = USB2_OBINT_BITS;
674 /* get irq number here and request_irq for OTG in phy_init */
675 channel->irq = platform_get_irq_optional(pdev, 0);
676 channel->dr_mode = rcar_gen3_get_dr_mode(dev->of_node);
677 if (channel->dr_mode != USB_DR_MODE_UNKNOWN) {
678 int ret;
679
680 channel->is_otg_channel = true;
681 channel->uses_otg_pins = !of_property_read_bool(dev->of_node,
682 "renesas,no-otg-pins");
683 channel->extcon = devm_extcon_dev_allocate(dev,
684 rcar_gen3_phy_cable);
685 if (IS_ERR(channel->extcon))
686 return PTR_ERR(channel->extcon);
687
688 ret = devm_extcon_dev_register(dev, channel->extcon);
689 if (ret < 0) {
690 dev_err(dev, "Failed to register extcon\n");
691 return ret;
692 }
693 }
694
695 /*
696 * devm_phy_create() will call pm_runtime_enable(&phy->dev);
697 * And then, phy-core will manage runtime pm for this device.
698 */
699 pm_runtime_enable(dev);
700
701 phy_data = of_device_get_match_data(dev);
702 if (!phy_data) {
703 ret = -EINVAL;
704 goto error;
705 }
706
707 channel->soc_no_adp_ctrl = phy_data->no_adp_ctrl;
708 if (phy_data->no_adp_ctrl)
709 channel->obint_enable_bits = USB2_OBINT_IDCHG_EN;
710
711 mutex_init(&channel->lock);
712 for (i = 0; i < NUM_OF_PHYS; i++) {
713 channel->rphys[i].phy = devm_phy_create(dev, NULL,
714 phy_data->phy_usb2_ops);
715 if (IS_ERR(channel->rphys[i].phy)) {
716 dev_err(dev, "Failed to create USB2 PHY\n");
717 ret = PTR_ERR(channel->rphys[i].phy);
718 goto error;
719 }
720 channel->rphys[i].ch = channel;
721 channel->rphys[i].int_enable_bits = rcar_gen3_int_enable[i];
722 phy_set_drvdata(channel->rphys[i].phy, &channel->rphys[i]);
723 }
724
725 channel->vbus = devm_regulator_get_optional(dev, "vbus");
726 if (IS_ERR(channel->vbus)) {
727 if (PTR_ERR(channel->vbus) == -EPROBE_DEFER) {
728 ret = PTR_ERR(channel->vbus);
729 goto error;
730 }
731 channel->vbus = NULL;
732 }
733
734 platform_set_drvdata(pdev, channel);
735 channel->dev = dev;
736
737 provider = devm_of_phy_provider_register(dev, rcar_gen3_phy_usb2_xlate);
738 if (IS_ERR(provider)) {
739 dev_err(dev, "Failed to register PHY provider\n");
740 ret = PTR_ERR(provider);
741 goto error;
742 } else if (channel->is_otg_channel) {
743 int ret;
744
745 ret = device_create_file(dev, &dev_attr_role);
746 if (ret < 0)
747 goto error;
748 }
749
750 return 0;
751
752error:
753 pm_runtime_disable(dev);
754
755 return ret;
756}
757
758static int rcar_gen3_phy_usb2_remove(struct platform_device *pdev)
759{
760 struct rcar_gen3_chan *channel = platform_get_drvdata(pdev);
761
762 if (channel->is_otg_channel)
763 device_remove_file(&pdev->dev, &dev_attr_role);
764
765 pm_runtime_disable(&pdev->dev);
766
767 return 0;
768};
769
770static struct platform_driver rcar_gen3_phy_usb2_driver = {
771 .driver = {
772 .name = "phy_rcar_gen3_usb2",
773 .of_match_table = rcar_gen3_phy_usb2_match_table,
774 },
775 .probe = rcar_gen3_phy_usb2_probe,
776 .remove = rcar_gen3_phy_usb2_remove,
777};
778module_platform_driver(rcar_gen3_phy_usb2_driver);
779
780MODULE_LICENSE("GPL v2");
781MODULE_DESCRIPTION("Renesas R-Car Gen3 USB 2.0 PHY");
782MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");