1 // SPDX-License-Identifier: GPL-1.0+
2 /*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Copyright (C) 2019 Renesas Electronics Corporation
7 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
8 */
9 #include <linux/clk.h>
10 #include <linux/err.h>
11 #include <linux/gpio/consumer.h>
12 #include <linux/io.h>
13 #include <linux/module.h>
14 #include <linux/of.h>
15 #include <linux/pm_runtime.h>
16 #include <linux/reset.h>
17 #include <linux/slab.h>
18 #include <linux/sysfs.h>
19 #include "common.h"
20 #include "rcar2.h"
21 #include "rcar3.h"
22 #include "rza.h"
23
24 /*
25 * image of renesas_usbhs
26 *
27 * ex) gadget case
28
29 * mod.c
30 * mod_gadget.c
31 * mod_host.c pipe.c fifo.c
32 *
33 * +-------+ +-----------+
34 * | pipe0 |------>| fifo pio |
35 * +------------+ +-------+ +-----------+
36 * | mod_gadget |=====> | pipe1 |--+
37 * +------------+ +-------+ | +-----------+
38 * | pipe2 | | +-| fifo dma0 |
39 * +------------+ +-------+ | | +-----------+
40 * | mod_host | | pipe3 |<-|--+
41 * +------------+ +-------+ | +-----------+
42 * | .... | +--->| fifo dma1 |
43 * | .... | +-----------+
44 */
45
46 /*
47 * platform call back
48 *
49 * renesas usb support platform callback function.
50 * Below macro call it.
51 * if platform doesn't have callback, it return 0 (no error)
52 */
53 #define usbhs_platform_call(priv, func, args...)\
54 (!(priv) ? -ENODEV : \
55 !((priv)->pfunc->func) ? 0 : \
56 (priv)->pfunc->func(args))
57
58 /*
59 * common functions
60 */
usbhs_read(struct usbhs_priv * priv,u32 reg)61 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
62 {
63 return ioread16(priv->base + reg);
64 }
65
usbhs_write(struct usbhs_priv * priv,u32 reg,u16 data)66 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
67 {
68 iowrite16(data, priv->base + reg);
69 }
70
usbhs_bset(struct usbhs_priv * priv,u32 reg,u16 mask,u16 data)71 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
72 {
73 u16 val = usbhs_read(priv, reg);
74
75 val &= ~mask;
76 val |= data & mask;
77
78 usbhs_write(priv, reg, val);
79 }
80
usbhs_pdev_to_priv(struct platform_device * pdev)81 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
82 {
83 return dev_get_drvdata(&pdev->dev);
84 }
85
usbhs_get_id_as_gadget(struct platform_device * pdev)86 int usbhs_get_id_as_gadget(struct platform_device *pdev)
87 {
88 return USBHS_GADGET;
89 }
90
91 /*
92 * syscfg functions
93 */
usbhs_sys_clock_ctrl(struct usbhs_priv * priv,int enable)94 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
95 {
96 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
97 }
98
usbhs_sys_host_ctrl(struct usbhs_priv * priv,int enable)99 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
100 {
101 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
102 u16 val = DCFM | DRPD | HSE | USBE;
103
104 /*
105 * if enable
106 *
107 * - select Host mode
108 * - D+ Line/D- Line Pull-down
109 */
110 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
111 }
112
usbhs_sys_function_ctrl(struct usbhs_priv * priv,int enable)113 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
114 {
115 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
116 u16 val = HSE | USBE;
117
118 /* CNEN bit is required for function operation */
119 if (usbhs_get_dparam(priv, has_cnen)) {
120 mask |= CNEN;
121 val |= CNEN;
122 }
123
124 /*
125 * if enable
126 *
127 * - select Function mode
128 * - D+ Line Pull-up is disabled
129 * When D+ Line Pull-up is enabled,
130 * calling usbhs_sys_function_pullup(,1)
131 */
132 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
133 }
134
usbhs_sys_function_pullup(struct usbhs_priv * priv,int enable)135 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
136 {
137 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
138 }
139
usbhs_sys_set_test_mode(struct usbhs_priv * priv,u16 mode)140 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
141 {
142 usbhs_write(priv, TESTMODE, mode);
143 }
144
145 /*
146 * frame functions
147 */
usbhs_frame_get_num(struct usbhs_priv * priv)148 int usbhs_frame_get_num(struct usbhs_priv *priv)
149 {
150 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
151 }
152
153 /*
154 * usb request functions
155 */
usbhs_usbreq_get_val(struct usbhs_priv * priv,struct usb_ctrlrequest * req)156 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
157 {
158 u16 val;
159
160 val = usbhs_read(priv, USBREQ);
161 req->bRequest = (val >> 8) & 0xFF;
162 req->bRequestType = (val >> 0) & 0xFF;
163
164 req->wValue = cpu_to_le16(usbhs_read(priv, USBVAL));
165 req->wIndex = cpu_to_le16(usbhs_read(priv, USBINDX));
166 req->wLength = cpu_to_le16(usbhs_read(priv, USBLENG));
167 }
168
usbhs_usbreq_set_val(struct usbhs_priv * priv,struct usb_ctrlrequest * req)169 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
170 {
171 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
172 usbhs_write(priv, USBVAL, le16_to_cpu(req->wValue));
173 usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex));
174 usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength));
175
176 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
177 }
178
179 /*
180 * bus/vbus functions
181 */
usbhs_bus_send_sof_enable(struct usbhs_priv * priv)182 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
183 {
184 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
185
186 if (status != USBRST) {
187 struct device *dev = usbhs_priv_to_dev(priv);
188 dev_err(dev, "usbhs should be reset\n");
189 }
190
191 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
192 }
193
usbhs_bus_send_reset(struct usbhs_priv * priv)194 void usbhs_bus_send_reset(struct usbhs_priv *priv)
195 {
196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
197 }
198
usbhs_bus_get_speed(struct usbhs_priv * priv)199 int usbhs_bus_get_speed(struct usbhs_priv *priv)
200 {
201 u16 dvstctr = usbhs_read(priv, DVSTCTR);
202
203 switch (RHST & dvstctr) {
204 case RHST_LOW_SPEED:
205 return USB_SPEED_LOW;
206 case RHST_FULL_SPEED:
207 return USB_SPEED_FULL;
208 case RHST_HIGH_SPEED:
209 return USB_SPEED_HIGH;
210 }
211
212 return USB_SPEED_UNKNOWN;
213 }
214
usbhs_vbus_ctrl(struct usbhs_priv * priv,int enable)215 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
216 {
217 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
218
219 return usbhs_platform_call(priv, set_vbus, pdev, enable);
220 }
221
usbhsc_bus_init(struct usbhs_priv * priv)222 static void usbhsc_bus_init(struct usbhs_priv *priv)
223 {
224 usbhs_write(priv, DVSTCTR, 0);
225
226 usbhs_vbus_ctrl(priv, 0);
227 }
228
229 /*
230 * device configuration
231 */
usbhs_set_device_config(struct usbhs_priv * priv,int devnum,u16 upphub,u16 hubport,u16 speed)232 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
233 u16 upphub, u16 hubport, u16 speed)
234 {
235 struct device *dev = usbhs_priv_to_dev(priv);
236 u16 usbspd = 0;
237 u32 reg = DEVADD0 + (2 * devnum);
238
239 if (devnum > 10) {
240 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
241 return -EIO;
242 }
243
244 if (upphub > 0xA) {
245 dev_err(dev, "unsupported hub number %d\n", upphub);
246 return -EIO;
247 }
248
249 switch (speed) {
250 case USB_SPEED_LOW:
251 usbspd = USBSPD_SPEED_LOW;
252 break;
253 case USB_SPEED_FULL:
254 usbspd = USBSPD_SPEED_FULL;
255 break;
256 case USB_SPEED_HIGH:
257 usbspd = USBSPD_SPEED_HIGH;
258 break;
259 default:
260 dev_err(dev, "unsupported speed %d\n", speed);
261 return -EIO;
262 }
263
264 usbhs_write(priv, reg, UPPHUB(upphub) |
265 HUBPORT(hubport)|
266 USBSPD(usbspd));
267
268 return 0;
269 }
270
271 /*
272 * interrupt functions
273 */
usbhs_xxxsts_clear(struct usbhs_priv * priv,u16 sts_reg,u16 bit)274 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
275 {
276 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
277
278 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
279 }
280
281 /*
282 * local functions
283 */
usbhsc_set_buswait(struct usbhs_priv * priv)284 static void usbhsc_set_buswait(struct usbhs_priv *priv)
285 {
286 int wait = usbhs_get_dparam(priv, buswait_bwait);
287
288 /* set bus wait if platform have */
289 if (wait)
290 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
291 }
292
usbhsc_is_multi_clks(struct usbhs_priv * priv)293 static bool usbhsc_is_multi_clks(struct usbhs_priv *priv)
294 {
295 return priv->dparam.multi_clks;
296 }
297
usbhsc_clk_get(struct device * dev,struct usbhs_priv * priv)298 static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv)
299 {
300 if (!usbhsc_is_multi_clks(priv))
301 return 0;
302
303 /* The first clock should exist */
304 priv->clks[0] = of_clk_get(dev_of_node(dev), 0);
305 if (IS_ERR(priv->clks[0]))
306 return PTR_ERR(priv->clks[0]);
307
308 /*
309 * To backward compatibility with old DT, this driver checks the return
310 * value if it's -ENOENT or not.
311 */
312 priv->clks[1] = of_clk_get(dev_of_node(dev), 1);
313 if (PTR_ERR(priv->clks[1]) == -ENOENT)
314 priv->clks[1] = NULL;
315 else if (IS_ERR(priv->clks[1]))
316 return PTR_ERR(priv->clks[1]);
317
318 return 0;
319 }
320
usbhsc_clk_put(struct usbhs_priv * priv)321 static void usbhsc_clk_put(struct usbhs_priv *priv)
322 {
323 int i;
324
325 if (!usbhsc_is_multi_clks(priv))
326 return;
327
328 for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
329 clk_put(priv->clks[i]);
330 }
331
usbhsc_clk_prepare_enable(struct usbhs_priv * priv)332 static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv)
333 {
334 int i, ret;
335
336 if (!usbhsc_is_multi_clks(priv))
337 return 0;
338
339 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) {
340 ret = clk_prepare_enable(priv->clks[i]);
341 if (ret) {
342 while (--i >= 0)
343 clk_disable_unprepare(priv->clks[i]);
344 return ret;
345 }
346 }
347
348 return ret;
349 }
350
usbhsc_clk_disable_unprepare(struct usbhs_priv * priv)351 static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv)
352 {
353 int i;
354
355 if (!usbhsc_is_multi_clks(priv))
356 return;
357
358 for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
359 clk_disable_unprepare(priv->clks[i]);
360 }
361
362 /*
363 * platform default param
364 */
365
366 /* commonly used on old SH-Mobile SoCs */
367 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
368 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
369 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
370 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
371 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
372 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
373 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
374 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
375 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
376 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
377 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
378 };
379
380 /* commonly used on newer SH-Mobile and R-Car SoCs */
381 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
382 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
383 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
384 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
385 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
386 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
387 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
388 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
389 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
390 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
391 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
392 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
393 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
394 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
395 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
396 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
397 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
398 };
399
400 /*
401 * power control
402 */
usbhsc_power_ctrl(struct usbhs_priv * priv,int enable)403 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
404 {
405 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
406 struct device *dev = usbhs_priv_to_dev(priv);
407
408 if (enable) {
409 /* enable PM */
410 pm_runtime_get_sync(dev);
411
412 /* enable clks */
413 if (usbhsc_clk_prepare_enable(priv))
414 return;
415
416 /* enable platform power */
417 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
418
419 /* USB on */
420 usbhs_sys_clock_ctrl(priv, enable);
421 } else {
422 /* USB off */
423 usbhs_sys_clock_ctrl(priv, enable);
424
425 /* disable platform power */
426 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
427
428 /* disable clks */
429 usbhsc_clk_disable_unprepare(priv);
430
431 /* disable PM */
432 pm_runtime_put_sync(dev);
433 }
434 }
435
436 /*
437 * hotplug
438 */
usbhsc_hotplug(struct usbhs_priv * priv)439 static void usbhsc_hotplug(struct usbhs_priv *priv)
440 {
441 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
442 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
443 int id;
444 int enable;
445 int cable;
446 int ret;
447
448 /*
449 * get vbus status from platform
450 */
451 enable = usbhs_mod_info_call(priv, get_vbus, pdev);
452
453 /*
454 * get id from platform
455 */
456 id = usbhs_platform_call(priv, get_id, pdev);
457
458 if (enable && !mod) {
459 if (priv->edev) {
460 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
461 if ((cable > 0 && id != USBHS_HOST) ||
462 (!cable && id != USBHS_GADGET)) {
463 dev_info(&pdev->dev,
464 "USB cable plugged in doesn't match the selected role!\n");
465 return;
466 }
467 }
468
469 ret = usbhs_mod_change(priv, id);
470 if (ret < 0)
471 return;
472
473 dev_dbg(&pdev->dev, "%s enable\n", __func__);
474
475 /* power on */
476 if (usbhs_get_dparam(priv, runtime_pwctrl))
477 usbhsc_power_ctrl(priv, enable);
478
479 /* bus init */
480 usbhsc_set_buswait(priv);
481 usbhsc_bus_init(priv);
482
483 /* module start */
484 usbhs_mod_call(priv, start, priv);
485
486 } else if (!enable && mod) {
487 dev_dbg(&pdev->dev, "%s disable\n", __func__);
488
489 /* module stop */
490 usbhs_mod_call(priv, stop, priv);
491
492 /* bus init */
493 usbhsc_bus_init(priv);
494
495 /* power off */
496 if (usbhs_get_dparam(priv, runtime_pwctrl))
497 usbhsc_power_ctrl(priv, enable);
498
499 usbhs_mod_change(priv, -1);
500
501 /* reset phy for next connection */
502 usbhs_platform_call(priv, phy_reset, pdev);
503 }
504 }
505
506 /*
507 * notify hotplug
508 */
usbhsc_notify_hotplug(struct work_struct * work)509 static void usbhsc_notify_hotplug(struct work_struct *work)
510 {
511 struct usbhs_priv *priv = container_of(work,
512 struct usbhs_priv,
513 notify_hotplug_work.work);
514 usbhsc_hotplug(priv);
515 }
516
usbhsc_schedule_notify_hotplug(struct platform_device * pdev)517 int usbhsc_schedule_notify_hotplug(struct platform_device *pdev)
518 {
519 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
520 int delay = usbhs_get_dparam(priv, detection_delay);
521
522 /*
523 * This functions will be called in interrupt.
524 * To make sure safety context,
525 * use workqueue for usbhs_notify_hotplug
526 */
527 schedule_delayed_work(&priv->notify_hotplug_work,
528 msecs_to_jiffies(delay));
529 return 0;
530 }
531
532 /*
533 * platform functions
534 */
535 static const struct of_device_id usbhs_of_match[] = {
536 {
537 .compatible = "renesas,usbhs-r8a774c0",
538 .data = &usbhs_rcar_gen3_with_pll_plat_info,
539 },
540 {
541 .compatible = "renesas,usbhs-r8a7790",
542 .data = &usbhs_rcar_gen2_plat_info,
543 },
544 {
545 .compatible = "renesas,usbhs-r8a7791",
546 .data = &usbhs_rcar_gen2_plat_info,
547 },
548 {
549 .compatible = "renesas,usbhs-r8a7794",
550 .data = &usbhs_rcar_gen2_plat_info,
551 },
552 {
553 .compatible = "renesas,usbhs-r8a7795",
554 .data = &usbhs_rcar_gen3_plat_info,
555 },
556 {
557 .compatible = "renesas,usbhs-r8a7796",
558 .data = &usbhs_rcar_gen3_plat_info,
559 },
560 {
561 .compatible = "renesas,usbhs-r8a77990",
562 .data = &usbhs_rcar_gen3_with_pll_plat_info,
563 },
564 {
565 .compatible = "renesas,usbhs-r8a77995",
566 .data = &usbhs_rcar_gen3_with_pll_plat_info,
567 },
568 {
569 .compatible = "renesas,rcar-gen2-usbhs",
570 .data = &usbhs_rcar_gen2_plat_info,
571 },
572 {
573 .compatible = "renesas,rcar-gen3-usbhs",
574 .data = &usbhs_rcar_gen3_plat_info,
575 },
576 {
577 .compatible = "renesas,rza1-usbhs",
578 .data = &usbhs_rza1_plat_info,
579 },
580 {
581 .compatible = "renesas,rza2-usbhs",
582 .data = &usbhs_rza2_plat_info,
583 },
584 { },
585 };
586 MODULE_DEVICE_TABLE(of, usbhs_of_match);
587
usbhs_probe(struct platform_device * pdev)588 static int usbhs_probe(struct platform_device *pdev)
589 {
590 const struct renesas_usbhs_platform_info *info;
591 struct usbhs_priv *priv;
592 struct device *dev = &pdev->dev;
593 struct gpio_desc *gpiod;
594 int ret;
595 u32 tmp;
596 int irq;
597
598 /* check device node */
599 if (dev_of_node(dev))
600 info = of_device_get_match_data(dev);
601 else
602 info = renesas_usbhs_get_info(pdev);
603
604 /* check platform information */
605 if (!info) {
606 dev_err(dev, "no platform information\n");
607 return -EINVAL;
608 }
609
610 /* platform data */
611 irq = platform_get_irq(pdev, 0);
612 if (irq < 0)
613 return irq;
614
615 /* usb private data */
616 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
617 if (!priv)
618 return -ENOMEM;
619
620 priv->base = devm_platform_ioremap_resource(pdev, 0);
621 if (IS_ERR(priv->base))
622 return PTR_ERR(priv->base);
623
624 if (of_property_read_bool(dev_of_node(dev), "extcon")) {
625 priv->edev = extcon_get_edev_by_phandle(dev, 0);
626 if (IS_ERR(priv->edev))
627 return PTR_ERR(priv->edev);
628 }
629
630 priv->rsts = devm_reset_control_array_get_optional_shared(dev);
631 if (IS_ERR(priv->rsts))
632 return PTR_ERR(priv->rsts);
633
634 /*
635 * care platform info
636 */
637
638 priv->dparam = info->driver_param;
639
640 if (!info->platform_callback.get_id) {
641 dev_err(dev, "no platform callbacks\n");
642 return -EINVAL;
643 }
644 priv->pfunc = &info->platform_callback;
645
646 /* set default param if platform doesn't have */
647 if (usbhs_get_dparam(priv, has_new_pipe_configs)) {
648 priv->dparam.pipe_configs = usbhsc_new_pipe;
649 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
650 } else if (!priv->dparam.pipe_configs) {
651 priv->dparam.pipe_configs = usbhsc_default_pipe;
652 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
653 }
654 if (!priv->dparam.pio_dma_border)
655 priv->dparam.pio_dma_border = 64; /* 64byte */
656 if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp))
657 priv->dparam.buswait_bwait = tmp;
658 gpiod = devm_gpiod_get_optional(dev, "renesas,enable", GPIOD_IN);
659 if (IS_ERR(gpiod))
660 return PTR_ERR(gpiod);
661
662 /* FIXME */
663 /* runtime power control ? */
664 if (priv->pfunc->get_vbus)
665 usbhs_get_dparam(priv, runtime_pwctrl) = 1;
666
667 /*
668 * priv settings
669 */
670 priv->irq = irq;
671 priv->pdev = pdev;
672 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
673 spin_lock_init(usbhs_priv_to_lock(priv));
674
675 /* call pipe and module init */
676 ret = usbhs_pipe_probe(priv);
677 if (ret < 0)
678 return ret;
679
680 ret = usbhs_fifo_probe(priv);
681 if (ret < 0)
682 goto probe_end_pipe_exit;
683
684 ret = usbhs_mod_probe(priv);
685 if (ret < 0)
686 goto probe_end_fifo_exit;
687
688 /* dev_set_drvdata should be called after usbhs_mod_init */
689 platform_set_drvdata(pdev, priv);
690
691 ret = reset_control_deassert(priv->rsts);
692 if (ret)
693 goto probe_fail_rst;
694
695 ret = usbhsc_clk_get(dev, priv);
696 if (ret)
697 goto probe_fail_clks;
698
699 /*
700 * deviece reset here because
701 * USB device might be used in boot loader.
702 */
703 usbhs_sys_clock_ctrl(priv, 0);
704
705 /* check GPIO determining if USB function should be enabled */
706 if (gpiod) {
707 ret = !gpiod_get_value(gpiod);
708 if (ret) {
709 dev_warn(dev, "USB function not selected (GPIO)\n");
710 ret = -ENOTSUPP;
711 goto probe_end_mod_exit;
712 }
713 }
714
715 /*
716 * platform call
717 *
718 * USB phy setup might depend on CPU/Board.
719 * If platform has its callback functions,
720 * call it here.
721 */
722 ret = usbhs_platform_call(priv, hardware_init, pdev);
723 if (ret < 0) {
724 dev_err(dev, "platform init failed.\n");
725 goto probe_end_mod_exit;
726 }
727
728 /* reset phy for connection */
729 usbhs_platform_call(priv, phy_reset, pdev);
730
731 /* power control */
732 pm_runtime_enable(dev);
733 if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
734 usbhsc_power_ctrl(priv, 1);
735 usbhs_mod_autonomy_mode(priv);
736 } else {
737 usbhs_mod_non_autonomy_mode(priv);
738 }
739
740 /*
741 * manual call notify_hotplug for cold plug
742 */
743 usbhsc_schedule_notify_hotplug(pdev);
744
745 dev_info(dev, "probed\n");
746
747 return ret;
748
749 probe_end_mod_exit:
750 usbhsc_clk_put(priv);
751 probe_fail_clks:
752 reset_control_assert(priv->rsts);
753 probe_fail_rst:
754 usbhs_mod_remove(priv);
755 probe_end_fifo_exit:
756 usbhs_fifo_remove(priv);
757 probe_end_pipe_exit:
758 usbhs_pipe_remove(priv);
759
760 dev_info(dev, "probe failed (%d)\n", ret);
761
762 return ret;
763 }
764
usbhs_remove(struct platform_device * pdev)765 static void usbhs_remove(struct platform_device *pdev)
766 {
767 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
768
769 dev_dbg(&pdev->dev, "usb remove\n");
770
771 /* power off */
772 if (!usbhs_get_dparam(priv, runtime_pwctrl))
773 usbhsc_power_ctrl(priv, 0);
774
775 pm_runtime_disable(&pdev->dev);
776
777 usbhs_platform_call(priv, hardware_exit, pdev);
778 usbhsc_clk_put(priv);
779 reset_control_assert(priv->rsts);
780 usbhs_mod_remove(priv);
781 usbhs_fifo_remove(priv);
782 usbhs_pipe_remove(priv);
783 }
784
usbhsc_suspend(struct device * dev)785 static __maybe_unused int usbhsc_suspend(struct device *dev)
786 {
787 struct usbhs_priv *priv = dev_get_drvdata(dev);
788 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
789
790 if (mod) {
791 usbhs_mod_call(priv, stop, priv);
792 usbhs_mod_change(priv, -1);
793 }
794
795 if (mod || !usbhs_get_dparam(priv, runtime_pwctrl))
796 usbhsc_power_ctrl(priv, 0);
797
798 return 0;
799 }
800
usbhsc_resume(struct device * dev)801 static __maybe_unused int usbhsc_resume(struct device *dev)
802 {
803 struct usbhs_priv *priv = dev_get_drvdata(dev);
804 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
805
806 if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
807 usbhsc_power_ctrl(priv, 1);
808 usbhs_mod_autonomy_mode(priv);
809 }
810
811 usbhs_platform_call(priv, phy_reset, pdev);
812
813 usbhsc_schedule_notify_hotplug(pdev);
814
815 return 0;
816 }
817
818 static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume);
819
820 static struct platform_driver renesas_usbhs_driver = {
821 .driver = {
822 .name = "renesas_usbhs",
823 .pm = &usbhsc_pm_ops,
824 .of_match_table = usbhs_of_match,
825 },
826 .probe = usbhs_probe,
827 .remove_new = usbhs_remove,
828 };
829
830 module_platform_driver(renesas_usbhs_driver);
831
832 MODULE_LICENSE("GPL");
833 MODULE_DESCRIPTION("Renesas USB driver");
834 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
835