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Linux 4.19.133
[linux/fpc-iii.git] / drivers / usb / renesas_usbhs / common.c
blobb0792585d5bc205d102330ebb32be37f26e1c65d
1 // SPDX-License-Identifier: GPL-1.0+
2 /*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8 #include <linux/err.h>
9 #include <linux/gpio.h>
10 #include <linux/io.h>
11 #include <linux/module.h>
12 #include <linux/of_device.h>
13 #include <linux/of_gpio.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/slab.h>
16 #include <linux/sysfs.h>
17 #include "common.h"
18 #include "rcar2.h"
19 #include "rcar3.h"
20 #include "rza.h"
21
22 /*
23 * image of renesas_usbhs
24 *
25 * ex) gadget case
26
27 * mod.c
28 * mod_gadget.c
29 * mod_host.c pipe.c fifo.c
30 *
31 * +-------+ +-----------+
32 * | pipe0 |------>| fifo pio |
33 * +------------+ +-------+ +-----------+
34 * | mod_gadget |=====> | pipe1 |--+
35 * +------------+ +-------+ | +-----------+
36 * | pipe2 | | +-| fifo dma0 |
37 * +------------+ +-------+ | | +-----------+
38 * | mod_host | | pipe3 |<-|--+
39 * +------------+ +-------+ | +-----------+
40 * | .... | +--->| fifo dma1 |
41 * | .... | +-----------+
42 */
43
44
45 #define USBHSF_RUNTIME_PWCTRL (1 << 0)
46
47 /* status */
48 #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
49 #define usbhsc_flags_set(p, b) ((p)->flags |= (b))
50 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
51 #define usbhsc_flags_has(p, b) ((p)->flags & (b))
52
53 /*
54 * platform call back
55 *
56 * renesas usb support platform callback function.
57 * Below macro call it.
58 * if platform doesn't have callback, it return 0 (no error)
59 */
60 #define usbhs_platform_call(priv, func, args...)\
61 (!(priv) ? -ENODEV : \
62 !((priv)->pfunc.func) ? 0 : \
63 (priv)->pfunc.func(args))
64
65 /*
66 * common functions
67 */
68 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
69 {
70 return ioread16(priv->base + reg);
71 }
72
73 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
74 {
75 iowrite16(data, priv->base + reg);
76 }
77
78 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
79 {
80 u16 val = usbhs_read(priv, reg);
81
82 val &= ~mask;
83 val |= data & mask;
84
85 usbhs_write(priv, reg, val);
86 }
87
88 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
89 {
90 return dev_get_drvdata(&pdev->dev);
91 }
92
93 /*
94 * syscfg functions
95 */
96 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
97 {
98 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
99 }
100
101 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
102 {
103 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
104 u16 val = DCFM | DRPD | HSE | USBE;
105 int has_otg = usbhs_get_dparam(priv, has_otg);
106
107 if (has_otg)
108 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
109
110 /*
111 * if enable
112 *
113 * - select Host mode
114 * - D+ Line/D- Line Pull-down
115 */
116 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
117 }
118
119 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
120 {
121 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
122 u16 val = HSE | USBE;
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
135 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
136 {
137 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
138 }
139
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 */
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 */
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 = usbhs_read(priv, USBVAL);
165 req->wIndex = usbhs_read(priv, USBINDX);
166 req->wLength = usbhs_read(priv, USBLENG);
167 }
168
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, req->wValue);
173 usbhs_write(priv, USBINDX, req->wIndex);
174 usbhs_write(priv, USBLENG, req->wLength);
175
176 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
177 }
178
179 /*
180 * bus/vbus functions
181 */
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
194 void usbhs_bus_send_reset(struct usbhs_priv *priv)
195 {
196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
197 }
198
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
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
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 */
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 */
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 */
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
293 /*
294 * platform default param
295 */
296
297 /* commonly used on old SH-Mobile SoCs */
298 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
299 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
300 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
301 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
302 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
303 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
304 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
305 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
306 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
307 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
308 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
309 };
310
311 /* commonly used on newer SH-Mobile and R-Car SoCs */
312 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
313 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
314 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
315 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
316 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
317 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
318 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
319 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
320 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
321 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
322 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
323 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
324 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
325 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
326 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
327 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
328 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
329 };
330
331 /*
332 * power control
333 */
334 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
335 {
336 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
337 struct device *dev = usbhs_priv_to_dev(priv);
338
339 if (enable) {
340 /* enable PM */
341 pm_runtime_get_sync(dev);
342
343 /* enable platform power */
344 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
345
346 /* USB on */
347 usbhs_sys_clock_ctrl(priv, enable);
348 } else {
349 /* USB off */
350 usbhs_sys_clock_ctrl(priv, enable);
351
352 /* disable platform power */
353 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
354
355 /* disable PM */
356 pm_runtime_put_sync(dev);
357 }
358 }
359
360 /*
361 * hotplug
362 */
363 static void usbhsc_hotplug(struct usbhs_priv *priv)
364 {
365 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
366 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
367 int id;
368 int enable;
369 int cable;
370 int ret;
371
372 /*
373 * get vbus status from platform
374 */
375 enable = usbhs_platform_call(priv, get_vbus, pdev);
376
377 /*
378 * get id from platform
379 */
380 id = usbhs_platform_call(priv, get_id, pdev);
381
382 if (enable && !mod) {
383 if (priv->edev) {
384 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
385 if ((cable > 0 && id != USBHS_HOST) ||
386 (!cable && id != USBHS_GADGET)) {
387 dev_info(&pdev->dev,
388 "USB cable plugged in doesn't match the selected role!\n");
389 return;
390 }
391 }
392
393 ret = usbhs_mod_change(priv, id);
394 if (ret < 0)
395 return;
396
397 dev_dbg(&pdev->dev, "%s enable\n", __func__);
398
399 /* power on */
400 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
401 usbhsc_power_ctrl(priv, enable);
402
403 /* bus init */
404 usbhsc_set_buswait(priv);
405 usbhsc_bus_init(priv);
406
407 /* module start */
408 usbhs_mod_call(priv, start, priv);
409
410 } else if (!enable && mod) {
411 dev_dbg(&pdev->dev, "%s disable\n", __func__);
412
413 /* module stop */
414 usbhs_mod_call(priv, stop, priv);
415
416 /* bus init */
417 usbhsc_bus_init(priv);
418
419 /* power off */
420 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
421 usbhsc_power_ctrl(priv, enable);
422
423 usbhs_mod_change(priv, -1);
424
425 /* reset phy for next connection */
426 usbhs_platform_call(priv, phy_reset, pdev);
427 }
428 }
429
430 /*
431 * notify hotplug
432 */
433 static void usbhsc_notify_hotplug(struct work_struct *work)
434 {
435 struct usbhs_priv *priv = container_of(work,
436 struct usbhs_priv,
437 notify_hotplug_work.work);
438 usbhsc_hotplug(priv);
439 }
440
441 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
442 {
443 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
444 int delay = usbhs_get_dparam(priv, detection_delay);
445
446 /*
447 * This functions will be called in interrupt.
448 * To make sure safety context,
449 * use workqueue for usbhs_notify_hotplug
450 */
451 schedule_delayed_work(&priv->notify_hotplug_work,
452 msecs_to_jiffies(delay));
453 return 0;
454 }
455
456 /*
457 * platform functions
458 */
459 static const struct of_device_id usbhs_of_match[] = {
460 {
461 .compatible = "renesas,usbhs-r8a774c0",
462 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL,
463 },
464 {
465 .compatible = "renesas,usbhs-r8a7790",
466 .data = (void *)USBHS_TYPE_RCAR_GEN2,
467 },
468 {
469 .compatible = "renesas,usbhs-r8a7791",
470 .data = (void *)USBHS_TYPE_RCAR_GEN2,
471 },
472 {
473 .compatible = "renesas,usbhs-r8a7794",
474 .data = (void *)USBHS_TYPE_RCAR_GEN2,
475 },
476 {
477 .compatible = "renesas,usbhs-r8a7795",
478 .data = (void *)USBHS_TYPE_RCAR_GEN3,
479 },
480 {
481 .compatible = "renesas,usbhs-r8a7796",
482 .data = (void *)USBHS_TYPE_RCAR_GEN3,
483 },
484 {
485 .compatible = "renesas,usbhs-r8a77995",
486 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL,
487 },
488 {
489 .compatible = "renesas,rcar-gen2-usbhs",
490 .data = (void *)USBHS_TYPE_RCAR_GEN2,
491 },
492 {
493 .compatible = "renesas,rcar-gen3-usbhs",
494 .data = (void *)USBHS_TYPE_RCAR_GEN3,
495 },
496 {
497 .compatible = "renesas,rza1-usbhs",
498 .data = (void *)USBHS_TYPE_RZA1,
499 },
500 { },
501 };
502 MODULE_DEVICE_TABLE(of, usbhs_of_match);
503
504 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
505 {
506 struct renesas_usbhs_platform_info *info;
507 struct renesas_usbhs_driver_param *dparam;
508 u32 tmp;
509 int gpio;
510
511 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
512 if (!info)
513 return NULL;
514
515 dparam = &info->driver_param;
516 dparam->type = (uintptr_t)of_device_get_match_data(dev);
517 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
518 dparam->buswait_bwait = tmp;
519 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
520 NULL);
521 if (gpio > 0)
522 dparam->enable_gpio = gpio;
523
524 if (dparam->type == USBHS_TYPE_RCAR_GEN2 ||
525 dparam->type == USBHS_TYPE_RCAR_GEN3 ||
526 dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) {
527 dparam->has_usb_dmac = 1;
528 dparam->pipe_configs = usbhsc_new_pipe;
529 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
530 }
531
532 if (dparam->type == USBHS_TYPE_RZA1) {
533 dparam->pipe_configs = usbhsc_new_pipe;
534 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
535 }
536
537 return info;
538 }
539
540 static int usbhs_probe(struct platform_device *pdev)
541 {
542 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev);
543 struct renesas_usbhs_driver_callback *dfunc;
544 struct usbhs_priv *priv;
545 struct resource *res, *irq_res;
546 int ret;
547
548 /* check device node */
549 if (pdev->dev.of_node)
550 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
551
552 /* check platform information */
553 if (!info) {
554 dev_err(&pdev->dev, "no platform information\n");
555 return -EINVAL;
556 }
557
558 /* platform data */
559 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
560 if (!irq_res) {
561 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
562 return -ENODEV;
563 }
564
565 /* usb private data */
566 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
567 if (!priv)
568 return -ENOMEM;
569
570 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
571 priv->base = devm_ioremap_resource(&pdev->dev, res);
572 if (IS_ERR(priv->base))
573 return PTR_ERR(priv->base);
574
575 if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
576 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
577 if (IS_ERR(priv->edev))
578 return PTR_ERR(priv->edev);
579 }
580
581 /*
582 * care platform info
583 */
584
585 memcpy(&priv->dparam,
586 &info->driver_param,
587 sizeof(struct renesas_usbhs_driver_param));
588
589 switch (priv->dparam.type) {
590 case USBHS_TYPE_RCAR_GEN2:
591 priv->pfunc = usbhs_rcar2_ops;
592 break;
593 case USBHS_TYPE_RCAR_GEN3:
594 priv->pfunc = usbhs_rcar3_ops;
595 break;
596 case USBHS_TYPE_RCAR_GEN3_WITH_PLL:
597 priv->pfunc = usbhs_rcar3_with_pll_ops;
598 if (!IS_ERR_OR_NULL(priv->edev)) {
599 priv->nb.notifier_call = priv->pfunc.notifier;
600 ret = devm_extcon_register_notifier(&pdev->dev,
601 priv->edev,
602 EXTCON_USB_HOST,
603 &priv->nb);
604 if (ret < 0)
605 dev_err(&pdev->dev, "no notifier registered\n");
606 }
607 break;
608 case USBHS_TYPE_RZA1:
609 priv->pfunc = usbhs_rza1_ops;
610 break;
611 default:
612 if (!info->platform_callback.get_id) {
613 dev_err(&pdev->dev, "no platform callbacks");
614 return -EINVAL;
615 }
616 memcpy(&priv->pfunc,
617 &info->platform_callback,
618 sizeof(struct renesas_usbhs_platform_callback));
619 break;
620 }
621
622 /* set driver callback functions for platform */
623 dfunc = &info->driver_callback;
624 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
625
626 /* set default param if platform doesn't have */
627 if (!priv->dparam.pipe_configs) {
628 priv->dparam.pipe_configs = usbhsc_default_pipe;
629 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
630 }
631 if (!priv->dparam.pio_dma_border)
632 priv->dparam.pio_dma_border = 64; /* 64byte */
633
634 /* FIXME */
635 /* runtime power control ? */
636 if (priv->pfunc.get_vbus)
637 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
638
639 /*
640 * priv settings
641 */
642 priv->irq = irq_res->start;
643 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
644 priv->irqflags = IRQF_SHARED;
645 priv->pdev = pdev;
646 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
647 spin_lock_init(usbhs_priv_to_lock(priv));
648
649 /* call pipe and module init */
650 ret = usbhs_pipe_probe(priv);
651 if (ret < 0)
652 return ret;
653
654 ret = usbhs_fifo_probe(priv);
655 if (ret < 0)
656 goto probe_end_pipe_exit;
657
658 ret = usbhs_mod_probe(priv);
659 if (ret < 0)
660 goto probe_end_fifo_exit;
661
662 /* dev_set_drvdata should be called after usbhs_mod_init */
663 platform_set_drvdata(pdev, priv);
664
665 /*
666 * deviece reset here because
667 * USB device might be used in boot loader.
668 */
669 usbhs_sys_clock_ctrl(priv, 0);
670
671 /* check GPIO determining if USB function should be enabled */
672 if (priv->dparam.enable_gpio) {
673 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
674 ret = !gpio_get_value(priv->dparam.enable_gpio);
675 gpio_free(priv->dparam.enable_gpio);
676 if (ret) {
677 dev_warn(&pdev->dev,
678 "USB function not selected (GPIO %d)\n",
679 priv->dparam.enable_gpio);
680 ret = -ENOTSUPP;
681 goto probe_end_mod_exit;
682 }
683 }
684
685 /*
686 * platform call
687 *
688 * USB phy setup might depend on CPU/Board.
689 * If platform has its callback functions,
690 * call it here.
691 */
692 ret = usbhs_platform_call(priv, hardware_init, pdev);
693 if (ret < 0) {
694 dev_err(&pdev->dev, "platform init failed.\n");
695 goto probe_end_mod_exit;
696 }
697
698 /* reset phy for connection */
699 usbhs_platform_call(priv, phy_reset, pdev);
700
701 /* power control */
702 pm_runtime_enable(&pdev->dev);
703 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
704 usbhsc_power_ctrl(priv, 1);
705 usbhs_mod_autonomy_mode(priv);
706 }
707
708 /*
709 * manual call notify_hotplug for cold plug
710 */
711 usbhsc_drvcllbck_notify_hotplug(pdev);
712
713 dev_info(&pdev->dev, "probed\n");
714
715 return ret;
716
717 probe_end_mod_exit:
718 usbhs_mod_remove(priv);
719 probe_end_fifo_exit:
720 usbhs_fifo_remove(priv);
721 probe_end_pipe_exit:
722 usbhs_pipe_remove(priv);
723
724 dev_info(&pdev->dev, "probe failed (%d)\n", ret);
725
726 return ret;
727 }
728
729 static int usbhs_remove(struct platform_device *pdev)
730 {
731 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
732 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev);
733 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
734
735 dev_dbg(&pdev->dev, "usb remove\n");
736
737 dfunc->notify_hotplug = NULL;
738
739 /* power off */
740 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
741 usbhsc_power_ctrl(priv, 0);
742
743 pm_runtime_disable(&pdev->dev);
744
745 usbhs_platform_call(priv, hardware_exit, pdev);
746 usbhs_mod_remove(priv);
747 usbhs_fifo_remove(priv);
748 usbhs_pipe_remove(priv);
749
750 return 0;
751 }
752
753 static int usbhsc_suspend(struct device *dev)
754 {
755 struct usbhs_priv *priv = dev_get_drvdata(dev);
756 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
757
758 if (mod) {
759 usbhs_mod_call(priv, stop, priv);
760 usbhs_mod_change(priv, -1);
761 }
762
763 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
764 usbhsc_power_ctrl(priv, 0);
765
766 return 0;
767 }
768
769 static int usbhsc_resume(struct device *dev)
770 {
771 struct usbhs_priv *priv = dev_get_drvdata(dev);
772 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
773
774 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
775 usbhsc_power_ctrl(priv, 1);
776 usbhs_mod_autonomy_mode(priv);
777 }
778
779 usbhs_platform_call(priv, phy_reset, pdev);
780
781 usbhsc_drvcllbck_notify_hotplug(pdev);
782
783 return 0;
784 }
785
786 static int usbhsc_runtime_nop(struct device *dev)
787 {
788 /* Runtime PM callback shared between ->runtime_suspend()
789 * and ->runtime_resume(). Simply returns success.
790 *
791 * This driver re-initializes all registers after
792 * pm_runtime_get_sync() anyway so there is no need
793 * to save and restore registers here.
794 */
795 return 0;
796 }
797
798 static const struct dev_pm_ops usbhsc_pm_ops = {
799 .suspend = usbhsc_suspend,
800 .resume = usbhsc_resume,
801 .runtime_suspend = usbhsc_runtime_nop,
802 .runtime_resume = usbhsc_runtime_nop,
803 };
804
805 static struct platform_driver renesas_usbhs_driver = {
806 .driver = {
807 .name = "renesas_usbhs",
808 .pm = &usbhsc_pm_ops,
809 .of_match_table = of_match_ptr(usbhs_of_match),
810 },
811 .probe = usbhs_probe,
812 .remove = usbhs_remove,
813 };
814
815 module_platform_driver(renesas_usbhs_driver);
816
817 MODULE_LICENSE("GPL");
818 MODULE_DESCRIPTION("Renesas USB driver");
819 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Linux with added FPC-III support