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drbd: switch to using blk_queue_write_cache()
[deliverable/linux.git] / drivers / usb / renesas_usbhs / common.c
1 /*
2 * Renesas USB driver
3 *
4 * Copyright (C) 2011 Renesas Solutions Corp.
5 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
15 *
16 */
17 #include <linux/err.h>
18 #include <linux/gpio.h>
19 #include <linux/io.h>
20 #include <linux/module.h>
21 #include <linux/of_device.h>
22 #include <linux/of_gpio.h>
23 #include <linux/pm_runtime.h>
24 #include <linux/slab.h>
25 #include <linux/sysfs.h>
26 #include "common.h"
27 #include "rcar2.h"
28 #include "rcar3.h"
29
30 /*
31 * image of renesas_usbhs
32 *
33 * ex) gadget case
34
35 * mod.c
36 * mod_gadget.c
37 * mod_host.c pipe.c fifo.c
38 *
39 * +-------+ +-----------+
40 * | pipe0 |------>| fifo pio |
41 * +------------+ +-------+ +-----------+
42 * | mod_gadget |=====> | pipe1 |--+
43 * +------------+ +-------+ | +-----------+
44 * | pipe2 | | +-| fifo dma0 |
45 * +------------+ +-------+ | | +-----------+
46 * | mod_host | | pipe3 |<-|--+
47 * +------------+ +-------+ | +-----------+
48 * | .... | +--->| fifo dma1 |
49 * | .... | +-----------+
50 */
51
52
53 #define USBHSF_RUNTIME_PWCTRL (1 << 0)
54
55 /* status */
56 #define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
57 #define usbhsc_flags_set(p, b) ((p)->flags |= (b))
58 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
59 #define usbhsc_flags_has(p, b) ((p)->flags & (b))
60
61 /*
62 * platform call back
63 *
64 * renesas usb support platform callback function.
65 * Below macro call it.
66 * if platform doesn't have callback, it return 0 (no error)
67 */
68 #define usbhs_platform_call(priv, func, args...)\
69 (!(priv) ? -ENODEV : \
70 !((priv)->pfunc.func) ? 0 : \
71 (priv)->pfunc.func(args))
72
73 /*
74 * common functions
75 */
76 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
77 {
78 return ioread16(priv->base + reg);
79 }
80
81 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
82 {
83 iowrite16(data, priv->base + reg);
84 }
85
86 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
87 {
88 u16 val = usbhs_read(priv, reg);
89
90 val &= ~mask;
91 val |= data & mask;
92
93 usbhs_write(priv, reg, val);
94 }
95
96 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
97 {
98 return dev_get_drvdata(&pdev->dev);
99 }
100
101 /*
102 * syscfg functions
103 */
104 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
105 {
106 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
107 }
108
109 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
110 {
111 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
112 u16 val = DCFM | DRPD | HSE | USBE;
113 int has_otg = usbhs_get_dparam(priv, has_otg);
114
115 if (has_otg)
116 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
117
118 /*
119 * if enable
120 *
121 * - select Host mode
122 * - D+ Line/D- Line Pull-down
123 */
124 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
125 }
126
127 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
128 {
129 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
130 u16 val = HSE | USBE;
131
132 /*
133 * if enable
134 *
135 * - select Function mode
136 * - D+ Line Pull-up is disabled
137 * When D+ Line Pull-up is enabled,
138 * calling usbhs_sys_function_pullup(,1)
139 */
140 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
141 }
142
143 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
144 {
145 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
146 }
147
148 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
149 {
150 usbhs_write(priv, TESTMODE, mode);
151 }
152
153 /*
154 * frame functions
155 */
156 int usbhs_frame_get_num(struct usbhs_priv *priv)
157 {
158 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
159 }
160
161 /*
162 * usb request functions
163 */
164 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
165 {
166 u16 val;
167
168 val = usbhs_read(priv, USBREQ);
169 req->bRequest = (val >> 8) & 0xFF;
170 req->bRequestType = (val >> 0) & 0xFF;
171
172 req->wValue = usbhs_read(priv, USBVAL);
173 req->wIndex = usbhs_read(priv, USBINDX);
174 req->wLength = usbhs_read(priv, USBLENG);
175 }
176
177 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
178 {
179 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
180 usbhs_write(priv, USBVAL, req->wValue);
181 usbhs_write(priv, USBINDX, req->wIndex);
182 usbhs_write(priv, USBLENG, req->wLength);
183
184 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
185 }
186
187 /*
188 * bus/vbus functions
189 */
190 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
191 {
192 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
193
194 if (status != USBRST) {
195 struct device *dev = usbhs_priv_to_dev(priv);
196 dev_err(dev, "usbhs should be reset\n");
197 }
198
199 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
200 }
201
202 void usbhs_bus_send_reset(struct usbhs_priv *priv)
203 {
204 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
205 }
206
207 int usbhs_bus_get_speed(struct usbhs_priv *priv)
208 {
209 u16 dvstctr = usbhs_read(priv, DVSTCTR);
210
211 switch (RHST & dvstctr) {
212 case RHST_LOW_SPEED:
213 return USB_SPEED_LOW;
214 case RHST_FULL_SPEED:
215 return USB_SPEED_FULL;
216 case RHST_HIGH_SPEED:
217 return USB_SPEED_HIGH;
218 }
219
220 return USB_SPEED_UNKNOWN;
221 }
222
223 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
224 {
225 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
226
227 return usbhs_platform_call(priv, set_vbus, pdev, enable);
228 }
229
230 static void usbhsc_bus_init(struct usbhs_priv *priv)
231 {
232 usbhs_write(priv, DVSTCTR, 0);
233
234 usbhs_vbus_ctrl(priv, 0);
235 }
236
237 /*
238 * device configuration
239 */
240 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
241 u16 upphub, u16 hubport, u16 speed)
242 {
243 struct device *dev = usbhs_priv_to_dev(priv);
244 u16 usbspd = 0;
245 u32 reg = DEVADD0 + (2 * devnum);
246
247 if (devnum > 10) {
248 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
249 return -EIO;
250 }
251
252 if (upphub > 0xA) {
253 dev_err(dev, "unsupported hub number %d\n", upphub);
254 return -EIO;
255 }
256
257 switch (speed) {
258 case USB_SPEED_LOW:
259 usbspd = USBSPD_SPEED_LOW;
260 break;
261 case USB_SPEED_FULL:
262 usbspd = USBSPD_SPEED_FULL;
263 break;
264 case USB_SPEED_HIGH:
265 usbspd = USBSPD_SPEED_HIGH;
266 break;
267 default:
268 dev_err(dev, "unsupported speed %d\n", speed);
269 return -EIO;
270 }
271
272 usbhs_write(priv, reg, UPPHUB(upphub) |
273 HUBPORT(hubport)|
274 USBSPD(usbspd));
275
276 return 0;
277 }
278
279 /*
280 * interrupt functions
281 */
282 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
283 {
284 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
285
286 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
287 }
288
289 /*
290 * local functions
291 */
292 static void usbhsc_set_buswait(struct usbhs_priv *priv)
293 {
294 int wait = usbhs_get_dparam(priv, buswait_bwait);
295
296 /* set bus wait if platform have */
297 if (wait)
298 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
299 }
300
301 /*
302 * platform default param
303 */
304
305 /* commonly used on old SH-Mobile SoCs */
306 static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
307 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
308 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
309 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
310 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
311 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
312 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
313 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
314 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
315 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
316 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
317 };
318
319 /* commonly used on newer SH-Mobile and R-Car SoCs */
320 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
321 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
322 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
323 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
324 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
325 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
326 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
327 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
328 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
329 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
330 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
331 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
332 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
333 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
334 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
335 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
336 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
337 };
338
339 /*
340 * power control
341 */
342 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
343 {
344 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
345 struct device *dev = usbhs_priv_to_dev(priv);
346
347 if (enable) {
348 /* enable PM */
349 pm_runtime_get_sync(dev);
350
351 /* enable platform power */
352 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
353
354 /* USB on */
355 usbhs_sys_clock_ctrl(priv, enable);
356 } else {
357 /* USB off */
358 usbhs_sys_clock_ctrl(priv, enable);
359
360 /* disable platform power */
361 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
362
363 /* disable PM */
364 pm_runtime_put_sync(dev);
365 }
366 }
367
368 /*
369 * hotplug
370 */
371 static void usbhsc_hotplug(struct usbhs_priv *priv)
372 {
373 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
374 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
375 int id;
376 int enable;
377 int cable;
378 int ret;
379
380 /*
381 * get vbus status from platform
382 */
383 enable = usbhs_platform_call(priv, get_vbus, pdev);
384
385 /*
386 * get id from platform
387 */
388 id = usbhs_platform_call(priv, get_id, pdev);
389
390 if (enable && !mod) {
391 if (priv->edev) {
392 cable = extcon_get_cable_state_(priv->edev, EXTCON_USB_HOST);
393 if ((cable > 0 && id != USBHS_HOST) ||
394 (!cable && id != USBHS_GADGET)) {
395 dev_info(&pdev->dev,
396 "USB cable plugged in doesn't match the selected role!\n");
397 return;
398 }
399 }
400
401 ret = usbhs_mod_change(priv, id);
402 if (ret < 0)
403 return;
404
405 dev_dbg(&pdev->dev, "%s enable\n", __func__);
406
407 /* power on */
408 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
409 usbhsc_power_ctrl(priv, enable);
410
411 /* bus init */
412 usbhsc_set_buswait(priv);
413 usbhsc_bus_init(priv);
414
415 /* module start */
416 usbhs_mod_call(priv, start, priv);
417
418 } else if (!enable && mod) {
419 dev_dbg(&pdev->dev, "%s disable\n", __func__);
420
421 /* module stop */
422 usbhs_mod_call(priv, stop, priv);
423
424 /* bus init */
425 usbhsc_bus_init(priv);
426
427 /* power off */
428 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
429 usbhsc_power_ctrl(priv, enable);
430
431 usbhs_mod_change(priv, -1);
432
433 /* reset phy for next connection */
434 usbhs_platform_call(priv, phy_reset, pdev);
435 }
436 }
437
438 /*
439 * notify hotplug
440 */
441 static void usbhsc_notify_hotplug(struct work_struct *work)
442 {
443 struct usbhs_priv *priv = container_of(work,
444 struct usbhs_priv,
445 notify_hotplug_work.work);
446 usbhsc_hotplug(priv);
447 }
448
449 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
450 {
451 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
452 int delay = usbhs_get_dparam(priv, detection_delay);
453
454 /*
455 * This functions will be called in interrupt.
456 * To make sure safety context,
457 * use workqueue for usbhs_notify_hotplug
458 */
459 schedule_delayed_work(&priv->notify_hotplug_work,
460 msecs_to_jiffies(delay));
461 return 0;
462 }
463
464 /*
465 * platform functions
466 */
467 static const struct of_device_id usbhs_of_match[] = {
468 {
469 .compatible = "renesas,usbhs-r8a7790",
470 .data = (void *)USBHS_TYPE_RCAR_GEN2,
471 },
472 {
473 .compatible = "renesas,usbhs-r8a7791",
474 .data = (void *)USBHS_TYPE_RCAR_GEN2,
475 },
476 {
477 .compatible = "renesas,usbhs-r8a7794",
478 .data = (void *)USBHS_TYPE_RCAR_GEN2,
479 },
480 {
481 .compatible = "renesas,usbhs-r8a7795",
482 .data = (void *)USBHS_TYPE_RCAR_GEN3,
483 },
484 {
485 .compatible = "renesas,rcar-gen2-usbhs",
486 .data = (void *)USBHS_TYPE_RCAR_GEN2,
487 },
488 {
489 .compatible = "renesas,rcar-gen3-usbhs",
490 .data = (void *)USBHS_TYPE_RCAR_GEN3,
491 },
492 { },
493 };
494 MODULE_DEVICE_TABLE(of, usbhs_of_match);
495
496 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
497 {
498 struct renesas_usbhs_platform_info *info;
499 struct renesas_usbhs_driver_param *dparam;
500 const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
501 u32 tmp;
502 int gpio;
503
504 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
505 if (!info)
506 return NULL;
507
508 dparam = &info->driver_param;
509 dparam->type = of_id ? (uintptr_t)of_id->data : 0;
510 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
511 dparam->buswait_bwait = tmp;
512 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
513 NULL);
514 if (gpio > 0)
515 dparam->enable_gpio = gpio;
516
517 if (dparam->type == USBHS_TYPE_RCAR_GEN2)
518 dparam->has_usb_dmac = 1;
519
520 return info;
521 }
522
523 static int usbhs_probe(struct platform_device *pdev)
524 {
525 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
526 struct renesas_usbhs_driver_callback *dfunc;
527 struct usbhs_priv *priv;
528 struct resource *res, *irq_res;
529 int ret;
530
531 /* check device node */
532 if (pdev->dev.of_node)
533 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
534
535 /* check platform information */
536 if (!info) {
537 dev_err(&pdev->dev, "no platform information\n");
538 return -EINVAL;
539 }
540
541 /* platform data */
542 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
543 if (!irq_res) {
544 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
545 return -ENODEV;
546 }
547
548 /* usb private data */
549 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
550 if (!priv)
551 return -ENOMEM;
552
553 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
554 priv->base = devm_ioremap_resource(&pdev->dev, res);
555 if (IS_ERR(priv->base))
556 return PTR_ERR(priv->base);
557
558 if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
559 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
560 if (IS_ERR(priv->edev))
561 return PTR_ERR(priv->edev);
562 }
563
564 /*
565 * care platform info
566 */
567
568 memcpy(&priv->dparam,
569 &info->driver_param,
570 sizeof(struct renesas_usbhs_driver_param));
571
572 switch (priv->dparam.type) {
573 case USBHS_TYPE_RCAR_GEN2:
574 priv->pfunc = usbhs_rcar2_ops;
575 if (!priv->dparam.pipe_configs) {
576 priv->dparam.pipe_configs = usbhsc_new_pipe;
577 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
578 }
579 break;
580 case USBHS_TYPE_RCAR_GEN3:
581 priv->pfunc = usbhs_rcar3_ops;
582 if (!priv->dparam.pipe_configs) {
583 priv->dparam.pipe_configs = usbhsc_new_pipe;
584 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
585 }
586 break;
587 default:
588 if (!info->platform_callback.get_id) {
589 dev_err(&pdev->dev, "no platform callbacks");
590 return -EINVAL;
591 }
592 memcpy(&priv->pfunc,
593 &info->platform_callback,
594 sizeof(struct renesas_usbhs_platform_callback));
595 break;
596 }
597
598 /* set driver callback functions for platform */
599 dfunc = &info->driver_callback;
600 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
601
602 /* set default param if platform doesn't have */
603 if (!priv->dparam.pipe_configs) {
604 priv->dparam.pipe_configs = usbhsc_default_pipe;
605 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
606 }
607 if (!priv->dparam.pio_dma_border)
608 priv->dparam.pio_dma_border = 64; /* 64byte */
609
610 /* FIXME */
611 /* runtime power control ? */
612 if (priv->pfunc.get_vbus)
613 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
614
615 /*
616 * priv settings
617 */
618 priv->irq = irq_res->start;
619 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
620 priv->irqflags = IRQF_SHARED;
621 priv->pdev = pdev;
622 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
623 spin_lock_init(usbhs_priv_to_lock(priv));
624
625 /* call pipe and module init */
626 ret = usbhs_pipe_probe(priv);
627 if (ret < 0)
628 return ret;
629
630 ret = usbhs_fifo_probe(priv);
631 if (ret < 0)
632 goto probe_end_pipe_exit;
633
634 ret = usbhs_mod_probe(priv);
635 if (ret < 0)
636 goto probe_end_fifo_exit;
637
638 /* dev_set_drvdata should be called after usbhs_mod_init */
639 platform_set_drvdata(pdev, priv);
640
641 /*
642 * deviece reset here because
643 * USB device might be used in boot loader.
644 */
645 usbhs_sys_clock_ctrl(priv, 0);
646
647 /* check GPIO determining if USB function should be enabled */
648 if (priv->dparam.enable_gpio) {
649 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
650 ret = !gpio_get_value(priv->dparam.enable_gpio);
651 gpio_free(priv->dparam.enable_gpio);
652 if (ret) {
653 dev_warn(&pdev->dev,
654 "USB function not selected (GPIO %d)\n",
655 priv->dparam.enable_gpio);
656 ret = -ENOTSUPP;
657 goto probe_end_mod_exit;
658 }
659 }
660
661 /*
662 * platform call
663 *
664 * USB phy setup might depend on CPU/Board.
665 * If platform has its callback functions,
666 * call it here.
667 */
668 ret = usbhs_platform_call(priv, hardware_init, pdev);
669 if (ret < 0) {
670 dev_err(&pdev->dev, "platform init failed.\n");
671 goto probe_end_mod_exit;
672 }
673
674 /* reset phy for connection */
675 usbhs_platform_call(priv, phy_reset, pdev);
676
677 /* power control */
678 pm_runtime_enable(&pdev->dev);
679 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
680 usbhsc_power_ctrl(priv, 1);
681 usbhs_mod_autonomy_mode(priv);
682 }
683
684 /*
685 * manual call notify_hotplug for cold plug
686 */
687 usbhsc_drvcllbck_notify_hotplug(pdev);
688
689 dev_info(&pdev->dev, "probed\n");
690
691 return ret;
692
693 probe_end_mod_exit:
694 usbhs_mod_remove(priv);
695 probe_end_fifo_exit:
696 usbhs_fifo_remove(priv);
697 probe_end_pipe_exit:
698 usbhs_pipe_remove(priv);
699
700 dev_info(&pdev->dev, "probe failed\n");
701
702 return ret;
703 }
704
705 static int usbhs_remove(struct platform_device *pdev)
706 {
707 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
708 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
709 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
710
711 dev_dbg(&pdev->dev, "usb remove\n");
712
713 dfunc->notify_hotplug = NULL;
714
715 /* power off */
716 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
717 usbhsc_power_ctrl(priv, 0);
718
719 pm_runtime_disable(&pdev->dev);
720
721 usbhs_platform_call(priv, hardware_exit, pdev);
722 usbhs_mod_remove(priv);
723 usbhs_fifo_remove(priv);
724 usbhs_pipe_remove(priv);
725
726 return 0;
727 }
728
729 static int usbhsc_suspend(struct device *dev)
730 {
731 struct usbhs_priv *priv = dev_get_drvdata(dev);
732 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
733
734 if (mod) {
735 usbhs_mod_call(priv, stop, priv);
736 usbhs_mod_change(priv, -1);
737 }
738
739 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
740 usbhsc_power_ctrl(priv, 0);
741
742 return 0;
743 }
744
745 static int usbhsc_resume(struct device *dev)
746 {
747 struct usbhs_priv *priv = dev_get_drvdata(dev);
748 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
749
750 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
751 usbhsc_power_ctrl(priv, 1);
752
753 usbhs_platform_call(priv, phy_reset, pdev);
754
755 usbhsc_drvcllbck_notify_hotplug(pdev);
756
757 return 0;
758 }
759
760 static int usbhsc_runtime_nop(struct device *dev)
761 {
762 /* Runtime PM callback shared between ->runtime_suspend()
763 * and ->runtime_resume(). Simply returns success.
764 *
765 * This driver re-initializes all registers after
766 * pm_runtime_get_sync() anyway so there is no need
767 * to save and restore registers here.
768 */
769 return 0;
770 }
771
772 static const struct dev_pm_ops usbhsc_pm_ops = {
773 .suspend = usbhsc_suspend,
774 .resume = usbhsc_resume,
775 .runtime_suspend = usbhsc_runtime_nop,
776 .runtime_resume = usbhsc_runtime_nop,
777 };
778
779 static struct platform_driver renesas_usbhs_driver = {
780 .driver = {
781 .name = "renesas_usbhs",
782 .pm = &usbhsc_pm_ops,
783 .of_match_table = of_match_ptr(usbhs_of_match),
784 },
785 .probe = usbhs_probe,
786 .remove = usbhs_remove,
787 };
788
789 module_platform_driver(renesas_usbhs_driver);
790
791 MODULE_LICENSE("GPL");
792 MODULE_DESCRIPTION("Renesas USB driver");
793 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
Linux kernel - Deliverables
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