Version:  2.0.40 2.2.26 2.4.37 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1

Linux/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 
 29 /*
 30  *              image of renesas_usbhs
 31  *
 32  * ex) gadget case
 33 
 34  * mod.c
 35  * mod_gadget.c
 36  * mod_host.c           pipe.c          fifo.c
 37  *
 38  *                      +-------+       +-----------+
 39  *                      | pipe0 |------>| fifo pio  |
 40  * +------------+       +-------+       +-----------+
 41  * | mod_gadget |=====> | pipe1 |--+
 42  * +------------+       +-------+  |    +-----------+
 43  *                      | pipe2 |  |  +-| fifo dma0 |
 44  * +------------+       +-------+  |  | +-----------+
 45  * | mod_host   |       | pipe3 |<-|--+
 46  * +------------+       +-------+  |    +-----------+
 47  *                      | ....  |  +--->| fifo dma1 |
 48  *                      | ....  |       +-----------+
 49  */
 50 
 51 
 52 #define USBHSF_RUNTIME_PWCTRL   (1 << 0)
 53 
 54 /* status */
 55 #define usbhsc_flags_init(p)   do {(p)->flags = 0; } while (0)
 56 #define usbhsc_flags_set(p, b) ((p)->flags |=  (b))
 57 #define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
 58 #define usbhsc_flags_has(p, b) ((p)->flags &   (b))
 59 
 60 /*
 61  * platform call back
 62  *
 63  * renesas usb support platform callback function.
 64  * Below macro call it.
 65  * if platform doesn't have callback, it return 0 (no error)
 66  */
 67 #define usbhs_platform_call(priv, func, args...)\
 68         (!(priv) ? -ENODEV :                    \
 69          !((priv)->pfunc.func) ? 0 :            \
 70          (priv)->pfunc.func(args))
 71 
 72 /*
 73  *              common functions
 74  */
 75 u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
 76 {
 77         return ioread16(priv->base + reg);
 78 }
 79 
 80 void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
 81 {
 82         iowrite16(data, priv->base + reg);
 83 }
 84 
 85 void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
 86 {
 87         u16 val = usbhs_read(priv, reg);
 88 
 89         val &= ~mask;
 90         val |= data & mask;
 91 
 92         usbhs_write(priv, reg, val);
 93 }
 94 
 95 struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
 96 {
 97         return dev_get_drvdata(&pdev->dev);
 98 }
 99 
100 /*
101  *              syscfg functions
102  */
103 static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
104 {
105         usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
106 }
107 
108 void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
109 {
110         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
111         u16 val  = DCFM | DRPD | HSE | USBE;
112         int has_otg = usbhs_get_dparam(priv, has_otg);
113 
114         if (has_otg)
115                 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
116 
117         /*
118          * if enable
119          *
120          * - select Host mode
121          * - D+ Line/D- Line Pull-down
122          */
123         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
124 }
125 
126 void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
127 {
128         u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
129         u16 val  = HSE | USBE;
130 
131         /*
132          * if enable
133          *
134          * - select Function mode
135          * - D+ Line Pull-up is disabled
136          *      When D+ Line Pull-up is enabled,
137          *      calling usbhs_sys_function_pullup(,1)
138          */
139         usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
140 }
141 
142 void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
143 {
144         usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
145 }
146 
147 void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
148 {
149         usbhs_write(priv, TESTMODE, mode);
150 }
151 
152 /*
153  *              frame functions
154  */
155 int usbhs_frame_get_num(struct usbhs_priv *priv)
156 {
157         return usbhs_read(priv, FRMNUM) & FRNM_MASK;
158 }
159 
160 /*
161  *              usb request functions
162  */
163 void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
164 {
165         u16 val;
166 
167         val = usbhs_read(priv, USBREQ);
168         req->bRequest           = (val >> 8) & 0xFF;
169         req->bRequestType       = (val >> 0) & 0xFF;
170 
171         req->wValue     = usbhs_read(priv, USBVAL);
172         req->wIndex     = usbhs_read(priv, USBINDX);
173         req->wLength    = usbhs_read(priv, USBLENG);
174 }
175 
176 void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
177 {
178         usbhs_write(priv, USBREQ,  (req->bRequest << 8) | req->bRequestType);
179         usbhs_write(priv, USBVAL,  req->wValue);
180         usbhs_write(priv, USBINDX, req->wIndex);
181         usbhs_write(priv, USBLENG, req->wLength);
182 
183         usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
184 }
185 
186 /*
187  *              bus/vbus functions
188  */
189 void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
190 {
191         u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
192 
193         if (status != USBRST) {
194                 struct device *dev = usbhs_priv_to_dev(priv);
195                 dev_err(dev, "usbhs should be reset\n");
196         }
197 
198         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
199 }
200 
201 void usbhs_bus_send_reset(struct usbhs_priv *priv)
202 {
203         usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
204 }
205 
206 int usbhs_bus_get_speed(struct usbhs_priv *priv)
207 {
208         u16 dvstctr = usbhs_read(priv, DVSTCTR);
209 
210         switch (RHST & dvstctr) {
211         case RHST_LOW_SPEED:
212                 return USB_SPEED_LOW;
213         case RHST_FULL_SPEED:
214                 return USB_SPEED_FULL;
215         case RHST_HIGH_SPEED:
216                 return USB_SPEED_HIGH;
217         }
218 
219         return USB_SPEED_UNKNOWN;
220 }
221 
222 int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
223 {
224         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
225 
226         return usbhs_platform_call(priv, set_vbus, pdev, enable);
227 }
228 
229 static void usbhsc_bus_init(struct usbhs_priv *priv)
230 {
231         usbhs_write(priv, DVSTCTR, 0);
232 
233         usbhs_vbus_ctrl(priv, 0);
234 }
235 
236 /*
237  *              device configuration
238  */
239 int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
240                            u16 upphub, u16 hubport, u16 speed)
241 {
242         struct device *dev = usbhs_priv_to_dev(priv);
243         u16 usbspd = 0;
244         u32 reg = DEVADD0 + (2 * devnum);
245 
246         if (devnum > 10) {
247                 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
248                 return -EIO;
249         }
250 
251         if (upphub > 0xA) {
252                 dev_err(dev, "unsupported hub number %d\n", upphub);
253                 return -EIO;
254         }
255 
256         switch (speed) {
257         case USB_SPEED_LOW:
258                 usbspd = USBSPD_SPEED_LOW;
259                 break;
260         case USB_SPEED_FULL:
261                 usbspd = USBSPD_SPEED_FULL;
262                 break;
263         case USB_SPEED_HIGH:
264                 usbspd = USBSPD_SPEED_HIGH;
265                 break;
266         default:
267                 dev_err(dev, "unsupported speed %d\n", speed);
268                 return -EIO;
269         }
270 
271         usbhs_write(priv, reg,  UPPHUB(upphub)  |
272                                 HUBPORT(hubport)|
273                                 USBSPD(usbspd));
274 
275         return 0;
276 }
277 
278 /*
279  *              interrupt functions
280  */
281 void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
282 {
283         u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
284 
285         usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
286 }
287 
288 /*
289  *              local functions
290  */
291 static void usbhsc_set_buswait(struct usbhs_priv *priv)
292 {
293         int wait = usbhs_get_dparam(priv, buswait_bwait);
294 
295         /* set bus wait if platform have */
296         if (wait)
297                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
298 }
299 
300 /*
301  *              platform default param
302  */
303 
304 /* commonly used on old SH-Mobile SoCs */
305 static u32 usbhsc_default_pipe_type[] = {
306                 USB_ENDPOINT_XFER_CONTROL,
307                 USB_ENDPOINT_XFER_ISOC,
308                 USB_ENDPOINT_XFER_ISOC,
309                 USB_ENDPOINT_XFER_BULK,
310                 USB_ENDPOINT_XFER_BULK,
311                 USB_ENDPOINT_XFER_BULK,
312                 USB_ENDPOINT_XFER_INT,
313                 USB_ENDPOINT_XFER_INT,
314                 USB_ENDPOINT_XFER_INT,
315                 USB_ENDPOINT_XFER_INT,
316 };
317 
318 /* commonly used on newer SH-Mobile and R-Car SoCs */
319 static u32 usbhsc_new_pipe_type[] = {
320                 USB_ENDPOINT_XFER_CONTROL,
321                 USB_ENDPOINT_XFER_ISOC,
322                 USB_ENDPOINT_XFER_ISOC,
323                 USB_ENDPOINT_XFER_BULK,
324                 USB_ENDPOINT_XFER_BULK,
325                 USB_ENDPOINT_XFER_BULK,
326                 USB_ENDPOINT_XFER_INT,
327                 USB_ENDPOINT_XFER_INT,
328                 USB_ENDPOINT_XFER_INT,
329                 USB_ENDPOINT_XFER_BULK,
330                 USB_ENDPOINT_XFER_BULK,
331                 USB_ENDPOINT_XFER_BULK,
332                 USB_ENDPOINT_XFER_BULK,
333                 USB_ENDPOINT_XFER_BULK,
334                 USB_ENDPOINT_XFER_BULK,
335                 USB_ENDPOINT_XFER_BULK,
336 };
337 
338 /*
339  *              power control
340  */
341 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
342 {
343         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
344         struct device *dev = usbhs_priv_to_dev(priv);
345 
346         if (enable) {
347                 /* enable PM */
348                 pm_runtime_get_sync(dev);
349 
350                 /* enable platform power */
351                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
352 
353                 /* USB on */
354                 usbhs_sys_clock_ctrl(priv, enable);
355         } else {
356                 /* USB off */
357                 usbhs_sys_clock_ctrl(priv, enable);
358 
359                 /* disable platform power */
360                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
361 
362                 /* disable PM */
363                 pm_runtime_put_sync(dev);
364         }
365 }
366 
367 /*
368  *              hotplug
369  */
370 static void usbhsc_hotplug(struct usbhs_priv *priv)
371 {
372         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
373         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
374         int id;
375         int enable;
376         int cable;
377         int ret;
378 
379         /*
380          * get vbus status from platform
381          */
382         enable = usbhs_platform_call(priv, get_vbus, pdev);
383 
384         /*
385          * get id from platform
386          */
387         id = usbhs_platform_call(priv, get_id, pdev);
388 
389         if (enable && !mod) {
390                 if (priv->edev) {
391                         cable = extcon_get_cable_state(priv->edev, "USB-HOST");
392                         if ((cable > 0 && id != USBHS_HOST) ||
393                             (!cable && id != USBHS_GADGET)) {
394                                 dev_info(&pdev->dev,
395                                          "USB cable plugged in doesn't match the selected role!\n");
396                                 return;
397                         }
398                 }
399 
400                 ret = usbhs_mod_change(priv, id);
401                 if (ret < 0)
402                         return;
403 
404                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
405 
406                 /* power on */
407                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
408                         usbhsc_power_ctrl(priv, enable);
409 
410                 /* bus init */
411                 usbhsc_set_buswait(priv);
412                 usbhsc_bus_init(priv);
413 
414                 /* module start */
415                 usbhs_mod_call(priv, start, priv);
416 
417         } else if (!enable && mod) {
418                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
419 
420                 /* module stop */
421                 usbhs_mod_call(priv, stop, priv);
422 
423                 /* bus init */
424                 usbhsc_bus_init(priv);
425 
426                 /* power off */
427                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
428                         usbhsc_power_ctrl(priv, enable);
429 
430                 usbhs_mod_change(priv, -1);
431 
432                 /* reset phy for next connection */
433                 usbhs_platform_call(priv, phy_reset, pdev);
434         }
435 }
436 
437 /*
438  *              notify hotplug
439  */
440 static void usbhsc_notify_hotplug(struct work_struct *work)
441 {
442         struct usbhs_priv *priv = container_of(work,
443                                                struct usbhs_priv,
444                                                notify_hotplug_work.work);
445         usbhsc_hotplug(priv);
446 }
447 
448 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
449 {
450         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
451         int delay = usbhs_get_dparam(priv, detection_delay);
452 
453         /*
454          * This functions will be called in interrupt.
455          * To make sure safety context,
456          * use workqueue for usbhs_notify_hotplug
457          */
458         schedule_delayed_work(&priv->notify_hotplug_work,
459                               msecs_to_jiffies(delay));
460         return 0;
461 }
462 
463 /*
464  *              platform functions
465  */
466 static const struct of_device_id usbhs_of_match[] = {
467         {
468                 .compatible = "renesas,usbhs-r8a7790",
469                 .data = (void *)USBHS_TYPE_R8A7790,
470         },
471         {
472                 .compatible = "renesas,usbhs-r8a7791",
473                 .data = (void *)USBHS_TYPE_R8A7791,
474         },
475         { },
476 };
477 MODULE_DEVICE_TABLE(of, usbhs_of_match);
478 
479 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
480 {
481         struct renesas_usbhs_platform_info *info;
482         struct renesas_usbhs_driver_param *dparam;
483         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
484         u32 tmp;
485         int gpio;
486 
487         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
488         if (!info)
489                 return NULL;
490 
491         dparam = &info->driver_param;
492         dparam->type = of_id ? (u32)of_id->data : 0;
493         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
494                 dparam->buswait_bwait = tmp;
495         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
496                                        NULL);
497         if (gpio > 0)
498                 dparam->enable_gpio = gpio;
499 
500         switch (dparam->type) {
501         case USBHS_TYPE_R8A7790:
502         case USBHS_TYPE_R8A7791:
503                 dparam->has_usb_dmac = 1;
504                 break;
505         default:
506                 break;
507         }
508 
509         return info;
510 }
511 
512 static int usbhs_probe(struct platform_device *pdev)
513 {
514         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
515         struct renesas_usbhs_driver_callback *dfunc;
516         struct usbhs_priv *priv;
517         struct resource *res, *irq_res;
518         int ret;
519 
520         /* check device node */
521         if (pdev->dev.of_node)
522                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
523 
524         /* check platform information */
525         if (!info) {
526                 dev_err(&pdev->dev, "no platform information\n");
527                 return -EINVAL;
528         }
529 
530         /* platform data */
531         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
532         if (!irq_res) {
533                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
534                 return -ENODEV;
535         }
536 
537         /* usb private data */
538         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
539         if (!priv)
540                 return -ENOMEM;
541 
542         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
543         priv->base = devm_ioremap_resource(&pdev->dev, res);
544         if (IS_ERR(priv->base))
545                 return PTR_ERR(priv->base);
546 
547         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
548                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
549                 if (IS_ERR(priv->edev))
550                         return PTR_ERR(priv->edev);
551         }
552 
553         /*
554          * care platform info
555          */
556 
557         memcpy(&priv->dparam,
558                &info->driver_param,
559                sizeof(struct renesas_usbhs_driver_param));
560 
561         switch (priv->dparam.type) {
562         case USBHS_TYPE_R8A7790:
563         case USBHS_TYPE_R8A7791:
564                 priv->pfunc = usbhs_rcar2_ops;
565                 if (!priv->dparam.pipe_type) {
566                         priv->dparam.pipe_type = usbhsc_new_pipe_type;
567                         priv->dparam.pipe_size =
568                                 ARRAY_SIZE(usbhsc_new_pipe_type);
569                 }
570                 break;
571         default:
572                 if (!info->platform_callback.get_id) {
573                         dev_err(&pdev->dev, "no platform callbacks");
574                         return -EINVAL;
575                 }
576                 memcpy(&priv->pfunc,
577                        &info->platform_callback,
578                        sizeof(struct renesas_usbhs_platform_callback));
579                 break;
580         }
581 
582         /* set driver callback functions for platform */
583         dfunc                   = &info->driver_callback;
584         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
585 
586         /* set default param if platform doesn't have */
587         if (!priv->dparam.pipe_type) {
588                 priv->dparam.pipe_type = usbhsc_default_pipe_type;
589                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
590         }
591         if (!priv->dparam.pio_dma_border)
592                 priv->dparam.pio_dma_border = 64; /* 64byte */
593 
594         /* FIXME */
595         /* runtime power control ? */
596         if (priv->pfunc.get_vbus)
597                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
598 
599         /*
600          * priv settings
601          */
602         priv->irq       = irq_res->start;
603         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
604                 priv->irqflags = IRQF_SHARED;
605         priv->pdev      = pdev;
606         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
607         spin_lock_init(usbhs_priv_to_lock(priv));
608 
609         /* call pipe and module init */
610         ret = usbhs_pipe_probe(priv);
611         if (ret < 0)
612                 return ret;
613 
614         ret = usbhs_fifo_probe(priv);
615         if (ret < 0)
616                 goto probe_end_pipe_exit;
617 
618         ret = usbhs_mod_probe(priv);
619         if (ret < 0)
620                 goto probe_end_fifo_exit;
621 
622         /* dev_set_drvdata should be called after usbhs_mod_init */
623         platform_set_drvdata(pdev, priv);
624 
625         /*
626          * deviece reset here because
627          * USB device might be used in boot loader.
628          */
629         usbhs_sys_clock_ctrl(priv, 0);
630 
631         /* check GPIO determining if USB function should be enabled */
632         if (priv->dparam.enable_gpio) {
633                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
634                 ret = !gpio_get_value(priv->dparam.enable_gpio);
635                 gpio_free(priv->dparam.enable_gpio);
636                 if (ret) {
637                         dev_warn(&pdev->dev,
638                                  "USB function not selected (GPIO %d)\n",
639                                  priv->dparam.enable_gpio);
640                         ret = -ENOTSUPP;
641                         goto probe_end_mod_exit;
642                 }
643         }
644 
645         /*
646          * platform call
647          *
648          * USB phy setup might depend on CPU/Board.
649          * If platform has its callback functions,
650          * call it here.
651          */
652         ret = usbhs_platform_call(priv, hardware_init, pdev);
653         if (ret < 0) {
654                 dev_err(&pdev->dev, "platform init failed.\n");
655                 goto probe_end_mod_exit;
656         }
657 
658         /* reset phy for connection */
659         usbhs_platform_call(priv, phy_reset, pdev);
660 
661         /* power control */
662         pm_runtime_enable(&pdev->dev);
663         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
664                 usbhsc_power_ctrl(priv, 1);
665                 usbhs_mod_autonomy_mode(priv);
666         }
667 
668         /*
669          * manual call notify_hotplug for cold plug
670          */
671         usbhsc_drvcllbck_notify_hotplug(pdev);
672 
673         dev_info(&pdev->dev, "probed\n");
674 
675         return ret;
676 
677 probe_end_mod_exit:
678         usbhs_mod_remove(priv);
679 probe_end_fifo_exit:
680         usbhs_fifo_remove(priv);
681 probe_end_pipe_exit:
682         usbhs_pipe_remove(priv);
683 
684         dev_info(&pdev->dev, "probe failed\n");
685 
686         return ret;
687 }
688 
689 static int usbhs_remove(struct platform_device *pdev)
690 {
691         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
692         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
693         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
694 
695         dev_dbg(&pdev->dev, "usb remove\n");
696 
697         dfunc->notify_hotplug = NULL;
698 
699         /* power off */
700         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
701                 usbhsc_power_ctrl(priv, 0);
702 
703         pm_runtime_disable(&pdev->dev);
704 
705         usbhs_platform_call(priv, hardware_exit, pdev);
706         usbhs_mod_remove(priv);
707         usbhs_fifo_remove(priv);
708         usbhs_pipe_remove(priv);
709 
710         return 0;
711 }
712 
713 static int usbhsc_suspend(struct device *dev)
714 {
715         struct usbhs_priv *priv = dev_get_drvdata(dev);
716         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
717 
718         if (mod) {
719                 usbhs_mod_call(priv, stop, priv);
720                 usbhs_mod_change(priv, -1);
721         }
722 
723         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
724                 usbhsc_power_ctrl(priv, 0);
725 
726         return 0;
727 }
728 
729 static int usbhsc_resume(struct device *dev)
730 {
731         struct usbhs_priv *priv = dev_get_drvdata(dev);
732         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
733 
734         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
735                 usbhsc_power_ctrl(priv, 1);
736 
737         usbhs_platform_call(priv, phy_reset, pdev);
738 
739         usbhsc_drvcllbck_notify_hotplug(pdev);
740 
741         return 0;
742 }
743 
744 static int usbhsc_runtime_nop(struct device *dev)
745 {
746         /* Runtime PM callback shared between ->runtime_suspend()
747          * and ->runtime_resume(). Simply returns success.
748          *
749          * This driver re-initializes all registers after
750          * pm_runtime_get_sync() anyway so there is no need
751          * to save and restore registers here.
752          */
753         return 0;
754 }
755 
756 static const struct dev_pm_ops usbhsc_pm_ops = {
757         .suspend                = usbhsc_suspend,
758         .resume                 = usbhsc_resume,
759         .runtime_suspend        = usbhsc_runtime_nop,
760         .runtime_resume         = usbhsc_runtime_nop,
761 };
762 
763 static struct platform_driver renesas_usbhs_driver = {
764         .driver         = {
765                 .name   = "renesas_usbhs",
766                 .pm     = &usbhsc_pm_ops,
767                 .of_match_table = of_match_ptr(usbhs_of_match),
768         },
769         .probe          = usbhs_probe,
770         .remove         = usbhs_remove,
771 };
772 
773 module_platform_driver(renesas_usbhs_driver);
774 
775 MODULE_LICENSE("GPL");
776 MODULE_DESCRIPTION("Renesas USB driver");
777 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
778 

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