Version:  2.0.40 2.2.26 2.4.37 3.4 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

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  *              local functions
280  */
281 static void usbhsc_set_buswait(struct usbhs_priv *priv)
282 {
283         int wait = usbhs_get_dparam(priv, buswait_bwait);
284 
285         /* set bus wait if platform have */
286         if (wait)
287                 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
288 }
289 
290 /*
291  *              platform default param
292  */
293 
294 /* commonly used on old SH-Mobile SoCs */
295 static u32 usbhsc_default_pipe_type[] = {
296                 USB_ENDPOINT_XFER_CONTROL,
297                 USB_ENDPOINT_XFER_ISOC,
298                 USB_ENDPOINT_XFER_ISOC,
299                 USB_ENDPOINT_XFER_BULK,
300                 USB_ENDPOINT_XFER_BULK,
301                 USB_ENDPOINT_XFER_BULK,
302                 USB_ENDPOINT_XFER_INT,
303                 USB_ENDPOINT_XFER_INT,
304                 USB_ENDPOINT_XFER_INT,
305                 USB_ENDPOINT_XFER_INT,
306 };
307 
308 /* commonly used on newer SH-Mobile and R-Car SoCs */
309 static u32 usbhsc_new_pipe_type[] = {
310                 USB_ENDPOINT_XFER_CONTROL,
311                 USB_ENDPOINT_XFER_ISOC,
312                 USB_ENDPOINT_XFER_ISOC,
313                 USB_ENDPOINT_XFER_BULK,
314                 USB_ENDPOINT_XFER_BULK,
315                 USB_ENDPOINT_XFER_BULK,
316                 USB_ENDPOINT_XFER_INT,
317                 USB_ENDPOINT_XFER_INT,
318                 USB_ENDPOINT_XFER_INT,
319                 USB_ENDPOINT_XFER_BULK,
320                 USB_ENDPOINT_XFER_BULK,
321                 USB_ENDPOINT_XFER_BULK,
322                 USB_ENDPOINT_XFER_BULK,
323                 USB_ENDPOINT_XFER_BULK,
324                 USB_ENDPOINT_XFER_BULK,
325                 USB_ENDPOINT_XFER_BULK,
326 };
327 
328 /*
329  *              power control
330  */
331 static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
332 {
333         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
334         struct device *dev = usbhs_priv_to_dev(priv);
335 
336         if (enable) {
337                 /* enable PM */
338                 pm_runtime_get_sync(dev);
339 
340                 /* enable platform power */
341                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
342 
343                 /* USB on */
344                 usbhs_sys_clock_ctrl(priv, enable);
345         } else {
346                 /* USB off */
347                 usbhs_sys_clock_ctrl(priv, enable);
348 
349                 /* disable platform power */
350                 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
351 
352                 /* disable PM */
353                 pm_runtime_put_sync(dev);
354         }
355 }
356 
357 /*
358  *              hotplug
359  */
360 static void usbhsc_hotplug(struct usbhs_priv *priv)
361 {
362         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
363         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
364         int id;
365         int enable;
366         int cable;
367         int ret;
368 
369         /*
370          * get vbus status from platform
371          */
372         enable = usbhs_platform_call(priv, get_vbus, pdev);
373 
374         /*
375          * get id from platform
376          */
377         id = usbhs_platform_call(priv, get_id, pdev);
378 
379         if (enable && !mod) {
380                 if (priv->edev) {
381                         cable = extcon_get_cable_state(priv->edev, "USB-HOST");
382                         if ((cable > 0 && id != USBHS_HOST) ||
383                             (!cable && id != USBHS_GADGET)) {
384                                 dev_info(&pdev->dev,
385                                          "USB cable plugged in doesn't match the selected role!\n");
386                                 return;
387                         }
388                 }
389 
390                 ret = usbhs_mod_change(priv, id);
391                 if (ret < 0)
392                         return;
393 
394                 dev_dbg(&pdev->dev, "%s enable\n", __func__);
395 
396                 /* power on */
397                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
398                         usbhsc_power_ctrl(priv, enable);
399 
400                 /* bus init */
401                 usbhsc_set_buswait(priv);
402                 usbhsc_bus_init(priv);
403 
404                 /* module start */
405                 usbhs_mod_call(priv, start, priv);
406 
407         } else if (!enable && mod) {
408                 dev_dbg(&pdev->dev, "%s disable\n", __func__);
409 
410                 /* module stop */
411                 usbhs_mod_call(priv, stop, priv);
412 
413                 /* bus init */
414                 usbhsc_bus_init(priv);
415 
416                 /* power off */
417                 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
418                         usbhsc_power_ctrl(priv, enable);
419 
420                 usbhs_mod_change(priv, -1);
421 
422                 /* reset phy for next connection */
423                 usbhs_platform_call(priv, phy_reset, pdev);
424         }
425 }
426 
427 /*
428  *              notify hotplug
429  */
430 static void usbhsc_notify_hotplug(struct work_struct *work)
431 {
432         struct usbhs_priv *priv = container_of(work,
433                                                struct usbhs_priv,
434                                                notify_hotplug_work.work);
435         usbhsc_hotplug(priv);
436 }
437 
438 static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
439 {
440         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
441         int delay = usbhs_get_dparam(priv, detection_delay);
442 
443         /*
444          * This functions will be called in interrupt.
445          * To make sure safety context,
446          * use workqueue for usbhs_notify_hotplug
447          */
448         schedule_delayed_work(&priv->notify_hotplug_work,
449                               msecs_to_jiffies(delay));
450         return 0;
451 }
452 
453 /*
454  *              platform functions
455  */
456 static const struct of_device_id usbhs_of_match[] = {
457         {
458                 .compatible = "renesas,usbhs-r8a7790",
459                 .data = (void *)USBHS_TYPE_R8A7790,
460         },
461         {
462                 .compatible = "renesas,usbhs-r8a7791",
463                 .data = (void *)USBHS_TYPE_R8A7791,
464         },
465         { },
466 };
467 MODULE_DEVICE_TABLE(of, usbhs_of_match);
468 
469 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
470 {
471         struct renesas_usbhs_platform_info *info;
472         struct renesas_usbhs_driver_param *dparam;
473         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
474         u32 tmp;
475         int gpio;
476 
477         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
478         if (!info)
479                 return NULL;
480 
481         dparam = &info->driver_param;
482         dparam->type = of_id ? (u32)of_id->data : 0;
483         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
484                 dparam->buswait_bwait = tmp;
485         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
486                                        NULL);
487         if (gpio > 0)
488                 dparam->enable_gpio = gpio;
489 
490         return info;
491 }
492 
493 static int usbhs_probe(struct platform_device *pdev)
494 {
495         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
496         struct renesas_usbhs_driver_callback *dfunc;
497         struct usbhs_priv *priv;
498         struct resource *res, *irq_res;
499         int ret;
500 
501         /* check device node */
502         if (pdev->dev.of_node)
503                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
504 
505         /* check platform information */
506         if (!info) {
507                 dev_err(&pdev->dev, "no platform information\n");
508                 return -EINVAL;
509         }
510 
511         /* platform data */
512         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
513         if (!irq_res) {
514                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
515                 return -ENODEV;
516         }
517 
518         /* usb private data */
519         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
520         if (!priv)
521                 return -ENOMEM;
522 
523         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
524         priv->base = devm_ioremap_resource(&pdev->dev, res);
525         if (IS_ERR(priv->base))
526                 return PTR_ERR(priv->base);
527 
528         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
529                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
530                 if (IS_ERR(priv->edev))
531                         return PTR_ERR(priv->edev);
532         }
533 
534         /*
535          * care platform info
536          */
537 
538         memcpy(&priv->dparam,
539                &info->driver_param,
540                sizeof(struct renesas_usbhs_driver_param));
541 
542         switch (priv->dparam.type) {
543         case USBHS_TYPE_R8A7790:
544         case USBHS_TYPE_R8A7791:
545                 priv->pfunc = usbhs_rcar2_ops;
546                 if (!priv->dparam.pipe_type) {
547                         priv->dparam.pipe_type = usbhsc_new_pipe_type;
548                         priv->dparam.pipe_size =
549                                 ARRAY_SIZE(usbhsc_new_pipe_type);
550                 }
551                 break;
552         default:
553                 if (!info->platform_callback.get_id) {
554                         dev_err(&pdev->dev, "no platform callbacks");
555                         return -EINVAL;
556                 }
557                 memcpy(&priv->pfunc,
558                        &info->platform_callback,
559                        sizeof(struct renesas_usbhs_platform_callback));
560                 break;
561         }
562 
563         /* set driver callback functions for platform */
564         dfunc                   = &info->driver_callback;
565         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
566 
567         /* set default param if platform doesn't have */
568         if (!priv->dparam.pipe_type) {
569                 priv->dparam.pipe_type = usbhsc_default_pipe_type;
570                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe_type);
571         }
572         if (!priv->dparam.pio_dma_border)
573                 priv->dparam.pio_dma_border = 64; /* 64byte */
574 
575         /* FIXME */
576         /* runtime power control ? */
577         if (priv->pfunc.get_vbus)
578                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
579 
580         /*
581          * priv settings
582          */
583         priv->irq       = irq_res->start;
584         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
585                 priv->irqflags = IRQF_SHARED;
586         priv->pdev      = pdev;
587         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
588         spin_lock_init(usbhs_priv_to_lock(priv));
589 
590         /* call pipe and module init */
591         ret = usbhs_pipe_probe(priv);
592         if (ret < 0)
593                 return ret;
594 
595         ret = usbhs_fifo_probe(priv);
596         if (ret < 0)
597                 goto probe_end_pipe_exit;
598 
599         ret = usbhs_mod_probe(priv);
600         if (ret < 0)
601                 goto probe_end_fifo_exit;
602 
603         /* dev_set_drvdata should be called after usbhs_mod_init */
604         platform_set_drvdata(pdev, priv);
605 
606         /*
607          * deviece reset here because
608          * USB device might be used in boot loader.
609          */
610         usbhs_sys_clock_ctrl(priv, 0);
611 
612         /* check GPIO determining if USB function should be enabled */
613         if (priv->dparam.enable_gpio) {
614                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
615                 ret = !gpio_get_value(priv->dparam.enable_gpio);
616                 gpio_free(priv->dparam.enable_gpio);
617                 if (ret) {
618                         dev_warn(&pdev->dev,
619                                  "USB function not selected (GPIO %d)\n",
620                                  priv->dparam.enable_gpio);
621                         ret = -ENOTSUPP;
622                         goto probe_end_mod_exit;
623                 }
624         }
625 
626         /*
627          * platform call
628          *
629          * USB phy setup might depend on CPU/Board.
630          * If platform has its callback functions,
631          * call it here.
632          */
633         ret = usbhs_platform_call(priv, hardware_init, pdev);
634         if (ret < 0) {
635                 dev_err(&pdev->dev, "platform init failed.\n");
636                 goto probe_end_mod_exit;
637         }
638 
639         /* reset phy for connection */
640         usbhs_platform_call(priv, phy_reset, pdev);
641 
642         /* power control */
643         pm_runtime_enable(&pdev->dev);
644         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
645                 usbhsc_power_ctrl(priv, 1);
646                 usbhs_mod_autonomy_mode(priv);
647         }
648 
649         /*
650          * manual call notify_hotplug for cold plug
651          */
652         usbhsc_drvcllbck_notify_hotplug(pdev);
653 
654         dev_info(&pdev->dev, "probed\n");
655 
656         return ret;
657 
658 probe_end_mod_exit:
659         usbhs_mod_remove(priv);
660 probe_end_fifo_exit:
661         usbhs_fifo_remove(priv);
662 probe_end_pipe_exit:
663         usbhs_pipe_remove(priv);
664 
665         dev_info(&pdev->dev, "probe failed\n");
666 
667         return ret;
668 }
669 
670 static int usbhs_remove(struct platform_device *pdev)
671 {
672         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
673         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
674         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
675 
676         dev_dbg(&pdev->dev, "usb remove\n");
677 
678         dfunc->notify_hotplug = NULL;
679 
680         /* power off */
681         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
682                 usbhsc_power_ctrl(priv, 0);
683 
684         pm_runtime_disable(&pdev->dev);
685 
686         usbhs_platform_call(priv, hardware_exit, pdev);
687         usbhs_mod_remove(priv);
688         usbhs_fifo_remove(priv);
689         usbhs_pipe_remove(priv);
690 
691         return 0;
692 }
693 
694 static int usbhsc_suspend(struct device *dev)
695 {
696         struct usbhs_priv *priv = dev_get_drvdata(dev);
697         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
698 
699         if (mod) {
700                 usbhs_mod_call(priv, stop, priv);
701                 usbhs_mod_change(priv, -1);
702         }
703 
704         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
705                 usbhsc_power_ctrl(priv, 0);
706 
707         return 0;
708 }
709 
710 static int usbhsc_resume(struct device *dev)
711 {
712         struct usbhs_priv *priv = dev_get_drvdata(dev);
713         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
714 
715         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
716                 usbhsc_power_ctrl(priv, 1);
717 
718         usbhs_platform_call(priv, phy_reset, pdev);
719 
720         usbhsc_drvcllbck_notify_hotplug(pdev);
721 
722         return 0;
723 }
724 
725 static int usbhsc_runtime_nop(struct device *dev)
726 {
727         /* Runtime PM callback shared between ->runtime_suspend()
728          * and ->runtime_resume(). Simply returns success.
729          *
730          * This driver re-initializes all registers after
731          * pm_runtime_get_sync() anyway so there is no need
732          * to save and restore registers here.
733          */
734         return 0;
735 }
736 
737 static const struct dev_pm_ops usbhsc_pm_ops = {
738         .suspend                = usbhsc_suspend,
739         .resume                 = usbhsc_resume,
740         .runtime_suspend        = usbhsc_runtime_nop,
741         .runtime_resume         = usbhsc_runtime_nop,
742 };
743 
744 static struct platform_driver renesas_usbhs_driver = {
745         .driver         = {
746                 .name   = "renesas_usbhs",
747                 .pm     = &usbhsc_pm_ops,
748                 .of_match_table = of_match_ptr(usbhs_of_match),
749         },
750         .probe          = usbhs_probe,
751         .remove         = usbhs_remove,
752 };
753 
754 module_platform_driver(renesas_usbhs_driver);
755 
756 MODULE_LICENSE("GPL");
757 MODULE_DESCRIPTION("Renesas USB driver");
758 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
759 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us