Version:  2.0.40 2.2.26 2.4.37 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8

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 #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->type == USBHS_TYPE_RCAR_GEN3)
519                 dparam->has_usb_dmac = 1;
520 
521         return info;
522 }
523 
524 static int usbhs_probe(struct platform_device *pdev)
525 {
526         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
527         struct renesas_usbhs_driver_callback *dfunc;
528         struct usbhs_priv *priv;
529         struct resource *res, *irq_res;
530         int ret;
531 
532         /* check device node */
533         if (pdev->dev.of_node)
534                 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
535 
536         /* check platform information */
537         if (!info) {
538                 dev_err(&pdev->dev, "no platform information\n");
539                 return -EINVAL;
540         }
541 
542         /* platform data */
543         irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
544         if (!irq_res) {
545                 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
546                 return -ENODEV;
547         }
548 
549         /* usb private data */
550         priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
551         if (!priv)
552                 return -ENOMEM;
553 
554         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
555         priv->base = devm_ioremap_resource(&pdev->dev, res);
556         if (IS_ERR(priv->base))
557                 return PTR_ERR(priv->base);
558 
559         if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
560                 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
561                 if (IS_ERR(priv->edev))
562                         return PTR_ERR(priv->edev);
563         }
564 
565         /*
566          * care platform info
567          */
568 
569         memcpy(&priv->dparam,
570                &info->driver_param,
571                sizeof(struct renesas_usbhs_driver_param));
572 
573         switch (priv->dparam.type) {
574         case USBHS_TYPE_RCAR_GEN2:
575                 priv->pfunc = usbhs_rcar2_ops;
576                 if (!priv->dparam.pipe_configs) {
577                         priv->dparam.pipe_configs = usbhsc_new_pipe;
578                         priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
579                 }
580                 break;
581         case USBHS_TYPE_RCAR_GEN3:
582                 priv->pfunc = usbhs_rcar3_ops;
583                 if (!priv->dparam.pipe_configs) {
584                         priv->dparam.pipe_configs = usbhsc_new_pipe;
585                         priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
586                 }
587                 break;
588         default:
589                 if (!info->platform_callback.get_id) {
590                         dev_err(&pdev->dev, "no platform callbacks");
591                         return -EINVAL;
592                 }
593                 memcpy(&priv->pfunc,
594                        &info->platform_callback,
595                        sizeof(struct renesas_usbhs_platform_callback));
596                 break;
597         }
598 
599         /* set driver callback functions for platform */
600         dfunc                   = &info->driver_callback;
601         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
602 
603         /* set default param if platform doesn't have */
604         if (!priv->dparam.pipe_configs) {
605                 priv->dparam.pipe_configs = usbhsc_default_pipe;
606                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
607         }
608         if (!priv->dparam.pio_dma_border)
609                 priv->dparam.pio_dma_border = 64; /* 64byte */
610 
611         /* FIXME */
612         /* runtime power control ? */
613         if (priv->pfunc.get_vbus)
614                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
615 
616         /*
617          * priv settings
618          */
619         priv->irq       = irq_res->start;
620         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
621                 priv->irqflags = IRQF_SHARED;
622         priv->pdev      = pdev;
623         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
624         spin_lock_init(usbhs_priv_to_lock(priv));
625 
626         /* call pipe and module init */
627         ret = usbhs_pipe_probe(priv);
628         if (ret < 0)
629                 return ret;
630 
631         ret = usbhs_fifo_probe(priv);
632         if (ret < 0)
633                 goto probe_end_pipe_exit;
634 
635         ret = usbhs_mod_probe(priv);
636         if (ret < 0)
637                 goto probe_end_fifo_exit;
638 
639         /* dev_set_drvdata should be called after usbhs_mod_init */
640         platform_set_drvdata(pdev, priv);
641 
642         /*
643          * deviece reset here because
644          * USB device might be used in boot loader.
645          */
646         usbhs_sys_clock_ctrl(priv, 0);
647 
648         /* check GPIO determining if USB function should be enabled */
649         if (priv->dparam.enable_gpio) {
650                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
651                 ret = !gpio_get_value(priv->dparam.enable_gpio);
652                 gpio_free(priv->dparam.enable_gpio);
653                 if (ret) {
654                         dev_warn(&pdev->dev,
655                                  "USB function not selected (GPIO %d)\n",
656                                  priv->dparam.enable_gpio);
657                         ret = -ENOTSUPP;
658                         goto probe_end_mod_exit;
659                 }
660         }
661 
662         /*
663          * platform call
664          *
665          * USB phy setup might depend on CPU/Board.
666          * If platform has its callback functions,
667          * call it here.
668          */
669         ret = usbhs_platform_call(priv, hardware_init, pdev);
670         if (ret < 0) {
671                 dev_err(&pdev->dev, "platform init failed.\n");
672                 goto probe_end_mod_exit;
673         }
674 
675         /* reset phy for connection */
676         usbhs_platform_call(priv, phy_reset, pdev);
677 
678         /* power control */
679         pm_runtime_enable(&pdev->dev);
680         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
681                 usbhsc_power_ctrl(priv, 1);
682                 usbhs_mod_autonomy_mode(priv);
683         }
684 
685         /*
686          * manual call notify_hotplug for cold plug
687          */
688         usbhsc_drvcllbck_notify_hotplug(pdev);
689 
690         dev_info(&pdev->dev, "probed\n");
691 
692         return ret;
693 
694 probe_end_mod_exit:
695         usbhs_mod_remove(priv);
696 probe_end_fifo_exit:
697         usbhs_fifo_remove(priv);
698 probe_end_pipe_exit:
699         usbhs_pipe_remove(priv);
700 
701         dev_info(&pdev->dev, "probe failed (%d)\n", ret);
702 
703         return ret;
704 }
705 
706 static int usbhs_remove(struct platform_device *pdev)
707 {
708         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
709         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
710         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
711 
712         dev_dbg(&pdev->dev, "usb remove\n");
713 
714         dfunc->notify_hotplug = NULL;
715 
716         /* power off */
717         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
718                 usbhsc_power_ctrl(priv, 0);
719 
720         pm_runtime_disable(&pdev->dev);
721 
722         usbhs_platform_call(priv, hardware_exit, pdev);
723         usbhs_mod_remove(priv);
724         usbhs_fifo_remove(priv);
725         usbhs_pipe_remove(priv);
726 
727         return 0;
728 }
729 
730 static int usbhsc_suspend(struct device *dev)
731 {
732         struct usbhs_priv *priv = dev_get_drvdata(dev);
733         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
734 
735         if (mod) {
736                 usbhs_mod_call(priv, stop, priv);
737                 usbhs_mod_change(priv, -1);
738         }
739 
740         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
741                 usbhsc_power_ctrl(priv, 0);
742 
743         return 0;
744 }
745 
746 static int usbhsc_resume(struct device *dev)
747 {
748         struct usbhs_priv *priv = dev_get_drvdata(dev);
749         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
750 
751         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
752                 usbhsc_power_ctrl(priv, 1);
753 
754         usbhs_platform_call(priv, phy_reset, pdev);
755 
756         usbhsc_drvcllbck_notify_hotplug(pdev);
757 
758         return 0;
759 }
760 
761 static int usbhsc_runtime_nop(struct device *dev)
762 {
763         /* Runtime PM callback shared between ->runtime_suspend()
764          * and ->runtime_resume(). Simply returns success.
765          *
766          * This driver re-initializes all registers after
767          * pm_runtime_get_sync() anyway so there is no need
768          * to save and restore registers here.
769          */
770         return 0;
771 }
772 
773 static const struct dev_pm_ops usbhsc_pm_ops = {
774         .suspend                = usbhsc_suspend,
775         .resume                 = usbhsc_resume,
776         .runtime_suspend        = usbhsc_runtime_nop,
777         .runtime_resume         = usbhsc_runtime_nop,
778 };
779 
780 static struct platform_driver renesas_usbhs_driver = {
781         .driver         = {
782                 .name   = "renesas_usbhs",
783                 .pm     = &usbhsc_pm_ops,
784                 .of_match_table = of_match_ptr(usbhs_of_match),
785         },
786         .probe          = usbhs_probe,
787         .remove         = usbhs_remove,
788 };
789 
790 module_platform_driver(renesas_usbhs_driver);
791 
792 MODULE_LICENSE("GPL");
793 MODULE_DESCRIPTION("Renesas USB driver");
794 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
795 

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