Version:  2.0.40 2.2.26 2.4.37 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 4.2 4.3 4.4 4.5

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 struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
306         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
307         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
308         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
309         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
310         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
311         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
312         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
313         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
314         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
315         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
316 };
317 
318 /* commonly used on newer SH-Mobile and R-Car SoCs */
319 static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
320         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
321         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
322         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
323         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
324         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
325         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
326         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
327         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
328         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
329         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
330         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
331         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
332         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
333         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
334         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
335         RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
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, EXTCON_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_RCAR_GEN2,
470         },
471         {
472                 .compatible = "renesas,usbhs-r8a7791",
473                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
474         },
475         {
476                 .compatible = "renesas,usbhs-r8a7794",
477                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
478         },
479         {
480                 /* Gen3 is compatible with Gen2 */
481                 .compatible = "renesas,usbhs-r8a7795",
482                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
483         },
484         {
485                 .compatible = "renesas,rcar-gen2-usbhs",
486                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
487         },
488         {
489                 /* Gen3 is compatible with Gen2 */
490                 .compatible = "renesas,rcar-gen3-usbhs",
491                 .data = (void *)USBHS_TYPE_RCAR_GEN2,
492         },
493         { },
494 };
495 MODULE_DEVICE_TABLE(of, usbhs_of_match);
496 
497 static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
498 {
499         struct renesas_usbhs_platform_info *info;
500         struct renesas_usbhs_driver_param *dparam;
501         const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
502         u32 tmp;
503         int gpio;
504 
505         info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
506         if (!info)
507                 return NULL;
508 
509         dparam = &info->driver_param;
510         dparam->type = of_id ? (uintptr_t)of_id->data : 0;
511         if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
512                 dparam->buswait_bwait = tmp;
513         gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
514                                        NULL);
515         if (gpio > 0)
516                 dparam->enable_gpio = gpio;
517 
518         if (dparam->type == USBHS_TYPE_RCAR_GEN2)
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         default:
582                 if (!info->platform_callback.get_id) {
583                         dev_err(&pdev->dev, "no platform callbacks");
584                         return -EINVAL;
585                 }
586                 memcpy(&priv->pfunc,
587                        &info->platform_callback,
588                        sizeof(struct renesas_usbhs_platform_callback));
589                 break;
590         }
591 
592         /* set driver callback functions for platform */
593         dfunc                   = &info->driver_callback;
594         dfunc->notify_hotplug   = usbhsc_drvcllbck_notify_hotplug;
595 
596         /* set default param if platform doesn't have */
597         if (!priv->dparam.pipe_configs) {
598                 priv->dparam.pipe_configs = usbhsc_default_pipe;
599                 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
600         }
601         if (!priv->dparam.pio_dma_border)
602                 priv->dparam.pio_dma_border = 64; /* 64byte */
603 
604         /* FIXME */
605         /* runtime power control ? */
606         if (priv->pfunc.get_vbus)
607                 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
608 
609         /*
610          * priv settings
611          */
612         priv->irq       = irq_res->start;
613         if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
614                 priv->irqflags = IRQF_SHARED;
615         priv->pdev      = pdev;
616         INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
617         spin_lock_init(usbhs_priv_to_lock(priv));
618 
619         /* call pipe and module init */
620         ret = usbhs_pipe_probe(priv);
621         if (ret < 0)
622                 return ret;
623 
624         ret = usbhs_fifo_probe(priv);
625         if (ret < 0)
626                 goto probe_end_pipe_exit;
627 
628         ret = usbhs_mod_probe(priv);
629         if (ret < 0)
630                 goto probe_end_fifo_exit;
631 
632         /* dev_set_drvdata should be called after usbhs_mod_init */
633         platform_set_drvdata(pdev, priv);
634 
635         /*
636          * deviece reset here because
637          * USB device might be used in boot loader.
638          */
639         usbhs_sys_clock_ctrl(priv, 0);
640 
641         /* check GPIO determining if USB function should be enabled */
642         if (priv->dparam.enable_gpio) {
643                 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
644                 ret = !gpio_get_value(priv->dparam.enable_gpio);
645                 gpio_free(priv->dparam.enable_gpio);
646                 if (ret) {
647                         dev_warn(&pdev->dev,
648                                  "USB function not selected (GPIO %d)\n",
649                                  priv->dparam.enable_gpio);
650                         ret = -ENOTSUPP;
651                         goto probe_end_mod_exit;
652                 }
653         }
654 
655         /*
656          * platform call
657          *
658          * USB phy setup might depend on CPU/Board.
659          * If platform has its callback functions,
660          * call it here.
661          */
662         ret = usbhs_platform_call(priv, hardware_init, pdev);
663         if (ret < 0) {
664                 dev_err(&pdev->dev, "platform init failed.\n");
665                 goto probe_end_mod_exit;
666         }
667 
668         /* reset phy for connection */
669         usbhs_platform_call(priv, phy_reset, pdev);
670 
671         /* power control */
672         pm_runtime_enable(&pdev->dev);
673         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
674                 usbhsc_power_ctrl(priv, 1);
675                 usbhs_mod_autonomy_mode(priv);
676         }
677 
678         /*
679          * manual call notify_hotplug for cold plug
680          */
681         usbhsc_drvcllbck_notify_hotplug(pdev);
682 
683         dev_info(&pdev->dev, "probed\n");
684 
685         return ret;
686 
687 probe_end_mod_exit:
688         usbhs_mod_remove(priv);
689 probe_end_fifo_exit:
690         usbhs_fifo_remove(priv);
691 probe_end_pipe_exit:
692         usbhs_pipe_remove(priv);
693 
694         dev_info(&pdev->dev, "probe failed\n");
695 
696         return ret;
697 }
698 
699 static int usbhs_remove(struct platform_device *pdev)
700 {
701         struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
702         struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
703         struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
704 
705         dev_dbg(&pdev->dev, "usb remove\n");
706 
707         dfunc->notify_hotplug = NULL;
708 
709         /* power off */
710         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
711                 usbhsc_power_ctrl(priv, 0);
712 
713         pm_runtime_disable(&pdev->dev);
714 
715         usbhs_platform_call(priv, hardware_exit, pdev);
716         usbhs_mod_remove(priv);
717         usbhs_fifo_remove(priv);
718         usbhs_pipe_remove(priv);
719 
720         return 0;
721 }
722 
723 static int usbhsc_suspend(struct device *dev)
724 {
725         struct usbhs_priv *priv = dev_get_drvdata(dev);
726         struct usbhs_mod *mod = usbhs_mod_get_current(priv);
727 
728         if (mod) {
729                 usbhs_mod_call(priv, stop, priv);
730                 usbhs_mod_change(priv, -1);
731         }
732 
733         if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
734                 usbhsc_power_ctrl(priv, 0);
735 
736         return 0;
737 }
738 
739 static int usbhsc_resume(struct device *dev)
740 {
741         struct usbhs_priv *priv = dev_get_drvdata(dev);
742         struct platform_device *pdev = usbhs_priv_to_pdev(priv);
743 
744         if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
745                 usbhsc_power_ctrl(priv, 1);
746 
747         usbhs_platform_call(priv, phy_reset, pdev);
748 
749         usbhsc_drvcllbck_notify_hotplug(pdev);
750 
751         return 0;
752 }
753 
754 static int usbhsc_runtime_nop(struct device *dev)
755 {
756         /* Runtime PM callback shared between ->runtime_suspend()
757          * and ->runtime_resume(). Simply returns success.
758          *
759          * This driver re-initializes all registers after
760          * pm_runtime_get_sync() anyway so there is no need
761          * to save and restore registers here.
762          */
763         return 0;
764 }
765 
766 static const struct dev_pm_ops usbhsc_pm_ops = {
767         .suspend                = usbhsc_suspend,
768         .resume                 = usbhsc_resume,
769         .runtime_suspend        = usbhsc_runtime_nop,
770         .runtime_resume         = usbhsc_runtime_nop,
771 };
772 
773 static struct platform_driver renesas_usbhs_driver = {
774         .driver         = {
775                 .name   = "renesas_usbhs",
776                 .pm     = &usbhsc_pm_ops,
777                 .of_match_table = of_match_ptr(usbhs_of_match),
778         },
779         .probe          = usbhs_probe,
780         .remove         = usbhs_remove,
781 };
782 
783 module_platform_driver(renesas_usbhs_driver);
784 
785 MODULE_LICENSE("GPL");
786 MODULE_DESCRIPTION("Renesas USB driver");
787 MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
788 

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