Loading...
1// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Copyright (C) 2019 Renesas Electronics Corporation
7 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
8 */
9#include <linux/clk.h>
10#include <linux/err.h>
11#include <linux/gpio.h>
12#include <linux/io.h>
13#include <linux/module.h>
14#include <linux/of_device.h>
15#include <linux/of_gpio.h>
16#include <linux/pm_runtime.h>
17#include <linux/reset.h>
18#include <linux/slab.h>
19#include <linux/sysfs.h>
20#include "common.h"
21#include "rcar2.h"
22#include "rcar3.h"
23#include "rza.h"
24
25/*
26 * image of renesas_usbhs
27 *
28 * ex) gadget case
29
30 * mod.c
31 * mod_gadget.c
32 * mod_host.c pipe.c fifo.c
33 *
34 * +-------+ +-----------+
35 * | pipe0 |------>| fifo pio |
36 * +------------+ +-------+ +-----------+
37 * | mod_gadget |=====> | pipe1 |--+
38 * +------------+ +-------+ | +-----------+
39 * | pipe2 | | +-| fifo dma0 |
40 * +------------+ +-------+ | | +-----------+
41 * | mod_host | | pipe3 |<-|--+
42 * +------------+ +-------+ | +-----------+
43 * | .... | +--->| fifo dma1 |
44 * | .... | +-----------+
45 */
46
47/*
48 * platform call back
49 *
50 * renesas usb support platform callback function.
51 * Below macro call it.
52 * if platform doesn't have callback, it return 0 (no error)
53 */
54#define usbhs_platform_call(priv, func, args...)\
55 (!(priv) ? -ENODEV : \
56 !((priv)->pfunc->func) ? 0 : \
57 (priv)->pfunc->func(args))
58
59/*
60 * common functions
61 */
62u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
63{
64 return ioread16(priv->base + reg);
65}
66
67void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
68{
69 iowrite16(data, priv->base + reg);
70}
71
72void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
73{
74 u16 val = usbhs_read(priv, reg);
75
76 val &= ~mask;
77 val |= data & mask;
78
79 usbhs_write(priv, reg, val);
80}
81
82struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
83{
84 return dev_get_drvdata(&pdev->dev);
85}
86
87int usbhs_get_id_as_gadget(struct platform_device *pdev)
88{
89 return USBHS_GADGET;
90}
91
92/*
93 * syscfg functions
94 */
95static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
96{
97 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
98}
99
100void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
101{
102 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
103 u16 val = DCFM | DRPD | HSE | USBE;
104
105 /*
106 * if enable
107 *
108 * - select Host mode
109 * - D+ Line/D- Line Pull-down
110 */
111 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
112}
113
114void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
115{
116 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
117 u16 val = HSE | USBE;
118
119 /* CNEN bit is required for function operation */
120 if (usbhs_get_dparam(priv, has_cnen)) {
121 mask |= CNEN;
122 val |= CNEN;
123 }
124
125 /*
126 * if enable
127 *
128 * - select Function mode
129 * - D+ Line Pull-up is disabled
130 * When D+ Line Pull-up is enabled,
131 * calling usbhs_sys_function_pullup(,1)
132 */
133 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
134}
135
136void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
137{
138 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
139}
140
141void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
142{
143 usbhs_write(priv, TESTMODE, mode);
144}
145
146/*
147 * frame functions
148 */
149int usbhs_frame_get_num(struct usbhs_priv *priv)
150{
151 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
152}
153
154/*
155 * usb request functions
156 */
157void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
158{
159 u16 val;
160
161 val = usbhs_read(priv, USBREQ);
162 req->bRequest = (val >> 8) & 0xFF;
163 req->bRequestType = (val >> 0) & 0xFF;
164
165 req->wValue = cpu_to_le16(usbhs_read(priv, USBVAL));
166 req->wIndex = cpu_to_le16(usbhs_read(priv, USBINDX));
167 req->wLength = cpu_to_le16(usbhs_read(priv, USBLENG));
168}
169
170void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
171{
172 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
173 usbhs_write(priv, USBVAL, le16_to_cpu(req->wValue));
174 usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex));
175 usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength));
176
177 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
178}
179
180/*
181 * bus/vbus functions
182 */
183void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
184{
185 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
186
187 if (status != USBRST) {
188 struct device *dev = usbhs_priv_to_dev(priv);
189 dev_err(dev, "usbhs should be reset\n");
190 }
191
192 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
193}
194
195void usbhs_bus_send_reset(struct usbhs_priv *priv)
196{
197 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
198}
199
200int usbhs_bus_get_speed(struct usbhs_priv *priv)
201{
202 u16 dvstctr = usbhs_read(priv, DVSTCTR);
203
204 switch (RHST & dvstctr) {
205 case RHST_LOW_SPEED:
206 return USB_SPEED_LOW;
207 case RHST_FULL_SPEED:
208 return USB_SPEED_FULL;
209 case RHST_HIGH_SPEED:
210 return USB_SPEED_HIGH;
211 }
212
213 return USB_SPEED_UNKNOWN;
214}
215
216int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
217{
218 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
219
220 return usbhs_platform_call(priv, set_vbus, pdev, enable);
221}
222
223static void usbhsc_bus_init(struct usbhs_priv *priv)
224{
225 usbhs_write(priv, DVSTCTR, 0);
226
227 usbhs_vbus_ctrl(priv, 0);
228}
229
230/*
231 * device configuration
232 */
233int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
234 u16 upphub, u16 hubport, u16 speed)
235{
236 struct device *dev = usbhs_priv_to_dev(priv);
237 u16 usbspd = 0;
238 u32 reg = DEVADD0 + (2 * devnum);
239
240 if (devnum > 10) {
241 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
242 return -EIO;
243 }
244
245 if (upphub > 0xA) {
246 dev_err(dev, "unsupported hub number %d\n", upphub);
247 return -EIO;
248 }
249
250 switch (speed) {
251 case USB_SPEED_LOW:
252 usbspd = USBSPD_SPEED_LOW;
253 break;
254 case USB_SPEED_FULL:
255 usbspd = USBSPD_SPEED_FULL;
256 break;
257 case USB_SPEED_HIGH:
258 usbspd = USBSPD_SPEED_HIGH;
259 break;
260 default:
261 dev_err(dev, "unsupported speed %d\n", speed);
262 return -EIO;
263 }
264
265 usbhs_write(priv, reg, UPPHUB(upphub) |
266 HUBPORT(hubport)|
267 USBSPD(usbspd));
268
269 return 0;
270}
271
272/*
273 * interrupt functions
274 */
275void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
276{
277 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
278
279 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
280}
281
282/*
283 * local functions
284 */
285static void usbhsc_set_buswait(struct usbhs_priv *priv)
286{
287 int wait = usbhs_get_dparam(priv, buswait_bwait);
288
289 /* set bus wait if platform have */
290 if (wait)
291 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
292}
293
294static bool usbhsc_is_multi_clks(struct usbhs_priv *priv)
295{
296 return priv->dparam.multi_clks;
297}
298
299static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv)
300{
301 if (!usbhsc_is_multi_clks(priv))
302 return 0;
303
304 /* The first clock should exist */
305 priv->clks[0] = of_clk_get(dev_of_node(dev), 0);
306 if (IS_ERR(priv->clks[0]))
307 return PTR_ERR(priv->clks[0]);
308
309 /*
310 * To backward compatibility with old DT, this driver checks the return
311 * value if it's -ENOENT or not.
312 */
313 priv->clks[1] = of_clk_get(dev_of_node(dev), 1);
314 if (PTR_ERR(priv->clks[1]) == -ENOENT)
315 priv->clks[1] = NULL;
316 else if (IS_ERR(priv->clks[1]))
317 return PTR_ERR(priv->clks[1]);
318
319 return 0;
320}
321
322static void usbhsc_clk_put(struct usbhs_priv *priv)
323{
324 int i;
325
326 if (!usbhsc_is_multi_clks(priv))
327 return;
328
329 for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
330 clk_put(priv->clks[i]);
331}
332
333static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv)
334{
335 int i, ret;
336
337 if (!usbhsc_is_multi_clks(priv))
338 return 0;
339
340 for (i = 0; i < ARRAY_SIZE(priv->clks); i++) {
341 ret = clk_prepare_enable(priv->clks[i]);
342 if (ret) {
343 while (--i >= 0)
344 clk_disable_unprepare(priv->clks[i]);
345 return ret;
346 }
347 }
348
349 return ret;
350}
351
352static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv)
353{
354 int i;
355
356 if (!usbhsc_is_multi_clks(priv))
357 return;
358
359 for (i = 0; i < ARRAY_SIZE(priv->clks); i++)
360 clk_disable_unprepare(priv->clks[i]);
361}
362
363/*
364 * platform default param
365 */
366
367/* commonly used on old SH-Mobile SoCs */
368static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
369 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
370 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
371 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
372 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
373 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
374 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
375 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
376 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
377 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
378 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
379};
380
381/* commonly used on newer SH-Mobile and R-Car SoCs */
382static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
383 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
384 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
385 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
386 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
387 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
388 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
389 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
390 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
391 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
392 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
393 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
394 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
395 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
396 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
397 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
398 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
399};
400
401/*
402 * power control
403 */
404static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
405{
406 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
407 struct device *dev = usbhs_priv_to_dev(priv);
408
409 if (enable) {
410 /* enable PM */
411 pm_runtime_get_sync(dev);
412
413 /* enable clks */
414 if (usbhsc_clk_prepare_enable(priv))
415 return;
416
417 /* enable platform power */
418 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
419
420 /* USB on */
421 usbhs_sys_clock_ctrl(priv, enable);
422 } else {
423 /* USB off */
424 usbhs_sys_clock_ctrl(priv, enable);
425
426 /* disable platform power */
427 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
428
429 /* disable clks */
430 usbhsc_clk_disable_unprepare(priv);
431
432 /* disable PM */
433 pm_runtime_put_sync(dev);
434 }
435}
436
437/*
438 * hotplug
439 */
440static void usbhsc_hotplug(struct usbhs_priv *priv)
441{
442 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
443 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
444 int id;
445 int enable;
446 int cable;
447 int ret;
448
449 /*
450 * get vbus status from platform
451 */
452 enable = usbhs_mod_info_call(priv, get_vbus, pdev);
453
454 /*
455 * get id from platform
456 */
457 id = usbhs_platform_call(priv, get_id, pdev);
458
459 if (enable && !mod) {
460 if (priv->edev) {
461 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
462 if ((cable > 0 && id != USBHS_HOST) ||
463 (!cable && id != USBHS_GADGET)) {
464 dev_info(&pdev->dev,
465 "USB cable plugged in doesn't match the selected role!\n");
466 return;
467 }
468 }
469
470 ret = usbhs_mod_change(priv, id);
471 if (ret < 0)
472 return;
473
474 dev_dbg(&pdev->dev, "%s enable\n", __func__);
475
476 /* power on */
477 if (usbhs_get_dparam(priv, runtime_pwctrl))
478 usbhsc_power_ctrl(priv, enable);
479
480 /* bus init */
481 usbhsc_set_buswait(priv);
482 usbhsc_bus_init(priv);
483
484 /* module start */
485 usbhs_mod_call(priv, start, priv);
486
487 } else if (!enable && mod) {
488 dev_dbg(&pdev->dev, "%s disable\n", __func__);
489
490 /* module stop */
491 usbhs_mod_call(priv, stop, priv);
492
493 /* bus init */
494 usbhsc_bus_init(priv);
495
496 /* power off */
497 if (usbhs_get_dparam(priv, runtime_pwctrl))
498 usbhsc_power_ctrl(priv, enable);
499
500 usbhs_mod_change(priv, -1);
501
502 /* reset phy for next connection */
503 usbhs_platform_call(priv, phy_reset, pdev);
504 }
505}
506
507/*
508 * notify hotplug
509 */
510static void usbhsc_notify_hotplug(struct work_struct *work)
511{
512 struct usbhs_priv *priv = container_of(work,
513 struct usbhs_priv,
514 notify_hotplug_work.work);
515 usbhsc_hotplug(priv);
516}
517
518int usbhsc_schedule_notify_hotplug(struct platform_device *pdev)
519{
520 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
521 int delay = usbhs_get_dparam(priv, detection_delay);
522
523 /*
524 * This functions will be called in interrupt.
525 * To make sure safety context,
526 * use workqueue for usbhs_notify_hotplug
527 */
528 schedule_delayed_work(&priv->notify_hotplug_work,
529 msecs_to_jiffies(delay));
530 return 0;
531}
532
533/*
534 * platform functions
535 */
536static const struct of_device_id usbhs_of_match[] = {
537 {
538 .compatible = "renesas,usbhs-r8a774c0",
539 .data = &usbhs_rcar_gen3_with_pll_plat_info,
540 },
541 {
542 .compatible = "renesas,usbhs-r8a7790",
543 .data = &usbhs_rcar_gen2_plat_info,
544 },
545 {
546 .compatible = "renesas,usbhs-r8a7791",
547 .data = &usbhs_rcar_gen2_plat_info,
548 },
549 {
550 .compatible = "renesas,usbhs-r8a7794",
551 .data = &usbhs_rcar_gen2_plat_info,
552 },
553 {
554 .compatible = "renesas,usbhs-r8a7795",
555 .data = &usbhs_rcar_gen3_plat_info,
556 },
557 {
558 .compatible = "renesas,usbhs-r8a7796",
559 .data = &usbhs_rcar_gen3_plat_info,
560 },
561 {
562 .compatible = "renesas,usbhs-r8a77990",
563 .data = &usbhs_rcar_gen3_with_pll_plat_info,
564 },
565 {
566 .compatible = "renesas,usbhs-r8a77995",
567 .data = &usbhs_rcar_gen3_with_pll_plat_info,
568 },
569 {
570 .compatible = "renesas,rcar-gen2-usbhs",
571 .data = &usbhs_rcar_gen2_plat_info,
572 },
573 {
574 .compatible = "renesas,rcar-gen3-usbhs",
575 .data = &usbhs_rcar_gen3_plat_info,
576 },
577 {
578 .compatible = "renesas,rza1-usbhs",
579 .data = &usbhs_rza1_plat_info,
580 },
581 {
582 .compatible = "renesas,rza2-usbhs",
583 .data = &usbhs_rza2_plat_info,
584 },
585 { },
586};
587MODULE_DEVICE_TABLE(of, usbhs_of_match);
588
589static int usbhs_probe(struct platform_device *pdev)
590{
591 const struct renesas_usbhs_platform_info *info;
592 struct usbhs_priv *priv;
593 struct resource *res, *irq_res;
594 struct device *dev = &pdev->dev;
595 int ret, gpio;
596 u32 tmp;
597
598 /* check device node */
599 if (dev_of_node(dev))
600 info = of_device_get_match_data(dev);
601 else
602 info = renesas_usbhs_get_info(pdev);
603
604 /* check platform information */
605 if (!info) {
606 dev_err(dev, "no platform information\n");
607 return -EINVAL;
608 }
609
610 /* platform data */
611 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
612 if (!irq_res) {
613 dev_err(dev, "Not enough Renesas USB platform resources.\n");
614 return -ENODEV;
615 }
616
617 /* usb private data */
618 priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
619 if (!priv)
620 return -ENOMEM;
621
622 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
623 priv->base = devm_ioremap_resource(&pdev->dev, res);
624 if (IS_ERR(priv->base))
625 return PTR_ERR(priv->base);
626
627 if (of_property_read_bool(dev_of_node(dev), "extcon")) {
628 priv->edev = extcon_get_edev_by_phandle(dev, 0);
629 if (IS_ERR(priv->edev))
630 return PTR_ERR(priv->edev);
631 }
632
633 priv->rsts = devm_reset_control_array_get_optional_shared(dev);
634 if (IS_ERR(priv->rsts))
635 return PTR_ERR(priv->rsts);
636
637 /*
638 * care platform info
639 */
640
641 priv->dparam = info->driver_param;
642
643 if (!info->platform_callback.get_id) {
644 dev_err(dev, "no platform callbacks\n");
645 return -EINVAL;
646 }
647 priv->pfunc = &info->platform_callback;
648
649 /* set default param if platform doesn't have */
650 if (usbhs_get_dparam(priv, has_new_pipe_configs)) {
651 priv->dparam.pipe_configs = usbhsc_new_pipe;
652 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
653 } else if (!priv->dparam.pipe_configs) {
654 priv->dparam.pipe_configs = usbhsc_default_pipe;
655 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
656 }
657 if (!priv->dparam.pio_dma_border)
658 priv->dparam.pio_dma_border = 64; /* 64byte */
659 if (!of_property_read_u32(dev_of_node(dev), "renesas,buswait", &tmp))
660 priv->dparam.buswait_bwait = tmp;
661 gpio = of_get_named_gpio_flags(dev_of_node(dev), "renesas,enable-gpio",
662 0, NULL);
663 if (gpio > 0)
664 priv->dparam.enable_gpio = gpio;
665
666 /* FIXME */
667 /* runtime power control ? */
668 if (priv->pfunc->get_vbus)
669 usbhs_get_dparam(priv, runtime_pwctrl) = 1;
670
671 /*
672 * priv settings
673 */
674 priv->irq = irq_res->start;
675 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
676 priv->irqflags = IRQF_SHARED;
677 priv->pdev = pdev;
678 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
679 spin_lock_init(usbhs_priv_to_lock(priv));
680
681 /* call pipe and module init */
682 ret = usbhs_pipe_probe(priv);
683 if (ret < 0)
684 return ret;
685
686 ret = usbhs_fifo_probe(priv);
687 if (ret < 0)
688 goto probe_end_pipe_exit;
689
690 ret = usbhs_mod_probe(priv);
691 if (ret < 0)
692 goto probe_end_fifo_exit;
693
694 /* dev_set_drvdata should be called after usbhs_mod_init */
695 platform_set_drvdata(pdev, priv);
696
697 ret = reset_control_deassert(priv->rsts);
698 if (ret)
699 goto probe_fail_rst;
700
701 ret = usbhsc_clk_get(dev, priv);
702 if (ret)
703 goto probe_fail_clks;
704
705 /*
706 * deviece reset here because
707 * USB device might be used in boot loader.
708 */
709 usbhs_sys_clock_ctrl(priv, 0);
710
711 /* check GPIO determining if USB function should be enabled */
712 if (priv->dparam.enable_gpio) {
713 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
714 ret = !gpio_get_value(priv->dparam.enable_gpio);
715 gpio_free(priv->dparam.enable_gpio);
716 if (ret) {
717 dev_warn(dev, "USB function not selected (GPIO %d)\n",
718 priv->dparam.enable_gpio);
719 ret = -ENOTSUPP;
720 goto probe_end_mod_exit;
721 }
722 }
723
724 /*
725 * platform call
726 *
727 * USB phy setup might depend on CPU/Board.
728 * If platform has its callback functions,
729 * call it here.
730 */
731 ret = usbhs_platform_call(priv, hardware_init, pdev);
732 if (ret < 0) {
733 dev_err(dev, "platform init failed.\n");
734 goto probe_end_mod_exit;
735 }
736
737 /* reset phy for connection */
738 usbhs_platform_call(priv, phy_reset, pdev);
739
740 /* power control */
741 pm_runtime_enable(dev);
742 if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
743 usbhsc_power_ctrl(priv, 1);
744 usbhs_mod_autonomy_mode(priv);
745 } else {
746 usbhs_mod_non_autonomy_mode(priv);
747 }
748
749 /*
750 * manual call notify_hotplug for cold plug
751 */
752 usbhsc_schedule_notify_hotplug(pdev);
753
754 dev_info(dev, "probed\n");
755
756 return ret;
757
758probe_end_mod_exit:
759 usbhsc_clk_put(priv);
760probe_fail_clks:
761 reset_control_assert(priv->rsts);
762probe_fail_rst:
763 usbhs_mod_remove(priv);
764probe_end_fifo_exit:
765 usbhs_fifo_remove(priv);
766probe_end_pipe_exit:
767 usbhs_pipe_remove(priv);
768
769 dev_info(dev, "probe failed (%d)\n", ret);
770
771 return ret;
772}
773
774static int usbhs_remove(struct platform_device *pdev)
775{
776 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
777
778 dev_dbg(&pdev->dev, "usb remove\n");
779
780 /* power off */
781 if (!usbhs_get_dparam(priv, runtime_pwctrl))
782 usbhsc_power_ctrl(priv, 0);
783
784 pm_runtime_disable(&pdev->dev);
785
786 usbhs_platform_call(priv, hardware_exit, pdev);
787 usbhsc_clk_put(priv);
788 reset_control_assert(priv->rsts);
789 usbhs_mod_remove(priv);
790 usbhs_fifo_remove(priv);
791 usbhs_pipe_remove(priv);
792
793 return 0;
794}
795
796static __maybe_unused int usbhsc_suspend(struct device *dev)
797{
798 struct usbhs_priv *priv = dev_get_drvdata(dev);
799 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
800
801 if (mod) {
802 usbhs_mod_call(priv, stop, priv);
803 usbhs_mod_change(priv, -1);
804 }
805
806 if (mod || !usbhs_get_dparam(priv, runtime_pwctrl))
807 usbhsc_power_ctrl(priv, 0);
808
809 return 0;
810}
811
812static __maybe_unused int usbhsc_resume(struct device *dev)
813{
814 struct usbhs_priv *priv = dev_get_drvdata(dev);
815 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
816
817 if (!usbhs_get_dparam(priv, runtime_pwctrl)) {
818 usbhsc_power_ctrl(priv, 1);
819 usbhs_mod_autonomy_mode(priv);
820 }
821
822 usbhs_platform_call(priv, phy_reset, pdev);
823
824 usbhsc_schedule_notify_hotplug(pdev);
825
826 return 0;
827}
828
829static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume);
830
831static struct platform_driver renesas_usbhs_driver = {
832 .driver = {
833 .name = "renesas_usbhs",
834 .pm = &usbhsc_pm_ops,
835 .of_match_table = of_match_ptr(usbhs_of_match),
836 },
837 .probe = usbhs_probe,
838 .remove = usbhs_remove,
839};
840
841module_platform_driver(renesas_usbhs_driver);
842
843MODULE_LICENSE("GPL");
844MODULE_DESCRIPTION("Renesas USB driver");
845MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
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 */
76u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
77{
78 return ioread16(priv->base + reg);
79}
80
81void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
82{
83 iowrite16(data, priv->base + reg);
84}
85
86void 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
96struct 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 */
104static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
105{
106 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
107}
108
109void 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
127void 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
143void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
144{
145 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
146}
147
148void 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 */
156int 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 */
164void 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
177void 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 */
190void 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
202void usbhs_bus_send_reset(struct usbhs_priv *priv)
203{
204 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
205}
206
207int 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
223int 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
230static 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 */
240int 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 */
282void 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 */
292static 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 */
306static 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 */
320static 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 */
342static 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 */
371static 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 */
441static 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
449static 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 */
467static 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};
494MODULE_DEVICE_TABLE(of, usbhs_of_match);
495
496static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
497{
498 struct renesas_usbhs_platform_info *info;
499 struct renesas_usbhs_driver_param *dparam;
500 const struct of_device_id *of_id = of_match_device(usbhs_of_match, dev);
501 u32 tmp;
502 int gpio;
503
504 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
505 if (!info)
506 return NULL;
507
508 dparam = &info->driver_param;
509 dparam->type = of_id ? (uintptr_t)of_id->data : 0;
510 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
511 dparam->buswait_bwait = tmp;
512 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
513 NULL);
514 if (gpio > 0)
515 dparam->enable_gpio = gpio;
516
517 if (dparam->type == USBHS_TYPE_RCAR_GEN2)
518 dparam->has_usb_dmac = 1;
519
520 return info;
521}
522
523static int usbhs_probe(struct platform_device *pdev)
524{
525 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
526 struct renesas_usbhs_driver_callback *dfunc;
527 struct usbhs_priv *priv;
528 struct resource *res, *irq_res;
529 int ret;
530
531 /* check device node */
532 if (pdev->dev.of_node)
533 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
534
535 /* check platform information */
536 if (!info) {
537 dev_err(&pdev->dev, "no platform information\n");
538 return -EINVAL;
539 }
540
541 /* platform data */
542 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
543 if (!irq_res) {
544 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
545 return -ENODEV;
546 }
547
548 /* usb private data */
549 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
550 if (!priv)
551 return -ENOMEM;
552
553 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
554 priv->base = devm_ioremap_resource(&pdev->dev, res);
555 if (IS_ERR(priv->base))
556 return PTR_ERR(priv->base);
557
558 if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
559 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
560 if (IS_ERR(priv->edev))
561 return PTR_ERR(priv->edev);
562 }
563
564 /*
565 * care platform info
566 */
567
568 memcpy(&priv->dparam,
569 &info->driver_param,
570 sizeof(struct renesas_usbhs_driver_param));
571
572 switch (priv->dparam.type) {
573 case USBHS_TYPE_RCAR_GEN2:
574 priv->pfunc = usbhs_rcar2_ops;
575 if (!priv->dparam.pipe_configs) {
576 priv->dparam.pipe_configs = usbhsc_new_pipe;
577 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
578 }
579 break;
580 case USBHS_TYPE_RCAR_GEN3:
581 priv->pfunc = usbhs_rcar3_ops;
582 if (!priv->dparam.pipe_configs) {
583 priv->dparam.pipe_configs = usbhsc_new_pipe;
584 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
585 }
586 break;
587 default:
588 if (!info->platform_callback.get_id) {
589 dev_err(&pdev->dev, "no platform callbacks");
590 return -EINVAL;
591 }
592 memcpy(&priv->pfunc,
593 &info->platform_callback,
594 sizeof(struct renesas_usbhs_platform_callback));
595 break;
596 }
597
598 /* set driver callback functions for platform */
599 dfunc = &info->driver_callback;
600 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
601
602 /* set default param if platform doesn't have */
603 if (!priv->dparam.pipe_configs) {
604 priv->dparam.pipe_configs = usbhsc_default_pipe;
605 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
606 }
607 if (!priv->dparam.pio_dma_border)
608 priv->dparam.pio_dma_border = 64; /* 64byte */
609
610 /* FIXME */
611 /* runtime power control ? */
612 if (priv->pfunc.get_vbus)
613 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
614
615 /*
616 * priv settings
617 */
618 priv->irq = irq_res->start;
619 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
620 priv->irqflags = IRQF_SHARED;
621 priv->pdev = pdev;
622 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
623 spin_lock_init(usbhs_priv_to_lock(priv));
624
625 /* call pipe and module init */
626 ret = usbhs_pipe_probe(priv);
627 if (ret < 0)
628 return ret;
629
630 ret = usbhs_fifo_probe(priv);
631 if (ret < 0)
632 goto probe_end_pipe_exit;
633
634 ret = usbhs_mod_probe(priv);
635 if (ret < 0)
636 goto probe_end_fifo_exit;
637
638 /* dev_set_drvdata should be called after usbhs_mod_init */
639 platform_set_drvdata(pdev, priv);
640
641 /*
642 * deviece reset here because
643 * USB device might be used in boot loader.
644 */
645 usbhs_sys_clock_ctrl(priv, 0);
646
647 /* check GPIO determining if USB function should be enabled */
648 if (priv->dparam.enable_gpio) {
649 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
650 ret = !gpio_get_value(priv->dparam.enable_gpio);
651 gpio_free(priv->dparam.enable_gpio);
652 if (ret) {
653 dev_warn(&pdev->dev,
654 "USB function not selected (GPIO %d)\n",
655 priv->dparam.enable_gpio);
656 ret = -ENOTSUPP;
657 goto probe_end_mod_exit;
658 }
659 }
660
661 /*
662 * platform call
663 *
664 * USB phy setup might depend on CPU/Board.
665 * If platform has its callback functions,
666 * call it here.
667 */
668 ret = usbhs_platform_call(priv, hardware_init, pdev);
669 if (ret < 0) {
670 dev_err(&pdev->dev, "platform init failed.\n");
671 goto probe_end_mod_exit;
672 }
673
674 /* reset phy for connection */
675 usbhs_platform_call(priv, phy_reset, pdev);
676
677 /* power control */
678 pm_runtime_enable(&pdev->dev);
679 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
680 usbhsc_power_ctrl(priv, 1);
681 usbhs_mod_autonomy_mode(priv);
682 }
683
684 /*
685 * manual call notify_hotplug for cold plug
686 */
687 usbhsc_drvcllbck_notify_hotplug(pdev);
688
689 dev_info(&pdev->dev, "probed\n");
690
691 return ret;
692
693probe_end_mod_exit:
694 usbhs_mod_remove(priv);
695probe_end_fifo_exit:
696 usbhs_fifo_remove(priv);
697probe_end_pipe_exit:
698 usbhs_pipe_remove(priv);
699
700 dev_info(&pdev->dev, "probe failed\n");
701
702 return ret;
703}
704
705static int usbhs_remove(struct platform_device *pdev)
706{
707 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
708 struct renesas_usbhs_platform_info *info = dev_get_platdata(&pdev->dev);
709 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
710
711 dev_dbg(&pdev->dev, "usb remove\n");
712
713 dfunc->notify_hotplug = NULL;
714
715 /* power off */
716 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
717 usbhsc_power_ctrl(priv, 0);
718
719 pm_runtime_disable(&pdev->dev);
720
721 usbhs_platform_call(priv, hardware_exit, pdev);
722 usbhs_mod_remove(priv);
723 usbhs_fifo_remove(priv);
724 usbhs_pipe_remove(priv);
725
726 return 0;
727}
728
729static int usbhsc_suspend(struct device *dev)
730{
731 struct usbhs_priv *priv = dev_get_drvdata(dev);
732 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
733
734 if (mod) {
735 usbhs_mod_call(priv, stop, priv);
736 usbhs_mod_change(priv, -1);
737 }
738
739 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
740 usbhsc_power_ctrl(priv, 0);
741
742 return 0;
743}
744
745static int usbhsc_resume(struct device *dev)
746{
747 struct usbhs_priv *priv = dev_get_drvdata(dev);
748 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
749
750 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
751 usbhsc_power_ctrl(priv, 1);
752
753 usbhs_platform_call(priv, phy_reset, pdev);
754
755 usbhsc_drvcllbck_notify_hotplug(pdev);
756
757 return 0;
758}
759
760static int usbhsc_runtime_nop(struct device *dev)
761{
762 /* Runtime PM callback shared between ->runtime_suspend()
763 * and ->runtime_resume(). Simply returns success.
764 *
765 * This driver re-initializes all registers after
766 * pm_runtime_get_sync() anyway so there is no need
767 * to save and restore registers here.
768 */
769 return 0;
770}
771
772static const struct dev_pm_ops usbhsc_pm_ops = {
773 .suspend = usbhsc_suspend,
774 .resume = usbhsc_resume,
775 .runtime_suspend = usbhsc_runtime_nop,
776 .runtime_resume = usbhsc_runtime_nop,
777};
778
779static struct platform_driver renesas_usbhs_driver = {
780 .driver = {
781 .name = "renesas_usbhs",
782 .pm = &usbhsc_pm_ops,
783 .of_match_table = of_match_ptr(usbhs_of_match),
784 },
785 .probe = usbhs_probe,
786 .remove = usbhs_remove,
787};
788
789module_platform_driver(renesas_usbhs_driver);
790
791MODULE_LICENSE("GPL");
792MODULE_DESCRIPTION("Renesas USB driver");
793MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");