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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// SPDX-License-Identifier: GPL-1.0+
2/*
3 * Renesas USB driver
4 *
5 * Copyright (C) 2011 Renesas Solutions Corp.
6 * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
7 */
8#include <linux/err.h>
9#include <linux/gpio.h>
10#include <linux/io.h>
11#include <linux/module.h>
12#include <linux/of_device.h>
13#include <linux/of_gpio.h>
14#include <linux/pm_runtime.h>
15#include <linux/slab.h>
16#include <linux/sysfs.h>
17#include "common.h"
18#include "rcar2.h"
19#include "rcar3.h"
20#include "rza.h"
21
22/*
23 * image of renesas_usbhs
24 *
25 * ex) gadget case
26
27 * mod.c
28 * mod_gadget.c
29 * mod_host.c pipe.c fifo.c
30 *
31 * +-------+ +-----------+
32 * | pipe0 |------>| fifo pio |
33 * +------------+ +-------+ +-----------+
34 * | mod_gadget |=====> | pipe1 |--+
35 * +------------+ +-------+ | +-----------+
36 * | pipe2 | | +-| fifo dma0 |
37 * +------------+ +-------+ | | +-----------+
38 * | mod_host | | pipe3 |<-|--+
39 * +------------+ +-------+ | +-----------+
40 * | .... | +--->| fifo dma1 |
41 * | .... | +-----------+
42 */
43
44
45#define USBHSF_RUNTIME_PWCTRL (1 << 0)
46
47/* status */
48#define usbhsc_flags_init(p) do {(p)->flags = 0; } while (0)
49#define usbhsc_flags_set(p, b) ((p)->flags |= (b))
50#define usbhsc_flags_clr(p, b) ((p)->flags &= ~(b))
51#define usbhsc_flags_has(p, b) ((p)->flags & (b))
52
53/*
54 * platform call back
55 *
56 * renesas usb support platform callback function.
57 * Below macro call it.
58 * if platform doesn't have callback, it return 0 (no error)
59 */
60#define usbhs_platform_call(priv, func, args...)\
61 (!(priv) ? -ENODEV : \
62 !((priv)->pfunc.func) ? 0 : \
63 (priv)->pfunc.func(args))
64
65/*
66 * common functions
67 */
68u16 usbhs_read(struct usbhs_priv *priv, u32 reg)
69{
70 return ioread16(priv->base + reg);
71}
72
73void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data)
74{
75 iowrite16(data, priv->base + reg);
76}
77
78void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data)
79{
80 u16 val = usbhs_read(priv, reg);
81
82 val &= ~mask;
83 val |= data & mask;
84
85 usbhs_write(priv, reg, val);
86}
87
88struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev)
89{
90 return dev_get_drvdata(&pdev->dev);
91}
92
93/*
94 * syscfg functions
95 */
96static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable)
97{
98 usbhs_bset(priv, SYSCFG, SCKE, enable ? SCKE : 0);
99}
100
101void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable)
102{
103 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
104 u16 val = DCFM | DRPD | HSE | USBE;
105 int has_otg = usbhs_get_dparam(priv, has_otg);
106
107 if (has_otg)
108 usbhs_bset(priv, DVSTCTR, (EXTLP | PWEN), (EXTLP | PWEN));
109
110 /*
111 * if enable
112 *
113 * - select Host mode
114 * - D+ Line/D- Line Pull-down
115 */
116 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
117}
118
119void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable)
120{
121 u16 mask = DCFM | DRPD | DPRPU | HSE | USBE;
122 u16 val = HSE | USBE;
123
124 /*
125 * if enable
126 *
127 * - select Function mode
128 * - D+ Line Pull-up is disabled
129 * When D+ Line Pull-up is enabled,
130 * calling usbhs_sys_function_pullup(,1)
131 */
132 usbhs_bset(priv, SYSCFG, mask, enable ? val : 0);
133}
134
135void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable)
136{
137 usbhs_bset(priv, SYSCFG, DPRPU, enable ? DPRPU : 0);
138}
139
140void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode)
141{
142 usbhs_write(priv, TESTMODE, mode);
143}
144
145/*
146 * frame functions
147 */
148int usbhs_frame_get_num(struct usbhs_priv *priv)
149{
150 return usbhs_read(priv, FRMNUM) & FRNM_MASK;
151}
152
153/*
154 * usb request functions
155 */
156void usbhs_usbreq_get_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
157{
158 u16 val;
159
160 val = usbhs_read(priv, USBREQ);
161 req->bRequest = (val >> 8) & 0xFF;
162 req->bRequestType = (val >> 0) & 0xFF;
163
164 req->wValue = usbhs_read(priv, USBVAL);
165 req->wIndex = usbhs_read(priv, USBINDX);
166 req->wLength = usbhs_read(priv, USBLENG);
167}
168
169void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req)
170{
171 usbhs_write(priv, USBREQ, (req->bRequest << 8) | req->bRequestType);
172 usbhs_write(priv, USBVAL, req->wValue);
173 usbhs_write(priv, USBINDX, req->wIndex);
174 usbhs_write(priv, USBLENG, req->wLength);
175
176 usbhs_bset(priv, DCPCTR, SUREQ, SUREQ);
177}
178
179/*
180 * bus/vbus functions
181 */
182void usbhs_bus_send_sof_enable(struct usbhs_priv *priv)
183{
184 u16 status = usbhs_read(priv, DVSTCTR) & (USBRST | UACT);
185
186 if (status != USBRST) {
187 struct device *dev = usbhs_priv_to_dev(priv);
188 dev_err(dev, "usbhs should be reset\n");
189 }
190
191 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), UACT);
192}
193
194void usbhs_bus_send_reset(struct usbhs_priv *priv)
195{
196 usbhs_bset(priv, DVSTCTR, (USBRST | UACT), USBRST);
197}
198
199int usbhs_bus_get_speed(struct usbhs_priv *priv)
200{
201 u16 dvstctr = usbhs_read(priv, DVSTCTR);
202
203 switch (RHST & dvstctr) {
204 case RHST_LOW_SPEED:
205 return USB_SPEED_LOW;
206 case RHST_FULL_SPEED:
207 return USB_SPEED_FULL;
208 case RHST_HIGH_SPEED:
209 return USB_SPEED_HIGH;
210 }
211
212 return USB_SPEED_UNKNOWN;
213}
214
215int usbhs_vbus_ctrl(struct usbhs_priv *priv, int enable)
216{
217 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
218
219 return usbhs_platform_call(priv, set_vbus, pdev, enable);
220}
221
222static void usbhsc_bus_init(struct usbhs_priv *priv)
223{
224 usbhs_write(priv, DVSTCTR, 0);
225
226 usbhs_vbus_ctrl(priv, 0);
227}
228
229/*
230 * device configuration
231 */
232int usbhs_set_device_config(struct usbhs_priv *priv, int devnum,
233 u16 upphub, u16 hubport, u16 speed)
234{
235 struct device *dev = usbhs_priv_to_dev(priv);
236 u16 usbspd = 0;
237 u32 reg = DEVADD0 + (2 * devnum);
238
239 if (devnum > 10) {
240 dev_err(dev, "cannot set speed to unknown device %d\n", devnum);
241 return -EIO;
242 }
243
244 if (upphub > 0xA) {
245 dev_err(dev, "unsupported hub number %d\n", upphub);
246 return -EIO;
247 }
248
249 switch (speed) {
250 case USB_SPEED_LOW:
251 usbspd = USBSPD_SPEED_LOW;
252 break;
253 case USB_SPEED_FULL:
254 usbspd = USBSPD_SPEED_FULL;
255 break;
256 case USB_SPEED_HIGH:
257 usbspd = USBSPD_SPEED_HIGH;
258 break;
259 default:
260 dev_err(dev, "unsupported speed %d\n", speed);
261 return -EIO;
262 }
263
264 usbhs_write(priv, reg, UPPHUB(upphub) |
265 HUBPORT(hubport)|
266 USBSPD(usbspd));
267
268 return 0;
269}
270
271/*
272 * interrupt functions
273 */
274void usbhs_xxxsts_clear(struct usbhs_priv *priv, u16 sts_reg, u16 bit)
275{
276 u16 pipe_mask = (u16)GENMASK(usbhs_get_dparam(priv, pipe_size), 0);
277
278 usbhs_write(priv, sts_reg, ~(1 << bit) & pipe_mask);
279}
280
281/*
282 * local functions
283 */
284static void usbhsc_set_buswait(struct usbhs_priv *priv)
285{
286 int wait = usbhs_get_dparam(priv, buswait_bwait);
287
288 /* set bus wait if platform have */
289 if (wait)
290 usbhs_bset(priv, BUSWAIT, 0x000F, wait);
291}
292
293/*
294 * platform default param
295 */
296
297/* commonly used on old SH-Mobile SoCs */
298static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = {
299 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
300 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false),
301 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false),
302 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true),
303 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true),
304 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
305 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
306 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
307 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
308 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false),
309};
310
311/* commonly used on newer SH-Mobile and R-Car SoCs */
312static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = {
313 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false),
314 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true),
315 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true),
316 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true),
317 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true),
318 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true),
319 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false),
320 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false),
321 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false),
322 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true),
323 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true),
324 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true),
325 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true),
326 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true),
327 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true),
328 RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true),
329};
330
331/*
332 * power control
333 */
334static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable)
335{
336 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
337 struct device *dev = usbhs_priv_to_dev(priv);
338
339 if (enable) {
340 /* enable PM */
341 pm_runtime_get_sync(dev);
342
343 /* enable platform power */
344 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
345
346 /* USB on */
347 usbhs_sys_clock_ctrl(priv, enable);
348 } else {
349 /* USB off */
350 usbhs_sys_clock_ctrl(priv, enable);
351
352 /* disable platform power */
353 usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable);
354
355 /* disable PM */
356 pm_runtime_put_sync(dev);
357 }
358}
359
360/*
361 * hotplug
362 */
363static void usbhsc_hotplug(struct usbhs_priv *priv)
364{
365 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
366 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
367 int id;
368 int enable;
369 int cable;
370 int ret;
371
372 /*
373 * get vbus status from platform
374 */
375 enable = usbhs_platform_call(priv, get_vbus, pdev);
376
377 /*
378 * get id from platform
379 */
380 id = usbhs_platform_call(priv, get_id, pdev);
381
382 if (enable && !mod) {
383 if (priv->edev) {
384 cable = extcon_get_state(priv->edev, EXTCON_USB_HOST);
385 if ((cable > 0 && id != USBHS_HOST) ||
386 (!cable && id != USBHS_GADGET)) {
387 dev_info(&pdev->dev,
388 "USB cable plugged in doesn't match the selected role!\n");
389 return;
390 }
391 }
392
393 ret = usbhs_mod_change(priv, id);
394 if (ret < 0)
395 return;
396
397 dev_dbg(&pdev->dev, "%s enable\n", __func__);
398
399 /* power on */
400 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
401 usbhsc_power_ctrl(priv, enable);
402
403 /* bus init */
404 usbhsc_set_buswait(priv);
405 usbhsc_bus_init(priv);
406
407 /* module start */
408 usbhs_mod_call(priv, start, priv);
409
410 } else if (!enable && mod) {
411 dev_dbg(&pdev->dev, "%s disable\n", __func__);
412
413 /* module stop */
414 usbhs_mod_call(priv, stop, priv);
415
416 /* bus init */
417 usbhsc_bus_init(priv);
418
419 /* power off */
420 if (usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
421 usbhsc_power_ctrl(priv, enable);
422
423 usbhs_mod_change(priv, -1);
424
425 /* reset phy for next connection */
426 usbhs_platform_call(priv, phy_reset, pdev);
427 }
428}
429
430/*
431 * notify hotplug
432 */
433static void usbhsc_notify_hotplug(struct work_struct *work)
434{
435 struct usbhs_priv *priv = container_of(work,
436 struct usbhs_priv,
437 notify_hotplug_work.work);
438 usbhsc_hotplug(priv);
439}
440
441static int usbhsc_drvcllbck_notify_hotplug(struct platform_device *pdev)
442{
443 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
444 int delay = usbhs_get_dparam(priv, detection_delay);
445
446 /*
447 * This functions will be called in interrupt.
448 * To make sure safety context,
449 * use workqueue for usbhs_notify_hotplug
450 */
451 schedule_delayed_work(&priv->notify_hotplug_work,
452 msecs_to_jiffies(delay));
453 return 0;
454}
455
456/*
457 * platform functions
458 */
459static const struct of_device_id usbhs_of_match[] = {
460 {
461 .compatible = "renesas,usbhs-r8a7790",
462 .data = (void *)USBHS_TYPE_RCAR_GEN2,
463 },
464 {
465 .compatible = "renesas,usbhs-r8a7791",
466 .data = (void *)USBHS_TYPE_RCAR_GEN2,
467 },
468 {
469 .compatible = "renesas,usbhs-r8a7794",
470 .data = (void *)USBHS_TYPE_RCAR_GEN2,
471 },
472 {
473 .compatible = "renesas,usbhs-r8a7795",
474 .data = (void *)USBHS_TYPE_RCAR_GEN3,
475 },
476 {
477 .compatible = "renesas,usbhs-r8a7796",
478 .data = (void *)USBHS_TYPE_RCAR_GEN3,
479 },
480 {
481 .compatible = "renesas,usbhs-r8a77995",
482 .data = (void *)USBHS_TYPE_RCAR_GEN3_WITH_PLL,
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 .compatible = "renesas,rza1-usbhs",
494 .data = (void *)USBHS_TYPE_RZA1,
495 },
496 { },
497};
498MODULE_DEVICE_TABLE(of, usbhs_of_match);
499
500static struct renesas_usbhs_platform_info *usbhs_parse_dt(struct device *dev)
501{
502 struct renesas_usbhs_platform_info *info;
503 struct renesas_usbhs_driver_param *dparam;
504 u32 tmp;
505 int gpio;
506
507 info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
508 if (!info)
509 return NULL;
510
511 dparam = &info->driver_param;
512 dparam->type = (uintptr_t)of_device_get_match_data(dev);
513 if (!of_property_read_u32(dev->of_node, "renesas,buswait", &tmp))
514 dparam->buswait_bwait = tmp;
515 gpio = of_get_named_gpio_flags(dev->of_node, "renesas,enable-gpio", 0,
516 NULL);
517 if (gpio > 0)
518 dparam->enable_gpio = gpio;
519
520 if (dparam->type == USBHS_TYPE_RCAR_GEN2 ||
521 dparam->type == USBHS_TYPE_RCAR_GEN3 ||
522 dparam->type == USBHS_TYPE_RCAR_GEN3_WITH_PLL) {
523 dparam->has_usb_dmac = 1;
524 dparam->pipe_configs = usbhsc_new_pipe;
525 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
526 }
527
528 if (dparam->type == USBHS_TYPE_RZA1) {
529 dparam->pipe_configs = usbhsc_new_pipe;
530 dparam->pipe_size = ARRAY_SIZE(usbhsc_new_pipe);
531 }
532
533 return info;
534}
535
536static int usbhs_probe(struct platform_device *pdev)
537{
538 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev);
539 struct renesas_usbhs_driver_callback *dfunc;
540 struct usbhs_priv *priv;
541 struct resource *res, *irq_res;
542 int ret;
543
544 /* check device node */
545 if (pdev->dev.of_node)
546 info = pdev->dev.platform_data = usbhs_parse_dt(&pdev->dev);
547
548 /* check platform information */
549 if (!info) {
550 dev_err(&pdev->dev, "no platform information\n");
551 return -EINVAL;
552 }
553
554 /* platform data */
555 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
556 if (!irq_res) {
557 dev_err(&pdev->dev, "Not enough Renesas USB platform resources.\n");
558 return -ENODEV;
559 }
560
561 /* usb private data */
562 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
563 if (!priv)
564 return -ENOMEM;
565
566 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
567 priv->base = devm_ioremap_resource(&pdev->dev, res);
568 if (IS_ERR(priv->base))
569 return PTR_ERR(priv->base);
570
571 if (of_property_read_bool(pdev->dev.of_node, "extcon")) {
572 priv->edev = extcon_get_edev_by_phandle(&pdev->dev, 0);
573 if (IS_ERR(priv->edev))
574 return PTR_ERR(priv->edev);
575 }
576
577 /*
578 * care platform info
579 */
580
581 memcpy(&priv->dparam,
582 &info->driver_param,
583 sizeof(struct renesas_usbhs_driver_param));
584
585 switch (priv->dparam.type) {
586 case USBHS_TYPE_RCAR_GEN2:
587 priv->pfunc = usbhs_rcar2_ops;
588 break;
589 case USBHS_TYPE_RCAR_GEN3:
590 priv->pfunc = usbhs_rcar3_ops;
591 break;
592 case USBHS_TYPE_RCAR_GEN3_WITH_PLL:
593 priv->pfunc = usbhs_rcar3_with_pll_ops;
594 if (!IS_ERR_OR_NULL(priv->edev)) {
595 priv->nb.notifier_call = priv->pfunc.notifier;
596 ret = devm_extcon_register_notifier(&pdev->dev,
597 priv->edev,
598 EXTCON_USB_HOST,
599 &priv->nb);
600 if (ret < 0)
601 dev_err(&pdev->dev, "no notifier registered\n");
602 }
603 break;
604 case USBHS_TYPE_RZA1:
605 priv->pfunc = usbhs_rza1_ops;
606 break;
607 default:
608 if (!info->platform_callback.get_id) {
609 dev_err(&pdev->dev, "no platform callbacks");
610 return -EINVAL;
611 }
612 memcpy(&priv->pfunc,
613 &info->platform_callback,
614 sizeof(struct renesas_usbhs_platform_callback));
615 break;
616 }
617
618 /* set driver callback functions for platform */
619 dfunc = &info->driver_callback;
620 dfunc->notify_hotplug = usbhsc_drvcllbck_notify_hotplug;
621
622 /* set default param if platform doesn't have */
623 if (!priv->dparam.pipe_configs) {
624 priv->dparam.pipe_configs = usbhsc_default_pipe;
625 priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe);
626 }
627 if (!priv->dparam.pio_dma_border)
628 priv->dparam.pio_dma_border = 64; /* 64byte */
629
630 /* FIXME */
631 /* runtime power control ? */
632 if (priv->pfunc.get_vbus)
633 usbhsc_flags_set(priv, USBHSF_RUNTIME_PWCTRL);
634
635 /*
636 * priv settings
637 */
638 priv->irq = irq_res->start;
639 if (irq_res->flags & IORESOURCE_IRQ_SHAREABLE)
640 priv->irqflags = IRQF_SHARED;
641 priv->pdev = pdev;
642 INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug);
643 spin_lock_init(usbhs_priv_to_lock(priv));
644
645 /* call pipe and module init */
646 ret = usbhs_pipe_probe(priv);
647 if (ret < 0)
648 return ret;
649
650 ret = usbhs_fifo_probe(priv);
651 if (ret < 0)
652 goto probe_end_pipe_exit;
653
654 ret = usbhs_mod_probe(priv);
655 if (ret < 0)
656 goto probe_end_fifo_exit;
657
658 /* dev_set_drvdata should be called after usbhs_mod_init */
659 platform_set_drvdata(pdev, priv);
660
661 /*
662 * deviece reset here because
663 * USB device might be used in boot loader.
664 */
665 usbhs_sys_clock_ctrl(priv, 0);
666
667 /* check GPIO determining if USB function should be enabled */
668 if (priv->dparam.enable_gpio) {
669 gpio_request_one(priv->dparam.enable_gpio, GPIOF_IN, NULL);
670 ret = !gpio_get_value(priv->dparam.enable_gpio);
671 gpio_free(priv->dparam.enable_gpio);
672 if (ret) {
673 dev_warn(&pdev->dev,
674 "USB function not selected (GPIO %d)\n",
675 priv->dparam.enable_gpio);
676 ret = -ENOTSUPP;
677 goto probe_end_mod_exit;
678 }
679 }
680
681 /*
682 * platform call
683 *
684 * USB phy setup might depend on CPU/Board.
685 * If platform has its callback functions,
686 * call it here.
687 */
688 ret = usbhs_platform_call(priv, hardware_init, pdev);
689 if (ret < 0) {
690 dev_err(&pdev->dev, "platform init failed.\n");
691 goto probe_end_mod_exit;
692 }
693
694 /* reset phy for connection */
695 usbhs_platform_call(priv, phy_reset, pdev);
696
697 /* power control */
698 pm_runtime_enable(&pdev->dev);
699 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
700 usbhsc_power_ctrl(priv, 1);
701 usbhs_mod_autonomy_mode(priv);
702 }
703
704 /*
705 * manual call notify_hotplug for cold plug
706 */
707 usbhsc_drvcllbck_notify_hotplug(pdev);
708
709 dev_info(&pdev->dev, "probed\n");
710
711 return ret;
712
713probe_end_mod_exit:
714 usbhs_mod_remove(priv);
715probe_end_fifo_exit:
716 usbhs_fifo_remove(priv);
717probe_end_pipe_exit:
718 usbhs_pipe_remove(priv);
719
720 dev_info(&pdev->dev, "probe failed (%d)\n", ret);
721
722 return ret;
723}
724
725static int usbhs_remove(struct platform_device *pdev)
726{
727 struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev);
728 struct renesas_usbhs_platform_info *info = renesas_usbhs_get_info(pdev);
729 struct renesas_usbhs_driver_callback *dfunc = &info->driver_callback;
730
731 dev_dbg(&pdev->dev, "usb remove\n");
732
733 dfunc->notify_hotplug = NULL;
734
735 /* power off */
736 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
737 usbhsc_power_ctrl(priv, 0);
738
739 pm_runtime_disable(&pdev->dev);
740
741 usbhs_platform_call(priv, hardware_exit, pdev);
742 usbhs_mod_remove(priv);
743 usbhs_fifo_remove(priv);
744 usbhs_pipe_remove(priv);
745
746 return 0;
747}
748
749static int usbhsc_suspend(struct device *dev)
750{
751 struct usbhs_priv *priv = dev_get_drvdata(dev);
752 struct usbhs_mod *mod = usbhs_mod_get_current(priv);
753
754 if (mod) {
755 usbhs_mod_call(priv, stop, priv);
756 usbhs_mod_change(priv, -1);
757 }
758
759 if (mod || !usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL))
760 usbhsc_power_ctrl(priv, 0);
761
762 return 0;
763}
764
765static int usbhsc_resume(struct device *dev)
766{
767 struct usbhs_priv *priv = dev_get_drvdata(dev);
768 struct platform_device *pdev = usbhs_priv_to_pdev(priv);
769
770 if (!usbhsc_flags_has(priv, USBHSF_RUNTIME_PWCTRL)) {
771 usbhsc_power_ctrl(priv, 1);
772 usbhs_mod_autonomy_mode(priv);
773 }
774
775 usbhs_platform_call(priv, phy_reset, pdev);
776
777 usbhsc_drvcllbck_notify_hotplug(pdev);
778
779 return 0;
780}
781
782static int usbhsc_runtime_nop(struct device *dev)
783{
784 /* Runtime PM callback shared between ->runtime_suspend()
785 * and ->runtime_resume(). Simply returns success.
786 *
787 * This driver re-initializes all registers after
788 * pm_runtime_get_sync() anyway so there is no need
789 * to save and restore registers here.
790 */
791 return 0;
792}
793
794static const struct dev_pm_ops usbhsc_pm_ops = {
795 .suspend = usbhsc_suspend,
796 .resume = usbhsc_resume,
797 .runtime_suspend = usbhsc_runtime_nop,
798 .runtime_resume = usbhsc_runtime_nop,
799};
800
801static struct platform_driver renesas_usbhs_driver = {
802 .driver = {
803 .name = "renesas_usbhs",
804 .pm = &usbhsc_pm_ops,
805 .of_match_table = of_match_ptr(usbhs_of_match),
806 },
807 .probe = usbhs_probe,
808 .remove = usbhs_remove,
809};
810
811module_platform_driver(renesas_usbhs_driver);
812
813MODULE_LICENSE("GPL");
814MODULE_DESCRIPTION("Renesas USB driver");
815MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");