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/consumer.h> |
12 | #include <linux/io.h> |
13 | #include <linux/module.h> |
14 | #include <linux/of.h> |
15 | #include <linux/pm_runtime.h> |
16 | #include <linux/reset.h> |
17 | #include <linux/slab.h> |
18 | #include <linux/sysfs.h> |
19 | #include "common.h" |
20 | #include "rcar2.h" |
21 | #include "rcar3.h" |
22 | #include "rza.h" |
23 | |
24 | /* |
25 | * image of renesas_usbhs |
26 | * |
27 | * ex) gadget case |
28 | |
29 | * mod.c |
30 | * mod_gadget.c |
31 | * mod_host.c pipe.c fifo.c |
32 | * |
33 | * +-------+ +-----------+ |
34 | * | pipe0 |------>| fifo pio | |
35 | * +------------+ +-------+ +-----------+ |
36 | * | mod_gadget |=====> | pipe1 |--+ |
37 | * +------------+ +-------+ | +-----------+ |
38 | * | pipe2 | | +-| fifo dma0 | |
39 | * +------------+ +-------+ | | +-----------+ |
40 | * | mod_host | | pipe3 |<-|--+ |
41 | * +------------+ +-------+ | +-----------+ |
42 | * | .... | +--->| fifo dma1 | |
43 | * | .... | +-----------+ |
44 | */ |
45 | |
46 | /* |
47 | * platform call back |
48 | * |
49 | * renesas usb support platform callback function. |
50 | * Below macro call it. |
51 | * if platform doesn't have callback, it return 0 (no error) |
52 | */ |
53 | #define usbhs_platform_call(priv, func, args...)\ |
54 | (!(priv) ? -ENODEV : \ |
55 | !((priv)->pfunc->func) ? 0 : \ |
56 | (priv)->pfunc->func(args)) |
57 | |
58 | /* |
59 | * common functions |
60 | */ |
61 | u16 usbhs_read(struct usbhs_priv *priv, u32 reg) |
62 | { |
63 | return ioread16(priv->base + reg); |
64 | } |
65 | |
66 | void usbhs_write(struct usbhs_priv *priv, u32 reg, u16 data) |
67 | { |
68 | iowrite16(data, priv->base + reg); |
69 | } |
70 | |
71 | void usbhs_bset(struct usbhs_priv *priv, u32 reg, u16 mask, u16 data) |
72 | { |
73 | u16 val = usbhs_read(priv, reg); |
74 | |
75 | val &= ~mask; |
76 | val |= data & mask; |
77 | |
78 | usbhs_write(priv, reg, data: val); |
79 | } |
80 | |
81 | struct usbhs_priv *usbhs_pdev_to_priv(struct platform_device *pdev) |
82 | { |
83 | return dev_get_drvdata(dev: &pdev->dev); |
84 | } |
85 | |
86 | int usbhs_get_id_as_gadget(struct platform_device *pdev) |
87 | { |
88 | return USBHS_GADGET; |
89 | } |
90 | |
91 | /* |
92 | * syscfg functions |
93 | */ |
94 | static void usbhs_sys_clock_ctrl(struct usbhs_priv *priv, int enable) |
95 | { |
96 | usbhs_bset(priv, SYSCFG, SCKE, data: enable ? SCKE : 0); |
97 | } |
98 | |
99 | void usbhs_sys_host_ctrl(struct usbhs_priv *priv, int enable) |
100 | { |
101 | u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; |
102 | u16 val = DCFM | DRPD | HSE | USBE; |
103 | |
104 | /* |
105 | * if enable |
106 | * |
107 | * - select Host mode |
108 | * - D+ Line/D- Line Pull-down |
109 | */ |
110 | usbhs_bset(priv, SYSCFG, mask, data: enable ? val : 0); |
111 | } |
112 | |
113 | void usbhs_sys_function_ctrl(struct usbhs_priv *priv, int enable) |
114 | { |
115 | u16 mask = DCFM | DRPD | DPRPU | HSE | USBE; |
116 | u16 val = HSE | USBE; |
117 | |
118 | /* CNEN bit is required for function operation */ |
119 | if (usbhs_get_dparam(priv, has_cnen)) { |
120 | mask |= CNEN; |
121 | val |= CNEN; |
122 | } |
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, data: enable ? val : 0); |
133 | } |
134 | |
135 | void usbhs_sys_function_pullup(struct usbhs_priv *priv, int enable) |
136 | { |
137 | usbhs_bset(priv, SYSCFG, DPRPU, data: enable ? DPRPU : 0); |
138 | } |
139 | |
140 | void usbhs_sys_set_test_mode(struct usbhs_priv *priv, u16 mode) |
141 | { |
142 | usbhs_write(priv, TESTMODE, data: mode); |
143 | } |
144 | |
145 | /* |
146 | * frame functions |
147 | */ |
148 | int 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 | */ |
156 | void 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 = cpu_to_le16(usbhs_read(priv, USBVAL)); |
165 | req->wIndex = cpu_to_le16(usbhs_read(priv, USBINDX)); |
166 | req->wLength = cpu_to_le16(usbhs_read(priv, USBLENG)); |
167 | } |
168 | |
169 | void usbhs_usbreq_set_val(struct usbhs_priv *priv, struct usb_ctrlrequest *req) |
170 | { |
171 | usbhs_write(priv, USBREQ, data: (req->bRequest << 8) | req->bRequestType); |
172 | usbhs_write(priv, USBVAL, le16_to_cpu(req->wValue)); |
173 | usbhs_write(priv, USBINDX, le16_to_cpu(req->wIndex)); |
174 | usbhs_write(priv, USBLENG, le16_to_cpu(req->wLength)); |
175 | |
176 | usbhs_bset(priv, DCPCTR, SUREQ, SUREQ); |
177 | } |
178 | |
179 | /* |
180 | * bus/vbus functions |
181 | */ |
182 | void 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, mask: (USBRST | UACT), UACT); |
192 | } |
193 | |
194 | void usbhs_bus_send_reset(struct usbhs_priv *priv) |
195 | { |
196 | usbhs_bset(priv, DVSTCTR, mask: (USBRST | UACT), USBRST); |
197 | } |
198 | |
199 | int 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 | |
215 | int 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 | |
222 | static void usbhsc_bus_init(struct usbhs_priv *priv) |
223 | { |
224 | usbhs_write(priv, DVSTCTR, data: 0); |
225 | |
226 | usbhs_vbus_ctrl(priv, enable: 0); |
227 | } |
228 | |
229 | /* |
230 | * device configuration |
231 | */ |
232 | int 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 | */ |
274 | void 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, reg: sts_reg, data: ~(1 << bit) & pipe_mask); |
279 | } |
280 | |
281 | /* |
282 | * local functions |
283 | */ |
284 | static 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, mask: 0x000F, data: wait); |
291 | } |
292 | |
293 | static bool usbhsc_is_multi_clks(struct usbhs_priv *priv) |
294 | { |
295 | return priv->dparam.multi_clks; |
296 | } |
297 | |
298 | static int usbhsc_clk_get(struct device *dev, struct usbhs_priv *priv) |
299 | { |
300 | if (!usbhsc_is_multi_clks(priv)) |
301 | return 0; |
302 | |
303 | /* The first clock should exist */ |
304 | priv->clks[0] = of_clk_get(np: dev_of_node(dev), index: 0); |
305 | if (IS_ERR(ptr: priv->clks[0])) |
306 | return PTR_ERR(ptr: priv->clks[0]); |
307 | |
308 | /* |
309 | * To backward compatibility with old DT, this driver checks the return |
310 | * value if it's -ENOENT or not. |
311 | */ |
312 | priv->clks[1] = of_clk_get(np: dev_of_node(dev), index: 1); |
313 | if (PTR_ERR(ptr: priv->clks[1]) == -ENOENT) |
314 | priv->clks[1] = NULL; |
315 | else if (IS_ERR(ptr: priv->clks[1])) |
316 | return PTR_ERR(ptr: priv->clks[1]); |
317 | |
318 | return 0; |
319 | } |
320 | |
321 | static void usbhsc_clk_put(struct usbhs_priv *priv) |
322 | { |
323 | int i; |
324 | |
325 | if (!usbhsc_is_multi_clks(priv)) |
326 | return; |
327 | |
328 | for (i = 0; i < ARRAY_SIZE(priv->clks); i++) |
329 | clk_put(clk: priv->clks[i]); |
330 | } |
331 | |
332 | static int usbhsc_clk_prepare_enable(struct usbhs_priv *priv) |
333 | { |
334 | int i, ret; |
335 | |
336 | if (!usbhsc_is_multi_clks(priv)) |
337 | return 0; |
338 | |
339 | for (i = 0; i < ARRAY_SIZE(priv->clks); i++) { |
340 | ret = clk_prepare_enable(clk: priv->clks[i]); |
341 | if (ret) { |
342 | while (--i >= 0) |
343 | clk_disable_unprepare(clk: priv->clks[i]); |
344 | return ret; |
345 | } |
346 | } |
347 | |
348 | return ret; |
349 | } |
350 | |
351 | static void usbhsc_clk_disable_unprepare(struct usbhs_priv *priv) |
352 | { |
353 | int i; |
354 | |
355 | if (!usbhsc_is_multi_clks(priv)) |
356 | return; |
357 | |
358 | for (i = 0; i < ARRAY_SIZE(priv->clks); i++) |
359 | clk_disable_unprepare(clk: priv->clks[i]); |
360 | } |
361 | |
362 | /* |
363 | * platform default param |
364 | */ |
365 | |
366 | /* commonly used on old SH-Mobile SoCs */ |
367 | static struct renesas_usbhs_driver_pipe_config usbhsc_default_pipe[] = { |
368 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), |
369 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, false), |
370 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x18, false), |
371 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x28, true), |
372 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x38, true), |
373 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), |
374 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), |
375 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), |
376 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), |
377 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x07, false), |
378 | }; |
379 | |
380 | /* commonly used on newer SH-Mobile and R-Car SoCs */ |
381 | static struct renesas_usbhs_driver_pipe_config usbhsc_new_pipe[] = { |
382 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_CONTROL, 64, 0x00, false), |
383 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x08, true), |
384 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_ISOC, 1024, 0x28, true), |
385 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x48, true), |
386 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x58, true), |
387 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x68, true), |
388 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x04, false), |
389 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x05, false), |
390 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_INT, 64, 0x06, false), |
391 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x78, true), |
392 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x88, true), |
393 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0x98, true), |
394 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xa8, true), |
395 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xb8, true), |
396 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xc8, true), |
397 | RENESAS_USBHS_PIPE(USB_ENDPOINT_XFER_BULK, 512, 0xd8, true), |
398 | }; |
399 | |
400 | /* |
401 | * power control |
402 | */ |
403 | static void usbhsc_power_ctrl(struct usbhs_priv *priv, int enable) |
404 | { |
405 | struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
406 | struct device *dev = usbhs_priv_to_dev(priv); |
407 | |
408 | if (enable) { |
409 | /* enable PM */ |
410 | pm_runtime_get_sync(dev); |
411 | |
412 | /* enable clks */ |
413 | if (usbhsc_clk_prepare_enable(priv)) |
414 | return; |
415 | |
416 | /* enable platform power */ |
417 | usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); |
418 | |
419 | /* USB on */ |
420 | usbhs_sys_clock_ctrl(priv, enable); |
421 | } else { |
422 | /* USB off */ |
423 | usbhs_sys_clock_ctrl(priv, enable); |
424 | |
425 | /* disable platform power */ |
426 | usbhs_platform_call(priv, power_ctrl, pdev, priv->base, enable); |
427 | |
428 | /* disable clks */ |
429 | usbhsc_clk_disable_unprepare(priv); |
430 | |
431 | /* disable PM */ |
432 | pm_runtime_put_sync(dev); |
433 | } |
434 | } |
435 | |
436 | /* |
437 | * hotplug |
438 | */ |
439 | static void usbhsc_hotplug(struct usbhs_priv *priv) |
440 | { |
441 | struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
442 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
443 | int id; |
444 | int enable; |
445 | int cable; |
446 | int ret; |
447 | |
448 | /* |
449 | * get vbus status from platform |
450 | */ |
451 | enable = usbhs_mod_info_call(priv, get_vbus, pdev); |
452 | |
453 | /* |
454 | * get id from platform |
455 | */ |
456 | id = usbhs_platform_call(priv, get_id, pdev); |
457 | |
458 | if (enable && !mod) { |
459 | if (priv->edev) { |
460 | cable = extcon_get_state(edev: priv->edev, EXTCON_USB_HOST); |
461 | if ((cable > 0 && id != USBHS_HOST) || |
462 | (!cable && id != USBHS_GADGET)) { |
463 | dev_info(&pdev->dev, |
464 | "USB cable plugged in doesn't match the selected role!\n" ); |
465 | return; |
466 | } |
467 | } |
468 | |
469 | ret = usbhs_mod_change(priv, id); |
470 | if (ret < 0) |
471 | return; |
472 | |
473 | dev_dbg(&pdev->dev, "%s enable\n" , __func__); |
474 | |
475 | /* power on */ |
476 | if (usbhs_get_dparam(priv, runtime_pwctrl)) |
477 | usbhsc_power_ctrl(priv, enable); |
478 | |
479 | /* bus init */ |
480 | usbhsc_set_buswait(priv); |
481 | usbhsc_bus_init(priv); |
482 | |
483 | /* module start */ |
484 | usbhs_mod_call(priv, start, priv); |
485 | |
486 | } else if (!enable && mod) { |
487 | dev_dbg(&pdev->dev, "%s disable\n" , __func__); |
488 | |
489 | /* module stop */ |
490 | usbhs_mod_call(priv, stop, priv); |
491 | |
492 | /* bus init */ |
493 | usbhsc_bus_init(priv); |
494 | |
495 | /* power off */ |
496 | if (usbhs_get_dparam(priv, runtime_pwctrl)) |
497 | usbhsc_power_ctrl(priv, enable); |
498 | |
499 | usbhs_mod_change(priv, id: -1); |
500 | |
501 | /* reset phy for next connection */ |
502 | usbhs_platform_call(priv, phy_reset, pdev); |
503 | } |
504 | } |
505 | |
506 | /* |
507 | * notify hotplug |
508 | */ |
509 | static void usbhsc_notify_hotplug(struct work_struct *work) |
510 | { |
511 | struct usbhs_priv *priv = container_of(work, |
512 | struct usbhs_priv, |
513 | notify_hotplug_work.work); |
514 | usbhsc_hotplug(priv); |
515 | } |
516 | |
517 | int usbhsc_schedule_notify_hotplug(struct platform_device *pdev) |
518 | { |
519 | struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); |
520 | int delay = usbhs_get_dparam(priv, detection_delay); |
521 | |
522 | /* |
523 | * This functions will be called in interrupt. |
524 | * To make sure safety context, |
525 | * use workqueue for usbhs_notify_hotplug |
526 | */ |
527 | schedule_delayed_work(dwork: &priv->notify_hotplug_work, |
528 | delay: msecs_to_jiffies(m: delay)); |
529 | return 0; |
530 | } |
531 | |
532 | /* |
533 | * platform functions |
534 | */ |
535 | static const struct of_device_id usbhs_of_match[] = { |
536 | { |
537 | .compatible = "renesas,usbhs-r8a774c0" , |
538 | .data = &usbhs_rcar_gen3_with_pll_plat_info, |
539 | }, |
540 | { |
541 | .compatible = "renesas,usbhs-r8a7790" , |
542 | .data = &usbhs_rcar_gen2_plat_info, |
543 | }, |
544 | { |
545 | .compatible = "renesas,usbhs-r8a7791" , |
546 | .data = &usbhs_rcar_gen2_plat_info, |
547 | }, |
548 | { |
549 | .compatible = "renesas,usbhs-r8a7794" , |
550 | .data = &usbhs_rcar_gen2_plat_info, |
551 | }, |
552 | { |
553 | .compatible = "renesas,usbhs-r8a7795" , |
554 | .data = &usbhs_rcar_gen3_plat_info, |
555 | }, |
556 | { |
557 | .compatible = "renesas,usbhs-r8a7796" , |
558 | .data = &usbhs_rcar_gen3_plat_info, |
559 | }, |
560 | { |
561 | .compatible = "renesas,usbhs-r8a77990" , |
562 | .data = &usbhs_rcar_gen3_with_pll_plat_info, |
563 | }, |
564 | { |
565 | .compatible = "renesas,usbhs-r8a77995" , |
566 | .data = &usbhs_rcar_gen3_with_pll_plat_info, |
567 | }, |
568 | { |
569 | .compatible = "renesas,rcar-gen2-usbhs" , |
570 | .data = &usbhs_rcar_gen2_plat_info, |
571 | }, |
572 | { |
573 | .compatible = "renesas,rcar-gen3-usbhs" , |
574 | .data = &usbhs_rcar_gen3_plat_info, |
575 | }, |
576 | { |
577 | .compatible = "renesas,rza1-usbhs" , |
578 | .data = &usbhs_rza1_plat_info, |
579 | }, |
580 | { |
581 | .compatible = "renesas,rza2-usbhs" , |
582 | .data = &usbhs_rza2_plat_info, |
583 | }, |
584 | { }, |
585 | }; |
586 | MODULE_DEVICE_TABLE(of, usbhs_of_match); |
587 | |
588 | static int usbhs_probe(struct platform_device *pdev) |
589 | { |
590 | const struct renesas_usbhs_platform_info *info; |
591 | struct usbhs_priv *priv; |
592 | struct device *dev = &pdev->dev; |
593 | struct gpio_desc *gpiod; |
594 | int ret; |
595 | u32 tmp; |
596 | int irq; |
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 = platform_get_irq(pdev, 0); |
612 | if (irq < 0) |
613 | return irq; |
614 | |
615 | /* usb private data */ |
616 | priv = devm_kzalloc(dev, size: sizeof(*priv), GFP_KERNEL); |
617 | if (!priv) |
618 | return -ENOMEM; |
619 | |
620 | priv->base = devm_platform_ioremap_resource(pdev, index: 0); |
621 | if (IS_ERR(ptr: priv->base)) |
622 | return PTR_ERR(ptr: priv->base); |
623 | |
624 | if (of_property_read_bool(np: dev_of_node(dev), propname: "extcon" )) { |
625 | priv->edev = extcon_get_edev_by_phandle(dev, index: 0); |
626 | if (IS_ERR(ptr: priv->edev)) |
627 | return PTR_ERR(ptr: priv->edev); |
628 | } |
629 | |
630 | priv->rsts = devm_reset_control_array_get_optional_shared(dev); |
631 | if (IS_ERR(ptr: priv->rsts)) |
632 | return PTR_ERR(ptr: priv->rsts); |
633 | |
634 | /* |
635 | * care platform info |
636 | */ |
637 | |
638 | priv->dparam = info->driver_param; |
639 | |
640 | if (!info->platform_callback.get_id) { |
641 | dev_err(dev, "no platform callbacks\n" ); |
642 | return -EINVAL; |
643 | } |
644 | priv->pfunc = &info->platform_callback; |
645 | |
646 | /* set default param if platform doesn't have */ |
647 | if (usbhs_get_dparam(priv, has_new_pipe_configs)) { |
648 | priv->dparam.pipe_configs = usbhsc_new_pipe; |
649 | priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_new_pipe); |
650 | } else if (!priv->dparam.pipe_configs) { |
651 | priv->dparam.pipe_configs = usbhsc_default_pipe; |
652 | priv->dparam.pipe_size = ARRAY_SIZE(usbhsc_default_pipe); |
653 | } |
654 | if (!priv->dparam.pio_dma_border) |
655 | priv->dparam.pio_dma_border = 64; /* 64byte */ |
656 | if (!of_property_read_u32(np: dev_of_node(dev), propname: "renesas,buswait" , out_value: &tmp)) |
657 | priv->dparam.buswait_bwait = tmp; |
658 | gpiod = devm_gpiod_get_optional(dev, con_id: "renesas,enable" , flags: GPIOD_IN); |
659 | if (IS_ERR(ptr: gpiod)) |
660 | return PTR_ERR(ptr: gpiod); |
661 | |
662 | /* FIXME */ |
663 | /* runtime power control ? */ |
664 | if (priv->pfunc->get_vbus) |
665 | usbhs_get_dparam(priv, runtime_pwctrl) = 1; |
666 | |
667 | /* |
668 | * priv settings |
669 | */ |
670 | priv->irq = irq; |
671 | priv->pdev = pdev; |
672 | INIT_DELAYED_WORK(&priv->notify_hotplug_work, usbhsc_notify_hotplug); |
673 | spin_lock_init(usbhs_priv_to_lock(priv)); |
674 | |
675 | /* call pipe and module init */ |
676 | ret = usbhs_pipe_probe(priv); |
677 | if (ret < 0) |
678 | return ret; |
679 | |
680 | ret = usbhs_fifo_probe(priv); |
681 | if (ret < 0) |
682 | goto probe_end_pipe_exit; |
683 | |
684 | ret = usbhs_mod_probe(priv); |
685 | if (ret < 0) |
686 | goto probe_end_fifo_exit; |
687 | |
688 | /* dev_set_drvdata should be called after usbhs_mod_init */ |
689 | platform_set_drvdata(pdev, data: priv); |
690 | |
691 | ret = reset_control_deassert(rstc: priv->rsts); |
692 | if (ret) |
693 | goto probe_fail_rst; |
694 | |
695 | ret = usbhsc_clk_get(dev, priv); |
696 | if (ret) |
697 | goto probe_fail_clks; |
698 | |
699 | /* |
700 | * deviece reset here because |
701 | * USB device might be used in boot loader. |
702 | */ |
703 | usbhs_sys_clock_ctrl(priv, enable: 0); |
704 | |
705 | /* check GPIO determining if USB function should be enabled */ |
706 | if (gpiod) { |
707 | ret = !gpiod_get_value(desc: gpiod); |
708 | if (ret) { |
709 | dev_warn(dev, "USB function not selected (GPIO)\n" ); |
710 | ret = -ENOTSUPP; |
711 | goto probe_end_mod_exit; |
712 | } |
713 | } |
714 | |
715 | /* |
716 | * platform call |
717 | * |
718 | * USB phy setup might depend on CPU/Board. |
719 | * If platform has its callback functions, |
720 | * call it here. |
721 | */ |
722 | ret = usbhs_platform_call(priv, hardware_init, pdev); |
723 | if (ret < 0) { |
724 | dev_err(dev, "platform init failed.\n" ); |
725 | goto probe_end_mod_exit; |
726 | } |
727 | |
728 | /* reset phy for connection */ |
729 | usbhs_platform_call(priv, phy_reset, pdev); |
730 | |
731 | /* power control */ |
732 | pm_runtime_enable(dev); |
733 | if (!usbhs_get_dparam(priv, runtime_pwctrl)) { |
734 | usbhsc_power_ctrl(priv, enable: 1); |
735 | usbhs_mod_autonomy_mode(priv); |
736 | } else { |
737 | usbhs_mod_non_autonomy_mode(priv); |
738 | } |
739 | |
740 | /* |
741 | * manual call notify_hotplug for cold plug |
742 | */ |
743 | usbhsc_schedule_notify_hotplug(pdev); |
744 | |
745 | dev_info(dev, "probed\n" ); |
746 | |
747 | return ret; |
748 | |
749 | probe_end_mod_exit: |
750 | usbhsc_clk_put(priv); |
751 | probe_fail_clks: |
752 | reset_control_assert(rstc: priv->rsts); |
753 | probe_fail_rst: |
754 | usbhs_mod_remove(priv); |
755 | probe_end_fifo_exit: |
756 | usbhs_fifo_remove(priv); |
757 | probe_end_pipe_exit: |
758 | usbhs_pipe_remove(priv); |
759 | |
760 | dev_info(dev, "probe failed (%d)\n" , ret); |
761 | |
762 | return ret; |
763 | } |
764 | |
765 | static void usbhs_remove(struct platform_device *pdev) |
766 | { |
767 | struct usbhs_priv *priv = usbhs_pdev_to_priv(pdev); |
768 | |
769 | dev_dbg(&pdev->dev, "usb remove\n" ); |
770 | |
771 | /* power off */ |
772 | if (!usbhs_get_dparam(priv, runtime_pwctrl)) |
773 | usbhsc_power_ctrl(priv, enable: 0); |
774 | |
775 | pm_runtime_disable(dev: &pdev->dev); |
776 | |
777 | usbhs_platform_call(priv, hardware_exit, pdev); |
778 | usbhsc_clk_put(priv); |
779 | reset_control_assert(rstc: priv->rsts); |
780 | usbhs_mod_remove(priv); |
781 | usbhs_fifo_remove(priv); |
782 | usbhs_pipe_remove(priv); |
783 | } |
784 | |
785 | static __maybe_unused int usbhsc_suspend(struct device *dev) |
786 | { |
787 | struct usbhs_priv *priv = dev_get_drvdata(dev); |
788 | struct usbhs_mod *mod = usbhs_mod_get_current(priv); |
789 | |
790 | if (mod) { |
791 | usbhs_mod_call(priv, stop, priv); |
792 | usbhs_mod_change(priv, id: -1); |
793 | } |
794 | |
795 | if (mod || !usbhs_get_dparam(priv, runtime_pwctrl)) |
796 | usbhsc_power_ctrl(priv, enable: 0); |
797 | |
798 | return 0; |
799 | } |
800 | |
801 | static __maybe_unused int usbhsc_resume(struct device *dev) |
802 | { |
803 | struct usbhs_priv *priv = dev_get_drvdata(dev); |
804 | struct platform_device *pdev = usbhs_priv_to_pdev(priv); |
805 | |
806 | if (!usbhs_get_dparam(priv, runtime_pwctrl)) { |
807 | usbhsc_power_ctrl(priv, enable: 1); |
808 | usbhs_mod_autonomy_mode(priv); |
809 | } |
810 | |
811 | usbhs_platform_call(priv, phy_reset, pdev); |
812 | |
813 | usbhsc_schedule_notify_hotplug(pdev); |
814 | |
815 | return 0; |
816 | } |
817 | |
818 | static SIMPLE_DEV_PM_OPS(usbhsc_pm_ops, usbhsc_suspend, usbhsc_resume); |
819 | |
820 | static struct platform_driver renesas_usbhs_driver = { |
821 | .driver = { |
822 | .name = "renesas_usbhs" , |
823 | .pm = &usbhsc_pm_ops, |
824 | .of_match_table = usbhs_of_match, |
825 | }, |
826 | .probe = usbhs_probe, |
827 | .remove_new = usbhs_remove, |
828 | }; |
829 | |
830 | module_platform_driver(renesas_usbhs_driver); |
831 | |
832 | MODULE_LICENSE("GPL" ); |
833 | MODULE_DESCRIPTION("Renesas USB driver" ); |
834 | MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>" ); |
835 | |