1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2012 Freescale Semiconductor, Inc.
4 * Copyright 2025 NXP
5 * Copyright (C) 2012 Marek Vasut <marex@denx.de>
6 * on behalf of DENX Software Engineering GmbH
7 */
8
9 #include <linux/module.h>
10 #include <linux/irq.h>
11 #include <linux/of.h>
12 #include <linux/of_platform.h>
13 #include <linux/platform_device.h>
14 #include <linux/pm_runtime.h>
15 #include <linux/usb/chipidea.h>
16 #include <linux/usb/of.h>
17 #include <linux/clk.h>
18 #include <linux/pinctrl/consumer.h>
19 #include <linux/pm_qos.h>
20
21 #include "ci.h"
22 #include "ci_hdrc_imx.h"
23
24 struct ci_hdrc_imx_platform_flag {
25 unsigned int flags;
26 };
27
28 static const struct ci_hdrc_imx_platform_flag imx23_usb_data = {
29 .flags = CI_HDRC_TURN_VBUS_EARLY_ON |
30 CI_HDRC_DISABLE_STREAMING,
31 };
32
33 static const struct ci_hdrc_imx_platform_flag imx27_usb_data = {
34 .flags = CI_HDRC_DISABLE_STREAMING,
35 };
36
37 static const struct ci_hdrc_imx_platform_flag imx28_usb_data = {
38 .flags = CI_HDRC_IMX28_WRITE_FIX |
39 CI_HDRC_TURN_VBUS_EARLY_ON |
40 CI_HDRC_DISABLE_STREAMING,
41 };
42
43 static const struct ci_hdrc_imx_platform_flag imx6q_usb_data = {
44 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
45 CI_HDRC_TURN_VBUS_EARLY_ON |
46 CI_HDRC_DISABLE_STREAMING,
47 };
48
49 static const struct ci_hdrc_imx_platform_flag imx6sl_usb_data = {
50 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
51 CI_HDRC_TURN_VBUS_EARLY_ON |
52 CI_HDRC_DISABLE_HOST_STREAMING,
53 };
54
55 static const struct ci_hdrc_imx_platform_flag imx6sx_usb_data = {
56 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
57 CI_HDRC_TURN_VBUS_EARLY_ON |
58 CI_HDRC_DISABLE_HOST_STREAMING,
59 };
60
61 static const struct ci_hdrc_imx_platform_flag imx6ul_usb_data = {
62 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
63 CI_HDRC_TURN_VBUS_EARLY_ON |
64 CI_HDRC_DISABLE_DEVICE_STREAMING,
65 };
66
67 static const struct ci_hdrc_imx_platform_flag imx7d_usb_data = {
68 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM,
69 };
70
71 static const struct ci_hdrc_imx_platform_flag imx7ulp_usb_data = {
72 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
73 CI_HDRC_HAS_PORTSC_PEC_MISSED |
74 CI_HDRC_PMQOS,
75 };
76
77 static const struct ci_hdrc_imx_platform_flag imx8ulp_usb_data = {
78 .flags = CI_HDRC_SUPPORTS_RUNTIME_PM |
79 CI_HDRC_HAS_PORTSC_PEC_MISSED,
80 };
81
82 static const struct ci_hdrc_imx_platform_flag s32g_usb_data = {
83 .flags = CI_HDRC_DISABLE_HOST_STREAMING,
84 };
85
86 static const struct of_device_id ci_hdrc_imx_dt_ids[] = {
87 { .compatible = "fsl,imx23-usb", .data = &imx23_usb_data},
88 { .compatible = "fsl,imx28-usb", .data = &imx28_usb_data},
89 { .compatible = "fsl,imx27-usb", .data = &imx27_usb_data},
90 { .compatible = "fsl,imx6q-usb", .data = &imx6q_usb_data},
91 { .compatible = "fsl,imx6sl-usb", .data = &imx6sl_usb_data},
92 { .compatible = "fsl,imx6sx-usb", .data = &imx6sx_usb_data},
93 { .compatible = "fsl,imx6ul-usb", .data = &imx6ul_usb_data},
94 { .compatible = "fsl,imx7d-usb", .data = &imx7d_usb_data},
95 { .compatible = "fsl,imx7ulp-usb", .data = &imx7ulp_usb_data},
96 { .compatible = "fsl,imx8ulp-usb", .data = &imx8ulp_usb_data},
97 { .compatible = "nxp,s32g2-usb", .data = &s32g_usb_data},
98 { /* sentinel */ }
99 };
100 MODULE_DEVICE_TABLE(of, ci_hdrc_imx_dt_ids);
101
102 struct ci_hdrc_imx_data {
103 struct usb_phy *phy;
104 struct platform_device *ci_pdev;
105 struct clk *clk;
106 struct clk *clk_wakeup;
107 struct imx_usbmisc_data *usbmisc_data;
108 int wakeup_irq;
109 bool supports_runtime_pm;
110 bool override_phy_control;
111 bool in_lpm;
112 struct pinctrl *pinctrl;
113 struct pinctrl_state *pinctrl_hsic_active;
114 struct regulator *hsic_pad_regulator;
115 /* SoC before i.mx6 (except imx23/imx28) needs three clks */
116 bool need_three_clks;
117 struct clk *clk_ipg;
118 struct clk *clk_ahb;
119 struct clk *clk_per;
120 /* --------------------------------- */
121 struct pm_qos_request pm_qos_req;
122 const struct ci_hdrc_imx_platform_flag *plat_data;
123 };
124
125 /* Common functions shared by usbmisc drivers */
126
usbmisc_get_init_data(struct device * dev)127 static struct imx_usbmisc_data *usbmisc_get_init_data(struct device *dev)
128 {
129 struct platform_device *misc_pdev;
130 struct device_node *np = dev->of_node;
131 struct of_phandle_args args;
132 struct imx_usbmisc_data *data;
133 int ret;
134
135 /*
136 * In case the fsl,usbmisc property is not present this device doesn't
137 * need usbmisc. Return NULL (which is no error here)
138 */
139 if (!of_property_present(np, "fsl,usbmisc"))
140 return NULL;
141
142 data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL);
143 if (!data)
144 return ERR_PTR(-ENOMEM);
145
146 ret = of_parse_phandle_with_args(np, "fsl,usbmisc", "#index-cells",
147 0, &args);
148 if (ret) {
149 dev_err(dev, "Failed to parse property fsl,usbmisc, errno %d\n",
150 ret);
151 return ERR_PTR(ret);
152 }
153
154 data->index = args.args[0];
155
156 misc_pdev = of_find_device_by_node(args.np);
157 of_node_put(args.np);
158
159 if (!misc_pdev)
160 return ERR_PTR(-EPROBE_DEFER);
161
162 if (!platform_get_drvdata(misc_pdev)) {
163 put_device(&misc_pdev->dev);
164 return ERR_PTR(-EPROBE_DEFER);
165 }
166 data->dev = &misc_pdev->dev;
167
168 /*
169 * Check the various over current related properties. If over current
170 * detection is disabled we're not interested in the polarity.
171 */
172 if (of_property_read_bool(np, "disable-over-current")) {
173 data->disable_oc = 1;
174 } else if (of_property_read_bool(np, "over-current-active-high")) {
175 data->oc_pol_active_low = 0;
176 data->oc_pol_configured = 1;
177 } else if (of_property_read_bool(np, "over-current-active-low")) {
178 data->oc_pol_active_low = 1;
179 data->oc_pol_configured = 1;
180 } else {
181 dev_warn(dev, "No over current polarity defined\n");
182 }
183
184 data->pwr_pol = of_property_read_bool(np, "power-active-high");
185 data->evdo = of_property_read_bool(np, "external-vbus-divider");
186
187 if (of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI)
188 data->ulpi = 1;
189
190 if (of_property_read_u32(np, "samsung,picophy-pre-emp-curr-control",
191 &data->emp_curr_control))
192 data->emp_curr_control = -1;
193 if (of_property_read_u32(np, "samsung,picophy-dc-vol-level-adjust",
194 &data->dc_vol_level_adjust))
195 data->dc_vol_level_adjust = -1;
196 if (of_property_read_u32(np, "fsl,picophy-rise-fall-time-adjust",
197 &data->rise_fall_time_adjust))
198 data->rise_fall_time_adjust = -1;
199
200 return data;
201 }
202
203 /* End of common functions shared by usbmisc drivers*/
imx_get_clks(struct device * dev)204 static int imx_get_clks(struct device *dev)
205 {
206 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
207 int ret = 0;
208
209 data->clk_ipg = devm_clk_get(dev, "ipg");
210 if (IS_ERR(data->clk_ipg)) {
211 /* If the platform only needs one primary clock */
212 data->clk = devm_clk_get(dev, NULL);
213 if (IS_ERR(data->clk)) {
214 ret = PTR_ERR(data->clk);
215 dev_err(dev,
216 "Failed to get clks, err=%ld,%ld\n",
217 PTR_ERR(data->clk), PTR_ERR(data->clk_ipg));
218 return ret;
219 }
220 /* Get wakeup clock. Not all of the platforms need to
221 * handle this clock. So make it optional.
222 */
223 data->clk_wakeup = devm_clk_get_optional(dev, "usb_wakeup");
224 if (IS_ERR(data->clk_wakeup))
225 ret = dev_err_probe(dev, PTR_ERR(data->clk_wakeup),
226 "Failed to get wakeup clk\n");
227 return ret;
228 }
229
230 data->clk_ahb = devm_clk_get(dev, "ahb");
231 if (IS_ERR(data->clk_ahb)) {
232 ret = PTR_ERR(data->clk_ahb);
233 dev_err(dev,
234 "Failed to get ahb clock, err=%d\n", ret);
235 return ret;
236 }
237
238 data->clk_per = devm_clk_get(dev, "per");
239 if (IS_ERR(data->clk_per)) {
240 ret = PTR_ERR(data->clk_per);
241 dev_err(dev,
242 "Failed to get per clock, err=%d\n", ret);
243 return ret;
244 }
245
246 data->need_three_clks = true;
247 return ret;
248 }
249
imx_prepare_enable_clks(struct device * dev)250 static int imx_prepare_enable_clks(struct device *dev)
251 {
252 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
253 int ret = 0;
254
255 if (data->need_three_clks) {
256 ret = clk_prepare_enable(data->clk_ipg);
257 if (ret) {
258 dev_err(dev,
259 "Failed to prepare/enable ipg clk, err=%d\n",
260 ret);
261 return ret;
262 }
263
264 ret = clk_prepare_enable(data->clk_ahb);
265 if (ret) {
266 dev_err(dev,
267 "Failed to prepare/enable ahb clk, err=%d\n",
268 ret);
269 clk_disable_unprepare(data->clk_ipg);
270 return ret;
271 }
272
273 ret = clk_prepare_enable(data->clk_per);
274 if (ret) {
275 dev_err(dev,
276 "Failed to prepare/enable per clk, err=%d\n",
277 ret);
278 clk_disable_unprepare(data->clk_ahb);
279 clk_disable_unprepare(data->clk_ipg);
280 return ret;
281 }
282 } else {
283 ret = clk_prepare_enable(data->clk);
284 if (ret) {
285 dev_err(dev,
286 "Failed to prepare/enable clk, err=%d\n",
287 ret);
288 return ret;
289 }
290 }
291
292 return ret;
293 }
294
imx_disable_unprepare_clks(struct device * dev)295 static void imx_disable_unprepare_clks(struct device *dev)
296 {
297 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
298
299 if (data->need_three_clks) {
300 clk_disable_unprepare(data->clk_per);
301 clk_disable_unprepare(data->clk_ahb);
302 clk_disable_unprepare(data->clk_ipg);
303 } else {
304 clk_disable_unprepare(data->clk);
305 }
306 }
307
ci_hdrc_imx_notify_event(struct ci_hdrc * ci,unsigned int event)308 static int ci_hdrc_imx_notify_event(struct ci_hdrc *ci, unsigned int event)
309 {
310 struct device *dev = ci->dev->parent;
311 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
312 int ret = 0;
313 struct imx_usbmisc_data *mdata = data->usbmisc_data;
314
315 switch (event) {
316 case CI_HDRC_IMX_HSIC_ACTIVE_EVENT:
317 if (data->pinctrl) {
318 ret = pinctrl_select_state(data->pinctrl,
319 data->pinctrl_hsic_active);
320 if (ret)
321 dev_err(dev,
322 "hsic_active select failed, err=%d\n",
323 ret);
324 }
325 break;
326 case CI_HDRC_IMX_HSIC_SUSPEND_EVENT:
327 ret = imx_usbmisc_hsic_set_connect(mdata);
328 if (ret)
329 dev_err(dev,
330 "hsic_set_connect failed, err=%d\n", ret);
331 break;
332 case CI_HDRC_CONTROLLER_VBUS_EVENT:
333 if (ci->vbus_active)
334 ret = imx_usbmisc_charger_detection(mdata, true);
335 else
336 ret = imx_usbmisc_charger_detection(mdata, false);
337 if (ci->usb_phy)
338 schedule_work(&ci->usb_phy->chg_work);
339 break;
340 case CI_HDRC_CONTROLLER_PULLUP_EVENT:
341 if (ci->role == CI_ROLE_GADGET &&
342 ci->gadget.speed == USB_SPEED_HIGH)
343 imx_usbmisc_pullup(data->usbmisc_data,
344 ci->gadget.connected);
345 break;
346 default:
347 break;
348 }
349
350 return ret;
351 }
352
ci_wakeup_irq_handler(int irq,void * data)353 static irqreturn_t ci_wakeup_irq_handler(int irq, void *data)
354 {
355 struct ci_hdrc_imx_data *imx_data = data;
356
357 disable_irq_nosync(irq);
358 pm_runtime_resume(&imx_data->ci_pdev->dev);
359
360 return IRQ_HANDLED;
361 }
362
ci_hdrc_imx_disable_regulator(void * arg)363 static void ci_hdrc_imx_disable_regulator(void *arg)
364 {
365 struct ci_hdrc_imx_data *data = arg;
366
367 regulator_disable(data->hsic_pad_regulator);
368 }
369
ci_hdrc_imx_probe(struct platform_device * pdev)370 static int ci_hdrc_imx_probe(struct platform_device *pdev)
371 {
372 struct ci_hdrc_imx_data *data;
373 struct ci_hdrc_platform_data pdata = {
374 .name = dev_name(&pdev->dev),
375 .capoffset = DEF_CAPOFFSET,
376 .flags = CI_HDRC_HAS_SHORT_PKT_LIMIT,
377 .notify_event = ci_hdrc_imx_notify_event,
378 };
379 int ret;
380 const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
381 struct device_node *np = pdev->dev.of_node;
382 struct device *dev = &pdev->dev;
383
384 imx_platform_flag = of_device_get_match_data(&pdev->dev);
385
386 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
387 if (!data)
388 return -ENOMEM;
389
390 data->plat_data = imx_platform_flag;
391 pdata.flags |= imx_platform_flag->flags;
392 platform_set_drvdata(pdev, data);
393 data->usbmisc_data = usbmisc_get_init_data(dev);
394 if (IS_ERR(data->usbmisc_data))
395 return PTR_ERR(data->usbmisc_data);
396
397 if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
398 && data->usbmisc_data) {
399 pdata.flags |= CI_HDRC_IMX_IS_HSIC;
400 data->usbmisc_data->hsic = 1;
401 data->pinctrl = devm_pinctrl_get(dev);
402 if (PTR_ERR(data->pinctrl) == -ENODEV)
403 data->pinctrl = NULL;
404 else if (IS_ERR(data->pinctrl)) {
405 ret = dev_err_probe(dev, PTR_ERR(data->pinctrl),
406 "pinctrl get failed\n");
407 goto err_put;
408 }
409
410 data->hsic_pad_regulator =
411 devm_regulator_get_optional(dev, "hsic");
412 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
413 /* no pad regulator is needed */
414 data->hsic_pad_regulator = NULL;
415 } else if (IS_ERR(data->hsic_pad_regulator)) {
416 ret = dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
417 "Get HSIC pad regulator error\n");
418 goto err_put;
419 }
420
421 if (data->hsic_pad_regulator) {
422 ret = regulator_enable(data->hsic_pad_regulator);
423 if (ret) {
424 dev_err(dev,
425 "Failed to enable HSIC pad regulator\n");
426 goto err_put;
427 }
428 ret = devm_add_action_or_reset(dev,
429 ci_hdrc_imx_disable_regulator, data);
430 if (ret) {
431 dev_err(dev,
432 "Failed to add regulator devm action\n");
433 goto err_put;
434 }
435 }
436 }
437
438 /* HSIC pinctrl handling */
439 if (data->pinctrl) {
440 struct pinctrl_state *pinctrl_hsic_idle;
441
442 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
443 if (IS_ERR(pinctrl_hsic_idle)) {
444 dev_err(dev,
445 "pinctrl_hsic_idle lookup failed, err=%ld\n",
446 PTR_ERR(pinctrl_hsic_idle));
447 ret = PTR_ERR(pinctrl_hsic_idle);
448 goto err_put;
449 }
450
451 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
452 if (ret) {
453 dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
454 goto err_put;
455 }
456
457 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
458 "active");
459 if (IS_ERR(data->pinctrl_hsic_active)) {
460 dev_err(dev,
461 "pinctrl_hsic_active lookup failed, err=%ld\n",
462 PTR_ERR(data->pinctrl_hsic_active));
463 ret = PTR_ERR(data->pinctrl_hsic_active);
464 goto err_put;
465 }
466 }
467
468 if (pdata.flags & CI_HDRC_PMQOS)
469 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
470
471 ret = imx_get_clks(dev);
472 if (ret)
473 goto qos_remove_request;
474
475 ret = imx_prepare_enable_clks(dev);
476 if (ret)
477 goto qos_remove_request;
478
479 ret = clk_prepare_enable(data->clk_wakeup);
480 if (ret)
481 goto err_wakeup_clk;
482
483 data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
484 if (IS_ERR(data->phy)) {
485 ret = PTR_ERR(data->phy);
486 if (ret != -ENODEV) {
487 dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n");
488 goto err_clk;
489 }
490 data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
491 if (IS_ERR(data->phy)) {
492 ret = PTR_ERR(data->phy);
493 if (ret == -ENODEV) {
494 data->phy = NULL;
495 } else {
496 dev_err_probe(dev, ret, "Failed to parse phys\n");
497 goto err_clk;
498 }
499 }
500 }
501
502 pdata.usb_phy = data->phy;
503 if (data->usbmisc_data)
504 data->usbmisc_data->usb_phy = data->phy;
505
506 if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
507 of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
508 of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
509 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
510 data->override_phy_control = true;
511 ret = usb_phy_init(pdata.usb_phy);
512 if (ret) {
513 dev_err(dev, "Failed to init phy\n");
514 goto err_clk;
515 }
516 }
517
518 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
519 data->supports_runtime_pm = true;
520
521 data->wakeup_irq = platform_get_irq_optional(pdev, 1);
522 if (data->wakeup_irq > 0) {
523 ret = devm_request_threaded_irq(dev, data->wakeup_irq,
524 NULL, ci_wakeup_irq_handler,
525 IRQF_ONESHOT | IRQF_NO_AUTOEN,
526 pdata.name, data);
527 if (ret)
528 goto err_clk;
529 }
530
531 ret = imx_usbmisc_init(data->usbmisc_data);
532 if (ret) {
533 dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
534 goto phy_shutdown;
535 }
536
537 data->ci_pdev = ci_hdrc_add_device(dev,
538 pdev->resource, pdev->num_resources,
539 &pdata);
540 if (IS_ERR(data->ci_pdev)) {
541 ret = PTR_ERR(data->ci_pdev);
542 dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
543 goto phy_shutdown;
544 }
545
546 if (data->usbmisc_data) {
547 if (!IS_ERR(pdata.id_extcon.edev) ||
548 of_property_read_bool(np, "usb-role-switch"))
549 data->usbmisc_data->ext_id = 1;
550
551 if (!IS_ERR(pdata.vbus_extcon.edev) ||
552 of_property_read_bool(np, "usb-role-switch"))
553 data->usbmisc_data->ext_vbus = 1;
554
555 /* usbmisc needs to know dr mode to choose wakeup setting */
556 data->usbmisc_data->available_role =
557 ci_hdrc_query_available_role(data->ci_pdev);
558 }
559
560 ret = imx_usbmisc_init_post(data->usbmisc_data);
561 if (ret) {
562 dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
563 goto disable_device;
564 }
565
566 if (data->supports_runtime_pm) {
567 pm_runtime_set_active(dev);
568 pm_runtime_enable(dev);
569 }
570
571 device_set_wakeup_capable(dev, true);
572
573 return 0;
574
575 disable_device:
576 ci_hdrc_remove_device(data->ci_pdev);
577 phy_shutdown:
578 if (data->override_phy_control)
579 usb_phy_shutdown(data->phy);
580 err_clk:
581 clk_disable_unprepare(data->clk_wakeup);
582 err_wakeup_clk:
583 imx_disable_unprepare_clks(dev);
584 qos_remove_request:
585 if (pdata.flags & CI_HDRC_PMQOS)
586 cpu_latency_qos_remove_request(&data->pm_qos_req);
587 data->ci_pdev = NULL;
588 err_put:
589 if (data->usbmisc_data)
590 put_device(data->usbmisc_data->dev);
591 return ret;
592 }
593
ci_hdrc_imx_remove(struct platform_device * pdev)594 static void ci_hdrc_imx_remove(struct platform_device *pdev)
595 {
596 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
597
598 if (data->supports_runtime_pm) {
599 pm_runtime_get_sync(&pdev->dev);
600 pm_runtime_disable(&pdev->dev);
601 pm_runtime_put_noidle(&pdev->dev);
602 }
603 if (data->ci_pdev)
604 ci_hdrc_remove_device(data->ci_pdev);
605 if (data->override_phy_control)
606 usb_phy_shutdown(data->phy);
607 if (data->ci_pdev) {
608 imx_disable_unprepare_clks(&pdev->dev);
609 clk_disable_unprepare(data->clk_wakeup);
610 if (data->plat_data->flags & CI_HDRC_PMQOS)
611 cpu_latency_qos_remove_request(&data->pm_qos_req);
612 }
613 if (data->usbmisc_data)
614 put_device(data->usbmisc_data->dev);
615 }
616
ci_hdrc_imx_shutdown(struct platform_device * pdev)617 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
618 {
619 ci_hdrc_imx_remove(pdev);
620 }
621
imx_controller_suspend(struct device * dev,pm_message_t msg)622 static int imx_controller_suspend(struct device *dev,
623 pm_message_t msg)
624 {
625 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
626 int ret = 0;
627
628 dev_dbg(dev, "at %s\n", __func__);
629
630 ret = imx_usbmisc_suspend(data->usbmisc_data,
631 PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
632 if (ret) {
633 dev_err(dev,
634 "usbmisc suspend failed, ret=%d\n", ret);
635 return ret;
636 }
637
638 imx_disable_unprepare_clks(dev);
639
640 if (data->wakeup_irq > 0)
641 enable_irq(data->wakeup_irq);
642
643 if (data->plat_data->flags & CI_HDRC_PMQOS)
644 cpu_latency_qos_remove_request(&data->pm_qos_req);
645
646 data->in_lpm = true;
647
648 return 0;
649 }
650
imx_controller_resume(struct device * dev,pm_message_t msg)651 static int imx_controller_resume(struct device *dev,
652 pm_message_t msg)
653 {
654 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
655 int ret = 0;
656
657 dev_dbg(dev, "at %s\n", __func__);
658
659 if (!data->in_lpm) {
660 WARN_ON(1);
661 return 0;
662 }
663
664 if (data->plat_data->flags & CI_HDRC_PMQOS)
665 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
666
667 if (data->wakeup_irq > 0 &&
668 !irqd_irq_disabled(irq_get_irq_data(data->wakeup_irq)))
669 disable_irq_nosync(data->wakeup_irq);
670
671 ret = imx_prepare_enable_clks(dev);
672 if (ret)
673 return ret;
674
675 data->in_lpm = false;
676
677 ret = imx_usbmisc_resume(data->usbmisc_data,
678 PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
679 if (ret) {
680 dev_err(dev, "usbmisc resume failed, ret=%d\n", ret);
681 goto clk_disable;
682 }
683
684 return 0;
685
686 clk_disable:
687 imx_disable_unprepare_clks(dev);
688 return ret;
689 }
690
ci_hdrc_imx_suspend(struct device * dev)691 static int ci_hdrc_imx_suspend(struct device *dev)
692 {
693 int ret;
694
695 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
696
697 if (data->in_lpm)
698 /* The core's suspend doesn't run */
699 return 0;
700
701 ret = imx_controller_suspend(dev, PMSG_SUSPEND);
702 if (ret)
703 return ret;
704
705 pinctrl_pm_select_sleep_state(dev);
706
707 if (data->wakeup_irq > 0 && device_may_wakeup(dev))
708 enable_irq_wake(data->wakeup_irq);
709
710 return ret;
711 }
712
ci_hdrc_imx_resume(struct device * dev)713 static int ci_hdrc_imx_resume(struct device *dev)
714 {
715 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
716 int ret;
717
718 if (data->wakeup_irq > 0 && device_may_wakeup(dev))
719 disable_irq_wake(data->wakeup_irq);
720
721 pinctrl_pm_select_default_state(dev);
722 ret = imx_controller_resume(dev, PMSG_RESUME);
723 if (!ret && data->supports_runtime_pm) {
724 pm_runtime_disable(dev);
725 pm_runtime_set_active(dev);
726 pm_runtime_enable(dev);
727 }
728
729 return ret;
730 }
731
ci_hdrc_imx_runtime_suspend(struct device * dev)732 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
733 {
734 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
735
736 if (data->in_lpm) {
737 WARN_ON(1);
738 return 0;
739 }
740
741 return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND);
742 }
743
ci_hdrc_imx_runtime_resume(struct device * dev)744 static int ci_hdrc_imx_runtime_resume(struct device *dev)
745 {
746 return imx_controller_resume(dev, PMSG_AUTO_RESUME);
747 }
748
749 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
750 SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
751 RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend, ci_hdrc_imx_runtime_resume, NULL)
752 };
753 static struct platform_driver ci_hdrc_imx_driver = {
754 .probe = ci_hdrc_imx_probe,
755 .remove = ci_hdrc_imx_remove,
756 .shutdown = ci_hdrc_imx_shutdown,
757 .driver = {
758 .name = "imx_usb",
759 .of_match_table = ci_hdrc_imx_dt_ids,
760 .pm = pm_ptr(&ci_hdrc_imx_pm_ops),
761 },
762 };
763
764 module_platform_driver(ci_hdrc_imx_driver);
765
766 MODULE_ALIAS("platform:imx-usb");
767 MODULE_LICENSE("GPL");
768 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
769 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
770 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
771