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 imx_usbmisc_pullup(data->usbmisc_data,
343 ci->gadget.connected);
344 break;
345 default:
346 break;
347 }
348
349 return ret;
350 }
351
ci_wakeup_irq_handler(int irq,void * data)352 static irqreturn_t ci_wakeup_irq_handler(int irq, void *data)
353 {
354 struct ci_hdrc_imx_data *imx_data = data;
355
356 disable_irq_nosync(irq);
357 pm_runtime_resume(&imx_data->ci_pdev->dev);
358
359 return IRQ_HANDLED;
360 }
361
ci_hdrc_imx_disable_regulator(void * arg)362 static void ci_hdrc_imx_disable_regulator(void *arg)
363 {
364 struct ci_hdrc_imx_data *data = arg;
365
366 regulator_disable(data->hsic_pad_regulator);
367 }
368
ci_hdrc_imx_probe(struct platform_device * pdev)369 static int ci_hdrc_imx_probe(struct platform_device *pdev)
370 {
371 struct ci_hdrc_imx_data *data;
372 struct ci_hdrc_platform_data pdata = {
373 .name = dev_name(&pdev->dev),
374 .capoffset = DEF_CAPOFFSET,
375 .flags = CI_HDRC_HAS_SHORT_PKT_LIMIT,
376 .notify_event = ci_hdrc_imx_notify_event,
377 };
378 int ret;
379 const struct ci_hdrc_imx_platform_flag *imx_platform_flag;
380 struct device_node *np = pdev->dev.of_node;
381 struct device *dev = &pdev->dev;
382
383 imx_platform_flag = of_device_get_match_data(&pdev->dev);
384
385 data = devm_kzalloc(&pdev->dev, sizeof(*data), GFP_KERNEL);
386 if (!data)
387 return -ENOMEM;
388
389 data->plat_data = imx_platform_flag;
390 pdata.flags |= imx_platform_flag->flags;
391 platform_set_drvdata(pdev, data);
392 data->usbmisc_data = usbmisc_get_init_data(dev);
393 if (IS_ERR(data->usbmisc_data))
394 return PTR_ERR(data->usbmisc_data);
395
396 if ((of_usb_get_phy_mode(dev->of_node) == USBPHY_INTERFACE_MODE_HSIC)
397 && data->usbmisc_data) {
398 pdata.flags |= CI_HDRC_IMX_IS_HSIC;
399 data->usbmisc_data->hsic = 1;
400 data->pinctrl = devm_pinctrl_get(dev);
401 if (PTR_ERR(data->pinctrl) == -ENODEV)
402 data->pinctrl = NULL;
403 else if (IS_ERR(data->pinctrl)) {
404 ret = dev_err_probe(dev, PTR_ERR(data->pinctrl),
405 "pinctrl get failed\n");
406 goto err_put;
407 }
408
409 data->hsic_pad_regulator =
410 devm_regulator_get_optional(dev, "hsic");
411 if (PTR_ERR(data->hsic_pad_regulator) == -ENODEV) {
412 /* no pad regulator is needed */
413 data->hsic_pad_regulator = NULL;
414 } else if (IS_ERR(data->hsic_pad_regulator)) {
415 ret = dev_err_probe(dev, PTR_ERR(data->hsic_pad_regulator),
416 "Get HSIC pad regulator error\n");
417 goto err_put;
418 }
419
420 if (data->hsic_pad_regulator) {
421 ret = regulator_enable(data->hsic_pad_regulator);
422 if (ret) {
423 dev_err(dev,
424 "Failed to enable HSIC pad regulator\n");
425 goto err_put;
426 }
427 ret = devm_add_action_or_reset(dev,
428 ci_hdrc_imx_disable_regulator, data);
429 if (ret) {
430 dev_err(dev,
431 "Failed to add regulator devm action\n");
432 goto err_put;
433 }
434 }
435 }
436
437 /* HSIC pinctrl handling */
438 if (data->pinctrl) {
439 struct pinctrl_state *pinctrl_hsic_idle;
440
441 pinctrl_hsic_idle = pinctrl_lookup_state(data->pinctrl, "idle");
442 if (IS_ERR(pinctrl_hsic_idle)) {
443 dev_err(dev,
444 "pinctrl_hsic_idle lookup failed, err=%ld\n",
445 PTR_ERR(pinctrl_hsic_idle));
446 ret = PTR_ERR(pinctrl_hsic_idle);
447 goto err_put;
448 }
449
450 ret = pinctrl_select_state(data->pinctrl, pinctrl_hsic_idle);
451 if (ret) {
452 dev_err(dev, "hsic_idle select failed, err=%d\n", ret);
453 goto err_put;
454 }
455
456 data->pinctrl_hsic_active = pinctrl_lookup_state(data->pinctrl,
457 "active");
458 if (IS_ERR(data->pinctrl_hsic_active)) {
459 dev_err(dev,
460 "pinctrl_hsic_active lookup failed, err=%ld\n",
461 PTR_ERR(data->pinctrl_hsic_active));
462 ret = PTR_ERR(data->pinctrl_hsic_active);
463 goto err_put;
464 }
465 }
466
467 if (pdata.flags & CI_HDRC_PMQOS)
468 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
469
470 ret = imx_get_clks(dev);
471 if (ret)
472 goto qos_remove_request;
473
474 ret = imx_prepare_enable_clks(dev);
475 if (ret)
476 goto qos_remove_request;
477
478 ret = clk_prepare_enable(data->clk_wakeup);
479 if (ret)
480 goto err_wakeup_clk;
481
482 data->phy = devm_usb_get_phy_by_phandle(dev, "fsl,usbphy", 0);
483 if (IS_ERR(data->phy)) {
484 ret = PTR_ERR(data->phy);
485 if (ret != -ENODEV) {
486 dev_err_probe(dev, ret, "Failed to parse fsl,usbphy\n");
487 goto err_clk;
488 }
489 data->phy = devm_usb_get_phy_by_phandle(dev, "phys", 0);
490 if (IS_ERR(data->phy)) {
491 ret = PTR_ERR(data->phy);
492 if (ret == -ENODEV) {
493 data->phy = NULL;
494 } else {
495 dev_err_probe(dev, ret, "Failed to parse phys\n");
496 goto err_clk;
497 }
498 }
499 }
500
501 pdata.usb_phy = data->phy;
502 if (data->usbmisc_data)
503 data->usbmisc_data->usb_phy = data->phy;
504
505 if ((of_device_is_compatible(np, "fsl,imx53-usb") ||
506 of_device_is_compatible(np, "fsl,imx51-usb")) && pdata.usb_phy &&
507 of_usb_get_phy_mode(np) == USBPHY_INTERFACE_MODE_ULPI) {
508 pdata.flags |= CI_HDRC_OVERRIDE_PHY_CONTROL;
509 data->override_phy_control = true;
510 ret = usb_phy_init(pdata.usb_phy);
511 if (ret) {
512 dev_err(dev, "Failed to init phy\n");
513 goto err_clk;
514 }
515 }
516
517 if (pdata.flags & CI_HDRC_SUPPORTS_RUNTIME_PM)
518 data->supports_runtime_pm = true;
519
520 data->wakeup_irq = platform_get_irq_optional(pdev, 1);
521 if (data->wakeup_irq > 0) {
522 ret = devm_request_threaded_irq(dev, data->wakeup_irq,
523 NULL, ci_wakeup_irq_handler,
524 IRQF_ONESHOT | IRQF_NO_AUTOEN,
525 pdata.name, data);
526 if (ret)
527 goto err_clk;
528 }
529
530 ret = imx_usbmisc_init(data->usbmisc_data);
531 if (ret) {
532 dev_err(dev, "usbmisc init failed, ret=%d\n", ret);
533 goto phy_shutdown;
534 }
535
536 data->ci_pdev = ci_hdrc_add_device(dev,
537 pdev->resource, pdev->num_resources,
538 &pdata);
539 if (IS_ERR(data->ci_pdev)) {
540 ret = PTR_ERR(data->ci_pdev);
541 dev_err_probe(dev, ret, "ci_hdrc_add_device failed\n");
542 goto phy_shutdown;
543 }
544
545 if (data->usbmisc_data) {
546 if (!IS_ERR(pdata.id_extcon.edev) ||
547 of_property_read_bool(np, "usb-role-switch"))
548 data->usbmisc_data->ext_id = 1;
549
550 if (!IS_ERR(pdata.vbus_extcon.edev) ||
551 of_property_read_bool(np, "usb-role-switch"))
552 data->usbmisc_data->ext_vbus = 1;
553
554 /* usbmisc needs to know dr mode to choose wakeup setting */
555 data->usbmisc_data->available_role =
556 ci_hdrc_query_available_role(data->ci_pdev);
557 }
558
559 ret = imx_usbmisc_init_post(data->usbmisc_data);
560 if (ret) {
561 dev_err(dev, "usbmisc post failed, ret=%d\n", ret);
562 goto disable_device;
563 }
564
565 if (data->supports_runtime_pm) {
566 pm_runtime_set_active(dev);
567 pm_runtime_enable(dev);
568 }
569
570 device_set_wakeup_capable(dev, true);
571
572 return 0;
573
574 disable_device:
575 ci_hdrc_remove_device(data->ci_pdev);
576 phy_shutdown:
577 if (data->override_phy_control)
578 usb_phy_shutdown(data->phy);
579 err_clk:
580 clk_disable_unprepare(data->clk_wakeup);
581 err_wakeup_clk:
582 imx_disable_unprepare_clks(dev);
583 qos_remove_request:
584 if (pdata.flags & CI_HDRC_PMQOS)
585 cpu_latency_qos_remove_request(&data->pm_qos_req);
586 data->ci_pdev = NULL;
587 err_put:
588 if (data->usbmisc_data)
589 put_device(data->usbmisc_data->dev);
590 return ret;
591 }
592
ci_hdrc_imx_remove(struct platform_device * pdev)593 static void ci_hdrc_imx_remove(struct platform_device *pdev)
594 {
595 struct ci_hdrc_imx_data *data = platform_get_drvdata(pdev);
596
597 if (data->supports_runtime_pm) {
598 pm_runtime_get_sync(&pdev->dev);
599 pm_runtime_disable(&pdev->dev);
600 pm_runtime_put_noidle(&pdev->dev);
601 }
602 if (data->ci_pdev)
603 ci_hdrc_remove_device(data->ci_pdev);
604 if (data->override_phy_control)
605 usb_phy_shutdown(data->phy);
606 if (data->ci_pdev) {
607 imx_disable_unprepare_clks(&pdev->dev);
608 clk_disable_unprepare(data->clk_wakeup);
609 if (data->plat_data->flags & CI_HDRC_PMQOS)
610 cpu_latency_qos_remove_request(&data->pm_qos_req);
611 }
612 if (data->usbmisc_data)
613 put_device(data->usbmisc_data->dev);
614 }
615
ci_hdrc_imx_shutdown(struct platform_device * pdev)616 static void ci_hdrc_imx_shutdown(struct platform_device *pdev)
617 {
618 ci_hdrc_imx_remove(pdev);
619 }
620
imx_controller_suspend(struct device * dev,pm_message_t msg)621 static int imx_controller_suspend(struct device *dev,
622 pm_message_t msg)
623 {
624 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
625 int ret = 0;
626
627 dev_dbg(dev, "at %s\n", __func__);
628
629 ret = imx_usbmisc_suspend(data->usbmisc_data,
630 PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
631 if (ret) {
632 dev_err(dev,
633 "usbmisc suspend failed, ret=%d\n", ret);
634 return ret;
635 }
636
637 imx_disable_unprepare_clks(dev);
638
639 if (data->wakeup_irq > 0)
640 enable_irq(data->wakeup_irq);
641
642 if (data->plat_data->flags & CI_HDRC_PMQOS)
643 cpu_latency_qos_remove_request(&data->pm_qos_req);
644
645 data->in_lpm = true;
646
647 return 0;
648 }
649
imx_controller_resume(struct device * dev,pm_message_t msg)650 static int imx_controller_resume(struct device *dev,
651 pm_message_t msg)
652 {
653 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
654 int ret = 0;
655
656 dev_dbg(dev, "at %s\n", __func__);
657
658 if (!data->in_lpm) {
659 WARN_ON(1);
660 return 0;
661 }
662
663 if (data->plat_data->flags & CI_HDRC_PMQOS)
664 cpu_latency_qos_add_request(&data->pm_qos_req, 0);
665
666 if (data->wakeup_irq > 0 &&
667 !irqd_irq_disabled(irq_get_irq_data(data->wakeup_irq)))
668 disable_irq_nosync(data->wakeup_irq);
669
670 ret = imx_prepare_enable_clks(dev);
671 if (ret)
672 return ret;
673
674 data->in_lpm = false;
675
676 ret = imx_usbmisc_resume(data->usbmisc_data,
677 PMSG_IS_AUTO(msg) || device_may_wakeup(dev));
678 if (ret) {
679 dev_err(dev, "usbmisc resume failed, ret=%d\n", ret);
680 goto clk_disable;
681 }
682
683 return 0;
684
685 clk_disable:
686 imx_disable_unprepare_clks(dev);
687 return ret;
688 }
689
ci_hdrc_imx_suspend(struct device * dev)690 static int ci_hdrc_imx_suspend(struct device *dev)
691 {
692 int ret;
693
694 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
695
696 if (data->in_lpm)
697 /* The core's suspend doesn't run */
698 return 0;
699
700 ret = imx_controller_suspend(dev, PMSG_SUSPEND);
701 if (ret)
702 return ret;
703
704 pinctrl_pm_select_sleep_state(dev);
705
706 if (data->wakeup_irq > 0 && device_may_wakeup(dev))
707 enable_irq_wake(data->wakeup_irq);
708
709 return ret;
710 }
711
ci_hdrc_imx_resume(struct device * dev)712 static int ci_hdrc_imx_resume(struct device *dev)
713 {
714 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
715 int ret;
716
717 if (data->wakeup_irq > 0 && device_may_wakeup(dev))
718 disable_irq_wake(data->wakeup_irq);
719
720 pinctrl_pm_select_default_state(dev);
721 ret = imx_controller_resume(dev, PMSG_RESUME);
722 if (!ret && data->supports_runtime_pm) {
723 pm_runtime_disable(dev);
724 pm_runtime_set_active(dev);
725 pm_runtime_enable(dev);
726 }
727
728 return ret;
729 }
730
ci_hdrc_imx_runtime_suspend(struct device * dev)731 static int ci_hdrc_imx_runtime_suspend(struct device *dev)
732 {
733 struct ci_hdrc_imx_data *data = dev_get_drvdata(dev);
734
735 if (data->in_lpm) {
736 WARN_ON(1);
737 return 0;
738 }
739
740 return imx_controller_suspend(dev, PMSG_AUTO_SUSPEND);
741 }
742
ci_hdrc_imx_runtime_resume(struct device * dev)743 static int ci_hdrc_imx_runtime_resume(struct device *dev)
744 {
745 return imx_controller_resume(dev, PMSG_AUTO_RESUME);
746 }
747
748 static const struct dev_pm_ops ci_hdrc_imx_pm_ops = {
749 SYSTEM_SLEEP_PM_OPS(ci_hdrc_imx_suspend, ci_hdrc_imx_resume)
750 RUNTIME_PM_OPS(ci_hdrc_imx_runtime_suspend, ci_hdrc_imx_runtime_resume, NULL)
751 };
752 static struct platform_driver ci_hdrc_imx_driver = {
753 .probe = ci_hdrc_imx_probe,
754 .remove = ci_hdrc_imx_remove,
755 .shutdown = ci_hdrc_imx_shutdown,
756 .driver = {
757 .name = "imx_usb",
758 .of_match_table = ci_hdrc_imx_dt_ids,
759 .pm = pm_ptr(&ci_hdrc_imx_pm_ops),
760 },
761 };
762
763 module_platform_driver(ci_hdrc_imx_driver);
764
765 MODULE_ALIAS("platform:imx-usb");
766 MODULE_LICENSE("GPL");
767 MODULE_DESCRIPTION("CI HDRC i.MX USB binding");
768 MODULE_AUTHOR("Marek Vasut <marex@denx.de>");
769 MODULE_AUTHOR("Richard Zhao <richard.zhao@freescale.com>");
770