xref: /openbmc/linux/drivers/usb/dwc3/dwc3-pci.c (revision 6548d543)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * dwc3-pci.c - PCI Specific glue layer
4  *
5  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
6  *
7  * Authors: Felipe Balbi <balbi@ti.com>,
8  *	    Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9  */
10 
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/slab.h>
14 #include <linux/pci.h>
15 #include <linux/workqueue.h>
16 #include <linux/pm_runtime.h>
17 #include <linux/platform_device.h>
18 #include <linux/gpio/consumer.h>
19 #include <linux/gpio/machine.h>
20 #include <linux/acpi.h>
21 #include <linux/delay.h>
22 
23 #define PCI_DEVICE_ID_INTEL_BYT			0x0f37
24 #define PCI_DEVICE_ID_INTEL_MRFLD		0x119e
25 #define PCI_DEVICE_ID_INTEL_BSW			0x22b7
26 #define PCI_DEVICE_ID_INTEL_SPTLP		0x9d30
27 #define PCI_DEVICE_ID_INTEL_SPTH		0xa130
28 #define PCI_DEVICE_ID_INTEL_BXT			0x0aaa
29 #define PCI_DEVICE_ID_INTEL_BXT_M		0x1aaa
30 #define PCI_DEVICE_ID_INTEL_APL			0x5aaa
31 #define PCI_DEVICE_ID_INTEL_KBP			0xa2b0
32 #define PCI_DEVICE_ID_INTEL_CMLLP		0x02ee
33 #define PCI_DEVICE_ID_INTEL_CMLH		0x06ee
34 #define PCI_DEVICE_ID_INTEL_GLK			0x31aa
35 #define PCI_DEVICE_ID_INTEL_CNPLP		0x9dee
36 #define PCI_DEVICE_ID_INTEL_CNPH		0xa36e
37 #define PCI_DEVICE_ID_INTEL_CNPV		0xa3b0
38 #define PCI_DEVICE_ID_INTEL_ICLLP		0x34ee
39 #define PCI_DEVICE_ID_INTEL_EHL			0x4b7e
40 #define PCI_DEVICE_ID_INTEL_TGPLP		0xa0ee
41 #define PCI_DEVICE_ID_INTEL_TGPH		0x43ee
42 #define PCI_DEVICE_ID_INTEL_JSP			0x4dee
43 #define PCI_DEVICE_ID_INTEL_ADL			0x460e
44 #define PCI_DEVICE_ID_INTEL_ADL_PCH		0x51ee
45 #define PCI_DEVICE_ID_INTEL_ADLN		0x465e
46 #define PCI_DEVICE_ID_INTEL_ADLN_PCH		0x54ee
47 #define PCI_DEVICE_ID_INTEL_ADLS		0x7ae1
48 #define PCI_DEVICE_ID_INTEL_RPL			0xa70e
49 #define PCI_DEVICE_ID_INTEL_RPLS		0x7a61
50 #define PCI_DEVICE_ID_INTEL_MTLM		0x7eb1
51 #define PCI_DEVICE_ID_INTEL_MTLP		0x7ec1
52 #define PCI_DEVICE_ID_INTEL_MTLS		0x7f6f
53 #define PCI_DEVICE_ID_INTEL_MTL			0x7e7e
54 #define PCI_DEVICE_ID_INTEL_ARLH_PCH		0x777e
55 #define PCI_DEVICE_ID_INTEL_TGL			0x9a15
56 #define PCI_DEVICE_ID_AMD_MR			0x163a
57 
58 #define PCI_INTEL_BXT_DSM_GUID		"732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
59 #define PCI_INTEL_BXT_FUNC_PMU_PWR	4
60 #define PCI_INTEL_BXT_STATE_D0		0
61 #define PCI_INTEL_BXT_STATE_D3		3
62 
63 #define GP_RWBAR			1
64 #define GP_RWREG1			0xa0
65 #define GP_RWREG1_ULPI_REFCLK_DISABLE	(1 << 17)
66 
67 /**
68  * struct dwc3_pci - Driver private structure
69  * @dwc3: child dwc3 platform_device
70  * @pci: our link to PCI bus
71  * @guid: _DSM GUID
72  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
73  * @wakeup_work: work for asynchronous resume
74  */
75 struct dwc3_pci {
76 	struct platform_device *dwc3;
77 	struct pci_dev *pci;
78 
79 	guid_t guid;
80 
81 	unsigned int has_dsm_for_pm:1;
82 	struct work_struct wakeup_work;
83 };
84 
85 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
86 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
87 
88 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
89 	{ "reset-gpios", &reset_gpios, 1 },
90 	{ "cs-gpios", &cs_gpios, 1 },
91 	{ },
92 };
93 
94 static struct gpiod_lookup_table platform_bytcr_gpios = {
95 	.dev_id		= "0000:00:16.0",
96 	.table		= {
97 		GPIO_LOOKUP("INT33FC:00", 54, "cs", GPIO_ACTIVE_HIGH),
98 		GPIO_LOOKUP("INT33FC:02", 14, "reset", GPIO_ACTIVE_HIGH),
99 		{}
100 	},
101 };
102 
103 static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci)
104 {
105 	void __iomem	*reg;
106 	u32		value;
107 
108 	reg = pcim_iomap(pci, GP_RWBAR, 0);
109 	if (!reg)
110 		return -ENOMEM;
111 
112 	value = readl(reg + GP_RWREG1);
113 	if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE))
114 		goto unmap; /* ULPI refclk already enabled */
115 
116 	value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE;
117 	writel(value, reg + GP_RWREG1);
118 	/* This comes from the Intel Android x86 tree w/o any explanation */
119 	msleep(100);
120 unmap:
121 	pcim_iounmap(pci, reg);
122 	return 0;
123 }
124 
125 static const struct property_entry dwc3_pci_intel_properties[] = {
126 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
127 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
128 	{}
129 };
130 
131 static const struct property_entry dwc3_pci_intel_phy_charger_detect_properties[] = {
132 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
133 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
134 	PROPERTY_ENTRY_BOOL("linux,phy_charger_detect"),
135 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
136 	{}
137 };
138 
139 static const struct property_entry dwc3_pci_intel_byt_properties[] = {
140 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
141 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
142 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
143 	{}
144 };
145 
146 static const struct property_entry dwc3_pci_mrfld_properties[] = {
147 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
148 	PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
149 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
150 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
151 	PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
152 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
153 	{}
154 };
155 
156 static const struct property_entry dwc3_pci_amd_properties[] = {
157 	PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
158 	PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
159 	PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
160 	PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
161 	PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
162 	PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
163 	PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
164 	PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
165 	PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
166 	PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
167 	PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
168 	/* FIXME these quirks should be removed when AMD NL tapes out */
169 	PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
170 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
171 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
172 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
173 	{}
174 };
175 
176 static const struct property_entry dwc3_pci_mr_properties[] = {
177 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
178 	PROPERTY_ENTRY_BOOL("usb-role-switch"),
179 	PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
180 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
181 	{}
182 };
183 
184 static const struct software_node dwc3_pci_intel_swnode = {
185 	.properties = dwc3_pci_intel_properties,
186 };
187 
188 static const struct software_node dwc3_pci_intel_phy_charger_detect_swnode = {
189 	.properties = dwc3_pci_intel_phy_charger_detect_properties,
190 };
191 
192 static const struct software_node dwc3_pci_intel_byt_swnode = {
193 	.properties = dwc3_pci_intel_byt_properties,
194 };
195 
196 static const struct software_node dwc3_pci_intel_mrfld_swnode = {
197 	.properties = dwc3_pci_mrfld_properties,
198 };
199 
200 static const struct software_node dwc3_pci_amd_swnode = {
201 	.properties = dwc3_pci_amd_properties,
202 };
203 
204 static const struct software_node dwc3_pci_amd_mr_swnode = {
205 	.properties = dwc3_pci_mr_properties,
206 };
207 
208 static int dwc3_pci_quirks(struct dwc3_pci *dwc,
209 			   const struct software_node *swnode)
210 {
211 	struct pci_dev			*pdev = dwc->pci;
212 
213 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
214 		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
215 		    pdev->device == PCI_DEVICE_ID_INTEL_BXT_M ||
216 		    pdev->device == PCI_DEVICE_ID_INTEL_EHL) {
217 			guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
218 			dwc->has_dsm_for_pm = true;
219 		}
220 
221 		if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
222 			struct gpio_desc *gpio;
223 			int ret;
224 
225 			/* On BYT the FW does not always enable the refclock */
226 			ret = dwc3_byt_enable_ulpi_refclock(pdev);
227 			if (ret)
228 				return ret;
229 
230 			ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
231 					acpi_dwc3_byt_gpios);
232 			if (ret)
233 				dev_dbg(&pdev->dev, "failed to add mapping table\n");
234 
235 			/*
236 			 * A lot of BYT devices lack ACPI resource entries for
237 			 * the GPIOs. If the ACPI entry for the GPIO controller
238 			 * is present add a fallback mapping to the reference
239 			 * design GPIOs which all boards seem to use.
240 			 */
241 			if (acpi_dev_present("INT33FC", NULL, -1))
242 				gpiod_add_lookup_table(&platform_bytcr_gpios);
243 
244 			/*
245 			 * These GPIOs will turn on the USB2 PHY. Note that we have to
246 			 * put the gpio descriptors again here because the phy driver
247 			 * might want to grab them, too.
248 			 */
249 			gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
250 			if (IS_ERR(gpio))
251 				return PTR_ERR(gpio);
252 
253 			gpiod_set_value_cansleep(gpio, 1);
254 			gpiod_put(gpio);
255 
256 			gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
257 			if (IS_ERR(gpio))
258 				return PTR_ERR(gpio);
259 
260 			if (gpio) {
261 				gpiod_set_value_cansleep(gpio, 1);
262 				gpiod_put(gpio);
263 				usleep_range(10000, 11000);
264 			}
265 
266 			/*
267 			 * Make the pdev name predictable (only 1 DWC3 on BYT)
268 			 * and patch the phy dev-name into the lookup table so
269 			 * that the phy-driver can get the GPIOs.
270 			 */
271 			dwc->dwc3->id = PLATFORM_DEVID_NONE;
272 			platform_bytcr_gpios.dev_id = "dwc3.ulpi";
273 
274 			/*
275 			 * Some Android tablets with a Crystal Cove PMIC
276 			 * (INT33FD), rely on the TUSB1211 phy for charger
277 			 * detection. These can be identified by them _not_
278 			 * using the standard ACPI battery and ac drivers.
279 			 */
280 			if (acpi_dev_present("INT33FD", "1", 2) &&
281 			    acpi_quirk_skip_acpi_ac_and_battery()) {
282 				dev_info(&pdev->dev, "Using TUSB1211 phy for charger detection\n");
283 				swnode = &dwc3_pci_intel_phy_charger_detect_swnode;
284 			}
285 		}
286 	}
287 
288 	return device_add_software_node(&dwc->dwc3->dev, swnode);
289 }
290 
291 #ifdef CONFIG_PM
292 static void dwc3_pci_resume_work(struct work_struct *work)
293 {
294 	struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
295 	struct platform_device *dwc3 = dwc->dwc3;
296 	int ret;
297 
298 	ret = pm_runtime_get_sync(&dwc3->dev);
299 	if (ret < 0) {
300 		pm_runtime_put_sync_autosuspend(&dwc3->dev);
301 		return;
302 	}
303 
304 	pm_runtime_mark_last_busy(&dwc3->dev);
305 	pm_runtime_put_sync_autosuspend(&dwc3->dev);
306 }
307 #endif
308 
309 static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
310 {
311 	struct dwc3_pci		*dwc;
312 	struct resource		res[2];
313 	int			ret;
314 	struct device		*dev = &pci->dev;
315 
316 	ret = pcim_enable_device(pci);
317 	if (ret) {
318 		dev_err(dev, "failed to enable pci device\n");
319 		return -ENODEV;
320 	}
321 
322 	pci_set_master(pci);
323 
324 	dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
325 	if (!dwc)
326 		return -ENOMEM;
327 
328 	dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
329 	if (!dwc->dwc3)
330 		return -ENOMEM;
331 
332 	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
333 
334 	res[0].start	= pci_resource_start(pci, 0);
335 	res[0].end	= pci_resource_end(pci, 0);
336 	res[0].name	= "dwc_usb3";
337 	res[0].flags	= IORESOURCE_MEM;
338 
339 	res[1].start	= pci->irq;
340 	res[1].name	= "dwc_usb3";
341 	res[1].flags	= IORESOURCE_IRQ;
342 
343 	ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
344 	if (ret) {
345 		dev_err(dev, "couldn't add resources to dwc3 device\n");
346 		goto err;
347 	}
348 
349 	dwc->pci = pci;
350 	dwc->dwc3->dev.parent = dev;
351 	ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
352 
353 	ret = dwc3_pci_quirks(dwc, (void *)id->driver_data);
354 	if (ret)
355 		goto err;
356 
357 	ret = platform_device_add(dwc->dwc3);
358 	if (ret) {
359 		dev_err(dev, "failed to register dwc3 device\n");
360 		goto err;
361 	}
362 
363 	device_init_wakeup(dev, true);
364 	pci_set_drvdata(pci, dwc);
365 	pm_runtime_put(dev);
366 #ifdef CONFIG_PM
367 	INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
368 #endif
369 
370 	return 0;
371 err:
372 	device_remove_software_node(&dwc->dwc3->dev);
373 	platform_device_put(dwc->dwc3);
374 	return ret;
375 }
376 
377 static void dwc3_pci_remove(struct pci_dev *pci)
378 {
379 	struct dwc3_pci		*dwc = pci_get_drvdata(pci);
380 	struct pci_dev		*pdev = dwc->pci;
381 
382 	if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
383 		gpiod_remove_lookup_table(&platform_bytcr_gpios);
384 #ifdef CONFIG_PM
385 	cancel_work_sync(&dwc->wakeup_work);
386 #endif
387 	device_init_wakeup(&pci->dev, false);
388 	pm_runtime_get(&pci->dev);
389 	device_remove_software_node(&dwc->dwc3->dev);
390 	platform_device_unregister(dwc->dwc3);
391 }
392 
393 static const struct pci_device_id dwc3_pci_id_table[] = {
394 	{ PCI_DEVICE_DATA(INTEL, BSW, &dwc3_pci_intel_swnode) },
395 	{ PCI_DEVICE_DATA(INTEL, BYT, &dwc3_pci_intel_byt_swnode) },
396 	{ PCI_DEVICE_DATA(INTEL, MRFLD, &dwc3_pci_intel_mrfld_swnode) },
397 	{ PCI_DEVICE_DATA(INTEL, CMLLP, &dwc3_pci_intel_swnode) },
398 	{ PCI_DEVICE_DATA(INTEL, CMLH, &dwc3_pci_intel_swnode) },
399 	{ PCI_DEVICE_DATA(INTEL, SPTLP, &dwc3_pci_intel_swnode) },
400 	{ PCI_DEVICE_DATA(INTEL, SPTH, &dwc3_pci_intel_swnode) },
401 	{ PCI_DEVICE_DATA(INTEL, BXT, &dwc3_pci_intel_swnode) },
402 	{ PCI_DEVICE_DATA(INTEL, BXT_M, &dwc3_pci_intel_swnode) },
403 	{ PCI_DEVICE_DATA(INTEL, APL, &dwc3_pci_intel_swnode) },
404 	{ PCI_DEVICE_DATA(INTEL, KBP, &dwc3_pci_intel_swnode) },
405 	{ PCI_DEVICE_DATA(INTEL, GLK, &dwc3_pci_intel_swnode) },
406 	{ PCI_DEVICE_DATA(INTEL, CNPLP, &dwc3_pci_intel_swnode) },
407 	{ PCI_DEVICE_DATA(INTEL, CNPH, &dwc3_pci_intel_swnode) },
408 	{ PCI_DEVICE_DATA(INTEL, CNPV, &dwc3_pci_intel_swnode) },
409 	{ PCI_DEVICE_DATA(INTEL, ICLLP, &dwc3_pci_intel_swnode) },
410 	{ PCI_DEVICE_DATA(INTEL, EHL, &dwc3_pci_intel_swnode) },
411 	{ PCI_DEVICE_DATA(INTEL, TGPLP, &dwc3_pci_intel_swnode) },
412 	{ PCI_DEVICE_DATA(INTEL, TGPH, &dwc3_pci_intel_swnode) },
413 	{ PCI_DEVICE_DATA(INTEL, JSP, &dwc3_pci_intel_swnode) },
414 	{ PCI_DEVICE_DATA(INTEL, ADL, &dwc3_pci_intel_swnode) },
415 	{ PCI_DEVICE_DATA(INTEL, ADL_PCH, &dwc3_pci_intel_swnode) },
416 	{ PCI_DEVICE_DATA(INTEL, ADLN, &dwc3_pci_intel_swnode) },
417 	{ PCI_DEVICE_DATA(INTEL, ADLN_PCH, &dwc3_pci_intel_swnode) },
418 	{ PCI_DEVICE_DATA(INTEL, ADLS, &dwc3_pci_intel_swnode) },
419 	{ PCI_DEVICE_DATA(INTEL, RPL, &dwc3_pci_intel_swnode) },
420 	{ PCI_DEVICE_DATA(INTEL, RPLS, &dwc3_pci_intel_swnode) },
421 	{ PCI_DEVICE_DATA(INTEL, MTLM, &dwc3_pci_intel_swnode) },
422 	{ PCI_DEVICE_DATA(INTEL, MTLP, &dwc3_pci_intel_swnode) },
423 	{ PCI_DEVICE_DATA(INTEL, MTL, &dwc3_pci_intel_swnode) },
424 	{ PCI_DEVICE_DATA(INTEL, MTLS, &dwc3_pci_intel_swnode) },
425 	{ PCI_DEVICE_DATA(INTEL, ARLH_PCH, &dwc3_pci_intel_swnode) },
426 	{ PCI_DEVICE_DATA(INTEL, TGL, &dwc3_pci_intel_swnode) },
427 
428 	{ PCI_DEVICE_DATA(AMD, NL_USB, &dwc3_pci_amd_swnode) },
429 	{ PCI_DEVICE_DATA(AMD, MR, &dwc3_pci_amd_mr_swnode) },
430 
431 	{  }	/* Terminating Entry */
432 };
433 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
434 
435 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
436 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
437 {
438 	union acpi_object *obj;
439 	union acpi_object tmp;
440 	union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
441 
442 	if (!dwc->has_dsm_for_pm)
443 		return 0;
444 
445 	tmp.type = ACPI_TYPE_INTEGER;
446 	tmp.integer.value = param;
447 
448 	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
449 			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
450 	if (!obj) {
451 		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
452 		return -EIO;
453 	}
454 
455 	ACPI_FREE(obj);
456 
457 	return 0;
458 }
459 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
460 
461 #ifdef CONFIG_PM
462 static int dwc3_pci_runtime_suspend(struct device *dev)
463 {
464 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
465 
466 	if (device_can_wakeup(dev))
467 		return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
468 
469 	return -EBUSY;
470 }
471 
472 static int dwc3_pci_runtime_resume(struct device *dev)
473 {
474 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
475 	int			ret;
476 
477 	ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
478 	if (ret)
479 		return ret;
480 
481 	queue_work(pm_wq, &dwc->wakeup_work);
482 
483 	return 0;
484 }
485 #endif /* CONFIG_PM */
486 
487 #ifdef CONFIG_PM_SLEEP
488 static int dwc3_pci_suspend(struct device *dev)
489 {
490 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
491 
492 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
493 }
494 
495 static int dwc3_pci_resume(struct device *dev)
496 {
497 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
498 
499 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
500 }
501 #endif /* CONFIG_PM_SLEEP */
502 
503 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
504 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
505 	SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
506 		NULL)
507 };
508 
509 static struct pci_driver dwc3_pci_driver = {
510 	.name		= "dwc3-pci",
511 	.id_table	= dwc3_pci_id_table,
512 	.probe		= dwc3_pci_probe,
513 	.remove		= dwc3_pci_remove,
514 	.driver		= {
515 		.pm	= &dwc3_pci_dev_pm_ops,
516 	}
517 };
518 
519 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
520 MODULE_LICENSE("GPL v2");
521 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
522 
523 module_pci_driver(dwc3_pci_driver);
524