xref: /openbmc/linux/drivers/usb/dwc3/dwc3-pci.c (revision 586b4106)
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/dmi.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/slab.h>
15 #include <linux/pci.h>
16 #include <linux/workqueue.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/platform_device.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/gpio/machine.h>
21 #include <linux/acpi.h>
22 #include <linux/delay.h>
23 
24 #define PCI_DEVICE_ID_INTEL_BYT			0x0f37
25 #define PCI_DEVICE_ID_INTEL_MRFLD		0x119e
26 #define PCI_DEVICE_ID_INTEL_BSW			0x22b7
27 #define PCI_DEVICE_ID_INTEL_SPTLP		0x9d30
28 #define PCI_DEVICE_ID_INTEL_SPTH		0xa130
29 #define PCI_DEVICE_ID_INTEL_BXT			0x0aaa
30 #define PCI_DEVICE_ID_INTEL_BXT_M		0x1aaa
31 #define PCI_DEVICE_ID_INTEL_APL			0x5aaa
32 #define PCI_DEVICE_ID_INTEL_KBP			0xa2b0
33 #define PCI_DEVICE_ID_INTEL_CMLLP		0x02ee
34 #define PCI_DEVICE_ID_INTEL_CMLH		0x06ee
35 #define PCI_DEVICE_ID_INTEL_GLK			0x31aa
36 #define PCI_DEVICE_ID_INTEL_CNPLP		0x9dee
37 #define PCI_DEVICE_ID_INTEL_CNPH		0xa36e
38 #define PCI_DEVICE_ID_INTEL_CNPV		0xa3b0
39 #define PCI_DEVICE_ID_INTEL_ICLLP		0x34ee
40 #define PCI_DEVICE_ID_INTEL_EHL			0x4b7e
41 #define PCI_DEVICE_ID_INTEL_TGPLP		0xa0ee
42 #define PCI_DEVICE_ID_INTEL_TGPH		0x43ee
43 #define PCI_DEVICE_ID_INTEL_JSP			0x4dee
44 #define PCI_DEVICE_ID_INTEL_ADL			0x460e
45 #define PCI_DEVICE_ID_INTEL_ADL_PCH		0x51ee
46 #define PCI_DEVICE_ID_INTEL_ADLN		0x465e
47 #define PCI_DEVICE_ID_INTEL_ADLN_PCH		0x54ee
48 #define PCI_DEVICE_ID_INTEL_ADLS		0x7ae1
49 #define PCI_DEVICE_ID_INTEL_RPL			0xa70e
50 #define PCI_DEVICE_ID_INTEL_RPLS		0x7a61
51 #define PCI_DEVICE_ID_INTEL_MTLM		0x7eb1
52 #define PCI_DEVICE_ID_INTEL_MTLP		0x7ec1
53 #define PCI_DEVICE_ID_INTEL_MTLS		0x7f6f
54 #define PCI_DEVICE_ID_INTEL_MTL			0x7e7e
55 #define PCI_DEVICE_ID_INTEL_ARLH_PCH		0x777e
56 #define PCI_DEVICE_ID_INTEL_TGL			0x9a15
57 #define PCI_DEVICE_ID_AMD_MR			0x163a
58 
59 #define PCI_INTEL_BXT_DSM_GUID		"732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
60 #define PCI_INTEL_BXT_FUNC_PMU_PWR	4
61 #define PCI_INTEL_BXT_STATE_D0		0
62 #define PCI_INTEL_BXT_STATE_D3		3
63 
64 #define GP_RWBAR			1
65 #define GP_RWREG1			0xa0
66 #define GP_RWREG1_ULPI_REFCLK_DISABLE	(1 << 17)
67 
68 /**
69  * struct dwc3_pci - Driver private structure
70  * @dwc3: child dwc3 platform_device
71  * @pci: our link to PCI bus
72  * @guid: _DSM GUID
73  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
74  * @wakeup_work: work for asynchronous resume
75  */
76 struct dwc3_pci {
77 	struct platform_device *dwc3;
78 	struct pci_dev *pci;
79 
80 	guid_t guid;
81 
82 	unsigned int has_dsm_for_pm:1;
83 	struct work_struct wakeup_work;
84 };
85 
86 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
87 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
88 
89 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
90 	{ "reset-gpios", &reset_gpios, 1 },
91 	{ "cs-gpios", &cs_gpios, 1 },
92 	{ },
93 };
94 
95 static struct gpiod_lookup_table platform_bytcr_gpios = {
96 	.dev_id		= "0000:00:16.0",
97 	.table		= {
98 		GPIO_LOOKUP("INT33FC:00", 54, "cs", GPIO_ACTIVE_HIGH),
99 		GPIO_LOOKUP("INT33FC:02", 14, "reset", GPIO_ACTIVE_HIGH),
100 		{}
101 	},
102 };
103 
104 static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci)
105 {
106 	void __iomem	*reg;
107 	u32		value;
108 
109 	reg = pcim_iomap(pci, GP_RWBAR, 0);
110 	if (!reg)
111 		return -ENOMEM;
112 
113 	value = readl(reg + GP_RWREG1);
114 	if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE))
115 		goto unmap; /* ULPI refclk already enabled */
116 
117 	value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE;
118 	writel(value, reg + GP_RWREG1);
119 	/* This comes from the Intel Android x86 tree w/o any explanation */
120 	msleep(100);
121 unmap:
122 	pcim_iounmap(pci, reg);
123 	return 0;
124 }
125 
126 static const struct property_entry dwc3_pci_intel_properties[] = {
127 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
128 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
129 	{}
130 };
131 
132 static const struct property_entry dwc3_pci_intel_phy_charger_detect_properties[] = {
133 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
134 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
135 	PROPERTY_ENTRY_BOOL("linux,phy_charger_detect"),
136 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
137 	{}
138 };
139 
140 static const struct property_entry dwc3_pci_intel_byt_properties[] = {
141 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
142 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
143 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
144 	{}
145 };
146 
147 static const struct property_entry dwc3_pci_mrfld_properties[] = {
148 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
149 	PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
150 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
151 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
152 	PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
153 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
154 	{}
155 };
156 
157 static const struct property_entry dwc3_pci_amd_properties[] = {
158 	PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
159 	PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
160 	PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
161 	PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
162 	PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
163 	PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
164 	PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
165 	PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
166 	PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
167 	PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
168 	PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
169 	/* FIXME these quirks should be removed when AMD NL tapes out */
170 	PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
171 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
172 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
173 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
174 	{}
175 };
176 
177 static const struct property_entry dwc3_pci_mr_properties[] = {
178 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
179 	PROPERTY_ENTRY_BOOL("usb-role-switch"),
180 	PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
181 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
182 	{}
183 };
184 
185 static const struct software_node dwc3_pci_intel_swnode = {
186 	.properties = dwc3_pci_intel_properties,
187 };
188 
189 static const struct software_node dwc3_pci_intel_phy_charger_detect_swnode = {
190 	.properties = dwc3_pci_intel_phy_charger_detect_properties,
191 };
192 
193 static const struct software_node dwc3_pci_intel_byt_swnode = {
194 	.properties = dwc3_pci_intel_byt_properties,
195 };
196 
197 static const struct software_node dwc3_pci_intel_mrfld_swnode = {
198 	.properties = dwc3_pci_mrfld_properties,
199 };
200 
201 static const struct software_node dwc3_pci_amd_swnode = {
202 	.properties = dwc3_pci_amd_properties,
203 };
204 
205 static const struct software_node dwc3_pci_amd_mr_swnode = {
206 	.properties = dwc3_pci_mr_properties,
207 };
208 
209 static int dwc3_pci_quirks(struct dwc3_pci *dwc,
210 			   const struct software_node *swnode)
211 {
212 	struct pci_dev			*pdev = dwc->pci;
213 
214 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
215 		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
216 		    pdev->device == PCI_DEVICE_ID_INTEL_BXT_M ||
217 		    pdev->device == PCI_DEVICE_ID_INTEL_EHL) {
218 			guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
219 			dwc->has_dsm_for_pm = true;
220 		}
221 
222 		if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
223 			struct gpio_desc *gpio;
224 			const char *bios_ver;
225 			int ret;
226 
227 			/* On BYT the FW does not always enable the refclock */
228 			ret = dwc3_byt_enable_ulpi_refclock(pdev);
229 			if (ret)
230 				return ret;
231 
232 			ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
233 					acpi_dwc3_byt_gpios);
234 			if (ret)
235 				dev_dbg(&pdev->dev, "failed to add mapping table\n");
236 
237 			/*
238 			 * A lot of BYT devices lack ACPI resource entries for
239 			 * the GPIOs. If the ACPI entry for the GPIO controller
240 			 * is present add a fallback mapping to the reference
241 			 * design GPIOs which all boards seem to use.
242 			 */
243 			if (acpi_dev_present("INT33FC", NULL, -1))
244 				gpiod_add_lookup_table(&platform_bytcr_gpios);
245 
246 			/*
247 			 * These GPIOs will turn on the USB2 PHY. Note that we have to
248 			 * put the gpio descriptors again here because the phy driver
249 			 * might want to grab them, too.
250 			 */
251 			gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
252 			if (IS_ERR(gpio))
253 				return PTR_ERR(gpio);
254 
255 			gpiod_set_value_cansleep(gpio, 1);
256 			gpiod_put(gpio);
257 
258 			gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
259 			if (IS_ERR(gpio))
260 				return PTR_ERR(gpio);
261 
262 			if (gpio) {
263 				gpiod_set_value_cansleep(gpio, 1);
264 				gpiod_put(gpio);
265 				usleep_range(10000, 11000);
266 			}
267 
268 			/*
269 			 * Make the pdev name predictable (only 1 DWC3 on BYT)
270 			 * and patch the phy dev-name into the lookup table so
271 			 * that the phy-driver can get the GPIOs.
272 			 */
273 			dwc->dwc3->id = PLATFORM_DEVID_NONE;
274 			platform_bytcr_gpios.dev_id = "dwc3.ulpi";
275 
276 			/*
277 			 * Some Android tablets with a Crystal Cove PMIC
278 			 * (INT33FD), rely on the TUSB1211 phy for charger
279 			 * detection. These can be identified by them _not_
280 			 * using the standard ACPI battery and ac drivers.
281 			 */
282 			bios_ver = dmi_get_system_info(DMI_BIOS_VERSION);
283 			if (acpi_dev_present("INT33FD", "1", 2) &&
284 			    acpi_quirk_skip_acpi_ac_and_battery() &&
285 			    /* Lenovo Yoga Tablet 2 Pro 1380 uses LC824206XA instead */
286 			    !(bios_ver &&
287 			      strstarts(bios_ver, "BLADE_21.X64.0005.R00.1504101516"))) {
288 				dev_info(&pdev->dev, "Using TUSB1211 phy for charger detection\n");
289 				swnode = &dwc3_pci_intel_phy_charger_detect_swnode;
290 			}
291 		}
292 	}
293 
294 	return device_add_software_node(&dwc->dwc3->dev, swnode);
295 }
296 
297 #ifdef CONFIG_PM
298 static void dwc3_pci_resume_work(struct work_struct *work)
299 {
300 	struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
301 	struct platform_device *dwc3 = dwc->dwc3;
302 	int ret;
303 
304 	ret = pm_runtime_get_sync(&dwc3->dev);
305 	if (ret < 0) {
306 		pm_runtime_put_sync_autosuspend(&dwc3->dev);
307 		return;
308 	}
309 
310 	pm_runtime_mark_last_busy(&dwc3->dev);
311 	pm_runtime_put_sync_autosuspend(&dwc3->dev);
312 }
313 #endif
314 
315 static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
316 {
317 	struct dwc3_pci		*dwc;
318 	struct resource		res[2];
319 	int			ret;
320 	struct device		*dev = &pci->dev;
321 
322 	ret = pcim_enable_device(pci);
323 	if (ret) {
324 		dev_err(dev, "failed to enable pci device\n");
325 		return -ENODEV;
326 	}
327 
328 	pci_set_master(pci);
329 
330 	dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
331 	if (!dwc)
332 		return -ENOMEM;
333 
334 	dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
335 	if (!dwc->dwc3)
336 		return -ENOMEM;
337 
338 	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
339 
340 	res[0].start	= pci_resource_start(pci, 0);
341 	res[0].end	= pci_resource_end(pci, 0);
342 	res[0].name	= "dwc_usb3";
343 	res[0].flags	= IORESOURCE_MEM;
344 
345 	res[1].start	= pci->irq;
346 	res[1].name	= "dwc_usb3";
347 	res[1].flags	= IORESOURCE_IRQ;
348 
349 	ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
350 	if (ret) {
351 		dev_err(dev, "couldn't add resources to dwc3 device\n");
352 		goto err;
353 	}
354 
355 	dwc->pci = pci;
356 	dwc->dwc3->dev.parent = dev;
357 	ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
358 
359 	ret = dwc3_pci_quirks(dwc, (void *)id->driver_data);
360 	if (ret)
361 		goto err;
362 
363 	ret = platform_device_add(dwc->dwc3);
364 	if (ret) {
365 		dev_err(dev, "failed to register dwc3 device\n");
366 		goto err;
367 	}
368 
369 	device_init_wakeup(dev, true);
370 	pci_set_drvdata(pci, dwc);
371 	pm_runtime_put(dev);
372 #ifdef CONFIG_PM
373 	INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
374 #endif
375 
376 	return 0;
377 err:
378 	device_remove_software_node(&dwc->dwc3->dev);
379 	platform_device_put(dwc->dwc3);
380 	return ret;
381 }
382 
383 static void dwc3_pci_remove(struct pci_dev *pci)
384 {
385 	struct dwc3_pci		*dwc = pci_get_drvdata(pci);
386 	struct pci_dev		*pdev = dwc->pci;
387 
388 	if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
389 		gpiod_remove_lookup_table(&platform_bytcr_gpios);
390 #ifdef CONFIG_PM
391 	cancel_work_sync(&dwc->wakeup_work);
392 #endif
393 	device_init_wakeup(&pci->dev, false);
394 	pm_runtime_get(&pci->dev);
395 	device_remove_software_node(&dwc->dwc3->dev);
396 	platform_device_unregister(dwc->dwc3);
397 }
398 
399 static const struct pci_device_id dwc3_pci_id_table[] = {
400 	{ PCI_DEVICE_DATA(INTEL, BSW, &dwc3_pci_intel_swnode) },
401 	{ PCI_DEVICE_DATA(INTEL, BYT, &dwc3_pci_intel_byt_swnode) },
402 	{ PCI_DEVICE_DATA(INTEL, MRFLD, &dwc3_pci_intel_mrfld_swnode) },
403 	{ PCI_DEVICE_DATA(INTEL, CMLLP, &dwc3_pci_intel_swnode) },
404 	{ PCI_DEVICE_DATA(INTEL, CMLH, &dwc3_pci_intel_swnode) },
405 	{ PCI_DEVICE_DATA(INTEL, SPTLP, &dwc3_pci_intel_swnode) },
406 	{ PCI_DEVICE_DATA(INTEL, SPTH, &dwc3_pci_intel_swnode) },
407 	{ PCI_DEVICE_DATA(INTEL, BXT, &dwc3_pci_intel_swnode) },
408 	{ PCI_DEVICE_DATA(INTEL, BXT_M, &dwc3_pci_intel_swnode) },
409 	{ PCI_DEVICE_DATA(INTEL, APL, &dwc3_pci_intel_swnode) },
410 	{ PCI_DEVICE_DATA(INTEL, KBP, &dwc3_pci_intel_swnode) },
411 	{ PCI_DEVICE_DATA(INTEL, GLK, &dwc3_pci_intel_swnode) },
412 	{ PCI_DEVICE_DATA(INTEL, CNPLP, &dwc3_pci_intel_swnode) },
413 	{ PCI_DEVICE_DATA(INTEL, CNPH, &dwc3_pci_intel_swnode) },
414 	{ PCI_DEVICE_DATA(INTEL, CNPV, &dwc3_pci_intel_swnode) },
415 	{ PCI_DEVICE_DATA(INTEL, ICLLP, &dwc3_pci_intel_swnode) },
416 	{ PCI_DEVICE_DATA(INTEL, EHL, &dwc3_pci_intel_swnode) },
417 	{ PCI_DEVICE_DATA(INTEL, TGPLP, &dwc3_pci_intel_swnode) },
418 	{ PCI_DEVICE_DATA(INTEL, TGPH, &dwc3_pci_intel_swnode) },
419 	{ PCI_DEVICE_DATA(INTEL, JSP, &dwc3_pci_intel_swnode) },
420 	{ PCI_DEVICE_DATA(INTEL, ADL, &dwc3_pci_intel_swnode) },
421 	{ PCI_DEVICE_DATA(INTEL, ADL_PCH, &dwc3_pci_intel_swnode) },
422 	{ PCI_DEVICE_DATA(INTEL, ADLN, &dwc3_pci_intel_swnode) },
423 	{ PCI_DEVICE_DATA(INTEL, ADLN_PCH, &dwc3_pci_intel_swnode) },
424 	{ PCI_DEVICE_DATA(INTEL, ADLS, &dwc3_pci_intel_swnode) },
425 	{ PCI_DEVICE_DATA(INTEL, RPL, &dwc3_pci_intel_swnode) },
426 	{ PCI_DEVICE_DATA(INTEL, RPLS, &dwc3_pci_intel_swnode) },
427 	{ PCI_DEVICE_DATA(INTEL, MTLM, &dwc3_pci_intel_swnode) },
428 	{ PCI_DEVICE_DATA(INTEL, MTLP, &dwc3_pci_intel_swnode) },
429 	{ PCI_DEVICE_DATA(INTEL, MTL, &dwc3_pci_intel_swnode) },
430 	{ PCI_DEVICE_DATA(INTEL, MTLS, &dwc3_pci_intel_swnode) },
431 	{ PCI_DEVICE_DATA(INTEL, ARLH_PCH, &dwc3_pci_intel_swnode) },
432 	{ PCI_DEVICE_DATA(INTEL, TGL, &dwc3_pci_intel_swnode) },
433 
434 	{ PCI_DEVICE_DATA(AMD, NL_USB, &dwc3_pci_amd_swnode) },
435 	{ PCI_DEVICE_DATA(AMD, MR, &dwc3_pci_amd_mr_swnode) },
436 
437 	{  }	/* Terminating Entry */
438 };
439 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
440 
441 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
442 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
443 {
444 	union acpi_object *obj;
445 	union acpi_object tmp;
446 	union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
447 
448 	if (!dwc->has_dsm_for_pm)
449 		return 0;
450 
451 	tmp.type = ACPI_TYPE_INTEGER;
452 	tmp.integer.value = param;
453 
454 	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
455 			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
456 	if (!obj) {
457 		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
458 		return -EIO;
459 	}
460 
461 	ACPI_FREE(obj);
462 
463 	return 0;
464 }
465 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
466 
467 #ifdef CONFIG_PM
468 static int dwc3_pci_runtime_suspend(struct device *dev)
469 {
470 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
471 
472 	if (device_can_wakeup(dev))
473 		return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
474 
475 	return -EBUSY;
476 }
477 
478 static int dwc3_pci_runtime_resume(struct device *dev)
479 {
480 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
481 	int			ret;
482 
483 	ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
484 	if (ret)
485 		return ret;
486 
487 	queue_work(pm_wq, &dwc->wakeup_work);
488 
489 	return 0;
490 }
491 #endif /* CONFIG_PM */
492 
493 #ifdef CONFIG_PM_SLEEP
494 static int dwc3_pci_suspend(struct device *dev)
495 {
496 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
497 
498 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
499 }
500 
501 static int dwc3_pci_resume(struct device *dev)
502 {
503 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
504 
505 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
506 }
507 #endif /* CONFIG_PM_SLEEP */
508 
509 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
510 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
511 	SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
512 		NULL)
513 };
514 
515 static struct pci_driver dwc3_pci_driver = {
516 	.name		= "dwc3-pci",
517 	.id_table	= dwc3_pci_id_table,
518 	.probe		= dwc3_pci_probe,
519 	.remove		= dwc3_pci_remove,
520 	.driver		= {
521 		.pm	= &dwc3_pci_dev_pm_ops,
522 	}
523 };
524 
525 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
526 MODULE_LICENSE("GPL v2");
527 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
528 
529 module_pci_driver(dwc3_pci_driver);
530