xref: /openbmc/linux/drivers/usb/dwc3/dwc3-pci.c (revision e2ad626f)
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_TGL			0x9a15
55 #define PCI_DEVICE_ID_AMD_MR			0x163a
56 
57 #define PCI_INTEL_BXT_DSM_GUID		"732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
58 #define PCI_INTEL_BXT_FUNC_PMU_PWR	4
59 #define PCI_INTEL_BXT_STATE_D0		0
60 #define PCI_INTEL_BXT_STATE_D3		3
61 
62 #define GP_RWBAR			1
63 #define GP_RWREG1			0xa0
64 #define GP_RWREG1_ULPI_REFCLK_DISABLE	(1 << 17)
65 
66 /**
67  * struct dwc3_pci - Driver private structure
68  * @dwc3: child dwc3 platform_device
69  * @pci: our link to PCI bus
70  * @guid: _DSM GUID
71  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
72  * @wakeup_work: work for asynchronous resume
73  */
74 struct dwc3_pci {
75 	struct platform_device *dwc3;
76 	struct pci_dev *pci;
77 
78 	guid_t guid;
79 
80 	unsigned int has_dsm_for_pm:1;
81 	struct work_struct wakeup_work;
82 };
83 
84 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
85 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
86 
87 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
88 	{ "reset-gpios", &reset_gpios, 1 },
89 	{ "cs-gpios", &cs_gpios, 1 },
90 	{ },
91 };
92 
93 static struct gpiod_lookup_table platform_bytcr_gpios = {
94 	.dev_id		= "0000:00:16.0",
95 	.table		= {
96 		GPIO_LOOKUP("INT33FC:00", 54, "cs", GPIO_ACTIVE_HIGH),
97 		GPIO_LOOKUP("INT33FC:02", 14, "reset", GPIO_ACTIVE_HIGH),
98 		{}
99 	},
100 };
101 
102 static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci)
103 {
104 	void __iomem	*reg;
105 	u32		value;
106 
107 	reg = pcim_iomap(pci, GP_RWBAR, 0);
108 	if (!reg)
109 		return -ENOMEM;
110 
111 	value = readl(reg + GP_RWREG1);
112 	if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE))
113 		goto unmap; /* ULPI refclk already enabled */
114 
115 	value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE;
116 	writel(value, reg + GP_RWREG1);
117 	/* This comes from the Intel Android x86 tree w/o any explanation */
118 	msleep(100);
119 unmap:
120 	pcim_iounmap(pci, reg);
121 	return 0;
122 }
123 
124 static const struct property_entry dwc3_pci_intel_properties[] = {
125 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
126 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
127 	{}
128 };
129 
130 static const struct property_entry dwc3_pci_intel_phy_charger_detect_properties[] = {
131 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
132 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
133 	PROPERTY_ENTRY_BOOL("linux,phy_charger_detect"),
134 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
135 	{}
136 };
137 
138 static const struct property_entry dwc3_pci_intel_byt_properties[] = {
139 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
140 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
141 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
142 	{}
143 };
144 
145 static const struct property_entry dwc3_pci_mrfld_properties[] = {
146 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
147 	PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
148 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
149 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
150 	PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
151 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
152 	{}
153 };
154 
155 static const struct property_entry dwc3_pci_amd_properties[] = {
156 	PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
157 	PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
158 	PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
159 	PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
160 	PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
161 	PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
162 	PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
163 	PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
164 	PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
165 	PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
166 	PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
167 	/* FIXME these quirks should be removed when AMD NL tapes out */
168 	PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
169 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
170 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
171 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
172 	{}
173 };
174 
175 static const struct property_entry dwc3_pci_mr_properties[] = {
176 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
177 	PROPERTY_ENTRY_BOOL("usb-role-switch"),
178 	PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
179 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
180 	{}
181 };
182 
183 static const struct software_node dwc3_pci_intel_swnode = {
184 	.properties = dwc3_pci_intel_properties,
185 };
186 
187 static const struct software_node dwc3_pci_intel_phy_charger_detect_swnode = {
188 	.properties = dwc3_pci_intel_phy_charger_detect_properties,
189 };
190 
191 static const struct software_node dwc3_pci_intel_byt_swnode = {
192 	.properties = dwc3_pci_intel_byt_properties,
193 };
194 
195 static const struct software_node dwc3_pci_intel_mrfld_swnode = {
196 	.properties = dwc3_pci_mrfld_properties,
197 };
198 
199 static const struct software_node dwc3_pci_amd_swnode = {
200 	.properties = dwc3_pci_amd_properties,
201 };
202 
203 static const struct software_node dwc3_pci_amd_mr_swnode = {
204 	.properties = dwc3_pci_mr_properties,
205 };
206 
207 static int dwc3_pci_quirks(struct dwc3_pci *dwc,
208 			   const struct software_node *swnode)
209 {
210 	struct pci_dev			*pdev = dwc->pci;
211 
212 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
213 		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
214 		    pdev->device == PCI_DEVICE_ID_INTEL_BXT_M ||
215 		    pdev->device == PCI_DEVICE_ID_INTEL_EHL) {
216 			guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
217 			dwc->has_dsm_for_pm = true;
218 		}
219 
220 		if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
221 			struct gpio_desc *gpio;
222 			int ret;
223 
224 			/* On BYT the FW does not always enable the refclock */
225 			ret = dwc3_byt_enable_ulpi_refclock(pdev);
226 			if (ret)
227 				return ret;
228 
229 			ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
230 					acpi_dwc3_byt_gpios);
231 			if (ret)
232 				dev_dbg(&pdev->dev, "failed to add mapping table\n");
233 
234 			/*
235 			 * A lot of BYT devices lack ACPI resource entries for
236 			 * the GPIOs. If the ACPI entry for the GPIO controller
237 			 * is present add a fallback mapping to the reference
238 			 * design GPIOs which all boards seem to use.
239 			 */
240 			if (acpi_dev_present("INT33FC", NULL, -1))
241 				gpiod_add_lookup_table(&platform_bytcr_gpios);
242 
243 			/*
244 			 * These GPIOs will turn on the USB2 PHY. Note that we have to
245 			 * put the gpio descriptors again here because the phy driver
246 			 * might want to grab them, too.
247 			 */
248 			gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
249 			if (IS_ERR(gpio))
250 				return PTR_ERR(gpio);
251 
252 			gpiod_set_value_cansleep(gpio, 1);
253 			gpiod_put(gpio);
254 
255 			gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
256 			if (IS_ERR(gpio))
257 				return PTR_ERR(gpio);
258 
259 			if (gpio) {
260 				gpiod_set_value_cansleep(gpio, 1);
261 				gpiod_put(gpio);
262 				usleep_range(10000, 11000);
263 			}
264 
265 			/*
266 			 * Make the pdev name predictable (only 1 DWC3 on BYT)
267 			 * and patch the phy dev-name into the lookup table so
268 			 * that the phy-driver can get the GPIOs.
269 			 */
270 			dwc->dwc3->id = PLATFORM_DEVID_NONE;
271 			platform_bytcr_gpios.dev_id = "dwc3.ulpi";
272 
273 			/*
274 			 * Some Android tablets with a Crystal Cove PMIC
275 			 * (INT33FD), rely on the TUSB1211 phy for charger
276 			 * detection. These can be identified by them _not_
277 			 * using the standard ACPI battery and ac drivers.
278 			 */
279 			if (acpi_dev_present("INT33FD", "1", 2) &&
280 			    acpi_quirk_skip_acpi_ac_and_battery()) {
281 				dev_info(&pdev->dev, "Using TUSB1211 phy for charger detection\n");
282 				swnode = &dwc3_pci_intel_phy_charger_detect_swnode;
283 			}
284 		}
285 	}
286 
287 	return device_add_software_node(&dwc->dwc3->dev, swnode);
288 }
289 
290 #ifdef CONFIG_PM
291 static void dwc3_pci_resume_work(struct work_struct *work)
292 {
293 	struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
294 	struct platform_device *dwc3 = dwc->dwc3;
295 	int ret;
296 
297 	ret = pm_runtime_get_sync(&dwc3->dev);
298 	if (ret < 0) {
299 		pm_runtime_put_sync_autosuspend(&dwc3->dev);
300 		return;
301 	}
302 
303 	pm_runtime_mark_last_busy(&dwc3->dev);
304 	pm_runtime_put_sync_autosuspend(&dwc3->dev);
305 }
306 #endif
307 
308 static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
309 {
310 	struct dwc3_pci		*dwc;
311 	struct resource		res[2];
312 	int			ret;
313 	struct device		*dev = &pci->dev;
314 
315 	ret = pcim_enable_device(pci);
316 	if (ret) {
317 		dev_err(dev, "failed to enable pci device\n");
318 		return -ENODEV;
319 	}
320 
321 	pci_set_master(pci);
322 
323 	dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
324 	if (!dwc)
325 		return -ENOMEM;
326 
327 	dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
328 	if (!dwc->dwc3)
329 		return -ENOMEM;
330 
331 	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
332 
333 	res[0].start	= pci_resource_start(pci, 0);
334 	res[0].end	= pci_resource_end(pci, 0);
335 	res[0].name	= "dwc_usb3";
336 	res[0].flags	= IORESOURCE_MEM;
337 
338 	res[1].start	= pci->irq;
339 	res[1].name	= "dwc_usb3";
340 	res[1].flags	= IORESOURCE_IRQ;
341 
342 	ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
343 	if (ret) {
344 		dev_err(dev, "couldn't add resources to dwc3 device\n");
345 		goto err;
346 	}
347 
348 	dwc->pci = pci;
349 	dwc->dwc3->dev.parent = dev;
350 	ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
351 
352 	ret = dwc3_pci_quirks(dwc, (void *)id->driver_data);
353 	if (ret)
354 		goto err;
355 
356 	ret = platform_device_add(dwc->dwc3);
357 	if (ret) {
358 		dev_err(dev, "failed to register dwc3 device\n");
359 		goto err;
360 	}
361 
362 	device_init_wakeup(dev, true);
363 	pci_set_drvdata(pci, dwc);
364 	pm_runtime_put(dev);
365 #ifdef CONFIG_PM
366 	INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
367 #endif
368 
369 	return 0;
370 err:
371 	device_remove_software_node(&dwc->dwc3->dev);
372 	platform_device_put(dwc->dwc3);
373 	return ret;
374 }
375 
376 static void dwc3_pci_remove(struct pci_dev *pci)
377 {
378 	struct dwc3_pci		*dwc = pci_get_drvdata(pci);
379 	struct pci_dev		*pdev = dwc->pci;
380 
381 	if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
382 		gpiod_remove_lookup_table(&platform_bytcr_gpios);
383 #ifdef CONFIG_PM
384 	cancel_work_sync(&dwc->wakeup_work);
385 #endif
386 	device_init_wakeup(&pci->dev, false);
387 	pm_runtime_get(&pci->dev);
388 	device_remove_software_node(&dwc->dwc3->dev);
389 	platform_device_unregister(dwc->dwc3);
390 }
391 
392 static const struct pci_device_id dwc3_pci_id_table[] = {
393 	{ PCI_DEVICE_DATA(INTEL, BSW, &dwc3_pci_intel_swnode) },
394 	{ PCI_DEVICE_DATA(INTEL, BYT, &dwc3_pci_intel_byt_swnode) },
395 	{ PCI_DEVICE_DATA(INTEL, MRFLD, &dwc3_pci_intel_mrfld_swnode) },
396 	{ PCI_DEVICE_DATA(INTEL, CMLLP, &dwc3_pci_intel_swnode) },
397 	{ PCI_DEVICE_DATA(INTEL, CMLH, &dwc3_pci_intel_swnode) },
398 	{ PCI_DEVICE_DATA(INTEL, SPTLP, &dwc3_pci_intel_swnode) },
399 	{ PCI_DEVICE_DATA(INTEL, SPTH, &dwc3_pci_intel_swnode) },
400 	{ PCI_DEVICE_DATA(INTEL, BXT, &dwc3_pci_intel_swnode) },
401 	{ PCI_DEVICE_DATA(INTEL, BXT_M, &dwc3_pci_intel_swnode) },
402 	{ PCI_DEVICE_DATA(INTEL, APL, &dwc3_pci_intel_swnode) },
403 	{ PCI_DEVICE_DATA(INTEL, KBP, &dwc3_pci_intel_swnode) },
404 	{ PCI_DEVICE_DATA(INTEL, GLK, &dwc3_pci_intel_swnode) },
405 	{ PCI_DEVICE_DATA(INTEL, CNPLP, &dwc3_pci_intel_swnode) },
406 	{ PCI_DEVICE_DATA(INTEL, CNPH, &dwc3_pci_intel_swnode) },
407 	{ PCI_DEVICE_DATA(INTEL, CNPV, &dwc3_pci_intel_swnode) },
408 	{ PCI_DEVICE_DATA(INTEL, ICLLP, &dwc3_pci_intel_swnode) },
409 	{ PCI_DEVICE_DATA(INTEL, EHL, &dwc3_pci_intel_swnode) },
410 	{ PCI_DEVICE_DATA(INTEL, TGPLP, &dwc3_pci_intel_swnode) },
411 	{ PCI_DEVICE_DATA(INTEL, TGPH, &dwc3_pci_intel_swnode) },
412 	{ PCI_DEVICE_DATA(INTEL, JSP, &dwc3_pci_intel_swnode) },
413 	{ PCI_DEVICE_DATA(INTEL, ADL, &dwc3_pci_intel_swnode) },
414 	{ PCI_DEVICE_DATA(INTEL, ADL_PCH, &dwc3_pci_intel_swnode) },
415 	{ PCI_DEVICE_DATA(INTEL, ADLN, &dwc3_pci_intel_swnode) },
416 	{ PCI_DEVICE_DATA(INTEL, ADLN_PCH, &dwc3_pci_intel_swnode) },
417 	{ PCI_DEVICE_DATA(INTEL, ADLS, &dwc3_pci_intel_swnode) },
418 	{ PCI_DEVICE_DATA(INTEL, RPL, &dwc3_pci_intel_swnode) },
419 	{ PCI_DEVICE_DATA(INTEL, RPLS, &dwc3_pci_intel_swnode) },
420 	{ PCI_DEVICE_DATA(INTEL, MTLM, &dwc3_pci_intel_swnode) },
421 	{ PCI_DEVICE_DATA(INTEL, MTLP, &dwc3_pci_intel_swnode) },
422 	{ PCI_DEVICE_DATA(INTEL, MTL, &dwc3_pci_intel_swnode) },
423 	{ PCI_DEVICE_DATA(INTEL, MTLS, &dwc3_pci_intel_swnode) },
424 	{ PCI_DEVICE_DATA(INTEL, TGL, &dwc3_pci_intel_swnode) },
425 
426 	{ PCI_DEVICE_DATA(AMD, NL_USB, &dwc3_pci_amd_swnode) },
427 	{ PCI_DEVICE_DATA(AMD, MR, &dwc3_pci_amd_mr_swnode) },
428 
429 	{  }	/* Terminating Entry */
430 };
431 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
432 
433 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
434 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
435 {
436 	union acpi_object *obj;
437 	union acpi_object tmp;
438 	union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
439 
440 	if (!dwc->has_dsm_for_pm)
441 		return 0;
442 
443 	tmp.type = ACPI_TYPE_INTEGER;
444 	tmp.integer.value = param;
445 
446 	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
447 			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
448 	if (!obj) {
449 		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
450 		return -EIO;
451 	}
452 
453 	ACPI_FREE(obj);
454 
455 	return 0;
456 }
457 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
458 
459 #ifdef CONFIG_PM
460 static int dwc3_pci_runtime_suspend(struct device *dev)
461 {
462 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
463 
464 	if (device_can_wakeup(dev))
465 		return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
466 
467 	return -EBUSY;
468 }
469 
470 static int dwc3_pci_runtime_resume(struct device *dev)
471 {
472 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
473 	int			ret;
474 
475 	ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
476 	if (ret)
477 		return ret;
478 
479 	queue_work(pm_wq, &dwc->wakeup_work);
480 
481 	return 0;
482 }
483 #endif /* CONFIG_PM */
484 
485 #ifdef CONFIG_PM_SLEEP
486 static int dwc3_pci_suspend(struct device *dev)
487 {
488 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
489 
490 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
491 }
492 
493 static int dwc3_pci_resume(struct device *dev)
494 {
495 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
496 
497 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
498 }
499 #endif /* CONFIG_PM_SLEEP */
500 
501 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
502 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
503 	SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
504 		NULL)
505 };
506 
507 static struct pci_driver dwc3_pci_driver = {
508 	.name		= "dwc3-pci",
509 	.id_table	= dwc3_pci_id_table,
510 	.probe		= dwc3_pci_probe,
511 	.remove		= dwc3_pci_remove,
512 	.driver		= {
513 		.pm	= &dwc3_pci_dev_pm_ops,
514 	}
515 };
516 
517 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
518 MODULE_LICENSE("GPL v2");
519 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
520 
521 module_pci_driver(dwc3_pci_driver);
522