xref: /linux/drivers/usb/dwc3/dwc3-pci.c (revision 4b66d18918f8e4d85e51974a9e3ce9abad5c7c3d)
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_WCL			0x4d7e
45 #define PCI_DEVICE_ID_INTEL_ADL			0x460e
46 #define PCI_DEVICE_ID_INTEL_ADL_PCH		0x51ee
47 #define PCI_DEVICE_ID_INTEL_ADLN		0x465e
48 #define PCI_DEVICE_ID_INTEL_ADLN_PCH		0x54ee
49 #define PCI_DEVICE_ID_INTEL_ADLS		0x7ae1
50 #define PCI_DEVICE_ID_INTEL_RPL			0xa70e
51 #define PCI_DEVICE_ID_INTEL_RPLS		0x7a61
52 #define PCI_DEVICE_ID_INTEL_MTLM		0x7eb1
53 #define PCI_DEVICE_ID_INTEL_MTLP		0x7ec1
54 #define PCI_DEVICE_ID_INTEL_MTLS		0x7f6f
55 #define PCI_DEVICE_ID_INTEL_MTL			0x7e7e
56 #define PCI_DEVICE_ID_INTEL_ARLH_PCH		0x777e
57 #define PCI_DEVICE_ID_INTEL_TGL			0x9a15
58 #define PCI_DEVICE_ID_INTEL_PTLH		0xe332
59 #define PCI_DEVICE_ID_INTEL_PTLH_PCH		0xe37e
60 #define PCI_DEVICE_ID_INTEL_PTLU		0xe432
61 #define PCI_DEVICE_ID_INTEL_PTLU_PCH		0xe47e
62 #define PCI_DEVICE_ID_AMD_MR			0x163a
63 
64 #define PCI_INTEL_BXT_DSM_GUID		"732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
65 #define PCI_INTEL_BXT_FUNC_PMU_PWR	4
66 #define PCI_INTEL_BXT_STATE_D0		0
67 #define PCI_INTEL_BXT_STATE_D3		3
68 
69 #define GP_RWBAR			1
70 #define GP_RWREG1			0xa0
71 #define GP_RWREG1_ULPI_REFCLK_DISABLE	(1 << 17)
72 
73 /**
74  * struct dwc3_pci - Driver private structure
75  * @dwc3: child dwc3 platform_device
76  * @pci: our link to PCI bus
77  * @guid: _DSM GUID
78  * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
79  * @wakeup_work: work for asynchronous resume
80  */
81 struct dwc3_pci {
82 	struct platform_device *dwc3;
83 	struct pci_dev *pci;
84 
85 	guid_t guid;
86 
87 	unsigned int has_dsm_for_pm:1;
88 	struct work_struct wakeup_work;
89 };
90 
91 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
92 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
93 
94 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
95 	{ "reset-gpios", &reset_gpios, 1 },
96 	{ "cs-gpios", &cs_gpios, 1 },
97 	{ },
98 };
99 
100 static struct gpiod_lookup_table platform_bytcr_gpios = {
101 	.dev_id		= "0000:00:16.0",
102 	.table		= {
103 		GPIO_LOOKUP("INT33FC:00", 54, "cs", GPIO_ACTIVE_HIGH),
104 		GPIO_LOOKUP("INT33FC:02", 14, "reset", GPIO_ACTIVE_HIGH),
105 		{}
106 	},
107 };
108 
109 static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci)
110 {
111 	void __iomem	*reg;
112 	u32		value;
113 
114 	reg = pcim_iomap(pci, GP_RWBAR, 0);
115 	if (!reg)
116 		return -ENOMEM;
117 
118 	value = readl(reg + GP_RWREG1);
119 	if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE))
120 		goto unmap; /* ULPI refclk already enabled */
121 
122 	value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE;
123 	writel(value, reg + GP_RWREG1);
124 	/* This comes from the Intel Android x86 tree w/o any explanation */
125 	msleep(100);
126 unmap:
127 	pcim_iounmap(pci, reg);
128 	return 0;
129 }
130 
131 static const struct property_entry dwc3_pci_intel_properties[] = {
132 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
133 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
134 	{}
135 };
136 
137 static const struct property_entry dwc3_pci_intel_phy_charger_detect_properties[] = {
138 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
139 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
140 	PROPERTY_ENTRY_BOOL("linux,phy_charger_detect"),
141 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
142 	{}
143 };
144 
145 static const struct property_entry dwc3_pci_intel_byt_properties[] = {
146 	PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
147 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
148 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
149 	{}
150 };
151 
152 /*
153  * Intel Merrifield SoC uses these endpoints for tracing and they cannot
154  * be re-allocated if being used because the side band flow control signals
155  * are hard wired to certain endpoints:
156  * - 1 High BW Bulk IN (IN#1) (RTIT)
157  * - 1 1KB BW Bulk IN (IN#8) + 1 1KB BW Bulk OUT (Run Control) (OUT#8)
158  */
159 static const u8 dwc3_pci_mrfld_reserved_endpoints[] = { 3, 16, 17 };
160 
161 static const struct property_entry dwc3_pci_mrfld_properties[] = {
162 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
163 	PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
164 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
165 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
166 	PROPERTY_ENTRY_U8_ARRAY("snps,reserved-endpoints", dwc3_pci_mrfld_reserved_endpoints),
167 	PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
168 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
169 	{}
170 };
171 
172 static const struct property_entry dwc3_pci_amd_properties[] = {
173 	PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
174 	PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
175 	PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
176 	PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
177 	PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
178 	PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
179 	PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
180 	PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
181 	PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
182 	PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
183 	PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
184 	/* FIXME these quirks should be removed when AMD NL tapes out */
185 	PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
186 	PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
187 	PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
188 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
189 	{}
190 };
191 
192 static const struct property_entry dwc3_pci_mr_properties[] = {
193 	PROPERTY_ENTRY_STRING("dr_mode", "otg"),
194 	PROPERTY_ENTRY_BOOL("usb-role-switch"),
195 	PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
196 	PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
197 	{}
198 };
199 
200 static const struct software_node dwc3_pci_intel_swnode = {
201 	.properties = dwc3_pci_intel_properties,
202 };
203 
204 static const struct software_node dwc3_pci_intel_phy_charger_detect_swnode = {
205 	.properties = dwc3_pci_intel_phy_charger_detect_properties,
206 };
207 
208 static const struct software_node dwc3_pci_intel_byt_swnode = {
209 	.properties = dwc3_pci_intel_byt_properties,
210 };
211 
212 static const struct software_node dwc3_pci_intel_mrfld_swnode = {
213 	.properties = dwc3_pci_mrfld_properties,
214 };
215 
216 static const struct software_node dwc3_pci_amd_swnode = {
217 	.properties = dwc3_pci_amd_properties,
218 };
219 
220 static const struct software_node dwc3_pci_amd_mr_swnode = {
221 	.properties = dwc3_pci_mr_properties,
222 };
223 
224 static int dwc3_pci_quirks(struct dwc3_pci *dwc,
225 			   const struct software_node *swnode)
226 {
227 	struct pci_dev			*pdev = dwc->pci;
228 
229 	if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
230 		if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
231 		    pdev->device == PCI_DEVICE_ID_INTEL_BXT_M ||
232 		    pdev->device == PCI_DEVICE_ID_INTEL_EHL) {
233 			guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
234 			dwc->has_dsm_for_pm = true;
235 		}
236 
237 		if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
238 			struct gpio_desc *gpio;
239 			const char *bios_ver;
240 			int ret;
241 
242 			/* On BYT the FW does not always enable the refclock */
243 			ret = dwc3_byt_enable_ulpi_refclock(pdev);
244 			if (ret)
245 				return ret;
246 
247 			ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
248 					acpi_dwc3_byt_gpios);
249 			if (ret)
250 				dev_dbg(&pdev->dev, "failed to add mapping table\n");
251 
252 			/*
253 			 * A lot of BYT devices lack ACPI resource entries for
254 			 * the GPIOs. If the ACPI entry for the GPIO controller
255 			 * is present add a fallback mapping to the reference
256 			 * design GPIOs which all boards seem to use.
257 			 */
258 			if (acpi_dev_present("INT33FC", NULL, -1))
259 				gpiod_add_lookup_table(&platform_bytcr_gpios);
260 
261 			/*
262 			 * These GPIOs will turn on the USB2 PHY. Note that we have to
263 			 * put the gpio descriptors again here because the phy driver
264 			 * might want to grab them, too.
265 			 */
266 			gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
267 			if (IS_ERR(gpio))
268 				return PTR_ERR(gpio);
269 
270 			gpiod_set_value_cansleep(gpio, 1);
271 			gpiod_put(gpio);
272 
273 			gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
274 			if (IS_ERR(gpio))
275 				return PTR_ERR(gpio);
276 
277 			if (gpio) {
278 				gpiod_set_value_cansleep(gpio, 1);
279 				gpiod_put(gpio);
280 				usleep_range(10000, 11000);
281 			}
282 
283 			/*
284 			 * Make the pdev name predictable (only 1 DWC3 on BYT)
285 			 * and patch the phy dev-name into the lookup table so
286 			 * that the phy-driver can get the GPIOs.
287 			 */
288 			dwc->dwc3->id = PLATFORM_DEVID_NONE;
289 			platform_bytcr_gpios.dev_id = "dwc3.ulpi";
290 
291 			/*
292 			 * Some Android tablets with a Crystal Cove PMIC
293 			 * (INT33FD), rely on the TUSB1211 phy for charger
294 			 * detection. These can be identified by them _not_
295 			 * using the standard ACPI battery and ac drivers.
296 			 */
297 			bios_ver = dmi_get_system_info(DMI_BIOS_VERSION);
298 			if (acpi_dev_present("INT33FD", "1", 2) &&
299 			    acpi_quirk_skip_acpi_ac_and_battery() &&
300 			    /* Lenovo Yoga Tablet 2 Pro 1380 uses LC824206XA instead */
301 			    !(bios_ver &&
302 			      strstarts(bios_ver, "BLADE_21.X64.0005.R00.1504101516"))) {
303 				dev_info(&pdev->dev, "Using TUSB1211 phy for charger detection\n");
304 				swnode = &dwc3_pci_intel_phy_charger_detect_swnode;
305 			}
306 		}
307 	}
308 
309 	return device_add_software_node(&dwc->dwc3->dev, swnode);
310 }
311 
312 #ifdef CONFIG_PM
313 static void dwc3_pci_resume_work(struct work_struct *work)
314 {
315 	struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
316 	struct platform_device *dwc3 = dwc->dwc3;
317 	int ret;
318 
319 	ret = pm_runtime_get_sync(&dwc3->dev);
320 	if (ret < 0) {
321 		pm_runtime_put_sync_autosuspend(&dwc3->dev);
322 		return;
323 	}
324 
325 	pm_runtime_mark_last_busy(&dwc3->dev);
326 	pm_runtime_put_sync_autosuspend(&dwc3->dev);
327 }
328 #endif
329 
330 static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
331 {
332 	struct dwc3_pci		*dwc;
333 	struct resource		res[2];
334 	int			ret;
335 	struct device		*dev = &pci->dev;
336 
337 	ret = pcim_enable_device(pci);
338 	if (ret) {
339 		dev_err(dev, "failed to enable pci device\n");
340 		return -ENODEV;
341 	}
342 
343 	pci_set_master(pci);
344 
345 	dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
346 	if (!dwc)
347 		return -ENOMEM;
348 
349 	dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
350 	if (!dwc->dwc3)
351 		return -ENOMEM;
352 
353 	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
354 
355 	res[0].start	= pci_resource_start(pci, 0);
356 	res[0].end	= pci_resource_end(pci, 0);
357 	res[0].name	= "dwc_usb3";
358 	res[0].flags	= IORESOURCE_MEM;
359 
360 	res[1].start	= pci->irq;
361 	res[1].name	= "dwc_usb3";
362 	res[1].flags	= IORESOURCE_IRQ;
363 
364 	ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
365 	if (ret) {
366 		dev_err(dev, "couldn't add resources to dwc3 device\n");
367 		goto err;
368 	}
369 
370 	dwc->pci = pci;
371 	dwc->dwc3->dev.parent = dev;
372 	ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
373 
374 	ret = dwc3_pci_quirks(dwc, (void *)id->driver_data);
375 	if (ret)
376 		goto err;
377 
378 	ret = platform_device_add(dwc->dwc3);
379 	if (ret) {
380 		dev_err(dev, "failed to register dwc3 device\n");
381 		goto err;
382 	}
383 
384 	device_init_wakeup(dev, true);
385 	pci_set_drvdata(pci, dwc);
386 	pm_runtime_put(dev);
387 #ifdef CONFIG_PM
388 	INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
389 #endif
390 
391 	return 0;
392 err:
393 	device_remove_software_node(&dwc->dwc3->dev);
394 	platform_device_put(dwc->dwc3);
395 	return ret;
396 }
397 
398 static void dwc3_pci_remove(struct pci_dev *pci)
399 {
400 	struct dwc3_pci		*dwc = pci_get_drvdata(pci);
401 	struct pci_dev		*pdev = dwc->pci;
402 
403 	if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
404 		gpiod_remove_lookup_table(&platform_bytcr_gpios);
405 #ifdef CONFIG_PM
406 	cancel_work_sync(&dwc->wakeup_work);
407 #endif
408 	device_init_wakeup(&pci->dev, false);
409 	pm_runtime_get(&pci->dev);
410 	device_remove_software_node(&dwc->dwc3->dev);
411 	platform_device_unregister(dwc->dwc3);
412 }
413 
414 static const struct pci_device_id dwc3_pci_id_table[] = {
415 	{ PCI_DEVICE_DATA(INTEL, BSW, &dwc3_pci_intel_swnode) },
416 	{ PCI_DEVICE_DATA(INTEL, BYT, &dwc3_pci_intel_byt_swnode) },
417 	{ PCI_DEVICE_DATA(INTEL, MRFLD, &dwc3_pci_intel_mrfld_swnode) },
418 	{ PCI_DEVICE_DATA(INTEL, CMLLP, &dwc3_pci_intel_swnode) },
419 	{ PCI_DEVICE_DATA(INTEL, CMLH, &dwc3_pci_intel_swnode) },
420 	{ PCI_DEVICE_DATA(INTEL, SPTLP, &dwc3_pci_intel_swnode) },
421 	{ PCI_DEVICE_DATA(INTEL, SPTH, &dwc3_pci_intel_swnode) },
422 	{ PCI_DEVICE_DATA(INTEL, BXT, &dwc3_pci_intel_swnode) },
423 	{ PCI_DEVICE_DATA(INTEL, BXT_M, &dwc3_pci_intel_swnode) },
424 	{ PCI_DEVICE_DATA(INTEL, APL, &dwc3_pci_intel_swnode) },
425 	{ PCI_DEVICE_DATA(INTEL, KBP, &dwc3_pci_intel_swnode) },
426 	{ PCI_DEVICE_DATA(INTEL, GLK, &dwc3_pci_intel_swnode) },
427 	{ PCI_DEVICE_DATA(INTEL, CNPLP, &dwc3_pci_intel_swnode) },
428 	{ PCI_DEVICE_DATA(INTEL, CNPH, &dwc3_pci_intel_swnode) },
429 	{ PCI_DEVICE_DATA(INTEL, CNPV, &dwc3_pci_intel_swnode) },
430 	{ PCI_DEVICE_DATA(INTEL, ICLLP, &dwc3_pci_intel_swnode) },
431 	{ PCI_DEVICE_DATA(INTEL, EHL, &dwc3_pci_intel_swnode) },
432 	{ PCI_DEVICE_DATA(INTEL, TGPLP, &dwc3_pci_intel_swnode) },
433 	{ PCI_DEVICE_DATA(INTEL, TGPH, &dwc3_pci_intel_swnode) },
434 	{ PCI_DEVICE_DATA(INTEL, JSP, &dwc3_pci_intel_swnode) },
435 	{ PCI_DEVICE_DATA(INTEL, WCL, &dwc3_pci_intel_swnode) },
436 	{ PCI_DEVICE_DATA(INTEL, ADL, &dwc3_pci_intel_swnode) },
437 	{ PCI_DEVICE_DATA(INTEL, ADL_PCH, &dwc3_pci_intel_swnode) },
438 	{ PCI_DEVICE_DATA(INTEL, ADLN, &dwc3_pci_intel_swnode) },
439 	{ PCI_DEVICE_DATA(INTEL, ADLN_PCH, &dwc3_pci_intel_swnode) },
440 	{ PCI_DEVICE_DATA(INTEL, ADLS, &dwc3_pci_intel_swnode) },
441 	{ PCI_DEVICE_DATA(INTEL, RPL, &dwc3_pci_intel_swnode) },
442 	{ PCI_DEVICE_DATA(INTEL, RPLS, &dwc3_pci_intel_swnode) },
443 	{ PCI_DEVICE_DATA(INTEL, MTLM, &dwc3_pci_intel_swnode) },
444 	{ PCI_DEVICE_DATA(INTEL, MTLP, &dwc3_pci_intel_swnode) },
445 	{ PCI_DEVICE_DATA(INTEL, MTL, &dwc3_pci_intel_swnode) },
446 	{ PCI_DEVICE_DATA(INTEL, MTLS, &dwc3_pci_intel_swnode) },
447 	{ PCI_DEVICE_DATA(INTEL, ARLH_PCH, &dwc3_pci_intel_swnode) },
448 	{ PCI_DEVICE_DATA(INTEL, TGL, &dwc3_pci_intel_swnode) },
449 	{ PCI_DEVICE_DATA(INTEL, PTLH, &dwc3_pci_intel_swnode) },
450 	{ PCI_DEVICE_DATA(INTEL, PTLH_PCH, &dwc3_pci_intel_swnode) },
451 	{ PCI_DEVICE_DATA(INTEL, PTLU, &dwc3_pci_intel_swnode) },
452 	{ PCI_DEVICE_DATA(INTEL, PTLU_PCH, &dwc3_pci_intel_swnode) },
453 
454 	{ PCI_DEVICE_DATA(AMD, NL_USB, &dwc3_pci_amd_swnode) },
455 	{ PCI_DEVICE_DATA(AMD, MR, &dwc3_pci_amd_mr_swnode) },
456 
457 	{  }	/* Terminating Entry */
458 };
459 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
460 
461 #if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
462 static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
463 {
464 	union acpi_object *obj;
465 	union acpi_object tmp;
466 	union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
467 
468 	if (!dwc->has_dsm_for_pm)
469 		return 0;
470 
471 	tmp.type = ACPI_TYPE_INTEGER;
472 	tmp.integer.value = param;
473 
474 	obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
475 			1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
476 	if (!obj) {
477 		dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
478 		return -EIO;
479 	}
480 
481 	ACPI_FREE(obj);
482 
483 	return 0;
484 }
485 #endif /* CONFIG_PM || CONFIG_PM_SLEEP */
486 
487 #ifdef CONFIG_PM
488 static int dwc3_pci_runtime_suspend(struct device *dev)
489 {
490 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
491 
492 	if (device_can_wakeup(dev))
493 		return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
494 
495 	return -EBUSY;
496 }
497 
498 static int dwc3_pci_runtime_resume(struct device *dev)
499 {
500 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
501 	int			ret;
502 
503 	ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
504 	if (ret)
505 		return ret;
506 
507 	queue_work(pm_wq, &dwc->wakeup_work);
508 
509 	return 0;
510 }
511 #endif /* CONFIG_PM */
512 
513 #ifdef CONFIG_PM_SLEEP
514 static int dwc3_pci_suspend(struct device *dev)
515 {
516 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
517 
518 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
519 }
520 
521 static int dwc3_pci_resume(struct device *dev)
522 {
523 	struct dwc3_pci		*dwc = dev_get_drvdata(dev);
524 
525 	return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
526 }
527 #endif /* CONFIG_PM_SLEEP */
528 
529 static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
530 	SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
531 	SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
532 		NULL)
533 };
534 
535 static struct pci_driver dwc3_pci_driver = {
536 	.name		= "dwc3-pci",
537 	.id_table	= dwc3_pci_id_table,
538 	.probe		= dwc3_pci_probe,
539 	.remove		= dwc3_pci_remove,
540 	.driver		= {
541 		.pm	= &dwc3_pci_dev_pm_ops,
542 	}
543 };
544 
545 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
546 MODULE_LICENSE("GPL v2");
547 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
548 
549 module_pci_driver(dwc3_pci_driver);
550