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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_ADLP 0x51ee
44#define PCI_DEVICE_ID_INTEL_ADLM 0x54ee
45#define PCI_DEVICE_ID_INTEL_ADLS 0x7ae1
46#define PCI_DEVICE_ID_INTEL_TGL 0x9a15
47#define PCI_DEVICE_ID_AMD_MR 0x163a
48
49#define PCI_INTEL_BXT_DSM_GUID "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
50#define PCI_INTEL_BXT_FUNC_PMU_PWR 4
51#define PCI_INTEL_BXT_STATE_D0 0
52#define PCI_INTEL_BXT_STATE_D3 3
53
54#define GP_RWBAR 1
55#define GP_RWREG1 0xa0
56#define GP_RWREG1_ULPI_REFCLK_DISABLE (1 << 17)
57
58
59
60
61
62
63
64
65
66struct dwc3_pci {
67 struct platform_device *dwc3;
68 struct pci_dev *pci;
69
70 guid_t guid;
71
72 unsigned int has_dsm_for_pm:1;
73 struct work_struct wakeup_work;
74};
75
76static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
77static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
78
79static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
80 { "reset-gpios", &reset_gpios, 1 },
81 { "cs-gpios", &cs_gpios, 1 },
82 { },
83};
84
85static struct gpiod_lookup_table platform_bytcr_gpios = {
86 .dev_id = "0000:00:16.0",
87 .table = {
88 GPIO_LOOKUP("INT33FC:00", 54, "reset", GPIO_ACTIVE_HIGH),
89 GPIO_LOOKUP("INT33FC:02", 14, "cs", GPIO_ACTIVE_HIGH),
90 {}
91 },
92};
93
94static int dwc3_byt_enable_ulpi_refclock(struct pci_dev *pci)
95{
96 void __iomem *reg;
97 u32 value;
98
99 reg = pcim_iomap(pci, GP_RWBAR, 0);
100 if (!reg)
101 return -ENOMEM;
102
103 value = readl(reg + GP_RWREG1);
104 if (!(value & GP_RWREG1_ULPI_REFCLK_DISABLE))
105 goto unmap;
106
107 value &= ~GP_RWREG1_ULPI_REFCLK_DISABLE;
108 writel(value, reg + GP_RWREG1);
109
110 msleep(100);
111unmap:
112 pcim_iounmap(pci, reg);
113 return 0;
114}
115
116static const struct property_entry dwc3_pci_intel_properties[] = {
117 PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
118 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
119 {}
120};
121
122static const struct property_entry dwc3_pci_mrfld_properties[] = {
123 PROPERTY_ENTRY_STRING("dr_mode", "otg"),
124 PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
125 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
126 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
127 PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
128 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
129 {}
130};
131
132static const struct property_entry dwc3_pci_amd_properties[] = {
133 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
134 PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
135 PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
136 PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
137 PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
138 PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
139 PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
140 PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
141 PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
142 PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
143 PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
144
145 PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
146 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
147 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
148 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
149 {}
150};
151
152static const struct property_entry dwc3_pci_mr_properties[] = {
153 PROPERTY_ENTRY_STRING("dr_mode", "otg"),
154 PROPERTY_ENTRY_BOOL("usb-role-switch"),
155 PROPERTY_ENTRY_STRING("role-switch-default-mode", "host"),
156 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
157 {}
158};
159
160static const struct software_node dwc3_pci_intel_swnode = {
161 .properties = dwc3_pci_intel_properties,
162};
163
164static const struct software_node dwc3_pci_intel_mrfld_swnode = {
165 .properties = dwc3_pci_mrfld_properties,
166};
167
168static const struct software_node dwc3_pci_amd_swnode = {
169 .properties = dwc3_pci_amd_properties,
170};
171
172static const struct software_node dwc3_pci_amd_mr_swnode = {
173 .properties = dwc3_pci_mr_properties,
174};
175
176static int dwc3_pci_quirks(struct dwc3_pci *dwc)
177{
178 struct pci_dev *pdev = dwc->pci;
179
180 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
181 if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
182 pdev->device == PCI_DEVICE_ID_INTEL_BXT_M ||
183 pdev->device == PCI_DEVICE_ID_INTEL_EHL) {
184 guid_parse(PCI_INTEL_BXT_DSM_GUID, &dwc->guid);
185 dwc->has_dsm_for_pm = true;
186 }
187
188 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
189 struct gpio_desc *gpio;
190 int ret;
191
192
193 ret = dwc3_byt_enable_ulpi_refclock(pdev);
194 if (ret)
195 return ret;
196
197 ret = devm_acpi_dev_add_driver_gpios(&pdev->dev,
198 acpi_dwc3_byt_gpios);
199 if (ret)
200 dev_dbg(&pdev->dev, "failed to add mapping table\n");
201
202
203
204
205
206
207 gpiod_add_lookup_table(&platform_bytcr_gpios);
208
209
210
211
212
213
214 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
215 if (IS_ERR(gpio))
216 return PTR_ERR(gpio);
217
218 gpiod_set_value_cansleep(gpio, 1);
219 gpiod_put(gpio);
220
221 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
222 if (IS_ERR(gpio))
223 return PTR_ERR(gpio);
224
225 if (gpio) {
226 gpiod_set_value_cansleep(gpio, 1);
227 gpiod_put(gpio);
228 usleep_range(10000, 11000);
229 }
230 }
231 }
232
233 return 0;
234}
235
236#ifdef CONFIG_PM
237static void dwc3_pci_resume_work(struct work_struct *work)
238{
239 struct dwc3_pci *dwc = container_of(work, struct dwc3_pci, wakeup_work);
240 struct platform_device *dwc3 = dwc->dwc3;
241 int ret;
242
243 ret = pm_runtime_get_sync(&dwc3->dev);
244 if (ret) {
245 pm_runtime_put_sync_autosuspend(&dwc3->dev);
246 return;
247 }
248
249 pm_runtime_mark_last_busy(&dwc3->dev);
250 pm_runtime_put_sync_autosuspend(&dwc3->dev);
251}
252#endif
253
254static int dwc3_pci_probe(struct pci_dev *pci, const struct pci_device_id *id)
255{
256 struct dwc3_pci *dwc;
257 struct resource res[2];
258 int ret;
259 struct device *dev = &pci->dev;
260
261 ret = pcim_enable_device(pci);
262 if (ret) {
263 dev_err(dev, "failed to enable pci device\n");
264 return -ENODEV;
265 }
266
267 pci_set_master(pci);
268
269 dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
270 if (!dwc)
271 return -ENOMEM;
272
273 dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
274 if (!dwc->dwc3)
275 return -ENOMEM;
276
277 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
278
279 res[0].start = pci_resource_start(pci, 0);
280 res[0].end = pci_resource_end(pci, 0);
281 res[0].name = "dwc_usb3";
282 res[0].flags = IORESOURCE_MEM;
283
284 res[1].start = pci->irq;
285 res[1].name = "dwc_usb3";
286 res[1].flags = IORESOURCE_IRQ;
287
288 ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
289 if (ret) {
290 dev_err(dev, "couldn't add resources to dwc3 device\n");
291 goto err;
292 }
293
294 dwc->pci = pci;
295 dwc->dwc3->dev.parent = dev;
296 ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
297
298 ret = device_add_software_node(&dwc->dwc3->dev, (void *)id->driver_data);
299 if (ret < 0)
300 goto err;
301
302 ret = dwc3_pci_quirks(dwc);
303 if (ret)
304 goto err;
305
306 ret = platform_device_add(dwc->dwc3);
307 if (ret) {
308 dev_err(dev, "failed to register dwc3 device\n");
309 goto err;
310 }
311
312 device_init_wakeup(dev, true);
313 pci_set_drvdata(pci, dwc);
314 pm_runtime_put(dev);
315#ifdef CONFIG_PM
316 INIT_WORK(&dwc->wakeup_work, dwc3_pci_resume_work);
317#endif
318
319 return 0;
320err:
321 device_remove_software_node(&dwc->dwc3->dev);
322 platform_device_put(dwc->dwc3);
323 return ret;
324}
325
326static void dwc3_pci_remove(struct pci_dev *pci)
327{
328 struct dwc3_pci *dwc = pci_get_drvdata(pci);
329 struct pci_dev *pdev = dwc->pci;
330
331 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT)
332 gpiod_remove_lookup_table(&platform_bytcr_gpios);
333#ifdef CONFIG_PM
334 cancel_work_sync(&dwc->wakeup_work);
335#endif
336 device_init_wakeup(&pci->dev, false);
337 pm_runtime_get(&pci->dev);
338 device_remove_software_node(&dwc->dwc3->dev);
339 platform_device_unregister(dwc->dwc3);
340}
341
342static const struct pci_device_id dwc3_pci_id_table[] = {
343 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BSW),
344 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
345
346 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BYT),
347 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
348
349 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_MRFLD),
350 (kernel_ulong_t) &dwc3_pci_intel_mrfld_swnode, },
351
352 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLLP),
353 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
354
355 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CMLH),
356 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
357
358 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTLP),
359 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
360
361 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SPTH),
362 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
363
364 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT),
365 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
366
367 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_BXT_M),
368 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
369
370 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_APL),
371 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
372
373 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_KBP),
374 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
375
376 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_GLK),
377 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
378
379 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPLP),
380 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
381
382 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPH),
383 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
384
385 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_CNPV),
386 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
387
388 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICLLP),
389 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
390
391 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_EHL),
392 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
393
394 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGPLP),
395 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
396
397 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGPH),
398 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
399
400 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_JSP),
401 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
402
403 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLP),
404 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
405
406 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLM),
407 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
408
409 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ADLS),
410 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
411
412 { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_TGL),
413 (kernel_ulong_t) &dwc3_pci_intel_swnode, },
414
415 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_NL_USB),
416 (kernel_ulong_t) &dwc3_pci_amd_swnode, },
417
418 { PCI_VDEVICE(AMD, PCI_DEVICE_ID_AMD_MR),
419 (kernel_ulong_t)&dwc3_pci_amd_mr_swnode, },
420
421 { }
422};
423MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
424
425#if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
426static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
427{
428 union acpi_object *obj;
429 union acpi_object tmp;
430 union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
431
432 if (!dwc->has_dsm_for_pm)
433 return 0;
434
435 tmp.type = ACPI_TYPE_INTEGER;
436 tmp.integer.value = param;
437
438 obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), &dwc->guid,
439 1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
440 if (!obj) {
441 dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
442 return -EIO;
443 }
444
445 ACPI_FREE(obj);
446
447 return 0;
448}
449#endif
450
451#ifdef CONFIG_PM
452static int dwc3_pci_runtime_suspend(struct device *dev)
453{
454 struct dwc3_pci *dwc = dev_get_drvdata(dev);
455
456 if (device_can_wakeup(dev))
457 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
458
459 return -EBUSY;
460}
461
462static int dwc3_pci_runtime_resume(struct device *dev)
463{
464 struct dwc3_pci *dwc = dev_get_drvdata(dev);
465 int ret;
466
467 ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
468 if (ret)
469 return ret;
470
471 queue_work(pm_wq, &dwc->wakeup_work);
472
473 return 0;
474}
475#endif
476
477#ifdef CONFIG_PM_SLEEP
478static int dwc3_pci_suspend(struct device *dev)
479{
480 struct dwc3_pci *dwc = dev_get_drvdata(dev);
481
482 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
483}
484
485static int dwc3_pci_resume(struct device *dev)
486{
487 struct dwc3_pci *dwc = dev_get_drvdata(dev);
488
489 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
490}
491#endif
492
493static const struct dev_pm_ops dwc3_pci_dev_pm_ops = {
494 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
495 SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
496 NULL)
497};
498
499static struct pci_driver dwc3_pci_driver = {
500 .name = "dwc3-pci",
501 .id_table = dwc3_pci_id_table,
502 .probe = dwc3_pci_probe,
503 .remove = dwc3_pci_remove,
504 .driver = {
505 .pm = &dwc3_pci_dev_pm_ops,
506 }
507};
508
509MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
510MODULE_LICENSE("GPL v2");
511MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
512
513module_pci_driver(dwc3_pci_driver);
514
