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1/**
2 * dwc3-pci.c - PCI Specific glue layer
3 *
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
5 *
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
8 *
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 of
11 * the License as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 */
18
19#include <linux/kernel.h>
20#include <linux/module.h>
21#include <linux/slab.h>
22#include <linux/pci.h>
23#include <linux/pm_runtime.h>
24#include <linux/platform_device.h>
25#include <linux/gpio/consumer.h>
26#include <linux/acpi.h>
27#include <linux/delay.h>
28
29#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
30#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce
31#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf
32#define PCI_DEVICE_ID_INTEL_BYT 0x0f37
33#define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
34#define PCI_DEVICE_ID_INTEL_BSW 0x22b7
35#define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30
36#define PCI_DEVICE_ID_INTEL_SPTH 0xa130
37#define PCI_DEVICE_ID_INTEL_BXT 0x0aaa
38#define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa
39#define PCI_DEVICE_ID_INTEL_APL 0x5aaa
40#define PCI_DEVICE_ID_INTEL_KBP 0xa2b0
41#define PCI_DEVICE_ID_INTEL_GLK 0x31aa
42
43#define PCI_INTEL_BXT_DSM_UUID "732b85d5-b7a7-4a1b-9ba0-4bbd00ffd511"
44#define PCI_INTEL_BXT_FUNC_PMU_PWR 4
45#define PCI_INTEL_BXT_STATE_D0 0
46#define PCI_INTEL_BXT_STATE_D3 3
47
48/**
49 * struct dwc3_pci - Driver private structure
50 * @dwc3: child dwc3 platform_device
51 * @pci: our link to PCI bus
52 * @uuid: _DSM UUID
53 * @has_dsm_for_pm: true for devices which need to run _DSM on runtime PM
54 */
55struct dwc3_pci {
56 struct platform_device *dwc3;
57 struct pci_dev *pci;
58
59 u8 uuid[16];
60
61 unsigned int has_dsm_for_pm:1;
62};
63
64static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
65static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
66
67static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
68 { "reset-gpios", &reset_gpios, 1 },
69 { "cs-gpios", &cs_gpios, 1 },
70 { },
71};
72
73static int dwc3_pci_quirks(struct dwc3_pci *dwc)
74{
75 struct platform_device *dwc3 = dwc->dwc3;
76 struct pci_dev *pdev = dwc->pci;
77
78 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
79 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
80 struct property_entry properties[] = {
81 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
82 PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf),
83 PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"),
84 PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"),
85 PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"),
86 PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"),
87 PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"),
88 PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"),
89 PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"),
90 PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"),
91 PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1),
92 /*
93 * FIXME these quirks should be removed when AMD NL
94 * tapes out
95 */
96 PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"),
97 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
98 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
99 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
100 { },
101 };
102
103 return platform_device_add_properties(dwc3, properties);
104 }
105
106 if (pdev->vendor == PCI_VENDOR_ID_INTEL) {
107 int ret;
108
109 struct property_entry properties[] = {
110 PROPERTY_ENTRY_STRING("dr_mode", "peripheral"),
111 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
112 { }
113 };
114
115 ret = platform_device_add_properties(dwc3, properties);
116 if (ret < 0)
117 return ret;
118
119 if (pdev->device == PCI_DEVICE_ID_INTEL_BXT ||
120 pdev->device == PCI_DEVICE_ID_INTEL_BXT_M) {
121 acpi_str_to_uuid(PCI_INTEL_BXT_DSM_UUID, dwc->uuid);
122 dwc->has_dsm_for_pm = true;
123 }
124
125 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
126 struct gpio_desc *gpio;
127
128 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
129 acpi_dwc3_byt_gpios);
130
131 /*
132 * These GPIOs will turn on the USB2 PHY. Note that we have to
133 * put the gpio descriptors again here because the phy driver
134 * might want to grab them, too.
135 */
136 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
137 if (IS_ERR(gpio))
138 return PTR_ERR(gpio);
139
140 gpiod_set_value_cansleep(gpio, 1);
141 gpiod_put(gpio);
142
143 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
144 if (IS_ERR(gpio))
145 return PTR_ERR(gpio);
146
147 if (gpio) {
148 gpiod_set_value_cansleep(gpio, 1);
149 gpiod_put(gpio);
150 usleep_range(10000, 11000);
151 }
152 }
153 }
154
155 if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
156 (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
157 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
158 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
159 struct property_entry properties[] = {
160 PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"),
161 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"),
162 PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"),
163 PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
164 { },
165 };
166
167 return platform_device_add_properties(dwc3, properties);
168 }
169
170 return 0;
171}
172
173static int dwc3_pci_probe(struct pci_dev *pci,
174 const struct pci_device_id *id)
175{
176 struct dwc3_pci *dwc;
177 struct resource res[2];
178 int ret;
179 struct device *dev = &pci->dev;
180
181 ret = pcim_enable_device(pci);
182 if (ret) {
183 dev_err(dev, "failed to enable pci device\n");
184 return -ENODEV;
185 }
186
187 pci_set_master(pci);
188
189 dwc = devm_kzalloc(dev, sizeof(*dwc), GFP_KERNEL);
190 if (!dwc)
191 return -ENOMEM;
192
193 dwc->dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
194 if (!dwc->dwc3)
195 return -ENOMEM;
196
197 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
198
199 res[0].start = pci_resource_start(pci, 0);
200 res[0].end = pci_resource_end(pci, 0);
201 res[0].name = "dwc_usb3";
202 res[0].flags = IORESOURCE_MEM;
203
204 res[1].start = pci->irq;
205 res[1].name = "dwc_usb3";
206 res[1].flags = IORESOURCE_IRQ;
207
208 ret = platform_device_add_resources(dwc->dwc3, res, ARRAY_SIZE(res));
209 if (ret) {
210 dev_err(dev, "couldn't add resources to dwc3 device\n");
211 return ret;
212 }
213
214 dwc->pci = pci;
215 dwc->dwc3->dev.parent = dev;
216 ACPI_COMPANION_SET(&dwc->dwc3->dev, ACPI_COMPANION(dev));
217
218 ret = dwc3_pci_quirks(dwc);
219 if (ret)
220 goto err;
221
222 ret = platform_device_add(dwc->dwc3);
223 if (ret) {
224 dev_err(dev, "failed to register dwc3 device\n");
225 goto err;
226 }
227
228 device_init_wakeup(dev, true);
229 device_set_run_wake(dev, true);
230 pci_set_drvdata(pci, dwc);
231 pm_runtime_put(dev);
232
233 return 0;
234err:
235 platform_device_put(dwc->dwc3);
236 return ret;
237}
238
239static void dwc3_pci_remove(struct pci_dev *pci)
240{
241 struct dwc3_pci *dwc = pci_get_drvdata(pci);
242
243 device_init_wakeup(&pci->dev, false);
244 pm_runtime_get(&pci->dev);
245 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
246 platform_device_unregister(dwc->dwc3);
247}
248
249static const struct pci_device_id dwc3_pci_id_table[] = {
250 {
251 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
252 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
253 },
254 {
255 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
256 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
257 },
258 {
259 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
260 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
261 },
262 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
263 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
264 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
265 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
266 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
267 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
268 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
269 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
270 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
271 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
272 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
273 { } /* Terminating Entry */
274};
275MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
276
277#if defined(CONFIG_PM) || defined(CONFIG_PM_SLEEP)
278static int dwc3_pci_dsm(struct dwc3_pci *dwc, int param)
279{
280 union acpi_object *obj;
281 union acpi_object tmp;
282 union acpi_object argv4 = ACPI_INIT_DSM_ARGV4(1, &tmp);
283
284 if (!dwc->has_dsm_for_pm)
285 return 0;
286
287 tmp.type = ACPI_TYPE_INTEGER;
288 tmp.integer.value = param;
289
290 obj = acpi_evaluate_dsm(ACPI_HANDLE(&dwc->pci->dev), dwc->uuid,
291 1, PCI_INTEL_BXT_FUNC_PMU_PWR, &argv4);
292 if (!obj) {
293 dev_err(&dwc->pci->dev, "failed to evaluate _DSM\n");
294 return -EIO;
295 }
296
297 ACPI_FREE(obj);
298
299 return 0;
300}
301#endif /* CONFIG_PM || CONFIG_PM_SLEEP */
302
303#ifdef CONFIG_PM
304static int dwc3_pci_runtime_suspend(struct device *dev)
305{
306 struct dwc3_pci *dwc = dev_get_drvdata(dev);
307
308 if (device_run_wake(dev))
309 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
310
311 return -EBUSY;
312}
313
314static int dwc3_pci_runtime_resume(struct device *dev)
315{
316 struct dwc3_pci *dwc = dev_get_drvdata(dev);
317 struct platform_device *dwc3 = dwc->dwc3;
318 int ret;
319
320 ret = dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
321 if (ret)
322 return ret;
323
324 return pm_runtime_get(&dwc3->dev);
325}
326#endif /* CONFIG_PM */
327
328#ifdef CONFIG_PM_SLEEP
329static int dwc3_pci_suspend(struct device *dev)
330{
331 struct dwc3_pci *dwc = dev_get_drvdata(dev);
332
333 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D3);
334}
335
336static int dwc3_pci_resume(struct device *dev)
337{
338 struct dwc3_pci *dwc = dev_get_drvdata(dev);
339
340 return dwc3_pci_dsm(dwc, PCI_INTEL_BXT_STATE_D0);
341}
342#endif /* CONFIG_PM_SLEEP */
343
344static struct dev_pm_ops dwc3_pci_dev_pm_ops = {
345 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_suspend, dwc3_pci_resume)
346 SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume,
347 NULL)
348};
349
350static struct pci_driver dwc3_pci_driver = {
351 .name = "dwc3-pci",
352 .id_table = dwc3_pci_id_table,
353 .probe = dwc3_pci_probe,
354 .remove = dwc3_pci_remove,
355 .driver = {
356 .pm = &dwc3_pci_dev_pm_ops,
357 }
358};
359
360MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
361MODULE_LICENSE("GPL v2");
362MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
363
364module_pci_driver(dwc3_pci_driver);