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/platform_device.h>
24 #include <linux/gpio/consumer.h>
25 #include <linux/acpi.h>
26
27 #include "platform_data.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_APL 0x5aaa
39 #define PCI_DEVICE_ID_INTEL_KBP 0xa2b0
40 #define PCI_DEVICE_ID_INTEL_GLK 0x31aa
41
42 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
43 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
44
45 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
46 { "reset-gpios", &reset_gpios, 1 },
47 { "cs-gpios", &cs_gpios, 1 },
48 { },
49 };
50
dwc3_pci_quirks(struct pci_dev * pdev)51 static int dwc3_pci_quirks(struct pci_dev *pdev)
52 {
53 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
54 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
55 struct dwc3_platform_data pdata;
56
57 memset(&pdata, 0, sizeof(pdata));
58
59 pdata.has_lpm_erratum = true;
60 pdata.lpm_nyet_threshold = 0xf;
61
62 pdata.u2exit_lfps_quirk = true;
63 pdata.u2ss_inp3_quirk = true;
64 pdata.req_p1p2p3_quirk = true;
65 pdata.del_p1p2p3_quirk = true;
66 pdata.del_phy_power_chg_quirk = true;
67 pdata.lfps_filter_quirk = true;
68 pdata.rx_detect_poll_quirk = true;
69
70 pdata.tx_de_emphasis_quirk = true;
71 pdata.tx_de_emphasis = 1;
72
73 /*
74 * FIXME these quirks should be removed when AMD NL
75 * taps out
76 */
77 pdata.disable_scramble_quirk = true;
78 pdata.dis_u3_susphy_quirk = true;
79 pdata.dis_u2_susphy_quirk = true;
80
81 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
82 sizeof(pdata));
83 }
84
85 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
86 pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
87 struct gpio_desc *gpio;
88
89 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
90 acpi_dwc3_byt_gpios);
91
92 /*
93 * These GPIOs will turn on the USB2 PHY. Note that we have to
94 * put the gpio descriptors again here because the phy driver
95 * might want to grab them, too.
96 */
97 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
98 if (IS_ERR(gpio))
99 return PTR_ERR(gpio);
100
101 gpiod_set_value_cansleep(gpio, 1);
102 gpiod_put(gpio);
103
104 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
105 if (IS_ERR(gpio))
106 return PTR_ERR(gpio);
107
108 if (gpio) {
109 gpiod_set_value_cansleep(gpio, 1);
110 gpiod_put(gpio);
111 usleep_range(10000, 11000);
112 }
113 }
114
115 if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
116 (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
117 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
118 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
119
120 struct dwc3_platform_data pdata;
121
122 memset(&pdata, 0, sizeof(pdata));
123 pdata.usb3_lpm_capable = true;
124 pdata.has_lpm_erratum = true;
125 pdata.dis_enblslpm_quirk = true;
126
127 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
128 sizeof(pdata));
129 }
130
131 return 0;
132 }
133
dwc3_pci_probe(struct pci_dev * pci,const struct pci_device_id * id)134 static int dwc3_pci_probe(struct pci_dev *pci,
135 const struct pci_device_id *id)
136 {
137 struct resource res[2];
138 struct platform_device *dwc3;
139 int ret;
140 struct device *dev = &pci->dev;
141
142 ret = pcim_enable_device(pci);
143 if (ret) {
144 dev_err(dev, "failed to enable pci device\n");
145 return -ENODEV;
146 }
147
148 pci_set_master(pci);
149
150 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
151 if (!dwc3) {
152 dev_err(dev, "couldn't allocate dwc3 device\n");
153 return -ENOMEM;
154 }
155
156 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
157
158 res[0].start = pci_resource_start(pci, 0);
159 res[0].end = pci_resource_end(pci, 0);
160 res[0].name = "dwc_usb3";
161 res[0].flags = IORESOURCE_MEM;
162
163 res[1].start = pci->irq;
164 res[1].name = "dwc_usb3";
165 res[1].flags = IORESOURCE_IRQ;
166
167 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
168 if (ret) {
169 dev_err(dev, "couldn't add resources to dwc3 device\n");
170 goto err;
171 }
172
173 pci_set_drvdata(pci, dwc3);
174 ret = dwc3_pci_quirks(pci);
175 if (ret)
176 goto err;
177
178 dwc3->dev.parent = dev;
179 ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
180
181 ret = platform_device_add(dwc3);
182 if (ret) {
183 dev_err(dev, "failed to register dwc3 device\n");
184 goto err;
185 }
186
187 return 0;
188 err:
189 platform_device_put(dwc3);
190 return ret;
191 }
192
dwc3_pci_remove(struct pci_dev * pci)193 static void dwc3_pci_remove(struct pci_dev *pci)
194 {
195 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
196 platform_device_unregister(pci_get_drvdata(pci));
197 }
198
199 static const struct pci_device_id dwc3_pci_id_table[] = {
200 {
201 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
202 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
203 },
204 {
205 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
206 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
207 },
208 {
209 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
210 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
211 },
212 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
213 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
214 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
215 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
216 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
217 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
218 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
219 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), },
220 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_GLK), },
221 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
222 { } /* Terminating Entry */
223 };
224 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
225
226 static struct pci_driver dwc3_pci_driver = {
227 .name = "dwc3-pci",
228 .id_table = dwc3_pci_id_table,
229 .probe = dwc3_pci_probe,
230 .remove = dwc3_pci_remove,
231 };
232
233 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
234 MODULE_LICENSE("GPL v2");
235 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
236
237 module_pci_driver(dwc3_pci_driver);
238