Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git...
[firefly-linux-kernel-4.4.55.git] / drivers / usb / dwc3 / dwc3-pci.c
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
40 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
41 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
42
43 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
44         { "reset-gpios", &reset_gpios, 1 },
45         { "cs-gpios", &cs_gpios, 1 },
46         { },
47 };
48
49 static int dwc3_pci_quirks(struct pci_dev *pdev)
50 {
51         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
52             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
53                 struct dwc3_platform_data pdata;
54
55                 memset(&pdata, 0, sizeof(pdata));
56
57                 pdata.has_lpm_erratum = true;
58                 pdata.lpm_nyet_threshold = 0xf;
59
60                 pdata.u2exit_lfps_quirk = true;
61                 pdata.u2ss_inp3_quirk = true;
62                 pdata.req_p1p2p3_quirk = true;
63                 pdata.del_p1p2p3_quirk = true;
64                 pdata.del_phy_power_chg_quirk = true;
65                 pdata.lfps_filter_quirk = true;
66                 pdata.rx_detect_poll_quirk = true;
67
68                 pdata.tx_de_emphasis_quirk = true;
69                 pdata.tx_de_emphasis = 1;
70
71                 /*
72                  * FIXME these quirks should be removed when AMD NL
73                  * taps out
74                  */
75                 pdata.disable_scramble_quirk = true;
76                 pdata.dis_u3_susphy_quirk = true;
77                 pdata.dis_u2_susphy_quirk = true;
78
79                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
80                                                 sizeof(pdata));
81         }
82
83         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
84             pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
85                 struct gpio_desc *gpio;
86
87                 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
88                                           acpi_dwc3_byt_gpios);
89
90                 /*
91                  * These GPIOs will turn on the USB2 PHY. Note that we have to
92                  * put the gpio descriptors again here because the phy driver
93                  * might want to grab them, too.
94                  */
95                 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
96                 if (IS_ERR(gpio))
97                         return PTR_ERR(gpio);
98
99                 gpiod_set_value_cansleep(gpio, 1);
100                 gpiod_put(gpio);
101
102                 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
103                 if (IS_ERR(gpio))
104                         return PTR_ERR(gpio);
105
106                 if (gpio) {
107                         gpiod_set_value_cansleep(gpio, 1);
108                         gpiod_put(gpio);
109                         usleep_range(10000, 11000);
110                 }
111         }
112
113         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
114             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
115              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
116              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
117
118                 struct dwc3_platform_data pdata;
119
120                 memset(&pdata, 0, sizeof(pdata));
121                 pdata.usb3_lpm_capable = true;
122                 pdata.has_lpm_erratum = true;
123                 pdata.dis_enblslpm_quirk = true;
124
125                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
126                                                 sizeof(pdata));
127         }
128
129         return 0;
130 }
131
132 static int dwc3_pci_probe(struct pci_dev *pci,
133                 const struct pci_device_id *id)
134 {
135         struct resource         res[2];
136         struct platform_device  *dwc3;
137         int                     ret;
138         struct device           *dev = &pci->dev;
139
140         ret = pcim_enable_device(pci);
141         if (ret) {
142                 dev_err(dev, "failed to enable pci device\n");
143                 return -ENODEV;
144         }
145
146         pci_set_master(pci);
147
148         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
149         if (!dwc3) {
150                 dev_err(dev, "couldn't allocate dwc3 device\n");
151                 return -ENOMEM;
152         }
153
154         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
155
156         res[0].start    = pci_resource_start(pci, 0);
157         res[0].end      = pci_resource_end(pci, 0);
158         res[0].name     = "dwc_usb3";
159         res[0].flags    = IORESOURCE_MEM;
160
161         res[1].start    = pci->irq;
162         res[1].name     = "dwc_usb3";
163         res[1].flags    = IORESOURCE_IRQ;
164
165         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
166         if (ret) {
167                 dev_err(dev, "couldn't add resources to dwc3 device\n");
168                 return ret;
169         }
170
171         pci_set_drvdata(pci, dwc3);
172         ret = dwc3_pci_quirks(pci);
173         if (ret)
174                 goto err;
175
176         dwc3->dev.parent = dev;
177         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
178
179         ret = platform_device_add(dwc3);
180         if (ret) {
181                 dev_err(dev, "failed to register dwc3 device\n");
182                 goto err;
183         }
184
185         return 0;
186 err:
187         platform_device_put(dwc3);
188         return ret;
189 }
190
191 static void dwc3_pci_remove(struct pci_dev *pci)
192 {
193         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
194         platform_device_unregister(pci_get_drvdata(pci));
195 }
196
197 static const struct pci_device_id dwc3_pci_id_table[] = {
198         {
199                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
200                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
201         },
202         {
203                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
204                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
205         },
206         {
207                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
208                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
209         },
210         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
211         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
212         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
213         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
214         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
215         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
216         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
217         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
218         {  }    /* Terminating Entry */
219 };
220 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
221
222 static struct pci_driver dwc3_pci_driver = {
223         .name           = "dwc3-pci",
224         .id_table       = dwc3_pci_id_table,
225         .probe          = dwc3_pci_probe,
226         .remove         = dwc3_pci_remove,
227 };
228
229 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
230 MODULE_LICENSE("GPL v2");
231 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
232
233 module_pci_driver(dwc3_pci_driver);