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Linux/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);
234 

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