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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_BXT_M               0x1aaa
 39 #define PCI_DEVICE_ID_INTEL_APL                 0x5aaa
 40 
 41 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
 42 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
 43 
 44 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
 45         { "reset-gpios", &reset_gpios, 1 },
 46         { "cs-gpios", &cs_gpios, 1 },
 47         { },
 48 };
 49 
 50 static int dwc3_pci_quirks(struct pci_dev *pdev)
 51 {
 52         if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 53             pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
 54                 struct dwc3_platform_data pdata;
 55 
 56                 memset(&pdata, 0, sizeof(pdata));
 57 
 58                 pdata.has_lpm_erratum = true;
 59                 pdata.lpm_nyet_threshold = 0xf;
 60 
 61                 pdata.u2exit_lfps_quirk = true;
 62                 pdata.u2ss_inp3_quirk = true;
 63                 pdata.req_p1p2p3_quirk = true;
 64                 pdata.del_p1p2p3_quirk = true;
 65                 pdata.del_phy_power_chg_quirk = true;
 66                 pdata.lfps_filter_quirk = true;
 67                 pdata.rx_detect_poll_quirk = true;
 68 
 69                 pdata.tx_de_emphasis_quirk = true;
 70                 pdata.tx_de_emphasis = 1;
 71 
 72                 /*
 73                  * FIXME these quirks should be removed when AMD NL
 74                  * taps out
 75                  */
 76                 pdata.disable_scramble_quirk = true;
 77                 pdata.dis_u3_susphy_quirk = true;
 78                 pdata.dis_u2_susphy_quirk = true;
 79 
 80                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
 81                                                 sizeof(pdata));
 82         }
 83 
 84         if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 85             pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
 86                 struct gpio_desc *gpio;
 87 
 88                 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
 89                                           acpi_dwc3_byt_gpios);
 90 
 91                 /*
 92                  * These GPIOs will turn on the USB2 PHY. Note that we have to
 93                  * put the gpio descriptors again here because the phy driver
 94                  * might want to grab them, too.
 95                  */
 96                 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 97                 if (IS_ERR(gpio))
 98                         return PTR_ERR(gpio);
 99 
100                 gpiod_set_value_cansleep(gpio, 1);
101                 gpiod_put(gpio);
102 
103                 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
104                 if (IS_ERR(gpio))
105                         return PTR_ERR(gpio);
106 
107                 if (gpio) {
108                         gpiod_set_value_cansleep(gpio, 1);
109                         gpiod_put(gpio);
110                         usleep_range(10000, 11000);
111                 }
112         }
113 
114         if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
115             (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
116              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
117              pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
118 
119                 struct dwc3_platform_data pdata;
120 
121                 memset(&pdata, 0, sizeof(pdata));
122                 pdata.usb3_lpm_capable = true;
123                 pdata.has_lpm_erratum = true;
124                 pdata.dis_enblslpm_quirk = true;
125 
126                 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
127                                                 sizeof(pdata));
128         }
129 
130         return 0;
131 }
132 
133 static int dwc3_pci_probe(struct pci_dev *pci,
134                 const struct pci_device_id *id)
135 {
136         struct resource         res[2];
137         struct platform_device  *dwc3;
138         int                     ret;
139         struct device           *dev = &pci->dev;
140 
141         ret = pcim_enable_device(pci);
142         if (ret) {
143                 dev_err(dev, "failed to enable pci device\n");
144                 return -ENODEV;
145         }
146 
147         pci_set_master(pci);
148 
149         dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
150         if (!dwc3) {
151                 dev_err(dev, "couldn't allocate dwc3 device\n");
152                 return -ENOMEM;
153         }
154 
155         memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
156 
157         res[0].start    = pci_resource_start(pci, 0);
158         res[0].end      = pci_resource_end(pci, 0);
159         res[0].name     = "dwc_usb3";
160         res[0].flags    = IORESOURCE_MEM;
161 
162         res[1].start    = pci->irq;
163         res[1].name     = "dwc_usb3";
164         res[1].flags    = IORESOURCE_IRQ;
165 
166         ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
167         if (ret) {
168                 dev_err(dev, "couldn't add resources to dwc3 device\n");
169                 return ret;
170         }
171 
172         pci_set_drvdata(pci, dwc3);
173         ret = dwc3_pci_quirks(pci);
174         if (ret)
175                 goto err;
176 
177         dwc3->dev.parent = dev;
178         ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
179 
180         ret = platform_device_add(dwc3);
181         if (ret) {
182                 dev_err(dev, "failed to register dwc3 device\n");
183                 goto err;
184         }
185 
186         return 0;
187 err:
188         platform_device_put(dwc3);
189         return ret;
190 }
191 
192 static void dwc3_pci_remove(struct pci_dev *pci)
193 {
194         acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
195         platform_device_unregister(pci_get_drvdata(pci));
196 }
197 
198 static const struct pci_device_id dwc3_pci_id_table[] = {
199         {
200                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
201                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
202         },
203         {
204                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
205                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
206         },
207         {
208                 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
209                                 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
210         },
211         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
212         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
213         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
214         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
215         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
216         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
217         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
218         { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
219         { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
220         {  }    /* Terminating Entry */
221 };
222 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
223 
224 static struct pci_driver dwc3_pci_driver = {
225         .name           = "dwc3-pci",
226         .id_table       = dwc3_pci_id_table,
227         .probe          = dwc3_pci_probe,
228         .remove         = dwc3_pci_remove,
229 };
230 
231 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
232 MODULE_LICENSE("GPL v2");
233 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
234 
235 module_pci_driver(dwc3_pci_driver);
236 

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