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_INTEL_BYT 0x0f37 31 #define PCI_DEVICE_ID_INTEL_MRFLD 0x119e 32 #define PCI_DEVICE_ID_INTEL_BSW 0x22B7 33 #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 34 #define PCI_DEVICE_ID_INTEL_SPTH 0xa130 35 36 static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; 37 static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; 38 39 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { 40 { "reset-gpios", &reset_gpios, 1 }, 41 { "cs-gpios", &cs_gpios, 1 }, 42 { }, 43 }; 44 45 static int dwc3_pci_quirks(struct pci_dev *pdev) 46 { 47 if (pdev->vendor == PCI_VENDOR_ID_AMD && 48 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) { 49 struct dwc3_platform_data pdata; 50 51 memset(&pdata, 0, sizeof(pdata)); 52 53 pdata.has_lpm_erratum = true; 54 pdata.lpm_nyet_threshold = 0xf; 55 56 pdata.u2exit_lfps_quirk = true; 57 pdata.u2ss_inp3_quirk = true; 58 pdata.req_p1p2p3_quirk = true; 59 pdata.del_p1p2p3_quirk = true; 60 pdata.del_phy_power_chg_quirk = true; 61 pdata.lfps_filter_quirk = true; 62 pdata.rx_detect_poll_quirk = true; 63 64 pdata.tx_de_emphasis_quirk = true; 65 pdata.tx_de_emphasis = 1; 66 67 /* 68 * FIXME these quirks should be removed when AMD NL 69 * taps out 70 */ 71 pdata.disable_scramble_quirk = true; 72 pdata.dis_u3_susphy_quirk = true; 73 pdata.dis_u2_susphy_quirk = true; 74 75 return platform_device_add_data(pci_get_drvdata(pdev), &pdata, 76 sizeof(pdata)); 77 } 78 79 if (pdev->vendor == PCI_VENDOR_ID_INTEL && 80 pdev->device == PCI_DEVICE_ID_INTEL_BYT) { 81 struct gpio_desc *gpio; 82 83 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), 84 acpi_dwc3_byt_gpios); 85 86 /* These GPIOs will turn on the USB2 PHY */ 87 gpio = gpiod_get(&pdev->dev, "cs"); 88 if (!IS_ERR(gpio)) { 89 gpiod_direction_output(gpio, 0); 90 gpiod_set_value_cansleep(gpio, 1); 91 gpiod_put(gpio); 92 } 93 94 gpio = gpiod_get(&pdev->dev, "reset"); 95 if (!IS_ERR(gpio)) { 96 gpiod_direction_output(gpio, 0); 97 gpiod_set_value_cansleep(gpio, 1); 98 gpiod_put(gpio); 99 usleep_range(10000, 11000); 100 } 101 } 102 103 return 0; 104 } 105 106 static int dwc3_pci_probe(struct pci_dev *pci, 107 const struct pci_device_id *id) 108 { 109 struct resource res[2]; 110 struct platform_device *dwc3; 111 int ret; 112 struct device *dev = &pci->dev; 113 114 ret = pcim_enable_device(pci); 115 if (ret) { 116 dev_err(dev, "failed to enable pci device\n"); 117 return -ENODEV; 118 } 119 120 pci_set_master(pci); 121 122 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 123 if (!dwc3) { 124 dev_err(dev, "couldn't allocate dwc3 device\n"); 125 return -ENOMEM; 126 } 127 128 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 129 130 res[0].start = pci_resource_start(pci, 0); 131 res[0].end = pci_resource_end(pci, 0); 132 res[0].name = "dwc_usb3"; 133 res[0].flags = IORESOURCE_MEM; 134 135 res[1].start = pci->irq; 136 res[1].name = "dwc_usb3"; 137 res[1].flags = IORESOURCE_IRQ; 138 139 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 140 if (ret) { 141 dev_err(dev, "couldn't add resources to dwc3 device\n"); 142 return ret; 143 } 144 145 pci_set_drvdata(pci, dwc3); 146 ret = dwc3_pci_quirks(pci); 147 if (ret) 148 goto err; 149 150 dwc3->dev.parent = dev; 151 152 ret = platform_device_add(dwc3); 153 if (ret) { 154 dev_err(dev, "failed to register dwc3 device\n"); 155 goto err; 156 } 157 158 return 0; 159 err: 160 platform_device_put(dwc3); 161 return ret; 162 } 163 164 static void dwc3_pci_remove(struct pci_dev *pci) 165 { 166 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); 167 platform_device_unregister(pci_get_drvdata(pci)); 168 } 169 170 static const struct pci_device_id dwc3_pci_id_table[] = { 171 { 172 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 173 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 174 }, 175 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, 176 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, 177 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, 178 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, 179 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, 180 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, 181 { } /* Terminating Entry */ 182 }; 183 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 184 185 static struct pci_driver dwc3_pci_driver = { 186 .name = "dwc3-pci", 187 .id_table = dwc3_pci_id_table, 188 .probe = dwc3_pci_probe, 189 .remove = dwc3_pci_remove, 190 }; 191 192 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 193 MODULE_LICENSE("GPL v2"); 194 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 195 196 module_pci_driver(dwc3_pci_driver); 197