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