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