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 /* 87 * These GPIOs will turn on the USB2 PHY. Note that we have to 88 * put the gpio descriptors again here because the phy driver 89 * might want to grab them, too. 90 */ 91 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW); 92 if (IS_ERR(gpio)) 93 return PTR_ERR(gpio); 94 95 gpiod_set_value_cansleep(gpio, 1); 96 gpiod_put(gpio); 97 98 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW); 99 if (IS_ERR(gpio)) 100 return PTR_ERR(gpio); 101 102 if (gpio) { 103 gpiod_set_value_cansleep(gpio, 1); 104 gpiod_put(gpio); 105 usleep_range(10000, 11000); 106 } 107 } 108 109 return 0; 110 } 111 112 static int dwc3_pci_probe(struct pci_dev *pci, 113 const struct pci_device_id *id) 114 { 115 struct resource res[2]; 116 struct platform_device *dwc3; 117 int ret; 118 struct device *dev = &pci->dev; 119 120 ret = pcim_enable_device(pci); 121 if (ret) { 122 dev_err(dev, "failed to enable pci device\n"); 123 return -ENODEV; 124 } 125 126 pci_set_master(pci); 127 128 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 129 if (!dwc3) { 130 dev_err(dev, "couldn't allocate dwc3 device\n"); 131 return -ENOMEM; 132 } 133 134 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 135 136 res[0].start = pci_resource_start(pci, 0); 137 res[0].end = pci_resource_end(pci, 0); 138 res[0].name = "dwc_usb3"; 139 res[0].flags = IORESOURCE_MEM; 140 141 res[1].start = pci->irq; 142 res[1].name = "dwc_usb3"; 143 res[1].flags = IORESOURCE_IRQ; 144 145 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 146 if (ret) { 147 dev_err(dev, "couldn't add resources to dwc3 device\n"); 148 return ret; 149 } 150 151 pci_set_drvdata(pci, dwc3); 152 ret = dwc3_pci_quirks(pci); 153 if (ret) 154 goto err; 155 156 dwc3->dev.parent = dev; 157 158 ret = platform_device_add(dwc3); 159 if (ret) { 160 dev_err(dev, "failed to register dwc3 device\n"); 161 goto err; 162 } 163 164 return 0; 165 err: 166 platform_device_put(dwc3); 167 return ret; 168 } 169 170 static void dwc3_pci_remove(struct pci_dev *pci) 171 { 172 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); 173 platform_device_unregister(pci_get_drvdata(pci)); 174 } 175 176 static const struct pci_device_id dwc3_pci_id_table[] = { 177 { 178 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 179 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 180 }, 181 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, 182 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, 183 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, 184 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, 185 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, 186 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, 187 { } /* Terminating Entry */ 188 }; 189 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 190 191 static struct pci_driver dwc3_pci_driver = { 192 .name = "dwc3-pci", 193 .id_table = dwc3_pci_id_table, 194 .probe = dwc3_pci_probe, 195 .remove = dwc3_pci_remove, 196 }; 197 198 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 199 MODULE_LICENSE("GPL v2"); 200 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 201 202 module_pci_driver(dwc3_pci_driver); 203