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/pm_runtime.h> 24 #include <linux/platform_device.h> 25 #include <linux/gpio/consumer.h> 26 #include <linux/acpi.h> 27 #include <linux/delay.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, struct platform_device *dwc3) 51 { 52 if (pdev->vendor == PCI_VENDOR_ID_AMD && 53 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) { 54 struct property_entry properties[] = { 55 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 56 PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf), 57 PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"), 58 PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"), 59 PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"), 60 PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"), 61 PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"), 62 PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"), 63 PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"), 64 PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"), 65 PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1), 66 /* 67 * FIXME these quirks should be removed when AMD NL 68 * tapes out 69 */ 70 PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"), 71 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"), 72 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"), 73 { }, 74 }; 75 76 return platform_device_add_properties(dwc3, properties); 77 } 78 79 if (pdev->vendor == PCI_VENDOR_ID_INTEL) { 80 int ret; 81 82 struct property_entry properties[] = { 83 PROPERTY_ENTRY_STRING("dr-mode", "peripheral"), 84 { } 85 }; 86 87 ret = platform_device_add_properties(dwc3, properties); 88 if (ret < 0) 89 return ret; 90 91 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) { 92 struct gpio_desc *gpio; 93 94 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), 95 acpi_dwc3_byt_gpios); 96 97 /* 98 * These GPIOs will turn on the USB2 PHY. Note that we have to 99 * put the gpio descriptors again here because the phy driver 100 * might want to grab them, too. 101 */ 102 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW); 103 if (IS_ERR(gpio)) 104 return PTR_ERR(gpio); 105 106 gpiod_set_value_cansleep(gpio, 1); 107 gpiod_put(gpio); 108 109 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW); 110 if (IS_ERR(gpio)) 111 return PTR_ERR(gpio); 112 113 if (gpio) { 114 gpiod_set_value_cansleep(gpio, 1); 115 gpiod_put(gpio); 116 usleep_range(10000, 11000); 117 } 118 } 119 } 120 121 if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS && 122 (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 || 123 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI || 124 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) { 125 struct property_entry properties[] = { 126 PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), 127 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 128 PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), 129 { }, 130 }; 131 132 return platform_device_add_properties(dwc3, properties); 133 } 134 135 return 0; 136 } 137 138 static int dwc3_pci_probe(struct pci_dev *pci, 139 const struct pci_device_id *id) 140 { 141 struct resource res[2]; 142 struct platform_device *dwc3; 143 int ret; 144 struct device *dev = &pci->dev; 145 146 ret = pcim_enable_device(pci); 147 if (ret) { 148 dev_err(dev, "failed to enable pci device\n"); 149 return -ENODEV; 150 } 151 152 pci_set_master(pci); 153 154 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 155 if (!dwc3) { 156 dev_err(dev, "couldn't allocate dwc3 device\n"); 157 return -ENOMEM; 158 } 159 160 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 161 162 res[0].start = pci_resource_start(pci, 0); 163 res[0].end = pci_resource_end(pci, 0); 164 res[0].name = "dwc_usb3"; 165 res[0].flags = IORESOURCE_MEM; 166 167 res[1].start = pci->irq; 168 res[1].name = "dwc_usb3"; 169 res[1].flags = IORESOURCE_IRQ; 170 171 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 172 if (ret) { 173 dev_err(dev, "couldn't add resources to dwc3 device\n"); 174 return ret; 175 } 176 177 dwc3->dev.parent = dev; 178 ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev)); 179 180 ret = dwc3_pci_quirks(pci, dwc3); 181 if (ret) 182 goto err; 183 184 ret = platform_device_add(dwc3); 185 if (ret) { 186 dev_err(dev, "failed to register dwc3 device\n"); 187 goto err; 188 } 189 190 device_init_wakeup(dev, true); 191 device_set_run_wake(dev, true); 192 pci_set_drvdata(pci, dwc3); 193 pm_runtime_put(dev); 194 195 return 0; 196 err: 197 platform_device_put(dwc3); 198 return ret; 199 } 200 201 static void dwc3_pci_remove(struct pci_dev *pci) 202 { 203 device_init_wakeup(&pci->dev, false); 204 pm_runtime_get(&pci->dev); 205 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); 206 platform_device_unregister(pci_get_drvdata(pci)); 207 } 208 209 static const struct pci_device_id dwc3_pci_id_table[] = { 210 { 211 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 212 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 213 }, 214 { 215 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 216 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), 217 }, 218 { 219 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 220 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), 221 }, 222 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, 223 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, 224 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, 225 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, 226 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, 227 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), }, 228 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), }, 229 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), }, 230 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, 231 { } /* Terminating Entry */ 232 }; 233 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 234 235 #ifdef CONFIG_PM 236 static int dwc3_pci_runtime_suspend(struct device *dev) 237 { 238 if (device_run_wake(dev)) 239 return 0; 240 241 return -EBUSY; 242 } 243 244 static int dwc3_pci_pm_dummy(struct device *dev) 245 { 246 /* 247 * There's nothing to do here. No, seriously. Everything is either taken 248 * care either by PCI subsystem or dwc3/core.c, so we have nothing 249 * missing here. 250 * 251 * So you'd think we didn't need this at all, but PCI subsystem will 252 * bail out if we don't have a valid callback :-s 253 */ 254 return 0; 255 } 256 #endif /* CONFIG_PM */ 257 258 static struct dev_pm_ops dwc3_pci_dev_pm_ops = { 259 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy) 260 SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy, 261 NULL) 262 }; 263 264 static struct pci_driver dwc3_pci_driver = { 265 .name = "dwc3-pci", 266 .id_table = dwc3_pci_id_table, 267 .probe = dwc3_pci_probe, 268 .remove = dwc3_pci_remove, 269 .driver = { 270 .pm = &dwc3_pci_dev_pm_ops, 271 } 272 }; 273 274 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 275 MODULE_LICENSE("GPL v2"); 276 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 277 278 module_pci_driver(dwc3_pci_driver); 279