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 #define PCI_DEVICE_ID_INTEL_KBP 0xa2b0 41 42 static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; 43 static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; 44 45 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { 46 { "reset-gpios", &reset_gpios, 1 }, 47 { "cs-gpios", &cs_gpios, 1 }, 48 { }, 49 }; 50 51 static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3) 52 { 53 if (pdev->vendor == PCI_VENDOR_ID_AMD && 54 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) { 55 struct property_entry properties[] = { 56 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 57 PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf), 58 PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"), 59 PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"), 60 PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"), 61 PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"), 62 PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"), 63 PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"), 64 PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"), 65 PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"), 66 PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1), 67 /* 68 * FIXME these quirks should be removed when AMD NL 69 * tapes out 70 */ 71 PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"), 72 PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"), 73 PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"), 74 { }, 75 }; 76 77 return platform_device_add_properties(dwc3, properties); 78 } 79 80 if (pdev->vendor == PCI_VENDOR_ID_INTEL) { 81 int ret; 82 83 struct property_entry properties[] = { 84 PROPERTY_ENTRY_STRING("dr-mode", "peripheral"), 85 { } 86 }; 87 88 ret = platform_device_add_properties(dwc3, properties); 89 if (ret < 0) 90 return ret; 91 92 if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) { 93 struct gpio_desc *gpio; 94 95 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), 96 acpi_dwc3_byt_gpios); 97 98 /* 99 * These GPIOs will turn on the USB2 PHY. Note that we have to 100 * put the gpio descriptors again here because the phy driver 101 * might want to grab them, too. 102 */ 103 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW); 104 if (IS_ERR(gpio)) 105 return PTR_ERR(gpio); 106 107 gpiod_set_value_cansleep(gpio, 1); 108 gpiod_put(gpio); 109 110 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW); 111 if (IS_ERR(gpio)) 112 return PTR_ERR(gpio); 113 114 if (gpio) { 115 gpiod_set_value_cansleep(gpio, 1); 116 gpiod_put(gpio); 117 usleep_range(10000, 11000); 118 } 119 } 120 } 121 122 if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS && 123 (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 || 124 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI || 125 pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) { 126 struct property_entry properties[] = { 127 PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), 128 PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 129 PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), 130 { }, 131 }; 132 133 return platform_device_add_properties(dwc3, properties); 134 } 135 136 return 0; 137 } 138 139 static int dwc3_pci_probe(struct pci_dev *pci, 140 const struct pci_device_id *id) 141 { 142 struct resource res[2]; 143 struct platform_device *dwc3; 144 int ret; 145 struct device *dev = &pci->dev; 146 147 ret = pcim_enable_device(pci); 148 if (ret) { 149 dev_err(dev, "failed to enable pci device\n"); 150 return -ENODEV; 151 } 152 153 pci_set_master(pci); 154 155 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 156 if (!dwc3) { 157 dev_err(dev, "couldn't allocate dwc3 device\n"); 158 return -ENOMEM; 159 } 160 161 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 162 163 res[0].start = pci_resource_start(pci, 0); 164 res[0].end = pci_resource_end(pci, 0); 165 res[0].name = "dwc_usb3"; 166 res[0].flags = IORESOURCE_MEM; 167 168 res[1].start = pci->irq; 169 res[1].name = "dwc_usb3"; 170 res[1].flags = IORESOURCE_IRQ; 171 172 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 173 if (ret) { 174 dev_err(dev, "couldn't add resources to dwc3 device\n"); 175 return ret; 176 } 177 178 dwc3->dev.parent = dev; 179 ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev)); 180 181 ret = dwc3_pci_quirks(pci, dwc3); 182 if (ret) 183 goto err; 184 185 ret = platform_device_add(dwc3); 186 if (ret) { 187 dev_err(dev, "failed to register dwc3 device\n"); 188 goto err; 189 } 190 191 device_init_wakeup(dev, true); 192 device_set_run_wake(dev, true); 193 pci_set_drvdata(pci, dwc3); 194 pm_runtime_put(dev); 195 196 return 0; 197 err: 198 platform_device_put(dwc3); 199 return ret; 200 } 201 202 static void dwc3_pci_remove(struct pci_dev *pci) 203 { 204 device_init_wakeup(&pci->dev, false); 205 pm_runtime_get(&pci->dev); 206 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); 207 platform_device_unregister(pci_get_drvdata(pci)); 208 } 209 210 static const struct pci_device_id dwc3_pci_id_table[] = { 211 { 212 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 213 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 214 }, 215 { 216 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 217 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), 218 }, 219 { 220 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 221 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), 222 }, 223 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, 224 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, 225 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, 226 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, 227 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, 228 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), }, 229 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), }, 230 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), }, 231 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_KBP), }, 232 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, 233 { } /* Terminating Entry */ 234 }; 235 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 236 237 #ifdef CONFIG_PM 238 static int dwc3_pci_runtime_suspend(struct device *dev) 239 { 240 if (device_run_wake(dev)) 241 return 0; 242 243 return -EBUSY; 244 } 245 246 static int dwc3_pci_runtime_resume(struct device *dev) 247 { 248 struct platform_device *dwc3 = dev_get_drvdata(dev); 249 250 return pm_runtime_get(&dwc3->dev); 251 } 252 #endif /* CONFIG_PM */ 253 254 #ifdef CONFIG_PM_SLEEP 255 static int dwc3_pci_pm_dummy(struct device *dev) 256 { 257 /* 258 * There's nothing to do here. No, seriously. Everything is either taken 259 * care either by PCI subsystem or dwc3/core.c, so we have nothing 260 * missing here. 261 * 262 * So you'd think we didn't need this at all, but PCI subsystem will 263 * bail out if we don't have a valid callback :-s 264 */ 265 return 0; 266 } 267 #endif /* CONFIG_PM_SLEEP */ 268 269 static struct dev_pm_ops dwc3_pci_dev_pm_ops = { 270 SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy) 271 SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_runtime_resume, 272 NULL) 273 }; 274 275 static struct pci_driver dwc3_pci_driver = { 276 .name = "dwc3-pci", 277 .id_table = dwc3_pci_id_table, 278 .probe = dwc3_pci_probe, 279 .remove = dwc3_pci_remove, 280 .driver = { 281 .pm = &dwc3_pci_dev_pm_ops, 282 } 283 }; 284 285 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 286 MODULE_LICENSE("GPL v2"); 287 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 288 289 module_pci_driver(dwc3_pci_driver); 290