172246da4SFelipe Balbi /** 272246da4SFelipe Balbi * dwc3-pci.c - PCI Specific glue layer 372246da4SFelipe Balbi * 472246da4SFelipe Balbi * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com 572246da4SFelipe Balbi * 672246da4SFelipe Balbi * Authors: Felipe Balbi <balbi@ti.com>, 772246da4SFelipe Balbi * Sebastian Andrzej Siewior <bigeasy@linutronix.de> 872246da4SFelipe Balbi * 95945f789SFelipe Balbi * This program is free software: you can redistribute it and/or modify 105945f789SFelipe Balbi * it under the terms of the GNU General Public License version 2 of 115945f789SFelipe Balbi * the License as published by the Free Software Foundation. 1272246da4SFelipe Balbi * 135945f789SFelipe Balbi * This program is distributed in the hope that it will be useful, 145945f789SFelipe Balbi * but WITHOUT ANY WARRANTY; without even the implied warranty of 155945f789SFelipe Balbi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 165945f789SFelipe Balbi * GNU General Public License for more details. 1772246da4SFelipe Balbi */ 1872246da4SFelipe Balbi 1972246da4SFelipe Balbi #include <linux/kernel.h> 2046a57283SStephen Rothwell #include <linux/module.h> 2172246da4SFelipe Balbi #include <linux/slab.h> 2272246da4SFelipe Balbi #include <linux/pci.h> 23e9af9229SFelipe Balbi #include <linux/pm_runtime.h> 2472246da4SFelipe Balbi #include <linux/platform_device.h> 25a89d977cSHeikki Krogerus #include <linux/gpio/consumer.h> 26a89d977cSHeikki Krogerus #include <linux/acpi.h> 27cf48305dSHeikki Krogerus #include <linux/delay.h> 288f317b47SHuang Rui 2972246da4SFelipe Balbi #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd 3041adc59cSJohn Youn #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce 31e8095a25SJohn Youn #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf 32b62cd96dSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_BYT 0x0f37 3385601f8cSDavid Cohen #define PCI_DEVICE_ID_INTEL_MRFLD 0x119e 349a5a0783SJohn Youn #define PCI_DEVICE_ID_INTEL_BSW 0x22b7 3584a2b61bSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30 3684a2b61bSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_SPTH 0xa130 37b4c580a4SHeikki Krogerus #define PCI_DEVICE_ID_INTEL_BXT 0x0aaa 381ffb4d5cSHeikki Krogerus #define PCI_DEVICE_ID_INTEL_BXT_M 0x1aaa 39b4c580a4SHeikki Krogerus #define PCI_DEVICE_ID_INTEL_APL 0x5aaa 4072246da4SFelipe Balbi 41a89d977cSHeikki Krogerus static const struct acpi_gpio_params reset_gpios = { 0, 0, false }; 42a89d977cSHeikki Krogerus static const struct acpi_gpio_params cs_gpios = { 1, 0, false }; 43a89d977cSHeikki Krogerus 44a89d977cSHeikki Krogerus static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = { 45a89d977cSHeikki Krogerus { "reset-gpios", &reset_gpios, 1 }, 46a89d977cSHeikki Krogerus { "cs-gpios", &cs_gpios, 1 }, 47a89d977cSHeikki Krogerus { }, 48a89d977cSHeikki Krogerus }; 49a89d977cSHeikki Krogerus 50ce046d32SHeikki Krogerus static int dwc3_pci_quirks(struct pci_dev *pdev, struct platform_device *dwc3) 512cd9ddf7SHeikki Krogerus { 522cd9ddf7SHeikki Krogerus if (pdev->vendor == PCI_VENDOR_ID_AMD && 532cd9ddf7SHeikki Krogerus pdev->device == PCI_DEVICE_ID_AMD_NL_USB) { 54cf48305dSHeikki Krogerus struct property_entry properties[] = { 55cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 56cf48305dSHeikki Krogerus PROPERTY_ENTRY_U8("snps,lpm-nyet-threshold", 0xf), 57cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,u2exit_lfps_quirk"), 58cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,u2ss_inp3_quirk"), 59cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,req_p1p2p3_quirk"), 60cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,del_p1p2p3_quirk"), 61cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,del_phy_power_chg_quirk"), 62cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,lfps_filter_quirk"), 63cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,rx_detect_poll_quirk"), 64cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,tx_de_emphasis_quirk"), 65cf48305dSHeikki Krogerus PROPERTY_ENTRY_U8("snps,tx_de_emphasis", 1), 662cd9ddf7SHeikki Krogerus /* 672cd9ddf7SHeikki Krogerus * FIXME these quirks should be removed when AMD NL 68cf48305dSHeikki Krogerus * tapes out 692cd9ddf7SHeikki Krogerus */ 70cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,disable_scramble_quirk"), 71cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"), 72cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"), 73cf48305dSHeikki Krogerus { }, 74cf48305dSHeikki Krogerus }; 752cd9ddf7SHeikki Krogerus 76cf48305dSHeikki Krogerus return platform_device_add_properties(dwc3, properties); 772cd9ddf7SHeikki Krogerus } 782cd9ddf7SHeikki Krogerus 79*e6fe66feSFelipe Balbi if (pdev->vendor == PCI_VENDOR_ID_INTEL) { 80*e6fe66feSFelipe Balbi int ret; 81*e6fe66feSFelipe Balbi 82*e6fe66feSFelipe Balbi struct property_entry properties[] = { 83*e6fe66feSFelipe Balbi PROPERTY_ENTRY_STRING("dr-mode", "peripheral"), 84*e6fe66feSFelipe Balbi { } 85*e6fe66feSFelipe Balbi }; 86*e6fe66feSFelipe Balbi 87*e6fe66feSFelipe Balbi ret = platform_device_add_properties(dwc3, properties); 88*e6fe66feSFelipe Balbi if (ret < 0) 89*e6fe66feSFelipe Balbi return ret; 90*e6fe66feSFelipe Balbi 91*e6fe66feSFelipe Balbi if (pdev->device == PCI_DEVICE_ID_INTEL_BYT) { 92a89d977cSHeikki Krogerus struct gpio_desc *gpio; 93a89d977cSHeikki Krogerus 94a89d977cSHeikki Krogerus acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev), 95a89d977cSHeikki Krogerus acpi_dwc3_byt_gpios); 96a89d977cSHeikki Krogerus 972df033caSUwe Kleine-König /* 982df033caSUwe Kleine-König * These GPIOs will turn on the USB2 PHY. Note that we have to 992df033caSUwe Kleine-König * put the gpio descriptors again here because the phy driver 1002df033caSUwe Kleine-König * might want to grab them, too. 1012df033caSUwe Kleine-König */ 1022df033caSUwe Kleine-König gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW); 1032df033caSUwe Kleine-König if (IS_ERR(gpio)) 1042df033caSUwe Kleine-König return PTR_ERR(gpio); 1052df033caSUwe Kleine-König 106a89d977cSHeikki Krogerus gpiod_set_value_cansleep(gpio, 1); 107a89d977cSHeikki Krogerus gpiod_put(gpio); 108a89d977cSHeikki Krogerus 1092df033caSUwe Kleine-König gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW); 1102df033caSUwe Kleine-König if (IS_ERR(gpio)) 1112df033caSUwe Kleine-König return PTR_ERR(gpio); 1122df033caSUwe Kleine-König 1132df033caSUwe Kleine-König if (gpio) { 114a89d977cSHeikki Krogerus gpiod_set_value_cansleep(gpio, 1); 115a89d977cSHeikki Krogerus gpiod_put(gpio); 116a89d977cSHeikki Krogerus usleep_range(10000, 11000); 117a89d977cSHeikki Krogerus } 118a89d977cSHeikki Krogerus } 119*e6fe66feSFelipe Balbi } 120a89d977cSHeikki Krogerus 121bb7f3d6dSJohn Youn if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS && 122bb7f3d6dSJohn Youn (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 || 123bb7f3d6dSJohn Youn pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI || 124bb7f3d6dSJohn Youn pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) { 125cf48305dSHeikki Krogerus struct property_entry properties[] = { 126cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,usb3_lpm_capable"), 127cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,has-lpm-erratum"), 128cf48305dSHeikki Krogerus PROPERTY_ENTRY_BOOL("snps,dis_enblslpm_quirk"), 129cf48305dSHeikki Krogerus { }, 130cf48305dSHeikki Krogerus }; 131bb7f3d6dSJohn Youn 132cf48305dSHeikki Krogerus return platform_device_add_properties(dwc3, properties); 133bb7f3d6dSJohn Youn } 134bb7f3d6dSJohn Youn 1352cd9ddf7SHeikki Krogerus return 0; 1362cd9ddf7SHeikki Krogerus } 13772246da4SFelipe Balbi 13841ac7b3aSBill Pemberton static int dwc3_pci_probe(struct pci_dev *pci, 13972246da4SFelipe Balbi const struct pci_device_id *id) 14072246da4SFelipe Balbi { 14172246da4SFelipe Balbi struct resource res[2]; 14272246da4SFelipe Balbi struct platform_device *dwc3; 143b09e99eeSAndy Shevchenko int ret; 144802ca850SChanho Park struct device *dev = &pci->dev; 14572246da4SFelipe Balbi 146f1c7e710SAndy Shevchenko ret = pcim_enable_device(pci); 14772246da4SFelipe Balbi if (ret) { 148802ca850SChanho Park dev_err(dev, "failed to enable pci device\n"); 149802ca850SChanho Park return -ENODEV; 15072246da4SFelipe Balbi } 15172246da4SFelipe Balbi 15272246da4SFelipe Balbi pci_set_master(pci); 15372246da4SFelipe Balbi 154124dafdeSSebastian Andrzej Siewior dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO); 15572246da4SFelipe Balbi if (!dwc3) { 156802ca850SChanho Park dev_err(dev, "couldn't allocate dwc3 device\n"); 157f1c7e710SAndy Shevchenko return -ENOMEM; 15872246da4SFelipe Balbi } 15972246da4SFelipe Balbi 16072246da4SFelipe Balbi memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res)); 16172246da4SFelipe Balbi 16272246da4SFelipe Balbi res[0].start = pci_resource_start(pci, 0); 16372246da4SFelipe Balbi res[0].end = pci_resource_end(pci, 0); 16472246da4SFelipe Balbi res[0].name = "dwc_usb3"; 16572246da4SFelipe Balbi res[0].flags = IORESOURCE_MEM; 16672246da4SFelipe Balbi 16772246da4SFelipe Balbi res[1].start = pci->irq; 16872246da4SFelipe Balbi res[1].name = "dwc_usb3"; 16972246da4SFelipe Balbi res[1].flags = IORESOURCE_IRQ; 17072246da4SFelipe Balbi 17172246da4SFelipe Balbi ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res)); 17272246da4SFelipe Balbi if (ret) { 173802ca850SChanho Park dev_err(dev, "couldn't add resources to dwc3 device\n"); 174f1c7e710SAndy Shevchenko return ret; 17572246da4SFelipe Balbi } 17672246da4SFelipe Balbi 177802ca850SChanho Park dwc3->dev.parent = dev; 1789caeb06eSHeikki Krogerus ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev)); 17972246da4SFelipe Balbi 180ce046d32SHeikki Krogerus ret = dwc3_pci_quirks(pci, dwc3); 181474799f0SHeikki Krogerus if (ret) 182474799f0SHeikki Krogerus goto err; 183474799f0SHeikki Krogerus 18472246da4SFelipe Balbi ret = platform_device_add(dwc3); 18572246da4SFelipe Balbi if (ret) { 186802ca850SChanho Park dev_err(dev, "failed to register dwc3 device\n"); 1872cd9ddf7SHeikki Krogerus goto err; 18872246da4SFelipe Balbi } 18972246da4SFelipe Balbi 190e9af9229SFelipe Balbi device_init_wakeup(dev, true); 191e9af9229SFelipe Balbi device_set_run_wake(dev, true); 192ce046d32SHeikki Krogerus pci_set_drvdata(pci, dwc3); 193e9af9229SFelipe Balbi pm_runtime_put(dev); 194e9af9229SFelipe Balbi 19572246da4SFelipe Balbi return 0; 1962cd9ddf7SHeikki Krogerus err: 19772246da4SFelipe Balbi platform_device_put(dwc3); 19872246da4SFelipe Balbi return ret; 19972246da4SFelipe Balbi } 20072246da4SFelipe Balbi 201fb4e98abSBill Pemberton static void dwc3_pci_remove(struct pci_dev *pci) 20272246da4SFelipe Balbi { 203e9af9229SFelipe Balbi device_init_wakeup(&pci->dev, false); 204e9af9229SFelipe Balbi pm_runtime_get(&pci->dev); 205a89d977cSHeikki Krogerus acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev)); 2062cd9ddf7SHeikki Krogerus platform_device_unregister(pci_get_drvdata(pci)); 20772246da4SFelipe Balbi } 20872246da4SFelipe Balbi 209782df20cSJingoo Han static const struct pci_device_id dwc3_pci_id_table[] = { 21072246da4SFelipe Balbi { 21172246da4SFelipe Balbi PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 21272246da4SFelipe Balbi PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3), 21372246da4SFelipe Balbi }, 21441adc59cSJohn Youn { 21541adc59cSJohn Youn PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 21641adc59cSJohn Youn PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI), 21741adc59cSJohn Youn }, 218e8095a25SJohn Youn { 219e8095a25SJohn Youn PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS, 220e8095a25SJohn Youn PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31), 221e8095a25SJohn Youn }, 2227d643664SAlan Cox { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), }, 223b62cd96dSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), }, 22485601f8cSDavid Cohen { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), }, 22584a2b61bSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), }, 22684a2b61bSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), }, 227b4c580a4SHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), }, 2281ffb4d5cSHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), }, 229b4c580a4SHeikki Krogerus { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), }, 2309755449dSHuang Rui { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), }, 23172246da4SFelipe Balbi { } /* Terminating Entry */ 23272246da4SFelipe Balbi }; 23372246da4SFelipe Balbi MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table); 23472246da4SFelipe Balbi 235e9af9229SFelipe Balbi #ifdef CONFIG_PM 236e9af9229SFelipe Balbi static int dwc3_pci_runtime_suspend(struct device *dev) 237e9af9229SFelipe Balbi { 238e9af9229SFelipe Balbi if (device_run_wake(dev)) 239e9af9229SFelipe Balbi return 0; 240e9af9229SFelipe Balbi 241e9af9229SFelipe Balbi return -EBUSY; 242e9af9229SFelipe Balbi } 243e9af9229SFelipe Balbi 244e9af9229SFelipe Balbi static int dwc3_pci_pm_dummy(struct device *dev) 245e9af9229SFelipe Balbi { 246e9af9229SFelipe Balbi /* 247e9af9229SFelipe Balbi * There's nothing to do here. No, seriously. Everything is either taken 248e9af9229SFelipe Balbi * care either by PCI subsystem or dwc3/core.c, so we have nothing 249e9af9229SFelipe Balbi * missing here. 250e9af9229SFelipe Balbi * 251e9af9229SFelipe Balbi * So you'd think we didn't need this at all, but PCI subsystem will 252e9af9229SFelipe Balbi * bail out if we don't have a valid callback :-s 253e9af9229SFelipe Balbi */ 254e9af9229SFelipe Balbi return 0; 255e9af9229SFelipe Balbi } 256e9af9229SFelipe Balbi #endif /* CONFIG_PM */ 257e9af9229SFelipe Balbi 258e9af9229SFelipe Balbi static struct dev_pm_ops dwc3_pci_dev_pm_ops = { 259e9af9229SFelipe Balbi SET_SYSTEM_SLEEP_PM_OPS(dwc3_pci_pm_dummy, dwc3_pci_pm_dummy) 260e9af9229SFelipe Balbi SET_RUNTIME_PM_OPS(dwc3_pci_runtime_suspend, dwc3_pci_pm_dummy, 261e9af9229SFelipe Balbi NULL) 262e9af9229SFelipe Balbi }; 263e9af9229SFelipe Balbi 26472246da4SFelipe Balbi static struct pci_driver dwc3_pci_driver = { 2650949e99bSFelipe Balbi .name = "dwc3-pci", 26672246da4SFelipe Balbi .id_table = dwc3_pci_id_table, 26772246da4SFelipe Balbi .probe = dwc3_pci_probe, 2687690417dSBill Pemberton .remove = dwc3_pci_remove, 269e9af9229SFelipe Balbi .driver = { 270e9af9229SFelipe Balbi .pm = &dwc3_pci_dev_pm_ops, 271e9af9229SFelipe Balbi } 27272246da4SFelipe Balbi }; 27372246da4SFelipe Balbi 27472246da4SFelipe Balbi MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>"); 2755945f789SFelipe Balbi MODULE_LICENSE("GPL v2"); 27672246da4SFelipe Balbi MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer"); 27772246da4SFelipe Balbi 27895656336SGreg Kroah-Hartman module_pci_driver(dwc3_pci_driver); 279