234 lines
6.3 KiB
C
234 lines
6.3 KiB
C
/**
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* dwc3-pci.c - PCI Specific glue layer
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*
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* Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
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*
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* Authors: Felipe Balbi <balbi@ti.com>,
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* Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 of
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* the License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/pci.h>
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#include <linux/platform_device.h>
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#include <linux/gpio/consumer.h>
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#include <linux/acpi.h>
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#include "platform_data.h"
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI 0xabce
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#define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31 0xabcf
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#define PCI_DEVICE_ID_INTEL_BYT 0x0f37
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#define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
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#define PCI_DEVICE_ID_INTEL_BSW 0x22b7
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#define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30
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#define PCI_DEVICE_ID_INTEL_SPTH 0xa130
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#define PCI_DEVICE_ID_INTEL_BXT 0x0aaa
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#define PCI_DEVICE_ID_INTEL_APL 0x5aaa
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static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
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static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
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static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
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{ "reset-gpios", &reset_gpios, 1 },
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{ "cs-gpios", &cs_gpios, 1 },
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{ },
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};
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static int dwc3_pci_quirks(struct pci_dev *pdev)
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{
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if (pdev->vendor == PCI_VENDOR_ID_AMD &&
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pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
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struct dwc3_platform_data pdata;
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memset(&pdata, 0, sizeof(pdata));
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pdata.has_lpm_erratum = true;
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pdata.lpm_nyet_threshold = 0xf;
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pdata.u2exit_lfps_quirk = true;
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pdata.u2ss_inp3_quirk = true;
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pdata.req_p1p2p3_quirk = true;
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pdata.del_p1p2p3_quirk = true;
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pdata.del_phy_power_chg_quirk = true;
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pdata.lfps_filter_quirk = true;
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pdata.rx_detect_poll_quirk = true;
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pdata.tx_de_emphasis_quirk = true;
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pdata.tx_de_emphasis = 1;
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/*
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* FIXME these quirks should be removed when AMD NL
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* taps out
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*/
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pdata.disable_scramble_quirk = true;
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pdata.dis_u3_susphy_quirk = true;
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pdata.dis_u2_susphy_quirk = true;
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return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
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sizeof(pdata));
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}
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if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
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pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
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struct gpio_desc *gpio;
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acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
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acpi_dwc3_byt_gpios);
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/*
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* These GPIOs will turn on the USB2 PHY. Note that we have to
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* put the gpio descriptors again here because the phy driver
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* might want to grab them, too.
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*/
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gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
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if (IS_ERR(gpio))
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return PTR_ERR(gpio);
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gpiod_set_value_cansleep(gpio, 1);
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gpiod_put(gpio);
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gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(gpio))
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return PTR_ERR(gpio);
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if (gpio) {
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gpiod_set_value_cansleep(gpio, 1);
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gpiod_put(gpio);
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usleep_range(10000, 11000);
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}
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}
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if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
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(pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
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pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
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pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
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struct dwc3_platform_data pdata;
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memset(&pdata, 0, sizeof(pdata));
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pdata.usb3_lpm_capable = true;
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pdata.has_lpm_erratum = true;
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pdata.dis_enblslpm_quirk = true;
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return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
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sizeof(pdata));
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}
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return 0;
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}
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static int dwc3_pci_probe(struct pci_dev *pci,
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const struct pci_device_id *id)
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{
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struct resource res[2];
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struct platform_device *dwc3;
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int ret;
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struct device *dev = &pci->dev;
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ret = pcim_enable_device(pci);
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if (ret) {
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dev_err(dev, "failed to enable pci device\n");
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return -ENODEV;
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}
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pci_set_master(pci);
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dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
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if (!dwc3) {
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dev_err(dev, "couldn't allocate dwc3 device\n");
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return -ENOMEM;
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}
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memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
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res[0].start = pci_resource_start(pci, 0);
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res[0].end = pci_resource_end(pci, 0);
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res[0].name = "dwc_usb3";
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res[0].flags = IORESOURCE_MEM;
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res[1].start = pci->irq;
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res[1].name = "dwc_usb3";
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res[1].flags = IORESOURCE_IRQ;
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ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
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if (ret) {
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dev_err(dev, "couldn't add resources to dwc3 device\n");
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return ret;
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}
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pci_set_drvdata(pci, dwc3);
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ret = dwc3_pci_quirks(pci);
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if (ret)
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goto err;
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dwc3->dev.parent = dev;
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ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
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ret = platform_device_add(dwc3);
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if (ret) {
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dev_err(dev, "failed to register dwc3 device\n");
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goto err;
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}
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return 0;
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err:
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platform_device_put(dwc3);
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return ret;
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}
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static void dwc3_pci_remove(struct pci_dev *pci)
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{
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acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
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platform_device_unregister(pci_get_drvdata(pci));
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}
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static const struct pci_device_id dwc3_pci_id_table[] = {
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
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},
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{
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PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
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PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
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},
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
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{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
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{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
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{ } /* Terminating Entry */
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};
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MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
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static struct pci_driver dwc3_pci_driver = {
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.name = "dwc3-pci",
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.id_table = dwc3_pci_id_table,
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.probe = dwc3_pci_probe,
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.remove = dwc3_pci_remove,
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};
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MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
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module_pci_driver(dwc3_pci_driver);
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