2 * dwc3-pci.c - PCI Specific glue layer
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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.
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.
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>
27 #include "platform_data.h"
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
36 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
37 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
39 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
40 { "reset-gpios", &reset_gpios, 1 },
41 { "cs-gpios", &cs_gpios, 1 },
45 static int dwc3_pci_quirks(struct pci_dev *pdev)
47 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
48 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
49 struct dwc3_platform_data pdata;
51 memset(&pdata, 0, sizeof(pdata));
53 pdata.has_lpm_erratum = true;
54 pdata.lpm_nyet_threshold = 0xf;
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;
64 pdata.tx_de_emphasis_quirk = true;
65 pdata.tx_de_emphasis = 1;
68 * FIXME these quirks should be removed when AMD NL
71 pdata.disable_scramble_quirk = true;
72 pdata.dis_u3_susphy_quirk = true;
73 pdata.dis_u2_susphy_quirk = true;
75 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
79 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
80 pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
81 struct gpio_desc *gpio;
83 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
86 /* These GPIOs will turn on the USB2 PHY */
87 gpio = gpiod_get(&pdev->dev, "cs");
89 gpiod_direction_output(gpio, 0);
90 gpiod_set_value_cansleep(gpio, 1);
94 gpio = gpiod_get(&pdev->dev, "reset");
96 gpiod_direction_output(gpio, 0);
97 gpiod_set_value_cansleep(gpio, 1);
99 usleep_range(10000, 11000);
106 static int dwc3_pci_probe(struct pci_dev *pci,
107 const struct pci_device_id *id)
109 struct resource res[2];
110 struct platform_device *dwc3;
112 struct device *dev = &pci->dev;
114 ret = pcim_enable_device(pci);
116 dev_err(dev, "failed to enable pci device\n");
122 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
124 dev_err(dev, "couldn't allocate dwc3 device\n");
128 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
130 res[0].start = pci_resource_start(pci, 0);
131 res[0].end = pci_resource_end(pci, 0);
132 res[0].name = "dwc_usb3";
133 res[0].flags = IORESOURCE_MEM;
135 res[1].start = pci->irq;
136 res[1].name = "dwc_usb3";
137 res[1].flags = IORESOURCE_IRQ;
139 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
141 dev_err(dev, "couldn't add resources to dwc3 device\n");
145 pci_set_drvdata(pci, dwc3);
146 ret = dwc3_pci_quirks(pci);
150 dwc3->dev.parent = dev;
152 ret = platform_device_add(dwc3);
154 dev_err(dev, "failed to register dwc3 device\n");
160 platform_device_put(dwc3);
164 static void dwc3_pci_remove(struct pci_dev *pci)
166 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
167 platform_device_unregister(pci_get_drvdata(pci));
170 static const struct pci_device_id dwc3_pci_id_table[] = {
172 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
173 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
175 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
176 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
177 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
178 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
179 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
180 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
181 { } /* Terminating Entry */
183 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
185 static struct pci_driver dwc3_pci_driver = {
187 .id_table = dwc3_pci_id_table,
188 .probe = dwc3_pci_probe,
189 .remove = dwc3_pci_remove,
192 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
193 MODULE_LICENSE("GPL v2");
194 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
196 module_pci_driver(dwc3_pci_driver);