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_SYNOPSYS_HAPSUSB3_AXI 0xabce
31 #define PCI_DEVICE_ID_INTEL_BYT 0x0f37
32 #define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
33 #define PCI_DEVICE_ID_INTEL_BSW 0x22B7
34 #define PCI_DEVICE_ID_INTEL_SPTLP 0x9d30
35 #define PCI_DEVICE_ID_INTEL_SPTH 0xa130
37 static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
38 static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
40 static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
41 { "reset-gpios", &reset_gpios, 1 },
42 { "cs-gpios", &cs_gpios, 1 },
46 static int dwc3_pci_quirks(struct pci_dev *pdev)
48 if (pdev->vendor == PCI_VENDOR_ID_AMD &&
49 pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
50 struct dwc3_platform_data pdata;
52 memset(&pdata, 0, sizeof(pdata));
54 pdata.has_lpm_erratum = true;
55 pdata.lpm_nyet_threshold = 0xf;
57 pdata.u2exit_lfps_quirk = true;
58 pdata.u2ss_inp3_quirk = true;
59 pdata.req_p1p2p3_quirk = true;
60 pdata.del_p1p2p3_quirk = true;
61 pdata.del_phy_power_chg_quirk = true;
62 pdata.lfps_filter_quirk = true;
63 pdata.rx_detect_poll_quirk = true;
65 pdata.tx_de_emphasis_quirk = true;
66 pdata.tx_de_emphasis = 1;
69 * FIXME these quirks should be removed when AMD NL
72 pdata.disable_scramble_quirk = true;
73 pdata.dis_u3_susphy_quirk = true;
74 pdata.dis_u2_susphy_quirk = true;
76 return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
80 if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
81 pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
82 struct gpio_desc *gpio;
84 acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
88 * These GPIOs will turn on the USB2 PHY. Note that we have to
89 * put the gpio descriptors again here because the phy driver
90 * might want to grab them, too.
92 gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
96 gpiod_set_value_cansleep(gpio, 1);
99 gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
101 return PTR_ERR(gpio);
104 gpiod_set_value_cansleep(gpio, 1);
106 usleep_range(10000, 11000);
113 static int dwc3_pci_probe(struct pci_dev *pci,
114 const struct pci_device_id *id)
116 struct resource res[2];
117 struct platform_device *dwc3;
119 struct device *dev = &pci->dev;
121 ret = pcim_enable_device(pci);
123 dev_err(dev, "failed to enable pci device\n");
129 dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
131 dev_err(dev, "couldn't allocate dwc3 device\n");
135 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
137 res[0].start = pci_resource_start(pci, 0);
138 res[0].end = pci_resource_end(pci, 0);
139 res[0].name = "dwc_usb3";
140 res[0].flags = IORESOURCE_MEM;
142 res[1].start = pci->irq;
143 res[1].name = "dwc_usb3";
144 res[1].flags = IORESOURCE_IRQ;
146 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
148 dev_err(dev, "couldn't add resources to dwc3 device\n");
152 pci_set_drvdata(pci, dwc3);
153 ret = dwc3_pci_quirks(pci);
157 dwc3->dev.parent = dev;
158 ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
160 ret = platform_device_add(dwc3);
162 dev_err(dev, "failed to register dwc3 device\n");
168 platform_device_put(dwc3);
172 static void dwc3_pci_remove(struct pci_dev *pci)
174 acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
175 platform_device_unregister(pci_get_drvdata(pci));
178 static const struct pci_device_id dwc3_pci_id_table[] = {
180 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
181 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
184 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
185 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
187 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
188 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
189 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
190 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
191 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
192 { PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
193 { } /* Terminating Entry */
195 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
197 static struct pci_driver dwc3_pci_driver = {
199 .id_table = dwc3_pci_id_table,
200 .probe = dwc3_pci_probe,
201 .remove = dwc3_pci_remove,
204 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
205 MODULE_LICENSE("GPL v2");
206 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
208 module_pci_driver(dwc3_pci_driver);