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/platform_device.h>
 24#include <linux/gpio/consumer.h>
 25#include <linux/acpi.h>
 26
 27#include "platform_data.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
 41static const struct acpi_gpio_params reset_gpios = { 0, 0, false };
 42static const struct acpi_gpio_params cs_gpios = { 1, 0, false };
 43
 44static const struct acpi_gpio_mapping acpi_dwc3_byt_gpios[] = {
 45	{ "reset-gpios", &reset_gpios, 1 },
 46	{ "cs-gpios", &cs_gpios, 1 },
 47	{ },
 48};
 49
 50static int dwc3_pci_quirks(struct pci_dev *pdev)
 51{
 52	if (pdev->vendor == PCI_VENDOR_ID_AMD &&
 53	    pdev->device == PCI_DEVICE_ID_AMD_NL_USB) {
 54		struct dwc3_platform_data pdata;
 55
 56		memset(&pdata, 0, sizeof(pdata));
 57
 58		pdata.has_lpm_erratum = true;
 59		pdata.lpm_nyet_threshold = 0xf;
 60
 61		pdata.u2exit_lfps_quirk = true;
 62		pdata.u2ss_inp3_quirk = true;
 63		pdata.req_p1p2p3_quirk = true;
 64		pdata.del_p1p2p3_quirk = true;
 65		pdata.del_phy_power_chg_quirk = true;
 66		pdata.lfps_filter_quirk = true;
 67		pdata.rx_detect_poll_quirk = true;
 68
 69		pdata.tx_de_emphasis_quirk = true;
 70		pdata.tx_de_emphasis = 1;
 71
 72		/*
 73		 * FIXME these quirks should be removed when AMD NL
 74		 * taps out
 75		 */
 76		pdata.disable_scramble_quirk = true;
 77		pdata.dis_u3_susphy_quirk = true;
 78		pdata.dis_u2_susphy_quirk = true;
 79
 80		return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
 81						sizeof(pdata));
 82	}
 83
 84	if (pdev->vendor == PCI_VENDOR_ID_INTEL &&
 85	    pdev->device == PCI_DEVICE_ID_INTEL_BYT) {
 86		struct gpio_desc *gpio;
 87
 88		acpi_dev_add_driver_gpios(ACPI_COMPANION(&pdev->dev),
 89					  acpi_dwc3_byt_gpios);
 90
 91		/*
 92		 * These GPIOs will turn on the USB2 PHY. Note that we have to
 93		 * put the gpio descriptors again here because the phy driver
 94		 * might want to grab them, too.
 95		 */
 96		gpio = gpiod_get_optional(&pdev->dev, "cs", GPIOD_OUT_LOW);
 97		if (IS_ERR(gpio))
 98			return PTR_ERR(gpio);
 99
100		gpiod_set_value_cansleep(gpio, 1);
101		gpiod_put(gpio);
102
103		gpio = gpiod_get_optional(&pdev->dev, "reset", GPIOD_OUT_LOW);
104		if (IS_ERR(gpio))
105			return PTR_ERR(gpio);
106
107		if (gpio) {
108			gpiod_set_value_cansleep(gpio, 1);
109			gpiod_put(gpio);
110			usleep_range(10000, 11000);
111		}
112	}
113
114	if (pdev->vendor == PCI_VENDOR_ID_SYNOPSYS &&
115	    (pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 ||
116	     pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI ||
117	     pdev->device == PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31)) {
118
119		struct dwc3_platform_data pdata;
120
121		memset(&pdata, 0, sizeof(pdata));
122		pdata.usb3_lpm_capable = true;
123		pdata.has_lpm_erratum = true;
124		pdata.dis_enblslpm_quirk = true;
125
126		return platform_device_add_data(pci_get_drvdata(pdev), &pdata,
127						sizeof(pdata));
128	}
129
130	return 0;
131}
132
133static int dwc3_pci_probe(struct pci_dev *pci,
134		const struct pci_device_id *id)
135{
136	struct resource		res[2];
137	struct platform_device	*dwc3;
138	int			ret;
139	struct device		*dev = &pci->dev;
140
141	ret = pcim_enable_device(pci);
142	if (ret) {
143		dev_err(dev, "failed to enable pci device\n");
144		return -ENODEV;
145	}
146
147	pci_set_master(pci);
148
149	dwc3 = platform_device_alloc("dwc3", PLATFORM_DEVID_AUTO);
150	if (!dwc3) {
151		dev_err(dev, "couldn't allocate dwc3 device\n");
152		return -ENOMEM;
153	}
154
155	memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
156
157	res[0].start	= pci_resource_start(pci, 0);
158	res[0].end	= pci_resource_end(pci, 0);
159	res[0].name	= "dwc_usb3";
160	res[0].flags	= IORESOURCE_MEM;
161
162	res[1].start	= pci->irq;
163	res[1].name	= "dwc_usb3";
164	res[1].flags	= IORESOURCE_IRQ;
165
166	ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
167	if (ret) {
168		dev_err(dev, "couldn't add resources to dwc3 device\n");
169		return ret;
170	}
171
172	pci_set_drvdata(pci, dwc3);
173	ret = dwc3_pci_quirks(pci);
174	if (ret)
175		goto err;
176
177	dwc3->dev.parent = dev;
178	ACPI_COMPANION_SET(&dwc3->dev, ACPI_COMPANION(dev));
179
180	ret = platform_device_add(dwc3);
181	if (ret) {
182		dev_err(dev, "failed to register dwc3 device\n");
183		goto err;
184	}
185
186	return 0;
187err:
188	platform_device_put(dwc3);
189	return ret;
190}
191
192static void dwc3_pci_remove(struct pci_dev *pci)
193{
194	acpi_dev_remove_driver_gpios(ACPI_COMPANION(&pci->dev));
195	platform_device_unregister(pci_get_drvdata(pci));
196}
197
198static const struct pci_device_id dwc3_pci_id_table[] = {
199	{
200		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
201				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
202	},
203	{
204		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
205				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3_AXI),
206	},
207	{
208		PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
209				PCI_DEVICE_ID_SYNOPSYS_HAPSUSB31),
210	},
211	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BSW), },
212	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
213	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
214	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTLP), },
215	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_SPTH), },
216	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT), },
217	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BXT_M), },
218	{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_APL), },
219	{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_NL_USB), },
220	{  }	/* Terminating Entry */
221};
222MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
223
224static struct pci_driver dwc3_pci_driver = {
225	.name		= "dwc3-pci",
226	.id_table	= dwc3_pci_id_table,
227	.probe		= dwc3_pci_probe,
228	.remove		= dwc3_pci_remove,
229};
230
231MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
232MODULE_LICENSE("GPL v2");
233MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
234
235module_pci_driver(dwc3_pci_driver);