1/*
2 * ci_hdrc_pci.c - MIPS USB IP core family device controller
3 *
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
5 *
6 * Author: David Lopo
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 */
12
13#include <linux/platform_device.h>
14#include <linux/module.h>
15#include <linux/pci.h>
16#include <linux/interrupt.h>
17#include <linux/usb/gadget.h>
18#include <linux/usb/chipidea.h>
19#include <linux/usb/usb_phy_generic.h>
20
21/* driver name */
22#define UDC_DRIVER_NAME   "ci_hdrc_pci"
23
24struct ci_hdrc_pci {
25	struct platform_device	*ci;
26	struct platform_device	*phy;
27};
28
29/******************************************************************************
30 * PCI block
31 *****************************************************************************/
32static struct ci_hdrc_platform_data pci_platdata = {
33	.name		= UDC_DRIVER_NAME,
34	.capoffset	= DEF_CAPOFFSET,
35};
36
37static struct ci_hdrc_platform_data langwell_pci_platdata = {
38	.name		= UDC_DRIVER_NAME,
39	.capoffset	= 0,
40};
41
42static struct ci_hdrc_platform_data penwell_pci_platdata = {
43	.name		= UDC_DRIVER_NAME,
44	.capoffset	= 0,
45	.power_budget	= 200,
46};
47
48/**
49 * ci_hdrc_pci_probe: PCI probe
50 * @pdev: USB device controller being probed
51 * @id:   PCI hotplug ID connecting controller to UDC framework
52 *
53 * This function returns an error code
54 * Allocates basic PCI resources for this USB device controller, and then
55 * invokes the udc_probe() method to start the UDC associated with it
56 */
57static int ci_hdrc_pci_probe(struct pci_dev *pdev,
58				       const struct pci_device_id *id)
59{
60	struct ci_hdrc_platform_data *platdata = (void *)id->driver_data;
61	struct ci_hdrc_pci *ci;
62	struct resource res[3];
63	int retval = 0, nres = 2;
64
65	if (!platdata) {
66		dev_err(&pdev->dev, "device doesn't provide driver data\n");
67		return -ENODEV;
68	}
69
70	ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
71	if (!ci)
72		return -ENOMEM;
73
74	retval = pcim_enable_device(pdev);
75	if (retval)
76		return retval;
77
78	if (!pdev->irq) {
79		dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
80		return -ENODEV;
81	}
82
83	pci_set_master(pdev);
84	pci_try_set_mwi(pdev);
85
86	/* register a nop PHY */
87	ci->phy = usb_phy_generic_register();
88	if (!ci->phy)
89		return -ENOMEM;
90
91	memset(res, 0, sizeof(res));
92	res[0].start	= pci_resource_start(pdev, 0);
93	res[0].end	= pci_resource_end(pdev, 0);
94	res[0].flags	= IORESOURCE_MEM;
95	res[1].start	= pdev->irq;
96	res[1].flags	= IORESOURCE_IRQ;
97
98	ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
99	if (IS_ERR(ci->ci)) {
100		dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
101		usb_phy_generic_unregister(ci->phy);
102		return PTR_ERR(ci->ci);
103	}
104
105	pci_set_drvdata(pdev, ci);
106
107	return 0;
108}
109
110/**
111 * ci_hdrc_pci_remove: PCI remove
112 * @pdev: USB Device Controller being removed
113 *
114 * Reverses the effect of ci_hdrc_pci_probe(),
115 * first invoking the udc_remove() and then releases
116 * all PCI resources allocated for this USB device controller
117 */
118static void ci_hdrc_pci_remove(struct pci_dev *pdev)
119{
120	struct ci_hdrc_pci *ci = pci_get_drvdata(pdev);
121
122	ci_hdrc_remove_device(ci->ci);
123	usb_phy_generic_unregister(ci->phy);
124}
125
126/**
127 * PCI device table
128 * PCI device structure
129 *
130 * Check "pci.h" for details
131 *
132 * Note: ehci-pci driver may try to probe the device first. You have to add an
133 * ID to the bypass_pci_id_table in ehci-pci driver to prevent this.
134 */
135static const struct pci_device_id ci_hdrc_pci_id_table[] = {
136	{
137		PCI_DEVICE(0x153F, 0x1004),
138		.driver_data = (kernel_ulong_t)&pci_platdata,
139	},
140	{
141		PCI_DEVICE(0x153F, 0x1006),
142		.driver_data = (kernel_ulong_t)&pci_platdata,
143	},
144	{
145		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
146		.driver_data = (kernel_ulong_t)&langwell_pci_platdata,
147	},
148	{
149		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
150		.driver_data = (kernel_ulong_t)&penwell_pci_platdata,
151	},
152	{
153		/* Intel Clovertrail */
154		PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe006),
155		.driver_data = (kernel_ulong_t)&penwell_pci_platdata,
156	},
157	{ 0 } /* end: all zeroes */
158};
159MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
160
161static struct pci_driver ci_hdrc_pci_driver = {
162	.name         =	UDC_DRIVER_NAME,
163	.id_table     =	ci_hdrc_pci_id_table,
164	.probe        =	ci_hdrc_pci_probe,
165	.remove       =	ci_hdrc_pci_remove,
166};
167
168module_pci_driver(ci_hdrc_pci_driver);
169
170MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
171MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
172MODULE_LICENSE("GPL");
173MODULE_VERSION("June 2008");
174MODULE_ALIAS("platform:ci13xxx_pci");
175