tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ci13xxx_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
20/* driver name */
21#define UDC_DRIVER_NAME "ci13xxx_pci"
22
23/******************************************************************************
24 * PCI block
25 *****************************************************************************/
26struct ci13xxx_udc_driver pci_driver = {
27 .name = UDC_DRIVER_NAME,
28 .capoffset = DEF_CAPOFFSET,
29};
30
31struct ci13xxx_udc_driver langwell_pci_driver = {
32 .name = UDC_DRIVER_NAME,
33 .capoffset = 0,
34};
35
36struct ci13xxx_udc_driver penwell_pci_driver = {
37 .name = UDC_DRIVER_NAME,
38 .capoffset = 0,
39 .power_budget = 200,
40};
41
42/**
43 * ci13xxx_pci_probe: PCI probe
44 * @pdev: USB device controller being probed
45 * @id: PCI hotplug ID connecting controller to UDC framework
46 *
47 * This function returns an error code
48 * Allocates basic PCI resources for this USB device controller, and then
49 * invokes the udc_probe() method to start the UDC associated with it
50 */
51static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
52 const struct pci_device_id *id)
53{
54 struct ci13xxx_udc_driver *driver = (void *)id->driver_data;
55 struct platform_device *plat_ci;
56 struct resource res[3];
57 int retval = 0, nres = 2;
58
59 if (!driver) {
60 dev_err(&pdev->dev, "device doesn't provide driver data\n");
61 return -ENODEV;
62 }
63
64 retval = pci_enable_device(pdev);
65 if (retval)
66 goto done;
67
68 if (!pdev->irq) {
69 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
70 retval = -ENODEV;
71 goto disable_device;
72 }
73
74 pci_set_power_state(pdev, PCI_D0);
75 pci_set_master(pdev);
76 pci_try_set_mwi(pdev);
77
78 plat_ci = platform_device_alloc("ci_hdrc", -1);
79 if (!plat_ci) {
80 dev_err(&pdev->dev, "can't allocate ci_hdrc platform device\n");
81 retval = -ENOMEM;
82 goto disable_device;
83 }
84
85 memset(res, 0, sizeof(res));
86 res[0].start = pci_resource_start(pdev, 0);
87 res[0].end = pci_resource_end(pdev, 0);
88 res[0].flags = IORESOURCE_MEM;
89 res[1].start = pdev->irq;
90 res[1].flags = IORESOURCE_IRQ;
91
92 retval = platform_device_add_resources(plat_ci, res, nres);
93 if (retval) {
94 dev_err(&pdev->dev, "can't add resources to platform device\n");
95 goto put_platform;
96 }
97
98 retval = platform_device_add_data(plat_ci, driver, sizeof(*driver));
99 if (retval)
100 goto put_platform;
101
102 dma_set_coherent_mask(&plat_ci->dev, pdev->dev.coherent_dma_mask);
103 plat_ci->dev.dma_mask = pdev->dev.dma_mask;
104 plat_ci->dev.dma_parms = pdev->dev.dma_parms;
105 plat_ci->dev.parent = &pdev->dev;
106
107 pci_set_drvdata(pdev, plat_ci);
108
109 retval = platform_device_add(plat_ci);
110 if (retval)
111 goto put_platform;
112
113 return 0;
114
115 put_platform:
116 pci_set_drvdata(pdev, NULL);
117 platform_device_put(plat_ci);
118 disable_device:
119 pci_disable_device(pdev);
120 done:
121 return retval;
122}
123
124/**
125 * ci13xxx_pci_remove: PCI remove
126 * @pdev: USB Device Controller being removed
127 *
128 * Reverses the effect of ci13xxx_pci_probe(),
129 * first invoking the udc_remove() and then releases
130 * all PCI resources allocated for this USB device controller
131 */
132static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
133{
134 struct platform_device *plat_ci = pci_get_drvdata(pdev);
135
136 platform_device_unregister(plat_ci);
137 pci_set_drvdata(pdev, NULL);
138 pci_disable_device(pdev);
139}
140
141/**
142 * PCI device table
143 * PCI device structure
144 *
145 * Check "pci.h" for details
146 */
147static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
148 {
149 PCI_DEVICE(0x153F, 0x1004),
150 .driver_data = (kernel_ulong_t)&pci_driver,
151 },
152 {
153 PCI_DEVICE(0x153F, 0x1006),
154 .driver_data = (kernel_ulong_t)&pci_driver,
155 },
156 {
157 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
158 .driver_data = (kernel_ulong_t)&langwell_pci_driver,
159 },
160 {
161 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
162 .driver_data = (kernel_ulong_t)&penwell_pci_driver,
163 },
164 { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
165};
166MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
167
168static struct pci_driver ci13xxx_pci_driver = {
169 .name = UDC_DRIVER_NAME,
170 .id_table = ci13xxx_pci_id_table,
171 .probe = ci13xxx_pci_probe,
172 .remove = __devexit_p(ci13xxx_pci_remove),
173};
174
175module_pci_driver(ci13xxx_pci_driver);
176
177MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
178MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
179MODULE_LICENSE("GPL");
180MODULE_VERSION("June 2008");