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 *****************************************************************************/
26 static struct ci13xxx_platform_data pci_platdata = {
27 .name = UDC_DRIVER_NAME,
28 .capoffset = DEF_CAPOFFSET,
29 };
30
31 static struct ci13xxx_platform_data langwell_pci_platdata = {
32 .name = UDC_DRIVER_NAME,
33 .capoffset = 0,
34 };
35
36 static struct ci13xxx_platform_data penwell_pci_platdata = {
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 */
ci13xxx_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)51 static int ci13xxx_pci_probe(struct pci_dev *pdev,
52 const struct pci_device_id *id)
53 {
54 struct ci13xxx_platform_data *platdata = (void *)id->driver_data;
55 struct platform_device *plat_ci;
56 struct resource res[3];
57 int retval = 0, nres = 2;
58
59 if (!platdata) {
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 memset(res, 0, sizeof(res));
79 res[0].start = pci_resource_start(pdev, 0);
80 res[0].end = pci_resource_end(pdev, 0);
81 res[0].flags = IORESOURCE_MEM;
82 res[1].start = pdev->irq;
83 res[1].flags = IORESOURCE_IRQ;
84
85 plat_ci = ci13xxx_add_device(&pdev->dev, res, nres, platdata);
86 if (IS_ERR(plat_ci)) {
87 dev_err(&pdev->dev, "ci13xxx_add_device failed!\n");
88 retval = PTR_ERR(plat_ci);
89 goto disable_device;
90 }
91
92 pci_set_drvdata(pdev, plat_ci);
93
94 return 0;
95
96 disable_device:
97 pci_disable_device(pdev);
98 done:
99 return retval;
100 }
101
102 /**
103 * ci13xxx_pci_remove: PCI remove
104 * @pdev: USB Device Controller being removed
105 *
106 * Reverses the effect of ci13xxx_pci_probe(),
107 * first invoking the udc_remove() and then releases
108 * all PCI resources allocated for this USB device controller
109 */
ci13xxx_pci_remove(struct pci_dev * pdev)110 static void ci13xxx_pci_remove(struct pci_dev *pdev)
111 {
112 struct platform_device *plat_ci = pci_get_drvdata(pdev);
113
114 ci13xxx_remove_device(plat_ci);
115 pci_set_drvdata(pdev, NULL);
116 pci_disable_device(pdev);
117 }
118
119 /**
120 * PCI device table
121 * PCI device structure
122 *
123 * Check "pci.h" for details
124 */
125 static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
126 {
127 PCI_DEVICE(0x153F, 0x1004),
128 .driver_data = (kernel_ulong_t)&pci_platdata,
129 },
130 {
131 PCI_DEVICE(0x153F, 0x1006),
132 .driver_data = (kernel_ulong_t)&pci_platdata,
133 },
134 {
135 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
136 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
137 },
138 {
139 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
140 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
141 },
142 { 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
143 };
144 MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
145
146 static struct pci_driver ci13xxx_pci_driver = {
147 .name = UDC_DRIVER_NAME,
148 .id_table = ci13xxx_pci_id_table,
149 .probe = ci13xxx_pci_probe,
150 .remove = ci13xxx_pci_remove,
151 };
152
153 module_pci_driver(ci13xxx_pci_driver);
154
155 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
156 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
157 MODULE_LICENSE("GPL");
158 MODULE_VERSION("June 2008");
159