Loading...
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 (IS_ERR(ci->phy))
89 return PTR_ERR(ci->phy);
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_VDEVICE(INTEL, 0x0811),
146 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
147 },
148 {
149 PCI_VDEVICE(INTEL, 0x0829),
150 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
151 },
152 {
153 /* Intel Clovertrail */
154 PCI_VDEVICE(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");
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
20/* driver name */
21#define UDC_DRIVER_NAME "ci_hdrc_pci"
22
23/******************************************************************************
24 * PCI block
25 *****************************************************************************/
26static struct ci_hdrc_platform_data pci_platdata = {
27 .name = UDC_DRIVER_NAME,
28 .capoffset = DEF_CAPOFFSET,
29};
30
31static struct ci_hdrc_platform_data langwell_pci_platdata = {
32 .name = UDC_DRIVER_NAME,
33 .capoffset = 0,
34};
35
36static struct ci_hdrc_platform_data penwell_pci_platdata = {
37 .name = UDC_DRIVER_NAME,
38 .capoffset = 0,
39 .power_budget = 200,
40};
41
42/**
43 * ci_hdrc_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 ci_hdrc_pci_probe(struct pci_dev *pdev,
52 const struct pci_device_id *id)
53{
54 struct ci_hdrc_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 = pcim_enable_device(pdev);
65 if (retval)
66 return retval;
67
68 if (!pdev->irq) {
69 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
70 return -ENODEV;
71 }
72
73 pci_set_master(pdev);
74 pci_try_set_mwi(pdev);
75
76 memset(res, 0, sizeof(res));
77 res[0].start = pci_resource_start(pdev, 0);
78 res[0].end = pci_resource_end(pdev, 0);
79 res[0].flags = IORESOURCE_MEM;
80 res[1].start = pdev->irq;
81 res[1].flags = IORESOURCE_IRQ;
82
83 plat_ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
84 if (IS_ERR(plat_ci)) {
85 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
86 return PTR_ERR(plat_ci);
87 }
88
89 pci_set_drvdata(pdev, plat_ci);
90
91 return 0;
92}
93
94/**
95 * ci_hdrc_pci_remove: PCI remove
96 * @pdev: USB Device Controller being removed
97 *
98 * Reverses the effect of ci_hdrc_pci_probe(),
99 * first invoking the udc_remove() and then releases
100 * all PCI resources allocated for this USB device controller
101 */
102static void ci_hdrc_pci_remove(struct pci_dev *pdev)
103{
104 struct platform_device *plat_ci = pci_get_drvdata(pdev);
105
106 ci_hdrc_remove_device(plat_ci);
107}
108
109/**
110 * PCI device table
111 * PCI device structure
112 *
113 * Check "pci.h" for details
114 */
115static const struct pci_device_id ci_hdrc_pci_id_table[] = {
116 {
117 PCI_DEVICE(0x153F, 0x1004),
118 .driver_data = (kernel_ulong_t)&pci_platdata,
119 },
120 {
121 PCI_DEVICE(0x153F, 0x1006),
122 .driver_data = (kernel_ulong_t)&pci_platdata,
123 },
124 {
125 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0811),
126 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
127 },
128 {
129 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0829),
130 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
131 },
132 {
133 /* Intel Clovertrail */
134 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xe006),
135 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
136 },
137 { 0 } /* end: all zeroes */
138};
139MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
140
141static struct pci_driver ci_hdrc_pci_driver = {
142 .name = UDC_DRIVER_NAME,
143 .id_table = ci_hdrc_pci_id_table,
144 .probe = ci_hdrc_pci_probe,
145 .remove = ci_hdrc_pci_remove,
146};
147
148module_pci_driver(ci_hdrc_pci_driver);
149
150MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
151MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
152MODULE_LICENSE("GPL");
153MODULE_VERSION("June 2008");
154MODULE_ALIAS("platform:ci13xxx_pci");