1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * ci_hdrc_pci.c - MIPS USB IP core family device controller
4 *
5 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
6 *
7 * Author: David Lopo
8 */
9
10 #include <linux/platform_device.h>
11 #include <linux/module.h>
12 #include <linux/pci.h>
13 #include <linux/interrupt.h>
14 #include <linux/usb/gadget.h>
15 #include <linux/usb/chipidea.h>
16 #include <linux/usb/usb_phy_generic.h>
17
18 /* driver name */
19 #define UDC_DRIVER_NAME "ci_hdrc_pci"
20
21 struct ci_hdrc_pci {
22 struct platform_device *ci;
23 struct platform_device *phy;
24 };
25
26 /******************************************************************************
27 * PCI block
28 *****************************************************************************/
29 static struct ci_hdrc_platform_data pci_platdata = {
30 .name = UDC_DRIVER_NAME,
31 .capoffset = DEF_CAPOFFSET,
32 };
33
34 static struct ci_hdrc_platform_data langwell_pci_platdata = {
35 .name = UDC_DRIVER_NAME,
36 .capoffset = 0,
37 };
38
39 static struct ci_hdrc_platform_data penwell_pci_platdata = {
40 .name = UDC_DRIVER_NAME,
41 .capoffset = 0,
42 .power_budget = 200,
43 };
44
45 /**
46 * ci_hdrc_pci_probe: PCI probe
47 * @pdev: USB device controller being probed
48 * @id: PCI hotplug ID connecting controller to UDC framework
49 *
50 * This function returns an error code
51 * Allocates basic PCI resources for this USB device controller, and then
52 * invokes the udc_probe() method to start the UDC associated with it
53 */
ci_hdrc_pci_probe(struct pci_dev * pdev,const struct pci_device_id * id)54 static int ci_hdrc_pci_probe(struct pci_dev *pdev,
55 const struct pci_device_id *id)
56 {
57 struct ci_hdrc_platform_data *platdata = (void *)id->driver_data;
58 struct ci_hdrc_pci *ci;
59 struct resource res[3];
60 int retval = 0, nres = 2;
61
62 if (!platdata) {
63 dev_err(&pdev->dev, "device doesn't provide driver data\n");
64 return -ENODEV;
65 }
66
67 ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
68 if (!ci)
69 return -ENOMEM;
70
71 retval = pcim_enable_device(pdev);
72 if (retval)
73 return retval;
74
75 if (!pdev->irq) {
76 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
77 return -ENODEV;
78 }
79
80 pci_set_master(pdev);
81 pci_try_set_mwi(pdev);
82
83 /* register a nop PHY */
84 ci->phy = usb_phy_generic_register();
85 if (IS_ERR(ci->phy))
86 return PTR_ERR(ci->phy);
87
88 memset(res, 0, sizeof(res));
89 res[0].start = pci_resource_start(pdev, 0);
90 res[0].end = pci_resource_end(pdev, 0);
91 res[0].flags = IORESOURCE_MEM;
92 res[1].start = pdev->irq;
93 res[1].flags = IORESOURCE_IRQ;
94
95 ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
96 if (IS_ERR(ci->ci)) {
97 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
98 usb_phy_generic_unregister(ci->phy);
99 return PTR_ERR(ci->ci);
100 }
101
102 pci_set_drvdata(pdev, ci);
103
104 return 0;
105 }
106
107 /**
108 * ci_hdrc_pci_remove: PCI remove
109 * @pdev: USB Device Controller being removed
110 *
111 * Reverses the effect of ci_hdrc_pci_probe(),
112 * first invoking the udc_remove() and then releases
113 * all PCI resources allocated for this USB device controller
114 */
ci_hdrc_pci_remove(struct pci_dev * pdev)115 static void ci_hdrc_pci_remove(struct pci_dev *pdev)
116 {
117 struct ci_hdrc_pci *ci = pci_get_drvdata(pdev);
118
119 ci_hdrc_remove_device(ci->ci);
120 usb_phy_generic_unregister(ci->phy);
121 }
122
123 /**
124 * PCI device table
125 * PCI device structure
126 *
127 * Check "pci.h" for details
128 *
129 * Note: ehci-pci driver may try to probe the device first. You have to add an
130 * ID to the bypass_pci_id_table in ehci-pci driver to prevent this.
131 */
132 static const struct pci_device_id ci_hdrc_pci_id_table[] = {
133 {
134 PCI_DEVICE(0x153F, 0x1004),
135 .driver_data = (kernel_ulong_t)&pci_platdata,
136 },
137 {
138 PCI_DEVICE(0x153F, 0x1006),
139 .driver_data = (kernel_ulong_t)&pci_platdata,
140 },
141 {
142 PCI_VDEVICE(INTEL, 0x0811),
143 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
144 },
145 {
146 PCI_VDEVICE(INTEL, 0x0829),
147 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
148 },
149 {
150 /* Intel Clovertrail */
151 PCI_VDEVICE(INTEL, 0xe006),
152 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
153 },
154 { 0 } /* end: all zeroes */
155 };
156 MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
157
158 static struct pci_driver ci_hdrc_pci_driver = {
159 .name = UDC_DRIVER_NAME,
160 .id_table = ci_hdrc_pci_id_table,
161 .probe = ci_hdrc_pci_probe,
162 .remove = ci_hdrc_pci_remove,
163 };
164
165 module_pci_driver(ci_hdrc_pci_driver);
166
167 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
168 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
169 MODULE_LICENSE("GPL");
170 MODULE_ALIAS("platform:ci13xxx_pci");
171
