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 
24 struct ci_hdrc_pci {
25 	struct platform_device	*ci;
26 	struct platform_device	*phy;
27 };
28 
29 /******************************************************************************
30  * PCI block
31  *****************************************************************************/
32 static struct ci_hdrc_platform_data pci_platdata = {
33 	.name		= UDC_DRIVER_NAME,
34 	.capoffset	= DEF_CAPOFFSET,
35 };
36 
37 static struct ci_hdrc_platform_data langwell_pci_platdata = {
38 	.name		= UDC_DRIVER_NAME,
39 	.capoffset	= 0,
40 };
41 
42 static 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  */
57 static 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  */
118 static 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  */
135 static 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 };
159 MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
160 
161 static 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 
168 module_pci_driver(ci_hdrc_pci_driver);
169 
170 MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
171 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
172 MODULE_LICENSE("GPL");
173 MODULE_ALIAS("platform:ci13xxx_pci");
174