2 * ci_hdrc_pci.c - MIPS USB IP core family device controller
4 * Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
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.
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>
22 #define UDC_DRIVER_NAME "ci_hdrc_pci"
25 struct platform_device *ci;
26 struct platform_device *phy;
29 /******************************************************************************
31 *****************************************************************************/
32 static struct ci_hdrc_platform_data pci_platdata = {
33 .name = UDC_DRIVER_NAME,
34 .capoffset = DEF_CAPOFFSET,
37 static struct ci_hdrc_platform_data langwell_pci_platdata = {
38 .name = UDC_DRIVER_NAME,
42 static struct ci_hdrc_platform_data penwell_pci_platdata = {
43 .name = UDC_DRIVER_NAME,
49 * ci_hdrc_pci_probe: PCI probe
50 * @pdev: USB device controller being probed
51 * @id: PCI hotplug ID connecting controller to UDC framework
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
57 static int ci_hdrc_pci_probe(struct pci_dev *pdev,
58 const struct pci_device_id *id)
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;
66 dev_err(&pdev->dev, "device doesn't provide driver data\n");
70 ci = devm_kzalloc(&pdev->dev, sizeof(*ci), GFP_KERNEL);
74 retval = pcim_enable_device(pdev);
79 dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
84 pci_try_set_mwi(pdev);
86 /* register a nop PHY */
87 ci->phy = usb_phy_generic_register();
89 return PTR_ERR(ci->phy);
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;
98 ci->ci = ci_hdrc_add_device(&pdev->dev, res, nres, platdata);
100 dev_err(&pdev->dev, "ci_hdrc_add_device failed!\n");
101 usb_phy_generic_unregister(ci->phy);
102 return PTR_ERR(ci->ci);
105 pci_set_drvdata(pdev, ci);
111 * ci_hdrc_pci_remove: PCI remove
112 * @pdev: USB Device Controller being removed
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
118 static void ci_hdrc_pci_remove(struct pci_dev *pdev)
120 struct ci_hdrc_pci *ci = pci_get_drvdata(pdev);
122 ci_hdrc_remove_device(ci->ci);
123 usb_phy_generic_unregister(ci->phy);
128 * PCI device structure
130 * Check "pci.h" for details
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.
135 static const struct pci_device_id ci_hdrc_pci_id_table[] = {
137 PCI_DEVICE(0x153F, 0x1004),
138 .driver_data = (kernel_ulong_t)&pci_platdata,
141 PCI_DEVICE(0x153F, 0x1006),
142 .driver_data = (kernel_ulong_t)&pci_platdata,
145 PCI_VDEVICE(INTEL, 0x0811),
146 .driver_data = (kernel_ulong_t)&langwell_pci_platdata,
149 PCI_VDEVICE(INTEL, 0x0829),
150 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
153 /* Intel Clovertrail */
154 PCI_VDEVICE(INTEL, 0xe006),
155 .driver_data = (kernel_ulong_t)&penwell_pci_platdata,
157 { 0 } /* end: all zeroes */
159 MODULE_DEVICE_TABLE(pci, ci_hdrc_pci_id_table);
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,
168 module_pci_driver(ci_hdrc_pci_driver);
171 MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
172 MODULE_LICENSE("GPL");
173 MODULE_VERSION("June 2008");
174 MODULE_ALIAS("platform:ci13xxx_pci");