2 * dwc3-pci.c - PCI Specific glue layer
4 * Copyright (C) 2010-2011 Texas Instruments Incorporated - http://www.ti.com
6 * Authors: Felipe Balbi <balbi@ti.com>,
7 * Sebastian Andrzej Siewior <bigeasy@linutronix.de>
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions, and the following disclaimer,
14 * without modification.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. The names of the above-listed copyright holders may not be used
19 * to endorse or promote products derived from this software without
20 * specific prior written permission.
22 * ALTERNATIVELY, this software may be distributed under the terms of the
23 * GNU General Public License ("GPL") version 2, as published by the Free
24 * Software Foundation.
26 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
27 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
28 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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39 #include <linux/kernel.h>
40 #include <linux/module.h>
41 #include <linux/slab.h>
42 #include <linux/pci.h>
43 #include <linux/platform_device.h>
45 /* FIXME define these in <linux/pci_ids.h> */
46 #define PCI_VENDOR_ID_SYNOPSYS 0x16c3
47 #define PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3 0xabcd
48 #define PCI_DEVICE_ID_INTEL_BYT 0x0f37
49 #define PCI_DEVICE_ID_INTEL_MRFLD 0x119e
51 #define DWC3_PCI_DEVS_POSSIBLE 32
55 struct platform_device *dwc3;
58 static DECLARE_BITMAP(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
60 static int dwc3_pci_get_device_id(struct dwc3_pci *glue)
65 id = find_first_zero_bit(dwc3_pci_devs, DWC3_PCI_DEVS_POSSIBLE);
66 if (id < DWC3_PCI_DEVS_POSSIBLE) {
69 old = test_and_set_bit(id, dwc3_pci_devs);
73 dev_err(glue->dev, "no space for new device\n");
80 static void dwc3_pci_put_device_id(struct dwc3_pci *glue, int id)
87 ret = test_bit(id, dwc3_pci_devs);
88 WARN(!ret, "Device: %s\nID %d not in use\n",
89 dev_driver_string(glue->dev), id);
90 clear_bit(id, dwc3_pci_devs);
93 static int __devinit dwc3_pci_probe(struct pci_dev *pci,
94 const struct pci_device_id *id)
96 struct resource res[2];
97 struct platform_device *dwc3;
98 struct dwc3_pci *glue;
102 glue = kzalloc(sizeof(*glue), GFP_KERNEL);
104 dev_err(&pci->dev, "not enough memory\n");
108 glue->dev = &pci->dev;
110 ret = pci_enable_device(pci);
112 dev_err(&pci->dev, "failed to enable pci device\n");
116 pci_set_power_state(pci, PCI_D0);
119 devid = dwc3_pci_get_device_id(glue);
123 dwc3 = platform_device_alloc("dwc3-pci", devid);
125 dev_err(&pci->dev, "couldn't allocate dwc3 device\n");
129 memset(res, 0x00, sizeof(struct resource) * ARRAY_SIZE(res));
131 res[0].start = pci_resource_start(pci, 0);
132 res[0].end = pci_resource_end(pci, 0);
133 res[0].name = "dwc_usb3";
134 res[0].flags = IORESOURCE_MEM;
136 res[1].start = pci->irq;
137 res[1].name = "dwc_usb3";
138 res[1].flags = IORESOURCE_IRQ;
140 ret = platform_device_add_resources(dwc3, res, ARRAY_SIZE(res));
142 dev_err(&pci->dev, "couldn't add resources to dwc3 device\n");
146 pci_set_drvdata(pci, glue);
148 dma_set_coherent_mask(&dwc3->dev, pci->dev.coherent_dma_mask);
150 dwc3->dev.dma_mask = pci->dev.dma_mask;
151 dwc3->dev.dma_parms = pci->dev.dma_parms;
152 dwc3->dev.parent = &pci->dev;
155 ret = platform_device_add(dwc3);
157 dev_err(&pci->dev, "failed to register dwc3 device\n");
164 pci_set_drvdata(pci, NULL);
165 platform_device_put(dwc3);
168 dwc3_pci_put_device_id(glue, devid);
171 pci_disable_device(pci);
180 static void __devexit dwc3_pci_remove(struct pci_dev *pci)
182 struct dwc3_pci *glue = pci_get_drvdata(pci);
184 dwc3_pci_put_device_id(glue, glue->dwc3->id);
185 platform_device_unregister(glue->dwc3);
186 pci_set_drvdata(pci, NULL);
187 pci_disable_device(pci);
191 static DEFINE_PCI_DEVICE_TABLE(dwc3_pci_id_table) = {
193 PCI_DEVICE(PCI_VENDOR_ID_SYNOPSYS,
194 PCI_DEVICE_ID_SYNOPSYS_HAPSUSB3),
196 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_BYT), },
197 { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_MRFLD), },
198 { } /* Terminating Entry */
200 MODULE_DEVICE_TABLE(pci, dwc3_pci_id_table);
202 static struct pci_driver dwc3_pci_driver = {
204 .id_table = dwc3_pci_id_table,
205 .probe = dwc3_pci_probe,
206 .remove = __devexit_p(dwc3_pci_remove),
209 MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
210 MODULE_LICENSE("Dual BSD/GPL");
211 MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
213 static int __devinit dwc3_pci_init(void)
215 return pci_register_driver(&dwc3_pci_driver);
217 module_init(dwc3_pci_init);
219 static void __exit dwc3_pci_exit(void)
221 pci_unregister_driver(&dwc3_pci_driver);
223 module_exit(dwc3_pci_exit);