177 lines
4.2 KiB
C
177 lines
4.2 KiB
C
/*
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* ci13xxx_pci.c - MIPS USB IP core family device controller
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*
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* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
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*
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* Author: David Lopo
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/pci.h>
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#include "ci13xxx_udc.c"
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/* driver name */
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#define UDC_DRIVER_NAME "ci13xxx_pci"
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/******************************************************************************
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* PCI block
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*****************************************************************************/
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/**
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* ci13xxx_pci_irq: interrut handler
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* @irq: irq number
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* @pdev: USB Device Controller interrupt source
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*
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* This function returns IRQ_HANDLED if the IRQ has been handled
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* This is an ISR don't trace, use attribute interface instead
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*/
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static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
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{
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if (irq == 0) {
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dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
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return IRQ_HANDLED;
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}
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return udc_irq();
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}
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static struct ci13xxx_udc_driver ci13xxx_pci_udc_driver = {
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.name = UDC_DRIVER_NAME,
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};
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/**
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* ci13xxx_pci_probe: PCI probe
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* @pdev: USB device controller being probed
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* @id: PCI hotplug ID connecting controller to UDC framework
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*
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* This function returns an error code
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* Allocates basic PCI resources for this USB device controller, and then
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* invokes the udc_probe() method to start the UDC associated with it
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*/
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static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
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const struct pci_device_id *id)
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{
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void __iomem *regs = NULL;
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int retval = 0;
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if (id == NULL)
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return -EINVAL;
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retval = pci_enable_device(pdev);
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if (retval)
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goto done;
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if (!pdev->irq) {
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dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
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retval = -ENODEV;
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goto disable_device;
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}
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retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
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if (retval)
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goto disable_device;
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/* BAR 0 holds all the registers */
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regs = pci_iomap(pdev, 0, 0);
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if (!regs) {
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dev_err(&pdev->dev, "Error mapping memory!");
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retval = -EFAULT;
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goto release_regions;
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}
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pci_set_drvdata(pdev, (__force void *)regs);
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pci_set_master(pdev);
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pci_try_set_mwi(pdev);
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retval = udc_probe(&ci13xxx_pci_udc_driver, &pdev->dev, regs);
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if (retval)
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goto iounmap;
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/* our device does not have MSI capability */
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retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
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UDC_DRIVER_NAME, pdev);
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if (retval)
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goto gadget_remove;
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return 0;
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gadget_remove:
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udc_remove();
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iounmap:
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pci_iounmap(pdev, regs);
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release_regions:
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pci_release_regions(pdev);
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disable_device:
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pci_disable_device(pdev);
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done:
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return retval;
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}
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/**
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* ci13xxx_pci_remove: PCI remove
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* @pdev: USB Device Controller being removed
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*
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* Reverses the effect of ci13xxx_pci_probe(),
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* first invoking the udc_remove() and then releases
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* all PCI resources allocated for this USB device controller
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*/
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static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
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{
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free_irq(pdev->irq, pdev);
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udc_remove();
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pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
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pci_release_regions(pdev);
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pci_disable_device(pdev);
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}
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/**
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* PCI device table
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* PCI device structure
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*
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* Check "pci.h" for details
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*/
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static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
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{ PCI_DEVICE(0x153F, 0x1004) },
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{ PCI_DEVICE(0x153F, 0x1006) },
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{ 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
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};
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MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
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static struct pci_driver ci13xxx_pci_driver = {
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.name = UDC_DRIVER_NAME,
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.id_table = ci13xxx_pci_id_table,
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.probe = ci13xxx_pci_probe,
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.remove = __devexit_p(ci13xxx_pci_remove),
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};
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/**
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* ci13xxx_pci_init: module init
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*
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* Driver load
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*/
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static int __init ci13xxx_pci_init(void)
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{
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return pci_register_driver(&ci13xxx_pci_driver);
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}
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module_init(ci13xxx_pci_init);
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/**
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* ci13xxx_pci_exit: module exit
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*
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* Driver unload
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*/
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static void __exit ci13xxx_pci_exit(void)
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{
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pci_unregister_driver(&ci13xxx_pci_driver);
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}
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module_exit(ci13xxx_pci_exit);
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MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
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MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
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MODULE_LICENSE("GPL");
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MODULE_VERSION("June 2008");
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