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