f01ef5748f
Introduces ci13xxx_udc_driver struct for bus glue drivers to hint ci13xxx_udc core about their special requirements. The flags include avoiding hardware register access when controller is not in peripheral mode, enabling pull-up upon VBUS, disabling streaming mode and dependency on transceiver driver. Initialize gadget_ops in udc_probe so that transceiver can notify VBUS presence even when no gadget driver is bounded. A notify_event callback is embedded in the same struct. This patch implements two events called CONTROLLER_RESET_EVENT and CONTROLLER_STOPPED_EVENT to notify the bus glue driver after resetting and stopping the controller for performing SoC specific quirks. Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
176 lines
4.2 KiB
C
176 lines
4.2 KiB
C
/*
|
|
* 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");
|