[linux-2.6-block.git] / drivers / usb / gadget / ci13xxx_pci.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");
Commit	Line	Data
409a15da PK	1	/*
	2	* ci13xxx_pci.c - MIPS USB IP core family device controller
	3	*
	4	* Copyright (C) 2008 Chipidea - MIPS Technologies, Inc. All rights reserved.
	5	*
	6	* Author: David Lopo
	7	*
	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.
	11	*/
	12
	13	#include <linux/module.h>
	14	#include <linux/pci.h>
	15
	16	#include "ci13xxx_udc.c"
	17
	18	/* driver name */
	19	#define UDC_DRIVER_NAME "ci13xxx_pci"
	20
	21	/******************************************************************************
	22	* PCI block
	23	*****************************************************************************/
	24	/**
	25	* ci13xxx_pci_irq: interrut handler
	26	* @irq: irq number
	27	* @pdev: USB Device Controller interrupt source
	28	*
	29	* This function returns IRQ_HANDLED if the IRQ has been handled
	30	* This is an ISR don't trace, use attribute interface instead
	31	*/
	32	static irqreturn_t ci13xxx_pci_irq(int irq, void *pdev)
	33	{
	34	if (irq == 0) {
	35	dev_err(&((struct pci_dev *)pdev)->dev, "Invalid IRQ0 usage!");
	36	return IRQ_HANDLED;
	37	}
	38	return udc_irq();
	39	}
	40
f01ef574 PK	41	static struct ci13xxx_udc_driver ci13xxx_pci_udc_driver = {
	42	.name = UDC_DRIVER_NAME,
	43	};
	44
409a15da PK	45	/**
	46	* ci13xxx_pci_probe: PCI probe
	47	* @pdev: USB device controller being probed
	48	* @id: PCI hotplug ID connecting controller to UDC framework
	49	*
	50	* This function returns an error code
	51	* Allocates basic PCI resources for this USB device controller, and then
	52	* invokes the udc_probe() method to start the UDC associated with it
	53	*/
	54	static int __devinit ci13xxx_pci_probe(struct pci_dev *pdev,
	55	const struct pci_device_id *id)
	56	{
	57	void __iomem *regs = NULL;
	58	int retval = 0;
	59
	60	if (id == NULL)
	61	return -EINVAL;
	62
	63	retval = pci_enable_device(pdev);
	64	if (retval)
	65	goto done;
	66
	67	if (!pdev->irq) {
	68	dev_err(&pdev->dev, "No IRQ, check BIOS/PCI setup!");
	69	retval = -ENODEV;
	70	goto disable_device;
	71	}
	72
	73	retval = pci_request_regions(pdev, UDC_DRIVER_NAME);
	74	if (retval)
	75	goto disable_device;
	76
	77	/* BAR 0 holds all the registers */
	78	regs = pci_iomap(pdev, 0, 0);
	79	if (!regs) {
	80	dev_err(&pdev->dev, "Error mapping memory!");
	81	retval = -EFAULT;
	82	goto release_regions;
	83	}
	84	pci_set_drvdata(pdev, (__force void *)regs);
	85
	86	pci_set_master(pdev);
	87	pci_try_set_mwi(pdev);
	88
f01ef574	89	retval = udc_probe(&ci13xxx_pci_udc_driver, &pdev->dev, regs);
409a15da PK	90	if (retval)
	91	goto iounmap;
	92
	93	/* our device does not have MSI capability */
	94
	95	retval = request_irq(pdev->irq, ci13xxx_pci_irq, IRQF_SHARED,
	96	UDC_DRIVER_NAME, pdev);
	97	if (retval)
	98	goto gadget_remove;
	99
	100	return 0;
	101
	102	gadget_remove:
	103	udc_remove();
	104	iounmap:
	105	pci_iounmap(pdev, regs);
	106	release_regions:
	107	pci_release_regions(pdev);
	108	disable_device:
	109	pci_disable_device(pdev);
	110	done:
	111	return retval;
	112	}
	113
	114	/**
	115	* ci13xxx_pci_remove: PCI remove
	116	* @pdev: USB Device Controller being removed
	117	*
	118	* Reverses the effect of ci13xxx_pci_probe(),
	119	* first invoking the udc_remove() and then releases
	120	* all PCI resources allocated for this USB device controller
	121	*/
	122	static void __devexit ci13xxx_pci_remove(struct pci_dev *pdev)
	123	{
	124	free_irq(pdev->irq, pdev);
	125	udc_remove();
	126	pci_iounmap(pdev, (__force void __iomem *)pci_get_drvdata(pdev));
	127	pci_release_regions(pdev);
	128	pci_disable_device(pdev);
	129	}
	130
	131	/**
	132	* PCI device table
	133	* PCI device structure
	134	*
	135	* Check "pci.h" for details
	136	*/
	137	static DEFINE_PCI_DEVICE_TABLE(ci13xxx_pci_id_table) = {
	138	{ PCI_DEVICE(0x153F, 0x1004) },
	139	{ PCI_DEVICE(0x153F, 0x1006) },
	140	{ 0, 0, 0, 0, 0, 0, 0 /* end: all zeroes */ }
	141	};
	142	MODULE_DEVICE_TABLE(pci, ci13xxx_pci_id_table);
	143
	144	static struct pci_driver ci13xxx_pci_driver = {
	145	.name = UDC_DRIVER_NAME,
	146	.id_table = ci13xxx_pci_id_table,
	147	.probe = ci13xxx_pci_probe,
	148	.remove = __devexit_p(ci13xxx_pci_remove),
	149	};
	150
	151	/**
	152	* ci13xxx_pci_init: module init
	153	*
154	* Driver load
155	*/
156	static int __init ci13xxx_pci_init(void)
157	{
158	return pci_register_driver(&ci13xxx_pci_driver);
159	}
160	module_init(ci13xxx_pci_init);
161
162	/**
163	* ci13xxx_pci_exit: module exit
164	*
165	* Driver unload
166	*/
167	static void __exit ci13xxx_pci_exit(void)
168	{
169	pci_unregister_driver(&ci13xxx_pci_driver);
170	}
171	module_exit(ci13xxx_pci_exit);
172
173	MODULE_AUTHOR("MIPS - David Lopo <dlopo@chipidea.mips.com>");
174	MODULE_DESCRIPTION("MIPS CI13XXX USB Peripheral Controller");
175	MODULE_LICENSE("GPL");
176	MODULE_VERSION("June 2008");