[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / uio / uio_cif.c

/*
 * UIO Hilscher CIF card driver
 *
 * (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
 * Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
 *
 * Licensed under GPL version 2 only.
 *
 */

#include <linux/device.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/uio_driver.h>

#include <asm/io.h>

#define PLX9030_INTCSR		0x4C
#define INTSCR_INT1_ENABLE	0x01
#define INTSCR_INT1_STATUS	0x04
#define INT1_ENABLED_AND_ACTIVE	(INTSCR_INT1_ENABLE | INTSCR_INT1_STATUS)

#define PCI_SUBVENDOR_ID_PEP	0x1518
#define CIF_SUBDEVICE_PROFIBUS	0x430
#define CIF_SUBDEVICE_DEVICENET	0x432


static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
{
	void __iomem *plx_intscr = dev_info->mem[0].internal_addr
					+ PLX9030_INTCSR;

	if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
	    != INT1_ENABLED_AND_ACTIVE)
		return IRQ_NONE;

	/* Disable interrupt */
	iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
	return IRQ_HANDLED;
}

static int hilscher_pci_probe(struct pci_dev *dev,
					const struct pci_device_id *id)
{
	struct uio_info *info;

	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
	if (!info)
		return -ENOMEM;

	if (pci_enable_device(dev))
		goto out_free;

	if (pci_request_regions(dev, "hilscher"))
		goto out_disable;

	info->mem[0].addr = pci_resource_start(dev, 0);
	if (!info->mem[0].addr)
		goto out_release;
	info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
	if (!info->mem[0].internal_addr)
		goto out_release;

	info->mem[0].size = pci_resource_len(dev, 0);
	info->mem[0].memtype = UIO_MEM_PHYS;
	info->mem[1].addr = pci_resource_start(dev, 2);
	info->mem[1].size = pci_resource_len(dev, 2);
	info->mem[1].memtype = UIO_MEM_PHYS;
	switch (id->subdevice) {
		case CIF_SUBDEVICE_PROFIBUS:
			info->name = "CIF_Profibus";
			break;
		case CIF_SUBDEVICE_DEVICENET:
			info->name = "CIF_Devicenet";
			break;
		default:
			info->name = "CIF_???";
	}
	info->version = "0.0.1";
	info->irq = dev->irq;
	info->irq_flags = IRQF_SHARED;
	info->handler = hilscher_handler;

	if (uio_register_device(&dev->dev, info))
		goto out_unmap;

	pci_set_drvdata(dev, info);

	return 0;
out_unmap:
	iounmap(info->mem[0].internal_addr);
out_release:
	pci_release_regions(dev);
out_disable:
	pci_disable_device(dev);
out_free:
	kfree (info);
	return -ENODEV;
}

static void hilscher_pci_remove(struct pci_dev *dev)
{
	struct uio_info *info = pci_get_drvdata(dev);

	uio_unregister_device(info);
	pci_release_regions(dev);
	pci_disable_device(dev);
	pci_set_drvdata(dev, NULL);
	iounmap(info->mem[0].internal_addr);

	kfree (info);
}

static struct pci_device_id hilscher_pci_ids[] = {
	{
		.vendor =	PCI_VENDOR_ID_PLX,
		.device =	PCI_DEVICE_ID_PLX_9030,
		.subvendor =	PCI_SUBVENDOR_ID_PEP,
		.subdevice =	CIF_SUBDEVICE_PROFIBUS,
	},
	{
		.vendor =	PCI_VENDOR_ID_PLX,
		.device =	PCI_DEVICE_ID_PLX_9030,
		.subvendor =	PCI_SUBVENDOR_ID_PEP,
		.subdevice =	CIF_SUBDEVICE_DEVICENET,
	},
	{ 0, }
};

static struct pci_driver hilscher_pci_driver = {
	.name = "hilscher",
	.id_table = hilscher_pci_ids,
	.probe = hilscher_pci_probe,
	.remove = hilscher_pci_remove,
};

static int __init hilscher_init_module(void)
{
	return pci_register_driver(&hilscher_pci_driver);
}

static void __exit hilscher_exit_module(void)
{
	pci_unregister_driver(&hilscher_pci_driver);
}

module_init(hilscher_init_module);
module_exit(hilscher_exit_module);

MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");
Commit	Line	Data
bc4c4f45 HJK	1	/*
	2	* UIO Hilscher CIF card driver
	3	*
318af55d	4	* (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
bc4c4f45 HJK	5	* Original code (C) 2005 Benedikt Spranger <b.spranger@linutronix.de>
	6	*
	7	* Licensed under GPL version 2 only.
	8	*
	9	*/
	10
	11	#include <linux/device.h>
	12	#include <linux/module.h>
	13	#include <linux/pci.h>
5a0e3ad6	14	#include <linux/slab.h>
bc4c4f45 HJK	15	#include <linux/uio_driver.h>
	16
	17	#include <asm/io.h>
	18
bc4c4f45 HJK	19	#define PLX9030_INTCSR 0x4C
	20	#define INTSCR_INT1_ENABLE 0x01
	21	#define INTSCR_INT1_STATUS 0x04
	22	#define INT1_ENABLED_AND_ACTIVE (INTSCR_INT1_ENABLE \| INTSCR_INT1_STATUS)
	23
	24	#define PCI_SUBVENDOR_ID_PEP 0x1518
	25	#define CIF_SUBDEVICE_PROFIBUS 0x430
	26	#define CIF_SUBDEVICE_DEVICENET 0x432
	27
	28
	29	static irqreturn_t hilscher_handler(int irq, struct uio_info *dev_info)
	30	{
	31	void __iomem *plx_intscr = dev_info->mem[0].internal_addr
	32	+ PLX9030_INTCSR;
	33
	34	if ((ioread8(plx_intscr) & INT1_ENABLED_AND_ACTIVE)
	35	!= INT1_ENABLED_AND_ACTIVE)
	36	return IRQ_NONE;
	37
	38	/* Disable interrupt */
	39	iowrite8(ioread8(plx_intscr) & ~INTSCR_INT1_ENABLE, plx_intscr);
	40	return IRQ_HANDLED;
	41	}
	42
b17b75bb	43	static int hilscher_pci_probe(struct pci_dev *dev,
bc4c4f45 HJK	44	const struct pci_device_id *id)
	45	{
	46	struct uio_info *info;
	47
	48	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
	49	if (!info)
	50	return -ENOMEM;
	51
	52	if (pci_enable_device(dev))
	53	goto out_free;
	54
	55	if (pci_request_regions(dev, "hilscher"))
	56	goto out_disable;
	57
	58	info->mem[0].addr = pci_resource_start(dev, 0);
	59	if (!info->mem[0].addr)
	60	goto out_release;
7898aa5c	61	info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
bc4c4f45 HJK	62	if (!info->mem[0].internal_addr)
	63	goto out_release;
	64
	65	info->mem[0].size = pci_resource_len(dev, 0);
	66	info->mem[0].memtype = UIO_MEM_PHYS;
	67	info->mem[1].addr = pci_resource_start(dev, 2);
	68	info->mem[1].size = pci_resource_len(dev, 2);
	69	info->mem[1].memtype = UIO_MEM_PHYS;
	70	switch (id->subdevice) {
	71	case CIF_SUBDEVICE_PROFIBUS:
	72	info->name = "CIF_Profibus";
	73	break;
	74	case CIF_SUBDEVICE_DEVICENET:
	75	info->name = "CIF_Devicenet";
	76	break;
	77	default:
	78	info->name = "CIF_???";
	79	}
	80	info->version = "0.0.1";
	81	info->irq = dev->irq;
14ec5394	82	info->irq_flags = IRQF_SHARED;
bc4c4f45 HJK	83	info->handler = hilscher_handler;
	84
	85	if (uio_register_device(&dev->dev, info))
	86	goto out_unmap;
	87
	88	pci_set_drvdata(dev, info);
	89
	90	return 0;
	91	out_unmap:
	92	iounmap(info->mem[0].internal_addr);
	93	out_release:
	94	pci_release_regions(dev);
	95	out_disable:
	96	pci_disable_device(dev);
	97	out_free:
	98	kfree (info);
	99	return -ENODEV;
	100	}
	101
	102	static void hilscher_pci_remove(struct pci_dev *dev)
	103	{
	104	struct uio_info *info = pci_get_drvdata(dev);
	105
	106	uio_unregister_device(info);
	107	pci_release_regions(dev);
	108	pci_disable_device(dev);
	109	pci_set_drvdata(dev, NULL);
	110	iounmap(info->mem[0].internal_addr);
	111
	112	kfree (info);
	113	}
	114
d46f7438	115	static struct pci_device_id hilscher_pci_ids[] = {
bc4c4f45 HJK	116	{
	117	.vendor = PCI_VENDOR_ID_PLX,
	118	.device = PCI_DEVICE_ID_PLX_9030,
	119	.subvendor = PCI_SUBVENDOR_ID_PEP,
	120	.subdevice = CIF_SUBDEVICE_PROFIBUS,
	121	},
	122	{
	123	.vendor = PCI_VENDOR_ID_PLX,
	124	.device = PCI_DEVICE_ID_PLX_9030,
	125	.subvendor = PCI_SUBVENDOR_ID_PEP,
	126	.subdevice = CIF_SUBDEVICE_DEVICENET,
	127	},
	128	{ 0, }
	129	};
	130
	131	static struct pci_driver hilscher_pci_driver = {
	132	.name = "hilscher",
	133	.id_table = hilscher_pci_ids,
	134	.probe = hilscher_pci_probe,
	135	.remove = hilscher_pci_remove,
	136	};
	137
	138	static int __init hilscher_init_module(void)
	139	{
	140	return pci_register_driver(&hilscher_pci_driver);
	141	}
	142
	143	static void __exit hilscher_exit_module(void)
	144	{
	145	pci_unregister_driver(&hilscher_pci_driver);
	146	}
	147
	148	module_init(hilscher_init_module);
	149	module_exit(hilscher_exit_module);
	150
912335c4	151	MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
bc4c4f45 HJK	152	MODULE_LICENSE("GPL v2");
bc4c4f45 HJK	153	MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");