[net-next-2.6.git] / drivers / uio / uio_netx.c

/*
 * UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
 * See http://www.hilscher.com for details.
 *
 * (C) 2007 Hans J. Koch <hjk@linutronix.de>
 * (C) 2008 Manuel Traut <manut@linutronix.de>
 *
 * Licensed under GPL version 2 only.
 *
 */

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

#define PCI_VENDOR_ID_HILSCHER		0x15CF
#define PCI_DEVICE_ID_HILSCHER_NETX	0x0000
#define PCI_SUBDEVICE_ID_NXSB_PCA	0x3235
#define PCI_SUBDEVICE_ID_NXPCA		0x3335

#define DPM_HOST_INT_EN0	0xfff0
#define DPM_HOST_INT_STAT0	0xffe0

#define DPM_HOST_INT_MASK	0xe600ffff
#define DPM_HOST_INT_GLOBAL_EN	0x80000000

static irqreturn_t netx_handler(int irq, struct uio_info *dev_info)
{
	void __iomem *int_enable_reg = dev_info->mem[0].internal_addr
					+ DPM_HOST_INT_EN0;
	void __iomem *int_status_reg = dev_info->mem[0].internal_addr
					+ DPM_HOST_INT_STAT0;

	/* Is one of our interrupts enabled and active ? */
	if (!(ioread32(int_enable_reg) & ioread32(int_status_reg)
		& DPM_HOST_INT_MASK))
		return IRQ_NONE;

	/* Disable interrupt */
	iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN,
		int_enable_reg);
	return IRQ_HANDLED;
}

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

	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, "netx"))
		goto out_disable;

	switch (id->device) {
	case PCI_DEVICE_ID_HILSCHER_NETX:
		bar = 0;
		info->name = "netx";
		break;
	default:
		bar = 2;
		info->name = "netx_plx";
	}

	/* BAR0 or 2 points to the card's dual port memory */
	info->mem[0].addr = pci_resource_start(dev, bar);
	if (!info->mem[0].addr)
		goto out_release;
	info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
						pci_resource_len(dev, bar));

	if (!info->mem[0].internal_addr)
			goto out_release;

	info->mem[0].size = pci_resource_len(dev, bar);
	info->mem[0].memtype = UIO_MEM_PHYS;
	info->irq = dev->irq;
	info->irq_flags = IRQF_SHARED;
	info->handler = netx_handler;
	info->version = "0.0.1";

	/* Make sure all interrupts are disabled */
	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);

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

	pci_set_drvdata(dev, info);
	dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
				info->name);

	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 netx_pci_remove(struct pci_dev *dev)
{
	struct uio_info *info = pci_get_drvdata(dev);

	/* Disable all interrupts */
	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
	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 netx_pci_ids[] = {
	{
		.vendor =	PCI_VENDOR_ID_HILSCHER,
		.device =	PCI_DEVICE_ID_HILSCHER_NETX,
		.subvendor =	0,
		.subdevice =	0,
	},
	{
		.vendor =	PCI_VENDOR_ID_PLX,
		.device =	PCI_DEVICE_ID_PLX_9030,
		.subvendor =	PCI_VENDOR_ID_PLX,
		.subdevice =	PCI_SUBDEVICE_ID_NXSB_PCA,
	},
	{
		.vendor =	PCI_VENDOR_ID_PLX,
		.device =	PCI_DEVICE_ID_PLX_9030,
		.subvendor =	PCI_VENDOR_ID_PLX,
		.subdevice =	PCI_SUBDEVICE_ID_NXPCA,
	},
	{ 0, }
};

static struct pci_driver netx_pci_driver = {
	.name = "netx",
	.id_table = netx_pci_ids,
	.probe = netx_pci_probe,
	.remove = netx_pci_remove,
};

static int __init netx_init_module(void)
{
	return pci_register_driver(&netx_pci_driver);
}

static void __exit netx_exit_module(void)
{
	pci_unregister_driver(&netx_pci_driver);
}

module_init(netx_init_module);
module_exit(netx_exit_module);

MODULE_DEVICE_TABLE(pci, netx_pci_ids);
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Hans J. Koch, Manuel Traut");
Commit	Line	Data
8f314cfc HK	1	/*
	2	* UIO driver for Hilscher NetX based fieldbus cards (cifX, comX).
	3	* See http://www.hilscher.com for details.
	4	*
	5	* (C) 2007 Hans J. Koch <hjk@linutronix.de>
	6	* (C) 2008 Manuel Traut <manut@linutronix.de>
	7	*
	8	* Licensed under GPL version 2 only.
	9	*
	10	*/
	11
	12	#include <linux/device.h>
	13	#include <linux/io.h>
	14	#include <linux/module.h>
	15	#include <linux/pci.h>
5a0e3ad6	16	#include <linux/slab.h>
8f314cfc HK	17	#include <linux/uio_driver.h>
	18
	19	#define PCI_VENDOR_ID_HILSCHER 0x15CF
	20	#define PCI_DEVICE_ID_HILSCHER_NETX 0x0000
	21	#define PCI_SUBDEVICE_ID_NXSB_PCA 0x3235
	22	#define PCI_SUBDEVICE_ID_NXPCA 0x3335
	23
	24	#define DPM_HOST_INT_EN0 0xfff0
	25	#define DPM_HOST_INT_STAT0 0xffe0
	26
	27	#define DPM_HOST_INT_MASK 0xe600ffff
	28	#define DPM_HOST_INT_GLOBAL_EN 0x80000000
	29
	30	static irqreturn_t netx_handler(int irq, struct uio_info *dev_info)
	31	{
	32	void __iomem *int_enable_reg = dev_info->mem[0].internal_addr
	33	+ DPM_HOST_INT_EN0;
	34	void __iomem *int_status_reg = dev_info->mem[0].internal_addr
	35	+ DPM_HOST_INT_STAT0;
	36
	37	/* Is one of our interrupts enabled and active ? */
	38	if (!(ioread32(int_enable_reg) & ioread32(int_status_reg)
	39	& DPM_HOST_INT_MASK))
	40	return IRQ_NONE;
	41
	42	/* Disable interrupt */
	43	iowrite32(ioread32(int_enable_reg) & ~DPM_HOST_INT_GLOBAL_EN,
	44	int_enable_reg);
	45	return IRQ_HANDLED;
	46	}
	47
	48	static int __devinit netx_pci_probe(struct pci_dev *dev,
	49	const struct pci_device_id *id)
	50	{
	51	struct uio_info *info;
	52	int bar;
	53
	54	info = kzalloc(sizeof(struct uio_info), GFP_KERNEL);
	55	if (!info)
	56	return -ENOMEM;
	57
	58	if (pci_enable_device(dev))
	59	goto out_free;
	60
	61	if (pci_request_regions(dev, "netx"))
	62	goto out_disable;
	63
	64	switch (id->device) {
	65	case PCI_DEVICE_ID_HILSCHER_NETX:
	66	bar = 0;
	67	info->name = "netx";
	68	break;
	69	default:
	70	bar = 2;
	71	info->name = "netx_plx";
	72	}
	73
	74	/* BAR0 or 2 points to the card's dual port memory */
	75	info->mem[0].addr = pci_resource_start(dev, bar);
	76	if (!info->mem[0].addr)
	77	goto out_release;
	78	info->mem[0].internal_addr = ioremap(pci_resource_start(dev, bar),
	79	pci_resource_len(dev, bar));
	80
81	if (!info->mem[0].internal_addr)
82	goto out_release;
83
84	info->mem[0].size = pci_resource_len(dev, bar);
85	info->mem[0].memtype = UIO_MEM_PHYS;
86	info->irq = dev->irq;
87	info->irq_flags = IRQF_SHARED;
88	info->handler = netx_handler;
89	info->version = "0.0.1";
90
91	/* Make sure all interrupts are disabled */
92	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
93
94	if (uio_register_device(&dev->dev, info))
95	goto out_unmap;
96
97	pci_set_drvdata(dev, info);
98	dev_info(&dev->dev, "Found %s card, registered UIO device.\n",
99	info->name);
100
101	return 0;
102
103	out_unmap:
104	iounmap(info->mem[0].internal_addr);
105	out_release:
106	pci_release_regions(dev);
107	out_disable:
108	pci_disable_device(dev);
109	out_free:
110	kfree(info);
111	return -ENODEV;
112	}
113
114	static void netx_pci_remove(struct pci_dev *dev)
115	{
116	struct uio_info *info = pci_get_drvdata(dev);
117
118	/* Disable all interrupts */
119	iowrite32(0, info->mem[0].internal_addr + DPM_HOST_INT_EN0);
120	uio_unregister_device(info);
121	pci_release_regions(dev);
122	pci_disable_device(dev);
123	pci_set_drvdata(dev, NULL);
124	iounmap(info->mem[0].internal_addr);
125
126	kfree(info);
127	}
128
129	static struct pci_device_id netx_pci_ids[] = {
130	{
131	.vendor = PCI_VENDOR_ID_HILSCHER,
132	.device = PCI_DEVICE_ID_HILSCHER_NETX,
133	.subvendor = 0,
134	.subdevice = 0,
135	},
136	{
137	.vendor = PCI_VENDOR_ID_PLX,
138	.device = PCI_DEVICE_ID_PLX_9030,
139	.subvendor = PCI_VENDOR_ID_PLX,
140	.subdevice = PCI_SUBDEVICE_ID_NXSB_PCA,
141	},
142	{
143	.vendor = PCI_VENDOR_ID_PLX,
144	.device = PCI_DEVICE_ID_PLX_9030,
145	.subvendor = PCI_VENDOR_ID_PLX,
146	.subdevice = PCI_SUBDEVICE_ID_NXPCA,
147	},
148	{ 0, }
149	};
150
151	static struct pci_driver netx_pci_driver = {
152	.name = "netx",
153	.id_table = netx_pci_ids,
154	.probe = netx_pci_probe,
155	.remove = netx_pci_remove,
156	};
157
158	static int __init netx_init_module(void)
159	{
160	return pci_register_driver(&netx_pci_driver);
161	}
162
163	static void __exit netx_exit_module(void)
164	{
165	pci_unregister_driver(&netx_pci_driver);
166	}
167
168	module_init(netx_init_module);
169	module_exit(netx_exit_module);
170
171	MODULE_DEVICE_TABLE(pci, netx_pci_ids);
172	MODULE_LICENSE("GPL v2");
173	MODULE_AUTHOR("Hans J. Koch, Manuel Traut");