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