1/*
2 * UIO Hilscher CIF card driver
3 *
4 * (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
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>
14#include <linux/slab.h>
15#include <linux/uio_driver.h>
16
17#include <asm/io.h>
18
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
29static 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
43static int __devinit hilscher_pci_probe(struct pci_dev *dev,
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;
61	info->mem[0].internal_addr = pci_ioremap_bar(dev, 0);
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;
82	info->irq_flags = IRQF_SHARED;
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;
91out_unmap:
92	iounmap(info->mem[0].internal_addr);
93out_release:
94	pci_release_regions(dev);
95out_disable:
96	pci_disable_device(dev);
97out_free:
98	kfree (info);
99	return -ENODEV;
100}
101
102static 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
115static struct pci_device_id hilscher_pci_ids[] __devinitdata = {
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
131static 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
138static int __init hilscher_init_module(void)
139{
140	return pci_register_driver(&hilscher_pci_driver);
141}
142
143static void __exit hilscher_exit_module(void)
144{
145	pci_unregister_driver(&hilscher_pci_driver);
146}
147
148module_init(hilscher_init_module);
149module_exit(hilscher_exit_module);
150
151MODULE_DEVICE_TABLE(pci, hilscher_pci_ids);
152MODULE_LICENSE("GPL v2");
153MODULE_AUTHOR("Hans J. Koch, Benedikt Spranger");
154