pata_isapnp.c revision 9363c3825ea9ad76561eb48a395349dd29211ed6 
1
2/*
3 *   pata-isapnp.c - ISA PnP PATA controller driver.
4 *   Copyright 2005/2006 Red Hat Inc <alan@redhat.com>, all rights reserved.
5 *
6 *   Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
7 */
8
9#include <linux/kernel.h>
10#include <linux/module.h>
11#include <linux/isapnp.h>
12#include <linux/init.h>
13#include <linux/blkdev.h>
14#include <linux/delay.h>
15#include <scsi/scsi_host.h>
16#include <linux/ata.h>
17#include <linux/libata.h>
18
19#define DRV_NAME "pata_isapnp"
20#define DRV_VERSION "0.2.2"
21
22static struct scsi_host_template isapnp_sht = {
23	ATA_PIO_SHT(DRV_NAME),
24};
25
26static struct ata_port_operations isapnp_port_ops = {
27	.inherits	= &ata_sff_port_ops,
28	.cable_detect	= ata_cable_40wire,
29};
30
31/**
32 *	isapnp_init_one		-	attach an isapnp interface
33 *	@idev: PnP device
34 *	@dev_id: matching detect line
35 *
36 *	Register an ISA bus IDE interface. Such interfaces are PIO 0 and
37 *	non shared IRQ.
38 */
39
40static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
41{
42	struct ata_host *host;
43	struct ata_port *ap;
44	void __iomem *cmd_addr, *ctl_addr;
45	int irq = 0;
46	irq_handler_t handler = NULL;
47
48	if (pnp_port_valid(idev, 0) == 0)
49		return -ENODEV;
50
51	if (pnp_irq_valid(idev, 0)) {
52		irq = pnp_irq(idev, 0);
53		handler = ata_sff_interrupt;
54	}
55
56	/* allocate host */
57	host = ata_host_alloc(&idev->dev, 1);
58	if (!host)
59		return -ENOMEM;
60
61	/* acquire resources and fill host */
62	cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
63	if (!cmd_addr)
64		return -ENOMEM;
65
66	ap = host->ports[0];
67
68	ap->ops = &isapnp_port_ops;
69	ap->pio_mask = 1;
70	ap->flags |= ATA_FLAG_SLAVE_POSS;
71
72	ap->ioaddr.cmd_addr = cmd_addr;
73
74	if (pnp_port_valid(idev, 1) == 0) {
75		ctl_addr = devm_ioport_map(&idev->dev,
76					   pnp_port_start(idev, 1), 1);
77		ap->ioaddr.altstatus_addr = ctl_addr;
78		ap->ioaddr.ctl_addr = ctl_addr;
79	}
80
81	ata_sff_std_ports(&ap->ioaddr);
82
83	ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
84		      (unsigned long long)pnp_port_start(idev, 0),
85		      (unsigned long long)pnp_port_start(idev, 1));
86
87	/* activate */
88	return ata_host_activate(host, irq, handler, 0,
89				 &isapnp_sht);
90}
91
92/**
93 *	isapnp_remove_one	-	unplug an isapnp interface
94 *	@idev: PnP device
95 *
96 *	Remove a previously configured PnP ATA port. Called only on module
97 *	unload events as the core does not currently deal with ISAPnP docking.
98 */
99
100static void isapnp_remove_one(struct pnp_dev *idev)
101{
102	struct device *dev = &idev->dev;
103	struct ata_host *host = dev_get_drvdata(dev);
104
105	ata_host_detach(host);
106}
107
108static struct pnp_device_id isapnp_devices[] = {
109  	/* Generic ESDI/IDE/ATA compatible hard disk controller */
110	{.id = "PNP0600", .driver_data = 0},
111	{.id = ""}
112};
113
114MODULE_DEVICE_TABLE(pnp, isapnp_devices);
115
116static struct pnp_driver isapnp_driver = {
117	.name		= DRV_NAME,
118	.id_table	= isapnp_devices,
119	.probe		= isapnp_init_one,
120	.remove		= isapnp_remove_one,
121};
122
123static int __init isapnp_init(void)
124{
125	return pnp_register_driver(&isapnp_driver);
126}
127
128static void __exit isapnp_exit(void)
129{
130	pnp_unregister_driver(&isapnp_driver);
131}
132
133MODULE_AUTHOR("Alan Cox");
134MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
135MODULE_LICENSE("GPL");
136MODULE_VERSION(DRV_VERSION);
137
138module_init(isapnp_init);
139module_exit(isapnp_exit);
140