Root/drivers/ata/pata_isapnp.c

1
2/*
3 * pata-isapnp.c - ISA PnP PATA controller driver.
4 * Copyright 2005/2006 Red Hat Inc, 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 "0.2.5"
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
31static struct ata_port_operations isapnp_noalt_port_ops = {
32    .inherits = &ata_sff_port_ops,
33    .cable_detect = ata_cable_40wire,
34    /* No altstatus so we don't want to use the lost interrupt poll */
35    .lost_interrupt = ATA_OP_NULL,
36};
37
38/**
39 * isapnp_init_one - attach an isapnp interface
40 * @idev: PnP device
41 * @dev_id: matching detect line
42 *
43 * Register an ISA bus IDE interface. Such interfaces are PIO 0 and
44 * non shared IRQ.
45 */
46
47static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
48{
49    struct ata_host *host;
50    struct ata_port *ap;
51    void __iomem *cmd_addr, *ctl_addr;
52    int irq = 0;
53    irq_handler_t handler = NULL;
54
55    if (pnp_port_valid(idev, 0) == 0)
56        return -ENODEV;
57
58    if (pnp_irq_valid(idev, 0)) {
59        irq = pnp_irq(idev, 0);
60        handler = ata_sff_interrupt;
61    }
62
63    /* allocate host */
64    host = ata_host_alloc(&idev->dev, 1);
65    if (!host)
66        return -ENOMEM;
67
68    /* acquire resources and fill host */
69    cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
70    if (!cmd_addr)
71        return -ENOMEM;
72
73    ap = host->ports[0];
74
75    ap->ops = &isapnp_noalt_port_ops;
76    ap->pio_mask = ATA_PIO0;
77    ap->flags |= ATA_FLAG_SLAVE_POSS;
78
79    ap->ioaddr.cmd_addr = cmd_addr;
80
81    if (pnp_port_valid(idev, 1) == 0) {
82        ctl_addr = devm_ioport_map(&idev->dev,
83                       pnp_port_start(idev, 1), 1);
84        ap->ioaddr.altstatus_addr = ctl_addr;
85        ap->ioaddr.ctl_addr = ctl_addr;
86        ap->ops = &isapnp_port_ops;
87    }
88
89    ata_sff_std_ports(&ap->ioaddr);
90
91    ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
92              (unsigned long long)pnp_port_start(idev, 0),
93              (unsigned long long)pnp_port_start(idev, 1));
94
95    /* activate */
96    return ata_host_activate(host, irq, handler, 0,
97                 &isapnp_sht);
98}
99
100/**
101 * isapnp_remove_one - unplug an isapnp interface
102 * @idev: PnP device
103 *
104 * Remove a previously configured PnP ATA port. Called only on module
105 * unload events as the core does not currently deal with ISAPnP docking.
106 */
107
108static void isapnp_remove_one(struct pnp_dev *idev)
109{
110    struct device *dev = &idev->dev;
111    struct ata_host *host = dev_get_drvdata(dev);
112
113    ata_host_detach(host);
114}
115
116static struct pnp_device_id isapnp_devices[] = {
117      /* Generic ESDI/IDE/ATA compatible hard disk controller */
118    {.id = "PNP0600", .driver_data = 0},
119    {.id = ""}
120};
121
122MODULE_DEVICE_TABLE(pnp, isapnp_devices);
123
124static struct pnp_driver isapnp_driver = {
125    .name = DRV_NAME,
126    .id_table = isapnp_devices,
127    .probe = isapnp_init_one,
128    .remove = isapnp_remove_one,
129};
130
131static int __init isapnp_init(void)
132{
133    return pnp_register_driver(&isapnp_driver);
134}
135
136static void __exit isapnp_exit(void)
137{
138    pnp_unregister_driver(&isapnp_driver);
139}
140
141MODULE_AUTHOR("Alan Cox");
142MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
143MODULE_LICENSE("GPL");
144MODULE_VERSION(DRV_VERSION);
145
146module_init(isapnp_init);
147module_exit(isapnp_exit);
148

Archive Download this file



interactive