pata_isapnp.c revision 68d1d07b510bb57a504588adc2bd2758adea0965 
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	.tf_load	= ata_tf_load,
28	.tf_read	= ata_tf_read,
29	.check_status 	= ata_check_status,
30	.exec_command	= ata_exec_command,
31	.dev_select 	= ata_std_dev_select,
32
33	.freeze		= ata_bmdma_freeze,
34	.thaw		= ata_bmdma_thaw,
35	.error_handler	= ata_bmdma_error_handler,
36	.post_internal_cmd = ata_bmdma_post_internal_cmd,
37	.cable_detect	= ata_cable_40wire,
38
39	.qc_prep 	= ata_qc_prep,
40	.qc_issue	= ata_qc_issue_prot,
41
42	.data_xfer	= ata_data_xfer,
43
44	.irq_clear	= ata_noop_irq_clear,
45	.irq_on		= ata_irq_on,
46
47	.port_start	= ata_sff_port_start,
48};
49
50/**
51 *	isapnp_init_one		-	attach an isapnp interface
52 *	@idev: PnP device
53 *	@dev_id: matching detect line
54 *
55 *	Register an ISA bus IDE interface. Such interfaces are PIO 0 and
56 *	non shared IRQ.
57 */
58
59static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
60{
61	struct ata_host *host;
62	struct ata_port *ap;
63	void __iomem *cmd_addr, *ctl_addr;
64	int irq = 0;
65	irq_handler_t handler = NULL;
66
67	if (pnp_port_valid(idev, 0) == 0)
68		return -ENODEV;
69
70	if (pnp_irq_valid(idev, 0)) {
71		irq = pnp_irq(idev, 0);
72		handler = ata_interrupt;
73	}
74
75	/* allocate host */
76	host = ata_host_alloc(&idev->dev, 1);
77	if (!host)
78		return -ENOMEM;
79
80	/* acquire resources and fill host */
81	cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
82	if (!cmd_addr)
83		return -ENOMEM;
84
85	ap = host->ports[0];
86
87	ap->ops = &isapnp_port_ops;
88	ap->pio_mask = 1;
89	ap->flags |= ATA_FLAG_SLAVE_POSS;
90
91	ap->ioaddr.cmd_addr = cmd_addr;
92
93	if (pnp_port_valid(idev, 1) == 0) {
94		ctl_addr = devm_ioport_map(&idev->dev,
95					   pnp_port_start(idev, 1), 1);
96		ap->ioaddr.altstatus_addr = ctl_addr;
97		ap->ioaddr.ctl_addr = ctl_addr;
98	}
99
100	ata_std_ports(&ap->ioaddr);
101
102	ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
103		      (unsigned long long)pnp_port_start(idev, 0),
104		      (unsigned long long)pnp_port_start(idev, 1));
105
106	/* activate */
107	return ata_host_activate(host, irq, handler, 0,
108				 &isapnp_sht);
109}
110
111/**
112 *	isapnp_remove_one	-	unplug an isapnp interface
113 *	@idev: PnP device
114 *
115 *	Remove a previously configured PnP ATA port. Called only on module
116 *	unload events as the core does not currently deal with ISAPnP docking.
117 */
118
119static void isapnp_remove_one(struct pnp_dev *idev)
120{
121	struct device *dev = &idev->dev;
122	struct ata_host *host = dev_get_drvdata(dev);
123
124	ata_host_detach(host);
125}
126
127static struct pnp_device_id isapnp_devices[] = {
128  	/* Generic ESDI/IDE/ATA compatible hard disk controller */
129	{.id = "PNP0600", .driver_data = 0},
130	{.id = ""}
131};
132
133MODULE_DEVICE_TABLE(pnp, isapnp_devices);
134
135static struct pnp_driver isapnp_driver = {
136	.name		= DRV_NAME,
137	.id_table	= isapnp_devices,
138	.probe		= isapnp_init_one,
139	.remove		= isapnp_remove_one,
140};
141
142static int __init isapnp_init(void)
143{
144	return pnp_register_driver(&isapnp_driver);
145}
146
147static void __exit isapnp_exit(void)
148{
149	pnp_unregister_driver(&isapnp_driver);
150}
151
152MODULE_AUTHOR("Alan Cox");
153MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
154MODULE_LICENSE("GPL");
155MODULE_VERSION(DRV_VERSION);
156
157module_init(isapnp_init);
158module_exit(isapnp_exit);
159