pata_isapnp.c revision 6d32d30f55020d766388df7515f771f68c973033 
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	.module			= THIS_MODULE,
24	.name			= DRV_NAME,
25	.ioctl			= ata_scsi_ioctl,
26	.queuecommand		= ata_scsi_queuecmd,
27	.can_queue		= ATA_DEF_QUEUE,
28	.this_id		= ATA_SHT_THIS_ID,
29	.sg_tablesize		= LIBATA_MAX_PRD,
30	.cmd_per_lun		= ATA_SHT_CMD_PER_LUN,
31	.emulated		= ATA_SHT_EMULATED,
32	.use_clustering		= ATA_SHT_USE_CLUSTERING,
33	.proc_name		= DRV_NAME,
34	.dma_boundary		= ATA_DMA_BOUNDARY,
35	.slave_configure	= ata_scsi_slave_config,
36	.slave_destroy		= ata_scsi_slave_destroy,
37	.bios_param		= ata_std_bios_param,
38};
39
40static struct ata_port_operations isapnp_port_ops = {
41	.port_disable	= ata_port_disable,
42	.tf_load	= ata_tf_load,
43	.tf_read	= ata_tf_read,
44	.check_status 	= ata_check_status,
45	.exec_command	= ata_exec_command,
46	.dev_select 	= ata_std_dev_select,
47
48	.freeze		= ata_bmdma_freeze,
49	.thaw		= ata_bmdma_thaw,
50	.error_handler	= ata_bmdma_error_handler,
51	.post_internal_cmd = ata_bmdma_post_internal_cmd,
52	.cable_detect	= ata_cable_40wire,
53
54	.qc_prep 	= ata_qc_prep,
55	.qc_issue	= ata_qc_issue_prot,
56
57	.data_xfer	= ata_data_xfer,
58
59	.irq_clear	= ata_bmdma_irq_clear,
60	.irq_on		= ata_irq_on,
61
62	.port_start	= ata_port_start,
63};
64
65/**
66 *	isapnp_init_one		-	attach an isapnp interface
67 *	@idev: PnP device
68 *	@dev_id: matching detect line
69 *
70 *	Register an ISA bus IDE interface. Such interfaces are PIO 0 and
71 *	non shared IRQ.
72 */
73
74static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
75{
76	struct ata_host *host;
77	struct ata_port *ap;
78	void __iomem *cmd_addr, *ctl_addr;
79
80	if (pnp_port_valid(idev, 0) == 0)
81		return -ENODEV;
82
83	/* FIXME: Should selected polled PIO here not fail */
84	if (pnp_irq_valid(idev, 0) == 0)
85		return -ENODEV;
86
87	/* allocate host */
88	host = ata_host_alloc(&idev->dev, 1);
89	if (!host)
90		return -ENOMEM;
91
92	/* acquire resources and fill host */
93	cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
94	if (!cmd_addr)
95		return -ENOMEM;
96
97	ap = host->ports[0];
98
99	ap->ops = &isapnp_port_ops;
100	ap->pio_mask = 1;
101	ap->flags |= ATA_FLAG_SLAVE_POSS;
102
103	ap->ioaddr.cmd_addr = cmd_addr;
104
105	if (pnp_port_valid(idev, 1) == 0) {
106		ctl_addr = devm_ioport_map(&idev->dev,
107					   pnp_port_start(idev, 1), 1);
108		ap->ioaddr.altstatus_addr = ctl_addr;
109		ap->ioaddr.ctl_addr = ctl_addr;
110	}
111
112	ata_std_ports(&ap->ioaddr);
113
114	/* activate */
115	return ata_host_activate(host, pnp_irq(idev, 0), ata_interrupt, 0,
116				 &isapnp_sht);
117}
118
119/**
120 *	isapnp_remove_one	-	unplug an isapnp interface
121 *	@idev: PnP device
122 *
123 *	Remove a previously configured PnP ATA port. Called only on module
124 *	unload events as the core does not currently deal with ISAPnP docking.
125 */
126
127static void isapnp_remove_one(struct pnp_dev *idev)
128{
129	struct device *dev = &idev->dev;
130	struct ata_host *host = dev_get_drvdata(dev);
131
132	ata_host_detach(host);
133}
134
135static struct pnp_device_id isapnp_devices[] = {
136  	/* Generic ESDI/IDE/ATA compatible hard disk controller */
137	{.id = "PNP0600", .driver_data = 0},
138	{.id = ""}
139};
140
141MODULE_DEVICE_TABLE(pnp, isapnp_devices);
142
143static struct pnp_driver isapnp_driver = {
144	.name		= DRV_NAME,
145	.id_table	= isapnp_devices,
146	.probe		= isapnp_init_one,
147	.remove		= isapnp_remove_one,
148};
149
150static int __init isapnp_init(void)
151{
152	return pnp_register_driver(&isapnp_driver);
153}
154
155static void __exit isapnp_exit(void)
156{
157	pnp_unregister_driver(&isapnp_driver);
158}
159
160MODULE_AUTHOR("Alan Cox");
161MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
162MODULE_LICENSE("GPL");
163MODULE_VERSION(DRV_VERSION);
164
165module_init(isapnp_init);
166module_exit(isapnp_exit);
167