pata_isapnp.c revision a73984a0d5664fa1bfdd9f0a475b8d74af7f44a6 
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 "0.2.0"
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_handler	= ata_interrupt,
60	.irq_clear	= ata_bmdma_irq_clear,
61	.irq_on		= ata_irq_on,
62	.irq_ack	= ata_irq_ack,
63
64	.port_start	= ata_port_start,
65};
66
67/**
68 *	isapnp_init_one		-	attach an isapnp interface
69 *	@idev: PnP device
70 *	@dev_id: matching detect line
71 *
72 *	Register an ISA bus IDE interface. Such interfaces are PIO 0 and
73 *	non shared IRQ.
74 */
75
76static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
77{
78	struct ata_probe_ent ae;
79	void __iomem *cmd_addr, *ctl_addr;
80
81	if (pnp_port_valid(idev, 0) == 0)
82		return -ENODEV;
83
84	/* FIXME: Should selected polled PIO here not fail */
85	if (pnp_irq_valid(idev, 0) == 0)
86		return -ENODEV;
87
88	cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
89	if (!cmd_addr)
90		return -ENOMEM;
91
92	memset(&ae, 0, sizeof(struct ata_probe_ent));
93	INIT_LIST_HEAD(&ae.node);
94	ae.dev = &idev->dev;
95	ae.port_ops = &isapnp_port_ops;
96	ae.sht = &isapnp_sht;
97	ae.n_ports = 1;
98	ae.pio_mask = 1;		/* ISA so PIO 0 cycles */
99	ae.irq = pnp_irq(idev, 0);
100	ae.irq_flags = 0;
101	ae.port_flags = ATA_FLAG_SLAVE_POSS;
102	ae.port[0].cmd_addr = cmd_addr;
103
104	if (pnp_port_valid(idev, 1) == 0) {
105		ctl_addr = devm_ioport_map(&idev->dev,
106					   pnp_port_start(idev, 1), 1);
107		ae.port[0].altstatus_addr = ctl_addr;
108		ae.port[0].ctl_addr = ctl_addr;
109		ae.port_flags |= ATA_FLAG_SRST;
110	}
111	ata_std_ports(&ae.port[0]);
112
113	if (ata_device_add(&ae) == 0)
114		return -ENODEV;
115	return 0;
116}
117
118/**
119 *	isapnp_remove_one	-	unplug an isapnp interface
120 *	@idev: PnP device
121 *
122 *	Remove a previously configured PnP ATA port. Called only on module
123 *	unload events as the core does not currently deal with ISAPnP docking.
124 */
125
126static void isapnp_remove_one(struct pnp_dev *idev)
127{
128	struct device *dev = &idev->dev;
129	struct ata_host *host = dev_get_drvdata(dev);
130
131	ata_host_detach(host);
132}
133
134static struct pnp_device_id isapnp_devices[] = {
135  	/* Generic ESDI/IDE/ATA compatible hard disk controller */
136	{.id = "PNP0600", .driver_data = 0},
137	{.id = ""}
138};
139
140static struct pnp_driver isapnp_driver = {
141	.name		= DRV_NAME,
142	.id_table	= isapnp_devices,
143	.probe		= isapnp_init_one,
144	.remove		= isapnp_remove_one,
145};
146
147static int __init isapnp_init(void)
148{
149	return pnp_register_driver(&isapnp_driver);
150}
151
152static void __exit isapnp_exit(void)
153{
154	pnp_unregister_driver(&isapnp_driver);
155}
156
157MODULE_AUTHOR("Alan Cox");
158MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
159MODULE_LICENSE("GPL");
160MODULE_VERSION(DRV_VERSION);
161
162module_init(isapnp_init);
163module_exit(isapnp_exit);
164