pata_isapnp.c revision 358f9a77a668660729e705fde9c3cf69f013aa98 
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	.tf_load	= ata_tf_load,
42	.tf_read	= ata_tf_read,
43	.check_status 	= ata_check_status,
44	.exec_command	= ata_exec_command,
45	.dev_select 	= ata_std_dev_select,
46
47	.freeze		= ata_bmdma_freeze,
48	.thaw		= ata_bmdma_thaw,
49	.error_handler	= ata_bmdma_error_handler,
50	.post_internal_cmd = ata_bmdma_post_internal_cmd,
51	.cable_detect	= ata_cable_40wire,
52
53	.qc_prep 	= ata_qc_prep,
54	.qc_issue	= ata_qc_issue_prot,
55
56	.data_xfer	= ata_data_xfer,
57
58	.irq_clear	= ata_noop_irq_clear,
59	.irq_on		= ata_irq_on,
60
61	.port_start	= ata_sff_port_start,
62};
63
64/**
65 *	isapnp_init_one		-	attach an isapnp interface
66 *	@idev: PnP device
67 *	@dev_id: matching detect line
68 *
69 *	Register an ISA bus IDE interface. Such interfaces are PIO 0 and
70 *	non shared IRQ.
71 */
72
73static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
74{
75	struct ata_host *host;
76	struct ata_port *ap;
77	void __iomem *cmd_addr, *ctl_addr;
78	int irq = 0;
79	irq_handler_t handler = NULL;
80
81	if (pnp_port_valid(idev, 0) == 0)
82		return -ENODEV;
83
84	if (pnp_irq_valid(idev, 0)) {
85		irq = pnp_irq(idev, 0);
86		handler = ata_interrupt;
87	}
88
89	/* allocate host */
90	host = ata_host_alloc(&idev->dev, 1);
91	if (!host)
92		return -ENOMEM;
93
94	/* acquire resources and fill host */
95	cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
96	if (!cmd_addr)
97		return -ENOMEM;
98
99	ap = host->ports[0];
100
101	ap->ops = &isapnp_port_ops;
102	ap->pio_mask = 1;
103	ap->flags |= ATA_FLAG_SLAVE_POSS;
104
105	ap->ioaddr.cmd_addr = cmd_addr;
106
107	if (pnp_port_valid(idev, 1) == 0) {
108		ctl_addr = devm_ioport_map(&idev->dev,
109					   pnp_port_start(idev, 1), 1);
110		ap->ioaddr.altstatus_addr = ctl_addr;
111		ap->ioaddr.ctl_addr = ctl_addr;
112	}
113
114	ata_std_ports(&ap->ioaddr);
115
116	ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
117		      (unsigned long long)pnp_port_start(idev, 0),
118		      (unsigned long long)pnp_port_start(idev, 1));
119
120	/* activate */
121	return ata_host_activate(host, irq, handler, 0,
122				 &isapnp_sht);
123}
124
125/**
126 *	isapnp_remove_one	-	unplug an isapnp interface
127 *	@idev: PnP device
128 *
129 *	Remove a previously configured PnP ATA port. Called only on module
130 *	unload events as the core does not currently deal with ISAPnP docking.
131 */
132
133static void isapnp_remove_one(struct pnp_dev *idev)
134{
135	struct device *dev = &idev->dev;
136	struct ata_host *host = dev_get_drvdata(dev);
137
138	ata_host_detach(host);
139}
140
141static struct pnp_device_id isapnp_devices[] = {
142  	/* Generic ESDI/IDE/ATA compatible hard disk controller */
143	{.id = "PNP0600", .driver_data = 0},
144	{.id = ""}
145};
146
147MODULE_DEVICE_TABLE(pnp, isapnp_devices);
148
149static struct pnp_driver isapnp_driver = {
150	.name		= DRV_NAME,
151	.id_table	= isapnp_devices,
152	.probe		= isapnp_init_one,
153	.remove		= isapnp_remove_one,
154};
155
156static int __init isapnp_init(void)
157{
158	return pnp_register_driver(&isapnp_driver);
159}
160
161static void __exit isapnp_exit(void)
162{
163	pnp_unregister_driver(&isapnp_driver);
164}
165
166MODULE_AUTHOR("Alan Cox");
167MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
168MODULE_LICENSE("GPL");
169MODULE_VERSION(DRV_VERSION);
170
171module_init(isapnp_init);
172module_exit(isapnp_exit);
173