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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 | |
22 | static struct scsi_host_template isapnp_sht = { |
23 | ATA_PIO_SHT(DRV_NAME), |
24 | }; |
25 | |
26 | static struct ata_port_operations isapnp_port_ops = { |
27 | .inherits = &ata_sff_port_ops, |
28 | .cable_detect = ata_cable_40wire, |
29 | }; |
30 | |
31 | static 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 | |
47 | static 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 | |
108 | static 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 | |
116 | static 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 | |
122 | MODULE_DEVICE_TABLE(pnp, isapnp_devices); |
123 | |
124 | static 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 | |
131 | static int __init isapnp_init(void) |
132 | { |
133 | return pnp_register_driver(&isapnp_driver); |
134 | } |
135 | |
136 | static void __exit isapnp_exit(void) |
137 | { |
138 | pnp_unregister_driver(&isapnp_driver); |
139 | } |
140 | |
141 | MODULE_AUTHOR("Alan Cox"); |
142 | MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); |
143 | MODULE_LICENSE("GPL"); |
144 | MODULE_VERSION(DRV_VERSION); |
145 | |
146 | module_init(isapnp_init); |
147 | module_exit(isapnp_exit); |
148 |
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