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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)) { | |
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 | module_pnp_driver(isapnp_driver); | |
132 | MODULE_AUTHOR("Alan Cox"); | |
133 | MODULE_DESCRIPTION("low-level driver for ISA PnP ATA"); | |
134 | MODULE_LICENSE("GPL"); | |
135 | MODULE_VERSION(DRV_VERSION); |