1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | |
3 | /* |
4 | * pata-isapnp.c - ISA PnP PATA controller driver. |
5 | * Copyright 2005/2006 Red Hat Inc, all rights reserved. |
6 | * |
7 | * Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru> |
8 | */ |
9 | |
10 | #include <linux/kernel.h> |
11 | #include <linux/module.h> |
12 | #include <linux/isapnp.h> |
13 | #include <linux/init.h> |
14 | #include <linux/blkdev.h> |
15 | #include <linux/delay.h> |
16 | #include <scsi/scsi_host.h> |
17 | #include <linux/ata.h> |
18 | #include <linux/libata.h> |
19 | |
20 | #define DRV_NAME "pata_isapnp" |
21 | #define DRV_VERSION "0.2.5" |
22 | |
23 | static const struct scsi_host_template isapnp_sht = { |
24 | ATA_PIO_SHT(DRV_NAME), |
25 | }; |
26 | |
27 | static struct ata_port_operations isapnp_port_ops = { |
28 | .inherits = &ata_sff_port_ops, |
29 | .cable_detect = ata_cable_40wire, |
30 | }; |
31 | |
32 | static struct ata_port_operations isapnp_noalt_port_ops = { |
33 | .inherits = &ata_sff_port_ops, |
34 | .cable_detect = ata_cable_40wire, |
35 | /* No altstatus so we don't want to use the lost interrupt poll */ |
36 | .lost_interrupt = ATA_OP_NULL, |
37 | }; |
38 | |
39 | /** |
40 | * isapnp_init_one - attach an isapnp interface |
41 | * @idev: PnP device |
42 | * @dev_id: matching detect line |
43 | * |
44 | * Register an ISA bus IDE interface. Such interfaces are PIO 0 and |
45 | * non shared IRQ. |
46 | */ |
47 | |
48 | static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id) |
49 | { |
50 | struct ata_host *host; |
51 | struct ata_port *ap; |
52 | void __iomem *cmd_addr, *ctl_addr; |
53 | int irq = 0; |
54 | irq_handler_t handler = NULL; |
55 | |
56 | if (pnp_port_valid(dev: idev, bar: 0) == 0) |
57 | return -ENODEV; |
58 | |
59 | if (pnp_irq_valid(dev: idev, bar: 0)) { |
60 | irq = pnp_irq(dev: idev, bar: 0); |
61 | handler = ata_sff_interrupt; |
62 | } |
63 | |
64 | /* allocate host */ |
65 | host = ata_host_alloc(dev: &idev->dev, max_ports: 1); |
66 | if (!host) |
67 | return -ENOMEM; |
68 | |
69 | /* acquire resources and fill host */ |
70 | cmd_addr = devm_ioport_map(dev: &idev->dev, port: pnp_port_start(dev: idev, bar: 0), nr: 8); |
71 | if (!cmd_addr) |
72 | return -ENOMEM; |
73 | |
74 | ap = host->ports[0]; |
75 | |
76 | ap->ops = &isapnp_noalt_port_ops; |
77 | ap->pio_mask = ATA_PIO0; |
78 | ap->flags |= ATA_FLAG_SLAVE_POSS; |
79 | |
80 | ap->ioaddr.cmd_addr = cmd_addr; |
81 | |
82 | if (pnp_port_valid(dev: idev, bar: 1)) { |
83 | ctl_addr = devm_ioport_map(dev: &idev->dev, |
84 | port: pnp_port_start(dev: idev, bar: 1), nr: 1); |
85 | ap->ioaddr.altstatus_addr = ctl_addr; |
86 | ap->ioaddr.ctl_addr = ctl_addr; |
87 | ap->ops = &isapnp_port_ops; |
88 | } |
89 | |
90 | ata_sff_std_ports(ioaddr: &ap->ioaddr); |
91 | |
92 | ata_port_desc(ap, fmt: "cmd 0x%llx ctl 0x%llx" , |
93 | (unsigned long long)pnp_port_start(dev: idev, bar: 0), |
94 | (unsigned long long)pnp_port_start(dev: idev, bar: 1)); |
95 | |
96 | /* activate */ |
97 | return ata_host_activate(host, irq, irq_handler: handler, irq_flags: 0, |
98 | sht: &isapnp_sht); |
99 | } |
100 | |
101 | /** |
102 | * isapnp_remove_one - unplug an isapnp interface |
103 | * @idev: PnP device |
104 | * |
105 | * Remove a previously configured PnP ATA port. Called only on module |
106 | * unload events as the core does not currently deal with ISAPnP docking. |
107 | */ |
108 | |
109 | static void isapnp_remove_one(struct pnp_dev *idev) |
110 | { |
111 | struct device *dev = &idev->dev; |
112 | struct ata_host *host = dev_get_drvdata(dev); |
113 | |
114 | ata_host_detach(host); |
115 | } |
116 | |
117 | static struct pnp_device_id isapnp_devices[] = { |
118 | /* Generic ESDI/IDE/ATA compatible hard disk controller */ |
119 | {.id = "PNP0600" , .driver_data = 0}, |
120 | {.id = "" } |
121 | }; |
122 | |
123 | MODULE_DEVICE_TABLE(pnp, isapnp_devices); |
124 | |
125 | static struct pnp_driver isapnp_driver = { |
126 | .name = DRV_NAME, |
127 | .id_table = isapnp_devices, |
128 | .probe = isapnp_init_one, |
129 | .remove = isapnp_remove_one, |
130 | }; |
131 | |
132 | module_pnp_driver(isapnp_driver); |
133 | MODULE_AUTHOR("Alan Cox" ); |
134 | MODULE_DESCRIPTION("low-level driver for ISA PnP ATA" ); |
135 | MODULE_LICENSE("GPL" ); |
136 | MODULE_VERSION(DRV_VERSION); |
137 | |