| 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); |