LXR linux/drivers/ata/pata

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