drivers/ata/pata_isapnp.c

   1
   2 /*
   3  *   pata-isapnp.c - ISA PnP PATA controller driver.
   4  *   Copyright 2005/2006 Red Hat Inc <alan@redhat.com>, 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 "0.2.2"
  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 /**
  32  *      isapnp_init_one         -       attach an isapnp interface
  33  *      @idev: PnP device
  34  *      @dev_id: matching detect line
  35  *
  36  *      Register an ISA bus IDE interface. Such interfaces are PIO 0 and
  37  *      non shared IRQ.
  38  */
  39
  40 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
  41 {
  42         struct ata_host *host;
  43         struct ata_port *ap;
  44         void __iomem *cmd_addr, *ctl_addr;
  45         int irq = 0;
  46         irq_handler_t handler = NULL;
  47
  48         if (pnp_port_valid(idev, 0) == 0)
  49                 return -ENODEV;
  50
  51         if (pnp_irq_valid(idev, 0)) {
  52                 irq = pnp_irq(idev, 0);
  53                 handler = ata_sff_interrupt;
  54         }
  55
  56         /* allocate host */
  57         host = ata_host_alloc(&idev->dev, 1);
  58         if (!host)
  59                 return -ENOMEM;
  60
  61         /* acquire resources and fill host */
  62         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
  63         if (!cmd_addr)
  64                 return -ENOMEM;
  65
  66         ap = host->ports[0];
  67
  68         ap->ops = &isapnp_port_ops;
  69         ap->pio_mask = 1;
  70         ap->flags |= ATA_FLAG_SLAVE_POSS;
  71
  72         ap->ioaddr.cmd_addr = cmd_addr;
  73
  74         if (pnp_port_valid(idev, 1) == 0) {
  75                 ctl_addr = devm_ioport_map(&idev->dev,
  76                                            pnp_port_start(idev, 1), 1);
  77                 ap->ioaddr.altstatus_addr = ctl_addr;
  78                 ap->ioaddr.ctl_addr = ctl_addr;
  79         }
  80
  81         ata_sff_std_ports(&ap->ioaddr);
  82
  83         ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
  84                       (unsigned long long)pnp_port_start(idev, 0),
  85                       (unsigned long long)pnp_port_start(idev, 1));
  86
  87         /* activate */
  88         return ata_host_activate(host, irq, handler, 0,
  89                                  &isapnp_sht);
  90 }
  91
  92 /**
  93  *      isapnp_remove_one       -       unplug an isapnp interface
  94  *      @idev: PnP device
  95  *
  96  *      Remove a previously configured PnP ATA port. Called only on module
  97  *      unload events as the core does not currently deal with ISAPnP docking.
  98  */
  99
 100 static void isapnp_remove_one(struct pnp_dev *idev)
 101 {
 102         struct device *dev = &idev->dev;
 103         struct ata_host *host = dev_get_drvdata(dev);
 104
 105         ata_host_detach(host);
 106 }
 107
 108 static struct pnp_device_id isapnp_devices[] = {
 109         /* Generic ESDI/IDE/ATA compatible hard disk controller */
 110         {.id = "PNP0600", .driver_data = 0},
 111         {.id = ""}
 112 };
 113
 114 MODULE_DEVICE_TABLE(pnp, isapnp_devices);
 115
 116 static struct pnp_driver isapnp_driver = {
 117         .name           = DRV_NAME,
 118         .id_table       = isapnp_devices,
 119         .probe          = isapnp_init_one,
 120         .remove         = isapnp_remove_one,
 121 };
 122
 123 static int __init isapnp_init(void)
 124 {
 125         return pnp_register_driver(&isapnp_driver);
 126 }
 127
 128 static void __exit isapnp_exit(void)
 129 {
 130         pnp_unregister_driver(&isapnp_driver);
 131 }
 132
 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
 138 module_init(isapnp_init);
 139 module_exit(isapnp_exit);