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         .tf_load        = ata_tf_load,
  28         .tf_read        = ata_tf_read,
  29         .check_status   = ata_check_status,
  30         .exec_command   = ata_exec_command,
  31         .dev_select     = ata_std_dev_select,
  32
  33         .freeze         = ata_bmdma_freeze,
  34         .thaw           = ata_bmdma_thaw,
  35         .error_handler  = ata_bmdma_error_handler,
  36         .post_internal_cmd = ata_bmdma_post_internal_cmd,
  37         .cable_detect   = ata_cable_40wire,
  38
  39         .qc_prep        = ata_qc_prep,
  40         .qc_issue       = ata_qc_issue_prot,
  41
  42         .data_xfer      = ata_data_xfer,
  43
  44         .irq_clear      = ata_noop_irq_clear,
  45         .irq_on         = ata_irq_on,
  46
  47         .port_start     = ata_sff_port_start,
  48 };
  49
  50 /**
  51  *      isapnp_init_one         -       attach an isapnp interface
  52  *      @idev: PnP device
  53  *      @dev_id: matching detect line
  54  *
  55  *      Register an ISA bus IDE interface. Such interfaces are PIO 0 and
  56  *      non shared IRQ.
  57  */
  58
  59 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
  60 {
  61         struct ata_host *host;
  62         struct ata_port *ap;
  63         void __iomem *cmd_addr, *ctl_addr;
  64         int irq = 0;
  65         irq_handler_t handler = NULL;
  66
  67         if (pnp_port_valid(idev, 0) == 0)
  68                 return -ENODEV;
  69
  70         if (pnp_irq_valid(idev, 0)) {
  71                 irq = pnp_irq(idev, 0);
  72                 handler = ata_interrupt;
  73         }
  74
  75         /* allocate host */
  76         host = ata_host_alloc(&idev->dev, 1);
  77         if (!host)
  78                 return -ENOMEM;
  79
  80         /* acquire resources and fill host */
  81         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
  82         if (!cmd_addr)
  83                 return -ENOMEM;
  84
  85         ap = host->ports[0];
  86
  87         ap->ops = &isapnp_port_ops;
  88         ap->pio_mask = 1;
  89         ap->flags |= ATA_FLAG_SLAVE_POSS;
  90
  91         ap->ioaddr.cmd_addr = cmd_addr;
  92
  93         if (pnp_port_valid(idev, 1) == 0) {
  94                 ctl_addr = devm_ioport_map(&idev->dev,
  95                                            pnp_port_start(idev, 1), 1);
  96                 ap->ioaddr.altstatus_addr = ctl_addr;
  97                 ap->ioaddr.ctl_addr = ctl_addr;
  98         }
  99
 100         ata_std_ports(&ap->ioaddr);
 101
 102         ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
 103                       (unsigned long long)pnp_port_start(idev, 0),
 104                       (unsigned long long)pnp_port_start(idev, 1));
 105
 106         /* activate */
 107         return ata_host_activate(host, irq, handler, 0,
 108                                  &isapnp_sht);
 109 }
 110
 111 /**
 112  *      isapnp_remove_one       -       unplug an isapnp interface
 113  *      @idev: PnP device
 114  *
 115  *      Remove a previously configured PnP ATA port. Called only on module
 116  *      unload events as the core does not currently deal with ISAPnP docking.
 117  */
 118
 119 static void isapnp_remove_one(struct pnp_dev *idev)
 120 {
 121         struct device *dev = &idev->dev;
 122         struct ata_host *host = dev_get_drvdata(dev);
 123
 124         ata_host_detach(host);
 125 }
 126
 127 static struct pnp_device_id isapnp_devices[] = {
 128         /* Generic ESDI/IDE/ATA compatible hard disk controller */
 129         {.id = "PNP0600", .driver_data = 0},
 130         {.id = ""}
 131 };
 132
 133 MODULE_DEVICE_TABLE(pnp, isapnp_devices);
 134
 135 static struct pnp_driver isapnp_driver = {
 136         .name           = DRV_NAME,
 137         .id_table       = isapnp_devices,
 138         .probe          = isapnp_init_one,
 139         .remove         = isapnp_remove_one,
 140 };
 141
 142 static int __init isapnp_init(void)
 143 {
 144         return pnp_register_driver(&isapnp_driver);
 145 }
 146
 147 static void __exit isapnp_exit(void)
 148 {
 149         pnp_unregister_driver(&isapnp_driver);
 150 }
 151
 152 MODULE_AUTHOR("Alan Cox");
 153 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
 154 MODULE_LICENSE("GPL");
 155 MODULE_VERSION(DRV_VERSION);
 156
 157 module_init(isapnp_init);
 158 module_exit(isapnp_exit);