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 "0.2.1"
  21
  22 static struct scsi_host_template isapnp_sht = {
  23         .module                 = THIS_MODULE,
  24         .name                   = DRV_NAME,
  25         .ioctl                  = ata_scsi_ioctl,
  26         .queuecommand           = ata_scsi_queuecmd,
  27         .can_queue              = ATA_DEF_QUEUE,
  28         .this_id                = ATA_SHT_THIS_ID,
  29         .sg_tablesize           = LIBATA_MAX_PRD,
  30         .cmd_per_lun            = ATA_SHT_CMD_PER_LUN,
  31         .emulated               = ATA_SHT_EMULATED,
  32         .use_clustering         = ATA_SHT_USE_CLUSTERING,
  33         .proc_name              = DRV_NAME,
  34         .dma_boundary           = ATA_DMA_BOUNDARY,
  35         .slave_configure        = ata_scsi_slave_config,
  36         .slave_destroy          = ata_scsi_slave_destroy,
  37         .bios_param             = ata_std_bios_param,
  38 };
  39
  40 static struct ata_port_operations isapnp_port_ops = {
  41         .port_disable   = ata_port_disable,
  42         .tf_load        = ata_tf_load,
  43         .tf_read        = ata_tf_read,
  44         .check_status   = ata_check_status,
  45         .exec_command   = ata_exec_command,
  46         .dev_select     = ata_std_dev_select,
  47
  48         .freeze         = ata_bmdma_freeze,
  49         .thaw           = ata_bmdma_thaw,
  50         .error_handler  = ata_bmdma_error_handler,
  51         .post_internal_cmd = ata_bmdma_post_internal_cmd,
  52         .cable_detect   = ata_cable_40wire,
  53
  54         .qc_prep        = ata_qc_prep,
  55         .qc_issue       = ata_qc_issue_prot,
  56
  57         .data_xfer      = ata_data_xfer,
  58
  59         .irq_clear      = ata_bmdma_irq_clear,
  60         .irq_on         = ata_irq_on,
  61         .irq_ack        = ata_irq_ack,
  62
  63         .port_start     = ata_port_start,
  64 };
  65
  66 /**
  67  *      isapnp_init_one         -       attach an isapnp interface
  68  *      @idev: PnP device
  69  *      @dev_id: matching detect line
  70  *
  71  *      Register an ISA bus IDE interface. Such interfaces are PIO 0 and
  72  *      non shared IRQ.
  73  */
  74
  75 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
  76 {
  77         struct ata_host *host;
  78         struct ata_port *ap;
  79         void __iomem *cmd_addr, *ctl_addr;
  80
  81         if (pnp_port_valid(idev, 0) == 0)
  82                 return -ENODEV;
  83
  84         /* FIXME: Should selected polled PIO here not fail */
  85         if (pnp_irq_valid(idev, 0) == 0)
  86                 return -ENODEV;
  87
  88         /* allocate host */
  89         host = ata_host_alloc(&idev->dev, 1);
  90         if (!host)
  91                 return -ENOMEM;
  92
  93         /* acquire resources and fill host */
  94         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
  95         if (!cmd_addr)
  96                 return -ENOMEM;
  97
  98         ap = host->ports[0];
  99
 100         ap->ops = &isapnp_port_ops;
 101         ap->pio_mask = 1;
 102         ap->flags |= ATA_FLAG_SLAVE_POSS;
 103
 104         ap->ioaddr.cmd_addr = cmd_addr;
 105
 106         if (pnp_port_valid(idev, 1) == 0) {
 107                 ctl_addr = devm_ioport_map(&idev->dev,
 108                                            pnp_port_start(idev, 1), 1);
 109                 ap->ioaddr.altstatus_addr = ctl_addr;
 110                 ap->ioaddr.ctl_addr = ctl_addr;
 111         }
 112
 113         ata_std_ports(&ap->ioaddr);
 114
 115         /* activate */
 116         return ata_host_activate(host, pnp_irq(idev, 0), ata_interrupt, 0,
 117                                  &isapnp_sht);
 118 }
 119
 120 /**
 121  *      isapnp_remove_one       -       unplug an isapnp interface
 122  *      @idev: PnP device
 123  *
 124  *      Remove a previously configured PnP ATA port. Called only on module
 125  *      unload events as the core does not currently deal with ISAPnP docking.
 126  */
 127
 128 static void isapnp_remove_one(struct pnp_dev *idev)
 129 {
 130         struct device *dev = &idev->dev;
 131         struct ata_host *host = dev_get_drvdata(dev);
 132
 133         ata_host_detach(host);
 134 }
 135
 136 static struct pnp_device_id isapnp_devices[] = {
 137         /* Generic ESDI/IDE/ATA compatible hard disk controller */
 138         {.id = "PNP0600", .driver_data = 0},
 139         {.id = ""}
 140 };
 141
 142 static struct pnp_driver isapnp_driver = {
 143         .name           = DRV_NAME,
 144         .id_table       = isapnp_devices,
 145         .probe          = isapnp_init_one,
 146         .remove         = isapnp_remove_one,
 147 };
 148
 149 static int __init isapnp_init(void)
 150 {
 151         return pnp_register_driver(&isapnp_driver);
 152 }
 153
 154 static void __exit isapnp_exit(void)
 155 {
 156         pnp_unregister_driver(&isapnp_driver);
 157 }
 158
 159 MODULE_AUTHOR("Alan Cox");
 160 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
 161 MODULE_LICENSE("GPL");
 162 MODULE_VERSION(DRV_VERSION);
 163
 164 module_init(isapnp_init);
 165 module_exit(isapnp_exit);