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 "0.1.5"
  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
  53         .qc_prep        = ata_qc_prep,
  54         .qc_issue       = ata_qc_issue_prot,
  55
  56         .data_xfer      = ata_data_xfer,
  57
  58         .irq_handler    = ata_interrupt,
  59         .irq_clear      = ata_bmdma_irq_clear,
  60
  61         .port_start     = ata_port_start,
  62 };
  63
  64 /**
  65  *      isapnp_init_one         -       attach an isapnp interface
  66  *      @idev: PnP device
  67  *      @dev_id: matching detect line
  68  *
  69  *      Register an ISA bus IDE interface. Such interfaces are PIO 0 and
  70  *      non shared IRQ.
  71  */
  72
  73 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
  74 {
  75         struct ata_probe_ent ae;
  76         void __iomem *cmd_addr, *ctl_addr;
  77
  78         if (pnp_port_valid(idev, 0) == 0)
  79                 return -ENODEV;
  80
  81         /* FIXME: Should selected polled PIO here not fail */
  82         if (pnp_irq_valid(idev, 0) == 0)
  83                 return -ENODEV;
  84
  85         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
  86         if (!cmd_addr)
  87                 return -ENOMEM;
  88
  89         memset(&ae, 0, sizeof(struct ata_probe_ent));
  90         INIT_LIST_HEAD(&ae.node);
  91         ae.dev = &idev->dev;
  92         ae.port_ops = &isapnp_port_ops;
  93         ae.sht = &isapnp_sht;
  94         ae.n_ports = 1;
  95         ae.pio_mask = 1;                /* ISA so PIO 0 cycles */
  96         ae.irq = pnp_irq(idev, 0);
  97         ae.irq_flags = 0;
  98         ae.port_flags = ATA_FLAG_SLAVE_POSS;
  99         ae.port[0].cmd_addr = cmd_addr;
 100
 101         if (pnp_port_valid(idev, 1) == 0) {
 102                 ctl_addr = devm_ioport_map(&idev->dev,
 103                                            pnp_port_start(idev, 1), 1);
 104                 ae.port[0].altstatus_addr = ctl_addr;
 105                 ae.port[0].ctl_addr = ctl_addr;
 106                 ae.port_flags |= ATA_FLAG_SRST;
 107         }
 108         ata_std_ports(&ae.port[0]);
 109
 110         if (ata_device_add(&ae) == 0)
 111                 return -ENODEV;
 112         return 0;
 113 }
 114
 115 /**
 116  *      isapnp_remove_one       -       unplug an isapnp interface
 117  *      @idev: PnP device
 118  *
 119  *      Remove a previously configured PnP ATA port. Called only on module
 120  *      unload events as the core does not currently deal with ISAPnP docking.
 121  */
 122
 123 static void isapnp_remove_one(struct pnp_dev *idev)
 124 {
 125         struct device *dev = &idev->dev;
 126         struct ata_host *host = dev_get_drvdata(dev);
 127
 128         ata_host_detach(host);
 129         dev_set_drvdata(dev, NULL);
 130 }
 131
 132 static struct pnp_device_id isapnp_devices[] = {
 133         /* Generic ESDI/IDE/ATA compatible hard disk controller */
 134         {.id = "PNP0600", .driver_data = 0},
 135         {.id = ""}
 136 };
 137
 138 static struct pnp_driver isapnp_driver = {
 139         .name           = DRV_NAME,
 140         .id_table       = isapnp_devices,
 141         .probe          = isapnp_init_one,
 142         .remove         = isapnp_remove_one,
 143 };
 144
 145 static int __init isapnp_init(void)
 146 {
 147         return pnp_register_driver(&isapnp_driver);
 148 }
 149
 150 static void __exit isapnp_exit(void)
 151 {
 152         pnp_unregister_driver(&isapnp_driver);
 153 }
 154
 155 MODULE_AUTHOR("Alan Cox");
 156 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
 157 MODULE_LICENSE("GPL");
 158 MODULE_VERSION(DRV_VERSION);
 159
 160 module_init(isapnp_init);
 161 module_exit(isapnp_exit);