drivers/ata/pata_isapnp.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2
   3 /*
   4  *   pata-isapnp.c - ISA PnP PATA controller driver.
   5  *   Copyright 2005/2006 Red Hat Inc, all rights reserved.
   6  *
   7  *   Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/module.h>
  12 #include <linux/isapnp.h>
  13 #include <linux/init.h>
  14 #include <linux/blkdev.h>
  15 #include <linux/delay.h>
  16 #include <scsi/scsi_host.h>
  17 #include <linux/ata.h>
  18 #include <linux/libata.h>
  19
  20 #define DRV_NAME "pata_isapnp"
  21 #define DRV_VERSION "0.2.5"
  22
  23 static struct scsi_host_template isapnp_sht = {
  24         ATA_PIO_SHT(DRV_NAME),
  25 };
  26
  27 static struct ata_port_operations isapnp_port_ops = {
  28         .inherits       = &ata_sff_port_ops,
  29         .cable_detect   = ata_cable_40wire,
  30 };
  31
  32 static struct ata_port_operations isapnp_noalt_port_ops = {
  33         .inherits       = &ata_sff_port_ops,
  34         .cable_detect   = ata_cable_40wire,
  35         /* No altstatus so we don't want to use the lost interrupt poll */
  36         .lost_interrupt = ATA_OP_NULL,
  37 };
  38
  39 /**
  40  *      isapnp_init_one         -       attach an isapnp interface
  41  *      @idev: PnP device
  42  *      @dev_id: matching detect line
  43  *
  44  *      Register an ISA bus IDE interface. Such interfaces are PIO 0 and
  45  *      non shared IRQ.
  46  */
  47
  48 static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
  49 {
  50         struct ata_host *host;
  51         struct ata_port *ap;
  52         void __iomem *cmd_addr, *ctl_addr;
  53         int irq = 0;
  54         irq_handler_t handler = NULL;
  55
  56         if (pnp_port_valid(idev, 0) == 0)
  57                 return -ENODEV;
  58
  59         if (pnp_irq_valid(idev, 0)) {
  60                 irq = pnp_irq(idev, 0);
  61                 handler = ata_sff_interrupt;
  62         }
  63
  64         /* allocate host */
  65         host = ata_host_alloc(&idev->dev, 1);
  66         if (!host)
  67                 return -ENOMEM;
  68
  69         /* acquire resources and fill host */
  70         cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
  71         if (!cmd_addr)
  72                 return -ENOMEM;
  73
  74         ap = host->ports[0];
  75
  76         ap->ops = &isapnp_noalt_port_ops;
  77         ap->pio_mask = ATA_PIO0;
  78         ap->flags |= ATA_FLAG_SLAVE_POSS;
  79
  80         ap->ioaddr.cmd_addr = cmd_addr;
  81
  82         if (pnp_port_valid(idev, 1)) {
  83                 ctl_addr = devm_ioport_map(&idev->dev,
  84                                            pnp_port_start(idev, 1), 1);
  85                 ap->ioaddr.altstatus_addr = ctl_addr;
  86                 ap->ioaddr.ctl_addr = ctl_addr;
  87                 ap->ops = &isapnp_port_ops;
  88         }
  89
  90         ata_sff_std_ports(&ap->ioaddr);
  91
  92         ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
  93                       (unsigned long long)pnp_port_start(idev, 0),
  94                       (unsigned long long)pnp_port_start(idev, 1));
  95
  96         /* activate */
  97         return ata_host_activate(host, irq, handler, 0,
  98                                  &isapnp_sht);
  99 }
 100
 101 /**
 102  *      isapnp_remove_one       -       unplug an isapnp interface
 103  *      @idev: PnP device
 104  *
 105  *      Remove a previously configured PnP ATA port. Called only on module
 106  *      unload events as the core does not currently deal with ISAPnP docking.
 107  */
 108
 109 static void isapnp_remove_one(struct pnp_dev *idev)
 110 {
 111         struct device *dev = &idev->dev;
 112         struct ata_host *host = dev_get_drvdata(dev);
 113
 114         ata_host_detach(host);
 115 }
 116
 117 static struct pnp_device_id isapnp_devices[] = {
 118         /* Generic ESDI/IDE/ATA compatible hard disk controller */
 119         {.id = "PNP0600", .driver_data = 0},
 120         {.id = ""}
 121 };
 122
 123 MODULE_DEVICE_TABLE(pnp, isapnp_devices);
 124
 125 static struct pnp_driver isapnp_driver = {
 126         .name           = DRV_NAME,
 127         .id_table       = isapnp_devices,
 128         .probe          = isapnp_init_one,
 129         .remove         = isapnp_remove_one,
 130 };
 131
 132 module_pnp_driver(isapnp_driver);
 133 MODULE_AUTHOR("Alan Cox");
 134 MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
 135 MODULE_LICENSE("GPL");
 136 MODULE_VERSION(DRV_VERSION);