LXR linux/drivers/ata/pata

   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
  23static struct scsi_host_template isapnp_sht = {
  24        ATA_PIO_SHT(DRV_NAME),
  25};
  26
  27static struct ata_port_operations isapnp_port_ops = {
  28        .inherits       = &ata_sff_port_ops,
  29        .cable_detect   = ata_cable_40wire,
  30};
  31
  32static 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
  48static 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
 109static 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
 117static 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
 123MODULE_DEVICE_TABLE(pnp, isapnp_devices);
 124
 125static 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
 132module_pnp_driver(isapnp_driver);
 133MODULE_AUTHOR("Alan Cox");
 134MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
 135MODULE_LICENSE("GPL");
 136MODULE_VERSION(DRV_VERSION);
 137