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1// SPDX-License-Identifier: GPL-2.0-only2 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 const 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 interface41 * @idev: PnP device42 * @dev_id: matching detect line43 *44 * Register an ISA bus IDE interface. Such interfaces are PIO 0 and45 * 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 if (!ctl_addr)86 return -ENOMEM;87 88 ap->ioaddr.altstatus_addr = ctl_addr;89 ap->ioaddr.ctl_addr = ctl_addr;90 ap->ops = &isapnp_port_ops;91 }92 93 ata_sff_std_ports(&ap->ioaddr);94 95 ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",96 (unsigned long long)pnp_port_start(idev, 0),97 (unsigned long long)pnp_port_start(idev, 1));98 99 /* activate */100 return ata_host_activate(host, irq, handler, 0,101 &isapnp_sht);102}103 104/**105 * isapnp_remove_one - unplug an isapnp interface106 * @idev: PnP device107 *108 * Remove a previously configured PnP ATA port. Called only on module109 * unload events as the core does not currently deal with ISAPnP docking.110 */111 112static void isapnp_remove_one(struct pnp_dev *idev)113{114 struct device *dev = &idev->dev;115 struct ata_host *host = dev_get_drvdata(dev);116 117 ata_host_detach(host);118}119 120static struct pnp_device_id isapnp_devices[] = {121 /* Generic ESDI/IDE/ATA compatible hard disk controller */122 {.id = "PNP0600", .driver_data = 0},123 {.id = ""}124};125 126MODULE_DEVICE_TABLE(pnp, isapnp_devices);127 128static struct pnp_driver isapnp_driver = {129 .name = DRV_NAME,130 .id_table = isapnp_devices,131 .probe = isapnp_init_one,132 .remove = isapnp_remove_one,133};134 135module_pnp_driver(isapnp_driver);136MODULE_AUTHOR("Alan Cox");137MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");138MODULE_LICENSE("GPL");139MODULE_VERSION(DRV_VERSION);140