mirror of https://gitee.com/openkylin/linux.git
137 lines
3.2 KiB
C
137 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
|
|
/*
|
|
* pata-isapnp.c - ISA PnP PATA controller driver.
|
|
* Copyright 2005/2006 Red Hat Inc, all rights reserved.
|
|
*
|
|
* Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
|
|
*/
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/isapnp.h>
|
|
#include <linux/init.h>
|
|
#include <linux/blkdev.h>
|
|
#include <linux/delay.h>
|
|
#include <scsi/scsi_host.h>
|
|
#include <linux/ata.h>
|
|
#include <linux/libata.h>
|
|
|
|
#define DRV_NAME "pata_isapnp"
|
|
#define DRV_VERSION "0.2.5"
|
|
|
|
static struct scsi_host_template isapnp_sht = {
|
|
ATA_PIO_SHT(DRV_NAME),
|
|
};
|
|
|
|
static struct ata_port_operations isapnp_port_ops = {
|
|
.inherits = &ata_sff_port_ops,
|
|
.cable_detect = ata_cable_40wire,
|
|
};
|
|
|
|
static struct ata_port_operations isapnp_noalt_port_ops = {
|
|
.inherits = &ata_sff_port_ops,
|
|
.cable_detect = ata_cable_40wire,
|
|
/* No altstatus so we don't want to use the lost interrupt poll */
|
|
.lost_interrupt = ATA_OP_NULL,
|
|
};
|
|
|
|
/**
|
|
* isapnp_init_one - attach an isapnp interface
|
|
* @idev: PnP device
|
|
* @dev_id: matching detect line
|
|
*
|
|
* Register an ISA bus IDE interface. Such interfaces are PIO 0 and
|
|
* non shared IRQ.
|
|
*/
|
|
|
|
static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
|
|
{
|
|
struct ata_host *host;
|
|
struct ata_port *ap;
|
|
void __iomem *cmd_addr, *ctl_addr;
|
|
int irq = 0;
|
|
irq_handler_t handler = NULL;
|
|
|
|
if (pnp_port_valid(idev, 0) == 0)
|
|
return -ENODEV;
|
|
|
|
if (pnp_irq_valid(idev, 0)) {
|
|
irq = pnp_irq(idev, 0);
|
|
handler = ata_sff_interrupt;
|
|
}
|
|
|
|
/* allocate host */
|
|
host = ata_host_alloc(&idev->dev, 1);
|
|
if (!host)
|
|
return -ENOMEM;
|
|
|
|
/* acquire resources and fill host */
|
|
cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
|
|
if (!cmd_addr)
|
|
return -ENOMEM;
|
|
|
|
ap = host->ports[0];
|
|
|
|
ap->ops = &isapnp_noalt_port_ops;
|
|
ap->pio_mask = ATA_PIO0;
|
|
ap->flags |= ATA_FLAG_SLAVE_POSS;
|
|
|
|
ap->ioaddr.cmd_addr = cmd_addr;
|
|
|
|
if (pnp_port_valid(idev, 1)) {
|
|
ctl_addr = devm_ioport_map(&idev->dev,
|
|
pnp_port_start(idev, 1), 1);
|
|
ap->ioaddr.altstatus_addr = ctl_addr;
|
|
ap->ioaddr.ctl_addr = ctl_addr;
|
|
ap->ops = &isapnp_port_ops;
|
|
}
|
|
|
|
ata_sff_std_ports(&ap->ioaddr);
|
|
|
|
ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
|
|
(unsigned long long)pnp_port_start(idev, 0),
|
|
(unsigned long long)pnp_port_start(idev, 1));
|
|
|
|
/* activate */
|
|
return ata_host_activate(host, irq, handler, 0,
|
|
&isapnp_sht);
|
|
}
|
|
|
|
/**
|
|
* isapnp_remove_one - unplug an isapnp interface
|
|
* @idev: PnP device
|
|
*
|
|
* Remove a previously configured PnP ATA port. Called only on module
|
|
* unload events as the core does not currently deal with ISAPnP docking.
|
|
*/
|
|
|
|
static void isapnp_remove_one(struct pnp_dev *idev)
|
|
{
|
|
struct device *dev = &idev->dev;
|
|
struct ata_host *host = dev_get_drvdata(dev);
|
|
|
|
ata_host_detach(host);
|
|
}
|
|
|
|
static struct pnp_device_id isapnp_devices[] = {
|
|
/* Generic ESDI/IDE/ATA compatible hard disk controller */
|
|
{.id = "PNP0600", .driver_data = 0},
|
|
{.id = ""}
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pnp, isapnp_devices);
|
|
|
|
static struct pnp_driver isapnp_driver = {
|
|
.name = DRV_NAME,
|
|
.id_table = isapnp_devices,
|
|
.probe = isapnp_init_one,
|
|
.remove = isapnp_remove_one,
|
|
};
|
|
|
|
module_pnp_driver(isapnp_driver);
|
|
MODULE_AUTHOR("Alan Cox");
|
|
MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_VERSION(DRV_VERSION);
|