/*
* pata-isapnp.c - ISA PnP PATA controller driver.
* Copyright 2005/2006 Red Hat Inc <alan@redhat.com>, 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 "0.2.2"
static struct scsi_host_template isapnp_sht = {
.module = THIS_MODULE,
.name = DRV_NAME,
.ioctl = ata_scsi_ioctl,
.queuecommand = ata_scsi_queuecmd,
.can_queue = ATA_DEF_QUEUE,
.this_id = ATA_SHT_THIS_ID,
.sg_tablesize = LIBATA_MAX_PRD,
.cmd_per_lun = ATA_SHT_CMD_PER_LUN,
.emulated = ATA_SHT_EMULATED,
.use_clustering = ATA_SHT_USE_CLUSTERING,
.proc_name = DRV_NAME,
.dma_boundary = ATA_DMA_BOUNDARY,
.slave_configure = ata_scsi_slave_config,
.slave_destroy = ata_scsi_slave_destroy,
.bios_param = ata_std_bios_param,
};
static struct ata_port_operations isapnp_port_ops = {
.tf_load = ata_tf_load,
.tf_read = ata_tf_read,
.check_status = ata_check_status,
.exec_command = ata_exec_command,
.dev_select = ata_std_dev_select,
.freeze = ata_bmdma_freeze,
.thaw = ata_bmdma_thaw,
.error_handler = ata_bmdma_error_handler,
.post_internal_cmd = ata_bmdma_post_internal_cmd,
.cable_detect = ata_cable_40wire,
.qc_prep = ata_qc_prep,
.qc_issue = ata_qc_issue_prot,
.data_xfer = ata_data_xfer,
.irq_clear = ata_bmdma_irq_clear,
.irq_on = ata_irq_on,
.port_start = ata_sff_port_start,
};
/**
* 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;
if (pnp_port_valid(idev, 0) == 0)
return -ENODEV;
/* FIXME: Should selected polled PIO here not fail */
if (pnp_irq_valid(idev, 0) == 0)
return -ENODEV;
/* 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_port_ops;
ap->pio_mask = 1;
ap->flags |= ATA_FLAG_SLAVE_POSS;
ap->ioaddr.cmd_addr = cmd_addr;
if (pnp_port_valid(idev, 1) == 0) {
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;
}
ata_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, pnp_irq(idev, 0), ata_interrupt, 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,
};
static int __init isapnp_init(void)
{
return pnp_register_driver(&isapnp_driver);
}
static void __exit isapnp_exit(void)
{
pnp_unregister_driver(&isapnp_driver);
}
MODULE_AUTHOR("Alan Cox");
MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
MODULE_LICENSE("GPL");
MODULE_VERSION(DRV_VERSION);
module_init(isapnp_init);
module_exit(isapnp_exit);
