fc0012ec53
The test for 2nd I/O port validity is broken (reversed): On devices with no control port, the driver attempts to use invalid port 0, resulting in logs full of bad_io_access errors. On devices with control port, the driver does not use it. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Tejun Heo <tj@kernel.org>
147 lines
3.4 KiB
C
147 lines
3.4 KiB
C
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/*
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* pata-isapnp.c - ISA PnP PATA controller driver.
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* Copyright 2005/2006 Red Hat Inc, all rights reserved.
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*
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* Based in part on ide-pnp.c by Andrey Panin <pazke@donpac.ru>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/isapnp.h>
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#include <linux/init.h>
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#include <linux/blkdev.h>
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#include <linux/delay.h>
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#include <scsi/scsi_host.h>
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#include <linux/ata.h>
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#include <linux/libata.h>
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#define DRV_NAME "pata_isapnp"
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#define DRV_VERSION "0.2.5"
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static struct scsi_host_template isapnp_sht = {
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ATA_PIO_SHT(DRV_NAME),
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};
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static struct ata_port_operations isapnp_port_ops = {
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.inherits = &ata_sff_port_ops,
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.cable_detect = ata_cable_40wire,
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};
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static struct ata_port_operations isapnp_noalt_port_ops = {
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.inherits = &ata_sff_port_ops,
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.cable_detect = ata_cable_40wire,
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/* No altstatus so we don't want to use the lost interrupt poll */
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.lost_interrupt = ATA_OP_NULL,
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};
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/**
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* isapnp_init_one - attach an isapnp interface
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* @idev: PnP device
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* @dev_id: matching detect line
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*
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* Register an ISA bus IDE interface. Such interfaces are PIO 0 and
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* non shared IRQ.
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*/
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static int isapnp_init_one(struct pnp_dev *idev, const struct pnp_device_id *dev_id)
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{
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struct ata_host *host;
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struct ata_port *ap;
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void __iomem *cmd_addr, *ctl_addr;
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int irq = 0;
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irq_handler_t handler = NULL;
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if (pnp_port_valid(idev, 0) == 0)
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return -ENODEV;
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if (pnp_irq_valid(idev, 0)) {
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irq = pnp_irq(idev, 0);
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handler = ata_sff_interrupt;
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}
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/* allocate host */
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host = ata_host_alloc(&idev->dev, 1);
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if (!host)
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return -ENOMEM;
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/* acquire resources and fill host */
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cmd_addr = devm_ioport_map(&idev->dev, pnp_port_start(idev, 0), 8);
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if (!cmd_addr)
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return -ENOMEM;
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ap = host->ports[0];
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ap->ops = &isapnp_noalt_port_ops;
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ap->pio_mask = ATA_PIO0;
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ap->flags |= ATA_FLAG_SLAVE_POSS;
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ap->ioaddr.cmd_addr = cmd_addr;
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if (pnp_port_valid(idev, 1)) {
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ctl_addr = devm_ioport_map(&idev->dev,
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pnp_port_start(idev, 1), 1);
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ap->ioaddr.altstatus_addr = ctl_addr;
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ap->ioaddr.ctl_addr = ctl_addr;
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ap->ops = &isapnp_port_ops;
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}
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ata_sff_std_ports(&ap->ioaddr);
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ata_port_desc(ap, "cmd 0x%llx ctl 0x%llx",
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(unsigned long long)pnp_port_start(idev, 0),
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(unsigned long long)pnp_port_start(idev, 1));
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/* activate */
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return ata_host_activate(host, irq, handler, 0,
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&isapnp_sht);
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}
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/**
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* isapnp_remove_one - unplug an isapnp interface
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* @idev: PnP device
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*
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* Remove a previously configured PnP ATA port. Called only on module
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* unload events as the core does not currently deal with ISAPnP docking.
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*/
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static void isapnp_remove_one(struct pnp_dev *idev)
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{
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struct device *dev = &idev->dev;
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struct ata_host *host = dev_get_drvdata(dev);
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ata_host_detach(host);
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}
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static struct pnp_device_id isapnp_devices[] = {
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/* Generic ESDI/IDE/ATA compatible hard disk controller */
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{.id = "PNP0600", .driver_data = 0},
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{.id = ""}
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};
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MODULE_DEVICE_TABLE(pnp, isapnp_devices);
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static struct pnp_driver isapnp_driver = {
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.name = DRV_NAME,
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.id_table = isapnp_devices,
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.probe = isapnp_init_one,
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.remove = isapnp_remove_one,
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};
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static int __init isapnp_init(void)
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{
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return pnp_register_driver(&isapnp_driver);
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}
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static void __exit isapnp_exit(void)
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{
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pnp_unregister_driver(&isapnp_driver);
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}
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MODULE_AUTHOR("Alan Cox");
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MODULE_DESCRIPTION("low-level driver for ISA PnP ATA");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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module_init(isapnp_init);
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module_exit(isapnp_exit);
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