d427e836d1
ide_find_port() now depends on ->chipset being set for occupied ide_hwifs[] slots so all host drivers have to initialize hwif->chipset properly. This patch fixes a regression on hosts with > 1 port or with a single port but no devices attached to it for an affected host drivers. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
/*
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* This file provides autodetection for ISA PnP IDE interfaces.
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* It was tested with "ESS ES1868 Plug and Play AudioDrive" IDE interface.
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*
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* Copyright (C) 2000 Andrey Panin <pazke@donpac.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* You should have received a copy of the GNU General Public License
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* (for example /usr/src/linux/COPYING); if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/init.h>
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#include <linux/pnp.h>
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#include <linux/ide.h>
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#define DRV_NAME "ide-pnp"
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/* Add your devices here :)) */
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static struct pnp_device_id idepnp_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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static int idepnp_probe(struct pnp_dev *dev, const struct pnp_device_id *dev_id)
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{
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hw_regs_t hw;
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ide_hwif_t *hwif;
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unsigned long base, ctl;
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if (!(pnp_port_valid(dev, 0) && pnp_port_valid(dev, 1) && pnp_irq_valid(dev, 0)))
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return -1;
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base = pnp_port_start(dev, 0);
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ctl = pnp_port_start(dev, 1);
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if (!request_region(base, 8, DRV_NAME)) {
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printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
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DRV_NAME, base, base + 7);
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return -EBUSY;
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}
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if (!request_region(ctl, 1, DRV_NAME)) {
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printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
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DRV_NAME, ctl);
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release_region(base, 8);
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return -EBUSY;
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}
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memset(&hw, 0, sizeof(hw));
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ide_std_init_ports(&hw, base, ctl);
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hw.irq = pnp_irq(dev, 0);
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hw.chipset = ide_generic;
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hwif = ide_find_port();
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if (hwif) {
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u8 index = hwif->index;
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u8 idx[4] = { index, 0xff, 0xff, 0xff };
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ide_init_port_data(hwif, index);
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ide_init_port_hw(hwif, &hw);
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printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
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pnp_set_drvdata(dev, hwif);
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ide_device_add(idx, NULL);
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return 0;
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}
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release_region(ctl, 1);
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release_region(base, 8);
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return -1;
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}
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static void idepnp_remove(struct pnp_dev *dev)
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{
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ide_hwif_t *hwif = pnp_get_drvdata(dev);
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ide_unregister(hwif);
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release_region(pnp_port_start(dev, 1), 1);
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release_region(pnp_port_start(dev, 0), 8);
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}
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static struct pnp_driver idepnp_driver = {
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.name = "ide",
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.id_table = idepnp_devices,
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.probe = idepnp_probe,
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.remove = idepnp_remove,
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};
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static int __init pnpide_init(void)
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{
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return pnp_register_driver(&idepnp_driver);
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}
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static void __exit pnpide_exit(void)
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{
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pnp_unregister_driver(&idepnp_driver);
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}
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module_init(pnpide_init);
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module_exit(pnpide_exit);
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MODULE_LICENSE("GPL");
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