ffd4f6f0ee
CONFIG_BLK_DEV_4DRIVES deserves its own host driver: * Add drivers/ide/legacy/ide-4drives.c and move "4drives" support there. * Add ide-4drives.o in the link order after all other legacy host drivers enabled by "ide0=" options (they all are mutually exclusive). * Make ide-4drives host driver probe itself for IDE devices instead of indirectly depending on ide_generic host driver. * Add "probe" module parameter to ide-4drives and update documentation. v2: * s/paramater/parameter/ in ide.txt. (Noticed by Randy Dunlap) v3: * s/ide_4drives.probe/ide-4drives.probe/ in help entry. (Noticed by Sergei Shtylyov) Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
47 lines
959 B
C
47 lines
959 B
C
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/ide.h>
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int probe_4drives = 0;
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module_param_named(probe, probe_4drives, bool, 0);
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MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
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static int __init ide_4drives_init(void)
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{
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ide_hwif_t *hwif, *mate;
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u8 idx[4] = { 0, 1, 0xff, 0xff };
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if (probe_4drives == 0)
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return -ENODEV;
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hwif = &ide_hwifs[0];
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mate = &ide_hwifs[1];
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memcpy(mate->io_ports, hwif->io_ports, sizeof(hwif->io_ports));
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mate->irq = hwif->irq;
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mate->chipset = hwif->chipset = ide_4drives;
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mate->drives[0].select.all ^= 0x20;
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mate->drives[1].select.all ^= 0x20;
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hwif->mate = mate;
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mate->mate = hwif;
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hwif->serialized = mate->serialized = 1;
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ide_device_add(idx, NULL);
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return 0;
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}
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module_init(ide_4drives_init);
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MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
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MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
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MODULE_LICENSE("GPL");
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