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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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#define DRV_NAME "ide-4drives"
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static bool probe_4drives;
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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 void ide_4drives_init_dev(ide_drive_t *drive)
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{
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if (drive->hwif->channel)
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drive->select ^= 0x20;
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}
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static const struct ide_port_ops ide_4drives_port_ops = {
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.init_dev = ide_4drives_init_dev,
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};
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static const struct ide_port_info ide_4drives_port_info = {
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.port_ops = &ide_4drives_port_ops,
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.host_flags = IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA |
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IDE_HFLAG_4DRIVES,
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.chipset = ide_4drives,
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};
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static int __init ide_4drives_init(void)
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{
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unsigned long base = 0x1f0, ctl = 0x3f6;
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struct ide_hw hw, *hws[] = { &hw, &hw };
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if (probe_4drives == 0)
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return -ENODEV;
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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 = 14;
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return ide_host_add(&ide_4drives_port_info, hws, 2, NULL);
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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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