linux/drivers/ide/ide-4drives.c
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   1
   2#include <linux/kernel.h>
   3#include <linux/init.h>
   4#include <linux/module.h>
   5#include <linux/ide.h>
   6
   7#define DRV_NAME "ide-4drives"
   8
   9static bool probe_4drives;
  10
  11module_param_named(probe, probe_4drives, bool, 0);
  12MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
  13
  14static void ide_4drives_init_dev(ide_drive_t *drive)
  15{
  16        if (drive->hwif->channel)
  17                drive->select ^= 0x20;
  18}
  19
  20static const struct ide_port_ops ide_4drives_port_ops = {
  21        .init_dev               = ide_4drives_init_dev,
  22};
  23
  24static const struct ide_port_info ide_4drives_port_info = {
  25        .port_ops               = &ide_4drives_port_ops,
  26        .host_flags             = IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA |
  27                                  IDE_HFLAG_4DRIVES,
  28        .chipset                = ide_4drives,
  29};
  30
  31static int __init ide_4drives_init(void)
  32{
  33        unsigned long base = 0x1f0, ctl = 0x3f6;
  34        struct ide_hw hw, *hws[] = { &hw, &hw };
  35
  36        if (probe_4drives == 0)
  37                return -ENODEV;
  38
  39        if (!request_region(base, 8, DRV_NAME)) {
  40                printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  41                                DRV_NAME, base, base + 7);
  42                return -EBUSY;
  43        }
  44
  45        if (!request_region(ctl, 1, DRV_NAME)) {
  46                printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  47                                DRV_NAME, ctl);
  48                release_region(base, 8);
  49                return -EBUSY;
  50        }
  51
  52        memset(&hw, 0, sizeof(hw));
  53
  54        ide_std_init_ports(&hw, base, ctl);
  55        hw.irq = 14;
  56
  57        return ide_host_add(&ide_4drives_port_info, hws, 2, NULL);
  58}
  59
  60module_init(ide_4drives_init);
  61
  62MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
  63MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
  64MODULE_LICENSE("GPL");
  65
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