drivers/ide/legacy/ide-4drives.c

   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
   9 static int probe_4drives;
  10
  11 module_param_named(probe, probe_4drives, bool, 0);
  12 MODULE_PARM_DESC(probe, "probe for generic IDE chipset with 4 drives/port");
  13
  14 static void ide_4drives_init_dev(ide_drive_t *drive)
  15 {
  16         if (drive->hwif->channel)
  17                 drive->select.all ^= 0x20;
  18 }
  19
  20 static const struct ide_port_ops ide_4drives_port_ops = {
  21         .init_dev               = ide_4drives_init_dev,
  22 };
  23
  24 static 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 };
  28
  29 static int __init ide_4drives_init(void)
  30 {
  31         ide_hwif_t *hwif, *mate;
  32         unsigned long base = 0x1f0, ctl = 0x3f6;
  33         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
  34         hw_regs_t 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         hw.chipset = ide_4drives;
  57
  58         hwif = ide_find_port();
  59         if (hwif) {
  60                 ide_init_port_hw(hwif, &hw);
  61                 idx[0] = hwif->index;
  62         }
  63
  64         mate = ide_find_port();
  65         if (mate) {
  66                 ide_init_port_hw(mate, &hw);
  67                 idx[1] = mate->index;
  68         }
  69
  70         ide_device_add(idx, &ide_4drives_port_info);
  71
  72         return 0;
  73 }
  74
  75 module_init(ide_4drives_init);
  76
  77 MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
  78 MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
  79 MODULE_LICENSE("GPL");