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 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 int __init ide_4drives_init(void)
  15 {
  16         ide_hwif_t *hwif, *mate;
  17         unsigned long base = 0x1f0, ctl = 0x3f6;
  18         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
  19         hw_regs_t hw;
  20
  21         if (probe_4drives == 0)
  22                 return -ENODEV;
  23
  24         if (!request_region(base, 8, DRV_NAME)) {
  25                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  26                                 DRV_NAME, base, base + 7);
  27                 return -EBUSY;
  28         }
  29
  30         if (!request_region(ctl, 1, DRV_NAME)) {
  31                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  32                                 DRV_NAME, ctl);
  33                 release_region(base, 8);
  34                 return -EBUSY;
  35         }
  36
  37         memset(&hw, 0, sizeof(hw));
  38
  39         ide_std_init_ports(&hw, base, ctl);
  40         hw.irq = 14;
  41         hw.chipset = ide_4drives;
  42
  43         hwif = ide_find_port();
  44         if (hwif) {
  45                 ide_init_port_hw(hwif, &hw);
  46                 hwif->mmio = 1;
  47                 idx[0] = hwif->index;
  48         }
  49
  50         mate = ide_find_port();
  51         if (mate) {
  52                 ide_init_port_hw(mate, &hw);
  53                 mate->drives[0].select.all ^= 0x20;
  54                 mate->drives[1].select.all ^= 0x20;
  55                 mate->mmio = 1;
  56                 idx[1] = mate->index;
  57
  58                 if (hwif) {
  59                         hwif->mate = mate;
  60                         mate->mate = hwif;
  61                         hwif->serialized = mate->serialized = 1;
  62                 }
  63         }
  64
  65         ide_device_add(idx, NULL);
  66
  67         return 0;
  68 }
  69
  70 module_init(ide_4drives_init);
  71
  72 MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
  73 MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
  74 MODULE_LICENSE("GPL");