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_port_init_devs(ide_hwif_t *hwif)
  15 {
  16         if (hwif->channel) {
  17                 hwif->drives[0].select.all ^= 0x20;
  18                 hwif->drives[1].select.all ^= 0x20;
  19         }
  20 }
  21
  22 static const struct ide_port_ops ide_4drives_port_ops = {
  23         .port_init_devs         = ide_4drives_port_init_devs,
  24 };
  25
  26 static const struct ide_port_info ide_4drives_port_info = {
  27         .port_ops               = &ide_4drives_port_ops,
  28         .host_flags             = IDE_HFLAG_SERIALIZE | IDE_HFLAG_NO_DMA,
  29 };
  30
  31 static int __init ide_4drives_init(void)
  32 {
  33         ide_hwif_t *hwif, *mate;
  34         unsigned long base = 0x1f0, ctl = 0x3f6;
  35         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
  36         hw_regs_t hw;
  37
  38         if (probe_4drives == 0)
  39                 return -ENODEV;
  40
  41         if (!request_region(base, 8, DRV_NAME)) {
  42                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  43                                 DRV_NAME, base, base + 7);
  44                 return -EBUSY;
  45         }
  46
  47         if (!request_region(ctl, 1, DRV_NAME)) {
  48                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  49                                 DRV_NAME, ctl);
  50                 release_region(base, 8);
  51                 return -EBUSY;
  52         }
  53
  54         memset(&hw, 0, sizeof(hw));
  55
  56         ide_std_init_ports(&hw, base, ctl);
  57         hw.irq = 14;
  58         hw.chipset = ide_4drives;
  59
  60         hwif = ide_find_port();
  61         if (hwif) {
  62                 ide_init_port_hw(hwif, &hw);
  63                 idx[0] = hwif->index;
  64         }
  65
  66         mate = ide_find_port();
  67         if (mate) {
  68                 ide_init_port_hw(mate, &hw);
  69                 idx[1] = mate->index;
  70         }
  71
  72         ide_device_add(idx, &ide_4drives_port_info);
  73
  74         return 0;
  75 }
  76
  77 module_init(ide_4drives_init);
  78
  79 MODULE_AUTHOR("Bartlomiej Zolnierkiewicz");
  80 MODULE_DESCRIPTION("generic IDE chipset with 4 drives/port support");
  81 MODULE_LICENSE("GPL");