drivers/ide/ide-default.c

   1 /*
   2  *      ide-default             -       Driver for unbound ide devices
   3  *
   4  *      This provides a clean way to bind a device to default operations
   5  *      by having an actual driver class that rather than special casing
   6  *      "no driver" all over the IDE code
   7  *
   8  *      Copyright (C) 2003, Red Hat <alan@redhat.com>
   9  */
  10
  11 #include <linux/config.h>
  12 #include <linux/module.h>
  13 #include <linux/types.h>
  14 #include <linux/string.h>
  15 #include <linux/kernel.h>
  16 #include <linux/delay.h>
  17 #include <linux/timer.h>
  18 #include <linux/mm.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/major.h>
  21 #include <linux/errno.h>
  22 #include <linux/genhd.h>
  23 #include <linux/slab.h>
  24 #include <linux/cdrom.h>
  25 #include <linux/ide.h>
  26
  27 #include <asm/byteorder.h>
  28 #include <asm/irq.h>
  29 #include <asm/uaccess.h>
  30 #include <asm/io.h>
  31 #include <asm/unaligned.h>
  32 #include <asm/bitops.h>
  33
  34 #define IDEDEFAULT_VERSION      "0.9.newide"
  35 /*
  36  *      Driver initialization.
  37  */
  38
  39 static void idedefault_setup (ide_drive_t *drive)
  40 {
  41 }
  42
  43 static int idedefault_open(struct inode *inode, struct file *filp, ide_drive_t *drive)
  44 {
  45         MOD_INC_USE_COUNT;
  46         if(filp->f_flags & O_NDELAY)
  47                 return 0;
  48         MOD_DEC_USE_COUNT;
  49         drive->usage--;
  50         return -ENXIO;
  51 }
  52
  53 static void idedefault_release(struct inode *inode, struct file *filp, ide_drive_t *drive)
  54 {
  55         MOD_DEC_USE_COUNT;
  56 }
  57
  58 int idedefault_init (void);
  59 int idedefault_attach(ide_drive_t *drive);
  60
  61 /*
  62  *      IDE subdriver functions, registered with ide.c
  63  */
  64
  65 ide_driver_t idedefault_driver = {
  66         name:                   "ide-default",
  67         version:                IDEDEFAULT_VERSION,
  68         media:                  0,
  69         busy:                   0,
  70         supports_dma:           1,
  71         supports_dsc_overlap:   0,
  72         init:                   idedefault_init,
  73         attach:                 idedefault_attach,
  74         open:                   idedefault_open,
  75         release:                idedefault_release
  76 };
  77
  78 static ide_module_t idedefault_module = {
  79         IDE_DRIVER_MODULE,
  80         idedefault_init,
  81         &idedefault_driver,
  82         NULL
  83 };
  84
  85 int idedefault_attach (ide_drive_t *drive)
  86 {
  87         int ret = 0;
  88         MOD_INC_USE_COUNT;
  89         if (ide_register_subdriver(drive,
  90                         &idedefault_driver, IDE_SUBDRIVER_VERSION)) {
  91                 printk(KERN_ERR "ide-default: %s: Failed to register the "
  92                         "driver with ide.c\n", drive->name);
  93                 ret = 1;
  94                 goto bye_game_over;
  95         }
  96         DRIVER(drive)->busy++;
  97         idedefault_setup(drive);
  98         DRIVER(drive)->busy--;
  99
 100 bye_game_over:
 101         MOD_DEC_USE_COUNT;
 102         return ret;
 103 }
 104
 105 int idedefault_init (void)
 106 {
 107         ide_register_module(&idedefault_module);
 108         return 0;
 109 }
 110
 111 MODULE_LICENSE("GPL");