drivers/ide/ide_arm.c

   1 /*
   2  * ARM default IDE host driver
   3  *
   4  * Copyright (C) 2004 Bartlomiej Zolnierkiewicz
   5  * Based on code by: Russell King, Ian Molton and Alexander Schulz.
   6  *
   7  * May be copied or modified under the terms of the GNU General Public License.
   8  */
   9
  10 #include <linux/kernel.h>
  11 #include <linux/init.h>
  12 #include <linux/ide.h>
  13
  14 #include <asm/irq.h>
  15
  16 #define DRV_NAME "ide_arm"
  17
  18 #define IDE_ARM_IO      0x1f0
  19 #define IDE_ARM_IRQ     IRQ_HARDDISK
  20
  21 static const struct ide_port_info ide_arm_port_info = {
  22         .host_flags             = IDE_HFLAG_NO_DMA,
  23 };
  24
  25 static int __init ide_arm_init(void)
  26 {
  27         unsigned long base = IDE_ARM_IO, ctl = IDE_ARM_IO + 0x206;
  28         hw_regs_t hw, *hws[] = { &hw, NULL, NULL, NULL };
  29
  30         if (!request_region(base, 8, DRV_NAME)) {
  31                 printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n",
  32                                 DRV_NAME, base, base + 7);
  33                 return -EBUSY;
  34         }
  35
  36         if (!request_region(ctl, 1, DRV_NAME)) {
  37                 printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n",
  38                                 DRV_NAME, ctl);
  39                 release_region(base, 8);
  40                 return -EBUSY;
  41         }
  42
  43         memset(&hw, 0, sizeof(hw));
  44         ide_std_init_ports(&hw, base, ctl);
  45         hw.irq = IDE_ARM_IRQ;
  46         hw.chipset = ide_generic;
  47
  48         return ide_host_add(&ide_arm_port_info, hws, NULL);
  49 }
  50
  51 module_init(ide_arm_init);
  52
  53 MODULE_LICENSE("GPL");