drivers/ide/arm/adi-coyote.c

   1 /*
   2  * drivers/ide/arm/adi-coyote.c
   3  *
   4  * IDE hooks for ADI Engineering Coyote platform
   5  *
   6  * Author: Deepak Saxena <dsaxena@plexity.net>
   7  *
   8  * Copyright 2004 (c) MontaVista, Software, Inc.
   9  *
  10  * This file is licensed under  the terms of the GNU General Public
  11  * License version 2. This program is licensed "as is" without any
  12  * warranty of any kind, whether express or implied.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/blkdev.h>
  18 #include <linux/errno.h>
  19 #include <linux/ide.h>
  20 #include <linux/init.h>
  21
  22 #include <asm/mach-types.h>
  23
  24 static u16 coyote_inw(unsigned long p)
  25 {
  26         return *((volatile u16 *)(COYOTE_IDE_BASE_VIRT + p));
  27 }
  28
  29 static u8 coyote_inb(unsigned long p)
  30 {
  31         return (u8) coyote_inw(p);
  32 }
  33
  34 static void coyote_insw(unsigned long port, void *addr, u32 count)
  35 {
  36         while (count--) {
  37                 *(u16 *)addr = *(volatile u16 *)(COYOTE_IDE_BASE_VIRT + port);
  38                 addr += 2;
  39         }
  40 }
  41 static void coyote_outw(u16 v, unsigned long p)
  42 {
  43         *((volatile u16 *)(COYOTE_IDE_BASE_VIRT + p)) = v;
  44 }
  45
  46 static void coyote_outb(u8 v, unsigned long p)
  47 {
  48         coyote_outw(v, p);
  49 }
  50
  51 static void coyote_outbsync(ide_drive_t *drive, u8 v, unsigned long p)
  52 {
  53         coyote_outw(v, p);
  54 }
  55
  56 static void coyote_outsw(unsigned long port, void *addr, u32 count)
  57 {
  58         while (count--) {
  59                 *(volatile u16 *)(COYOTE_IDE_BASE_VIRT + (port)) = *(u16 *)addr;
  60                 addr += 2;
  61         }
  62 }
  63
  64 static int __init coyote_ide_init(void)
  65 {
  66         int i;
  67         struct hwif_s *hwifp;
  68         hw_regs_t coyote_ide;
  69         ide_ioreg_t reg = (ide_ioreg_t) COYOTE_IDE_DATA_PORT;
  70
  71         if(!machine_is_adi_coyote())
  72                 return -EIO;
  73
  74         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
  75                 coyote_ide.io_ports[i] = reg;
  76                 reg += 2;
  77         }
  78         coyote_ide.irq  = IRQ_COYOTE_IDE;
  79         coyote_ide.io_ports[IDE_CONTROL_OFFSET] = COYOTE_IDE_CTRL_PORT;
  80         coyote_ide.chipset = ide_generic;
  81
  82         printk("Registering IDE HW: %d\n",
  83                 ide_register_hw(&coyote_ide, &hwifp));
  84
  85         /*
  86          * Override the generic functions with our own implementation
  87          */
  88         hwifp->OUTB     = coyote_outb;
  89         hwifp->OUTBSYNC = coyote_outbsync;
  90         hwifp->OUTW     = coyote_outw;
  91         hwifp->OUTSW    = coyote_outsw;
  92         hwifp->INB      = coyote_inb;
  93         hwifp->INW      = coyote_inw;
  94         hwifp->INSW     = coyote_insw;
  95
  96         return 0;
  97 }
  98
  99 MODULE_LICENSE("GPL");
 100 MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");
 101 MODULE_DESCRIPTION("ADI Coyote IDE driver");
 102
 103 module_init(coyote_ide_init);
 104