drivers/ide/arm/bast-ide.c

   1 /*
   2  * Copyright (c) 2003-2004 Simtec Electronics
   3  *  Ben Dooks <ben@simtec.co.uk>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9 */
  10
  11 #include <linux/module.h>
  12 #include <linux/errno.h>
  13 #include <linux/ide.h>
  14 #include <linux/init.h>
  15
  16 #include <asm/mach-types.h>
  17
  18 #include <asm/io.h>
  19 #include <asm/irq.h>
  20 #include <asm/arch/map.h>
  21 #include <asm/arch/bast-map.h>
  22 #include <asm/arch/bast-irq.h>
  23
  24 #define DRV_NAME "bast-ide"
  25
  26 static int __init bastide_register(unsigned int base, unsigned int aux, int irq)
  27 {
  28         ide_hwif_t *hwif;
  29         hw_regs_t hw;
  30         int i;
  31         u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
  32
  33         memset(&hw, 0, sizeof(hw));
  34
  35         base += BAST_IDE_CS;
  36         aux  += BAST_IDE_CS;
  37
  38         for (i = 0; i <= 7; i++) {
  39                 hw.io_ports_array[i] = (unsigned long)base;
  40                 base += 0x20;
  41         }
  42
  43         hw.io_ports.ctl_addr = aux + (6 * 0x20);
  44         hw.irq = irq;
  45
  46         hwif = ide_find_port();
  47         if (hwif == NULL)
  48                 goto out;
  49
  50         i = hwif->index;
  51
  52         ide_init_port_data(hwif, i);
  53         ide_init_port_hw(hwif, &hw);
  54         hwif->port_ops = NULL;
  55
  56         idx[0] = i;
  57
  58         ide_device_add(idx, NULL);
  59 out:
  60         return 0;
  61 }
  62
  63 static int __init bastide_init(void)
  64 {
  65         unsigned long base = BAST_VA_IDEPRI + BAST_IDE_CS;
  66
  67         /* we can treat the VR1000 and the BAST the same */
  68
  69         if (!(machine_is_bast() || machine_is_vr1000()))
  70                 return 0;
  71
  72         printk("BAST: IDE driver, (c) 2003-2004 Simtec Electronics\n");
  73
  74         if (!request_mem_region(base, 0x400000, DRV_NAME)) {
  75                 printk(KERN_ERR "%s: resources busy\n", DRV_NAME);
  76                 return -EBUSY;
  77         }
  78
  79         bastide_register(BAST_VA_IDEPRI, BAST_VA_IDEPRIAUX, IRQ_IDE0);
  80         bastide_register(BAST_VA_IDESEC, BAST_VA_IDESECAUX, IRQ_IDE1);
  81
  82         return 0;
  83 }
  84
  85 module_init(bastide_init);
  86
  87 MODULE_AUTHOR("Ben Dooks <ben@simtec.co.uk>");
  88 MODULE_LICENSE("GPL");
  89 MODULE_DESCRIPTION("Simtec BAST / Thorcom VR1000 IDE driver");