include/asm-arm/arch-sa1100/ide.h

   1 /*
   2  * linux/include/asm-arm/arch-sa1100/ide.h
   3  *
   4  * Copyright (c) 1998 Hugo Fiennes & Nicolas Pitre
   5  *
   6  */
   7
   8 #include <linux/config.h>
   9
  10 #ifdef CONFIG_BLK_DEV_IDE
  11
  12 #include <asm/irq.h>
  13 #include <asm/arch/hardware.h>
  14
  15 /*
  16  * Set up a hw structure for a specified data port, control port and IRQ.
  17  * This should follow whatever the default interface uses.
  18  */
  19 static __inline__ void
  20 ide_init_hwif_ports(hw_regs_t *hw, int data_port, int ctrl_port, int irq)
  21 {
  22         ide_ioreg_t reg;
  23         int i;
  24
  25         memset(hw, 0, sizeof(*hw));
  26
  27 #ifdef CONFIG_SA1100_EMPEG
  28 /* The Empeg board has the first two address lines unused */
  29 #define IO_SHIFT 2
  30 #else
  31 #define IO_SHIFT 0
  32 #endif
  33
  34         reg = (ide_ioreg_t) (data_port << IO_SHIFT);
  35         for (i = IDE_DATA_OFFSET; i <= IDE_STATUS_OFFSET; i++) {
  36                 hw->io_ports[i] = reg;
  37                 reg += (1 << IO_SHIFT);
  38         }
  39         hw->io_ports[IDE_CONTROL_OFFSET] = (ide_ioreg_t) (ctrl_port << IO_SHIFT);
  40         hw->irq = irq;
  41 }
  42
  43 /*
  44  * This registers the standard ports for this architecture with the IDE
  45  * driver.
  46  */
  47 static __inline__ void
  48 ide_init_default_hwifs(void)
  49 {
  50         hw_regs_t hw;
  51
  52 #if defined( CONFIG_SA1100_EMPEG )
  53         /* First, do the SA1100 setup */
  54
  55         /* PCMCIA IO space */
  56         MECR=0x21062106;
  57
  58         /* Issue 3 is much neater than issue 2 */
  59         GPDR&=~(EMPEG_IDE1IRQ|EMPEG_IDE2IRQ);
  60
  61         /* Interrupts on rising edge: lines are inverted before they get to
  62            the SA */
  63         GRER&=~(EMPEG_IDE1IRQ|EMPEG_IDE2IRQ);
  64         GFER|=(EMPEG_IDE1IRQ|EMPEG_IDE2IRQ);
  65
  66         /* Take hard drives out of reset */
  67         GPSR=(EMPEG_IDERESET);
  68
  69         /* Clear GEDR */
  70         GEDR=0xffffffff;
  71
  72         /* Sonja and her successors have two IDE ports. */
  73         /* MAC 23/4/1999, swap these round so that the left hand
  74            hard disk is hda when viewed from the front. This
  75            doesn't match the silkscreen however. */
  76         ide_init_hwif_ports(&hw,0x10,0x1e,EMPEG_IRQ_IDE2);
  77         ide_register_hw(&hw, NULL);
  78         ide_init_hwif_ports(&hw,0x00,0x0e,EMPEG_IRQ_IDE1);
  79         ide_register_hw(&hw, NULL);
  80
  81 #elif defined( CONFIG_SA1100_VICTOR )
  82         /* Enable appropriate GPIOs as interrupt lines */
  83         GPDR &= ~GPIO_GPIO7;
  84         GRER |= GPIO_GPIO7;
  85         GFER &= ~GPIO_GPIO7;
  86         GEDR = GPIO_GPIO7;
  87         /* set the pcmcia interface timing */
  88         MECR = 0x00060006;
  89
  90         ide_init_hwif_ports(&hw, 0x1f0, 0x3f6, IRQ_GPIO7);
  91         ide_register_hw(&hw, NULL);
  92 #else
  93 #error Missing IDE interface definition in include/asm/arch/ide.h
  94 #endif
  95 }
  96
  97 #endif
  98