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         if (irq)
  41                 *irq = 0;
  42 }
  43
  44 /*
  45  * This registers the standard ports for this architecture with the IDE
  46  * driver.
  47  */
  48 static __inline__ void
  49 ide_init_default_hwifs(void)
  50 {
  51         hw_regs_t hw;
  52
  53 #if defined( CONFIG_SA1100_EMPEG )
  54         /* First, do the SA1100 setup */
  55
  56         /* PCMCIA IO space */
  57         MECR=0x21062106;
  58
  59         /* Issue 3 is much neater than issue 2 */
  60         GPDR&=~(EMPEG_IDE1IRQ|EMPEG_IDE2IRQ);
  61
  62         /* Interrupts on rising edge: lines are inverted before they get to
  63            the SA */
  64         GRER&=~(EMPEG_IDE1IRQ|EMPEG_IDE2IRQ);
  65         GFER|=(EMPEG_IDE1IRQ|EMPEG_IDE2IRQ);
  66
  67         /* Take hard drives out of reset */
  68         GPSR=(EMPEG_IDERESET);
  69
  70         /* Clear GEDR */
  71         GEDR=0xffffffff;
  72
  73         /* Sonja and her successors have two IDE ports. */
  74         /* MAC 23/4/1999, swap these round so that the left hand
  75            hard disk is hda when viewed from the front. This
  76            doesn't match the silkscreen however. */
  77         ide_init_hwif_ports(&hw,0x10,0x1e,NULL);
  78         hw.irq = EMPEG_IRQ_IDE2;
  79         ide_register_hw(&hw, NULL);
  80         ide_init_hwif_ports(&hw,0x00,0x0e,NULL);
  81         hw.irq = EMPEG_IRQ_IDE1;
  82         ide_register_hw(&hw, NULL);
  83
  84 #elif defined( CONFIG_SA1100_VICTOR )
  85         /* Enable appropriate GPIOs as interrupt lines */
  86         GPDR &= ~GPIO_GPIO7;
  87         GRER |= GPIO_GPIO7;
  88         GFER &= ~GPIO_GPIO7;
  89         GEDR = GPIO_GPIO7;
  90         /* set the pcmcia interface timing */
  91         MECR = 0x00060006;
  92
  93         ide_init_hwif_ports(&hw, 0x1f0, 0x3f6, NULL);
  94         hw.irq = IRQ_GPIO7;
  95         ide_register_hw(&hw, NULL);
  96 #else
  97 #error Missing IDE interface definition in include/asm/arch/ide.h
  98 #endif
  99 }
 100
 101 #endif
 102