include/asm-arm/arch-ixp4xx/platform.h

   1 /*
   2  * include/asm-arm/arch-ixp4xx/platform.h
   3  *
   4  * Constants and functions that are useful to IXP4xx platform-specific code
   5  * and device drivers.
   6  *
   7  * Copyright (C) 2004 MontaVista Software, Inc.
   8  */
   9
  10 #ifndef __ASM_ARCH_HARDWARE_H__
  11 #error "Do not include this directly, instead #include <asm/hardware.h>"
  12 #endif
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #include <asm/types.h>
  17
  18 #ifndef __ARMEB__
  19 #define REG_OFFSET      0
  20 #else
  21 #define REG_OFFSET      3
  22 #endif
  23
  24 /*
  25  * Expansion bus memory regions
  26  */
  27 #define IXP4XX_EXP_BUS_BASE_PHYS        (0x50000000)
  28
  29 #define IXP4XX_EXP_BUS_CSX_REGION_SIZE  (0x01000000)
  30
  31 #define IXP4XX_EXP_BUS_CS0_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x00000000)
  32 #define IXP4XX_EXP_BUS_CS1_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x01000000)
  33 #define IXP4XX_EXP_BUS_CS2_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x02000000)
  34 #define IXP4XX_EXP_BUS_CS3_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x03000000)
  35 #define IXP4XX_EXP_BUS_CS4_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x04000000)
  36 #define IXP4XX_EXP_BUS_CS5_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x05000000)
  37 #define IXP4XX_EXP_BUS_CS6_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x06000000)
  38 #define IXP4XX_EXP_BUS_CS7_BASE_PHYS    (IXP4XX_EXP_BUS_BASE_PHYS + 0x07000000)
  39
  40 #define IXP4XX_FLASH_WRITABLE   (0x2)
  41 #define IXP4XX_FLASH_DEFAULT    (0xbcd23c40)
  42 #define IXP4XX_FLASH_WRITE      (0xbcd23c42)
  43
  44 /*
  45  * Clock Speed Definitions.
  46  */
  47 #define IXP4XX_PERIPHERAL_BUS_CLOCK     (66) /* 66Mhzi APB BUS   */
  48 #define IXP4XX_UART_XTAL                14745600
  49
  50 /*
  51  * The IXP4xx chips do not have an I2C unit, so GPIO lines are just
  52  * used to
  53  * Used as platform_data to provide GPIO pin information to the ixp42x
  54  * I2C driver.
  55  */
  56 struct ixp4xx_i2c_pins {
  57         unsigned long sda_pin;
  58         unsigned long scl_pin;
  59 };
  60
  61
  62 struct sys_timer;
  63
  64 /*
  65  * Functions used by platform-level setup code
  66  */
  67 extern void ixp4xx_map_io(void);
  68 extern void ixp4xx_init_irq(void);
  69 extern void ixp4xx_sys_init(void);
  70 extern struct sys_timer ixp4xx_timer;
  71 extern void ixp4xx_pci_preinit(void);
  72 struct pci_sys_data;
  73 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
  74 extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
  75
  76 /*
  77  * GPIO-functions
  78  */
  79 /*
  80  * The following converted to the real HW bits the gpio_line_config
  81  */
  82 /* GPIO pin types */
  83 #define IXP4XX_GPIO_OUT                 0x1
  84 #define IXP4XX_GPIO_IN                  0x2
  85
  86 #define IXP4XX_GPIO_INTSTYLE_MASK       0x7C  /* Bits [6:2] define interrupt style */
  87
  88 /*
  89  * GPIO interrupt types.
  90  */
  91 #define IXP4XX_GPIO_ACTIVE_HIGH         0x4 /* Default */
  92 #define IXP4XX_GPIO_ACTIVE_LOW          0x8
  93 #define IXP4XX_GPIO_RISING_EDGE         0x10
  94 #define IXP4XX_GPIO_FALLING_EDGE        0x20
  95 #define IXP4XX_GPIO_TRANSITIONAL        0x40
  96
  97 /* GPIO signal types */
  98 #define IXP4XX_GPIO_LOW                 0
  99 #define IXP4XX_GPIO_HIGH                1
 100
 101 /* GPIO Clocks */
 102 #define IXP4XX_GPIO_CLK_0               14
 103 #define IXP4XX_GPIO_CLK_1               15
 104
 105 extern void gpio_line_config(u8 line, u32 style);
 106
 107 static inline void gpio_line_get(u8 line, int *value)
 108 {
 109         *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
 110 }
 111
 112 static inline void gpio_line_set(u8 line, int value)
 113 {
 114         if (value == IXP4XX_GPIO_HIGH)
 115             *IXP4XX_GPIO_GPOUTR |= (1 << line);
 116         else if (value == IXP4XX_GPIO_LOW)
 117             *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
 118 }
 119
 120 static inline void gpio_line_isr_clear(u8 line)
 121 {
 122         *IXP4XX_GPIO_GPISR = (1 << line);
 123 }
 124
 125 #endif // __ASSEMBLY__
 126