2 * include/asm-arm/arch-ixp4xx/platform.h
4 * Constants and functions that are useful to IXP4xx platform-specific code
7 * Copyright (C) 2004 MontaVista Software, Inc.
10 #ifndef __ASM_ARCH_HARDWARE_H__
11 #error "Do not include this directly, instead #include <asm/hardware.h>"
16 #include <asm/types.h>
19 * Expansion bus memory regions
21 #define IXP4XX_EXP_BUS_BASE_PHYS (0x50000000)
23 #define IXP4XX_EXP_BUS_CSX_REGION_SIZE (0x01000000)
25 #define IXP4XX_EXP_BUS_CS0_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x00000000)
26 #define IXP4XX_EXP_BUS_CS1_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x01000000)
27 #define IXP4XX_EXP_BUS_CS2_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x02000000)
28 #define IXP4XX_EXP_BUS_CS3_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x03000000)
29 #define IXP4XX_EXP_BUS_CS4_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x04000000)
30 #define IXP4XX_EXP_BUS_CS5_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x05000000)
31 #define IXP4XX_EXP_BUS_CS6_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x06000000)
32 #define IXP4XX_EXP_BUS_CS7_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x07000000)
34 #define IXP4XX_FLASH_WRITABLE (0x2)
35 #define IXP4XX_FLASH_DEFAULT (0xbcd23c40)
36 #define IXP4XX_FLASH_WRITE (0xbcd23c42)
39 * Clock Speed Definitions.
41 #define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */
42 #define IXP4XX_UART_XTAL 14745600
45 * The IXP4xx chips do not have an I2C unit, so GPIO lines are just
47 * Used as platform_data to provide GPIO pin information to the ixp42x
50 struct ixp4xx_i2c_pins {
51 unsigned long sda_pin;
52 unsigned long scl_pin;
59 * Functions used by platform-level setup code
61 extern void ixp4xx_map_io(void);
62 extern void ixp4xx_init_irq(void);
63 extern struct sys_timer ixp4xx_timer;
64 extern void ixp4xx_pci_preinit(void);
66 extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
67 extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys);
73 * The following converted to the real HW bits the gpio_line_config
76 #define IXP4XX_GPIO_OUT 0x1
77 #define IXP4XX_GPIO_IN 0x2
79 #define IXP4XX_GPIO_INTSTYLE_MASK 0x7C /* Bits [6:2] define interrupt style */
82 * GPIO interrupt types.
84 #define IXP4XX_GPIO_ACTIVE_HIGH 0x4 /* Default */
85 #define IXP4XX_GPIO_ACTIVE_LOW 0x8
86 #define IXP4XX_GPIO_RISING_EDGE 0x10
87 #define IXP4XX_GPIO_FALLING_EDGE 0x20
88 #define IXP4XX_GPIO_TRANSITIONAL 0x40
90 /* GPIO signal types */
91 #define IXP4XX_GPIO_LOW 0
92 #define IXP4XX_GPIO_HIGH 1
95 #define IXP4XX_GPIO_CLK_0 14
96 #define IXP4XX_GPIO_CLK_1 15
98 extern void gpio_line_config(u8 line, u32 style);
100 static inline void gpio_line_get(u8 line, int *value)
102 *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1;
105 static inline void gpio_line_set(u8 line, int value)
107 if (value == IXP4XX_GPIO_HIGH)
108 *IXP4XX_GPIO_GPOUTR |= (1 << line);
109 else if (value == IXP4XX_GPIO_LOW)
110 *IXP4XX_GPIO_GPOUTR &= ~(1 << line);
113 static inline void gpio_line_isr_clear(u8 line)
115 *IXP4XX_GPIO_GPISR = (1 << line);
118 #endif // __ASSEMBLY__