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Diffstat (limited to 'include/asm-arm/arch-ixp4xx/platform.h')
| -rw-r--r-- | include/asm-arm/arch-ixp4xx/platform.h | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/include/asm-arm/arch-ixp4xx/platform.h b/include/asm-arm/arch-ixp4xx/platform.h new file mode 100644 index 00000000000..3a626c03ea2 --- /dev/null +++ b/include/asm-arm/arch-ixp4xx/platform.h @@ -0,0 +1,126 @@ +/* + * include/asm-arm/arch-ixp4xx/platform.h + * + * Constants and functions that are useful to IXP4xx platform-specific code + * and device drivers. + * + * Copyright (C) 2004 MontaVista Software, Inc. + */ + +#ifndef __ASM_ARCH_HARDWARE_H__ +#error "Do not include this directly, instead #include <asm/hardware.h>" +#endif + +#ifndef __ASSEMBLY__ + +#include <asm/types.h> + +#ifndef __ARMEB__ +#define REG_OFFSET 0 +#else +#define REG_OFFSET 3 +#endif + +/* + * Expansion bus memory regions + */ +#define IXP4XX_EXP_BUS_BASE_PHYS (0x50000000) + +#define IXP4XX_EXP_BUS_CSX_REGION_SIZE (0x01000000) + +#define IXP4XX_EXP_BUS_CS0_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x00000000) +#define IXP4XX_EXP_BUS_CS1_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x01000000) +#define IXP4XX_EXP_BUS_CS2_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x02000000) +#define IXP4XX_EXP_BUS_CS3_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x03000000) +#define IXP4XX_EXP_BUS_CS4_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x04000000) +#define IXP4XX_EXP_BUS_CS5_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x05000000) +#define IXP4XX_EXP_BUS_CS6_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x06000000) +#define IXP4XX_EXP_BUS_CS7_BASE_PHYS (IXP4XX_EXP_BUS_BASE_PHYS + 0x07000000) + +#define IXP4XX_FLASH_WRITABLE (0x2) +#define IXP4XX_FLASH_DEFAULT (0xbcd23c40) +#define IXP4XX_FLASH_WRITE (0xbcd23c42) + +/* + * Clock Speed Definitions. + */ +#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */ +#define IXP4XX_UART_XTAL 14745600 + +/* + * The IXP4xx chips do not have an I2C unit, so GPIO lines are just + * used to + * Used as platform_data to provide GPIO pin information to the ixp42x + * I2C driver. + */ +struct ixp4xx_i2c_pins { + unsigned long sda_pin; + unsigned long scl_pin; +}; + + +struct sys_timer; + +/* + * Functions used by platform-level setup code + */ +extern void ixp4xx_map_io(void); +extern void ixp4xx_init_irq(void); +extern void ixp4xx_sys_init(void); +extern struct sys_timer ixp4xx_timer; +extern void ixp4xx_pci_preinit(void); +struct pci_sys_data; +extern int ixp4xx_setup(int nr, struct pci_sys_data *sys); +extern struct pci_bus *ixp4xx_scan_bus(int nr, struct pci_sys_data *sys); + +/* + * GPIO-functions + */ +/* + * The following converted to the real HW bits the gpio_line_config + */ +/* GPIO pin types */ +#define IXP4XX_GPIO_OUT 0x1 +#define IXP4XX_GPIO_IN 0x2 + +#define IXP4XX_GPIO_INTSTYLE_MASK 0x7C /* Bits [6:2] define interrupt style */ + +/* + * GPIO interrupt types. + */ +#define IXP4XX_GPIO_ACTIVE_HIGH 0x4 /* Default */ +#define IXP4XX_GPIO_ACTIVE_LOW 0x8 +#define IXP4XX_GPIO_RISING_EDGE 0x10 +#define IXP4XX_GPIO_FALLING_EDGE 0x20 +#define IXP4XX_GPIO_TRANSITIONAL 0x40 + +/* GPIO signal types */ +#define IXP4XX_GPIO_LOW 0 +#define IXP4XX_GPIO_HIGH 1 + +/* GPIO Clocks */ +#define IXP4XX_GPIO_CLK_0 14 +#define IXP4XX_GPIO_CLK_1 15 + +extern void gpio_line_config(u8 line, u32 style); + +static inline void gpio_line_get(u8 line, int *value) +{ + *value = (*IXP4XX_GPIO_GPINR >> line) & 0x1; +} + +static inline void gpio_line_set(u8 line, int value) +{ + if (value == IXP4XX_GPIO_HIGH) + *IXP4XX_GPIO_GPOUTR |= (1 << line); + else if (value == IXP4XX_GPIO_LOW) + *IXP4XX_GPIO_GPOUTR &= ~(1 << line); +} + +static inline void gpio_line_isr_clear(u8 line) +{ + *IXP4XX_GPIO_GPISR = (1 << line); +} + +#endif // __ASSEMBLY__ + |