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/*
* 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)
/*
* The expansion bus on the IXP4xx can be configured for either 16 or
* 32MB windows and the CS offset for each region changes based on the
* current configuration. This means that we cannot simply hardcode
* each offset. ixp4xx_sys_init() looks at the expansion bus configuration
* as setup by the bootloader to determine our window size.
*/
extern unsigned long ixp4xx_exp_bus_size;
#define IXP4XX_EXP_BUS_BASE(region)\
(IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
#define IXP4XX_EXP_BUS_END(region)\
(IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)
/* Those macros can be used to adjust timing and configure
* other features for each region.
*/
#define IXP4XX_EXP_BUS_RECOVERY_T(x) (((x) & 0x0f) << 16)
#define IXP4XX_EXP_BUS_HOLD_T(x) (((x) & 0x03) << 20)
#define IXP4XX_EXP_BUS_STROBE_T(x) (((x) & 0x0f) << 22)
#define IXP4XX_EXP_BUS_SETUP_T(x) (((x) & 0x03) << 26)
#define IXP4XX_EXP_BUS_ADDR_T(x) (((x) & 0x03) << 28)
#define IXP4XX_EXP_BUS_SIZE(x) (((x) & 0x0f) << 10)
#define IXP4XX_EXP_BUS_CYCLES(x) (((x) & 0x03) << 14)
#define IXP4XX_EXP_BUS_CS_EN (1L << 31)
#define IXP4XX_EXP_BUS_BYTE_RD16 (1L << 6)
#define IXP4XX_EXP_BUS_HRDY_POL (1L << 5)
#define IXP4XX_EXP_BUS_MUX_EN (1L << 4)
#define IXP4XX_EXP_BUS_SPLT_EN (1L << 3)
#define IXP4XX_EXP_BUS_WR_EN (1L << 1)
#define IXP4XX_EXP_BUS_BYTE_EN (1L << 0)
#define IXP4XX_EXP_BUS_CYCLES_INTEL 0x00
#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA 0x01
#define IXP4XX_EXP_BUS_CYCLES_HPI 0x02
#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
/* 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
static inline void gpio_line_config(u8 line, u32 direction)
{
if (direction == IXP4XX_GPIO_IN)
*IXP4XX_GPIO_GPOER |= (1 << line);
else
*IXP4XX_GPIO_GPOER &= ~(1 << line);
}
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);
}
#endif // __ASSEMBLY__
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