[deliverable/linux.git] / include / asm-arm / arch-ixp4xx / platform.h

/*
 * 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_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__
Commit	Line	Data
1da177e4 LT	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
54e269ea DS	29	/*
	30	* The expansion bus on the IXP4xx can be configured for either 16 or
	31	* 32MB windows and the CS offset for each region changes based on the
	32	* current configuration. This means that we cannot simply hardcode
	33	* each offset. ixp4xx_sys_init() looks at the expansion bus configuration
	34	* as setup by the bootloader to determine our window size.
	35	*/
	36	extern unsigned long ixp4xx_exp_bus_size;
1da177e4	37
54e269ea DS	38	#define IXP4XX_EXP_BUS_BASE(region)\
54e269ea DS	39	(IXP4XX_EXP_BUS_BASE_PHYS + ((region) * ixp4xx_exp_bus_size))
1da177e4 LT	40
	41	#define IXP4XX_FLASH_WRITABLE (0x2)
	42	#define IXP4XX_FLASH_DEFAULT (0xbcd23c40)
	43	#define IXP4XX_FLASH_WRITE (0xbcd23c42)
	44
	45	/*
	46	* Clock Speed Definitions.
	47	*/
	48	#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */
	49	#define IXP4XX_UART_XTAL 14745600
	50
	51	/*
	52	* The IXP4xx chips do not have an I2C unit, so GPIO lines are just
	53	* used to
	54	* Used as platform_data to provide GPIO pin information to the ixp42x
	55	* I2C driver.
	56	*/
	57	struct ixp4xx_i2c_pins {
	58	unsigned long sda_pin;
	59	unsigned long scl_pin;
	60	};
	61
	62
	63	struct sys_timer;
	64
	65	/*
	66	* Functions used by platform-level setup code
	67	*/
	68	extern void ixp4xx_map_io(void);
	69	extern void ixp4xx_init_irq(void);
	70	extern void ixp4xx_sys_init(void);
	71	extern struct sys_timer ixp4xx_timer;
	72	extern void ixp4xx_pci_preinit(void);
	73	struct pci_sys_data;
	74	extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
	75	extern struct pci_bus ixp4xx_scan_bus(int nr, struct pci_sys_data sys);
	76
	77	/*
	78	* GPIO-functions
	79	*/
	80	/*
	81	* The following converted to the real HW bits the gpio_line_config
	82	*/
	83	/* GPIO pin types */
	84	#define IXP4XX_GPIO_OUT 0x1
	85	#define IXP4XX_GPIO_IN 0x2
	86
1da177e4 LT	87	/* GPIO signal types */
	88	#define IXP4XX_GPIO_LOW 0
	89	#define IXP4XX_GPIO_HIGH 1
	90
	91	/* GPIO Clocks */
	92	#define IXP4XX_GPIO_CLK_0 14
	93	#define IXP4XX_GPIO_CLK_1 15
	94
bdf82b59 DS	95	static inline void gpio_line_config(u8 line, u32 direction)
bdf82b59 DS	96	{
ce12467d	97	if (direction == IXP4XX_GPIO_IN)
bdf82b59 DS	98	*IXP4XX_GPIO_GPOER \|= (1 << line);
	99	else
	100	*IXP4XX_GPIO_GPOER &= ~(1 << line);
	101	}
1da177e4 LT	102
	103	static inline void gpio_line_get(u8 line, int *value)
	104	{
	105	value = (IXP4XX_GPIO_GPINR >> line) & 0x1;
	106	}
	107
	108	static inline void gpio_line_set(u8 line, int value)
	109	{
	110	if (value == IXP4XX_GPIO_HIGH)
	111	*IXP4XX_GPIO_GPOUTR \|= (1 << line);
	112	else if (value == IXP4XX_GPIO_LOW)
	113	*IXP4XX_GPIO_GPOUTR &= ~(1 << line);
	114	}
	115
1da177e4 LT	116	#endif // __ASSEMBLY__
1da177e4 LT	117