[linux-2.6-block.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_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;
};

/*
 * This structure provide a means for the board setup code
 * to give information to th pata_ixp4xx driver. It is
 * passed as platform_data.
 */
struct ixp4xx_pata_data {
	volatile u32	*cs0_cfg;
	volatile u32	*cs1_cfg;
	unsigned long	cs0_bits;
	unsigned long	cs1_bits;
	void __iomem	*cs0;
	void __iomem	*cs1;
};

struct sys_timer;

/*
 * Frequency of clock used for primary clocksource
 */
extern unsigned long ixp4xx_timer_freq;

/*
 * 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 void ixp4xx_timer_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	40
03bd14c4 AZ	41	#define IXP4XX_EXP_BUS_END(region)\
	42	(IXP4XX_EXP_BUS_BASE(region) + ixp4xx_exp_bus_size - 1)
	43
	44	/* Those macros can be used to adjust timing and configure
	45	* other features for each region.
	46	*/
	47
	48	#define IXP4XX_EXP_BUS_RECOVERY_T(x) (((x) & 0x0f) << 16)
	49	#define IXP4XX_EXP_BUS_HOLD_T(x) (((x) & 0x03) << 20)
	50	#define IXP4XX_EXP_BUS_STROBE_T(x) (((x) & 0x0f) << 22)
	51	#define IXP4XX_EXP_BUS_SETUP_T(x) (((x) & 0x03) << 26)
	52	#define IXP4XX_EXP_BUS_ADDR_T(x) (((x) & 0x03) << 28)
	53	#define IXP4XX_EXP_BUS_SIZE(x) (((x) & 0x0f) << 10)
	54	#define IXP4XX_EXP_BUS_CYCLES(x) (((x) & 0x03) << 14)
	55
	56	#define IXP4XX_EXP_BUS_CS_EN (1L << 31)
	57	#define IXP4XX_EXP_BUS_BYTE_RD16 (1L << 6)
	58	#define IXP4XX_EXP_BUS_HRDY_POL (1L << 5)
	59	#define IXP4XX_EXP_BUS_MUX_EN (1L << 4)
	60	#define IXP4XX_EXP_BUS_SPLT_EN (1L << 3)
	61	#define IXP4XX_EXP_BUS_WR_EN (1L << 1)
	62	#define IXP4XX_EXP_BUS_BYTE_EN (1L << 0)
	63
	64	#define IXP4XX_EXP_BUS_CYCLES_INTEL 0x00
	65	#define IXP4XX_EXP_BUS_CYCLES_MOTOROLA 0x01
	66	#define IXP4XX_EXP_BUS_CYCLES_HPI 0x02
	67
1da177e4 LT	68	#define IXP4XX_FLASH_WRITABLE (0x2)
	69	#define IXP4XX_FLASH_DEFAULT (0xbcd23c40)
	70	#define IXP4XX_FLASH_WRITE (0xbcd23c42)
	71
	72	/*
	73	* Clock Speed Definitions.
	74	*/
	75	#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */
	76	#define IXP4XX_UART_XTAL 14745600
	77
	78	/*
	79	* The IXP4xx chips do not have an I2C unit, so GPIO lines are just
	80	* used to
	81	* Used as platform_data to provide GPIO pin information to the ixp42x
	82	* I2C driver.
	83	*/
	84	struct ixp4xx_i2c_pins {
	85	unsigned long sda_pin;
	86	unsigned long scl_pin;
	87	};
	88
0df0d0a0 AZ	89	/*
	90	* This structure provide a means for the board setup code
	91	* to give information to th pata_ixp4xx driver. It is
	92	* passed as platform_data.
	93	*/
	94	struct ixp4xx_pata_data {
	95	volatile u32 *cs0_cfg;
	96	volatile u32 *cs1_cfg;
	97	unsigned long cs0_bits;
	98	unsigned long cs1_bits;
	99	void __iomem *cs0;
	100	void __iomem *cs1;
	101	};
1da177e4 LT	102
	103	struct sys_timer;
	104
84904d0e KH	105	/*
	106	* Frequency of clock used for primary clocksource
	107	*/
	108	extern unsigned long ixp4xx_timer_freq;
	109
1da177e4 LT	110	/*
	111	* Functions used by platform-level setup code
	112	*/
	113	extern void ixp4xx_map_io(void);
	114	extern void ixp4xx_init_irq(void);
	115	extern void ixp4xx_sys_init(void);
435c5da0	116	extern void ixp4xx_timer_init(void);
1da177e4 LT	117	extern struct sys_timer ixp4xx_timer;
	118	extern void ixp4xx_pci_preinit(void);
	119	struct pci_sys_data;
	120	extern int ixp4xx_setup(int nr, struct pci_sys_data *sys);
	121	extern struct pci_bus ixp4xx_scan_bus(int nr, struct pci_sys_data sys);
	122
	123	/*
	124	* GPIO-functions
	125	*/
	126	/*
	127	* The following converted to the real HW bits the gpio_line_config
	128	*/
	129	/* GPIO pin types */
	130	#define IXP4XX_GPIO_OUT 0x1
	131	#define IXP4XX_GPIO_IN 0x2
	132
1da177e4 LT	133	/* GPIO signal types */
	134	#define IXP4XX_GPIO_LOW 0
	135	#define IXP4XX_GPIO_HIGH 1
	136
	137	/* GPIO Clocks */
	138	#define IXP4XX_GPIO_CLK_0 14
	139	#define IXP4XX_GPIO_CLK_1 15
	140
bdf82b59 DS	141	static inline void gpio_line_config(u8 line, u32 direction)
bdf82b59 DS	142	{
ce12467d	143	if (direction == IXP4XX_GPIO_IN)
bdf82b59 DS	144	*IXP4XX_GPIO_GPOER \|= (1 << line);
	145	else
	146	*IXP4XX_GPIO_GPOER &= ~(1 << line);
	147	}
1da177e4 LT	148
	149	static inline void gpio_line_get(u8 line, int *value)
	150	{
	151	value = (IXP4XX_GPIO_GPINR >> line) & 0x1;
	152	}
	153
	154	static inline void gpio_line_set(u8 line, int value)
	155	{
	156	if (value == IXP4XX_GPIO_HIGH)
	157	*IXP4XX_GPIO_GPOUTR \|= (1 << line);
	158	else if (value == IXP4XX_GPIO_LOW)
	159	*IXP4XX_GPIO_GPOUTR &= ~(1 << line);
	160	}
	161
1da177e4 LT	162	#endif // __ASSEMBLY__
1da177e4 LT	163