summaryrefslogtreecommitdiffstats
path: root/include/asm-arm/arch-ixp4xx/platform.h
blob: 13aee17b04750b692d5cab4b445d61d84163d740 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
 * 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__

OpenPOWER on IntegriCloud