aboutsummaryrefslogtreecommitdiff
path: root/include/asm-arm/arch-at91/hardware.h
blob: ccb7c7285b422f4bd7233070d1c02cea0d465f1e (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
/*
 * include/asm-arm/arch-at91/hardware.h
 *
 *  Copyright (C) 2003 SAN People
 *  Copyright (C) 2003 ATMEL
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 */

#ifndef __ASM_ARCH_HARDWARE_H
#define __ASM_ARCH_HARDWARE_H

#include <asm/sizes.h>

#if defined(CONFIG_ARCH_AT91RM9200)
#include <asm/arch/at91rm9200.h>
#elif defined(CONFIG_ARCH_AT91SAM9260)
#include <asm/arch/at91sam9260.h>
#elif defined(CONFIG_ARCH_AT91SAM9261)
#include <asm/arch/at91sam9261.h>
#else
#error "Unsupported AT91 processor"
#endif


/*
 * Remap the peripherals from address 0xFFFA0000 .. 0xFFFFFFFF
 * to 0xFEFA0000 .. 0xFF000000.  (384Kb)
 */
#define AT91_IO_PHYS_BASE	0xFFFA0000
#define AT91_IO_SIZE		(0xFFFFFFFF - AT91_IO_PHYS_BASE + 1)
#define AT91_IO_VIRT_BASE	(0xFF000000 - AT91_IO_SIZE)

 /* Convert a physical IO address to virtual IO address */
#define AT91_IO_P2V(x)	((x) - AT91_IO_PHYS_BASE + AT91_IO_VIRT_BASE)

/*
 * Virtual to Physical Address mapping for IO devices.
 */
#define AT91_VA_BASE_SYS	AT91_IO_P2V(AT91_BASE_SYS)
#define AT91_VA_BASE_EMAC	AT91_IO_P2V(AT91RM9200_BASE_EMAC)

 /* Internal SRAM is mapped below the IO devices */
#define AT91_SRAM_MAX		SZ_1M
#define AT91_VIRT_BASE		(AT91_IO_VIRT_BASE - AT91_SRAM_MAX)

/* Serial ports */
#define ATMEL_MAX_UART		7		/* 6 USART3's and one DBGU port (SAM9260) */

/* External Memory Map */
#define AT91_CHIPSELECT_0	0x10000000
#define AT91_CHIPSELECT_1	0x20000000
#define AT91_CHIPSELECT_2	0x30000000
#define AT91_CHIPSELECT_3	0x40000000
#define AT91_CHIPSELECT_4	0x50000000
#define AT91_CHIPSELECT_5	0x60000000
#define AT91_CHIPSELECT_6	0x70000000
#define AT91_CHIPSELECT_7	0x80000000

/* SDRAM */
#define AT91_SDRAM_BASE		AT91_CHIPSELECT_1

/* Clocks */
#define AT91_SLOW_CLOCK		32768		/* slow clock */

#ifndef __ASSEMBLY__
#include <asm/io.h>

static inline unsigned int at91_sys_read(unsigned int reg_offset)
{
	void __iomem *addr = (void __iomem *)AT91_VA_BASE_SYS;

	return __raw_readl(addr + reg_offset);
}

static inline void at91_sys_write(unsigned int reg_offset, unsigned long value)
{
	void __iomem *addr = (void __iomem *)AT91_VA_BASE_SYS;

	__raw_writel(value, addr + reg_offset);
}
#endif

#endif