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Commit | Line | Data |
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4640c2b8 HK |
1 | /* |
2 | * gpio_cfi_flash.c - GPIO-assisted Flash Chip Support | |
3 | * | |
4 | * Copyright (c) 2009 Analog Devices Inc. | |
5 | * | |
6 | * Licensed under the GPL-2 or later. | |
7 | */ | |
8 | ||
9 | #include <common.h> | |
10 | #include <asm/blackfin.h> | |
570ba440 | 11 | #include <asm/gpio.h> |
4640c2b8 HK |
12 | #include <asm/io.h> |
13 | #include "gpio_cfi_flash.h" | |
14 | ||
570ba440 | 15 | #define GPIO_PIN_1 GPIO_PH0 |
4640c2b8 HK |
16 | #define GPIO_MASK_1 (1 << 21) |
17 | #define GPIO_MASK (GPIO_MASK_1) | |
18 | ||
19 | void *gpio_cfi_flash_swizzle(void *vaddr) | |
20 | { | |
21 | unsigned long addr = (unsigned long)vaddr; | |
22 | ||
570ba440 | 23 | gpio_set_value(GPIO_PIN_1, addr & GPIO_MASK_1); |
4640c2b8 HK |
24 | |
25 | #ifdef GPIO_MASK_2 | |
570ba440 | 26 | gpio_set_value(GPIO_PIN_2, addr & GPIO_MASK_2); |
4640c2b8 HK |
27 | #endif |
28 | ||
29 | SSYNC(); | |
30 | ||
31 | return (void *)(addr & ~GPIO_MASK); | |
32 | } | |
33 | ||
34 | #define __raw_writeq(value, addr) *(volatile u64 *)addr = value | |
35 | #define __raw_readq(addr) *(volatile u64 *)addr | |
36 | ||
37 | #define MAKE_FLASH(size, sfx) \ | |
38 | void flash_write##size(u##size value, void *addr) \ | |
39 | { \ | |
40 | __raw_write##sfx(value, gpio_cfi_flash_swizzle(addr)); \ | |
41 | } \ | |
42 | u##size flash_read##size(void *addr) \ | |
43 | { \ | |
44 | return __raw_read##sfx(gpio_cfi_flash_swizzle(addr)); \ | |
45 | } | |
46 | MAKE_FLASH(8, b) /* flash_write8() flash_read8() */ | |
47 | MAKE_FLASH(16, w) /* flash_write16() flash_read16() */ | |
48 | MAKE_FLASH(32, l) /* flash_write32() flash_read32() */ | |
49 | MAKE_FLASH(64, q) /* flash_write64() flash_read64() */ | |
50 | ||
51 | void gpio_cfi_flash_init(void) | |
52 | { | |
570ba440 MF |
53 | gpio_request(GPIO_PIN_1, "gpio_cfi_flash"); |
54 | #ifdef GPIO_MASK_2 | |
55 | gpio_request(GPIO_PIN_2, "gpio_cfi_flash"); | |
56 | #endif | |
4640c2b8 HK |
57 | gpio_cfi_flash_swizzle((void *)CONFIG_SYS_FLASH_BASE); |
58 | } |