]>
Commit | Line | Data |
---|---|---|
9417d9a2 MF |
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> |
9417d9a2 MF |
12 | #include <asm/io.h> |
13 | #include "gpio_cfi_flash.h" | |
14 | ||
570ba440 | 15 | #define GPIO_PIN_1 GPIO_PF4 |
9417d9a2 | 16 | #define GPIO_MASK_1 (1 << 21) |
570ba440 | 17 | #define GPIO_PIN_2 GPIO_PF5 |
9417d9a2 MF |
18 | #define GPIO_MASK_2 (1 << 22) |
19 | #define GPIO_MASK (GPIO_MASK_1 | GPIO_MASK_2) | |
20 | ||
21 | void *gpio_cfi_flash_swizzle(void *vaddr) | |
22 | { | |
23 | unsigned long addr = (unsigned long)vaddr; | |
24 | ||
570ba440 | 25 | gpio_set_value(GPIO_PIN_1, addr & GPIO_MASK_1); |
9417d9a2 MF |
26 | |
27 | #ifdef GPIO_MASK_2 | |
570ba440 | 28 | gpio_set_value(GPIO_PIN_2, addr & GPIO_MASK_2); |
9417d9a2 MF |
29 | #endif |
30 | ||
31 | SSYNC(); | |
32 | ||
33 | return (void *)(addr & ~GPIO_MASK); | |
34 | } | |
35 | ||
36 | #define __raw_writeq(value, addr) *(volatile u64 *)addr = value | |
37 | #define __raw_readq(addr) *(volatile u64 *)addr | |
38 | ||
39 | #define MAKE_FLASH(size, sfx) \ | |
40 | void flash_write##size(u##size value, void *addr) \ | |
41 | { \ | |
42 | __raw_write##sfx(value, gpio_cfi_flash_swizzle(addr)); \ | |
43 | } \ | |
44 | u##size flash_read##size(void *addr) \ | |
45 | { \ | |
46 | return __raw_read##sfx(gpio_cfi_flash_swizzle(addr)); \ | |
47 | } | |
48 | MAKE_FLASH(8, b) /* flash_write8() flash_read8() */ | |
e637385e MF |
49 | MAKE_FLASH(16, w) /* flash_write16() flash_read16() */ |
50 | MAKE_FLASH(32, l) /* flash_write32() flash_read32() */ | |
51 | MAKE_FLASH(64, q) /* flash_write64() flash_read64() */ | |
9417d9a2 MF |
52 | |
53 | void gpio_cfi_flash_init(void) | |
54 | { | |
570ba440 MF |
55 | gpio_request(GPIO_PIN_1, "gpio_cfi_flash"); |
56 | #ifdef GPIO_MASK_2 | |
57 | gpio_request(GPIO_PIN_2, "gpio_cfi_flash"); | |
58 | #endif | |
9417d9a2 MF |
59 | gpio_cfi_flash_swizzle((void *)CONFIG_SYS_FLASH_BASE); |
60 | } |