diff options
author | Mike Frysinger <vapier@gentoo.org> | 2008-10-12 21:49:28 -0400 |
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committer | Mike Frysinger <vapier@gentoo.org> | 2009-06-14 20:01:06 -0400 |
commit | 9417d9a21384279308abe5b4dd8dfd418742484c (patch) | |
tree | 5f059af2f2bca09a384888f539e1323d3a0ab041 /board/tcm-bf537/gpio_cfi_flash.c | |
parent | e548321af00e869af7194896576beb9b68457ff7 (diff) |
Blackfin: tcm-bf537: new board port
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Diffstat (limited to 'board/tcm-bf537/gpio_cfi_flash.c')
-rw-r--r-- | board/tcm-bf537/gpio_cfi_flash.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/board/tcm-bf537/gpio_cfi_flash.c b/board/tcm-bf537/gpio_cfi_flash.c new file mode 100644 index 0000000000..7137d12558 --- /dev/null +++ b/board/tcm-bf537/gpio_cfi_flash.c @@ -0,0 +1,62 @@ +/* + * gpio_cfi_flash.c - GPIO-assisted Flash Chip Support + * + * Copyright (c) 2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include <common.h> +#include <asm/blackfin.h> +#include <asm/io.h> +#include "gpio_cfi_flash.h" + +#define GPIO_PIN_1 PF4 +#define GPIO_MASK_1 (1 << 21) +#define GPIO_PIN_2 PF5 +#define GPIO_MASK_2 (1 << 22) +#define GPIO_MASK (GPIO_MASK_1 | GPIO_MASK_2) + +void *gpio_cfi_flash_swizzle(void *vaddr) +{ + unsigned long addr = (unsigned long)vaddr; + + if (addr & GPIO_MASK_1) + bfin_write_PORTFIO_SET(GPIO_PIN_1); + else + bfin_write_PORTFIO_CLEAR(GPIO_PIN_1); + +#ifdef GPIO_MASK_2 + if (addr & GPIO_MASK_2) + bfin_write_PORTFIO_SET(GPIO_PIN_2); + else + bfin_write_PORTFIO_CLEAR(GPIO_PIN_2); +#endif + + SSYNC(); + + return (void *)(addr & ~GPIO_MASK); +} + +#define __raw_writeq(value, addr) *(volatile u64 *)addr = value +#define __raw_readq(addr) *(volatile u64 *)addr + +#define MAKE_FLASH(size, sfx) \ +void flash_write##size(u##size value, void *addr) \ +{ \ + __raw_write##sfx(value, gpio_cfi_flash_swizzle(addr)); \ +} \ +u##size flash_read##size(void *addr) \ +{ \ + return __raw_read##sfx(gpio_cfi_flash_swizzle(addr)); \ +} +MAKE_FLASH(8, b) /* flash_write8() flash_read8() */ +MAKE_FLASH(16, w) /* flash_write16() flash_write16() */ +MAKE_FLASH(32, l) /* flash_write32() flash_write32() */ +MAKE_FLASH(64, q) /* flash_write64() flash_write64() */ + +void gpio_cfi_flash_init(void) +{ + bfin_write_PORTFIO_DIR(bfin_read_PORTFIO_DIR() | GPIO_PIN_1 | GPIO_PIN_2); + gpio_cfi_flash_swizzle((void *)CONFIG_SYS_FLASH_BASE); +} |