From 59e4be945b6469e31eee721e0bcdccf4940d75ac Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Sun, 12 Oct 2008 21:55:45 -0400 Subject: Blackfin: cm-bf527: new board port Signed-off-by: Mike Frysinger --- board/cm-bf527/gpio_cfi_flash.c | 63 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 board/cm-bf527/gpio_cfi_flash.c (limited to 'board/cm-bf527/gpio_cfi_flash.c') diff --git a/board/cm-bf527/gpio_cfi_flash.c b/board/cm-bf527/gpio_cfi_flash.c new file mode 100644 index 0000000000..565d9003ef --- /dev/null +++ b/board/cm-bf527/gpio_cfi_flash.c @@ -0,0 +1,63 @@ +/* + * gpio_cfi_flash.c - GPIO-assisted Flash Chip Support + * + * Copyright (c) 2009 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#include +#include +#include +#include "gpio_cfi_flash.h" + +#define GPIO_PIN_1 PH9 +#define GPIO_MASK_1 (1 << 21) +#define GPIO_PIN_2 PG11 +#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_PORTHIO_SET(GPIO_PIN_1); + else + bfin_write_PORTHIO_CLEAR(GPIO_PIN_1); + +#ifdef GPIO_MASK_2 + if (addr & GPIO_MASK_2) + bfin_write_PORTGIO_SET(GPIO_PIN_2); + else + bfin_write_PORTGIO_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_PORTHIO_DIR(bfin_read_PORTHIO_DIR() | GPIO_PIN_1); + bfin_write_PORTGIO_DIR(bfin_read_PORTGIO_DIR() | GPIO_PIN_2); + gpio_cfi_flash_swizzle((void *)CONFIG_SYS_FLASH_BASE); +} -- cgit v1.2.1