2 * gpio_cfi_flash.c - GPIO-assisted Flash Chip Support
4 * Copyright (c) 2009 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
10 #include <asm/blackfin.h>
12 #include "gpio_cfi_flash.h"
14 #define GPIO_PIN_1 PH0
15 #define GPIO_MASK_1 (1 << 21)
16 #define GPIO_MASK (GPIO_MASK_1)
18 void *gpio_cfi_flash_swizzle(void *vaddr)
20 unsigned long addr = (unsigned long)vaddr;
22 if (addr & GPIO_MASK_1)
23 bfin_write_PORTHIO_SET(GPIO_PIN_1);
25 bfin_write_PORTHIO_CLEAR(GPIO_PIN_1);
28 if (addr & GPIO_MASK_2)
29 bfin_write_PORTGIO_SET(GPIO_PIN_2);
31 bfin_write_PORTGIO_CLEAR(GPIO_PIN_2);
36 return (void *)(addr & ~GPIO_MASK);
39 #define __raw_writeq(value, addr) *(volatile u64 *)addr = value
40 #define __raw_readq(addr) *(volatile u64 *)addr
42 #define MAKE_FLASH(size, sfx) \
43 void flash_write##size(u##size value, void *addr) \
45 __raw_write##sfx(value, gpio_cfi_flash_swizzle(addr)); \
47 u##size flash_read##size(void *addr) \
49 return __raw_read##sfx(gpio_cfi_flash_swizzle(addr)); \
51 MAKE_FLASH(8, b) /* flash_write8() flash_read8() */
52 MAKE_FLASH(16, w) /* flash_write16() flash_read16() */
53 MAKE_FLASH(32, l) /* flash_write32() flash_read32() */
54 MAKE_FLASH(64, q) /* flash_write64() flash_read64() */
56 void gpio_cfi_flash_init(void)
58 bfin_write_PORTHIO_DIR(bfin_read_PORTHIO_DIR() | GPIO_PIN_1);
59 gpio_cfi_flash_swizzle((void *)CONFIG_SYS_FLASH_BASE);