blob: 68633ec78d985302c8d70efdfb50147e2fc8025f [file] [log] [blame]
Harald Krapfenbauer4640c2b2009-08-20 19:20:41 -04001/*
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>
11#include <asm/io.h>
12#include "gpio_cfi_flash.h"
13
14#define GPIO_PIN_1 PH0
15#define GPIO_MASK_1 (1 << 21)
16#define GPIO_MASK (GPIO_MASK_1)
17
18void *gpio_cfi_flash_swizzle(void *vaddr)
19{
20 unsigned long addr = (unsigned long)vaddr;
21
22 if (addr & GPIO_MASK_1)
23 bfin_write_PORTHIO_SET(GPIO_PIN_1);
24 else
25 bfin_write_PORTHIO_CLEAR(GPIO_PIN_1);
26
27#ifdef GPIO_MASK_2
28 if (addr & GPIO_MASK_2)
29 bfin_write_PORTGIO_SET(GPIO_PIN_2);
30 else
31 bfin_write_PORTGIO_CLEAR(GPIO_PIN_2);
32#endif
33
34 SSYNC();
35
36 return (void *)(addr & ~GPIO_MASK);
37}
38
39#define __raw_writeq(value, addr) *(volatile u64 *)addr = value
40#define __raw_readq(addr) *(volatile u64 *)addr
41
42#define MAKE_FLASH(size, sfx) \
43void flash_write##size(u##size value, void *addr) \
44{ \
45 __raw_write##sfx(value, gpio_cfi_flash_swizzle(addr)); \
46} \
47u##size flash_read##size(void *addr) \
48{ \
49 return __raw_read##sfx(gpio_cfi_flash_swizzle(addr)); \
50}
51MAKE_FLASH(8, b) /* flash_write8() flash_read8() */
52MAKE_FLASH(16, w) /* flash_write16() flash_read16() */
53MAKE_FLASH(32, l) /* flash_write32() flash_read32() */
54MAKE_FLASH(64, q) /* flash_write64() flash_read64() */
55
56void gpio_cfi_flash_init(void)
57{
58 bfin_write_PORTHIO_DIR(bfin_read_PORTHIO_DIR() | GPIO_PIN_1);
59 gpio_cfi_flash_swizzle((void *)CONFIG_SYS_FLASH_BASE);
60}