mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-27 15:12:21 +00:00
68409f844f
Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
81 lines
1.9 KiB
C
81 lines
1.9 KiB
C
/*
|
|
* gpio_cfi_flash.c - GPIO-assisted Flash Chip Support
|
|
*
|
|
* Copyright (c) 2009-2010 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/blackfin.h>
|
|
#include <asm/gpio.h>
|
|
#include <asm/io.h>
|
|
#include "gpio_cfi_flash.h"
|
|
|
|
/* Allow this driver to be shared among boards */
|
|
#ifndef GPIO_PIN_1
|
|
#define GPIO_PIN_1 GPIO_PF4
|
|
#endif
|
|
#define GPIO_MASK_1 (1 << 21)
|
|
#ifndef GPIO_PIN_2
|
|
#define GPIO_MASK_2 (0)
|
|
#else
|
|
#define GPIO_MASK_2 (1 << 22)
|
|
#endif
|
|
#ifndef GPIO_PIN_3
|
|
#define GPIO_MASK_3 (0)
|
|
#else
|
|
#define GPIO_MASK_3 (1 << 23)
|
|
#endif
|
|
#define GPIO_MASK (GPIO_MASK_1 | GPIO_MASK_2 | GPIO_MASK_3)
|
|
|
|
void *gpio_cfi_flash_swizzle(void *vaddr)
|
|
{
|
|
unsigned long addr = (unsigned long)vaddr;
|
|
|
|
gpio_set_value(GPIO_PIN_1, addr & GPIO_MASK_1);
|
|
|
|
#ifdef GPIO_PIN_2
|
|
gpio_set_value(GPIO_PIN_2, addr & GPIO_MASK_2);
|
|
#endif
|
|
|
|
#ifdef GPIO_PIN_3
|
|
gpio_set_value(GPIO_PIN_3, addr & GPIO_MASK_3);
|
|
#endif
|
|
|
|
SSYNC();
|
|
udelay(1);
|
|
|
|
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_read16() */
|
|
MAKE_FLASH(32, l) /* flash_write32() flash_read32() */
|
|
MAKE_FLASH(64, q) /* flash_write64() flash_read64() */
|
|
|
|
void gpio_cfi_flash_init(void)
|
|
{
|
|
gpio_request(GPIO_PIN_1, "gpio_cfi_flash");
|
|
gpio_direction_output(GPIO_PIN_1, 0);
|
|
#ifdef GPIO_PIN_2
|
|
gpio_request(GPIO_PIN_2, "gpio_cfi_flash");
|
|
gpio_direction_output(GPIO_PIN_2, 0);
|
|
#endif
|
|
#ifdef GPIO_PIN_3
|
|
gpio_request(GPIO_PIN_3, "gpio_cfi_flash");
|
|
gpio_direction_output(GPIO_PIN_3, 0);
|
|
#endif
|
|
}
|