mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-20 00:48:52 +09:00
![Mike Frysinger](/assets/img/avatar_default.png)
Make it easy to use GPIOs for the DEV_READY pin by using the common GPIO framework. Also make the NAND_PLAT_INIT() define optional. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Tested-by: Thomas Chou <thomas@wytron.com.tw>
65 lines
1.3 KiB
C
65 lines
1.3 KiB
C
/*
|
|
* Genericish driver for memory mapped NAND devices
|
|
*
|
|
* Copyright (c) 2006-2009 Analog Devices Inc.
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
|
|
/* Your board must implement the following macros:
|
|
* NAND_PLAT_WRITE_CMD(chip, cmd)
|
|
* NAND_PLAT_WRITE_ADR(chip, cmd)
|
|
* NAND_PLAT_INIT()
|
|
*
|
|
* It may also implement the following:
|
|
* NAND_PLAT_DEV_READY(chip)
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#ifdef NAND_PLAT_GPIO_DEV_READY
|
|
# include <asm/gpio.h>
|
|
# define NAND_PLAT_DEV_READY(chip) gpio_get_value(NAND_PLAT_GPIO_DEV_READY)
|
|
#endif
|
|
|
|
#include <nand.h>
|
|
|
|
static void plat_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
|
|
{
|
|
struct nand_chip *this = mtd->priv;
|
|
|
|
if (cmd == NAND_CMD_NONE)
|
|
return;
|
|
|
|
if (ctrl & NAND_CLE)
|
|
NAND_PLAT_WRITE_CMD(this, cmd);
|
|
else
|
|
NAND_PLAT_WRITE_ADR(this, cmd);
|
|
}
|
|
|
|
#ifdef NAND_PLAT_DEV_READY
|
|
static int plat_dev_ready(struct mtd_info *mtd)
|
|
{
|
|
return NAND_PLAT_DEV_READY((struct nand_chip *)mtd->priv);
|
|
}
|
|
#else
|
|
# define plat_dev_ready NULL
|
|
#endif
|
|
|
|
int board_nand_init(struct nand_chip *nand)
|
|
{
|
|
#ifdef NAND_PLAT_GPIO_DEV_READY
|
|
gpio_request(NAND_PLAT_GPIO_DEV_READY, "nand-plat");
|
|
gpio_direction_input(NAND_PLAT_GPIO_DEV_READY);
|
|
#endif
|
|
|
|
#ifdef NAND_PLAT_INIT
|
|
NAND_PLAT_INIT();
|
|
#endif
|
|
|
|
nand->cmd_ctrl = plat_cmd_ctrl;
|
|
nand->dev_ready = plat_dev_ready;
|
|
nand->ecc.mode = NAND_ECC_SOFT;
|
|
|
|
return 0;
|
|
}
|