| /* |
| * (C) Copyright 2008 |
| * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de |
| * |
| * SPDX-License-Identifier: GPL-2.0+ |
| */ |
| |
| #include <common.h> |
| #include <config.h> |
| #if defined(CONFIG_CMD_NAND) |
| #include <asm/ppc4xx-gpio.h> |
| #include <asm/io.h> |
| #include <nand.h> |
| |
| /* |
| * hardware specific access to control-lines |
| */ |
| static void quad100hd_hwcontrol(struct mtd_info *mtd, |
| int cmd, unsigned int ctrl) |
| { |
| struct nand_chip *this = mtd->priv; |
| |
| if (ctrl & NAND_CTRL_CHANGE) { |
| gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE)); |
| gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE)); |
| gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE)); |
| } |
| |
| if (cmd != NAND_CMD_NONE) |
| writeb(cmd, this->IO_ADDR_W); |
| } |
| |
| static int quad100hd_nand_ready(struct mtd_info *mtd) |
| { |
| return gpio_read_in_bit(CONFIG_SYS_NAND_RDY); |
| } |
| |
| /* |
| * Main initialization routine |
| */ |
| int board_nand_init(struct nand_chip *nand) |
| { |
| /* Set address of hardware control function */ |
| nand->cmd_ctrl = quad100hd_hwcontrol; |
| nand->dev_ready = quad100hd_nand_ready; |
| nand->ecc.mode = NAND_ECC_SOFT; |
| /* 15 us command delay time */ |
| nand->chip_delay = 20; |
| |
| /* Return happy */ |
| return 0; |
| } |
| #endif /* CONFIG_CMD_NAND */ |
