projects / people / ms / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 73ccb341 GJ |
1 | /* |
| 2 | * (C) Copyright 2008 | |
| 3 | * Gary Jennejohn, DENX Software Engineering GmbH, garyj@denx.de | |
| 4 | * | |
| 1a459660 | 5 | * SPDX-License-Identifier: GPL-2.0+ |
| 73ccb341 GJ |
6 | */ |
| 7 | ||
| 8 | #include <common.h> | |
| 9 | #include <config.h> | |
| 10 | #if defined(CONFIG_CMD_NAND) | |
| 09887762 | 11 | #include <asm/ppc4xx-gpio.h> |
| ba22d10f | 12 | #include <asm/io.h> |
| 73ccb341 GJ |
13 | #include <nand.h> |
| 14 | ||
| 15 | /* | |
| 16 | * hardware specific access to control-lines | |
| 17 | */ | |
| ba22d10f SW |
18 | static void quad100hd_hwcontrol(struct mtd_info *mtd, |
| 19 | int cmd, unsigned int ctrl) | |
| 73ccb341 | 20 | { |
| ba22d10f | 21 | struct nand_chip *this = mtd->priv; |
| 73ccb341 | 22 | |
| ba22d10f | 23 | if (ctrl & NAND_CTRL_CHANGE) { |
| 6d0f6bcf JCPV |
24 | gpio_write_bit(CONFIG_SYS_NAND_CLE, !!(ctrl & NAND_CLE)); |
| 25 | gpio_write_bit(CONFIG_SYS_NAND_ALE, !!(ctrl & NAND_ALE)); | |
| 26 | gpio_write_bit(CONFIG_SYS_NAND_CE, !(ctrl & NAND_NCE)); | |
| 73ccb341 | 27 | } |
| ba22d10f SW |
28 | |
| 29 | if (cmd != NAND_CMD_NONE) | |
| 30 | writeb(cmd, this->IO_ADDR_W); | |
| 73ccb341 GJ |
31 | } |
| 32 | ||
| 33 | static int quad100hd_nand_ready(struct mtd_info *mtd) | |
| 34 | { | |
| 6d0f6bcf | 35 | return gpio_read_in_bit(CONFIG_SYS_NAND_RDY); |
| 73ccb341 GJ |
36 | } |
| 37 | ||
| 38 | /* | |
| 39 | * Main initialization routine | |
| 40 | */ | |
| 41 | int board_nand_init(struct nand_chip *nand) | |
| 42 | { | |
| 43 | /* Set address of hardware control function */ | |
| ba22d10f | 44 | nand->cmd_ctrl = quad100hd_hwcontrol; |
| 73ccb341 | 45 | nand->dev_ready = quad100hd_nand_ready; |
| ba22d10f | 46 | nand->ecc.mode = NAND_ECC_SOFT; |
| 73ccb341 GJ |
47 | /* 15 us command delay time */ |
| 48 | nand->chip_delay = 20; | |
| 49 | ||
| 50 | /* Return happy */ | |
| 51 | return 0; | |
| 52 | } | |
| 53 | #endif /* CONFIG_CMD_NAND */ |