diff options
Diffstat (limited to 'qemu/roms/u-boot/board/freescale/m5329evb/nand.c')
| -rw-r--r-- | qemu/roms/u-boot/board/freescale/m5329evb/nand.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/qemu/roms/u-boot/board/freescale/m5329evb/nand.c b/qemu/roms/u-boot/board/freescale/m5329evb/nand.c new file mode 100644 index 000000000..8d88bc03c --- /dev/null +++ b/qemu/roms/u-boot/board/freescale/m5329evb/nand.c @@ -0,0 +1,73 @@ +/* + * (C) Copyright 2000-2003 + * Wolfgang Denk, DENX Software Engineering, wd@denx.de. + * + * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc. + * TsiChung Liew (Tsi-Chung.Liew@freescale.com) + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <config.h> +#include <common.h> +#include <asm/io.h> +#include <asm/immap.h> + +DECLARE_GLOBAL_DATA_PTR; + +#if defined(CONFIG_CMD_NAND) +#include <nand.h> +#include <linux/mtd/mtd.h> + +#define SET_CLE 0x10 +#define SET_ALE 0x08 + +static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl) +{ + struct nand_chip *this = mtdinfo->priv; + volatile u16 *nCE = (u16 *) CONFIG_SYS_LATCH_ADDR; + + if (ctrl & NAND_CTRL_CHANGE) { + ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; + + IO_ADDR_W &= ~(SET_ALE | SET_CLE); + + if (ctrl & NAND_NCE) + *nCE &= 0xFFFB; + else + *nCE |= 0x0004; + + if (ctrl & NAND_CLE) + IO_ADDR_W |= SET_CLE; + if (ctrl & NAND_ALE) + IO_ADDR_W |= SET_ALE; + + this->IO_ADDR_W = (void *)IO_ADDR_W; + } + + if (cmd != NAND_CMD_NONE) + writeb(cmd, this->IO_ADDR_W); +} + +int board_nand_init(struct nand_chip *nand) +{ + gpio_t *gpio = (gpio_t *) MMAP_GPIO; + + /* + * set up pin configuration - enabled 2nd output buffer's signals + * (nand_ngpio - nCE USB1/2_PWR_EN, LATCH_GPIOs, LCD_VEEEN, etc) + * to use nCE signal + */ + clrbits_8(&gpio->par_timer, GPIO_PAR_TIN3_TIN3); + setbits_8(&gpio->pddr_timer, 0x08); + setbits_8(&gpio->ppd_timer, 0x08); + out_8(&gpio->pclrr_timer, 0); + out_8(&gpio->podr_timer, 0); + + nand->chip_delay = 60; + nand->ecc.mode = NAND_ECC_SOFT; + nand->cmd_ctrl = nand_hwcontrol; + + return 0; +} +#endif |