diff options
Diffstat (limited to 'src/flash/nand/s3c24xx.c')
| -rw-r--r-- | src/flash/nand/s3c24xx.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/flash/nand/s3c24xx.c b/src/flash/nand/s3c24xx.c new file mode 100644 index 00000000..d305b221 --- /dev/null +++ b/src/flash/nand/s3c24xx.c @@ -0,0 +1,133 @@ +/*************************************************************************** + * Copyright (C) 2007, 2008 by Ben Dooks * + * ben@fluff.org * + * * + * This program is free software; you can redistribute it and/or modify * + * it under the terms of the GNU General Public License as published by * + * the Free Software Foundation; either version 2 of the License, or * + * (at your option) any later version. * + * * + * This program is distributed in the hope that it will be useful, * + * but WITHOUT ANY WARRANTY; without even the implied warranty of * + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * + * GNU General Public License for more details. * + * * + * You should have received a copy of the GNU General Public License * + * along with this program; if not, write to the * + * Free Software Foundation, Inc., * + * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * + ***************************************************************************/ + +/* + * S3C24XX Series OpenOCD NAND Flash controller support. + * + * Many thanks to Simtec Electronics for sponsoring this work. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "s3c24xx.h" + + +S3C24XX_DEVICE_COMMAND() +{ + *info = NULL; + + struct s3c24xx_nand_controller *s3c24xx_info; + s3c24xx_info = malloc(sizeof(struct s3c24xx_nand_controller)); + if (s3c24xx_info == NULL) { + LOG_ERROR("no memory for nand controller\n"); + return -ENOMEM; + } + + nand->controller_priv = s3c24xx_info; + + s3c24xx_info->target = get_target(CMD_ARGV[1]); + if (s3c24xx_info->target == NULL) { + LOG_ERROR("target '%s' not defined", CMD_ARGV[1]); + return ERROR_COMMAND_SYNTAX_ERROR; + } + + *info = s3c24xx_info; + + return ERROR_OK; +} + +int s3c24xx_reset(struct nand_device *nand) +{ + struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv; + struct target *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_write_u32(target, s3c24xx_info->cmd, 0xff); + + return ERROR_OK; +} + +int s3c24xx_command(struct nand_device *nand, uint8_t command) +{ + struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv; + struct target *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_write_u16(target, s3c24xx_info->cmd, command); + return ERROR_OK; +} + + +int s3c24xx_address(struct nand_device *nand, uint8_t address) +{ + struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv; + struct target *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_write_u16(target, s3c24xx_info->addr, address); + return ERROR_OK; +} + +int s3c24xx_write_data(struct nand_device *nand, uint16_t data) +{ + struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv; + struct target *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_write_u8(target, s3c24xx_info->data, data); + return ERROR_OK; +} + +int s3c24xx_read_data(struct nand_device *nand, void *data) +{ + struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv; + struct target *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + LOG_ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_read_u8(target, s3c24xx_info->data, data); + return ERROR_OK; +} + +int s3c24xx_controller_ready(struct nand_device *nand, int timeout) +{ + return 1; +} |