diff options
Diffstat (limited to 'src/flash/s3c2410_nand.c')
-rw-r--r-- | src/flash/s3c2410_nand.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/flash/s3c2410_nand.c b/src/flash/s3c2410_nand.c new file mode 100644 index 0000000..436eb15 --- /dev/null +++ b/src/flash/s3c2410_nand.c @@ -0,0 +1,133 @@ +/* src/flash/s3c2410_nand.c + * + * S3C2410 OpenOCD NAND Flash controller support. + * + * Copyright 2007,2008 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. + * + * Many thanks to Simtec Electronics for sponsoring this work. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include "replacements.h" +#include "log.h" + +#include <stdlib.h> +#include <string.h> + +#include "nand.h" +#include "s3c24xx_nand.h" +#include "target.h" + +int s3c2410_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct nand_device_s *device); +int s3c2410_init(struct nand_device_s *device); +int s3c2410_read_data(struct nand_device_s *device, void *data); +int s3c2410_write_data(struct nand_device_s *device, u16 data); +int s3c2410_nand_ready(struct nand_device_s *device, int timeout); + +nand_flash_controller_t s3c2410_nand_controller = +{ + .name = "s3c2410", + .nand_device_command = s3c2410_nand_device_command, + .register_commands = s3c24xx_register_commands, + .init = s3c2410_init, + .reset = s3c24xx_reset, + .command = s3c24xx_command, + .address = s3c24xx_address, + .write_data = s3c2410_write_data, + .read_data = s3c2410_read_data, + .write_page = s3c24xx_write_page, + .read_page = s3c24xx_read_page, + .controller_ready = s3c24xx_controller_ready, + .nand_ready = s3c2410_nand_ready, +}; + +int s3c2410_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, + char **args, int argc, + struct nand_device_s *device) +{ + s3c24xx_nand_controller_t *info; + + info = s3c24xx_nand_device_command(cmd_ctx, cmd, args, argc, device); + if (info == NULL) { + return ERROR_NAND_DEVICE_INVALID; + } + + /* fill in the address fields for the core device */ + info->cmd = S3C2410_NFCMD; + info->addr = S3C2410_NFADDR; + info->data = S3C2410_NFDATA; + info->nfstat = S3C2410_NFSTAT; + + return ERROR_OK; +} + +int s3c2410_init(struct nand_device_s *device) +{ + s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv; + target_t *target = s3c24xx_info->target; + + target_write_u32(target, S3C2410_NFCONF, + S3C2410_NFCONF_EN | S3C2410_NFCONF_TACLS(3) | + S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3)); + + return ERROR_OK; +} + +int s3c2410_write_data(struct nand_device_s *device, u16 data) +{ + s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv; + target_t *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_write_u32(target, S3C2410_NFDATA, data); + return ERROR_OK; +} + +int s3c2410_read_data(struct nand_device_s *device, void *data) +{ + s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv; + target_t *target = s3c24xx_info->target; + + if (target->state != TARGET_HALTED) { + ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + target_read_u8(target, S3C2410_NFDATA, data); + return ERROR_OK; +} + +int s3c2410_nand_ready(struct nand_device_s *device, int timeout) +{ + s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv; + target_t *target = s3c24xx_info->target; + u8 status; + + if (target->state != TARGET_HALTED) { + ERROR("target must be halted to use S3C24XX NAND flash controller"); + return ERROR_NAND_OPERATION_FAILED; + } + + do { + target_read_u8(target, S3C2410_NFSTAT, &status); + + if (status & S3C2410_NFSTAT_BUSY) + return 1; + + usleep(1000); + } while (timeout-- > 0); + + return 0; +} |