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- /***************************************************************************
- * 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., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
- ***************************************************************************/
-
- /*
- * S3C2410 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"
-
- NAND_DEVICE_COMMAND_HANDLER(s3c2410_nand_device_command)
- {
- struct s3c24xx_nand_controller *info;
- CALL_S3C24XX_DEVICE_COMMAND(nand, &info);
-
- /* 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;
- }
-
- static int s3c2410_init(struct nand_device *nand)
- {
- struct target *target = nand->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;
- }
-
- static int s3c2410_write_data(struct nand_device *nand, uint16_t data)
- {
- struct target *target = nand->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, S3C2410_NFDATA, data);
- return ERROR_OK;
- }
-
- static int s3c2410_read_data(struct nand_device *nand, void *data)
- {
- struct target *target = nand->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, S3C2410_NFDATA, data);
- return ERROR_OK;
- }
-
- static int s3c2410_nand_ready(struct nand_device *nand, int timeout)
- {
- struct target *target = nand->target;
- uint8_t status;
-
- if (target->state != TARGET_HALTED) {
- LOG_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;
-
- alive_sleep(1);
- } while (timeout-- > 0);
-
- return 0;
- }
-
- struct nand_flash_controller s3c2410_nand_controller = {
- .name = "s3c2410",
- .nand_device_command = &s3c2410_nand_device_command,
- .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,
- .nand_ready = &s3c2410_nand_ready,
- };
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