src/flash/nand/s3c24xx.c

   1 /***************************************************************************
   2  *   Copyright (C) 2007, 2008 by Ben Dooks                                 *
   3  *   ben@fluff.org                                                         *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) any later version.                                   *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  17  ***************************************************************************/
  18
  19 /*
  20  * S3C24XX Series OpenOCD NAND Flash controller support.
  21  *
  22  * Many thanks to Simtec Electronics for sponsoring this work.
  23  */
  24
  25 #ifdef HAVE_CONFIG_H
  26 #include "config.h"
  27 #endif
  28
  29 #include "s3c24xx.h"
  30
  31 S3C24XX_DEVICE_COMMAND()
  32 {
  33         *info = NULL;
  34
  35         struct s3c24xx_nand_controller *s3c24xx_info;
  36         s3c24xx_info = malloc(sizeof(struct s3c24xx_nand_controller));
  37         if (s3c24xx_info == NULL) {
  38                 LOG_ERROR("no memory for nand controller");
  39                 return -ENOMEM;
  40         }
  41
  42         nand->controller_priv = s3c24xx_info;
  43         *info = s3c24xx_info;
  44
  45         return ERROR_OK;
  46 }
  47
  48 int s3c24xx_reset(struct nand_device *nand)
  49 {
  50         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  51         struct target *target = nand->target;
  52
  53         if (target->state != TARGET_HALTED) {
  54                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  55                 return ERROR_NAND_OPERATION_FAILED;
  56         }
  57
  58         target_write_u32(target, s3c24xx_info->cmd, 0xff);
  59
  60         return ERROR_OK;
  61 }
  62
  63 int s3c24xx_command(struct nand_device *nand, uint8_t command)
  64 {
  65         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  66         struct target *target = nand->target;
  67
  68         if (target->state != TARGET_HALTED) {
  69                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  70                 return ERROR_NAND_OPERATION_FAILED;
  71         }
  72
  73         target_write_u16(target, s3c24xx_info->cmd, command);
  74         return ERROR_OK;
  75 }
  76
  77 int s3c24xx_address(struct nand_device *nand, uint8_t address)
  78 {
  79         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  80         struct target *target = nand->target;
  81
  82         if (target->state != TARGET_HALTED) {
  83                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  84                 return ERROR_NAND_OPERATION_FAILED;
  85         }
  86
  87         target_write_u16(target, s3c24xx_info->addr, address);
  88         return ERROR_OK;
  89 }
  90
  91 int s3c24xx_write_data(struct nand_device *nand, uint16_t data)
  92 {
  93         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  94         struct target *target = nand->target;
  95
  96         if (target->state != TARGET_HALTED) {
  97                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  98                 return ERROR_NAND_OPERATION_FAILED;
  99         }
 100
 101         target_write_u8(target, s3c24xx_info->data, data);
 102         return ERROR_OK;
 103 }
 104
 105 int s3c24xx_read_data(struct nand_device *nand, void *data)
 106 {
 107         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
 108         struct target *target = nand->target;
 109
 110         if (target->state != TARGET_HALTED) {
 111                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
 112                 return ERROR_NAND_OPERATION_FAILED;
 113         }
 114
 115         target_read_u8(target, s3c24xx_info->data, data);
 116         return ERROR_OK;
 117 }