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, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.           *
  19  ***************************************************************************/
  20
  21 /*
  22  * S3C24XX Series OpenOCD NAND Flash controller support.
  23  *
  24  * Many thanks to Simtec Electronics for sponsoring this work.
  25  */
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include "s3c24xx.h"
  32
  33 S3C24XX_DEVICE_COMMAND()
  34 {
  35         *info = NULL;
  36
  37         struct s3c24xx_nand_controller *s3c24xx_info;
  38         s3c24xx_info = malloc(sizeof(struct s3c24xx_nand_controller));
  39         if (s3c24xx_info == NULL) {
  40                 LOG_ERROR("no memory for nand controller");
  41                 return -ENOMEM;
  42         }
  43
  44         nand->controller_priv = s3c24xx_info;
  45         *info = s3c24xx_info;
  46
  47         return ERROR_OK;
  48 }
  49
  50 int s3c24xx_reset(struct nand_device *nand)
  51 {
  52         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  53         struct target *target = nand->target;
  54
  55         if (target->state != TARGET_HALTED) {
  56                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  57                 return ERROR_NAND_OPERATION_FAILED;
  58         }
  59
  60         target_write_u32(target, s3c24xx_info->cmd, 0xff);
  61
  62         return ERROR_OK;
  63 }
  64
  65 int s3c24xx_command(struct nand_device *nand, uint8_t command)
  66 {
  67         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  68         struct target *target = nand->target;
  69
  70         if (target->state != TARGET_HALTED) {
  71                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  72                 return ERROR_NAND_OPERATION_FAILED;
  73         }
  74
  75         target_write_u16(target, s3c24xx_info->cmd, command);
  76         return ERROR_OK;
  77 }
  78
  79 int s3c24xx_address(struct nand_device *nand, uint8_t address)
  80 {
  81         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  82         struct target *target = nand->target;
  83
  84         if (target->state != TARGET_HALTED) {
  85                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  86                 return ERROR_NAND_OPERATION_FAILED;
  87         }
  88
  89         target_write_u16(target, s3c24xx_info->addr, address);
  90         return ERROR_OK;
  91 }
  92
  93 int s3c24xx_write_data(struct nand_device *nand, uint16_t data)
  94 {
  95         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  96         struct target *target = nand->target;
  97
  98         if (target->state != TARGET_HALTED) {
  99                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
 100                 return ERROR_NAND_OPERATION_FAILED;
 101         }
 102
 103         target_write_u8(target, s3c24xx_info->data, data);
 104         return ERROR_OK;
 105 }
 106
 107 int s3c24xx_read_data(struct nand_device *nand, void *data)
 108 {
 109         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
 110         struct target *target = nand->target;
 111
 112         if (target->state != TARGET_HALTED) {
 113                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
 114                 return ERROR_NAND_OPERATION_FAILED;
 115         }
 116
 117         target_read_u8(target, s3c24xx_info->data, data);
 118         return ERROR_OK;
 119 }