git.gag.com Git - fw/openocd/blob - 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  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, 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
  34 S3C24XX_DEVICE_COMMAND()
  35 {
  36         *info = NULL;
  37
  38         struct s3c24xx_nand_controller *s3c24xx_info;
  39         s3c24xx_info = malloc(sizeof(struct s3c24xx_nand_controller));
  40         if (s3c24xx_info == NULL) {
  41                 LOG_ERROR("no memory for nand controller");
  42                 return -ENOMEM;
  43         }
  44
  45         nand->controller_priv = s3c24xx_info;
  46         *info = s3c24xx_info;
  47
  48         return ERROR_OK;
  49 }
  50
  51 int s3c24xx_reset(struct nand_device *nand)
  52 {
  53         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  54         struct target *target = nand->target;
  55
  56         if (target->state != TARGET_HALTED) {
  57                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  58                 return ERROR_NAND_OPERATION_FAILED;
  59         }
  60
  61         target_write_u32(target, s3c24xx_info->cmd, 0xff);
  62
  63         return ERROR_OK;
  64 }
  65
  66 int s3c24xx_command(struct nand_device *nand, uint8_t command)
  67 {
  68         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  69         struct target *target = nand->target;
  70
  71         if (target->state != TARGET_HALTED) {
  72                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  73                 return ERROR_NAND_OPERATION_FAILED;
  74         }
  75
  76         target_write_u16(target, s3c24xx_info->cmd, command);
  77         return ERROR_OK;
  78 }
  79
  80
  81 int s3c24xx_address(struct nand_device *nand, uint8_t address)
  82 {
  83         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  84         struct target *target = nand->target;
  85
  86         if (target->state != TARGET_HALTED) {
  87                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  88                 return ERROR_NAND_OPERATION_FAILED;
  89         }
  90
  91         target_write_u16(target, s3c24xx_info->addr, address);
  92         return ERROR_OK;
  93 }
  94
  95 int s3c24xx_write_data(struct nand_device *nand, uint16_t data)
  96 {
  97         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  98         struct target *target = nand->target;
  99
 100         if (target->state != TARGET_HALTED) {
 101                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
 102                 return ERROR_NAND_OPERATION_FAILED;
 103         }
 104
 105         target_write_u8(target, s3c24xx_info->data, data);
 106         return ERROR_OK;
 107 }
 108
 109 int s3c24xx_read_data(struct nand_device *nand, void *data)
 110 {
 111         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
 112         struct target *target = nand->target;
 113
 114         if (target->state != TARGET_HALTED) {
 115                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
 116                 return ERROR_NAND_OPERATION_FAILED;
 117         }
 118
 119         target_read_u8(target, s3c24xx_info->data, data);
 120         return ERROR_OK;
 121 }