src/flash/s3c2412_nand.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  * S3C2412 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_nand.h"
  32
  33
  34 static int s3c2412_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct nand_device_s *device);
  35 static int s3c2412_init(struct nand_device_s *device);
  36
  37 nand_flash_controller_t s3c2412_nand_controller =
  38 {
  39         .name                   = "s3c2412",
  40         .nand_device_command    = s3c2412_nand_device_command,
  41         .register_commands      = s3c24xx_register_commands,
  42         .init                   = s3c2412_init,
  43         .reset                  = s3c24xx_reset,
  44         .command                = s3c24xx_command,
  45         .address                = s3c24xx_address,
  46         .write_data             = s3c24xx_write_data,
  47         .read_data              = s3c24xx_read_data,
  48         .write_page             = s3c24xx_write_page,
  49         .read_page              = s3c24xx_read_page,
  50         .write_block_data       = s3c2440_write_block_data,
  51         .read_block_data        = s3c2440_read_block_data,
  52         .controller_ready       = s3c24xx_controller_ready,
  53         .nand_ready             = s3c2440_nand_ready,
  54 };
  55
  56 static int s3c2412_nand_device_command(struct command_context_s *cmd_ctx, char *cmd,
  57                                 char **args, int argc,
  58                                 struct nand_device_s *device)
  59 {
  60         s3c24xx_nand_controller_t *info;
  61
  62         info = s3c24xx_nand_device_command(cmd_ctx, cmd, args, argc, device);
  63         if (info == NULL) {
  64                 return ERROR_NAND_DEVICE_INVALID;
  65         }
  66
  67         /* fill in the address fields for the core device */
  68         info->cmd = S3C2440_NFCMD;
  69         info->addr = S3C2440_NFADDR;
  70         info->data = S3C2440_NFDATA;
  71         info->nfstat = S3C2412_NFSTAT;
  72
  73         return ERROR_OK;
  74 }
  75
  76 static int s3c2412_init(struct nand_device_s *device)
  77 {
  78         s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
  79         target_t *target = s3c24xx_info->target;
  80
  81         target_write_u32(target, S3C2410_NFCONF,
  82                          S3C2440_NFCONF_TACLS(3) |
  83                          S3C2440_NFCONF_TWRPH0(7) |
  84                          S3C2440_NFCONF_TWRPH1(7));
  85
  86         target_write_u32(target, S3C2440_NFCONT,
  87                          S3C2412_NFCONT_INIT_MAIN_ECC |
  88                          S3C2440_NFCONT_ENABLE);
  89
  90         return ERROR_OK;
  91 }