src/flash/s3c2412_nand.c

   1 /* src/flash/s3c2412_nand.c
   2  *
   3  * S3C2412 OpenOCD NAND Flash controller support.
   4  *
   5  * Copyright 2007,2008 Ben Dooks <ben@fluff.org>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * Many thanks to Simtec Electronics for sponsoring this work.
  13  */
  14
  15 #ifdef HAVE_CONFIG_H
  16 #include "config.h"
  17 #endif
  18
  19 #include "replacements.h"
  20 #include "log.h"
  21
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include "nand.h"
  26 #include "s3c24xx_nand.h"
  27 #include "target.h"
  28
  29 int s3c2412_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct nand_device_s *device);
  30 int s3c2412_init(struct nand_device_s *device);
  31
  32 nand_flash_controller_t s3c2412_nand_controller =
  33 {
  34         .name                   = "s3c2412",
  35         .nand_device_command    = s3c2412_nand_device_command,
  36         .register_commands      = s3c24xx_register_commands,
  37         .init                   = s3c2412_init,
  38         .reset                  = s3c24xx_reset,
  39         .command                = s3c24xx_command,
  40         .address                = s3c24xx_address,
  41         .write_data             = s3c24xx_write_data,
  42         .read_data              = s3c24xx_read_data,
  43         .write_page             = s3c24xx_write_page,
  44         .read_page              = s3c24xx_read_page,
  45         .write_block_data       = s3c2440_write_block_data,
  46         .read_block_data        = s3c2440_read_block_data,
  47         .controller_ready       = s3c24xx_controller_ready,
  48         .nand_ready             = s3c2440_nand_ready,
  49 };
  50
  51 int s3c2412_nand_device_command(struct command_context_s *cmd_ctx, char *cmd,
  52                                 char **args, int argc,
  53                                 struct nand_device_s *device)
  54 {
  55         s3c24xx_nand_controller_t *info;
  56
  57         info = s3c24xx_nand_device_command(cmd_ctx, cmd, args, argc, device);
  58         if (info == NULL) {
  59                 return ERROR_NAND_DEVICE_INVALID;
  60         }
  61
  62         /* fill in the address fields for the core device */
  63         info->cmd = S3C2440_NFCMD;
  64         info->addr = S3C2440_NFADDR;
  65         info->data = S3C2440_NFDATA;
  66         info->nfstat = S3C2412_NFSTAT;
  67
  68         return ERROR_OK;
  69 }
  70
  71 int s3c2412_init(struct nand_device_s *device)
  72 {
  73         s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
  74         target_t *target = s3c24xx_info->target;
  75
  76         target_write_u32(target, S3C2410_NFCONF,
  77                          S3C2440_NFCONF_TACLS(3) |
  78                          S3C2440_NFCONF_TWRPH0(7) |
  79                          S3C2440_NFCONF_TWRPH1(7));
  80
  81         target_write_u32(target, S3C2440_NFCONT,
  82                          S3C2412_NFCONT_INIT_MAIN_ECC |
  83                          S3C2440_NFCONT_ENABLE);
  84
  85         return ERROR_OK;
  86 }