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   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 /***************************************************************************
   4  *   Copyright (C) 2007, 2008 by Ben Dooks                                 *
   5  *   ben@fluff.org                                                         *
   6  ***************************************************************************/
   7
   8 /*
   9  * S3C24XX Series OpenOCD NAND Flash controller support.
  10  *
  11  * Many thanks to Simtec Electronics for sponsoring this work.
  12  */
  13
  14 #ifdef HAVE_CONFIG_H
  15 #include "config.h"
  16 #endif
  17
  18 #include "s3c24xx.h"
  19
  20 S3C24XX_DEVICE_COMMAND()
  21 {
  22         *info = NULL;
  23
  24         struct s3c24xx_nand_controller *s3c24xx_info;
  25         s3c24xx_info = malloc(sizeof(struct s3c24xx_nand_controller));
  26         if (!s3c24xx_info) {
  27                 LOG_ERROR("no memory for nand controller");
  28                 return -ENOMEM;
  29         }
  30
  31         nand->controller_priv = s3c24xx_info;
  32         *info = s3c24xx_info;
  33
  34         return ERROR_OK;
  35 }
  36
  37 int s3c24xx_reset(struct nand_device *nand)
  38 {
  39         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  40         struct target *target = nand->target;
  41
  42         if (target->state != TARGET_HALTED) {
  43                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  44                 return ERROR_NAND_OPERATION_FAILED;
  45         }
  46
  47         target_write_u32(target, s3c24xx_info->cmd, 0xff);
  48
  49         return ERROR_OK;
  50 }
  51
  52 int s3c24xx_command(struct nand_device *nand, uint8_t command)
  53 {
  54         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  55         struct target *target = nand->target;
  56
  57         if (target->state != TARGET_HALTED) {
  58                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  59                 return ERROR_NAND_OPERATION_FAILED;
  60         }
  61
  62         target_write_u16(target, s3c24xx_info->cmd, command);
  63         return ERROR_OK;
  64 }
  65
  66 int s3c24xx_address(struct nand_device *nand, uint8_t address)
  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->addr, address);
  77         return ERROR_OK;
  78 }
  79
  80 int s3c24xx_write_data(struct nand_device *nand, uint16_t data)
  81 {
  82         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  83         struct target *target = nand->target;
  84
  85         if (target->state != TARGET_HALTED) {
  86                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
  87                 return ERROR_NAND_OPERATION_FAILED;
  88         }
  89
  90         target_write_u8(target, s3c24xx_info->data, data);
  91         return ERROR_OK;
  92 }
  93
  94 int s3c24xx_read_data(struct nand_device *nand, void *data)
  95 {
  96         struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
  97         struct target *target = nand->target;
  98
  99         if (target->state != TARGET_HALTED) {
 100                 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
 101                 return ERROR_NAND_OPERATION_FAILED;
 102         }
 103
 104         target_read_u8(target, s3c24xx_info->data, data);
 105         return ERROR_OK;
 106 }