aboutsummaryrefslogtreecommitdiff
path: root/src/flash/s3c24xx_nand.c
blob: 17de5d414be4bc348f4e1d3befc98cd6aa0e5a1e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
/***************************************************************************
 *   Copyright (C) 2007, 2008 by Ben Dooks                                 *
 *   ben@fluff.org                                                         *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the                         *
 *   Free Software Foundation, Inc.,                                       *
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
 ***************************************************************************/

/*
 * S3C24XX Series OpenOCD NAND Flash controller support.
 *
 * Many thanks to Simtec Electronics for sponsoring this work.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "s3c24xx_nand.h"


S3C24XX_DEVICE_COMMAND()
{
	struct s3c24xx_nand_controller *s3c24xx_info;

	s3c24xx_info = malloc(sizeof(struct s3c24xx_nand_controller));
	if (s3c24xx_info == NULL) {
		LOG_ERROR("no memory for nand controller\n");
		return -ENOMEM;
	}

	nand->controller_priv = s3c24xx_info;

	s3c24xx_info->target = get_target(args[1]);
	if (s3c24xx_info->target == NULL) {
		LOG_ERROR("target '%s' not defined", args[1]);
		return ERROR_COMMAND_SYNTAX_ERROR;
	}

	return ERROR_OK;
}

int s3c24xx_register_commands(struct command_context_s *cmd_ctx)
{
	return ERROR_OK;
}

int s3c24xx_reset(struct nand_device_s *nand)
{
	struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
	target_t *target = s3c24xx_info->target;

	if (target->state != TARGET_HALTED) {
		LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
		return ERROR_NAND_OPERATION_FAILED;
	}

	target_write_u32(target, s3c24xx_info->cmd, 0xff);

	return ERROR_OK;
}

int s3c24xx_command(struct nand_device_s *nand, uint8_t command)
{
	struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
	target_t *target = s3c24xx_info->target;

	if (target->state != TARGET_HALTED) {
		LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
		return ERROR_NAND_OPERATION_FAILED;
	}

	target_write_u16(target, s3c24xx_info->cmd, command);
	return ERROR_OK;
}


int s3c24xx_address(struct nand_device_s *nand, uint8_t address)
{
	struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
	target_t *target = s3c24xx_info->target;

	if (target->state != TARGET_HALTED) {
		LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
		return ERROR_NAND_OPERATION_FAILED;
	}

	target_write_u16(target, s3c24xx_info->addr, address);
	return ERROR_OK;
}

int s3c24xx_write_data(struct nand_device_s *nand, uint16_t data)
{
	struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
	target_t *target = s3c24xx_info->target;

	if (target->state != TARGET_HALTED) {
		LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
		return ERROR_NAND_OPERATION_FAILED;
	}

	target_write_u8(target, s3c24xx_info->data, data);
	return ERROR_OK;
}

int s3c24xx_read_data(struct nand_device_s *nand, void *data)
{
	struct s3c24xx_nand_controller *s3c24xx_info = nand->controller_priv;
	target_t *target = s3c24xx_info->target;

	if (target->state != TARGET_HALTED) {
		LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
		return ERROR_NAND_OPERATION_FAILED;
	}

	target_read_u8(target, s3c24xx_info->data, data);
	return ERROR_OK;
}

int s3c24xx_controller_ready(struct nand_device_s *nand, int timeout)
{
	return 1;
}