1 /***************************************************************************
2 * Copyright (C) 2007, 2008 by Ben Dooks *
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. *
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. *
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 ***************************************************************************/
22 * S3C2410 OpenOCD NAND Flash controller support.
24 * Many thanks to Simtec Electronics for sponsoring this work.
31 #include "replacements.h"
38 #include "s3c24xx_nand.h"
41 int s3c2410_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct nand_device_s *device);
42 int s3c2410_init(struct nand_device_s *device);
43 int s3c2410_read_data(struct nand_device_s *device, void *data);
44 int s3c2410_write_data(struct nand_device_s *device, u16 data);
45 int s3c2410_nand_ready(struct nand_device_s *device, int timeout);
47 nand_flash_controller_t s3c2410_nand_controller =
50 .nand_device_command = s3c2410_nand_device_command,
51 .register_commands = s3c24xx_register_commands,
53 .reset = s3c24xx_reset,
54 .command = s3c24xx_command,
55 .address = s3c24xx_address,
56 .write_data = s3c2410_write_data,
57 .read_data = s3c2410_read_data,
58 .write_page = s3c24xx_write_page,
59 .read_page = s3c24xx_read_page,
60 .controller_ready = s3c24xx_controller_ready,
61 .nand_ready = s3c2410_nand_ready,
64 int s3c2410_nand_device_command(struct command_context_s *cmd_ctx, char *cmd,
65 char **args, int argc,
66 struct nand_device_s *device)
68 s3c24xx_nand_controller_t *info;
70 info = s3c24xx_nand_device_command(cmd_ctx, cmd, args, argc, device);
72 return ERROR_NAND_DEVICE_INVALID;
75 /* fill in the address fields for the core device */
76 info->cmd = S3C2410_NFCMD;
77 info->addr = S3C2410_NFADDR;
78 info->data = S3C2410_NFDATA;
79 info->nfstat = S3C2410_NFSTAT;
84 int s3c2410_init(struct nand_device_s *device)
86 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
87 target_t *target = s3c24xx_info->target;
89 target_write_u32(target, S3C2410_NFCONF,
90 S3C2410_NFCONF_EN | S3C2410_NFCONF_TACLS(3) |
91 S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3));
96 int s3c2410_write_data(struct nand_device_s *device, u16 data)
98 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
99 target_t *target = s3c24xx_info->target;
101 if (target->state != TARGET_HALTED) {
102 ERROR("target must be halted to use S3C24XX NAND flash controller");
103 return ERROR_NAND_OPERATION_FAILED;
106 target_write_u32(target, S3C2410_NFDATA, data);
110 int s3c2410_read_data(struct nand_device_s *device, void *data)
112 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
113 target_t *target = s3c24xx_info->target;
115 if (target->state != TARGET_HALTED) {
116 ERROR("target must be halted to use S3C24XX NAND flash controller");
117 return ERROR_NAND_OPERATION_FAILED;
120 target_read_u8(target, S3C2410_NFDATA, data);
124 int s3c2410_nand_ready(struct nand_device_s *device, int timeout)
126 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
127 target_t *target = s3c24xx_info->target;
130 if (target->state != TARGET_HALTED) {
131 ERROR("target must be halted to use S3C24XX NAND flash controller");
132 return ERROR_NAND_OPERATION_FAILED;
136 target_read_u8(target, S3C2410_NFSTAT, &status);
138 if (status & S3C2410_NFSTAT_BUSY)
142 } while (timeout-- > 0);