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, see <http://www.gnu.org/licenses/>. *
17 ***************************************************************************/
20 * S3C2410 OpenOCD NAND Flash controller support.
22 * Many thanks to Simtec Electronics for sponsoring this work.
31 NAND_DEVICE_COMMAND_HANDLER(s3c2410_nand_device_command
)
33 struct s3c24xx_nand_controller
*info
;
34 CALL_S3C24XX_DEVICE_COMMAND(nand
, &info
);
36 /* fill in the address fields for the core device */
37 info
->cmd
= S3C2410_NFCMD
;
38 info
->addr
= S3C2410_NFADDR
;
39 info
->data
= S3C2410_NFDATA
;
40 info
->nfstat
= S3C2410_NFSTAT
;
45 static int s3c2410_init(struct nand_device
*nand
)
47 struct target
*target
= nand
->target
;
49 target_write_u32(target
, S3C2410_NFCONF
,
50 S3C2410_NFCONF_EN
| S3C2410_NFCONF_TACLS(3) |
51 S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3));
56 static int s3c2410_write_data(struct nand_device
*nand
, uint16_t data
)
58 struct target
*target
= nand
->target
;
60 if (target
->state
!= TARGET_HALTED
) {
61 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
62 return ERROR_NAND_OPERATION_FAILED
;
65 target_write_u32(target
, S3C2410_NFDATA
, data
);
69 static int s3c2410_read_data(struct nand_device
*nand
, void *data
)
71 struct target
*target
= nand
->target
;
73 if (target
->state
!= TARGET_HALTED
) {
74 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
75 return ERROR_NAND_OPERATION_FAILED
;
78 target_read_u8(target
, S3C2410_NFDATA
, data
);
82 static int s3c2410_nand_ready(struct nand_device
*nand
, int timeout
)
84 struct target
*target
= nand
->target
;
87 if (target
->state
!= TARGET_HALTED
) {
88 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
89 return ERROR_NAND_OPERATION_FAILED
;
93 target_read_u8(target
, S3C2410_NFSTAT
, &status
);
95 if (status
& S3C2410_NFSTAT_BUSY
)
99 } while (timeout
-- > 0);
104 struct nand_flash_controller s3c2410_nand_controller
= {
106 .nand_device_command
= &s3c2410_nand_device_command
,
107 .init
= &s3c2410_init
,
108 .reset
= &s3c24xx_reset
,
109 .command
= &s3c24xx_command
,
110 .address
= &s3c24xx_address
,
111 .write_data
= &s3c2410_write_data
,
112 .read_data
= &s3c2410_read_data
,
113 .write_page
= s3c24xx_write_page
,
114 .read_page
= s3c24xx_read_page
,
115 .nand_ready
= &s3c2410_nand_ready
,