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.
33 NAND_DEVICE_COMMAND_HANDLER(s3c2410_nand_device_command
)
35 struct s3c24xx_nand_controller
*info
;
36 CALL_S3C24XX_DEVICE_COMMAND(nand
, &info
);
38 /* fill in the address fields for the core device */
39 info
->cmd
= S3C2410_NFCMD
;
40 info
->addr
= S3C2410_NFADDR
;
41 info
->data
= S3C2410_NFDATA
;
42 info
->nfstat
= S3C2410_NFSTAT
;
47 static int s3c2410_init(struct nand_device
*nand
)
49 struct s3c24xx_nand_controller
*s3c24xx_info
= nand
->controller_priv
;
50 struct target
*target
= s3c24xx_info
->target
;
52 target_write_u32(target
, S3C2410_NFCONF
,
53 S3C2410_NFCONF_EN
| S3C2410_NFCONF_TACLS(3) |
54 S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3));
59 static int s3c2410_write_data(struct nand_device
*nand
, uint16_t data
)
61 struct s3c24xx_nand_controller
*s3c24xx_info
= nand
->controller_priv
;
62 struct target
*target
= s3c24xx_info
->target
;
64 if (target
->state
!= TARGET_HALTED
) {
65 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
66 return ERROR_NAND_OPERATION_FAILED
;
69 target_write_u32(target
, S3C2410_NFDATA
, data
);
73 static int s3c2410_read_data(struct nand_device
*nand
, void *data
)
75 struct s3c24xx_nand_controller
*s3c24xx_info
= nand
->controller_priv
;
76 struct target
*target
= s3c24xx_info
->target
;
78 if (target
->state
!= TARGET_HALTED
) {
79 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
80 return ERROR_NAND_OPERATION_FAILED
;
83 target_read_u8(target
, S3C2410_NFDATA
, data
);
87 static int s3c2410_nand_ready(struct nand_device
*nand
, int timeout
)
89 struct s3c24xx_nand_controller
*s3c24xx_info
= nand
->controller_priv
;
90 struct target
*target
= s3c24xx_info
->target
;
93 if (target
->state
!= TARGET_HALTED
) {
94 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
95 return ERROR_NAND_OPERATION_FAILED
;
99 target_read_u8(target
, S3C2410_NFSTAT
, &status
);
101 if (status
& S3C2410_NFSTAT_BUSY
)
105 } while (timeout
-- > 0);
110 struct nand_flash_controller s3c2410_nand_controller
= {
112 .nand_device_command
= &s3c2410_nand_device_command
,
113 .init
= &s3c2410_init
,
114 .reset
= &s3c24xx_reset
,
115 .command
= &s3c24xx_command
,
116 .address
= &s3c24xx_address
,
117 .write_data
= &s3c2410_write_data
,
118 .read_data
= &s3c2410_read_data
,
119 .write_page
= s3c24xx_write_page
,
120 .read_page
= s3c24xx_read_page
,
121 .controller_ready
= &s3c24xx_controller_ready
,
122 .nand_ready
= &s3c2410_nand_ready
,