1 // SPDX-License-Identifier: GPL-2.0-or-later
3 /***************************************************************************
4 * Copyright (C) 2007, 2008 by Ben Dooks *
6 ***************************************************************************/
9 * S3C2410 OpenOCD NAND Flash controller support.
11 * Many thanks to Simtec Electronics for sponsoring this work.
20 NAND_DEVICE_COMMAND_HANDLER(s3c2410_nand_device_command
)
22 struct s3c24xx_nand_controller
*info
;
23 CALL_S3C24XX_DEVICE_COMMAND(nand
, &info
);
25 /* fill in the address fields for the core device */
26 info
->cmd
= S3C2410_NFCMD
;
27 info
->addr
= S3C2410_NFADDR
;
28 info
->data
= S3C2410_NFDATA
;
29 info
->nfstat
= S3C2410_NFSTAT
;
34 static int s3c2410_init(struct nand_device
*nand
)
36 struct target
*target
= nand
->target
;
38 target_write_u32(target
, S3C2410_NFCONF
,
39 S3C2410_NFCONF_EN
| S3C2410_NFCONF_TACLS(3) |
40 S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3));
45 static int s3c2410_write_data(struct nand_device
*nand
, uint16_t data
)
47 struct target
*target
= nand
->target
;
49 if (target
->state
!= TARGET_HALTED
) {
50 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
51 return ERROR_NAND_OPERATION_FAILED
;
54 target_write_u32(target
, S3C2410_NFDATA
, data
);
58 static int s3c2410_read_data(struct nand_device
*nand
, void *data
)
60 struct target
*target
= nand
->target
;
62 if (target
->state
!= TARGET_HALTED
) {
63 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
64 return ERROR_NAND_OPERATION_FAILED
;
67 target_read_u8(target
, S3C2410_NFDATA
, data
);
71 static int s3c2410_nand_ready(struct nand_device
*nand
, int timeout
)
73 struct target
*target
= nand
->target
;
76 if (target
->state
!= TARGET_HALTED
) {
77 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
78 return ERROR_NAND_OPERATION_FAILED
;
82 target_read_u8(target
, S3C2410_NFSTAT
, &status
);
84 if (status
& S3C2410_NFSTAT_BUSY
)
88 } while (timeout
-- > 0);
93 struct nand_flash_controller s3c2410_nand_controller
= {
95 .nand_device_command
= &s3c2410_nand_device_command
,
96 .init
= &s3c2410_init
,
97 .reset
= &s3c24xx_reset
,
98 .command
= &s3c24xx_command
,
99 .address
= &s3c24xx_address
,
100 .write_data
= &s3c2410_write_data
,
101 .read_data
= &s3c2410_read_data
,
102 .write_page
= s3c24xx_write_page
,
103 .read_page
= s3c24xx_read_page
,
104 .nand_ready
= &s3c2410_nand_ready
,