1 /* src/flash/s3c2410_nand.c
3 * S3C2410 OpenOCD NAND Flash controller support.
5 * Copyright 2007,2008 Ben Dooks <ben@fluff.org>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
12 * Many thanks to Simtec Electronics for sponsoring this work.
19 #include "replacements.h"
26 #include "s3c24xx_nand.h"
29 int s3c2410_nand_device_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc, struct nand_device_s *device);
30 int s3c2410_init(struct nand_device_s *device);
31 int s3c2410_read_data(struct nand_device_s *device, void *data);
32 int s3c2410_write_data(struct nand_device_s *device, u16 data);
33 int s3c2410_nand_ready(struct nand_device_s *device, int timeout);
35 nand_flash_controller_t s3c2410_nand_controller =
38 .nand_device_command = s3c2410_nand_device_command,
39 .register_commands = s3c24xx_register_commands,
41 .reset = s3c24xx_reset,
42 .command = s3c24xx_command,
43 .address = s3c24xx_address,
44 .write_data = s3c2410_write_data,
45 .read_data = s3c2410_read_data,
46 .write_page = s3c24xx_write_page,
47 .read_page = s3c24xx_read_page,
48 .controller_ready = s3c24xx_controller_ready,
49 .nand_ready = s3c2410_nand_ready,
52 int s3c2410_nand_device_command(struct command_context_s *cmd_ctx, char *cmd,
53 char **args, int argc,
54 struct nand_device_s *device)
56 s3c24xx_nand_controller_t *info;
58 info = s3c24xx_nand_device_command(cmd_ctx, cmd, args, argc, device);
60 return ERROR_NAND_DEVICE_INVALID;
63 /* fill in the address fields for the core device */
64 info->cmd = S3C2410_NFCMD;
65 info->addr = S3C2410_NFADDR;
66 info->data = S3C2410_NFDATA;
67 info->nfstat = S3C2410_NFSTAT;
72 int s3c2410_init(struct nand_device_s *device)
74 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
75 target_t *target = s3c24xx_info->target;
77 target_write_u32(target, S3C2410_NFCONF,
78 S3C2410_NFCONF_EN | S3C2410_NFCONF_TACLS(3) |
79 S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3));
84 int s3c2410_write_data(struct nand_device_s *device, u16 data)
86 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
87 target_t *target = s3c24xx_info->target;
89 if (target->state != TARGET_HALTED) {
90 ERROR("target must be halted to use S3C24XX NAND flash controller");
91 return ERROR_NAND_OPERATION_FAILED;
94 target_write_u32(target, S3C2410_NFDATA, data);
98 int s3c2410_read_data(struct nand_device_s *device, void *data)
100 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
101 target_t *target = s3c24xx_info->target;
103 if (target->state != TARGET_HALTED) {
104 ERROR("target must be halted to use S3C24XX NAND flash controller");
105 return ERROR_NAND_OPERATION_FAILED;
108 target_read_u8(target, S3C2410_NFDATA, data);
112 int s3c2410_nand_ready(struct nand_device_s *device, int timeout)
114 s3c24xx_nand_controller_t *s3c24xx_info = device->controller_priv;
115 target_t *target = s3c24xx_info->target;
118 if (target->state != TARGET_HALTED) {
119 ERROR("target must be halted to use S3C24XX NAND flash controller");
120 return ERROR_NAND_OPERATION_FAILED;
124 target_read_u8(target, S3C2410_NFSTAT, &status);
126 if (status & S3C2410_NFSTAT_BUSY)
130 } while (timeout-- > 0);