2aff7a8982ef704b66ac9b4e49aa70c499d6d47b
[openocd.git] / src / flash / nand / s3c2410.c
1 /***************************************************************************
2 * Copyright (C) 2007, 2008 by Ben Dooks *
3 * ben@fluff.org *
4 * *
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. *
9 * *
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. *
14 * *
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 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
19 ***************************************************************************/
20
21 /*
22 * S3C2410 OpenOCD NAND Flash controller support.
23 *
24 * Many thanks to Simtec Electronics for sponsoring this work.
25 */
26
27 #ifdef HAVE_CONFIG_H
28 #include "config.h"
29 #endif
30
31 #include "s3c24xx.h"
32
33 NAND_DEVICE_COMMAND_HANDLER(s3c2410_nand_device_command)
34 {
35 struct s3c24xx_nand_controller *info;
36 CALL_S3C24XX_DEVICE_COMMAND(nand, &info);
37
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;
43
44 return ERROR_OK;
45 }
46
47 static int s3c2410_init(struct nand_device *nand)
48 {
49 struct target *target = nand->target;
50
51 target_write_u32(target, S3C2410_NFCONF,
52 S3C2410_NFCONF_EN | S3C2410_NFCONF_TACLS(3) |
53 S3C2410_NFCONF_TWRPH0(5) | S3C2410_NFCONF_TWRPH1(3));
54
55 return ERROR_OK;
56 }
57
58 static int s3c2410_write_data(struct nand_device *nand, uint16_t data)
59 {
60 struct target *target = nand->target;
61
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;
65 }
66
67 target_write_u32(target, S3C2410_NFDATA, data);
68 return ERROR_OK;
69 }
70
71 static int s3c2410_read_data(struct nand_device *nand, void *data)
72 {
73 struct target *target = nand->target;
74
75 if (target->state != TARGET_HALTED) {
76 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
77 return ERROR_NAND_OPERATION_FAILED;
78 }
79
80 target_read_u8(target, S3C2410_NFDATA, data);
81 return ERROR_OK;
82 }
83
84 static int s3c2410_nand_ready(struct nand_device *nand, int timeout)
85 {
86 struct target *target = nand->target;
87 uint8_t status;
88
89 if (target->state != TARGET_HALTED) {
90 LOG_ERROR("target must be halted to use S3C24XX NAND flash controller");
91 return ERROR_NAND_OPERATION_FAILED;
92 }
93
94 do {
95 target_read_u8(target, S3C2410_NFSTAT, &status);
96
97 if (status & S3C2410_NFSTAT_BUSY)
98 return 1;
99
100 alive_sleep(1);
101 } while (timeout-- > 0);
102
103 return 0;
104 }
105
106 struct nand_flash_controller s3c2410_nand_controller = {
107 .name = "s3c2410",
108 .nand_device_command = &s3c2410_nand_device_command,
109 .init = &s3c2410_init,
110 .reset = &s3c24xx_reset,
111 .command = &s3c24xx_command,
112 .address = &s3c24xx_address,
113 .write_data = &s3c2410_write_data,
114 .read_data = &s3c2410_read_data,
115 .write_page = s3c24xx_write_page,
116 .read_page = s3c24xx_read_page,
117 .nand_ready = &s3c2410_nand_ready,
118 };