2 * (C) Copyright 2006 OpenMoko, Inc.
3 * Author: Harald Welte <laforge@openmoko.org>
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation; either version 2 of
8 * the License, or (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 Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #define DEBUGN(x, args ...) {}
29 #if defined(CONFIG_CMD_NAND)
30 #if !defined(CFG_NAND_LEGACY)
35 #define __REGb(x) (*(volatile unsigned char *)(x))
36 #define __REGi(x) (*(volatile unsigned int *)(x))
38 #define NF_BASE 0x4e000000
39 #define NFCONF __REGi(NF_BASE + 0x0)
40 #define NFCMD __REGb(NF_BASE + 0x4)
41 #define NFADDR __REGb(NF_BASE + 0x8)
42 #define NFDATA __REGb(NF_BASE + 0xc)
43 #define NFSTAT __REGb(NF_BASE + 0x10)
44 #define NFECC0 __REGb(NF_BASE + 0x14)
45 #define NFECC1 __REGb(NF_BASE + 0x15)
46 #define NFECC2 __REGb(NF_BASE + 0x16)
48 #define S3C2410_NFCONF_EN (1<<15)
49 #define S3C2410_NFCONF_512BYTE (1<<14)
50 #define S3C2410_NFCONF_4STEP (1<<13)
51 #define S3C2410_NFCONF_INITECC (1<<12)
52 #define S3C2410_NFCONF_nFCE (1<<11)
53 #define S3C2410_NFCONF_TACLS(x) ((x)<<8)
54 #define S3C2410_NFCONF_TWRPH0(x) ((x)<<4)
55 #define S3C2410_NFCONF_TWRPH1(x) ((x)<<0)
57 static void s3c2410_hwcontrol(struct mtd_info *mtd, int cmd)
59 struct nand_chip *chip = mtd->priv;
61 DEBUGN("hwcontrol(): 0x%02x: ", cmd);
65 NFCONF &= ~S3C2410_NFCONF_nFCE;
66 DEBUGN("NFCONF=0x%08x\n", NFCONF);
69 NFCONF |= S3C2410_NFCONF_nFCE;
70 DEBUGN("NFCONF=0x%08x\n", NFCONF);
73 chip->IO_ADDR_W = NF_BASE + 0x8;
77 chip->IO_ADDR_W = NF_BASE + 0x4;
81 chip->IO_ADDR_W = NF_BASE + 0xc;
87 static int s3c2410_dev_ready(struct mtd_info *mtd)
89 DEBUGN("dev_ready\n");
90 return (NFSTAT & 0x01);
93 #ifdef CONFIG_S3C2410_NAND_HWECC
94 void s3c2410_nand_enable_hwecc(struct mtd_info *mtd, int mode)
96 DEBUGN("s3c2410_nand_enable_hwecc(%p, %d)\n", mtd ,mode);
97 NFCONF |= S3C2410_NFCONF_INITECC;
100 static int s3c2410_nand_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
103 ecc_code[0] = NFECC0;
104 ecc_code[1] = NFECC1;
105 ecc_code[2] = NFECC2;
106 DEBUGN("s3c2410_nand_calculate_hwecc(%p,): 0x%02x 0x%02x 0x%02x\n",
107 mtd , ecc_code[0], ecc_code[1], ecc_code[2]);
112 static int s3c2410_nand_correct_data(struct mtd_info *mtd, u_char *dat,
113 u_char *read_ecc, u_char *calc_ecc)
115 if (read_ecc[0] == calc_ecc[0] &&
116 read_ecc[1] == calc_ecc[1] &&
117 read_ecc[2] == calc_ecc[2])
120 printf("s3c2410_nand_correct_data: not implemented\n");
125 int board_nand_init(struct nand_chip *nand)
128 u_int8_t tacls, twrph0, twrph1;
129 S3C24X0_CLOCK_POWER * const clk_power = S3C24X0_GetBase_CLOCK_POWER();
131 DEBUGN("board_nand_init()\n");
133 clk_power->CLKCON |= (1 << 4);
135 /* initialize hardware */
136 twrph0 = 3; twrph1 = 0; tacls = 0;
138 cfg = S3C2410_NFCONF_EN;
139 cfg |= S3C2410_NFCONF_TACLS(tacls - 1);
140 cfg |= S3C2410_NFCONF_TWRPH0(twrph0 - 1);
141 cfg |= S3C2410_NFCONF_TWRPH1(twrph1 - 1);
145 /* initialize nand_chip data structure */
146 nand->IO_ADDR_R = nand->IO_ADDR_W = 0x4e00000c;
148 /* read_buf and write_buf are default */
149 /* read_byte and write_byte are default */
151 /* hwcontrol always must be implemented */
152 nand->hwcontrol = s3c2410_hwcontrol;
154 nand->dev_ready = s3c2410_dev_ready;
156 #ifdef CONFIG_S3C2410_NAND_HWECC
157 nand->enable_hwecc = s3c2410_nand_enable_hwecc;
158 nand->calculate_ecc = s3c2410_nand_calculate_ecc;
159 nand->correct_data = s3c2410_nand_correct_data;
160 nand->eccmode = NAND_ECC_HW3_512;
162 nand->eccmode = NAND_ECC_SOFT;
165 #ifdef CONFIG_S3C2410_NAND_BBT
166 nand->options = NAND_USE_FLASH_BBT;
171 DEBUGN("end of nand_init\n");
177 #error "U-Boot legacy NAND support not available for S3C2410"