文件系统转换 Bootloader之uBoot简介（转）(29)

124 {

125 S3C2440_NAND * const s3c2440nand = S3C2440_GetBase_NAND();

126

127 return (s3c2440nand->NFSTAT & S3C2440_NFSTAT_READY);

128 }

129

130 /*

131 * Nand flash硬件初始化:

132 * 设置NAND Flash的时序, 使能NAND Flash控制器

133 */

134 static void s3c24x0_nand_inithw(void)

135 {

136 S3C2410_NAND * const s3c2410nand = S3C2410_GetBase_NAND();

137 S3C2440_NAND * const s3c2440nand = S3C2440_GetBase_NAND();

138

139 #define TACLS 0

140 #define TWRPH0 4

141 #define TWRPH1 2

142

143 if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410)

144 {

145 /* 使能NAND Flash控制器，初始化ECC，使能片选信号，设置时序 */

146 s3c2410nand->NFCONF = (1<<15)|(1<<12)|(1<<11)|(TACLS<<8)|(TWRPH0<<4)|(TWRPH1<<0);

147 }

148 else

149 {

150 /* 设置时序 */

151 s3c2440nand->NFCONF = (TACLS<<12)|(TWRPH0<<8)|(TWRPH1<<4);

152 /* 初始化ECC，使能NAND Flash控制器，使能片选信号 */

153 s3c2440nand->NFCONT = (1<<4)|(0<<1)|(1<<0);

154 }

155 }

156

157 /*

158 * 被drivers/nand/nand.c调用, 初始化NAND Flash硬件，初始化访问接口函数

159 */

160 void board_nand_init(struct nand_chip *chip)

161 {

162 S3C2410_NAND * const s3c2410nand = S3C2410_GetBase_NAND();

163 S3C2440_NAND * const s3c2440nand = S3C2440_GetBase_NAND();

164

165 s3c24x0_nand_inithw();/* Nand flash硬件初始化 */

166

167 if (gd->bd->bi_arch_number == MACH_TYPE_SMDK2410) {

168 chip->IO_ADDR_R = (void *)&s3c2410nand->NFDATA;

169 chip->IO_ADDR_W = (void *)&s3c2410nand->NFDATA;

170 chip->hwcontrol = s3c2410_nand_hwcontrol;

171 chip->dev_ready = s3c2410_nand_devready;

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