3 * Matthias Fuchs, esd gmbh germany, matthias.fuchs@esd-electronics.com
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
26 #if defined(CONFIG_CMD_NAND)
31 * hardware specific access to control-lines
33 static void esd405ep_nand_hwcontrol(struct mtd_info
*mtd
, int cmd
, unsigned int ctrl
)
35 struct nand_chip
*this = mtd
->priv
;
36 if (ctrl
& NAND_CTRL_CHANGE
) {
37 if ( ctrl
& NAND_CLE
)
38 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) | CONFIG_SYS_NAND_CLE
);
40 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) & ~CONFIG_SYS_NAND_CLE
);
41 if ( ctrl
& NAND_ALE
)
42 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) | CONFIG_SYS_NAND_ALE
);
44 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) & ~CONFIG_SYS_NAND_ALE
);
45 if ( ctrl
& NAND_NCE
)
46 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) & ~CONFIG_SYS_NAND_CE
);
48 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) | CONFIG_SYS_NAND_CE
);
51 if (cmd
!= NAND_CMD_NONE
)
52 writeb(cmd
, this->IO_ADDR_W
);
57 * read device ready pin
59 static int esd405ep_nand_device_ready(struct mtd_info
*mtdinfo
)
61 if (in_be32((void *)GPIO0_IR
) & CONFIG_SYS_NAND_RDY
)
67 int board_nand_init(struct nand_chip
*nand
)
70 * Set NAND-FLASH GPIO signals to defaults
72 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) & ~(CONFIG_SYS_NAND_CLE
| CONFIG_SYS_NAND_ALE
));
73 out_be32((void *)GPIO0_OR
, in_be32((void *)GPIO0_OR
) | CONFIG_SYS_NAND_CE
);
76 * Initialize nand_chip structure
78 nand
->cmd_ctrl
= esd405ep_nand_hwcontrol
;
79 nand
->dev_ready
= esd405ep_nand_device_ready
;
80 nand
->ecc
.mode
= NAND_ECC_SOFT
;
81 nand
->chip_delay
= NAND_BIG_DELAY_US
;
82 nand
->options
= NAND_SAMSUNG_LP_OPTIONS
;