| Peter Tyser | 1f03cbf | 2008-12-23 16:32:00 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2008 Extreme Engineering Solutions, Inc. |
| 3 | * |
| 4 | * This driver support NAND devices which have address lines |
| 5 | * connected as ALE and CLE inputs. |
| 6 | * |
| 7 | * See file CREDITS for list of people who contributed to this |
| 8 | * project. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License as |
| 12 | * published by the Free Software Foundation; either version 2 of |
| 13 | * the License, or (at your option) any later version. |
| 14 | * |
| 15 | * This program is distributed in the hope that it will be useful, |
| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 18 | * GNU General Public License for more details. |
| 19 | * |
| 20 | * You should have received a copy of the GNU General Public License |
| 21 | * along with this program; if not, write to the Free Software |
| 22 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| 23 | * MA 02111-1307 USA |
| 24 | */ |
| 25 | |
| 26 | #include <common.h> |
| 27 | #include <nand.h> |
| 28 | #include <asm/io.h> |
| 29 | |
| 30 | /* |
| 31 | * Hardware specific access to control-lines |
| 32 | */ |
| 33 | static void nand_addr_hwcontrol(struct mtd_info *mtd, int cmd, uint ctrl) |
| 34 | { |
| 35 | struct nand_chip *this = mtd->priv; |
| 36 | ulong IO_ADDR_W; |
| 37 | |
| 38 | if (ctrl & NAND_CTRL_CHANGE) { |
| 39 | IO_ADDR_W = (ulong)this->IO_ADDR_W; |
| 40 | |
| 41 | IO_ADDR_W &= ~(CONFIG_SYS_NAND_ACTL_CLE | |
| 42 | CONFIG_SYS_NAND_ACTL_ALE | |
| 43 | CONFIG_SYS_NAND_ACTL_NCE); |
| 44 | if (ctrl & NAND_CLE) |
| 45 | IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_CLE; |
| 46 | if (ctrl & NAND_ALE) |
| 47 | IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_ALE; |
| 48 | if (ctrl & NAND_NCE) |
| 49 | IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_NCE; |
| 50 | |
| 51 | this->IO_ADDR_W = (void *)IO_ADDR_W; |
| 52 | } |
| 53 | |
| 54 | if (cmd != NAND_CMD_NONE) |
| 55 | writeb(cmd, this->IO_ADDR_W); |
| 56 | } |
| 57 | |
| 58 | int board_nand_init(struct nand_chip *nand) |
| 59 | { |
| 60 | nand->ecc.mode = NAND_ECC_SOFT; |
| 61 | nand->cmd_ctrl = nand_addr_hwcontrol; |
| 62 | nand->chip_delay = CONFIG_SYS_NAND_ACTL_DELAY; |
| 63 | |
| 64 | return 0; |
| 65 | } |