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 * SPDX-License-Identifier: GPL-2.0+ 8 */ 9 10 #include <common.h> 11 #include <nand.h> 12 #include <asm/io.h> 13 14 /* 15 * Hardware specific access to control-lines 16 */ 17 static void nand_addr_hwcontrol(struct mtd_info *mtd, int cmd, uint ctrl) 18 { 19 struct nand_chip *this = mtd_to_nand(mtd); 20 ulong IO_ADDR_W; 21 22 if (ctrl & NAND_CTRL_CHANGE) { 23 IO_ADDR_W = (ulong)this->IO_ADDR_W; 24 25 IO_ADDR_W &= ~(CONFIG_SYS_NAND_ACTL_CLE | 26 CONFIG_SYS_NAND_ACTL_ALE | 27 CONFIG_SYS_NAND_ACTL_NCE); 28 if (ctrl & NAND_CLE) 29 IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_CLE; 30 if (ctrl & NAND_ALE) 31 IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_ALE; 32 if (ctrl & NAND_NCE) 33 IO_ADDR_W |= CONFIG_SYS_NAND_ACTL_NCE; 34 35 this->IO_ADDR_W = (void *)IO_ADDR_W; 36 } 37 38 if (cmd != NAND_CMD_NONE) 39 writeb(cmd, this->IO_ADDR_W); 40 } 41 42 int board_nand_init(struct nand_chip *nand) 43 { 44 nand->ecc.mode = NAND_ECC_SOFT; 45 nand->cmd_ctrl = nand_addr_hwcontrol; 46 nand->chip_delay = CONFIG_SYS_NAND_ACTL_DELAY; 47 48 return 0; 49 } 50