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1 | /* | |
2 | * (C) Copyright 2000-2003 | |
3 | * Wolfgang Denk, DENX Software Engineering, wd@denx.de. | |
4 | * | |
5 | * Copyright (C) 2004-2007, 2012 Freescale Semiconductor, Inc. | |
6 | * TsiChung Liew (Tsi-Chung.Liew@freescale.com) | |
7 | * | |
8 | * SPDX-License-Identifier: GPL-2.0+ | |
9 | */ | |
10 | ||
11 | #include <config.h> | |
12 | #include <common.h> | |
13 | #include <asm/io.h> | |
14 | #include <asm/immap.h> | |
15 | ||
16 | DECLARE_GLOBAL_DATA_PTR; | |
17 | ||
18 | #if defined(CONFIG_CMD_NAND) | |
19 | #include <nand.h> | |
20 | #include <linux/mtd/mtd.h> | |
21 | ||
22 | #define SET_CLE 0x10 | |
23 | #define SET_ALE 0x08 | |
24 | ||
25 | static void nand_hwcontrol(struct mtd_info *mtdinfo, int cmd, unsigned int ctrl) | |
26 | { | |
27 | struct nand_chip *this = mtdinfo->priv; | |
28 | volatile u16 *nCE = (u16 *) CONFIG_SYS_LATCH_ADDR; | |
29 | ||
30 | if (ctrl & NAND_CTRL_CHANGE) { | |
31 | ulong IO_ADDR_W = (ulong) this->IO_ADDR_W; | |
32 | ||
33 | IO_ADDR_W &= ~(SET_ALE | SET_CLE); | |
34 | ||
35 | if (ctrl & NAND_NCE) | |
36 | *nCE &= 0xFFFB; | |
37 | else | |
38 | *nCE |= 0x0004; | |
39 | ||
40 | if (ctrl & NAND_CLE) | |
41 | IO_ADDR_W |= SET_CLE; | |
42 | if (ctrl & NAND_ALE) | |
43 | IO_ADDR_W |= SET_ALE; | |
44 | ||
45 | this->IO_ADDR_W = (void *)IO_ADDR_W; | |
46 | } | |
47 | ||
48 | if (cmd != NAND_CMD_NONE) | |
49 | writeb(cmd, this->IO_ADDR_W); | |
50 | } | |
51 | ||
52 | int board_nand_init(struct nand_chip *nand) | |
53 | { | |
54 | gpio_t *gpio = (gpio_t *) MMAP_GPIO; | |
55 | ||
56 | /* | |
57 | * set up pin configuration - enabled 2nd output buffer's signals | |
58 | * (nand_ngpio - nCE USB1/2_PWR_EN, LATCH_GPIOs, LCD_VEEEN, etc) | |
59 | * to use nCE signal | |
60 | */ | |
61 | clrbits_8(&gpio->par_timer, GPIO_PAR_TIN3_TIN3); | |
62 | setbits_8(&gpio->pddr_timer, 0x08); | |
63 | setbits_8(&gpio->ppd_timer, 0x08); | |
64 | out_8(&gpio->pclrr_timer, 0); | |
65 | out_8(&gpio->podr_timer, 0); | |
66 | ||
67 | nand->chip_delay = 60; | |
68 | nand->ecc.mode = NAND_ECC_SOFT; | |
69 | nand->cmd_ctrl = nand_hwcontrol; | |
70 | ||
71 | return 0; | |
72 | } | |
73 | #endif |