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