board/freescale/m5329evb/nand.c

   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