board/freescale/mx23evk/mx23evk.c

   1 /*
   2  * Freescale MX23EVK board
   3  *
   4  * (C) Copyright 2013 O.S. Systems Software LTDA.
   5  *
   6  * Author: Otavio Salvador <otavio@ossystems.com.br>
   7  *
   8  * Based on m28evk.c:
   9  * Copyright (C) 2011 Marek Vasut <marek.vasut@gmail.com>
  10  * on behalf of DENX Software Engineering GmbH
  11  *
  12  * See file CREDITS for list of people who contributed to this
  13  * project.
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License as
  17  * published by the Free Software Foundation; either version 2 of
  18  * the License, or (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  */
  25
  26 #include <common.h>
  27 #include <asm/gpio.h>
  28 #include <asm/arch/imx-regs.h>
  29 #include <asm/arch/clock.h>
  30 #include <asm/arch/iomux-mx23.h>
  31 #include <asm/arch/sys_proto.h>
  32
  33 DECLARE_GLOBAL_DATA_PTR;
  34
  35 /*
  36  * Functions
  37  */
  38 int board_early_init_f(void)
  39 {
  40         /* IO0 clock at 480MHz */
  41         mxs_set_ioclk(MXC_IOCLK0, 480000);
  42
  43         /* SSP0 clock at 96MHz */
  44         mxs_set_sspclk(MXC_SSPCLK0, 96000, 0);
  45
  46         /* Power on LCD */
  47         gpio_direction_output(MX23_PAD_LCD_RESET__GPIO_1_18, 1);
  48
  49         /* Set contrast to maximum */
  50         gpio_direction_output(MX23_PAD_PWM2__GPIO_1_28, 1);
  51
  52         return 0;
  53 }
  54
  55 int dram_init(void)
  56 {
  57         return mxs_dram_init();
  58 }
  59
  60 int board_init(void)
  61 {
  62         /* Adress of boot parameters */
  63         gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
  64
  65         return 0;
  66 }
  67
  68 #ifdef  CONFIG_CMD_MMC
  69 static int mx23evk_mmc_wp(int id)
  70 {
  71         if (id != 0) {
  72                 printf("MXS MMC: Invalid card selected (card id = %d)\n", id);
  73                 return 1;
  74         }
  75
  76         return gpio_get_value(MX23_PAD_PWM4__GPIO_1_30);
  77 }
  78
  79 int board_mmc_init(bd_t *bis)
  80 {
  81         /* Configure WP as input */
  82         gpio_direction_input(MX23_PAD_PWM4__GPIO_1_30);
  83
  84         /* Configure MMC0 Power Enable */
  85         gpio_direction_output(MX23_PAD_PWM3__GPIO_1_29, 0);
  86
  87         return mxsmmc_initialize(bis, 0, mx23evk_mmc_wp, NULL);
  88 }
  89 #endif