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  * SPDX-License-Identifier:     GPL-2.0+
  13  */
  14
  15 #include <common.h>
  16 #include <asm/gpio.h>
  17 #include <asm/arch/imx-regs.h>
  18 #include <asm/arch/clock.h>
  19 #include <asm/arch/iomux-mx23.h>
  20 #include <asm/arch/sys_proto.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 /*
  25  * Functions
  26  */
  27 int board_early_init_f(void)
  28 {
  29         /* IO0 clock at 480MHz */
  30         mxs_set_ioclk(MXC_IOCLK0, 480000);
  31
  32         /* SSP0 clock at 96MHz */
  33         mxs_set_sspclk(MXC_SSPCLK0, 96000, 0);
  34
  35         /* Power on LCD */
  36         gpio_direction_output(MX23_PAD_LCD_RESET__GPIO_1_18, 1);
  37
  38         /* Set contrast to maximum */
  39         gpio_direction_output(MX23_PAD_PWM2__GPIO_1_28, 1);
  40
  41         return 0;
  42 }
  43
  44 int dram_init(void)
  45 {
  46         return mxs_dram_init();
  47 }
  48
  49 int board_init(void)
  50 {
  51         /* Adress of boot parameters */
  52         gd->bd->bi_boot_params = PHYS_SDRAM_1 + 0x100;
  53
  54         return 0;
  55 }
  56
  57 #ifdef  CONFIG_CMD_MMC
  58 static int mx23evk_mmc_wp(int id)
  59 {
  60         if (id != 0) {
  61                 printf("MXS MMC: Invalid card selected (card id = %d)\n", id);
  62                 return 1;
  63         }
  64
  65         return gpio_get_value(MX23_PAD_PWM4__GPIO_1_30);
  66 }
  67
  68 int board_mmc_init(bd_t *bis)
  69 {
  70         /* Configure WP as input */
  71         gpio_direction_input(MX23_PAD_PWM4__GPIO_1_30);
  72
  73         /* Configure MMC0 Power Enable */
  74         gpio_direction_output(MX23_PAD_PWM3__GPIO_1_29, 0);
  75
  76         return mxsmmc_initialize(bis, 0, mx23evk_mmc_wp, NULL);
  77 }
  78 #endif