board/warp/warp.c

   1 /*
   2  * Copyright (C) 2014, 2015 O.S. Systems Software LTDA.
   3  * Copyright (C) 2014 Kynetics LLC.
   4  * Copyright (C) 2014 Revolution Robotics, Inc.
   5  *
   6  * Author: Otavio Salvador <otavio@ossystems.com.br>
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <asm/arch/clock.h>
  12 #include <asm/arch/iomux.h>
  13 #include <asm/arch/imx-regs.h>
  14 #include <asm/arch/mx6-pins.h>
  15 #include <asm/arch/sys_proto.h>
  16 #include <asm/gpio.h>
  17 #include <asm/imx-common/iomux-v3.h>
  18 #include <asm/io.h>
  19 #include <linux/sizes.h>
  20 #include <common.h>
  21 #include <watchdog.h>
  22 #include <fsl_esdhc.h>
  23 #include <mmc.h>
  24
  25 DECLARE_GLOBAL_DATA_PTR;
  26
  27 #define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | \
  28         PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
  29         PAD_CTL_SRE_FAST  | PAD_CTL_HYS | \
  30         PAD_CTL_LVE)
  31
  32 #define USDHC_PAD_CTRL (PAD_CTL_PUS_22K_UP | \
  33         PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm | \
  34         PAD_CTL_SRE_FAST  | PAD_CTL_HYS | \
  35         PAD_CTL_LVE)
  36
  37 int dram_init(void)
  38 {
  39         gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
  40
  41         return 0;
  42 }
  43
  44 static void setup_iomux_uart(void)
  45 {
  46         static iomux_v3_cfg_t const uart1_pads[] = {
  47                 MX6_PAD_UART1_TXD__UART1_TXD | MUX_PAD_CTRL(UART_PAD_CTRL),
  48                 MX6_PAD_UART1_RXD__UART1_RXD | MUX_PAD_CTRL(UART_PAD_CTRL),
  49         };
  50
  51         imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
  52 }
  53
  54 static struct fsl_esdhc_cfg usdhc_cfg[1] = {
  55         {USDHC2_BASE_ADDR},
  56 };
  57
  58 int board_mmc_getcd(struct mmc *mmc)
  59 {
  60         return 1;       /* Assume boot SD always present */
  61 }
  62
  63 int board_mmc_init(bd_t *bis)
  64 {
  65         static iomux_v3_cfg_t const usdhc2_pads[] = {
  66                 MX6_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  67                 MX6_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  68                 MX6_PAD_SD2_RST__USDHC2_RST | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  69                 MX6_PAD_SD2_DAT0__USDHC2_DAT0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  70                 MX6_PAD_SD2_DAT1__USDHC2_DAT1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  71                 MX6_PAD_SD2_DAT2__USDHC2_DAT2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  72                 MX6_PAD_SD2_DAT3__USDHC2_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  73                 MX6_PAD_SD2_DAT4__USDHC2_DAT4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  74                 MX6_PAD_SD2_DAT5__USDHC2_DAT5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  75                 MX6_PAD_SD2_DAT6__USDHC2_DAT6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  76                 MX6_PAD_SD2_DAT7__USDHC2_DAT7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  77         };
  78
  79         imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
  80
  81         usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
  82         return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
  83 }
  84
  85 int board_early_init_f(void)
  86 {
  87         setup_iomux_uart();
  88         return 0;
  89 }
  90
  91 int board_init(void)
  92 {
  93         /* address of boot parameters */
  94         gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
  95
  96         return 0;
  97 }
  98
  99 int board_late_init(void)
 100 {
 101 #ifdef CONFIG_HW_WATCHDOG
 102         hw_watchdog_init();
 103 #endif
 104
 105         return 0;
 106 }
 107
 108 int checkboard(void)
 109 {
 110         puts("Board: WaRP Board\n");
 111
 112         return 0;
 113 }