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 #include <usb.h>
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 #define UART_PAD_CTRL (PAD_CTL_PUS_100K_UP | \
  29         PAD_CTL_SPEED_MED | PAD_CTL_DSE_40ohm | \
  30         PAD_CTL_SRE_FAST  | PAD_CTL_HYS | \
  31         PAD_CTL_LVE)
  32
  33 #define USDHC_PAD_CTRL (PAD_CTL_PUS_22K_UP | \
  34         PAD_CTL_SPEED_LOW | PAD_CTL_DSE_80ohm | \
  35         PAD_CTL_SRE_FAST  | PAD_CTL_HYS | \
  36         PAD_CTL_LVE)
  37
  38 int dram_init(void)
  39 {
  40         gd->ram_size = get_ram_size((void *)PHYS_SDRAM, PHYS_SDRAM_SIZE);
  41
  42         return 0;
  43 }
  44
  45 static void setup_iomux_uart(void)
  46 {
  47         static iomux_v3_cfg_t const uart1_pads[] = {
  48                 MX6_PAD_UART1_TXD__UART1_TXD | MUX_PAD_CTRL(UART_PAD_CTRL),
  49                 MX6_PAD_UART1_RXD__UART1_RXD | MUX_PAD_CTRL(UART_PAD_CTRL),
  50         };
  51
  52         imx_iomux_v3_setup_multiple_pads(uart1_pads, ARRAY_SIZE(uart1_pads));
  53 }
  54
  55 static struct fsl_esdhc_cfg usdhc_cfg[1] = {
  56         {USDHC2_BASE_ADDR},
  57 };
  58
  59 int board_mmc_getcd(struct mmc *mmc)
  60 {
  61         return 1;       /* Assume boot SD always present */
  62 }
  63
  64 int board_mmc_init(bd_t *bis)
  65 {
  66         static iomux_v3_cfg_t const usdhc2_pads[] = {
  67                 MX6_PAD_SD2_CLK__USDHC2_CLK | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  68                 MX6_PAD_SD2_CMD__USDHC2_CMD | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  69                 MX6_PAD_SD2_RST__USDHC2_RST | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  70                 MX6_PAD_SD2_DAT0__USDHC2_DAT0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  71                 MX6_PAD_SD2_DAT1__USDHC2_DAT1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  72                 MX6_PAD_SD2_DAT2__USDHC2_DAT2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  73                 MX6_PAD_SD2_DAT3__USDHC2_DAT3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  74                 MX6_PAD_SD2_DAT4__USDHC2_DAT4 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  75                 MX6_PAD_SD2_DAT5__USDHC2_DAT5 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  76                 MX6_PAD_SD2_DAT6__USDHC2_DAT6 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  77                 MX6_PAD_SD2_DAT7__USDHC2_DAT7 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
  78         };
  79
  80         imx_iomux_v3_setup_multiple_pads(usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
  81
  82         usdhc_cfg[0].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
  83         return fsl_esdhc_initialize(bis, &usdhc_cfg[0]);
  84 }
  85
  86 int board_usb_phy_mode(int port)
  87 {
  88         return USB_INIT_DEVICE;
  89 }
  90
  91 int board_early_init_f(void)
  92 {
  93         setup_iomux_uart();
  94         return 0;
  95 }
  96
  97 int board_init(void)
  98 {
  99         /* address of boot parameters */
 100         gd->bd->bi_boot_params = PHYS_SDRAM + 0x100;
 101
 102         return 0;
 103 }
 104
 105 int board_late_init(void)
 106 {
 107 #ifdef CONFIG_HW_WATCHDOG
 108         hw_watchdog_init();
 109 #endif
 110
 111         return 0;
 112 }
 113
 114 int checkboard(void)
 115 {
 116         puts("Board: WaRP Board\n");
 117
 118         return 0;
 119 }