board/avionic-design/common/tamonten-ng.c

   1 /*
   2  * (C) Copyright 2013
   3  * Avionic Design GmbH <www.avionic-design.de>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <asm/arch/pinmux.h>
  11 #include <asm/arch/gp_padctrl.h>
  12 #include <asm/arch/gpio.h>
  13 #include <asm/gpio.h>
  14 #include "pinmux-config-tamonten-ng.h"
  15 #include <i2c.h>
  16
  17 #define PMU_I2C_ADDRESS         0x2D
  18
  19 #define PMU_REG_LDO5            0x32
  20
  21 #define PMU_REG_LDO_HIGH_POWER  1
  22
  23 /* Voltage selection for the LDOs with 100mV resolution */
  24 #define PMU_REG_LDO_SEL_100(mV) ((((mV - 1000) / 100) + 2) << 2)
  25
  26 #define PMU_REG_LDO_100(st, mV) (PMU_REG_LDO_##st | PMU_REG_LDO_SEL_100(mV))
  27
  28 #define PMU_LDO5(st, mV)        PMU_REG_LDO_100(st, mV)
  29
  30 void pinmux_init(void)
  31 {
  32         pinmux_config_pingrp_table(tamonten_ng_pinmux_common,
  33                 ARRAY_SIZE(tamonten_ng_pinmux_common));
  34         pinmux_config_pingrp_table(unused_pins_lowpower,
  35                 ARRAY_SIZE(unused_pins_lowpower));
  36
  37         /* Initialize any non-default pad configs (APB_MISC_GP regs) */
  38         pinmux_config_drvgrp_table(tamonten_ng_padctrl,
  39                 ARRAY_SIZE(tamonten_ng_padctrl));
  40 }
  41
  42 void gpio_early_init(void)
  43 {
  44         /* Turn on the alive signal */
  45         gpio_request(GPIO_PV2, "ALIVE");
  46         gpio_direction_output(GPIO_PV2, 1);
  47
  48         /* Remove the reset on the external periph */
  49         gpio_request(GPIO_PI4, "nRST_PERIPH");
  50         gpio_direction_output(GPIO_PI4, 1);
  51 }
  52
  53 void pmu_write(uchar reg, uchar data)
  54 {
  55         struct udevice *dev;
  56         int ret;
  57
  58         ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, &dev);
  59         if (ret) {
  60                 debug("%s: Cannot find PMIC I2C chip\n", __func__);
  61                 return;
  62         }
  63         i2c_write(dev, reg, &data, 1);
  64 }
  65
  66 /*
  67  * Do I2C/PMU writes to bring up SD card bus power
  68  *
  69  */
  70 void board_sdmmc_voltage_init(void)
  71 {
  72         /* Enable LDO5 with 3.3v for SDMMC3 */
  73         pmu_write(PMU_REG_LDO5, PMU_LDO5(HIGH_POWER, 3300));
  74
  75         /* Switch the power on */
  76         gpio_request(GPIO_PJ2, "EN_3V3_EMMC");
  77         gpio_direction_output(GPIO_PJ2, 1);
  78 }
  79
  80 /*
  81  * Routine: pin_mux_mmc
  82  * Description: setup the MMC muxes, power rails, etc.
  83  */
  84 void pin_mux_mmc(void)
  85 {
  86         /*
  87          * NOTE: We don't do mmc-specific pin muxes here.
  88          * They were done globally in pinmux_init().
  89          */
  90
  91         /* Bring up the SDIO1 power rail */
  92         board_sdmmc_voltage_init();
  93 }