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 <asm/arch/pinmux.h>
  10 #include <asm/arch/gp_padctrl.h>
  11 #include <asm/arch/gpio.h>
  12 #include <asm/gpio.h>
  13 #include "pinmux-config-tamonten-ng.h"
  14 #include <i2c.h>
  15
  16 #define PMU_I2C_ADDRESS         0x2D
  17
  18 #define PMU_REG_LDO5            0x32
  19
  20 #define PMU_REG_LDO_HIGH_POWER  1
  21
  22 /* Voltage selection for the LDOs with 100mV resolution */
  23 #define PMU_REG_LDO_SEL_100(mV) ((((mV - 1000) / 100) + 2) << 2)
  24
  25 #define PMU_REG_LDO_100(st, mV) (PMU_REG_LDO_##st | PMU_REG_LDO_SEL_100(mV))
  26
  27 #define PMU_LDO5(st, mV)        PMU_REG_LDO_100(st, mV)
  28
  29 void pinmux_init(void)
  30 {
  31         pinmux_config_pingrp_table(tamonten_ng_pinmux_common,
  32                 ARRAY_SIZE(tamonten_ng_pinmux_common));
  33         pinmux_config_pingrp_table(unused_pins_lowpower,
  34                 ARRAY_SIZE(unused_pins_lowpower));
  35
  36         /* Initialize any non-default pad configs (APB_MISC_GP regs) */
  37         pinmux_config_drvgrp_table(tamonten_ng_padctrl,
  38                 ARRAY_SIZE(tamonten_ng_padctrl));
  39 }
  40
  41 void gpio_early_init(void)
  42 {
  43         /* Turn on the alive signal */
  44         gpio_request(GPIO_PV2, "ALIVE");
  45         gpio_direction_output(GPIO_PV2, 1);
  46
  47         /* Remove the reset on the external periph */
  48         gpio_request(GPIO_PI4, "nRST_PERIPH");
  49         gpio_direction_output(GPIO_PI4, 1);
  50 }
  51
  52 void pmu_write(uchar reg, uchar data)
  53 {
  54         i2c_set_bus_num(4);     /* PMU is on bus 4 */
  55         i2c_write(PMU_I2C_ADDRESS, reg, 1, &data, 1);
  56 }
  57
  58 /*
  59  * Do I2C/PMU writes to bring up SD card bus power
  60  *
  61  */
  62 void board_sdmmc_voltage_init(void)
  63 {
  64         /* Enable LDO5 with 3.3v for SDMMC3 */
  65         pmu_write(PMU_REG_LDO5, PMU_LDO5(HIGH_POWER, 3300));
  66
  67         /* Switch the power on */
  68         gpio_request(GPIO_PJ2, "EN_3V3_EMMC");
  69         gpio_direction_output(GPIO_PJ2, 1);
  70 }
  71
  72 /*
  73  * Routine: pin_mux_mmc
  74  * Description: setup the MMC muxes, power rails, etc.
  75  */
  76 void pin_mux_mmc(void)
  77 {
  78         /*
  79          * NOTE: We don't do mmc-specific pin muxes here.
  80          * They were done globally in pinmux_init().
  81          */
  82
  83         /* Bring up the SDIO1 power rail */
  84         board_sdmmc_voltage_init();
  85 }