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Alban Bedel8f380382013-11-14 10:58:30 +01001/*
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>
Simon Glassb0e6ef42014-12-10 08:55:57 -07009#include <dm.h>
Alban Bedel8f380382013-11-14 10:58:30 +010010#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
30void pinmux_init(void)
31{
Stephen Warrendfb42fc2014-03-21 12:28:56 -060032 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));
Alban Bedel8f380382013-11-14 10:58:30 +010036
37 /* Initialize any non-default pad configs (APB_MISC_GP regs) */
Stephen Warrendfb42fc2014-03-21 12:28:56 -060038 pinmux_config_drvgrp_table(tamonten_ng_padctrl,
39 ARRAY_SIZE(tamonten_ng_padctrl));
Alban Bedel8f380382013-11-14 10:58:30 +010040}
41
42void 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
53void pmu_write(uchar reg, uchar data)
54{
Simon Glassb0e6ef42014-12-10 08:55:57 -070055 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 }
Simon Glassf9a4c2d2015-01-12 18:02:07 -070063 dm_i2c_write(dev, reg, &data, 1);
Alban Bedel8f380382013-11-14 10:58:30 +010064}
65
66/*
67 * Do I2C/PMU writes to bring up SD card bus power
68 *
69 */
70void 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 */
84void 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}