1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  * (C) Copyright 2013
4  * Avionic Design GmbH <www.avionic-design.de>
5  */
6 
7 #include <common.h>
8 #include <dm.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(TEGRA_GPIO(V, 2), "ALIVE");
45 	gpio_direction_output(TEGRA_GPIO(V, 2), 1);
46 
47 	/* Remove the reset on the external periph */
48 	gpio_request(TEGRA_GPIO(I, 4), "nRST_PERIPH");
49 	gpio_direction_output(TEGRA_GPIO(I, 4), 1);
50 }
51 
52 void pmu_write(uchar reg, uchar data)
53 {
54 	struct udevice *dev;
55 	int ret;
56 
57 	ret = i2c_get_chip_for_busnum(4, PMU_I2C_ADDRESS, 1, &dev);
58 	if (ret) {
59 		debug("%s: Cannot find PMIC I2C chip\n", __func__);
60 		return;
61 	}
62 	dm_i2c_write(dev, reg, &data, 1);
63 }
64 
65 /*
66  * Do I2C/PMU writes to bring up SD card bus power
67  *
68  */
69 void board_sdmmc_voltage_init(void)
70 {
71 	/* Enable LDO5 with 3.3v for SDMMC3 */
72 	pmu_write(PMU_REG_LDO5, PMU_LDO5(HIGH_POWER, 3300));
73 
74 	/* Switch the power on */
75 	gpio_request(TEGRA_GPIO(J, 2), "EN_3V3_EMMC");
76 	gpio_direction_output(TEGRA_GPIO(J, 2), 1);
77 }
78 
79 /*
80  * Routine: pin_mux_mmc
81  * Description: setup the MMC muxes, power rails, etc.
82  */
83 void pin_mux_mmc(void)
84 {
85 	/*
86 	 * NOTE: We don't do mmc-specific pin muxes here.
87 	 * They were done globally in pinmux_init().
88 	 */
89 
90 	/* Bring up the SDIO1 power rail */
91 	board_sdmmc_voltage_init();
92 }
93