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(TEGRA_GPIO(V, 2), "ALIVE");
46 	gpio_direction_output(TEGRA_GPIO(V, 2), 1);
47 
48 	/* Remove the reset on the external periph */
49 	gpio_request(TEGRA_GPIO(I, 4), "nRST_PERIPH");
50 	gpio_direction_output(TEGRA_GPIO(I, 4), 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, 1, &dev);
59 	if (ret) {
60 		debug("%s: Cannot find PMIC I2C chip\n", __func__);
61 		return;
62 	}
63 	dm_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(TEGRA_GPIO(J, 2), "EN_3V3_EMMC");
77 	gpio_direction_output(TEGRA_GPIO(J, 2), 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 }
94