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
pinmux_init(void)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
gpio_early_init(void)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
pmu_write(uchar reg,uchar data)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 */
board_sdmmc_voltage_init(void)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 */
pin_mux_mmc(void)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