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 }
86