board/toradex/colibri_t20/colibri_t20.c

   1 /*
   2  *  Copyright (C) 2012 Lucas Stach
   3  *
   4  * SPDX-License-Identifier:     GPL-2.0+
   5  */
   6
   7 #include <common.h>
   8 #include <asm/arch/clock.h>
   9 #include <asm/arch/funcmux.h>
  10 #include <asm/arch/pinmux.h>
  11 #include <asm/arch-tegra/ap.h>
  12 #include <asm/arch-tegra/board.h>
  13 #include <asm/arch-tegra/tegra.h>
  14 #include <asm/gpio.h>
  15 #include <asm/io.h>
  16 #include <i2c.h>
  17
  18 #define PMU_I2C_ADDRESS         0x34
  19 #define MAX_I2C_RETRY           3
  20 #define PMU_SUPPLYENE           0x14
  21 #define PMU_SUPPLYENE_SYSINEN   (1<<5)
  22 #define PMU_SUPPLYENE_EXITSLREQ (1<<1)
  23
  24 int arch_misc_init(void)
  25 {
  26         /* Disable PMIC sleep mode on low supply voltage */
  27         struct udevice *dev;
  28         u8 addr, data[1];
  29         int err;
  30
  31         err = i2c_get_chip_for_busnum(0, PMU_I2C_ADDRESS, 1, &dev);
  32         if (err) {
  33                 debug("%s: Cannot find PMIC I2C chip\n", __func__);
  34                 return err;
  35         }
  36
  37         addr = PMU_SUPPLYENE;
  38
  39         err = dm_i2c_read(dev, addr, data, 1);
  40         if (err) {
  41                 debug("failed to get PMU_SUPPLYENE\n");
  42                 return err;
  43         }
  44
  45         data[0] &= ~PMU_SUPPLYENE_SYSINEN;
  46         data[0] |= PMU_SUPPLYENE_EXITSLREQ;
  47
  48         err = dm_i2c_write(dev, addr, data, 1);
  49         if (err) {
  50                 debug("failed to set PMU_SUPPLYENE\n");
  51                 return err;
  52         }
  53
  54         /* make sure SODIMM pin 87 nRESET_OUT is released properly */
  55         pinmux_set_func(PMUX_PINGRP_ATA, PMUX_FUNC_GMI);
  56
  57         if (readl(NV_PA_BASE_SRAM + NVBOOTINFOTABLE_BOOTTYPE) ==
  58             NVBOOTTYPE_RECOVERY)
  59                 printf("USB recovery mode\n");
  60
  61         return 0;
  62 }
  63
  64 #ifdef CONFIG_TEGRA_MMC
  65 /*
  66  * Routine: pin_mux_mmc
  67  * Description: setup the pin muxes/tristate values for the SDMMC(s)
  68  */
  69 void pin_mux_mmc(void)
  70 {
  71         funcmux_select(PERIPH_ID_SDMMC4, FUNCMUX_SDMMC4_ATB_GMA_4_BIT);
  72         pinmux_tristate_disable(PMUX_PINGRP_GMB);
  73 }
  74 #endif
  75
  76 #ifdef CONFIG_TEGRA_NAND
  77 void pin_mux_nand(void)
  78 {
  79         funcmux_select(PERIPH_ID_NDFLASH, FUNCMUX_NDFLASH_KBC_8_BIT);
  80
  81         /*
  82          * configure pingroup ATC to something unrelated to
  83          * avoid ATC overriding KBC
  84          */
  85         pinmux_set_func(PMUX_PINGRP_ATC, PMUX_FUNC_GMI);
  86 }
  87 #endif
  88
  89 #ifdef CONFIG_USB_EHCI_TEGRA
  90 void pin_mux_usb(void)
  91 {
  92         /* module internal USB bus to connect ethernet chipset */
  93         funcmux_select(PERIPH_ID_USB2, FUNCMUX_USB2_ULPI);
  94
  95         /* ULPI reference clock output */
  96         pinmux_set_func(PMUX_PINGRP_CDEV2, PMUX_FUNC_PLLP_OUT4);
  97         pinmux_tristate_disable(PMUX_PINGRP_CDEV2);
  98
  99         /* PHY reset GPIO */
 100         pinmux_tristate_disable(PMUX_PINGRP_UAC);
 101
 102         /* VBus GPIO */
 103         pinmux_tristate_disable(PMUX_PINGRP_DTE);
 104
 105         /* Reset ASIX using LAN_RESET */
 106         gpio_request(TEGRA_GPIO(V, 4), "LAN_RESET");
 107         gpio_direction_output(TEGRA_GPIO(V, 4), 0);
 108         pinmux_tristate_disable(PMUX_PINGRP_GPV);
 109         udelay(5);
 110         gpio_set_value(TEGRA_GPIO(V, 4), 1);
 111
 112         /* USBH_PEN: USB 1 aka Tegra USB port 3 VBus */
 113         pinmux_tristate_disable(PMUX_PINGRP_SPIG);
 114 }
 115 #endif
 116
 117 #ifdef CONFIG_VIDEO_TEGRA20
 118 /*
 119  * Routine: pin_mux_display
 120  * Description: setup the pin muxes/tristate values for the LCD interface)
 121  */
 122 void pin_mux_display(void)
 123 {
 124         /*
 125          * Manually untristate BL_ON (PT4 - SODIMM 71) as specified through
 126          * device-tree
 127          */
 128         pinmux_tristate_disable(PMUX_PINGRP_DTA);
 129
 130         pinmux_set_func(PMUX_PINGRP_SDC, PMUX_FUNC_PWM);
 131         pinmux_tristate_disable(PMUX_PINGRP_SDC);
 132 }
 133 #endif