board/phytec/phycore_rk3288/phycore-rk3288.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2017 PHYTEC Messtechnik GmbH
   4  * Author: Wadim Egorov <w.egorov@phytec.de>
   5  */
   6
   7 #include <asm/io.h>
   8 #include <common.h>
   9 #include <dm.h>
  10 #include <environment.h>
  11 #include <fdtdec.h>
  12 #include <i2c.h>
  13 #include <i2c_eeprom.h>
  14 #include <netdev.h>
  15 #include "som.h"
  16 #include <power/regulator.h>
  17 #include <power/rk8xx_pmic.h>
  18
  19 static int valid_rk3288_som(struct rk3288_som *som)
  20 {
  21         unsigned char *p = (unsigned char *)som;
  22         unsigned char *e = p + sizeof(struct rk3288_som) - 1;
  23         int hw = 0;
  24
  25         while (p < e) {
  26                 hw += hweight8(*p);
  27                 p++;
  28         }
  29
  30         return hw == som->bs;
  31 }
  32
  33 int rk3288_board_late_init(void)
  34 {
  35         int ret;
  36         struct udevice *dev;
  37         struct rk3288_som opt;
  38         int off;
  39
  40         /* Get the identificatioin page of M24C32-D EEPROM */
  41         off = fdt_path_offset(gd->fdt_blob, "eeprom0");
  42         if (off < 0) {
  43                 printf("%s: No eeprom0 path offset\n", __func__);
  44                 return off;
  45         }
  46
  47         ret = uclass_get_device_by_of_offset(UCLASS_I2C_EEPROM, off, &dev);
  48         if (ret) {
  49                 printf("%s: Could not find EEPROM\n", __func__);
  50                 return ret;
  51         }
  52
  53         ret = i2c_set_chip_offset_len(dev, 2);
  54         if (ret)
  55                 return ret;
  56
  57         ret = i2c_eeprom_read(dev, 0, (uint8_t *)&opt,
  58                                 sizeof(struct rk3288_som));
  59         if (ret) {
  60                 printf("%s: Could not read EEPROM\n", __func__);
  61                 return ret;
  62         }
  63
  64         if (opt.api_version != 0 || !valid_rk3288_som(&opt)) {
  65                 printf("Invalid data or wrong EEPROM layout version.\n");
  66                 /* Proceed anyway, since there is no fallback option */
  67         }
  68
  69         if (is_valid_ethaddr(opt.mac))
  70                 eth_env_set_enetaddr("ethaddr", opt.mac);
  71
  72         return 0;
  73 }
  74
  75 #ifdef CONFIG_SPL_BUILD
  76 #if !defined(CONFIG_SPL_OF_PLATDATA)
  77 static int phycore_init(void)
  78 {
  79         struct udevice *pmic;
  80         int ret;
  81
  82         ret = uclass_first_device_err(UCLASS_PMIC, &pmic);
  83         if (ret)
  84                 return ret;
  85
  86 #if defined(CONFIG_SPL_POWER_SUPPORT)
  87         /* Increase USB input current to 2A */
  88         ret = rk818_spl_configure_usb_input_current(pmic, 2000);
  89         if (ret)
  90                 return ret;
  91
  92         /* Close charger when USB lower then 3.26V */
  93         ret = rk818_spl_configure_usb_chrg_shutdown(pmic, 3260000);
  94         if (ret)
  95                 return ret;
  96 #endif
  97
  98         return 0;
  99 }
 100 #endif
 101
 102 void spl_board_init(void)
 103 {
 104 #if !defined(CONFIG_SPL_OF_PLATDATA)
 105         int ret;
 106
 107         if (of_machine_is_compatible("phytec,rk3288-phycore-som")) {
 108                 ret = phycore_init();
 109                 if (ret) {
 110                         debug("Failed to set up phycore power settings: %d\n",
 111                               ret);
 112                         return;
 113                 }
 114         }
 115 #endif
 116 }
 117 #endif