LXR uboot/cmd/dtt.c

   1/*
   2 * (C) Copyright 2001
   3 * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
   4 *
   5 * SPDX-License-Identifier:     GPL-2.0+
   6 */
   7
   8#include <common.h>
   9#include <config.h>
  10#include <command.h>
  11
  12#include <dtt.h>
  13#include <i2c.h>
  14#include <tmu.h>
  15#include <linux/bug.h>
  16
  17#if defined CONFIG_DTT_SENSORS
  18static unsigned long sensor_initialized;
  19
  20static void _initialize_dtt(void)
  21{
  22        int i;
  23        unsigned char sensors[] = CONFIG_DTT_SENSORS;
  24
  25        for (i = 0; i < sizeof(sensors); i++) {
  26                if ((sensor_initialized & (1 << i)) == 0) {
  27                        if (dtt_init_one(sensors[i]) != 0) {
  28                                printf("DTT%d: Failed init!\n", i);
  29                                continue;
  30                        }
  31                        sensor_initialized |= (1 << i);
  32                }
  33        }
  34}
  35
  36void dtt_init(void)
  37{
  38        int old_bus;
  39
  40        /* switch to correct I2C bus */
  41        old_bus = I2C_GET_BUS();
  42        I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
  43
  44        _initialize_dtt();
  45
  46        /* switch back to original I2C bus */
  47        I2C_SET_BUS(old_bus);
  48}
  49#endif
  50
  51int dtt_i2c(void)
  52{
  53#if defined CONFIG_DTT_SENSORS
  54        int i;
  55        unsigned char sensors[] = CONFIG_DTT_SENSORS;
  56        int old_bus;
  57
  58        /* Force a compilation error, if there are more then 32 sensors */
  59        BUILD_BUG_ON(sizeof(sensors) > 32);
  60        /* switch to correct I2C bus */
  61#ifdef CONFIG_SYS_I2C
  62        old_bus = i2c_get_bus_num();
  63        i2c_set_bus_num(CONFIG_SYS_DTT_BUS_NUM);
  64#else
  65        old_bus = I2C_GET_BUS();
  66        I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
  67#endif
  68
  69        _initialize_dtt();
  70
  71        /*
  72         * Loop through sensors, read
  73         * temperature, and output it.
  74         */
  75        for (i = 0; i < sizeof(sensors); i++)
  76                printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
  77
  78        /* switch back to original I2C bus */
  79#ifdef CONFIG_SYS_I2C
  80        i2c_set_bus_num(old_bus);
  81#else
  82        I2C_SET_BUS(old_bus);
  83#endif
  84#endif
  85
  86        return 0;
  87}
  88
  89int dtt_tmu(void)
  90{
  91#if defined CONFIG_TMU_CMD_DTT
  92        int cur_temp;
  93
  94        /* Sense and return latest thermal info */
  95        if (tmu_monitor(&cur_temp) == TMU_STATUS_INIT) {
  96                puts("TMU is in unknown state, temperature is invalid\n");
  97                return -1;
  98        }
  99        printf("Current temperature: %u degrees Celsius\n", cur_temp);
 100#endif
 101        return 0;
 102}
 103
 104int do_dtt(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 105{
 106        int err = 0;
 107
 108        err |= dtt_i2c();
 109        err |= dtt_tmu();
 110
 111        return err;
 112}       /* do_dtt() */
 113
 114/***************************************************/
 115
 116U_BOOT_CMD(
 117          dtt,  1,      1,      do_dtt,
 118          "Read temperature from Digital Thermometer and Thermostat",
 119          ""
 120);
 121