common/cmd_dtt.c

   1 /*
   2  * (C) Copyright 2001
   3  * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #include <common.h>
  25 #include <config.h>
  26 #include <command.h>
  27
  28 #include <dtt.h>
  29 #include <i2c.h>
  30 #include <tmu.h>
  31
  32 #if defined CONFIG_DTT_SENSORS
  33 static unsigned long sensor_initialized;
  34
  35 static void _initialize_dtt(void)
  36 {
  37         int i;
  38         unsigned char sensors[] = CONFIG_DTT_SENSORS;
  39
  40         for (i = 0; i < sizeof(sensors); i++) {
  41                 if ((sensor_initialized & (1 << i)) == 0) {
  42                         if (dtt_init_one(sensors[i]) != 0) {
  43                                 printf("DTT%d: Failed init!\n", i);
  44                                 continue;
  45                         }
  46                         sensor_initialized |= (1 << i);
  47                 }
  48         }
  49 }
  50
  51 void dtt_init(void)
  52 {
  53         int old_bus;
  54
  55         /* switch to correct I2C bus */
  56         old_bus = I2C_GET_BUS();
  57         I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
  58
  59         _initialize_dtt();
  60
  61         /* switch back to original I2C bus */
  62         I2C_SET_BUS(old_bus);
  63 }
  64 #endif
  65
  66 int dtt_i2c(void)
  67 {
  68 #if defined CONFIG_DTT_SENSORS
  69         int i;
  70         unsigned char sensors[] = CONFIG_DTT_SENSORS;
  71         int old_bus;
  72
  73         /* Force a compilation error, if there are more then 32 sensors */
  74         BUILD_BUG_ON(sizeof(sensors) > 32);
  75         /* switch to correct I2C bus */
  76         old_bus = I2C_GET_BUS();
  77         I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
  78
  79         _initialize_dtt();
  80
  81         /*
  82          * Loop through sensors, read
  83          * temperature, and output it.
  84          */
  85         for (i = 0; i < sizeof(sensors); i++)
  86                 printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
  87
  88         /* switch back to original I2C bus */
  89         I2C_SET_BUS(old_bus);
  90 #endif
  91
  92         return 0;
  93 }
  94
  95 int dtt_tmu(void)
  96 {
  97 #if defined CONFIG_TMU_CMD_DTT
  98         int cur_temp;
  99
 100         /* Sense and return latest thermal info */
 101         if (tmu_monitor(&cur_temp) == TMU_STATUS_INIT) {
 102                 puts("TMU is in unknown state, temperature is invalid\n");
 103                 return -1;
 104         }
 105         printf("Current temperature: %u degrees Celsius\n", cur_temp);
 106 #endif
 107         return 0;
 108 }
 109
 110 int do_dtt(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
 111 {
 112         int err = 0;
 113
 114         err |= dtt_i2c();
 115         err |= dtt_tmu();
 116
 117         return err;
 118 }       /* do_dtt() */
 119
 120 /***************************************************/
 121
 122 U_BOOT_CMD(
 123           dtt,  1,      1,      do_dtt,
 124           "Read temperature from Digital Thermometer and Thermostat",
 125           ""
 126 );