post/board/lwmon5/sysmon.c

   1 /*
   2  * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
   3  *
   4  * Developed for DENX Software Engineering GmbH
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation; either version 2 of
  12  * the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <post.h>
  26 #include <common.h>
  27
  28 /*
  29  * SYSMON test
  30  *
  31  * This test performs the system hardware monitoring.
  32  * The test passes when all the following voltages and temperatures
  33  * are within allowed ranges:
  34  *
  35  * Temperature            -40 .. +90 C
  36  * +5V                  +4.50 .. +5.50 V
  37  * +5V standby          +3.50 .. +5.50 V
  38  *
  39  * LCD backlight is not enabled if temperature values are not within
  40  * allowed ranges (-30 .. + 80). The brightness of backlite can be
  41  * controlled by setting "brightness" enviroment variable. Default value is 50%
  42  *
  43  * See the list of all parameters in the sysmon_table below
  44  */
  45
  46 #include <post.h>
  47 #include <watchdog.h>
  48 #include <i2c.h>
  49
  50 #if defined(CONFIG_VIDEO)
  51 #include <mb862xx.h>
  52 #endif
  53
  54 #if CONFIG_POST & CONFIG_SYS_POST_SYSMON
  55
  56 DECLARE_GLOBAL_DATA_PTR;
  57
  58 /* from dspic.c */
  59 extern int dspic_read(ushort reg);
  60
  61 #define RELOC(x) if (x != NULL) x = (void *) ((ulong) (x) + gd->reloc_off)
  62
  63 #define REG_TEMPERATURE                 0x12BC
  64 #define REG_VOLTAGE_5V                  0x12CA
  65 #define REG_VOLTAGE_5V_STANDBY          0x12C6
  66
  67 #define TEMPERATURE_MIN                 (-40)   /* degr. C */
  68 #define TEMPERATURE_MAX                 (+90)   /* degr. C */
  69 #define TEMPERATURE_DISPLAY_MIN         (-35)   /* degr. C */
  70 #define TEMPERATURE_DISPLAY_MAX         (+85)   /* degr. C */
  71
  72 #define VOLTAGE_5V_MIN                  (+4500) /* mV */
  73 #define VOLTAGE_5V_MAX                  (+5500) /* mV */
  74
  75 #define VOLTAGE_5V_STANDBY_MIN          (+3500) /* mV */
  76 #define VOLTAGE_5V_STANDBY_MAX          (+5500) /* mV */
  77
  78 typedef struct sysmon_s sysmon_t;
  79 typedef struct sysmon_table_s sysmon_table_t;
  80
  81 static void sysmon_dspic_init (sysmon_t * this);
  82 static int sysmon_dspic_read (sysmon_t * this, uint addr);
  83 static void sysmon_backlight_disable (sysmon_table_t * this);
  84
  85 struct sysmon_s
  86 {
  87         uchar   chip;
  88         void    (*init)(sysmon_t *);
  89         int     (*read)(sysmon_t *, uint);
  90 };
  91
  92 static sysmon_t sysmon_dspic =
  93         {CONFIG_SYS_I2C_DSPIC_IO_ADDR, sysmon_dspic_init, sysmon_dspic_read};
  94
  95 static sysmon_t * sysmon_list[] =
  96 {
  97         &sysmon_dspic,
  98         NULL
  99 };
 100
 101 struct sysmon_table_s
 102 {
 103         char *          name;
 104         char *          unit_name;
 105         sysmon_t *      sysmon;
 106         void            (*exec_before)(sysmon_table_t *);
 107         void            (*exec_after)(sysmon_table_t *);
 108
 109         int             unit_precision;
 110         int             unit_div;
 111         int             unit_min;
 112         int             unit_max;
 113         uint            val_mask;
 114         uint            val_min;
 115         uint            val_max;
 116         int             val_valid;
 117         uint            val_min_alt;
 118         uint            val_max_alt;
 119         int             val_valid_alt;
 120         uint            addr;
 121 };
 122
 123 static sysmon_table_t sysmon_table[] =
 124 {
 125         {
 126         "Temperature", " C", &sysmon_dspic, NULL, sysmon_backlight_disable,
 127         1, 1, -32768, 32767, 0xFFFF,
 128         0x8000 + TEMPERATURE_MIN,         0x8000 + TEMPERATURE_MAX,         0,
 129         0x8000 + TEMPERATURE_DISPLAY_MIN, 0x8000 + TEMPERATURE_DISPLAY_MAX, 0,
 130         REG_TEMPERATURE,
 131         },
 132
 133         {
 134         "+ 5 V", "V", &sysmon_dspic, NULL, NULL,
 135         100, 1000, -0x8000, 0x7FFF, 0xFFFF,
 136         0x8000 + VOLTAGE_5V_MIN, 0x8000 + VOLTAGE_5V_MAX, 0,
 137         0x8000 + VOLTAGE_5V_MIN, 0x8000 + VOLTAGE_5V_MAX, 0,
 138         REG_VOLTAGE_5V,
 139         },
 140
 141         {
 142         "+ 5 V standby", "V", &sysmon_dspic, NULL, NULL,
 143         100, 1000, -0x8000, 0x7FFF, 0xFFFF,
 144         0x8000 + VOLTAGE_5V_STANDBY_MIN, 0x8000 + VOLTAGE_5V_STANDBY_MAX, 0,
 145         0x8000 + VOLTAGE_5V_STANDBY_MIN, 0x8000 + VOLTAGE_5V_STANDBY_MAX, 0,
 146         REG_VOLTAGE_5V_STANDBY,
 147         },
 148 };
 149 static int sysmon_table_size = sizeof(sysmon_table) / sizeof(sysmon_table[0]);
 150
 151 int sysmon_init_f (void)
 152 {
 153         sysmon_t ** l;
 154
 155         for (l = sysmon_list; *l; l++)
 156                 (*l)->init(*l);
 157
 158         return 0;
 159 }
 160
 161 void sysmon_reloc (void)
 162 {
 163         sysmon_t ** l;
 164         sysmon_table_t * t;
 165
 166         for (l = sysmon_list; *l; l++) {
 167                 RELOC(*l);
 168                 RELOC((*l)->init);
 169                 RELOC((*l)->read);
 170         }
 171
 172         for (t = sysmon_table; t < sysmon_table + sysmon_table_size; t ++) {
 173                 RELOC(t->exec_before);
 174                 RELOC(t->exec_after);
 175                 RELOC(t->sysmon);
 176         }
 177 }
 178
 179 static char *sysmon_unit_value (sysmon_table_t *s, uint val)
 180 {
 181         static char buf[32];
 182         char *p, sign;
 183         int decimal, frac;
 184         int unit_val;
 185
 186         unit_val = s->unit_min + (s->unit_max - s->unit_min) * val / s->val_mask;
 187
 188         if (val == -1)
 189                 return "I/O ERROR";
 190
 191         if (unit_val < 0) {
 192                 sign = '-';
 193                 unit_val = -unit_val;
 194         } else
 195                 sign = '+';
 196
 197         p = buf + sprintf(buf, "%c%2d", sign, unit_val / s->unit_div);
 198
 199
 200         frac = unit_val % s->unit_div;
 201
 202         frac /= (s->unit_div / s->unit_precision);
 203
 204         decimal = s->unit_precision;
 205
 206         if (decimal != 1)
 207                 *p++ = '.';
 208         for (decimal /= 10; decimal != 0; decimal /= 10)
 209                 *p++ = '0' + (frac / decimal) % 10;
 210         strcpy(p, s->unit_name);
 211
 212         return buf;
 213 }
 214
 215 static void sysmon_dspic_init (sysmon_t * this)
 216 {
 217 }
 218
 219 static int sysmon_dspic_read (sysmon_t * this, uint addr)
 220 {
 221         int res = dspic_read(addr);
 222
 223         /* To fit into the table range we should add 0x8000 */
 224         return (res == -1) ? -1 : (res + 0x8000);
 225 }
 226
 227 static void sysmon_backlight_disable (sysmon_table_t * this)
 228 {
 229 #if defined(CONFIG_VIDEO)
 230         board_backlight_switch(this->val_valid_alt);
 231 #endif
 232 }
 233
 234 int sysmon_post_test (int flags)
 235 {
 236         int res = 0;
 237         sysmon_table_t * t;
 238         int val;
 239
 240         for (t = sysmon_table; t < sysmon_table + sysmon_table_size; t ++) {
 241                 if (t->exec_before)
 242                         t->exec_before(t);
 243
 244                 val = t->sysmon->read(t->sysmon, t->addr);
 245                 if (val != -1) {
 246                         t->val_valid = val >= t->val_min && val <= t->val_max;
 247                         t->val_valid_alt = val >= t->val_min_alt && val <= t->val_max_alt;
 248                 } else {
 249                         t->val_valid = 0;
 250                         t->val_valid_alt = 0;
 251                 }
 252
 253                 if (t->exec_after)
 254                         t->exec_after(t);
 255
 256                 if ((!t->val_valid) || (flags & POST_MANUAL)) {
 257                         printf("%-17s = %-10s ", t->name, sysmon_unit_value(t, val));
 258                         printf("allowed range");
 259                         printf(" %-8s ..", sysmon_unit_value(t, t->val_min));
 260                         printf(" %-8s", sysmon_unit_value(t, t->val_max));
 261                         printf("     %s\n", t->val_valid ? "OK" : "FAIL");
 262                 }
 263
 264                 if (!t->val_valid)
 265                         res = 1;
 266         }
 267
 268         return res;
 269 }
 270 #endif /* CONFIG_POST & CONFIG_SYS_POST_SYSMON */