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  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <post.h>
  10 #include <common.h>
  11
  12 /*
  13  * SYSMON test
  14  *
  15  * This test performs the system hardware monitoring.
  16  * The test passes when all the following voltages and temperatures
  17  * are within allowed ranges:
  18  *
  19  * Temperature            -40 .. +90 C
  20  * +5V                  +4.50 .. +5.50 V
  21  * +5V standby          +3.50 .. +5.50 V
  22  *
  23  * LCD backlight is not enabled if temperature values are not within
  24  * allowed ranges (-30 .. + 80). The brightness of backlite can be
  25  * controlled by setting "brightness" enviroment variable. Default value is 50%
  26  *
  27  * See the list of all parameters in the sysmon_table below
  28  */
  29
  30 #include <post.h>
  31 #include <watchdog.h>
  32 #include <i2c.h>
  33
  34 #if defined(CONFIG_VIDEO)
  35 #include <mb862xx.h>
  36 #endif
  37
  38 #if CONFIG_POST & CONFIG_SYS_POST_SYSMON
  39
  40 DECLARE_GLOBAL_DATA_PTR;
  41
  42 /* from dspic.c */
  43 extern int dspic_read(ushort reg, ushort *data);
  44
  45 #define REG_TEMPERATURE                 0x12BC
  46 #define REG_VOLTAGE_5V                  0x12CA
  47 #define REG_VOLTAGE_5V_STANDBY          0x12C6
  48
  49 #define TEMPERATURE_MIN                 (-40)   /* degr. C */
  50 #define TEMPERATURE_MAX                 (+90)   /* degr. C */
  51 #define TEMPERATURE_DISPLAY_MIN         (-35)   /* degr. C */
  52 #define TEMPERATURE_DISPLAY_MAX         (+85)   /* degr. C */
  53
  54 #define VOLTAGE_5V_MIN                  (+4500) /* mV */
  55 #define VOLTAGE_5V_MAX                  (+5500) /* mV */
  56
  57 #define VOLTAGE_5V_STANDBY_MIN          (+3500) /* mV */
  58 #define VOLTAGE_5V_STANDBY_MAX          (+5500) /* mV */
  59
  60 typedef struct sysmon_s sysmon_t;
  61 typedef struct sysmon_table_s sysmon_table_t;
  62
  63 static void sysmon_dspic_init(sysmon_t *this);
  64 static int sysmon_dspic_read(sysmon_t *this, uint addr, int *val);
  65 static int sysmon_dspic_read_sgn(sysmon_t *this, uint addr,  int *val);
  66 static void sysmon_backlight_disable(sysmon_table_t *this);
  67
  68 struct sysmon_s {
  69         uchar   chip;
  70         void    (*init)(sysmon_t *);
  71         int     (*read)(sysmon_t *, uint, int *);
  72 };
  73
  74 static sysmon_t sysmon_dspic = {
  75         CONFIG_SYS_I2C_DSPIC_IO_ADDR,
  76         sysmon_dspic_init,
  77         sysmon_dspic_read
  78 };
  79
  80 static sysmon_t sysmon_dspic_sgn = {
  81         CONFIG_SYS_I2C_DSPIC_IO_ADDR,
  82         sysmon_dspic_init,
  83         sysmon_dspic_read_sgn
  84 };
  85
  86 static sysmon_t *sysmon_list[] = {
  87         &sysmon_dspic,
  88         NULL
  89 };
  90
  91 struct sysmon_table_s {
  92         char            *name;
  93         char            *unit_name;
  94         sysmon_t        *sysmon;
  95         void            (*exec_before)(sysmon_table_t *);
  96         void            (*exec_after)(sysmon_table_t *);
  97
  98         int             unit_precision;
  99         int             unit_div;
 100         int             unit_min;
 101         int             unit_max;
 102         uint            val_mask;
 103         uint            val_min;
 104         uint            val_max;
 105         int             val_valid;
 106         uint            val_min_alt;
 107         uint            val_max_alt;
 108         int             val_valid_alt;
 109         uint            addr;
 110 };
 111
 112 static sysmon_table_t sysmon_table[] = {
 113         {
 114                 "Temperature", " C", &sysmon_dspic, NULL, sysmon_backlight_disable,
 115                 1, 1, -32768, 32767, 0xFFFF,
 116                 0x8000 + TEMPERATURE_MIN,         0x8000 + TEMPERATURE_MAX,         0,
 117                 0x8000 + TEMPERATURE_DISPLAY_MIN, 0x8000 + TEMPERATURE_DISPLAY_MAX, 0,
 118                 REG_TEMPERATURE,
 119         },
 120
 121         {
 122                 "+ 5 V", "V", &sysmon_dspic, NULL, NULL,
 123                 100, 1000, -0x8000, 0x7FFF, 0xFFFF,
 124                 0x8000 + VOLTAGE_5V_MIN, 0x8000 + VOLTAGE_5V_MAX, 0,
 125                 0x8000 + VOLTAGE_5V_MIN, 0x8000 + VOLTAGE_5V_MAX, 0,
 126                 REG_VOLTAGE_5V,
 127         },
 128
 129         {
 130                 "+ 5 V standby", "V", &sysmon_dspic, NULL, NULL,
 131                 100, 1000, -0x8000, 0x7FFF, 0xFFFF,
 132                 0x8000 + VOLTAGE_5V_STANDBY_MIN, 0x8000 + VOLTAGE_5V_STANDBY_MAX, 0,
 133                 0x8000 + VOLTAGE_5V_STANDBY_MIN, 0x8000 + VOLTAGE_5V_STANDBY_MAX, 0,
 134                 REG_VOLTAGE_5V_STANDBY,
 135         },
 136
 137         {
 138                 "Temperature", "°C", &sysmon_dspic_sgn, NULL, sysmon_backlight_disable,
 139                 1, 1, -32768, 32767, 0xFFFF,
 140                 0x8000 + TEMPERATURE_MIN,         0x8000 + TEMPERATURE_MAX,         0,
 141                 0x8000 + TEMPERATURE_DISPLAY_MIN, 0x8000 + TEMPERATURE_DISPLAY_MAX, 0,
 142                 REG_TEMPERATURE,
 143         },
 144 };
 145
 146 int sysmon_init_f(void)
 147 {
 148         sysmon_t **l;
 149
 150         for (l = sysmon_list; *l; l++)
 151                 (*l)->init(*l);
 152
 153         return 0;
 154 }
 155
 156 void sysmon_reloc(void)
 157 {
 158         /* Do nothing for now, sysmon_reloc() is required by the sysmon post */
 159 }
 160
 161 static char *sysmon_unit_value(sysmon_table_t *s, uint val)
 162 {
 163         static char buf[32];
 164         char *p, sign;
 165         int decimal, frac;
 166         int unit_val;
 167
 168         unit_val = s->unit_min + (s->unit_max - s->unit_min) * val / s->val_mask;
 169
 170         if (val == -1)
 171                 return "I/O ERROR";
 172
 173         if (unit_val < 0) {
 174                 sign = '-';
 175                 unit_val = -unit_val;
 176         } else {
 177                 sign = '+';
 178         }
 179
 180         p = buf + sprintf(buf, "%c%2d", sign, unit_val / s->unit_div);
 181
 182         frac = unit_val % s->unit_div;
 183         frac /= (s->unit_div / s->unit_precision);
 184
 185         decimal = s->unit_precision;
 186
 187         if (decimal != 1)
 188                 *p++ = '.';
 189         for (decimal /= 10; decimal != 0; decimal /= 10)
 190                 *p++ = '0' + (frac / decimal) % 10;
 191         strcpy(p, s->unit_name);
 192
 193         return buf;
 194 }
 195
 196 static void sysmon_dspic_init(sysmon_t *this)
 197 {
 198 }
 199
 200 static int sysmon_dspic_read(sysmon_t *this, uint addr, int *val)
 201 {
 202         ushort data;
 203
 204         if (dspic_read(addr, &data) == 0){
 205                 /* To fit into the table range we should add 0x8000 */
 206                 *val = data + 0x8000;
 207                 return 0;
 208         }
 209
 210         return -1;
 211 }
 212
 213 static int sysmon_dspic_read_sgn(sysmon_t *this, uint addr, int *val)
 214 {
 215         ushort data;
 216
 217         if (dspic_read(addr, &data) == 0){
 218                 /* To fit into the table range we should add 0x8000 */
 219                 *val = (signed short)data + 0x8000;
 220                 return 0;
 221         }
 222
 223         return -1;
 224 }
 225
 226 static void sysmon_backlight_disable(sysmon_table_t *this)
 227 {
 228 #if defined(CONFIG_VIDEO)
 229         board_backlight_switch(this->val_valid_alt);
 230 #endif
 231 }
 232
 233 int sysmon_post_test(int flags)
 234 {
 235         int res = 0;
 236         sysmon_table_t * t;
 237         int val;
 238
 239         for (t = sysmon_table; t < sysmon_table + ARRAY_SIZE(sysmon_table); t++) {
 240                 t->val_valid = 1;
 241                 if (t->exec_before)
 242                         t->exec_before(t);
 243
 244                 if (t->sysmon->read(t->sysmon, t->addr, &val) != 0) {
 245                         t->val_valid = 0;
 246                         t->val_valid_alt = 0;
 247                         post_log(": read failed\n");
 248                         res = 1;
 249                         break;
 250                 }
 251
 252                 if (t->val_valid != 0) {
 253                         t->val_valid = val >= t->val_min && val <= t->val_max;
 254                         t->val_valid_alt = val >= t->val_min_alt && val <= t->val_max_alt;
 255                 }
 256
 257                 if (t->exec_after)
 258                         t->exec_after(t);
 259
 260                 if ((!t->val_valid) || (flags)) {
 261                         post_log("\n\t%-17s = %-10s ", t->name, sysmon_unit_value(t, val));
 262                         post_log("allowed range");
 263                         post_log(" %-8s ..", sysmon_unit_value(t, t->val_min));
 264                         post_log(" %-8s", sysmon_unit_value(t, t->val_max));
 265                         post_log("     %s", t->val_valid ? "OK" : "FAIL");
 266                 }
 267
 268                 if (!t->val_valid) {
 269                         res = 1;
 270                         break;
 271                 }
 272         }
 273         post_log("\n");
 274
 275         return res;
 276 }
 277 #endif /* CONFIG_POST & CONFIG_SYS_POST_SYSMON */