post/sysmon.c

   1 /*
   2  * (C) Copyright 2003
   3  * Wolfgang Denk, DENX Software Engineering, wd@denx.de.
   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 <post.h>
  25 #include <common.h>
  26
  27 #ifdef CONFIG_POST
  28
  29 /*
  30  * SYSMON test
  31  *
  32  * This test performs the system hardware monitoring.
  33  * The test passes when all the following voltages and temperatures
  34  * are within allowed ranges:
  35  *
  36  * Board temperature
  37  * Front temperature
  38  * +3.3V CPU logic
  39  * +5V logic
  40  * +12V PCMCIA
  41  * +12V CCFL
  42  * +5V standby
  43  *
  44  * CCFL is not enabled if temperature values are not within allowed ranges
  45  *
  46  * See the list off all parameters in the sysmon_table below
  47  */
  48
  49 #include <post.h>
  50 #include <watchdog.h>
  51 #include <i2c.h>
  52
  53 #if CONFIG_POST & CFG_POST_SYSMON
  54
  55 static int sysmon_temp_invalid = 0;
  56
  57 /* #define DEBUG */
  58
  59 #define RELOC(x) if (x != NULL) x = (void *) ((ulong) (x) + gd->reloc_off)
  60
  61 typedef struct sysmon_s sysmon_t;
  62 typedef struct sysmon_table_s sysmon_table_t;
  63
  64 static void sysmon_lm87_init (sysmon_t * this);
  65 static void sysmon_pic_init (sysmon_t * this);
  66 static uint sysmon_i2c_read (sysmon_t * this, uint addr);
  67 static uint sysmon_i2c_read_sgn (sysmon_t * this, uint addr);
  68 static void sysmon_ccfl_disable (sysmon_table_t * this);
  69 static void sysmon_ccfl_enable (sysmon_table_t * this);
  70
  71 struct sysmon_s
  72 {
  73         uchar   chip;
  74         void    (*init)(sysmon_t *);
  75         uint    (*read)(sysmon_t *, uint);
  76 };
  77
  78 static sysmon_t sysmon_lm87 =
  79         {CFG_I2C_SYSMON_ADDR, sysmon_lm87_init, sysmon_i2c_read};
  80 static sysmon_t sysmon_lm87_sgn =
  81         {CFG_I2C_SYSMON_ADDR, sysmon_lm87_init, sysmon_i2c_read_sgn};
  82 static sysmon_t sysmon_pic =
  83         {CFG_I2C_PICIO_ADDR, sysmon_pic_init, sysmon_i2c_read};
  84
  85 static sysmon_t * sysmon_list[] =
  86 {
  87         &sysmon_lm87,
  88         &sysmon_lm87_sgn,
  89         &sysmon_pic,
  90         NULL
  91 };
  92
  93 struct sysmon_table_s
  94 {
  95         char *          name;
  96         char *          unit_name;
  97         sysmon_t *      sysmon;
  98         void            (*exec_before)(sysmon_table_t *);
  99         void            (*exec_after)(sysmon_table_t *);
 100
 101         int             unit_precision;
 102         int             unit_div;
 103         int             unit_min;
 104         int             unit_max;
 105         uint            val_mask;
 106         uint            val_min;
 107         uint            val_max;
 108         int             val_valid;
 109         uint            val_min_alt;
 110         uint            val_max_alt;
 111         int             val_valid_alt;
 112         uint            addr;
 113 };
 114
 115 static sysmon_table_t sysmon_table[] =
 116 {
 117     {"Board temperature", " C", &sysmon_lm87_sgn, NULL, sysmon_ccfl_disable,
 118      1, 1, -128, 127, 0xFF, 0x58, 0xD5, 0, 0x6C, 0xC6, 0, 0x27},
 119
 120     {"Front temperature", " C", &sysmon_lm87, NULL, sysmon_ccfl_disable,
 121      1, 100, -27316, 8984, 0xFF, 0xA4, 0xFC, 0, 0xB2, 0xF1, 0, 0x29},
 122
 123     {"+3.3V CPU logic", "V", &sysmon_lm87, NULL, NULL,
 124      100, 1000, 0, 4386, 0xFF, 0xB6, 0xC9, 0, 0xB6, 0xC9, 0, 0x22},
 125
 126     {"+ 5 V logic", "V", &sysmon_lm87, NULL, NULL,
 127      100, 1000, 0, 6630, 0xFF, 0xB6, 0xCA, 0, 0xB6, 0xCA, 0, 0x23},
 128
 129     {"+12 V PCMCIA", "V", &sysmon_lm87, NULL, NULL,
 130      100, 1000, 0, 15460, 0xFF, 0xBC, 0xD0, 0, 0xBC, 0xD0, 0, 0x21},
 131
 132     {"+12 V CCFL", "V", &sysmon_lm87, NULL, sysmon_ccfl_enable,
 133      100, 1000, 0, 15900, 0xFF, 0xB6, 0xCA, 0, 0xB6, 0xCA, 0, 0x24},
 134
 135     {"+ 5 V standby", "V", &sysmon_pic, NULL, NULL,
 136      100, 1000, 0, 6040, 0xFF, 0xC8, 0xDE, 0, 0xC8, 0xDE, 0, 0x7C},
 137 };
 138 static int sysmon_table_size = sizeof(sysmon_table) / sizeof(sysmon_table[0]);
 139
 140 static int conversion_done = 0;
 141
 142
 143 int sysmon_init_f (void)
 144 {
 145         sysmon_t ** l;
 146         ulong reg;
 147
 148         /* Power on CCFL, PCMCIA */
 149         reg = pic_read  (0x60);
 150         reg |= 0x09;
 151         pic_write (0x60, reg);
 152
 153         for (l = sysmon_list; *l; l++) {
 154                 (*l)->init(*l);
 155         }
 156
 157         return 0;
 158 }
 159
 160 void sysmon_reloc (void)
 161 {
 162         DECLARE_GLOBAL_DATA_PTR;
 163
 164         sysmon_t ** l;
 165         sysmon_table_t * t;
 166
 167         for (l = sysmon_list; *l; l++) {
 168                 RELOC(*l);
 169                 RELOC((*l)->init);
 170                 RELOC((*l)->read);
 171         }
 172
 173         for (t = sysmon_table; t < sysmon_table + sysmon_table_size; t ++) {
 174                 RELOC(t->exec_before);
 175                 RELOC(t->exec_after);
 176                 RELOC(t->sysmon);
 177         }
 178 }
 179
 180 static char *sysmon_unit_value (sysmon_table_t *s, uint val)
 181 {
 182         static char buf[32];
 183         int unit_val =
 184             s->unit_min + (s->unit_max - s->unit_min) * val / s->val_mask;
 185         char *p, sign;
 186         int dec, frac;
 187
 188         if (val == -1) {
 189                 return "I/O ERROR";
 190         }
 191
 192         if (unit_val < 0) {
 193                 sign = '-';
 194                 unit_val = -unit_val;
 195         } else {
 196                 sign = '+';
 197         }
 198
 199         p = buf + sprintf(buf, "%c%2d", sign, unit_val / s->unit_div);
 200
 201
 202         frac = unit_val % s->unit_div;
 203
 204         frac /= (s->unit_div / s->unit_precision);
 205
 206         dec = s->unit_precision;
 207
 208         if (dec != 1) {
 209                 *p++ = '.';
 210         }
 211         for (dec /= 10; dec != 0; dec /= 10) {
 212                 *p++ = '0' + (frac / dec) % 10;
 213         }
 214         strcpy(p, s->unit_name);
 215
 216         return buf;
 217 }
 218
 219 static void sysmon_lm87_init (sysmon_t * this)
 220 {
 221         uchar val;
 222
 223         /* Detect LM87 chip */
 224         if (i2c_read(this->chip, 0x40, 1, &val, 1) || (val & 0x80) != 0 ||
 225             i2c_read(this->chip, 0x3E, 1, &val, 1) || val != 0x02) {
 226                 printf("Error: LM87 not found at 0x%02X\n", this->chip);
 227                 return;
 228         }
 229
 230         /* Configure pins 5,6 as AIN */
 231         val = 0x03;
 232         if (i2c_write(this->chip, 0x16, 1, &val, 1)) {
 233                 printf("Error: can't write LM87 config register\n");
 234                 return;
 235         }
 236
 237         /* Start monitoring */
 238         val = 0x01;
 239         if (i2c_write(this->chip, 0x40, 1, &val, 1)) {
 240                 printf("Error: can't write LM87 config register\n");
 241                 return;
 242         }
 243 }
 244
 245 static void sysmon_pic_init (sysmon_t * this)
 246 {
 247 }
 248
 249 static uint sysmon_i2c_read (sysmon_t * this, uint addr)
 250 {
 251         uchar val;
 252         uint res = i2c_read(this->chip, addr, 1, &val, 1);
 253
 254         return res == 0 ? val : -1;
 255 }
 256
 257 static uint sysmon_i2c_read_sgn (sysmon_t * this, uint addr)
 258 {
 259         uchar val;
 260         return i2c_read(this->chip, addr, 1, &val, 1) == 0 ?
 261                 128 + (signed char)val : -1;
 262 }
 263
 264 static void sysmon_ccfl_disable (sysmon_table_t * this)
 265 {
 266         if (!this->val_valid_alt) {
 267                 sysmon_temp_invalid = 1;
 268         }
 269 }
 270
 271 static void sysmon_ccfl_enable (sysmon_table_t * this)
 272 {
 273         ulong reg;
 274
 275         if (!sysmon_temp_invalid) {
 276                 reg = pic_read  (0x60);
 277                 reg |= 0x06;
 278                 pic_write (0x60, reg);
 279         }
 280 }
 281
 282 int sysmon_post_test (int flags)
 283 {
 284         DECLARE_GLOBAL_DATA_PTR;
 285
 286         int res = 0;
 287         sysmon_table_t * t;
 288         uint val;
 289
 290         /*
 291          * The A/D conversion on the LM87 sensor takes 300 ms.
 292          */
 293         if (! conversion_done) {
 294                 while (post_time_ms(gd->post_init_f_time) < 300) WATCHDOG_RESET ();
 295                 conversion_done = 1;
 296         }
 297
 298         for (t = sysmon_table; t < sysmon_table + sysmon_table_size; t ++) {
 299                 if (t->exec_before) {
 300                         t->exec_before(t);
 301                 }
 302
 303                 val = t->sysmon->read(t->sysmon, t->addr);
 304                 if (val != -1) {
 305                         t->val_valid = val >= t->val_min && val <= t->val_max;
 306                         t->val_valid_alt = val >= t->val_min_alt && val <= t->val_max_alt;
 307                 } else {
 308                         t->val_valid = 0;
 309                         t->val_valid_alt = 0;
 310                 }
 311
 312                 if (t->exec_after) {
 313                         t->exec_after(t);
 314                 }
 315
 316                 if ((!t->val_valid) || (flags & POST_MANUAL)) {
 317                         printf("%-17s = %-10s ", t->name, sysmon_unit_value(t, val));
 318                         printf("allowed range");
 319                         printf(" %-8s ..", sysmon_unit_value(t, t->val_min));
 320                         printf(" %-8s", sysmon_unit_value(t, t->val_max));
 321                         printf("     %s\n", t->val_valid ? "OK" : "FAIL");
 322                 }
 323
 324                 if (!t->val_valid) {
 325                         res = -1;
 326                 }
 327         }
 328
 329         return res;
 330 }
 331
 332 #endif /* CONFIG_POST & CFG_POST_SYSMON */
 333 #endif /* CONFIG_POST */