src/hardware/asix-sigma/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2010-2012 Håvard Espeland <gus@ping.uio.no>,
   5  * Copyright (C) 2010 Martin Stensgård <mastensg@ping.uio.no>
   6  * Copyright (C) 2010 Carl Henrik Lunde <chlunde@ping.uio.no>
   7  *
   8  * This program is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (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, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 /*
  23  * ASIX SIGMA/SIGMA2 logic analyzer driver
  24  */
  25
  26 #include <config.h>
  27 #include "protocol.h"
  28
  29 /*
  30  * Channel numbers seem to go from 1-16, according to this image:
  31  * http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
  32  * (the cable has two additional GND pins, and a TI and TO pin)
  33  */
  34 static const char *channel_names[] = {
  35         "1", "2", "3", "4", "5", "6", "7", "8",
  36         "9", "10", "11", "12", "13", "14", "15", "16",
  37 };
  38
  39 static const uint32_t drvopts[] = {
  40         SR_CONF_LOGIC_ANALYZER,
  41 };
  42
  43 static const uint32_t devopts[] = {
  44         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  45         SR_CONF_LIMIT_SAMPLES | SR_CONF_GET | SR_CONF_SET,
  46         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  47 #if ASIX_SIGMA_WITH_TRIGGER
  48         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  49         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  50 #endif
  51 };
  52
  53 #if ASIX_SIGMA_WITH_TRIGGER
  54 static const int32_t trigger_matches[] = {
  55         SR_TRIGGER_ZERO,
  56         SR_TRIGGER_ONE,
  57         SR_TRIGGER_RISING,
  58         SR_TRIGGER_FALLING,
  59 };
  60 #endif
  61
  62 static void clear_helper(struct dev_context *devc)
  63 {
  64         ftdi_deinit(&devc->ftdic);
  65 }
  66
  67 static int dev_clear(const struct sr_dev_driver *di)
  68 {
  69         return std_dev_clear_with_callback(di, (std_dev_clear_callback)clear_helper);
  70 }
  71
  72 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  73 {
  74         struct sr_dev_inst *sdi;
  75         struct dev_context *devc;
  76         struct ftdi_device_list *devlist;
  77         char serial_txt[10];
  78         uint32_t serial;
  79         int ret;
  80         unsigned int i;
  81
  82         (void)options;
  83
  84         devc = g_malloc0(sizeof(struct dev_context));
  85
  86         ftdi_init(&devc->ftdic);
  87
  88         /* Look for SIGMAs. */
  89
  90         if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
  91             USB_VENDOR, USB_PRODUCT)) <= 0) {
  92                 if (ret < 0)
  93                         sr_err("ftdi_usb_find_all(): %d", ret);
  94                 goto free;
  95         }
  96
  97         /* Make sure it's a version 1 or 2 SIGMA. */
  98         ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
  99                              serial_txt, sizeof(serial_txt));
 100         sscanf(serial_txt, "%x", &serial);
 101
 102         if (serial < 0xa6010000 || serial > 0xa602ffff) {
 103                 sr_err("Only SIGMA and SIGMA2 are supported "
 104                        "in this version of libsigrok.");
 105                 goto free;
 106         }
 107
 108         sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);
 109
 110         devc->cur_samplerate = samplerates[0];
 111         devc->limit_msec = 0;
 112         devc->limit_samples = 0;
 113         devc->cur_firmware = -1;
 114         devc->num_channels = 0;
 115         devc->samples_per_event = 0;
 116         devc->capture_ratio = 50;
 117         devc->use_triggers = 0;
 118
 119         /* Register SIGMA device. */
 120         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 121         sdi->status = SR_ST_INITIALIZING;
 122         sdi->vendor = g_strdup(USB_VENDOR_NAME);
 123         sdi->model = g_strdup(USB_MODEL_NAME);
 124
 125         for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 126                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
 127
 128         sdi->priv = devc;
 129
 130         /* We will open the device again when we need it. */
 131         ftdi_list_free(&devlist);
 132
 133         return std_scan_complete(di, g_slist_append(NULL, sdi));
 134
 135 free:
 136         ftdi_deinit(&devc->ftdic);
 137         g_free(devc);
 138         return NULL;
 139 }
 140
 141 static int dev_open(struct sr_dev_inst *sdi)
 142 {
 143         struct dev_context *devc;
 144         int ret;
 145
 146         devc = sdi->priv;
 147
 148         if ((ret = ftdi_usb_open_desc(&devc->ftdic,
 149                         USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
 150                 sr_err("Failed to open device (%d): %s.",
 151                        ret, ftdi_get_error_string(&devc->ftdic));
 152                 return SR_ERR;
 153         }
 154
 155         return SR_OK;
 156 }
 157
 158 static int dev_close(struct sr_dev_inst *sdi)
 159 {
 160         struct dev_context *devc;
 161
 162         devc = sdi->priv;
 163
 164         return (ftdi_usb_close(&devc->ftdic) == 0) ? SR_OK : SR_ERR;
 165 }
 166
 167 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 168                 const struct sr_channel_group *cg)
 169 {
 170         struct dev_context *devc;
 171
 172         (void)cg;
 173
 174         if (!sdi)
 175                 return SR_ERR;
 176         devc = sdi->priv;
 177
 178         switch (key) {
 179         case SR_CONF_SAMPLERATE:
 180                 *data = g_variant_new_uint64(devc->cur_samplerate);
 181                 break;
 182         case SR_CONF_LIMIT_MSEC:
 183                 *data = g_variant_new_uint64(devc->limit_msec);
 184                 break;
 185         case SR_CONF_LIMIT_SAMPLES:
 186                 *data = g_variant_new_uint64(devc->limit_samples);
 187                 break;
 188 #if ASIX_SIGMA_WITH_TRIGGER
 189         case SR_CONF_CAPTURE_RATIO:
 190                 *data = g_variant_new_uint64(devc->capture_ratio);
 191                 break;
 192 #endif
 193         default:
 194                 return SR_ERR_NA;
 195         }
 196
 197         return SR_OK;
 198 }
 199
 200 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 201                 const struct sr_channel_group *cg)
 202 {
 203         struct dev_context *devc;
 204         uint64_t tmp;
 205         int ret;
 206
 207         (void)cg;
 208
 209         devc = sdi->priv;
 210
 211         ret = SR_OK;
 212         switch (key) {
 213         case SR_CONF_SAMPLERATE:
 214                 ret = sigma_set_samplerate(sdi, g_variant_get_uint64(data));
 215                 break;
 216         case SR_CONF_LIMIT_MSEC:
 217                 tmp = g_variant_get_uint64(data);
 218                 if (tmp > 0)
 219                         devc->limit_msec = g_variant_get_uint64(data);
 220                 else
 221                         ret = SR_ERR;
 222                 break;
 223         case SR_CONF_LIMIT_SAMPLES:
 224                 tmp = g_variant_get_uint64(data);
 225                 devc->limit_samples = tmp;
 226                 devc->limit_msec = sigma_limit_samples_to_msec(devc, tmp);
 227                 break;
 228 #if ASIX_SIGMA_WITH_TRIGGER
 229         case SR_CONF_CAPTURE_RATIO:
 230                 tmp = g_variant_get_uint64(data);
 231                 if (tmp > 100)
 232                         return SR_ERR;
 233                 devc->capture_ratio = tmp;
 234                 break;
 235 #endif
 236         default:
 237                 ret = SR_ERR_NA;
 238         }
 239
 240         return ret;
 241 }
 242
 243 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 244                 const struct sr_channel_group *cg)
 245 {
 246         GVariant *gvar;
 247         GVariantBuilder gvb;
 248
 249         switch (key) {
 250         case SR_CONF_DEVICE_OPTIONS:
 251                 return STD_CONFIG_LIST(key, data, sdi, cg, NULL, drvopts, devopts);
 252         case SR_CONF_SAMPLERATE:
 253                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 254                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 255                                 samplerates_count, sizeof(samplerates[0]));
 256                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 257                 *data = g_variant_builder_end(&gvb);
 258                 break;
 259 #if ASIX_SIGMA_WITH_TRIGGER
 260         case SR_CONF_TRIGGER_MATCH:
 261                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 262                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 263                                 sizeof(int32_t));
 264                 break;
 265 #endif
 266         default:
 267                 return SR_ERR_NA;
 268         }
 269
 270         return SR_OK;
 271 }
 272
 273 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 274 {
 275         struct dev_context *devc;
 276         struct clockselect_50 clockselect;
 277         int triggerpin, ret;
 278         uint8_t triggerselect;
 279         struct triggerinout triggerinout_conf;
 280         struct triggerlut lut;
 281         uint8_t regval;
 282         uint8_t clock_bytes[sizeof(clockselect)];
 283         size_t clock_idx;
 284
 285         devc = sdi->priv;
 286
 287         if (sigma_convert_trigger(sdi) != SR_OK) {
 288                 sr_err("Failed to configure triggers.");
 289                 return SR_ERR;
 290         }
 291
 292         /* If the samplerate has not been set, default to 200 kHz. */
 293         if (devc->cur_firmware == -1) {
 294                 if ((ret = sigma_set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
 295                         return ret;
 296         }
 297
 298         /* Enter trigger programming mode. */
 299         sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
 300
 301         triggerselect = 0;
 302         if (devc->cur_samplerate >= SR_MHZ(100)) {
 303                 /* 100 and 200 MHz mode. */
 304                 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
 305
 306                 /* Find which pin to trigger on from mask. */
 307                 for (triggerpin = 0; triggerpin < 8; triggerpin++)
 308                         if ((devc->trigger.risingmask | devc->trigger.fallingmask) &
 309                             (1 << triggerpin))
 310                                 break;
 311
 312                 /* Set trigger pin and light LED on trigger. */
 313                 triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7);
 314
 315                 /* Default rising edge. */
 316                 if (devc->trigger.fallingmask)
 317                         triggerselect |= 1 << 3;
 318
 319         } else if (devc->cur_samplerate <= SR_MHZ(50)) {
 320                 /* All other modes. */
 321                 sigma_build_basic_trigger(&lut, devc);
 322
 323                 sigma_write_trigger_lut(&lut, devc);
 324
 325                 triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0);
 326         }
 327
 328         /* Setup trigger in and out pins to default values. */
 329         memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
 330         triggerinout_conf.trgout_bytrigger = 1;
 331         triggerinout_conf.trgout_enable = 1;
 332
 333         sigma_write_register(WRITE_TRIGGER_OPTION,
 334                              (uint8_t *) &triggerinout_conf,
 335                              sizeof(struct triggerinout), devc);
 336
 337         /* Go back to normal mode. */
 338         sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
 339
 340         /* Set clock select register. */
 341         clockselect.async = 0;
 342         clockselect.fraction = 1 - 1;           /* Divider 1. */
 343         clockselect.disabled_channels = 0x0000; /* All channels enabled. */
 344         if (devc->cur_samplerate == SR_MHZ(200)) {
 345                 /* Enable 4 channels. */
 346                 clockselect.disabled_channels = 0xf0ff;
 347         } else if (devc->cur_samplerate == SR_MHZ(100)) {
 348                 /* Enable 8 channels. */
 349                 clockselect.disabled_channels = 0x00ff;
 350         } else {
 351                 /*
 352                  * 50 MHz mode, or fraction thereof. The 50MHz reference
 353                  * can get divided by any integer in the range 1 to 256.
 354                  * Divider minus 1 gets written to the hardware.
 355                  * (The driver lists a discrete set of sample rates, but
 356                  * all of them fit the above description.)
 357                  */
 358                 clockselect.fraction = SR_MHZ(50) / devc->cur_samplerate - 1;
 359         }
 360         clock_idx = 0;
 361         clock_bytes[clock_idx++] = clockselect.async;
 362         clock_bytes[clock_idx++] = clockselect.fraction;
 363         clock_bytes[clock_idx++] = clockselect.disabled_channels & 0xff;
 364         clock_bytes[clock_idx++] = clockselect.disabled_channels >> 8;
 365         sigma_write_register(WRITE_CLOCK_SELECT, clock_bytes, clock_idx, devc);
 366
 367         /* Setup maximum post trigger time. */
 368         sigma_set_register(WRITE_POST_TRIGGER,
 369                            (devc->capture_ratio * 255) / 100, devc);
 370
 371         /* Start acqusition. */
 372         devc->start_time = g_get_monotonic_time();
 373         regval =  WMR_TRGRES | WMR_SDRAMWRITEEN;
 374 #if ASIX_SIGMA_WITH_TRIGGER
 375         regval |= WMR_TRGEN;
 376 #endif
 377         sigma_set_register(WRITE_MODE, regval, devc);
 378
 379         std_session_send_df_header(sdi);
 380
 381         /* Add capture source. */
 382         sr_session_source_add(sdi->session, -1, 0, 10, sigma_receive_data, (void *)sdi);
 383
 384         devc->state.state = SIGMA_CAPTURE;
 385
 386         return SR_OK;
 387 }
 388
 389 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 390 {
 391         struct dev_context *devc;
 392
 393         devc = sdi->priv;
 394         devc->state.state = SIGMA_IDLE;
 395
 396         sr_session_source_remove(sdi->session, -1);
 397
 398         return SR_OK;
 399 }
 400
 401 static struct sr_dev_driver asix_sigma_driver_info = {
 402         .name = "asix-sigma",
 403         .longname = "ASIX SIGMA/SIGMA2",
 404         .api_version = 1,
 405         .init = std_init,
 406         .cleanup = std_cleanup,
 407         .scan = scan,
 408         .dev_list = std_dev_list,
 409         .dev_clear = dev_clear,
 410         .config_get = config_get,
 411         .config_set = config_set,
 412         .config_list = config_list,
 413         .dev_open = dev_open,
 414         .dev_close = dev_close,
 415         .dev_acquisition_start = dev_acquisition_start,
 416         .dev_acquisition_stop = dev_acquisition_stop,
 417         .context = NULL,
 418 };
 419 SR_REGISTER_DEV_DRIVER(asix_sigma_driver_info);