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 SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
  30
  31 /*
  32  * Channel numbers seem to go from 1-16, according to this image:
  33  * http://tools.asix.net/img/sigma_sigmacab_pins_720.jpg
  34  * (the cable has two additional GND pins, and a TI and TO pin)
  35  */
  36 static const char *channel_names[] = {
  37         "1", "2", "3", "4", "5", "6", "7", "8",
  38         "9", "10", "11", "12", "13", "14", "15", "16",
  39 };
  40
  41 static const uint32_t drvopts[] = {
  42         SR_CONF_LOGIC_ANALYZER,
  43 };
  44
  45 static const uint32_t devopts[] = {
  46         SR_CONF_LIMIT_MSEC | SR_CONF_GET | SR_CONF_SET,
  47         SR_CONF_LIMIT_SAMPLES | SR_CONF_SET,
  48         SR_CONF_SAMPLERATE | SR_CONF_GET | SR_CONF_SET | SR_CONF_LIST,
  49         SR_CONF_TRIGGER_MATCH | SR_CONF_LIST,
  50         SR_CONF_CAPTURE_RATIO | SR_CONF_GET | SR_CONF_SET,
  51 };
  52
  53 static const int32_t trigger_matches[] = {
  54         SR_TRIGGER_ZERO,
  55         SR_TRIGGER_ONE,
  56         SR_TRIGGER_RISING,
  57         SR_TRIGGER_FALLING,
  58 };
  59
  60
  61 static int dev_clear(const struct sr_dev_driver *di)
  62 {
  63         return std_dev_clear(di, sigma_clear_helper);
  64 }
  65
  66 static int init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
  67 {
  68         return std_init(sr_ctx, di, LOG_PREFIX);
  69 }
  70
  71 static GSList *scan(struct sr_dev_driver *di, GSList *options)
  72 {
  73         struct sr_dev_inst *sdi;
  74         struct drv_context *drvc;
  75         struct dev_context *devc;
  76         GSList *devices;
  77         struct ftdi_device_list *devlist;
  78         char serial_txt[10];
  79         uint32_t serial;
  80         int ret;
  81         unsigned int i;
  82
  83         (void)options;
  84
  85         drvc = di->context;
  86
  87         devices = NULL;
  88
  89         devc = g_malloc0(sizeof(struct dev_context));
  90
  91         ftdi_init(&devc->ftdic);
  92
  93         /* Look for SIGMAs. */
  94
  95         if ((ret = ftdi_usb_find_all(&devc->ftdic, &devlist,
  96             USB_VENDOR, USB_PRODUCT)) <= 0) {
  97                 if (ret < 0)
  98                         sr_err("ftdi_usb_find_all(): %d", ret);
  99                 goto free;
 100         }
 101
 102         /* Make sure it's a version 1 or 2 SIGMA. */
 103         ftdi_usb_get_strings(&devc->ftdic, devlist->dev, NULL, 0, NULL, 0,
 104                              serial_txt, sizeof(serial_txt));
 105         sscanf(serial_txt, "%x", &serial);
 106
 107         if (serial < 0xa6010000 || serial > 0xa602ffff) {
 108                 sr_err("Only SIGMA and SIGMA2 are supported "
 109                        "in this version of libsigrok.");
 110                 goto free;
 111         }
 112
 113         sr_info("Found ASIX SIGMA - Serial: %s", serial_txt);
 114
 115         devc->cur_samplerate = samplerates[0];
 116         devc->period_ps = 0;
 117         devc->limit_msec = 0;
 118         devc->cur_firmware = -1;
 119         devc->num_channels = 0;
 120         devc->samples_per_event = 0;
 121         devc->capture_ratio = 50;
 122         devc->use_triggers = 0;
 123
 124         /* Register SIGMA device. */
 125         sdi = g_malloc0(sizeof(struct sr_dev_inst));
 126         sdi->status = SR_ST_INITIALIZING;
 127         sdi->vendor = g_strdup(USB_VENDOR_NAME);
 128         sdi->model = g_strdup(USB_MODEL_NAME);
 129         sdi->driver = di;
 130
 131         for (i = 0; i < ARRAY_SIZE(channel_names); i++)
 132                 sr_channel_new(sdi, i, SR_CHANNEL_LOGIC, TRUE, channel_names[i]);
 133
 134         devices = g_slist_append(devices, sdi);
 135         drvc->instances = g_slist_append(drvc->instances, sdi);
 136         sdi->priv = devc;
 137
 138         /* We will open the device again when we need it. */
 139         ftdi_list_free(&devlist);
 140
 141         return devices;
 142
 143 free:
 144         ftdi_deinit(&devc->ftdic);
 145         g_free(devc);
 146         return NULL;
 147 }
 148
 149 static GSList *dev_list(const struct sr_dev_driver *di)
 150 {
 151         return ((struct drv_context *)(di->context))->instances;
 152 }
 153
 154 static int dev_open(struct sr_dev_inst *sdi)
 155 {
 156         struct dev_context *devc;
 157         int ret;
 158
 159         devc = sdi->priv;
 160
 161         /* Make sure it's an ASIX SIGMA. */
 162         if ((ret = ftdi_usb_open_desc(&devc->ftdic,
 163                 USB_VENDOR, USB_PRODUCT, USB_DESCRIPTION, NULL)) < 0) {
 164
 165                 sr_err("ftdi_usb_open failed: %s",
 166                        ftdi_get_error_string(&devc->ftdic));
 167
 168                 return 0;
 169         }
 170
 171         sdi->status = SR_ST_ACTIVE;
 172
 173         return SR_OK;
 174 }
 175
 176 static int dev_close(struct sr_dev_inst *sdi)
 177 {
 178         struct dev_context *devc;
 179
 180         devc = sdi->priv;
 181
 182         /* TODO */
 183         if (sdi->status == SR_ST_ACTIVE)
 184                 ftdi_usb_close(&devc->ftdic);
 185
 186         sdi->status = SR_ST_INACTIVE;
 187
 188         return SR_OK;
 189 }
 190
 191 static int config_get(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 192                 const struct sr_channel_group *cg)
 193 {
 194         struct dev_context *devc;
 195
 196         (void)cg;
 197
 198         if (!sdi)
 199                 return SR_ERR;
 200         devc = sdi->priv;
 201
 202         switch (key) {
 203         case SR_CONF_SAMPLERATE:
 204                 *data = g_variant_new_uint64(devc->cur_samplerate);
 205                 break;
 206         case SR_CONF_LIMIT_MSEC:
 207                 *data = g_variant_new_uint64(devc->limit_msec);
 208                 break;
 209         case SR_CONF_CAPTURE_RATIO:
 210                 *data = g_variant_new_uint64(devc->capture_ratio);
 211                 break;
 212         default:
 213                 return SR_ERR_NA;
 214         }
 215
 216         return SR_OK;
 217 }
 218
 219 static int config_set(uint32_t key, GVariant *data, const struct sr_dev_inst *sdi,
 220                 const struct sr_channel_group *cg)
 221 {
 222         struct dev_context *devc;
 223         uint64_t tmp;
 224         int ret;
 225
 226         (void)cg;
 227
 228         if (sdi->status != SR_ST_ACTIVE)
 229                 return SR_ERR_DEV_CLOSED;
 230
 231         devc = sdi->priv;
 232
 233         ret = SR_OK;
 234         switch (key) {
 235         case SR_CONF_SAMPLERATE:
 236                 ret = sigma_set_samplerate(sdi, g_variant_get_uint64(data));
 237                 break;
 238         case SR_CONF_LIMIT_MSEC:
 239                 tmp = g_variant_get_uint64(data);
 240                 if (tmp > 0)
 241                         devc->limit_msec = g_variant_get_uint64(data);
 242                 else
 243                         ret = SR_ERR;
 244                 break;
 245         case SR_CONF_LIMIT_SAMPLES:
 246                 tmp = g_variant_get_uint64(data);
 247                 devc->limit_msec = tmp * 1000 / devc->cur_samplerate;
 248                 break;
 249         case SR_CONF_CAPTURE_RATIO:
 250                 tmp = g_variant_get_uint64(data);
 251                 if (tmp <= 100)
 252                         devc->capture_ratio = tmp;
 253                 else
 254                         ret = SR_ERR;
 255                 break;
 256         default:
 257                 ret = SR_ERR_NA;
 258         }
 259
 260         return ret;
 261 }
 262
 263 static int config_list(uint32_t key, GVariant **data, const struct sr_dev_inst *sdi,
 264                 const struct sr_channel_group *cg)
 265 {
 266         GVariant *gvar;
 267         GVariantBuilder gvb;
 268
 269         (void)cg;
 270
 271         switch (key) {
 272         case SR_CONF_DEVICE_OPTIONS:
 273                 if (!sdi)
 274                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 275                                         drvopts, ARRAY_SIZE(drvopts), sizeof(uint32_t));
 276                 else
 277                         *data = g_variant_new_fixed_array(G_VARIANT_TYPE_UINT32,
 278                                         devopts, ARRAY_SIZE(devopts), sizeof(uint32_t));
 279                 break;
 280         case SR_CONF_SAMPLERATE:
 281                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 282                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 283                                 SAMPLERATES_COUNT, sizeof(uint64_t));
 284                 g_variant_builder_add(&gvb, "{sv}", "samplerates", gvar);
 285                 *data = g_variant_builder_end(&gvb);
 286                 break;
 287         case SR_CONF_TRIGGER_MATCH:
 288                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 289                                 trigger_matches, ARRAY_SIZE(trigger_matches),
 290                                 sizeof(int32_t));
 291                 break;
 292         default:
 293                 return SR_ERR_NA;
 294         }
 295
 296         return SR_OK;
 297 }
 298
 299 static int dev_acquisition_start(const struct sr_dev_inst *sdi)
 300 {
 301         struct dev_context *devc;
 302         struct clockselect_50 clockselect;
 303         int frac, triggerpin, ret;
 304         uint8_t triggerselect = 0;
 305         struct triggerinout triggerinout_conf;
 306         struct triggerlut lut;
 307
 308         if (sdi->status != SR_ST_ACTIVE)
 309                 return SR_ERR_DEV_CLOSED;
 310
 311         devc = sdi->priv;
 312
 313         if (sigma_convert_trigger(sdi) != SR_OK) {
 314                 sr_err("Failed to configure triggers.");
 315                 return SR_ERR;
 316         }
 317
 318         /* If the samplerate has not been set, default to 200 kHz. */
 319         if (devc->cur_firmware == -1) {
 320                 if ((ret = sigma_set_samplerate(sdi, SR_KHZ(200))) != SR_OK)
 321                         return ret;
 322         }
 323
 324         /* Enter trigger programming mode. */
 325         sigma_set_register(WRITE_TRIGGER_SELECT1, 0x20, devc);
 326
 327         /* 100 and 200 MHz mode. */
 328         if (devc->cur_samplerate >= SR_MHZ(100)) {
 329                 sigma_set_register(WRITE_TRIGGER_SELECT1, 0x81, devc);
 330
 331                 /* Find which pin to trigger on from mask. */
 332                 for (triggerpin = 0; triggerpin < 8; triggerpin++)
 333                         if ((devc->trigger.risingmask | devc->trigger.fallingmask) &
 334                             (1 << triggerpin))
 335                                 break;
 336
 337                 /* Set trigger pin and light LED on trigger. */
 338                 triggerselect = (1 << LEDSEL1) | (triggerpin & 0x7);
 339
 340                 /* Default rising edge. */
 341                 if (devc->trigger.fallingmask)
 342                         triggerselect |= 1 << 3;
 343
 344         /* All other modes. */
 345         } else if (devc->cur_samplerate <= SR_MHZ(50)) {
 346                 sigma_build_basic_trigger(&lut, devc);
 347
 348                 sigma_write_trigger_lut(&lut, devc);
 349
 350                 triggerselect = (1 << LEDSEL1) | (1 << LEDSEL0);
 351         }
 352
 353         /* Setup trigger in and out pins to default values. */
 354         memset(&triggerinout_conf, 0, sizeof(struct triggerinout));
 355         triggerinout_conf.trgout_bytrigger = 1;
 356         triggerinout_conf.trgout_enable = 1;
 357
 358         sigma_write_register(WRITE_TRIGGER_OPTION,
 359                              (uint8_t *) &triggerinout_conf,
 360                              sizeof(struct triggerinout), devc);
 361
 362         /* Go back to normal mode. */
 363         sigma_set_register(WRITE_TRIGGER_SELECT1, triggerselect, devc);
 364
 365         /* Set clock select register. */
 366         if (devc->cur_samplerate == SR_MHZ(200))
 367                 /* Enable 4 channels. */
 368                 sigma_set_register(WRITE_CLOCK_SELECT, 0xf0, devc);
 369         else if (devc->cur_samplerate == SR_MHZ(100))
 370                 /* Enable 8 channels. */
 371                 sigma_set_register(WRITE_CLOCK_SELECT, 0x00, devc);
 372         else {
 373                 /*
 374                  * 50 MHz mode (or fraction thereof). Any fraction down to
 375                  * 50 MHz / 256 can be used, but is not supported by sigrok API.
 376                  */
 377                 frac = SR_MHZ(50) / devc->cur_samplerate - 1;
 378
 379                 clockselect.async = 0;
 380                 clockselect.fraction = frac;
 381                 clockselect.disabled_channels = 0;
 382
 383                 sigma_write_register(WRITE_CLOCK_SELECT,
 384                                      (uint8_t *) &clockselect,
 385                                      sizeof(clockselect), devc);
 386         }
 387
 388         /* Setup maximum post trigger time. */
 389         sigma_set_register(WRITE_POST_TRIGGER,
 390                            (devc->capture_ratio * 255) / 100, devc);
 391
 392         /* Start acqusition. */
 393         gettimeofday(&devc->start_tv, 0);
 394         sigma_set_register(WRITE_MODE, 0x0d, devc);
 395
 396         std_session_send_df_header(sdi, LOG_PREFIX);
 397
 398         /* Add capture source. */
 399         sr_session_source_add(sdi->session, -1, 0, 10, sigma_receive_data, (void *)sdi);
 400
 401         devc->state.state = SIGMA_CAPTURE;
 402
 403         return SR_OK;
 404 }
 405
 406 static int dev_acquisition_stop(struct sr_dev_inst *sdi)
 407 {
 408         struct dev_context *devc;
 409
 410         devc = sdi->priv;
 411         devc->state.state = SIGMA_IDLE;
 412
 413         sr_session_source_remove(sdi->session, -1);
 414
 415         return SR_OK;
 416 }
 417
 418 SR_PRIV struct sr_dev_driver asix_sigma_driver_info = {
 419         .name = "asix-sigma",
 420         .longname = "ASIX SIGMA/SIGMA2",
 421         .api_version = 1,
 422         .init = init,
 423         .cleanup = std_cleanup,
 424         .scan = scan,
 425         .dev_list = dev_list,
 426         .dev_clear = dev_clear,
 427         .config_get = config_get,
 428         .config_set = config_set,
 429         .config_list = config_list,
 430         .dev_open = dev_open,
 431         .dev_close = dev_close,
 432         .dev_acquisition_start = dev_acquisition_start,
 433         .dev_acquisition_stop = dev_acquisition_stop,
 434         .context = NULL,
 435 };