hardware/link-mso19/api.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2011 Daniel Ribeiro <drwyrm@gmail.com>
   5  * Copyright (C) 2012 Renato Caldas <rmsc@fe.up.pt>
   6  * Copyright (C) 2013 Lior Elazary <lelazary@yahoo.com>
   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 #include "protocol.h"
  23
  24 static const int32_t hwcaps[] = {
  25         SR_CONF_OSCILLOSCOPE,
  26         SR_CONF_LOGIC_ANALYZER,
  27         SR_CONF_SAMPLERATE,
  28         SR_CONF_TRIGGER_SLOPE,
  29         SR_CONF_HORIZ_TRIGGERPOS,
  30 //      SR_CONF_CAPTURE_RATIO,
  31         SR_CONF_LIMIT_SAMPLES,
  32 //      SR_CONF_RLE,
  33 };
  34
  35 /*
  36  * Channels are numbered 0 to 7.
  37  *
  38  * See also: http://www.linkinstruments.com/images/mso19_1113.gif
  39  */
  40 SR_PRIV const char *mso19_channel_names[NUM_PROBES + 1] = {
  41         /* Note: DSO needs to be first. */
  42         "DSO", "0", "1", "2", "3", "4", "5", "6", "7", NULL,
  43 };
  44
  45 static const uint64_t samplerates[] = {
  46         SR_HZ(100),
  47         SR_MHZ(200),
  48         SR_HZ(100),
  49 };
  50
  51 SR_PRIV struct sr_dev_driver link_mso19_driver_info;
  52 static struct sr_dev_driver *di = &link_mso19_driver_info;
  53
  54 /* TODO: Use sr_dev_inst to store connection handle & use std_dev_clear(). */
  55 static int dev_clear(void)
  56 {
  57         GSList *l;
  58         struct sr_dev_inst *sdi;
  59         struct drv_context *drvc;
  60         struct dev_context *devc;
  61         int ret = SR_OK;
  62
  63         if (!(drvc = di->priv))
  64                 return SR_OK;
  65
  66         /* Properly close and free all devices. */
  67         for (l = drvc->instances; l; l = l->next) {
  68                 if (!(sdi = l->data)) {
  69                         /* Log error, but continue cleaning up the rest. */
  70                         sr_err("%s: sdi was NULL, continuing", __func__);
  71                         ret = SR_ERR_BUG;
  72                         continue;
  73                 }
  74                 if (!(devc = sdi->priv)) {
  75                         /* Log error, but continue cleaning up the rest. */
  76                         sr_err("%s: sdi->priv was NULL, continuing", __func__);
  77                         ret = SR_ERR_BUG;
  78                         continue;
  79                 }
  80                 std_serial_dev_close(sdi);
  81                 sr_serial_dev_inst_free(devc->serial);
  82                 sr_dev_inst_free(sdi);
  83         }
  84         g_slist_free(drvc->instances);
  85         drvc->instances = NULL;
  86
  87         return ret;
  88 }
  89
  90 static int init(struct sr_context *sr_ctx)
  91 {
  92         return std_init(sr_ctx, di, LOG_PREFIX);
  93 }
  94
  95 static GSList *scan(GSList *options)
  96 {
  97         int i;
  98         GSList *devices = NULL;
  99         const char *conn = NULL;
 100         const char *serialcomm = NULL;
 101         GSList *l;
 102         struct sr_config *src;
 103         struct udev *udev;
 104         int ptype;
 105
 106         for (l = options; l; l = l->next) {
 107                 src = l->data;
 108                 switch (src->key) {
 109                 case SR_CONF_CONN:
 110                         conn = g_variant_get_string(src->data, NULL);
 111                         break;
 112                 case SR_CONF_SERIALCOMM:
 113                         serialcomm = g_variant_get_string(src->data, NULL);
 114                         break;
 115                 }
 116         }
 117         if (!conn)
 118                 conn = SERIALCONN;
 119         if (serialcomm == NULL)
 120                 serialcomm = SERIALCOMM;
 121
 122         udev = udev_new();
 123         if (!udev) {
 124                 sr_err("Failed to initialize udev.");
 125         }
 126
 127         struct udev_enumerate *enumerate = udev_enumerate_new(udev);
 128         udev_enumerate_add_match_subsystem(enumerate, "usb-serial");
 129         udev_enumerate_scan_devices(enumerate);
 130         struct udev_list_entry *devs = udev_enumerate_get_list_entry(enumerate);
 131         struct udev_list_entry *dev_list_entry;
 132         for (dev_list_entry = devs;
 133              dev_list_entry != NULL;
 134              dev_list_entry = udev_list_entry_get_next(dev_list_entry)) {
 135                 const char *syspath = udev_list_entry_get_name(dev_list_entry);
 136                 struct udev_device *dev =
 137                     udev_device_new_from_syspath(udev, syspath);
 138                 const char *sysname = udev_device_get_sysname(dev);
 139                 struct udev_device *parent =
 140                     udev_device_get_parent_with_subsystem_devtype(dev, "usb",
 141                                                                   "usb_device");
 142
 143                 if (!parent) {
 144                         sr_err("Unable to find parent usb device for %s",
 145                                sysname);
 146                         continue;
 147                 }
 148
 149                 const char *idVendor =
 150                     udev_device_get_sysattr_value(parent, "idVendor");
 151                 const char *idProduct =
 152                     udev_device_get_sysattr_value(parent, "idProduct");
 153                 if (strcmp(USB_VENDOR, idVendor)
 154                     || strcmp(USB_PRODUCT, idProduct))
 155                         continue;
 156
 157                 const char *iSerial =
 158                     udev_device_get_sysattr_value(parent, "serial");
 159                 const char *iProduct =
 160                     udev_device_get_sysattr_value(parent, "product");
 161
 162                 char path[32];
 163                 snprintf(path, sizeof(path), "/dev/%s", sysname);
 164                 conn = path;
 165
 166                 size_t s = strcspn(iProduct, " ");
 167                 char product[32];
 168                 char manufacturer[32];
 169                 if (s > sizeof(product) ||
 170                     strlen(iProduct) - s > sizeof(manufacturer)) {
 171                         sr_err("Could not parse iProduct: %s.", iProduct);
 172                         continue;
 173                 }
 174                 strncpy(product, iProduct, s);
 175                 product[s] = 0;
 176                 strcpy(manufacturer, iProduct + s + 1);
 177
 178                 //Create the device context and set its params
 179                 struct dev_context *devc;
 180                 if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
 181                         sr_err("Device context malloc failed.");
 182                         return devices;
 183                 }
 184
 185                 if (mso_parse_serial(iSerial, iProduct, devc) != SR_OK) {
 186                         sr_err("Invalid iSerial: %s.", iSerial);
 187                         g_free(devc);
 188                         return devices;
 189                 }
 190
 191                 char hwrev[32];
 192                 sprintf(hwrev, "r%d", devc->hwrev);
 193                 devc->ctlbase1 = 0;
 194                 devc->protocol_trigger.spimode = 0;
 195                 for (i = 0; i < 4; i++) {
 196                         devc->protocol_trigger.word[i] = 0;
 197                         devc->protocol_trigger.mask[i] = 0xff;
 198                 }
 199
 200                 if (!(devc->serial = sr_serial_dev_inst_new(conn, serialcomm))) {
 201                         g_free(devc);
 202                         return devices;
 203                 }
 204
 205                 struct sr_dev_inst *sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 206                                                 manufacturer, product, hwrev);
 207
 208                 if (!sdi) {
 209                         sr_err("Unable to create device instance for %s",
 210                                sysname);
 211                         sr_dev_inst_free(sdi);
 212                         g_free(devc);
 213                         return devices;
 214                 }
 215
 216                 sdi->driver = di;
 217                 sdi->priv = devc;
 218
 219                 for (i = 0; i < NUM_PROBES; i++) {
 220                         struct sr_channel *ch;
 221                         ptype = (i == 0) ? SR_PROBE_ANALOG : SR_PROBE_LOGIC;
 222                         if (!(ch = sr_probe_new(i, ptype, TRUE,
 223                                                    mso19_channel_names[i])))
 224                                 return 0;
 225                         sdi->channels = g_slist_append(sdi->channels, ch);
 226                 }
 227
 228                 //Add the driver
 229                 struct drv_context *drvc = di->priv;
 230                 drvc->instances = g_slist_append(drvc->instances, sdi);
 231                 devices = g_slist_append(devices, sdi);
 232         }
 233
 234         return devices;
 235 }
 236
 237 static GSList *dev_list(void)
 238 {
 239         return ((struct drv_context *)(di->priv))->instances;
 240 }
 241
 242 static int dev_open(struct sr_dev_inst *sdi)
 243 {
 244         int ret;
 245         struct dev_context *devc;
 246
 247         devc = sdi->priv;
 248
 249         if (serial_open(devc->serial, SERIAL_RDWR) != SR_OK)
 250                 return SR_ERR;
 251
 252         sdi->status = SR_ST_ACTIVE;
 253
 254         /* FIXME: discard serial buffer */
 255         mso_check_trigger(devc->serial, &devc->trigger_state);
 256         sr_dbg("Trigger state: 0x%x.", devc->trigger_state);
 257
 258         ret = mso_reset_adc(sdi);
 259         if (ret != SR_OK)
 260                 return ret;
 261
 262         mso_check_trigger(devc->serial, &devc->trigger_state);
 263         sr_dbg("Trigger state: 0x%x.", devc->trigger_state);
 264
 265         //    ret = mso_reset_fsm(sdi);
 266         //    if (ret != SR_OK)
 267         //            return ret;
 268         //    return SR_ERR;
 269
 270         return SR_OK;
 271 }
 272
 273 static int cleanup(void)
 274 {
 275         return dev_clear();
 276 }
 277
 278 static int config_get(int id, GVariant **data, const struct sr_dev_inst *sdi,
 279                 const struct sr_channel_group *cg)
 280 {
 281         struct dev_context *devc;
 282
 283         (void)cg;
 284
 285         switch (id) {
 286         case SR_CONF_SAMPLERATE:
 287                 if (sdi) {
 288                         devc = sdi->priv;
 289                         *data = g_variant_new_uint64(devc->cur_rate);
 290                 } else
 291                         return SR_ERR;
 292                 break;
 293         default:
 294                 return SR_ERR_NA;
 295         }
 296
 297         return SR_OK;
 298 }
 299
 300 static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi,
 301                 const struct sr_channel_group *cg)
 302 {
 303         int ret;
 304         struct dev_context *devc;
 305         uint64_t num_samples;
 306         const char *slope;
 307         int trigger_pos;
 308         double pos;
 309
 310         (void)cg;
 311         devc = sdi->priv;
 312
 313         if (sdi->status != SR_ST_ACTIVE)
 314                 return SR_ERR_DEV_CLOSED;
 315
 316         switch (id) {
 317         case SR_CONF_SAMPLERATE:
 318                 // FIXME
 319                 return mso_configure_rate(sdi, g_variant_get_uint64(data));
 320                 ret = SR_OK;
 321                 break;
 322         case SR_CONF_LIMIT_SAMPLES:
 323                 num_samples = g_variant_get_uint64(data);
 324                 if (num_samples != 1024) {
 325                         sr_err("Only 1024 samples are supported.");
 326                         ret = SR_ERR_ARG;
 327                 } else {
 328                         devc->limit_samples = num_samples;
 329                         sr_dbg("setting limit_samples to %i\n",
 330                                num_samples);
 331                         ret = SR_OK;
 332                 }
 333                 break;
 334         case SR_CONF_CAPTURE_RATIO:
 335                 ret = SR_OK;
 336                 break;
 337         case SR_CONF_TRIGGER_SLOPE:
 338                 slope = g_variant_get_string(data, NULL);
 339
 340                 if (!slope || !(slope[0] == 'f' || slope[0] == 'r'))
 341                         sr_err("Invalid trigger slope");
 342                         ret = SR_ERR_ARG;
 343                 } else {
 344                         devc->trigger_slope = (slope[0] == 'r')
 345                                 ? SLOPE_POSITIVE : SLOPE_NEGATIVE;
 346                         ret = SR_OK;
 347                 }
 348                 break;
 349         case SR_CONF_HORIZ_TRIGGERPOS:
 350                 pos = g_variant_get_double(data);
 351                 if (pos < 0 || pos > 255) {
 352                         sr_err("Trigger position (%f) should be between 0 and 255.", pos);
 353                         ret = SR_ERR_ARG;
 354                 } else {
 355                         trigger_pos = (int)pos;
 356                         devc->trigger_holdoff[0] = trigger_pos & 0xff;
 357                         ret = SR_OK;
 358                 }
 359                 break;
 360         case SR_CONF_RLE:
 361                 ret = SR_OK;
 362                 break;
 363         default:
 364                 ret = SR_ERR_NA;
 365                 break;
 366         }
 367
 368         return ret;
 369 }
 370
 371 static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi,
 372                 const struct sr_channel_group *cg)
 373 {
 374         GVariant *gvar;
 375         GVariantBuilder gvb;
 376
 377         (void)cg;
 378         (void)sdi;
 379
 380         switch (key) {
 381         case SR_CONF_DEVICE_OPTIONS:
 382                 *data = g_variant_new_fixed_array(G_VARIANT_TYPE_INT32,
 383                                 hwcaps, ARRAY_SIZE(hwcaps), sizeof(int32_t));
 384                 break;
 385         case SR_CONF_SAMPLERATE:
 386                 g_variant_builder_init(&gvb, G_VARIANT_TYPE("a{sv}"));
 387                 gvar = g_variant_new_fixed_array(G_VARIANT_TYPE("t"), samplerates,
 388                                 ARRAY_SIZE(samplerates), sizeof(uint64_t));
 389                 g_variant_builder_add(&gvb, "{sv}", "samplerate-steps", gvar);
 390                 *data = g_variant_builder_end(&gvb);
 391                 break;
 392         case SR_CONF_TRIGGER_TYPE:
 393                 *data = g_variant_new_string(TRIGGER_TYPE);
 394                 break;
 395         default:
 396                 return SR_ERR_NA;
 397         }
 398
 399         return SR_OK;
 400 }
 401
 402 static int dev_acquisition_start(const struct sr_dev_inst *sdi, void *cb_data)
 403 {
 404         struct dev_context *devc;
 405         int ret = SR_ERR;
 406
 407         if (sdi->status != SR_ST_ACTIVE)
 408                 return SR_ERR_DEV_CLOSED;
 409
 410         devc = sdi->priv;
 411
 412         if (mso_configure_channels(sdi) != SR_OK) {
 413                 sr_err("Failed to configure channels.");
 414                 return SR_ERR;
 415         }
 416
 417         /* FIXME: No need to do full reconfigure every time */
 418 //      ret = mso_reset_fsm(sdi);
 419 //      if (ret != SR_OK)
 420 //              return ret;
 421
 422         /* FIXME: ACDC Mode */
 423         devc->ctlbase1 &= 0x7f;
 424 //      devc->ctlbase1 |= devc->acdcmode;
 425
 426         ret = mso_configure_rate(sdi, devc->cur_rate);
 427         if (ret != SR_OK)
 428                 return ret;
 429
 430         /* set dac offset */
 431         ret = mso_dac_out(sdi, devc->dac_offset);
 432         if (ret != SR_OK)
 433                 return ret;
 434
 435         ret = mso_configure_threshold_level(sdi);
 436         if (ret != SR_OK)
 437                 return ret;
 438
 439         ret = mso_configure_trigger(sdi);
 440         if (ret != SR_OK)
 441                 return ret;
 442
 443         /* END of config hardware part */
 444         ret = mso_arm(sdi);
 445         if (ret != SR_OK)
 446                 return ret;
 447
 448         /* Start acquisition on the device. */
 449         mso_check_trigger(devc->serial, &devc->trigger_state);
 450         ret = mso_check_trigger(devc->serial, NULL);
 451         if (ret != SR_OK)
 452                 return ret;
 453
 454         /* Reset trigger state. */
 455         devc->trigger_state = 0x00;
 456
 457         /* Send header packet to the session bus. */
 458         std_session_send_df_header(cb_data, LOG_PREFIX);
 459
 460         /* Our first channel is analog, the other 8 are of type 'logic'. */
 461         /* TODO. */
 462
 463         serial_source_add(devc->serial, G_IO_IN, -1, mso_receive_data, cb_data);
 464
 465         return SR_OK;
 466 }
 467
 468 /* This stops acquisition on ALL devices, ignoring dev_index. */
 469 static int dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 470 {
 471         (void)cb_data;
 472
 473         stop_acquisition(sdi);
 474
 475         return SR_OK;
 476 }
 477
 478 SR_PRIV struct sr_dev_driver link_mso19_driver_info = {
 479         .name = "link-mso19",
 480         .longname = "Link Instruments MSO-19",
 481         .api_version = 1,
 482         .init = init,
 483         .cleanup = cleanup,
 484         .scan = scan,
 485         .dev_list = dev_list,
 486         .dev_clear = dev_clear,
 487         .config_get = config_get,
 488         .config_set = config_set,
 489         .config_list = config_list,
 490         .dev_open = dev_open,
 491         .dev_close = std_serial_dev_close,
 492         .dev_acquisition_start = dev_acquisition_start,
 493         .dev_acquisition_stop = dev_acquisition_stop,
 494         .priv = NULL,
 495 };