hwdriver.c

   1 /*
   2  * This file is part of the libsigrok project.
   3  *
   4  * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
   5  *
   6  * This program is free software: you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation, either version 3 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22 #include <sys/types.h>
  23 #include <dirent.h>
  24 #include <string.h>
  25 #include <glib.h>
  26 #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
  27 #include "libsigrok.h"
  28 #include "libsigrok-internal.h"
  29
  30 /* Message logging helpers with subsystem-specific prefix string. */
  31 #define LOG_PREFIX "hwdriver: "
  32 #define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
  33 #define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
  34 #define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
  35 #define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
  36 #define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
  37 #define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
  38
  39 /**
  40  * @file
  41  *
  42  * Hardware driver handling in libsigrok.
  43  */
  44
  45 /**
  46  * @defgroup grp_driver Hardware drivers
  47  *
  48  * Hardware driver handling in libsigrok.
  49  *
  50  * @{
  51  */
  52
  53 static struct sr_config_info sr_config_info_data[] = {
  54         {SR_CONF_CONN, SR_T_CHAR, "conn",
  55                 "Connection", NULL},
  56         {SR_CONF_SERIALCOMM, SR_T_CHAR, "serialcomm",
  57                 "Serial communication", NULL},
  58         {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate",
  59                 "Sample rate", NULL},
  60         {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio",
  61                 "Pre-trigger capture ratio", NULL},
  62         {SR_CONF_PATTERN_MODE, SR_T_CHAR, "pattern",
  63                 "Pattern generator mode", NULL},
  64         {SR_CONF_TRIGGER_TYPE, SR_T_CHAR, "triggertype",
  65                 "Trigger types", NULL},
  66         {SR_CONF_RLE, SR_T_BOOL, "rle",
  67                 "Run Length Encoding", NULL},
  68         {SR_CONF_TRIGGER_SLOPE, SR_T_UINT64, "triggerslope",
  69                 "Trigger slope", NULL},
  70         {SR_CONF_TRIGGER_SOURCE, SR_T_CHAR, "triggersource",
  71                 "Trigger source", NULL},
  72         {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
  73                 "Horizontal trigger position", NULL},
  74         {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
  75                 "Buffer size", NULL},
  76         {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase",
  77                 "Time base", NULL},
  78         {SR_CONF_FILTER, SR_T_CHAR, "filter",
  79                 "Filter targets", NULL},
  80         {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv",
  81                 "Volts/div", NULL},
  82         {SR_CONF_COUPLING, SR_T_CHAR, "coupling",
  83                 "Coupling", NULL},
  84         {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
  85                 "Datalog", NULL},
  86         {0, 0, NULL, NULL, NULL},
  87 };
  88
  89 /** @cond PRIVATE */
  90 #ifdef HAVE_HW_BRYMEN_DMM
  91 extern SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
  92 #endif
  93 #ifdef HAVE_HW_COLEAD_SLM
  94 extern SR_PRIV struct sr_dev_driver colead_slm_driver_info;
  95 #endif
  96 #ifdef HAVE_LA_DEMO
  97 extern SR_PRIV struct sr_dev_driver demo_driver_info;
  98 #endif
  99 #ifdef HAVE_HW_LASCAR_EL_USB
 100 extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
 101 #endif
 102 #ifdef HAVE_HW_MIC_985XX
 103 extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
 104 extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 105 #endif
 106 #ifdef HAVE_LA_OLS
 107 extern SR_PRIV struct sr_dev_driver ols_driver_info;
 108 #endif
 109 #ifdef HAVE_HW_RIGOL_DS1XX2
 110 extern SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
 111 #endif
 112 #ifdef HAVE_HW_TONDAJ_SL_814
 113 extern SR_PRIV struct sr_dev_driver tondaj_sl_814_driver_info;
 114 #endif
 115 #ifdef HAVE_HW_VICTOR_DMM
 116 extern SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
 117 #endif
 118 #ifdef HAVE_LA_ZEROPLUS_LOGIC_CUBE
 119 extern SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 120 #endif
 121 #ifdef HAVE_LA_ASIX_SIGMA
 122 extern SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
 123 #endif
 124 #ifdef HAVE_LA_CHRONOVU_LA8
 125 extern SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
 126 #endif
 127 #ifdef HAVE_HW_ALSA
 128 extern SR_PRIV struct sr_dev_driver alsa_driver_info;
 129 #endif
 130 #ifdef HAVE_LA_FX2LAFW
 131 extern SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 132 #endif
 133 #ifdef HAVE_HW_HANTEK_DSO
 134 extern SR_PRIV struct sr_dev_driver hantek_dso_driver_info;
 135 #endif
 136 #ifdef HAVE_HW_AGILENT_DMM
 137 extern SR_PRIV struct sr_dev_driver agdmm_driver_info;
 138 #endif
 139 #ifdef HAVE_HW_FLUKE_DMM
 140 extern SR_PRIV struct sr_dev_driver flukedmm_driver_info;
 141 #endif
 142 #ifdef HAVE_HW_SERIAL_DMM
 143 extern SR_PRIV struct sr_dev_driver digitek_dt4000zc_driver_info;
 144 extern SR_PRIV struct sr_dev_driver tekpower_tp4000zc_driver_info;
 145 extern SR_PRIV struct sr_dev_driver metex_me31_driver_info;
 146 extern SR_PRIV struct sr_dev_driver peaktech_3410_driver_info;
 147 extern SR_PRIV struct sr_dev_driver mastech_mas345_driver_info;
 148 extern SR_PRIV struct sr_dev_driver va_va18b_driver_info;
 149 extern SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
 150 extern SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
 151 extern SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
 152 extern SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
 153 extern SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
 154 extern SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
 155 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_ser_driver_info;
 156 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
 157 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
 158 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
 159 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
 160 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
 161 #endif
 162 #ifdef HAVE_HW_UNI_T_DMM
 163 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8060_driver_info;
 164 extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_driver_info;
 165 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
 166 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_driver_info;
 167 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
 168 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_driver_info;
 169 #endif
 170 /** @endcond */
 171
 172 static struct sr_dev_driver *drivers_list[] = {
 173 #ifdef HAVE_HW_BRYMEN_DMM
 174         &brymen_bm857_driver_info,
 175 #endif
 176 #ifdef HAVE_HW_COLEAD_SLM
 177         &colead_slm_driver_info,
 178 #endif
 179 #ifdef HAVE_LA_DEMO
 180         &demo_driver_info,
 181 #endif
 182 #ifdef HAVE_HW_LASCAR_EL_USB
 183         &lascar_el_usb_driver_info,
 184 #endif
 185 #ifdef HAVE_HW_MIC_985XX
 186         &mic_98581_driver_info,
 187         &mic_98583_driver_info,
 188 #endif
 189 #ifdef HAVE_LA_OLS
 190         &ols_driver_info,
 191 #endif
 192 #ifdef HAVE_HW_RIGOL_DS1XX2
 193         &rigol_ds1xx2_driver_info,
 194 #endif
 195 #ifdef HAVE_HW_TONDAJ_SL_814
 196         &tondaj_sl_814_driver_info,
 197 #endif
 198 #ifdef HAVE_HW_VICTOR_DMM
 199         &victor_dmm_driver_info,
 200 #endif
 201 #ifdef HAVE_LA_ZEROPLUS_LOGIC_CUBE
 202         &zeroplus_logic_cube_driver_info,
 203 #endif
 204 #ifdef HAVE_LA_ASIX_SIGMA
 205         &asix_sigma_driver_info,
 206 #endif
 207 #ifdef HAVE_LA_CHRONOVU_LA8
 208         &chronovu_la8_driver_info,
 209 #endif
 210 #ifdef HAVE_HW_ALSA
 211         &alsa_driver_info,
 212 #endif
 213 #ifdef HAVE_LA_FX2LAFW
 214         &fx2lafw_driver_info,
 215 #endif
 216 #ifdef HAVE_HW_HANTEK_DSO
 217         &hantek_dso_driver_info,
 218 #endif
 219 #ifdef HAVE_HW_AGILENT_DMM
 220         &agdmm_driver_info,
 221 #endif
 222 #ifdef HAVE_HW_FLUKE_DMM
 223         &flukedmm_driver_info,
 224 #endif
 225 #ifdef HAVE_HW_SERIAL_DMM
 226         &digitek_dt4000zc_driver_info,
 227         &tekpower_tp4000zc_driver_info,
 228         &metex_me31_driver_info,
 229         &peaktech_3410_driver_info,
 230         &mastech_mas345_driver_info,
 231         &va_va18b_driver_info,
 232         &metex_m3640d_driver_info,
 233         &peaktech_4370_driver_info,
 234         &pce_pce_dm32_driver_info,
 235         &radioshack_22_168_driver_info,
 236         &radioshack_22_805_driver_info,
 237         &radioshack_22_812_driver_info,
 238         &tecpel_dmm_8060_ser_driver_info,
 239         &tecpel_dmm_8061_ser_driver_info,
 240         &voltcraft_vc820_ser_driver_info,
 241         &voltcraft_vc840_ser_driver_info,
 242         &uni_t_ut61d_ser_driver_info,
 243         &uni_t_ut61e_ser_driver_info,
 244 #endif
 245 #ifdef HAVE_HW_UNI_T_DMM
 246         &tecpel_dmm_8060_driver_info,
 247         &tecpel_dmm_8061_driver_info,
 248         &uni_t_ut61d_driver_info,
 249         &uni_t_ut61e_driver_info,
 250         &voltcraft_vc820_driver_info,
 251         &voltcraft_vc840_driver_info,
 252 #endif
 253         NULL,
 254 };
 255
 256 /**
 257  * Return the list of supported hardware drivers.
 258  *
 259  * @return Pointer to the NULL-terminated list of hardware driver pointers.
 260  */
 261 SR_API struct sr_dev_driver **sr_driver_list(void)
 262 {
 263
 264         return drivers_list;
 265 }
 266
 267 /**
 268  * Initialize a hardware driver.
 269  *
 270  * This usually involves memory allocations and variable initializations
 271  * within the driver, but _not_ scanning for attached devices.
 272  * The API call sr_driver_scan() is used for that.
 273  *
 274  * @param ctx A libsigrok context object allocated by a previous call to
 275  *            sr_init(). Must not be NULL.
 276  * @param driver The driver to initialize. This must be a pointer to one of
 277  *               the entries returned by sr_driver_list(). Must not be NULL.
 278  *
 279  * @return SR_OK upon success, SR_ERR_ARG upon invalid parameters,
 280  *         SR_ERR_BUG upon internal errors, or another negative error code
 281  *         upon other errors.
 282  */
 283 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
 284 {
 285         int ret;
 286
 287         if (!ctx) {
 288                 sr_err("Invalid libsigrok context, can't initialize.");
 289                 return SR_ERR_ARG;
 290         }
 291
 292         if (!driver) {
 293                 sr_err("Invalid driver, can't initialize.");
 294                 return SR_ERR_ARG;
 295         }
 296
 297         sr_spew("Initializing driver '%s'.", driver->name);
 298         if ((ret = driver->init(ctx)) < 0)
 299                 sr_err("Failed to initialize the driver: %d.", ret);
 300
 301         return ret;
 302 }
 303
 304 /**
 305  * Tell a hardware driver to scan for devices.
 306  *
 307  * In addition to the detection, the devices that are found are also
 308  * initialized automatically. On some devices, this involves a firmware upload,
 309  * or other such measures.
 310  *
 311  * The order in which the system is scanned for devices is not specified. The
 312  * caller should not assume or rely on any specific order.
 313  *
 314  * Before calling sr_driver_scan(), the user must have previously initialized
 315  * the driver by calling sr_driver_init().
 316  *
 317  * @param driver The driver that should scan. This must be a pointer to one of
 318  *               the entries returned by sr_driver_list(). Must not be NULL.
 319  * @param options A list of 'struct sr_hwopt' options to pass to the driver's
 320  *                scanner. Can be NULL/empty.
 321  *
 322  * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
 323  *         found (or errors were encountered). This list must be freed by the
 324  *         caller using g_slist_free(), but without freeing the data pointed
 325  *         to in the list.
 326  */
 327 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
 328 {
 329         GSList *l;
 330
 331         if (!driver) {
 332                 sr_err("Invalid driver, can't scan for devices.");
 333                 return NULL;
 334         }
 335
 336         if (!driver->priv) {
 337                 sr_err("Driver not initialized, can't scan for devices.");
 338                 return NULL;
 339         }
 340
 341         l = driver->scan(options);
 342
 343         sr_spew("Scan of '%s' found %d devices.", driver->name,
 344                 g_slist_length(l));
 345
 346         return l;
 347 }
 348
 349 /** @private */
 350 SR_PRIV void sr_hw_cleanup_all(void)
 351 {
 352         int i;
 353         struct sr_dev_driver **drivers;
 354
 355         drivers = sr_driver_list();
 356         for (i = 0; drivers[i]; i++) {
 357                 if (drivers[i]->cleanup)
 358                         drivers[i]->cleanup();
 359         }
 360 }
 361
 362 /** A floating reference can be passed in for data. */
 363 SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
 364 {
 365         struct sr_config *src;
 366
 367         if (!(src = g_try_malloc(sizeof(struct sr_config))))
 368                 return NULL;
 369         src->key = key;
 370         src->data = g_variant_ref_sink(data);
 371
 372         return src;
 373 }
 374
 375 SR_PRIV void sr_config_free(struct sr_config *src)
 376 {
 377
 378         if (!src || !src->data) {
 379                 sr_err("%s: invalid data!", __func__);
 380                 return;
 381         }
 382
 383         g_variant_unref(src->data);
 384         g_free(src);
 385
 386 }
 387
 388 /**
 389  * Returns information about the given driver or device instance.
 390  *
 391  * @param driver The sr_dev_driver struct to query.
 392  * @param key The configuration key (SR_CONF_*).
 393  * @param data Pointer to a GVariant where the value will be stored. Must
 394  *             not be NULL. The caller is given ownership of the GVariant
 395  *             and must thus decrease the refcount after use. However if
 396  *             this function returns an error code, the field should be
 397  *             considered unused, and should not be unreferenced.
 398  * @param sdi (optional) If the key is specific to a device, this must
 399  *            contain a pointer to the struct sr_dev_inst to be checked.
 400  *            Otherwise it must be NULL.
 401  *
 402  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 403  *         may be returned by the driver indicating it doesn't know that key,
 404  *         but this is not to be flagged as an error by the caller; merely
 405  *         as an indication that it's not applicable.
 406  */
 407 SR_API int sr_config_get(const struct sr_dev_driver *driver, int key,
 408                 GVariant **data, const struct sr_dev_inst *sdi)
 409 {
 410         int ret;
 411
 412         if (!driver || !data)
 413                 return SR_ERR;
 414
 415         if (!driver->config_get)
 416                 return SR_ERR_ARG;
 417
 418         if ((ret = driver->config_get(key, data, sdi)) == SR_OK) {
 419                 /* Got a floating reference from the driver. Sink it here,
 420                  * caller will need to unref when done with it. */
 421                 g_variant_ref_sink(*data);
 422         }
 423
 424         return ret;
 425 }
 426
 427 /**
 428  * Set a configuration key in a device instance.
 429  *
 430  * @param sdi The device instance.
 431  * @param key The configuration key (SR_CONF_*).
 432  * @param data The new value for the key, as a GVariant with GVariantType
 433  *        appropriate to that key. A floating reference can be passed
 434  *        in; its refcount will be sunk and unreferenced after use.
 435  *
 436  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 437  *         may be returned by the driver indicating it doesn't know that key,
 438  *         but this is not to be flagged as an error by the caller; merely
 439  *         as an indication that it's not applicable.
 440  */
 441 SR_API int sr_config_set(const struct sr_dev_inst *sdi, int key, GVariant *data)
 442 {
 443         int ret;
 444
 445         g_variant_ref_sink(data);
 446
 447         if (!sdi || !sdi->driver || !data)
 448                 ret = SR_ERR;
 449         else if (!sdi->driver->config_set)
 450                 ret = SR_ERR_ARG;
 451         else
 452                 ret = sdi->driver->config_set(key, data, sdi);
 453
 454         g_variant_unref(data);
 455
 456         return ret;
 457 }
 458
 459 /**
 460  * List all possible values for a configuration key.
 461  *
 462  * @param driver The sr_dev_driver struct to query.
 463  * @param key The configuration key (SR_CONF_*).
 464  * @param data A pointer to a GVariant where the list will be stored. The
 465  *             caller is given ownership of the GVariant and must thus
 466  *             unref the GVariant after use. However if this function
 467  *             returns an error code, the field should be considered
 468  *             unused, and should not be unreferenced.
 469  * @param sdi (optional) If the key is specific to a device, this must
 470  *            contain a pointer to the struct sr_dev_inst to be checked.
 471  *
 472  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
 473  *         may be returned by the driver indicating it doesn't know that key,
 474  *         but this is not to be flagged as an error by the caller; merely
 475  *         as an indication that it's not applicable.
 476  */
 477 SR_API int sr_config_list(const struct sr_dev_driver *driver, int key,
 478                 GVariant **data, const struct sr_dev_inst *sdi)
 479 {
 480         int ret;
 481
 482         if (!driver || !data)
 483                 ret = SR_ERR;
 484         else if (!driver->config_list)
 485                 ret = SR_ERR_ARG;
 486         else if ((ret = driver->config_list(key, data, sdi)) == SR_OK)
 487                 g_variant_ref_sink(*data);
 488
 489         return ret;
 490 }
 491
 492 /**
 493  * Get information about a configuration key.
 494  *
 495  * @param key The configuration key.
 496  *
 497  * @return A pointer to a struct sr_config_info, or NULL if the key
 498  *         was not found.
 499  */
 500 SR_API const struct sr_config_info *sr_config_info_get(int key)
 501 {
 502         int i;
 503
 504         for (i = 0; sr_config_info_data[i].key; i++) {
 505                 if (sr_config_info_data[i].key == key)
 506                         return &sr_config_info_data[i];
 507         }
 508
 509         return NULL;
 510 }
 511
 512 /**
 513  * Get information about an configuration key, by name.
 514  *
 515  * @param optname The configuration key.
 516  *
 517  * @return A pointer to a struct sr_config_info, or NULL if the key
 518  *         was not found.
 519  */
 520 SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
 521 {
 522         int i;
 523
 524         for (i = 0; sr_config_info_data[i].key; i++) {
 525                 if (!strcmp(sr_config_info_data[i].id, optname))
 526                         return &sr_config_info_data[i];
 527         }
 528
 529         return NULL;
 530 }
 531
 532 /* Unnecessary level of indirection follows. */
 533
 534 /** @private */
 535 SR_PRIV int sr_source_remove(int fd)
 536 {
 537         return sr_session_source_remove(fd);
 538 }
 539
 540 /** @private */
 541 SR_PRIV int sr_source_add(int fd, int events, int timeout,
 542                           sr_receive_data_callback_t cb, void *cb_data)
 543 {
 544         return sr_session_source_add(fd, events, timeout, cb, cb_data);
 545 }
 546
 547 /** @} */