2 * This file is part of the libsigrok project.
4 * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
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.
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.
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/>.
22 #include <sys/types.h>
26 #include "config.h" /* Needed for HAVE_LIBUSB_1_0 and others. */
27 #include "libsigrok.h"
28 #include "libsigrok-internal.h"
31 #define LOG_PREFIX "hwdriver"
34 extern SR_PRIV struct sr_dev_driver *drivers_list[];
39 * Hardware driver handling in libsigrok.
43 * @defgroup grp_driver Hardware drivers
45 * Hardware driver handling in libsigrok.
50 static struct sr_config_info sr_config_info_data[] = {
51 {SR_CONF_CONN, SR_T_STRING, "conn",
53 {SR_CONF_SERIALCOMM, SR_T_STRING, "serialcomm",
54 "Serial communication", NULL},
55 {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate",
57 {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio",
58 "Pre-trigger capture ratio", NULL},
59 {SR_CONF_PATTERN_MODE, SR_T_STRING, "pattern",
61 {SR_CONF_TRIGGER_MATCH, SR_T_INT32, "triggermatch",
62 "Trigger matches", NULL},
63 {SR_CONF_EXTERNAL_CLOCK, SR_T_BOOL, "external_clock",
64 "External clock mode", NULL},
65 {SR_CONF_SWAP, SR_T_BOOL, "swap",
66 "Swap channel order", NULL},
67 {SR_CONF_RLE, SR_T_BOOL, "rle",
68 "Run Length Encoding", NULL},
69 {SR_CONF_TRIGGER_SLOPE, SR_T_STRING, "triggerslope",
70 "Trigger slope", NULL},
71 {SR_CONF_TRIGGER_SOURCE, SR_T_STRING, "triggersource",
72 "Trigger source", NULL},
73 {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
74 "Horizontal trigger position", NULL},
75 {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
77 {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase",
79 {SR_CONF_FILTER, SR_T_STRING, "filter",
80 "Filter targets", NULL},
81 {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv",
83 {SR_CONF_COUPLING, SR_T_STRING, "coupling",
85 {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
87 {SR_CONF_SPL_WEIGHT_FREQ, SR_T_STRING, "spl_weight_freq",
88 "Sound pressure level frequency weighting", NULL},
89 {SR_CONF_SPL_WEIGHT_TIME, SR_T_STRING, "spl_weight_time",
90 "Sound pressure level time weighting", NULL},
91 {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max",
93 {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
95 {SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range",
96 "Sound pressure level measurement range", NULL},
97 {SR_CONF_VOLTAGE_THRESHOLD, SR_T_DOUBLE_RANGE, "voltage_threshold",
98 "Voltage threshold", NULL },
99 {SR_CONF_POWER_OFF, SR_T_BOOL, "power_off",
101 {SR_CONF_DATA_SOURCE, SR_T_STRING, "data_source",
102 "Data source", NULL},
103 {SR_CONF_NUM_LOGIC_CHANNELS, SR_T_INT32, "logic_channels",
104 "Number of logic channels", NULL},
105 {SR_CONF_NUM_ANALOG_CHANNELS, SR_T_INT32, "analog_channels",
106 "Number of analog channels", NULL},
107 {SR_CONF_OUTPUT_VOLTAGE, SR_T_FLOAT, "output_voltage",
108 "Current output voltage", NULL},
109 {SR_CONF_OUTPUT_VOLTAGE_TARGET, SR_T_FLOAT, "output_voltage_target",
110 "Output voltage target", NULL},
111 {SR_CONF_OUTPUT_CURRENT, SR_T_FLOAT, "output_current",
112 "Current output current", NULL},
113 {SR_CONF_OUTPUT_CURRENT_LIMIT, SR_T_FLOAT, "output_current_limit",
114 "Output current limit", NULL},
115 {SR_CONF_OUTPUT_ENABLED, SR_T_BOOL, "output_enabled",
116 "Output enabled", NULL},
117 {SR_CONF_OUTPUT_CHANNEL_CONFIG, SR_T_STRING, "output_channel_config",
118 "Output channel modes", NULL},
119 {SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED, SR_T_BOOL, "ovp_enabled",
120 "Over-voltage protection enabled", NULL},
121 {SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE, SR_T_BOOL, "ovp_active",
122 "Over-voltage protection active", NULL},
123 {SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD, SR_T_FLOAT, "ovp_threshold",
124 "Over-voltage protection threshold", NULL},
125 {SR_CONF_OVER_CURRENT_PROTECTION_ENABLED, SR_T_BOOL, "ocp_enabled",
126 "Over-current protection enabled", NULL},
127 {SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE, SR_T_BOOL, "ocp_active",
128 "Over-current protection active", NULL},
129 {SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD, SR_T_FLOAT, "ocp_threshold",
130 "Over-current protection threshold", NULL},
131 {SR_CONF_LIMIT_SAMPLES, SR_T_UINT64, "limit_samples",
132 "Sample limit", NULL},
133 {SR_CONF_CLOCK_EDGE, SR_T_STRING, "clock_edge",
135 {SR_CONF_AMPLITUDE, SR_T_FLOAT, "amplitude",
137 {SR_CONF_OVER_TEMPERATURE_PROTECTION, SR_T_BOOL, "otp",
138 "Over-temperature protection", NULL},
139 {SR_CONF_OUTPUT_REGULATION, SR_T_STRING, "output_regulation",
140 "Output channel regulation", NULL},
141 {SR_CONF_OUTPUT_FREQUENCY, SR_T_UINT64, "output_frequency",
142 "Output frequency", NULL},
143 {SR_CONF_MEASURED_QUANTITY, SR_T_STRING, "measured_quantity",
144 "Measured quantity", NULL},
145 {SR_CONF_MEASURED_2ND_QUANTITY, SR_T_STRING, "measured_2nd_quantity",
146 "Measured secondary quantity", NULL},
147 {SR_CONF_EQUIV_CIRCUIT_MODEL, SR_T_STRING, "equiv_circuit_model",
148 "Equivalent circuit model", NULL},
149 {0, 0, NULL, NULL, NULL},
152 SR_PRIV const GVariantType *sr_variant_type_get(int datatype)
156 return G_VARIANT_TYPE_INT32;
158 return G_VARIANT_TYPE_UINT64;
160 return G_VARIANT_TYPE_STRING;
162 return G_VARIANT_TYPE_BOOLEAN;
164 return G_VARIANT_TYPE_DOUBLE;
165 case SR_T_RATIONAL_PERIOD:
166 case SR_T_RATIONAL_VOLT:
167 case SR_T_UINT64_RANGE:
168 case SR_T_DOUBLE_RANGE:
169 return G_VARIANT_TYPE_TUPLE;
171 return G_VARIANT_TYPE_DICTIONARY;
177 SR_PRIV int sr_variant_type_check(uint32_t key, GVariant *value)
179 const struct sr_config_info *info;
180 const GVariantType *type, *expected;
181 char *expected_string, *type_string;
183 info = sr_config_info_get(key);
187 expected = sr_variant_type_get(info->datatype);
188 type = g_variant_get_type(value);
189 if (!g_variant_type_equal(type, expected)
190 && !g_variant_type_is_subtype_of(type, expected)) {
191 expected_string = g_variant_type_dup_string(expected);
192 type_string = g_variant_type_dup_string(type);
193 sr_err("Wrong variant type for key '%s': expected '%s', got '%s'",
194 info->name, expected_string, type_string);
195 g_free(expected_string);
204 * Return the list of supported hardware drivers.
206 * @return Pointer to the NULL-terminated list of hardware driver pointers.
210 SR_API struct sr_dev_driver **sr_driver_list(void)
217 * Initialize a hardware driver.
219 * This usually involves memory allocations and variable initializations
220 * within the driver, but _not_ scanning for attached devices.
221 * The API call sr_driver_scan() is used for that.
223 * @param ctx A libsigrok context object allocated by a previous call to
224 * sr_init(). Must not be NULL.
225 * @param driver The driver to initialize. This must be a pointer to one of
226 * the entries returned by sr_driver_list(). Must not be NULL.
228 * @retval SR_OK Success
229 * @retval SR_ERR_ARG Invalid parameter(s).
230 * @retval SR_ERR_BUG Internal errors.
231 * @retval other Another negative error code upon other errors.
235 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
240 sr_err("Invalid libsigrok context, can't initialize.");
245 sr_err("Invalid driver, can't initialize.");
249 sr_spew("Initializing driver '%s'.", driver->name);
250 if ((ret = driver->init(ctx)) < 0)
251 sr_err("Failed to initialize the driver: %d.", ret);
257 * Tell a hardware driver to scan for devices.
259 * In addition to the detection, the devices that are found are also
260 * initialized automatically. On some devices, this involves a firmware upload,
261 * or other such measures.
263 * The order in which the system is scanned for devices is not specified. The
264 * caller should not assume or rely on any specific order.
266 * Before calling sr_driver_scan(), the user must have previously initialized
267 * the driver by calling sr_driver_init().
269 * @param driver The driver that should scan. This must be a pointer to one of
270 * the entries returned by sr_driver_list(). Must not be NULL.
271 * @param options A list of 'struct sr_hwopt' options to pass to the driver's
272 * scanner. Can be NULL/empty.
274 * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
275 * found (or errors were encountered). This list must be freed by the
276 * caller using g_slist_free(), but without freeing the data pointed
281 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
284 struct sr_config *src;
287 sr_err("Invalid driver, can't scan for devices.");
292 sr_err("Driver not initialized, can't scan for devices.");
296 for (l = options; l; l = l->next) {
298 if (sr_variant_type_check(src->key, src->data) != SR_OK)
302 l = driver->scan(options);
304 sr_spew("Scan of '%s' found %d devices.", driver->name,
310 /** Call driver cleanup function for all drivers.
312 SR_PRIV void sr_hw_cleanup_all(void)
315 struct sr_dev_driver **drivers;
317 drivers = sr_driver_list();
318 for (i = 0; drivers[i]; i++) {
319 if (drivers[i]->cleanup)
320 drivers[i]->cleanup();
324 /** Allocate struct sr_config.
325 * A floating reference can be passed in for data.
328 SR_PRIV struct sr_config *sr_config_new(uint32_t key, GVariant *data)
330 struct sr_config *src;
332 if (!(src = g_try_malloc(sizeof(struct sr_config))))
335 src->data = g_variant_ref_sink(data);
340 /** Free struct sr_config.
343 SR_PRIV void sr_config_free(struct sr_config *src)
346 if (!src || !src->data) {
347 sr_err("%s: invalid data!", __func__);
351 g_variant_unref(src->data);
357 * Query value of a configuration key at the given driver or device instance.
359 * @param[in] driver The sr_dev_driver struct to query.
360 * @param[in] sdi (optional) If the key is specific to a device, this must
361 * contain a pointer to the struct sr_dev_inst to be checked.
362 * Otherwise it must be NULL.
363 * @param[in] cg The channel group on the device for which to list the
365 * @param[in] key The configuration key (SR_CONF_*).
366 * @param[in,out] data Pointer to a GVariant where the value will be stored.
367 * Must not be NULL. The caller is given ownership of the GVariant
368 * and must thus decrease the refcount after use. However if
369 * this function returns an error code, the field should be
370 * considered unused, and should not be unreferenced.
372 * @retval SR_OK Success.
373 * @retval SR_ERR Error.
374 * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
375 * interpreted as an error by the caller; merely as an indication
376 * that it's not applicable.
380 SR_API int sr_config_get(const struct sr_dev_driver *driver,
381 const struct sr_dev_inst *sdi,
382 const struct sr_channel_group *cg,
383 uint32_t key, GVariant **data)
387 if (!driver || !data)
390 if (!driver->config_get)
393 if ((ret = driver->config_get(key, data, sdi, cg)) == SR_OK) {
394 /* Got a floating reference from the driver. Sink it here,
395 * caller will need to unref when done with it. */
396 g_variant_ref_sink(*data);
403 * Set value of a configuration key in a device instance.
405 * @param[in] sdi The device instance.
406 * @param[in] cg The channel group on the device for which to list the
408 * @param[in] key The configuration key (SR_CONF_*).
409 * @param data The new value for the key, as a GVariant with GVariantType
410 * appropriate to that key. A floating reference can be passed
411 * in; its refcount will be sunk and unreferenced after use.
413 * @retval SR_OK Success.
414 * @retval SR_ERR Error.
415 * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
416 * interpreted as an error by the caller; merely as an indication
417 * that it's not applicable.
421 SR_API int sr_config_set(const struct sr_dev_inst *sdi,
422 const struct sr_channel_group *cg,
423 uint32_t key, GVariant *data)
427 g_variant_ref_sink(data);
429 if (!sdi || !sdi->driver || !data)
431 else if (!sdi->driver->config_set)
433 else if ((ret = sr_variant_type_check(key, data)) == SR_OK)
434 ret = sdi->driver->config_set(key, data, sdi, cg);
436 g_variant_unref(data);
442 * Apply configuration settings to the device hardware.
444 * @param sdi The device instance.
446 * @return SR_OK upon success or SR_ERR in case of error.
450 SR_API int sr_config_commit(const struct sr_dev_inst *sdi)
454 if (!sdi || !sdi->driver)
456 else if (!sdi->driver->config_commit)
459 ret = sdi->driver->config_commit(sdi);
465 * List all possible values for a configuration key.
467 * @param[in] driver The sr_dev_driver struct to query.
468 * @param[in] sdi (optional) If the key is specific to a device, this must
469 * contain a pointer to the struct sr_dev_inst to be checked.
470 * @param[in] cg The channel group on the device for which to list the
472 * @param[in] key The configuration key (SR_CONF_*).
473 * @param[in,out] data A pointer to a GVariant where the list will be stored.
474 * The caller is given ownership of the GVariant and must thus
475 * unref the GVariant after use. However if this function
476 * returns an error code, the field should be considered
477 * unused, and should not be unreferenced.
479 * @retval SR_OK Success.
480 * @retval SR_ERR Error.
481 * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
482 * interpreted as an error by the caller; merely as an indication
483 * that it's not applicable.
487 SR_API int sr_config_list(const struct sr_dev_driver *driver,
488 const struct sr_dev_inst *sdi,
489 const struct sr_channel_group *cg,
490 uint32_t key, GVariant **data)
494 if (!driver || !data)
496 else if (!driver->config_list)
498 else if ((ret = driver->config_list(key, data, sdi, cg)) == SR_OK)
499 g_variant_ref_sink(*data);
505 * Get information about a configuration key, by key.
507 * @param[in] key The configuration key.
509 * @return A pointer to a struct sr_config_info, or NULL if the key
514 SR_API const struct sr_config_info *sr_config_info_get(uint32_t key)
518 for (i = 0; sr_config_info_data[i].key; i++) {
519 if (sr_config_info_data[i].key == key)
520 return &sr_config_info_data[i];
527 * Get information about a configuration key, by name.
529 * @param[in] optname The configuration key.
531 * @return A pointer to a struct sr_config_info, or NULL if the key
536 SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
540 for (i = 0; sr_config_info_data[i].key; i++) {
541 if (!strcmp(sr_config_info_data[i].id, optname))
542 return &sr_config_info_data[i];