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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 <config.h> | |
21 | #include <stdlib.h> | |
22 | #include <stdio.h> | |
23 | #include <sys/types.h> | |
24 | #include <dirent.h> | |
25 | #include <string.h> | |
26 | #include <glib.h> | |
27 | #include <libsigrok/libsigrok.h> | |
28 | #include "libsigrok-internal.h" | |
29 | ||
30 | /** @cond PRIVATE */ | |
31 | #define LOG_PREFIX "hwdriver" | |
32 | /** @endcond */ | |
33 | ||
34 | /** | |
35 | * @file | |
36 | * | |
37 | * Hardware driver handling in libsigrok. | |
38 | */ | |
39 | ||
40 | /** | |
41 | * @defgroup grp_driver Hardware drivers | |
42 | * | |
43 | * Hardware driver handling in libsigrok. | |
44 | * | |
45 | * @{ | |
46 | */ | |
47 | ||
48 | /* Please use the same order/grouping as in enum sr_configkey (libsigrok.h). */ | |
49 | static struct sr_key_info sr_key_info_config[] = { | |
50 | /* Device classes */ | |
51 | {SR_CONF_LOGIC_ANALYZER, SR_T_STRING, NULL, "Logic analyzer", NULL}, | |
52 | {SR_CONF_OSCILLOSCOPE, SR_T_STRING, NULL, "Oscilloscope", NULL}, | |
53 | {SR_CONF_MULTIMETER, SR_T_STRING, NULL, "Multimeter", NULL}, | |
54 | {SR_CONF_DEMO_DEV, SR_T_STRING, NULL, "Demo device", NULL}, | |
55 | {SR_CONF_SOUNDLEVELMETER, SR_T_STRING, NULL, "Sound level meter", NULL}, | |
56 | {SR_CONF_THERMOMETER, SR_T_STRING, NULL, "Thermometer", NULL}, | |
57 | {SR_CONF_HYGROMETER, SR_T_STRING, NULL, "Hygrometer", NULL}, | |
58 | {SR_CONF_ENERGYMETER, SR_T_STRING, NULL, "Energy meter", NULL}, | |
59 | {SR_CONF_DEMODULATOR, SR_T_STRING, NULL, "Demodulator", NULL}, | |
60 | {SR_CONF_POWER_SUPPLY, SR_T_STRING, NULL, "Power supply", NULL}, | |
61 | {SR_CONF_LCRMETER, SR_T_STRING, NULL, "LCR meter", NULL}, | |
62 | {SR_CONF_ELECTRONIC_LOAD, SR_T_STRING, NULL, "Electronic load", NULL}, | |
63 | {SR_CONF_SCALE, SR_T_STRING, NULL, "Scale", NULL}, | |
64 | ||
65 | /* Driver scan options */ | |
66 | {SR_CONF_CONN, SR_T_STRING, "conn", | |
67 | "Connection", NULL}, | |
68 | {SR_CONF_SERIALCOMM, SR_T_STRING, "serialcomm", | |
69 | "Serial communication", NULL}, | |
70 | {SR_CONF_MODBUSADDR, SR_T_UINT64, "modbusaddr", | |
71 | "Modbus slave address", NULL}, | |
72 | ||
73 | /* Device (or channel group) configuration */ | |
74 | {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate", | |
75 | "Sample rate", NULL}, | |
76 | {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio", | |
77 | "Pre-trigger capture ratio", NULL}, | |
78 | {SR_CONF_PATTERN_MODE, SR_T_STRING, "pattern", | |
79 | "Pattern", NULL}, | |
80 | {SR_CONF_RLE, SR_T_BOOL, "rle", | |
81 | "Run length encoding", NULL}, | |
82 | {SR_CONF_TRIGGER_SLOPE, SR_T_STRING, "triggerslope", | |
83 | "Trigger slope", NULL}, | |
84 | {SR_CONF_AVERAGING, SR_T_BOOL, "averaging", | |
85 | "Averaging", NULL}, | |
86 | {SR_CONF_AVG_SAMPLES, SR_T_UINT64, "avg_samples", | |
87 | "Number of samples to average over", NULL}, | |
88 | {SR_CONF_TRIGGER_SOURCE, SR_T_STRING, "triggersource", | |
89 | "Trigger source", NULL}, | |
90 | {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos", | |
91 | "Horizontal trigger position", NULL}, | |
92 | {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize", | |
93 | "Buffer size", NULL}, | |
94 | {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase", | |
95 | "Time base", NULL}, | |
96 | {SR_CONF_FILTER, SR_T_BOOL, "filter", | |
97 | "Filter", NULL}, | |
98 | {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv", | |
99 | "Volts/div", NULL}, | |
100 | {SR_CONF_COUPLING, SR_T_STRING, "coupling", | |
101 | "Coupling", NULL}, | |
102 | {SR_CONF_TRIGGER_MATCH, SR_T_INT32, "triggermatch", | |
103 | "Trigger matches", NULL}, | |
104 | {SR_CONF_SAMPLE_INTERVAL, SR_T_UINT64, "sample_interval", | |
105 | "Sample interval", NULL}, | |
106 | {SR_CONF_NUM_HDIV, SR_T_INT32, "num_hdiv", | |
107 | "Number of horizontal divisions", NULL}, | |
108 | {SR_CONF_NUM_VDIV, SR_T_INT32, "num_vdiv", | |
109 | "Number of vertical divisions", NULL}, | |
110 | {SR_CONF_SPL_WEIGHT_FREQ, SR_T_STRING, "spl_weight_freq", | |
111 | "Sound pressure level frequency weighting", NULL}, | |
112 | {SR_CONF_SPL_WEIGHT_TIME, SR_T_STRING, "spl_weight_time", | |
113 | "Sound pressure level time weighting", NULL}, | |
114 | {SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range", | |
115 | "Sound pressure level measurement range", NULL}, | |
116 | {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max", | |
117 | "Hold max", NULL}, | |
118 | {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min", | |
119 | "Hold min", NULL}, | |
120 | {SR_CONF_VOLTAGE_THRESHOLD, SR_T_DOUBLE_RANGE, "voltage_threshold", | |
121 | "Voltage threshold", NULL }, | |
122 | {SR_CONF_EXTERNAL_CLOCK, SR_T_BOOL, "external_clock", | |
123 | "External clock mode", NULL}, | |
124 | {SR_CONF_SWAP, SR_T_BOOL, "swap", | |
125 | "Swap channel order", NULL}, | |
126 | {SR_CONF_CENTER_FREQUENCY, SR_T_UINT64, "center_frequency", | |
127 | "Center frequency", NULL}, | |
128 | {SR_CONF_NUM_LOGIC_CHANNELS, SR_T_INT32, "logic_channels", | |
129 | "Number of logic channels", NULL}, | |
130 | {SR_CONF_NUM_ANALOG_CHANNELS, SR_T_INT32, "analog_channels", | |
131 | "Number of analog channels", NULL}, | |
132 | {SR_CONF_VOLTAGE, SR_T_FLOAT, "voltage", | |
133 | "Current voltage", NULL}, | |
134 | {SR_CONF_VOLTAGE_TARGET, SR_T_FLOAT, "voltage_target", | |
135 | "Voltage target", NULL}, | |
136 | {SR_CONF_CURRENT, SR_T_FLOAT, "current", | |
137 | "Current current", NULL}, | |
138 | {SR_CONF_CURRENT_LIMIT, SR_T_FLOAT, "current_limit", | |
139 | "Current limit", NULL}, | |
140 | {SR_CONF_ENABLED, SR_T_BOOL, "enabled", | |
141 | "Channel enabled", NULL}, | |
142 | {SR_CONF_CHANNEL_CONFIG, SR_T_STRING, "channel_config", | |
143 | "Channel modes", NULL}, | |
144 | {SR_CONF_OVER_VOLTAGE_PROTECTION_ENABLED, SR_T_BOOL, "ovp_enabled", | |
145 | "Over-voltage protection enabled", NULL}, | |
146 | {SR_CONF_OVER_VOLTAGE_PROTECTION_ACTIVE, SR_T_BOOL, "ovp_active", | |
147 | "Over-voltage protection active", NULL}, | |
148 | {SR_CONF_OVER_VOLTAGE_PROTECTION_THRESHOLD, SR_T_FLOAT, "ovp_threshold", | |
149 | "Over-voltage protection threshold", NULL}, | |
150 | {SR_CONF_OVER_CURRENT_PROTECTION_ENABLED, SR_T_BOOL, "ocp_enabled", | |
151 | "Over-current protection enabled", NULL}, | |
152 | {SR_CONF_OVER_CURRENT_PROTECTION_ACTIVE, SR_T_BOOL, "ocp_active", | |
153 | "Over-current protection active", NULL}, | |
154 | {SR_CONF_OVER_CURRENT_PROTECTION_THRESHOLD, SR_T_FLOAT, "ocp_threshold", | |
155 | "Over-current protection threshold", NULL}, | |
156 | {SR_CONF_CLOCK_EDGE, SR_T_STRING, "clock_edge", | |
157 | "Clock edge", NULL}, | |
158 | {SR_CONF_AMPLITUDE, SR_T_FLOAT, "amplitude", | |
159 | "Amplitude", NULL}, | |
160 | {SR_CONF_REGULATION, SR_T_STRING, "regulation", | |
161 | "Channel regulation", NULL}, | |
162 | {SR_CONF_OVER_TEMPERATURE_PROTECTION, SR_T_BOOL, "otp", | |
163 | "Over-temperature protection", NULL}, | |
164 | {SR_CONF_OUTPUT_FREQUENCY, SR_T_FLOAT, "output_frequency", | |
165 | "Output frequency", NULL}, | |
166 | {SR_CONF_OUTPUT_FREQUENCY_TARGET, SR_T_FLOAT, "output_frequency_target", | |
167 | "Output frequency target", NULL}, | |
168 | {SR_CONF_MEASURED_QUANTITY, SR_T_MQ, "measured_quantity", | |
169 | "Measured quantity", NULL}, | |
170 | {SR_CONF_EQUIV_CIRCUIT_MODEL, SR_T_STRING, "equiv_circuit_model", | |
171 | "Equivalent circuit model", NULL}, | |
172 | {SR_CONF_OVER_TEMPERATURE_PROTECTION_ACTIVE, SR_T_BOOL, "otp_active", | |
173 | "Over-temperature protection active", NULL}, | |
174 | ||
175 | /* Special stuff */ | |
176 | {SR_CONF_SESSIONFILE, SR_T_STRING, "sessionfile", | |
177 | "Session file", NULL}, | |
178 | {SR_CONF_CAPTUREFILE, SR_T_STRING, "capturefile", | |
179 | "Capture file", NULL}, | |
180 | {SR_CONF_CAPTURE_UNITSIZE, SR_T_UINT64, "capture_unitsize", | |
181 | "Capture unitsize", NULL}, | |
182 | {SR_CONF_POWER_OFF, SR_T_BOOL, "power_off", | |
183 | "Power off", NULL}, | |
184 | {SR_CONF_DATA_SOURCE, SR_T_STRING, "data_source", | |
185 | "Data source", NULL}, | |
186 | {SR_CONF_PROBE_FACTOR, SR_T_UINT64, "probe_factor", | |
187 | "Probe factor", NULL}, | |
188 | ||
189 | /* Acquisition modes, sample limiting */ | |
190 | {SR_CONF_LIMIT_MSEC, SR_T_UINT64, "limit_time", | |
191 | "Time limit", NULL}, | |
192 | {SR_CONF_LIMIT_SAMPLES, SR_T_UINT64, "limit_samples", | |
193 | "Sample limit", NULL}, | |
194 | {SR_CONF_LIMIT_FRAMES, SR_T_UINT64, "limit_frames", | |
195 | "Frame limit", NULL}, | |
196 | {SR_CONF_CONTINUOUS, SR_T_UINT64, "continuous", | |
197 | "Continuous sampling", NULL}, | |
198 | {SR_CONF_DATALOG, SR_T_BOOL, "datalog", | |
199 | "Datalog", NULL}, | |
200 | {SR_CONF_DEVICE_MODE, SR_T_STRING, "device_mode", | |
201 | "Device mode", NULL}, | |
202 | {SR_CONF_TEST_MODE, SR_T_STRING, "test_mode", | |
203 | "Test mode", NULL}, | |
204 | ||
205 | ALL_ZERO | |
206 | }; | |
207 | ||
208 | /* Please use the same order as in enum sr_mq (libsigrok.h). */ | |
209 | static struct sr_key_info sr_key_info_mq[] = { | |
210 | {SR_MQ_VOLTAGE, 0, "voltage", "Voltage", NULL}, | |
211 | {SR_MQ_CURRENT, 0, "current", "Current", NULL}, | |
212 | {SR_MQ_RESISTANCE, 0, "resistance", "Resistance", NULL}, | |
213 | {SR_MQ_CAPACITANCE, 0, "capacitance", "Capacitance", NULL}, | |
214 | {SR_MQ_TEMPERATURE, 0, "temperature", "Temperature", NULL}, | |
215 | {SR_MQ_FREQUENCY, 0, "frequency", "Frequency", NULL}, | |
216 | {SR_MQ_DUTY_CYCLE, 0, "duty_cycle", "Duty cycle", NULL}, | |
217 | {SR_MQ_CONTINUITY, 0, "continuity", "Continuity", NULL}, | |
218 | {SR_MQ_PULSE_WIDTH, 0, "pulse_width", "Pulse width", NULL}, | |
219 | {SR_MQ_CONDUCTANCE, 0, "conductance", "Conductance", NULL}, | |
220 | {SR_MQ_POWER, 0, "power", "Power", NULL}, | |
221 | {SR_MQ_GAIN, 0, "gain", "Gain", NULL}, | |
222 | {SR_MQ_SOUND_PRESSURE_LEVEL, 0, "spl", "Sound pressure level", NULL}, | |
223 | {SR_MQ_CARBON_MONOXIDE, 0, "co", "Carbon monoxide", NULL}, | |
224 | {SR_MQ_RELATIVE_HUMIDITY, 0, "rh", "Relative humidity", NULL}, | |
225 | {SR_MQ_TIME, 0, "time", "Time", NULL}, | |
226 | {SR_MQ_WIND_SPEED, 0, "wind_speed", "Wind speed", NULL}, | |
227 | {SR_MQ_PRESSURE, 0, "pressure", "Pressure", NULL}, | |
228 | {SR_MQ_PARALLEL_INDUCTANCE, 0, "parallel_inductance", "Parallel inductance", NULL}, | |
229 | {SR_MQ_PARALLEL_CAPACITANCE, 0, "parallel_capacitance", "Parallel capacitance", NULL}, | |
230 | {SR_MQ_PARALLEL_RESISTANCE, 0, "parallel_resistance", "Parallel resistance", NULL}, | |
231 | {SR_MQ_SERIES_INDUCTANCE, 0, "series_inductance", "Series inductance", NULL}, | |
232 | {SR_MQ_SERIES_CAPACITANCE, 0, "series_capacitance", "Series capacitance", NULL}, | |
233 | {SR_MQ_SERIES_RESISTANCE, 0, "series_resistance", "Series resistance", NULL}, | |
234 | {SR_MQ_DISSIPATION_FACTOR, 0, "dissipation_factor", "Dissipation factor", NULL}, | |
235 | {SR_MQ_QUALITY_FACTOR, 0, "quality_factor", "Quality factor", NULL}, | |
236 | {SR_MQ_PHASE_ANGLE, 0, "phase_angle", "Phase angle", NULL}, | |
237 | {SR_MQ_DIFFERENCE, 0, "difference", "Difference", NULL}, | |
238 | {SR_MQ_COUNT, 0, "count", "Count", NULL}, | |
239 | {SR_MQ_POWER_FACTOR, 0, "power_factor", "Power factor", NULL}, | |
240 | {SR_MQ_APPARENT_POWER, 0, "apparent_power", "Apparent power", NULL}, | |
241 | {SR_MQ_MASS, 0, "mass", "Mass", NULL}, | |
242 | ALL_ZERO | |
243 | }; | |
244 | ||
245 | /* Please use the same order as in enum sr_mqflag (libsigrok.h). */ | |
246 | static struct sr_key_info sr_key_info_mqflag[] = { | |
247 | {SR_MQFLAG_AC, 0, "ac", "AC", NULL}, | |
248 | {SR_MQFLAG_DC, 0, "dc", "DC", NULL}, | |
249 | {SR_MQFLAG_RMS, 0, "rms", "RMS", NULL}, | |
250 | {SR_MQFLAG_DIODE, 0, "diode", "Diode", NULL}, | |
251 | {SR_MQFLAG_HOLD, 0, "hold", "Hold", NULL}, | |
252 | {SR_MQFLAG_MAX, 0, "max", "Max", NULL}, | |
253 | {SR_MQFLAG_MIN, 0, "min", "Min", NULL}, | |
254 | {SR_MQFLAG_AUTORANGE, 0, "auto_range", "Auto range", NULL}, | |
255 | {SR_MQFLAG_RELATIVE, 0, "relative", "Relative", NULL}, | |
256 | {SR_MQFLAG_SPL_FREQ_WEIGHT_A, 0, "spl_freq_weight_a", | |
257 | "Frequency weighted (A)", NULL}, | |
258 | {SR_MQFLAG_SPL_FREQ_WEIGHT_C, 0, "spl_freq_weight_c", | |
259 | "Frequency weighted (C)", NULL}, | |
260 | {SR_MQFLAG_SPL_FREQ_WEIGHT_Z, 0, "spl_freq_weight_z", | |
261 | "Frequency weighted (Z)", NULL}, | |
262 | {SR_MQFLAG_SPL_FREQ_WEIGHT_FLAT, 0, "spl_freq_weight_flat", | |
263 | "Frequency weighted (flat)", NULL}, | |
264 | {SR_MQFLAG_SPL_TIME_WEIGHT_S, 0, "spl_time_weight_s", | |
265 | "Time weighted (S)", NULL}, | |
266 | {SR_MQFLAG_SPL_TIME_WEIGHT_F, 0, "spl_time_weight_f", | |
267 | "Time weighted (F)", NULL}, | |
268 | {SR_MQFLAG_SPL_LAT, 0, "spl_time_average", "Time-averaged (LEQ)", NULL}, | |
269 | {SR_MQFLAG_SPL_PCT_OVER_ALARM, 0, "spl_pct_over_alarm", | |
270 | "Percentage over alarm", NULL}, | |
271 | {SR_MQFLAG_DURATION, 0, "duration", "Duration", NULL}, | |
272 | {SR_MQFLAG_AVG, 0, "average", "Average", NULL}, | |
273 | {SR_MQFLAG_REFERENCE, 0, "reference", "Reference", NULL}, | |
274 | {SR_MQFLAG_UNSTABLE, 0, "unstable", "Unstable", NULL}, | |
275 | ALL_ZERO | |
276 | }; | |
277 | ||
278 | /* This must handle all the keys from enum sr_datatype (libsigrok.h). */ | |
279 | SR_PRIV const GVariantType *sr_variant_type_get(int datatype) | |
280 | { | |
281 | switch (datatype) { | |
282 | case SR_T_INT32: | |
283 | return G_VARIANT_TYPE_INT32; | |
284 | case SR_T_UINT64: | |
285 | return G_VARIANT_TYPE_UINT64; | |
286 | case SR_T_STRING: | |
287 | return G_VARIANT_TYPE_STRING; | |
288 | case SR_T_BOOL: | |
289 | return G_VARIANT_TYPE_BOOLEAN; | |
290 | case SR_T_FLOAT: | |
291 | return G_VARIANT_TYPE_DOUBLE; | |
292 | case SR_T_RATIONAL_PERIOD: | |
293 | case SR_T_RATIONAL_VOLT: | |
294 | case SR_T_UINT64_RANGE: | |
295 | case SR_T_DOUBLE_RANGE: | |
296 | return G_VARIANT_TYPE_TUPLE; | |
297 | case SR_T_KEYVALUE: | |
298 | return G_VARIANT_TYPE_DICTIONARY; | |
299 | case SR_T_MQ: | |
300 | return G_VARIANT_TYPE_TUPLE; | |
301 | default: | |
302 | return NULL; | |
303 | } | |
304 | } | |
305 | ||
306 | SR_PRIV int sr_variant_type_check(uint32_t key, GVariant *value) | |
307 | { | |
308 | const struct sr_key_info *info; | |
309 | const GVariantType *type, *expected; | |
310 | char *expected_string, *type_string; | |
311 | ||
312 | info = sr_key_info_get(SR_KEY_CONFIG, key); | |
313 | if (!info) | |
314 | return SR_OK; | |
315 | ||
316 | expected = sr_variant_type_get(info->datatype); | |
317 | type = g_variant_get_type(value); | |
318 | if (!g_variant_type_equal(type, expected) | |
319 | && !g_variant_type_is_subtype_of(type, expected)) { | |
320 | expected_string = g_variant_type_dup_string(expected); | |
321 | type_string = g_variant_type_dup_string(type); | |
322 | sr_err("Wrong variant type for key '%s': expected '%s', got '%s'", | |
323 | info->name, expected_string, type_string); | |
324 | g_free(expected_string); | |
325 | g_free(type_string); | |
326 | return SR_ERR_ARG; | |
327 | } | |
328 | ||
329 | return SR_OK; | |
330 | } | |
331 | ||
332 | /** | |
333 | * Return the list of supported hardware drivers. | |
334 | * | |
335 | * @param[in] ctx Pointer to a libsigrok context struct. Must not be NULL. | |
336 | * | |
337 | * @retval NULL The ctx argument was NULL, or there are no supported drivers. | |
338 | * @retval Other Pointer to the NULL-terminated list of hardware drivers. | |
339 | * The user should NOT g_free() this list, sr_exit() will do that. | |
340 | * | |
341 | * @since 0.4.0 | |
342 | */ | |
343 | SR_API struct sr_dev_driver **sr_driver_list(const struct sr_context *ctx) | |
344 | { | |
345 | if (!ctx) | |
346 | return NULL; | |
347 | ||
348 | return ctx->driver_list; | |
349 | } | |
350 | ||
351 | /** | |
352 | * Initialize a hardware driver. | |
353 | * | |
354 | * This usually involves memory allocations and variable initializations | |
355 | * within the driver, but _not_ scanning for attached devices. | |
356 | * The API call sr_driver_scan() is used for that. | |
357 | * | |
358 | * @param ctx A libsigrok context object allocated by a previous call to | |
359 | * sr_init(). Must not be NULL. | |
360 | * @param driver The driver to initialize. This must be a pointer to one of | |
361 | * the entries returned by sr_driver_list(). Must not be NULL. | |
362 | * | |
363 | * @retval SR_OK Success | |
364 | * @retval SR_ERR_ARG Invalid parameter(s). | |
365 | * @retval SR_ERR_BUG Internal errors. | |
366 | * @retval other Another negative error code upon other errors. | |
367 | * | |
368 | * @since 0.2.0 | |
369 | */ | |
370 | SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver) | |
371 | { | |
372 | int ret; | |
373 | ||
374 | if (!ctx) { | |
375 | sr_err("Invalid libsigrok context, can't initialize."); | |
376 | return SR_ERR_ARG; | |
377 | } | |
378 | ||
379 | if (!driver) { | |
380 | sr_err("Invalid driver, can't initialize."); | |
381 | return SR_ERR_ARG; | |
382 | } | |
383 | ||
384 | sr_spew("Initializing driver '%s'.", driver->name); | |
385 | if ((ret = driver->init(driver, ctx)) < 0) | |
386 | sr_err("Failed to initialize the driver: %d.", ret); | |
387 | ||
388 | return ret; | |
389 | } | |
390 | ||
391 | /** | |
392 | * Enumerate scan options supported by this driver. | |
393 | * | |
394 | * Before calling sr_driver_scan_options_list(), the user must have previously | |
395 | * initialized the driver by calling sr_driver_init(). | |
396 | * | |
397 | * @param driver The driver to enumerate options for. This must be a pointer | |
398 | * to one of the entries returned by sr_driver_list(). Must not | |
399 | * be NULL. | |
400 | * | |
401 | * @return A GArray * of uint32_t entries, or NULL on invalid arguments. Each | |
402 | * entry is a configuration key that is supported as a scan option. | |
403 | * The array must be freed by the caller using g_array_free(). | |
404 | * | |
405 | * @since 0.4.0 | |
406 | */ | |
407 | SR_API GArray *sr_driver_scan_options_list(const struct sr_dev_driver *driver) | |
408 | { | |
409 | GVariant *gvar; | |
410 | const uint32_t *opts; | |
411 | gsize num_opts; | |
412 | GArray *result; | |
413 | ||
414 | if (sr_config_list(driver, NULL, NULL, SR_CONF_SCAN_OPTIONS, &gvar) != SR_OK) | |
415 | return NULL; | |
416 | ||
417 | opts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(uint32_t)); | |
418 | ||
419 | result = g_array_sized_new(FALSE, FALSE, sizeof(uint32_t), num_opts); | |
420 | ||
421 | g_array_insert_vals(result, 0, opts, num_opts); | |
422 | ||
423 | g_variant_unref(gvar); | |
424 | ||
425 | return result; | |
426 | } | |
427 | ||
428 | static int check_options(struct sr_dev_driver *driver, GSList *options, | |
429 | uint32_t optlist_key, struct sr_dev_inst *sdi, | |
430 | struct sr_channel_group *cg) | |
431 | { | |
432 | struct sr_config *src; | |
433 | const struct sr_key_info *srci; | |
434 | GVariant *gvar_opts; | |
435 | GSList *l; | |
436 | const uint32_t *opts; | |
437 | gsize num_opts, i; | |
438 | int ret; | |
439 | ||
440 | if (sr_config_list(driver, sdi, cg, optlist_key, &gvar_opts) != SR_OK) { | |
441 | /* Driver publishes no options for this optlist. */ | |
442 | return SR_ERR; | |
443 | } | |
444 | ||
445 | ret = SR_OK; | |
446 | opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t)); | |
447 | for (l = options; l; l = l->next) { | |
448 | src = l->data; | |
449 | for (i = 0; i < num_opts; i++) { | |
450 | if (opts[i] == src->key) | |
451 | break; | |
452 | } | |
453 | if (i == num_opts) { | |
454 | if (!(srci = sr_key_info_get(SR_KEY_CONFIG, src->key))) | |
455 | /* Shouldn't happen. */ | |
456 | sr_err("Invalid option %d.", src->key); | |
457 | else | |
458 | sr_err("Invalid option '%s'.", srci->id); | |
459 | ret = SR_ERR_ARG; | |
460 | break; | |
461 | } | |
462 | if (sr_variant_type_check(src->key, src->data) != SR_OK) { | |
463 | ret = SR_ERR_ARG; | |
464 | break; | |
465 | } | |
466 | } | |
467 | g_variant_unref(gvar_opts); | |
468 | ||
469 | return ret; | |
470 | } | |
471 | ||
472 | /** | |
473 | * Tell a hardware driver to scan for devices. | |
474 | * | |
475 | * In addition to the detection, the devices that are found are also | |
476 | * initialized automatically. On some devices, this involves a firmware upload, | |
477 | * or other such measures. | |
478 | * | |
479 | * The order in which the system is scanned for devices is not specified. The | |
480 | * caller should not assume or rely on any specific order. | |
481 | * | |
482 | * Before calling sr_driver_scan(), the user must have previously initialized | |
483 | * the driver by calling sr_driver_init(). | |
484 | * | |
485 | * @param driver The driver that should scan. This must be a pointer to one of | |
486 | * the entries returned by sr_driver_list(). Must not be NULL. | |
487 | * @param options A list of 'struct sr_hwopt' options to pass to the driver's | |
488 | * scanner. Can be NULL/empty. | |
489 | * | |
490 | * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were | |
491 | * found (or errors were encountered). This list must be freed by the | |
492 | * caller using g_slist_free(), but without freeing the data pointed | |
493 | * to in the list. | |
494 | * | |
495 | * @since 0.2.0 | |
496 | */ | |
497 | SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options) | |
498 | { | |
499 | GSList *l; | |
500 | ||
501 | if (!driver) { | |
502 | sr_err("Invalid driver, can't scan for devices."); | |
503 | return NULL; | |
504 | } | |
505 | ||
506 | if (!driver->context) { | |
507 | sr_err("Driver not initialized, can't scan for devices."); | |
508 | return NULL; | |
509 | } | |
510 | ||
511 | if (options) { | |
512 | if (check_options(driver, options, SR_CONF_SCAN_OPTIONS, NULL, NULL) != SR_OK) | |
513 | return NULL; | |
514 | } | |
515 | ||
516 | l = driver->scan(driver, options); | |
517 | ||
518 | sr_spew("Scan of '%s' found %d devices.", driver->name, | |
519 | g_slist_length(l)); | |
520 | ||
521 | return l; | |
522 | } | |
523 | ||
524 | /** | |
525 | * Call driver cleanup function for all drivers. | |
526 | * | |
527 | * @param[in] ctx Pointer to a libsigrok context struct. Must not be NULL. | |
528 | * | |
529 | * @private | |
530 | */ | |
531 | SR_PRIV void sr_hw_cleanup_all(const struct sr_context *ctx) | |
532 | { | |
533 | int i; | |
534 | struct sr_dev_driver **drivers; | |
535 | ||
536 | if (!ctx) | |
537 | return; | |
538 | ||
539 | drivers = sr_driver_list(ctx); | |
540 | for (i = 0; drivers[i]; i++) { | |
541 | if (drivers[i]->cleanup) | |
542 | drivers[i]->cleanup(drivers[i]); | |
543 | drivers[i]->context = NULL; | |
544 | } | |
545 | } | |
546 | ||
547 | /** Allocate struct sr_config. | |
548 | * A floating reference can be passed in for data. | |
549 | * @private | |
550 | */ | |
551 | SR_PRIV struct sr_config *sr_config_new(uint32_t key, GVariant *data) | |
552 | { | |
553 | struct sr_config *src; | |
554 | ||
555 | src = g_malloc0(sizeof(struct sr_config)); | |
556 | src->key = key; | |
557 | src->data = g_variant_ref_sink(data); | |
558 | ||
559 | return src; | |
560 | } | |
561 | ||
562 | /** Free struct sr_config. | |
563 | * @private | |
564 | */ | |
565 | SR_PRIV void sr_config_free(struct sr_config *src) | |
566 | { | |
567 | ||
568 | if (!src || !src->data) { | |
569 | sr_err("%s: invalid data!", __func__); | |
570 | return; | |
571 | } | |
572 | ||
573 | g_variant_unref(src->data); | |
574 | g_free(src); | |
575 | ||
576 | } | |
577 | ||
578 | static void log_key(const struct sr_dev_inst *sdi, | |
579 | const struct sr_channel_group *cg, uint32_t key, int op, GVariant *data) | |
580 | { | |
581 | const char *opstr; | |
582 | const struct sr_key_info *srci; | |
583 | ||
584 | /* Don't log SR_CONF_DEVICE_OPTIONS, it's verbose and not too useful. */ | |
585 | if (key == SR_CONF_DEVICE_OPTIONS) | |
586 | return; | |
587 | ||
588 | opstr = op == SR_CONF_GET ? "get" : op == SR_CONF_SET ? "set" : "list"; | |
589 | srci = sr_key_info_get(SR_KEY_CONFIG, key); | |
590 | ||
591 | sr_spew("sr_config_%s(): key %d (%s) sdi %p cg %s -> %s", opstr, key, | |
592 | srci ? srci->id : "NULL", sdi, cg ? cg->name : "NULL", | |
593 | data ? g_variant_print(data, TRUE) : "NULL"); | |
594 | } | |
595 | ||
596 | static int check_key(const struct sr_dev_driver *driver, | |
597 | const struct sr_dev_inst *sdi, const struct sr_channel_group *cg, | |
598 | uint32_t key, int op, GVariant *data) | |
599 | { | |
600 | const struct sr_key_info *srci; | |
601 | gsize num_opts, i; | |
602 | GVariant *gvar_opts; | |
603 | const uint32_t *opts; | |
604 | uint32_t pub_opt; | |
605 | const char *suffix; | |
606 | const char *opstr; | |
607 | ||
608 | if (sdi && cg) | |
609 | suffix = " for this device and channel group"; | |
610 | else if (sdi) | |
611 | suffix = " for this device"; | |
612 | else | |
613 | suffix = ""; | |
614 | ||
615 | if (!(srci = sr_key_info_get(SR_KEY_CONFIG, key))) { | |
616 | sr_err("Invalid key %d.", key); | |
617 | return SR_ERR_ARG; | |
618 | } | |
619 | opstr = op == SR_CONF_GET ? "get" : op == SR_CONF_SET ? "set" : "list"; | |
620 | ||
621 | switch (key) { | |
622 | case SR_CONF_LIMIT_MSEC: | |
623 | case SR_CONF_LIMIT_SAMPLES: | |
624 | case SR_CONF_SAMPLERATE: | |
625 | /* Setting any of these to 0 is not useful. */ | |
626 | if (op != SR_CONF_SET || !data) | |
627 | break; | |
628 | if (g_variant_get_uint64(data) == 0) { | |
629 | sr_err("Cannot set '%s' to 0.", srci->id); | |
630 | return SR_ERR_ARG; | |
631 | } | |
632 | break; | |
633 | } | |
634 | ||
635 | if (sr_config_list(driver, sdi, cg, SR_CONF_DEVICE_OPTIONS, &gvar_opts) != SR_OK) { | |
636 | /* Driver publishes no options. */ | |
637 | sr_err("No options available%s.", suffix); | |
638 | return SR_ERR_ARG; | |
639 | } | |
640 | opts = g_variant_get_fixed_array(gvar_opts, &num_opts, sizeof(uint32_t)); | |
641 | pub_opt = 0; | |
642 | for (i = 0; i < num_opts; i++) { | |
643 | if ((opts[i] & SR_CONF_MASK) == key) { | |
644 | pub_opt = opts[i]; | |
645 | break; | |
646 | } | |
647 | } | |
648 | g_variant_unref(gvar_opts); | |
649 | if (!pub_opt) { | |
650 | sr_err("Option '%s' not available%s.", srci->id, suffix); | |
651 | return SR_ERR_ARG; | |
652 | } | |
653 | ||
654 | if (!(pub_opt & op)) { | |
655 | sr_err("Option '%s' not available to %s%s.", srci->id, opstr, suffix); | |
656 | return SR_ERR_ARG; | |
657 | } | |
658 | ||
659 | return SR_OK; | |
660 | } | |
661 | ||
662 | /** | |
663 | * Query value of a configuration key at the given driver or device instance. | |
664 | * | |
665 | * @param[in] driver The sr_dev_driver struct to query. | |
666 | * @param[in] sdi (optional) If the key is specific to a device, this must | |
667 | * contain a pointer to the struct sr_dev_inst to be checked. | |
668 | * Otherwise it must be NULL. | |
669 | * @param[in] cg The channel group on the device for which to list the | |
670 | * values, or NULL. | |
671 | * @param[in] key The configuration key (SR_CONF_*). | |
672 | * @param[in,out] data Pointer to a GVariant where the value will be stored. | |
673 | * Must not be NULL. The caller is given ownership of the GVariant | |
674 | * and must thus decrease the refcount after use. However if | |
675 | * this function returns an error code, the field should be | |
676 | * considered unused, and should not be unreferenced. | |
677 | * | |
678 | * @retval SR_OK Success. | |
679 | * @retval SR_ERR Error. | |
680 | * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be | |
681 | * interpreted as an error by the caller; merely as an indication | |
682 | * that it's not applicable. | |
683 | * | |
684 | * @since 0.3.0 | |
685 | */ | |
686 | SR_API int sr_config_get(const struct sr_dev_driver *driver, | |
687 | const struct sr_dev_inst *sdi, | |
688 | const struct sr_channel_group *cg, | |
689 | uint32_t key, GVariant **data) | |
690 | { | |
691 | int ret; | |
692 | ||
693 | if (!driver || !data) | |
694 | return SR_ERR; | |
695 | ||
696 | if (!driver->config_get) | |
697 | return SR_ERR_ARG; | |
698 | ||
699 | if (check_key(driver, sdi, cg, key, SR_CONF_GET, NULL) != SR_OK) | |
700 | return SR_ERR_ARG; | |
701 | ||
702 | if ((ret = driver->config_get(key, data, sdi, cg)) == SR_OK) { | |
703 | log_key(sdi, cg, key, SR_CONF_GET, *data); | |
704 | /* Got a floating reference from the driver. Sink it here, | |
705 | * caller will need to unref when done with it. */ | |
706 | g_variant_ref_sink(*data); | |
707 | } | |
708 | ||
709 | return ret; | |
710 | } | |
711 | ||
712 | /** | |
713 | * Set value of a configuration key in a device instance. | |
714 | * | |
715 | * @param[in] sdi The device instance. | |
716 | * @param[in] cg The channel group on the device for which to list the | |
717 | * values, or NULL. | |
718 | * @param[in] key The configuration key (SR_CONF_*). | |
719 | * @param data The new value for the key, as a GVariant with GVariantType | |
720 | * appropriate to that key. A floating reference can be passed | |
721 | * in; its refcount will be sunk and unreferenced after use. | |
722 | * | |
723 | * @retval SR_OK Success. | |
724 | * @retval SR_ERR Error. | |
725 | * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be | |
726 | * interpreted as an error by the caller; merely as an indication | |
727 | * that it's not applicable. | |
728 | * | |
729 | * @since 0.3.0 | |
730 | */ | |
731 | SR_API int sr_config_set(const struct sr_dev_inst *sdi, | |
732 | const struct sr_channel_group *cg, | |
733 | uint32_t key, GVariant *data) | |
734 | { | |
735 | int ret; | |
736 | ||
737 | g_variant_ref_sink(data); | |
738 | ||
739 | if (!sdi || !sdi->driver || !data) | |
740 | ret = SR_ERR; | |
741 | else if (!sdi->driver->config_set) | |
742 | ret = SR_ERR_ARG; | |
743 | else if (check_key(sdi->driver, sdi, cg, key, SR_CONF_SET, data) != SR_OK) | |
744 | return SR_ERR_ARG; | |
745 | else if ((ret = sr_variant_type_check(key, data)) == SR_OK) { | |
746 | log_key(sdi, cg, key, SR_CONF_SET, data); | |
747 | ret = sdi->driver->config_set(key, data, sdi, cg); | |
748 | } | |
749 | ||
750 | g_variant_unref(data); | |
751 | ||
752 | return ret; | |
753 | } | |
754 | ||
755 | /** | |
756 | * Apply configuration settings to the device hardware. | |
757 | * | |
758 | * @param sdi The device instance. | |
759 | * | |
760 | * @return SR_OK upon success or SR_ERR in case of error. | |
761 | * | |
762 | * @since 0.3.0 | |
763 | */ | |
764 | SR_API int sr_config_commit(const struct sr_dev_inst *sdi) | |
765 | { | |
766 | int ret; | |
767 | ||
768 | if (!sdi || !sdi->driver) | |
769 | ret = SR_ERR; | |
770 | else if (!sdi->driver->config_commit) | |
771 | ret = SR_OK; | |
772 | else | |
773 | ret = sdi->driver->config_commit(sdi); | |
774 | ||
775 | return ret; | |
776 | } | |
777 | ||
778 | /** | |
779 | * List all possible values for a configuration key. | |
780 | * | |
781 | * @param[in] driver The sr_dev_driver struct to query. | |
782 | * @param[in] sdi (optional) If the key is specific to a device, this must | |
783 | * contain a pointer to the struct sr_dev_inst to be checked. | |
784 | * @param[in] cg The channel group on the device for which to list the | |
785 | * values, or NULL. | |
786 | * @param[in] key The configuration key (SR_CONF_*). | |
787 | * @param[in,out] data A pointer to a GVariant where the list will be stored. | |
788 | * The caller is given ownership of the GVariant and must thus | |
789 | * unref the GVariant after use. However if this function | |
790 | * returns an error code, the field should be considered | |
791 | * unused, and should not be unreferenced. | |
792 | * | |
793 | * @retval SR_OK Success. | |
794 | * @retval SR_ERR Error. | |
795 | * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be | |
796 | * interpreted as an error by the caller; merely as an indication | |
797 | * that it's not applicable. | |
798 | * | |
799 | * @since 0.3.0 | |
800 | */ | |
801 | SR_API int sr_config_list(const struct sr_dev_driver *driver, | |
802 | const struct sr_dev_inst *sdi, | |
803 | const struct sr_channel_group *cg, | |
804 | uint32_t key, GVariant **data) | |
805 | { | |
806 | int ret; | |
807 | ||
808 | if (!driver || !data) | |
809 | return SR_ERR; | |
810 | else if (!driver->config_list) | |
811 | return SR_ERR_ARG; | |
812 | else if (key != SR_CONF_SCAN_OPTIONS && key != SR_CONF_DEVICE_OPTIONS) { | |
813 | if (check_key(driver, sdi, cg, key, SR_CONF_LIST, NULL) != SR_OK) | |
814 | return SR_ERR_ARG; | |
815 | } | |
816 | if ((ret = driver->config_list(key, data, sdi, cg)) == SR_OK) { | |
817 | log_key(sdi, cg, key, SR_CONF_LIST, *data); | |
818 | g_variant_ref_sink(*data); | |
819 | } | |
820 | ||
821 | return ret; | |
822 | } | |
823 | ||
824 | static struct sr_key_info *get_keytable(int keytype) | |
825 | { | |
826 | struct sr_key_info *table; | |
827 | ||
828 | switch (keytype) { | |
829 | case SR_KEY_CONFIG: | |
830 | table = sr_key_info_config; | |
831 | break; | |
832 | case SR_KEY_MQ: | |
833 | table = sr_key_info_mq; | |
834 | break; | |
835 | case SR_KEY_MQFLAGS: | |
836 | table = sr_key_info_mqflag; | |
837 | break; | |
838 | default: | |
839 | sr_err("Invalid keytype %d", keytype); | |
840 | return NULL; | |
841 | } | |
842 | ||
843 | return table; | |
844 | } | |
845 | ||
846 | /** | |
847 | * Get information about a key, by key. | |
848 | * | |
849 | * @param[in] keytype The namespace the key is in. | |
850 | * @param[in] key The key to find. | |
851 | * | |
852 | * @return A pointer to a struct sr_key_info, or NULL if the key | |
853 | * was not found. | |
854 | * | |
855 | * @since 0.3.0 | |
856 | */ | |
857 | SR_API const struct sr_key_info *sr_key_info_get(int keytype, uint32_t key) | |
858 | { | |
859 | struct sr_key_info *table; | |
860 | int i; | |
861 | ||
862 | if (!(table = get_keytable(keytype))) | |
863 | return NULL; | |
864 | ||
865 | for (i = 0; table[i].key; i++) { | |
866 | if (table[i].key == key) | |
867 | return &table[i]; | |
868 | } | |
869 | ||
870 | return NULL; | |
871 | } | |
872 | ||
873 | /** | |
874 | * Get information about a key, by name. | |
875 | * | |
876 | * @param[in] keytype The namespace the key is in. | |
877 | * @param[in] keyid The key id string. | |
878 | * | |
879 | * @return A pointer to a struct sr_key_info, or NULL if the key | |
880 | * was not found. | |
881 | * | |
882 | * @since 0.2.0 | |
883 | */ | |
884 | SR_API const struct sr_key_info *sr_key_info_name_get(int keytype, const char *keyid) | |
885 | { | |
886 | struct sr_key_info *table; | |
887 | int i; | |
888 | ||
889 | if (!(table = get_keytable(keytype))) | |
890 | return NULL; | |
891 | ||
892 | for (i = 0; table[i].key; i++) { | |
893 | if (!table[i].id) | |
894 | continue; | |
895 | if (!strcmp(table[i].id, keyid)) | |
896 | return &table[i]; | |
897 | } | |
898 | ||
899 | return NULL; | |
900 | } | |
901 | ||
902 | /** @} */ |