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_MAX, SR_T_FLOAT, "output_voltage_max",
110 "Maximum output voltage", NULL},
111 {SR_CONF_OUTPUT_CURRENT, SR_T_FLOAT, "output_current",
112 "Current output current", NULL},
113 {SR_CONF_OUTPUT_CURRENT_MAX, SR_T_FLOAT, "output_current_max",
114 "Maximum output current", NULL},
115 {SR_CONF_OUTPUT_ENABLED, SR_T_BOOL, "output_enabled",
116 "Output enabled", NULL},
117 {SR_CONF_OUTPUT_CHANNEL, SR_T_STRING, "output_channel",
118 "Output channel modes", NULL},
119 {SR_CONF_OVER_VOLTAGE_PROTECTION, SR_T_BOOL, "ovp",
120 "Over-voltage protection", NULL},
121 {SR_CONF_OVER_CURRENT_PROTECTION, SR_T_BOOL, "ocp",
122 "Over-current protection", NULL},
123 {SR_CONF_LIMIT_SAMPLES, SR_T_UINT64, "limit_samples",
124 "Sample limit", NULL},
125 {SR_CONF_CLOCK_EDGE, SR_T_STRING, "clock_edge",
127 {SR_CONF_AMPLITUDE, SR_T_FLOAT, "amplitude",
129 {0, 0, NULL, NULL, NULL},
133 * Return the list of supported hardware drivers.
135 * @return Pointer to the NULL-terminated list of hardware driver pointers.
139 SR_API struct sr_dev_driver **sr_driver_list(void)
146 * Initialize a hardware driver.
148 * This usually involves memory allocations and variable initializations
149 * within the driver, but _not_ scanning for attached devices.
150 * The API call sr_driver_scan() is used for that.
152 * @param ctx A libsigrok context object allocated by a previous call to
153 * sr_init(). Must not be NULL.
154 * @param driver The driver to initialize. This must be a pointer to one of
155 * the entries returned by sr_driver_list(). Must not be NULL.
157 * @retval SR_OK Success
158 * @retval SR_ERR_ARG Invalid parameter(s).
159 * @retval SR_ERR_BUG Internal errors.
160 * @retval other Another negative error code upon other errors.
164 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
169 sr_err("Invalid libsigrok context, can't initialize.");
174 sr_err("Invalid driver, can't initialize.");
178 sr_spew("Initializing driver '%s'.", driver->name);
179 if ((ret = driver->init(ctx)) < 0)
180 sr_err("Failed to initialize the driver: %d.", ret);
186 * Tell a hardware driver to scan for devices.
188 * In addition to the detection, the devices that are found are also
189 * initialized automatically. On some devices, this involves a firmware upload,
190 * or other such measures.
192 * The order in which the system is scanned for devices is not specified. The
193 * caller should not assume or rely on any specific order.
195 * Before calling sr_driver_scan(), the user must have previously initialized
196 * the driver by calling sr_driver_init().
198 * @param driver The driver that should scan. This must be a pointer to one of
199 * the entries returned by sr_driver_list(). Must not be NULL.
200 * @param options A list of 'struct sr_hwopt' options to pass to the driver's
201 * scanner. Can be NULL/empty.
203 * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
204 * found (or errors were encountered). This list must be freed by the
205 * caller using g_slist_free(), but without freeing the data pointed
210 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
215 sr_err("Invalid driver, can't scan for devices.");
220 sr_err("Driver not initialized, can't scan for devices.");
224 l = driver->scan(options);
226 sr_spew("Scan of '%s' found %d devices.", driver->name,
232 /** Call driver cleanup function for all drivers.
234 SR_PRIV void sr_hw_cleanup_all(void)
237 struct sr_dev_driver **drivers;
239 drivers = sr_driver_list();
240 for (i = 0; drivers[i]; i++) {
241 if (drivers[i]->cleanup)
242 drivers[i]->cleanup();
246 /** Allocate struct sr_config.
247 * A floating reference can be passed in for data.
250 SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
252 struct sr_config *src;
254 if (!(src = g_try_malloc(sizeof(struct sr_config))))
257 src->data = g_variant_ref_sink(data);
262 /** Free struct sr_config.
265 SR_PRIV void sr_config_free(struct sr_config *src)
268 if (!src || !src->data) {
269 sr_err("%s: invalid data!", __func__);
273 g_variant_unref(src->data);
279 * Query value of a configuration key at the given driver or device instance.
281 * @param[in] driver The sr_dev_driver struct to query.
282 * @param[in] sdi (optional) If the key is specific to a device, this must
283 * contain a pointer to the struct sr_dev_inst to be checked.
284 * Otherwise it must be NULL.
285 * @param[in] cg The channel group on the device for which to list the
287 * @param[in] key The configuration key (SR_CONF_*).
288 * @param[in,out] data Pointer to a GVariant where the value will be stored.
289 * Must not be NULL. The caller is given ownership of the GVariant
290 * and must thus decrease the refcount after use. However if
291 * this function returns an error code, the field should be
292 * considered unused, and should not be unreferenced.
294 * @retval SR_OK Success.
295 * @retval SR_ERR Error.
296 * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
297 * interpreted as an error by the caller; merely as an indication
298 * that it's not applicable.
302 SR_API int sr_config_get(const struct sr_dev_driver *driver,
303 const struct sr_dev_inst *sdi,
304 const struct sr_channel_group *cg,
305 int key, GVariant **data)
309 if (!driver || !data)
312 if (!driver->config_get)
315 if ((ret = driver->config_get(key, data, sdi, cg)) == SR_OK) {
316 /* Got a floating reference from the driver. Sink it here,
317 * caller will need to unref when done with it. */
318 g_variant_ref_sink(*data);
325 * Set value of a configuration key in a device instance.
327 * @param[in] sdi The device instance.
328 * @param[in] cg The channel group on the device for which to list the
330 * @param[in] key The configuration key (SR_CONF_*).
331 * @param data The new value for the key, as a GVariant with GVariantType
332 * appropriate to that key. A floating reference can be passed
333 * in; its refcount will be sunk and unreferenced after use.
335 * @retval SR_OK Success.
336 * @retval SR_ERR Error.
337 * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
338 * interpreted as an error by the caller; merely as an indication
339 * that it's not applicable.
343 SR_API int sr_config_set(const struct sr_dev_inst *sdi,
344 const struct sr_channel_group *cg,
345 int key, GVariant *data)
349 g_variant_ref_sink(data);
351 if (!sdi || !sdi->driver || !data)
353 else if (!sdi->driver->config_set)
356 ret = sdi->driver->config_set(key, data, sdi, cg);
358 g_variant_unref(data);
364 * Apply configuration settings to the device hardware.
366 * @param sdi The device instance.
368 * @return SR_OK upon success or SR_ERR in case of error.
372 SR_API int sr_config_commit(const struct sr_dev_inst *sdi)
376 if (!sdi || !sdi->driver)
378 else if (!sdi->driver->config_commit)
381 ret = sdi->driver->config_commit(sdi);
387 * List all possible values for a configuration key.
389 * @param[in] driver The sr_dev_driver struct to query.
390 * @param[in] sdi (optional) If the key is specific to a device, this must
391 * contain a pointer to the struct sr_dev_inst to be checked.
392 * @param[in] cg The channel group on the device for which to list the
394 * @param[in] key The configuration key (SR_CONF_*).
395 * @param[in,out] data A pointer to a GVariant where the list will be stored.
396 * The caller is given ownership of the GVariant and must thus
397 * unref the GVariant after use. However if this function
398 * returns an error code, the field should be considered
399 * unused, and should not be unreferenced.
401 * @retval SR_OK Success.
402 * @retval SR_ERR Error.
403 * @retval SR_ERR_ARG The driver doesn't know that key, but this is not to be
404 * interpreted as an error by the caller; merely as an indication
405 * that it's not applicable.
409 SR_API int sr_config_list(const struct sr_dev_driver *driver,
410 const struct sr_dev_inst *sdi,
411 const struct sr_channel_group *cg,
412 int key, GVariant **data)
416 if (!driver || !data)
418 else if (!driver->config_list)
420 else if ((ret = driver->config_list(key, data, sdi, cg)) == SR_OK)
421 g_variant_ref_sink(*data);
427 * Get information about a configuration key, by key.
429 * @param[in] key The configuration key.
431 * @return A pointer to a struct sr_config_info, or NULL if the key
436 SR_API const struct sr_config_info *sr_config_info_get(int key)
440 for (i = 0; sr_config_info_data[i].key; i++) {
441 if (sr_config_info_data[i].key == key)
442 return &sr_config_info_data[i];
449 * Get information about a configuration key, by name.
451 * @param[in] optname The configuration key.
453 * @return A pointer to a struct sr_config_info, or NULL if the key
458 SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
462 for (i = 0; sr_config_info_data[i].key; i++) {
463 if (!strcmp(sr_config_info_data[i].id, optname))
464 return &sr_config_info_data[i];