]> sigrok.org Git - libsigrok.git/blobdiff - hwdriver.c
Drop nexus-osciprime skeleton for now.
[libsigrok.git] / hwdriver.c
index bee5c022b22c2c291d17fa085cb3f11192046957..8b23aea388eff40935fb853fb3fa5b0bac557e86 100644 (file)
@@ -1,7 +1,7 @@
 /*
- * This file is part of the sigrok project.
+ * This file is part of the libsigrok project.
  *
- * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
+ * Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
 #include "libsigrok.h"
 #include "libsigrok-internal.h"
 
+/* Message logging helpers with subsystem-specific prefix string. */
+#define LOG_PREFIX "hwdriver: "
+#define sr_log(l, s, args...) sr_log(l, LOG_PREFIX s, ## args)
+#define sr_spew(s, args...) sr_spew(LOG_PREFIX s, ## args)
+#define sr_dbg(s, args...) sr_dbg(LOG_PREFIX s, ## args)
+#define sr_info(s, args...) sr_info(LOG_PREFIX s, ## args)
+#define sr_warn(s, args...) sr_warn(LOG_PREFIX s, ## args)
+#define sr_err(s, args...) sr_err(LOG_PREFIX s, ## args)
+
 /**
  * @file
  *
  * @{
  */
 
-/* Driver scanning options. */
-static struct sr_hwcap_option sr_drvopts[] = {
-       {SR_HWOPT_MODEL, SR_T_KEYVALUE, "Model", "model"},
-       {SR_HWOPT_CONN, SR_T_CHAR, "Connection", "conn"},
-       {SR_HWOPT_SERIALCOMM, SR_T_CHAR, "Serial communication", "serialcomm"},
-       {0, 0, NULL, NULL},
-};
-
-/* Device instance options. */
-static struct sr_hwcap_option sr_devopts[] = {
-       {SR_HWCAP_SAMPLERATE, SR_T_UINT64, "Sample rate", "samplerate"},
-       {SR_HWCAP_CAPTURE_RATIO, SR_T_UINT64, "Pre-trigger capture ratio", "captureratio"},
-       {SR_HWCAP_PATTERN_MODE, SR_T_CHAR, "Pattern generator mode", "pattern"},
-       {SR_HWCAP_RLE, SR_T_BOOL, "Run Length Encoding", "rle"},
-       {SR_HWCAP_TRIGGER_SLOPE, SR_T_UINT64, "Trigger slope", "triggerslope"},
-       {SR_HWCAP_TRIGGER_SOURCE, SR_T_CHAR, "Trigger source", "triggersource"},
-       {SR_HWCAP_HORIZ_TRIGGERPOS, SR_T_FLOAT, "Horizontal trigger position",
-                       "horiz_triggerpos"},
-       {SR_HWCAP_BUFFERSIZE, SR_T_UINT64, "Buffer size", "buffersize"},
-       {SR_HWCAP_TIMEBASE, SR_T_RATIONAL_PERIOD, "Time base", "timebase"},
-       {SR_HWCAP_FILTER, SR_T_CHAR, "Filter targets", "filter"},
-       {SR_HWCAP_VDIV, SR_T_RATIONAL_VOLT, "Volts/div", "vdiv"},
-       {SR_HWCAP_COUPLING, SR_T_CHAR, "Coupling", "coupling"},
-       {0, 0, NULL, NULL},
+static struct sr_config_info sr_config_info_data[] = {
+       {SR_CONF_CONN, SR_T_CHAR, "conn",
+               "Connection", NULL},
+       {SR_CONF_SERIALCOMM, SR_T_CHAR, "serialcomm",
+               "Serial communication", NULL},
+       {SR_CONF_SAMPLERATE, SR_T_UINT64, "samplerate",
+               "Sample rate", NULL},
+       {SR_CONF_CAPTURE_RATIO, SR_T_UINT64, "captureratio",
+               "Pre-trigger capture ratio", NULL},
+       {SR_CONF_PATTERN_MODE, SR_T_CHAR, "pattern",
+               "Pattern generator mode", NULL},
+       {SR_CONF_TRIGGER_TYPE, SR_T_CHAR, "triggertype",
+               "Trigger types", NULL},
+       {SR_CONF_RLE, SR_T_BOOL, "rle",
+               "Run Length Encoding", NULL},
+       {SR_CONF_TRIGGER_SLOPE, SR_T_UINT64, "triggerslope",
+               "Trigger slope", NULL},
+       {SR_CONF_TRIGGER_SOURCE, SR_T_CHAR, "triggersource",
+               "Trigger source", NULL},
+       {SR_CONF_HORIZ_TRIGGERPOS, SR_T_FLOAT, "horiz_triggerpos",
+               "Horizontal trigger position", NULL},
+       {SR_CONF_BUFFERSIZE, SR_T_UINT64, "buffersize",
+               "Buffer size", NULL},
+       {SR_CONF_TIMEBASE, SR_T_RATIONAL_PERIOD, "timebase",
+               "Time base", NULL},
+       {SR_CONF_FILTER, SR_T_CHAR, "filter",
+               "Filter targets", NULL},
+       {SR_CONF_VDIV, SR_T_RATIONAL_VOLT, "vdiv",
+               "Volts/div", NULL},
+       {SR_CONF_COUPLING, SR_T_CHAR, "coupling",
+               "Coupling", NULL},
+       {SR_CONF_DATALOG, SR_T_BOOL, "datalog",
+               "Datalog", NULL},
+       {SR_CONF_SPL_WEIGHT_FREQ, SR_T_CHAR, "spl_weight_freq",
+               "Sound pressure level frequency weighting", NULL},
+       {SR_CONF_SPL_WEIGHT_TIME, SR_T_CHAR, "spl_weight_time",
+               "Sound pressure level time weighting", NULL},
+       {SR_CONF_HOLD_MAX, SR_T_BOOL, "hold_max",
+               "Hold max", NULL},
+       {SR_CONF_HOLD_MIN, SR_T_BOOL, "hold_min",
+               "Hold min", NULL},
+       {SR_CONF_SPL_MEASUREMENT_RANGE, SR_T_UINT64_RANGE, "spl_meas_range",
+               "Sound pressure level measurement range", NULL},
+       {SR_CONF_POWER_OFF, SR_T_BOOL, "power_off",
+               "Power off", NULL},
+       {SR_CONF_DATA_SOURCE, SR_T_CHAR, "data_source",
+               "Data source", NULL},
+       {0, 0, NULL, NULL, NULL},
 };
 
 /** @cond PRIVATE */
+#ifdef HAVE_HW_BRYMEN_DMM
+extern SR_PRIV struct sr_dev_driver brymen_bm857_driver_info;
+#endif
+#ifdef HAVE_HW_CEM_DT_885X
+extern SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
+#endif
 #ifdef HAVE_HW_COLEAD_SLM
 extern SR_PRIV struct sr_dev_driver colead_slm_driver_info;
 #endif
-#ifdef HAVE_LA_DEMO
+#ifdef HAVE_HW_DEMO
 extern SR_PRIV struct sr_dev_driver demo_driver_info;
 #endif
+#ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
+extern SR_PRIV struct sr_dev_driver ikalogic_scanalogic2_driver_info;
+#endif
+#ifdef HAVE_HW_IKALOGIC_SCANAPLUS
+extern SR_PRIV struct sr_dev_driver ikalogic_scanaplus_driver_info;
+#endif
+#ifdef HAVE_HW_KECHENG_KC_330B
+extern SR_PRIV struct sr_dev_driver kecheng_kc_330b_driver_info;
+#endif
 #ifdef HAVE_HW_LASCAR_EL_USB
 extern SR_PRIV struct sr_dev_driver lascar_el_usb_driver_info;
 #endif
-#ifdef HAVE_HW_NEXUS_OSCIPRIME
-extern SR_PRIV struct sr_dev_driver nexus_osciprime_driver_info;
+#ifdef HAVE_HW_MIC_985XX
+extern SR_PRIV struct sr_dev_driver mic_98581_driver_info;
+extern SR_PRIV struct sr_dev_driver mic_98583_driver_info;
 #endif
-#ifdef HAVE_LA_OLS
+#ifdef HAVE_HW_OLS
 extern SR_PRIV struct sr_dev_driver ols_driver_info;
 #endif
+#ifdef HAVE_HW_RIGOL_DS1XX2
+extern SR_PRIV struct sr_dev_driver rigol_ds1xx2_driver_info;
+#endif
 #ifdef HAVE_HW_TONDAJ_SL_814
 extern SR_PRIV struct sr_dev_driver tondaj_sl_814_driver_info;
 #endif
 #ifdef HAVE_HW_VICTOR_DMM
 extern SR_PRIV struct sr_dev_driver victor_dmm_driver_info;
 #endif
-#ifdef HAVE_LA_ZEROPLUS_LOGIC_CUBE
+#ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
 extern SR_PRIV struct sr_dev_driver zeroplus_logic_cube_driver_info;
 #endif
-#ifdef HAVE_LA_ASIX_SIGMA
+#ifdef HAVE_HW_ASIX_SIGMA
 extern SR_PRIV struct sr_dev_driver asix_sigma_driver_info;
 #endif
-#ifdef HAVE_LA_CHRONOVU_LA8
+#ifdef HAVE_HW_CHRONOVU_LA8
 extern SR_PRIV struct sr_dev_driver chronovu_la8_driver_info;
 #endif
-#ifdef HAVE_LA_LINK_MSO19
+#ifdef HAVE_HW_LINK_MSO19
 extern SR_PRIV struct sr_dev_driver link_mso19_driver_info;
 #endif
 #ifdef HAVE_HW_ALSA
 extern SR_PRIV struct sr_dev_driver alsa_driver_info;
 #endif
-#ifdef HAVE_LA_FX2LAFW
+#ifdef HAVE_HW_FX2LAFW
 extern SR_PRIV struct sr_dev_driver fx2lafw_driver_info;
 #endif
 #ifdef HAVE_HW_HANTEK_DSO
@@ -127,55 +179,87 @@ extern SR_PRIV struct sr_dev_driver metex_m3640d_driver_info;
 extern SR_PRIV struct sr_dev_driver peaktech_4370_driver_info;
 extern SR_PRIV struct sr_dev_driver pce_pce_dm32_driver_info;
 extern SR_PRIV struct sr_dev_driver radioshack_22_168_driver_info;
+extern SR_PRIV struct sr_dev_driver radioshack_22_805_driver_info;
 extern SR_PRIV struct sr_dev_driver radioshack_22_812_driver_info;
+extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_ser_driver_info;
+extern SR_PRIV struct sr_dev_driver voltcraft_m3650d_driver_info;
 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_ser_driver_info;
+extern SR_PRIV struct sr_dev_driver voltcraft_vc830_ser_driver_info;
 extern SR_PRIV struct sr_dev_driver voltcraft_vc840_ser_driver_info;
+extern SR_PRIV struct sr_dev_driver uni_t_ut60a_ser_driver_info;
+extern SR_PRIV struct sr_dev_driver uni_t_ut60e_ser_driver_info;
+extern SR_PRIV struct sr_dev_driver uni_t_ut61d_ser_driver_info;
 extern SR_PRIV struct sr_dev_driver uni_t_ut61e_ser_driver_info;
 #endif
 #ifdef HAVE_HW_UNI_T_DMM
+extern SR_PRIV struct sr_dev_driver tecpel_dmm_8061_driver_info;
+extern SR_PRIV struct sr_dev_driver uni_t_ut60a_driver_info;
+extern SR_PRIV struct sr_dev_driver uni_t_ut60e_driver_info;
 extern SR_PRIV struct sr_dev_driver uni_t_ut61d_driver_info;
+extern SR_PRIV struct sr_dev_driver uni_t_ut61e_driver_info;
 extern SR_PRIV struct sr_dev_driver voltcraft_vc820_driver_info;
+extern SR_PRIV struct sr_dev_driver voltcraft_vc830_driver_info;
+extern SR_PRIV struct sr_dev_driver voltcraft_vc840_driver_info;
 #endif
 /** @endcond */
 
 static struct sr_dev_driver *drivers_list[] = {
+#ifdef HAVE_HW_BRYMEN_DMM
+       &brymen_bm857_driver_info,
+#endif
+#ifdef HAVE_HW_CEM_DT_885X
+       &cem_dt_885x_driver_info,
+#endif
 #ifdef HAVE_HW_COLEAD_SLM
        &colead_slm_driver_info,
 #endif
-#ifdef HAVE_LA_DEMO
+#ifdef HAVE_HW_DEMO
        &demo_driver_info,
 #endif
+#ifdef HAVE_HW_IKALOGIC_SCANALOGIC2
+       &ikalogic_scanalogic2_driver_info,
+#endif
+#ifdef HAVE_HW_IKALOGIC_SCANAPLUS
+       &ikalogic_scanaplus_driver_info,
+#endif
+#ifdef HAVE_HW_KECHENG_KC_330B
+       &kecheng_kc_330b_driver_info,
+#endif
 #ifdef HAVE_HW_LASCAR_EL_USB
        &lascar_el_usb_driver_info,
 #endif
-#ifdef HAVE_HW_NEXUS_OSCIPRIME
-       &nexus_osciprime_driver_info,
+#ifdef HAVE_HW_MIC_985XX
+       &mic_98581_driver_info,
+       &mic_98583_driver_info,
 #endif
-#ifdef HAVE_LA_OLS
+#ifdef HAVE_HW_OLS
        &ols_driver_info,
 #endif
+#ifdef HAVE_HW_RIGOL_DS1XX2
+       &rigol_ds1xx2_driver_info,
+#endif
 #ifdef HAVE_HW_TONDAJ_SL_814
        &tondaj_sl_814_driver_info,
 #endif
 #ifdef HAVE_HW_VICTOR_DMM
        &victor_dmm_driver_info,
 #endif
-#ifdef HAVE_LA_ZEROPLUS_LOGIC_CUBE
+#ifdef HAVE_HW_ZEROPLUS_LOGIC_CUBE
        &zeroplus_logic_cube_driver_info,
 #endif
-#ifdef HAVE_LA_ASIX_SIGMA
+#ifdef HAVE_HW_ASIX_SIGMA
        &asix_sigma_driver_info,
 #endif
-#ifdef HAVE_LA_CHRONOVU_LA8
+#ifdef HAVE_HW_CHRONOVU_LA8
        &chronovu_la8_driver_info,
 #endif
-#ifdef HAVE_LA_LINK_MSO19
+#ifdef HAVE_HW_LINK_MSO19
        &link_mso19_driver_info,
 #endif
 #ifdef HAVE_HW_ALSA
        &alsa_driver_info,
 #endif
-#ifdef HAVE_LA_FX2LAFW
+#ifdef HAVE_HW_FX2LAFW
        &fx2lafw_driver_info,
 #endif
 #ifdef HAVE_HW_HANTEK_DSO
@@ -198,14 +282,27 @@ static struct sr_dev_driver *drivers_list[] = {
        &peaktech_4370_driver_info,
        &pce_pce_dm32_driver_info,
        &radioshack_22_168_driver_info,
+       &radioshack_22_805_driver_info,
        &radioshack_22_812_driver_info,
+       &tecpel_dmm_8061_ser_driver_info,
+       &voltcraft_m3650d_driver_info,
        &voltcraft_vc820_ser_driver_info,
+       &voltcraft_vc830_ser_driver_info,
        &voltcraft_vc840_ser_driver_info,
+       &uni_t_ut60a_ser_driver_info,
+       &uni_t_ut60e_ser_driver_info,
+       &uni_t_ut61d_ser_driver_info,
        &uni_t_ut61e_ser_driver_info,
 #endif
 #ifdef HAVE_HW_UNI_T_DMM
+       &tecpel_dmm_8061_driver_info,
+       &uni_t_ut60a_driver_info,
+       &uni_t_ut60e_driver_info,
        &uni_t_ut61d_driver_info,
+       &uni_t_ut61e_driver_info,
        &voltcraft_vc820_driver_info,
+       &voltcraft_vc830_driver_info,
+       &voltcraft_vc840_driver_info,
 #endif
        NULL,
 };
@@ -224,19 +321,38 @@ SR_API struct sr_dev_driver **sr_driver_list(void)
 /**
  * Initialize a hardware driver.
  *
+ * This usually involves memory allocations and variable initializations
+ * within the driver, but _not_ scanning for attached devices.
+ * The API call sr_driver_scan() is used for that.
+ *
  * @param ctx A libsigrok context object allocated by a previous call to
- *             sr_init().
- * @param driver The driver to initialize.
+ *            sr_init(). Must not be NULL.
+ * @param driver The driver to initialize. This must be a pointer to one of
+ *               the entries returned by sr_driver_list(). Must not be NULL.
  *
- * @return SR_OK if all went well, or an error code otherwise.
+ * @return SR_OK upon success, SR_ERR_ARG upon invalid parameters,
+ *         SR_ERR_BUG upon internal errors, or another negative error code
+ *         upon other errors.
  */
 SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
 {
+       int ret;
 
-       if (driver->init)
-               return driver->init(ctx);
+       if (!ctx) {
+               sr_err("Invalid libsigrok context, can't initialize.");
+               return SR_ERR_ARG;
+       }
 
-       return SR_OK;
+       if (!driver) {
+               sr_err("Invalid driver, can't initialize.");
+               return SR_ERR_ARG;
+       }
+
+       sr_spew("Initializing driver '%s'.", driver->name);
+       if ((ret = driver->init(ctx)) < 0)
+               sr_err("Failed to initialize the driver: %d.", ret);
+
+       return ret;
 }
 
 /**
@@ -249,21 +365,39 @@ SR_API int sr_driver_init(struct sr_context *ctx, struct sr_dev_driver *driver)
  * The order in which the system is scanned for devices is not specified. The
  * caller should not assume or rely on any specific order.
  *
- * @param driver The driver.
- * @param options A list of struct sr_hwopt options to pass to the driver's
- *             scanner.
+ * Before calling sr_driver_scan(), the user must have previously initialized
+ * the driver by calling sr_driver_init().
  *
- * @return A GSList * of struct sr_dev_inst, or NULL if no devices were found.
- * This list must be freed by the caller, but without freeing the data
- * pointed to in the list.
+ * @param driver The driver that should scan. This must be a pointer to one of
+ *               the entries returned by sr_driver_list(). Must not be NULL.
+ * @param options A list of 'struct sr_hwopt' options to pass to the driver's
+ *                scanner. Can be NULL/empty.
+ *
+ * @return A GSList * of 'struct sr_dev_inst', or NULL if no devices were
+ *         found (or errors were encountered). This list must be freed by the
+ *         caller using g_slist_free(), but without freeing the data pointed
+ *         to in the list.
  */
 SR_API GSList *sr_driver_scan(struct sr_dev_driver *driver, GSList *options)
 {
+       GSList *l;
+
+       if (!driver) {
+               sr_err("Invalid driver, can't scan for devices.");
+               return NULL;
+       }
 
-       if (driver->scan)
-               return driver->scan(options);
+       if (!driver->priv) {
+               sr_err("Driver not initialized, can't scan for devices.");
+               return NULL;
+       }
 
-       return NULL;
+       l = driver->scan(options);
+
+       sr_spew("Scan of '%s' found %d devices.", driver->name,
+               g_slist_length(l));
+
+       return l;
 }
 
 /** @private */
@@ -279,138 +413,171 @@ SR_PRIV void sr_hw_cleanup_all(void)
        }
 }
 
+/** A floating reference can be passed in for data. */
+SR_PRIV struct sr_config *sr_config_new(int key, GVariant *data)
+{
+       struct sr_config *src;
+
+       if (!(src = g_try_malloc(sizeof(struct sr_config))))
+               return NULL;
+       src->key = key;
+       src->data = g_variant_ref_sink(data);
+
+       return src;
+}
+
+SR_PRIV void sr_config_free(struct sr_config *src)
+{
+
+       if (!src || !src->data) {
+               sr_err("%s: invalid data!", __func__);
+               return;
+       }
+
+       g_variant_unref(src->data);
+       g_free(src);
+
+}
+
 /**
  * Returns information about the given driver or device instance.
  *
  * @param driver The sr_dev_driver struct to query.
- * @param id The type of information, in the form of an SR_HWCAP_* option.
- * @param data Pointer where the value. will be stored. Must not be NULL.
- * @param sdi Pointer to the struct sr_dev_inst to be checked. Must not be NULL.
+ * @param key The configuration key (SR_CONF_*).
+ * @param data Pointer to a GVariant where the value will be stored. Must
+ *             not be NULL. The caller is given ownership of the GVariant
+ *             and must thus decrease the refcount after use. However if
+ *             this function returns an error code, the field should be
+ *             considered unused, and should not be unreferenced.
+ * @param sdi (optional) If the key is specific to a device, this must
+ *            contain a pointer to the struct sr_dev_inst to be checked.
+ *            Otherwise it must be NULL.
  *
  * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
- *         may be returned by the driver indicating it doesn't know that id,
+ *         may be returned by the driver indicating it doesn't know that key,
  *         but this is not to be flagged as an error by the caller; merely
  *         as an indication that it's not applicable.
  */
-SR_API int sr_info_get(struct sr_dev_driver *driver, int id,
-               const void **data, const struct sr_dev_inst *sdi)
+SR_API int sr_config_get(const struct sr_dev_driver *driver, int key,
+               GVariant **data, const struct sr_dev_inst *sdi)
 {
        int ret;
 
-       if (driver == NULL || data == NULL)
+       if (!driver || !data)
                return SR_ERR;
 
-       ret = driver->info_get(id, data, sdi);
+       if (!driver->config_get)
+               return SR_ERR_ARG;
+
+       if ((ret = driver->config_get(key, data, sdi)) == SR_OK) {
+               /* Got a floating reference from the driver. Sink it here,
+                * caller will need to unref when done with it. */
+               g_variant_ref_sink(*data);
+       }
 
        return ret;
 }
 
 /**
- * Find out if a hardware driver has a specific capability.
+ * Set a configuration key in a device instance.
  *
- * @param driver The hardware driver in which to search for the capability.
- * @param hwcap The capability to find in the list.
+ * @param sdi The device instance.
+ * @param key The configuration key (SR_CONF_*).
+ * @param data The new value for the key, as a GVariant with GVariantType
+ *        appropriate to that key. A floating reference can be passed
+ *        in; its refcount will be sunk and unreferenced after use.
  *
- * @return TRUE if the specified capability exists in the specified driver,
- *         FALSE otherwise. Also, if 'driver' is NULL or the respective driver
- *         returns an invalid capability list, FALSE is returned.
+ * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
+ *         may be returned by the driver indicating it doesn't know that key,
+ *         but this is not to be flagged as an error by the caller; merely
+ *         as an indication that it's not applicable.
  */
-SR_API gboolean sr_driver_hwcap_exists(struct sr_dev_driver *driver, int hwcap)
+SR_API int sr_config_set(const struct sr_dev_inst *sdi, int key, GVariant *data)
 {
-       const int *hwcaps;
-       int i;
-
-       if (!driver) {
-               sr_err("hwdriver: %s: driver was NULL", __func__);
-               return FALSE;
-       }
-
-       if (driver->info_get(SR_DI_HWCAPS, (const void **)&hwcaps, NULL) != SR_OK)
-               return FALSE;
-
-       for (i = 0; hwcaps[i]; i++) {
-               if (hwcaps[i] == hwcap)
-                       return TRUE;
-       }
+       int ret;
 
-       return FALSE;
-}
+       g_variant_ref_sink(data);
 
-/**
- * Get information about a hardware driver option.
- *
- * @param opt The option to get.
- *
- * @return A pointer to a struct sr_hwcap_option, or NULL if the option
- *         was not found.
- */
-SR_API const struct sr_hwcap_option *sr_drvopt_get(int opt)
-{
-       int i;
+       if (!sdi || !sdi->driver || !data)
+               ret = SR_ERR;
+       else if (!sdi->driver->config_set)
+               ret = SR_ERR_ARG;
+       else
+               ret = sdi->driver->config_set(key, data, sdi);
 
-       for (i = 0; sr_drvopts[i].hwcap; i++) {
-               if (sr_drvopts[i].hwcap == opt)
-                       return &sr_drvopts[i];
-       }
+       g_variant_unref(data);
 
-       return NULL;
+       return ret;
 }
 
 /**
- * Get information about a hardware driver option, by name.
+ * List all possible values for a configuration key.
  *
- * @param optname The name of the option to get.
+ * @param driver The sr_dev_driver struct to query.
+ * @param key The configuration key (SR_CONF_*).
+ * @param data A pointer to a GVariant where the list will be stored. The
+ *             caller is given ownership of the GVariant and must thus
+ *             unref the GVariant after use. However if this function
+ *             returns an error code, the field should be considered
+ *             unused, and should not be unreferenced.
+ * @param sdi (optional) If the key is specific to a device, this must
+ *            contain a pointer to the struct sr_dev_inst to be checked.
  *
- * @return A pointer to a struct sr_hwcap_option, or NULL if the option
- *         was not found.
+ * @return SR_OK upon success or SR_ERR in case of error. Note SR_ERR_ARG
+ *         may be returned by the driver indicating it doesn't know that key,
+ *         but this is not to be flagged as an error by the caller; merely
+ *         as an indication that it's not applicable.
  */
-SR_API const struct sr_hwcap_option *sr_drvopt_name_get(const char *optname)
+SR_API int sr_config_list(const struct sr_dev_driver *driver, int key,
+               GVariant **data, const struct sr_dev_inst *sdi)
 {
-       int i;
+       int ret;
 
-       for (i = 0; sr_drvopts[i].hwcap; i++) {
-               if (!strcmp(sr_drvopts[i].shortname, optname))
-                       return &sr_drvopts[i];
-       }
+       if (!driver || !data)
+               ret = SR_ERR;
+       else if (!driver->config_list)
+               ret = SR_ERR_ARG;
+       else if ((ret = driver->config_list(key, data, sdi)) == SR_OK)
+               g_variant_ref_sink(*data);
 
-       return NULL;
+       return ret;
 }
 
 /**
- * Get information about a device option.
+ * Get information about a configuration key.
  *
- * @param opt The option to get.
+ * @param key The configuration key.
  *
- * @return A pointer to a struct sr_hwcap_option, or NULL if the option
+ * @return A pointer to a struct sr_config_info, or NULL if the key
  *         was not found.
  */
-SR_API const struct sr_hwcap_option *sr_devopt_get(int opt)
+SR_API const struct sr_config_info *sr_config_info_get(int key)
 {
        int i;
 
-       for (i = 0; sr_devopts[i].hwcap; i++) {
-               if (sr_devopts[i].hwcap == opt)
-                       return &sr_devopts[i];
+       for (i = 0; sr_config_info_data[i].key; i++) {
+               if (sr_config_info_data[i].key == key)
+                       return &sr_config_info_data[i];
        }
 
        return NULL;
 }
 
 /**
- * Get information about a device option, by name.
+ * Get information about an configuration key, by name.
  *
- * @param optname The name of the option to get.
+ * @param optname The configuration key.
  *
- * @return A pointer to a struct sr_hwcap_option, or NULL if the option
+ * @return A pointer to a struct sr_config_info, or NULL if the key
  *         was not found.
  */
-SR_API const struct sr_hwcap_option *sr_devopt_name_get(const char *optname)
+SR_API const struct sr_config_info *sr_config_info_name_get(const char *optname)
 {
        int i;
 
-       for (i = 0; sr_devopts[i].hwcap; i++) {
-               if (!strcmp(sr_devopts[i].shortname, optname))
-                       return &sr_devopts[i];
+       for (i = 0; sr_config_info_data[i].key; i++) {
+               if (!strcmp(sr_config_info_data[i].id, optname))
+                       return &sr_config_info_data[i];
        }
 
        return NULL;