799 lines
19 KiB
C
799 lines
19 KiB
C
/*
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* This file is part of the libsigrok project.
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*
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* Copyright (C) 2013 Bert Vermeulen <bert@biot.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <glib.h>
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#include <libsigrok/libsigrok.h>
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#include "libsigrok-internal.h"
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/** @cond PRIVATE */
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#define LOG_PREFIX "device"
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/** @endcond */
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/**
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* @file
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*
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* Device handling in libsigrok.
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*/
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/**
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* @defgroup grp_devices Devices
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*
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* Device handling in libsigrok.
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*
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* @{
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*/
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/**
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* Allocate and initialize a new struct sr_channel and add it to sdi.
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*
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* @param[in] sdi The device instance the channel is connected to.
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* Must not be NULL.
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* @param[in] index @copydoc sr_channel::index
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* @param[in] type @copydoc sr_channel::type
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* @param[in] enabled @copydoc sr_channel::enabled
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* @param[in] name @copydoc sr_channel::name
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*
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* @return A new struct sr_channel*.
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*
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* @private
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*/
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SR_PRIV struct sr_channel *sr_channel_new(struct sr_dev_inst *sdi,
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int index, int type, gboolean enabled, const char *name)
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{
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struct sr_channel *ch;
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ch = g_malloc0(sizeof(struct sr_channel));
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ch->sdi = sdi;
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ch->index = index;
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ch->type = type;
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ch->enabled = enabled;
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if (name)
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ch->name = g_strdup(name);
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sdi->channels = g_slist_append(sdi->channels, ch);
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return ch;
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}
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/**
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* Set the name of the specified channel.
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*
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* If the channel already has a different name assigned to it, it will be
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* removed, and the new name will be saved instead.
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*
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* @param[in] channel The channel whose name to set. Must not be NULL.
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* @param[in] name The new name that the specified channel should get.
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* A copy of the string is made.
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*
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* @return SR_OK on success, or SR_ERR_ARG on invalid arguments.
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*
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* @since 0.3.0
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*/
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SR_API int sr_dev_channel_name_set(struct sr_channel *channel,
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const char *name)
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{
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if (!channel)
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return SR_ERR_ARG;
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g_free(channel->name);
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channel->name = g_strdup(name);
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return SR_OK;
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}
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/**
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* Enable or disable a channel.
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*
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* @param[in] channel The channel to enable or disable. Must not be NULL.
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* @param[in] state TRUE to enable the channel, FALSE to disable.
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*
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* @return SR_OK on success or SR_ERR on failure. In case of invalid
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* arguments, SR_ERR_ARG is returned and the channel enabled state
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* remains unchanged.
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*
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* @since 0.3.0
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*/
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SR_API int sr_dev_channel_enable(struct sr_channel *channel, gboolean state)
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{
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int ret;
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gboolean was_enabled;
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struct sr_dev_inst *sdi;
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if (!channel)
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return SR_ERR_ARG;
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sdi = channel->sdi;
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was_enabled = channel->enabled;
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channel->enabled = state;
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if (!state != !was_enabled && sdi->driver
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&& sdi->driver->config_channel_set) {
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ret = sdi->driver->config_channel_set(
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sdi, channel, SR_CHANNEL_SET_ENABLED);
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/* Roll back change if it wasn't applicable. */
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if (ret != SR_OK)
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return ret;
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}
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return SR_OK;
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}
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/* Returns the next enabled channel, wrapping around if necessary. */
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/** @private */
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SR_PRIV struct sr_channel *sr_next_enabled_channel(const struct sr_dev_inst *sdi,
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struct sr_channel *cur_channel)
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{
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struct sr_channel *next_channel;
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GSList *l;
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next_channel = cur_channel;
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do {
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l = g_slist_find(sdi->channels, next_channel);
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if (l && l->next)
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next_channel = l->next->data;
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else
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next_channel = sdi->channels->data;
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} while (!next_channel->enabled);
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return next_channel;
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}
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/**
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* Determine whether the specified device instance has the specified
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* capability.
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*
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* @param sdi Pointer to the device instance to be checked. Must not be NULL.
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* If the device's 'driver' field is NULL (virtual device), this
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* function will always return FALSE (virtual devices don't have
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* a hardware capabilities list).
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* @param[in] key The option that should be checked for is supported by the
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* specified device.
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*
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* @retval TRUE Device has the specified option.
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* @retval FALSE Device does not have the specified option, invalid input
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* parameters or other error conditions.
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*
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* @since 0.2.0
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*/
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SR_API gboolean sr_dev_has_option(const struct sr_dev_inst *sdi, int key)
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{
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GVariant *gvar;
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const int *devopts;
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gsize num_opts, i;
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int ret;
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if (!sdi || !sdi->driver || !sdi->driver->config_list)
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return FALSE;
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if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS,
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&gvar, sdi, NULL) != SR_OK)
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return FALSE;
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ret = FALSE;
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devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t));
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for (i = 0; i < num_opts; i++) {
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if ((devopts[i] & SR_CONF_MASK) == key) {
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ret = TRUE;
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break;
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}
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}
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g_variant_unref(gvar);
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return ret;
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}
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/**
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* Enumerate the configuration options of the specified item.
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*
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* @param driver Pointer to the driver to be checked. Must not be NULL.
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* @param sdi Pointer to the device instance to be checked. May be NULL to
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* check driver options.
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* @param cg Pointer to a channel group, if a specific channel group is to
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* be checked. Must be NULL to check device-wide options.
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*
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* @return A GArray * of enum sr_configkey values, or NULL on invalid
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* arguments. The array must be freed by the caller using
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* g_array_free().
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*
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* @since 0.4.0
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*/
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SR_API GArray *sr_dev_options(const struct sr_dev_driver *driver,
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const struct sr_dev_inst *sdi, const struct sr_channel_group *cg)
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{
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GVariant *gvar;
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const uint32_t *opts;
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uint32_t opt;
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gsize num_opts, i;
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GArray *result;
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if (!driver || !driver->config_list)
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return NULL;
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if (sdi && sdi->driver != driver)
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return NULL;
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if (driver->config_list(SR_CONF_DEVICE_OPTIONS, &gvar, sdi, cg) != SR_OK)
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return NULL;
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opts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(uint32_t));
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result = g_array_sized_new(FALSE, FALSE, sizeof(uint32_t), num_opts);
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for (i = 0; i < num_opts; i++) {
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opt = opts[i] & SR_CONF_MASK;
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g_array_insert_val(result, i, opt);
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}
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g_variant_unref(gvar);
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return result;
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}
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/**
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* Enumerate the configuration capabilities supported by a device instance
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* for a given configuration key.
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*
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* @param sdi Pointer to the device instance to be checked. Must not be NULL.
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* If the device's 'driver' field is NULL (virtual device), this
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* function will always return FALSE (virtual devices don't have
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* a hardware capabilities list).
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* @param cg Pointer to a channel group, if a specific channel group is to
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* be checked. Must be NULL to check device-wide options.
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* @param[in] key The option that should be checked for is supported by the
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* specified device.
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*
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* @retval A bitmask of enum sr_configcap values, which will be zero for
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* invalid inputs or if the key is unsupported.
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*
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* @since 0.4.0
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*/
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SR_API int sr_dev_config_capabilities_list(const struct sr_dev_inst *sdi,
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const struct sr_channel_group *cg, const int key)
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{
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GVariant *gvar;
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const int *devopts;
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gsize num_opts, i;
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int ret;
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if (!sdi || !sdi->driver || !sdi->driver->config_list)
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return 0;
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if (sdi->driver->config_list(SR_CONF_DEVICE_OPTIONS,
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&gvar, sdi, cg) != SR_OK)
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return 0;
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ret = 0;
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devopts = g_variant_get_fixed_array(gvar, &num_opts, sizeof(int32_t));
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for (i = 0; i < num_opts; i++) {
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if ((devopts[i] & SR_CONF_MASK) == key) {
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ret = devopts[i] & ~SR_CONF_MASK;
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break;
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}
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}
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g_variant_unref(gvar);
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return ret;
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}
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/**
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* Allocate and init a new user-generated device instance.
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*
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* @param vendor Device vendor.
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* @param model Device model.
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* @param version Device version.
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*
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* @retval struct sr_dev_inst *. Dynamically allocated, free using
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* sr_dev_inst_free().
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*/
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SR_API struct sr_dev_inst *sr_dev_inst_user_new(const char *vendor,
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const char *model, const char *version)
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{
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struct sr_dev_inst *sdi;
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sdi = g_malloc0(sizeof(struct sr_dev_inst));
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sdi->vendor = g_strdup(vendor);
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sdi->model = g_strdup(model);
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sdi->version = g_strdup(version);
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sdi->inst_type = SR_INST_USER;
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return sdi;
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}
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/**
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* Add a new channel to the specified device instance.
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*
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* @param[in] index @copydoc sr_channel::index
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* @param[in] type @copydoc sr_channel::type
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* @param[in] name @copydoc sr_channel::name
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*
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* @return SR_OK Success.
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* @return SR_OK Invalid argument.
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*/
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SR_API int sr_dev_inst_channel_add(struct sr_dev_inst *sdi, int index, int type, const char *name)
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{
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if (!sdi || sdi->inst_type != SR_INST_USER || index < 0)
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return SR_ERR_ARG;
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sr_channel_new(sdi, index, type, TRUE, name);
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return SR_OK;
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}
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/**
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* Free device instance struct created by sr_dev_inst().
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*
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* @param sdi Device instance to free. If NULL, the function will do nothing.
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*
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* @private
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*/
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SR_PRIV void sr_dev_inst_free(struct sr_dev_inst *sdi)
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{
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struct sr_channel *ch;
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struct sr_channel_group *cg;
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GSList *l;
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if (!sdi)
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return;
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for (l = sdi->channels; l; l = l->next) {
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ch = l->data;
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g_free(ch->name);
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g_free(ch->priv);
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g_free(ch);
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}
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g_slist_free(sdi->channels);
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for (l = sdi->channel_groups; l; l = l->next) {
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cg = l->data;
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g_free(cg->name);
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g_slist_free(cg->channels);
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g_free(cg->priv);
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g_free(cg);
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}
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g_slist_free(sdi->channel_groups);
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if (sdi->session)
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sr_session_dev_remove(sdi->session, sdi);
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g_free(sdi->vendor);
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g_free(sdi->model);
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g_free(sdi->version);
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g_free(sdi->serial_num);
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g_free(sdi->connection_id);
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g_free(sdi);
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}
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#ifdef HAVE_LIBUSB_1_0
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/**
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* Allocate and init a struct for a USB device instance.
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*
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* @param[in] bus @copydoc sr_usb_dev_inst::bus
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* @param[in] address @copydoc sr_usb_dev_inst::address
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* @param[in] hdl @copydoc sr_usb_dev_inst::devhdl
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*
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* @return The struct sr_usb_dev_inst * for USB device instance.
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*
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* @private
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*/
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SR_PRIV struct sr_usb_dev_inst *sr_usb_dev_inst_new(uint8_t bus,
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uint8_t address, struct libusb_device_handle *hdl)
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{
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struct sr_usb_dev_inst *udi;
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udi = g_malloc0(sizeof(struct sr_usb_dev_inst));
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udi->bus = bus;
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udi->address = address;
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udi->devhdl = hdl;
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return udi;
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}
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/**
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* Free struct sr_usb_dev_inst * allocated by sr_usb_dev_inst().
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*
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* @param usb The struct sr_usb_dev_inst * to free. If NULL, this
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* function does nothing.
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*
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* @private
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*/
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SR_PRIV void sr_usb_dev_inst_free(struct sr_usb_dev_inst *usb)
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{
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g_free(usb);
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}
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#endif
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#ifdef HAVE_LIBSERIALPORT
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/**
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* Allocate and init a struct for a serial device instance.
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*
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* Both parameters are copied to newly allocated strings, and freed
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* automatically by sr_serial_dev_inst_free().
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*
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* @param[in] port OS-specific serial port specification. Examples:
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* "/dev/ttyUSB0", "/dev/ttyACM1", "/dev/tty.Modem-0", "COM1".
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* Must not be NULL.
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* @param[in] serialcomm A serial communication parameters string, in the form
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* of \<speed\>/\<data bits\>\<parity\>\<stopbits\>, for example
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* "9600/8n1" or "600/7o2". This is an optional parameter;
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* it may be filled in later. Can be NULL.
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*
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* @return A pointer to a newly initialized struct sr_serial_dev_inst,
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* or NULL on error.
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*
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* @private
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*/
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SR_PRIV struct sr_serial_dev_inst *sr_serial_dev_inst_new(const char *port,
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const char *serialcomm)
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{
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struct sr_serial_dev_inst *serial;
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serial = g_malloc0(sizeof(struct sr_serial_dev_inst));
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serial->port = g_strdup(port);
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if (serialcomm)
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serial->serialcomm = g_strdup(serialcomm);
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return serial;
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}
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/**
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* Free struct sr_serial_dev_inst * allocated by sr_serial_dev_inst().
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*
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* @param serial The struct sr_serial_dev_inst * to free. If NULL, this
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* function will do nothing.
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*
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* @private
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*/
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SR_PRIV void sr_serial_dev_inst_free(struct sr_serial_dev_inst *serial)
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{
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if (!serial)
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return;
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g_free(serial->port);
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g_free(serial->serialcomm);
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g_free(serial);
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}
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#endif
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/** @private */
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SR_PRIV struct sr_usbtmc_dev_inst *sr_usbtmc_dev_inst_new(const char *device)
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{
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struct sr_usbtmc_dev_inst *usbtmc;
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usbtmc = g_malloc0(sizeof(struct sr_usbtmc_dev_inst));
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usbtmc->device = g_strdup(device);
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usbtmc->fd = -1;
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return usbtmc;
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}
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|
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/** @private */
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SR_PRIV void sr_usbtmc_dev_inst_free(struct sr_usbtmc_dev_inst *usbtmc)
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{
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if (!usbtmc)
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return;
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g_free(usbtmc->device);
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g_free(usbtmc);
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}
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|
|
/**
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* Get the list of devices/instances of the specified driver.
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*
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* @param driver The driver to use. Must not be NULL.
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*
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* @return The list of devices/instances of this driver, or NULL upon errors
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* or if the list is empty.
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*
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* @since 0.2.0
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*/
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SR_API GSList *sr_dev_list(const struct sr_dev_driver *driver)
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{
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if (driver && driver->dev_list)
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return driver->dev_list(driver);
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else
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return NULL;
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}
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|
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/**
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* Clear the list of device instances a driver knows about.
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*
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* @param driver The driver to use. This must be a pointer to one of
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* the entries returned by sr_driver_list(). Must not be NULL.
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*
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* @retval SR_OK Success.
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* @retval SR_ERR_ARG Invalid driver.
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*
|
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* @since 0.2.0
|
|
*/
|
|
SR_API int sr_dev_clear(const struct sr_dev_driver *driver)
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{
|
|
if (!driver) {
|
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sr_err("Invalid driver.");
|
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return SR_ERR_ARG;
|
|
}
|
|
|
|
if (!driver->context) {
|
|
/*
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|
* Driver was never initialized, nothing to do.
|
|
*
|
|
* No log message since this usually gets called for all
|
|
* drivers, whether they were initialized or not.
|
|
*/
|
|
return SR_OK;
|
|
}
|
|
|
|
/* No log message here, too verbose and not very useful. */
|
|
|
|
return driver->dev_clear(driver);
|
|
}
|
|
|
|
/**
|
|
* Open the specified device instance.
|
|
*
|
|
* If the device instance is already open (sdi->status == SR_ST_ACTIVE),
|
|
* SR_ERR will be returned and no re-opening of the device will be attempted.
|
|
*
|
|
* If opening was successful, sdi->status is set to SR_ST_ACTIVE, otherwise
|
|
* it will be left unchanged.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @retval SR_OK Success.
|
|
* @retval SR_ERR_ARG Invalid arguments.
|
|
* @retval SR_ERR Device instance was already active, or other error.
|
|
*
|
|
* @since 0.2.0
|
|
*/
|
|
SR_API int sr_dev_open(struct sr_dev_inst *sdi)
|
|
{
|
|
int ret;
|
|
|
|
if (!sdi || !sdi->driver || !sdi->driver->dev_open)
|
|
return SR_ERR_ARG;
|
|
|
|
if (sdi->status == SR_ST_ACTIVE) {
|
|
sr_err("%s: Device instance already active, can't re-open.",
|
|
sdi->driver->name);
|
|
return SR_ERR;
|
|
}
|
|
|
|
sr_dbg("%s: Opening device instance.", sdi->driver->name);
|
|
|
|
ret = sdi->driver->dev_open(sdi);
|
|
|
|
if (ret == SR_OK)
|
|
sdi->status = SR_ST_ACTIVE;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Close the specified device instance.
|
|
*
|
|
* If the device instance is not open (sdi->status != SR_ST_ACTIVE),
|
|
* SR_ERR_DEV_CLOSED will be returned and no closing will be attempted.
|
|
*
|
|
* Note: sdi->status will be set to SR_ST_INACTIVE, regardless of whether
|
|
* there are any errors during closing of the device instance (any errors
|
|
* will be reported via error code and log message, though).
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @retval SR_OK Success.
|
|
* @retval SR_ERR_ARG Invalid arguments.
|
|
* @retval SR_ERR_DEV_CLOSED Device instance was not active.
|
|
* @retval SR_ERR Other error.
|
|
*
|
|
* @since 0.2.0
|
|
*/
|
|
SR_API int sr_dev_close(struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi || !sdi->driver || !sdi->driver->dev_close)
|
|
return SR_ERR_ARG;
|
|
|
|
if (sdi->status != SR_ST_ACTIVE) {
|
|
sr_err("%s: Device instance not active, can't close.",
|
|
sdi->driver->name);
|
|
return SR_ERR_DEV_CLOSED;
|
|
}
|
|
|
|
sdi->status = SR_ST_INACTIVE;
|
|
|
|
sr_dbg("%s: Closing device instance.", sdi->driver->name);
|
|
|
|
return sdi->driver->dev_close(sdi);
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' driver.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The driver instance or NULL on error.
|
|
*/
|
|
SR_API struct sr_dev_driver *sr_dev_inst_driver_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi || !sdi->driver)
|
|
return NULL;
|
|
|
|
return sdi->driver;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' vendor.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The vendor string or NULL.
|
|
*/
|
|
SR_API const char *sr_dev_inst_vendor_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
return sdi->vendor;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' model.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The model string or NULL.
|
|
*/
|
|
SR_API const char *sr_dev_inst_model_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
return sdi->model;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' version.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The version string or NULL.
|
|
*/
|
|
SR_API const char *sr_dev_inst_version_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
return sdi->version;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' serial number.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The serial number string or NULL.
|
|
*/
|
|
SR_API const char *sr_dev_inst_sernum_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
return sdi->serial_num;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' connection identifier.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return A copy of the connection ID string or NULL. The caller is responsible
|
|
* for g_free()ing the string when it is no longer needed.
|
|
*/
|
|
SR_API const char *sr_dev_inst_connid_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
#ifdef HAVE_LIBUSB_1_0
|
|
struct drv_context *drvc;
|
|
int cnt, i, a, b;
|
|
char connection_id[64];
|
|
struct sr_usb_dev_inst *usb;
|
|
struct libusb_device **devlist;
|
|
#endif
|
|
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
#ifdef HAVE_LIBSERIALPORT
|
|
struct sr_serial_dev_inst *serial;
|
|
|
|
if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_SERIAL)) {
|
|
/* connection_id isn't populated, let's do that here. */
|
|
|
|
serial = sdi->conn;
|
|
((struct sr_dev_inst *)sdi)->connection_id = g_strdup(serial->port);
|
|
}
|
|
#endif
|
|
|
|
#ifdef HAVE_LIBUSB_1_0
|
|
if ((!sdi->connection_id) && (sdi->inst_type == SR_INST_USB)) {
|
|
/* connection_id isn't populated, let's do that here. */
|
|
|
|
drvc = sdi->driver->context;
|
|
usb = sdi->conn;
|
|
|
|
if ((cnt = libusb_get_device_list(drvc->sr_ctx->libusb_ctx, &devlist)) < 0) {
|
|
sr_err("Failed to retrieve device list: %s.",
|
|
libusb_error_name(cnt));
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < cnt; i++) {
|
|
/* Find the USB device by the logical address we know. */
|
|
b = libusb_get_bus_number(devlist[i]);
|
|
a = libusb_get_device_address(devlist[i]);
|
|
if (b != usb->bus || a != usb->address)
|
|
continue;
|
|
|
|
usb_get_port_path(devlist[i], connection_id, sizeof(connection_id));
|
|
((struct sr_dev_inst *)sdi)->connection_id = g_strdup(connection_id);
|
|
break;
|
|
}
|
|
|
|
libusb_free_device_list(devlist, 1);
|
|
}
|
|
#endif
|
|
|
|
return sdi->connection_id;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' channel list.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The GSList of channels or NULL.
|
|
*/
|
|
SR_API GSList *sr_dev_inst_channels_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
return sdi->channels;
|
|
}
|
|
|
|
/**
|
|
* Queries a device instances' channel groups list.
|
|
*
|
|
* @param sdi Device instance to use. Must not be NULL.
|
|
*
|
|
* @return The GSList of channel groups or NULL.
|
|
*/
|
|
SR_API GSList *sr_dev_inst_channel_groups_get(const struct sr_dev_inst *sdi)
|
|
{
|
|
if (!sdi)
|
|
return NULL;
|
|
|
|
return sdi->channel_groups;
|
|
}
|
|
|
|
/** @} */
|