* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
*/
-/** @file
- * Standard API helper functions.
- * @internal
- */
+/**
+ * @file
+ *
+ * Standard API helper functions.
+ *
+ * @internal
+ */
#include <config.h>
#include <glib.h>
* It creates a new 'struct drv_context' (drvc), assigns sr_ctx to it, and
* then 'drvc' is assigned to the 'struct sr_dev_driver' (di) that is passed.
*
- * @param sr_ctx The libsigrok context to assign.
* @param di The driver instance to use.
- * @param[in] prefix A driver-specific prefix string used for log messages.
+ * @param sr_ctx The libsigrok context to assign.
*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments.
*/
-SR_PRIV int std_init(struct sr_context *sr_ctx, struct sr_dev_driver *di,
- const char *prefix)
+SR_PRIV int std_init(struct sr_dev_driver *di, struct sr_context *sr_ctx)
{
struct drv_context *drvc;
- if (!di) {
- sr_err("%s: Invalid driver, cannot initialize.", prefix);
- return SR_ERR_ARG;
- }
-
drvc = g_malloc0(sizeof(struct drv_context));
drvc->sr_ctx = sr_ctx;
drvc->instances = NULL;
return SR_OK;
}
+/**
+ * Standard driver cleanup() callback API helper
+ *
+ * @param di The driver instance to use.
+ *
+ * Frees all device instances by calling sr_dev_clear() and then releases any
+ * resources allocated by std_init().
+ *
+ * @retval SR_OK Success
+ * @retval SR_ERR_ARG Invalid driver
+ *
+*/
+SR_PRIV int std_cleanup(const struct sr_dev_driver *di)
+{
+ int ret;
+
+ ret = sr_dev_clear(di);
+ g_free(di->context);
+
+ return ret;
+}
+
/**
* Standard API helper for sending an SR_DF_HEADER packet.
*
* dev_acquisition_start() API callback.
*
* @param sdi The device instance to use.
- * @param prefix A driver-specific prefix string used for log messages.
- * Must not be NULL. An empty string is allowed.
*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
* SR_ERR upon other errors.
*/
-SR_PRIV int std_session_send_df_header(const struct sr_dev_inst *sdi,
- const char *prefix)
+SR_PRIV int std_session_send_df_header(const struct sr_dev_inst *sdi)
{
+ const char *prefix = (sdi->driver) ? sdi->driver->name : "unknown";
int ret;
struct sr_datafeed_packet packet;
struct sr_datafeed_header header;
- if (!prefix) {
- sr_err("Invalid prefix.");
- return SR_ERR_ARG;
- }
-
sr_dbg("%s: Starting acquisition.", prefix);
/* Send header packet to the session bus. */
* Standard API helper for sending an SR_DF_END packet.
*
* @param sdi The device instance to use. Must not be NULL.
- * @param prefix A driver-specific prefix string used for log messages.
- * Must not be NULL. An empty string is allowed.
*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or
* SR_ERR upon other errors.
*/
-SR_PRIV int std_session_send_df_end(const struct sr_dev_inst *sdi,
- const char *prefix)
+SR_PRIV int std_session_send_df_end(const struct sr_dev_inst *sdi)
{
+ const char *prefix = (sdi->driver) ? sdi->driver->name : "unknown";
int ret;
struct sr_datafeed_packet packet;
- if (!sdi || !prefix)
+ if (!sdi)
return SR_ERR_ARG;
sr_dbg("%s: Sending SR_DF_END packet.", prefix);
*
* @param sdi The device instance for which acquisition should stop.
* Must not be NULL.
- * @param cb_data Opaque 'cb_data' pointer. Must not be NULL.
- * @param dev_close_fn Function pointer to the driver's dev_close().
- * Must not be NULL.
- * @param serial The serial device instance (struct serial_dev_inst *).
- * Must not be NULL.
- * @param[in] prefix A driver-specific prefix string used for log messages.
- * Must not be NULL. An empty string is allowed.
*
* @retval SR_OK Success.
* @retval SR_ERR_ARG Invalid arguments.
* @retval SR_ERR_DEV_CLOSED Device is closed.
* @retval SR_ERR Other errors.
*/
-SR_PRIV int std_serial_dev_acquisition_stop(struct sr_dev_inst *sdi,
- dev_close_callback dev_close_fn,
- struct sr_serial_dev_inst *serial, const char *prefix)
+SR_PRIV int std_serial_dev_acquisition_stop(struct sr_dev_inst *sdi)
{
+ struct sr_serial_dev_inst *serial = sdi->conn;
+ const char *prefix = sdi->driver->name;
int ret;
- if (!prefix) {
- sr_err("Invalid prefix.");
- return SR_ERR_ARG;
- }
-
if (sdi->status != SR_ST_ACTIVE) {
sr_err("%s: Device inactive, can't stop acquisition.", prefix);
return SR_ERR_DEV_CLOSED;
return ret;
}
- if ((ret = dev_close_fn(sdi)) < 0) {
+ if ((ret = sdi->driver->dev_close(sdi)) < 0) {
sr_err("%s: Failed to close device: %d.", prefix, ret);
return ret;
}
- std_session_send_df_end(sdi, prefix);
+ std_session_send_df_end(sdi);
return SR_OK;
}
return ret;
}
+
+/**
+ * Standard implementation for the driver dev_list() callback
+ *
+ * This function can be used as the dev_list callback by most drivers that use
+ * the standard helper functions. It returns the devices contained in the driver
+ * context instances list.
+ *
+ * @param di The driver instance to use.
+ *
+ * @return The list of devices/instances of this driver, or NULL upon errors
+ * or if the list is empty.
+ */
+SR_PRIV GSList *std_dev_list(const struct sr_dev_driver *di)
+{
+ struct drv_context *drvc = di->context;
+
+ return drvc->instances;
+}
+
+/**
+ * Standard scan() callback API helper.
+ *
+ * This function can be used to perform common tasks required by a driver's
+ * scan() callback. It will initialize the driver for each device on the list
+ * and add the devices on the list to the driver's device instance list.
+ * Usually it should be used as the last step in the scan() callback, right
+ * before returning.
+ *
+ * Note: This function can only be used if std_init() has been called
+ * previously by the driver.
+ *
+ * Example:
+ * @code{c}
+ * static GSList *scan(struct sr_dev_driver *di, GSList *options)
+ * {
+ * struct GSList *device;
+ * struct sr_dev_inst *sdi;
+ *
+ * sdi = g_new0(sr_dev_inst, 1);
+ * sdi->vendor = ...;
+ * ...
+ * devices = g_slist_append(devices, sdi);
+ * ...
+ * return std_scan_complete(di, devices);
+ * }
+ * @endcode
+ *
+ * @param di The driver instance to use. Must not be NULL.
+ * @param devices List of newly discovered devices (struct sr_dev_inst).
+ *
+ * @return The @p devices list.
+ */
+SR_PRIV GSList *std_scan_complete(struct sr_dev_driver *di, GSList *devices)
+{
+ struct drv_context *drvc;
+ GSList *l;
+
+ if (!di) {
+ sr_err("Invalid driver instance (di), cannot complete scan.");
+ return NULL;
+ }
+
+ drvc = di->context;
+
+ for (l = devices; l; l = l->next) {
+ struct sr_dev_inst *sdi = l->data;
+ if (!sdi) {
+ sr_err("Invalid driver instance, cannot complete scan.");
+ return NULL;
+ }
+ sdi->driver = di;
+ }
+
+ drvc->instances = g_slist_concat(drvc->instances, g_slist_copy(devices));
+
+ return devices;
+}