ols: Properly initialize operational state before start

hardware/openbench-logic-sniffer/api.c

@@ -151,16 +151,23 @@ static GSList *hw_scan(GSList *options)
 		sdi = sr_dev_inst_new(0, SR_ST_INACTIVE,
 				"Sump", "Logic Analyzer", "v1.0");
 		sdi->driver = di;
-		devc = ols_dev_new();
 		for (i = 0; i < 32; i++) {
 			if (!(probe = sr_probe_new(i, SR_PROBE_LOGIC, TRUE,
 					ols_probe_names[i])))
 				return 0;
 			sdi->probes = g_slist_append(sdi->probes, probe);
 		}
+		devc = ols_dev_new();
 		sdi->priv = devc;
 	}
+	/* Configure samplerate and divider. */
+	if (ols_set_samplerate(sdi, DEFAULT_SAMPLERATE) != SR_OK)
+		sr_dbg("Failed to set default samplerate (%"PRIu64").",
+				DEFAULT_SAMPLERATE);
+	/* Clear trigger masks, values and stages. */
+	ols_configure_probes(sdi);
 	devc->serial = serial;
+
 	drvc->instances = g_slist_append(drvc->instances, sdi);
 	devices = g_slist_append(devices, sdi);
 
@@ -472,6 +479,9 @@ static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 	if (send_shortcommand(devc->serial, CMD_RUN) != SR_OK)
 		return SR_ERR;
 
+	/* Reset all operational states. */
+	devc->num_transfers = devc->num_samples = devc->num_bytes = 0;
+
 	/* Send header packet to the session bus. */
 	std_session_send_df_header(cb_data, DRIVER_LOG_DOMAIN);
 
@@ -481,7 +491,6 @@ static int hw_dev_acquisition_start(const struct sr_dev_inst *sdi,
 	return SR_OK;
 }
 
-/* TODO: This stops acquisition on ALL devices, ignoring dev_index. */
 static int hw_dev_acquisition_stop(struct sr_dev_inst *sdi, void *cb_data)
 {
 	/* Avoid compiler warnings. */

hardware/openbench-logic-sniffer/protocol.c

@@ -133,14 +133,20 @@ SR_PRIV struct dev_context *ols_dev_new(void)
 {
 	struct dev_context *devc;
 
-	if (!(devc = g_try_malloc0(sizeof(struct dev_context)))) {
+	if (!(devc = g_try_malloc(sizeof(struct dev_context)))) {
 		sr_err("Device context malloc failed.");
 		return NULL;
 	}
 
+	/* Device-specific settings */
+	devc->max_samples = devc->max_samplerate = devc->protocol_version = 0;
+
+	/* Acquisition settings */
+	devc->limit_samples = devc->capture_ratio = 0;
 	devc->trigger_at = -1;
 	devc->probe_mask = 0xffffffff;
-	devc->cur_samplerate = SR_KHZ(200);
+	devc->flag_reg = 0;
+
 	devc->serial = NULL;
 
 	return devc;

hardware/openbench-logic-sniffer/protocol.h

@@ -41,6 +41,7 @@
 #define SERIAL_SPEED           B115200
 #define CLOCK_RATE             SR_MHZ(100)
 #define MIN_NUM_SAMPLES        4
+#define DEFAULT_SAMPLERATE     SR_KHZ(200)
 
 /* Command opcodes */
 #define CMD_RESET                  0x00
@@ -76,34 +77,35 @@
 
 /* Private, per-device-instance driver context. */
 struct dev_context {
-	uint32_t max_samplerate;
+	struct sr_serial_dev_inst *serial;
+
+	/* Fixed device settings */
 	uint32_t max_samples;
+	uint32_t max_samplerate;
 	uint32_t protocol_version;
 
+	/* Acquisition settings */
 	uint64_t cur_samplerate;
 	uint32_t cur_samplerate_divider;
 	uint64_t limit_samples;
-	/* Current state of the flag register */
-	uint32_t flag_reg;
-
-	/* Pre/post trigger capture ratio, in percentage.
-	 * 0 means no pre-trigger data. */
 	int capture_ratio;
 	int trigger_at;
 	uint32_t probe_mask;
 	uint32_t trigger_mask[4];
 	uint32_t trigger_value[4];
 	int num_stages;
+	uint32_t flag_reg;
 
+	/* Operational states */
 	unsigned int num_transfers;
 	unsigned int num_samples;
-	int rle_count;
 	int num_bytes;
+
+	/* Temporary variables */
+	int rle_count;
 	unsigned char sample[4];
 	unsigned char tmp_sample[4];
 	unsigned char *raw_sample_buf;
-
-	struct sr_serial_dev_inst *serial;
 };