ols: add swap channels feature

Allow channel groups to be swapped. This is useful
for demux at 200mhz with the unbuffered channels.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>

hardware/openbench-logic-sniffer/api.c

@@ -34,6 +34,7 @@ static const int32_t hwcaps[] = {
 	SR_CONF_LIMIT_SAMPLES,
 	SR_CONF_EXTERNAL_CLOCK,
 	SR_CONF_PATTERN_MODE,
+	SR_CONF_SWAP,
 	SR_CONF_RLE,
 };
 
@@ -325,6 +326,17 @@ static int config_set(int id, GVariant *data, const struct sr_dev_inst *sdi)
 			ret = SR_ERR;
 		}
 		break;
+	case SR_CONF_SWAP:
+		if (g_variant_get_boolean(data)) {
+			sr_info("Enabling channel swapping.");
+			devc->flag_reg |= FLAG_SWAP_PROBES;
+		} else {
+			sr_info("Disabling channel swapping.");
+			devc->flag_reg &= ~FLAG_SWAP_PROBES;
+		}
+		ret = SR_OK;
+		break;
+
 	case SR_CONF_RLE:
 		if (g_variant_get_boolean(data)) {
 			sr_info("Enabling RLE.");

hardware/openbench-logic-sniffer/protocol.h

@@ -75,6 +75,7 @@
 #define FLAG_CLOCK_EXTERNAL        0x40
 #define FLAG_CLOCK_INVERTED        0x80
 #define FLAG_RLE                   0x0100
+#define FLAG_SWAP_PROBES           0x0200
 #define FLAG_EXTERNAL_TEST_MODE    0x0400
 #define FLAG_INTERNAL_TEST_MODE    0x0800
 

hwdriver.c

@@ -65,6 +65,8 @@ static struct sr_config_info sr_config_info_data[] = {
 		"Trigger types", NULL},
 	{SR_CONF_EXTERNAL_CLOCK, SR_T_BOOL, "external_clock",
 		"External clock mode", NULL},
+	{SR_CONF_SWAP, SR_T_BOOL, "swap",
+		"Swap channel order", NULL},
 	{SR_CONF_RLE, SR_T_BOOL, "rle",
 		"Run Length Encoding", NULL},
 	{SR_CONF_TRIGGER_SLOPE, SR_T_UINT64, "triggerslope",

libsigrok.h

@@ -631,6 +631,11 @@ enum {
 	/** The devices supports using a external clock. */
 	SR_CONF_EXTERNAL_CLOCK,
 
+	/** The device supports swapping channels. Typical this is between
+	 *  buffered and unbuffered channels.
+	 */
+	SR_CONF_SWAP,
+
 	/** The device supports Run Length Encoding. */
 	SR_CONF_RLE,