Initial GXFP5130 userspace prototype

examples/fdt-monitor.c

@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include "gxfp/device.h"
+#include "gxfp/fdt.h"
+#include "gxfp/protocol.h"
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const char *event_name(enum gxfp_fdt_event event)
+{
+	switch (event) {
+	case GXFP_FDT_EVENT_READY:
+		return "ready";
+	case GXFP_FDT_EVENT_FINGER_DOWN:
+		return "finger-down";
+	case GXFP_FDT_EVENT_FINGER_UP:
+		return "finger-up";
+	case GXFP_FDT_EVENT_REVERSE:
+		return "reverse";
+	default:
+		return "none";
+	}
+}
+
+int main(int argc, char **argv)
+{
+	const char *path = argc > 1 ? argv[1] : "/dev/gxfp";
+	struct gxfp_device device = { .fd = -1 };
+	struct gxfp_fdt fdt;
+	int ret;
+
+	ret = gxfp_device_open(&device, path);
+	if (ret) {
+		fprintf(stderr, "open failed: %s\n", strerror(-ret));
+		return EXIT_FAILURE;
+	}
+
+	ret = gxfp_device_flush_rx(&device);
+	if (ret)
+		fprintf(stderr, "warning: flush failed: %s\n", strerror(-ret));
+
+	gxfp_fdt_init(&fdt);
+
+	ret = gxfp_fdt_arm_down(&device);
+	if (ret) {
+		fprintf(stderr, "FDT arm failed: %s\n", strerror(-ret));
+		gxfp_device_close(&device);
+		return EXIT_FAILURE;
+	}
+
+	printf("FDT monitor active. Touch and release the sensor.\n");
+
+	for (;;) {
+		struct gxfp_rx_record record;
+		struct gxfp_frame_view frame;
+		enum gxfp_fdt_event event;
+		uint16_t status = 0;
+
+		ret = gxfp_device_receive(&device, &record, -1);
+		if (ret == -EINTR)
+			break;
+		if (ret) {
+			fprintf(stderr, "receive failed: %s\n", strerror(-ret));
+			break;
+		}
+
+		ret = gxfp_frame_parse(record.payload, record.payload_len, &frame);
+		if (ret) {
+			fprintf(stderr, "bad frame: %s\n", strerror(-ret));
+			gxfp_rx_record_release(&record);
+			continue;
+		}
+
+		if (frame.command == GXFP_GOODIX_ACK) {
+			gxfp_rx_record_release(&record);
+			continue;
+		}
+
+		event = gxfp_fdt_decode(&frame, &status);
+
+		printf("cmd=0x%02x status=0x%04x event=%s\n",
+		       frame.command, status, event_name(event));
+
+		ret = gxfp_fdt_handle_event(&fdt, &device, event);
+		gxfp_rx_record_release(&record);
+
+		if (ret) {
+			fprintf(stderr, "FDT transition failed: %s\n",
+				strerror(-ret));
+			break;
+		}
+	}
+
+	gxfp_device_close(&device);
+	return EXIT_SUCCESS;
+}