From 006f4f036b0a1643e4d942cf7e56760cde287f5b Mon Sep 17 00:00:00 2001
From: David Härdeman <david@hardeman.nu>
Date: Mon, 17 Apr 2017 11:32:30 +0200
Subject: Add hacked-up kernel protocol report support

---
 rcm-server-evdev.c | 42 ++++++++++++++++++++++++++++++------------
 1 file changed, 30 insertions(+), 12 deletions(-)

diff --git a/rcm-server-evdev.c b/rcm-server-evdev.c
index 3b76482..15ae5ff 100644
--- a/rcm-server-evdev.c
+++ b/rcm-server-evdev.c
@@ -37,6 +37,15 @@ struct rc_keymap_entry {
 };
 #define RKE_SIZE (sizeof(struct rc_scancode))
 
+static const char *
+evdev_get_protocol_name(__u16 protocol)
+{
+	if (protocol > ARRAY_SIZE(rc_protocols))
+		return NULL;
+
+	return rc_protocols[protocol];
+}
+
 static const char *
 evdev_guess_protocol(struct device *device, uint64_t scancode, uint32_t keycode)
 {
@@ -60,10 +69,7 @@ evdev_guess_protocol(struct device *device, uint64_t scancode, uint32_t keycode)
 		if (rke.keycode != keycode)
 			continue;
 
-		if (rke.rc.protocol > ARRAY_SIZE(rc_protocols))
-			return NULL;
-
-		return rc_protocols[rke.rc.protocol];
+		return evdev_get_protocol_name(rke.rc.protocol);
 	}
 
 	return NULL;
@@ -202,6 +208,8 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 	static bool pressed = false;
 	static uint32_t scancode;
 	static bool scancode_recv = false;
+	static uint32_t protocol;
+	static bool protocol_recv = false;
 	int r;
 
 	if (fd != device->evdev_fd)
@@ -261,21 +269,30 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 					printf("Reading from evdev - multiple scancodes?\n");
 				scancode_recv = true;
 				scancode = ev.value;
+			} else if (ev.code == MSC_RAW) {
+				if (protocol_recv)
+					printf("Reading from evdev - multiple protocols?\n");
+				protocol_recv = true;
+				protocol = ev.value;
 			}
 			break;
 
 		case EV_SYN:
 			if (keycode || scancode_recv) {
-				const char *protocol;
-
-				/* FIXME: protocol reporting needs kernel support */
-				if (scancode_recv)
-					protocol = evdev_guess_protocol(device, scancode, keycode ? keycode->value : KEY_RESERVED);
+				const char *protocol_name = NULL;
 
 				printf("evdev -");
 
+				/* FIXME: protocol reporting will change */
 				if (scancode_recv) {
-					printf(" protocol %s (guessed)", protocol);
+					if (!protocol_recv) {
+						protocol_name = evdev_guess_protocol(device, scancode, keycode ? keycode->value : KEY_RESERVED);
+						printf(" protocol %s (guessed)", protocol_name);
+					} else {
+						protocol_name = evdev_get_protocol_name(protocol);
+						printf(" protocol %s", protocol_name);
+					}
+
 					printf(" scancode 0x%08x", scancode);
 				}
 
@@ -286,12 +303,12 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 
 				printf("\n");
 
-				if (scancode_recv)
+				if (scancode_recv && protocol_name)
 					sd_bus_emit_signal(device->mgr->bus,
 							   device->path,
 							   "org.gnome.RemoteControlManager.Device",
 							   "KeyPressed",
-							   "sts", protocol ? protocol : "NEC", scancode,
+							   "sts", protocol_name, scancode,
 							   keycode ? keycode->name : "KEY_RESERVED");
 
 				else if (keycode && !pressed)
@@ -303,6 +320,7 @@ evdev_read(sd_event_source *s, int fd, uint32_t revents, void *userdata)
 			}
 
 			scancode_recv = false;
+			protocol_recv = false;
 			pressed = false;
 			keycode = NULL;
 			break;
-- 
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