--- a/sound/firewire/fireface/ff-protocol-latter.c
+++ b/sound/firewire/fireface/ff-protocol-latter.c
@@ -15,6 +15,61 @@
 #define LATTER_FETCH_MODE	0xffff00000010ULL
 #define LATTER_SYNC_STATUS	0x0000801c0000ULL
 
+// The content of sync status register differs between models.
+//
+// Fireface UCX:
+//  0xf0000000: (unidentified)
+//  0x0f000000: effective rate of sampling clock
+//  0x00f00000: detected rate of word clock on BNC interface
+//  0x000f0000: detected rate of ADAT or S/PDIF on optical interface
+//  0x0000f000: detected rate of S/PDIF on coaxial interface
+//  0x00000e00: effective source of sampling clock
+//    0x00000e00: Internal
+//    0x00000800: (unidentified)
+//    0x00000600: Word clock on BNC interface
+//    0x00000400: ADAT on optical interface
+//    0x00000200: S/PDIF on coaxial or optical interface
+//  0x00000100: Optical interface is used for ADAT signal
+//  0x00000080: (unidentified)
+//  0x00000040: Synchronized to word clock on BNC interface
+//  0x00000020: Synchronized to ADAT or S/PDIF on optical interface
+//  0x00000010: Synchronized to S/PDIF on coaxial interface
+//  0x00000008: (unidentified)
+//  0x00000004: Lock word clock on BNC interface
+//  0x00000002: Lock ADAT or S/PDIF on optical interface
+//  0x00000001: Lock S/PDIF on coaxial interface
+//
+// Fireface 802 (and perhaps UFX):
+//   0xf0000000: effective rate of sampling clock
+//   0x0f000000: detected rate of ADAT-B on 2nd optical interface
+//   0x00f00000: detected rate of ADAT-A on 1st optical interface
+//   0x000f0000: detected rate of AES/EBU on XLR or coaxial interface
+//   0x0000f000: detected rate of word clock on BNC interface
+//   0x00000e00: effective source of sampling clock
+//     0x00000e00: internal
+//     0x00000800: ADAT-B
+//     0x00000600: ADAT-A
+//     0x00000400: AES/EBU
+//     0x00000200: Word clock
+//   0x00000080: Synchronized to ADAT-B on 2nd optical interface
+//   0x00000040: Synchronized to ADAT-A on 1st optical interface
+//   0x00000020: Synchronized to AES/EBU on XLR or 2nd optical interface
+//   0x00000010: Synchronized to word clock on BNC interface
+//   0x00000008: Lock ADAT-B on 2nd optical interface
+//   0x00000004: Lock ADAT-A on 1st optical interface
+//   0x00000002: Lock AES/EBU on XLR or 2nd optical interface
+//   0x00000001: Lock word clock on BNC interface
+//
+// The pattern for rate bits:
+//   0x00: 32.0 kHz
+//   0x01: 44.1 kHz
+//   0x02: 48.0 kHz
+//   0x04: 64.0 kHz
+//   0x05: 88.2 kHz
+//   0x06: 96.0 kHz
+//   0x08: 128.0 kHz
+//   0x09: 176.4 kHz
+//   0x0a: 192.0 kHz
 static int parse_clock_bits(u32 data, unsigned int *rate,
 			    enum snd_ff_clock_src *src,
 			    enum snd_ff_unit_version unit_version)
@@ -23,35 +78,48 @@ static int parse_clock_bits(u32 data, un
 		unsigned int rate;
 		u32 flag;
 	} *rate_entry, rate_entries[] = {
-		{ 32000,	0x00000000, },
-		{ 44100,	0x01000000, },
-		{ 48000,	0x02000000, },
-		{ 64000,	0x04000000, },
-		{ 88200,	0x05000000, },
-		{ 96000,	0x06000000, },
-		{ 128000,	0x08000000, },
-		{ 176400,	0x09000000, },
-		{ 192000,	0x0a000000, },
+		{ 32000,	0x00, },
+		{ 44100,	0x01, },
+		{ 48000,	0x02, },
+		{ 64000,	0x04, },
+		{ 88200,	0x05, },
+		{ 96000,	0x06, },
+		{ 128000,	0x08, },
+		{ 176400,	0x09, },
+		{ 192000,	0x0a, },
 	};
 	static const struct {
 		enum snd_ff_clock_src src;
 		u32 flag;
-	} *clk_entry, clk_entries[] = {
+	} *clk_entry, *clk_entries, ucx_clk_entries[] = {
 		{ SND_FF_CLOCK_SRC_SPDIF,	0x00000200, },
 		{ SND_FF_CLOCK_SRC_ADAT1,	0x00000400, },
 		{ SND_FF_CLOCK_SRC_WORD,	0x00000600, },
 		{ SND_FF_CLOCK_SRC_INTERNAL,	0x00000e00, },
+	}, ufx_ff802_clk_entries[] = {
+		{ SND_FF_CLOCK_SRC_WORD,	0x00000200, },
+		{ SND_FF_CLOCK_SRC_SPDIF,	0x00000400, },
+		{ SND_FF_CLOCK_SRC_ADAT1,	0x00000600, },
+		{ SND_FF_CLOCK_SRC_ADAT2,	0x00000800, },
+		{ SND_FF_CLOCK_SRC_INTERNAL,	0x00000e00, },
 	};
+	u32 rate_bits;
+	unsigned int clk_entry_count;
 	int i;
 
-	if (unit_version != SND_FF_UNIT_VERSION_UCX) {
-		// e.g. 0x00fe0f20 but expected 0x00eff002.
-		data = ((data & 0xf0f0f0f0) >> 4) | ((data & 0x0f0f0f0f) << 4);
+	if (unit_version == SND_FF_UNIT_VERSION_UCX) {
+		rate_bits = (data & 0x0f000000) >> 24;
+		clk_entries = ucx_clk_entries;
+		clk_entry_count = ARRAY_SIZE(ucx_clk_entries);
+	} else {
+		rate_bits = (data & 0xf0000000) >> 28;
+		clk_entries = ufx_ff802_clk_entries;
+		clk_entry_count = ARRAY_SIZE(ufx_ff802_clk_entries);
 	}
 
 	for (i = 0; i < ARRAY_SIZE(rate_entries); ++i) {
 		rate_entry = rate_entries + i;
-		if ((data & 0x0f000000) == rate_entry->flag) {
+		if (rate_bits == rate_entry->flag) {
 			*rate = rate_entry->rate;
 			break;
 		}
@@ -59,14 +127,14 @@ static int parse_clock_bits(u32 data, un
 	if (i == ARRAY_SIZE(rate_entries))
 		return -EIO;
 
-	for (i = 0; i < ARRAY_SIZE(clk_entries); ++i) {
+	for (i = 0; i < clk_entry_count; ++i) {
 		clk_entry = clk_entries + i;
 		if ((data & 0x000e00) == clk_entry->flag) {
 			*src = clk_entry->src;
 			break;
 		}
 	}
-	if (i == ARRAY_SIZE(clk_entries))
+	if (i == clk_entry_count)
 		return -EIO;
 
 	return 0;
@@ -249,16 +317,22 @@ static void latter_dump_status(struct sn
 		char *const label;
 		u32 locked_mask;
 		u32 synced_mask;
-	} *clk_entry, clk_entries[] = {
+	} *clk_entry, *clk_entries, ucx_clk_entries[] = {
 		{ "S/PDIF",	0x00000001, 0x00000010, },
 		{ "ADAT",	0x00000002, 0x00000020, },
 		{ "WDClk",	0x00000004, 0x00000040, },
+	}, ufx_ff802_clk_entries[] = {
+		{ "WDClk",	0x00000001, 0x00000010, },
+		{ "AES/EBU",	0x00000002, 0x00000020, },
+		{ "ADAT-A",	0x00000004, 0x00000040, },
+		{ "ADAT-B",	0x00000008, 0x00000080, },
 	};
 	__le32 reg;
 	u32 data;
 	unsigned int rate;
 	enum snd_ff_clock_src src;
 	const char *label;
+	unsigned int clk_entry_count;
 	int i;
 	int err;
 
@@ -270,7 +344,15 @@ static void latter_dump_status(struct sn
 
 	snd_iprintf(buffer, "External source detection:\n");
 
-	for (i = 0; i < ARRAY_SIZE(clk_entries); ++i) {
+	if (ff->unit_version == SND_FF_UNIT_VERSION_UCX) {
+		clk_entries = ucx_clk_entries;
+		clk_entry_count = ARRAY_SIZE(ucx_clk_entries);
+	} else {
+		clk_entries = ufx_ff802_clk_entries;
+		clk_entry_count = ARRAY_SIZE(ufx_ff802_clk_entries);
+	}
+
+	for (i = 0; i < clk_entry_count; ++i) {
 		clk_entry = clk_entries + i;
 		snd_iprintf(buffer, "%s: ", clk_entry->label);
 		if (data & clk_entry->locked_mask) {
