[PATCH] ALSA: fireface: fix to parse sync status register of latter protocol
Takashi Sakamoto
o-takashi at sakamocchi.jp
Sun Feb 7 16:47:36 CET 2021
Fireface UCX, UFX, and FF802 are categorized for latter protocol of the
series. Current support for FF802 (and UFX) includes failure to parse
sync status register and results in EIO.
Further investigation figures out that the content of register differs
depending on models. This commit adds tables specific to FF802 and UFX
to fix it.
Fixes: 062bb452b078b ("ALSA: fireface: add support for RME FireFace 802")
Cc: <stable at vger.kernel.org>
Signed-off-by: Takashi Sakamoto <o-takashi at sakamocchi.jp>
---
sound/firewire/fireface/ff-protocol-latter.c | 118 ++++++++++++++++---
1 file changed, 100 insertions(+), 18 deletions(-)
diff --git a/sound/firewire/fireface/ff-protocol-latter.c b/sound/firewire/fireface/ff-protocol-latter.c
index 8d3b23778eb2..7ddb7b97f02d 100644
--- 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, unsigned int *rate,
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, unsigned int *rate,
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 snd_ff *ff, struct snd_info_buffer *buffer
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 snd_ff *ff, struct snd_info_buffer *buffer
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) {
--
2.27.0
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