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authorTakashi Sakamoto <o-takashi@sakamocchi.jp>2019-01-20 17:25:52 +0900
committerTakashi Iwai <tiwai@suse.de>2019-01-21 15:12:23 +0100
commit4c4871a8055a1ff95fbd415d426d7e1d4b763edb (patch)
treed151627408a8f756df3bb6cc1db72fc71434ac05 /sound/firewire
parent22f745871408a58223e2f87e3d4e43d10229e61a (diff)
downloadlinux-stericsson-4c4871a8055a1ff95fbd415d426d7e1d4b763edb.tar.gz
ALSA: fireface: code refactoring to parse of clock configuration
A procedure to retrieve clock configuration is used by two callers. Each of caller has duplicated code to parse bits. This commit adds refactoring to remove the duplicated code. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire')
-rw-r--r--sound/firewire/fireface/ff-proc.c17
-rw-r--r--sound/firewire/fireface/ff-protocol-former.c172
-rw-r--r--sound/firewire/fireface/ff.h1
3 files changed, 89 insertions, 101 deletions
diff --git a/sound/firewire/fireface/ff-proc.c b/sound/firewire/fireface/ff-proc.c
index 8a7cfb6ccce6..a55e68ec1832 100644
--- a/sound/firewire/fireface/ff-proc.c
+++ b/sound/firewire/fireface/ff-proc.c
@@ -8,6 +8,23 @@
#include "./ff.h"
+const char *snd_ff_proc_get_clk_label(enum snd_ff_clock_src src)
+{
+ static const char *const labels[] = {
+ "Internal",
+ "S/PDIF",
+ "ADAT1",
+ "ADAT2",
+ "Word",
+ "LTC",
+ };
+
+ if (src >= ARRAY_SIZE(labels))
+ return NULL;
+
+ return labels[src];
+}
+
static void proc_dump_status(struct snd_info_entry *entry,
struct snd_info_buffer *buffer)
{
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c
index fb2af10d2690..9c0ae50e88d1 100644
--- a/sound/firewire/fireface/ff-protocol-former.c
+++ b/sound/firewire/fireface/ff-protocol-former.c
@@ -14,6 +14,62 @@
#define FORMER_REG_FETCH_PCM_FRAMES 0x0000801c0000ull
#define FORMER_REG_CLOCK_CONFIG 0x0000801c0004ull
+static int parse_clock_bits(u32 data, unsigned int *rate,
+ enum snd_ff_clock_src *src)
+{
+ static const struct {
+ unsigned int rate;
+ u32 mask;
+ } *rate_entry, rate_entries[] = {
+ { 32000, 0x00000002, },
+ { 44100, 0x00000000, },
+ { 48000, 0x00000006, },
+ { 64000, 0x0000000a, },
+ { 88200, 0x00000008, },
+ { 96000, 0x0000000e, },
+ { 128000, 0x00000012, },
+ { 176400, 0x00000010, },
+ { 192000, 0x00000016, },
+ };
+ static const struct {
+ enum snd_ff_clock_src src;
+ u32 mask;
+ } *clk_entry, clk_entries[] = {
+ { SND_FF_CLOCK_SRC_ADAT1, 0x00000000, },
+ { SND_FF_CLOCK_SRC_ADAT2, 0x00000400, },
+ { SND_FF_CLOCK_SRC_SPDIF, 0x00000c00, },
+ { SND_FF_CLOCK_SRC_WORD, 0x00001000, },
+ { SND_FF_CLOCK_SRC_LTC, 0x00001800, },
+ };
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(rate_entries); ++i) {
+ rate_entry = rate_entries + i;
+ if ((data & 0x0000001e) == rate_entry->mask) {
+ *rate = rate_entry->rate;
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(rate_entries))
+ return -EIO;
+
+ if (data & 0x00000001) {
+ *src = SND_FF_CLOCK_SRC_INTERNAL;
+ } else {
+ for (i = 0; i < ARRAY_SIZE(clk_entries); ++i) {
+ clk_entry = clk_entries + i;
+ if ((data & 0x00001c00) == clk_entry->mask) {
+ *src = clk_entry->src;
+ break;
+ }
+ }
+ if (i == ARRAY_SIZE(clk_entries))
+ return -EIO;
+ }
+
+ return 0;
+}
+
static int former_get_clock(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src)
{
@@ -27,54 +83,7 @@ static int former_get_clock(struct snd_ff *ff, unsigned int *rate,
return err;
data = le32_to_cpu(reg);
- /* Calculate sampling rate. */
- switch ((data >> 1) & 0x03) {
- case 0x01:
- *rate = 32000;
- break;
- case 0x00:
- *rate = 44100;
- break;
- case 0x03:
- *rate = 48000;
- break;
- case 0x02:
- default:
- return -EIO;
- }
-
- if (data & 0x08)
- *rate *= 2;
- else if (data & 0x10)
- *rate *= 4;
-
- /* Calculate source of clock. */
- if (data & 0x01) {
- *src = SND_FF_CLOCK_SRC_INTERNAL;
- } else {
- /* TODO: 0x02, 0x06, 0x07? */
- switch ((data >> 10) & 0x07) {
- case 0x00:
- *src = SND_FF_CLOCK_SRC_ADAT1;
- break;
- case 0x01:
- *src = SND_FF_CLOCK_SRC_ADAT2;
- break;
- case 0x03:
- *src = SND_FF_CLOCK_SRC_SPDIF;
- break;
- case 0x04:
- *src = SND_FF_CLOCK_SRC_WORD;
- break;
- case 0x05:
- *src = SND_FF_CLOCK_SRC_LTC;
- break;
- default:
- return -EIO;
- }
- }
-
- return 0;
+ return parse_clock_bits(data, rate, src);
}
static int former_switch_fetching_mode(struct snd_ff *ff, bool enable)
@@ -116,76 +125,37 @@ static void dump_clock_config(struct snd_ff *ff, struct snd_info_buffer *buffer)
__le32 reg;
u32 data;
unsigned int rate;
- const char *src;
+ enum snd_ff_clock_src src;
+ const char *label;
int err;
err = snd_fw_transaction(ff->unit, TCODE_READ_BLOCK_REQUEST,
FORMER_REG_CLOCK_CONFIG, &reg, sizeof(reg), 0);
if (err < 0)
return;
-
data = le32_to_cpu(reg);
snd_iprintf(buffer, "Output S/PDIF format: %s (Emphasis: %s)\n",
- (data & 0x20) ? "Professional" : "Consumer",
- (data & 0x40) ? "on" : "off");
+ (data & 0x00000020) ? "Professional" : "Consumer",
+ (data & 0x00000040) ? "on" : "off");
snd_iprintf(buffer, "Optical output interface format: %s\n",
- ((data >> 8) & 0x01) ? "S/PDIF" : "ADAT");
+ (data & 0x00000100) ? "S/PDIF" : "ADAT");
snd_iprintf(buffer, "Word output single speed: %s\n",
- ((data >> 8) & 0x20) ? "on" : "off");
+ (data & 0x00002000) ? "on" : "off");
snd_iprintf(buffer, "S/PDIF input interface: %s\n",
- ((data >> 8) & 0x02) ? "Optical" : "Coaxial");
-
- switch ((data >> 1) & 0x03) {
- case 0x01:
- rate = 32000;
- break;
- case 0x00:
- rate = 44100;
- break;
- case 0x03:
- rate = 48000;
- break;
- case 0x02:
- default:
- return;
- }
-
- if (data & 0x08)
- rate *= 2;
- else if (data & 0x10)
- rate *= 4;
-
- snd_iprintf(buffer, "Sampling rate: %d\n", rate);
+ (data & 0x00000200) ? "Optical" : "Coaxial");
- if (data & 0x01) {
- src = "Internal";
- } else {
- switch ((data >> 10) & 0x07) {
- case 0x00:
- src = "ADAT1";
- break;
- case 0x01:
- src = "ADAT2";
- break;
- case 0x03:
- src = "S/PDIF";
- break;
- case 0x04:
- src = "Word";
- break;
- case 0x05:
- src = "LTC";
- break;
- default:
- return;
- }
- }
+ err = parse_clock_bits(data, &rate, &src);
+ if (err < 0)
+ return;
+ label = snd_ff_proc_get_clk_label(src);
+ if (!label)
+ return;
- snd_iprintf(buffer, "Sync to clock source: %s\n", src);
+ snd_iprintf(buffer, "Clock configuration: %d %s\n", rate, label);
}
static void dump_sync_status(struct snd_ff *ff, struct snd_info_buffer *buffer)
diff --git a/sound/firewire/fireface/ff.h b/sound/firewire/fireface/ff.h
index 1de2f5ec26fd..cdb16e931c31 100644
--- a/sound/firewire/fireface/ff.h
+++ b/sound/firewire/fireface/ff.h
@@ -139,6 +139,7 @@ int snd_ff_stream_lock_try(struct snd_ff *ff);
void snd_ff_stream_lock_release(struct snd_ff *ff);
void snd_ff_proc_init(struct snd_ff *ff);
+const char *snd_ff_proc_get_clk_label(enum snd_ff_clock_src src);
int snd_ff_create_midi_devices(struct snd_ff *ff);