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Diffstat (limited to 'sound/firewire/bebob/bebob_focusrite.c')
-rw-r--r--sound/firewire/bebob/bebob_focusrite.c62
1 files changed, 48 insertions, 14 deletions
diff --git a/sound/firewire/bebob/bebob_focusrite.c b/sound/firewire/bebob/bebob_focusrite.c
index 45a0eed6d5b1..3b052ed0fbf5 100644
--- a/sound/firewire/bebob/bebob_focusrite.c
+++ b/sound/firewire/bebob/bebob_focusrite.c
@@ -27,12 +27,14 @@
#define SAFFIRE_CLOCK_SOURCE_INTERNAL 0
#define SAFFIRE_CLOCK_SOURCE_SPDIF 1
-/* '1' is absent, why... */
+/* clock sources as returned from register of Saffire Pro 10 and 26 */
#define SAFFIREPRO_CLOCK_SOURCE_INTERNAL 0
+#define SAFFIREPRO_CLOCK_SOURCE_SKIP 1 /* never used on hardware */
#define SAFFIREPRO_CLOCK_SOURCE_SPDIF 2
-#define SAFFIREPRO_CLOCK_SOURCE_ADAT1 3
-#define SAFFIREPRO_CLOCK_SOURCE_ADAT2 4
+#define SAFFIREPRO_CLOCK_SOURCE_ADAT1 3 /* not used on s.pro. 10 */
+#define SAFFIREPRO_CLOCK_SOURCE_ADAT2 4 /* not used on s.pro. 10 */
#define SAFFIREPRO_CLOCK_SOURCE_WORDCLOCK 5
+#define SAFFIREPRO_CLOCK_SOURCE_COUNT 6
/* S/PDIF, ADAT1, ADAT2 is enabled or not. three quadlets */
#define SAFFIREPRO_ENABLE_DIG_IFACES 0x01a4
@@ -101,13 +103,34 @@ saffire_write_quad(struct snd_bebob *bebob, u64 offset, u32 value)
&data, sizeof(__be32), 0);
}
+static char *const saffirepro_10_clk_src_labels[] = {
+ SND_BEBOB_CLOCK_INTERNAL, "S/PDIF", "Word Clock"
+};
static char *const saffirepro_26_clk_src_labels[] = {
SND_BEBOB_CLOCK_INTERNAL, "S/PDIF", "ADAT1", "ADAT2", "Word Clock"
};
-
-static char *const saffirepro_10_clk_src_labels[] = {
- SND_BEBOB_CLOCK_INTERNAL, "S/PDIF", "Word Clock"
+/* Value maps between registers and labels for SaffirePro 10/26. */
+static const signed char saffirepro_clk_maps[][SAFFIREPRO_CLOCK_SOURCE_COUNT] = {
+ /* SaffirePro 10 */
+ [0] = {
+ [SAFFIREPRO_CLOCK_SOURCE_INTERNAL] = 0,
+ [SAFFIREPRO_CLOCK_SOURCE_SKIP] = -1, /* not supported */
+ [SAFFIREPRO_CLOCK_SOURCE_SPDIF] = 1,
+ [SAFFIREPRO_CLOCK_SOURCE_ADAT1] = -1, /* not supported */
+ [SAFFIREPRO_CLOCK_SOURCE_ADAT2] = -1, /* not supported */
+ [SAFFIREPRO_CLOCK_SOURCE_WORDCLOCK] = 2,
+ },
+ /* SaffirePro 26 */
+ [1] = {
+ [SAFFIREPRO_CLOCK_SOURCE_INTERNAL] = 0,
+ [SAFFIREPRO_CLOCK_SOURCE_SKIP] = -1, /* not supported */
+ [SAFFIREPRO_CLOCK_SOURCE_SPDIF] = 1,
+ [SAFFIREPRO_CLOCK_SOURCE_ADAT1] = 2,
+ [SAFFIREPRO_CLOCK_SOURCE_ADAT2] = 3,
+ [SAFFIREPRO_CLOCK_SOURCE_WORDCLOCK] = 4,
+ }
};
+
static int
saffirepro_both_clk_freq_get(struct snd_bebob *bebob, unsigned int *rate)
{
@@ -138,24 +161,35 @@ saffirepro_both_clk_freq_set(struct snd_bebob *bebob, unsigned int rate)
return saffire_write_quad(bebob, SAFFIREPRO_RATE_NOREBOOT, id);
}
+
+/*
+ * query hardware for current clock source, return our internally
+ * used clock index in *id, depending on hardware.
+ */
static int
saffirepro_both_clk_src_get(struct snd_bebob *bebob, unsigned int *id)
{
int err;
- u32 value;
+ u32 value; /* clock source read from hw register */
+ const signed char *map;
err = saffire_read_quad(bebob, SAFFIREPRO_OFFSET_CLOCK_SOURCE, &value);
if (err < 0)
goto end;
- if (bebob->spec->clock->labels == saffirepro_10_clk_src_labels) {
- if (value == SAFFIREPRO_CLOCK_SOURCE_WORDCLOCK)
- *id = 2;
- else if (value == SAFFIREPRO_CLOCK_SOURCE_SPDIF)
- *id = 1;
- } else if (value > 1) {
- *id = value - 1;
+ /* depending on hardware, use a different mapping */
+ if (bebob->spec->clock->labels == saffirepro_10_clk_src_labels)
+ map = saffirepro_clk_maps[0];
+ else
+ map = saffirepro_clk_maps[1];
+
+ /* In a case that this driver cannot handle the value of register. */
+ if (value >= SAFFIREPRO_CLOCK_SOURCE_COUNT || map[value] < 0) {
+ err = -EIO;
+ goto end;
}
+
+ *id = (unsigned int)map[value];
end:
return err;
}