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ALSA: fireface: add protocol-dependent operation to get clock status
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This commit adds a member for a callback function to get clock status
to former protocol.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Takashi Sakamoto authored and Takashi Iwai committed Jan 21, 2019
1 parent ae3053c commit b1d0cb0
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Showing 5 changed files with 71 additions and 70 deletions.
2 changes: 1 addition & 1 deletion sound/firewire/fireface/ff-pcm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -152,7 +152,7 @@ static int pcm_open(struct snd_pcm_substream *substream)
if (err < 0)
goto release_lock;

err = snd_ff_transaction_get_clock(ff, &rate, &src);
err = ff->spec->protocol->get_clock(ff, &rate, &src);
if (err < 0)
goto release_lock;

Expand Down
68 changes: 67 additions & 1 deletion sound/firewire/fireface/ff-protocol-former.c
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Original file line number Diff line number Diff line change
Expand Up @@ -12,6 +12,70 @@
#define FORMER_REG_SYNC_STATUS 0x0000801c0000ull
/* For block write request. */
#define FORMER_REG_FETCH_PCM_FRAMES 0x0000801c0000ull
#define FORMER_REG_CLOCK_CONFIG 0x0000801c0004ull

static int former_get_clock(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src)
{
__le32 reg;
u32 data;
int err;

err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
FORMER_REG_CLOCK_CONFIG, &reg, sizeof(reg), 0);
if (err < 0)
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;
}

static int former_switch_fetching_mode(struct snd_ff *ff, bool enable)
{
Expand Down Expand Up @@ -56,7 +120,7 @@ static void dump_clock_config(struct snd_ff *ff, struct snd_info_buffer *buffer)
int err;

err = snd_fw_transaction(ff->unit, TCODE_READ_BLOCK_REQUEST,
SND_FF_REG_CLOCK_CONFIG, &reg, sizeof(reg), 0);
FORMER_REG_CLOCK_CONFIG, &reg, sizeof(reg), 0);
if (err < 0)
return;

Expand Down Expand Up @@ -383,6 +447,7 @@ static void ff800_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)

const struct snd_ff_protocol snd_ff_protocol_ff800 = {
.handle_midi_msg = ff800_handle_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
.begin_session = ff800_begin_session,
.finish_session = ff800_finish_session,
Expand Down Expand Up @@ -532,6 +597,7 @@ static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)

const struct snd_ff_protocol snd_ff_protocol_ff400 = {
.handle_midi_msg = ff400_handle_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
.begin_session = ff400_begin_session,
.finish_session = ff400_finish_session,
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2 changes: 1 addition & 1 deletion sound/firewire/fireface/ff-stream.c
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Original file line number Diff line number Diff line change
Expand Up @@ -113,7 +113,7 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
if (ff->substreams_counter == 0)
return 0;

err = snd_ff_transaction_get_clock(ff, &curr_rate, &src);
err = ff->spec->protocol->get_clock(ff, &curr_rate, &src);
if (err < 0)
return err;
if (curr_rate != rate ||
Expand Down
63 changes: 0 additions & 63 deletions sound/firewire/fireface/ff-transaction.c
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Original file line number Diff line number Diff line change
Expand Up @@ -11,69 +11,6 @@
#define SND_FF_REG_MIDI_RX_PORT_0 0x000080180000ull
#define SND_FF_REG_MIDI_RX_PORT_1 0x000080190000ull

int snd_ff_transaction_get_clock(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src)
{
__le32 reg;
u32 data;
int err;

err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
SND_FF_REG_CLOCK_CONFIG, &reg, sizeof(reg), 0);
if (err < 0)
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;
}

static void finish_transmit_midi_msg(struct snd_ff *ff, unsigned int port,
int rcode)
{
Expand Down
6 changes: 2 additions & 4 deletions sound/firewire/fireface/ff.h
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Original file line number Diff line number Diff line change
Expand Up @@ -35,8 +35,6 @@
#define SND_FF_IN_MIDI_PORTS 2
#define SND_FF_OUT_MIDI_PORTS 2

#define SND_FF_REG_CLOCK_CONFIG 0x0000801c0004ull

enum snd_ff_stream_mode {
SND_FF_STREAM_MODE_LOW = 0,
SND_FF_STREAM_MODE_MID,
Expand Down Expand Up @@ -106,6 +104,8 @@ enum snd_ff_clock_src {

struct snd_ff_protocol {
void (*handle_midi_msg)(struct snd_ff *ff, __le32 *buf, size_t length);
int (*get_clock)(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src);
int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);
int (*begin_session)(struct snd_ff *ff, unsigned int rate);
void (*finish_session)(struct snd_ff *ff);
Expand All @@ -115,8 +115,6 @@ struct snd_ff_protocol {
extern const struct snd_ff_protocol snd_ff_protocol_ff800;
extern const struct snd_ff_protocol snd_ff_protocol_ff400;

int snd_ff_transaction_get_clock(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src);
int snd_ff_transaction_register(struct snd_ff *ff);
int snd_ff_transaction_reregister(struct snd_ff *ff);
void snd_ff_transaction_unregister(struct snd_ff *ff);
Expand Down

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