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ALSA: fireface: add protocol-dependent operation to switch mode to fetch PCM frame
This commit adds a member for a callback function to switch frame fetching mode to former protocol. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
parent
e9e29cf852
commit
ae3053c28b
3 changed files with 41 additions and 38 deletions
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@ -10,6 +10,42 @@
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#include "ff.h"
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#define FORMER_REG_SYNC_STATUS 0x0000801c0000ull
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/* For block write request. */
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#define FORMER_REG_FETCH_PCM_FRAMES 0x0000801c0000ull
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static int former_switch_fetching_mode(struct snd_ff *ff, bool enable)
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{
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unsigned int count;
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__le32 *reg;
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int i;
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int err;
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count = 0;
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for (i = 0; i < SND_FF_STREAM_MODE_COUNT; ++i)
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count = max(count, ff->spec->pcm_playback_channels[i]);
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reg = kcalloc(count, sizeof(__le32), GFP_KERNEL);
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if (!reg)
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return -ENOMEM;
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if (!enable) {
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/*
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* Each quadlet is corresponding to data channels in a data
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* blocks in reverse order. Precisely, quadlets for available
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* data channels should be enabled. Here, I take second best
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* to fetch PCM frames from all of data channels regardless of
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* stf.
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*/
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for (i = 0; i < count; ++i)
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reg[i] = cpu_to_le32(0x00000001);
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}
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err = snd_fw_transaction(ff->unit, TCODE_WRITE_BLOCK_REQUEST,
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FORMER_REG_FETCH_PCM_FRAMES, reg,
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sizeof(__le32) * count, 0);
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kfree(reg);
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return err;
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}
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static void dump_clock_config(struct snd_ff *ff, struct snd_info_buffer *buffer)
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{
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@ -347,6 +383,7 @@ static void ff800_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)
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const struct snd_ff_protocol snd_ff_protocol_ff800 = {
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.handle_midi_msg = ff800_handle_midi_msg,
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.switch_fetching_mode = former_switch_fetching_mode,
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.begin_session = ff800_begin_session,
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.finish_session = ff800_finish_session,
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.dump_status = former_dump_status,
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@ -495,6 +532,7 @@ static void ff400_handle_midi_msg(struct snd_ff *ff, __le32 *buf, size_t length)
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const struct snd_ff_protocol snd_ff_protocol_ff400 = {
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.handle_midi_msg = ff400_handle_midi_msg,
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.switch_fetching_mode = former_switch_fetching_mode,
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.begin_session = ff400_begin_session,
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.finish_session = ff400_finish_session,
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.dump_status = former_dump_status,
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@ -37,44 +37,10 @@ static void release_resources(struct snd_ff *ff)
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fw_iso_resources_free(&ff->rx_resources);
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}
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static int switch_fetching_mode(struct snd_ff *ff, bool enable)
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{
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unsigned int count;
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__le32 *reg;
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int i;
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int err;
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count = 0;
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for (i = 0; i < SND_FF_STREAM_MODE_COUNT; ++i)
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count = max(count, ff->spec->pcm_playback_channels[i]);
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reg = kcalloc(count, sizeof(__le32), GFP_KERNEL);
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if (!reg)
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return -ENOMEM;
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if (!enable) {
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/*
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* Each quadlet is corresponding to data channels in a data
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* blocks in reverse order. Precisely, quadlets for available
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* data channels should be enabled. Here, I take second best
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* to fetch PCM frames from all of data channels regardless of
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* stf.
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*/
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for (i = 0; i < count; ++i)
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reg[i] = cpu_to_le32(0x00000001);
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}
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err = snd_fw_transaction(ff->unit, TCODE_WRITE_BLOCK_REQUEST,
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SND_FF_REG_FETCH_PCM_FRAMES, reg,
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sizeof(__le32) * count, 0);
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kfree(reg);
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return err;
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}
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static inline void finish_session(struct snd_ff *ff)
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{
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ff->spec->protocol->finish_session(ff);
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switch_fetching_mode(ff, false);
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ff->spec->protocol->switch_fetching_mode(ff, false);
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}
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static int init_stream(struct snd_ff *ff, enum amdtp_stream_direction dir)
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@ -206,7 +172,7 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
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goto error;
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}
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err = switch_fetching_mode(ff, true);
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err = ff->spec->protocol->switch_fetching_mode(ff, true);
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if (err < 0)
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goto error;
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}
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@ -35,8 +35,6 @@
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#define SND_FF_IN_MIDI_PORTS 2
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#define SND_FF_OUT_MIDI_PORTS 2
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/* For block write request. */
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#define SND_FF_REG_FETCH_PCM_FRAMES 0x0000801c0000ull
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#define SND_FF_REG_CLOCK_CONFIG 0x0000801c0004ull
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enum snd_ff_stream_mode {
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@ -108,6 +106,7 @@ enum snd_ff_clock_src {
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struct snd_ff_protocol {
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void (*handle_midi_msg)(struct snd_ff *ff, __le32 *buf, size_t length);
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int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);
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int (*begin_session)(struct snd_ff *ff, unsigned int rate);
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void (*finish_session)(struct snd_ff *ff);
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void (*dump_status)(struct snd_ff *ff, struct snd_info_buffer *buffer);
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