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ALSA: fireface: share helper function to get current sampling rate and clock source
As long as investigating packet dumps from Fireface 400/800, bits on status registers for clock synchronization are the same. This commit moves a parser for a register of clock configuration to obsolete model-specific operations. Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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parent
72f10f08b6
commit
3c3b892b37
5 changed files with 63 additions and 64 deletions
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@ -141,7 +141,7 @@ static int pcm_open(struct snd_pcm_substream *substream)
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if (err < 0)
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goto release_lock;
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err = ff->spec->protocol->get_clock(ff, &rate, &src);
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err = snd_ff_transaction_get_clock(ff, &rate, &src);
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if (err < 0)
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goto release_lock;
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@ -19,65 +19,6 @@
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#define FF400_MIDI_RX_PORT_0 0x000080180000ull
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#define FF400_MIDI_RX_PORT_1 0x000080190000ull
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static int ff400_get_clock(struct snd_ff *ff, unsigned int *rate,
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enum snd_ff_clock_src *src)
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{
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__le32 reg;
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u32 data;
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int err;
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err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
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SND_FF_REG_CLOCK_CONFIG, ®, sizeof(reg), 0);
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if (err < 0)
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return err;
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data = le32_to_cpu(reg);
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/* Calculate sampling rate. */
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switch ((data >> 1) & 0x03) {
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case 0x01:
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*rate = 32000;
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break;
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case 0x00:
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*rate = 44100;
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break;
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case 0x03:
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*rate = 48000;
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break;
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case 0x02:
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default:
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return -EIO;
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}
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if (data & 0x08)
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*rate *= 2;
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else if (data & 0x10)
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*rate *= 4;
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/* Calculate source of clock. */
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if (data & 0x01) {
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*src = SND_FF_CLOCK_SRC_INTERNAL;
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} else {
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/* TODO: 0x00, 0x01, 0x02, 0x06, 0x07? */
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switch ((data >> 10) & 0x07) {
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case 0x03:
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*src = SND_FF_CLOCK_SRC_SPDIF;
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break;
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case 0x04:
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*src = SND_FF_CLOCK_SRC_WORD;
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break;
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case 0x05:
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*src = SND_FF_CLOCK_SRC_LTC;
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break;
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case 0x00:
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default:
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*src = SND_FF_CLOCK_SRC_ADAT;
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break;
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}
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}
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return 0;
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}
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static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
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{
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__le32 reg;
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@ -169,7 +110,6 @@ static int ff400_switch_fetching_mode(struct snd_ff *ff, bool enable)
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}
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const struct snd_ff_protocol snd_ff_protocol_ff400 = {
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.get_clock = ff400_get_clock,
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.begin_session = ff400_begin_session,
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.finish_session = ff400_finish_session,
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.switch_fetching_mode = ff400_switch_fetching_mode,
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@ -149,7 +149,7 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
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if (ff->substreams_counter == 0)
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return 0;
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err = ff->spec->protocol->get_clock(ff, &curr_rate, &src);
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err = snd_ff_transaction_get_clock(ff, &curr_rate, &src);
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if (err < 0)
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return err;
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if (curr_rate != rate ||
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@ -8,6 +8,65 @@
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#include "ff.h"
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int snd_ff_transaction_get_clock(struct snd_ff *ff, unsigned int *rate,
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enum snd_ff_clock_src *src)
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{
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__le32 reg;
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u32 data;
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int err;
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err = snd_fw_transaction(ff->unit, TCODE_READ_QUADLET_REQUEST,
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SND_FF_REG_CLOCK_CONFIG, ®, sizeof(reg), 0);
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if (err < 0)
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return err;
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data = le32_to_cpu(reg);
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/* Calculate sampling rate. */
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switch ((data >> 1) & 0x03) {
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case 0x01:
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*rate = 32000;
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break;
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case 0x00:
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*rate = 44100;
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break;
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case 0x03:
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*rate = 48000;
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break;
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case 0x02:
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default:
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return -EIO;
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}
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if (data & 0x08)
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*rate *= 2;
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else if (data & 0x10)
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*rate *= 4;
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/* Calculate source of clock. */
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if (data & 0x01) {
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*src = SND_FF_CLOCK_SRC_INTERNAL;
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} else {
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/* TODO: 0x00, 0x01, 0x02, 0x06, 0x07? */
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switch ((data >> 10) & 0x07) {
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case 0x03:
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*src = SND_FF_CLOCK_SRC_SPDIF;
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break;
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case 0x04:
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*src = SND_FF_CLOCK_SRC_WORD;
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break;
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case 0x05:
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*src = SND_FF_CLOCK_SRC_LTC;
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break;
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case 0x00:
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default:
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*src = SND_FF_CLOCK_SRC_ADAT;
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break;
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}
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}
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return 0;
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}
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static void finish_transmit_midi_msg(struct snd_ff *ff, unsigned int port,
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int rcode)
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{
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@ -101,8 +101,6 @@ enum snd_ff_clock_src {
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};
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struct snd_ff_protocol {
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int (*get_clock)(struct snd_ff *ff, unsigned int *rate,
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enum snd_ff_clock_src *src);
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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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int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);
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@ -114,6 +112,8 @@ struct snd_ff_protocol {
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extern const struct snd_ff_protocol snd_ff_protocol_ff400;
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int snd_ff_transaction_get_clock(struct snd_ff *ff, unsigned int *rate,
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enum snd_ff_clock_src *src);
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int snd_ff_transaction_register(struct snd_ff *ff);
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int snd_ff_transaction_reregister(struct snd_ff *ff);
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void snd_ff_transaction_unregister(struct snd_ff *ff);
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