diff options
Diffstat (limited to 'sound/firewire/dice/dice-stream.c')
-rw-r--r-- | sound/firewire/dice/dice-stream.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/sound/firewire/dice/dice-stream.c b/sound/firewire/dice/dice-stream.c index 8573289c381e..6c859d2b9084 100644 --- a/sound/firewire/dice/dice-stream.c +++ b/sound/firewire/dice/dice-stream.c @@ -30,6 +30,34 @@ const unsigned int snd_dice_rates[SND_DICE_RATES_COUNT] = { [6] = 192000, }; +int snd_dice_stream_get_rate_mode(struct snd_dice *dice, unsigned int rate, + enum snd_dice_rate_mode *mode) +{ + /* Corresponding to each entry in snd_dice_rates. */ + static const enum snd_dice_rate_mode modes[] = { + [0] = SND_DICE_RATE_MODE_LOW, + [1] = SND_DICE_RATE_MODE_LOW, + [2] = SND_DICE_RATE_MODE_LOW, + [3] = SND_DICE_RATE_MODE_MIDDLE, + [4] = SND_DICE_RATE_MODE_MIDDLE, + [5] = SND_DICE_RATE_MODE_HIGH, + [6] = SND_DICE_RATE_MODE_HIGH, + }; + int i; + + for (i = 0; i < ARRAY_SIZE(snd_dice_rates); i++) { + if (!(dice->clock_caps & BIT(i))) + continue; + if (snd_dice_rates[i] != rate) + continue; + + *mode = modes[i]; + return 0; + } + + return -EINVAL; +} + /* * This operation has an effect to synchronize GLOBAL_STATUS/GLOBAL_SAMPLE_RATE * to GLOBAL_STATUS. Especially, just after powering on, these are different. @@ -484,6 +512,64 @@ void snd_dice_stream_update_duplex(struct snd_dice *dice) } } +int snd_dice_stream_detect_current_formats(struct snd_dice *dice) +{ + unsigned int rate; + enum snd_dice_rate_mode mode; + __be32 reg[2]; + struct reg_params tx_params, rx_params; + int i; + int err; + + /* + * Available stream format is restricted at current mode of sampling + * clock. + */ + err = snd_dice_transaction_get_rate(dice, &rate); + if (err < 0) + return err; + + err = snd_dice_stream_get_rate_mode(dice, rate, &mode); + if (err < 0) + return err; + + /* + * Just after owning the unit (GLOBAL_OWNER), the unit can return + * invalid stream formats. Selecting clock parameters have an effect + * for the unit to refine it. + */ + err = ensure_phase_lock(dice); + if (err < 0) + return err; + + err = get_register_params(dice, &tx_params, &rx_params); + if (err < 0) + return err; + + for (i = 0; i < tx_params.count; ++i) { + err = snd_dice_transaction_read_tx(dice, + tx_params.size * i + TX_NUMBER_AUDIO, + reg, sizeof(reg)); + if (err < 0) + return err; + dice->tx_pcm_chs[i][mode] = be32_to_cpu(reg[0]); + dice->tx_midi_ports[i] = max_t(unsigned int, + be32_to_cpu(reg[1]), dice->tx_midi_ports[i]); + } + for (i = 0; i < rx_params.count; ++i) { + err = snd_dice_transaction_read_rx(dice, + rx_params.size * i + RX_NUMBER_AUDIO, + reg, sizeof(reg)); + if (err < 0) + return err; + dice->rx_pcm_chs[i][mode] = be32_to_cpu(reg[0]); + dice->rx_midi_ports[i] = max_t(unsigned int, + be32_to_cpu(reg[1]), dice->rx_midi_ports[i]); + } + + return 0; +} + static void dice_lock_changed(struct snd_dice *dice) { dice->dev_lock_changed = true; |