From 3713d93a6a12f8629c2660bb4a30d48b98105fca Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Sat, 29 Nov 2014 00:59:28 +0900 Subject: ALSA: oxfw: Split PCM functionality to a new file This is a help for works in followed patches. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/oxfw/oxfw-pcm.c | 249 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 249 insertions(+) create mode 100644 sound/firewire/oxfw/oxfw-pcm.c (limited to 'sound/firewire/oxfw/oxfw-pcm.c') diff --git a/sound/firewire/oxfw/oxfw-pcm.c b/sound/firewire/oxfw/oxfw-pcm.c new file mode 100644 index 000000000000..d39f17a8f8c0 --- /dev/null +++ b/sound/firewire/oxfw/oxfw-pcm.c @@ -0,0 +1,249 @@ +/* + * oxfw_pcm.c - a part of driver for OXFW970/971 based devices + * + * Copyright (c) Clemens Ladisch + * Licensed under the terms of the GNU General Public License, version 2. + */ + +#include "oxfw.h" + +static int firewave_rate_constraint(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + static unsigned int stereo_rates[] = { 48000, 96000 }; + struct snd_interval *channels = + hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); + struct snd_interval *rate = + hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + + /* two channels work only at 48/96 kHz */ + if (snd_interval_max(channels) < 6) + return snd_interval_list(rate, 2, stereo_rates, 0); + return 0; +} + +static int firewave_channels_constraint(struct snd_pcm_hw_params *params, + struct snd_pcm_hw_rule *rule) +{ + static const struct snd_interval all_channels = { .min = 6, .max = 6 }; + struct snd_interval *rate = + hw_param_interval(params, SNDRV_PCM_HW_PARAM_RATE); + struct snd_interval *channels = + hw_param_interval(params, SNDRV_PCM_HW_PARAM_CHANNELS); + + /* 32/44.1 kHz work only with all six channels */ + if (snd_interval_max(rate) < 48000) + return snd_interval_refine(channels, &all_channels); + return 0; +} + +int firewave_constraints(struct snd_pcm_runtime *runtime) +{ + static unsigned int channels_list[] = { 2, 6 }; + static struct snd_pcm_hw_constraint_list channels_list_constraint = { + .count = 2, + .list = channels_list, + }; + int err; + + runtime->hw.rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_96000; + runtime->hw.channels_max = 6; + + err = snd_pcm_hw_constraint_list(runtime, 0, + SNDRV_PCM_HW_PARAM_CHANNELS, + &channels_list_constraint); + if (err < 0) + return err; + err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, + firewave_rate_constraint, NULL, + SNDRV_PCM_HW_PARAM_CHANNELS, -1); + if (err < 0) + return err; + err = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, + firewave_channels_constraint, NULL, + SNDRV_PCM_HW_PARAM_RATE, -1); + if (err < 0) + return err; + + return 0; +} + +int lacie_speakers_constraints(struct snd_pcm_runtime *runtime) +{ + runtime->hw.rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000; + + return 0; +} + +static int pcm_open(struct snd_pcm_substream *substream) +{ + static const struct snd_pcm_hardware hardware = { + .info = SNDRV_PCM_INFO_MMAP | + SNDRV_PCM_INFO_MMAP_VALID | + SNDRV_PCM_INFO_BATCH | + SNDRV_PCM_INFO_INTERLEAVED | + SNDRV_PCM_INFO_BLOCK_TRANSFER, + .formats = AMDTP_OUT_PCM_FORMAT_BITS, + .channels_min = 2, + .channels_max = 2, + .buffer_bytes_max = 4 * 1024 * 1024, + .period_bytes_min = 1, + .period_bytes_max = UINT_MAX, + .periods_min = 1, + .periods_max = UINT_MAX, + }; + struct snd_oxfw *oxfw = substream->private_data; + struct snd_pcm_runtime *runtime = substream->runtime; + bool used; + int err; + + err = cmp_connection_check_used(&oxfw->in_conn, &used); + if ((err < 0) || used) + goto end; + + runtime->hw = hardware; + + err = oxfw->device_info->pcm_constraints(runtime); + if (err < 0) + goto end; + err = snd_pcm_limit_hw_rates(runtime); + if (err < 0) + goto end; + + err = amdtp_stream_add_pcm_hw_constraints(&oxfw->rx_stream, runtime); +end: + return err; +} + +static int pcm_close(struct snd_pcm_substream *substream) +{ + return 0; +} + +static int pcm_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *hw_params) +{ + struct snd_oxfw *oxfw = substream->private_data; + int err; + + mutex_lock(&oxfw->mutex); + + snd_oxfw_stream_stop_simplex(oxfw); + + err = snd_pcm_lib_alloc_vmalloc_buffer(substream, + params_buffer_bytes(hw_params)); + if (err < 0) + goto error; + + amdtp_stream_set_parameters(&oxfw->rx_stream, + params_rate(hw_params), + params_channels(hw_params), + 0); + + amdtp_stream_set_pcm_format(&oxfw->rx_stream, + params_format(hw_params)); + + err = avc_general_set_sig_fmt(oxfw->unit, params_rate(hw_params), + AVC_GENERAL_PLUG_DIR_IN, 0); + if (err < 0) { + dev_err(&oxfw->unit->device, "failed to set sample rate\n"); + goto err_buffer; + } + + return 0; + +err_buffer: + snd_pcm_lib_free_vmalloc_buffer(substream); +error: + mutex_unlock(&oxfw->mutex); + return err; +} + +static int pcm_hw_free(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + + mutex_lock(&oxfw->mutex); + snd_oxfw_stream_stop_simplex(oxfw); + mutex_unlock(&oxfw->mutex); + + return snd_pcm_lib_free_vmalloc_buffer(substream); +} + +static int pcm_prepare(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + int err; + + mutex_lock(&oxfw->mutex); + + snd_oxfw_stream_stop_simplex(oxfw); + + err = snd_oxfw_stream_start_simplex(oxfw); + if (err < 0) + goto end; + + amdtp_stream_pcm_prepare(&oxfw->rx_stream); +end: + mutex_unlock(&oxfw->mutex); + return err; +} + +static int pcm_trigger(struct snd_pcm_substream *substream, int cmd) +{ + struct snd_oxfw *oxfw = substream->private_data; + struct snd_pcm_substream *pcm; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + pcm = substream; + break; + case SNDRV_PCM_TRIGGER_STOP: + pcm = NULL; + break; + default: + return -EINVAL; + } + amdtp_stream_pcm_trigger(&oxfw->rx_stream, pcm); + return 0; +} + +static snd_pcm_uframes_t pcm_pointer(struct snd_pcm_substream *substream) +{ + struct snd_oxfw *oxfw = substream->private_data; + + return amdtp_stream_pcm_pointer(&oxfw->rx_stream); +} + +int snd_oxfw_create_pcm(struct snd_oxfw *oxfw) +{ + static struct snd_pcm_ops ops = { + .open = pcm_open, + .close = pcm_close, + .ioctl = snd_pcm_lib_ioctl, + .hw_params = pcm_hw_params, + .hw_free = pcm_hw_free, + .prepare = pcm_prepare, + .trigger = pcm_trigger, + .pointer = pcm_pointer, + .page = snd_pcm_lib_get_vmalloc_page, + .mmap = snd_pcm_lib_mmap_vmalloc, + }; + struct snd_pcm *pcm; + int err; + + err = snd_pcm_new(oxfw->card, oxfw->card->driver, 0, 1, 0, &pcm); + if (err < 0) + return err; + pcm->private_data = oxfw; + strcpy(pcm->name, oxfw->card->shortname); + snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &ops); + return 0; +} -- cgit v1.2.3