| /linux/Documentation/sound/cards/ |
| H A D | cmipci.rst | 2 Brief Notes on C-Media 8338/8738/8768/8770 Driver
8 Front/Rear Multi-channel Playback
9 ---------------------------------
12 channels can be used for front/rear playbacks. Since there are two
13 DACs, both streams are handled independently unlike the 4/6ch multi-
18 (hw:0,1) is assigned to the second DAC for rear playback.
22 - The first DAC supports U8 and S16LE formats, while the second DAC
24 - The second DAC supports only two channel stereo.
26 Please note that the CM8x38 DAC doesn't support continuous playback
44 on and "double DAC" mode. Actually I could hear separate 4 channels
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| H A D | emu-mixer.rst | 2 E-MU Digital Audio System mixer / default DSP code
5 This document covers the E-MU 0404/1010/1212/1616/1820 PCI/PCI-e/CardBus
9 alternative front-end geared towards semi-professional studio recording.
11 This document is based on audigy-mixer.rst.
22 In particular, I got recording glitches during simultaneous playback on an
33 This driver supports only 16-bit 44.1/48 kHz operation. The multi-channel
34 device (see emu10k1-jack.rst) additionally supports 24-bit capture.
37 <https://github.com/ossilator/linux/tree/ossis-emu10k1>`_.
38 Its multi-channel device supports 24-bit for both playback and capture,
62 FX-bus
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| H A D | audiophile-usb.rst | 2 Guide to using M-Audio Audiophile USB with ALSA and Jack
9 This document is a guide to using the M-Audio Audiophile USB (tm) device with
15 * v1.4 - Thibault Le Meur (2007-07-11)
17 - Added Low Endianness nature of 16bits-modes
19 - Modifying document structure
21 * v1.5 - Thibault Le Meur (2007-07-12)
22 - Added AC3/DTS passthru info
35 - This port supports 2 pairs of line-level audio inputs (1/4" TS and RCA)
36 - When the 1/4" TS (jack) connectors are connected, the RCA connectors
57 * 16-bit/48kHz ==> 4 channels in + 4 channels out
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| H A D | hdspm.rst | 2 Software Interface ALSA-DSP MADI Driver
5 (translated from German, so no good English ;-),
7 2004 - winfried ritsch
11 the Controls and startup-options are ALSA-Standard and only the
19 ------------------
21 * number of channels -- depends on transmission mode
23 The number of channels chosen is from 1..Nmax. The reason to
24 use for a lower number of channels is only resource allocation,
25 since unused DMA channels are disabled and less memory is
29 * Single Speed -- 1..64 channels
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| /linux/sound/soc/sh/ |
| H A D | rz-ssi.c | 1 // SPDX-License-Identifier: GPL-2.0
3 // Renesas RZ/G2L ASoC Serial Sound Interface (SSIF-2) Driver
74 #define SSI_RATES SNDRV_PCM_RATE_8000_48000 /* 8k-44.1kHz */
117 * The SSI supports full-duplex transmission and reception.
120 * So it is better to use as half-duplex (playing and recording
121 * should be done on separate channels).
123 struct rz_ssi_stream playback; member
138 unsigned int channels; member
148 writel(data, (priv->base + reg)); in rz_ssi_reg_writel()
153 return readl(priv->base + reg); in rz_ssi_reg_readl()
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| /linux/Documentation/ABI/testing/ |
| H A D | configfs-usb-gadget-uac1 | 1 What: /config/usb-gadget/gadget/functions/uac1.name
9 c_srate list of capture sampling rates (comma-separated)
19 p_chmask playback channel mask
20 p_srate list of playback sampling rates (comma-separated)
21 p_ssize playback sample size (bytes)
22 p_mute_present playback mute control enable
23 p_volume_present playback volume control enable
24 p_volume_min playback volume control min value
26 p_volume_max playback volume control max value
28 p_volume_res playback volume control resolution
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| /linux/sound/soc/amd/ |
| H A D | acp.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
13 /* Playback and Capture Offset for Stoney */
26 * playback and SRAM Bank 2 for capture where as in case of BT I2S
27 * Instance, Stoney uses SRAM Bank 3 for playback & SRAM Bank 4 will
29 * 1, 2, 3, 4 will be used for playback & SRAM Banks 5, 6, 7, 8 will be used
73 /* Playback DMA channels */
77 /* Capture DMA channels */
81 /* Playback DMA Channels for I2S BT instance */
85 /* Capture DMA Channels for I2S BT Instance */
89 /* Playback DMA channels for I2S MICSP instance */
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| /linux/Documentation/devicetree/bindings/sound/ |
| H A D | rockchip-i2s.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/sound/rockchip-i2s.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 The I2S bus (Inter-IC sound bus) is a serial link for digital
14 - Heiko Stuebner <heiko@sntech.de>
17 - $ref: dai-common.yaml#
22 - const: rockchip,rk3066-i2s
23 - items:
24 - enum:
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| H A D | xlnx,i2s.txt | 1 Device-Tree bindings for Xilinx I2S PL block
3 The IP supports I2S based playback/capture audio
6 - compatible: "xlnx,i2s-transmitter-1.0" for playback and
7 "xlnx,i2s-receiver-1.0" for capture
9 Required property common to both I2S playback and capture:
10 - reg: Base address and size of the IP core instance.
11 - xlnx,dwidth: sample data width. Can be any of 16, 24.
12 - xlnx,num-channels: Number of I2S streams. Can be any of 1, 2, 3, 4.
13 supported channels = 2 * xlnx,num-channels
18 compatible = "xlnx,i2s-receiver-1.0";
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| H A D | simple-card.yaml | 1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/sound/simple-card.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
14 frame-master:
15 description: Indicates dai-link frame master.
18 bitclock-master:
19 description: Indicates dai-link bit clock master
22 frame-inversion:
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| H A D | fsl,ssi.yaml | 1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Shengjiu Wang <shengjiu.wang@nxp.com>
13 Notes on fsl,playback-dma and fsl,capture-dma
14 On SOCs that have an SSI, specific DMA channels are hard-wired for playback
16 playback and DMA channel 1 for capture. SSI2 must use DMA channel 2 for
17 playback and DMA channel 3 for capture. The developer can choose which
18 DMA controller to use, but the channels themselves are hard-wired. The
21 The device tree nodes for the DMA channels that are referenced by
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| /linux/drivers/usb/gadget/function/ |
| H A D | u_uac1_legacy.c | 1 // SPDX-License-Identifier: GPL-2.0+
3 * u_uac1.c -- ALSA audio utilities for Gadget stack
24 /*-------------------------------------------------------------------------*/
47 changed = -EINVAL; in _snd_pcm_hw_param_set()
53 val--; in _snd_pcm_hw_param_set()
60 changed = -EINVAL; in _snd_pcm_hw_param_set()
71 t.min = val - 1; in _snd_pcm_hw_param_set()
80 return -EINVAL; in _snd_pcm_hw_param_set()
82 params->cmask |= 1 << var; in _snd_pcm_hw_param_set()
83 params->rmask |= 1 << var; in _snd_pcm_hw_param_set()
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| /linux/sound/soc/xilinx/ |
| H A D | xlnx_i2s.c | 1 // SPDX-License-Identifier: GPL-2.0
32 u32 channels; member
44 return -EINVAL; in xlnx_i2s_set_sclkout_div()
46 drv_data->sysclk = 0; in xlnx_i2s_set_sclkout_div()
48 writel(div, drv_data->base + I2S_I2STIM_OFFSET); in xlnx_i2s_set_sclkout_div()
58 drv_data->sysclk = freq; in xlnx_i2s_set_sysclk()
62 if (drv_data->is_32bit_lrclk) in xlnx_i2s_set_sysclk()
65 bits_per_sample = drv_data->data_width; in xlnx_i2s_set_sysclk()
67 drv_data->ratnum.num = freq / (bits_per_sample * drv_data->channels) / 2; in xlnx_i2s_set_sysclk()
68 drv_data->ratnum.den_step = 1; in xlnx_i2s_set_sysclk()
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| /linux/sound/soc/mediatek/mt8195/ |
| H A D | mt8195-dai-etdm.c | 1 // SPDX-License-Identifier: GPL-2.0
14 #include "mt8195-afe-clk.h"
15 #include "mt8195-afe-common.h"
16 #include "mt8195-reg.h"
117 int cowork_slv_id[MT8195_AFE_IO_ETDM_NUM - 1]; //dai_id
180 return -EINVAL; in get_etdm_fs_timing()
183 static unsigned int get_etdm_ch_fixup(unsigned int channels) in get_etdm_ch_fixup() argument
185 if (channels > 16) in get_etdm_ch_fixup()
187 else if (channels > 8) in get_etdm_ch_fixup()
189 else if (channels > 4) in get_etdm_ch_fixup()
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| /linux/sound/soc/codecs/ |
| H A D | hdmi-codec.c | 1 // SPDX-License-Identifier: GPL-2.0-only
4 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/
16 #include <sound/hdmi-codec.h>
22 #define HDMI_CODEC_CHMAP_IDX_UNKNOWN -1
60 { .channels = 2,
65 /* Channel maps for multi-channel playbacks, up to 8 n_ch */
67 { .channels = 2, /* CA_ID 0x00 */
69 { .channels = 4, /* CA_ID 0x01 */
72 { .channels = 4, /* CA_ID 0x02 */
75 { .channels = 4, /* CA_ID 0x03 */
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| H A D | ad193x.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
30 * AD193X volume/mute/de-emphasis etc. controls
37 static const DECLARE_TLV_DB_MINMAX(adau193x_tlv, -9563, 0);
67 /* DAC de-emphasis */
68 SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
78 /* ADC high-pass filter */
84 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
105 struct snd_soc_component *component = snd_soc_dapm_to_component(source->dapm); in ad193x_check_pll()
108 return !!ad193x->sysclk; in ad193x_check_pll()
131 switch (ad193x->type) { in ad193x_has_adc()
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| /linux/Documentation/sound/designs/ |
| H A D | control-names.rst | 8 ---------------
16 Playback one direction
18 Bypass Playback one direction
33 <nothing> channel independent, or applies to all channels
34 Front front left/right channels
36 CLFE C/LFE channels
68 Headset Mic mic part of combined headset jack - 4-pin
70 Headphone Mic mic part of either/or - 3-pin headphone or mic
79 Analog Loopback D/A -> A/D loopback
80 Digital Loopback playback -> capture loopback -
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| H A D | oss-emulation.rst | 2 Notes on Kernel OSS-Emulation
13 as add-on kernel modules, snd-pcm-oss, snd-mixer-oss and snd-seq-oss.
18 is called. The alias is defined ``sound-service-x-y``, where x and y are
22 Only necessary step for auto-loading of OSS modules is to define the
25 alias sound-slot-0 snd-emu10k1
27 As the second card, define ``sound-slot-1`` as well.
29 ``alias sound-slot-0 snd-card-0`` doesn't work any more like the old
38 after the corresponding OSS-emulation module is loaded. Don't worry
79 snd-pcm-oss and snd-rawmidi. In the case of PCM, the following
80 options are available for snd-pcm-oss:
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| /linux/sound/isa/gus/ |
| H A D | gusmax.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
25 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX; /* Index 0-MAX */
32 static int joystick_dac[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 29};
33 /* 0 to 31, (0.59V-4.52V or 0.389V-2.98V) */
34 static int channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 24}; variable
35 static int pcm_channels[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 2};
52 MODULE_PARM_DESC(joystick_dac, "Joystick DAC level 0.59V-4.52V or 0.389V-2.98V for GUS MAX driver."…
53 module_param_array(channels, int, NULL, 0444);
54 MODULE_PARM_DESC(channels, "Used GF1 channels for GUS MAX driver.");
56 MODULE_PARM_DESC(pcm_channels, "Reserved PCM channels for GUS MAX driver.");
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| /linux/sound/usb/misc/ |
| H A D | ua101.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Edirol UA-101/UA-1000 driver
19 MODULE_DESCRIPTION("Edirol UA-101/1000 driver");
32 * This magic value optimizes memory usage efficiency for the UA-101's packet
55 __stringify(MIN_QUEUE_LENGTH)"-"__stringify(MAX_QUEUE_LENGTH));
92 /* FIFO to synchronize playback rate to capture rate */
105 unsigned int channels; member
121 } capture, playback; member
134 case -ENODEV: in usb_error_string()
136 case -ENOENT: in usb_error_string()
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| /linux/sound/soc/tegra/ |
| H A D | tegra210_i2s.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 // tegra210_i2s.c - Tegra210 I2S driver
44 regmap_write(regmap, TEGRA210_I2S_SLOT_CTRL, total_slots - 1); in tegra210_i2s_set_slot_ctrl()
56 regmap_read(i2s->regmap, TEGRA210_I2S_CTRL, &val); in tegra210_i2s_set_clock_rate()
62 err = clk_set_rate(i2s->clk_i2s, clock_rate); in tegra210_i2s_set_clock_rate()
69 if (!IS_ERR(i2s->clk_sync_input)) { in tegra210_i2s_set_clock_rate()
75 err = clk_set_rate(i2s->clk_sync_input, clock_rate); in tegra210_i2s_set_clock_rate()
90 struct device *dev = compnt->dev; in tegra210_i2s_sw_reset()
109 regmap_read(i2s->regmap, cif_reg, &cif_ctrl); in tegra210_i2s_sw_reset()
110 regmap_read(i2s->regmap, stream_reg, &stream_ctrl); in tegra210_i2s_sw_reset()
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| /linux/sound/firewire/dice/ |
| H A D | dice-pcm.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * dice_pcm.c - a part of driver for DICE based devices
6 * Copyright (c) 2014 Takashi Sakamoto <o-takashi@sakamocchi.jp>
14 struct snd_pcm_substream *substream = rule->private; in dice_rate_constraint()
15 struct snd_dice *dice = substream->private_data; in dice_rate_constraint()
16 unsigned int index = substream->pcm->device; in dice_rate_constraint()
29 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) in dice_rate_constraint()
30 pcm_channels = dice->tx_pcm_chs[index]; in dice_rate_constraint()
32 pcm_channels = dice->rx_pcm_chs[index]; in dice_rate_constraint()
52 struct snd_pcm_substream *substream = rule->private; in dice_channels_constraint()
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| /linux/tools/testing/selftests/alsa/conf.d/ |
| H A D | Lenovo_ThinkPad_P1_Gen2.conf | 38 # pcm.0.0 - device 0 subdevice 0
41 PLAYBACK {
43 access RW_INTERLEAVED # can be omitted - default
44 format S16_LE # can be omitted - default
45 rate 48000 # can be omitted - default
46 channels 2 # can be omitted - default
54 channels 2
62 channels 2
75 # PLAYBACK {
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| /linux/sound/usb/ |
| H A D | quirks-table.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
72 #define QUIRK_COMPOSITE_END { .ifnum = -1 }
127 /* Creative BT-D1 */
132 .channels = 2,
146 /* E-Mu 0202 USB */
148 /* E-Mu 0404 USB */
150 /* E-Mu Tracker Pre */
152 /* E-Mu 0204 USB */
171 .channels = 2,
203 /* Playback */
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| /linux/sound/soc/ti/ |
| H A D | davinci-i2s.c | 1 // SPDX-License-Identifier: GPL-2.0-only
9 * based on davinci-mcasp.c DT support
30 #include "edma-pcm.h"
31 #include "davinci-i2s.h"
33 #define DRV_NAME "davinci-i2s"
38 * - This driver supports the "Audio Serial Port" (ASP),
41 * - But it labels it a "Multi-channel Buffered Serial Port"
43 * backward-compatible, possibly explaining that confusion.
45 * - OMAP chips have a controller called McBSP, which is
48 * - Newer DaVinci chips have a controller called McASP,
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