Some platforms may have support for offloading USB audio devices to a dedicated audio DSP. Introduce a set of APIs that allow for management of USB sound card and PCM devices enumerated by the USB SND class driver. This allows for the ASoC components to be aware of what USB devices are available for offloading.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- include/sound/soc-usb.h | 35 ++++++++ sound/soc/Makefile | 2 +- sound/soc/soc-usb.c | 180 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 216 insertions(+), 1 deletion(-) create mode 100644 include/sound/soc-usb.h create mode 100644 sound/soc/soc-usb.c

diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h new file mode 100644 index 000000000000..378992ea07bd --- /dev/null +++ b/include/sound/soc-usb.h @@ -0,0 +1,35 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef __LINUX_SND_SOC_USB_H +#define __LINUX_SND_SOC_USB_H + +/** + * struct snd_soc_usb + * @list - list head for SND SOC struct list + * @dev - USB backend device reference + * @component - reference to DAPM component + * @connection_status_cb - callback to notify connection events + * @priv_data - driver data + **/ +struct snd_soc_usb { + struct list_head list; + struct device *dev; + struct snd_soc_component *component; + int (*connection_status_cb)(struct snd_soc_usb *usb, int card_idx, + int connected); + void *priv_data; +}; + +int snd_soc_usb_connect(struct device *usbdev, int card_idx); +int snd_soc_usb_disconnect(struct device *usbdev); +void snd_soc_usb_set_priv_data(struct device *dev, void *priv); +void *snd_soc_usb_get_priv_data(struct device *usbdev); + +struct snd_soc_usb *snd_soc_usb_add_port(struct device *dev, void *priv, + int (*connection_cb)(struct snd_soc_usb *usb, int card_idx, + int connected)); +int snd_soc_usb_remove_port(struct device *dev); +#endif diff --git a/sound/soc/Makefile b/sound/soc/Makefile index 507eaed1d6a1..3305ceb59d84 100644 --- a/sound/soc/Makefile +++ b/sound/soc/Makefile @@ -1,5 +1,5 @@ # SPDX-License-Identifier: GPL-2.0 -snd-soc-core-objs := soc-core.o soc-dapm.o soc-jack.o soc-utils.o soc-dai.o soc-component.o +snd-soc-core-objs := soc-core.o soc-dapm.o soc-jack.o soc-usb.o soc-utils.o soc-dai.o soc-component.o snd-soc-core-objs += soc-pcm.o soc-devres.o soc-ops.o soc-link.o soc-card.o snd-soc-core-$(CONFIG_SND_SOC_COMPRESS) += soc-compress.o

diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c new file mode 100644 index 000000000000..4293451cdd49 --- /dev/null +++ b/sound/soc/soc-usb.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ +#include <linux/of.h> +#include <linux/usb.h> +#include <sound/soc.h> +#include <sound/soc-usb.h> +#include "../usb/card.h" + +static DEFINE_MUTEX(ctx_mutex); +static LIST_HEAD(usb_ctx_list); + +static struct device_node *snd_soc_find_phandle(struct device *dev) +{ + struct device_node *node; + + node = of_parse_phandle(dev->of_node, "usb-soc-be", 0); + if (!node) + return ERR_PTR(-ENODEV); + + return node; +} + +static struct snd_soc_usb *snd_soc_find_usb_ctx(struct device *dev) +{ + struct device_node *node; + struct snd_soc_usb *ctx = NULL; + + node = snd_soc_find_phandle(dev); + if (IS_ERR(node)) + return NULL; + + mutex_lock(&ctx_mutex); + list_for_each_entry(ctx, &usb_ctx_list, list) { + if (ctx->dev->of_node == node) { + of_node_put(node); + mutex_unlock(&ctx_mutex); + return ctx; + } + } + of_node_put(node); + mutex_unlock(&ctx_mutex); + + return NULL; +} + +/** + * snd_soc_usb_get_priv_data() - Retrieve private data stored + * @dev: device reference + * + * Fetch the private data stored in the USB SND SOC structure. + * + */ +void *snd_soc_usb_get_priv_data(struct device *dev) +{ + struct snd_soc_usb *ctx; + + ctx = snd_soc_find_usb_ctx(dev); + if (!ctx) { + /* Check if backend device */ + list_for_each_entry(ctx, &usb_ctx_list, list) { + if (dev->of_node == ctx->dev->of_node) + goto out; + } + ctx = NULL; + } +out: + return ctx ? ctx->priv_data : NULL; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_get_priv_data); + +/** + * snd_soc_usb_add_port() - Add a USB backend port + * @dev: USB backend device + * @priv: private data + * @connection_cb: connection status callback + * + * Register a USB backend device to the SND USB SOC framework. Memory is + * allocated as part of the USB backend device. + * + */ +struct snd_soc_usb *snd_soc_usb_add_port(struct device *dev, void *priv, + int (*connection_cb)(struct snd_soc_usb *usb, int card_idx, + int connected)) +{ + struct snd_soc_usb *usb; + + usb = devm_kzalloc(dev, sizeof(*usb), GFP_KERNEL); + if (!usb) + return ERR_PTR(-ENOMEM); + + usb->connection_status_cb = connection_cb; + usb->dev = dev; + usb->priv_data = priv; + + mutex_lock(&ctx_mutex); + list_add_tail(&usb->list, &usb_ctx_list); + mutex_unlock(&ctx_mutex); + + return usb; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_add_port); + +/** + * snd_soc_usb_remove_port() - Remove a USB backend port + * @dev: USB backend device + * + * Remove a USB backend device from USB SND SOC. Memory is freed when USB + * backend is removed. + * + */ +int snd_soc_usb_remove_port(struct device *dev) +{ + struct snd_soc_usb *ctx, *tmp; + + mutex_lock(&ctx_mutex); + list_for_each_entry_safe(ctx, tmp, &usb_ctx_list, list) { + if (ctx->dev == dev) { + list_del(&ctx->list); + break; + } + } + mutex_unlock(&ctx_mutex); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_remove_port); + +/** + * snd_soc_usb_connect() - Notification of USB device connection + * @usbdev: USB bus device + * @card_idx: USB SND card instance + * + * Notify of a new USB SND device connection. The card_idx can be used to + * handle how the USB backend selects, which device to enable offloading on. + * + */ +int snd_soc_usb_connect(struct device *usbdev, int card_idx) +{ + struct snd_soc_usb *ctx; + + if (!usbdev) + return -ENODEV; + + ctx = snd_soc_find_usb_ctx(usbdev); + if (!ctx) + return -ENODEV; + + if (ctx->connection_status_cb) + ctx->connection_status_cb(ctx, card_idx, 1); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_connect); + +/** + * snd_soc_usb_disconnect() - Notification of USB device disconnection + * @usbdev: USB bus device + * + * Notify of a new USB SND device disconnection to the USB backend. + * + */ +int snd_soc_usb_disconnect(struct device *usbdev) +{ + struct snd_soc_usb *ctx; + + if (!usbdev) + return -ENODEV; + + ctx = snd_soc_find_usb_ctx(usbdev); + if (!ctx) + return -ENODEV; + + if (ctx->connection_status_cb) + ctx->connection_status_cb(ctx, -1, 0); + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_disconnect);

Q6DSP supports handling of USB playback audio data if USB audio offloading is enabled. Add a new definition for the USB_RX AFE port, which is referenced when the AFE port is started.

Acked-by: Krzysztof Kozlowski krzysztof.kozlowski@linaro.org Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- include/dt-bindings/sound/qcom,q6dsp-lpass-ports.h | 1 + 1 file changed, 1 insertion(+)

diff --git a/include/dt-bindings/sound/qcom,q6dsp-lpass-ports.h b/include/dt-bindings/sound/qcom,q6dsp-lpass-ports.h index 9f7c5103bc82..746bc462bb2e 100644 --- a/include/dt-bindings/sound/qcom,q6dsp-lpass-ports.h +++ b/include/dt-bindings/sound/qcom,q6dsp-lpass-ports.h @@ -131,6 +131,7 @@ #define RX_CODEC_DMA_RX_7 126 #define QUINARY_MI2S_RX 127 #define QUINARY_MI2S_TX 128 +#define USB_RX 129

#define LPASS_CLK_ID_PRI_MI2S_IBIT 1 #define LPASS_CLK_ID_PRI_MI2S_EBIT 2

The QC ADSP is able to support USB playback endpoints, so that the main application processor can be placed into lower CPU power modes. This adds the required AFE port configurations and port start command to start an audio session.

Specifically, the QC ADSP can support all potential endpoints that are exposed by the audio data interface. This includes, feedback endpoints (both implicit and explicit) as well as the isochronous (data) endpoints. The size of audio samples sent per USB frame (microframe) will be adjusted based on information received on the feedback endpoint.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/soc/qcom/qdsp6/q6afe-dai.c | 50 ++++++ sound/soc/qcom/qdsp6/q6afe.c | 185 ++++++++++++++++++++++- sound/soc/qcom/qdsp6/q6afe.h | 46 +++++- sound/soc/qcom/qdsp6/q6dsp-lpass-ports.c | 23 +++ sound/soc/qcom/qdsp6/q6dsp-lpass-ports.h | 1 + sound/soc/qcom/qdsp6/q6routing.c | 9 ++ 6 files changed, 312 insertions(+), 2 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6afe-dai.c b/sound/soc/qcom/qdsp6/q6afe-dai.c index 8bb7452b8f18..bda79d77c8d8 100644 --- a/sound/soc/qcom/qdsp6/q6afe-dai.c +++ b/sound/soc/qcom/qdsp6/q6afe-dai.c @@ -111,6 +111,40 @@ static int q6hdmi_hw_params(struct snd_pcm_substream *substream, return 0; }

+static int q6usb_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct q6afe_dai_data *dai_data = dev_get_drvdata(dai->dev); + int channels = params_channels(params); + int rate = params_rate(params); + struct q6afe_usb_cfg *usb = &dai_data->port_config[dai->id].usb_audio; + + usb->sample_rate = rate; + usb->num_channels = channels; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_U16_LE: + case SNDRV_PCM_FORMAT_S16_LE: + case SNDRV_PCM_FORMAT_SPECIAL: + usb->bit_width = 16; + break; + case SNDRV_PCM_FORMAT_S24_LE: + case SNDRV_PCM_FORMAT_S24_3LE: + usb->bit_width = 24; + break; + case SNDRV_PCM_FORMAT_S32_LE: + usb->bit_width = 32; + break; + default: + dev_err(dai->dev, "%s: invalid format %d\n", + __func__, params_format(params)); + return -EINVAL; + } + + return 0; +} + static int q6i2s_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) @@ -411,6 +445,10 @@ static int q6afe_dai_prepare(struct snd_pcm_substream *substream, q6afe_cdc_dma_port_prepare(dai_data->port[dai->id], &dai_data->port_config[dai->id].dma_cfg); break; + case USB_RX: + q6afe_usb_port_prepare(dai_data->port[dai->id], + &dai_data->port_config[dai->id].usb_audio); + break; default: return -EINVAL; } @@ -637,6 +675,15 @@ static const struct snd_soc_dapm_route q6afe_dapm_routes[] = { {"TX_CODEC_DMA_TX_5", NULL, "TX_CODEC_DMA_TX_5 Capture"}, {"RX_CODEC_DMA_RX_6 Playback", NULL, "RX_CODEC_DMA_RX_6"}, {"RX_CODEC_DMA_RX_7 Playback", NULL, "RX_CODEC_DMA_RX_7"}, + + /* USB playback AFE port receives data for playback, hence use the RX port */ + {"USB Playback", NULL, "USB_RX"}, +}; + +static const struct snd_soc_dai_ops q6usb_ops = { + .prepare = q6afe_dai_prepare, + .hw_params = q6usb_hw_params, + .shutdown = q6afe_dai_shutdown, };

static const struct snd_soc_dai_ops q6hdmi_ops = { @@ -952,6 +999,8 @@ static const struct snd_soc_dapm_widget q6afe_dai_widgets[] = { 0, SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_AIF_IN("RX_CODEC_DMA_RX_7", "NULL", 0, SND_SOC_NOPM, 0, 0), + + SND_SOC_DAPM_AIF_IN("USB_RX", NULL, 0, SND_SOC_NOPM, 0, 0), };

static const struct snd_soc_component_driver q6afe_dai_component = { @@ -1068,6 +1117,7 @@ static int q6afe_dai_dev_probe(struct platform_device *pdev) cfg.q6i2s_ops = &q6i2s_ops; cfg.q6tdm_ops = &q6tdm_ops; cfg.q6dma_ops = &q6dma_ops; + cfg.q6usb_ops = &q6usb_ops; dais = q6dsp_audio_ports_set_config(dev, &cfg, &num_dais);

return devm_snd_soc_register_component(dev, &q6afe_dai_component, dais, num_dais); diff --git a/sound/soc/qcom/qdsp6/q6afe.c b/sound/soc/qcom/qdsp6/q6afe.c index 919e326b9462..43baf93f9c89 100644 --- a/sound/soc/qcom/qdsp6/q6afe.c +++ b/sound/soc/qcom/qdsp6/q6afe.c @@ -34,6 +34,8 @@ #define AFE_MODULE_TDM 0x0001028A

#define AFE_PARAM_ID_CDC_SLIMBUS_SLAVE_CFG 0x00010235 +#define AFE_PARAM_ID_USB_AUDIO_DEV_PARAMS 0x000102A5 +#define AFE_PARAM_ID_USB_AUDIO_DEV_LPCM_FMT 0x000102AA

#define AFE_PARAM_ID_LPAIF_CLK_CONFIG 0x00010238 #define AFE_PARAM_ID_INT_DIGITAL_CDC_CLK_CONFIG 0x00010239 @@ -43,6 +45,7 @@ #define AFE_PARAM_ID_TDM_CONFIG 0x0001029D #define AFE_PARAM_ID_PORT_SLOT_MAPPING_CONFIG 0x00010297 #define AFE_PARAM_ID_CODEC_DMA_CONFIG 0x000102B8 +#define AFE_PARAM_ID_USB_AUDIO_CONFIG 0x000102A4 #define AFE_CMD_REMOTE_LPASS_CORE_HW_VOTE_REQUEST 0x000100f4 #define AFE_CMD_RSP_REMOTE_LPASS_CORE_HW_VOTE_REQUEST 0x000100f5 #define AFE_CMD_REMOTE_LPASS_CORE_HW_DEVOTE_REQUEST 0x000100f6 @@ -71,12 +74,16 @@ #define AFE_PORT_CONFIG_I2S_WS_SRC_INTERNAL 0x1 #define AFE_LINEAR_PCM_DATA 0x0

+#define AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG 0x1

/* Port IDs */ #define AFE_API_VERSION_HDMI_CONFIG 0x1 #define AFE_PORT_ID_MULTICHAN_HDMI_RX 0x100E #define AFE_PORT_ID_HDMI_OVER_DP_RX 0x6020

+/* USB AFE port */ +#define AFE_PORT_ID_USB_RX 0x7000 + #define AFE_API_VERSION_SLIMBUS_CONFIG 0x1 /* Clock set API version */ #define AFE_API_VERSION_CLOCK_SET 1 @@ -512,12 +519,109 @@ struct afe_param_id_cdc_dma_cfg { u16 active_channels_mask; } __packed;

+struct afe_param_id_usb_cfg { +/* Minor version used for tracking USB audio device configuration. + * Supported values: AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG + */ + u32 cfg_minor_version; +/* Sampling rate of the port. + * Supported values: + * - AFE_PORT_SAMPLE_RATE_8K + * - AFE_PORT_SAMPLE_RATE_11025 + * - AFE_PORT_SAMPLE_RATE_12K + * - AFE_PORT_SAMPLE_RATE_16K + * - AFE_PORT_SAMPLE_RATE_22050 + * - AFE_PORT_SAMPLE_RATE_24K + * - AFE_PORT_SAMPLE_RATE_32K + * - AFE_PORT_SAMPLE_RATE_44P1K + * - AFE_PORT_SAMPLE_RATE_48K + * - AFE_PORT_SAMPLE_RATE_96K + * - AFE_PORT_SAMPLE_RATE_192K + */ + u32 sample_rate; +/* Bit width of the sample. + * Supported values: 16, 24 + */ + u16 bit_width; +/* Number of channels. + * Supported values: 1 and 2 + */ + u16 num_channels; +/* Data format supported by the USB. The supported value is + * 0 (#AFE_USB_AUDIO_DATA_FORMAT_LINEAR_PCM). + */ + u16 data_format; +/* this field must be 0 */ + u16 reserved; +/* device token of actual end USB aduio device */ + u32 dev_token; +/* endianness of this interface */ + u32 endian; +/* service interval */ + u32 service_interval; +} __packed; + +/** + * struct afe_param_id_usb_audio_dev_params + * @cfg_minor_version: Minor version used for tracking USB audio device + * configuration. + * Supported values: + * AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG + * @dev_token: device token of actual end USB aduio device + **/ +struct afe_param_id_usb_audio_dev_params { + u32 cfg_minor_version; + u32 dev_token; +} __packed; + +/** + * struct afe_param_id_usb_audio_dev_lpcm_fmt + * @cfg_minor_version: Minor version used for tracking USB audio device + * configuration. + * Supported values: + * AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG + * @endian: endianness of this interface + **/ +struct afe_param_id_usb_audio_dev_lpcm_fmt { + u32 cfg_minor_version; + u32 endian; +} __packed; + +/** + * struct afe_param_id_usb_audio_dev_latency_mode + * @cfg_minor_version: Minor version used for tracking USB audio device + * configuration. + * Supported values: + * AFE_API_MINOR_VERSION_USB_AUDIO_LATENCY_MODE + * @mode: latency mode for the USB audio device + **/ +struct afe_param_id_usb_audio_dev_latency_mode { + u32 minor_version; + u32 mode; +} __packed; + +#define AFE_PARAM_ID_USB_AUDIO_SVC_INTERVAL 0x000102B7 + +/** + * struct afe_param_id_usb_audio_svc_interval + * @cfg_minor_version: Minor version used for tracking USB audio device + * configuration. + * Supported values: + * AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG + * @svc_interval: service interval + **/ +struct afe_param_id_usb_audio_svc_interval { + u32 cfg_minor_version; + u32 svc_interval; +} __packed; + union afe_port_config { struct afe_param_id_hdmi_multi_chan_audio_cfg hdmi_multi_ch; struct afe_param_id_slimbus_cfg slim_cfg; struct afe_param_id_i2s_cfg i2s_cfg; struct afe_param_id_tdm_cfg tdm_cfg; struct afe_param_id_cdc_dma_cfg dma_cfg; + struct afe_param_id_usb_cfg usb_cfg; } __packed;

@@ -832,6 +936,7 @@ static struct afe_port_map port_maps[AFE_PORT_MAX] = { RX_CODEC_DMA_RX_6, 1, 1}, [RX_CODEC_DMA_RX_7] = { AFE_PORT_ID_RX_CODEC_DMA_RX_7, RX_CODEC_DMA_RX_7, 1, 1}, + [USB_RX] = { AFE_PORT_ID_USB_RX, USB_RX, 1, 1}, };

static void q6afe_port_free(struct kref *ref) @@ -1289,6 +1394,81 @@ void q6afe_tdm_port_prepare(struct q6afe_port *port, } EXPORT_SYMBOL_GPL(q6afe_tdm_port_prepare);

+static int afe_port_send_usb_dev_param(struct q6afe_port *port, struct q6afe_usb_cfg *cfg) +{ + union afe_port_config *pcfg = &port->port_cfg; + struct afe_param_id_usb_audio_dev_params usb_dev; + struct afe_param_id_usb_audio_dev_lpcm_fmt lpcm_fmt; + struct afe_param_id_usb_audio_svc_interval svc_int; + int ret = 0; + + if (!pcfg) { + dev_err(port->afe->dev, "%s: Error, no configuration data\n", __func__); + ret = -EINVAL; + goto exit; + } + + memset(&usb_dev, 0, sizeof(usb_dev)); + memset(&lpcm_fmt, 0, sizeof(lpcm_fmt)); + memset(&svc_int, 0, sizeof(svc_int)); + + usb_dev.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG; + q6afe_port_set_param_v2(port, &usb_dev, + AFE_PARAM_ID_USB_AUDIO_DEV_PARAMS, + AFE_MODULE_AUDIO_DEV_INTERFACE, sizeof(usb_dev)); + if (ret) { + dev_err(port->afe->dev, "%s: AFE device param cmd failed %d\n", + __func__, ret); + goto exit; + } + + lpcm_fmt.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG; + lpcm_fmt.endian = pcfg->usb_cfg.endian; + ret = q6afe_port_set_param_v2(port, &lpcm_fmt, + AFE_PARAM_ID_USB_AUDIO_DEV_LPCM_FMT, + AFE_MODULE_AUDIO_DEV_INTERFACE, sizeof(lpcm_fmt)); + if (ret) { + dev_err(port->afe->dev, "%s: AFE device param cmd LPCM_FMT failed %d\n", + __func__, ret); + goto exit; + } + + svc_int.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG; + svc_int.svc_interval = pcfg->usb_cfg.service_interval; + ret = q6afe_port_set_param_v2(port, &svc_int, + AFE_PARAM_ID_USB_AUDIO_SVC_INTERVAL, + AFE_MODULE_AUDIO_DEV_INTERFACE, sizeof(svc_int)); + if (ret) { + dev_err(port->afe->dev, "%s: AFE device param cmd svc_interval failed %d\n", + __func__, ret); + ret = -EINVAL; + goto exit; + } +exit: + return ret; +} + +/** + * q6afe_usb_port_prepare() - Prepare usb afe port. + * + * @port: Instance of afe port + * @cfg: USB configuration for the afe port + * + */ +void q6afe_usb_port_prepare(struct q6afe_port *port, + struct q6afe_usb_cfg *cfg) +{ + union afe_port_config *pcfg = &port->port_cfg; + + pcfg->usb_cfg.cfg_minor_version = AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG; + pcfg->usb_cfg.sample_rate = cfg->sample_rate; + pcfg->usb_cfg.num_channels = cfg->num_channels; + pcfg->usb_cfg.bit_width = cfg->bit_width; + + afe_port_send_usb_dev_param(port, cfg); +} +EXPORT_SYMBOL_GPL(q6afe_usb_port_prepare); + /** * q6afe_hdmi_port_prepare() - Prepare hdmi afe port. * @@ -1611,7 +1791,10 @@ struct q6afe_port *q6afe_port_get_from_id(struct device *dev, int id) break; case AFE_PORT_ID_WSA_CODEC_DMA_RX_0 ... AFE_PORT_ID_RX_CODEC_DMA_RX_7: cfg_type = AFE_PARAM_ID_CODEC_DMA_CONFIG; - break; + break; + case AFE_PORT_ID_USB_RX: + cfg_type = AFE_PARAM_ID_USB_AUDIO_CONFIG; + break; default: dev_err(dev, "Invalid port id 0x%x\n", port_id); return ERR_PTR(-EINVAL); diff --git a/sound/soc/qcom/qdsp6/q6afe.h b/sound/soc/qcom/qdsp6/q6afe.h index 30fd77e2f458..e098a3e15135 100644 --- a/sound/soc/qcom/qdsp6/q6afe.h +++ b/sound/soc/qcom/qdsp6/q6afe.h @@ -5,7 +5,7 @@

#include <dt-bindings/sound/qcom,q6afe.h>

-#define AFE_PORT_MAX 129 +#define AFE_PORT_MAX 130

#define MSM_AFE_PORT_TYPE_RX 0 #define MSM_AFE_PORT_TYPE_TX 1 @@ -205,6 +205,47 @@ struct q6afe_cdc_dma_cfg { u16 active_channels_mask; };

+/** + * struct q6afe_usb_cfg + * @cfg_minor_version: Minor version used for tracking USB audio device + * configuration. + * Supported values: + * AFE_API_MINOR_VERSION_USB_AUDIO_CONFIG + * @sample_rate: Sampling rate of the port + * Supported values: + * AFE_PORT_SAMPLE_RATE_8K + * AFE_PORT_SAMPLE_RATE_11025 + * AFE_PORT_SAMPLE_RATE_12K + * AFE_PORT_SAMPLE_RATE_16K + * AFE_PORT_SAMPLE_RATE_22050 + * AFE_PORT_SAMPLE_RATE_24K + * AFE_PORT_SAMPLE_RATE_32K + * AFE_PORT_SAMPLE_RATE_44P1K + * AFE_PORT_SAMPLE_RATE_48K + * AFE_PORT_SAMPLE_RATE_96K + * AFE_PORT_SAMPLE_RATE_192K + * @bit_width: Bit width of the sample. + * Supported values: 16, 24 + * @num_channels: Number of channels + * Supported values: 1, 2 + * @data_format: Data format supported by the USB + * Supported values: 0 + * @reserved: this field must be 0 + * @dev_token: device token of actual end USB audio device + * @endian: endianness of this interface + * @service_interval: service interval + **/ +struct q6afe_usb_cfg { + u32 cfg_minor_version; + u32 sample_rate; + u16 bit_width; + u16 num_channels; + u16 data_format; + u16 reserved; + u32 dev_token; + u32 endian; + u32 service_interval; +};

struct q6afe_port_config { struct q6afe_hdmi_cfg hdmi; @@ -212,6 +253,7 @@ struct q6afe_port_config { struct q6afe_i2s_cfg i2s_cfg; struct q6afe_tdm_cfg tdm; struct q6afe_cdc_dma_cfg dma_cfg; + struct q6afe_usb_cfg usb_audio; };

struct q6afe_port; @@ -221,6 +263,8 @@ int q6afe_port_start(struct q6afe_port *port); int q6afe_port_stop(struct q6afe_port *port); void q6afe_port_put(struct q6afe_port *port); int q6afe_get_port_id(int index); +void q6afe_usb_port_prepare(struct q6afe_port *port, + struct q6afe_usb_cfg *cfg); void q6afe_hdmi_port_prepare(struct q6afe_port *port, struct q6afe_hdmi_cfg *cfg); void q6afe_slim_port_prepare(struct q6afe_port *port, diff --git a/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.c b/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.c index f67c16fd90b9..39719c3f1767 100644 --- a/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.c +++ b/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.c @@ -81,6 +81,26 @@

static struct snd_soc_dai_driver q6dsp_audio_fe_dais[] = { + { + .playback = { + .stream_name = "USB Playback", + .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 | + SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | + SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | + SNDRV_PCM_RATE_192000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE | + SNDRV_PCM_FMTBIT_U16_LE | SNDRV_PCM_FMTBIT_U16_BE | + SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S24_BE | + SNDRV_PCM_FMTBIT_U24_LE | SNDRV_PCM_FMTBIT_U24_BE, + .channels_min = 1, + .channels_max = 2, + .rate_min = 8000, + .rate_max = 192000, + }, + .id = USB_RX, + .name = "USB_RX", + }, { .playback = { .stream_name = "HDMI Playback", @@ -616,6 +636,9 @@ struct snd_soc_dai_driver *q6dsp_audio_ports_set_config(struct device *dev, case WSA_CODEC_DMA_RX_0 ... RX_CODEC_DMA_RX_7: q6dsp_audio_fe_dais[i].ops = cfg->q6dma_ops; break; + case USB_RX: + q6dsp_audio_fe_dais[i].ops = cfg->q6usb_ops; + break; default: break; } diff --git a/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.h b/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.h index 7f052c8a1257..d8dde6dd0aca 100644 --- a/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.h +++ b/sound/soc/qcom/qdsp6/q6dsp-lpass-ports.h @@ -11,6 +11,7 @@ struct q6dsp_audio_port_dai_driver_config { const struct snd_soc_dai_ops *q6i2s_ops; const struct snd_soc_dai_ops *q6tdm_ops; const struct snd_soc_dai_ops *q6dma_ops; + const struct snd_soc_dai_ops *q6usb_ops; };

struct snd_soc_dai_driver *q6dsp_audio_ports_set_config(struct device *dev, diff --git a/sound/soc/qcom/qdsp6/q6routing.c b/sound/soc/qcom/qdsp6/q6routing.c index 928fd23e2c27..dc2357b4b2c7 100644 --- a/sound/soc/qcom/qdsp6/q6routing.c +++ b/sound/soc/qcom/qdsp6/q6routing.c @@ -514,6 +514,9 @@ static int msm_routing_put_audio_mixer(struct snd_kcontrol *kcontrol, return 1; }

+static const struct snd_kcontrol_new usb_mixer_controls[] = { + Q6ROUTING_RX_MIXERS(USB_RX) }; + static const struct snd_kcontrol_new hdmi_mixer_controls[] = { Q6ROUTING_RX_MIXERS(HDMI_RX) };

@@ -949,6 +952,10 @@ static const struct snd_soc_dapm_widget msm_qdsp6_widgets[] = { SND_SOC_DAPM_MIXER("MultiMedia8 Mixer", SND_SOC_NOPM, 0, 0, mmul8_mixer_controls, ARRAY_SIZE(mmul8_mixer_controls)),

+ SND_SOC_DAPM_MIXER("USB Mixer", SND_SOC_NOPM, 0, 0, + usb_mixer_controls, + ARRAY_SIZE(usb_mixer_controls)), + };

static const struct snd_soc_dapm_route intercon[] = { @@ -1042,6 +1049,8 @@ static const struct snd_soc_dapm_route intercon[] = { {"MM_UL6", NULL, "MultiMedia6 Mixer"}, {"MM_UL7", NULL, "MultiMedia7 Mixer"}, {"MM_UL8", NULL, "MultiMedia8 Mixer"}, + + Q6ROUTING_RX_DAPM_ROUTE("USB Mixer", "USB_RX"), };

static int routing_hw_params(struct snd_soc_component *component,

For USB offloading situations, the AFE port start command will result in a QMI handshake between the Q6DSP and the main processor. Depending on if the USB bus is suspended, this routine would require more time to complete, as resuming the USB bus has some overhead associated with it. Increase the timeout to 3s to allow for sufficient time for the USB QMI stream enable handshake to complete.

Reviewed-by: Srinivas Kandagatla srinivas.kandagatla@linaro.org Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/soc/qcom/qdsp6/q6afe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/qcom/qdsp6/q6afe.c b/sound/soc/qcom/qdsp6/q6afe.c index 43baf93f9c89..e9d5fa6b6b0d 100644 --- a/sound/soc/qcom/qdsp6/q6afe.c +++ b/sound/soc/qcom/qdsp6/q6afe.c @@ -365,7 +365,7 @@ #define AFE_API_VERSION_SLOT_MAPPING_CONFIG 1 #define AFE_API_VERSION_CODEC_DMA_CONFIG 1

-#define TIMEOUT_MS 1000 +#define TIMEOUT_MS 3000 #define AFE_CMD_RESP_AVAIL 0 #define AFE_CMD_RESP_NONE 1 #define AFE_CLK_TOKEN 1024

Some platforms may want to limit the number of XHCI interrupters allocated. This is passed to xhci-plat as a device property. Ensure that this is read and the max_interrupters field is set.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- drivers/usb/host/xhci-plat.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c index b9f9625467d6..e4f9035db6e1 100644 --- a/drivers/usb/host/xhci-plat.c +++ b/drivers/usb/host/xhci-plat.c @@ -257,6 +257,8 @@ int xhci_plat_probe(struct platform_device *pdev, struct device *sysdev, const s

device_property_read_u32(tmpdev, "imod-interval-ns", &xhci->imod_interval); + device_property_read_u16(tmpdev, "num-hc-interrupters", + &xhci->max_interrupters); }

hcd->usb_phy = devm_usb_get_phy_by_phandle(sysdev, "usb-phy", 0);

Several Qualcomm SoCs have a dedicated audio DSP, which has the ability to support USB sound devices. This vendor driver will implement the required handshaking with the DSP, in order to pass along required resources that will be utilized by the DSP's USB SW. The communication channel used for this handshaking will be using the QMI protocol. Required resources include: - Allocated secondary event ring address - EP transfer ring address - Interrupter number

The above information will allow for the audio DSP to execute USB transfers over the USB bus. It will also be able to support devices that have an implicit feedback and sync endpoint as well. Offloading these data transfers will allow the main/applications processor to enter lower CPU power modes, and sustain a longer duration in those modes.

Audio offloading is initiated with the following sequence: 1. Userspace configures to route audio playback to USB backend and starts playback on the platform soundcard. 2. The Q6DSP AFE will communicate to the audio DSP to start the USB AFE port. 3. This results in a QMI packet with a STREAM enable command. 4. The QC audio offload driver will fetch the required resources, and pass this information as part of the QMI response to the STREAM enable command. 5. Once the QMI response is received the audio DSP will start queuing data on the USB bus.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/usb/Kconfig | 14 + sound/usb/Makefile | 2 +- sound/usb/qcom/Makefile | 2 + sound/usb/qcom/qc_audio_offload.c | 1780 ++++++++++++++++++++++++++++ sound/usb/qcom/usb_audio_qmi_v01.c | 892 ++++++++++++++ sound/usb/qcom/usb_audio_qmi_v01.h | 162 +++ 6 files changed, 2851 insertions(+), 1 deletion(-) create mode 100644 sound/usb/qcom/Makefile create mode 100644 sound/usb/qcom/qc_audio_offload.c create mode 100644 sound/usb/qcom/usb_audio_qmi_v01.c create mode 100644 sound/usb/qcom/usb_audio_qmi_v01.h

diff --git a/sound/usb/Kconfig b/sound/usb/Kconfig index 059242f15d75..18d65a0d905a 100644 --- a/sound/usb/Kconfig +++ b/sound/usb/Kconfig @@ -165,6 +165,20 @@ config SND_BCD2000 To compile this driver as a module, choose M here: the module will be called snd-bcd2000.

+config QC_USB_AUDIO_OFFLOAD + tristate "Qualcomm Audio Offload driver" + select SND_PCM + help + Say Y here to enable the Qualcomm USB audio offloading feature + + This module sets up the required QMI stream enable/disable + responses to requests generated by the audio DSP. It passes the + USB transfer resource references, so that the audio DSP can issue + USB transfers to the host controller. + + To compile this driver as a module, choose M here: the module + will be called qc-audio-offload. + source "sound/usb/line6/Kconfig"

endif # SND_USB diff --git a/sound/usb/Makefile b/sound/usb/Makefile index 9ccb21a4ff8a..2243ae333ec9 100644 --- a/sound/usb/Makefile +++ b/sound/usb/Makefile @@ -33,5 +33,5 @@ obj-$(CONFIG_SND_USB_UA101) += snd-usbmidi-lib.o obj-$(CONFIG_SND_USB_USX2Y) += snd-usbmidi-lib.o obj-$(CONFIG_SND_USB_US122L) += snd-usbmidi-lib.o

-obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ bcd2000/ +obj-$(CONFIG_SND) += misc/ usx2y/ caiaq/ 6fire/ hiface/ bcd2000/ qcom/ obj-$(CONFIG_SND_USB_LINE6) += line6/ diff --git a/sound/usb/qcom/Makefile b/sound/usb/qcom/Makefile new file mode 100644 index 000000000000..d27d39beb8ce --- /dev/null +++ b/sound/usb/qcom/Makefile @@ -0,0 +1,2 @@ +snd-usb-audio-qmi-objs := usb_audio_qmi_v01.o qc_audio_offload.o +obj-$(CONFIG_QC_USB_AUDIO_OFFLOAD) += snd-usb-audio-qmi.o \ No newline at end of file diff --git a/sound/usb/qcom/qc_audio_offload.c b/sound/usb/qcom/qc_audio_offload.c new file mode 100644 index 000000000000..2663906644f2 --- /dev/null +++ b/sound/usb/qcom/qc_audio_offload.c @@ -0,0 +1,1780 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include <linux/ctype.h> +#include <linux/moduleparam.h> +#include <linux/module.h> +#include <linux/usb.h> +#include <linux/init.h> +#include <linux/usb/hcd.h> +#include <linux/usb/xhci-intr.h> +#include <linux/usb/quirks.h> +#include <linux/usb/audio.h> +#include <linux/usb/audio-v2.h> +#include <linux/usb/audio-v3.h> +#include <linux/soc/qcom/qmi.h> +#include <linux/iommu.h> +#include <linux/dma-mapping.h> +#include <linux/dma-map-ops.h> +#include <sound/q6usboffload.h> + +#include <sound/control.h> +#include <sound/core.h> +#include <sound/info.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/initval.h> + +#include <sound/soc.h> +#include <sound/soc-usb.h> +#include "../usbaudio.h" +#include "../card.h" +#include "../midi.h" +#include "../mixer.h" +#include "../proc.h" +#include "../quirks.h" +#include "../endpoint.h" +#include "../helper.h" +#include "../pcm.h" +#include "../format.h" +#include "../power.h" +#include "../stream.h" +#include "../media.h" +#include "usb_audio_qmi_v01.h" + +/* Stream disable request timeout during USB device disconnect */ +#define DEV_RELEASE_WAIT_TIMEOUT 10000 /* in ms */ + +/* Data interval calculation parameters */ +#define BUS_INTERVAL_FULL_SPEED 1000 /* in us */ +#define BUS_INTERVAL_HIGHSPEED_AND_ABOVE 125 /* in us */ +#define MAX_BINTERVAL_ISOC_EP 16 + +#define SND_PCM_CARD_NUM_MASK 0xffff0000 +#define SND_PCM_DEV_NUM_MASK 0xff00 +#define SND_PCM_STREAM_DIRECTION 0xff + +/* iommu resource parameters and management */ +#define PREPEND_SID_TO_IOVA(iova, sid) ((u64)(((u64)(iova)) | \ + (((u64)sid) << 32))) +#define IOVA_BASE 0x1000 +#define IOVA_XFER_RING_BASE (IOVA_BASE + PAGE_SIZE * (SNDRV_CARDS + 1)) +#define IOVA_XFER_BUF_BASE (IOVA_XFER_RING_BASE + PAGE_SIZE * SNDRV_CARDS * 32) +#define IOVA_XFER_RING_MAX (IOVA_XFER_BUF_BASE - PAGE_SIZE) +#define IOVA_XFER_BUF_MAX (0xfffff000 - PAGE_SIZE) + +#define MAX_XFER_BUFF_LEN (24 * PAGE_SIZE) + +struct iova_info { + struct list_head list; + unsigned long start_iova; + size_t size; + bool in_use; +}; + +struct intf_info { + unsigned long data_xfer_ring_va; + size_t data_xfer_ring_size; + unsigned long sync_xfer_ring_va; + size_t sync_xfer_ring_size; + unsigned long xfer_buf_va; + size_t xfer_buf_size; + phys_addr_t xfer_buf_pa; + unsigned int data_ep_pipe; + unsigned int sync_ep_pipe; + u8 *xfer_buf; + u8 intf_num; + u8 pcm_card_num; + u8 pcm_dev_num; + u8 direction; + bool in_use; +}; + +struct uaudio_qmi_dev { + struct device *dev; + u32 sid; + u32 intr_num; + struct xhci_interrupter *ir; + struct xhci_ring *sec_ring; + struct iommu_domain *domain; + + /* list to keep track of available iova */ + struct list_head xfer_ring_list; + size_t xfer_ring_iova_size; + unsigned long curr_xfer_ring_iova; + struct list_head xfer_buf_list; + size_t xfer_buf_iova_size; + unsigned long curr_xfer_buf_iova; + + /* bit fields representing pcm card enabled */ + unsigned long card_slot; + /* indicate event ring mapped or not */ + bool er_mapped; + /* reference count to number of possible consumers */ + atomic_t qdev_in_use; + /* idx to last udev card number plugged in */ + unsigned int last_card_num; +}; + +struct uaudio_dev { + struct usb_device *udev; + /* audio control interface */ + struct usb_host_interface *ctrl_intf; + unsigned int card_num; + unsigned int usb_core_id; + atomic_t in_use; + struct kref kref; + wait_queue_head_t disconnect_wq; + + /* interface specific */ + int num_intf; + struct intf_info *info; + struct snd_usb_audio *chip; +}; + +static struct uaudio_dev uadev[SNDRV_CARDS]; +static struct uaudio_qmi_dev *uaudio_qdev; +static struct uaudio_qmi_svc *uaudio_svc; +static DEFINE_MUTEX(qdev_mutex); + +struct uaudio_qmi_svc { + struct qmi_handle *uaudio_svc_hdl; + struct work_struct qmi_disconnect_work; + struct workqueue_struct *uaudio_wq; + struct sockaddr_qrtr client_sq; + bool client_connected; +}; + +enum mem_type { + MEM_EVENT_RING, + MEM_XFER_RING, + MEM_XFER_BUF, +}; + +/* Supported audio formats */ +enum usb_qmi_audio_format { + USB_QMI_PCM_FORMAT_S8 = 0, + USB_QMI_PCM_FORMAT_U8, + USB_QMI_PCM_FORMAT_S16_LE, + USB_QMI_PCM_FORMAT_S16_BE, + USB_QMI_PCM_FORMAT_U16_LE, + USB_QMI_PCM_FORMAT_U16_BE, + USB_QMI_PCM_FORMAT_S24_LE, + USB_QMI_PCM_FORMAT_S24_BE, + USB_QMI_PCM_FORMAT_U24_LE, + USB_QMI_PCM_FORMAT_U24_BE, + USB_QMI_PCM_FORMAT_S24_3LE, + USB_QMI_PCM_FORMAT_S24_3BE, + USB_QMI_PCM_FORMAT_U24_3LE, + USB_QMI_PCM_FORMAT_U24_3BE, + USB_QMI_PCM_FORMAT_S32_LE, + USB_QMI_PCM_FORMAT_S32_BE, + USB_QMI_PCM_FORMAT_U32_LE, + USB_QMI_PCM_FORMAT_U32_BE, +}; + +static enum usb_audio_device_speed_enum_v01 +get_speed_info(enum usb_device_speed udev_speed) +{ + switch (udev_speed) { + case USB_SPEED_LOW: + return USB_AUDIO_DEVICE_SPEED_LOW_V01; + case USB_SPEED_FULL: + return USB_AUDIO_DEVICE_SPEED_FULL_V01; + case USB_SPEED_HIGH: + return USB_AUDIO_DEVICE_SPEED_HIGH_V01; + case USB_SPEED_SUPER: + return USB_AUDIO_DEVICE_SPEED_SUPER_V01; + case USB_SPEED_SUPER_PLUS: + return USB_AUDIO_DEVICE_SPEED_SUPER_PLUS_V01; + default: + return USB_AUDIO_DEVICE_SPEED_INVALID_V01; + } +} + +static struct snd_usb_substream *find_substream(unsigned int card_num, + unsigned int pcm_idx, unsigned int direction) +{ + struct snd_usb_stream *as; + struct snd_usb_substream *subs = NULL; + struct snd_usb_audio *chip; + + chip = uadev[card_num].chip; + if (!chip || atomic_read(&chip->shutdown)) + goto done; + + if (pcm_idx >= chip->pcm_devs) + goto done; + + if (direction > SNDRV_PCM_STREAM_CAPTURE) + goto done; + + list_for_each_entry(as, &chip->pcm_list, list) { + if (as->pcm_index == pcm_idx) { + subs = &as->substream[direction]; + goto done; + } + } + +done: + return subs; +} + +static int info_idx_from_ifnum(int card_num, int intf_num, bool enable) +{ + int i; + + /* + * default index 0 is used when info is allocated upon + * first enable audio stream req for a pcm device + */ + if (enable && !uadev[card_num].info) + return 0; + + for (i = 0; i < uadev[card_num].num_intf; i++) { + if (enable && !uadev[card_num].info[i].in_use) + return i; + else if (!enable && + uadev[card_num].info[i].intf_num == intf_num) + return i; + } + + return -EINVAL; +} + +static int get_data_interval_from_si(struct snd_usb_substream *subs, + u32 service_interval) +{ + unsigned int bus_intval, bus_intval_mult, binterval; + + if (subs->dev->speed >= USB_SPEED_HIGH) + bus_intval = BUS_INTERVAL_HIGHSPEED_AND_ABOVE; + else + bus_intval = BUS_INTERVAL_FULL_SPEED; + + if (service_interval % bus_intval) + return -EINVAL; + + bus_intval_mult = service_interval / bus_intval; + binterval = ffs(bus_intval_mult); + if (!binterval || binterval > MAX_BINTERVAL_ISOC_EP) + return -EINVAL; + + /* check if another bit is set then bail out */ + bus_intval_mult = bus_intval_mult >> binterval; + if (bus_intval_mult) + return -EINVAL; + + return (binterval - 1); +} + +/* maps audio format received over QMI to asound.h based pcm format */ +static snd_pcm_format_t map_pcm_format(enum usb_qmi_audio_format fmt_received) +{ + switch (fmt_received) { + case USB_QMI_PCM_FORMAT_S8: + return SNDRV_PCM_FORMAT_S8; + case USB_QMI_PCM_FORMAT_U8: + return SNDRV_PCM_FORMAT_U8; + case USB_QMI_PCM_FORMAT_S16_LE: + return SNDRV_PCM_FORMAT_S16_LE; + case USB_QMI_PCM_FORMAT_S16_BE: + return SNDRV_PCM_FORMAT_S16_BE; + case USB_QMI_PCM_FORMAT_U16_LE: + return SNDRV_PCM_FORMAT_U16_LE; + case USB_QMI_PCM_FORMAT_U16_BE: + return SNDRV_PCM_FORMAT_U16_BE; + case USB_QMI_PCM_FORMAT_S24_LE: + return SNDRV_PCM_FORMAT_S24_LE; + case USB_QMI_PCM_FORMAT_S24_BE: + return SNDRV_PCM_FORMAT_S24_BE; + case USB_QMI_PCM_FORMAT_U24_LE: + return SNDRV_PCM_FORMAT_U24_LE; + case USB_QMI_PCM_FORMAT_U24_BE: + return SNDRV_PCM_FORMAT_U24_BE; + case USB_QMI_PCM_FORMAT_S24_3LE: + return SNDRV_PCM_FORMAT_S24_3LE; + case USB_QMI_PCM_FORMAT_S24_3BE: + return SNDRV_PCM_FORMAT_S24_3BE; + case USB_QMI_PCM_FORMAT_U24_3LE: + return SNDRV_PCM_FORMAT_U24_3LE; + case USB_QMI_PCM_FORMAT_U24_3BE: + return SNDRV_PCM_FORMAT_U24_3BE; + case USB_QMI_PCM_FORMAT_S32_LE: + return SNDRV_PCM_FORMAT_S32_LE; + case USB_QMI_PCM_FORMAT_S32_BE: + return SNDRV_PCM_FORMAT_S32_BE; + case USB_QMI_PCM_FORMAT_U32_LE: + return SNDRV_PCM_FORMAT_U32_LE; + case USB_QMI_PCM_FORMAT_U32_BE: + return SNDRV_PCM_FORMAT_U32_BE; + default: + /* + * We expect the caller to do input validation so we should + * never hit this. But we do have to return a proper + * snd_pcm_format_t value due to the __bitwise attribute; so + * just return the equivalent of 0 in case of bad input. + */ + return SNDRV_PCM_FORMAT_S8; + } +} + +/* Offloading IOMMU management */ +static unsigned long uaudio_get_iova(unsigned long *curr_iova, + size_t *curr_iova_size, struct list_head *head, size_t size) +{ + struct iova_info *info, *new_info = NULL; + struct list_head *curr_head; + unsigned long va = 0; + size_t tmp_size = size; + bool found = false; + + if (size % PAGE_SIZE) { + dev_err(uaudio_qdev->dev, "size %zu is not page size multiple\n", + size); + goto done; + } + + if (size > *curr_iova_size) { + dev_err(uaudio_qdev->dev, "size %zu > curr size %zu\n", + size, *curr_iova_size); + goto done; + } + if (*curr_iova_size == 0) { + dev_err(uaudio_qdev->dev, "iova mapping is full\n"); + goto done; + } + + list_for_each_entry(info, head, list) { + /* exact size iova_info */ + if (!info->in_use && info->size == size) { + info->in_use = true; + va = info->start_iova; + *curr_iova_size -= size; + found = true; + dev_dbg(uaudio_qdev->dev, "exact size: %zu found\n", size); + goto done; + } else if (!info->in_use && tmp_size >= info->size) { + if (!new_info) + new_info = info; + dev_dbg(uaudio_qdev->dev, "partial size: %zu found\n", + info->size); + tmp_size -= info->size; + if (tmp_size) + continue; + + va = new_info->start_iova; + for (curr_head = &new_info->list; curr_head != + &info->list; curr_head = curr_head->next) { + new_info = list_entry(curr_head, struct + iova_info, list); + new_info->in_use = true; + } + info->in_use = true; + *curr_iova_size -= size; + found = true; + goto done; + } else { + /* iova region in use */ + new_info = NULL; + tmp_size = size; + } + } + + info = kzalloc(sizeof(struct iova_info), GFP_KERNEL); + if (!info) { + va = 0; + goto done; + } + + va = info->start_iova = *curr_iova; + info->size = size; + info->in_use = true; + *curr_iova += size; + *curr_iova_size -= size; + found = true; + list_add_tail(&info->list, head); + +done: + if (!found) + dev_err(uaudio_qdev->dev, "unable to find %zu size iova\n", + size); + else + dev_dbg(uaudio_qdev->dev, + "va:0x%08lx curr_iova:0x%08lx curr_iova_size:%zu\n", + va, *curr_iova, *curr_iova_size); + + return va; +} + +static void uaudio_put_iova(unsigned long va, size_t size, struct list_head + *head, size_t *curr_iova_size) +{ + struct iova_info *info; + size_t tmp_size = size; + bool found = false; + + list_for_each_entry(info, head, list) { + if (info->start_iova == va) { + if (!info->in_use) { + dev_err(uaudio_qdev->dev, "va %lu is not in use\n", + va); + return; + } + found = true; + info->in_use = false; + if (info->size == size) + goto done; + } + + if (found && tmp_size >= info->size) { + info->in_use = false; + tmp_size -= info->size; + if (!tmp_size) + goto done; + } + } + + if (!found) { + dev_err(uaudio_qdev->dev, "unable to find the va %lu\n", va); + return; + } +done: + *curr_iova_size += size; + dev_dbg(uaudio_qdev->dev, "curr_iova_size %zu\n", *curr_iova_size); +} + +/** + * uaudio_iommu_unmap() - unmaps iommu memory for adsp + * @mtype: ring type + * @va: virtual address to unmap + * @iova_size: region size + * @mapped_iova_size: mapped region size + * + * Unmaps the memory region that was previously assigned to the adsp. + * + */ +static void uaudio_iommu_unmap(enum mem_type mtype, unsigned long va, + size_t iova_size, size_t mapped_iova_size) +{ + size_t umap_size; + bool unmap = true; + + if (!va || !iova_size) + return; + + switch (mtype) { + case MEM_EVENT_RING: + if (uaudio_qdev->er_mapped) + uaudio_qdev->er_mapped = false; + else + unmap = false; + break; + + case MEM_XFER_RING: + uaudio_put_iova(va, iova_size, &uaudio_qdev->xfer_ring_list, + &uaudio_qdev->xfer_ring_iova_size); + break; + case MEM_XFER_BUF: + uaudio_put_iova(va, iova_size, &uaudio_qdev->xfer_buf_list, + &uaudio_qdev->xfer_buf_iova_size); + break; + default: + dev_err(uaudio_qdev->dev, "unknown mem type %d\n", mtype); + unmap = false; + } + + if (!unmap || !mapped_iova_size) + return; + + dev_dbg(uaudio_qdev->dev, "type %d: unmap iova 0x%08lx size %zu\n", + mtype, va, mapped_iova_size); + + umap_size = iommu_unmap(uaudio_qdev->domain, va, mapped_iova_size); + if (umap_size != mapped_iova_size) + dev_err(uaudio_qdev->dev, + "unmapped size %zu for iova 0x%08lx of mapped size %zu\n", + umap_size, va, mapped_iova_size); +} + +/** + * uaudio_iommu_map() - maps iommu memory for adsp + * @mtype: ring type + * @dma_coherent: dma coherent + * @pa: physical address for ring/buffer + * @size: size of memory region + * @sgt: sg table for memory region + * + * Maps the XHCI related resources to a memory region that is assigned to be + * used by the adsp. This will be mapped to the domain, which is created by + * the ASoC USB backend driver. + * + */ +static unsigned long uaudio_iommu_map(enum mem_type mtype, bool dma_coherent, + phys_addr_t pa, size_t size, struct sg_table *sgt) +{ + unsigned long va_sg, va = 0; + bool map = true; + int i, ret; + size_t sg_len, total_len = 0; + struct scatterlist *sg; + phys_addr_t pa_sg; + int prot = IOMMU_READ | IOMMU_WRITE; + + if (dma_coherent) + prot |= IOMMU_CACHE; + + switch (mtype) { + case MEM_EVENT_RING: + va = IOVA_BASE; + /* er already mapped */ + if (uaudio_qdev->er_mapped) + map = false; + break; + case MEM_XFER_RING: + va = uaudio_get_iova(&uaudio_qdev->curr_xfer_ring_iova, + &uaudio_qdev->xfer_ring_iova_size, &uaudio_qdev->xfer_ring_list, + size); + break; + case MEM_XFER_BUF: + va = uaudio_get_iova(&uaudio_qdev->curr_xfer_buf_iova, + &uaudio_qdev->xfer_buf_iova_size, &uaudio_qdev->xfer_buf_list, + size); + break; + default: + dev_err(uaudio_qdev->dev, "unknown mem type %d\n", mtype); + } + + if (!va || !map) + goto done; + + if (!sgt) + goto skip_sgt_map; + + va_sg = va; + for_each_sg(sgt->sgl, sg, sgt->nents, i) { + sg_len = PAGE_ALIGN(sg->offset + sg->length); + pa_sg = page_to_phys(sg_page(sg)); + ret = iommu_map(uaudio_qdev->domain, va_sg, pa_sg, sg_len, + prot, GFP_KERNEL); + if (ret) { + dev_err(uaudio_qdev->dev, "mapping failed ret%d\n", ret); + dev_err(uaudio_qdev->dev, + "type:%d, pa:%pa iova:0x%08lx sg_len:%zu\n", + mtype, &pa_sg, va_sg, sg_len); + uaudio_iommu_unmap(MEM_XFER_BUF, va, size, total_len); + va = 0; + goto done; + } + dev_dbg(uaudio_qdev->dev, + "type:%d map pa:%pa to iova:0x%08lx len:%zu offset:%u\n", + mtype, &pa_sg, va_sg, sg_len, sg->offset); + va_sg += sg_len; + total_len += sg_len; + } + + if (size != total_len) { + dev_err(uaudio_qdev->dev, "iova size %zu != mapped iova size %zu\n", + size, total_len); + uaudio_iommu_unmap(MEM_XFER_BUF, va, size, total_len); + va = 0; + } + return va; + +skip_sgt_map: + dev_dbg(uaudio_qdev->dev, "type:%d map pa:%pa to iova:0x%08lx size:%zu\n", + mtype, &pa, va, size); + + ret = iommu_map(uaudio_qdev->domain, va, pa, size, prot, GFP_KERNEL); + if (ret) + dev_err(uaudio_qdev->dev, + "failed to map pa:%pa iova:0x%lx type:%d ret:%d\n", + &pa, va, mtype, ret); +done: + return va; +} + +/* looks up alias, if any, for controller DT node and returns the index */ +static int usb_get_controller_id(struct usb_device *udev) +{ + if (udev->bus->sysdev && udev->bus->sysdev->of_node) + return of_alias_get_id(udev->bus->sysdev->of_node, "usb"); + + return -ENODEV; +} + +/** + * uaudio_dev_intf_cleanup() - cleanup transfer resources + * @udev: usb device + * @info: usb offloading interface + * + * Cleans up the transfer ring related resources which are assigned per + * endpoint from XHCI. This is invoked when the USB endpoints are no + * longer in use by the adsp. + * + */ +static void uaudio_dev_intf_cleanup(struct usb_device *udev, + struct intf_info *info) +{ + uaudio_iommu_unmap(MEM_XFER_RING, info->data_xfer_ring_va, + info->data_xfer_ring_size, info->data_xfer_ring_size); + info->data_xfer_ring_va = 0; + info->data_xfer_ring_size = 0; + + uaudio_iommu_unmap(MEM_XFER_RING, info->sync_xfer_ring_va, + info->sync_xfer_ring_size, info->sync_xfer_ring_size); + info->sync_xfer_ring_va = 0; + info->sync_xfer_ring_size = 0; + + uaudio_iommu_unmap(MEM_XFER_BUF, info->xfer_buf_va, + info->xfer_buf_size, info->xfer_buf_size); + info->xfer_buf_va = 0; + + usb_free_coherent(udev, info->xfer_buf_size, + info->xfer_buf, info->xfer_buf_pa); + info->xfer_buf_size = 0; + info->xfer_buf = NULL; + info->xfer_buf_pa = 0; + + info->in_use = false; +} + +/** + * uaudio_event_ring_cleanup_free() - cleanup secondary event ring + * @dev: usb offload device + * + * Cleans up the secondary event ring that was requested. This will + * occur when the adsp is no longer transferring data on the USB bus + * across all endpoints. + * + */ +static void uaudio_event_ring_cleanup_free(struct uaudio_dev *dev) +{ + struct usb_hcd *hcd = bus_to_hcd(dev->udev->bus); + + clear_bit(dev->card_num, &uaudio_qdev->card_slot); + /* all audio devices are disconnected */ + if (!uaudio_qdev->card_slot) { + uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, + PAGE_SIZE); + xhci_remove_secondary_interrupter(hcd, uaudio_qdev->ir); + uaudio_qdev->ir = NULL; + } +} + +static void uaudio_dev_cleanup(struct uaudio_dev *dev) +{ + int if_idx; + + if (!dev->udev) + return; + + /* free xfer buffer and unmap xfer ring and buf per interface */ + for (if_idx = 0; if_idx < dev->num_intf; if_idx++) { + if (!dev->info[if_idx].in_use) + continue; + uaudio_dev_intf_cleanup(dev->udev, &dev->info[if_idx]); + dev_dbg(uaudio_qdev->dev, "release resources: intf# %d card# %d\n", + dev->info[if_idx].intf_num, dev->card_num); + } + + dev->num_intf = 0; + + /* free interface info */ + kfree(dev->info); + dev->info = NULL; + uaudio_event_ring_cleanup_free(dev); + dev->udev = NULL; +} + +/** + * disable_audio_stream() - disable usb snd endpoints + * @subs: usb substream + * + * Closes the USB SND endpoints associated with the current audio stream + * used. This will decrement the USB SND endpoint opened reference count. + * + */ +static void disable_audio_stream(struct snd_usb_substream *subs) +{ + struct snd_usb_audio *chip = subs->stream->chip; + + if (subs->data_endpoint || subs->sync_endpoint) { + close_endpoints(chip, subs); + + mutex_lock(&chip->mutex); + subs->cur_audiofmt = NULL; + mutex_unlock(&chip->mutex); + } + + snd_usb_autosuspend(chip); +} + +/* QMI service disconnect handlers */ +static void qmi_disconnect_work(struct work_struct *w) +{ + struct intf_info *info; + int idx, if_idx; + struct snd_usb_substream *subs; + struct snd_usb_audio *chip; + + /* find all active intf for set alt 0 and cleanup usb audio dev */ + for (idx = 0; idx < SNDRV_CARDS; idx++) { + if (!atomic_read(&uadev[idx].in_use)) + continue; + + chip = uadev[idx].chip; + for (if_idx = 0; if_idx < uadev[idx].num_intf; if_idx++) { + if (!uadev[idx].info || !uadev[idx].info[if_idx].in_use) + continue; + info = &uadev[idx].info[if_idx]; + subs = find_substream(info->pcm_card_num, + info->pcm_dev_num, + info->direction); + if (!subs || !chip || atomic_read(&chip->shutdown)) { + dev_err(&subs->dev->dev, + "no sub for c#%u dev#%u dir%u\n", + info->pcm_card_num, + info->pcm_dev_num, + info->direction); + continue; + } + disable_audio_stream(subs); + } + atomic_set(&uadev[idx].in_use, 0); + mutex_lock(&chip->mutex); + uaudio_dev_cleanup(&uadev[idx]); + mutex_unlock(&chip->mutex); + } +} + +/** + * qmi_bye_cb() - qmi bye message callback + * @handle: QMI handle + * @node: id of the dying node + * + * This callback is invoked when the QMI bye control message is received + * from the QMI client. Handle the message accordingly by ensuring that + * the USB offload path is disabled and cleaned up. At this point, ADSP + * is not utilizing the USB bus. + * + */ +static void qmi_bye_cb(struct qmi_handle *handle, unsigned int node) +{ + struct uaudio_qmi_svc *svc = uaudio_svc; + + if (svc->uaudio_svc_hdl != handle) + return; + + if (svc->client_connected && svc->client_sq.sq_node == node) { + queue_work(svc->uaudio_wq, &svc->qmi_disconnect_work); + svc->client_sq.sq_node = 0; + svc->client_sq.sq_port = 0; + svc->client_sq.sq_family = 0; + svc->client_connected = false; + } +} + +/** + * qmi_svc_disconnect_cb() - qmi client disconnected + * @handle: QMI handle + * @node: id of the dying node + * @port: port of the dying client + * + * Invoked when the remote QMI client is disconnected. Handle this event + * the same way as when the QMI bye message is received. This will ensure + * the USB offloading path is disabled and cleaned up. + * + */ +static void qmi_svc_disconnect_cb(struct qmi_handle *handle, + unsigned int node, unsigned int port) +{ + struct uaudio_qmi_svc *svc; + + if (uaudio_svc == NULL) + return; + + svc = uaudio_svc; + if (svc->uaudio_svc_hdl != handle) + return; + + if (svc->client_connected && svc->client_sq.sq_node == node && + svc->client_sq.sq_port == port) { + queue_work(svc->uaudio_wq, &svc->qmi_disconnect_work); + svc->client_sq.sq_node = 0; + svc->client_sq.sq_port = 0; + svc->client_sq.sq_family = 0; + svc->client_connected = false; + } +} + +/* QMI client callback handlers from QMI interface */ +static struct qmi_ops uaudio_svc_ops_options = { + .bye = qmi_bye_cb, + .del_client = qmi_svc_disconnect_cb, +}; + +/* kref release callback when all streams are disabled */ +static void uaudio_dev_release(struct kref *kref) +{ + struct uaudio_dev *dev = container_of(kref, struct uaudio_dev, kref); + + uaudio_event_ring_cleanup_free(dev); + atomic_set(&dev->in_use, 0); + wake_up(&dev->disconnect_wq); +} + +/** + * enable_audio_stream() - enable usb snd endpoints + * @subs: usb substream + * @pcm_format: pcm format requested + * @channels: number of channels + * @cur_rate: sample rate + * @datainterval: interval + * + * Opens all USB SND endpoints used for the data interface. This will increment + * the USB SND endpoint's opened count. Requests to keep the interface resumed + * until the audio stream is stopped. Will issue the USB set interface control + * message to enable the data interface. + * + */ +static int enable_audio_stream(struct snd_usb_substream *subs, + snd_pcm_format_t pcm_format, + unsigned int channels, unsigned int cur_rate, + int datainterval) +{ + struct snd_usb_audio *chip = subs->stream->chip; + struct snd_pcm_hw_params params; + const struct audioformat *fmt; + int ret; + bool fixed_rate; + + _snd_pcm_hw_params_any(&params); + _snd_pcm_hw_param_set(&params, SNDRV_PCM_HW_PARAM_FORMAT, + (__force int) pcm_format, 0); + _snd_pcm_hw_param_set(&params, SNDRV_PCM_HW_PARAM_CHANNELS, + channels, 0); + _snd_pcm_hw_param_set(&params, SNDRV_PCM_HW_PARAM_RATE, + cur_rate, 0); + + pm_runtime_barrier(&chip->intf[0]->dev); + snd_usb_autoresume(chip); + + fmt = find_format(&subs->fmt_list, pcm_format, cur_rate, + channels, datainterval, subs); + if (!fmt) { + dev_err(uaudio_qdev->dev, + "cannot find format: format = %#x, rate = %d, ch = %d\n", + pcm_format, cur_rate, channels); + return -EINVAL; + } + + if (atomic_read(&chip->shutdown)) { + dev_err(uaudio_qdev->dev, "chip already shutdown\n"); + ret = -ENODEV; + } else { + if (subs->data_endpoint) + close_endpoints(chip, subs); + + fixed_rate = snd_usb_pcm_has_fixed_rate(subs); + subs->data_endpoint = snd_usb_endpoint_open(chip, fmt, + &params, false, fixed_rate); + if (!subs->data_endpoint) { + dev_err(uaudio_qdev->dev, "failed to open data endpoint\n"); + return -EINVAL; + } + + if (fmt->sync_ep) { + subs->sync_endpoint = snd_usb_endpoint_open(chip, + fmt, &params, true, fixed_rate); + if (!subs->sync_endpoint) { + dev_err(uaudio_qdev->dev, + "failed to open sync endpoint\n"); + return -EINVAL; + } + + subs->data_endpoint->sync_source = subs->sync_endpoint; + } + + mutex_lock(&chip->mutex); + subs->cur_audiofmt = fmt; + mutex_unlock(&chip->mutex); + + if (subs->sync_endpoint) { + ret = snd_usb_endpoint_prepare(chip, subs->sync_endpoint); + if (ret < 0) + return ret; + } + + ret = snd_usb_endpoint_prepare(chip, subs->data_endpoint); + if (ret < 0) + return ret; + + dev_dbg(uaudio_qdev->dev, + "selected %s iface:%d altsetting:%d datainterval:%dus\n", + subs->direction ? "capture" : "playback", + fmt->iface, fmt->altsetting, + (1 << fmt->datainterval) * + (subs->dev->speed >= USB_SPEED_HIGH ? + BUS_INTERVAL_HIGHSPEED_AND_ABOVE : + BUS_INTERVAL_FULL_SPEED)); + } + + return 0; +} + +/* returns usb hcd sysdev */ +static struct device *usb_get_usb_backend(struct usb_device *udev) +{ + if (udev->bus->sysdev && udev->bus->sysdev->of_node) + return udev->bus->sysdev; + + return NULL; +} + +/** + * prepare_qmi_response() - prepare stream enable response + * @subs: usb substream + * @req_msg: QMI request message + * @resp: QMI response buffer + * @info_idx: usb interface array index + * + * Prepares the QMI response for a USB QMI stream enable request. Will parse + * out the parameters within the stream enable request, in order to match + * requested audio profile to the ones exposed by the USB device connected. + * + * In addition, will fetch the XHCI transfer resources needed for the handoff to + * happen. This includes, transfer ring and buffer addresses and secondary event + * ring address. These parameters will be communicated as part of the USB QMI + * stream enable response. + * + */ +static int prepare_qmi_response(struct snd_usb_substream *subs, + struct qmi_uaudio_stream_req_msg_v01 *req_msg, + struct qmi_uaudio_stream_resp_msg_v01 *resp, int info_idx) +{ + struct usb_interface *iface; + struct usb_host_interface *alts; + struct usb_interface_descriptor *altsd; + struct usb_interface_assoc_descriptor *assoc; + struct usb_host_endpoint *ep; + struct uac_format_type_i_continuous_descriptor *fmt; + struct uac_format_type_i_discrete_descriptor *fmt_v1; + struct uac_format_type_i_ext_descriptor *fmt_v2; + struct uac1_as_header_descriptor *as; + struct xhci_interrupter *ir; + struct q6usb_offload *data; + struct usb_hcd *hcd; + int ret; + int protocol, card_num, pcm_dev_num; + void *hdr_ptr; + u8 *xfer_buf; + unsigned int data_ep_pipe = 0, sync_ep_pipe = 0; + u32 len, mult, remainder, xfer_buf_len; + unsigned long va, tr_data_va = 0, tr_sync_va = 0; + phys_addr_t xhci_pa, xfer_buf_pa, tr_data_pa = 0, tr_sync_pa = 0; + dma_addr_t dma; + struct sg_table sgt; + bool dma_coherent; + + iface = usb_ifnum_to_if(subs->dev, subs->cur_audiofmt->iface); + if (!iface) { + dev_err(uaudio_qdev->dev, "interface # %d does not exist\n", + subs->cur_audiofmt->iface); + ret = -ENODEV; + goto err; + } + + assoc = iface->intf_assoc; + pcm_dev_num = (req_msg->usb_token & SND_PCM_DEV_NUM_MASK) >> 8; + xfer_buf_len = req_msg->xfer_buff_size; + card_num = uaudio_qdev->last_card_num; + + alts = &iface->altsetting[subs->cur_audiofmt->altset_idx]; + altsd = get_iface_desc(alts); + protocol = altsd->bInterfaceProtocol; + + /* get format type */ + if (protocol != UAC_VERSION_3) { + fmt = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, + UAC_FORMAT_TYPE); + if (!fmt) { + dev_err(uaudio_qdev->dev, + "%u:%d : no UAC_FORMAT_TYPE desc\n", + subs->cur_audiofmt->iface, + subs->cur_audiofmt->altset_idx); + ret = -ENODEV; + goto err; + } + } + + if (!uadev[card_num].ctrl_intf) { + dev_err(uaudio_qdev->dev, "audio ctrl intf info not cached\n"); + ret = -ENODEV; + goto err; + } + + if (protocol != UAC_VERSION_3) { + hdr_ptr = snd_usb_find_csint_desc(uadev[card_num].ctrl_intf->extra, + uadev[card_num].ctrl_intf->extralen, NULL, + UAC_HEADER); + if (!hdr_ptr) { + dev_err(uaudio_qdev->dev, "no UAC_HEADER desc\n"); + ret = -ENODEV; + goto err; + } + } + + if (protocol == UAC_VERSION_1) { + struct uac1_ac_header_descriptor *uac1_hdr = hdr_ptr; + + as = snd_usb_find_csint_desc(alts->extra, alts->extralen, NULL, + UAC_AS_GENERAL); + if (!as) { + dev_err(uaudio_qdev->dev, + "%u:%d : no UAC_AS_GENERAL desc\n", + subs->cur_audiofmt->iface, + subs->cur_audiofmt->altset_idx); + ret = -ENODEV; + goto err; + } + resp->data_path_delay = as->bDelay; + resp->data_path_delay_valid = 1; + fmt_v1 = (struct uac_format_type_i_discrete_descriptor *)fmt; + resp->usb_audio_subslot_size = fmt_v1->bSubframeSize; + resp->usb_audio_subslot_size_valid = 1; + + resp->usb_audio_spec_revision = le16_to_cpu(uac1_hdr->bcdADC); + resp->usb_audio_spec_revision_valid = 1; + } else if (protocol == UAC_VERSION_2) { + struct uac2_ac_header_descriptor *uac2_hdr = hdr_ptr; + + fmt_v2 = (struct uac_format_type_i_ext_descriptor *)fmt; + resp->usb_audio_subslot_size = fmt_v2->bSubslotSize; + resp->usb_audio_subslot_size_valid = 1; + + resp->usb_audio_spec_revision = le16_to_cpu(uac2_hdr->bcdADC); + resp->usb_audio_spec_revision_valid = 1; + } else if (protocol == UAC_VERSION_3) { + if (assoc->bFunctionSubClass == + UAC3_FUNCTION_SUBCLASS_FULL_ADC_3_0) { + dev_err(uaudio_qdev->dev, "full adc is not supported\n"); + ret = -EINVAL; + } + + switch (le16_to_cpu(get_endpoint(alts, 0)->wMaxPacketSize)) { + case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_16: + case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_16: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_16: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_16: { + resp->usb_audio_subslot_size = 0x2; + break; + } + + case UAC3_BADD_EP_MAXPSIZE_SYNC_MONO_24: + case UAC3_BADD_EP_MAXPSIZE_SYNC_STEREO_24: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_MONO_24: + case UAC3_BADD_EP_MAXPSIZE_ASYNC_STEREO_24: { + resp->usb_audio_subslot_size = 0x3; + break; + } + + default: + dev_err(uaudio_qdev->dev, + "%d: %u: Invalid wMaxPacketSize\n", + subs->cur_audiofmt->iface, + subs->cur_audiofmt->altset_idx); + ret = -EINVAL; + goto err; + } + resp->usb_audio_subslot_size_valid = 1; + } else { + dev_err(uaudio_qdev->dev, "unknown protocol version %x\n", + protocol); + ret = -ENODEV; + goto err; + } + + resp->slot_id = subs->dev->slot_id; + resp->slot_id_valid = 1; + + memcpy(&resp->std_as_opr_intf_desc, &alts->desc, sizeof(alts->desc)); + resp->std_as_opr_intf_desc_valid = 1; + + ep = usb_pipe_endpoint(subs->dev, subs->data_endpoint->pipe); + if (!ep) { + dev_err(uaudio_qdev->dev, "data ep # %d context is null\n", + subs->data_endpoint->ep_num); + ret = -ENODEV; + goto err; + } + data_ep_pipe = subs->data_endpoint->pipe; + memcpy(&resp->std_as_data_ep_desc, &ep->desc, sizeof(ep->desc)); + resp->std_as_data_ep_desc_valid = 1; + + tr_data_pa = xhci_get_xfer_resource(subs->dev, ep, &dma); + if (!tr_data_pa) { + dev_err(uaudio_qdev->dev, "failed to get data ep ring address\n"); + ret = -ENODEV; + goto err; + } + resp->xhci_mem_info.tr_data.pa = dma; + + if (subs->sync_endpoint) { + ep = usb_pipe_endpoint(subs->dev, subs->sync_endpoint->pipe); + if (!ep) { + dev_err(uaudio_qdev->dev, "implicit fb on data ep\n"); + goto skip_sync_ep; + } + sync_ep_pipe = subs->sync_endpoint->pipe; + memcpy(&resp->std_as_sync_ep_desc, &ep->desc, sizeof(ep->desc)); + resp->std_as_sync_ep_desc_valid = 1; + + tr_sync_pa = xhci_get_xfer_resource(subs->dev, ep, &dma); + if (!tr_sync_pa) { + dev_err(uaudio_qdev->dev, + "failed to get sync ep ring address\n"); + ret = -ENODEV; + goto err; + } + resp->xhci_mem_info.tr_sync.pa = dma; + } + +skip_sync_ep: + resp->interrupter_num_valid = 1; + resp->controller_num_valid = 0; + ret = usb_get_controller_id(subs->dev); + if (ret >= 0) { + resp->controller_num = ret; + resp->controller_num_valid = 1; + } + /* map xhci data structures PA memory to iova */ + dma_coherent = dev_is_dma_coherent(subs->dev->bus->sysdev); + + /* event ring */ + hcd = bus_to_hcd(subs->dev->bus); + ir = xhci_create_secondary_interrupter(hcd, uaudio_qdev->intr_num); + if (!ir) { + dev_err(uaudio_qdev->dev, "failed to fetch interrupter\n"); + ret = -ENODEV; + goto err; + } + + xhci_pa = xhci_get_ir_resource(subs->dev, ir); + if (!xhci_pa) { + dev_err(uaudio_qdev->dev, + "failed to get sec event ring address\n"); + ret = -ENODEV; + goto free_sec_ring; + } + + uaudio_qdev->ir = ir; + resp->interrupter_num = ir->intr_num; + + data = snd_soc_usb_get_priv_data(usb_get_usb_backend(subs->dev)); + if (!data) + goto free_sec_ring; + + uaudio_qdev->domain = data->domain; + uaudio_qdev->sid = data->sid; + uaudio_qdev->intr_num = data->intr_num; + uaudio_qdev->dev = data->dev; + + va = uaudio_iommu_map(MEM_EVENT_RING, dma_coherent, xhci_pa, PAGE_SIZE, + NULL); + if (!va) { + ret = -ENOMEM; + goto free_sec_ring; + } + + resp->xhci_mem_info.evt_ring.va = PREPEND_SID_TO_IOVA(va, + uaudio_qdev->sid); + resp->xhci_mem_info.evt_ring.pa = ir->event_ring->first_seg->dma; + resp->xhci_mem_info.evt_ring.size = PAGE_SIZE; + uaudio_qdev->er_mapped = true; + + resp->speed_info = get_speed_info(subs->dev->speed); + if (resp->speed_info == USB_AUDIO_DEVICE_SPEED_INVALID_V01) { + ret = -ENODEV; + goto unmap_er; + } + + resp->speed_info_valid = 1; + + /* data transfer ring */ + va = uaudio_iommu_map(MEM_XFER_RING, dma_coherent, tr_data_pa, + PAGE_SIZE, NULL); + if (!va) { + ret = -ENOMEM; + goto unmap_er; + } + + tr_data_va = va; + resp->xhci_mem_info.tr_data.va = PREPEND_SID_TO_IOVA(va, + uaudio_qdev->sid); + resp->xhci_mem_info.tr_data.size = PAGE_SIZE; + + /* sync transfer ring */ + if (!resp->xhci_mem_info.tr_sync.pa) + goto skip_sync; + + xhci_pa = resp->xhci_mem_info.tr_sync.pa; + va = uaudio_iommu_map(MEM_XFER_RING, dma_coherent, tr_sync_pa, + PAGE_SIZE, NULL); + if (!va) { + ret = -ENOMEM; + goto unmap_data; + } + + tr_sync_va = va; + resp->xhci_mem_info.tr_sync.va = PREPEND_SID_TO_IOVA(va, + uaudio_qdev->sid); + resp->xhci_mem_info.tr_sync.size = PAGE_SIZE; + +skip_sync: + /* xfer buffer, multiple of 4K only */ + if (!xfer_buf_len) + xfer_buf_len = PAGE_SIZE; + + mult = xfer_buf_len / PAGE_SIZE; + remainder = xfer_buf_len % PAGE_SIZE; + len = mult * PAGE_SIZE; + len += remainder ? PAGE_SIZE : 0; + + if (len > MAX_XFER_BUFF_LEN) { + dev_err(uaudio_qdev->dev, + "req buf len %d > max buf len %lu, setting %lu\n", + len, MAX_XFER_BUFF_LEN, MAX_XFER_BUFF_LEN); + len = MAX_XFER_BUFF_LEN; + } + + xfer_buf = usb_alloc_coherent(subs->dev, len, GFP_KERNEL, &xfer_buf_pa); + if (!xfer_buf) { + ret = -ENOMEM; + goto unmap_sync; + } + + dma_get_sgtable(subs->dev->bus->sysdev, &sgt, xfer_buf, xfer_buf_pa, + len); + va = uaudio_iommu_map(MEM_XFER_BUF, dma_coherent, xfer_buf_pa, len, + &sgt); + if (!va) { + ret = -ENOMEM; + goto unmap_sync; + } + + resp->xhci_mem_info.xfer_buff.pa = xfer_buf_pa; + resp->xhci_mem_info.xfer_buff.size = len; + + resp->xhci_mem_info.xfer_buff.va = PREPEND_SID_TO_IOVA(va, + uaudio_qdev->sid); + + resp->xhci_mem_info_valid = 1; + + sg_free_table(&sgt); + + if (!atomic_read(&uadev[card_num].in_use)) { + kref_init(&uadev[card_num].kref); + init_waitqueue_head(&uadev[card_num].disconnect_wq); + uadev[card_num].num_intf = + subs->dev->config->desc.bNumInterfaces; + uadev[card_num].info = kcalloc(uadev[card_num].num_intf, + sizeof(struct intf_info), GFP_KERNEL); + if (!uadev[card_num].info) { + ret = -ENOMEM; + goto unmap_sync; + } + uadev[card_num].udev = subs->dev; + atomic_set(&uadev[card_num].in_use, 1); + } else { + kref_get(&uadev[card_num].kref); + } + + uadev[card_num].card_num = card_num; + uadev[card_num].usb_core_id = resp->controller_num; + + /* cache intf specific info to use it for unmap and free xfer buf */ + uadev[card_num].info[info_idx].data_xfer_ring_va = tr_data_va; + uadev[card_num].info[info_idx].data_xfer_ring_size = PAGE_SIZE; + uadev[card_num].info[info_idx].sync_xfer_ring_va = tr_sync_va; + uadev[card_num].info[info_idx].sync_xfer_ring_size = PAGE_SIZE; + uadev[card_num].info[info_idx].xfer_buf_va = va; + uadev[card_num].info[info_idx].xfer_buf_pa = xfer_buf_pa; + uadev[card_num].info[info_idx].xfer_buf_size = len; + uadev[card_num].info[info_idx].data_ep_pipe = data_ep_pipe; + uadev[card_num].info[info_idx].sync_ep_pipe = sync_ep_pipe; + uadev[card_num].info[info_idx].xfer_buf = xfer_buf; + uadev[card_num].info[info_idx].pcm_card_num = card_num; + uadev[card_num].info[info_idx].pcm_dev_num = pcm_dev_num; + uadev[card_num].info[info_idx].direction = subs->direction; + uadev[card_num].info[info_idx].intf_num = subs->cur_audiofmt->iface; + uadev[card_num].info[info_idx].in_use = true; + + set_bit(card_num, &uaudio_qdev->card_slot); + + return 0; + +unmap_sync: + usb_free_coherent(subs->dev, len, xfer_buf, xfer_buf_pa); + uaudio_iommu_unmap(MEM_XFER_RING, tr_sync_va, PAGE_SIZE, PAGE_SIZE); +unmap_data: + uaudio_iommu_unmap(MEM_XFER_RING, tr_data_va, PAGE_SIZE, PAGE_SIZE); +unmap_er: + uaudio_iommu_unmap(MEM_EVENT_RING, IOVA_BASE, PAGE_SIZE, PAGE_SIZE); +free_sec_ring: + xhci_remove_secondary_interrupter(hcd, uaudio_qdev->ir); +err: + return ret; +} + +/** + * handle_uaudio_stream_req() - handle stream enable/disable request + * @handle: QMI client handle + * @sq: qrtr socket + * @txn: QMI transaction context + * @decoded_msg: decoded QMI message + * + * Main handler for the QMI stream enable/disable requests. This executes the + * corresponding enable/disable stream apis, respectively. + * + */ +static void handle_uaudio_stream_req(struct qmi_handle *handle, + struct sockaddr_qrtr *sq, + struct qmi_txn *txn, + const void *decoded_msg) +{ + struct qmi_uaudio_stream_req_msg_v01 *req_msg; + struct qmi_uaudio_stream_resp_msg_v01 resp = {{0}, 0}; + struct snd_usb_substream *subs; + struct snd_usb_audio *chip = NULL; + struct uaudio_qmi_svc *svc = uaudio_svc; + struct intf_info *info; + struct usb_host_endpoint *ep; + u8 pcm_card_num, pcm_dev_num, direction; + int info_idx = -EINVAL, datainterval = -EINVAL, ret = 0; + + if (!svc->client_connected) { + svc->client_sq = *sq; + svc->client_connected = true; + } + + mutex_lock(&qdev_mutex); + req_msg = (struct qmi_uaudio_stream_req_msg_v01 *)decoded_msg; + if (!req_msg->audio_format_valid || !req_msg->bit_rate_valid || + !req_msg->number_of_ch_valid || !req_msg->xfer_buff_size_valid) { + ret = -EINVAL; + goto response; + } + + if (!uaudio_qdev) { + ret = -EINVAL; + goto response; + } + + direction = (req_msg->usb_token & SND_PCM_STREAM_DIRECTION); + pcm_dev_num = (req_msg->usb_token & SND_PCM_DEV_NUM_MASK) >> 8; + pcm_card_num = req_msg->enable ? uaudio_qdev->last_card_num : + ffs(uaudio_qdev->card_slot) - 1; + if (pcm_card_num >= SNDRV_CARDS) { + ret = -EINVAL; + goto response; + } + + if (req_msg->audio_format > USB_QMI_PCM_FORMAT_U32_BE) { + ret = -EINVAL; + goto response; + } + + subs = find_substream(pcm_card_num, pcm_dev_num, direction); + chip = uadev[pcm_card_num].chip; + if (!subs || !chip || atomic_read(&chip->shutdown)) { + ret = -ENODEV; + goto response; + } + + info_idx = info_idx_from_ifnum(pcm_card_num, subs->cur_audiofmt ? + subs->cur_audiofmt->iface : -1, req_msg->enable); + if (atomic_read(&chip->shutdown) || !subs->stream || !subs->stream->pcm + || !subs->stream->chip) { + ret = -ENODEV; + goto response; + } + + if (req_msg->enable) { + if (info_idx < 0 || chip->system_suspend) { + ret = -EBUSY; + goto response; + } + } + + if (req_msg->service_interval_valid) { + ret = get_data_interval_from_si(subs, + req_msg->service_interval); + if (ret == -EINVAL) + goto response; + + datainterval = ret; + } + + uadev[pcm_card_num].ctrl_intf = chip->ctrl_intf; + + if (req_msg->enable) { + ret = enable_audio_stream(subs, + map_pcm_format(req_msg->audio_format), + req_msg->number_of_ch, req_msg->bit_rate, + datainterval); + + if (!ret) + ret = prepare_qmi_response(subs, req_msg, &resp, + info_idx); + } else { + info = &uadev[pcm_card_num].info[info_idx]; + if (info->data_ep_pipe) { + ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, + info->data_ep_pipe); + if (ep) + xhci_stop_endpoint(uadev[pcm_card_num].udev, + ep); + info->data_ep_pipe = 0; + } + + if (info->sync_ep_pipe) { + ep = usb_pipe_endpoint(uadev[pcm_card_num].udev, + info->sync_ep_pipe); + if (ep) + xhci_stop_endpoint(uadev[pcm_card_num].udev, + ep); + info->sync_ep_pipe = 0; + } + + disable_audio_stream(subs); + } + +response: + if (!req_msg->enable && ret != -EINVAL && ret != -ENODEV) { + mutex_lock(&chip->mutex); + if (info_idx >= 0) { + info = &uadev[pcm_card_num].info[info_idx]; + uaudio_dev_intf_cleanup( + uadev[pcm_card_num].udev, + info); + } + if (atomic_read(&uadev[pcm_card_num].in_use)) + kref_put(&uadev[pcm_card_num].kref, + uaudio_dev_release); + mutex_unlock(&chip->mutex); + } + mutex_unlock(&qdev_mutex); + + resp.usb_token = req_msg->usb_token; + resp.usb_token_valid = 1; + resp.internal_status = ret; + resp.internal_status_valid = 1; + resp.status = ret ? USB_AUDIO_STREAM_REQ_FAILURE_V01 : ret; + resp.status_valid = 1; + ret = qmi_send_response(svc->uaudio_svc_hdl, sq, txn, + QMI_UAUDIO_STREAM_RESP_V01, + QMI_UAUDIO_STREAM_RESP_MSG_V01_MAX_MSG_LEN, + qmi_uaudio_stream_resp_msg_v01_ei, &resp); +} + +static struct qmi_msg_handler uaudio_stream_req_handlers = { + .type = QMI_REQUEST, + .msg_id = QMI_UAUDIO_STREAM_REQ_V01, + .ei = qmi_uaudio_stream_req_msg_v01_ei, + .decoded_size = QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, + .fn = handle_uaudio_stream_req, +}; + +/** + * qc_usb_audio_offload_init_qmi_dev() - initializes qmi dev + * + * Initializes the USB qdev, which is used to carry information pertaining to + * the offloading resources. This device is freed only when there are no longer + * any offloading candidates. (i.e, when all audio devices are disconnected) + * + */ +static int qc_usb_audio_offload_init_qmi_dev(struct usb_device *udev) +{ + uaudio_qdev = kzalloc(sizeof(struct uaudio_qmi_dev), + GFP_KERNEL); + if (!uaudio_qdev) + return -ENOMEM; + + /* initialize xfer ring and xfer buf iova list */ + INIT_LIST_HEAD(&uaudio_qdev->xfer_ring_list); + uaudio_qdev->curr_xfer_ring_iova = IOVA_XFER_RING_BASE; + uaudio_qdev->xfer_ring_iova_size = + IOVA_XFER_RING_MAX - IOVA_XFER_RING_BASE; + + INIT_LIST_HEAD(&uaudio_qdev->xfer_buf_list); + uaudio_qdev->curr_xfer_buf_iova = IOVA_XFER_BUF_BASE; + uaudio_qdev->xfer_buf_iova_size = + IOVA_XFER_BUF_MAX - IOVA_XFER_BUF_BASE; + + return 0; +} + +/** + * qc_usb_audio_offload_probe() - platform op connect handler + * @chip: USB SND device + * + * Platform connect handler when a USB SND device is detected. Will + * notify SOC USB about the connection to enable the USB ASoC backend + * and populate internal USB chip array. + * + */ +static void qc_usb_audio_offload_probe(struct snd_usb_audio *chip) +{ + struct usb_device *udev = chip->dev; + + /* + * If there is no priv_data, the connected device is on a USB bus + * that doesn't support offloading. Avoid populating entries for + * this device. + */ + if (!snd_soc_usb_get_priv_data(usb_get_usb_backend(udev))) + return; + + mutex_lock(&chip->mutex); + mutex_lock(&qdev_mutex); + if (!uaudio_qdev) + qc_usb_audio_offload_init_qmi_dev(udev); + + atomic_inc(&uaudio_qdev->qdev_in_use); + mutex_unlock(&qdev_mutex); + + uadev[chip->card->number].chip = chip; + uaudio_qdev->last_card_num = chip->card->number; + + snd_soc_usb_connect(usb_get_usb_backend(udev), chip->index); + mutex_unlock(&chip->mutex); +} + +/** + * qc_usb_audio_cleanup_qmi_dev() - release qmi device + * + * Frees the USB qdev. Only occurs when there are no longer any potential + * devices that can utilize USB audio offloading. + * + */ +static void qc_usb_audio_cleanup_qmi_dev(void) +{ + kfree(uaudio_qdev); + uaudio_qdev = NULL; +} + +/** + * qc_usb_audio_offload_disconnect() - platform op disconnect handler + * @chip: USB SND device + * + * Platform disconnect handler. Will ensure that any pending stream is + * halted by issuing a QMI disconnect indication packet to the adsp. + * + */ +static void qc_usb_audio_offload_disconnect(struct snd_usb_audio *chip) +{ + struct usb_device *udev = chip->dev; + struct qmi_uaudio_stream_ind_msg_v01 disconnect_ind = {0}; + struct uaudio_qmi_svc *svc = uaudio_svc; + struct uaudio_dev *dev; + int card_num; + int ret; + + if (!chip) + return; + + card_num = chip->card->number; + if (card_num >= SNDRV_CARDS) + return; + + mutex_lock(&chip->mutex); + dev = &uadev[card_num]; + + /* Device has already been cleaned up, or never populated */ + if (!dev->chip) + return; + + /* clean up */ + if (!dev->udev) + goto done; + + if (atomic_read(&dev->in_use)) { + mutex_unlock(&chip->mutex); + dev_dbg(uaudio_qdev->dev, "sending qmi indication disconnect\n"); + disconnect_ind.dev_event = USB_AUDIO_DEV_DISCONNECT_V01; + disconnect_ind.slot_id = dev->udev->slot_id; + disconnect_ind.controller_num = dev->usb_core_id; + disconnect_ind.controller_num_valid = 1; + ret = qmi_send_indication(svc->uaudio_svc_hdl, &svc->client_sq, + QMI_UAUDIO_STREAM_IND_V01, + QMI_UAUDIO_STREAM_IND_MSG_V01_MAX_MSG_LEN, + qmi_uaudio_stream_ind_msg_v01_ei, + &disconnect_ind); + if (ret < 0) + dev_err(uaudio_qdev->dev, + "qmi send failed with err: %d\n", ret); + + ret = wait_event_interruptible_timeout(dev->disconnect_wq, + !atomic_read(&dev->in_use), + msecs_to_jiffies(DEV_RELEASE_WAIT_TIMEOUT)); + if (!ret) { + dev_err(uaudio_qdev->dev, + "timeout while waiting for dev_release\n"); + atomic_set(&dev->in_use, 0); + } else if (ret < 0) { + dev_err(uaudio_qdev->dev, "failed with ret %d\n", ret); + atomic_set(&dev->in_use, 0); + } + mutex_lock(&chip->mutex); + } + + uaudio_dev_cleanup(dev); +done: + uadev[card_num].chip = NULL; + mutex_unlock(&chip->mutex); + + mutex_lock(&qdev_mutex); + atomic_dec(&uaudio_qdev->qdev_in_use); + if (!atomic_read(&uaudio_qdev->qdev_in_use)) { + snd_soc_usb_disconnect(usb_get_usb_backend(udev)); + qc_usb_audio_cleanup_qmi_dev(); + } + mutex_unlock(&qdev_mutex); +} + +/** + * qc_usb_audio_offload_suspend() - USB offload PM suspend handler + * @intf: USB interface + * @message: suspend type + * + * PM suspend handler to ensure that the USB offloading driver is able to stop + * any pending traffic, so that the bus can be suspended. + * + */ +static void qc_usb_audio_offload_suspend(struct usb_interface *intf, pm_message_t message) +{ + struct snd_usb_audio *chip = usb_get_intfdata(intf); + struct qmi_uaudio_stream_ind_msg_v01 disconnect_ind = {0}; + struct uaudio_qmi_svc *svc = uaudio_svc; + struct uaudio_dev *dev; + int card_num; + int ret; + + if (!chip) + return; + + card_num = chip->card->number; + if (card_num >= SNDRV_CARDS) + return; + + + mutex_lock(&chip->mutex); + dev = &uadev[card_num]; + + if (atomic_read(&dev->in_use)) { + mutex_unlock(&chip->mutex); + dev_dbg(uaudio_qdev->dev, "sending qmi indication suspend\n"); + disconnect_ind.dev_event = USB_AUDIO_DEV_DISCONNECT_V01; + disconnect_ind.slot_id = dev->udev->slot_id; + disconnect_ind.controller_num = dev->usb_core_id; + disconnect_ind.controller_num_valid = 1; + ret = qmi_send_indication(svc->uaudio_svc_hdl, &svc->client_sq, + QMI_UAUDIO_STREAM_IND_V01, + QMI_UAUDIO_STREAM_IND_MSG_V01_MAX_MSG_LEN, + qmi_uaudio_stream_ind_msg_v01_ei, + &disconnect_ind); + if (ret < 0) + dev_err(uaudio_qdev->dev, + "qmi send failed with err: %d\n", ret); + + ret = wait_event_interruptible_timeout(dev->disconnect_wq, + !atomic_read(&dev->in_use), + msecs_to_jiffies(DEV_RELEASE_WAIT_TIMEOUT)); + if (!ret) { + dev_err(uaudio_qdev->dev, + "timeout while waiting for dev_release\n"); + atomic_set(&dev->in_use, 0); + } else if (ret < 0) { + dev_err(uaudio_qdev->dev, "failed with ret %d\n", ret); + atomic_set(&dev->in_use, 0); + } + mutex_lock(&chip->mutex); + } + mutex_unlock(&chip->mutex); +} + +static struct snd_usb_platform_ops offload_ops = { + .connect_cb = qc_usb_audio_offload_probe, + .disconnect_cb = qc_usb_audio_offload_disconnect, + .suspend_cb = qc_usb_audio_offload_suspend, +}; + +static int __init qc_usb_audio_offload_init(void) +{ + struct uaudio_qmi_svc *svc; + int ret; + + ret = snd_usb_register_platform_ops(&offload_ops); + if (ret < 0) + return ret; + + svc = kzalloc(sizeof(struct uaudio_qmi_svc), GFP_KERNEL); + if (!svc) { + ret = -ENOMEM; + goto unreg_ops; + } + + svc->uaudio_wq = create_singlethread_workqueue("uaudio_svc"); + if (!svc->uaudio_wq) { + ret = -ENOMEM; + goto free_svc; + } + + svc->uaudio_svc_hdl = kzalloc(sizeof(struct qmi_handle), GFP_KERNEL); + if (!svc->uaudio_svc_hdl) { + ret = -ENOMEM; + goto free_wq; + } + + ret = qmi_handle_init(svc->uaudio_svc_hdl, + QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN, + &uaudio_svc_ops_options, + &uaudio_stream_req_handlers); + ret = qmi_add_server(svc->uaudio_svc_hdl, UAUDIO_STREAM_SERVICE_ID_V01, + UAUDIO_STREAM_SERVICE_VERS_V01, 0); + + INIT_WORK(&svc->qmi_disconnect_work, qmi_disconnect_work); + uaudio_svc = svc; + + return 0; + +free_wq: + destroy_workqueue(svc->uaudio_wq); +free_svc: + kfree(svc); +unreg_ops: + snd_usb_unregister_platform_ops(); + + return ret; +} + +static void __exit qc_usb_audio_offload_exit(void) +{ + struct uaudio_qmi_svc *svc = uaudio_svc; + + qmi_handle_release(svc->uaudio_svc_hdl); + flush_workqueue(svc->uaudio_wq); + destroy_workqueue(svc->uaudio_wq); + kfree(svc); + uaudio_svc = NULL; + snd_usb_unregister_platform_ops(); +} + +module_init(qc_usb_audio_offload_init); +module_exit(qc_usb_audio_offload_exit); + +MODULE_DESCRIPTION("QC USB Audio Offloading"); +MODULE_LICENSE("GPL"); diff --git a/sound/usb/qcom/usb_audio_qmi_v01.c b/sound/usb/qcom/usb_audio_qmi_v01.c new file mode 100644 index 000000000000..1a0f2f579786 --- /dev/null +++ b/sound/usb/qcom/usb_audio_qmi_v01.c @@ -0,0 +1,892 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include <linux/soc/qcom/qmi.h> + +#include "usb_audio_qmi_v01.h" + +static struct qmi_elem_info mem_info_v01_ei[] = { + { + .data_type = QMI_UNSIGNED_8_BYTE, + .elem_len = 1, + .elem_size = sizeof(u64), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct mem_info_v01, va), + }, + { + .data_type = QMI_UNSIGNED_8_BYTE, + .elem_len = 1, + .elem_size = sizeof(u64), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct mem_info_v01, pa), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct mem_info_v01, size), + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; + +static struct qmi_elem_info apps_mem_info_v01_ei[] = { + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct apps_mem_info_v01, evt_ring), + .ei_array = mem_info_v01_ei, + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct apps_mem_info_v01, tr_data), + .ei_array = mem_info_v01_ei, + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct apps_mem_info_v01, tr_sync), + .ei_array = mem_info_v01_ei, + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct apps_mem_info_v01, xfer_buff), + .ei_array = mem_info_v01_ei, + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct apps_mem_info_v01, dcba), + .ei_array = mem_info_v01_ei, + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; + +static struct qmi_elem_info usb_endpoint_descriptor_v01_ei[] = { + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bLength), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bDescriptorType), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bEndpointAddress), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bmAttributes), + }, + { + .data_type = QMI_UNSIGNED_2_BYTE, + .elem_len = 1, + .elem_size = sizeof(u16), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + wMaxPacketSize), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bInterval), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bRefresh), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_endpoint_descriptor_v01, + bSynchAddress), + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; + +static struct qmi_elem_info usb_interface_descriptor_v01_ei[] = { + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bLength), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bDescriptorType), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bInterfaceNumber), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bAlternateSetting), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bNumEndpoints), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bInterfaceClass), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bInterfaceSubClass), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + bInterfaceProtocol), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0, + .offset = offsetof(struct usb_interface_descriptor_v01, + iInterface), + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; + +struct qmi_elem_info qmi_uaudio_stream_req_msg_v01_ei[] = { + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x01, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + enable), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x02, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + usb_token), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x10, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + audio_format_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x10, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + audio_format), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x11, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + number_of_ch_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x11, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + number_of_ch), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x12, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + bit_rate_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x12, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + bit_rate), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x13, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + xfer_buff_size_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x13, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + xfer_buff_size), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x14, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + service_interval_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x14, + .offset = offsetof(struct qmi_uaudio_stream_req_msg_v01, + service_interval), + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; + +struct qmi_elem_info qmi_uaudio_stream_resp_msg_v01_ei[] = { + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct qmi_response_type_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x02, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + resp), + .ei_array = qmi_response_type_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x10, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + status_valid), + }, + { + .data_type = QMI_SIGNED_4_BYTE_ENUM, + .elem_len = 1, + .elem_size = sizeof(enum usb_audio_stream_status_enum_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x10, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + status), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x11, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + internal_status_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x11, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + internal_status), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x12, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + slot_id_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x12, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + slot_id), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x13, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + usb_token_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x13, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + usb_token), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x14, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + std_as_opr_intf_desc_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct usb_interface_descriptor_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x14, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + std_as_opr_intf_desc), + .ei_array = usb_interface_descriptor_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x15, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + std_as_data_ep_desc_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct usb_endpoint_descriptor_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x15, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + std_as_data_ep_desc), + .ei_array = usb_endpoint_descriptor_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x16, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + std_as_sync_ep_desc_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct usb_endpoint_descriptor_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x16, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + std_as_sync_ep_desc), + .ei_array = usb_endpoint_descriptor_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x17, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + usb_audio_spec_revision_valid), + }, + { + .data_type = QMI_UNSIGNED_2_BYTE, + .elem_len = 1, + .elem_size = sizeof(u16), + .array_type = NO_ARRAY, + .tlv_type = 0x17, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + usb_audio_spec_revision), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x18, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + data_path_delay_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x18, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + data_path_delay), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x19, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + usb_audio_subslot_size_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x19, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + usb_audio_subslot_size), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x1A, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + xhci_mem_info_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct apps_mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x1A, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + xhci_mem_info), + .ei_array = apps_mem_info_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x1B, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + interrupter_num_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x1B, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + interrupter_num), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x1C, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + speed_info_valid), + }, + { + .data_type = QMI_SIGNED_4_BYTE_ENUM, + .elem_len = 1, + .elem_size = sizeof(enum usb_audio_device_speed_enum_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x1C, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + speed_info), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x1D, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + controller_num_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x1D, + .offset = offsetof( + struct qmi_uaudio_stream_resp_msg_v01, + controller_num), + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; + +struct qmi_elem_info qmi_uaudio_stream_ind_msg_v01_ei[] = { + { + .data_type = QMI_SIGNED_4_BYTE_ENUM, + .elem_len = 1, + .elem_size = sizeof( + enum usb_audio_device_indication_enum_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x01, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + dev_event), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x02, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + slot_id), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x10, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + usb_token_valid), + }, + { + .data_type = QMI_UNSIGNED_4_BYTE, + .elem_len = 1, + .elem_size = sizeof(u32), + .array_type = NO_ARRAY, + .tlv_type = 0x10, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + usb_token), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x11, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + std_as_opr_intf_desc_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct usb_interface_descriptor_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x11, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + std_as_opr_intf_desc), + .ei_array = usb_interface_descriptor_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x12, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + std_as_data_ep_desc_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct usb_endpoint_descriptor_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x12, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + std_as_data_ep_desc), + .ei_array = usb_endpoint_descriptor_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x13, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + std_as_sync_ep_desc_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct usb_endpoint_descriptor_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x13, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + std_as_sync_ep_desc), + .ei_array = usb_endpoint_descriptor_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x14, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + usb_audio_spec_revision_valid), + }, + { + .data_type = QMI_UNSIGNED_2_BYTE, + .elem_len = 1, + .elem_size = sizeof(u16), + .array_type = NO_ARRAY, + .tlv_type = 0x14, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + usb_audio_spec_revision), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x15, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + data_path_delay_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x15, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + data_path_delay), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x16, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + usb_audio_subslot_size_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x16, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + usb_audio_subslot_size), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x17, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + xhci_mem_info_valid), + }, + { + .data_type = QMI_STRUCT, + .elem_len = 1, + .elem_size = sizeof(struct apps_mem_info_v01), + .array_type = NO_ARRAY, + .tlv_type = 0x17, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + xhci_mem_info), + .ei_array = apps_mem_info_v01_ei, + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x18, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + interrupter_num_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x18, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + interrupter_num), + }, + { + .data_type = QMI_OPT_FLAG, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x19, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + controller_num_valid), + }, + { + .data_type = QMI_UNSIGNED_1_BYTE, + .elem_len = 1, + .elem_size = sizeof(u8), + .array_type = NO_ARRAY, + .tlv_type = 0x19, + .offset = offsetof(struct qmi_uaudio_stream_ind_msg_v01, + controller_num), + }, + { + .data_type = QMI_EOTI, + .array_type = NO_ARRAY, + .tlv_type = QMI_COMMON_TLV_TYPE, + }, +}; diff --git a/sound/usb/qcom/usb_audio_qmi_v01.h b/sound/usb/qcom/usb_audio_qmi_v01.h new file mode 100644 index 000000000000..a30ae2618b95 --- /dev/null +++ b/sound/usb/qcom/usb_audio_qmi_v01.h @@ -0,0 +1,162 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (c) 2022-2023 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#ifndef USB_QMI_V01_H +#define USB_QMI_V01_H + +#define UAUDIO_STREAM_SERVICE_ID_V01 0x41D +#define UAUDIO_STREAM_SERVICE_VERS_V01 0x01 + +#define QMI_UAUDIO_STREAM_RESP_V01 0x0001 +#define QMI_UAUDIO_STREAM_REQ_V01 0x0001 +#define QMI_UAUDIO_STREAM_IND_V01 0x0001 + + +struct mem_info_v01 { + u64 va; + u64 pa; + u32 size; +}; + +struct apps_mem_info_v01 { + struct mem_info_v01 evt_ring; + struct mem_info_v01 tr_data; + struct mem_info_v01 tr_sync; + struct mem_info_v01 xfer_buff; + struct mem_info_v01 dcba; +}; + +struct usb_endpoint_descriptor_v01 { + u8 bLength; + u8 bDescriptorType; + u8 bEndpointAddress; + u8 bmAttributes; + u16 wMaxPacketSize; + u8 bInterval; + u8 bRefresh; + u8 bSynchAddress; +}; + +struct usb_interface_descriptor_v01 { + u8 bLength; + u8 bDescriptorType; + u8 bInterfaceNumber; + u8 bAlternateSetting; + u8 bNumEndpoints; + u8 bInterfaceClass; + u8 bInterfaceSubClass; + u8 bInterfaceProtocol; + u8 iInterface; +}; + +enum usb_audio_stream_status_enum_v01 { + USB_AUDIO_STREAM_STATUS_ENUM_MIN_VAL_V01 = INT_MIN, + USB_AUDIO_STREAM_REQ_SUCCESS_V01 = 0, + USB_AUDIO_STREAM_REQ_FAILURE_V01 = 1, + USB_AUDIO_STREAM_REQ_FAILURE_NOT_FOUND_V01 = 2, + USB_AUDIO_STREAM_REQ_FAILURE_INVALID_PARAM_V01 = 3, + USB_AUDIO_STREAM_REQ_FAILURE_MEMALLOC_V01 = 4, + USB_AUDIO_STREAM_STATUS_ENUM_MAX_VAL_V01 = INT_MAX, +}; + +enum usb_audio_device_indication_enum_v01 { + USB_AUDIO_DEVICE_INDICATION_ENUM_MIN_VAL_V01 = INT_MIN, + USB_AUDIO_DEV_CONNECT_V01 = 0, + USB_AUDIO_DEV_DISCONNECT_V01 = 1, + USB_AUDIO_DEV_SUSPEND_V01 = 2, + USB_AUDIO_DEV_RESUME_V01 = 3, + USB_AUDIO_DEVICE_INDICATION_ENUM_MAX_VAL_V01 = INT_MAX, +}; + +enum usb_audio_device_speed_enum_v01 { + USB_AUDIO_DEVICE_SPEED_ENUM_MIN_VAL_V01 = INT_MIN, + USB_AUDIO_DEVICE_SPEED_INVALID_V01 = 0, + USB_AUDIO_DEVICE_SPEED_LOW_V01 = 1, + USB_AUDIO_DEVICE_SPEED_FULL_V01 = 2, + USB_AUDIO_DEVICE_SPEED_HIGH_V01 = 3, + USB_AUDIO_DEVICE_SPEED_SUPER_V01 = 4, + USB_AUDIO_DEVICE_SPEED_SUPER_PLUS_V01 = 5, + USB_AUDIO_DEVICE_SPEED_ENUM_MAX_VAL_V01 = INT_MAX, +}; + +struct qmi_uaudio_stream_req_msg_v01 { + u8 enable; + u32 usb_token; + u8 audio_format_valid; + u32 audio_format; + u8 number_of_ch_valid; + u32 number_of_ch; + u8 bit_rate_valid; + u32 bit_rate; + u8 xfer_buff_size_valid; + u32 xfer_buff_size; + u8 service_interval_valid; + u32 service_interval; +}; +#define QMI_UAUDIO_STREAM_REQ_MSG_V01_MAX_MSG_LEN 46 +extern struct qmi_elem_info qmi_uaudio_stream_req_msg_v01_ei[]; + +struct qmi_uaudio_stream_resp_msg_v01 { + struct qmi_response_type_v01 resp; + u8 status_valid; + enum usb_audio_stream_status_enum_v01 status; + u8 internal_status_valid; + u32 internal_status; + u8 slot_id_valid; + u32 slot_id; + u8 usb_token_valid; + u32 usb_token; + u8 std_as_opr_intf_desc_valid; + struct usb_interface_descriptor_v01 std_as_opr_intf_desc; + u8 std_as_data_ep_desc_valid; + struct usb_endpoint_descriptor_v01 std_as_data_ep_desc; + u8 std_as_sync_ep_desc_valid; + struct usb_endpoint_descriptor_v01 std_as_sync_ep_desc; + u8 usb_audio_spec_revision_valid; + u16 usb_audio_spec_revision; + u8 data_path_delay_valid; + u8 data_path_delay; + u8 usb_audio_subslot_size_valid; + u8 usb_audio_subslot_size; + u8 xhci_mem_info_valid; + struct apps_mem_info_v01 xhci_mem_info; + u8 interrupter_num_valid; + u8 interrupter_num; + u8 speed_info_valid; + enum usb_audio_device_speed_enum_v01 speed_info; + u8 controller_num_valid; + u8 controller_num; +}; +#define QMI_UAUDIO_STREAM_RESP_MSG_V01_MAX_MSG_LEN 202 +extern struct qmi_elem_info qmi_uaudio_stream_resp_msg_v01_ei[]; + +struct qmi_uaudio_stream_ind_msg_v01 { + enum usb_audio_device_indication_enum_v01 dev_event; + u32 slot_id; + u8 usb_token_valid; + u32 usb_token; + u8 std_as_opr_intf_desc_valid; + struct usb_interface_descriptor_v01 std_as_opr_intf_desc; + u8 std_as_data_ep_desc_valid; + struct usb_endpoint_descriptor_v01 std_as_data_ep_desc; + u8 std_as_sync_ep_desc_valid; + struct usb_endpoint_descriptor_v01 std_as_sync_ep_desc; + u8 usb_audio_spec_revision_valid; + u16 usb_audio_spec_revision; + u8 data_path_delay_valid; + u8 data_path_delay; + u8 usb_audio_subslot_size_valid; + u8 usb_audio_subslot_size; + u8 xhci_mem_info_valid; + struct apps_mem_info_v01 xhci_mem_info; + u8 interrupter_num_valid; + u8 interrupter_num; + u8 controller_num_valid; + u8 controller_num; +}; +#define QMI_UAUDIO_STREAM_IND_MSG_V01_MAX_MSG_LEN 181 +extern struct qmi_elem_info qmi_uaudio_stream_ind_msg_v01_ei[]; + +#endif

Introduce a check for if a particular PCM format is supported by the USB audio device connected. If the USB audio device does not have an audio profile which can support the requested format, then notify the USB backend.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- include/sound/soc-usb.h | 3 +++ sound/soc/soc-usb.c | 13 +++++++++++++ 2 files changed, 16 insertions(+)

diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h index 378992ea07bd..71e6e75e600a 100644 --- a/include/sound/soc-usb.h +++ b/include/sound/soc-usb.h @@ -23,6 +23,9 @@ struct snd_soc_usb { void *priv_data; };

+int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params, + int direction); + int snd_soc_usb_connect(struct device *usbdev, int card_idx); int snd_soc_usb_disconnect(struct device *usbdev); void snd_soc_usb_set_priv_data(struct device *dev, void *priv); diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c index 4293451cdd49..cdce1bb42df5 100644 --- a/sound/soc/soc-usb.c +++ b/sound/soc/soc-usb.c @@ -70,6 +70,19 @@ void *snd_soc_usb_get_priv_data(struct device *dev) } EXPORT_SYMBOL_GPL(snd_soc_usb_get_priv_data);

+int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params, + int direction) +{ + struct snd_usb_stream *as; + + as = snd_usb_find_suppported_substream(card_idx, params, direction); + if (!as) + return -EOPNOTSUPP; + + return 0; +} +EXPORT_SYMBOL_GPL(snd_soc_usb_find_format); + /** * snd_soc_usb_add_port() - Add a USB backend port * @dev: USB backend device

With USB audio offloading, an audio session is started from the ASoC platform sound card and PCM devices. Likewise, the USB SND path is still readily available for use, in case the non-offload path is desired. In order to prevent the two entities from attempting to use the USB bus, introduce a flag that determines when either paths are in use.

If a PCM device is already in use, the check will return an error to userspace notifying that the stream is currently busy. This ensures that only one path is using the USB substream.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/usb/card.h | 1 + sound/usb/pcm.c | 19 +++++++++++++++++-- sound/usb/qcom/qc_audio_offload.c | 15 ++++++++++++++- 3 files changed, 32 insertions(+), 3 deletions(-)

diff --git a/sound/usb/card.h b/sound/usb/card.h index 4535b48edd1b..922868d2dccd 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -164,6 +164,7 @@ struct snd_usb_substream { unsigned int pkt_offset_adj; /* Bytes to drop from beginning of packets (for non-compliant devices) */ unsigned int stream_offset_adj; /* Bytes to drop from beginning of stream (for non-compliant devices) */

+ unsigned int opened:1; /* pcm device opened */ unsigned int running: 1; /* running status */ unsigned int period_elapsed_pending; /* delay period handling */

diff --git a/sound/usb/pcm.c b/sound/usb/pcm.c index 482c160cbc17..c8590ff78d11 100644 --- a/sound/usb/pcm.c +++ b/sound/usb/pcm.c @@ -1208,8 +1208,15 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream) struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_pcm_runtime *runtime = substream->runtime; struct snd_usb_substream *subs = &as->substream[direction]; + struct snd_usb_audio *chip = subs->stream->chip; int ret;

+ mutex_lock(&chip->mutex); + if (subs->opened) { + mutex_unlock(&chip->mutex); + return -EBUSY; + } + runtime->hw = snd_usb_hardware; /* need an explicit sync to catch applptr update in low-latency mode */ if (direction == SNDRV_PCM_STREAM_PLAYBACK && @@ -1226,13 +1233,17 @@ static int snd_usb_pcm_open(struct snd_pcm_substream *substream)

ret = setup_hw_info(runtime, subs); if (ret < 0) - return ret; + goto out; ret = snd_usb_autoresume(subs->stream->chip); if (ret < 0) - return ret; + goto out; ret = snd_media_stream_init(subs, as->pcm, direction); if (ret < 0) snd_usb_autosuspend(subs->stream->chip); + subs->opened = 1; +out: + mutex_unlock(&chip->mutex); + return ret; }

@@ -1241,6 +1252,7 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream) int direction = substream->stream; struct snd_usb_stream *as = snd_pcm_substream_chip(substream); struct snd_usb_substream *subs = &as->substream[direction]; + struct snd_usb_audio *chip = subs->stream->chip; int ret;

snd_media_stop_pipeline(subs); @@ -1254,6 +1266,9 @@ static int snd_usb_pcm_close(struct snd_pcm_substream *substream)

subs->pcm_substream = NULL; snd_usb_autosuspend(subs->stream->chip); + mutex_lock(&chip->mutex); + subs->opened = 0; + mutex_unlock(&chip->mutex);

return 0; } diff --git a/sound/usb/qcom/qc_audio_offload.c b/sound/usb/qcom/qc_audio_offload.c index 2663906644f2..2c8dd5605849 100644 --- a/sound/usb/qcom/qc_audio_offload.c +++ b/sound/usb/qcom/qc_audio_offload.c @@ -1402,12 +1402,17 @@ static void handle_uaudio_stream_req(struct qmi_handle *handle, goto response; }

+ mutex_lock(&chip->mutex); if (req_msg->enable) { - if (info_idx < 0 || chip->system_suspend) { + if (info_idx < 0 || chip->system_suspend || subs->opened) { ret = -EBUSY; + mutex_unlock(&chip->mutex); + goto response; } + subs->opened = 1; } + mutex_unlock(&chip->mutex);

if (req_msg->service_interval_valid) { ret = get_data_interval_from_si(subs, @@ -1429,6 +1434,11 @@ static void handle_uaudio_stream_req(struct qmi_handle *handle, if (!ret) ret = prepare_qmi_response(subs, req_msg, &resp, info_idx); + if (ret < 0) { + mutex_lock(&chip->mutex); + subs->opened = 0; + mutex_unlock(&chip->mutex); + } } else { info = &uadev[pcm_card_num].info[info_idx]; if (info->data_ep_pipe) { @@ -1450,6 +1460,9 @@ static void handle_uaudio_stream_req(struct qmi_handle *handle, }

disable_audio_stream(subs); + mutex_lock(&chip->mutex); + subs->opened = 0; + mutex_unlock(&chip->mutex); }

response:

Add an example on enabling of USB offload for the Q6DSP. The routing can be done by the mixer, which can pass the multimedia stream to the USB backend.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- .../devicetree/bindings/sound/qcom,sm8250.yaml | 15 +++++++++++++++ 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml index 262de7a60a73..13145e010ddf 100644 --- a/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml +++ b/Documentation/devicetree/bindings/sound/qcom,sm8250.yaml @@ -220,6 +220,21 @@ examples: sound-dai = <&vamacro 0>; }; }; + + usb-dai-link { + link-name = "USB Playback"; + cpu { + sound-dai = <&q6afedai USB_RX>; + }; + + codec { + sound-dai = <&usbdai USB_RX>; + }; + + platform { + sound-dai = <&q6routing>; + }; + }; };

- |

Currently, only the index to the USB SND card array is passed to the USB backend. Pass through more information, specifically the USB SND card number and the number of PCM devices available. The USB backend should know about which sound resources are being shared between the ASoC and USB SND paths. This can be utilized to properly select and maintain the offloading devices.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- include/sound/soc-usb.h | 9 +++++---- sound/soc/qcom/qdsp6/q6usb.c | 20 ++++++++++++++++++-- sound/soc/soc-usb.c | 12 +++++++----- sound/usb/qcom/qc_audio_offload.c | 9 +++++---- 4 files changed, 35 insertions(+), 15 deletions(-)

diff --git a/include/sound/soc-usb.h b/include/sound/soc-usb.h index 71e6e75e600a..606128332044 100644 --- a/include/sound/soc-usb.h +++ b/include/sound/soc-usb.h @@ -19,20 +19,21 @@ struct snd_soc_usb { struct device *dev; struct snd_soc_component *component; int (*connection_status_cb)(struct snd_soc_usb *usb, int card_idx, - int connected); + int chip_idx, int num_pcm, int connected); void *priv_data; };

int snd_soc_usb_find_format(int card_idx, struct snd_pcm_hw_params *params, int direction);

-int snd_soc_usb_connect(struct device *usbdev, int card_idx); -int snd_soc_usb_disconnect(struct device *usbdev); +int snd_soc_usb_connect(struct device *usbdev, int card_idx, int chip_idx, + int num_pcm); +int snd_soc_usb_disconnect(struct device *usbdev, int card_idx); void snd_soc_usb_set_priv_data(struct device *dev, void *priv); void *snd_soc_usb_get_priv_data(struct device *usbdev);

struct snd_soc_usb *snd_soc_usb_add_port(struct device *dev, void *priv, int (*connection_cb)(struct snd_soc_usb *usb, int card_idx, - int connected)); + int chip_idx, int num_pcm, int connected)); int snd_soc_usb_remove_port(struct device *dev); #endif diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c index c9d5c9eecf89..0dadc92b583f 100644 --- a/sound/soc/qcom/qdsp6/q6usb.c +++ b/sound/soc/qcom/qdsp6/q6usb.c @@ -25,10 +25,18 @@

#define SID_MASK 0xF

+struct q6usb_status { + unsigned int num_pcm; + unsigned int chip_index; + unsigned int pcm_index; +}; + struct q6usb_port_data { struct q6afe_usb_cfg usb_cfg; struct snd_soc_usb *usb; struct q6usb_offload priv; + unsigned long available_card_slot; + struct q6usb_status status[SNDRV_CARDS]; int active_idx; };

@@ -97,7 +105,7 @@ static int q6usb_audio_ports_of_xlate_dai_name(struct snd_soc_component *compone }

static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, int card_idx, - int connected) + int chip_idx, int num_pcm, int connected) { struct snd_soc_dapm_context *dapm; struct q6usb_port_data *data; @@ -109,8 +117,16 @@ static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, int card_idx, snd_soc_dapm_enable_pin(dapm, "USB_RX_BE"); /* We only track the latest USB headset plugged in */ data->active_idx = card_idx; + + set_bit(card_idx, &data->available_card_slot); + data->status[card_idx].num_pcm = num_pcm; + data->status[card_idx].chip_index = chip_idx; } else { - snd_soc_dapm_disable_pin(dapm, "USB_RX_BE"); + clear_bit(card_idx, &data->available_card_slot); + data->status[card_idx].num_pcm = 0; + data->status[card_idx].chip_index = 0; + if (!data->available_card_slot) + snd_soc_dapm_disable_pin(dapm, "USB_RX_BE"); } snd_soc_dapm_sync(dapm);

diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c index cdce1bb42df5..84dc6d0b2eab 100644 --- a/sound/soc/soc-usb.c +++ b/sound/soc/soc-usb.c @@ -95,7 +95,7 @@ EXPORT_SYMBOL_GPL(snd_soc_usb_find_format); */ struct snd_soc_usb *snd_soc_usb_add_port(struct device *dev, void *priv, int (*connection_cb)(struct snd_soc_usb *usb, int card_idx, - int connected)) + int chip_idx, int num_pcm, int connected)) { struct snd_soc_usb *usb;

@@ -149,7 +149,8 @@ EXPORT_SYMBOL_GPL(snd_soc_usb_remove_port); * handle how the USB backend selects, which device to enable offloading on. * */ -int snd_soc_usb_connect(struct device *usbdev, int card_idx) +int snd_soc_usb_connect(struct device *usbdev, int card_idx, int chip_idx, + int num_pcm) { struct snd_soc_usb *ctx;

@@ -161,7 +162,8 @@ int snd_soc_usb_connect(struct device *usbdev, int card_idx) return -ENODEV;

if (ctx->connection_status_cb) - ctx->connection_status_cb(ctx, card_idx, 1); + ctx->connection_status_cb(ctx, card_idx, chip_idx, + num_pcm, 1);

return 0; } @@ -174,7 +176,7 @@ EXPORT_SYMBOL_GPL(snd_soc_usb_connect); * Notify of a new USB SND device disconnection to the USB backend. * */ -int snd_soc_usb_disconnect(struct device *usbdev) +int snd_soc_usb_disconnect(struct device *usbdev, int card_idx) { struct snd_soc_usb *ctx;

@@ -186,7 +188,7 @@ int snd_soc_usb_disconnect(struct device *usbdev) return -ENODEV;

if (ctx->connection_status_cb) - ctx->connection_status_cb(ctx, -1, 0); + ctx->connection_status_cb(ctx, card_idx, 0, 0, 0);

return 0; } diff --git a/sound/usb/qcom/qc_audio_offload.c b/sound/usb/qcom/qc_audio_offload.c index 2c8dd5605849..7d6e7f946a47 100644 --- a/sound/usb/qcom/qc_audio_offload.c +++ b/sound/usb/qcom/qc_audio_offload.c @@ -1562,7 +1562,8 @@ static void qc_usb_audio_offload_probe(struct snd_usb_audio *chip) uadev[chip->card->number].chip = chip; uaudio_qdev->last_card_num = chip->card->number;

- snd_soc_usb_connect(usb_get_usb_backend(udev), chip->index); + snd_soc_usb_connect(usb_get_usb_backend(udev), chip->card->number, + chip->index, chip->pcm_devs); mutex_unlock(&chip->mutex); }

@@ -1649,12 +1650,12 @@ static void qc_usb_audio_offload_disconnect(struct snd_usb_audio *chip) uadev[card_num].chip = NULL; mutex_unlock(&chip->mutex);

+ snd_soc_usb_disconnect(usb_get_usb_backend(udev), card_num); + mutex_lock(&qdev_mutex); atomic_dec(&uaudio_qdev->qdev_in_use); - if (!atomic_read(&uaudio_qdev->qdev_in_use)) { - snd_soc_usb_disconnect(usb_get_usb_backend(udev)); + if (!atomic_read(&uaudio_qdev->qdev_in_use)) qc_usb_audio_cleanup_qmi_dev(); - } mutex_unlock(&qdev_mutex); }

Add a kcontrol to the platform sound card to fetch the current offload status. This can allow for userspace to ensure/check which USB SND resources are actually busy versus having to attempt opening the USB SND devices, which will result in an error if offloading is active.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/soc/qcom/qdsp6/q6usb.c | 104 ++++++++++++++++++++++++++++++++++- 1 file changed, 101 insertions(+), 3 deletions(-)

diff --git a/sound/soc/qcom/qdsp6/q6usb.c b/sound/soc/qcom/qdsp6/q6usb.c index 55f9bcd928f3..89a2351f4cfa 100644 --- a/sound/soc/qcom/qdsp6/q6usb.c +++ b/sound/soc/qcom/qdsp6/q6usb.c @@ -30,6 +30,8 @@ struct q6usb_status { unsigned int num_pcm; unsigned int chip_index; unsigned int pcm_index; + bool prepared; + bool running; };

struct q6usb_port_data { @@ -52,6 +54,17 @@ static const struct snd_soc_dapm_route q6usb_dapm_routes[] = { {"USB Playback", NULL, "USB_RX_BE"}, };

+static int q6usb_find_running(struct q6usb_port_data *data) +{ + int i; + + for (i = 0; i < SNDRV_CARDS; i++) { + if (data->status[i].running) + return i; + } + return -ENODEV; +} + static int q6usb_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) @@ -81,14 +94,40 @@ static int q6usb_hw_params(struct snd_pcm_substream *substream, goto out;

data->status[data->sel_card_idx].pcm_index = data->sel_pcm_idx; + data->status[data->sel_card_idx].prepared = true; out: mutex_unlock(&data->mutex);

return ret; }

+static int q6usb_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct q6usb_port_data *data = dev_get_drvdata(dai->dev); + + mutex_lock(&data->mutex); + data->status[data->sel_card_idx].running = true; + mutex_unlock(&data->mutex); + + return 0; +} + +static void q6usb_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct q6usb_port_data *data = dev_get_drvdata(dai->dev); + + mutex_lock(&data->mutex); + data->status[data->sel_card_idx].running = false; + data->status[data->sel_card_idx].prepared = false; + mutex_unlock(&data->mutex); +} + static const struct snd_soc_dai_ops q6usb_ops = { .hw_params = q6usb_hw_params, + .prepare = q6usb_prepare, + .shutdown = q6usb_shutdown, };

static struct snd_soc_dai_driver q6usb_be_dais[] = { @@ -148,10 +187,15 @@ static int q6usb_put_offload_dev(struct snd_kcontrol *kcontrol, int pcmidx; int cardidx;

+ mutex_lock(&data->mutex); + + /* Don't allow changes to the offloading devices if session is busy */ + if (data->sel_card_idx >= 0 && data->status[data->sel_card_idx].prepared) + goto out; + cardidx = ucontrol->value.integer.value[0]; pcmidx = ucontrol->value.integer.value[1];

- mutex_lock(&data->mutex); if ((cardidx >= 0 && test_bit(cardidx, &data->available_card_slot))) { data->sel_card_idx = cardidx; changed = 1; @@ -162,6 +206,8 @@ static int q6usb_put_offload_dev(struct snd_kcontrol *kcontrol, data->idx_valid = true; changed = 1; } + +out: mutex_unlock(&data->mutex);

return changed; @@ -187,11 +233,59 @@ static const struct snd_kcontrol_new q6usb_offload_dev_ctrl = { .put = q6usb_put_offload_dev, };

+static int q6usb_mixer_get_offload_status(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_value *ucontrol) +{ + struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); + struct q6usb_port_data *data = dev_get_drvdata(component->dev); + int running; + int card_idx; + int pcm_idx; + + running = q6usb_find_running(data); + if (running < 0) { + card_idx = -1; + pcm_idx = -1; + } else { + card_idx = running; + pcm_idx = data->status[running].pcm_index; + } + + ucontrol->value.integer.value[0] = card_idx; + ucontrol->value.integer.value[1] = pcm_idx; + return 0; +} + +static int q6usb_offload_ctl_info(struct snd_kcontrol *kcontrol, + struct snd_ctl_elem_info *uinfo) +{ + uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; + uinfo->count = 2; + uinfo->value.integer.min = 0; + uinfo->value.integer.max = SNDRV_CARDS; + + return 0; +} + +static const struct snd_kcontrol_new q6usb_offload_control = { + .iface = SNDRV_CTL_ELEM_IFACE_CARD, + .access = SNDRV_CTL_ELEM_ACCESS_READ, + .name = "Q6USB offload status", + .info = q6usb_offload_ctl_info, + .get = q6usb_mixer_get_offload_status, + .put = NULL, +}; + /* Build a mixer control for a UAC connector control (jack-detect) */ static void q6usb_connector_control_init(struct snd_soc_component *component) { int ret;

+ ret = snd_ctl_add(component->card->snd_card, + snd_ctl_new1(&q6usb_offload_control, component)); + if (ret < 0) + return; + ret = snd_ctl_add(component->card->snd_card, snd_ctl_new1(&q6usb_offload_dev_ctrl, component)); if (ret < 0) @@ -229,8 +323,12 @@ static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, int card_idx, mutex_lock(&data->mutex); if (connected) { snd_soc_dapm_enable_pin(dapm, "USB_RX_BE"); - /* We only track the latest USB headset plugged in */ - if (!data->idx_valid || data->sel_card_idx < 0) + /* + * Update the latest USB headset plugged in, if session is + * idle. + */ + if ((!data->idx_valid || data->sel_card_idx < 0) && + !data->status[data->sel_card_idx].prepared) data->sel_card_idx = card_idx;

set_bit(card_idx, &data->available_card_slot);

In case of notifying SND platform drivers of connection events, some of these use cases, such as offloading, require an ASoC USB backend device to be initialized before the events can be handled. If the USB backend device has not yet been probed, this leads to missing initial USB audio device connection events.

Expose an API that traverses the usb_chip array for connected devices, and to call the respective connection callback registered to the SND platform driver.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/usb/card.c | 19 +++++++++++++++++++ sound/usb/card.h | 2 ++ 2 files changed, 21 insertions(+)

diff --git a/sound/usb/card.c b/sound/usb/card.c index e51461ac33cd..25267c1cc64e 100644 --- a/sound/usb/card.c +++ b/sound/usb/card.c @@ -170,6 +170,25 @@ struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, } EXPORT_SYMBOL_GPL(snd_usb_find_suppported_substream);

+/* + * in case the platform driver was not ready at the time of USB SND + * device connect, expose an API to discover all connected USB devices + * so it can populate any dependent resources/structures. + */ +void snd_usb_rediscover_devices(void) +{ + int i; + + mutex_lock(&register_mutex); + for (i = 0; i < SNDRV_CARDS; i++) { + if (usb_chip[i]) + if (platform_ops && platform_ops->connect_cb) + platform_ops->connect_cb(usb_chip[i]); + } + mutex_unlock(&register_mutex); +} +EXPORT_SYMBOL_GPL(snd_usb_rediscover_devices); + /* * disconnect streams * called from usb_audio_disconnect() diff --git a/sound/usb/card.h b/sound/usb/card.h index 922868d2dccd..7bbaee87a48a 100644 --- a/sound/usb/card.h +++ b/sound/usb/card.h @@ -219,6 +219,7 @@ int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops); int snd_usb_unregister_platform_ops(void); struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, struct snd_pcm_hw_params *params, int direction); +void snd_usb_rediscover_devices(void); #else int snd_usb_register_platform_ops(struct snd_usb_platform_ops *ops) { @@ -235,5 +236,6 @@ struct snd_usb_stream *snd_usb_find_suppported_substream(int card_idx, { return NULL; } +void snd_usb_rediscover_devices(void) { } #endif /* IS_ENABLED(CONFIG_SND_USB_AUDIO) */ #endif /* __USBAUDIO_CARD_H */

In case the USB backend device has not been initialized/probed, USB SND device connections can still occur. When the USB backend is eventually made available, previous USB SND device connections are not communicated to the USB backend. Call snd_usb_rediscover_devices() to generate the connect callbacks for all USB SND devices connected. This will allow for the USB backend to be updated with the current set of devices available.

Signed-off-by: Wesley Cheng quic_wcheng@quicinc.com --- sound/soc/soc-usb.c | 2 ++ 1 file changed, 2 insertions(+)

diff --git a/sound/soc/soc-usb.c b/sound/soc/soc-usb.c index 84dc6d0b2eab..a9413e3d18df 100644 --- a/sound/soc/soc-usb.c +++ b/sound/soc/soc-usb.c @@ -111,6 +111,8 @@ struct snd_soc_usb *snd_soc_usb_add_port(struct device *dev, void *priv, list_add_tail(&usb->list, &usb_ctx_list); mutex_unlock(&ctx_mutex);

+ snd_usb_rediscover_devices(); + return usb; } EXPORT_SYMBOL_GPL(snd_soc_usb_add_port);