diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/class/audio/app_usbd_audio.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/class/audio/app_usbd_audio.c | 813 |
1 files changed, 813 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/class/audio/app_usbd_audio.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/class/audio/app_usbd_audio.c new file mode 100644 index 0000000..19e5a36 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/libraries/usbd/class/audio/app_usbd_audio.c @@ -0,0 +1,813 @@ +/** + * Copyright (c) 2016 - 2018, Nordic Semiconductor ASA + * + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, this + * list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form, except as embedded into a Nordic + * Semiconductor ASA integrated circuit in a product or a software update for + * such product, must reproduce the above copyright notice, this list of + * conditions and the following disclaimer in the documentation and/or other + * materials provided with the distribution. + * + * 3. Neither the name of Nordic Semiconductor ASA nor the names of its + * contributors may be used to endorse or promote products derived from this + * software without specific prior written permission. + * + * 4. This software, with or without modification, must only be used with a + * Nordic Semiconductor ASA integrated circuit. + * + * 5. Any software provided in binary form under this license must not be reverse + * engineered, decompiled, modified and/or disassembled. + * + * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS + * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE + * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE + * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + */ +#include "sdk_common.h" +#if NRF_MODULE_ENABLED(APP_USBD_AUDIO) + +#include "app_usbd_audio.h" +#include "app_util_platform.h" + +/** + * @defgroup app_usbd_audio_internals USBD Audio internals + * @{ + * @ingroup app_usbd_audio + * @internal + */ + +STATIC_ASSERT(sizeof(app_usbd_audio_ac_iface_header_desc_t) == 8); +STATIC_ASSERT(sizeof(app_usbd_audio_input_terminal_desc_t) == 12); +STATIC_ASSERT(sizeof(app_usbd_audio_output_terminal_desc_t) == 9); +STATIC_ASSERT(sizeof(app_usbd_audio_feature_unit_desc_t) == 6); +STATIC_ASSERT(sizeof(app_usbd_audio_as_iface_desc_t) == 7); +STATIC_ASSERT(sizeof(app_usbd_audio_as_format_type_one_desc_t) == 8); +STATIC_ASSERT(sizeof(app_usbd_audio_as_format_type_two_desc_t) == 9); +STATIC_ASSERT(sizeof(app_usbd_audio_as_format_type_three_desc_t) == 8); +STATIC_ASSERT(sizeof(app_usbd_audio_as_endpoint_desc_t) == 7); + +#define APP_USBD_AUDIO_CONTROL_IFACE_IDX 0 /**< Audio class control interface index */ +#define APP_USBD_AUDIO_STREAMING_IFACE_IDX 1 /**< Audio class streaming interface index */ + +#define APP_USBD_CDC_AUDIO_STREAMING_EP_IDX 0 /**< Audio streaming isochronous endpoint index */ + +/** + * @brief Auxiliary function to access audio class instance data + * + * @param[in] p_inst Class instance data + * @return Audio class instance data @ref app_usbd_audio_t + */ +static inline app_usbd_audio_t const * audio_get(app_usbd_class_inst_t const * p_inst) +{ + ASSERT(p_inst != NULL); + return (app_usbd_audio_t const *)p_inst; +} + + +/** + * @brief Auxiliary function to access audio class context data + * + * @param[in] p_audio Audio class instance data + * @return Audio class context data @ref app_usbd_audio_ctx_t + */ +static inline app_usbd_audio_ctx_t * audio_ctx_get(app_usbd_audio_t const * p_audio) +{ + ASSERT(p_audio != NULL); + ASSERT(p_audio->specific.p_data != NULL); + return &p_audio->specific.p_data->ctx; +} + + +/** + * @brief User event handler + * + * @param[in] p_inst Class instance + * @param[in] event user Event type @ref app_usbd_audio_user_event_t + */ +static inline void user_event_handler( + app_usbd_class_inst_t const * p_inst, + app_usbd_audio_user_event_t event) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + if (p_audio->specific.inst.user_ev_handler != NULL) + { + p_audio->specific.inst.user_ev_handler(p_inst, event); + } +} + + +/** + * @brief Select interface + * + * @param[in,out] p_inst Instance of the class + * @param[in] iface_idx Index of the interface inside class structure + * @param[in] alternate Alternate setting that should be selected + */ +static ret_code_t iface_select( + app_usbd_class_inst_t const * const p_inst, + uint8_t iface_idx, + uint8_t alternate) +{ + app_usbd_class_iface_conf_t const * p_iface = app_usbd_class_iface_get(p_inst, iface_idx); + /* Simple check if this is data interface */ + uint8_t const ep_count = app_usbd_class_iface_ep_count_get(p_iface); + + if (ep_count > 0) + { + if (alternate > 1) + { + return NRF_ERROR_INVALID_PARAM; + } + app_usbd_audio_t const * p_audio = audio_get(p_inst); + app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio); + p_audio_ctx->streaming = (alternate != 0); + + uint8_t i; + + for (i = 0; i < ep_count; ++i) + { + nrf_drv_usbd_ep_t ep_addr = + app_usbd_class_ep_address_get(app_usbd_class_iface_ep_get(p_iface, i)); + if (alternate) + { + app_usbd_ep_enable(ep_addr); + } + else + { + app_usbd_ep_disable(ep_addr); + } + } + return NRF_SUCCESS; + } + return NRF_ERROR_NOT_SUPPORTED; +} + + +static void iface_deselect( + app_usbd_class_inst_t const * const p_inst, + uint8_t iface_idx) +{ + app_usbd_class_iface_conf_t const * p_iface = app_usbd_class_iface_get(p_inst, iface_idx); + + /* Simple check if this is data interface */ + if (p_iface->ep_cnt > 0) + { + app_usbd_audio_t const * p_audio = audio_get(p_inst); + app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio); + p_audio_ctx->streaming = false; + } + /* Note that all the interface endpoints would be disabled automatically after this function */ +} + + +static uint8_t iface_selection_get( + app_usbd_class_inst_t const * const p_inst, + uint8_t iface_idx) +{ + app_usbd_class_iface_conf_t const * p_iface = app_usbd_class_iface_get(p_inst, iface_idx); + /* Simple check if this is data interface */ + uint8_t const ep_count = app_usbd_class_iface_ep_count_get(p_iface); + + if (ep_count > 0) + { + app_usbd_audio_t const * p_audio = audio_get(p_inst); + app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio); + return (p_audio_ctx->streaming) ? 1 : 0; + } + return 0; +} + + +/** + * @brief Internal SETUP standard IN request handler + * + * @param[in] p_inst Generic class instance + * @param[in] p_setup_ev Setup event + * + * @return Standard error code + * @retval NRF_SUCCESS if request handled correctly + * @retval NRF_ERROR_NOT_SUPPORTED if request is not supported + */ +static ret_code_t setup_req_std_in(app_usbd_class_inst_t const * p_inst, + app_usbd_setup_evt_t const * p_setup_ev) +{ + /* Only Get Descriptor standard IN request is supported by Audio class */ + if ((app_usbd_setup_req_rec(p_setup_ev->setup.bmRequestType) == APP_USBD_SETUP_REQREC_INTERFACE) + && + (p_setup_ev->setup.bmRequest == APP_USBD_SETUP_STDREQ_GET_DESCRIPTOR)) + { + size_t dsc_len = 0; + size_t max_size; + + uint8_t * p_trans_buff = app_usbd_core_setup_transfer_buff_get(&max_size); + + /* Try to find descriptor in class internals*/ + ret_code_t ret = app_usbd_class_descriptor_find( + p_inst, + p_setup_ev->setup.wValue.hb, + p_setup_ev->setup.wValue.lb, + p_trans_buff, + &dsc_len); + + if (ret != NRF_ERROR_NOT_FOUND) + { + ASSERT(dsc_len < NRF_DRV_USBD_EPSIZE); + return app_usbd_core_setup_rsp(&(p_setup_ev->setup), p_trans_buff, dsc_len); + } + } + + return NRF_ERROR_NOT_SUPPORTED; +} + + +/** + * @brief Internal SETUP class IN request handler + * + * @param[in] p_inst Generic class instance + * @param[in] p_setup_ev Setup event + * + * @return Standard error code + * @retval NRF_SUCCESS if request handled correctly + * @retval NRF_ERROR_NOT_SUPPORTED if request is not supported + */ +static ret_code_t setup_req_class_in( + app_usbd_class_inst_t const * p_inst, + app_usbd_setup_evt_t const * p_setup_ev) +{ + switch (p_setup_ev->setup.bmRequest) + { + case APP_USBD_AUDIO_REQ_GET_CUR: + case APP_USBD_AUDIO_REQ_GET_MIN: + case APP_USBD_AUDIO_REQ_GET_MAX: + case APP_USBD_AUDIO_REQ_SET_RES: + case APP_USBD_AUDIO_REQ_GET_MEM: + { + app_usbd_audio_t const * p_audio = audio_get(p_inst); + app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio); + + + p_audio_ctx->request.req_type = (app_usbd_audio_req_type_t)p_setup_ev->setup.bmRequest; + p_audio_ctx->request.control = p_setup_ev->setup.wValue.hb; + p_audio_ctx->request.channel = p_setup_ev->setup.wValue.lb; + p_audio_ctx->request.interface = p_setup_ev->setup.wIndex.hb; + p_audio_ctx->request.entity = p_setup_ev->setup.wIndex.lb; + + p_audio_ctx->request.length = p_setup_ev->setup.wLength.w; + + p_audio_ctx->request.req_target = APP_USBD_AUDIO_CLASS_REQ_IN; + + app_usbd_setup_reqrec_t rec = app_usbd_setup_req_rec(p_setup_ev->setup.bmRequestType); + if (rec == APP_USBD_SETUP_REQREC_ENDPOINT) + { + p_audio_ctx->request.req_target = APP_USBD_AUDIO_EP_REQ_IN; + } + + user_event_handler((app_usbd_class_inst_t const *)p_audio, + APP_USBD_AUDIO_USER_EVT_CLASS_REQ); + + return app_usbd_core_setup_rsp(&p_setup_ev->setup, + p_audio_ctx->request.payload, + p_audio_ctx->request.length); + } + + default: + break; + } + + return NRF_ERROR_NOT_SUPPORTED; +} + + +static ret_code_t audio_req_out_data_cb(nrf_drv_usbd_ep_status_t status, void * p_context) +{ + if (status == NRF_USBD_EP_OK) + { + app_usbd_audio_t const * p_audio = p_context; + + user_event_handler((app_usbd_class_inst_t const *)p_audio, + APP_USBD_AUDIO_USER_EVT_CLASS_REQ); + } + + return NRF_SUCCESS; +} + + +static ret_code_t audio_req_out( + app_usbd_class_inst_t const * p_inst, + app_usbd_setup_evt_t const * p_setup_ev) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + app_usbd_audio_ctx_t * p_audio_ctx = audio_ctx_get(p_audio); + + + p_audio_ctx->request.req_type = (app_usbd_audio_req_type_t)p_setup_ev->setup.bmRequest; + p_audio_ctx->request.control = p_setup_ev->setup.wValue.hb; + p_audio_ctx->request.channel = p_setup_ev->setup.wValue.lb; + p_audio_ctx->request.interface = p_setup_ev->setup.wIndex.hb; + p_audio_ctx->request.entity = p_setup_ev->setup.wIndex.lb; + + p_audio_ctx->request.length = p_setup_ev->setup.wLength.w; + + p_audio_ctx->request.req_target = APP_USBD_AUDIO_CLASS_REQ_OUT; + if (app_usbd_setup_req_rec(p_setup_ev->setup.bmRequestType) == APP_USBD_SETUP_REQREC_ENDPOINT) + { + p_audio_ctx->request.req_target = APP_USBD_AUDIO_EP_REQ_OUT; + } + + /*Request setup data*/ + NRF_DRV_USBD_TRANSFER_OUT(transfer, p_audio_ctx->request.payload, p_audio_ctx->request.length); + ret_code_t ret; + CRITICAL_REGION_ENTER(); + ret = app_usbd_ep_transfer(NRF_DRV_USBD_EPOUT0, &transfer); + if (ret == NRF_SUCCESS) + { + app_usbd_core_setup_data_handler_desc_t desc = { + .handler = audio_req_out_data_cb, + .p_context = (void *)p_audio + }; + + ret = app_usbd_core_setup_data_handler_set(NRF_DRV_USBD_EPOUT0, &desc); + } + CRITICAL_REGION_EXIT(); + + return ret; +} + + +/** + * @brief Internal SETUP class OUT request handler + * + * @param[in] p_inst Generic class instance + * @param[in] p_setup_ev Setup event + * + * @return Standard error code + * @retval NRF_SUCCESS if request handled correctly + * @retval NRF_ERROR_NOT_SUPPORTED if request is not supported + */ +static ret_code_t setup_req_class_out( + app_usbd_class_inst_t const * p_inst, + app_usbd_setup_evt_t const * p_setup_ev) +{ + switch (p_setup_ev->setup.bmRequest) + { + case APP_USBD_AUDIO_REQ_SET_CUR: + case APP_USBD_AUDIO_REQ_SET_MIN: + case APP_USBD_AUDIO_REQ_SET_MAX: + case APP_USBD_AUDIO_REQ_SET_RES: + case APP_USBD_AUDIO_REQ_SET_MEM: + return audio_req_out(p_inst, p_setup_ev); + + default: + break; + } + + return NRF_ERROR_NOT_SUPPORTED; +} + + +/** + * @brief Control endpoint handle + * + * @param[in] p_inst Generic class instance + * @param[in] p_setup_ev Setup event + * + * @return Standard error code + * @retval NRF_SUCCESS if request handled correctly + * @retval NRF_ERROR_NOT_SUPPORTED if request is not supported + */ +static ret_code_t setup_event_handler( + app_usbd_class_inst_t const * p_inst, + app_usbd_setup_evt_t const * p_setup_ev) +{ + ASSERT(p_inst != NULL); + ASSERT(p_setup_ev != NULL); + + if (app_usbd_setup_req_dir(p_setup_ev->setup.bmRequestType) == APP_USBD_SETUP_REQDIR_IN) + { + switch (app_usbd_setup_req_typ(p_setup_ev->setup.bmRequestType)) + { + case APP_USBD_SETUP_REQTYPE_STD: + return setup_req_std_in(p_inst, p_setup_ev); + + case APP_USBD_SETUP_REQTYPE_CLASS: + return setup_req_class_in(p_inst, p_setup_ev); + + default: + break; + } + } + else /*APP_USBD_SETUP_REQDIR_OUT*/ + { + switch (app_usbd_setup_req_typ(p_setup_ev->setup.bmRequestType)) + { + case APP_USBD_SETUP_REQTYPE_CLASS: + return setup_req_class_out(p_inst, p_setup_ev); + + default: + break; + } + } + + return NRF_ERROR_NOT_SUPPORTED; +} + + +/** + * @brief Endpoint IN event handler + * + * @param[in] p_inst Generic class instance + * + * @return Standard error code + * @retval NRF_SUCCESS if request handled correctly + * @retval NRF_ERROR_NOT_SUPPORTED if request is not supported + */ +static ret_code_t endpoint_in_event_handler(app_usbd_class_inst_t const * p_inst) +{ + user_event_handler(p_inst, APP_USBD_AUDIO_USER_EVT_TX_DONE); + return NRF_SUCCESS; +} + + +/** + * @brief Endpoint OUT event handler + * + * @param[in] p_inst Generic class instance + * + * @return Standard error code + * @retval NRF_SUCCESS if request handled correctly + * @retval NRF_ERROR_NOT_SUPPORTED if request is not supported + */ +static ret_code_t endpoint_out_event_handler(app_usbd_class_inst_t const * p_inst) +{ + user_event_handler(p_inst, APP_USBD_AUDIO_USER_EVT_RX_DONE); + return NRF_SUCCESS; +} + + +/** + * @brief Auxiliary function to access isochronous endpoint address + * + * @param[in] p_inst Class instance data + * + * @return ISO endpoint address + */ +static inline nrf_drv_usbd_ep_t ep_iso_addr_get(app_usbd_class_inst_t const * p_inst) +{ + app_usbd_class_iface_conf_t const * class_iface; + + class_iface = app_usbd_class_iface_get(p_inst, APP_USBD_AUDIO_STREAMING_IFACE_IDX); + + app_usbd_class_ep_conf_t const * ep_cfg; + ep_cfg = app_usbd_class_iface_ep_get(class_iface, APP_USBD_CDC_AUDIO_STREAMING_EP_IDX); + + return app_usbd_class_ep_address_get(ep_cfg); +} + + +/** + * @brief @ref app_usbd_class_methods_t::event_handler + */ +static ret_code_t audio_event_handler( + app_usbd_class_inst_t const * p_inst, + app_usbd_complex_evt_t const * p_event) +{ + ASSERT(p_inst != NULL); + ASSERT(p_event != NULL); + + ret_code_t ret = NRF_SUCCESS; + + switch (p_event->app_evt.type) + { + case APP_USBD_EVT_DRV_RESET: + break; + + case APP_USBD_EVT_DRV_SETUP: + ret = setup_event_handler(p_inst, (app_usbd_setup_evt_t const *)p_event); + break; + + case APP_USBD_EVT_DRV_EPTRANSFER: + if (NRF_USBD_EPIN_CHECK(p_event->drv_evt.data.eptransfer.ep)) + { + ret = endpoint_in_event_handler(p_inst); + } + else + { + ret = endpoint_out_event_handler(p_inst); + } + break; + + case APP_USBD_EVT_DRV_SUSPEND: + break; + + case APP_USBD_EVT_DRV_RESUME: + break; + + case APP_USBD_EVT_INST_APPEND: + break; + + case APP_USBD_EVT_INST_REMOVE: + break; + + case APP_USBD_EVT_STARTED: + break; + + case APP_USBD_EVT_STOPPED: + break; + + default: + ret = NRF_ERROR_NOT_SUPPORTED; + break; + } + + return ret; +} + + +static size_t audio_get_format_descriptor_size(app_usbd_class_inst_t const * p_inst) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_format_dsc->size; +} + + +static size_t audio_get_format_descriptor_data(app_usbd_class_inst_t const * p_inst, + uint32_t cur_byte) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_format_dsc->p_data[cur_byte]; +} + + +static size_t audio_get_input_descriptor_size(app_usbd_class_inst_t const * p_inst) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_input_dsc->size; +} + + +static size_t audio_get_input_descriptor_data(app_usbd_class_inst_t const * p_inst, + uint32_t cur_byte) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_input_dsc->p_data[cur_byte]; +} + + +static size_t audio_get_output_descriptor_size(app_usbd_class_inst_t const * p_inst) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_output_dsc->size; +} + + +static size_t audio_get_output_descriptor_data(app_usbd_class_inst_t const * p_inst, + uint32_t cur_byte) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_output_dsc->p_data[cur_byte]; +} + + +static size_t audio_get_feature_descriptor_size(app_usbd_class_inst_t const * p_inst) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_feature_dsc->size; +} + + +static size_t audio_get_feature_descriptor_data(app_usbd_class_inst_t const * p_inst, + uint32_t cur_byte) +{ + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + return p_audio->specific.inst.p_feature_dsc->p_data[cur_byte]; +} + + +static uint8_t audio_get_control_interface_number(app_usbd_class_inst_t const * p_inst) +{ + app_usbd_class_iface_conf_t const * ifce = 0; + + ifce = app_usbd_class_iface_get(p_inst, 0); + return app_usbd_class_iface_number_get(ifce); +} + + +/** + * @brief @ref app_usbd_class_methods_t::feed_descriptors + */ + +static bool audio_feed_descriptors(app_usbd_class_descriptor_ctx_t * p_ctx, + app_usbd_class_inst_t const * p_inst, + uint8_t * p_buff, + size_t max_size) +{ + static uint8_t ifaces = 0; + ifaces = app_usbd_class_iface_count_get(p_inst); + ASSERT(ifaces == 2); + app_usbd_audio_t const * p_audio = audio_get(p_inst); + + APP_USBD_CLASS_DESCRIPTOR_BEGIN(p_ctx, p_buff, max_size); + + /* CONTROL INTERFACE DESCRIPTOR */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType = Interface + + static app_usbd_class_iface_conf_t const * p_cur_iface = NULL; + p_cur_iface = app_usbd_class_iface_get(p_inst, 0); + + APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_number_get(p_cur_iface)); // bInterfaceNumber + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting + APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_ep_count_get(p_cur_iface)); // bNumEndpoints + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS); // bInterfaceClass = Audio + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_SUBCLASS_AUDIOCONTROL); // bInterfaceSubclass (Audio Control) + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS_PROTOCOL_UNDEFINED); // bInterfaceProtocol + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface + + /* HEADER INTERFACE */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_DESCRIPTOR_INTERFACE); // bDescriptorType = Audio Interfaces + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_AC_IFACE_SUBTYPE_HEADER); // bDescriptorSubtype = Header + APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(0x0100)); // bcdADC LSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(0x0100)); // bcdADC MSB + + static uint16_t header_desc_len = 0; + header_desc_len = 9 + audio_get_feature_descriptor_size(p_inst) + + audio_get_input_descriptor_size(p_inst) + audio_get_output_descriptor_size( + p_inst); + APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(header_desc_len)); // wTotalLength LSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(header_desc_len)); // wTotalLength MSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x01); // bInCollection + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // baInterfaceNr(1) + + /* INPUT TERMINAL DESCRIPTOR */ + static uint32_t cur_byte = 0; + static size_t input_desc_size = 0; + input_desc_size = audio_get_input_descriptor_size(p_inst); + + for (cur_byte = 0; cur_byte < input_desc_size; cur_byte++) + { + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_input_descriptor_data(p_inst, cur_byte)); + } + + /* FEATURE UNIT DESCRIPTOR */ + static size_t feature_desc_size = 0; + feature_desc_size = audio_get_feature_descriptor_size(p_inst); + + for (cur_byte = 0; cur_byte < feature_desc_size; cur_byte++) + { + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_feature_descriptor_data(p_inst, cur_byte)); + } + + /* OUTPUT TERMINAL DESCRIPTOR */ + static size_t output_desc_size = 0; + output_desc_size = audio_get_output_descriptor_size(p_inst); + + for (cur_byte = 0; cur_byte < output_desc_size; cur_byte++) + { + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_output_descriptor_data(p_inst, cur_byte)); + } + + p_cur_iface++; + + /* STREAM INTERFACE DESCRIPTOR ALT 0 */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType = Interface + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // bInterfaceNumber + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bAlternateSetting + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bNumEndpoints + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS); // bInterfaceClass = Audio + APP_USBD_CLASS_DESCRIPTOR_WRITE(p_audio->specific.inst.type_streaming); // bInterfaceSubclass (Audio Control) + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS_PROTOCOL_UNDEFINED); // bInterfaceProtocol + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface + + /* STREAM INTERFACE DESCRIPTOR ALT 1 */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_INTERFACE); // bDescriptorType = Interface + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // bInterfaceNumber + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x01); // bAlternateSetting + APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_iface_ep_count_get(p_cur_iface)); // bNumEndpoints + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS); // bInterfaceClass = Audio + APP_USBD_CLASS_DESCRIPTOR_WRITE(p_audio->specific.inst.type_streaming); // bInterfaceSubclass (Audio Control) + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_CLASS_PROTOCOL_UNDEFINED); // bInterfaceProtocol + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // iInterface + + /* AudioStreaming GENERAL DESCRIPTOR */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x07); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_DESCRIPTOR_INTERFACE); // bDescriptorType = Audio Interface + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_AS_IFACE_SUBTYPE_GENERAL); // bDescriptorSubtype = General + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_control_interface_number(p_inst) + 1); // bTerminalLink + APP_USBD_CLASS_DESCRIPTOR_WRITE(p_audio->specific.inst.delay); // bDelay + APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_audio->specific.inst.format)); // wFormatTag LSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_audio->specific.inst.format)); // wFormatTag MSB + + /* FORMAT DESCRIPTOR */ + static size_t format_desc_size = 0; + format_desc_size = audio_get_format_descriptor_size(p_inst); + + for (cur_byte = 0; cur_byte < format_desc_size; cur_byte++) + { + APP_USBD_CLASS_DESCRIPTOR_WRITE(audio_get_format_descriptor_data(p_inst, cur_byte)); + } + + /* ENDPOINT GENERAL DESCRIPTOR */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x07); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_DESCRIPTOR_ENDPOINT); // bDescriptorType = Audio Descriptor + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_AUDIO_EP_SUBTYPE_GENERAL); // bDescriptorSubtype = EP General + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bmAttributes + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bLockDelayUnits + APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(0x0000)); // wLockDelay LSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(0x0000)); // wLockDelay MSB + + /* ENDPOINT ISO DESCRIPTOR */ + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x09); // bLength + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_ENDPOINT); // bDescriptorType = Endpoint + + static app_usbd_class_ep_conf_t const * p_cur_ep = NULL; + p_cur_ep = app_usbd_class_iface_ep_get(p_cur_iface, 0); + APP_USBD_CLASS_DESCRIPTOR_WRITE(app_usbd_class_ep_address_get(p_cur_ep)); // bEndpointAddress + APP_USBD_CLASS_DESCRIPTOR_WRITE(APP_USBD_DESCRIPTOR_EP_ATTR_TYPE_ISOCHRONOUS); // bmAttributes + APP_USBD_CLASS_DESCRIPTOR_WRITE(LSB_16(p_audio->specific.inst.ep_size)); // wMaxPacketSize LSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(MSB_16(p_audio->specific.inst.ep_size)); // wMaxPacketSize MSB + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x01); // bInterval + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bRefresh + APP_USBD_CLASS_DESCRIPTOR_WRITE(0x00); // bSynchAddress + + APP_USBD_CLASS_DESCRIPTOR_END(); +} + +/** @} */ + +const app_usbd_class_methods_t app_usbd_audio_class_methods = { + .event_handler = audio_event_handler, + .feed_descriptors = audio_feed_descriptors, + .iface_select = iface_select, + .iface_deselect = iface_deselect, + .iface_selection_get = iface_selection_get, +}; + + +size_t app_usbd_audio_class_rx_size_get(app_usbd_class_inst_t const * p_inst) +{ + nrf_drv_usbd_ep_t ep_addr; + + ep_addr = ep_iso_addr_get(p_inst); + ASSERT(NRF_USBD_EPISO_CHECK(ep_addr)); + + return (size_t)nrf_drv_usbd_epout_size_get(ep_addr); +} + + +ret_code_t app_usbd_audio_class_rx_start( + app_usbd_class_inst_t const * p_inst, + void * p_buff, + size_t size) +{ + nrf_drv_usbd_ep_t ep_addr; + + ep_addr = ep_iso_addr_get(p_inst); + ASSERT(NRF_USBD_EPISO_CHECK(ep_addr)); + + NRF_DRV_USBD_TRANSFER_OUT(transfer, p_buff, size); + return app_usbd_ep_transfer(ep_addr, &transfer); +} + + +ret_code_t app_usbd_audio_class_tx_start( + app_usbd_class_inst_t const * p_inst, + const void * p_buff, + size_t size) +{ + nrf_drv_usbd_ep_t ep_addr; + + ep_addr = ep_iso_addr_get(p_inst); + ASSERT(NRF_USBD_EPISO_CHECK(ep_addr)); + + NRF_DRV_USBD_TRANSFER_IN(transfer, p_buff, size); + return app_usbd_ep_transfer(ep_addr, &transfer); +} + + +#endif //NRF_MODULE_ENABLED(APP_USBD_AUDIO) |