/**
* Copyright (c) 2016 - 2017, 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_config.h"
#if USBD_ENABLED
#include "nrf_drv_usbd.h"
#include "nrf.h"
#include "nordic_common.h"
#include "nrf_drv_common.h"
#include "nrf_atomic.h"
#include "nrf_delay.h"
#include "nrf_drv_clock.h"
#include "app_util_platform.h"
#include <string.h>
#include <inttypes.h>
#define NRF_LOG_MODULE_NAME ""
#if NRF_USBD_DRV_LOG_ENABLED
#else //NRF_USBD_DRV_LOG_ENABLED
#define NRF_LOG_LEVEL 0
#endif //NRF_USBD_DRV_LOG_ENABLED
#include "nrf_log.h"
#ifndef NRF_DRV_USBD_EARLY_DMA_PROCESS
/* Try to process DMA request when endpoint transmission has been detected
* and just after last EasyDMA has been processed.
* It speeds up the transmission a little (about 10% measured)
* with a cost of more CPU power used.
*/
#define NRF_DRV_USBD_EARLY_DMA_PROCESS 1
#endif
#ifndef NRF_DRV_USBD_PROTO1_FIX
/* Fix event system */
#define NRF_DRV_USBD_PROTO1_FIX 1
#endif
#ifndef NRF_DRV_USBD_PROTO1_FIX_DEBUG
/* Debug information when events are fixed*/
#define NRF_DRV_USBD_PROTO1_FIX_DEBUG 1
#endif
#if NRF_DRV_USBD_PROTO1_FIX_DEBUG
#include "nrf_log.h"
#define NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(...) NRF_LOG_DEBUG(__VA_ARGS__)
#else
#define NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(...) do {} while (0)
#endif
#ifndef NRF_DRV_USBD_STARTED_EV_ENABLE
#define NRF_DRV_USBD_STARTED_EV_ENABLE 1
#endif
#ifndef NRF_USBD_ISO_DEBUG
/* Also generate information about ISOCHRONOUS events and transfers.
* Turn this off if no ISOCHRONOUS transfers are going to be debugged and this
* option generates a lot of useless messages. */
#define NRF_USBD_ISO_DEBUG 1
#endif
#ifndef NRF_USBD_FAILED_TRANSFERS_DEBUG
/* Also generate debug information for failed transfers.
* It might be useful but may generate a lot of useless debug messages
* in some library usages (for example when transfer is generated and the
* result is used to check whatever endpoint was busy. */
#define NRF_USBD_FAILED_TRANSFERS_DEBUG 1
#endif
#ifndef NRF_USBD_DMAREQ_PROCESS_DEBUG
/* Generate additional messages that mark the status inside
* @ref usbd_dmareq_process.
* It is useful to debug library internals but may generate a lot of
* useless debug messages. */
#define NRF_USBD_DMAREQ_PROCESS_DEBUG 1
#endif
#if NRF_DRV_USBD_PROTO1_FIX
#include "nrf_drv_systick.h"
#endif
/**
* @defgroup nrf_usbdraw_drv_int USB Device driver internal part
* @internal
* @ingroup nrf_usbdraw_drv
*
* This part contains auxiliary internal macros, variables and functions.
* @{
*/
/**
* @brief Assert endpoint number validity
*
* Internal macro to be used during program creation in debug mode.
* Generates assertion if endpoint number is not valid.
*
* @param ep Endpoint number to validity check
*/
#define USBD_ASSERT_EP_VALID(ep) ASSERT( \
((NRF_USBD_EPIN_CHECK(ep) && (NRF_USBD_EP_NR_GET(ep) < NRF_USBD_EPIN_CNT )) \
|| \
(NRF_USBD_EPOUT_CHECK(ep) && (NRF_USBD_EP_NR_GET(ep) < NRF_USBD_EPOUT_CNT))) \
);
/**
* @brief Lowest position of bit for IN endpoint
*
* The first bit position corresponding to IN endpoint.
* @sa ep2bit bit2ep
*/
#define USBD_EPIN_BITPOS_0 0
/**
* @brief Lowest position of bit for OUT endpoint
*
* The first bit position corresponding to OUT endpoint
* @sa ep2bit bit2ep
*/
#define USBD_EPOUT_BITPOS_0 16
/**
* @brief Input endpoint bits mask
*/
#define USBD_EPIN_BIT_MASK (0xFFFFU << USBD_EPIN_BITPOS_0)
/**
* @brief Output endpoint bits mask
*/
#define USBD_EPOUT_BIT_MASK (0xFFFFU << USBD_EPOUT_BITPOS_0)
/**
* @brief Auxiliary macro to change EP number into bit position
*
* This macro is used by @ref ep2bit function but also for statically check
* the bitpos values integrity during compilation.
*
* @param[in] ep Endpoint number.
* @return Endpoint bit position.
*/
#define USBD_EP_BITPOS(ep) \
((NRF_USBD_EPIN_CHECK(ep) ? USBD_EPIN_BITPOS_0 : USBD_EPOUT_BITPOS_0) + NRF_USBD_EP_NR_GET(ep))
/**
* @brief Helper macro for creating an endpoint transfer event.
*
* @param[in] name Name of the created transfer event variable.
* @param[in] endpoint Endpoint number.
* @param[in] ep_stat Endpoint state to report.
*
* @return Initialized event constant variable.
*/
#define NRF_DRV_USBD_EP_TRANSFER_EVENT(name, endpont, ep_stat) \
const nrf_drv_usbd_evt_t name = { \
NRF_DRV_USBD_EVT_EPTRANSFER, \
.data = { \
.eptransfer = { \
.ep = endpont, \
.status = ep_stat \
} \
} \
}
/* Check it the bit positions values match defined DATAEPSTATUS bit positions */
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN1) == USBD_EPDATASTATUS_EPIN1_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN2) == USBD_EPDATASTATUS_EPIN2_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN3) == USBD_EPDATASTATUS_EPIN3_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN4) == USBD_EPDATASTATUS_EPIN4_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN5) == USBD_EPDATASTATUS_EPIN5_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN6) == USBD_EPDATASTATUS_EPIN6_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPIN7) == USBD_EPDATASTATUS_EPIN7_Pos );
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT1) == USBD_EPDATASTATUS_EPOUT1_Pos);
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT2) == USBD_EPDATASTATUS_EPOUT2_Pos);
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT3) == USBD_EPDATASTATUS_EPOUT3_Pos);
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT4) == USBD_EPDATASTATUS_EPOUT4_Pos);
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT5) == USBD_EPDATASTATUS_EPOUT5_Pos);
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT6) == USBD_EPDATASTATUS_EPOUT6_Pos);
STATIC_ASSERT(USBD_EP_BITPOS(NRF_DRV_USBD_EPOUT7) == USBD_EPDATASTATUS_EPOUT7_Pos);
/**
* @name Internal auxiliary definitions for SETUP packet
*
* Definitions used to take out the information about last SETUP packet direction
* from @c bmRequestType.
* @{
*/
/** The position of DIR bit in bmRequestType inside SETUP packet */
#define USBD_DRV_REQUESTTYPE_DIR_BITPOS 7
/** The mask of DIR bit in bmRequestType inside SETUP packet */
#define USBD_DRV_REQUESTTYPE_DIR_MASK (1U << USBD_DRV_REQUESTTYPE_DIR_BITPOS)
/** The value of DIR bit for OUT direction (Host -> Device) */
#define USBD_DRV_REQUESTTYPE_DIR_OUT (0U << USBD_DRV_REQUESTTYPE_DIR_BITPOS)
/** The value of DIR bit for IN direction (Device -> Host) */
#define USBD_DRV_REQUESTTYPE_DIR_IN (1U << USBD_DRV_REQUESTTYPE_DIR_BITPOS)
/** @} */
/**
* @brief Current driver state
*/
static nrf_drv_state_t m_drv_state = NRF_DRV_STATE_UNINITIALIZED;
/**
* @brief Event handler for the library
*
* Event handler that would be called on events.
*
* @note Currently it cannot be null if any interrupt is activated.
*/
static nrf_drv_usbd_event_handler_t m_event_handler;
/**
* @brief Direction of last received Setup transfer
*
* This variable is used to redirect internal setup data event
* into selected endpoint (IN or OUT).
*/
static nrf_drv_usbd_ep_t m_last_setup_dir;
/**
* @brief Mark endpoint readiness for DMA transfer
*
* Bits in this variable are cleared and set in interrupts.
* 1 means that endpoint is ready for DMA transfer.
* 0 means that DMA transfer cannot be performed on selected endpoint.
*/
static uint32_t m_ep_ready;
/**
* @brief Mark endpoint with prepared data to transfer by DMA
*
* This variable can be from any place in the code (interrupt or main thread).
* It would be cleared only from USBD interrupt.
*
* Mask prepared USBD data for transmission.
* It is cleared when no more data to transmit left.
*/
static uint32_t m_ep_dma_waiting;
/**
* @brief Current EasyDMA state
*
* Single flag, updated only inside interrupts, that marks current EasyDMA state.
* In USBD there is only one DMA channel working in background, and new transfer
* cannot be started when there is ongoing transfer on any other channel.
*/
static uint8_t m_dma_pending;
#if NRF_DRV_USBD_PROTO1_FIX
static uint32_t m_simulated_dataepstatus;
#endif
/**
* @brief The structure that would hold transfer configuration to every endpoint
*
* The structure that holds all the data required by the endpoint to proceed
* with LIST functionality and generate quick callback directly when data
* buffer is ready.
*/
typedef struct
{
nrf_drv_usbd_handler_t handler; //!< Handler for current transfer, function pointer
void * p_context; //!< Context for transfer handler
size_t transfer_cnt; //!< Number of transferred bytes in the current transfer
uint16_t max_packet_size; //!< Configured endpoint size
nrf_drv_usbd_ep_status_t status; //!< NRF_SUCCESS or error code, never NRF_ERROR_BUSY - this one is calculated
}usbd_drv_ep_state_t;
/**
* @brief The array of transfer configurations for the endpoints.
*
* The status of the transfer on each endpoint.
*/
static struct
{
usbd_drv_ep_state_t ep_out[NRF_USBD_EPOUT_CNT]; //!< Status for OUT endpoints.
usbd_drv_ep_state_t ep_in [NRF_USBD_EPIN_CNT ]; //!< Status for IN endpoints.
}m_ep_state;
/**
* @brief Status variables for integrated feeders.
*
* Current status for integrated feeders (IN transfers).
* Integrated feeders are used for default transfers:
* 1. Simple RAM transfer
* 2. Simple flash transfer
* 3. RAM transfer with automatic ZLP
* 4. Flash transfer with automatic ZLP
*/
nrf_drv_usbd_transfer_t m_ep_feeder_state[NRF_USBD_EPIN_CNT];
/**
* @brief Status variables for integrated consumers
*
* Current status for integrated consumers
* Currently one type of transfer is supported:
* 1. Transfer to RAM
*
* Transfer is finished automatically when received data block is smaller
* than the endpoint buffer or all the required data is received.
*/
nrf_drv_usbd_transfer_t m_ep_consumer_state[NRF_USBD_EPOUT_CNT];
/**
* @brief Buffer used to send data directly from FLASH
*
* This is internal buffer that would be used to emulate the possibility
* to transfer data directly from FLASH.
* We do not have to care about the source of data when calling transfer functions.
*
* We do not need more buffers that one, because only one transfer can be pending
* at once.
*/
static uint32_t m_tx_buffer[CEIL_DIV(
NRF_DRV_USBD_FEEDER_BUFFER_SIZE, sizeof(uint32_t))];
/* Early declaration. Documentation above definition. */
static void usbd_dmareq_process(void);
#if NRF_DRV_USBD_PROTO1_FIX
static inline nrf_usbd_event_t nrf_drv_usbd_ep_to_endevent(nrf_drv_usbd_ep_t ep)
{
USBD_ASSERT_EP_VALID(ep);
static const nrf_usbd_event_t epin_endev[] =
{
NRF_USBD_EVENT_ENDEPIN0,
NRF_USBD_EVENT_ENDEPIN1,
NRF_USBD_EVENT_ENDEPIN2,
NRF_USBD_EVENT_ENDEPIN3,
NRF_USBD_EVENT_ENDEPIN4,
NRF_USBD_EVENT_ENDEPIN5,
NRF_USBD_EVENT_ENDEPIN6,
NRF_USBD_EVENT_ENDEPIN7,
NRF_USBD_EVENT_ENDISOIN0
};
static const nrf_usbd_event_t epout_endev[] =
{
NRF_USBD_EVENT_ENDEPOUT0,
NRF_USBD_EVENT_ENDEPOUT1,
NRF_USBD_EVENT_ENDEPOUT2,
NRF_USBD_EVENT_ENDEPOUT3,
NRF_USBD_EVENT_ENDEPOUT4,
NRF_USBD_EVENT_ENDEPOUT5,
NRF_USBD_EVENT_ENDEPOUT6,
NRF_USBD_EVENT_ENDEPOUT7,
NRF_USBD_EVENT_ENDISOOUT0
};
return (NRF_USBD_EPIN_CHECK(ep) ? epin_endev : epout_endev)[NRF_USBD_EP_NR_GET(ep)];
}
#endif
/**
* @brief Get interrupt mask for selected endpoint
*
* @param[in] ep Endpoint number
*
* @return Interrupt mask related to the EasyDMA transfer end for the
* chosen endpoint.
*/
static inline uint32_t nrf_drv_usbd_ep_to_int(nrf_drv_usbd_ep_t ep)
{
USBD_ASSERT_EP_VALID(ep);
static const uint8_t epin_bitpos[] =
{
USBD_INTEN_ENDEPIN0_Pos,
USBD_INTEN_ENDEPIN1_Pos,
USBD_INTEN_ENDEPIN2_Pos,
USBD_INTEN_ENDEPIN3_Pos,
USBD_INTEN_ENDEPIN4_Pos,
USBD_INTEN_ENDEPIN5_Pos,
USBD_INTEN_ENDEPIN6_Pos,
USBD_INTEN_ENDEPIN7_Pos,
USBD_INTEN_ENDISOIN_Pos
};
static const uint8_t epout_bitpos[] =
{
USBD_INTEN_ENDEPOUT0_Pos,
USBD_INTEN_ENDEPOUT1_Pos,
USBD_INTEN_ENDEPOUT2_Pos,
USBD_INTEN_ENDEPOUT3_Pos,
USBD_INTEN_ENDEPOUT4_Pos,
USBD_INTEN_ENDEPOUT5_Pos,
USBD_INTEN_ENDEPOUT6_Pos,
USBD_INTEN_ENDEPOUT7_Pos,
USBD_INTEN_ENDISOOUT_Pos
};
return 1UL << (NRF_USBD_EPIN_CHECK(ep) ? epin_bitpos : epout_bitpos)[NRF_USBD_EP_NR_GET(ep)];
}
/**
* @name Integrated feeders and consumers
*
* Internal, default functions for transfer processing.
* @{
*/
/**
* @brief Integrated consumer to RAM buffer.
*
* @param p_next See @ref nrf_drv_usbd_consumer_t documentation.
* @param p_context See @ref nrf_drv_usbd_consumer_t documentation.
* @param ep_size See @ref nrf_drv_usbd_consumer_t documentation.
* @param data_size See @ref nrf_drv_usbd_consumer_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrf_drv_usbd_consumer(
nrf_drv_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size,
size_t data_size)
{
nrf_drv_usbd_transfer_t * p_transfer = p_context;
ASSERT(ep_size >= data_size);
ASSERT((p_transfer->p_data.rx == NULL) ||
nrf_drv_is_in_RAM((const void*)(p_transfer->p_data.ptr)));
size_t size = p_transfer->size;
if (size < data_size)
{
/* Buffer size to small */
p_next->size = 0;
p_next->p_data = p_transfer->p_data;
}
else
{
p_next->size = data_size;
p_next->p_data = p_transfer->p_data;
size -= data_size;
p_transfer->size = size;
p_transfer->p_data.ptr += data_size;
}
return (ep_size == data_size) && (size != 0);
}
/**
* @brief Integrated feeder from RAM source.
*
* @param[out] p_next See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrf_drv_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrf_drv_usbd_feeder_ram(
nrf_drv_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size)
{
nrf_drv_usbd_transfer_t * p_transfer = p_context;
ASSERT(nrf_drv_is_in_RAM((const void*)(p_transfer->p_data.ptr)));
size_t tx_size = p_transfer->size;
if (tx_size > ep_size)
{
tx_size = ep_size;
}
p_next->p_data = p_transfer->p_data;
p_next->size = tx_size;
p_transfer->size -= tx_size;
p_transfer->p_data.ptr += tx_size;
return (p_transfer->size != 0);
}
/**
* @brief Integrated feeder from RAM source with ZLP.
*
* @param[out] p_next See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrf_drv_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrf_drv_usbd_feeder_ram_zlp(
nrf_drv_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size)
{
nrf_drv_usbd_transfer_t * p_transfer = p_context;
ASSERT(nrf_drv_is_in_RAM((const void*)(p_transfer->p_data.ptr)));
size_t tx_size = p_transfer->size;
if (tx_size > ep_size)
{
tx_size = ep_size;
}
p_next->p_data.tx = (tx_size == 0) ? NULL : p_transfer->p_data.tx;
p_next->size = tx_size;
p_transfer->size -= tx_size;
p_transfer->p_data.ptr += tx_size;
return (tx_size != 0);
}
/**
* @brief Integrated feeder from a flash source.
*
* @param[out] p_next See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrf_drv_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrf_drv_usbd_feeder_flash(
nrf_drv_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size)
{
nrf_drv_usbd_transfer_t * p_transfer = p_context;
ASSERT(!nrf_drv_is_in_RAM((const void*)(p_transfer->p_data.ptr)));
size_t tx_size = p_transfer->size;
void * p_buffer = nrf_drv_usbd_feeder_buffer_get();
if (tx_size > ep_size)
{
tx_size = ep_size;
}
ASSERT(tx_size <= NRF_DRV_USBD_FEEDER_BUFFER_SIZE);
memcpy(p_buffer, (p_transfer->p_data.tx), tx_size);
p_next->p_data.tx = p_buffer;
p_next->size = tx_size;
p_transfer->size -= tx_size;
p_transfer->p_data.ptr += tx_size;
return (p_transfer->size != 0);
}
/**
* @brief Integrated feeder from a flash source with ZLP.
*
* @param[out] p_next See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrf_drv_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrf_drv_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrf_drv_usbd_feeder_flash_zlp(
nrf_drv_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size)
{
nrf_drv_usbd_transfer_t * p_transfer = p_context;
ASSERT(!nrf_drv_is_in_RAM((const void*)(p_transfer->p_data.ptr)));
size_t tx_size = p_transfer->size;
void * p_buffer = nrf_drv_usbd_feeder_buffer_get();
if (tx_size > ep_size)
{
tx_size = ep_size;
}
ASSERT(tx_size <= NRF_DRV_USBD_FEEDER_BUFFER_SIZE);
if (tx_size != 0)
{
memcpy(p_buffer, (p_transfer->p_data.tx), tx_size);
p_next->p_data.tx = p_buffer;
}
else
{
p_next->p_data.tx = NULL;
}
p_next->size = tx_size;
p_transfer->size -= tx_size;
p_transfer->p_data.ptr += tx_size;
return (tx_size != 0);
}
/** @} */
/**
* @brief Change Driver endpoint number to HAL endpoint number
*
* @param ep Driver endpoint identifier
*
* @return Endpoint identifier in HAL
*
* @sa nrf_drv_usbd_ep_from_hal
*/
static inline uint8_t ep_to_hal(nrf_drv_usbd_ep_t ep)
{
USBD_ASSERT_EP_VALID(ep);
return (uint8_t)ep;
}
/**
* @brief Generate start task number for selected endpoint index
*
* @param ep Endpoint number
*
* @return Task for starting EasyDMA transfer on selected endpoint.
*/
static inline nrf_usbd_task_t task_start_ep(nrf_drv_usbd_ep_t ep)
{
USBD_ASSERT_EP_VALID(ep);
return (nrf_usbd_task_t)(
(NRF_USBD_EPIN_CHECK(ep) ? NRF_USBD_TASK_STARTEPIN0 : NRF_USBD_TASK_STARTEPOUT0) +
(NRF_USBD_EP_NR_GET(ep) * sizeof(uint32_t)));
}
/**
* @brief Access selected endpoint state structure
*
* Function used to change or just read the state of selected endpoint.
* It is used for internal transmission state.
*
* @param ep Endpoint number
*/
static inline usbd_drv_ep_state_t* ep_state_access(nrf_drv_usbd_ep_t ep)
{
USBD_ASSERT_EP_VALID(ep);
return ((NRF_USBD_EPIN_CHECK(ep) ? m_ep_state.ep_in : m_ep_state.ep_out) +
NRF_USBD_EP_NR_GET(ep));
}
/**
* @brief Change endpoint number to bit position
*
* Bit positions are defined the same way as they are placed in DATAEPSTATUS register,
* but bits for endpoint 0 are included.
*
* @param ep Endpoint number
*
* @return Bit position related to the given endpoint number
*
* @sa bit2ep
*/
static inline uint8_t ep2bit(nrf_drv_usbd_ep_t ep)
{
USBD_ASSERT_EP_VALID(ep);
return USBD_EP_BITPOS(ep);
}
/**
* @brief Change bit position to endpoint number
*
* @param bitpos Bit position
*
* @return Endpoint number corresponding to given bit position.
*
* @sa ep2bit
*/
static inline nrf_drv_usbd_ep_t bit2ep(uint8_t bitpos)
{
STATIC_ASSERT(USBD_EPOUT_BITPOS_0 > USBD_EPIN_BITPOS_0);
return (nrf_drv_usbd_ep_t)((bitpos >= USBD_EPOUT_BITPOS_0) ?
NRF_USBD_EPOUT(bitpos - USBD_EPOUT_BITPOS_0) : NRF_USBD_EPIN(bitpos));
}
/**
* @brief Start selected EasyDMA transmission
*
* This is internal auxiliary function.
* No checking is made if EasyDMA is ready for new transmission.
*
* @param[in] ep Number of endpoint for transmission.
* If it is OUT endpoint transmission would be directed from endpoint to RAM.
* If it is in endpoint transmission would be directed from RAM to endpoint.
*/
static inline void usbd_dma_start(nrf_drv_usbd_ep_t ep)
{
nrf_usbd_task_trigger(task_start_ep(ep));
}
/**
* @brief Abort pending transfer on selected endpoint
*
* @param ep Endpoint number.
*
* @note
* This function locks interrupts that may be costly.
* It is good idea to test if the endpoint is still busy before calling this function:
* @code
(m_ep_dma_waiting & (1U << ep2bit(ep)))
* @endcode
* This function would check it again, but it makes it inside critical section.
*/
static inline void usbd_ep_abort(nrf_drv_usbd_ep_t ep)
{
CRITICAL_REGION_ENTER();
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EPOUT_CHECK(ep))
{
/* Host -> Device */
if ((~m_ep_dma_waiting) & (1U<<ep2bit(ep)))
{
/* If the bit in m_ep_dma_waiting in cleared - nothing would be
* processed inside transfer processing */
nrf_drv_usbd_transfer_out_drop(ep);
}
else
{
p_state->handler.consumer = NULL;
m_ep_dma_waiting &= ~(1U<<ep2bit(ep));
m_ep_ready &= ~(1U<<ep2bit(ep));
}
/* Aborted */
p_state->status = NRF_USBD_EP_ABORTED;
}
else
{
if ((m_ep_dma_waiting | (~m_ep_ready)) & (1U<<ep2bit(ep)))
{
/* Device -> Host */
m_ep_dma_waiting &= ~(1U<<ep2bit(ep));
m_ep_ready |= 1U<<ep2bit(ep) ;
p_state->handler.feeder = NULL;
p_state->status = NRF_USBD_EP_ABORTED;
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_ABORTED);
m_event_handler(&evt);
}
}
CRITICAL_REGION_EXIT();
}
void usbd_drv_ep_abort(nrf_drv_usbd_ep_t ep)
{
usbd_ep_abort(ep);
}
/**
* @brief Abort all pending endpoints
*
* Function aborts all pending endpoint transfers.
*/
static void usbd_ep_abort_all(void)
{
uint32_t ep_waiting = m_ep_dma_waiting | (m_ep_ready & USBD_EPOUT_BIT_MASK);
while (0 != ep_waiting)
{
uint8_t bitpos = __CLZ(__RBIT(ep_waiting));
usbd_ep_abort(bit2ep(bitpos));
ep_waiting &= ~(1U << bitpos);
}
m_ep_ready = (((1U<<NRF_USBD_EPIN_CNT) - 1U) << USBD_EPIN_BITPOS_0);
}
/**
* @brief Force the USBD interrupt into pending state
*
* This function is used to force USBD interrupt to be processed right now.
* It makes it possible to process all EasyDMA access on one thread priority level.
*/
static inline void usbd_int_rise(void)
{
NVIC_SetPendingIRQ(USBD_IRQn);
}
/**
* @name USBD interrupt runtimes
*
* Interrupt runtimes that would be vectorized using @ref m_ivec_isr
* @{
*/
static void USBD_ISR_Usbreset(void)
{
m_last_setup_dir = NRF_DRV_USBD_EPOUT0;
usbd_ep_abort_all();
const nrf_drv_usbd_evt_t evt = {
.type = NRF_DRV_USBD_EVT_RESET
};
m_event_handler(&evt);
}
static void USBD_ISR_Started(void)
{
#if NRF_DRV_USBD_STARTED_EV_ENABLE
uint32_t epstatus = nrf_usbd_epstatus_get_and_clear();
/* All finished endpoint have to be marked as busy */
// #warning Check this one
// ASSERT(epstatus == ((~m_ep_ready) & epstatus));
while (epstatus)
{
uint8_t bitpos = __CLZ(__RBIT(epstatus));
nrf_drv_usbd_ep_t ep = bit2ep(bitpos);
epstatus &= ~(1UL << bitpos);
UNUSED_VARIABLE(ep);
}
#endif
}
/**
* @brief Handler for EasyDMA event without endpoint clearing.
*
* This handler would be called when EasyDMA transfer for endpoints that does not require clearing.
* All in endpoints are cleared automatically when new EasyDMA transfer is initialized.
* For endpoint 0 see @ref nrf_usbd_ep0out_dma_handler
*
* @param[in] ep Endpoint number
*/
static inline void nrf_usbd_ep0in_dma_handler(void)
{
const nrf_drv_usbd_ep_t ep = NRF_DRV_USBD_EPIN0;
NRF_LOG_DEBUG("USB event: DMA ready IN0\r\n");
m_dma_pending = 0;
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.feeder == NULL)
{
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<ep2bit(ep))));
}
}
/**
* @brief Handler for EasyDMA event without endpoint clearing.
*
* This handler would be called when EasyDMA transfer for endpoints that does not require clearing.
* All in endpoints are cleared automatically when new EasyDMA transfer is initialized.
* For endpoint 0 see @ref nrf_usbd_ep0out_dma_handler
*
* @param[in] ep Endpoint number
*/
static inline void nrf_usbd_epin_dma_handler(nrf_drv_usbd_ep_t ep)
{
NRF_LOG_DEBUG("USB event: DMA ready IN: %x\r\n", ep);
ASSERT(NRF_USBD_EPIN_CHECK(ep));
ASSERT(!NRF_USBD_EPISO_CHECK(ep));
ASSERT(NRF_USBD_EP_NR_GET(ep) > 0);
m_dma_pending = 0;
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.feeder == NULL)
{
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<ep2bit(ep))));
}
}
/**
* @brief Handler for EasyDMA event from in isochronous endpoint
*
* @todo RK documentation
*/
static inline void nrf_usbd_epiniso_dma_handler(nrf_drv_usbd_ep_t ep)
{
if (NRF_USBD_ISO_DEBUG)
{
NRF_LOG_DEBUG("USB event: DMA ready ISOIN: %x\r\n", ep);
}
ASSERT(NRF_USBD_EPIN_CHECK(ep));
ASSERT(NRF_USBD_EPISO_CHECK(ep));
m_dma_pending = 0;
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.feeder == NULL)
{
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<ep2bit(ep))));
/* Send event to the user - for an ISO IN endpoint, the whole transfer is finished in this moment */
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_OK);
m_event_handler(&evt);
}
}
/**
* @brief Handler for EasyDMA event for OUT endpoint 0.
*
* EP0 OUT have to be cleared automatically in special way - only in the middle of the transfer.
* It cannot be cleared when required transfer is finished because it means the same that accepting the comment.
*/
static inline void nrf_usbd_ep0out_dma_handler(void)
{
const nrf_drv_usbd_ep_t ep = NRF_DRV_USBD_EPOUT0;
NRF_LOG_DEBUG("USB event: DMA ready OUT0\r\n");
m_dma_pending = 0;
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.consumer == NULL)
{
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<ep2bit(ep))));
/* Send event to the user - for an OUT endpoint, the whole transfer is finished in this moment */
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_OK);
m_event_handler(&evt);
return;
}
nrf_drv_usbd_setup_data_clear();
}
/**
* @brief Handler for EasyDMA event from endpoinpoint that requires clearing.
*
* This handler would be called when EasyDMA transfer for OUT endpoint has been finished.
*
* @param[in] ep Endpoint number
*
*/
static inline void nrf_usbd_epout_dma_handler(nrf_drv_usbd_ep_t ep)
{
NRF_LOG_DEBUG("USB drv: DMA ready OUT: %x\r\n", ep);
ASSERT(NRF_USBD_EPOUT_CHECK(ep));
ASSERT(!NRF_USBD_EPISO_CHECK(ep));
ASSERT(NRF_USBD_EP_NR_GET(ep) > 0);
m_dma_pending = 0;
nrf_usbd_epout_clear(ep);
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.consumer == NULL)
{
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<ep2bit(ep))));
/* Send event to the user - for an OUT endpoint, the whole transfer is finished in this moment */
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_OK);
m_event_handler(&evt);
}
#if NRF_DRV_USBD_EARLY_DMA_PROCESS
/* Speed up */
usbd_dmareq_process();
#endif
}
/**
* @brief Handler for EasyDMA event from out isochronous endpoint
*
* @todo RK documentation
*/
static inline void nrf_usbd_epoutiso_dma_handler(nrf_drv_usbd_ep_t ep)
{
if (NRF_USBD_ISO_DEBUG)
{
NRF_LOG_DEBUG("USB drv: DMA ready ISOOUT: %x\r\n", ep);
}
ASSERT(NRF_USBD_EPISO_CHECK(ep));
m_dma_pending = 0;
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (NRF_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.consumer == NULL)
{
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<ep2bit(ep))));
/* Send event to the user - for an OUT endpoint, the whole transfer is finished in this moment */
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_OK);
m_event_handler(&evt);
}
}
static void USBD_ISR_dma_epin0(void) { nrf_usbd_ep0in_dma_handler(); }
static void USBD_ISR_dma_epin1(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN1 ); }
static void USBD_ISR_dma_epin2(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN2 ); }
static void USBD_ISR_dma_epin3(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN3 ); }
static void USBD_ISR_dma_epin4(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN4 ); }
static void USBD_ISR_dma_epin5(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN5 ); }
static void USBD_ISR_dma_epin6(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN6 ); }
static void USBD_ISR_dma_epin7(void) { nrf_usbd_epin_dma_handler(NRF_DRV_USBD_EPIN7 ); }
static void USBD_ISR_dma_epin8(void) { nrf_usbd_epiniso_dma_handler(NRF_DRV_USBD_EPIN8 ); }
static void USBD_ISR_dma_epout0(void) { nrf_usbd_ep0out_dma_handler(); }
static void USBD_ISR_dma_epout1(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT1); }
static void USBD_ISR_dma_epout2(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT2); }
static void USBD_ISR_dma_epout3(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT3); }
static void USBD_ISR_dma_epout4(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT4); }
static void USBD_ISR_dma_epout5(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT5); }
static void USBD_ISR_dma_epout6(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT6); }
static void USBD_ISR_dma_epout7(void) { nrf_usbd_epout_dma_handler(NRF_DRV_USBD_EPOUT7); }
static void USBD_ISR_dma_epout8(void) { nrf_usbd_epoutiso_dma_handler(NRF_DRV_USBD_EPOUT8); }
static void USBD_ISR_Sof(void)
{
nrf_drv_usbd_evt_t evt = {
NRF_DRV_USBD_EVT_SOF,
.data = { .sof = { .framecnt = nrf_usbd_framecntr_get() }}
};
/* Process isochronous endpoints */
m_ep_ready |=
(1U << ep2bit(NRF_DRV_USBD_EPIN8 )) |
(1U << ep2bit(NRF_DRV_USBD_EPOUT8));
m_event_handler(&evt);
}
/**
* @brief React on data transfer finished
*
* Auxiliary internal function.
* @param ep Endpoint number
* @param bitpos Bit position for selected endpoint number
*/
static void usbd_ep_data_handler(nrf_drv_usbd_ep_t ep, uint8_t bitpos)
{
NRF_LOG_DEBUG("USBD event: EndpointData: %x\r\n", ep);
/* Mark endpoint ready for next DMA access */
m_ep_ready |= (1U<<bitpos);
if (NRF_USBD_EPIN_CHECK(ep))
{
/* IN endpoint (Device -> Host) */
if (0 == (m_ep_dma_waiting & (1U<<bitpos)))
{
NRF_LOG_DEBUG("USBD event: EndpointData: In finished\r\n");
/* No more data to be send - transmission finished */
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_OK);
m_event_handler(&evt);
}
}
else
{
/* OUT endpoint (Host -> Device) */
if (0 == (m_ep_dma_waiting & (1U<<bitpos)))
{
NRF_LOG_DEBUG("USBD event: EndpointData: Out waiting\r\n");
/* No buffer prepared - send event to the application */
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_WAITING);
m_event_handler(&evt);
}
}
}
static void USBD_ISR_SetupData(void)
{
usbd_ep_data_handler(m_last_setup_dir, ep2bit(m_last_setup_dir));
}
static void USBD_ISR_Setup(void)
{
nrf_usbd_shorts_disable(NRF_USBD_SHORT_EP0DATADONE_EP0STATUS_MASK);
NRF_LOG_DEBUG("USBD event: Setup (rt:%.2x r:%.2x v:%.4x i:%.4x l:%u )\r\n",
nrf_usbd_setup_bmrequesttype_get(),
nrf_usbd_setup_brequest_get(),
nrf_usbd_setup_wvalue_get(),
nrf_usbd_setup_windex_get(),
nrf_usbd_setup_wlength_get());
uint8_t bmRequestType = nrf_usbd_setup_bmrequesttype_get();
if ((m_ep_dma_waiting | ((~m_ep_ready) & USBD_EPIN_BIT_MASK)) & (1U <<ep2bit(m_last_setup_dir)))
{
NRF_LOG_DEBUG("USBD drv: Trying to abort last transfer on EP0\r\n");
usbd_ep_abort(m_last_setup_dir);
}
m_last_setup_dir =
((bmRequestType & USBD_DRV_REQUESTTYPE_DIR_MASK) == USBD_DRV_REQUESTTYPE_DIR_OUT) ?
NRF_DRV_USBD_EPOUT0 : NRF_DRV_USBD_EPIN0;
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(
&m_ep_dma_waiting,
~((1U<<ep2bit(NRF_DRV_USBD_EPOUT0)) | (1U<<ep2bit(NRF_DRV_USBD_EPIN0)))));
m_ep_ready |= 1U<<ep2bit(NRF_DRV_USBD_EPIN0);
const nrf_drv_usbd_evt_t evt = {
.type = NRF_DRV_USBD_EVT_SETUP
};
m_event_handler(&evt);
}
static void USBD_ISR_Event(void)
{
uint32_t event = nrf_usbd_eventcause_get_and_clear();
if (event & NRF_USBD_EVENTCAUSE_ISOOUTCRC_MASK)
{
/* Currently no support */
}
if (event & NRF_USBD_EVENTCAUSE_SUSPEND_MASK)
{
const nrf_drv_usbd_evt_t evt = {
.type = NRF_DRV_USBD_EVT_SUSPEND
};
m_event_handler(&evt);
}
if (event & NRF_USBD_EVENTCAUSE_RESUME_MASK)
{
const nrf_drv_usbd_evt_t evt = {
.type = NRF_DRV_USBD_EVT_RESUME
};
m_event_handler(&evt);
}
}
static void USBD_ISR_EpDataStatus(void)
{
/* Get all endpoints that have acknowledged transfer */
uint32_t dataepstatus = nrf_usbd_epdatastatus_get_and_clear();
#if NRF_DRV_USBD_PROTO1_FIX
dataepstatus |= (m_simulated_dataepstatus &
~((1U<<USBD_EPOUT_BITPOS_0) | (1U<<USBD_EPIN_BITPOS_0)));
m_simulated_dataepstatus &=
((1U<<USBD_EPOUT_BITPOS_0) | (1U<<USBD_EPIN_BITPOS_0));
#endif
NRF_LOG_DEBUG("USBD event: EndpointEPStatus: %x\r\n", dataepstatus);
/* All finished endpoint have to be marked as busy */
while (dataepstatus)
{
uint8_t bitpos = __CLZ(__RBIT(dataepstatus));
nrf_drv_usbd_ep_t ep = bit2ep(bitpos);
dataepstatus &= ~(1UL << bitpos);
UNUSED_RETURN_VALUE(usbd_ep_data_handler(ep, bitpos));
}
#if NRF_DRV_USBD_EARLY_DMA_PROCESS
/* Speed up */
usbd_dmareq_process();
#endif
}
static void USBD_ISR_AccessFault(void)
{
/** @todo RK Currently do nothing about it.
* Implement it when accessfault would be better documented */
// ASSERT(0);
}
/**
* @brief Function to select the endpoint to start
*
* Function that realizes algorithm to schedule right channel for EasyDMA transfer.
* It gets a variable with flags for the endpoints currently requiring transfer.
*
* @param[in] req Bit flags for channels currently requiring transfer.
* Bits 0...8 used for IN endpoints.
* Bits 16...24 used for OUT endpoints.
* @note
* This function would be never called with 0 as a @c req argument.
* @return The bit number of the endpoint that should be processed now.
*/
static uint8_t usbd_dma_scheduler_algorithm(uint32_t req)
{
/** @todo RK This is just simple algorithm for testing and should be updated */
return __CLZ(__RBIT(req));
}
/**
* @brief Get the size of isochronous endpoint
*
* The size of isochronous endpoint is configurable.
* This function returns the size of isochronous buffer taking into account
* current configuration.
*
* @param[in] ep Endpoint number.
*
* @return The size of endpoint buffer.
*/
static inline size_t usbd_ep_iso_capacity(nrf_drv_usbd_ep_t ep)
{
UNUSED_PARAMETER(ep);
nrf_usbd_isosplit_t split = nrf_usbd_isosplit_get();
if (NRF_USBD_ISOSPLIT_Half == split)
{
return NRF_DRV_USBD_ISOSIZE / 2;
}
return NRF_DRV_USBD_ISOSIZE;
}
/**
* @brief Process all DMA requests
*
* Function that have to be called from USBD interrupt handler.
* It have to be called when all the interrupts connected with endpoints transfer
* and DMA transfer are already handled.
*/
static void usbd_dmareq_process(void)
{
if (0 == m_dma_pending)
{
uint32_t req;
while (0 != (req = m_ep_dma_waiting & m_ep_ready))
{
uint8_t pos = usbd_dma_scheduler_algorithm(req);
nrf_drv_usbd_ep_t ep = bit2ep(pos);
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
nrf_drv_usbd_ep_transfer_t transfer;
bool continue_transfer;
STATIC_ASSERT(offsetof(usbd_drv_ep_state_t, handler.feeder) ==
offsetof(usbd_drv_ep_state_t, handler.consumer));
ASSERT((p_state->handler.feeder) != NULL);
if (NRF_USBD_EPIN_CHECK(ep))
{
/* Device -> Host */
continue_transfer = p_state->handler.feeder(
&transfer,
p_state->p_context,
p_state->max_packet_size);
if (!continue_transfer)
{
p_state->handler.feeder = NULL;
if (ep == NRF_DRV_USBD_EPIN0)
{
/** Configure short right now - now if the last data is transferred,
* when host tries another data transfer, the endpoint will stall. */
NRF_LOG_DEBUG("USB DMA process: Enable status short\r\n");
nrf_usbd_shorts_enable(NRF_USBD_SHORT_EP0DATADONE_EP0STATUS_MASK);
}
}
}
else
{
/* Host -> Device */
const size_t rx_size = nrf_drv_usbd_epout_size_get(ep);
continue_transfer = p_state->handler.consumer(
&transfer,
p_state->p_context,
p_state->max_packet_size,
rx_size);
if (transfer.p_data.rx == NULL)
{
/* Dropping transfer - allow processing */
ASSERT(transfer.size == 0);
}
else if (transfer.size < rx_size)
{
p_state->status = NRF_USBD_EP_OVERLOAD;
UNUSED_RETURN_VALUE(nrf_atomic_u32_and(&m_ep_dma_waiting, ~(1U<<pos)));
NRF_DRV_USBD_EP_TRANSFER_EVENT(evt, ep, NRF_USBD_EP_OVERLOAD);
m_event_handler(&evt);
/* This endpoint will not be transmitted now, repeat the loop */
continue;
}
else
{
/* Nothing to do */
}
if (!continue_transfer)
{
p_state->handler.consumer = NULL;
}
ASSERT(transfer.size == rx_size);
}
m_dma_pending = 1;
m_ep_ready &= ~(1U << pos);
if (NRF_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRF_LOG_DEBUG(
"USB DMA process: Starting transfer on EP: %x, size: %u\r\n",
ep,
transfer.size);
}
/* Update number of currently transferred bytes */
p_state->transfer_cnt += transfer.size;
/* Start transfer to the endpoint buffer */
nrf_usbd_ep_easydma_set(ep, transfer.p_data.ptr, (uint32_t)transfer.size);
#if NRF_DRV_USBD_PROTO1_FIX
uint32_t cnt_end = (uint32_t)(-1);
do
{
uint32_t cnt = (uint32_t)(-1);
do
{
nrf_usbd_event_clear(NRF_USBD_EVENT_STARTED);
usbd_dma_start(ep);
nrf_drv_systick_delay_us(2);
++cnt;
}while (!nrf_usbd_event_check(NRF_USBD_EVENT_STARTED));
if (cnt)
{
NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(" DMA restarted: %u times\r\n", cnt);
}
nrf_drv_systick_delay_us(20);
while (0 == (0x20 & *((volatile uint32_t *)(NRF_USBD_BASE + 0x474))))
{
nrf_drv_systick_delay_us(2);
}
nrf_drv_systick_delay_us(1);
++cnt_end;
} while (!nrf_usbd_event_check(nrf_drv_usbd_ep_to_endevent(ep)));
if (cnt_end)
{
NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(" DMA fully restarted: %u times\r\n", cnt_end);
}
#else
usbd_dma_start(ep);
#endif
if (NRF_USBD_DMAREQ_PROCESS_DEBUG)
{
NRF_LOG_DEBUG("USB DMA process - finishing\r\n");
}
/* Transfer started - exit the loop */
break;
}
}
else
{
if (NRF_USBD_DMAREQ_PROCESS_DEBUG)
{
NRF_LOG_DEBUG("USB DMA process - EasyDMA busy\r\n");
}
}
}
/** @} */
typedef void (*nrf_drv_usbd_isr_t)(void);
/**
* @brief USBD interrupt service runtimes
*
*/
static const nrf_drv_usbd_isr_t m_isr[] =
{
[USBD_INTEN_USBRESET_Pos ] = USBD_ISR_Usbreset,
[USBD_INTEN_STARTED_Pos ] = USBD_ISR_Started,
[USBD_INTEN_ENDEPIN0_Pos ] = USBD_ISR_dma_epin0,
[USBD_INTEN_ENDEPIN1_Pos ] = USBD_ISR_dma_epin1,
[USBD_INTEN_ENDEPIN2_Pos ] = USBD_ISR_dma_epin2,
[USBD_INTEN_ENDEPIN3_Pos ] = USBD_ISR_dma_epin3,
[USBD_INTEN_ENDEPIN4_Pos ] = USBD_ISR_dma_epin4,
[USBD_INTEN_ENDEPIN5_Pos ] = USBD_ISR_dma_epin5,
[USBD_INTEN_ENDEPIN6_Pos ] = USBD_ISR_dma_epin6,
[USBD_INTEN_ENDEPIN7_Pos ] = USBD_ISR_dma_epin7,
[USBD_INTEN_EP0DATADONE_Pos] = USBD_ISR_SetupData,
[USBD_INTEN_ENDISOIN_Pos ] = USBD_ISR_dma_epin8,
[USBD_INTEN_ENDEPOUT0_Pos ] = USBD_ISR_dma_epout0,
[USBD_INTEN_ENDEPOUT1_Pos ] = USBD_ISR_dma_epout1,
[USBD_INTEN_ENDEPOUT2_Pos ] = USBD_ISR_dma_epout2,
[USBD_INTEN_ENDEPOUT3_Pos ] = USBD_ISR_dma_epout3,
[USBD_INTEN_ENDEPOUT4_Pos ] = USBD_ISR_dma_epout4,
[USBD_INTEN_ENDEPOUT5_Pos ] = USBD_ISR_dma_epout5,
[USBD_INTEN_ENDEPOUT6_Pos ] = USBD_ISR_dma_epout6,
[USBD_INTEN_ENDEPOUT7_Pos ] = USBD_ISR_dma_epout7,
[USBD_INTEN_ENDISOOUT_Pos ] = USBD_ISR_dma_epout8,
[USBD_INTEN_SOF_Pos ] = USBD_ISR_Sof,
[USBD_INTEN_USBEVENT_Pos ] = USBD_ISR_Event,
[USBD_INTEN_EP0SETUP_Pos ] = USBD_ISR_Setup,
[USBD_INTEN_EPDATA_Pos ] = USBD_ISR_EpDataStatus,
[USBD_INTEN_ACCESSFAULT_Pos] = USBD_ISR_AccessFault
};
/**
* @name Interrupt handlers
*
* @{
*/
void USBD_IRQHandler(void)
{
const uint32_t enabled = nrf_usbd_int_enable_get();
uint32_t to_process = enabled;
uint32_t active = 0;
/* Check all enabled interrupts */
while (to_process)
{
uint8_t event_nr = __CLZ(__RBIT(to_process));
if (nrf_usbd_event_get_and_clear((nrf_usbd_event_t)nrf_drv_bitpos_to_event(event_nr)))
{
active |= 1UL << event_nr;
}
to_process &= ~(1UL << event_nr);
}
#if NRF_DRV_USBD_PROTO1_FIX
/* Event correcting */
if ((0 == m_dma_pending) && (0 != (active & (USBD_INTEN_SOF_Msk))))
{
uint8_t usbi, uoi, uii;
/* Testing */
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7A9;
uii = (uint8_t)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
if (0 != uii)
{
uii &= (uint8_t)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
}
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AA;
uoi = (uint8_t)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
if (0 != uoi)
{
uoi &= (uint8_t)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
}
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AB;
usbi = (uint8_t)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
if (0 != usbi)
{
usbi &= (uint8_t)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
}
/* Processing */
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AC;
uii &= (uint8_t)*((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
if (0 != uii)
{
uint8_t rb;
m_simulated_dataepstatus |= ((uint32_t)uii)<<USBD_EPIN_BITPOS_0;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7A9;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) = uii;
rb = (uint8_t)*((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
UNUSED_VARIABLE(rb);
NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(" uii: 0x%.2x (0x%.2x)\r\n", uii, rb);
}
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AD;
uoi &= (uint8_t)*((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
if (0 != uoi)
{
uint8_t rb;
m_simulated_dataepstatus |= ((uint32_t)uoi)<<USBD_EPOUT_BITPOS_0;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AA;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) = uoi;
rb = (uint8_t)*((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
UNUSED_VARIABLE(rb);
NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(" uoi: 0x%.2u (0x%.2x)\r\n", uoi, rb);
}
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AE;
usbi &= (uint8_t)*((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
if (0 != usbi)
{
uint8_t rb;
if (usbi & 0x01)
{
active |= USBD_INTEN_EP0SETUP_Msk;
}
if (usbi & 0x10)
{
active |= USBD_INTEN_USBRESET_Msk;
}
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7AB;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) = usbi;
rb = (uint8_t)*((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
UNUSED_VARIABLE(rb);
NRF_DRV_USBD_LOG_PROTO1_FIX_PRINTF(" usbi: 0x%.2u (0x%.2x)\r\n", usbi, rb);
}
if (0 != (m_simulated_dataepstatus &
~((1U<<USBD_EPOUT_BITPOS_0) | (1U<<USBD_EPIN_BITPOS_0))))
{
active |= enabled & NRF_USBD_INT_DATAEP_MASK;
}
if (0 != (m_simulated_dataepstatus &
((1U<<USBD_EPOUT_BITPOS_0) | (1U<<USBD_EPIN_BITPOS_0))))
{
if (0 != (enabled & NRF_USBD_INT_EP0DATADONE_MASK))
{
m_simulated_dataepstatus &=
~((1U<<USBD_EPOUT_BITPOS_0) | (1U<<USBD_EPIN_BITPOS_0));
active |= NRF_USBD_INT_EP0DATADONE_MASK;
}
}
}
#endif
/* Process the active interrupts */
bool setup_active = 0 != (active & NRF_USBD_INT_EP0SETUP_MASK);
active &= ~NRF_USBD_INT_EP0SETUP_MASK;
while (active)
{
uint8_t event_nr = __CLZ(__RBIT(active));
m_isr[event_nr]();
active &= ~(1UL << event_nr);
}
usbd_dmareq_process();
if (setup_active)
{
m_isr[USBD_INTEN_EP0SETUP_Pos]();
}
}
/** @} */
/** @} */
ret_code_t nrf_drv_usbd_init(nrf_drv_usbd_event_handler_t const event_handler)
{
UNUSED_VARIABLE(usbd_ep_iso_capacity);
#if NRF_DRV_USBD_PROTO1_FIX
nrf_drv_systick_init();
#endif
if (NULL == event_handler)
{
return NRF_ERROR_INVALID_PARAM;
}
if ( m_drv_state != NRF_DRV_STATE_UNINITIALIZED)
{
return NRF_ERROR_INVALID_STATE;
}
nrf_drv_clock_hfclk_request(NULL);
while (!nrf_drv_clock_hfclk_is_running())
{
/* Just waiting */
}
m_event_handler = event_handler;
m_drv_state = NRF_DRV_STATE_INITIALIZED;
uint8_t n;
for (n=0; n<NRF_USBD_EPIN_CNT; ++n)
{
nrf_drv_usbd_ep_t ep = NRF_DRV_USBD_EPIN(n);
nrf_drv_usbd_ep_max_packet_size_set(ep, NRF_USBD_EPISO_CHECK(ep) ?
(NRF_DRV_USBD_ISOSIZE / 2) : NRF_DRV_USBD_EPSIZE);
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
p_state->status = NRF_USBD_EP_OK;
p_state->handler.feeder = NULL;
p_state->transfer_cnt = 0;
}
for (n=0; n<NRF_USBD_EPOUT_CNT; ++n)
{
nrf_drv_usbd_ep_t ep = NRF_DRV_USBD_EPOUT(n);
nrf_drv_usbd_ep_max_packet_size_set(ep, NRF_USBD_EPISO_CHECK(ep) ?
(NRF_DRV_USBD_ISOSIZE / 2) : NRF_DRV_USBD_EPSIZE);
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
p_state->status = NRF_USBD_EP_OK;
p_state->handler.consumer = NULL;
p_state->transfer_cnt = 0;
}
return NRF_SUCCESS;
}
ret_code_t nrf_drv_usbd_uninit(void)
{
if (m_drv_state != NRF_DRV_STATE_INITIALIZED)
{
return NRF_ERROR_INVALID_STATE;
}
nrf_drv_clock_hfclk_release();
m_event_handler = NULL;
m_drv_state = NRF_DRV_STATE_UNINITIALIZED;
return NRF_SUCCESS;
}
void nrf_drv_usbd_enable(void)
{
ASSERT(m_drv_state == NRF_DRV_STATE_INITIALIZED);
/* Prepare for READY event receiving */
nrf_usbd_eventcause_clear(NRF_USBD_EVENTCAUSE_READY_MASK);
/* Enable the peripheral */
nrf_usbd_enable();
/* Waiting for peripheral to enable, this should take a few us */
while (0 == (NRF_USBD_EVENTCAUSE_READY_MASK & nrf_usbd_eventcause_get()))
{
/* Empty loop */
}
nrf_usbd_eventcause_clear(NRF_USBD_EVENTCAUSE_READY_MASK);
nrf_usbd_isosplit_set(NRF_USBD_ISOSPLIT_Half);
m_ep_ready = (((1U<<NRF_USBD_EPIN_CNT) - 1U) << USBD_EPIN_BITPOS_0);
m_ep_dma_waiting = 0;
m_dma_pending = 0;
m_last_setup_dir = NRF_DRV_USBD_EPOUT0;
m_drv_state = NRF_DRV_STATE_POWERED_ON;
}
void nrf_drv_usbd_disable(void)
{
ASSERT(m_drv_state != NRF_DRV_STATE_UNINITIALIZED);
/* Stop just in case */
nrf_drv_usbd_stop();
/* Disable all parts */
nrf_usbd_int_disable(nrf_usbd_int_enable_get());
nrf_usbd_disable();
m_dma_pending = 0;
m_drv_state = NRF_DRV_STATE_INITIALIZED;
}
void nrf_drv_usbd_start(bool enable_sof)
{
ASSERT(m_drv_state == NRF_DRV_STATE_POWERED_ON);
uint32_t ints_to_enable =
NRF_USBD_INT_USBRESET_MASK |
NRF_USBD_INT_STARTED_MASK |
NRF_USBD_INT_ENDEPIN0_MASK |
NRF_USBD_INT_EP0DATADONE_MASK |
NRF_USBD_INT_ENDEPOUT0_MASK |
NRF_USBD_INT_USBEVENT_MASK |
NRF_USBD_INT_EP0SETUP_MASK |
NRF_USBD_INT_DATAEP_MASK |
NRF_USBD_INT_ACCESSFAULT_MASK;
if (enable_sof || NRF_DRV_USBD_PROTO1_FIX)
{
ints_to_enable |= NRF_USBD_INT_SOF_MASK;
}
/* Enable all required interrupts */
nrf_usbd_int_enable(ints_to_enable);
/* Enable interrupt globally */
nrf_drv_common_irq_enable(USBD_IRQn, USBD_CONFIG_IRQ_PRIORITY);
/* Enable pullups */
nrf_usbd_pullup_enable();
}
void nrf_drv_usbd_stop(void)
{
ASSERT(m_drv_state == NRF_DRV_STATE_POWERED_ON);
/* Abort transfers */
usbd_ep_abort_all();
/* Disable pullups */
nrf_usbd_pullup_disable();
/* Disable interrupt globally */
nrf_drv_common_irq_disable(USBD_IRQn);
}
bool nrf_drv_usbd_is_initialized(void)
{
return (m_drv_state >= NRF_DRV_STATE_INITIALIZED);
}
bool nrf_drv_usbd_is_enabled(void)
{
return (m_drv_state >= NRF_DRV_STATE_POWERED_ON);
}
bool nrf_drv_usbd_is_started(void)
{
return (nrf_drv_usbd_is_enabled() && nrf_drv_common_irq_enable_check(USBD_IRQn));
}
void nrf_drv_usbd_ep_max_packet_size_set(nrf_drv_usbd_ep_t ep, uint16_t size)
{
/* Only power of 2 size allowed */
ASSERT((size != 0) && (size & (size - 1)) == 0);
/* Packet size cannot be higher than maximum buffer size */
ASSERT( ( NRF_USBD_EPISO_CHECK(ep) && (size <= usbd_ep_iso_capacity(ep)))
||
((!NRF_USBD_EPISO_CHECK(ep)) && (size <= NRF_DRV_USBD_EPSIZE)));
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
p_state->max_packet_size = size;
}
uint16_t nrf_drv_usbd_ep_max_packet_size_get(nrf_drv_usbd_ep_t ep)
{
usbd_drv_ep_state_t const * p_state = ep_state_access(ep);
return p_state->max_packet_size;
}
bool nrf_drv_usbd_ep_enable_check(nrf_drv_usbd_ep_t ep)
{
return nrf_usbd_ep_enable_check(ep_to_hal(ep));
}
void nrf_drv_usbd_ep_enable(nrf_drv_usbd_ep_t ep)
{
nrf_usbd_ep_enable(ep_to_hal(ep));
nrf_usbd_int_enable(nrf_drv_usbd_ep_to_int(ep));
if ((NRF_USBD_EP_NR_GET(ep) != 0) && NRF_USBD_EPOUT_CHECK(ep))
{
CRITICAL_REGION_ENTER();
m_ep_ready |= 1U<<ep2bit(ep);
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
if (!NRF_USBD_EPISO_CHECK(ep))
{
ret_code_t ret;
NRF_DRV_USBD_TRANSFER_OUT(transfer, 0, 0);
ret = nrf_drv_usbd_ep_transfer(ep, &transfer);
ASSERT(ret == NRF_SUCCESS);
UNUSED_VARIABLE(ret);
}
p_state->status = NRF_USBD_EP_ABORTED;
CRITICAL_REGION_EXIT();
}
}
void nrf_drv_usbd_ep_disable(nrf_drv_usbd_ep_t ep)
{
nrf_usbd_ep_disable(ep_to_hal(ep));
nrf_usbd_int_disable(nrf_drv_usbd_ep_to_int(ep));
}
ret_code_t nrf_drv_usbd_ep_transfer(
nrf_drv_usbd_ep_t ep,
nrf_drv_usbd_transfer_t const * const p_transfer)
{
ret_code_t ret;
const uint8_t ep_bitpos = ep2bit(ep);
ASSERT(NULL != p_transfer);
CRITICAL_REGION_ENTER();
/* Setup data transaction can go only in one direction at a time */
if ((NRF_USBD_EP_NR_GET(ep) == 0) && (ep != m_last_setup_dir))
{
ret = NRF_ERROR_INVALID_ADDR;
if (NRF_USBD_FAILED_TRANSFERS_DEBUG)
{
NRF_LOG_DEBUG("USB driver: Transfer failed: Invalid EPr\n");
}
}
else if ((m_ep_dma_waiting | ((~m_ep_ready) & USBD_EPIN_BIT_MASK)) & (1U << ep_bitpos))
{
/* IN (Device -> Host) transfer has to be transmitted out to allow new transmission */
ret = NRF_ERROR_BUSY;
if (NRF_USBD_FAILED_TRANSFERS_DEBUG)
{
NRF_LOG_DEBUG("USB driver: Transfer failed: EP is busy\r\n");\
}
}
else if (nrf_usbd_ep_is_stall(ep))
{
ret = NRF_ERROR_FORBIDDEN;
if (NRF_USBD_FAILED_TRANSFERS_DEBUG)
{
NRF_LOG_DEBUG("USB driver: Transfer failed: EP is stalled\r\n");
}
}
else
{
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
/* Prepare transfer context and handler description */
nrf_drv_usbd_transfer_t * p_context;
if (NRF_USBD_EPIN_CHECK(ep))
{
p_context = m_ep_feeder_state + NRF_USBD_EP_NR_GET(ep);
if (nrf_drv_is_in_RAM(p_transfer->p_data.tx))
{
/* RAM */
if (0 == (p_transfer->flags & NRF_DRV_USBD_TRANSFER_ZLP_FLAG))
{
p_state->handler.feeder = nrf_drv_usbd_feeder_ram;
if (NRF_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRF_LOG_DEBUG(
"USB driver: Transfer called on endpoint %x, size: %u, mode: "
"RAM\r\n",
ep,
p_transfer->size);
}
}
else
{
p_state->handler.feeder = nrf_drv_usbd_feeder_ram_zlp;
if (NRF_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRF_LOG_DEBUG(
"USB driver: Transfer called on endpoint %x, size: %u, mode: "
"RAM_ZLP\r\n",
ep,
p_transfer->size);
}
}
}
else
{
/* Flash */
if (0 == (p_transfer->flags & NRF_DRV_USBD_TRANSFER_ZLP_FLAG))
{
p_state->handler.feeder = nrf_drv_usbd_feeder_flash;
if (NRF_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRF_LOG_DEBUG(
"USB driver: Transfer called on endpoint %x, size: %u, mode: "
"FLASH\r\n",
ep,
p_transfer->size);
}
}
else
{
p_state->handler.feeder = nrf_drv_usbd_feeder_flash_zlp;
if (NRF_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRF_LOG_DEBUG(
"USB driver: Transfer called on endpoint %x, size: %u, mode: "
"FLASH_ZLP\r\n",
ep,
p_transfer->size);
}
}
}
}
else
{
p_context = m_ep_consumer_state + NRF_USBD_EP_NR_GET(ep);
ASSERT((p_transfer->p_data.rx == NULL) || (nrf_drv_is_in_RAM(p_transfer->p_data.rx)));
p_state->handler.consumer = nrf_drv_usbd_consumer;
}
*p_context = *p_transfer;
p_state->p_context = p_context;
p_state->transfer_cnt = 0;
p_state->status = NRF_USBD_EP_OK;
m_ep_dma_waiting |= 1U << ep_bitpos;
ret = NRF_SUCCESS;
usbd_int_rise();
}
CRITICAL_REGION_EXIT();
return ret;
}
ret_code_t nrf_drv_usbd_ep_handled_transfer(
nrf_drv_usbd_ep_t ep,
nrf_drv_usbd_handler_desc_t const * const p_handler)
{
ret_code_t ret;
const uint8_t ep_bitpos = ep2bit(ep);
ASSERT(NULL != p_handler);
CRITICAL_REGION_ENTER();
/* Setup data transaction can go only in one direction at a time */
if ((NRF_USBD_EP_NR_GET(ep) == 0) && (ep != m_last_setup_dir))
{
ret = NRF_ERROR_INVALID_ADDR;
if (NRF_USBD_FAILED_TRANSFERS_DEBUG)
{
NRF_LOG_DEBUG("USB driver: Transfer failed: Invalid EPr\n");
}
}
else if ((m_ep_dma_waiting | ((~m_ep_ready) & USBD_EPIN_BIT_MASK)) & (1U << ep_bitpos))
{
/* IN (Device -> Host) transfer has to be transmitted out to allow a new transmission */
ret = NRF_ERROR_BUSY;
if (NRF_USBD_FAILED_TRANSFERS_DEBUG)
{
NRF_LOG_DEBUG("USB driver: Transfer failed: EP is busy\r\n");\
}
}
else if (nrf_usbd_ep_is_stall(ep))
{
ret = NRF_ERROR_FORBIDDEN;
if (NRF_USBD_FAILED_TRANSFERS_DEBUG)
{
NRF_LOG_DEBUG("USB driver: Transfer failed: EP is stalled\r\n");
}
}
else
{
/* Transfer can be configured now */
usbd_drv_ep_state_t * p_state = ep_state_access(ep);
p_state->transfer_cnt = 0;
p_state->handler = p_handler->handler;
p_state->p_context = p_handler->p_context;
p_state->status = NRF_USBD_EP_OK;
m_ep_dma_waiting |= 1U << ep_bitpos;
ret = NRF_SUCCESS;
if (NRF_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRF_LOG_DEBUG("USB driver: Transfer called on endpoint %x, mode: Handler\r\n", ep);
}
usbd_int_rise();
}
CRITICAL_REGION_EXIT();
return ret;
}
void * nrf_drv_usbd_feeder_buffer_get(void)
{
return m_tx_buffer;
}
ret_code_t nrf_drv_usbd_ep_status_get(nrf_drv_usbd_ep_t ep, size_t * p_size)
{
ret_code_t ret;
usbd_drv_ep_state_t const * p_state = ep_state_access(ep);
CRITICAL_REGION_ENTER();
*p_size = p_state->transfer_cnt;
ret = (p_state->handler.consumer == NULL) ? p_state->status : NRF_ERROR_BUSY;
CRITICAL_REGION_EXIT();
return ret;
}
size_t nrf_drv_usbd_epout_size_get(nrf_drv_usbd_ep_t ep)
{
return nrf_usbd_epout_size_get(ep_to_hal(ep));
}
bool nrf_drv_usbd_ep_is_busy(nrf_drv_usbd_ep_t ep)
{
return (0 != (m_ep_dma_waiting & (1UL << ep2bit(ep))));
}
void nrf_drv_usbd_ep_stall(nrf_drv_usbd_ep_t ep)
{
NRF_LOG_DEBUG("USB: EP %x stalled.\r\n", ep);
nrf_usbd_ep_stall(ep_to_hal(ep));
}
void nrf_drv_usbd_ep_stall_clear(nrf_drv_usbd_ep_t ep)
{
nrf_usbd_ep_unstall(ep_to_hal(ep));
}
bool nrf_drv_usbd_ep_stall_check(nrf_drv_usbd_ep_t ep)
{
return nrf_usbd_ep_is_stall(ep_to_hal(ep));
}
void nrf_drv_usbd_setup_get(nrf_drv_usbd_setup_t * const p_setup)
{
memset(p_setup, 0, sizeof(nrf_drv_usbd_setup_t));
p_setup->bmRequestType = nrf_usbd_setup_bmrequesttype_get();
p_setup->bmRequest = nrf_usbd_setup_brequest_get();
p_setup->wValue = nrf_usbd_setup_wvalue_get();
p_setup->wIndex = nrf_usbd_setup_windex_get();
p_setup->wLength = nrf_usbd_setup_wlength_get();
}
void nrf_drv_usbd_setup_data_clear(void)
{
#if NRF_DRV_USBD_PROTO1_FIX
/* For this fix to work properly, it must be ensured that the task is
* executed twice one after another - blocking ISR. This is however a temporary
* solution to be used only before production typeout. */
uint32_t primask_copy = __get_PRIMASK();
__disable_irq();
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0RCVOUT);
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0RCVOUT);
__set_PRIMASK(primask_copy);
#else
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0RCVOUT);
#endif
}
void nrf_drv_usbd_setup_clear(void)
{
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0STATUS);
}
void nrf_drv_usbd_setup_stall(void)
{
NRF_LOG_DEBUG("Setup stalled.\r\n");
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0STALL);
}
nrf_drv_usbd_ep_t nrf_drv_usbd_last_setup_dir_get(void)
{
return m_last_setup_dir;
}
void nrf_drv_usbd_transfer_out_drop(nrf_drv_usbd_ep_t ep)
{
ASSERT(NRF_USBD_EPOUT_CHECK(ep));
if (m_ep_ready & (1U << ep2bit(ep)))
{
if (!NRF_USBD_EPISO_CHECK(ep))
{
ret_code_t ret;
NRF_DRV_USBD_TRANSFER_OUT(transfer, 0, 0);
ret = nrf_drv_usbd_ep_transfer(ep, &transfer);
ASSERT(ret == NRF_SUCCESS);
UNUSED_VARIABLE(ret);
}
}
}
#endif // USBD_ENABLED