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fuchsia / third_party / openthread / f71d88983e6c083bef8a4c57d36e60d2ed80d60a / . / third_party / NordicSemiconductor / nrfx / drivers / src / nrfx_usbd.c
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/*
* Copyright (c) 2016 - 2019, 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 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 the copyright holder nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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 <nrfx.h>
#if NRFX_CHECK(NRFX_USBD_ENABLED)
#include <nrfx_usbd.h>
#include "nrfx_usbd_errata.h"
#include <nrfx_systick.h> /* Marker to delete when not required anymore: >> NRFX_USBD_ERRATA_ENABLE << */
#include <string.h>
#define NRFX_LOG_MODULE USBD
#include <nrfx_log.h>
#ifndef NRFX_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 NRFX_USBD_EARLY_DMA_PROCESS 1
#endif
#ifndef NRFX_USBD_PROTO1_FIX_DEBUG
/* Debug information when events are fixed*/
#define NRFX_USBD_PROTO1_FIX_DEBUG 1
#endif
#define NRFX_USBD_LOG_PROTO1_FIX_PRINTF(...) \
do{ \
if (NRFX_USBD_PROTO1_FIX_DEBUG){ NRFX_LOG_DEBUG(__VA_ARGS__); }\
} while (0)
#ifndef NRFX_USBD_STARTED_EV_ENABLE
#define NRFX_USBD_STARTED_EV_ENABLE 0
#endif
#ifndef NRFX_USBD_CONFIG_ISO_IN_ZLP
/*
* Respond to an IN token on ISO IN endpoint with ZLP when no data is ready.
* NOTE: This option does not work on Engineering A chip.
*/
#define NRFX_USBD_CONFIG_ISO_IN_ZLP 0
#endif
#ifndef NRFX_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 NRFX_USBD_ISO_DEBUG 1
#endif
#ifndef NRFX_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 NRFX_USBD_FAILED_TRANSFERS_DEBUG 1
#endif
#ifndef NRFX_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 NRFX_USBD_DMAREQ_PROCESS_DEBUG 1
#endif
/**
* @defgroup nrfx_usbd_int USB Device driver internal part
* @internal
* @ingroup nrfx_usbd
*
* 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 NRFX_USBD_ASSERT_EP_VALID(ep) NRFX_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 NRFX_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 NRFX_USBD_EPOUT_BITPOS_0 16
/**
* @brief Input endpoint bits mask.
*/
#define NRFX_USBD_EPIN_BIT_MASK (0xFFFFU << NRFX_USBD_EPIN_BITPOS_0)
/**
* @brief Output endpoint bits mask.
*/
#define NRFX_USBD_EPOUT_BIT_MASK (0xFFFFU << NRFX_USBD_EPOUT_BITPOS_0)
/**
* @brief Isochronous endpoint bit mask
*/
#define USBD_EPISO_BIT_MASK \
((1U << NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT8)) | \
(1U << NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN8)))
/**
* @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 NRFX_USBD_EP_BITPOS(ep) \
((NRF_USBD_EPIN_CHECK(ep) ? NRFX_USBD_EPIN_BITPOS_0 : NRFX_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 NRFX_USBD_EP_TRANSFER_EVENT(name, endpont, ep_stat) \
const nrfx_usbd_evt_t name = { \
NRFX_USBD_EVT_EPTRANSFER, \
.data = { \
.eptransfer = { \
.ep = endpont, \
.status = ep_stat \
} \
} \
}
/* Check it the bit positions values match defined DATAEPSTATUS bit positions */
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN1) == USBD_EPDATASTATUS_EPIN1_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN2) == USBD_EPDATASTATUS_EPIN2_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN3) == USBD_EPDATASTATUS_EPIN3_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN4) == USBD_EPDATASTATUS_EPIN4_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN5) == USBD_EPDATASTATUS_EPIN5_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN6) == USBD_EPDATASTATUS_EPIN6_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPIN7) == USBD_EPDATASTATUS_EPIN7_Pos );
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT1) == USBD_EPDATASTATUS_EPOUT1_Pos);
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT2) == USBD_EPDATASTATUS_EPOUT2_Pos);
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT3) == USBD_EPDATASTATUS_EPOUT3_Pos);
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT4) == USBD_EPDATASTATUS_EPOUT4_Pos);
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT5) == USBD_EPDATASTATUS_EPOUT5_Pos);
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT6) == USBD_EPDATASTATUS_EPOUT6_Pos);
NRFX_STATIC_ASSERT(NRFX_USBD_EP_BITPOS(NRFX_USBD_EPOUT7) == USBD_EPDATASTATUS_EPOUT7_Pos);
/**
* @brief Current driver state.
*/
static nrfx_drv_state_t m_drv_state = NRFX_DRV_STATE_UNINITIALIZED;
/**
* @brief Event handler for the driver.
*
* Event handler that would be called on events.
*
* @note Currently it cannot be null if any interrupt is activated.
*/
static nrfx_usbd_event_handler_t m_event_handler;
/**
* @brief Detected state of the bus.
*
* Internal state changed in interrupts handling when
* RESUME or SUSPEND event is processed.
*
* Values:
* - true - bus suspended
* - false - ongoing normal communication on the bus
*
* @note This is only the bus state and does not mean that the peripheral is in suspend state.
*/
static volatile bool m_bus_suspend;
/**
* @brief Internal constant that contains interrupts disabled in suspend state.
*
* Internal constant used in @ref nrfx_usbd_suspend_irq_config and @ref nrfx_usbd_active_irq_config
* functions.
*/
static const uint32_t m_irq_disabled_in_suspend =
NRF_USBD_INT_ENDEPIN0_MASK |
NRF_USBD_INT_EP0DATADONE_MASK |
NRF_USBD_INT_ENDEPOUT0_MASK |
NRF_USBD_INT_EP0SETUP_MASK |
NRF_USBD_INT_DATAEP_MASK;
/**
* @brief Direction of last received Setup transfer.
*
* This variable is used to redirect internal setup data event
* into selected endpoint (IN or OUT).
*/
static nrfx_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 bool m_dma_pending;
/**
* @brief Simulated data EP status bits required for errata 104.
*
* Marker to delete when not required anymore: >> NRFX_USBD_ERRATA_ENABLE <<.
*/
static uint32_t m_simulated_dataepstatus;
/**
* @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
{
nrfx_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.
nrfx_usbd_ep_status_t status; //!< NRFX_SUCCESS or error code, never NRFX_ERROR_BUSY - this one is calculated.
} usbd_ep_state_t;
/**
* @brief The array of transfer configurations for the endpoints.
*
* The status of the transfer on each endpoint.
*/
static struct
{
usbd_ep_state_t ep_out[NRF_USBD_EPOUT_CNT]; //!< Status for OUT endpoints.
usbd_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.
*/
nrfx_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.
*/
nrfx_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[NRFX_CEIL_DIV(
NRFX_USBD_FEEDER_BUFFER_SIZE, sizeof(uint32_t))];
/* Early declaration. Documentation above definition. */
static void usbd_dmareq_process(void);
/**
* @brief Change endpoint number to endpoint event code.
*
* @param ep Endpoint number.
*
* @return Connected endpoint event code.
*
* Marker to delete when not required anymore: >> NRFX_USBD_ERRATA_ENABLE <<.
*/
static inline nrf_usbd_event_t nrfx_usbd_ep_to_endevent(nrfx_usbd_ep_t ep)
{
NRFX_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)];
}
/**
* @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 nrfx_usbd_ep_to_int(nrfx_usbd_ep_t ep)
{
NRFX_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 nrfx_usbd_consumer_t documentation.
* @param p_context See @ref nrfx_usbd_consumer_t documentation.
* @param ep_size See @ref nrfx_usbd_consumer_t documentation.
* @param data_size See @ref nrfx_usbd_consumer_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrfx_usbd_consumer(
nrfx_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size,
size_t data_size)
{
nrfx_usbd_transfer_t * p_transfer = p_context;
NRFX_ASSERT(ep_size >= data_size);
NRFX_ASSERT((p_transfer->p_data.rx == NULL) ||
nrfx_is_in_ram(p_transfer->p_data.rx));
size_t size = p_transfer->size;
if (size < data_size)
{
NRFX_LOG_DEBUG("consumer: buffer too small: r: %u, l: %u", data_size, 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.addr += data_size;
}
return (ep_size == data_size) && (size != 0);
}
/**
* @brief Integrated feeder from RAM source.
*
* @param[out] p_next See @ref nrfx_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrfx_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrfx_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrfx_usbd_feeder_ram(
nrfx_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size)
{
nrfx_usbd_transfer_t * p_transfer = p_context;
NRFX_ASSERT(nrfx_is_in_ram(p_transfer->p_data.tx));
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.addr += tx_size;
return (p_transfer->size != 0);
}
/**
* @brief Integrated feeder from RAM source with ZLP.
*
* @param[out] p_next See @ref nrfx_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrfx_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrfx_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrfx_usbd_feeder_ram_zlp(
nrfx_usbd_ep_transfer_t * p_next,
void * p_context,
size_t ep_size)
{
nrfx_usbd_transfer_t * p_transfer = p_context;
NRFX_ASSERT(nrfx_is_in_ram(p_transfer->p_data.tx));
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.addr += tx_size;
return (tx_size != 0);
}
/**
* @brief Integrated feeder from a flash source.
*
* @param[out] p_next See @ref nrfx_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrfx_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrfx_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrfx_usbd_feeder_flash(nrfx_usbd_ep_transfer_t * p_next, void * p_context, size_t ep_size)
{
nrfx_usbd_transfer_t * p_transfer = p_context;
NRFX_ASSERT(!nrfx_is_in_ram(p_transfer->p_data.tx));
size_t tx_size = p_transfer->size;
void * p_buffer = nrfx_usbd_feeder_buffer_get();
if (tx_size > ep_size)
{
tx_size = ep_size;
}
NRFX_ASSERT(tx_size <= NRFX_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.addr += tx_size;
return (p_transfer->size != 0);
}
/**
* @brief Integrated feeder from a flash source with ZLP.
*
* @param[out] p_next See @ref nrfx_usbd_feeder_t documentation.
* @param[in,out] p_context See @ref nrfx_usbd_feeder_t documentation.
* @param[in] ep_size See @ref nrfx_usbd_feeder_t documentation.
*
* @retval true Continue transfer.
* @retval false This was the last transfer.
*/
bool nrfx_usbd_feeder_flash_zlp(nrfx_usbd_ep_transfer_t * p_next, void * p_context, size_t ep_size)
{
nrfx_usbd_transfer_t * p_transfer = p_context;
NRFX_ASSERT(!nrfx_is_in_ram(p_transfer->p_data.tx));
size_t tx_size = p_transfer->size;
void * p_buffer = nrfx_usbd_feeder_buffer_get();
if (tx_size > ep_size)
{
tx_size = ep_size;
}
NRFX_ASSERT(tx_size <= NRFX_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.addr += 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 nrfx_usbd_ep_from_hal
*/
static inline uint8_t ep_to_hal(nrfx_usbd_ep_t ep)
{
NRFX_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(nrfx_usbd_ep_t ep)
{
NRFX_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_ep_state_t* ep_state_access(nrfx_usbd_ep_t ep)
{
NRFX_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(nrfx_usbd_ep_t ep)
{
NRFX_USBD_ASSERT_EP_VALID(ep);
return NRFX_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 nrfx_usbd_ep_t bit2ep(uint8_t bitpos)
{
NRFX_STATIC_ASSERT(NRFX_USBD_EPOUT_BITPOS_0 > NRFX_USBD_EPIN_BITPOS_0);
return (nrfx_usbd_ep_t)((bitpos >= NRFX_USBD_EPOUT_BITPOS_0) ?
NRF_USBD_EPOUT(bitpos - NRFX_USBD_EPOUT_BITPOS_0) : NRF_USBD_EPIN(bitpos));
}
/**
* @brief Mark that EasyDMA is working.
*
* Internal function to set the flag informing about EasyDMA transfer pending.
* This function is called always just after the EasyDMA transfer is started.
*/
static inline void usbd_dma_pending_set(void)
{
if (nrfx_usbd_errata_199())
{
*((volatile uint32_t *)0x40027C1C) = 0x00000082;
}
m_dma_pending = true;
}
/**
* @brief Mark that EasyDMA is free.
*
* Internal function to clear the flag informing about EasyDMA transfer pending.
* This function is called always just after the finished EasyDMA transfer is detected.
*/
static inline void usbd_dma_pending_clear(void)
{
if (nrfx_usbd_errata_199())
{
*((volatile uint32_t *)0x40027C1C) = 0x00000000;
}
m_dma_pending = false;
}
/**
* @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(nrfx_usbd_ep_t ep)
{
nrf_usbd_task_trigger(task_start_ep(ep));
}
void nrfx_usbd_isoinconfig_set(nrf_usbd_isoinconfig_t config)
{
nrf_usbd_isoinconfig_set(config);
}
nrf_usbd_isoinconfig_t nrfx_usbd_isoinconfig_get(void)
{
return nrf_usbd_isoinconfig_get();
}
/**
* @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(nrfx_usbd_ep_t ep)
{
NRFX_CRITICAL_SECTION_ENTER();
usbd_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 */
nrfx_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 = NRFX_USBD_EP_ABORTED;
}
else
{
if(!NRF_USBD_EPISO_CHECK(ep))
{
/* Workaround: Disarm the endpoint if there is any data buffered. */
if(ep != NRFX_USBD_EPIN0)
{
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7B6 + (2u * (NRF_USBD_EP_NR_GET(ep) - 1));
uint8_t temp = *((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
temp |= (1U << 1);
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) |= temp;
(void)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
}
else
{
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7B4;
uint8_t temp = *((volatile uint32_t *)(NRF_USBD_BASE + 0x804));
temp |= (1U << 2);
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) |= temp;
(void)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
}
}
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 = NRFX_USBD_EP_ABORTED;
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_ABORTED);
m_event_handler(&evt);
}
}
NRFX_CRITICAL_SECTION_EXIT();
}
void nrfx_usbd_ep_abort(nrfx_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 & NRFX_USBD_EPOUT_BIT_MASK);
while (0 != ep_waiting)
{
uint8_t bitpos = __CLZ(__RBIT(ep_waiting));
if (!NRF_USBD_EPISO_CHECK(bit2ep(bitpos)))
{
usbd_ep_abort(bit2ep(bitpos));
}
ep_waiting &= ~(1U << bitpos);
}
m_ep_ready = (((1U << NRF_USBD_EPIN_CNT) - 1U) << NRFX_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)
{
NRFX_IRQ_PENDING_SET(USBD_IRQn);
}
/**
* @name USBD interrupt runtimes.
*
* Interrupt runtimes that would be vectorized using @ref m_isr.
* @{
*/
static void ev_usbreset_handler(void)
{
m_bus_suspend = false;
m_last_setup_dir = NRFX_USBD_EPOUT0;
const nrfx_usbd_evt_t evt = {
.type = NRFX_USBD_EVT_RESET
};
m_event_handler(&evt);
}
static void ev_started_handler(void)
{
#if NRFX_USBD_STARTED_EV_ENABLE
// Handler not used by the stack.
// May be used for debugging.
#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 nrfx_usbd_ep_t ep = NRFX_USBD_EPIN0;
NRFX_LOG_DEBUG("USB event: DMA ready IN0");
usbd_dma_pending_clear();
usbd_ep_state_t * p_state = ep_state_access(ep);
if (NRFX_USBD_EP_ABORTED == p_state->status)
{
/* Clear transfer information just in case */
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else if (p_state->handler.feeder == NULL)
{
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else
{
/* Nothing to do */
}
}
/**
* @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(nrfx_usbd_ep_t ep)
{
NRFX_LOG_DEBUG("USB event: DMA ready IN: %x", ep);
NRFX_ASSERT(NRF_USBD_EPIN_CHECK(ep));
NRFX_ASSERT(!NRF_USBD_EPISO_CHECK(ep));
NRFX_ASSERT(NRF_USBD_EP_NR_GET(ep) > 0);
usbd_dma_pending_clear();
usbd_ep_state_t * p_state = ep_state_access(ep);
if (NRFX_USBD_EP_ABORTED == p_state->status)
{
/* Clear transfer information just in case */
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else if (p_state->handler.feeder == NULL)
{
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else
{
/* Nothing to do */
}
}
/**
* @brief Handler for EasyDMA event from in isochronous endpoint.
*/
static inline void nrf_usbd_epiniso_dma_handler(nrfx_usbd_ep_t ep)
{
if (NRFX_USBD_ISO_DEBUG)
{
NRFX_LOG_DEBUG("USB event: DMA ready ISOIN: %x", ep);
}
NRFX_ASSERT(NRF_USBD_EPIN_CHECK(ep));
NRFX_ASSERT(NRF_USBD_EPISO_CHECK(ep));
usbd_dma_pending_clear();
usbd_ep_state_t * p_state = ep_state_access(ep);
if (NRFX_USBD_EP_ABORTED == p_state->status)
{
/* Clear transfer information just in case */
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else if (p_state->handler.feeder == NULL)
{
(void)(NRFX_ATOMIC_FETCH_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 */
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_OK);
m_event_handler(&evt);
}
else
{
/* Nothing to do */
}
}
/**
* @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 nrfx_usbd_ep_t ep = NRFX_USBD_EPOUT0;
NRFX_LOG_DEBUG("USB event: DMA ready OUT0");
usbd_dma_pending_clear();
usbd_ep_state_t * p_state = ep_state_access(ep);
if (NRFX_USBD_EP_ABORTED == p_state->status)
{
/* Clear transfer information just in case */
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else if (p_state->handler.consumer == NULL)
{
(void)(NRFX_ATOMIC_FETCH_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 */
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_OK);
m_event_handler(&evt);
}
else
{
nrfx_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(nrfx_usbd_ep_t ep)
{
NRFX_LOG_DEBUG("DMA ready OUT: %x", ep);
NRFX_ASSERT(NRF_USBD_EPOUT_CHECK(ep));
NRFX_ASSERT(!NRF_USBD_EPISO_CHECK(ep));
NRFX_ASSERT(NRF_USBD_EP_NR_GET(ep) > 0);
usbd_dma_pending_clear();
usbd_ep_state_t * p_state = ep_state_access(ep);
if (NRFX_USBD_EP_ABORTED == p_state->status)
{
/* Clear transfer information just in case */
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << ep2bit(ep))));
}
else if (p_state->handler.consumer == NULL)
{
(void)(NRFX_ATOMIC_FETCH_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 */
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_OK);
m_event_handler(&evt);
}
else
{
/* Nothing to do */
}
#if NRFX_USBD_EARLY_DMA_PROCESS
/* Speed up */
usbd_dmareq_process();
#endif
}
/**
* @brief Handler for EasyDMA event from out isochronous endpoint.
*/
static inline void nrf_usbd_epoutiso_dma_handler(nrfx_usbd_ep_t ep)
{
if (NRFX_USBD_ISO_DEBUG)
{
NRFX_LOG_DEBUG("DMA ready ISOOUT: %x", ep);
}
NRFX_ASSERT(NRF_USBD_EPISO_CHECK(ep));
usbd_dma_pending_clear();
usbd_ep_state_t * p_state = ep_state_access(ep);
if (NRFX_USBD_EP_ABORTED == p_state->status)
{
/* Nothing to do - just ignore */
}
else if (p_state->handler.consumer == NULL)
{
(void)(NRFX_ATOMIC_FETCH_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 */
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_OK);
m_event_handler(&evt);
}
else
{
/* Nothing to do */
}
}
static void ev_dma_epin0_handler(void) { nrf_usbd_ep0in_dma_handler(); }
static void ev_dma_epin1_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN1 ); }
static void ev_dma_epin2_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN2 ); }
static void ev_dma_epin3_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN3 ); }
static void ev_dma_epin4_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN4 ); }
static void ev_dma_epin5_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN5 ); }
static void ev_dma_epin6_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN6 ); }
static void ev_dma_epin7_handler(void) { nrf_usbd_epin_dma_handler(NRFX_USBD_EPIN7 ); }
static void ev_dma_epin8_handler(void) { nrf_usbd_epiniso_dma_handler(NRFX_USBD_EPIN8 ); }
static void ev_dma_epout0_handler(void) { nrf_usbd_ep0out_dma_handler(); }
static void ev_dma_epout1_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT1); }
static void ev_dma_epout2_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT2); }
static void ev_dma_epout3_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT3); }
static void ev_dma_epout4_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT4); }
static void ev_dma_epout5_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT5); }
static void ev_dma_epout6_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT6); }
static void ev_dma_epout7_handler(void) { nrf_usbd_epout_dma_handler(NRFX_USBD_EPOUT7); }
static void ev_dma_epout8_handler(void) { nrf_usbd_epoutiso_dma_handler(NRFX_USBD_EPOUT8); }
static void ev_sof_handler(void)
{
nrfx_usbd_evt_t evt = {
NRFX_USBD_EVT_SOF,
.data = { .sof = { .framecnt = nrf_usbd_framecntr_get() }}
};
/* Process isochronous endpoints */
uint32_t iso_ready_mask = (1U << ep2bit(NRFX_USBD_EPIN8));
if (nrf_usbd_episoout_size_get(NRFX_USBD_EPOUT8) != NRF_USBD_EPISOOUT_NO_DATA)
{
iso_ready_mask |= (1U << ep2bit(NRFX_USBD_EPOUT8));
}
m_ep_ready |= iso_ready_mask;
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(nrfx_usbd_ep_t ep, uint8_t bitpos)
{
NRFX_LOG_DEBUG("USBD event: EndpointData: %x", 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)))
{
NRFX_LOG_DEBUG("USBD event: EndpointData: In finished");
/* No more data to be send - transmission finished */
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_OK);
m_event_handler(&evt);
}
}
else
{
/* OUT endpoint (Host -> Device) */
if (0 == (m_ep_dma_waiting & (1U << bitpos)))
{
NRFX_LOG_DEBUG("USBD event: EndpointData: Out waiting");
/* No buffer prepared - send event to the application */
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_WAITING);
m_event_handler(&evt);
}
}
}
static void ev_setup_data_handler(void)
{
usbd_ep_data_handler(m_last_setup_dir, ep2bit(m_last_setup_dir));
}
static void ev_setup_handler(void)
{
NRFX_LOG_DEBUG("USBD event: Setup (rt:%.2x r:%.2x v:%.4x i:%.4x l:%u )",
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) & NRFX_USBD_EPIN_BIT_MASK))
& (1U <<ep2bit(m_last_setup_dir)))
{
NRFX_LOG_DEBUG("USBD drv: Trying to abort last transfer on EP0");
usbd_ep_abort(m_last_setup_dir);
}
m_last_setup_dir =
((bmRequestType & USBD_BMREQUESTTYPE_DIRECTION_Msk) ==
(USBD_BMREQUESTTYPE_DIRECTION_HostToDevice << USBD_BMREQUESTTYPE_DIRECTION_Pos)) ?
NRFX_USBD_EPOUT0 : NRFX_USBD_EPIN0;
(void)(NRFX_ATOMIC_FETCH_AND(
&m_ep_dma_waiting,
~((1U << ep2bit(NRFX_USBD_EPOUT0)) | (1U << ep2bit(NRFX_USBD_EPIN0)))));
m_ep_ready |= 1U << ep2bit(NRFX_USBD_EPIN0);
const nrfx_usbd_evt_t evt = {
.type = NRFX_USBD_EVT_SETUP
};
m_event_handler(&evt);
}
static void ev_usbevent_handler(void)
{
uint32_t event = nrf_usbd_eventcause_get_and_clear();
if (event & NRF_USBD_EVENTCAUSE_ISOOUTCRC_MASK)
{
NRFX_LOG_DEBUG("USBD event: ISOOUTCRC");
/* Currently no support */
}
if (event & NRF_USBD_EVENTCAUSE_SUSPEND_MASK)
{
NRFX_LOG_DEBUG("USBD event: SUSPEND");
m_bus_suspend = true;
const nrfx_usbd_evt_t evt = {
.type = NRFX_USBD_EVT_SUSPEND
};
m_event_handler(&evt);
}
if (event & NRF_USBD_EVENTCAUSE_RESUME_MASK)
{
NRFX_LOG_DEBUG("USBD event: RESUME");
m_bus_suspend = false;
const nrfx_usbd_evt_t evt = {
.type = NRFX_USBD_EVT_RESUME
};
m_event_handler(&evt);
}
if (event & NRF_USBD_EVENTCAUSE_WUREQ_MASK)
{
NRFX_LOG_DEBUG("USBD event: WUREQ (%s)", m_bus_suspend ? "In Suspend" : "Active");
if (m_bus_suspend)
{
NRFX_ASSERT(!nrf_usbd_lowpower_check());
m_bus_suspend = false;
nrf_usbd_dpdmvalue_set(NRF_USBD_DPDMVALUE_RESUME);
nrf_usbd_task_trigger(NRF_USBD_TASK_DRIVEDPDM);
const nrfx_usbd_evt_t evt = {
.type = NRFX_USBD_EVT_WUREQ
};
m_event_handler(&evt);
}
}
}
static void ev_epdata_handler(void)
{
/* Get all endpoints that have acknowledged transfer */
uint32_t dataepstatus = nrf_usbd_epdatastatus_get_and_clear();
if (nrfx_usbd_errata_104())
{
dataepstatus |= (m_simulated_dataepstatus &
~((1U << NRFX_USBD_EPOUT_BITPOS_0) | (1U << NRFX_USBD_EPIN_BITPOS_0)));
m_simulated_dataepstatus &=
((1U << NRFX_USBD_EPOUT_BITPOS_0) | (1U << NRFX_USBD_EPIN_BITPOS_0));
}
NRFX_LOG_DEBUG("USBD event: EndpointEPStatus: %x", dataepstatus);
/* All finished endpoint have to be marked as busy */
while (dataepstatus)
{
uint8_t bitpos = __CLZ(__RBIT(dataepstatus));
nrfx_usbd_ep_t ep = bit2ep(bitpos);
dataepstatus &= ~(1UL << bitpos);
(void)(usbd_ep_data_handler(ep, bitpos));
}
if (NRFX_USBD_EARLY_DMA_PROCESS)
{
/* Speed up */
usbd_dmareq_process();
}
}
/**
* @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)
{
/* Only prioritized scheduling mode is supported. */
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(nrfx_usbd_ep_t ep)
{
(void)ep;
nrf_usbd_isosplit_t split = nrf_usbd_isosplit_get();
if (NRF_USBD_ISOSPLIT_HALF == split)
{
return NRFX_USBD_ISOSIZE / 2;
}
return NRFX_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 (!m_dma_pending)
{
uint32_t req;
while (0 != (req = m_ep_dma_waiting & m_ep_ready))
{
uint8_t pos;
if (NRFX_USBD_CONFIG_DMASCHEDULER_ISO_BOOST && ((req & USBD_EPISO_BIT_MASK) != 0))
{
pos = usbd_dma_scheduler_algorithm(req & USBD_EPISO_BIT_MASK);
}
else
{
pos = usbd_dma_scheduler_algorithm(req);
}
nrfx_usbd_ep_t ep = bit2ep(pos);
usbd_ep_state_t * p_state = ep_state_access(ep);
nrfx_usbd_ep_transfer_t transfer;
bool continue_transfer;
NRFX_STATIC_ASSERT(offsetof(usbd_ep_state_t, handler.feeder) ==
offsetof(usbd_ep_state_t, handler.consumer));
NRFX_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;
}
}
else
{
/* Host -> Device */
const size_t rx_size = nrfx_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 */
NRFX_ASSERT(transfer.size == 0);
}
else if (transfer.size < rx_size)
{
NRFX_LOG_DEBUG("Endpoint %x overload (r: %u, e: %u)", ep, rx_size, transfer.size);
p_state->status = NRFX_USBD_EP_OVERLOAD;
(void)(NRFX_ATOMIC_FETCH_AND(&m_ep_dma_waiting, ~(1U << pos)));
NRFX_USBD_EP_TRANSFER_EVENT(evt, ep, NRFX_USBD_EP_OVERLOAD);
m_event_handler(&evt);
/* This endpoint will not be transmitted now, repeat the loop */
continue;
}
else
{
/* Nothing to do - only check integrity if assertions are enabled */
NRFX_ASSERT(transfer.size == rx_size);
}
if (!continue_transfer)
{
p_state->handler.consumer = NULL;
}
}
usbd_dma_pending_set();
m_ep_ready &= ~(1U << pos);
if (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRFX_LOG_DEBUG(
"USB DMA process: Starting transfer on EP: %x, size: %u",
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.addr, (uint32_t)transfer.size);
if (nrfx_usbd_errata_104())
{
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);
nrfx_systick_delay_us(2);
++cnt;
}while (!nrf_usbd_event_check(NRF_USBD_EVENT_STARTED));
if (cnt)
{
NRFX_USBD_LOG_PROTO1_FIX_PRINTF(" DMA restarted: %u times", cnt);
}
nrfx_systick_delay_us(30);
while (0 == (0x20 & *((volatile uint32_t *)(NRF_USBD_BASE + 0x474))))
{
nrfx_systick_delay_us(2);
}
nrfx_systick_delay_us(1);
++cnt_end;
} while (!nrf_usbd_event_check(nrfx_usbd_ep_to_endevent(ep)));
if (cnt_end)
{
NRFX_USBD_LOG_PROTO1_FIX_PRINTF(" DMA fully restarted: %u times", cnt_end);
}
}
else
{
usbd_dma_start(ep);
/* There is a lot of USBD registers that cannot be accessed during EasyDMA transfer.
* This is quick fix to maintain stability of the stack.
* It cost some performance but makes stack stable. */
while (!nrf_usbd_event_check(nrfx_usbd_ep_to_endevent(ep)))
{
/* Empty */
}
}
if (NRFX_USBD_DMAREQ_PROCESS_DEBUG)
{
NRFX_LOG_DEBUG("USB DMA process - finishing");
}
/* Transfer started - exit the loop */
break;
}
}
else
{
if (NRFX_USBD_DMAREQ_PROCESS_DEBUG)
{
NRFX_LOG_DEBUG("USB DMA process - EasyDMA busy");
}
}
}
/** @} */
/**
* @brief USBD interrupt service routines.
*
*/
static const nrfx_irq_handler_t m_isr[] =
{
[USBD_INTEN_USBRESET_Pos ] = ev_usbreset_handler,
[USBD_INTEN_STARTED_Pos ] = ev_started_handler,
[USBD_INTEN_ENDEPIN0_Pos ] = ev_dma_epin0_handler,
[USBD_INTEN_ENDEPIN1_Pos ] = ev_dma_epin1_handler,
[USBD_INTEN_ENDEPIN2_Pos ] = ev_dma_epin2_handler,
[USBD_INTEN_ENDEPIN3_Pos ] = ev_dma_epin3_handler,
[USBD_INTEN_ENDEPIN4_Pos ] = ev_dma_epin4_handler,
[USBD_INTEN_ENDEPIN5_Pos ] = ev_dma_epin5_handler,
[USBD_INTEN_ENDEPIN6_Pos ] = ev_dma_epin6_handler,
[USBD_INTEN_ENDEPIN7_Pos ] = ev_dma_epin7_handler,
[USBD_INTEN_EP0DATADONE_Pos] = ev_setup_data_handler,
[USBD_INTEN_ENDISOIN_Pos ] = ev_dma_epin8_handler,
[USBD_INTEN_ENDEPOUT0_Pos ] = ev_dma_epout0_handler,
[USBD_INTEN_ENDEPOUT1_Pos ] = ev_dma_epout1_handler,
[USBD_INTEN_ENDEPOUT2_Pos ] = ev_dma_epout2_handler,
[USBD_INTEN_ENDEPOUT3_Pos ] = ev_dma_epout3_handler,
[USBD_INTEN_ENDEPOUT4_Pos ] = ev_dma_epout4_handler,
[USBD_INTEN_ENDEPOUT5_Pos ] = ev_dma_epout5_handler,
[USBD_INTEN_ENDEPOUT6_Pos ] = ev_dma_epout6_handler,
[USBD_INTEN_ENDEPOUT7_Pos ] = ev_dma_epout7_handler,
[USBD_INTEN_ENDISOOUT_Pos ] = ev_dma_epout8_handler,
[USBD_INTEN_SOF_Pos ] = ev_sof_handler,
[USBD_INTEN_USBEVENT_Pos ] = ev_usbevent_handler,
[USBD_INTEN_EP0SETUP_Pos ] = ev_setup_handler,
[USBD_INTEN_EPDATA_Pos ] = ev_epdata_handler
};
/**
* @name Interrupt handlers
*
* @{
*/
void nrfx_usbd_irq_handler(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)nrfx_bitpos_to_event(event_nr)))
{
active |= 1UL << event_nr;
}
to_process &= ~(1UL << event_nr);
}
if (nrfx_usbd_errata_104())
{
/* Event correcting */
if ((!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) << NRFX_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));
NRFX_USBD_LOG_PROTO1_FIX_PRINTF(" uii: 0x%.2x (0x%.2x)", uii, rb);
(void)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) << NRFX_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));
NRFX_USBD_LOG_PROTO1_FIX_PRINTF(" uoi: 0x%.2u (0x%.2x)", uoi, rb);
(void)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));
NRFX_USBD_LOG_PROTO1_FIX_PRINTF(" usbi: 0x%.2u (0x%.2x)", usbi, rb);
(void)rb;
}
if (0 != (m_simulated_dataepstatus &
~((1U << NRFX_USBD_EPOUT_BITPOS_0) | (1U << NRFX_USBD_EPIN_BITPOS_0))))
{
active |= enabled & NRF_USBD_INT_DATAEP_MASK;
}
if (0 != (m_simulated_dataepstatus &
((1U << NRFX_USBD_EPOUT_BITPOS_0) | (1U << NRFX_USBD_EPIN_BITPOS_0))))
{
if (0 != (enabled & NRF_USBD_INT_EP0DATADONE_MASK))
{
m_simulated_dataepstatus &=
~((1U << NRFX_USBD_EPOUT_BITPOS_0) | (1U << NRFX_USBD_EPIN_BITPOS_0));
active |= NRF_USBD_INT_EP0DATADONE_MASK;
}
}
}
}
/* 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]();
}
}
/** @} */
/** @} */
nrfx_err_t nrfx_usbd_init(nrfx_usbd_event_handler_t event_handler)
{
NRFX_ASSERT(event_handler);
if (m_drv_state != NRFX_DRV_STATE_UNINITIALIZED)
{
return NRFX_ERROR_INVALID_STATE;
}
m_event_handler = event_handler;
m_drv_state = NRFX_DRV_STATE_INITIALIZED;
uint8_t n;
for (n = 0; n < NRF_USBD_EPIN_CNT; ++n)
{
nrfx_usbd_ep_t ep = NRFX_USBD_EPIN(n);
nrfx_usbd_ep_max_packet_size_set(ep, NRF_USBD_EPISO_CHECK(ep) ?
(NRFX_USBD_ISOSIZE / 2) : NRFX_USBD_EPSIZE);
usbd_ep_state_t * p_state = ep_state_access(ep);
p_state->status = NRFX_USBD_EP_OK;
p_state->handler.feeder = NULL;
p_state->transfer_cnt = 0;
}
for (n = 0; n < NRF_USBD_EPOUT_CNT; ++n)
{
nrfx_usbd_ep_t ep = NRFX_USBD_EPOUT(n);
nrfx_usbd_ep_max_packet_size_set(ep, NRF_USBD_EPISO_CHECK(ep) ?
(NRFX_USBD_ISOSIZE / 2) : NRFX_USBD_EPSIZE);
usbd_ep_state_t * p_state = ep_state_access(ep);
p_state->status = NRFX_USBD_EP_OK;
p_state->handler.consumer = NULL;
p_state->transfer_cnt = 0;
}
return NRFX_SUCCESS;
}
void nrfx_usbd_uninit(void)
{
NRFX_ASSERT(m_drv_state == NRFX_DRV_STATE_INITIALIZED);
m_event_handler = NULL;
m_drv_state = NRFX_DRV_STATE_UNINITIALIZED;
return;
}
void nrfx_usbd_enable(void)
{
NRFX_ASSERT(m_drv_state == NRFX_DRV_STATE_INITIALIZED);
/* Prepare for READY event receiving */
nrf_usbd_eventcause_clear(NRF_USBD_EVENTCAUSE_READY_MASK);
if (nrfx_usbd_errata_187())
{
NRFX_CRITICAL_SECTION_ENTER();
if (*((volatile uint32_t *)(0x4006EC00)) == 0x00000000)
{
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
*((volatile uint32_t *)(0x4006ED14)) = 0x00000003;
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
}
else
{
*((volatile uint32_t *)(0x4006ED14)) = 0x00000003;
}
NRFX_CRITICAL_SECTION_EXIT();
}
if (nrfx_usbd_errata_171())
{
NRFX_CRITICAL_SECTION_ENTER();
if (*((volatile uint32_t *)(0x4006EC00)) == 0x00000000)
{
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
*((volatile uint32_t *)(0x4006EC14)) = 0x000000C0;
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
}
else
{
*((volatile uint32_t *)(0x4006EC14)) = 0x000000C0;
}
NRFX_CRITICAL_SECTION_EXIT();
}
/* 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);
if (nrfx_usbd_errata_171())
{
NRFX_CRITICAL_SECTION_ENTER();
if (*((volatile uint32_t *)(0x4006EC00)) == 0x00000000)
{
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
*((volatile uint32_t *)(0x4006EC14)) = 0x00000000;
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
}
else
{
*((volatile uint32_t *)(0x4006EC14)) = 0x00000000;
}
NRFX_CRITICAL_SECTION_EXIT();
}
if (nrfx_usbd_errata_166())
{
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7E3;
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) = 0x40;
__ISB();
__DSB();
}
nrf_usbd_isosplit_set(NRF_USBD_ISOSPLIT_HALF);
if (NRFX_USBD_CONFIG_ISO_IN_ZLP)
{
nrfx_usbd_isoinconfig_set(NRF_USBD_ISOINCONFIG_ZERODATA);
}
else
{
nrfx_usbd_isoinconfig_set(NRF_USBD_ISOINCONFIG_NORESP);
}
m_ep_ready = (((1U << NRF_USBD_EPIN_CNT) - 1U) << NRFX_USBD_EPIN_BITPOS_0);
m_ep_dma_waiting = 0;
usbd_dma_pending_clear();
m_last_setup_dir = NRFX_USBD_EPOUT0;
m_drv_state = NRFX_DRV_STATE_POWERED_ON;
if (nrfx_usbd_errata_187())
{
NRFX_CRITICAL_SECTION_ENTER();
if (*((volatile uint32_t *)(0x4006EC00)) == 0x00000000)
{
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
*((volatile uint32_t *)(0x4006ED14)) = 0x00000000;
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
}
else
{
*((volatile uint32_t *)(0x4006ED14)) = 0x00000000;
}
NRFX_CRITICAL_SECTION_EXIT();
}
}
void nrfx_usbd_disable(void)
{
NRFX_ASSERT(m_drv_state != NRFX_DRV_STATE_UNINITIALIZED);
/* Stop just in case */
nrfx_usbd_stop();
/* Disable all parts */
nrf_usbd_int_disable(nrf_usbd_int_enable_get());
nrf_usbd_disable();
usbd_dma_pending_clear();
m_drv_state = NRFX_DRV_STATE_INITIALIZED;
}
void nrfx_usbd_start(bool enable_sof)
{
NRFX_ASSERT(m_drv_state == NRFX_DRV_STATE_POWERED_ON);
m_bus_suspend = false;
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;
if (enable_sof || nrfx_usbd_errata_104())
{
ints_to_enable |= NRF_USBD_INT_SOF_MASK;
}
/* Enable all required interrupts */
nrf_usbd_int_enable(ints_to_enable);
/* Enable interrupt globally */
NRFX_IRQ_PRIORITY_SET(USBD_IRQn, NRFX_USBD_CONFIG_IRQ_PRIORITY);
NRFX_IRQ_ENABLE(USBD_IRQn);
/* Enable pullups */
nrf_usbd_pullup_enable();
}
void nrfx_usbd_stop(void)
{
NRFX_ASSERT(m_drv_state == NRFX_DRV_STATE_POWERED_ON);
/* Clear interrupt */
NRFX_IRQ_PENDING_CLEAR(USBD_IRQn);
if (NRFX_IRQ_IS_ENABLED(USBD_IRQn))
{
/* Abort transfers */
usbd_ep_abort_all();
/* Disable pullups */
nrf_usbd_pullup_disable();
/* Disable interrupt globally */
NRFX_IRQ_DISABLE(USBD_IRQn);
/* Disable all interrupts */
nrf_usbd_int_disable(~0U);
}
}
bool nrfx_usbd_is_initialized(void)
{
return (m_drv_state >= NRFX_DRV_STATE_INITIALIZED);
}
bool nrfx_usbd_is_enabled(void)
{
return (m_drv_state >= NRFX_DRV_STATE_POWERED_ON);
}
bool nrfx_usbd_is_started(void)
{
return (nrfx_usbd_is_enabled() && NRFX_IRQ_IS_ENABLED(USBD_IRQn));
}
bool nrfx_usbd_suspend(void)
{
bool suspended = false;
NRFX_CRITICAL_SECTION_ENTER();
if (m_bus_suspend)
{
usbd_ep_abort_all();
if (!(nrf_usbd_eventcause_get() & NRF_USBD_EVENTCAUSE_RESUME_MASK))
{
nrf_usbd_lowpower_enable();
if (nrf_usbd_eventcause_get() & NRF_USBD_EVENTCAUSE_RESUME_MASK)
{
nrf_usbd_lowpower_disable();
}
else
{
suspended = true;
}
}
}
NRFX_CRITICAL_SECTION_EXIT();
return suspended;
}
bool nrfx_usbd_wakeup_req(void)
{
bool started = false;
NRFX_CRITICAL_SECTION_ENTER();
if (m_bus_suspend && nrf_usbd_lowpower_check())
{
nrf_usbd_lowpower_disable();
started = true;
if (nrfx_usbd_errata_171())
{
if (*((volatile uint32_t *)(0x4006EC00)) == 0x00000000)
{
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
*((volatile uint32_t *)(0x4006EC14)) = 0x000000C0;
*((volatile uint32_t *)(0x4006EC00)) = 0x00009375;
}
else
{
*((volatile uint32_t *)(0x4006EC14)) = 0x000000C0;
}
}
}
NRFX_CRITICAL_SECTION_EXIT();
return started;
}
bool nrfx_usbd_suspend_check(void)
{
return nrf_usbd_lowpower_check();
}
void nrfx_usbd_suspend_irq_config(void)
{
nrf_usbd_int_disable(m_irq_disabled_in_suspend);
}
void nrfx_usbd_active_irq_config(void)
{
nrf_usbd_int_enable(m_irq_disabled_in_suspend);
}
bool nrfx_usbd_bus_suspend_check(void)
{
return m_bus_suspend;
}
void nrfx_usbd_force_bus_wakeup(void)
{
m_bus_suspend = false;
}
void nrfx_usbd_ep_max_packet_size_set(nrfx_usbd_ep_t ep, uint16_t size)
{
/* Only power of 2 size allowed */
NRFX_ASSERT((size != 0) && (size & (size - 1)) == 0);
/* Packet size cannot be higher than maximum buffer size */
NRFX_ASSERT((NRF_USBD_EPISO_CHECK(ep) && (size <= usbd_ep_iso_capacity(ep))) ||
(!NRF_USBD_EPISO_CHECK(ep) && (size <= NRFX_USBD_EPSIZE)));
usbd_ep_state_t * p_state = ep_state_access(ep);
p_state->max_packet_size = size;
}
uint16_t nrfx_usbd_ep_max_packet_size_get(nrfx_usbd_ep_t ep)
{
usbd_ep_state_t const * p_state = ep_state_access(ep);
return p_state->max_packet_size;
}
bool nrfx_usbd_ep_enable_check(nrfx_usbd_ep_t ep)
{
return nrf_usbd_ep_enable_check(ep_to_hal(ep));
}
void nrfx_usbd_ep_enable(nrfx_usbd_ep_t ep)
{
nrf_usbd_int_enable(nrfx_usbd_ep_to_int(ep));
if (nrf_usbd_ep_enable_check(ep))
{
return;
}
nrf_usbd_ep_enable(ep_to_hal(ep));
if ((NRF_USBD_EP_NR_GET(ep) != 0) &&
NRF_USBD_EPOUT_CHECK(ep) &&
!NRF_USBD_EPISO_CHECK(ep))
{
NRFX_CRITICAL_SECTION_ENTER();
nrfx_usbd_transfer_out_drop(ep);
m_ep_dma_waiting &= ~(1U << ep2bit(ep));
NRFX_CRITICAL_SECTION_EXIT();
}
}
void nrfx_usbd_ep_disable(nrfx_usbd_ep_t ep)
{
usbd_ep_abort(ep);
nrf_usbd_ep_disable(ep_to_hal(ep));
nrf_usbd_int_disable(nrfx_usbd_ep_to_int(ep));
}
void nrfx_usbd_ep_default_config(void)
{
nrf_usbd_int_disable(
NRF_USBD_INT_ENDEPIN1_MASK |
NRF_USBD_INT_ENDEPIN2_MASK |
NRF_USBD_INT_ENDEPIN3_MASK |
NRF_USBD_INT_ENDEPIN4_MASK |
NRF_USBD_INT_ENDEPIN5_MASK |
NRF_USBD_INT_ENDEPIN6_MASK |
NRF_USBD_INT_ENDEPIN7_MASK |
NRF_USBD_INT_ENDISOIN0_MASK |
NRF_USBD_INT_ENDEPOUT1_MASK |
NRF_USBD_INT_ENDEPOUT2_MASK |
NRF_USBD_INT_ENDEPOUT3_MASK |
NRF_USBD_INT_ENDEPOUT4_MASK |
NRF_USBD_INT_ENDEPOUT5_MASK |
NRF_USBD_INT_ENDEPOUT6_MASK |
NRF_USBD_INT_ENDEPOUT7_MASK |
NRF_USBD_INT_ENDISOOUT0_MASK
);
nrf_usbd_int_enable(NRF_USBD_INT_ENDEPIN0_MASK | NRF_USBD_INT_ENDEPOUT0_MASK);
nrf_usbd_ep_all_disable();
}
nrfx_err_t nrfx_usbd_ep_transfer(
nrfx_usbd_ep_t ep,
nrfx_usbd_transfer_t const * p_transfer)
{
nrfx_err_t ret;
const uint8_t ep_bitpos = ep2bit(ep);
NRFX_ASSERT(NULL != p_transfer);
NRFX_CRITICAL_SECTION_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 = NRFX_ERROR_INVALID_ADDR;
if (NRFX_USBD_FAILED_TRANSFERS_DEBUG &&
(NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep))))
{
NRFX_LOG_DEBUG("Transfer failed: Invalid EPr\n");
}
}
else if ((m_ep_dma_waiting | ((~m_ep_ready) & NRFX_USBD_EPIN_BIT_MASK)) & (1U << ep_bitpos))
{
/* IN (Device -> Host) transfer has to be transmitted out to allow new transmission */
ret = NRFX_ERROR_BUSY;
if (NRFX_USBD_FAILED_TRANSFERS_DEBUG)
{
NRFX_LOG_DEBUG("Transfer failed: EP is busy");
}
}
else
{
usbd_ep_state_t * p_state = ep_state_access(ep);
/* Prepare transfer context and handler description */
nrfx_usbd_transfer_t * p_context;
if (NRF_USBD_EPIN_CHECK(ep))
{
p_context = m_ep_feeder_state + NRF_USBD_EP_NR_GET(ep);
if (nrfx_is_in_ram(p_transfer->p_data.tx))
{
/* RAM */
if (0 == (p_transfer->flags & NRFX_USBD_TRANSFER_ZLP_FLAG))
{
p_state->handler.feeder = nrfx_usbd_feeder_ram;
if (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRFX_LOG_DEBUG(
"Transfer called on endpoint %x, size: %u, mode: "
"RAM",
ep,
p_transfer->size);
}
}
else
{
p_state->handler.feeder = nrfx_usbd_feeder_ram_zlp;
if (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRFX_LOG_DEBUG(
"Transfer called on endpoint %x, size: %u, mode: "
"RAM_ZLP",
ep,
p_transfer->size);
}
}
}
else
{
/* Flash */
if (0 == (p_transfer->flags & NRFX_USBD_TRANSFER_ZLP_FLAG))
{
p_state->handler.feeder = nrfx_usbd_feeder_flash;
if (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRFX_LOG_DEBUG(
"Transfer called on endpoint %x, size: %u, mode: "
"FLASH",
ep,
p_transfer->size);
}
}
else
{
p_state->handler.feeder = nrfx_usbd_feeder_flash_zlp;
if (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRFX_LOG_DEBUG(
"Transfer called on endpoint %x, size: %u, mode: "
"FLASH_ZLP",
ep,
p_transfer->size);
}
}
}
}
else
{
p_context = m_ep_consumer_state + NRF_USBD_EP_NR_GET(ep);
NRFX_ASSERT((p_transfer->p_data.rx == NULL) || (nrfx_is_in_ram(p_transfer->p_data.rx)));
p_state->handler.consumer = nrfx_usbd_consumer;
}
*p_context = *p_transfer;
p_state->p_context = p_context;
p_state->transfer_cnt = 0;
p_state->status = NRFX_USBD_EP_OK;
m_ep_dma_waiting |= 1U << ep_bitpos;
ret = NRFX_SUCCESS;
usbd_int_rise();
}
NRFX_CRITICAL_SECTION_EXIT();
return ret;
}
nrfx_err_t nrfx_usbd_ep_handled_transfer(
nrfx_usbd_ep_t ep,
nrfx_usbd_handler_desc_t const * p_handler)
{
nrfx_err_t ret;
const uint8_t ep_bitpos = ep2bit(ep);
NRFX_ASSERT(NULL != p_handler);
NRFX_CRITICAL_SECTION_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 = NRFX_ERROR_INVALID_ADDR;
if (NRFX_USBD_FAILED_TRANSFERS_DEBUG && (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep))))
{
NRFX_LOG_DEBUG("Transfer failed: Invalid EP");
}
}
else if ((m_ep_dma_waiting | ((~m_ep_ready) & NRFX_USBD_EPIN_BIT_MASK)) & (1U << ep_bitpos))
{
/* IN (Device -> Host) transfer has to be transmitted out to allow a new transmission */
ret = NRFX_ERROR_BUSY;
if (NRFX_USBD_FAILED_TRANSFERS_DEBUG && (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep))))
{
NRFX_LOG_DEBUG("Transfer failed: EP is busy");
}
}
else
{
/* Transfer can be configured now */
usbd_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 = NRFX_USBD_EP_OK;
m_ep_dma_waiting |= 1U << ep_bitpos;
ret = NRFX_SUCCESS;
if (NRFX_USBD_ISO_DEBUG || (!NRF_USBD_EPISO_CHECK(ep)))
{
NRFX_LOG_DEBUG("Transfer called on endpoint %x, mode: Handler", ep);
}
usbd_int_rise();
}
NRFX_CRITICAL_SECTION_EXIT();
return ret;
}
void * nrfx_usbd_feeder_buffer_get(void)
{
return m_tx_buffer;
}
nrfx_usbd_ep_status_t nrfx_usbd_ep_status_get(nrfx_usbd_ep_t ep, size_t * p_size)
{
nrfx_usbd_ep_status_t ret;
usbd_ep_state_t const * p_state = ep_state_access(ep);
NRFX_CRITICAL_SECTION_ENTER();
*p_size = p_state->transfer_cnt;
ret = (p_state->handler.consumer == NULL) ? p_state->status : NRFX_USBD_EP_BUSY;
NRFX_CRITICAL_SECTION_EXIT();
return ret;
}
size_t nrfx_usbd_epout_size_get(nrfx_usbd_ep_t ep)
{
return nrf_usbd_epout_size_get(ep_to_hal(ep));
}
bool nrfx_usbd_ep_is_busy(nrfx_usbd_ep_t ep)
{
return (0 != ((m_ep_dma_waiting | ((~m_ep_ready) & NRFX_USBD_EPIN_BIT_MASK)) & (1U << ep2bit(ep))));
}
void nrfx_usbd_ep_stall(nrfx_usbd_ep_t ep)
{
NRFX_LOG_DEBUG("USB: EP %x stalled.", ep);
nrf_usbd_ep_stall(ep_to_hal(ep));
}
void nrfx_usbd_ep_stall_clear(nrfx_usbd_ep_t ep)
{
if (NRF_USBD_EPOUT_CHECK(ep) && nrfx_usbd_ep_stall_check(ep))
{
nrfx_usbd_transfer_out_drop(ep);
}
nrf_usbd_ep_unstall(ep_to_hal(ep));
}
bool nrfx_usbd_ep_stall_check(nrfx_usbd_ep_t ep)
{
return nrf_usbd_ep_is_stall(ep_to_hal(ep));
}
void nrfx_usbd_ep_dtoggle_clear(nrfx_usbd_ep_t ep)
{
nrf_usbd_dtoggle_set(ep, NRF_USBD_DTOGGLE_DATA0);
}
void nrfx_usbd_setup_get(nrfx_usbd_setup_t * p_setup)
{
memset(p_setup, 0, sizeof(nrfx_usbd_setup_t));
p_setup->bmRequestType = nrf_usbd_setup_bmrequesttype_get();
p_setup->bRequest = 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 nrfx_usbd_setup_data_clear(void)
{
if (nrfx_usbd_errata_104())
{
/* 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 version of the chip. */
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);
}
}
void nrfx_usbd_setup_clear(void)
{
NRFX_LOG_DEBUG(">> ep0status >>");
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0STATUS);
}
void nrfx_usbd_setup_stall(void)
{
NRFX_LOG_DEBUG("Setup stalled.");
nrf_usbd_task_trigger(NRF_USBD_TASK_EP0STALL);
}
nrfx_usbd_ep_t nrfx_usbd_last_setup_dir_get(void)
{
return m_last_setup_dir;
}
void nrfx_usbd_transfer_out_drop(nrfx_usbd_ep_t ep)
{
NRFX_ASSERT(NRF_USBD_EPOUT_CHECK(ep));
if (nrfx_usbd_errata_200())
{
NRFX_CRITICAL_SECTION_ENTER();
m_ep_ready &= ~(1U << ep2bit(ep));
*((volatile uint32_t *)(NRF_USBD_BASE + 0x800)) = 0x7C5 + (2u * NRF_USBD_EP_NR_GET(ep));
*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)) = 0;
(void)(*((volatile uint32_t *)(NRF_USBD_BASE + 0x804)));
NRFX_CRITICAL_SECTION_EXIT();
}
else
{
NRFX_CRITICAL_SECTION_ENTER();
m_ep_ready &= ~(1U << ep2bit(ep));
if (!NRF_USBD_EPISO_CHECK(ep))
{
nrf_usbd_epout_clear(ep);
}
NRFX_CRITICAL_SECTION_EXIT();
}
}
#endif // NRFX_CHECK(NRFX_USBD_ENABLED)