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Diffstat (limited to 'arch/arm/cpu/ixp/npe/include/IxI2cDrv.h')
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diff --git a/arch/arm/cpu/ixp/npe/include/IxI2cDrv.h b/arch/arm/cpu/ixp/npe/include/IxI2cDrv.h new file mode 100644 index 0000000000..92c6b24b46 --- /dev/null +++ b/arch/arm/cpu/ixp/npe/include/IxI2cDrv.h @@ -0,0 +1,867 @@ +/** + * @file IxI2cDrv.h + * + * @brief Header file for the IXP400 I2C Driver (IxI2cDrv) + * + * @version $Revision: 0.1 $ + * + * @par + * IXP400 SW Release version 2.0 + * + * -- Copyright Notice -- + * + * @par + * Copyright 2001-2005, Intel Corporation. + * All rights reserved. + * + * @par + * 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 Intel Corporation nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * @par + * 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 OWNER 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. + * + * @par + * -- End of Copyright Notice -- + */ + +/** + * @defgroup IxI2cDrv IXP400 I2C Driver(IxI2cDrv) API + * + * @brief IXP400 I2C Driver Public API + * + * @{ + */ +#ifndef IXI2CDRV_H +#define IXI2CDRV_H + +#ifdef __ixp46X +#include "IxOsal.h" + +/* + * Section for #define + */ + +/** + * @ingroup IxI2cDrv + * @brief The interval of micro/mili seconds the IXP will wait before it polls for + * status from the ixI2cIntrXferStatus; Every 20us is 1 byte @ + * 400Kbps and 4 bytes @ 100Kbps. This is dependent on delay type selected + * through the API ixI2cDrvDelayTypeSelect. + */ +#define IX_I2C_US_POLL_FOR_XFER_STATUS 20 + +/** + * @ingroup IxI2cDrv + * @brief The number of tries that will be attempted to call a callback + * function if the callback does not or is unable to resolve the + * issue it is called to resolve + */ +#define IX_I2C_NUM_OF_TRIES_TO_CALL_CALLBACK_FUNC 10 + + +/** + * @ingroup IxI2cDrv + * @brief Number of tries slave will poll the IDBR Rx full bit before it + * gives up + */ +#define IX_I2C_NUM_TO_POLL_IDBR_RX_FULL 0x100 + +/** + * @ingroup IxI2cDrv + * @brief Number of tries slave will poll the IDBR Tx empty bit before it + * gives up + */ +#define IX_I2C_NUM_TO_POLL_IDBR_TX_EMPTY 0x100 + +/* + * Section for enum + */ + +/** + * @ingroup IxI2cDrv + * + * @enum IxI2cMasterStatus + * + * @brief The master status - transfer complete, bus error or arbitration loss + */ +typedef enum +{ + IX_I2C_MASTER_XFER_COMPLETE = IX_SUCCESS, + IX_I2C_MASTER_XFER_BUS_ERROR, + IX_I2C_MASTER_XFER_ARB_LOSS +} IxI2cMasterStatus; + + +/** + * @ingroup IxI2cDrv + * + * @enum IX_I2C_STATUS + * + * @brief The status that can be returned in a I2C driver initialization + */ +typedef enum +{ + IX_I2C_SUCCESS = IX_SUCCESS, /**< Success status */ + IX_I2C_FAIL, /**< Fail status */ + IX_I2C_NOT_SUPPORTED, /**< hardware does not have dedicated I2C hardware */ + IX_I2C_NULL_POINTER, /**< parameter passed in is NULL */ + IX_I2C_INVALID_SPEED_MODE_ENUM_VALUE, /**< speed mode selected is invalid */ + IX_I2C_INVALID_FLOW_MODE_ENUM_VALUE, /**< flow mode selected is invalid */ + IX_I2C_SLAVE_ADDR_CB_MISSING, /**< slave callback is NULL */ + IX_I2C_GEN_CALL_CB_MISSING, /**< general callback is NULL */ + IX_I2C_INVALID_SLAVE_ADDR, /**< invalid slave address specified */ + IX_I2C_INT_BIND_FAIL, /**< interrupt bind fail */ + IX_I2C_INT_UNBIND_FAIL, /**< interrupt unbind fail */ + IX_I2C_NOT_INIT, /**< I2C is not initialized yet */ + IX_I2C_MASTER_BUS_BUSY, /**< master detected a I2C bus busy */ + IX_I2C_MASTER_ARB_LOSS, /**< master experienced arbitration loss */ + IX_I2C_MASTER_XFER_ERROR, /**< master experienced a transfer error */ + IX_I2C_MASTER_BUS_ERROR, /**< master detected a I2C bus error */ + IX_I2C_MASTER_NO_BUFFER, /**< no buffer provided for master transfer */ + IX_I2C_MASTER_INVALID_XFER_MODE, /**< xfer mode selected is invalid */ + IX_I2C_SLAVE_ADDR_NOT_DETECTED, /**< polled slave addr not detected */ + IX_I2C_GEN_CALL_ADDR_DETECTED, /**< polling detected general call */ + IX_I2C_SLAVE_READ_DETECTED, /**< polling detected slave read request */ + IX_I2C_SLAVE_WRITE_DETECTED, /**< polling detected slave write request */ + IX_I2C_SLAVE_NO_BUFFER, /**< no buffer provided for slave transfers */ + IX_I2C_DATA_SIZE_ZERO, /**< data size transfer is zero - invalid */ + IX_I2C_SLAVE_WRITE_BUFFER_EMPTY, /**< slave buffer is used till empty */ + IX_I2C_SLAVE_WRITE_ERROR, /**< slave write experienced an error */ + IX_I2C_SLAVE_OR_GEN_READ_BUFFER_FULL, /**< slave buffer is filled up */ + IX_I2C_SLAVE_OR_GEN_READ_ERROR /**< slave read experienced an error */ +} IX_I2C_STATUS; + +/** + * @ingroup IxI2cDrv + * + * @enum IxI2cSpeedMode + * + * @brief Type of speed modes supported by the I2C hardware. + */ +typedef enum +{ + IX_I2C_NORMAL_MODE = 0x0, + IX_I2C_FAST_MODE +} IxI2cSpeedMode; + +/** + * @ingroup IxI2cDrv + * + * @enum IxI2cXferMode + * + * @brief Used for indicating it is a repeated start or normal transfer + */ +typedef enum +{ + IX_I2C_NORMAL = 0x0, + IX_I2C_REPEATED_START +} IxI2cXferMode; + +/** + * @ingroup IxI2cDrv + * + * @enum IxI2cFlowMode + * + * @brief Used for indicating it is a poll or interrupt mode + */ +typedef enum +{ + IX_I2C_POLL_MODE = 0x0, + IX_I2C_INTERRUPT_MODE +} IxI2cFlowMode; + +/** + * @ingroup IxI2cDrv + * + * @enum IxI2cDelayMode + * + * @brief Used for selecting looping delay or OS scheduler delay + */ +typedef enum +{ + IX_I2C_LOOP_DELAY = 1, /**< delay in microseconds */ + IX_I2C_SCHED_DELAY /**< delay in miliseconds */ +} IxI2cDelayMode; + +/** + * @ingroup IxI2cDrv + * + * @brief The pointer to the function that will be called when the master + * has completed its receive. The parameter that is passed will + * provide the status of the read (success, arb loss, or bus + * error), the transfer mode (normal or repeated start, the + * buffer pointer and number of bytes transferred. + */ +typedef void (*IxI2cMasterReadCallbackP)(IxI2cMasterStatus, IxI2cXferMode, char*, UINT32); + +/** + * @ingroup IxI2cDrv + * + * @brief The pointer to the function that will be called when the master + * has completed its transmit. The parameter that is passed will + * provide the status of the write (success, arb loss, or buss + * error), the transfer mode (normal or repeated start), the + * buffer pointer and number of bytes transferred. + */ +typedef void (*IxI2cMasterWriteCallbackP)(IxI2cMasterStatus, IxI2cXferMode, char*, UINT32); + +/** + * @ingroup IxI2cDrv + * + * @brief The pointer to the function that will be called when a slave + * address detected in interrupt mode for a read. The parameters + * that is passed will provide the read status, buffer pointer, + * buffer size, and the bytes received. When a start of a read + * is initiated there will be no buffer allocated and this callback + * will be called to request for a buffer. While receiving, if the + * buffer gets filled, this callback will be called to request for + * a new buffer while sending the filled buffer's pointer and size, + * and data size received. When the receive is complete, this + * callback will be called to process the data and free the memory + * by passing the buffer's pointer and size, and data size received. + */ +typedef void (*IxI2cSlaveReadCallbackP)(IX_I2C_STATUS, char*, UINT32, UINT32); + +/** + * @ingroup IxI2cDrv + * + * @brief The pointer to the function that will be called when a slave + * address detected in interrupt mode for a write. The parameters + * that is passed will provide the write status, buffer pointer, + * buffer size, and the bytes received. When a start of a write is + * initiated there will be no buffer allocated and this callback + * will be called to request for a buffer and to fill it with data. + * While transmitting, if the data in the buffer empties, this + * callback will be called to request for more data to be filled in + * the same or new buffer. When the transmit is complete, this + * callback will be called to free the memory or other actions to + * be taken. + */ +typedef void (*IxI2cSlaveWriteCallbackP)(IX_I2C_STATUS, char*, UINT32, UINT32); + +/** + * @ingroup IxI2cDrv + * + * @brief The pointer to the function that will be called when a general + * call detected in interrupt mode for a read. The parameters that + * is passed will provide the read status, buffer pointer, buffer + * size, and the bytes received. When a start of a read is + * initiated there will be no buffer allocated and this callback + * will be called to request for a buffer. While receiving, if the + * buffer gets filled, this callback will be called to request for + * a new buffer while sending the filled buffer's pointer and size, + * and data size received. When the receive is complete, this + * callback will be called to process the data and free the memory + * by passing the buffer's pointer and size, and data size received. + */ +typedef void (*IxI2cGenCallCallbackP)(IX_I2C_STATUS, char*, UINT32, UINT32); + +/* + * Section for struct + */ + +/** + * @brief contains all the variables required to initialize the I2C unit + * + * Structure to be filled and used for calling initialization + */ +typedef struct +{ + IxI2cSpeedMode I2cSpeedSelect; /**<Select either normal (100kbps) + or fast mode (400kbps)*/ + IxI2cFlowMode I2cFlowSelect; /**<Select interrupt or poll mode*/ + IxI2cMasterReadCallbackP MasterReadCBP; + /**<The master read callback pointer */ + IxI2cMasterWriteCallbackP MasterWriteCBP; + /**<The master write callback pointer */ + IxI2cSlaveReadCallbackP SlaveReadCBP; + /**<The slave read callback pointer */ + IxI2cSlaveWriteCallbackP SlaveWriteCBP; + /**<The slave write callback pointer */ + IxI2cGenCallCallbackP GenCallCBP; + /**<The general call callback pointer */ + BOOL I2cGenCallResponseEnable; /**<Enable/disable the unit to + respond to generall calls.*/ + BOOL I2cSlaveAddrResponseEnable;/**<Enable/disable the unit to + respond to the slave address set in + ISAR*/ + BOOL SCLEnable; /**<Enable/disable the unit from + driving the SCL line during master + mode operation*/ + UINT8 I2cHWAddr; /**<The address the unit will + response to as a slave device*/ +} IxI2cInitVars; + +/** + * @brief contains results of counters and their overflow + * + * Structure contains all values of counters and associated overflows. + */ +typedef struct +{ + UINT32 ixI2cMasterXmitCounter; /**<Total bytes transmitted as + master.*/ + UINT32 ixI2cMasterFailedXmitCounter; /**<Total bytes failed for + transmission as master.*/ + UINT32 ixI2cMasterRcvCounter; /**<Total bytes received as + master.*/ + UINT32 ixI2cMasterFailedRcvCounter; /**<Total bytes failed for + receival as master.*/ + UINT32 ixI2cSlaveXmitCounter; /**<Total bytes transmitted as + slave.*/ + UINT32 ixI2cSlaveFailedXmitCounter; /**<Total bytes failed for + transmission as slave.*/ + UINT32 ixI2cSlaveRcvCounter; /**<Total bytes received as + slave.*/ + UINT32 ixI2cSlaveFailedRcvCounter; /**<Total bytes failed for + receival as slave.*/ + UINT32 ixI2cGenAddrCallSucceedCounter; /**<Total bytes successfully + transmitted for general address.*/ + UINT32 ixI2cGenAddrCallFailedCounter; /**<Total bytes failed transmission + for general address.*/ + UINT32 ixI2cArbLossCounter; /**<Total instances of arbitration + loss has occured.*/ +} IxI2cStatsCounters; + + +/* + * Section for prototypes interface functions + */ + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvInit( + IxI2cInitVars *InitVarsSelected) + * + * @brief Initializes the I2C Driver. + * + * @param "IxI2cInitVars [in] *InitVarsSelected" - struct containing required + * variables for initialization + * + * Global Data : + * - None. + * + * This API will check if the hardware supports this I2C driver and the validity + * of the parameters passed in. It will continue to process the parameters + * passed in by setting the speed of the I2C unit (100kbps or 400kbps), setting + * the flow to either interrupt or poll mode, setting the address of the I2C unit, + * enabling/disabling the respond to General Calls, enabling/disabling the respond + * to Slave Address and SCL line driving. If it is interrupt mode, then it will + * register the callback routines for master, slavetransfer and general call receive. + * + * @return + * - IX_I2C_SUCCESS - Successfully initialize and enable the I2C + * hardware. + * - IX_I2C_NOT_SUPPORTED - The hardware does not support or have a + * dedicated I2C unit to support this driver + * - IX_I2C_NULL_POINTER - The parameter passed in is a NULL pointed + * - IX_I2C_INVALID_SPEED_MODE_ENUM_VALUE - The speed mode selected in the + * InitVarsSelected is invalid + * - IX_I2C_INVALID_FLOW_MODE_ENUM_VALUE - The flow mode selected in the + * InitVarsSelected is invalid + * - IX_I2C_INVALID_SLAVE_ADDR - The address 0x0 is reserved for + * general call. + * - IX_I2C_SLAVE_ADDR_CB_MISSING - interrupt mode is selected but + * slave address callback pointer is NULL + * - IX_I2C_GEN_CALL_CB_MISSING - interrupt mode is selected but + * general call callback pointer is NULL + * - IX_I2C_INT_BIND_FAIL - The ISR for the I2C failed to bind + * - IX_I2C_INT_UNBIND_FAIL - The ISR for the I2C failed to unbind + * + * @li Reentrant : yes + * @li ISR Callable : yes + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvInit(IxI2cInitVars *InitVarsSelected); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvUninit( + void) + * + * @brief Disables the I2C hardware + * + * @param - None + * + * Global Data : + * - None. + * + * This API will disable the I2C hardware, unbind interrupt, and unmap memory. + * + * @return + * - IX_I2C_SUCCESS - successfully un-initialized I2C + * - IX_I2C_INT_UNBIND_FAIL - failed to unbind the I2C interrupt + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : yes + * @li ISR Callable : yes + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvUninit(void); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvSlaveAddrSet( + UINT8 SlaveAddrSet) + * + * @brief Sets the I2C Slave Address + * + * @param "UINT8 [in] SlaveAddrSet" - Slave Address to be inserted into ISAR + * + * Global Data : + * - None. + * + * This API will insert the SlaveAddrSet into the ISAR. + * + * @return + * - IX_I2C_SUCCESS - successfuly set the slave addr + * - IX_I2C_INVALID_SLAVE_ADDR - invalid slave address (zero) specified + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : yes + * @li ISR Callable : yes + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvSlaveAddrSet(UINT8 SlaveAddrSet); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvBusScan( + void) + * + * @brief scans the I2C bus for slave devices + * + * @param - None + * + * Global Data : + * - None. + * + * This API will prompt all slave addresses for a reply except its own + * + * @return + * - IX_I2C_SUCCESS - found at least one slave device + * - IX_I2C_FAIL - Fail to find even one slave device + * - IX_I2C_BUS_BUSY - The I2C bus is busy (held by another I2C master) + * - IX_I2C_ARB_LOSS - The I2C bus was loss to another I2C master + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : yes + * @li ISR Callable : yes + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvBusScan(void); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvWriteTransfer( + UINT8 SlaveAddr, + char *bufP, + UINT32 dataSize, + IxI2cXferMode XferModeSelect) + * + * @param "UINT8 [in] SlaveAddr" - The slave address to request data from. + * @param "char [in] *bufP" - The pointer to the data to be transmitted. + * @param "UINT32 [in] dataSize" - The number of bytes requested. + * @param "IxI2cXferMode [in] XferModeSelect" - the transfer mode selected, + * either repeated start (ends w/o stop) or normal (start and stop) + * + * Global Data : + * - None. + * + * This API will try to obtain master control of the I2C bus and transmit the + * number of bytes, specified by dataSize, to the user specified slave + * address from the buffer pointer. It will use either interrupt or poll mode + * depending on the method selected. + * + * If in interrupt mode and IxI2cMasterWriteCallbackP is not NULL, the driver + * will initiate the transfer and return immediately. The function pointed to + * by IxI2cMasterWriteCallbackP will be called in the interrupt service + * handlers when the operation is complete. + * + * If in interrupt mode and IxI2cMasterWriteCallbackP is NULL, then the driver + * will wait for the operation to complete, and then return. + * + * And if the repeated start transfer mode is selected, then it will not send a + * stop signal at the end of all the transfers. + * *NOTE*: If repeated start transfer mode is selected, it has to end with a + * normal mode transfer mode else the bus will continue to be held + * by the IXP. + * + * @return + * - IX_I2C_SUCCESS - Successfuuly wrote data to slave. + * - IX_I2C_MASTER_BUS_BUSY - The I2C bus is busy (held by another I2C master) + * - IX_I2C_MASTER_ARB_LOSS - The I2C bus was loss to another I2C master + * - IX_I2C_MASTER_XFER_ERROR - There was a transfer error + * - IX_I2C_MASTER_BUS_ERROR - There was a bus error during transfer + * - IX_I2C_MASTER_NO_BUFFER - buffer pointer is NULL + * - IX_I2C_MASTER_INVALID_XFER_MODE - Xfer mode selected is invalid + * - IX_I2C_DATA_SIZE_ZERO - dataSize passed in is zero, which is invalid + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : no + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvWriteTransfer( + UINT8 SlaveAddr, + char *bufP, + UINT32 dataSize, + IxI2cXferMode XferModeSelect); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvReadTransfer( + UINT8 SlaveAddr, + char *bufP, + UINT32 dataSize, + IxI2cXferMode XferModeSelect) + * + * @brief Initiates a transfer to receive bytes of data from a slave + * device through the I2C bus. + * + * @param "UINT8 [in] SlaveAddr" - The slave address to request data from. + * @param "char [out] *bufP" - The pointer to the buffer to store the + * requested data. + * @param "UINT32 [in] dataSize" - The number of bytes requested. + * @param "IxI2cXferMode [in] XferModeSelect" - the transfer mode selected, + * either repeated start (ends w/o stop) or normal (start and stop) + * + * Global Data : + * - None. + * + * This API will try to obtain master control of the I2C bus and receive the + * number of bytes, specified by dataSize, from the user specified address + * into the receive buffer. It will use either interrupt or poll mode depending + * on the mode selected. + * + * If in interrupt mode and IxI2cMasterReadCallbackP is not NULL, the driver + * will initiate the transfer and return immediately. The function pointed to + * by IxI2cMasterReadCallbackP will be called in the interrupt service + * handlers when the operation is complete. + * + * If in interrupt mode and IxI2cMasterReadCallbackP is NULL, then the driver will + * wait for the operation to complete, and then return. + * + * And if the repeated start transfer mode is selected, then it will not send a + * stop signal at the end of all the transfers. + * *NOTE*: If repeated start transfer mode is selected, it has to end with a + * normal mode transfer mode else the bus will continue to be held + * by the IXP. + * + * @return + * - IX_I2C_SUCCESS - Successfuuly read slave data + * - IX_I2C_MASTER_BUS_BUSY - The I2C bus is busy (held by another I2C master) + * - IX_I2C_MASTER_ARB_LOSS - The I2C bus was loss to another I2C master + * - IX_I2C_MASTER_XFER_ERROR - There was a bus error during transfer + * - IX_I2C_MASTER_BUS_ERROR - There was a bus error during transfer + * - IX_I2C_MASTER_NO_BUFFER - buffer pointer is NULL + * - IX_I2C_MASTER_INVALID_XFER_MODE - Xfer mode selected is invalid + * - IX_I2C_INVALID_SLAVE_ADDR - invalid slave address (zero) specified + * - IX_I2C_DATA_SIZE_ZERO - dataSize passed in is zero, which is invalid + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : no + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvReadTransfer( + UINT8 SlaveAddr, + char *bufP, + UINT32 dataSize, + IxI2cXferMode XferModeSelect); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvSlaveAddrAndGenCallDetectedCheck( + void) + * + * @brief Checks the I2C Status Register to determine if a slave address is + * detected + * + * @param - None + * + * Global Data : + * - None. + * + * This API is used in polled mode to determine if the I2C unit is requested + * for a slave or general call transfer. If it is requested for a slave + * transfer then it will determine if it is a general call (read only), read, + * or write transfer requested. + * + * @return + * - IX_I2C_SLAVE_ADDR_NOT_DETECTED - The I2C unit is not requested for slave + * transfer + * - IX_I2C_GEN_CALL_ADDR_DETECTED - The I2C unit is not requested for slave + * transfer but for general call + * - IX_I2C_SLAVE_READ_DETECTED - The I2C unit is requested for a read + * - IX_I2C_SLAVE_WRITE_DETECTED - The I2C unit is requested for a write + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : no + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvSlaveAddrAndGenCallDetectedCheck(void); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvSlaveOrGenDataReceive( + char *bufP, + UINT32 bufSize, + UINT32 *dataSizeRcvd) + * + * @brief Performs the slave receive or general call receive data transfer + * + * @param "char [in] *bufP" - the pointer to the buffer to store data + * "UINT32 [in] bufSize" - the buffer size allocated + * "UINT32 [in] *dataSizeRcvd" - the length of data received in bytes + * + * Global Data : + * - None. + * + * This API is only used in polled mode to perform the slave read or general call + * receive data. It will continuously store the data received into bufP until + * complete or until bufP is full in which it will return + * IX_I2C_SLAVE_OR_GEN_READ_BUFFER_FULL. If in interrupt mode, the callback will be + * used. + * + * @return + * - IX_I2C_SUCCESS - The I2C driver transferred the data successfully. + * - IX_I2C_SLAVE_OR_GEN_READ_BUFFER_FULL - The I2C driver has ran out of + * space to store the received data. + * - IX_I2C_SLAVE_OR_GEN_READ_ERROR - The I2C driver didn't manage to + * detect the IDBR Rx Full bit + * - IX_I2C_DATA_SIZE_ZERO - bufSize passed in is zero, which is invalid + * - IX_I2C_SLAVE_NO_BUFFER - buffer pointer is NULL + * - IX_I2C_NULL_POINTER - dataSizeRcvd is NULL + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : no + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvSlaveOrGenDataReceive( + char *bufP, + UINT32 bufSize, + UINT32 *dataSizeRcvd); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvSlaveDataTransmit( + char *bufP, + UINT32 dataSize, + UINT32 *dataSizeXmtd) + * + * @brief Performs the slave write data transfer + * + * @param "char [in] *bufP" - the pointer to the buffer for data to be + * transmitted + * "UINT32 [in] bufSize" - the buffer size allocated + * "UINT32 [in] *dataSizeRcvd" - the length of data trasnmitted in + * bytes + * + * Global Data : + * - None. + * + * This API is only used in polled mode to perform the slave transmit data. It + * will continuously transmit the data from bufP until complete or until bufP + * is empty in which it will return IX_I2C_SLAVE_WRITE_BUFFER_EMPTY. If in + * interrupt mode, the callback will be used. + * + * @return + * - IX_I2C_SUCCESS - The I2C driver transferred the data successfully. + * - IX_I2C_SLAVE_WRITE_BUFFER_EMPTY - The I2C driver needs more data to + * transmit. + * - IX_I2C_SLAVE_WRITE_ERROR -The I2C driver didn't manage to detect the + * IDBR Tx empty bit or the slave stop bit. + * - IX_I2C_DATA_SIZE_ZERO - dataSize passed in is zero, which is invalid + * - IX_I2C_SLAVE_NO_BUFFER - buffer pointer is NULL + * - IX_I2C_NULL_POINTER - dataSizeXmtd is NULL + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : no + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvSlaveDataTransmit( + char *bufP, + UINT32 dataSize, + UINT32 *dataSizeXmtd); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvSlaveOrGenCallBufReplenish( + char *bufP, + UINT32 bufSize) + * + * @brief Replenishes the buffer which stores buffer info for both slave and + * general call + * + * @param "char [in] *bufP" - pointer to the buffer allocated + * "UINT32 [in] bufSize" - size of the buffer + * + * Global Data : + * - None. + * + * This API is only used in interrupt mode for replenishing the same buffer + * that is used by both slave and generall call by updating the buffer info + * with new info and clearing previous offsets set by previous transfers. + * + * @return + * - None + * + * @li Reentrant : no + * @li ISR Callable : no + * + */ +PUBLIC void +ixI2cDrvSlaveOrGenCallBufReplenish( + char *bufP, + UINT32 bufSize); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvStatsGet(IxI2cStatsCounters *I2cStats) + * + * @brief Returns the I2C Statistics through the pointer passed in + * + * @param - "IxI2cStatsCounters [out] *I2cStats" - I2C statistics counter will + * be read and written to the location pointed by this pointer. + * + * Global Data : + * - None. + * + * This API will return the statistics counters of the I2C driver. + * + * @return + * - IX_I2C_NULL_POINTER - pointer passed in is NULL + * - IX_I2C_SUCCESS - successfully obtained I2C statistics + * + * @li Reentrant : yes + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvStatsGet(IxI2cStatsCounters *I2cStats); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvStatsReset(void) + * + * @brief Reset I2C statistics counters. + * + * @param - None + * + * Global Data : + * - None. + * + * This API will reset the statistics counters of the I2C driver. + * + * @return + * - None + * + * @li Reentrant : yes + * @li ISR Callable : no + * + */ +PUBLIC void +ixI2cDrvStatsReset(void); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvShow(void) + * + * @brief Displays the I2C status register and the statistics counter. + * + * @param - None + * + * Global Data : + * - None. + * + * This API will display the I2C Status register and is useful if any error + * occurs. It displays the detection of bus error, slave address, general call, + * address, IDBR receive full, IDBR transmit empty, arbitration loss, slave + * STOP signal, I2C bus busy, unit busy, ack/nack, and read/write mode. It will + * also call the ixI2cDrvGetStats and then display the statistics counter. + * + * @return + * - IX_I2C_SUCCESS - successfully displayed statistics and status register + * - IX_I2C_NOT_INIT - I2C not init yet. + * + * @li Reentrant : yes + * @li ISR Callable : no + * + */ +PUBLIC IX_I2C_STATUS +ixI2cDrvShow(void); + +/** + * @ingroup IxI2cDrv + * + * @fn ixI2cDrvDelayTypeSelect (IxI2cDelayMode delayMechanismSelect) + * + * @brief Sets the delay type of either looping delay or OS scheduler delay + * according to the argument provided. + * + * @param - "IxI2cDelayMode [in] delayTypeSelect" - the I2C delay type selected + * + * Global Data : + * - None. + * + * This API will set the delay type used by the I2C Driver to either looping + * delay or OS scheduler delay. + * + * @return + * - None + * + * @li Reentrant : yes + * @li ISR Callable : no + * + */ +PUBLIC void +ixI2cDrvDelayTypeSelect (IxI2cDelayMode delayTypeSelect); + +#endif /* __ixp46X */ +#endif /* IXI2CDRV_H */ |
