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Diffstat (limited to 'board/st/u8500/i2c.c')
| -rwxr-xr-x | board/st/u8500/i2c.c | 3029 |
1 files changed, 0 insertions, 3029 deletions
diff --git a/board/st/u8500/i2c.c b/board/st/u8500/i2c.c deleted file mode 100755 index 9c23c29db..000000000 --- a/board/st/u8500/i2c.c +++ /dev/null @@ -1,3029 +0,0 @@ -/* - * (C) Copyright 2009 - * STEricsson, <www.stericsson.com> - * - * See file CREDITS for list of people who contributed to this - * project. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation; either version 2 of - * the License, or (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, - * MA 02111-1307 USA - */ - -#include "i2c.h" - -/*--------------------------------------------------------------------------- - * defines - *---------------------------------------------------------------------------*/ -/* 8500 has 4 I2C controllers */ -t_i2c_registers *gp_i2c_registers[4]; - -#define I2C_ENDAD_COUNTER 500000 -#define I2C_INT_ENDED_COUNTER 5 -#define I2C_BTF_COUNTER 5 -#define I2C_BTF_COUNTER_POLLING 10 -#define I2C_FIFO_FLUSH_COUNTER 500 - -/*----------------------------------------------------------------------------- -Global variables ------------------------------------------------------------------------------*/ - -/* 8500 has 4 I2C Controllers */ - volatile t_i2c_system_context g_i2c_system_context[4]; - -#undef I2C_DEBUG -#ifdef I2C_DEBUG -#define info(fmt,args...) printf("I2C: "fmt, ##args) -#else -#define info(fmt,args...) (void) 0; -#endif - - -/*----------------------------------------------------------------------------- - Configuration functions ------------------------------------------------------------------------------*/ -/****************************************************************************/ -/* NAME : I2C_Init */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Initialize the given I2C controller by specifying the */ -/* base logical address. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* t_logical_address : The controller's logical address */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are invalid */ -/* I2C_UNSUPPORTED_HW if peripheral ids are not matched */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_Init(t_i2c_device_id id, t_logical_address address) -{ - t_i2c_registers *p_i2c_registers; - - /* - Check if the controller id is valid. - */ - - - if (((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id) ) || (NULL == address)) - { - return(I2C_INVALID_PARAMETER); - } - - - - p_i2c_registers = (t_i2c_registers *) address; - - - if - ( - (I2C_P_ID_0 != p_i2c_registers->periph_id_0) - || (I2C_P_ID_1 != p_i2c_registers->periph_id_1) - || (I2C_P_ID_2 != p_i2c_registers->periph_id_2) - || (I2C_P_ID_3 != p_i2c_registers->periph_id_3) - || (I2C_CELL_ID_0 != p_i2c_registers->cell_id_0) - || (I2C_CELL_ID_1 != p_i2c_registers->cell_id_1) - || (I2C_CELL_ID_2 != p_i2c_registers->cell_id_2) - || (I2C_CELL_ID_3 != p_i2c_registers->cell_id_3) - ) - { - return(I2C_UNSUPPORTED_HW); - } - - - /* - Initialize the right structure and save the base address. - */ - g_i2c_system_context[id].base_address = address; - g_i2c_system_context[id].freq_scl = 0; - g_i2c_system_context[id].freq_input = 0; - g_i2c_system_context[id].mode = I2C_FREQ_MODE_STANDARD; - g_i2c_system_context[id].own_address = 0; - g_i2c_system_context[id].enabled = FALSE; - g_i2c_system_context[id].slave_address = 0; - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_MODE; - g_i2c_system_context[id].data = 0; - g_i2c_system_context[id].databuffer = NULL; - g_i2c_system_context[id].count_data = 0; - g_i2c_system_context[id].register_index = 0; - g_i2c_system_context[id].operation = (t_i2c_operation) I2C_NO_OPERATION; - g_i2c_system_context[id].active_event = I2C_NO_EVENT; - g_i2c_system_context[id].transfer_data = 0; - g_i2c_system_context[id].multi_operation = FALSE; - - /* g_i2c_system_context[id].i2c_device_context... to be initialized*/ - g_i2c_system_context[id].digital_filter_control = I2C_DIGITAL_FILTERS_OFF; - g_i2c_system_context[id].dma_sync_logic_control = I2C_DISABLE; - g_i2c_system_context[id].start_byte_procedure = I2C_DISABLE; - g_i2c_system_context[id].slave_data_setup_time = 0; /* TBD */ - g_i2c_system_context[id].high_speed_master_code = 0; - g_i2c_system_context[id].bus_control_mode = I2C_BUS_SLAVE_MODE; - g_i2c_system_context[id].i2c_loopback_mode = I2C_DISABLE; - g_i2c_system_context[id].general_call_mode_handling = I2C_NO_GENERAL_CALL_HANDLING; - - g_i2c_system_context[id].index_transfer_mode = I2C_TRANSFER_MODE_POLLING; - g_i2c_system_context[id].data_transfer_mode = I2C_TRANSFER_MODE_POLLING; - g_i2c_system_context[id].i2c_transmit_interrupt_threshold = 1; - g_i2c_system_context[id].i2c_receive_interrupt_threshold = 1; - g_i2c_system_context[id].transmit_burst_length = 0; - g_i2c_system_context[id].receive_burst_length = 0; - g_i2c_system_context[id].index_format = I2C_NO_INDEX; - g_i2c_system_context[id].current_bus_config = I2C_CURRENT_BUS_SLAVE_TRANSMITTER; - g_i2c_system_context[id].std = FALSE; - - - /*Disable the interrupts */ - I2C_WRITE_REG(p_i2c_registers->imscr,I2C_CLEAR); - /* Disable the controller */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_PE); - - return(I2C_OK); -} - - -/****************************************************************************/ -/* NAME : I2C_SetDeviceConfiguration */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Configure the given I2C controller, by clearing */ -/* registers, setting the input clock. The controller and */ -/* interrupts are disabled after this routine */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* t_i2c_device_config : pointer to the structer containg */ -/* the configuration */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not invalid*/ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_SetDeviceConfiguration(t_i2c_device_id id, t_i2c_device_config *p_device_config) -{ - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - - - /* Check if parameters are valid.*/ - - if (NULL == p_device_config || ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id))) - { - return(I2C_INVALID_PARAMETER); - } - - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* Disable the controller.*/ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_PE); - - /* Save the value.*/ - g_i2c_system_context[id].enabled = FALSE; - - /* Now save the input parameters.*/ - g_i2c_system_context[id].digital_filter_control = p_device_config->i2c_digital_filter_control; - g_i2c_system_context[id].slave_data_setup_time = p_device_config->slave_data_setup_time; - g_i2c_system_context[id].dma_sync_logic_control = p_device_config->i2c_dma_sync_logic_control; - g_i2c_system_context[id].start_byte_procedure = p_device_config->i2c_start_byte_procedure; - g_i2c_system_context[id].high_speed_master_code = p_device_config->i2c_high_speed_master_code; - g_i2c_system_context[id].freq_input = p_device_config->input_frequency; - g_i2c_system_context[id].own_address = p_device_config->controller_i2c_address; - - /* Clear registers.*/ - I2C_WRITE_REG(p_i2c_registers->cr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->scr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->hsmcr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->tftr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->rftr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->dmar, I2C_CLEAR); - - /* Set own address.*/ - error_status = i2cp_SetOwnAddress(id, (u16) g_i2c_system_context[id].own_address); - if (I2C_OK != error_status) - { - return(error_status); - } - - /* set the digital filter */ - I2C_WRITE_FIELD - ( - p_i2c_registers->cr, - I2C_CR_FON, - I2C_CR_SHIFT_FON, - (u32) g_i2c_system_context[id].digital_filter_control - ); - - /* Set the DMA sync logic */ - I2C_WRITE_FIELD - ( - p_i2c_registers->cr, - I2C_CR_DMA_SLE, - I2C_CR_SHIFT_DMA_SLE, - (u32) g_i2c_system_context[id].dma_sync_logic_control - ); - - /* Set the Slave Data Set up Time */ - I2C_WRITE_FIELD - ( - p_i2c_registers->scr, - I2C_SCR_DATA_SETUP_TIME, - I2C_SCR_SHIFT_DATA_SETUP_TIME, - g_i2c_system_context[id].slave_data_setup_time - ); - - /* Disable generation of interrupts.*/ - I2C_DisableIRQSrc((t_i2c_irq_src_id) (((u32) id << (u32) I2CID_SHIFT) | (u32) I2C_IRQ_SRC_ALL)); /* - Single Interrupt source matches - the sequence of device ids they - are used interchangeably. - */ - - /* Enable the I2C Controller */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - - return(error_status); - -} - -/****************************************************************************/ -/* NAME : I2C_SetTransferConfiguration */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Configure the given I2C controller for transfer mode, */ -/* baud rate, general call handling and bus access mode. */ -/* Additionally fifo levels, loopback control and DMA */ -/* burst length are also configured. */ -/* This routine enable the I2C controller */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* t_i2c_transfer_config :pointer to the structure containing */ -/* the configuration */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/* I2C_UNSUPPORTED_FEATURE if required index and data */ -/* transfer modes are not supported. */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ - -/****************************************************************************/ - t_i2c_error I2C_SetTransferConfiguration(t_i2c_device_id id, t_i2c_transfer_config *p_transfer_config) -{ - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - - /* Check if parameters are valid.*/ - - if (NULL == p_transfer_config || ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id))) - { - return(I2C_INVALID_PARAMETER); - } - - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - - /* - Error handling for unsopported features according to the platform - */ - if - ( - ( - I2C_TRANSFER_MODE_POLLING != p_transfer_config->index_transfer_mode - && I2C_TRANSFER_MODE_POLLING == p_transfer_config->data_transfer_mode - ) - || ( (I2C_TRANSFER_MODE_INTERRUPT == p_transfer_config->index_transfer_mode) - && (I2C_TRANSFER_MODE_DMA == p_transfer_config->data_transfer_mode) - ) - - || (I2C_TRANSFER_MODE_DMA == p_transfer_config->index_transfer_mode) - ) - { - return(I2C_UNSUPPORTED_FEATURE); - } - - /* - Clear all the existing state of the controller by clearing PE bit - */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_PE); - - /* Now save the input parameters.*/ - g_i2c_system_context[id].i2c_loopback_mode = p_transfer_config->i2c_loopback_mode; - g_i2c_system_context[id].general_call_mode_handling = p_transfer_config->i2c_slave_general_call_mode; - g_i2c_system_context[id].index_transfer_mode = p_transfer_config->index_transfer_mode; - - /*Index transfer mode is still relevant even if I2C_NO_INDEX is - used since then this mode is used for the address transmission */ - - g_i2c_system_context[id].data_transfer_mode = p_transfer_config->data_transfer_mode; - g_i2c_system_context[id].i2c_transmit_interrupt_threshold = p_transfer_config->i2c_transmit_interrupt_threshold; - g_i2c_system_context[id].i2c_receive_interrupt_threshold = p_transfer_config->i2c_receive_interrupt_threshold; - g_i2c_system_context[id].transmit_burst_length = p_transfer_config->transmit_burst_length; - g_i2c_system_context[id].receive_burst_length = p_transfer_config->receive_burst_length; - g_i2c_system_context[id].freq_scl = p_transfer_config->i2c_transfer_frequency; - g_i2c_system_context[id].bus_control_mode = p_transfer_config->bus_control_mode; - - g_i2c_system_context[id].multi_operation = FALSE; - g_i2c_system_context[id].register_index = 0; /* The index of the slave's registers*/ - g_i2c_system_context[id].index_format = I2C_NO_INDEX; - - - /* Set the SCL bus clock frequency. -> transfer frequency*/ - error_status = i2cp_SetBusClock(id, g_i2c_system_context[id].freq_scl, g_i2c_system_context[id].freq_input); - if (I2C_OK != error_status) - { - return(error_status); - } - - /*Set the loop back mode */ - I2C_WRITE_FIELD - ( - p_i2c_registers->cr, - I2C_CR_LM, - I2C_CR_SHIFT_LM, - (u32) g_i2c_system_context[id].i2c_loopback_mode - ); - - /* Enable the general call handing in the controller*/ - /* Only possible general call handing in this controller is - in the software mode. - */ - if (I2C_HARDWARE_GENERAL_CALL_HANDLING == g_i2c_system_context[id].general_call_mode_handling) - { - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_SGCM); - } - else - { - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_SGCM); - } - - /* Disable the Tx DMA */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_DMA_TX_EN); - - /* Disable the Rx DMA */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_DMA_RX_EN); - - /* configure the Tx DMA burst size */ - if (g_i2c_system_context[id].transmit_burst_length >= 1) - { - /* set the DMA Tx request mode to Burst */ - I2C_SET_BIT(p_i2c_registers->dmar, I2C_DMA_BURST_TX); - - /* Set the Destination Burst Size */ - I2C_WRITE_FIELD - ( - p_i2c_registers->dmar, - I2C_DMA_DBSIZE_TX, - I2C_DMA_SHIFT_DBSIZE_TX, - g_i2c_system_context[id].transmit_burst_length - ); - } - else - { - /* Set the DMA Tx Request mode to Single */ - I2C_CLR_BIT(p_i2c_registers->dmar, I2C_DMA_BURST_TX); - } - - /* configure the Rx DMA burst size */ - if (g_i2c_system_context[id].receive_burst_length >= 1) - { - /* set the DMA Rx request mode to Burst */ - I2C_SET_BIT(p_i2c_registers->dmar, I2C_DMA_BURST_RX); - - /* Set the source burst size */ - I2C_WRITE_FIELD - ( - p_i2c_registers->dmar, - I2C_DMA_SBSIZE_RX, - I2C_DMA_SHIFT_SBSIZE_RX, - g_i2c_system_context[id].receive_burst_length - ); - } - else - { - /* Set the DMA Rx Request mode to Single */ - I2C_CLR_BIT(p_i2c_registers->dmar, I2C_DMA_BURST_RX); - } - - /* Set the Bus control mode */ - I2C_WRITE_FIELD - ( - p_i2c_registers->cr, - I2C_CR_OM, - I2C_CR_SHIFT_OM, - (u32) g_i2c_system_context[id].bus_control_mode - ); - - /* Set the Transmit Fifo threshold value */ - p_i2c_registers->tftr = g_i2c_system_context[id].i2c_transmit_interrupt_threshold; - - /* Set the Receive Fifo Threshold value */ - p_i2c_registers->rftr = g_i2c_system_context[id].i2c_receive_interrupt_threshold; - - /*Disable the interrupts if index transfer mode is polling */ - if (I2C_TRANSFER_MODE_POLLING == g_i2c_system_context[id].index_transfer_mode) - { - I2C_DisableIRQSrc((t_i2c_irq_src_id) (((u32) id << (u32) I2CID_SHIFT) | (u32) I2C_IRQ_SRC_ALL)); - } - - /* Now restore CR register with the values it has before it was disabled.*/ - /*Enable the I2C Controller and set the enable status in the global structure */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - g_i2c_system_context[id].enabled = TRUE; - - return(error_status); - -} - -/****************************************************************************/ -/* NAME : I2C_SetTransferMode */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Set the transfer modes for the index and data transfer */ -/* on the given I2C controller */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* t_i2c_transfer_mode : Index transfer mode */ -/* t_i2c_transfer_mode : data transger mode */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/* I2C_UNSUPPORTED_FEATURE if required index and data */ -/* transfer modes are not supported. */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_SetTransferMode -( - t_i2c_device_id id, - t_i2c_transfer_mode index_transfer_mode, - t_i2c_transfer_mode data_transfer_mode -) -{ - info( - "Id is %d, index and data transfer modes are %lx and %lx", - id, - (u32) index_transfer_mode, - (u32) data_transfer_mode - ); - - if - ( - (I2C_TRANSFER_MODE_POLLING != index_transfer_mode && I2C_TRANSFER_MODE_POLLING == data_transfer_mode) - || ( (I2C_TRANSFER_MODE_INTERRUPT == index_transfer_mode) - && (I2C_TRANSFER_MODE_DMA == data_transfer_mode) - ) - - || (I2C_TRANSFER_MODE_DMA == index_transfer_mode) - ) - { - return(I2C_UNSUPPORTED_FEATURE); - } - - - /* Check if parameters are valid.*/ - - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - - g_i2c_system_context[id].index_transfer_mode = index_transfer_mode; - - /*Index transfer mode is still relevant even if I2C_NO_INDEX is - used since then this mode is used for the addres transmission */ - - g_i2c_system_context[id].data_transfer_mode = data_transfer_mode; - - /*Disable the interrupts if index tranfer mode is polling */ - if (I2C_TRANSFER_MODE_POLLING == index_transfer_mode) - { - - I2C_DisableIRQSrc((t_i2c_irq_src_id) (((u32) id << (u32) I2CID_SHIFT) | (u32) I2C_IRQ_SRC_ALL)); - - } - - return(I2C_OK); -} - -/****************************************************************************/ -/* NAME : I2C_SetBusControlMode */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Set the bus control mode for the data transfer on the */ -/* given I2C controller. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* t_i2c_bus_control_mode : The mode in which I2C bus */ -/* is accessed */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ - -/****************************************************************************/ - t_i2c_error I2C_SetBusControlMode(t_i2c_device_id id, t_i2c_bus_control_mode bus_control_mode) -{ - - - t_i2c_registers *p_i2c_registers; - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - - /* Check if parameters are valid.*/ - - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - - g_i2c_system_context[id].bus_control_mode = bus_control_mode; - - /* Disable the I2C controller before configuring */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_PE); - - /* Set the Bus control mode */ - I2C_WRITE_FIELD - ( - p_i2c_registers->cr, - I2C_CR_OM, - I2C_CR_SHIFT_OM, - (u32) g_i2c_system_context[id].bus_control_mode - ); - - /* Enable the I2C controller */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - - return(I2C_OK); -} - -/*----------------------------------------------------------------------------- - Configuration functions ------------------------------------------------------------------------------*/ -/****************************************************************************/ -/* NAME : I2C_FlushFifo */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Flush the transmit or receive FIFO */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* t_i2c_fifo : FIFO to be flused */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* = I2C_INVALID_PARAMETER - if input id is wrong */ -/* = I2C_HW_FAILED - if FIFO flush bit is not reset */ -/* itself after setting. This could be happen if */ -/* i2c clock frequency is not set */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ - -/****************************************************************************/ - t_i2c_error I2C_FlushFifo(t_i2c_device_id id, t_i2c_fifo fifo) -{ - - u32 loop_counter; - t_i2c_registers *p_i2c_registers; - - /* Check parameters valid */ - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - switch (fifo) - { - case I2C_TRANSMIT_FIFO: - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_FTX); /* Flush the Tx Fifo */ - - /*Wait till for the Tx Flush bit to reset */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->cr, I2C_CR_FTX, I2C_CR_SHIFT_FTX) - && loop_counter < I2C_FIFO_FLUSH_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_FIFO_FLUSH_COUNTER) - { - return(I2C_HW_FAILED); - } - break; - - case I2C_RECEIVE_FIFO: - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_FRX); /* Flush the Rx Fifo */ - - /* Wait till Rx flush bit to reset */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->cr, I2C_CR_FRX, I2C_CR_SHIFT_FRX) - && loop_counter < I2C_FIFO_FLUSH_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_FIFO_FLUSH_COUNTER) - { - return(I2C_HW_FAILED); - } - break; - } - - return(I2C_OK); - -} - - - - - -/****************************************************************************/ -/* NAME : I2C_Enable */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :Enable the given I2C controller. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_Enable(t_i2c_device_id id) -{ - t_i2c_registers *p_i2c_registers; - - /* Check if parameters are valid.*/ - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - - g_i2c_system_context[id].enabled = TRUE; - return(I2C_OK); -} - -/****************************************************************************/ -/* NAME : I2C_Disable */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :Disble the given I2C controller. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to disabled */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_Disable(t_i2c_device_id id) -{ - t_i2c_registers *p_i2c_registers; - - /* Check if parameters are valid.*/ - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_PE); - - g_i2c_system_context[id].enabled = FALSE; - return(I2C_OK); - -} - - - -/****************************************************************************/ -/* NAME : I2C_WriteSingleData */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :This routine is used to write a single data byte to */ -/* a receiver. Writing can be done to a slave device by */ -/* using the indexed modes. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* u16 : The address of the slave to be accessed */ -/* u16 : The index of the register on the receiver */ -/* to which data is written */ -/* t_unit16 :The format of the index on receiver side */ -/* u8 : The data byte to be written to the slave device */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/* I2C_SLAVE_ADDRESS_NOT_VALID If requested slave address */ -/* is not valid */ -/* I2C_CONTROLLER_BUSY if I2C controller is busy */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_WriteSingleData -( - t_i2c_device_id id, - u16 slave_address, - t_i2c_index_format index_format, - u16 index_value, - u8 data -) -{ - -/* -Steps: - - Check Mode - - Polling - - Interrupt - - DMA -*/ - - volatile u32 mcr = 0; - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - info( - "Id is %d, Address is %x, Index format is %d and value is %d, Data is %d", - id, - slave_address, - index_format, - index_value, - data - ); - - /* Check if parameters are valid.*/ - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - - if (!i2cp_AddressIsValid(slave_address)) - { - return(I2C_SLAVE_ADDRESS_NOT_VALID); - } - - /* Index transfers are only valid in case the Bus Control Mode is not slave*/ - if ((I2C_BUS_MASTER_MODE != g_i2c_system_context[id].bus_control_mode) && (I2C_NO_INDEX != index_format)) - { - return(I2C_INVALID_PARAMETER); - } - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* Check if not busy.*/ - if ((g_i2c_system_context[id].operation != I2C_NO_OPERATION)) - { - return(I2C_CONTROLLER_BUSY); - } - - /* Save parameters.*/ - g_i2c_system_context[id].slave_address = slave_address; - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_MODE; - g_i2c_system_context[id].register_index = index_value; - g_i2c_system_context[id].index_format = index_format; - g_i2c_system_context[id].data = data; - g_i2c_system_context[id].databuffer = NULL; - g_i2c_system_context[id].count_data = 1; - g_i2c_system_context[id].operation = I2C_WRITE; - g_i2c_system_context[id].active_event = I2C_NO_EVENT; - g_i2c_system_context[id].transfer_data = 0; - g_i2c_system_context[id].multi_operation = FALSE; - - /* Disable all the interrupts to remove previously garbage interrupts */ - switch(id) - { - case I2C0 : - I2C_DisableIRQSrc(I2C0_IRQ_SRC_ALL); - break; - case I2C1 : - I2C_DisableIRQSrc(I2C1_IRQ_SRC_ALL); - break; - case I2C2: - I2C_DisableIRQSrc(I2C2_IRQ_SRC_ALL); - break; - case I2C3: - I2C_DisableIRQSrc(I2C3_IRQ_SRC_ALL); - break; - default: - break; - } -/* I2C_DisableIRQSrc((I2C0 == id) ? I2C0_IRQ_SRC_ALL : I2C1_IRQ_SRC_ALL);*/ - - /* Check if I2C controller is Master */ - if (I2C_BUS_MASTER_MODE == g_i2c_system_context[id].bus_control_mode) - { - /* Master control configuration */ - - /* Set the Master write operation */ - I2C_CLR_BIT(mcr, I2C_MCR_OP); - - /* start byte procedure configuration */ - I2C_WRITE_FIELD(mcr, I2C_MCR_SB, I2C_MCR_SHIFT_SB, (u32) g_i2c_system_context[id].start_byte_procedure); - - /* Check the General call handling */ - if (g_i2c_system_context[id].general_call_mode_handling != I2C_NO_GENERAL_CALL_HANDLING) - { - /* The Transaction is intiated by a general call command */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 0); - } - else - { - /* Check if Slave address is 10 bit */ - if (g_i2c_system_context[id].slave_address < 1024 && g_i2c_system_context[id].slave_address > 127) - { - /* Set the Address mode to 10 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 2); - } - else - { - /* Set the Address mode to 7 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 1); - } - } - - /* Store the HS master code */ - if (I2C_FREQ_MODE_HIGH_SPEED == g_i2c_system_context[id].mode) - { - p_i2c_registers->hsmcr = g_i2c_system_context[id].high_speed_master_code; - } - - /* Store the Slave addres in the Master control register */ - I2C_WRITE_FIELD(mcr, I2C_MCR_A10, I2C_MCR_SHIFT_A10, slave_address); - - /* Configure the STOP condition*/ - /* Current transaction is terminated by STOP condition */ - I2C_SET_BIT(mcr, I2C_MCR_STOP); - - /* Configuring the Frame length */ - switch (index_format) - { - case I2C_NO_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 1); - break; - - case I2C_BYTE_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 2); - break; - - case I2C_HALF_WORD_LITTLE_ENDIAN: - case I2C_HALF_WORD_BIG_ENDIAN: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 3); - break; - - default: - break; - } - - /*Write the MCR register */ - p_i2c_registers->mcr = mcr; - - } - - switch (g_i2c_system_context[id].index_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - /* - Index Transfer - */ - if (I2C_BUS_SLAVE_MODE == g_i2c_system_context[id].bus_control_mode) - { - error_status = i2cp_SlaveIndexReceive(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - else - { - error_status = i2cp_MasterIndexTransmit(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - - /* - Data Transfer - */ - switch (g_i2c_system_context[id].data_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - error_status = i2cp_TransmitDataPolling(id, (u8 *) &g_i2c_system_context[id].data); - if (I2C_OK != error_status) - { - return(error_status); - } - - /* Stop Signal to be sent/received for transfer completion*/ - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - break; - } - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - return(I2C_INVALID_PARAMETER); - } - - return(error_status); - -} - -/****************************************************************************/ -/* NAME : I2C_WriteMultipleData */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :This routine is used to write a multiple data byte to */ -/* a receiver. Writing can be done to a slave device by */ -/* using the indexed modes. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* u16 : The address of the slave to be accessed */ -/* u16 : The index of the register on the receiver */ -/* to which data is written */ -/* t_unit16 :The format of the index on receiver side */ -/* u8* : The data buffer to be written to the */ -/* slave device */ -/* t_unit32 : no of bytes to be transfered */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/* I2C_SLAVE_ADDRESS_NOT_VALID If requested slave address */ -/* is not valid */ -/* I2C_CONTROLLER_BUSY if I2C controller is busy */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_WriteMultipleData -( - t_i2c_device_id id, - u16 slave_address, - t_i2c_index_format index_format, - u16 index_value, - u8 *p_data, - u32 count -) -{ - -/* -Steps: - - Check Mode - - Polling - - Interrupt - - DMA -*/ - volatile u32 mcr = 0; - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - info( - "Id is %d, Address is %x, Index format is %d and value is %d, Data count is %d and @ is %p", - id, - slave_address, - index_format, - index_value, - count, - (void *) p_data - ); - - /* Check if parameters are valid.*/ - if (((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) || (NULL == p_data)) - { - return(I2C_INVALID_PARAMETER); - } - - - if (!i2cp_AddressIsValid(slave_address)) - { - return(I2C_SLAVE_ADDRESS_NOT_VALID); - } - - /* Index transfers are only valid in case the Bus Control Mode is not slave*/ - if ((I2C_BUS_MASTER_MODE != g_i2c_system_context[id].bus_control_mode) && (I2C_NO_INDEX != index_format)) - { - return(I2C_INVALID_PARAMETER); - } - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* Check if not busy.*/ - if ((g_i2c_system_context[id].operation != I2C_NO_OPERATION)) - { - return(I2C_CONTROLLER_BUSY); - } - - /* Save parameters.*/ - g_i2c_system_context[id].slave_address = slave_address; - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_MODE; - g_i2c_system_context[id].register_index = index_value; - g_i2c_system_context[id].index_format = index_format; - g_i2c_system_context[id].data = 0; - g_i2c_system_context[id].databuffer = p_data; - g_i2c_system_context[id].count_data = count; - g_i2c_system_context[id].operation = I2C_WRITE; - g_i2c_system_context[id].active_event = I2C_NO_EVENT; - g_i2c_system_context[id].transfer_data = 0; - g_i2c_system_context[id].multi_operation = TRUE; - - /* Disable all the interrupts to remove previously garbage interrupts */ - switch(id) - { - case I2C0 : - I2C_DisableIRQSrc(I2C0_IRQ_SRC_ALL); - break; - case I2C1 : - I2C_DisableIRQSrc(I2C1_IRQ_SRC_ALL); - break; - case I2C2: - I2C_DisableIRQSrc(I2C2_IRQ_SRC_ALL); - break; - case I2C3: - I2C_DisableIRQSrc(I2C3_IRQ_SRC_ALL); - break; - default: - break; - } - /*I2C_DisableIRQSrc((I2C0 == id) ? I2C0_IRQ_SRC_ALL : I2C1_IRQ_SRC_ALL);*/ - - /* Check if I2C controller is Master */ - if (I2C_BUS_MASTER_MODE == g_i2c_system_context[id].bus_control_mode) - { - /* Master control configuration */ - - /* Set the Master write operation */ - I2C_CLR_BIT(mcr, I2C_MCR_OP); - - /* start byte procedure configuration */ - I2C_WRITE_FIELD(mcr, I2C_MCR_SB, I2C_MCR_SHIFT_SB, (u32) g_i2c_system_context[id].start_byte_procedure); - - /* Check the General call handling */ - if (g_i2c_system_context[id].general_call_mode_handling != I2C_NO_GENERAL_CALL_HANDLING) - { - /* The Transaction is intiated by a general call command */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 0); - } - else - { - /* Check if Slave address is 10 bit */ - if (g_i2c_system_context[id].slave_address < 1024 && g_i2c_system_context[id].slave_address > 127) - { - /* Set the Address mode to 10 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 2); - } - else - { - /* Set the Address mode to 7 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 1); - } - } - - /* Store the HS master code */ - if (I2C_FREQ_MODE_HIGH_SPEED == g_i2c_system_context[id].mode) - { - p_i2c_registers->hsmcr = g_i2c_system_context[id].high_speed_master_code; - } - - /* Store the Slave addres in the Master control register */ - I2C_WRITE_FIELD(mcr, I2C_MCR_A10, I2C_MCR_SHIFT_A10, slave_address); - - /* Configure the STOP condition*/ - /* Current transaction is terminated by STOP condition */ - I2C_SET_BIT(mcr, I2C_MCR_STOP); - - /* Configuring the Frame length */ - switch (index_format) - { - case I2C_NO_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, count); - break; - - case I2C_BYTE_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, (count + 1)); - break; - - case I2C_HALF_WORD_LITTLE_ENDIAN: - case I2C_HALF_WORD_BIG_ENDIAN: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, (count + 2)); - break; - - default: - break; - } - - p_i2c_registers->mcr = mcr; - } - - switch (g_i2c_system_context[id].index_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - /* - Index Transfer - */ - if (I2C_BUS_SLAVE_MODE == g_i2c_system_context[id].bus_control_mode) - { - error_status = i2cp_SlaveIndexReceive(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - else - { - error_status = i2cp_MasterIndexTransmit(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - - /* - Data Transfer - */ - switch (g_i2c_system_context[id].data_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - error_status = i2cp_TransmitDataPolling(id, g_i2c_system_context[id].databuffer); - if (I2C_OK != error_status) - { - return(error_status); - } - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - break; - } - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - return(I2C_INVALID_PARAMETER); - } - - return(error_status); - -} - -/****************************************************************************/ -/* NAME : I2C_ReadSingleData */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :This routine is used to read a single data byte from */ -/* a transmitter. Read can be done from a slave device by */ -/* using the indexed modes. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* u16 : The address of the slave to be accessed */ -/* u16 : The index of the register on the transmitter */ -/* from which data is read */ -/* t_unit16 :The format of the index on tranmitter side */ -/* u8 : The data to be read from the tranmitter */ -/* t_unit32 : no of bytes to be transfered */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/* I2C_SLAVE_ADDRESS_NOT_VALID If requested slave address */ -/* is not valid */ -/* I2C_CONTROLLER_BUSY if I2C controller is busy */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_ReadSingleData -( - t_i2c_device_id id, - u16 slave_address, - t_i2c_index_format index_format, - u16 index_value, - u8 *p_data -) -{ - -/* -Steps: - - Check Mode - - Polling - - Interrupt - - DMA -*/ - volatile u32 mcr = 0; - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - info( - "Id is %d, Address is %x, Index format is %d and value is %d, Data count is %d and @ is %p", - id, - slave_address, - index_format, - index_value, - (void *) p_data - ); - - /* Check if parameters are valid.*/ - if (((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) || (NULL == p_data)) - { - return(I2C_INVALID_PARAMETER); - } - - if (!i2cp_AddressIsValid(slave_address)) - { - return(I2C_SLAVE_ADDRESS_NOT_VALID); - } - - /* Index transfers are only valid in case the Bus Control Mode is not slave*/ - if ((I2C_BUS_MASTER_MODE != g_i2c_system_context[id].bus_control_mode) && (I2C_NO_INDEX != index_format)) - { - return(I2C_INVALID_PARAMETER); - } - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* Check if not busy.*/ - if ((g_i2c_system_context[id].operation != I2C_NO_OPERATION)) - { - return(I2C_CONTROLLER_BUSY); - } - - /* Save parameters.*/ - g_i2c_system_context[id].slave_address = slave_address; - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_MODE; - g_i2c_system_context[id].register_index = index_value; - g_i2c_system_context[id].index_format = index_format; - g_i2c_system_context[id].data = 0; - g_i2c_system_context[id].databuffer = p_data; - g_i2c_system_context[id].count_data = 1; - g_i2c_system_context[id].operation = I2C_READ; - g_i2c_system_context[id].active_event = I2C_NO_EVENT; - g_i2c_system_context[id].transfer_data = 0; - g_i2c_system_context[id].multi_operation = FALSE; - - /* Disable all the interrupts to remove previously garbage interrupts */ - switch(id) - { - case I2C0 : - I2C_DisableIRQSrc(I2C0_IRQ_SRC_ALL); - break; - case I2C1 : - I2C_DisableIRQSrc(I2C1_IRQ_SRC_ALL); - break; - case I2C2: - I2C_DisableIRQSrc(I2C2_IRQ_SRC_ALL); - break; - case I2C3: - I2C_DisableIRQSrc(I2C3_IRQ_SRC_ALL); - break; - default: - break; - } - - /*I2C_DisableIRQSrc((id == I2C0) ? I2C0_IRQ_SRC_ALL : I2C1_IRQ_SRC_ALL);*/ - - /* Check if I2C controller is Master */ - if (I2C_BUS_MASTER_MODE == g_i2c_system_context[id].bus_control_mode) - { - - /* start byte procedure configuration */ - I2C_WRITE_FIELD(mcr, I2C_MCR_SB, I2C_MCR_SHIFT_SB, (u32) g_i2c_system_context[id].start_byte_procedure); - - /* Check the General call handling */ - if (g_i2c_system_context[id].general_call_mode_handling != I2C_NO_GENERAL_CALL_HANDLING) - { - /* The Transaction is intiated by a general call command */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 0); - } - else - { - /* Check if Slave address is 10 bit */ - if (g_i2c_system_context[id].slave_address < 1024 && g_i2c_system_context[id].slave_address > 127) - { - /* Set the Address mode to 10 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 2); - } - else - { - /* Set the Address mode to 7 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 1); - } - } - - /* Store the HS master code */ - if (I2C_FREQ_MODE_HIGH_SPEED == g_i2c_system_context[id].mode) - { - p_i2c_registers->hsmcr = g_i2c_system_context[id].high_speed_master_code; - } - - /* Store the Slave addres in the Master control register */ - I2C_WRITE_FIELD(mcr, I2C_MCR_A10, I2C_MCR_SHIFT_A10, slave_address); - - if - ( - (g_i2c_system_context[id].slave_address < 1024 && g_i2c_system_context[id].slave_address > 127) - && (I2C_NO_INDEX == index_format) - ) - { - /* Set the Master write operation */ - I2C_CLR_BIT(mcr, I2C_MCR_OP); - - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 0); - - /* Current transaction is not terminated by STOP condition, - a repeated start operation will be fallowed */ - I2C_CLR_BIT(mcr, I2C_MCR_STOP); - - /*Write MCR register */ - p_i2c_registers->mcr = mcr; - - /* Enable the I2C controller */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - } - else - { - /* Master control configuration */ - if (I2C_NO_INDEX != index_format) - { - /* Set the Master write operation */ - I2C_CLR_BIT(mcr, I2C_MCR_OP); - } - else - { - /* Set the Master read operation */ - I2C_SET_BIT(mcr, I2C_MCR_OP); - } - - /* Configuring the Frame length */ - switch (index_format) - { - case I2C_NO_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 1); - - /* Current transaction is terminated by STOP condition */ - I2C_SET_BIT(mcr, I2C_MCR_STOP); - break; - - case I2C_BYTE_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 1); - - /* Current transaction is not terminated by STOP condition, - a repeated start operation will be fallowed */ - I2C_CLR_BIT(mcr, I2C_MCR_STOP); - break; - - case I2C_HALF_WORD_LITTLE_ENDIAN: - case I2C_HALF_WORD_BIG_ENDIAN: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 2); - - /* Current transaction is not terminated by STOP condition, - a repeated start operation will be fallowed */ - I2C_CLR_BIT(mcr, I2C_MCR_STOP); - break; - - default: - break; - } - - /*Write MCR register */ - p_i2c_registers->mcr = mcr; - - } - } - - switch (g_i2c_system_context[id].index_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - /* - Index Transfer - */ - if (I2C_BUS_SLAVE_MODE == g_i2c_system_context[id].bus_control_mode) - { - error_status = i2cp_SlaveIndexReceive(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - else - { - error_status = i2cp_MasterIndexTransmit(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - - /* - Data Transfer - */ - switch (g_i2c_system_context[id].data_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - error_status = i2cp_ReceiveDataPolling(id, g_i2c_system_context[id].databuffer); - if (I2C_OK != error_status) - { - return(error_status); - } - - /* Stop Signal to be sent/received for transfer completion*/ - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - break; - } - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - return(I2C_INVALID_PARAMETER); - } - - return(error_status); - -} - -/****************************************************************************/ -/* NAME : I2C_ReadMultipleData */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :This routine is used to read a multiple data byte from */ -/* a transmitter. Read can be done from a slave device by */ -/* using the indexed modes. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be initialized */ -/* u16 : The address of the slave to be accessed */ -/* u16 : The index of the register on the transmitter */ -/* from which data is read */ -/* t_unit16 :The format of the index on tranmitter side */ -/* u8* : The data buffer to be written to the */ -/* slave device */ -/* t_unit32 : no of bytes to be transfered */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/* I2C_SLAVE_ADDRESS_NOT_VALID If requested slave address */ -/* is not valid */ -/* I2C_CONTROLLER_BUSY if I2C controller is busy */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_ReadMultipleData -( - t_i2c_device_id id, - u16 slave_address, - t_i2c_index_format index_format, - u16 index_value, - u8 *p_data, - u32 count -) -{ - -/* -Steps: - - Check Mode - - Polling - - Interrupt - - DMA -*/ - volatile u32 mcr = 0; - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - info( - "Id is %d, Address is %x, Index format is %d and value is %d, Data count is %d and @ is %p", - id, - slave_address, - index_format, - index_value, - count, - (void *) p_data - ); - - /* Check if parameters are valid.*/ - if (((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id) ) || (NULL == p_data)) - { - return(I2C_INVALID_PARAMETER); - } - - - if (!i2cp_AddressIsValid(slave_address)) - { - return(I2C_SLAVE_ADDRESS_NOT_VALID); - } - - /* Index transfers are only valid in case the Bus Control Mode is not slave*/ - if ((I2C_BUS_MASTER_MODE != g_i2c_system_context[id].bus_control_mode) && (I2C_NO_INDEX != index_format)) - { - return(I2C_INVALID_PARAMETER); - } - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* Check if not busy.*/ - if ((g_i2c_system_context[id].operation != I2C_NO_OPERATION)) - { - return(I2C_CONTROLLER_BUSY); - } - - /* Save parameters.*/ - g_i2c_system_context[id].slave_address = slave_address; - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_MODE; - g_i2c_system_context[id].register_index = index_value; - g_i2c_system_context[id].index_format = index_format; - g_i2c_system_context[id].data = 0; - g_i2c_system_context[id].databuffer = p_data; - g_i2c_system_context[id].count_data = count; - g_i2c_system_context[id].operation = I2C_READ; - g_i2c_system_context[id].active_event = I2C_NO_EVENT; - g_i2c_system_context[id].transfer_data = 0; - g_i2c_system_context[id].multi_operation = TRUE; - - /* Disable all the interrupts to remove previously garbage interrupts */ - switch(id) - { - case I2C0 : - I2C_DisableIRQSrc(I2C0_IRQ_SRC_ALL); - break; - case I2C1 : - I2C_DisableIRQSrc(I2C1_IRQ_SRC_ALL); - break; - case I2C2: - I2C_DisableIRQSrc(I2C2_IRQ_SRC_ALL); - break; - case I2C3: - I2C_DisableIRQSrc(I2C3_IRQ_SRC_ALL); - break; - default: - break; - } -/* I2C_DisableIRQSrc((I2C0 == id) ? I2C0_IRQ_SRC_ALL : I2C1_IRQ_SRC_ALL);*/ - - /* Check if I2C controller is Master */ - if (I2C_BUS_MASTER_MODE == g_i2c_system_context[id].bus_control_mode) - { - - /* start byte procedure configuration */ - I2C_WRITE_FIELD(mcr, I2C_MCR_SB, I2C_MCR_SHIFT_SB, (u32) g_i2c_system_context[id].start_byte_procedure); - - /* Check the General call handling */ - if (g_i2c_system_context[id].general_call_mode_handling != I2C_NO_GENERAL_CALL_HANDLING) - { - /* The Transaction is intiated by a general call command */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 0); - } - else - { - /* Check if Slave address is 10 bit */ - if (g_i2c_system_context[id].slave_address < 1024 && g_i2c_system_context[id].slave_address > 127) - { - /* Set the Address mode to 10 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 2); - } - else - { - /* Set the Address mode to 7 bit */ - I2C_WRITE_FIELD(mcr, I2C_MCR_AM, I2C_MCR_SHIFT_AM, 1); - } - } - - /* Store the HS master code */ - if (I2C_FREQ_MODE_HIGH_SPEED == g_i2c_system_context[id].mode) - { - p_i2c_registers->hsmcr = g_i2c_system_context[id].high_speed_master_code; - } - - /* Store the Slave addres in the Master control register */ - I2C_WRITE_FIELD(mcr, I2C_MCR_A10, I2C_MCR_SHIFT_A10, slave_address); - - if - ( - (g_i2c_system_context[id].slave_address < 1024 && g_i2c_system_context[id].slave_address > 127) - && (I2C_NO_INDEX == index_format) - ) - { - /* Set the Master write operation */ - I2C_CLR_BIT(mcr, I2C_MCR_OP); - - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 0); - - /* Current transaction is not terminated by STOP condition, - a repeated start operation will be fallowed */ - I2C_CLR_BIT(mcr, I2C_MCR_STOP); - - /*Write MCR register */ - p_i2c_registers->mcr = mcr; - - /* Enable the I2C controller */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - } - else - { - /* Master control configuration */ - if (I2C_NO_INDEX != index_format) - { - /* Set the Master write operation */ - I2C_CLR_BIT(mcr, I2C_MCR_OP); - } - else - { - /* Set the Master read operation */ - I2C_SET_BIT(mcr, I2C_MCR_OP); - } - - /* Configuring the Frame length */ - switch (index_format) - { - case I2C_NO_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, count); - - /* Current transaction is terminated by STOP condition */ - I2C_SET_BIT(mcr, I2C_MCR_STOP); - break; - - case I2C_BYTE_INDEX: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 1); - - /* Current transaction is not terminated by STOP condition, - a repeated start operation will be fallowed */ - I2C_CLR_BIT(mcr, I2C_MCR_STOP); - break; - - case I2C_HALF_WORD_LITTLE_ENDIAN: - case I2C_HALF_WORD_BIG_ENDIAN: - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, 2); - - /* Current transaction is not terminated by STOP condition, - a repeated start operation will be fallowed */ - I2C_CLR_BIT(mcr, I2C_MCR_STOP); - break; - - default: - break; - } - - /*Write MCR register */ - p_i2c_registers->mcr = mcr; - - } - } - - switch (g_i2c_system_context[id].index_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - /* - Index Transfer - */ - if (I2C_BUS_SLAVE_MODE == g_i2c_system_context[id].bus_control_mode) - { - error_status = i2cp_SlaveIndexReceive(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - else - { - error_status = i2cp_MasterIndexTransmit(id); - if (I2C_OK != error_status) - { - return(error_status); - } - } - - /* - Data Transfer - */ - switch (g_i2c_system_context[id].data_transfer_mode) - { - case I2C_TRANSFER_MODE_POLLING: - error_status = i2cp_ReceiveDataPolling(id, g_i2c_system_context[id].databuffer); - if (I2C_OK != error_status) - { - return(error_status); - } - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - break; - } - break; - - case I2C_TRANSFER_MODE_INTERRUPT: - case I2C_TRANSFER_MODE_DMA: - default: - return(I2C_INVALID_PARAMETER); - } - - return(error_status); - -} - -/****************************************************************************/ -/* NAME : I2C_Cancel */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : This routine is used to cancel the current transfer */ -/* operation, if any. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller to be canceled */ -/* InOut : None */ -/* : t_i2c_active_event: It will contain the result of */ -/* the operation */ -/* */ -/* RETURN : t_i2c_error */ -/* I2C_OK if it is ok */ -/* I2C_INVALID_PARAMETER if input parameters are not valid */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_i2c_error I2C_Cancel(t_i2c_device_id id, t_i2c_active_event *event) /*Only IT mode*/ -{ - /* Check if parameters are valid.*/ - if ((NULL == event) || ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id))) - { - return(I2C_INVALID_PARAMETER); - } - - if (I2C_NO_EVENT == g_i2c_system_context[id].active_event) - { - event->type = I2C_NO_EVENT; - event->transfer_data = 0; - event->id = id; - } - else - { - event->type = I2C_CANCEL_EVENT; - event->transfer_data = g_i2c_system_context[id].transfer_data; - event->id = id; - g_i2c_system_context[id].active_event = I2C_CANCEL_EVENT; - } - - i2cp_Abort(id); - - /*Set the I2C operation to No operation */ - g_i2c_system_context[id].operation = (t_i2c_operation) I2C_NO_OPERATION; - - return(I2C_OK); -} - - - -/****************************************************************************/ -/* NAME : I2C_IsEventActive */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :This routine is used to determine if the given event */ -/* is still active. */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_active_event: the Event to be checked */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_bool : TRUE or FALSE */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ - t_bool I2C_IsEventActive(t_i2c_active_event *event) -{ - if (event->type == g_i2c_system_context[event->id].active_event) - { - return(TRUE); - } - else - { - return(FALSE); - } -} - - -/****************************************************************************/ -/* NAME : I2C_Reset */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION :Reset the I2C Registers for given I2C controller */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The ID of the controller for reset */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/* return I2C_INVALID_PARAMETER if id is not correct */ -/* else I2C_OK */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ -/****************************************************************************/ -t_i2c_error I2C_Reset(t_i2c_device_id id) -{ - t_i2c_registers *p_i2c_registers; - - /* Check if parameters are valid.*/ - if ((I2C0 != id) && (I2C1 != id) && (I2C2 != id) && (I2C3 != id)) - { - return(I2C_INVALID_PARAMETER); - } - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - - /* Clear registers.*/ - I2C_WRITE_REG(p_i2c_registers->cr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->scr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->hsmcr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->mcr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->tftr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->rftr, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->dmar, I2C_CLEAR); - I2C_WRITE_REG(p_i2c_registers->icr, 0x31F0008); - I2C_WRITE_REG(p_i2c_registers->imscr,I2C_CLEAR); - - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_FTX); /* Flush the Tx Fifo */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_FRX); /* Flush the Rx Fifo */ - - /* - Initialize the right structure to default state - */ - g_i2c_system_context[id].freq_scl = 0; - g_i2c_system_context[id].freq_input = 0; - g_i2c_system_context[id].mode = I2C_FREQ_MODE_STANDARD; - g_i2c_system_context[id].own_address = 0; - g_i2c_system_context[id].enabled = FALSE; - g_i2c_system_context[id].slave_address = 0; - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_MODE; - g_i2c_system_context[id].data = 0; - g_i2c_system_context[id].databuffer = NULL; - g_i2c_system_context[id].count_data = 0; - g_i2c_system_context[id].register_index = 0; - g_i2c_system_context[id].operation = (t_i2c_operation) I2C_NO_OPERATION; - g_i2c_system_context[id].active_event = I2C_NO_EVENT; - g_i2c_system_context[id].transfer_data = 0; - g_i2c_system_context[id].multi_operation = FALSE; - - /* g_i2c_system_context[id].i2c_device_context... to be initialized*/ - g_i2c_system_context[id].digital_filter_control = I2C_DIGITAL_FILTERS_OFF; - g_i2c_system_context[id].dma_sync_logic_control = I2C_DISABLE; - g_i2c_system_context[id].start_byte_procedure = I2C_DISABLE; - g_i2c_system_context[id].slave_data_setup_time = 0; /* TBD */ - g_i2c_system_context[id].high_speed_master_code = 0; - g_i2c_system_context[id].bus_control_mode = I2C_BUS_SLAVE_MODE; - g_i2c_system_context[id].i2c_loopback_mode = I2C_DISABLE; - g_i2c_system_context[id].general_call_mode_handling = I2C_NO_GENERAL_CALL_HANDLING; - - g_i2c_system_context[id].index_transfer_mode = I2C_TRANSFER_MODE_POLLING; - g_i2c_system_context[id].data_transfer_mode = I2C_TRANSFER_MODE_POLLING; - g_i2c_system_context[id].i2c_transmit_interrupt_threshold = 1; - g_i2c_system_context[id].i2c_receive_interrupt_threshold = 1; - g_i2c_system_context[id].transmit_burst_length = 0; - g_i2c_system_context[id].receive_burst_length = 0; - g_i2c_system_context[id].index_format = I2C_NO_INDEX; - g_i2c_system_context[id].current_bus_config = I2C_CURRENT_BUS_SLAVE_TRANSMITTER; - g_i2c_system_context[id].std =FALSE; - - return(I2C_OK); -} - -/*----------------------------------------------------------------------------- - Private functions ------------------------------------------------------------------------------*/ - -/*----------------------------------------------------------------------------- -Name : i2cp_SetOwnAddress -Description : Set the I2C bus address of the controller. -In : t_i2c_registers* p_i2c_registers : pointer to the controller's - registers. - u32 address : the slave address of the - controller. -InOut : None -Out : None -Return value: Always ok / I2C_SLAVE_ADDRESS_NOT_VALID -Type : Private -Comments : - - - In all cases, the bits are not cleared when the interface is disabled - (PE = 0b). ------------------------------------------------------------------------------*/ - t_i2c_error i2cp_SetOwnAddress(t_i2c_device_id id, u16 address) -{ - t_i2c_registers *p_i2c_registers; - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* CM: check if the given address is valid ???*/ - if (!i2cp_AddressIsValid(address)) - { - return(I2C_SLAVE_ADDRESS_NOT_VALID); - } - - if (address < 1024 && address > 127) - { - /* Set Slave address mode to 10 bit addressing mode */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_SAM); - I2C_WRITE_FIELD(p_i2c_registers->scr, I2C_SCR_ADDR, I2C_SCR_SHIFT_ADDR, address); - } - else - { - /* Set the slave address mode to 7 bit addressing mode */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_SAM); - I2C_WRITE_FIELD(p_i2c_registers->scr, I2C_SCR_ADDR, I2C_SCR_SHIFT_ADDR, address); - } - - return(I2C_OK); -} - -/*----------------------------------------------------------------------------- -Name : i2cp_SetBusClock -Description : Set the I2C bus clock for the given controller. -In : t_i2c_registers* p_i2c_registers : pointer to the controller's - registers. - u32 freq_scl : the I2C bus frequency freq_scl (Hz). - u32 freq_input : the input clock frequency (Hz). -InOut : None -Out : None -Return value: I2C_OK : no error. - I2C_INVALID_PARAMETER : wrong id parameter. - I2C_freq_scl_NOT_SUPPORTED : freq_scl is not supported. -Type : Private -Comments : The freq_input parameter is only necessary to calculate the I2C bus - frequency and is not used for other purposes. - It is not necessary to save the freq_scl as it has been already - saved by I2C_Config(). - ------------------------------------------------------------------------------*/ -t_i2c_error i2cp_SetBusClock(t_i2c_device_id id, u32 freq_scl, u32 freq_input) -{ - - - /* To be defined */ - u32 value; - t_i2c_registers *p_i2c_registers; - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - /* Standard mode */ - if (freq_scl <= (u32) I2C_MAX_STANDARD_SCL) - { - value = (u32) (freq_input / (freq_scl * 2)); - - /*Set the Standard mode in the control register */ - I2C_WRITE_FIELD(p_i2c_registers->cr, I2C_CR_SM, I2C_CR_SHIFT_SM, 0x0); - - /* set the Baud rate counter 2 value */ - I2C_WRITE_FIELD(p_i2c_registers->brcr, I2C_BRCR_BRCNT2, I2C_BRCR_SHIFT_BRCNT2, value); - - /* Make ensure that BRCNT value set to be zero */ - I2C_WRITE_FIELD(p_i2c_registers->brcr, I2C_BRCR_BRCNT1, I2C_BRCR_SHIFT_BRCNT1, 0); - - /*Update the Frequency mode in the global strcture */ - g_i2c_system_context[id].mode = I2C_FREQ_MODE_STANDARD; - } - else /* Fast Mode */ - if (freq_scl <= (u32) I2C_MAX_FAST_SCL) - { - value = (u32) (freq_input / ((freq_scl * 3) / 2)); - - /*Set the Fast mode in the control register */ - I2C_WRITE_FIELD(p_i2c_registers->cr, I2C_CR_SM, I2C_CR_SHIFT_SM, 0x1); - - /* set the Baud rate counter 2 value */ - I2C_WRITE_FIELD(p_i2c_registers->brcr, I2C_BRCR_BRCNT2, I2C_BRCR_SHIFT_BRCNT2, value); - - /* Make ensure that BRCNT value set to be zero */ - I2C_WRITE_FIELD(p_i2c_registers->brcr, I2C_BRCR_BRCNT1, I2C_BRCR_SHIFT_BRCNT1, 0); - - /*Update the Frequency mode in the global strcture */ - g_i2c_system_context[id].mode = I2C_FREQ_MODE_FAST; - } - else /* High Speed Mode */ - if (freq_scl <= (u32) I2C_MAX_HIGH_SPEED_SCL) - { - value = (u32) (freq_input / ((freq_scl * 3) / 2)); - - /*Set the High speed mode in the control register */ - I2C_WRITE_FIELD(p_i2c_registers->cr, I2C_CR_SM, I2C_CR_SHIFT_SM, 0x2); - - /* set the Baud rate counter 1 value */ - I2C_WRITE_FIELD(p_i2c_registers->brcr, I2C_BRCR_BRCNT1, I2C_BRCR_SHIFT_BRCNT1, value); - - /*Update the Frequency mode in the global strcture */ - g_i2c_system_context[id].mode = I2C_FREQ_MODE_HIGH_SPEED; - } - else - { - return(I2C_LINE_FREQ_NOT_SUPPORTED); - } - - return(I2C_OK); - -} - -/*----------------------------------------------------------------------------- -Name : i2cp_AddressIsValid -Description : Check if the given address is valid. -In : u16 address : the slave address to be checked. -InOut : None -Out : None -Return value: TRUE : address is valid. - FALSE : address is not valid. -Type : Private -Comments : Note that the least-significant bit of the address parameter - is not relevant for the addressing of the slave device, for - example 0xE2 and 0xE3 will address the same slave device. - - - Reserved addresses: - SLAVE ADDRESS R/W BIT RANGE DESCRIPTION - 0000 000 0 0 General call address - 0000 000 1 1 START byte(1) - 0000 001 X 2-3 CBUS address(2) - 0000 010 X 4-5 Reserved for different bus format(3) - 0000 011 X 6-7 Reserved for future purposes - 0000 1XX X 8-15 Hs-mode master code - - 1111 1XX X 248-255 Reserved for future purposes - 1111 0XX X 240-247 10-bit slave addressing - - Note that with 7-bit address: - 0000xxxx and 1111xxxx are reserved. ------------------------------------------------------------------------------*/ -t_bool i2cp_AddressIsValid(u16 address) -{ - /* Check if more than 10 bits are needed.*/ - if (address > 1023) - { - return(FALSE); - } - - /* 7-bit address. LSB is not considered.*/ - /*Address 0x4 is enabled to support the ST Pepper pot camera */ - if (address < 128 && !(address == 0 || address == 0x4)) - { - if ((address < 8) || (address > 119)) - { - return(FALSE); - } - } - - /* CM: add here the 10-bit check.*/ - return(TRUE); -} - - -/*----------------------------------------------------------------------------- -Name : i2cp_Abort -Description : Abort the current transfer operation of the given controller. -In : t_i2c_device_id id : the controller to be aborted. -InOut : None -Out : None -Return : I2C_OK : always no error. -Type : Private -Comments : This is called when an unexpected event happens (internal error). ------------------------------------------------------------------------------*/ -void i2cp_Abort(t_i2c_device_id id) -{ - - t_i2c_registers *p_i2c_registers; - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - /*Disable the interrupts */ - I2C_WRITE_REG(p_i2c_registers->imscr,I2C_CLEAR); - - /*Disable the Controller */ - I2C_CLR_BIT(p_i2c_registers->cr, I2C_CR_PE); - - /*Enable the controller */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_PE); - - /*Set the I2C operation to No operation */ - g_i2c_system_context[id].operation = (t_i2c_operation) I2C_NO_OPERATION; -} - - - -/*----------------------------------------------------------------------------- -Name : i2cp_SlaveIndexReceive -Description : -In : t_i2c_id : I2C Controller id - -InOut : None -Out : t_i2c_error error status -Return value: I2C_OK : no error - I2C_INVALID_PARAMETER : wrong id parameter. - -Type : Private -Comments : This function perform the operations, when - I2C controller addressed as a slave ------------------------------------------------------------------------------*/ -t_i2c_error i2cp_SlaveIndexReceive(t_i2c_device_id id) -{ - - u32 loop_counter = 0; - t_i2c_registers *p_i2c_registers; - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - if (I2C_WRITE == g_i2c_system_context[id].operation) - { - /* SLAVE TRANSMITTER */ - /* Waiting for the Read from slave request */ - loop_counter = 0; - while - ( - (!I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_RFSR, I2C_INT_SHIFT_RFSR)) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - i2cp_Abort(id); - return(I2C_ADDRESS_MATCH_FAILED); - } - - /* Acknowledge the Read from slave request */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_RFSR); - - /* Read from slave request recieved */ - /* Flush the Tx Fifo */ - I2C_SET_BIT(p_i2c_registers->cr, I2C_CR_FTX); - - /*Wait till for the Tx Flush bit to reset */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->cr, I2C_CR_FTX, I2C_CR_SHIFT_FTX) - && loop_counter < I2C_FIFO_FLUSH_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_FIFO_FLUSH_COUNTER) - { - return(I2C_HW_FAILED); - } - - /* update the status */ - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_TRANSMITTER_MODE; - g_i2c_system_context[id].active_event = I2C_READ_FROM_SLAVE_REQUEST_EVENT; - g_i2c_system_context[id].current_bus_config = I2C_CURRENT_BUS_SLAVE_TRANSMITTER; - - } - else - { - /* SLAVE RECEIVER */ - /* Waiting for the Write to slave request */ - loop_counter = 0; - while - ( - (!I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_WTSR, I2C_INT_SHIFT_WTSR)) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - i2cp_Abort(id); - return(I2C_ADDRESS_MATCH_FAILED); - } - - /* Acknowledge the Write to slave request */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_WTSR); - - /* update the status */ - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_TRANSMITTER_MODE; - g_i2c_system_context[id].active_event = I2C_WRITE_TO_SLAVE_REQUEST_EVENT; - g_i2c_system_context[id].current_bus_config = I2C_CURRENT_BUS_SLAVE_RECEIVER; - - } - - /* Update the status of the I2C controller */ - if (I2C_READ == g_i2c_system_context[id].operation) - { - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_RECEIVER_MODE; - } - else - { - g_i2c_system_context[id].status = I2C_STATUS_SLAVE_TRANSMITTER_MODE; - } - - return(I2C_OK); -} - -/*----------------------------------------------------------------------------- -Name : i2cp_TransmitDataPolling -Description : Transmit the data in the polling mode -In : t_i2c_id : I2C Controller id - -InOut : None -Out : t_i2c_error error status -Return value: I2C_OK : no error - I2C_INVALID_PARAMETER : wrong id parameter. - -Type : Private -Comments : ------------------------------------------------------------------------------*/ -t_i2c_error i2cp_TransmitDataPolling(t_i2c_device_id id, volatile u8 *p_data) -{ - - u32 loop_counter = 0; - t_i2c_registers *p_i2c_registers; - t_i2c_error error_status; - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - if (I2C_BUS_SLAVE_MODE == g_i2c_system_context[id].bus_control_mode) - { - /* Slave tranmitter */ - while (g_i2c_system_context[id].count_data != 0) - { - /* Check for Tx Fifo not full */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_TXFF, I2C_INT_SHIFT_TXFF) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - return(I2C_TRANSMIT_FIFO_FULL); - } - } - - p_i2c_registers->tfr = *p_data; - - g_i2c_system_context[id].transfer_data++; - g_i2c_system_context[id].count_data--; - p_data++; - g_i2c_system_context[id].active_event = I2C_DATA_TX_EVENT; - } - - /* End of Data transfer */ - /* Check for the Slave tranaction done */ - loop_counter = 0; - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_STD, I2C_INT_SHIFT_STD) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_INTERNAL_ERROR); - } - - /* Slave Transaction has been done */ - /* Acknowledge the Slave Transaction done */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_STD); - - g_i2c_system_context[id].active_event = I2C_TRANSFER_OK_EVENT; - return(I2C_OK); - } - else - { - /* Master Transmitter */ - while (g_i2c_system_context[id].count_data != 0) - { - /* Check for Tx Fifo not full */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_TXFF, I2C_INT_SHIFT_TXFF) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_TRANSMIT_FIFO_FULL); - } - - p_i2c_registers->tfr = *p_data; - - g_i2c_system_context[id].transfer_data++; - g_i2c_system_context[id].count_data--; - p_data++; - g_i2c_system_context[id].active_event = I2C_DATA_TX_EVENT; - } - - /* End of Data transfer */ - - loop_counter = 0; - /* Check whether the Stop bit has been programmed or not */ - if(I2C_READ_FIELD(p_i2c_registers->mcr, I2C_MCR_STOP, I2C_MCR_SHIFT_STOP)) - { - /* Check for the Master transaction Done */ - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_MTD, I2C_INT_SHIFT_MTD) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - } - else - { - /* Check for the Master transaction Done Without Stop */ - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_MTDWS, I2C_INT_SHIFT_MTDWS) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - } - - - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - i2cp_Abort(id); - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_INTERNAL_ERROR); - } - - - /* Master Transaction has been done */ - /* Acknowledge the Master Transaction Done */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_MTD); - - /* Master Transaction Without Stop has been done */ - /* Acknowledge the Master Transaction Done Without Stop */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_MTDWS); - - - g_i2c_system_context[id].active_event = I2C_TRANSFER_OK_EVENT; - - g_i2c_system_context[id].operation = I2C_NO_OPERATION; - return(I2C_OK); - } - -} - -/*----------------------------------------------------------------------------- -Name : i2cp_ReceiveDataPolling -Description : Receiving the data in polling mode -In : t_i2c_id : I2C Controller id - -InOut : None -Out : t_i2c_error error status -Return value: I2C_OK : no error - I2C_WRONG_PARAMETER : wrong id parameter. - -Type : Private -Comments : ------------------------------------------------------------------------------*/ -t_i2c_error i2cp_ReceiveDataPolling(t_i2c_device_id id, u8 *p_data) -{ - - u32 loop_counter = 0; - t_i2c_error error_status; - t_i2c_registers *p_i2c_registers; - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - if (I2C_BUS_SLAVE_MODE == g_i2c_system_context[id].bus_control_mode) - { - /* Slave Receiver */ - while (g_i2c_system_context[id].count_data != 0) - { - /* Wait for the Rx Fifo empty */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_RXFE, I2C_INT_SHIFT_RXFE) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_RECEIVE_FIFO_EMPTY); - } - - /* Read the data byte from Rx Fifo */ - *p_data = (u8) p_i2c_registers->rfr; - - g_i2c_system_context[id].transfer_data++; - g_i2c_system_context[id].count_data--; - p_data++; - g_i2c_system_context[id].active_event = I2C_DATA_RX_EVENT; - } /* Data Reception has been completed */ - - /* Check for the slave transaction done */ - loop_counter = 0; - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_STD, I2C_INT_SHIFT_STD) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_INTERNAL_ERROR); - } - - /* Slave Transaction has been done */ - /* Acknowledge the Slave Transaction Done */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_STD); - g_i2c_system_context[id].active_event = I2C_TRANSFER_OK_EVENT; - g_i2c_system_context[id].operation = I2C_NO_OPERATION; - - return(I2C_OK); - } - else - { - /* Master Receiver */ - while (g_i2c_system_context[id].count_data != 0) - { - /* Wait for the Rx Fifo empty */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_RXFE, I2C_INT_SHIFT_RXFE) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_RECEIVE_FIFO_EMPTY); - } - - /* Read the data byte from Rx Fifo */ - *p_data = (u8) p_i2c_registers->rfr; - - g_i2c_system_context[id].transfer_data++; - g_i2c_system_context[id].count_data--; - p_data++; - g_i2c_system_context[id].active_event = I2C_DATA_RX_EVENT; - } /* Data reception has been completed */ - - loop_counter = 0; - /* Check whether the Stop bit has been programmed or not */ - if(I2C_READ_FIELD(p_i2c_registers->mcr, I2C_MCR_STOP, I2C_MCR_SHIFT_STOP)) - { - /* Check for the Master transaction Done */ - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_MTD, I2C_INT_SHIFT_MTD) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - } - else - { - /* Check for the Master transaction Done Without Stop */ - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_MTDWS, I2C_INT_SHIFT_MTDWS) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - } - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_INTERNAL_ERROR); - } - - /* Master Transaction has been done */ - /* Acknowledge the Master Transaction Done */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_MTD); - - /* Master Transaction Without Stop has been done */ - /* Acknowledge the Master Transaction Done Without Stop */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_MTDWS); - - g_i2c_system_context[id].active_event = I2C_TRANSFER_OK_EVENT; - g_i2c_system_context[id].operation = I2C_NO_OPERATION; - - } - - return(I2C_OK); -} - -/*----------------------------------------------------------------------------- -Name : i2cp_MasterIndexTransmit -Description : Transmits the index to slave -In : t_i2c_id : I2C Controller id - -InOut : None -Out : t_i2c_error error status -Return value: I2C_OK : no error - I2C_WRONG_PARAMETER : wrong id parameter. - -Type : Private -Comments : ------------------------------------------------------------------------------*/ -t_i2c_error i2cp_MasterIndexTransmit(t_i2c_device_id id) -{ - - volatile u32 mcr = 0; - u32 loop_counter = 0; - t_i2c_error error_status = I2C_OK; - t_i2c_registers *p_i2c_registers; - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - switch (g_i2c_system_context[id].index_format) - { - case I2C_NO_INDEX: - if (g_i2c_system_context[id].slave_address <= 127) - { - return(I2C_OK); - } - - break; - - case I2C_BYTE_INDEX: - /* Checking for the Tx fifo not full */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_TXFF, I2C_INT_SHIFT_TXFF) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_TRANSMIT_FIFO_FULL); - } - - p_i2c_registers->tfr = (0xFF & g_i2c_system_context[id].register_index); - - g_i2c_system_context[id].active_event = I2C_INDEX_TX_EVENT; - g_i2c_system_context[id].index_format = I2C_NO_INDEX; - - break; - - case I2C_HALF_WORD_LITTLE_ENDIAN: - /* Checking for the Tx Fifo not full */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_TXFF, I2C_INT_SHIFT_TXFF) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_TRANSMIT_FIFO_FULL); - } - - p_i2c_registers->tfr = (0xFF & (u32) g_i2c_system_context[id].register_index); - - p_i2c_registers->tfr = (g_i2c_system_context[id].register_index >> 8); - - g_i2c_system_context[id].index_format = I2C_NO_INDEX; - g_i2c_system_context[id].active_event = I2C_INDEX_TX_EVENT; - break; - - case I2C_HALF_WORD_BIG_ENDIAN: - /* Cheking for the Tx Fifo full */ - loop_counter = 0; - while - ( - I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_TXFF, I2C_INT_SHIFT_TXFF) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_TRANSMIT_FIFO_FULL); - } - - p_i2c_registers->tfr = (g_i2c_system_context[id].register_index >> 8); - - p_i2c_registers->tfr = (0xFF & g_i2c_system_context[id].register_index); - - g_i2c_system_context[id].index_format = I2C_NO_INDEX; - g_i2c_system_context[id].active_event = I2C_INDEX_TX_EVENT; - break; - - default: - break; - } - - if (g_i2c_system_context[id].operation == I2C_READ) - { - loop_counter = 0; - /* Check whether the Stop bit has been programmed or not */ - if(I2C_READ_FIELD(p_i2c_registers->mcr, I2C_MCR_STOP, I2C_MCR_SHIFT_STOP)) - { - /* Check for the Master transaction Done */ - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_MTD, I2C_INT_SHIFT_MTD) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - } - else - { - /* Check for the Master transaction Done Without Stop */ - while - ( - !I2C_READ_FIELD(p_i2c_registers->risr, I2C_INT_MTDWS, I2C_INT_SHIFT_MTDWS) - && loop_counter < I2C_ENDAD_COUNTER - ) - { - loop_counter++; - }; - } - - if (loop_counter >= I2C_ENDAD_COUNTER) - { - error_status = i2cp_GetAbortCause(id); - if (error_status != I2C_OK) - { - return(error_status); - } - else - { - i2cp_Abort(id); - } - - return(I2C_INTERNAL_ERROR); - } - - /* Master Transaction has been done */ - /* Acknowledge the Master Transaction Done */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_MTD); - - /* Master Transaction Without Stop has been done */ - /* Acknowledge the Master Transaction Done Without Stop */ - I2C_SET_BIT(p_i2c_registers->icr, I2C_INT_MTDWS); - - /* Master control configuration for read operation */ - I2C_SET_BIT(mcr, I2C_MCR_OP); - - /* Configure the STOP condition*/ - I2C_SET_BIT(mcr, I2C_MCR_STOP); - - /* Configuring the Frame length */ - I2C_WRITE_FIELD(mcr, I2C_MCR_LENGTH, I2C_MCR_SHIFT_LENGTH, g_i2c_system_context[id].count_data); - - I2C_WRITE_FIELD(p_i2c_registers->mcr,I2C_MCR_LENGTH_STOP_OP,I2C_MCR_SHIFT_LENGTH_STOP_OP,mcr); - - } - - /* added to remove the warning unused variable */ - error_status = error_status; - - /* Update the status of the I2C controller */ - if (I2C_READ == g_i2c_system_context[id].operation) - { - g_i2c_system_context[id].status = I2C_STATUS_MASTER_RECEIVER_MODE; - } - else - { - g_i2c_system_context[id].status = I2C_STATUS_MASTER_TRANSMITTER_MODE; - } - - return(I2C_OK); -} - - -/* Private function valid for HS controller */ - - -/****************************************************************************/ -/* NAME : i2cp_GetAbortCause */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Get the abort Cause */ -/* */ -/* PARAMETERS : */ -/* : t_i2c_device_id : The controller that aborted */ -/* InOut : None */ -/* : None */ -/* */ -/* RETURN : t_i2c_error */ -/*--------------------------------------------------------------------------*/ -/* Type : */ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES : */ - -/****************************************************************************/ -t_i2c_error i2cp_GetAbortCause(t_i2c_device_id id) -{ - u8 abort_cause; - t_i2c_error error_status; - - t_i2c_registers *p_i2c_registers; - - p_i2c_registers = (t_i2c_registers *) g_i2c_system_context[id].base_address; - - if (I2C_READ_FIELD(p_i2c_registers->sr, I2C_SR_STATUS, I2C_SR_SHIFT_STATUS) == 3) - { - abort_cause = (u8) I2C_READ_FIELD(p_i2c_registers->sr, I2C_SR_CAUSE, I2C_SR_SHIFT_CAUSE); - - switch (abort_cause) - { - case 0: - error_status = I2C_ACK_FAIL_ON_ADDRESS; - break; - - case 1: - error_status = I2C_ACK_FAIL_ON_DATA; - break; - - case 2: - error_status = I2C_ACK_IN_HS_MODE; - break; - - case 3: - error_status = I2C_ARBITRATION_LOST; - break; - - case 4: - error_status = I2C_BUS_ERROR_DETECTED_START; - break; - - case 5: - error_status = I2C_BUS_ERROR_DETECTED_STOP; - break; - - case 6: - error_status = I2C_OVERFLOW; - break; - - default: - error_status = I2C_INTERNAL_ERROR; - break; - } - - return(error_status); - } - - return(I2C_OK); -} - - -/****************************************************************************/ -/* NAME : I2C_SetBaseAddress */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : This routine initializes I2C register base address. */ -/* */ -/* PARAMETERS : */ -/* IN : id : I2C controller id */ -/* i2c_base_address : I2C registers base address */ -/* OUT : None */ -/* */ -/* RETURN : None */ -/*--------------------------------------------------------------------------*/ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES: */ -/* 1) Global variable gp_registers (register base address) */ -/* is being modified */ - -/****************************************************************************/ -void I2C_SetBaseAddress(t_i2c_device_id id, t_logical_address address) -{ - /* Initializing the I2C controller base address */ - gp_i2c_registers[id] = (t_i2c_registers *) address; -} - -/****************************************************************************/ -/* NAME : I2C_DisableIRQSrc */ -/*--------------------------------------------------------------------------*/ -/* DESCRIPTION : Disable the given I2C controller to generate interrupts. */ -/* */ -/* PARAMETERS : */ -/* IN : t_i2c_irq_src_id id : the IRQ source to be disabled. */ -/* OUT : None */ -/* */ -/* RETURN : None */ -/*--------------------------------------------------------------------------*/ -/* REENTRANCY : Non Re-entrant */ -/* REENTRANCY ISSUES: */ - -/****************************************************************************/ -void I2C_DisableIRQSrc(t_i2c_irq_src_id irq_id) -{ - - gp_i2c_registers[GETDEVICE((u32)irq_id)]->imscr &= ~((u32)I2C_IRQ_SRC_ALL & (u32)irq_id); - -} |