qup.h

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/* SPDX-License-Identifier: BSD-3-Clause */
 
#ifndef __QUP_H__
#define __QUP_H__
 
#include <soc/gsbi.h>
 
/* QUP block registers */
#define QUP_CONFIG                      0x0
#define QUP_STATE                       0x4
#define QUP_IO_MODES                    0x8
#define QUP_SW_RESET                    0xc
#define QUP_TIME_OUT                    0x10
#define QUP_TIME_OUT_CURRENT            0x14
#define QUP_OPERATIONAL                 0x18
#define QUP_ERROR_FLAGS                 0x1c
#define QUP_ERROR_FLAGS_EN              0x20
#define QUP_TEST_CTRL                   0x24
#define QUP_MX_OUTPUT_COUNT             0x100
#define QUP_MX_OUTPUT_CNT_CURRENT       0x104
#define QUP_OUTPUT_DEBUG                0x108
#define QUP_OUTPUT_FIFO_WORD_CNT        0x10c
#define QUP_OUTPUT_FIFO                 0x110
#define QUP_MX_WRITE_COUNT              0x150
#define QUP_WRITE_CNT_CURRENT           0x154
#define QUP_MX_INPUT_COUNT              0x200
#define QUP_READ_COUNT                  0x208
#define QUP_MX_READ_CNT_CURRENT         0x20c
#define QUP_INPUT_DEBUG                 0x210
#define QUP_INPUT_FIFO_WORD_CNT         0x214
#define QUP_INPUT_FIFO                  0x218
#define QUP_I2C_MASTER_CLK_CTL          0x400
#define QUP_I2C_MASTER_STATUS           0x404
 
#define OUTPUT_FIFO_FULL                (1<<6)
#define INPUT_FIFO_NOT_EMPTY            (1<<5)
#define OUTPUT_FIFO_NOT_EMPTY           (1<<4)
#define INPUT_SERVICE_FLAG              (1<<9)
#define OUTPUT_SERVICE_FLAG             (1<<8)
#define QUP_OUTPUT_BIT_SHIFT_EN         (1<<16)
 
#define QUP_MODE_MASK                   (0x03)
#define QUP_OUTPUT_MODE_SHFT            (10)
#define QUP_INPUT_MODE_SHFT             (12)
 
#define QUP_FS_DIVIDER_MASK             (0xFF)
 
#define QUP_MINI_CORE_PROTO_SHFT        (8)
#define QUP_MINI_CORE_PROTO_MASK        (0x0F)
 
/* Mini-core states */
#define QUP_STATE_RESET                 0x0
#define QUP_STATE_RUN                   0x1
#define QUP_STATE_PAUSE                 0x3
#define QUP_STATE_VALID                 (1<<2)
#define QUP_STATE_MASK                  0x3
#define QUP_STATE_VALID_MASK            (1<<2)
 
/* Tags for output FIFO */
#define QUP_I2C_1CLK_NOOP_SEQ   0x1     /*MSB 8-bit NOP, LSB 8-bits 1 clk.*/
#define QUP_I2C_START_SEQ               (0x1 << 8)
#define QUP_I2C_DATA_SEQ                (0x2 << 8)
#define QUP_I2C_STOP_SEQ                (0x3 << 8)
#define QUP_I2C_RECV_SEQ                (0x4 << 8)
 
/* Tags for input FIFO */
#define QUP_I2C_MIDATA_SEQ              (0x5 << 8)
#define QUP_I2C_MISTOP_SEQ              (0x6 << 8)
#define QUP_I2C_MINACK_SEQ              (0x7 << 8)
 
#define QUP_I2C_ADDR(x)                 ((x & 0xFF) << 1)
#define QUP_I2C_DATA(x)                 (x & 0xFF)
#define QUP_I2C_MI_TAG(x)               (x & 0xFF00)
#define QUP_I2C_SLAVE_READ              (0x1)
 
/*Bit vals for I2C_MASTER_CLK_CTL register */
#define QUP_HS_DIVIDER_SHFT             (8)
#define QUP_DIVIDER_MIN_VAL             (0x3)
 
/* Bit masks for I2C_MASTER_STATUS register */
#define QUP_I2C_INVALID_READ_SEQ        (1 << 25)
#define QUP_I2C_INVALID_READ_ADDR       (1 << 24)
#define QUP_I2C_INVALID_TAG             (1 << 23)
#define QUP_I2C_FAILED_MASK             (0x3 << 6)
#define QUP_I2C_INVALID_WRITE           (1 << 5)
#define QUP_I2C_ARB_LOST                (1 << 4)
#define QUP_I2C_PACKET_NACK             (1 << 3)
#define QUP_I2C_BUS_ERROR               (1 << 2)
 
typedef enum {
        QUP_SUCCESS = 0,
        QUP_ERR_BAD_PARAM,
        QUP_ERR_STATE_SET,
        QUP_ERR_TIMEOUT,
        QUP_ERR_UNSUPPORTED,
        QUP_ERR_I2C_FAILED,
        QUP_ERR_I2C_ARB_LOST,
        QUP_ERR_I2C_BUS_ERROR,
        QUP_ERR_I2C_INVALID_SLAVE_ADDR,
        QUP_ERR_XFER_FAIL,
        QUP_ERR_I2C_NACK,
        QUP_ERR_I2C_INVALID_WRITE,
        QUP_ERR_I2C_INVALID_TAG,
        QUP_ERR_UNDEFINED,
} qup_return_t;
 
typedef enum {
        QUP_MINICORE_SPI = 1,
        QUP_MINICORE_I2C_MASTER,
        QUP_MINICORE_I2C_SLAVE
} qup_protocol_t;
 
typedef enum {
        QUP_MODE_FIFO = 0,
        QUP_MODE_BLOCK,
        QUP_MODE_DATAMOVER,
} qup_mode_t;
 
typedef struct {
        qup_protocol_t protocol;
        unsigned int clk_frequency;
        unsigned int src_frequency;
        qup_mode_t mode;
        unsigned int initialized;
} qup_config_t;
 
typedef struct {
        qup_protocol_t protocol;
        union {
                struct {
                        uint8_t addr;
                        uint8_t *data;
                        unsigned int data_len;
                } iic;
                struct {
                        void *in;
                        void *out;
                        unsigned int size;
                } spi;
        } p;
} qup_data_t;
 
/*
 * Initialize GSBI QUP block for FIFO I2C transfers.
 * gsbi_id[IN]: GSBI for which QUP is to be initialized.
 * config_ptr[IN]: configurations parameters for the QUP.
 *
 * return: QUP_SUCCESS, if initialization succeeds.
 */
qup_return_t qup_init(gsbi_id_t gsbi_id, const qup_config_t *config_ptr);
 
/*
 * Set QUP state to run, pause, reset.
 * gsbi_id[IN]: GSBI block for which QUP state is to be set.
 * state[IN]: New state to transition to.
 *
 * return: QUP_SUCCESS, if state transition succeeds.
 */
qup_return_t qup_set_state(gsbi_id_t gsbi_id, uint32_t state);
 
/*
 * Reset the status bits set during an i2c transfer.
 * gsbi_id[IN]: GSBI block for which i2c status bits are to be cleared.
 *
 * return: QUP_SUCCESS, if status bits are cleared successfully.
 */
qup_return_t qup_reset_i2c_master_status(gsbi_id_t gsbi_id);
 
/*
 * Send data to the peripheral on the bus.
 * gsbi_id[IN]: GSBI block for which data is to be sent.
 * p_tx_obj[IN]: Data to be sent to the slave on the bus.
 * stop_seq[IN]: When set to non-zero QUP engine sends i2c stop sequnce.
 *
 * return: QUP_SUCCESS, when data is sent successfully to the peripheral.
 */
qup_return_t qup_send_data(gsbi_id_t gsbi_id, qup_data_t *p_tx_obj,
                           uint8_t stop_seq);
 
/*
 * Receive data from peripheral on the bus.
 * gsbi_id[IN]: GSBI block from which data is to be received.
 * p_tx_obj[IN]: length of data to be received, slave address.
 *      [OUT]: buffer filled with data from slave.
 *
 * return: QUP_SUCCESS, when data is received successfully.
 */
qup_return_t qup_recv_data(gsbi_id_t gsbi_id, qup_data_t *p_tx_obj);
 
#endif //__QUP_H__