| /* |
| * Copyright (c) 2022 Andes Technology Corporation |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| /** |
| * @file I2C driver for AndesTech atciic100 IP |
| */ |
| #include <errno.h> |
| #include <zephyr/kernel.h> |
| #include <zephyr/device.h> |
| #include <soc.h> |
| #include <zephyr/drivers/i2c.h> |
| #include <zephyr/sys/util.h> |
| #include <zephyr/sys/sys_io.h> |
| |
| #define I2C_MAX_COUNT 256 |
| #define BURST_CMD_COUNT 1 |
| |
| #define RED_IDR 0x00 |
| #define REG_CFG 0x10 |
| #define REG_INTE 0x14 |
| #define REG_STAT 0x18 |
| #define REG_ADDR 0x1C |
| #define REG_DATA 0x20 |
| #define REG_CTRL 0x24 |
| #define REG_CMD 0x28 |
| #define REG_SET 0x2C |
| |
| #define I2C_BASE(dev) \ |
| ((const struct i2c_atciic100_config * const)(dev)->config)->base |
| |
| #define I2C_CFG(dev) (I2C_BASE(dev) + REG_CFG) |
| #define I2C_INTE(dev) (I2C_BASE(dev) + REG_INTE) |
| #define I2C_STAT(dev) (I2C_BASE(dev) + REG_STAT) |
| #define I2C_ADDR(dev) (I2C_BASE(dev) + REG_ADDR) |
| #define I2C_CMD(dev) (I2C_BASE(dev) + REG_CMD) |
| #define I2C_SET(dev) (I2C_BASE(dev) + REG_SET) |
| #define I2C_DATA(dev) (I2C_BASE(dev) + REG_DATA) |
| #define I2C_CTRL(dev) (I2C_BASE(dev) + REG_CTRL) |
| |
| #define TARGET_ADDR_MSK BIT_MASK(10) |
| #define DATA_MSK BIT_MASK(8) |
| |
| /* Interrupt Enable Register(RW) */ |
| #define IEN_ALL BIT_MASK(10) |
| #define IEN_CMPL BIT(9) |
| #define IEN_BYTE_RECV BIT(8) |
| #define IEN_BYTE_TRANS BIT(7) |
| #define IEN_START BIT(6) |
| #define IEN_STOP BIT(5) |
| #define IEN_ARB_LOSE BIT(4) |
| #define IEN_ADDR_HIT BIT(3) |
| #define IEN_FIFO_HALF BIT(2) |
| #define IEN_FIFO_FULL BIT(1) |
| #define IEN_FIFO_EMPTY BIT(0) |
| |
| /* Status Register(RW) */ |
| #define STATUS_W1C_ALL (BIT_MASK(7) << 3) |
| #define STATUS_LINE_SDA BIT(14) |
| #define STATUS_LINE_SCL BIT(13) |
| #define STATUS_GEN_CALL BIT(12) |
| #define STATUS_BUS_BUSY BIT(11) |
| #define STATUS_ACK BIT(10) |
| #define STATUS_CMPL BIT(9) |
| #define STATUS_BYTE_RECV BIT(8) |
| #define STATUS_BYTE_TRANS BIT(7) |
| #define STATUS_START BIT(6) |
| #define STATUS_STOP BIT(5) |
| #define STATUS_ARB_LOSE BIT(4) |
| #define STATUS_ADDR_HIT BIT(3) |
| #define STATUS_FIFO_HALF BIT(2) |
| #define STATUS_FIFO_FULL BIT(1) |
| #define STATUS_FIFO_EMPTY BIT(0) |
| |
| /* Control Register(RW) */ |
| #define CTRL_PHASE_START BIT(12) |
| #define CTRL_PHASE_ADDR BIT(11) |
| #define CTRL_PHASE_DATA BIT(10) |
| #define CTRL_PHASE_STOP BIT(9) |
| #define CTRL_DIR BIT(8) |
| #define CTRL_DATA_COUNT BIT_MASK(8) |
| |
| /* Command Register(RW) */ |
| #define CMD_MSK BIT_MASK(3) |
| #define CMD_NO_ACT (0x0) |
| #define CMD_ISSUE_TRANSACTION (0x1) |
| #define CMD_ACK (0x2) |
| #define CMD_NACK (0x3) |
| #define CMD_CLEAR_FIFO (0x4) |
| #define CMD_RESET_I2C (0x5) |
| |
| /* Setup Register(RW) */ |
| #define SETUP_T_SUDAT (BIT_MASK(5) << 24) |
| #define SETUP_T_SP (BIT_MASK(3) << 21) |
| #define SETUP_T_HDDAT (BIT_MASK(5) << 16) |
| #define SETUP_T_SCL_RATIO BIT(13) |
| #define SETUP_T_SCLHI (BIT_MASK(9) << 4) |
| #define SETUP_DMA_EN BIT(3) |
| #define SETUP_CONTROLLER BIT(2) |
| #define SETUP_ADDRESSING BIT(1) |
| #define SETUP_I2C_EN BIT(0) |
| |
| #if CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC == 30000000 |
| |
| #define SETUP_T_SUDAT_STD (0x3) |
| #define SETUP_T_SP_STD (0x1) |
| #define SETUP_T_HDDAT_STD (5) |
| #define SETUP_T_SCL_RATIO_STD (0x0) |
| #define SETUP_T_SCLHI_STD (138) |
| |
| #define SETUP_T_SUDAT_FAST (0x0) |
| #define SETUP_T_SP_FAST (0x1) |
| #define SETUP_T_HDDAT_FAST (5) |
| #define SETUP_T_SCL_RATIO_FAST (0x1) |
| #define SETUP_T_SCLHI_FAST (18) |
| |
| #define SETUP_T_SUDAT_FAST_P (0x0) |
| #define SETUP_T_SP_FAST_P (0x1) |
| #define SETUP_T_HDDAT_FAST_P (0x0) |
| #define SETUP_T_SCL_RATIO_FAST_P (0x1) |
| #define SETUP_T_SCLHI_FAST_P (6) |
| |
| #elif CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC == 40000000 |
| |
| #define SETUP_T_SUDAT_STD (0x4) |
| #define SETUP_T_SP_STD (0x2) |
| #define SETUP_T_HDDAT_STD (0x6) |
| #define SETUP_T_SCL_RATIO_STD (0x0) |
| #define SETUP_T_SCLHI_STD (182) |
| |
| #define SETUP_T_SUDAT_FAST (0x0) |
| #define SETUP_T_SP_FAST (0x2) |
| #define SETUP_T_HDDAT_FAST (0x6) |
| #define SETUP_T_SCL_RATIO_FAST (0x1) |
| #define SETUP_T_SCLHI_FAST (23) |
| |
| #define SETUP_T_SUDAT_FAST_P (0x0) |
| #define SETUP_T_SP_FAST_P (0x2) |
| #define SETUP_T_HDDAT_FAST_P (0x0) |
| #define SETUP_T_SCL_RATIO_FAST_P (0x1) |
| #define SETUP_T_SCLHI_FAST_P (7) |
| |
| #else |
| |
| #define SETUP_T_SUDAT_STD (0x9) |
| #define SETUP_T_SP_STD (0x3) |
| #define SETUP_T_HDDAT_STD (12) |
| #define SETUP_T_SCL_RATIO_STD (0x0) |
| #define SETUP_T_SCLHI_STD (287) |
| |
| #define SETUP_T_SUDAT_FAST (0x0) |
| #define SETUP_T_SP_FAST (0x3) |
| #define SETUP_T_HDDAT_FAST (12) |
| #define SETUP_T_SCL_RATIO_FAST (0x1) |
| #define SETUP_T_SCLHI_FAST (38) |
| |
| #define SETUP_T_SUDAT_FAST_P (0x0) |
| #define SETUP_T_SP_FAST_P (0x3) |
| #define SETUP_T_HDDAT_FAST_P (0x0) |
| #define SETUP_T_SCL_RATIO_FAST_P (0x1) |
| #define SETUP_T_SCLHI_FAST_P (13) |
| |
| #endif |
| |
| #define SETUP_SPEED_MSK (SETUP_T_SUDAT | \ |
| SETUP_T_SP | \ |
| SETUP_T_HDDAT | \ |
| SETUP_T_SCL_RATIO | \ |
| SETUP_T_SCLHI) |
| |
| #define SETUP_SPEED_STD ((SETUP_T_SUDAT_STD << 24) | \ |
| (SETUP_T_SP_STD << 21) | \ |
| (SETUP_T_HDDAT_STD << 16) | \ |
| (SETUP_T_SCL_RATIO_STD << 13) | \ |
| (SETUP_T_SCLHI_STD << 4)) |
| |
| #define SETUP_SPEED_FAST ((SETUP_T_SUDAT_FAST << 24) | \ |
| (SETUP_T_SP_FAST << 21) | \ |
| (SETUP_T_HDDAT_FAST << 16) | \ |
| (SETUP_T_SCL_RATIO_FAST << 13) | \ |
| (SETUP_T_SCLHI_FAST << 4)) |
| |
| #define SETUP_SPEED_FAST_PLUS ((SETUP_T_SUDAT_FAST_P << 24) | \ |
| (SETUP_T_SP_FAST_P << 21) | \ |
| (SETUP_T_HDDAT_FAST_P << 16) | \ |
| (SETUP_T_SCL_RATIO_FAST_P << 13)| \ |
| (SETUP_T_SCLHI_FAST_P << 4)) |
| |
| #define MAX_XFER_SZ (256) |
| |
| enum _i2c_ctrl_reg_item_dir { |
| I2C_CONTROLLER_TX = 0x0, |
| I2C_CONTROLLER_RX = 0x1, |
| I2C_TARGET_TX = 0x1, |
| I2C_TARGET_RX = 0x0, |
| }; |
| |
| /* I2C driver running state */ |
| enum _i2c_driver_state { |
| I2C_DRV_NONE = 0x0, |
| I2C_DRV_INIT = BIT(0), |
| I2C_DRV_POWER = BIT(1), |
| I2C_DRV_CFG_PARAM = BIT(2), |
| I2C_DRV_CONTROLLER_TX = BIT(3), |
| I2C_DRV_CONTROLLER_RX = BIT(4), |
| I2C_DRV_TARGET_TX = BIT(5), |
| I2C_DRV_TARGET_RX = BIT(6), |
| I2C_DRV_CONTROLLER_TX_CMPL = BIT(7), |
| I2C_DRV_CONTROLLER_RX_CMPL = BIT(8), |
| I2C_DRV_TARGET_TX_CMPL = BIT(9), |
| I2C_DRV_TARGET_RX_CMPL = BIT(10), |
| }; |
| |
| /* brief I2C Status */ |
| struct _i2c_status { |
| /* /< Mode: 0=Slave, 1=Master */ |
| uint32_t mode:1; |
| uint32_t general_call: 1; |
| uint32_t arbitration_lost : 1; |
| uint32_t target_ack : 1; |
| }; |
| |
| struct i2c_atciic100_dev_data_t { |
| struct k_sem i2c_busy_sem; |
| volatile uint32_t driver_state; |
| uint8_t *middleware_rx_buf; |
| uint8_t *middleware_tx_buf; |
| uint32_t fifo_depth; |
| uint32_t target_addr; |
| uint32_t xfer_wt_num; |
| uint32_t xfer_rd_num; |
| uint32_t xfered_data_wt_ptr; /* write pointer */ |
| uint32_t xfered_data_rd_ptr; /* read pointer */ |
| volatile struct _i2c_status status; |
| const struct i2c_target_callbacks *target_callbacks; |
| struct i2c_target_config *target_config; |
| }; |
