157 lines
5.0 KiB
C
157 lines
5.0 KiB
C
/*
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* NVIDIA Tegra I2C controller
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*
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* Copyright 2010-2011 NVIDIA Corporation
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*
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* SPDX-License-Identifier: GPL-2.0
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*/
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#ifndef _TEGRA_I2C_H_
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#define _TEGRA_I2C_H_
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#include <asm/types.h>
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enum {
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I2C_TIMEOUT_USEC = 10000, /* Wait time for completion */
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I2C_FIFO_DEPTH = 8, /* I2C fifo depth */
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};
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enum i2c_transaction_flags {
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I2C_IS_WRITE = 0x1, /* for I2C write operation */
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I2C_IS_10_BIT_ADDRESS = 0x2, /* for 10-bit I2C slave address */
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I2C_USE_REPEATED_START = 0x4, /* for repeat start */
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I2C_NO_ACK = 0x8, /* for slave that won't generate ACK */
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I2C_SOFTWARE_CONTROLLER = 0x10, /* for I2C transfer using GPIO */
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I2C_NO_STOP = 0x20,
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};
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/* Contians the I2C transaction details */
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struct i2c_trans_info {
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/* flags to indicate the transaction details */
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enum i2c_transaction_flags flags;
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u32 address; /* I2C slave device address */
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u32 num_bytes; /* number of bytes to be transferred */
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/*
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* Send/receive buffer. For the I2C send operation this buffer should
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* be filled with the data to be sent to the slave device. For the I2C
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* receive operation this buffer is filled with the data received from
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* the slave device.
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*/
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u8 *buf;
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int is_10bit_address;
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};
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struct i2c_control {
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u32 tx_fifo;
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u32 rx_fifo;
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u32 packet_status;
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u32 fifo_control;
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u32 fifo_status;
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u32 int_mask;
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u32 int_status;
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};
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struct dvc_ctlr {
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u32 ctrl1; /* 00: DVC_CTRL_REG1 */
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u32 ctrl2; /* 04: DVC_CTRL_REG2 */
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u32 ctrl3; /* 08: DVC_CTRL_REG3 */
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u32 status; /* 0C: DVC_STATUS_REG */
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u32 ctrl; /* 10: DVC_I2C_CTRL_REG */
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u32 addr_data; /* 14: DVC_I2C_ADDR_DATA_REG */
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u32 reserved_0[2]; /* 18: */
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u32 req; /* 20: DVC_REQ_REGISTER */
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u32 addr_data3; /* 24: DVC_I2C_ADDR_DATA_REG_3 */
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u32 reserved_1[6]; /* 28: */
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u32 cnfg; /* 40: DVC_I2C_CNFG */
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u32 cmd_addr0; /* 44: DVC_I2C_CMD_ADDR0 */
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u32 cmd_addr1; /* 48: DVC_I2C_CMD_ADDR1 */
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u32 cmd_data1; /* 4C: DVC_I2C_CMD_DATA1 */
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u32 cmd_data2; /* 50: DVC_I2C_CMD_DATA2 */
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u32 reserved_2[2]; /* 54: */
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u32 i2c_status; /* 5C: DVC_I2C_STATUS */
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struct i2c_control control; /* 60 ~ 78 */
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};
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struct i2c_ctlr {
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u32 cnfg; /* 00: I2C_I2C_CNFG */
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u32 cmd_addr0; /* 04: I2C_I2C_CMD_ADDR0 */
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u32 cmd_addr1; /* 08: I2C_I2C_CMD_DATA1 */
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u32 cmd_data1; /* 0C: I2C_I2C_CMD_DATA2 */
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u32 cmd_data2; /* 10: DVC_I2C_CMD_DATA2 */
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u32 reserved_0[2]; /* 14: */
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u32 status; /* 1C: I2C_I2C_STATUS */
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u32 sl_cnfg; /* 20: I2C_I2C_SL_CNFG */
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u32 sl_rcvd; /* 24: I2C_I2C_SL_RCVD */
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u32 sl_status; /* 28: I2C_I2C_SL_STATUS */
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u32 sl_addr1; /* 2C: I2C_I2C_SL_ADDR1 */
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u32 sl_addr2; /* 30: I2C_I2C_SL_ADDR2 */
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u32 reserved_1[2]; /* 34: */
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u32 sl_delay_count; /* 3C: I2C_I2C_SL_DELAY_COUNT */
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u32 reserved_2[4]; /* 40: */
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struct i2c_control control; /* 50 ~ 68 */
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u32 clk_div; /* 6C: I2C_I2C_CLOCK_DIVISOR */
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};
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/* bit fields definitions for IO Packet Header 1 format */
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#define PKT_HDR1_PROTOCOL_SHIFT 4
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#define PKT_HDR1_PROTOCOL_MASK (0xf << PKT_HDR1_PROTOCOL_SHIFT)
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#define PKT_HDR1_CTLR_ID_SHIFT 12
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#define PKT_HDR1_CTLR_ID_MASK (0xf << PKT_HDR1_CTLR_ID_SHIFT)
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#define PKT_HDR1_PKT_ID_SHIFT 16
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#define PKT_HDR1_PKT_ID_MASK (0xff << PKT_HDR1_PKT_ID_SHIFT)
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#define PROTOCOL_TYPE_I2C 1
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/* bit fields definitions for IO Packet Header 2 format */
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#define PKT_HDR2_PAYLOAD_SIZE_SHIFT 0
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#define PKT_HDR2_PAYLOAD_SIZE_MASK (0xfff << PKT_HDR2_PAYLOAD_SIZE_SHIFT)
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/* bit fields definitions for IO Packet Header 3 format */
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#define PKT_HDR3_READ_MODE_SHIFT 19
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#define PKT_HDR3_READ_MODE_MASK (1 << PKT_HDR3_READ_MODE_SHIFT)
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#define PKT_HDR3_REPEAT_START_SHIFT 16
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#define PKT_HDR3_REPEAT_START_MASK (1 << PKT_HDR3_REPEAT_START_SHIFT)
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#define PKT_HDR3_SLAVE_ADDR_SHIFT 0
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#define PKT_HDR3_SLAVE_ADDR_MASK (0x3ff << PKT_HDR3_SLAVE_ADDR_SHIFT)
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#define DVC_CTRL_REG3_I2C_HW_SW_PROG_SHIFT 26
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#define DVC_CTRL_REG3_I2C_HW_SW_PROG_MASK \
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(1 << DVC_CTRL_REG3_I2C_HW_SW_PROG_SHIFT)
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/* I2C_CNFG */
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#define I2C_CNFG_NEW_MASTER_FSM_SHIFT 11
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#define I2C_CNFG_NEW_MASTER_FSM_MASK (1 << I2C_CNFG_NEW_MASTER_FSM_SHIFT)
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#define I2C_CNFG_PACKET_MODE_SHIFT 10
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#define I2C_CNFG_PACKET_MODE_MASK (1 << I2C_CNFG_PACKET_MODE_SHIFT)
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/* I2C_SL_CNFG */
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#define I2C_SL_CNFG_NEWSL_SHIFT 2
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#define I2C_SL_CNFG_NEWSL_MASK (1 << I2C_SL_CNFG_NEWSL_SHIFT)
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/* I2C_FIFO_STATUS */
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#define TX_FIFO_FULL_CNT_SHIFT 0
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#define TX_FIFO_FULL_CNT_MASK (0xf << TX_FIFO_FULL_CNT_SHIFT)
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#define TX_FIFO_EMPTY_CNT_SHIFT 4
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#define TX_FIFO_EMPTY_CNT_MASK (0xf << TX_FIFO_EMPTY_CNT_SHIFT)
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/* I2C_INTERRUPT_STATUS */
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#define I2C_INT_XFER_COMPLETE_SHIFT 7
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#define I2C_INT_XFER_COMPLETE_MASK (1 << I2C_INT_XFER_COMPLETE_SHIFT)
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#define I2C_INT_NO_ACK_SHIFT 3
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#define I2C_INT_NO_ACK_MASK (1 << I2C_INT_NO_ACK_SHIFT)
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#define I2C_INT_ARBITRATION_LOST_SHIFT 2
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#define I2C_INT_ARBITRATION_LOST_MASK (1 << I2C_INT_ARBITRATION_LOST_SHIFT)
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/* I2C_CLK_DIVISOR_REGISTER */
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#define CLK_DIV_STD_FAST_MODE 0x19
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#define CLK_DIV_HS_MODE 1
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#define CLK_MULT_STD_FAST_MODE 8
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/**
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* Returns the bus number of the DVC controller
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*
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* @return number of bus, or -1 if there is no DVC active
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*/
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int tegra_i2c_get_dvc_bus(struct udevice **busp);
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#endif /* _TEGRA_I2C_H_ */
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