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/*
* NVIDIA Tegra I2C controller
*
* Copyright 2010-2011 NVIDIA Corporation
*
* This software may be used and distributed according to the
* terms of the GNU Public License, Version 2, incorporated
* herein by reference.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* Version 2 as published by the Free Software Foundation.
*
* 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
*/
#ifndef _TEGRA_I2C_H_
#define _TEGRA_I2C_H_
#include <asm/types.h>
enum {
I2C_TIMEOUT_USEC = 10000, /* Wait time for completion */
I2C_FIFO_DEPTH = 8, /* I2C fifo depth */
};
enum i2c_transaction_flags {
I2C_IS_WRITE = 0x1, /* for I2C write operation */
I2C_IS_10_BIT_ADDRESS = 0x2, /* for 10-bit I2C slave address */
I2C_USE_REPEATED_START = 0x4, /* for repeat start */
I2C_NO_ACK = 0x8, /* for slave that won't generate ACK */
I2C_SOFTWARE_CONTROLLER = 0x10, /* for I2C transfer using GPIO */
I2C_NO_STOP = 0x20,
};
/* Contians the I2C transaction details */
struct i2c_trans_info {
/* flags to indicate the transaction details */
enum i2c_transaction_flags flags;
u32 address; /* I2C slave device address */
u32 num_bytes; /* number of bytes to be transferred */
/*
* Send/receive buffer. For the I2C send operation this buffer should
* be filled with the data to be sent to the slave device. For the I2C
* receive operation this buffer is filled with the data received from
* the slave device.
*/
u8 *buf;
int is_10bit_address;
};
struct i2c_control {
u32 tx_fifo;
u32 rx_fifo;
u32 packet_status;
u32 fifo_control;
u32 fifo_status;
u32 int_mask;
u32 int_status;
};
struct dvc_ctlr {
u32 ctrl1; /* 00: DVC_CTRL_REG1 */
u32 ctrl2; /* 04: DVC_CTRL_REG2 */
u32 ctrl3; /* 08: DVC_CTRL_REG3 */
u32 status; /* 0C: DVC_STATUS_REG */
u32 ctrl; /* 10: DVC_I2C_CTRL_REG */
u32 addr_data; /* 14: DVC_I2C_ADDR_DATA_REG */
u32 reserved_0[2]; /* 18: */
u32 req; /* 20: DVC_REQ_REGISTER */
u32 addr_data3; /* 24: DVC_I2C_ADDR_DATA_REG_3 */
u32 reserved_1[6]; /* 28: */
u32 cnfg; /* 40: DVC_I2C_CNFG */
u32 cmd_addr0; /* 44: DVC_I2C_CMD_ADDR0 */
u32 cmd_addr1; /* 48: DVC_I2C_CMD_ADDR1 */
u32 cmd_data1; /* 4C: DVC_I2C_CMD_DATA1 */
u32 cmd_data2; /* 50: DVC_I2C_CMD_DATA2 */
u32 reserved_2[2]; /* 54: */
u32 i2c_status; /* 5C: DVC_I2C_STATUS */
struct i2c_control control; /* 60 ~ 78 */
};
struct i2c_ctlr {
u32 cnfg; /* 00: I2C_I2C_CNFG */
u32 cmd_addr0; /* 04: I2C_I2C_CMD_ADDR0 */
u32 cmd_addr1; /* 08: I2C_I2C_CMD_DATA1 */
u32 cmd_data1; /* 0C: I2C_I2C_CMD_DATA2 */
u32 cmd_data2; /* 10: DVC_I2C_CMD_DATA2 */
u32 reserved_0[2]; /* 14: */
u32 status; /* 1C: I2C_I2C_STATUS */
u32 sl_cnfg; /* 20: I2C_I2C_SL_CNFG */
u32 sl_rcvd; /* 24: I2C_I2C_SL_RCVD */
u32 sl_status; /* 28: I2C_I2C_SL_STATUS */
u32 sl_addr1; /* 2C: I2C_I2C_SL_ADDR1 */
u32 sl_addr2; /* 30: I2C_I2C_SL_ADDR2 */
u32 reserved_1[2]; /* 34: */
u32 sl_delay_count; /* 3C: I2C_I2C_SL_DELAY_COUNT */
u32 reserved_2[4]; /* 40: */
struct i2c_control control; /* 50 ~ 68 */
};
/* bit fields definitions for IO Packet Header 1 format */
#define PKT_HDR1_PROTOCOL_SHIFT 4
#define PKT_HDR1_PROTOCOL_MASK (0xf << PKT_HDR1_PROTOCOL_SHIFT)
#define PKT_HDR1_CTLR_ID_SHIFT 12
#define PKT_HDR1_CTLR_ID_MASK (0xf << PKT_HDR1_CTLR_ID_SHIFT)
#define PKT_HDR1_PKT_ID_SHIFT 16
#define PKT_HDR1_PKT_ID_MASK (0xff << PKT_HDR1_PKT_ID_SHIFT)
#define PROTOCOL_TYPE_I2C 1
/* bit fields definitions for IO Packet Header 2 format */
#define PKT_HDR2_PAYLOAD_SIZE_SHIFT 0
#define PKT_HDR2_PAYLOAD_SIZE_MASK (0xfff << PKT_HDR2_PAYLOAD_SIZE_SHIFT)
/* bit fields definitions for IO Packet Header 3 format */
#define PKT_HDR3_READ_MODE_SHIFT 19
#define PKT_HDR3_READ_MODE_MASK (1 << PKT_HDR3_READ_MODE_SHIFT)
#define PKT_HDR3_SLAVE_ADDR_SHIFT 0
#define PKT_HDR3_SLAVE_ADDR_MASK (0x3ff << PKT_HDR3_SLAVE_ADDR_SHIFT)
#define DVC_CTRL_REG3_I2C_HW_SW_PROG_SHIFT 26
#define DVC_CTRL_REG3_I2C_HW_SW_PROG_MASK \
(1 << DVC_CTRL_REG3_I2C_HW_SW_PROG_SHIFT)
/* I2C_CNFG */
#define I2C_CNFG_NEW_MASTER_FSM_SHIFT 11
#define I2C_CNFG_NEW_MASTER_FSM_MASK (1 << I2C_CNFG_NEW_MASTER_FSM_SHIFT)
#define I2C_CNFG_PACKET_MODE_SHIFT 10
#define I2C_CNFG_PACKET_MODE_MASK (1 << I2C_CNFG_PACKET_MODE_SHIFT)
/* I2C_SL_CNFG */
#define I2C_SL_CNFG_NEWSL_SHIFT 2
#define I2C_SL_CNFG_NEWSL_MASK (1 << I2C_SL_CNFG_NEWSL_SHIFT)
/* I2C_FIFO_STATUS */
#define TX_FIFO_FULL_CNT_SHIFT 0
#define TX_FIFO_FULL_CNT_MASK (0xf << TX_FIFO_FULL_CNT_SHIFT)
#define TX_FIFO_EMPTY_CNT_SHIFT 4
#define TX_FIFO_EMPTY_CNT_MASK (0xf << TX_FIFO_EMPTY_CNT_SHIFT)
/* I2C_INTERRUPT_STATUS */
#define I2C_INT_XFER_COMPLETE_SHIFT 7
#define I2C_INT_XFER_COMPLETE_MASK (1 << I2C_INT_XFER_COMPLETE_SHIFT)
#define I2C_INT_NO_ACK_SHIFT 3
#define I2C_INT_NO_ACK_MASK (1 << I2C_INT_NO_ACK_SHIFT)
#define I2C_INT_ARBITRATION_LOST_SHIFT 2
#define I2C_INT_ARBITRATION_LOST_MASK (1 << I2C_INT_ARBITRATION_LOST_SHIFT)
/**
* Returns the bus number of the DVC controller
*
* @return number of bus, or -1 if there is no DVC active
*/
int tegra_i2c_get_dvc_bus_num(void);
#endif /* _TEGRA_I2C_H_ */
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