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/*
* This file is part of FH8620 BSP for RT-Thread distribution.
*
* Copyright (c) 2016 Shanghai Fullhan Microelectronics Co., Ltd.
* All rights reserved
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Visit http://www.fullhan.com to get contact with Fullhan.
*
* Change Logs:
* Date Author Notes
*/
#ifndef FH_I2C_H_
#define FH_I2C_H_
#include "fh_def.h"
#define OFFSET_I2C_CON (0x0000)
#define OFFSET_I2C_TAR (0x0004)
#define OFFSET_I2C_SAR (0x0008)
#define OFFSET_I2C_HS_MADDR (0x000C)
#define OFFSET_I2C_DATA_CMD (0x0010)
#define OFFSET_I2C_SS_SCL_HCNT (0x0014)
#define OFFSET_I2C_SS_SCL_LCNT (0x0018)
#define OFFSET_I2C_FS_SCL_HCNT (0x001C)
#define OFFSET_I2C_FS_SCL_LCNT (0x0020)
#define OFFSET_I2C_HS_SCL_HCNT (0x0024)
#define OFFSET_I2C_HS_SCL_LCNT (0x0028)
#define OFFSET_I2C_INTR_STAT (0x002c)
#define OFFSET_I2C_INTR_MASK (0x0030)
#define OFFSET_I2C_RAW_INTR_STAT (0x0034)
#define OFFSET_I2C_RX_TL (0x0038)
#define OFFSET_I2C_TX_TL (0x003c)
#define OFFSET_I2C_CLR_INTR (0x0040)
#define OFFSET_I2C_CLR_RX_UNDER (0x0044)
#define OFFSET_I2C_CLR_RX_OVER (0x0048)
#define OFFSET_I2C_CLR_TX_OVER (0x004c)
#define OFFSET_I2C_CLR_RD_REQ (0x0050)
#define OFFSET_I2C_CLR_TX_ABRT (0x0054)
#define OFFSET_I2C_CLR_RX_DONE (0x0058)
#define OFFSET_I2C_CLR_ACTIVITY (0x005c)
#define OFFSET_I2C_CLR_STOP_DET (0x0060)
#define OFFSET_I2C_CLR_START_DET (0x0064)
#define OFFSET_I2C_CLR_GEN_CALL (0x0068)
#define OFFSET_I2C_ENABLE (0x006c)
#define OFFSET_I2C_STATUS (0x0070)
#define OFFSET_I2C_TXFLR (0x0074)
#define OFFSET_I2C_RXFLR (0x0078)
#define OFFSET_I2C_DMA_CR (0x0088)
#define OFFSET_I2C_DMA_TDLR (0x008c)
#define OFFSET_I2C_DMA_RDLR (0x0090)
#define OFFSET_I2C_COMP_PARAM1 (0x00f4)
#define OFFSET_I2C_TX_ABRT_SOURCE (0x0080)
#define I2C_M_TEN 0x0100 /* this is a ten bit chip address */
#define I2C_M_RD 0x0001 /* read data, from slave to master */
#define I2C_M_NOSTART 0x4000 /* if I2C_FUNC_PROTOCOL_MANGLING */
#define I2C_M_REV_DIR_ADDR 0x2000 /* if I2C_FUNC_PROTOCOL_MANGLING */
#define I2C_M_IGNORE_NAK 0x1000 /* if I2C_FUNC_PROTOCOL_MANGLING */
#define I2C_M_NO_RD_ACK 0x0800 /* if I2C_FUNC_PROTOCOL_MANGLING */
#define I2C_M_RECV_LEN 0x0400 /* length will be first received byte */
#define DW_IC_CON_MASTER 0x1
#define DW_IC_CON_SPEED_STD 0x2
#define DW_IC_CON_SPEED_FAST 0x4
#define DW_IC_CON_10BITADDR_MASTER 0x10
#define DW_IC_CON_RESTART_EN 0x20
#define DW_IC_CON_SLAVE_DISABLE 0x40
#define DW_IC_INTR_RX_UNDER 0x001
#define DW_IC_INTR_RX_OVER 0x002
#define DW_IC_INTR_RX_FULL 0x004
#define DW_IC_INTR_TX_OVER 0x008
#define DW_IC_INTR_TX_EMPTY 0x010
#define DW_IC_INTR_RD_REQ 0x020
#define DW_IC_INTR_TX_ABRT 0x040
#define DW_IC_INTR_RX_DONE 0x080
#define DW_IC_INTR_ACTIVITY 0x100
#define DW_IC_INTR_STOP_DET 0x200
#define DW_IC_INTR_START_DET 0x400
#define DW_IC_INTR_GEN_CALL 0x800
#define DW_IC_INTR_DEFAULT_MASK (DW_IC_INTR_RX_FULL | \
DW_IC_INTR_TX_EMPTY | \
DW_IC_INTR_TX_ABRT | \
DW_IC_INTR_STOP_DET)
#define DW_IC_STATUS_ACTIVITY 0x1
#define DW_IC_STATUS_MASTER_ACTIVITY 0x20
#define DW_IC_ERR_TX_ABRT 0x1
/*
* status codes
*/
#define STATUS_IDLE 0x0
#define STATUS_WRITE_IN_PROGRESS 0x1
#define STATUS_READ_IN_PROGRESS 0x2
#define TIMEOUT 20 /* ms */
/*
* hardware abort codes from the DW_IC_TX_ABRT_SOURCE register
*
* only expected abort codes are listed here
* refer to the datasheet for the full list
*/
#define ABRT_7B_ADDR_NOACK 0
#define ABRT_10ADDR1_NOACK 1
#define ABRT_10ADDR2_NOACK 2
#define ABRT_TXDATA_NOACK 3
#define ABRT_GCALL_NOACK 4
#define ABRT_GCALL_READ 5
#define ABRT_SBYTE_ACKDET 7
#define ABRT_SBYTE_NORSTRT 9
#define ABRT_10B_RD_NORSTRT 10
#define ABRT_MASTER_DIS 11
#define ARB_LOST 12
#define DW_IC_TX_ABRT_7B_ADDR_NOACK (1UL << ABRT_7B_ADDR_NOACK)
#define DW_IC_TX_ABRT_10ADDR1_NOACK (1UL << ABRT_10ADDR1_NOACK)
#define DW_IC_TX_ABRT_10ADDR2_NOACK (1UL << ABRT_10ADDR2_NOACK)
#define DW_IC_TX_ABRT_TXDATA_NOACK (1UL << ABRT_TXDATA_NOACK)
#define DW_IC_TX_ABRT_GCALL_NOACK (1UL << ABRT_GCALL_NOACK)
#define DW_IC_TX_ABRT_GCALL_READ (1UL << ABRT_GCALL_READ)
#define DW_IC_TX_ABRT_SBYTE_ACKDET (1UL << ABRT_SBYTE_ACKDET)
#define DW_IC_TX_ABRT_SBYTE_NORSTRT (1UL << ABRT_SBYTE_NORSTRT)
#define DW_IC_TX_ABRT_10B_RD_NORSTRT (1UL << ABRT_10B_RD_NORSTRT)
#define DW_IC_TX_ABRT_MASTER_DIS (1UL << ABRT_MASTER_DIS)
#define DW_IC_TX_ARB_LOST (1UL << ARB_LOST)
#define DW_IC_TX_ABRT_NOACK (DW_IC_TX_ABRT_7B_ADDR_NOACK | \
DW_IC_TX_ABRT_10ADDR1_NOACK | \
DW_IC_TX_ABRT_10ADDR2_NOACK | \
DW_IC_TX_ABRT_TXDATA_NOACK | \
DW_IC_TX_ABRT_GCALL_NOACK)
static char *abort_sources[] = {
[ABRT_7B_ADDR_NOACK] =
"slave address not acknowledged (7bit mode)",
[ABRT_10ADDR1_NOACK] =
"first address byte not acknowledged (10bit mode)",
[ABRT_10ADDR2_NOACK] =
"second address byte not acknowledged (10bit mode)",
[ABRT_TXDATA_NOACK] =
"data not acknowledged",
[ABRT_GCALL_NOACK] =
"no acknowledgement for a general call",
[ABRT_GCALL_READ] =
"read after general call",
[ABRT_SBYTE_ACKDET] =
"start byte acknowledged",
[ABRT_SBYTE_NORSTRT] =
"trying to send start byte when restart is disabled",
[ABRT_10B_RD_NORSTRT] =
"trying to read when restart is disabled (10bit mode)",
[ABRT_MASTER_DIS] =
"trying to use disabled adapter",
[ARB_LOST] =
"lost arbitration",
};
/* i2c interrput definition */
#define M_GEN_CALL (1<<11)
#define M_START_DET (1<<10)
#define M_STOP_DET (1<<9)
#define M_ACTIVITY (1<<8)
#define M_RX_DONE (1<<7)
#define M_TX_ABRT (1<<6)
#define M_RD_REQ (1<<5)
#define M_TX_EMPTY (1<<4)
#define M_TX_OVER (1<<3)
#define M_RX_FULL (1<<2)
#define M_RX_OVER (1<<1)
#define M_RX_UNDER (1<<0)
#define M_NONE (0)
struct i2c_config
{
int speed_mode;
UINT32 tx_fifo_depth;
UINT32 rx_fifo_depth;
};
struct fh_i2c_obj
{
UINT32 id;
UINT32 irq;
UINT32 base;
UINT32 input_clock;
UINT32 abort_source;
struct i2c_config config;
};
rt_inline UINT32 I2C_SetTransmitThreshold(struct fh_i2c_obj *i2c_obj, int txtl)
{
return SET_REG(i2c_obj->base + OFFSET_I2C_TX_TL, txtl);
}
rt_inline UINT32 I2C_GetReceiveFifoLevel(struct fh_i2c_obj *i2c_obj)
{
return GET_REG(i2c_obj->base + OFFSET_I2C_RXFLR);
}
rt_inline UINT32 I2C_GetTransmitFifoLevel(struct fh_i2c_obj *i2c_obj)
{
return GET_REG(i2c_obj->base + OFFSET_I2C_TXFLR);
}
rt_inline void I2C_SetSlaveAddress(struct fh_i2c_obj *i2c_obj, rt_uint16_t addr)
{
UINT32 reg;
reg = GET_REG(i2c_obj->base + OFFSET_I2C_TAR);
reg &= ~(0x3ff);
reg |= addr & 0x3ff;
SET_REG(i2c_obj->base + OFFSET_I2C_TAR, reg);
}
rt_inline void I2C_Enable(struct fh_i2c_obj *i2c_obj, int enable)
{
SET_REG(i2c_obj->base + OFFSET_I2C_ENABLE, enable);
}
rt_inline UINT8 I2C_GetData(struct fh_i2c_obj *i2c_obj)
{
return GET_REG(i2c_obj->base + OFFSET_I2C_DATA_CMD) & 0xff;
}
rt_inline void I2C_SetDataCmd(struct fh_i2c_obj *i2c_obj, UINT32 reg)
{
SET_REG(i2c_obj->base + OFFSET_I2C_DATA_CMD, reg);
}
rt_inline void I2C_SetInterruptMask(struct fh_i2c_obj *i2c_obj, UINT32 mask)
{
SET_REG(i2c_obj->base + OFFSET_I2C_INTR_MASK, mask);
}
rt_inline UINT32 I2C_GetInterruptMask(struct fh_i2c_obj *i2c_obj)
{
return GET_REG(i2c_obj->base + OFFSET_I2C_INTR_MASK);
}
void I2C_Init(struct fh_i2c_obj *i2c_obj);
int I2C_HandleTxAbort(struct fh_i2c_obj *i2c_obj);
UINT32 I2C_ClearAndGetInterrupts(struct fh_i2c_obj *i2c_obj);
int I2C_WaitMasterIdle(struct fh_i2c_obj *i2c_obj);
int I2C_WaitDeviceIdle(struct fh_i2c_obj *i2c_obj);
#endif /* FH_I2C_H_ */
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