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/* Copyright 2016 The ChromiumOS Authors
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef __CROS_EC_ISH_I2C_H
#define __CROS_EC_ISH_I2C_H
#include <stdint.h>
#include "task.h"
#define I2C_TSC_TIMEOUT 2000000
#define I2C_CALIB_ADDRESS 0x3
#define I2C_INTERRUPT_TIMEOUT (TICKFREQ / 20)
#define NS_IN_SEC 1000
#define DEFAULT_SDA_HOLD 240
#define DEFAULT_SDA_HOLD_STD 2400
#define DEFAULT_SDA_HOLD_FAST 600
#define DEFAULT_SDA_HOLD_FAST_PLUS 300
#define DEFAULT_SDA_HOLD_HIGH 140
#define NS_2_COUNTERS(ns, clk) ((ns * clk) / NS_IN_SEC)
#define COUNTERS_2_NS(counters, clk) \
(counters * (NANOSECONDS_IN_SEC / (clk * HZ_IN_MEGAHZ)))
#define I2C_TX_FLUSH_TIMEOUT_USEC 200
#define ISH_I2C_FIFO_SIZE 64
enum {
/* freq mode values */
I2C_FREQ_25 = 0,
I2C_FREQ_50 = 1,
I2C_FREQ_100 = 2,
I2C_FREQ_120 = 3,
I2C_FREQ_40 = 4,
I2C_FREQ_20 = 5,
I2C_FREQ_37 = 6
};
const unsigned int clk_in[] = {
[I2C_FREQ_25] = 25, [I2C_FREQ_50] = 50, [I2C_FREQ_100] = 100,
[I2C_FREQ_120] = 120, [I2C_FREQ_40] = 40, [I2C_FREQ_20] = 20,
[I2C_FREQ_37] = 37,
};
const uint8_t spkln[] = {
[I2C_FREQ_25] = 2, [I2C_FREQ_50] = 3, [I2C_FREQ_100] = 5,
[I2C_FREQ_120] = 6, [I2C_FREQ_40] = 2, [I2C_FREQ_20] = 1,
[I2C_FREQ_37] = 2,
};
enum { I2C_READ, I2C_WRITE };
enum {
/* REGISTERS */
IC_ENABLE = 0x6c,
IC_STATUS = 0x70,
IC_ENABLE_STATUS = 0x9c,
IC_CON = 0x00,
IC_TAR = 0x04,
IC_DATA_CMD = 0x10,
IC_RX_TL = 0x38,
IC_TX_TL = 0x3c,
IC_COMP_PARAM_1 = 0xf4,
IC_INTR_MASK = 0x30,
IC_RAW_INTR_STAT = 0x34,
IC_INTR_STAT = 0x2c,
IC_CLR_TX_ABRT = 0x54,
IC_TX_ABRT_SOURCE = 0x80,
IC_SS_SCL_HCNT = 0x14,
IC_SS_SCL_LCNT = 0x18,
IC_FS_SCL_HCNT = 0x1c,
IC_FS_SCL_LCNT = 0x20,
IC_HS_SCL_HCNT = 0x24,
IC_HS_SCL_LCNT = 0x28,
IC_CLR_STOP_DET = 0x60,
IC_CLR_START_DET = 0x64,
IC_TXFLR = 0x74,
IC_SDA_HOLD = 0x7c,
IC_FS_SPKLEN = 0xA0,
IC_HS_SPKLEN = 0xA4,
/* IC_ENABLE VALUES */
IC_ENABLE_ENABLE = 1,
IC_ENABLE_DISABLE = 0,
/* IC_STATUS OFFSETS */
IC_STATUS_MASTER_ACTIVITY = 5,
IC_STATUS_TFE = 2,
/* IC_CON OFFSETS */
MASTER_MODE_OFFSET = 0,
SPEED_OFFSET = 1,
IC_RESTART_EN_OFFSET = 5,
IC_SLAVE_DISABLE_OFFSET = 6,
/* IC_CON VALUES */
MASTER_MODE = 1,
STD_SPEED = 1,
FAST_SPEED = 2,
HIGH_SPEED = 3,
IC_RESTART_EN = 1,
IC_SLAVE_DISABLE = 1,
/* IC_CON WRITE VALUES */
MASTER_MODE_VAL = (MASTER_MODE << MASTER_MODE_OFFSET),
STD_SPEED_VAL = (STD_SPEED << SPEED_OFFSET),
FAST_SPEED_VAL = (FAST_SPEED << SPEED_OFFSET),
HIGH_SPEED_VAL = (HIGH_SPEED << SPEED_OFFSET),
SPEED_MASK = (0x3 << SPEED_OFFSET),
IC_RESTART_EN_VAL = (IC_RESTART_EN << IC_RESTART_EN_OFFSET),
IC_SLAVE_DISABLE_VAL = (IC_SLAVE_DISABLE << IC_SLAVE_DISABLE_OFFSET),
/* IC_TAR OFFSETS */
IC_TAR_OFFSET = 0,
SPECIAL_OFFSET = 11,
IC_10BITADDR_MASTER_OFFSET = 12,
/* IC_TAR VALUES */
TAR_SPECIAL = 0,
IC_10BITADDR_MASTER = 0,
/* IC_TAR WRITE VALUES */
IC_10BITADDR_MASTER_VAL =
(IC_10BITADDR_MASTER << IC_10BITADDR_MASTER_OFFSET),
TAR_SPECIAL_VAL = (TAR_SPECIAL << SPECIAL_OFFSET),
/* IC_DATA_CMD OFFSETS */
DATA_CMD_DAT_OFFSET = 0,
DATA_CMD_CMD_OFFSET = 8,
DATA_CMD_STOP_OFFSET = 9,
DATA_CMD_RESTART_OFFSET = 10,
/* IC_DATA_CMD VALUES */
DATA_CMD_READ = 1,
DATA_CMD_WRITE = 0,
DATA_CMD_STOP = 1,
DATA_CMD_RESTART = 1,
/* IC_DATA_CMD WRITE VALUES */
DATA_CMD_WRITE_VAL = (DATA_CMD_WRITE << DATA_CMD_CMD_OFFSET),
DATA_CMD_READ_VAL = (DATA_CMD_READ << DATA_CMD_CMD_OFFSET),
DATA_CMD_STOP_VAL = (DATA_CMD_STOP << DATA_CMD_STOP_OFFSET),
DATA_CMD_RESTART_VAL = (DATA_CMD_RESTART << DATA_CMD_RESTART_OFFSET),
/* IC_TX_TL */
IC_TX_TL_VAL = 0,
/* IC_COM_PARAM_OFFSETS */
TX_BUFFER_DEPTH_OFFSET = 16,
RX_BUFFER_DEPTH_OFFSET = 8,
/* IC_INTR_MASK VALUES */
M_RX_FULL = BIT(2),
M_TX_EMPTY = BIT(4),
M_TX_ABRT = BIT(6),
M_STOP_DET = BIT(9),
M_START_DET = BIT(10),
IC_INTR_WRITE_MASK_VAL = (M_STOP_DET | M_TX_ABRT),
IC_INTR_READ_MASK_VAL = (M_RX_FULL | M_TX_ABRT),
DISABLE_INT = 0,
ENABLE_WRITE_INT = 1,
ENABLE_READ_INT = 2,
/* IC_ENABLE_STATUS_OFFSETS */
IC_EN_OFFSET = 0,
/* IC_ENABLE_STATUS_VALUES */
IC_EN_DISABLED_VAL = 0,
IC_EN_DISABLED = (IC_EN_DISABLED_VAL << IC_EN_OFFSET),
IC_EN_MASK = BIT(IC_EN_OFFSET),
/* IC_TX_ABRT_SOURCE bits */
ABRT_7B_ADDR_NOACK = 1,
};
struct i2c_bus_data {
uint16_t hcnt;
uint16_t lcnt;
uint16_t sda_hold;
};
struct i2c_bus_info {
uint8_t bus_id;
struct i2c_bus_data std_speed;
struct i2c_bus_data fast_speed;
struct i2c_bus_data fast_plus_speed;
struct i2c_bus_data high_speed;
} __attribute__((__packed__));
enum i2c_speed {
I2C_SPEED_100KHZ, /* 100kHz */
I2C_SPEED_400KHZ, /* 400kHz */
I2C_SPEED_1MHZ, /* 1MHz */
I2C_SPEED_3M4HZ, /* 3.4MHz */
};
struct i2c_context {
uint32_t *base;
uint8_t max_rx_depth;
uint8_t max_tx_depth;
uint8_t bus;
enum i2c_speed speed;
uint32_t interrupts;
uint32_t reason;
uint32_t int_pin;
uint8_t error_flag;
task_id_t wait_task_id;
};
#endif /* __CROS_EC_ISH_I2C_H */
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