#include <acpi/acpigen.h>
#include <device/mmio.h>
#include <console/console.h>
#include <device/device.h>
#include <device/i2c_bus.h>
#include <device/i2c_simple.h>
#include <string.h>
#include <timer.h>
#include <types.h>
#include "dw_i2c.h"

Include dependency graph for dw_i2c.c:

Data Structures
struct	freq

struct	dw_i2c_regs

struct	i2c_descriptor

struct	soc_clock

Macros
#define	DW_I2C_TIMEOUT_US 10000

#define	DW_I2C_FLUSH_TIMEOUT_US 160000

#define	DW_I2C_COMP_TYPE 0x44570140

Enumerations
enum	{ DEFAULT_SDA_HOLD_TIME = 300 , MIN_SS_SCL_HIGHTIME = 4000 , MIN_SS_SCL_LOWTIME = 4700 , MIN_FS_SCL_HIGHTIME = 600 , MIN_FS_SCL_LOWTIME = 1300 , MIN_FP_SCL_HIGHTIME = 260 , MIN_FP_SCL_LOWTIME = 500 , MIN_HS_SCL_HIGHTIME = 60 , MIN_HS_SCL_LOWTIME = 160 }

enum	{ CONTROL_MASTER_MODE = (1 << 0) , CONTROL_SPEED_SS = (1 << 1) , CONTROL_SPEED_FS = (2 << 1) , CONTROL_SPEED_HS = (3 << 1) , CONTROL_SPEED_MASK = (3 << 1) , CONTROL_10BIT_SLAVE = (1 << 3) , CONTROL_10BIT_MASTER = (1 << 4) , CONTROL_RESTART_ENABLE = (1 << 5) , CONTROL_SLAVE_DISABLE = (1 << 6) }

enum	{ CMD_DATA_CMD = (1 << 8) , CMD_DATA_STOP = (1 << 9) }

enum	{ STATUS_ACTIVITY = (1 << 0) , STATUS_TX_FIFO_NOT_FULL = (1 << 1) , STATUS_TX_FIFO_EMPTY = (1 << 2) , STATUS_RX_FIFO_NOT_EMPTY = (1 << 3) , STATUS_RX_FIFO_FULL = (1 << 4) , STATUS_MASTER_ACTIVITY = (1 << 5) , STATUS_SLAVE_ACTIVITY = (1 << 6) }

enum	{ ENABLE_CONTROLLER = (1 << 0) }

enum	{ INTR_STAT_RX_UNDER = (1 << 0) , INTR_STAT_RX_OVER = (1 << 1) , INTR_STAT_RX_FULL = (1 << 2) , INTR_STAT_TX_OVER = (1 << 3) , INTR_STAT_TX_EMPTY = (1 << 4) , INTR_STAT_RD_REQ = (1 << 5) , INTR_STAT_TX_ABORT = (1 << 6) , INTR_STAT_RX_DONE = (1 << 7) , INTR_STAT_ACTIVITY = (1 << 8) , INTR_STAT_STOP_DET = (1 << 9) , INTR_STAT_START_DET = (1 << 10) , INTR_STAT_GEN_CALL = (1 << 11) }

Functions
static const struct i2c_descriptor *	get_bus_descriptor (enum i2c_speed speed)

static const struct soc_clock *	get_soc_descriptor (int ic_clk)

static int	counts_from_time (const struct freq *f, int ns)

static int	counts_from_freq (const struct freq fast, const struct freq slow)

static void	dw_i2c_enable (struct dw_i2c_regs *regs)

static enum cb_err	dw_i2c_disable (struct dw_i2c_regs *regs)

static enum cb_err	dw_i2c_wait_for_bus_idle (struct dw_i2c_regs *regs)

static enum cb_err	dw_i2c_transfer_byte (struct dw_i2c_regs regs, const struct i2c_msg segment, size_t byte, int send_stop)

static enum cb_err	_dw_i2c_transfer (unsigned int bus, const struct i2c_msg *segments, size_t count)

static enum cb_err	dw_i2c_transfer (unsigned int bus, const struct i2c_msg *msg, size_t count)

int	platform_i2c_transfer (unsigned int bus, struct i2c_msg *msg, int count)

static enum cb_err	dw_i2c_set_speed_config (unsigned int bus, const struct dw_i2c_speed_config *config)

static enum cb_err	dw_i2c_gen_config_rise_fall_time (struct dw_i2c_regs regs, enum i2c_speed speed, const struct dw_i2c_bus_config bcfg, int ic_clk, struct dw_i2c_speed_config *config)

enum cb_err	dw_i2c_gen_speed_config (uintptr_t dw_i2c_addr, enum i2c_speed speed, const struct dw_i2c_bus_config bcfg, struct dw_i2c_speed_config config)

static enum cb_err	dw_i2c_set_speed (unsigned int bus, enum i2c_speed speed, const struct dw_i2c_bus_config *bcfg)

enum cb_err	dw_i2c_init (unsigned int bus, const struct dw_i2c_bus_config *bcfg)

static void	dw_i2c_acpi_write_speed_config (const struct dw_i2c_speed_config *config)

void	dw_i2c_dev_init (struct device *dev)

void	dw_i2c_acpi_fill_ssdt (const struct device *dev)

static int	dw_i2c_dev_transfer (struct device dev, const struct i2c_msg msg, size_t count)

Variables
struct dw_i2c_regs	__packed

static const struct i2c_descriptor	speed_descriptors []

static const struct soc_clock	soc_clocks []

const struct i2c_bus_operations	dw_i2c_bus_ops

Macro Definition Documentation

◆ DW_I2C_COMP_TYPE

#define DW_I2C_COMP_TYPE 0x44570140

Definition at line 147 of file dw_i2c.c.

◆ DW_I2C_FLUSH_TIMEOUT_US

#define DW_I2C_FLUSH_TIMEOUT_US 160000

Definition at line 17 of file dw_i2c.c.

◆ DW_I2C_TIMEOUT_US

#define DW_I2C_TIMEOUT_US 10000

Definition at line 15 of file dw_i2c.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
DEFAULT_SDA_HOLD_TIME
MIN_SS_SCL_HIGHTIME
MIN_SS_SCL_LOWTIME
MIN_FS_SCL_HIGHTIME
MIN_FS_SCL_LOWTIME
MIN_FP_SCL_HIGHTIME
MIN_FP_SCL_LOWTIME
MIN_HS_SCL_HIGHTIME
MIN_HS_SCL_LOWTIME

Definition at line 20 of file dw_i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
CONTROL_MASTER_MODE
CONTROL_SPEED_SS
CONTROL_SPEED_FS
CONTROL_SPEED_HS
CONTROL_SPEED_MASK
CONTROL_10BIT_SLAVE
CONTROL_10BIT_MASTER
CONTROL_RESTART_ENABLE
CONTROL_SLAVE_DISABLE

Definition at line 45 of file dw_i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
CMD_DATA_CMD
CMD_DATA_STOP

Definition at line 58 of file dw_i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
STATUS_ACTIVITY
STATUS_TX_FIFO_NOT_FULL
STATUS_TX_FIFO_EMPTY
STATUS_RX_FIFO_NOT_EMPTY
STATUS_RX_FIFO_FULL
STATUS_MASTER_ACTIVITY
STATUS_SLAVE_ACTIVITY

Definition at line 64 of file dw_i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
ENABLE_CONTROLLER

Definition at line 75 of file dw_i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
INTR_STAT_RX_UNDER
INTR_STAT_RX_OVER
INTR_STAT_RX_FULL
INTR_STAT_TX_OVER
INTR_STAT_TX_EMPTY
INTR_STAT_RD_REQ
INTR_STAT_TX_ABORT
INTR_STAT_RX_DONE
INTR_STAT_ACTIVITY
INTR_STAT_STOP_DET
INTR_STAT_START_DET
INTR_STAT_GEN_CALL

Definition at line 80 of file dw_i2c.c.

Function Documentation

◆ _dw_i2c_transfer()

static enum cb_err _dw_i2c_transfer	(	unsigned int	bus,
		const struct i2c_msg *	segments,
		size_t	count
	)

static

Definition at line 261 of file dw_i2c.c.

References ENABLE_CONTROLLER, read32(), and write32().

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◆ counts_from_freq()

static int counts_from_freq	(	const struct freq *	fast,
		const struct freq *	slow
	)

static

Definition at line 255 of file dw_i2c.c.

References DIV_ROUND_UP, freq::ns, and freq::ticks.

◆ counts_from_time()

static int counts_from_time	(	const struct freq *	f,
		int	ns
	)

static

Definition at line 250 of file dw_i2c.c.

References DIV_ROUND_UP, freq::ns, and freq::ticks.

◆ dw_i2c_acpi_fill_ssdt()

void dw_i2c_acpi_fill_ssdt ( const struct device * dev )

Definition at line 802 of file dw_i2c.c.

References acpi_device_path(), acpigen_write_scope(), acpigen_write_scope_end(), CB_SUCCESS, dw_i2c_acpi_write_speed_config(), dw_i2c_base_address(), dw_i2c_gen_speed_config(), dw_i2c_get_soc_cfg(), dw_i2c_soc_dev_to_bus(), DW_I2C_SPEED_CONFIG_COUNT, I2C_SPEED_FAST, dw_i2c_bus_config::speed, dw_i2c_speed_config::speed, and dw_i2c_bus_config::speed_config.

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◆ dw_i2c_acpi_write_speed_config()

static void dw_i2c_acpi_write_speed_config ( const struct dw_i2c_speed_config * config )

static

Definition at line 753 of file dw_i2c.c.

References acpigen_pop_len(), acpigen_write_dword(), acpigen_write_name(), acpigen_write_package(), acpigen_write_word(), config, I2C_SPEED_FAST, I2C_SPEED_FAST_PLUS, and I2C_SPEED_HIGH.

Referenced by dw_i2c_acpi_fill_ssdt().

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◆ dw_i2c_dev_init()

void dw_i2c_dev_init ( struct device * dev )

Definition at line 782 of file dw_i2c.c.

References config, dw_i2c_get_soc_cfg(), dw_i2c_init(), and dw_i2c_soc_dev_to_bus().

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◆ dw_i2c_dev_transfer()

static int dw_i2c_dev_transfer	(	struct device *	dev,
		const struct i2c_msg *	msg,
		size_t	count
	)

static

Definition at line 845 of file dw_i2c.c.

◆ dw_i2c_disable()

static enum cb_err dw_i2c_disable ( struct dw_i2c_regs * regs )

static

Definition at line 261 of file dw_i2c.c.

◆ dw_i2c_enable()

static void dw_i2c_enable ( struct dw_i2c_regs * regs )

static

Definition at line 261 of file dw_i2c.c.

◆ dw_i2c_gen_config_rise_fall_time()

static enum cb_err dw_i2c_gen_config_rise_fall_time	(	struct dw_i2c_regs *	regs,
		enum i2c_speed	speed,
		const struct dw_i2c_bus_config *	bcfg,
		int	ic_clk,
		struct dw_i2c_speed_config *	config
	)

static

Definition at line 484 of file dw_i2c.c.

References CB_SUCCESS, count, and dw_i2c_transfer().

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◆ dw_i2c_gen_speed_config()

enum cb_err dw_i2c_gen_speed_config	(	uintptr_t	dw_i2c_addr,
		enum i2c_speed	speed,
		const struct dw_i2c_bus_config *	bcfg,
		struct dw_i2c_speed_config *	config
	)

Definition at line 484 of file dw_i2c.c.

Referenced by dw_i2c_acpi_fill_ssdt().

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◆ dw_i2c_init()

enum cb_err dw_i2c_init	(	unsigned int	bus,
		const struct dw_i2c_bus_config *	bcfg
	)

Definition at line 484 of file dw_i2c.c.

Referenced by dw_i2c_dev_init(), dw_i2c_soc_init(), and lpss_i2c_early_init_bus().

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◆ dw_i2c_set_speed()

static enum cb_err dw_i2c_set_speed	(	unsigned int	bus,
		enum i2c_speed	speed,
		const struct dw_i2c_bus_config *	bcfg
	)

static

Definition at line 484 of file dw_i2c.c.

◆ dw_i2c_set_speed_config()

static enum cb_err dw_i2c_set_speed_config	(	unsigned int	bus,
		const struct dw_i2c_speed_config *	config
	)

static

Definition at line 484 of file dw_i2c.c.

◆ dw_i2c_transfer()

static enum cb_err dw_i2c_transfer	(	unsigned int	bus,
		const struct i2c_msg *	msg,
		size_t	count
	)

static

Definition at line 261 of file dw_i2c.c.

Referenced by dw_i2c_gen_config_rise_fall_time().

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◆ dw_i2c_transfer_byte()

static enum cb_err dw_i2c_transfer_byte	(	struct dw_i2c_regs *	regs,
		const struct i2c_msg *	segment,
		size_t	byte,
		int	send_stop
	)

static

Definition at line 261 of file dw_i2c.c.

◆ dw_i2c_wait_for_bus_idle()

static enum cb_err dw_i2c_wait_for_bus_idle ( struct dw_i2c_regs * regs )

static

Definition at line 261 of file dw_i2c.c.

◆ get_bus_descriptor()

static const struct i2c_descriptor* get_bus_descriptor ( enum i2c_speed speed )

static

Definition at line 228 of file dw_i2c.c.

References ARRAY_SIZE, NULL, i2c_descriptor::speed, and speed_descriptors.

◆ get_soc_descriptor()

static const struct soc_clock* get_soc_descriptor ( int ic_clk )

static

Definition at line 239 of file dw_i2c.c.

References ARRAY_SIZE, soc_clock::clk_speed_mhz, NULL, and soc_clocks.

◆ platform_i2c_transfer()

int platform_i2c_transfer	(	unsigned int	bus,
		struct i2c_msg *	msg,
		int	count
	)

Definition at line 484 of file dw_i2c.c.

Referenced by bdk_twsix_write_ia().

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Variable Documentation

◆ __packed

struct dw_i2c_regs __packed

◆ dw_i2c_bus_ops

const struct i2c_bus_operations dw_i2c_bus_ops

Initial value:

= {
        .transfer = dw_i2c_dev_transfer,
}

Definition at line 845 of file dw_i2c.c.

◆ soc_clocks

const struct soc_clock soc_clocks[]

static

Initial value:

= {
        {
                .clk_speed_mhz = 120,
                .freq = {
                        .ticks = 120,
                        .ns = 1000,
                },
        },
        {
                .clk_speed_mhz = 133,
                .freq = {
                        .ticks = 400,
                        .ns = 3000,
                },
        },
        {
                .clk_speed_mhz = 150,
                .freq = {
                        .ticks = 600,
                        .ns = 4000,
                },
        },
        {
                .clk_speed_mhz = 216,
                .freq = {
                        .ticks = 1080,
                        .ns = 5000,
                },
        },
}

Referenced by get_soc_descriptor().

◆ speed_descriptors

const struct i2c_descriptor speed_descriptors[]

static

Referenced by get_bus_descriptor().

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ DW_I2C_COMP_TYPE

◆ DW_I2C_FLUSH_TIMEOUT_US

◆ DW_I2C_TIMEOUT_US

Enumeration Type Documentation

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

Function Documentation

◆ _dw_i2c_transfer()

◆ counts_from_freq()

◆ counts_from_time()

◆ dw_i2c_acpi_fill_ssdt()

◆ dw_i2c_acpi_write_speed_config()

◆ dw_i2c_dev_init()

◆ dw_i2c_dev_transfer()

◆ dw_i2c_disable()

◆ dw_i2c_enable()

◆ dw_i2c_gen_config_rise_fall_time()

◆ dw_i2c_gen_speed_config()

◆ dw_i2c_init()

◆ dw_i2c_set_speed()

◆ dw_i2c_set_speed_config()

◆ dw_i2c_transfer()

◆ dw_i2c_transfer_byte()

◆ dw_i2c_wait_for_bus_idle()

◆ get_bus_descriptor()

◆ get_soc_descriptor()

◆ platform_i2c_transfer()

Variable Documentation

◆ __packed

◆ dw_i2c_bus_ops

◆ soc_clocks

◆ speed_descriptors