#include <device/mmio.h>
#include <assert.h>
#include <console/console.h>
#include <delay.h>
#include <device/i2c_simple.h>
#include <soc/clk.h>
#include <soc/i2c.h>
#include <soc/periph.h>
#include <soc/pinmux.h>
#include <timer.h>

Include dependency graph for i2c.c:

Data Structures
struct	i2c_regs

struct	hsi2c_regs

struct	i2c_bus

Macros
#define	I2C_TIMEOUT_US (1000 * USECS_PER_MSEC)

#define	HSI2C_SLV_ADDR_MAS(x) ((x & 0x3ff) << 10)

Enumerations
enum	{ Hsi2cFuncModeI2c = 1 << 0 , Hsi2cMaster = 1 << 3 , Hsi2cRxchon = 1 << 6 , Hsi2cTxchon = 1 << 7 , Hsi2cSwRst = 1 << 31 }

enum	{ Hsi2cTxFifoLevel = 0x7f << 0 , Hsi2cTxFifoFull = 1 << 7 , Hsi2cTxFifoEmpty = 1 << 8 , Hsi2cRxFifoLevel = 0x7f << 16 , Hsi2cRxFifoFull = 1 << 23 , Hsi2cRxFifoEmpty = 1 << 24 }

enum	{ Hsi2cRxfifoEn = 1 << 0 , Hsi2cTxfifoEn = 1 << 1 , Hsi2cTxfifoTriggerLevel = 0x20 << 16 , Hsi2cRxfifoTriggerLevel = 0x20 << 4 }

enum	{ Hsi2cTrailingCount = 0xff }

enum	{ Hsi2cIntTxAlmostemptyEn = 1 << 0 , Hsi2cIntRxAlmostfullEn = 1 << 1 , Hsi2cIntTrailingEn = 1 << 6 , Hsi2cIntI2cEn = 1 << 9 }

enum	{ Hsi2cAutoMode = 1 << 31 , Hsi2c10bitAddrMode = 1 << 30 , Hsi2cHsMode = 1 << 29 }

enum	{ Hsi2cReadWrite = 1 << 16 , Hsi2cStopAfterTrans = 1 << 17 , Hsi2cMasterRun = 1 << 31 }

enum	{ Hsi2cTimeoutEn = 1 << 31 }

enum	{ Hsi2cMasterBusy = 1 << 17 , Hsi2cSlaveBusy = 1 << 16 , Hsi2cTimeoutAuto = 1 << 4 , Hsi2cNoDev = 1 << 3 , Hsi2cNoDevAck = 1 << 2 , Hsi2cTransAbort = 1 << 1 , Hsi2cTransDone = 1 << 0 }

enum	{ Hsi2cTimeout = 100 }

enum	{ I2cConIntPending = 0x1 << 4 , I2cConIntEn = 0x1 << 5 , I2cConAckGen = 0x1 << 7 }

enum	{ I2cStatAck = 0x1 << 0 , I2cStatAddrZero = 0x1 << 1 , I2cStatAddrSlave = 0x1 << 2 , I2cStatArb = 0x1 << 3 , I2cStatEnable = 0x1 << 4 , I2cStatStartStop = 0x1 << 5 , I2cStatBusy = 0x1 << 5 , I2cStatModeMask = 0x3 << 6 , I2cStatSlaveRecv = 0x0 << 6 , I2cStatSlaveXmit = 0x1 << 6 , I2cStatMasterRecv = 0x2 << 6 , I2cStatMasterXmit = 0x3 << 6 }

Functions
	check_member (hsi2c_regs, i2c_addr, 0x70)

static int	hsi2c_get_clk_details (struct i2c_bus i2c, int div, int *cycle, unsigned int op_clk)

static void	hsi2c_ch_init (struct i2c_bus *i2c, unsigned int frequency)

static void	hsi2c_reset (struct i2c_bus *i2c)

static void	i2c_ch_init (struct i2c_bus *i2c, int speed)

void	i2c_init (unsigned int bus, int speed, int slaveadd)

static int	hsi2c_check_transfer (struct hsi2c_regs *regs)

static int	hsi2c_wait_for_transfer (struct hsi2c_regs *i2c)

static int	hsi2c_senddata (struct hsi2c_regs regs, const uint8_t data, int len)

static int	hsi2c_recvdata (struct hsi2c_regs regs, uint8_t data, int len)

static int	hsi2c_segment (struct i2c_msg seg, struct hsi2c_regs regs, int stop)

static int	hsi2c_transfer (struct i2c_bus i2c, struct i2c_msg segments, int count)

static int	i2c_int_pending (struct i2c_regs *regs)

static void	i2c_clear_int (struct i2c_regs *regs)

static void	i2c_ack_enable (struct i2c_regs *regs)

static void	i2c_ack_disable (struct i2c_regs *regs)

static int	i2c_got_ack (struct i2c_regs *regs)

static int	i2c_wait_for_idle (struct i2c_regs *regs, int timeout_us)

static int	i2c_wait_for_int (struct i2c_regs *regs, int timeout_us)

static int	i2c_send_stop (struct i2c_regs *regs)

static int	i2c_send_start (struct i2c_regs *regs, int read, int chip)

static int	i2c_xmit_buf (struct i2c_regs regs, uint8_t data, int len)

static int	i2c_recv_buf (struct i2c_regs regs, uint8_t data, int len)

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

Variables
static struct i2c_bus	i2c_busses []

Macro Definition Documentation

◆ HSI2C_SLV_ADDR_MAS

#define HSI2C_SLV_ADDR_MAS ( x ) ((x & 0x3ff) << 10)

Definition at line 212 of file i2c.c.

◆ I2C_TIMEOUT_US

#define I2C_TIMEOUT_US (1000 * USECS_PER_MSEC)

Definition at line 14 of file i2c.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cFuncModeI2c
Hsi2cMaster
Hsi2cRxchon
Hsi2cTxchon
Hsi2cSwRst

Definition at line 143 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cTxFifoLevel
Hsi2cTxFifoFull
Hsi2cTxFifoEmpty
Hsi2cRxFifoLevel
Hsi2cRxFifoFull
Hsi2cRxFifoEmpty

Definition at line 152 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cRxfifoEn
Hsi2cTxfifoEn
Hsi2cTxfifoTriggerLevel
Hsi2cRxfifoTriggerLevel

Definition at line 162 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cTrailingCount

Definition at line 170 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cIntTxAlmostemptyEn
Hsi2cIntRxAlmostfullEn
Hsi2cIntTrailingEn
Hsi2cIntI2cEn

Definition at line 175 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cAutoMode
Hsi2c10bitAddrMode
Hsi2cHsMode

Definition at line 183 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cReadWrite
Hsi2cStopAfterTrans
Hsi2cMasterRun

Definition at line 190 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cTimeoutEn

Definition at line 197 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cMasterBusy
Hsi2cSlaveBusy
Hsi2cTimeoutAuto
Hsi2cNoDev
Hsi2cNoDevAck
Hsi2cTransAbort
Hsi2cTransDone

Definition at line 202 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
Hsi2cTimeout

Definition at line 214 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
I2cConIntPending
I2cConIntEn
I2cConAckGen

Definition at line 218 of file i2c.c.

◆ anonymous enum

anonymous enum

Enumerator
I2cStatAck
I2cStatAddrZero
I2cStatAddrSlave
I2cStatArb
I2cStatEnable
I2cStatStartStop
I2cStatBusy
I2cStatModeMask
I2cStatSlaveRecv
I2cStatSlaveXmit
I2cStatMasterRecv
I2cStatMasterXmit

Definition at line 224 of file i2c.c.

Function Documentation

◆ check_member()

check_member	(	hsi2c_regs	,
		i2c_addr	,
		0x70
	)

◆ hsi2c_ch_init()

static void hsi2c_ch_init	(	struct i2c_bus *	i2c,
		unsigned int	frequency
	)

static

Definition at line 269 of file i2c.c.

References hsi2c_get_clk_details(), Hsi2cAutoMode, Hsi2cRxfifoEn, Hsi2cTimeoutEn, Hsi2cTrailingCount, Hsi2cTxfifoEn, i2c_bus::hsregs, read32(), and write32().

Referenced by hsi2c_reset(), and i2c_init().

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◆ hsi2c_check_transfer()

static int hsi2c_check_transfer ( struct hsi2c_regs * regs )

static

Definition at line 366 of file i2c.c.

References BIOS_ERR, Hsi2cMasterBusy, Hsi2cNoDev, Hsi2cNoDevAck, Hsi2cTimeoutAuto, Hsi2cTransAbort, printk, and read32().

Referenced by hsi2c_recvdata(), hsi2c_senddata(), and hsi2c_wait_for_transfer().

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◆ hsi2c_get_clk_details()

static int hsi2c_get_clk_details	(	struct i2c_bus *	i2c,
		int *	div,
		int *	cycle,
		unsigned int	op_clk
	)

static

Definition at line 240 of file i2c.c.

References BIOS_ERR, clock_get_periph_rate(), i2c_bus::hsregs, i2c_bus::periph_id, printk, and read32().

Referenced by hsi2c_ch_init().

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◆ hsi2c_recvdata()

static int hsi2c_recvdata	(	struct hsi2c_regs *	regs,
		uint8_t *	data,
		int	len
	)

static

Definition at line 419 of file i2c.c.

References hsi2c_check_transfer(), Hsi2cRxFifoEmpty, and read32().

Referenced by hsi2c_segment().

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◆ hsi2c_reset()

static void hsi2c_reset ( struct i2c_bus * i2c )

static

Definition at line 306 of file i2c.c.

References hsi2c_ch_init(), Hsi2cSwRst, i2c_bus::hsregs, read32(), and write32().

Referenced by hsi2c_transfer(), and i2c_init().

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◆ hsi2c_segment()

static int hsi2c_segment	(	struct i2c_msg *	seg,
		struct hsi2c_regs *	regs,
		int	stop
	)

static

Definition at line 430 of file i2c.c.

References i2c_msg::buf, i2c_msg::flags, hsi2c_recvdata(), hsi2c_senddata(), HSI2C_SLV_ADDR_MAS, hsi2c_wait_for_transfer(), Hsi2cFuncModeI2c, Hsi2cMaster, Hsi2cMasterRun, Hsi2cReadWrite, Hsi2cRxchon, Hsi2cStopAfterTrans, Hsi2cTxchon, I2C_M_RD, i2c_msg::len, i2c_msg::slave, and write32().

Referenced by hsi2c_transfer().

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◆ hsi2c_senddata()

static int hsi2c_senddata	(	struct hsi2c_regs *	regs,
		const uint8_t *	data,
		int	len
	)

static

Definition at line 408 of file i2c.c.

References hsi2c_check_transfer(), Hsi2cTxFifoFull, read32(), and write32().

Referenced by hsi2c_segment().

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◆ hsi2c_transfer()

static int hsi2c_transfer	(	struct i2c_bus *	i2c,
		struct i2c_msg *	segments,
		int	count
	)

static

Definition at line 468 of file i2c.c.

References count, hsi2c_reset(), hsi2c_segment(), hsi2c_wait_for_transfer(), and i2c_bus::hsregs.

Referenced by platform_i2c_transfer().

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◆ hsi2c_wait_for_transfer()

static int hsi2c_wait_for_transfer ( struct hsi2c_regs * i2c )

static

Definition at line 395 of file i2c.c.

References hsi2c_check_transfer(), Hsi2cTimeout, stopwatch_expired(), and stopwatch_init_msecs_expire().

Referenced by hsi2c_segment(), and hsi2c_transfer().

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◆ i2c_ack_disable()

static void i2c_ack_disable ( struct i2c_regs * regs )

static

Definition at line 503 of file i2c.c.

References I2cConAckGen, read8(), and write8().

Referenced by i2c_recv_buf().

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◆ i2c_ack_enable()

static void i2c_ack_enable ( struct i2c_regs * regs )

static

Definition at line 498 of file i2c.c.

References I2cConAckGen, read8(), and write8().

Referenced by i2c_recv_buf(), and i2c_xmit_buf().

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◆ i2c_ch_init()

static void i2c_ch_init	(	struct i2c_bus *	i2c,
		int	speed
	)

static

Definition at line 318 of file i2c.c.

References clock_get_periph_rate(), I2cStatEnable, I2cStatMasterXmit, i2c_bus::periph_id, i2c_bus::regs, val, and write32().

Referenced by i2c_init().

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◆ i2c_clear_int()

static void i2c_clear_int ( struct i2c_regs * regs )

static

Definition at line 493 of file i2c.c.

References I2cConIntPending, read8(), and write8().

Referenced by i2c_recv_buf(), i2c_send_start(), i2c_send_stop(), and i2c_xmit_buf().

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◆ i2c_got_ack()

static int i2c_got_ack ( struct i2c_regs * regs )

static

Definition at line 508 of file i2c.c.

References I2cStatAck, and read8().

Referenced by i2c_send_start(), and i2c_xmit_buf().

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◆ i2c_init()

void i2c_init	(	unsigned int	bus,
		int	speed,
		int	slaveadd
	)

Definition at line 347 of file i2c.c.

References i2c_regs::add, clock_get_periph_rate(), i2c_regs::con, hsi2c_ch_init(), hsi2c_reset(), i2c_busses, i2c_ch_init(), I2cStatEnable, I2cStatMasterXmit, i2c_bus::is_highspeed, s3c24x0_i2c_bus::periph_id, s3c24x0_i2c_bus::regs, i2c_regs::stat, val, and write32().

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◆ i2c_int_pending()

static int i2c_int_pending ( struct i2c_regs * regs )

static

Definition at line 488 of file i2c.c.

References I2cConIntPending, and read8().

Referenced by i2c_wait_for_int().

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◆ i2c_recv_buf()

static int i2c_recv_buf	(	struct i2c_regs *	regs,
		uint8_t *	data,
		int	len
	)

static

Definition at line 586 of file i2c.c.

References ASSERT, i2c_ack_disable(), i2c_ack_enable(), i2c_clear_int(), i2c_wait_for_int(), and read8().

Referenced by platform_i2c_transfer().

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◆ i2c_send_start()

static int i2c_send_start	(	struct i2c_regs *	regs,
		int	read,
		int	chip
	)

static

Definition at line 545 of file i2c.c.

References chip, i2c_clear_int(), i2c_got_ack(), I2C_TIMEOUT_US, i2c_wait_for_int(), I2cStatEnable, I2cStatMasterRecv, I2cStatMasterXmit, I2cStatStartStop, and write8().

Referenced by platform_i2c_transfer().

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◆ i2c_send_stop()

static int i2c_send_stop ( struct i2c_regs * regs )

static

Definition at line 537 of file i2c.c.

References i2c_clear_int(), I2C_TIMEOUT_US, i2c_wait_for_idle(), I2cStatEnable, I2cStatModeMask, read8(), and write8().

Referenced by platform_i2c_transfer().

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◆ i2c_wait_for_idle()

static int i2c_wait_for_idle	(	struct i2c_regs *	regs,
		int	timeout_us
	)

static

Definition at line 513 of file i2c.c.

References BIOS_ERR, I2cStatBusy, printk, read8(), and udelay().

Referenced by i2c_send_stop(), and platform_i2c_transfer().

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◆ i2c_wait_for_int()

static int i2c_wait_for_int	(	struct i2c_regs *	regs,
		int	timeout_us
	)

static

Definition at line 525 of file i2c.c.

References BIOS_ERR, i2c_int_pending(), printk, and udelay().

Referenced by i2c_recv_buf(), i2c_send_start(), and i2c_xmit_buf().

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◆ i2c_xmit_buf()

static int i2c_xmit_buf	(	struct i2c_regs *	regs,
		uint8_t *	data,
		int	len
	)

static

Definition at line 563 of file i2c.c.

References ASSERT, BIOS_INFO, i2c_ack_enable(), i2c_clear_int(), i2c_got_ack(), i2c_wait_for_int(), printk, and write8().

Referenced by platform_i2c_transfer().

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◆ platform_i2c_transfer()

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

Definition at line 607 of file i2c.c.

References i2c_msg::buf, count, i2c_msg::flags, hsi2c_transfer(), i2c_busses, I2C_M_RD, i2c_recv_buf(), i2c_send_start(), i2c_send_stop(), I2C_TIMEOUT_US, i2c_wait_for_idle(), i2c_xmit_buf(), I2cStatEnable, I2cStatMasterXmit, i2c_bus::is_highspeed, i2c_msg::len, i2c_bus::regs, i2c_msg::slave, and write8().

Referenced by i2c_transfer().

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Variable Documentation

◆ i2c_busses

struct i2c_bus i2c_busses[]

static

Definition at line 62 of file i2c.c.

Referenced by i2c_init(), and platform_i2c_transfer().

Data Structures

Macros

Enumerations

Functions

Variables

Macro Definition Documentation

◆ HSI2C_SLV_ADDR_MAS

◆ I2C_TIMEOUT_US

Enumeration Type Documentation

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

◆ anonymous enum

Function Documentation

◆ check_member()

◆ hsi2c_ch_init()

◆ hsi2c_check_transfer()

◆ hsi2c_get_clk_details()

◆ hsi2c_recvdata()

◆ hsi2c_reset()

◆ hsi2c_segment()

◆ hsi2c_senddata()

◆ hsi2c_transfer()

◆ hsi2c_wait_for_transfer()

◆ i2c_ack_disable()

◆ i2c_ack_enable()

◆ i2c_ch_init()

◆ i2c_clear_int()

◆ i2c_got_ack()

◆ i2c_init()

◆ i2c_int_pending()

◆ i2c_recv_buf()

◆ i2c_send_start()

◆ i2c_send_stop()

◆ i2c_wait_for_idle()

◆ i2c_wait_for_int()

◆ i2c_xmit_buf()

◆ platform_i2c_transfer()

Variable Documentation

◆ i2c_busses