#include <device/mmio.h>
#include <assert.h>
#include <console/console.h>
#include <delay.h>
#include <device/i2c_simple.h>
#include <soc/addressmap.h>
#include <soc/grf.h>
#include <soc/soc.h>
#include <soc/i2c.h>
#include <soc/clock.h>
#include <stddef.h>
#include <stdint.h>

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Data Structures
struct	rk_i2c_regs

Macros
#define	RETRY_COUNT 3

#define	I2C_TIMEOUT_US 100000

#define	I2C_BUS_MAX 6

#define	I2C_NOACK 2

#define	I2C_TIMEOUT 3

#define	i2c_info(x...) do {if (0) printk(BIOS_DEBUG, x); } while (0)

#define	I2C_ACT2NAK (1<<6)

#define	I2C_NAK (1<<5)

#define	I2C_STOP (1<<4)

#define	I2C_START (1<<3)

#define	I2C_MODE_TX (0<<1)

#define	I2C_MODE_TRX (1<<1)

#define	I2C_MODE_RX (2<<1)

#define	I2C_EN (1<<0)

#define	I2C_8BIT (1<<24)

#define	I2C_16BIT (3<<24)

#define	I2C_24BIT (7<<24)

#define	I2C_CNT(cnt) ((cnt) & 0x3F)

#define	I2C_NAKRCVI (1<<6)

#define	I2C_STOPI (1<<5)

#define	I2C_STARTI (1<<4)

#define	I2C_MBRFI (1<<3)

#define	I2C_MBTFI (1<<2)

#define	I2C_BRFI (1<<1)

#define	I2C_BTFI (1<<0)

#define	I2C_CLEANI 0x7F

Functions
static int	i2c_send_start (struct rk_i2c_regs *reg_addr)

static int	i2c_send_stop (struct rk_i2c_regs *reg_addr)

static int	i2c_read (struct rk_i2c_regs *reg_addr, struct i2c_msg segment)

static int	i2c_write (struct rk_i2c_regs *reg_addr, struct i2c_msg segment)

static int	i2c_do_xfer (void *reg_addr, struct i2c_msg segment)

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

void	i2c_init (unsigned int bus, unsigned int hz)

Variables
static const uintptr_t	i2c_bus [] = IC_BASES

Macro Definition Documentation

◆ I2C_16BIT

#define I2C_16BIT (3<<24)

Definition at line 54 of file i2c.c.

◆ I2C_24BIT

#define I2C_24BIT (7<<24)

Definition at line 55 of file i2c.c.

◆ I2C_8BIT

#define I2C_8BIT (1<<24)

Definition at line 53 of file i2c.c.

◆ I2C_ACT2NAK

#define I2C_ACT2NAK (1<<6)

Definition at line 44 of file i2c.c.

◆ I2C_BRFI

#define I2C_BRFI (1<<1)

Definition at line 65 of file i2c.c.

◆ I2C_BTFI

#define I2C_BTFI (1<<0)

Definition at line 66 of file i2c.c.

◆ I2C_BUS_MAX

#define I2C_BUS_MAX 6

Definition at line 19 of file i2c.c.

◆ I2C_CLEANI

#define I2C_CLEANI 0x7F

Definition at line 67 of file i2c.c.

◆ I2C_CNT

#define I2C_CNT ( cnt ) ((cnt) & 0x3F)

Definition at line 58 of file i2c.c.

◆ I2C_EN

#define I2C_EN (1<<0)

Definition at line 51 of file i2c.c.

◆ i2c_info

#define i2c_info ( x... ) do {if (0) printk(BIOS_DEBUG, x); } while (0)

Definition at line 23 of file i2c.c.

◆ I2C_MBRFI

#define I2C_MBRFI (1<<3)

Definition at line 63 of file i2c.c.

◆ I2C_MBTFI

#define I2C_MBTFI (1<<2)

Definition at line 64 of file i2c.c.

◆ I2C_MODE_RX

#define I2C_MODE_RX (2<<1)

Definition at line 50 of file i2c.c.

◆ I2C_MODE_TRX

#define I2C_MODE_TRX (1<<1)

Definition at line 49 of file i2c.c.

◆ I2C_MODE_TX

#define I2C_MODE_TX (0<<1)

Definition at line 48 of file i2c.c.

◆ I2C_NAK

#define I2C_NAK (1<<5)

Definition at line 45 of file i2c.c.

◆ I2C_NAKRCVI

#define I2C_NAKRCVI (1<<6)

Definition at line 60 of file i2c.c.

◆ I2C_NOACK

#define I2C_NOACK 2

Definition at line 20 of file i2c.c.

◆ I2C_START

#define I2C_START (1<<3)

Definition at line 47 of file i2c.c.

◆ I2C_STARTI

#define I2C_STARTI (1<<4)

Definition at line 62 of file i2c.c.

◆ I2C_STOP

#define I2C_STOP (1<<4)

Definition at line 46 of file i2c.c.

◆ I2C_STOPI

#define I2C_STOPI (1<<5)

Definition at line 61 of file i2c.c.

◆ I2C_TIMEOUT

#define I2C_TIMEOUT 3

Definition at line 21 of file i2c.c.

◆ I2C_TIMEOUT_US

#define I2C_TIMEOUT_US 100000

Definition at line 18 of file i2c.c.

◆ RETRY_COUNT

#define RETRY_COUNT 3

Definition at line 16 of file i2c.c.

Function Documentation

◆ i2c_do_xfer()

static int i2c_do_xfer	(	void *	reg_addr,
		struct i2c_msg	segment
	)

static

Definition at line 207 of file i2c.c.

References i2c_msg::flags, I2C_M_RD, i2c_read(), i2c_send_start(), i2c_send_stop(), I2C_TIMEOUT, and i2c_write().

Referenced by platform_i2c_transfer().

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◆ i2c_init()

void i2c_init	(	unsigned int	bus,
		unsigned int	hz
	)

Definition at line 236 of file i2c.c.

References assert, BIOS_DEBUG, DIV_ROUND_UP, KHz, printk, rkclk_i2c_clock_for_bus(), and write32().

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◆ i2c_read()

static int i2c_read	(	struct rk_i2c_regs *	reg_addr,
		struct i2c_msg	segment
	)

static

Definition at line 113 of file i2c.c.

References BIOS_ERR, i2c_msg::buf, buffer_from_fifo32(), I2C_8BIT, I2C_ACT2NAK, I2C_CLEANI, rk_i2c_regs::i2c_con, I2C_EN, i2c_info, rk_i2c_regs::i2c_ipd, I2C_MBRFI, I2C_MODE_RX, I2C_MODE_TRX, rk_i2c_regs::i2c_mrxaddr, rk_i2c_regs::i2c_mrxcnt, rk_i2c_regs::i2c_mrxraddr, I2C_NAK, I2C_NAKRCVI, I2C_NOACK, I2C_TIMEOUT, i2c_msg::len, MIN, printk, read32(), rk_i2c_regs::rxdata, i2c_msg::slave, udelay(), and write32().

Referenced by i2c_do_xfer().

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◆ i2c_send_start()

static int i2c_send_start ( struct rk_i2c_regs * reg_addr )

static

Definition at line 69 of file i2c.c.

References BIOS_ERR, I2C_CLEANI, rk_i2c_regs::i2c_con, I2C_EN, i2c_info, rk_i2c_regs::i2c_ipd, I2C_START, I2C_STARTI, I2C_TIMEOUT, I2C_TIMEOUT_US, printk, read32(), udelay(), and write32().

Referenced by i2c_do_xfer().

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◆ i2c_send_stop()

static int i2c_send_stop ( struct rk_i2c_regs * reg_addr )

static

Definition at line 91 of file i2c.c.

References BIOS_ERR, I2C_CLEANI, rk_i2c_regs::i2c_con, I2C_EN, i2c_info, rk_i2c_regs::i2c_ipd, I2C_STOP, I2C_STOPI, I2C_TIMEOUT, I2C_TIMEOUT_US, printk, read32(), udelay(), and write32().

Referenced by i2c_do_xfer().

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◆ i2c_write()

static int i2c_write	(	struct rk_i2c_regs *	reg_addr,
		struct i2c_msg	segment
	)

static

Definition at line 159 of file i2c.c.

References BIOS_ERR, i2c_msg::buf, buffer_to_fifo32_prefix(), I2C_ACT2NAK, I2C_CLEANI, rk_i2c_regs::i2c_con, I2C_EN, i2c_info, rk_i2c_regs::i2c_ipd, I2C_MBTFI, I2C_MODE_TX, rk_i2c_regs::i2c_mtxcnt, I2C_NAKRCVI, I2C_NOACK, I2C_TIMEOUT, i2c_msg::len, MIN, printk, read32(), i2c_msg::slave, rk_i2c_regs::txdata, udelay(), and write32().

Referenced by i2c_do_xfer().

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◆ platform_i2c_transfer()

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

Definition at line 220 of file i2c.c.

References i2c_do_xfer().

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Variable Documentation

◆ i2c_bus

const uintptr_t i2c_bus[] = IC_BASES

static

Definition at line 41 of file i2c.c.

Referenced by read_edid_from_ps8640(), and ww_ring_init().

Data Structures

Macros

Functions

Variables

Macro Definition Documentation

◆ I2C_16BIT

◆ I2C_24BIT

◆ I2C_8BIT

◆ I2C_ACT2NAK

◆ I2C_BRFI

◆ I2C_BTFI

◆ I2C_BUS_MAX

◆ I2C_CLEANI

◆ I2C_CNT

◆ I2C_EN

◆ i2c_info

◆ I2C_MBRFI

◆ I2C_MBTFI

◆ I2C_MODE_RX

◆ I2C_MODE_TRX

◆ I2C_MODE_TX

◆ I2C_NAK

◆ I2C_NAKRCVI

◆ I2C_NOACK

◆ I2C_START

◆ I2C_STARTI

◆ I2C_STOP

◆ I2C_STOPI

◆ I2C_TIMEOUT

◆ I2C_TIMEOUT_US

◆ RETRY_COUNT

Function Documentation

◆ i2c_do_xfer()

◆ i2c_init()

◆ i2c_read()

◆ i2c_send_start()

◆ i2c_send_stop()

◆ i2c_write()

◆ platform_i2c_transfer()

Variable Documentation

◆ i2c_bus