software_i2c.c File Reference

#include <device/mmio.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <gpio.h>
#include <soc/grf.h>
#include <soc/i2c.h>
#include <soc/pmu.h>

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Functions
static int	get_scl (unsigned int bus)
static int	get_sda (unsigned int bus)
static void	set_scl (unsigned int bus, int high)
static void	set_sda (unsigned int bus, int high)
void	software_i2c_attach (unsigned int bus)
void	software_i2c_detach (unsigned int bus)

Variables
struct {
gpio_t   scl
gpio_t   sda
}	pins []
static struct software_i2c_ops	rk_ops

Function Documentation

get_scl()

static int get_scl ( unsigned int  bus )

static

Definition at line 23 of file software_i2c.c.

References gpio_get(), pins, and scl.

Referenced by __wait(), in_bit(), out_bit(), software_i2c_wedge_ack(), software_i2c_wedge_read(), software_i2c_wedge_write(), start_cond(), and stop_cond().

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get_sda()

static int get_sda ( unsigned int  bus )

static

Definition at line 28 of file software_i2c.c.

References gpio_get(), pins, and sda.

Referenced by __wait(), out_bit(), software_i2c_wedge_ack(), software_i2c_wedge_read(), software_i2c_wedge_write(), start_cond(), and stop_cond().

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set_scl()

static void set_scl ( unsigned int  bus, int  high  )

static

Definition at line 33 of file software_i2c.c.

References gpio_input_pullup(), gpio_output(), pins, and scl.

Referenced by software_i2c_attach().

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set_sda()

static void set_sda ( unsigned int  bus, int  high  )

static

Definition at line 41 of file software_i2c.c.

Referenced by software_i2c_attach().

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software_i2c_attach()

void software_i2c_attach

(

unsigned int

bus

)

Definition at line 56 of file software_i2c.c.

References clrbits32, die(), IOMUX_GPIO, rk3288_pmu_regs::iomux_i2c0scl, IOMUX_I2C0SCL, rk3288_pmu_regs::iomux_i2c0sda, IOMUX_I2C0SDA, rk3288_grf_regs::iomux_i2c1, IOMUX_I2C1, rk3288_grf_regs::iomux_i2c2, IOMUX_I2C2, rk3288_grf_regs::iomux_i2c3, IOMUX_I2C3, rk3288_grf_regs::iomux_i2c4, IOMUX_I2C4, rk3288_grf_regs::iomux_i2c5scl, IOMUX_I2C5SCL, rk3288_grf_regs::iomux_i2c5sda, IOMUX_I2C5SDA, rk3288_grf, rk3288_pmu, rk_ops, set_scl(), set_sda(), software_i2c, and write32().

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software_i2c_detach()

void software_i2c_detach

(

unsigned int

bus

)

Definition at line 91 of file software_i2c.c.

References die(), rk3288_pmu_regs::iomux_i2c0scl, IOMUX_I2C0SCL, rk3288_pmu_regs::iomux_i2c0sda, IOMUX_I2C0SDA, rk3288_grf_regs::iomux_i2c1, IOMUX_I2C1, rk3288_grf_regs::iomux_i2c2, IOMUX_I2C2, rk3288_grf_regs::iomux_i2c3, IOMUX_I2C3, rk3288_grf_regs::iomux_i2c4, IOMUX_I2C4, rk3288_grf_regs::iomux_i2c5scl, IOMUX_I2C5SCL, rk3288_grf_regs::iomux_i2c5sda, IOMUX_I2C5SDA, NULL, rk3288_grf, rk3288_pmu, setbits32, software_i2c, and write32().

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Variable Documentation

struct { ... } pins[]

Initial value:

= {
        [0]{.scl = GPIO(0, C, 0), .sda = GPIO(0, B, 7)},
        [1]{.scl = GPIO(8, A, 5), .sda = GPIO(8, A, 4)},
        [2]{.scl = GPIO(6, B, 2), .sda = GPIO(6, B, 1)},
        [3]{.scl = GPIO(2, C, 0), .sda = GPIO(2, C, 1)},
        [4]{.scl = GPIO(7, C, 2), .sda = GPIO(7, C, 1)},
        [5]{.scl = GPIO(7, C, 4), .sda = GPIO(7, C, 3)},
}

Referenced by get_scl(), get_sda(), and set_scl().

rk_ops

struct software_i2c_ops rk_ops

static

Initial value:

= {
        .get_scl = get_scl,
        .get_sda = get_sda,
        .set_scl = set_scl,
        .set_sda = set_sda,
}

Definition at line 41 of file software_i2c.c.

Referenced by software_i2c_attach().

scl

gpio_t scl

Definition at line 12 of file software_i2c.c.

sda

gpio_t sda

Definition at line 13 of file software_i2c.c.