spi_bitbang.c File Reference

#include <assert.h>
#include <gpio.h>
#include <soc/spi.h>
#include <spi_bitbang.h>
#include <spi_flash.h>
#include <stddef.h>

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Data Structures
struct	rockchip_bitbang_slave

Functions
static int	get_miso (const struct spi_bitbang_ops *ops)
static void	set_mosi (const struct spi_bitbang_ops *ops, int value)
static void	set_clk (const struct spi_bitbang_ops *ops, int value)
static void	set_cs (const struct spi_bitbang_ops *ops, int value)
void	rockchip_spi_init (unsigned int bus, unsigned int ignored_speed_hz)
void	rockchip_spi_set_sample_delay (unsigned int bus, unsigned int delay_ns)
static int	spi_ctrlr_claim_bus (const struct spi_slave *slave)
static void	spi_ctrlr_release_bus (const struct spi_slave *slave)
static int	spi_ctrlr_xfer (const struct spi_slave *slave, const void *dout, size_t bytes_out, void *din, size_t bytes_in)

Variables
static const struct rockchip_bitbang_slave	slaves []
static const struct spi_ctrlr	spi_ctrlr
const struct spi_ctrlr_buses	spi_ctrlr_bus_map []
const size_t	spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map)

Function Documentation

get_miso()

static int get_miso ( const struct spi_bitbang_ops *  ops )

static

Definition at line 21 of file spi_bitbang.c.

References container_of, gpio_get(), ops, and slave.

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rockchip_spi_init()

void rockchip_spi_init	(	unsigned int	bus,
		unsigned int	ignored_speed_hz
	)

Definition at line 95 of file spi_bitbang.c.

References ARRAY_SIZE, assert, rockchip_bitbang_slave::clk, rockchip_bitbang_slave::cs, rockchip_spi::ctrlr0, gpio_input(), gpio_output(), rockchip_bitbang_slave::miso, rockchip_bitbang_slave::mosi, rockchip_spi_slave::regs, rkclk_configure_spi(), rockchip_spi_enable_chip(), rockchip_spi_set_clk(), rockchip_spi_slaves, slaves, SPI_CSM_KEEP, SPI_CSM_OFFSET, SPI_DFS_8BIT, SPI_DFS_OFFSET, SPI_FBM_MSB, SPI_FBM_OFFSET, SPI_FIFO_DEPTH, SPI_FRF_OFFSET, SPI_FRF_SPI, SPI_OMOD_MASTER, SPI_OMOD_OFFSET, SPI_SEM_LITTLE, SPI_SEM_OFFSET, SPI_SRCCLK_HZ, SPI_SSN_DELAY_OFFSET, SPI_SSN_DELAY_ONE, and write32().

Referenced by bootblock_mainboard_init(), configure_ec(), configure_spi_flash(), and configure_tpm().

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rockchip_spi_set_sample_delay()

void rockchip_spi_set_sample_delay	(	unsigned int	bus,
		unsigned int	delay_ns
	)

Definition at line 105 of file spi_bitbang.c.

References ARRAY_SIZE, assert, clrsetbits32, DIV_ROUND_CLOSEST, GHz, rockchip_spi_slave::regs, rockchip_spi_slaves, SPI_RXDSD_MASK, SPI_RXDSD_OFFSET, and SPI_SRCCLK_HZ.

Referenced by configure_spi_flash().

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set_clk()

static void set_clk ( const struct spi_bitbang_ops *  ops, int  value  )

static

Definition at line 35 of file spi_bitbang.c.

References container_of, gpio_set(), ops, slave, and value.

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set_cs()

static void set_cs ( const struct spi_bitbang_ops *  ops, int  value  )

static

Definition at line 42 of file spi_bitbang.c.

References container_of, spi_slave::cs, gpio_set(), ops, slave, and value.

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set_mosi()

static void set_mosi ( const struct spi_bitbang_ops *  ops, int  value  )

static

Definition at line 28 of file spi_bitbang.c.

References container_of, gpio_set(), ops, slave, and value.

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 110 of file spi_bitbang.c.

References ARRAY_SIZE, assert, spi_slave::bus, rockchip_bitbang_slave::ops, slave, slaves, and spi_bitbang_claim_bus().

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spi_ctrlr_release_bus()

static void spi_ctrlr_release_bus ( const struct spi_slave *  slave )

static

Definition at line 116 of file spi_bitbang.c.

References ARRAY_SIZE, assert, spi_slave::bus, rockchip_bitbang_slave::ops, slave, slaves, and spi_bitbang_release_bus().

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spi_ctrlr_xfer()

static int spi_ctrlr_xfer ( const struct spi_slave *  slave, const void *  dout, size_t  bytes_out, void *  din, size_t  bytes_in  )

static

Definition at line 122 of file spi_bitbang.c.

Variable Documentation

slaves

const struct rockchip_bitbang_slave slaves[]

static

Definition at line 42 of file spi_bitbang.c.

Referenced by rockchip_spi_init(), spi_ctrlr_claim_bus(), and spi_ctrlr_release_bus().

spi_ctrlr

const struct spi_ctrlr spi_ctrlr

static

Initial value:

= {
        .claim_bus = spi_ctrlr_claim_bus,
        .release_bus = spi_ctrlr_release_bus,
        .xfer = spi_ctrlr_xfer,
        .max_xfer_size = 65535,
}

Definition at line 122 of file spi_bitbang.c.

spi_ctrlr_bus_map

const struct spi_ctrlr_buses spi_ctrlr_bus_map[]

Initial value:

= {
        {
                .ctrlr = &spi_ctrlr,
                .bus_start = 0,
                .bus_end = ARRAY_SIZE(slaves) - 1,
        },
}

Definition at line 122 of file spi_bitbang.c.

spi_ctrlr_bus_map_count

const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map)

Definition at line 145 of file spi_bitbang.c.