spi.c File Reference

#include <device/mmio.h>
#include <assert.h>
#include <cbfs.h>
#include <console/console.h>
#include <soc/cpu.h>
#include <soc/spi.h>
#include <spi-generic.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <symbols.h>

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Data Structures
struct	exynos_spi_slave

Macros
#define	EXYNOS_SPI_MAX_TRANSFER_BYTES   (65535)
#define	DEBUG_SPI(x, ...)

Functions
static struct exynos_spi_slave *	to_exynos_spi (const struct spi_slave *slave)
static void	spi_sw_reset (struct exynos_spi *regs, int word)
static void	exynos_spi_init (struct exynos_spi *regs)
static int	spi_ctrlr_claim_bus (const struct spi_slave *slave)
static void	spi_transfer (struct exynos_spi *regs, void *in, const void *out, size_t size)
static int	spi_ctrlr_xfer (const struct spi_slave *slave, const void *dout, size_t bytes_out, void *din, size_t bytes_in)
static void	spi_ctrlr_release_bus (const struct spi_slave *slave)
static int	spi_ctrlr_setup (const struct spi_slave *slave)
static int	exynos_spi_read (struct spi_slave *slave, void *dest, uint32_t len, uint32_t off)
static ssize_t	exynos_spi_readat (const struct region_device *rdev, void *dest, size_t offset, size_t count)
static void *	exynos_spi_map (const struct region_device *rdev, size_t offset, size_t count)
void	exynos_init_spi_boot_device (void)
const struct region_device *	exynos_spi_boot_device (void)

Variables
static struct exynos_spi_slave	exynos_spi_slaves [3]
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)
static struct exynos_spi_slave *	boot_slave
static const struct region_device_ops	exynos_spi_ops
static struct mmap_helper_region_device	mdev

Macro Definition Documentation

DEBUG_SPI

#define DEBUG_SPI	(		x,
			...
	)

Definition at line 20 of file spi.c.

EXYNOS_SPI_MAX_TRANSFER_BYTES

#define EXYNOS_SPI_MAX_TRANSFER_BYTES   (65535)

Definition at line 15 of file spi.c.

Function Documentation

exynos_init_spi_boot_device()

void exynos_init_spi_boot_device

(

void

)

Definition at line 274 of file spi.c.

References boot_slave, boot_slave_regs, EXYNOS5_SPI1_BASE, and exynos_spi_slaves.

Referenced by boot_device_init().

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exynos_spi_boot_device()

const struct region_device* exynos_spi_boot_device

(

void

)

Definition at line 279 of file spi.c.

References mdev, and mmap_helper_region_device::rdev.

Referenced by boot_device_ro().

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exynos_spi_init()

static void exynos_spi_init ( struct exynos_spi *  regs )

static

Definition at line 86 of file spi.c.

References clrbits32, setbits32, SPI_CH_CPOL_L, SPI_CH_HS_EN, SPI_FB_DELAY_180, SPI_RX_BYTE_SWAP, SPI_RX_CH_ON, SPI_RX_HWORD_SWAP, SPI_RX_SWAP_EN, spi_sw_reset(), SPI_TX_CH_ON, and write32().

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exynos_spi_map()

static void* exynos_spi_map ( const struct region_device *  rdev, size_t  offset, size_t  count  )

static

Definition at line 254 of file spi.c.

References count, DEBUG_SPI, mmap_helper_rdev_mmap(), offset, and rdev.

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exynos_spi_read()

static int exynos_spi_read ( struct spi_slave *  slave, void *  dest, uint32_t  len, uint32_t  off  )

static

Definition at line 226 of file spi.c.

References ASSERT, htonl, NULL, exynos_spi_slave::regs, SF_READ_DATA_CMD, slave, spi_claim_bus(), spi_release_bus(), spi_transfer(), and to_exynos_spi().

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exynos_spi_readat()

static ssize_t exynos_spi_readat ( const struct region_device *  rdev, void *  dest, size_t  offset, size_t  count  )

static

Definition at line 247 of file spi.c.

References boot_slave, count, DEBUG_SPI, exynos_spi_read(), offset, and exynos_spi_slave::slave.

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 104 of file spi.c.

References clrbits32, exynos_spi_slave::regs, slave, SPI_SLAVE_SIG_INACT, and to_exynos_spi().

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spi_ctrlr_release_bus()

static void spi_ctrlr_release_bus ( const struct spi_slave *  slave )

static

Definition at line 189 of file spi.c.

References exynos_spi_slave::regs, setbits32, slave, SPI_SLAVE_SIG_INACT, and to_exynos_spi().

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spi_ctrlr_setup()

static int spi_ctrlr_setup ( const struct spi_slave *  slave )

static

Definition at line 195 of file spi.c.

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 164 of file spi.c.

References MIN, NULL, exynos_spi_slave::regs, slave, spi_transfer(), and to_exynos_spi().

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spi_sw_reset()

static void spi_sw_reset ( struct exynos_spi *  regs, int  word  )

static

Definition at line 54 of file spi.c.

References clrbits32, read32(), setbits32, SPI_CH_RST, SPI_MODE_BUS_WIDTH_BYTE, SPI_MODE_BUS_WIDTH_MASK, SPI_MODE_BUS_WIDTH_WORD, SPI_MODE_CH_WIDTH_BYTE, SPI_MODE_CH_WIDTH_MASK, SPI_MODE_CH_WIDTH_WORD, SPI_RX_BYTE_SWAP, SPI_RX_CH_ON, SPI_RX_HWORD_SWAP, SPI_RX_SWAP_EN, SPI_TX_BYTE_SWAP, SPI_TX_CH_ON, SPI_TX_HWORD_SWAP, SPI_TX_SWAP_EN, word, and write32().

Referenced by exynos_spi_init(), and spi_transfer().

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spi_transfer()

static void spi_transfer ( struct exynos_spi *  regs, void *  in, const void *  out, size_t  size  )

static

Definition at line 112 of file spi.c.

References inb(), memcpy(), MIN, outb(), read32(), SPI_PACKET_CNT_EN, exynos_spi::spi_sts, spi_sw_reset(), width, and write32().

Referenced by exynos_spi_read(), and spi_ctrlr_xfer().

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to_exynos_spi()

static struct exynos_spi_slave* to_exynos_spi ( const struct spi_slave *  slave )

inlinestatic

Definition at line 49 of file spi.c.

References spi_slave::bus, exynos_spi_slaves, and slave.

Referenced by exynos_spi_read(), spi_ctrlr_claim_bus(), spi_ctrlr_release_bus(), and spi_ctrlr_xfer().

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Variable Documentation

boot_slave

struct exynos_spi_slave* boot_slave

static

Definition at line 245 of file spi.c.

Referenced by exynos_init_spi_boot_device(), and exynos_spi_readat().

exynos_spi_ops

const struct region_device_ops exynos_spi_ops

static

Initial value:

= {
        .mmap = exynos_spi_map,
        .munmap = mmap_helper_rdev_munmap,
        .readat = exynos_spi_readat,
}

Definition at line 254 of file spi.c.

exynos_spi_slaves

struct exynos_spi_slave exynos_spi_slaves[3]

static

Initial value:

= {
        
        {
                .slave = { .bus = 0, },
                .regs = (void *)EXYNOS5_SPI0_BASE,
        },
        
        {
                .slave = { .bus = 1, },
                .regs = (void *)EXYNOS5_SPI1_BASE,
        },
        
        {
                .slave = { .bus = 2, },
                .regs = (void *)EXYNOS5_SPI2_BASE,
        },
}

Definition at line 1 of file spi.c.

Referenced by exynos_init_spi_boot_device(), and to_exynos_spi().

mdev

struct mmap_helper_region_device mdev

static

Initial value:

=
        MMAP_HELPER_DEV_INIT(&exynos_spi_ops, 0, CONFIG_ROM_SIZE, &cbfs_cache)

Definition at line 254 of file spi.c.

spi_ctrlr

const struct spi_ctrlr spi_ctrlr

static

Initial value:

= {
        .setup = spi_ctrlr_setup,
        .claim_bus = spi_ctrlr_claim_bus,
        .release_bus = spi_ctrlr_release_bus,
        .xfer = spi_ctrlr_xfer,
        .max_xfer_size = SPI_CTRLR_DEFAULT_MAX_XFER_SIZE,
}

Definition at line 195 of file spi.c.

spi_ctrlr_bus_map

const struct spi_ctrlr_buses spi_ctrlr_bus_map[]

Initial value:

= {
        {
                .ctrlr = &spi_ctrlr,
                .bus_start = 0,
                .bus_end = 2,
        },
}

Definition at line 195 of file spi.c.

spi_ctrlr_bus_map_count

const size_t spi_ctrlr_bus_map_count = ARRAY_SIZE(spi_ctrlr_bus_map)

Definition at line 224 of file spi.c.