spi.c File Reference

#include <device/mmio.h>
#include <assert.h>
#include <console/console.h>
#include <endian.h>
#include <gpio.h>
#include <soc/pll.h>
#include <soc/spi.h>
#include <timer.h>
#include <types.h>

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Macros
#define	MTK_SPI_DEBUG   0

Enumerations
enum	{ MTK_FIFO_DEPTH = 32 , MTK_TXRX_TIMEOUT_US = 1000 * 1000 , MTK_ARBITRARY_VALUE = 0xdeaddead }
enum	{ MTK_SPI_IDLE = 0 , MTK_SPI_PAUSE_IDLE = 1 }
enum	{ MTK_SPI_BUSY_STATUS = 1 , MTK_SPI_PAUSE_FINISH_INT_STATUS = 3 }

Functions
static struct mtk_spi_bus *	to_mtk_spi (const struct spi_slave *slave)
void	mtk_spi_set_timing (struct mtk_spi_regs *regs, u32 sck_ticks, u32 cs_ticks, unsigned int tick_dly)
static void	spi_sw_reset (struct mtk_spi_regs *regs)
void	mtk_spi_init (unsigned int bus, enum spi_pad_mask pad_select, unsigned int speed_hz, unsigned int tick_dly)
static void	mtk_spi_dump_data (const char *name, const uint8_t *data, int size)
static int	spi_ctrlr_claim_bus (const struct spi_slave *slave)
static int	do_transfer (const struct spi_slave *slave, void *in, const void *out, size_t *bytes_in, size_t *bytes_out)
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)

Variables
const struct spi_ctrlr	spi_ctrlr

Macro Definition Documentation

MTK_SPI_DEBUG

#define MTK_SPI_DEBUG   0

Definition at line 13 of file spi.c.

Enumeration Type Documentation

anonymous enum

anonymous enum

Enumerator
MTK_FIFO_DEPTH
MTK_TXRX_TIMEOUT_US
MTK_ARBITRARY_VALUE

Definition at line 15 of file spi.c.

anonymous enum

anonymous enum

Enumerator
MTK_SPI_IDLE
MTK_SPI_PAUSE_IDLE

Definition at line 21 of file spi.c.

anonymous enum

anonymous enum

Enumerator
MTK_SPI_BUSY_STATUS
MTK_SPI_PAUSE_FINISH_INT_STATUS

Definition at line 26 of file spi.c.

Function Documentation

do_transfer()

static int do_transfer ( const struct spi_slave *  slave, void *  in, const void *  out, size_t *  bytes_in, size_t *  bytes_out  )

static

Definition at line 120 of file spi.c.

References BIOS_ERR, DIV_ROUND_UP, inb(), MIN, MTK_ARBITRARY_VALUE, MTK_SPI_BUSY_STATUS, mtk_spi_dump_data(), MTK_SPI_IDLE, MTK_SPI_PAUSE_FINISH_INT_STATUS, MTK_SPI_PAUSE_IDLE, MTK_TXRX_TIMEOUT_US, outb(), printk, read32(), mtk_spi_bus::regs, SET32_BITFIELDS, setbits32, slave, SPI_CMD_ACT_EN, SPI_CMD_RESUME_EN, spi_sw_reset(), mtk_spi_bus::state, stopwatch_expired(), stopwatch_init_usecs_expire(), to_mtk_spi(), and write32().

Referenced by spi_ctrlr_xfer().

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mtk_spi_dump_data()

static void mtk_spi_dump_data ( const char *  name, const uint8_t *  data, int  size  )

static

Definition at line 95 of file spi.c.

References BIOS_DEBUG, BIOS_INFO, MTK_SPI_DEBUG, name, and printk.

Referenced by do_transfer().

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mtk_spi_init()

void mtk_spi_init	(	unsigned int	bus,
		enum spi_pad_mask	pad_select,
		unsigned int	speed_hz,
		unsigned int	tick_dly
	)

Definition at line 56 of file spi.c.

References assert, BIOS_DEBUG, clrsetbits32, DIV_ROUND_UP, gpio_output(), mtk_spi_set_gpio_pinmux(), mtk_spi_set_timing(), printk, slave, spi_bus, SPI_BUS_NUMBER, SPI_CMD_CPHA_EN, SPI_CMD_CPOL_EN, SPI_CMD_DEASSERT_EN, SPI_CMD_FINISH_IE_EN, SPI_CMD_PAUSE_EN, SPI_CMD_PAUSE_IE_EN, SPI_CMD_RX_DMA_EN, SPI_CMD_RX_ENDIAN_EN, SPI_CMD_RXMSBF_EN, SPI_CMD_TX_DMA_EN, SPI_CMD_TX_ENDIAN_EN, SPI_CMD_TXMSBF_EN, SPI_HZ, and SPI_PAD_SEL_MASK.

Referenced by bootblock_mainboard_init(), and mainboard_early_init().

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mtk_spi_set_timing()

void mtk_spi_set_timing	(	struct mtk_spi_regs *	regs,
		u32	sck_ticks,
		u32	cs_ticks,
		unsigned int	tick_dly
	)

Definition at line 37 of file spi.c.

References GET_SCK_REG, and SET32_BITFIELDS.

Referenced by mtk_spi_init().

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 107 of file spi.c.

References mtk_spi_bus::cs_gpio, gpio_output(), MTK_SPI_IDLE, mtk_spi_bus::regs, setbits32, slave, SPI_CMD_PAUSE_EN_SHIFT, mtk_spi_bus::state, and to_mtk_spi().

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spi_ctrlr_release_bus()

static void spi_ctrlr_release_bus ( const struct spi_slave *  slave )

static

Definition at line 241 of file spi.c.

References clrbits32, mtk_spi_bus::cs_gpio, gpio_output(), MTK_SPI_IDLE, mtk_spi_bus::regs, slave, SPI_CMD_PAUSE_EN, spi_sw_reset(), mtk_spi_bus::state, and to_mtk_spi().

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spi_ctrlr_setup()

static int spi_ctrlr_setup ( const struct spi_slave *  slave )

static

Definition at line 253 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 212 of file spi.c.

References do_transfer(), MIN, MTK_FIFO_DEPTH, and slave.

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spi_sw_reset()

static void spi_sw_reset ( struct mtk_spi_regs *  regs )

static

Definition at line 50 of file spi.c.

References clrbits32, setbits32, and SPI_CMD_RST_EN.

Referenced by do_transfer(), and spi_ctrlr_release_bus().

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to_mtk_spi()

static struct mtk_spi_bus* to_mtk_spi ( const struct spi_slave *  slave )

inlinestatic

Definition at line 31 of file spi.c.

References assert, spi_slave::bus, slave, spi_bus, and SPI_BUS_NUMBER.

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

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Variable Documentation

spi_ctrlr

const struct spi_ctrlr spi_ctrlr

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 = 65535,
}

Definition at line 253 of file spi.c.