spi.c File Reference

#include <device/mmio.h>
#include <assert.h>
#include <console/console.h>
#include <delay.h>
#include <endian.h>
#include <soc/addressmap.h>
#include <soc/spi.h>
#include <soc/clock.h>
#include <spi-generic.h>
#include <spi_flash.h>
#include <timer.h>
#include <types.h>

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Data Structures
struct	rockchip_spi_slave

Macros
#define	SPI_TIMEOUT_US   1000
#define	SPI_SRCCLK_HZ   (198*MHz)
#define	SPI_FIFO_DEPTH   32

Functions
static struct rockchip_spi_slave *	to_rockchip_spi (const struct spi_slave *slave)
static void	spi_cs_activate (const struct spi_slave *slave)
static void	spi_cs_deactivate (const struct spi_slave *slave)
static void	rockchip_spi_enable_chip (struct rockchip_spi *regs, int enable)
static void	rockchip_spi_set_clk (struct rockchip_spi *regs, unsigned int hz)
void	rockchip_spi_init (unsigned int bus, unsigned int 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	rockchip_spi_wait_till_not_busy (struct rockchip_spi *regs)
static void	set_tmod (struct rockchip_spi *regs, unsigned int tmod)
static void	set_transfer_mode (struct rockchip_spi *regs, unsigned int sout, unsigned int sin)
static int	do_xfer (struct rockchip_spi *regs, bool use_16bit, const void *dout, size_t *bytes_out, void *din, size_t *bytes_in)
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 struct rockchip_spi_slave	rockchip_spi_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)

Macro Definition Documentation

SPI_FIFO_DEPTH

#define SPI_FIFO_DEPTH   32

Definition at line 22 of file spi.c.

SPI_SRCCLK_HZ

#define SPI_SRCCLK_HZ   (198*MHz)

Definition at line 21 of file spi.c.

SPI_TIMEOUT_US

#define SPI_TIMEOUT_US   1000

Definition at line 20 of file spi.c.

Function Documentation

do_xfer()

static int do_xfer ( struct rockchip_spi *  regs, bool  use_16bit, const void *  dout, size_t *  bytes_out, void *  din, size_t *  bytes_in  )

static

Definition at line 180 of file spi.c.

References BIOS_ERR, buffer_from_fifo32(), MIN, printk, read32(), rockchip_spi_wait_till_not_busy(), RXFLR_LEVEL_MASK, SR_RF_EMPT, SR_TF_FULL, and write32().

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rockchip_spi_enable_chip()

static void rockchip_spi_enable_chip ( struct rockchip_spi *  regs, int  enable  )

static

Definition at line 69 of file spi.c.

References write32().

Referenced by rockchip_spi_init().

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rockchip_spi_init()

void rockchip_spi_init	(	unsigned int	bus,
		unsigned int	speed_hz
	)

Definition at line 84 of file spi.c.

rockchip_spi_set_clk()

static void rockchip_spi_set_clk ( struct rockchip_spi *  regs, unsigned int  hz  )

static

Definition at line 77 of file spi.c.

References assert, SPI_SRCCLK_HZ, and write32().

Referenced by rockchip_spi_init().

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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 122 of file spi.c.

rockchip_spi_wait_till_not_busy()

static int rockchip_spi_wait_till_not_busy ( struct rockchip_spi *  regs )

static

Definition at line 146 of file spi.c.

References BIOS_DEBUG, printk, read32(), SPI_TIMEOUT_US, SR_BUSY, stopwatch_expired(), and stopwatch_init_usecs_expire().

Referenced by do_xfer().

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set_tmod()

static void set_tmod ( struct rockchip_spi *  regs, unsigned int  tmod  )

static

Definition at line 160 of file spi.c.

References clrsetbits32, SPI_TMOD_MASK, and SPI_TMOD_OFFSET.

Referenced by set_transfer_mode().

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set_transfer_mode()

static void set_transfer_mode ( struct rockchip_spi *  regs, unsigned int  sout, unsigned int  sin  )

static

Definition at line 166 of file spi.c.

References set_tmod(), SPI_TMOD_RO, SPI_TMOD_TO, and SPI_TMOD_TR.

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spi_cs_activate()

static void spi_cs_activate ( const struct spi_slave *  slave )

static

Definition at line 57 of file spi.c.

References rockchip_spi_slave::regs, setbits32, slave, and to_rockchip_spi().

Referenced by spi_ctrlr_claim_bus().

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spi_cs_deactivate()

static void spi_cs_deactivate ( const struct spi_slave *  slave )

static

Definition at line 63 of file spi.c.

References clrbits32, rockchip_spi_slave::regs, slave, and to_rockchip_spi().

Referenced by spi_ctrlr_release_bus().

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 135 of file spi.c.

References slave, and spi_cs_activate().

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spi_ctrlr_release_bus()

static void spi_ctrlr_release_bus ( const struct spi_slave *  slave )

static

Definition at line 141 of file spi.c.

References slave, and spi_cs_deactivate().

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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 229 of file spi.c.

to_rockchip_spi()

static struct rockchip_spi_slave* to_rockchip_spi ( const struct spi_slave *  slave )

static

Definition at line 51 of file spi.c.

References ARRAY_SIZE, assert, spi_slave::bus, rockchip_spi_slaves, and slave.

Referenced by spi_cs_activate(), and spi_cs_deactivate().

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Variable Documentation

rockchip_spi_slaves

struct rockchip_spi_slave rockchip_spi_slaves[]

static

Initial value:

= {
        {
         .regs = (void *)SPI0_BASE,
        },
        {
         .regs = (void *)SPI1_BASE,
        },
        {
         .regs = (void *)SPI2_BASE,
        },
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
}

Definition at line 1 of file spi.c.

Referenced by rockchip_spi_init(), rockchip_spi_set_sample_delay(), and to_rockchip_spi().

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 229 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 = ARRAY_SIZE(rockchip_spi_slaves) - 1,
        },
}

Definition at line 229 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 316 of file spi.c.