spi.c File Reference

#include <device/mmio.h>
#include <console/console.h>
#include <delay.h>
#include <gpio.h>
#include <soc/iomap.h>
#include <soc/spi.h>

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Functions
static int	check_bit_state (void *reg_addr, int mask, int val, int us_delay)
static int	check_qup_state_valid (struct ipq_spi_slave *ds)
static int	config_spi_state (struct ipq_spi_slave *ds, unsigned int state)
static void	spi_set_mode (struct ipq_spi_slave *ds, unsigned int mode)
static void	spi_reset (struct ipq_spi_slave *ds)
static struct ipq_spi_slave *	to_ipq_spi (const struct spi_slave *slave)
static int	spi_hw_init (struct ipq_spi_slave *ds)
static int	spi_ctrlr_claim_bus (const struct spi_slave *slave)
static void	spi_ctrlr_release_bus (const struct spi_slave *slave)
static void	write_force_cs (const struct spi_slave *slave, int assert)
static void	spi_write_byte (struct ipq_spi_slave *ds, unsigned char data)
static unsigned char	spi_read_byte (struct ipq_spi_slave *ds)
static int	check_fifo_status (void *reg_addr)
static void	enable_io_config (struct ipq_spi_slave *ds, uint32_t write_cnt, uint32_t read_cnt)
static int	__blsp_spi_read (struct ipq_spi_slave *ds, u8 *data_buffer, unsigned int bytes)
static int	blsp_spi_read (struct ipq_spi_slave *ds, u8 *data_buffer, unsigned int bytes)
static int	__blsp_spi_write (struct ipq_spi_slave *ds, const u8 *cmd_buffer, unsigned int bytes)
static int	blsp_spi_write (struct ipq_spi_slave *ds, u8 *cmd_buffer, unsigned int bytes)
static int	spi_ctrlr_xfer (const struct spi_slave *slave, const void *dout, size_t out_bytes, void *din, size_t in_bytes)
static int	spi_ctrlr_setup (const struct spi_slave *slave)

Variables
static const struct blsp_spi	spi_reg []
static struct ipq_spi_slave	spi_slave_pool [2]
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

__blsp_spi_read()

static int __blsp_spi_read ( struct ipq_spi_slave *  ds, u8 *  data_buffer, unsigned int  bytes  )

static

Definition at line 379 of file spi.c.

References check_fifo_status(), config_spi_state(), enable_io_config(), INPUT_SERVICE_FLAG, blsp_spi::qup_mx_input_count, blsp_spi::qup_operational, QUP_STATE_RESET, QUP_STATE_RUN, read32(), ipq_spi_slave::regs, SPI_INPUT_BLOCK_SIZE, spi_read_byte(), SUCCESS, val, void(), and write32().

Referenced by blsp_spi_read().

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__blsp_spi_write()

static int __blsp_spi_write ( struct ipq_spi_slave *  ds, const u8 *  cmd_buffer, unsigned int  bytes  )

static

Definition at line 458 of file spi.c.

References check_fifo_status(), config_spi_state(), enable_io_config(), INPUT_SERVICE_FLAG, OUTPUT_SERVICE_FLAG, blsp_spi::qup_mx_input_count, blsp_spi::qup_mx_output_count, blsp_spi::qup_operational, QUP_STATE_RESET, QUP_STATE_RUN, read32(), ipq_spi_slave::regs, SPI_INPUT_BLOCK_SIZE, SPI_OUTPUT_BLOCK_SIZE, spi_read_byte(), spi_write_byte(), SUCCESS, val, void(), and write32().

Referenced by blsp_spi_write().

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blsp_spi_read()

static int blsp_spi_read ( struct ipq_spi_slave *  ds, u8 *  data_buffer, unsigned int  bytes  )

static

Definition at line 436 of file spi.c.

References __blsp_spi_read(), length, MAX_COUNT_SIZE, and SUCCESS.

Referenced by spi_ctrlr_xfer().

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blsp_spi_write()

static int blsp_spi_write ( struct ipq_spi_slave *  ds, u8 *  cmd_buffer, unsigned int  bytes  )

static

Definition at line 552 of file spi.c.

References __blsp_spi_write(), length, MAX_COUNT_SIZE, and SUCCESS.

Referenced by spi_ctrlr_xfer().

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check_bit_state()

static int check_bit_state ( void *  reg_addr, int  mask, int  val, int  us_delay  )

static

Definition at line 57 of file spi.c.

References count, ETIMEDOUT, mask, read32(), SUCCESS, TIMEOUT_CNT, udelay(), and val.

Referenced by check_qup_state_valid().

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check_fifo_status()

static int check_fifo_status ( void *  reg_addr )

static

Definition at line 333 of file spi.c.

References count, ETIMEDOUT, INPUT_SERVICE_FLAG, OUTPUT_SERVICE_FLAG, read32(), SUCCESS, TIMEOUT_CNT, and val.

Referenced by __blsp_spi_read(), and __blsp_spi_write().

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check_qup_state_valid()

static int check_qup_state_valid ( struct ipq_spi_slave *  ds )

static

Definition at line 75 of file spi.c.

References check_bit_state(), blsp_spi::qup_state, QUP_STATE_VALID, QUP_STATE_VALID_MASK, and ipq_spi_slave::regs.

Referenced by config_spi_state(), and spi_reset().

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config_spi_state()

static int config_spi_state ( struct ipq_spi_slave *  ds, unsigned int  state  )

static

Definition at line 86 of file spi.c.

References BIOS_ERR, check_qup_state_valid(), EINVAL, printk, blsp_spi::qup_state, QUP_STATE_MASK, QUP_STATE_RESET, QUP_STATE_RUN, read32(), ipq_spi_slave::regs, SUCCESS, val, and write32().

Referenced by __blsp_spi_read(), __blsp_spi_write(), spi_ctrlr_xfer(), and spi_hw_init().

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enable_io_config()

static void enable_io_config ( struct ipq_spi_slave *  ds, uint32_t  write_cnt, uint32_t  read_cnt  )

static

Definition at line 354 of file spi.c.

References clrsetbits32, QUP_CONF_INPUT_ENA, QUP_CONF_INPUT_MSK, QUP_CONF_NO_INPUT, QUP_CONF_NO_OUTPUT, QUP_CONF_OUTPUT_ENA, QUP_CONF_OUTPUT_MSK, blsp_spi::qup_config, and ipq_spi_slave::regs.

Referenced by __blsp_spi_read(), and __blsp_spi_write().

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 269 of file spi.c.

References EIO, slave, spi_hw_init(), SUCCESS, and to_ipq_spi().

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spi_ctrlr_release_bus()

static void spi_ctrlr_release_bus ( const struct spi_slave *  slave )

static

Definition at line 281 of file spi.c.

References ipq_spi_slave::initialized, slave, spi_reset(), and to_ipq_spi().

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spi_ctrlr_setup()

static int spi_ctrlr_setup ( const struct spi_slave *  slave )

static

Definition at line 617 of file spi.c.

spi_ctrlr_xfer()

static int spi_ctrlr_xfer ( const struct spi_slave *  slave, const void *  dout, size_t  out_bytes, void *  din, size_t  in_bytes  )

static

Definition at line 575 of file spi.c.

References blsp_spi_read(), blsp_spi_write(), config_spi_state(), NULL, QUP_STATE_RESET, slave, SUCCESS, to_ipq_spi(), void(), and write_force_cs().

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spi_hw_init()

static int spi_hw_init ( struct ipq_spi_slave *  ds )

static

Definition at line 197 of file spi.c.

References clrsetbits32, config_spi_state(), blsp_spi::error_flags_en, ipq_spi_slave::initialized, blsp_spi::io_control, ipq_spi_slave::mode, QUP_CONF_INPUT_ENA, QUP_CONF_INPUT_MSK, QUP_CONF_N_MASK, QUP_CONF_N_SPI_8_BIT_WORD, QUP_CONF_OUTPUT_ENA, QUP_CONF_OUTPUT_MSK, blsp_spi::qup_config, QUP_CONFIG_MINI_CORE_MSK, QUP_CONFIG_MINI_CORE_SPI, blsp_spi::qup_deassert_wait, blsp_spi::qup_error_flags_en, blsp_spi::qup_io_modes, QUP_IO_MODES_INPUT_BLOCK_MODE, QUP_IO_MODES_INPUT_MODE_MSK, QUP_IO_MODES_OUTPUT_BIT_SHIFT_EN, QUP_IO_MODES_OUTPUT_BIT_SHIFT_MSK, QUP_IO_MODES_OUTPUT_BLOCK_MODE, QUP_IO_MODES_OUTPUT_MODE_MSK, QUP_STATE_RESET, ipq_spi_slave::regs, blsp_spi::spi_config, SPI_CONFIG_LOOP_BACK_MSK, SPI_CONFIG_NO_LOOP_BACK, SPI_CONFIG_NO_SLAVE_OPER, SPI_CONFIG_NO_SLAVE_OPER_MSK, SPI_IO_CTRL_CLK_ALWAYS_ON, SPI_IO_CTRL_NO_TRI_STATE, spi_reset(), spi_set_mode(), SUCCESS, and write32().

Referenced by spi_ctrlr_claim_bus().

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spi_read_byte()

static unsigned char spi_read_byte ( struct ipq_spi_slave *  ds )

static

Definition at line 319 of file spi.c.

References INPUT_FIFO_NOT_EMPTY, blsp_spi::qup_input_fifo, blsp_spi::qup_operational, read32(), ipq_spi_slave::regs, and udelay().

Referenced by __blsp_spi_read(), and __blsp_spi_write().

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spi_reset()

static void spi_reset ( struct ipq_spi_slave *  ds )

static

Definition at line 166 of file spi.c.

References check_qup_state_valid(), blsp_spi::qup_sw_reset, ipq_spi_slave::regs, udelay(), and write32().

Referenced by spi_ctrlr_release_bus(), and spi_hw_init().

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spi_set_mode()

static void spi_set_mode ( struct ipq_spi_slave *  ds, unsigned int  mode  )

static

Definition at line 122 of file spi.c.

References BIOS_ERR, blsp_spi::io_control, printk, read32(), ipq_spi_slave::regs, blsp_spi::spi_config, SPI_CONFIG_INPUT_FIRST, SPI_IO_CTRL_CLOCK_IDLE_HIGH, SPI_MODE0, SPI_MODE1, SPI_MODE2, SPI_MODE3, val, and write32().

Referenced by spi_hw_init().

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spi_write_byte()

static void spi_write_byte ( struct ipq_spi_slave *  ds, unsigned char  data  )

static

Definition at line 306 of file spi.c.

References OUTPUT_FIFO_FULL, blsp_spi::qup_operational, blsp_spi::qup_output_fifo, read32(), ipq_spi_slave::regs, udelay(), and write32().

Referenced by __blsp_spi_write().

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to_ipq_spi()

static struct ipq_spi_slave* to_ipq_spi ( const struct spi_slave *  slave )

static

Definition at line 175 of file spi.c.

References ipq_spi_slave::allocated, ARRAY_SIZE, spi_slave::bus, spi_slave::cs, NULL, slave, ipq_spi_slave::slave, and spi_slave_pool.

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

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write_force_cs()

static void write_force_cs ( const struct spi_slave *  slave, int  assert  )

static

Definition at line 290 of file spi.c.

References assert, clrsetbits32, blsp_spi::io_control, ipq_spi_slave::regs, slave, SPI_IO_CTRL_FORCE_CS_DIS, SPI_IO_CTRL_FORCE_CS_EN, SPI_IO_CTRL_FORCE_CS_MSK, and to_ipq_spi().

Referenced by spi_ctrlr_xfer().

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Variable Documentation

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 = MAX_PACKET_COUNT,
}

Definition at line 617 of file spi.c.

spi_ctrlr_bus_map

const struct spi_ctrlr_buses spi_ctrlr_bus_map[]

Initial value:

= {
        {
                .ctrlr = &spi_ctrlr,
                .bus_start = BLSP0_SPI,
                .bus_end = BLSP1_SPI,
        },
}

Definition at line 617 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 674 of file spi.c.

spi_reg

const struct blsp_spi spi_reg[]

static

Definition at line 1 of file spi.c.

spi_slave_pool

struct ipq_spi_slave spi_slave_pool[2]

static

Definition at line 166 of file spi.c.

Referenced by to_ipq_spi().