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>
#include <types.h>

Include dependency graph for spi.c:

Go to the source code of this file.

Macros
#define	SUCCESS   0
#define	DUMMY_DATA_VAL   0
#define	TIMEOUT_CNT   100
#define	CS_ASSERT   1
#define	CS_DEASSERT   0
#define	NUM_PORTS   3
#define	NUM_GSBI_PINS   3
#define	TLMM_ARGS   6
#define	NUM_CS   4
#define	GSBI_PIN_IDX   0
#define	FUNC_SEL_IDX   1
#define	GPIO_DIR_IDX   2
#define	PULL_CONF_IDX   3
#define	DRV_STR_IDX   4
#define	GPIO_EN_IDX   5
#define	ETIMEDOUT   -10
#define	EINVAL   -11
#define	EIO   -12
#define	GSBI_IDX_TO_GSBI(idx)   (idx + 5)
#define	MAX_PACKET_COUNT   ((64 * KiB) - 1)

Functions
static int	check_bit_state (uint32_t reg_addr, int bit_num, 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 int	check_hclk_state (unsigned int core_num, int enable)
static int	check_qup_clk_state (unsigned int core_num, int enable)
static void	CS_change (int port_num, int cs_num, int enable)
static void	gsbi_pin_config (unsigned int port_num, int cs_num)
static int	gsbi_clock_init (struct ipq_spi_slave *ds)
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 int	spi_xfer_tx_packet (struct ipq_spi_slave *ds, const uint8_t *dout, unsigned int out_bytes)
static int	spi_xfer_rx_packet (struct ipq_spi_slave *ds, uint8_t *din, unsigned int in_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 unsigned int	gsbi_pin_conf [NUM_PORTS][NUM_GSBI_PINS][TLMM_ARGS]
static unsigned int	cs_gpio_array [NUM_PORTS][NUM_CS]
static unsigned int	hclk_state [NUM_PORTS]
static unsigned int	qup_apps_clk_state [NUM_PORTS]
static const struct gsbi_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)

Macro Definition Documentation

CS_ASSERT

#define CS_ASSERT   1

Definition at line 15 of file spi.c.

CS_DEASSERT

#define CS_DEASSERT   0

Definition at line 16 of file spi.c.

DRV_STR_IDX

#define DRV_STR_IDX   4

Definition at line 25 of file spi.c.

DUMMY_DATA_VAL

#define DUMMY_DATA_VAL   0

Definition at line 13 of file spi.c.

EINVAL

#define EINVAL   -11

Definition at line 30 of file spi.c.

EIO

#define EIO   -12

Definition at line 31 of file spi.c.

ETIMEDOUT

#define ETIMEDOUT   -10

Definition at line 29 of file spi.c.

FUNC_SEL_IDX

#define FUNC_SEL_IDX   1

Definition at line 22 of file spi.c.

GPIO_DIR_IDX

#define GPIO_DIR_IDX   2

Definition at line 23 of file spi.c.

GPIO_EN_IDX

#define GPIO_EN_IDX   5

Definition at line 26 of file spi.c.

GSBI_IDX_TO_GSBI

#define GSBI_IDX_TO_GSBI

(

idx

)

(idx + 5)

Definition at line 33 of file spi.c.

GSBI_PIN_IDX

#define GSBI_PIN_IDX   0

Definition at line 21 of file spi.c.

MAX_PACKET_COUNT

#define MAX_PACKET_COUNT   ((64 * KiB) - 1)

Definition at line 37 of file spi.c.

NUM_CS

#define NUM_CS   4

Definition at line 20 of file spi.c.

NUM_GSBI_PINS

#define NUM_GSBI_PINS   3

Definition at line 18 of file spi.c.

NUM_PORTS

#define NUM_PORTS   3

Definition at line 17 of file spi.c.

PULL_CONF_IDX

#define PULL_CONF_IDX   3

Definition at line 24 of file spi.c.

SUCCESS

#define SUCCESS   0

Definition at line 11 of file spi.c.

TIMEOUT_CNT

#define TIMEOUT_CNT   100

Definition at line 14 of file spi.c.

TLMM_ARGS

#define TLMM_ARGS   6

Definition at line 19 of file spi.c.

Function Documentation

check_bit_state()

static int check_bit_state ( uint32_t  reg_addr, int  bit_num, int  val, int  us_delay  )

static

Definition at line 143 of file spi.c.

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

Referenced by check_hclk_state(), check_qup_clk_state(), and check_qup_state_valid().

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check_hclk_state()

static int check_hclk_state ( unsigned int  core_num, int  enable  )

static

Definition at line 257 of file spi.c.

References check_bit_state(), CLK_HALT_CFPB_STATEB_REG, and hclk_state.

Referenced by gsbi_clock_init().

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check_qup_clk_state()

static int check_qup_clk_state ( unsigned int  core_num, int  enable  )

static

Definition at line 266 of file spi.c.

References check_bit_state(), CLK_HALT_CFPB_STATEB_REG, and qup_apps_clk_state.

Referenced by gsbi_clock_init().

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check_qup_state_valid()

static int check_qup_state_valid ( struct ipq_spi_slave *  ds )

static

Definition at line 162 of file spi.c.

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

Referenced by config_spi_state().

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config_spi_state()

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

static

Definition at line 173 of file spi.c.

References BIOS_ERR, check_qup_state_valid(), EINVAL, printk, blsp_spi::qup_state, QUP_STATE_MASK, QUP_STATE_PAUSE_STATE, QUP_STATE_RESET_STATE, QUP_STATE_RUN_STATE, readl_i, ipq_spi_slave::regs, SPI_PAUSE_STATE, SPI_RESET_STATE, SPI_RUN_STATE, SUCCESS, val, and writel_i.

Referenced by spi_ctrlr_xfer(), spi_hw_init(), spi_xfer_rx_packet(), and spi_xfer_tx_packet().

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CS_change()

static void CS_change ( int  port_num, int  cs_num, int  enable  )

static

Definition at line 275 of file spi.c.

References addr, cs_gpio_array, GPIO_IN_OUT_ADDR, GPIO_OUTPUT, readl_i, val, and write32().

Referenced by gsbi_pin_config(), and spi_ctrlr_xfer().

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gsbi_clock_init()

static int gsbi_clock_init ( struct ipq_spi_slave *  ds )

static

Definition at line 331 of file spi.c.

References BIOS_ERR, spi_slave::bus, check_hclk_state(), check_qup_clk_state(), CLK_ROOT_DIS, CLK_ROOT_ENA, CLK_ROOT_ENA_MSK, clrsetbits32_i, GSBI1_RESET, GSBI1_RESET_MSK, GSBI_CLK_BRANCH_ENA, GSBI_CLK_BRANCH_ENA_MSK, GSBI_D_VAL_SHFT, GSBI_IDX_TO_GSBI, GSBI_M_VAL_SHFT, GSBI_N_VAL_SHFT, GSBI_PRE_DIV_SEL_SHFT, GSBIn_D_VAL_MSK, GSBIn_HCLK_CTL_REG, GSBIn_M_VAL_MSK, GSBIn_N_VAL_MSK, GSBIn_PLL_SRC_MSK, GSBIn_PLL_SRC_PLL8, GSBIn_PRE_DIV_SEL_MSK, GSBIn_RESET_REG, MNCNTR_DIS, MNCNTR_EN, MNCNTR_MODE_DUAL_EDGE, MNCNTR_MODE_MSK, MNCNTR_MSK, MNCNTR_RST_DIS, MNCNTR_RST_ENA, MNCNTR_RST_MSK, printk, QUP_CLK_BRANCH_DIS, QUP_CLK_BRANCH_ENA, QUP_CLK_BRANCH_ENA_MSK, blsp_spi::qup_md_reg, blsp_spi::qup_ns_reg, ipq_spi_slave::regs, ipq_spi_slave::slave, SUCCESS, and udelay().

Referenced by spi_ctrlr_claim_bus().

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gsbi_pin_config()

static void gsbi_pin_config ( unsigned int  port_num, int  cs_num  )

static

Definition at line 290 of file spi.c.

References clrsetbits32_i, CS_change(), CS_DEASSERT, cs_gpio_array, DRV_STR_IDX, FUNC_SEL_GPIO, FUNC_SEL_IDX, GPIO_DIR_IDX, GPIO_DRV_STR_10MA, GPIO_EN_IDX, GPIO_FUNC_ENABLE, GPIO_OUTPUT, GPIO_PULL_UP, gpio_tlmm_config(), GSBI1_RESET, GSBI1_RESET_MSK, GSBI_IDX_TO_GSBI, gsbi_pin_conf, GSBI_PIN_IDX, GSBIn_RESET_REG, NUM_GSBI_PINS, and PULL_CONF_IDX.

Referenced by spi_ctrlr_claim_bus().

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 587 of file spi.c.

References spi_slave::bus, spi_slave::cs, EIO, gsbi_clock_init(), gsbi_pin_config(), ipq_spi_slave::initialized, slave, ipq_spi_slave::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 610 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 744 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 675 of file spi.c.

References spi_slave::bus, clrsetbits32_i, config_spi_state(), spi_slave::cs, CS_ASSERT, CS_change(), CS_DEASSERT, MAX_PACKET_COUNT, MIN, blsp_spi::qup_config, ipq_spi_slave::regs, slave, ipq_spi_slave::slave, SPI_QUP_CONF_INPUT_ENA, SPI_QUP_CONF_INPUT_MSK, SPI_QUP_CONF_OUTPUT_ENA, SPI_QUP_CONF_OUTPUT_MSK, SPI_RESET_STATE, spi_xfer_rx_packet(), spi_xfer_tx_packet(), to_ipq_spi(), and void().

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spi_hw_init()

static int spi_hw_init ( struct ipq_spi_slave *  ds )

static

Definition at line 513 of file spi.c.

References CLK_ALWAYS_ON, clrsetbits32_i, config_spi_state(), blsp_spi::error_flags_en, ipq_spi_slave::initialized, INPUT_BLOCK_MODE, INPUT_BLOCK_MODE_MSK, blsp_spi::io_control, LOOP_BACK_MSK, ipq_spi_slave::mode, MX_CS_MODE, NO_LOOP_BACK, NO_TRI_STATE, OUTPUT_BIT_SHIFT_EN, OUTPUT_BIT_SHIFT_MSK, OUTPUT_BLOCK_MODE, OUTPUT_BLOCK_MODE_MSK, PROTOCOL_CODE_MSK, PROTOCOL_CODE_SPI, blsp_spi::qup_config, QUP_CONFIG_MINI_CORE_MSK, QUP_CONFIG_MINI_CORE_SPI, blsp_spi::qup_error_flags_en, blsp_spi::qup_io_modes, ipq_spi_slave::regs, SLAVE_OPERATION, SLAVE_OPERATION_MSK, SPI_8_BIT_WORD, SPI_BIT_WORD_MSK, blsp_spi::spi_config, SPI_QUP_CONF_INPUT_MSK, SPI_QUP_CONF_NO_INPUT, SPI_QUP_CONF_NO_OUTPUT, SPI_QUP_CONF_OUTPUT_MSK, spi_reset(), SPI_RESET_STATE, spi_set_mode(), SUCCESS, and writel_i.

Referenced by spi_ctrlr_claim_bus().

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spi_reset()

static void spi_reset ( struct ipq_spi_slave *  ds )

static

Definition at line 418 of file spi.c.

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 212 of file spi.c.

References BIOS_ERR, GSBI_SPI_MODE_0, GSBI_SPI_MODE_1, GSBI_SPI_MODE_2, GSBI_SPI_MODE_3, blsp_spi::io_control, printk, readl_i, ipq_spi_slave::regs, blsp_spi::spi_config, SPI_INPUT_FIRST_MODE, SPI_IO_CONTROL_CLOCK_IDLE_HIGH, val, and writel_i.

Referenced by spi_hw_init().

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spi_xfer_rx_packet()

static int spi_xfer_rx_packet ( struct ipq_spi_slave *  ds, uint8_t *  din, unsigned int  in_bytes  )

static

Definition at line 647 of file spi.c.

References config_spi_state(), blsp_spi::qup_input_fifo, QUP_INPUT_FIFO_NOT_EMPTY, blsp_spi::qup_mx_input_count, blsp_spi::qup_mx_output_count, blsp_spi::qup_operational, blsp_spi::qup_output_fifo, readl_i, ipq_spi_slave::regs, SPI_RESET_STATE, SPI_RUN_STATE, and writel_i.

Referenced by spi_ctrlr_xfer().

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spi_xfer_tx_packet()

static int spi_xfer_tx_packet ( struct ipq_spi_slave *  ds, const uint8_t *  dout, unsigned int  out_bytes  )

static

Definition at line 619 of file spi.c.

References config_spi_state(), blsp_spi::qup_mx_output_count, blsp_spi::qup_operational, blsp_spi::qup_output_fifo, QUP_OUTPUT_FIFO_FULL, QUP_OUTPUT_FIFO_NOT_EMPTY, readl_i, ipq_spi_slave::regs, SPI_RESET_STATE, SPI_RUN_STATE, and writel_i.

Referenced by spi_ctrlr_xfer().

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to_ipq_spi()

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

static

Definition at line 491 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(), and spi_ctrlr_xfer().

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Variable Documentation

cs_gpio_array

unsigned int cs_gpio_array[NUM_PORTS][NUM_CS]

static

Initial value:

= {
        {
                GSBI5_SPI_CS_0, GSBI5_SPI_CS_1, GSBI5_SPI_CS_2, GSBI5_SPI_CS_3
        },
        {
                GSBI6_SPI_CS_0,              0,              0,              0
        },
        {
                GSBI7_SPI_CS_0,              0,              0,              0
        }
}

Definition at line 107 of file spi.c.

Referenced by CS_change(), and gsbi_pin_config().

gsbi_pin_conf

unsigned int gsbi_pin_conf[NUM_PORTS][NUM_GSBI_PINS][TLMM_ARGS]

static

Definition at line 47 of file spi.c.

Referenced by gsbi_pin_config().

hclk_state

unsigned int hclk_state[NUM_PORTS]

static

Initial value:

= {
        GSBI5_HCLK,
        GSBI6_HCLK,
        GSBI7_HCLK
}

Definition at line 125 of file spi.c.

Referenced by check_hclk_state().

qup_apps_clk_state

unsigned int qup_apps_clk_state[NUM_PORTS]

static

Initial value:

= {
        GSBI5_QUP_APPS_CLK,
        GSBI6_QUP_APPS_CLK,
        GSBI7_QUP_APPS_CLK
}

Definition at line 137 of file spi.c.

Referenced by check_qup_clk_state().

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 744 of file spi.c.

spi_ctrlr_bus_map

const struct spi_ctrlr_buses spi_ctrlr_bus_map[]

Initial value:

= {
        {
                .ctrlr = &spi_ctrlr,
                .bus_start = GSBI5_SPI,
                .bus_end = GSBI7_SPI,
        },
}

Definition at line 744 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 805 of file spi.c.

spi_reg

const struct gsbi_spi spi_reg[]

static

Definition at line 418 of file spi.c.

spi_slave_pool

struct ipq_spi_slave spi_slave_pool[2]

static

Definition at line 418 of file spi.c.

Referenced by to_ipq_spi().