spi.c File Reference

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

Include dependency graph for spi.c:

Go to the source code of this file.

Macros
#define	DEBUG_SPI(x, ...)
#define	SPI_PACKET_SIZE_BYTES   1
#define	SPI_MAX_TRANSFER_BYTES_FIFO   (64 * SPI_PACKET_SIZE_BYTES)
#define	SPI_MAX_TRANSFER_BYTES_DMA   (65535 * SPI_PACKET_SIZE_BYTES)
#define	SPI_FIFO_XFER_TIMEOUT_US   1000
#define	SPI_CMD1_GO   (1 << 31)
#define	SPI_CMD1_M_S   (1 << 30)
#define	SPI_CMD1_MODE_MASK   0x3
#define	SPI_CMD1_MODE_SHIFT   28
#define	SPI_CMD1_CS_SEL_MASK   0x3
#define	SPI_CMD1_CS_SEL_SHIFT   26
#define	SPI_CMD1_CS_POL_INACTIVE3   (1 << 25)
#define	SPI_CMD1_CS_POL_INACTIVE2   (1 << 24)
#define	SPI_CMD1_CS_POL_INACTIVE1   (1 << 23)
#define	SPI_CMD1_CS_POL_INACTIVE0   (1 << 22)
#define	SPI_CMD1_CS_SW_HW   (1 << 21)
#define	SPI_CMD1_CS_SW_VAL   (1 << 20)
#define	SPI_CMD1_IDLE_SDA_MASK   0x3
#define	SPI_CMD1_IDLE_SDA_SHIFT   18
#define	SPI_CMD1_BIDIR   (1 << 17)
#define	SPI_CMD1_LSBI_FE   (1 << 16)
#define	SPI_CMD1_LSBY_FE   (1 << 15)
#define	SPI_CMD1_BOTH_EN_BIT   (1 << 14)
#define	SPI_CMD1_BOTH_EN_BYTE   (1 << 13)
#define	SPI_CMD1_RX_EN   (1 << 12)
#define	SPI_CMD1_TX_EN   (1 << 11)
#define	SPI_CMD1_PACKED   (1 << 5)
#define	SPI_CMD1_BIT_LEN_MASK   0x1f
#define	SPI_CMD1_BIT_LEN_SHIFT   0
#define	SPI_CMD2_TX_CLK_TAP_DELAY   (1 << 6)
#define	SPI_CMD2_TX_CLK_TAP_DELAY_MASK   (0x3F << 6)
#define	SPI_CMD2_RX_CLK_TAP_DELAY   (1 << 0)
#define	SPI_CMD2_RX_CLK_TAP_DELAY_MASK   (0x3F << 0)
#define	SPI_STATUS_RDY   (1 << 30)
#define	SPI_STATUS_SLV_IDLE_COUNT_MASK   0xff
#define	SPI_STATUS_SLV_IDLE_COUNT_SHIFT   16
#define	SPI_STATUS_BLOCK_COUNT   0xffff
#define	SPI_STATUS_BLOCK_COUNT_SHIFT   0
#define	SPI_FIFO_STATUS_CS_INACTIVE   (1 << 31)
#define	SPI_FIFO_STATUS_FRAME_END   (1 << 30)
#define	SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_MASK   0x7f
#define	SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_SHIFT   23
#define	SPI_FIFO_STATUS_TX_FIFO_EMPTY_COUNT_MASK   0x7f
#define	SPI_FIFO_STATUS_TX_FIFO_EMPTY_COUNT_SHIFT   16
#define	SPI_FIFO_STATUS_RX_FIFO_FLUSH   (1 << 15)
#define	SPI_FIFO_STATUS_TX_FIFO_FLUSH   (1 << 14)
#define	SPI_FIFO_STATUS_ERR   (1 << 8)
#define	SPI_FIFO_STATUS_TX_FIFO_OVF   (1 << 7)
#define	SPI_FIFO_STATUS_TX_FIFO_UNR   (1 << 6)
#define	SPI_FIFO_STATUS_RX_FIFO_OVF   (1 << 5)
#define	SPI_FIFO_STATUS_RX_FIFO_UNR   (1 << 4)
#define	SPI_FIFO_STATUS_TX_FIFO_FULL   (1 << 3)
#define	SPI_FIFO_STATUS_TX_FIFO_EMPTY   (1 << 2)
#define	SPI_FIFO_STATUS_RX_FIFO_FULL   (1 << 1)
#define	SPI_FIFO_STATUS_RX_FIFO_EMPTY   (1 << 0)
#define	SPI_DMA_CTL_DMA   (1 << 31)
#define	SPI_DMA_CTL_CONT   (1 << 30)
#define	SPI_DMA_CTL_IE_RX   (1 << 29)
#define	SPI_DMA_CTL_IE_TX   (1 << 28)
#define	SPI_DMA_CTL_RX_TRIG_MASK   0x3
#define	SPI_DMA_CTL_RX_TRIG_SHIFT   19
#define	SPI_DMA_CTL_TX_TRIG_MASK   0x3
#define	SPI_DMA_CTL_TX_TRIG_SHIFT   15
#define	SPI_DMA_CTL_BLOCK_SIZE_MASK   0xffff
#define	SPI_DMA_CTL_BLOCK_SIZE_SHIFT   0
#define	MIN_DELAY_US   250

Enumerations
enum	spi_direction { SPI_SEND , SPI_RECEIVE , SPI_SEND , SPI_RECEIVE }

Functions
struct tegra_spi_channel *	tegra_spi_init (unsigned int bus)
static struct tegra_spi_channel *const	to_tegra_spi (int bus)
static unsigned int	tegra_spi_speed (unsigned int bus)
static int	spi_ctrlr_claim_bus (const struct spi_slave *slave)
static void	spi_ctrlr_release_bus (const struct spi_slave *slave)
static void	dump_fifo_status (struct tegra_spi_channel *spi)
static void	clear_fifo_status (struct tegra_spi_channel *spi)
static void	dump_spi_regs (struct tegra_spi_channel *spi)
static void	dump_dma_regs (struct apb_dma_channel *dma)
static unsigned int	spi_byte_count (struct tegra_spi_channel *spi)
static void	spi_delay (struct tegra_spi_channel *spi, unsigned int bytes_remaining)
static void	tegra_spi_wait (struct tegra_spi_channel *spi)
static int	fifo_error (struct tegra_spi_channel *spi)
static int	tegra_spi_pio_prepare (struct tegra_spi_channel *spi, unsigned int bytes, enum spi_direction dir)
static void	tegra_spi_pio_start (struct tegra_spi_channel *spi)
static u32	rx_fifo_count (struct tegra_spi_channel *spi)
static int	tegra_spi_pio_finish (struct tegra_spi_channel *spi)
static void	setup_dma_params (struct tegra_spi_channel *spi, struct apb_dma_channel *dma)
static int	tegra_spi_dma_prepare (struct tegra_spi_channel *spi, unsigned int bytes, enum spi_direction dir)
static void	tegra_spi_dma_start (struct tegra_spi_channel *spi)
static int	tegra_spi_dma_finish (struct tegra_spi_channel *spi)
static int	xfer_setup (struct tegra_spi_channel *spi, void *buf, unsigned int bytes, enum spi_direction dir)
static void	xfer_start (struct tegra_spi_channel *spi)
static void	xfer_wait (struct tegra_spi_channel *spi)
static int	xfer_finish (struct tegra_spi_channel *spi)
static int	spi_ctrlr_xfer (const struct spi_slave *slave, const void *dout, size_t out_bytes, void *din, size_t in_bytes)

Variables
static struct tegra_spi_channel	tegra_spi_channels []
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

DEBUG_SPI

#define DEBUG_SPI	(		x,
			...
	)

Definition at line 20 of file spi.c.

MIN_DELAY_US

#define MIN_DELAY_US   250

Definition at line 312 of file spi.c.

SPI_CMD1_BIDIR

#define SPI_CMD1_BIDIR   (1 << 17)

Definition at line 53 of file spi.c.

SPI_CMD1_BIT_LEN_MASK

#define SPI_CMD1_BIT_LEN_MASK   0x1f

Definition at line 61 of file spi.c.

SPI_CMD1_BIT_LEN_SHIFT

#define SPI_CMD1_BIT_LEN_SHIFT   0

Definition at line 62 of file spi.c.

SPI_CMD1_BOTH_EN_BIT

#define SPI_CMD1_BOTH_EN_BIT   (1 << 14)

Definition at line 56 of file spi.c.

SPI_CMD1_BOTH_EN_BYTE

#define SPI_CMD1_BOTH_EN_BYTE   (1 << 13)

Definition at line 57 of file spi.c.

SPI_CMD1_CS_POL_INACTIVE0

#define SPI_CMD1_CS_POL_INACTIVE0   (1 << 22)

Definition at line 48 of file spi.c.

SPI_CMD1_CS_POL_INACTIVE1

#define SPI_CMD1_CS_POL_INACTIVE1   (1 << 23)

Definition at line 47 of file spi.c.

SPI_CMD1_CS_POL_INACTIVE2

#define SPI_CMD1_CS_POL_INACTIVE2   (1 << 24)

Definition at line 46 of file spi.c.

SPI_CMD1_CS_POL_INACTIVE3

#define SPI_CMD1_CS_POL_INACTIVE3   (1 << 25)

Definition at line 45 of file spi.c.

SPI_CMD1_CS_SEL_MASK

#define SPI_CMD1_CS_SEL_MASK   0x3

Definition at line 43 of file spi.c.

SPI_CMD1_CS_SEL_SHIFT

#define SPI_CMD1_CS_SEL_SHIFT   26

Definition at line 44 of file spi.c.

SPI_CMD1_CS_SW_HW

#define SPI_CMD1_CS_SW_HW   (1 << 21)

Definition at line 49 of file spi.c.

SPI_CMD1_CS_SW_VAL

#define SPI_CMD1_CS_SW_VAL   (1 << 20)

Definition at line 50 of file spi.c.

SPI_CMD1_GO

#define SPI_CMD1_GO   (1 << 31)

Definition at line 39 of file spi.c.

SPI_CMD1_IDLE_SDA_MASK

#define SPI_CMD1_IDLE_SDA_MASK   0x3

Definition at line 51 of file spi.c.

SPI_CMD1_IDLE_SDA_SHIFT

#define SPI_CMD1_IDLE_SDA_SHIFT   18

Definition at line 52 of file spi.c.

SPI_CMD1_LSBI_FE

#define SPI_CMD1_LSBI_FE   (1 << 16)

Definition at line 54 of file spi.c.

SPI_CMD1_LSBY_FE

#define SPI_CMD1_LSBY_FE   (1 << 15)

Definition at line 55 of file spi.c.

SPI_CMD1_M_S

#define SPI_CMD1_M_S   (1 << 30)

Definition at line 40 of file spi.c.

SPI_CMD1_MODE_MASK

#define SPI_CMD1_MODE_MASK   0x3

Definition at line 41 of file spi.c.

SPI_CMD1_MODE_SHIFT

#define SPI_CMD1_MODE_SHIFT   28

Definition at line 42 of file spi.c.

SPI_CMD1_PACKED

#define SPI_CMD1_PACKED   (1 << 5)

Definition at line 60 of file spi.c.

SPI_CMD1_RX_EN

#define SPI_CMD1_RX_EN   (1 << 12)

Definition at line 58 of file spi.c.

SPI_CMD1_TX_EN

#define SPI_CMD1_TX_EN   (1 << 11)

Definition at line 59 of file spi.c.

SPI_CMD2_RX_CLK_TAP_DELAY

#define SPI_CMD2_RX_CLK_TAP_DELAY   (1 << 0)

Definition at line 67 of file spi.c.

SPI_CMD2_RX_CLK_TAP_DELAY_MASK

#define SPI_CMD2_RX_CLK_TAP_DELAY_MASK   (0x3F << 0)

Definition at line 68 of file spi.c.

SPI_CMD2_TX_CLK_TAP_DELAY

#define SPI_CMD2_TX_CLK_TAP_DELAY   (1 << 6)

Definition at line 65 of file spi.c.

SPI_CMD2_TX_CLK_TAP_DELAY_MASK

#define SPI_CMD2_TX_CLK_TAP_DELAY_MASK   (0x3F << 6)

Definition at line 66 of file spi.c.

SPI_DMA_CTL_BLOCK_SIZE_MASK

#define SPI_DMA_CTL_BLOCK_SIZE_MASK   0xffff

Definition at line 107 of file spi.c.

SPI_DMA_CTL_BLOCK_SIZE_SHIFT

#define SPI_DMA_CTL_BLOCK_SIZE_SHIFT   0

Definition at line 108 of file spi.c.

SPI_DMA_CTL_CONT

#define SPI_DMA_CTL_CONT   (1 << 30)

Definition at line 98 of file spi.c.

SPI_DMA_CTL_DMA

#define SPI_DMA_CTL_DMA   (1 << 31)

Definition at line 97 of file spi.c.

SPI_DMA_CTL_IE_RX

#define SPI_DMA_CTL_IE_RX   (1 << 29)

Definition at line 99 of file spi.c.

SPI_DMA_CTL_IE_TX

#define SPI_DMA_CTL_IE_TX   (1 << 28)

Definition at line 100 of file spi.c.

SPI_DMA_CTL_RX_TRIG_MASK

#define SPI_DMA_CTL_RX_TRIG_MASK   0x3

Definition at line 101 of file spi.c.

SPI_DMA_CTL_RX_TRIG_SHIFT

#define SPI_DMA_CTL_RX_TRIG_SHIFT   19

Definition at line 102 of file spi.c.

SPI_DMA_CTL_TX_TRIG_MASK

#define SPI_DMA_CTL_TX_TRIG_MASK   0x3

Definition at line 103 of file spi.c.

SPI_DMA_CTL_TX_TRIG_SHIFT

#define SPI_DMA_CTL_TX_TRIG_SHIFT   15

Definition at line 104 of file spi.c.

SPI_FIFO_STATUS_CS_INACTIVE

#define SPI_FIFO_STATUS_CS_INACTIVE   (1 << 31)

Definition at line 78 of file spi.c.

SPI_FIFO_STATUS_ERR

#define SPI_FIFO_STATUS_ERR   (1 << 8)

Definition at line 86 of file spi.c.

SPI_FIFO_STATUS_FRAME_END

#define SPI_FIFO_STATUS_FRAME_END   (1 << 30)

Definition at line 79 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_EMPTY

#define SPI_FIFO_STATUS_RX_FIFO_EMPTY   (1 << 0)

Definition at line 94 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_FLUSH

#define SPI_FIFO_STATUS_RX_FIFO_FLUSH   (1 << 15)

Definition at line 84 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_FULL

#define SPI_FIFO_STATUS_RX_FIFO_FULL   (1 << 1)

Definition at line 93 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_MASK

#define SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_MASK   0x7f

Definition at line 80 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_SHIFT

#define SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_SHIFT   23

Definition at line 81 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_OVF

#define SPI_FIFO_STATUS_RX_FIFO_OVF   (1 << 5)

Definition at line 89 of file spi.c.

SPI_FIFO_STATUS_RX_FIFO_UNR

#define SPI_FIFO_STATUS_RX_FIFO_UNR   (1 << 4)

Definition at line 90 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_EMPTY

#define SPI_FIFO_STATUS_TX_FIFO_EMPTY   (1 << 2)

Definition at line 92 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_EMPTY_COUNT_MASK

#define SPI_FIFO_STATUS_TX_FIFO_EMPTY_COUNT_MASK   0x7f

Definition at line 82 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_EMPTY_COUNT_SHIFT

#define SPI_FIFO_STATUS_TX_FIFO_EMPTY_COUNT_SHIFT   16

Definition at line 83 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_FLUSH

#define SPI_FIFO_STATUS_TX_FIFO_FLUSH   (1 << 14)

Definition at line 85 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_FULL

#define SPI_FIFO_STATUS_TX_FIFO_FULL   (1 << 3)

Definition at line 91 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_OVF

#define SPI_FIFO_STATUS_TX_FIFO_OVF   (1 << 7)

Definition at line 87 of file spi.c.

SPI_FIFO_STATUS_TX_FIFO_UNR

#define SPI_FIFO_STATUS_TX_FIFO_UNR   (1 << 6)

Definition at line 88 of file spi.c.

SPI_FIFO_XFER_TIMEOUT_US

#define SPI_FIFO_XFER_TIMEOUT_US   1000

Definition at line 36 of file spi.c.

SPI_MAX_TRANSFER_BYTES_DMA

#define SPI_MAX_TRANSFER_BYTES_DMA   (65535 * SPI_PACKET_SIZE_BYTES)

Definition at line 29 of file spi.c.

SPI_MAX_TRANSFER_BYTES_FIFO

#define SPI_MAX_TRANSFER_BYTES_FIFO   (64 * SPI_PACKET_SIZE_BYTES)

Definition at line 28 of file spi.c.

SPI_PACKET_SIZE_BYTES

#define SPI_PACKET_SIZE_BYTES   1

Definition at line 27 of file spi.c.

SPI_STATUS_BLOCK_COUNT

#define SPI_STATUS_BLOCK_COUNT   0xffff

Definition at line 74 of file spi.c.

SPI_STATUS_BLOCK_COUNT_SHIFT

#define SPI_STATUS_BLOCK_COUNT_SHIFT   0

Definition at line 75 of file spi.c.

SPI_STATUS_RDY

#define SPI_STATUS_RDY   (1 << 30)

Definition at line 71 of file spi.c.

SPI_STATUS_SLV_IDLE_COUNT_MASK

#define SPI_STATUS_SLV_IDLE_COUNT_MASK   0xff

Definition at line 72 of file spi.c.

SPI_STATUS_SLV_IDLE_COUNT_SHIFT

#define SPI_STATUS_SLV_IDLE_COUNT_SHIFT   16

Definition at line 73 of file spi.c.

Enumeration Type Documentation

spi_direction

enum spi_direction

Enumerator
SPI_SEND
SPI_RECEIVE
SPI_SEND
SPI_RECEIVE

Definition at line 151 of file spi.c.

Function Documentation

clear_fifo_status()

static void clear_fifo_status ( struct tegra_spi_channel *  spi )

static

Definition at line 250 of file spi.c.

References clrbits32, tegra_spi_regs::fifo_status, tegra_spi_channel::regs, SPI_FIFO_STATUS_ERR, SPI_FIFO_STATUS_RX_FIFO_OVF, SPI_FIFO_STATUS_RX_FIFO_UNR, SPI_FIFO_STATUS_TX_FIFO_OVF, and SPI_FIFO_STATUS_TX_FIFO_UNR.

dump_dma_regs()

static void dump_dma_regs ( struct apb_dma_channel *  dma )

static

Definition at line 273 of file spi.c.

References BIOS_INFO, dma, NULL, printk, and read32().

Referenced by tegra_spi_dma_finish().

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dump_fifo_status()

static void dump_fifo_status ( struct tegra_spi_channel *  spi )

static

Definition at line 230 of file spi.c.

References BIOS_INFO, tegra_spi_regs::fifo_status, printk, read32(), tegra_spi_channel::regs, tegra_spi_regs::rx_data, tegra_spi_regs::rx_fifo, SPI_FIFO_STATUS_RX_FIFO_OVF, SPI_FIFO_STATUS_RX_FIFO_UNR, SPI_FIFO_STATUS_TX_FIFO_OVF, SPI_FIFO_STATUS_TX_FIFO_UNR, tegra_spi_regs::tx_data, and tegra_spi_regs::tx_fifo.

Referenced by tegra_spi_dma_finish(), and tegra_spi_pio_finish().

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dump_spi_regs()

static void dump_spi_regs ( struct tegra_spi_channel *  spi )

static

Definition at line 260 of file spi.c.

References BIOS_INFO, tegra_spi_regs::command1, tegra_spi_regs::dma_blk, tegra_spi_regs::dma_ctl, printk, read32(), tegra_spi_channel::regs, and tegra_spi_regs::trans_status.

Referenced by tegra_spi_dma_finish(), and tegra_spi_pio_finish().

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fifo_error()

static int fifo_error ( struct tegra_spi_channel *  spi )

static

Definition at line 338 of file spi.c.

References tegra_spi_regs::fifo_status, read32(), tegra_spi_channel::regs, and SPI_FIFO_STATUS_ERR.

Referenced by tegra_spi_dma_finish(), and tegra_spi_pio_finish().

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rx_fifo_count()

static u32 rx_fifo_count ( struct tegra_spi_channel *  spi )

inlinestatic

Definition at line 388 of file spi.c.

References tegra_spi_regs::fifo_status, read32(), tegra_spi_channel::regs, SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_MASK, and SPI_FIFO_STATUS_RX_FIFO_FULL_COUNT_SHIFT.

Referenced by tegra_spi_pio_finish().

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setup_dma_params()

static void setup_dma_params ( struct tegra_spi_channel *  spi, struct apb_dma_channel *  dma  )

static

Definition at line 428 of file spi.c.

References AHB_BURST_MASK, AHB_BURST_SHIFT, APB_BUS_WIDTH_MASK, APB_BUS_WIDTH_SHIFT, APB_CSR_FLOW, APB_CSR_ONCE, APB_CSR_REQ_SEL_MASK, APB_CSR_REQ_SEL_SHIFT, clrbits32, clrsetbits32, dma, tegra_spi_channel::req_sel, and setbits32.

Referenced by tegra_spi_dma_prepare().

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spi_byte_count()

static unsigned int spi_byte_count ( struct tegra_spi_channel *  spi )

inlinestatic

Definition at line 299 of file spi.c.

References read32(), tegra_spi_channel::regs, SPI_STATUS_BLOCK_COUNT, SPI_STATUS_BLOCK_COUNT_SHIFT, and tegra_spi_regs::trans_status.

Referenced by tegra_spi_dma_finish(), tegra_spi_pio_finish(), and tegra_spi_wait().

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spi_ctrlr_claim_bus()

static int spi_ctrlr_claim_bus ( const struct spi_slave *  slave )

static

Definition at line 192 of file spi.c.

References spi_slave::bus, spi_slave::cs, read32(), tegra_spi_channel::regs, slave, SPI_CMD1_CS_POL_INACTIVE0, SPI_CMD1_CS_SEL_MASK, SPI_CMD1_CS_SEL_SHIFT, SPI_CMD1_CS_SW_VAL, tegra_spi_init(), to_tegra_spi(), val, and write32().

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spi_ctrlr_release_bus()

static void spi_ctrlr_release_bus ( const struct spi_slave *  slave )

static

Definition at line 215 of file spi.c.

References spi_slave::bus, spi_slave::cs, read32(), tegra_spi_channel::regs, slave, SPI_CMD1_CS_POL_INACTIVE0, SPI_CMD1_CS_SW_VAL, to_tegra_spi(), val, and write32().

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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 700 of file spi.c.

spi_delay()

static void spi_delay ( struct tegra_spi_channel *  spi, unsigned int  bytes_remaining  )

static

Definition at line 313 of file spi.c.

References spi_slave::bus, MIN_DELAY_US, tegra_spi_channel::slave, tegra_spi_speed(), and udelay().

Referenced by tegra_spi_dma_finish(), and tegra_spi_wait().

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tegra_spi_dma_finish()

static int tegra_spi_dma_finish ( struct tegra_spi_channel *  spi )

static

Definition at line 527 of file spi.c.

References BIOS_ERR, clrbits32, tegra_spi_regs::command1, dma_busy(), apb_dma_channel_regs::dma_byte_sta, tegra_spi_channel::dma_in, tegra_spi_channel::dma_out, dma_release(), dma_stop(), dump_dma_regs(), dump_fifo_status(), dump_spi_regs(), fifo_error(), NULL, printk, read32(), apb_dma_channel::regs, tegra_spi_channel::regs, spi_byte_count(), SPI_CMD1_RX_EN, SPI_CMD1_TX_EN, spi_delay(), and apb_dma_channel_regs::wcount.

Referenced by xfer_finish().

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tegra_spi_dma_prepare()

static int tegra_spi_dma_prepare ( struct tegra_spi_channel *  spi, unsigned int  bytes, enum spi_direction  dir  )

static

Definition at line 448 of file spi.c.

References apb_dma_channel_regs::ahb_ptr, ALIGN_DOWN, APB_CSR_DIR, apb_dma_channel_regs::apb_ptr, clrbits32, apb_dma_channel_regs::csr, dcache_clean_by_mva(), dcache_clean_invalidate_by_mva, tegra_spi_regs::dma_blk, dma_claim(), tegra_spi_channel::dma_in, tegra_spi_channel::dma_out, tegra_spi_channel::in_buf, MIN, tegra_spi_channel::out_buf, apb_dma_channel::regs, tegra_spi_channel::regs, tegra_spi_regs::rx_fifo, setbits32, setup_dma_params(), SPI_MAX_TRANSFER_BYTES_DMA, SPI_SEND, TEGRA_DMA_ALIGN_BYTES, tegra_spi_regs::tx_fifo, apb_dma_channel_regs::wcount, and write32().

Referenced by xfer_setup().

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tegra_spi_dma_start()

static void tegra_spi_dma_start ( struct tegra_spi_channel *  spi )

static

Definition at line 502 of file spi.c.

References tegra_spi_regs::command1, tegra_spi_regs::dma_ctl, tegra_spi_channel::dma_in, tegra_spi_channel::dma_out, dma_start(), tegra_spi_channel::regs, setbits32, SPI_CMD1_RX_EN, SPI_CMD1_TX_EN, SPI_DMA_CTL_DMA, SPI_STATUS_RDY, and tegra_spi_regs::trans_status.

Referenced by xfer_start().

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tegra_spi_init()

struct tegra_spi_channel* tegra_spi_init

(

unsigned int

bus

)

Definition at line 156 of file spi.c.

Referenced by spi_ctrlr_claim_bus().

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tegra_spi_pio_finish()

static int tegra_spi_pio_finish ( struct tegra_spi_channel *  spi )

static

Definition at line 395 of file spi.c.

References BIOS_ERR, clrbits32, tegra_spi_regs::command1, dump_fifo_status(), dump_spi_regs(), fifo_error(), tegra_spi_regs::fifo_status, tegra_spi_channel::in_buf, printk, read32(), read8(), tegra_spi_channel::regs, tegra_spi_regs::rx_fifo, rx_fifo_count(), spi_byte_count(), SPI_CMD1_RX_EN, SPI_CMD1_TX_EN, SPI_FIFO_STATUS_RX_FIFO_EMPTY, SPI_FIFO_XFER_TIMEOUT_US, stopwatch_expired(), and stopwatch_init_usecs_expire().

Referenced by xfer_finish().

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tegra_spi_pio_prepare()

static int tegra_spi_pio_prepare ( struct tegra_spi_channel *  spi, unsigned int  bytes, enum spi_direction  dir  )

static

Definition at line 343 of file spi.c.

References tegra_spi_regs::command1, tegra_spi_regs::dma_blk, tegra_spi_regs::fifo_status, MIN, tegra_spi_channel::out_buf, read32(), tegra_spi_channel::regs, setbits32, SPI_CMD1_RX_EN, SPI_CMD1_TX_EN, SPI_FIFO_STATUS_RX_FIFO_FLUSH, SPI_FIFO_STATUS_TX_FIFO_FLUSH, SPI_MAX_TRANSFER_BYTES_FIFO, SPI_SEND, tegra_spi_regs::tx_fifo, and write32().

Referenced by xfer_setup().

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tegra_spi_pio_start()

static void tegra_spi_pio_start ( struct tegra_spi_channel *  spi )

static

Definition at line 380 of file spi.c.

References tegra_spi_regs::command1, read32(), tegra_spi_channel::regs, setbits32, SPI_CMD1_GO, SPI_STATUS_RDY, and tegra_spi_regs::trans_status.

Referenced by xfer_start().

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tegra_spi_speed()

static unsigned int tegra_spi_speed ( unsigned int  bus )

static

Definition at line 186 of file spi.c.

Referenced by spi_delay().

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tegra_spi_wait()

static void tegra_spi_wait ( struct tegra_spi_channel *  spi )

static

Definition at line 327 of file spi.c.

References count, tegra_spi_regs::dma_blk, read32(), tegra_spi_channel::regs, spi_byte_count(), spi_delay(), SPI_DMA_CTL_BLOCK_SIZE_MASK, and SPI_DMA_CTL_BLOCK_SIZE_SHIFT.

Referenced by xfer_wait().

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to_tegra_spi()

static struct tegra_spi_channel* const to_tegra_spi ( int  bus )

static

Definition at line 182 of file spi.c.

References tegra_spi_channels.

Referenced by spi_ctrlr_claim_bus(), and spi_ctrlr_release_bus().

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xfer_finish()

static int xfer_finish ( struct tegra_spi_channel *  spi )

static

Definition at line 687 of file spi.c.

References tegra_spi_dma_finish(), tegra_spi_pio_finish(), tegra_spi_channel::xfer_mode, XFER_MODE_DMA, and XFER_MODE_NONE.

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xfer_setup()

static int xfer_setup ( struct tegra_spi_channel *  spi, void *  buf, unsigned int  bytes, enum spi_direction  dir  )

static

Definition at line 588 of file spi.c.

References buf, dcache_line_bytes(), tegra_spi_channel::in_buf, tegra_spi_channel::out_buf, SPI_RECEIVE, SPI_SEND, tegra_spi_dma_prepare(), tegra_spi_pio_prepare(), tegra_spi_channel::xfer_mode, XFER_MODE_DMA, XFER_MODE_NONE, and XFER_MODE_PIO.

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xfer_start()

static void xfer_start ( struct tegra_spi_channel *  spi )

static

Definition at line 674 of file spi.c.

References tegra_spi_dma_start(), tegra_spi_pio_start(), tegra_spi_channel::xfer_mode, and XFER_MODE_DMA.

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xfer_wait()

static void xfer_wait ( struct tegra_spi_channel *  spi )

static

Definition at line 682 of file spi.c.

References tegra_spi_wait().

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Variable Documentation

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 = SPI_CTRLR_DEFAULT_MAX_XFER_SIZE,
}

Definition at line 700 of file spi.c.

spi_ctrlr_bus_map

const struct spi_ctrlr_buses spi_ctrlr_bus_map[]

Initial value:

= {
        {
                .ctrlr = &spi_ctrlr,
                .bus_start = 1,
                .bus_end = ARRAY_SIZE(tegra_spi_channels)
        },
}

Definition at line 700 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 794 of file spi.c.

tegra_spi_channels

struct tegra_spi_channel tegra_spi_channels[]

static

Definition at line 1 of file spi.c.

Referenced by tegra_spi_init(), and to_tegra_spi().