linux-imx

/*

 * SPI bus driver for CSR SiRFprimaII

 *

 * Copyright (c) 2011 Cambridge Silicon Radio Limited, a CSR plc group company.

 *

 * Licensed under GPLv2 or later.

 */

​

#include <linux/module.h>

#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/clk.h>

#include <linux/completion.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/of.h>

#include <linux/bitops.h>

#include <linux/err.h>

#include <linux/platform_device.h>

#include <linux/of_gpio.h>

#include <linux/spi/spi.h>

#include <linux/spi/spi_bitbang.h>

#include <linux/dmaengine.h>

#include <linux/dma-direction.h>

#include <linux/dma-mapping.h>

#include <linux/reset.h>

​

#define DRIVER_NAME "sirfsoc_spi"

/* SPI CTRL register defines */

#define SIRFSOC_SPI_SLV_MODE        BIT(16)

#define SIRFSOC_SPI_CMD_MODE        BIT(17)

#define SIRFSOC_SPI_CS_IO_OUT       BIT(18)

#define SIRFSOC_SPI_CS_IO_MODE      BIT(19)

#define SIRFSOC_SPI_CLK_IDLE_STAT   BIT(20)

#define SIRFSOC_SPI_CS_IDLE_STAT    BIT(21)

#define SIRFSOC_SPI_TRAN_MSB        BIT(22)

#define SIRFSOC_SPI_DRV_POS_EDGE    BIT(23)

#define SIRFSOC_SPI_CS_HOLD_TIME    BIT(24)

#define SIRFSOC_SPI_CLK_SAMPLE_MODE BIT(25)

#define SIRFSOC_SPI_TRAN_DAT_FORMAT_8   (0 << 26)

#define SIRFSOC_SPI_TRAN_DAT_FORMAT_12  (1 << 26)

#define SIRFSOC_SPI_TRAN_DAT_FORMAT_16  (2 << 26)

#define SIRFSOC_SPI_TRAN_DAT_FORMAT_32  (3 << 26)

#define SIRFSOC_SPI_CMD_BYTE_NUM(x) ((x & 3) << 28)

#define SIRFSOC_SPI_ENA_AUTO_CLR    BIT(30)

#define SIRFSOC_SPI_MUL_DAT_MODE    BIT(31)

​

/* Interrupt Enable */

#define SIRFSOC_SPI_RX_DONE_INT_EN  BIT(0)

#define SIRFSOC_SPI_TX_DONE_INT_EN  BIT(1)

#define SIRFSOC_SPI_RX_OFLOW_INT_EN BIT(2)

#define SIRFSOC_SPI_TX_UFLOW_INT_EN BIT(3)

#define SIRFSOC_SPI_RX_IO_DMA_INT_EN    BIT(4)

#define SIRFSOC_SPI_TX_IO_DMA_INT_EN    BIT(5)

#define SIRFSOC_SPI_RXFIFO_FULL_INT_EN  BIT(6)

#define SIRFSOC_SPI_TXFIFO_EMPTY_INT_EN BIT(7)

#define SIRFSOC_SPI_RXFIFO_THD_INT_EN   BIT(8)

#define SIRFSOC_SPI_TXFIFO_THD_INT_EN   BIT(9)

#define SIRFSOC_SPI_FRM_END_INT_EN  BIT(10)

​

/* Interrupt status */

#define SIRFSOC_SPI_RX_DONE     BIT(0)

#define SIRFSOC_SPI_TX_DONE     BIT(1)