linux-imx

/*

 * Copyright (C) 2012-2013 Uwe Kleine-Koenig for Pengutronix

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License version 2 as published by the

 * Free Software Foundation.

 */

#include <linux/kernel.h>

#include <linux/io.h>

#include <linux/spi/spi.h>

#include <linux/spi/spi_bitbang.h>

#include <linux/gpio.h>

#include <linux/interrupt.h>

#include <linux/platform_device.h>

#include <linux/clk.h>

#include <linux/err.h>

#include <linux/module.h>

#include <linux/of_gpio.h>

#include <linux/platform_data/efm32-spi.h>

​

#define DRIVER_NAME "efm32-spi"

​

#define MASK_VAL(mask, val)     ((val << __ffs(mask)) & mask)

​

#define REG_CTRL        0x00

#define REG_CTRL_SYNC           0x0001

#define REG_CTRL_CLKPOL         0x0100

#define REG_CTRL_CLKPHA         0x0200

#define REG_CTRL_MSBF           0x0400

#define REG_CTRL_TXBIL          0x1000

​

#define REG_FRAME       0x04

#define REG_FRAME_DATABITS__MASK    0x000f

#define REG_FRAME_DATABITS(n)       ((n) - 3)

​

#define REG_CMD         0x0c

#define REG_CMD_RXEN            0x0001

#define REG_CMD_RXDIS           0x0002

#define REG_CMD_TXEN            0x0004

#define REG_CMD_TXDIS           0x0008

#define REG_CMD_MASTEREN        0x0010

​

#define REG_STATUS      0x10

#define REG_STATUS_TXENS        0x0002

#define REG_STATUS_TXC          0x0020

#define REG_STATUS_TXBL         0x0040

#define REG_STATUS_RXDATAV      0x0080

​

#define REG_CLKDIV      0x14

​

#define REG_RXDATAX     0x18

#define REG_RXDATAX_RXDATA__MASK    0x01ff

#define REG_RXDATAX_PERR        0x4000

#define REG_RXDATAX_FERR        0x8000

​

#define REG_TXDATA      0x34

​

#define REG_IF      0x40

#define REG_IF_TXBL         0x0002

#define REG_IF_RXDATAV          0x0004

​

#define REG_IFS     0x44

#define REG_IFC     0x48