linux-imx

/*

 * Marvell Armada-3700 SPI controller driver

 *

 * Copyright (C) 2016 Marvell Ltd.

 *

 * Author: Wilson Ding <dingwei@marvell.com>

 * Author: Romain Perier <romain.perier@free-electrons.com>

 *

 * 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/clk.h>

#include <linux/completion.h>

#include <linux/delay.h>

#include <linux/err.h>

#include <linux/interrupt.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_irq.h>

#include <linux/of_device.h>

#include <linux/pinctrl/consumer.h>

#include <linux/spi/spi.h>

​

#define DRIVER_NAME         "armada_3700_spi"

​

#define A3700_SPI_MAX_SPEED_HZ      100000000

#define A3700_SPI_MAX_PRESCALE      30

#define A3700_SPI_TIMEOUT       10

​

/* SPI Register Offest */

#define A3700_SPI_IF_CTRL_REG       0x00

#define A3700_SPI_IF_CFG_REG        0x04

#define A3700_SPI_DATA_OUT_REG      0x08

#define A3700_SPI_DATA_IN_REG       0x0C

#define A3700_SPI_IF_INST_REG       0x10

#define A3700_SPI_IF_ADDR_REG       0x14

#define A3700_SPI_IF_RMODE_REG      0x18

#define A3700_SPI_IF_HDR_CNT_REG    0x1C

#define A3700_SPI_IF_DIN_CNT_REG    0x20

#define A3700_SPI_IF_TIME_REG       0x24

#define A3700_SPI_INT_STAT_REG      0x28

#define A3700_SPI_INT_MASK_REG      0x2C

​

/* A3700_SPI_IF_CTRL_REG */

#define A3700_SPI_EN            BIT(16)

#define A3700_SPI_ADDR_NOT_CONFIG   BIT(12)

#define A3700_SPI_WFIFO_OVERFLOW    BIT(11)

#define A3700_SPI_WFIFO_UNDERFLOW   BIT(10)

#define A3700_SPI_RFIFO_OVERFLOW    BIT(9)

#define A3700_SPI_RFIFO_UNDERFLOW   BIT(8)

#define A3700_SPI_WFIFO_FULL        BIT(7)

#define A3700_SPI_WFIFO_EMPTY       BIT(6)

#define A3700_SPI_RFIFO_FULL        BIT(5)

#define A3700_SPI_RFIFO_EMPTY       BIT(4)

#define A3700_SPI_WFIFO_RDY     BIT(3)

#define A3700_SPI_RFIFO_RDY     BIT(2)

#define A3700_SPI_XFER_RDY      BIT(1)

#define A3700_SPI_XFER_DONE     BIT(0)

​