linux-imx

/*

 * Driver for Amlogic Meson SPI flash controller (SPIFC)

 *

 * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program. If not, see <http://www.gnu.org/licenses/>.

 */

​

#include <linux/clk.h>

#include <linux/delay.h>

#include <linux/device.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/pm_runtime.h>

#include <linux/regmap.h>

#include <linux/spi/spi.h>

#include <linux/types.h>

​

/* register map */

#define REG_CMD         0x00

#define REG_ADDR        0x04

#define REG_CTRL        0x08

#define REG_CTRL1       0x0c

#define REG_STATUS      0x10

#define REG_CTRL2       0x14

#define REG_CLOCK       0x18

#define REG_USER        0x1c

#define REG_USER1       0x20

#define REG_USER2       0x24

#define REG_USER3       0x28

#define REG_USER4       0x2c

#define REG_SLAVE       0x30

#define REG_SLAVE1      0x34

#define REG_SLAVE2      0x38

#define REG_SLAVE3      0x3c

#define REG_C0          0x40

#define REG_B8          0x60

#define REG_MAX         0x7c

​

/* register fields */

#define CMD_USER        BIT(18)

#define CTRL_ENABLE_AHB     BIT(17)

#define CLOCK_SOURCE        BIT(31)

#define CLOCK_DIV_SHIFT     12

#define CLOCK_DIV_MASK      (0x3f << CLOCK_DIV_SHIFT)

#define CLOCK_CNT_HIGH_SHIFT    6

#define CLOCK_CNT_HIGH_MASK (0x3f << CLOCK_CNT_HIGH_SHIFT)

#define CLOCK_CNT_LOW_SHIFT 0

#define CLOCK_CNT_LOW_MASK  (0x3f << CLOCK_CNT_LOW_SHIFT)

#define USER_DIN_EN_MS      BIT(0)

#define USER_CMP_MODE       BIT(2)

#define USER_UC_DOUT_SEL    BIT(27)

#define USER_UC_DIN_SEL     BIT(28)

#define USER_UC_MASK        ((BIT(5) - 1) << 27)

#define USER1_BN_UC_DOUT_SHIFT  17