linux-imx

/*

 * TI AEMIF driver

 *

 * Copyright (C) 2010 - 2013 Texas Instruments Incorporated. http://www.ti.com/

 *

 * Authors:

 * Murali Karicheri <m-karicheri2@ti.com>

 * Ivan Khoronzhuk <ivan.khoronzhuk@ti.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/err.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/platform_device.h>

#include <linux/platform_data/ti-aemif.h>

​

#define TA_SHIFT    2

#define RHOLD_SHIFT 4

#define RSTROBE_SHIFT   7

#define RSETUP_SHIFT    13

#define WHOLD_SHIFT 17

#define WSTROBE_SHIFT   20

#define WSETUP_SHIFT    26

#define EW_SHIFT    30

#define SS_SHIFT    31

​

#define TA(x)       ((x) << TA_SHIFT)

#define RHOLD(x)    ((x) << RHOLD_SHIFT)

#define RSTROBE(x)  ((x) << RSTROBE_SHIFT)

#define RSETUP(x)   ((x) << RSETUP_SHIFT)

#define WHOLD(x)    ((x) << WHOLD_SHIFT)

#define WSTROBE(x)  ((x) << WSTROBE_SHIFT)

#define WSETUP(x)   ((x) << WSETUP_SHIFT)

#define EW(x)       ((x) << EW_SHIFT)

#define SS(x)       ((x) << SS_SHIFT)

​

#define ASIZE_MAX   0x1

#define TA_MAX      0x3

#define RHOLD_MAX   0x7

#define RSTROBE_MAX 0x3f

#define RSETUP_MAX  0xf

#define WHOLD_MAX   0x7

#define WSTROBE_MAX 0x3f

#define WSETUP_MAX  0xf

#define EW_MAX      0x1

#define SS_MAX      0x1

#define NUM_CS      4

​

#define TA_VAL(x)   (((x) & TA(TA_MAX)) >> TA_SHIFT)

#define RHOLD_VAL(x)    (((x) & RHOLD(RHOLD_MAX)) >> RHOLD_SHIFT)

#define RSTROBE_VAL(x)  (((x) & RSTROBE(RSTROBE_MAX)) >> RSTROBE_SHIFT)

#define RSETUP_VAL(x)   (((x) & RSETUP(RSETUP_MAX)) >> RSETUP_SHIFT)

#define WHOLD_VAL(x)    (((x) & WHOLD(WHOLD_MAX)) >> WHOLD_SHIFT)

#define WSTROBE_VAL(x)  (((x) & WSTROBE(WSTROBE_MAX)) >> WSTROBE_SHIFT)

#define WSETUP_VAL(x)   (((x) & WSETUP(WSETUP_MAX)) >> WSETUP_SHIFT)

#define EW_VAL(x)   (((x) & EW(EW_MAX)) >> EW_SHIFT)

#define SS_VAL(x)   (((x) & SS(SS_MAX)) >> SS_SHIFT)

​

#define NRCSR_OFFSET    0x00

#define AWCCR_OFFSET    0x04

#define A1CR_OFFSET 0x10

​

#define ACR_ASIZE_MASK  0x3

#define ACR_EW_MASK BIT(30)

#define ACR_SS_MASK BIT(31)

#define ASIZE_16BIT 1

​

#define CONFIG_MASK (TA(TA_MAX) | \

                RHOLD(RHOLD_MAX) | \

                RSTROBE(RSTROBE_MAX) |  \

                RSETUP(RSETUP_MAX) | \

                WHOLD(WHOLD_MAX) | \

                WSTROBE(WSTROBE_MAX) | \

                WSETUP(WSETUP_MAX) | \

                EW(EW_MAX) | SS(SS_MAX) | \

                ASIZE_MAX)

​

/**

 * struct aemif_cs_data: structure to hold cs parameters

 * @cs: chip-select number

 * @wstrobe: write strobe width, ns

 * @rstrobe: read strobe width, ns

 * @wsetup: write setup width, ns

 * @whold: write hold width, ns