linux-imx

/*

 * Intel Sunrisepoint LPSS core support.

 *

 * Copyright (C) 2015, Intel Corporation

 *

 * Authors: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

 *          Mika Westerberg <mika.westerberg@linux.intel.com>

 *          Heikki Krogerus <heikki.krogerus@linux.intel.com>

 *          Jarkko Nikula <jarkko.nikula@linux.intel.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/clkdev.h>

#include <linux/clk-provider.h>

#include <linux/debugfs.h>

#include <linux/idr.h>

#include <linux/ioport.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/mfd/core.h>

#include <linux/pm_qos.h>

#include <linux/pm_runtime.h>

#include <linux/property.h>

#include <linux/seq_file.h>

#include <linux/io-64-nonatomic-lo-hi.h>

​

#include "intel-lpss.h"

​

#define LPSS_DEV_OFFSET     0x000

#define LPSS_DEV_SIZE       0x200

#define LPSS_PRIV_OFFSET    0x200

#define LPSS_PRIV_SIZE      0x100

#define LPSS_PRIV_REG_COUNT (LPSS_PRIV_SIZE / 4)

#define LPSS_IDMA64_OFFSET  0x800

#define LPSS_IDMA64_SIZE    0x800

​

/* Offsets from lpss->priv */

#define LPSS_PRIV_RESETS        0x04

#define LPSS_PRIV_RESETS_IDMA       BIT(2)

#define LPSS_PRIV_RESETS_FUNC       0x3

​

#define LPSS_PRIV_ACTIVELTR     0x10

#define LPSS_PRIV_IDLELTR       0x14

​

#define LPSS_PRIV_LTR_REQ       BIT(15)

#define LPSS_PRIV_LTR_SCALE_MASK    0xc00

#define LPSS_PRIV_LTR_SCALE_1US     0x800

#define LPSS_PRIV_LTR_SCALE_32US    0xc00

#define LPSS_PRIV_LTR_VALUE_MASK    0x3ff

​

#define LPSS_PRIV_SSP_REG       0x20

#define LPSS_PRIV_SSP_REG_DIS_DMA_FIN   BIT(0)

​

#define LPSS_PRIV_REMAP_ADDR        0x40

​

#define LPSS_PRIV_CAPS          0xfc

#define LPSS_PRIV_CAPS_NO_IDMA      BIT(8)

#define LPSS_PRIV_CAPS_TYPE_SHIFT   4

#define LPSS_PRIV_CAPS_TYPE_MASK    (0xf << LPSS_PRIV_CAPS_TYPE_SHIFT)

​

/* This matches the type field in CAPS register */

enum intel_lpss_dev_type {

    LPSS_DEV_I2C = 0,

    LPSS_DEV_UART,

    LPSS_DEV_SPI,

};

​

struct intel_lpss {

    const struct intel_lpss_platform_info *info;

    enum intel_lpss_dev_type type;

    struct clk *clk;

    struct clk_lookup *clock;

    struct mfd_cell *cell;

    struct device *dev;

    void __iomem *priv;

    u32 priv_ctx[LPSS_PRIV_REG_COUNT];

    int devid;

    u32 caps;

    u32 active_ltr;

    u32 idle_ltr;

    struct dentry *debugfs;

};

​

static const struct resource intel_lpss_dev_resources[] = {

    DEFINE_RES_MEM_NAMED(LPSS_DEV_OFFSET, LPSS_DEV_SIZE, "lpss_dev"),

    DEFINE_RES_MEM_NAMED(LPSS_PRIV_OFFSET, LPSS_PRIV_SIZE, "lpss_priv"),

    DEFINE_RES_IRQ(0),

};