linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Driver for Intel MSIC

 *

 * Copyright (C) 2011, Intel Corporation

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

 */

​

#include <linux/err.h>

#include <linux/gpio.h>

#include <linux/io.h>

#include <linux/init.h>

#include <linux/mfd/core.h>

#include <linux/mfd/intel_msic.h>

#include <linux/platform_device.h>

#include <linux/slab.h>

​

#include <asm/intel_scu_ipc.h>

​

#define MSIC_VENDOR(id)     ((id >> 6) & 3)

#define MSIC_VERSION(id)    (id & 0x3f)

#define MSIC_MAJOR(id)      ('A' + ((id >> 3) & 7))

#define MSIC_MINOR(id)      (id & 7)

​

/*

 * MSIC interrupt tree is readable from SRAM at INTEL_MSIC_IRQ_PHYS_BASE.

 * Since IRQ block starts from address 0x002 we need to subtract that from

 * the actual IRQ status register address.

 */

#define MSIC_IRQ_STATUS(x)  (INTEL_MSIC_IRQ_PHYS_BASE + ((x) - 2))

#define MSIC_IRQ_STATUS_ACCDET  MSIC_IRQ_STATUS(INTEL_MSIC_ACCDET)

​

/*

 * The SCU hardware has limitation of 16 bytes per read/write buffer on

 * Medfield.

 */

#define SCU_IPC_RWBUF_LIMIT 16

​

/**

 * struct intel_msic - an MSIC MFD instance

 * @pdev: pointer to the platform device

 * @vendor: vendor ID

 * @version: chip version

 * @irq_base: base address of the mapped MSIC SRAM interrupt tree

 */

struct intel_msic {

    struct platform_device      *pdev;

    unsigned            vendor;

    unsigned            version;

    void __iomem            *irq_base;

};

​

static struct resource msic_touch_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_adc_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_battery_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_gpio_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_audio_resources[] = {

    DEFINE_RES_IRQ_NAMED(0, "IRQ"),

    /*

     * We will pass IRQ_BASE to the driver now but this can be removed

     * when/if the driver starts to use intel_msic_irq_read().

     */

    DEFINE_RES_MEM_NAMED(MSIC_IRQ_STATUS_ACCDET, 1, "IRQ_BASE"),

};

​

static struct resource msic_hdmi_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_thermal_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_power_btn_resources[] = {

    DEFINE_RES_IRQ(0),

};

​

static struct resource msic_ocd_resources[] = {

    DEFINE_RES_IRQ(0),

};