linux-imx

// SPDX-License-Identifier: GPL-2.0

/*

 * Driver for the NXP ISP1760 chip

 *

 * Copyright 2014 Laurent Pinchart

 * Copyright 2007 Sebastian Siewior

 *

 * Contacts:

 *  Sebastian Siewior <bigeasy@linutronix.de>

 *  Laurent Pinchart <laurent.pinchart@ideasonboard.com>

 */

​

#include <linux/delay.h>

#include <linux/gpio/consumer.h>

#include <linux/io.h>

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/slab.h>

#include <linux/usb.h>

​

#include "isp1760-core.h"

#include "isp1760-hcd.h"

#include "isp1760-regs.h"

#include "isp1760-udc.h"

​

static void isp1760_init_core(struct isp1760_device *isp)

{

    u32 otgctrl;

    u32 hwmode;

​

    /* Low-level chip reset */

    if (isp->rst_gpio) {

        gpiod_set_value_cansleep(isp->rst_gpio, 1);

        msleep(50);

        gpiod_set_value_cansleep(isp->rst_gpio, 0);

    }

​

    /*

     * Reset the host controller, including the CPU interface

     * configuration.

     */

    isp1760_write32(isp->regs, HC_RESET_REG, SW_RESET_RESET_ALL);

    msleep(100);

​

    /* Setup HW Mode Control: This assumes a level active-low interrupt */

    hwmode = HW_DATA_BUS_32BIT;

​

    if (isp->devflags & ISP1760_FLAG_BUS_WIDTH_16)

        hwmode &= ~HW_DATA_BUS_32BIT;

    if (isp->devflags & ISP1760_FLAG_ANALOG_OC)

        hwmode |= HW_ANA_DIGI_OC;

    if (isp->devflags & ISP1760_FLAG_DACK_POL_HIGH)

        hwmode |= HW_DACK_POL_HIGH;

    if (isp->devflags & ISP1760_FLAG_DREQ_POL_HIGH)

        hwmode |= HW_DREQ_POL_HIGH;

    if (isp->devflags & ISP1760_FLAG_INTR_POL_HIGH)

        hwmode |= HW_INTR_HIGH_ACT;

    if (isp->devflags & ISP1760_FLAG_INTR_EDGE_TRIG)

        hwmode |= HW_INTR_EDGE_TRIG;

​

    /*

     * The ISP1761 has a dedicated DC IRQ line but supports sharing the HC

     * IRQ line for both the host and device controllers. Hardcode IRQ