/*      $NetBSD: ingenic_dwctwo.c,v 1.15 2021/08/07 16:18:59 thorpej Exp $ */

/*-
 * Copyright (c) 2014 Michael Lorenz
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ingenic_dwctwo.c,v 1.15 2021/08/07 16:18:59 thorpej Exp $");

/*
 * adapted from bcm2835_dwctwo.c
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/workqueue.h>

#include <mips/ingenic/ingenic_var.h>
#include <mips/ingenic/ingenic_regs.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdivar.h>
#include <dev/usb/usb_mem.h>
#include <dev/usb/usbdevs.h>

#include <dwc2/dwc2var.h>
#include <dwc2/dwc2.h>
#include "dwc2_core.h"

#include "opt_ingenic.h"

struct ingenic_dwc2_softc {
        struct dwc2_softc       sc_dwc2;

        void                    *sc_ih;
};

static struct dwc2_core_params ingenic_dwc2_params = {
        .otg_cap                        = -1,   /* HNP/SRP capable */
        .otg_ver                        = -1,   /* 1.3 */
        .dma_enable                     = 1,
        .dma_desc_enable                = 0,
        .speed                          = -1,   /* High Speed */
        .enable_dynamic_fifo            = -1,
        .en_multiple_tx_fifo            = -1,
        .host_rx_fifo_size              = 1024, /* 1024 DWORDs */
        .host_nperio_tx_fifo_size       = 1024, /* 1024 DWORDs */
        .host_perio_tx_fifo_size        = 1024, /* 1024 DWORDs */
        .max_transfer_size              = -1,
        .max_packet_count               = -1,
        .host_channels                  = -1,
        .phy_type                       = -1,   /* UTMI */
        .phy_utmi_width                 = -1,   /* 16 bits */
        .phy_ulpi_ddr                   = -1,   /* Single */
        .phy_ulpi_ext_vbus              = -1,
        .i2c_enable                     = -1,
        .ulpi_fs_ls                     = -1,
        .host_support_fs_ls_low_power   = -1,
        .host_ls_low_power_phy_clk      = -1,   /* 48 MHz */
        .ts_dline                       = -1,
        .reload_ctl                     = -1,
        .ahbcfg                         = -1,
        .uframe_sched                   = 0,
        .external_id_pin_ctl            = -1,
        .hibernation                    = -1,
};

static int ingenic_dwc2_match(device_t, struct cfdata *, void *);
static void ingenic_dwc2_attach(device_t, device_t, void *);
static void ingenic_dwc2_deferred(device_t);

CFATTACH_DECL_NEW(ingenic_dwctwo, sizeof(struct ingenic_dwc2_softc),
    ingenic_dwc2_match, ingenic_dwc2_attach, NULL, NULL);

/* ARGSUSED */
static int
ingenic_dwc2_match(device_t parent, struct cfdata *match, void *aux)
{
        struct apbus_attach_args *aa = aux;

        if (strcmp(aa->aa_name, "dwctwo") != 0)
                return 0;

        return 1;
}

/* ARGSUSED */
static void
ingenic_dwc2_attach(device_t parent, device_t self, void *aux)
{
        struct ingenic_dwc2_softc *sc = device_private(self);
        struct apbus_attach_args *aa = aux;
        uint32_t reg;
        int error;

        sc->sc_dwc2.sc_dev = self;

        sc->sc_dwc2.sc_iot = aa->aa_bst;
        sc->sc_dwc2.sc_bus.ub_dmatag = aa->aa_dmat;
        sc->sc_dwc2.sc_params = &ingenic_dwc2_params;

        if (aa->aa_addr == 0)
                aa->aa_addr = JZ_DWC2_BASE;

        error = bus_space_map(aa->aa_bst, aa->aa_addr, 0x20000, 0,
            &sc->sc_dwc2.sc_ioh);
        if (error) {
                aprint_error_dev(self,
                    "can't map registers for %s: %d\n", aa->aa_name, error);
                return;
        }

        aprint_naive(": USB OTG controller\n");
        aprint_normal(": USB OTG controller\n");

        /* reset PHY, flash LED */
        gpio_set(5, 15, 0);
        delay(250000);
        gpio_set(5, 15, 1);

        reg = readreg(JZ_USBPCR);
        reg |= PCR_VBUSVLDEXTSEL;
        reg |= PCR_VBUSVLDEXT;
        reg |= PCR_USB_MODE;
        reg |= PCR_COMMONONN;
        reg &= ~PCR_OTG_DISABLE;
        writereg(JZ_USBPCR, reg);
#ifdef INGENIC_DEBUG
        printf("JZ_USBPCR  %08x\n", reg);
#endif

        reg = readreg(JZ_USBPCR1);
#ifdef INGENIC_DEBUG
        printf("JZ_USBPCR1 %08x\n", reg);
#endif
        reg &= ~0xf0000000;
        reg |= PCR_SYNOPSYS;
        reg |= PCR_REFCLK_CORE;
        reg &= ~PCR_CLK_M;
        reg |= PCR_CLK_48;
        reg |= PCR_WORD_I_F0;
        reg |= PCR_WORD_I_F1;
        writereg(JZ_USBPCR1, reg);
#ifdef INGENIC_DEBUG
        printf("JZ_USBPCR1 %08x\n", reg);
        printf("JZ_USBRDT  %08x\n", readreg(JZ_USBRDT));
#endif

        writereg(JZ_USBVBFIL, 0);
        delay(10000);

        reg = readreg(JZ_USBPCR);
        reg |= PCR_POR;
        writereg(JZ_USBPCR, reg);
        delay(1000);
        reg &= ~PCR_POR;
        writereg(JZ_USBPCR, reg);

        delay(10000);

        /* wake up the USB part */
        reg = readreg(JZ_OPCR);
        reg |= OPCR_SPENDN0;
        writereg(JZ_OPCR, reg);

        sc->sc_ih = evbmips_intr_establish(aa->aa_irq, dwc2_intr, &sc->sc_dwc2);

        if (sc->sc_ih == NULL) {
                aprint_error_dev(self, "failed to establish interrupt %d\n",
                     aa->aa_irq);
                goto fail;
        }

        config_defer(self, ingenic_dwc2_deferred);

        return;

fail:
        if (sc->sc_ih) {
                evbmips_intr_disestablish(sc->sc_ih);
                sc->sc_ih = NULL;
        }
        bus_space_unmap(sc->sc_dwc2.sc_iot, sc->sc_dwc2.sc_ioh, 0x20000);
}

static void
ingenic_dwc2_deferred(device_t self)
{
        struct ingenic_dwc2_softc *sc = device_private(self);
        int error;

        error = dwc2_init(&sc->sc_dwc2);
        if (error != 0) {
                aprint_error_dev(self, "couldn't initialize host, error=%d\n",
                    error);
                return;
        }
        sc->sc_dwc2.sc_child = config_found(sc->sc_dwc2.sc_dev,
            &sc->sc_dwc2.sc_bus, usbctlprint, CFARGS_NONE);
}