/*      $NetBSD: wzero3_usb.c,v 1.2 2011/07/19 15:37:39 dyoung Exp $    */

/*
 * Copyright (c) 2009 NONAKA Kimihiro <nonaka@netbsd.org>
 * All rights reserved.
 *
 * 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 AUTHOR ``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 AUTHOR 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: wzero3_usb.c,v 1.2 2011/07/19 15:37:39 dyoung Exp $");

#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/bus.h>

#include <arm/xscale/pxa2x0reg.h>
#include <arm/xscale/pxa2x0var.h>
#include <arm/xscale/pxa2x0_gpio.h>

#include <machine/bootinfo.h>
#include <machine/config_hook.h>
#include <machine/platid.h>
#include <machine/platid_mask.h>

#include <hpcarm/dev/wzero3_reg.h>

#if defined(WZERO3USB_DEBUG)
#define DPRINTF(s)      printf s
#else
#define DPRINTF(s)
#endif

struct wzero3usb_softc {
        device_t sc_dev;

        bus_space_tag_t sc_iot;
        bus_space_handle_t sc_ioh;

        int sc_client_pin;
        int sc_host_pin;
        int sc_host_power_pin;

        void *sc_client_ih;
        void *sc_host_ih;
};

static int wzero3usb_match(device_t, cfdata_t, void *);
static void wzero3usb_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(wzero3usb, sizeof(struct wzero3usb_softc), 
    wzero3usb_match, wzero3usb_attach, NULL, NULL);

static int wzero3usb_client_intr(void *);
static int wzero3usb_host_intr(void *);
static void wzero3usb_host_power(struct wzero3usb_softc *);

static const struct wzero3usb_model {
        platid_mask_t *platid;
        int client_pin;
        int host_pin;
        int host_power_pin;
} wzero3usb_table[] = {
        /* WS003SH */
        {
                &platid_mask_MACH_SHARP_WZERO3_WS003SH,
                GPIO_WS003SH_USB_CLIENT_DETECT,
                -1,     /* None */
                -1,     /* None */
        },
        /* WS004SH */
        {
                &platid_mask_MACH_SHARP_WZERO3_WS004SH,
                GPIO_WS003SH_USB_CLIENT_DETECT,
                -1,     /* None */
                -1,     /* None */
        },
        /* WS007SH */
        {
                &platid_mask_MACH_SHARP_WZERO3_WS007SH,
                GPIO_WS007SH_USB_CLIENT_DETECT,
                GPIO_WS007SH_USB_HOST_DETECT,
                GPIO_WS007SH_USB_HOST_POWER,
        },
        /* WS011SH */
        {
                &platid_mask_MACH_SHARP_WZERO3_WS011SH,
                GPIO_WS011SH_USB_CLIENT_DETECT,
                GPIO_WS011SH_USB_HOST_DETECT,
                GPIO_WS011SH_USB_HOST_POWER,
        },
        /* XXX: WS020SH */

        { NULL, -1, -1, -1, }
};

static const struct wzero3usb_model *
wzero3usb_lookup(void)
{
        const struct wzero3usb_model *model;

        for (model = wzero3usb_table; model->platid != NULL; model++) {
                if (platid_match(&platid, model->platid)) {
                        return model;
                }
        }
        return NULL;
}

static int
wzero3usb_match(device_t parent, cfdata_t cf, void *aux)
{

        if (strcmp(cf->cf_name, "wzero3usb") != 0)
                return 0;
        if (wzero3usb_lookup() == NULL)
                return 0;
        return 1;
}

static void
wzero3usb_attach(device_t parent, device_t self, void *aux)
{
        struct wzero3usb_softc *sc = device_private(self);
        struct pxaip_attach_args *pxa = aux;
        const struct wzero3usb_model *model;

        sc->sc_dev = self;
        sc->sc_iot = pxa->pxa_iot;

        aprint_normal(": USB Mode detection\n");

        model = wzero3usb_lookup();
        if (model == NULL) {
                aprint_error_dev(self, "unknown model\n");
                return;
        }
        sc->sc_client_pin = model->client_pin;
        sc->sc_host_pin = model->host_pin;
        sc->sc_host_power_pin = model->host_power_pin;

        if (bus_space_map(sc->sc_iot, PXA2X0_USBDC_BASE, PXA270_USBDC_SIZE, 0,
                                &sc->sc_ioh)) {
                aprint_error_dev(self, "couldn't map memory space\n");
                return;
        }

        if (sc->sc_client_pin >= 0) {
                sc->sc_client_ih = pxa2x0_gpio_intr_establish(sc->sc_client_pin,
                    IST_EDGE_BOTH, IPL_BIO, wzero3usb_client_intr, sc);
        }
        if (sc->sc_host_pin >= 0) {
                sc->sc_host_ih = pxa2x0_gpio_intr_establish(sc->sc_host_pin,
                    IST_EDGE_BOTH, IPL_BIO, wzero3usb_host_intr, sc);
        }

        /* configure port 2 for input */
        bus_space_write_4(sc->sc_iot, sc->sc_ioh, USBDC_UP2OCR,
                        USBDC_UP2OCR_HXS | USBDC_UP2OCR_HXOE | 
                        USBDC_UP2OCR_DPPDE | USBDC_UP2OCR_DMPDE);

        wzero3usb_host_power(sc);
}

static int
wzero3usb_host_intr(void *v)
{
        struct wzero3usb_softc *sc = (struct wzero3usb_softc *)v;

        DPRINTF(("%s: USB host cable changed: level = %s\n",
            device_xname(sc->sc_dev),
            pxa2x0_gpio_get_bit(sc->sc_host_pin) ? "H" : "L"));

        wzero3usb_host_power(sc);

        return 1;
}

static int
wzero3usb_client_intr(void *v)
{
        struct wzero3usb_softc *sc = (struct wzero3usb_softc *)v;

        DPRINTF(("%s: USB client cable changed: level = %s\n",
            device_xname(sc->sc_dev),
            pxa2x0_gpio_get_bit(sc->sc_client_pin) ? "H" : "L"));

        (void)sc; /*XXX*/

        return 1;
}

static void
wzero3usb_host_power(struct wzero3usb_softc *sc)
{
        int host_cable;

        if (sc->sc_host_pin >= 0 && sc->sc_host_power_pin >= 0) {
                host_cable = pxa2x0_gpio_get_bit(sc->sc_host_pin);

                if (!host_cable) {
                        DPRINTF(("%s: enable USB host power\n",
                            device_xname(sc->sc_dev)));
                        pxa2x0_gpio_set_bit(sc->sc_host_power_pin);
                } else {
                        DPRINTF(("%s: disable USB host power\n",
                            device_xname(sc->sc_dev)));
                        pxa2x0_gpio_clear_bit(sc->sc_host_power_pin);
                }
        }
}