/*      $NetBSD: zmci.c,v 1.5 2012/01/29 10:12:42 tsutsui Exp $ */

/*-
 * Copyright (C) 2006-2008 NONAKA Kimihiro <nonaka@netbsd.org>
 * 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 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 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: zmci.c,v 1.5 2012/01/29 10:12:42 tsutsui Exp $");

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

#include <machine/intr.h>

#include <arm/xscale/pxa2x0cpu.h>
#include <arm/xscale/pxa2x0reg.h>
#include <arm/xscale/pxa2x0var.h>
#include <arm/xscale/pxa2x0_gpio.h>
#include <arm/xscale/pxa2x0_mci.h>

#include <dev/sdmmc/sdmmcreg.h>

#include <zaurus/dev/scoopreg.h>
#include <zaurus/dev/scoopvar.h>

#include <zaurus/zaurus/zaurus_reg.h>
#include <zaurus/zaurus/zaurus_var.h>

#if defined(PXAMCI_DEBUG)
#define DPRINTF(s)      do { printf s; } while (0)
#else
#define DPRINTF(s)      do {} while (0)
#endif

struct zmci_softc {
        struct pxamci_softc sc;

        void *sc_detect_ih;
        int sc_detect_pin;
        int sc_wp_pin;
        int sc_power_pin;
};

static int pxamci_match(device_t, cfdata_t, void *);
static void pxamci_attach(device_t, device_t, void *);

CFATTACH_DECL_NEW(zmci, sizeof(struct zmci_softc),
    pxamci_match, pxamci_attach, NULL, NULL);

static int zmci_intr(void *arg);

static uint32_t zmci_get_ocr(void *);
static int zmci_set_power(void *, uint32_t);
static int zmci_card_detect(void *);
static int zmci_write_protect(void *);

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

        return 1;
}

static void
pxamci_attach(device_t parent, device_t self, void *aux)
{
        struct zmci_softc *sc = device_private(self);
        struct pxaip_attach_args *pxa = aux;

        sc->sc.sc_dev = self;

        if (ZAURUS_ISC1000 || ZAURUS_ISC3000) {
                sc->sc_detect_pin = C3000_GPIO_SD_DETECT_PIN;
                sc->sc_wp_pin = C3000_GPIO_SD_WP_PIN;
                pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
                pxa2x0_gpio_set_function(sc->sc_wp_pin, GPIO_IN);
        } else {
                /* C7x0/C860 */
                sc->sc_detect_pin = C860_GPIO_SD_DETECT_PIN;
                sc->sc_wp_pin = C860_GPIO_SD_WP_PIN;
                sc->sc_power_pin = C860_GPIO_SD_POWER_PIN;
                pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
                pxa2x0_gpio_set_function(sc->sc_wp_pin, GPIO_IN);
                pxa2x0_gpio_set_function(sc->sc_power_pin, GPIO_OUT|GPIO_SET);
        }

        /* Establish SD detect interrupt */
        sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
            IST_EDGE_BOTH, IPL_BIO, zmci_intr, sc);
        if (sc->sc_detect_ih == NULL) {
                aprint_error_dev(self,
                    "unable to establish nSD_DETECT interrupt\n");
                return;
        }

        sc->sc.sc_tag.cookie = sc;
        sc->sc.sc_tag.get_ocr = zmci_get_ocr;
        sc->sc.sc_tag.set_power = zmci_set_power;
        sc->sc.sc_tag.card_detect = zmci_card_detect;
        sc->sc.sc_tag.write_protect = zmci_write_protect;
        sc->sc.sc_caps = PMC_CAPS_4BIT;

        if (pxamci_attach_sub(self, pxa)) {
                aprint_error_dev(self, "unable to attach MMC controller\n");
                goto free_intr;
        }

        if (!pmf_device_register(self, NULL, NULL)) {
                aprint_error_dev(self, "couldn't establish power handler\n");
        }

        return;

free_intr:
        pxa2x0_gpio_intr_disestablish(sc->sc_detect_ih);
        sc->sc_detect_ih = NULL;
}

static int
zmci_intr(void *arg)
{
        struct zmci_softc *sc = (struct zmci_softc *)arg;

        pxa2x0_gpio_clear_intr(sc->sc_detect_pin);

        pxamci_card_detect_event(&sc->sc);

        return 1;
}

static uint32_t
zmci_get_ocr(void *arg)
{

        return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
}

static int
zmci_set_power(void *arg, uint32_t ocr)
{
        struct zmci_softc *sc = (struct zmci_softc *)arg;

        if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
                if (ZAURUS_ISC3000 || ZAURUS_ISC1000)
                        scoop_set_sdmmc_power(1);
                else if (ZAURUS_ISC860)
                        pxa2x0_gpio_set_bit(sc->sc_power_pin);
                return 0;
        }

        if (ocr != 0) {
                printf("%s: zmci_set_power(): unsupported OCR (%#x)\n",
                    device_xname(sc->sc.sc_dev), ocr);
                return EINVAL;
        }

        /* power off */
        if (ZAURUS_ISC3000 || ZAURUS_ISC1000)
                scoop_set_sdmmc_power(0);
        else if(ZAURUS_ISC860)
                pxa2x0_gpio_clear_bit(sc->sc_power_pin);
        return 0;
}

/*
 * Return non-zero if the card is currently inserted.
 */
static int
zmci_card_detect(void *arg)
{
        struct zmci_softc *sc = (struct zmci_softc *)arg;

        if (!pxa2x0_gpio_get_bit(sc->sc_detect_pin))
                return 1;
        return 0;
}

/*
 * Return non-zero if the card is currently write-protected.
 */
static int
zmci_write_protect(void *arg)
{
        struct zmci_softc *sc = (struct zmci_softc *)arg;

        if (pxa2x0_gpio_get_bit(sc->sc_wp_pin))
                return 1;
        return 0;
}