/*      $NetBSD: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $    */

/*-
* Copyright (C) 2009 NONAKA Kimihiro <[email protected]>
* 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: wzero3_mci.c,v 1.4 2012/01/21 19:44:29 nonaka Exp $");

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

#include <machine/bootinfo.h>
#include <machine/platid.h>
#include <machine/platid_mask.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 <hpcarm/dev/wzero3_reg.h>

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

struct wzero3mci_softc {
       struct pxamci_softc sc;

       void *sc_detect_ih;
       int sc_detect_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(wzero3mci, sizeof(struct wzero3mci_softc),
   pxamci_match, pxamci_attach, NULL, NULL);

static int wzero3mci_intr(void *arg);

static uint32_t wzero3mci_get_ocr(void *);
static int wzero3mci_set_power(void *, uint32_t);
static int wzero3mci_card_detect(void *);
static int wzero3mci_write_protect(void *);

struct wzero3mci_model {
       platid_mask_t *platid;
       int detect_pin; /* card detect pin# */
       int power_pin;  /* card power pin # */
} wzero3mci_table[] = {
       /* WS003SH */
       {
               &platid_mask_MACH_SHARP_WZERO3_WS003SH,
               GPIO_WS003SH_SD_DETECT,
               GPIO_WS003SH_SD_POWER,
       },
       /* WS004SH */
       {
               &platid_mask_MACH_SHARP_WZERO3_WS004SH,
               GPIO_WS003SH_SD_DETECT,
               GPIO_WS003SH_SD_POWER,
       },
       /* WS007SH */
       {
               &platid_mask_MACH_SHARP_WZERO3_WS007SH,
               GPIO_WS007SH_SD_DETECT,
               GPIO_WS007SH_SD_POWER,
       },
       /* WS011SH */
       {
               &platid_mask_MACH_SHARP_WZERO3_WS011SH,
               GPIO_WS011SH_SD_DETECT,
               GPIO_WS011SH_SD_POWER,
       },
       /* WS0020H */
       {
               &platid_mask_MACH_SHARP_WZERO3_WS020SH,
               GPIO_WS020SH_SD_DETECT,
               GPIO_WS020SH_SD_POWER,
       },

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


static const struct wzero3mci_model *
wzero3mci_lookup(void)
{
       const struct wzero3mci_model *model;

       for (model = wzero3mci_table; model->platid != NULL; model++) {
               if (platid_match(&platid, model->platid)) {
                       return model;
               }
       }
       return NULL;
}

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

       if (strcmp(cf->cf_name, "pxamci") != 0)
               return 0;
       if (wzero3mci_lookup() == NULL)
               return 0;
       return 1;
}

static void
pxamci_attach(device_t parent, device_t self, void *aux)
{
       struct wzero3mci_softc *sc = device_private(self);
       struct pxaip_attach_args *pxa = aux;
       const struct wzero3mci_model *model;

       sc->sc.sc_dev = self;

       model = wzero3mci_lookup();
       if (model == NULL) {
               aprint_error(": Unknown model.");
               return;
       }

       sc->sc_detect_pin = model->detect_pin;
       sc->sc_power_pin = model->power_pin;

       /* Establish SD detect interrupt */
       if (sc->sc_detect_pin >= 0) {
               pxa2x0_gpio_set_function(sc->sc_detect_pin, GPIO_IN);
               sc->sc_detect_ih = pxa2x0_gpio_intr_establish(sc->sc_detect_pin,
                   IST_EDGE_BOTH, IPL_BIO, wzero3mci_intr, sc);
               if (sc->sc_detect_ih == NULL) {
                       aprint_error_dev(self,
                           "unable to establish card detect interrupt\n");
                       return;
               }
       }

       sc->sc.sc_tag.cookie = sc;
       sc->sc.sc_tag.get_ocr = wzero3mci_get_ocr;
       sc->sc.sc_tag.set_power = wzero3mci_set_power;
       sc->sc.sc_tag.card_detect = wzero3mci_card_detect;
       sc->sc.sc_tag.write_protect = wzero3mci_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
wzero3mci_intr(void *arg)
{
       struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;

       pxa2x0_gpio_clear_intr(sc->sc_detect_pin);

       pxamci_card_detect_event(&sc->sc);

       return 1;
}

/*ARGSUSED*/
static uint32_t
wzero3mci_get_ocr(void *arg)
{

       return MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V;
}

static int
wzero3mci_set_power(void *arg, uint32_t ocr)
{
       struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;
       int error = 0;

       if (sc->sc_power_pin >= 0) {
               if (ISSET(ocr, MMC_OCR_3_2V_3_3V|MMC_OCR_3_3V_3_4V)) {
                       /* power on */
                       pxa2x0_gpio_set_bit(sc->sc_power_pin);
               } else if (ocr == 0) {
                       /* power off */
                       pxa2x0_gpio_clear_bit(sc->sc_power_pin);
               } else {
                       aprint_error_dev(sc->sc.sc_dev,
                           "unsupported OCR (%#x)\n", ocr);
                       error = EINVAL;
               }
       }
       return error;
}

/*
* Return non-zero if the card is currently inserted.
*/
static int
wzero3mci_card_detect(void *arg)
{
       struct wzero3mci_softc *sc = (struct wzero3mci_softc *)arg;

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

/*
* Return non-zero if the card is currently write-protected.
*/
/*ARGSUSED*/
static int
wzero3mci_write_protect(void *arg)
{

       return 0;
}

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