/*-
 * Copyright (c) 2012 The NetBSD Foundation, Inc.
 * All rights reserved.
 *
 * This code is derived from software contributed to The NetBSD Foundation
 * by Paul Fleischer <paul@xpg.dk>
 *
 * 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.
 */

/*
 * All SD/MMC code is taken from various files in sys/dev/sdmmc
 */
/*
 * Copyright (c) 2006 Uwe Stuehler <uwe@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*-
 * Copyright (c) 2007-2010 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 REGENTS 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 REGENTS 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 <machine/limits.h>

#include <sys/param.h>
#include <sys/types.h>
#include <sys/disklabel.h>

#include <netinet/in.h>

#include <lib/libsa/stand.h>

#include <lib/libkern/libkern.h>
#include <lib/libsa/stand.h>
#include <lib/libsa/iodesc.h>

#include <dev/sdmmc/sdmmcreg.h>
#include "dev_sdmmc.h"
#include "s3csdi.h"

//#define SDMMC_DEBUG
#ifdef SDMMC_DEBUG
#define DPRINTF(s) do {printf s; } while (/*CONSTCOND*/0)
#else
#define DPRINTF(s) do {} while (/*CONSTCOND*/0)
#endif

/* SD/MMC device driver structure */
struct sdifdv {
        char*                   name;
        int                     (*match)(unsigned);
        void*                   (*init)(unsigned, uint32_t*);
        int                     (*host_ocr)(void*);
        int                     (*bus_clock)(void*, int);
        int                     (*bus_power)(void*, int);
        int                     (*bus_width)(void*, int);
        void                    (*exec_cmd)(void*, struct sdmmc_command*);
        int                     (*get_max_bus_clock)(void*);
        void*                   priv;
};

struct sdmmc_softc;

/* Structure used for of->f_devdata */
struct sdmmc_part {
        struct sdmmc_softc      *sc;
        struct partition        *part;
};

/* SD/MMC driver structure */
struct sdmmc_softc {
        uint32_t                flags;
        uint32_t                caps;
        uint16_t                rca;            /* relative card address */
        sdmmc_response          raw_cid;        /* temp. storage for decoding */
        uint32_t                raw_scr[2];
        struct sdmmc_csd        csd;            /* decoded CSD value */
        struct sdmmc_cid        cid;            /* decoded CID value */
        struct sdmmc_scr        scr;
        int                     busclk;
        struct sdifdv           *sdifdv;
        struct disklabel        sc_label;
        int                     npartitions;
        struct sdmmc_part       partitions[MAXPARTITIONS];
};

static struct sdifdv vnifdv[] = {
        {"S3C SD/MMC", s3csd_match, s3csd_init, s3csd_host_ocr,
         s3csd_bus_clock, s3csd_bus_power, s3csd_bus_width, s3csd_exec_cmd,
         s3csd_get_max_bus_clock}
};
static int nnifdv = sizeof(vnifdv)/sizeof(vnifdv[0]);

static struct sdmmc_softc sdmmc_softc;
static uint8_t sdmmc_initialized = FALSE;

extern time_t getsecs();
extern time_t getusecs();
extern void usleep(int);

/* Local functions */
static int sdmmc_getdisklabel(struct sdmmc_softc *sc);
static int sdmmc_init(unsigned int tag);
static int sdmmc_enable(struct sdmmc_softc*);

static int sdmmc_mem_send_if_cond(struct sdmmc_softc*, uint32_t, uint32_t*);
static int sdmmc_mmc_command(struct sdmmc_softc*, struct sdmmc_command*);
static void sdmmc_go_idle_state(struct sdmmc_softc*);
static int sdmmc_mem_send_op_cond(struct sdmmc_softc*, uint32_t, uint32_t *);
static int sdmmc_set_bus_power(struct sdmmc_softc*, uint32_t, uint32_t);
static int sdmmc_app_command(struct sdmmc_softc*, uint16_t,
                             struct sdmmc_command*);
static int sdmmc_mmc_command(struct sdmmc_softc*, struct sdmmc_command*);
static int sdmmc_scan(struct sdmmc_softc*);
static void sdmmc_mem_scan(struct sdmmc_softc*);
static int sdmmc_set_relative_addr(struct sdmmc_softc*);
static int sdmmc_mem_send_cid(struct sdmmc_softc*, sdmmc_response*);

static int sdmmc_mem_send_csd(struct sdmmc_softc*, sdmmc_response*);
static int sdmmc_decode_csd(struct sdmmc_softc*, sdmmc_response);
static int sdmmc_decode_cid(struct sdmmc_softc*, sdmmc_response);

static int sdmmc_mem_read_block(struct sdmmc_softc*, uint32_t, u_char*, size_t);
static int sdmmc_select_card(struct sdmmc_softc*);
static int sdmmc_mem_set_blocklen(struct sdmmc_softc*);

static int sdmmc_mem_send_scr(struct sdmmc_softc*, uint32_t[2]);
static int sdmmc_mem_decode_scr(struct sdmmc_softc*);
static int sdmmc_set_bus_width(struct sdmmc_softc*, int);
static int sdmmc_mem_sd_switch(struct sdmmc_softc *, int, int, int, void*);

#ifdef SDMMC_DEBUG
static void sdmmc_dump_data(const char*, void*, size_t);
static void sdmmc_print_cid(struct sdmmc_cid*);
static void sdmmc_dump_command(struct sdmmc_softc*, struct sdmmc_command*);
#endif

int
sdmmc_open(struct open_file *of, ...)
{
        va_list ap;
        int unit __unused, part;

        va_start(ap, of);
        unit = va_arg(ap, u_int); /* Not used for now */
        part = va_arg(ap, u_int);
        va_end(ap);

        /* Simply try to initialize SD mem sub system. */
        if( !sdmmc_init(0) ) {
                return 1;
        }

        of->f_devdata = (void*)&sdmmc_softc.partitions[part];

        return 0;
}

int
sdmmc_close(struct open_file *f)
{
        return (0);
}

int
sdmmc_get_fstype(void *p)  {
        struct sdmmc_part *part = (struct sdmmc_part*)p;

        return part->part->p_fstype;
}


int
sdmmc_strategy(void *d, int f, daddr_t b, size_t s, void *buf, size_t *r)
{
        struct sdmmc_part *part = (struct sdmmc_part*)d;
        unsigned int offset;
        switch(f) {
        case F_READ:
                offset = part->part->p_offset + b;
                *r = s;
                if(sdmmc_mem_read_block(part->sc, offset, buf, s) == 0)
                        return 0;
                else
                        return EIO;
        default:
                printf("Unsupported operation\n");
                break;
        }
        return (EIO);
}

int
sdmmc_getdisklabel(struct sdmmc_softc *sc)
{
        char *msg;
        int sector, i, n;
        size_t rsize;
        struct mbr_partition *dp, *bsdp;
        struct disklabel *lp;
        /*uint8_t *buf = wd->sc_buf;*/
        uint8_t buf[DEV_BSIZE];

        lp = &sc->sc_label;
        memset(lp, 0, sizeof(struct disklabel));

        sector = 0;
        if (sdmmc_strategy(&sc->partitions[0], F_READ, MBR_BBSECTOR, DEV_BSIZE,
                           buf, &rsize))
                return EOFFSET;

        dp = (struct mbr_partition *)(buf + MBR_PART_OFFSET);
        bsdp = NULL;
        for (i = 0; i < MBR_PART_COUNT; i++, dp++) {
                if (dp->mbrp_type == MBR_PTYPE_NETBSD) {
                        bsdp = dp;
                        break;
                }
        }
        if (!bsdp) {
                /* generate fake disklabel */
                lp->d_secsize = DEV_BSIZE;
                /*lp->d_ntracks = wd->sc_params.atap_heads;
                lp->d_nsectors = wd->sc_params.atap_sectors;
                lp->d_ncylinders = wd->sc_params.atap_cylinders;*/
                lp->d_secpercyl = lp->d_ntracks * lp->d_nsectors;
                lp->d_type = DKTYPE_FLASH;
                /*strncpy(lp->d_typename, (char *)wd->sc_params.atap_model, 16);*/
                strncpy(lp->d_packname, "fictitious", 16);
                /*if (wd->sc_capacity > UINT32_MAX)
                        lp->d_secperunit = UINT32_MAX;
                else
                lp->d_secperunit = wd->sc_capacity;*/
                lp->d_rpm = 3600;
                lp->d_interleave = 1;
                lp->d_flags = 0;
                lp->d_partitions[RAW_PART].p_offset = 0;
                lp->d_partitions[RAW_PART].p_size =
                        lp->d_secperunit * (lp->d_secsize / DEV_BSIZE);
                lp->d_partitions[RAW_PART].p_fstype = FS_UNUSED;
                lp->d_magic = DISKMAGIC;
                lp->d_magic2 = DISKMAGIC;
                lp->d_checksum = dkcksum(lp);

                dp = (struct mbr_partition *)(buf + MBR_PART_OFFSET);
                n = 'e' - 'a';
                for (i = 0; i < MBR_PART_COUNT; i++, dp++) {
                        if (dp->mbrp_type == MBR_PTYPE_UNUSED)
                                continue;
                        lp->d_partitions[n].p_offset = bswap32(dp->mbrp_start);
                        lp->d_partitions[n].p_size = bswap32(dp->mbrp_size);
                        switch (dp->mbrp_type) {
                        case MBR_PTYPE_FAT12:
                        case MBR_PTYPE_FAT16S:
                        case MBR_PTYPE_FAT16B:
                        case MBR_PTYPE_FAT32:
                        case MBR_PTYPE_FAT32L:
                        case MBR_PTYPE_FAT16L:
                                lp->d_partitions[n].p_fstype = FS_MSDOS;
                                break;
                        case MBR_PTYPE_LNXEXT2:
                                lp->d_partitions[n].p_fstype = FS_EX2FS;
                                break;
                        default:
                                lp->d_partitions[n].p_fstype = FS_OTHER;
                                break;
                        }
                        n += 1;
                }
                lp->d_npartitions = n;
        }
        else {
                sector = bsdp->mbrp_start;
                if (sdmmc_strategy(&sc->partitions[0], F_READ,
                                   sector + LABELSECTOR, DEV_BSIZE,
                                   buf, &rsize))
                        return EOFFSET;
                msg = getdisklabel((char *)buf + LABELOFFSET, &sc->sc_label);
                if (msg != NULL)
                        printf("getdisklabel: %s\n", msg);
        }
        /*DPRINTF(("label info: d_secsize %d, d_nsectors %d, d_ncylinders %d,"
                 "d_ntracks %d, d_secpercyl %d\n",
                 wd->sc_label.d_secsize,
                 wd->sc_label.d_nsectors,
                 wd->sc_label.d_ncylinders,
                 wd->sc_label.d_ntracks,
                 wd->sc_label.d_secpercyl));*/

        return 0;
}

void
sdmmc_delay(int us) {
        usleep(us);
}

/* Initialize the SD/MMC subsystem. Return 1 on success, and 0 on error.
   In case of error, errno will be set to a sane value.
 */
int
sdmmc_init(unsigned int tag)
{
        struct sdifdv *dv;
        int n;
        int error;
        struct sdmmc_softc *sc = &sdmmc_softc;
        char status[64];

        if (sdmmc_initialized) {
                printf("SD/MMC already initialized\n");
                return 1;
        }

        for (n = 0; n < nnifdv; n++) {
                dv = &vnifdv[n];
                if ((*dv->match)(tag) > 0)
                        goto found;
        }
        errno = ENODEV;
        return 0;
 found:
        sc->caps = 0;
        /* Init should return NULL if no card is present. */
        sc->sdifdv->priv = (*dv->init)(tag, &sc->caps);
        if (sc->sdifdv->priv == NULL) {
                /* We expect that the device initialization sets
                   errno properly */
                return 0;
        }

        sc->flags = 0;
        sc->sdifdv = dv;

        /* Perform SD-card initialization. */
        if( sdmmc_enable(sc) ) {
                printf("Failed to enable SD interface\n");
                errno = EIO;
                return 0;
        }
        sc->busclk = sc->sdifdv->get_max_bus_clock(sc->sdifdv->priv);

        if (sdmmc_scan(sc)) {
                printf("No functions\n");
                errno = EIO;
                return 0;
        }

        if (sdmmc_select_card(sc)) {
                printf("Failed to select card\n");
                errno = EIO;
                return 0;
        }

        if (!ISSET(sc->flags, SMF_CARD_SDHC)) {
                sdmmc_mem_set_blocklen(sc);
        }

        /* change bus width if supported */
        if (ISSET(sc->flags, SMF_SD_MODE) ) {
                error = sdmmc_mem_send_scr(sc, sc->raw_scr);
                if (error) {
                        DPRINTF(("SD_SEND_SCR send failed.\n"));
                        errno = EIO;
                        return 0;
                }
                error = sdmmc_mem_decode_scr(sc);
                if (error) {
                        errno = EIO;
                        return 0;
                }

                if (ISSET(sc->caps, SMC_CAPS_4BIT_MODE) &&
                    ISSET(sc->scr.bus_width, SCR_SD_BUS_WIDTHS_4BIT)) {
                        error = sdmmc_set_bus_width(sc, 4);
                        if (error) {
                                DPRINTF(("can't change bus width"
                                    " (%d bit)\n", 4));
                                errno = EIO;
                                return 0;
                        }
                }

#if 1
                if (sc->scr.sd_spec >= SCR_SD_SPEC_VER_1_10 &&
                    ISSET(sc->csd.ccc, SD_CSD_CCC_SWITCH)) {
                        DPRINTF(("switch func mode 0\n"));
                        error = sdmmc_mem_sd_switch(sc, 0, 1, 0, status);
                        if (error) {
                                printf("switch func mode 0 failed\n");
                                errno = error;
                                return 0;
                        }
                }
#endif
                sc->sdifdv->bus_clock(sc->sdifdv->priv, sc->busclk);
        }

        /* Prepare dummy partition[0] entry used by sdmmc_getdisklabel() */
        sc->partitions[0].sc = sc;
        sc->partitions[0].part->p_offset = 0;

        if(sdmmc_getdisklabel(sc)) {
                errno = EOFFSET;
                return 0;
        }

        sc->npartitions = sc->sc_label.d_npartitions;
        for(n=0; n<sc->sc_label.d_npartitions; n++) {
                sc->partitions[n].part = &sc->sc_label.d_partitions[n];
                sc->partitions[n].sc = sc;
        }

        sdmmc_initialized = TRUE;

        return 1;
}

int
sdmmc_enable(struct sdmmc_softc *sc)
{
        uint32_t card_ocr;
        uint32_t ocr = 0;
        uint32_t host_ocr;
        int error;

        /* 1. Set the maximum power supported by bus */
        /* For now, we expect the init function to set the maximum
           voltage. And if that is not supported by the SD-card we
           just cannot work with it.
         */

        sc->busclk = 400;
        /* 2. Clock bus at minimum frequency */
        sc->sdifdv->bus_clock(sc->sdifdv->priv, 400);

        /* We expect that the above call has performed any waiting needed.*/

        /* Initialize SD/MMC memory card(s), which is the only thing
           we support.
         */

        /* Set host mode to SD "combo" card or SD memory-only. */
        SET(sc->flags, SMF_SD_MODE|SMF_MEM_MODE);

        sdmmc_go_idle_state(sc);

        error = sdmmc_mem_send_if_cond(sc, 0x1aa, &card_ocr);
        if (error == 0 && card_ocr == 0x1aa)
                SET(ocr, MMC_OCR_HCS);

        /*
         * Read the SD/MMC memory OCR value by issuing CMD55 followed
         * by ACMD41 to read the OCR value from memory-only SD cards.
         * MMC cards will not respond to CMD55 or ACMD41 and this is
         * how we distinguish them from SD cards.
         */
mmc_mode:
        error = sdmmc_mem_send_op_cond(sc,
          ISSET(sc->caps, SMC_CAPS_SPI_MODE) ? ocr : 0, &card_ocr);
        if (error) {
                if (ISSET(sc->flags, SMF_SD_MODE) &&
                    !ISSET(sc->flags, SMF_IO_MODE)) {
                        /* Not a SD card, switch to MMC mode. */
                        DPRINTF(("Switch to MMC mode\n"));
                        CLR(sc->flags, SMF_SD_MODE);
                        goto mmc_mode;
                }
                if (!ISSET(sc->flags, SMF_SD_MODE)) {
                        DPRINTF(("couldn't read memory OCR\n"));
                        goto out;
                } else {
                        /* Not a "combo" card. */
                        CLR(sc->flags, SMF_MEM_MODE);
                        error = 0;
                        goto out;
                }
        }
#if 0 /* SPI NOT SUPPORTED */
        if (ISSET(ssc->caps, SMC_CAPS_SPI_MODE)) {
                /* get card OCR */
                error = sdmmc_mem_spi_read_ocr(sc, ocr, &card_ocr);
                if (error) {
                        DPRINTF(("%s: couldn't read SPI memory OCR\n",
                            SDMMCDEVNAME(sc)));
                        goto out;
                }
        }
#endif

        /* Set the lowest voltage supported by the card and host. */
        host_ocr = sc->sdifdv->host_ocr(sc->sdifdv->priv);
        error = sdmmc_set_bus_power(sc, host_ocr, card_ocr);
        if (error) {
                DPRINTF(("Couldn't supply voltage requested by card\n"));
                goto out;
        }
        host_ocr &= card_ocr;
        host_ocr |= ocr;

        /* Send the new OCR value until all cards are ready. */
        error = sdmmc_mem_send_op_cond(sc, host_ocr, NULL);
        if (error) {
                DPRINTF(("Couldn't send memory OCR\n"));
                goto out;
        }

out:
        return error;
}

int
sdmmc_mem_send_if_cond(struct sdmmc_softc *sc, uint32_t ocr, uint32_t *ocrp)
{
        struct sdmmc_command cmd;
        int error;

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_arg = ocr;
        cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R7 | SCF_RSP_SPI_R7;
        cmd.c_opcode = SD_SEND_IF_COND;

        error = sdmmc_mmc_command(sc, &cmd);
        if (error == 0 && ocrp != NULL) {
                *ocrp = MMC_R7(cmd.c_resp);
        }

        return error;
}

void
sdmmc_go_idle_state(struct sdmmc_softc *sc)
{
        struct sdmmc_command cmd;

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_opcode = MMC_GO_IDLE_STATE;
        cmd.c_flags = SCF_CMD_BC | SCF_RSP_R0 | SCF_RSP_SPI_R1;

        (void)sdmmc_mmc_command(sc, &cmd);
}
int
sdmmc_mem_send_op_cond(struct sdmmc_softc *sc, uint32_t ocr, uint32_t *ocrp)
{
        struct sdmmc_command cmd;
        int error;
        int retry;


        /*
         * If we change the OCR value, retry the command until the OCR
         * we receive in response has the "CARD BUSY" bit set, meaning
         * that all cards are ready for identification.
         */
        for (retry = 0; retry < 100; retry++) {
                memset(&cmd, 0, sizeof(cmd));
                cmd.c_arg = !ISSET(sc->caps, SMC_CAPS_SPI_MODE) ?
                    ocr : (ocr & MMC_OCR_HCS);
                cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R3 | SCF_RSP_SPI_R1;

                if (ISSET(sc->flags, SMF_SD_MODE)) {
                        cmd.c_opcode = SD_APP_OP_COND;
                        error = sdmmc_app_command(sc, 0, &cmd);
                } else {
                        cmd.c_opcode = MMC_SEND_OP_COND;
                        error = sdmmc_mmc_command(sc, &cmd);
                }
                if (error)
                        break;

                if (ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
                        if (!ISSET(MMC_SPI_R1(cmd.c_resp), R1_SPI_IDLE))
                                break;
                } else {
                        if (ISSET(MMC_R3(cmd.c_resp), MMC_OCR_MEM_READY) ||
                            ocr == 0)
                                break;
                }

                error = ETIMEDOUT;
                sdmmc_delay(10000);
        }
        if (error == 0 &&
            ocrp != NULL &&
            !ISSET(sc->caps, SMC_CAPS_SPI_MODE))
                *ocrp = MMC_R3(cmd.c_resp);
        DPRINTF(("sdmmc_mem_send_op_cond: error=%d, ocr=%x\n",
                 error, MMC_R3(cmd.c_resp)));
        return error;
}

/*
 * Set the lowest bus voltage supported by the card and the host.
 */
int
sdmmc_set_bus_power(struct sdmmc_softc *sc, uint32_t host_ocr,
                    uint32_t card_ocr)
{
        uint32_t bit;

        /* Mask off unsupported voltage levels and select the lowest. */
        DPRINTF(("host_ocr=%x ", host_ocr));
        host_ocr &= card_ocr;
        for (bit = 4; bit < 23; bit++) {
                if (ISSET(host_ocr, (1 << bit))) {
                        host_ocr &= (3 << bit);
                        break;
                }
        }
        DPRINTF(("card_ocr=%x new_ocr=%x\n", card_ocr, host_ocr));

        if (host_ocr == 0 ||
            sc->sdifdv->bus_power(sc->sdifdv->priv, host_ocr) != 0)
                return 1;
        return 0;
}

int
sdmmc_app_command(struct sdmmc_softc *sc, uint16_t rca,
                  struct sdmmc_command *cmd)
{
        struct sdmmc_command acmd;
        int error;

        memset(&acmd, 0, sizeof(acmd));
        acmd.c_opcode = MMC_APP_CMD;
        if (rca != 0) {
                acmd.c_arg = rca << 16;
                acmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1;
        } else {
                acmd.c_arg = 0;
                acmd.c_flags = SCF_CMD_BCR | SCF_RSP_R1 | SCF_RSP_SPI_R1;
        }

        error = sdmmc_mmc_command(sc, &acmd);
        if (error == 0) {
                if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE) &&
                    !ISSET(MMC_R1(acmd.c_resp), MMC_R1_APP_CMD)) {
                        /* Card does not support application commands. */
                        error = ENODEV;
                } else {
                        error = sdmmc_mmc_command(sc, cmd);
                }
        }
        DPRINTF(("sdmmc_app_command: done (error=%d)\n", error));
        return error;
}

void
sdmmc_dump_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd)
{
        int i;

        printf("cmd %u arg=%x data=%p dlen=%d flags=%x (error %d)\n",
            cmd->c_opcode, cmd->c_arg, cmd->c_data,
            cmd->c_datalen, cmd->c_flags, cmd->c_error);

        if (cmd->c_error )
                return;

        printf("resp=");
        if (ISSET(cmd->c_flags, SCF_RSP_136))
                for (i = 0; i < sizeof cmd->c_resp; i++)
                        printf("%02x ", ((uint8_t *)cmd->c_resp)[i]);
        else if (ISSET(cmd->c_flags, SCF_RSP_PRESENT))
                for (i = 0; i < 4; i++)
                        printf("%02x ", ((uint8_t *)cmd->c_resp)[i]);
        else
                printf("none");
        printf("\n");
}

int
sdmmc_mmc_command(struct sdmmc_softc *sc, struct sdmmc_command *cmd)
{
        int error;

        DPRINTF(("sdmmc_mmc_command: cmd=%d, arg=%x, flags=%x\n",
                 cmd->c_opcode, cmd->c_arg, cmd->c_flags));

#if 0
#if defined(DIAGNOSTIC) || defined(SDMMC_DEBUG)
        if (cmd->c_data && !ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
                if (sc->sc_card == NULL)
                        panic("%s: deselected card\n", DEVNAME(sc));
        }
#endif
#endif

        sc->sdifdv->exec_cmd(sc->sdifdv->priv, cmd);

#ifdef SDMMC_DEBUG

        sdmmc_dump_command(sc, cmd);

#endif

        error = cmd->c_error;

        DPRINTF(("sdmmc_mmc_command: error=%d\n", error));

        return error;
}

/*
 * Scan for I/O functions and memory cards on the bus, allocating a
 * sdmmc_function structure for each.
 */
int
sdmmc_scan(struct sdmmc_softc *sc)
{

#if 0 /* SPI NOT SUPPORTED */
        if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
                /* Scan for I/O functions. */
                if (ISSET(sc->sc_flags, SMF_IO_MODE))
                        sdmmc_io_scan(sc);
        }
#endif

        /* Scan for memory cards on the bus. */
        if (ISSET(sc->flags, SMF_MEM_MODE))
                sdmmc_mem_scan(sc);

        DPRINTF(("Bus clock speed: %d\n", sc->busclk));
        return sc->sdifdv->bus_clock(sc->sdifdv->priv, sc->busclk);
}

/*
 * Read the CSD and CID from all cards and assign each card a unique
 * relative card address (RCA).  CMD2 is ignored by SDIO-only cards.
 */
void
sdmmc_mem_scan(struct sdmmc_softc *sc)
{
        sdmmc_response resp;
        //struct sdmmc_function *sf;
        //      uint16_t next_rca;
        int error;
        int retry;

        /*
         * CMD2 is a broadcast command understood by SD cards and MMC
         * cards.  All cards begin to respond to the command, but back
         * off if another card drives the CMD line to a different level.
         * Only one card will get its entire response through.  That
         * card remains silent once it has been assigned a RCA.
         */
        for (retry = 0; retry < 100; retry++) {
                error = sdmmc_mem_send_cid(sc, &resp);
                if (error) {
                        if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE) &&
                            error == ETIMEDOUT) {
                                /* No more cards there. */
                                break;
                        }
                        DPRINTF(("Couldn't read CID\n"));
                        break;
                }

                /* In MMC mode, find the next available RCA. */
                /*next_rca = 1;
                if (!ISSET(dv->flags, SMF_SD_MODE)) {
                        SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list)
                                next_rca++;
                                }*/

                /* Allocate a sdmmc_function structure. */
                /*sf = sdmmc_function_alloc(sc);
                  sf->rca = next_rca;*/

                /*
                 * Remember the CID returned in the CMD2 response for
                 * later decoding.
                 */
                memcpy(sc->raw_cid, resp, sizeof(sc->raw_cid));

                /*
                 * Silence the card by assigning it a unique RCA, or
                 * querying it for its RCA in the case of SD.
                 */
                if (!ISSET(sc->caps, SMC_CAPS_SPI_MODE)) {
                        if (sdmmc_set_relative_addr(sc) != 0) {
                                DPRINTF(("couldn't set mem RCA\n"));
                                break;
                        }
                }

                /*
                 * If this is a memory-only card, the card responding
                 * first becomes an alias for SDIO function 0.
                 */
                /*if (sc->sc_fn0 == NULL)
                        sc->sc_fn0 = sf;

                        SIMPLEQ_INSERT_TAIL(&sc->sf_head, sf, sf_list);*/

                /* only one function in SPI mode */
                /*if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE))
                  break;*/
        }

        /*
         * All cards are either inactive or awaiting further commands.
         * Read the CSDs and decode the raw CID for each card.
         */
        /*      SIMPLEQ_FOREACH(sf, &sc->sf_head, sf_list) {*/
        error = sdmmc_mem_send_csd(sc, &resp);
        if (error) {
                /*SET(sf->flags, SFF_ERROR);
                  continue;*/
        }

        if (sdmmc_decode_csd(sc, resp) != 0 ||
            sdmmc_decode_cid(sc, sc->raw_cid) != 0) {
                /*SET(sf->flags, SFF_ERROR);
                  continue;*/
        }

#ifdef SDMMC_DEBUG
        printf("CID: ");
        sdmmc_print_cid(&sc->cid);
#endif
                /*      }*/
}

/*
 * Retrieve (SD) or set (MMC) the relative card address (RCA).
 */
int
sdmmc_set_relative_addr(struct sdmmc_softc *sc)
{
        struct sdmmc_command cmd;
        int error;

        /* Don't lock */

        if (ISSET(sc->caps, SMC_CAPS_SPI_MODE))
                return EIO;

        memset(&cmd, 0, sizeof(cmd));
        if (ISSET(sc->flags, SMF_SD_MODE)) {
                cmd.c_opcode = SD_SEND_RELATIVE_ADDR;
                cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R6;
        } else {
                cmd.c_opcode = MMC_SET_RELATIVE_ADDR;
                cmd.c_arg = MMC_ARG_RCA(sc->rca);
                cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1;
        }
        error = sdmmc_mmc_command(sc, &cmd);
        if (error)
                return error;

        if (ISSET(sc->flags, SMF_SD_MODE))
                sc->rca = SD_R6_RCA(cmd.c_resp);

        return 0;
}

int
sdmmc_mem_send_cid(struct sdmmc_softc *sc, sdmmc_response *resp)
{
        struct sdmmc_command cmd;
        int error;


        memset(&cmd, 0, sizeof cmd);
        cmd.c_opcode = MMC_ALL_SEND_CID;
        cmd.c_flags = SCF_CMD_BCR | SCF_RSP_R2;

        error = sdmmc_mmc_command(sc, &cmd);

#ifdef SDMMC_DEBUG
        sdmmc_dump_data("CID", cmd.c_resp, sizeof(cmd.c_resp));
#endif
        if (error == 0 && resp != NULL)
                memcpy(resp, &cmd.c_resp, sizeof(*resp));
        return error;
}

void
sdmmc_dump_data(const char *title, void *ptr, size_t size)
{
        char buf[16];
        uint8_t *p = ptr;
        int i, j;

        printf("sdmmc_dump_data: %s\n", title ? title : "");
        printf("--------+--------------------------------------------------+------------------+\n");
        printf("offset  | +0 +1 +2 +3 +4 +5 +6 +7  +8 +9 +a +b +c +d +e +f | data             |\n");
        printf("--------+--------------------------------------------------+------------------+\n");
        for (i = 0; i < (int)size; i++) {
                if ((i % 16) == 0) {
                        printf("%08x| ", i);
                } else if ((i % 16) == 8) {
                        printf(" ");
                }

                printf("%02x ", p[i]);
                buf[i % 16] = p[i];

                if ((i % 16) == 15) {
                        printf("| ");
                        for (j = 0; j < 16; j++) {
                                if (buf[j] >= 0x20 && buf[j] <= 0x7e) {
                                        printf("%c", buf[j]);
                                } else {
                                        printf(".");
                                }
                        }
                        printf(" |\n");
                }
        }
        if ((i % 16) != 0) {
                j = (i % 16);
                for (; j < 16; j++) {
                        printf("   ");
                        if ((j % 16) == 8) {
                                printf(" ");
                        }
                }

                printf("| ");
                for (j = 0; j < (i % 16); j++) {
                        if (buf[j] >= 0x20 && buf[j] <= 0x7e) {
                                printf("%c", buf[j]);
                        } else {
                                printf(".");
                        }
                }
                for (; j < 16; j++) {
                        printf(" ");
                }
                printf(" |\n");
        }
        printf("--------+--------------------------------------------------+------------------+\n");
}

int
sdmmc_mem_send_csd(struct sdmmc_softc *sc, sdmmc_response *resp)
{
        struct sdmmc_command cmd;
        int error;

        memset(&cmd, 0, sizeof cmd);
        cmd.c_opcode = MMC_SEND_CSD;
        cmd.c_arg = MMC_ARG_RCA(sc->rca);
        cmd.c_flags = SCF_CMD_AC | SCF_RSP_R2;

        error = sdmmc_mmc_command(sc, &cmd);

#ifdef SDMMC_DEBUG
        sdmmc_dump_data("CSD", cmd.c_resp, sizeof(cmd.c_resp));
#endif
        if (error == 0 && resp != NULL)
                memcpy(resp, &cmd.c_resp, sizeof(*resp));
        return error;
}

int
sdmmc_decode_csd(struct sdmmc_softc *sc, sdmmc_response resp)
{
        /* TRAN_SPEED(2:0): transfer rate exponent */
        static const int speed_exponent[8] = {
                100 *    1,     /* 100 Kbits/s */
                  1 * 1000,     /*   1 Mbits/s */
                 10 * 1000,     /*  10 Mbits/s */
                100 * 1000,     /* 100 Mbits/s */
                         0,
                         0,
                         0,
                         0,
        };
        /* TRAN_SPEED(6:3): time mantissa */
        static const int speed_mantissa[16] = {
                0, 10, 12, 13, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 70, 80,
        };
        struct sdmmc_csd *csd = &sc->csd;
        int e, m;

        if (ISSET(sc->flags, SMF_SD_MODE)) {
                /*
                 * CSD version 1.0 corresponds to SD system
                 * specification version 1.0 - 1.10. (SanDisk, 3.5.3)
                 */
                csd->csdver = SD_CSD_CSDVER(resp);
                switch (csd->csdver) {
                case SD_CSD_CSDVER_2_0:
                        DPRINTF(("SD Ver.2.0\n"));
                        SET(sc->flags, SMF_CARD_SDHC);
                        csd->capacity = SD_CSD_V2_CAPACITY(resp);
                        csd->read_bl_len = SD_CSD_V2_BL_LEN;
                        csd->ccc = SD_CSD_CCC(resp);
                        break;

                case SD_CSD_CSDVER_1_0:
                        DPRINTF(("SD Ver.1.0\n"));
                        csd->capacity = SD_CSD_CAPACITY(resp);
                        csd->read_bl_len = SD_CSD_READ_BL_LEN(resp);
                        break;

                default:
                        printf("unknown SD CSD structure version 0x%x\n",
                            csd->csdver);
                        return 1;
                }

                csd->mmcver = SD_CSD_MMCVER(resp);
                csd->write_bl_len = SD_CSD_WRITE_BL_LEN(resp);
                csd->r2w_factor = SD_CSD_R2W_FACTOR(resp);
                e = SD_CSD_SPEED_EXP(resp);
                m = SD_CSD_SPEED_MANT(resp);
                csd->tran_speed = speed_exponent[e] * speed_mantissa[m] / 10;
        } else {
                csd->csdver = MMC_CSD_CSDVER(resp);
                if (csd->csdver == MMC_CSD_CSDVER_1_0 ) {
                        printf("unknown MMC CSD structure version 0x%x\n",
                            csd->csdver);
                        return 1;
                }

                csd->mmcver = MMC_CSD_MMCVER(resp);
                csd->capacity = MMC_CSD_CAPACITY(resp);
                csd->read_bl_len = MMC_CSD_READ_BL_LEN(resp);
                csd->write_bl_len = MMC_CSD_WRITE_BL_LEN(resp);
                csd->r2w_factor = MMC_CSD_R2W_FACTOR(resp);
                e = MMC_CSD_TRAN_SPEED_EXP(resp);
                m = MMC_CSD_TRAN_SPEED_MANT(resp);
                csd->tran_speed = speed_exponent[e] * speed_mantissa[m] / 10;
        }
        if ((1 << csd->read_bl_len) > SDMMC_SECTOR_SIZE)
                csd->capacity *= (1 << csd->read_bl_len) / SDMMC_SECTOR_SIZE;


        if (sc->busclk > csd->tran_speed)
                sc->busclk = csd->tran_speed;

#ifdef SDMMC_DUMP_CSD
        sdmmc_print_csd(resp, csd);
#endif

        return 0;
}

int
sdmmc_decode_cid(struct sdmmc_softc *sc, sdmmc_response resp)
{
        struct sdmmc_cid *cid = &sc->cid;

        if (ISSET(sc->flags, SMF_SD_MODE)) {
                cid->mid = SD_CID_MID(resp);
                cid->oid = SD_CID_OID(resp);
                SD_CID_PNM_CPY(resp, cid->pnm);
                cid->rev = SD_CID_REV(resp);
                cid->psn = SD_CID_PSN(resp);
                cid->mdt = SD_CID_MDT(resp);
        } else {
                switch(sc->csd.mmcver) {
                case MMC_CSD_MMCVER_1_0:
                case MMC_CSD_MMCVER_1_4:
                        cid->mid = MMC_CID_MID_V1(resp);
                        MMC_CID_PNM_V1_CPY(resp, cid->pnm);
                        cid->rev = MMC_CID_REV_V1(resp);
                        cid->psn = MMC_CID_PSN_V1(resp);
                        cid->mdt = MMC_CID_MDT_V1(resp);
                        break;
                case MMC_CSD_MMCVER_2_0:
                case MMC_CSD_MMCVER_3_1:
                case MMC_CSD_MMCVER_4_0:
                        cid->mid = MMC_CID_MID_V2(resp);
                        cid->oid = MMC_CID_OID_V2(resp);
                        MMC_CID_PNM_V2_CPY(resp, cid->pnm);
                        cid->psn = MMC_CID_PSN_V2(resp);
                        break;
                default:
                        printf("unknown MMC version %d\n",
                            sc->csd.mmcver);
                        return 1;
                }
        }
        return 0;
}

void
sdmmc_print_cid(struct sdmmc_cid *cid)
{

        printf("mid=0x%02x oid=0x%04x pnm=\"%s\" rev=0x%02x psn=0x%08x"
            " mdt=%03x\n", cid->mid, cid->oid, cid->pnm, cid->rev, cid->psn,
            cid->mdt);
}

int
sdmmc_mem_read_block(struct sdmmc_softc *sc, uint32_t blkno,
    u_char *data, size_t datalen)
{
        struct sdmmc_command cmd;
        int error;

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_data = data;
        cmd.c_datalen = datalen;
        cmd.c_blklen = SDMMC_SECTOR_SIZE;
        cmd.c_opcode = (cmd.c_datalen / cmd.c_blklen) > 1 ?
            MMC_READ_BLOCK_MULTIPLE : MMC_READ_BLOCK_SINGLE;
        cmd.c_arg = blkno;
        if (!ISSET(sc->flags, SMF_CARD_SDHC))
          cmd.c_arg <<= SDMMC_SECTOR_SIZE_SB;
        DPRINTF(("Reading block %d (%d)\n", blkno, cmd.c_arg));
        cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;

        error = sdmmc_mmc_command(sc, &cmd);
        if (error)
                goto out;

        if (!ISSET(sc->caps, SMC_CAPS_AUTO_STOP)) {
                if (cmd.c_opcode == MMC_READ_BLOCK_MULTIPLE) {
                        memset(&cmd, 0, sizeof cmd);
                        cmd.c_opcode = MMC_STOP_TRANSMISSION;
                        cmd.c_arg = MMC_ARG_RCA(sc->rca);
                        cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1B | SCF_RSP_SPI_R1B;
                        error = sdmmc_mmc_command(sc, &cmd);
                        if (error)
                                goto out;
                }
        }

        /*if (!ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE)) {*/
        do {
                memset(&cmd, 0, sizeof(cmd));
                cmd.c_opcode = MMC_SEND_STATUS;
                cmd.c_arg = MMC_ARG_RCA(sc->rca);
                cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R2;
                error = sdmmc_mmc_command(sc, &cmd);
                if (error)
                        break;
                /* XXX time out */
        } while (!ISSET(MMC_R1(cmd.c_resp), MMC_R1_READY_FOR_DATA));
                /*}*/

out:
        return error;
}

int
sdmmc_select_card(struct sdmmc_softc *sc)
{
        struct sdmmc_command cmd;
        int error;

        /* Don't lock */

        /*      if (ISSET(sc->sc_caps, SMC_CAPS_SPI_MODE))
                return EIO;*/

        /*if (sc->sc_card == sf
         || (sf && sc->sc_card && sc->sc_card->rca == sf->rca)) {
                sc->sc_card = sf;
                return 0;
                }*/

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_opcode = MMC_SELECT_CARD;
        cmd.c_arg = (sc == NULL) ? 0 : MMC_ARG_RCA(sc->rca);
        cmd.c_flags = SCF_CMD_AC | ((sc == NULL) ? SCF_RSP_R0 : SCF_RSP_R1);
        error = sdmmc_mmc_command(sc, &cmd);
        /*if (error == 0 || sf == NULL)
          sc->sc_card = sf;*/

        return error;
}

/*
 * Set the read block length appropriately for this card, according to
 * the card CSD register value.
 */
int
sdmmc_mem_set_blocklen(struct sdmmc_softc *sc)
{
        struct sdmmc_command cmd;
        int error;

        /* Don't lock */

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_opcode = MMC_SET_BLOCKLEN;
        cmd.c_arg = SDMMC_SECTOR_SIZE;
        cmd.c_flags = SCF_CMD_AC | SCF_RSP_R1 | SCF_RSP_SPI_R1;

        error = sdmmc_mmc_command(sc, &cmd);

        DPRINTF(("sdmmc_mem_set_blocklen: read_bl_len=%d sector_size=%d\n",
                 1 << sc->csd.read_bl_len, SDMMC_SECTOR_SIZE));

        return error;
}

int
sdmmc_mem_send_scr(struct sdmmc_softc *sc, uint32_t scr[2])
{
        struct sdmmc_command cmd;
        void *ptr = NULL;
        int datalen = 8;
        int error = 0;

        ptr = alloc(datalen); //malloc(datalen, M_DEVBUF, M_NOWAIT | M_ZERO);
        if (ptr == NULL)
                goto out;

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_data = ptr;
        cmd.c_datalen = datalen;
        cmd.c_blklen = datalen;
        cmd.c_arg = 0;
        cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;
        cmd.c_opcode = SD_APP_SEND_SCR;

        error = sdmmc_app_command(sc, sc->rca, &cmd);
        if (error == 0) {
                memcpy(scr, ptr, datalen);
        }

out:
        if (ptr != NULL) {
                dealloc(ptr, datalen);
        }
        DPRINTF(("sdmem_mem_send_scr: error = %d\n",
            error));
        if (error)
                return error;
#ifdef SDMMC_DEBUG
        sdmmc_dump_data("SCR", scr, 8);
#endif
        return error;
}

int
sdmmc_mem_decode_scr(struct sdmmc_softc *sc)
{
        sdmmc_response resp;
        int ver;

        memset(resp, 0, sizeof(resp));
        /*resp[0] = sc->raw_scr[1];
        resp[1] = sc->raw_scr[0];*/
        /*
         * Change the raw-scr received from the DMA stream to resp.
         */
        resp[0] = be32toh(sc->raw_scr[1]) >> 8;         // LSW
        resp[1] = be32toh(sc->raw_scr[0]);              // MSW
        resp[0] |= (resp[1] & 0xff) << 24;
        resp[1] >>= 8;
        resp[0] = htole32(resp[0]);
        resp[1] = htole32(resp[1]);

        ver = SCR_STRUCTURE(resp);
        sc->scr.sd_spec = SCR_SD_SPEC(resp);
        sc->scr.bus_width = SCR_SD_BUS_WIDTHS(resp);

        DPRINTF(("sdmmc_mem_decode_scr: spec=%d, bus width=%d\n",
            sc->scr.sd_spec, sc->scr.bus_width));

        if (ver != 0) {
                DPRINTF(("unknown structure version: %d\n",
                    ver));
                return EINVAL;
        }
        return 0;
}

int
sdmmc_set_bus_width(struct sdmmc_softc *sc, int width)
{
        struct sdmmc_command cmd;
        int error;

        if (ISSET(sc->caps, SMC_CAPS_SPI_MODE))
                return ENODEV;

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_opcode = SD_APP_SET_BUS_WIDTH;
        cmd.c_flags = SCF_RSP_R1 | SCF_CMD_AC;

        switch (width) {
        case 1:
                cmd.c_arg = SD_ARG_BUS_WIDTH_1;
                break;

        case 4:
                cmd.c_arg = SD_ARG_BUS_WIDTH_4;
                break;

        default:
                return EINVAL;
        }

        error = sdmmc_app_command(sc, sc->rca, &cmd);
        if (error == 0)
                error = sc->sdifdv->bus_width(sc->sdifdv->priv, width);
        return error;
}

#if 1
static int
sdmmc_mem_sd_switch(struct sdmmc_softc *sc, int mode, int group,
    int function, void *status)
{
        struct sdmmc_command cmd;
        void *ptr = NULL;
        int gsft, error = 0;
        const int statlen = 64;

        if (sc->scr.sd_spec >= SCR_SD_SPEC_VER_1_10 &&
            !ISSET(sc->csd.ccc, SD_CSD_CCC_SWITCH))
                return EINVAL;

        if (group <= 0 || group > 6 ||
            function < 0 || function > 16)
                return EINVAL;

        gsft = (group - 1) << 2;

        ptr = alloc(statlen);
        if (ptr == NULL)
                goto out;

        memset(&cmd, 0, sizeof(cmd));
        cmd.c_data = ptr;
        cmd.c_datalen = statlen;
        cmd.c_blklen = statlen;
        cmd.c_opcode = SD_SEND_SWITCH_FUNC;
        cmd.c_arg =
            (!!mode << 31) | (function << gsft) | (0x00ffffff & ~(0xf << gsft));
        cmd.c_flags = SCF_CMD_ADTC | SCF_CMD_READ | SCF_RSP_R1 | SCF_RSP_SPI_R1;

        error = sdmmc_mmc_command(sc, &cmd);
        if (error == 0) {
                memcpy(status, ptr, statlen);
        }

out:
        if (ptr != NULL) {
                dealloc(ptr, statlen);
        }
        return error;
}
#endif