mmc_xpt.c

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/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2013,2014 Ilya Bakulin <ilya@bakulin.de>
 * 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,
 *    without modification, immediately at the beginning of the file.
 * 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>
__FBSDID("$FreeBSD$");
 
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/interrupt.h>
#include <sys/sbuf.h>
 
#include <sys/lock.h>
#include <sys/mutex.h>
#include <sys/sysctl.h>
#include <sys/condvar.h>
 
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <cam/cam_queue.h>
#include <cam/cam_periph.h>
#include <cam/cam_sim.h>
#include <cam/cam_xpt.h>
#include <cam/cam_xpt_sim.h>
#include <cam/cam_xpt_periph.h>
#include <cam/cam_xpt_internal.h>
#include <cam/cam_debug.h>
 
#include <cam/mmc/mmc.h>
#include <cam/mmc/mmc_bus.h>
 
#include <machine/stdarg.h>     /* for xpt_print below */
#include <machine/_inttypes.h>  /* for PRIu64 */
#include "opt_cam.h"
 
FEATURE(mmccam, "CAM-based MMC/SD/SDIO stack");
 
static struct cam_ed * mmc_alloc_device(struct cam_eb *bus,
    struct cam_et *target, lun_id_t lun_id);
static void mmc_dev_async(u_int32_t async_code, struct cam_eb *bus,
    struct cam_et *target, struct cam_ed *device, void *async_arg);
static void      mmc_action(union ccb *start_ccb);
static void      mmc_dev_advinfo(union ccb *start_ccb);
static void      mmc_announce_periph(struct cam_periph *periph);
static void      mmc_scan_lun(struct cam_periph *periph,
    struct cam_path *path, cam_flags flags, union ccb *ccb);
 
/* mmcprobe methods */
static cam_status mmcprobe_register(struct cam_periph *periph, void *arg);
static void      mmcprobe_start(struct cam_periph *periph, union ccb *start_ccb);
static void      mmcprobe_cleanup(struct cam_periph *periph);
static void      mmcprobe_done(struct cam_periph *periph, union ccb *done_ccb);
 
static void mmc_proto_announce(struct cam_ed *device);
static void mmc_proto_denounce(struct cam_ed *device);
static void mmc_proto_debug_out(union ccb *ccb);
 
typedef enum {
        PROBE_RESET,
        PROBE_IDENTIFY,
        PROBE_POWER_OFF,
        PROBE_GET_HOST_OCR,
        PROBE_RESET_BUS,
        PROBE_SET_ID_FREQ,
        PROBE_SET_CS,
        PROBE_GO_IDLE_STATE,
        PROBE_SDIO_RESET,
        PROBE_SEND_IF_COND,
        PROBE_SDIO_INIT,
        PROBE_MMC_INIT,
        PROBE_SEND_APP_OP_COND,
        PROBE_GET_CID,
        PROBE_GET_CSD,
        PROBE_SEND_RELATIVE_ADDR,
        PROBE_MMC_SET_RELATIVE_ADDR,
        PROBE_SELECT_CARD,
        PROBE_DONE,
        PROBE_INVALID
} probe_action;
 
static char *probe_action_text[] = {
        "PROBE_RESET",
        "PROBE_IDENTIFY",
        "PROBE_POWER_OFF",
        "PROBE_GET_HOST_OCR",
        "PROBE_RESET_BUS",
        "PROBE_SET_ID_FREQ",
        "PROBE_SET_CS",
        "PROBE_GO_IDLE_STATE",
        "PROBE_SDIO_RESET",
        "PROBE_SEND_IF_COND",
        "PROBE_SDIO_INIT",
        "PROBE_MMC_INIT",
        "PROBE_SEND_APP_OP_COND",
        "PROBE_GET_CID",
        "PROBE_GET_CSD",
        "PROBE_SEND_RELATIVE_ADDR",
        "PROBE_MMC_SET_RELATIVE_ADDR",
        "PROBE_SELECT_CARD",
        "PROBE_DONE",
        "PROBE_INVALID"
};
 
#define PROBE_SET_ACTION(softc, newaction)      \
do {                                                                    \
        char **text;                                                    \
        text = probe_action_text;                                       \
        CAM_DEBUG((softc)->periph->path, CAM_DEBUG_PROBE,               \
            ("Probe %s to %s\n", text[(softc)->action],                 \
            text[(newaction)]));                                        \
        (softc)->action = (newaction);                                  \
} while(0)
 
static struct xpt_xport_ops mmc_xport_ops = {
        .alloc_device = mmc_alloc_device,
        .action = mmc_action,
        .async = mmc_dev_async,
        .announce = mmc_announce_periph,
};
 
#define MMC_XPT_XPORT(x, X)                             \
        static struct xpt_xport mmc_xport_ ## x = {     \
                .xport = XPORT_ ## X,                   \
                .name = #x,                             \
                .ops = &mmc_xport_ops,                  \
        };                                              \
        CAM_XPT_XPORT(mmc_xport_ ## x);
 
MMC_XPT_XPORT(mmc, MMCSD);
 
static struct xpt_proto_ops mmc_proto_ops = {
        .announce = mmc_proto_announce,
        .denounce = mmc_proto_denounce,
        .debug_out = mmc_proto_debug_out,
};
 
static struct xpt_proto mmc_proto = {
        .proto = PROTO_MMCSD,
        .name = "mmcsd",
        .ops = &mmc_proto_ops,
};
CAM_XPT_PROTO(mmc_proto);
 
typedef struct {
        probe_action    action;
        int             restart;
        uint32_t        host_ocr;
        uint32_t        flags;
#define PROBE_FLAG_ACMD_SENT    0x1 /* CMD55 is sent, card expects ACMD */
#define PROBE_FLAG_HOST_CAN_DO_18V   0x2 /* Host can do 1.8V signaling */
        uint8_t         acmd41_count; /* how many times ACMD41 has been issued */
        struct cam_periph *periph;
} mmcprobe_softc;
 
/* XPort functions -- an interface to CAM at periph side */
 
static struct cam_ed *
mmc_alloc_device(struct cam_eb *bus, struct cam_et *target, lun_id_t lun_id)
{
        struct cam_ed *device;
 
        device = xpt_alloc_device(bus, target, lun_id);
        if (device == NULL)
                return (NULL);
 
        device->quirk = NULL;
        device->mintags = 0;
        device->maxtags = 0;
        bzero(&device->inq_data, sizeof(device->inq_data));
        device->inq_flags = 0;
        device->queue_flags = 0;
        device->serial_num = NULL;
        device->serial_num_len = 0;
        return (device);
}
 
static void
mmc_dev_async(u_int32_t async_code, struct cam_eb *bus, struct cam_et *target,
              struct cam_ed *device, void *async_arg)
{
 
        /*
         * We only need to handle events for real devices.
         */
        if (target->target_id == CAM_TARGET_WILDCARD
            || device->lun_id == CAM_LUN_WILDCARD)
                return;
 
        if (async_code == AC_LOST_DEVICE &&
            (device->flags & CAM_DEV_UNCONFIGURED) == 0) {
                device->flags |= CAM_DEV_UNCONFIGURED;
                xpt_release_device(device);
        }
}
 
/* Taken from nvme_scan_lun, thanks to bsdimp@ */
static void
mmc_scan_lun(struct cam_periph *periph, struct cam_path *path,
             cam_flags flags, union ccb *request_ccb)
{
        struct ccb_pathinq cpi;
        cam_status status;
        struct cam_periph *old_periph;
        int lock;
 
        CAM_DEBUG(path, CAM_DEBUG_TRACE, ("mmc_scan_lun\n"));
 
        xpt_path_inq(&cpi, path);
 
        if (cpi.ccb_h.status != CAM_REQ_CMP) {
                if (request_ccb != NULL) {
                        request_ccb->ccb_h.status = cpi.ccb_h.status;
                        xpt_done(request_ccb);
                }
                return;
        }
 
        if (xpt_path_lun_id(path) == CAM_LUN_WILDCARD) {
                CAM_DEBUG(path, CAM_DEBUG_TRACE, ("mmd_scan_lun ignoring bus\n"));
                request_ccb->ccb_h.status = CAM_REQ_CMP;        /* XXX signal error ? */
                xpt_done(request_ccb);
                return;
        }
 
        lock = (xpt_path_owned(path) == 0);
        if (lock)
                xpt_path_lock(path);
 
        if ((old_periph = cam_periph_find(path, "mmcprobe")) != NULL) {
                if ((old_periph->flags & CAM_PERIPH_INVALID) == 0) {
//                      mmcprobe_softc *softc;
//                      softc = (mmcprobe_softc *)old_periph->softc;
//                      Not sure if we need request ccb queue for mmc
//                      TAILQ_INSERT_TAIL(&softc->request_ccbs,
//                              &request_ccb->ccb_h, periph_links.tqe);
//                      softc->restart = 1;
                        CAM_DEBUG(path, CAM_DEBUG_INFO,
                                  ("Got scan request, but mmcprobe already exists\n"));
                        request_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
                        xpt_done(request_ccb);
                } else {
                        request_ccb->ccb_h.status = CAM_REQ_CMP_ERR;
                        xpt_done(request_ccb);
                }
        } else {
                CAM_DEBUG(path, CAM_DEBUG_INFO,
                    (" Set up the mmcprobe device...\n"));
 
                status = cam_periph_alloc(mmcprobe_register, NULL,
                                          mmcprobe_cleanup,
                                          mmcprobe_start,
                                          "mmcprobe",
                                          CAM_PERIPH_BIO,
                                          path, NULL, 0,
                                          request_ccb);
                if (status != CAM_REQ_CMP) {
                        xpt_print(path, "xpt_scan_lun: cam_alloc_periph "
                                  "returned an error, can't continue probe\n");
                }
                request_ccb->ccb_h.status = status;
                xpt_done(request_ccb);
        }
 
        if (lock)
                xpt_path_unlock(path);
}
 
static void
mmc_action(union ccb *start_ccb)
{
        CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
                  ("mmc_action! func_code=%x, action %s\n", start_ccb->ccb_h.func_code,
                   xpt_action_name(start_ccb->ccb_h.func_code)));
        switch (start_ccb->ccb_h.func_code) {
        case XPT_SCAN_BUS:
                /* FALLTHROUGH */
        case XPT_SCAN_TGT:
                /* FALLTHROUGH */
        case XPT_SCAN_LUN:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_INFO,
                          ("XPT_SCAN_{BUS,TGT,LUN}\n"));
                mmc_scan_lun(start_ccb->ccb_h.path->periph,
                             start_ccb->ccb_h.path, start_ccb->crcn.flags,
                             start_ccb);
                break;
 
        case XPT_DEV_ADVINFO:
        {
                mmc_dev_advinfo(start_ccb);
                break;
        }
 
        default:
                xpt_action_default(start_ccb);
                break;
        }
}
 
static void
mmc_dev_advinfo(union ccb *start_ccb)
{
        struct cam_ed *device;
        struct ccb_dev_advinfo *cdai;
        off_t amt;
 
        xpt_path_assert(start_ccb->ccb_h.path, MA_OWNED);
        start_ccb->ccb_h.status = CAM_REQ_INVALID;
        device = start_ccb->ccb_h.path->device;
        cdai = &start_ccb->cdai;
        CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_TRACE,
                  ("%s: request %x\n", __func__, cdai->buftype));
 
        /* We don't support writing any data */
        if (cdai->flags & CDAI_FLAG_STORE)
                panic("Attempt to store data?!");
 
        switch(cdai->buftype) {
        case CDAI_TYPE_SCSI_DEVID:
                cdai->provsiz = device->device_id_len;
                if (device->device_id_len == 0)
                        break;
                amt = MIN(cdai->provsiz, cdai->bufsiz);
                memcpy(cdai->buf, device->device_id, amt);
                break;
        case CDAI_TYPE_SERIAL_NUM:
                cdai->provsiz = device->serial_num_len;
                if (device->serial_num_len == 0)
                        break;
                amt = MIN(cdai->provsiz, cdai->bufsiz);
                memcpy(cdai->buf, device->serial_num, amt);
                break;
        case CDAI_TYPE_PHYS_PATH: /* pass(4) wants this */
                cdai->provsiz = 0;
                break;
        case CDAI_TYPE_MMC_PARAMS:
                cdai->provsiz = sizeof(struct mmc_params);
                amt = MIN(cdai->provsiz, cdai->bufsiz);
                memcpy(cdai->buf, &device->mmc_ident_data, amt);
                break;
        default:
                panic("Unknown buftype");
                return;
        }
        start_ccb->ccb_h.status = CAM_REQ_CMP;
}
 
static void
mmc_announce_periph(struct cam_periph *periph)
{
        struct  ccb_pathinq cpi;
        struct  ccb_trans_settings cts;
        struct  cam_path *path = periph->path;
 
        cam_periph_assert(periph, MA_OWNED);
 
        CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("mmc_announce_periph"));
 
        memset(&cts, 0, sizeof(cts));
        xpt_setup_ccb(&cts.ccb_h, path, CAM_PRIORITY_NORMAL);
        cts.ccb_h.func_code = XPT_GET_TRAN_SETTINGS;
        cts.type = CTS_TYPE_CURRENT_SETTINGS;
        xpt_action((union ccb*)&cts);
        if ((cts.ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP)
                return;
        xpt_path_inq(&cpi, periph->path);
        CAM_DEBUG(path, CAM_DEBUG_INFO,
            ("XPT info: CLK %04d, ...\n", cts.proto_specific.mmc.ios.clock));
}
 
void
mmccam_start_discovery(struct cam_sim *sim)
{
        union ccb *ccb;
        uint32_t pathid;
 
        pathid = cam_sim_path(sim);
        ccb = xpt_alloc_ccb();
 
        /*
         * We create a rescan request for BUS:0:0, since the card
         * will be at lun 0.
         */
        if (xpt_create_path(&ccb->ccb_h.path, NULL, pathid,
                /* target */ 0, /* lun */ 0) != CAM_REQ_CMP) {
                xpt_free_ccb(ccb);
                return;
        }
 
        KASSERT(xpt_path_sim_device(ccb->ccb_h.path) != NULL,
            ("%s(%s): device is not initialized on sim's path",
            __func__, cam_sim_name(sim)));
        xpt_rescan(ccb);
}
 
/* This func is called per attached device :-( */
static void
mmc_print_ident(struct mmc_params *ident_data, struct sbuf *sb)
{
        bool space = false;
 
        sbuf_printf(sb, "Relative addr: %08x\n", ident_data->card_rca);
        sbuf_printf(sb, "Card features: <");
        if (ident_data->card_features & CARD_FEATURE_MMC) {
                sbuf_printf(sb, "MMC");
                space = true;
        }
        if (ident_data->card_features & CARD_FEATURE_MEMORY) {
                sbuf_printf(sb, "%sMemory", space ? " " : "");
                space = true;
        }
        if (ident_data->card_features & CARD_FEATURE_SDHC) {
                sbuf_printf(sb, "%sHigh-Capacity", space ? " " : "");
                space = true;
        }
        if (ident_data->card_features & CARD_FEATURE_SD20) {
                sbuf_printf(sb, "%sSD2.0-Conditions", space ? " " : "");
                space = true;
        }
        if (ident_data->card_features & CARD_FEATURE_SDIO) {
                sbuf_printf(sb, "%sSDIO", space ? " " : "");
                space = true;
        }
        if (ident_data->card_features & CARD_FEATURE_18V) {
                sbuf_printf(sb, "%s1.8-Signaling", space ? " " : "");
        }
        sbuf_printf(sb, ">\n");
 
        if (ident_data->card_features & CARD_FEATURE_MEMORY)
                sbuf_printf(sb, "Card memory OCR: %08x\n",
                    ident_data->card_ocr);
 
        if (ident_data->card_features & CARD_FEATURE_SDIO) {
                sbuf_printf(sb, "Card IO OCR: %08x\n", ident_data->io_ocr);
                sbuf_printf(sb, "Number of functions: %u\n",
                    ident_data->sdio_func_count);
        }
 
        sbuf_finish(sb);
        printf("%s", sbuf_data(sb));
        sbuf_clear(sb);
}
 
static void
mmc_proto_announce(struct cam_ed *device)
{
        struct sbuf     sb;
        char            buffer[256];
 
        sbuf_new(&sb, buffer, sizeof(buffer), SBUF_FIXEDLEN);
        mmc_print_ident(&device->mmc_ident_data, &sb);
        sbuf_finish(&sb);
        sbuf_putbuf(&sb);
}
 
static void
mmc_proto_denounce(struct cam_ed *device)
{
 
        mmc_proto_announce(device);
}
 
static void
mmc_proto_debug_out(union ccb *ccb)
{
        if (ccb->ccb_h.func_code != XPT_MMC_IO)
                return;
 
        CAM_DEBUG(ccb->ccb_h.path,
            CAM_DEBUG_CDB,("mmc_proto_debug_out\n"));
}
 
static periph_init_t probe_periph_init;
 
static struct periph_driver probe_driver =
{
        probe_periph_init, "mmcprobe",
        TAILQ_HEAD_INITIALIZER(probe_driver.units), /* generation */ 0,
        CAM_PERIPH_DRV_EARLY
};
 
PERIPHDRIVER_DECLARE(mmcprobe, probe_driver);
 
#define CARD_ID_FREQUENCY 400000 /* Spec requires 400kHz max during ID phase. */
 
static void
probe_periph_init(void)
{
}
 
static cam_status
mmcprobe_register(struct cam_periph *periph, void *arg)
{
        mmcprobe_softc *softc;
        union ccb *request_ccb; /* CCB representing the probe request */
        int status;
 
        CAM_DEBUG(periph->path, CAM_DEBUG_TRACE, ("mmcprobe_register\n"));
 
        request_ccb = (union ccb *)arg;
        if (request_ccb == NULL) {
                printf("mmcprobe_register: no probe CCB, "
                       "can't register device\n");
                return(CAM_REQ_CMP_ERR);
        }
 
        softc = (mmcprobe_softc *)malloc(sizeof(*softc), M_CAMXPT, M_NOWAIT);
 
        if (softc == NULL) {
                printf("proberegister: Unable to probe new device. "
                       "Unable to allocate softc\n");
                return(CAM_REQ_CMP_ERR);
        }
 
        softc->flags = 0;
        softc->acmd41_count = 0;
        periph->softc = softc;
        softc->periph = periph;
        softc->action = PROBE_INVALID;
        softc->restart = 0;
        status = cam_periph_acquire(periph);
 
        memset(&periph->path->device->mmc_ident_data, 0, sizeof(struct mmc_params));
        if (status != 0) {
                printf("proberegister: cam_periph_acquire failed (status=%d)\n",
                        status);
                return (CAM_REQ_CMP_ERR);
        }
        CAM_DEBUG(periph->path, CAM_DEBUG_PROBE, ("Probe started\n"));
 
        if (periph->path->device->flags & CAM_DEV_UNCONFIGURED)
                PROBE_SET_ACTION(softc, PROBE_RESET);
        else
                PROBE_SET_ACTION(softc, PROBE_IDENTIFY);
 
        /* This will kick the ball */
        xpt_schedule(periph, CAM_PRIORITY_XPT);
 
        return(CAM_REQ_CMP);
}
 
static int
mmc_highest_voltage(uint32_t ocr)
{
        int i;
 
        for (i = MMC_OCR_MAX_VOLTAGE_SHIFT;
            i >= MMC_OCR_MIN_VOLTAGE_SHIFT; i--)
                if (ocr & (1 << i))
                        return (i);
        return (-1);
}
 
static inline void
init_standard_ccb(union ccb *ccb, uint32_t cmd)
{
        ccb->ccb_h.func_code = cmd;
        ccb->ccb_h.flags = CAM_DIR_OUT;
        ccb->ccb_h.retry_count = 0;
        ccb->ccb_h.timeout = 15 * 1000;
        ccb->ccb_h.cbfcnp = mmcprobe_done;
}
 
static void
mmcprobe_start(struct cam_periph *periph, union ccb *start_ccb)
{
        mmcprobe_softc *softc;
        struct cam_path *path;
        struct ccb_mmcio *mmcio;
        struct ccb_trans_settings_mmc *cts;
 
        CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("mmcprobe_start\n"));
        softc = (mmcprobe_softc *)periph->softc;
        path = start_ccb->ccb_h.path;
        mmcio = &start_ccb->mmcio;
        cts = &start_ccb->cts.proto_specific.mmc;
        struct mmc_params *mmcp = &path->device->mmc_ident_data;
 
        memset(&mmcio->cmd, 0, sizeof(struct mmc_command));
 
        if (softc->restart) {
                softc->restart = 0;
                if (path->device->flags & CAM_DEV_UNCONFIGURED)
                        softc->action = PROBE_RESET;
                else
                        softc->action = PROBE_IDENTIFY;
        }
 
        /* Here is the place where the identify fun begins */
        switch (softc->action) {
        case PROBE_RESET:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("Start with PROBE_RESET\n"));
                /* FALLTHROUGH */
        case PROBE_IDENTIFY:
                xpt_path_inq(&start_ccb->cpi, periph->path);
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("Start with PROBE_IDENTIFY\n"));
                init_standard_ccb(start_ccb, XPT_MMC_GET_TRAN_SETTINGS);
                break;
 
        case PROBE_POWER_OFF:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("power off the card\n"));
                init_standard_ccb(start_ccb, XPT_MMC_SET_TRAN_SETTINGS);
                cts->ios.power_mode = power_off;
                cts->ios_valid = MMC_PM;
                break;
 
        case PROBE_GET_HOST_OCR:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("get the host ocr\n"));
                init_standard_ccb(start_ccb, XPT_MMC_GET_TRAN_SETTINGS);
                break;
 
        case PROBE_RESET_BUS:
        {
                uint32_t host_caps = cts->host_caps;
                if (host_caps & MMC_CAP_SIGNALING_180)
                        softc->flags |= PROBE_FLAG_HOST_CAN_DO_18V;
                uint32_t hv = mmc_highest_voltage(softc->host_ocr);
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("reseting the bus\n"));
                init_standard_ccb(start_ccb, XPT_MMC_SET_TRAN_SETTINGS);
                cts->ios.vdd = hv;
                cts->ios.bus_mode = opendrain;
                cts->ios.chip_select = cs_dontcare;
                cts->ios.power_mode = power_up;
                cts->ios.bus_width = bus_width_1;
                cts->ios.clock = 0;
                cts->ios_valid = MMC_VDD | MMC_PM | MMC_BM |
                        MMC_CS | MMC_BW | MMC_CLK;
                break;
        }
 
        case PROBE_SET_ID_FREQ:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("setting the ID freq\n"));
                init_standard_ccb(start_ccb, XPT_MMC_SET_TRAN_SETTINGS);
                cts->ios.power_mode = power_on;
                cts->ios.clock = CARD_ID_FREQUENCY;
                cts->ios.timing = bus_timing_normal;
                cts->ios_valid = MMC_PM | MMC_CLK | MMC_BT;
                break;
 
        case PROBE_SET_CS:
                /* Begin mmc_idle_cards() */
                init_standard_ccb(start_ccb, XPT_MMC_SET_TRAN_SETTINGS);
                cts->ios.chip_select = cs_high;
                cts->ios_valid = MMC_CS;
                break;
 
        case PROBE_GO_IDLE_STATE:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("Send first XPT_MMC_IO\n"));
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = MMC_GO_IDLE_STATE; /* CMD 0 */
                mmcio->cmd.arg = 0;
                mmcio->cmd.flags = MMC_RSP_NONE | MMC_CMD_BC;
                mmcio->cmd.data = NULL;
                mmcio->stop.opcode = 0;
 
                /* XXX Reset I/O portion as well */
                break;
 
        case PROBE_SDIO_RESET:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                          ("Start with PROBE_SDIO_RESET\n"));
                uint32_t mmc_arg = SD_IO_RW_ADR(SD_IO_CCCR_CTL)
                        | SD_IO_RW_DAT(CCCR_CTL_RES) | SD_IO_RW_WR | SD_IO_RW_RAW;
                cam_fill_mmcio(&start_ccb->mmcio,
                               /*retries*/ 0,
                               /*cbfcnp*/ mmcprobe_done,
                               /*flags*/ CAM_DIR_NONE,
                               /*mmc_opcode*/ SD_IO_RW_DIRECT,
                               /*mmc_arg*/ mmc_arg,
                               /*mmc_flags*/ MMC_RSP_R5 | MMC_CMD_AC,
                               /*mmc_data*/ NULL,
                               /*timeout*/ 1000);
                break;
        case PROBE_SEND_IF_COND:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                          ("Start with PROBE_SEND_IF_COND\n"));
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = SD_SEND_IF_COND; /* CMD 8 */
                mmcio->cmd.arg = (1 << 8) + 0xAA;
                mmcio->cmd.flags = MMC_RSP_R7 | MMC_CMD_BCR;
                mmcio->stop.opcode = 0;
                break;
 
        case PROBE_SDIO_INIT:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                          ("Start with PROBE_SDIO_INIT\n"));
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = IO_SEND_OP_COND; /* CMD 5 */
                mmcio->cmd.arg = mmcp->io_ocr;
                mmcio->cmd.flags = MMC_RSP_R4;
                mmcio->stop.opcode = 0;
                break;
 
        case PROBE_MMC_INIT:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                          ("Start with PROBE_MMC_INIT\n"));
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = MMC_SEND_OP_COND; /* CMD 1 */
                mmcio->cmd.arg = MMC_OCR_CCS | mmcp->card_ocr; /* CCS + ocr */;
                mmcio->cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
                mmcio->stop.opcode = 0;
                break;
 
        case PROBE_SEND_APP_OP_COND:
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                if (softc->flags & PROBE_FLAG_ACMD_SENT) {
                        mmcio->cmd.opcode = ACMD_SD_SEND_OP_COND; /* CMD 41 */
                        /*
                         * We set CCS bit because we do support SDHC cards.
                         * XXX: Don't set CCS if no response to CMD8.
                         */
                        uint32_t cmd_arg = MMC_OCR_CCS | mmcp->card_ocr; /* CCS + ocr */
                        if (softc->acmd41_count < 10 && mmcp->card_ocr != 0 )
                                cmd_arg |= MMC_OCR_S18R;
                        mmcio->cmd.arg = cmd_arg;
                        mmcio->cmd.flags = MMC_RSP_R3 | MMC_CMD_BCR;
                        softc->acmd41_count++;
                } else {
                        mmcio->cmd.opcode = MMC_APP_CMD; /* CMD 55 */
                        mmcio->cmd.arg = 0; /* rca << 16 */
                        mmcio->cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
                }
                mmcio->stop.opcode = 0;
                break;
 
        case PROBE_GET_CID: /* XXX move to mmc_da */
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = MMC_ALL_SEND_CID;
                mmcio->cmd.arg = 0;
                mmcio->cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
                mmcio->stop.opcode = 0;
                break;
        case PROBE_SEND_RELATIVE_ADDR:
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = SD_SEND_RELATIVE_ADDR;
                mmcio->cmd.arg = 0;
                mmcio->cmd.flags = MMC_RSP_R6 | MMC_CMD_BCR;
                mmcio->stop.opcode = 0;
                break;
        case PROBE_MMC_SET_RELATIVE_ADDR:
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = MMC_SET_RELATIVE_ADDR;
                mmcio->cmd.arg = MMC_PROPOSED_RCA << 16;
                mmcio->cmd.flags = MMC_RSP_R1 | MMC_CMD_AC;
                mmcio->stop.opcode = 0;
                break;
        case PROBE_SELECT_CARD:
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = MMC_SELECT_CARD;
                mmcio->cmd.arg = (uint32_t)path->device->mmc_ident_data.card_rca << 16;
                mmcio->cmd.flags = MMC_RSP_R1B | MMC_CMD_AC;
                mmcio->stop.opcode = 0;
                break;
        case PROBE_GET_CSD: /* XXX move to mmc_da */
                init_standard_ccb(start_ccb, XPT_MMC_IO);
                mmcio->cmd.opcode = MMC_SEND_CSD;
                mmcio->cmd.arg = (uint32_t)path->device->mmc_ident_data.card_rca << 16;
                mmcio->cmd.flags = MMC_RSP_R2 | MMC_CMD_BCR;
                mmcio->stop.opcode = 0;
                break;
        case PROBE_DONE:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("Start with PROBE_DONE\n"));
                init_standard_ccb(start_ccb, XPT_SET_TRAN_SETTINGS);
                cts->ios.bus_mode = pushpull;
                cts->ios_valid = MMC_BM;
                xpt_action(start_ccb);
                return;
                /* NOTREACHED */
                break;
        case PROBE_INVALID:
                break;
        default:
                CAM_DEBUG(start_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("probestart: invalid action state 0x%x\n", softc->action));
                panic("default: case in mmc_probe_start()");
        }
 
        start_ccb->ccb_h.flags |= CAM_DEV_QFREEZE;
        xpt_action(start_ccb);
}
 
static void mmcprobe_cleanup(struct cam_periph *periph)
{
        free(periph->softc, M_CAMXPT);
}
 
static void
mmcprobe_done(struct cam_periph *periph, union ccb *done_ccb)
{
        mmcprobe_softc *softc;
        struct cam_path *path;
 
        int err;
        struct ccb_mmcio *mmcio;
        u_int32_t  priority;
 
        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("mmcprobe_done\n"));
        softc = (mmcprobe_softc *)periph->softc;
        path = done_ccb->ccb_h.path;
        priority = done_ccb->ccb_h.pinfo.priority;
 
        switch (softc->action) {
        case PROBE_RESET:
                /* FALLTHROUGH */
        case PROBE_IDENTIFY:
        {
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_RESET\n"));
                PROBE_SET_ACTION(softc, PROBE_POWER_OFF);
                break;
        }
        case PROBE_POWER_OFF:
        {
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_POWER_OFF\n"));
                PROBE_SET_ACTION(softc, PROBE_GET_HOST_OCR);
                break;
        }
        case PROBE_GET_HOST_OCR:
        {
                struct ccb_trans_settings_mmc *cts;
                cts = &done_ccb->cts.proto_specific.mmc;
                softc->host_ocr = cts->host_ocr;
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_GET_HOST_OCR (Got OCR=%x\n", softc->host_ocr));
                PROBE_SET_ACTION(softc, PROBE_RESET_BUS);
                break;
        }
        case PROBE_RESET_BUS:
        {
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_RESET_BUS\n"));
                PROBE_SET_ACTION(softc, PROBE_SET_ID_FREQ);
                break;
        }
        case PROBE_SET_ID_FREQ:
        {
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_SET_ID_FREQ\n"));
                PROBE_SET_ACTION(softc, PROBE_SET_CS);
                break;
        }
        case PROBE_SET_CS:
        {
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_SET_CS\n"));
                PROBE_SET_ACTION(softc, PROBE_GO_IDLE_STATE);
                break;
        }
        case PROBE_GO_IDLE_STATE:
        {
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE, ("done with PROBE_GO_IDLE_STATE\n"));
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
 
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("GO_IDLE_STATE failed with error %d\n",
                                   err));
 
                        /* There was a device there, but now it's gone... */
                        if ((path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
                                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("Device lost!\n"));
 
                                xpt_async(AC_LOST_DEVICE, path, NULL);
                        }
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
                path->device->protocol = PROTO_MMCSD;
                PROBE_SET_ACTION(softc, PROBE_SEND_IF_COND);
                break;
        }
        case PROBE_SEND_IF_COND:
        {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
                struct mmc_params *mmcp = &path->device->mmc_ident_data;
 
                if (err != MMC_ERR_NONE || mmcio->cmd.resp[0] != 0x1AA) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("IF_COND: error %d, pattern %08x\n",
                                   err, mmcio->cmd.resp[0]));
                } else {
                        mmcp->card_features |= CARD_FEATURE_SD20;
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("SD 2.0 interface conditions: OK\n"));
                }
                PROBE_SET_ACTION(softc, PROBE_SDIO_RESET);
                break;
        }
        case PROBE_SDIO_RESET:
        {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
 
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("SDIO_RESET: error %d, CCCR CTL register: %08x\n",
                    err, mmcio->cmd.resp[0]));
                PROBE_SET_ACTION(softc, PROBE_SDIO_INIT);
                break;
        }
        case PROBE_SDIO_INIT:
        {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
                struct mmc_params *mmcp = &path->device->mmc_ident_data;
 
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("SDIO_INIT: error %d, %08x %08x %08x %08x\n",
                    err, mmcio->cmd.resp[0],
                    mmcio->cmd.resp[1],
                    mmcio->cmd.resp[2],
                    mmcio->cmd.resp[3]));
 
                /*
                 * Error here means that this card is not SDIO,
                 * so proceed with memory init as if nothing has happened
                 */
                if (err != MMC_ERR_NONE) {
                        PROBE_SET_ACTION(softc, PROBE_SEND_APP_OP_COND);
                        break;
                }
                mmcp->card_features |= CARD_FEATURE_SDIO;
                uint32_t ioifcond = mmcio->cmd.resp[0];
                uint32_t io_ocr = ioifcond & R4_IO_OCR_MASK;
 
                mmcp->sdio_func_count = R4_IO_NUM_FUNCTIONS(ioifcond);
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("SDIO card: %d functions\n", mmcp->sdio_func_count));
                if (io_ocr == 0) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                          ("SDIO OCR invalid, retrying\n"));
                        break; /* Retry */
                }
 
                if (io_ocr != 0 && mmcp->io_ocr == 0) {
                        mmcp->io_ocr = io_ocr;
                        break; /* Retry, this time with non-0 OCR */
                }
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("SDIO OCR: %08x\n", mmcp->io_ocr));
 
                if (ioifcond & R4_IO_MEM_PRESENT) {
                        /* Combo card -- proceed to memory initialization */
                        PROBE_SET_ACTION(softc, PROBE_SEND_APP_OP_COND);
                } else {
                        /* No memory portion -- get RCA and select card */
                        PROBE_SET_ACTION(softc, PROBE_SEND_RELATIVE_ADDR);
                }
                break;
        }
        case PROBE_MMC_INIT:
        {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
                struct mmc_params *mmcp = &path->device->mmc_ident_data;
 
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("MMC_INIT: error %d, resp %08x\n",
                                   err, mmcio->cmd.resp[0]));
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("MMC card, OCR %08x\n", mmcio->cmd.resp[0]));
 
                if (mmcp->card_ocr == 0) {
                        /* We haven't sent the OCR to the card yet -- do it */
                        mmcp->card_ocr = mmcio->cmd.resp[0];
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                            ("-> sending OCR to card\n"));
                        break;
                }
 
                if (!(mmcio->cmd.resp[0] & MMC_OCR_CARD_BUSY)) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                            ("Card is still powering up\n"));
                        break;
                }
 
                mmcp->card_features |= CARD_FEATURE_MMC | CARD_FEATURE_MEMORY;
                PROBE_SET_ACTION(softc, PROBE_GET_CID);
                break;
        }
        case PROBE_SEND_APP_OP_COND:
        {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
 
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("APP_OP_COND: error %d, resp %08x\n",
                                   err, mmcio->cmd.resp[0]));
                        PROBE_SET_ACTION(softc, PROBE_MMC_INIT);
                        break;
                }
 
                if (!(softc->flags & PROBE_FLAG_ACMD_SENT)) {
                        /* Don't change the state */
                        softc->flags |= PROBE_FLAG_ACMD_SENT;
                        break;
                }
 
                softc->flags &= ~PROBE_FLAG_ACMD_SENT;
                if ((mmcio->cmd.resp[0] & MMC_OCR_CARD_BUSY) ||
                    (mmcio->cmd.arg & MMC_OCR_VOLTAGE) == 0) {
                        struct mmc_params *mmcp = &path->device->mmc_ident_data;
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                            ("Card OCR: %08x\n",  mmcio->cmd.resp[0]));
                        if (mmcp->card_ocr == 0) {
                                mmcp->card_ocr = mmcio->cmd.resp[0];
                                /* Now when we know OCR that we want -- send it to card */
                                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                    ("-> sending OCR to card\n"));
                        } else {
                                /* We already know the OCR and despite of that we
                                 * are processing the answer to ACMD41 -> move on
                                 */
                                PROBE_SET_ACTION(softc, PROBE_GET_CID);
                        }
                        /* Getting an answer to ACMD41 means the card has memory */
                        mmcp->card_features |= CARD_FEATURE_MEMORY;
 
                        /* Standard capacity vs High Capacity memory card */
                        if (mmcio->cmd.resp[0] & MMC_OCR_CCS) {
                                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                    ("Card is SDHC\n"));
                                mmcp->card_features |= CARD_FEATURE_SDHC;
                        }
 
                        /* Whether the card supports 1.8V signaling */
                        if (mmcio->cmd.resp[0] & MMC_OCR_S18A) {
                                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                          ("Card supports 1.8V signaling\n"));
                                mmcp->card_features |= CARD_FEATURE_18V;
                                if (softc->flags & PROBE_FLAG_HOST_CAN_DO_18V) {
                                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                                  ("Host supports 1.8V signaling. Switch voltage!\n"));
                                        done_ccb->ccb_h.func_code = XPT_SET_TRAN_SETTINGS;
                                        done_ccb->ccb_h.flags = CAM_DIR_NONE;
                                        done_ccb->ccb_h.retry_count = 0;
                                        done_ccb->ccb_h.timeout = 100;
                                        done_ccb->ccb_h.cbfcnp = NULL;
                                        done_ccb->cts.proto_specific.mmc.ios.vccq = vccq_180;
                                        done_ccb->cts.proto_specific.mmc.ios_valid = MMC_VCCQ;
                                        xpt_action(done_ccb);
                                }
                        }
                } else {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("Card not ready: %08x\n",  mmcio->cmd.resp[0]));
                        /* Send CMD55+ACMD41 once again  */
                        PROBE_SET_ACTION(softc, PROBE_SEND_APP_OP_COND);
                }
 
                break;
        }
        case PROBE_GET_CID: /* XXX move to mmc_da */
        {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
 
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("PROBE_GET_CID: error %d\n", err));
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
 
                struct mmc_params *mmcp = &path->device->mmc_ident_data;
                memcpy(mmcp->card_cid, mmcio->cmd.resp, 4 * sizeof(uint32_t));
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("CID %08x%08x%08x%08x\n",
                      mmcp->card_cid[0],
                      mmcp->card_cid[1],
                      mmcp->card_cid[2],
                      mmcp->card_cid[3]));
                if (mmcp->card_features & CARD_FEATURE_MMC)
                        PROBE_SET_ACTION(softc, PROBE_MMC_SET_RELATIVE_ADDR);
                else
                        PROBE_SET_ACTION(softc, PROBE_SEND_RELATIVE_ADDR);
                break;
        }
        case PROBE_SEND_RELATIVE_ADDR: {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
                struct mmc_params *mmcp = &path->device->mmc_ident_data;
                uint16_t rca = mmcio->cmd.resp[0] >> 16;
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("Card published RCA: %u\n", rca));
                path->device->mmc_ident_data.card_rca = rca;
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("PROBE_SEND_RELATIVE_ADDR: error %d\n", err));
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
 
                /* If memory is present, get CSD, otherwise select card */
                if (mmcp->card_features & CARD_FEATURE_MEMORY)
                        PROBE_SET_ACTION(softc, PROBE_GET_CSD);
                else
                        PROBE_SET_ACTION(softc, PROBE_SELECT_CARD);
                break;
        }
        case PROBE_MMC_SET_RELATIVE_ADDR:
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                            ("PROBE_MMC_SET_RELATIVE_ADDR: error %d\n", err));
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
                path->device->mmc_ident_data.card_rca = MMC_PROPOSED_RCA;
                PROBE_SET_ACTION(softc, PROBE_GET_CSD);
                break;
        case PROBE_GET_CSD: {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
 
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("PROBE_GET_CSD: error %d\n", err));
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
 
                struct mmc_params *mmcp = &path->device->mmc_ident_data;
                memcpy(mmcp->card_csd, mmcio->cmd.resp, 4 * sizeof(uint32_t));
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                    ("CSD %08x%08x%08x%08x\n",
                      mmcp->card_csd[0],
                      mmcp->card_csd[1],
                      mmcp->card_csd[2],
                      mmcp->card_csd[3]));
                PROBE_SET_ACTION(softc, PROBE_SELECT_CARD);
                break;
        }
        case PROBE_SELECT_CARD: {
                mmcio = &done_ccb->mmcio;
                err = mmcio->cmd.error;
                if (err != MMC_ERR_NONE) {
                        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                                  ("PROBE_SEND_RELATIVE_ADDR: error %d\n", err));
                        PROBE_SET_ACTION(softc, PROBE_INVALID);
                        break;
                }
 
                PROBE_SET_ACTION(softc, PROBE_DONE);
                break;
        }
        default:
                CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
                          ("mmcprobe_done: invalid action state 0x%x\n", softc->action));
                panic("default: case in mmc_probe_done()");
        }
 
        if (softc->action == PROBE_INVALID &&
          (path->device->flags & CAM_DEV_UNCONFIGURED) == 0) {
                xpt_async(AC_LOST_DEVICE, path, NULL);
        }
 
        if (softc->action != PROBE_INVALID)
                xpt_schedule(periph, priority);
        /* Drop freeze taken due to CAM_DEV_QFREEZE flag set. */
        int frozen = cam_release_devq(path, 0, 0, 0, FALSE);
        CAM_DEBUG(done_ccb->ccb_h.path, CAM_DEBUG_PROBE,
          ("mmcprobe_done: remaining freeze count %d\n", frozen));
 
        if (softc->action == PROBE_DONE) {
                /* Notify the system that the device is found! */
                if (periph->path->device->flags & CAM_DEV_UNCONFIGURED) {
                        path->device->flags &= ~CAM_DEV_UNCONFIGURED;
                        xpt_acquire_device(path->device);
                        done_ccb->ccb_h.func_code = XPT_GDEV_TYPE;
                        xpt_action(done_ccb);
                        xpt_async(AC_FOUND_DEVICE, path, done_ccb);
                }
        }
        xpt_release_ccb(done_ccb);
        if (softc->action == PROBE_DONE || softc->action == PROBE_INVALID) {
                cam_periph_invalidate(periph);
                cam_periph_release_locked(periph);
        }
}
 
void
mmc_path_inq(struct ccb_pathinq *cpi, const char *hba,
    const struct cam_sim *sim, size_t maxio)
{
 
        cpi->version_num = 1;
        cpi->hba_inquiry = 0;
        cpi->target_sprt = 0;
        cpi->hba_misc = PIM_NOBUSRESET | PIM_SEQSCAN;
        cpi->hba_eng_cnt = 0;
        cpi->max_target = 0;
        cpi->max_lun = 0;
        cpi->initiator_id = 1;
        cpi->maxio = maxio;
        strncpy(cpi->sim_vid, "FreeBSD", SIM_IDLEN);
        strncpy(cpi->hba_vid, hba, HBA_IDLEN);
        strncpy(cpi->dev_name, cam_sim_name(sim), DEV_IDLEN);
        cpi->unit_number = cam_sim_unit(sim);
        cpi->bus_id = cam_sim_bus(sim);
        cpi->protocol = PROTO_MMCSD;
        cpi->protocol_version = SCSI_REV_0;
        cpi->transport = XPORT_MMCSD;
        cpi->transport_version = 1;
 
        cpi->base_transfer_speed = 100; /* XXX WTF? */
 
        cpi->ccb_h.status = CAM_REQ_CMP;
}