hw: move target-independent files to subdirectories

This patch tackles all files that are compiled once, moving
them to subdirectories of hw/.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

5 files changed, 3857 insertions, 0 deletions

diff --git a/hw/sd/Makefile.objs b/hw/sd/Makefile.objs
index e69de29..8acce02 100644
--- a/hw/sd/Makefile.objs
+++ b/hw/sd/Makefile.objs
@@ -0,0 +1,4 @@
+common-obj-$(CONFIG_PL181) += pl181.o
+common-obj-$(CONFIG_SSI_SD) += ssi-sd.o
+common-obj-$(CONFIG_SD) += sd.o
+common-obj-$(CONFIG_SDHCI) += sdhci.o
diff --git a/hw/sd/pl181.c b/hw/sd/pl181.c
new file mode 100644
index 0000000..2527296
--- /dev/null
+++ b/hw/sd/pl181.c
@@ -0,0 +1,515 @@
+/*
+ * Arm PrimeCell PL181 MultiMedia Card Interface
+ *
+ * Copyright (c) 2007 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licensed under the GPL.
+ */
+
+#include "sysemu/blockdev.h"
+#include "hw/sysbus.h"
+#include "hw/sd.h"
+
+//#define DEBUG_PL181 1
+
+#ifdef DEBUG_PL181
+#define DPRINTF(fmt, ...) \
+do { printf("pl181: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) do {} while(0)
+#endif
+
+#define PL181_FIFO_LEN 16
+
+typedef struct {
+    SysBusDevice busdev;
+    MemoryRegion iomem;
+    SDState *card;
+    uint32_t clock;
+    uint32_t power;
+    uint32_t cmdarg;
+    uint32_t cmd;
+    uint32_t datatimer;
+    uint32_t datalength;
+    uint32_t respcmd;
+    uint32_t response[4];
+    uint32_t datactrl;
+    uint32_t datacnt;
+    uint32_t status;
+    uint32_t mask[2];
+    int32_t fifo_pos;
+    int32_t fifo_len;
+    /* The linux 2.6.21 driver is buggy, and misbehaves if new data arrives
+       while it is reading the FIFO.  We hack around this be defering
+       subsequent transfers until after the driver polls the status word.
+       http://www.arm.linux.org.uk/developer/patches/viewpatch.php?id=4446/1
+     */
+    int32_t linux_hack;
+    uint32_t fifo[PL181_FIFO_LEN];
+    qemu_irq irq[2];
+    /* GPIO outputs for 'card is readonly' and 'card inserted' */
+    qemu_irq cardstatus[2];
+} pl181_state;
+
+static const VMStateDescription vmstate_pl181 = {
+    .name = "pl181",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(clock, pl181_state),
+        VMSTATE_UINT32(power, pl181_state),
+        VMSTATE_UINT32(cmdarg, pl181_state),
+        VMSTATE_UINT32(cmd, pl181_state),
+        VMSTATE_UINT32(datatimer, pl181_state),
+        VMSTATE_UINT32(datalength, pl181_state),
+        VMSTATE_UINT32(respcmd, pl181_state),
+        VMSTATE_UINT32_ARRAY(response, pl181_state, 4),
+        VMSTATE_UINT32(datactrl, pl181_state),
+        VMSTATE_UINT32(datacnt, pl181_state),
+        VMSTATE_UINT32(status, pl181_state),
+        VMSTATE_UINT32_ARRAY(mask, pl181_state, 2),
+        VMSTATE_INT32(fifo_pos, pl181_state),
+        VMSTATE_INT32(fifo_len, pl181_state),
+        VMSTATE_INT32(linux_hack, pl181_state),
+        VMSTATE_UINT32_ARRAY(fifo, pl181_state, PL181_FIFO_LEN),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+#define PL181_CMD_INDEX     0x3f
+#define PL181_CMD_RESPONSE  (1 << 6)
+#define PL181_CMD_LONGRESP  (1 << 7)
+#define PL181_CMD_INTERRUPT (1 << 8)
+#define PL181_CMD_PENDING   (1 << 9)
+#define PL181_CMD_ENABLE    (1 << 10)
+
+#define PL181_DATA_ENABLE             (1 << 0)
+#define PL181_DATA_DIRECTION          (1 << 1)
+#define PL181_DATA_MODE               (1 << 2)
+#define PL181_DATA_DMAENABLE          (1 << 3)
+
+#define PL181_STATUS_CMDCRCFAIL       (1 << 0)
+#define PL181_STATUS_DATACRCFAIL      (1 << 1)
+#define PL181_STATUS_CMDTIMEOUT       (1 << 2)
+#define PL181_STATUS_DATATIMEOUT      (1 << 3)
+#define PL181_STATUS_TXUNDERRUN       (1 << 4)
+#define PL181_STATUS_RXOVERRUN        (1 << 5)
+#define PL181_STATUS_CMDRESPEND       (1 << 6)
+#define PL181_STATUS_CMDSENT          (1 << 7)
+#define PL181_STATUS_DATAEND          (1 << 8)
+#define PL181_STATUS_DATABLOCKEND     (1 << 10)
+#define PL181_STATUS_CMDACTIVE        (1 << 11)
+#define PL181_STATUS_TXACTIVE         (1 << 12)
+#define PL181_STATUS_RXACTIVE         (1 << 13)
+#define PL181_STATUS_TXFIFOHALFEMPTY  (1 << 14)
+#define PL181_STATUS_RXFIFOHALFFULL   (1 << 15)
+#define PL181_STATUS_TXFIFOFULL       (1 << 16)
+#define PL181_STATUS_RXFIFOFULL       (1 << 17)
+#define PL181_STATUS_TXFIFOEMPTY      (1 << 18)
+#define PL181_STATUS_RXFIFOEMPTY      (1 << 19)
+#define PL181_STATUS_TXDATAAVLBL      (1 << 20)
+#define PL181_STATUS_RXDATAAVLBL      (1 << 21)
+
+#define PL181_STATUS_TX_FIFO (PL181_STATUS_TXACTIVE \
+                             |PL181_STATUS_TXFIFOHALFEMPTY \
+                             |PL181_STATUS_TXFIFOFULL \
+                             |PL181_STATUS_TXFIFOEMPTY \
+                             |PL181_STATUS_TXDATAAVLBL)
+#define PL181_STATUS_RX_FIFO (PL181_STATUS_RXACTIVE \
+                             |PL181_STATUS_RXFIFOHALFFULL \
+                             |PL181_STATUS_RXFIFOFULL \
+                             |PL181_STATUS_RXFIFOEMPTY \
+                             |PL181_STATUS_RXDATAAVLBL)
+
+static const unsigned char pl181_id[] =
+{ 0x81, 0x11, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
+
+static void pl181_update(pl181_state *s)
+{
+    int i;
+    for (i = 0; i < 2; i++) {
+        qemu_set_irq(s->irq[i], (s->status & s->mask[i]) != 0);
+    }
+}
+
+static void pl181_fifo_push(pl181_state *s, uint32_t value)
+{
+    int n;
+
+    if (s->fifo_len == PL181_FIFO_LEN) {
+        fprintf(stderr, "pl181: FIFO overflow\n");
+        return;
+    }
+    n = (s->fifo_pos + s->fifo_len) & (PL181_FIFO_LEN - 1);
+    s->fifo_len++;
+    s->fifo[n] = value;
+    DPRINTF("FIFO push %08x\n", (int)value);
+}
+
+static uint32_t pl181_fifo_pop(pl181_state *s)
+{
+    uint32_t value;
+
+    if (s->fifo_len == 0) {
+        fprintf(stderr, "pl181: FIFO underflow\n");
+        return 0;
+    }
+    value = s->fifo[s->fifo_pos];
+    s->fifo_len--;
+    s->fifo_pos = (s->fifo_pos + 1) & (PL181_FIFO_LEN - 1);
+    DPRINTF("FIFO pop %08x\n", (int)value);
+    return value;
+}
+
+static void pl181_send_command(pl181_state *s)
+{
+    SDRequest request;
+    uint8_t response[16];
+    int rlen;
+
+    request.cmd = s->cmd & PL181_CMD_INDEX;
+    request.arg = s->cmdarg;
+    DPRINTF("Command %d %08x\n", request.cmd, request.arg);
+    rlen = sd_do_command(s->card, &request, response);
+    if (rlen < 0)
+        goto error;
+    if (s->cmd & PL181_CMD_RESPONSE) {
+#define RWORD(n) ((response[n] << 24) | (response[n + 1] << 16) \
+                  | (response[n + 2] << 8) | response[n + 3])
+        if (rlen == 0 || (rlen == 4 && (s->cmd & PL181_CMD_LONGRESP)))
+            goto error;
+        if (rlen != 4 && rlen != 16)
+            goto error;
+        s->response[0] = RWORD(0);
+        if (rlen == 4) {
+            s->response[1] = s->response[2] = s->response[3] = 0;
+        } else {
+            s->response[1] = RWORD(4);
+            s->response[2] = RWORD(8);
+            s->response[3] = RWORD(12) & ~1;
+        }
+        DPRINTF("Response received\n");
+        s->status |= PL181_STATUS_CMDRESPEND;
+#undef RWORD
+    } else {
+        DPRINTF("Command sent\n");
+        s->status |= PL181_STATUS_CMDSENT;
+    }
+    return;
+
+error:
+    DPRINTF("Timeout\n");
+    s->status |= PL181_STATUS_CMDTIMEOUT;
+}
+
+/* Transfer data between the card and the FIFO.  This is complicated by
+   the FIFO holding 32-bit words and the card taking data in single byte
+   chunks.  FIFO bytes are transferred in little-endian order.  */
+
+static void pl181_fifo_run(pl181_state *s)
+{
+    uint32_t bits;
+    uint32_t value = 0;
+    int n;
+    int is_read;
+
+    is_read = (s->datactrl & PL181_DATA_DIRECTION) != 0;
+    if (s->datacnt != 0 && (!is_read || sd_data_ready(s->card))
+            && !s->linux_hack) {
+        if (is_read) {
+            n = 0;
+            while (s->datacnt && s->fifo_len < PL181_FIFO_LEN) {
+                value |= (uint32_t)sd_read_data(s->card) << (n * 8);
+                s->datacnt--;
+                n++;
+                if (n == 4) {
+                    pl181_fifo_push(s, value);
+                    n = 0;
+                    value = 0;
+                }
+            }
+            if (n != 0) {
+                pl181_fifo_push(s, value);
+            }
+        } else { /* write */
+            n = 0;
+            while (s->datacnt > 0 && (s->fifo_len > 0 || n > 0)) {
+                if (n == 0) {
+                    value = pl181_fifo_pop(s);
+                    n = 4;
+                }
+                n--;
+                s->datacnt--;
+                sd_write_data(s->card, value & 0xff);
+                value >>= 8;
+            }
+        }
+    }
+    s->status &= ~(PL181_STATUS_RX_FIFO | PL181_STATUS_TX_FIFO);
+    if (s->datacnt == 0) {
+        s->status |= PL181_STATUS_DATAEND;
+        /* HACK: */
+        s->status |= PL181_STATUS_DATABLOCKEND;
+        DPRINTF("Transfer Complete\n");
+    }
+    if (s->datacnt == 0 && s->fifo_len == 0) {
+        s->datactrl &= ~PL181_DATA_ENABLE;
+        DPRINTF("Data engine idle\n");
+    } else {
+        /* Update FIFO bits.  */
+        bits = PL181_STATUS_TXACTIVE | PL181_STATUS_RXACTIVE;
+        if (s->fifo_len == 0) {
+            bits |= PL181_STATUS_TXFIFOEMPTY;
+            bits |= PL181_STATUS_RXFIFOEMPTY;
+        } else {
+            bits |= PL181_STATUS_TXDATAAVLBL;
+            bits |= PL181_STATUS_RXDATAAVLBL;
+        }
+        if (s->fifo_len == 16) {
+            bits |= PL181_STATUS_TXFIFOFULL;
+            bits |= PL181_STATUS_RXFIFOFULL;
+        }
+        if (s->fifo_len <= 8) {
+            bits |= PL181_STATUS_TXFIFOHALFEMPTY;
+        }
+        if (s->fifo_len >= 8) {
+            bits |= PL181_STATUS_RXFIFOHALFFULL;
+        }
+        if (s->datactrl & PL181_DATA_DIRECTION) {
+            bits &= PL181_STATUS_RX_FIFO;
+        } else {
+            bits &= PL181_STATUS_TX_FIFO;
+        }
+        s->status |= bits;
+    }
+}
+
+static uint64_t pl181_read(void *opaque, hwaddr offset,
+                           unsigned size)
+{
+    pl181_state *s = (pl181_state *)opaque;
+    uint32_t tmp;
+
+    if (offset >= 0xfe0 && offset < 0x1000) {
+        return pl181_id[(offset - 0xfe0) >> 2];
+    }
+    switch (offset) {
+    case 0x00: /* Power */
+        return s->power;
+    case 0x04: /* Clock */
+        return s->clock;
+    case 0x08: /* Argument */
+        return s->cmdarg;
+    case 0x0c: /* Command */
+        return s->cmd;
+    case 0x10: /* RespCmd */
+        return s->respcmd;
+    case 0x14: /* Response0 */
+        return s->response[0];
+    case 0x18: /* Response1 */
+        return s->response[1];
+    case 0x1c: /* Response2 */
+        return s->response[2];
+    case 0x20: /* Response3 */
+        return s->response[3];
+    case 0x24: /* DataTimer */
+        return s->datatimer;
+    case 0x28: /* DataLength */
+        return s->datalength;
+    case 0x2c: /* DataCtrl */
+        return s->datactrl;
+    case 0x30: /* DataCnt */
+        return s->datacnt;
+    case 0x34: /* Status */
+        tmp = s->status;
+        if (s->linux_hack) {
+            s->linux_hack = 0;
+            pl181_fifo_run(s);
+            pl181_update(s);
+        }
+        return tmp;
+    case 0x3c: /* Mask0 */
+        return s->mask[0];
+    case 0x40: /* Mask1 */
+        return s->mask[1];
+    case 0x48: /* FifoCnt */
+        /* The documentation is somewhat vague about exactly what FifoCnt
+           does.  On real hardware it appears to be when decrememnted
+           when a word is transferred between the FIFO and the serial
+           data engine.  DataCnt is decremented after each byte is
+           transferred between the serial engine and the card.
+           We don't emulate this level of detail, so both can be the same.  */
+        tmp = (s->datacnt + 3) >> 2;
+        if (s->linux_hack) {
+            s->linux_hack = 0;
+            pl181_fifo_run(s);
+            pl181_update(s);
+        }
+        return tmp;
+    case 0x80: case 0x84: case 0x88: case 0x8c: /* FifoData */
+    case 0x90: case 0x94: case 0x98: case 0x9c:
+    case 0xa0: case 0xa4: case 0xa8: case 0xac:
+    case 0xb0: case 0xb4: case 0xb8: case 0xbc:
+        if (s->fifo_len == 0) {
+            qemu_log_mask(LOG_GUEST_ERROR, "pl181: Unexpected FIFO read\n");
+            return 0;
+        } else {
+            uint32_t value;
+            value = pl181_fifo_pop(s);
+            s->linux_hack = 1;
+            pl181_fifo_run(s);
+            pl181_update(s);
+            return value;
+        }
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "pl181_read: Bad offset %x\n", (int)offset);
+        return 0;
+    }
+}
+
+static void pl181_write(void *opaque, hwaddr offset,
+                        uint64_t value, unsigned size)
+{
+    pl181_state *s = (pl181_state *)opaque;
+
+    switch (offset) {
+    case 0x00: /* Power */
+        s->power = value & 0xff;
+        break;
+    case 0x04: /* Clock */
+        s->clock = value & 0xff;
+        break;
+    case 0x08: /* Argument */
+        s->cmdarg = value;
+        break;
+    case 0x0c: /* Command */
+        s->cmd = value;
+        if (s->cmd & PL181_CMD_ENABLE) {
+            if (s->cmd & PL181_CMD_INTERRUPT) {
+                qemu_log_mask(LOG_UNIMP,
+                              "pl181: Interrupt mode not implemented\n");
+            } if (s->cmd & PL181_CMD_PENDING) {
+                qemu_log_mask(LOG_UNIMP,
+                              "pl181: Pending commands not implemented\n");
+            } else {
+                pl181_send_command(s);
+                pl181_fifo_run(s);
+            }
+            /* The command has completed one way or the other.  */
+            s->cmd &= ~PL181_CMD_ENABLE;
+        }
+        break;
+    case 0x24: /* DataTimer */
+        s->datatimer = value;
+        break;
+    case 0x28: /* DataLength */
+        s->datalength = value & 0xffff;
+        break;
+    case 0x2c: /* DataCtrl */
+        s->datactrl = value & 0xff;
+        if (value & PL181_DATA_ENABLE) {
+            s->datacnt = s->datalength;
+            pl181_fifo_run(s);
+        }
+        break;
+    case 0x38: /* Clear */
+        s->status &= ~(value & 0x7ff);
+        break;
+    case 0x3c: /* Mask0 */
+        s->mask[0] = value;
+        break;
+    case 0x40: /* Mask1 */
+        s->mask[1] = value;
+        break;
+    case 0x80: case 0x84: case 0x88: case 0x8c: /* FifoData */
+    case 0x90: case 0x94: case 0x98: case 0x9c:
+    case 0xa0: case 0xa4: case 0xa8: case 0xac:
+    case 0xb0: case 0xb4: case 0xb8: case 0xbc:
+        if (s->datacnt == 0) {
+            qemu_log_mask(LOG_GUEST_ERROR, "pl181: Unexpected FIFO write\n");
+        } else {
+            pl181_fifo_push(s, value);
+            pl181_fifo_run(s);
+        }
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "pl181_write: Bad offset %x\n", (int)offset);
+    }
+    pl181_update(s);
+}
+
+static const MemoryRegionOps pl181_ops = {
+    .read = pl181_read,
+    .write = pl181_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void pl181_reset(DeviceState *d)
+{
+    pl181_state *s = DO_UPCAST(pl181_state, busdev.qdev, d);
+
+    s->power = 0;
+    s->cmdarg = 0;
+    s->cmd = 0;
+    s->datatimer = 0;
+    s->datalength = 0;
+    s->respcmd = 0;
+    s->response[0] = 0;
+    s->response[1] = 0;
+    s->response[2] = 0;
+    s->response[3] = 0;
+    s->datatimer = 0;
+    s->datalength = 0;
+    s->datactrl = 0;
+    s->datacnt = 0;
+    s->status = 0;
+    s->linux_hack = 0;
+    s->mask[0] = 0;
+    s->mask[1] = 0;
+
+    /* We can assume our GPIO outputs have been wired up now */
+    sd_set_cb(s->card, s->cardstatus[0], s->cardstatus[1]);
+}
+
+static int pl181_init(SysBusDevice *dev)
+{
+    pl181_state *s = FROM_SYSBUS(pl181_state, dev);
+    DriveInfo *dinfo;
+
+    memory_region_init_io(&s->iomem, &pl181_ops, s, "pl181", 0x1000);
+    sysbus_init_mmio(dev, &s->iomem);
+    sysbus_init_irq(dev, &s->irq[0]);
+    sysbus_init_irq(dev, &s->irq[1]);
+    qdev_init_gpio_out(&s->busdev.qdev, s->cardstatus, 2);
+    dinfo = drive_get_next(IF_SD);
+    s->card = sd_init(dinfo ? dinfo->bdrv : NULL, 0);
+    return 0;
+}
+
+static void pl181_class_init(ObjectClass *klass, void *data)
+{
+    SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
+    DeviceClass *k = DEVICE_CLASS(klass);
+
+    sdc->init = pl181_init;
+    k->vmsd = &vmstate_pl181;
+    k->reset = pl181_reset;
+    k->no_user = 1;
+}
+
+static const TypeInfo pl181_info = {
+    .name          = "pl181",
+    .parent        = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(pl181_state),
+    .class_init    = pl181_class_init,
+};
+
+static void pl181_register_types(void)
+{
+    type_register_static(&pl181_info);
+}
+
+type_init(pl181_register_types)
diff --git a/hw/sd/sd.c b/hw/sd/sd.c
new file mode 100644
index 0000000..66c4014
--- /dev/null
+++ b/hw/sd/sd.c
@@ -0,0 +1,1764 @@
+/*
+ * SD Memory Card emulation as defined in the "SD Memory Card Physical
+ * layer specification, Version 1.10."
+ *
+ * Copyright (c) 2006 Andrzej Zaborowski  <balrog@zabor.org>
+ * Copyright (c) 2007 CodeSourcery
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "hw/hw.h"
+#include "block/block.h"
+#include "hw/sd.h"
+#include "qemu/bitmap.h"
+
+//#define DEBUG_SD 1
+
+#ifdef DEBUG_SD
+#define DPRINTF(fmt, ...) \
+do { fprintf(stderr, "SD: " fmt , ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) do {} while(0)
+#endif
+
+typedef enum {
+    sd_r0 = 0,    /* no response */
+    sd_r1,        /* normal response command */
+    sd_r2_i,      /* CID register */
+    sd_r2_s,      /* CSD register */
+    sd_r3,        /* OCR register */
+    sd_r6 = 6,    /* Published RCA response */
+    sd_r7,        /* Operating voltage */
+    sd_r1b = -1,
+    sd_illegal = -2,
+} sd_rsp_type_t;
+
+enum SDCardModes {
+    sd_inactive,
+    sd_card_identification_mode,
+    sd_data_transfer_mode,
+};
+
+enum SDCardStates {
+    sd_inactive_state = -1,
+    sd_idle_state = 0,
+    sd_ready_state,
+    sd_identification_state,
+    sd_standby_state,
+    sd_transfer_state,
+    sd_sendingdata_state,
+    sd_receivingdata_state,
+    sd_programming_state,
+    sd_disconnect_state,
+};
+
+struct SDState {
+    uint32_t mode;    /* current card mode, one of SDCardModes */
+    int32_t state;    /* current card state, one of SDCardStates */
+    uint32_t ocr;
+    uint8_t scr[8];
+    uint8_t cid[16];
+    uint8_t csd[16];
+    uint16_t rca;
+    uint32_t card_status;
+    uint8_t sd_status[64];
+    uint32_t vhs;
+    bool wp_switch;
+    unsigned long *wp_groups;
+    int32_t wpgrps_size;
+    uint64_t size;
+    uint32_t blk_len;
+    uint32_t erase_start;
+    uint32_t erase_end;
+    uint8_t pwd[16];
+    uint32_t pwd_len;
+    uint8_t function_group[6];
+
+    bool spi;
+    uint8_t current_cmd;
+    /* True if we will handle the next command as an ACMD. Note that this does
+     * *not* track the APP_CMD status bit!
+     */
+    bool expecting_acmd;
+    uint32_t blk_written;
+    uint64_t data_start;
+    uint32_t data_offset;
+    uint8_t data[512];
+    qemu_irq readonly_cb;
+    qemu_irq inserted_cb;
+    BlockDriverState *bdrv;
+    uint8_t *buf;
+
+    bool enable;
+};
+
+static void sd_set_mode(SDState *sd)
+{
+    switch (sd->state) {
+    case sd_inactive_state:
+        sd->mode = sd_inactive;
+        break;
+
+    case sd_idle_state:
+    case sd_ready_state:
+    case sd_identification_state:
+        sd->mode = sd_card_identification_mode;
+        break;
+
+    case sd_standby_state:
+    case sd_transfer_state:
+    case sd_sendingdata_state:
+    case sd_receivingdata_state:
+    case sd_programming_state:
+    case sd_disconnect_state:
+        sd->mode = sd_data_transfer_mode;
+        break;
+    }
+}
+
+static const sd_cmd_type_t sd_cmd_type[64] = {
+    sd_bc,   sd_none, sd_bcr,  sd_bcr,  sd_none, sd_none, sd_none, sd_ac,
+    sd_bcr,  sd_ac,   sd_ac,   sd_adtc, sd_ac,   sd_ac,   sd_none, sd_ac,
+    sd_ac,   sd_adtc, sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none,
+    sd_adtc, sd_adtc, sd_adtc, sd_adtc, sd_ac,   sd_ac,   sd_adtc, sd_none,
+    sd_ac,   sd_ac,   sd_none, sd_none, sd_none, sd_none, sd_ac,   sd_none,
+    sd_none, sd_none, sd_bc,   sd_none, sd_none, sd_none, sd_none, sd_none,
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac,
+    sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
+};
+
+static const sd_cmd_type_t sd_acmd_type[64] = {
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac,   sd_none,
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none,
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_ac,
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
+    sd_none, sd_bcr,  sd_ac,   sd_none, sd_none, sd_none, sd_none, sd_none,
+    sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none, sd_none, sd_none,
+    sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
+};
+
+static const int sd_cmd_class[64] = {
+    0,  0,  0,  0,  0,  9, 10,  0,  0,  0,  0,  1,  0,  0,  0,  0,
+    2,  2,  2,  2,  3,  3,  3,  3,  4,  4,  4,  4,  6,  6,  6,  6,
+    5,  5, 10, 10, 10, 10,  5,  9,  9,  9,  7,  7,  7,  7,  7,  7,
+    7,  7, 10,  7,  9,  9,  9,  8,  8, 10,  8,  8,  8,  8,  8,  8,
+};
+
+static uint8_t sd_crc7(void *message, size_t width)
+{
+    int i, bit;
+    uint8_t shift_reg = 0x00;
+    uint8_t *msg = (uint8_t *) message;
+
+    for (i = 0; i < width; i ++, msg ++)
+        for (bit = 7; bit >= 0; bit --) {
+            shift_reg <<= 1;
+            if ((shift_reg >> 7) ^ ((*msg >> bit) & 1))
+                shift_reg ^= 0x89;
+        }
+
+    return shift_reg;
+}
+
+static uint16_t sd_crc16(void *message, size_t width)
+{
+    int i, bit;
+    uint16_t shift_reg = 0x0000;
+    uint16_t *msg = (uint16_t *) message;
+    width <<= 1;
+
+    for (i = 0; i < width; i ++, msg ++)
+        for (bit = 15; bit >= 0; bit --) {
+            shift_reg <<= 1;
+            if ((shift_reg >> 15) ^ ((*msg >> bit) & 1))
+                shift_reg ^= 0x1011;
+        }
+
+    return shift_reg;
+}
+
+static void sd_set_ocr(SDState *sd)
+{
+    /* All voltages OK, card power-up OK, Standard Capacity SD Memory Card */
+    sd->ocr = 0x80ffff00;
+}
+
+static void sd_set_scr(SDState *sd)
+{
+    sd->scr[0] = 0x00;		/* SCR Structure */
+    sd->scr[1] = 0x2f;		/* SD Security Support */
+    sd->scr[2] = 0x00;
+    sd->scr[3] = 0x00;
+    sd->scr[4] = 0x00;
+    sd->scr[5] = 0x00;
+    sd->scr[6] = 0x00;
+    sd->scr[7] = 0x00;
+}
+
+#define MID	0xaa
+#define OID	"XY"
+#define PNM	"QEMU!"
+#define PRV	0x01
+#define MDT_YR	2006
+#define MDT_MON	2
+
+static void sd_set_cid(SDState *sd)
+{
+    sd->cid[0] = MID;		/* Fake card manufacturer ID (MID) */
+    sd->cid[1] = OID[0];	/* OEM/Application ID (OID) */
+    sd->cid[2] = OID[1];
+    sd->cid[3] = PNM[0];	/* Fake product name (PNM) */
+    sd->cid[4] = PNM[1];
+    sd->cid[5] = PNM[2];
+    sd->cid[6] = PNM[3];
+    sd->cid[7] = PNM[4];
+    sd->cid[8] = PRV;		/* Fake product revision (PRV) */
+    sd->cid[9] = 0xde;		/* Fake serial number (PSN) */
+    sd->cid[10] = 0xad;
+    sd->cid[11] = 0xbe;
+    sd->cid[12] = 0xef;
+    sd->cid[13] = 0x00 |	/* Manufacture date (MDT) */
+        ((MDT_YR - 2000) / 10);
+    sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON;
+    sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
+}
+
+#define HWBLOCK_SHIFT	9			/* 512 bytes */
+#define SECTOR_SHIFT	5			/* 16 kilobytes */
+#define WPGROUP_SHIFT	7			/* 2 megs */
+#define CMULT_SHIFT	9			/* 512 times HWBLOCK_SIZE */
+#define WPGROUP_SIZE	(1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT))
+
+static const uint8_t sd_csd_rw_mask[16] = {
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe,
+};
+
+static void sd_set_csd(SDState *sd, uint64_t size)
+{
+    uint32_t csize = (size >> (CMULT_SHIFT + HWBLOCK_SHIFT)) - 1;
+    uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
+    uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
+
+    if (size <= 0x40000000) {	/* Standard Capacity SD */
+        sd->csd[0] = 0x00;	/* CSD structure */
+        sd->csd[1] = 0x26;	/* Data read access-time-1 */
+        sd->csd[2] = 0x00;	/* Data read access-time-2 */
+        sd->csd[3] = 0x5a;	/* Max. data transfer rate */
+        sd->csd[4] = 0x5f;	/* Card Command Classes */
+        sd->csd[5] = 0x50 |	/* Max. read data block length */
+            HWBLOCK_SHIFT;
+        sd->csd[6] = 0xe0 |	/* Partial block for read allowed */
+            ((csize >> 10) & 0x03);
+        sd->csd[7] = 0x00 |	/* Device size */
+            ((csize >> 2) & 0xff);
+        sd->csd[8] = 0x3f |	/* Max. read current */
+            ((csize << 6) & 0xc0);
+        sd->csd[9] = 0xfc |	/* Max. write current */
+            ((CMULT_SHIFT - 2) >> 1);
+        sd->csd[10] = 0x40 |	/* Erase sector size */
+            (((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1);
+        sd->csd[11] = 0x00 |	/* Write protect group size */
+            ((sectsize << 7) & 0x80) | wpsize;
+        sd->csd[12] = 0x90 |	/* Write speed factor */
+            (HWBLOCK_SHIFT >> 2);
+        sd->csd[13] = 0x20 |	/* Max. write data block length */
+            ((HWBLOCK_SHIFT << 6) & 0xc0);
+        sd->csd[14] = 0x00;	/* File format group */
+        sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
+    } else {			/* SDHC */
+        size /= 512 * 1024;
+        size -= 1;
+        sd->csd[0] = 0x40;
+        sd->csd[1] = 0x0e;
+        sd->csd[2] = 0x00;
+        sd->csd[3] = 0x32;
+        sd->csd[4] = 0x5b;
+        sd->csd[5] = 0x59;
+        sd->csd[6] = 0x00;
+        sd->csd[7] = (size >> 16) & 0xff;
+        sd->csd[8] = (size >> 8) & 0xff;
+        sd->csd[9] = (size & 0xff);
+        sd->csd[10] = 0x7f;
+        sd->csd[11] = 0x80;
+        sd->csd[12] = 0x0a;
+        sd->csd[13] = 0x40;
+        sd->csd[14] = 0x00;
+        sd->csd[15] = 0x00;
+        sd->ocr |= 1 << 30;	/* High Capacity SD Memort Card */
+    }
+}
+
+static void sd_set_rca(SDState *sd)
+{
+    sd->rca += 0x4567;
+}
+
+/* Card status bits, split by clear condition:
+ * A : According to the card current state
+ * B : Always related to the previous command
+ * C : Cleared by read
+ */
+#define CARD_STATUS_A	0x02004100
+#define CARD_STATUS_B	0x00c01e00
+#define CARD_STATUS_C	0xfd39a028
+
+static void sd_set_cardstatus(SDState *sd)
+{
+    sd->card_status = 0x00000100;
+}
+
+static void sd_set_sdstatus(SDState *sd)
+{
+    memset(sd->sd_status, 0, 64);
+}
+
+static int sd_req_crc_validate(SDRequest *req)
+{
+    uint8_t buffer[5];
+    buffer[0] = 0x40 | req->cmd;
+    buffer[1] = (req->arg >> 24) & 0xff;
+    buffer[2] = (req->arg >> 16) & 0xff;
+    buffer[3] = (req->arg >> 8) & 0xff;
+    buffer[4] = (req->arg >> 0) & 0xff;
+    return 0;
+    return sd_crc7(buffer, 5) != req->crc;	/* TODO */
+}
+
+static void sd_response_r1_make(SDState *sd, uint8_t *response)
+{
+    uint32_t status = sd->card_status;
+    /* Clear the "clear on read" status bits */
+    sd->card_status &= ~CARD_STATUS_C;
+
+    response[0] = (status >> 24) & 0xff;
+    response[1] = (status >> 16) & 0xff;
+    response[2] = (status >> 8) & 0xff;
+    response[3] = (status >> 0) & 0xff;
+}
+
+static void sd_response_r3_make(SDState *sd, uint8_t *response)
+{
+    response[0] = (sd->ocr >> 24) & 0xff;
+    response[1] = (sd->ocr >> 16) & 0xff;
+    response[2] = (sd->ocr >> 8) & 0xff;
+    response[3] = (sd->ocr >> 0) & 0xff;
+}
+
+static void sd_response_r6_make(SDState *sd, uint8_t *response)
+{
+    uint16_t arg;
+    uint16_t status;
+
+    arg = sd->rca;
+    status = ((sd->card_status >> 8) & 0xc000) |
+             ((sd->card_status >> 6) & 0x2000) |
+              (sd->card_status & 0x1fff);
+    sd->card_status &= ~(CARD_STATUS_C & 0xc81fff);
+
+    response[0] = (arg >> 8) & 0xff;
+    response[1] = arg & 0xff;
+    response[2] = (status >> 8) & 0xff;
+    response[3] = status & 0xff;
+}
+
+static void sd_response_r7_make(SDState *sd, uint8_t *response)
+{
+    response[0] = (sd->vhs >> 24) & 0xff;
+    response[1] = (sd->vhs >> 16) & 0xff;
+    response[2] = (sd->vhs >>  8) & 0xff;
+    response[3] = (sd->vhs >>  0) & 0xff;
+}
+
+static inline uint64_t sd_addr_to_wpnum(uint64_t addr)
+{
+    return addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
+}
+
+static void sd_reset(SDState *sd, BlockDriverState *bdrv)
+{
+    uint64_t size;
+    uint64_t sect;
+
+    if (bdrv) {
+        bdrv_get_geometry(bdrv, &sect);
+    } else {
+        sect = 0;
+    }
+    size = sect << 9;
+
+    sect = sd_addr_to_wpnum(size) + 1;
+
+    sd->state = sd_idle_state;
+    sd->rca = 0x0000;
+    sd_set_ocr(sd);
+    sd_set_scr(sd);
+    sd_set_cid(sd);
+    sd_set_csd(sd, size);
+    sd_set_cardstatus(sd);
+    sd_set_sdstatus(sd);
+
+    sd->bdrv = bdrv;
+
+    if (sd->wp_groups)
+        g_free(sd->wp_groups);
+    sd->wp_switch = bdrv ? bdrv_is_read_only(bdrv) : false;
+    sd->wpgrps_size = sect;
+    sd->wp_groups = bitmap_new(sd->wpgrps_size);
+    memset(sd->function_group, 0, sizeof(sd->function_group));
+    sd->erase_start = 0;
+    sd->erase_end = 0;
+    sd->size = size;
+    sd->blk_len = 0x200;
+    sd->pwd_len = 0;
+    sd->expecting_acmd = false;
+}
+
+static void sd_cardchange(void *opaque, bool load)
+{
+    SDState *sd = opaque;
+
+    qemu_set_irq(sd->inserted_cb, bdrv_is_inserted(sd->bdrv));
+    if (bdrv_is_inserted(sd->bdrv)) {
+        sd_reset(sd, sd->bdrv);
+        qemu_set_irq(sd->readonly_cb, sd->wp_switch);
+    }
+}
+
+static const BlockDevOps sd_block_ops = {
+    .change_media_cb = sd_cardchange,
+};
+
+static const VMStateDescription sd_vmstate = {
+    .name = "sd-card",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT32(mode, SDState),
+        VMSTATE_INT32(state, SDState),
+        VMSTATE_UINT8_ARRAY(cid, SDState, 16),
+        VMSTATE_UINT8_ARRAY(csd, SDState, 16),
+        VMSTATE_UINT16(rca, SDState),
+        VMSTATE_UINT32(card_status, SDState),
+        VMSTATE_PARTIAL_BUFFER(sd_status, SDState, 1),
+        VMSTATE_UINT32(vhs, SDState),
+        VMSTATE_BITMAP(wp_groups, SDState, 0, wpgrps_size),
+        VMSTATE_UINT32(blk_len, SDState),
+        VMSTATE_UINT32(erase_start, SDState),
+        VMSTATE_UINT32(erase_end, SDState),
+        VMSTATE_UINT8_ARRAY(pwd, SDState, 16),
+        VMSTATE_UINT32(pwd_len, SDState),
+        VMSTATE_UINT8_ARRAY(function_group, SDState, 6),
+        VMSTATE_UINT8(current_cmd, SDState),
+        VMSTATE_BOOL(expecting_acmd, SDState),
+        VMSTATE_UINT32(blk_written, SDState),
+        VMSTATE_UINT64(data_start, SDState),
+        VMSTATE_UINT32(data_offset, SDState),
+        VMSTATE_UINT8_ARRAY(data, SDState, 512),
+        VMSTATE_BUFFER_POINTER_UNSAFE(buf, SDState, 1, 512),
+        VMSTATE_BOOL(enable, SDState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+/* We do not model the chip select pin, so allow the board to select
+   whether card should be in SSI or MMC/SD mode.  It is also up to the
+   board to ensure that ssi transfers only occur when the chip select
+   is asserted.  */
+SDState *sd_init(BlockDriverState *bs, bool is_spi)
+{
+    SDState *sd;
+
+    sd = (SDState *) g_malloc0(sizeof(SDState));
+    sd->buf = qemu_blockalign(bs, 512);
+    sd->spi = is_spi;
+    sd->enable = true;
+    sd_reset(sd, bs);
+    if (sd->bdrv) {
+        bdrv_attach_dev_nofail(sd->bdrv, sd);
+        bdrv_set_dev_ops(sd->bdrv, &sd_block_ops, sd);
+    }
+    vmstate_register(NULL, -1, &sd_vmstate, sd);
+    return sd;
+}
+
+void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
+{
+    sd->readonly_cb = readonly;
+    sd->inserted_cb = insert;
+    qemu_set_irq(readonly, sd->bdrv ? bdrv_is_read_only(sd->bdrv) : 0);
+    qemu_set_irq(insert, sd->bdrv ? bdrv_is_inserted(sd->bdrv) : 0);
+}
+
+static void sd_erase(SDState *sd)
+{
+    int i;
+    uint64_t erase_start = sd->erase_start;
+    uint64_t erase_end = sd->erase_end;
+
+    if (!sd->erase_start || !sd->erase_end) {
+        sd->card_status |= ERASE_SEQ_ERROR;
+        return;
+    }
+
+    if (extract32(sd->ocr, OCR_CCS_BITN, 1)) {
+        /* High capacity memory card: erase units are 512 byte blocks */
+        erase_start *= 512;
+        erase_end *= 512;
+    }
+
+    erase_start = sd_addr_to_wpnum(erase_start);
+    erase_end = sd_addr_to_wpnum(erase_end);
+    sd->erase_start = 0;
+    sd->erase_end = 0;
+    sd->csd[14] |= 0x40;
+
+    for (i = erase_start; i <= erase_end; i++) {
+        if (test_bit(i, sd->wp_groups)) {
+            sd->card_status |= WP_ERASE_SKIP;
+        }
+    }
+}
+
+static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
+{
+    uint32_t i, wpnum;
+    uint32_t ret = 0;
+
+    wpnum = sd_addr_to_wpnum(addr);
+
+    for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) {
+        if (addr < sd->size && test_bit(wpnum, sd->wp_groups)) {
+            ret |= (1 << i);
+        }
+    }
+
+    return ret;
+}
+
+static void sd_function_switch(SDState *sd, uint32_t arg)
+{
+    int i, mode, new_func, crc;
+    mode = !!(arg & 0x80000000);
+
+    sd->data[0] = 0x00;		/* Maximum current consumption */
+    sd->data[1] = 0x01;
+    sd->data[2] = 0x80;		/* Supported group 6 functions */
+    sd->data[3] = 0x01;
+    sd->data[4] = 0x80;		/* Supported group 5 functions */
+    sd->data[5] = 0x01;
+    sd->data[6] = 0x80;		/* Supported group 4 functions */
+    sd->data[7] = 0x01;
+    sd->data[8] = 0x80;		/* Supported group 3 functions */
+    sd->data[9] = 0x01;
+    sd->data[10] = 0x80;	/* Supported group 2 functions */
+    sd->data[11] = 0x43;
+    sd->data[12] = 0x80;	/* Supported group 1 functions */
+    sd->data[13] = 0x03;
+    for (i = 0; i < 6; i ++) {
+        new_func = (arg >> (i * 4)) & 0x0f;
+        if (mode && new_func != 0x0f)
+            sd->function_group[i] = new_func;
+        sd->data[14 + (i >> 1)] = new_func << ((i * 4) & 4);
+    }
+    memset(&sd->data[17], 0, 47);
+    crc = sd_crc16(sd->data, 64);
+    sd->data[65] = crc >> 8;
+    sd->data[66] = crc & 0xff;
+}
+
+static inline bool sd_wp_addr(SDState *sd, uint64_t addr)
+{
+    return test_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
+}
+
+static void sd_lock_command(SDState *sd)
+{
+    int erase, lock, clr_pwd, set_pwd, pwd_len;
+    erase = !!(sd->data[0] & 0x08);
+    lock = sd->data[0] & 0x04;
+    clr_pwd = sd->data[0] & 0x02;
+    set_pwd = sd->data[0] & 0x01;
+
+    if (sd->blk_len > 1)
+        pwd_len = sd->data[1];
+    else
+        pwd_len = 0;
+
+    if (erase) {
+        if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 ||
+                        set_pwd || clr_pwd || lock || sd->wp_switch ||
+                        (sd->csd[14] & 0x20)) {
+            sd->card_status |= LOCK_UNLOCK_FAILED;
+            return;
+        }
+        bitmap_zero(sd->wp_groups, sd->wpgrps_size);
+        sd->csd[14] &= ~0x10;
+        sd->card_status &= ~CARD_IS_LOCKED;
+        sd->pwd_len = 0;
+        /* Erasing the entire card here! */
+        fprintf(stderr, "SD: Card force-erased by CMD42\n");
+        return;
+    }
+
+    if (sd->blk_len < 2 + pwd_len ||
+                    pwd_len <= sd->pwd_len ||
+                    pwd_len > sd->pwd_len + 16) {
+        sd->card_status |= LOCK_UNLOCK_FAILED;
+        return;
+    }
+
+    if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) {
+        sd->card_status |= LOCK_UNLOCK_FAILED;
+        return;
+    }
+
+    pwd_len -= sd->pwd_len;
+    if ((pwd_len && !set_pwd) ||
+                    (clr_pwd && (set_pwd || lock)) ||
+                    (lock && !sd->pwd_len && !set_pwd) ||
+                    (!set_pwd && !clr_pwd &&
+                     (((sd->card_status & CARD_IS_LOCKED) && lock) ||
+                      (!(sd->card_status & CARD_IS_LOCKED) && !lock)))) {
+        sd->card_status |= LOCK_UNLOCK_FAILED;
+        return;
+    }
+
+    if (set_pwd) {
+        memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len);
+        sd->pwd_len = pwd_len;
+    }
+
+    if (clr_pwd) {
+        sd->pwd_len = 0;
+    }
+
+    if (lock)
+        sd->card_status |= CARD_IS_LOCKED;
+    else
+        sd->card_status &= ~CARD_IS_LOCKED;
+}
+
+static sd_rsp_type_t sd_normal_command(SDState *sd,
+                                       SDRequest req)
+{
+    uint32_t rca = 0x0000;
+    uint64_t addr = (sd->ocr & (1 << 30)) ? (uint64_t) req.arg << 9 : req.arg;
+
+    /* Not interpreting this as an app command */
+    sd->card_status &= ~APP_CMD;
+
+    if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
+        rca = req.arg >> 16;
+
+    DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state);
+    switch (req.cmd) {
+    /* Basic commands (Class 0 and Class 1) */
+    case 0:	/* CMD0:   GO_IDLE_STATE */
+        switch (sd->state) {
+        case sd_inactive_state:
+            return sd->spi ? sd_r1 : sd_r0;
+
+        default:
+            sd->state = sd_idle_state;
+            sd_reset(sd, sd->bdrv);
+            return sd->spi ? sd_r1 : sd_r0;
+        }
+        break;
+
+    case 1:	/* CMD1:   SEND_OP_CMD */
+        if (!sd->spi)
+            goto bad_cmd;
+
+        sd->state = sd_transfer_state;
+        return sd_r1;
+
+    case 2:	/* CMD2:   ALL_SEND_CID */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->state) {
+        case sd_ready_state:
+            sd->state = sd_identification_state;
+            return sd_r2_i;
+
+        default:
+            break;
+        }
+        break;
+
+    case 3:	/* CMD3:   SEND_RELATIVE_ADDR */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->state) {
+        case sd_identification_state:
+        case sd_standby_state:
+            sd->state = sd_standby_state;
+            sd_set_rca(sd);
+            return sd_r6;
+
+        default:
+            break;
+        }
+        break;
+
+    case 4:	/* CMD4:   SEND_DSR */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->state) {
+        case sd_standby_state:
+            break;
+
+        default:
+            break;
+        }
+        break;
+
+    case 5: /* CMD5: reserved for SDIO cards */
+        return sd_illegal;
+
+    case 6:	/* CMD6:   SWITCH_FUNCTION */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->mode) {
+        case sd_data_transfer_mode:
+            sd_function_switch(sd, req.arg);
+            sd->state = sd_sendingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 7:	/* CMD7:   SELECT/DESELECT_CARD */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->state) {
+        case sd_standby_state:
+            if (sd->rca != rca)
+                return sd_r0;
+
+            sd->state = sd_transfer_state;
+            return sd_r1b;
+
+        case sd_transfer_state:
+        case sd_sendingdata_state:
+            if (sd->rca == rca)
+                break;
+
+            sd->state = sd_standby_state;
+            return sd_r1b;
+
+        case sd_disconnect_state:
+            if (sd->rca != rca)
+                return sd_r0;
+
+            sd->state = sd_programming_state;
+            return sd_r1b;
+
+        case sd_programming_state:
+            if (sd->rca == rca)
+                break;
+
+            sd->state = sd_disconnect_state;
+            return sd_r1b;
+
+        default:
+            break;
+        }
+        break;
+
+    case 8:	/* CMD8:   SEND_IF_COND */
+        /* Physical Layer Specification Version 2.00 command */
+        switch (sd->state) {
+        case sd_idle_state:
+            sd->vhs = 0;
+
+            /* No response if not exactly one VHS bit is set.  */
+            if (!(req.arg >> 8) || (req.arg >> ffs(req.arg & ~0xff)))
+                return sd->spi ? sd_r7 : sd_r0;
+
+            /* Accept.  */
+            sd->vhs = req.arg;
+            return sd_r7;
+
+        default:
+            break;
+        }
+        break;
+
+    case 9:	/* CMD9:   SEND_CSD */
+        switch (sd->state) {
+        case sd_standby_state:
+            if (sd->rca != rca)
+                return sd_r0;
+
+            return sd_r2_s;
+
+        case sd_transfer_state:
+            if (!sd->spi)
+                break;
+            sd->state = sd_sendingdata_state;
+            memcpy(sd->data, sd->csd, 16);
+            sd->data_start = addr;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 10:	/* CMD10:  SEND_CID */
+        switch (sd->state) {
+        case sd_standby_state:
+            if (sd->rca != rca)
+                return sd_r0;
+
+            return sd_r2_i;
+
+        case sd_transfer_state:
+            if (!sd->spi)
+                break;
+            sd->state = sd_sendingdata_state;
+            memcpy(sd->data, sd->cid, 16);
+            sd->data_start = addr;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 11:	/* CMD11:  READ_DAT_UNTIL_STOP */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_sendingdata_state;
+            sd->data_start = req.arg;
+            sd->data_offset = 0;
+
+            if (sd->data_start + sd->blk_len > sd->size)
+                sd->card_status |= ADDRESS_ERROR;
+            return sd_r0;
+
+        default:
+            break;
+        }
+        break;
+
+    case 12:	/* CMD12:  STOP_TRANSMISSION */
+        switch (sd->state) {
+        case sd_sendingdata_state:
+            sd->state = sd_transfer_state;
+            return sd_r1b;
+
+        case sd_receivingdata_state:
+            sd->state = sd_programming_state;
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+            return sd_r1b;
+
+        default:
+            break;
+        }
+        break;
+
+    case 13:	/* CMD13:  SEND_STATUS */
+        switch (sd->mode) {
+        case sd_data_transfer_mode:
+            if (sd->rca != rca)
+                return sd_r0;
+
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 15:	/* CMD15:  GO_INACTIVE_STATE */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->mode) {
+        case sd_data_transfer_mode:
+            if (sd->rca != rca)
+                return sd_r0;
+
+            sd->state = sd_inactive_state;
+            return sd_r0;
+
+        default:
+            break;
+        }
+        break;
+
+    /* Block read commands (Classs 2) */
+    case 16:	/* CMD16:  SET_BLOCKLEN */
+        switch (sd->state) {
+        case sd_transfer_state:
+            if (req.arg > (1 << HWBLOCK_SHIFT))
+                sd->card_status |= BLOCK_LEN_ERROR;
+            else
+                sd->blk_len = req.arg;
+
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 17:	/* CMD17:  READ_SINGLE_BLOCK */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_sendingdata_state;
+            sd->data_start = addr;
+            sd->data_offset = 0;
+
+            if (sd->data_start + sd->blk_len > sd->size)
+                sd->card_status |= ADDRESS_ERROR;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 18:	/* CMD18:  READ_MULTIPLE_BLOCK */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_sendingdata_state;
+            sd->data_start = addr;
+            sd->data_offset = 0;
+
+            if (sd->data_start + sd->blk_len > sd->size)
+                sd->card_status |= ADDRESS_ERROR;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    /* Block write commands (Class 4) */
+    case 24:	/* CMD24:  WRITE_SINGLE_BLOCK */
+        if (sd->spi)
+            goto unimplemented_cmd;
+        switch (sd->state) {
+        case sd_transfer_state:
+            /* Writing in SPI mode not implemented.  */
+            if (sd->spi)
+                break;
+            sd->state = sd_receivingdata_state;
+            sd->data_start = addr;
+            sd->data_offset = 0;
+            sd->blk_written = 0;
+
+            if (sd->data_start + sd->blk_len > sd->size)
+                sd->card_status |= ADDRESS_ERROR;
+            if (sd_wp_addr(sd, sd->data_start))
+                sd->card_status |= WP_VIOLATION;
+            if (sd->csd[14] & 0x30)
+                sd->card_status |= WP_VIOLATION;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 25:	/* CMD25:  WRITE_MULTIPLE_BLOCK */
+        if (sd->spi)
+            goto unimplemented_cmd;
+        switch (sd->state) {
+        case sd_transfer_state:
+            /* Writing in SPI mode not implemented.  */
+            if (sd->spi)
+                break;
+            sd->state = sd_receivingdata_state;
+            sd->data_start = addr;
+            sd->data_offset = 0;
+            sd->blk_written = 0;
+
+            if (sd->data_start + sd->blk_len > sd->size)
+                sd->card_status |= ADDRESS_ERROR;
+            if (sd_wp_addr(sd, sd->data_start))
+                sd->card_status |= WP_VIOLATION;
+            if (sd->csd[14] & 0x30)
+                sd->card_status |= WP_VIOLATION;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 26:	/* CMD26:  PROGRAM_CID */
+        if (sd->spi)
+            goto bad_cmd;
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_receivingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 27:	/* CMD27:  PROGRAM_CSD */
+        if (sd->spi)
+            goto unimplemented_cmd;
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_receivingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    /* Write protection (Class 6) */
+    case 28:	/* CMD28:  SET_WRITE_PROT */
+        switch (sd->state) {
+        case sd_transfer_state:
+            if (addr >= sd->size) {
+                sd->card_status |= ADDRESS_ERROR;
+                return sd_r1b;
+            }
+
+            sd->state = sd_programming_state;
+            set_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+            return sd_r1b;
+
+        default:
+            break;
+        }
+        break;
+
+    case 29:	/* CMD29:  CLR_WRITE_PROT */
+        switch (sd->state) {
+        case sd_transfer_state:
+            if (addr >= sd->size) {
+                sd->card_status |= ADDRESS_ERROR;
+                return sd_r1b;
+            }
+
+            sd->state = sd_programming_state;
+            clear_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+            return sd_r1b;
+
+        default:
+            break;
+        }
+        break;
+
+    case 30:	/* CMD30:  SEND_WRITE_PROT */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_sendingdata_state;
+            *(uint32_t *) sd->data = sd_wpbits(sd, req.arg);
+            sd->data_start = addr;
+            sd->data_offset = 0;
+            return sd_r1b;
+
+        default:
+            break;
+        }
+        break;
+
+    /* Erase commands (Class 5) */
+    case 32:	/* CMD32:  ERASE_WR_BLK_START */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->erase_start = req.arg;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 33:	/* CMD33:  ERASE_WR_BLK_END */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->erase_end = req.arg;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 38:	/* CMD38:  ERASE */
+        switch (sd->state) {
+        case sd_transfer_state:
+            if (sd->csd[14] & 0x30) {
+                sd->card_status |= WP_VIOLATION;
+                return sd_r1b;
+            }
+
+            sd->state = sd_programming_state;
+            sd_erase(sd);
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+            return sd_r1b;
+
+        default:
+            break;
+        }
+        break;
+
+    /* Lock card commands (Class 7) */
+    case 42:	/* CMD42:  LOCK_UNLOCK */
+        if (sd->spi)
+            goto unimplemented_cmd;
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_receivingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 52:
+    case 53:
+        /* CMD52, CMD53: reserved for SDIO cards
+         * (see the SDIO Simplified Specification V2.0)
+         * Handle as illegal command but do not complain
+         * on stderr, as some OSes may use these in their
+         * probing for presence of an SDIO card.
+         */
+        return sd_illegal;
+
+    /* Application specific commands (Class 8) */
+    case 55:	/* CMD55:  APP_CMD */
+        if (sd->rca != rca)
+            return sd_r0;
+
+        sd->expecting_acmd = true;
+        sd->card_status |= APP_CMD;
+        return sd_r1;
+
+    case 56:	/* CMD56:  GEN_CMD */
+        fprintf(stderr, "SD: GEN_CMD 0x%08x\n", req.arg);
+
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->data_offset = 0;
+            if (req.arg & 1)
+                sd->state = sd_sendingdata_state;
+            else
+                sd->state = sd_receivingdata_state;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    default:
+    bad_cmd:
+        fprintf(stderr, "SD: Unknown CMD%i\n", req.cmd);
+        return sd_illegal;
+
+    unimplemented_cmd:
+        /* Commands that are recognised but not yet implemented in SPI mode.  */
+        fprintf(stderr, "SD: CMD%i not implemented in SPI mode\n", req.cmd);
+        return sd_illegal;
+    }
+
+    fprintf(stderr, "SD: CMD%i in a wrong state\n", req.cmd);
+    return sd_illegal;
+}
+
+static sd_rsp_type_t sd_app_command(SDState *sd,
+                                    SDRequest req)
+{
+    DPRINTF("ACMD%d 0x%08x\n", req.cmd, req.arg);
+    sd->card_status |= APP_CMD;
+    switch (req.cmd) {
+    case 6:	/* ACMD6:  SET_BUS_WIDTH */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->sd_status[0] &= 0x3f;
+            sd->sd_status[0] |= (req.arg & 0x03) << 6;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 13:	/* ACMD13: SD_STATUS */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_sendingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 22:	/* ACMD22: SEND_NUM_WR_BLOCKS */
+        switch (sd->state) {
+        case sd_transfer_state:
+            *(uint32_t *) sd->data = sd->blk_written;
+
+            sd->state = sd_sendingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 23:	/* ACMD23: SET_WR_BLK_ERASE_COUNT */
+        switch (sd->state) {
+        case sd_transfer_state:
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 41:	/* ACMD41: SD_APP_OP_COND */
+        if (sd->spi) {
+            /* SEND_OP_CMD */
+            sd->state = sd_transfer_state;
+            return sd_r1;
+        }
+        switch (sd->state) {
+        case sd_idle_state:
+            /* We accept any voltage.  10000 V is nothing.  */
+            if (req.arg)
+                sd->state = sd_ready_state;
+
+            return sd_r3;
+
+        default:
+            break;
+        }
+        break;
+
+    case 42:	/* ACMD42: SET_CLR_CARD_DETECT */
+        switch (sd->state) {
+        case sd_transfer_state:
+            /* Bringing in the 50KOhm pull-up resistor... Done.  */
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    case 51:	/* ACMD51: SEND_SCR */
+        switch (sd->state) {
+        case sd_transfer_state:
+            sd->state = sd_sendingdata_state;
+            sd->data_start = 0;
+            sd->data_offset = 0;
+            return sd_r1;
+
+        default:
+            break;
+        }
+        break;
+
+    default:
+        /* Fall back to standard commands.  */
+        return sd_normal_command(sd, req);
+    }
+
+    fprintf(stderr, "SD: ACMD%i in a wrong state\n", req.cmd);
+    return sd_illegal;
+}
+
+static int cmd_valid_while_locked(SDState *sd, SDRequest *req)
+{
+    /* Valid commands in locked state:
+     * basic class (0)
+     * lock card class (7)
+     * CMD16
+     * implicitly, the ACMD prefix CMD55
+     * ACMD41 and ACMD42
+     * Anything else provokes an "illegal command" response.
+     */
+    if (sd->expecting_acmd) {
+        return req->cmd == 41 || req->cmd == 42;
+    }
+    if (req->cmd == 16 || req->cmd == 55) {
+        return 1;
+    }
+    return sd_cmd_class[req->cmd] == 0 || sd_cmd_class[req->cmd] == 7;
+}
+
+int sd_do_command(SDState *sd, SDRequest *req,
+                  uint8_t *response) {
+    int last_state;
+    sd_rsp_type_t rtype;
+    int rsplen;
+
+    if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable) {
+        return 0;
+    }
+
+    if (sd_req_crc_validate(req)) {
+        sd->card_status |= COM_CRC_ERROR;
+        rtype = sd_illegal;
+        goto send_response;
+    }
+
+    if (sd->card_status & CARD_IS_LOCKED) {
+        if (!cmd_valid_while_locked(sd, req)) {
+            sd->card_status |= ILLEGAL_COMMAND;
+            sd->expecting_acmd = false;
+            fprintf(stderr, "SD: Card is locked\n");
+            rtype = sd_illegal;
+            goto send_response;
+        }
+    }
+
+    last_state = sd->state;
+    sd_set_mode(sd);
+
+    if (sd->expecting_acmd) {
+        sd->expecting_acmd = false;
+        rtype = sd_app_command(sd, *req);
+    } else {
+        rtype = sd_normal_command(sd, *req);
+    }
+
+    if (rtype == sd_illegal) {
+        sd->card_status |= ILLEGAL_COMMAND;
+    } else {
+        /* Valid command, we can update the 'state before command' bits.
+         * (Do this now so they appear in r1 responses.)
+         */
+        sd->current_cmd = req->cmd;
+        sd->card_status &= ~CURRENT_STATE;
+        sd->card_status |= (last_state << 9);
+    }
+
+send_response:
+    switch (rtype) {
+    case sd_r1:
+    case sd_r1b:
+        sd_response_r1_make(sd, response);
+        rsplen = 4;
+        break;
+
+    case sd_r2_i:
+        memcpy(response, sd->cid, sizeof(sd->cid));
+        rsplen = 16;
+        break;
+
+    case sd_r2_s:
+        memcpy(response, sd->csd, sizeof(sd->csd));
+        rsplen = 16;
+        break;
+
+    case sd_r3:
+        sd_response_r3_make(sd, response);
+        rsplen = 4;
+        break;
+
+    case sd_r6:
+        sd_response_r6_make(sd, response);
+        rsplen = 4;
+        break;
+
+    case sd_r7:
+        sd_response_r7_make(sd, response);
+        rsplen = 4;
+        break;
+
+    case sd_r0:
+    case sd_illegal:
+    default:
+        rsplen = 0;
+        break;
+    }
+
+    if (rtype != sd_illegal) {
+        /* Clear the "clear on valid command" status bits now we've
+         * sent any response
+         */
+        sd->card_status &= ~CARD_STATUS_B;
+    }
+
+#ifdef DEBUG_SD
+    if (rsplen) {
+        int i;
+        DPRINTF("Response:");
+        for (i = 0; i < rsplen; i++)
+            fprintf(stderr, " %02x", response[i]);
+        fprintf(stderr, " state %d\n", sd->state);
+    } else {
+        DPRINTF("No response %d\n", sd->state);
+    }
+#endif
+
+    return rsplen;
+}
+
+static void sd_blk_read(SDState *sd, uint64_t addr, uint32_t len)
+{
+    uint64_t end = addr + len;
+
+    DPRINTF("sd_blk_read: addr = 0x%08llx, len = %d\n",
+            (unsigned long long) addr, len);
+    if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
+        fprintf(stderr, "sd_blk_read: read error on host side\n");
+        return;
+    }
+
+    if (end > (addr & ~511) + 512) {
+        memcpy(sd->data, sd->buf + (addr & 511), 512 - (addr & 511));
+
+        if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) < 0) {
+            fprintf(stderr, "sd_blk_read: read error on host side\n");
+            return;
+        }
+        memcpy(sd->data + 512 - (addr & 511), sd->buf, end & 511);
+    } else
+        memcpy(sd->data, sd->buf + (addr & 511), len);
+}
+
+static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len)
+{
+    uint64_t end = addr + len;
+
+    if ((addr & 511) || len < 512)
+        if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
+            fprintf(stderr, "sd_blk_write: read error on host side\n");
+            return;
+        }
+
+    if (end > (addr & ~511) + 512) {
+        memcpy(sd->buf + (addr & 511), sd->data, 512 - (addr & 511));
+        if (bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
+            fprintf(stderr, "sd_blk_write: write error on host side\n");
+            return;
+        }
+
+        if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) < 0) {
+            fprintf(stderr, "sd_blk_write: read error on host side\n");
+            return;
+        }
+        memcpy(sd->buf, sd->data + 512 - (addr & 511), end & 511);
+        if (bdrv_write(sd->bdrv, end >> 9, sd->buf, 1) < 0) {
+            fprintf(stderr, "sd_blk_write: write error on host side\n");
+        }
+    } else {
+        memcpy(sd->buf + (addr & 511), sd->data, len);
+        if (!sd->bdrv || bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
+            fprintf(stderr, "sd_blk_write: write error on host side\n");
+        }
+    }
+}
+
+#define BLK_READ_BLOCK(a, len)	sd_blk_read(sd, a, len)
+#define BLK_WRITE_BLOCK(a, len)	sd_blk_write(sd, a, len)
+#define APP_READ_BLOCK(a, len)	memset(sd->data, 0xec, len)
+#define APP_WRITE_BLOCK(a, len)
+
+void sd_write_data(SDState *sd, uint8_t value)
+{
+    int i;
+
+    if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
+        return;
+
+    if (sd->state != sd_receivingdata_state) {
+        fprintf(stderr, "sd_write_data: not in Receiving-Data state\n");
+        return;
+    }
+
+    if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
+        return;
+
+    switch (sd->current_cmd) {
+    case 24:	/* CMD24:  WRITE_SINGLE_BLOCK */
+        sd->data[sd->data_offset ++] = value;
+        if (sd->data_offset >= sd->blk_len) {
+            /* TODO: Check CRC before committing */
+            sd->state = sd_programming_state;
+            BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
+            sd->blk_written ++;
+            sd->csd[14] |= 0x40;
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+        }
+        break;
+
+    case 25:	/* CMD25:  WRITE_MULTIPLE_BLOCK */
+        if (sd->data_offset == 0) {
+            /* Start of the block - lets check the address is valid */
+            if (sd->data_start + sd->blk_len > sd->size) {
+                sd->card_status |= ADDRESS_ERROR;
+                break;
+            }
+            if (sd_wp_addr(sd, sd->data_start)) {
+                sd->card_status |= WP_VIOLATION;
+                break;
+            }
+        }
+        sd->data[sd->data_offset++] = value;
+        if (sd->data_offset >= sd->blk_len) {
+            /* TODO: Check CRC before committing */
+            sd->state = sd_programming_state;
+            BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
+            sd->blk_written++;
+            sd->data_start += sd->blk_len;
+            sd->data_offset = 0;
+            sd->csd[14] |= 0x40;
+
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_receivingdata_state;
+        }
+        break;
+
+    case 26:	/* CMD26:  PROGRAM_CID */
+        sd->data[sd->data_offset ++] = value;
+        if (sd->data_offset >= sizeof(sd->cid)) {
+            /* TODO: Check CRC before committing */
+            sd->state = sd_programming_state;
+            for (i = 0; i < sizeof(sd->cid); i ++)
+                if ((sd->cid[i] | 0x00) != sd->data[i])
+                    sd->card_status |= CID_CSD_OVERWRITE;
+
+            if (!(sd->card_status & CID_CSD_OVERWRITE))
+                for (i = 0; i < sizeof(sd->cid); i ++) {
+                    sd->cid[i] |= 0x00;
+                    sd->cid[i] &= sd->data[i];
+                }
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+        }
+        break;
+
+    case 27:	/* CMD27:  PROGRAM_CSD */
+        sd->data[sd->data_offset ++] = value;
+        if (sd->data_offset >= sizeof(sd->csd)) {
+            /* TODO: Check CRC before committing */
+            sd->state = sd_programming_state;
+            for (i = 0; i < sizeof(sd->csd); i ++)
+                if ((sd->csd[i] | sd_csd_rw_mask[i]) !=
+                    (sd->data[i] | sd_csd_rw_mask[i]))
+                    sd->card_status |= CID_CSD_OVERWRITE;
+
+            /* Copy flag (OTP) & Permanent write protect */
+            if (sd->csd[14] & ~sd->data[14] & 0x60)
+                sd->card_status |= CID_CSD_OVERWRITE;
+
+            if (!(sd->card_status & CID_CSD_OVERWRITE))
+                for (i = 0; i < sizeof(sd->csd); i ++) {
+                    sd->csd[i] |= sd_csd_rw_mask[i];
+                    sd->csd[i] &= sd->data[i];
+                }
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+        }
+        break;
+
+    case 42:	/* CMD42:  LOCK_UNLOCK */
+        sd->data[sd->data_offset ++] = value;
+        if (sd->data_offset >= sd->blk_len) {
+            /* TODO: Check CRC before committing */
+            sd->state = sd_programming_state;
+            sd_lock_command(sd);
+            /* Bzzzzzzztt .... Operation complete.  */
+            sd->state = sd_transfer_state;
+        }
+        break;
+
+    case 56:	/* CMD56:  GEN_CMD */
+        sd->data[sd->data_offset ++] = value;
+        if (sd->data_offset >= sd->blk_len) {
+            APP_WRITE_BLOCK(sd->data_start, sd->data_offset);
+            sd->state = sd_transfer_state;
+        }
+        break;
+
+    default:
+        fprintf(stderr, "sd_write_data: unknown command\n");
+        break;
+    }
+}
+
+uint8_t sd_read_data(SDState *sd)
+{
+    /* TODO: Append CRCs */
+    uint8_t ret;
+    int io_len;
+
+    if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
+        return 0x00;
+
+    if (sd->state != sd_sendingdata_state) {
+        fprintf(stderr, "sd_read_data: not in Sending-Data state\n");
+        return 0x00;
+    }
+
+    if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
+        return 0x00;
+
+    io_len = (sd->ocr & (1 << 30)) ? 512 : sd->blk_len;
+
+    switch (sd->current_cmd) {
+    case 6:	/* CMD6:   SWITCH_FUNCTION */
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= 64)
+            sd->state = sd_transfer_state;
+        break;
+
+    case 9:	/* CMD9:   SEND_CSD */
+    case 10:	/* CMD10:  SEND_CID */
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= 16)
+            sd->state = sd_transfer_state;
+        break;
+
+    case 11:	/* CMD11:  READ_DAT_UNTIL_STOP */
+        if (sd->data_offset == 0)
+            BLK_READ_BLOCK(sd->data_start, io_len);
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= io_len) {
+            sd->data_start += io_len;
+            sd->data_offset = 0;
+            if (sd->data_start + io_len > sd->size) {
+                sd->card_status |= ADDRESS_ERROR;
+                break;
+            }
+        }
+        break;
+
+    case 13:	/* ACMD13: SD_STATUS */
+        ret = sd->sd_status[sd->data_offset ++];
+
+        if (sd->data_offset >= sizeof(sd->sd_status))
+            sd->state = sd_transfer_state;
+        break;
+
+    case 17:	/* CMD17:  READ_SINGLE_BLOCK */
+        if (sd->data_offset == 0)
+            BLK_READ_BLOCK(sd->data_start, io_len);
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= io_len)
+            sd->state = sd_transfer_state;
+        break;
+
+    case 18:	/* CMD18:  READ_MULTIPLE_BLOCK */
+        if (sd->data_offset == 0)
+            BLK_READ_BLOCK(sd->data_start, io_len);
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= io_len) {
+            sd->data_start += io_len;
+            sd->data_offset = 0;
+            if (sd->data_start + io_len > sd->size) {
+                sd->card_status |= ADDRESS_ERROR;
+                break;
+            }
+        }
+        break;
+
+    case 22:	/* ACMD22: SEND_NUM_WR_BLOCKS */
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= 4)
+            sd->state = sd_transfer_state;
+        break;
+
+    case 30:	/* CMD30:  SEND_WRITE_PROT */
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= 4)
+            sd->state = sd_transfer_state;
+        break;
+
+    case 51:	/* ACMD51: SEND_SCR */
+        ret = sd->scr[sd->data_offset ++];
+
+        if (sd->data_offset >= sizeof(sd->scr))
+            sd->state = sd_transfer_state;
+        break;
+
+    case 56:	/* CMD56:  GEN_CMD */
+        if (sd->data_offset == 0)
+            APP_READ_BLOCK(sd->data_start, sd->blk_len);
+        ret = sd->data[sd->data_offset ++];
+
+        if (sd->data_offset >= sd->blk_len)
+            sd->state = sd_transfer_state;
+        break;
+
+    default:
+        fprintf(stderr, "sd_read_data: unknown command\n");
+        return 0x00;
+    }
+
+    return ret;
+}
+
+bool sd_data_ready(SDState *sd)
+{
+    return sd->state == sd_sendingdata_state;
+}
+
+void sd_enable(SDState *sd, bool enable)
+{
+    sd->enable = enable;
+}
diff --git a/hw/sd/sdhci.c b/hw/sd/sdhci.c
new file mode 100644
index 0000000..4a29e6c
--- /dev/null
+++ b/hw/sd/sdhci.c
@@ -0,0 +1,1300 @@
+/*
+ * SD Association Host Standard Specification v2.0 controller emulation
+ *
+ * Copyright (c) 2011 Samsung Electronics Co., Ltd.
+ * Mitsyanko Igor <i.mitsyanko@samsung.com>
+ * Peter A.G. Crosthwaite <peter.crosthwaite@petalogix.com>
+ *
+ * Based on MMC controller for Samsung S5PC1xx-based board emulation
+ * by Alexey Merkulov and Vladimir Monakhov.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "hw/hw.h"
+#include "sysemu/blockdev.h"
+#include "sysemu/dma.h"
+#include "qemu/timer.h"
+#include "block/block_int.h"
+#include "qemu/bitops.h"
+
+#include "hw/sdhci.h"
+
+/* host controller debug messages */
+#ifndef SDHC_DEBUG
+#define SDHC_DEBUG                        0
+#endif
+
+#if SDHC_DEBUG == 0
+    #define DPRINT_L1(fmt, args...)       do { } while (0)
+    #define DPRINT_L2(fmt, args...)       do { } while (0)
+    #define ERRPRINT(fmt, args...)        do { } while (0)
+#elif SDHC_DEBUG == 1
+    #define DPRINT_L1(fmt, args...)       \
+        do {fprintf(stderr, "QEMU SDHC: "fmt, ## args); } while (0)
+    #define DPRINT_L2(fmt, args...)       do { } while (0)
+    #define ERRPRINT(fmt, args...)        \
+        do {fprintf(stderr, "QEMU SDHC ERROR: "fmt, ## args); } while (0)
+#else
+    #define DPRINT_L1(fmt, args...)       \
+        do {fprintf(stderr, "QEMU SDHC: "fmt, ## args); } while (0)
+    #define DPRINT_L2(fmt, args...)       \
+        do {fprintf(stderr, "QEMU SDHC: "fmt, ## args); } while (0)
+    #define ERRPRINT(fmt, args...)        \
+        do {fprintf(stderr, "QEMU SDHC ERROR: "fmt, ## args); } while (0)
+#endif
+
+/* Default SD/MMC host controller features information, which will be
+ * presented in CAPABILITIES register of generic SD host controller at reset.
+ * If not stated otherwise:
+ * 0 - not supported, 1 - supported, other - prohibited.
+ */
+#define SDHC_CAPAB_64BITBUS       0ul        /* 64-bit System Bus Support */
+#define SDHC_CAPAB_18V            1ul        /* Voltage support 1.8v */
+#define SDHC_CAPAB_30V            0ul        /* Voltage support 3.0v */
+#define SDHC_CAPAB_33V            1ul        /* Voltage support 3.3v */
+#define SDHC_CAPAB_SUSPRESUME     0ul        /* Suspend/resume support */
+#define SDHC_CAPAB_SDMA           1ul        /* SDMA support */
+#define SDHC_CAPAB_HIGHSPEED      1ul        /* High speed support */
+#define SDHC_CAPAB_ADMA1          1ul        /* ADMA1 support */
+#define SDHC_CAPAB_ADMA2          1ul        /* ADMA2 support */
+/* Maximum host controller R/W buffers size
+ * Possible values: 512, 1024, 2048 bytes */
+#define SDHC_CAPAB_MAXBLOCKLENGTH 512ul
+/* Maximum clock frequency for SDclock in MHz
+ * value in range 10-63 MHz, 0 - not defined */
+#define SDHC_CAPAB_BASECLKFREQ    0ul
+#define SDHC_CAPAB_TOUNIT         1ul  /* Timeout clock unit 0 - kHz, 1 - MHz */
+/* Timeout clock frequency 1-63, 0 - not defined */
+#define SDHC_CAPAB_TOCLKFREQ      0ul
+
+/* Now check all parameters and calculate CAPABILITIES REGISTER value */
+#if SDHC_CAPAB_64BITBUS > 1 || SDHC_CAPAB_18V > 1 || SDHC_CAPAB_30V > 1 ||     \
+    SDHC_CAPAB_33V > 1 || SDHC_CAPAB_SUSPRESUME > 1 || SDHC_CAPAB_SDMA > 1 ||  \
+    SDHC_CAPAB_HIGHSPEED > 1 || SDHC_CAPAB_ADMA2 > 1 || SDHC_CAPAB_ADMA1 > 1 ||\
+    SDHC_CAPAB_TOUNIT > 1
+#error Capabilities features can have value 0 or 1 only!
+#endif
+
+#if SDHC_CAPAB_MAXBLOCKLENGTH == 512
+#define MAX_BLOCK_LENGTH 0ul
+#elif SDHC_CAPAB_MAXBLOCKLENGTH == 1024
+#define MAX_BLOCK_LENGTH 1ul
+#elif SDHC_CAPAB_MAXBLOCKLENGTH == 2048
+#define MAX_BLOCK_LENGTH 2ul
+#else
+#error Max host controller block size can have value 512, 1024 or 2048 only!
+#endif
+
+#if (SDHC_CAPAB_BASECLKFREQ > 0 && SDHC_CAPAB_BASECLKFREQ < 10) || \
+    SDHC_CAPAB_BASECLKFREQ > 63
+#error SDclock frequency can have value in range 0, 10-63 only!
+#endif
+
+#if SDHC_CAPAB_TOCLKFREQ > 63
+#error Timeout clock frequency can have value in range 0-63 only!
+#endif
+
+#define SDHC_CAPAB_REG_DEFAULT                                 \
+   ((SDHC_CAPAB_64BITBUS << 28) | (SDHC_CAPAB_18V << 26) |     \
+    (SDHC_CAPAB_30V << 25) | (SDHC_CAPAB_33V << 24) |          \
+    (SDHC_CAPAB_SUSPRESUME << 23) | (SDHC_CAPAB_SDMA << 22) |  \
+    (SDHC_CAPAB_HIGHSPEED << 21) | (SDHC_CAPAB_ADMA1 << 20) |  \
+    (SDHC_CAPAB_ADMA2 << 19) | (MAX_BLOCK_LENGTH << 16) |      \
+    (SDHC_CAPAB_BASECLKFREQ << 8) | (SDHC_CAPAB_TOUNIT << 7) | \
+    (SDHC_CAPAB_TOCLKFREQ))
+
+#define MASKED_WRITE(reg, mask, val)  (reg = (reg & (mask)) | (val))
+
+static uint8_t sdhci_slotint(SDHCIState *s)
+{
+    return (s->norintsts & s->norintsigen) || (s->errintsts & s->errintsigen) ||
+         ((s->norintsts & SDHC_NIS_INSERT) && (s->wakcon & SDHC_WKUP_ON_INS)) ||
+         ((s->norintsts & SDHC_NIS_REMOVE) && (s->wakcon & SDHC_WKUP_ON_RMV));
+}
+
+static inline void sdhci_update_irq(SDHCIState *s)
+{
+    qemu_set_irq(s->irq, sdhci_slotint(s));
+}
+
+static void sdhci_raise_insertion_irq(void *opaque)
+{
+    SDHCIState *s = (SDHCIState *)opaque;
+
+    if (s->norintsts & SDHC_NIS_REMOVE) {
+        qemu_mod_timer(s->insert_timer,
+                       qemu_get_clock_ns(vm_clock) + SDHC_INSERTION_DELAY);
+    } else {
+        s->prnsts = 0x1ff0000;
+        if (s->norintstsen & SDHC_NISEN_INSERT) {
+            s->norintsts |= SDHC_NIS_INSERT;
+        }
+        sdhci_update_irq(s);
+    }
+}
+
+static void sdhci_insert_eject_cb(void *opaque, int irq, int level)
+{
+    SDHCIState *s = (SDHCIState *)opaque;
+    DPRINT_L1("Card state changed: %s!\n", level ? "insert" : "eject");
+
+    if ((s->norintsts & SDHC_NIS_REMOVE) && level) {
+        /* Give target some time to notice card ejection */
+        qemu_mod_timer(s->insert_timer,
+                       qemu_get_clock_ns(vm_clock) + SDHC_INSERTION_DELAY);
+    } else {
+        if (level) {
+            s->prnsts = 0x1ff0000;
+            if (s->norintstsen & SDHC_NISEN_INSERT) {
+                s->norintsts |= SDHC_NIS_INSERT;
+            }
+        } else {
+            s->prnsts = 0x1fa0000;
+            s->pwrcon &= ~SDHC_POWER_ON;
+            s->clkcon &= ~SDHC_CLOCK_SDCLK_EN;
+            if (s->norintstsen & SDHC_NISEN_REMOVE) {
+                s->norintsts |= SDHC_NIS_REMOVE;
+            }
+        }
+        sdhci_update_irq(s);
+    }
+}
+
+static void sdhci_card_readonly_cb(void *opaque, int irq, int level)
+{
+    SDHCIState *s = (SDHCIState *)opaque;
+
+    if (level) {
+        s->prnsts &= ~SDHC_WRITE_PROTECT;
+    } else {
+        /* Write enabled */
+        s->prnsts |= SDHC_WRITE_PROTECT;
+    }
+}
+
+static void sdhci_reset(SDHCIState *s)
+{
+    qemu_del_timer(s->insert_timer);
+    qemu_del_timer(s->transfer_timer);
+    /* Set all registers to 0. Capabilities registers are not cleared
+     * and assumed to always preserve their value, given to them during
+     * initialization */
+    memset(&s->sdmasysad, 0, (uintptr_t)&s->capareg - (uintptr_t)&s->sdmasysad);
+
+    sd_set_cb(s->card, s->ro_cb, s->eject_cb);
+    s->data_count = 0;
+    s->stopped_state = sdhc_not_stopped;
+}
+
+static void sdhci_do_data_transfer(void *opaque)
+{
+    SDHCIState *s = (SDHCIState *)opaque;
+
+    SDHCI_GET_CLASS(s)->data_transfer(s);
+}
+
+static void sdhci_send_command(SDHCIState *s)
+{
+    SDRequest request;
+    uint8_t response[16];
+    int rlen;
+
+    s->errintsts = 0;
+    s->acmd12errsts = 0;
+    request.cmd = s->cmdreg >> 8;
+    request.arg = s->argument;
+    DPRINT_L1("sending CMD%u ARG[0x%08x]\n", request.cmd, request.arg);
+    rlen = sd_do_command(s->card, &request, response);
+
+    if (s->cmdreg & SDHC_CMD_RESPONSE) {
+        if (rlen == 4) {
+            s->rspreg[0] = (response[0] << 24) | (response[1] << 16) |
+                           (response[2] << 8)  |  response[3];
+            s->rspreg[1] = s->rspreg[2] = s->rspreg[3] = 0;
+            DPRINT_L1("Response: RSPREG[31..0]=0x%08x\n", s->rspreg[0]);
+        } else if (rlen == 16) {
+            s->rspreg[0] = (response[11] << 24) | (response[12] << 16) |
+                           (response[13] << 8) |  response[14];
+            s->rspreg[1] = (response[7] << 24) | (response[8] << 16) |
+                           (response[9] << 8)  |  response[10];
+            s->rspreg[2] = (response[3] << 24) | (response[4] << 16) |
+                           (response[5] << 8)  |  response[6];
+            s->rspreg[3] = (response[0] << 16) | (response[1] << 8) |
+                            response[2];
+            DPRINT_L1("Response received:\n RSPREG[127..96]=0x%08x, RSPREG[95.."
+                  "64]=0x%08x,\n RSPREG[63..32]=0x%08x, RSPREG[31..0]=0x%08x\n",
+                  s->rspreg[3], s->rspreg[2], s->rspreg[1], s->rspreg[0]);
+        } else {
+            ERRPRINT("Timeout waiting for command response\n");
+            if (s->errintstsen & SDHC_EISEN_CMDTIMEOUT) {
+                s->errintsts |= SDHC_EIS_CMDTIMEOUT;
+                s->norintsts |= SDHC_NIS_ERR;
+            }
+        }
+
+        if ((s->norintstsen & SDHC_NISEN_TRSCMP) &&
+            (s->cmdreg & SDHC_CMD_RESPONSE) == SDHC_CMD_RSP_WITH_BUSY) {
+            s->norintsts |= SDHC_NIS_TRSCMP;
+        }
+    } else if (rlen != 0 && (s->errintstsen & SDHC_EISEN_CMDIDX)) {
+        s->errintsts |= SDHC_EIS_CMDIDX;
+        s->norintsts |= SDHC_NIS_ERR;
+    }
+
+    if (s->norintstsen & SDHC_NISEN_CMDCMP) {
+        s->norintsts |= SDHC_NIS_CMDCMP;
+    }
+
+    sdhci_update_irq(s);
+
+    if (s->blksize && (s->cmdreg & SDHC_CMD_DATA_PRESENT)) {
+        sdhci_do_data_transfer(s);
+    }
+}
+
+static void sdhci_end_transfer(SDHCIState *s)
+{
+    /* Automatically send CMD12 to stop transfer if AutoCMD12 enabled */
+    if ((s->trnmod & SDHC_TRNS_ACMD12) != 0) {
+        SDRequest request;
+        uint8_t response[16];
+
+        request.cmd = 0x0C;
+        request.arg = 0;
+        DPRINT_L1("Automatically issue CMD%d %08x\n", request.cmd, request.arg);
+        sd_do_command(s->card, &request, response);
+        /* Auto CMD12 response goes to the upper Response register */
+        s->rspreg[3] = (response[0] << 24) | (response[1] << 16) |
+                (response[2] << 8) | response[3];
+    }
+
+    s->prnsts &= ~(SDHC_DOING_READ | SDHC_DOING_WRITE |
+            SDHC_DAT_LINE_ACTIVE | SDHC_DATA_INHIBIT |
+            SDHC_SPACE_AVAILABLE | SDHC_DATA_AVAILABLE);
+
+    if (s->norintstsen & SDHC_NISEN_TRSCMP) {
+        s->norintsts |= SDHC_NIS_TRSCMP;
+    }
+
+    sdhci_update_irq(s);
+}
+
+/*
+ * Programmed i/o data transfer
+ */
+
+/* Fill host controller's read buffer with BLKSIZE bytes of data from card */
+static void sdhci_read_block_from_card(SDHCIState *s)
+{
+    int index = 0;
+
+    if ((s->trnmod & SDHC_TRNS_MULTI) &&
+            (s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0)) {
+        return;
+    }
+
+    for (index = 0; index < (s->blksize & 0x0fff); index++) {
+        s->fifo_buffer[index] = sd_read_data(s->card);
+    }
+
+    /* New data now available for READ through Buffer Port Register */
+    s->prnsts |= SDHC_DATA_AVAILABLE;
+    if (s->norintstsen & SDHC_NISEN_RBUFRDY) {
+        s->norintsts |= SDHC_NIS_RBUFRDY;
+    }
+
+    /* Clear DAT line active status if that was the last block */
+    if ((s->trnmod & SDHC_TRNS_MULTI) == 0 ||
+            ((s->trnmod & SDHC_TRNS_MULTI) && s->blkcnt == 1)) {
+        s->prnsts &= ~SDHC_DAT_LINE_ACTIVE;
+    }
+
+    /* If stop at block gap request was set and it's not the last block of
+     * data - generate Block Event interrupt */
+    if (s->stopped_state == sdhc_gap_read && (s->trnmod & SDHC_TRNS_MULTI) &&
+            s->blkcnt != 1)    {
+        s->prnsts &= ~SDHC_DAT_LINE_ACTIVE;
+        if (s->norintstsen & SDHC_EISEN_BLKGAP) {
+            s->norintsts |= SDHC_EIS_BLKGAP;
+        }
+    }
+
+    sdhci_update_irq(s);
+}
+
+/* Read @size byte of data from host controller @s BUFFER DATA PORT register */
+static uint32_t sdhci_read_dataport(SDHCIState *s, unsigned size)
+{
+    uint32_t value = 0;
+    int i;
+
+    /* first check that a valid data exists in host controller input buffer */
+    if ((s->prnsts & SDHC_DATA_AVAILABLE) == 0) {
+        ERRPRINT("Trying to read from empty buffer\n");
+        return 0;
+    }
+
+    for (i = 0; i < size; i++) {
+        value |= s->fifo_buffer[s->data_count] << i * 8;
+        s->data_count++;
+        /* check if we've read all valid data (blksize bytes) from buffer */
+        if ((s->data_count) >= (s->blksize & 0x0fff)) {
+            DPRINT_L2("All %u bytes of data have been read from input buffer\n",
+                    s->data_count);
+            s->prnsts &= ~SDHC_DATA_AVAILABLE; /* no more data in a buffer */
+            s->data_count = 0;  /* next buff read must start at position [0] */
+
+            if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+                s->blkcnt--;
+            }
+
+            /* if that was the last block of data */
+            if ((s->trnmod & SDHC_TRNS_MULTI) == 0 ||
+                ((s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0)) ||
+                 /* stop at gap request */
+                (s->stopped_state == sdhc_gap_read &&
+                 !(s->prnsts & SDHC_DAT_LINE_ACTIVE))) {
+                SDHCI_GET_CLASS(s)->end_data_transfer(s);
+            } else { /* if there are more data, read next block from card */
+                SDHCI_GET_CLASS(s)->read_block_from_card(s);
+            }
+            break;
+        }
+    }
+
+    return value;
+}
+
+/* Write data from host controller FIFO to card */
+static void sdhci_write_block_to_card(SDHCIState *s)
+{
+    int index = 0;
+
+    if (s->prnsts & SDHC_SPACE_AVAILABLE) {
+        if (s->norintstsen & SDHC_NISEN_WBUFRDY) {
+            s->norintsts |= SDHC_NIS_WBUFRDY;
+        }
+        sdhci_update_irq(s);
+        return;
+    }
+
+    if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+        if (s->blkcnt == 0) {
+            return;
+        } else {
+            s->blkcnt--;
+        }
+    }
+
+    for (index = 0; index < (s->blksize & 0x0fff); index++) {
+        sd_write_data(s->card, s->fifo_buffer[index]);
+    }
+
+    /* Next data can be written through BUFFER DATORT register */
+    s->prnsts |= SDHC_SPACE_AVAILABLE;
+    if (s->norintstsen & SDHC_NISEN_WBUFRDY) {
+        s->norintsts |= SDHC_NIS_WBUFRDY;
+    }
+
+    /* Finish transfer if that was the last block of data */
+    if ((s->trnmod & SDHC_TRNS_MULTI) == 0 ||
+            ((s->trnmod & SDHC_TRNS_MULTI) &&
+            (s->trnmod & SDHC_TRNS_BLK_CNT_EN) && (s->blkcnt == 0))) {
+        SDHCI_GET_CLASS(s)->end_data_transfer(s);
+    }
+
+    /* Generate Block Gap Event if requested and if not the last block */
+    if (s->stopped_state == sdhc_gap_write && (s->trnmod & SDHC_TRNS_MULTI) &&
+            s->blkcnt > 0) {
+        s->prnsts &= ~SDHC_DOING_WRITE;
+        if (s->norintstsen & SDHC_EISEN_BLKGAP) {
+            s->norintsts |= SDHC_EIS_BLKGAP;
+        }
+        SDHCI_GET_CLASS(s)->end_data_transfer(s);
+    }
+
+    sdhci_update_irq(s);
+}
+
+/* Write @size bytes of @value data to host controller @s Buffer Data Port
+ * register */
+static void sdhci_write_dataport(SDHCIState *s, uint32_t value, unsigned size)
+{
+    unsigned i;
+
+    /* Check that there is free space left in a buffer */
+    if (!(s->prnsts & SDHC_SPACE_AVAILABLE)) {
+        ERRPRINT("Can't write to data buffer: buffer full\n");
+        return;
+    }
+
+    for (i = 0; i < size; i++) {
+        s->fifo_buffer[s->data_count] = value & 0xFF;
+        s->data_count++;
+        value >>= 8;
+        if (s->data_count >= (s->blksize & 0x0fff)) {
+            DPRINT_L2("write buffer filled with %u bytes of data\n",
+                    s->data_count);
+            s->data_count = 0;
+            s->prnsts &= ~SDHC_SPACE_AVAILABLE;
+            if (s->prnsts & SDHC_DOING_WRITE) {
+                SDHCI_GET_CLASS(s)->write_block_to_card(s);
+            }
+        }
+    }
+}
+
+/*
+ * Single DMA data transfer
+ */
+
+/* Multi block SDMA transfer */
+static void sdhci_sdma_transfer_multi_blocks(SDHCIState *s)
+{
+    bool page_aligned = false;
+    unsigned int n, begin;
+    const uint16_t block_size = s->blksize & 0x0fff;
+    uint32_t boundary_chk = 1 << (((s->blksize & 0xf000) >> 12) + 12);
+    uint32_t boundary_count = boundary_chk - (s->sdmasysad % boundary_chk);
+
+    /* XXX: Some sd/mmc drivers (for example, u-boot-slp) do not account for
+     * possible stop at page boundary if initial address is not page aligned,
+     * allow them to work properly */
+    if ((s->sdmasysad % boundary_chk) == 0) {
+        page_aligned = true;
+    }
+
+    if (s->trnmod & SDHC_TRNS_READ) {
+        s->prnsts |= SDHC_DOING_READ | SDHC_DATA_INHIBIT |
+                SDHC_DAT_LINE_ACTIVE;
+        while (s->blkcnt) {
+            if (s->data_count == 0) {
+                for (n = 0; n < block_size; n++) {
+                    s->fifo_buffer[n] = sd_read_data(s->card);
+                }
+            }
+            begin = s->data_count;
+            if (((boundary_count + begin) < block_size) && page_aligned) {
+                s->data_count = boundary_count + begin;
+                boundary_count = 0;
+             } else {
+                s->data_count = block_size;
+                boundary_count -= block_size - begin;
+                if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+                    s->blkcnt--;
+                }
+            }
+            dma_memory_write(&dma_context_memory, s->sdmasysad,
+                             &s->fifo_buffer[begin], s->data_count - begin);
+            s->sdmasysad += s->data_count - begin;
+            if (s->data_count == block_size) {
+                s->data_count = 0;
+            }
+            if (page_aligned && boundary_count == 0) {
+                break;
+            }
+        }
+    } else {
+        s->prnsts |= SDHC_DOING_WRITE | SDHC_DATA_INHIBIT |
+                SDHC_DAT_LINE_ACTIVE;
+        while (s->blkcnt) {
+            begin = s->data_count;
+            if (((boundary_count + begin) < block_size) && page_aligned) {
+                s->data_count = boundary_count + begin;
+                boundary_count = 0;
+             } else {
+                s->data_count = block_size;
+                boundary_count -= block_size - begin;
+            }
+            dma_memory_read(&dma_context_memory, s->sdmasysad,
+                            &s->fifo_buffer[begin], s->data_count);
+            s->sdmasysad += s->data_count - begin;
+            if (s->data_count == block_size) {
+                for (n = 0; n < block_size; n++) {
+                    sd_write_data(s->card, s->fifo_buffer[n]);
+                }
+                s->data_count = 0;
+                if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+                    s->blkcnt--;
+                }
+            }
+            if (page_aligned && boundary_count == 0) {
+                break;
+            }
+        }
+    }
+
+    if (s->blkcnt == 0) {
+        SDHCI_GET_CLASS(s)->end_data_transfer(s);
+    } else {
+        if (s->norintstsen & SDHC_NISEN_DMA) {
+            s->norintsts |= SDHC_NIS_DMA;
+        }
+        sdhci_update_irq(s);
+    }
+}
+
+/* single block SDMA transfer */
+
+static void sdhci_sdma_transfer_single_block(SDHCIState *s)
+{
+    int n;
+    uint32_t datacnt = s->blksize & 0x0fff;
+
+    if (s->trnmod & SDHC_TRNS_READ) {
+        for (n = 0; n < datacnt; n++) {
+            s->fifo_buffer[n] = sd_read_data(s->card);
+        }
+        dma_memory_write(&dma_context_memory, s->sdmasysad, s->fifo_buffer,
+                         datacnt);
+    } else {
+        dma_memory_read(&dma_context_memory, s->sdmasysad, s->fifo_buffer,
+                        datacnt);
+        for (n = 0; n < datacnt; n++) {
+            sd_write_data(s->card, s->fifo_buffer[n]);
+        }
+    }
+
+    if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+        s->blkcnt--;
+    }
+
+    SDHCI_GET_CLASS(s)->end_data_transfer(s);
+}
+
+typedef struct ADMADescr {
+    hwaddr addr;
+    uint16_t length;
+    uint8_t attr;
+    uint8_t incr;
+} ADMADescr;
+
+static void get_adma_description(SDHCIState *s, ADMADescr *dscr)
+{
+    uint32_t adma1 = 0;
+    uint64_t adma2 = 0;
+    hwaddr entry_addr = (hwaddr)s->admasysaddr;
+    switch (SDHC_DMA_TYPE(s->hostctl)) {
+    case SDHC_CTRL_ADMA2_32:
+        dma_memory_read(&dma_context_memory, entry_addr, (uint8_t *)&adma2,
+                        sizeof(adma2));
+        adma2 = le64_to_cpu(adma2);
+        /* The spec does not specify endianness of descriptor table.
+         * We currently assume that it is LE.
+         */
+        dscr->addr = (hwaddr)extract64(adma2, 32, 32) & ~0x3ull;
+        dscr->length = (uint16_t)extract64(adma2, 16, 16);
+        dscr->attr = (uint8_t)extract64(adma2, 0, 7);
+        dscr->incr = 8;
+        break;
+    case SDHC_CTRL_ADMA1_32:
+        dma_memory_read(&dma_context_memory, entry_addr, (uint8_t *)&adma1,
+                        sizeof(adma1));
+        adma1 = le32_to_cpu(adma1);
+        dscr->addr = (hwaddr)(adma1 & 0xFFFFF000);
+        dscr->attr = (uint8_t)extract32(adma1, 0, 7);
+        dscr->incr = 4;
+        if ((dscr->attr & SDHC_ADMA_ATTR_ACT_MASK) == SDHC_ADMA_ATTR_SET_LEN) {
+            dscr->length = (uint16_t)extract32(adma1, 12, 16);
+        } else {
+            dscr->length = 4096;
+        }
+        break;
+    case SDHC_CTRL_ADMA2_64:
+        dma_memory_read(&dma_context_memory, entry_addr,
+                        (uint8_t *)(&dscr->attr), 1);
+        dma_memory_read(&dma_context_memory, entry_addr + 2,
+                        (uint8_t *)(&dscr->length), 2);
+        dscr->length = le16_to_cpu(dscr->length);
+        dma_memory_read(&dma_context_memory, entry_addr + 4,
+                        (uint8_t *)(&dscr->addr), 8);
+        dscr->attr = le64_to_cpu(dscr->attr);
+        dscr->attr &= 0xfffffff8;
+        dscr->incr = 12;
+        break;
+    }
+}
+
+/* Advanced DMA data transfer */
+
+static void sdhci_do_adma(SDHCIState *s)
+{
+    unsigned int n, begin, length;
+    const uint16_t block_size = s->blksize & 0x0fff;
+    ADMADescr dscr;
+    int i;
+
+    for (i = 0; i < SDHC_ADMA_DESCS_PER_DELAY; ++i) {
+        s->admaerr &= ~SDHC_ADMAERR_LENGTH_MISMATCH;
+
+        get_adma_description(s, &dscr);
+        DPRINT_L2("ADMA loop: addr=" TARGET_FMT_plx ", len=%d, attr=%x\n",
+                dscr.addr, dscr.length, dscr.attr);
+
+        if ((dscr.attr & SDHC_ADMA_ATTR_VALID) == 0) {
+            /* Indicate that error occurred in ST_FDS state */
+            s->admaerr &= ~SDHC_ADMAERR_STATE_MASK;
+            s->admaerr |= SDHC_ADMAERR_STATE_ST_FDS;
+
+            /* Generate ADMA error interrupt */
+            if (s->errintstsen & SDHC_EISEN_ADMAERR) {
+                s->errintsts |= SDHC_EIS_ADMAERR;
+                s->norintsts |= SDHC_NIS_ERR;
+            }
+
+            sdhci_update_irq(s);
+            return;
+        }
+
+        length = dscr.length ? dscr.length : 65536;
+
+        switch (dscr.attr & SDHC_ADMA_ATTR_ACT_MASK) {
+        case SDHC_ADMA_ATTR_ACT_TRAN:  /* data transfer */
+
+            if (s->trnmod & SDHC_TRNS_READ) {
+                while (length) {
+                    if (s->data_count == 0) {
+                        for (n = 0; n < block_size; n++) {
+                            s->fifo_buffer[n] = sd_read_data(s->card);
+                        }
+                    }
+                    begin = s->data_count;
+                    if ((length + begin) < block_size) {
+                        s->data_count = length + begin;
+                        length = 0;
+                     } else {
+                        s->data_count = block_size;
+                        length -= block_size - begin;
+                    }
+                    dma_memory_write(&dma_context_memory, dscr.addr,
+                                     &s->fifo_buffer[begin],
+                                     s->data_count - begin);
+                    dscr.addr += s->data_count - begin;
+                    if (s->data_count == block_size) {
+                        s->data_count = 0;
+                        if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+                            s->blkcnt--;
+                            if (s->blkcnt == 0) {
+                                break;
+                            }
+                        }
+                    }
+                }
+            } else {
+                while (length) {
+                    begin = s->data_count;
+                    if ((length + begin) < block_size) {
+                        s->data_count = length + begin;
+                        length = 0;
+                     } else {
+                        s->data_count = block_size;
+                        length -= block_size - begin;
+                    }
+                    dma_memory_read(&dma_context_memory, dscr.addr,
+                                    &s->fifo_buffer[begin], s->data_count);
+                    dscr.addr += s->data_count - begin;
+                    if (s->data_count == block_size) {
+                        for (n = 0; n < block_size; n++) {
+                            sd_write_data(s->card, s->fifo_buffer[n]);
+                        }
+                        s->data_count = 0;
+                        if (s->trnmod & SDHC_TRNS_BLK_CNT_EN) {
+                            s->blkcnt--;
+                            if (s->blkcnt == 0) {
+                                break;
+                            }
+                        }
+                    }
+                }
+            }
+            s->admasysaddr += dscr.incr;
+            break;
+        case SDHC_ADMA_ATTR_ACT_LINK:   /* link to next descriptor table */
+            s->admasysaddr = dscr.addr;
+            DPRINT_L1("ADMA link: admasysaddr=0x%lx\n", s->admasysaddr);
+            break;
+        default:
+            s->admasysaddr += dscr.incr;
+            break;
+        }
+
+        /* ADMA transfer terminates if blkcnt == 0 or by END attribute */
+        if (((s->trnmod & SDHC_TRNS_BLK_CNT_EN) &&
+                    (s->blkcnt == 0)) || (dscr.attr & SDHC_ADMA_ATTR_END)) {
+            DPRINT_L2("ADMA transfer completed\n");
+            if (length || ((dscr.attr & SDHC_ADMA_ATTR_END) &&
+                (s->trnmod & SDHC_TRNS_BLK_CNT_EN) &&
+                s->blkcnt != 0)) {
+                ERRPRINT("SD/MMC host ADMA length mismatch\n");
+                s->admaerr |= SDHC_ADMAERR_LENGTH_MISMATCH |
+                        SDHC_ADMAERR_STATE_ST_TFR;
+                if (s->errintstsen & SDHC_EISEN_ADMAERR) {
+                    ERRPRINT("Set ADMA error flag\n");
+                    s->errintsts |= SDHC_EIS_ADMAERR;
+                    s->norintsts |= SDHC_NIS_ERR;
+                }
+
+                sdhci_update_irq(s);
+            }
+            SDHCI_GET_CLASS(s)->end_data_transfer(s);
+            return;
+        }
+
+        if (dscr.attr & SDHC_ADMA_ATTR_INT) {
+            DPRINT_L1("ADMA interrupt: admasysaddr=0x%lx\n", s->admasysaddr);
+            if (s->norintstsen & SDHC_NISEN_DMA) {
+                s->norintsts |= SDHC_NIS_DMA;
+            }
+
+            sdhci_update_irq(s);
+            return;
+        }
+    }
+
+    /* we have unfinished business - reschedule to continue ADMA */
+    qemu_mod_timer(s->transfer_timer,
+                   qemu_get_clock_ns(vm_clock) + SDHC_TRANSFER_DELAY);
+}
+
+/* Perform data transfer according to controller configuration */
+
+static void sdhci_data_transfer(SDHCIState *s)
+{
+    SDHCIClass *k = SDHCI_GET_CLASS(s);
+    s->data_count = 0;
+
+    if (s->trnmod & SDHC_TRNS_DMA) {
+        switch (SDHC_DMA_TYPE(s->hostctl)) {
+        case SDHC_CTRL_SDMA:
+            if ((s->trnmod & SDHC_TRNS_MULTI) &&
+                    (!(s->trnmod & SDHC_TRNS_BLK_CNT_EN) || s->blkcnt == 0)) {
+                break;
+            }
+
+            if ((s->blkcnt == 1) || !(s->trnmod & SDHC_TRNS_MULTI)) {
+                k->do_sdma_single(s);
+            } else {
+                k->do_sdma_multi(s);
+            }
+
+            break;
+        case SDHC_CTRL_ADMA1_32:
+            if (!(s->capareg & SDHC_CAN_DO_ADMA1)) {
+                ERRPRINT("ADMA1 not supported\n");
+                break;
+            }
+
+            k->do_adma(s);
+            break;
+        case SDHC_CTRL_ADMA2_32:
+            if (!(s->capareg & SDHC_CAN_DO_ADMA2)) {
+                ERRPRINT("ADMA2 not supported\n");
+                break;
+            }
+
+            k->do_adma(s);
+            break;
+        case SDHC_CTRL_ADMA2_64:
+            if (!(s->capareg & SDHC_CAN_DO_ADMA2) ||
+                    !(s->capareg & SDHC_64_BIT_BUS_SUPPORT)) {
+                ERRPRINT("64 bit ADMA not supported\n");
+                break;
+            }
+
+            k->do_adma(s);
+            break;
+        default:
+            ERRPRINT("Unsupported DMA type\n");
+            break;
+        }
+    } else {
+        if ((s->trnmod & SDHC_TRNS_READ) && sd_data_ready(s->card)) {
+            s->prnsts |= SDHC_DOING_READ | SDHC_DATA_INHIBIT |
+                    SDHC_DAT_LINE_ACTIVE;
+            SDHCI_GET_CLASS(s)->read_block_from_card(s);
+        } else {
+            s->prnsts |= SDHC_DOING_WRITE | SDHC_DAT_LINE_ACTIVE |
+                    SDHC_SPACE_AVAILABLE | SDHC_DATA_INHIBIT;
+            SDHCI_GET_CLASS(s)->write_block_to_card(s);
+        }
+    }
+}
+
+static bool sdhci_can_issue_command(SDHCIState *s)
+{
+    if (!SDHC_CLOCK_IS_ON(s->clkcon) || !(s->pwrcon & SDHC_POWER_ON) ||
+        (((s->prnsts & SDHC_DATA_INHIBIT) || s->stopped_state) &&
+        ((s->cmdreg & SDHC_CMD_DATA_PRESENT) ||
+        ((s->cmdreg & SDHC_CMD_RESPONSE) == SDHC_CMD_RSP_WITH_BUSY &&
+        !(SDHC_COMMAND_TYPE(s->cmdreg) == SDHC_CMD_ABORT))))) {
+        return false;
+    }
+
+    return true;
+}
+
+/* The Buffer Data Port register must be accessed in sequential and
+ * continuous manner */
+static inline bool
+sdhci_buff_access_is_sequential(SDHCIState *s, unsigned byte_num)
+{
+    if ((s->data_count & 0x3) != byte_num) {
+        ERRPRINT("Non-sequential access to Buffer Data Port register"
+                "is prohibited\n");
+        return false;
+    }
+    return true;
+}
+
+static uint32_t sdhci_read(SDHCIState *s, unsigned int offset, unsigned size)
+{
+    uint32_t ret = 0;
+
+    switch (offset & ~0x3) {
+    case SDHC_SYSAD:
+        ret = s->sdmasysad;
+        break;
+    case SDHC_BLKSIZE:
+        ret = s->blksize | (s->blkcnt << 16);
+        break;
+    case SDHC_ARGUMENT:
+        ret = s->argument;
+        break;
+    case SDHC_TRNMOD:
+        ret = s->trnmod | (s->cmdreg << 16);
+        break;
+    case SDHC_RSPREG0 ... SDHC_RSPREG3:
+        ret = s->rspreg[((offset & ~0x3) - SDHC_RSPREG0) >> 2];
+        break;
+    case  SDHC_BDATA:
+        if (sdhci_buff_access_is_sequential(s, offset - SDHC_BDATA)) {
+            ret = SDHCI_GET_CLASS(s)->bdata_read(s, size);
+            DPRINT_L2("read %ub: addr[0x%04x] -> %u\n", size, offset, ret);
+            return ret;
+        }
+        break;
+    case SDHC_PRNSTS:
+        ret = s->prnsts;
+        break;
+    case SDHC_HOSTCTL:
+        ret = s->hostctl | (s->pwrcon << 8) | (s->blkgap << 16) |
+              (s->wakcon << 24);
+        break;
+    case SDHC_CLKCON:
+        ret = s->clkcon | (s->timeoutcon << 16);
+        break;
+    case SDHC_NORINTSTS:
+        ret = s->norintsts | (s->errintsts << 16);
+        break;
+    case SDHC_NORINTSTSEN:
+        ret = s->norintstsen | (s->errintstsen << 16);
+        break;
+    case SDHC_NORINTSIGEN:
+        ret = s->norintsigen | (s->errintsigen << 16);
+        break;
+    case SDHC_ACMD12ERRSTS:
+        ret = s->acmd12errsts;
+        break;
+    case SDHC_CAPAREG:
+        ret = s->capareg;
+        break;
+    case SDHC_MAXCURR:
+        ret = s->maxcurr;
+        break;
+    case SDHC_ADMAERR:
+        ret =  s->admaerr;
+        break;
+    case SDHC_ADMASYSADDR:
+        ret = (uint32_t)s->admasysaddr;
+        break;
+    case SDHC_ADMASYSADDR + 4:
+        ret = (uint32_t)(s->admasysaddr >> 32);
+        break;
+    case SDHC_SLOT_INT_STATUS:
+        ret = (SD_HOST_SPECv2_VERS << 16) | sdhci_slotint(s);
+        break;
+    default:
+        ERRPRINT("bad %ub read: addr[0x%04x]\n", size, offset);
+        break;
+    }
+
+    ret >>= (offset & 0x3) * 8;
+    ret &= (1ULL << (size * 8)) - 1;
+    DPRINT_L2("read %ub: addr[0x%04x] -> %u(0x%x)\n", size, offset, ret, ret);
+    return ret;
+}
+
+static inline void sdhci_blkgap_write(SDHCIState *s, uint8_t value)
+{
+    if ((value & SDHC_STOP_AT_GAP_REQ) && (s->blkgap & SDHC_STOP_AT_GAP_REQ)) {
+        return;
+    }
+    s->blkgap = value & SDHC_STOP_AT_GAP_REQ;
+
+    if ((value & SDHC_CONTINUE_REQ) && s->stopped_state &&
+            (s->blkgap & SDHC_STOP_AT_GAP_REQ) == 0) {
+        if (s->stopped_state == sdhc_gap_read) {
+            s->prnsts |= SDHC_DAT_LINE_ACTIVE | SDHC_DOING_READ;
+            SDHCI_GET_CLASS(s)->read_block_from_card(s);
+        } else {
+            s->prnsts |= SDHC_DAT_LINE_ACTIVE | SDHC_DOING_WRITE;
+            SDHCI_GET_CLASS(s)->write_block_to_card(s);
+        }
+        s->stopped_state = sdhc_not_stopped;
+    } else if (!s->stopped_state && (value & SDHC_STOP_AT_GAP_REQ)) {
+        if (s->prnsts & SDHC_DOING_READ) {
+            s->stopped_state = sdhc_gap_read;
+        } else if (s->prnsts & SDHC_DOING_WRITE) {
+            s->stopped_state = sdhc_gap_write;
+        }
+    }
+}
+
+static inline void sdhci_reset_write(SDHCIState *s, uint8_t value)
+{
+    switch (value) {
+    case SDHC_RESET_ALL:
+        DEVICE_GET_CLASS(s)->reset(DEVICE(s));
+        break;
+    case SDHC_RESET_CMD:
+        s->prnsts &= ~SDHC_CMD_INHIBIT;
+        s->norintsts &= ~SDHC_NIS_CMDCMP;
+        break;
+    case SDHC_RESET_DATA:
+        s->data_count = 0;
+        s->prnsts &= ~(SDHC_SPACE_AVAILABLE | SDHC_DATA_AVAILABLE |
+                SDHC_DOING_READ | SDHC_DOING_WRITE |
+                SDHC_DATA_INHIBIT | SDHC_DAT_LINE_ACTIVE);
+        s->blkgap &= ~(SDHC_STOP_AT_GAP_REQ | SDHC_CONTINUE_REQ);
+        s->stopped_state = sdhc_not_stopped;
+        s->norintsts &= ~(SDHC_NIS_WBUFRDY | SDHC_NIS_RBUFRDY |
+                SDHC_NIS_DMA | SDHC_NIS_TRSCMP | SDHC_NIS_BLKGAP);
+        break;
+    }
+}
+
+static void
+sdhci_write(SDHCIState *s, unsigned int offset, uint32_t value, unsigned size)
+{
+    unsigned shift =  8 * (offset & 0x3);
+    uint32_t mask = ~(((1ULL << (size * 8)) - 1) << shift);
+    value <<= shift;
+
+    switch (offset & ~0x3) {
+    case SDHC_SYSAD:
+        s->sdmasysad = (s->sdmasysad & mask) | value;
+        MASKED_WRITE(s->sdmasysad, mask, value);
+        /* Writing to last byte of sdmasysad might trigger transfer */
+        if (!(mask & 0xFF000000) && TRANSFERRING_DATA(s->prnsts) && s->blkcnt &&
+                s->blksize && SDHC_DMA_TYPE(s->hostctl) == SDHC_CTRL_SDMA) {
+            SDHCI_GET_CLASS(s)->do_sdma_multi(s);
+        }
+        break;
+    case SDHC_BLKSIZE:
+        if (!TRANSFERRING_DATA(s->prnsts)) {
+            MASKED_WRITE(s->blksize, mask, value);
+            MASKED_WRITE(s->blkcnt, mask >> 16, value >> 16);
+        }
+        break;
+    case SDHC_ARGUMENT:
+        MASKED_WRITE(s->argument, mask, value);
+        break;
+    case SDHC_TRNMOD:
+        /* DMA can be enabled only if it is supported as indicated by
+         * capabilities register */
+        if (!(s->capareg & SDHC_CAN_DO_DMA)) {
+            value &= ~SDHC_TRNS_DMA;
+        }
+        MASKED_WRITE(s->trnmod, mask, value);
+        MASKED_WRITE(s->cmdreg, mask >> 16, value >> 16);
+
+        /* Writing to the upper byte of CMDREG triggers SD command generation */
+        if ((mask & 0xFF000000) || !SDHCI_GET_CLASS(s)->can_issue_command(s)) {
+            break;
+        }
+
+        SDHCI_GET_CLASS(s)->send_command(s);
+        break;
+    case  SDHC_BDATA:
+        if (sdhci_buff_access_is_sequential(s, offset - SDHC_BDATA)) {
+            SDHCI_GET_CLASS(s)->bdata_write(s, value >> shift, size);
+        }
+        break;
+    case SDHC_HOSTCTL:
+        if (!(mask & 0xFF0000)) {
+            sdhci_blkgap_write(s, value >> 16);
+        }
+        MASKED_WRITE(s->hostctl, mask, value);
+        MASKED_WRITE(s->pwrcon, mask >> 8, value >> 8);
+        MASKED_WRITE(s->wakcon, mask >> 24, value >> 24);
+        if (!(s->prnsts & SDHC_CARD_PRESENT) || ((s->pwrcon >> 1) & 0x7) < 5 ||
+                !(s->capareg & (1 << (31 - ((s->pwrcon >> 1) & 0x7))))) {
+            s->pwrcon &= ~SDHC_POWER_ON;
+        }
+        break;
+    case SDHC_CLKCON:
+        if (!(mask & 0xFF000000)) {
+            sdhci_reset_write(s, value >> 24);
+        }
+        MASKED_WRITE(s->clkcon, mask, value);
+        MASKED_WRITE(s->timeoutcon, mask >> 16, value >> 16);
+        if (s->clkcon & SDHC_CLOCK_INT_EN) {
+            s->clkcon |= SDHC_CLOCK_INT_STABLE;
+        } else {
+            s->clkcon &= ~SDHC_CLOCK_INT_STABLE;
+        }
+        break;
+    case SDHC_NORINTSTS:
+        if (s->norintstsen & SDHC_NISEN_CARDINT) {
+            value &= ~SDHC_NIS_CARDINT;
+        }
+        s->norintsts &= mask | ~value;
+        s->errintsts &= (mask >> 16) | ~(value >> 16);
+        if (s->errintsts) {
+            s->norintsts |= SDHC_NIS_ERR;
+        } else {
+            s->norintsts &= ~SDHC_NIS_ERR;
+        }
+        sdhci_update_irq(s);
+        break;
+    case SDHC_NORINTSTSEN:
+        MASKED_WRITE(s->norintstsen, mask, value);
+        MASKED_WRITE(s->errintstsen, mask >> 16, value >> 16);
+        s->norintsts &= s->norintstsen;
+        s->errintsts &= s->errintstsen;
+        if (s->errintsts) {
+            s->norintsts |= SDHC_NIS_ERR;
+        } else {
+            s->norintsts &= ~SDHC_NIS_ERR;
+        }
+        sdhci_update_irq(s);
+        break;
+    case SDHC_NORINTSIGEN:
+        MASKED_WRITE(s->norintsigen, mask, value);
+        MASKED_WRITE(s->errintsigen, mask >> 16, value >> 16);
+        sdhci_update_irq(s);
+        break;
+    case SDHC_ADMAERR:
+        MASKED_WRITE(s->admaerr, mask, value);
+        break;
+    case SDHC_ADMASYSADDR:
+        s->admasysaddr = (s->admasysaddr & (0xFFFFFFFF00000000ULL |
+                (uint64_t)mask)) | (uint64_t)value;
+        break;
+    case SDHC_ADMASYSADDR + 4:
+        s->admasysaddr = (s->admasysaddr & (0x00000000FFFFFFFFULL |
+                ((uint64_t)mask << 32))) | ((uint64_t)value << 32);
+        break;
+    case SDHC_FEAER:
+        s->acmd12errsts |= value;
+        s->errintsts |= (value >> 16) & s->errintstsen;
+        if (s->acmd12errsts) {
+            s->errintsts |= SDHC_EIS_CMD12ERR;
+        }
+        if (s->errintsts) {
+            s->norintsts |= SDHC_NIS_ERR;
+        }
+        sdhci_update_irq(s);
+        break;
+    default:
+        ERRPRINT("bad %ub write offset: addr[0x%04x] <- %u(0x%x)\n",
+                size, offset, value >> shift, value >> shift);
+        break;
+    }
+    DPRINT_L2("write %ub: addr[0x%04x] <- %u(0x%x)\n",
+            size, offset, value >> shift, value >> shift);
+}
+
+static uint64_t
+sdhci_readfn(void *opaque, hwaddr offset, unsigned size)
+{
+    SDHCIState *s = (SDHCIState *)opaque;
+
+    return SDHCI_GET_CLASS(s)->mem_read(s, offset, size);
+}
+
+static void
+sdhci_writefn(void *opaque, hwaddr off, uint64_t val, unsigned sz)
+{
+    SDHCIState *s = (SDHCIState *)opaque;
+
+    SDHCI_GET_CLASS(s)->mem_write(s, off, val, sz);
+}
+
+static const MemoryRegionOps sdhci_mmio_ops = {
+    .read = sdhci_readfn,
+    .write = sdhci_writefn,
+    .valid = {
+        .min_access_size = 1,
+        .max_access_size = 4,
+        .unaligned = false
+    },
+    .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static inline unsigned int sdhci_get_fifolen(SDHCIState *s)
+{
+    switch (SDHC_CAPAB_BLOCKSIZE(s->capareg)) {
+    case 0:
+        return 512;
+    case 1:
+        return 1024;
+    case 2:
+        return 2048;
+    default:
+        hw_error("SDHC: unsupported value for maximum block size\n");
+        return 0;
+    }
+}
+
+static void sdhci_initfn(Object *obj)
+{
+    SDHCIState *s = SDHCI(obj);
+    DriveInfo *di;
+
+    di = drive_get_next(IF_SD);
+    s->card = sd_init(di ? di->bdrv : NULL, 0);
+    s->eject_cb = qemu_allocate_irqs(sdhci_insert_eject_cb, s, 1)[0];
+    s->ro_cb = qemu_allocate_irqs(sdhci_card_readonly_cb, s, 1)[0];
+    sd_set_cb(s->card, s->ro_cb, s->eject_cb);
+
+    s->insert_timer = qemu_new_timer_ns(vm_clock, sdhci_raise_insertion_irq, s);
+    s->transfer_timer = qemu_new_timer_ns(vm_clock, sdhci_do_data_transfer, s);
+}
+
+static void sdhci_uninitfn(Object *obj)
+{
+    SDHCIState *s = SDHCI(obj);
+
+    qemu_del_timer(s->insert_timer);
+    qemu_free_timer(s->insert_timer);
+    qemu_del_timer(s->transfer_timer);
+    qemu_free_timer(s->transfer_timer);
+    qemu_free_irqs(&s->eject_cb);
+    qemu_free_irqs(&s->ro_cb);
+
+    if (s->fifo_buffer) {
+        g_free(s->fifo_buffer);
+        s->fifo_buffer = NULL;
+    }
+}
+
+const VMStateDescription sdhci_vmstate = {
+    .name = "sdhci",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields      = (VMStateField[]) {
+        VMSTATE_UINT32(sdmasysad, SDHCIState),
+        VMSTATE_UINT16(blksize, SDHCIState),
+        VMSTATE_UINT16(blkcnt, SDHCIState),
+        VMSTATE_UINT32(argument, SDHCIState),
+        VMSTATE_UINT16(trnmod, SDHCIState),
+        VMSTATE_UINT16(cmdreg, SDHCIState),
+        VMSTATE_UINT32_ARRAY(rspreg, SDHCIState, 4),
+        VMSTATE_UINT32(prnsts, SDHCIState),
+        VMSTATE_UINT8(hostctl, SDHCIState),
+        VMSTATE_UINT8(pwrcon, SDHCIState),
+        VMSTATE_UINT8(blkgap, SDHCIState),
+        VMSTATE_UINT8(wakcon, SDHCIState),
+        VMSTATE_UINT16(clkcon, SDHCIState),
+        VMSTATE_UINT8(timeoutcon, SDHCIState),
+        VMSTATE_UINT8(admaerr, SDHCIState),
+        VMSTATE_UINT16(norintsts, SDHCIState),
+        VMSTATE_UINT16(errintsts, SDHCIState),
+        VMSTATE_UINT16(norintstsen, SDHCIState),
+        VMSTATE_UINT16(errintstsen, SDHCIState),
+        VMSTATE_UINT16(norintsigen, SDHCIState),
+        VMSTATE_UINT16(errintsigen, SDHCIState),
+        VMSTATE_UINT16(acmd12errsts, SDHCIState),
+        VMSTATE_UINT16(data_count, SDHCIState),
+        VMSTATE_UINT64(admasysaddr, SDHCIState),
+        VMSTATE_UINT8(stopped_state, SDHCIState),
+        VMSTATE_VBUFFER_UINT32(fifo_buffer, SDHCIState, 1, NULL, 0, buf_maxsz),
+        VMSTATE_TIMER(insert_timer, SDHCIState),
+        VMSTATE_TIMER(transfer_timer, SDHCIState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+/* Capabilities registers provide information on supported features of this
+ * specific host controller implementation */
+static Property sdhci_properties[] = {
+    DEFINE_PROP_HEX32("capareg", SDHCIState, capareg,
+            SDHC_CAPAB_REG_DEFAULT),
+    DEFINE_PROP_HEX32("maxcurr", SDHCIState, maxcurr, 0),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void sdhci_realize(DeviceState *dev, Error ** errp)
+{
+    SDHCIState *s = SDHCI(dev);
+    SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
+
+    s->buf_maxsz = sdhci_get_fifolen(s);
+    s->fifo_buffer = g_malloc0(s->buf_maxsz);
+    sysbus_init_irq(sbd, &s->irq);
+    memory_region_init_io(&s->iomem, &sdhci_mmio_ops, s, "sdhci",
+            SDHC_REGISTERS_MAP_SIZE);
+    sysbus_init_mmio(sbd, &s->iomem);
+}
+
+static void sdhci_generic_reset(DeviceState *ds)
+{
+    SDHCIState *s = SDHCI(ds);
+    SDHCI_GET_CLASS(s)->reset(s);
+}
+
+static void sdhci_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    SDHCIClass *k = SDHCI_CLASS(klass);
+
+    dc->vmsd = &sdhci_vmstate;
+    dc->props = sdhci_properties;
+    dc->reset = sdhci_generic_reset;
+    dc->realize = sdhci_realize;
+
+    k->reset = sdhci_reset;
+    k->mem_read = sdhci_read;
+    k->mem_write = sdhci_write;
+    k->send_command = sdhci_send_command;
+    k->can_issue_command = sdhci_can_issue_command;
+    k->data_transfer = sdhci_data_transfer;
+    k->end_data_transfer = sdhci_end_transfer;
+    k->do_sdma_single = sdhci_sdma_transfer_single_block;
+    k->do_sdma_multi = sdhci_sdma_transfer_multi_blocks;
+    k->do_adma = sdhci_do_adma;
+    k->read_block_from_card = sdhci_read_block_from_card;
+    k->write_block_to_card = sdhci_write_block_to_card;
+    k->bdata_read = sdhci_read_dataport;
+    k->bdata_write = sdhci_write_dataport;
+}
+
+static const TypeInfo sdhci_type_info = {
+    .name = TYPE_SDHCI,
+    .parent = TYPE_SYS_BUS_DEVICE,
+    .instance_size = sizeof(SDHCIState),
+    .instance_init = sdhci_initfn,
+    .instance_finalize = sdhci_uninitfn,
+    .class_init = sdhci_class_init,
+    .class_size = sizeof(SDHCIClass)
+};
+
+static void sdhci_register_types(void)
+{
+    type_register_static(&sdhci_type_info);
+}
+
+type_init(sdhci_register_types)
diff --git a/hw/sd/ssi-sd.c b/hw/sd/ssi-sd.c
new file mode 100644
index 0000000..4d3c4f6
--- /dev/null
+++ b/hw/sd/ssi-sd.c
@@ -0,0 +1,274 @@
+/*
+ * SSI to SD card adapter.
+ *
+ * Copyright (c) 2007-2009 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licensed under the GNU GPL v2.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "sysemu/blockdev.h"
+#include "hw/ssi.h"
+#include "hw/sd.h"
+
+//#define DEBUG_SSI_SD 1
+
+#ifdef DEBUG_SSI_SD
+#define DPRINTF(fmt, ...) \
+do { printf("ssi_sd: " fmt , ## __VA_ARGS__); } while (0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "ssi_sd: error: " fmt , ## __VA_ARGS__); exit(1);} while (0)
+#else
+#define DPRINTF(fmt, ...) do {} while(0)
+#define BADF(fmt, ...) \
+do { fprintf(stderr, "ssi_sd: error: " fmt , ## __VA_ARGS__);} while (0)
+#endif
+
+typedef enum {
+    SSI_SD_CMD,
+    SSI_SD_CMDARG,
+    SSI_SD_RESPONSE,
+    SSI_SD_DATA_START,
+    SSI_SD_DATA_READ,
+} ssi_sd_mode;
+
+typedef struct {
+    SSISlave ssidev;
+    ssi_sd_mode mode;
+    int cmd;
+    uint8_t cmdarg[4];
+    uint8_t response[5];
+    int arglen;
+    int response_pos;
+    int stopping;
+    SDState *sd;
+} ssi_sd_state;
+
+/* State word bits.  */
+#define SSI_SDR_LOCKED          0x0001
+#define SSI_SDR_WP_ERASE        0x0002
+#define SSI_SDR_ERROR           0x0004
+#define SSI_SDR_CC_ERROR        0x0008
+#define SSI_SDR_ECC_FAILED      0x0010
+#define SSI_SDR_WP_VIOLATION    0x0020
+#define SSI_SDR_ERASE_PARAM     0x0040
+#define SSI_SDR_OUT_OF_RANGE    0x0080
+#define SSI_SDR_IDLE            0x0100
+#define SSI_SDR_ERASE_RESET     0x0200
+#define SSI_SDR_ILLEGAL_COMMAND 0x0400
+#define SSI_SDR_COM_CRC_ERROR   0x0800
+#define SSI_SDR_ERASE_SEQ_ERROR 0x1000
+#define SSI_SDR_ADDRESS_ERROR   0x2000
+#define SSI_SDR_PARAMETER_ERROR 0x4000
+
+static uint32_t ssi_sd_transfer(SSISlave *dev, uint32_t val)
+{
+    ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, dev);
+
+    /* Special case: allow CMD12 (STOP TRANSMISSION) while reading data.  */
+    if (s->mode == SSI_SD_DATA_READ && val == 0x4d) {
+        s->mode = SSI_SD_CMD;
+        /* There must be at least one byte delay before the card responds.  */
+        s->stopping = 1;
+    }
+
+    switch (s->mode) {
+    case SSI_SD_CMD:
+        if (val == 0xff) {
+            DPRINTF("NULL command\n");
+            return 0xff;
+        }
+        s->cmd = val & 0x3f;
+        s->mode = SSI_SD_CMDARG;
+        s->arglen = 0;
+        return 0xff;
+    case SSI_SD_CMDARG:
+        if (s->arglen == 4) {
+            SDRequest request;
+            uint8_t longresp[16];
+            /* FIXME: Check CRC.  */
+            request.cmd = s->cmd;
+            request.arg = (s->cmdarg[0] << 24) | (s->cmdarg[1] << 16)
+                           | (s->cmdarg[2] << 8) | s->cmdarg[3];
+            DPRINTF("CMD%d arg 0x%08x\n", s->cmd, request.arg);
+            s->arglen = sd_do_command(s->sd, &request, longresp);
+            if (s->arglen <= 0) {
+                s->arglen = 1;
+                s->response[0] = 4;
+                DPRINTF("SD command failed\n");
+            } else if (s->cmd == 58) {
+                /* CMD58 returns R3 response (OCR)  */
+                DPRINTF("Returned OCR\n");
+                s->arglen = 5;
+                s->response[0] = 1;
+                memcpy(&s->response[1], longresp, 4);
+            } else if (s->arglen != 4) {
+                BADF("Unexpected response to cmd %d\n", s->cmd);
+                /* Illegal command is about as near as we can get.  */
+                s->arglen = 1;
+                s->response[0] = 4;
+            } else {
+                /* All other commands return status.  */
+                uint32_t cardstatus;
+                uint16_t status;
+                /* CMD13 returns a 2-byte statuse work. Other commands
+                   only return the first byte.  */
+                s->arglen = (s->cmd == 13) ? 2 : 1;
+                cardstatus = (longresp[0] << 24) | (longresp[1] << 16)
+                             | (longresp[2] << 8) | longresp[3];
+                status = 0;
+                if (((cardstatus >> 9) & 0xf) < 4)
+                    status |= SSI_SDR_IDLE;
+                if (cardstatus & ERASE_RESET)
+                    status |= SSI_SDR_ERASE_RESET;
+                if (cardstatus & ILLEGAL_COMMAND)
+                    status |= SSI_SDR_ILLEGAL_COMMAND;
+                if (cardstatus & COM_CRC_ERROR)
+                    status |= SSI_SDR_COM_CRC_ERROR;
+                if (cardstatus & ERASE_SEQ_ERROR)
+                    status |= SSI_SDR_ERASE_SEQ_ERROR;
+                if (cardstatus & ADDRESS_ERROR)
+                    status |= SSI_SDR_ADDRESS_ERROR;
+                if (cardstatus & CARD_IS_LOCKED)
+                    status |= SSI_SDR_LOCKED;
+                if (cardstatus & (LOCK_UNLOCK_FAILED | WP_ERASE_SKIP))
+                    status |= SSI_SDR_WP_ERASE;
+                if (cardstatus & SD_ERROR)
+                    status |= SSI_SDR_ERROR;
+                if (cardstatus & CC_ERROR)
+                    status |= SSI_SDR_CC_ERROR;
+                if (cardstatus & CARD_ECC_FAILED)
+                    status |= SSI_SDR_ECC_FAILED;
+                if (cardstatus & WP_VIOLATION)
+                    status |= SSI_SDR_WP_VIOLATION;
+                if (cardstatus & ERASE_PARAM)
+                    status |= SSI_SDR_ERASE_PARAM;
+                if (cardstatus & (OUT_OF_RANGE | CID_CSD_OVERWRITE))
+                    status |= SSI_SDR_OUT_OF_RANGE;
+                /* ??? Don't know what Parameter Error really means, so
+                   assume it's set if the second byte is nonzero.  */
+                if (status & 0xff)
+                    status |= SSI_SDR_PARAMETER_ERROR;
+                s->response[0] = status >> 8;
+                s->response[1] = status;
+                DPRINTF("Card status 0x%02x\n", status);
+            }
+            s->mode = SSI_SD_RESPONSE;
+            s->response_pos = 0;
+        } else {
+            s->cmdarg[s->arglen++] = val;
+        }
+        return 0xff;
+    case SSI_SD_RESPONSE:
+        if (s->stopping) {
+            s->stopping = 0;
+            return 0xff;
+        }
+        if (s->response_pos < s->arglen) {
+            DPRINTF("Response 0x%02x\n", s->response[s->response_pos]);
+            return s->response[s->response_pos++];
+        }
+        if (sd_data_ready(s->sd)) {
+            DPRINTF("Data read\n");
+            s->mode = SSI_SD_DATA_START;
+        } else {
+            DPRINTF("End of command\n");
+            s->mode = SSI_SD_CMD;
+        }
+        return 0xff;
+    case SSI_SD_DATA_START:
+        DPRINTF("Start read block\n");
+        s->mode = SSI_SD_DATA_READ;
+        return 0xfe;
+    case SSI_SD_DATA_READ:
+        val = sd_read_data(s->sd);
+        if (!sd_data_ready(s->sd)) {
+            DPRINTF("Data read end\n");
+            s->mode = SSI_SD_CMD;
+        }
+        return val;
+    }
+    /* Should never happen.  */
+    return 0xff;
+}
+
+static void ssi_sd_save(QEMUFile *f, void *opaque)
+{
+    SSISlave *ss = SSI_SLAVE(opaque);
+    ssi_sd_state *s = (ssi_sd_state *)opaque;
+    int i;
+
+    qemu_put_be32(f, s->mode);
+    qemu_put_be32(f, s->cmd);
+    for (i = 0; i < 4; i++)
+        qemu_put_be32(f, s->cmdarg[i]);
+    for (i = 0; i < 5; i++)
+        qemu_put_be32(f, s->response[i]);
+    qemu_put_be32(f, s->arglen);
+    qemu_put_be32(f, s->response_pos);
+    qemu_put_be32(f, s->stopping);
+
+    qemu_put_be32(f, ss->cs);
+}
+
+static int ssi_sd_load(QEMUFile *f, void *opaque, int version_id)
+{
+    SSISlave *ss = SSI_SLAVE(opaque);
+    ssi_sd_state *s = (ssi_sd_state *)opaque;
+    int i;
+
+    if (version_id != 1)
+        return -EINVAL;
+
+    s->mode = qemu_get_be32(f);
+    s->cmd = qemu_get_be32(f);
+    for (i = 0; i < 4; i++)
+        s->cmdarg[i] = qemu_get_be32(f);
+    for (i = 0; i < 5; i++)
+        s->response[i] = qemu_get_be32(f);
+    s->arglen = qemu_get_be32(f);
+    s->response_pos = qemu_get_be32(f);
+    s->stopping = qemu_get_be32(f);
+
+    ss->cs = qemu_get_be32(f);
+
+    return 0;
+}
+
+static int ssi_sd_init(SSISlave *dev)
+{
+    ssi_sd_state *s = FROM_SSI_SLAVE(ssi_sd_state, dev);
+    DriveInfo *dinfo;
+
+    s->mode = SSI_SD_CMD;
+    dinfo = drive_get_next(IF_SD);
+    s->sd = sd_init(dinfo ? dinfo->bdrv : NULL, 1);
+    register_savevm(&dev->qdev, "ssi_sd", -1, 1, ssi_sd_save, ssi_sd_load, s);
+    return 0;
+}
+
+static void ssi_sd_class_init(ObjectClass *klass, void *data)
+{
+    SSISlaveClass *k = SSI_SLAVE_CLASS(klass);
+
+    k->init = ssi_sd_init;
+    k->transfer = ssi_sd_transfer;
+    k->cs_polarity = SSI_CS_LOW;
+}
+
+static const TypeInfo ssi_sd_info = {
+    .name          = "ssi-sd",
+    .parent        = TYPE_SSI_SLAVE,
+    .instance_size = sizeof(ssi_sd_state),
+    .class_init    = ssi_sd_class_init,
+};
+
+static void ssi_sd_register_types(void)
+{
+    type_register_static(&ssi_sd_info);
+}
+
+type_init(ssi_sd_register_types)