hw: move DMA controllers to hw/dma/, configure with default-configs/

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

1 files changed, 2101 insertions, 0 deletions

diff --git a/hw/dma/omap_dma.c b/hw/dma/omap_dma.c
new file mode 100644
index 0000000000..184fcee1a7
--- /dev/null
+++ b/hw/dma/omap_dma.c
@@ -0,0 +1,2101 @@
+/*
+ * TI OMAP DMA gigacell.
+ *
+ * Copyright (C) 2006-2008 Andrzej Zaborowski  <balrog@zabor.org>
+ * Copyright (C) 2007-2008 Lauro Ramos Venancio  <lauro.venancio@indt.org.br>
+ *
+ * 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 "qemu-common.h"
+#include "qemu/timer.h"
+#include "hw/arm/omap.h"
+#include "hw/irq.h"
+#include "hw/arm/soc_dma.h"
+
+struct omap_dma_channel_s {
+    /* transfer data */
+    int burst[2];
+    int pack[2];
+    int endian[2];
+    int endian_lock[2];
+    int translate[2];
+    enum omap_dma_port port[2];
+    hwaddr addr[2];
+    omap_dma_addressing_t mode[2];
+    uint32_t elements;
+    uint16_t frames;
+    int32_t frame_index[2];
+    int16_t element_index[2];
+    int data_type;
+
+    /* transfer type */
+    int transparent_copy;
+    int constant_fill;
+    uint32_t color;
+    int prefetch;
+
+    /* auto init and linked channel data */
+    int end_prog;
+    int repeat;
+    int auto_init;
+    int link_enabled;
+    int link_next_ch;
+
+    /* interruption data */
+    int interrupts;
+    int status;
+    int cstatus;
+
+    /* state data */
+    int active;
+    int enable;
+    int sync;
+    int src_sync;
+    int pending_request;
+    int waiting_end_prog;
+    uint16_t cpc;
+    int set_update;
+
+    /* sync type */
+    int fs;
+    int bs;
+
+    /* compatibility */
+    int omap_3_1_compatible_disable;
+
+    qemu_irq irq;
+    struct omap_dma_channel_s *sibling;
+
+    struct omap_dma_reg_set_s {
+        hwaddr src, dest;
+        int frame;
+        int element;
+        int pck_element;
+        int frame_delta[2];
+        int elem_delta[2];
+        int frames;
+        int elements;
+        int pck_elements;
+    } active_set;
+
+    struct soc_dma_ch_s *dma;
+
+    /* unused parameters */
+    int write_mode;
+    int priority;
+    int interleave_disabled;
+    int type;
+    int suspend;
+    int buf_disable;
+};
+
+struct omap_dma_s {
+    struct soc_dma_s *dma;
+    MemoryRegion iomem;
+
+    struct omap_mpu_state_s *mpu;
+    omap_clk clk;
+    qemu_irq irq[4];
+    void (*intr_update)(struct omap_dma_s *s);
+    enum omap_dma_model model;
+    int omap_3_1_mapping_disabled;
+
+    uint32_t gcr;
+    uint32_t ocp;
+    uint32_t caps[5];
+    uint32_t irqen[4];
+    uint32_t irqstat[4];
+
+    int chans;
+    struct omap_dma_channel_s ch[32];
+    struct omap_dma_lcd_channel_s lcd_ch;
+};
+
+/* Interrupts */
+#define TIMEOUT_INTR    (1 << 0)
+#define EVENT_DROP_INTR (1 << 1)
+#define HALF_FRAME_INTR (1 << 2)
+#define END_FRAME_INTR  (1 << 3)
+#define LAST_FRAME_INTR (1 << 4)
+#define END_BLOCK_INTR  (1 << 5)
+#define SYNC            (1 << 6)
+#define END_PKT_INTR	(1 << 7)
+#define TRANS_ERR_INTR	(1 << 8)
+#define MISALIGN_INTR	(1 << 11)
+
+static inline void omap_dma_interrupts_update(struct omap_dma_s *s)
+{
+    return s->intr_update(s);
+}
+
+static void omap_dma_channel_load(struct omap_dma_channel_s *ch)
+{
+    struct omap_dma_reg_set_s *a = &ch->active_set;
+    int i, normal;
+    int omap_3_1 = !ch->omap_3_1_compatible_disable;
+
+    /*
+     * TODO: verify address ranges and alignment
+     * TODO: port endianness
+     */
+
+    a->src = ch->addr[0];
+    a->dest = ch->addr[1];
+    a->frames = ch->frames;
+    a->elements = ch->elements;
+    a->pck_elements = ch->frame_index[!ch->src_sync];
+    a->frame = 0;
+    a->element = 0;
+    a->pck_element = 0;
+
+    if (unlikely(!ch->elements || !ch->frames)) {
+        printf("%s: bad DMA request\n", __FUNCTION__);
+        return;
+    }
+
+    for (i = 0; i < 2; i ++)
+        switch (ch->mode[i]) {
+        case constant:
+            a->elem_delta[i] = 0;
+            a->frame_delta[i] = 0;
+            break;
+        case post_incremented:
+            a->elem_delta[i] = ch->data_type;
+            a->frame_delta[i] = 0;
+            break;
+        case single_index:
+            a->elem_delta[i] = ch->data_type +
+                    ch->element_index[omap_3_1 ? 0 : i] - 1;
+            a->frame_delta[i] = 0;
+            break;
+        case double_index:
+            a->elem_delta[i] = ch->data_type +
+                    ch->element_index[omap_3_1 ? 0 : i] - 1;
+            a->frame_delta[i] = ch->frame_index[omap_3_1 ? 0 : i] -
+                    ch->element_index[omap_3_1 ? 0 : i];
+            break;
+        default:
+            break;
+        }
+
+    normal = !ch->transparent_copy && !ch->constant_fill &&
+            /* FIFO is big-endian so either (ch->endian[n] == 1) OR
+             * (ch->endian_lock[n] == 1) mean no endianism conversion.  */
+            (ch->endian[0] | ch->endian_lock[0]) ==
+            (ch->endian[1] | ch->endian_lock[1]);
+    for (i = 0; i < 2; i ++) {
+        /* TODO: for a->frame_delta[i] > 0 still use the fast path, just
+         * limit min_elems in omap_dma_transfer_setup to the nearest frame
+         * end.  */
+        if (!a->elem_delta[i] && normal &&
+                        (a->frames == 1 || !a->frame_delta[i]))
+            ch->dma->type[i] = soc_dma_access_const;
+        else if (a->elem_delta[i] == ch->data_type && normal &&
+                        (a->frames == 1 || !a->frame_delta[i]))
+            ch->dma->type[i] = soc_dma_access_linear;
+        else
+            ch->dma->type[i] = soc_dma_access_other;
+
+        ch->dma->vaddr[i] = ch->addr[i];
+    }
+    soc_dma_ch_update(ch->dma);
+}
+
+static void omap_dma_activate_channel(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch)
+{
+    if (!ch->active) {
+        if (ch->set_update) {
+            /* It's not clear when the active set is supposed to be
+             * loaded from registers.  We're already loading it when the
+             * channel is enabled, and for some guests this is not enough
+             * but that may be also because of a race condition (no
+             * delays in qemu) in the guest code, which we're just
+             * working around here.  */
+            omap_dma_channel_load(ch);
+            ch->set_update = 0;
+        }
+
+        ch->active = 1;
+        soc_dma_set_request(ch->dma, 1);
+        if (ch->sync)
+            ch->status |= SYNC;
+    }
+}
+
+static void omap_dma_deactivate_channel(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch)
+{
+    /* Update cpc */
+    ch->cpc = ch->active_set.dest & 0xffff;
+
+    if (ch->pending_request && !ch->waiting_end_prog && ch->enable) {
+        /* Don't deactivate the channel */
+        ch->pending_request = 0;
+        return;
+    }
+
+    /* Don't deactive the channel if it is synchronized and the DMA request is
+       active */
+    if (ch->sync && ch->enable && (s->dma->drqbmp & (1 << ch->sync)))
+        return;
+
+    if (ch->active) {
+        ch->active = 0;
+        ch->status &= ~SYNC;
+        soc_dma_set_request(ch->dma, 0);
+    }
+}
+
+static void omap_dma_enable_channel(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch)
+{
+    if (!ch->enable) {
+        ch->enable = 1;
+        ch->waiting_end_prog = 0;
+        omap_dma_channel_load(ch);
+        /* TODO: theoretically if ch->sync && ch->prefetch &&
+         * !s->dma->drqbmp[ch->sync], we should also activate and fetch
+         * from source and then stall until signalled.  */
+        if ((!ch->sync) || (s->dma->drqbmp & (1 << ch->sync)))
+            omap_dma_activate_channel(s, ch);
+    }
+}
+
+static void omap_dma_disable_channel(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch)
+{
+    if (ch->enable) {
+        ch->enable = 0;
+        /* Discard any pending request */
+        ch->pending_request = 0;
+        omap_dma_deactivate_channel(s, ch);
+    }
+}
+
+static void omap_dma_channel_end_prog(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch)
+{
+    if (ch->waiting_end_prog) {
+        ch->waiting_end_prog = 0;
+        if (!ch->sync || ch->pending_request) {
+            ch->pending_request = 0;
+            omap_dma_activate_channel(s, ch);
+        }
+    }
+}
+
+static void omap_dma_interrupts_3_1_update(struct omap_dma_s *s)
+{
+    struct omap_dma_channel_s *ch = s->ch;
+
+    /* First three interrupts are shared between two channels each. */
+    if (ch[0].status | ch[6].status)
+        qemu_irq_raise(ch[0].irq);
+    if (ch[1].status | ch[7].status)
+        qemu_irq_raise(ch[1].irq);
+    if (ch[2].status | ch[8].status)
+        qemu_irq_raise(ch[2].irq);
+    if (ch[3].status)
+        qemu_irq_raise(ch[3].irq);
+    if (ch[4].status)
+        qemu_irq_raise(ch[4].irq);
+    if (ch[5].status)
+        qemu_irq_raise(ch[5].irq);
+}
+
+static void omap_dma_interrupts_3_2_update(struct omap_dma_s *s)
+{
+    struct omap_dma_channel_s *ch = s->ch;
+    int i;
+
+    for (i = s->chans; i; ch ++, i --)
+        if (ch->status)
+            qemu_irq_raise(ch->irq);
+}
+
+static void omap_dma_enable_3_1_mapping(struct omap_dma_s *s)
+{
+    s->omap_3_1_mapping_disabled = 0;
+    s->chans = 9;
+    s->intr_update = omap_dma_interrupts_3_1_update;
+}
+
+static void omap_dma_disable_3_1_mapping(struct omap_dma_s *s)
+{
+    s->omap_3_1_mapping_disabled = 1;
+    s->chans = 16;
+    s->intr_update = omap_dma_interrupts_3_2_update;
+}
+
+static void omap_dma_process_request(struct omap_dma_s *s, int request)
+{
+    int channel;
+    int drop_event = 0;
+    struct omap_dma_channel_s *ch = s->ch;
+
+    for (channel = 0; channel < s->chans; channel ++, ch ++) {
+        if (ch->enable && ch->sync == request) {
+            if (!ch->active)
+                omap_dma_activate_channel(s, ch);
+            else if (!ch->pending_request)
+                ch->pending_request = 1;
+            else {
+                /* Request collision */
+                /* Second request received while processing other request */
+                ch->status |= EVENT_DROP_INTR;
+                drop_event = 1;
+            }
+        }
+    }
+
+    if (drop_event)
+        omap_dma_interrupts_update(s);
+}
+
+static void omap_dma_transfer_generic(struct soc_dma_ch_s *dma)
+{
+    uint8_t value[4];
+    struct omap_dma_channel_s *ch = dma->opaque;
+    struct omap_dma_reg_set_s *a = &ch->active_set;
+    int bytes = dma->bytes;
+#ifdef MULTI_REQ
+    uint16_t status = ch->status;
+#endif
+
+    do {
+        /* Transfer a single element */
+        /* FIXME: check the endianness */
+        if (!ch->constant_fill)
+            cpu_physical_memory_read(a->src, value, ch->data_type);
+        else
+            *(uint32_t *) value = ch->color;
+
+        if (!ch->transparent_copy || *(uint32_t *) value != ch->color)
+            cpu_physical_memory_write(a->dest, value, ch->data_type);
+
+        a->src += a->elem_delta[0];
+        a->dest += a->elem_delta[1];
+        a->element ++;
+
+#ifndef MULTI_REQ
+        if (a->element == a->elements) {
+            /* End of Frame */
+            a->element = 0;
+            a->src += a->frame_delta[0];
+            a->dest += a->frame_delta[1];
+            a->frame ++;
+
+            /* If the channel is async, update cpc */
+            if (!ch->sync)
+                ch->cpc = a->dest & 0xffff;
+        }
+    } while ((bytes -= ch->data_type));
+#else
+        /* If the channel is element synchronized, deactivate it */
+        if (ch->sync && !ch->fs && !ch->bs)
+            omap_dma_deactivate_channel(s, ch);
+
+        /* If it is the last frame, set the LAST_FRAME interrupt */
+        if (a->element == 1 && a->frame == a->frames - 1)
+            if (ch->interrupts & LAST_FRAME_INTR)
+                ch->status |= LAST_FRAME_INTR;
+
+        /* If the half of the frame was reached, set the HALF_FRAME
+           interrupt */
+        if (a->element == (a->elements >> 1))
+            if (ch->interrupts & HALF_FRAME_INTR)
+                ch->status |= HALF_FRAME_INTR;
+
+        if (ch->fs && ch->bs) {
+            a->pck_element ++;
+            /* Check if a full packet has beed transferred.  */
+            if (a->pck_element == a->pck_elements) {
+                a->pck_element = 0;
+
+                /* Set the END_PKT interrupt */
+                if ((ch->interrupts & END_PKT_INTR) && !ch->src_sync)
+                    ch->status |= END_PKT_INTR;
+
+                /* If the channel is packet-synchronized, deactivate it */
+                if (ch->sync)
+                    omap_dma_deactivate_channel(s, ch);
+            }
+        }
+
+        if (a->element == a->elements) {
+            /* End of Frame */
+            a->element = 0;
+            a->src += a->frame_delta[0];
+            a->dest += a->frame_delta[1];
+            a->frame ++;
+
+            /* If the channel is frame synchronized, deactivate it */
+            if (ch->sync && ch->fs && !ch->bs)
+                omap_dma_deactivate_channel(s, ch);
+
+            /* If the channel is async, update cpc */
+            if (!ch->sync)
+                ch->cpc = a->dest & 0xffff;
+
+            /* Set the END_FRAME interrupt */
+            if (ch->interrupts & END_FRAME_INTR)
+                ch->status |= END_FRAME_INTR;
+
+            if (a->frame == a->frames) {
+                /* End of Block */
+                /* Disable the channel */
+
+                if (ch->omap_3_1_compatible_disable) {
+                    omap_dma_disable_channel(s, ch);
+                    if (ch->link_enabled)
+                        omap_dma_enable_channel(s,
+                                        &s->ch[ch->link_next_ch]);
+                } else {
+                    if (!ch->auto_init)
+                        omap_dma_disable_channel(s, ch);
+                    else if (ch->repeat || ch->end_prog)
+                        omap_dma_channel_load(ch);
+                    else {
+                        ch->waiting_end_prog = 1;
+                        omap_dma_deactivate_channel(s, ch);
+                    }
+                }
+
+                if (ch->interrupts & END_BLOCK_INTR)
+                    ch->status |= END_BLOCK_INTR;
+            }
+        }
+    } while (status == ch->status && ch->active);
+
+    omap_dma_interrupts_update(s);
+#endif
+}
+
+enum {
+    omap_dma_intr_element_sync,
+    omap_dma_intr_last_frame,
+    omap_dma_intr_half_frame,
+    omap_dma_intr_frame,
+    omap_dma_intr_frame_sync,
+    omap_dma_intr_packet,
+    omap_dma_intr_packet_sync,
+    omap_dma_intr_block,
+    __omap_dma_intr_last,
+};
+
+static void omap_dma_transfer_setup(struct soc_dma_ch_s *dma)
+{
+    struct omap_dma_port_if_s *src_p, *dest_p;
+    struct omap_dma_reg_set_s *a;
+    struct omap_dma_channel_s *ch = dma->opaque;
+    struct omap_dma_s *s = dma->dma->opaque;
+    int frames, min_elems, elements[__omap_dma_intr_last];
+
+    a = &ch->active_set;
+
+    src_p = &s->mpu->port[ch->port[0]];
+    dest_p = &s->mpu->port[ch->port[1]];
+    if ((!ch->constant_fill && !src_p->addr_valid(s->mpu, a->src)) ||
+                    (!dest_p->addr_valid(s->mpu, a->dest))) {
+#if 0
+        /* Bus time-out */
+        if (ch->interrupts & TIMEOUT_INTR)
+            ch->status |= TIMEOUT_INTR;
+        omap_dma_deactivate_channel(s, ch);
+        continue;
+#endif
+        printf("%s: Bus time-out in DMA%i operation\n",
+                        __FUNCTION__, dma->num);
+    }
+
+    min_elems = INT_MAX;
+
+    /* Check all the conditions that terminate the transfer starting
+     * with those that can occur the soonest.  */
+#define INTR_CHECK(cond, id, nelements)	\
+    if (cond) {			\
+        elements[id] = nelements;	\
+        if (elements[id] < min_elems)	\
+            min_elems = elements[id];	\
+    } else				\
+        elements[id] = INT_MAX;
+
+    /* Elements */
+    INTR_CHECK(
+                    ch->sync && !ch->fs && !ch->bs,
+                    omap_dma_intr_element_sync,
+                    1)
+
+    /* Frames */
+    /* TODO: for transfers where entire frames can be read and written
+     * using memcpy() but a->frame_delta is non-zero, try to still do
+     * transfers using soc_dma but limit min_elems to a->elements - ...
+     * See also the TODO in omap_dma_channel_load.  */
+    INTR_CHECK(
+                    (ch->interrupts & LAST_FRAME_INTR) &&
+                    ((a->frame < a->frames - 1) || !a->element),
+                    omap_dma_intr_last_frame,
+                    (a->frames - a->frame - 2) * a->elements +
+                    (a->elements - a->element + 1))
+    INTR_CHECK(
+                    ch->interrupts & HALF_FRAME_INTR,
+                    omap_dma_intr_half_frame,
+                    (a->elements >> 1) +
+                    (a->element >= (a->elements >> 1) ? a->elements : 0) -
+                    a->element)
+    INTR_CHECK(
+                    ch->sync && ch->fs && (ch->interrupts & END_FRAME_INTR),
+                    omap_dma_intr_frame,
+                    a->elements - a->element)
+    INTR_CHECK(
+                    ch->sync && ch->fs && !ch->bs,
+                    omap_dma_intr_frame_sync,
+                    a->elements - a->element)
+
+    /* Packets */
+    INTR_CHECK(
+                    ch->fs && ch->bs &&
+                    (ch->interrupts & END_PKT_INTR) && !ch->src_sync,
+                    omap_dma_intr_packet,
+                    a->pck_elements - a->pck_element)
+    INTR_CHECK(
+                    ch->fs && ch->bs && ch->sync,
+                    omap_dma_intr_packet_sync,
+                    a->pck_elements - a->pck_element)
+
+    /* Blocks */
+    INTR_CHECK(
+                    1,
+                    omap_dma_intr_block,
+                    (a->frames - a->frame - 1) * a->elements +
+                    (a->elements - a->element))
+
+    dma->bytes = min_elems * ch->data_type;
+
+    /* Set appropriate interrupts and/or deactivate channels */
+
+#ifdef MULTI_REQ
+    /* TODO: should all of this only be done if dma->update, and otherwise
+     * inside omap_dma_transfer_generic below - check what's faster.  */
+    if (dma->update) {
+#endif
+
+        /* If the channel is element synchronized, deactivate it */
+        if (min_elems == elements[omap_dma_intr_element_sync])
+            omap_dma_deactivate_channel(s, ch);
+
+        /* If it is the last frame, set the LAST_FRAME interrupt */
+        if (min_elems == elements[omap_dma_intr_last_frame])
+            ch->status |= LAST_FRAME_INTR;
+
+        /* If exactly half of the frame was reached, set the HALF_FRAME
+           interrupt */
+        if (min_elems == elements[omap_dma_intr_half_frame])
+            ch->status |= HALF_FRAME_INTR;
+
+        /* If a full packet has been transferred, set the END_PKT interrupt */
+        if (min_elems == elements[omap_dma_intr_packet])
+            ch->status |= END_PKT_INTR;
+
+        /* If the channel is packet-synchronized, deactivate it */
+        if (min_elems == elements[omap_dma_intr_packet_sync])
+            omap_dma_deactivate_channel(s, ch);
+
+        /* If the channel is frame synchronized, deactivate it */
+        if (min_elems == elements[omap_dma_intr_frame_sync])
+            omap_dma_deactivate_channel(s, ch);
+
+        /* Set the END_FRAME interrupt */
+        if (min_elems == elements[omap_dma_intr_frame])
+            ch->status |= END_FRAME_INTR;
+
+        if (min_elems == elements[omap_dma_intr_block]) {
+            /* End of Block */
+            /* Disable the channel */
+
+            if (ch->omap_3_1_compatible_disable) {
+                omap_dma_disable_channel(s, ch);
+                if (ch->link_enabled)
+                    omap_dma_enable_channel(s, &s->ch[ch->link_next_ch]);
+            } else {
+                if (!ch->auto_init)
+                    omap_dma_disable_channel(s, ch);
+                else if (ch->repeat || ch->end_prog)
+                    omap_dma_channel_load(ch);
+                else {
+                    ch->waiting_end_prog = 1;
+                    omap_dma_deactivate_channel(s, ch);
+                }
+            }
+
+            if (ch->interrupts & END_BLOCK_INTR)
+                ch->status |= END_BLOCK_INTR;
+        }
+
+        /* Update packet number */
+        if (ch->fs && ch->bs) {
+            a->pck_element += min_elems;
+            a->pck_element %= a->pck_elements;
+        }
+
+        /* TODO: check if we really need to update anything here or perhaps we
+         * can skip part of this.  */
+#ifndef MULTI_REQ
+        if (dma->update) {
+#endif
+            a->element += min_elems;
+
+            frames = a->element / a->elements;
+            a->element = a->element % a->elements;
+            a->frame += frames;
+            a->src += min_elems * a->elem_delta[0] + frames * a->frame_delta[0];
+            a->dest += min_elems * a->elem_delta[1] + frames * a->frame_delta[1];
+
+            /* If the channel is async, update cpc */
+            if (!ch->sync && frames)
+                ch->cpc = a->dest & 0xffff;
+
+            /* TODO: if the destination port is IMIF or EMIFF, set the dirty
+             * bits on it.  */
+#ifndef MULTI_REQ
+        }
+#else
+    }
+#endif
+
+    omap_dma_interrupts_update(s);
+}
+
+void omap_dma_reset(struct soc_dma_s *dma)
+{
+    int i;
+    struct omap_dma_s *s = dma->opaque;
+
+    soc_dma_reset(s->dma);
+    if (s->model < omap_dma_4)
+        s->gcr = 0x0004;
+    else
+        s->gcr = 0x00010010;
+    s->ocp = 0x00000000;
+    memset(&s->irqstat, 0, sizeof(s->irqstat));
+    memset(&s->irqen, 0, sizeof(s->irqen));
+    s->lcd_ch.src = emiff;
+    s->lcd_ch.condition = 0;
+    s->lcd_ch.interrupts = 0;
+    s->lcd_ch.dual = 0;
+    if (s->model < omap_dma_4)
+        omap_dma_enable_3_1_mapping(s);
+    for (i = 0; i < s->chans; i ++) {
+        s->ch[i].suspend = 0;
+        s->ch[i].prefetch = 0;
+        s->ch[i].buf_disable = 0;
+        s->ch[i].src_sync = 0;
+        memset(&s->ch[i].burst, 0, sizeof(s->ch[i].burst));
+        memset(&s->ch[i].port, 0, sizeof(s->ch[i].port));
+        memset(&s->ch[i].mode, 0, sizeof(s->ch[i].mode));
+        memset(&s->ch[i].frame_index, 0, sizeof(s->ch[i].frame_index));
+        memset(&s->ch[i].element_index, 0, sizeof(s->ch[i].element_index));
+        memset(&s->ch[i].endian, 0, sizeof(s->ch[i].endian));
+        memset(&s->ch[i].endian_lock, 0, sizeof(s->ch[i].endian_lock));
+        memset(&s->ch[i].translate, 0, sizeof(s->ch[i].translate));
+        s->ch[i].write_mode = 0;
+        s->ch[i].data_type = 0;
+        s->ch[i].transparent_copy = 0;
+        s->ch[i].constant_fill = 0;
+        s->ch[i].color = 0x00000000;
+        s->ch[i].end_prog = 0;
+        s->ch[i].repeat = 0;
+        s->ch[i].auto_init = 0;
+        s->ch[i].link_enabled = 0;
+        if (s->model < omap_dma_4)
+            s->ch[i].interrupts = 0x0003;
+        else
+            s->ch[i].interrupts = 0x0000;
+        s->ch[i].status = 0;
+        s->ch[i].cstatus = 0;
+        s->ch[i].active = 0;
+        s->ch[i].enable = 0;
+        s->ch[i].sync = 0;
+        s->ch[i].pending_request = 0;
+        s->ch[i].waiting_end_prog = 0;
+        s->ch[i].cpc = 0x0000;
+        s->ch[i].fs = 0;
+        s->ch[i].bs = 0;
+        s->ch[i].omap_3_1_compatible_disable = 0;
+        memset(&s->ch[i].active_set, 0, sizeof(s->ch[i].active_set));
+        s->ch[i].priority = 0;
+        s->ch[i].interleave_disabled = 0;
+        s->ch[i].type = 0;
+    }
+}
+
+static int omap_dma_ch_reg_read(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch, int reg, uint16_t *value)
+{
+    switch (reg) {
+    case 0x00:	/* SYS_DMA_CSDP_CH0 */
+        *value = (ch->burst[1] << 14) |
+                (ch->pack[1] << 13) |
+                (ch->port[1] << 9) |
+                (ch->burst[0] << 7) |
+                (ch->pack[0] << 6) |
+                (ch->port[0] << 2) |
+                (ch->data_type >> 1);
+        break;
+
+    case 0x02:	/* SYS_DMA_CCR_CH0 */
+        if (s->model <= omap_dma_3_1)
+            *value = 0 << 10;			/* FIFO_FLUSH reads as 0 */
+        else
+            *value = ch->omap_3_1_compatible_disable << 10;
+        *value |= (ch->mode[1] << 14) |
+                (ch->mode[0] << 12) |
+                (ch->end_prog << 11) |
+                (ch->repeat << 9) |
+                (ch->auto_init << 8) |
+                (ch->enable << 7) |
+                (ch->priority << 6) |
+                (ch->fs << 5) | ch->sync;
+        break;
+
+    case 0x04:	/* SYS_DMA_CICR_CH0 */
+        *value = ch->interrupts;
+        break;
+
+    case 0x06:	/* SYS_DMA_CSR_CH0 */
+        *value = ch->status;
+        ch->status &= SYNC;
+        if (!ch->omap_3_1_compatible_disable && ch->sibling) {
+            *value |= (ch->sibling->status & 0x3f) << 6;
+            ch->sibling->status &= SYNC;
+        }
+        qemu_irq_lower(ch->irq);
+        break;
+
+    case 0x08:	/* SYS_DMA_CSSA_L_CH0 */
+        *value = ch->addr[0] & 0x0000ffff;
+        break;
+
+    case 0x0a:	/* SYS_DMA_CSSA_U_CH0 */
+        *value = ch->addr[0] >> 16;
+        break;
+
+    case 0x0c:	/* SYS_DMA_CDSA_L_CH0 */
+        *value = ch->addr[1] & 0x0000ffff;
+        break;
+
+    case 0x0e:	/* SYS_DMA_CDSA_U_CH0 */
+        *value = ch->addr[1] >> 16;
+        break;
+
+    case 0x10:	/* SYS_DMA_CEN_CH0 */
+        *value = ch->elements;
+        break;
+
+    case 0x12:	/* SYS_DMA_CFN_CH0 */
+        *value = ch->frames;
+        break;
+
+    case 0x14:	/* SYS_DMA_CFI_CH0 */
+        *value = ch->frame_index[0];
+        break;
+
+    case 0x16:	/* SYS_DMA_CEI_CH0 */
+        *value = ch->element_index[0];
+        break;
+
+    case 0x18:	/* SYS_DMA_CPC_CH0 or DMA_CSAC */
+        if (ch->omap_3_1_compatible_disable)
+            *value = ch->active_set.src & 0xffff;	/* CSAC */
+        else
+            *value = ch->cpc;
+        break;
+
+    case 0x1a:	/* DMA_CDAC */
+        *value = ch->active_set.dest & 0xffff;	/* CDAC */
+        break;
+
+    case 0x1c:	/* DMA_CDEI */
+        *value = ch->element_index[1];
+        break;
+
+    case 0x1e:	/* DMA_CDFI */
+        *value = ch->frame_index[1];
+        break;
+
+    case 0x20:	/* DMA_COLOR_L */
+        *value = ch->color & 0xffff;
+        break;
+
+    case 0x22:	/* DMA_COLOR_U */
+        *value = ch->color >> 16;
+        break;
+
+    case 0x24:	/* DMA_CCR2 */
+        *value = (ch->bs << 2) |
+                (ch->transparent_copy << 1) |
+                ch->constant_fill;
+        break;
+
+    case 0x28:	/* DMA_CLNK_CTRL */
+        *value = (ch->link_enabled << 15) |
+                (ch->link_next_ch & 0xf);
+        break;
+
+    case 0x2a:	/* DMA_LCH_CTRL */
+        *value = (ch->interleave_disabled << 15) |
+                ch->type;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_ch_reg_write(struct omap_dma_s *s,
+                struct omap_dma_channel_s *ch, int reg, uint16_t value)
+{
+    switch (reg) {
+    case 0x00:	/* SYS_DMA_CSDP_CH0 */
+        ch->burst[1] = (value & 0xc000) >> 14;
+        ch->pack[1] = (value & 0x2000) >> 13;
+        ch->port[1] = (enum omap_dma_port) ((value & 0x1e00) >> 9);
+        ch->burst[0] = (value & 0x0180) >> 7;
+        ch->pack[0] = (value & 0x0040) >> 6;
+        ch->port[0] = (enum omap_dma_port) ((value & 0x003c) >> 2);
+        ch->data_type = 1 << (value & 3);
+        if (ch->port[0] >= __omap_dma_port_last)
+            printf("%s: invalid DMA port %i\n", __FUNCTION__,
+                            ch->port[0]);
+        if (ch->port[1] >= __omap_dma_port_last)
+            printf("%s: invalid DMA port %i\n", __FUNCTION__,
+                            ch->port[1]);
+        if ((value & 3) == 3)
+            printf("%s: bad data_type for DMA channel\n", __FUNCTION__);
+        break;
+
+    case 0x02:	/* SYS_DMA_CCR_CH0 */
+        ch->mode[1] = (omap_dma_addressing_t) ((value & 0xc000) >> 14);
+        ch->mode[0] = (omap_dma_addressing_t) ((value & 0x3000) >> 12);
+        ch->end_prog = (value & 0x0800) >> 11;
+        if (s->model >= omap_dma_3_2)
+            ch->omap_3_1_compatible_disable  = (value >> 10) & 0x1;
+        ch->repeat = (value & 0x0200) >> 9;
+        ch->auto_init = (value & 0x0100) >> 8;
+        ch->priority = (value & 0x0040) >> 6;
+        ch->fs = (value & 0x0020) >> 5;
+        ch->sync = value & 0x001f;
+
+        if (value & 0x0080)
+            omap_dma_enable_channel(s, ch);
+        else
+            omap_dma_disable_channel(s, ch);
+
+        if (ch->end_prog)
+            omap_dma_channel_end_prog(s, ch);
+
+        break;
+
+    case 0x04:	/* SYS_DMA_CICR_CH0 */
+        ch->interrupts = value & 0x3f;
+        break;
+
+    case 0x06:	/* SYS_DMA_CSR_CH0 */
+        OMAP_RO_REG((hwaddr) reg);
+        break;
+
+    case 0x08:	/* SYS_DMA_CSSA_L_CH0 */
+        ch->addr[0] &= 0xffff0000;
+        ch->addr[0] |= value;
+        break;
+
+    case 0x0a:	/* SYS_DMA_CSSA_U_CH0 */
+        ch->addr[0] &= 0x0000ffff;
+        ch->addr[0] |= (uint32_t) value << 16;
+        break;
+
+    case 0x0c:	/* SYS_DMA_CDSA_L_CH0 */
+        ch->addr[1] &= 0xffff0000;
+        ch->addr[1] |= value;
+        break;
+
+    case 0x0e:	/* SYS_DMA_CDSA_U_CH0 */
+        ch->addr[1] &= 0x0000ffff;
+        ch->addr[1] |= (uint32_t) value << 16;
+        break;
+
+    case 0x10:	/* SYS_DMA_CEN_CH0 */
+        ch->elements = value;
+        break;
+
+    case 0x12:	/* SYS_DMA_CFN_CH0 */
+        ch->frames = value;
+        break;
+
+    case 0x14:	/* SYS_DMA_CFI_CH0 */
+        ch->frame_index[0] = (int16_t) value;
+        break;
+
+    case 0x16:	/* SYS_DMA_CEI_CH0 */
+        ch->element_index[0] = (int16_t) value;
+        break;
+
+    case 0x18:	/* SYS_DMA_CPC_CH0 or DMA_CSAC */
+        OMAP_RO_REG((hwaddr) reg);
+        break;
+
+    case 0x1c:	/* DMA_CDEI */
+        ch->element_index[1] = (int16_t) value;
+        break;
+
+    case 0x1e:	/* DMA_CDFI */
+        ch->frame_index[1] = (int16_t) value;
+        break;
+
+    case 0x20:	/* DMA_COLOR_L */
+        ch->color &= 0xffff0000;
+        ch->color |= value;
+        break;
+
+    case 0x22:	/* DMA_COLOR_U */
+        ch->color &= 0xffff;
+        ch->color |= value << 16;
+        break;
+
+    case 0x24:	/* DMA_CCR2 */
+        ch->bs = (value >> 2) & 0x1;
+        ch->transparent_copy = (value >> 1) & 0x1;
+        ch->constant_fill = value & 0x1;
+        break;
+
+    case 0x28:	/* DMA_CLNK_CTRL */
+        ch->link_enabled = (value >> 15) & 0x1;
+        if (value & (1 << 14)) {			/* Stop_Lnk */
+            ch->link_enabled = 0;
+            omap_dma_disable_channel(s, ch);
+        }
+        ch->link_next_ch = value & 0x1f;
+        break;
+
+    case 0x2a:	/* DMA_LCH_CTRL */
+        ch->interleave_disabled = (value >> 15) & 0x1;
+        ch->type = value & 0xf;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_3_2_lcd_write(struct omap_dma_lcd_channel_s *s, int offset,
+                uint16_t value)
+{
+    switch (offset) {
+    case 0xbc0:	/* DMA_LCD_CSDP */
+        s->brust_f2 = (value >> 14) & 0x3;
+        s->pack_f2 = (value >> 13) & 0x1;
+        s->data_type_f2 = (1 << ((value >> 11) & 0x3));
+        s->brust_f1 = (value >> 7) & 0x3;
+        s->pack_f1 = (value >> 6) & 0x1;
+        s->data_type_f1 = (1 << ((value >> 0) & 0x3));
+        break;
+
+    case 0xbc2:	/* DMA_LCD_CCR */
+        s->mode_f2 = (value >> 14) & 0x3;
+        s->mode_f1 = (value >> 12) & 0x3;
+        s->end_prog = (value >> 11) & 0x1;
+        s->omap_3_1_compatible_disable = (value >> 10) & 0x1;
+        s->repeat = (value >> 9) & 0x1;
+        s->auto_init = (value >> 8) & 0x1;
+        s->running = (value >> 7) & 0x1;
+        s->priority = (value >> 6) & 0x1;
+        s->bs = (value >> 4) & 0x1;
+        break;
+
+    case 0xbc4:	/* DMA_LCD_CTRL */
+        s->dst = (value >> 8) & 0x1;
+        s->src = ((value >> 6) & 0x3) << 1;
+        s->condition = 0;
+        /* Assume no bus errors and thus no BUS_ERROR irq bits.  */
+        s->interrupts = (value >> 1) & 1;
+        s->dual = value & 1;
+        break;
+
+    case 0xbc8:	/* TOP_B1_L */
+        s->src_f1_top &= 0xffff0000;
+        s->src_f1_top |= 0x0000ffff & value;
+        break;
+
+    case 0xbca:	/* TOP_B1_U */
+        s->src_f1_top &= 0x0000ffff;
+        s->src_f1_top |= value << 16;
+        break;
+
+    case 0xbcc:	/* BOT_B1_L */
+        s->src_f1_bottom &= 0xffff0000;
+        s->src_f1_bottom |= 0x0000ffff & value;
+        break;
+
+    case 0xbce:	/* BOT_B1_U */
+        s->src_f1_bottom &= 0x0000ffff;
+        s->src_f1_bottom |= (uint32_t) value << 16;
+        break;
+
+    case 0xbd0:	/* TOP_B2_L */
+        s->src_f2_top &= 0xffff0000;
+        s->src_f2_top |= 0x0000ffff & value;
+        break;
+
+    case 0xbd2:	/* TOP_B2_U */
+        s->src_f2_top &= 0x0000ffff;
+        s->src_f2_top |= (uint32_t) value << 16;
+        break;
+
+    case 0xbd4:	/* BOT_B2_L */
+        s->src_f2_bottom &= 0xffff0000;
+        s->src_f2_bottom |= 0x0000ffff & value;
+        break;
+
+    case 0xbd6:	/* BOT_B2_U */
+        s->src_f2_bottom &= 0x0000ffff;
+        s->src_f2_bottom |= (uint32_t) value << 16;
+        break;
+
+    case 0xbd8:	/* DMA_LCD_SRC_EI_B1 */
+        s->element_index_f1 = value;
+        break;
+
+    case 0xbda:	/* DMA_LCD_SRC_FI_B1_L */
+        s->frame_index_f1 &= 0xffff0000;
+        s->frame_index_f1 |= 0x0000ffff & value;
+        break;
+
+    case 0xbf4:	/* DMA_LCD_SRC_FI_B1_U */
+        s->frame_index_f1 &= 0x0000ffff;
+        s->frame_index_f1 |= (uint32_t) value << 16;
+        break;
+
+    case 0xbdc:	/* DMA_LCD_SRC_EI_B2 */
+        s->element_index_f2 = value;
+        break;
+
+    case 0xbde:	/* DMA_LCD_SRC_FI_B2_L */
+        s->frame_index_f2 &= 0xffff0000;
+        s->frame_index_f2 |= 0x0000ffff & value;
+        break;
+
+    case 0xbf6:	/* DMA_LCD_SRC_FI_B2_U */
+        s->frame_index_f2 &= 0x0000ffff;
+        s->frame_index_f2 |= (uint32_t) value << 16;
+        break;
+
+    case 0xbe0:	/* DMA_LCD_SRC_EN_B1 */
+        s->elements_f1 = value;
+        break;
+
+    case 0xbe4:	/* DMA_LCD_SRC_FN_B1 */
+        s->frames_f1 = value;
+        break;
+
+    case 0xbe2:	/* DMA_LCD_SRC_EN_B2 */
+        s->elements_f2 = value;
+        break;
+
+    case 0xbe6:	/* DMA_LCD_SRC_FN_B2 */
+        s->frames_f2 = value;
+        break;
+
+    case 0xbea:	/* DMA_LCD_LCH_CTRL */
+        s->lch_type = value & 0xf;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_3_2_lcd_read(struct omap_dma_lcd_channel_s *s, int offset,
+                uint16_t *ret)
+{
+    switch (offset) {
+    case 0xbc0:	/* DMA_LCD_CSDP */
+        *ret = (s->brust_f2 << 14) |
+            (s->pack_f2 << 13) |
+            ((s->data_type_f2 >> 1) << 11) |
+            (s->brust_f1 << 7) |
+            (s->pack_f1 << 6) |
+            ((s->data_type_f1 >> 1) << 0);
+        break;
+
+    case 0xbc2:	/* DMA_LCD_CCR */
+        *ret = (s->mode_f2 << 14) |
+            (s->mode_f1 << 12) |
+            (s->end_prog << 11) |
+            (s->omap_3_1_compatible_disable << 10) |
+            (s->repeat << 9) |
+            (s->auto_init << 8) |
+            (s->running << 7) |
+            (s->priority << 6) |
+            (s->bs << 4);
+        break;
+
+    case 0xbc4:	/* DMA_LCD_CTRL */
+        qemu_irq_lower(s->irq);
+        *ret = (s->dst << 8) |
+            ((s->src & 0x6) << 5) |
+            (s->condition << 3) |
+            (s->interrupts << 1) |
+            s->dual;
+        break;
+
+    case 0xbc8:	/* TOP_B1_L */
+        *ret = s->src_f1_top & 0xffff;
+        break;
+
+    case 0xbca:	/* TOP_B1_U */
+        *ret = s->src_f1_top >> 16;
+        break;
+
+    case 0xbcc:	/* BOT_B1_L */
+        *ret = s->src_f1_bottom & 0xffff;
+        break;
+
+    case 0xbce:	/* BOT_B1_U */
+        *ret = s->src_f1_bottom >> 16;
+        break;
+
+    case 0xbd0:	/* TOP_B2_L */
+        *ret = s->src_f2_top & 0xffff;
+        break;
+
+    case 0xbd2:	/* TOP_B2_U */
+        *ret = s->src_f2_top >> 16;
+        break;
+
+    case 0xbd4:	/* BOT_B2_L */
+        *ret = s->src_f2_bottom & 0xffff;
+        break;
+
+    case 0xbd6:	/* BOT_B2_U */
+        *ret = s->src_f2_bottom >> 16;
+        break;
+
+    case 0xbd8:	/* DMA_LCD_SRC_EI_B1 */
+        *ret = s->element_index_f1;
+        break;
+
+    case 0xbda:	/* DMA_LCD_SRC_FI_B1_L */
+        *ret = s->frame_index_f1 & 0xffff;
+        break;
+
+    case 0xbf4:	/* DMA_LCD_SRC_FI_B1_U */
+        *ret = s->frame_index_f1 >> 16;
+        break;
+
+    case 0xbdc:	/* DMA_LCD_SRC_EI_B2 */
+        *ret = s->element_index_f2;
+        break;
+
+    case 0xbde:	/* DMA_LCD_SRC_FI_B2_L */
+        *ret = s->frame_index_f2 & 0xffff;
+        break;
+
+    case 0xbf6:	/* DMA_LCD_SRC_FI_B2_U */
+        *ret = s->frame_index_f2 >> 16;
+        break;
+
+    case 0xbe0:	/* DMA_LCD_SRC_EN_B1 */
+        *ret = s->elements_f1;
+        break;
+
+    case 0xbe4:	/* DMA_LCD_SRC_FN_B1 */
+        *ret = s->frames_f1;
+        break;
+
+    case 0xbe2:	/* DMA_LCD_SRC_EN_B2 */
+        *ret = s->elements_f2;
+        break;
+
+    case 0xbe6:	/* DMA_LCD_SRC_FN_B2 */
+        *ret = s->frames_f2;
+        break;
+
+    case 0xbea:	/* DMA_LCD_LCH_CTRL */
+        *ret = s->lch_type;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_3_1_lcd_write(struct omap_dma_lcd_channel_s *s, int offset,
+                uint16_t value)
+{
+    switch (offset) {
+    case 0x300:	/* SYS_DMA_LCD_CTRL */
+        s->src = (value & 0x40) ? imif : emiff;
+        s->condition = 0;
+        /* Assume no bus errors and thus no BUS_ERROR irq bits.  */
+        s->interrupts = (value >> 1) & 1;
+        s->dual = value & 1;
+        break;
+
+    case 0x302:	/* SYS_DMA_LCD_TOP_F1_L */
+        s->src_f1_top &= 0xffff0000;
+        s->src_f1_top |= 0x0000ffff & value;
+        break;
+
+    case 0x304:	/* SYS_DMA_LCD_TOP_F1_U */
+        s->src_f1_top &= 0x0000ffff;
+        s->src_f1_top |= value << 16;
+        break;
+
+    case 0x306:	/* SYS_DMA_LCD_BOT_F1_L */
+        s->src_f1_bottom &= 0xffff0000;
+        s->src_f1_bottom |= 0x0000ffff & value;
+        break;
+
+    case 0x308:	/* SYS_DMA_LCD_BOT_F1_U */
+        s->src_f1_bottom &= 0x0000ffff;
+        s->src_f1_bottom |= value << 16;
+        break;
+
+    case 0x30a:	/* SYS_DMA_LCD_TOP_F2_L */
+        s->src_f2_top &= 0xffff0000;
+        s->src_f2_top |= 0x0000ffff & value;
+        break;
+
+    case 0x30c:	/* SYS_DMA_LCD_TOP_F2_U */
+        s->src_f2_top &= 0x0000ffff;
+        s->src_f2_top |= value << 16;
+        break;
+
+    case 0x30e:	/* SYS_DMA_LCD_BOT_F2_L */
+        s->src_f2_bottom &= 0xffff0000;
+        s->src_f2_bottom |= 0x0000ffff & value;
+        break;
+
+    case 0x310:	/* SYS_DMA_LCD_BOT_F2_U */
+        s->src_f2_bottom &= 0x0000ffff;
+        s->src_f2_bottom |= value << 16;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_3_1_lcd_read(struct omap_dma_lcd_channel_s *s, int offset,
+                uint16_t *ret)
+{
+    int i;
+
+    switch (offset) {
+    case 0x300:	/* SYS_DMA_LCD_CTRL */
+        i = s->condition;
+        s->condition = 0;
+        qemu_irq_lower(s->irq);
+        *ret = ((s->src == imif) << 6) | (i << 3) |
+                (s->interrupts << 1) | s->dual;
+        break;
+
+    case 0x302:	/* SYS_DMA_LCD_TOP_F1_L */
+        *ret = s->src_f1_top & 0xffff;
+        break;
+
+    case 0x304:	/* SYS_DMA_LCD_TOP_F1_U */
+        *ret = s->src_f1_top >> 16;
+        break;
+
+    case 0x306:	/* SYS_DMA_LCD_BOT_F1_L */
+        *ret = s->src_f1_bottom & 0xffff;
+        break;
+
+    case 0x308:	/* SYS_DMA_LCD_BOT_F1_U */
+        *ret = s->src_f1_bottom >> 16;
+        break;
+
+    case 0x30a:	/* SYS_DMA_LCD_TOP_F2_L */
+        *ret = s->src_f2_top & 0xffff;
+        break;
+
+    case 0x30c:	/* SYS_DMA_LCD_TOP_F2_U */
+        *ret = s->src_f2_top >> 16;
+        break;
+
+    case 0x30e:	/* SYS_DMA_LCD_BOT_F2_L */
+        *ret = s->src_f2_bottom & 0xffff;
+        break;
+
+    case 0x310:	/* SYS_DMA_LCD_BOT_F2_U */
+        *ret = s->src_f2_bottom >> 16;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_sys_write(struct omap_dma_s *s, int offset, uint16_t value)
+{
+    switch (offset) {
+    case 0x400:	/* SYS_DMA_GCR */
+        s->gcr = value;
+        break;
+
+    case 0x404:	/* DMA_GSCR */
+        if (value & 0x8)
+            omap_dma_disable_3_1_mapping(s);
+        else
+            omap_dma_enable_3_1_mapping(s);
+        break;
+
+    case 0x408:	/* DMA_GRST */
+        if (value & 0x1)
+            omap_dma_reset(s->dma);
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static int omap_dma_sys_read(struct omap_dma_s *s, int offset,
+                uint16_t *ret)
+{
+    switch (offset) {
+    case 0x400:	/* SYS_DMA_GCR */
+        *ret = s->gcr;
+        break;
+
+    case 0x404:	/* DMA_GSCR */
+        *ret = s->omap_3_1_mapping_disabled << 3;
+        break;
+
+    case 0x408:	/* DMA_GRST */
+        *ret = 0;
+        break;
+
+    case 0x442:	/* DMA_HW_ID */
+    case 0x444:	/* DMA_PCh2_ID */
+    case 0x446:	/* DMA_PCh0_ID */
+    case 0x448:	/* DMA_PCh1_ID */
+    case 0x44a:	/* DMA_PChG_ID */
+    case 0x44c:	/* DMA_PChD_ID */
+        *ret = 1;
+        break;
+
+    case 0x44e:	/* DMA_CAPS_0_U */
+        *ret = (s->caps[0] >> 16) & 0xffff;
+        break;
+    case 0x450:	/* DMA_CAPS_0_L */
+        *ret = (s->caps[0] >>  0) & 0xffff;
+        break;
+
+    case 0x452:	/* DMA_CAPS_1_U */
+        *ret = (s->caps[1] >> 16) & 0xffff;
+        break;
+    case 0x454:	/* DMA_CAPS_1_L */
+        *ret = (s->caps[1] >>  0) & 0xffff;
+        break;
+
+    case 0x456:	/* DMA_CAPS_2 */
+        *ret = s->caps[2];
+        break;
+
+    case 0x458:	/* DMA_CAPS_3 */
+        *ret = s->caps[3];
+        break;
+
+    case 0x45a:	/* DMA_CAPS_4 */
+        *ret = s->caps[4];
+        break;
+
+    case 0x460:	/* DMA_PCh2_SR */
+    case 0x480:	/* DMA_PCh0_SR */
+    case 0x482:	/* DMA_PCh1_SR */
+    case 0x4c0:	/* DMA_PChD_SR_0 */
+        printf("%s: Physical Channel Status Registers not implemented.\n",
+               __FUNCTION__);
+        *ret = 0xff;
+        break;
+
+    default:
+        return 1;
+    }
+    return 0;
+}
+
+static uint64_t omap_dma_read(void *opaque, hwaddr addr,
+                              unsigned size)
+{
+    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
+    int reg, ch;
+    uint16_t ret;
+
+    if (size != 2) {
+        return omap_badwidth_read16(opaque, addr);
+    }
+
+    switch (addr) {
+    case 0x300 ... 0x3fe:
+        if (s->model <= omap_dma_3_1 || !s->omap_3_1_mapping_disabled) {
+            if (omap_dma_3_1_lcd_read(&s->lcd_ch, addr, &ret))
+                break;
+            return ret;
+        }
+        /* Fall through. */
+    case 0x000 ... 0x2fe:
+        reg = addr & 0x3f;
+        ch = (addr >> 6) & 0x0f;
+        if (omap_dma_ch_reg_read(s, &s->ch[ch], reg, &ret))
+            break;
+        return ret;
+
+    case 0x404 ... 0x4fe:
+        if (s->model <= omap_dma_3_1)
+            break;
+        /* Fall through. */
+    case 0x400:
+        if (omap_dma_sys_read(s, addr, &ret))
+            break;
+        return ret;
+
+    case 0xb00 ... 0xbfe:
+        if (s->model == omap_dma_3_2 && s->omap_3_1_mapping_disabled) {
+            if (omap_dma_3_2_lcd_read(&s->lcd_ch, addr, &ret))
+                break;
+            return ret;
+        }
+        break;
+    }
+
+    OMAP_BAD_REG(addr);
+    return 0;
+}
+
+static void omap_dma_write(void *opaque, hwaddr addr,
+                           uint64_t value, unsigned size)
+{
+    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
+    int reg, ch;
+
+    if (size != 2) {
+        return omap_badwidth_write16(opaque, addr, value);
+    }
+
+    switch (addr) {
+    case 0x300 ... 0x3fe:
+        if (s->model <= omap_dma_3_1 || !s->omap_3_1_mapping_disabled) {
+            if (omap_dma_3_1_lcd_write(&s->lcd_ch, addr, value))
+                break;
+            return;
+        }
+        /* Fall through.  */
+    case 0x000 ... 0x2fe:
+        reg = addr & 0x3f;
+        ch = (addr >> 6) & 0x0f;
+        if (omap_dma_ch_reg_write(s, &s->ch[ch], reg, value))
+            break;
+        return;
+
+    case 0x404 ... 0x4fe:
+        if (s->model <= omap_dma_3_1)
+            break;
+    case 0x400:
+        /* Fall through. */
+        if (omap_dma_sys_write(s, addr, value))
+            break;
+        return;
+
+    case 0xb00 ... 0xbfe:
+        if (s->model == omap_dma_3_2 && s->omap_3_1_mapping_disabled) {
+            if (omap_dma_3_2_lcd_write(&s->lcd_ch, addr, value))
+                break;
+            return;
+        }
+        break;
+    }
+
+    OMAP_BAD_REG(addr);
+}
+
+static const MemoryRegionOps omap_dma_ops = {
+    .read = omap_dma_read,
+    .write = omap_dma_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void omap_dma_request(void *opaque, int drq, int req)
+{
+    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
+    /* The request pins are level triggered in QEMU.  */
+    if (req) {
+        if (~s->dma->drqbmp & (1 << drq)) {
+            s->dma->drqbmp |= 1 << drq;
+            omap_dma_process_request(s, drq);
+        }
+    } else
+        s->dma->drqbmp &= ~(1 << drq);
+}
+
+/* XXX: this won't be needed once soc_dma knows about clocks.  */
+static void omap_dma_clk_update(void *opaque, int line, int on)
+{
+    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
+    int i;
+
+    s->dma->freq = omap_clk_getrate(s->clk);
+
+    for (i = 0; i < s->chans; i ++)
+        if (s->ch[i].active)
+            soc_dma_set_request(s->ch[i].dma, on);
+}
+
+static void omap_dma_setcaps(struct omap_dma_s *s)
+{
+    switch (s->model) {
+    default:
+    case omap_dma_3_1:
+        break;
+    case omap_dma_3_2:
+    case omap_dma_4:
+        /* XXX Only available for sDMA */
+        s->caps[0] =
+                (1 << 19) |	/* Constant Fill Capability */
+                (1 << 18);	/* Transparent BLT Capability */
+        s->caps[1] =
+                (1 << 1);	/* 1-bit palettized capability (DMA 3.2 only) */
+        s->caps[2] =
+                (1 << 8) |	/* SEPARATE_SRC_AND_DST_INDEX_CPBLTY */
+                (1 << 7) |	/* DST_DOUBLE_INDEX_ADRS_CPBLTY */
+                (1 << 6) |	/* DST_SINGLE_INDEX_ADRS_CPBLTY */
+                (1 << 5) |	/* DST_POST_INCRMNT_ADRS_CPBLTY */
+                (1 << 4) |	/* DST_CONST_ADRS_CPBLTY */
+                (1 << 3) |	/* SRC_DOUBLE_INDEX_ADRS_CPBLTY */
+                (1 << 2) |	/* SRC_SINGLE_INDEX_ADRS_CPBLTY */
+                (1 << 1) |	/* SRC_POST_INCRMNT_ADRS_CPBLTY */
+                (1 << 0);	/* SRC_CONST_ADRS_CPBLTY */
+        s->caps[3] =
+                (1 << 6) |	/* BLOCK_SYNCHR_CPBLTY (DMA 4 only) */
+                (1 << 7) |	/* PKT_SYNCHR_CPBLTY (DMA 4 only) */
+                (1 << 5) |	/* CHANNEL_CHAINING_CPBLTY */
+                (1 << 4) |	/* LCh_INTERLEAVE_CPBLTY */
+                (1 << 3) |	/* AUTOINIT_REPEAT_CPBLTY (DMA 3.2 only) */
+                (1 << 2) |	/* AUTOINIT_ENDPROG_CPBLTY (DMA 3.2 only) */
+                (1 << 1) |	/* FRAME_SYNCHR_CPBLTY */
+                (1 << 0);	/* ELMNT_SYNCHR_CPBLTY */
+        s->caps[4] =
+                (1 << 7) |	/* PKT_INTERRUPT_CPBLTY (DMA 4 only) */
+                (1 << 6) |	/* SYNC_STATUS_CPBLTY */
+                (1 << 5) |	/* BLOCK_INTERRUPT_CPBLTY */
+                (1 << 4) |	/* LAST_FRAME_INTERRUPT_CPBLTY */
+                (1 << 3) |	/* FRAME_INTERRUPT_CPBLTY */
+                (1 << 2) |	/* HALF_FRAME_INTERRUPT_CPBLTY */
+                (1 << 1) |	/* EVENT_DROP_INTERRUPT_CPBLTY */
+                (1 << 0);	/* TIMEOUT_INTERRUPT_CPBLTY (DMA 3.2 only) */
+        break;
+    }
+}
+
+struct soc_dma_s *omap_dma_init(hwaddr base, qemu_irq *irqs,
+                MemoryRegion *sysmem,
+                qemu_irq lcd_irq, struct omap_mpu_state_s *mpu, omap_clk clk,
+                enum omap_dma_model model)
+{
+    int num_irqs, memsize, i;
+    struct omap_dma_s *s = (struct omap_dma_s *)
+            g_malloc0(sizeof(struct omap_dma_s));
+
+    if (model <= omap_dma_3_1) {
+        num_irqs = 6;
+        memsize = 0x800;
+    } else {
+        num_irqs = 16;
+        memsize = 0xc00;
+    }
+    s->model = model;
+    s->mpu = mpu;
+    s->clk = clk;
+    s->lcd_ch.irq = lcd_irq;
+    s->lcd_ch.mpu = mpu;
+
+    s->dma = soc_dma_init((model <= omap_dma_3_1) ? 9 : 16);
+    s->dma->freq = omap_clk_getrate(clk);
+    s->dma->transfer_fn = omap_dma_transfer_generic;
+    s->dma->setup_fn = omap_dma_transfer_setup;
+    s->dma->drq = qemu_allocate_irqs(omap_dma_request, s, 32);
+    s->dma->opaque = s;
+
+    while (num_irqs --)
+        s->ch[num_irqs].irq = irqs[num_irqs];
+    for (i = 0; i < 3; i ++) {
+        s->ch[i].sibling = &s->ch[i + 6];
+        s->ch[i + 6].sibling = &s->ch[i];
+    }
+    for (i = (model <= omap_dma_3_1) ? 8 : 15; i >= 0; i --) {
+        s->ch[i].dma = &s->dma->ch[i];
+        s->dma->ch[i].opaque = &s->ch[i];
+    }
+
+    omap_dma_setcaps(s);
+    omap_clk_adduser(s->clk, qemu_allocate_irqs(omap_dma_clk_update, s, 1)[0]);
+    omap_dma_reset(s->dma);
+    omap_dma_clk_update(s, 0, 1);
+
+    memory_region_init_io(&s->iomem, &omap_dma_ops, s, "omap.dma", memsize);
+    memory_region_add_subregion(sysmem, base, &s->iomem);
+
+    mpu->drq = s->dma->drq;
+
+    return s->dma;
+}
+
+static void omap_dma_interrupts_4_update(struct omap_dma_s *s)
+{
+    struct omap_dma_channel_s *ch = s->ch;
+    uint32_t bmp, bit;
+
+    for (bmp = 0, bit = 1; bit; ch ++, bit <<= 1)
+        if (ch->status) {
+            bmp |= bit;
+            ch->cstatus |= ch->status;
+            ch->status = 0;
+        }
+    if ((s->irqstat[0] |= s->irqen[0] & bmp))
+        qemu_irq_raise(s->irq[0]);
+    if ((s->irqstat[1] |= s->irqen[1] & bmp))
+        qemu_irq_raise(s->irq[1]);
+    if ((s->irqstat[2] |= s->irqen[2] & bmp))
+        qemu_irq_raise(s->irq[2]);
+    if ((s->irqstat[3] |= s->irqen[3] & bmp))
+        qemu_irq_raise(s->irq[3]);
+}
+
+static uint64_t omap_dma4_read(void *opaque, hwaddr addr,
+                               unsigned size)
+{
+    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
+    int irqn = 0, chnum;
+    struct omap_dma_channel_s *ch;
+
+    if (size == 1) {
+        return omap_badwidth_read16(opaque, addr);
+    }
+
+    switch (addr) {
+    case 0x00:	/* DMA4_REVISION */
+        return 0x40;
+
+    case 0x14:	/* DMA4_IRQSTATUS_L3 */
+        irqn ++;
+        /* fall through */
+    case 0x10:	/* DMA4_IRQSTATUS_L2 */
+        irqn ++;
+        /* fall through */
+    case 0x0c:	/* DMA4_IRQSTATUS_L1 */
+        irqn ++;
+        /* fall through */
+    case 0x08:	/* DMA4_IRQSTATUS_L0 */
+        return s->irqstat[irqn];
+
+    case 0x24:	/* DMA4_IRQENABLE_L3 */
+        irqn ++;
+        /* fall through */
+    case 0x20:	/* DMA4_IRQENABLE_L2 */
+        irqn ++;
+        /* fall through */
+    case 0x1c:	/* DMA4_IRQENABLE_L1 */
+        irqn ++;
+        /* fall through */
+    case 0x18:	/* DMA4_IRQENABLE_L0 */
+        return s->irqen[irqn];
+
+    case 0x28:	/* DMA4_SYSSTATUS */
+        return 1;						/* RESETDONE */
+
+    case 0x2c:	/* DMA4_OCP_SYSCONFIG */
+        return s->ocp;
+
+    case 0x64:	/* DMA4_CAPS_0 */
+        return s->caps[0];
+    case 0x6c:	/* DMA4_CAPS_2 */
+        return s->caps[2];
+    case 0x70:	/* DMA4_CAPS_3 */
+        return s->caps[3];
+    case 0x74:	/* DMA4_CAPS_4 */
+        return s->caps[4];
+
+    case 0x78:	/* DMA4_GCR */
+        return s->gcr;
+
+    case 0x80 ... 0xfff:
+        addr -= 0x80;
+        chnum = addr / 0x60;
+        ch = s->ch + chnum;
+        addr -= chnum * 0x60;
+        break;
+
+    default:
+        OMAP_BAD_REG(addr);
+        return 0;
+    }
+
+    /* Per-channel registers */
+    switch (addr) {
+    case 0x00:	/* DMA4_CCR */
+        return (ch->buf_disable << 25) |
+                (ch->src_sync << 24) |
+                (ch->prefetch << 23) |
+                ((ch->sync & 0x60) << 14) |
+                (ch->bs << 18) |
+                (ch->transparent_copy << 17) |
+                (ch->constant_fill << 16) |
+                (ch->mode[1] << 14) |
+                (ch->mode[0] << 12) |
+                (0 << 10) | (0 << 9) |
+                (ch->suspend << 8) |
+                (ch->enable << 7) |
+                (ch->priority << 6) |
+                (ch->fs << 5) | (ch->sync & 0x1f);
+
+    case 0x04:	/* DMA4_CLNK_CTRL */
+        return (ch->link_enabled << 15) | ch->link_next_ch;
+
+    case 0x08:	/* DMA4_CICR */
+        return ch->interrupts;
+
+    case 0x0c:	/* DMA4_CSR */
+        return ch->cstatus;
+
+    case 0x10:	/* DMA4_CSDP */
+        return (ch->endian[0] << 21) |
+                (ch->endian_lock[0] << 20) |
+                (ch->endian[1] << 19) |
+                (ch->endian_lock[1] << 18) |
+                (ch->write_mode << 16) |
+                (ch->burst[1] << 14) |
+                (ch->pack[1] << 13) |
+                (ch->translate[1] << 9) |
+                (ch->burst[0] << 7) |
+                (ch->pack[0] << 6) |
+                (ch->translate[0] << 2) |
+                (ch->data_type >> 1);
+
+    case 0x14:	/* DMA4_CEN */
+        return ch->elements;
+
+    case 0x18:	/* DMA4_CFN */
+        return ch->frames;
+
+    case 0x1c:	/* DMA4_CSSA */
+        return ch->addr[0];
+
+    case 0x20:	/* DMA4_CDSA */
+        return ch->addr[1];
+
+    case 0x24:	/* DMA4_CSEI */
+        return ch->element_index[0];
+
+    case 0x28:	/* DMA4_CSFI */
+        return ch->frame_index[0];
+
+    case 0x2c:	/* DMA4_CDEI */
+        return ch->element_index[1];
+
+    case 0x30:	/* DMA4_CDFI */
+        return ch->frame_index[1];
+
+    case 0x34:	/* DMA4_CSAC */
+        return ch->active_set.src & 0xffff;
+
+    case 0x38:	/* DMA4_CDAC */
+        return ch->active_set.dest & 0xffff;
+
+    case 0x3c:	/* DMA4_CCEN */
+        return ch->active_set.element;
+
+    case 0x40:	/* DMA4_CCFN */
+        return ch->active_set.frame;
+
+    case 0x44:	/* DMA4_COLOR */
+        /* XXX only in sDMA */
+        return ch->color;
+
+    default:
+        OMAP_BAD_REG(addr);
+        return 0;
+    }
+}
+
+static void omap_dma4_write(void *opaque, hwaddr addr,
+                            uint64_t value, unsigned size)
+{
+    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
+    int chnum, irqn = 0;
+    struct omap_dma_channel_s *ch;
+
+    if (size == 1) {
+        return omap_badwidth_write16(opaque, addr, value);
+    }
+
+    switch (addr) {
+    case 0x14:	/* DMA4_IRQSTATUS_L3 */
+        irqn ++;
+        /* fall through */
+    case 0x10:	/* DMA4_IRQSTATUS_L2 */
+        irqn ++;
+        /* fall through */
+    case 0x0c:	/* DMA4_IRQSTATUS_L1 */
+        irqn ++;
+        /* fall through */
+    case 0x08:	/* DMA4_IRQSTATUS_L0 */
+        s->irqstat[irqn] &= ~value;
+        if (!s->irqstat[irqn])
+            qemu_irq_lower(s->irq[irqn]);
+        return;
+
+    case 0x24:	/* DMA4_IRQENABLE_L3 */
+        irqn ++;
+        /* fall through */
+    case 0x20:	/* DMA4_IRQENABLE_L2 */
+        irqn ++;
+        /* fall through */
+    case 0x1c:	/* DMA4_IRQENABLE_L1 */
+        irqn ++;
+        /* fall through */
+    case 0x18:	/* DMA4_IRQENABLE_L0 */
+        s->irqen[irqn] = value;
+        return;
+
+    case 0x2c:	/* DMA4_OCP_SYSCONFIG */
+        if (value & 2)						/* SOFTRESET */
+            omap_dma_reset(s->dma);
+        s->ocp = value & 0x3321;
+        if (((s->ocp >> 12) & 3) == 3)				/* MIDLEMODE */
+            fprintf(stderr, "%s: invalid DMA power mode\n", __FUNCTION__);
+        return;
+
+    case 0x78:	/* DMA4_GCR */
+        s->gcr = value & 0x00ff00ff;
+	if ((value & 0xff) == 0x00)		/* MAX_CHANNEL_FIFO_DEPTH */
+            fprintf(stderr, "%s: wrong FIFO depth in GCR\n", __FUNCTION__);
+        return;
+
+    case 0x80 ... 0xfff:
+        addr -= 0x80;
+        chnum = addr / 0x60;
+        ch = s->ch + chnum;
+        addr -= chnum * 0x60;
+        break;
+
+    case 0x00:	/* DMA4_REVISION */
+    case 0x28:	/* DMA4_SYSSTATUS */
+    case 0x64:	/* DMA4_CAPS_0 */
+    case 0x6c:	/* DMA4_CAPS_2 */
+    case 0x70:	/* DMA4_CAPS_3 */
+    case 0x74:	/* DMA4_CAPS_4 */
+        OMAP_RO_REG(addr);
+        return;
+
+    default:
+        OMAP_BAD_REG(addr);
+        return;
+    }
+
+    /* Per-channel registers */
+    switch (addr) {
+    case 0x00:	/* DMA4_CCR */
+        ch->buf_disable = (value >> 25) & 1;
+        ch->src_sync = (value >> 24) & 1;	/* XXX For CamDMA must be 1 */
+        if (ch->buf_disable && !ch->src_sync)
+            fprintf(stderr, "%s: Buffering disable is not allowed in "
+                            "destination synchronised mode\n", __FUNCTION__);
+        ch->prefetch = (value >> 23) & 1;
+        ch->bs = (value >> 18) & 1;
+        ch->transparent_copy = (value >> 17) & 1;
+        ch->constant_fill = (value >> 16) & 1;
+        ch->mode[1] = (omap_dma_addressing_t) ((value & 0xc000) >> 14);
+        ch->mode[0] = (omap_dma_addressing_t) ((value & 0x3000) >> 12);
+        ch->suspend = (value & 0x0100) >> 8;
+        ch->priority = (value & 0x0040) >> 6;
+        ch->fs = (value & 0x0020) >> 5;
+        if (ch->fs && ch->bs && ch->mode[0] && ch->mode[1])
+            fprintf(stderr, "%s: For a packet transfer at least one port "
+                            "must be constant-addressed\n", __FUNCTION__);
+        ch->sync = (value & 0x001f) | ((value >> 14) & 0x0060);
+        /* XXX must be 0x01 for CamDMA */
+
+        if (value & 0x0080)
+            omap_dma_enable_channel(s, ch);
+        else
+            omap_dma_disable_channel(s, ch);
+
+        break;
+
+    case 0x04:	/* DMA4_CLNK_CTRL */
+        ch->link_enabled = (value >> 15) & 0x1;
+        ch->link_next_ch = value & 0x1f;
+        break;
+
+    case 0x08:	/* DMA4_CICR */
+        ch->interrupts = value & 0x09be;
+        break;
+
+    case 0x0c:	/* DMA4_CSR */
+        ch->cstatus &= ~value;
+        break;
+
+    case 0x10:	/* DMA4_CSDP */
+        ch->endian[0] =(value >> 21) & 1;
+        ch->endian_lock[0] =(value >> 20) & 1;
+        ch->endian[1] =(value >> 19) & 1;
+        ch->endian_lock[1] =(value >> 18) & 1;
+        if (ch->endian[0] != ch->endian[1])
+            fprintf(stderr, "%s: DMA endiannes conversion enable attempt\n",
+                            __FUNCTION__);
+        ch->write_mode = (value >> 16) & 3;
+        ch->burst[1] = (value & 0xc000) >> 14;
+        ch->pack[1] = (value & 0x2000) >> 13;
+        ch->translate[1] = (value & 0x1e00) >> 9;
+        ch->burst[0] = (value & 0x0180) >> 7;
+        ch->pack[0] = (value & 0x0040) >> 6;
+        ch->translate[0] = (value & 0x003c) >> 2;
+        if (ch->translate[0] | ch->translate[1])
+            fprintf(stderr, "%s: bad MReqAddressTranslate sideband signal\n",
+                            __FUNCTION__);
+        ch->data_type = 1 << (value & 3);
+        if ((value & 3) == 3)
+            printf("%s: bad data_type for DMA channel\n", __FUNCTION__);
+        break;
+
+    case 0x14:	/* DMA4_CEN */
+        ch->set_update = 1;
+        ch->elements = value & 0xffffff;
+        break;
+
+    case 0x18:	/* DMA4_CFN */
+        ch->frames = value & 0xffff;
+        ch->set_update = 1;
+        break;
+
+    case 0x1c:	/* DMA4_CSSA */
+        ch->addr[0] = (hwaddr) (uint32_t) value;
+        ch->set_update = 1;
+        break;
+
+    case 0x20:	/* DMA4_CDSA */
+        ch->addr[1] = (hwaddr) (uint32_t) value;
+        ch->set_update = 1;
+        break;
+
+    case 0x24:	/* DMA4_CSEI */
+        ch->element_index[0] = (int16_t) value;
+        ch->set_update = 1;
+        break;
+
+    case 0x28:	/* DMA4_CSFI */
+        ch->frame_index[0] = (int32_t) value;
+        ch->set_update = 1;
+        break;
+
+    case 0x2c:	/* DMA4_CDEI */
+        ch->element_index[1] = (int16_t) value;
+        ch->set_update = 1;
+        break;
+
+    case 0x30:	/* DMA4_CDFI */
+        ch->frame_index[1] = (int32_t) value;
+        ch->set_update = 1;
+        break;
+
+    case 0x44:	/* DMA4_COLOR */
+        /* XXX only in sDMA */
+        ch->color = value;
+        break;
+
+    case 0x34:	/* DMA4_CSAC */
+    case 0x38:	/* DMA4_CDAC */
+    case 0x3c:	/* DMA4_CCEN */
+    case 0x40:	/* DMA4_CCFN */
+        OMAP_RO_REG(addr);
+        break;
+
+    default:
+        OMAP_BAD_REG(addr);
+    }
+}
+
+static const MemoryRegionOps omap_dma4_ops = {
+    .read = omap_dma4_read,
+    .write = omap_dma4_write,
+    .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+struct soc_dma_s *omap_dma4_init(hwaddr base, qemu_irq *irqs,
+                MemoryRegion *sysmem,
+                struct omap_mpu_state_s *mpu, int fifo,
+                int chans, omap_clk iclk, omap_clk fclk)
+{
+    int i;
+    struct omap_dma_s *s = (struct omap_dma_s *)
+            g_malloc0(sizeof(struct omap_dma_s));
+
+    s->model = omap_dma_4;
+    s->chans = chans;
+    s->mpu = mpu;
+    s->clk = fclk;
+
+    s->dma = soc_dma_init(s->chans);
+    s->dma->freq = omap_clk_getrate(fclk);
+    s->dma->transfer_fn = omap_dma_transfer_generic;
+    s->dma->setup_fn = omap_dma_transfer_setup;
+    s->dma->drq = qemu_allocate_irqs(omap_dma_request, s, 64);
+    s->dma->opaque = s;
+    for (i = 0; i < s->chans; i ++) {
+        s->ch[i].dma = &s->dma->ch[i];
+        s->dma->ch[i].opaque = &s->ch[i];
+    }
+
+    memcpy(&s->irq, irqs, sizeof(s->irq));
+    s->intr_update = omap_dma_interrupts_4_update;
+
+    omap_dma_setcaps(s);
+    omap_clk_adduser(s->clk, qemu_allocate_irqs(omap_dma_clk_update, s, 1)[0]);
+    omap_dma_reset(s->dma);
+    omap_dma_clk_update(s, 0, !!s->dma->freq);
+
+    memory_region_init_io(&s->iomem, &omap_dma4_ops, s, "omap.dma4", 0x1000);
+    memory_region_add_subregion(sysmem, base, &s->iomem);
+
+    mpu->drq = s->dma->drq;
+
+    return s->dma;
+}
+
+struct omap_dma_lcd_channel_s *omap_dma_get_lcdch(struct soc_dma_s *dma)
+{
+    struct omap_dma_s *s = dma->opaque;
+
+    return &s->lcd_ch;
+}