qemu/hw/dma/omap_dma.c
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   1/*
   2 * TI OMAP DMA gigacell.
   3 *
   4 * Copyright (C) 2006-2008 Andrzej Zaborowski  <balrog@zabor.org>
   5 * Copyright (C) 2007-2008 Lauro Ramos Venancio  <lauro.venancio@indt.org.br>
   6 *
   7 * This program is free software; you can redistribute it and/or
   8 * modify it under the terms of the GNU General Public License as
   9 * published by the Free Software Foundation; either version 2 of
  10 * the License, or (at your option) any later version.
  11 *
  12 * This program is distributed in the hope that it will be useful,
  13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 * GNU General Public License for more details.
  16 *
  17 * You should have received a copy of the GNU General Public License along
  18 * with this program; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20#include "qemu/osdep.h"
  21#include "qemu/log.h"
  22#include "qemu/timer.h"
  23#include "hw/arm/omap.h"
  24#include "hw/irq.h"
  25#include "hw/arm/soc_dma.h"
  26
  27struct omap_dma_channel_s {
  28    /* transfer data */
  29    int burst[2];
  30    int pack[2];
  31    int endian[2];
  32    int endian_lock[2];
  33    int translate[2];
  34    enum omap_dma_port port[2];
  35    hwaddr addr[2];
  36    omap_dma_addressing_t mode[2];
  37    uint32_t elements;
  38    uint16_t frames;
  39    int32_t frame_index[2];
  40    int16_t element_index[2];
  41    int data_type;
  42
  43    /* transfer type */
  44    int transparent_copy;
  45    int constant_fill;
  46    uint32_t color;
  47    int prefetch;
  48
  49    /* auto init and linked channel data */
  50    int end_prog;
  51    int repeat;
  52    int auto_init;
  53    int link_enabled;
  54    int link_next_ch;
  55
  56    /* interruption data */
  57    int interrupts;
  58    int status;
  59    int cstatus;
  60
  61    /* state data */
  62    int active;
  63    int enable;
  64    int sync;
  65    int src_sync;
  66    int pending_request;
  67    int waiting_end_prog;
  68    uint16_t cpc;
  69    int set_update;
  70
  71    /* sync type */
  72    int fs;
  73    int bs;
  74
  75    /* compatibility */
  76    int omap_3_1_compatible_disable;
  77
  78    qemu_irq irq;
  79    struct omap_dma_channel_s *sibling;
  80
  81    struct omap_dma_reg_set_s {
  82        hwaddr src, dest;
  83        int frame;
  84        int element;
  85        int pck_element;
  86        int frame_delta[2];
  87        int elem_delta[2];
  88        int frames;
  89        int elements;
  90        int pck_elements;
  91    } active_set;
  92
  93    struct soc_dma_ch_s *dma;
  94
  95    /* unused parameters */
  96    int write_mode;
  97    int priority;
  98    int interleave_disabled;
  99    int type;
 100    int suspend;
 101    int buf_disable;
 102};
 103
 104struct omap_dma_s {
 105    struct soc_dma_s *dma;
 106    MemoryRegion iomem;
 107
 108    struct omap_mpu_state_s *mpu;
 109    omap_clk clk;
 110    qemu_irq irq[4];
 111    void (*intr_update)(struct omap_dma_s *s);
 112    enum omap_dma_model model;
 113    int omap_3_1_mapping_disabled;
 114
 115    uint32_t gcr;
 116    uint32_t ocp;
 117    uint32_t caps[5];
 118    uint32_t irqen[4];
 119    uint32_t irqstat[4];
 120
 121    int chans;
 122    struct omap_dma_channel_s ch[32];
 123    struct omap_dma_lcd_channel_s lcd_ch;
 124};
 125
 126/* Interrupts */
 127#define TIMEOUT_INTR    (1 << 0)
 128#define EVENT_DROP_INTR (1 << 1)
 129#define HALF_FRAME_INTR (1 << 2)
 130#define END_FRAME_INTR  (1 << 3)
 131#define LAST_FRAME_INTR (1 << 4)
 132#define END_BLOCK_INTR  (1 << 5)
 133#define SYNC            (1 << 6)
 134#define END_PKT_INTR    (1 << 7)
 135#define TRANS_ERR_INTR  (1 << 8)
 136#define MISALIGN_INTR   (1 << 11)
 137
 138static inline void omap_dma_interrupts_update(struct omap_dma_s *s)
 139{
 140    s->intr_update(s);
 141}
 142
 143static void omap_dma_channel_load(struct omap_dma_channel_s *ch)
 144{
 145    struct omap_dma_reg_set_s *a = &ch->active_set;
 146    int i, normal;
 147    int omap_3_1 = !ch->omap_3_1_compatible_disable;
 148
 149    /*
 150     * TODO: verify address ranges and alignment
 151     * TODO: port endianness
 152     */
 153
 154    a->src = ch->addr[0];
 155    a->dest = ch->addr[1];
 156    a->frames = ch->frames;
 157    a->elements = ch->elements;
 158    a->pck_elements = ch->frame_index[!ch->src_sync];
 159    a->frame = 0;
 160    a->element = 0;
 161    a->pck_element = 0;
 162
 163    if (unlikely(!ch->elements || !ch->frames)) {
 164        printf("%s: bad DMA request\n", __func__);
 165        return;
 166    }
 167
 168    for (i = 0; i < 2; i ++)
 169        switch (ch->mode[i]) {
 170        case constant:
 171            a->elem_delta[i] = 0;
 172            a->frame_delta[i] = 0;
 173            break;
 174        case post_incremented:
 175            a->elem_delta[i] = ch->data_type;
 176            a->frame_delta[i] = 0;
 177            break;
 178        case single_index:
 179            a->elem_delta[i] = ch->data_type +
 180                    ch->element_index[omap_3_1 ? 0 : i] - 1;
 181            a->frame_delta[i] = 0;
 182            break;
 183        case double_index:
 184            a->elem_delta[i] = ch->data_type +
 185                    ch->element_index[omap_3_1 ? 0 : i] - 1;
 186            a->frame_delta[i] = ch->frame_index[omap_3_1 ? 0 : i] -
 187                    ch->element_index[omap_3_1 ? 0 : i];
 188            break;
 189        default:
 190            break;
 191        }
 192
 193    normal = !ch->transparent_copy && !ch->constant_fill &&
 194            /* FIFO is big-endian so either (ch->endian[n] == 1) OR
 195             * (ch->endian_lock[n] == 1) mean no endianism conversion.  */
 196            (ch->endian[0] | ch->endian_lock[0]) ==
 197            (ch->endian[1] | ch->endian_lock[1]);
 198    for (i = 0; i < 2; i ++) {
 199        /* TODO: for a->frame_delta[i] > 0 still use the fast path, just
 200         * limit min_elems in omap_dma_transfer_setup to the nearest frame
 201         * end.  */
 202        if (!a->elem_delta[i] && normal &&
 203                        (a->frames == 1 || !a->frame_delta[i]))
 204            ch->dma->type[i] = soc_dma_access_const;
 205        else if (a->elem_delta[i] == ch->data_type && normal &&
 206                        (a->frames == 1 || !a->frame_delta[i]))
 207            ch->dma->type[i] = soc_dma_access_linear;
 208        else
 209            ch->dma->type[i] = soc_dma_access_other;
 210
 211        ch->dma->vaddr[i] = ch->addr[i];
 212    }
 213    soc_dma_ch_update(ch->dma);
 214}
 215
 216static void omap_dma_activate_channel(struct omap_dma_s *s,
 217                struct omap_dma_channel_s *ch)
 218{
 219    if (!ch->active) {
 220        if (ch->set_update) {
 221            /* It's not clear when the active set is supposed to be
 222             * loaded from registers.  We're already loading it when the
 223             * channel is enabled, and for some guests this is not enough
 224             * but that may be also because of a race condition (no
 225             * delays in qemu) in the guest code, which we're just
 226             * working around here.  */
 227            omap_dma_channel_load(ch);
 228            ch->set_update = 0;
 229        }
 230
 231        ch->active = 1;
 232        soc_dma_set_request(ch->dma, 1);
 233        if (ch->sync)
 234            ch->status |= SYNC;
 235    }
 236}
 237
 238static void omap_dma_deactivate_channel(struct omap_dma_s *s,
 239                struct omap_dma_channel_s *ch)
 240{
 241    /* Update cpc */
 242    ch->cpc = ch->active_set.dest & 0xffff;
 243
 244    if (ch->pending_request && !ch->waiting_end_prog && ch->enable) {
 245        /* Don't deactivate the channel */
 246        ch->pending_request = 0;
 247        return;
 248    }
 249
 250    /* Don't deactive the channel if it is synchronized and the DMA request is
 251       active */
 252    if (ch->sync && ch->enable && (s->dma->drqbmp & (1ULL << ch->sync)))
 253        return;
 254
 255    if (ch->active) {
 256        ch->active = 0;
 257        ch->status &= ~SYNC;
 258        soc_dma_set_request(ch->dma, 0);
 259    }
 260}
 261
 262static void omap_dma_enable_channel(struct omap_dma_s *s,
 263                struct omap_dma_channel_s *ch)
 264{
 265    if (!ch->enable) {
 266        ch->enable = 1;
 267        ch->waiting_end_prog = 0;
 268        omap_dma_channel_load(ch);
 269        /* TODO: theoretically if ch->sync && ch->prefetch &&
 270         * !s->dma->drqbmp[ch->sync], we should also activate and fetch
 271         * from source and then stall until signalled.  */
 272        if ((!ch->sync) || (s->dma->drqbmp & (1ULL << ch->sync))) {
 273            omap_dma_activate_channel(s, ch);
 274        }
 275    }
 276}
 277
 278static void omap_dma_disable_channel(struct omap_dma_s *s,
 279                struct omap_dma_channel_s *ch)
 280{
 281    if (ch->enable) {
 282        ch->enable = 0;
 283        /* Discard any pending request */
 284        ch->pending_request = 0;
 285        omap_dma_deactivate_channel(s, ch);
 286    }
 287}
 288
 289static void omap_dma_channel_end_prog(struct omap_dma_s *s,
 290                struct omap_dma_channel_s *ch)
 291{
 292    if (ch->waiting_end_prog) {
 293        ch->waiting_end_prog = 0;
 294        if (!ch->sync || ch->pending_request) {
 295            ch->pending_request = 0;
 296            omap_dma_activate_channel(s, ch);
 297        }
 298    }
 299}
 300
 301static void omap_dma_interrupts_3_1_update(struct omap_dma_s *s)
 302{
 303    struct omap_dma_channel_s *ch = s->ch;
 304
 305    /* First three interrupts are shared between two channels each. */
 306    if (ch[0].status | ch[6].status)
 307        qemu_irq_raise(ch[0].irq);
 308    if (ch[1].status | ch[7].status)
 309        qemu_irq_raise(ch[1].irq);
 310    if (ch[2].status | ch[8].status)
 311        qemu_irq_raise(ch[2].irq);
 312    if (ch[3].status)
 313        qemu_irq_raise(ch[3].irq);
 314    if (ch[4].status)
 315        qemu_irq_raise(ch[4].irq);
 316    if (ch[5].status)
 317        qemu_irq_raise(ch[5].irq);
 318}
 319
 320static void omap_dma_interrupts_3_2_update(struct omap_dma_s *s)
 321{
 322    struct omap_dma_channel_s *ch = s->ch;
 323    int i;
 324
 325    for (i = s->chans; i; ch ++, i --)
 326        if (ch->status)
 327            qemu_irq_raise(ch->irq);
 328}
 329
 330static void omap_dma_enable_3_1_mapping(struct omap_dma_s *s)
 331{
 332    s->omap_3_1_mapping_disabled = 0;
 333    s->chans = 9;
 334    s->intr_update = omap_dma_interrupts_3_1_update;
 335}
 336
 337static void omap_dma_disable_3_1_mapping(struct omap_dma_s *s)
 338{
 339    s->omap_3_1_mapping_disabled = 1;
 340    s->chans = 16;
 341    s->intr_update = omap_dma_interrupts_3_2_update;
 342}
 343
 344static void omap_dma_process_request(struct omap_dma_s *s, int request)
 345{
 346    int channel;
 347    int drop_event = 0;
 348    struct omap_dma_channel_s *ch = s->ch;
 349
 350    for (channel = 0; channel < s->chans; channel ++, ch ++) {
 351        if (ch->enable && ch->sync == request) {
 352            if (!ch->active)
 353                omap_dma_activate_channel(s, ch);
 354            else if (!ch->pending_request)
 355                ch->pending_request = 1;
 356            else {
 357                /* Request collision */
 358                /* Second request received while processing other request */
 359                ch->status |= EVENT_DROP_INTR;
 360                drop_event = 1;
 361            }
 362        }
 363    }
 364
 365    if (drop_event)
 366        omap_dma_interrupts_update(s);
 367}
 368
 369static void omap_dma_transfer_generic(struct soc_dma_ch_s *dma)
 370{
 371    uint8_t value[4];
 372    struct omap_dma_channel_s *ch = dma->opaque;
 373    struct omap_dma_reg_set_s *a = &ch->active_set;
 374    int bytes = dma->bytes;
 375#ifdef MULTI_REQ
 376    uint16_t status = ch->status;
 377#endif
 378
 379    do {
 380        /* Transfer a single element */
 381        /* FIXME: check the endianness */
 382        if (!ch->constant_fill)
 383            cpu_physical_memory_read(a->src, value, ch->data_type);
 384        else
 385            *(uint32_t *) value = ch->color;
 386
 387        if (!ch->transparent_copy || *(uint32_t *) value != ch->color)
 388            cpu_physical_memory_write(a->dest, value, ch->data_type);
 389
 390        a->src += a->elem_delta[0];
 391        a->dest += a->elem_delta[1];
 392        a->element ++;
 393
 394#ifndef MULTI_REQ
 395        if (a->element == a->elements) {
 396            /* End of Frame */
 397            a->element = 0;
 398            a->src += a->frame_delta[0];
 399            a->dest += a->frame_delta[1];
 400            a->frame ++;
 401
 402            /* If the channel is async, update cpc */
 403            if (!ch->sync)
 404                ch->cpc = a->dest & 0xffff;
 405        }
 406    } while ((bytes -= ch->data_type));
 407#else
 408        /* If the channel is element synchronized, deactivate it */
 409        if (ch->sync && !ch->fs && !ch->bs)
 410            omap_dma_deactivate_channel(s, ch);
 411
 412        /* If it is the last frame, set the LAST_FRAME interrupt */
 413        if (a->element == 1 && a->frame == a->frames - 1)
 414            if (ch->interrupts & LAST_FRAME_INTR)
 415                ch->status |= LAST_FRAME_INTR;
 416
 417        /* If the half of the frame was reached, set the HALF_FRAME
 418           interrupt */
 419        if (a->element == (a->elements >> 1))
 420            if (ch->interrupts & HALF_FRAME_INTR)
 421                ch->status |= HALF_FRAME_INTR;
 422
 423        if (ch->fs && ch->bs) {
 424            a->pck_element ++;
 425            /* Check if a full packet has beed transferred.  */
 426            if (a->pck_element == a->pck_elements) {
 427                a->pck_element = 0;
 428
 429                /* Set the END_PKT interrupt */
 430                if ((ch->interrupts & END_PKT_INTR) && !ch->src_sync)
 431                    ch->status |= END_PKT_INTR;
 432
 433                /* If the channel is packet-synchronized, deactivate it */
 434                if (ch->sync)
 435                    omap_dma_deactivate_channel(s, ch);
 436            }
 437        }
 438
 439        if (a->element == a->elements) {
 440            /* End of Frame */
 441            a->element = 0;
 442            a->src += a->frame_delta[0];
 443            a->dest += a->frame_delta[1];
 444            a->frame ++;
 445
 446            /* If the channel is frame synchronized, deactivate it */
 447            if (ch->sync && ch->fs && !ch->bs)
 448                omap_dma_deactivate_channel(s, ch);
 449
 450            /* If the channel is async, update cpc */
 451            if (!ch->sync)
 452                ch->cpc = a->dest & 0xffff;
 453
 454            /* Set the END_FRAME interrupt */
 455            if (ch->interrupts & END_FRAME_INTR)
 456                ch->status |= END_FRAME_INTR;
 457
 458            if (a->frame == a->frames) {
 459                /* End of Block */
 460                /* Disable the channel */
 461
 462                if (ch->omap_3_1_compatible_disable) {
 463                    omap_dma_disable_channel(s, ch);
 464                    if (ch->link_enabled)
 465                        omap_dma_enable_channel(s,
 466                                        &s->ch[ch->link_next_ch]);
 467                } else {
 468                    if (!ch->auto_init)
 469                        omap_dma_disable_channel(s, ch);
 470                    else if (ch->repeat || ch->end_prog)
 471                        omap_dma_channel_load(ch);
 472                    else {
 473                        ch->waiting_end_prog = 1;
 474                        omap_dma_deactivate_channel(s, ch);
 475                    }
 476                }
 477
 478                if (ch->interrupts & END_BLOCK_INTR)
 479                    ch->status |= END_BLOCK_INTR;
 480            }
 481        }
 482    } while (status == ch->status && ch->active);
 483
 484    omap_dma_interrupts_update(s);
 485#endif
 486}
 487
 488enum {
 489    omap_dma_intr_element_sync,
 490    omap_dma_intr_last_frame,
 491    omap_dma_intr_half_frame,
 492    omap_dma_intr_frame,
 493    omap_dma_intr_frame_sync,
 494    omap_dma_intr_packet,
 495    omap_dma_intr_packet_sync,
 496    omap_dma_intr_block,
 497    __omap_dma_intr_last,
 498};
 499
 500static void omap_dma_transfer_setup(struct soc_dma_ch_s *dma)
 501{
 502    struct omap_dma_port_if_s *src_p, *dest_p;
 503    struct omap_dma_reg_set_s *a;
 504    struct omap_dma_channel_s *ch = dma->opaque;
 505    struct omap_dma_s *s = dma->dma->opaque;
 506    int frames, min_elems, elements[__omap_dma_intr_last];
 507
 508    a = &ch->active_set;
 509
 510    src_p = &s->mpu->port[ch->port[0]];
 511    dest_p = &s->mpu->port[ch->port[1]];
 512    if ((!ch->constant_fill && !src_p->addr_valid(s->mpu, a->src)) ||
 513                    (!dest_p->addr_valid(s->mpu, a->dest))) {
 514#if 0
 515        /* Bus time-out */
 516        if (ch->interrupts & TIMEOUT_INTR)
 517            ch->status |= TIMEOUT_INTR;
 518        omap_dma_deactivate_channel(s, ch);
 519        continue;
 520#endif
 521        printf("%s: Bus time-out in DMA%i operation\n",
 522                        __func__, dma->num);
 523    }
 524
 525    min_elems = INT_MAX;
 526
 527    /* Check all the conditions that terminate the transfer starting
 528     * with those that can occur the soonest.  */
 529#define INTR_CHECK(cond, id, nelements) \
 530    if (cond) {                 \
 531        elements[id] = nelements;       \
 532        if (elements[id] < min_elems)   \
 533            min_elems = elements[id];   \
 534    } else                              \
 535        elements[id] = INT_MAX;
 536
 537    /* Elements */
 538    INTR_CHECK(
 539                    ch->sync && !ch->fs && !ch->bs,
 540                    omap_dma_intr_element_sync,
 541                    1)
 542
 543    /* Frames */
 544    /* TODO: for transfers where entire frames can be read and written
 545     * using memcpy() but a->frame_delta is non-zero, try to still do
 546     * transfers using soc_dma but limit min_elems to a->elements - ...
 547     * See also the TODO in omap_dma_channel_load.  */
 548    INTR_CHECK(
 549                    (ch->interrupts & LAST_FRAME_INTR) &&
 550                    ((a->frame < a->frames - 1) || !a->element),
 551                    omap_dma_intr_last_frame,
 552                    (a->frames - a->frame - 2) * a->elements +
 553                    (a->elements - a->element + 1))
 554    INTR_CHECK(
 555                    ch->interrupts & HALF_FRAME_INTR,
 556                    omap_dma_intr_half_frame,
 557                    (a->elements >> 1) +
 558                    (a->element >= (a->elements >> 1) ? a->elements : 0) -
 559                    a->element)
 560    INTR_CHECK(
 561                    ch->sync && ch->fs && (ch->interrupts & END_FRAME_INTR),
 562                    omap_dma_intr_frame,
 563                    a->elements - a->element)
 564    INTR_CHECK(
 565                    ch->sync && ch->fs && !ch->bs,
 566                    omap_dma_intr_frame_sync,
 567                    a->elements - a->element)
 568
 569    /* Packets */
 570    INTR_CHECK(
 571                    ch->fs && ch->bs &&
 572                    (ch->interrupts & END_PKT_INTR) && !ch->src_sync,
 573                    omap_dma_intr_packet,
 574                    a->pck_elements - a->pck_element)
 575    INTR_CHECK(
 576                    ch->fs && ch->bs && ch->sync,
 577                    omap_dma_intr_packet_sync,
 578                    a->pck_elements - a->pck_element)
 579
 580    /* Blocks */
 581    INTR_CHECK(
 582                    1,
 583                    omap_dma_intr_block,
 584                    (a->frames - a->frame - 1) * a->elements +
 585                    (a->elements - a->element))
 586
 587    dma->bytes = min_elems * ch->data_type;
 588
 589    /* Set appropriate interrupts and/or deactivate channels */
 590
 591#ifdef MULTI_REQ
 592    /* TODO: should all of this only be done if dma->update, and otherwise
 593     * inside omap_dma_transfer_generic below - check what's faster.  */
 594    if (dma->update) {
 595#endif
 596
 597        /* If the channel is element synchronized, deactivate it */
 598        if (min_elems == elements[omap_dma_intr_element_sync])
 599            omap_dma_deactivate_channel(s, ch);
 600
 601        /* If it is the last frame, set the LAST_FRAME interrupt */
 602        if (min_elems == elements[omap_dma_intr_last_frame])
 603            ch->status |= LAST_FRAME_INTR;
 604
 605        /* If exactly half of the frame was reached, set the HALF_FRAME
 606           interrupt */
 607        if (min_elems == elements[omap_dma_intr_half_frame])
 608            ch->status |= HALF_FRAME_INTR;
 609
 610        /* If a full packet has been transferred, set the END_PKT interrupt */
 611        if (min_elems == elements[omap_dma_intr_packet])
 612            ch->status |= END_PKT_INTR;
 613
 614        /* If the channel is packet-synchronized, deactivate it */
 615        if (min_elems == elements[omap_dma_intr_packet_sync])
 616            omap_dma_deactivate_channel(s, ch);
 617
 618        /* If the channel is frame synchronized, deactivate it */
 619        if (min_elems == elements[omap_dma_intr_frame_sync])
 620            omap_dma_deactivate_channel(s, ch);
 621
 622        /* Set the END_FRAME interrupt */
 623        if (min_elems == elements[omap_dma_intr_frame])
 624            ch->status |= END_FRAME_INTR;
 625
 626        if (min_elems == elements[omap_dma_intr_block]) {
 627            /* End of Block */
 628            /* Disable the channel */
 629
 630            if (ch->omap_3_1_compatible_disable) {
 631                omap_dma_disable_channel(s, ch);
 632                if (ch->link_enabled)
 633                    omap_dma_enable_channel(s, &s->ch[ch->link_next_ch]);
 634            } else {
 635                if (!ch->auto_init)
 636                    omap_dma_disable_channel(s, ch);
 637                else if (ch->repeat || ch->end_prog)
 638                    omap_dma_channel_load(ch);
 639                else {
 640                    ch->waiting_end_prog = 1;
 641                    omap_dma_deactivate_channel(s, ch);
 642                }
 643            }
 644
 645            if (ch->interrupts & END_BLOCK_INTR)
 646                ch->status |= END_BLOCK_INTR;
 647        }
 648
 649        /* Update packet number */
 650        if (ch->fs && ch->bs) {
 651            a->pck_element += min_elems;
 652            a->pck_element %= a->pck_elements;
 653        }
 654
 655        /* TODO: check if we really need to update anything here or perhaps we
 656         * can skip part of this.  */
 657#ifndef MULTI_REQ
 658        if (dma->update) {
 659#endif
 660            a->element += min_elems;
 661
 662            frames = a->element / a->elements;
 663            a->element = a->element % a->elements;
 664            a->frame += frames;
 665            a->src += min_elems * a->elem_delta[0] + frames * a->frame_delta[0];
 666            a->dest += min_elems * a->elem_delta[1] + frames * a->frame_delta[1];
 667
 668            /* If the channel is async, update cpc */
 669            if (!ch->sync && frames)
 670                ch->cpc = a->dest & 0xffff;
 671
 672            /* TODO: if the destination port is IMIF or EMIFF, set the dirty
 673             * bits on it.  */
 674#ifndef MULTI_REQ
 675        }
 676#else
 677    }
 678#endif
 679
 680    omap_dma_interrupts_update(s);
 681}
 682
 683void omap_dma_reset(struct soc_dma_s *dma)
 684{
 685    int i;
 686    struct omap_dma_s *s = dma->opaque;
 687
 688    soc_dma_reset(s->dma);
 689    if (s->model < omap_dma_4)
 690        s->gcr = 0x0004;
 691    else
 692        s->gcr = 0x00010010;
 693    s->ocp = 0x00000000;
 694    memset(&s->irqstat, 0, sizeof(s->irqstat));
 695    memset(&s->irqen, 0, sizeof(s->irqen));
 696    s->lcd_ch.src = emiff;
 697    s->lcd_ch.condition = 0;
 698    s->lcd_ch.interrupts = 0;
 699    s->lcd_ch.dual = 0;
 700    if (s->model < omap_dma_4)
 701        omap_dma_enable_3_1_mapping(s);
 702    for (i = 0; i < s->chans; i ++) {
 703        s->ch[i].suspend = 0;
 704        s->ch[i].prefetch = 0;
 705        s->ch[i].buf_disable = 0;
 706        s->ch[i].src_sync = 0;
 707        memset(&s->ch[i].burst, 0, sizeof(s->ch[i].burst));
 708        memset(&s->ch[i].port, 0, sizeof(s->ch[i].port));
 709        memset(&s->ch[i].mode, 0, sizeof(s->ch[i].mode));
 710        memset(&s->ch[i].frame_index, 0, sizeof(s->ch[i].frame_index));
 711        memset(&s->ch[i].element_index, 0, sizeof(s->ch[i].element_index));
 712        memset(&s->ch[i].endian, 0, sizeof(s->ch[i].endian));
 713        memset(&s->ch[i].endian_lock, 0, sizeof(s->ch[i].endian_lock));
 714        memset(&s->ch[i].translate, 0, sizeof(s->ch[i].translate));
 715        s->ch[i].write_mode = 0;
 716        s->ch[i].data_type = 0;
 717        s->ch[i].transparent_copy = 0;
 718        s->ch[i].constant_fill = 0;
 719        s->ch[i].color = 0x00000000;
 720        s->ch[i].end_prog = 0;
 721        s->ch[i].repeat = 0;
 722        s->ch[i].auto_init = 0;
 723        s->ch[i].link_enabled = 0;
 724        if (s->model < omap_dma_4)
 725            s->ch[i].interrupts = 0x0003;
 726        else
 727            s->ch[i].interrupts = 0x0000;
 728        s->ch[i].status = 0;
 729        s->ch[i].cstatus = 0;
 730        s->ch[i].active = 0;
 731        s->ch[i].enable = 0;
 732        s->ch[i].sync = 0;
 733        s->ch[i].pending_request = 0;
 734        s->ch[i].waiting_end_prog = 0;
 735        s->ch[i].cpc = 0x0000;
 736        s->ch[i].fs = 0;
 737        s->ch[i].bs = 0;
 738        s->ch[i].omap_3_1_compatible_disable = 0;
 739        memset(&s->ch[i].active_set, 0, sizeof(s->ch[i].active_set));
 740        s->ch[i].priority = 0;
 741        s->ch[i].interleave_disabled = 0;
 742        s->ch[i].type = 0;
 743    }
 744}
 745
 746static int omap_dma_ch_reg_read(struct omap_dma_s *s,
 747                struct omap_dma_channel_s *ch, int reg, uint16_t *value)
 748{
 749    switch (reg) {
 750    case 0x00:  /* SYS_DMA_CSDP_CH0 */
 751        *value = (ch->burst[1] << 14) |
 752                (ch->pack[1] << 13) |
 753                (ch->port[1] << 9) |
 754                (ch->burst[0] << 7) |
 755                (ch->pack[0] << 6) |
 756                (ch->port[0] << 2) |
 757                (ch->data_type >> 1);
 758        break;
 759
 760    case 0x02:  /* SYS_DMA_CCR_CH0 */
 761        if (s->model <= omap_dma_3_1)
 762            *value = 0 << 10;                   /* FIFO_FLUSH reads as 0 */
 763        else
 764            *value = ch->omap_3_1_compatible_disable << 10;
 765        *value |= (ch->mode[1] << 14) |
 766                (ch->mode[0] << 12) |
 767                (ch->end_prog << 11) |
 768                (ch->repeat << 9) |
 769                (ch->auto_init << 8) |
 770                (ch->enable << 7) |
 771                (ch->priority << 6) |
 772                (ch->fs << 5) | ch->sync;
 773        break;
 774
 775    case 0x04:  /* SYS_DMA_CICR_CH0 */
 776        *value = ch->interrupts;
 777        break;
 778
 779    case 0x06:  /* SYS_DMA_CSR_CH0 */
 780        *value = ch->status;
 781        ch->status &= SYNC;
 782        if (!ch->omap_3_1_compatible_disable && ch->sibling) {
 783            *value |= (ch->sibling->status & 0x3f) << 6;
 784            ch->sibling->status &= SYNC;
 785        }
 786        qemu_irq_lower(ch->irq);
 787        break;
 788
 789    case 0x08:  /* SYS_DMA_CSSA_L_CH0 */
 790        *value = ch->addr[0] & 0x0000ffff;
 791        break;
 792
 793    case 0x0a:  /* SYS_DMA_CSSA_U_CH0 */
 794        *value = ch->addr[0] >> 16;
 795        break;
 796
 797    case 0x0c:  /* SYS_DMA_CDSA_L_CH0 */
 798        *value = ch->addr[1] & 0x0000ffff;
 799        break;
 800
 801    case 0x0e:  /* SYS_DMA_CDSA_U_CH0 */
 802        *value = ch->addr[1] >> 16;
 803        break;
 804
 805    case 0x10:  /* SYS_DMA_CEN_CH0 */
 806        *value = ch->elements;
 807        break;
 808
 809    case 0x12:  /* SYS_DMA_CFN_CH0 */
 810        *value = ch->frames;
 811        break;
 812
 813    case 0x14:  /* SYS_DMA_CFI_CH0 */
 814        *value = ch->frame_index[0];
 815        break;
 816
 817    case 0x16:  /* SYS_DMA_CEI_CH0 */
 818        *value = ch->element_index[0];
 819        break;
 820
 821    case 0x18:  /* SYS_DMA_CPC_CH0 or DMA_CSAC */
 822        if (ch->omap_3_1_compatible_disable)
 823            *value = ch->active_set.src & 0xffff;       /* CSAC */
 824        else
 825            *value = ch->cpc;
 826        break;
 827
 828    case 0x1a:  /* DMA_CDAC */
 829        *value = ch->active_set.dest & 0xffff;  /* CDAC */
 830        break;
 831
 832    case 0x1c:  /* DMA_CDEI */
 833        *value = ch->element_index[1];
 834        break;
 835
 836    case 0x1e:  /* DMA_CDFI */
 837        *value = ch->frame_index[1];
 838        break;
 839
 840    case 0x20:  /* DMA_COLOR_L */
 841        *value = ch->color & 0xffff;
 842        break;
 843
 844    case 0x22:  /* DMA_COLOR_U */
 845        *value = ch->color >> 16;
 846        break;
 847
 848    case 0x24:  /* DMA_CCR2 */
 849        *value = (ch->bs << 2) |
 850                (ch->transparent_copy << 1) |
 851                ch->constant_fill;
 852        break;
 853
 854    case 0x28:  /* DMA_CLNK_CTRL */
 855        *value = (ch->link_enabled << 15) |
 856                (ch->link_next_ch & 0xf);
 857        break;
 858
 859    case 0x2a:  /* DMA_LCH_CTRL */
 860        *value = (ch->interleave_disabled << 15) |
 861                ch->type;
 862        break;
 863
 864    default:
 865        return 1;
 866    }
 867    return 0;
 868}
 869
 870static int omap_dma_ch_reg_write(struct omap_dma_s *s,
 871                struct omap_dma_channel_s *ch, int reg, uint16_t value)
 872{
 873    switch (reg) {
 874    case 0x00:  /* SYS_DMA_CSDP_CH0 */
 875        ch->burst[1] = (value & 0xc000) >> 14;
 876        ch->pack[1] = (value & 0x2000) >> 13;
 877        ch->port[1] = (enum omap_dma_port) ((value & 0x1e00) >> 9);
 878        ch->burst[0] = (value & 0x0180) >> 7;
 879        ch->pack[0] = (value & 0x0040) >> 6;
 880        ch->port[0] = (enum omap_dma_port) ((value & 0x003c) >> 2);
 881        if (ch->port[0] >= __omap_dma_port_last) {
 882            qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid DMA port %i\n",
 883                          __func__, ch->port[0]);
 884        }
 885        if (ch->port[1] >= __omap_dma_port_last) {
 886            qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid DMA port %i\n",
 887                          __func__, ch->port[1]);
 888        }
 889        ch->data_type = 1 << (value & 3);
 890        if ((value & 3) == 3) {
 891            qemu_log_mask(LOG_GUEST_ERROR,
 892                          "%s: bad data_type for DMA channel\n", __func__);
 893            ch->data_type >>= 1;
 894        }
 895        break;
 896
 897    case 0x02:  /* SYS_DMA_CCR_CH0 */
 898        ch->mode[1] = (omap_dma_addressing_t) ((value & 0xc000) >> 14);
 899        ch->mode[0] = (omap_dma_addressing_t) ((value & 0x3000) >> 12);
 900        ch->end_prog = (value & 0x0800) >> 11;
 901        if (s->model >= omap_dma_3_2)
 902            ch->omap_3_1_compatible_disable  = (value >> 10) & 0x1;
 903        ch->repeat = (value & 0x0200) >> 9;
 904        ch->auto_init = (value & 0x0100) >> 8;
 905        ch->priority = (value & 0x0040) >> 6;
 906        ch->fs = (value & 0x0020) >> 5;
 907        ch->sync = value & 0x001f;
 908
 909        if (value & 0x0080)
 910            omap_dma_enable_channel(s, ch);
 911        else
 912            omap_dma_disable_channel(s, ch);
 913
 914        if (ch->end_prog)
 915            omap_dma_channel_end_prog(s, ch);
 916
 917        break;
 918
 919    case 0x04:  /* SYS_DMA_CICR_CH0 */
 920        ch->interrupts = value & 0x3f;
 921        break;
 922
 923    case 0x06:  /* SYS_DMA_CSR_CH0 */
 924        OMAP_RO_REG((hwaddr) reg);
 925        break;
 926
 927    case 0x08:  /* SYS_DMA_CSSA_L_CH0 */
 928        ch->addr[0] &= 0xffff0000;
 929        ch->addr[0] |= value;
 930        break;
 931
 932    case 0x0a:  /* SYS_DMA_CSSA_U_CH0 */
 933        ch->addr[0] &= 0x0000ffff;
 934        ch->addr[0] |= (uint32_t) value << 16;
 935        break;
 936
 937    case 0x0c:  /* SYS_DMA_CDSA_L_CH0 */
 938        ch->addr[1] &= 0xffff0000;
 939        ch->addr[1] |= value;
 940        break;
 941
 942    case 0x0e:  /* SYS_DMA_CDSA_U_CH0 */
 943        ch->addr[1] &= 0x0000ffff;
 944        ch->addr[1] |= (uint32_t) value << 16;
 945        break;
 946
 947    case 0x10:  /* SYS_DMA_CEN_CH0 */
 948        ch->elements = value;
 949        break;
 950
 951    case 0x12:  /* SYS_DMA_CFN_CH0 */
 952        ch->frames = value;
 953        break;
 954
 955    case 0x14:  /* SYS_DMA_CFI_CH0 */
 956        ch->frame_index[0] = (int16_t) value;
 957        break;
 958
 959    case 0x16:  /* SYS_DMA_CEI_CH0 */
 960        ch->element_index[0] = (int16_t) value;
 961        break;
 962
 963    case 0x18:  /* SYS_DMA_CPC_CH0 or DMA_CSAC */
 964        OMAP_RO_REG((hwaddr) reg);
 965        break;
 966
 967    case 0x1c:  /* DMA_CDEI */
 968        ch->element_index[1] = (int16_t) value;
 969        break;
 970
 971    case 0x1e:  /* DMA_CDFI */
 972        ch->frame_index[1] = (int16_t) value;
 973        break;
 974
 975    case 0x20:  /* DMA_COLOR_L */
 976        ch->color &= 0xffff0000;
 977        ch->color |= value;
 978        break;
 979
 980    case 0x22:  /* DMA_COLOR_U */
 981        ch->color &= 0xffff;
 982        ch->color |= (uint32_t)value << 16;
 983        break;
 984
 985    case 0x24:  /* DMA_CCR2 */
 986        ch->bs = (value >> 2) & 0x1;
 987        ch->transparent_copy = (value >> 1) & 0x1;
 988        ch->constant_fill = value & 0x1;
 989        break;
 990
 991    case 0x28:  /* DMA_CLNK_CTRL */
 992        ch->link_enabled = (value >> 15) & 0x1;
 993        if (value & (1 << 14)) {                        /* Stop_Lnk */
 994            ch->link_enabled = 0;
 995            omap_dma_disable_channel(s, ch);
 996        }
 997        ch->link_next_ch = value & 0x1f;
 998        break;
 999
1000    case 0x2a:  /* DMA_LCH_CTRL */
1001        ch->interleave_disabled = (value >> 15) & 0x1;
1002        ch->type = value & 0xf;
1003        break;
1004
1005    default:
1006        return 1;
1007    }
1008    return 0;
1009}
1010
1011static int omap_dma_3_2_lcd_write(struct omap_dma_lcd_channel_s *s, int offset,
1012                uint16_t value)
1013{
1014    switch (offset) {
1015    case 0xbc0: /* DMA_LCD_CSDP */
1016        s->brust_f2 = (value >> 14) & 0x3;
1017        s->pack_f2 = (value >> 13) & 0x1;
1018        s->data_type_f2 = (1 << ((value >> 11) & 0x3));
1019        s->brust_f1 = (value >> 7) & 0x3;
1020        s->pack_f1 = (value >> 6) & 0x1;
1021        s->data_type_f1 = (1 << ((value >> 0) & 0x3));
1022        break;
1023
1024    case 0xbc2: /* DMA_LCD_CCR */
1025        s->mode_f2 = (value >> 14) & 0x3;
1026        s->mode_f1 = (value >> 12) & 0x3;
1027        s->end_prog = (value >> 11) & 0x1;
1028        s->omap_3_1_compatible_disable = (value >> 10) & 0x1;
1029        s->repeat = (value >> 9) & 0x1;
1030        s->auto_init = (value >> 8) & 0x1;
1031        s->running = (value >> 7) & 0x1;
1032        s->priority = (value >> 6) & 0x1;
1033        s->bs = (value >> 4) & 0x1;
1034        break;
1035
1036    case 0xbc4: /* DMA_LCD_CTRL */
1037        s->dst = (value >> 8) & 0x1;
1038        s->src = ((value >> 6) & 0x3) << 1;
1039        s->condition = 0;
1040        /* Assume no bus errors and thus no BUS_ERROR irq bits.  */
1041        s->interrupts = (value >> 1) & 1;
1042        s->dual = value & 1;
1043        break;
1044
1045    case 0xbc8: /* TOP_B1_L */
1046        s->src_f1_top &= 0xffff0000;
1047        s->src_f1_top |= 0x0000ffff & value;
1048        break;
1049
1050    case 0xbca: /* TOP_B1_U */
1051        s->src_f1_top &= 0x0000ffff;
1052        s->src_f1_top |= (uint32_t)value << 16;
1053        break;
1054
1055    case 0xbcc: /* BOT_B1_L */
1056        s->src_f1_bottom &= 0xffff0000;
1057        s->src_f1_bottom |= 0x0000ffff & value;
1058        break;
1059
1060    case 0xbce: /* BOT_B1_U */
1061        s->src_f1_bottom &= 0x0000ffff;
1062        s->src_f1_bottom |= (uint32_t) value << 16;
1063        break;
1064
1065    case 0xbd0: /* TOP_B2_L */
1066        s->src_f2_top &= 0xffff0000;
1067        s->src_f2_top |= 0x0000ffff & value;
1068        break;
1069
1070    case 0xbd2: /* TOP_B2_U */
1071        s->src_f2_top &= 0x0000ffff;
1072        s->src_f2_top |= (uint32_t) value << 16;
1073        break;
1074
1075    case 0xbd4: /* BOT_B2_L */
1076        s->src_f2_bottom &= 0xffff0000;
1077        s->src_f2_bottom |= 0x0000ffff & value;
1078        break;
1079
1080    case 0xbd6: /* BOT_B2_U */
1081        s->src_f2_bottom &= 0x0000ffff;
1082        s->src_f2_bottom |= (uint32_t) value << 16;
1083        break;
1084
1085    case 0xbd8: /* DMA_LCD_SRC_EI_B1 */
1086        s->element_index_f1 = value;
1087        break;
1088
1089    case 0xbda: /* DMA_LCD_SRC_FI_B1_L */
1090        s->frame_index_f1 &= 0xffff0000;
1091        s->frame_index_f1 |= 0x0000ffff & value;
1092        break;
1093
1094    case 0xbf4: /* DMA_LCD_SRC_FI_B1_U */
1095        s->frame_index_f1 &= 0x0000ffff;
1096        s->frame_index_f1 |= (uint32_t) value << 16;
1097        break;
1098
1099    case 0xbdc: /* DMA_LCD_SRC_EI_B2 */
1100        s->element_index_f2 = value;
1101        break;
1102
1103    case 0xbde: /* DMA_LCD_SRC_FI_B2_L */
1104        s->frame_index_f2 &= 0xffff0000;
1105        s->frame_index_f2 |= 0x0000ffff & value;
1106        break;
1107
1108    case 0xbf6: /* DMA_LCD_SRC_FI_B2_U */
1109        s->frame_index_f2 &= 0x0000ffff;
1110        s->frame_index_f2 |= (uint32_t) value << 16;
1111        break;
1112
1113    case 0xbe0: /* DMA_LCD_SRC_EN_B1 */
1114        s->elements_f1 = value;
1115        break;
1116
1117    case 0xbe4: /* DMA_LCD_SRC_FN_B1 */
1118        s->frames_f1 = value;
1119        break;
1120
1121    case 0xbe2: /* DMA_LCD_SRC_EN_B2 */
1122        s->elements_f2 = value;
1123        break;
1124
1125    case 0xbe6: /* DMA_LCD_SRC_FN_B2 */
1126        s->frames_f2 = value;
1127        break;
1128
1129    case 0xbea: /* DMA_LCD_LCH_CTRL */
1130        s->lch_type = value & 0xf;
1131        break;
1132
1133    default:
1134        return 1;
1135    }
1136    return 0;
1137}
1138
1139static int omap_dma_3_2_lcd_read(struct omap_dma_lcd_channel_s *s, int offset,
1140                uint16_t *ret)
1141{
1142    switch (offset) {
1143    case 0xbc0: /* DMA_LCD_CSDP */
1144        *ret = (s->brust_f2 << 14) |
1145            (s->pack_f2 << 13) |
1146            ((s->data_type_f2 >> 1) << 11) |
1147            (s->brust_f1 << 7) |
1148            (s->pack_f1 << 6) |
1149            ((s->data_type_f1 >> 1) << 0);
1150        break;
1151
1152    case 0xbc2: /* DMA_LCD_CCR */
1153        *ret = (s->mode_f2 << 14) |
1154            (s->mode_f1 << 12) |
1155            (s->end_prog << 11) |
1156            (s->omap_3_1_compatible_disable << 10) |
1157            (s->repeat << 9) |
1158            (s->auto_init << 8) |
1159            (s->running << 7) |
1160            (s->priority << 6) |
1161            (s->bs << 4);
1162        break;
1163
1164    case 0xbc4: /* DMA_LCD_CTRL */
1165        qemu_irq_lower(s->irq);
1166        *ret = (s->dst << 8) |
1167            ((s->src & 0x6) << 5) |
1168            (s->condition << 3) |
1169            (s->interrupts << 1) |
1170            s->dual;
1171        break;
1172
1173    case 0xbc8: /* TOP_B1_L */
1174        *ret = s->src_f1_top & 0xffff;
1175        break;
1176
1177    case 0xbca: /* TOP_B1_U */
1178        *ret = s->src_f1_top >> 16;
1179        break;
1180
1181    case 0xbcc: /* BOT_B1_L */
1182        *ret = s->src_f1_bottom & 0xffff;
1183        break;
1184
1185    case 0xbce: /* BOT_B1_U */
1186        *ret = s->src_f1_bottom >> 16;
1187        break;
1188
1189    case 0xbd0: /* TOP_B2_L */
1190        *ret = s->src_f2_top & 0xffff;
1191        break;
1192
1193    case 0xbd2: /* TOP_B2_U */
1194        *ret = s->src_f2_top >> 16;
1195        break;
1196
1197    case 0xbd4: /* BOT_B2_L */
1198        *ret = s->src_f2_bottom & 0xffff;
1199        break;
1200
1201    case 0xbd6: /* BOT_B2_U */
1202        *ret = s->src_f2_bottom >> 16;
1203        break;
1204
1205    case 0xbd8: /* DMA_LCD_SRC_EI_B1 */
1206        *ret = s->element_index_f1;
1207        break;
1208
1209    case 0xbda: /* DMA_LCD_SRC_FI_B1_L */
1210        *ret = s->frame_index_f1 & 0xffff;
1211        break;
1212
1213    case 0xbf4: /* DMA_LCD_SRC_FI_B1_U */
1214        *ret = s->frame_index_f1 >> 16;
1215        break;
1216
1217    case 0xbdc: /* DMA_LCD_SRC_EI_B2 */
1218        *ret = s->element_index_f2;
1219        break;
1220
1221    case 0xbde: /* DMA_LCD_SRC_FI_B2_L */
1222        *ret = s->frame_index_f2 & 0xffff;
1223        break;
1224
1225    case 0xbf6: /* DMA_LCD_SRC_FI_B2_U */
1226        *ret = s->frame_index_f2 >> 16;
1227        break;
1228
1229    case 0xbe0: /* DMA_LCD_SRC_EN_B1 */
1230        *ret = s->elements_f1;
1231        break;
1232
1233    case 0xbe4: /* DMA_LCD_SRC_FN_B1 */
1234        *ret = s->frames_f1;
1235        break;
1236
1237    case 0xbe2: /* DMA_LCD_SRC_EN_B2 */
1238        *ret = s->elements_f2;
1239        break;
1240
1241    case 0xbe6: /* DMA_LCD_SRC_FN_B2 */
1242        *ret = s->frames_f2;
1243        break;
1244
1245    case 0xbea: /* DMA_LCD_LCH_CTRL */
1246        *ret = s->lch_type;
1247        break;
1248
1249    default:
1250        return 1;
1251    }
1252    return 0;
1253}
1254
1255static int omap_dma_3_1_lcd_write(struct omap_dma_lcd_channel_s *s, int offset,
1256                uint16_t value)
1257{
1258    switch (offset) {
1259    case 0x300: /* SYS_DMA_LCD_CTRL */
1260        s->src = (value & 0x40) ? imif : emiff;
1261        s->condition = 0;
1262        /* Assume no bus errors and thus no BUS_ERROR irq bits.  */
1263        s->interrupts = (value >> 1) & 1;
1264        s->dual = value & 1;
1265        break;
1266
1267    case 0x302: /* SYS_DMA_LCD_TOP_F1_L */
1268        s->src_f1_top &= 0xffff0000;
1269        s->src_f1_top |= 0x0000ffff & value;
1270        break;
1271
1272    case 0x304: /* SYS_DMA_LCD_TOP_F1_U */
1273        s->src_f1_top &= 0x0000ffff;
1274        s->src_f1_top |= (uint32_t)value << 16;
1275        break;
1276
1277    case 0x306: /* SYS_DMA_LCD_BOT_F1_L */
1278        s->src_f1_bottom &= 0xffff0000;
1279        s->src_f1_bottom |= 0x0000ffff & value;
1280        break;
1281
1282    case 0x308: /* SYS_DMA_LCD_BOT_F1_U */
1283        s->src_f1_bottom &= 0x0000ffff;
1284        s->src_f1_bottom |= (uint32_t)value << 16;
1285        break;
1286
1287    case 0x30a: /* SYS_DMA_LCD_TOP_F2_L */
1288        s->src_f2_top &= 0xffff0000;
1289        s->src_f2_top |= 0x0000ffff & value;
1290        break;
1291
1292    case 0x30c: /* SYS_DMA_LCD_TOP_F2_U */
1293        s->src_f2_top &= 0x0000ffff;
1294        s->src_f2_top |= (uint32_t)value << 16;
1295        break;
1296
1297    case 0x30e: /* SYS_DMA_LCD_BOT_F2_L */
1298        s->src_f2_bottom &= 0xffff0000;
1299        s->src_f2_bottom |= 0x0000ffff & value;
1300        break;
1301
1302    case 0x310: /* SYS_DMA_LCD_BOT_F2_U */
1303        s->src_f2_bottom &= 0x0000ffff;
1304        s->src_f2_bottom |= (uint32_t)value << 16;
1305        break;
1306
1307    default:
1308        return 1;
1309    }
1310    return 0;
1311}
1312
1313static int omap_dma_3_1_lcd_read(struct omap_dma_lcd_channel_s *s, int offset,
1314                uint16_t *ret)
1315{
1316    int i;
1317
1318    switch (offset) {
1319    case 0x300: /* SYS_DMA_LCD_CTRL */
1320        i = s->condition;
1321        s->condition = 0;
1322        qemu_irq_lower(s->irq);
1323        *ret = ((s->src == imif) << 6) | (i << 3) |
1324                (s->interrupts << 1) | s->dual;
1325        break;
1326
1327    case 0x302: /* SYS_DMA_LCD_TOP_F1_L */
1328        *ret = s->src_f1_top & 0xffff;
1329        break;
1330
1331    case 0x304: /* SYS_DMA_LCD_TOP_F1_U */
1332        *ret = s->src_f1_top >> 16;
1333        break;
1334
1335    case 0x306: /* SYS_DMA_LCD_BOT_F1_L */
1336        *ret = s->src_f1_bottom & 0xffff;
1337        break;
1338
1339    case 0x308: /* SYS_DMA_LCD_BOT_F1_U */
1340        *ret = s->src_f1_bottom >> 16;
1341        break;
1342
1343    case 0x30a: /* SYS_DMA_LCD_TOP_F2_L */
1344        *ret = s->src_f2_top & 0xffff;
1345        break;
1346
1347    case 0x30c: /* SYS_DMA_LCD_TOP_F2_U */
1348        *ret = s->src_f2_top >> 16;
1349        break;
1350
1351    case 0x30e: /* SYS_DMA_LCD_BOT_F2_L */
1352        *ret = s->src_f2_bottom & 0xffff;
1353        break;
1354
1355    case 0x310: /* SYS_DMA_LCD_BOT_F2_U */
1356        *ret = s->src_f2_bottom >> 16;
1357        break;
1358
1359    default:
1360        return 1;
1361    }
1362    return 0;
1363}
1364
1365static int omap_dma_sys_write(struct omap_dma_s *s, int offset, uint16_t value)
1366{
1367    switch (offset) {
1368    case 0x400: /* SYS_DMA_GCR */
1369        s->gcr = value;
1370        break;
1371
1372    case 0x404: /* DMA_GSCR */
1373        if (value & 0x8)
1374            omap_dma_disable_3_1_mapping(s);
1375        else
1376            omap_dma_enable_3_1_mapping(s);
1377        break;
1378
1379    case 0x408: /* DMA_GRST */
1380        if (value & 0x1)
1381            omap_dma_reset(s->dma);
1382        break;
1383
1384    default:
1385        return 1;
1386    }
1387    return 0;
1388}
1389
1390static int omap_dma_sys_read(struct omap_dma_s *s, int offset,
1391                uint16_t *ret)
1392{
1393    switch (offset) {
1394    case 0x400: /* SYS_DMA_GCR */
1395        *ret = s->gcr;
1396        break;
1397
1398    case 0x404: /* DMA_GSCR */
1399        *ret = s->omap_3_1_mapping_disabled << 3;
1400        break;
1401
1402    case 0x408: /* DMA_GRST */
1403        *ret = 0;
1404        break;
1405
1406    case 0x442: /* DMA_HW_ID */
1407    case 0x444: /* DMA_PCh2_ID */
1408    case 0x446: /* DMA_PCh0_ID */
1409    case 0x448: /* DMA_PCh1_ID */
1410    case 0x44a: /* DMA_PChG_ID */
1411    case 0x44c: /* DMA_PChD_ID */
1412        *ret = 1;
1413        break;
1414
1415    case 0x44e: /* DMA_CAPS_0_U */
1416        *ret = (s->caps[0] >> 16) & 0xffff;
1417        break;
1418    case 0x450: /* DMA_CAPS_0_L */
1419        *ret = (s->caps[0] >>  0) & 0xffff;
1420        break;
1421
1422    case 0x452: /* DMA_CAPS_1_U */
1423        *ret = (s->caps[1] >> 16) & 0xffff;
1424        break;
1425    case 0x454: /* DMA_CAPS_1_L */
1426        *ret = (s->caps[1] >>  0) & 0xffff;
1427        break;
1428
1429    case 0x456: /* DMA_CAPS_2 */
1430        *ret = s->caps[2];
1431        break;
1432
1433    case 0x458: /* DMA_CAPS_3 */
1434        *ret = s->caps[3];
1435        break;
1436
1437    case 0x45a: /* DMA_CAPS_4 */
1438        *ret = s->caps[4];
1439        break;
1440
1441    case 0x460: /* DMA_PCh2_SR */
1442    case 0x480: /* DMA_PCh0_SR */
1443    case 0x482: /* DMA_PCh1_SR */
1444    case 0x4c0: /* DMA_PChD_SR_0 */
1445        qemu_log_mask(LOG_UNIMP,
1446                      "%s: Physical Channel Status Registers not implemented\n",
1447                      __func__);
1448        *ret = 0xff;
1449        break;
1450
1451    default:
1452        return 1;
1453    }
1454    return 0;
1455}
1456
1457static uint64_t omap_dma_read(void *opaque, hwaddr addr,
1458                              unsigned size)
1459{
1460    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
1461    int reg, ch;
1462    uint16_t ret;
1463
1464    if (size != 2) {
1465        return omap_badwidth_read16(opaque, addr);
1466    }
1467
1468    switch (addr) {
1469    case 0x300 ... 0x3fe:
1470        if (s->model <= omap_dma_3_1 || !s->omap_3_1_mapping_disabled) {
1471            if (omap_dma_3_1_lcd_read(&s->lcd_ch, addr, &ret))
1472                break;
1473            return ret;
1474        }
1475        /* Fall through. */
1476    case 0x000 ... 0x2fe:
1477        reg = addr & 0x3f;
1478        ch = (addr >> 6) & 0x0f;
1479        if (omap_dma_ch_reg_read(s, &s->ch[ch], reg, &ret))
1480            break;
1481        return ret;
1482
1483    case 0x404 ... 0x4fe:
1484        if (s->model <= omap_dma_3_1)
1485            break;
1486        /* Fall through. */
1487    case 0x400:
1488        if (omap_dma_sys_read(s, addr, &ret))
1489            break;
1490        return ret;
1491
1492    case 0xb00 ... 0xbfe:
1493        if (s->model == omap_dma_3_2 && s->omap_3_1_mapping_disabled) {
1494            if (omap_dma_3_2_lcd_read(&s->lcd_ch, addr, &ret))
1495                break;
1496            return ret;
1497        }
1498        break;
1499    }
1500
1501    OMAP_BAD_REG(addr);
1502    return 0;
1503}
1504
1505static void omap_dma_write(void *opaque, hwaddr addr,
1506                           uint64_t value, unsigned size)
1507{
1508    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
1509    int reg, ch;
1510
1511    if (size != 2) {
1512        omap_badwidth_write16(opaque, addr, value);
1513        return;
1514    }
1515
1516    switch (addr) {
1517    case 0x300 ... 0x3fe:
1518        if (s->model <= omap_dma_3_1 || !s->omap_3_1_mapping_disabled) {
1519            if (omap_dma_3_1_lcd_write(&s->lcd_ch, addr, value))
1520                break;
1521            return;
1522        }
1523        /* Fall through.  */
1524    case 0x000 ... 0x2fe:
1525        reg = addr & 0x3f;
1526        ch = (addr >> 6) & 0x0f;
1527        if (omap_dma_ch_reg_write(s, &s->ch[ch], reg, value))
1528            break;
1529        return;
1530
1531    case 0x404 ... 0x4fe:
1532        if (s->model <= omap_dma_3_1)
1533            break;
1534    case 0x400:
1535        /* Fall through. */
1536        if (omap_dma_sys_write(s, addr, value))
1537            break;
1538        return;
1539
1540    case 0xb00 ... 0xbfe:
1541        if (s->model == omap_dma_3_2 && s->omap_3_1_mapping_disabled) {
1542            if (omap_dma_3_2_lcd_write(&s->lcd_ch, addr, value))
1543                break;
1544            return;
1545        }
1546        break;
1547    }
1548
1549    OMAP_BAD_REG(addr);
1550}
1551
1552static const MemoryRegionOps omap_dma_ops = {
1553    .read = omap_dma_read,
1554    .write = omap_dma_write,
1555    .endianness = DEVICE_NATIVE_ENDIAN,
1556};
1557
1558static void omap_dma_request(void *opaque, int drq, int req)
1559{
1560    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
1561    /* The request pins are level triggered in QEMU.  */
1562    if (req) {
1563        if (~s->dma->drqbmp & (1ULL << drq)) {
1564            s->dma->drqbmp |= 1ULL << drq;
1565            omap_dma_process_request(s, drq);
1566        }
1567    } else
1568        s->dma->drqbmp &= ~(1ULL << drq);
1569}
1570
1571/* XXX: this won't be needed once soc_dma knows about clocks.  */
1572static void omap_dma_clk_update(void *opaque, int line, int on)
1573{
1574    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
1575    int i;
1576
1577    s->dma->freq = omap_clk_getrate(s->clk);
1578
1579    for (i = 0; i < s->chans; i ++)
1580        if (s->ch[i].active)
1581            soc_dma_set_request(s->ch[i].dma, on);
1582}
1583
1584static void omap_dma_setcaps(struct omap_dma_s *s)
1585{
1586    switch (s->model) {
1587    default:
1588    case omap_dma_3_1:
1589        break;
1590    case omap_dma_3_2:
1591    case omap_dma_4:
1592        /* XXX Only available for sDMA */
1593        s->caps[0] =
1594                (1 << 19) |     /* Constant Fill Capability */
1595                (1 << 18);      /* Transparent BLT Capability */
1596        s->caps[1] =
1597                (1 << 1);       /* 1-bit palettized capability (DMA 3.2 only) */
1598        s->caps[2] =
1599                (1 << 8) |      /* SEPARATE_SRC_AND_DST_INDEX_CPBLTY */
1600                (1 << 7) |      /* DST_DOUBLE_INDEX_ADRS_CPBLTY */
1601                (1 << 6) |      /* DST_SINGLE_INDEX_ADRS_CPBLTY */
1602                (1 << 5) |      /* DST_POST_INCRMNT_ADRS_CPBLTY */
1603                (1 << 4) |      /* DST_CONST_ADRS_CPBLTY */
1604                (1 << 3) |      /* SRC_DOUBLE_INDEX_ADRS_CPBLTY */
1605                (1 << 2) |      /* SRC_SINGLE_INDEX_ADRS_CPBLTY */
1606                (1 << 1) |      /* SRC_POST_INCRMNT_ADRS_CPBLTY */
1607                (1 << 0);       /* SRC_CONST_ADRS_CPBLTY */
1608        s->caps[3] =
1609                (1 << 6) |      /* BLOCK_SYNCHR_CPBLTY (DMA 4 only) */
1610                (1 << 7) |      /* PKT_SYNCHR_CPBLTY (DMA 4 only) */
1611                (1 << 5) |      /* CHANNEL_CHAINING_CPBLTY */
1612                (1 << 4) |      /* LCh_INTERLEAVE_CPBLTY */
1613                (1 << 3) |      /* AUTOINIT_REPEAT_CPBLTY (DMA 3.2 only) */
1614                (1 << 2) |      /* AUTOINIT_ENDPROG_CPBLTY (DMA 3.2 only) */
1615                (1 << 1) |      /* FRAME_SYNCHR_CPBLTY */
1616                (1 << 0);       /* ELMNT_SYNCHR_CPBLTY */
1617        s->caps[4] =
1618                (1 << 7) |      /* PKT_INTERRUPT_CPBLTY (DMA 4 only) */
1619                (1 << 6) |      /* SYNC_STATUS_CPBLTY */
1620                (1 << 5) |      /* BLOCK_INTERRUPT_CPBLTY */
1621                (1 << 4) |      /* LAST_FRAME_INTERRUPT_CPBLTY */
1622                (1 << 3) |      /* FRAME_INTERRUPT_CPBLTY */
1623                (1 << 2) |      /* HALF_FRAME_INTERRUPT_CPBLTY */
1624                (1 << 1) |      /* EVENT_DROP_INTERRUPT_CPBLTY */
1625                (1 << 0);       /* TIMEOUT_INTERRUPT_CPBLTY (DMA 3.2 only) */
1626        break;
1627    }
1628}
1629
1630struct soc_dma_s *omap_dma_init(hwaddr base, qemu_irq *irqs,
1631                MemoryRegion *sysmem,
1632                qemu_irq lcd_irq, struct omap_mpu_state_s *mpu, omap_clk clk,
1633                enum omap_dma_model model)
1634{
1635    int num_irqs, memsize, i;
1636    struct omap_dma_s *s = g_new0(struct omap_dma_s, 1);
1637
1638    if (model <= omap_dma_3_1) {
1639        num_irqs = 6;
1640        memsize = 0x800;
1641    } else {
1642        num_irqs = 16;
1643        memsize = 0xc00;
1644    }
1645    s->model = model;
1646    s->mpu = mpu;
1647    s->clk = clk;
1648    s->lcd_ch.irq = lcd_irq;
1649    s->lcd_ch.mpu = mpu;
1650
1651    s->dma = soc_dma_init((model <= omap_dma_3_1) ? 9 : 16);
1652    s->dma->freq = omap_clk_getrate(clk);
1653    s->dma->transfer_fn = omap_dma_transfer_generic;
1654    s->dma->setup_fn = omap_dma_transfer_setup;
1655    s->dma->drq = qemu_allocate_irqs(omap_dma_request, s, 32);
1656    s->dma->opaque = s;
1657
1658    while (num_irqs --)
1659        s->ch[num_irqs].irq = irqs[num_irqs];
1660    for (i = 0; i < 3; i ++) {
1661        s->ch[i].sibling = &s->ch[i + 6];
1662        s->ch[i + 6].sibling = &s->ch[i];
1663    }
1664    for (i = (model <= omap_dma_3_1) ? 8 : 15; i >= 0; i --) {
1665        s->ch[i].dma = &s->dma->ch[i];
1666        s->dma->ch[i].opaque = &s->ch[i];
1667    }
1668
1669    omap_dma_setcaps(s);
1670    omap_clk_adduser(s->clk, qemu_allocate_irq(omap_dma_clk_update, s, 0));
1671    omap_dma_reset(s->dma);
1672    omap_dma_clk_update(s, 0, 1);
1673
1674    memory_region_init_io(&s->iomem, NULL, &omap_dma_ops, s, "omap.dma", memsize);
1675    memory_region_add_subregion(sysmem, base, &s->iomem);
1676
1677    mpu->drq = s->dma->drq;
1678
1679    return s->dma;
1680}
1681
1682static void omap_dma_interrupts_4_update(struct omap_dma_s *s)
1683{
1684    struct omap_dma_channel_s *ch = s->ch;
1685    uint32_t bmp, bit;
1686
1687    for (bmp = 0, bit = 1; bit; ch ++, bit <<= 1)
1688        if (ch->status) {
1689            bmp |= bit;
1690            ch->cstatus |= ch->status;
1691            ch->status = 0;
1692        }
1693    if ((s->irqstat[0] |= s->irqen[0] & bmp))
1694        qemu_irq_raise(s->irq[0]);
1695    if ((s->irqstat[1] |= s->irqen[1] & bmp))
1696        qemu_irq_raise(s->irq[1]);
1697    if ((s->irqstat[2] |= s->irqen[2] & bmp))
1698        qemu_irq_raise(s->irq[2]);
1699    if ((s->irqstat[3] |= s->irqen[3] & bmp))
1700        qemu_irq_raise(s->irq[3]);
1701}
1702
1703static uint64_t omap_dma4_read(void *opaque, hwaddr addr,
1704                               unsigned size)
1705{
1706    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
1707    int irqn = 0, chnum;
1708    struct omap_dma_channel_s *ch;
1709
1710    if (size == 1) {
1711        return omap_badwidth_read16(opaque, addr);
1712    }
1713
1714    switch (addr) {
1715    case 0x00:  /* DMA4_REVISION */
1716        return 0x40;
1717
1718    case 0x14:  /* DMA4_IRQSTATUS_L3 */
1719        irqn ++;
1720        /* fall through */
1721    case 0x10:  /* DMA4_IRQSTATUS_L2 */
1722        irqn ++;
1723        /* fall through */
1724    case 0x0c:  /* DMA4_IRQSTATUS_L1 */
1725        irqn ++;
1726        /* fall through */
1727    case 0x08:  /* DMA4_IRQSTATUS_L0 */
1728        return s->irqstat[irqn];
1729
1730    case 0x24:  /* DMA4_IRQENABLE_L3 */
1731        irqn ++;
1732        /* fall through */
1733    case 0x20:  /* DMA4_IRQENABLE_L2 */
1734        irqn ++;
1735        /* fall through */
1736    case 0x1c:  /* DMA4_IRQENABLE_L1 */
1737        irqn ++;
1738        /* fall through */
1739    case 0x18:  /* DMA4_IRQENABLE_L0 */
1740        return s->irqen[irqn];
1741
1742    case 0x28:  /* DMA4_SYSSTATUS */
1743        return 1;                                               /* RESETDONE */
1744
1745    case 0x2c:  /* DMA4_OCP_SYSCONFIG */
1746        return s->ocp;
1747
1748    case 0x64:  /* DMA4_CAPS_0 */
1749        return s->caps[0];
1750    case 0x6c:  /* DMA4_CAPS_2 */
1751        return s->caps[2];
1752    case 0x70:  /* DMA4_CAPS_3 */
1753        return s->caps[3];
1754    case 0x74:  /* DMA4_CAPS_4 */
1755        return s->caps[4];
1756
1757    case 0x78:  /* DMA4_GCR */
1758        return s->gcr;
1759
1760    case 0x80 ... 0xfff:
1761        addr -= 0x80;
1762        chnum = addr / 0x60;
1763        ch = s->ch + chnum;
1764        addr -= chnum * 0x60;
1765        break;
1766
1767    default:
1768        OMAP_BAD_REG(addr);
1769        return 0;
1770    }
1771
1772    /* Per-channel registers */
1773    switch (addr) {
1774    case 0x00:  /* DMA4_CCR */
1775        return (ch->buf_disable << 25) |
1776                (ch->src_sync << 24) |
1777                (ch->prefetch << 23) |
1778                ((ch->sync & 0x60) << 14) |
1779                (ch->bs << 18) |
1780                (ch->transparent_copy << 17) |
1781                (ch->constant_fill << 16) |
1782                (ch->mode[1] << 14) |
1783                (ch->mode[0] << 12) |
1784                (0 << 10) | (0 << 9) |
1785                (ch->suspend << 8) |
1786                (ch->enable << 7) |
1787                (ch->priority << 6) |
1788                (ch->fs << 5) | (ch->sync & 0x1f);
1789
1790    case 0x04:  /* DMA4_CLNK_CTRL */
1791        return (ch->link_enabled << 15) | ch->link_next_ch;
1792
1793    case 0x08:  /* DMA4_CICR */
1794        return ch->interrupts;
1795
1796    case 0x0c:  /* DMA4_CSR */
1797        return ch->cstatus;
1798
1799    case 0x10:  /* DMA4_CSDP */
1800        return (ch->endian[0] << 21) |
1801                (ch->endian_lock[0] << 20) |
1802                (ch->endian[1] << 19) |
1803                (ch->endian_lock[1] << 18) |
1804                (ch->write_mode << 16) |
1805                (ch->burst[1] << 14) |
1806                (ch->pack[1] << 13) |
1807                (ch->translate[1] << 9) |
1808                (ch->burst[0] << 7) |
1809                (ch->pack[0] << 6) |
1810                (ch->translate[0] << 2) |
1811                (ch->data_type >> 1);
1812
1813    case 0x14:  /* DMA4_CEN */
1814        return ch->elements;
1815
1816    case 0x18:  /* DMA4_CFN */
1817        return ch->frames;
1818
1819    case 0x1c:  /* DMA4_CSSA */
1820        return ch->addr[0];
1821
1822    case 0x20:  /* DMA4_CDSA */
1823        return ch->addr[1];
1824
1825    case 0x24:  /* DMA4_CSEI */
1826        return ch->element_index[0];
1827
1828    case 0x28:  /* DMA4_CSFI */
1829        return ch->frame_index[0];
1830
1831    case 0x2c:  /* DMA4_CDEI */
1832        return ch->element_index[1];
1833
1834    case 0x30:  /* DMA4_CDFI */
1835        return ch->frame_index[1];
1836
1837    case 0x34:  /* DMA4_CSAC */
1838        return ch->active_set.src & 0xffff;
1839
1840    case 0x38:  /* DMA4_CDAC */
1841        return ch->active_set.dest & 0xffff;
1842
1843    case 0x3c:  /* DMA4_CCEN */
1844        return ch->active_set.element;
1845
1846    case 0x40:  /* DMA4_CCFN */
1847        return ch->active_set.frame;
1848
1849    case 0x44:  /* DMA4_COLOR */
1850        /* XXX only in sDMA */
1851        return ch->color;
1852
1853    default:
1854        OMAP_BAD_REG(addr);
1855        return 0;
1856    }
1857}
1858
1859static void omap_dma4_write(void *opaque, hwaddr addr,
1860                            uint64_t value, unsigned size)
1861{
1862    struct omap_dma_s *s = (struct omap_dma_s *) opaque;
1863    int chnum, irqn = 0;
1864    struct omap_dma_channel_s *ch;
1865
1866    if (size == 1) {
1867        omap_badwidth_write16(opaque, addr, value);
1868        return;
1869    }
1870
1871    switch (addr) {
1872    case 0x14:  /* DMA4_IRQSTATUS_L3 */
1873        irqn ++;
1874        /* fall through */
1875    case 0x10:  /* DMA4_IRQSTATUS_L2 */
1876        irqn ++;
1877        /* fall through */
1878    case 0x0c:  /* DMA4_IRQSTATUS_L1 */
1879        irqn ++;
1880        /* fall through */
1881    case 0x08:  /* DMA4_IRQSTATUS_L0 */
1882        s->irqstat[irqn] &= ~value;
1883        if (!s->irqstat[irqn])
1884            qemu_irq_lower(s->irq[irqn]);
1885        return;
1886
1887    case 0x24:  /* DMA4_IRQENABLE_L3 */
1888        irqn ++;
1889        /* fall through */
1890    case 0x20:  /* DMA4_IRQENABLE_L2 */
1891        irqn ++;
1892        /* fall through */
1893    case 0x1c:  /* DMA4_IRQENABLE_L1 */
1894        irqn ++;
1895        /* fall through */
1896    case 0x18:  /* DMA4_IRQENABLE_L0 */
1897        s->irqen[irqn] = value;
1898        return;
1899
1900    case 0x2c:  /* DMA4_OCP_SYSCONFIG */
1901        if (value & 2)                                          /* SOFTRESET */
1902            omap_dma_reset(s->dma);
1903        s->ocp = value & 0x3321;
1904        if (((s->ocp >> 12) & 3) == 3) { /* MIDLEMODE */
1905            qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid DMA power mode\n",
1906                          __func__);
1907        }
1908        return;
1909
1910    case 0x78:  /* DMA4_GCR */
1911        s->gcr = value & 0x00ff00ff;
1912        if ((value & 0xff) == 0x00) { /* MAX_CHANNEL_FIFO_DEPTH */
1913            qemu_log_mask(LOG_GUEST_ERROR, "%s: wrong FIFO depth in GCR\n",
1914                          __func__);
1915        }
1916        return;
1917
1918    case 0x80 ... 0xfff:
1919        addr -= 0x80;
1920        chnum = addr / 0x60;
1921        ch = s->ch + chnum;
1922        addr -= chnum * 0x60;
1923        break;
1924
1925    case 0x00:  /* DMA4_REVISION */
1926    case 0x28:  /* DMA4_SYSSTATUS */
1927    case 0x64:  /* DMA4_CAPS_0 */
1928    case 0x6c:  /* DMA4_CAPS_2 */
1929    case 0x70:  /* DMA4_CAPS_3 */
1930    case 0x74:  /* DMA4_CAPS_4 */
1931        OMAP_RO_REG(addr);
1932        return;
1933
1934    default:
1935        OMAP_BAD_REG(addr);
1936        return;
1937    }
1938
1939    /* Per-channel registers */
1940    switch (addr) {
1941    case 0x00:  /* DMA4_CCR */
1942        ch->buf_disable = (value >> 25) & 1;
1943        ch->src_sync = (value >> 24) & 1;       /* XXX For CamDMA must be 1 */
1944        if (ch->buf_disable && !ch->src_sync) {
1945            qemu_log_mask(LOG_GUEST_ERROR,
1946                          "%s: Buffering disable is not allowed in "
1947                          "destination synchronised mode\n", __func__);
1948        }
1949        ch->prefetch = (value >> 23) & 1;
1950        ch->bs = (value >> 18) & 1;
1951        ch->transparent_copy = (value >> 17) & 1;
1952        ch->constant_fill = (value >> 16) & 1;
1953        ch->mode[1] = (omap_dma_addressing_t) ((value & 0xc000) >> 14);
1954        ch->mode[0] = (omap_dma_addressing_t) ((value & 0x3000) >> 12);
1955        ch->suspend = (value & 0x0100) >> 8;
1956        ch->priority = (value & 0x0040) >> 6;
1957        ch->fs = (value & 0x0020) >> 5;
1958        if (ch->fs && ch->bs && ch->mode[0] && ch->mode[1]) {
1959            qemu_log_mask(LOG_GUEST_ERROR,
1960                          "%s: For a packet transfer at least one port "
1961                          "must be constant-addressed\n", __func__);
1962        }
1963        ch->sync = (value & 0x001f) | ((value >> 14) & 0x0060);
1964        /* XXX must be 0x01 for CamDMA */
1965
1966        if (value & 0x0080)
1967            omap_dma_enable_channel(s, ch);
1968        else
1969            omap_dma_disable_channel(s, ch);
1970
1971        break;
1972
1973    case 0x04:  /* DMA4_CLNK_CTRL */
1974        ch->link_enabled = (value >> 15) & 0x1;
1975        ch->link_next_ch = value & 0x1f;
1976        break;
1977
1978    case 0x08:  /* DMA4_CICR */
1979        ch->interrupts = value & 0x09be;
1980        break;
1981
1982    case 0x0c:  /* DMA4_CSR */
1983        ch->cstatus &= ~value;
1984        break;
1985
1986    case 0x10:  /* DMA4_CSDP */
1987        ch->endian[0] =(value >> 21) & 1;
1988        ch->endian_lock[0] =(value >> 20) & 1;
1989        ch->endian[1] =(value >> 19) & 1;
1990        ch->endian_lock[1] =(value >> 18) & 1;
1991        if (ch->endian[0] != ch->endian[1]) {
1992            qemu_log_mask(LOG_GUEST_ERROR,
1993                          "%s: DMA endianness conversion enable attempt\n",
1994                          __func__);
1995        }
1996        ch->write_mode = (value >> 16) & 3;
1997        ch->burst[1] = (value & 0xc000) >> 14;
1998        ch->pack[1] = (value & 0x2000) >> 13;
1999        ch->translate[1] = (value & 0x1e00) >> 9;
2000        ch->burst[0] = (value & 0x0180) >> 7;
2001        ch->pack[0] = (value & 0x0040) >> 6;
2002        ch->translate[0] = (value & 0x003c) >> 2;
2003        if (ch->translate[0] | ch->translate[1]) {
2004            qemu_log_mask(LOG_GUEST_ERROR,
2005                          "%s: bad MReqAddressTranslate sideband signal\n",
2006                          __func__);
2007        }
2008        ch->data_type = 1 << (value & 3);
2009        if ((value & 3) == 3) {
2010            qemu_log_mask(LOG_GUEST_ERROR,
2011                          "%s: bad data_type for DMA channel\n", __func__);
2012            ch->data_type >>= 1;
2013        }
2014        break;
2015
2016    case 0x14:  /* DMA4_CEN */
2017        ch->set_update = 1;
2018        ch->elements = value & 0xffffff;
2019        break;
2020
2021    case 0x18:  /* DMA4_CFN */
2022        ch->frames = value & 0xffff;
2023        ch->set_update = 1;
2024        break;
2025
2026    case 0x1c:  /* DMA4_CSSA */
2027        ch->addr[0] = (hwaddr) (uint32_t) value;
2028        ch->set_update = 1;
2029        break;
2030
2031    case 0x20:  /* DMA4_CDSA */
2032        ch->addr[1] = (hwaddr) (uint32_t) value;
2033        ch->set_update = 1;
2034        break;
2035
2036    case 0x24:  /* DMA4_CSEI */
2037        ch->element_index[0] = (int16_t) value;
2038        ch->set_update = 1;
2039        break;
2040
2041    case 0x28:  /* DMA4_CSFI */
2042        ch->frame_index[0] = (int32_t) value;
2043        ch->set_update = 1;
2044        break;
2045
2046    case 0x2c:  /* DMA4_CDEI */
2047        ch->element_index[1] = (int16_t) value;
2048        ch->set_update = 1;
2049        break;
2050
2051    case 0x30:  /* DMA4_CDFI */
2052        ch->frame_index[1] = (int32_t) value;
2053        ch->set_update = 1;
2054        break;
2055
2056    case 0x44:  /* DMA4_COLOR */
2057        /* XXX only in sDMA */
2058        ch->color = value;
2059        break;
2060
2061    case 0x34:  /* DMA4_CSAC */
2062    case 0x38:  /* DMA4_CDAC */
2063    case 0x3c:  /* DMA4_CCEN */
2064    case 0x40:  /* DMA4_CCFN */
2065        OMAP_RO_REG(addr);
2066        break;
2067
2068    default:
2069        OMAP_BAD_REG(addr);
2070    }
2071}
2072
2073static const MemoryRegionOps omap_dma4_ops = {
2074    .read = omap_dma4_read,
2075    .write = omap_dma4_write,
2076    .endianness = DEVICE_NATIVE_ENDIAN,
2077};
2078
2079struct soc_dma_s *omap_dma4_init(hwaddr base, qemu_irq *irqs,
2080                MemoryRegion *sysmem,
2081                struct omap_mpu_state_s *mpu, int fifo,
2082                int chans, omap_clk iclk, omap_clk fclk)
2083{
2084    int i;
2085    struct omap_dma_s *s = g_new0(struct omap_dma_s, 1);
2086
2087    s->model = omap_dma_4;
2088    s->chans = chans;
2089    s->mpu = mpu;
2090    s->clk = fclk;
2091
2092    s->dma = soc_dma_init(s->chans);
2093    s->dma->freq = omap_clk_getrate(fclk);
2094    s->dma->transfer_fn = omap_dma_transfer_generic;
2095    s->dma->setup_fn = omap_dma_transfer_setup;
2096    s->dma->drq = qemu_allocate_irqs(omap_dma_request, s, 64);
2097    s->dma->opaque = s;
2098    for (i = 0; i < s->chans; i ++) {
2099        s->ch[i].dma = &s->dma->ch[i];
2100        s->dma->ch[i].opaque = &s->ch[i];
2101    }
2102
2103    memcpy(&s->irq, irqs, sizeof(s->irq));
2104    s->intr_update = omap_dma_interrupts_4_update;
2105
2106    omap_dma_setcaps(s);
2107    omap_clk_adduser(s->clk, qemu_allocate_irq(omap_dma_clk_update, s, 0));
2108    omap_dma_reset(s->dma);
2109    omap_dma_clk_update(s, 0, !!s->dma->freq);
2110
2111    memory_region_init_io(&s->iomem, NULL, &omap_dma4_ops, s, "omap.dma4", 0x1000);
2112    memory_region_add_subregion(sysmem, base, &s->iomem);
2113
2114    mpu->drq = s->dma->drq;
2115
2116    return s->dma;
2117}
2118
2119struct omap_dma_lcd_channel_s *omap_dma_get_lcdch(struct soc_dma_s *dma)
2120{
2121    struct omap_dma_s *s = dma->opaque;
2122
2123    return &s->lcd_ch;
2124}
2125