/*
 * OMAP2 Display Subsystem.
 *
 * Copyright (C) 2008 Nokia Corporation
 * Written by Andrzej Zaborowski <andrew@openedhand.com>
 *
 * 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 or
 * (at your option) version 3 of the License.
 *
 * 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/osdep.h"
#include "qemu/log.h"
#include "hw/hw.h"
#include "hw/irq.h"
#include "ui/console.h"
#include "hw/arm/omap.h"

struct omap_dss_s {
    qemu_irq irq;
    qemu_irq drq;
    DisplayState *state;
    MemoryRegion iomem_diss1, iomem_disc1, iomem_rfbi1, iomem_venc1, iomem_im3;

    int autoidle;
    int control;
    int enable;

    struct omap_dss_panel_s {
        int enable;
        int nx;
        int ny;

        int x;
        int y;
    } dig, lcd;

    struct {
        uint32_t idlemode;
        uint32_t irqst;
        uint32_t irqen;
        uint32_t control;
        uint32_t config;
        uint32_t capable;
        uint32_t timing[4];
        int line;
        uint32_t bg[2];
        uint32_t trans[2];

        struct omap_dss_plane_s {
            int enable;
            int bpp;
            int posx;
            int posy;
            int nx;
            int ny;

            hwaddr addr[3];

            uint32_t attr;
            uint32_t tresh;
            int rowinc;
            int colinc;
            int wininc;
        } l[3];

        int invalidate;
        uint16_t palette[256];
    } dispc;

    struct {
        int idlemode;
        uint32_t control;
        int enable;
        int pixels;
        int busy;
        int skiplines;
        uint16_t rxbuf;
        uint32_t config[2];
        uint32_t time[4];
        uint32_t data[6];
        uint16_t vsync;
        uint16_t hsync;
        struct rfbi_chip_s *chip[2];
    } rfbi;
};

static void omap_dispc_interrupt_update(struct omap_dss_s *s)
{
    qemu_set_irq(s->irq, s->dispc.irqst & s->dispc.irqen);
}

static void omap_rfbi_reset(struct omap_dss_s *s)
{
    s->rfbi.idlemode = 0;
    s->rfbi.control = 2;
    s->rfbi.enable = 0;
    s->rfbi.pixels = 0;
    s->rfbi.skiplines = 0;
    s->rfbi.busy = 0;
    s->rfbi.config[0] = 0x00310000;
    s->rfbi.config[1] = 0x00310000;
    s->rfbi.time[0] = 0;
    s->rfbi.time[1] = 0;
    s->rfbi.time[2] = 0;
    s->rfbi.time[3] = 0;
    s->rfbi.data[0] = 0;
    s->rfbi.data[1] = 0;
    s->rfbi.data[2] = 0;
    s->rfbi.data[3] = 0;
    s->rfbi.data[4] = 0;
    s->rfbi.data[5] = 0;
    s->rfbi.vsync = 0;
    s->rfbi.hsync = 0;
}

void omap_dss_reset(struct omap_dss_s *s)
{
    s->autoidle = 0;
    s->control = 0;
    s->enable = 0;

    s->dig.enable = 0;
    s->dig.nx = 1;
    s->dig.ny = 1;

    s->lcd.enable = 0;
    s->lcd.nx = 1;
    s->lcd.ny = 1;

    s->dispc.idlemode = 0;
    s->dispc.irqst = 0;
    s->dispc.irqen = 0;
    s->dispc.control = 0;
    s->dispc.config = 0;
    s->dispc.capable = 0x161;
    s->dispc.timing[0] = 0;
    s->dispc.timing[1] = 0;
    s->dispc.timing[2] = 0;
    s->dispc.timing[3] = 0;
    s->dispc.line = 0;
    s->dispc.bg[0] = 0;
    s->dispc.bg[1] = 0;
    s->dispc.trans[0] = 0;
    s->dispc.trans[1] = 0;

    s->dispc.l[0].enable = 0;
    s->dispc.l[0].bpp = 0;
    s->dispc.l[0].addr[0] = 0;
    s->dispc.l[0].addr[1] = 0;
    s->dispc.l[0].addr[2] = 0;
    s->dispc.l[0].posx = 0;
    s->dispc.l[0].posy = 0;
    s->dispc.l[0].nx = 1;
    s->dispc.l[0].ny = 1;
    s->dispc.l[0].attr = 0;
    s->dispc.l[0].tresh = 0;
    s->dispc.l[0].rowinc = 1;
    s->dispc.l[0].colinc = 1;
    s->dispc.l[0].wininc = 0;

    omap_rfbi_reset(s);
    omap_dispc_interrupt_update(s);
}

static uint64_t omap_diss_read(void *opaque, hwaddr addr,
                               unsigned size)
{
    struct omap_dss_s *s = (struct omap_dss_s *) opaque;

    if (size != 4) {
        return omap_badwidth_read32(opaque, addr);
    }

    switch (addr) {
    case 0x00:  /* DSS_REVISIONNUMBER */
        return 0x20;

    case 0x10:  /* DSS_SYSCONFIG */
        return s->autoidle;

    case 0x14:  /* DSS_SYSSTATUS */
        return 1;                       /* RESETDONE */

    case 0x40:  /* DSS_CONTROL */
        return s->control;

    case 0x50:  /* DSS_PSA_LCD_REG_1 */
    case 0x54:  /* DSS_PSA_LCD_REG_2 */
    case 0x58:  /* DSS_PSA_VIDEO_REG */
        /* TODO: fake some values when appropriate s->control bits are set */
        return 0;

    case 0x5c:  /* DSS_STATUS */
        return 1 + (s->control & 1);

    default:
        break;
    }
    OMAP_BAD_REG(addr);
    return 0;
}

static void omap_diss_write(void *opaque, hwaddr addr,
                            uint64_t value, unsigned size)
{
    struct omap_dss_s *s = (struct omap_dss_s *) opaque;

    if (size != 4) {
        omap_badwidth_write32(opaque, addr, value);
        return;
    }

    switch (addr) {
    case 0x00:  /* DSS_REVISIONNUMBER */
    case 0x14:  /* DSS_SYSSTATUS */
    case 0x50:  /* DSS_PSA_LCD_REG_1 */
    case 0x54:  /* DSS_PSA_LCD_REG_2 */
    case 0x58:  /* DSS_PSA_VIDEO_REG */
    case 0x5c:  /* DSS_STATUS */
        OMAP_RO_REG(addr);
        break;

    case 0x10:  /* DSS_SYSCONFIG */
        if (value & 2)                      /* SOFTRESET */
            omap_dss_reset(s);
        s->autoidle = value & 1;
        break;

    case 0x40:  /* DSS_CONTROL */
        s->control = value & 0x3dd;
        break;

    default:
        OMAP_BAD_REG(addr);
    }
}

static const MemoryRegionOps omap_diss_ops = {
    .read = omap_diss_read,
    .write = omap_diss_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static uint64_t omap_disc_read(void *opaque, hwaddr addr,
                               unsigned size)
{
    struct omap_dss_s *s = (struct omap_dss_s *) opaque;

    if (size != 4) {
        return omap_badwidth_read32(opaque, addr);
    }

    switch (addr) {
    case 0x000: /* DISPC_REVISION */
        return 0x20;

    case 0x010: /* DISPC_SYSCONFIG */
        return s->dispc.idlemode;

    case 0x014: /* DISPC_SYSSTATUS */
        return 1;                       /* RESETDONE */

    case 0x018: /* DISPC_IRQSTATUS */
        return s->dispc.irqst;

    case 0x01c: /* DISPC_IRQENABLE */
        return s->dispc.irqen;

    case 0x040: /* DISPC_CONTROL */
        return s->dispc.control;

    case 0x044: /* DISPC_CONFIG */
        return s->dispc.config;

    case 0x048: /* DISPC_CAPABLE */
        return s->dispc.capable;

    case 0x04c: /* DISPC_DEFAULT_COLOR0 */
        return s->dispc.bg[0];
    case 0x050: /* DISPC_DEFAULT_COLOR1 */
        return s->dispc.bg[1];
    case 0x054: /* DISPC_TRANS_COLOR0 */
        return s->dispc.trans[0];
    case 0x058: /* DISPC_TRANS_COLOR1 */
        return s->dispc.trans[1];

    case 0x05c: /* DISPC_LINE_STATUS */
        return 0x7ff;
    case 0x060: /* DISPC_LINE_NUMBER */
        return s->dispc.line;

    case 0x064: /* DISPC_TIMING_H */
        return s->dispc.timing[0];
    case 0x068: /* DISPC_TIMING_V */
        return s->dispc.timing[1];
    case 0x06c: /* DISPC_POL_FREQ */
        return s->dispc.timing[2];
    case 0x070: /* DISPC_DIVISOR */
        return s->dispc.timing[3];

    case 0x078: /* DISPC_SIZE_DIG */
        return ((s->dig.ny - 1) << 16) | (s->dig.nx - 1);
    case 0x07c: /* DISPC_SIZE_LCD */
        return ((s->lcd.ny - 1) << 16) | (s->lcd.nx - 1);

    case 0x080: /* DISPC_GFX_BA0 */
        return s->dispc.l[0].addr[0];
    case 0x084: /* DISPC_GFX_BA1 */
        return s->dispc.l[0].addr[1];
    case 0x088: /* DISPC_GFX_POSITION */
        return (s->dispc.l[0].posy << 16) | s->dispc.l[0].posx;
    case 0x08c: /* DISPC_GFX_SIZE */
        return ((s->dispc.l[0].ny - 1) << 16) | (s->dispc.l[0].nx - 1);
    case 0x0a0: /* DISPC_GFX_ATTRIBUTES */
        return s->dispc.l[0].attr;
    case 0x0a4: /* DISPC_GFX_FIFO_TRESHOLD */
        return s->dispc.l[0].tresh;
    case 0x0a8: /* DISPC_GFX_FIFO_SIZE_STATUS */
        return 256;
    case 0x0ac: /* DISPC_GFX_ROW_INC */
        return s->dispc.l[0].rowinc;
    case 0x0b0: /* DISPC_GFX_PIXEL_INC */
        return s->dispc.l[0].colinc;
    case 0x0b4: /* DISPC_GFX_WINDOW_SKIP */
        return s->dispc.l[0].wininc;
    case 0x0b8: /* DISPC_GFX_TABLE_BA */
        return s->dispc.l[0].addr[2];

    case 0x0bc: /* DISPC_VID1_BA0 */
    case 0x0c0: /* DISPC_VID1_BA1 */
    case 0x0c4: /* DISPC_VID1_POSITION */
    case 0x0c8: /* DISPC_VID1_SIZE */
    case 0x0cc: /* DISPC_VID1_ATTRIBUTES */
    case 0x0d0: /* DISPC_VID1_FIFO_TRESHOLD */
    case 0x0d4: /* DISPC_VID1_FIFO_SIZE_STATUS */
    case 0x0d8: /* DISPC_VID1_ROW_INC */
    case 0x0dc: /* DISPC_VID1_PIXEL_INC */
    case 0x0e0: /* DISPC_VID1_FIR */
    case 0x0e4: /* DISPC_VID1_PICTURE_SIZE */
    case 0x0e8: /* DISPC_VID1_ACCU0 */
    case 0x0ec: /* DISPC_VID1_ACCU1 */
    case 0x0f0 ... 0x140:   /* DISPC_VID1_FIR_COEF, DISPC_VID1_CONV_COEF */
    case 0x14c: /* DISPC_VID2_BA0 */
    case 0x150: /* DISPC_VID2_BA1 */
    case 0x154: /* DISPC_VID2_POSITION */
    case 0x158: /* DISPC_VID2_SIZE */
    case 0x15c: /* DISPC_VID2_ATTRIBUTES */
    case 0x160: /* DISPC_VID2_FIFO_TRESHOLD */
    case 0x164: /* DISPC_VID2_FIFO_SIZE_STATUS */
    case 0x168: /* DISPC_VID2_ROW_INC */
    case 0x16c: /* DISPC_VID2_PIXEL_INC */
    case 0x170: /* DISPC_VID2_FIR */
    case 0x174: /* DISPC_VID2_PICTURE_SIZE */
    case 0x178: /* DISPC_VID2_ACCU0 */
    case 0x17c: /* DISPC_VID2_ACCU1 */
    case 0x180 ... 0x1d0:   /* DISPC_VID2_FIR_COEF, DISPC_VID2_CONV_COEF */
    case 0x1d4: /* DISPC_DATA_CYCLE1 */
    case 0x1d8: /* DISPC_DATA_CYCLE2 */
    case 0x1dc: /* DISPC_DATA_CYCLE3 */
        return 0;

    default:
        break;
    }
    OMAP_BAD_REG(addr);
    return 0;
}

static void omap_disc_write(void *opaque, hwaddr addr,
                            uint64_t value, unsigned size)
{
    struct omap_dss_s *s = (struct omap_dss_s *) opaque;

    if (size != 4) {
        omap_badwidth_write32(opaque, addr, value);
        return;
    }

    switch (addr) {
    case 0x010: /* DISPC_SYSCONFIG */
        if (value & 2)                      /* SOFTRESET */
            omap_dss_reset(s);
        s->dispc.idlemode = value & 0x301b;
        break;

    case 0x018: /* DISPC_IRQSTATUS */
        s->dispc.irqst &= ~value;
        omap_dispc_interrupt_update(s);
        break;

    case 0x01c: /* DISPC_IRQENABLE */
        s->dispc.irqen = value & 0xffff;
        omap_dispc_interrupt_update(s);
        break;

    case 0x040: /* DISPC_CONTROL */
        s->dispc.control = value & 0x07ff9fff;
        s->dig.enable = (value >> 1) & 1;
        s->lcd.enable = (value >> 0) & 1;
        if (value & (1 << 12))          /* OVERLAY_OPTIMIZATION */
            if (!((s->dispc.l[1].attr | s->dispc.l[2].attr) & 1)) {
                fprintf(stderr, "%s: Overlay Optimization when no overlay "
                        "region effectively exists leads to "
                        "unpredictable behaviour!\n", __func__);
            }
        if (value & (1 << 6)) {             /* GODIGITAL */
            /* XXX: Shadowed fields are:
             * s->dispc.config
             * s->dispc.capable
             * s->dispc.bg[0]
             * s->dispc.bg[1]
             * s->dispc.trans[0]
             * s->dispc.trans[1]
             * s->dispc.line
             * s->dispc.timing[0]
             * s->dispc.timing[1]
             * s->dispc.timing[2]
             * s->dispc.timing[3]
             * s->lcd.nx
             * s->lcd.ny
             * s->dig.nx
             * s->dig.ny
             * s->dispc.l[0].addr[0]
             * s->dispc.l[0].addr[1]
             * s->dispc.l[0].addr[2]
             * s->dispc.l[0].posx
             * s->dispc.l[0].posy
             * s->dispc.l[0].nx
             * s->dispc.l[0].ny
             * s->dispc.l[0].tresh
             * s->dispc.l[0].rowinc
             * s->dispc.l[0].colinc
             * s->dispc.l[0].wininc
             * All they need to be loaded here from their shadow registers.
             */
        }
        if (value & (1 << 5)) {             /* GOLCD */
             /* XXX: Likewise for LCD here.  */
        }
        s->dispc.invalidate = 1;
        break;

    case 0x044: /* DISPC_CONFIG */
        s->dispc.config = value & 0x3fff;
        /* XXX:
         * bits 2:1 (LOADMODE) reset to 0 after set to 1 and palette loaded
         * bits 2:1 (LOADMODE) reset to 2 after set to 3 and palette loaded
         */
        s->dispc.invalidate = 1;
        break;

    case 0x048: /* DISPC_CAPABLE */
        s->dispc.capable = value & 0x3ff;
        break;

    case 0x04c: /* DISPC_DEFAULT_COLOR0 */
        s->dispc.bg[0] = value & 0xffffff;
        s->dispc.invalidate = 1;
        break;
    case 0x050: /* DISPC_DEFAULT_COLOR1 */
        s->dispc.bg[1] = value & 0xffffff;
        s->dispc.invalidate = 1;
        break;
    case 0x054: /* DISPC_TRANS_COLOR0 */
        s->dispc.trans[0] = value & 0xffffff;
        s->dispc.invalidate = 1;
        break;
    case 0x058: /* DISPC_TRANS_COLOR1 */
        s->dispc.trans[1] = value & 0xffffff;
        s->dispc.invalidate = 1;
        break;

    case 0x060: /* DISPC_LINE_NUMBER */
        s->dispc.line = value & 0x7ff;
        break;

    case 0x064: /* DISPC_TIMING_H */
        s->dispc.timing[0] = value & 0x0ff0ff3f;
        break;
    case 0x068: /* DISPC_TIMING_V */
        s->dispc.timing[1] = value & 0x0ff0ff3f;
        break;
    case 0x06c: /* DISPC_POL_FREQ */
        s->dispc.timing[2] = value & 0x0003ffff;
        break;
    case 0x070: /* DISPC_DIVISOR */
        s->dispc.timing[3] = value & 0x00ff00ff;
        break;

    case 0x078: /* DISPC_SIZE_DIG */
        s->dig.nx = ((value >>  0) & 0x7ff) + 1;        /* PPL */
        s->dig.ny = ((value >> 16) & 0x7ff) + 1;        /* LPP */
        s->dispc.invalidate = 1;
        break;
    case 0x07c: /* DISPC_SIZE_LCD */
        s->lcd.nx = ((value >>  0) & 0x7ff) + 1;        /* PPL */
        s->lcd.ny = ((value >> 16) & 0x7ff) + 1;        /* LPP */
        s->dispc.invalidate = 1;
        break;
    case 0x080: /* DISPC_GFX_BA0 */
        s->dispc.l[0].addr[0] = (hwaddr) value;
        s->dispc.invalidate = 1;
        break;
    case 0x084: /* DISPC_GFX_BA1 */
        s->dispc.l[0].addr[1] = (hwaddr) value;
        s->dispc.invalidate = 1;
        break;
    case 0x088: /* DISPC_GFX_POSITION */
        s->dispc.l[0].posx = ((value >>  0) & 0x7ff);       /* GFXPOSX */
        s->dispc.l[0].posy = ((value >> 16) & 0x7ff);       /* GFXPOSY */
        s->dispc.invalidate = 1;
        break;
    case 0x08c: /* DISPC_GFX_SIZE */
        s->dispc.l[0].nx = ((value >>  0) & 0x7ff) + 1;     /* GFXSIZEX */
        s->dispc.l[0].ny = ((value >> 16) & 0x7ff) + 1;     /* GFXSIZEY */
        s->dispc.invalidate = 1;
        break;
    case 0x0a0: /* DISPC_GFX_ATTRIBUTES */
        s->dispc.l[0].attr = value & 0x7ff;
        if (value & (3 << 9))
            fprintf(stderr, "%s: Big-endian pixel format not supported\n",
                            __func__);
        s->dispc.l[0].enable = value & 1;
        s->dispc.l[0].bpp = (value >> 1) & 0xf;
        s->dispc.invalidate = 1;
        break;
    case 0x0a4: /* DISPC_GFX_FIFO_TRESHOLD */
        s->dispc.l[0].tresh = value & 0x01ff01ff;
        break;
    case 0x0ac: /* DISPC_GFX_ROW_INC */
        s->dispc.l[0].rowinc = value;
        s->dispc.invalidate = 1;
        break;
    case 0x0b0: /* DISPC_GFX_PIXEL_INC */
        s->dispc.l[0].colinc = value;
        s->dispc.invalidate = 1;
        break;
    case 0x0b4: /* DISPC_GFX_WINDOW_SKIP */
        s->dispc.l[0].wininc = value;
        break;
    case 0x0b8: /* DISPC_GFX_TABLE_BA */
        s->dispc.l[0].addr[2] = (hwaddr) value;
        s->dispc.invalidate = 1;
        break;

    case 0x0bc: /* DISPC_VID1_BA0 */
    case 0x0c0: /* DISPC_VID1_BA1 */
    case 0x0c4: /* DISPC_VID1_POSITION */
    case 0x0c8: /* DISPC_VID1_SIZE */
    case 0x0cc: /* DISPC_VID1_ATTRIBUTES */
    case 0x0d0: /* DISPC_VID1_FIFO_TRESHOLD */
    case 0x0d8: /* DISPC_VID1_ROW_INC */
    case 0x0dc: /* DISPC_VID1_PIXEL_INC */
    case 0x0e0: /* DISPC_VID1_FIR */
    case 0x0e4: /* DISPC_VID1_PICTURE_SIZE */
    case 0x0e8: /* DISPC_VID1_ACCU0 */
    case 0x0ec: /* DISPC_VID1_ACCU1 */
    case 0x0f0 ... 0x140:   /* DISPC_VID1_FIR_COEF, DISPC_VID1_CONV_COEF */
    case 0x14c: /* DISPC_VID2_BA0 */
    case 0x150: /* DISPC_VID2_BA1 */
    case 0x154: /* DISPC_VID2_POSITION */
    case 0x158: /* DISPC_VID2_SIZE */
    case 0x15c: /* DISPC_VID2_ATTRIBUTES */
    case 0x160: /* DISPC_VID2_FIFO_TRESHOLD */
    case 0x168: /* DISPC_VID2_ROW_INC */
    case 0x16c: /* DISPC_VID2_PIXEL_INC */
    case 0x170: /* DISPC_VID2_FIR */
    case 0x174: /* DISPC_VID2_PICTURE_SIZE */
    case 0x178: /* DISPC_VID2_ACCU0 */
    case 0x17c: /* DISPC_VID2_ACCU1 */
    case 0x180 ... 0x1d0:   /* DISPC_VID2_FIR_COEF, DISPC_VID2_CONV_COEF */
    case 0x1d4: /* DISPC_DATA_CYCLE1 */
    case 0x1d8: /* DISPC_DATA_CYCLE2 */
    case 0x1dc: /* DISPC_DATA_CYCLE3 */
        break;

    default:
        OMAP_BAD_REG(addr);
    }
}

static const MemoryRegionOps omap_disc_ops = {
    .read = omap_disc_read,
    .write = omap_disc_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static void omap_rfbi_transfer_stop(struct omap_dss_s *s)
{
    if (!s->rfbi.busy)
        return;

    /* TODO: in non-Bypass mode we probably need to just deassert the DRQ.  */

    s->rfbi.busy = 0;
}

static void omap_rfbi_transfer_start(struct omap_dss_s *s)
{
    void *data;
    hwaddr len;
    hwaddr data_addr;
    int pitch;
    static void *bounce_buffer;
    static hwaddr bounce_len;

    if (!s->rfbi.enable || s->rfbi.busy)
        return;

    if (s->rfbi.control & (1 << 1)) {               /* BYPASS */
        /* TODO: in non-Bypass mode we probably need to just assert the
         * DRQ and wait for DMA to write the pixels.  */
        qemu_log_mask(LOG_UNIMP, "%s: Bypass mode unimplemented\n", __func__);
        return;
    }

    if (!(s->dispc.control & (1 << 11)))            /* RFBIMODE */
        return;
    /* TODO: check that LCD output is enabled in DISPC.  */

    s->rfbi.busy = 1;

    len = s->rfbi.pixels * 2;

    data_addr = s->dispc.l[0].addr[0];
    data = cpu_physical_memory_map(data_addr, &len, false);
    if (data && len != s->rfbi.pixels * 2) {
        cpu_physical_memory_unmap(data, len, 0, 0);
        data = NULL;
        len = s->rfbi.pixels * 2;
    }
    if (!data) {
        if (len > bounce_len) {
            bounce_buffer = g_realloc(bounce_buffer, len);
        }
        data = bounce_buffer;
        cpu_physical_memory_read(data_addr, data, len);
    }

    /* TODO bpp */
    s->rfbi.pixels = 0;

    /* TODO: negative values */
    pitch = s->dispc.l[0].nx + (s->dispc.l[0].rowinc - 1) / 2;

    if ((s->rfbi.control & (1 << 2)) && s->rfbi.chip[0])
        s->rfbi.chip[0]->block(s->rfbi.chip[0]->opaque, 1, data, len, pitch);
    if ((s->rfbi.control & (1 << 3)) && s->rfbi.chip[1])
        s->rfbi.chip[1]->block(s->rfbi.chip[1]->opaque, 1, data, len, pitch);

    if (data != bounce_buffer) {
        cpu_physical_memory_unmap(data, len, 0, len);
    }

    omap_rfbi_transfer_stop(s);

    /* TODO */
    s->dispc.irqst |= 1;                    /* FRAMEDONE */
    omap_dispc_interrupt_update(s);
}

static uint64_t omap_rfbi_read(void *opaque, hwaddr addr,
                               unsigned size)
{
    struct omap_dss_s *s = (struct omap_dss_s *) opaque;

    if (size != 4) {
        return omap_badwidth_read32(opaque, addr);
    }

    switch (addr) {
    case 0x00:  /* RFBI_REVISION */
        return 0x10;

    case 0x10:  /* RFBI_SYSCONFIG */
        return s->rfbi.idlemode;

    case 0x14:  /* RFBI_SYSSTATUS */
        return 1 | (s->rfbi.busy << 8);             /* RESETDONE */

    case 0x40:  /* RFBI_CONTROL */
        return s->rfbi.control;

    case 0x44:  /* RFBI_PIXELCNT */
        return s->rfbi.pixels;

    case 0x48:  /* RFBI_LINE_NUMBER */
        return s->rfbi.skiplines;

    case 0x58:  /* RFBI_READ */
    case 0x5c:  /* RFBI_STATUS */
        return s->rfbi.rxbuf;

    case 0x60:  /* RFBI_CONFIG0 */
        return s->rfbi.config[0];
    case 0x64:  /* RFBI_ONOFF_TIME0 */
        return s->rfbi.time[0];
    case 0x68:  /* RFBI_CYCLE_TIME0 */
        return s->rfbi.time[1];
    case 0x6c:  /* RFBI_DATA_CYCLE1_0 */
        return s->rfbi.data[0];
    case 0x70:  /* RFBI_DATA_CYCLE2_0 */
        return s->rfbi.data[1];
    case 0x74:  /* RFBI_DATA_CYCLE3_0 */
        return s->rfbi.data[2];

    case 0x78:  /* RFBI_CONFIG1 */
        return s->rfbi.config[1];
    case 0x7c:  /* RFBI_ONOFF_TIME1 */
        return s->rfbi.time[2];
    case 0x80:  /* RFBI_CYCLE_TIME1 */
        return s->rfbi.time[3];
    case 0x84:  /* RFBI_DATA_CYCLE1_1 */
        return s->rfbi.data[3];
    case 0x88:  /* RFBI_DATA_CYCLE2_1 */
        return s->rfbi.data[4];
    case 0x8c:  /* RFBI_DATA_CYCLE3_1 */
        return s->rfbi.data[5];

    case 0x90:  /* RFBI_VSYNC_WIDTH */
        return s->rfbi.vsync;
    case 0x94:  /* RFBI_HSYNC_WIDTH */
        return s->rfbi.hsync;
    }
    OMAP_BAD_REG(addr);
    return 0;
}

static void omap_rfbi_write(void *opaque, hwaddr addr,
                            uint64_t value, unsigned size)
{
    struct omap_dss_s *s = (struct omap_dss_s *) opaque;

    if (size != 4) {
        omap_badwidth_write32(opaque, addr, value);
        return;
    }

    switch (addr) {
    case 0x10:  /* RFBI_SYSCONFIG */
        if (value & 2)                      /* SOFTRESET */
            omap_rfbi_reset(s);
        s->rfbi.idlemode = value & 0x19;
        break;

    case 0x40:  /* RFBI_CONTROL */
        s->rfbi.control = value & 0xf;
        s->rfbi.enable = value & 1;
        if (value & (1 << 4) &&                 /* ITE */
                        !(s->rfbi.config[0] & s->rfbi.config[1] & 0xc))
            omap_rfbi_transfer_start(s);
        break;

    case 0x44:  /* RFBI_PIXELCNT */
        s->rfbi.pixels = value;
        break;

    case 0x48:  /* RFBI_LINE_NUMBER */
        s->rfbi.skiplines = value & 0x7ff;
        break;

    case 0x4c:  /* RFBI_CMD */
        if ((s->rfbi.control & (1 << 2)) && s->rfbi.chip[0])
            s->rfbi.chip[0]->write(s->rfbi.chip[0]->opaque, 0, value & 0xffff);
        if ((s->rfbi.control & (1 << 3)) && s->rfbi.chip[1])
            s->rfbi.chip[1]->write(s->rfbi.chip[1]->opaque, 0, value & 0xffff);
        break;
    case 0x50:  /* RFBI_PARAM */
        if ((s->rfbi.control & (1 << 2)) && s->rfbi.chip[0])
            s->rfbi.chip[0]->write(s->rfbi.chip[0]->opaque, 1, value & 0xffff);
        if ((s->rfbi.control & (1 << 3)) && s->rfbi.chip[1])
            s->rfbi.chip[1]->write(s->rfbi.chip[1]->opaque, 1, value & 0xffff);
        break;
    case 0x54:  /* RFBI_DATA */
        /* TODO: take into account the format set up in s->rfbi.config[?] and
         * s->rfbi.data[?], but special-case the most usual scenario so that
         * speed doesn't suffer.  */
        if ((s->rfbi.control & (1 << 2)) && s->rfbi.chip[0]) {
            s->rfbi.chip[0]->write(s->rfbi.chip[0]->opaque, 1, value & 0xffff);
            s->rfbi.chip[0]->write(s->rfbi.chip[0]->opaque, 1, value >> 16);
        }
        if ((s->rfbi.control & (1 << 3)) && s->rfbi.chip[1]) {
            s->rfbi.chip[1]->write(s->rfbi.chip[1]->opaque, 1, value & 0xffff);
            s->rfbi.chip[1]->write(s->rfbi.chip[1]->opaque, 1, value >> 16);
        }
        if (!-- s->rfbi.pixels)
            omap_rfbi_transfer_stop(s);
        break;
    case 0x58:  /* RFBI_READ */
        if ((s->rfbi.control & (1 << 2)) && s->rfbi.chip[0])
            s->rfbi.rxbuf = s->rfbi.chip[0]->read(s->rfbi.chip[0]->opaque, 1);
        else if ((s->rfbi.control & (1 << 3)) && s->rfbi.chip[1])
            s->rfbi.rxbuf = s->rfbi.chip[1]->read(s->rfbi.chip[1]->opaque, 1);
        if (!-- s->rfbi.pixels)
            omap_rfbi_transfer_stop(s);
        break;

    case 0x5c:  /* RFBI_STATUS */
        if ((s->rfbi.control & (1 << 2)) && s->rfbi.chip[0])
            s->rfbi.rxbuf = s->rfbi.chip[0]->read(s->rfbi.chip[0]->opaque, 0);
        else if ((s->rfbi.control & (1 << 3)) && s->rfbi.chip[1])
            s->rfbi.rxbuf = s->rfbi.chip[1]->read(s->rfbi.chip[1]->opaque, 0);
        if (!-- s->rfbi.pixels)
            omap_rfbi_transfer_stop(s);
        break;

    case 0x60:  /* RFBI_CONFIG0 */
        s->rfbi.config[0] = value & 0x003f1fff;
        break;

    case 0x64:  /* RFBI_ONOFF_TIME0 */
        s->rfbi.time[0] = value & 0x3fffffff;
        break;
    case 0x68:  /* RFBI_CYCLE_TIME0 */
        s->rfbi.time[1] = value & 0x0fffffff;
        break;
    case 0x6c:  /* RFBI_DATA_CYCLE1_0 */
        s->rfbi.data[0] = value & 0x0f1f0f1f;
        break;
    case 0x70:  /* RFBI_DATA_CYCLE2_0 */
        s->rfbi.data[1] = value & 0x0f1f0f1f;
        break;
    case 0x74:  /* RFBI_DATA_CYCLE3_0 */
        s->rfbi.data[2] = value & 0x0f1f0f1f;
        break;
    case 0x78:  /* RFBI_CONFIG1 */
        s->rfbi.config[1] = value & 0x003f1fff;
        break;

    case 0x7c:  /* RFBI_ONOFF_TIME1 */
        s->rfbi.time[2] = value & 0x3fffffff;
        break;
    case 0x80:  /* RFBI_CYCLE_TIME1 */
        s->rfbi.time[3] = value & 0x0fffffff;
        break;
    case 0x84:  /* RFBI_DATA_CYCLE1_1 */
        s->rfbi.data[3] = value & 0x0f1f0f1f;
        break;
    case 0x88:  /* RFBI_DATA_CYCLE2_1 */
        s->rfbi.data[4] = value & 0x0f1f0f1f;
        break;
    case 0x8c:  /* RFBI_DATA_CYCLE3_1 */
        s->rfbi.data[5] = value & 0x0f1f0f1f;
        break;

    case 0x90:  /* RFBI_VSYNC_WIDTH */
        s->rfbi.vsync = value & 0xffff;
        break;
    case 0x94:  /* RFBI_HSYNC_WIDTH */
        s->rfbi.hsync = value & 0xffff;
        break;

    default:
        OMAP_BAD_REG(addr);
    }
}

static const MemoryRegionOps omap_rfbi_ops = {
    .read = omap_rfbi_read,
    .write = omap_rfbi_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static uint64_t omap_venc_read(void *opaque, hwaddr addr,
                               unsigned size)
{
    if (size != 4) {
        return omap_badwidth_read32(opaque, addr);
    }

    switch (addr) {
    case 0x00:  /* REV_ID */
    case 0x04:  /* STATUS */
    case 0x08:  /* F_CONTROL */
    case 0x10:  /* VIDOUT_CTRL */
    case 0x14:  /* SYNC_CTRL */
    case 0x1c:  /* LLEN */
    case 0x20:  /* FLENS */
    case 0x24:  /* HFLTR_CTRL */
    case 0x28:  /* CC_CARR_WSS_CARR */
    case 0x2c:  /* C_PHASE */
    case 0x30:  /* GAIN_U */
    case 0x34:  /* GAIN_V */
    case 0x38:  /* GAIN_Y */
    case 0x3c:  /* BLACK_LEVEL */
    case 0x40:  /* BLANK_LEVEL */
    case 0x44:  /* X_COLOR */
    case 0x48:  /* M_CONTROL */
    case 0x4c:  /* BSTAMP_WSS_DATA */
    case 0x50:  /* S_CARR */
    case 0x54:  /* LINE21 */
    case 0x58:  /* LN_SEL */
    case 0x5c:  /* L21__WC_CTL */
    case 0x60:  /* HTRIGGER_VTRIGGER */
    case 0x64:  /* SAVID__EAVID */
    case 0x68:  /* FLEN__FAL */
    case 0x6c:  /* LAL__PHASE_RESET */
    case 0x70:  /* HS_INT_START_STOP_X */
    case 0x74:  /* HS_EXT_START_STOP_X */
    case 0x78:  /* VS_INT_START_X */
    case 0x7c:  /* VS_INT_STOP_X__VS_INT_START_Y */
    case 0x80:  /* VS_INT_STOP_Y__VS_INT_START_X */
    case 0x84:  /* VS_EXT_STOP_X__VS_EXT_START_Y */
    case 0x88:  /* VS_EXT_STOP_Y */
    case 0x90:  /* AVID_START_STOP_X */
    case 0x94:  /* AVID_START_STOP_Y */
    case 0xa0:  /* FID_INT_START_X__FID_INT_START_Y */
    case 0xa4:  /* FID_INT_OFFSET_Y__FID_EXT_START_X */
    case 0xa8:  /* FID_EXT_START_Y__FID_EXT_OFFSET_Y */
    case 0xb0:  /* TVDETGP_INT_START_STOP_X */
    case 0xb4:  /* TVDETGP_INT_START_STOP_Y */
    case 0xb8:  /* GEN_CTRL */
    case 0xc4:  /* DAC_TST__DAC_A */
    case 0xc8:  /* DAC_B__DAC_C */
        return 0;

    default:
        break;
    }
    OMAP_BAD_REG(addr);
    return 0;
}

static void omap_venc_write(void *opaque, hwaddr addr,
                            uint64_t value, unsigned size)
{
    if (size != 4) {
        omap_badwidth_write32(opaque, addr, size);
        return;
    }

    switch (addr) {
    case 0x08:  /* F_CONTROL */
    case 0x10:  /* VIDOUT_CTRL */
    case 0x14:  /* SYNC_CTRL */
    case 0x1c:  /* LLEN */
    case 0x20:  /* FLENS */
    case 0x24:  /* HFLTR_CTRL */
    case 0x28:  /* CC_CARR_WSS_CARR */
    case 0x2c:  /* C_PHASE */
    case 0x30:  /* GAIN_U */
    case 0x34:  /* GAIN_V */
    case 0x38:  /* GAIN_Y */
    case 0x3c:  /* BLACK_LEVEL */
    case 0x40:  /* BLANK_LEVEL */
    case 0x44:  /* X_COLOR */
    case 0x48:  /* M_CONTROL */
    case 0x4c:  /* BSTAMP_WSS_DATA */
    case 0x50:  /* S_CARR */
    case 0x54:  /* LINE21 */
    case 0x58:  /* LN_SEL */
    case 0x5c:  /* L21__WC_CTL */
    case 0x60:  /* HTRIGGER_VTRIGGER */
    case 0x64:  /* SAVID__EAVID */
    case 0x68:  /* FLEN__FAL */
    case 0x6c:  /* LAL__PHASE_RESET */
    case 0x70:  /* HS_INT_START_STOP_X */
    case 0x74:  /* HS_EXT_START_STOP_X */
    case 0x78:  /* VS_INT_START_X */
    case 0x7c:  /* VS_INT_STOP_X__VS_INT_START_Y */
    case 0x80:  /* VS_INT_STOP_Y__VS_INT_START_X */
    case 0x84:  /* VS_EXT_STOP_X__VS_EXT_START_Y */
    case 0x88:  /* VS_EXT_STOP_Y */
    case 0x90:  /* AVID_START_STOP_X */
    case 0x94:  /* AVID_START_STOP_Y */
    case 0xa0:  /* FID_INT_START_X__FID_INT_START_Y */
    case 0xa4:  /* FID_INT_OFFSET_Y__FID_EXT_START_X */
    case 0xa8:  /* FID_EXT_START_Y__FID_EXT_OFFSET_Y */
    case 0xb0:  /* TVDETGP_INT_START_STOP_X */
    case 0xb4:  /* TVDETGP_INT_START_STOP_Y */
    case 0xb8:  /* GEN_CTRL */
    case 0xc4:  /* DAC_TST__DAC_A */
    case 0xc8:  /* DAC_B__DAC_C */
        break;

    default:
        OMAP_BAD_REG(addr);
    }
}

static const MemoryRegionOps omap_venc_ops = {
    .read = omap_venc_read,
    .write = omap_venc_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static uint64_t omap_im3_read(void *opaque, hwaddr addr,
                              unsigned size)
{
    if (size != 4) {
        return omap_badwidth_read32(opaque, addr);
    }

    switch (addr) {
    case 0x0a8: /* SBIMERRLOGA */
    case 0x0b0: /* SBIMERRLOG */
    case 0x190: /* SBIMSTATE */
    case 0x198: /* SBTMSTATE_L */
    case 0x19c: /* SBTMSTATE_H */
    case 0x1a8: /* SBIMCONFIG_L */
    case 0x1ac: /* SBIMCONFIG_H */
    case 0x1f8: /* SBID_L */
    case 0x1fc: /* SBID_H */
        return 0;

    default:
        break;
    }
    OMAP_BAD_REG(addr);
    return 0;
}

static void omap_im3_write(void *opaque, hwaddr addr,
                           uint64_t value, unsigned size)
{
    if (size != 4) {
        omap_badwidth_write32(opaque, addr, value);
        return;
    }

    switch (addr) {
    case 0x0b0: /* SBIMERRLOG */
    case 0x190: /* SBIMSTATE */
    case 0x198: /* SBTMSTATE_L */
    case 0x19c: /* SBTMSTATE_H */
    case 0x1a8: /* SBIMCONFIG_L */
    case 0x1ac: /* SBIMCONFIG_H */
        break;

    default:
        OMAP_BAD_REG(addr);
    }
}

static const MemoryRegionOps omap_im3_ops = {
    .read = omap_im3_read,
    .write = omap_im3_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

struct omap_dss_s *omap_dss_init(struct omap_target_agent_s *ta,
                MemoryRegion *sysmem,
                hwaddr l3_base,
                qemu_irq irq, qemu_irq drq,
                omap_clk fck1, omap_clk fck2, omap_clk ck54m,
                omap_clk ick1, omap_clk ick2)
{
    struct omap_dss_s *s = g_new0(struct omap_dss_s, 1);

    s->irq = irq;
    s->drq = drq;
    omap_dss_reset(s);

    memory_region_init_io(&s->iomem_diss1, NULL, &omap_diss_ops, s, "omap.diss1",
                          omap_l4_region_size(ta, 0));
    memory_region_init_io(&s->iomem_disc1, NULL, &omap_disc_ops, s, "omap.disc1",
                          omap_l4_region_size(ta, 1));
    memory_region_init_io(&s->iomem_rfbi1, NULL, &omap_rfbi_ops, s, "omap.rfbi1",
                          omap_l4_region_size(ta, 2));
    memory_region_init_io(&s->iomem_venc1, NULL, &omap_venc_ops, s, "omap.venc1",
                          omap_l4_region_size(ta, 3));
    memory_region_init_io(&s->iomem_im3, NULL, &omap_im3_ops, s,
                          "omap.im3", 0x1000);

    omap_l4_attach(ta, 0, &s->iomem_diss1);
    omap_l4_attach(ta, 1, &s->iomem_disc1);
    omap_l4_attach(ta, 2, &s->iomem_rfbi1);
    omap_l4_attach(ta, 3, &s->iomem_venc1);
    memory_region_add_subregion(sysmem, l3_base, &s->iomem_im3);

#if 0
    s->state = graphic_console_init(omap_update_display,
                                    omap_invalidate_display, omap_screen_dump, s);
#endif

    return s;
}

void omap_rfbi_attach(struct omap_dss_s *s, int cs, struct rfbi_chip_s *chip)
{
    if (cs < 0 || cs > 1)
        hw_error("%s: wrong CS %i\n", __func__, cs);
    s->rfbi.chip[cs] = chip;
}