// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Zoran zr36057/zr36067 PCI controller driver, for the
 * Pinnacle/Miro DC10/DC10+/DC30/DC30+, Iomega Buz, Linux
 * Media Labs LML33/LML33R10.
 *
 * This part handles device access (PCI/I2C/codec/...)
 *
 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/module.h>

#include <linux/interrupt.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/spinlock.h>

#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/wait.h>
#include <linux/dma-mapping.h>

#include <linux/io.h>

#include "videocodec.h"
#include "zoran.h"
#include "zoran_device.h"
#include "zoran_card.h"

#define IRQ_MASK (ZR36057_ISR_GIRQ0 | \
                  ZR36057_ISR_GIRQ1 | \
                  ZR36057_ISR_JPEG_REP_IRQ)

static bool lml33dpath;         /* default = 0
                                 * 1 will use digital path in capture
                                 * mode instead of analog. It can be
                                 * used for picture adjustments using
                                 * tool like xawtv while watching image
                                 * on TV monitor connected to the output.
                                 * However, due to absence of 75 Ohm
                                 * load on Bt819 input, there will be
                                 * some image imperfections
                                 */

module_param(lml33dpath, bool, 0644);
MODULE_PARM_DESC(lml33dpath, "Use digital path capture mode (on LML33 cards)");

int zr_set_buf(struct zoran *zr);
/*
 * initialize video front end
 */
static void zr36057_init_vfe(struct zoran *zr)
{
        u32 reg;

        reg = btread(ZR36057_VFESPFR);
        reg |= ZR36057_VFESPFR_LITTLE_ENDIAN;
        reg &= ~ZR36057_VFESPFR_VCLK_POL;
        reg |= ZR36057_VFESPFR_EXT_FL;
        reg |= ZR36057_VFESPFR_TOP_FIELD;
        btwrite(reg, ZR36057_VFESPFR);
        reg = btread(ZR36057_VDCR);
        if (pci_pci_problems & PCIPCI_TRITON)
                // || zr->revision < 1) // Revision 1 has also Triton support
                reg &= ~ZR36057_VDCR_TRITON;
        else
                reg |= ZR36057_VDCR_TRITON;
        btwrite(reg, ZR36057_VDCR);
}

/*
 * General Purpose I/O and Guest bus access
 */

/*
 * This is a bit tricky. When a board lacks a GPIO function, the corresponding
 * GPIO bit number in the card_info structure is set to 0.
 */

void GPIO(struct zoran *zr, int bit, unsigned int value)
{
        u32 reg;
        u32 mask;

        /* Make sure the bit number is legal
         * A bit number of -1 (lacking) gives a mask of 0,
         * making it harmless
         */
        mask = (1 << (24 + bit)) & 0xff000000;
        reg = btread(ZR36057_GPPGCR1) & ~mask;
        if (value)
                reg |= mask;

        btwrite(reg, ZR36057_GPPGCR1);
        udelay(1);
}

/*
 * Wait til post office is no longer busy
 */

int post_office_wait(struct zoran *zr)
{
        u32 por;

//      while (((por = btread(ZR36057_POR)) & (ZR36057_POR_PO_PEN | ZR36057_POR_PO_TIME)) == ZR36057_POR_PO_PEN) {
        while ((por = btread(ZR36057_POR)) & ZR36057_POR_PO_PEN) {
                /* wait for something to happen */
                /* TODO add timeout */
        }
        if ((por & ZR36057_POR_PO_TIME) && !zr->card.gws_not_connected) {
                /* In LML33/BUZ \GWS line is not connected, so it has always timeout set */
                pci_info(zr->pci_dev, "pop timeout %08x\n", por);
                return -1;
        }

        return 0;
}

int post_office_write(struct zoran *zr, unsigned int guest,
                      unsigned int reg, unsigned int value)
{
        u32 por;

        por =
            ZR36057_POR_PO_DIR | ZR36057_POR_PO_TIME | ((guest & 7) << 20) |
            ((reg & 7) << 16) | (value & 0xFF);
        btwrite(por, ZR36057_POR);

        return post_office_wait(zr);
}

int post_office_read(struct zoran *zr, unsigned int guest, unsigned int reg)
{
        u32 por;

        por = ZR36057_POR_PO_TIME | ((guest & 7) << 20) | ((reg & 7) << 16);
        btwrite(por, ZR36057_POR);
        if (post_office_wait(zr) < 0)
                return -1;

        return btread(ZR36057_POR) & 0xFF;
}

/*
 * JPEG Codec access
 */

void jpeg_codec_sleep(struct zoran *zr, int sleep)
{
        GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_SLEEP], !sleep);
        if (!sleep) {
                pci_dbg(zr->pci_dev, "%s() - wake GPIO=0x%08x\n", __func__, btread(ZR36057_GPPGCR1));
                udelay(500);
        } else {
                pci_dbg(zr->pci_dev, "%s() - sleep GPIO=0x%08x\n", __func__, btread(ZR36057_GPPGCR1));
                udelay(2);
        }
}

int jpeg_codec_reset(struct zoran *zr)
{
        /* Take the codec out of sleep */
        jpeg_codec_sleep(zr, 0);

        if (zr->card.gpcs[GPCS_JPEG_RESET] != 0xff) {
                post_office_write(zr, zr->card.gpcs[GPCS_JPEG_RESET], 0,
                                  0);
                udelay(2);
        } else {
                GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_RESET], 0);
                udelay(2);
                GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_RESET], 1);
                udelay(2);
        }

        return 0;
}

/*
 *   Set the registers for the size we have specified. Don't bother
 *   trying to understand this without the ZR36057 manual in front of
 *   you [AC].
 */
static void zr36057_adjust_vfe(struct zoran *zr, enum zoran_codec_mode mode)
{
        u32 reg;

        switch (mode) {
        case BUZ_MODE_MOTION_DECOMPRESS:
                btand(~ZR36057_VFESPFR_EXT_FL, ZR36057_VFESPFR);
                reg = btread(ZR36057_VFEHCR);
                if ((reg & (1 << 10)) && zr->card.type != LML33R10)
                        reg += ((1 << 10) | 1);

                btwrite(reg, ZR36057_VFEHCR);
                break;
        case BUZ_MODE_MOTION_COMPRESS:
        case BUZ_MODE_IDLE:
        default:
                if ((zr->norm & V4L2_STD_NTSC) ||
                    (zr->card.type == LML33R10 &&
                     (zr->norm & V4L2_STD_PAL)))
                        btand(~ZR36057_VFESPFR_EXT_FL, ZR36057_VFESPFR);
                else
                        btor(ZR36057_VFESPFR_EXT_FL, ZR36057_VFESPFR);
                reg = btread(ZR36057_VFEHCR);
                if (!(reg & (1 << 10)) && zr->card.type != LML33R10)
                        reg -= ((1 << 10) | 1);

                btwrite(reg, ZR36057_VFEHCR);
                break;
        }
}

/*
 * set geometry
 */

static void zr36057_set_vfe(struct zoran *zr, int video_width, int video_height,
                            const struct zoran_format *format)
{
        const struct tvnorm *tvn;
        unsigned int h_start, h_end, v_start, v_end;
        unsigned int disp_mode;
        unsigned int vid_win_wid, vid_win_ht;
        unsigned int hcrop1, hcrop2, vcrop1, vcrop2;
        unsigned int wa, we, ha, he;
        unsigned int X, Y, hor_dcm, ver_dcm;
        u32 reg;

        tvn = zr->timing;

        wa = tvn->wa;
        ha = tvn->ha;

        pci_info(zr->pci_dev, "set_vfe() - width = %d, height = %d\n", video_width, video_height);

        if (video_width < BUZ_MIN_WIDTH ||
            video_height < BUZ_MIN_HEIGHT ||
            video_width > wa || video_height > ha) {
                pci_err(zr->pci_dev, "set_vfe: w=%d h=%d not valid\n", video_width, video_height);
                return;
        }

        /**** zr36057 ****/

        /* horizontal */
        vid_win_wid = video_width;
        X = DIV_ROUND_UP(vid_win_wid * 64, tvn->wa);
        we = (vid_win_wid * 64) / X;
        hor_dcm = 64 - X;
        hcrop1 = 2 * ((tvn->wa - we) / 4);
        hcrop2 = tvn->wa - we - hcrop1;
        h_start = tvn->h_start ? tvn->h_start : 1;
        /* (Ronald) Original comment:
         * "| 1 Doesn't have any effect, tested on both a DC10 and a DC10+"
         * this is false. It inverses chroma values on the LML33R10 (so Cr
         * suddenly is shown as Cb and reverse, really cool effect if you
         * want to see blue faces, not useful otherwise). So don't use |1.
         * However, the DC10 has '0' as h_start, but does need |1, so we
         * use a dirty check...
         */
        h_end = h_start + tvn->wa - 1;
        h_start += hcrop1;
        h_end -= hcrop2;
        reg = ((h_start & ZR36057_VFEHCR_HMASK) << ZR36057_VFEHCR_H_START)
            | ((h_end & ZR36057_VFEHCR_HMASK) << ZR36057_VFEHCR_H_END);
        if (zr->card.vfe_pol.hsync_pol)
                reg |= ZR36057_VFEHCR_HS_POL;
        btwrite(reg, ZR36057_VFEHCR);

        /* Vertical */
        disp_mode = !(video_height > BUZ_MAX_HEIGHT / 2);
        vid_win_ht = disp_mode ? video_height : video_height / 2;
        Y = DIV_ROUND_UP(vid_win_ht * 64 * 2, tvn->ha);
        he = (vid_win_ht * 64) / Y;
        ver_dcm = 64 - Y;
        vcrop1 = (tvn->ha / 2 - he) / 2;
        vcrop2 = tvn->ha / 2 - he - vcrop1;
        v_start = tvn->v_start;
        v_end = v_start + tvn->ha / 2;  // - 1; FIXME SnapShot times out with -1 in 768*576 on the DC10 - LP
        v_start += vcrop1;
        v_end -= vcrop2;
        reg = ((v_start & ZR36057_VFEVCR_VMASK) << ZR36057_VFEVCR_V_START)
            | ((v_end & ZR36057_VFEVCR_VMASK) << ZR36057_VFEVCR_V_END);
        if (zr->card.vfe_pol.vsync_pol)
                reg |= ZR36057_VFEVCR_VS_POL;
        btwrite(reg, ZR36057_VFEVCR);

        /* scaler and pixel format */
        reg = 0;
        reg |= (hor_dcm << ZR36057_VFESPFR_HOR_DCM);
        reg |= (ver_dcm << ZR36057_VFESPFR_VER_DCM);
        reg |= (disp_mode << ZR36057_VFESPFR_DISP_MODE);
        /* RJ: I don't know, why the following has to be the opposite
         * of the corresponding ZR36060 setting, but only this way
         * we get the correct colors when uncompressing to the screen  */
        //reg |= ZR36057_VFESPFR_VCLK_POL; /**/
        /* RJ: Don't know if that is needed for NTSC also */
        if (!(zr->norm & V4L2_STD_NTSC))
                reg |= ZR36057_VFESPFR_EXT_FL;  // NEEDED!!!!!!! Wolfgang
        reg |= ZR36057_VFESPFR_TOP_FIELD;
        if (hor_dcm >= 48)
                reg |= 3 << ZR36057_VFESPFR_H_FILTER;   /* 5 tap filter */
        else if (hor_dcm >= 32)
                reg |= 2 << ZR36057_VFESPFR_H_FILTER;   /* 4 tap filter */
        else if (hor_dcm >= 16)
                reg |= 1 << ZR36057_VFESPFR_H_FILTER;   /* 3 tap filter */

        reg |= format->vfespfr;
        btwrite(reg, ZR36057_VFESPFR);

        /* display configuration */
        reg = (16 << ZR36057_VDCR_MIN_PIX)
            | (vid_win_ht << ZR36057_VDCR_VID_WIN_HT)
            | (vid_win_wid << ZR36057_VDCR_VID_WIN_WID);
        if (pci_pci_problems & PCIPCI_TRITON)
                // || zr->revision < 1) // Revision 1 has also Triton support
                reg &= ~ZR36057_VDCR_TRITON;
        else
                reg |= ZR36057_VDCR_TRITON;
        btwrite(reg, ZR36057_VDCR);

        zr36057_adjust_vfe(zr, zr->codec_mode);
}

/* Enable/Disable uncompressed memory grabbing of the 36057 */
void zr36057_set_memgrab(struct zoran *zr, int mode)
{
        if (mode) {
                /* We only check SnapShot and not FrameGrab here.  SnapShot==1
                 * means a capture is already in progress, but FrameGrab==1
                 * doesn't necessary mean that.  It's more correct to say a 1
                 * to 0 transition indicates a capture completed.  If a
                 * capture is pending when capturing is tuned off, FrameGrab
                 * will be stuck at 1 until capturing is turned back on.
                 */
                if (btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_SNAP_SHOT)
                        pci_warn(zr->pci_dev, "zr36057_set_memgrab(1) with SnapShot on!?\n");

                /* switch on VSync interrupts */
                btwrite(IRQ_MASK, ZR36057_ISR); // Clear Interrupts
                btor(zr->card.vsync_int, ZR36057_ICR);  // SW

                /* enable SnapShot */
                btor(ZR36057_VSSFGR_SNAP_SHOT, ZR36057_VSSFGR);

                /* Set zr36057 video front end  and enable video */
                zr36057_set_vfe(zr, zr->v4l_settings.width,
                                zr->v4l_settings.height,
                                zr->v4l_settings.format);
        } else {
                /* switch off VSync interrupts */
                btand(~zr->card.vsync_int, ZR36057_ICR);        // SW

                /* re-enable grabbing to screen if it was running */
                btand(~ZR36057_VDCR_VID_EN, ZR36057_VDCR);
                btand(~ZR36057_VSSFGR_SNAP_SHOT, ZR36057_VSSFGR);
        }
}

/*****************************************************************************
 *                                                                           *
 *  Set up the Buz-specific MJPEG part                                       *
 *                                                                           *
 *****************************************************************************/

static inline void set_frame(struct zoran *zr, int val)
{
        GPIO(zr, zr->card.gpio[ZR_GPIO_JPEG_FRAME], val);
}

static void set_videobus_dir(struct zoran *zr, int val)
{
        switch (zr->card.type) {
        case LML33:
        case LML33R10:
                if (!lml33dpath)
                        GPIO(zr, 5, val);
                else
                        GPIO(zr, 5, 1);
                break;
        default:
                GPIO(zr, zr->card.gpio[ZR_GPIO_VID_DIR],
                     zr->card.gpio_pol[ZR_GPIO_VID_DIR] ? !val : val);
                break;
        }
}

static void init_jpeg_queue(struct zoran *zr)
{
        int i;

        /* re-initialize DMA ring stuff */
        zr->jpg_que_head = 0;
        zr->jpg_dma_head = 0;
        zr->jpg_dma_tail = 0;
        zr->jpg_que_tail = 0;
        zr->jpg_seq_num = 0;
        zr->jpeg_error = 0;
        zr->num_errors = 0;
        zr->jpg_err_seq = 0;
        zr->jpg_err_shift = 0;
        zr->jpg_queued_num = 0;
        for (i = 0; i < BUZ_NUM_STAT_COM; i++)
                zr->stat_com[i] = cpu_to_le32(1);       /* mark as unavailable to zr36057 */
}

static void zr36057_set_jpg(struct zoran *zr, enum zoran_codec_mode mode)
{
        const struct tvnorm *tvn;
        u32 reg;

        tvn = zr->timing;

        /* assert P_Reset, disable code transfer, deassert Active */
        btwrite(0, ZR36057_JPC);

        /* MJPEG compression mode */
        switch (mode) {
        case BUZ_MODE_MOTION_COMPRESS:
        default:
                reg = ZR36057_JMC_MJPG_CMP_MODE;
                break;

        case BUZ_MODE_MOTION_DECOMPRESS:
                reg = ZR36057_JMC_MJPG_EXP_MODE;
                reg |= ZR36057_JMC_SYNC_MSTR;
                /* RJ: The following is experimental - improves the output to screen */
                //if(zr->jpg_settings.VFIFO_FB) reg |= ZR36057_JMC_VFIFO_FB; // No, it doesn't. SM
                break;

        case BUZ_MODE_STILL_COMPRESS:
                reg = ZR36057_JMC_JPG_CMP_MODE;
                break;

        case BUZ_MODE_STILL_DECOMPRESS:
                reg = ZR36057_JMC_JPG_EXP_MODE;
                break;
        }
        reg |= ZR36057_JMC_JPG;
        if (zr->jpg_settings.field_per_buff == 1)
                reg |= ZR36057_JMC_FLD_PER_BUFF;
        btwrite(reg, ZR36057_JMC);

        /* vertical */
        btor(ZR36057_VFEVCR_VS_POL, ZR36057_VFEVCR);
        reg = (6 << ZR36057_VSP_VSYNC_SIZE) |
              (tvn->ht << ZR36057_VSP_FRM_TOT);
        btwrite(reg, ZR36057_VSP);
        reg = ((zr->jpg_settings.img_y + tvn->v_start) << ZR36057_FVAP_NAY) |
              (zr->jpg_settings.img_height << ZR36057_FVAP_PAY);
        btwrite(reg, ZR36057_FVAP);

        /* horizontal */
        if (zr->card.vfe_pol.hsync_pol)
                btor(ZR36057_VFEHCR_HS_POL, ZR36057_VFEHCR);
        else
                btand(~ZR36057_VFEHCR_HS_POL, ZR36057_VFEHCR);
        reg = ((tvn->h_sync_start) << ZR36057_HSP_HSYNC_START) |
              (tvn->wt << ZR36057_HSP_LINE_TOT);
        btwrite(reg, ZR36057_HSP);
        reg = ((zr->jpg_settings.img_x +
                tvn->h_start + 4) << ZR36057_FHAP_NAX) |
              (zr->jpg_settings.img_width << ZR36057_FHAP_PAX);
        btwrite(reg, ZR36057_FHAP);

        /* field process parameters */
        if (zr->jpg_settings.odd_even)
                reg = ZR36057_FPP_ODD_EVEN;
        else
                reg = 0;

        btwrite(reg, ZR36057_FPP);

        /* Set proper VCLK Polarity, else colors will be wrong during playback */
        //btor(ZR36057_VFESPFR_VCLK_POL, ZR36057_VFESPFR);

        /* code base address */
        btwrite(zr->p_sc, ZR36057_JCBA);

        /* FIFO threshold (FIFO is 160. double words) */
        /* NOTE: decimal values here */
        switch (mode) {
        case BUZ_MODE_STILL_COMPRESS:
        case BUZ_MODE_MOTION_COMPRESS:
                if (zr->card.type != BUZ)
                        reg = 140;
                else
                        reg = 60;
                break;

        case BUZ_MODE_STILL_DECOMPRESS:
        case BUZ_MODE_MOTION_DECOMPRESS:
                reg = 20;
                break;

        default:
                reg = 80;
                break;
        }
        btwrite(reg, ZR36057_JCFT);
        zr36057_adjust_vfe(zr, mode);
}

void clear_interrupt_counters(struct zoran *zr)
{
        zr->intr_counter_GIRQ1 = 0;
        zr->intr_counter_GIRQ0 = 0;
        zr->intr_counter_cod_rep_irq = 0;
        zr->intr_counter_jpeg_rep_irq = 0;
        zr->field_counter = 0;
        zr->irq1_in = 0;
        zr->irq1_out = 0;
        zr->jpeg_in = 0;
        zr->jpeg_out = 0;
        zr->JPEG_0 = 0;
        zr->JPEG_1 = 0;
        zr->end_event_missed = 0;
        zr->jpeg_missed = 0;
        zr->jpeg_max_missed = 0;
        zr->jpeg_min_missed = 0x7fffffff;
}

static u32 count_reset_interrupt(struct zoran *zr)
{
        u32 isr;

        isr = btread(ZR36057_ISR) & 0x78000000;
        if (isr) {
                if (isr & ZR36057_ISR_GIRQ1) {
                        btwrite(ZR36057_ISR_GIRQ1, ZR36057_ISR);
                        zr->intr_counter_GIRQ1++;
                }
                if (isr & ZR36057_ISR_GIRQ0) {
                        btwrite(ZR36057_ISR_GIRQ0, ZR36057_ISR);
                        zr->intr_counter_GIRQ0++;
                }
                if (isr & ZR36057_ISR_COD_REP_IRQ) {
                        btwrite(ZR36057_ISR_COD_REP_IRQ, ZR36057_ISR);
                        zr->intr_counter_cod_rep_irq++;
                }
                if (isr & ZR36057_ISR_JPEG_REP_IRQ) {
                        btwrite(ZR36057_ISR_JPEG_REP_IRQ, ZR36057_ISR);
                        zr->intr_counter_jpeg_rep_irq++;
                }
        }
        return isr;
}

void jpeg_start(struct zoran *zr)
{
        int reg;

        zr->frame_num = 0;

        /* deassert P_reset, disable code transfer, deassert Active */
        btwrite(ZR36057_JPC_P_RESET, ZR36057_JPC);
        /* stop flushing the internal code buffer */
        btand(~ZR36057_MCTCR_C_FLUSH, ZR36057_MCTCR);
        /* enable code transfer */
        btor(ZR36057_JPC_COD_TRNS_EN, ZR36057_JPC);

        /* clear IRQs */
        btwrite(IRQ_MASK, ZR36057_ISR);
        /* enable the JPEG IRQs */
        btwrite(zr->card.jpeg_int | ZR36057_ICR_JPEG_REP_IRQ | ZR36057_ICR_INT_PIN_EN,
                ZR36057_ICR);

        set_frame(zr, 0);       // \FRAME

        /* set the JPEG codec guest ID */
        reg = (zr->card.gpcs[1] << ZR36057_JCGI_JPE_GUEST_ID) |
               (0 << ZR36057_JCGI_JPE_GUEST_REG);
        btwrite(reg, ZR36057_JCGI);

        if (zr->card.video_vfe == CODEC_TYPE_ZR36016 &&
            zr->card.video_codec == CODEC_TYPE_ZR36050) {
                /* Enable processing on the ZR36016 */
                if (zr->vfe)
                        zr36016_write(zr->vfe, 0, 1);

                /* load the address of the GO register in the ZR36050 latch */
                post_office_write(zr, 0, 0, 0);
        }

        /* assert Active */
        btor(ZR36057_JPC_ACTIVE, ZR36057_JPC);

        /* enable the Go generation */
        btor(ZR36057_JMC_GO_EN, ZR36057_JMC);
        udelay(30);

        set_frame(zr, 1);       // /FRAME

        pci_dbg(zr->pci_dev, "jpeg_start\n");
}

void zr36057_enable_jpg(struct zoran *zr, enum zoran_codec_mode mode)
{
        struct vfe_settings cap;
        int field_size = zr->buffer_size / zr->jpg_settings.field_per_buff;

        zr->codec_mode = mode;

        cap.x = zr->jpg_settings.img_x;
        cap.y = zr->jpg_settings.img_y;
        cap.width = zr->jpg_settings.img_width;
        cap.height = zr->jpg_settings.img_height;
        cap.decimation =
            zr->jpg_settings.hor_dcm | (zr->jpg_settings.ver_dcm << 8);
        cap.quality = zr->jpg_settings.jpg_comp.quality;

        switch (mode) {
        case BUZ_MODE_MOTION_COMPRESS: {
                struct jpeg_app_marker app;
                struct jpeg_com_marker com;

                /* In motion compress mode, the decoder output must be enabled, and
                 * the video bus direction set to input.
                 */
                set_videobus_dir(zr, 0);
                decoder_call(zr, video, s_stream, 1);
                encoder_call(zr, video, s_routing, 0, 0, 0);

                /* Take the JPEG codec and the VFE out of sleep */
                jpeg_codec_sleep(zr, 0);

                /* set JPEG app/com marker */
                app.appn = zr->jpg_settings.jpg_comp.APPn;
                app.len = zr->jpg_settings.jpg_comp.APP_len;
                memcpy(app.data, zr->jpg_settings.jpg_comp.APP_data, 60);
                zr->codec->control(zr->codec, CODEC_S_JPEG_APP_DATA,
                                   sizeof(struct jpeg_app_marker), &app);

                com.len = zr->jpg_settings.jpg_comp.COM_len;
                memcpy(com.data, zr->jpg_settings.jpg_comp.COM_data, 60);
                zr->codec->control(zr->codec, CODEC_S_JPEG_COM_DATA,
                                   sizeof(struct jpeg_com_marker), &com);

                /* Setup the JPEG codec */
                zr->codec->control(zr->codec, CODEC_S_JPEG_TDS_BYTE,
                                   sizeof(int), &field_size);
                zr->codec->set_video(zr->codec, zr->timing, &cap,
                                     &zr->card.vfe_pol);
                zr->codec->set_mode(zr->codec, CODEC_DO_COMPRESSION);

                /* Setup the VFE */
                if (zr->vfe) {
                        zr->vfe->control(zr->vfe, CODEC_S_JPEG_TDS_BYTE,
                                         sizeof(int), &field_size);
                        zr->vfe->set_video(zr->vfe, zr->timing, &cap,
                                           &zr->card.vfe_pol);
                        zr->vfe->set_mode(zr->vfe, CODEC_DO_COMPRESSION);
                }

                init_jpeg_queue(zr);
                zr36057_set_jpg(zr, mode);      // \P_Reset, ... Video param, FIFO

                clear_interrupt_counters(zr);
                pci_info(zr->pci_dev, "enable_jpg(MOTION_COMPRESS)\n");
                break;
        }

        case BUZ_MODE_MOTION_DECOMPRESS:
                /* In motion decompression mode, the decoder output must be disabled, and
                 * the video bus direction set to output.
                 */
                decoder_call(zr, video, s_stream, 0);
                set_videobus_dir(zr, 1);
                encoder_call(zr, video, s_routing, 1, 0, 0);

                /* Take the JPEG codec and the VFE out of sleep */
                jpeg_codec_sleep(zr, 0);
                /* Setup the VFE */
                if (zr->vfe) {
                        zr->vfe->set_video(zr->vfe, zr->timing, &cap,
                                           &zr->card.vfe_pol);
                        zr->vfe->set_mode(zr->vfe, CODEC_DO_EXPANSION);
                }
                /* Setup the JPEG codec */
                zr->codec->set_video(zr->codec, zr->timing, &cap,
                                     &zr->card.vfe_pol);
                zr->codec->set_mode(zr->codec, CODEC_DO_EXPANSION);

                init_jpeg_queue(zr);
                zr36057_set_jpg(zr, mode);      // \P_Reset, ... Video param, FIFO

                clear_interrupt_counters(zr);
                pci_info(zr->pci_dev, "enable_jpg(MOTION_DECOMPRESS)\n");
                break;

        case BUZ_MODE_IDLE:
        default:
                /* shut down processing */
                btand(~(zr->card.jpeg_int | ZR36057_ICR_JPEG_REP_IRQ),
                      ZR36057_ICR);
                btwrite(zr->card.jpeg_int | ZR36057_ICR_JPEG_REP_IRQ,
                        ZR36057_ISR);
                btand(~ZR36057_JMC_GO_EN, ZR36057_JMC); // \Go_en

                msleep(50);

                set_videobus_dir(zr, 0);
                set_frame(zr, 1);       // /FRAME
                btor(ZR36057_MCTCR_C_FLUSH, ZR36057_MCTCR);     // /CFlush
                btwrite(0, ZR36057_JPC);        // \P_Reset,\CodTrnsEn,\Active
                btand(~ZR36057_JMC_VFIFO_FB, ZR36057_JMC);
                btand(~ZR36057_JMC_SYNC_MSTR, ZR36057_JMC);
                jpeg_codec_reset(zr);
                jpeg_codec_sleep(zr, 1);
                zr36057_adjust_vfe(zr, mode);

                decoder_call(zr, video, s_stream, 1);
                encoder_call(zr, video, s_routing, 0, 0, 0);

                pci_info(zr->pci_dev, "enable_jpg(IDLE)\n");
                break;
        }
}

/* when this is called the spinlock must be held */
void zoran_feed_stat_com(struct zoran *zr)
{
        /* move frames from pending queue to DMA */

        int i, max_stat_com;
        struct zr_buffer *buf;
        struct vb2_v4l2_buffer *vbuf;
        dma_addr_t phys_addr = 0;
        unsigned long flags;
        unsigned long payload;

        max_stat_com =
            (zr->jpg_settings.tmp_dcm ==
             1) ? BUZ_NUM_STAT_COM : (BUZ_NUM_STAT_COM >> 1);

        spin_lock_irqsave(&zr->queued_bufs_lock, flags);
        while ((zr->jpg_dma_head - zr->jpg_dma_tail) < max_stat_com) {
                buf = list_first_entry_or_null(&zr->queued_bufs, struct zr_buffer, queue);
                if (!buf) {
                        pci_err(zr->pci_dev, "No buffer available to queue\n");
                        spin_unlock_irqrestore(&zr->queued_bufs_lock, flags);
                        return;
                }
                list_del(&buf->queue);
                zr->buf_in_reserve--;
                vbuf = &buf->vbuf;
                vbuf->vb2_buf.state = VB2_BUF_STATE_ACTIVE;
                phys_addr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
                payload = vb2_get_plane_payload(&vbuf->vb2_buf, 0);
                if (payload == 0)
                        payload = zr->buffer_size;
                if (zr->jpg_settings.tmp_dcm == 1) {
                        /* fill 1 stat_com entry */
                        i = (zr->jpg_dma_head -
                             zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
                        if (!(zr->stat_com[i] & cpu_to_le32(1)))
                                break;
                        zr->stat_comb[i * 2] = cpu_to_le32(phys_addr);
                        zr->stat_comb[i * 2 + 1] = cpu_to_le32((payload >> 1) | 1);
                        zr->inuse[i] = buf;
                        zr->stat_com[i] = cpu_to_le32(zr->p_scb + i * 2 * 4);
                } else {
                        /* fill 2 stat_com entries */
                        i = ((zr->jpg_dma_head -
                              zr->jpg_err_shift) & 1) * 2;
                        if (!(zr->stat_com[i] & cpu_to_le32(1)))
                                break;
                        zr->stat_com[i] = cpu_to_le32(zr->p_scb + i * 2 * 4);
                        zr->stat_com[i + 1] = cpu_to_le32(zr->p_scb + i * 2 * 4);

                        zr->stat_comb[i * 2] = cpu_to_le32(phys_addr);
                        zr->stat_comb[i * 2 + 1] = cpu_to_le32((payload >> 1) | 1);

                        zr->inuse[i] = buf;
                        zr->inuse[i + 1] = NULL;
                }
                zr->jpg_dma_head++;
        }
        spin_unlock_irqrestore(&zr->queued_bufs_lock, flags);
        if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS)
                zr->jpg_queued_num++;
}

/* when this is called the spinlock must be held */
static void zoran_reap_stat_com(struct zoran *zr)
{
        /* move frames from DMA queue to done queue */

        int i;
        u32 stat_com;
        unsigned int seq;
        unsigned int dif;
        unsigned long flags;
        struct zr_buffer *buf;
        unsigned int size = 0;
        u32 fcnt;

        /* In motion decompress we don't have a hardware frame counter,
         * we just count the interrupts here */

        if (zr->codec_mode == BUZ_MODE_MOTION_DECOMPRESS)
                zr->jpg_seq_num++;

        spin_lock_irqsave(&zr->queued_bufs_lock, flags);
        while (zr->jpg_dma_tail < zr->jpg_dma_head) {
                if (zr->jpg_settings.tmp_dcm == 1)
                        i = (zr->jpg_dma_tail - zr->jpg_err_shift) & BUZ_MASK_STAT_COM;
                else
                        i = ((zr->jpg_dma_tail - zr->jpg_err_shift) & 1) * 2 + 1;

                stat_com = le32_to_cpu(zr->stat_com[i]);
                if ((stat_com & 1) == 0) {
                        spin_unlock_irqrestore(&zr->queued_bufs_lock, flags);
                        return;
                }

                fcnt = (stat_com & GENMASK(31, 24)) >> 24;
                size = (stat_com & GENMASK(22, 1)) >> 1;

                buf = zr->inuse[i];
                buf->vbuf.vb2_buf.timestamp = ktime_get_ns();

                if (zr->codec_mode == BUZ_MODE_MOTION_COMPRESS) {
                        vb2_set_plane_payload(&buf->vbuf.vb2_buf, 0, size);

                        /* update sequence number with the help of the counter in stat_com */
                        seq = (fcnt + zr->jpg_err_seq) & 0xff;
                        dif = (seq - zr->jpg_seq_num) & 0xff;
                        zr->jpg_seq_num += dif;
                }
                buf->vbuf.sequence = zr->jpg_settings.tmp_dcm ==
                    2 ? (zr->jpg_seq_num >> 1) : zr->jpg_seq_num;
                zr->inuse[i] = NULL;
                if (zr->jpg_settings.tmp_dcm != 1)
                        buf->vbuf.field = zr->jpg_settings.odd_even ?
                                V4L2_FIELD_TOP : V4L2_FIELD_BOTTOM;
                else
                        buf->vbuf.field = zr->jpg_settings.odd_even ?
                                V4L2_FIELD_SEQ_TB : V4L2_FIELD_SEQ_BT;
                vb2_buffer_done(&buf->vbuf.vb2_buf, VB2_BUF_STATE_DONE);

                zr->jpg_dma_tail++;
        }
        spin_unlock_irqrestore(&zr->queued_bufs_lock, flags);
}

irqreturn_t zoran_irq(int irq, void *dev_id)
{
        struct zoran *zr = dev_id;
        u32 stat, astat;

        stat = count_reset_interrupt(zr);
        astat = stat & IRQ_MASK;
        if (astat & zr->card.vsync_int) {
                if (zr->running == ZORAN_MAP_MODE_RAW) {
                        if ((btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_SNAP_SHOT) == 0)
                                pci_warn(zr->pci_dev, "BuzIRQ with SnapShot off ???\n");
                        if ((btread(ZR36057_VSSFGR) & ZR36057_VSSFGR_FRAME_GRAB) == 0)
                                zr_set_buf(zr);
                        return IRQ_HANDLED;
                }
                if (astat & ZR36057_ISR_JPEG_REP_IRQ) {
                        if (zr->codec_mode != BUZ_MODE_MOTION_DECOMPRESS &&
                            zr->codec_mode != BUZ_MODE_MOTION_COMPRESS) {
                                pci_err(zr->pci_dev, "JPG IRQ when not in good mode\n");
                                return IRQ_HANDLED;
                        }
                        zr->frame_num++;
                        zoran_reap_stat_com(zr);
                        zoran_feed_stat_com(zr);
                        return IRQ_HANDLED;
                }
                /* unused interrupts */
        }
        zr->ghost_int++;
        return IRQ_HANDLED;
}

void zoran_set_pci_master(struct zoran *zr, int set_master)
{
        if (set_master) {
                pci_set_master(zr->pci_dev);
        } else {
                u16 command;

                pci_read_config_word(zr->pci_dev, PCI_COMMAND, &command);
                command &= ~PCI_COMMAND_MASTER;
                pci_write_config_word(zr->pci_dev, PCI_COMMAND, command);
        }
}

void zoran_init_hardware(struct zoran *zr)
{
        /* Enable bus-mastering */
        zoran_set_pci_master(zr, 1);

        /* Initialize the board */
        if (zr->card.init)
                zr->card.init(zr);

        decoder_call(zr, core, init, 0);
        decoder_call(zr, video, s_std, zr->norm);
        decoder_call(zr, video, s_routing,
                     zr->card.input[zr->input].muxsel, 0, 0);

        encoder_call(zr, core, init, 0);
        encoder_call(zr, video, s_std_output, zr->norm);
        encoder_call(zr, video, s_routing, 0, 0, 0);

        /* toggle JPEG codec sleep to sync PLL */
        jpeg_codec_sleep(zr, 1);
        jpeg_codec_sleep(zr, 0);

        /*
         * set individual interrupt enables (without GIRQ1)
         * but don't global enable until zoran_open()
         */
        zr36057_init_vfe(zr);

        zr36057_enable_jpg(zr, BUZ_MODE_IDLE);

        btwrite(IRQ_MASK, ZR36057_ISR); // Clears interrupts
}

void zr36057_restart(struct zoran *zr)
{
        btwrite(0, ZR36057_SPGPPCR);
        udelay(1000);
        btor(ZR36057_SPGPPCR_SOFT_RESET, ZR36057_SPGPPCR);
        udelay(1000);

        /* assert P_Reset */
        btwrite(0, ZR36057_JPC);
        /* set up GPIO direction - all output */
        btwrite(ZR36057_SPGPPCR_SOFT_RESET | 0, ZR36057_SPGPPCR);

        /* set up GPIO pins and guest bus timing */
        btwrite((0x81 << 24) | 0x8888, ZR36057_GPPGCR1);
}