/*
 *
 *  Support for a cx23417 mpeg encoder via cx23885 host port.
 *
 *    (c) 2004 Jelle Foks <jelle@foks.us>
 *    (c) 2004 Gerd Knorr <kraxel@bytesex.org>
 *    (c) 2008 Steven Toth <stoth@linuxtv.org>
 *      - CX23885/7/8 support
 *
 *  Includes parts from the ivtv driver <http://sourceforge.net/projects/ivtv/>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/fs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <linux/slab.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/cx2341x.h>

#include "cx23885.h"
#include "cx23885-ioctl.h"

#define CX23885_FIRM_IMAGE_SIZE 376836
#define CX23885_FIRM_IMAGE_NAME "v4l-cx23885-enc.fw"

static unsigned int mpegbufs = 32;
module_param(mpegbufs, int, 0644);
MODULE_PARM_DESC(mpegbufs, "number of mpeg buffers, range 2-32");
static unsigned int mpeglines = 32;
module_param(mpeglines, int, 0644);
MODULE_PARM_DESC(mpeglines, "number of lines in an MPEG buffer, range 2-32");
static unsigned int mpeglinesize = 512;
module_param(mpeglinesize, int, 0644);
MODULE_PARM_DESC(mpeglinesize,
        "number of bytes in each line of an MPEG buffer, range 512-1024");

static unsigned int v4l_debug;
module_param(v4l_debug, int, 0644);
MODULE_PARM_DESC(v4l_debug, "enable V4L debug messages");

#define dprintk(level, fmt, arg...)\
        do { if (v4l_debug >= level) \
                printk(KERN_DEBUG "%s: " fmt, \
                (dev) ? dev->name : "cx23885[?]", ## arg); \
        } while (0)

static struct cx23885_tvnorm cx23885_tvnorms[] = {
        {
                .name      = "NTSC-M",
                .id        = V4L2_STD_NTSC_M,
        }, {
                .name      = "NTSC-JP",
                .id        = V4L2_STD_NTSC_M_JP,
        }, {
                .name      = "PAL-BG",
                .id        = V4L2_STD_PAL_BG,
        }, {
                .name      = "PAL-DK",
                .id        = V4L2_STD_PAL_DK,
        }, {
                .name      = "PAL-I",
                .id        = V4L2_STD_PAL_I,
        }, {
                .name      = "PAL-M",
                .id        = V4L2_STD_PAL_M,
        }, {
                .name      = "PAL-N",
                .id        = V4L2_STD_PAL_N,
        }, {
                .name      = "PAL-Nc",
                .id        = V4L2_STD_PAL_Nc,
        }, {
                .name      = "PAL-60",
                .id        = V4L2_STD_PAL_60,
        }, {
                .name      = "SECAM-L",
                .id        = V4L2_STD_SECAM_L,
        }, {
                .name      = "SECAM-DK",
                .id        = V4L2_STD_SECAM_DK,
        }
};

/* ------------------------------------------------------------------ */
enum cx23885_capture_type {
        CX23885_MPEG_CAPTURE,
        CX23885_RAW_CAPTURE,
        CX23885_RAW_PASSTHRU_CAPTURE
};
enum cx23885_capture_bits {
        CX23885_RAW_BITS_NONE             = 0x00,
        CX23885_RAW_BITS_YUV_CAPTURE      = 0x01,
        CX23885_RAW_BITS_PCM_CAPTURE      = 0x02,
        CX23885_RAW_BITS_VBI_CAPTURE      = 0x04,
        CX23885_RAW_BITS_PASSTHRU_CAPTURE = 0x08,
        CX23885_RAW_BITS_TO_HOST_CAPTURE  = 0x10
};
enum cx23885_capture_end {
        CX23885_END_AT_GOP, /* stop at the end of gop, generate irq */
        CX23885_END_NOW, /* stop immediately, no irq */
};
enum cx23885_framerate {
        CX23885_FRAMERATE_NTSC_30, /* NTSC: 30fps */
        CX23885_FRAMERATE_PAL_25   /* PAL: 25fps */
};
enum cx23885_stream_port {
        CX23885_OUTPUT_PORT_MEMORY,
        CX23885_OUTPUT_PORT_STREAMING,
        CX23885_OUTPUT_PORT_SERIAL
};
enum cx23885_data_xfer_status {
        CX23885_MORE_BUFFERS_FOLLOW,
        CX23885_LAST_BUFFER,
};
enum cx23885_picture_mask {
        CX23885_PICTURE_MASK_NONE,
        CX23885_PICTURE_MASK_I_FRAMES,
        CX23885_PICTURE_MASK_I_P_FRAMES = 0x3,
        CX23885_PICTURE_MASK_ALL_FRAMES = 0x7,
};
enum cx23885_vbi_mode_bits {
        CX23885_VBI_BITS_SLICED,
        CX23885_VBI_BITS_RAW,
};
enum cx23885_vbi_insertion_bits {
        CX23885_VBI_BITS_INSERT_IN_XTENSION_USR_DATA,
        CX23885_VBI_BITS_INSERT_IN_PRIVATE_PACKETS = 0x1 << 1,
        CX23885_VBI_BITS_SEPARATE_STREAM = 0x2 << 1,
        CX23885_VBI_BITS_SEPARATE_STREAM_USR_DATA = 0x4 << 1,
        CX23885_VBI_BITS_SEPARATE_STREAM_PRV_DATA = 0x5 << 1,
};
enum cx23885_dma_unit {
        CX23885_DMA_BYTES,
        CX23885_DMA_FRAMES,
};
enum cx23885_dma_transfer_status_bits {
        CX23885_DMA_TRANSFER_BITS_DONE = 0x01,
        CX23885_DMA_TRANSFER_BITS_ERROR = 0x04,
        CX23885_DMA_TRANSFER_BITS_LL_ERROR = 0x10,
};
enum cx23885_pause {
        CX23885_PAUSE_ENCODING,
        CX23885_RESUME_ENCODING,
};
enum cx23885_copyright {
        CX23885_COPYRIGHT_OFF,
        CX23885_COPYRIGHT_ON,
};
enum cx23885_notification_type {
        CX23885_NOTIFICATION_REFRESH,
};
enum cx23885_notification_status {
        CX23885_NOTIFICATION_OFF,
        CX23885_NOTIFICATION_ON,
};
enum cx23885_notification_mailbox {
        CX23885_NOTIFICATION_NO_MAILBOX = -1,
};
enum cx23885_field1_lines {
        CX23885_FIELD1_SAA7114 = 0x00EF, /* 239 */
        CX23885_FIELD1_SAA7115 = 0x00F0, /* 240 */
        CX23885_FIELD1_MICRONAS = 0x0105, /* 261 */
};
enum cx23885_field2_lines {
        CX23885_FIELD2_SAA7114 = 0x00EF, /* 239 */
        CX23885_FIELD2_SAA7115 = 0x00F0, /* 240 */
        CX23885_FIELD2_MICRONAS = 0x0106, /* 262 */
};
enum cx23885_custom_data_type {
        CX23885_CUSTOM_EXTENSION_USR_DATA,
        CX23885_CUSTOM_PRIVATE_PACKET,
};
enum cx23885_mute {
        CX23885_UNMUTE,
        CX23885_MUTE,
};
enum cx23885_mute_video_mask {
        CX23885_MUTE_VIDEO_V_MASK = 0x0000FF00,
        CX23885_MUTE_VIDEO_U_MASK = 0x00FF0000,
        CX23885_MUTE_VIDEO_Y_MASK = 0xFF000000,
};
enum cx23885_mute_video_shift {
        CX23885_MUTE_VIDEO_V_SHIFT = 8,
        CX23885_MUTE_VIDEO_U_SHIFT = 16,
        CX23885_MUTE_VIDEO_Y_SHIFT = 24,
};

/* defines below are from ivtv-driver.h */
#define IVTV_CMD_HW_BLOCKS_RST 0xFFFFFFFF

/* Firmware API commands */
#define IVTV_API_STD_TIMEOUT 500

/* Registers */
/* IVTV_REG_OFFSET */
#define IVTV_REG_ENC_SDRAM_REFRESH (0x07F8)
#define IVTV_REG_ENC_SDRAM_PRECHARGE (0x07FC)
#define IVTV_REG_SPU (0x9050)
#define IVTV_REG_HW_BLOCKS (0x9054)
#define IVTV_REG_VPU (0x9058)
#define IVTV_REG_APU (0xA064)

/**** Bit definitions for MC417_RWD and MC417_OEN registers  ***
  bits 31-16
+-----------+
| Reserved  |
+-----------+
  bit 15  bit 14  bit 13 bit 12  bit 11  bit 10  bit 9   bit 8
+-------+-------+-------+-------+-------+-------+-------+-------+
| MIWR# | MIRD# | MICS# |MIRDY# |MIADDR3|MIADDR2|MIADDR1|MIADDR0|
+-------+-------+-------+-------+-------+-------+-------+-------+
 bit 7   bit 6   bit 5   bit 4   bit 3   bit 2   bit 1   bit 0
+-------+-------+-------+-------+-------+-------+-------+-------+
|MIDATA7|MIDATA6|MIDATA5|MIDATA4|MIDATA3|MIDATA2|MIDATA1|MIDATA0|
+-------+-------+-------+-------+-------+-------+-------+-------+
***/
#define MC417_MIWR      0x8000
#define MC417_MIRD      0x4000
#define MC417_MICS      0x2000
#define MC417_MIRDY     0x1000
#define MC417_MIADDR    0x0F00
#define MC417_MIDATA    0x00FF

/* MIADDR* nibble definitions */
#define  MCI_MEMORY_DATA_BYTE0          0x000
#define  MCI_MEMORY_DATA_BYTE1          0x100
#define  MCI_MEMORY_DATA_BYTE2          0x200
#define  MCI_MEMORY_DATA_BYTE3          0x300
#define  MCI_MEMORY_ADDRESS_BYTE2       0x400
#define  MCI_MEMORY_ADDRESS_BYTE1       0x500
#define  MCI_MEMORY_ADDRESS_BYTE0       0x600
#define  MCI_REGISTER_DATA_BYTE0        0x800
#define  MCI_REGISTER_DATA_BYTE1        0x900
#define  MCI_REGISTER_DATA_BYTE2        0xA00
#define  MCI_REGISTER_DATA_BYTE3        0xB00
#define  MCI_REGISTER_ADDRESS_BYTE0     0xC00
#define  MCI_REGISTER_ADDRESS_BYTE1     0xD00
#define  MCI_REGISTER_MODE              0xE00

/* Read and write modes */
#define  MCI_MODE_REGISTER_READ         0
#define  MCI_MODE_REGISTER_WRITE        1
#define  MCI_MODE_MEMORY_READ           0
#define  MCI_MODE_MEMORY_WRITE          0x40

/*** Bit definitions for MC417_CTL register ****
 bits 31-6   bits 5-4   bit 3    bits 2-1       Bit 0
+--------+-------------+--------+--------------+------------+
|Reserved|MC417_SPD_CTL|Reserved|MC417_GPIO_SEL|UART_GPIO_EN|
+--------+-------------+--------+--------------+------------+
***/
#define MC417_SPD_CTL(x)        (((x) << 4) & 0x00000030)
#define MC417_GPIO_SEL(x)       (((x) << 1) & 0x00000006)
#define MC417_UART_GPIO_EN      0x00000001

/* Values for speed control */
#define MC417_SPD_CTL_SLOW      0x1
#define MC417_SPD_CTL_MEDIUM    0x0
#define MC417_SPD_CTL_FAST      0x3     /* b'1x, but we use b'11 */

/* Values for GPIO select */
#define MC417_GPIO_SEL_GPIO3    0x3
#define MC417_GPIO_SEL_GPIO2    0x2
#define MC417_GPIO_SEL_GPIO1    0x1
#define MC417_GPIO_SEL_GPIO0    0x0

void cx23885_mc417_init(struct cx23885_dev *dev)
{
        u32 regval;

        dprintk(2, "%s()\n", __func__);

        /* Configure MC417_CTL register to defaults. */
        regval = MC417_SPD_CTL(MC417_SPD_CTL_FAST)      |
                 MC417_GPIO_SEL(MC417_GPIO_SEL_GPIO3)   |
                 MC417_UART_GPIO_EN;
        cx_write(MC417_CTL, regval);

        /* Configure MC417_OEN to defaults. */
        regval = MC417_MIRDY;
        cx_write(MC417_OEN, regval);

        /* Configure MC417_RWD to defaults. */
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS;
        cx_write(MC417_RWD, regval);
}

static int mc417_wait_ready(struct cx23885_dev *dev)
{
        u32 mi_ready;
        unsigned long timeout = jiffies + msecs_to_jiffies(1);

        for (;;) {
                mi_ready = cx_read(MC417_RWD) & MC417_MIRDY;
                if (mi_ready != 0)
                        return 0;
                if (time_after(jiffies, timeout))
                        return -1;
                udelay(1);
        }
}

int mc417_register_write(struct cx23885_dev *dev, u16 address, u32 value)
{
        u32 regval;

        /* Enable MC417 GPIO outputs except for MC417_MIRDY,
         * which is an input.
         */
        cx_write(MC417_OEN, MC417_MIRDY);

        /* Write data byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE0 |
                (value & 0x000000FF);
        cx_write(MC417_RWD, regval);

        /* Transition CS/WR to effect write transaction across bus. */
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write data byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE1 |
                ((value >> 8) & 0x000000FF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write data byte 2 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE2 |
                ((value >> 16) & 0x000000FF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write data byte 3 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE3 |
                ((value >> 24) & 0x000000FF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_ADDRESS_BYTE0 |
                (address & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_ADDRESS_BYTE1 |
                ((address >> 8) & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Indicate that this is a write. */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_MODE |
                MCI_MODE_REGISTER_WRITE;
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Wait for the trans to complete (MC417_MIRDY asserted). */
        return mc417_wait_ready(dev);
}

int mc417_register_read(struct cx23885_dev *dev, u16 address, u32 *value)
{
        int retval;
        u32 regval;
        u32 tempval;
        u32 dataval;

        /* Enable MC417 GPIO outputs except for MC417_MIRDY,
         * which is an input.
         */
        cx_write(MC417_OEN, MC417_MIRDY);

        /* Write address byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_ADDRESS_BYTE0 |
                ((address & 0x00FF));
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_ADDRESS_BYTE1 |
                ((address >> 8) & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Indicate that this is a register read. */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_MODE |
                MCI_MODE_REGISTER_READ;
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Wait for the trans to complete (MC417_MIRDY asserted). */
        retval = mc417_wait_ready(dev);

        /* switch the DAT0-7 GPIO[10:3] to input mode */
        cx_write(MC417_OEN, MC417_MIRDY | MC417_MIDATA);

        /* Read data byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE0;
        cx_write(MC417_RWD, regval);

        /* Transition RD to effect read transaction across bus.
         * Transtion 0x5000 -> 0x9000 correct (RD/RDY -> WR/RDY)?
         * Should it be 0x9000 -> 0xF000 (also why is RDY being set, its
         * input only...)
         */
        regval = MC417_MIWR | MC417_MIRDY | MCI_REGISTER_DATA_BYTE0;
        cx_write(MC417_RWD, regval);

        /* Collect byte */
        tempval = cx_read(MC417_RWD);
        dataval = tempval & 0x000000FF;

        /* Bring CS and RD high. */
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        /* Read data byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE1;
        cx_write(MC417_RWD, regval);
        regval = MC417_MIWR | MC417_MIRDY | MCI_REGISTER_DATA_BYTE1;
        cx_write(MC417_RWD, regval);
        tempval = cx_read(MC417_RWD);
        dataval |= ((tempval & 0x000000FF) << 8);
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        /* Read data byte 2 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE2;
        cx_write(MC417_RWD, regval);
        regval = MC417_MIWR | MC417_MIRDY | MCI_REGISTER_DATA_BYTE2;
        cx_write(MC417_RWD, regval);
        tempval = cx_read(MC417_RWD);
        dataval |= ((tempval & 0x000000FF) << 16);
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        /* Read data byte 3 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_REGISTER_DATA_BYTE3;
        cx_write(MC417_RWD, regval);
        regval = MC417_MIWR | MC417_MIRDY | MCI_REGISTER_DATA_BYTE3;
        cx_write(MC417_RWD, regval);
        tempval = cx_read(MC417_RWD);
        dataval |= ((tempval & 0x000000FF) << 24);
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        *value  = dataval;

        return retval;
}

int mc417_memory_write(struct cx23885_dev *dev, u32 address, u32 value)
{
        u32 regval;

        /* Enable MC417 GPIO outputs except for MC417_MIRDY,
         * which is an input.
         */
        cx_write(MC417_OEN, MC417_MIRDY);

        /* Write data byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE0 |
                (value & 0x000000FF);
        cx_write(MC417_RWD, regval);

        /* Transition CS/WR to effect write transaction across bus. */
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write data byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE1 |
                ((value >> 8) & 0x000000FF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write data byte 2 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE2 |
                ((value >> 16) & 0x000000FF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write data byte 3 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE3 |
                ((value >> 24) & 0x000000FF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 2 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_ADDRESS_BYTE2 |
                MCI_MODE_MEMORY_WRITE | ((address >> 16) & 0x3F);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_ADDRESS_BYTE1 |
                ((address >> 8) & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_ADDRESS_BYTE0 |
                (address & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Wait for the trans to complete (MC417_MIRDY asserted). */
        return mc417_wait_ready(dev);
}

int mc417_memory_read(struct cx23885_dev *dev, u32 address, u32 *value)
{
        int retval;
        u32 regval;
        u32 tempval;
        u32 dataval;

        /* Enable MC417 GPIO outputs except for MC417_MIRDY,
         * which is an input.
         */
        cx_write(MC417_OEN, MC417_MIRDY);

        /* Write address byte 2 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_ADDRESS_BYTE2 |
                MCI_MODE_MEMORY_READ | ((address >> 16) & 0x3F);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_ADDRESS_BYTE1 |
                ((address >> 8) & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Write address byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_ADDRESS_BYTE0 |
                (address & 0xFF);
        cx_write(MC417_RWD, regval);
        regval |= MC417_MICS | MC417_MIWR;
        cx_write(MC417_RWD, regval);

        /* Wait for the trans to complete (MC417_MIRDY asserted). */
        retval = mc417_wait_ready(dev);

        /* switch the DAT0-7 GPIO[10:3] to input mode */
        cx_write(MC417_OEN, MC417_MIRDY | MC417_MIDATA);

        /* Read data byte 3 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE3;
        cx_write(MC417_RWD, regval);

        /* Transition RD to effect read transaction across bus. */
        regval = MC417_MIWR | MC417_MIRDY | MCI_MEMORY_DATA_BYTE3;
        cx_write(MC417_RWD, regval);

        /* Collect byte */
        tempval = cx_read(MC417_RWD);
        dataval = ((tempval & 0x000000FF) << 24);

        /* Bring CS and RD high. */
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        /* Read data byte 2 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE2;
        cx_write(MC417_RWD, regval);
        regval = MC417_MIWR | MC417_MIRDY | MCI_MEMORY_DATA_BYTE2;
        cx_write(MC417_RWD, regval);
        tempval = cx_read(MC417_RWD);
        dataval |= ((tempval & 0x000000FF) << 16);
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        /* Read data byte 1 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE1;
        cx_write(MC417_RWD, regval);
        regval = MC417_MIWR | MC417_MIRDY | MCI_MEMORY_DATA_BYTE1;
        cx_write(MC417_RWD, regval);
        tempval = cx_read(MC417_RWD);
        dataval |= ((tempval & 0x000000FF) << 8);
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        /* Read data byte 0 */
        regval = MC417_MIRD | MC417_MIRDY | MCI_MEMORY_DATA_BYTE0;
        cx_write(MC417_RWD, regval);
        regval = MC417_MIWR | MC417_MIRDY | MCI_MEMORY_DATA_BYTE0;
        cx_write(MC417_RWD, regval);
        tempval = cx_read(MC417_RWD);
        dataval |= (tempval & 0x000000FF);
        regval = MC417_MIWR | MC417_MIRD | MC417_MICS | MC417_MIRDY;
        cx_write(MC417_RWD, regval);

        *value  = dataval;

        return retval;
}

void mc417_gpio_set(struct cx23885_dev *dev, u32 mask)
{
        u32 val;

        /* Set the gpio value */
        mc417_register_read(dev, 0x900C, &val);
        val |= (mask & 0x000ffff);
        mc417_register_write(dev, 0x900C, val);
}

void mc417_gpio_clear(struct cx23885_dev *dev, u32 mask)
{
        u32 val;

        /* Clear the gpio value */
        mc417_register_read(dev, 0x900C, &val);
        val &= ~(mask & 0x0000ffff);
        mc417_register_write(dev, 0x900C, val);
}

void mc417_gpio_enable(struct cx23885_dev *dev, u32 mask, int asoutput)
{
        u32 val;

        /* Enable GPIO direction bits */
        mc417_register_read(dev, 0x9020, &val);
        if (asoutput)
                val |= (mask & 0x0000ffff);
        else
                val &= ~(mask & 0x0000ffff);

        mc417_register_write(dev, 0x9020, val);
}
/* ------------------------------------------------------------------ */

/* MPEG encoder API */
static char *cmd_to_str(int cmd)
{
        switch (cmd) {
        case CX2341X_ENC_PING_FW:
                return  "PING_FW";
        case CX2341X_ENC_START_CAPTURE:
                return  "START_CAPTURE";
        case CX2341X_ENC_STOP_CAPTURE:
                return  "STOP_CAPTURE";
        case CX2341X_ENC_SET_AUDIO_ID:
                return  "SET_AUDIO_ID";
        case CX2341X_ENC_SET_VIDEO_ID:
                return  "SET_VIDEO_ID";
        case CX2341X_ENC_SET_PCR_ID:
                return  "SET_PCR_ID";
        case CX2341X_ENC_SET_FRAME_RATE:
                return  "SET_FRAME_RATE";
        case CX2341X_ENC_SET_FRAME_SIZE:
                return  "SET_FRAME_SIZE";
        case CX2341X_ENC_SET_BIT_RATE:
                return  "SET_BIT_RATE";
        case CX2341X_ENC_SET_GOP_PROPERTIES:
                return  "SET_GOP_PROPERTIES";
        case CX2341X_ENC_SET_ASPECT_RATIO:
                return  "SET_ASPECT_RATIO";
        case CX2341X_ENC_SET_DNR_FILTER_MODE:
                return  "SET_DNR_FILTER_MODE";
        case CX2341X_ENC_SET_DNR_FILTER_PROPS:
                return  "SET_DNR_FILTER_PROPS";
        case CX2341X_ENC_SET_CORING_LEVELS:
                return  "SET_CORING_LEVELS";
        case CX2341X_ENC_SET_SPATIAL_FILTER_TYPE:
                return  "SET_SPATIAL_FILTER_TYPE";
        case CX2341X_ENC_SET_VBI_LINE:
                return  "SET_VBI_LINE";
        case CX2341X_ENC_SET_STREAM_TYPE:
                return  "SET_STREAM_TYPE";
        case CX2341X_ENC_SET_OUTPUT_PORT:
                return  "SET_OUTPUT_PORT";
        case CX2341X_ENC_SET_AUDIO_PROPERTIES:
                return  "SET_AUDIO_PROPERTIES";
        case CX2341X_ENC_HALT_FW:
                return  "HALT_FW";
        case CX2341X_ENC_GET_VERSION:
                return  "GET_VERSION";
        case CX2341X_ENC_SET_GOP_CLOSURE:
                return  "SET_GOP_CLOSURE";
        case CX2341X_ENC_GET_SEQ_END:
                return  "GET_SEQ_END";
        case CX2341X_ENC_SET_PGM_INDEX_INFO:
                return  "SET_PGM_INDEX_INFO";
        case CX2341X_ENC_SET_VBI_CONFIG:
                return  "SET_VBI_CONFIG";
        case CX2341X_ENC_SET_DMA_BLOCK_SIZE:
                return  "SET_DMA_BLOCK_SIZE";
        case CX2341X_ENC_GET_PREV_DMA_INFO_MB_10:
                return  "GET_PREV_DMA_INFO_MB_10";
        case CX2341X_ENC_GET_PREV_DMA_INFO_MB_9:
                return  "GET_PREV_DMA_INFO_MB_9";
        case CX2341X_ENC_SCHED_DMA_TO_HOST:
                return  "SCHED_DMA_TO_HOST";
        case CX2341X_ENC_INITIALIZE_INPUT:
                return  "INITIALIZE_INPUT";
        case CX2341X_ENC_SET_FRAME_DROP_RATE:
                return  "SET_FRAME_DROP_RATE";
        case CX2341X_ENC_PAUSE_ENCODER:
                return  "PAUSE_ENCODER";
        case CX2341X_ENC_REFRESH_INPUT:
                return  "REFRESH_INPUT";
        case CX2341X_ENC_SET_COPYRIGHT:
                return  "SET_COPYRIGHT";
        case CX2341X_ENC_SET_EVENT_NOTIFICATION:
                return  "SET_EVENT_NOTIFICATION";
        case CX2341X_ENC_SET_NUM_VSYNC_LINES:
                return  "SET_NUM_VSYNC_LINES";
        case CX2341X_ENC_SET_PLACEHOLDER:
                return  "SET_PLACEHOLDER";
        case CX2341X_ENC_MUTE_VIDEO:
                return  "MUTE_VIDEO";
        case CX2341X_ENC_MUTE_AUDIO:
                return  "MUTE_AUDIO";
        case CX2341X_ENC_MISC:
                return  "MISC";
        default:
                return "UNKNOWN";
        }
}

static int cx23885_mbox_func(void *priv,
                             u32 command,
                             int in,
                             int out,
                             u32 data[CX2341X_MBOX_MAX_DATA])
{
        struct cx23885_dev *dev = priv;
        unsigned long timeout;
        u32 value, flag, retval = 0;
        int i;

        dprintk(3, "%s: command(0x%X) = %s\n", __func__, command,
                cmd_to_str(command));

        /* this may not be 100% safe if we can't read any memory location
           without side effects */
        mc417_memory_read(dev, dev->cx23417_mailbox - 4, &value);
        if (value != 0x12345678) {
                printk(KERN_ERR
                        "Firmware and/or mailbox pointer not initialized "
                        "or corrupted, signature = 0x%x, cmd = %s\n", value,
                        cmd_to_str(command));
                return -1;
        }

        /* This read looks at 32 bits, but flag is only 8 bits.
         * Seems we also bail if CMD or TIMEOUT bytes are set???
         */
        mc417_memory_read(dev, dev->cx23417_mailbox, &flag);
        if (flag) {
                printk(KERN_ERR "ERROR: Mailbox appears to be in use "
                        "(%x), cmd = %s\n", flag, cmd_to_str(command));
                return -1;
        }

        flag |= 1; /* tell 'em we're working on it */
        mc417_memory_write(dev, dev->cx23417_mailbox, flag);

        /* write command + args + fill remaining with zeros */
        /* command code */
        mc417_memory_write(dev, dev->cx23417_mailbox + 1, command);
        mc417_memory_write(dev, dev->cx23417_mailbox + 3,
                IVTV_API_STD_TIMEOUT); /* timeout */
        for (i = 0; i < in; i++) {
                mc417_memory_write(dev, dev->cx23417_mailbox + 4 + i, data[i]);
                dprintk(3, "API Input %d = %d\n", i, data[i]);
        }
        for (; i < CX2341X_MBOX_MAX_DATA; i++)
                mc417_memory_write(dev, dev->cx23417_mailbox + 4 + i, 0);

        flag |= 3; /* tell 'em we're done writing */
        mc417_memory_write(dev, dev->cx23417_mailbox, flag);

        /* wait for firmware to handle the API command */
        timeout = jiffies + msecs_to_jiffies(10);
        for (;;) {
                mc417_memory_read(dev, dev->cx23417_mailbox, &flag);
                if (0 != (flag & 4))
                        break;
                if (time_after(jiffies, timeout)) {
                        printk(KERN_ERR "ERROR: API Mailbox timeout\n");
                        return -1;
                }
                udelay(10);
        }

        /* read output values */
        for (i = 0; i < out; i++) {
                mc417_memory_read(dev, dev->cx23417_mailbox + 4 + i, data + i);
                dprintk(3, "API Output %d = %d\n", i, data[i]);
        }

        mc417_memory_read(dev, dev->cx23417_mailbox + 2, &retval);
        dprintk(3, "API result = %d\n", retval);

        flag = 0;
        mc417_memory_write(dev, dev->cx23417_mailbox, flag);

        return retval;
}

/* We don't need to call the API often, so using just one
 * mailbox will probably suffice
 */
static int cx23885_api_cmd(struct cx23885_dev *dev,
                           u32 command,
                           u32 inputcnt,
                           u32 outputcnt,
                           ...)
{
        u32 data[CX2341X_MBOX_MAX_DATA];
        va_list vargs;
        int i, err;

        dprintk(3, "%s() cmds = 0x%08x\n", __func__, command);

        va_start(vargs, outputcnt);
        for (i = 0; i < inputcnt; i++)
                data[i] = va_arg(vargs, int);

        err = cx23885_mbox_func(dev, command, inputcnt, outputcnt, data);
        for (i = 0; i < outputcnt; i++) {
                int *vptr = va_arg(vargs, int *);
                *vptr = data[i];
        }
        va_end(vargs);

        return err;
}

static int cx23885_find_mailbox(struct cx23885_dev *dev)
{
        u32 signature[4] = {
                0x12345678, 0x34567812, 0x56781234, 0x78123456
        };
        int signaturecnt = 0;
        u32 value;
        int i;

        dprintk(2, "%s()\n", __func__);

        for (i = 0; i < CX23885_FIRM_IMAGE_SIZE; i++) {
                mc417_memory_read(dev, i, &value);
                if (value == signature[signaturecnt])
                        signaturecnt++;
                else
                        signaturecnt = 0;
                if (4 == signaturecnt) {
                        dprintk(1, "Mailbox signature found at 0x%x\n", i+1);
                        return i+1;
                }
        }
        printk(KERN_ERR "Mailbox signature values not found!\n");
        return -1;
}

static int cx23885_load_firmware(struct cx23885_dev *dev)
{
        static const unsigned char magic[8] = {
                0xa7, 0x0d, 0x00, 0x00, 0x66, 0xbb, 0x55, 0xaa
        };
        const struct firmware *firmware;
        int i, retval = 0;
        u32 value = 0;
        u32 gpio_output = 0;
        u32 gpio_value;
        u32 checksum = 0;
        u32 *dataptr;

        dprintk(2, "%s()\n", __func__);

        /* Save GPIO settings before reset of APU */
        retval |= mc417_memory_read(dev, 0x9020, &gpio_output);
        retval |= mc417_memory_read(dev, 0x900C, &gpio_value);

        retval  = mc417_register_write(dev,
                IVTV_REG_VPU, 0xFFFFFFED);
        retval |= mc417_register_write(dev,
                IVTV_REG_HW_BLOCKS, IVTV_CMD_HW_BLOCKS_RST);
        retval |= mc417_register_write(dev,
                IVTV_REG_ENC_SDRAM_REFRESH, 0x80000800);
        retval |= mc417_register_write(dev,
                IVTV_REG_ENC_SDRAM_PRECHARGE, 0x1A);
        retval |= mc417_register_write(dev,
                IVTV_REG_APU, 0);

        if (retval != 0) {
                printk(KERN_ERR "%s: Error with mc417_register_write\n",
                        __func__);
                return -1;
        }

        retval = request_firmware(&firmware, CX23885_FIRM_IMAGE_NAME,
                                  &dev->pci->dev);

        if (retval != 0) {
                printk(KERN_ERR
                        "ERROR: Hotplug firmware request failed (%s).\n",
                        CX23885_FIRM_IMAGE_NAME);
                printk(KERN_ERR "Please fix your hotplug setup, the board will "
                        "not work without firmware loaded!\n");
                return -1;
        }

        if (firmware->size != CX23885_FIRM_IMAGE_SIZE) {
                printk(KERN_ERR "ERROR: Firmware size mismatch "
                        "(have %zd, expected %d)\n",
                        firmware->size, CX23885_FIRM_IMAGE_SIZE);
                release_firmware(firmware);
                return -1;
        }

        if (0 != memcmp(firmware->data, magic, 8)) {
                printk(KERN_ERR
                        "ERROR: Firmware magic mismatch, wrong file?\n");
                release_firmware(firmware);
                return -1;
        }

        /* transfer to the chip */
        dprintk(2, "Loading firmware ...\n");
        dataptr = (u32 *)firmware->data;
        for (i = 0; i < (firmware->size >> 2); i++) {
                value = *dataptr;
                checksum += ~value;
                if (mc417_memory_write(dev, i, value) != 0) {
                        printk(KERN_ERR "ERROR: Loading firmware failed!\n");
                        release_firmware(firmware);
                        return -1;
                }
                dataptr++;
        }

        /* read back to verify with the checksum */
        dprintk(1, "Verifying firmware ...\n");
        for (i--; i >= 0; i--) {
                if (mc417_memory_read(dev, i, &value) != 0) {
                        printk(KERN_ERR "ERROR: Reading firmware failed!\n");
                        release_firmware(firmware);
                        return -1;
                }
                checksum -= ~value;
        }
        if (checksum) {
                printk(KERN_ERR
                        "ERROR: Firmware load failed (checksum mismatch).\n");
                release_firmware(firmware);
                return -1;
        }
        release_firmware(firmware);
        dprintk(1, "Firmware upload successful.\n");

        retval |= mc417_register_write(dev, IVTV_REG_HW_BLOCKS,
                IVTV_CMD_HW_BLOCKS_RST);

        /* F/W power up disturbs the GPIOs, restore state */
        retval |= mc417_register_write(dev, 0x9020, gpio_output);
        retval |= mc417_register_write(dev, 0x900C, gpio_value);

        retval |= mc417_register_read(dev, IVTV_REG_VPU, &value);
        retval |= mc417_register_write(dev, IVTV_REG_VPU, value & 0xFFFFFFE8);

        /* Hardcoded GPIO's here */

        retval |= mc417_register_write(dev, 0x9020, 0x4000);
        retval |= mc417_register_write(dev, 0x900C, 0x4000);

        mc417_register_read(dev, 0x9020, &gpio_output);
        mc417_register_read(dev, 0x900C, &gpio_value);

        if (retval < 0)
                printk(KERN_ERR "%s: Error with mc417_register_write\n",
                        __func__);
        return 0;
}

void cx23885_417_check_encoder(struct cx23885_dev *dev)
{
        u32 status, seq;

        status = seq = 0;
        cx23885_api_cmd(dev, CX2341X_ENC_GET_SEQ_END, 0, 2, &status, &seq);
        dprintk(1, "%s() status = %d, seq = %d\n", __func__, status, seq);
}

static void cx23885_codec_settings(struct cx23885_dev *dev)
{
        dprintk(1, "%s()\n", __func__);

        /* Dynamically change the height based on video standard */
        if (dev->encodernorm.id & V4L2_STD_525_60)
                dev->ts1.height = 480;
        else
                dev->ts1.height = 576;

        /* assign frame size */
        cx23885_api_cmd(dev, CX2341X_ENC_SET_FRAME_SIZE, 2, 0,
                                dev->ts1.height, dev->ts1.width);

        dev->mpeg_params.width = dev->ts1.width;
        dev->mpeg_params.height = dev->ts1.height;
        dev->mpeg_params.is_50hz =
                (dev->encodernorm.id & V4L2_STD_625_50) != 0;

        cx2341x_update(dev, cx23885_mbox_func, NULL, &dev->mpeg_params);

        cx23885_api_cmd(dev, CX2341X_ENC_MISC, 2, 0, 3, 1);
        cx23885_api_cmd(dev, CX2341X_ENC_MISC, 2, 0, 4, 1);
}

static int cx23885_initialize_codec(struct cx23885_dev *dev, int startencoder)
{
        int version;
        int retval;
        u32 i, data[7];

        dprintk(1, "%s()\n", __func__);

        retval = cx23885_api_cmd(dev, CX2341X_ENC_PING_FW, 0, 0); /* ping */
        if (retval < 0) {
                dprintk(2, "%s() PING OK\n", __func__);
                retval = cx23885_load_firmware(dev);
                if (retval < 0) {
                        printk(KERN_ERR "%s() f/w load failed\n", __func__);
                        return retval;
                }
                retval = cx23885_find_mailbox(dev);
                if (retval < 0) {
                        printk(KERN_ERR "%s() mailbox < 0, error\n",
                                __func__);
                        return -1;
                }
                dev->cx23417_mailbox = retval;
                retval = cx23885_api_cmd(dev, CX2341X_ENC_PING_FW, 0, 0);
                if (retval < 0) {
                        printk(KERN_ERR
                                "ERROR: cx23417 firmware ping failed!\n");
                        return -1;
                }
                retval = cx23885_api_cmd(dev, CX2341X_ENC_GET_VERSION, 0, 1,
                        &version);
                if (retval < 0) {
                        printk(KERN_ERR "ERROR: cx23417 firmware get encoder :"
                                "version failed!\n");
                        return -1;
                }
                dprintk(1, "cx23417 firmware version is 0x%08x\n", version);
                msleep(200);
        }

        cx23885_codec_settings(dev);
        msleep(60);

        cx23885_api_cmd(dev, CX2341X_ENC_SET_NUM_VSYNC_LINES, 2, 0,
                CX23885_FIELD1_SAA7115, CX23885_FIELD2_SAA7115);
        cx23885_api_cmd(dev, CX2341X_ENC_SET_PLACEHOLDER, 12, 0,
                CX23885_CUSTOM_EXTENSION_USR_DATA, 0, 0, 0, 0, 0, 0, 0, 0, 0,
                0, 0);

        /* Setup to capture VBI */
        data[0] = 0x0001BD00;
        data[1] = 1;          /* frames per interrupt */
        data[2] = 4;          /* total bufs */
        data[3] = 0x91559155; /* start codes */
        data[4] = 0x206080C0; /* stop codes */
        data[5] = 6;          /* lines */
        data[6] = 64;         /* BPL */

        cx23885_api_cmd(dev, CX2341X_ENC_SET_VBI_CONFIG, 7, 0, data[0], data[1],
                data[2], data[3], data[4], data[5], data[6]);

        for (i = 2; i <= 24; i++) {
                int valid;

                valid = ((i >= 19) && (i <= 21));
                cx23885_api_cmd(dev, CX2341X_ENC_SET_VBI_LINE, 5, 0, i,
                                valid, 0 , 0, 0);
                cx23885_api_cmd(dev, CX2341X_ENC_SET_VBI_LINE, 5, 0,
                                i | 0x80000000, valid, 0, 0, 0);
        }

        cx23885_api_cmd(dev, CX2341X_ENC_MUTE_AUDIO, 1, 0, CX23885_UNMUTE);
        msleep(60);

        /* initialize the video input */
        cx23885_api_cmd(dev, CX2341X_ENC_INITIALIZE_INPUT, 0, 0);
        msleep(60);

        /* Enable VIP style pixel invalidation so we work with scaled mode */
        mc417_memory_write(dev, 2120, 0x00000080);

        /* start capturing to the host interface */
        if (startencoder) {
                cx23885_api_cmd(dev, CX2341X_ENC_START_CAPTURE, 2, 0,
                        CX23885_MPEG_CAPTURE, CX23885_RAW_BITS_NONE);
                msleep(10);
        }

        return 0;
}

/* ------------------------------------------------------------------ */

static int bb_buf_setup(struct videobuf_queue *q,
        unsigned int *count, unsigned int *size)
{
        struct cx23885_fh *fh = q->priv_data;

        fh->dev->ts1.ts_packet_size  = mpeglinesize;
        fh->dev->ts1.ts_packet_count = mpeglines;

        *size = fh->dev->ts1.ts_packet_size * fh->dev->ts1.ts_packet_count;
        *count = mpegbufs;

        return 0;
}

static int bb_buf_prepare(struct videobuf_queue *q,
        struct videobuf_buffer *vb, enum v4l2_field field)
{
        struct cx23885_fh *fh = q->priv_data;
        return cx23885_buf_prepare(q, &fh->dev->ts1,
                (struct cx23885_buffer *)vb,
                field);
}

static void bb_buf_queue(struct videobuf_queue *q,
        struct videobuf_buffer *vb)
{
        struct cx23885_fh *fh = q->priv_data;
        cx23885_buf_queue(&fh->dev->ts1, (struct cx23885_buffer *)vb);
}

static void bb_buf_release(struct videobuf_queue *q,
        struct videobuf_buffer *vb)
{
        cx23885_free_buffer(q, (struct cx23885_buffer *)vb);
}

static struct videobuf_queue_ops cx23885_qops = {
        .buf_setup    = bb_buf_setup,
        .buf_prepare  = bb_buf_prepare,
        .buf_queue    = bb_buf_queue,
        .buf_release  = bb_buf_release,
};

/* ------------------------------------------------------------------ */

static const u32 *ctrl_classes[] = {
        cx2341x_mpeg_ctrls,
        NULL
};

static int cx23885_queryctrl(struct cx23885_dev *dev,
        struct v4l2_queryctrl *qctrl)
{
        qctrl->id = v4l2_ctrl_next(ctrl_classes, qctrl->id);
        if (qctrl->id == 0)
                return -EINVAL;

        /* MPEG V4L2 controls */
        if (cx2341x_ctrl_query(&dev->mpeg_params, qctrl))
                qctrl->flags |= V4L2_CTRL_FLAG_DISABLED;

        return 0;
}

static int cx23885_querymenu(struct cx23885_dev *dev,
        struct v4l2_querymenu *qmenu)
{
        struct v4l2_queryctrl qctrl;

        qctrl.id = qmenu->id;
        cx23885_queryctrl(dev, &qctrl);
        return v4l2_ctrl_query_menu(qmenu, &qctrl,
                cx2341x_ctrl_get_menu(&dev->mpeg_params, qmenu->id));
}

static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *id)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        *id = dev->tvnorm;
        return 0;
}

static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id id)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;
        unsigned int i;

        for (i = 0; i < ARRAY_SIZE(cx23885_tvnorms); i++)
                if (id & cx23885_tvnorms[i].id)
                        break;
        if (i == ARRAY_SIZE(cx23885_tvnorms))
                return -EINVAL;
        dev->encodernorm = cx23885_tvnorms[i];

        /* Have the drier core notify the subdevices */
        mutex_lock(&dev->lock);
        cx23885_set_tvnorm(dev, id);
        mutex_unlock(&dev->lock);

        return 0;
}

static int vidioc_enum_input(struct file *file, void *priv,
        struct v4l2_input *i)
{
        struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;
        dprintk(1, "%s()\n", __func__);
        return cx23885_enum_input(dev, i);
}

static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
{
        return cx23885_get_input(file, priv, i);
}

static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
{
        return cx23885_set_input(file, priv, i);
}

static int vidioc_g_tuner(struct file *file, void *priv,
                                struct v4l2_tuner *t)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        if (UNSET == dev->tuner_type)
                return -EINVAL;
        if (0 != t->index)
                return -EINVAL;
        strcpy(t->name, "Television");
        call_all(dev, tuner, g_tuner, t);

        dprintk(1, "VIDIOC_G_TUNER: tuner type %d\n", t->type);

        return 0;
}

static int vidioc_s_tuner(struct file *file, void *priv,
                                const struct v4l2_tuner *t)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        if (UNSET == dev->tuner_type)
                return -EINVAL;

        /* Update the A/V core */
        call_all(dev, tuner, s_tuner, t);

        return 0;
}

static int vidioc_g_frequency(struct file *file, void *priv,
                                struct v4l2_frequency *f)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        if (UNSET == dev->tuner_type)
                return -EINVAL;
        f->type = V4L2_TUNER_ANALOG_TV;
        f->frequency = dev->freq;

        call_all(dev, tuner, g_frequency, f);

        return 0;
}

static int vidioc_s_frequency(struct file *file, void *priv,
        const struct v4l2_frequency *f)
{
        return cx23885_set_frequency(file, priv, f);
}

static int vidioc_g_ctrl(struct file *file, void *priv,
        struct v4l2_control *ctl)
{
        struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

        return cx23885_get_control(dev, ctl);
}

static int vidioc_s_ctrl(struct file *file, void *priv,
        struct v4l2_control *ctl)
{
        struct cx23885_dev *dev = ((struct cx23885_fh *)priv)->dev;

        return cx23885_set_control(dev, ctl);
}

static int vidioc_querycap(struct file *file, void  *priv,
                                struct v4l2_capability *cap)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;
        struct cx23885_tsport  *tsport = &dev->ts1;

        strlcpy(cap->driver, dev->name, sizeof(cap->driver));
        strlcpy(cap->card, cx23885_boards[tsport->dev->board].name,
                sizeof(cap->card));
        sprintf(cap->bus_info, "PCI:%s", pci_name(dev->pci));
        cap->capabilities =
                V4L2_CAP_VIDEO_CAPTURE |
                V4L2_CAP_READWRITE     |
                V4L2_CAP_STREAMING     |
                0;
        if (UNSET != dev->tuner_type)
                cap->capabilities |= V4L2_CAP_TUNER;

        return 0;
}

static int vidioc_enum_fmt_vid_cap(struct file *file, void  *priv,
                                        struct v4l2_fmtdesc *f)
{
        if (f->index != 0)
                return -EINVAL;

        strlcpy(f->description, "MPEG", sizeof(f->description));
        f->pixelformat = V4L2_PIX_FMT_MPEG;

        return 0;
}

static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
        f->fmt.pix.bytesperline = 0;
        f->fmt.pix.sizeimage    =
                dev->ts1.ts_packet_size * dev->ts1.ts_packet_count;
        f->fmt.pix.colorspace   = 0;
        f->fmt.pix.width        = dev->ts1.width;
        f->fmt.pix.height       = dev->ts1.height;
        f->fmt.pix.field        = fh->mpegq.field;
        dprintk(1, "VIDIOC_G_FMT: w: %d, h: %d, f: %d\n",
                dev->ts1.width, dev->ts1.height, fh->mpegq.field);
        return 0;
}

static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
        f->fmt.pix.bytesperline = 0;
        f->fmt.pix.sizeimage    =
                dev->ts1.ts_packet_size * dev->ts1.ts_packet_count;
        f->fmt.pix.colorspace   = 0;
        dprintk(1, "VIDIOC_TRY_FMT: w: %d, h: %d, f: %d\n",
                dev->ts1.width, dev->ts1.height, fh->mpegq.field);
        return 0;
}

static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
                                struct v4l2_format *f)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        f->fmt.pix.pixelformat  = V4L2_PIX_FMT_MPEG;
        f->fmt.pix.bytesperline = 0;
        f->fmt.pix.sizeimage    =
                dev->ts1.ts_packet_size * dev->ts1.ts_packet_count;
        f->fmt.pix.colorspace   = 0;
        dprintk(1, "VIDIOC_S_FMT: w: %d, h: %d, f: %d\n",
                f->fmt.pix.width, f->fmt.pix.height, f->fmt.pix.field);
        return 0;
}

static int vidioc_reqbufs(struct file *file, void *priv,
                                struct v4l2_requestbuffers *p)
{
        struct cx23885_fh  *fh  = file->private_data;

        return videobuf_reqbufs(&fh->mpegq, p);
}

static int vidioc_querybuf(struct file *file, void *priv,
                                struct v4l2_buffer *p)
{
        struct cx23885_fh  *fh  = file->private_data;

        return videobuf_querybuf(&fh->mpegq, p);
}

static int vidioc_qbuf(struct file *file, void *priv,
                                struct v4l2_buffer *p)
{
        struct cx23885_fh  *fh  = file->private_data;

        return videobuf_qbuf(&fh->mpegq, p);
}

static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
{
        struct cx23885_fh  *fh  = priv;

        return videobuf_dqbuf(&fh->mpegq, b, file->f_flags & O_NONBLOCK);
}


static int vidioc_streamon(struct file *file, void *priv,
                                enum v4l2_buf_type i)
{
        struct cx23885_fh  *fh  = file->private_data;

        return videobuf_streamon(&fh->mpegq);
}

static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type i)
{
        struct cx23885_fh  *fh  = file->private_data;

        return videobuf_streamoff(&fh->mpegq);
}

static int vidioc_g_ext_ctrls(struct file *file, void *priv,
                                struct v4l2_ext_controls *f)
{
        struct cx23885_fh  *fh  = priv;
        struct cx23885_dev *dev = fh->dev;

        if (f->ctrl_class != V4L2_CTRL_CLASS_MPEG)
                return -EINVAL;
        return cx2341x_ext_ctrls(&dev->mpeg_params, 0, f, VIDIOC_G_EXT_CTRLS);
}

static int vidioc_s_ext_ctrls(struct file *file, void *priv,
                                struct v4l2_ext_controls *f)
{
        struct cx23885_fh  *fh  = priv;
        struct cx23885_dev *dev = fh->dev;
        struct cx2341x_mpeg_params p;
        int err;

        if (f->ctrl_class != V4L2_CTRL_CLASS_MPEG)
                return -EINVAL;

        p = dev->mpeg_params;
        err = cx2341x_ext_ctrls(&p, 0, f, VIDIOC_S_EXT_CTRLS);

        if (err == 0) {
                err = cx2341x_update(dev, cx23885_mbox_func,
                        &dev->mpeg_params, &p);
                dev->mpeg_params = p;
        }
        return err;
}

static int vidioc_try_ext_ctrls(struct file *file, void *priv,
                                struct v4l2_ext_controls *f)
{
        struct cx23885_fh  *fh  = priv;
        struct cx23885_dev *dev = fh->dev;
        struct cx2341x_mpeg_params p;
        int err;

        if (f->ctrl_class != V4L2_CTRL_CLASS_MPEG)
                return -EINVAL;

        p = dev->mpeg_params;
        err = cx2341x_ext_ctrls(&p, 0, f, VIDIOC_TRY_EXT_CTRLS);
        return err;
}

static int vidioc_log_status(struct file *file, void *priv)
{
        struct cx23885_fh  *fh  = priv;
        struct cx23885_dev *dev = fh->dev;
        char name[32 + 2];

        snprintf(name, sizeof(name), "%s/2", dev->name);
        printk(KERN_INFO
                "%s/2: ============  START LOG STATUS  ============\n",
               dev->name);
        call_all(dev, core, log_status);
        cx2341x_log_status(&dev->mpeg_params, name);
        printk(KERN_INFO
                "%s/2: =============  END LOG STATUS  =============\n",
               dev->name);
        return 0;
}

static int vidioc_querymenu(struct file *file, void *priv,
                                struct v4l2_querymenu *a)
{
        struct cx23885_fh  *fh  = priv;
        struct cx23885_dev *dev = fh->dev;

        return cx23885_querymenu(dev, a);
}

static int vidioc_queryctrl(struct file *file, void *priv,
                                struct v4l2_queryctrl *c)
{
        struct cx23885_fh  *fh  = priv;
        struct cx23885_dev *dev = fh->dev;

        return cx23885_queryctrl(dev, c);
}

static int mpeg_open(struct file *file)
{
        struct cx23885_dev *dev = video_drvdata(file);
        struct cx23885_fh *fh;

        dprintk(2, "%s()\n", __func__);

        /* allocate + initialize per filehandle data */
        fh = kzalloc(sizeof(*fh), GFP_KERNEL);
        if (!fh)
                return -ENOMEM;

        file->private_data = fh;
        fh->dev      = dev;

        videobuf_queue_sg_init(&fh->mpegq, &cx23885_qops,
                            &dev->pci->dev, &dev->ts1.slock,
                            V4L2_BUF_TYPE_VIDEO_CAPTURE,
                            V4L2_FIELD_INTERLACED,
                            sizeof(struct cx23885_buffer),
                            fh, NULL);
        return 0;
}

static int mpeg_release(struct file *file)
{
        struct cx23885_fh  *fh  = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        dprintk(2, "%s()\n", __func__);

        /* FIXME: Review this crap */
        /* Shut device down on last close */
        if (atomic_cmpxchg(&fh->v4l_reading, 1, 0) == 1) {
                if (atomic_dec_return(&dev->v4l_reader_count) == 0) {
                        /* stop mpeg capture */
                        cx23885_api_cmd(fh->dev, CX2341X_ENC_STOP_CAPTURE, 3, 0,
                                CX23885_END_NOW, CX23885_MPEG_CAPTURE,
                                CX23885_RAW_BITS_NONE);

                        msleep(500);
                        cx23885_417_check_encoder(dev);

                        cx23885_cancel_buffers(&fh->dev->ts1);
                }
        }

        if (fh->mpegq.streaming)
                videobuf_streamoff(&fh->mpegq);
        if (fh->mpegq.reading)
                videobuf_read_stop(&fh->mpegq);

        videobuf_mmap_free(&fh->mpegq);
        file->private_data = NULL;
        kfree(fh);

        return 0;
}

static ssize_t mpeg_read(struct file *file, char __user *data,
        size_t count, loff_t *ppos)
{
        struct cx23885_fh *fh = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        dprintk(2, "%s()\n", __func__);

        /* Deal w/ A/V decoder * and mpeg encoder sync issues. */
        /* Start mpeg encoder on first read. */
        if (atomic_cmpxchg(&fh->v4l_reading, 0, 1) == 0) {
                if (atomic_inc_return(&dev->v4l_reader_count) == 1) {
                        if (cx23885_initialize_codec(dev, 1) < 0)
                                return -EINVAL;
                }
        }

        return videobuf_read_stream(&fh->mpegq, data, count, ppos, 0,
                                    file->f_flags & O_NONBLOCK);
}

static unsigned int mpeg_poll(struct file *file,
        struct poll_table_struct *wait)
{
        struct cx23885_fh *fh = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        dprintk(2, "%s\n", __func__);

        return videobuf_poll_stream(file, &fh->mpegq, wait);
}

static int mpeg_mmap(struct file *file, struct vm_area_struct *vma)
{
        struct cx23885_fh *fh = file->private_data;
        struct cx23885_dev *dev = fh->dev;

        dprintk(2, "%s()\n", __func__);

        return videobuf_mmap_mapper(&fh->mpegq, vma);
}

static struct v4l2_file_operations mpeg_fops = {
        .owner         = THIS_MODULE,
        .open          = mpeg_open,
        .release       = mpeg_release,
        .read          = mpeg_read,
        .poll          = mpeg_poll,
        .mmap          = mpeg_mmap,
        .ioctl         = video_ioctl2,
};

static const struct v4l2_ioctl_ops mpeg_ioctl_ops = {
        .vidioc_g_std            = vidioc_g_std,
        .vidioc_s_std            = vidioc_s_std,
        .vidioc_enum_input       = vidioc_enum_input,
        .vidioc_g_input          = vidioc_g_input,
        .vidioc_s_input          = vidioc_s_input,
        .vidioc_g_tuner          = vidioc_g_tuner,
        .vidioc_s_tuner          = vidioc_s_tuner,
        .vidioc_g_frequency      = vidioc_g_frequency,
        .vidioc_s_frequency      = vidioc_s_frequency,
        .vidioc_s_ctrl           = vidioc_s_ctrl,
        .vidioc_g_ctrl           = vidioc_g_ctrl,
        .vidioc_querycap         = vidioc_querycap,
        .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
        .vidioc_g_fmt_vid_cap    = vidioc_g_fmt_vid_cap,
        .vidioc_try_fmt_vid_cap  = vidioc_try_fmt_vid_cap,
        .vidioc_s_fmt_vid_cap    = vidioc_s_fmt_vid_cap,
        .vidioc_reqbufs          = vidioc_reqbufs,
        .vidioc_querybuf         = vidioc_querybuf,
        .vidioc_qbuf             = vidioc_qbuf,
        .vidioc_dqbuf            = vidioc_dqbuf,
        .vidioc_streamon         = vidioc_streamon,
        .vidioc_streamoff        = vidioc_streamoff,
        .vidioc_g_ext_ctrls      = vidioc_g_ext_ctrls,
        .vidioc_s_ext_ctrls      = vidioc_s_ext_ctrls,
        .vidioc_try_ext_ctrls    = vidioc_try_ext_ctrls,
        .vidioc_log_status       = vidioc_log_status,
        .vidioc_querymenu        = vidioc_querymenu,
        .vidioc_queryctrl        = vidioc_queryctrl,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .vidioc_g_chip_info      = cx23885_g_chip_info,
        .vidioc_g_register       = cx23885_g_register,
        .vidioc_s_register       = cx23885_s_register,
#endif
};

static struct video_device cx23885_mpeg_template = {
        .name          = "cx23885",
        .fops          = &mpeg_fops,
        .ioctl_ops     = &mpeg_ioctl_ops,
        .tvnorms       = CX23885_NORMS,
};

void cx23885_417_unregister(struct cx23885_dev *dev)
{
        dprintk(1, "%s()\n", __func__);

        if (dev->v4l_device) {
                if (video_is_registered(dev->v4l_device))
                        video_unregister_device(dev->v4l_device);
                else
                        video_device_release(dev->v4l_device);
                dev->v4l_device = NULL;
        }
}

static struct video_device *cx23885_video_dev_alloc(
        struct cx23885_tsport *tsport,
        struct pci_dev *pci,
        struct video_device *template,
        char *type)
{
        struct video_device *vfd;
        struct cx23885_dev *dev = tsport->dev;

        dprintk(1, "%s()\n", __func__);

        vfd = video_device_alloc();
        if (NULL == vfd)
                return NULL;
        *vfd = *template;
        snprintf(vfd->name, sizeof(vfd->name), "%s (%s)",
                cx23885_boards[tsport->dev->board].name, type);
        vfd->v4l2_dev = &dev->v4l2_dev;
        vfd->release = video_device_release;
        return vfd;
}

int cx23885_417_register(struct cx23885_dev *dev)
{
        /* FIXME: Port1 hardcoded here */
        int err = -ENODEV;
        struct cx23885_tsport *tsport = &dev->ts1;

        dprintk(1, "%s()\n", __func__);

        if (cx23885_boards[dev->board].portb != CX23885_MPEG_ENCODER)
                return err;

        /* Set default TV standard */
        dev->encodernorm = cx23885_tvnorms[0];

        if (dev->encodernorm.id & V4L2_STD_525_60)
                tsport->height = 480;
        else
                tsport->height = 576;

        tsport->width = 720;
        cx2341x_fill_defaults(&dev->mpeg_params);

        dev->mpeg_params.port = CX2341X_PORT_SERIAL;

        /* Allocate and initialize V4L video device */
        dev->v4l_device = cx23885_video_dev_alloc(tsport,
                dev->pci, &cx23885_mpeg_template, "mpeg");
        video_set_drvdata(dev->v4l_device, dev);
        err = video_register_device(dev->v4l_device,
                VFL_TYPE_GRABBER, -1);
        if (err < 0) {
                printk(KERN_INFO "%s: can't register mpeg device\n", dev->name);
                return err;
        }

        printk(KERN_INFO "%s: registered device %s [mpeg]\n",
               dev->name, video_device_node_name(dev->v4l_device));

        /* ST: Configure the encoder paramaters, but don't begin
         * encoding, this resolves an issue where the first time the
         * encoder is started video can be choppy.
         */
        cx23885_initialize_codec(dev, 0);

        return 0;
}

MODULE_FIRMWARE(CX23885_FIRM_IMAGE_NAME);