/*
 *  cx18 ADEC audio functions
 *
 *  Derived from cx25840-core.c
 *
 *  Copyright (C) 2007  Hans Verkuil <hverkuil@xs4all.nl>
 *  Copyright (C) 2008  Andy Walls <awalls@radix.net>
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA
 *  02110-1301, USA.
 */

#include <media/v4l2-chip-ident.h>
#include "cx18-driver.h"
#include "cx18-io.h"
#include "cx18-cards.h"

int cx18_av_write(struct cx18 *cx, u16 addr, u8 value)
{
        u32 reg = 0xc40000 + (addr & ~3);
        u32 mask = 0xff;
        int shift = (addr & 3) * 8;
        u32 x = cx18_read_reg(cx, reg);

        x = (x & ~(mask << shift)) | ((u32)value << shift);
        cx18_write_reg(cx, x, reg);
        return 0;
}

int cx18_av_write_expect(struct cx18 *cx, u16 addr, u8 value, u8 eval, u8 mask)
{
        u32 reg = 0xc40000 + (addr & ~3);
        int shift = (addr & 3) * 8;
        u32 x = cx18_read_reg(cx, reg);

        x = (x & ~((u32)0xff << shift)) | ((u32)value << shift);
        cx18_write_reg_expect(cx, x, reg,
                                ((u32)eval << shift), ((u32)mask << shift));
        return 0;
}

int cx18_av_write4(struct cx18 *cx, u16 addr, u32 value)
{
        cx18_write_reg(cx, value, 0xc40000 + addr);
        return 0;
}

int
cx18_av_write4_expect(struct cx18 *cx, u16 addr, u32 value, u32 eval, u32 mask)
{
        cx18_write_reg_expect(cx, value, 0xc40000 + addr, eval, mask);
        return 0;
}

int cx18_av_write4_noretry(struct cx18 *cx, u16 addr, u32 value)
{
        cx18_write_reg_noretry(cx, value, 0xc40000 + addr);
        return 0;
}

u8 cx18_av_read(struct cx18 *cx, u16 addr)
{
        u32 x = cx18_read_reg(cx, 0xc40000 + (addr & ~3));
        int shift = (addr & 3) * 8;

        return (x >> shift) & 0xff;
}

u32 cx18_av_read4(struct cx18 *cx, u16 addr)
{
        return cx18_read_reg(cx, 0xc40000 + addr);
}

int cx18_av_and_or(struct cx18 *cx, u16 addr, unsigned and_mask,
                   u8 or_value)
{
        return cx18_av_write(cx, addr,
                             (cx18_av_read(cx, addr) & and_mask) |
                             or_value);
}

int cx18_av_and_or4(struct cx18 *cx, u16 addr, u32 and_mask,
                   u32 or_value)
{
        return cx18_av_write4(cx, addr,
                             (cx18_av_read4(cx, addr) & and_mask) |
                             or_value);
}

static int cx18_av_init(struct v4l2_subdev *sd, u32 val)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        /*
         * The crystal freq used in calculations in this driver will be
         * 28.636360 MHz.
         * Aim to run the PLLs' VCOs near 400 MHz to minimze errors.
         */

        /*
         * VDCLK  Integer = 0x0f, Post Divider = 0x04
         * AIMCLK Integer = 0x0e, Post Divider = 0x16
         */
        cx18_av_write4(cx, CXADEC_PLL_CTRL1, 0x160e040f);

        /* VDCLK Fraction = 0x2be2fe */
        /* xtal * 0xf.15f17f0/4 = 108 MHz: 432 MHz before post divide */
        cx18_av_write4(cx, CXADEC_VID_PLL_FRAC, 0x002be2fe);

        /* AIMCLK Fraction = 0x05227ad */
        /* xtal * 0xe.2913d68/0x16 = 48000 * 384: 406 MHz pre post-div*/
        cx18_av_write4(cx, CXADEC_AUX_PLL_FRAC, 0x005227ad);

        /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x16 */
        cx18_av_write(cx, CXADEC_I2S_MCLK, 0x56);
        return 0;
}

static void cx18_av_initialize(struct v4l2_subdev *sd)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        u32 v;

        cx18_av_loadfw(cx);
        /* Stop 8051 code execution */
        cx18_av_write4_expect(cx, CXADEC_DL_CTL, 0x03000000,
                                                 0x03000000, 0x13000000);

        /* initallize the PLL by toggling sleep bit */
        v = cx18_av_read4(cx, CXADEC_HOST_REG1);
        /* enable sleep mode - register appears to be read only... */
        cx18_av_write4_expect(cx, CXADEC_HOST_REG1, v | 1, v, 0xfffe);
        /* disable sleep mode */
        cx18_av_write4_expect(cx, CXADEC_HOST_REG1, v & 0xfffe,
                                                    v & 0xfffe, 0xffff);

        /* initialize DLLs */
        v = cx18_av_read4(cx, CXADEC_DLL1_DIAG_CTRL) & 0xE1FFFEFF;
        /* disable FLD */
        cx18_av_write4(cx, CXADEC_DLL1_DIAG_CTRL, v);
        /* enable FLD */
        cx18_av_write4(cx, CXADEC_DLL1_DIAG_CTRL, v | 0x10000100);

        v = cx18_av_read4(cx, CXADEC_DLL2_DIAG_CTRL) & 0xE1FFFEFF;
        /* disable FLD */
        cx18_av_write4(cx, CXADEC_DLL2_DIAG_CTRL, v);
        /* enable FLD */
        cx18_av_write4(cx, CXADEC_DLL2_DIAG_CTRL, v | 0x06000100);

        /* set analog bias currents. Set Vreg to 1.20V. */
        cx18_av_write4(cx, CXADEC_AFE_DIAG_CTRL1, 0x000A1802);

        v = cx18_av_read4(cx, CXADEC_AFE_DIAG_CTRL3) | 1;
        /* enable TUNE_FIL_RST */
        cx18_av_write4_expect(cx, CXADEC_AFE_DIAG_CTRL3, v, v, 0x03009F0F);
        /* disable TUNE_FIL_RST */
        cx18_av_write4_expect(cx, CXADEC_AFE_DIAG_CTRL3,
                              v & 0xFFFFFFFE, v & 0xFFFFFFFE, 0x03009F0F);

        /* enable 656 output */
        cx18_av_and_or4(cx, CXADEC_PIN_CTRL1, ~0, 0x040C00);

        /* video output drive strength */
        cx18_av_and_or4(cx, CXADEC_PIN_CTRL2, ~0, 0x2);

        /* reset video */
        cx18_av_write4(cx, CXADEC_SOFT_RST_CTRL, 0x8000);
        cx18_av_write4(cx, CXADEC_SOFT_RST_CTRL, 0);

        /*
         * Disable Video Auto-config of the Analog Front End and Video PLL.
         *
         * Since we only use BT.656 pixel mode, which works for both 525 and 625
         * line systems, it's just easier for us to set registers
         * 0x102 (CXADEC_CHIP_CTRL), 0x104-0x106 (CXADEC_AFE_CTRL),
         * 0x108-0x109 (CXADEC_PLL_CTRL1), and 0x10c-0x10f (CXADEC_VID_PLL_FRAC)
         * ourselves, than to run around cleaning up after the auto-config.
         *
         * (Note: my CX23418 chip doesn't seem to let the ACFG_DIS bit
         * get set to 1, but OTOH, it doesn't seem to do AFE and VID PLL
         * autoconfig either.)
         *
         * As a default, also turn off Dual mode for ADC2 and set ADC2 to CH3.
         */
        cx18_av_and_or4(cx, CXADEC_CHIP_CTRL, 0xFFFBFFFF, 0x00120000);

        /* Setup the Video and and Aux/Audio PLLs */
        cx18_av_init(sd, 0);

        /* set video to auto-detect */
        /* Clear bits 11-12 to enable slow locking mode.  Set autodetect mode */
        /* set the comb notch = 1 */
        cx18_av_and_or4(cx, CXADEC_MODE_CTRL, 0xFFF7E7F0, 0x02040800);

        /* Enable wtw_en in CRUSH_CTRL (Set bit 22) */
        /* Enable maj_sel in CRUSH_CTRL (Set bit 20) */
        cx18_av_and_or4(cx, CXADEC_CRUSH_CTRL, ~0, 0x00500000);

        /* Set VGA_TRACK_RANGE to 0x20 */
        cx18_av_and_or4(cx, CXADEC_DFE_CTRL2, 0xFFFF00FF, 0x00002000);

        /*
         * Initial VBI setup
         * VIP-1.1, 10 bit mode, enable Raw, disable sliced,
         * don't clamp raw samples when codes are in use, 1 byte user D-words,
         * IDID0 has line #, RP code V bit transition on VBLANK, data during
         * blanking intervals
         */
        cx18_av_write4(cx, CXADEC_OUT_CTRL1, 0x4013252e);

        /* Set the video input.
           The setting in MODE_CTRL gets lost when we do the above setup */
        /* EncSetSignalStd(dwDevNum, pEnc->dwSigStd); */
        /* EncSetVideoInput(dwDevNum, pEnc->VidIndSelection); */

        /*
         * Analog Front End (AFE)
         * Default to luma on ch1/ADC1, chroma on ch2/ADC2, SIF on ch3/ADC2
         *  bypass_ch[1-3]     use filter
         *  droop_comp_ch[1-3] disable
         *  clamp_en_ch[1-3]   disable
         *  aud_in_sel         ADC2
         *  luma_in_sel        ADC1
         *  chroma_in_sel      ADC2
         *  clamp_sel_ch[2-3]  midcode
         *  clamp_sel_ch1      video decoder
         *  vga_sel_ch3        audio decoder
         *  vga_sel_ch[1-2]    video decoder
         *  half_bw_ch[1-3]    disable
         *  +12db_ch[1-3]      disable
         */
        cx18_av_and_or4(cx, CXADEC_AFE_CTRL, 0xFF000000, 0x00005D00);

/*      if(dwEnable && dw3DCombAvailable) { */
/*              CxDevWrReg(CXADEC_SRC_COMB_CFG, 0x7728021F); */
/*    } else { */
/*              CxDevWrReg(CXADEC_SRC_COMB_CFG, 0x6628021F); */
/*    } */
        cx18_av_write4(cx, CXADEC_SRC_COMB_CFG, 0x6628021F);
        state->default_volume = 228 - cx18_av_read(cx, 0x8d4);
        state->default_volume = ((state->default_volume / 2) + 23) << 9;
}

static int cx18_av_reset(struct v4l2_subdev *sd, u32 val)
{
        cx18_av_initialize(sd);
        return 0;
}

static int cx18_av_load_fw(struct v4l2_subdev *sd)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);

        if (!state->is_initialized) {
                /* initialize on first use */
                state->is_initialized = 1;
                cx18_av_initialize(sd);
        }
        return 0;
}

void cx18_av_std_setup(struct cx18 *cx)
{
        struct cx18_av_state *state = &cx->av_state;
        struct v4l2_subdev *sd = &state->sd;
        v4l2_std_id std = state->std;

        /*
         * Video ADC crystal clock to pixel clock SRC decimation ratio
         * 28.636360 MHz/13.5 Mpps * 256 = 0x21f.07b
         */
        const int src_decimation = 0x21f;

        int hblank, hactive, burst, vblank, vactive, sc;
        int vblank656;
        int luma_lpf, uv_lpf, comb;
        u32 pll_int, pll_frac, pll_post;

        /* datasheet startup, step 8d */
        if (std & ~V4L2_STD_NTSC)
                cx18_av_write(cx, 0x49f, 0x11);
        else
                cx18_av_write(cx, 0x49f, 0x14);

        /*
         * Note: At the end of a field, there are 3 sets of half line duration
         * (double horizontal rate) pulses:
         *
         * 5 (625) or 6 (525) half-lines to blank for the vertical retrace
         * 5 (625) or 6 (525) vertical sync pulses of half line duration
         * 5 (625) or 6 (525) half-lines of equalization pulses
         */
        if (std & V4L2_STD_625_50) {
                /*
                 * The following relationships of half line counts should hold:
                 * 625 = vblank656 + vactive
                 * 10 = vblank656 - vblank = vsync pulses + equalization pulses
                 *
                 * vblank656: half lines after line 625/mid-313 of blanked video
                 * vblank:    half lines, after line 5/317, of blanked video
                 * vactive:   half lines of active video +
                 *              5 half lines after the end of active video
                 *
                 * As far as I can tell:
                 * vblank656 starts counting from the falling edge of the first
                 *      vsync pulse (start of line 1 or mid-313)
                 * vblank starts counting from the after the 5 vsync pulses and
                 *      5 or 4 equalization pulses (start of line 6 or 318)
                 *
                 * For 625 line systems the driver will extract VBI information
                 * from lines 6-23 and lines 318-335 (but the slicer can only
                 * handle 17 lines, not the 18 in the vblank region).
                 * In addition, we need vblank656 and vblank to be one whole
                 * line longer, to cover line 24 and 336, so the SAV/EAV RP
                 * codes get generated such that the encoder can actually
                 * extract line 23 & 335 (WSS).  We'll lose 1 line in each field
                 * at the top of the screen.
                 *
                 * It appears the 5 half lines that happen after active
                 * video must be included in vactive (579 instead of 574),
                 * otherwise the colors get badly displayed in various regions
                 * of the screen.  I guess the chroma comb filter gets confused
                 * without them (at least when a PVR-350 is the PAL source).
                 */
                vblank656 = 48; /* lines  1 -  24  &  313 - 336 */
                vblank = 38;    /* lines  6 -  24  &  318 - 336 */
                vactive = 579;  /* lines 24 - 313  &  337 - 626 */

                /*
                 * For a 13.5 Mpps clock and 15,625 Hz line rate, a line is
                 * is 864 pixels = 720 active + 144 blanking.  ITU-R BT.601
                 * specifies 12 luma clock periods or ~ 0.9 * 13.5 Mpps after
                 * the end of active video to start a horizontal line, so that
                 * leaves 132 pixels of hblank to ignore.
                 */
                hblank = 132;
                hactive = 720;

                /*
                 * Burst gate delay (for 625 line systems)
                 * Hsync leading edge to color burst rise = 5.6 us
                 * Color burst width = 2.25 us
                 * Gate width = 4 pixel clocks
                 * (5.6 us + 2.25/2 us) * 13.5 Mpps + 4/2 clocks = 92.79 clocks
                 */
                burst = 93;
                luma_lpf = 2;
                if (std & V4L2_STD_PAL) {
                        uv_lpf = 1;
                        comb = 0x20;
                        /* sc = 4433618.75 * src_decimation/28636360 * 2^13 */
                        sc = 688700;
                } else if (std == V4L2_STD_PAL_Nc) {
                        uv_lpf = 1;
                        comb = 0x20;
                        /* sc = 3582056.25 * src_decimation/28636360 * 2^13 */
                        sc = 556422;
                } else { /* SECAM */
                        uv_lpf = 0;
                        comb = 0;
                        /* (fr + fb)/2 = (4406260 + 4250000)/2 = 4328130 */
                        /* sc = 4328130 * src_decimation/28636360 * 2^13 */
                        sc = 672314;
                }
        } else {
                /*
                 * The following relationships of half line counts should hold:
                 * 525 = prevsync + vblank656 + vactive
                 * 12 = vblank656 - vblank = vsync pulses + equalization pulses
                 *
                 * prevsync:  6 half-lines before the vsync pulses
                 * vblank656: half lines, after line 3/mid-266, of blanked video
                 * vblank:    half lines, after line 9/272, of blanked video
                 * vactive:   half lines of active video
                 *
                 * As far as I can tell:
                 * vblank656 starts counting from the falling edge of the first
                 *      vsync pulse (start of line 4 or mid-266)
                 * vblank starts counting from the after the 6 vsync pulses and
                 *      6 or 5 equalization pulses (start of line 10 or 272)
                 *
                 * For 525 line systems the driver will extract VBI information
                 * from lines 10-21 and lines 273-284.
                 */
                vblank656 = 38; /* lines  4 -  22  &  266 - 284 */
                vblank = 26;    /* lines 10 -  22  &  272 - 284 */
                vactive = 481;  /* lines 23 - 263  &  285 - 525 */

                /*
                 * For a 13.5 Mpps clock and 15,734.26 Hz line rate, a line is
                 * is 858 pixels = 720 active + 138 blanking.  The Hsync leading
                 * edge should happen 1.2 us * 13.5 Mpps ~= 16 pixels after the
                 * end of active video, leaving 122 pixels of hblank to ignore
                 * before active video starts.
                 */
                hactive = 720;
                hblank = 122;
                luma_lpf = 1;
                uv_lpf = 1;

                /*
                 * Burst gate delay (for 525 line systems)
                 * Hsync leading edge to color burst rise = 5.3 us
                 * Color burst width = 2.5 us
                 * Gate width = 4 pixel clocks
                 * (5.3 us + 2.5/2 us) * 13.5 Mpps + 4/2 clocks = 90.425 clocks
                 */
                if (std == V4L2_STD_PAL_60) {
                        burst = 90;
                        luma_lpf = 2;
                        comb = 0x20;
                        /* sc = 4433618.75 * src_decimation/28636360 * 2^13 */
                        sc = 688700;
                } else if (std == V4L2_STD_PAL_M) {
                        /* The 97 needs to be verified against PAL-M timings */
                        burst = 97;
                        comb = 0x20;
                        /* sc = 3575611.49 * src_decimation/28636360 * 2^13 */
                        sc = 555421;
                } else {
                        burst = 90;
                        comb = 0x66;
                        /* sc = 3579545.45.. * src_decimation/28636360 * 2^13 */
                        sc = 556032;
                }
        }

        /* DEBUG: Displays configured PLL frequency */
        pll_int = cx18_av_read(cx, 0x108);
        pll_frac = cx18_av_read4(cx, 0x10c) & 0x1ffffff;
        pll_post = cx18_av_read(cx, 0x109);
        CX18_DEBUG_INFO_DEV(sd, "PLL regs = int: %u, frac: %u, post: %u\n",
                            pll_int, pll_frac, pll_post);

        if (pll_post) {
                int fsc, pll;
                u64 tmp;

                pll = (28636360L * ((((u64)pll_int) << 25) + pll_frac)) >> 25;
                pll /= pll_post;
                CX18_DEBUG_INFO_DEV(sd, "Video PLL = %d.%06d MHz\n",
                                    pll / 1000000, pll % 1000000);
                CX18_DEBUG_INFO_DEV(sd, "Pixel rate = %d.%06d Mpixel/sec\n",
                                    pll / 8000000, (pll / 8) % 1000000);

                CX18_DEBUG_INFO_DEV(sd, "ADC XTAL/pixel clock decimation ratio "
                                    "= %d.%03d\n", src_decimation / 256,
                                    ((src_decimation % 256) * 1000) / 256);

                tmp = 28636360 * (u64) sc;
                do_div(tmp, src_decimation);
                fsc = tmp >> 13;
                CX18_DEBUG_INFO_DEV(sd,
                                    "Chroma sub-carrier initial freq = %d.%06d "
                                    "MHz\n", fsc / 1000000, fsc % 1000000);

                CX18_DEBUG_INFO_DEV(sd, "hblank %i, hactive %i, vblank %i, "
                                    "vactive %i, vblank656 %i, src_dec %i, "
                                    "burst 0x%02x, luma_lpf %i, uv_lpf %i, "
                                    "comb 0x%02x, sc 0x%06x\n",
                                    hblank, hactive, vblank, vactive, vblank656,
                                    src_decimation, burst, luma_lpf, uv_lpf,
                                    comb, sc);
        }

        /* Sets horizontal blanking delay and active lines */
        cx18_av_write(cx, 0x470, hblank);
        cx18_av_write(cx, 0x471, 0xff & (((hblank >> 8) & 0x3) |
                                                (hactive << 4)));
        cx18_av_write(cx, 0x472, hactive >> 4);

        /* Sets burst gate delay */
        cx18_av_write(cx, 0x473, burst);

        /* Sets vertical blanking delay and active duration */
        cx18_av_write(cx, 0x474, vblank);
        cx18_av_write(cx, 0x475, 0xff & (((vblank >> 8) & 0x3) |
                                                (vactive << 4)));
        cx18_av_write(cx, 0x476, vactive >> 4);
        cx18_av_write(cx, 0x477, vblank656);

        /* Sets src decimation rate */
        cx18_av_write(cx, 0x478, 0xff & src_decimation);
        cx18_av_write(cx, 0x479, 0xff & (src_decimation >> 8));

        /* Sets Luma and UV Low pass filters */
        cx18_av_write(cx, 0x47a, luma_lpf << 6 | ((uv_lpf << 4) & 0x30));

        /* Enables comb filters */
        cx18_av_write(cx, 0x47b, comb);

        /* Sets SC Step*/
        cx18_av_write(cx, 0x47c, sc);
        cx18_av_write(cx, 0x47d, 0xff & sc >> 8);
        cx18_av_write(cx, 0x47e, 0xff & sc >> 16);

        if (std & V4L2_STD_625_50) {
                state->slicer_line_delay = 1;
                state->slicer_line_offset = (6 + state->slicer_line_delay - 2);
        } else {
                state->slicer_line_delay = 0;
                state->slicer_line_offset = (10 + state->slicer_line_delay - 2);
        }
        cx18_av_write(cx, 0x47f, state->slicer_line_delay);
}

static void input_change(struct cx18 *cx)
{
        struct cx18_av_state *state = &cx->av_state;
        v4l2_std_id std = state->std;
        u8 v;

        /* Follow step 8c and 8d of section 3.16 in the cx18_av datasheet */
        cx18_av_write(cx, 0x49f, (std & V4L2_STD_NTSC) ? 0x14 : 0x11);
        cx18_av_and_or(cx, 0x401, ~0x60, 0);
        cx18_av_and_or(cx, 0x401, ~0x60, 0x60);

        if (std & V4L2_STD_525_60) {
                if (std == V4L2_STD_NTSC_M_JP) {
                        /* Japan uses EIAJ audio standard */
                        cx18_av_write_expect(cx, 0x808, 0xf7, 0xf7, 0xff);
                        cx18_av_write_expect(cx, 0x80b, 0x02, 0x02, 0x3f);
                } else if (std == V4L2_STD_NTSC_M_KR) {
                        /* South Korea uses A2 audio standard */
                        cx18_av_write_expect(cx, 0x808, 0xf8, 0xf8, 0xff);
                        cx18_av_write_expect(cx, 0x80b, 0x03, 0x03, 0x3f);
                } else {
                        /* Others use the BTSC audio standard */
                        cx18_av_write_expect(cx, 0x808, 0xf6, 0xf6, 0xff);
                        cx18_av_write_expect(cx, 0x80b, 0x01, 0x01, 0x3f);
                }
        } else if (std & V4L2_STD_PAL) {
                /* Follow tuner change procedure for PAL */
                cx18_av_write_expect(cx, 0x808, 0xff, 0xff, 0xff);
                cx18_av_write_expect(cx, 0x80b, 0x03, 0x03, 0x3f);
        } else if (std & V4L2_STD_SECAM) {
                /* Select autodetect for SECAM */
                cx18_av_write_expect(cx, 0x808, 0xff, 0xff, 0xff);
                cx18_av_write_expect(cx, 0x80b, 0x03, 0x03, 0x3f);
        }

        v = cx18_av_read(cx, 0x803);
        if (v & 0x10) {
                /* restart audio decoder microcontroller */
                v &= ~0x10;
                cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
                v |= 0x10;
                cx18_av_write_expect(cx, 0x803, v, v, 0x1f);
        }
}

static int cx18_av_s_frequency(struct v4l2_subdev *sd,
                               struct v4l2_frequency *freq)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        input_change(cx);
        return 0;
}

static int set_input(struct cx18 *cx, enum cx18_av_video_input vid_input,
                                        enum cx18_av_audio_input aud_input)
{
        struct cx18_av_state *state = &cx->av_state;
        struct v4l2_subdev *sd = &state->sd;

        enum analog_signal_type {
                NONE, CVBS, Y, C, SIF, Pb, Pr
        } ch[3] = {NONE, NONE, NONE};

        u8 afe_mux_cfg;
        u8 adc2_cfg;
        u32 afe_cfg;
        int i;

        CX18_DEBUG_INFO_DEV(sd, "decoder set video input %d, audio input %d\n",
                            vid_input, aud_input);

        if (vid_input >= CX18_AV_COMPOSITE1 &&
            vid_input <= CX18_AV_COMPOSITE8) {
                afe_mux_cfg = 0xf0 + (vid_input - CX18_AV_COMPOSITE1);
                ch[0] = CVBS;
        } else {
                int luma = vid_input & 0xf0;
                int chroma = vid_input & 0xf00;

                if ((vid_input & ~0xff0) ||
                    luma < CX18_AV_SVIDEO_LUMA1 ||
                    luma > CX18_AV_SVIDEO_LUMA8 ||
                    chroma < CX18_AV_SVIDEO_CHROMA4 ||
                    chroma > CX18_AV_SVIDEO_CHROMA8) {
                        CX18_ERR_DEV(sd, "0x%04x is not a valid video input!\n",
                                     vid_input);
                        return -EINVAL;
                }
                afe_mux_cfg = 0xf0 + ((luma - CX18_AV_SVIDEO_LUMA1) >> 4);
                ch[0] = Y;
                if (chroma >= CX18_AV_SVIDEO_CHROMA7) {
                        afe_mux_cfg &= 0x3f;
                        afe_mux_cfg |= (chroma - CX18_AV_SVIDEO_CHROMA7) >> 2;
                        ch[2] = C;
                } else {
                        afe_mux_cfg &= 0xcf;
                        afe_mux_cfg |= (chroma - CX18_AV_SVIDEO_CHROMA4) >> 4;
                        ch[1] = C;
                }
        }
        /* TODO: LeadTek WinFast DVR3100 H & WinFast PVR2100 can do Y/Pb/Pr */

        switch (aud_input) {
        case CX18_AV_AUDIO_SERIAL1:
        case CX18_AV_AUDIO_SERIAL2:
                /* do nothing, use serial audio input */
                break;
        case CX18_AV_AUDIO4:
                afe_mux_cfg &= ~0x30;
                ch[1] = SIF;
                break;
        case CX18_AV_AUDIO5:
                afe_mux_cfg = (afe_mux_cfg & ~0x30) | 0x10;
                ch[1] = SIF;
                break;
        case CX18_AV_AUDIO6:
                afe_mux_cfg = (afe_mux_cfg & ~0x30) | 0x20;
                ch[1] = SIF;
                break;
        case CX18_AV_AUDIO7:
                afe_mux_cfg &= ~0xc0;
                ch[2] = SIF;
                break;
        case CX18_AV_AUDIO8:
                afe_mux_cfg = (afe_mux_cfg & ~0xc0) | 0x40;
                ch[2] = SIF;
                break;

        default:
                CX18_ERR_DEV(sd, "0x%04x is not a valid audio input!\n",
                             aud_input);
                return -EINVAL;
        }

        /* Set up analog front end multiplexers */
        cx18_av_write_expect(cx, 0x103, afe_mux_cfg, afe_mux_cfg, 0xf7);
        /* Set INPUT_MODE to Composite (0) or S-Video (1) */
        cx18_av_and_or(cx, 0x401, ~0x6, ch[0] == CVBS ? 0 : 0x02);

        /* Set CH_SEL_ADC2 to 1 if input comes from CH3 */
        adc2_cfg = cx18_av_read(cx, 0x102);
        if (ch[2] == NONE)
                adc2_cfg &= ~0x2; /* No sig on CH3, set ADC2 to CH2 for input */
        else
                adc2_cfg |= 0x2;  /* Signal on CH3, set ADC2 to CH3 for input */

        /* Set DUAL_MODE_ADC2 to 1 if input comes from both CH2 and CH3 */
        if (ch[1] != NONE && ch[2] != NONE)
                adc2_cfg |= 0x4; /* Set dual mode */
        else
                adc2_cfg &= ~0x4; /* Clear dual mode */
        cx18_av_write_expect(cx, 0x102, adc2_cfg, adc2_cfg, 0x17);

        /* Configure the analog front end */
        afe_cfg = cx18_av_read4(cx, CXADEC_AFE_CTRL);
        afe_cfg &= 0xff000000;
        afe_cfg |= 0x00005000; /* CHROMA_IN, AUD_IN: ADC2; LUMA_IN: ADC1 */
        if (ch[1] != NONE && ch[2] != NONE)
                afe_cfg |= 0x00000030; /* half_bw_ch[2-3] since in dual mode */

        for (i = 0; i < 3; i++) {
                switch (ch[i]) {
                default:
                case NONE:
                        /* CLAMP_SEL = Fixed to midcode clamp level */
                        afe_cfg |= (0x00000200 << i);
                        break;
                case CVBS:
                case Y:
                        if (i > 0)
                                afe_cfg |= 0x00002000; /* LUMA_IN_SEL: ADC2 */
                        break;
                case C:
                case Pb:
                case Pr:
                        /* CLAMP_SEL = Fixed to midcode clamp level */
                        afe_cfg |= (0x00000200 << i);
                        if (i == 0 && ch[i] == C)
                                afe_cfg &= ~0x00001000; /* CHROMA_IN_SEL ADC1 */
                        break;
                case SIF:
                        /*
                         * VGA_GAIN_SEL = Audio Decoder
                         * CLAMP_SEL = Fixed to midcode clamp level
                         */
                        afe_cfg |= (0x00000240 << i);
                        if (i == 0)
                                afe_cfg &= ~0x00004000; /* AUD_IN_SEL ADC1 */
                        break;
                }
        }

        cx18_av_write4(cx, CXADEC_AFE_CTRL, afe_cfg);

        state->vid_input = vid_input;
        state->aud_input = aud_input;
        cx18_av_audio_set_path(cx);
        input_change(cx);
        return 0;
}

static int cx18_av_s_video_routing(struct v4l2_subdev *sd,
                                   u32 input, u32 output, u32 config)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        return set_input(cx, input, state->aud_input);
}

static int cx18_av_s_audio_routing(struct v4l2_subdev *sd,
                                   u32 input, u32 output, u32 config)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        return set_input(cx, state->vid_input, input);
}

static int cx18_av_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        u8 vpres;
        u8 mode;
        int val = 0;

        if (state->radio)
                return 0;

        vpres = cx18_av_read(cx, 0x40e) & 0x20;
        vt->signal = vpres ? 0xffff : 0x0;

        vt->capability |=
                    V4L2_TUNER_CAP_STEREO | V4L2_TUNER_CAP_LANG1 |
                    V4L2_TUNER_CAP_LANG2 | V4L2_TUNER_CAP_SAP;

        mode = cx18_av_read(cx, 0x804);

        /* get rxsubchans and audmode */
        if ((mode & 0xf) == 1)
                val |= V4L2_TUNER_SUB_STEREO;
        else
                val |= V4L2_TUNER_SUB_MONO;

        if (mode == 2 || mode == 4)
                val = V4L2_TUNER_SUB_LANG1 | V4L2_TUNER_SUB_LANG2;

        if (mode & 0x10)
                val |= V4L2_TUNER_SUB_SAP;

        vt->rxsubchans = val;
        vt->audmode = state->audmode;
        return 0;
}

static int cx18_av_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        u8 v;

        if (state->radio)
                return 0;

        v = cx18_av_read(cx, 0x809);
        v &= ~0xf;

        switch (vt->audmode) {
        case V4L2_TUNER_MODE_MONO:
                /* mono      -> mono
                   stereo    -> mono
                   bilingual -> lang1 */
                break;
        case V4L2_TUNER_MODE_STEREO:
        case V4L2_TUNER_MODE_LANG1:
                /* mono      -> mono
                   stereo    -> stereo
                   bilingual -> lang1 */
                v |= 0x4;
                break;
        case V4L2_TUNER_MODE_LANG1_LANG2:
                /* mono      -> mono
                   stereo    -> stereo
                   bilingual -> lang1/lang2 */
                v |= 0x7;
                break;
        case V4L2_TUNER_MODE_LANG2:
                /* mono      -> mono
                   stereo    -> stereo
                   bilingual -> lang2 */
                v |= 0x1;
                break;
        default:
                return -EINVAL;
        }
        cx18_av_write_expect(cx, 0x809, v, v, 0xff);
        state->audmode = vt->audmode;
        return 0;
}

static int cx18_av_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        u8 fmt = 0;     /* zero is autodetect */
        u8 pal_m = 0;

        if (state->radio == 0 && state->std == norm)
                return 0;

        state->radio = 0;
        state->std = norm;

        /* First tests should be against specific std */
        if (state->std == V4L2_STD_NTSC_M_JP) {
                fmt = 0x2;
        } else if (state->std == V4L2_STD_NTSC_443) {
                fmt = 0x3;
        } else if (state->std == V4L2_STD_PAL_M) {
                pal_m = 1;
                fmt = 0x5;
        } else if (state->std == V4L2_STD_PAL_N) {
                fmt = 0x6;
        } else if (state->std == V4L2_STD_PAL_Nc) {
                fmt = 0x7;
        } else if (state->std == V4L2_STD_PAL_60) {
                fmt = 0x8;
        } else {
                /* Then, test against generic ones */
                if (state->std & V4L2_STD_NTSC)
                        fmt = 0x1;
                else if (state->std & V4L2_STD_PAL)
                        fmt = 0x4;
                else if (state->std & V4L2_STD_SECAM)
                        fmt = 0xc;
        }

        CX18_DEBUG_INFO_DEV(sd, "changing video std to fmt %i\n", fmt);

        /* Follow step 9 of section 3.16 in the cx18_av datasheet.
           Without this PAL may display a vertical ghosting effect.
           This happens for example with the Yuan MPC622. */
        if (fmt >= 4 && fmt < 8) {
                /* Set format to NTSC-M */
                cx18_av_and_or(cx, 0x400, ~0xf, 1);
                /* Turn off LCOMB */
                cx18_av_and_or(cx, 0x47b, ~6, 0);
        }
        cx18_av_and_or(cx, 0x400, ~0x2f, fmt | 0x20);
        cx18_av_and_or(cx, 0x403, ~0x3, pal_m);
        cx18_av_std_setup(cx);
        input_change(cx);
        return 0;
}

static int cx18_av_s_radio(struct v4l2_subdev *sd)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        state->radio = 1;
        return 0;
}

static int cx18_av_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                if (ctrl->value < 0 || ctrl->value > 255) {
                        CX18_ERR_DEV(sd, "invalid brightness setting %d\n",
                                     ctrl->value);
                        return -ERANGE;
                }

                cx18_av_write(cx, 0x414, ctrl->value - 128);
                break;

        case V4L2_CID_CONTRAST:
                if (ctrl->value < 0 || ctrl->value > 127) {
                        CX18_ERR_DEV(sd, "invalid contrast setting %d\n",
                                     ctrl->value);
                        return -ERANGE;
                }

                cx18_av_write(cx, 0x415, ctrl->value << 1);
                break;

        case V4L2_CID_SATURATION:
                if (ctrl->value < 0 || ctrl->value > 127) {
                        CX18_ERR_DEV(sd, "invalid saturation setting %d\n",
                                     ctrl->value);
                        return -ERANGE;
                }

                cx18_av_write(cx, 0x420, ctrl->value << 1);
                cx18_av_write(cx, 0x421, ctrl->value << 1);
                break;

        case V4L2_CID_HUE:
                if (ctrl->value < -128 || ctrl->value > 127) {
                        CX18_ERR_DEV(sd, "invalid hue setting %d\n",
                                     ctrl->value);
                        return -ERANGE;
                }

                cx18_av_write(cx, 0x422, ctrl->value);
                break;

        case V4L2_CID_AUDIO_VOLUME:
        case V4L2_CID_AUDIO_BASS:
        case V4L2_CID_AUDIO_TREBLE:
        case V4L2_CID_AUDIO_BALANCE:
        case V4L2_CID_AUDIO_MUTE:
                return cx18_av_audio_s_ctrl(cx, ctrl);

        default:
                return -EINVAL;
        }
        return 0;
}

static int cx18_av_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        switch (ctrl->id) {
        case V4L2_CID_BRIGHTNESS:
                ctrl->value = (s8)cx18_av_read(cx, 0x414) + 128;
                break;
        case V4L2_CID_CONTRAST:
                ctrl->value = cx18_av_read(cx, 0x415) >> 1;
                break;
        case V4L2_CID_SATURATION:
                ctrl->value = cx18_av_read(cx, 0x420) >> 1;
                break;
        case V4L2_CID_HUE:
                ctrl->value = (s8)cx18_av_read(cx, 0x422);
                break;
        case V4L2_CID_AUDIO_VOLUME:
        case V4L2_CID_AUDIO_BASS:
        case V4L2_CID_AUDIO_TREBLE:
        case V4L2_CID_AUDIO_BALANCE:
        case V4L2_CID_AUDIO_MUTE:
                return cx18_av_audio_g_ctrl(cx, ctrl);
        default:
                return -EINVAL;
        }
        return 0;
}

static int cx18_av_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *qc)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);

        switch (qc->id) {
        case V4L2_CID_BRIGHTNESS:
                return v4l2_ctrl_query_fill(qc, 0, 255, 1, 128);
        case V4L2_CID_CONTRAST:
        case V4L2_CID_SATURATION:
                return v4l2_ctrl_query_fill(qc, 0, 127, 1, 64);
        case V4L2_CID_HUE:
                return v4l2_ctrl_query_fill(qc, -128, 127, 1, 0);
        default:
                break;
        }

        switch (qc->id) {
        case V4L2_CID_AUDIO_VOLUME:
                return v4l2_ctrl_query_fill(qc, 0, 65535,
                        65535 / 100, state->default_volume);
        case V4L2_CID_AUDIO_MUTE:
                return v4l2_ctrl_query_fill(qc, 0, 1, 1, 0);
        case V4L2_CID_AUDIO_BALANCE:
        case V4L2_CID_AUDIO_BASS:
        case V4L2_CID_AUDIO_TREBLE:
                return v4l2_ctrl_query_fill(qc, 0, 65535, 65535 / 100, 32768);
        default:
                return -EINVAL;
        }
        return -EINVAL;
}

static int cx18_av_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        return cx18_av_vbi_g_fmt(cx, fmt);
}

static int cx18_av_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        struct v4l2_pix_format *pix;
        int HSC, VSC, Vsrc, Hsrc, filter, Vlines;
        int is_50Hz = !(state->std & V4L2_STD_525_60);

        switch (fmt->type) {
        case V4L2_BUF_TYPE_VIDEO_CAPTURE:
                pix = &(fmt->fmt.pix);

                Vsrc = (cx18_av_read(cx, 0x476) & 0x3f) << 4;
                Vsrc |= (cx18_av_read(cx, 0x475) & 0xf0) >> 4;

                Hsrc = (cx18_av_read(cx, 0x472) & 0x3f) << 4;
                Hsrc |= (cx18_av_read(cx, 0x471) & 0xf0) >> 4;

                /*
                 * This adjustment reflects the excess of vactive, set in
                 * cx18_av_std_setup(), above standard values:
                 *
                 * 480 + 1 for 60 Hz systems
                 * 576 + 3 for 50 Hz systems
                 */
                Vlines = pix->height + (is_50Hz ? 3 : 1);

                /*
                 * Invalid height and width scaling requests are:
                 * 1. width less than 1/16 of the source width
                 * 2. width greater than the source width
                 * 3. height less than 1/8 of the source height
                 * 4. height greater than the source height
                 */
                if ((pix->width * 16 < Hsrc) || (Hsrc < pix->width) ||
                    (Vlines * 8 < Vsrc) || (Vsrc < Vlines)) {
                        CX18_ERR_DEV(sd, "%dx%d is not a valid size!\n",
                                     pix->width, pix->height);
                        return -ERANGE;
                }

                HSC = (Hsrc * (1 << 20)) / pix->width - (1 << 20);
                VSC = (1 << 16) - (Vsrc * (1 << 9) / Vlines - (1 << 9));
                VSC &= 0x1fff;

                if (pix->width >= 385)
                        filter = 0;
                else if (pix->width > 192)
                        filter = 1;
                else if (pix->width > 96)
                        filter = 2;
                else
                        filter = 3;

                CX18_DEBUG_INFO_DEV(sd,
                                    "decoder set size %dx%d -> scale  %ux%u\n",
                                    pix->width, pix->height, HSC, VSC);

                /* HSCALE=HSC */
                cx18_av_write(cx, 0x418, HSC & 0xff);
                cx18_av_write(cx, 0x419, (HSC >> 8) & 0xff);
                cx18_av_write(cx, 0x41a, HSC >> 16);
                /* VSCALE=VSC */
                cx18_av_write(cx, 0x41c, VSC & 0xff);
                cx18_av_write(cx, 0x41d, VSC >> 8);
                /* VS_INTRLACE=1 VFILT=filter */
                cx18_av_write(cx, 0x41e, 0x8 | filter);
                break;

        case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
                return cx18_av_vbi_s_fmt(cx, fmt);

        case V4L2_BUF_TYPE_VBI_CAPTURE:
                return cx18_av_vbi_s_fmt(cx, fmt);

        default:
                return -EINVAL;
        }
        return 0;
}

static int cx18_av_s_stream(struct v4l2_subdev *sd, int enable)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        CX18_DEBUG_INFO_DEV(sd, "%s output\n", enable ? "enable" : "disable");
        if (enable) {
                cx18_av_write(cx, 0x115, 0x8c);
                cx18_av_write(cx, 0x116, 0x07);
        } else {
                cx18_av_write(cx, 0x115, 0x00);
                cx18_av_write(cx, 0x116, 0x00);
        }
        return 0;
}

static void log_video_status(struct cx18 *cx)
{
        static const char *const fmt_strs[] = {
                "0x0",
                "NTSC-M", "NTSC-J", "NTSC-4.43",
                "PAL-BDGHI", "PAL-M", "PAL-N", "PAL-Nc", "PAL-60",
                "0x9", "0xA", "0xB",
                "SECAM",
                "0xD", "0xE", "0xF"
        };

        struct cx18_av_state *state = &cx->av_state;
        struct v4l2_subdev *sd = &state->sd;
        u8 vidfmt_sel = cx18_av_read(cx, 0x400) & 0xf;
        u8 gen_stat1 = cx18_av_read(cx, 0x40d);
        u8 gen_stat2 = cx18_av_read(cx, 0x40e);
        int vid_input = state->vid_input;

        CX18_INFO_DEV(sd, "Video signal:              %spresent\n",
                      (gen_stat2 & 0x20) ? "" : "not ");
        CX18_INFO_DEV(sd, "Detected format:           %s\n",
                      fmt_strs[gen_stat1 & 0xf]);

        CX18_INFO_DEV(sd, "Specified standard:        %s\n",
                      vidfmt_sel ? fmt_strs[vidfmt_sel]
                                 : "automatic detection");

        if (vid_input >= CX18_AV_COMPOSITE1 &&
            vid_input <= CX18_AV_COMPOSITE8) {
                CX18_INFO_DEV(sd, "Specified video input:     Composite %d\n",
                              vid_input - CX18_AV_COMPOSITE1 + 1);
        } else {
                CX18_INFO_DEV(sd, "Specified video input:     "
                              "S-Video (Luma In%d, Chroma In%d)\n",
                              (vid_input & 0xf0) >> 4,
                              (vid_input & 0xf00) >> 8);
        }

        CX18_INFO_DEV(sd, "Specified audioclock freq: %d Hz\n",
                      state->audclk_freq);
}

static void log_audio_status(struct cx18 *cx)
{
        struct cx18_av_state *state = &cx->av_state;
        struct v4l2_subdev *sd = &state->sd;
        u8 download_ctl = cx18_av_read(cx, 0x803);
        u8 mod_det_stat0 = cx18_av_read(cx, 0x804);
        u8 mod_det_stat1 = cx18_av_read(cx, 0x805);
        u8 audio_config = cx18_av_read(cx, 0x808);
        u8 pref_mode = cx18_av_read(cx, 0x809);
        u8 afc0 = cx18_av_read(cx, 0x80b);
        u8 mute_ctl = cx18_av_read(cx, 0x8d3);
        int aud_input = state->aud_input;
        char *p;

        switch (mod_det_stat0) {
        case 0x00: p = "mono"; break;
        case 0x01: p = "stereo"; break;
        case 0x02: p = "dual"; break;
        case 0x04: p = "tri"; break;
        case 0x10: p = "mono with SAP"; break;
        case 0x11: p = "stereo with SAP"; break;
        case 0x12: p = "dual with SAP"; break;
        case 0x14: p = "tri with SAP"; break;
        case 0xfe: p = "forced mode"; break;
        default: p = "not defined"; break;
        }
        CX18_INFO_DEV(sd, "Detected audio mode:       %s\n", p);

        switch (mod_det_stat1) {
        case 0x00: p = "not defined"; break;
        case 0x01: p = "EIAJ"; break;
        case 0x02: p = "A2-M"; break;
        case 0x03: p = "A2-BG"; break;
        case 0x04: p = "A2-DK1"; break;
        case 0x05: p = "A2-DK2"; break;
        case 0x06: p = "A2-DK3"; break;
        case 0x07: p = "A1 (6.0 MHz FM Mono)"; break;
        case 0x08: p = "AM-L"; break;
        case 0x09: p = "NICAM-BG"; break;
        case 0x0a: p = "NICAM-DK"; break;
        case 0x0b: p = "NICAM-I"; break;
        case 0x0c: p = "NICAM-L"; break;
        case 0x0d: p = "BTSC/EIAJ/A2-M Mono (4.5 MHz FMMono)"; break;
        case 0x0e: p = "IF FM Radio"; break;
        case 0x0f: p = "BTSC"; break;
        case 0x10: p = "detected chrominance"; break;
        case 0xfd: p = "unknown audio standard"; break;
        case 0xfe: p = "forced audio standard"; break;
        case 0xff: p = "no detected audio standard"; break;
        default: p = "not defined"; break;
        }
        CX18_INFO_DEV(sd, "Detected audio standard:   %s\n", p);
        CX18_INFO_DEV(sd, "Audio muted:               %s\n",
                      (mute_ctl & 0x2) ? "yes" : "no");
        CX18_INFO_DEV(sd, "Audio microcontroller:     %s\n",
                      (download_ctl & 0x10) ? "running" : "stopped");

        switch (audio_config >> 4) {
        case 0x00: p = "undefined"; break;
        case 0x01: p = "BTSC"; break;
        case 0x02: p = "EIAJ"; break;
        case 0x03: p = "A2-M"; break;
        case 0x04: p = "A2-BG"; break;
        case 0x05: p = "A2-DK1"; break;
        case 0x06: p = "A2-DK2"; break;
        case 0x07: p = "A2-DK3"; break;
        case 0x08: p = "A1 (6.0 MHz FM Mono)"; break;
        case 0x09: p = "AM-L"; break;
        case 0x0a: p = "NICAM-BG"; break;
        case 0x0b: p = "NICAM-DK"; break;
        case 0x0c: p = "NICAM-I"; break;
        case 0x0d: p = "NICAM-L"; break;
        case 0x0e: p = "FM radio"; break;
        case 0x0f: p = "automatic detection"; break;
        default: p = "undefined"; break;
        }
        CX18_INFO_DEV(sd, "Configured audio standard: %s\n", p);

        if ((audio_config >> 4) < 0xF) {
                switch (audio_config & 0xF) {
                case 0x00: p = "MONO1 (LANGUAGE A/Mono L+R channel for BTSC, EIAJ, A2)"; break;
                case 0x01: p = "MONO2 (LANGUAGE B)"; break;
                case 0x02: p = "MONO3 (STEREO forced MONO)"; break;
                case 0x03: p = "MONO4 (NICAM ANALOG-Language C/Analog Fallback)"; break;
                case 0x04: p = "STEREO"; break;
                case 0x05: p = "DUAL1 (AC)"; break;
                case 0x06: p = "DUAL2 (BC)"; break;
                case 0x07: p = "DUAL3 (AB)"; break;
                default: p = "undefined";
                }
                CX18_INFO_DEV(sd, "Configured audio mode:     %s\n", p);
        } else {
                switch (audio_config & 0xF) {
                case 0x00: p = "BG"; break;
                case 0x01: p = "DK1"; break;
                case 0x02: p = "DK2"; break;
                case 0x03: p = "DK3"; break;
                case 0x04: p = "I"; break;
                case 0x05: p = "L"; break;
                case 0x06: p = "BTSC"; break;
                case 0x07: p = "EIAJ"; break;
                case 0x08: p = "A2-M"; break;
                case 0x09: p = "FM Radio (4.5 MHz)"; break;
                case 0x0a: p = "FM Radio (5.5 MHz)"; break;
                case 0x0b: p = "S-Video"; break;
                case 0x0f: p = "automatic standard and mode detection"; break;
                default: p = "undefined"; break;
                }
                CX18_INFO_DEV(sd, "Configured audio system:   %s\n", p);
        }

        if (aud_input)
                CX18_INFO_DEV(sd, "Specified audio input:     Tuner (In%d)\n",
                              aud_input);
        else
                CX18_INFO_DEV(sd, "Specified audio input:     External\n");

        switch (pref_mode & 0xf) {
        case 0: p = "mono/language A"; break;
        case 1: p = "language B"; break;
        case 2: p = "language C"; break;
        case 3: p = "analog fallback"; break;
        case 4: p = "stereo"; break;
        case 5: p = "language AC"; break;
        case 6: p = "language BC"; break;
        case 7: p = "language AB"; break;
        default: p = "undefined"; break;
        }
        CX18_INFO_DEV(sd, "Preferred audio mode:      %s\n", p);

        if ((audio_config & 0xf) == 0xf) {
                switch ((afc0 >> 3) & 0x1) {
                case 0: p = "system DK"; break;
                case 1: p = "system L"; break;
                }
                CX18_INFO_DEV(sd, "Selected 65 MHz format:    %s\n", p);

                switch (afc0 & 0x7) {
                case 0: p = "Chroma"; break;
                case 1: p = "BTSC"; break;
                case 2: p = "EIAJ"; break;
                case 3: p = "A2-M"; break;
                case 4: p = "autodetect"; break;
                default: p = "undefined"; break;
                }
                CX18_INFO_DEV(sd, "Selected 45 MHz format:    %s\n", p);
        }
}

static int cx18_av_log_status(struct v4l2_subdev *sd)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);
        log_video_status(cx);
        log_audio_status(cx);
        return 0;
}

static inline int cx18_av_dbg_match(const struct v4l2_dbg_match *match)
{
        return match->type == V4L2_CHIP_MATCH_HOST && match->addr == 1;
}

static int cx18_av_g_chip_ident(struct v4l2_subdev *sd,
                                struct v4l2_dbg_chip_ident *chip)
{
        struct cx18_av_state *state = to_cx18_av_state(sd);

        if (cx18_av_dbg_match(&chip->match)) {
                chip->ident = state->id;
                chip->revision = state->rev;
        }
        return 0;
}

#ifdef CONFIG_VIDEO_ADV_DEBUG
static int cx18_av_g_register(struct v4l2_subdev *sd,
                              struct v4l2_dbg_register *reg)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        if (!cx18_av_dbg_match(&reg->match))
                return -EINVAL;
        if ((reg->reg & 0x3) != 0)
                return -EINVAL;
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
        reg->size = 4;
        reg->val = cx18_av_read4(cx, reg->reg & 0x00000ffc);
        return 0;
}

static int cx18_av_s_register(struct v4l2_subdev *sd,
                              struct v4l2_dbg_register *reg)
{
        struct cx18 *cx = v4l2_get_subdevdata(sd);

        if (!cx18_av_dbg_match(&reg->match))
                return -EINVAL;
        if ((reg->reg & 0x3) != 0)
                return -EINVAL;
        if (!capable(CAP_SYS_ADMIN))
                return -EPERM;
        cx18_av_write4(cx, reg->reg & 0x00000ffc, reg->val);
        return 0;
}
#endif

static const struct v4l2_subdev_core_ops cx18_av_general_ops = {
        .g_chip_ident = cx18_av_g_chip_ident,
        .log_status = cx18_av_log_status,
        .init = cx18_av_init,
        .load_fw = cx18_av_load_fw,
        .reset = cx18_av_reset,
        .queryctrl = cx18_av_queryctrl,
        .g_ctrl = cx18_av_g_ctrl,
        .s_ctrl = cx18_av_s_ctrl,
        .s_std = cx18_av_s_std,
#ifdef CONFIG_VIDEO_ADV_DEBUG
        .g_register = cx18_av_g_register,
        .s_register = cx18_av_s_register,
#endif
};

static const struct v4l2_subdev_tuner_ops cx18_av_tuner_ops = {
        .s_radio = cx18_av_s_radio,
        .s_frequency = cx18_av_s_frequency,
        .g_tuner = cx18_av_g_tuner,
        .s_tuner = cx18_av_s_tuner,
};

static const struct v4l2_subdev_audio_ops cx18_av_audio_ops = {
        .s_clock_freq = cx18_av_s_clock_freq,
        .s_routing = cx18_av_s_audio_routing,
};

static const struct v4l2_subdev_video_ops cx18_av_video_ops = {
        .s_routing = cx18_av_s_video_routing,
        .decode_vbi_line = cx18_av_decode_vbi_line,
        .s_stream = cx18_av_s_stream,
        .g_fmt = cx18_av_g_fmt,
        .s_fmt = cx18_av_s_fmt,
};

static const struct v4l2_subdev_ops cx18_av_ops = {
        .core = &cx18_av_general_ops,
        .tuner = &cx18_av_tuner_ops,
        .audio = &cx18_av_audio_ops,
        .video = &cx18_av_video_ops,
};

int cx18_av_probe(struct cx18 *cx)
{
        struct cx18_av_state *state = &cx->av_state;
        struct v4l2_subdev *sd;

        state->rev = cx18_av_read4(cx, CXADEC_CHIP_CTRL) & 0xffff;
        state->id = ((state->rev >> 4) == CXADEC_CHIP_TYPE_MAKO)
                    ? V4L2_IDENT_CX23418_843 : V4L2_IDENT_UNKNOWN;

        state->vid_input = CX18_AV_COMPOSITE7;
        state->aud_input = CX18_AV_AUDIO8;
        state->audclk_freq = 48000;
        state->audmode = V4L2_TUNER_MODE_LANG1;
        state->slicer_line_delay = 0;
        state->slicer_line_offset = (10 + state->slicer_line_delay - 2);

        sd = &state->sd;
        v4l2_subdev_init(sd, &cx18_av_ops);
        v4l2_set_subdevdata(sd, cx);
        snprintf(sd->name, sizeof(sd->name),
                 "%s %03x", cx->v4l2_dev.name, (state->rev >> 4));
        sd->grp_id = CX18_HW_418_AV;
        return v4l2_device_register_subdev(&cx->v4l2_dev, sd);
}