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ks0127.c

/*
 * Video Capture Driver (Video for Linux 1/2)
 * for the Matrox Marvel G200,G400 and Rainbow Runner-G series
 *
 * This module is an interface to the KS0127 video decoder chip.
 *
 * Copyright (C) 1999  Ryan Drake <stiletto@mediaone.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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 *****************************************************************************
 *
 * Modified and extended by
 *    Mike Bernson <mike@mlb.org>
 *    Gerard v.d. Horst
 *    Leon van Stuivenberg <l.vanstuivenberg@chello.nl>
 *    Gernot Ziegler <gz@lysator.liu.se>
 *
 * Version History:
 * V1.0 Ryan Drake         Initial version by Ryan Drake
 * V1.1 Gerard v.d. Horst  Added some debugoutput, reset the video-standard
 */

#ifndef __KERNEL__
#define __KERNEL__
#endif

#include <linux/init.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include "ks0127.h"

#include <linux/i2c.h>
#include <linux/video_decoder.h>

#define dprintk     if (debug) printk

/* i2c identification */
#define I2C_KS0127_ADDON   0xD8
#define I2C_KS0127_ONBOARD 0xDA

#define KS_TYPE_UNKNOWN 0
#define KS_TYPE_0122S   1
#define KS_TYPE_0127    2
#define KS_TYPE_0127B   3

/* ks0127 control registers */
#define KS_STAT     0x00
#define KS_CMDA     0x01
#define KS_CMDB     0x02
#define KS_CMDC     0x03
#define KS_CMDD     0x04
#define KS_HAVB     0x05
#define KS_HAVE     0x06
#define KS_HS1B     0x07
#define KS_HS1E     0x08
#define KS_HS2B     0x09
#define KS_HS2E     0x0a
#define KS_AGC      0x0b
#define KS_HXTRA    0x0c
#define KS_CDEM     0x0d
#define KS_PORTAB   0x0e
#define KS_LUMA     0x0f
#define KS_CON      0x10
#define KS_BRT      0x11
#define KS_CHROMA   0x12
#define KS_CHROMB   0x13
#define KS_DEMOD    0x14
#define KS_SAT      0x15
#define KS_HUE      0x16
#define KS_VERTIA   0x17
#define KS_VERTIB   0x18
#define KS_VERTIC   0x19
#define KS_HSCLL    0x1a
#define KS_HSCLH    0x1b
#define KS_VSCLL    0x1c
#define KS_VSCLH    0x1d
#define KS_OFMTA    0x1e
#define KS_OFMTB    0x1f
#define KS_VBICTL   0x20
#define KS_CCDAT2   0x21
#define KS_CCDAT1   0x22
#define KS_VBIL30   0x23
#define KS_VBIL74   0x24
#define KS_VBIL118  0x25
#define KS_VBIL1512 0x26
#define KS_TTFRAM   0x27
#define KS_TESTA    0x28
#define KS_UVOFFH   0x29
#define KS_UVOFFL   0x2a
#define KS_UGAIN    0x2b
#define KS_VGAIN    0x2c
#define KS_VAVB     0x2d
#define KS_VAVE     0x2e
#define KS_CTRACK   0x2f
#define KS_POLCTL   0x30
#define KS_REFCOD   0x31
#define KS_INVALY   0x32
#define KS_INVALU   0x33
#define KS_INVALV   0x34
#define KS_UNUSEY   0x35
#define KS_UNUSEU   0x36
#define KS_UNUSEV   0x37
#define KS_USRSAV   0x38
#define KS_USREAV   0x39
#define KS_SHS1A    0x3a
#define KS_SHS1B    0x3b
#define KS_SHS1C    0x3c
#define KS_CMDE     0x3d
#define KS_VSDEL    0x3e
#define KS_CMDF     0x3f
#define KS_GAMMA0   0x40
#define KS_GAMMA1   0x41
#define KS_GAMMA2   0x42
#define KS_GAMMA3   0x43
#define KS_GAMMA4   0x44
#define KS_GAMMA5   0x45
#define KS_GAMMA6   0x46
#define KS_GAMMA7   0x47
#define KS_GAMMA8   0x48
#define KS_GAMMA9   0x49
#define KS_GAMMA10  0x4a
#define KS_GAMMA11  0x4b
#define KS_GAMMA12  0x4c
#define KS_GAMMA13  0x4d
#define KS_GAMMA14  0x4e
#define KS_GAMMA15  0x4f
#define KS_GAMMA16  0x50
#define KS_GAMMA17  0x51
#define KS_GAMMA18  0x52
#define KS_GAMMA19  0x53
#define KS_GAMMA20  0x54
#define KS_GAMMA21  0x55
#define KS_GAMMA22  0x56
#define KS_GAMMA23  0x57
#define KS_GAMMA24  0x58
#define KS_GAMMA25  0x59
#define KS_GAMMA26  0x5a
#define KS_GAMMA27  0x5b
#define KS_GAMMA28  0x5c
#define KS_GAMMA29  0x5d
#define KS_GAMMA30  0x5e
#define KS_GAMMA31  0x5f
#define KS_GAMMAD0  0x60
#define KS_GAMMAD1  0x61
#define KS_GAMMAD2  0x62
#define KS_GAMMAD3  0x63
#define KS_GAMMAD4  0x64
#define KS_GAMMAD5  0x65
#define KS_GAMMAD6  0x66
#define KS_GAMMAD7  0x67
#define KS_GAMMAD8  0x68
#define KS_GAMMAD9  0x69
#define KS_GAMMAD10 0x6a
#define KS_GAMMAD11 0x6b
#define KS_GAMMAD12 0x6c
#define KS_GAMMAD13 0x6d
#define KS_GAMMAD14 0x6e
#define KS_GAMMAD15 0x6f
#define KS_GAMMAD16 0x70
#define KS_GAMMAD17 0x71
#define KS_GAMMAD18 0x72
#define KS_GAMMAD19 0x73
#define KS_GAMMAD20 0x74
#define KS_GAMMAD21 0x75
#define KS_GAMMAD22 0x76
#define KS_GAMMAD23 0x77
#define KS_GAMMAD24 0x78
#define KS_GAMMAD25 0x79
#define KS_GAMMAD26 0x7a
#define KS_GAMMAD27 0x7b
#define KS_GAMMAD28 0x7c
#define KS_GAMMAD29 0x7d
#define KS_GAMMAD30 0x7e
#define KS_GAMMAD31 0x7f


/****************************************************************************
* mga_dev : represents one ks0127 chip.
****************************************************************************/

struct adjust {
      int   contrast;
      int   bright;
      int   hue;
      int   ugain;
      int   vgain;
};

struct ks0127 {
      struct i2c_client *client;
      unsigned char     addr;
      int         format_width;
      int         format_height;
      int         cap_width;
      int         cap_height;
      int         norm;
      int         ks_type;
      u8          regs[256];
};


static int debug; /* insmod parameter */

module_param(debug, int, 0);
MODULE_PARM_DESC(debug, "Debug output");
MODULE_LICENSE("GPL");

static u8 reg_defaults[64];



static void init_reg_defaults(void)
{
      u8 *table = reg_defaults;

      table[KS_CMDA]     = 0x2c;  /* VSE=0, CCIR 601, autodetect standard */
      table[KS_CMDB]     = 0x12;  /* VALIGN=0, AGC control and input */
      table[KS_CMDC]     = 0x00;  /* Test options */
      /* clock & input select, write 1 to PORTA */
      table[KS_CMDD]     = 0x01;
      table[KS_HAVB]     = 0x00;  /* HAV Start Control */
      table[KS_HAVE]     = 0x00;  /* HAV End Control */
      table[KS_HS1B]     = 0x10;  /* HS1 Start Control */
      table[KS_HS1E]     = 0x00;  /* HS1 End Control */
      table[KS_HS2B]     = 0x00;  /* HS2 Start Control */
      table[KS_HS2E]     = 0x00;  /* HS2 End Control */
      table[KS_AGC]      = 0x53;  /* Manual setting for AGC */
      table[KS_HXTRA]    = 0x00;  /* Extra Bits for HAV and HS1/2 */
      table[KS_CDEM]     = 0x00;  /* Chroma Demodulation Control */
      table[KS_PORTAB]   = 0x0f;  /* port B is input, port A output GPPORT */
      table[KS_LUMA]     = 0x01;  /* Luma control */
      table[KS_CON]      = 0x00;  /* Contrast Control */
      table[KS_BRT]      = 0x00;  /* Brightness Control */
      table[KS_CHROMA]   = 0x2a;  /* Chroma control A */
      table[KS_CHROMB]   = 0x90;  /* Chroma control B */
      table[KS_DEMOD]    = 0x00;  /* Chroma Demodulation Control & Status */
      table[KS_SAT]      = 0x00;  /* Color Saturation Control*/
      table[KS_HUE]      = 0x00;  /* Hue Control */
      table[KS_VERTIA]   = 0x00;  /* Vertical Processing Control A */
      /* Vertical Processing Control B, luma 1 line delayed */
      table[KS_VERTIB]   = 0x12;
      table[KS_VERTIC]   = 0x0b;  /* Vertical Processing Control C */
      table[KS_HSCLL]    = 0x00;  /* Horizontal Scaling Ratio Low */
      table[KS_HSCLH]    = 0x00;  /* Horizontal Scaling Ratio High */
      table[KS_VSCLL]    = 0x00;  /* Vertical Scaling Ratio Low */
      table[KS_VSCLH]    = 0x00;  /* Vertical Scaling Ratio High */
      /* 16 bit YCbCr 4:2:2 output; I can't make the bt866 like 8 bit /Sam */
      table[KS_OFMTA]    = 0x30;
      table[KS_OFMTB]    = 0x00;  /* Output Control B */
      /* VBI Decoder Control; 4bit fmt: avoid Y overflow */
      table[KS_VBICTL]   = 0x5d;
      table[KS_CCDAT2]   = 0x00;  /* Read Only register */
      table[KS_CCDAT1]   = 0x00;  /* Read Only register */
      table[KS_VBIL30]   = 0xa8;  /* VBI data decoding options */
      table[KS_VBIL74]   = 0xaa;  /* VBI data decoding options */
      table[KS_VBIL118]  = 0x2a;  /* VBI data decoding options */
      table[KS_VBIL1512] = 0x00;  /* VBI data decoding options */
      table[KS_TTFRAM]   = 0x00;  /* Teletext frame alignment pattern */
      table[KS_TESTA]    = 0x00;  /* test register, shouldn't be written */
      table[KS_UVOFFH]   = 0x00;  /* UV Offset Adjustment High */
      table[KS_UVOFFL]   = 0x00;  /* UV Offset Adjustment Low */
      table[KS_UGAIN]    = 0x00;  /* U Component Gain Adjustment */
      table[KS_VGAIN]    = 0x00;  /* V Component Gain Adjustment */
      table[KS_VAVB]     = 0x07;  /* VAV Begin */
      table[KS_VAVE]     = 0x00;  /* VAV End */
      table[KS_CTRACK]   = 0x00;  /* Chroma Tracking Control */
      table[KS_POLCTL]   = 0x41;  /* Timing Signal Polarity Control */
      table[KS_REFCOD]   = 0x80;  /* Reference Code Insertion Control */
      table[KS_INVALY]   = 0x10;  /* Invalid Y Code */
      table[KS_INVALU]   = 0x80;  /* Invalid U Code */
      table[KS_INVALV]   = 0x80;  /* Invalid V Code */
      table[KS_UNUSEY]   = 0x10;  /* Unused Y Code */
      table[KS_UNUSEU]   = 0x80;  /* Unused U Code */
      table[KS_UNUSEV]   = 0x80;  /* Unused V Code */
      table[KS_USRSAV]   = 0x00;  /* reserved */
      table[KS_USREAV]   = 0x00;  /* reserved */
      table[KS_SHS1A]    = 0x00;  /* User Defined SHS1 A */
      /* User Defined SHS1 B, ALT656=1 on 0127B */
      table[KS_SHS1B]    = 0x80;
      table[KS_SHS1C]    = 0x00;  /* User Defined SHS1 C */
      table[KS_CMDE]     = 0x00;  /* Command Register E */
      table[KS_VSDEL]    = 0x00;  /* VS Delay Control */
      /* Command Register F, update -immediately- */
      /* (there might come no vsync)*/
      table[KS_CMDF]     = 0x02;
}


/* We need to manually read because of a bug in the KS0127 chip.
 *
 * An explanation from kayork@mail.utexas.edu:
 *
 * During I2C reads, the KS0127 only samples for a stop condition
 * during the place where the acknoledge bit should be. Any standard
 * I2C implementation (correctly) throws in another clock transition
 * at the 9th bit, and the KS0127 will not recognize the stop condition
 * and will continue to clock out data.
 *
 * So we have to do the read ourself.  Big deal.
         workaround in i2c-algo-bit
 */


static u8 ks0127_read(struct ks0127 *ks, u8 reg)
{
      struct i2c_client *c = ks->client;
      char val = 0;
      struct i2c_msg msgs[] = {
            {c->addr, 0, sizeof(reg), &reg},
            {c->addr, I2C_M_RD | I2C_M_NO_RD_ACK, sizeof(val), &val}};
      int ret;

      ret = i2c_transfer(c->adapter, msgs, ARRAY_SIZE(msgs));
      if (ret != ARRAY_SIZE(msgs))
            dprintk("ks0127_write error\n");

      return val;
}


static void ks0127_write(struct ks0127 *ks, u8 reg, u8 val)
{
      char msg[] = {reg, val};

      if (i2c_master_send(ks->client, msg, sizeof(msg)) != sizeof(msg))
            dprintk("ks0127_write error\n");

      ks->regs[reg] = val;
}


/* generic bit-twiddling */
static void ks0127_and_or(struct ks0127 *ks, u8 reg, u8 and_v, u8 or_v)
{
      u8 val = ks->regs[reg];
      val = (val & and_v) | or_v;
      ks0127_write(ks, reg, val);
}



/****************************************************************************
* ks0127 private api
****************************************************************************/
static void ks0127_reset(struct ks0127* ks)
{
      int i;
      u8 *table = reg_defaults;

      ks->ks_type = KS_TYPE_UNKNOWN;

      dprintk("ks0127: reset\n");
      msleep(1);

      /* initialize all registers to known values */
      /* (except STAT, 0x21, 0x22, TEST and 0x38,0x39) */

      for(i = 1; i < 33; i++)
            ks0127_write(ks, i, table[i]);

      for(i = 35; i < 40; i++)
            ks0127_write(ks, i, table[i]);

      for(i = 41; i < 56; i++)
            ks0127_write(ks, i, table[i]);

      for(i = 58; i < 64; i++)
            ks0127_write(ks, i, table[i]);


      if ((ks0127_read(ks, KS_STAT) & 0x80) == 0) {
            ks->ks_type = KS_TYPE_0122S;
            dprintk("ks0127: ks0122s Found\n");
            return;
      }

      switch(ks0127_read(ks, KS_CMDE) & 0x0f) {

      case 0:
            ks->ks_type = KS_TYPE_0127;
            dprintk("ks0127: ks0127 found\n");
            break;

      case 9:
            ks->ks_type = KS_TYPE_0127B;
            dprintk("ks0127: ks0127B Revision A found\n");
            break;

      default:
            dprintk("ks0127: unknown revision\n");
            break;
      }
}

static int ks0127_command(struct i2c_client *client,
                    unsigned int cmd, void *arg)
{
      struct ks0127 *ks = i2c_get_clientdata(client);

      int         *iarg = (int*)arg;

      int         status;

      if (!ks)
            return -ENODEV;

      switch (cmd) {

      case DECODER_INIT:
            dprintk("ks0127: command DECODER_INIT\n");
            ks0127_reset(ks);
            break;

      case DECODER_SET_INPUT:
            switch(*iarg) {
            case KS_INPUT_COMPOSITE_1:
            case KS_INPUT_COMPOSITE_2:
            case KS_INPUT_COMPOSITE_3:
            case KS_INPUT_COMPOSITE_4:
            case KS_INPUT_COMPOSITE_5:
            case KS_INPUT_COMPOSITE_6:
                  dprintk("ks0127: command DECODER_SET_INPUT %d: "
                        "Composite\n", *iarg);
                  /* autodetect 50/60 Hz */
                  ks0127_and_or(ks, KS_CMDA,   0xfc, 0x00);
                  /* VSE=0 */
                  ks0127_and_or(ks, KS_CMDA,   ~0x40, 0x00);
                  /* set input line */
                  ks0127_and_or(ks, KS_CMDB,   0xb0, *iarg);
                  /* non-freerunning mode */
                  ks0127_and_or(ks, KS_CMDC,   0x70, 0x0a);
                  /* analog input */
                  ks0127_and_or(ks, KS_CMDD,   0x03, 0x00);
                  /* enable chroma demodulation */
                  ks0127_and_or(ks, KS_CTRACK, 0xcf, 0x00);
                  /* chroma trap, HYBWR=1 */
                  ks0127_and_or(ks, KS_LUMA,   0x00,
                               (reg_defaults[KS_LUMA])|0x0c);
                  /* scaler fullbw, luma comb off */
                  ks0127_and_or(ks, KS_VERTIA, 0x08, 0x81);
                  /* manual chroma comb .25 .5 .25 */
                  ks0127_and_or(ks, KS_VERTIC, 0x0f, 0x90);

                  /* chroma path delay */
                  ks0127_and_or(ks, KS_CHROMB, 0x0f, 0x90);

                  ks0127_write(ks, KS_UGAIN, reg_defaults[KS_UGAIN]);
                  ks0127_write(ks, KS_VGAIN, reg_defaults[KS_VGAIN]);
                  ks0127_write(ks, KS_UVOFFH, reg_defaults[KS_UVOFFH]);
                  ks0127_write(ks, KS_UVOFFL, reg_defaults[KS_UVOFFL]);
                  break;

            case KS_INPUT_SVIDEO_1:
            case KS_INPUT_SVIDEO_2:
            case KS_INPUT_SVIDEO_3:
                  dprintk("ks0127: command DECODER_SET_INPUT %d: "
                        "S-Video\n", *iarg);
                  /* autodetect 50/60 Hz */
                  ks0127_and_or(ks, KS_CMDA,   0xfc, 0x00);
                  /* VSE=0 */
                  ks0127_and_or(ks, KS_CMDA,   ~0x40, 0x00);
                  /* set input line */
                  ks0127_and_or(ks, KS_CMDB,   0xb0, *iarg);
                  /* non-freerunning mode */
                  ks0127_and_or(ks, KS_CMDC,   0x70, 0x0a);
                  /* analog input */
                  ks0127_and_or(ks, KS_CMDD,   0x03, 0x00);
                  /* enable chroma demodulation */
                  ks0127_and_or(ks, KS_CTRACK, 0xcf, 0x00);
                  ks0127_and_or(ks, KS_LUMA, 0x00,
                               reg_defaults[KS_LUMA]);
                  /* disable luma comb */
                  ks0127_and_or(ks, KS_VERTIA, 0x08,
                               (reg_defaults[KS_VERTIA]&0xf0)|0x01);
                  ks0127_and_or(ks, KS_VERTIC, 0x0f,
                               reg_defaults[KS_VERTIC]&0xf0);

                  ks0127_and_or(ks, KS_CHROMB, 0x0f,
                               reg_defaults[KS_CHROMB]&0xf0);

                  ks0127_write(ks, KS_UGAIN, reg_defaults[KS_UGAIN]);
                  ks0127_write(ks, KS_VGAIN, reg_defaults[KS_VGAIN]);
                  ks0127_write(ks, KS_UVOFFH, reg_defaults[KS_UVOFFH]);
                  ks0127_write(ks, KS_UVOFFL, reg_defaults[KS_UVOFFL]);
                  break;

            case KS_INPUT_YUV656:
                  dprintk("ks0127: command DECODER_SET_INPUT 15: "
                        "YUV656\n");
                  if (ks->norm == VIDEO_MODE_NTSC ||
                      ks->norm == KS_STD_PAL_M)
                        /* force 60 Hz */
                        ks0127_and_or(ks, KS_CMDA,   0xfc, 0x03);
                  else
                        /* force 50 Hz */
                        ks0127_and_or(ks, KS_CMDA,   0xfc, 0x02);

                  ks0127_and_or(ks, KS_CMDA,   0xff, 0x40); /* VSE=1 */
                  /* set input line and VALIGN */
                  ks0127_and_or(ks, KS_CMDB,   0xb0, (*iarg | 0x40));
                  /* freerunning mode, */
                  /* TSTGEN = 1 TSTGFR=11 TSTGPH=0 TSTGPK=0  VMEM=1*/
                  ks0127_and_or(ks, KS_CMDC,   0x70, 0x87);
                  /* digital input, SYNDIR = 0 INPSL=01 CLKDIR=0 EAV=0 */
                  ks0127_and_or(ks, KS_CMDD,   0x03, 0x08);
                  /* disable chroma demodulation */
                  ks0127_and_or(ks, KS_CTRACK, 0xcf, 0x30);
                  /* HYPK =01 CTRAP = 0 HYBWR=0 PED=1 RGBH=1 UNIT=1 */
                  ks0127_and_or(ks, KS_LUMA,   0x00, 0x71);
                  ks0127_and_or(ks, KS_VERTIC, 0x0f,
                               reg_defaults[KS_VERTIC]&0xf0);

                  /* scaler fullbw, luma comb off */
                  ks0127_and_or(ks, KS_VERTIA, 0x08, 0x81);

                  ks0127_and_or(ks, KS_CHROMB, 0x0f,
                               reg_defaults[KS_CHROMB]&0xf0);

                  ks0127_and_or(ks, KS_CON, 0x00, 0x00);
                  ks0127_and_or(ks, KS_BRT, 0x00, 32);      /* spec: 34 */
                        /* spec: 229 (e5) */
                  ks0127_and_or(ks, KS_SAT, 0x00, 0xe8);
                  ks0127_and_or(ks, KS_HUE, 0x00, 0);

                  ks0127_and_or(ks, KS_UGAIN, 0x00, 238);
                  ks0127_and_or(ks, KS_VGAIN, 0x00, 0x00);

                  /*UOFF:0x30, VOFF:0x30, TSTCGN=1 */
                  ks0127_and_or(ks, KS_UVOFFH, 0x00, 0x4f);
                  ks0127_and_or(ks, KS_UVOFFL, 0x00, 0x00);
                  break;

            default:
                  dprintk("ks0127: command DECODER_SET_INPUT: "
                        "Unknown input %d\n", *iarg);
                  break;
            }

            /* hack: CDMLPF sometimes spontaneously switches on; */
            /* force back off */
            ks0127_write(ks, KS_DEMOD, reg_defaults[KS_DEMOD]);
            break;

      case DECODER_SET_OUTPUT:
            switch(*iarg) {
            case KS_OUTPUT_YUV656E:
                  dprintk("ks0127: command DECODER_SET_OUTPUT: "
                        "OUTPUT_YUV656E (Missing)\n");
                  return -EINVAL;
                  break;

            case KS_OUTPUT_EXV:
                  dprintk("ks0127: command DECODER_SET_OUTPUT: "
                        "OUTPUT_EXV\n");
                  ks0127_and_or(ks, KS_OFMTA, 0xf0, 0x09);
                  break;
            }
            break;

      case DECODER_SET_NORM: //sam This block mixes old and new norm names...
            /* Set to automatic SECAM/Fsc mode */
            ks0127_and_or(ks, KS_DEMOD, 0xf0, 0x00);

            ks->norm = *iarg;
            switch(*iarg)
            {
            /* this is untested !! */
            /* It just detects PAL_N/NTSC_M (no special frequencies) */
            /* And you have to set the standard a second time afterwards */
            case VIDEO_MODE_AUTO:
                  dprintk("ks0127: command DECODER_SET_NORM: AUTO\n");

                  /* The chip determines the format */
                  /* based on the current field rate */
                  ks0127_and_or(ks, KS_CMDA,   0xfc, 0x00);
                  ks0127_and_or(ks, KS_CHROMA, 0x9f, 0x20);
                  /* This is wrong for PAL ! As I said, */
                  /* you need to set the standard once again !! */
                  ks->format_height = 240;
                  ks->format_width = 704;
                  break;

            case VIDEO_MODE_NTSC:
                  dprintk("ks0127: command DECODER_SET_NORM: NTSC_M\n");
                  ks0127_and_or(ks, KS_CHROMA, 0x9f, 0x20);
                  ks->format_height = 240;
                  ks->format_width = 704;
                  break;

            case KS_STD_NTSC_N:
                  dprintk("ks0127: command KS0127_SET_STANDARD: "
                        "NTSC_N (fixme)\n");
                  ks0127_and_or(ks, KS_CHROMA, 0x9f, 0x40);
                  ks->format_height = 240;
                  ks->format_width = 704;
                  break;

            case VIDEO_MODE_PAL:
                  dprintk("ks0127: command DECODER_SET_NORM: PAL_N\n");
                  ks0127_and_or(ks, KS_CHROMA, 0x9f, 0x20);
                  ks->format_height = 290;
                  ks->format_width = 704;
                  break;

            case KS_STD_PAL_M:
                  dprintk("ks0127: command KS0127_SET_STANDARD: "
                        "PAL_M (fixme)\n");
                  ks0127_and_or(ks, KS_CHROMA, 0x9f, 0x40);
                  ks->format_height = 290;
                  ks->format_width = 704;
                  break;

            case VIDEO_MODE_SECAM:
                  dprintk("ks0127: command KS0127_SET_STANDARD: "
                        "SECAM\n");
                  ks->format_height = 290;
                  ks->format_width = 704;

                  /* set to secam autodetection */
                  ks0127_and_or(ks, KS_CHROMA, 0xdf, 0x20);
                  ks0127_and_or(ks, KS_DEMOD, 0xf0, 0x00);
                  schedule_timeout_interruptible(HZ/10+1);

                  /* did it autodetect? */
                  if (ks0127_read(ks, KS_DEMOD) & 0x40)
                        break;

                  /* force to secam mode */
                  ks0127_and_or(ks, KS_DEMOD, 0xf0, 0x0f);
                  break;

            default:
                  dprintk("ks0127: command DECODER_SET_NORM: "
                        "Unknown norm %d\n", *iarg);
                  break;
            }
            break;

      case DECODER_SET_PICTURE:
            dprintk("ks0127: command DECODER_SET_PICTURE "
                  "not yet supported (fixme)\n");
            return -EINVAL;

      //sam todo: KS0127_SET_BRIGHTNESS: Merge into DECODER_SET_PICTURE
      //sam todo: KS0127_SET_CONTRAST: Merge into DECODER_SET_PICTURE
      //sam todo: KS0127_SET_HUE: Merge into DECODER_SET_PICTURE?
      //sam todo: KS0127_SET_SATURATION: Merge into DECODER_SET_PICTURE
      //sam todo: KS0127_SET_AGC_MODE:
      //sam todo: KS0127_SET_AGC:
      //sam todo: KS0127_SET_CHROMA_MODE:
      //sam todo: KS0127_SET_PIXCLK_MODE:
      //sam todo: KS0127_SET_GAMMA_MODE:
      //sam todo: KS0127_SET_UGAIN:
      //sam todo: KS0127_SET_VGAIN:
      //sam todo: KS0127_SET_INVALY:
      //sam todo: KS0127_SET_INVALU:
      //sam todo: KS0127_SET_INVALV:
      //sam todo: KS0127_SET_UNUSEY:
      //sam todo: KS0127_SET_UNUSEU:
      //sam todo: KS0127_SET_UNUSEV:
      //sam todo: KS0127_SET_VSALIGN_MODE:

      case DECODER_ENABLE_OUTPUT:
      {

            int *iarg = arg;
            int enable = (*iarg != 0);
                  if (enable) {
                        dprintk("ks0127: command "
                              "DECODER_ENABLE_OUTPUT on "
                              "(%d)\n", enable);
                        /* All output pins on */
                        ks0127_and_or(ks, KS_OFMTA, 0xcf, 0x30);
                        /* Obey the OEN pin */
                        ks0127_and_or(ks, KS_CDEM, 0x7f, 0x00);
                  } else {
                        dprintk("ks0127: command "
                              "DECODER_ENABLE_OUTPUT off "
                              "(%d)\n", enable);
                        /* Video output pins off */
                        ks0127_and_or(ks, KS_OFMTA, 0xcf, 0x00);
                        /* Ignore the OEN pin */
                        ks0127_and_or(ks, KS_CDEM, 0x7f, 0x80);
                  }
      }
            break;

      //sam todo: KS0127_SET_OUTPUT_MODE:
      //sam todo: KS0127_SET_WIDTH:
      //sam todo: KS0127_SET_HEIGHT:
      //sam todo: KS0127_SET_HSCALE:

      case DECODER_GET_STATUS:
            dprintk("ks0127: command DECODER_GET_STATUS\n");
            *iarg = 0;
            status = ks0127_read(ks, KS_STAT);
            if (!(status & 0x20))          /* NOVID not set */
                  *iarg = (*iarg | DECODER_STATUS_GOOD);
            if ((status & 0x01))                /* CLOCK set */
                  *iarg = (*iarg | DECODER_STATUS_COLOR);
            if ((status & 0x08))             /* PALDET set */
                  *iarg = (*iarg | DECODER_STATUS_PAL);
            else
                  *iarg = (*iarg | DECODER_STATUS_NTSC);
            break;

      //Catch any unknown command
      default:
            dprintk("ks0127: command unknown: %04X\n", cmd);
            return -EINVAL;
      }
      return 0;
}




static int ks0127_probe(struct i2c_adapter *adapter);
static int ks0127_detach(struct i2c_client *client);
static int ks0127_command(struct i2c_client *client,
                    unsigned int cmd, void *arg);



/* Addresses to scan */
static unsigned short normal_i2c[] = {I2C_KS0127_ADDON>>1,
                               I2C_KS0127_ONBOARD>>1, I2C_CLIENT_END};
static unsigned short probe[2] =    {I2C_CLIENT_END, I2C_CLIENT_END};
static unsigned short ignore[2] =   {I2C_CLIENT_END, I2C_CLIENT_END};
static struct i2c_client_address_data addr_data = {
      normal_i2c,
      probe,
      ignore,
};

static struct i2c_driver i2c_driver_ks0127 = {
      .driver.name = "ks0127",
      .id             = I2C_DRIVERID_KS0127,
      .attach_adapter = ks0127_probe,
      .detach_client  = ks0127_detach,
      .command        = ks0127_command
};

static struct i2c_client ks0127_client_tmpl =
{
      .name = "(ks0127 unset)",
      .addr = 0,
      .adapter = NULL,
      .driver = &i2c_driver_ks0127,
      .usage_count = 0
};

static int ks0127_found_proc(struct i2c_adapter *adapter, int addr, int kind)
{
      struct ks0127 *ks;
      struct i2c_client *client;

      client = kzalloc(sizeof(*client), GFP_KERNEL);
      if (client == NULL)
            return -ENOMEM;
      memcpy(client, &ks0127_client_tmpl, sizeof(*client));

      ks = kzalloc(sizeof(*ks), GFP_KERNEL);
      if (ks == NULL) {
            kfree(client);
            return -ENOMEM;
      }

      i2c_set_clientdata(client, ks);
      client->adapter = adapter;
      client->addr = addr;
      sprintf(client->name, "ks0127-%02x", adapter->id);

      ks->client = client;
      ks->addr = addr;
      ks->ks_type = KS_TYPE_UNKNOWN;

      /* power up */
      ks0127_write(ks, KS_CMDA, 0x2c);
      mdelay(10);

      /* reset the device */
      ks0127_reset(ks);
      printk(KERN_INFO "ks0127: attach: %s video decoder\n",
             ks->addr==(I2C_KS0127_ADDON>>1) ? "addon" : "on-board");

      i2c_attach_client(client);
      return 0;
}


static int ks0127_probe(struct i2c_adapter *adapter)
{
      if (adapter->id == I2C_HW_B_ZR36067)
            return i2c_probe(adapter, &addr_data, ks0127_found_proc);
      return 0;
}

static int ks0127_detach(struct i2c_client *client)
{
      struct ks0127 *ks = i2c_get_clientdata(client);

      ks0127_write(ks, KS_OFMTA, 0x20); /*tristate*/
      ks0127_write(ks, KS_CMDA, 0x2c | 0x80); /* power down */

      i2c_detach_client(client);
      kfree(ks);
      kfree(client);

      dprintk("ks0127: detach\n");
      return 0;
}


static int __devinit ks0127_init_module(void)
{
      init_reg_defaults();
      return i2c_add_driver(&i2c_driver_ks0127);
}

static void __devexit ks0127_cleanup_module(void)
{
      i2c_del_driver(&i2c_driver_ks0127);
}


module_init(ks0127_init_module);
module_exit(ks0127_cleanup_module);

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