LXR linux/drivers/media/i2c/saa7185.c

   1/*
   2 * saa7185 - Philips SAA7185B video encoder driver version 0.0.3
   3 *
   4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5 *
   6 * Slight changes for video timing and attachment output by
   7 * Wolfgang Scherr <scherr@net4you.net>
   8 *
   9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10 *    - moved over to linux>=2.4.x i2c protocol (1/1/2003)
  11 *
  12 * This program is free software; you can redistribute it and/or modify
  13 * it under the terms of the GNU General Public License as published by
  14 * the Free Software Foundation; either version 2 of the License, or
  15 * (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 */
  22
  23#include <linux/module.h>
  24#include <linux/types.h>
  25#include <linux/slab.h>
  26#include <linux/ioctl.h>
  27#include <linux/uaccess.h>
  28#include <linux/i2c.h>
  29#include <linux/videodev2.h>
  30#include <media/v4l2-device.h>
  31
  32MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  33MODULE_AUTHOR("Dave Perks");
  34MODULE_LICENSE("GPL");
  35
  36static int debug;
  37module_param(debug, int, 0);
  38MODULE_PARM_DESC(debug, "Debug level (0-1)");
  39
  40
  41/* ----------------------------------------------------------------------- */
  42
  43struct saa7185 {
  44        struct v4l2_subdev sd;
  45        unsigned char reg[128];
  46
  47        v4l2_std_id norm;
  48};
  49
  50static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  51{
  52        return container_of(sd, struct saa7185, sd);
  53}
  54
  55/* ----------------------------------------------------------------------- */
  56
  57static inline int saa7185_read(struct v4l2_subdev *sd)
  58{
  59        struct i2c_client *client = v4l2_get_subdevdata(sd);
  60
  61        return i2c_smbus_read_byte(client);
  62}
  63
  64static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  65{
  66        struct i2c_client *client = v4l2_get_subdevdata(sd);
  67        struct saa7185 *encoder = to_saa7185(sd);
  68
  69        v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  70        encoder->reg[reg] = value;
  71        return i2c_smbus_write_byte_data(client, reg, value);
  72}
  73
  74static int saa7185_write_block(struct v4l2_subdev *sd,
  75                const u8 *data, unsigned int len)
  76{
  77        struct i2c_client *client = v4l2_get_subdevdata(sd);
  78        struct saa7185 *encoder = to_saa7185(sd);
  79        int ret = -1;
  80        u8 reg;
  81
  82        /* the adv7175 has an autoincrement function, use it if
  83         * the adapter understands raw I2C */
  84        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  85                /* do raw I2C, not smbus compatible */
  86                u8 block_data[32];
  87                int block_len;
  88
  89                while (len >= 2) {
  90                        block_len = 0;
  91                        block_data[block_len++] = reg = data[0];
  92                        do {
  93                                block_data[block_len++] =
  94                                    encoder->reg[reg++] = data[1];
  95                                len -= 2;
  96                                data += 2;
  97                        } while (len >= 2 && data[0] == reg && block_len < 32);
  98                        ret = i2c_master_send(client, block_data, block_len);
  99                        if (ret < 0)
 100                                break;
 101                }
 102        } else {
 103                /* do some slow I2C emulation kind of thing */
 104                while (len >= 2) {
 105                        reg = *data++;
 106                        ret = saa7185_write(sd, reg, *data++);
 107                        if (ret < 0)
 108                                break;
 109                        len -= 2;
 110                }
 111        }
 112
 113        return ret;
 114}
 115
 116/* ----------------------------------------------------------------------- */
 117
 118static const unsigned char init_common[] = {
 119        0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 120                                 * YUV2C=1, MY2C=1, MUV2C=1 */
 121
 122        0x42, 0x6b,             /* OVLY0=107 */
 123        0x43, 0x00,             /* OVLU0=0     white */
 124        0x44, 0x00,             /* OVLV0=0   */
 125        0x45, 0x22,             /* OVLY1=34  */
 126        0x46, 0xac,             /* OVLU1=172   yellow */
 127        0x47, 0x0e,             /* OVLV1=14  */
 128        0x48, 0x03,             /* OVLY2=3   */
 129        0x49, 0x1d,             /* OVLU2=29    cyan */
 130        0x4a, 0xac,             /* OVLV2=172 */
 131        0x4b, 0xf0,             /* OVLY3=240 */
 132        0x4c, 0xc8,             /* OVLU3=200   green */
 133        0x4d, 0xb9,             /* OVLV3=185 */
 134        0x4e, 0xd4,             /* OVLY4=212 */
 135        0x4f, 0x38,             /* OVLU4=56    magenta */
 136        0x50, 0x47,             /* OVLV4=71  */
 137        0x51, 0xc1,             /* OVLY5=193 */
 138        0x52, 0xe3,             /* OVLU5=227   red */
 139        0x53, 0x54,             /* OVLV5=84  */
 140        0x54, 0xa3,             /* OVLY6=163 */
 141        0x55, 0x54,             /* OVLU6=84    blue */
 142        0x56, 0xf2,             /* OVLV6=242 */
 143        0x57, 0x90,             /* OVLY7=144 */
 144        0x58, 0x00,             /* OVLU7=0     black */
 145        0x59, 0x00,             /* OVLV7=0   */
 146
 147        0x5a, 0x00,             /* CHPS=0    */
 148        0x5b, 0x76,             /* GAINU=118 */
 149        0x5c, 0xa5,             /* GAINV=165 */
 150        0x5d, 0x3c,             /* BLCKL=60  */
 151        0x5e, 0x3a,             /* BLNNL=58  */
 152        0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 153        0x60, 0x00,             /* NULL      */
 154
 155        /* 0x61 - 0x66 set according to norm */
 156
 157        0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 158        0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 159        0x69, 0x00,             /* 0 : caption 1st byte even field */
 160        0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 161
 162        0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 163        0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 164                                 * CBLF=0, ORCV2=0, PRCV2=0 */
 165        0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 166
 167        0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 168                                 * least for PAL */
 169        0x6f, 0x00,             /* HTRIG upper bits */
 170        0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 171
 172        /* The following should not be needed */
 173
 174        0x71, 0x15,             /* BMRQ=0x115 */
 175        0x72, 0x90,             /* EMRQ=0x690 */
 176        0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 177        0x74, 0x00,             /* NULL       */
 178        0x75, 0x00,             /* NULL       */
 179        0x76, 0x00,             /* NULL       */
 180        0x77, 0x15,             /* BRCV=0x115 */
 181        0x78, 0x90,             /* ERCV=0x690 */
 182        0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 183
 184        /* Field length controls */
 185
 186        0x7a, 0x70,             /* FLC=0 */
 187
 188        /* The following should not be needed if SBLN = 1 */
 189
 190        0x7b, 0x16,             /* FAL=22 */
 191        0x7c, 0x35,             /* LAL=244 */
 192        0x7d, 0x20,             /* LAL=244, FAL=22 */
 193};
 194
 195static const unsigned char init_pal[] = {
 196        0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 197                                 * YGS=1, INPI=0, DOWN=0 */
 198        0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 199        0x63, 0xcb,             /* FSC0 */
 200        0x64, 0x8a,             /* FSC1 */
 201        0x65, 0x09,             /* FSC2 */
 202        0x66, 0x2a,             /* FSC3 */
 203};
 204
 205static const unsigned char init_ntsc[] = {
 206        0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 207                                 * YGS=1, INPI=0, DOWN=0 */
 208        0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 209        0x63, 0x1f,             /* FSC0 */
 210        0x64, 0x7c,             /* FSC1 */
 211        0x65, 0xf0,             /* FSC2 */
 212        0x66, 0x21,             /* FSC3 */
 213};
 214
 215
 216static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 217{
 218        struct saa7185 *encoder = to_saa7185(sd);
 219
 220        saa7185_write_block(sd, init_common, sizeof(init_common));
 221        if (encoder->norm & V4L2_STD_NTSC)
 222                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 223        else
 224                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 225        return 0;
 226}
 227
 228static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 229{
 230        struct saa7185 *encoder = to_saa7185(sd);
 231
 232        if (std & V4L2_STD_NTSC)
 233                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 234        else if (std & V4L2_STD_PAL)
 235                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 236        else
 237                return -EINVAL;
 238        encoder->norm = std;
 239        return 0;
 240}
 241
 242static int saa7185_s_routing(struct v4l2_subdev *sd,
 243                             u32 input, u32 output, u32 config)
 244{
 245        struct saa7185 *encoder = to_saa7185(sd);
 246
 247        /* RJ: input = 0: input is from SA7111
 248         input = 1: input is from ZR36060 */
 249
 250        switch (input) {
 251        case 0:
 252                /* turn off colorbar */
 253                saa7185_write(sd, 0x3a, 0x0f);
 254                /* Switch RTCE to 1 */
 255                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 256                saa7185_write(sd, 0x6e, 0x01);
 257                break;
 258
 259        case 1:
 260                /* turn off colorbar */
 261                saa7185_write(sd, 0x3a, 0x0f);
 262                /* Switch RTCE to 0 */
 263                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 264                /* SW: a slight sync problem... */
 265                saa7185_write(sd, 0x6e, 0x00);
 266                break;
 267
 268        case 2:
 269                /* turn on colorbar */
 270                saa7185_write(sd, 0x3a, 0x8f);
 271                /* Switch RTCE to 0 */
 272                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 273                /* SW: a slight sync problem... */
 274                saa7185_write(sd, 0x6e, 0x01);
 275                break;
 276
 277        default:
 278                return -EINVAL;
 279        }
 280        return 0;
 281}
 282
 283/* ----------------------------------------------------------------------- */
 284
 285static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 286        .init = saa7185_init,
 287};
 288
 289static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 290        .s_std_output = saa7185_s_std_output,
 291        .s_routing = saa7185_s_routing,
 292};
 293
 294static const struct v4l2_subdev_ops saa7185_ops = {
 295        .core = &saa7185_core_ops,
 296        .video = &saa7185_video_ops,
 297};
 298
 299
 300/* ----------------------------------------------------------------------- */
 301
 302static int saa7185_probe(struct i2c_client *client,
 303                        const struct i2c_device_id *id)
 304{
 305        int i;
 306        struct saa7185 *encoder;
 307        struct v4l2_subdev *sd;
 308
 309        /* Check if the adapter supports the needed features */
 310        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 311                return -ENODEV;
 312
 313        v4l_info(client, "chip found @ 0x%x (%s)\n",
 314                        client->addr << 1, client->adapter->name);
 315
 316        encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 317        if (encoder == NULL)
 318                return -ENOMEM;
 319        encoder->norm = V4L2_STD_NTSC;
 320        sd = &encoder->sd;
 321        v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 322
 323        i = saa7185_write_block(sd, init_common, sizeof(init_common));
 324        if (i >= 0)
 325                i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 326        if (i < 0)
 327                v4l2_dbg(1, debug, sd, "init error %d\n", i);
 328        else
 329                v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 330                                saa7185_read(sd) >> 5);
 331        return 0;
 332}
 333
 334static int saa7185_remove(struct i2c_client *client)
 335{
 336        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 337        struct saa7185 *encoder = to_saa7185(sd);
 338
 339        v4l2_device_unregister_subdev(sd);
 340        /* SW: output off is active */
 341        saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 342        return 0;
 343}
 344
 345/* ----------------------------------------------------------------------- */
 346
 347static const struct i2c_device_id saa7185_id[] = {
 348        { "saa7185", 0 },
 349        { }
 350};
 351MODULE_DEVICE_TABLE(i2c, saa7185_id);
 352
 353static struct i2c_driver saa7185_driver = {
 354        .driver = {
 355                .name   = "saa7185",
 356        },
 357        .probe          = saa7185_probe,
 358        .remove         = saa7185_remove,
 359        .id_table       = saa7185_id,
 360};
 361
 362module_i2c_driver(saa7185_driver);
 363