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 * You should have received a copy of the GNU General Public License
  23 * along with this program; if not, write to the Free Software
  24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25 */
  26
  27#include <linux/module.h>
  28#include <linux/types.h>
  29#include <linux/slab.h>
  30#include <linux/ioctl.h>
  31#include <asm/uaccess.h>
  32#include <linux/i2c.h>
  33#include <linux/videodev2.h>
  34#include <media/v4l2-device.h>
  35
  36MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  37MODULE_AUTHOR("Dave Perks");
  38MODULE_LICENSE("GPL");
  39
  40static int debug;
  41module_param(debug, int, 0);
  42MODULE_PARM_DESC(debug, "Debug level (0-1)");
  43
  44
  45/* ----------------------------------------------------------------------- */
  46
  47struct saa7185 {
  48        struct v4l2_subdev sd;
  49        unsigned char reg[128];
  50
  51        v4l2_std_id norm;
  52};
  53
  54static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  55{
  56        return container_of(sd, struct saa7185, sd);
  57}
  58
  59/* ----------------------------------------------------------------------- */
  60
  61static inline int saa7185_read(struct v4l2_subdev *sd)
  62{
  63        struct i2c_client *client = v4l2_get_subdevdata(sd);
  64
  65        return i2c_smbus_read_byte(client);
  66}
  67
  68static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  69{
  70        struct i2c_client *client = v4l2_get_subdevdata(sd);
  71        struct saa7185 *encoder = to_saa7185(sd);
  72
  73        v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  74        encoder->reg[reg] = value;
  75        return i2c_smbus_write_byte_data(client, reg, value);
  76}
  77
  78static int saa7185_write_block(struct v4l2_subdev *sd,
  79                const u8 *data, unsigned int len)
  80{
  81        struct i2c_client *client = v4l2_get_subdevdata(sd);
  82        struct saa7185 *encoder = to_saa7185(sd);
  83        int ret = -1;
  84        u8 reg;
  85
  86        /* the adv7175 has an autoincrement function, use it if
  87         * the adapter understands raw I2C */
  88        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  89                /* do raw I2C, not smbus compatible */
  90                u8 block_data[32];
  91                int block_len;
  92
  93                while (len >= 2) {
  94                        block_len = 0;
  95                        block_data[block_len++] = reg = data[0];
  96                        do {
  97                                block_data[block_len++] =
  98                                    encoder->reg[reg++] = data[1];
  99                                len -= 2;
 100                                data += 2;
 101                        } while (len >= 2 && data[0] == reg && block_len < 32);
 102                        ret = i2c_master_send(client, block_data, block_len);
 103                        if (ret < 0)
 104                                break;
 105                }
 106        } else {
 107                /* do some slow I2C emulation kind of thing */
 108                while (len >= 2) {
 109                        reg = *data++;
 110                        ret = saa7185_write(sd, reg, *data++);
 111                        if (ret < 0)
 112                                break;
 113                        len -= 2;
 114                }
 115        }
 116
 117        return ret;
 118}
 119
 120/* ----------------------------------------------------------------------- */
 121
 122static const unsigned char init_common[] = {
 123        0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 124                                 * YUV2C=1, MY2C=1, MUV2C=1 */
 125
 126        0x42, 0x6b,             /* OVLY0=107 */
 127        0x43, 0x00,             /* OVLU0=0     white */
 128        0x44, 0x00,             /* OVLV0=0   */
 129        0x45, 0x22,             /* OVLY1=34  */
 130        0x46, 0xac,             /* OVLU1=172   yellow */
 131        0x47, 0x0e,             /* OVLV1=14  */
 132        0x48, 0x03,             /* OVLY2=3   */
 133        0x49, 0x1d,             /* OVLU2=29    cyan */
 134        0x4a, 0xac,             /* OVLV2=172 */
 135        0x4b, 0xf0,             /* OVLY3=240 */
 136        0x4c, 0xc8,             /* OVLU3=200   green */
 137        0x4d, 0xb9,             /* OVLV3=185 */
 138        0x4e, 0xd4,             /* OVLY4=212 */
 139        0x4f, 0x38,             /* OVLU4=56    magenta */
 140        0x50, 0x47,             /* OVLV4=71  */
 141        0x51, 0xc1,             /* OVLY5=193 */
 142        0x52, 0xe3,             /* OVLU5=227   red */
 143        0x53, 0x54,             /* OVLV5=84  */
 144        0x54, 0xa3,             /* OVLY6=163 */
 145        0x55, 0x54,             /* OVLU6=84    blue */
 146        0x56, 0xf2,             /* OVLV6=242 */
 147        0x57, 0x90,             /* OVLY7=144 */
 148        0x58, 0x00,             /* OVLU7=0     black */
 149        0x59, 0x00,             /* OVLV7=0   */
 150
 151        0x5a, 0x00,             /* CHPS=0    */
 152        0x5b, 0x76,             /* GAINU=118 */
 153        0x5c, 0xa5,             /* GAINV=165 */
 154        0x5d, 0x3c,             /* BLCKL=60  */
 155        0x5e, 0x3a,             /* BLNNL=58  */
 156        0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 157        0x60, 0x00,             /* NULL      */
 158
 159        /* 0x61 - 0x66 set according to norm */
 160
 161        0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 162        0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 163        0x69, 0x00,             /* 0 : caption 1st byte even field */
 164        0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 165
 166        0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 167        0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 168                                 * CBLF=0, ORCV2=0, PRCV2=0 */
 169        0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 170
 171        0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 172                                 * least for PAL */
 173        0x6f, 0x00,             /* HTRIG upper bits */
 174        0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 175
 176        /* The following should not be needed */
 177
 178        0x71, 0x15,             /* BMRQ=0x115 */
 179        0x72, 0x90,             /* EMRQ=0x690 */
 180        0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 181        0x74, 0x00,             /* NULL       */
 182        0x75, 0x00,             /* NULL       */
 183        0x76, 0x00,             /* NULL       */
 184        0x77, 0x15,             /* BRCV=0x115 */
 185        0x78, 0x90,             /* ERCV=0x690 */
 186        0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 187
 188        /* Field length controls */
 189
 190        0x7a, 0x70,             /* FLC=0 */
 191
 192        /* The following should not be needed if SBLN = 1 */
 193
 194        0x7b, 0x16,             /* FAL=22 */
 195        0x7c, 0x35,             /* LAL=244 */
 196        0x7d, 0x20,             /* LAL=244, FAL=22 */
 197};
 198
 199static const unsigned char init_pal[] = {
 200        0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 201                                 * YGS=1, INPI=0, DOWN=0 */
 202        0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 203        0x63, 0xcb,             /* FSC0 */
 204        0x64, 0x8a,             /* FSC1 */
 205        0x65, 0x09,             /* FSC2 */
 206        0x66, 0x2a,             /* FSC3 */
 207};
 208
 209static const unsigned char init_ntsc[] = {
 210        0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 211                                 * YGS=1, INPI=0, DOWN=0 */
 212        0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 213        0x63, 0x1f,             /* FSC0 */
 214        0x64, 0x7c,             /* FSC1 */
 215        0x65, 0xf0,             /* FSC2 */
 216        0x66, 0x21,             /* FSC3 */
 217};
 218
 219
 220static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 221{
 222        struct saa7185 *encoder = to_saa7185(sd);
 223
 224        saa7185_write_block(sd, init_common, sizeof(init_common));
 225        if (encoder->norm & V4L2_STD_NTSC)
 226                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 227        else
 228                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 229        return 0;
 230}
 231
 232static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 233{
 234        struct saa7185 *encoder = to_saa7185(sd);
 235
 236        if (std & V4L2_STD_NTSC)
 237                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 238        else if (std & V4L2_STD_PAL)
 239                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 240        else
 241                return -EINVAL;
 242        encoder->norm = std;
 243        return 0;
 244}
 245
 246static int saa7185_s_routing(struct v4l2_subdev *sd,
 247                             u32 input, u32 output, u32 config)
 248{
 249        struct saa7185 *encoder = to_saa7185(sd);
 250
 251        /* RJ: input = 0: input is from SA7111
 252         input = 1: input is from ZR36060 */
 253
 254        switch (input) {
 255        case 0:
 256                /* turn off colorbar */
 257                saa7185_write(sd, 0x3a, 0x0f);
 258                /* Switch RTCE to 1 */
 259                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 260                saa7185_write(sd, 0x6e, 0x01);
 261                break;
 262
 263        case 1:
 264                /* turn off colorbar */
 265                saa7185_write(sd, 0x3a, 0x0f);
 266                /* Switch RTCE to 0 */
 267                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 268                /* SW: a slight sync problem... */
 269                saa7185_write(sd, 0x6e, 0x00);
 270                break;
 271
 272        case 2:
 273                /* turn on colorbar */
 274                saa7185_write(sd, 0x3a, 0x8f);
 275                /* Switch RTCE to 0 */
 276                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 277                /* SW: a slight sync problem... */
 278                saa7185_write(sd, 0x6e, 0x01);
 279                break;
 280
 281        default:
 282                return -EINVAL;
 283        }
 284        return 0;
 285}
 286
 287/* ----------------------------------------------------------------------- */
 288
 289static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 290        .init = saa7185_init,
 291};
 292
 293static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 294        .s_std_output = saa7185_s_std_output,
 295        .s_routing = saa7185_s_routing,
 296};
 297
 298static const struct v4l2_subdev_ops saa7185_ops = {
 299        .core = &saa7185_core_ops,
 300        .video = &saa7185_video_ops,
 301};
 302
 303
 304/* ----------------------------------------------------------------------- */
 305
 306static int saa7185_probe(struct i2c_client *client,
 307                        const struct i2c_device_id *id)
 308{
 309        int i;
 310        struct saa7185 *encoder;
 311        struct v4l2_subdev *sd;
 312
 313        /* Check if the adapter supports the needed features */
 314        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 315                return -ENODEV;
 316
 317        v4l_info(client, "chip found @ 0x%x (%s)\n",
 318                        client->addr << 1, client->adapter->name);
 319
 320        encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 321        if (encoder == NULL)
 322                return -ENOMEM;
 323        encoder->norm = V4L2_STD_NTSC;
 324        sd = &encoder->sd;
 325        v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 326
 327        i = saa7185_write_block(sd, init_common, sizeof(init_common));
 328        if (i >= 0)
 329                i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 330        if (i < 0)
 331                v4l2_dbg(1, debug, sd, "init error %d\n", i);
 332        else
 333                v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 334                                saa7185_read(sd) >> 5);
 335        return 0;
 336}
 337
 338static int saa7185_remove(struct i2c_client *client)
 339{
 340        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 341        struct saa7185 *encoder = to_saa7185(sd);
 342
 343        v4l2_device_unregister_subdev(sd);
 344        /* SW: output off is active */
 345        saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 346        return 0;
 347}
 348
 349/* ----------------------------------------------------------------------- */
 350
 351static const struct i2c_device_id saa7185_id[] = {
 352        { "saa7185", 0 },
 353        { }
 354};
 355MODULE_DEVICE_TABLE(i2c, saa7185_id);
 356
 357static struct i2c_driver saa7185_driver = {
 358        .driver = {
 359                .owner  = THIS_MODULE,
 360                .name   = "saa7185",
 361        },
 362        .probe          = saa7185_probe,
 363        .remove         = saa7185_remove,
 364        .id_table       = saa7185_id,
 365};
 366
 367module_i2c_driver(saa7185_driver);
 368