LXR linux/drivers/media/video/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/ioctl.h>
  30#include <asm/uaccess.h>
  31#include <linux/i2c.h>
  32#include <linux/i2c-id.h>
  33#include <linux/videodev2.h>
  34#include <media/v4l2-device.h>
  35#include <media/v4l2-chip-ident.h>
  36#include <media/v4l2-i2c-drv.h>
  37
  38MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  39MODULE_AUTHOR("Dave Perks");
  40MODULE_LICENSE("GPL");
  41
  42static int debug;
  43module_param(debug, int, 0);
  44MODULE_PARM_DESC(debug, "Debug level (0-1)");
  45
  46
  47/* ----------------------------------------------------------------------- */
  48
  49struct saa7185 {
  50        struct v4l2_subdev sd;
  51        unsigned char reg[128];
  52
  53        v4l2_std_id norm;
  54};
  55
  56static inline struct saa7185 *to_saa7185(struct v4l2_subdev *sd)
  57{
  58        return container_of(sd, struct saa7185, sd);
  59}
  60
  61/* ----------------------------------------------------------------------- */
  62
  63static inline int saa7185_read(struct v4l2_subdev *sd)
  64{
  65        struct i2c_client *client = v4l2_get_subdevdata(sd);
  66
  67        return i2c_smbus_read_byte(client);
  68}
  69
  70static int saa7185_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  71{
  72        struct i2c_client *client = v4l2_get_subdevdata(sd);
  73        struct saa7185 *encoder = to_saa7185(sd);
  74
  75        v4l2_dbg(1, debug, sd, "%02x set to %02x\n", reg, value);
  76        encoder->reg[reg] = value;
  77        return i2c_smbus_write_byte_data(client, reg, value);
  78}
  79
  80static int saa7185_write_block(struct v4l2_subdev *sd,
  81                const u8 *data, unsigned int len)
  82{
  83        struct i2c_client *client = v4l2_get_subdevdata(sd);
  84        struct saa7185 *encoder = to_saa7185(sd);
  85        int ret = -1;
  86        u8 reg;
  87
  88        /* the adv7175 has an autoincrement function, use it if
  89         * the adapter understands raw I2C */
  90        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  91                /* do raw I2C, not smbus compatible */
  92                u8 block_data[32];
  93                int block_len;
  94
  95                while (len >= 2) {
  96                        block_len = 0;
  97                        block_data[block_len++] = reg = data[0];
  98                        do {
  99                                block_data[block_len++] =
 100                                    encoder->reg[reg++] = data[1];
 101                                len -= 2;
 102                                data += 2;
 103                        } while (len >= 2 && data[0] == reg && block_len < 32);
 104                        ret = i2c_master_send(client, block_data, block_len);
 105                        if (ret < 0)
 106                                break;
 107                }
 108        } else {
 109                /* do some slow I2C emulation kind of thing */
 110                while (len >= 2) {
 111                        reg = *data++;
 112                        ret = saa7185_write(sd, reg, *data++);
 113                        if (ret < 0)
 114                                break;
 115                        len -= 2;
 116                }
 117        }
 118
 119        return ret;
 120}
 121
 122/* ----------------------------------------------------------------------- */
 123
 124static const unsigned char init_common[] = {
 125        0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 126                                 * YUV2C=1, MY2C=1, MUV2C=1 */
 127
 128        0x42, 0x6b,             /* OVLY0=107 */
 129        0x43, 0x00,             /* OVLU0=0     white */
 130        0x44, 0x00,             /* OVLV0=0   */
 131        0x45, 0x22,             /* OVLY1=34  */
 132        0x46, 0xac,             /* OVLU1=172   yellow */
 133        0x47, 0x0e,             /* OVLV1=14  */
 134        0x48, 0x03,             /* OVLY2=3   */
 135        0x49, 0x1d,             /* OVLU2=29    cyan */
 136        0x4a, 0xac,             /* OVLV2=172 */
 137        0x4b, 0xf0,             /* OVLY3=240 */
 138        0x4c, 0xc8,             /* OVLU3=200   green */
 139        0x4d, 0xb9,             /* OVLV3=185 */
 140        0x4e, 0xd4,             /* OVLY4=212 */
 141        0x4f, 0x38,             /* OVLU4=56    magenta */
 142        0x50, 0x47,             /* OVLV4=71  */
 143        0x51, 0xc1,             /* OVLY5=193 */
 144        0x52, 0xe3,             /* OVLU5=227   red */
 145        0x53, 0x54,             /* OVLV5=84  */
 146        0x54, 0xa3,             /* OVLY6=163 */
 147        0x55, 0x54,             /* OVLU6=84    blue */
 148        0x56, 0xf2,             /* OVLV6=242 */
 149        0x57, 0x90,             /* OVLY7=144 */
 150        0x58, 0x00,             /* OVLU7=0     black */
 151        0x59, 0x00,             /* OVLV7=0   */
 152
 153        0x5a, 0x00,             /* CHPS=0    */
 154        0x5b, 0x76,             /* GAINU=118 */
 155        0x5c, 0xa5,             /* GAINV=165 */
 156        0x5d, 0x3c,             /* BLCKL=60  */
 157        0x5e, 0x3a,             /* BLNNL=58  */
 158        0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 159        0x60, 0x00,             /* NULL      */
 160
 161        /* 0x61 - 0x66 set according to norm */
 162
 163        0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 164        0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 165        0x69, 0x00,             /* 0 : caption 1st byte even field */
 166        0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 167
 168        0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 169        0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 170                                 * CBLF=0, ORCV2=0, PRCV2=0 */
 171        0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 172
 173        0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 174                                 * least for PAL */
 175        0x6f, 0x00,             /* HTRIG upper bits */
 176        0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 177
 178        /* The following should not be needed */
 179
 180        0x71, 0x15,             /* BMRQ=0x115 */
 181        0x72, 0x90,             /* EMRQ=0x690 */
 182        0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 183        0x74, 0x00,             /* NULL       */
 184        0x75, 0x00,             /* NULL       */
 185        0x76, 0x00,             /* NULL       */
 186        0x77, 0x15,             /* BRCV=0x115 */
 187        0x78, 0x90,             /* ERCV=0x690 */
 188        0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 189
 190        /* Field length controls */
 191
 192        0x7a, 0x70,             /* FLC=0 */
 193
 194        /* The following should not be needed if SBLN = 1 */
 195
 196        0x7b, 0x16,             /* FAL=22 */
 197        0x7c, 0x35,             /* LAL=244 */
 198        0x7d, 0x20,             /* LAL=244, FAL=22 */
 199};
 200
 201static const unsigned char init_pal[] = {
 202        0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 203                                 * YGS=1, INPI=0, DOWN=0 */
 204        0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 205        0x63, 0xcb,             /* FSC0 */
 206        0x64, 0x8a,             /* FSC1 */
 207        0x65, 0x09,             /* FSC2 */
 208        0x66, 0x2a,             /* FSC3 */
 209};
 210
 211static const unsigned char init_ntsc[] = {
 212        0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 213                                 * YGS=1, INPI=0, DOWN=0 */
 214        0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 215        0x63, 0x1f,             /* FSC0 */
 216        0x64, 0x7c,             /* FSC1 */
 217        0x65, 0xf0,             /* FSC2 */
 218        0x66, 0x21,             /* FSC3 */
 219};
 220
 221
 222static int saa7185_init(struct v4l2_subdev *sd, u32 val)
 223{
 224        struct saa7185 *encoder = to_saa7185(sd);
 225
 226        saa7185_write_block(sd, init_common, sizeof(init_common));
 227        if (encoder->norm & V4L2_STD_NTSC)
 228                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 229        else
 230                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 231        return 0;
 232}
 233
 234static int saa7185_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 235{
 236        struct saa7185 *encoder = to_saa7185(sd);
 237
 238        if (std & V4L2_STD_NTSC)
 239                saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 240        else if (std & V4L2_STD_PAL)
 241                saa7185_write_block(sd, init_pal, sizeof(init_pal));
 242        else
 243                return -EINVAL;
 244        encoder->norm = std;
 245        return 0;
 246}
 247
 248static int saa7185_s_routing(struct v4l2_subdev *sd,
 249                             u32 input, u32 output, u32 config)
 250{
 251        struct saa7185 *encoder = to_saa7185(sd);
 252
 253        /* RJ: input = 0: input is from SA7111
 254         input = 1: input is from ZR36060 */
 255
 256        switch (input) {
 257        case 0:
 258                /* turn off colorbar */
 259                saa7185_write(sd, 0x3a, 0x0f);
 260                /* Switch RTCE to 1 */
 261                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 262                saa7185_write(sd, 0x6e, 0x01);
 263                break;
 264
 265        case 1:
 266                /* turn off colorbar */
 267                saa7185_write(sd, 0x3a, 0x0f);
 268                /* Switch RTCE to 0 */
 269                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x00);
 270                /* SW: a slight sync problem... */
 271                saa7185_write(sd, 0x6e, 0x00);
 272                break;
 273
 274        case 2:
 275                /* turn on colorbar */
 276                saa7185_write(sd, 0x3a, 0x8f);
 277                /* Switch RTCE to 0 */
 278                saa7185_write(sd, 0x61, (encoder->reg[0x61] & 0xf7) | 0x08);
 279                /* SW: a slight sync problem... */
 280                saa7185_write(sd, 0x6e, 0x01);
 281                break;
 282
 283        default:
 284                return -EINVAL;
 285        }
 286        return 0;
 287}
 288
 289static int saa7185_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
 290{
 291        struct i2c_client *client = v4l2_get_subdevdata(sd);
 292
 293        return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_SAA7185, 0);
 294}
 295
 296/* ----------------------------------------------------------------------- */
 297
 298static const struct v4l2_subdev_core_ops saa7185_core_ops = {
 299        .g_chip_ident = saa7185_g_chip_ident,
 300        .init = saa7185_init,
 301};
 302
 303static const struct v4l2_subdev_video_ops saa7185_video_ops = {
 304        .s_std_output = saa7185_s_std_output,
 305        .s_routing = saa7185_s_routing,
 306};
 307
 308static const struct v4l2_subdev_ops saa7185_ops = {
 309        .core = &saa7185_core_ops,
 310        .video = &saa7185_video_ops,
 311};
 312
 313
 314/* ----------------------------------------------------------------------- */
 315
 316static int saa7185_probe(struct i2c_client *client,
 317                        const struct i2c_device_id *id)
 318{
 319        int i;
 320        struct saa7185 *encoder;
 321        struct v4l2_subdev *sd;
 322
 323        /* Check if the adapter supports the needed features */
 324        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 325                return -ENODEV;
 326
 327        v4l_info(client, "chip found @ 0x%x (%s)\n",
 328                        client->addr << 1, client->adapter->name);
 329
 330        encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 331        if (encoder == NULL)
 332                return -ENOMEM;
 333        encoder->norm = V4L2_STD_NTSC;
 334        sd = &encoder->sd;
 335        v4l2_i2c_subdev_init(sd, client, &saa7185_ops);
 336
 337        i = saa7185_write_block(sd, init_common, sizeof(init_common));
 338        if (i >= 0)
 339                i = saa7185_write_block(sd, init_ntsc, sizeof(init_ntsc));
 340        if (i < 0)
 341                v4l2_dbg(1, debug, sd, "init error %d\n", i);
 342        else
 343                v4l2_dbg(1, debug, sd, "revision 0x%x\n",
 344                                saa7185_read(sd) >> 5);
 345        return 0;
 346}
 347
 348static int saa7185_remove(struct i2c_client *client)
 349{
 350        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 351        struct saa7185 *encoder = to_saa7185(sd);
 352
 353        v4l2_device_unregister_subdev(sd);
 354        /* SW: output off is active */
 355        saa7185_write(sd, 0x61, (encoder->reg[0x61]) | 0x40);
 356        kfree(encoder);
 357        return 0;
 358}
 359
 360/* ----------------------------------------------------------------------- */
 361
 362static const struct i2c_device_id saa7185_id[] = {
 363        { "saa7185", 0 },
 364        { }
 365};
 366MODULE_DEVICE_TABLE(i2c, saa7185_id);
 367
 368static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 369        .name = "saa7185",
 370        .probe = saa7185_probe,
 371        .remove = saa7185_remove,
 372        .id_table = saa7185_id,
 373};
 374