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/init.h>
  29#include <linux/delay.h>
  30#include <linux/errno.h>
  31#include <linux/fs.h>
  32#include <linux/kernel.h>
  33#include <linux/major.h>
  34#include <linux/slab.h>
  35#include <linux/mm.h>
  36#include <linux/signal.h>
  37#include <linux/types.h>
  38#include <linux/i2c.h>
  39#include <asm/io.h>
  40#include <asm/pgtable.h>
  41#include <asm/page.h>
  42#include <asm/uaccess.h>
  43
  44#include <linux/videodev.h>
  45#include <linux/video_encoder.h>
  46
  47MODULE_DESCRIPTION("Philips SAA7185 video encoder driver");
  48MODULE_AUTHOR("Dave Perks");
  49MODULE_LICENSE("GPL");
  50
  51
  52#define I2C_NAME(s) (s)->name
  53
  54
  55static int debug = 0;
  56module_param(debug, int, 0);
  57MODULE_PARM_DESC(debug, "Debug level (0-1)");
  58
  59#define dprintk(num, format, args...) \
  60        do { \
  61                if (debug >= num) \
  62                        printk(format, ##args); \
  63        } while (0)
  64
  65/* ----------------------------------------------------------------------- */
  66
  67struct saa7185 {
  68        unsigned char reg[128];
  69
  70        int norm;
  71        int enable;
  72        int bright;
  73        int contrast;
  74        int hue;
  75        int sat;
  76};
  77
  78#define   I2C_SAA7185        0x88
  79
  80/* ----------------------------------------------------------------------- */
  81
  82static inline int
  83saa7185_read (struct i2c_client *client)
  84{
  85        return i2c_smbus_read_byte(client);
  86}
  87
  88static int
  89saa7185_write (struct i2c_client *client,
  90               u8                 reg,
  91               u8                 value)
  92{
  93        struct saa7185 *encoder = i2c_get_clientdata(client);
  94
  95        dprintk(1, KERN_DEBUG "SAA7185: %02x set to %02x\n", reg, value);
  96        encoder->reg[reg] = value;
  97        return i2c_smbus_write_byte_data(client, reg, value);
  98}
  99
 100static int
 101saa7185_write_block (struct i2c_client *client,
 102                     const u8          *data,
 103                     unsigned int       len)
 104{
 105        int ret = -1;
 106        u8 reg;
 107
 108        /* the adv7175 has an autoincrement function, use it if
 109         * the adapter understands raw I2C */
 110        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
 111                /* do raw I2C, not smbus compatible */
 112                struct saa7185 *encoder = i2c_get_clientdata(client);
 113                u8 block_data[32];
 114                int block_len;
 115
 116                while (len >= 2) {
 117                        block_len = 0;
 118                        block_data[block_len++] = reg = data[0];
 119                        do {
 120                                block_data[block_len++] =
 121                                    encoder->reg[reg++] = data[1];
 122                                len -= 2;
 123                                data += 2;
 124                        } while (len >= 2 && data[0] == reg &&
 125                                 block_len < 32);
 126                        if ((ret = i2c_master_send(client, block_data,
 127                                                   block_len)) < 0)
 128                                break;
 129                }
 130        } else {
 131                /* do some slow I2C emulation kind of thing */
 132                while (len >= 2) {
 133                        reg = *data++;
 134                        if ((ret = saa7185_write(client, reg,
 135                                                 *data++)) < 0)
 136                                break;
 137                        len -= 2;
 138                }
 139        }
 140
 141        return ret;
 142}
 143
 144/* ----------------------------------------------------------------------- */
 145
 146static const unsigned char init_common[] = {
 147        0x3a, 0x0f,             /* CBENB=0, V656=0, VY2C=1,
 148                                 * YUV2C=1, MY2C=1, MUV2C=1 */
 149
 150        0x42, 0x6b,             /* OVLY0=107 */
 151        0x43, 0x00,             /* OVLU0=0     white */
 152        0x44, 0x00,             /* OVLV0=0   */
 153        0x45, 0x22,             /* OVLY1=34  */
 154        0x46, 0xac,             /* OVLU1=172   yellow */
 155        0x47, 0x0e,             /* OVLV1=14  */
 156        0x48, 0x03,             /* OVLY2=3   */
 157        0x49, 0x1d,             /* OVLU2=29    cyan */
 158        0x4a, 0xac,             /* OVLV2=172 */
 159        0x4b, 0xf0,             /* OVLY3=240 */
 160        0x4c, 0xc8,             /* OVLU3=200   green */
 161        0x4d, 0xb9,             /* OVLV3=185 */
 162        0x4e, 0xd4,             /* OVLY4=212 */
 163        0x4f, 0x38,             /* OVLU4=56    magenta */
 164        0x50, 0x47,             /* OVLV4=71  */
 165        0x51, 0xc1,             /* OVLY5=193 */
 166        0x52, 0xe3,             /* OVLU5=227   red */
 167        0x53, 0x54,             /* OVLV5=84  */
 168        0x54, 0xa3,             /* OVLY6=163 */
 169        0x55, 0x54,             /* OVLU6=84    blue */
 170        0x56, 0xf2,             /* OVLV6=242 */
 171        0x57, 0x90,             /* OVLY7=144 */
 172        0x58, 0x00,             /* OVLU7=0     black */
 173        0x59, 0x00,             /* OVLV7=0   */
 174
 175        0x5a, 0x00,             /* CHPS=0    */
 176        0x5b, 0x76,             /* GAINU=118 */
 177        0x5c, 0xa5,             /* GAINV=165 */
 178        0x5d, 0x3c,             /* BLCKL=60  */
 179        0x5e, 0x3a,             /* BLNNL=58  */
 180        0x5f, 0x3a,             /* CCRS=0, BLNVB=58 */
 181        0x60, 0x00,             /* NULL      */
 182
 183        /* 0x61 - 0x66 set according to norm */
 184
 185        0x67, 0x00,             /* 0 : caption 1st byte odd  field */
 186        0x68, 0x00,             /* 0 : caption 2nd byte odd  field */
 187        0x69, 0x00,             /* 0 : caption 1st byte even field */
 188        0x6a, 0x00,             /* 0 : caption 2nd byte even field */
 189
 190        0x6b, 0x91,             /* MODIN=2, PCREF=0, SCCLN=17 */
 191        0x6c, 0x20,             /* SRCV1=0, TRCV2=1, ORCV1=0, PRCV1=0,
 192                                 * CBLF=0, ORCV2=0, PRCV2=0 */
 193        0x6d, 0x00,             /* SRCM1=0, CCEN=0 */
 194
 195        0x6e, 0x0e,             /* HTRIG=0x005, approx. centered, at
 196                                 * least for PAL */
 197        0x6f, 0x00,             /* HTRIG upper bits */
 198        0x70, 0x20,             /* PHRES=0, SBLN=1, VTRIG=0 */
 199
 200        /* The following should not be needed */
 201
 202        0x71, 0x15,             /* BMRQ=0x115 */
 203        0x72, 0x90,             /* EMRQ=0x690 */
 204        0x73, 0x61,             /* EMRQ=0x690, BMRQ=0x115 */
 205        0x74, 0x00,             /* NULL       */
 206        0x75, 0x00,             /* NULL       */
 207        0x76, 0x00,             /* NULL       */
 208        0x77, 0x15,             /* BRCV=0x115 */
 209        0x78, 0x90,             /* ERCV=0x690 */
 210        0x79, 0x61,             /* ERCV=0x690, BRCV=0x115 */
 211
 212        /* Field length controls */
 213
 214        0x7a, 0x70,             /* FLC=0 */
 215
 216        /* The following should not be needed if SBLN = 1 */
 217
 218        0x7b, 0x16,             /* FAL=22 */
 219        0x7c, 0x35,             /* LAL=244 */
 220        0x7d, 0x20,             /* LAL=244, FAL=22 */
 221};
 222
 223static const unsigned char init_pal[] = {
 224        0x61, 0x1e,             /* FISE=0, PAL=1, SCBW=1, RTCE=1,
 225                                 * YGS=1, INPI=0, DOWN=0 */
 226        0x62, 0xc8,             /* DECTYP=1, BSTA=72 */
 227        0x63, 0xcb,             /* FSC0 */
 228        0x64, 0x8a,             /* FSC1 */
 229        0x65, 0x09,             /* FSC2 */
 230        0x66, 0x2a,             /* FSC3 */
 231};
 232
 233static const unsigned char init_ntsc[] = {
 234        0x61, 0x1d,             /* FISE=1, PAL=0, SCBW=1, RTCE=1,
 235                                 * YGS=1, INPI=0, DOWN=0 */
 236        0x62, 0xe6,             /* DECTYP=1, BSTA=102 */
 237        0x63, 0x1f,             /* FSC0 */
 238        0x64, 0x7c,             /* FSC1 */
 239        0x65, 0xf0,             /* FSC2 */
 240        0x66, 0x21,             /* FSC3 */
 241};
 242
 243static int
 244saa7185_command (struct i2c_client *client,
 245                 unsigned int       cmd,
 246                 void              *arg)
 247{
 248        struct saa7185 *encoder = i2c_get_clientdata(client);
 249
 250        switch (cmd) {
 251
 252        case 0:
 253                saa7185_write_block(client, init_common,
 254                                    sizeof(init_common));
 255                switch (encoder->norm) {
 256
 257                case VIDEO_MODE_NTSC:
 258                        saa7185_write_block(client, init_ntsc,
 259                                            sizeof(init_ntsc));
 260                        break;
 261
 262                case VIDEO_MODE_PAL:
 263                        saa7185_write_block(client, init_pal,
 264                                            sizeof(init_pal));
 265                        break;
 266                }
 267
 268                break;
 269
 270        case ENCODER_GET_CAPABILITIES:
 271        {
 272                struct video_encoder_capability *cap = arg;
 273
 274                cap->flags =
 275                    VIDEO_ENCODER_PAL | VIDEO_ENCODER_NTSC |
 276                    VIDEO_ENCODER_SECAM | VIDEO_ENCODER_CCIR;
 277                cap->inputs = 1;
 278                cap->outputs = 1;
 279        }
 280                break;
 281
 282        case ENCODER_SET_NORM:
 283        {
 284                int *iarg = arg;
 285
 286                //saa7185_write_block(client, init_common, sizeof(init_common));
 287
 288                switch (*iarg) {
 289
 290                case VIDEO_MODE_NTSC:
 291                        saa7185_write_block(client, init_ntsc,
 292                                            sizeof(init_ntsc));
 293                        break;
 294
 295                case VIDEO_MODE_PAL:
 296                        saa7185_write_block(client, init_pal,
 297                                            sizeof(init_pal));
 298                        break;
 299
 300                case VIDEO_MODE_SECAM:
 301                default:
 302                        return -EINVAL;
 303
 304                }
 305                encoder->norm = *iarg;
 306        }
 307                break;
 308
 309        case ENCODER_SET_INPUT:
 310        {
 311                int *iarg = arg;
 312
 313                /* RJ: *iarg = 0: input is from SA7111
 314                 *iarg = 1: input is from ZR36060 */
 315
 316                switch (*iarg) {
 317
 318                case 0:
 319                        /* Switch RTCE to 1 */
 320                        saa7185_write(client, 0x61,
 321                                      (encoder->reg[0x61] & 0xf7) | 0x08);
 322                        saa7185_write(client, 0x6e, 0x01);
 323                        break;
 324
 325                case 1:
 326                        /* Switch RTCE to 0 */
 327                        saa7185_write(client, 0x61,
 328                                      (encoder->reg[0x61] & 0xf7) | 0x00);
 329                        /* SW: a slight sync problem... */
 330                        saa7185_write(client, 0x6e, 0x00);
 331                        break;
 332
 333                default:
 334                        return -EINVAL;
 335
 336                }
 337        }
 338                break;
 339
 340        case ENCODER_SET_OUTPUT:
 341        {
 342                int *iarg = arg;
 343
 344                /* not much choice of outputs */
 345                if (*iarg != 0) {
 346                        return -EINVAL;
 347                }
 348        }
 349                break;
 350
 351        case ENCODER_ENABLE_OUTPUT:
 352        {
 353                int *iarg = arg;
 354
 355                encoder->enable = !!*iarg;
 356                saa7185_write(client, 0x61,
 357                              (encoder->reg[0x61] & 0xbf) |
 358                              (encoder->enable ? 0x00 : 0x40));
 359        }
 360                break;
 361
 362        default:
 363                return -EINVAL;
 364        }
 365
 366        return 0;
 367}
 368
 369/* ----------------------------------------------------------------------- */
 370
 371/*
 372 * Generic i2c probe
 373 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
 374 */
 375static unsigned short normal_i2c[] = { I2C_SAA7185 >> 1, I2C_CLIENT_END };
 376
 377static unsigned short ignore = I2C_CLIENT_END;
 378
 379static struct i2c_client_address_data addr_data = {
 380        .normal_i2c             = normal_i2c,
 381        .probe                  = &ignore,
 382        .ignore                 = &ignore,
 383};
 384
 385static struct i2c_driver i2c_driver_saa7185;
 386
 387static int
 388saa7185_detect_client (struct i2c_adapter *adapter,
 389                       int                 address,
 390                       int                 kind)
 391{
 392        int i;
 393        struct i2c_client *client;
 394        struct saa7185 *encoder;
 395
 396        dprintk(1,
 397                KERN_INFO
 398                "saa7185.c: detecting saa7185 client on address 0x%x\n",
 399                address << 1);
 400
 401        /* Check if the adapter supports the needed features */
 402        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 403                return 0;
 404
 405        client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
 406        if (client == 0)
 407                return -ENOMEM;
 408        client->addr = address;
 409        client->adapter = adapter;
 410        client->driver = &i2c_driver_saa7185;
 411        strlcpy(I2C_NAME(client), "saa7185", sizeof(I2C_NAME(client)));
 412
 413        encoder = kzalloc(sizeof(struct saa7185), GFP_KERNEL);
 414        if (encoder == NULL) {
 415                kfree(client);
 416                return -ENOMEM;
 417        }
 418        encoder->norm = VIDEO_MODE_NTSC;
 419        encoder->enable = 1;
 420        i2c_set_clientdata(client, encoder);
 421
 422        i = i2c_attach_client(client);
 423        if (i) {
 424                kfree(client);
 425                kfree(encoder);
 426                return i;
 427        }
 428
 429        i = saa7185_write_block(client, init_common, sizeof(init_common));
 430        if (i >= 0) {
 431                i = saa7185_write_block(client, init_ntsc,
 432                                        sizeof(init_ntsc));
 433        }
 434        if (i < 0) {
 435                dprintk(1, KERN_ERR "%s_attach: init error %d\n",
 436                        I2C_NAME(client), i);
 437        } else {
 438                dprintk(1,
 439                        KERN_INFO
 440                        "%s_attach: chip version %d at address 0x%x\n",
 441                        I2C_NAME(client), saa7185_read(client) >> 5,
 442                        client->addr << 1);
 443        }
 444
 445        return 0;
 446}
 447
 448static int
 449saa7185_attach_adapter (struct i2c_adapter *adapter)
 450{
 451        dprintk(1,
 452                KERN_INFO
 453                "saa7185.c: starting probe for adapter %s (0x%x)\n",
 454                I2C_NAME(adapter), adapter->id);
 455        return i2c_probe(adapter, &addr_data, &saa7185_detect_client);
 456}
 457
 458static int
 459saa7185_detach_client (struct i2c_client *client)
 460{
 461        struct saa7185 *encoder = i2c_get_clientdata(client);
 462        int err;
 463
 464        err = i2c_detach_client(client);
 465        if (err) {
 466                return err;
 467        }
 468
 469        saa7185_write(client, 0x61, (encoder->reg[0x61]) | 0x40);       /* SW: output off is active */
 470        //saa7185_write(client, 0x3a, (encoder->reg[0x3a]) | 0x80); /* SW: color bar */
 471
 472        kfree(encoder);
 473        kfree(client);
 474
 475        return 0;
 476}
 477
 478/* ----------------------------------------------------------------------- */
 479
 480static struct i2c_driver i2c_driver_saa7185 = {
 481        .driver = {
 482                .name = "saa7185",      /* name */
 483        },
 484
 485        .id = I2C_DRIVERID_SAA7185B,
 486
 487        .attach_adapter = saa7185_attach_adapter,
 488        .detach_client = saa7185_detach_client,
 489        .command = saa7185_command,
 490};
 491
 492static int __init
 493saa7185_init (void)
 494{
 495        return i2c_add_driver(&i2c_driver_saa7185);
 496}
 497
 498static void __exit
 499saa7185_exit (void)
 500{
 501        i2c_del_driver(&i2c_driver_saa7185);
 502}
 503
 504module_init(saa7185_init);
 505module_exit(saa7185_exit);
 506