LXR linux/drivers/media/i2c/adv7175.c

   1/*
   2 *  adv7175 - adv7175a video encoder driver version 0.0.3
   3 *
   4 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   5 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   6 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   7 *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   8 *
   9 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  10 *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  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("Analog Devices ADV7175 video encoder driver");
  37MODULE_AUTHOR("Dave Perks");
  38MODULE_LICENSE("GPL");
  39
  40#define   I2C_ADV7175        0xd4
  41#define   I2C_ADV7176        0x54
  42
  43
  44static int debug;
  45module_param(debug, int, 0);
  46MODULE_PARM_DESC(debug, "Debug level (0-1)");
  47
  48/* ----------------------------------------------------------------------- */
  49
  50struct adv7175 {
  51        struct v4l2_subdev sd;
  52        v4l2_std_id norm;
  53        int input;
  54};
  55
  56static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  57{
  58        return container_of(sd, struct adv7175, sd);
  59}
  60
  61static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  62
  63static enum v4l2_mbus_pixelcode adv7175_codes[] = {
  64        V4L2_MBUS_FMT_UYVY8_2X8,
  65        V4L2_MBUS_FMT_UYVY8_1X16,
  66};
  67
  68/* ----------------------------------------------------------------------- */
  69
  70static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  71{
  72        struct i2c_client *client = v4l2_get_subdevdata(sd);
  73
  74        return i2c_smbus_write_byte_data(client, reg, value);
  75}
  76
  77static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  78{
  79        struct i2c_client *client = v4l2_get_subdevdata(sd);
  80
  81        return i2c_smbus_read_byte_data(client, reg);
  82}
  83
  84static int adv7175_write_block(struct v4l2_subdev *sd,
  85                     const u8 *data, unsigned int len)
  86{
  87        struct i2c_client *client = v4l2_get_subdevdata(sd);
  88        int ret = -1;
  89        u8 reg;
  90
  91        /* the adv7175 has an autoincrement function, use it if
  92         * the adapter understands raw I2C */
  93        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  94                /* do raw I2C, not smbus compatible */
  95                u8 block_data[32];
  96                int block_len;
  97
  98                while (len >= 2) {
  99                        block_len = 0;
 100                        block_data[block_len++] = reg = data[0];
 101                        do {
 102                                block_data[block_len++] = data[1];
 103                                reg++;
 104                                len -= 2;
 105                                data += 2;
 106                        } while (len >= 2 && data[0] == reg && block_len < 32);
 107                        ret = i2c_master_send(client, block_data, block_len);
 108                        if (ret < 0)
 109                                break;
 110                }
 111        } else {
 112                /* do some slow I2C emulation kind of thing */
 113                while (len >= 2) {
 114                        reg = *data++;
 115                        ret = adv7175_write(sd, reg, *data++);
 116                        if (ret < 0)
 117                                break;
 118                        len -= 2;
 119                }
 120        }
 121
 122        return ret;
 123}
 124
 125static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 126{
 127        /* for some reason pass_through NTSC needs
 128         * a different sub-carrier freq to remain stable. */
 129        if (pass_through)
 130                adv7175_write(sd, 0x02, 0x00);
 131        else
 132                adv7175_write(sd, 0x02, 0x55);
 133
 134        adv7175_write(sd, 0x03, 0x55);
 135        adv7175_write(sd, 0x04, 0x55);
 136        adv7175_write(sd, 0x05, 0x25);
 137}
 138
 139/* ----------------------------------------------------------------------- */
 140/* Output filter:  S-Video  Composite */
 141
 142#define MR050       0x11        /* 0x09 */
 143#define MR060       0x14        /* 0x0c */
 144
 145/* ----------------------------------------------------------------------- */
 146
 147#define TR0MODE     0x46
 148#define TR0RST      0x80
 149
 150#define TR1CAPT     0x80
 151#define TR1PLAY     0x00
 152
 153static const unsigned char init_common[] = {
 154
 155        0x00, MR050,            /* MR0, PAL enabled */
 156        0x01, 0x00,             /* MR1 */
 157        0x02, 0x0c,             /* subc. freq. */
 158        0x03, 0x8c,             /* subc. freq. */
 159        0x04, 0x79,             /* subc. freq. */
 160        0x05, 0x26,             /* subc. freq. */
 161        0x06, 0x40,             /* subc. phase */
 162
 163        0x07, TR0MODE,          /* TR0, 16bit */
 164        0x08, 0x21,             /*  */
 165        0x09, 0x00,             /*  */
 166        0x0a, 0x00,             /*  */
 167        0x0b, 0x00,             /*  */
 168        0x0c, TR1CAPT,          /* TR1 */
 169        0x0d, 0x4f,             /* MR2 */
 170        0x0e, 0x00,             /*  */
 171        0x0f, 0x00,             /*  */
 172        0x10, 0x00,             /*  */
 173        0x11, 0x00,             /*  */
 174};
 175
 176static const unsigned char init_pal[] = {
 177        0x00, MR050,            /* MR0, PAL enabled */
 178        0x01, 0x00,             /* MR1 */
 179        0x02, 0x0c,             /* subc. freq. */
 180        0x03, 0x8c,             /* subc. freq. */
 181        0x04, 0x79,             /* subc. freq. */
 182        0x05, 0x26,             /* subc. freq. */
 183        0x06, 0x40,             /* subc. phase */
 184};
 185
 186static const unsigned char init_ntsc[] = {
 187        0x00, MR060,            /* MR0, NTSC enabled */
 188        0x01, 0x00,             /* MR1 */
 189        0x02, 0x55,             /* subc. freq. */
 190        0x03, 0x55,             /* subc. freq. */
 191        0x04, 0x55,             /* subc. freq. */
 192        0x05, 0x25,             /* subc. freq. */
 193        0x06, 0x1a,             /* subc. phase */
 194};
 195
 196static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 197{
 198        /* This is just for testing!!! */
 199        adv7175_write_block(sd, init_common, sizeof(init_common));
 200        adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 201        adv7175_write(sd, 0x07, TR0MODE);
 202        return 0;
 203}
 204
 205static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 206{
 207        struct adv7175 *encoder = to_adv7175(sd);
 208
 209        if (std & V4L2_STD_NTSC) {
 210                adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 211                if (encoder->input == 0)
 212                        adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 213                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 214                adv7175_write(sd, 0x07, TR0MODE);
 215        } else if (std & V4L2_STD_PAL) {
 216                adv7175_write_block(sd, init_pal, sizeof(init_pal));
 217                if (encoder->input == 0)
 218                        adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 219                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 220                adv7175_write(sd, 0x07, TR0MODE);
 221        } else if (std & V4L2_STD_SECAM) {
 222                /* This is an attempt to convert
 223                 * SECAM->PAL (typically it does not work
 224                 * due to genlock: when decoder is in SECAM
 225                 * and encoder in in PAL the subcarrier can
 226                 * not be syncronized with horizontal
 227                 * quency) */
 228                adv7175_write_block(sd, init_pal, sizeof(init_pal));
 229                if (encoder->input == 0)
 230                        adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 231                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 232                adv7175_write(sd, 0x07, TR0MODE);
 233        } else {
 234                v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 235                                (unsigned long long)std);
 236                return -EINVAL;
 237        }
 238        v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 239        encoder->norm = std;
 240        return 0;
 241}
 242
 243static int adv7175_s_routing(struct v4l2_subdev *sd,
 244                             u32 input, u32 output, u32 config)
 245{
 246        struct adv7175 *encoder = to_adv7175(sd);
 247
 248        /* RJ: input = 0: input is from decoder
 249           input = 1: input is from ZR36060
 250           input = 2: color bar */
 251
 252        switch (input) {
 253        case 0:
 254                adv7175_write(sd, 0x01, 0x00);
 255
 256                if (encoder->norm & V4L2_STD_NTSC)
 257                        set_subcarrier_freq(sd, 1);
 258
 259                adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 260                if (encoder->norm & V4L2_STD_SECAM)
 261                        adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 262                else
 263                        adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 264                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 265                adv7175_write(sd, 0x07, TR0MODE);
 266                /*udelay(10);*/
 267                break;
 268
 269        case 1:
 270                adv7175_write(sd, 0x01, 0x00);
 271
 272                if (encoder->norm & V4L2_STD_NTSC)
 273                        set_subcarrier_freq(sd, 0);
 274
 275                adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 276                adv7175_write(sd, 0x0d, 0x49);
 277                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 278                adv7175_write(sd, 0x07, TR0MODE);
 279                /* udelay(10); */
 280                break;
 281
 282        case 2:
 283                adv7175_write(sd, 0x01, 0x80);
 284
 285                if (encoder->norm & V4L2_STD_NTSC)
 286                        set_subcarrier_freq(sd, 0);
 287
 288                adv7175_write(sd, 0x0d, 0x49);
 289                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 290                adv7175_write(sd, 0x07, TR0MODE);
 291                /* udelay(10); */
 292                break;
 293
 294        default:
 295                v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 296                return -EINVAL;
 297        }
 298        v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 299        encoder->input = input;
 300        return 0;
 301}
 302
 303static int adv7175_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
 304                                enum v4l2_mbus_pixelcode *code)
 305{
 306        if (index >= ARRAY_SIZE(adv7175_codes))
 307                return -EINVAL;
 308
 309        *code = adv7175_codes[index];
 310        return 0;
 311}
 312
 313static int adv7175_g_fmt(struct v4l2_subdev *sd,
 314                                struct v4l2_mbus_framefmt *mf)
 315{
 316        u8 val = adv7175_read(sd, 0x7);
 317
 318        if ((val & 0x40) == (1 << 6))
 319                mf->code = V4L2_MBUS_FMT_UYVY8_1X16;
 320        else
 321                mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
 322
 323        mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 324        mf->width       = 0;
 325        mf->height      = 0;
 326        mf->field       = V4L2_FIELD_ANY;
 327
 328        return 0;
 329}
 330
 331static int adv7175_s_fmt(struct v4l2_subdev *sd,
 332                                struct v4l2_mbus_framefmt *mf)
 333{
 334        u8 val = adv7175_read(sd, 0x7);
 335        int ret;
 336
 337        switch (mf->code) {
 338        case V4L2_MBUS_FMT_UYVY8_2X8:
 339                val &= ~0x40;
 340                break;
 341
 342        case V4L2_MBUS_FMT_UYVY8_1X16:
 343                val |= 0x40;
 344                break;
 345
 346        default:
 347                v4l2_dbg(1, debug, sd,
 348                        "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 349                return -EINVAL;
 350        }
 351
 352        ret = adv7175_write(sd, 0x7, val);
 353
 354        return ret;
 355}
 356
 357static int adv7175_s_power(struct v4l2_subdev *sd, int on)
 358{
 359        if (on)
 360                adv7175_write(sd, 0x01, 0x00);
 361        else
 362                adv7175_write(sd, 0x01, 0x78);
 363
 364        return 0;
 365}
 366
 367/* ----------------------------------------------------------------------- */
 368
 369static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 370        .init = adv7175_init,
 371        .s_power = adv7175_s_power,
 372};
 373
 374static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 375        .s_std_output = adv7175_s_std_output,
 376        .s_routing = adv7175_s_routing,
 377        .s_mbus_fmt = adv7175_s_fmt,
 378        .g_mbus_fmt = adv7175_g_fmt,
 379        .enum_mbus_fmt  = adv7175_enum_fmt,
 380};
 381
 382static const struct v4l2_subdev_ops adv7175_ops = {
 383        .core = &adv7175_core_ops,
 384        .video = &adv7175_video_ops,
 385};
 386
 387/* ----------------------------------------------------------------------- */
 388
 389static int adv7175_probe(struct i2c_client *client,
 390                        const struct i2c_device_id *id)
 391{
 392        int i;
 393        struct adv7175 *encoder;
 394        struct v4l2_subdev *sd;
 395
 396        /* Check if the adapter supports the needed features */
 397        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 398                return -ENODEV;
 399
 400        v4l_info(client, "chip found @ 0x%x (%s)\n",
 401                        client->addr << 1, client->adapter->name);
 402
 403        encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 404        if (encoder == NULL)
 405                return -ENOMEM;
 406        sd = &encoder->sd;
 407        v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 408        encoder->norm = V4L2_STD_NTSC;
 409        encoder->input = 0;
 410
 411        i = adv7175_write_block(sd, init_common, sizeof(init_common));
 412        if (i >= 0) {
 413                i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 414                i = adv7175_write(sd, 0x07, TR0MODE);
 415                i = adv7175_read(sd, 0x12);
 416                v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 417        }
 418        if (i < 0)
 419                v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 420        return 0;
 421}
 422
 423static int adv7175_remove(struct i2c_client *client)
 424{
 425        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 426
 427        v4l2_device_unregister_subdev(sd);
 428        return 0;
 429}
 430
 431/* ----------------------------------------------------------------------- */
 432
 433static const struct i2c_device_id adv7175_id[] = {
 434        { "adv7175", 0 },
 435        { "adv7176", 0 },
 436        { }
 437};
 438MODULE_DEVICE_TABLE(i2c, adv7175_id);
 439
 440static struct i2c_driver adv7175_driver = {
 441        .driver = {
 442                .owner  = THIS_MODULE,
 443                .name   = "adv7175",
 444        },
 445        .probe          = adv7175_probe,
 446        .remove         = adv7175_remove,
 447        .id_table       = adv7175_id,
 448};
 449
 450module_i2c_driver(adv7175_driver);
 451