linux/drivers/media/i2c/adv7175.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 *  adv7175 - adv7175a video encoder driver version 0.0.3
   4 *
   5 * Copyright (C) 1998 Dave Perks <dperks@ibm.net>
   6 * Copyright (C) 1999 Wolfgang Scherr <scherr@net4you.net>
   7 * Copyright (C) 2000 Serguei Miridonov <mirsev@cicese.mx>
   8 *    - some corrections for Pinnacle Systems Inc. DC10plus card.
   9 *
  10 * Changes by Ronald Bultje <rbultje@ronald.bitfreak.net>
  11 *    - moved over to linux>=2.4.x i2c protocol (9/9/2002)
  12 */
  13
  14#include <linux/module.h>
  15#include <linux/types.h>
  16#include <linux/slab.h>
  17#include <linux/ioctl.h>
  18#include <linux/uaccess.h>
  19#include <linux/i2c.h>
  20#include <linux/videodev2.h>
  21#include <media/v4l2-device.h>
  22
  23MODULE_DESCRIPTION("Analog Devices ADV7175 video encoder driver");
  24MODULE_AUTHOR("Dave Perks");
  25MODULE_LICENSE("GPL");
  26
  27#define   I2C_ADV7175        0xd4
  28#define   I2C_ADV7176        0x54
  29
  30
  31static int debug;
  32module_param(debug, int, 0);
  33MODULE_PARM_DESC(debug, "Debug level (0-1)");
  34
  35/* ----------------------------------------------------------------------- */
  36
  37struct adv7175 {
  38        struct v4l2_subdev sd;
  39        v4l2_std_id norm;
  40        int input;
  41};
  42
  43static inline struct adv7175 *to_adv7175(struct v4l2_subdev *sd)
  44{
  45        return container_of(sd, struct adv7175, sd);
  46}
  47
  48static char *inputs[] = { "pass_through", "play_back", "color_bar" };
  49
  50static u32 adv7175_codes[] = {
  51        MEDIA_BUS_FMT_UYVY8_2X8,
  52        MEDIA_BUS_FMT_UYVY8_1X16,
  53};
  54
  55/* ----------------------------------------------------------------------- */
  56
  57static inline int adv7175_write(struct v4l2_subdev *sd, u8 reg, u8 value)
  58{
  59        struct i2c_client *client = v4l2_get_subdevdata(sd);
  60
  61        return i2c_smbus_write_byte_data(client, reg, value);
  62}
  63
  64static inline int adv7175_read(struct v4l2_subdev *sd, u8 reg)
  65{
  66        struct i2c_client *client = v4l2_get_subdevdata(sd);
  67
  68        return i2c_smbus_read_byte_data(client, reg);
  69}
  70
  71static int adv7175_write_block(struct v4l2_subdev *sd,
  72                     const u8 *data, unsigned int len)
  73{
  74        struct i2c_client *client = v4l2_get_subdevdata(sd);
  75        int ret = -1;
  76        u8 reg;
  77
  78        /* the adv7175 has an autoincrement function, use it if
  79         * the adapter understands raw I2C */
  80        if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
  81                /* do raw I2C, not smbus compatible */
  82                u8 block_data[32];
  83                int block_len;
  84
  85                while (len >= 2) {
  86                        block_len = 0;
  87                        block_data[block_len++] = reg = data[0];
  88                        do {
  89                                block_data[block_len++] = data[1];
  90                                reg++;
  91                                len -= 2;
  92                                data += 2;
  93                        } while (len >= 2 && data[0] == reg && block_len < 32);
  94                        ret = i2c_master_send(client, block_data, block_len);
  95                        if (ret < 0)
  96                                break;
  97                }
  98        } else {
  99                /* do some slow I2C emulation kind of thing */
 100                while (len >= 2) {
 101                        reg = *data++;
 102                        ret = adv7175_write(sd, reg, *data++);
 103                        if (ret < 0)
 104                                break;
 105                        len -= 2;
 106                }
 107        }
 108
 109        return ret;
 110}
 111
 112static void set_subcarrier_freq(struct v4l2_subdev *sd, int pass_through)
 113{
 114        /* for some reason pass_through NTSC needs
 115         * a different sub-carrier freq to remain stable. */
 116        if (pass_through)
 117                adv7175_write(sd, 0x02, 0x00);
 118        else
 119                adv7175_write(sd, 0x02, 0x55);
 120
 121        adv7175_write(sd, 0x03, 0x55);
 122        adv7175_write(sd, 0x04, 0x55);
 123        adv7175_write(sd, 0x05, 0x25);
 124}
 125
 126/* ----------------------------------------------------------------------- */
 127/* Output filter:  S-Video  Composite */
 128
 129#define MR050       0x11        /* 0x09 */
 130#define MR060       0x14        /* 0x0c */
 131
 132/* ----------------------------------------------------------------------- */
 133
 134#define TR0MODE     0x46
 135#define TR0RST      0x80
 136
 137#define TR1CAPT     0x80
 138#define TR1PLAY     0x00
 139
 140static const unsigned char init_common[] = {
 141
 142        0x00, MR050,            /* MR0, PAL enabled */
 143        0x01, 0x00,             /* MR1 */
 144        0x02, 0x0c,             /* subc. freq. */
 145        0x03, 0x8c,             /* subc. freq. */
 146        0x04, 0x79,             /* subc. freq. */
 147        0x05, 0x26,             /* subc. freq. */
 148        0x06, 0x40,             /* subc. phase */
 149
 150        0x07, TR0MODE,          /* TR0, 16bit */
 151        0x08, 0x21,             /*  */
 152        0x09, 0x00,             /*  */
 153        0x0a, 0x00,             /*  */
 154        0x0b, 0x00,             /*  */
 155        0x0c, TR1CAPT,          /* TR1 */
 156        0x0d, 0x4f,             /* MR2 */
 157        0x0e, 0x00,             /*  */
 158        0x0f, 0x00,             /*  */
 159        0x10, 0x00,             /*  */
 160        0x11, 0x00,             /*  */
 161};
 162
 163static const unsigned char init_pal[] = {
 164        0x00, MR050,            /* MR0, PAL enabled */
 165        0x01, 0x00,             /* MR1 */
 166        0x02, 0x0c,             /* subc. freq. */
 167        0x03, 0x8c,             /* subc. freq. */
 168        0x04, 0x79,             /* subc. freq. */
 169        0x05, 0x26,             /* subc. freq. */
 170        0x06, 0x40,             /* subc. phase */
 171};
 172
 173static const unsigned char init_ntsc[] = {
 174        0x00, MR060,            /* MR0, NTSC enabled */
 175        0x01, 0x00,             /* MR1 */
 176        0x02, 0x55,             /* subc. freq. */
 177        0x03, 0x55,             /* subc. freq. */
 178        0x04, 0x55,             /* subc. freq. */
 179        0x05, 0x25,             /* subc. freq. */
 180        0x06, 0x1a,             /* subc. phase */
 181};
 182
 183static int adv7175_init(struct v4l2_subdev *sd, u32 val)
 184{
 185        /* This is just for testing!!! */
 186        adv7175_write_block(sd, init_common, sizeof(init_common));
 187        adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 188        adv7175_write(sd, 0x07, TR0MODE);
 189        return 0;
 190}
 191
 192static int adv7175_s_std_output(struct v4l2_subdev *sd, v4l2_std_id std)
 193{
 194        struct adv7175 *encoder = to_adv7175(sd);
 195
 196        if (std & V4L2_STD_NTSC) {
 197                adv7175_write_block(sd, init_ntsc, sizeof(init_ntsc));
 198                if (encoder->input == 0)
 199                        adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 200                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 201                adv7175_write(sd, 0x07, TR0MODE);
 202        } else if (std & V4L2_STD_PAL) {
 203                adv7175_write_block(sd, init_pal, sizeof(init_pal));
 204                if (encoder->input == 0)
 205                        adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 206                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 207                adv7175_write(sd, 0x07, TR0MODE);
 208        } else if (std & V4L2_STD_SECAM) {
 209                /* This is an attempt to convert
 210                 * SECAM->PAL (typically it does not work
 211                 * due to genlock: when decoder is in SECAM
 212                 * and encoder in in PAL the subcarrier can
 213                 * not be synchronized with horizontal
 214                 * quency) */
 215                adv7175_write_block(sd, init_pal, sizeof(init_pal));
 216                if (encoder->input == 0)
 217                        adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 218                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 219                adv7175_write(sd, 0x07, TR0MODE);
 220        } else {
 221                v4l2_dbg(1, debug, sd, "illegal norm: %llx\n",
 222                                (unsigned long long)std);
 223                return -EINVAL;
 224        }
 225        v4l2_dbg(1, debug, sd, "switched to %llx\n", (unsigned long long)std);
 226        encoder->norm = std;
 227        return 0;
 228}
 229
 230static int adv7175_s_routing(struct v4l2_subdev *sd,
 231                             u32 input, u32 output, u32 config)
 232{
 233        struct adv7175 *encoder = to_adv7175(sd);
 234
 235        /* RJ: input = 0: input is from decoder
 236           input = 1: input is from ZR36060
 237           input = 2: color bar */
 238
 239        switch (input) {
 240        case 0:
 241                adv7175_write(sd, 0x01, 0x00);
 242
 243                if (encoder->norm & V4L2_STD_NTSC)
 244                        set_subcarrier_freq(sd, 1);
 245
 246                adv7175_write(sd, 0x0c, TR1CAPT);       /* TR1 */
 247                if (encoder->norm & V4L2_STD_SECAM)
 248                        adv7175_write(sd, 0x0d, 0x49);  /* Disable genlock */
 249                else
 250                        adv7175_write(sd, 0x0d, 0x4f);  /* Enable genlock */
 251                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 252                adv7175_write(sd, 0x07, TR0MODE);
 253                /*udelay(10);*/
 254                break;
 255
 256        case 1:
 257                adv7175_write(sd, 0x01, 0x00);
 258
 259                if (encoder->norm & V4L2_STD_NTSC)
 260                        set_subcarrier_freq(sd, 0);
 261
 262                adv7175_write(sd, 0x0c, TR1PLAY);       /* TR1 */
 263                adv7175_write(sd, 0x0d, 0x49);
 264                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 265                adv7175_write(sd, 0x07, TR0MODE);
 266                /* udelay(10); */
 267                break;
 268
 269        case 2:
 270                adv7175_write(sd, 0x01, 0x80);
 271
 272                if (encoder->norm & V4L2_STD_NTSC)
 273                        set_subcarrier_freq(sd, 0);
 274
 275                adv7175_write(sd, 0x0d, 0x49);
 276                adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 277                adv7175_write(sd, 0x07, TR0MODE);
 278                /* udelay(10); */
 279                break;
 280
 281        default:
 282                v4l2_dbg(1, debug, sd, "illegal input: %d\n", input);
 283                return -EINVAL;
 284        }
 285        v4l2_dbg(1, debug, sd, "switched to %s\n", inputs[input]);
 286        encoder->input = input;
 287        return 0;
 288}
 289
 290static int adv7175_enum_mbus_code(struct v4l2_subdev *sd,
 291                struct v4l2_subdev_state *sd_state,
 292                struct v4l2_subdev_mbus_code_enum *code)
 293{
 294        if (code->pad || code->index >= ARRAY_SIZE(adv7175_codes))
 295                return -EINVAL;
 296
 297        code->code = adv7175_codes[code->index];
 298        return 0;
 299}
 300
 301static int adv7175_get_fmt(struct v4l2_subdev *sd,
 302                struct v4l2_subdev_state *sd_state,
 303                struct v4l2_subdev_format *format)
 304{
 305        struct v4l2_mbus_framefmt *mf = &format->format;
 306        u8 val = adv7175_read(sd, 0x7);
 307
 308        if (format->pad)
 309                return -EINVAL;
 310
 311        if ((val & 0x40) == (1 << 6))
 312                mf->code = MEDIA_BUS_FMT_UYVY8_1X16;
 313        else
 314                mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
 315
 316        mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
 317        mf->width       = 0;
 318        mf->height      = 0;
 319        mf->field       = V4L2_FIELD_ANY;
 320
 321        return 0;
 322}
 323
 324static int adv7175_set_fmt(struct v4l2_subdev *sd,
 325                struct v4l2_subdev_state *sd_state,
 326                struct v4l2_subdev_format *format)
 327{
 328        struct v4l2_mbus_framefmt *mf = &format->format;
 329        u8 val = adv7175_read(sd, 0x7);
 330        int ret = 0;
 331
 332        if (format->pad)
 333                return -EINVAL;
 334
 335        switch (mf->code) {
 336        case MEDIA_BUS_FMT_UYVY8_2X8:
 337                val &= ~0x40;
 338                break;
 339
 340        case MEDIA_BUS_FMT_UYVY8_1X16:
 341                val |= 0x40;
 342                break;
 343
 344        default:
 345                v4l2_dbg(1, debug, sd,
 346                        "illegal v4l2_mbus_framefmt code: %d\n", mf->code);
 347                return -EINVAL;
 348        }
 349
 350        if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
 351                ret = adv7175_write(sd, 0x7, val);
 352
 353        return ret;
 354}
 355
 356static int adv7175_s_power(struct v4l2_subdev *sd, int on)
 357{
 358        if (on)
 359                adv7175_write(sd, 0x01, 0x00);
 360        else
 361                adv7175_write(sd, 0x01, 0x78);
 362
 363        return 0;
 364}
 365
 366/* ----------------------------------------------------------------------- */
 367
 368static const struct v4l2_subdev_core_ops adv7175_core_ops = {
 369        .init = adv7175_init,
 370        .s_power = adv7175_s_power,
 371};
 372
 373static const struct v4l2_subdev_video_ops adv7175_video_ops = {
 374        .s_std_output = adv7175_s_std_output,
 375        .s_routing = adv7175_s_routing,
 376};
 377
 378static const struct v4l2_subdev_pad_ops adv7175_pad_ops = {
 379        .enum_mbus_code = adv7175_enum_mbus_code,
 380        .get_fmt = adv7175_get_fmt,
 381        .set_fmt = adv7175_set_fmt,
 382};
 383
 384static const struct v4l2_subdev_ops adv7175_ops = {
 385        .core = &adv7175_core_ops,
 386        .video = &adv7175_video_ops,
 387        .pad = &adv7175_pad_ops,
 388};
 389
 390/* ----------------------------------------------------------------------- */
 391
 392static int adv7175_probe(struct i2c_client *client,
 393                        const struct i2c_device_id *id)
 394{
 395        int i;
 396        struct adv7175 *encoder;
 397        struct v4l2_subdev *sd;
 398
 399        /* Check if the adapter supports the needed features */
 400        if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
 401                return -ENODEV;
 402
 403        v4l_info(client, "chip found @ 0x%x (%s)\n",
 404                        client->addr << 1, client->adapter->name);
 405
 406        encoder = devm_kzalloc(&client->dev, sizeof(*encoder), GFP_KERNEL);
 407        if (encoder == NULL)
 408                return -ENOMEM;
 409        sd = &encoder->sd;
 410        v4l2_i2c_subdev_init(sd, client, &adv7175_ops);
 411        encoder->norm = V4L2_STD_NTSC;
 412        encoder->input = 0;
 413
 414        i = adv7175_write_block(sd, init_common, sizeof(init_common));
 415        if (i >= 0) {
 416                i = adv7175_write(sd, 0x07, TR0MODE | TR0RST);
 417                i = adv7175_write(sd, 0x07, TR0MODE);
 418                i = adv7175_read(sd, 0x12);
 419                v4l2_dbg(1, debug, sd, "revision %d\n", i & 1);
 420        }
 421        if (i < 0)
 422                v4l2_dbg(1, debug, sd, "init error 0x%x\n", i);
 423        return 0;
 424}
 425
 426static int adv7175_remove(struct i2c_client *client)
 427{
 428        struct v4l2_subdev *sd = i2c_get_clientdata(client);
 429
 430        v4l2_device_unregister_subdev(sd);
 431        return 0;
 432}
 433
 434/* ----------------------------------------------------------------------- */
 435
 436static const struct i2c_device_id adv7175_id[] = {
 437        { "adv7175", 0 },
 438        { "adv7176", 0 },
 439        { }
 440};
 441MODULE_DEVICE_TABLE(i2c, adv7175_id);
 442
 443static struct i2c_driver adv7175_driver = {
 444        .driver = {
 445                .name   = "adv7175",
 446        },
 447        .probe          = adv7175_probe,
 448        .remove         = adv7175_remove,
 449        .id_table       = adv7175_id,
 450};
 451
 452module_i2c_driver(adv7175_driver);
 453