release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/staging/go7007/s2250-board.c

   1 /*
   2  * Copyright (C) 2008 Sensoray Company Inc.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License (Version 2) as
   6  * published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software Foundation,
  15  * Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307, USA.
  16  */
  17
  18 #include <linux/module.h>
  19 #include <linux/init.h>
  20 #include <linux/usb.h>
  21 #include <linux/i2c.h>
  22 #include <linux/videodev2.h>
  23 #include <linux/slab.h>
  24 #include <media/v4l2-device.h>
  25 #include <media/v4l2-common.h>
  26 #include <media/v4l2-i2c-drv.h>
  27 #include <media/v4l2-subdev.h>
  28 #include "go7007-priv.h"
  29
  30 MODULE_DESCRIPTION("Sensoray 2250/2251 i2c v4l2 subdev driver");
  31 MODULE_LICENSE("GPL v2");
  32
  33 #define TLV320_ADDRESS      0x34
  34 #define VPX322_ADDR_ANALOGCONTROL1      0x02
  35 #define VPX322_ADDR_BRIGHTNESS0         0x0127
  36 #define VPX322_ADDR_BRIGHTNESS1         0x0131
  37 #define VPX322_ADDR_CONTRAST0           0x0128
  38 #define VPX322_ADDR_CONTRAST1           0x0132
  39 #define VPX322_ADDR_HUE                 0x00dc
  40 #define VPX322_ADDR_SAT                 0x0030
  41
  42 struct go7007_usb_board {
  43         unsigned int flags;
  44         struct go7007_board_info main_info;
  45 };
  46
  47 struct go7007_usb {
  48         struct go7007_usb_board *board;
  49         struct mutex i2c_lock;
  50         struct usb_device *usbdev;
  51         struct urb *video_urbs[8];
  52         struct urb *audio_urbs[8];
  53         struct urb *intr_urb;
  54 };
  55
  56 static unsigned char aud_regs[] = {
  57         0x1e, 0x00,
  58         0x00, 0x17,
  59         0x02, 0x17,
  60         0x04, 0xf9,
  61         0x06, 0xf9,
  62         0x08, 0x02,
  63         0x0a, 0x00,
  64         0x0c, 0x00,
  65         0x0a, 0x00,
  66         0x0c, 0x00,
  67         0x0e, 0x02,
  68         0x10, 0x00,
  69         0x12, 0x01,
  70         0x00, 0x00,
  71 };
  72
  73
  74 static unsigned char vid_regs[] = {
  75         0xF2, 0x0f,
  76         0xAA, 0x00,
  77         0xF8, 0xff,
  78         0x00, 0x00,
  79 };
  80
  81 static u16 vid_regs_fp[] = {
  82         0x028, 0x067,
  83         0x120, 0x016,
  84         0x121, 0xcF2,
  85         0x122, 0x0F2,
  86         0x123, 0x00c,
  87         0x124, 0x2d0,
  88         0x125, 0x2e0,
  89         0x126, 0x004,
  90         0x128, 0x1E0,
  91         0x12A, 0x016,
  92         0x12B, 0x0F2,
  93         0x12C, 0x0F2,
  94         0x12D, 0x00c,
  95         0x12E, 0x2d0,
  96         0x12F, 0x2e0,
  97         0x130, 0x004,
  98         0x132, 0x1E0,
  99         0x140, 0x060,
 100         0x153, 0x00C,
 101         0x154, 0x200,
 102         0x150, 0x801,
 103         0x000, 0x000
 104 };
 105
 106 /* PAL specific values */
 107 static u16 vid_regs_fp_pal[] =
 108 {
 109         0x120, 0x017,
 110         0x121, 0xd22,
 111         0x122, 0x122,
 112         0x12A, 0x017,
 113         0x12B, 0x122,
 114         0x12C, 0x122,
 115         0x140, 0x060,
 116         0x000, 0x000,
 117 };
 118
 119 struct s2250 {
 120         struct v4l2_subdev sd;
 121         v4l2_std_id std;
 122         int input;
 123         int brightness;
 124         int contrast;
 125         int saturation;
 126         int hue;
 127         int reg12b_val;
 128         int audio_input;
 129         struct i2c_client *audio;
 130 };
 131
 132 static inline struct s2250 *to_state(struct v4l2_subdev *sd)
 133 {
 134         return container_of(sd, struct s2250, sd);
 135 }
 136
 137 /* from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/
 138 static int go7007_usb_vendor_request(struct go7007 *go, u16 request,
 139         u16 value, u16 index, void *transfer_buffer, int length, int in)
 140 {
 141         struct go7007_usb *usb = go->hpi_context;
 142         int timeout = 5000;
 143
 144         if (in) {
 145                 return usb_control_msg(usb->usbdev,
 146                                 usb_rcvctrlpipe(usb->usbdev, 0), request,
 147                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 148                                 value, index, transfer_buffer, length, timeout);
 149         } else {
 150                 return usb_control_msg(usb->usbdev,
 151                                 usb_sndctrlpipe(usb->usbdev, 0), request,
 152                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 153                                 value, index, transfer_buffer, length, timeout);
 154         }
 155 }
 156 /* end from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/
 157
 158 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
 159 {
 160         struct go7007 *go = i2c_get_adapdata(client->adapter);
 161         struct go7007_usb *usb;
 162         int rc;
 163         int dev_addr = client->addr << 1;  /* firmware wants 8-bit address */
 164         u8 *buf;
 165
 166         if (go == NULL)
 167                 return -ENODEV;
 168
 169         if (go->status == STATUS_SHUTDOWN)
 170                 return -EBUSY;
 171
 172         buf = kzalloc(16, GFP_KERNEL);
 173         if (buf == NULL)
 174                 return -ENOMEM;
 175
 176         usb = go->hpi_context;
 177         if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 178                 printk(KERN_INFO "i2c lock failed\n");
 179                 kfree(buf);
 180                 return -EINTR;
 181         }
 182         rc = go7007_usb_vendor_request(go, 0x55, dev_addr,
 183                                        (reg<<8 | value),
 184                                        buf,
 185                                        16, 1);
 186
 187         mutex_unlock(&usb->i2c_lock);
 188         kfree(buf);
 189         return rc;
 190 }
 191
 192 static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
 193 {
 194         struct go7007 *go = i2c_get_adapdata(client->adapter);
 195         struct go7007_usb *usb;
 196         u8 *buf;
 197         struct s2250 *dec = i2c_get_clientdata(client);
 198
 199         if (go == NULL)
 200                 return -ENODEV;
 201
 202         if (go->status == STATUS_SHUTDOWN)
 203                 return -EBUSY;
 204
 205         buf = kzalloc(16, GFP_KERNEL);
 206
 207         if (buf == NULL)
 208                 return -ENOMEM;
 209
 210
 211
 212         memset(buf, 0xcd, 6);
 213
 214         usb = go->hpi_context;
 215         if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 216                 printk(KERN_INFO "i2c lock failed\n");
 217                 kfree(buf);
 218                 return -EINTR;
 219         }
 220         if (go7007_usb_vendor_request(go, 0x57, addr, val, buf, 16, 1) < 0) {
 221                 kfree(buf);
 222                 return -EFAULT;
 223         }
 224
 225         mutex_unlock(&usb->i2c_lock);
 226         if (buf[0] == 0) {
 227                 unsigned int subaddr, val_read;
 228
 229                 subaddr = (buf[4] << 8) + buf[5];
 230                 val_read = (buf[2] << 8) + buf[3];
 231                 kfree(buf);
 232                 if (val_read != val) {
 233                         printk(KERN_INFO "invalid fp write %x %x\n",
 234                                val_read, val);
 235                         return -EFAULT;
 236                 }
 237                 if (subaddr != addr) {
 238                         printk(KERN_INFO "invalid fp write addr %x %x\n",
 239                                subaddr, addr);
 240                         return -EFAULT;
 241                 }
 242         } else {
 243                 kfree(buf);
 244                 return -EFAULT;
 245         }
 246
 247         /* save last 12b value */
 248         if (addr == 0x12b)
 249                 dec->reg12b_val = val;
 250
 251         return 0;
 252 }
 253
 254 static int read_reg_fp(struct i2c_client *client, u16 addr, u16 *val)
 255 {
 256         struct go7007 *go = i2c_get_adapdata(client->adapter);
 257         struct go7007_usb *usb;
 258         u8 *buf;
 259
 260         if (go == NULL)
 261                 return -ENODEV;
 262
 263         if (go->status == STATUS_SHUTDOWN)
 264                 return -EBUSY;
 265
 266         buf = kzalloc(16, GFP_KERNEL);
 267
 268         if (buf == NULL)
 269                 return -ENOMEM;
 270
 271
 272
 273         memset(buf, 0xcd, 6);
 274         usb = go->hpi_context;
 275         if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 276                 printk(KERN_INFO "i2c lock failed\n");
 277                 kfree(buf);
 278                 return -EINTR;
 279         }
 280         if (go7007_usb_vendor_request(go, 0x58, addr, 0, buf, 16, 1) < 0) {
 281                 kfree(buf);
 282                 return -EFAULT;
 283         }
 284         mutex_unlock(&usb->i2c_lock);
 285
 286         *val = (buf[0] << 8) | buf[1];
 287         kfree(buf);
 288
 289         return 0;
 290 }
 291
 292
 293 static int write_regs(struct i2c_client *client, u8 *regs)
 294 {
 295         int i;
 296
 297         for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
 298                 if (write_reg(client, regs[i], regs[i+1]) < 0) {
 299                         printk(KERN_INFO "s2250: failed\n");
 300                         return -1;
 301                 }
 302         }
 303         return 0;
 304 }
 305
 306 static int write_regs_fp(struct i2c_client *client, u16 *regs)
 307 {
 308         int i;
 309
 310         for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
 311                 if (write_reg_fp(client, regs[i], regs[i+1]) < 0) {
 312                         printk(KERN_INFO "s2250: failed fp\n");
 313                         return -1;
 314                 }
 315         }
 316         return 0;
 317 }
 318
 319
 320 /* ------------------------------------------------------------------------- */
 321
 322 static int s2250_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 323                                  u32 config)
 324 {
 325         struct s2250 *state = to_state(sd);
 326         struct i2c_client *client = v4l2_get_subdevdata(sd);
 327         int vidsys;
 328
 329         vidsys = (state->std == V4L2_STD_NTSC) ? 0x01 : 0x00;
 330         if (input == 0) {
 331                 /* composite */
 332                 write_reg_fp(client, 0x20, 0x020 | vidsys);
 333                 write_reg_fp(client, 0x21, 0x662);
 334                 write_reg_fp(client, 0x140, 0x060);
 335         } else if (input == 1) {
 336                 /* S-Video */
 337                 write_reg_fp(client, 0x20, 0x040 | vidsys);
 338                 write_reg_fp(client, 0x21, 0x666);
 339                 write_reg_fp(client, 0x140, 0x060);
 340         } else {
 341                 return -EINVAL;
 342         }
 343         state->input = input;
 344         return 0;
 345 }
 346
 347 static int s2250_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 348 {
 349         struct s2250 *state = to_state(sd);
 350         struct i2c_client *client = v4l2_get_subdevdata(sd);
 351         u16 vidsource;
 352
 353         vidsource = (state->input == 1) ? 0x040 : 0x020;
 354         switch (norm) {
 355         case V4L2_STD_NTSC:
 356                 write_regs_fp(client, vid_regs_fp);
 357                 write_reg_fp(client, 0x20, vidsource | 1);
 358                 break;
 359         case V4L2_STD_PAL:
 360                 write_regs_fp(client, vid_regs_fp);
 361                 write_regs_fp(client, vid_regs_fp_pal);
 362                 write_reg_fp(client, 0x20, vidsource);
 363                 break;
 364         default:
 365                 return -EINVAL;
 366         }
 367         state->std = norm;
 368         return 0;
 369 }
 370
 371 static int s2250_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *query)
 372 {
 373         switch (query->id) {
 374         case V4L2_CID_BRIGHTNESS:
 375                 return v4l2_ctrl_query_fill(query, 0, 100, 1, 50);
 376         case V4L2_CID_CONTRAST:
 377                 return v4l2_ctrl_query_fill(query, 0, 100, 1, 50);
 378         case V4L2_CID_SATURATION:
 379                 return v4l2_ctrl_query_fill(query, 0, 100, 1, 50);
 380         case V4L2_CID_HUE:
 381                 return v4l2_ctrl_query_fill(query, -50, 50, 1, 0);
 382         default:
 383                 return -EINVAL;
 384         }
 385         return 0;
 386 }
 387
 388 static int s2250_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 389 {
 390         struct s2250 *state = to_state(sd);
 391         struct i2c_client *client = v4l2_get_subdevdata(sd);
 392         int value1;
 393         u16 oldvalue;
 394
 395         switch (ctrl->id) {
 396         case V4L2_CID_BRIGHTNESS:
 397                 if (ctrl->value > 100)
 398                         state->brightness = 100;
 399                 else if (ctrl->value < 0)
 400                         state->brightness = 0;
 401                 else
 402                         state->brightness = ctrl->value;
 403                 value1 = (state->brightness - 50) * 255 / 100;
 404                 read_reg_fp(client, VPX322_ADDR_BRIGHTNESS0, &oldvalue);
 405                 write_reg_fp(client, VPX322_ADDR_BRIGHTNESS0,
 406                              value1 | (oldvalue & ~0xff));
 407                 read_reg_fp(client, VPX322_ADDR_BRIGHTNESS1, &oldvalue);
 408                 write_reg_fp(client, VPX322_ADDR_BRIGHTNESS1,
 409                              value1 | (oldvalue & ~0xff));
 410                 write_reg_fp(client, 0x140, 0x60);
 411                 break;
 412         case V4L2_CID_CONTRAST:
 413                 if (ctrl->value > 100)
 414                         state->contrast = 100;
 415                 else if (ctrl->value < 0)
 416                         state->contrast = 0;
 417                 else
 418                         state->contrast = ctrl->value;
 419                 value1 = state->contrast * 0x40 / 100;
 420                 if (value1 > 0x3f)
 421                         value1 = 0x3f; /* max */
 422                 read_reg_fp(client, VPX322_ADDR_CONTRAST0, &oldvalue);
 423                 write_reg_fp(client, VPX322_ADDR_CONTRAST0,
 424                              value1 | (oldvalue & ~0x3f));
 425                 read_reg_fp(client, VPX322_ADDR_CONTRAST1, &oldvalue);
 426                 write_reg_fp(client, VPX322_ADDR_CONTRAST1,
 427                              value1 | (oldvalue & ~0x3f));
 428                 write_reg_fp(client, 0x140, 0x60);
 429                 break;
 430         case V4L2_CID_SATURATION:
 431                 if (ctrl->value > 100)
 432                         state->saturation = 100;
 433                 else if (ctrl->value < 0)
 434                         state->saturation = 0;
 435                 else
 436                         state->saturation = ctrl->value;
 437                 value1 = state->saturation * 4140 / 100;
 438                 if (value1 > 4094)
 439                         value1 = 4094;
 440                 write_reg_fp(client, VPX322_ADDR_SAT, value1);
 441                 break;
 442         case V4L2_CID_HUE:
 443                 if (ctrl->value > 50)
 444                         state->hue = 50;
 445                 else if (ctrl->value < -50)
 446                         state->hue = -50;
 447                 else
 448                         state->hue = ctrl->value;
 449                 /* clamp the hue range */
 450                 value1 = state->hue * 280 / 50;
 451                 write_reg_fp(client, VPX322_ADDR_HUE, value1);
 452                 break;
 453         default:
 454                 return -EINVAL;
 455         }
 456         return 0;
 457 }
 458
 459 static int s2250_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 460 {
 461         struct s2250 *state = to_state(sd);
 462
 463         switch (ctrl->id) {
 464         case V4L2_CID_BRIGHTNESS:
 465                 ctrl->value = state->brightness;
 466                 break;
 467         case V4L2_CID_CONTRAST:
 468                 ctrl->value = state->contrast;
 469                 break;
 470         case V4L2_CID_SATURATION:
 471                 ctrl->value = state->saturation;
 472                 break;
 473         case V4L2_CID_HUE:
 474                 ctrl->value = state->hue;
 475                 break;
 476         default:
 477                 return -EINVAL;
 478         }
 479         return 0;
 480 }
 481
 482 static int s2250_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *fmt)
 483 {
 484         struct s2250 *state = to_state(sd);
 485         struct i2c_client *client = v4l2_get_subdevdata(sd);
 486
 487         if (fmt->fmt.pix.height < 640) {
 488                 write_reg_fp(client, 0x12b, state->reg12b_val | 0x400);
 489                 write_reg_fp(client, 0x140, 0x060);
 490         } else {
 491                 write_reg_fp(client, 0x12b, state->reg12b_val & ~0x400);
 492                 write_reg_fp(client, 0x140, 0x060);
 493         }
 494         return 0;
 495 }
 496
 497 static int s2250_s_audio_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 498                                  u32 config)
 499 {
 500         struct s2250 *state = to_state(sd);
 501
 502         switch (input) {
 503         case 0:
 504                 write_reg(state->audio, 0x08, 0x02); /* Line In */
 505                 break;
 506         case 1:
 507                 write_reg(state->audio, 0x08, 0x04); /* Mic */
 508                 break;
 509         case 2:
 510                 write_reg(state->audio, 0x08, 0x05); /* Mic Boost */
 511                 break;
 512         default:
 513                 return -EINVAL;
 514         }
 515         state->audio_input = input;
 516         return 0;
 517 }
 518
 519
 520 static int s2250_log_status(struct v4l2_subdev *sd)
 521 {
 522         struct s2250 *state = to_state(sd);
 523
 524         v4l2_info(sd, "Standard: %s\n", state->std == V4L2_STD_NTSC ? "NTSC" :
 525                                         state->std == V4L2_STD_PAL ? "PAL" :
 526                                         state->std == V4L2_STD_SECAM ? "SECAM" :
 527                                         "unknown");
 528         v4l2_info(sd, "Input: %s\n", state->input == 0 ? "Composite" :
 529                                         state->input == 1 ? "S-video" :
 530                                         "error");
 531         v4l2_info(sd, "Brightness: %d\n", state->brightness);
 532         v4l2_info(sd, "Contrast: %d\n", state->contrast);
 533         v4l2_info(sd, "Saturation: %d\n", state->saturation);
 534         v4l2_info(sd, "Hue: %d\n", state->hue); return 0;
 535         v4l2_info(sd, "Audio input: %s\n", state->audio_input == 0 ? "Line In" :
 536                                         state->audio_input == 1 ? "Mic" :
 537                                         state->audio_input == 2 ? "Mic Boost" :
 538                                         "error");
 539         return 0;
 540 }
 541
 542 /* --------------------------------------------------------------------------*/
 543
 544 static const struct v4l2_subdev_core_ops s2250_core_ops = {
 545         .log_status = s2250_log_status,
 546         .g_ctrl = s2250_g_ctrl,
 547         .s_ctrl = s2250_s_ctrl,
 548         .queryctrl = s2250_queryctrl,
 549         .s_std = s2250_s_std,
 550 };
 551
 552 static const struct v4l2_subdev_audio_ops s2250_audio_ops = {
 553         .s_routing = s2250_s_audio_routing,
 554 };
 555
 556 static const struct v4l2_subdev_video_ops s2250_video_ops = {
 557         .s_routing = s2250_s_video_routing,
 558         .s_fmt = s2250_s_fmt,
 559 };
 560
 561 static const struct v4l2_subdev_ops s2250_ops = {
 562         .core = &s2250_core_ops,
 563         .audio = &s2250_audio_ops,
 564         .video = &s2250_video_ops,
 565 };
 566
 567 /* --------------------------------------------------------------------------*/
 568
 569 static int s2250_probe(struct i2c_client *client,
 570                        const struct i2c_device_id *id)
 571 {
 572         struct i2c_client *audio;
 573         struct i2c_adapter *adapter = client->adapter;
 574         struct s2250 *state;
 575         struct v4l2_subdev *sd;
 576         u8 *data;
 577         struct go7007 *go = i2c_get_adapdata(adapter);
 578         struct go7007_usb *usb = go->hpi_context;
 579
 580         audio = i2c_new_dummy(adapter, TLV320_ADDRESS >> 1);
 581         if (audio == NULL)
 582                 return -ENOMEM;
 583
 584         state = kmalloc(sizeof(struct s2250), GFP_KERNEL);
 585         if (state == NULL) {
 586                 i2c_unregister_device(audio);
 587                 return -ENOMEM;
 588         }
 589
 590         sd = &state->sd;
 591         v4l2_i2c_subdev_init(sd, client, &s2250_ops);
 592
 593         v4l2_info(sd, "initializing %s at address 0x%x on %s\n",
 594                "Sensoray 2250/2251", client->addr, client->adapter->name);
 595
 596         state->std = V4L2_STD_NTSC;
 597         state->brightness = 50;
 598         state->contrast = 50;
 599         state->saturation = 50;
 600         state->hue = 0;
 601         state->audio = audio;
 602
 603         /* initialize the audio */
 604         if (write_regs(audio, aud_regs) < 0) {
 605                 printk(KERN_ERR
 606                        "s2250: error initializing audio\n");
 607                 i2c_unregister_device(audio);
 608                 kfree(state);
 609                 return 0;
 610         }
 611
 612         if (write_regs(client, vid_regs) < 0) {
 613                 printk(KERN_ERR
 614                        "s2250: error initializing decoder\n");
 615                 i2c_unregister_device(audio);
 616                 kfree(state);
 617                 return 0;
 618         }
 619         if (write_regs_fp(client, vid_regs_fp) < 0) {
 620                 printk(KERN_ERR
 621                        "s2250: error initializing decoder\n");
 622                 i2c_unregister_device(audio);
 623                 kfree(state);
 624                 return 0;
 625         }
 626         /* set default channel */
 627         /* composite */
 628         write_reg_fp(client, 0x20, 0x020 | 1);
 629         write_reg_fp(client, 0x21, 0x662);
 630         write_reg_fp(client, 0x140, 0x060);
 631
 632         /* set default audio input */
 633         state->audio_input = 0;
 634         write_reg(client, 0x08, 0x02); /* Line In */
 635
 636         if (mutex_lock_interruptible(&usb->i2c_lock) == 0) {
 637                 data = kzalloc(16, GFP_KERNEL);
 638                 if (data != NULL) {
 639                         int rc;
 640                         rc = go7007_usb_vendor_request(go, 0x41, 0, 0,
 641                                                        data, 16, 1);
 642                         if (rc > 0) {
 643                                 u8 mask;
 644                                 data[0] = 0;
 645                                 mask = 1<<5;
 646                                 data[0] &= ~mask;
 647                                 data[1] |= mask;
 648                                 go7007_usb_vendor_request(go, 0x40, 0,
 649                                                           (data[1]<<8)
 650                                                           + data[1],
 651                                                           data, 16, 0);
 652                         }
 653                         kfree(data);
 654                 }
 655                 mutex_unlock(&usb->i2c_lock);
 656         }
 657
 658         v4l2_info(sd, "initialized successfully\n");
 659         return 0;
 660 }
 661
 662 static int s2250_remove(struct i2c_client *client)
 663 {
 664         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 665
 666         v4l2_device_unregister_subdev(sd);
 667         kfree(to_state(sd));
 668         return 0;
 669 }
 670
 671 static const struct i2c_device_id s2250_id[] = {
 672         { "s2250", 0 },
 673         { }
 674 };
 675 MODULE_DEVICE_TABLE(i2c, s2250_id);
 676
 677 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
 678         .name = "s2250",
 679         .probe = s2250_probe,
 680         .remove = s2250_remove,
 681         .id_table = s2250_id,
 682 };