Pileus Git - ~andy/linux/blob - drivers/staging/media/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-subdev.h>
  27 #include "go7007-priv.h"
  28
  29 MODULE_DESCRIPTION("Sensoray 2250/2251 i2c v4l2 subdev driver");
  30 MODULE_LICENSE("GPL v2");
  31
  32 #define TLV320_ADDRESS      0x34
  33 #define VPX322_ADDR_ANALOGCONTROL1      0x02
  34 #define VPX322_ADDR_BRIGHTNESS0         0x0127
  35 #define VPX322_ADDR_BRIGHTNESS1         0x0131
  36 #define VPX322_ADDR_CONTRAST0           0x0128
  37 #define VPX322_ADDR_CONTRAST1           0x0132
  38 #define VPX322_ADDR_HUE                 0x00dc
  39 #define VPX322_ADDR_SAT                 0x0030
  40
  41 struct go7007_usb_board {
  42         unsigned int flags;
  43         struct go7007_board_info main_info;
  44 };
  45
  46 struct go7007_usb {
  47         struct go7007_usb_board *board;
  48         struct mutex i2c_lock;
  49         struct usb_device *usbdev;
  50         struct urb *video_urbs[8];
  51         struct urb *audio_urbs[8];
  52         struct urb *intr_urb;
  53 };
  54
  55 static unsigned char aud_regs[] = {
  56         0x1e, 0x00,
  57         0x00, 0x17,
  58         0x02, 0x17,
  59         0x04, 0xf9,
  60         0x06, 0xf9,
  61         0x08, 0x02,
  62         0x0a, 0x00,
  63         0x0c, 0x00,
  64         0x0a, 0x00,
  65         0x0c, 0x00,
  66         0x0e, 0x02,
  67         0x10, 0x00,
  68         0x12, 0x01,
  69         0x00, 0x00,
  70 };
  71
  72
  73 static unsigned char vid_regs[] = {
  74         0xF2, 0x0f,
  75         0xAA, 0x00,
  76         0xF8, 0xff,
  77         0x00, 0x00,
  78 };
  79
  80 static u16 vid_regs_fp[] = {
  81         0x028, 0x067,
  82         0x120, 0x016,
  83         0x121, 0xcF2,
  84         0x122, 0x0F2,
  85         0x123, 0x00c,
  86         0x124, 0x2d0,
  87         0x125, 0x2e0,
  88         0x126, 0x004,
  89         0x128, 0x1E0,
  90         0x12A, 0x016,
  91         0x12B, 0x0F2,
  92         0x12C, 0x0F2,
  93         0x12D, 0x00c,
  94         0x12E, 0x2d0,
  95         0x12F, 0x2e0,
  96         0x130, 0x004,
  97         0x132, 0x1E0,
  98         0x140, 0x060,
  99         0x153, 0x00C,
 100         0x154, 0x200,
 101         0x150, 0x801,
 102         0x000, 0x000
 103 };
 104
 105 /* PAL specific values */
 106 static u16 vid_regs_fp_pal[] =
 107 {
 108         0x120, 0x017,
 109         0x121, 0xd22,
 110         0x122, 0x122,
 111         0x12A, 0x017,
 112         0x12B, 0x122,
 113         0x12C, 0x122,
 114         0x140, 0x060,
 115         0x000, 0x000,
 116 };
 117
 118 struct s2250 {
 119         struct v4l2_subdev sd;
 120         v4l2_std_id std;
 121         int input;
 122         int brightness;
 123         int contrast;
 124         int saturation;
 125         int hue;
 126         int reg12b_val;
 127         int audio_input;
 128         struct i2c_client *audio;
 129 };
 130
 131 static inline struct s2250 *to_state(struct v4l2_subdev *sd)
 132 {
 133         return container_of(sd, struct s2250, sd);
 134 }
 135
 136 /* from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/
 137 static int go7007_usb_vendor_request(struct go7007 *go, u16 request,
 138         u16 value, u16 index, void *transfer_buffer, int length, int in)
 139 {
 140         struct go7007_usb *usb = go->hpi_context;
 141         int timeout = 5000;
 142
 143         if (in) {
 144                 return usb_control_msg(usb->usbdev,
 145                                 usb_rcvctrlpipe(usb->usbdev, 0), request,
 146                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE | USB_DIR_IN,
 147                                 value, index, transfer_buffer, length, timeout);
 148         } else {
 149                 return usb_control_msg(usb->usbdev,
 150                                 usb_sndctrlpipe(usb->usbdev, 0), request,
 151                                 USB_TYPE_VENDOR | USB_RECIP_DEVICE,
 152                                 value, index, transfer_buffer, length, timeout);
 153         }
 154 }
 155 /* end from go7007-usb.c which is Copyright (C) 2005-2006 Micronas USA Inc.*/
 156
 157 static int write_reg(struct i2c_client *client, u8 reg, u8 value)
 158 {
 159         struct go7007 *go = i2c_get_adapdata(client->adapter);
 160         struct go7007_usb *usb;
 161         int rc;
 162         int dev_addr = client->addr << 1;  /* firmware wants 8-bit address */
 163         u8 *buf;
 164
 165         if (go == NULL)
 166                 return -ENODEV;
 167
 168         if (go->status == STATUS_SHUTDOWN)
 169                 return -EBUSY;
 170
 171         buf = kzalloc(16, GFP_KERNEL);
 172         if (buf == NULL)
 173                 return -ENOMEM;
 174
 175         usb = go->hpi_context;
 176         if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 177                 printk(KERN_INFO "i2c lock failed\n");
 178                 kfree(buf);
 179                 return -EINTR;
 180         }
 181         rc = go7007_usb_vendor_request(go, 0x55, dev_addr,
 182                                        (reg<<8 | value),
 183                                        buf,
 184                                        16, 1);
 185
 186         mutex_unlock(&usb->i2c_lock);
 187         kfree(buf);
 188         return rc;
 189 }
 190
 191 static int write_reg_fp(struct i2c_client *client, u16 addr, u16 val)
 192 {
 193         struct go7007 *go = i2c_get_adapdata(client->adapter);
 194         struct go7007_usb *usb;
 195         int rc;
 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         rc = go7007_usb_vendor_request(go, 0x57, addr, val, buf, 16, 1);
 221         mutex_unlock(&usb->i2c_lock);
 222         if (rc < 0) {
 223                 kfree(buf);
 224                 return rc;
 225         }
 226
 227         if (buf[0] == 0) {
 228                 unsigned int subaddr, val_read;
 229
 230                 subaddr = (buf[4] << 8) + buf[5];
 231                 val_read = (buf[2] << 8) + buf[3];
 232                 kfree(buf);
 233                 if (val_read != val) {
 234                         printk(KERN_INFO "invalid fp write %x %x\n",
 235                                val_read, val);
 236                         return -EFAULT;
 237                 }
 238                 if (subaddr != addr) {
 239                         printk(KERN_INFO "invalid fp write addr %x %x\n",
 240                                subaddr, addr);
 241                         return -EFAULT;
 242                 }
 243         } else {
 244                 kfree(buf);
 245                 return -EFAULT;
 246         }
 247
 248         /* save last 12b value */
 249         if (addr == 0x12b)
 250                 dec->reg12b_val = val;
 251
 252         return 0;
 253 }
 254
 255 static int read_reg_fp(struct i2c_client *client, u16 addr, u16 *val)
 256 {
 257         struct go7007 *go = i2c_get_adapdata(client->adapter);
 258         struct go7007_usb *usb;
 259         int rc;
 260         u8 *buf;
 261
 262         if (go == NULL)
 263                 return -ENODEV;
 264
 265         if (go->status == STATUS_SHUTDOWN)
 266                 return -EBUSY;
 267
 268         buf = kzalloc(16, GFP_KERNEL);
 269
 270         if (buf == NULL)
 271                 return -ENOMEM;
 272
 273
 274
 275         memset(buf, 0xcd, 6);
 276         usb = go->hpi_context;
 277         if (mutex_lock_interruptible(&usb->i2c_lock) != 0) {
 278                 printk(KERN_INFO "i2c lock failed\n");
 279                 kfree(buf);
 280                 return -EINTR;
 281         }
 282         rc = go7007_usb_vendor_request(go, 0x58, addr, 0, buf, 16, 1);
 283         mutex_unlock(&usb->i2c_lock);
 284         if (rc < 0) {
 285                 kfree(buf);
 286                 return rc;
 287         }
 288
 289         *val = (buf[0] << 8) | buf[1];
 290         kfree(buf);
 291
 292         return 0;
 293 }
 294
 295
 296 static int write_regs(struct i2c_client *client, u8 *regs)
 297 {
 298         int i;
 299
 300         for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
 301                 if (write_reg(client, regs[i], regs[i+1]) < 0) {
 302                         printk(KERN_INFO "s2250: failed\n");
 303                         return -1;
 304                 }
 305         }
 306         return 0;
 307 }
 308
 309 static int write_regs_fp(struct i2c_client *client, u16 *regs)
 310 {
 311         int i;
 312
 313         for (i = 0; !((regs[i] == 0x00) && (regs[i+1] == 0x00)); i += 2) {
 314                 if (write_reg_fp(client, regs[i], regs[i+1]) < 0) {
 315                         printk(KERN_INFO "s2250: failed fp\n");
 316                         return -1;
 317                 }
 318         }
 319         return 0;
 320 }
 321
 322
 323 /* ------------------------------------------------------------------------- */
 324
 325 static int s2250_s_video_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 326                                  u32 config)
 327 {
 328         struct s2250 *state = to_state(sd);
 329         struct i2c_client *client = v4l2_get_subdevdata(sd);
 330         int vidsys;
 331
 332         vidsys = (state->std == V4L2_STD_NTSC) ? 0x01 : 0x00;
 333         if (input == 0) {
 334                 /* composite */
 335                 write_reg_fp(client, 0x20, 0x020 | vidsys);
 336                 write_reg_fp(client, 0x21, 0x662);
 337                 write_reg_fp(client, 0x140, 0x060);
 338         } else if (input == 1) {
 339                 /* S-Video */
 340                 write_reg_fp(client, 0x20, 0x040 | vidsys);
 341                 write_reg_fp(client, 0x21, 0x666);
 342                 write_reg_fp(client, 0x140, 0x060);
 343         } else {
 344                 return -EINVAL;
 345         }
 346         state->input = input;
 347         return 0;
 348 }
 349
 350 static int s2250_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
 351 {
 352         struct s2250 *state = to_state(sd);
 353         struct i2c_client *client = v4l2_get_subdevdata(sd);
 354         u16 vidsource;
 355
 356         vidsource = (state->input == 1) ? 0x040 : 0x020;
 357         switch (norm) {
 358         case V4L2_STD_NTSC:
 359                 write_regs_fp(client, vid_regs_fp);
 360                 write_reg_fp(client, 0x20, vidsource | 1);
 361                 break;
 362         case V4L2_STD_PAL:
 363                 write_regs_fp(client, vid_regs_fp);
 364                 write_regs_fp(client, vid_regs_fp_pal);
 365                 write_reg_fp(client, 0x20, vidsource);
 366                 break;
 367         default:
 368                 return -EINVAL;
 369         }
 370         state->std = norm;
 371         return 0;
 372 }
 373
 374 static int s2250_queryctrl(struct v4l2_subdev *sd, struct v4l2_queryctrl *query)
 375 {
 376         switch (query->id) {
 377         case V4L2_CID_BRIGHTNESS:
 378                 return v4l2_ctrl_query_fill(query, 0, 100, 1, 50);
 379         case V4L2_CID_CONTRAST:
 380                 return v4l2_ctrl_query_fill(query, 0, 100, 1, 50);
 381         case V4L2_CID_SATURATION:
 382                 return v4l2_ctrl_query_fill(query, 0, 100, 1, 50);
 383         case V4L2_CID_HUE:
 384                 return v4l2_ctrl_query_fill(query, -50, 50, 1, 0);
 385         default:
 386                 return -EINVAL;
 387         }
 388         return 0;
 389 }
 390
 391 static int s2250_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 392 {
 393         struct s2250 *state = to_state(sd);
 394         struct i2c_client *client = v4l2_get_subdevdata(sd);
 395         int value1;
 396         u16 oldvalue;
 397
 398         switch (ctrl->id) {
 399         case V4L2_CID_BRIGHTNESS:
 400                 if (ctrl->value > 100)
 401                         state->brightness = 100;
 402                 else if (ctrl->value < 0)
 403                         state->brightness = 0;
 404                 else
 405                         state->brightness = ctrl->value;
 406                 value1 = (state->brightness - 50) * 255 / 100;
 407                 read_reg_fp(client, VPX322_ADDR_BRIGHTNESS0, &oldvalue);
 408                 write_reg_fp(client, VPX322_ADDR_BRIGHTNESS0,
 409                              value1 | (oldvalue & ~0xff));
 410                 read_reg_fp(client, VPX322_ADDR_BRIGHTNESS1, &oldvalue);
 411                 write_reg_fp(client, VPX322_ADDR_BRIGHTNESS1,
 412                              value1 | (oldvalue & ~0xff));
 413                 write_reg_fp(client, 0x140, 0x60);
 414                 break;
 415         case V4L2_CID_CONTRAST:
 416                 if (ctrl->value > 100)
 417                         state->contrast = 100;
 418                 else if (ctrl->value < 0)
 419                         state->contrast = 0;
 420                 else
 421                         state->contrast = ctrl->value;
 422                 value1 = state->contrast * 0x40 / 100;
 423                 if (value1 > 0x3f)
 424                         value1 = 0x3f; /* max */
 425                 read_reg_fp(client, VPX322_ADDR_CONTRAST0, &oldvalue);
 426                 write_reg_fp(client, VPX322_ADDR_CONTRAST0,
 427                              value1 | (oldvalue & ~0x3f));
 428                 read_reg_fp(client, VPX322_ADDR_CONTRAST1, &oldvalue);
 429                 write_reg_fp(client, VPX322_ADDR_CONTRAST1,
 430                              value1 | (oldvalue & ~0x3f));
 431                 write_reg_fp(client, 0x140, 0x60);
 432                 break;
 433         case V4L2_CID_SATURATION:
 434                 if (ctrl->value > 100)
 435                         state->saturation = 100;
 436                 else if (ctrl->value < 0)
 437                         state->saturation = 0;
 438                 else
 439                         state->saturation = ctrl->value;
 440                 value1 = state->saturation * 4140 / 100;
 441                 if (value1 > 4094)
 442                         value1 = 4094;
 443                 write_reg_fp(client, VPX322_ADDR_SAT, value1);
 444                 break;
 445         case V4L2_CID_HUE:
 446                 if (ctrl->value > 50)
 447                         state->hue = 50;
 448                 else if (ctrl->value < -50)
 449                         state->hue = -50;
 450                 else
 451                         state->hue = ctrl->value;
 452                 /* clamp the hue range */
 453                 value1 = state->hue * 280 / 50;
 454                 write_reg_fp(client, VPX322_ADDR_HUE, value1);
 455                 break;
 456         default:
 457                 return -EINVAL;
 458         }
 459         return 0;
 460 }
 461
 462 static int s2250_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
 463 {
 464         struct s2250 *state = to_state(sd);
 465
 466         switch (ctrl->id) {
 467         case V4L2_CID_BRIGHTNESS:
 468                 ctrl->value = state->brightness;
 469                 break;
 470         case V4L2_CID_CONTRAST:
 471                 ctrl->value = state->contrast;
 472                 break;
 473         case V4L2_CID_SATURATION:
 474                 ctrl->value = state->saturation;
 475                 break;
 476         case V4L2_CID_HUE:
 477                 ctrl->value = state->hue;
 478                 break;
 479         default:
 480                 return -EINVAL;
 481         }
 482         return 0;
 483 }
 484
 485 static int s2250_s_mbus_fmt(struct v4l2_subdev *sd,
 486                         struct v4l2_mbus_framefmt *fmt)
 487 {
 488         struct s2250 *state = to_state(sd);
 489         struct i2c_client *client = v4l2_get_subdevdata(sd);
 490
 491         if (fmt->height < 640) {
 492                 write_reg_fp(client, 0x12b, state->reg12b_val | 0x400);
 493                 write_reg_fp(client, 0x140, 0x060);
 494         } else {
 495                 write_reg_fp(client, 0x12b, state->reg12b_val & ~0x400);
 496                 write_reg_fp(client, 0x140, 0x060);
 497         }
 498         return 0;
 499 }
 500
 501 static int s2250_s_audio_routing(struct v4l2_subdev *sd, u32 input, u32 output,
 502                                  u32 config)
 503 {
 504         struct s2250 *state = to_state(sd);
 505
 506         switch (input) {
 507         case 0:
 508                 write_reg(state->audio, 0x08, 0x02); /* Line In */
 509                 break;
 510         case 1:
 511                 write_reg(state->audio, 0x08, 0x04); /* Mic */
 512                 break;
 513         case 2:
 514                 write_reg(state->audio, 0x08, 0x05); /* Mic Boost */
 515                 break;
 516         default:
 517                 return -EINVAL;
 518         }
 519         state->audio_input = input;
 520         return 0;
 521 }
 522
 523
 524 static int s2250_log_status(struct v4l2_subdev *sd)
 525 {
 526         struct s2250 *state = to_state(sd);
 527
 528         v4l2_info(sd, "Standard: %s\n", state->std == V4L2_STD_NTSC ? "NTSC" :
 529                                         state->std == V4L2_STD_PAL ? "PAL" :
 530                                         state->std == V4L2_STD_SECAM ? "SECAM" :
 531                                         "unknown");
 532         v4l2_info(sd, "Input: %s\n", state->input == 0 ? "Composite" :
 533                                         state->input == 1 ? "S-video" :
 534                                         "error");
 535         v4l2_info(sd, "Brightness: %d\n", state->brightness);
 536         v4l2_info(sd, "Contrast: %d\n", state->contrast);
 537         v4l2_info(sd, "Saturation: %d\n", state->saturation);
 538         v4l2_info(sd, "Hue: %d\n", state->hue); return 0;
 539         v4l2_info(sd, "Audio input: %s\n", state->audio_input == 0 ? "Line In" :
 540                                         state->audio_input == 1 ? "Mic" :
 541                                         state->audio_input == 2 ? "Mic Boost" :
 542                                         "error");
 543         return 0;
 544 }
 545
 546 /* --------------------------------------------------------------------------*/
 547
 548 static const struct v4l2_subdev_core_ops s2250_core_ops = {
 549         .log_status = s2250_log_status,
 550         .g_ctrl = s2250_g_ctrl,
 551         .s_ctrl = s2250_s_ctrl,
 552         .queryctrl = s2250_queryctrl,
 553         .s_std = s2250_s_std,
 554 };
 555
 556 static const struct v4l2_subdev_audio_ops s2250_audio_ops = {
 557         .s_routing = s2250_s_audio_routing,
 558 };
 559
 560 static const struct v4l2_subdev_video_ops s2250_video_ops = {
 561         .s_routing = s2250_s_video_routing,
 562         .s_mbus_fmt = s2250_s_mbus_fmt,
 563 };
 564
 565 static const struct v4l2_subdev_ops s2250_ops = {
 566         .core = &s2250_core_ops,
 567         .audio = &s2250_audio_ops,
 568         .video = &s2250_video_ops,
 569 };
 570
 571 /* --------------------------------------------------------------------------*/
 572
 573 static int s2250_probe(struct i2c_client *client,
 574                        const struct i2c_device_id *id)
 575 {
 576         struct i2c_client *audio;
 577         struct i2c_adapter *adapter = client->adapter;
 578         struct s2250 *state;
 579         struct v4l2_subdev *sd;
 580         u8 *data;
 581         struct go7007 *go = i2c_get_adapdata(adapter);
 582         struct go7007_usb *usb = go->hpi_context;
 583
 584         audio = i2c_new_dummy(adapter, TLV320_ADDRESS >> 1);
 585         if (audio == NULL)
 586                 return -ENOMEM;
 587
 588         state = kmalloc(sizeof(struct s2250), GFP_KERNEL);
 589         if (state == NULL) {
 590                 i2c_unregister_device(audio);
 591                 return -ENOMEM;
 592         }
 593
 594         sd = &state->sd;
 595         v4l2_i2c_subdev_init(sd, client, &s2250_ops);
 596
 597         v4l2_info(sd, "initializing %s at address 0x%x on %s\n",
 598                "Sensoray 2250/2251", client->addr, client->adapter->name);
 599
 600         state->std = V4L2_STD_NTSC;
 601         state->brightness = 50;
 602         state->contrast = 50;
 603         state->saturation = 50;
 604         state->hue = 0;
 605         state->audio = audio;
 606
 607         /* initialize the audio */
 608         if (write_regs(audio, aud_regs) < 0) {
 609                 printk(KERN_ERR
 610                        "s2250: error initializing audio\n");
 611                 i2c_unregister_device(audio);
 612                 kfree(state);
 613                 return 0;
 614         }
 615
 616         if (write_regs(client, vid_regs) < 0) {
 617                 printk(KERN_ERR
 618                        "s2250: error initializing decoder\n");
 619                 i2c_unregister_device(audio);
 620                 kfree(state);
 621                 return 0;
 622         }
 623         if (write_regs_fp(client, vid_regs_fp) < 0) {
 624                 printk(KERN_ERR
 625                        "s2250: error initializing decoder\n");
 626                 i2c_unregister_device(audio);
 627                 kfree(state);
 628                 return 0;
 629         }
 630         /* set default channel */
 631         /* composite */
 632         write_reg_fp(client, 0x20, 0x020 | 1);
 633         write_reg_fp(client, 0x21, 0x662);
 634         write_reg_fp(client, 0x140, 0x060);
 635
 636         /* set default audio input */
 637         state->audio_input = 0;
 638         write_reg(client, 0x08, 0x02); /* Line In */
 639
 640         if (mutex_lock_interruptible(&usb->i2c_lock) == 0) {
 641                 data = kzalloc(16, GFP_KERNEL);
 642                 if (data != NULL) {
 643                         int rc;
 644                         rc = go7007_usb_vendor_request(go, 0x41, 0, 0,
 645                                                        data, 16, 1);
 646                         if (rc > 0) {
 647                                 u8 mask;
 648                                 data[0] = 0;
 649                                 mask = 1<<5;
 650                                 data[0] &= ~mask;
 651                                 data[1] |= mask;
 652                                 go7007_usb_vendor_request(go, 0x40, 0,
 653                                                           (data[1]<<8)
 654                                                           + data[1],
 655                                                           data, 16, 0);
 656                         }
 657                         kfree(data);
 658                 }
 659                 mutex_unlock(&usb->i2c_lock);
 660         }
 661
 662         v4l2_info(sd, "initialized successfully\n");
 663         return 0;
 664 }
 665
 666 static int s2250_remove(struct i2c_client *client)
 667 {
 668         struct v4l2_subdev *sd = i2c_get_clientdata(client);
 669
 670         v4l2_device_unregister_subdev(sd);
 671         kfree(to_state(sd));
 672         return 0;
 673 }
 674
 675 static const struct i2c_device_id s2250_id[] = {
 676         { "s2250", 0 },
 677         { }
 678 };
 679 MODULE_DEVICE_TABLE(i2c, s2250_id);
 680
 681 static struct i2c_driver s2250_driver = {
 682         .driver = {
 683                 .owner  = THIS_MODULE,
 684                 .name   = "s2250",
 685         },
 686         .probe          = s2250_probe,
 687         .remove         = s2250_remove,
 688         .id_table       = s2250_id,
 689 };
 690
 691 static __init int init_s2250(void)
 692 {
 693         return i2c_add_driver(&s2250_driver);
 694 }
 695
 696 static __exit void exit_s2250(void)
 697 {
 698         i2c_del_driver(&s2250_driver);
 699 }
 700
 701 module_init(init_s2250);
 702 module_exit(exit_s2250);