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[media] drivers/media/video: add missing kfree
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / ov772x.c
blob48895ef863ff5da1ccddc3e5bc60f9af8f8f2e7c
1 /*
2 * ov772x Camera Driver
3 *
4 * Copyright (C) 2008 Renesas Solutions Corp.
5 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
6 *
7 * Based on ov7670 and soc_camera_platform driver,
8 *
9 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
10 * Copyright (C) 2008 Magnus Damm
11 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License version 2 as
15 * published by the Free Software Foundation.
16 */
17
18 #include <linux/init.h>
19 #include <linux/module.h>
20 #include <linux/i2c.h>
21 #include <linux/slab.h>
22 #include <linux/delay.h>
23 #include <linux/videodev2.h>
24 #include <media/v4l2-chip-ident.h>
25 #include <media/v4l2-subdev.h>
26 #include <media/soc_camera.h>
27 #include <media/soc_mediabus.h>
28 #include <media/ov772x.h>
29
30 /*
31 * register offset
32 */
33 #define GAIN 0x00 /* AGC - Gain control gain setting */
34 #define BLUE 0x01 /* AWB - Blue channel gain setting */
35 #define RED 0x02 /* AWB - Red channel gain setting */
36 #define GREEN 0x03 /* AWB - Green channel gain setting */
37 #define COM1 0x04 /* Common control 1 */
38 #define BAVG 0x05 /* U/B Average Level */
39 #define GAVG 0x06 /* Y/Gb Average Level */
40 #define RAVG 0x07 /* V/R Average Level */
41 #define AECH 0x08 /* Exposure Value - AEC MSBs */
42 #define COM2 0x09 /* Common control 2 */
43 #define PID 0x0A /* Product ID Number MSB */
44 #define VER 0x0B /* Product ID Number LSB */
45 #define COM3 0x0C /* Common control 3 */
46 #define COM4 0x0D /* Common control 4 */
47 #define COM5 0x0E /* Common control 5 */
48 #define COM6 0x0F /* Common control 6 */
49 #define AEC 0x10 /* Exposure Value */
50 #define CLKRC 0x11 /* Internal clock */
51 #define COM7 0x12 /* Common control 7 */
52 #define COM8 0x13 /* Common control 8 */
53 #define COM9 0x14 /* Common control 9 */
54 #define COM10 0x15 /* Common control 10 */
55 #define REG16 0x16 /* Register 16 */
56 #define HSTART 0x17 /* Horizontal sensor size */
57 #define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
58 #define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
59 #define VSIZE 0x1A /* Vertical sensor size */
60 #define PSHFT 0x1B /* Data format - pixel delay select */
61 #define MIDH 0x1C /* Manufacturer ID byte - high */
62 #define MIDL 0x1D /* Manufacturer ID byte - low */
63 #define LAEC 0x1F /* Fine AEC value */
64 #define COM11 0x20 /* Common control 11 */
65 #define BDBASE 0x22 /* Banding filter Minimum AEC value */
66 #define DBSTEP 0x23 /* Banding filter Maximum Setp */
67 #define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
68 #define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
69 #define VPT 0x26 /* AGC/AEC Fast mode operating region */
70 #define REG28 0x28 /* Register 28 */
71 #define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
72 #define EXHCH 0x2A /* Dummy pixel insert MSB */
73 #define EXHCL 0x2B /* Dummy pixel insert LSB */
74 #define VOUTSIZE 0x2C /* Vertical data output size MSBs */
75 #define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
76 #define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
77 #define YAVE 0x2F /* Y/G Channel Average value */
78 #define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
79 #define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
80 #define HREF 0x32 /* Image start and size control */
81 #define DM_LNL 0x33 /* Dummy line low 8 bits */
82 #define DM_LNH 0x34 /* Dummy line high 8 bits */
83 #define ADOFF_B 0x35 /* AD offset compensation value for B channel */
84 #define ADOFF_R 0x36 /* AD offset compensation value for R channel */
85 #define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
86 #define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
87 #define OFF_B 0x39 /* Analog process B channel offset value */
88 #define OFF_R 0x3A /* Analog process R channel offset value */
89 #define OFF_GB 0x3B /* Analog process Gb channel offset value */
90 #define OFF_GR 0x3C /* Analog process Gr channel offset value */
91 #define COM12 0x3D /* Common control 12 */
92 #define COM13 0x3E /* Common control 13 */
93 #define COM14 0x3F /* Common control 14 */
94 #define COM15 0x40 /* Common control 15*/
95 #define COM16 0x41 /* Common control 16 */
96 #define TGT_B 0x42 /* BLC blue channel target value */
97 #define TGT_R 0x43 /* BLC red channel target value */
98 #define TGT_GB 0x44 /* BLC Gb channel target value */
99 #define TGT_GR 0x45 /* BLC Gr channel target value */
100 /* for ov7720 */
101 #define LCC0 0x46 /* Lens correction control 0 */
102 #define LCC1 0x47 /* Lens correction option 1 - X coordinate */
103 #define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
104 #define LCC3 0x49 /* Lens correction option 3 */
105 #define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
106 #define LCC5 0x4B /* Lens correction option 5 */
107 #define LCC6 0x4C /* Lens correction option 6 */
108 /* for ov7725 */
109 #define LC_CTR 0x46 /* Lens correction control */
110 #define LC_XC 0x47 /* X coordinate of lens correction center relative */
111 #define LC_YC 0x48 /* Y coordinate of lens correction center relative */
112 #define LC_COEF 0x49 /* Lens correction coefficient */
113 #define LC_RADI 0x4A /* Lens correction radius */
114 #define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
115 #define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
116
117 #define FIXGAIN 0x4D /* Analog fix gain amplifer */
118 #define AREF0 0x4E /* Sensor reference control */
119 #define AREF1 0x4F /* Sensor reference current control */
120 #define AREF2 0x50 /* Analog reference control */
121 #define AREF3 0x51 /* ADC reference control */
122 #define AREF4 0x52 /* ADC reference control */
123 #define AREF5 0x53 /* ADC reference control */
124 #define AREF6 0x54 /* Analog reference control */
125 #define AREF7 0x55 /* Analog reference control */
126 #define UFIX 0x60 /* U channel fixed value output */
127 #define VFIX 0x61 /* V channel fixed value output */
128 #define AWBB_BLK 0x62 /* AWB option for advanced AWB */
129 #define AWB_CTRL0 0x63 /* AWB control byte 0 */
130 #define DSP_CTRL1 0x64 /* DSP control byte 1 */
131 #define DSP_CTRL2 0x65 /* DSP control byte 2 */
132 #define DSP_CTRL3 0x66 /* DSP control byte 3 */
133 #define DSP_CTRL4 0x67 /* DSP control byte 4 */
134 #define AWB_BIAS 0x68 /* AWB BLC level clip */
135 #define AWB_CTRL1 0x69 /* AWB control 1 */
136 #define AWB_CTRL2 0x6A /* AWB control 2 */
137 #define AWB_CTRL3 0x6B /* AWB control 3 */
138 #define AWB_CTRL4 0x6C /* AWB control 4 */
139 #define AWB_CTRL5 0x6D /* AWB control 5 */
140 #define AWB_CTRL6 0x6E /* AWB control 6 */
141 #define AWB_CTRL7 0x6F /* AWB control 7 */
142 #define AWB_CTRL8 0x70 /* AWB control 8 */
143 #define AWB_CTRL9 0x71 /* AWB control 9 */
144 #define AWB_CTRL10 0x72 /* AWB control 10 */
145 #define AWB_CTRL11 0x73 /* AWB control 11 */
146 #define AWB_CTRL12 0x74 /* AWB control 12 */
147 #define AWB_CTRL13 0x75 /* AWB control 13 */
148 #define AWB_CTRL14 0x76 /* AWB control 14 */
149 #define AWB_CTRL15 0x77 /* AWB control 15 */
150 #define AWB_CTRL16 0x78 /* AWB control 16 */
151 #define AWB_CTRL17 0x79 /* AWB control 17 */
152 #define AWB_CTRL18 0x7A /* AWB control 18 */
153 #define AWB_CTRL19 0x7B /* AWB control 19 */
154 #define AWB_CTRL20 0x7C /* AWB control 20 */
155 #define AWB_CTRL21 0x7D /* AWB control 21 */
156 #define GAM1 0x7E /* Gamma Curve 1st segment input end point */
157 #define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
158 #define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
159 #define GAM4 0x81 /* Gamma Curve 4th segment input end point */
160 #define GAM5 0x82 /* Gamma Curve 5th segment input end point */
161 #define GAM6 0x83 /* Gamma Curve 6th segment input end point */
162 #define GAM7 0x84 /* Gamma Curve 7th segment input end point */
163 #define GAM8 0x85 /* Gamma Curve 8th segment input end point */
164 #define GAM9 0x86 /* Gamma Curve 9th segment input end point */
165 #define GAM10 0x87 /* Gamma Curve 10th segment input end point */
166 #define GAM11 0x88 /* Gamma Curve 11th segment input end point */
167 #define GAM12 0x89 /* Gamma Curve 12th segment input end point */
168 #define GAM13 0x8A /* Gamma Curve 13th segment input end point */
169 #define GAM14 0x8B /* Gamma Curve 14th segment input end point */
170 #define GAM15 0x8C /* Gamma Curve 15th segment input end point */
171 #define SLOP 0x8D /* Gamma curve highest segment slope */
172 #define DNSTH 0x8E /* De-noise threshold */
173 #define EDGE_STRNGT 0x8F /* Edge strength control when manual mode */
174 #define EDGE_TRSHLD 0x90 /* Edge threshold control when manual mode */
175 #define DNSOFF 0x91 /* Auto De-noise threshold control */
176 #define EDGE_UPPER 0x92 /* Edge strength upper limit when Auto mode */
177 #define EDGE_LOWER 0x93 /* Edge strength lower limit when Auto mode */
178 #define MTX1 0x94 /* Matrix coefficient 1 */
179 #define MTX2 0x95 /* Matrix coefficient 2 */
180 #define MTX3 0x96 /* Matrix coefficient 3 */
181 #define MTX4 0x97 /* Matrix coefficient 4 */
182 #define MTX5 0x98 /* Matrix coefficient 5 */
183 #define MTX6 0x99 /* Matrix coefficient 6 */
184 #define MTX_CTRL 0x9A /* Matrix control */
185 #define BRIGHT 0x9B /* Brightness control */
186 #define CNTRST 0x9C /* Contrast contrast */
187 #define CNTRST_CTRL 0x9D /* Contrast contrast center */
188 #define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
189 #define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
190 #define SCAL0 0xA0 /* Scaling control 0 */
191 #define SCAL1 0xA1 /* Scaling control 1 */
192 #define SCAL2 0xA2 /* Scaling control 2 */
193 #define FIFODLYM 0xA3 /* FIFO manual mode delay control */
194 #define FIFODLYA 0xA4 /* FIFO auto mode delay control */
195 #define SDE 0xA6 /* Special digital effect control */
196 #define USAT 0xA7 /* U component saturation control */
197 #define VSAT 0xA8 /* V component saturation control */
198 /* for ov7720 */
199 #define HUE0 0xA9 /* Hue control 0 */
200 #define HUE1 0xAA /* Hue control 1 */
201 /* for ov7725 */
202 #define HUECOS 0xA9 /* Cosine value */
203 #define HUESIN 0xAA /* Sine value */
204
205 #define SIGN 0xAB /* Sign bit for Hue and contrast */
206 #define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
207
208 /*
209 * register detail
210 */
211
212 /* COM2 */
213 #define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
214 /* Output drive capability */
215 #define OCAP_1x 0x00 /* 1x */
216 #define OCAP_2x 0x01 /* 2x */
217 #define OCAP_3x 0x02 /* 3x */
218 #define OCAP_4x 0x03 /* 4x */
219
220 /* COM3 */
221 #define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
222 #define IMG_MASK (VFLIP_IMG | HFLIP_IMG)
223
224 #define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
225 #define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
226 #define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
227 #define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
228 #define SWAP_ML 0x08 /* Swap output MSB/LSB */
229 /* Tri-state option for output clock */
230 #define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
231 /* 1: No tri-state at this period */
232 /* Tri-state option for output data */
233 #define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
234 /* 1: No tri-state at this period */
235 #define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
236
237 /* COM4 */
238 /* PLL frequency control */
239 #define PLL_BYPASS 0x00 /* 00: Bypass PLL */
240 #define PLL_4x 0x40 /* 01: PLL 4x */
241 #define PLL_6x 0x80 /* 10: PLL 6x */
242 #define PLL_8x 0xc0 /* 11: PLL 8x */
243 /* AEC evaluate window */
244 #define AEC_FULL 0x00 /* 00: Full window */
245 #define AEC_1p2 0x10 /* 01: 1/2 window */
246 #define AEC_1p4 0x20 /* 10: 1/4 window */
247 #define AEC_2p3 0x30 /* 11: Low 2/3 window */
248
249 /* COM5 */
250 #define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
251 #define AFR_SPPED 0x40 /* Auto frame rate control speed selection */
252 /* Auto frame rate max rate control */
253 #define AFR_NO_RATE 0x00 /* No reduction of frame rate */
254 #define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
255 #define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
256 #define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
257 /* Auto frame rate active point control */
258 #define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
259 #define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
260 #define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
261 #define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
262 /* AEC max step control */
263 #define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
264 /* 1 : No limit to AEC increase step */
265
266 /* COM7 */
267 /* SCCB Register Reset */
268 #define SCCB_RESET 0x80 /* 0 : No change */
269 /* 1 : Resets all registers to default */
270 /* Resolution selection */
271 #define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
272 #define SLCT_VGA 0x00 /* 0 : VGA */
273 #define SLCT_QVGA 0x40 /* 1 : QVGA */
274 #define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
275 /* RGB output format control */
276 #define FMT_MASK 0x0c /* Mask of color format */
277 #define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
278 #define FMT_RGB565 0x04 /* 01 : RGB 565 */
279 #define FMT_RGB555 0x08 /* 10 : RGB 555 */
280 #define FMT_RGB444 0x0c /* 11 : RGB 444 */
281 /* Output format control */
282 #define OFMT_MASK 0x03 /* Mask of output format */
283 #define OFMT_YUV 0x00 /* 00 : YUV */
284 #define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
285 #define OFMT_RGB 0x02 /* 10 : RGB */
286 #define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
287
288 /* COM8 */
289 #define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
290 /* AEC Setp size limit */
291 #define UNLMT_STEP 0x40 /* 0 : Step size is limited */
292 /* 1 : Unlimited step size */
293 #define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
294 #define AEC_BND 0x10 /* Enable AEC below banding value */
295 #define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
296 #define AGC_ON 0x04 /* AGC Enable */
297 #define AWB_ON 0x02 /* AWB Enable */
298 #define AEC_ON 0x01 /* AEC Enable */
299
300 /* COM9 */
301 #define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
302 /* Automatic gain ceiling - maximum AGC value */
303 #define GAIN_2x 0x00 /* 000 : 2x */
304 #define GAIN_4x 0x10 /* 001 : 4x */
305 #define GAIN_8x 0x20 /* 010 : 8x */
306 #define GAIN_16x 0x30 /* 011 : 16x */
307 #define GAIN_32x 0x40 /* 100 : 32x */
308 #define GAIN_64x 0x50 /* 101 : 64x */
309 #define GAIN_128x 0x60 /* 110 : 128x */
310 #define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
311 #define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
312
313 /* COM11 */
314 #define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
315 #define SGLF_TRIG 0x01 /* Single frame transfer trigger */
316
317 /* EXHCH */
318 #define VSIZE_LSB 0x04 /* Vertical data output size LSB */
319
320 /* DSP_CTRL1 */
321 #define FIFO_ON 0x80 /* FIFO enable/disable selection */
322 #define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
323 #define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
324 #define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
325 #define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
326 #define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
327 #define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
328 #define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
329
330 /* DSP_CTRL3 */
331 #define UV_MASK 0x80 /* UV output sequence option */
332 #define UV_ON 0x80 /* ON */
333 #define UV_OFF 0x00 /* OFF */
334 #define CBAR_MASK 0x20 /* DSP Color bar mask */
335 #define CBAR_ON 0x20 /* ON */
336 #define CBAR_OFF 0x00 /* OFF */
337
338 /* HSTART */
339 #define HST_VGA 0x23
340 #define HST_QVGA 0x3F
341
342 /* HSIZE */
343 #define HSZ_VGA 0xA0
344 #define HSZ_QVGA 0x50
345
346 /* VSTART */
347 #define VST_VGA 0x07
348 #define VST_QVGA 0x03
349
350 /* VSIZE */
351 #define VSZ_VGA 0xF0
352 #define VSZ_QVGA 0x78
353
354 /* HOUTSIZE */
355 #define HOSZ_VGA 0xA0
356 #define HOSZ_QVGA 0x50
357
358 /* VOUTSIZE */
359 #define VOSZ_VGA 0xF0
360 #define VOSZ_QVGA 0x78
361
362 /* DSPAUTO (DSP Auto Function ON/OFF Control) */
363 #define AWB_ACTRL 0x80 /* AWB auto threshold control */
364 #define DENOISE_ACTRL 0x40 /* De-noise auto threshold control */
365 #define EDGE_ACTRL 0x20 /* Edge enhancement auto strength control */
366 #define UV_ACTRL 0x10 /* UV adjust auto slope control */
367 #define SCAL0_ACTRL 0x08 /* Auto scaling factor control */
368 #define SCAL1_2_ACTRL 0x04 /* Auto scaling factor control */
369
370 /*
371 * ID
372 */
373 #define OV7720 0x7720
374 #define OV7725 0x7721
375 #define VERSION(pid, ver) ((pid<<8)|(ver&0xFF))
376
377 /*
378 * struct
379 */
380 struct regval_list {
381 unsigned char reg_num;
382 unsigned char value;
383 };
384
385 struct ov772x_color_format {
386 enum v4l2_mbus_pixelcode code;
387 enum v4l2_colorspace colorspace;
388 u8 dsp3;
389 u8 com3;
390 u8 com7;
391 };
392
393 struct ov772x_win_size {
394 char *name;
395 __u32 width;
396 __u32 height;
397 unsigned char com7_bit;
398 const struct regval_list *regs;
399 };
400
401 struct ov772x_priv {
402 struct v4l2_subdev subdev;
403 struct ov772x_camera_info *info;
404 const struct ov772x_color_format *cfmt;
405 const struct ov772x_win_size *win;
406 int model;
407 unsigned short flag_vflip:1;
408 unsigned short flag_hflip:1;
409 /* band_filter = COM8[5] ? 256 - BDBASE : 0 */
410 unsigned short band_filter;
411 };
412
413 #define ENDMARKER { 0xff, 0xff }
414
415 /*
416 * register setting for window size
417 */
418 static const struct regval_list ov772x_qvga_regs[] = {
419 { HSTART, HST_QVGA },
420 { HSIZE, HSZ_QVGA },
421 { VSTART, VST_QVGA },
422 { VSIZE, VSZ_QVGA },
423 { HOUTSIZE, HOSZ_QVGA },
424 { VOUTSIZE, VOSZ_QVGA },
425 ENDMARKER,
426 };
427
428 static const struct regval_list ov772x_vga_regs[] = {
429 { HSTART, HST_VGA },
430 { HSIZE, HSZ_VGA },
431 { VSTART, VST_VGA },
432 { VSIZE, VSZ_VGA },
433 { HOUTSIZE, HOSZ_VGA },
434 { VOUTSIZE, VOSZ_VGA },
435 ENDMARKER,
436 };
437
438 /*
439 * supported color format list
440 */
441 static const struct ov772x_color_format ov772x_cfmts[] = {
442 {
443 .code = V4L2_MBUS_FMT_YUYV8_2X8,
444 .colorspace = V4L2_COLORSPACE_JPEG,
445 .dsp3 = 0x0,
446 .com3 = SWAP_YUV,
447 .com7 = OFMT_YUV,
448 },
449 {
450 .code = V4L2_MBUS_FMT_YVYU8_2X8,
451 .colorspace = V4L2_COLORSPACE_JPEG,
452 .dsp3 = UV_ON,
453 .com3 = SWAP_YUV,
454 .com7 = OFMT_YUV,
455 },
456 {
457 .code = V4L2_MBUS_FMT_UYVY8_2X8,
458 .colorspace = V4L2_COLORSPACE_JPEG,
459 .dsp3 = 0x0,
460 .com3 = 0x0,
461 .com7 = OFMT_YUV,
462 },
463 {
464 .code = V4L2_MBUS_FMT_RGB555_2X8_PADHI_LE,
465 .colorspace = V4L2_COLORSPACE_SRGB,
466 .dsp3 = 0x0,
467 .com3 = SWAP_RGB,
468 .com7 = FMT_RGB555 | OFMT_RGB,
469 },
470 {
471 .code = V4L2_MBUS_FMT_RGB555_2X8_PADHI_BE,
472 .colorspace = V4L2_COLORSPACE_SRGB,
473 .dsp3 = 0x0,
474 .com3 = 0x0,
475 .com7 = FMT_RGB555 | OFMT_RGB,
476 },
477 {
478 .code = V4L2_MBUS_FMT_RGB565_2X8_LE,
479 .colorspace = V4L2_COLORSPACE_SRGB,
480 .dsp3 = 0x0,
481 .com3 = SWAP_RGB,
482 .com7 = FMT_RGB565 | OFMT_RGB,
483 },
484 {
485 .code = V4L2_MBUS_FMT_RGB565_2X8_BE,
486 .colorspace = V4L2_COLORSPACE_SRGB,
487 .dsp3 = 0x0,
488 .com3 = 0x0,
489 .com7 = FMT_RGB565 | OFMT_RGB,
490 },
491 };
492
493
494 /*
495 * window size list
496 */
497 #define VGA_WIDTH 640
498 #define VGA_HEIGHT 480
499 #define QVGA_WIDTH 320
500 #define QVGA_HEIGHT 240
501 #define MAX_WIDTH VGA_WIDTH
502 #define MAX_HEIGHT VGA_HEIGHT
503
504 static const struct ov772x_win_size ov772x_win_vga = {
505 .name = "VGA",
506 .width = VGA_WIDTH,
507 .height = VGA_HEIGHT,
508 .com7_bit = SLCT_VGA,
509 .regs = ov772x_vga_regs,
510 };
511
512 static const struct ov772x_win_size ov772x_win_qvga = {
513 .name = "QVGA",
514 .width = QVGA_WIDTH,
515 .height = QVGA_HEIGHT,
516 .com7_bit = SLCT_QVGA,
517 .regs = ov772x_qvga_regs,
518 };
519
520 static const struct v4l2_queryctrl ov772x_controls[] = {
521 {
522 .id = V4L2_CID_VFLIP,
523 .type = V4L2_CTRL_TYPE_BOOLEAN,
524 .name = "Flip Vertically",
525 .minimum = 0,
526 .maximum = 1,
527 .step = 1,
528 .default_value = 0,
529 },
530 {
531 .id = V4L2_CID_HFLIP,
532 .type = V4L2_CTRL_TYPE_BOOLEAN,
533 .name = "Flip Horizontally",
534 .minimum = 0,
535 .maximum = 1,
536 .step = 1,
537 .default_value = 0,
538 },
539 {
540 .id = V4L2_CID_BAND_STOP_FILTER,
541 .type = V4L2_CTRL_TYPE_INTEGER,
542 .name = "Band-stop filter",
543 .minimum = 0,
544 .maximum = 256,
545 .step = 1,
546 .default_value = 0,
547 },
548 };
549
550 /*
551 * general function
552 */
553
554 static struct ov772x_priv *to_ov772x(const struct i2c_client *client)
555 {
556 return container_of(i2c_get_clientdata(client), struct ov772x_priv,
557 subdev);
558 }
559
560 static int ov772x_write_array(struct i2c_client *client,
561 const struct regval_list *vals)
562 {
563 while (vals->reg_num != 0xff) {
564 int ret = i2c_smbus_write_byte_data(client,
565 vals->reg_num,
566 vals->value);
567 if (ret < 0)
568 return ret;
569 vals++;
570 }
571 return 0;
572 }
573
574 static int ov772x_mask_set(struct i2c_client *client,
575 u8 command,
576 u8 mask,
577 u8 set)
578 {
579 s32 val = i2c_smbus_read_byte_data(client, command);
580 if (val < 0)
581 return val;
582
583 val &= ~mask;
584 val |= set & mask;
585
586 return i2c_smbus_write_byte_data(client, command, val);
587 }
588
589 static int ov772x_reset(struct i2c_client *client)
590 {
591 int ret = i2c_smbus_write_byte_data(client, COM7, SCCB_RESET);
592 msleep(1);
593 return ret;
594 }
595
596 /*
597 * soc_camera_ops function
598 */
599
600 static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
601 {
602 struct i2c_client *client = v4l2_get_subdevdata(sd);
603 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
604
605 if (!enable) {
606 ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, SOFT_SLEEP_MODE);
607 return 0;
608 }
609
610 if (!priv->win || !priv->cfmt) {
611 dev_err(&client->dev, "norm or win select error\n");
612 return -EPERM;
613 }
614
615 ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, 0);
616
617 dev_dbg(&client->dev, "format %d, win %s\n",
618 priv->cfmt->code, priv->win->name);
619
620 return 0;
621 }
622
623 static int ov772x_set_bus_param(struct soc_camera_device *icd,
624 unsigned long flags)
625 {
626 return 0;
627 }
628
629 static unsigned long ov772x_query_bus_param(struct soc_camera_device *icd)
630 {
631 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
632 struct ov772x_priv *priv = i2c_get_clientdata(client);
633 struct soc_camera_link *icl = to_soc_camera_link(icd);
634 unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
635 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
636 SOCAM_DATA_ACTIVE_HIGH;
637
638 if (priv->info->flags & OV772X_FLAG_8BIT)
639 flags |= SOCAM_DATAWIDTH_8;
640 else
641 flags |= SOCAM_DATAWIDTH_10;
642
643 return soc_camera_apply_sensor_flags(icl, flags);
644 }
645
646 static int ov772x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
647 {
648 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
649
650 switch (ctrl->id) {
651 case V4L2_CID_VFLIP:
652 ctrl->value = priv->flag_vflip;
653 break;
654 case V4L2_CID_HFLIP:
655 ctrl->value = priv->flag_hflip;
656 break;
657 case V4L2_CID_BAND_STOP_FILTER:
658 ctrl->value = priv->band_filter;
659 break;
660 }
661 return 0;
662 }
663
664 static int ov772x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
665 {
666 struct i2c_client *client = v4l2_get_subdevdata(sd);
667 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
668 int ret = 0;
669 u8 val;
670
671 switch (ctrl->id) {
672 case V4L2_CID_VFLIP:
673 val = ctrl->value ? VFLIP_IMG : 0x00;
674 priv->flag_vflip = ctrl->value;
675 if (priv->info->flags & OV772X_FLAG_VFLIP)
676 val ^= VFLIP_IMG;
677 ret = ov772x_mask_set(client, COM3, VFLIP_IMG, val);
678 break;
679 case V4L2_CID_HFLIP:
680 val = ctrl->value ? HFLIP_IMG : 0x00;
681 priv->flag_hflip = ctrl->value;
682 if (priv->info->flags & OV772X_FLAG_HFLIP)
683 val ^= HFLIP_IMG;
684 ret = ov772x_mask_set(client, COM3, HFLIP_IMG, val);
685 break;
686 case V4L2_CID_BAND_STOP_FILTER:
687 if ((unsigned)ctrl->value > 256)
688 ctrl->value = 256;
689 if (ctrl->value == priv->band_filter)
690 break;
691 if (!ctrl->value) {
692 /* Switch the filter off, it is on now */
693 ret = ov772x_mask_set(client, BDBASE, 0xff, 0xff);
694 if (!ret)
695 ret = ov772x_mask_set(client, COM8,
696 BNDF_ON_OFF, 0);
697 } else {
698 /* Switch the filter on, set AEC low limit */
699 val = 256 - ctrl->value;
700 ret = ov772x_mask_set(client, COM8,
701 BNDF_ON_OFF, BNDF_ON_OFF);
702 if (!ret)
703 ret = ov772x_mask_set(client, BDBASE,
704 0xff, val);
705 }
706 if (!ret)
707 priv->band_filter = ctrl->value;
708 break;
709 }
710
711 return ret;
712 }
713
714 static int ov772x_g_chip_ident(struct v4l2_subdev *sd,
715 struct v4l2_dbg_chip_ident *id)
716 {
717 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
718
719 id->ident = priv->model;
720 id->revision = 0;
721
722 return 0;
723 }
724
725 #ifdef CONFIG_VIDEO_ADV_DEBUG
726 static int ov772x_g_register(struct v4l2_subdev *sd,
727 struct v4l2_dbg_register *reg)
728 {
729 struct i2c_client *client = v4l2_get_subdevdata(sd);
730 int ret;
731
732 reg->size = 1;
733 if (reg->reg > 0xff)
734 return -EINVAL;
735
736 ret = i2c_smbus_read_byte_data(client, reg->reg);
737 if (ret < 0)
738 return ret;
739
740 reg->val = (__u64)ret;
741
742 return 0;
743 }
744
745 static int ov772x_s_register(struct v4l2_subdev *sd,
746 struct v4l2_dbg_register *reg)
747 {
748 struct i2c_client *client = v4l2_get_subdevdata(sd);
749
750 if (reg->reg > 0xff ||
751 reg->val > 0xff)
752 return -EINVAL;
753
754 return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
755 }
756 #endif
757
758 static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height)
759 {
760 __u32 diff;
761 const struct ov772x_win_size *win;
762
763 /* default is QVGA */
764 diff = abs(width - ov772x_win_qvga.width) +
765 abs(height - ov772x_win_qvga.height);
766 win = &ov772x_win_qvga;
767
768 /* VGA */
769 if (diff >
770 abs(width - ov772x_win_vga.width) +
771 abs(height - ov772x_win_vga.height))
772 win = &ov772x_win_vga;
773
774 return win;
775 }
776
777 static int ov772x_set_params(struct i2c_client *client, u32 *width, u32 *height,
778 enum v4l2_mbus_pixelcode code)
779 {
780 struct ov772x_priv *priv = to_ov772x(client);
781 int ret = -EINVAL;
782 u8 val;
783 int i;
784
785 /*
786 * select format
787 */
788 priv->cfmt = NULL;
789 for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
790 if (code == ov772x_cfmts[i].code) {
791 priv->cfmt = ov772x_cfmts + i;
792 break;
793 }
794 }
795 if (!priv->cfmt)
796 goto ov772x_set_fmt_error;
797
798 /*
799 * select win
800 */
801 priv->win = ov772x_select_win(*width, *height);
802
803 /*
804 * reset hardware
805 */
806 ov772x_reset(client);
807
808 /*
809 * Edge Ctrl
810 */
811 if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
812
813 /*
814 * Manual Edge Control Mode
815 *
816 * Edge auto strength bit is set by default.
817 * Remove it when manual mode.
818 */
819
820 ret = ov772x_mask_set(client, DSPAUTO, EDGE_ACTRL, 0x00);
821 if (ret < 0)
822 goto ov772x_set_fmt_error;
823
824 ret = ov772x_mask_set(client,
825 EDGE_TRSHLD, EDGE_THRESHOLD_MASK,
826 priv->info->edgectrl.threshold);
827 if (ret < 0)
828 goto ov772x_set_fmt_error;
829
830 ret = ov772x_mask_set(client,
831 EDGE_STRNGT, EDGE_STRENGTH_MASK,
832 priv->info->edgectrl.strength);
833 if (ret < 0)
834 goto ov772x_set_fmt_error;
835
836 } else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
837 /*
838 * Auto Edge Control Mode
839 *
840 * set upper and lower limit
841 */
842 ret = ov772x_mask_set(client,
843 EDGE_UPPER, EDGE_UPPER_MASK,
844 priv->info->edgectrl.upper);
845 if (ret < 0)
846 goto ov772x_set_fmt_error;
847
848 ret = ov772x_mask_set(client,
849 EDGE_LOWER, EDGE_LOWER_MASK,
850 priv->info->edgectrl.lower);
851 if (ret < 0)
852 goto ov772x_set_fmt_error;
853 }
854
855 /*
856 * set size format
857 */
858 ret = ov772x_write_array(client, priv->win->regs);
859 if (ret < 0)
860 goto ov772x_set_fmt_error;
861
862 /*
863 * set DSP_CTRL3
864 */
865 val = priv->cfmt->dsp3;
866 if (val) {
867 ret = ov772x_mask_set(client,
868 DSP_CTRL3, UV_MASK, val);
869 if (ret < 0)
870 goto ov772x_set_fmt_error;
871 }
872
873 /*
874 * set COM3
875 */
876 val = priv->cfmt->com3;
877 if (priv->info->flags & OV772X_FLAG_VFLIP)
878 val |= VFLIP_IMG;
879 if (priv->info->flags & OV772X_FLAG_HFLIP)
880 val |= HFLIP_IMG;
881 if (priv->flag_vflip)
882 val ^= VFLIP_IMG;
883 if (priv->flag_hflip)
884 val ^= HFLIP_IMG;
885
886 ret = ov772x_mask_set(client,
887 COM3, SWAP_MASK | IMG_MASK, val);
888 if (ret < 0)
889 goto ov772x_set_fmt_error;
890
891 /*
892 * set COM7
893 */
894 val = priv->win->com7_bit | priv->cfmt->com7;
895 ret = ov772x_mask_set(client,
896 COM7, SLCT_MASK | FMT_MASK | OFMT_MASK,
897 val);
898 if (ret < 0)
899 goto ov772x_set_fmt_error;
900
901 /*
902 * set COM8
903 */
904 if (priv->band_filter) {
905 ret = ov772x_mask_set(client, COM8, BNDF_ON_OFF, 1);
906 if (!ret)
907 ret = ov772x_mask_set(client, BDBASE,
908 0xff, 256 - priv->band_filter);
909 if (ret < 0)
910 goto ov772x_set_fmt_error;
911 }
912
913 *width = priv->win->width;
914 *height = priv->win->height;
915
916 return ret;
917
918 ov772x_set_fmt_error:
919
920 ov772x_reset(client);
921 priv->win = NULL;
922 priv->cfmt = NULL;
923
924 return ret;
925 }
926
927 static int ov772x_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
928 {
929 a->c.left = 0;
930 a->c.top = 0;
931 a->c.width = VGA_WIDTH;
932 a->c.height = VGA_HEIGHT;
933 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
934
935 return 0;
936 }
937
938 static int ov772x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
939 {
940 a->bounds.left = 0;
941 a->bounds.top = 0;
942 a->bounds.width = VGA_WIDTH;
943 a->bounds.height = VGA_HEIGHT;
944 a->defrect = a->bounds;
945 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
946 a->pixelaspect.numerator = 1;
947 a->pixelaspect.denominator = 1;
948
949 return 0;
950 }
951
952 static int ov772x_g_fmt(struct v4l2_subdev *sd,
953 struct v4l2_mbus_framefmt *mf)
954 {
955 struct i2c_client *client = v4l2_get_subdevdata(sd);
956 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
957
958 if (!priv->win || !priv->cfmt) {
959 u32 width = VGA_WIDTH, height = VGA_HEIGHT;
960 int ret = ov772x_set_params(client, &width, &height,
961 V4L2_MBUS_FMT_YUYV8_2X8);
962 if (ret < 0)
963 return ret;
964 }
965
966 mf->width = priv->win->width;
967 mf->height = priv->win->height;
968 mf->code = priv->cfmt->code;
969 mf->colorspace = priv->cfmt->colorspace;
970 mf->field = V4L2_FIELD_NONE;
971
972 return 0;
973 }
974
975 static int ov772x_s_fmt(struct v4l2_subdev *sd,
976 struct v4l2_mbus_framefmt *mf)
977 {
978 struct i2c_client *client = v4l2_get_subdevdata(sd);
979 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
980 int ret = ov772x_set_params(client, &mf->width, &mf->height,
981 mf->code);
982
983 if (!ret)
984 mf->colorspace = priv->cfmt->colorspace;
985
986 return ret;
987 }
988
989 static int ov772x_try_fmt(struct v4l2_subdev *sd,
990 struct v4l2_mbus_framefmt *mf)
991 {
992 struct ov772x_priv *priv = container_of(sd, struct ov772x_priv, subdev);
993 const struct ov772x_win_size *win;
994 int i;
995
996 /*
997 * select suitable win
998 */
999 win = ov772x_select_win(mf->width, mf->height);
1000
1001 mf->width = win->width;
1002 mf->height = win->height;
1003 mf->field = V4L2_FIELD_NONE;
1004
1005 for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++)
1006 if (mf->code == ov772x_cfmts[i].code)
1007 break;
1008
1009 if (i == ARRAY_SIZE(ov772x_cfmts)) {
1010 /* Unsupported format requested. Propose either */
1011 if (priv->cfmt) {
1012 /* the current one or */
1013 mf->colorspace = priv->cfmt->colorspace;
1014 mf->code = priv->cfmt->code;
1015 } else {
1016 /* the default one */
1017 mf->colorspace = ov772x_cfmts[0].colorspace;
1018 mf->code = ov772x_cfmts[0].code;
1019 }
1020 } else {
1021 /* Also return the colorspace */
1022 mf->colorspace = ov772x_cfmts[i].colorspace;
1023 }
1024
1025 return 0;
1026 }
1027
1028 static int ov772x_video_probe(struct soc_camera_device *icd,
1029 struct i2c_client *client)
1030 {
1031 struct ov772x_priv *priv = to_ov772x(client);
1032 u8 pid, ver;
1033 const char *devname;
1034
1035 /*
1036 * We must have a parent by now. And it cannot be a wrong one.
1037 * So this entire test is completely redundant.
1038 */
1039 if (!icd->dev.parent ||
1040 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
1041 return -ENODEV;
1042
1043 /*
1044 * check and show product ID and manufacturer ID
1045 */
1046 pid = i2c_smbus_read_byte_data(client, PID);
1047 ver = i2c_smbus_read_byte_data(client, VER);
1048
1049 switch (VERSION(pid, ver)) {
1050 case OV7720:
1051 devname = "ov7720";
1052 priv->model = V4L2_IDENT_OV7720;
1053 break;
1054 case OV7725:
1055 devname = "ov7725";
1056 priv->model = V4L2_IDENT_OV7725;
1057 break;
1058 default:
1059 dev_err(&client->dev,
1060 "Product ID error %x:%x\n", pid, ver);
1061 return -ENODEV;
1062 }
1063
1064 dev_info(&client->dev,
1065 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
1066 devname,
1067 pid,
1068 ver,
1069 i2c_smbus_read_byte_data(client, MIDH),
1070 i2c_smbus_read_byte_data(client, MIDL));
1071
1072 return 0;
1073 }
1074
1075 static struct soc_camera_ops ov772x_ops = {
1076 .set_bus_param = ov772x_set_bus_param,
1077 .query_bus_param = ov772x_query_bus_param,
1078 .controls = ov772x_controls,
1079 .num_controls = ARRAY_SIZE(ov772x_controls),
1080 };
1081
1082 static struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
1083 .g_ctrl = ov772x_g_ctrl,
1084 .s_ctrl = ov772x_s_ctrl,
1085 .g_chip_ident = ov772x_g_chip_ident,
1086 #ifdef CONFIG_VIDEO_ADV_DEBUG
1087 .g_register = ov772x_g_register,
1088 .s_register = ov772x_s_register,
1089 #endif
1090 };
1091
1092 static int ov772x_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
1093 enum v4l2_mbus_pixelcode *code)
1094 {
1095 if (index >= ARRAY_SIZE(ov772x_cfmts))
1096 return -EINVAL;
1097
1098 *code = ov772x_cfmts[index].code;
1099 return 0;
1100 }
1101
1102 static struct v4l2_subdev_video_ops ov772x_subdev_video_ops = {
1103 .s_stream = ov772x_s_stream,
1104 .g_mbus_fmt = ov772x_g_fmt,
1105 .s_mbus_fmt = ov772x_s_fmt,
1106 .try_mbus_fmt = ov772x_try_fmt,
1107 .cropcap = ov772x_cropcap,
1108 .g_crop = ov772x_g_crop,
1109 .enum_mbus_fmt = ov772x_enum_fmt,
1110 };
1111
1112 static struct v4l2_subdev_ops ov772x_subdev_ops = {
1113 .core = &ov772x_subdev_core_ops,
1114 .video = &ov772x_subdev_video_ops,
1115 };
1116
1117 /*
1118 * i2c_driver function
1119 */
1120
1121 static int ov772x_probe(struct i2c_client *client,
1122 const struct i2c_device_id *did)
1123 {
1124 struct ov772x_priv *priv;
1125 struct soc_camera_device *icd = client->dev.platform_data;
1126 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1127 struct soc_camera_link *icl;
1128 int ret;
1129
1130 if (!icd) {
1131 dev_err(&client->dev, "OV772X: missing soc-camera data!\n");
1132 return -EINVAL;
1133 }
1134
1135 icl = to_soc_camera_link(icd);
1136 if (!icl || !icl->priv)
1137 return -EINVAL;
1138
1139 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1140 dev_err(&adapter->dev,
1141 "I2C-Adapter doesn't support "
1142 "I2C_FUNC_SMBUS_BYTE_DATA\n");
1143 return -EIO;
1144 }
1145
1146 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1147 if (!priv)
1148 return -ENOMEM;
1149
1150 priv->info = icl->priv;
1151
1152 v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
1153
1154 icd->ops = &ov772x_ops;
1155
1156 ret = ov772x_video_probe(icd, client);
1157 if (ret) {
1158 icd->ops = NULL;
1159 kfree(priv);
1160 }
1161
1162 return ret;
1163 }
1164
1165 static int ov772x_remove(struct i2c_client *client)
1166 {
1167 struct ov772x_priv *priv = to_ov772x(client);
1168 struct soc_camera_device *icd = client->dev.platform_data;
1169
1170 icd->ops = NULL;
1171 kfree(priv);
1172 return 0;
1173 }
1174
1175 static const struct i2c_device_id ov772x_id[] = {
1176 { "ov772x", 0 },
1177 { }
1178 };
1179 MODULE_DEVICE_TABLE(i2c, ov772x_id);
1180
1181 static struct i2c_driver ov772x_i2c_driver = {
1182 .driver = {
1183 .name = "ov772x",
1184 },
1185 .probe = ov772x_probe,
1186 .remove = ov772x_remove,
1187 .id_table = ov772x_id,
1188 };
1189
1190 /*
1191 * module function
1192 */
1193
1194 static int __init ov772x_module_init(void)
1195 {
1196 return i2c_add_driver(&ov772x_i2c_driver);
1197 }
1198
1199 static void __exit ov772x_module_exit(void)
1200 {
1201 i2c_del_driver(&ov772x_i2c_driver);
1202 }
1203
1204 module_init(ov772x_module_init);
1205 module_exit(ov772x_module_exit);
1206
1207 MODULE_DESCRIPTION("SoC Camera driver for ov772x");
1208 MODULE_AUTHOR("Kuninori Morimoto");
1209 MODULE_LICENSE("GPL v2");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree