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x86/amd-iommu: Add function to complete a tlb flush
[linux/fpc-iii.git] / drivers / media / video / ov772x.c
blobeccb40ab7fec1b1f66dad52dd30a77916e98fa8b
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/ov772x.h>
28
29 /*
30 * register offset
31 */
32 #define GAIN 0x00 /* AGC - Gain control gain setting */
33 #define BLUE 0x01 /* AWB - Blue channel gain setting */
34 #define RED 0x02 /* AWB - Red channel gain setting */
35 #define GREEN 0x03 /* AWB - Green channel gain setting */
36 #define COM1 0x04 /* Common control 1 */
37 #define BAVG 0x05 /* U/B Average Level */
38 #define GAVG 0x06 /* Y/Gb Average Level */
39 #define RAVG 0x07 /* V/R Average Level */
40 #define AECH 0x08 /* Exposure Value - AEC MSBs */
41 #define COM2 0x09 /* Common control 2 */
42 #define PID 0x0A /* Product ID Number MSB */
43 #define VER 0x0B /* Product ID Number LSB */
44 #define COM3 0x0C /* Common control 3 */
45 #define COM4 0x0D /* Common control 4 */
46 #define COM5 0x0E /* Common control 5 */
47 #define COM6 0x0F /* Common control 6 */
48 #define AEC 0x10 /* Exposure Value */
49 #define CLKRC 0x11 /* Internal clock */
50 #define COM7 0x12 /* Common control 7 */
51 #define COM8 0x13 /* Common control 8 */
52 #define COM9 0x14 /* Common control 9 */
53 #define COM10 0x15 /* Common control 10 */
54 #define REG16 0x16 /* Register 16 */
55 #define HSTART 0x17 /* Horizontal sensor size */
56 #define HSIZE 0x18 /* Horizontal frame (HREF column) end high 8-bit */
57 #define VSTART 0x19 /* Vertical frame (row) start high 8-bit */
58 #define VSIZE 0x1A /* Vertical sensor size */
59 #define PSHFT 0x1B /* Data format - pixel delay select */
60 #define MIDH 0x1C /* Manufacturer ID byte - high */
61 #define MIDL 0x1D /* Manufacturer ID byte - low */
62 #define LAEC 0x1F /* Fine AEC value */
63 #define COM11 0x20 /* Common control 11 */
64 #define BDBASE 0x22 /* Banding filter Minimum AEC value */
65 #define DBSTEP 0x23 /* Banding filter Maximum Setp */
66 #define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
67 #define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
68 #define VPT 0x26 /* AGC/AEC Fast mode operating region */
69 #define REG28 0x28 /* Register 28 */
70 #define HOUTSIZE 0x29 /* Horizontal data output size MSBs */
71 #define EXHCH 0x2A /* Dummy pixel insert MSB */
72 #define EXHCL 0x2B /* Dummy pixel insert LSB */
73 #define VOUTSIZE 0x2C /* Vertical data output size MSBs */
74 #define ADVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
75 #define ADVFH 0x2E /* MSG of insert dummy lines in Vertical direction */
76 #define YAVE 0x2F /* Y/G Channel Average value */
77 #define LUMHTH 0x30 /* Histogram AEC/AGC Luminance high level threshold */
78 #define LUMLTH 0x31 /* Histogram AEC/AGC Luminance low level threshold */
79 #define HREF 0x32 /* Image start and size control */
80 #define DM_LNL 0x33 /* Dummy line low 8 bits */
81 #define DM_LNH 0x34 /* Dummy line high 8 bits */
82 #define ADOFF_B 0x35 /* AD offset compensation value for B channel */
83 #define ADOFF_R 0x36 /* AD offset compensation value for R channel */
84 #define ADOFF_GB 0x37 /* AD offset compensation value for Gb channel */
85 #define ADOFF_GR 0x38 /* AD offset compensation value for Gr channel */
86 #define OFF_B 0x39 /* Analog process B channel offset value */
87 #define OFF_R 0x3A /* Analog process R channel offset value */
88 #define OFF_GB 0x3B /* Analog process Gb channel offset value */
89 #define OFF_GR 0x3C /* Analog process Gr channel offset value */
90 #define COM12 0x3D /* Common control 12 */
91 #define COM13 0x3E /* Common control 13 */
92 #define COM14 0x3F /* Common control 14 */
93 #define COM15 0x40 /* Common control 15*/
94 #define COM16 0x41 /* Common control 16 */
95 #define TGT_B 0x42 /* BLC blue channel target value */
96 #define TGT_R 0x43 /* BLC red channel target value */
97 #define TGT_GB 0x44 /* BLC Gb channel target value */
98 #define TGT_GR 0x45 /* BLC Gr channel target value */
99 /* for ov7720 */
100 #define LCC0 0x46 /* Lens correction control 0 */
101 #define LCC1 0x47 /* Lens correction option 1 - X coordinate */
102 #define LCC2 0x48 /* Lens correction option 2 - Y coordinate */
103 #define LCC3 0x49 /* Lens correction option 3 */
104 #define LCC4 0x4A /* Lens correction option 4 - radius of the circular */
105 #define LCC5 0x4B /* Lens correction option 5 */
106 #define LCC6 0x4C /* Lens correction option 6 */
107 /* for ov7725 */
108 #define LC_CTR 0x46 /* Lens correction control */
109 #define LC_XC 0x47 /* X coordinate of lens correction center relative */
110 #define LC_YC 0x48 /* Y coordinate of lens correction center relative */
111 #define LC_COEF 0x49 /* Lens correction coefficient */
112 #define LC_RADI 0x4A /* Lens correction radius */
113 #define LC_COEFB 0x4B /* Lens B channel compensation coefficient */
114 #define LC_COEFR 0x4C /* Lens R channel compensation coefficient */
115
116 #define FIXGAIN 0x4D /* Analog fix gain amplifer */
117 #define AREF0 0x4E /* Sensor reference control */
118 #define AREF1 0x4F /* Sensor reference current control */
119 #define AREF2 0x50 /* Analog reference control */
120 #define AREF3 0x51 /* ADC reference control */
121 #define AREF4 0x52 /* ADC reference control */
122 #define AREF5 0x53 /* ADC reference control */
123 #define AREF6 0x54 /* Analog reference control */
124 #define AREF7 0x55 /* Analog reference control */
125 #define UFIX 0x60 /* U channel fixed value output */
126 #define VFIX 0x61 /* V channel fixed value output */
127 #define AWBB_BLK 0x62 /* AWB option for advanced AWB */
128 #define AWB_CTRL0 0x63 /* AWB control byte 0 */
129 #define DSP_CTRL1 0x64 /* DSP control byte 1 */
130 #define DSP_CTRL2 0x65 /* DSP control byte 2 */
131 #define DSP_CTRL3 0x66 /* DSP control byte 3 */
132 #define DSP_CTRL4 0x67 /* DSP control byte 4 */
133 #define AWB_BIAS 0x68 /* AWB BLC level clip */
134 #define AWB_CTRL1 0x69 /* AWB control 1 */
135 #define AWB_CTRL2 0x6A /* AWB control 2 */
136 #define AWB_CTRL3 0x6B /* AWB control 3 */
137 #define AWB_CTRL4 0x6C /* AWB control 4 */
138 #define AWB_CTRL5 0x6D /* AWB control 5 */
139 #define AWB_CTRL6 0x6E /* AWB control 6 */
140 #define AWB_CTRL7 0x6F /* AWB control 7 */
141 #define AWB_CTRL8 0x70 /* AWB control 8 */
142 #define AWB_CTRL9 0x71 /* AWB control 9 */
143 #define AWB_CTRL10 0x72 /* AWB control 10 */
144 #define AWB_CTRL11 0x73 /* AWB control 11 */
145 #define AWB_CTRL12 0x74 /* AWB control 12 */
146 #define AWB_CTRL13 0x75 /* AWB control 13 */
147 #define AWB_CTRL14 0x76 /* AWB control 14 */
148 #define AWB_CTRL15 0x77 /* AWB control 15 */
149 #define AWB_CTRL16 0x78 /* AWB control 16 */
150 #define AWB_CTRL17 0x79 /* AWB control 17 */
151 #define AWB_CTRL18 0x7A /* AWB control 18 */
152 #define AWB_CTRL19 0x7B /* AWB control 19 */
153 #define AWB_CTRL20 0x7C /* AWB control 20 */
154 #define AWB_CTRL21 0x7D /* AWB control 21 */
155 #define GAM1 0x7E /* Gamma Curve 1st segment input end point */
156 #define GAM2 0x7F /* Gamma Curve 2nd segment input end point */
157 #define GAM3 0x80 /* Gamma Curve 3rd segment input end point */
158 #define GAM4 0x81 /* Gamma Curve 4th segment input end point */
159 #define GAM5 0x82 /* Gamma Curve 5th segment input end point */
160 #define GAM6 0x83 /* Gamma Curve 6th segment input end point */
161 #define GAM7 0x84 /* Gamma Curve 7th segment input end point */
162 #define GAM8 0x85 /* Gamma Curve 8th segment input end point */
163 #define GAM9 0x86 /* Gamma Curve 9th segment input end point */
164 #define GAM10 0x87 /* Gamma Curve 10th segment input end point */
165 #define GAM11 0x88 /* Gamma Curve 11th segment input end point */
166 #define GAM12 0x89 /* Gamma Curve 12th segment input end point */
167 #define GAM13 0x8A /* Gamma Curve 13th segment input end point */
168 #define GAM14 0x8B /* Gamma Curve 14th segment input end point */
169 #define GAM15 0x8C /* Gamma Curve 15th segment input end point */
170 #define SLOP 0x8D /* Gamma curve highest segment slope */
171 #define DNSTH 0x8E /* De-noise threshold */
172 #define EDGE_STRNGT 0x8F /* Edge strength control when manual mode */
173 #define EDGE_TRSHLD 0x90 /* Edge threshold control when manual mode */
174 #define DNSOFF 0x91 /* Auto De-noise threshold control */
175 #define EDGE_UPPER 0x92 /* Edge strength upper limit when Auto mode */
176 #define EDGE_LOWER 0x93 /* Edge strength lower limit when Auto mode */
177 #define MTX1 0x94 /* Matrix coefficient 1 */
178 #define MTX2 0x95 /* Matrix coefficient 2 */
179 #define MTX3 0x96 /* Matrix coefficient 3 */
180 #define MTX4 0x97 /* Matrix coefficient 4 */
181 #define MTX5 0x98 /* Matrix coefficient 5 */
182 #define MTX6 0x99 /* Matrix coefficient 6 */
183 #define MTX_CTRL 0x9A /* Matrix control */
184 #define BRIGHT 0x9B /* Brightness control */
185 #define CNTRST 0x9C /* Contrast contrast */
186 #define CNTRST_CTRL 0x9D /* Contrast contrast center */
187 #define UVAD_J0 0x9E /* Auto UV adjust contrast 0 */
188 #define UVAD_J1 0x9F /* Auto UV adjust contrast 1 */
189 #define SCAL0 0xA0 /* Scaling control 0 */
190 #define SCAL1 0xA1 /* Scaling control 1 */
191 #define SCAL2 0xA2 /* Scaling control 2 */
192 #define FIFODLYM 0xA3 /* FIFO manual mode delay control */
193 #define FIFODLYA 0xA4 /* FIFO auto mode delay control */
194 #define SDE 0xA6 /* Special digital effect control */
195 #define USAT 0xA7 /* U component saturation control */
196 #define VSAT 0xA8 /* V component saturation control */
197 /* for ov7720 */
198 #define HUE0 0xA9 /* Hue control 0 */
199 #define HUE1 0xAA /* Hue control 1 */
200 /* for ov7725 */
201 #define HUECOS 0xA9 /* Cosine value */
202 #define HUESIN 0xAA /* Sine value */
203
204 #define SIGN 0xAB /* Sign bit for Hue and contrast */
205 #define DSPAUTO 0xAC /* DSP auto function ON/OFF control */
206
207 /*
208 * register detail
209 */
210
211 /* COM2 */
212 #define SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
213 /* Output drive capability */
214 #define OCAP_1x 0x00 /* 1x */
215 #define OCAP_2x 0x01 /* 2x */
216 #define OCAP_3x 0x02 /* 3x */
217 #define OCAP_4x 0x03 /* 4x */
218
219 /* COM3 */
220 #define SWAP_MASK (SWAP_RGB | SWAP_YUV | SWAP_ML)
221 #define IMG_MASK (VFLIP_IMG | HFLIP_IMG)
222
223 #define VFLIP_IMG 0x80 /* Vertical flip image ON/OFF selection */
224 #define HFLIP_IMG 0x40 /* Horizontal mirror image ON/OFF selection */
225 #define SWAP_RGB 0x20 /* Swap B/R output sequence in RGB mode */
226 #define SWAP_YUV 0x10 /* Swap Y/UV output sequence in YUV mode */
227 #define SWAP_ML 0x08 /* Swap output MSB/LSB */
228 /* Tri-state option for output clock */
229 #define NOTRI_CLOCK 0x04 /* 0: Tri-state at this period */
230 /* 1: No tri-state at this period */
231 /* Tri-state option for output data */
232 #define NOTRI_DATA 0x02 /* 0: Tri-state at this period */
233 /* 1: No tri-state at this period */
234 #define SCOLOR_TEST 0x01 /* Sensor color bar test pattern */
235
236 /* COM4 */
237 /* PLL frequency control */
238 #define PLL_BYPASS 0x00 /* 00: Bypass PLL */
239 #define PLL_4x 0x40 /* 01: PLL 4x */
240 #define PLL_6x 0x80 /* 10: PLL 6x */
241 #define PLL_8x 0xc0 /* 11: PLL 8x */
242 /* AEC evaluate window */
243 #define AEC_FULL 0x00 /* 00: Full window */
244 #define AEC_1p2 0x10 /* 01: 1/2 window */
245 #define AEC_1p4 0x20 /* 10: 1/4 window */
246 #define AEC_2p3 0x30 /* 11: Low 2/3 window */
247
248 /* COM5 */
249 #define AFR_ON_OFF 0x80 /* Auto frame rate control ON/OFF selection */
250 #define AFR_SPPED 0x40 /* Auto frame rate control speed slection */
251 /* Auto frame rate max rate control */
252 #define AFR_NO_RATE 0x00 /* No reduction of frame rate */
253 #define AFR_1p2 0x10 /* Max reduction to 1/2 frame rate */
254 #define AFR_1p4 0x20 /* Max reduction to 1/4 frame rate */
255 #define AFR_1p8 0x30 /* Max reduction to 1/8 frame rate */
256 /* Auto frame rate active point control */
257 #define AF_2x 0x00 /* Add frame when AGC reaches 2x gain */
258 #define AF_4x 0x04 /* Add frame when AGC reaches 4x gain */
259 #define AF_8x 0x08 /* Add frame when AGC reaches 8x gain */
260 #define AF_16x 0x0c /* Add frame when AGC reaches 16x gain */
261 /* AEC max step control */
262 #define AEC_NO_LIMIT 0x01 /* 0 : AEC incease step has limit */
263 /* 1 : No limit to AEC increase step */
264
265 /* COM7 */
266 /* SCCB Register Reset */
267 #define SCCB_RESET 0x80 /* 0 : No change */
268 /* 1 : Resets all registers to default */
269 /* Resolution selection */
270 #define SLCT_MASK 0x40 /* Mask of VGA or QVGA */
271 #define SLCT_VGA 0x00 /* 0 : VGA */
272 #define SLCT_QVGA 0x40 /* 1 : QVGA */
273 #define ITU656_ON_OFF 0x20 /* ITU656 protocol ON/OFF selection */
274 /* RGB output format control */
275 #define FMT_MASK 0x0c /* Mask of color format */
276 #define FMT_GBR422 0x00 /* 00 : GBR 4:2:2 */
277 #define FMT_RGB565 0x04 /* 01 : RGB 565 */
278 #define FMT_RGB555 0x08 /* 10 : RGB 555 */
279 #define FMT_RGB444 0x0c /* 11 : RGB 444 */
280 /* Output format control */
281 #define OFMT_MASK 0x03 /* Mask of output format */
282 #define OFMT_YUV 0x00 /* 00 : YUV */
283 #define OFMT_P_BRAW 0x01 /* 01 : Processed Bayer RAW */
284 #define OFMT_RGB 0x02 /* 10 : RGB */
285 #define OFMT_BRAW 0x03 /* 11 : Bayer RAW */
286
287 /* COM8 */
288 #define FAST_ALGO 0x80 /* Enable fast AGC/AEC algorithm */
289 /* AEC Setp size limit */
290 #define UNLMT_STEP 0x40 /* 0 : Step size is limited */
291 /* 1 : Unlimited step size */
292 #define BNDF_ON_OFF 0x20 /* Banding filter ON/OFF */
293 #define AEC_BND 0x10 /* Enable AEC below banding value */
294 #define AEC_ON_OFF 0x08 /* Fine AEC ON/OFF control */
295 #define AGC_ON 0x04 /* AGC Enable */
296 #define AWB_ON 0x02 /* AWB Enable */
297 #define AEC_ON 0x01 /* AEC Enable */
298
299 /* COM9 */
300 #define BASE_AECAGC 0x80 /* Histogram or average based AEC/AGC */
301 /* Automatic gain ceiling - maximum AGC value */
302 #define GAIN_2x 0x00 /* 000 : 2x */
303 #define GAIN_4x 0x10 /* 001 : 4x */
304 #define GAIN_8x 0x20 /* 010 : 8x */
305 #define GAIN_16x 0x30 /* 011 : 16x */
306 #define GAIN_32x 0x40 /* 100 : 32x */
307 #define GAIN_64x 0x50 /* 101 : 64x */
308 #define GAIN_128x 0x60 /* 110 : 128x */
309 #define DROP_VSYNC 0x04 /* Drop VSYNC output of corrupt frame */
310 #define DROP_HREF 0x02 /* Drop HREF output of corrupt frame */
311
312 /* COM11 */
313 #define SGLF_ON_OFF 0x02 /* Single frame ON/OFF selection */
314 #define SGLF_TRIG 0x01 /* Single frame transfer trigger */
315
316 /* EXHCH */
317 #define VSIZE_LSB 0x04 /* Vertical data output size LSB */
318
319 /* DSP_CTRL1 */
320 #define FIFO_ON 0x80 /* FIFO enable/disable selection */
321 #define UV_ON_OFF 0x40 /* UV adjust function ON/OFF selection */
322 #define YUV444_2_422 0x20 /* YUV444 to 422 UV channel option selection */
323 #define CLR_MTRX_ON_OFF 0x10 /* Color matrix ON/OFF selection */
324 #define INTPLT_ON_OFF 0x08 /* Interpolation ON/OFF selection */
325 #define GMM_ON_OFF 0x04 /* Gamma function ON/OFF selection */
326 #define AUTO_BLK_ON_OFF 0x02 /* Black defect auto correction ON/OFF */
327 #define AUTO_WHT_ON_OFF 0x01 /* White define auto correction ON/OFF */
328
329 /* DSP_CTRL3 */
330 #define UV_MASK 0x80 /* UV output sequence option */
331 #define UV_ON 0x80 /* ON */
332 #define UV_OFF 0x00 /* OFF */
333 #define CBAR_MASK 0x20 /* DSP Color bar mask */
334 #define CBAR_ON 0x20 /* ON */
335 #define CBAR_OFF 0x00 /* OFF */
336
337 /* HSTART */
338 #define HST_VGA 0x23
339 #define HST_QVGA 0x3F
340
341 /* HSIZE */
342 #define HSZ_VGA 0xA0
343 #define HSZ_QVGA 0x50
344
345 /* VSTART */
346 #define VST_VGA 0x07
347 #define VST_QVGA 0x03
348
349 /* VSIZE */
350 #define VSZ_VGA 0xF0
351 #define VSZ_QVGA 0x78
352
353 /* HOUTSIZE */
354 #define HOSZ_VGA 0xA0
355 #define HOSZ_QVGA 0x50
356
357 /* VOUTSIZE */
358 #define VOSZ_VGA 0xF0
359 #define VOSZ_QVGA 0x78
360
361 /* DSPAUTO (DSP Auto Function ON/OFF Control) */
362 #define AWB_ACTRL 0x80 /* AWB auto threshold control */
363 #define DENOISE_ACTRL 0x40 /* De-noise auto threshold control */
364 #define EDGE_ACTRL 0x20 /* Edge enhancement auto strength control */
365 #define UV_ACTRL 0x10 /* UV adjust auto slope control */
366 #define SCAL0_ACTRL 0x08 /* Auto scaling factor control */
367 #define SCAL1_2_ACTRL 0x04 /* Auto scaling factor control */
368
369 /*
370 * ID
371 */
372 #define OV7720 0x7720
373 #define OV7725 0x7721
374 #define VERSION(pid, ver) ((pid<<8)|(ver&0xFF))
375
376 /*
377 * struct
378 */
379 struct regval_list {
380 unsigned char reg_num;
381 unsigned char value;
382 };
383
384 struct ov772x_color_format {
385 const struct soc_camera_data_format *format;
386 u8 dsp3;
387 u8 com3;
388 u8 com7;
389 };
390
391 struct ov772x_win_size {
392 char *name;
393 __u32 width;
394 __u32 height;
395 unsigned char com7_bit;
396 const struct regval_list *regs;
397 };
398
399 struct ov772x_priv {
400 struct v4l2_subdev subdev;
401 struct ov772x_camera_info *info;
402 const struct ov772x_color_format *fmt;
403 const struct ov772x_win_size *win;
404 int model;
405 unsigned short flag_vflip:1;
406 unsigned short flag_hflip:1;
407 /* band_filter = COM8[5] ? 256 - BDBASE : 0 */
408 unsigned short band_filter;
409 };
410
411 #define ENDMARKER { 0xff, 0xff }
412
413 /*
414 * register setting for window size
415 */
416 static const struct regval_list ov772x_qvga_regs[] = {
417 { HSTART, HST_QVGA },
418 { HSIZE, HSZ_QVGA },
419 { VSTART, VST_QVGA },
420 { VSIZE, VSZ_QVGA },
421 { HOUTSIZE, HOSZ_QVGA },
422 { VOUTSIZE, VOSZ_QVGA },
423 ENDMARKER,
424 };
425
426 static const struct regval_list ov772x_vga_regs[] = {
427 { HSTART, HST_VGA },
428 { HSIZE, HSZ_VGA },
429 { VSTART, VST_VGA },
430 { VSIZE, VSZ_VGA },
431 { HOUTSIZE, HOSZ_VGA },
432 { VOUTSIZE, VOSZ_VGA },
433 ENDMARKER,
434 };
435
436 /*
437 * supported format list
438 */
439
440 #define SETFOURCC(type) .name = (#type), .fourcc = (V4L2_PIX_FMT_ ## type)
441 static const struct soc_camera_data_format ov772x_fmt_lists[] = {
442 {
443 SETFOURCC(YUYV),
444 .depth = 16,
445 .colorspace = V4L2_COLORSPACE_JPEG,
446 },
447 {
448 SETFOURCC(YVYU),
449 .depth = 16,
450 .colorspace = V4L2_COLORSPACE_JPEG,
451 },
452 {
453 SETFOURCC(UYVY),
454 .depth = 16,
455 .colorspace = V4L2_COLORSPACE_JPEG,
456 },
457 {
458 SETFOURCC(RGB555),
459 .depth = 16,
460 .colorspace = V4L2_COLORSPACE_SRGB,
461 },
462 {
463 SETFOURCC(RGB555X),
464 .depth = 16,
465 .colorspace = V4L2_COLORSPACE_SRGB,
466 },
467 {
468 SETFOURCC(RGB565),
469 .depth = 16,
470 .colorspace = V4L2_COLORSPACE_SRGB,
471 },
472 {
473 SETFOURCC(RGB565X),
474 .depth = 16,
475 .colorspace = V4L2_COLORSPACE_SRGB,
476 },
477 };
478
479 /*
480 * color format list
481 */
482 static const struct ov772x_color_format ov772x_cfmts[] = {
483 {
484 .format = &ov772x_fmt_lists[0],
485 .dsp3 = 0x0,
486 .com3 = SWAP_YUV,
487 .com7 = OFMT_YUV,
488 },
489 {
490 .format = &ov772x_fmt_lists[1],
491 .dsp3 = UV_ON,
492 .com3 = SWAP_YUV,
493 .com7 = OFMT_YUV,
494 },
495 {
496 .format = &ov772x_fmt_lists[2],
497 .dsp3 = 0x0,
498 .com3 = 0x0,
499 .com7 = OFMT_YUV,
500 },
501 {
502 .format = &ov772x_fmt_lists[3],
503 .dsp3 = 0x0,
504 .com3 = SWAP_RGB,
505 .com7 = FMT_RGB555 | OFMT_RGB,
506 },
507 {
508 .format = &ov772x_fmt_lists[4],
509 .dsp3 = 0x0,
510 .com3 = 0x0,
511 .com7 = FMT_RGB555 | OFMT_RGB,
512 },
513 {
514 .format = &ov772x_fmt_lists[5],
515 .dsp3 = 0x0,
516 .com3 = SWAP_RGB,
517 .com7 = FMT_RGB565 | OFMT_RGB,
518 },
519 {
520 .format = &ov772x_fmt_lists[6],
521 .dsp3 = 0x0,
522 .com3 = 0x0,
523 .com7 = FMT_RGB565 | OFMT_RGB,
524 },
525 };
526
527
528 /*
529 * window size list
530 */
531 #define VGA_WIDTH 640
532 #define VGA_HEIGHT 480
533 #define QVGA_WIDTH 320
534 #define QVGA_HEIGHT 240
535 #define MAX_WIDTH VGA_WIDTH
536 #define MAX_HEIGHT VGA_HEIGHT
537
538 static const struct ov772x_win_size ov772x_win_vga = {
539 .name = "VGA",
540 .width = VGA_WIDTH,
541 .height = VGA_HEIGHT,
542 .com7_bit = SLCT_VGA,
543 .regs = ov772x_vga_regs,
544 };
545
546 static const struct ov772x_win_size ov772x_win_qvga = {
547 .name = "QVGA",
548 .width = QVGA_WIDTH,
549 .height = QVGA_HEIGHT,
550 .com7_bit = SLCT_QVGA,
551 .regs = ov772x_qvga_regs,
552 };
553
554 static const struct v4l2_queryctrl ov772x_controls[] = {
555 {
556 .id = V4L2_CID_VFLIP,
557 .type = V4L2_CTRL_TYPE_BOOLEAN,
558 .name = "Flip Vertically",
559 .minimum = 0,
560 .maximum = 1,
561 .step = 1,
562 .default_value = 0,
563 },
564 {
565 .id = V4L2_CID_HFLIP,
566 .type = V4L2_CTRL_TYPE_BOOLEAN,
567 .name = "Flip Horizontally",
568 .minimum = 0,
569 .maximum = 1,
570 .step = 1,
571 .default_value = 0,
572 },
573 {
574 .id = V4L2_CID_BAND_STOP_FILTER,
575 .type = V4L2_CTRL_TYPE_INTEGER,
576 .name = "Band-stop filter",
577 .minimum = 0,
578 .maximum = 256,
579 .step = 1,
580 .default_value = 0,
581 },
582 };
583
584
585 /*
586 * general function
587 */
588
589 static struct ov772x_priv *to_ov772x(const struct i2c_client *client)
590 {
591 return container_of(i2c_get_clientdata(client), struct ov772x_priv,
592 subdev);
593 }
594
595 static int ov772x_write_array(struct i2c_client *client,
596 const struct regval_list *vals)
597 {
598 while (vals->reg_num != 0xff) {
599 int ret = i2c_smbus_write_byte_data(client,
600 vals->reg_num,
601 vals->value);
602 if (ret < 0)
603 return ret;
604 vals++;
605 }
606 return 0;
607 }
608
609 static int ov772x_mask_set(struct i2c_client *client,
610 u8 command,
611 u8 mask,
612 u8 set)
613 {
614 s32 val = i2c_smbus_read_byte_data(client, command);
615 if (val < 0)
616 return val;
617
618 val &= ~mask;
619 val |= set & mask;
620
621 return i2c_smbus_write_byte_data(client, command, val);
622 }
623
624 static int ov772x_reset(struct i2c_client *client)
625 {
626 int ret = i2c_smbus_write_byte_data(client, COM7, SCCB_RESET);
627 msleep(1);
628 return ret;
629 }
630
631 /*
632 * soc_camera_ops function
633 */
634
635 static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
636 {
637 struct i2c_client *client = sd->priv;
638 struct ov772x_priv *priv = to_ov772x(client);
639
640 if (!enable) {
641 ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, SOFT_SLEEP_MODE);
642 return 0;
643 }
644
645 if (!priv->win || !priv->fmt) {
646 dev_err(&client->dev, "norm or win select error\n");
647 return -EPERM;
648 }
649
650 ov772x_mask_set(client, COM2, SOFT_SLEEP_MODE, 0);
651
652 dev_dbg(&client->dev, "format %s, win %s\n",
653 priv->fmt->format->name, priv->win->name);
654
655 return 0;
656 }
657
658 static int ov772x_set_bus_param(struct soc_camera_device *icd,
659 unsigned long flags)
660 {
661 return 0;
662 }
663
664 static unsigned long ov772x_query_bus_param(struct soc_camera_device *icd)
665 {
666 struct i2c_client *client = to_i2c_client(to_soc_camera_control(icd));
667 struct ov772x_priv *priv = i2c_get_clientdata(client);
668 struct soc_camera_link *icl = to_soc_camera_link(icd);
669 unsigned long flags = SOCAM_PCLK_SAMPLE_RISING | SOCAM_MASTER |
670 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_HSYNC_ACTIVE_HIGH |
671 SOCAM_DATA_ACTIVE_HIGH | priv->info->buswidth;
672
673 return soc_camera_apply_sensor_flags(icl, flags);
674 }
675
676 static int ov772x_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
677 {
678 struct i2c_client *client = sd->priv;
679 struct ov772x_priv *priv = to_ov772x(client);
680
681 switch (ctrl->id) {
682 case V4L2_CID_VFLIP:
683 ctrl->value = priv->flag_vflip;
684 break;
685 case V4L2_CID_HFLIP:
686 ctrl->value = priv->flag_hflip;
687 break;
688 case V4L2_CID_BAND_STOP_FILTER:
689 ctrl->value = priv->band_filter;
690 break;
691 }
692 return 0;
693 }
694
695 static int ov772x_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
696 {
697 struct i2c_client *client = sd->priv;
698 struct ov772x_priv *priv = to_ov772x(client);
699 int ret = 0;
700 u8 val;
701
702 switch (ctrl->id) {
703 case V4L2_CID_VFLIP:
704 val = ctrl->value ? VFLIP_IMG : 0x00;
705 priv->flag_vflip = ctrl->value;
706 if (priv->info->flags & OV772X_FLAG_VFLIP)
707 val ^= VFLIP_IMG;
708 ret = ov772x_mask_set(client, COM3, VFLIP_IMG, val);
709 break;
710 case V4L2_CID_HFLIP:
711 val = ctrl->value ? HFLIP_IMG : 0x00;
712 priv->flag_hflip = ctrl->value;
713 if (priv->info->flags & OV772X_FLAG_HFLIP)
714 val ^= HFLIP_IMG;
715 ret = ov772x_mask_set(client, COM3, HFLIP_IMG, val);
716 break;
717 case V4L2_CID_BAND_STOP_FILTER:
718 if ((unsigned)ctrl->value > 256)
719 ctrl->value = 256;
720 if (ctrl->value == priv->band_filter)
721 break;
722 if (!ctrl->value) {
723 /* Switch the filter off, it is on now */
724 ret = ov772x_mask_set(client, BDBASE, 0xff, 0xff);
725 if (!ret)
726 ret = ov772x_mask_set(client, COM8,
727 BNDF_ON_OFF, 0);
728 } else {
729 /* Switch the filter on, set AEC low limit */
730 val = 256 - ctrl->value;
731 ret = ov772x_mask_set(client, COM8,
732 BNDF_ON_OFF, BNDF_ON_OFF);
733 if (!ret)
734 ret = ov772x_mask_set(client, BDBASE,
735 0xff, val);
736 }
737 if (!ret)
738 priv->band_filter = ctrl->value;
739 break;
740 }
741
742 return ret;
743 }
744
745 static int ov772x_g_chip_ident(struct v4l2_subdev *sd,
746 struct v4l2_dbg_chip_ident *id)
747 {
748 struct i2c_client *client = sd->priv;
749 struct ov772x_priv *priv = to_ov772x(client);
750
751 id->ident = priv->model;
752 id->revision = 0;
753
754 return 0;
755 }
756
757 #ifdef CONFIG_VIDEO_ADV_DEBUG
758 static int ov772x_g_register(struct v4l2_subdev *sd,
759 struct v4l2_dbg_register *reg)
760 {
761 struct i2c_client *client = sd->priv;
762 int ret;
763
764 reg->size = 1;
765 if (reg->reg > 0xff)
766 return -EINVAL;
767
768 ret = i2c_smbus_read_byte_data(client, reg->reg);
769 if (ret < 0)
770 return ret;
771
772 reg->val = (__u64)ret;
773
774 return 0;
775 }
776
777 static int ov772x_s_register(struct v4l2_subdev *sd,
778 struct v4l2_dbg_register *reg)
779 {
780 struct i2c_client *client = sd->priv;
781
782 if (reg->reg > 0xff ||
783 reg->val > 0xff)
784 return -EINVAL;
785
786 return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
787 }
788 #endif
789
790 static const struct ov772x_win_size *ov772x_select_win(u32 width, u32 height)
791 {
792 __u32 diff;
793 const struct ov772x_win_size *win;
794
795 /* default is QVGA */
796 diff = abs(width - ov772x_win_qvga.width) +
797 abs(height - ov772x_win_qvga.height);
798 win = &ov772x_win_qvga;
799
800 /* VGA */
801 if (diff >
802 abs(width - ov772x_win_vga.width) +
803 abs(height - ov772x_win_vga.height))
804 win = &ov772x_win_vga;
805
806 return win;
807 }
808
809 static int ov772x_set_params(struct i2c_client *client,
810 u32 *width, u32 *height, u32 pixfmt)
811 {
812 struct ov772x_priv *priv = to_ov772x(client);
813 int ret = -EINVAL;
814 u8 val;
815 int i;
816
817 /*
818 * select format
819 */
820 priv->fmt = NULL;
821 for (i = 0; i < ARRAY_SIZE(ov772x_cfmts); i++) {
822 if (pixfmt == ov772x_cfmts[i].format->fourcc) {
823 priv->fmt = ov772x_cfmts + i;
824 break;
825 }
826 }
827 if (!priv->fmt)
828 goto ov772x_set_fmt_error;
829
830 /*
831 * select win
832 */
833 priv->win = ov772x_select_win(*width, *height);
834
835 /*
836 * reset hardware
837 */
838 ov772x_reset(client);
839
840 /*
841 * Edge Ctrl
842 */
843 if (priv->info->edgectrl.strength & OV772X_MANUAL_EDGE_CTRL) {
844
845 /*
846 * Manual Edge Control Mode
847 *
848 * Edge auto strength bit is set by default.
849 * Remove it when manual mode.
850 */
851
852 ret = ov772x_mask_set(client, DSPAUTO, EDGE_ACTRL, 0x00);
853 if (ret < 0)
854 goto ov772x_set_fmt_error;
855
856 ret = ov772x_mask_set(client,
857 EDGE_TRSHLD, EDGE_THRESHOLD_MASK,
858 priv->info->edgectrl.threshold);
859 if (ret < 0)
860 goto ov772x_set_fmt_error;
861
862 ret = ov772x_mask_set(client,
863 EDGE_STRNGT, EDGE_STRENGTH_MASK,
864 priv->info->edgectrl.strength);
865 if (ret < 0)
866 goto ov772x_set_fmt_error;
867
868 } else if (priv->info->edgectrl.upper > priv->info->edgectrl.lower) {
869 /*
870 * Auto Edge Control Mode
871 *
872 * set upper and lower limit
873 */
874 ret = ov772x_mask_set(client,
875 EDGE_UPPER, EDGE_UPPER_MASK,
876 priv->info->edgectrl.upper);
877 if (ret < 0)
878 goto ov772x_set_fmt_error;
879
880 ret = ov772x_mask_set(client,
881 EDGE_LOWER, EDGE_LOWER_MASK,
882 priv->info->edgectrl.lower);
883 if (ret < 0)
884 goto ov772x_set_fmt_error;
885 }
886
887 /*
888 * set size format
889 */
890 ret = ov772x_write_array(client, priv->win->regs);
891 if (ret < 0)
892 goto ov772x_set_fmt_error;
893
894 /*
895 * set DSP_CTRL3
896 */
897 val = priv->fmt->dsp3;
898 if (val) {
899 ret = ov772x_mask_set(client,
900 DSP_CTRL3, UV_MASK, val);
901 if (ret < 0)
902 goto ov772x_set_fmt_error;
903 }
904
905 /*
906 * set COM3
907 */
908 val = priv->fmt->com3;
909 if (priv->info->flags & OV772X_FLAG_VFLIP)
910 val |= VFLIP_IMG;
911 if (priv->info->flags & OV772X_FLAG_HFLIP)
912 val |= HFLIP_IMG;
913 if (priv->flag_vflip)
914 val ^= VFLIP_IMG;
915 if (priv->flag_hflip)
916 val ^= HFLIP_IMG;
917
918 ret = ov772x_mask_set(client,
919 COM3, SWAP_MASK | IMG_MASK, val);
920 if (ret < 0)
921 goto ov772x_set_fmt_error;
922
923 /*
924 * set COM7
925 */
926 val = priv->win->com7_bit | priv->fmt->com7;
927 ret = ov772x_mask_set(client,
928 COM7, (SLCT_MASK | FMT_MASK | OFMT_MASK),
929 val);
930 if (ret < 0)
931 goto ov772x_set_fmt_error;
932
933 /*
934 * set COM8
935 */
936 if (priv->band_filter) {
937 ret = ov772x_mask_set(client, COM8, BNDF_ON_OFF, 1);
938 if (!ret)
939 ret = ov772x_mask_set(client, BDBASE,
940 0xff, 256 - priv->band_filter);
941 if (ret < 0)
942 goto ov772x_set_fmt_error;
943 }
944
945 *width = priv->win->width;
946 *height = priv->win->height;
947
948 return ret;
949
950 ov772x_set_fmt_error:
951
952 ov772x_reset(client);
953 priv->win = NULL;
954 priv->fmt = NULL;
955
956 return ret;
957 }
958
959 static int ov772x_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
960 {
961 a->c.left = 0;
962 a->c.top = 0;
963 a->c.width = VGA_WIDTH;
964 a->c.height = VGA_HEIGHT;
965 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
966
967 return 0;
968 }
969
970 static int ov772x_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
971 {
972 a->bounds.left = 0;
973 a->bounds.top = 0;
974 a->bounds.width = VGA_WIDTH;
975 a->bounds.height = VGA_HEIGHT;
976 a->defrect = a->bounds;
977 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
978 a->pixelaspect.numerator = 1;
979 a->pixelaspect.denominator = 1;
980
981 return 0;
982 }
983
984 static int ov772x_g_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
985 {
986 struct i2c_client *client = sd->priv;
987 struct ov772x_priv *priv = to_ov772x(client);
988 struct v4l2_pix_format *pix = &f->fmt.pix;
989
990 if (!priv->win || !priv->fmt) {
991 u32 width = VGA_WIDTH, height = VGA_HEIGHT;
992 int ret = ov772x_set_params(client, &width, &height,
993 V4L2_PIX_FMT_YUYV);
994 if (ret < 0)
995 return ret;
996 }
997
998 f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
999
1000 pix->width = priv->win->width;
1001 pix->height = priv->win->height;
1002 pix->pixelformat = priv->fmt->format->fourcc;
1003 pix->colorspace = priv->fmt->format->colorspace;
1004 pix->field = V4L2_FIELD_NONE;
1005
1006 return 0;
1007 }
1008
1009 static int ov772x_s_fmt(struct v4l2_subdev *sd, struct v4l2_format *f)
1010 {
1011 struct i2c_client *client = sd->priv;
1012 struct v4l2_pix_format *pix = &f->fmt.pix;
1013
1014 return ov772x_set_params(client, &pix->width, &pix->height,
1015 pix->pixelformat);
1016 }
1017
1018 static int ov772x_try_fmt(struct v4l2_subdev *sd,
1019 struct v4l2_format *f)
1020 {
1021 struct v4l2_pix_format *pix = &f->fmt.pix;
1022 const struct ov772x_win_size *win;
1023
1024 /*
1025 * select suitable win
1026 */
1027 win = ov772x_select_win(pix->width, pix->height);
1028
1029 pix->width = win->width;
1030 pix->height = win->height;
1031 pix->field = V4L2_FIELD_NONE;
1032
1033 return 0;
1034 }
1035
1036 static int ov772x_video_probe(struct soc_camera_device *icd,
1037 struct i2c_client *client)
1038 {
1039 struct ov772x_priv *priv = to_ov772x(client);
1040 u8 pid, ver;
1041 const char *devname;
1042
1043 /*
1044 * We must have a parent by now. And it cannot be a wrong one.
1045 * So this entire test is completely redundant.
1046 */
1047 if (!icd->dev.parent ||
1048 to_soc_camera_host(icd->dev.parent)->nr != icd->iface)
1049 return -ENODEV;
1050
1051 /*
1052 * ov772x only use 8 or 10 bit bus width
1053 */
1054 if (SOCAM_DATAWIDTH_10 != priv->info->buswidth &&
1055 SOCAM_DATAWIDTH_8 != priv->info->buswidth) {
1056 dev_err(&client->dev, "bus width error\n");
1057 return -ENODEV;
1058 }
1059
1060 icd->formats = ov772x_fmt_lists;
1061 icd->num_formats = ARRAY_SIZE(ov772x_fmt_lists);
1062
1063 /*
1064 * check and show product ID and manufacturer ID
1065 */
1066 pid = i2c_smbus_read_byte_data(client, PID);
1067 ver = i2c_smbus_read_byte_data(client, VER);
1068
1069 switch (VERSION(pid, ver)) {
1070 case OV7720:
1071 devname = "ov7720";
1072 priv->model = V4L2_IDENT_OV7720;
1073 break;
1074 case OV7725:
1075 devname = "ov7725";
1076 priv->model = V4L2_IDENT_OV7725;
1077 break;
1078 default:
1079 dev_err(&client->dev,
1080 "Product ID error %x:%x\n", pid, ver);
1081 return -ENODEV;
1082 }
1083
1084 dev_info(&client->dev,
1085 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
1086 devname,
1087 pid,
1088 ver,
1089 i2c_smbus_read_byte_data(client, MIDH),
1090 i2c_smbus_read_byte_data(client, MIDL));
1091
1092 return 0;
1093 }
1094
1095 static struct soc_camera_ops ov772x_ops = {
1096 .set_bus_param = ov772x_set_bus_param,
1097 .query_bus_param = ov772x_query_bus_param,
1098 .controls = ov772x_controls,
1099 .num_controls = ARRAY_SIZE(ov772x_controls),
1100 };
1101
1102 static struct v4l2_subdev_core_ops ov772x_subdev_core_ops = {
1103 .g_ctrl = ov772x_g_ctrl,
1104 .s_ctrl = ov772x_s_ctrl,
1105 .g_chip_ident = ov772x_g_chip_ident,
1106 #ifdef CONFIG_VIDEO_ADV_DEBUG
1107 .g_register = ov772x_g_register,
1108 .s_register = ov772x_s_register,
1109 #endif
1110 };
1111
1112 static struct v4l2_subdev_video_ops ov772x_subdev_video_ops = {
1113 .s_stream = ov772x_s_stream,
1114 .g_fmt = ov772x_g_fmt,
1115 .s_fmt = ov772x_s_fmt,
1116 .try_fmt = ov772x_try_fmt,
1117 .cropcap = ov772x_cropcap,
1118 .g_crop = ov772x_g_crop,
1119 };
1120
1121 static struct v4l2_subdev_ops ov772x_subdev_ops = {
1122 .core = &ov772x_subdev_core_ops,
1123 .video = &ov772x_subdev_video_ops,
1124 };
1125
1126 /*
1127 * i2c_driver function
1128 */
1129
1130 static int ov772x_probe(struct i2c_client *client,
1131 const struct i2c_device_id *did)
1132 {
1133 struct ov772x_priv *priv;
1134 struct ov772x_camera_info *info;
1135 struct soc_camera_device *icd = client->dev.platform_data;
1136 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1137 struct soc_camera_link *icl;
1138 int ret;
1139
1140 if (!icd) {
1141 dev_err(&client->dev, "OV772X: missing soc-camera data!\n");
1142 return -EINVAL;
1143 }
1144
1145 icl = to_soc_camera_link(icd);
1146 if (!icl)
1147 return -EINVAL;
1148
1149 info = container_of(icl, struct ov772x_camera_info, link);
1150
1151 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1152 dev_err(&adapter->dev,
1153 "I2C-Adapter doesn't support "
1154 "I2C_FUNC_SMBUS_BYTE_DATA\n");
1155 return -EIO;
1156 }
1157
1158 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
1159 if (!priv)
1160 return -ENOMEM;
1161
1162 priv->info = info;
1163
1164 v4l2_i2c_subdev_init(&priv->subdev, client, &ov772x_subdev_ops);
1165
1166 icd->ops = &ov772x_ops;
1167
1168 ret = ov772x_video_probe(icd, client);
1169 if (ret) {
1170 icd->ops = NULL;
1171 i2c_set_clientdata(client, NULL);
1172 kfree(priv);
1173 }
1174
1175 return ret;
1176 }
1177
1178 static int ov772x_remove(struct i2c_client *client)
1179 {
1180 struct ov772x_priv *priv = to_ov772x(client);
1181 struct soc_camera_device *icd = client->dev.platform_data;
1182
1183 icd->ops = NULL;
1184 i2c_set_clientdata(client, NULL);
1185 kfree(priv);
1186 return 0;
1187 }
1188
1189 static const struct i2c_device_id ov772x_id[] = {
1190 { "ov772x", 0 },
1191 { }
1192 };
1193 MODULE_DEVICE_TABLE(i2c, ov772x_id);
1194
1195 static struct i2c_driver ov772x_i2c_driver = {
1196 .driver = {
1197 .name = "ov772x",
1198 },
1199 .probe = ov772x_probe,
1200 .remove = ov772x_remove,
1201 .id_table = ov772x_id,
1202 };
1203
1204 /*
1205 * module function
1206 */
1207
1208 static int __init ov772x_module_init(void)
1209 {
1210 return i2c_add_driver(&ov772x_i2c_driver);
1211 }
1212
1213 static void __exit ov772x_module_exit(void)
1214 {
1215 i2c_del_driver(&ov772x_i2c_driver);
1216 }
1217
1218 module_init(ov772x_module_init);
1219 module_exit(ov772x_module_exit);
1220
1221 MODULE_DESCRIPTION("SoC Camera driver for ov772x");
1222 MODULE_AUTHOR("Kuninori Morimoto");
1223 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support