tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * ov2640 Camera Driver
3 *
4 * Copyright (C) 2010 Alberto Panizzo <maramaopercheseimorto@gmail.com>
5 *
6 * Based on ov772x, ov9640 drivers and previous non merged implementations.
7 *
8 * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
9 * Copyright (C) 2006, OmniVision
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
14 */
15
16#include <linux/init.h>
17#include <linux/module.h>
18#include <linux/i2c.h>
19#include <linux/slab.h>
20#include <linux/delay.h>
21#include <linux/v4l2-mediabus.h>
22#include <linux/videodev2.h>
23
24#include <media/soc_camera.h>
25#include <media/v4l2-chip-ident.h>
26#include <media/v4l2-subdev.h>
27#include <media/v4l2-ctrls.h>
28
29#define VAL_SET(x, mask, rshift, lshift) \
30 ((((x) >> rshift) & mask) << lshift)
31/*
32 * DSP registers
33 * register offset for BANK_SEL == BANK_SEL_DSP
34 */
35#define R_BYPASS 0x05 /* Bypass DSP */
36#define R_BYPASS_DSP_BYPAS 0x01 /* Bypass DSP, sensor out directly */
37#define R_BYPASS_USE_DSP 0x00 /* Use the internal DSP */
38#define QS 0x44 /* Quantization Scale Factor */
39#define CTRLI 0x50
40#define CTRLI_LP_DP 0x80
41#define CTRLI_ROUND 0x40
42#define CTRLI_V_DIV_SET(x) VAL_SET(x, 0x3, 0, 3)
43#define CTRLI_H_DIV_SET(x) VAL_SET(x, 0x3, 0, 0)
44#define HSIZE 0x51 /* H_SIZE[7:0] (real/4) */
45#define HSIZE_SET(x) VAL_SET(x, 0xFF, 2, 0)
46#define VSIZE 0x52 /* V_SIZE[7:0] (real/4) */
47#define VSIZE_SET(x) VAL_SET(x, 0xFF, 2, 0)
48#define XOFFL 0x53 /* OFFSET_X[7:0] */
49#define XOFFL_SET(x) VAL_SET(x, 0xFF, 0, 0)
50#define YOFFL 0x54 /* OFFSET_Y[7:0] */
51#define YOFFL_SET(x) VAL_SET(x, 0xFF, 0, 0)
52#define VHYX 0x55 /* Offset and size completion */
53#define VHYX_VSIZE_SET(x) VAL_SET(x, 0x1, (8+2), 7)
54#define VHYX_HSIZE_SET(x) VAL_SET(x, 0x1, (8+2), 3)
55#define VHYX_YOFF_SET(x) VAL_SET(x, 0x3, 8, 4)
56#define VHYX_XOFF_SET(x) VAL_SET(x, 0x3, 8, 0)
57#define DPRP 0x56
58#define TEST 0x57 /* Horizontal size completion */
59#define TEST_HSIZE_SET(x) VAL_SET(x, 0x1, (9+2), 7)
60#define ZMOW 0x5A /* Zoom: Out Width OUTW[7:0] (real/4) */
61#define ZMOW_OUTW_SET(x) VAL_SET(x, 0xFF, 2, 0)
62#define ZMOH 0x5B /* Zoom: Out Height OUTH[7:0] (real/4) */
63#define ZMOH_OUTH_SET(x) VAL_SET(x, 0xFF, 2, 0)
64#define ZMHH 0x5C /* Zoom: Speed and H&W completion */
65#define ZMHH_ZSPEED_SET(x) VAL_SET(x, 0x0F, 0, 4)
66#define ZMHH_OUTH_SET(x) VAL_SET(x, 0x1, (8+2), 2)
67#define ZMHH_OUTW_SET(x) VAL_SET(x, 0x3, (8+2), 0)
68#define BPADDR 0x7C /* SDE Indirect Register Access: Address */
69#define BPDATA 0x7D /* SDE Indirect Register Access: Data */
70#define CTRL2 0x86 /* DSP Module enable 2 */
71#define CTRL2_DCW_EN 0x20
72#define CTRL2_SDE_EN 0x10
73#define CTRL2_UV_ADJ_EN 0x08
74#define CTRL2_UV_AVG_EN 0x04
75#define CTRL2_CMX_EN 0x01
76#define CTRL3 0x87 /* DSP Module enable 3 */
77#define CTRL3_BPC_EN 0x80
78#define CTRL3_WPC_EN 0x40
79#define SIZEL 0x8C /* Image Size Completion */
80#define SIZEL_HSIZE8_11_SET(x) VAL_SET(x, 0x1, 11, 6)
81#define SIZEL_HSIZE8_SET(x) VAL_SET(x, 0x7, 0, 3)
82#define SIZEL_VSIZE8_SET(x) VAL_SET(x, 0x7, 0, 0)
83#define HSIZE8 0xC0 /* Image Horizontal Size HSIZE[10:3] */
84#define HSIZE8_SET(x) VAL_SET(x, 0xFF, 3, 0)
85#define VSIZE8 0xC1 /* Image Vertical Size VSIZE[10:3] */
86#define VSIZE8_SET(x) VAL_SET(x, 0xFF, 3, 0)
87#define CTRL0 0xC2 /* DSP Module enable 0 */
88#define CTRL0_AEC_EN 0x80
89#define CTRL0_AEC_SEL 0x40
90#define CTRL0_STAT_SEL 0x20
91#define CTRL0_VFIRST 0x10
92#define CTRL0_YUV422 0x08
93#define CTRL0_YUV_EN 0x04
94#define CTRL0_RGB_EN 0x02
95#define CTRL0_RAW_EN 0x01
96#define CTRL1 0xC3 /* DSP Module enable 1 */
97#define CTRL1_CIP 0x80
98#define CTRL1_DMY 0x40
99#define CTRL1_RAW_GMA 0x20
100#define CTRL1_DG 0x10
101#define CTRL1_AWB 0x08
102#define CTRL1_AWB_GAIN 0x04
103#define CTRL1_LENC 0x02
104#define CTRL1_PRE 0x01
105#define R_DVP_SP 0xD3 /* DVP output speed control */
106#define R_DVP_SP_AUTO_MODE 0x80
107#define R_DVP_SP_DVP_MASK 0x3F /* DVP PCLK = sysclk (48)/[6:0] (YUV0);
108 * = sysclk (48)/(2*[6:0]) (RAW);*/
109#define IMAGE_MODE 0xDA /* Image Output Format Select */
110#define IMAGE_MODE_Y8_DVP_EN 0x40
111#define IMAGE_MODE_JPEG_EN 0x10
112#define IMAGE_MODE_YUV422 0x00
113#define IMAGE_MODE_RAW10 0x04 /* (DVP) */
114#define IMAGE_MODE_RGB565 0x08
115#define IMAGE_MODE_HREF_VSYNC 0x02 /* HREF timing select in DVP JPEG output
116 * mode (0 for HREF is same as sensor) */
117#define IMAGE_MODE_LBYTE_FIRST 0x01 /* Byte swap enable for DVP
118 * 1: Low byte first UYVY (C2[4] =0)
119 * VYUY (C2[4] =1)
120 * 0: High byte first YUYV (C2[4]=0)
121 * YVYU (C2[4] = 1) */
122#define RESET 0xE0 /* Reset */
123#define RESET_MICROC 0x40
124#define RESET_SCCB 0x20
125#define RESET_JPEG 0x10
126#define RESET_DVP 0x04
127#define RESET_IPU 0x02
128#define RESET_CIF 0x01
129#define REGED 0xED /* Register ED */
130#define REGED_CLK_OUT_DIS 0x10
131#define MS_SP 0xF0 /* SCCB Master Speed */
132#define SS_ID 0xF7 /* SCCB Slave ID */
133#define SS_CTRL 0xF8 /* SCCB Slave Control */
134#define SS_CTRL_ADD_AUTO_INC 0x20
135#define SS_CTRL_EN 0x08
136#define SS_CTRL_DELAY_CLK 0x04
137#define SS_CTRL_ACC_EN 0x02
138#define SS_CTRL_SEN_PASS_THR 0x01
139#define MC_BIST 0xF9 /* Microcontroller misc register */
140#define MC_BIST_RESET 0x80 /* Microcontroller Reset */
141#define MC_BIST_BOOT_ROM_SEL 0x40
142#define MC_BIST_12KB_SEL 0x20
143#define MC_BIST_12KB_MASK 0x30
144#define MC_BIST_512KB_SEL 0x08
145#define MC_BIST_512KB_MASK 0x0C
146#define MC_BIST_BUSY_BIT_R 0x02
147#define MC_BIST_MC_RES_ONE_SH_W 0x02
148#define MC_BIST_LAUNCH 0x01
149#define BANK_SEL 0xFF /* Register Bank Select */
150#define BANK_SEL_DSP 0x00
151#define BANK_SEL_SENS 0x01
152
153/*
154 * Sensor registers
155 * register offset for BANK_SEL == BANK_SEL_SENS
156 */
157#define GAIN 0x00 /* AGC - Gain control gain setting */
158#define COM1 0x03 /* Common control 1 */
159#define COM1_1_DUMMY_FR 0x40
160#define COM1_3_DUMMY_FR 0x80
161#define COM1_7_DUMMY_FR 0xC0
162#define COM1_VWIN_LSB_UXGA 0x0F
163#define COM1_VWIN_LSB_SVGA 0x0A
164#define COM1_VWIN_LSB_CIF 0x06
165#define REG04 0x04 /* Register 04 */
166#define REG04_DEF 0x20 /* Always set */
167#define REG04_HFLIP_IMG 0x80 /* Horizontal mirror image ON/OFF */
168#define REG04_VFLIP_IMG 0x40 /* Vertical flip image ON/OFF */
169#define REG04_VREF_EN 0x10
170#define REG04_HREF_EN 0x08
171#define REG04_AEC_SET(x) VAL_SET(x, 0x3, 0, 0)
172#define REG08 0x08 /* Frame Exposure One-pin Control Pre-charge Row Num */
173#define COM2 0x09 /* Common control 2 */
174#define COM2_SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
175 /* Output drive capability */
176#define COM2_OCAP_Nx_SET(N) (((N) - 1) & 0x03) /* N = [1x .. 4x] */
177#define PID 0x0A /* Product ID Number MSB */
178#define VER 0x0B /* Product ID Number LSB */
179#define COM3 0x0C /* Common control 3 */
180#define COM3_BAND_50H 0x04 /* 0 For Banding at 60H */
181#define COM3_BAND_AUTO 0x02 /* Auto Banding */
182#define COM3_SING_FR_SNAPSH 0x01 /* 0 For enable live video output after the
183 * snapshot sequence*/
184#define AEC 0x10 /* AEC[9:2] Exposure Value */
185#define CLKRC 0x11 /* Internal clock */
186#define CLKRC_EN 0x80
187#define CLKRC_DIV_SET(x) (((x) - 1) & 0x1F) /* CLK = XVCLK/(x) */
188#define COM7 0x12 /* Common control 7 */
189#define COM7_SRST 0x80 /* Initiates system reset. All registers are
190 * set to factory default values after which
191 * the chip resumes normal operation */
192#define COM7_RES_UXGA 0x00 /* Resolution selectors for UXGA */
193#define COM7_RES_SVGA 0x40 /* SVGA */
194#define COM7_RES_CIF 0x20 /* CIF */
195#define COM7_ZOOM_EN 0x04 /* Enable Zoom mode */
196#define COM7_COLOR_BAR_TEST 0x02 /* Enable Color Bar Test Pattern */
197#define COM8 0x13 /* Common control 8 */
198#define COM8_DEF 0xC0 /* Banding filter ON/OFF */
199#define COM8_BNDF_EN 0x20 /* Banding filter ON/OFF */
200#define COM8_AGC_EN 0x04 /* AGC Auto/Manual control selection */
201#define COM8_AEC_EN 0x01 /* Auto/Manual Exposure control */
202#define COM9 0x14 /* Common control 9
203 * Automatic gain ceiling - maximum AGC value [7:5]*/
204#define COM9_AGC_GAIN_2x 0x00 /* 000 : 2x */
205#define COM9_AGC_GAIN_4x 0x20 /* 001 : 4x */
206#define COM9_AGC_GAIN_8x 0x40 /* 010 : 8x */
207#define COM9_AGC_GAIN_16x 0x60 /* 011 : 16x */
208#define COM9_AGC_GAIN_32x 0x80 /* 100 : 32x */
209#define COM9_AGC_GAIN_64x 0xA0 /* 101 : 64x */
210#define COM9_AGC_GAIN_128x 0xC0 /* 110 : 128x */
211#define COM10 0x15 /* Common control 10 */
212#define COM10_PCLK_HREF 0x20 /* PCLK output qualified by HREF */
213#define COM10_PCLK_RISE 0x10 /* Data is updated at the rising edge of
214 * PCLK (user can latch data at the next
215 * falling edge of PCLK).
216 * 0 otherwise. */
217#define COM10_HREF_INV 0x08 /* Invert HREF polarity:
218 * HREF negative for valid data*/
219#define COM10_VSINC_INV 0x02 /* Invert VSYNC polarity */
220#define HSTART 0x17 /* Horizontal Window start MSB 8 bit */
221#define HEND 0x18 /* Horizontal Window end MSB 8 bit */
222#define VSTART 0x19 /* Vertical Window start MSB 8 bit */
223#define VEND 0x1A /* Vertical Window end MSB 8 bit */
224#define MIDH 0x1C /* Manufacturer ID byte - high */
225#define MIDL 0x1D /* Manufacturer ID byte - low */
226#define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
227#define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
228#define VV 0x26 /* AGC/AEC Fast mode operating region */
229#define VV_HIGH_TH_SET(x) VAL_SET(x, 0xF, 0, 4)
230#define VV_LOW_TH_SET(x) VAL_SET(x, 0xF, 0, 0)
231#define REG2A 0x2A /* Dummy pixel insert MSB */
232#define FRARL 0x2B /* Dummy pixel insert LSB */
233#define ADDVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
234#define ADDVFH 0x2E /* MSB of insert dummy lines in Vertical direction */
235#define YAVG 0x2F /* Y/G Channel Average value */
236#define REG32 0x32 /* Common Control 32 */
237#define REG32_PCLK_DIV_2 0x80 /* PCLK freq divided by 2 */
238#define REG32_PCLK_DIV_4 0xC0 /* PCLK freq divided by 4 */
239#define ARCOM2 0x34 /* Zoom: Horizontal start point */
240#define REG45 0x45 /* Register 45 */
241#define FLL 0x46 /* Frame Length Adjustment LSBs */
242#define FLH 0x47 /* Frame Length Adjustment MSBs */
243#define COM19 0x48 /* Zoom: Vertical start point */
244#define ZOOMS 0x49 /* Zoom: Vertical start point */
245#define COM22 0x4B /* Flash light control */
246#define COM25 0x4E /* For Banding operations */
247#define BD50 0x4F /* 50Hz Banding AEC 8 LSBs */
248#define BD60 0x50 /* 60Hz Banding AEC 8 LSBs */
249#define REG5D 0x5D /* AVGsel[7:0], 16-zone average weight option */
250#define REG5E 0x5E /* AVGsel[15:8], 16-zone average weight option */
251#define REG5F 0x5F /* AVGsel[23:16], 16-zone average weight option */
252#define REG60 0x60 /* AVGsel[31:24], 16-zone average weight option */
253#define HISTO_LOW 0x61 /* Histogram Algorithm Low Level */
254#define HISTO_HIGH 0x62 /* Histogram Algorithm High Level */
255
256/*
257 * ID
258 */
259#define MANUFACTURER_ID 0x7FA2
260#define PID_OV2640 0x2642
261#define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
262
263/*
264 * Struct
265 */
266struct regval_list {
267 u8 reg_num;
268 u8 value;
269};
270
271/* Supported resolutions */
272enum ov2640_width {
273 W_QCIF = 176,
274 W_QVGA = 320,
275 W_CIF = 352,
276 W_VGA = 640,
277 W_SVGA = 800,
278 W_XGA = 1024,
279 W_SXGA = 1280,
280 W_UXGA = 1600,
281};
282
283enum ov2640_height {
284 H_QCIF = 144,
285 H_QVGA = 240,
286 H_CIF = 288,
287 H_VGA = 480,
288 H_SVGA = 600,
289 H_XGA = 768,
290 H_SXGA = 1024,
291 H_UXGA = 1200,
292};
293
294struct ov2640_win_size {
295 char *name;
296 enum ov2640_width width;
297 enum ov2640_height height;
298 const struct regval_list *regs;
299};
300
301
302struct ov2640_priv {
303 struct v4l2_subdev subdev;
304 struct v4l2_ctrl_handler hdl;
305 enum v4l2_mbus_pixelcode cfmt_code;
306 const struct ov2640_win_size *win;
307 int model;
308};
309
310/*
311 * Registers settings
312 */
313
314#define ENDMARKER { 0xff, 0xff }
315
316static const struct regval_list ov2640_init_regs[] = {
317 { BANK_SEL, BANK_SEL_DSP },
318 { 0x2c, 0xff },
319 { 0x2e, 0xdf },
320 { BANK_SEL, BANK_SEL_SENS },
321 { 0x3c, 0x32 },
322 { CLKRC, CLKRC_DIV_SET(1) },
323 { COM2, COM2_OCAP_Nx_SET(3) },
324 { REG04, REG04_DEF | REG04_HREF_EN },
325 { COM8, COM8_DEF | COM8_BNDF_EN | COM8_AGC_EN | COM8_AEC_EN },
326 { COM9, COM9_AGC_GAIN_8x | 0x08},
327 { 0x2c, 0x0c },
328 { 0x33, 0x78 },
329 { 0x3a, 0x33 },
330 { 0x3b, 0xfb },
331 { 0x3e, 0x00 },
332 { 0x43, 0x11 },
333 { 0x16, 0x10 },
334 { 0x39, 0x02 },
335 { 0x35, 0x88 },
336 { 0x22, 0x0a },
337 { 0x37, 0x40 },
338 { 0x23, 0x00 },
339 { ARCOM2, 0xa0 },
340 { 0x06, 0x02 },
341 { 0x06, 0x88 },
342 { 0x07, 0xc0 },
343 { 0x0d, 0xb7 },
344 { 0x0e, 0x01 },
345 { 0x4c, 0x00 },
346 { 0x4a, 0x81 },
347 { 0x21, 0x99 },
348 { AEW, 0x40 },
349 { AEB, 0x38 },
350 { VV, VV_HIGH_TH_SET(0x08) | VV_LOW_TH_SET(0x02) },
351 { 0x5c, 0x00 },
352 { 0x63, 0x00 },
353 { FLL, 0x22 },
354 { COM3, 0x38 | COM3_BAND_AUTO },
355 { REG5D, 0x55 },
356 { REG5E, 0x7d },
357 { REG5F, 0x7d },
358 { REG60, 0x55 },
359 { HISTO_LOW, 0x70 },
360 { HISTO_HIGH, 0x80 },
361 { 0x7c, 0x05 },
362 { 0x20, 0x80 },
363 { 0x28, 0x30 },
364 { 0x6c, 0x00 },
365 { 0x6d, 0x80 },
366 { 0x6e, 0x00 },
367 { 0x70, 0x02 },
368 { 0x71, 0x94 },
369 { 0x73, 0xc1 },
370 { 0x3d, 0x34 },
371 { COM7, COM7_RES_UXGA | COM7_ZOOM_EN },
372 { 0x5a, 0x57 },
373 { BD50, 0xbb },
374 { BD60, 0x9c },
375 { BANK_SEL, BANK_SEL_DSP },
376 { 0xe5, 0x7f },
377 { MC_BIST, MC_BIST_RESET | MC_BIST_BOOT_ROM_SEL },
378 { 0x41, 0x24 },
379 { RESET, RESET_JPEG | RESET_DVP },
380 { 0x76, 0xff },
381 { 0x33, 0xa0 },
382 { 0x42, 0x20 },
383 { 0x43, 0x18 },
384 { 0x4c, 0x00 },
385 { CTRL3, CTRL3_BPC_EN | CTRL3_WPC_EN | 0x10 },
386 { 0x88, 0x3f },
387 { 0xd7, 0x03 },
388 { 0xd9, 0x10 },
389 { R_DVP_SP , R_DVP_SP_AUTO_MODE | 0x2 },
390 { 0xc8, 0x08 },
391 { 0xc9, 0x80 },
392 { BPADDR, 0x00 },
393 { BPDATA, 0x00 },
394 { BPADDR, 0x03 },
395 { BPDATA, 0x48 },
396 { BPDATA, 0x48 },
397 { BPADDR, 0x08 },
398 { BPDATA, 0x20 },
399 { BPDATA, 0x10 },
400 { BPDATA, 0x0e },
401 { 0x90, 0x00 },
402 { 0x91, 0x0e },
403 { 0x91, 0x1a },
404 { 0x91, 0x31 },
405 { 0x91, 0x5a },
406 { 0x91, 0x69 },
407 { 0x91, 0x75 },
408 { 0x91, 0x7e },
409 { 0x91, 0x88 },
410 { 0x91, 0x8f },
411 { 0x91, 0x96 },
412 { 0x91, 0xa3 },
413 { 0x91, 0xaf },
414 { 0x91, 0xc4 },
415 { 0x91, 0xd7 },
416 { 0x91, 0xe8 },
417 { 0x91, 0x20 },
418 { 0x92, 0x00 },
419 { 0x93, 0x06 },
420 { 0x93, 0xe3 },
421 { 0x93, 0x03 },
422 { 0x93, 0x03 },
423 { 0x93, 0x00 },
424 { 0x93, 0x02 },
425 { 0x93, 0x00 },
426 { 0x93, 0x00 },
427 { 0x93, 0x00 },
428 { 0x93, 0x00 },
429 { 0x93, 0x00 },
430 { 0x93, 0x00 },
431 { 0x93, 0x00 },
432 { 0x96, 0x00 },
433 { 0x97, 0x08 },
434 { 0x97, 0x19 },
435 { 0x97, 0x02 },
436 { 0x97, 0x0c },
437 { 0x97, 0x24 },
438 { 0x97, 0x30 },
439 { 0x97, 0x28 },
440 { 0x97, 0x26 },
441 { 0x97, 0x02 },
442 { 0x97, 0x98 },
443 { 0x97, 0x80 },
444 { 0x97, 0x00 },
445 { 0x97, 0x00 },
446 { 0xa4, 0x00 },
447 { 0xa8, 0x00 },
448 { 0xc5, 0x11 },
449 { 0xc6, 0x51 },
450 { 0xbf, 0x80 },
451 { 0xc7, 0x10 },
452 { 0xb6, 0x66 },
453 { 0xb8, 0xA5 },
454 { 0xb7, 0x64 },
455 { 0xb9, 0x7C },
456 { 0xb3, 0xaf },
457 { 0xb4, 0x97 },
458 { 0xb5, 0xFF },
459 { 0xb0, 0xC5 },
460 { 0xb1, 0x94 },
461 { 0xb2, 0x0f },
462 { 0xc4, 0x5c },
463 { 0xa6, 0x00 },
464 { 0xa7, 0x20 },
465 { 0xa7, 0xd8 },
466 { 0xa7, 0x1b },
467 { 0xa7, 0x31 },
468 { 0xa7, 0x00 },
469 { 0xa7, 0x18 },
470 { 0xa7, 0x20 },
471 { 0xa7, 0xd8 },
472 { 0xa7, 0x19 },
473 { 0xa7, 0x31 },
474 { 0xa7, 0x00 },
475 { 0xa7, 0x18 },
476 { 0xa7, 0x20 },
477 { 0xa7, 0xd8 },
478 { 0xa7, 0x19 },
479 { 0xa7, 0x31 },
480 { 0xa7, 0x00 },
481 { 0xa7, 0x18 },
482 { 0x7f, 0x00 },
483 { 0xe5, 0x1f },
484 { 0xe1, 0x77 },
485 { 0xdd, 0x7f },
486 { CTRL0, CTRL0_YUV422 | CTRL0_YUV_EN | CTRL0_RGB_EN },
487 ENDMARKER,
488};
489
490/*
491 * Register settings for window size
492 * The preamble, setup the internal DSP to input an UXGA (1600x1200) image.
493 * Then the different zooming configurations will setup the output image size.
494 */
495static const struct regval_list ov2640_size_change_preamble_regs[] = {
496 { BANK_SEL, BANK_SEL_DSP },
497 { RESET, RESET_DVP },
498 { HSIZE8, HSIZE8_SET(W_UXGA) },
499 { VSIZE8, VSIZE8_SET(H_UXGA) },
500 { CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN |
501 CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN },
502 { HSIZE, HSIZE_SET(W_UXGA) },
503 { VSIZE, VSIZE_SET(H_UXGA) },
504 { XOFFL, XOFFL_SET(0) },
505 { YOFFL, YOFFL_SET(0) },
506 { VHYX, VHYX_HSIZE_SET(W_UXGA) | VHYX_VSIZE_SET(H_UXGA) |
507 VHYX_XOFF_SET(0) | VHYX_YOFF_SET(0)},
508 { TEST, TEST_HSIZE_SET(W_UXGA) },
509 ENDMARKER,
510};
511
512#define PER_SIZE_REG_SEQ(x, y, v_div, h_div, pclk_div) \
513 { CTRLI, CTRLI_LP_DP | CTRLI_V_DIV_SET(v_div) | \
514 CTRLI_H_DIV_SET(h_div)}, \
515 { ZMOW, ZMOW_OUTW_SET(x) }, \
516 { ZMOH, ZMOH_OUTH_SET(y) }, \
517 { ZMHH, ZMHH_OUTW_SET(x) | ZMHH_OUTH_SET(y) }, \
518 { R_DVP_SP, pclk_div }, \
519 { RESET, 0x00}
520
521static const struct regval_list ov2640_qcif_regs[] = {
522 PER_SIZE_REG_SEQ(W_QCIF, H_QCIF, 3, 3, 4),
523 ENDMARKER,
524};
525
526static const struct regval_list ov2640_qvga_regs[] = {
527 PER_SIZE_REG_SEQ(W_QVGA, H_QVGA, 2, 2, 4),
528 ENDMARKER,
529};
530
531static const struct regval_list ov2640_cif_regs[] = {
532 PER_SIZE_REG_SEQ(W_CIF, H_CIF, 2, 2, 8),
533 ENDMARKER,
534};
535
536static const struct regval_list ov2640_vga_regs[] = {
537 PER_SIZE_REG_SEQ(W_VGA, H_VGA, 0, 0, 2),
538 ENDMARKER,
539};
540
541static const struct regval_list ov2640_svga_regs[] = {
542 PER_SIZE_REG_SEQ(W_SVGA, H_SVGA, 1, 1, 2),
543 ENDMARKER,
544};
545
546static const struct regval_list ov2640_xga_regs[] = {
547 PER_SIZE_REG_SEQ(W_XGA, H_XGA, 0, 0, 2),
548 { CTRLI, 0x00},
549 ENDMARKER,
550};
551
552static const struct regval_list ov2640_sxga_regs[] = {
553 PER_SIZE_REG_SEQ(W_SXGA, H_SXGA, 0, 0, 2),
554 { CTRLI, 0x00},
555 { R_DVP_SP, 2 | R_DVP_SP_AUTO_MODE },
556 ENDMARKER,
557};
558
559static const struct regval_list ov2640_uxga_regs[] = {
560 PER_SIZE_REG_SEQ(W_UXGA, H_UXGA, 0, 0, 0),
561 { CTRLI, 0x00},
562 { R_DVP_SP, 0 | R_DVP_SP_AUTO_MODE },
563 ENDMARKER,
564};
565
566#define OV2640_SIZE(n, w, h, r) \
567 {.name = n, .width = w , .height = h, .regs = r }
568
569static const struct ov2640_win_size ov2640_supported_win_sizes[] = {
570 OV2640_SIZE("QCIF", W_QCIF, H_QCIF, ov2640_qcif_regs),
571 OV2640_SIZE("QVGA", W_QVGA, H_QVGA, ov2640_qvga_regs),
572 OV2640_SIZE("CIF", W_CIF, H_CIF, ov2640_cif_regs),
573 OV2640_SIZE("VGA", W_VGA, H_VGA, ov2640_vga_regs),
574 OV2640_SIZE("SVGA", W_SVGA, H_SVGA, ov2640_svga_regs),
575 OV2640_SIZE("XGA", W_XGA, H_XGA, ov2640_xga_regs),
576 OV2640_SIZE("SXGA", W_SXGA, H_SXGA, ov2640_sxga_regs),
577 OV2640_SIZE("UXGA", W_UXGA, H_UXGA, ov2640_uxga_regs),
578};
579
580/*
581 * Register settings for pixel formats
582 */
583static const struct regval_list ov2640_format_change_preamble_regs[] = {
584 { BANK_SEL, BANK_SEL_DSP },
585 { R_BYPASS, R_BYPASS_USE_DSP },
586 ENDMARKER,
587};
588
589static const struct regval_list ov2640_yuv422_regs[] = {
590 { IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_YUV422 },
591 { 0xD7, 0x01 },
592 { 0x33, 0xa0 },
593 { 0xe1, 0x67 },
594 { RESET, 0x00 },
595 { R_BYPASS, R_BYPASS_USE_DSP },
596 ENDMARKER,
597};
598
599static const struct regval_list ov2640_rgb565_regs[] = {
600 { IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_RGB565 },
601 { 0xd7, 0x03 },
602 { RESET, 0x00 },
603 { R_BYPASS, R_BYPASS_USE_DSP },
604 ENDMARKER,
605};
606
607static enum v4l2_mbus_pixelcode ov2640_codes[] = {
608 V4L2_MBUS_FMT_UYVY8_2X8,
609 V4L2_MBUS_FMT_RGB565_2X8_LE,
610};
611
612/*
613 * General functions
614 */
615static struct ov2640_priv *to_ov2640(const struct i2c_client *client)
616{
617 return container_of(i2c_get_clientdata(client), struct ov2640_priv,
618 subdev);
619}
620
621static int ov2640_write_array(struct i2c_client *client,
622 const struct regval_list *vals)
623{
624 int ret;
625
626 while ((vals->reg_num != 0xff) || (vals->value != 0xff)) {
627 ret = i2c_smbus_write_byte_data(client,
628 vals->reg_num, vals->value);
629 dev_vdbg(&client->dev, "array: 0x%02x, 0x%02x",
630 vals->reg_num, vals->value);
631
632 if (ret < 0)
633 return ret;
634 vals++;
635 }
636 return 0;
637}
638
639static int ov2640_mask_set(struct i2c_client *client,
640 u8 reg, u8 mask, u8 set)
641{
642 s32 val = i2c_smbus_read_byte_data(client, reg);
643 if (val < 0)
644 return val;
645
646 val &= ~mask;
647 val |= set & mask;
648
649 dev_vdbg(&client->dev, "masks: 0x%02x, 0x%02x", reg, val);
650
651 return i2c_smbus_write_byte_data(client, reg, val);
652}
653
654static int ov2640_reset(struct i2c_client *client)
655{
656 int ret;
657 const struct regval_list reset_seq[] = {
658 {BANK_SEL, BANK_SEL_SENS},
659 {COM7, COM7_SRST},
660 ENDMARKER,
661 };
662
663 ret = ov2640_write_array(client, reset_seq);
664 if (ret)
665 goto err;
666
667 msleep(5);
668err:
669 dev_dbg(&client->dev, "%s: (ret %d)", __func__, ret);
670 return ret;
671}
672
673/*
674 * soc_camera_ops functions
675 */
676static int ov2640_s_stream(struct v4l2_subdev *sd, int enable)
677{
678 return 0;
679}
680
681static int ov2640_s_ctrl(struct v4l2_ctrl *ctrl)
682{
683 struct v4l2_subdev *sd =
684 &container_of(ctrl->handler, struct ov2640_priv, hdl)->subdev;
685 struct i2c_client *client = v4l2_get_subdevdata(sd);
686 u8 val;
687
688 switch (ctrl->id) {
689 case V4L2_CID_VFLIP:
690 val = ctrl->val ? REG04_VFLIP_IMG : 0x00;
691 return ov2640_mask_set(client, REG04, REG04_VFLIP_IMG, val);
692 case V4L2_CID_HFLIP:
693 val = ctrl->val ? REG04_HFLIP_IMG : 0x00;
694 return ov2640_mask_set(client, REG04, REG04_HFLIP_IMG, val);
695 }
696
697 return -EINVAL;
698}
699
700static int ov2640_g_chip_ident(struct v4l2_subdev *sd,
701 struct v4l2_dbg_chip_ident *id)
702{
703 struct i2c_client *client = v4l2_get_subdevdata(sd);
704 struct ov2640_priv *priv = to_ov2640(client);
705
706 id->ident = priv->model;
707 id->revision = 0;
708
709 return 0;
710}
711
712#ifdef CONFIG_VIDEO_ADV_DEBUG
713static int ov2640_g_register(struct v4l2_subdev *sd,
714 struct v4l2_dbg_register *reg)
715{
716 struct i2c_client *client = v4l2_get_subdevdata(sd);
717 int ret;
718
719 reg->size = 1;
720 if (reg->reg > 0xff)
721 return -EINVAL;
722
723 ret = i2c_smbus_read_byte_data(client, reg->reg);
724 if (ret < 0)
725 return ret;
726
727 reg->val = ret;
728
729 return 0;
730}
731
732static int ov2640_s_register(struct v4l2_subdev *sd,
733 struct v4l2_dbg_register *reg)
734{
735 struct i2c_client *client = v4l2_get_subdevdata(sd);
736
737 if (reg->reg > 0xff ||
738 reg->val > 0xff)
739 return -EINVAL;
740
741 return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
742}
743#endif
744
745/* Select the nearest higher resolution for capture */
746static const struct ov2640_win_size *ov2640_select_win(u32 *width, u32 *height)
747{
748 int i, default_size = ARRAY_SIZE(ov2640_supported_win_sizes) - 1;
749
750 for (i = 0; i < ARRAY_SIZE(ov2640_supported_win_sizes); i++) {
751 if (ov2640_supported_win_sizes[i].width >= *width &&
752 ov2640_supported_win_sizes[i].height >= *height) {
753 *width = ov2640_supported_win_sizes[i].width;
754 *height = ov2640_supported_win_sizes[i].height;
755 return &ov2640_supported_win_sizes[i];
756 }
757 }
758
759 *width = ov2640_supported_win_sizes[default_size].width;
760 *height = ov2640_supported_win_sizes[default_size].height;
761 return &ov2640_supported_win_sizes[default_size];
762}
763
764static int ov2640_set_params(struct i2c_client *client, u32 *width, u32 *height,
765 enum v4l2_mbus_pixelcode code)
766{
767 struct ov2640_priv *priv = to_ov2640(client);
768 const struct regval_list *selected_cfmt_regs;
769 int ret;
770
771 /* select win */
772 priv->win = ov2640_select_win(width, height);
773
774 /* select format */
775 priv->cfmt_code = 0;
776 switch (code) {
777 case V4L2_MBUS_FMT_RGB565_2X8_LE:
778 dev_dbg(&client->dev, "%s: Selected cfmt RGB565", __func__);
779 selected_cfmt_regs = ov2640_rgb565_regs;
780 break;
781 default:
782 case V4L2_MBUS_FMT_UYVY8_2X8:
783 dev_dbg(&client->dev, "%s: Selected cfmt YUV422", __func__);
784 selected_cfmt_regs = ov2640_yuv422_regs;
785 }
786
787 /* reset hardware */
788 ov2640_reset(client);
789
790 /* initialize the sensor with default data */
791 dev_dbg(&client->dev, "%s: Init default", __func__);
792 ret = ov2640_write_array(client, ov2640_init_regs);
793 if (ret < 0)
794 goto err;
795
796 /* select preamble */
797 dev_dbg(&client->dev, "%s: Set size to %s", __func__, priv->win->name);
798 ret = ov2640_write_array(client, ov2640_size_change_preamble_regs);
799 if (ret < 0)
800 goto err;
801
802 /* set size win */
803 ret = ov2640_write_array(client, priv->win->regs);
804 if (ret < 0)
805 goto err;
806
807 /* cfmt preamble */
808 dev_dbg(&client->dev, "%s: Set cfmt", __func__);
809 ret = ov2640_write_array(client, ov2640_format_change_preamble_regs);
810 if (ret < 0)
811 goto err;
812
813 /* set cfmt */
814 ret = ov2640_write_array(client, selected_cfmt_regs);
815 if (ret < 0)
816 goto err;
817
818 priv->cfmt_code = code;
819 *width = priv->win->width;
820 *height = priv->win->height;
821
822 return 0;
823
824err:
825 dev_err(&client->dev, "%s: Error %d", __func__, ret);
826 ov2640_reset(client);
827 priv->win = NULL;
828
829 return ret;
830}
831
832static int ov2640_g_fmt(struct v4l2_subdev *sd,
833 struct v4l2_mbus_framefmt *mf)
834{
835 struct i2c_client *client = v4l2_get_subdevdata(sd);
836 struct ov2640_priv *priv = to_ov2640(client);
837
838 if (!priv->win) {
839 u32 width = W_SVGA, height = H_SVGA;
840 priv->win = ov2640_select_win(&width, &height);
841 priv->cfmt_code = V4L2_MBUS_FMT_UYVY8_2X8;
842 }
843
844 mf->width = priv->win->width;
845 mf->height = priv->win->height;
846 mf->code = priv->cfmt_code;
847
848 switch (mf->code) {
849 case V4L2_MBUS_FMT_RGB565_2X8_LE:
850 mf->colorspace = V4L2_COLORSPACE_SRGB;
851 break;
852 default:
853 case V4L2_MBUS_FMT_UYVY8_2X8:
854 mf->colorspace = V4L2_COLORSPACE_JPEG;
855 }
856 mf->field = V4L2_FIELD_NONE;
857
858 return 0;
859}
860
861static int ov2640_s_fmt(struct v4l2_subdev *sd,
862 struct v4l2_mbus_framefmt *mf)
863{
864 struct i2c_client *client = v4l2_get_subdevdata(sd);
865 int ret;
866
867
868 switch (mf->code) {
869 case V4L2_MBUS_FMT_RGB565_2X8_LE:
870 mf->colorspace = V4L2_COLORSPACE_SRGB;
871 break;
872 default:
873 mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
874 case V4L2_MBUS_FMT_UYVY8_2X8:
875 mf->colorspace = V4L2_COLORSPACE_JPEG;
876 }
877
878 ret = ov2640_set_params(client, &mf->width, &mf->height, mf->code);
879
880 return ret;
881}
882
883static int ov2640_try_fmt(struct v4l2_subdev *sd,
884 struct v4l2_mbus_framefmt *mf)
885{
886 const struct ov2640_win_size *win;
887
888 /*
889 * select suitable win
890 */
891 win = ov2640_select_win(&mf->width, &mf->height);
892
893 mf->field = V4L2_FIELD_NONE;
894
895 switch (mf->code) {
896 case V4L2_MBUS_FMT_RGB565_2X8_LE:
897 mf->colorspace = V4L2_COLORSPACE_SRGB;
898 break;
899 default:
900 mf->code = V4L2_MBUS_FMT_UYVY8_2X8;
901 case V4L2_MBUS_FMT_UYVY8_2X8:
902 mf->colorspace = V4L2_COLORSPACE_JPEG;
903 }
904
905 return 0;
906}
907
908static int ov2640_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
909 enum v4l2_mbus_pixelcode *code)
910{
911 if (index >= ARRAY_SIZE(ov2640_codes))
912 return -EINVAL;
913
914 *code = ov2640_codes[index];
915 return 0;
916}
917
918static int ov2640_g_crop(struct v4l2_subdev *sd, struct v4l2_crop *a)
919{
920 a->c.left = 0;
921 a->c.top = 0;
922 a->c.width = W_UXGA;
923 a->c.height = H_UXGA;
924 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
925
926 return 0;
927}
928
929static int ov2640_cropcap(struct v4l2_subdev *sd, struct v4l2_cropcap *a)
930{
931 a->bounds.left = 0;
932 a->bounds.top = 0;
933 a->bounds.width = W_UXGA;
934 a->bounds.height = H_UXGA;
935 a->defrect = a->bounds;
936 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
937 a->pixelaspect.numerator = 1;
938 a->pixelaspect.denominator = 1;
939
940 return 0;
941}
942
943static int ov2640_video_probe(struct i2c_client *client)
944{
945 struct ov2640_priv *priv = to_ov2640(client);
946 u8 pid, ver, midh, midl;
947 const char *devname;
948 int ret;
949
950 /*
951 * check and show product ID and manufacturer ID
952 */
953 i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
954 pid = i2c_smbus_read_byte_data(client, PID);
955 ver = i2c_smbus_read_byte_data(client, VER);
956 midh = i2c_smbus_read_byte_data(client, MIDH);
957 midl = i2c_smbus_read_byte_data(client, MIDL);
958
959 switch (VERSION(pid, ver)) {
960 case PID_OV2640:
961 devname = "ov2640";
962 priv->model = V4L2_IDENT_OV2640;
963 break;
964 default:
965 dev_err(&client->dev,
966 "Product ID error %x:%x\n", pid, ver);
967 ret = -ENODEV;
968 goto err;
969 }
970
971 dev_info(&client->dev,
972 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
973 devname, pid, ver, midh, midl);
974
975 return v4l2_ctrl_handler_setup(&priv->hdl);
976
977err:
978 return ret;
979}
980
981static const struct v4l2_ctrl_ops ov2640_ctrl_ops = {
982 .s_ctrl = ov2640_s_ctrl,
983};
984
985static struct v4l2_subdev_core_ops ov2640_subdev_core_ops = {
986 .g_chip_ident = ov2640_g_chip_ident,
987#ifdef CONFIG_VIDEO_ADV_DEBUG
988 .g_register = ov2640_g_register,
989 .s_register = ov2640_s_register,
990#endif
991};
992
993static int ov2640_g_mbus_config(struct v4l2_subdev *sd,
994 struct v4l2_mbus_config *cfg)
995{
996 struct i2c_client *client = v4l2_get_subdevdata(sd);
997 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
998
999 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
1000 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
1001 V4L2_MBUS_DATA_ACTIVE_HIGH;
1002 cfg->type = V4L2_MBUS_PARALLEL;
1003 cfg->flags = soc_camera_apply_board_flags(icl, cfg);
1004
1005 return 0;
1006}
1007
1008static struct v4l2_subdev_video_ops ov2640_subdev_video_ops = {
1009 .s_stream = ov2640_s_stream,
1010 .g_mbus_fmt = ov2640_g_fmt,
1011 .s_mbus_fmt = ov2640_s_fmt,
1012 .try_mbus_fmt = ov2640_try_fmt,
1013 .cropcap = ov2640_cropcap,
1014 .g_crop = ov2640_g_crop,
1015 .enum_mbus_fmt = ov2640_enum_fmt,
1016 .g_mbus_config = ov2640_g_mbus_config,
1017};
1018
1019static struct v4l2_subdev_ops ov2640_subdev_ops = {
1020 .core = &ov2640_subdev_core_ops,
1021 .video = &ov2640_subdev_video_ops,
1022};
1023
1024/*
1025 * i2c_driver functions
1026 */
1027static int ov2640_probe(struct i2c_client *client,
1028 const struct i2c_device_id *did)
1029{
1030 struct ov2640_priv *priv;
1031 struct soc_camera_link *icl = soc_camera_i2c_to_link(client);
1032 struct i2c_adapter *adapter = to_i2c_adapter(client->dev.parent);
1033 int ret;
1034
1035 if (!icl) {
1036 dev_err(&adapter->dev,
1037 "OV2640: Missing platform_data for driver\n");
1038 return -EINVAL;
1039 }
1040
1041 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1042 dev_err(&adapter->dev,
1043 "OV2640: I2C-Adapter doesn't support SMBUS\n");
1044 return -EIO;
1045 }
1046
1047 priv = kzalloc(sizeof(struct ov2640_priv), GFP_KERNEL);
1048 if (!priv) {
1049 dev_err(&adapter->dev,
1050 "Failed to allocate memory for private data!\n");
1051 return -ENOMEM;
1052 }
1053
1054 v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops);
1055 v4l2_ctrl_handler_init(&priv->hdl, 2);
1056 v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
1057 V4L2_CID_VFLIP, 0, 1, 1, 0);
1058 v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
1059 V4L2_CID_HFLIP, 0, 1, 1, 0);
1060 priv->subdev.ctrl_handler = &priv->hdl;
1061 if (priv->hdl.error) {
1062 int err = priv->hdl.error;
1063
1064 kfree(priv);
1065 return err;
1066 }
1067
1068 ret = ov2640_video_probe(client);
1069 if (ret) {
1070 v4l2_ctrl_handler_free(&priv->hdl);
1071 kfree(priv);
1072 } else {
1073 dev_info(&adapter->dev, "OV2640 Probed\n");
1074 }
1075
1076 return ret;
1077}
1078
1079static int ov2640_remove(struct i2c_client *client)
1080{
1081 struct ov2640_priv *priv = to_ov2640(client);
1082
1083 v4l2_device_unregister_subdev(&priv->subdev);
1084 v4l2_ctrl_handler_free(&priv->hdl);
1085 kfree(priv);
1086 return 0;
1087}
1088
1089static const struct i2c_device_id ov2640_id[] = {
1090 { "ov2640", 0 },
1091 { }
1092};
1093MODULE_DEVICE_TABLE(i2c, ov2640_id);
1094
1095static struct i2c_driver ov2640_i2c_driver = {
1096 .driver = {
1097 .name = "ov2640",
1098 },
1099 .probe = ov2640_probe,
1100 .remove = ov2640_remove,
1101 .id_table = ov2640_id,
1102};
1103
1104module_i2c_driver(ov2640_i2c_driver);
1105
1106MODULE_DESCRIPTION("SoC Camera driver for Omni Vision 2640 sensor");
1107MODULE_AUTHOR("Alberto Panizzo");
1108MODULE_LICENSE("GPL v2");