1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ov2640 Camera Driver
4 *
5 * Copyright (C) 2010 Alberto Panizzo <maramaopercheseimorto@gmail.com>
6 *
7 * Based on ov772x, ov9640 drivers and previous non merged implementations.
8 *
9 * Copyright 2005-2009 Freescale Semiconductor, Inc. All Rights Reserved.
10 * Copyright (C) 2006, OmniVision
11 */
12
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/i2c.h>
16 #include <linux/clk.h>
17 #include <linux/slab.h>
18 #include <linux/delay.h>
19 #include <linux/gpio/consumer.h>
20 #include <linux/v4l2-mediabus.h>
21 #include <linux/videodev2.h>
22
23 #include <media/v4l2-device.h>
24 #include <media/v4l2-event.h>
25 #include <media/v4l2-subdev.h>
26 #include <media/v4l2-ctrls.h>
27 #include <media/v4l2-image-sizes.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 /* REG 0xC7 (unknown name): affects Auto White Balance (AWB)
106 * AWB_OFF 0x40
107 * AWB_SIMPLE 0x10
108 * AWB_ON 0x00 (Advanced AWB ?) */
109 #define R_DVP_SP 0xD3 /* DVP output speed control */
110 #define R_DVP_SP_AUTO_MODE 0x80
111 #define R_DVP_SP_DVP_MASK 0x3F /* DVP PCLK = sysclk (48)/[6:0] (YUV0);
112 * = sysclk (48)/(2*[6:0]) (RAW);*/
113 #define IMAGE_MODE 0xDA /* Image Output Format Select */
114 #define IMAGE_MODE_Y8_DVP_EN 0x40
115 #define IMAGE_MODE_JPEG_EN 0x10
116 #define IMAGE_MODE_YUV422 0x00
117 #define IMAGE_MODE_RAW10 0x04 /* (DVP) */
118 #define IMAGE_MODE_RGB565 0x08
119 #define IMAGE_MODE_HREF_VSYNC 0x02 /* HREF timing select in DVP JPEG output
120 * mode (0 for HREF is same as sensor) */
121 #define IMAGE_MODE_LBYTE_FIRST 0x01 /* Byte swap enable for DVP
122 * 1: Low byte first UYVY (C2[4] =0)
123 * VYUY (C2[4] =1)
124 * 0: High byte first YUYV (C2[4]=0)
125 * YVYU (C2[4] = 1) */
126 #define RESET 0xE0 /* Reset */
127 #define RESET_MICROC 0x40
128 #define RESET_SCCB 0x20
129 #define RESET_JPEG 0x10
130 #define RESET_DVP 0x04
131 #define RESET_IPU 0x02
132 #define RESET_CIF 0x01
133 #define REGED 0xED /* Register ED */
134 #define REGED_CLK_OUT_DIS 0x10
135 #define MS_SP 0xF0 /* SCCB Master Speed */
136 #define SS_ID 0xF7 /* SCCB Slave ID */
137 #define SS_CTRL 0xF8 /* SCCB Slave Control */
138 #define SS_CTRL_ADD_AUTO_INC 0x20
139 #define SS_CTRL_EN 0x08
140 #define SS_CTRL_DELAY_CLK 0x04
141 #define SS_CTRL_ACC_EN 0x02
142 #define SS_CTRL_SEN_PASS_THR 0x01
143 #define MC_BIST 0xF9 /* Microcontroller misc register */
144 #define MC_BIST_RESET 0x80 /* Microcontroller Reset */
145 #define MC_BIST_BOOT_ROM_SEL 0x40
146 #define MC_BIST_12KB_SEL 0x20
147 #define MC_BIST_12KB_MASK 0x30
148 #define MC_BIST_512KB_SEL 0x08
149 #define MC_BIST_512KB_MASK 0x0C
150 #define MC_BIST_BUSY_BIT_R 0x02
151 #define MC_BIST_MC_RES_ONE_SH_W 0x02
152 #define MC_BIST_LAUNCH 0x01
153 #define BANK_SEL 0xFF /* Register Bank Select */
154 #define BANK_SEL_DSP 0x00
155 #define BANK_SEL_SENS 0x01
156
157 /*
158 * Sensor registers
159 * register offset for BANK_SEL == BANK_SEL_SENS
160 */
161 #define GAIN 0x00 /* AGC - Gain control gain setting */
162 #define COM1 0x03 /* Common control 1 */
163 #define COM1_1_DUMMY_FR 0x40
164 #define COM1_3_DUMMY_FR 0x80
165 #define COM1_7_DUMMY_FR 0xC0
166 #define COM1_VWIN_LSB_UXGA 0x0F
167 #define COM1_VWIN_LSB_SVGA 0x0A
168 #define COM1_VWIN_LSB_CIF 0x06
169 #define REG04 0x04 /* Register 04 */
170 #define REG04_DEF 0x20 /* Always set */
171 #define REG04_HFLIP_IMG 0x80 /* Horizontal mirror image ON/OFF */
172 #define REG04_VFLIP_IMG 0x40 /* Vertical flip image ON/OFF */
173 #define REG04_VREF_EN 0x10
174 #define REG04_HREF_EN 0x08
175 #define REG04_AEC_SET(x) VAL_SET(x, 0x3, 0, 0)
176 #define REG08 0x08 /* Frame Exposure One-pin Control Pre-charge Row Num */
177 #define COM2 0x09 /* Common control 2 */
178 #define COM2_SOFT_SLEEP_MODE 0x10 /* Soft sleep mode */
179 /* Output drive capability */
180 #define COM2_OCAP_Nx_SET(N) (((N) - 1) & 0x03) /* N = [1x .. 4x] */
181 #define PID 0x0A /* Product ID Number MSB */
182 #define VER 0x0B /* Product ID Number LSB */
183 #define COM3 0x0C /* Common control 3 */
184 #define COM3_BAND_50H 0x04 /* 0 For Banding at 60H */
185 #define COM3_BAND_AUTO 0x02 /* Auto Banding */
186 #define COM3_SING_FR_SNAPSH 0x01 /* 0 For enable live video output after the
187 * snapshot sequence*/
188 #define AEC 0x10 /* AEC[9:2] Exposure Value */
189 #define CLKRC 0x11 /* Internal clock */
190 #define CLKRC_EN 0x80
191 #define CLKRC_DIV_SET(x) (((x) - 1) & 0x1F) /* CLK = XVCLK/(x) */
192 #define COM7 0x12 /* Common control 7 */
193 #define COM7_SRST 0x80 /* Initiates system reset. All registers are
194 * set to factory default values after which
195 * the chip resumes normal operation */
196 #define COM7_RES_UXGA 0x00 /* Resolution selectors for UXGA */
197 #define COM7_RES_SVGA 0x40 /* SVGA */
198 #define COM7_RES_CIF 0x20 /* CIF */
199 #define COM7_ZOOM_EN 0x04 /* Enable Zoom mode */
200 #define COM7_COLOR_BAR_TEST 0x02 /* Enable Color Bar Test Pattern */
201 #define COM8 0x13 /* Common control 8 */
202 #define COM8_DEF 0xC0
203 #define COM8_BNDF_EN 0x20 /* Banding filter ON/OFF */
204 #define COM8_AGC_EN 0x04 /* AGC Auto/Manual control selection */
205 #define COM8_AEC_EN 0x01 /* Auto/Manual Exposure control */
206 #define COM9 0x14 /* Common control 9
207 * Automatic gain ceiling - maximum AGC value [7:5]*/
208 #define COM9_AGC_GAIN_2x 0x00 /* 000 : 2x */
209 #define COM9_AGC_GAIN_4x 0x20 /* 001 : 4x */
210 #define COM9_AGC_GAIN_8x 0x40 /* 010 : 8x */
211 #define COM9_AGC_GAIN_16x 0x60 /* 011 : 16x */
212 #define COM9_AGC_GAIN_32x 0x80 /* 100 : 32x */
213 #define COM9_AGC_GAIN_64x 0xA0 /* 101 : 64x */
214 #define COM9_AGC_GAIN_128x 0xC0 /* 110 : 128x */
215 #define COM10 0x15 /* Common control 10 */
216 #define COM10_PCLK_HREF 0x20 /* PCLK output qualified by HREF */
217 #define COM10_PCLK_RISE 0x10 /* Data is updated at the rising edge of
218 * PCLK (user can latch data at the next
219 * falling edge of PCLK).
220 * 0 otherwise. */
221 #define COM10_HREF_INV 0x08 /* Invert HREF polarity:
222 * HREF negative for valid data*/
223 #define COM10_VSINC_INV 0x02 /* Invert VSYNC polarity */
224 #define HSTART 0x17 /* Horizontal Window start MSB 8 bit */
225 #define HEND 0x18 /* Horizontal Window end MSB 8 bit */
226 #define VSTART 0x19 /* Vertical Window start MSB 8 bit */
227 #define VEND 0x1A /* Vertical Window end MSB 8 bit */
228 #define MIDH 0x1C /* Manufacturer ID byte - high */
229 #define MIDL 0x1D /* Manufacturer ID byte - low */
230 #define AEW 0x24 /* AGC/AEC - Stable operating region (upper limit) */
231 #define AEB 0x25 /* AGC/AEC - Stable operating region (lower limit) */
232 #define VV 0x26 /* AGC/AEC Fast mode operating region */
233 #define VV_HIGH_TH_SET(x) VAL_SET(x, 0xF, 0, 4)
234 #define VV_LOW_TH_SET(x) VAL_SET(x, 0xF, 0, 0)
235 #define REG2A 0x2A /* Dummy pixel insert MSB */
236 #define FRARL 0x2B /* Dummy pixel insert LSB */
237 #define ADDVFL 0x2D /* LSB of insert dummy lines in Vertical direction */
238 #define ADDVFH 0x2E /* MSB of insert dummy lines in Vertical direction */
239 #define YAVG 0x2F /* Y/G Channel Average value */
240 #define REG32 0x32 /* Common Control 32 */
241 #define REG32_PCLK_DIV_2 0x80 /* PCLK freq divided by 2 */
242 #define REG32_PCLK_DIV_4 0xC0 /* PCLK freq divided by 4 */
243 #define ARCOM2 0x34 /* Zoom: Horizontal start point */
244 #define REG45 0x45 /* Register 45 */
245 #define FLL 0x46 /* Frame Length Adjustment LSBs */
246 #define FLH 0x47 /* Frame Length Adjustment MSBs */
247 #define COM19 0x48 /* Zoom: Vertical start point */
248 #define ZOOMS 0x49 /* Zoom: Vertical start point */
249 #define COM22 0x4B /* Flash light control */
250 #define COM25 0x4E /* For Banding operations */
251 #define COM25_50HZ_BANDING_AEC_MSBS_MASK 0xC0 /* 50Hz Bd. AEC 2 MSBs */
252 #define COM25_60HZ_BANDING_AEC_MSBS_MASK 0x30 /* 60Hz Bd. AEC 2 MSBs */
253 #define COM25_50HZ_BANDING_AEC_MSBS_SET(x) VAL_SET(x, 0x3, 8, 6)
254 #define COM25_60HZ_BANDING_AEC_MSBS_SET(x) VAL_SET(x, 0x3, 8, 4)
255 #define BD50 0x4F /* 50Hz Banding AEC 8 LSBs */
256 #define BD50_50HZ_BANDING_AEC_LSBS_SET(x) VAL_SET(x, 0xFF, 0, 0)
257 #define BD60 0x50 /* 60Hz Banding AEC 8 LSBs */
258 #define BD60_60HZ_BANDING_AEC_LSBS_SET(x) VAL_SET(x, 0xFF, 0, 0)
259 #define REG5A 0x5A /* 50/60Hz Banding Maximum AEC Step */
260 #define BD50_MAX_AEC_STEP_MASK 0xF0 /* 50Hz Banding Max. AEC Step */
261 #define BD60_MAX_AEC_STEP_MASK 0x0F /* 60Hz Banding Max. AEC Step */
262 #define BD50_MAX_AEC_STEP_SET(x) VAL_SET((x - 1), 0x0F, 0, 4)
263 #define BD60_MAX_AEC_STEP_SET(x) VAL_SET((x - 1), 0x0F, 0, 0)
264 #define REG5D 0x5D /* AVGsel[7:0], 16-zone average weight option */
265 #define REG5E 0x5E /* AVGsel[15:8], 16-zone average weight option */
266 #define REG5F 0x5F /* AVGsel[23:16], 16-zone average weight option */
267 #define REG60 0x60 /* AVGsel[31:24], 16-zone average weight option */
268 #define HISTO_LOW 0x61 /* Histogram Algorithm Low Level */
269 #define HISTO_HIGH 0x62 /* Histogram Algorithm High Level */
270
271 /*
272 * ID
273 */
274 #define MANUFACTURER_ID 0x7FA2
275 #define PID_OV2640 0x2642
276 #define VERSION(pid, ver) ((pid << 8) | (ver & 0xFF))
277
278 /*
279 * Struct
280 */
281 struct regval_list {
282 u8 reg_num;
283 u8 value;
284 };
285
286 struct ov2640_win_size {
287 char *name;
288 u32 width;
289 u32 height;
290 const struct regval_list *regs;
291 };
292
293
294 struct ov2640_priv {
295 struct v4l2_subdev subdev;
296 struct media_pad pad;
297 struct v4l2_ctrl_handler hdl;
298 u32 cfmt_code;
299 struct clk *clk;
300 const struct ov2640_win_size *win;
301
302 struct gpio_desc *resetb_gpio;
303 struct gpio_desc *pwdn_gpio;
304
305 struct mutex lock; /* lock to protect streaming and power_count */
306 bool streaming;
307 int power_count;
308 };
309
310 /*
311 * Registers settings
312 */
313
314 #define ENDMARKER { 0xff, 0xff }
315
316 static 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 { REG5A, BD50_MAX_AEC_STEP_SET(6)
373 | BD60_MAX_AEC_STEP_SET(8) }, /* 0x57 */
374 { COM25, COM25_50HZ_BANDING_AEC_MSBS_SET(0x0bb)
375 | COM25_60HZ_BANDING_AEC_MSBS_SET(0x09c) }, /* 0x00 */
376 { BD50, BD50_50HZ_BANDING_AEC_LSBS_SET(0x0bb) }, /* 0xbb */
377 { BD60, BD60_60HZ_BANDING_AEC_LSBS_SET(0x09c) }, /* 0x9c */
378 { BANK_SEL, BANK_SEL_DSP },
379 { 0xe5, 0x7f },
380 { MC_BIST, MC_BIST_RESET | MC_BIST_BOOT_ROM_SEL },
381 { 0x41, 0x24 },
382 { RESET, RESET_JPEG | RESET_DVP },
383 { 0x76, 0xff },
384 { 0x33, 0xa0 },
385 { 0x42, 0x20 },
386 { 0x43, 0x18 },
387 { 0x4c, 0x00 },
388 { CTRL3, CTRL3_BPC_EN | CTRL3_WPC_EN | 0x10 },
389 { 0x88, 0x3f },
390 { 0xd7, 0x03 },
391 { 0xd9, 0x10 },
392 { R_DVP_SP, R_DVP_SP_AUTO_MODE | 0x2 },
393 { 0xc8, 0x08 },
394 { 0xc9, 0x80 },
395 { BPADDR, 0x00 },
396 { BPDATA, 0x00 },
397 { BPADDR, 0x03 },
398 { BPDATA, 0x48 },
399 { BPDATA, 0x48 },
400 { BPADDR, 0x08 },
401 { BPDATA, 0x20 },
402 { BPDATA, 0x10 },
403 { BPDATA, 0x0e },
404 { 0x90, 0x00 },
405 { 0x91, 0x0e },
406 { 0x91, 0x1a },
407 { 0x91, 0x31 },
408 { 0x91, 0x5a },
409 { 0x91, 0x69 },
410 { 0x91, 0x75 },
411 { 0x91, 0x7e },
412 { 0x91, 0x88 },
413 { 0x91, 0x8f },
414 { 0x91, 0x96 },
415 { 0x91, 0xa3 },
416 { 0x91, 0xaf },
417 { 0x91, 0xc4 },
418 { 0x91, 0xd7 },
419 { 0x91, 0xe8 },
420 { 0x91, 0x20 },
421 { 0x92, 0x00 },
422 { 0x93, 0x06 },
423 { 0x93, 0xe3 },
424 { 0x93, 0x03 },
425 { 0x93, 0x03 },
426 { 0x93, 0x00 },
427 { 0x93, 0x02 },
428 { 0x93, 0x00 },
429 { 0x93, 0x00 },
430 { 0x93, 0x00 },
431 { 0x93, 0x00 },
432 { 0x93, 0x00 },
433 { 0x93, 0x00 },
434 { 0x93, 0x00 },
435 { 0x96, 0x00 },
436 { 0x97, 0x08 },
437 { 0x97, 0x19 },
438 { 0x97, 0x02 },
439 { 0x97, 0x0c },
440 { 0x97, 0x24 },
441 { 0x97, 0x30 },
442 { 0x97, 0x28 },
443 { 0x97, 0x26 },
444 { 0x97, 0x02 },
445 { 0x97, 0x98 },
446 { 0x97, 0x80 },
447 { 0x97, 0x00 },
448 { 0x97, 0x00 },
449 { 0xa4, 0x00 },
450 { 0xa8, 0x00 },
451 { 0xc5, 0x11 },
452 { 0xc6, 0x51 },
453 { 0xbf, 0x80 },
454 { 0xc7, 0x10 }, /* simple AWB */
455 { 0xb6, 0x66 },
456 { 0xb8, 0xA5 },
457 { 0xb7, 0x64 },
458 { 0xb9, 0x7C },
459 { 0xb3, 0xaf },
460 { 0xb4, 0x97 },
461 { 0xb5, 0xFF },
462 { 0xb0, 0xC5 },
463 { 0xb1, 0x94 },
464 { 0xb2, 0x0f },
465 { 0xc4, 0x5c },
466 { 0xa6, 0x00 },
467 { 0xa7, 0x20 },
468 { 0xa7, 0xd8 },
469 { 0xa7, 0x1b },
470 { 0xa7, 0x31 },
471 { 0xa7, 0x00 },
472 { 0xa7, 0x18 },
473 { 0xa7, 0x20 },
474 { 0xa7, 0xd8 },
475 { 0xa7, 0x19 },
476 { 0xa7, 0x31 },
477 { 0xa7, 0x00 },
478 { 0xa7, 0x18 },
479 { 0xa7, 0x20 },
480 { 0xa7, 0xd8 },
481 { 0xa7, 0x19 },
482 { 0xa7, 0x31 },
483 { 0xa7, 0x00 },
484 { 0xa7, 0x18 },
485 { 0x7f, 0x00 },
486 { 0xe5, 0x1f },
487 { 0xe1, 0x77 },
488 { 0xdd, 0x7f },
489 { CTRL0, CTRL0_YUV422 | CTRL0_YUV_EN | CTRL0_RGB_EN },
490 ENDMARKER,
491 };
492
493 /*
494 * Register settings for window size
495 * The preamble, setup the internal DSP to input an UXGA (1600x1200) image.
496 * Then the different zooming configurations will setup the output image size.
497 */
498 static const struct regval_list ov2640_size_change_preamble_regs[] = {
499 { BANK_SEL, BANK_SEL_DSP },
500 { RESET, RESET_DVP },
501 { SIZEL, SIZEL_HSIZE8_11_SET(UXGA_WIDTH) |
502 SIZEL_HSIZE8_SET(UXGA_WIDTH) |
503 SIZEL_VSIZE8_SET(UXGA_HEIGHT) },
504 { HSIZE8, HSIZE8_SET(UXGA_WIDTH) },
505 { VSIZE8, VSIZE8_SET(UXGA_HEIGHT) },
506 { CTRL2, CTRL2_DCW_EN | CTRL2_SDE_EN |
507 CTRL2_UV_AVG_EN | CTRL2_CMX_EN | CTRL2_UV_ADJ_EN },
508 { HSIZE, HSIZE_SET(UXGA_WIDTH) },
509 { VSIZE, VSIZE_SET(UXGA_HEIGHT) },
510 { XOFFL, XOFFL_SET(0) },
511 { YOFFL, YOFFL_SET(0) },
512 { VHYX, VHYX_HSIZE_SET(UXGA_WIDTH) | VHYX_VSIZE_SET(UXGA_HEIGHT) |
513 VHYX_XOFF_SET(0) | VHYX_YOFF_SET(0)},
514 { TEST, TEST_HSIZE_SET(UXGA_WIDTH) },
515 ENDMARKER,
516 };
517
518 #define PER_SIZE_REG_SEQ(x, y, v_div, h_div, pclk_div) \
519 { CTRLI, CTRLI_LP_DP | CTRLI_V_DIV_SET(v_div) | \
520 CTRLI_H_DIV_SET(h_div)}, \
521 { ZMOW, ZMOW_OUTW_SET(x) }, \
522 { ZMOH, ZMOH_OUTH_SET(y) }, \
523 { ZMHH, ZMHH_OUTW_SET(x) | ZMHH_OUTH_SET(y) }, \
524 { R_DVP_SP, pclk_div }, \
525 { RESET, 0x00}
526
527 static const struct regval_list ov2640_qcif_regs[] = {
528 PER_SIZE_REG_SEQ(QCIF_WIDTH, QCIF_HEIGHT, 3, 3, 4),
529 ENDMARKER,
530 };
531
532 static const struct regval_list ov2640_qvga_regs[] = {
533 PER_SIZE_REG_SEQ(QVGA_WIDTH, QVGA_HEIGHT, 2, 2, 4),
534 ENDMARKER,
535 };
536
537 static const struct regval_list ov2640_cif_regs[] = {
538 PER_SIZE_REG_SEQ(CIF_WIDTH, CIF_HEIGHT, 2, 2, 8),
539 ENDMARKER,
540 };
541
542 static const struct regval_list ov2640_vga_regs[] = {
543 PER_SIZE_REG_SEQ(VGA_WIDTH, VGA_HEIGHT, 0, 0, 2),
544 ENDMARKER,
545 };
546
547 static const struct regval_list ov2640_svga_regs[] = {
548 PER_SIZE_REG_SEQ(SVGA_WIDTH, SVGA_HEIGHT, 1, 1, 2),
549 ENDMARKER,
550 };
551
552 static const struct regval_list ov2640_xga_regs[] = {
553 PER_SIZE_REG_SEQ(XGA_WIDTH, XGA_HEIGHT, 0, 0, 2),
554 { CTRLI, 0x00},
555 ENDMARKER,
556 };
557
558 static const struct regval_list ov2640_sxga_regs[] = {
559 PER_SIZE_REG_SEQ(SXGA_WIDTH, SXGA_HEIGHT, 0, 0, 2),
560 { CTRLI, 0x00},
561 { R_DVP_SP, 2 | R_DVP_SP_AUTO_MODE },
562 ENDMARKER,
563 };
564
565 static const struct regval_list ov2640_uxga_regs[] = {
566 PER_SIZE_REG_SEQ(UXGA_WIDTH, UXGA_HEIGHT, 0, 0, 0),
567 { CTRLI, 0x00},
568 { R_DVP_SP, 0 | R_DVP_SP_AUTO_MODE },
569 ENDMARKER,
570 };
571
572 #define OV2640_SIZE(n, w, h, r) \
573 {.name = n, .width = w , .height = h, .regs = r }
574
575 static const struct ov2640_win_size ov2640_supported_win_sizes[] = {
576 OV2640_SIZE("QCIF", QCIF_WIDTH, QCIF_HEIGHT, ov2640_qcif_regs),
577 OV2640_SIZE("QVGA", QVGA_WIDTH, QVGA_HEIGHT, ov2640_qvga_regs),
578 OV2640_SIZE("CIF", CIF_WIDTH, CIF_HEIGHT, ov2640_cif_regs),
579 OV2640_SIZE("VGA", VGA_WIDTH, VGA_HEIGHT, ov2640_vga_regs),
580 OV2640_SIZE("SVGA", SVGA_WIDTH, SVGA_HEIGHT, ov2640_svga_regs),
581 OV2640_SIZE("XGA", XGA_WIDTH, XGA_HEIGHT, ov2640_xga_regs),
582 OV2640_SIZE("SXGA", SXGA_WIDTH, SXGA_HEIGHT, ov2640_sxga_regs),
583 OV2640_SIZE("UXGA", UXGA_WIDTH, UXGA_HEIGHT, ov2640_uxga_regs),
584 };
585
586 /*
587 * Register settings for pixel formats
588 */
589 static const struct regval_list ov2640_format_change_preamble_regs[] = {
590 { BANK_SEL, BANK_SEL_DSP },
591 { R_BYPASS, R_BYPASS_USE_DSP },
592 ENDMARKER,
593 };
594
595 static const struct regval_list ov2640_yuyv_regs[] = {
596 { IMAGE_MODE, IMAGE_MODE_YUV422 },
597 { 0xd7, 0x03 },
598 { 0x33, 0xa0 },
599 { 0xe5, 0x1f },
600 { 0xe1, 0x67 },
601 { RESET, 0x00 },
602 { R_BYPASS, R_BYPASS_USE_DSP },
603 ENDMARKER,
604 };
605
606 static const struct regval_list ov2640_uyvy_regs[] = {
607 { IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_YUV422 },
608 { 0xd7, 0x01 },
609 { 0x33, 0xa0 },
610 { 0xe1, 0x67 },
611 { RESET, 0x00 },
612 { R_BYPASS, R_BYPASS_USE_DSP },
613 ENDMARKER,
614 };
615
616 static const struct regval_list ov2640_rgb565_be_regs[] = {
617 { IMAGE_MODE, IMAGE_MODE_RGB565 },
618 { 0xd7, 0x03 },
619 { RESET, 0x00 },
620 { R_BYPASS, R_BYPASS_USE_DSP },
621 ENDMARKER,
622 };
623
624 static const struct regval_list ov2640_rgb565_le_regs[] = {
625 { IMAGE_MODE, IMAGE_MODE_LBYTE_FIRST | IMAGE_MODE_RGB565 },
626 { 0xd7, 0x03 },
627 { RESET, 0x00 },
628 { R_BYPASS, R_BYPASS_USE_DSP },
629 ENDMARKER,
630 };
631
632 static u32 ov2640_codes[] = {
633 MEDIA_BUS_FMT_YUYV8_2X8,
634 MEDIA_BUS_FMT_UYVY8_2X8,
635 MEDIA_BUS_FMT_YVYU8_2X8,
636 MEDIA_BUS_FMT_VYUY8_2X8,
637 MEDIA_BUS_FMT_RGB565_2X8_BE,
638 MEDIA_BUS_FMT_RGB565_2X8_LE,
639 };
640
641 /*
642 * General functions
643 */
to_ov2640(const struct i2c_client * client)644 static struct ov2640_priv *to_ov2640(const struct i2c_client *client)
645 {
646 return container_of(i2c_get_clientdata(client), struct ov2640_priv,
647 subdev);
648 }
649
ov2640_write_array(struct i2c_client * client,const struct regval_list * vals)650 static int ov2640_write_array(struct i2c_client *client,
651 const struct regval_list *vals)
652 {
653 int ret;
654
655 while ((vals->reg_num != 0xff) || (vals->value != 0xff)) {
656 ret = i2c_smbus_write_byte_data(client,
657 vals->reg_num, vals->value);
658 dev_vdbg(&client->dev, "array: 0x%02x, 0x%02x",
659 vals->reg_num, vals->value);
660
661 if (ret < 0)
662 return ret;
663 vals++;
664 }
665 return 0;
666 }
667
ov2640_mask_set(struct i2c_client * client,u8 reg,u8 mask,u8 set)668 static int ov2640_mask_set(struct i2c_client *client,
669 u8 reg, u8 mask, u8 set)
670 {
671 s32 val = i2c_smbus_read_byte_data(client, reg);
672 if (val < 0)
673 return val;
674
675 val &= ~mask;
676 val |= set & mask;
677
678 dev_vdbg(&client->dev, "masks: 0x%02x, 0x%02x", reg, val);
679
680 return i2c_smbus_write_byte_data(client, reg, val);
681 }
682
ov2640_reset(struct i2c_client * client)683 static int ov2640_reset(struct i2c_client *client)
684 {
685 int ret;
686 static const struct regval_list reset_seq[] = {
687 {BANK_SEL, BANK_SEL_SENS},
688 {COM7, COM7_SRST},
689 ENDMARKER,
690 };
691
692 ret = ov2640_write_array(client, reset_seq);
693 if (ret)
694 goto err;
695
696 msleep(5);
697 err:
698 dev_dbg(&client->dev, "%s: (ret %d)", __func__, ret);
699 return ret;
700 }
701
702 static const char * const ov2640_test_pattern_menu[] = {
703 "Disabled",
704 "Eight Vertical Colour Bars",
705 };
706
707 /*
708 * functions
709 */
ov2640_s_ctrl(struct v4l2_ctrl * ctrl)710 static int ov2640_s_ctrl(struct v4l2_ctrl *ctrl)
711 {
712 struct v4l2_subdev *sd =
713 &container_of(ctrl->handler, struct ov2640_priv, hdl)->subdev;
714 struct i2c_client *client = v4l2_get_subdevdata(sd);
715 struct ov2640_priv *priv = to_ov2640(client);
716 u8 val;
717 int ret;
718
719 /* v4l2_ctrl_lock() locks our own mutex */
720
721 /*
722 * If the device is not powered up by the host driver, do not apply any
723 * controls to H/W at this time. Instead the controls will be restored
724 * when the streaming is started.
725 */
726 if (!priv->power_count)
727 return 0;
728
729 ret = i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
730 if (ret < 0)
731 return ret;
732
733 switch (ctrl->id) {
734 case V4L2_CID_VFLIP:
735 val = ctrl->val ? REG04_VFLIP_IMG | REG04_VREF_EN : 0x00;
736 return ov2640_mask_set(client, REG04,
737 REG04_VFLIP_IMG | REG04_VREF_EN, val);
738 /* NOTE: REG04_VREF_EN: 1 line shift / even/odd line swap */
739 case V4L2_CID_HFLIP:
740 val = ctrl->val ? REG04_HFLIP_IMG : 0x00;
741 return ov2640_mask_set(client, REG04, REG04_HFLIP_IMG, val);
742 case V4L2_CID_TEST_PATTERN:
743 val = ctrl->val ? COM7_COLOR_BAR_TEST : 0x00;
744 return ov2640_mask_set(client, COM7, COM7_COLOR_BAR_TEST, val);
745 }
746
747 return -EINVAL;
748 }
749
750 #ifdef CONFIG_VIDEO_ADV_DEBUG
ov2640_g_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)751 static int ov2640_g_register(struct v4l2_subdev *sd,
752 struct v4l2_dbg_register *reg)
753 {
754 struct i2c_client *client = v4l2_get_subdevdata(sd);
755 int ret;
756
757 reg->size = 1;
758 if (reg->reg > 0xff)
759 return -EINVAL;
760
761 ret = i2c_smbus_read_byte_data(client, reg->reg);
762 if (ret < 0)
763 return ret;
764
765 reg->val = ret;
766
767 return 0;
768 }
769
ov2640_s_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)770 static int ov2640_s_register(struct v4l2_subdev *sd,
771 const struct v4l2_dbg_register *reg)
772 {
773 struct i2c_client *client = v4l2_get_subdevdata(sd);
774
775 if (reg->reg > 0xff ||
776 reg->val > 0xff)
777 return -EINVAL;
778
779 return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
780 }
781 #endif
782
ov2640_set_power(struct ov2640_priv * priv,int on)783 static void ov2640_set_power(struct ov2640_priv *priv, int on)
784 {
785 #ifdef CONFIG_GPIOLIB
786 if (priv->pwdn_gpio)
787 gpiod_direction_output(priv->pwdn_gpio, !on);
788 if (on && priv->resetb_gpio) {
789 /* Active the resetb pin to perform a reset pulse */
790 gpiod_direction_output(priv->resetb_gpio, 1);
791 usleep_range(3000, 5000);
792 gpiod_set_value(priv->resetb_gpio, 0);
793 }
794 #endif
795 }
796
ov2640_s_power(struct v4l2_subdev * sd,int on)797 static int ov2640_s_power(struct v4l2_subdev *sd, int on)
798 {
799 struct i2c_client *client = v4l2_get_subdevdata(sd);
800 struct ov2640_priv *priv = to_ov2640(client);
801
802 mutex_lock(&priv->lock);
803
804 /*
805 * If the power count is modified from 0 to != 0 or from != 0 to 0,
806 * update the power state.
807 */
808 if (priv->power_count == !on)
809 ov2640_set_power(priv, on);
810 priv->power_count += on ? 1 : -1;
811 WARN_ON(priv->power_count < 0);
812 mutex_unlock(&priv->lock);
813
814 return 0;
815 }
816
817 /* Select the nearest higher resolution for capture */
ov2640_select_win(u32 width,u32 height)818 static const struct ov2640_win_size *ov2640_select_win(u32 width, u32 height)
819 {
820 int i, default_size = ARRAY_SIZE(ov2640_supported_win_sizes) - 1;
821
822 for (i = 0; i < ARRAY_SIZE(ov2640_supported_win_sizes); i++) {
823 if (ov2640_supported_win_sizes[i].width >= width &&
824 ov2640_supported_win_sizes[i].height >= height)
825 return &ov2640_supported_win_sizes[i];
826 }
827
828 return &ov2640_supported_win_sizes[default_size];
829 }
830
ov2640_set_params(struct i2c_client * client,const struct ov2640_win_size * win,u32 code)831 static int ov2640_set_params(struct i2c_client *client,
832 const struct ov2640_win_size *win, u32 code)
833 {
834 const struct regval_list *selected_cfmt_regs;
835 u8 val;
836 int ret;
837
838 switch (code) {
839 case MEDIA_BUS_FMT_RGB565_2X8_BE:
840 dev_dbg(&client->dev, "%s: Selected cfmt RGB565 BE", __func__);
841 selected_cfmt_regs = ov2640_rgb565_be_regs;
842 break;
843 case MEDIA_BUS_FMT_RGB565_2X8_LE:
844 dev_dbg(&client->dev, "%s: Selected cfmt RGB565 LE", __func__);
845 selected_cfmt_regs = ov2640_rgb565_le_regs;
846 break;
847 case MEDIA_BUS_FMT_YUYV8_2X8:
848 dev_dbg(&client->dev, "%s: Selected cfmt YUYV (YUV422)", __func__);
849 selected_cfmt_regs = ov2640_yuyv_regs;
850 break;
851 case MEDIA_BUS_FMT_UYVY8_2X8:
852 default:
853 dev_dbg(&client->dev, "%s: Selected cfmt UYVY", __func__);
854 selected_cfmt_regs = ov2640_uyvy_regs;
855 break;
856 case MEDIA_BUS_FMT_YVYU8_2X8:
857 dev_dbg(&client->dev, "%s: Selected cfmt YVYU", __func__);
858 selected_cfmt_regs = ov2640_yuyv_regs;
859 break;
860 case MEDIA_BUS_FMT_VYUY8_2X8:
861 dev_dbg(&client->dev, "%s: Selected cfmt VYUY", __func__);
862 selected_cfmt_regs = ov2640_uyvy_regs;
863 break;
864 }
865
866 /* reset hardware */
867 ov2640_reset(client);
868
869 /* initialize the sensor with default data */
870 dev_dbg(&client->dev, "%s: Init default", __func__);
871 ret = ov2640_write_array(client, ov2640_init_regs);
872 if (ret < 0)
873 goto err;
874
875 /* select preamble */
876 dev_dbg(&client->dev, "%s: Set size to %s", __func__, win->name);
877 ret = ov2640_write_array(client, ov2640_size_change_preamble_regs);
878 if (ret < 0)
879 goto err;
880
881 /* set size win */
882 ret = ov2640_write_array(client, win->regs);
883 if (ret < 0)
884 goto err;
885
886 /* cfmt preamble */
887 dev_dbg(&client->dev, "%s: Set cfmt", __func__);
888 ret = ov2640_write_array(client, ov2640_format_change_preamble_regs);
889 if (ret < 0)
890 goto err;
891
892 /* set cfmt */
893 ret = ov2640_write_array(client, selected_cfmt_regs);
894 if (ret < 0)
895 goto err;
896 val = (code == MEDIA_BUS_FMT_YVYU8_2X8)
897 || (code == MEDIA_BUS_FMT_VYUY8_2X8) ? CTRL0_VFIRST : 0x00;
898 ret = ov2640_mask_set(client, CTRL0, CTRL0_VFIRST, val);
899 if (ret < 0)
900 goto err;
901
902 return 0;
903
904 err:
905 dev_err(&client->dev, "%s: Error %d", __func__, ret);
906 ov2640_reset(client);
907
908 return ret;
909 }
910
ov2640_get_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)911 static int ov2640_get_fmt(struct v4l2_subdev *sd,
912 struct v4l2_subdev_state *sd_state,
913 struct v4l2_subdev_format *format)
914 {
915 struct v4l2_mbus_framefmt *mf = &format->format;
916 struct i2c_client *client = v4l2_get_subdevdata(sd);
917 struct ov2640_priv *priv = to_ov2640(client);
918
919 if (format->pad)
920 return -EINVAL;
921
922 if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
923 mf = v4l2_subdev_state_get_format(sd_state, 0);
924 format->format = *mf;
925 return 0;
926 }
927
928 mf->width = priv->win->width;
929 mf->height = priv->win->height;
930 mf->code = priv->cfmt_code;
931 mf->colorspace = V4L2_COLORSPACE_SRGB;
932 mf->field = V4L2_FIELD_NONE;
933 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
934 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
935 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
936
937 return 0;
938 }
939
ov2640_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_format * format)940 static int ov2640_set_fmt(struct v4l2_subdev *sd,
941 struct v4l2_subdev_state *sd_state,
942 struct v4l2_subdev_format *format)
943 {
944 struct v4l2_mbus_framefmt *mf = &format->format;
945 struct i2c_client *client = v4l2_get_subdevdata(sd);
946 struct ov2640_priv *priv = to_ov2640(client);
947 const struct ov2640_win_size *win;
948 int ret = 0;
949
950 if (format->pad)
951 return -EINVAL;
952
953 mutex_lock(&priv->lock);
954
955 /* select suitable win */
956 win = ov2640_select_win(mf->width, mf->height);
957 mf->width = win->width;
958 mf->height = win->height;
959
960 mf->field = V4L2_FIELD_NONE;
961 mf->colorspace = V4L2_COLORSPACE_SRGB;
962 mf->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
963 mf->quantization = V4L2_QUANTIZATION_DEFAULT;
964 mf->xfer_func = V4L2_XFER_FUNC_DEFAULT;
965
966 switch (mf->code) {
967 case MEDIA_BUS_FMT_RGB565_2X8_BE:
968 case MEDIA_BUS_FMT_RGB565_2X8_LE:
969 case MEDIA_BUS_FMT_YUYV8_2X8:
970 case MEDIA_BUS_FMT_UYVY8_2X8:
971 case MEDIA_BUS_FMT_YVYU8_2X8:
972 case MEDIA_BUS_FMT_VYUY8_2X8:
973 break;
974 default:
975 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
976 break;
977 }
978
979 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE) {
980 struct ov2640_priv *priv = to_ov2640(client);
981
982 if (priv->streaming) {
983 ret = -EBUSY;
984 goto out;
985 }
986 /* select win */
987 priv->win = win;
988 /* select format */
989 priv->cfmt_code = mf->code;
990 } else {
991 *v4l2_subdev_state_get_format(sd_state, 0) = *mf;
992 }
993 out:
994 mutex_unlock(&priv->lock);
995
996 return ret;
997 }
998
ov2640_init_state(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state)999 static int ov2640_init_state(struct v4l2_subdev *sd,
1000 struct v4l2_subdev_state *sd_state)
1001 {
1002 struct v4l2_mbus_framefmt *try_fmt =
1003 v4l2_subdev_state_get_format(sd_state, 0);
1004 const struct ov2640_win_size *win =
1005 ov2640_select_win(SVGA_WIDTH, SVGA_HEIGHT);
1006
1007 try_fmt->width = win->width;
1008 try_fmt->height = win->height;
1009 try_fmt->code = MEDIA_BUS_FMT_UYVY8_2X8;
1010 try_fmt->colorspace = V4L2_COLORSPACE_SRGB;
1011 try_fmt->field = V4L2_FIELD_NONE;
1012 try_fmt->ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT;
1013 try_fmt->quantization = V4L2_QUANTIZATION_DEFAULT;
1014 try_fmt->xfer_func = V4L2_XFER_FUNC_DEFAULT;
1015
1016 return 0;
1017 }
1018
ov2640_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_mbus_code_enum * code)1019 static int ov2640_enum_mbus_code(struct v4l2_subdev *sd,
1020 struct v4l2_subdev_state *sd_state,
1021 struct v4l2_subdev_mbus_code_enum *code)
1022 {
1023 if (code->pad || code->index >= ARRAY_SIZE(ov2640_codes))
1024 return -EINVAL;
1025
1026 code->code = ov2640_codes[code->index];
1027 return 0;
1028 }
1029
ov2640_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_state * sd_state,struct v4l2_subdev_selection * sel)1030 static int ov2640_get_selection(struct v4l2_subdev *sd,
1031 struct v4l2_subdev_state *sd_state,
1032 struct v4l2_subdev_selection *sel)
1033 {
1034 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
1035 return -EINVAL;
1036
1037 switch (sel->target) {
1038 case V4L2_SEL_TGT_CROP_BOUNDS:
1039 case V4L2_SEL_TGT_CROP:
1040 sel->r.left = 0;
1041 sel->r.top = 0;
1042 sel->r.width = UXGA_WIDTH;
1043 sel->r.height = UXGA_HEIGHT;
1044 return 0;
1045 default:
1046 return -EINVAL;
1047 }
1048 }
1049
ov2640_s_stream(struct v4l2_subdev * sd,int on)1050 static int ov2640_s_stream(struct v4l2_subdev *sd, int on)
1051 {
1052 struct i2c_client *client = v4l2_get_subdevdata(sd);
1053 struct ov2640_priv *priv = to_ov2640(client);
1054 int ret = 0;
1055
1056 mutex_lock(&priv->lock);
1057 if (priv->streaming == !on) {
1058 if (on) {
1059 ret = ov2640_set_params(client, priv->win,
1060 priv->cfmt_code);
1061 if (!ret)
1062 ret = __v4l2_ctrl_handler_setup(&priv->hdl);
1063 }
1064 }
1065 if (!ret)
1066 priv->streaming = on;
1067 mutex_unlock(&priv->lock);
1068
1069 return ret;
1070 }
1071
ov2640_video_probe(struct i2c_client * client)1072 static int ov2640_video_probe(struct i2c_client *client)
1073 {
1074 struct ov2640_priv *priv = to_ov2640(client);
1075 u8 pid, ver, midh, midl;
1076 const char *devname;
1077 int ret;
1078
1079 ret = ov2640_s_power(&priv->subdev, 1);
1080 if (ret < 0)
1081 return ret;
1082
1083 /*
1084 * check and show product ID and manufacturer ID
1085 */
1086 i2c_smbus_write_byte_data(client, BANK_SEL, BANK_SEL_SENS);
1087 pid = i2c_smbus_read_byte_data(client, PID);
1088 ver = i2c_smbus_read_byte_data(client, VER);
1089 midh = i2c_smbus_read_byte_data(client, MIDH);
1090 midl = i2c_smbus_read_byte_data(client, MIDL);
1091
1092 switch (VERSION(pid, ver)) {
1093 case PID_OV2640:
1094 devname = "ov2640";
1095 break;
1096 default:
1097 dev_err(&client->dev,
1098 "Product ID error %x:%x\n", pid, ver);
1099 ret = -ENODEV;
1100 goto done;
1101 }
1102
1103 dev_info(&client->dev,
1104 "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
1105 devname, pid, ver, midh, midl);
1106
1107 done:
1108 ov2640_s_power(&priv->subdev, 0);
1109 return ret;
1110 }
1111
1112 static const struct v4l2_ctrl_ops ov2640_ctrl_ops = {
1113 .s_ctrl = ov2640_s_ctrl,
1114 };
1115
1116 static const struct v4l2_subdev_core_ops ov2640_subdev_core_ops = {
1117 .log_status = v4l2_ctrl_subdev_log_status,
1118 .subscribe_event = v4l2_ctrl_subdev_subscribe_event,
1119 .unsubscribe_event = v4l2_event_subdev_unsubscribe,
1120 #ifdef CONFIG_VIDEO_ADV_DEBUG
1121 .g_register = ov2640_g_register,
1122 .s_register = ov2640_s_register,
1123 #endif
1124 .s_power = ov2640_s_power,
1125 };
1126
1127 static const struct v4l2_subdev_pad_ops ov2640_subdev_pad_ops = {
1128 .enum_mbus_code = ov2640_enum_mbus_code,
1129 .get_selection = ov2640_get_selection,
1130 .get_fmt = ov2640_get_fmt,
1131 .set_fmt = ov2640_set_fmt,
1132 };
1133
1134 static const struct v4l2_subdev_video_ops ov2640_subdev_video_ops = {
1135 .s_stream = ov2640_s_stream,
1136 };
1137
1138 static const struct v4l2_subdev_ops ov2640_subdev_ops = {
1139 .core = &ov2640_subdev_core_ops,
1140 .pad = &ov2640_subdev_pad_ops,
1141 .video = &ov2640_subdev_video_ops,
1142 };
1143
1144 static const struct v4l2_subdev_internal_ops ov2640_internal_ops = {
1145 .init_state = ov2640_init_state,
1146 };
1147
ov2640_probe_dt(struct i2c_client * client,struct ov2640_priv * priv)1148 static int ov2640_probe_dt(struct i2c_client *client,
1149 struct ov2640_priv *priv)
1150 {
1151 int ret;
1152
1153 /* Request the reset GPIO deasserted */
1154 priv->resetb_gpio = devm_gpiod_get_optional(&client->dev, "resetb",
1155 GPIOD_OUT_LOW);
1156
1157 if (!priv->resetb_gpio)
1158 dev_dbg(&client->dev, "resetb gpio is not assigned!\n");
1159
1160 ret = PTR_ERR_OR_ZERO(priv->resetb_gpio);
1161 if (ret && ret != -ENOSYS) {
1162 dev_dbg(&client->dev,
1163 "Error %d while getting resetb gpio\n", ret);
1164 return ret;
1165 }
1166
1167 /* Request the power down GPIO asserted */
1168 priv->pwdn_gpio = devm_gpiod_get_optional(&client->dev, "pwdn",
1169 GPIOD_OUT_HIGH);
1170
1171 if (!priv->pwdn_gpio)
1172 dev_dbg(&client->dev, "pwdn gpio is not assigned!\n");
1173
1174 ret = PTR_ERR_OR_ZERO(priv->pwdn_gpio);
1175 if (ret && ret != -ENOSYS) {
1176 dev_dbg(&client->dev,
1177 "Error %d while getting pwdn gpio\n", ret);
1178 return ret;
1179 }
1180
1181 return 0;
1182 }
1183
1184 /*
1185 * i2c_driver functions
1186 */
ov2640_probe(struct i2c_client * client)1187 static int ov2640_probe(struct i2c_client *client)
1188 {
1189 struct ov2640_priv *priv;
1190 struct i2c_adapter *adapter = client->adapter;
1191 int ret;
1192
1193 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
1194 dev_err(&adapter->dev,
1195 "OV2640: I2C-Adapter doesn't support SMBUS\n");
1196 return -EIO;
1197 }
1198
1199 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
1200 if (!priv)
1201 return -ENOMEM;
1202
1203 if (client->dev.of_node) {
1204 priv->clk = devm_clk_get_enabled(&client->dev, "xvclk");
1205 if (IS_ERR(priv->clk))
1206 return PTR_ERR(priv->clk);
1207 }
1208
1209 ret = ov2640_probe_dt(client, priv);
1210 if (ret)
1211 return ret;
1212
1213 priv->win = ov2640_select_win(SVGA_WIDTH, SVGA_HEIGHT);
1214 priv->cfmt_code = MEDIA_BUS_FMT_UYVY8_2X8;
1215
1216 v4l2_i2c_subdev_init(&priv->subdev, client, &ov2640_subdev_ops);
1217 priv->subdev.internal_ops = &ov2640_internal_ops;
1218 priv->subdev.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE |
1219 V4L2_SUBDEV_FL_HAS_EVENTS;
1220 mutex_init(&priv->lock);
1221 v4l2_ctrl_handler_init(&priv->hdl, 3);
1222 priv->hdl.lock = &priv->lock;
1223 v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
1224 V4L2_CID_VFLIP, 0, 1, 1, 0);
1225 v4l2_ctrl_new_std(&priv->hdl, &ov2640_ctrl_ops,
1226 V4L2_CID_HFLIP, 0, 1, 1, 0);
1227 v4l2_ctrl_new_std_menu_items(&priv->hdl, &ov2640_ctrl_ops,
1228 V4L2_CID_TEST_PATTERN,
1229 ARRAY_SIZE(ov2640_test_pattern_menu) - 1, 0, 0,
1230 ov2640_test_pattern_menu);
1231 priv->subdev.ctrl_handler = &priv->hdl;
1232 if (priv->hdl.error) {
1233 ret = priv->hdl.error;
1234 goto err_hdl;
1235 }
1236 priv->pad.flags = MEDIA_PAD_FL_SOURCE;
1237 priv->subdev.entity.function = MEDIA_ENT_F_CAM_SENSOR;
1238 ret = media_entity_pads_init(&priv->subdev.entity, 1, &priv->pad);
1239 if (ret < 0)
1240 goto err_hdl;
1241
1242 ret = ov2640_video_probe(client);
1243 if (ret < 0)
1244 goto err_videoprobe;
1245
1246 ret = v4l2_async_register_subdev(&priv->subdev);
1247 if (ret < 0)
1248 goto err_videoprobe;
1249
1250 dev_info(&adapter->dev, "OV2640 Probed\n");
1251
1252 return 0;
1253
1254 err_videoprobe:
1255 media_entity_cleanup(&priv->subdev.entity);
1256 err_hdl:
1257 v4l2_ctrl_handler_free(&priv->hdl);
1258 mutex_destroy(&priv->lock);
1259 return ret;
1260 }
1261
ov2640_remove(struct i2c_client * client)1262 static void ov2640_remove(struct i2c_client *client)
1263 {
1264 struct ov2640_priv *priv = to_ov2640(client);
1265
1266 v4l2_async_unregister_subdev(&priv->subdev);
1267 v4l2_ctrl_handler_free(&priv->hdl);
1268 mutex_destroy(&priv->lock);
1269 media_entity_cleanup(&priv->subdev.entity);
1270 v4l2_device_unregister_subdev(&priv->subdev);
1271 }
1272
1273 static const struct i2c_device_id ov2640_id[] = {
1274 { "ov2640" },
1275 { }
1276 };
1277 MODULE_DEVICE_TABLE(i2c, ov2640_id);
1278
1279 static const struct of_device_id ov2640_of_match[] = {
1280 {.compatible = "ovti,ov2640", },
1281 {},
1282 };
1283 MODULE_DEVICE_TABLE(of, ov2640_of_match);
1284
1285 static struct i2c_driver ov2640_i2c_driver = {
1286 .driver = {
1287 .name = "ov2640",
1288 .of_match_table = ov2640_of_match,
1289 },
1290 .probe = ov2640_probe,
1291 .remove = ov2640_remove,
1292 .id_table = ov2640_id,
1293 };
1294
1295 module_i2c_driver(ov2640_i2c_driver);
1296
1297 MODULE_DESCRIPTION("Driver for Omni Vision 2640 sensor");
1298 MODULE_AUTHOR("Alberto Panizzo");
1299 MODULE_LICENSE("GPL v2");
1300