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20#include <linux/clk.h>
21#include <linux/init.h>
22#include <linux/module.h>
23#include <linux/i2c.h>
24#include <linux/slab.h>
25#include <linux/delay.h>
26#include <linux/v4l2-mediabus.h>
27#include <linux/videodev2.h>
28
29#include <media/v4l2-async.h>
30#include <media/v4l2-common.h>
31#include <media/v4l2-ctrls.h>
32#include <media/v4l2-device.h>
33#include <media/v4l2-event.h>
34
35#include <linux/gpio/consumer.h>
36
37#include "ov9640.h"
38
39#define to_ov9640_sensor(sd) container_of(sd, struct ov9640_priv, subdev)
40
41
42static const struct ov9640_reg ov9640_regs_dflt[] = {
43 { OV9640_COM5, OV9640_COM5_SYSCLK | OV9640_COM5_LONGEXP },
44 { OV9640_COM6, OV9640_COM6_OPT_BLC | OV9640_COM6_ADBLC_BIAS |
45 OV9640_COM6_FMT_RST | OV9640_COM6_ADBLC_OPTEN },
46 { OV9640_PSHFT, OV9640_PSHFT_VAL(0x01) },
47 { OV9640_ACOM, OV9640_ACOM_2X_ANALOG | OV9640_ACOM_RSVD },
48 { OV9640_TSLB, OV9640_TSLB_YUYV_UYVY },
49 { OV9640_COM16, OV9640_COM16_RB_AVG },
50
51
52 { 0x6c, 0x40 }, { 0x6d, 0x30 }, { 0x6e, 0x4b }, { 0x6f, 0x60 },
53 { 0x70, 0x70 }, { 0x71, 0x70 }, { 0x72, 0x70 }, { 0x73, 0x70 },
54 { 0x74, 0x60 }, { 0x75, 0x60 }, { 0x76, 0x50 }, { 0x77, 0x48 },
55 { 0x78, 0x3a }, { 0x79, 0x2e }, { 0x7a, 0x28 }, { 0x7b, 0x22 },
56
57
58 { 0x7c, 0x04 }, { 0x7d, 0x07 }, { 0x7e, 0x10 }, { 0x7f, 0x28 },
59 { 0x80, 0x36 }, { 0x81, 0x44 }, { 0x82, 0x52 }, { 0x83, 0x60 },
60 { 0x84, 0x6c }, { 0x85, 0x78 }, { 0x86, 0x8c }, { 0x87, 0x9e },
61 { 0x88, 0xbb }, { 0x89, 0xd2 }, { 0x8a, 0xe6 },
62};
63
64
65
66
67
68
69
70
71
72
73static const struct ov9640_reg ov9640_regs_qqcif[] = {
74 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x0f) },
75 { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
76 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
77 { OV9640_COM7, OV9640_COM7_QCIF },
78 { OV9640_COM12, OV9640_COM12_RSVD },
79 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
80 { OV9640_COM15, OV9640_COM15_OR_10F0 },
81};
82
83static const struct ov9640_reg ov9640_regs_qqvga[] = {
84 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
85 { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
86 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
87 { OV9640_COM7, OV9640_COM7_QVGA },
88 { OV9640_COM12, OV9640_COM12_RSVD },
89 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
90 { OV9640_COM15, OV9640_COM15_OR_10F0 },
91};
92
93static const struct ov9640_reg ov9640_regs_qcif[] = {
94 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
95 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
96 { OV9640_COM7, OV9640_COM7_QCIF },
97 { OV9640_COM12, OV9640_COM12_RSVD },
98 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
99 { OV9640_COM15, OV9640_COM15_OR_10F0 },
100};
101
102static const struct ov9640_reg ov9640_regs_qvga[] = {
103 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
104 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
105 { OV9640_COM7, OV9640_COM7_QVGA },
106 { OV9640_COM12, OV9640_COM12_RSVD },
107 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
108 { OV9640_COM15, OV9640_COM15_OR_10F0 },
109};
110
111static const struct ov9640_reg ov9640_regs_cif[] = {
112 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
113 { OV9640_COM3, OV9640_COM3_VP },
114 { OV9640_COM7, OV9640_COM7_CIF },
115 { OV9640_COM12, OV9640_COM12_RSVD },
116 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
117 { OV9640_COM15, OV9640_COM15_OR_10F0 },
118};
119
120static const struct ov9640_reg ov9640_regs_vga[] = {
121 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
122 { OV9640_COM3, OV9640_COM3_VP },
123 { OV9640_COM7, OV9640_COM7_VGA },
124 { OV9640_COM12, OV9640_COM12_RSVD },
125 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
126 { OV9640_COM15, OV9640_COM15_OR_10F0 },
127};
128
129static const struct ov9640_reg ov9640_regs_sxga[] = {
130 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
131 { OV9640_COM3, OV9640_COM3_VP },
132 { OV9640_COM7, 0 },
133 { OV9640_COM12, OV9640_COM12_RSVD },
134 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
135 { OV9640_COM15, OV9640_COM15_OR_10F0 },
136};
137
138static const struct ov9640_reg ov9640_regs_yuv[] = {
139 { OV9640_MTX1, 0x58 },
140 { OV9640_MTX2, 0x48 },
141 { OV9640_MTX3, 0x10 },
142 { OV9640_MTX4, 0x28 },
143 { OV9640_MTX5, 0x48 },
144 { OV9640_MTX6, 0x70 },
145 { OV9640_MTX7, 0x40 },
146 { OV9640_MTX8, 0x40 },
147 { OV9640_MTX9, 0x40 },
148 { OV9640_MTXS, 0x0f },
149};
150
151static const struct ov9640_reg ov9640_regs_rgb[] = {
152 { OV9640_MTX1, 0x71 },
153 { OV9640_MTX2, 0x3e },
154 { OV9640_MTX3, 0x0c },
155 { OV9640_MTX4, 0x33 },
156 { OV9640_MTX5, 0x72 },
157 { OV9640_MTX6, 0x00 },
158 { OV9640_MTX7, 0x2b },
159 { OV9640_MTX8, 0x66 },
160 { OV9640_MTX9, 0xd2 },
161 { OV9640_MTXS, 0x65 },
162};
163
164static const u32 ov9640_codes[] = {
165 MEDIA_BUS_FMT_UYVY8_2X8,
166 MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
167 MEDIA_BUS_FMT_RGB565_2X8_LE,
168};
169
170
171static int ov9640_reg_read(struct i2c_client *client, u8 reg, u8 *val)
172{
173 int ret;
174 u8 data = reg;
175 struct i2c_msg msg = {
176 .addr = client->addr,
177 .flags = 0,
178 .len = 1,
179 .buf = &data,
180 };
181
182 ret = i2c_transfer(client->adapter, &msg, 1);
183 if (ret < 0)
184 goto err;
185
186 msg.flags = I2C_M_RD;
187 ret = i2c_transfer(client->adapter, &msg, 1);
188 if (ret < 0)
189 goto err;
190
191 *val = data;
192 return 0;
193
194err:
195 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
196 return ret;
197}
198
199
200static int ov9640_reg_write(struct i2c_client *client, u8 reg, u8 val)
201{
202 int ret;
203 u8 _val;
204 unsigned char data[2] = { reg, val };
205 struct i2c_msg msg = {
206 .addr = client->addr,
207 .flags = 0,
208 .len = 2,
209 .buf = data,
210 };
211
212 ret = i2c_transfer(client->adapter, &msg, 1);
213 if (ret < 0) {
214 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
215 return ret;
216 }
217
218
219 ret = ov9640_reg_read(client, reg, &_val);
220 if (ret)
221 dev_err(&client->dev,
222 "Failed reading back register 0x%02x!\n", reg);
223
224 return 0;
225}
226
227
228
229static int ov9640_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 unset)
230{
231 u8 val;
232 int ret;
233
234 ret = ov9640_reg_read(client, reg, &val);
235 if (ret) {
236 dev_err(&client->dev,
237 "[Read]-Modify-Write of register %02x failed!\n", reg);
238 return ret;
239 }
240
241 val |= set;
242 val &= ~unset;
243
244 ret = ov9640_reg_write(client, reg, val);
245 if (ret)
246 dev_err(&client->dev,
247 "Read-Modify-[Write] of register %02x failed!\n", reg);
248
249 return ret;
250}
251
252
253static int ov9640_reset(struct i2c_client *client)
254{
255 int ret;
256
257 ret = ov9640_reg_write(client, OV9640_COM7, OV9640_COM7_SCCB_RESET);
258 if (ret)
259 dev_err(&client->dev,
260 "An error occurred while entering soft reset!\n");
261
262 return ret;
263}
264
265
266static int ov9640_s_stream(struct v4l2_subdev *sd, int enable)
267{
268 return 0;
269}
270
271
272static int ov9640_s_ctrl(struct v4l2_ctrl *ctrl)
273{
274 struct ov9640_priv *priv = container_of(ctrl->handler,
275 struct ov9640_priv, hdl);
276 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
277
278 switch (ctrl->id) {
279 case V4L2_CID_VFLIP:
280 if (ctrl->val)
281 return ov9640_reg_rmw(client, OV9640_MVFP,
282 OV9640_MVFP_V, 0);
283 return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_V);
284 case V4L2_CID_HFLIP:
285 if (ctrl->val)
286 return ov9640_reg_rmw(client, OV9640_MVFP,
287 OV9640_MVFP_H, 0);
288 return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_H);
289 }
290
291 return -EINVAL;
292}
293
294#ifdef CONFIG_VIDEO_ADV_DEBUG
295static int ov9640_get_register(struct v4l2_subdev *sd,
296 struct v4l2_dbg_register *reg)
297{
298 struct i2c_client *client = v4l2_get_subdevdata(sd);
299 int ret;
300 u8 val;
301
302 if (reg->reg & ~0xff)
303 return -EINVAL;
304
305 reg->size = 1;
306
307 ret = ov9640_reg_read(client, reg->reg, &val);
308 if (ret)
309 return ret;
310
311 reg->val = (__u64)val;
312
313 return 0;
314}
315
316static int ov9640_set_register(struct v4l2_subdev *sd,
317 const struct v4l2_dbg_register *reg)
318{
319 struct i2c_client *client = v4l2_get_subdevdata(sd);
320
321 if (reg->reg & ~0xff || reg->val & ~0xff)
322 return -EINVAL;
323
324 return ov9640_reg_write(client, reg->reg, reg->val);
325}
326#endif
327
328static int ov9640_s_power(struct v4l2_subdev *sd, int on)
329{
330 struct ov9640_priv *priv = to_ov9640_sensor(sd);
331 int ret = 0;
332
333 if (on) {
334 gpiod_set_value(priv->gpio_power, 1);
335 usleep_range(1000, 2000);
336 ret = clk_prepare_enable(priv->clk);
337 usleep_range(1000, 2000);
338 gpiod_set_value(priv->gpio_reset, 0);
339 } else {
340 gpiod_set_value(priv->gpio_reset, 1);
341 usleep_range(1000, 2000);
342 clk_disable_unprepare(priv->clk);
343 usleep_range(1000, 2000);
344 gpiod_set_value(priv->gpio_power, 0);
345 }
346
347 return ret;
348}
349
350
351static void ov9640_res_roundup(u32 *width, u32 *height)
352{
353 unsigned int i;
354 enum { QQCIF, QQVGA, QCIF, QVGA, CIF, VGA, SXGA };
355 static const u32 res_x[] = { 88, 160, 176, 320, 352, 640, 1280 };
356 static const u32 res_y[] = { 72, 120, 144, 240, 288, 480, 960 };
357
358 for (i = 0; i < ARRAY_SIZE(res_x); i++) {
359 if (res_x[i] >= *width && res_y[i] >= *height) {
360 *width = res_x[i];
361 *height = res_y[i];
362 return;
363 }
364 }
365
366 *width = res_x[SXGA];
367 *height = res_y[SXGA];
368}
369
370
371static void ov9640_alter_regs(u32 code,
372 struct ov9640_reg_alt *alt)
373{
374 switch (code) {
375 default:
376 case MEDIA_BUS_FMT_UYVY8_2X8:
377 alt->com12 = OV9640_COM12_YUV_AVG;
378 alt->com13 = OV9640_COM13_Y_DELAY_EN |
379 OV9640_COM13_YUV_DLY(0x01);
380 break;
381 case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
382 alt->com7 = OV9640_COM7_RGB;
383 alt->com13 = OV9640_COM13_RGB_AVG;
384 alt->com15 = OV9640_COM15_RGB_555;
385 break;
386 case MEDIA_BUS_FMT_RGB565_2X8_LE:
387 alt->com7 = OV9640_COM7_RGB;
388 alt->com13 = OV9640_COM13_RGB_AVG;
389 alt->com15 = OV9640_COM15_RGB_565;
390 break;
391 }
392}
393
394
395static int ov9640_write_regs(struct i2c_client *client, u32 width,
396 u32 code, struct ov9640_reg_alt *alts)
397{
398 const struct ov9640_reg *ov9640_regs, *matrix_regs;
399 unsigned int ov9640_regs_len, matrix_regs_len;
400 unsigned int i;
401 int ret;
402 u8 val;
403
404
405 switch (width) {
406 case W_QQCIF:
407 ov9640_regs = ov9640_regs_qqcif;
408 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqcif);
409 break;
410 case W_QQVGA:
411 ov9640_regs = ov9640_regs_qqvga;
412 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqvga);
413 break;
414 case W_QCIF:
415 ov9640_regs = ov9640_regs_qcif;
416 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qcif);
417 break;
418 case W_QVGA:
419 ov9640_regs = ov9640_regs_qvga;
420 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qvga);
421 break;
422 case W_CIF:
423 ov9640_regs = ov9640_regs_cif;
424 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_cif);
425 break;
426 case W_VGA:
427 ov9640_regs = ov9640_regs_vga;
428 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_vga);
429 break;
430 case W_SXGA:
431 ov9640_regs = ov9640_regs_sxga;
432 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_sxga);
433 break;
434 default:
435 dev_err(&client->dev, "Failed to select resolution!\n");
436 return -EINVAL;
437 }
438
439
440 if (code == MEDIA_BUS_FMT_UYVY8_2X8) {
441 matrix_regs = ov9640_regs_yuv;
442 matrix_regs_len = ARRAY_SIZE(ov9640_regs_yuv);
443 } else {
444 matrix_regs = ov9640_regs_rgb;
445 matrix_regs_len = ARRAY_SIZE(ov9640_regs_rgb);
446 }
447
448
449 for (i = 0; i < ov9640_regs_len; i++) {
450 val = ov9640_regs[i].val;
451
452 switch (ov9640_regs[i].reg) {
453 case OV9640_COM7:
454 val |= alts->com7;
455 break;
456 case OV9640_COM12:
457 val |= alts->com12;
458 break;
459 case OV9640_COM13:
460 val |= alts->com13;
461 break;
462 case OV9640_COM15:
463 val |= alts->com15;
464 break;
465 }
466
467 ret = ov9640_reg_write(client, ov9640_regs[i].reg, val);
468 if (ret)
469 return ret;
470 }
471
472
473 for (i = 0; i < matrix_regs_len; i++) {
474 ret = ov9640_reg_write(client, matrix_regs[i].reg,
475 matrix_regs[i].val);
476 if (ret)
477 return ret;
478 }
479
480 return 0;
481}
482
483
484static int ov9640_prog_dflt(struct i2c_client *client)
485{
486 unsigned int i;
487 int ret;
488
489 for (i = 0; i < ARRAY_SIZE(ov9640_regs_dflt); i++) {
490 ret = ov9640_reg_write(client, ov9640_regs_dflt[i].reg,
491 ov9640_regs_dflt[i].val);
492 if (ret)
493 return ret;
494 }
495
496
497 msleep(150);
498
499 return 0;
500}
501
502
503static int ov9640_s_fmt(struct v4l2_subdev *sd,
504 struct v4l2_mbus_framefmt *mf)
505{
506 struct i2c_client *client = v4l2_get_subdevdata(sd);
507 struct ov9640_reg_alt alts = {0};
508 int ret;
509
510 ov9640_alter_regs(mf->code, &alts);
511
512 ov9640_reset(client);
513
514 ret = ov9640_prog_dflt(client);
515 if (ret)
516 return ret;
517
518 return ov9640_write_regs(client, mf->width, mf->code, &alts);
519}
520
521static int ov9640_set_fmt(struct v4l2_subdev *sd,
522 struct v4l2_subdev_state *sd_state,
523 struct v4l2_subdev_format *format)
524{
525 struct v4l2_mbus_framefmt *mf = &format->format;
526
527 if (format->pad)
528 return -EINVAL;
529
530 ov9640_res_roundup(&mf->width, &mf->height);
531
532 mf->field = V4L2_FIELD_NONE;
533
534 switch (mf->code) {
535 case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
536 case MEDIA_BUS_FMT_RGB565_2X8_LE:
537 mf->colorspace = V4L2_COLORSPACE_SRGB;
538 break;
539 default:
540 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
541 fallthrough;
542 case MEDIA_BUS_FMT_UYVY8_2X8:
543 mf->colorspace = V4L2_COLORSPACE_JPEG;
544 break;
545 }
546
547 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
548 return ov9640_s_fmt(sd, mf);
549
550 sd_state->pads->try_fmt = *mf;
551
552 return 0;
553}
554
555static int ov9640_enum_mbus_code(struct v4l2_subdev *sd,
556 struct v4l2_subdev_state *sd_state,
557 struct v4l2_subdev_mbus_code_enum *code)
558{
559 if (code->pad || code->index >= ARRAY_SIZE(ov9640_codes))
560 return -EINVAL;
561
562 code->code = ov9640_codes[code->index];
563
564 return 0;
565}
566
567static int ov9640_get_selection(struct v4l2_subdev *sd,
568 struct v4l2_subdev_state *sd_state,
569 struct v4l2_subdev_selection *sel)
570{
571 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
572 return -EINVAL;
573
574 sel->r.left = 0;
575 sel->r.top = 0;
576 switch (sel->target) {
577 case V4L2_SEL_TGT_CROP_BOUNDS:
578 case V4L2_SEL_TGT_CROP:
579 sel->r.width = W_SXGA;
580 sel->r.height = H_SXGA;
581 return 0;
582 default:
583 return -EINVAL;
584 }
585}
586
587static int ov9640_video_probe(struct i2c_client *client)
588{
589 struct v4l2_subdev *sd = i2c_get_clientdata(client);
590 struct ov9640_priv *priv = to_ov9640_sensor(sd);
591 u8 pid, ver, midh, midl;
592 const char *devname;
593 int ret;
594
595 ret = ov9640_s_power(&priv->subdev, 1);
596 if (ret < 0)
597 return ret;
598
599
600
601
602
603 ret = ov9640_reg_read(client, OV9640_PID, &pid);
604 if (!ret)
605 ret = ov9640_reg_read(client, OV9640_VER, &ver);
606 if (!ret)
607 ret = ov9640_reg_read(client, OV9640_MIDH, &midh);
608 if (!ret)
609 ret = ov9640_reg_read(client, OV9640_MIDL, &midl);
610 if (ret)
611 goto done;
612
613 switch (VERSION(pid, ver)) {
614 case OV9640_V2:
615 devname = "ov9640";
616 priv->revision = 2;
617 break;
618 case OV9640_V3:
619 devname = "ov9640";
620 priv->revision = 3;
621 break;
622 default:
623 dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver);
624 ret = -ENODEV;
625 goto done;
626 }
627
628 dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
629 devname, pid, ver, midh, midl);
630
631 ret = v4l2_ctrl_handler_setup(&priv->hdl);
632
633done:
634 ov9640_s_power(&priv->subdev, 0);
635 return ret;
636}
637
638static const struct v4l2_ctrl_ops ov9640_ctrl_ops = {
639 .s_ctrl = ov9640_s_ctrl,
640};
641
642static const struct v4l2_subdev_core_ops ov9640_core_ops = {
643#ifdef CONFIG_VIDEO_ADV_DEBUG
644 .g_register = ov9640_get_register,
645 .s_register = ov9640_set_register,
646#endif
647 .s_power = ov9640_s_power,
648};
649
650
651static int ov9640_get_mbus_config(struct v4l2_subdev *sd,
652 unsigned int pad,
653 struct v4l2_mbus_config *cfg)
654{
655 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
656 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
657 V4L2_MBUS_DATA_ACTIVE_HIGH;
658 cfg->type = V4L2_MBUS_PARALLEL;
659
660 return 0;
661}
662
663static const struct v4l2_subdev_video_ops ov9640_video_ops = {
664 .s_stream = ov9640_s_stream,
665};
666
667static const struct v4l2_subdev_pad_ops ov9640_pad_ops = {
668 .enum_mbus_code = ov9640_enum_mbus_code,
669 .get_selection = ov9640_get_selection,
670 .set_fmt = ov9640_set_fmt,
671 .get_mbus_config = ov9640_get_mbus_config,
672};
673
674static const struct v4l2_subdev_ops ov9640_subdev_ops = {
675 .core = &ov9640_core_ops,
676 .video = &ov9640_video_ops,
677 .pad = &ov9640_pad_ops,
678};
679
680
681
682
683static int ov9640_probe(struct i2c_client *client,
684 const struct i2c_device_id *did)
685{
686 struct ov9640_priv *priv;
687 int ret;
688
689 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
690 if (!priv)
691 return -ENOMEM;
692
693 priv->gpio_power = devm_gpiod_get(&client->dev, "Camera power",
694 GPIOD_OUT_LOW);
695 if (IS_ERR(priv->gpio_power)) {
696 ret = PTR_ERR(priv->gpio_power);
697 return ret;
698 }
699
700 priv->gpio_reset = devm_gpiod_get(&client->dev, "Camera reset",
701 GPIOD_OUT_HIGH);
702 if (IS_ERR(priv->gpio_reset)) {
703 ret = PTR_ERR(priv->gpio_reset);
704 return ret;
705 }
706
707 v4l2_i2c_subdev_init(&priv->subdev, client, &ov9640_subdev_ops);
708
709 v4l2_ctrl_handler_init(&priv->hdl, 2);
710 v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,
711 V4L2_CID_VFLIP, 0, 1, 1, 0);
712 v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,
713 V4L2_CID_HFLIP, 0, 1, 1, 0);
714
715 if (priv->hdl.error) {
716 ret = priv->hdl.error;
717 goto ectrlinit;
718 }
719
720 priv->subdev.ctrl_handler = &priv->hdl;
721
722 priv->clk = devm_clk_get(&client->dev, "mclk");
723 if (IS_ERR(priv->clk)) {
724 ret = PTR_ERR(priv->clk);
725 goto ectrlinit;
726 }
727
728 ret = ov9640_video_probe(client);
729 if (ret)
730 goto ectrlinit;
731
732 priv->subdev.dev = &client->dev;
733 ret = v4l2_async_register_subdev(&priv->subdev);
734 if (ret)
735 goto ectrlinit;
736
737 return 0;
738
739ectrlinit:
740 v4l2_ctrl_handler_free(&priv->hdl);
741
742 return ret;
743}
744
745static int ov9640_remove(struct i2c_client *client)
746{
747 struct v4l2_subdev *sd = i2c_get_clientdata(client);
748 struct ov9640_priv *priv = to_ov9640_sensor(sd);
749
750 v4l2_async_unregister_subdev(&priv->subdev);
751 v4l2_ctrl_handler_free(&priv->hdl);
752
753 return 0;
754}
755
756static const struct i2c_device_id ov9640_id[] = {
757 { "ov9640", 0 },
758 { }
759};
760MODULE_DEVICE_TABLE(i2c, ov9640_id);
761
762static struct i2c_driver ov9640_i2c_driver = {
763 .driver = {
764 .name = "ov9640",
765 },
766 .probe = ov9640_probe,
767 .remove = ov9640_remove,
768 .id_table = ov9640_id,
769};
770
771module_i2c_driver(ov9640_i2c_driver);
772
773MODULE_DESCRIPTION("OmniVision OV96xx CMOS Image Sensor driver");
774MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
775MODULE_LICENSE("GPL v2");
776
