1 /*
2 * OmniVision OV96xx Camera Driver
3 *
4 * Copyright (C) 2009 Marek Vasut <marek.vasut@gmail.com>
5 *
6 * Based on ov772x camera driver:
7 *
8 * Copyright (C) 2008 Renesas Solutions Corp.
9 * Kuninori Morimoto <morimoto.kuninori@renesas.com>
10 *
11 * Based on ov7670 and soc_camera_platform driver,
12 *
13 * Copyright 2006-7 Jonathan Corbet <corbet@lwn.net>
14 * Copyright (C) 2008 Magnus Damm
15 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
16 *
17 * This program is free software; you can redistribute it and/or modify
18 * it under the terms of the GNU General Public License version 2 as
19 * published by the Free Software Foundation.
20 */
21
22 #include <linux/init.h>
23 #include <linux/module.h>
24 #include <linux/i2c.h>
25 #include <linux/slab.h>
26 #include <linux/delay.h>
27 #include <linux/v4l2-mediabus.h>
28 #include <linux/videodev2.h>
29
30 #include <media/soc_camera.h>
31 #include <media/v4l2-clk.h>
32 #include <media/v4l2-common.h>
33 #include <media/v4l2-ctrls.h>
34
35 #include "ov9640.h"
36
37 #define to_ov9640_sensor(sd) container_of(sd, struct ov9640_priv, subdev)
38
39 /* default register setup */
40 static const struct ov9640_reg ov9640_regs_dflt[] = {
41 { OV9640_COM5, OV9640_COM5_SYSCLK | OV9640_COM5_LONGEXP },
42 { OV9640_COM6, OV9640_COM6_OPT_BLC | OV9640_COM6_ADBLC_BIAS |
43 OV9640_COM6_FMT_RST | OV9640_COM6_ADBLC_OPTEN },
44 { OV9640_PSHFT, OV9640_PSHFT_VAL(0x01) },
45 { OV9640_ACOM, OV9640_ACOM_2X_ANALOG | OV9640_ACOM_RSVD },
46 { OV9640_TSLB, OV9640_TSLB_YUYV_UYVY },
47 { OV9640_COM16, OV9640_COM16_RB_AVG },
48
49 /* Gamma curve P */
50 { 0x6c, 0x40 }, { 0x6d, 0x30 }, { 0x6e, 0x4b }, { 0x6f, 0x60 },
51 { 0x70, 0x70 }, { 0x71, 0x70 }, { 0x72, 0x70 }, { 0x73, 0x70 },
52 { 0x74, 0x60 }, { 0x75, 0x60 }, { 0x76, 0x50 }, { 0x77, 0x48 },
53 { 0x78, 0x3a }, { 0x79, 0x2e }, { 0x7a, 0x28 }, { 0x7b, 0x22 },
54
55 /* Gamma curve T */
56 { 0x7c, 0x04 }, { 0x7d, 0x07 }, { 0x7e, 0x10 }, { 0x7f, 0x28 },
57 { 0x80, 0x36 }, { 0x81, 0x44 }, { 0x82, 0x52 }, { 0x83, 0x60 },
58 { 0x84, 0x6c }, { 0x85, 0x78 }, { 0x86, 0x8c }, { 0x87, 0x9e },
59 { 0x88, 0xbb }, { 0x89, 0xd2 }, { 0x8a, 0xe6 },
60 };
61
62 /* Configurations
63 * NOTE: for YUV, alter the following registers:
64 * COM12 |= OV9640_COM12_YUV_AVG
65 *
66 * for RGB, alter the following registers:
67 * COM7 |= OV9640_COM7_RGB
68 * COM13 |= OV9640_COM13_RGB_AVG
69 * COM15 |= proper RGB color encoding mode
70 */
71 static const struct ov9640_reg ov9640_regs_qqcif[] = {
72 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x0f) },
73 { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
74 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
75 { OV9640_COM7, OV9640_COM7_QCIF },
76 { OV9640_COM12, OV9640_COM12_RSVD },
77 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
78 { OV9640_COM15, OV9640_COM15_OR_10F0 },
79 };
80
81 static const struct ov9640_reg ov9640_regs_qqvga[] = {
82 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
83 { OV9640_COM1, OV9640_COM1_QQFMT | OV9640_COM1_HREF_2SKIP },
84 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
85 { OV9640_COM7, OV9640_COM7_QVGA },
86 { OV9640_COM12, OV9640_COM12_RSVD },
87 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
88 { OV9640_COM15, OV9640_COM15_OR_10F0 },
89 };
90
91 static const struct ov9640_reg ov9640_regs_qcif[] = {
92 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x07) },
93 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
94 { OV9640_COM7, OV9640_COM7_QCIF },
95 { OV9640_COM12, OV9640_COM12_RSVD },
96 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
97 { OV9640_COM15, OV9640_COM15_OR_10F0 },
98 };
99
100 static const struct ov9640_reg ov9640_regs_qvga[] = {
101 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
102 { OV9640_COM4, OV9640_COM4_QQ_VP | OV9640_COM4_RSVD },
103 { OV9640_COM7, OV9640_COM7_QVGA },
104 { OV9640_COM12, OV9640_COM12_RSVD },
105 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
106 { OV9640_COM15, OV9640_COM15_OR_10F0 },
107 };
108
109 static const struct ov9640_reg ov9640_regs_cif[] = {
110 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x03) },
111 { OV9640_COM3, OV9640_COM3_VP },
112 { OV9640_COM7, OV9640_COM7_CIF },
113 { OV9640_COM12, OV9640_COM12_RSVD },
114 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
115 { OV9640_COM15, OV9640_COM15_OR_10F0 },
116 };
117
118 static const struct ov9640_reg ov9640_regs_vga[] = {
119 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
120 { OV9640_COM3, OV9640_COM3_VP },
121 { OV9640_COM7, OV9640_COM7_VGA },
122 { OV9640_COM12, OV9640_COM12_RSVD },
123 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
124 { OV9640_COM15, OV9640_COM15_OR_10F0 },
125 };
126
127 static const struct ov9640_reg ov9640_regs_sxga[] = {
128 { OV9640_CLKRC, OV9640_CLKRC_DPLL_EN | OV9640_CLKRC_DIV(0x01) },
129 { OV9640_COM3, OV9640_COM3_VP },
130 { OV9640_COM7, 0 },
131 { OV9640_COM12, OV9640_COM12_RSVD },
132 { OV9640_COM13, OV9640_COM13_GAMMA_RAW | OV9640_COM13_MATRIX_EN },
133 { OV9640_COM15, OV9640_COM15_OR_10F0 },
134 };
135
136 static const struct ov9640_reg ov9640_regs_yuv[] = {
137 { OV9640_MTX1, 0x58 },
138 { OV9640_MTX2, 0x48 },
139 { OV9640_MTX3, 0x10 },
140 { OV9640_MTX4, 0x28 },
141 { OV9640_MTX5, 0x48 },
142 { OV9640_MTX6, 0x70 },
143 { OV9640_MTX7, 0x40 },
144 { OV9640_MTX8, 0x40 },
145 { OV9640_MTX9, 0x40 },
146 { OV9640_MTXS, 0x0f },
147 };
148
149 static const struct ov9640_reg ov9640_regs_rgb[] = {
150 { OV9640_MTX1, 0x71 },
151 { OV9640_MTX2, 0x3e },
152 { OV9640_MTX3, 0x0c },
153 { OV9640_MTX4, 0x33 },
154 { OV9640_MTX5, 0x72 },
155 { OV9640_MTX6, 0x00 },
156 { OV9640_MTX7, 0x2b },
157 { OV9640_MTX8, 0x66 },
158 { OV9640_MTX9, 0xd2 },
159 { OV9640_MTXS, 0x65 },
160 };
161
162 static u32 ov9640_codes[] = {
163 MEDIA_BUS_FMT_UYVY8_2X8,
164 MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE,
165 MEDIA_BUS_FMT_RGB565_2X8_LE,
166 };
167
168 /* read a register */
ov9640_reg_read(struct i2c_client * client,u8 reg,u8 * val)169 static int ov9640_reg_read(struct i2c_client *client, u8 reg, u8 *val)
170 {
171 int ret;
172 u8 data = reg;
173 struct i2c_msg msg = {
174 .addr = client->addr,
175 .flags = 0,
176 .len = 1,
177 .buf = &data,
178 };
179
180 ret = i2c_transfer(client->adapter, &msg, 1);
181 if (ret < 0)
182 goto err;
183
184 msg.flags = I2C_M_RD;
185 ret = i2c_transfer(client->adapter, &msg, 1);
186 if (ret < 0)
187 goto err;
188
189 *val = data;
190 return 0;
191
192 err:
193 dev_err(&client->dev, "Failed reading register 0x%02x!\n", reg);
194 return ret;
195 }
196
197 /* write a register */
ov9640_reg_write(struct i2c_client * client,u8 reg,u8 val)198 static int ov9640_reg_write(struct i2c_client *client, u8 reg, u8 val)
199 {
200 int ret;
201 u8 _val;
202 unsigned char data[2] = { reg, val };
203 struct i2c_msg msg = {
204 .addr = client->addr,
205 .flags = 0,
206 .len = 2,
207 .buf = data,
208 };
209
210 ret = i2c_transfer(client->adapter, &msg, 1);
211 if (ret < 0) {
212 dev_err(&client->dev, "Failed writing register 0x%02x!\n", reg);
213 return ret;
214 }
215
216 /* we have to read the register back ... no idea why, maybe HW bug */
217 ret = ov9640_reg_read(client, reg, &_val);
218 if (ret)
219 dev_err(&client->dev,
220 "Failed reading back register 0x%02x!\n", reg);
221
222 return 0;
223 }
224
225
226 /* Read a register, alter its bits, write it back */
ov9640_reg_rmw(struct i2c_client * client,u8 reg,u8 set,u8 unset)227 static int ov9640_reg_rmw(struct i2c_client *client, u8 reg, u8 set, u8 unset)
228 {
229 u8 val;
230 int ret;
231
232 ret = ov9640_reg_read(client, reg, &val);
233 if (ret) {
234 dev_err(&client->dev,
235 "[Read]-Modify-Write of register %02x failed!\n", reg);
236 return ret;
237 }
238
239 val |= set;
240 val &= ~unset;
241
242 ret = ov9640_reg_write(client, reg, val);
243 if (ret)
244 dev_err(&client->dev,
245 "Read-Modify-[Write] of register %02x failed!\n", reg);
246
247 return ret;
248 }
249
250 /* Soft reset the camera. This has nothing to do with the RESET pin! */
ov9640_reset(struct i2c_client * client)251 static int ov9640_reset(struct i2c_client *client)
252 {
253 int ret;
254
255 ret = ov9640_reg_write(client, OV9640_COM7, OV9640_COM7_SCCB_RESET);
256 if (ret)
257 dev_err(&client->dev,
258 "An error occurred while entering soft reset!\n");
259
260 return ret;
261 }
262
263 /* Start/Stop streaming from the device */
ov9640_s_stream(struct v4l2_subdev * sd,int enable)264 static int ov9640_s_stream(struct v4l2_subdev *sd, int enable)
265 {
266 return 0;
267 }
268
269 /* Set status of additional camera capabilities */
ov9640_s_ctrl(struct v4l2_ctrl * ctrl)270 static int ov9640_s_ctrl(struct v4l2_ctrl *ctrl)
271 {
272 struct ov9640_priv *priv = container_of(ctrl->handler, struct ov9640_priv, hdl);
273 struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
274
275 switch (ctrl->id) {
276 case V4L2_CID_VFLIP:
277 if (ctrl->val)
278 return ov9640_reg_rmw(client, OV9640_MVFP,
279 OV9640_MVFP_V, 0);
280 return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_V);
281 case V4L2_CID_HFLIP:
282 if (ctrl->val)
283 return ov9640_reg_rmw(client, OV9640_MVFP,
284 OV9640_MVFP_H, 0);
285 return ov9640_reg_rmw(client, OV9640_MVFP, 0, OV9640_MVFP_H);
286 }
287 return -EINVAL;
288 }
289
290 #ifdef CONFIG_VIDEO_ADV_DEBUG
ov9640_get_register(struct v4l2_subdev * sd,struct v4l2_dbg_register * reg)291 static int ov9640_get_register(struct v4l2_subdev *sd,
292 struct v4l2_dbg_register *reg)
293 {
294 struct i2c_client *client = v4l2_get_subdevdata(sd);
295 int ret;
296 u8 val;
297
298 if (reg->reg & ~0xff)
299 return -EINVAL;
300
301 reg->size = 1;
302
303 ret = ov9640_reg_read(client, reg->reg, &val);
304 if (ret)
305 return ret;
306
307 reg->val = (__u64)val;
308
309 return 0;
310 }
311
ov9640_set_register(struct v4l2_subdev * sd,const struct v4l2_dbg_register * reg)312 static int ov9640_set_register(struct v4l2_subdev *sd,
313 const struct v4l2_dbg_register *reg)
314 {
315 struct i2c_client *client = v4l2_get_subdevdata(sd);
316
317 if (reg->reg & ~0xff || reg->val & ~0xff)
318 return -EINVAL;
319
320 return ov9640_reg_write(client, reg->reg, reg->val);
321 }
322 #endif
323
ov9640_s_power(struct v4l2_subdev * sd,int on)324 static int ov9640_s_power(struct v4l2_subdev *sd, int on)
325 {
326 struct i2c_client *client = v4l2_get_subdevdata(sd);
327 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
328 struct ov9640_priv *priv = to_ov9640_sensor(sd);
329
330 return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
331 }
332
333 /* select nearest higher resolution for capture */
ov9640_res_roundup(u32 * width,u32 * height)334 static void ov9640_res_roundup(u32 *width, u32 *height)
335 {
336 int i;
337 enum { QQCIF, QQVGA, QCIF, QVGA, CIF, VGA, SXGA };
338 static const int res_x[] = { 88, 160, 176, 320, 352, 640, 1280 };
339 static const int res_y[] = { 72, 120, 144, 240, 288, 480, 960 };
340
341 for (i = 0; i < ARRAY_SIZE(res_x); i++) {
342 if (res_x[i] >= *width && res_y[i] >= *height) {
343 *width = res_x[i];
344 *height = res_y[i];
345 return;
346 }
347 }
348
349 *width = res_x[SXGA];
350 *height = res_y[SXGA];
351 }
352
353 /* Prepare necessary register changes depending on color encoding */
ov9640_alter_regs(u32 code,struct ov9640_reg_alt * alt)354 static void ov9640_alter_regs(u32 code,
355 struct ov9640_reg_alt *alt)
356 {
357 switch (code) {
358 default:
359 case MEDIA_BUS_FMT_UYVY8_2X8:
360 alt->com12 = OV9640_COM12_YUV_AVG;
361 alt->com13 = OV9640_COM13_Y_DELAY_EN |
362 OV9640_COM13_YUV_DLY(0x01);
363 break;
364 case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
365 alt->com7 = OV9640_COM7_RGB;
366 alt->com13 = OV9640_COM13_RGB_AVG;
367 alt->com15 = OV9640_COM15_RGB_555;
368 break;
369 case MEDIA_BUS_FMT_RGB565_2X8_LE:
370 alt->com7 = OV9640_COM7_RGB;
371 alt->com13 = OV9640_COM13_RGB_AVG;
372 alt->com15 = OV9640_COM15_RGB_565;
373 break;
374 }
375 }
376
377 /* Setup registers according to resolution and color encoding */
ov9640_write_regs(struct i2c_client * client,u32 width,u32 code,struct ov9640_reg_alt * alts)378 static int ov9640_write_regs(struct i2c_client *client, u32 width,
379 u32 code, struct ov9640_reg_alt *alts)
380 {
381 const struct ov9640_reg *ov9640_regs, *matrix_regs;
382 int ov9640_regs_len, matrix_regs_len;
383 int i, ret;
384 u8 val;
385
386 /* select register configuration for given resolution */
387 switch (width) {
388 case W_QQCIF:
389 ov9640_regs = ov9640_regs_qqcif;
390 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqcif);
391 break;
392 case W_QQVGA:
393 ov9640_regs = ov9640_regs_qqvga;
394 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qqvga);
395 break;
396 case W_QCIF:
397 ov9640_regs = ov9640_regs_qcif;
398 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qcif);
399 break;
400 case W_QVGA:
401 ov9640_regs = ov9640_regs_qvga;
402 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_qvga);
403 break;
404 case W_CIF:
405 ov9640_regs = ov9640_regs_cif;
406 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_cif);
407 break;
408 case W_VGA:
409 ov9640_regs = ov9640_regs_vga;
410 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_vga);
411 break;
412 case W_SXGA:
413 ov9640_regs = ov9640_regs_sxga;
414 ov9640_regs_len = ARRAY_SIZE(ov9640_regs_sxga);
415 break;
416 default:
417 dev_err(&client->dev, "Failed to select resolution!\n");
418 return -EINVAL;
419 }
420
421 /* select color matrix configuration for given color encoding */
422 if (code == MEDIA_BUS_FMT_UYVY8_2X8) {
423 matrix_regs = ov9640_regs_yuv;
424 matrix_regs_len = ARRAY_SIZE(ov9640_regs_yuv);
425 } else {
426 matrix_regs = ov9640_regs_rgb;
427 matrix_regs_len = ARRAY_SIZE(ov9640_regs_rgb);
428 }
429
430 /* write register settings into the module */
431 for (i = 0; i < ov9640_regs_len; i++) {
432 val = ov9640_regs[i].val;
433
434 switch (ov9640_regs[i].reg) {
435 case OV9640_COM7:
436 val |= alts->com7;
437 break;
438 case OV9640_COM12:
439 val |= alts->com12;
440 break;
441 case OV9640_COM13:
442 val |= alts->com13;
443 break;
444 case OV9640_COM15:
445 val |= alts->com15;
446 break;
447 }
448
449 ret = ov9640_reg_write(client, ov9640_regs[i].reg, val);
450 if (ret)
451 return ret;
452 }
453
454 /* write color matrix configuration into the module */
455 for (i = 0; i < matrix_regs_len; i++) {
456 ret = ov9640_reg_write(client, matrix_regs[i].reg,
457 matrix_regs[i].val);
458 if (ret)
459 return ret;
460 }
461
462 return 0;
463 }
464
465 /* program default register values */
ov9640_prog_dflt(struct i2c_client * client)466 static int ov9640_prog_dflt(struct i2c_client *client)
467 {
468 int i, ret;
469
470 for (i = 0; i < ARRAY_SIZE(ov9640_regs_dflt); i++) {
471 ret = ov9640_reg_write(client, ov9640_regs_dflt[i].reg,
472 ov9640_regs_dflt[i].val);
473 if (ret)
474 return ret;
475 }
476
477 /* wait for the changes to actually happen, 140ms are not enough yet */
478 mdelay(150);
479
480 return 0;
481 }
482
483 /* set the format we will capture in */
ov9640_s_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)484 static int ov9640_s_fmt(struct v4l2_subdev *sd,
485 struct v4l2_mbus_framefmt *mf)
486 {
487 struct i2c_client *client = v4l2_get_subdevdata(sd);
488 struct ov9640_reg_alt alts = {0};
489 int ret;
490
491 ov9640_alter_regs(mf->code, &alts);
492
493 ov9640_reset(client);
494
495 ret = ov9640_prog_dflt(client);
496 if (ret)
497 return ret;
498
499 return ov9640_write_regs(client, mf->width, mf->code, &alts);
500 }
501
ov9640_set_fmt(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_format * format)502 static int ov9640_set_fmt(struct v4l2_subdev *sd,
503 struct v4l2_subdev_pad_config *cfg,
504 struct v4l2_subdev_format *format)
505 {
506 struct v4l2_mbus_framefmt *mf = &format->format;
507
508 if (format->pad)
509 return -EINVAL;
510
511 ov9640_res_roundup(&mf->width, &mf->height);
512
513 mf->field = V4L2_FIELD_NONE;
514
515 switch (mf->code) {
516 case MEDIA_BUS_FMT_RGB555_2X8_PADHI_LE:
517 case MEDIA_BUS_FMT_RGB565_2X8_LE:
518 mf->colorspace = V4L2_COLORSPACE_SRGB;
519 break;
520 default:
521 mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
522 /* fall through */
523 case MEDIA_BUS_FMT_UYVY8_2X8:
524 mf->colorspace = V4L2_COLORSPACE_JPEG;
525 break;
526 }
527
528 if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
529 return ov9640_s_fmt(sd, mf);
530
531 cfg->try_fmt = *mf;
532 return 0;
533 }
534
ov9640_enum_mbus_code(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_mbus_code_enum * code)535 static int ov9640_enum_mbus_code(struct v4l2_subdev *sd,
536 struct v4l2_subdev_pad_config *cfg,
537 struct v4l2_subdev_mbus_code_enum *code)
538 {
539 if (code->pad || code->index >= ARRAY_SIZE(ov9640_codes))
540 return -EINVAL;
541
542 code->code = ov9640_codes[code->index];
543 return 0;
544 }
545
ov9640_get_selection(struct v4l2_subdev * sd,struct v4l2_subdev_pad_config * cfg,struct v4l2_subdev_selection * sel)546 static int ov9640_get_selection(struct v4l2_subdev *sd,
547 struct v4l2_subdev_pad_config *cfg,
548 struct v4l2_subdev_selection *sel)
549 {
550 if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
551 return -EINVAL;
552
553 sel->r.left = 0;
554 sel->r.top = 0;
555 switch (sel->target) {
556 case V4L2_SEL_TGT_CROP_BOUNDS:
557 case V4L2_SEL_TGT_CROP_DEFAULT:
558 case V4L2_SEL_TGT_CROP:
559 sel->r.width = W_SXGA;
560 sel->r.height = H_SXGA;
561 return 0;
562 default:
563 return -EINVAL;
564 }
565 }
566
ov9640_video_probe(struct i2c_client * client)567 static int ov9640_video_probe(struct i2c_client *client)
568 {
569 struct v4l2_subdev *sd = i2c_get_clientdata(client);
570 struct ov9640_priv *priv = to_ov9640_sensor(sd);
571 u8 pid, ver, midh, midl;
572 const char *devname;
573 int ret;
574
575 ret = ov9640_s_power(&priv->subdev, 1);
576 if (ret < 0)
577 return ret;
578
579 /*
580 * check and show product ID and manufacturer ID
581 */
582
583 ret = ov9640_reg_read(client, OV9640_PID, &pid);
584 if (!ret)
585 ret = ov9640_reg_read(client, OV9640_VER, &ver);
586 if (!ret)
587 ret = ov9640_reg_read(client, OV9640_MIDH, &midh);
588 if (!ret)
589 ret = ov9640_reg_read(client, OV9640_MIDL, &midl);
590 if (ret)
591 goto done;
592
593 switch (VERSION(pid, ver)) {
594 case OV9640_V2:
595 devname = "ov9640";
596 priv->revision = 2;
597 break;
598 case OV9640_V3:
599 devname = "ov9640";
600 priv->revision = 3;
601 break;
602 default:
603 dev_err(&client->dev, "Product ID error %x:%x\n", pid, ver);
604 ret = -ENODEV;
605 goto done;
606 }
607
608 dev_info(&client->dev, "%s Product ID %0x:%0x Manufacturer ID %x:%x\n",
609 devname, pid, ver, midh, midl);
610
611 ret = v4l2_ctrl_handler_setup(&priv->hdl);
612
613 done:
614 ov9640_s_power(&priv->subdev, 0);
615 return ret;
616 }
617
618 static const struct v4l2_ctrl_ops ov9640_ctrl_ops = {
619 .s_ctrl = ov9640_s_ctrl,
620 };
621
622 static const struct v4l2_subdev_core_ops ov9640_core_ops = {
623 #ifdef CONFIG_VIDEO_ADV_DEBUG
624 .g_register = ov9640_get_register,
625 .s_register = ov9640_set_register,
626 #endif
627 .s_power = ov9640_s_power,
628 };
629
630 /* Request bus settings on camera side */
ov9640_g_mbus_config(struct v4l2_subdev * sd,struct v4l2_mbus_config * cfg)631 static int ov9640_g_mbus_config(struct v4l2_subdev *sd,
632 struct v4l2_mbus_config *cfg)
633 {
634 struct i2c_client *client = v4l2_get_subdevdata(sd);
635 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
636
637 cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
638 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_HIGH |
639 V4L2_MBUS_DATA_ACTIVE_HIGH;
640 cfg->type = V4L2_MBUS_PARALLEL;
641 cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
642
643 return 0;
644 }
645
646 static const struct v4l2_subdev_video_ops ov9640_video_ops = {
647 .s_stream = ov9640_s_stream,
648 .g_mbus_config = ov9640_g_mbus_config,
649 };
650
651 static const struct v4l2_subdev_pad_ops ov9640_pad_ops = {
652 .enum_mbus_code = ov9640_enum_mbus_code,
653 .get_selection = ov9640_get_selection,
654 .set_fmt = ov9640_set_fmt,
655 };
656
657 static const struct v4l2_subdev_ops ov9640_subdev_ops = {
658 .core = &ov9640_core_ops,
659 .video = &ov9640_video_ops,
660 .pad = &ov9640_pad_ops,
661 };
662
663 /*
664 * i2c_driver function
665 */
ov9640_probe(struct i2c_client * client,const struct i2c_device_id * did)666 static int ov9640_probe(struct i2c_client *client,
667 const struct i2c_device_id *did)
668 {
669 struct ov9640_priv *priv;
670 struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
671 int ret;
672
673 if (!ssdd) {
674 dev_err(&client->dev, "Missing platform_data for driver\n");
675 return -EINVAL;
676 }
677
678 priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
679 if (!priv)
680 return -ENOMEM;
681
682 v4l2_i2c_subdev_init(&priv->subdev, client, &ov9640_subdev_ops);
683
684 v4l2_ctrl_handler_init(&priv->hdl, 2);
685 v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,
686 V4L2_CID_VFLIP, 0, 1, 1, 0);
687 v4l2_ctrl_new_std(&priv->hdl, &ov9640_ctrl_ops,
688 V4L2_CID_HFLIP, 0, 1, 1, 0);
689 priv->subdev.ctrl_handler = &priv->hdl;
690 if (priv->hdl.error)
691 return priv->hdl.error;
692
693 priv->clk = v4l2_clk_get(&client->dev, "mclk");
694 if (IS_ERR(priv->clk)) {
695 ret = PTR_ERR(priv->clk);
696 goto eclkget;
697 }
698
699 ret = ov9640_video_probe(client);
700 if (ret) {
701 v4l2_clk_put(priv->clk);
702 eclkget:
703 v4l2_ctrl_handler_free(&priv->hdl);
704 }
705
706 return ret;
707 }
708
ov9640_remove(struct i2c_client * client)709 static int ov9640_remove(struct i2c_client *client)
710 {
711 struct v4l2_subdev *sd = i2c_get_clientdata(client);
712 struct ov9640_priv *priv = to_ov9640_sensor(sd);
713
714 v4l2_clk_put(priv->clk);
715 v4l2_device_unregister_subdev(&priv->subdev);
716 v4l2_ctrl_handler_free(&priv->hdl);
717 return 0;
718 }
719
720 static const struct i2c_device_id ov9640_id[] = {
721 { "ov9640", 0 },
722 { }
723 };
724 MODULE_DEVICE_TABLE(i2c, ov9640_id);
725
726 static struct i2c_driver ov9640_i2c_driver = {
727 .driver = {
728 .name = "ov9640",
729 },
730 .probe = ov9640_probe,
731 .remove = ov9640_remove,
732 .id_table = ov9640_id,
733 };
734
735 module_i2c_driver(ov9640_i2c_driver);
736
737 MODULE_DESCRIPTION("SoC Camera driver for OmniVision OV96xx");
738 MODULE_AUTHOR("Marek Vasut <marek.vasut@gmail.com>");
739 MODULE_LICENSE("GPL v2");
740
