1 /*
2 * Driver for SiliconFile SR030PC30 VGA (1/10-Inch) Image Sensor with ISP
3 *
4 * Copyright (C) 2010 Samsung Electronics Co., Ltd
5 * Author: Sylwester Nawrocki, s.nawrocki@samsung.com
6 *
7 * Based on original driver authored by Dongsoo Nathaniel Kim
8 * and HeungJun Kim <riverful.kim@samsung.com>.
9 *
10 * Based on mt9v011 Micron Digital Image Sensor driver
11 * Copyright (c) 2009 Mauro Carvalho Chehab (mchehab@redhat.com)
12 *
13 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 */
18
19 #include <linux/i2c.h>
20 #include <linux/delay.h>
21 #include <linux/slab.h>
22 #include <linux/module.h>
23 #include <media/v4l2-device.h>
24 #include <media/v4l2-subdev.h>
25 #include <media/v4l2-mediabus.h>
26 #include <media/sr030pc30.h>
27
28 static int debug;
29 module_param(debug, int, 0644);
30
31 #define MODULE_NAME "SR030PC30"
32
33 /*
34 * Register offsets within a page
35 * b15..b8 - page id, b7..b0 - register address
36 */
37 #define POWER_CTRL_REG 0x0001
38 #define PAGEMODE_REG 0x03
39 #define DEVICE_ID_REG 0x0004
40 #define NOON010PC30_ID 0x86
41 #define SR030PC30_ID 0x8C
42 #define VDO_CTL1_REG 0x0010
43 #define SUBSAMPL_NONE_VGA 0
44 #define SUBSAMPL_QVGA 0x10
45 #define SUBSAMPL_QQVGA 0x20
46 #define VDO_CTL2_REG 0x0011
47 #define SYNC_CTL_REG 0x0012
48 #define WIN_ROWH_REG 0x0020
49 #define WIN_ROWL_REG 0x0021
50 #define WIN_COLH_REG 0x0022
51 #define WIN_COLL_REG 0x0023
52 #define WIN_HEIGHTH_REG 0x0024
53 #define WIN_HEIGHTL_REG 0x0025
54 #define WIN_WIDTHH_REG 0x0026
55 #define WIN_WIDTHL_REG 0x0027
56 #define HBLANKH_REG 0x0040
57 #define HBLANKL_REG 0x0041
58 #define VSYNCH_REG 0x0042
59 #define VSYNCL_REG 0x0043
60 /* page 10 */
61 #define ISP_CTL_REG(n) (0x1010 + (n))
62 #define YOFS_REG 0x1040
63 #define DARK_YOFS_REG 0x1041
64 #define AG_ABRTH_REG 0x1050
65 #define SAT_CTL_REG 0x1060
66 #define BSAT_REG 0x1061
67 #define RSAT_REG 0x1062
68 #define AG_SAT_TH_REG 0x1063
69 /* page 11 */
70 #define ZLPF_CTRL_REG 0x1110
71 #define ZLPF_CTRL2_REG 0x1112
72 #define ZLPF_AGH_THR_REG 0x1121
73 #define ZLPF_THR_REG 0x1160
74 #define ZLPF_DYN_THR_REG 0x1160
75 /* page 12 */
76 #define YCLPF_CTL1_REG 0x1240
77 #define YCLPF_CTL2_REG 0x1241
78 #define YCLPF_THR_REG 0x1250
79 #define BLPF_CTL_REG 0x1270
80 #define BLPF_THR1_REG 0x1274
81 #define BLPF_THR2_REG 0x1275
82 /* page 14 - Lens Shading Compensation */
83 #define LENS_CTRL_REG 0x1410
84 #define LENS_XCEN_REG 0x1420
85 #define LENS_YCEN_REG 0x1421
86 #define LENS_R_COMP_REG 0x1422
87 #define LENS_G_COMP_REG 0x1423
88 #define LENS_B_COMP_REG 0x1424
89 /* page 15 - Color correction */
90 #define CMC_CTL_REG 0x1510
91 #define CMC_OFSGH_REG 0x1514
92 #define CMC_OFSGL_REG 0x1516
93 #define CMC_SIGN_REG 0x1517
94 /* Color correction coefficients */
95 #define CMC_COEF_REG(n) (0x1530 + (n))
96 /* Color correction offset coefficients */
97 #define CMC_OFS_REG(n) (0x1540 + (n))
98 /* page 16 - Gamma correction */
99 #define GMA_CTL_REG 0x1610
100 /* Gamma correction coefficients 0.14 */
101 #define GMA_COEF_REG(n) (0x1630 + (n))
102 /* page 20 - Auto Exposure */
103 #define AE_CTL1_REG 0x2010
104 #define AE_CTL2_REG 0x2011
105 #define AE_FRM_CTL_REG 0x2020
106 #define AE_FINE_CTL_REG(n) (0x2028 + (n))
107 #define EXP_TIMEH_REG 0x2083
108 #define EXP_TIMEM_REG 0x2084
109 #define EXP_TIMEL_REG 0x2085
110 #define EXP_MMINH_REG 0x2086
111 #define EXP_MMINL_REG 0x2087
112 #define EXP_MMAXH_REG 0x2088
113 #define EXP_MMAXM_REG 0x2089
114 #define EXP_MMAXL_REG 0x208A
115 /* page 22 - Auto White Balance */
116 #define AWB_CTL1_REG 0x2210
117 #define AWB_ENABLE 0x80
118 #define AWB_CTL2_REG 0x2211
119 #define MWB_ENABLE 0x01
120 /* RGB gain control (manual WB) when AWB_CTL1[7]=0 */
121 #define AWB_RGAIN_REG 0x2280
122 #define AWB_GGAIN_REG 0x2281
123 #define AWB_BGAIN_REG 0x2282
124 #define AWB_RMAX_REG 0x2283
125 #define AWB_RMIN_REG 0x2284
126 #define AWB_BMAX_REG 0x2285
127 #define AWB_BMIN_REG 0x2286
128 /* R, B gain range in bright light conditions */
129 #define AWB_RMAXB_REG 0x2287
130 #define AWB_RMINB_REG 0x2288
131 #define AWB_BMAXB_REG 0x2289
132 #define AWB_BMINB_REG 0x228A
133 /* manual white balance, when AWB_CTL2[0]=1 */
134 #define MWB_RGAIN_REG 0x22B2
135 #define MWB_BGAIN_REG 0x22B3
136 /* the token to mark an array end */
137 #define REG_TERM 0xFFFF
138
139 /* Minimum and maximum exposure time in ms */
140 #define EXPOS_MIN_MS 1
141 #define EXPOS_MAX_MS 125
142
143 struct sr030pc30_info {
144 struct v4l2_subdev sd;
145 const struct sr030pc30_platform_data *pdata;
146 const struct sr030pc30_format *curr_fmt;
147 const struct sr030pc30_frmsize *curr_win;
148 unsigned int auto_wb:1;
149 unsigned int auto_exp:1;
150 unsigned int hflip:1;
151 unsigned int vflip:1;
152 unsigned int sleep:1;
153 unsigned int exposure;
154 u8 blue_balance;
155 u8 red_balance;
156 u8 i2c_reg_page;
157 };
158
159 struct sr030pc30_format {
160 enum v4l2_mbus_pixelcode code;
161 enum v4l2_colorspace colorspace;
162 u16 ispctl1_reg;
163 };
164
165 struct sr030pc30_frmsize {
166 u16 width;
167 u16 height;
168 int vid_ctl1;
169 };
170
171 struct i2c_regval {
172 u16 addr;
173 u16 val;
174 };
175
176 static const struct v4l2_queryctrl sr030pc30_ctrl[] = {
177 {
178 .id = V4L2_CID_AUTO_WHITE_BALANCE,
179 .type = V4L2_CTRL_TYPE_BOOLEAN,
180 .name = "Auto White Balance",
181 .minimum = 0,
182 .maximum = 1,
183 .step = 1,
184 .default_value = 1,
185 }, {
186 .id = V4L2_CID_RED_BALANCE,
187 .type = V4L2_CTRL_TYPE_INTEGER,
188 .name = "Red Balance",
189 .minimum = 0,
190 .maximum = 127,
191 .step = 1,
192 .default_value = 64,
193 .flags = 0,
194 }, {
195 .id = V4L2_CID_BLUE_BALANCE,
196 .type = V4L2_CTRL_TYPE_INTEGER,
197 .name = "Blue Balance",
198 .minimum = 0,
199 .maximum = 127,
200 .step = 1,
201 .default_value = 64,
202 }, {
203 .id = V4L2_CID_EXPOSURE_AUTO,
204 .type = V4L2_CTRL_TYPE_INTEGER,
205 .name = "Auto Exposure",
206 .minimum = 0,
207 .maximum = 1,
208 .step = 1,
209 .default_value = 1,
210 }, {
211 .id = V4L2_CID_EXPOSURE,
212 .type = V4L2_CTRL_TYPE_INTEGER,
213 .name = "Exposure",
214 .minimum = EXPOS_MIN_MS,
215 .maximum = EXPOS_MAX_MS,
216 .step = 1,
217 .default_value = 1,
218 }, {
219 }
220 };
221
222 /* supported resolutions */
223 static const struct sr030pc30_frmsize sr030pc30_sizes[] = {
224 {
225 .width = 640,
226 .height = 480,
227 .vid_ctl1 = SUBSAMPL_NONE_VGA,
228 }, {
229 .width = 320,
230 .height = 240,
231 .vid_ctl1 = SUBSAMPL_QVGA,
232 }, {
233 .width = 160,
234 .height = 120,
235 .vid_ctl1 = SUBSAMPL_QQVGA,
236 },
237 };
238
239 /* supported pixel formats */
240 static const struct sr030pc30_format sr030pc30_formats[] = {
241 {
242 .code = V4L2_MBUS_FMT_YUYV8_2X8,
243 .colorspace = V4L2_COLORSPACE_JPEG,
244 .ispctl1_reg = 0x03,
245 }, {
246 .code = V4L2_MBUS_FMT_YVYU8_2X8,
247 .colorspace = V4L2_COLORSPACE_JPEG,
248 .ispctl1_reg = 0x02,
249 }, {
250 .code = V4L2_MBUS_FMT_VYUY8_2X8,
251 .colorspace = V4L2_COLORSPACE_JPEG,
252 .ispctl1_reg = 0,
253 }, {
254 .code = V4L2_MBUS_FMT_UYVY8_2X8,
255 .colorspace = V4L2_COLORSPACE_JPEG,
256 .ispctl1_reg = 0x01,
257 }, {
258 .code = V4L2_MBUS_FMT_RGB565_2X8_BE,
259 .colorspace = V4L2_COLORSPACE_JPEG,
260 .ispctl1_reg = 0x40,
261 },
262 };
263
264 static const struct i2c_regval sr030pc30_base_regs[] = {
265 /* Window size and position within pixel matrix */
266 { WIN_ROWH_REG, 0x00 }, { WIN_ROWL_REG, 0x06 },
267 { WIN_COLH_REG, 0x00 }, { WIN_COLL_REG, 0x06 },
268 { WIN_HEIGHTH_REG, 0x01 }, { WIN_HEIGHTL_REG, 0xE0 },
269 { WIN_WIDTHH_REG, 0x02 }, { WIN_WIDTHL_REG, 0x80 },
270 { HBLANKH_REG, 0x01 }, { HBLANKL_REG, 0x50 },
271 { VSYNCH_REG, 0x00 }, { VSYNCL_REG, 0x14 },
272 { SYNC_CTL_REG, 0 },
273 /* Color corection and saturation */
274 { ISP_CTL_REG(0), 0x30 }, { YOFS_REG, 0x80 },
275 { DARK_YOFS_REG, 0x04 }, { AG_ABRTH_REG, 0x78 },
276 { SAT_CTL_REG, 0x1F }, { BSAT_REG, 0x90 },
277 { AG_SAT_TH_REG, 0xF0 }, { 0x1064, 0x80 },
278 { CMC_CTL_REG, 0x03 }, { CMC_OFSGH_REG, 0x3C },
279 { CMC_OFSGL_REG, 0x2C }, { CMC_SIGN_REG, 0x2F },
280 { CMC_COEF_REG(0), 0xCB }, { CMC_OFS_REG(0), 0x87 },
281 { CMC_COEF_REG(1), 0x61 }, { CMC_OFS_REG(1), 0x18 },
282 { CMC_COEF_REG(2), 0x16 }, { CMC_OFS_REG(2), 0x91 },
283 { CMC_COEF_REG(3), 0x23 }, { CMC_OFS_REG(3), 0x94 },
284 { CMC_COEF_REG(4), 0xCE }, { CMC_OFS_REG(4), 0x9f },
285 { CMC_COEF_REG(5), 0x2B }, { CMC_OFS_REG(5), 0x33 },
286 { CMC_COEF_REG(6), 0x01 }, { CMC_OFS_REG(6), 0x00 },
287 { CMC_COEF_REG(7), 0x34 }, { CMC_OFS_REG(7), 0x94 },
288 { CMC_COEF_REG(8), 0x75 }, { CMC_OFS_REG(8), 0x14 },
289 /* Color corection coefficients */
290 { GMA_CTL_REG, 0x03 }, { GMA_COEF_REG(0), 0x00 },
291 { GMA_COEF_REG(1), 0x19 }, { GMA_COEF_REG(2), 0x26 },
292 { GMA_COEF_REG(3), 0x3B }, { GMA_COEF_REG(4), 0x5D },
293 { GMA_COEF_REG(5), 0x79 }, { GMA_COEF_REG(6), 0x8E },
294 { GMA_COEF_REG(7), 0x9F }, { GMA_COEF_REG(8), 0xAF },
295 { GMA_COEF_REG(9), 0xBD }, { GMA_COEF_REG(10), 0xCA },
296 { GMA_COEF_REG(11), 0xDD }, { GMA_COEF_REG(12), 0xEC },
297 { GMA_COEF_REG(13), 0xF7 }, { GMA_COEF_REG(14), 0xFF },
298 /* Noise reduction, Z-LPF, YC-LPF and BLPF filters setup */
299 { ZLPF_CTRL_REG, 0x99 }, { ZLPF_CTRL2_REG, 0x0E },
300 { ZLPF_AGH_THR_REG, 0x29 }, { ZLPF_THR_REG, 0x0F },
301 { ZLPF_DYN_THR_REG, 0x63 }, { YCLPF_CTL1_REG, 0x23 },
302 { YCLPF_CTL2_REG, 0x3B }, { YCLPF_THR_REG, 0x05 },
303 { BLPF_CTL_REG, 0x1D }, { BLPF_THR1_REG, 0x05 },
304 { BLPF_THR2_REG, 0x04 },
305 /* Automatic white balance */
306 { AWB_CTL1_REG, 0xFB }, { AWB_CTL2_REG, 0x26 },
307 { AWB_RMAX_REG, 0x54 }, { AWB_RMIN_REG, 0x2B },
308 { AWB_BMAX_REG, 0x57 }, { AWB_BMIN_REG, 0x29 },
309 { AWB_RMAXB_REG, 0x50 }, { AWB_RMINB_REG, 0x43 },
310 { AWB_BMAXB_REG, 0x30 }, { AWB_BMINB_REG, 0x22 },
311 /* Auto exposure */
312 { AE_CTL1_REG, 0x8C }, { AE_CTL2_REG, 0x04 },
313 { AE_FRM_CTL_REG, 0x01 }, { AE_FINE_CTL_REG(0), 0x3F },
314 { AE_FINE_CTL_REG(1), 0xA3 }, { AE_FINE_CTL_REG(3), 0x34 },
315 /* Lens shading compensation */
316 { LENS_CTRL_REG, 0x01 }, { LENS_XCEN_REG, 0x80 },
317 { LENS_YCEN_REG, 0x70 }, { LENS_R_COMP_REG, 0x53 },
318 { LENS_G_COMP_REG, 0x40 }, { LENS_B_COMP_REG, 0x3e },
319 { REG_TERM, 0 },
320 };
321
to_sr030pc30(struct v4l2_subdev * sd)322 static inline struct sr030pc30_info *to_sr030pc30(struct v4l2_subdev *sd)
323 {
324 return container_of(sd, struct sr030pc30_info, sd);
325 }
326
set_i2c_page(struct sr030pc30_info * info,struct i2c_client * client,unsigned int reg)327 static inline int set_i2c_page(struct sr030pc30_info *info,
328 struct i2c_client *client, unsigned int reg)
329 {
330 int ret = 0;
331 u32 page = reg >> 8 & 0xFF;
332
333 if (info->i2c_reg_page != page && (reg & 0xFF) != 0x03) {
334 ret = i2c_smbus_write_byte_data(client, PAGEMODE_REG, page);
335 if (!ret)
336 info->i2c_reg_page = page;
337 }
338 return ret;
339 }
340
cam_i2c_read(struct v4l2_subdev * sd,u32 reg_addr)341 static int cam_i2c_read(struct v4l2_subdev *sd, u32 reg_addr)
342 {
343 struct i2c_client *client = v4l2_get_subdevdata(sd);
344 struct sr030pc30_info *info = to_sr030pc30(sd);
345
346 int ret = set_i2c_page(info, client, reg_addr);
347 if (!ret)
348 ret = i2c_smbus_read_byte_data(client, reg_addr & 0xFF);
349 return ret;
350 }
351
cam_i2c_write(struct v4l2_subdev * sd,u32 reg_addr,u32 val)352 static int cam_i2c_write(struct v4l2_subdev *sd, u32 reg_addr, u32 val)
353 {
354 struct i2c_client *client = v4l2_get_subdevdata(sd);
355 struct sr030pc30_info *info = to_sr030pc30(sd);
356
357 int ret = set_i2c_page(info, client, reg_addr);
358 if (!ret)
359 ret = i2c_smbus_write_byte_data(
360 client, reg_addr & 0xFF, val);
361 return ret;
362 }
363
sr030pc30_bulk_write_reg(struct v4l2_subdev * sd,const struct i2c_regval * msg)364 static inline int sr030pc30_bulk_write_reg(struct v4l2_subdev *sd,
365 const struct i2c_regval *msg)
366 {
367 while (msg->addr != REG_TERM) {
368 int ret = cam_i2c_write(sd, msg->addr, msg->val);
369 if (ret)
370 return ret;
371 msg++;
372 }
373 return 0;
374 }
375
376 /* Device reset and sleep mode control */
sr030pc30_pwr_ctrl(struct v4l2_subdev * sd,bool reset,bool sleep)377 static int sr030pc30_pwr_ctrl(struct v4l2_subdev *sd,
378 bool reset, bool sleep)
379 {
380 struct sr030pc30_info *info = to_sr030pc30(sd);
381 u8 reg = sleep ? 0xF1 : 0xF0;
382 int ret = 0;
383
384 if (reset)
385 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg | 0x02);
386 if (!ret) {
387 ret = cam_i2c_write(sd, POWER_CTRL_REG, reg);
388 if (!ret) {
389 info->sleep = sleep;
390 if (reset)
391 info->i2c_reg_page = -1;
392 }
393 }
394 return ret;
395 }
396
sr030pc30_enable_autoexposure(struct v4l2_subdev * sd,int on)397 static inline int sr030pc30_enable_autoexposure(struct v4l2_subdev *sd, int on)
398 {
399 struct sr030pc30_info *info = to_sr030pc30(sd);
400 /* auto anti-flicker is also enabled here */
401 int ret = cam_i2c_write(sd, AE_CTL1_REG, on ? 0xDC : 0x0C);
402 if (!ret)
403 info->auto_exp = on;
404 return ret;
405 }
406
sr030pc30_set_exposure(struct v4l2_subdev * sd,int value)407 static int sr030pc30_set_exposure(struct v4l2_subdev *sd, int value)
408 {
409 struct sr030pc30_info *info = to_sr030pc30(sd);
410
411 unsigned long expos = value * info->pdata->clk_rate / (8 * 1000);
412
413 int ret = cam_i2c_write(sd, EXP_TIMEH_REG, expos >> 16 & 0xFF);
414 if (!ret)
415 ret = cam_i2c_write(sd, EXP_TIMEM_REG, expos >> 8 & 0xFF);
416 if (!ret)
417 ret = cam_i2c_write(sd, EXP_TIMEL_REG, expos & 0xFF);
418 if (!ret) { /* Turn off AE */
419 info->exposure = value;
420 ret = sr030pc30_enable_autoexposure(sd, 0);
421 }
422 return ret;
423 }
424
425 /* Automatic white balance control */
sr030pc30_enable_autowhitebalance(struct v4l2_subdev * sd,int on)426 static int sr030pc30_enable_autowhitebalance(struct v4l2_subdev *sd, int on)
427 {
428 struct sr030pc30_info *info = to_sr030pc30(sd);
429
430 int ret = cam_i2c_write(sd, AWB_CTL2_REG, on ? 0x2E : 0x2F);
431 if (!ret)
432 ret = cam_i2c_write(sd, AWB_CTL1_REG, on ? 0xFB : 0x7B);
433 if (!ret)
434 info->auto_wb = on;
435
436 return ret;
437 }
438
sr030pc30_set_flip(struct v4l2_subdev * sd)439 static int sr030pc30_set_flip(struct v4l2_subdev *sd)
440 {
441 struct sr030pc30_info *info = to_sr030pc30(sd);
442
443 s32 reg = cam_i2c_read(sd, VDO_CTL2_REG);
444 if (reg < 0)
445 return reg;
446
447 reg &= 0x7C;
448 if (info->hflip)
449 reg |= 0x01;
450 if (info->vflip)
451 reg |= 0x02;
452 return cam_i2c_write(sd, VDO_CTL2_REG, reg | 0x80);
453 }
454
455 /* Configure resolution, color format and image flip */
sr030pc30_set_params(struct v4l2_subdev * sd)456 static int sr030pc30_set_params(struct v4l2_subdev *sd)
457 {
458 struct sr030pc30_info *info = to_sr030pc30(sd);
459 int ret;
460
461 if (!info->curr_win)
462 return -EINVAL;
463
464 /* Configure the resolution through subsampling */
465 ret = cam_i2c_write(sd, VDO_CTL1_REG,
466 info->curr_win->vid_ctl1);
467
468 if (!ret && info->curr_fmt)
469 ret = cam_i2c_write(sd, ISP_CTL_REG(0),
470 info->curr_fmt->ispctl1_reg);
471 if (!ret)
472 ret = sr030pc30_set_flip(sd);
473
474 return ret;
475 }
476
477 /* Find nearest matching image pixel size. */
sr030pc30_try_frame_size(struct v4l2_mbus_framefmt * mf)478 static int sr030pc30_try_frame_size(struct v4l2_mbus_framefmt *mf)
479 {
480 unsigned int min_err = ~0;
481 int i = ARRAY_SIZE(sr030pc30_sizes);
482 const struct sr030pc30_frmsize *fsize = &sr030pc30_sizes[0],
483 *match = NULL;
484 while (i--) {
485 int err = abs(fsize->width - mf->width)
486 + abs(fsize->height - mf->height);
487 if (err < min_err) {
488 min_err = err;
489 match = fsize;
490 }
491 fsize++;
492 }
493 if (match) {
494 mf->width = match->width;
495 mf->height = match->height;
496 return 0;
497 }
498 return -EINVAL;
499 }
500
sr030pc30_queryctrl(struct v4l2_subdev * sd,struct v4l2_queryctrl * qc)501 static int sr030pc30_queryctrl(struct v4l2_subdev *sd,
502 struct v4l2_queryctrl *qc)
503 {
504 int i;
505
506 for (i = 0; i < ARRAY_SIZE(sr030pc30_ctrl); i++)
507 if (qc->id == sr030pc30_ctrl[i].id) {
508 *qc = sr030pc30_ctrl[i];
509 v4l2_dbg(1, debug, sd, "%s id: %d\n",
510 __func__, qc->id);
511 return 0;
512 }
513
514 return -EINVAL;
515 }
516
sr030pc30_set_bluebalance(struct v4l2_subdev * sd,int value)517 static inline int sr030pc30_set_bluebalance(struct v4l2_subdev *sd, int value)
518 {
519 int ret = cam_i2c_write(sd, MWB_BGAIN_REG, value);
520 if (!ret)
521 to_sr030pc30(sd)->blue_balance = value;
522 return ret;
523 }
524
sr030pc30_set_redbalance(struct v4l2_subdev * sd,int value)525 static inline int sr030pc30_set_redbalance(struct v4l2_subdev *sd, int value)
526 {
527 int ret = cam_i2c_write(sd, MWB_RGAIN_REG, value);
528 if (!ret)
529 to_sr030pc30(sd)->red_balance = value;
530 return ret;
531 }
532
sr030pc30_s_ctrl(struct v4l2_subdev * sd,struct v4l2_control * ctrl)533 static int sr030pc30_s_ctrl(struct v4l2_subdev *sd,
534 struct v4l2_control *ctrl)
535 {
536 int i, ret = 0;
537
538 for (i = 0; i < ARRAY_SIZE(sr030pc30_ctrl); i++)
539 if (ctrl->id == sr030pc30_ctrl[i].id)
540 break;
541
542 if (i == ARRAY_SIZE(sr030pc30_ctrl))
543 return -EINVAL;
544
545 if (ctrl->value < sr030pc30_ctrl[i].minimum ||
546 ctrl->value > sr030pc30_ctrl[i].maximum)
547 return -ERANGE;
548
549 v4l2_dbg(1, debug, sd, "%s: ctrl_id: %d, value: %d\n",
550 __func__, ctrl->id, ctrl->value);
551
552 switch (ctrl->id) {
553 case V4L2_CID_AUTO_WHITE_BALANCE:
554 sr030pc30_enable_autowhitebalance(sd, ctrl->value);
555 break;
556 case V4L2_CID_BLUE_BALANCE:
557 ret = sr030pc30_set_bluebalance(sd, ctrl->value);
558 break;
559 case V4L2_CID_RED_BALANCE:
560 ret = sr030pc30_set_redbalance(sd, ctrl->value);
561 break;
562 case V4L2_CID_EXPOSURE_AUTO:
563 sr030pc30_enable_autoexposure(sd,
564 ctrl->value == V4L2_EXPOSURE_AUTO);
565 break;
566 case V4L2_CID_EXPOSURE:
567 ret = sr030pc30_set_exposure(sd, ctrl->value);
568 break;
569 default:
570 return -EINVAL;
571 }
572
573 return ret;
574 }
575
sr030pc30_g_ctrl(struct v4l2_subdev * sd,struct v4l2_control * ctrl)576 static int sr030pc30_g_ctrl(struct v4l2_subdev *sd,
577 struct v4l2_control *ctrl)
578 {
579 struct sr030pc30_info *info = to_sr030pc30(sd);
580
581 v4l2_dbg(1, debug, sd, "%s: id: %d\n", __func__, ctrl->id);
582
583 switch (ctrl->id) {
584 case V4L2_CID_AUTO_WHITE_BALANCE:
585 ctrl->value = info->auto_wb;
586 break;
587 case V4L2_CID_BLUE_BALANCE:
588 ctrl->value = info->blue_balance;
589 break;
590 case V4L2_CID_RED_BALANCE:
591 ctrl->value = info->red_balance;
592 break;
593 case V4L2_CID_EXPOSURE_AUTO:
594 ctrl->value = info->auto_exp;
595 break;
596 case V4L2_CID_EXPOSURE:
597 ctrl->value = info->exposure;
598 break;
599 default:
600 return -EINVAL;
601 }
602 return 0;
603 }
604
sr030pc30_enum_fmt(struct v4l2_subdev * sd,unsigned int index,enum v4l2_mbus_pixelcode * code)605 static int sr030pc30_enum_fmt(struct v4l2_subdev *sd, unsigned int index,
606 enum v4l2_mbus_pixelcode *code)
607 {
608 if (!code || index >= ARRAY_SIZE(sr030pc30_formats))
609 return -EINVAL;
610
611 *code = sr030pc30_formats[index].code;
612 return 0;
613 }
614
sr030pc30_g_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)615 static int sr030pc30_g_fmt(struct v4l2_subdev *sd,
616 struct v4l2_mbus_framefmt *mf)
617 {
618 struct sr030pc30_info *info = to_sr030pc30(sd);
619 int ret;
620
621 if (!mf)
622 return -EINVAL;
623
624 if (!info->curr_win || !info->curr_fmt) {
625 ret = sr030pc30_set_params(sd);
626 if (ret)
627 return ret;
628 }
629
630 mf->width = info->curr_win->width;
631 mf->height = info->curr_win->height;
632 mf->code = info->curr_fmt->code;
633 mf->colorspace = info->curr_fmt->colorspace;
634 mf->field = V4L2_FIELD_NONE;
635
636 return 0;
637 }
638
639 /* Return nearest media bus frame format. */
try_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)640 static const struct sr030pc30_format *try_fmt(struct v4l2_subdev *sd,
641 struct v4l2_mbus_framefmt *mf)
642 {
643 int i = ARRAY_SIZE(sr030pc30_formats);
644
645 sr030pc30_try_frame_size(mf);
646
647 while (i--)
648 if (mf->code == sr030pc30_formats[i].code)
649 break;
650
651 mf->code = sr030pc30_formats[i].code;
652
653 return &sr030pc30_formats[i];
654 }
655
656 /* Return nearest media bus frame format. */
sr030pc30_try_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)657 static int sr030pc30_try_fmt(struct v4l2_subdev *sd,
658 struct v4l2_mbus_framefmt *mf)
659 {
660 if (!sd || !mf)
661 return -EINVAL;
662
663 try_fmt(sd, mf);
664 return 0;
665 }
666
sr030pc30_s_fmt(struct v4l2_subdev * sd,struct v4l2_mbus_framefmt * mf)667 static int sr030pc30_s_fmt(struct v4l2_subdev *sd,
668 struct v4l2_mbus_framefmt *mf)
669 {
670 struct sr030pc30_info *info = to_sr030pc30(sd);
671
672 if (!sd || !mf)
673 return -EINVAL;
674
675 info->curr_fmt = try_fmt(sd, mf);
676
677 return sr030pc30_set_params(sd);
678 }
679
sr030pc30_base_config(struct v4l2_subdev * sd)680 static int sr030pc30_base_config(struct v4l2_subdev *sd)
681 {
682 struct sr030pc30_info *info = to_sr030pc30(sd);
683 int ret;
684 unsigned long expmin, expmax;
685
686 ret = sr030pc30_bulk_write_reg(sd, sr030pc30_base_regs);
687 if (!ret) {
688 info->curr_fmt = &sr030pc30_formats[0];
689 info->curr_win = &sr030pc30_sizes[0];
690 ret = sr030pc30_set_params(sd);
691 }
692 if (!ret)
693 ret = sr030pc30_pwr_ctrl(sd, false, false);
694
695 if (!ret && !info->pdata)
696 return ret;
697
698 expmin = EXPOS_MIN_MS * info->pdata->clk_rate / (8 * 1000);
699 expmax = EXPOS_MAX_MS * info->pdata->clk_rate / (8 * 1000);
700
701 v4l2_dbg(1, debug, sd, "%s: expmin= %lx, expmax= %lx", __func__,
702 expmin, expmax);
703
704 /* Setting up manual exposure time range */
705 ret = cam_i2c_write(sd, EXP_MMINH_REG, expmin >> 8 & 0xFF);
706 if (!ret)
707 ret = cam_i2c_write(sd, EXP_MMINL_REG, expmin & 0xFF);
708 if (!ret)
709 ret = cam_i2c_write(sd, EXP_MMAXH_REG, expmax >> 16 & 0xFF);
710 if (!ret)
711 ret = cam_i2c_write(sd, EXP_MMAXM_REG, expmax >> 8 & 0xFF);
712 if (!ret)
713 ret = cam_i2c_write(sd, EXP_MMAXL_REG, expmax & 0xFF);
714
715 return ret;
716 }
717
sr030pc30_s_power(struct v4l2_subdev * sd,int on)718 static int sr030pc30_s_power(struct v4l2_subdev *sd, int on)
719 {
720 struct i2c_client *client = v4l2_get_subdevdata(sd);
721 struct sr030pc30_info *info = to_sr030pc30(sd);
722 const struct sr030pc30_platform_data *pdata = info->pdata;
723 int ret;
724
725 if (pdata == NULL) {
726 WARN(1, "No platform data!\n");
727 return -EINVAL;
728 }
729
730 /*
731 * Put sensor into power sleep mode before switching off
732 * power and disabling MCLK.
733 */
734 if (!on)
735 sr030pc30_pwr_ctrl(sd, false, true);
736
737 /* set_power controls sensor's power and clock */
738 if (pdata->set_power) {
739 ret = pdata->set_power(&client->dev, on);
740 if (ret)
741 return ret;
742 }
743
744 if (on) {
745 ret = sr030pc30_base_config(sd);
746 } else {
747 ret = 0;
748 info->curr_win = NULL;
749 info->curr_fmt = NULL;
750 }
751
752 return ret;
753 }
754
755 static const struct v4l2_subdev_core_ops sr030pc30_core_ops = {
756 .s_power = sr030pc30_s_power,
757 .queryctrl = sr030pc30_queryctrl,
758 .s_ctrl = sr030pc30_s_ctrl,
759 .g_ctrl = sr030pc30_g_ctrl,
760 };
761
762 static const struct v4l2_subdev_video_ops sr030pc30_video_ops = {
763 .g_mbus_fmt = sr030pc30_g_fmt,
764 .s_mbus_fmt = sr030pc30_s_fmt,
765 .try_mbus_fmt = sr030pc30_try_fmt,
766 .enum_mbus_fmt = sr030pc30_enum_fmt,
767 };
768
769 static const struct v4l2_subdev_ops sr030pc30_ops = {
770 .core = &sr030pc30_core_ops,
771 .video = &sr030pc30_video_ops,
772 };
773
774 /*
775 * Detect sensor type. Return 0 if SR030PC30 was detected
776 * or -ENODEV otherwise.
777 */
sr030pc30_detect(struct i2c_client * client)778 static int sr030pc30_detect(struct i2c_client *client)
779 {
780 const struct sr030pc30_platform_data *pdata
781 = client->dev.platform_data;
782 int ret;
783
784 /* Enable sensor's power and clock */
785 if (pdata->set_power) {
786 ret = pdata->set_power(&client->dev, 1);
787 if (ret)
788 return ret;
789 }
790
791 ret = i2c_smbus_read_byte_data(client, DEVICE_ID_REG);
792
793 if (pdata->set_power)
794 pdata->set_power(&client->dev, 0);
795
796 if (ret < 0) {
797 dev_err(&client->dev, "%s: I2C read failed\n", __func__);
798 return ret;
799 }
800
801 return ret == SR030PC30_ID ? 0 : -ENODEV;
802 }
803
804
sr030pc30_probe(struct i2c_client * client,const struct i2c_device_id * id)805 static int sr030pc30_probe(struct i2c_client *client,
806 const struct i2c_device_id *id)
807 {
808 struct sr030pc30_info *info;
809 struct v4l2_subdev *sd;
810 const struct sr030pc30_platform_data *pdata
811 = client->dev.platform_data;
812 int ret;
813
814 if (!pdata) {
815 dev_err(&client->dev, "No platform data!");
816 return -EIO;
817 }
818
819 ret = sr030pc30_detect(client);
820 if (ret)
821 return ret;
822
823 info = kzalloc(sizeof(*info), GFP_KERNEL);
824 if (!info)
825 return -ENOMEM;
826
827 sd = &info->sd;
828 strcpy(sd->name, MODULE_NAME);
829 info->pdata = client->dev.platform_data;
830
831 v4l2_i2c_subdev_init(sd, client, &sr030pc30_ops);
832
833 info->i2c_reg_page = -1;
834 info->hflip = 1;
835 info->auto_exp = 1;
836 info->exposure = 30;
837
838 return 0;
839 }
840
sr030pc30_remove(struct i2c_client * client)841 static int sr030pc30_remove(struct i2c_client *client)
842 {
843 struct v4l2_subdev *sd = i2c_get_clientdata(client);
844 struct sr030pc30_info *info = to_sr030pc30(sd);
845
846 v4l2_device_unregister_subdev(sd);
847 kfree(info);
848 return 0;
849 }
850
851 static const struct i2c_device_id sr030pc30_id[] = {
852 { MODULE_NAME, 0 },
853 { },
854 };
855 MODULE_DEVICE_TABLE(i2c, sr030pc30_id);
856
857
858 static struct i2c_driver sr030pc30_i2c_driver = {
859 .driver = {
860 .name = MODULE_NAME
861 },
862 .probe = sr030pc30_probe,
863 .remove = sr030pc30_remove,
864 .id_table = sr030pc30_id,
865 };
866
867 module_i2c_driver(sr030pc30_i2c_driver);
868
869 MODULE_DESCRIPTION("Siliconfile SR030PC30 camera driver");
870 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
871 MODULE_LICENSE("GPL");
872