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a5e90862
SA		 1/*
2 * drivers/media/video/tcm825x.c
3 *
4 * TCM825X camera sensor driver.
5 *
6 * Copyright (C) 2007 Nokia Corporation.
7 *
8 * Contact: Sakari Ailus <sakari.ailus@nokia.com>
9 *
10 * Based on code from David Cohen <david.cohen@indt.org.br>
11 *
12 * This driver was based on ov9640 sensor driver from MontaVista
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License
16 * version 2 as published by the Free Software Foundation.
17 *
18 * This program is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
26 * 02110-1301 USA
27 */
28
29#include <linux/i2c.h>
30#include <media/v4l2-int-device.h>
31
32#include "tcm825x.h"
33
34/*
35 * The sensor has two fps modes: the lower one just gives half the fps
36 * at the same xclk than the high one.
37 */
38#define MAX_FPS 30
39#define MIN_FPS 8
40#define MAX_HALF_FPS (MAX_FPS / 2)
41#define HIGH_FPS_MODE_LOWER_LIMIT 14
42#define DEFAULT_FPS MAX_HALF_FPS
43
44struct tcm825x_sensor {
45 const struct tcm825x_platform_data *platform_data;
46 struct v4l2_int_device *v4l2_int_device;
47 struct i2c_client *i2c_client;
48 struct v4l2_pix_format pix;
49 struct v4l2_fract timeperframe;
50};
51
52/* list of image formats supported by TCM825X sensor */
e23b2907 53static const struct v4l2_fmtdesc tcm825x_formats[] = {
a5e90862
SA		 54 {
55 .description = "YUYV (YUV 4:2:2), packed",
56 .pixelformat = V4L2_PIX_FMT_UYVY,
57 }, {
58 /* Note: V4L2 defines RGB565 as:
59 *
60 * Byte 0 Byte 1
61 * g2 g1 g0 r4 r3 r2 r1 r0 b4 b3 b2 b1 b0 g5 g4 g3
62 *
63 * We interpret RGB565 as:
64 *
65 * Byte 0 Byte 1
66 * g2 g1 g0 b4 b3 b2 b1 b0 r4 r3 r2 r1 r0 g5 g4 g3
67 */
68 .description = "RGB565, le",
69 .pixelformat = V4L2_PIX_FMT_RGB565,
70 },
71};
72
73#define TCM825X_NUM_CAPTURE_FORMATS ARRAY_SIZE(tcm825x_formats)
74
75/*
76 * TCM825X register configuration for all combinations of pixel format and
77 * image size
78 */
e23b2907
TK		 79static const struct tcm825x_reg subqcif = { 0x20, TCM825X_PICSIZ };
80static const struct tcm825x_reg qcif = { 0x18, TCM825X_PICSIZ };
81static const struct tcm825x_reg cif = { 0x14, TCM825X_PICSIZ };
82static const struct tcm825x_reg qqvga = { 0x0c, TCM825X_PICSIZ };
83static const struct tcm825x_reg qvga = { 0x04, TCM825X_PICSIZ };
84static const struct tcm825x_reg vga = { 0x00, TCM825X_PICSIZ };
a5e90862 85
e23b2907
TK		 86static const struct tcm825x_reg yuv422 = { 0x00, TCM825X_PICFMT };
87static const struct tcm825x_reg rgb565 = { 0x02, TCM825X_PICFMT };
a5e90862
SA		 88
89/* Our own specific controls */
90#define V4L2_CID_ALC V4L2_CID_PRIVATE_BASE
91#define V4L2_CID_H_EDGE_EN V4L2_CID_PRIVATE_BASE + 1
92#define V4L2_CID_V_EDGE_EN V4L2_CID_PRIVATE_BASE + 2
93#define V4L2_CID_LENS V4L2_CID_PRIVATE_BASE + 3
94#define V4L2_CID_MAX_EXPOSURE_TIME V4L2_CID_PRIVATE_BASE + 4
95#define V4L2_CID_LAST_PRIV V4L2_CID_MAX_EXPOSURE_TIME
96
97/* Video controls */
98static struct vcontrol {
99 struct v4l2_queryctrl qc;
100 u16 reg;
101 u16 start_bit;
102} video_control[] = {
103 {
104 {
105 .id = V4L2_CID_GAIN,
106 .type = V4L2_CTRL_TYPE_INTEGER,
107 .name = "Gain",
108 .minimum = 0,
109 .maximum = 63,
110 .step = 1,
111 },
112 .reg = TCM825X_AG,
113 .start_bit = 0,
114 },
115 {
116 {
117 .id = V4L2_CID_RED_BALANCE,
118 .type = V4L2_CTRL_TYPE_INTEGER,
119 .name = "Red Balance",
120 .minimum = 0,
121 .maximum = 255,
122 .step = 1,
123 },
124 .reg = TCM825X_MRG,
125 .start_bit = 0,
126 },
127 {
128 {
129 .id = V4L2_CID_BLUE_BALANCE,
130 .type = V4L2_CTRL_TYPE_INTEGER,
131 .name = "Blue Balance",
132 .minimum = 0,
133 .maximum = 255,
134 .step = 1,
135 },
136 .reg = TCM825X_MBG,
137 .start_bit = 0,
138 },
139 {
140 {
141 .id = V4L2_CID_AUTO_WHITE_BALANCE,
142 .type = V4L2_CTRL_TYPE_BOOLEAN,
143 .name = "Auto White Balance",
144 .minimum = 0,
145 .maximum = 1,
146 .step = 0,
147 },
148 .reg = TCM825X_AWBSW,
149 .start_bit = 7,
150 },
151 {
152 {
153 .id = V4L2_CID_EXPOSURE,
154 .type = V4L2_CTRL_TYPE_INTEGER,
155 .name = "Exposure Time",
156 .minimum = 0,
157 .maximum = 0x1fff,
158 .step = 1,
159 },
160 .reg = TCM825X_ESRSPD_U,
161 .start_bit = 0,
162 },
163 {
164 {
165 .id = V4L2_CID_HFLIP,
166 .type = V4L2_CTRL_TYPE_BOOLEAN,
167 .name = "Mirror Image",
168 .minimum = 0,
169 .maximum = 1,
170 .step = 0,
171 },
172 .reg = TCM825X_H_INV,
173 .start_bit = 6,
174 },
175 {
176 {
177 .id = V4L2_CID_VFLIP,
178 .type = V4L2_CTRL_TYPE_BOOLEAN,
179 .name = "Vertical Flip",
180 .minimum = 0,
181 .maximum = 1,
182 .step = 0,
183 },
184 .reg = TCM825X_V_INV,
185 .start_bit = 7,
186 },
187 /* Private controls */
188 {
189 {
190 .id = V4L2_CID_ALC,
191 .type = V4L2_CTRL_TYPE_BOOLEAN,
192 .name = "Auto Luminance Control",
193 .minimum = 0,
194 .maximum = 1,
195 .step = 0,
196 },
197 .reg = TCM825X_ALCSW,
198 .start_bit = 7,
199 },
200 {
201 {
202 .id = V4L2_CID_H_EDGE_EN,
203 .type = V4L2_CTRL_TYPE_INTEGER,
204 .name = "Horizontal Edge Enhancement",
205 .minimum = 0,
206 .maximum = 0xff,
207 .step = 1,
208 },
209 .reg = TCM825X_HDTG,
210 .start_bit = 0,
211 },
212 {
213 {
214 .id = V4L2_CID_V_EDGE_EN,
215 .type = V4L2_CTRL_TYPE_INTEGER,
216 .name = "Vertical Edge Enhancement",
217 .minimum = 0,
218 .maximum = 0xff,
219 .step = 1,
220 },
221 .reg = TCM825X_VDTG,
222 .start_bit = 0,
223 },
224 {
225 {
226 .id = V4L2_CID_LENS,
227 .type = V4L2_CTRL_TYPE_INTEGER,
228 .name = "Lens Shading Compensation",
229 .minimum = 0,
230 .maximum = 0x3f,
231 .step = 1,
232 },
233 .reg = TCM825X_LENS,
234 .start_bit = 0,
235 },
236 {
237 {
238 .id = V4L2_CID_MAX_EXPOSURE_TIME,
239 .type = V4L2_CTRL_TYPE_INTEGER,
240 .name = "Maximum Exposure Time",
241 .minimum = 0,
242 .maximum = 0x3,
243 .step = 1,
244 },
245 .reg = TCM825X_ESRLIM,
246 .start_bit = 5,
247 },
248};
249
250
e23b2907 251static const struct tcm825x_reg *tcm825x_siz_reg[NUM_IMAGE_SIZES] =
a5e90862
SA		 252{ &subqcif, &qqvga, &qcif, &qvga, &cif, &vga };
253
e23b2907 254static const struct tcm825x_reg *tcm825x_fmt_reg[NUM_PIXEL_FORMATS] =
a5e90862
SA		 255{ &yuv422, &rgb565 };
256
257/*
258 * Read a value from a register in an TCM825X sensor device. The value is
259 * returned in 'val'.
260 * Returns zero if successful, or non-zero otherwise.
261 */
262static int tcm825x_read_reg(struct i2c_client *client, int reg)
263{
264 int err;
265 struct i2c_msg msg[2];
266 u8 reg_buf, data_buf = 0;
267
268 if (!client->adapter)
269 return -ENODEV;
270
271 msg[0].addr = client->addr;
272 msg[0].flags = 0;
273 msg[0].len = 1;
274 msg[0].buf = &reg_buf;
275 msg[1].addr = client->addr;
276 msg[1].flags = I2C_M_RD;
277 msg[1].len = 1;
278 msg[1].buf = &data_buf;
279
280 reg_buf = reg;
281
282 err = i2c_transfer(client->adapter, msg, 2);
283 if (err < 0)
284 return err;
285 return data_buf;
286}
287
288/*
289 * Write a value to a register in an TCM825X sensor device.
290 * Returns zero if successful, or non-zero otherwise.
291 */
292static int tcm825x_write_reg(struct i2c_client *client, u8 reg, u8 val)
293{
294 int err;
295 struct i2c_msg msg[1];
296 unsigned char data[2];
297
298 if (!client->adapter)
299 return -ENODEV;
300
301 msg->addr = client->addr;
302 msg->flags = 0;
303 msg->len = 2;
304 msg->buf = data;
305 data[0] = reg;
306 data[1] = val;
307 err = i2c_transfer(client->adapter, msg, 1);
308 if (err >= 0)
309 return 0;
310 return err;
311}
312
313static int __tcm825x_write_reg_mask(struct i2c_client *client,
314 u8 reg, u8 val, u8 mask)
315{
316 int rc;
317
318 /* need to do read - modify - write */
319 rc = tcm825x_read_reg(client, reg);
320 if (rc < 0)
321 return rc;
322
323 rc &= (~mask); /* Clear the masked bits */
324 val &= mask; /* Enforce mask on value */
325 val |= rc;
326
327 /* write the new value to the register */
328 rc = tcm825x_write_reg(client, reg, val);
329 if (rc)
330 return rc;
331
332 return 0;
333}
334
335#define tcm825x_write_reg_mask(client, regmask, val) \
336 __tcm825x_write_reg_mask(client, TCM825X_ADDR((regmask)), val, \
337 TCM825X_MASK((regmask)))
338
339
340/*
341 * Initialize a list of TCM825X registers.
342 * The list of registers is terminated by the pair of values
343 * { TCM825X_REG_TERM, TCM825X_VAL_TERM }.
344 * Returns zero if successful, or non-zero otherwise.
345 */
346static int tcm825x_write_default_regs(struct i2c_client *client,
347 const struct tcm825x_reg *reglist)
348{
349 int err;
350 const struct tcm825x_reg *next = reglist;
351
352 while (!((next->reg == TCM825X_REG_TERM)
353 && (next->val == TCM825X_VAL_TERM))) {
354 err = tcm825x_write_reg(client, next->reg, next->val);
355 if (err) {
356 dev_err(&client->dev, "register writing failed\n");
357 return err;
358 }
359 next++;
360 }
361
362 return 0;
363}
364
365static struct vcontrol *find_vctrl(int id)
366{
367 int i;
368
369 if (id < V4L2_CID_BASE)
370 return NULL;
371
372 for (i = 0; i < ARRAY_SIZE(video_control); i++)
373 if (video_control[i].qc.id == id)
374 return &video_control[i];
375
376 return NULL;
377}
378
379/*
380 * Find the best match for a requested image capture size. The best match
381 * is chosen as the nearest match that has the same number or fewer pixels
382 * as the requested size, or the smallest image size if the requested size
383 * has fewer pixels than the smallest image.
384 */
385static enum image_size tcm825x_find_size(struct v4l2_int_device *s,
386 unsigned int width,
387 unsigned int height)
388{
389 enum image_size isize;
390 unsigned long pixels = width * height;
391 struct tcm825x_sensor *sensor = s->priv;
392
393 for (isize = subQCIF; isize < VGA; isize++) {
394 if (tcm825x_sizes[isize + 1].height
395 * tcm825x_sizes[isize + 1].width > pixels) {
396 dev_dbg(&sensor->i2c_client->dev, "size %d\n", isize);
397
398 return isize;
399 }
400 }
401
402 dev_dbg(&sensor->i2c_client->dev, "format default VGA\n");
403
404 return VGA;
405}
406
407/*
408 * Configure the TCM825X for current image size, pixel format, and
409 * frame period. fper is the frame period (in seconds) expressed as a
410 * fraction. Returns zero if successful, or non-zero otherwise. The
411 * actual frame period is returned in fper.
412 */
413static int tcm825x_configure(struct v4l2_int_device *s)
414{
415 struct tcm825x_sensor *sensor = s->priv;
416 struct v4l2_pix_format *pix = &sensor->pix;
417 enum image_size isize = tcm825x_find_size(s, pix->width, pix->height);
418 struct v4l2_fract *fper = &sensor->timeperframe;
419 enum pixel_format pfmt;
420 int err;
421 u32 tgt_fps;
422 u8 val;
423
424 /* common register initialization */
425 err = tcm825x_write_default_regs(
426 sensor->i2c_client, sensor->platform_data->default_regs());
427 if (err)
428 return err;
429
430 /* configure image size */
431 val = tcm825x_siz_reg[isize]->val;
432 dev_dbg(&sensor->i2c_client->dev,
433 "configuring image size %d\n", isize);
434 err = tcm825x_write_reg_mask(sensor->i2c_client,
435 tcm825x_siz_reg[isize]->reg, val);
436 if (err)
437 return err;
438
439 /* configure pixel format */
440 switch (pix->pixelformat) {
441 default:
442 case V4L2_PIX_FMT_RGB565:
443 pfmt = RGB565;
444 break;
445 case V4L2_PIX_FMT_UYVY:
446 pfmt = YUV422;
447 break;
448 }
449
450 dev_dbg(&sensor->i2c_client->dev,
451 "configuring pixel format %d\n", pfmt);
452 val = tcm825x_fmt_reg[pfmt]->val;
453
454 err = tcm825x_write_reg_mask(sensor->i2c_client,
455 tcm825x_fmt_reg[pfmt]->reg, val);
456 if (err)
457 return err;
458
459 /*
460 * For frame rate < 15, the FPS reg (addr 0x02, bit 7) must be
461 * set. Frame rate will be halved from the normal.
462 */
463 tgt_fps = fper->denominator / fper->numerator;
464 if (tgt_fps <= HIGH_FPS_MODE_LOWER_LIMIT) {
465 val = tcm825x_read_reg(sensor->i2c_client, 0x02);
466 val |= 0x80;
467 tcm825x_write_reg(sensor->i2c_client, 0x02, val);
468 }
469
470 return 0;
471}
472
a5e90862
SA		 473static int ioctl_queryctrl(struct v4l2_int_device *s,
474 struct v4l2_queryctrl *qc)
475{
476 struct vcontrol *control;
477
478 control = find_vctrl(qc->id);
479
480 if (control == NULL)
481 return -EINVAL;
482
483 *qc = control->qc;
484
485 return 0;
486}
487
488static int ioctl_g_ctrl(struct v4l2_int_device *s,
489 struct v4l2_control *vc)
490{
491 struct tcm825x_sensor *sensor = s->priv;
492 struct i2c_client *client = sensor->i2c_client;
493 int val, r;
494 struct vcontrol *lvc;
495
25985edc 496 /* exposure time is special, spread across 2 registers */
a5e90862
SA		 497 if (vc->id == V4L2_CID_EXPOSURE) {
498 int val_lower, val_upper;
499
500 val_upper = tcm825x_read_reg(client,
501 TCM825X_ADDR(TCM825X_ESRSPD_U));
502 if (val_upper < 0)
503 return val_upper;
504 val_lower = tcm825x_read_reg(client,
505 TCM825X_ADDR(TCM825X_ESRSPD_L));
506 if (val_lower < 0)
507 return val_lower;
508
509 vc->value = ((val_upper & 0x1f) << 8) | (val_lower);
510 return 0;
511 }
512
513 lvc = find_vctrl(vc->id);
514 if (lvc == NULL)
515 return -EINVAL;
516
517 r = tcm825x_read_reg(client, TCM825X_ADDR(lvc->reg));
518 if (r < 0)
519 return r;
520 val = r & TCM825X_MASK(lvc->reg);
521 val >>= lvc->start_bit;
522
523 if (val < 0)
524 return val;
525
34cb6169
SA		 526 if (vc->id == V4L2_CID_HFLIP || vc->id == V4L2_CID_VFLIP)
527 val ^= sensor->platform_data->is_upside_down();
528
a5e90862
SA		 529 vc->value = val;
530 return 0;
531}
532
533static int ioctl_s_ctrl(struct v4l2_int_device *s,
534 struct v4l2_control *vc)
535{
536 struct tcm825x_sensor *sensor = s->priv;
537 struct i2c_client *client = sensor->i2c_client;
538 struct vcontrol *lvc;
539 int val = vc->value;
540
25985edc 541 /* exposure time is special, spread across 2 registers */
a5e90862
SA		 542 if (vc->id == V4L2_CID_EXPOSURE) {
543 int val_lower, val_upper;
544 val_lower = val & TCM825X_MASK(TCM825X_ESRSPD_L);
545 val_upper = (val >> 8) & TCM825X_MASK(TCM825X_ESRSPD_U);
546
547 if (tcm825x_write_reg_mask(client,
548 TCM825X_ESRSPD_U, val_upper))
549 return -EIO;
550
551 if (tcm825x_write_reg_mask(client,
552 TCM825X_ESRSPD_L, val_lower))
553 return -EIO;
554
555 return 0;
556 }
557
558 lvc = find_vctrl(vc->id);
559 if (lvc == NULL)
560 return -EINVAL;
561
34cb6169
SA		 562 if (vc->id == V4L2_CID_HFLIP || vc->id == V4L2_CID_VFLIP)
563 val ^= sensor->platform_data->is_upside_down();
564
a5e90862
SA		 565 val = val << lvc->start_bit;
566 if (tcm825x_write_reg_mask(client, lvc->reg, val))
567 return -EIO;
568
569 return 0;
570}
571
572static int ioctl_enum_fmt_cap(struct v4l2_int_device *s,
573 struct v4l2_fmtdesc *fmt)
574{
575 int index = fmt->index;
576
577 switch (fmt->type) {
578 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
579 if (index >= TCM825X_NUM_CAPTURE_FORMATS)
580 return -EINVAL;
581 break;
582
583 default:
584 return -EINVAL;
585 }
586
587 fmt->flags = tcm825x_formats[index].flags;
588 strlcpy(fmt->description, tcm825x_formats[index].description,
589 sizeof(fmt->description));
590 fmt->pixelformat = tcm825x_formats[index].pixelformat;
591
592 return 0;
593}
594
595static int ioctl_try_fmt_cap(struct v4l2_int_device *s,
596 struct v4l2_format *f)
597{
598 struct tcm825x_sensor *sensor = s->priv;
599 enum image_size isize;
600 int ifmt;
601 struct v4l2_pix_format *pix = &f->fmt.pix;
602
603 isize = tcm825x_find_size(s, pix->width, pix->height);
f58db959
MCC		 604 dev_dbg(&sensor->i2c_client->dev, "isize = %d num_capture = %lu\n",
605 isize, (unsigned long)TCM825X_NUM_CAPTURE_FORMATS);
a5e90862
SA		 606
607 pix->width = tcm825x_sizes[isize].width;
608 pix->height = tcm825x_sizes[isize].height;
609
610 for (ifmt = 0; ifmt < TCM825X_NUM_CAPTURE_FORMATS; ifmt++)
611 if (pix->pixelformat == tcm825x_formats[ifmt].pixelformat)
612 break;
613
614 if (ifmt == TCM825X_NUM_CAPTURE_FORMATS)
615 ifmt = 0; /* Default = YUV 4:2:2 */
616
617 pix->pixelformat = tcm825x_formats[ifmt].pixelformat;
618 pix->field = V4L2_FIELD_NONE;
619 pix->bytesperline = pix->width * TCM825X_BYTES_PER_PIXEL;
620 pix->sizeimage = pix->bytesperline * pix->height;
621 pix->priv = 0;
622 dev_dbg(&sensor->i2c_client->dev, "format = 0x%08x\n",
623 pix->pixelformat);
624
625 switch (pix->pixelformat) {
626 case V4L2_PIX_FMT_UYVY:
627 default:
628 pix->colorspace = V4L2_COLORSPACE_JPEG;
629 break;
630 case V4L2_PIX_FMT_RGB565:
631 pix->colorspace = V4L2_COLORSPACE_SRGB;
632 break;
633 }
634
635 return 0;
636}
637
638static int ioctl_s_fmt_cap(struct v4l2_int_device *s,
639 struct v4l2_format *f)
640{
641 struct tcm825x_sensor *sensor = s->priv;
642 struct v4l2_pix_format *pix = &f->fmt.pix;
643 int rval;
644
645 rval = ioctl_try_fmt_cap(s, f);
646 if (rval)
647 return rval;
648
649 rval = tcm825x_configure(s);
650
651 sensor->pix = *pix;
652
653 return rval;
654}
655
656static int ioctl_g_fmt_cap(struct v4l2_int_device *s,
657 struct v4l2_format *f)
658{
659 struct tcm825x_sensor *sensor = s->priv;
660
661 f->fmt.pix = sensor->pix;
662
663 return 0;
664}
665
666static int ioctl_g_parm(struct v4l2_int_device *s,
667 struct v4l2_streamparm *a)
668{
669 struct tcm825x_sensor *sensor = s->priv;
670 struct v4l2_captureparm *cparm = &a->parm.capture;
671
672 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
673 return -EINVAL;
674
675 memset(a, 0, sizeof(*a));
676 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
677
678 cparm->capability = V4L2_CAP_TIMEPERFRAME;
679 cparm->timeperframe = sensor->timeperframe;
680
681 return 0;
682}
683
684static int ioctl_s_parm(struct v4l2_int_device *s,
685 struct v4l2_streamparm *a)
686{
687 struct tcm825x_sensor *sensor = s->priv;
688 struct v4l2_fract *timeperframe = &a->parm.capture.timeperframe;
689 u32 tgt_fps; /* target frames per secound */
690 int rval;
691
692 if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
693 return -EINVAL;
694
695 if ((timeperframe->numerator == 0)
696 || (timeperframe->denominator == 0)) {
697 timeperframe->denominator = DEFAULT_FPS;
698 timeperframe->numerator = 1;
699 }
700
701 tgt_fps = timeperframe->denominator / timeperframe->numerator;
702
703 if (tgt_fps > MAX_FPS) {
704 timeperframe->denominator = MAX_FPS;
705 timeperframe->numerator = 1;
706 } else if (tgt_fps < MIN_FPS) {
707 timeperframe->denominator = MIN_FPS;
708 timeperframe->numerator = 1;
709 }
710
711 sensor->timeperframe = *timeperframe;
712
713 rval = tcm825x_configure(s);
714
715 return rval;
716}
717
718static int ioctl_s_power(struct v4l2_int_device *s, int on)
719{
720 struct tcm825x_sensor *sensor = s->priv;
721
722 return sensor->platform_data->power_set(on);
723}
724
20609557
SA		 725/*
726 * Given the image capture format in pix, the nominal frame period in
727 * timeperframe, calculate the required xclk frequency.
728 *
729 * TCM825X input frequency characteristics are:
730 * Minimum 11.9 MHz, Typical 24.57 MHz and maximum 25/27 MHz
731 */
732
733static int ioctl_g_ifparm(struct v4l2_int_device *s, struct v4l2_ifparm *p)
734{
735 struct tcm825x_sensor *sensor = s->priv;
736 struct v4l2_fract *timeperframe = &sensor->timeperframe;
737 u32 tgt_xclk; /* target xclk */
738 u32 tgt_fps; /* target frames per secound */
739 int rval;
740
741 rval = sensor->platform_data->ifparm(p);
742 if (rval)
743 return rval;
744
745 tgt_fps = timeperframe->denominator / timeperframe->numerator;
746
747 tgt_xclk = (tgt_fps <= HIGH_FPS_MODE_LOWER_LIMIT) ?
748 (2457 * tgt_fps) / MAX_HALF_FPS :
749 (2457 * tgt_fps) / MAX_FPS;
750 tgt_xclk *= 10000;
751
752 tgt_xclk = min(tgt_xclk, (u32)TCM825X_XCLK_MAX);
753 tgt_xclk = max(tgt_xclk, (u32)TCM825X_XCLK_MIN);
754
755 p->u.bt656.clock_curr = tgt_xclk;
756
757 return 0;
758}
759
a5e90862
SA		 760static int ioctl_g_needs_reset(struct v4l2_int_device *s, void *buf)
761{
762 struct tcm825x_sensor *sensor = s->priv;
763
764 return sensor->platform_data->needs_reset(s, buf, &sensor->pix);
765}
766
767static int ioctl_reset(struct v4l2_int_device *s)
768{
769 return -EBUSY;
770}
771
772static int ioctl_init(struct v4l2_int_device *s)
773{
774 return tcm825x_configure(s);
775}
776
777static int ioctl_dev_exit(struct v4l2_int_device *s)
778{
779 return 0;
780}
781
782static int ioctl_dev_init(struct v4l2_int_device *s)
783{
784 struct tcm825x_sensor *sensor = s->priv;
785 int r;
786
787 r = tcm825x_read_reg(sensor->i2c_client, 0x01);
788 if (r < 0)
789 return r;
790 if (r == 0) {
791 dev_err(&sensor->i2c_client->dev, "device not detected\n");
792 return -EIO;
793 }
794 return 0;
795}
796
20609557 797static struct v4l2_int_ioctl_desc tcm825x_ioctl_desc[] = {
a5e90862 798 { vidioc_int_dev_init_num,
20609557 799 (v4l2_int_ioctl_func *)ioctl_dev_init },
a5e90862 800 { vidioc_int_dev_exit_num,
20609557 801 (v4l2_int_ioctl_func *)ioctl_dev_exit },
a5e90862 802 { vidioc_int_s_power_num,
20609557
SA		 803 (v4l2_int_ioctl_func *)ioctl_s_power },
804 { vidioc_int_g_ifparm_num,
805 (v4l2_int_ioctl_func *)ioctl_g_ifparm },
a5e90862 806 { vidioc_int_g_needs_reset_num,
20609557 807 (v4l2_int_ioctl_func *)ioctl_g_needs_reset },
a5e90862 808 { vidioc_int_reset_num,
20609557 809 (v4l2_int_ioctl_func *)ioctl_reset },
a5e90862 810 { vidioc_int_init_num,
20609557 811 (v4l2_int_ioctl_func *)ioctl_init },
a5e90862 812 { vidioc_int_enum_fmt_cap_num,
20609557 813 (v4l2_int_ioctl_func *)ioctl_enum_fmt_cap },
a5e90862 814 { vidioc_int_try_fmt_cap_num,
20609557 815 (v4l2_int_ioctl_func *)ioctl_try_fmt_cap },
a5e90862 816 { vidioc_int_g_fmt_cap_num,
20609557 817 (v4l2_int_ioctl_func *)ioctl_g_fmt_cap },
a5e90862 818 { vidioc_int_s_fmt_cap_num,
20609557 819 (v4l2_int_ioctl_func *)ioctl_s_fmt_cap },
a5e90862 820 { vidioc_int_g_parm_num,
20609557 821 (v4l2_int_ioctl_func *)ioctl_g_parm },
a5e90862 822 { vidioc_int_s_parm_num,
20609557 823 (v4l2_int_ioctl_func *)ioctl_s_parm },
a5e90862 824 { vidioc_int_queryctrl_num,
20609557 825 (v4l2_int_ioctl_func *)ioctl_queryctrl },
a5e90862 826 { vidioc_int_g_ctrl_num,
20609557 827 (v4l2_int_ioctl_func *)ioctl_g_ctrl },
a5e90862 828 { vidioc_int_s_ctrl_num,
20609557 829 (v4l2_int_ioctl_func *)ioctl_s_ctrl },
a5e90862
SA		 830};
831
832static struct v4l2_int_slave tcm825x_slave = {
833 .ioctls = tcm825x_ioctl_desc,
834 .num_ioctls = ARRAY_SIZE(tcm825x_ioctl_desc),
835};
836
837static struct tcm825x_sensor tcm825x;
838
839static struct v4l2_int_device tcm825x_int_device = {
840 .module = THIS_MODULE,
841 .name = TCM825X_NAME,
842 .priv = &tcm825x,
843 .type = v4l2_int_type_slave,
844 .u = {
845 .slave = &tcm825x_slave,
846 },
847};
848
d2653e92
JD		 849static int tcm825x_probe(struct i2c_client *client,
850 const struct i2c_device_id *did)
a5e90862
SA		 851{
852 struct tcm825x_sensor *sensor = &tcm825x;
a5e90862
SA		 853
854 if (i2c_get_clientdata(client))
855 return -EBUSY;
856
857 sensor->platform_data = client->dev.platform_data;
858
859 if (sensor->platform_data == NULL
0ed464e1 860 || !sensor->platform_data->is_okay())
a5e90862
SA		 861 return -ENODEV;
862
863 sensor->v4l2_int_device = &tcm825x_int_device;
864
865 sensor->i2c_client = client;
866 i2c_set_clientdata(client, sensor);
867
868 /* Make the default capture format QVGA RGB565 */
869 sensor->pix.width = tcm825x_sizes[QVGA].width;
870 sensor->pix.height = tcm825x_sizes[QVGA].height;
871 sensor->pix.pixelformat = V4L2_PIX_FMT_RGB565;
872
fbae3fb1 873 return v4l2_int_device_register(sensor->v4l2_int_device);
a5e90862
SA		 874}
875
54bb501c 876static int tcm825x_remove(struct i2c_client *client)
a5e90862
SA		 877{
878 struct tcm825x_sensor *sensor = i2c_get_clientdata(client);
879
880 if (!client->adapter)
881 return -ENODEV; /* our client isn't attached */
882
883 v4l2_int_device_unregister(sensor->v4l2_int_device);
a5e90862
SA		 884
885 return 0;
886}
887
ae429083
JD		 888static const struct i2c_device_id tcm825x_id[] = {
889 { "tcm825x", 0 },
890 { }
891};
892MODULE_DEVICE_TABLE(i2c, tcm825x_id);
893
a5e90862 894static struct i2c_driver tcm825x_i2c_driver = {
20609557 895 .driver = {
a5e90862
SA		 896 .name = TCM825X_NAME,
897 },
20609557 898 .probe = tcm825x_probe,
54bb501c 899 .remove = tcm825x_remove,
ae429083 900 .id_table = tcm825x_id,
a5e90862
SA		 901};
902
903static struct tcm825x_sensor tcm825x = {
904 .timeperframe = {
20609557 905 .numerator = 1,
a5e90862
SA		 906 .denominator = DEFAULT_FPS,
907 },
908};
909
910static int __init tcm825x_init(void)
911{
912 int rval;
a5e90862
SA		 913
914 rval = i2c_add_driver(&tcm825x_i2c_driver);
915 if (rval)
916 printk(KERN_INFO "%s: failed registering " TCM825X_NAME "\n",
7e28adb2 917 __func__);
a5e90862
SA		 918
919 return rval;
920}
921
922static void __exit tcm825x_exit(void)
923{
924 i2c_del_driver(&tcm825x_i2c_driver);
925}
926
927/*
928 * FIXME: Menelaus isn't ready (?) at module_init stage, so use
929 * late_initcall for now.
930 */
931late_initcall(tcm825x_init);
932module_exit(tcm825x_exit);
933
934MODULE_AUTHOR("Sakari Ailus <sakari.ailus@nokia.com>");
935MODULE_DESCRIPTION("TCM825x camera sensor driver");
936MODULE_LICENSE("GPL");
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