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7
8#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
9
10#include <linux/bug.h>
11#include <linux/clk.h>
12#include <linux/delay.h>
13#include <linux/device.h>
14#include <linux/errno.h>
15#include <linux/gpio.h>
16#include <linux/i2c.h>
17#include <linux/interrupt.h>
18#include <linux/io.h>
19#include <linux/kernel.h>
20#include <linux/list.h>
21#include <linux/module.h>
22#include <linux/platform_device.h>
23#include <linux/pm_runtime.h>
24#include <linux/slab.h>
25#include <linux/types.h>
26#include <linux/version.h>
27
28#include <media/media-device.h>
29#include <media/v4l2-ctrls.h>
30#include <media/v4l2-ioctl.h>
31#include <media/videobuf2-v4l2.h>
32#include <media/videobuf2-dma-contig.h>
33
34#include "camif-core.h"
35
36static char *camif_clocks[CLK_MAX_NUM] = {
37
38 [CLK_GATE] = "camif",
39
40 [CLK_CAM] = "camera",
41};
42
43static const struct camif_fmt camif_formats[] = {
44 {
45 .name = "YUV 4:2:2 planar, Y/Cb/Cr",
46 .fourcc = V4L2_PIX_FMT_YUV422P,
47 .depth = 16,
48 .ybpp = 1,
49 .color = IMG_FMT_YCBCR422P,
50 .colplanes = 3,
51 .flags = FMT_FL_S3C24XX_CODEC |
52 FMT_FL_S3C64XX,
53 }, {
54 .name = "YUV 4:2:0 planar, Y/Cb/Cr",
55 .fourcc = V4L2_PIX_FMT_YUV420,
56 .depth = 12,
57 .ybpp = 1,
58 .color = IMG_FMT_YCBCR420,
59 .colplanes = 3,
60 .flags = FMT_FL_S3C24XX_CODEC |
61 FMT_FL_S3C64XX,
62 }, {
63 .name = "YVU 4:2:0 planar, Y/Cr/Cb",
64 .fourcc = V4L2_PIX_FMT_YVU420,
65 .depth = 12,
66 .ybpp = 1,
67 .color = IMG_FMT_YCRCB420,
68 .colplanes = 3,
69 .flags = FMT_FL_S3C24XX_CODEC |
70 FMT_FL_S3C64XX,
71 }, {
72 .name = "RGB565, 16 bpp",
73 .fourcc = V4L2_PIX_FMT_RGB565X,
74 .depth = 16,
75 .ybpp = 2,
76 .color = IMG_FMT_RGB565,
77 .colplanes = 1,
78 .flags = FMT_FL_S3C24XX_PREVIEW |
79 FMT_FL_S3C64XX,
80 }, {
81 .name = "XRGB8888, 32 bpp",
82 .fourcc = V4L2_PIX_FMT_RGB32,
83 .depth = 32,
84 .ybpp = 4,
85 .color = IMG_FMT_XRGB8888,
86 .colplanes = 1,
87 .flags = FMT_FL_S3C24XX_PREVIEW |
88 FMT_FL_S3C64XX,
89 }, {
90 .name = "BGR666",
91 .fourcc = V4L2_PIX_FMT_BGR666,
92 .depth = 32,
93 .ybpp = 4,
94 .color = IMG_FMT_RGB666,
95 .colplanes = 1,
96 .flags = FMT_FL_S3C64XX,
97 }
98};
99
100
101
102
103
104
105
106const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
107 const u32 *pixelformat,
108 int index)
109{
110 const struct camif_fmt *fmt, *def_fmt = NULL;
111 unsigned int i;
112 int id = 0;
113
114 if (index >= (int)ARRAY_SIZE(camif_formats))
115 return NULL;
116
117 for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
118 fmt = &camif_formats[i];
119 if (vp && !(vp->fmt_flags & fmt->flags))
120 continue;
121 if (pixelformat && fmt->fourcc == *pixelformat)
122 return fmt;
123 if (index == id)
124 def_fmt = fmt;
125 id++;
126 }
127 return def_fmt;
128}
129
130static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
131{
132 unsigned int sh = 6;
133
134 if (src >= 64 * tar)
135 return -EINVAL;
136
137 while (sh--) {
138 unsigned int tmp = 1 << sh;
139 if (src >= tar * tmp) {
140 *shift = sh, *ratio = tmp;
141 return 0;
142 }
143 }
144 *shift = 0, *ratio = 1;
145 return 0;
146}
147
148int s3c_camif_get_scaler_config(struct camif_vp *vp,
149 struct camif_scaler *scaler)
150{
151 struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
152 int source_x = camif_crop->width;
153 int source_y = camif_crop->height;
154 int target_x = vp->out_frame.rect.width;
155 int target_y = vp->out_frame.rect.height;
156 int ret;
157
158 if (vp->rotation == 90 || vp->rotation == 270)
159 swap(target_x, target_y);
160
161 ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
162 &scaler->h_shift);
163 if (ret < 0)
164 return ret;
165
166 ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
167 &scaler->v_shift);
168 if (ret < 0)
169 return ret;
170
171 scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
172 scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
173
174 scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
175 scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
176
177 scaler->scaleup_h = (target_x >= source_x);
178 scaler->scaleup_v = (target_y >= source_y);
179
180 scaler->copy = 0;
181
182 pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
183 scaler->pre_h_ratio, scaler->h_shift,
184 scaler->pre_v_ratio, scaler->v_shift);
185
186 pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
187 source_x, source_y, target_x, target_y,
188 scaler->scaleup_h, scaler->scaleup_v);
189
190 return 0;
191}
192
193static int camif_register_sensor(struct camif_dev *camif)
194{
195 struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
196 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
197 struct i2c_adapter *adapter;
198 struct v4l2_subdev_format format;
199 struct v4l2_subdev *sd;
200 int ret;
201
202 camif->sensor.sd = NULL;
203
204 if (sensor->i2c_board_info.addr == 0)
205 return -EINVAL;
206
207 adapter = i2c_get_adapter(sensor->i2c_bus_num);
208 if (adapter == NULL) {
209 v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
210 sensor->i2c_bus_num);
211 return -EPROBE_DEFER;
212 }
213
214 sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
215 &sensor->i2c_board_info, NULL);
216 if (sd == NULL) {
217 i2c_put_adapter(adapter);
218 v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
219 sensor->i2c_board_info.type);
220 return -EPROBE_DEFER;
221 }
222 camif->sensor.sd = sd;
223
224 v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
225
226
227 format.pad = 0;
228 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
229 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
230
231 if (ret < 0)
232 return 0;
233
234 format.pad = CAMIF_SD_PAD_SINK;
235 v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
236
237 v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
238 format.format.width, format.format.height,
239 format.format.code);
240 return 0;
241}
242
243static void camif_unregister_sensor(struct camif_dev *camif)
244{
245 struct v4l2_subdev *sd = camif->sensor.sd;
246 struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
247 struct i2c_adapter *adapter;
248
249 if (client == NULL)
250 return;
251
252 adapter = client->adapter;
253 v4l2_device_unregister_subdev(sd);
254 camif->sensor.sd = NULL;
255 i2c_unregister_device(client);
256 i2c_put_adapter(adapter);
257}
258
259static int camif_create_media_links(struct camif_dev *camif)
260{
261 int i, ret;
262
263 ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
264 &camif->subdev.entity, CAMIF_SD_PAD_SINK,
265 MEDIA_LNK_FL_IMMUTABLE |
266 MEDIA_LNK_FL_ENABLED);
267 if (ret)
268 return ret;
269
270 for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
271 ret = media_create_pad_link(&camif->subdev.entity, i,
272 &camif->vp[i - 1].vdev.entity, 0,
273 MEDIA_LNK_FL_IMMUTABLE |
274 MEDIA_LNK_FL_ENABLED);
275 }
276
277 return ret;
278}
279
280static int camif_register_video_nodes(struct camif_dev *camif)
281{
282 int ret = s3c_camif_register_video_node(camif, VP_CODEC);
283 if (ret < 0)
284 return ret;
285
286 return s3c_camif_register_video_node(camif, VP_PREVIEW);
287}
288
289static void camif_unregister_video_nodes(struct camif_dev *camif)
290{
291 s3c_camif_unregister_video_node(camif, VP_CODEC);
292 s3c_camif_unregister_video_node(camif, VP_PREVIEW);
293}
294
295static void camif_unregister_media_entities(struct camif_dev *camif)
296{
297 camif_unregister_video_nodes(camif);
298 camif_unregister_sensor(camif);
299 s3c_camif_unregister_subdev(camif);
300}
301
302
303
304
305static int camif_media_dev_init(struct camif_dev *camif)
306{
307 struct media_device *md = &camif->media_dev;
308 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
309 unsigned int ip_rev = camif->variant->ip_revision;
310 int ret;
311
312 memset(md, 0, sizeof(*md));
313 snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
314 ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
315 strscpy(md->bus_info, "platform", sizeof(md->bus_info));
316 md->hw_revision = ip_rev;
317
318 md->dev = camif->dev;
319
320 strscpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
321 v4l2_dev->mdev = md;
322
323 media_device_init(md);
324
325 ret = v4l2_device_register(camif->dev, v4l2_dev);
326 if (ret < 0)
327 return ret;
328
329 return ret;
330}
331
332static void camif_clk_put(struct camif_dev *camif)
333{
334 int i;
335
336 for (i = 0; i < CLK_MAX_NUM; i++) {
337 if (IS_ERR(camif->clock[i]))
338 continue;
339 clk_unprepare(camif->clock[i]);
340 clk_put(camif->clock[i]);
341 camif->clock[i] = ERR_PTR(-EINVAL);
342 }
343}
344
345static int camif_clk_get(struct camif_dev *camif)
346{
347 int ret, i;
348
349 for (i = 1; i < CLK_MAX_NUM; i++)
350 camif->clock[i] = ERR_PTR(-EINVAL);
351
352 for (i = 0; i < CLK_MAX_NUM; i++) {
353 camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
354 if (IS_ERR(camif->clock[i])) {
355 ret = PTR_ERR(camif->clock[i]);
356 goto err;
357 }
358 ret = clk_prepare(camif->clock[i]);
359 if (ret < 0) {
360 clk_put(camif->clock[i]);
361 camif->clock[i] = NULL;
362 goto err;
363 }
364 }
365 return 0;
366err:
367 camif_clk_put(camif);
368 dev_err(camif->dev, "failed to get clock: %s\n",
369 camif_clocks[i]);
370 return ret;
371}
372
373
374
375
376
377
378static int camif_request_irqs(struct platform_device *pdev,
379 struct camif_dev *camif)
380{
381 int irq, ret, i;
382
383 for (i = 0; i < CAMIF_VP_NUM; i++) {
384 struct camif_vp *vp = &camif->vp[i];
385
386 init_waitqueue_head(&vp->irq_queue);
387
388 irq = platform_get_irq(pdev, i);
389 if (irq <= 0) {
390 dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
391 return -ENXIO;
392 }
393
394 ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
395 0, dev_name(&pdev->dev), vp);
396 if (ret < 0) {
397 dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
398 break;
399 }
400 }
401
402 return ret;
403}
404
405static int s3c_camif_probe(struct platform_device *pdev)
406{
407 struct device *dev = &pdev->dev;
408 struct s3c_camif_plat_data *pdata = dev->platform_data;
409 struct s3c_camif_drvdata *drvdata;
410 struct camif_dev *camif;
411 struct resource *mres;
412 int ret = 0;
413
414 camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
415 if (!camif)
416 return -ENOMEM;
417
418 spin_lock_init(&camif->slock);
419 mutex_init(&camif->lock);
420
421 camif->dev = dev;
422
423 if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
424 dev_err(dev, "wrong platform data\n");
425 return -EINVAL;
426 }
427
428 camif->pdata = *pdata;
429 drvdata = (void *)platform_get_device_id(pdev)->driver_data;
430 camif->variant = drvdata->variant;
431
432 mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
433
434 camif->io_base = devm_ioremap_resource(dev, mres);
435 if (IS_ERR(camif->io_base))
436 return PTR_ERR(camif->io_base);
437
438 ret = camif_request_irqs(pdev, camif);
439 if (ret < 0)
440 return ret;
441
442 ret = pdata->gpio_get();
443 if (ret < 0)
444 return ret;
445
446 ret = s3c_camif_create_subdev(camif);
447 if (ret < 0)
448 goto err_sd;
449
450 ret = camif_clk_get(camif);
451 if (ret < 0)
452 goto err_clk;
453
454 platform_set_drvdata(pdev, camif);
455 clk_set_rate(camif->clock[CLK_CAM],
456 camif->pdata.sensor.clock_frequency);
457
458 dev_info(dev, "sensor clock frequency: %lu\n",
459 clk_get_rate(camif->clock[CLK_CAM]));
460
461
462
463
464
465 s3c_camif_set_defaults(camif);
466
467 pm_runtime_enable(dev);
468
469 ret = pm_runtime_get_sync(dev);
470 if (ret < 0)
471 goto err_pm;
472
473 ret = camif_media_dev_init(camif);
474 if (ret < 0)
475 goto err_alloc;
476
477 ret = camif_register_sensor(camif);
478 if (ret < 0)
479 goto err_sens;
480
481 ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
482 if (ret < 0)
483 goto err_sens;
484
485 ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
486 if (ret < 0)
487 goto err_sens;
488
489 ret = camif_register_video_nodes(camif);
490 if (ret < 0)
491 goto err_sens;
492
493 ret = camif_create_media_links(camif);
494 if (ret < 0)
495 goto err_sens;
496
497 ret = media_device_register(&camif->media_dev);
498 if (ret < 0)
499 goto err_sens;
500
501 pm_runtime_put(dev);
502 return 0;
503
504err_sens:
505 v4l2_device_unregister(&camif->v4l2_dev);
506 media_device_unregister(&camif->media_dev);
507 media_device_cleanup(&camif->media_dev);
508 camif_unregister_media_entities(camif);
509err_alloc:
510 pm_runtime_put(dev);
511 pm_runtime_disable(dev);
512err_pm:
513 camif_clk_put(camif);
514err_clk:
515 s3c_camif_unregister_subdev(camif);
516err_sd:
517 pdata->gpio_put();
518 return ret;
519}
520
521static int s3c_camif_remove(struct platform_device *pdev)
522{
523 struct camif_dev *camif = platform_get_drvdata(pdev);
524 struct s3c_camif_plat_data *pdata = &camif->pdata;
525
526 media_device_unregister(&camif->media_dev);
527 media_device_cleanup(&camif->media_dev);
528 camif_unregister_media_entities(camif);
529 v4l2_device_unregister(&camif->v4l2_dev);
530
531 pm_runtime_disable(&pdev->dev);
532 camif_clk_put(camif);
533 pdata->gpio_put();
534
535 return 0;
536}
537
538static int s3c_camif_runtime_resume(struct device *dev)
539{
540 struct camif_dev *camif = dev_get_drvdata(dev);
541
542 clk_enable(camif->clock[CLK_GATE]);
543
544 clk_enable(camif->clock[CLK_CAM]);
545 return 0;
546}
547
548static int s3c_camif_runtime_suspend(struct device *dev)
549{
550 struct camif_dev *camif = dev_get_drvdata(dev);
551
552
553 clk_disable(camif->clock[CLK_CAM]);
554
555 clk_disable(camif->clock[CLK_GATE]);
556 return 0;
557}
558
559static const struct s3c_camif_variant s3c244x_camif_variant = {
560 .vp_pix_limits = {
561 [VP_CODEC] = {
562 .max_out_width = 4096,
563 .max_sc_out_width = 2048,
564 .out_width_align = 16,
565 .min_out_width = 16,
566 .max_height = 4096,
567 },
568 [VP_PREVIEW] = {
569 .max_out_width = 640,
570 .max_sc_out_width = 640,
571 .out_width_align = 16,
572 .min_out_width = 16,
573 .max_height = 480,
574 }
575 },
576 .pix_limits = {
577 .win_hor_offset_align = 8,
578 },
579 .ip_revision = S3C244X_CAMIF_IP_REV,
580};
581
582static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
583 .variant = &s3c244x_camif_variant,
584 .bus_clk_freq = 24000000UL,
585};
586
587static const struct s3c_camif_variant s3c6410_camif_variant = {
588 .vp_pix_limits = {
589 [VP_CODEC] = {
590 .max_out_width = 4096,
591 .max_sc_out_width = 2048,
592 .out_width_align = 16,
593 .min_out_width = 16,
594 .max_height = 4096,
595 },
596 [VP_PREVIEW] = {
597 .max_out_width = 4096,
598 .max_sc_out_width = 720,
599 .out_width_align = 16,
600 .min_out_width = 16,
601 .max_height = 4096,
602 }
603 },
604 .pix_limits = {
605 .win_hor_offset_align = 8,
606 },
607 .ip_revision = S3C6410_CAMIF_IP_REV,
608 .has_img_effect = 1,
609 .vp_offset = 0x20,
610};
611
612static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
613 .variant = &s3c6410_camif_variant,
614 .bus_clk_freq = 133000000UL,
615};
616
617static const struct platform_device_id s3c_camif_driver_ids[] = {
618 {
619 .name = "s3c2440-camif",
620 .driver_data = (unsigned long)&s3c244x_camif_drvdata,
621 }, {
622 .name = "s3c6410-camif",
623 .driver_data = (unsigned long)&s3c6410_camif_drvdata,
624 },
625 { },
626};
627MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
628
629static const struct dev_pm_ops s3c_camif_pm_ops = {
630 .runtime_suspend = s3c_camif_runtime_suspend,
631 .runtime_resume = s3c_camif_runtime_resume,
632};
633
634static struct platform_driver s3c_camif_driver = {
635 .probe = s3c_camif_probe,
636 .remove = s3c_camif_remove,
637 .id_table = s3c_camif_driver_ids,
638 .driver = {
639 .name = S3C_CAMIF_DRIVER_NAME,
640 .pm = &s3c_camif_pm_ops,
641 }
642};
643
644module_platform_driver(s3c_camif_driver);
645
646MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
647MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
648MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
649MODULE_LICENSE("GPL");
650
