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12#define pr_fmt(fmt) "%s:%d " fmt, __func__, __LINE__
13
14#include <linux/bug.h>
15#include <linux/clk.h>
16#include <linux/delay.h>
17#include <linux/device.h>
18#include <linux/errno.h>
19#include <linux/gpio.h>
20#include <linux/i2c.h>
21#include <linux/interrupt.h>
22#include <linux/io.h>
23#include <linux/kernel.h>
24#include <linux/list.h>
25#include <linux/module.h>
26#include <linux/platform_device.h>
27#include <linux/pm_runtime.h>
28#include <linux/slab.h>
29#include <linux/types.h>
30#include <linux/version.h>
31
32#include <media/media-device.h>
33#include <media/v4l2-ctrls.h>
34#include <media/v4l2-ioctl.h>
35#include <media/videobuf2-v4l2.h>
36#include <media/videobuf2-dma-contig.h>
37
38#include "camif-core.h"
39
40static char *camif_clocks[CLK_MAX_NUM] = {
41
42 [CLK_GATE] = "camif",
43
44 [CLK_CAM] = "camera",
45};
46
47static const struct camif_fmt camif_formats[] = {
48 {
49 .name = "YUV 4:2:2 planar, Y/Cb/Cr",
50 .fourcc = V4L2_PIX_FMT_YUV422P,
51 .depth = 16,
52 .ybpp = 1,
53 .color = IMG_FMT_YCBCR422P,
54 .colplanes = 3,
55 .flags = FMT_FL_S3C24XX_CODEC |
56 FMT_FL_S3C64XX,
57 }, {
58 .name = "YUV 4:2:0 planar, Y/Cb/Cr",
59 .fourcc = V4L2_PIX_FMT_YUV420,
60 .depth = 12,
61 .ybpp = 1,
62 .color = IMG_FMT_YCBCR420,
63 .colplanes = 3,
64 .flags = FMT_FL_S3C24XX_CODEC |
65 FMT_FL_S3C64XX,
66 }, {
67 .name = "YVU 4:2:0 planar, Y/Cr/Cb",
68 .fourcc = V4L2_PIX_FMT_YVU420,
69 .depth = 12,
70 .ybpp = 1,
71 .color = IMG_FMT_YCRCB420,
72 .colplanes = 3,
73 .flags = FMT_FL_S3C24XX_CODEC |
74 FMT_FL_S3C64XX,
75 }, {
76 .name = "RGB565, 16 bpp",
77 .fourcc = V4L2_PIX_FMT_RGB565X,
78 .depth = 16,
79 .ybpp = 2,
80 .color = IMG_FMT_RGB565,
81 .colplanes = 1,
82 .flags = FMT_FL_S3C24XX_PREVIEW |
83 FMT_FL_S3C64XX,
84 }, {
85 .name = "XRGB8888, 32 bpp",
86 .fourcc = V4L2_PIX_FMT_RGB32,
87 .depth = 32,
88 .ybpp = 4,
89 .color = IMG_FMT_XRGB8888,
90 .colplanes = 1,
91 .flags = FMT_FL_S3C24XX_PREVIEW |
92 FMT_FL_S3C64XX,
93 }, {
94 .name = "BGR666",
95 .fourcc = V4L2_PIX_FMT_BGR666,
96 .depth = 32,
97 .ybpp = 4,
98 .color = IMG_FMT_RGB666,
99 .colplanes = 1,
100 .flags = FMT_FL_S3C64XX,
101 }
102};
103
104
105
106
107
108
109const struct camif_fmt *s3c_camif_find_format(struct camif_vp *vp,
110 const u32 *pixelformat,
111 int index)
112{
113 const struct camif_fmt *fmt, *def_fmt = NULL;
114 unsigned int i;
115 int id = 0;
116
117 if (index >= (int)ARRAY_SIZE(camif_formats))
118 return NULL;
119
120 for (i = 0; i < ARRAY_SIZE(camif_formats); ++i) {
121 fmt = &camif_formats[i];
122 if (vp && !(vp->fmt_flags & fmt->flags))
123 continue;
124 if (pixelformat && fmt->fourcc == *pixelformat)
125 return fmt;
126 if (index == id)
127 def_fmt = fmt;
128 id++;
129 }
130 return def_fmt;
131}
132
133static int camif_get_scaler_factor(u32 src, u32 tar, u32 *ratio, u32 *shift)
134{
135 unsigned int sh = 6;
136
137 if (src >= 64 * tar)
138 return -EINVAL;
139
140 while (sh--) {
141 unsigned int tmp = 1 << sh;
142 if (src >= tar * tmp) {
143 *shift = sh, *ratio = tmp;
144 return 0;
145 }
146 }
147 *shift = 0, *ratio = 1;
148 return 0;
149}
150
151int s3c_camif_get_scaler_config(struct camif_vp *vp,
152 struct camif_scaler *scaler)
153{
154 struct v4l2_rect *camif_crop = &vp->camif->camif_crop;
155 int source_x = camif_crop->width;
156 int source_y = camif_crop->height;
157 int target_x = vp->out_frame.rect.width;
158 int target_y = vp->out_frame.rect.height;
159 int ret;
160
161 if (vp->rotation == 90 || vp->rotation == 270)
162 swap(target_x, target_y);
163
164 ret = camif_get_scaler_factor(source_x, target_x, &scaler->pre_h_ratio,
165 &scaler->h_shift);
166 if (ret < 0)
167 return ret;
168
169 ret = camif_get_scaler_factor(source_y, target_y, &scaler->pre_v_ratio,
170 &scaler->v_shift);
171 if (ret < 0)
172 return ret;
173
174 scaler->pre_dst_width = source_x / scaler->pre_h_ratio;
175 scaler->pre_dst_height = source_y / scaler->pre_v_ratio;
176
177 scaler->main_h_ratio = (source_x << 8) / (target_x << scaler->h_shift);
178 scaler->main_v_ratio = (source_y << 8) / (target_y << scaler->v_shift);
179
180 scaler->scaleup_h = (target_x >= source_x);
181 scaler->scaleup_v = (target_y >= source_y);
182
183 scaler->copy = 0;
184
185 pr_debug("H: ratio: %u, shift: %u. V: ratio: %u, shift: %u.\n",
186 scaler->pre_h_ratio, scaler->h_shift,
187 scaler->pre_v_ratio, scaler->v_shift);
188
189 pr_debug("Source: %dx%d, Target: %dx%d, scaleup_h/v: %d/%d\n",
190 source_x, source_y, target_x, target_y,
191 scaler->scaleup_h, scaler->scaleup_v);
192
193 return 0;
194}
195
196static int camif_register_sensor(struct camif_dev *camif)
197{
198 struct s3c_camif_sensor_info *sensor = &camif->pdata.sensor;
199 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
200 struct i2c_adapter *adapter;
201 struct v4l2_subdev_format format;
202 struct v4l2_subdev *sd;
203 int ret;
204
205 camif->sensor.sd = NULL;
206
207 if (sensor->i2c_board_info.addr == 0)
208 return -EINVAL;
209
210 adapter = i2c_get_adapter(sensor->i2c_bus_num);
211 if (adapter == NULL) {
212 v4l2_warn(v4l2_dev, "failed to get I2C adapter %d\n",
213 sensor->i2c_bus_num);
214 return -EPROBE_DEFER;
215 }
216
217 sd = v4l2_i2c_new_subdev_board(v4l2_dev, adapter,
218 &sensor->i2c_board_info, NULL);
219 if (sd == NULL) {
220 i2c_put_adapter(adapter);
221 v4l2_warn(v4l2_dev, "failed to acquire subdev %s\n",
222 sensor->i2c_board_info.type);
223 return -EPROBE_DEFER;
224 }
225 camif->sensor.sd = sd;
226
227 v4l2_info(v4l2_dev, "registered sensor subdevice %s\n", sd->name);
228
229
230 format.pad = 0;
231 format.which = V4L2_SUBDEV_FORMAT_ACTIVE;
232 ret = v4l2_subdev_call(sd, pad, get_fmt, NULL, &format);
233
234 if (ret < 0)
235 return 0;
236
237 format.pad = CAMIF_SD_PAD_SINK;
238 v4l2_subdev_call(&camif->subdev, pad, set_fmt, NULL, &format);
239
240 v4l2_info(sd, "Initial format from sensor: %dx%d, %#x\n",
241 format.format.width, format.format.height,
242 format.format.code);
243 return 0;
244}
245
246static void camif_unregister_sensor(struct camif_dev *camif)
247{
248 struct v4l2_subdev *sd = camif->sensor.sd;
249 struct i2c_client *client = sd ? v4l2_get_subdevdata(sd) : NULL;
250 struct i2c_adapter *adapter;
251
252 if (client == NULL)
253 return;
254
255 adapter = client->adapter;
256 v4l2_device_unregister_subdev(sd);
257 camif->sensor.sd = NULL;
258 i2c_unregister_device(client);
259 i2c_put_adapter(adapter);
260}
261
262static int camif_create_media_links(struct camif_dev *camif)
263{
264 int i, ret;
265
266 ret = media_create_pad_link(&camif->sensor.sd->entity, 0,
267 &camif->subdev.entity, CAMIF_SD_PAD_SINK,
268 MEDIA_LNK_FL_IMMUTABLE |
269 MEDIA_LNK_FL_ENABLED);
270 if (ret)
271 return ret;
272
273 for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
274 ret = media_create_pad_link(&camif->subdev.entity, i,
275 &camif->vp[i - 1].vdev.entity, 0,
276 MEDIA_LNK_FL_IMMUTABLE |
277 MEDIA_LNK_FL_ENABLED);
278 }
279
280 return ret;
281}
282
283static int camif_register_video_nodes(struct camif_dev *camif)
284{
285 int ret = s3c_camif_register_video_node(camif, VP_CODEC);
286 if (ret < 0)
287 return ret;
288
289 return s3c_camif_register_video_node(camif, VP_PREVIEW);
290}
291
292static void camif_unregister_video_nodes(struct camif_dev *camif)
293{
294 s3c_camif_unregister_video_node(camif, VP_CODEC);
295 s3c_camif_unregister_video_node(camif, VP_PREVIEW);
296}
297
298static void camif_unregister_media_entities(struct camif_dev *camif)
299{
300 camif_unregister_video_nodes(camif);
301 camif_unregister_sensor(camif);
302 s3c_camif_unregister_subdev(camif);
303}
304
305
306
307
308static int camif_media_dev_init(struct camif_dev *camif)
309{
310 struct media_device *md = &camif->media_dev;
311 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
312 unsigned int ip_rev = camif->variant->ip_revision;
313 int ret;
314
315 memset(md, 0, sizeof(*md));
316 snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
317 ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
318 strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
319 md->hw_revision = ip_rev;
320
321 md->dev = camif->dev;
322
323 strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
324 v4l2_dev->mdev = md;
325
326 media_device_init(md);
327
328 ret = v4l2_device_register(camif->dev, v4l2_dev);
329 if (ret < 0)
330 return ret;
331
332 return ret;
333}
334
335static void camif_clk_put(struct camif_dev *camif)
336{
337 int i;
338
339 for (i = 0; i < CLK_MAX_NUM; i++) {
340 if (IS_ERR(camif->clock[i]))
341 continue;
342 clk_unprepare(camif->clock[i]);
343 clk_put(camif->clock[i]);
344 camif->clock[i] = ERR_PTR(-EINVAL);
345 }
346}
347
348static int camif_clk_get(struct camif_dev *camif)
349{
350 int ret, i;
351
352 for (i = 1; i < CLK_MAX_NUM; i++)
353 camif->clock[i] = ERR_PTR(-EINVAL);
354
355 for (i = 0; i < CLK_MAX_NUM; i++) {
356 camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
357 if (IS_ERR(camif->clock[i])) {
358 ret = PTR_ERR(camif->clock[i]);
359 goto err;
360 }
361 ret = clk_prepare(camif->clock[i]);
362 if (ret < 0) {
363 clk_put(camif->clock[i]);
364 camif->clock[i] = NULL;
365 goto err;
366 }
367 }
368 return 0;
369err:
370 camif_clk_put(camif);
371 dev_err(camif->dev, "failed to get clock: %s\n",
372 camif_clocks[i]);
373 return ret;
374}
375
376
377
378
379
380
381static int camif_request_irqs(struct platform_device *pdev,
382 struct camif_dev *camif)
383{
384 int irq, ret, i;
385
386 for (i = 0; i < CAMIF_VP_NUM; i++) {
387 struct camif_vp *vp = &camif->vp[i];
388
389 init_waitqueue_head(&vp->irq_queue);
390
391 irq = platform_get_irq(pdev, i);
392 if (irq <= 0) {
393 dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
394 return -ENXIO;
395 }
396
397 ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
398 0, dev_name(&pdev->dev), vp);
399 if (ret < 0) {
400 dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
401 break;
402 }
403 }
404
405 return ret;
406}
407
408static int s3c_camif_probe(struct platform_device *pdev)
409{
410 struct device *dev = &pdev->dev;
411 struct s3c_camif_plat_data *pdata = dev->platform_data;
412 struct s3c_camif_drvdata *drvdata;
413 struct camif_dev *camif;
414 struct resource *mres;
415 int ret = 0;
416
417 camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
418 if (!camif)
419 return -ENOMEM;
420
421 spin_lock_init(&camif->slock);
422 mutex_init(&camif->lock);
423
424 camif->dev = dev;
425
426 if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
427 dev_err(dev, "wrong platform data\n");
428 return -EINVAL;
429 }
430
431 camif->pdata = *pdata;
432 drvdata = (void *)platform_get_device_id(pdev)->driver_data;
433 camif->variant = drvdata->variant;
434
435 mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
436
437 camif->io_base = devm_ioremap_resource(dev, mres);
438 if (IS_ERR(camif->io_base))
439 return PTR_ERR(camif->io_base);
440
441 ret = camif_request_irqs(pdev, camif);
442 if (ret < 0)
443 return ret;
444
445 ret = pdata->gpio_get();
446 if (ret < 0)
447 return ret;
448
449 ret = s3c_camif_create_subdev(camif);
450 if (ret < 0)
451 goto err_sd;
452
453 ret = camif_clk_get(camif);
454 if (ret < 0)
455 goto err_clk;
456
457 platform_set_drvdata(pdev, camif);
458 clk_set_rate(camif->clock[CLK_CAM],
459 camif->pdata.sensor.clock_frequency);
460
461 dev_info(dev, "sensor clock frequency: %lu\n",
462 clk_get_rate(camif->clock[CLK_CAM]));
463
464
465
466
467
468 s3c_camif_set_defaults(camif);
469
470 pm_runtime_enable(dev);
471
472 ret = pm_runtime_get_sync(dev);
473 if (ret < 0)
474 goto err_pm;
475
476 ret = camif_media_dev_init(camif);
477 if (ret < 0)
478 goto err_alloc;
479
480 ret = camif_register_sensor(camif);
481 if (ret < 0)
482 goto err_sens;
483
484 ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
485 if (ret < 0)
486 goto err_sens;
487
488 ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
489 if (ret < 0)
490 goto err_sens;
491
492 ret = camif_register_video_nodes(camif);
493 if (ret < 0)
494 goto err_sens;
495
496 ret = camif_create_media_links(camif);
497 if (ret < 0)
498 goto err_sens;
499
500 ret = media_device_register(&camif->media_dev);
501 if (ret < 0)
502 goto err_sens;
503
504 pm_runtime_put(dev);
505 return 0;
506
507err_sens:
508 v4l2_device_unregister(&camif->v4l2_dev);
509 media_device_unregister(&camif->media_dev);
510 media_device_cleanup(&camif->media_dev);
511 camif_unregister_media_entities(camif);
512err_alloc:
513 pm_runtime_put(dev);
514 pm_runtime_disable(dev);
515err_pm:
516 camif_clk_put(camif);
517err_clk:
518 s3c_camif_unregister_subdev(camif);
519err_sd:
520 pdata->gpio_put();
521 return ret;
522}
523
524static int s3c_camif_remove(struct platform_device *pdev)
525{
526 struct camif_dev *camif = platform_get_drvdata(pdev);
527 struct s3c_camif_plat_data *pdata = &camif->pdata;
528
529 media_device_unregister(&camif->media_dev);
530 media_device_cleanup(&camif->media_dev);
531 camif_unregister_media_entities(camif);
532 v4l2_device_unregister(&camif->v4l2_dev);
533
534 pm_runtime_disable(&pdev->dev);
535 camif_clk_put(camif);
536 pdata->gpio_put();
537
538 return 0;
539}
540
541static int s3c_camif_runtime_resume(struct device *dev)
542{
543 struct camif_dev *camif = dev_get_drvdata(dev);
544
545 clk_enable(camif->clock[CLK_GATE]);
546
547 clk_enable(camif->clock[CLK_CAM]);
548 return 0;
549}
550
551static int s3c_camif_runtime_suspend(struct device *dev)
552{
553 struct camif_dev *camif = dev_get_drvdata(dev);
554
555
556 clk_disable(camif->clock[CLK_CAM]);
557
558 clk_disable(camif->clock[CLK_GATE]);
559 return 0;
560}
561
562static const struct s3c_camif_variant s3c244x_camif_variant = {
563 .vp_pix_limits = {
564 [VP_CODEC] = {
565 .max_out_width = 4096,
566 .max_sc_out_width = 2048,
567 .out_width_align = 16,
568 .min_out_width = 16,
569 .max_height = 4096,
570 },
571 [VP_PREVIEW] = {
572 .max_out_width = 640,
573 .max_sc_out_width = 640,
574 .out_width_align = 16,
575 .min_out_width = 16,
576 .max_height = 480,
577 }
578 },
579 .pix_limits = {
580 .win_hor_offset_align = 8,
581 },
582 .ip_revision = S3C244X_CAMIF_IP_REV,
583};
584
585static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
586 .variant = &s3c244x_camif_variant,
587 .bus_clk_freq = 24000000UL,
588};
589
590static const struct s3c_camif_variant s3c6410_camif_variant = {
591 .vp_pix_limits = {
592 [VP_CODEC] = {
593 .max_out_width = 4096,
594 .max_sc_out_width = 2048,
595 .out_width_align = 16,
596 .min_out_width = 16,
597 .max_height = 4096,
598 },
599 [VP_PREVIEW] = {
600 .max_out_width = 4096,
601 .max_sc_out_width = 720,
602 .out_width_align = 16,
603 .min_out_width = 16,
604 .max_height = 4096,
605 }
606 },
607 .pix_limits = {
608 .win_hor_offset_align = 8,
609 },
610 .ip_revision = S3C6410_CAMIF_IP_REV,
611 .has_img_effect = 1,
612 .vp_offset = 0x20,
613};
614
615static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
616 .variant = &s3c6410_camif_variant,
617 .bus_clk_freq = 133000000UL,
618};
619
620static const struct platform_device_id s3c_camif_driver_ids[] = {
621 {
622 .name = "s3c2440-camif",
623 .driver_data = (unsigned long)&s3c244x_camif_drvdata,
624 }, {
625 .name = "s3c6410-camif",
626 .driver_data = (unsigned long)&s3c6410_camif_drvdata,
627 },
628 { },
629};
630MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
631
632static const struct dev_pm_ops s3c_camif_pm_ops = {
633 .runtime_suspend = s3c_camif_runtime_suspend,
634 .runtime_resume = s3c_camif_runtime_resume,
635};
636
637static struct platform_driver s3c_camif_driver = {
638 .probe = s3c_camif_probe,
639 .remove = s3c_camif_remove,
640 .id_table = s3c_camif_driver_ids,
641 .driver = {
642 .name = S3C_CAMIF_DRIVER_NAME,
643 .pm = &s3c_camif_pm_ops,
644 }
645};
646
647module_platform_driver(s3c_camif_driver);
648
649MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
650MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
651MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
652MODULE_LICENSE("GPL");
653
