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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-core.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 if (adapter)
260 i2c_put_adapter(adapter);
261}
262
263static int camif_create_media_links(struct camif_dev *camif)
264{
265 int i, ret;
266
267 ret = media_entity_create_link(&camif->sensor.sd->entity, 0,
268 &camif->subdev.entity, CAMIF_SD_PAD_SINK,
269 MEDIA_LNK_FL_IMMUTABLE |
270 MEDIA_LNK_FL_ENABLED);
271 if (ret)
272 return ret;
273
274 for (i = 1; i < CAMIF_SD_PADS_NUM && !ret; i++) {
275 ret = media_entity_create_link(&camif->subdev.entity, i,
276 &camif->vp[i - 1].vdev.entity, 0,
277 MEDIA_LNK_FL_IMMUTABLE |
278 MEDIA_LNK_FL_ENABLED);
279 }
280
281 return ret;
282}
283
284static int camif_register_video_nodes(struct camif_dev *camif)
285{
286 int ret = s3c_camif_register_video_node(camif, VP_CODEC);
287 if (ret < 0)
288 return ret;
289
290 return s3c_camif_register_video_node(camif, VP_PREVIEW);
291}
292
293static void camif_unregister_video_nodes(struct camif_dev *camif)
294{
295 s3c_camif_unregister_video_node(camif, VP_CODEC);
296 s3c_camif_unregister_video_node(camif, VP_PREVIEW);
297}
298
299static void camif_unregister_media_entities(struct camif_dev *camif)
300{
301 camif_unregister_video_nodes(camif);
302 camif_unregister_sensor(camif);
303 s3c_camif_unregister_subdev(camif);
304}
305
306
307
308
309static int camif_media_dev_register(struct camif_dev *camif)
310{
311 struct media_device *md = &camif->media_dev;
312 struct v4l2_device *v4l2_dev = &camif->v4l2_dev;
313 unsigned int ip_rev = camif->variant->ip_revision;
314 int ret;
315
316 memset(md, 0, sizeof(*md));
317 snprintf(md->model, sizeof(md->model), "SAMSUNG S3C%s CAMIF",
318 ip_rev == S3C6410_CAMIF_IP_REV ? "6410" : "244X");
319 strlcpy(md->bus_info, "platform", sizeof(md->bus_info));
320 md->hw_revision = ip_rev;
321 md->driver_version = KERNEL_VERSION(1, 0, 0);
322
323 md->dev = camif->dev;
324
325 strlcpy(v4l2_dev->name, "s3c-camif", sizeof(v4l2_dev->name));
326 v4l2_dev->mdev = md;
327
328 ret = v4l2_device_register(camif->dev, v4l2_dev);
329 if (ret < 0)
330 return ret;
331
332 ret = media_device_register(md);
333 if (ret < 0)
334 v4l2_device_unregister(v4l2_dev);
335
336 return ret;
337}
338
339static void camif_clk_put(struct camif_dev *camif)
340{
341 int i;
342
343 for (i = 0; i < CLK_MAX_NUM; i++) {
344 if (IS_ERR(camif->clock[i]))
345 continue;
346 clk_unprepare(camif->clock[i]);
347 clk_put(camif->clock[i]);
348 camif->clock[i] = ERR_PTR(-EINVAL);
349 }
350}
351
352static int camif_clk_get(struct camif_dev *camif)
353{
354 int ret, i;
355
356 for (i = 1; i < CLK_MAX_NUM; i++)
357 camif->clock[i] = ERR_PTR(-EINVAL);
358
359 for (i = 0; i < CLK_MAX_NUM; i++) {
360 camif->clock[i] = clk_get(camif->dev, camif_clocks[i]);
361 if (IS_ERR(camif->clock[i])) {
362 ret = PTR_ERR(camif->clock[i]);
363 goto err;
364 }
365 ret = clk_prepare(camif->clock[i]);
366 if (ret < 0) {
367 clk_put(camif->clock[i]);
368 camif->clock[i] = NULL;
369 goto err;
370 }
371 }
372 return 0;
373err:
374 camif_clk_put(camif);
375 dev_err(camif->dev, "failed to get clock: %s\n",
376 camif_clocks[i]);
377 return ret;
378}
379
380
381
382
383
384
385static int camif_request_irqs(struct platform_device *pdev,
386 struct camif_dev *camif)
387{
388 int irq, ret, i;
389
390 for (i = 0; i < CAMIF_VP_NUM; i++) {
391 struct camif_vp *vp = &camif->vp[i];
392
393 init_waitqueue_head(&vp->irq_queue);
394
395 irq = platform_get_irq(pdev, i);
396 if (irq <= 0) {
397 dev_err(&pdev->dev, "failed to get IRQ %d\n", i);
398 return -ENXIO;
399 }
400
401 ret = devm_request_irq(&pdev->dev, irq, s3c_camif_irq_handler,
402 0, dev_name(&pdev->dev), vp);
403 if (ret < 0) {
404 dev_err(&pdev->dev, "failed to install IRQ: %d\n", ret);
405 break;
406 }
407 }
408
409 return ret;
410}
411
412static int s3c_camif_probe(struct platform_device *pdev)
413{
414 struct device *dev = &pdev->dev;
415 struct s3c_camif_plat_data *pdata = dev->platform_data;
416 struct s3c_camif_drvdata *drvdata;
417 struct camif_dev *camif;
418 struct resource *mres;
419 int ret = 0;
420
421 camif = devm_kzalloc(dev, sizeof(*camif), GFP_KERNEL);
422 if (!camif)
423 return -ENOMEM;
424
425 spin_lock_init(&camif->slock);
426 mutex_init(&camif->lock);
427
428 camif->dev = dev;
429
430 if (!pdata || !pdata->gpio_get || !pdata->gpio_put) {
431 dev_err(dev, "wrong platform data\n");
432 return -EINVAL;
433 }
434
435 camif->pdata = *pdata;
436 drvdata = (void *)platform_get_device_id(pdev)->driver_data;
437 camif->variant = drvdata->variant;
438
439 mres = platform_get_resource(pdev, IORESOURCE_MEM, 0);
440
441 camif->io_base = devm_ioremap_resource(dev, mres);
442 if (IS_ERR(camif->io_base))
443 return PTR_ERR(camif->io_base);
444
445 ret = camif_request_irqs(pdev, camif);
446 if (ret < 0)
447 return ret;
448
449 ret = pdata->gpio_get();
450 if (ret < 0)
451 return ret;
452
453 ret = s3c_camif_create_subdev(camif);
454 if (ret < 0)
455 goto err_sd;
456
457 ret = camif_clk_get(camif);
458 if (ret < 0)
459 goto err_clk;
460
461 platform_set_drvdata(pdev, camif);
462 clk_set_rate(camif->clock[CLK_CAM],
463 camif->pdata.sensor.clock_frequency);
464
465 dev_info(dev, "sensor clock frequency: %lu\n",
466 clk_get_rate(camif->clock[CLK_CAM]));
467
468
469
470
471
472 s3c_camif_set_defaults(camif);
473
474 pm_runtime_enable(dev);
475
476 ret = pm_runtime_get_sync(dev);
477 if (ret < 0)
478 goto err_pm;
479
480
481 camif->alloc_ctx = vb2_dma_contig_init_ctx(dev);
482 if (IS_ERR(camif->alloc_ctx)) {
483 ret = PTR_ERR(camif->alloc_ctx);
484 goto err_alloc;
485 }
486
487 ret = camif_media_dev_register(camif);
488 if (ret < 0)
489 goto err_mdev;
490
491 ret = camif_register_sensor(camif);
492 if (ret < 0)
493 goto err_sens;
494
495 ret = v4l2_device_register_subdev(&camif->v4l2_dev, &camif->subdev);
496 if (ret < 0)
497 goto err_sens;
498
499 mutex_lock(&camif->media_dev.graph_mutex);
500
501 ret = v4l2_device_register_subdev_nodes(&camif->v4l2_dev);
502 if (ret < 0)
503 goto err_unlock;
504
505 ret = camif_register_video_nodes(camif);
506 if (ret < 0)
507 goto err_unlock;
508
509 ret = camif_create_media_links(camif);
510 if (ret < 0)
511 goto err_unlock;
512
513 mutex_unlock(&camif->media_dev.graph_mutex);
514 pm_runtime_put(dev);
515 return 0;
516
517err_unlock:
518 mutex_unlock(&camif->media_dev.graph_mutex);
519err_sens:
520 v4l2_device_unregister(&camif->v4l2_dev);
521 media_device_unregister(&camif->media_dev);
522 camif_unregister_media_entities(camif);
523err_mdev:
524 vb2_dma_contig_cleanup_ctx(camif->alloc_ctx);
525err_alloc:
526 pm_runtime_put(dev);
527 pm_runtime_disable(dev);
528err_pm:
529 camif_clk_put(camif);
530err_clk:
531 s3c_camif_unregister_subdev(camif);
532err_sd:
533 pdata->gpio_put();
534 return ret;
535}
536
537static int s3c_camif_remove(struct platform_device *pdev)
538{
539 struct camif_dev *camif = platform_get_drvdata(pdev);
540 struct s3c_camif_plat_data *pdata = &camif->pdata;
541
542 media_device_unregister(&camif->media_dev);
543 camif_unregister_media_entities(camif);
544 v4l2_device_unregister(&camif->v4l2_dev);
545
546 pm_runtime_disable(&pdev->dev);
547 camif_clk_put(camif);
548 pdata->gpio_put();
549
550 return 0;
551}
552
553static int s3c_camif_runtime_resume(struct device *dev)
554{
555 struct camif_dev *camif = dev_get_drvdata(dev);
556
557 clk_enable(camif->clock[CLK_GATE]);
558
559 clk_enable(camif->clock[CLK_CAM]);
560 return 0;
561}
562
563static int s3c_camif_runtime_suspend(struct device *dev)
564{
565 struct camif_dev *camif = dev_get_drvdata(dev);
566
567
568 clk_disable(camif->clock[CLK_CAM]);
569
570 clk_disable(camif->clock[CLK_GATE]);
571 return 0;
572}
573
574static const struct s3c_camif_variant s3c244x_camif_variant = {
575 .vp_pix_limits = {
576 [VP_CODEC] = {
577 .max_out_width = 4096,
578 .max_sc_out_width = 2048,
579 .out_width_align = 16,
580 .min_out_width = 16,
581 .max_height = 4096,
582 },
583 [VP_PREVIEW] = {
584 .max_out_width = 640,
585 .max_sc_out_width = 640,
586 .out_width_align = 16,
587 .min_out_width = 16,
588 .max_height = 480,
589 }
590 },
591 .pix_limits = {
592 .win_hor_offset_align = 8,
593 },
594 .ip_revision = S3C244X_CAMIF_IP_REV,
595};
596
597static struct s3c_camif_drvdata s3c244x_camif_drvdata = {
598 .variant = &s3c244x_camif_variant,
599 .bus_clk_freq = 24000000UL,
600};
601
602static const struct s3c_camif_variant s3c6410_camif_variant = {
603 .vp_pix_limits = {
604 [VP_CODEC] = {
605 .max_out_width = 4096,
606 .max_sc_out_width = 2048,
607 .out_width_align = 16,
608 .min_out_width = 16,
609 .max_height = 4096,
610 },
611 [VP_PREVIEW] = {
612 .max_out_width = 4096,
613 .max_sc_out_width = 720,
614 .out_width_align = 16,
615 .min_out_width = 16,
616 .max_height = 4096,
617 }
618 },
619 .pix_limits = {
620 .win_hor_offset_align = 8,
621 },
622 .ip_revision = S3C6410_CAMIF_IP_REV,
623 .has_img_effect = 1,
624 .vp_offset = 0x20,
625};
626
627static struct s3c_camif_drvdata s3c6410_camif_drvdata = {
628 .variant = &s3c6410_camif_variant,
629 .bus_clk_freq = 133000000UL,
630};
631
632static struct platform_device_id s3c_camif_driver_ids[] = {
633 {
634 .name = "s3c2440-camif",
635 .driver_data = (unsigned long)&s3c244x_camif_drvdata,
636 }, {
637 .name = "s3c6410-camif",
638 .driver_data = (unsigned long)&s3c6410_camif_drvdata,
639 },
640 { },
641};
642MODULE_DEVICE_TABLE(platform, s3c_camif_driver_ids);
643
644static const struct dev_pm_ops s3c_camif_pm_ops = {
645 .runtime_suspend = s3c_camif_runtime_suspend,
646 .runtime_resume = s3c_camif_runtime_resume,
647};
648
649static struct platform_driver s3c_camif_driver = {
650 .probe = s3c_camif_probe,
651 .remove = s3c_camif_remove,
652 .id_table = s3c_camif_driver_ids,
653 .driver = {
654 .name = S3C_CAMIF_DRIVER_NAME,
655 .owner = THIS_MODULE,
656 .pm = &s3c_camif_pm_ops,
657 }
658};
659
660module_platform_driver(s3c_camif_driver);
661
662MODULE_AUTHOR("Sylwester Nawrocki <sylvester.nawrocki@gmail.com>");
663MODULE_AUTHOR("Tomasz Figa <tomasz.figa@gmail.com>");
664MODULE_DESCRIPTION("S3C24XX/S3C64XX SoC camera interface driver");
665MODULE_LICENSE("GPL");
666
