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1/*
2 * S5P/EXYNOS4 SoC series camera host interface media device driver
3 *
4 * Copyright (C) 2011 Samsung Electronics Co., Ltd.
5 * Contact: Sylwester Nawrocki, <s.nawrocki@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published
9 * by the Free Software Foundation, either version 2 of the License,
10 * or (at your option) any later version.
11 */
12
13#include <linux/bug.h>
14#include <linux/device.h>
15#include <linux/errno.h>
16#include <linux/i2c.h>
17#include <linux/kernel.h>
18#include <linux/list.h>
19#include <linux/module.h>
20#include <linux/platform_device.h>
21#include <linux/pm_runtime.h>
22#include <linux/types.h>
23#include <linux/slab.h>
24#include <media/v4l2-ctrls.h>
25#include <media/media-device.h>
26
27#include "fimc-core.h"
28#include "fimc-lite.h"
29#include "fimc-mdevice.h"
30#include "mipi-csis.h"
31
32static int __fimc_md_set_camclk(struct fimc_md *fmd,
33 struct fimc_sensor_info *s_info,
34 bool on);
35/**
36 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
37 * @fimc: fimc device terminating the pipeline
38 *
39 * Caller holds the graph mutex.
40 */
41void fimc_pipeline_prepare(struct fimc_pipeline *p, struct media_entity *me)
42{
43 struct media_pad *pad = &me->pads[0];
44 struct v4l2_subdev *sd;
45 int i;
46
47 for (i = 0; i < IDX_MAX; i++)
48 p->subdevs[i] = NULL;
49
50 while (1) {
51 if (!(pad->flags & MEDIA_PAD_FL_SINK))
52 break;
53
54 /* source pad */
55 pad = media_entity_remote_source(pad);
56 if (pad == NULL ||
57 media_entity_type(pad->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
58 break;
59
60 sd = media_entity_to_v4l2_subdev(pad->entity);
61
62 switch (sd->grp_id) {
63 case SENSOR_GROUP_ID:
64 p->subdevs[IDX_SENSOR] = sd;
65 break;
66 case CSIS_GROUP_ID:
67 p->subdevs[IDX_CSIS] = sd;
68 break;
69 case FLITE_GROUP_ID:
70 p->subdevs[IDX_FLITE] = sd;
71 break;
72 case FIMC_GROUP_ID:
73 /* No need to control FIMC subdev through subdev ops */
74 break;
75 default:
76 pr_warn("%s: Unknown subdev grp_id: %#x\n",
77 __func__, sd->grp_id);
78 }
79 /* sink pad */
80 pad = &sd->entity.pads[0];
81 }
82}
83
84/**
85 * __subdev_set_power - change power state of a single subdev
86 * @sd: subdevice to change power state for
87 * @on: 1 to enable power or 0 to disable
88 *
89 * Return result of s_power subdev operation or -ENXIO if sd argument
90 * is NULL. Return 0 if the subdevice does not implement s_power.
91 */
92static int __subdev_set_power(struct v4l2_subdev *sd, int on)
93{
94 int *use_count;
95 int ret;
96
97 if (sd == NULL)
98 return -ENXIO;
99
100 use_count = &sd->entity.use_count;
101 if (on && (*use_count)++ > 0)
102 return 0;
103 else if (!on && (*use_count == 0 || --(*use_count) > 0))
104 return 0;
105 ret = v4l2_subdev_call(sd, core, s_power, on);
106
107 return ret != -ENOIOCTLCMD ? ret : 0;
108}
109
110/**
111 * fimc_pipeline_s_power - change power state of all pipeline subdevs
112 * @fimc: fimc device terminating the pipeline
113 * @state: true to power on, false to power off
114 *
115 * Needs to be called with the graph mutex held.
116 */
117int fimc_pipeline_s_power(struct fimc_pipeline *p, bool state)
118{
119 unsigned int i;
120 int ret;
121
122 if (p->subdevs[IDX_SENSOR] == NULL)
123 return -ENXIO;
124
125 for (i = 0; i < IDX_MAX; i++) {
126 unsigned int idx = state ? (IDX_MAX - 1) - i : i;
127
128 ret = __subdev_set_power(p->subdevs[idx], state);
129 if (ret < 0 && ret != -ENXIO)
130 return ret;
131 }
132
133 return 0;
134}
135
136/**
137 * __fimc_pipeline_initialize - update the pipeline information, enable power
138 * of all pipeline subdevs and the sensor clock
139 * @me: media entity to start graph walk with
140 * @prep: true to acquire sensor (and csis) subdevs
141 *
142 * This function must be called with the graph mutex held.
143 */
144static int __fimc_pipeline_initialize(struct fimc_pipeline *p,
145 struct media_entity *me, bool prep)
146{
147 int ret;
148
149 if (prep)
150 fimc_pipeline_prepare(p, me);
151
152 if (p->subdevs[IDX_SENSOR] == NULL)
153 return -EINVAL;
154
155 ret = fimc_md_set_camclk(p->subdevs[IDX_SENSOR], true);
156 if (ret)
157 return ret;
158
159 return fimc_pipeline_s_power(p, 1);
160}
161
162int fimc_pipeline_initialize(struct fimc_pipeline *p, struct media_entity *me,
163 bool prep)
164{
165 int ret;
166
167 mutex_lock(&me->parent->graph_mutex);
168 ret = __fimc_pipeline_initialize(p, me, prep);
169 mutex_unlock(&me->parent->graph_mutex);
170
171 return ret;
172}
173EXPORT_SYMBOL_GPL(fimc_pipeline_initialize);
174
175/**
176 * __fimc_pipeline_shutdown - disable the sensor clock and pipeline power
177 * @fimc: fimc device terminating the pipeline
178 *
179 * Disable power of all subdevs in the pipeline and turn off the external
180 * sensor clock.
181 * Called with the graph mutex held.
182 */
183int __fimc_pipeline_shutdown(struct fimc_pipeline *p)
184{
185 int ret = 0;
186
187 if (p->subdevs[IDX_SENSOR]) {
188 ret = fimc_pipeline_s_power(p, 0);
189 fimc_md_set_camclk(p->subdevs[IDX_SENSOR], false);
190 }
191 return ret == -ENXIO ? 0 : ret;
192}
193
194int fimc_pipeline_shutdown(struct fimc_pipeline *p)
195{
196 struct media_entity *me;
197 int ret;
198
199 if (!p || !p->subdevs[IDX_SENSOR])
200 return -EINVAL;
201
202 me = &p->subdevs[IDX_SENSOR]->entity;
203 mutex_lock(&me->parent->graph_mutex);
204 ret = __fimc_pipeline_shutdown(p);
205 mutex_unlock(&me->parent->graph_mutex);
206
207 return ret;
208}
209EXPORT_SYMBOL_GPL(fimc_pipeline_shutdown);
210
211/**
212 * fimc_pipeline_s_stream - invoke s_stream on pipeline subdevs
213 * @pipeline: video pipeline structure
214 * @on: passed as the s_stream call argument
215 */
216int fimc_pipeline_s_stream(struct fimc_pipeline *p, bool on)
217{
218 int i, ret;
219
220 if (p->subdevs[IDX_SENSOR] == NULL)
221 return -ENODEV;
222
223 for (i = 0; i < IDX_MAX; i++) {
224 unsigned int idx = on ? (IDX_MAX - 1) - i : i;
225
226 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
227
228 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
229 return ret;
230 }
231
232 return 0;
233
234}
235EXPORT_SYMBOL_GPL(fimc_pipeline_s_stream);
236
237/*
238 * Sensor subdevice helper functions
239 */
240static struct v4l2_subdev *fimc_md_register_sensor(struct fimc_md *fmd,
241 struct fimc_sensor_info *s_info)
242{
243 struct i2c_adapter *adapter;
244 struct v4l2_subdev *sd = NULL;
245
246 if (!s_info || !fmd)
247 return NULL;
248
249 adapter = i2c_get_adapter(s_info->pdata->i2c_bus_num);
250 if (!adapter) {
251 v4l2_warn(&fmd->v4l2_dev,
252 "Failed to get I2C adapter %d, deferring probe\n",
253 s_info->pdata->i2c_bus_num);
254 return ERR_PTR(-EPROBE_DEFER);
255 }
256 sd = v4l2_i2c_new_subdev_board(&fmd->v4l2_dev, adapter,
257 s_info->pdata->board_info, NULL);
258 if (IS_ERR_OR_NULL(sd)) {
259 i2c_put_adapter(adapter);
260 v4l2_warn(&fmd->v4l2_dev,
261 "Failed to acquire subdev %s, deferring probe\n",
262 s_info->pdata->board_info->type);
263 return ERR_PTR(-EPROBE_DEFER);
264 }
265 v4l2_set_subdev_hostdata(sd, s_info);
266 sd->grp_id = SENSOR_GROUP_ID;
267
268 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice %s\n",
269 s_info->pdata->board_info->type);
270 return sd;
271}
272
273static void fimc_md_unregister_sensor(struct v4l2_subdev *sd)
274{
275 struct i2c_client *client = v4l2_get_subdevdata(sd);
276 struct i2c_adapter *adapter;
277
278 if (!client)
279 return;
280 v4l2_device_unregister_subdev(sd);
281 adapter = client->adapter;
282 i2c_unregister_device(client);
283 if (adapter)
284 i2c_put_adapter(adapter);
285}
286
287static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
288{
289 struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
290 struct fimc_dev *fd = NULL;
291 int num_clients, ret, i;
292
293 /*
294 * Runtime resume one of the FIMC entities to make sure
295 * the sclk_cam clocks are not globally disabled.
296 */
297 for (i = 0; !fd && i < ARRAY_SIZE(fmd->fimc); i++)
298 if (fmd->fimc[i])
299 fd = fmd->fimc[i];
300 if (!fd)
301 return -ENXIO;
302 ret = pm_runtime_get_sync(&fd->pdev->dev);
303 if (ret < 0)
304 return ret;
305
306 WARN_ON(pdata->num_clients > ARRAY_SIZE(fmd->sensor));
307 num_clients = min_t(u32, pdata->num_clients, ARRAY_SIZE(fmd->sensor));
308
309 fmd->num_sensors = num_clients;
310 for (i = 0; i < num_clients; i++) {
311 struct v4l2_subdev *sd;
312
313 fmd->sensor[i].pdata = &pdata->isp_info[i];
314 ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], true);
315 if (ret)
316 break;
317 sd = fimc_md_register_sensor(fmd, &fmd->sensor[i]);
318 ret = __fimc_md_set_camclk(fmd, &fmd->sensor[i], false);
319
320 if (!IS_ERR(sd)) {
321 fmd->sensor[i].subdev = sd;
322 } else {
323 fmd->sensor[i].subdev = NULL;
324 ret = PTR_ERR(sd);
325 break;
326 }
327 if (ret)
328 break;
329 }
330 pm_runtime_put(&fd->pdev->dev);
331 return ret;
332}
333
334/*
335 * MIPI CSIS and FIMC platform devices registration.
336 */
337static int fimc_register_callback(struct device *dev, void *p)
338{
339 struct fimc_dev *fimc = dev_get_drvdata(dev);
340 struct v4l2_subdev *sd = &fimc->vid_cap.subdev;
341 struct fimc_md *fmd = p;
342 int ret = 0;
343
344 if (!fimc || !fimc->pdev)
345 return 0;
346
347 if (fimc->pdev->id < 0 || fimc->pdev->id >= FIMC_MAX_DEVS)
348 return 0;
349
350 fmd->fimc[fimc->pdev->id] = fimc;
351 sd->grp_id = FIMC_GROUP_ID;
352
353 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
354 if (ret) {
355 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
356 fimc->id, ret);
357 }
358
359 return ret;
360}
361
362static int fimc_lite_register_callback(struct device *dev, void *p)
363{
364 struct fimc_lite *fimc = dev_get_drvdata(dev);
365 struct v4l2_subdev *sd = &fimc->subdev;
366 struct fimc_md *fmd = p;
367 int ret;
368
369 if (fimc == NULL)
370 return 0;
371
372 if (fimc->index >= FIMC_LITE_MAX_DEVS)
373 return 0;
374
375 fmd->fimc_lite[fimc->index] = fimc;
376 sd->grp_id = FLITE_GROUP_ID;
377
378 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
379 if (ret) {
380 v4l2_err(&fmd->v4l2_dev,
381 "Failed to register FIMC-LITE.%d (%d)\n",
382 fimc->index, ret);
383 }
384 return ret;
385}
386
387static int csis_register_callback(struct device *dev, void *p)
388{
389 struct v4l2_subdev *sd = dev_get_drvdata(dev);
390 struct platform_device *pdev;
391 struct fimc_md *fmd = p;
392 int id, ret;
393
394 if (!sd)
395 return 0;
396 pdev = v4l2_get_subdevdata(sd);
397 if (!pdev || pdev->id < 0 || pdev->id >= CSIS_MAX_ENTITIES)
398 return 0;
399 v4l2_info(sd, "csis%d sd: %s\n", pdev->id, sd->name);
400
401 id = pdev->id < 0 ? 0 : pdev->id;
402 fmd->csis[id].sd = sd;
403 sd->grp_id = CSIS_GROUP_ID;
404 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
405 if (ret)
406 v4l2_err(&fmd->v4l2_dev,
407 "Failed to register CSIS subdevice: %d\n", ret);
408 return ret;
409}
410
411/**
412 * fimc_md_register_platform_entities - register FIMC and CSIS media entities
413 */
414static int fimc_md_register_platform_entities(struct fimc_md *fmd)
415{
416 struct s5p_platform_fimc *pdata = fmd->pdev->dev.platform_data;
417 struct device_driver *driver;
418 int ret, i;
419
420 driver = driver_find(FIMC_MODULE_NAME, &platform_bus_type);
421 if (!driver) {
422 v4l2_warn(&fmd->v4l2_dev,
423 "%s driver not found, deffering probe\n",
424 FIMC_MODULE_NAME);
425 return -EPROBE_DEFER;
426 }
427
428 ret = driver_for_each_device(driver, NULL, fmd,
429 fimc_register_callback);
430 if (ret)
431 return ret;
432
433 driver = driver_find(FIMC_LITE_DRV_NAME, &platform_bus_type);
434 if (driver && try_module_get(driver->owner)) {
435 ret = driver_for_each_device(driver, NULL, fmd,
436 fimc_lite_register_callback);
437 if (ret)
438 return ret;
439 module_put(driver->owner);
440 }
441 /*
442 * Check if there is any sensor on the MIPI-CSI2 bus and
443 * if not skip the s5p-csis module loading.
444 */
445 if (pdata == NULL)
446 return 0;
447 for (i = 0; i < pdata->num_clients; i++) {
448 if (pdata->isp_info[i].bus_type == FIMC_MIPI_CSI2) {
449 ret = 1;
450 break;
451 }
452 }
453 if (!ret)
454 return 0;
455
456 driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type);
457 if (!driver || !try_module_get(driver->owner)) {
458 v4l2_warn(&fmd->v4l2_dev,
459 "%s driver not found, deffering probe\n",
460 CSIS_DRIVER_NAME);
461 return -EPROBE_DEFER;
462 }
463
464 return driver_for_each_device(driver, NULL, fmd,
465 csis_register_callback);
466}
467
468static void fimc_md_unregister_entities(struct fimc_md *fmd)
469{
470 int i;
471
472 for (i = 0; i < FIMC_MAX_DEVS; i++) {
473 if (fmd->fimc[i] == NULL)
474 continue;
475 v4l2_device_unregister_subdev(&fmd->fimc[i]->vid_cap.subdev);
476 fmd->fimc[i] = NULL;
477 }
478 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
479 if (fmd->fimc_lite[i] == NULL)
480 continue;
481 v4l2_device_unregister_subdev(&fmd->fimc_lite[i]->subdev);
482 fmd->fimc_lite[i] = NULL;
483 }
484 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
485 if (fmd->csis[i].sd == NULL)
486 continue;
487 v4l2_device_unregister_subdev(fmd->csis[i].sd);
488 module_put(fmd->csis[i].sd->owner);
489 fmd->csis[i].sd = NULL;
490 }
491 for (i = 0; i < fmd->num_sensors; i++) {
492 if (fmd->sensor[i].subdev == NULL)
493 continue;
494 fimc_md_unregister_sensor(fmd->sensor[i].subdev);
495 fmd->sensor[i].subdev = NULL;
496 }
497}
498
499/**
500 * __fimc_md_create_fimc_links - create links to all FIMC entities
501 * @fmd: fimc media device
502 * @source: the source entity to create links to all fimc entities from
503 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
504 * @pad: the source entity pad index
505 * @link_mask: bitmask of the fimc devices for which link should be enabled
506 */
507static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
508 struct media_entity *source,
509 struct v4l2_subdev *sensor,
510 int pad, int link_mask)
511{
512 struct fimc_sensor_info *s_info;
513 struct media_entity *sink;
514 unsigned int flags = 0;
515 int ret, i;
516
517 for (i = 0; i < FIMC_MAX_DEVS; i++) {
518 if (!fmd->fimc[i])
519 continue;
520 /*
521 * Some FIMC variants are not fitted with camera capture
522 * interface. Skip creating a link from sensor for those.
523 */
524 if (!fmd->fimc[i]->variant->has_cam_if)
525 continue;
526
527 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
528
529 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
530 ret = media_entity_create_link(source, pad, sink,
531 FIMC_SD_PAD_SINK, flags);
532 if (ret)
533 return ret;
534
535 /* Notify FIMC capture subdev entity */
536 ret = media_entity_call(sink, link_setup, &sink->pads[0],
537 &source->pads[pad], flags);
538 if (ret)
539 break;
540
541 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
542 source->name, flags ? '=' : '-', sink->name);
543
544 if (flags == 0 || sensor == NULL)
545 continue;
546 s_info = v4l2_get_subdev_hostdata(sensor);
547 if (!WARN_ON(s_info == NULL)) {
548 unsigned long irq_flags;
549 spin_lock_irqsave(&fmd->slock, irq_flags);
550 s_info->host = fmd->fimc[i];
551 spin_unlock_irqrestore(&fmd->slock, irq_flags);
552 }
553 }
554
555 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
556 if (!fmd->fimc_lite[i])
557 continue;
558
559 if (link_mask & (1 << (i + FIMC_MAX_DEVS)))
560 flags = MEDIA_LNK_FL_ENABLED;
561 else
562 flags = 0;
563
564 sink = &fmd->fimc_lite[i]->subdev.entity;
565 ret = media_entity_create_link(source, pad, sink,
566 FLITE_SD_PAD_SINK, flags);
567 if (ret)
568 return ret;
569
570 /* Notify FIMC-LITE subdev entity */
571 ret = media_entity_call(sink, link_setup, &sink->pads[0],
572 &source->pads[pad], flags);
573 if (ret)
574 break;
575
576 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]",
577 source->name, flags ? '=' : '-', sink->name);
578 }
579 return 0;
580}
581
582/* Create links from FIMC-LITE source pads to other entities */
583static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
584{
585 struct media_entity *source, *sink;
586 unsigned int flags = MEDIA_LNK_FL_ENABLED;
587 int i, ret;
588
589 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
590 struct fimc_lite *fimc = fmd->fimc_lite[i];
591 if (fimc == NULL)
592 continue;
593 source = &fimc->subdev.entity;
594 sink = &fimc->vfd->entity;
595 /* FIMC-LITE's subdev and video node */
596 ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
597 sink, 0, flags);
598 if (ret)
599 break;
600 /* TODO: create links to other entities */
601 }
602
603 return ret;
604}
605
606/**
607 * fimc_md_create_links - create default links between registered entities
608 *
609 * Parallel interface sensor entities are connected directly to FIMC capture
610 * entities. The sensors using MIPI CSIS bus are connected through immutable
611 * link with CSI receiver entity specified by mux_id. Any registered CSIS
612 * entity has a link to each registered FIMC capture entity. Enabled links
613 * are created by default between each subsequent registered sensor and
614 * subsequent FIMC capture entity. The number of default active links is
615 * determined by the number of available sensors or FIMC entities,
616 * whichever is less.
617 */
618static int fimc_md_create_links(struct fimc_md *fmd)
619{
620 struct v4l2_subdev *sensor, *csis;
621 struct s5p_fimc_isp_info *pdata;
622 struct fimc_sensor_info *s_info;
623 struct media_entity *source, *sink;
624 int i, pad, fimc_id = 0, ret = 0;
625 u32 flags, link_mask = 0;
626
627 for (i = 0; i < fmd->num_sensors; i++) {
628 if (fmd->sensor[i].subdev == NULL)
629 continue;
630
631 sensor = fmd->sensor[i].subdev;
632 s_info = v4l2_get_subdev_hostdata(sensor);
633 if (!s_info || !s_info->pdata)
634 continue;
635
636 source = NULL;
637 pdata = s_info->pdata;
638
639 switch (pdata->bus_type) {
640 case FIMC_MIPI_CSI2:
641 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
642 "Wrong CSI channel id: %d\n", pdata->mux_id))
643 return -EINVAL;
644
645 csis = fmd->csis[pdata->mux_id].sd;
646 if (WARN(csis == NULL,
647 "MIPI-CSI interface specified "
648 "but s5p-csis module is not loaded!\n"))
649 return -EINVAL;
650
651 ret = media_entity_create_link(&sensor->entity, 0,
652 &csis->entity, CSIS_PAD_SINK,
653 MEDIA_LNK_FL_IMMUTABLE |
654 MEDIA_LNK_FL_ENABLED);
655 if (ret)
656 return ret;
657
658 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]",
659 sensor->entity.name, csis->entity.name);
660
661 source = NULL;
662 break;
663
664 case FIMC_ITU_601...FIMC_ITU_656:
665 source = &sensor->entity;
666 pad = 0;
667 break;
668
669 default:
670 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
671 pdata->bus_type);
672 return -EINVAL;
673 }
674 if (source == NULL)
675 continue;
676
677 link_mask = 1 << fimc_id++;
678 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
679 pad, link_mask);
680 }
681
682 for (i = 0; i < ARRAY_SIZE(fmd->csis); i++) {
683 if (fmd->csis[i].sd == NULL)
684 continue;
685 source = &fmd->csis[i].sd->entity;
686 pad = CSIS_PAD_SOURCE;
687
688 link_mask = 1 << fimc_id++;
689 ret = __fimc_md_create_fimc_sink_links(fmd, source, NULL,
690 pad, link_mask);
691 }
692
693 /* Create immutable links between each FIMC's subdev and video node */
694 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
695 for (i = 0; i < FIMC_MAX_DEVS; i++) {
696 if (!fmd->fimc[i])
697 continue;
698 source = &fmd->fimc[i]->vid_cap.subdev.entity;
699 sink = &fmd->fimc[i]->vid_cap.vfd->entity;
700 ret = media_entity_create_link(source, FIMC_SD_PAD_SOURCE,
701 sink, 0, flags);
702 if (ret)
703 break;
704 }
705
706 return __fimc_md_create_flite_source_links(fmd);
707}
708
709/*
710 * The peripheral sensor clock management.
711 */
712static int fimc_md_get_clocks(struct fimc_md *fmd)
713{
714 char clk_name[32];
715 struct clk *clock;
716 int i;
717
718 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
719 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
720 clock = clk_get(NULL, clk_name);
721 if (IS_ERR_OR_NULL(clock)) {
722 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s",
723 clk_name);
724 return -ENXIO;
725 }
726 fmd->camclk[i].clock = clock;
727 }
728 return 0;
729}
730
731static void fimc_md_put_clocks(struct fimc_md *fmd)
732{
733 int i = FIMC_MAX_CAMCLKS;
734
735 while (--i >= 0) {
736 if (IS_ERR_OR_NULL(fmd->camclk[i].clock))
737 continue;
738 clk_put(fmd->camclk[i].clock);
739 fmd->camclk[i].clock = NULL;
740 }
741}
742
743static int __fimc_md_set_camclk(struct fimc_md *fmd,
744 struct fimc_sensor_info *s_info,
745 bool on)
746{
747 struct s5p_fimc_isp_info *pdata = s_info->pdata;
748 struct fimc_camclk_info *camclk;
749 int ret = 0;
750
751 if (WARN_ON(pdata->clk_id >= FIMC_MAX_CAMCLKS) || fmd == NULL)
752 return -EINVAL;
753
754 camclk = &fmd->camclk[pdata->clk_id];
755
756 dbg("camclk %d, f: %lu, use_count: %d, on: %d",
757 pdata->clk_id, pdata->clk_frequency, camclk->use_count, on);
758
759 if (on) {
760 if (camclk->use_count > 0 &&
761 camclk->frequency != pdata->clk_frequency)
762 return -EINVAL;
763
764 if (camclk->use_count++ == 0) {
765 clk_set_rate(camclk->clock, pdata->clk_frequency);
766 camclk->frequency = pdata->clk_frequency;
767 ret = clk_enable(camclk->clock);
768 dbg("Enabled camclk %d: f: %lu", pdata->clk_id,
769 clk_get_rate(camclk->clock));
770 }
771 return ret;
772 }
773
774 if (WARN_ON(camclk->use_count == 0))
775 return 0;
776
777 if (--camclk->use_count == 0) {
778 clk_disable(camclk->clock);
779 dbg("Disabled camclk %d", pdata->clk_id);
780 }
781 return ret;
782}
783
784/**
785 * fimc_md_set_camclk - peripheral sensor clock setup
786 * @sd: sensor subdev to configure sclk_cam clock for
787 * @on: 1 to enable or 0 to disable the clock
788 *
789 * There are 2 separate clock outputs available in the SoC for external
790 * image processors. These clocks are shared between all registered FIMC
791 * devices to which sensors can be attached, either directly or through
792 * the MIPI CSI receiver. The clock is allowed here to be used by
793 * multiple sensors concurrently if they use same frequency.
794 * This function should only be called when the graph mutex is held.
795 */
796int fimc_md_set_camclk(struct v4l2_subdev *sd, bool on)
797{
798 struct fimc_sensor_info *s_info = v4l2_get_subdev_hostdata(sd);
799 struct fimc_md *fmd = entity_to_fimc_mdev(&sd->entity);
800
801 return __fimc_md_set_camclk(fmd, s_info, on);
802}
803
804static int fimc_md_link_notify(struct media_pad *source,
805 struct media_pad *sink, u32 flags)
806{
807 struct fimc_lite *fimc_lite = NULL;
808 struct fimc_dev *fimc = NULL;
809 struct fimc_pipeline *pipeline;
810 struct v4l2_subdev *sd;
811 int ret = 0;
812
813 if (media_entity_type(sink->entity) != MEDIA_ENT_T_V4L2_SUBDEV)
814 return 0;
815
816 sd = media_entity_to_v4l2_subdev(sink->entity);
817
818 switch (sd->grp_id) {
819 case FLITE_GROUP_ID:
820 fimc_lite = v4l2_get_subdevdata(sd);
821 pipeline = &fimc_lite->pipeline;
822 break;
823 case FIMC_GROUP_ID:
824 fimc = v4l2_get_subdevdata(sd);
825 pipeline = &fimc->pipeline;
826 break;
827 default:
828 return 0;
829 }
830
831 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
832 ret = __fimc_pipeline_shutdown(pipeline);
833 pipeline->subdevs[IDX_SENSOR] = NULL;
834 pipeline->subdevs[IDX_CSIS] = NULL;
835
836 if (fimc) {
837 mutex_lock(&fimc->lock);
838 fimc_ctrls_delete(fimc->vid_cap.ctx);
839 mutex_unlock(&fimc->lock);
840 }
841 return ret;
842 }
843 /*
844 * Link activation. Enable power of pipeline elements only if the
845 * pipeline is already in use, i.e. its video node is opened.
846 * Recreate the controls destroyed during the link deactivation.
847 */
848 if (fimc) {
849 mutex_lock(&fimc->lock);
850 if (fimc->vid_cap.refcnt > 0) {
851 ret = __fimc_pipeline_initialize(pipeline,
852 source->entity, true);
853 if (!ret)
854 ret = fimc_capture_ctrls_create(fimc);
855 }
856 mutex_unlock(&fimc->lock);
857 } else {
858 mutex_lock(&fimc_lite->lock);
859 if (fimc_lite->ref_count > 0) {
860 ret = __fimc_pipeline_initialize(pipeline,
861 source->entity, true);
862 }
863 mutex_unlock(&fimc_lite->lock);
864 }
865 return ret ? -EPIPE : ret;
866}
867
868static ssize_t fimc_md_sysfs_show(struct device *dev,
869 struct device_attribute *attr, char *buf)
870{
871 struct platform_device *pdev = to_platform_device(dev);
872 struct fimc_md *fmd = platform_get_drvdata(pdev);
873
874 if (fmd->user_subdev_api)
875 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
876
877 return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
878}
879
880static ssize_t fimc_md_sysfs_store(struct device *dev,
881 struct device_attribute *attr,
882 const char *buf, size_t count)
883{
884 struct platform_device *pdev = to_platform_device(dev);
885 struct fimc_md *fmd = platform_get_drvdata(pdev);
886 bool subdev_api;
887 int i;
888
889 if (!strcmp(buf, "vid-dev\n"))
890 subdev_api = false;
891 else if (!strcmp(buf, "sub-dev\n"))
892 subdev_api = true;
893 else
894 return count;
895
896 fmd->user_subdev_api = subdev_api;
897 for (i = 0; i < FIMC_MAX_DEVS; i++)
898 if (fmd->fimc[i])
899 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
900 return count;
901}
902/*
903 * This device attribute is to select video pipeline configuration method.
904 * There are following valid values:
905 * vid-dev - for V4L2 video node API only, subdevice will be configured
906 * by the host driver.
907 * sub-dev - for media controller API, subdevs must be configured in user
908 * space before starting streaming.
909 */
910static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
911 fimc_md_sysfs_show, fimc_md_sysfs_store);
912
913static int fimc_md_probe(struct platform_device *pdev)
914{
915 struct v4l2_device *v4l2_dev;
916 struct fimc_md *fmd;
917 int ret;
918
919 fmd = devm_kzalloc(&pdev->dev, sizeof(*fmd), GFP_KERNEL);
920 if (!fmd)
921 return -ENOMEM;
922
923 spin_lock_init(&fmd->slock);
924 fmd->pdev = pdev;
925
926 strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
927 sizeof(fmd->media_dev.model));
928 fmd->media_dev.link_notify = fimc_md_link_notify;
929 fmd->media_dev.dev = &pdev->dev;
930
931 v4l2_dev = &fmd->v4l2_dev;
932 v4l2_dev->mdev = &fmd->media_dev;
933 v4l2_dev->notify = fimc_sensor_notify;
934 snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s",
935 dev_name(&pdev->dev));
936
937 ret = v4l2_device_register(&pdev->dev, &fmd->v4l2_dev);
938 if (ret < 0) {
939 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
940 return ret;
941 }
942 ret = media_device_register(&fmd->media_dev);
943 if (ret < 0) {
944 v4l2_err(v4l2_dev, "Failed to register media device: %d\n", ret);
945 goto err_md;
946 }
947 ret = fimc_md_get_clocks(fmd);
948 if (ret)
949 goto err_clk;
950
951 fmd->user_subdev_api = false;
952
953 /* Protect the media graph while we're registering entities */
954 mutex_lock(&fmd->media_dev.graph_mutex);
955
956 ret = fimc_md_register_platform_entities(fmd);
957 if (ret)
958 goto err_unlock;
959
960 if (pdev->dev.platform_data) {
961 ret = fimc_md_register_sensor_entities(fmd);
962 if (ret)
963 goto err_unlock;
964 }
965 ret = fimc_md_create_links(fmd);
966 if (ret)
967 goto err_unlock;
968 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
969 if (ret)
970 goto err_unlock;
971
972 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
973 if (ret)
974 goto err_unlock;
975
976 platform_set_drvdata(pdev, fmd);
977 mutex_unlock(&fmd->media_dev.graph_mutex);
978 return 0;
979
980err_unlock:
981 mutex_unlock(&fmd->media_dev.graph_mutex);
982err_clk:
983 media_device_unregister(&fmd->media_dev);
984 fimc_md_put_clocks(fmd);
985 fimc_md_unregister_entities(fmd);
986err_md:
987 v4l2_device_unregister(&fmd->v4l2_dev);
988 return ret;
989}
990
991static int __devexit fimc_md_remove(struct platform_device *pdev)
992{
993 struct fimc_md *fmd = platform_get_drvdata(pdev);
994
995 if (!fmd)
996 return 0;
997 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
998 fimc_md_unregister_entities(fmd);
999 media_device_unregister(&fmd->media_dev);
1000 fimc_md_put_clocks(fmd);
1001 return 0;
1002}
1003
1004static struct platform_driver fimc_md_driver = {
1005 .probe = fimc_md_probe,
1006 .remove = __devexit_p(fimc_md_remove),
1007 .driver = {
1008 .name = "s5p-fimc-md",
1009 .owner = THIS_MODULE,
1010 }
1011};
1012
1013int __init fimc_md_init(void)
1014{
1015 int ret;
1016
1017 request_module("s5p-csis");
1018 ret = fimc_register_driver();
1019 if (ret)
1020 return ret;
1021
1022 return platform_driver_register(&fimc_md_driver);
1023}
1024void __exit fimc_md_exit(void)
1025{
1026 platform_driver_unregister(&fimc_md_driver);
1027 fimc_unregister_driver();
1028}
1029
1030module_init(fimc_md_init);
1031module_exit(fimc_md_exit);
1032
1033MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1034MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1035MODULE_LICENSE("GPL");
1036MODULE_VERSION("2.0.1");