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Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux...
[linux/fpc-iii.git] / drivers / media / platform / exynos4-is / media-dev.c
blobfeb521f28e14857b8344d7320769c87183cd17ac
1 /*
2 * S5P/EXYNOS4 SoC series camera host interface media device driver
3 *
4 * Copyright (C) 2011 - 2013 Samsung Electronics Co., Ltd.
5 * Author: 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/clk.h>
15 #include <linux/clk-provider.h>
16 #include <linux/device.h>
17 #include <linux/errno.h>
18 #include <linux/i2c.h>
19 #include <linux/kernel.h>
20 #include <linux/list.h>
21 #include <linux/module.h>
22 #include <linux/of.h>
23 #include <linux/of_platform.h>
24 #include <linux/of_device.h>
25 #include <linux/of_graph.h>
26 #include <linux/platform_device.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/types.h>
29 #include <linux/slab.h>
30 #include <media/v4l2-async.h>
31 #include <media/v4l2-ctrls.h>
32 #include <media/v4l2-of.h>
33 #include <media/media-device.h>
34 #include <media/drv-intf/exynos-fimc.h>
35
36 #include "media-dev.h"
37 #include "fimc-core.h"
38 #include "fimc-is.h"
39 #include "fimc-lite.h"
40 #include "mipi-csis.h"
41
42 /* Set up image sensor subdev -> FIMC capture node notifications. */
43 static void __setup_sensor_notification(struct fimc_md *fmd,
44 struct v4l2_subdev *sensor,
45 struct v4l2_subdev *fimc_sd)
46 {
47 struct fimc_source_info *src_inf;
48 struct fimc_sensor_info *md_si;
49 unsigned long flags;
50
51 src_inf = v4l2_get_subdev_hostdata(sensor);
52 if (!src_inf || WARN_ON(fmd == NULL))
53 return;
54
55 md_si = source_to_sensor_info(src_inf);
56 spin_lock_irqsave(&fmd->slock, flags);
57 md_si->host = v4l2_get_subdevdata(fimc_sd);
58 spin_unlock_irqrestore(&fmd->slock, flags);
59 }
60
61 /**
62 * fimc_pipeline_prepare - update pipeline information with subdevice pointers
63 * @me: media entity terminating the pipeline
64 *
65 * Caller holds the graph mutex.
66 */
67 static void fimc_pipeline_prepare(struct fimc_pipeline *p,
68 struct media_entity *me)
69 {
70 struct fimc_md *fmd = entity_to_fimc_mdev(me);
71 struct v4l2_subdev *sd;
72 struct v4l2_subdev *sensor = NULL;
73 int i;
74
75 for (i = 0; i < IDX_MAX; i++)
76 p->subdevs[i] = NULL;
77
78 while (1) {
79 struct media_pad *pad = NULL;
80
81 /* Find remote source pad */
82 for (i = 0; i < me->num_pads; i++) {
83 struct media_pad *spad = &me->pads[i];
84 if (!(spad->flags & MEDIA_PAD_FL_SINK))
85 continue;
86 pad = media_entity_remote_pad(spad);
87 if (pad)
88 break;
89 }
90
91 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
92 break;
93 sd = media_entity_to_v4l2_subdev(pad->entity);
94
95 switch (sd->grp_id) {
96 case GRP_ID_SENSOR:
97 sensor = sd;
98 /* fall through */
99 case GRP_ID_FIMC_IS_SENSOR:
100 p->subdevs[IDX_SENSOR] = sd;
101 break;
102 case GRP_ID_CSIS:
103 p->subdevs[IDX_CSIS] = sd;
104 break;
105 case GRP_ID_FLITE:
106 p->subdevs[IDX_FLITE] = sd;
107 break;
108 case GRP_ID_FIMC:
109 p->subdevs[IDX_FIMC] = sd;
110 break;
111 case GRP_ID_FIMC_IS:
112 p->subdevs[IDX_IS_ISP] = sd;
113 break;
114 default:
115 break;
116 }
117 me = &sd->entity;
118 if (me->num_pads == 1)
119 break;
120 }
121
122 if (sensor && p->subdevs[IDX_FIMC])
123 __setup_sensor_notification(fmd, sensor, p->subdevs[IDX_FIMC]);
124 }
125
126 /**
127 * __subdev_set_power - change power state of a single subdev
128 * @sd: subdevice to change power state for
129 * @on: 1 to enable power or 0 to disable
130 *
131 * Return result of s_power subdev operation or -ENXIO if sd argument
132 * is NULL. Return 0 if the subdevice does not implement s_power.
133 */
134 static int __subdev_set_power(struct v4l2_subdev *sd, int on)
135 {
136 int *use_count;
137 int ret;
138
139 if (sd == NULL)
140 return -ENXIO;
141
142 use_count = &sd->entity.use_count;
143 if (on && (*use_count)++ > 0)
144 return 0;
145 else if (!on && (*use_count == 0 || --(*use_count) > 0))
146 return 0;
147 ret = v4l2_subdev_call(sd, core, s_power, on);
148
149 return ret != -ENOIOCTLCMD ? ret : 0;
150 }
151
152 /**
153 * fimc_pipeline_s_power - change power state of all pipeline subdevs
154 * @fimc: fimc device terminating the pipeline
155 * @state: true to power on, false to power off
156 *
157 * Needs to be called with the graph mutex held.
158 */
159 static int fimc_pipeline_s_power(struct fimc_pipeline *p, bool on)
160 {
161 static const u8 seq[2][IDX_MAX - 1] = {
162 { IDX_IS_ISP, IDX_SENSOR, IDX_CSIS, IDX_FLITE },
163 { IDX_CSIS, IDX_FLITE, IDX_SENSOR, IDX_IS_ISP },
164 };
165 int i, ret = 0;
166
167 if (p->subdevs[IDX_SENSOR] == NULL)
168 return -ENXIO;
169
170 for (i = 0; i < IDX_MAX - 1; i++) {
171 unsigned int idx = seq[on][i];
172
173 ret = __subdev_set_power(p->subdevs[idx], on);
174
175
176 if (ret < 0 && ret != -ENXIO)
177 goto error;
178 }
179 return 0;
180 error:
181 for (; i >= 0; i--) {
182 unsigned int idx = seq[on][i];
183 __subdev_set_power(p->subdevs[idx], !on);
184 }
185 return ret;
186 }
187
188 /**
189 * __fimc_pipeline_enable - enable power of all pipeline subdevs
190 * and the sensor clock
191 * @ep: video pipeline structure
192 * @fmd: fimc media device
193 *
194 * Called with the graph mutex held.
195 */
196 static int __fimc_pipeline_enable(struct exynos_media_pipeline *ep,
197 struct fimc_md *fmd)
198 {
199 struct fimc_pipeline *p = to_fimc_pipeline(ep);
200 int ret;
201
202 /* Enable PXLASYNC clock if this pipeline includes FIMC-IS */
203 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP]) {
204 ret = clk_prepare_enable(fmd->wbclk[CLK_IDX_WB_B]);
205 if (ret < 0)
206 return ret;
207 }
208
209 ret = fimc_pipeline_s_power(p, 1);
210 if (!ret)
211 return 0;
212
213 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
214 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
215
216 return ret;
217 }
218
219 /**
220 * __fimc_pipeline_open - update the pipeline information, enable power
221 * of all pipeline subdevs and the sensor clock
222 * @me: media entity to start graph walk with
223 * @prepare: true to walk the current pipeline and acquire all subdevs
224 *
225 * Called with the graph mutex held.
226 */
227 static int __fimc_pipeline_open(struct exynos_media_pipeline *ep,
228 struct media_entity *me, bool prepare)
229 {
230 struct fimc_md *fmd = entity_to_fimc_mdev(me);
231 struct fimc_pipeline *p = to_fimc_pipeline(ep);
232 struct v4l2_subdev *sd;
233
234 if (WARN_ON(p == NULL || me == NULL))
235 return -EINVAL;
236
237 if (prepare)
238 fimc_pipeline_prepare(p, me);
239
240 sd = p->subdevs[IDX_SENSOR];
241 if (sd == NULL) {
242 pr_warn("%s(): No sensor subdev\n", __func__);
243 /*
244 * Pipeline open cannot fail so as to make it possible
245 * for the user space to configure the pipeline.
246 */
247 return 0;
248 }
249
250 return __fimc_pipeline_enable(ep, fmd);
251 }
252
253 /**
254 * __fimc_pipeline_close - disable the sensor clock and pipeline power
255 * @fimc: fimc device terminating the pipeline
256 *
257 * Disable power of all subdevs and turn the external sensor clock off.
258 */
259 static int __fimc_pipeline_close(struct exynos_media_pipeline *ep)
260 {
261 struct fimc_pipeline *p = to_fimc_pipeline(ep);
262 struct v4l2_subdev *sd = p ? p->subdevs[IDX_SENSOR] : NULL;
263 struct fimc_md *fmd;
264 int ret;
265
266 if (sd == NULL) {
267 pr_warn("%s(): No sensor subdev\n", __func__);
268 return 0;
269 }
270
271 ret = fimc_pipeline_s_power(p, 0);
272
273 fmd = entity_to_fimc_mdev(&sd->entity);
274
275 /* Disable PXLASYNC clock if this pipeline includes FIMC-IS */
276 if (!IS_ERR(fmd->wbclk[CLK_IDX_WB_B]) && p->subdevs[IDX_IS_ISP])
277 clk_disable_unprepare(fmd->wbclk[CLK_IDX_WB_B]);
278
279 return ret == -ENXIO ? 0 : ret;
280 }
281
282 /**
283 * __fimc_pipeline_s_stream - call s_stream() on pipeline subdevs
284 * @pipeline: video pipeline structure
285 * @on: passed as the s_stream() callback argument
286 */
287 static int __fimc_pipeline_s_stream(struct exynos_media_pipeline *ep, bool on)
288 {
289 static const u8 seq[2][IDX_MAX] = {
290 { IDX_FIMC, IDX_SENSOR, IDX_IS_ISP, IDX_CSIS, IDX_FLITE },
291 { IDX_CSIS, IDX_FLITE, IDX_FIMC, IDX_SENSOR, IDX_IS_ISP },
292 };
293 struct fimc_pipeline *p = to_fimc_pipeline(ep);
294 struct fimc_md *fmd = entity_to_fimc_mdev(&p->subdevs[IDX_CSIS]->entity);
295 enum fimc_subdev_index sd_id;
296 int i, ret = 0;
297
298 if (p->subdevs[IDX_SENSOR] == NULL) {
299 if (!fmd->user_subdev_api) {
300 /*
301 * Sensor must be already discovered if we
302 * aren't in the user_subdev_api mode
303 */
304 return -ENODEV;
305 }
306
307 /* Get pipeline sink entity */
308 if (p->subdevs[IDX_FIMC])
309 sd_id = IDX_FIMC;
310 else if (p->subdevs[IDX_IS_ISP])
311 sd_id = IDX_IS_ISP;
312 else if (p->subdevs[IDX_FLITE])
313 sd_id = IDX_FLITE;
314 else
315 return -ENODEV;
316
317 /*
318 * Sensor could have been linked between open and STREAMON -
319 * check if this is the case.
320 */
321 fimc_pipeline_prepare(p, &p->subdevs[sd_id]->entity);
322
323 if (p->subdevs[IDX_SENSOR] == NULL)
324 return -ENODEV;
325
326 ret = __fimc_pipeline_enable(ep, fmd);
327 if (ret < 0)
328 return ret;
329
330 }
331
332 for (i = 0; i < IDX_MAX; i++) {
333 unsigned int idx = seq[on][i];
334
335 ret = v4l2_subdev_call(p->subdevs[idx], video, s_stream, on);
336
337 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV)
338 goto error;
339 }
340
341 return 0;
342 error:
343 fimc_pipeline_s_power(p, !on);
344 for (; i >= 0; i--) {
345 unsigned int idx = seq[on][i];
346 v4l2_subdev_call(p->subdevs[idx], video, s_stream, !on);
347 }
348 return ret;
349 }
350
351 /* Media pipeline operations for the FIMC/FIMC-LITE video device driver */
352 static const struct exynos_media_pipeline_ops fimc_pipeline_ops = {
353 .open = __fimc_pipeline_open,
354 .close = __fimc_pipeline_close,
355 .set_stream = __fimc_pipeline_s_stream,
356 };
357
358 static struct exynos_media_pipeline *fimc_md_pipeline_create(
359 struct fimc_md *fmd)
360 {
361 struct fimc_pipeline *p;
362
363 p = kzalloc(sizeof(*p), GFP_KERNEL);
364 if (!p)
365 return NULL;
366
367 list_add_tail(&p->list, &fmd->pipelines);
368
369 p->ep.ops = &fimc_pipeline_ops;
370 return &p->ep;
371 }
372
373 static void fimc_md_pipelines_free(struct fimc_md *fmd)
374 {
375 while (!list_empty(&fmd->pipelines)) {
376 struct fimc_pipeline *p;
377
378 p = list_entry(fmd->pipelines.next, typeof(*p), list);
379 list_del(&p->list);
380 kfree(p);
381 }
382 }
383
384 /* Parse port node and register as a sub-device any sensor specified there. */
385 static int fimc_md_parse_port_node(struct fimc_md *fmd,
386 struct device_node *port,
387 unsigned int index)
388 {
389 struct fimc_source_info *pd = &fmd->sensor[index].pdata;
390 struct device_node *rem, *ep, *np;
391 struct v4l2_of_endpoint endpoint;
392 int ret;
393
394 /* Assume here a port node can have only one endpoint node. */
395 ep = of_get_next_child(port, NULL);
396 if (!ep)
397 return 0;
398
399 ret = v4l2_of_parse_endpoint(ep, &endpoint);
400 if (ret) {
401 of_node_put(ep);
402 return ret;
403 }
404
405 if (WARN_ON(endpoint.base.port == 0) || index >= FIMC_MAX_SENSORS)
406 return -EINVAL;
407
408 pd->mux_id = (endpoint.base.port - 1) & 0x1;
409
410 rem = of_graph_get_remote_port_parent(ep);
411 of_node_put(ep);
412 if (rem == NULL) {
413 v4l2_info(&fmd->v4l2_dev, "Remote device at %s not found\n",
414 ep->full_name);
415 return 0;
416 }
417
418 if (fimc_input_is_parallel(endpoint.base.port)) {
419 if (endpoint.bus_type == V4L2_MBUS_PARALLEL)
420 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_601;
421 else
422 pd->sensor_bus_type = FIMC_BUS_TYPE_ITU_656;
423 pd->flags = endpoint.bus.parallel.flags;
424 } else if (fimc_input_is_mipi_csi(endpoint.base.port)) {
425 /*
426 * MIPI CSI-2: only input mux selection and
427 * the sensor's clock frequency is needed.
428 */
429 pd->sensor_bus_type = FIMC_BUS_TYPE_MIPI_CSI2;
430 } else {
431 v4l2_err(&fmd->v4l2_dev, "Wrong port id (%u) at node %s\n",
432 endpoint.base.port, rem->full_name);
433 }
434 /*
435 * For FIMC-IS handled sensors, that are placed under i2c-isp device
436 * node, FIMC is connected to the FIMC-IS through its ISP Writeback
437 * input. Sensors are attached to the FIMC-LITE hostdata interface
438 * directly or through MIPI-CSIS, depending on the external media bus
439 * used. This needs to be handled in a more reliable way, not by just
440 * checking parent's node name.
441 */
442 np = of_get_parent(rem);
443
444 if (np && !of_node_cmp(np->name, "i2c-isp"))
445 pd->fimc_bus_type = FIMC_BUS_TYPE_ISP_WRITEBACK;
446 else
447 pd->fimc_bus_type = pd->sensor_bus_type;
448
449 if (WARN_ON(index >= ARRAY_SIZE(fmd->sensor)))
450 return -EINVAL;
451
452 fmd->sensor[index].asd.match_type = V4L2_ASYNC_MATCH_OF;
453 fmd->sensor[index].asd.match.of.node = rem;
454 fmd->async_subdevs[index] = &fmd->sensor[index].asd;
455
456 fmd->num_sensors++;
457
458 of_node_put(rem);
459 return 0;
460 }
461
462 /* Register all SoC external sub-devices */
463 static int fimc_md_register_sensor_entities(struct fimc_md *fmd)
464 {
465 struct device_node *parent = fmd->pdev->dev.of_node;
466 struct device_node *node, *ports;
467 int index = 0;
468 int ret;
469
470 /*
471 * Runtime resume one of the FIMC entities to make sure
472 * the sclk_cam clocks are not globally disabled.
473 */
474 if (!fmd->pmf)
475 return -ENXIO;
476
477 ret = pm_runtime_get_sync(fmd->pmf);
478 if (ret < 0)
479 return ret;
480
481 fmd->num_sensors = 0;
482
483 /* Attach sensors linked to MIPI CSI-2 receivers */
484 for_each_available_child_of_node(parent, node) {
485 struct device_node *port;
486
487 if (of_node_cmp(node->name, "csis"))
488 continue;
489 /* The csis node can have only port subnode. */
490 port = of_get_next_child(node, NULL);
491 if (!port)
492 continue;
493
494 ret = fimc_md_parse_port_node(fmd, port, index);
495 if (ret < 0) {
496 of_node_put(node);
497 goto rpm_put;
498 }
499 index++;
500 }
501
502 /* Attach sensors listed in the parallel-ports node */
503 ports = of_get_child_by_name(parent, "parallel-ports");
504 if (!ports)
505 goto rpm_put;
506
507 for_each_child_of_node(ports, node) {
508 ret = fimc_md_parse_port_node(fmd, node, index);
509 if (ret < 0) {
510 of_node_put(node);
511 break;
512 }
513 index++;
514 }
515 rpm_put:
516 pm_runtime_put(fmd->pmf);
517 return ret;
518 }
519
520 static int __of_get_csis_id(struct device_node *np)
521 {
522 u32 reg = 0;
523
524 np = of_get_child_by_name(np, "port");
525 if (!np)
526 return -EINVAL;
527 of_property_read_u32(np, "reg", &reg);
528 return reg - FIMC_INPUT_MIPI_CSI2_0;
529 }
530
531 /*
532 * MIPI-CSIS, FIMC and FIMC-LITE platform devices registration.
533 */
534 static int register_fimc_lite_entity(struct fimc_md *fmd,
535 struct fimc_lite *fimc_lite)
536 {
537 struct v4l2_subdev *sd;
538 struct exynos_media_pipeline *ep;
539 int ret;
540
541 if (WARN_ON(fimc_lite->index >= FIMC_LITE_MAX_DEVS ||
542 fmd->fimc_lite[fimc_lite->index]))
543 return -EBUSY;
544
545 sd = &fimc_lite->subdev;
546 sd->grp_id = GRP_ID_FLITE;
547
548 ep = fimc_md_pipeline_create(fmd);
549 if (!ep)
550 return -ENOMEM;
551
552 v4l2_set_subdev_hostdata(sd, ep);
553
554 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
555 if (!ret)
556 fmd->fimc_lite[fimc_lite->index] = fimc_lite;
557 else
558 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.LITE%d\n",
559 fimc_lite->index);
560 return ret;
561 }
562
563 static int register_fimc_entity(struct fimc_md *fmd, struct fimc_dev *fimc)
564 {
565 struct v4l2_subdev *sd;
566 struct exynos_media_pipeline *ep;
567 int ret;
568
569 if (WARN_ON(fimc->id >= FIMC_MAX_DEVS || fmd->fimc[fimc->id]))
570 return -EBUSY;
571
572 sd = &fimc->vid_cap.subdev;
573 sd->grp_id = GRP_ID_FIMC;
574
575 ep = fimc_md_pipeline_create(fmd);
576 if (!ep)
577 return -ENOMEM;
578
579 v4l2_set_subdev_hostdata(sd, ep);
580
581 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
582 if (!ret) {
583 if (!fmd->pmf && fimc->pdev)
584 fmd->pmf = &fimc->pdev->dev;
585 fmd->fimc[fimc->id] = fimc;
586 fimc->vid_cap.user_subdev_api = fmd->user_subdev_api;
587 } else {
588 v4l2_err(&fmd->v4l2_dev, "Failed to register FIMC.%d (%d)\n",
589 fimc->id, ret);
590 }
591 return ret;
592 }
593
594 static int register_csis_entity(struct fimc_md *fmd,
595 struct platform_device *pdev,
596 struct v4l2_subdev *sd)
597 {
598 struct device_node *node = pdev->dev.of_node;
599 int id, ret;
600
601 id = node ? __of_get_csis_id(node) : max(0, pdev->id);
602
603 if (WARN_ON(id < 0 || id >= CSIS_MAX_ENTITIES))
604 return -ENOENT;
605
606 if (WARN_ON(fmd->csis[id].sd))
607 return -EBUSY;
608
609 sd->grp_id = GRP_ID_CSIS;
610 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
611 if (!ret)
612 fmd->csis[id].sd = sd;
613 else
614 v4l2_err(&fmd->v4l2_dev,
615 "Failed to register MIPI-CSIS.%d (%d)\n", id, ret);
616 return ret;
617 }
618
619 static int register_fimc_is_entity(struct fimc_md *fmd, struct fimc_is *is)
620 {
621 struct v4l2_subdev *sd = &is->isp.subdev;
622 struct exynos_media_pipeline *ep;
623 int ret;
624
625 /* Allocate pipeline object for the ISP capture video node. */
626 ep = fimc_md_pipeline_create(fmd);
627 if (!ep)
628 return -ENOMEM;
629
630 v4l2_set_subdev_hostdata(sd, ep);
631
632 ret = v4l2_device_register_subdev(&fmd->v4l2_dev, sd);
633 if (ret) {
634 v4l2_err(&fmd->v4l2_dev,
635 "Failed to register FIMC-ISP (%d)\n", ret);
636 return ret;
637 }
638
639 fmd->fimc_is = is;
640 return 0;
641 }
642
643 static int fimc_md_register_platform_entity(struct fimc_md *fmd,
644 struct platform_device *pdev,
645 int plat_entity)
646 {
647 struct device *dev = &pdev->dev;
648 int ret = -EPROBE_DEFER;
649 void *drvdata;
650
651 /* Lock to ensure dev->driver won't change. */
652 device_lock(dev);
653
654 if (!dev->driver || !try_module_get(dev->driver->owner))
655 goto dev_unlock;
656
657 drvdata = dev_get_drvdata(dev);
658 /* Some subdev didn't probe successfully id drvdata is NULL */
659 if (drvdata) {
660 switch (plat_entity) {
661 case IDX_FIMC:
662 ret = register_fimc_entity(fmd, drvdata);
663 break;
664 case IDX_FLITE:
665 ret = register_fimc_lite_entity(fmd, drvdata);
666 break;
667 case IDX_CSIS:
668 ret = register_csis_entity(fmd, pdev, drvdata);
669 break;
670 case IDX_IS_ISP:
671 ret = register_fimc_is_entity(fmd, drvdata);
672 break;
673 default:
674 ret = -ENODEV;
675 }
676 }
677
678 module_put(dev->driver->owner);
679 dev_unlock:
680 device_unlock(dev);
681 if (ret == -EPROBE_DEFER)
682 dev_info(&fmd->pdev->dev, "deferring %s device registration\n",
683 dev_name(dev));
684 else if (ret < 0)
685 dev_err(&fmd->pdev->dev, "%s device registration failed (%d)\n",
686 dev_name(dev), ret);
687 return ret;
688 }
689
690 /* Register FIMC, FIMC-LITE and CSIS media entities */
691 static int fimc_md_register_platform_entities(struct fimc_md *fmd,
692 struct device_node *parent)
693 {
694 struct device_node *node;
695 int ret = 0;
696
697 for_each_available_child_of_node(parent, node) {
698 struct platform_device *pdev;
699 int plat_entity = -1;
700
701 pdev = of_find_device_by_node(node);
702 if (!pdev)
703 continue;
704
705 /* If driver of any entity isn't ready try all again later. */
706 if (!strcmp(node->name, CSIS_OF_NODE_NAME))
707 plat_entity = IDX_CSIS;
708 else if (!strcmp(node->name, FIMC_IS_OF_NODE_NAME))
709 plat_entity = IDX_IS_ISP;
710 else if (!strcmp(node->name, FIMC_LITE_OF_NODE_NAME))
711 plat_entity = IDX_FLITE;
712 else if (!strcmp(node->name, FIMC_OF_NODE_NAME) &&
713 !of_property_read_bool(node, "samsung,lcd-wb"))
714 plat_entity = IDX_FIMC;
715
716 if (plat_entity >= 0)
717 ret = fimc_md_register_platform_entity(fmd, pdev,
718 plat_entity);
719 put_device(&pdev->dev);
720 if (ret < 0) {
721 of_node_put(node);
722 break;
723 }
724 }
725
726 return ret;
727 }
728
729 static void fimc_md_unregister_entities(struct fimc_md *fmd)
730 {
731 int i;
732
733 for (i = 0; i < FIMC_MAX_DEVS; i++) {
734 struct fimc_dev *dev = fmd->fimc[i];
735 if (dev == NULL)
736 continue;
737 v4l2_device_unregister_subdev(&dev->vid_cap.subdev);
738 dev->vid_cap.ve.pipe = NULL;
739 fmd->fimc[i] = NULL;
740 }
741 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
742 struct fimc_lite *dev = fmd->fimc_lite[i];
743 if (dev == NULL)
744 continue;
745 v4l2_device_unregister_subdev(&dev->subdev);
746 dev->ve.pipe = NULL;
747 fmd->fimc_lite[i] = NULL;
748 }
749 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
750 if (fmd->csis[i].sd == NULL)
751 continue;
752 v4l2_device_unregister_subdev(fmd->csis[i].sd);
753 fmd->csis[i].sd = NULL;
754 }
755
756 if (fmd->fimc_is)
757 v4l2_device_unregister_subdev(&fmd->fimc_is->isp.subdev);
758
759 v4l2_info(&fmd->v4l2_dev, "Unregistered all entities\n");
760 }
761
762 /**
763 * __fimc_md_create_fimc_links - create links to all FIMC entities
764 * @fmd: fimc media device
765 * @source: the source entity to create links to all fimc entities from
766 * @sensor: sensor subdev linked to FIMC[fimc_id] entity, may be null
767 * @pad: the source entity pad index
768 * @link_mask: bitmask of the fimc devices for which link should be enabled
769 */
770 static int __fimc_md_create_fimc_sink_links(struct fimc_md *fmd,
771 struct media_entity *source,
772 struct v4l2_subdev *sensor,
773 int pad, int link_mask)
774 {
775 struct fimc_source_info *si = NULL;
776 struct media_entity *sink;
777 unsigned int flags = 0;
778 int i, ret = 0;
779
780 if (sensor) {
781 si = v4l2_get_subdev_hostdata(sensor);
782 /* Skip direct FIMC links in the logical FIMC-IS sensor path */
783 if (si && si->fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
784 ret = 1;
785 }
786
787 for (i = 0; !ret && i < FIMC_MAX_DEVS; i++) {
788 if (!fmd->fimc[i])
789 continue;
790 /*
791 * Some FIMC variants are not fitted with camera capture
792 * interface. Skip creating a link from sensor for those.
793 */
794 if (!fmd->fimc[i]->variant->has_cam_if)
795 continue;
796
797 flags = ((1 << i) & link_mask) ? MEDIA_LNK_FL_ENABLED : 0;
798
799 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
800 ret = media_create_pad_link(source, pad, sink,
801 FIMC_SD_PAD_SINK_CAM, flags);
802 if (ret)
803 return ret;
804
805 /* Notify FIMC capture subdev entity */
806 ret = media_entity_call(sink, link_setup, &sink->pads[0],
807 &source->pads[pad], flags);
808 if (ret)
809 break;
810
811 v4l2_info(&fmd->v4l2_dev, "created link [%s] %c> [%s]\n",
812 source->name, flags ? '=' : '-', sink->name);
813 }
814
815 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
816 if (!fmd->fimc_lite[i])
817 continue;
818
819 sink = &fmd->fimc_lite[i]->subdev.entity;
820 ret = media_create_pad_link(source, pad, sink,
821 FLITE_SD_PAD_SINK, 0);
822 if (ret)
823 return ret;
824
825 /* Notify FIMC-LITE subdev entity */
826 ret = media_entity_call(sink, link_setup, &sink->pads[0],
827 &source->pads[pad], 0);
828 if (ret)
829 break;
830
831 v4l2_info(&fmd->v4l2_dev, "created link [%s] -> [%s]\n",
832 source->name, sink->name);
833 }
834 return 0;
835 }
836
837 /* Create links from FIMC-LITE source pads to other entities */
838 static int __fimc_md_create_flite_source_links(struct fimc_md *fmd)
839 {
840 struct media_entity *source, *sink;
841 int i, ret = 0;
842
843 for (i = 0; i < FIMC_LITE_MAX_DEVS; i++) {
844 struct fimc_lite *fimc = fmd->fimc_lite[i];
845
846 if (fimc == NULL)
847 continue;
848
849 source = &fimc->subdev.entity;
850 sink = &fimc->ve.vdev.entity;
851 /* FIMC-LITE's subdev and video node */
852 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_DMA,
853 sink, 0, 0);
854 if (ret)
855 break;
856 /* Link from FIMC-LITE to IS-ISP subdev */
857 sink = &fmd->fimc_is->isp.subdev.entity;
858 ret = media_create_pad_link(source, FLITE_SD_PAD_SOURCE_ISP,
859 sink, 0, 0);
860 if (ret)
861 break;
862 }
863
864 return ret;
865 }
866
867 /* Create FIMC-IS links */
868 static int __fimc_md_create_fimc_is_links(struct fimc_md *fmd)
869 {
870 struct fimc_isp *isp = &fmd->fimc_is->isp;
871 struct media_entity *source, *sink;
872 int i, ret;
873
874 source = &isp->subdev.entity;
875
876 for (i = 0; i < FIMC_MAX_DEVS; i++) {
877 if (fmd->fimc[i] == NULL)
878 continue;
879
880 /* Link from FIMC-IS-ISP subdev to FIMC */
881 sink = &fmd->fimc[i]->vid_cap.subdev.entity;
882 ret = media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_FIFO,
883 sink, FIMC_SD_PAD_SINK_FIFO, 0);
884 if (ret)
885 return ret;
886 }
887
888 /* Link from FIMC-IS-ISP subdev to fimc-is-isp.capture video node */
889 sink = &isp->video_capture.ve.vdev.entity;
890
891 /* Skip this link if the fimc-is-isp video node driver isn't built-in */
892 if (sink->num_pads == 0)
893 return 0;
894
895 return media_create_pad_link(source, FIMC_ISP_SD_PAD_SRC_DMA,
896 sink, 0, 0);
897 }
898
899 /**
900 * fimc_md_create_links - create default links between registered entities
901 *
902 * Parallel interface sensor entities are connected directly to FIMC capture
903 * entities. The sensors using MIPI CSIS bus are connected through immutable
904 * link with CSI receiver entity specified by mux_id. Any registered CSIS
905 * entity has a link to each registered FIMC capture entity. Enabled links
906 * are created by default between each subsequent registered sensor and
907 * subsequent FIMC capture entity. The number of default active links is
908 * determined by the number of available sensors or FIMC entities,
909 * whichever is less.
910 */
911 static int fimc_md_create_links(struct fimc_md *fmd)
912 {
913 struct v4l2_subdev *csi_sensors[CSIS_MAX_ENTITIES] = { NULL };
914 struct v4l2_subdev *sensor, *csis;
915 struct fimc_source_info *pdata;
916 struct media_entity *source, *sink;
917 int i, pad, fimc_id = 0, ret = 0;
918 u32 flags, link_mask = 0;
919
920 for (i = 0; i < fmd->num_sensors; i++) {
921 if (fmd->sensor[i].subdev == NULL)
922 continue;
923
924 sensor = fmd->sensor[i].subdev;
925 pdata = v4l2_get_subdev_hostdata(sensor);
926 if (!pdata)
927 continue;
928
929 source = NULL;
930
931 switch (pdata->sensor_bus_type) {
932 case FIMC_BUS_TYPE_MIPI_CSI2:
933 if (WARN(pdata->mux_id >= CSIS_MAX_ENTITIES,
934 "Wrong CSI channel id: %d\n", pdata->mux_id))
935 return -EINVAL;
936
937 csis = fmd->csis[pdata->mux_id].sd;
938 if (WARN(csis == NULL,
939 "MIPI-CSI interface specified "
940 "but s5p-csis module is not loaded!\n"))
941 return -EINVAL;
942
943 pad = sensor->entity.num_pads - 1;
944 ret = media_create_pad_link(&sensor->entity, pad,
945 &csis->entity, CSIS_PAD_SINK,
946 MEDIA_LNK_FL_IMMUTABLE |
947 MEDIA_LNK_FL_ENABLED);
948 if (ret)
949 return ret;
950
951 v4l2_info(&fmd->v4l2_dev, "created link [%s] => [%s]\n",
952 sensor->entity.name, csis->entity.name);
953
954 source = NULL;
955 csi_sensors[pdata->mux_id] = sensor;
956 break;
957
958 case FIMC_BUS_TYPE_ITU_601...FIMC_BUS_TYPE_ITU_656:
959 source = &sensor->entity;
960 pad = 0;
961 break;
962
963 default:
964 v4l2_err(&fmd->v4l2_dev, "Wrong bus_type: %x\n",
965 pdata->sensor_bus_type);
966 return -EINVAL;
967 }
968 if (source == NULL)
969 continue;
970
971 link_mask = 1 << fimc_id++;
972 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
973 pad, link_mask);
974 }
975
976 for (i = 0; i < CSIS_MAX_ENTITIES; i++) {
977 if (fmd->csis[i].sd == NULL)
978 continue;
979
980 source = &fmd->csis[i].sd->entity;
981 pad = CSIS_PAD_SOURCE;
982 sensor = csi_sensors[i];
983
984 link_mask = 1 << fimc_id++;
985 ret = __fimc_md_create_fimc_sink_links(fmd, source, sensor,
986 pad, link_mask);
987 }
988
989 /* Create immutable links between each FIMC's subdev and video node */
990 flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED;
991 for (i = 0; i < FIMC_MAX_DEVS; i++) {
992 if (!fmd->fimc[i])
993 continue;
994
995 source = &fmd->fimc[i]->vid_cap.subdev.entity;
996 sink = &fmd->fimc[i]->vid_cap.ve.vdev.entity;
997
998 ret = media_create_pad_link(source, FIMC_SD_PAD_SOURCE,
999 sink, 0, flags);
1000 if (ret)
1001 break;
1002 }
1003
1004 ret = __fimc_md_create_flite_source_links(fmd);
1005 if (ret < 0)
1006 return ret;
1007
1008 if (fmd->use_isp)
1009 ret = __fimc_md_create_fimc_is_links(fmd);
1010
1011 return ret;
1012 }
1013
1014 /*
1015 * The peripheral sensor and CAM_BLK (PIXELASYNCMx) clocks management.
1016 */
1017 static void fimc_md_put_clocks(struct fimc_md *fmd)
1018 {
1019 int i = FIMC_MAX_CAMCLKS;
1020
1021 while (--i >= 0) {
1022 if (IS_ERR(fmd->camclk[i].clock))
1023 continue;
1024 clk_put(fmd->camclk[i].clock);
1025 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1026 }
1027
1028 /* Writeback (PIXELASYNCMx) clocks */
1029 for (i = 0; i < FIMC_MAX_WBCLKS; i++) {
1030 if (IS_ERR(fmd->wbclk[i]))
1031 continue;
1032 clk_put(fmd->wbclk[i]);
1033 fmd->wbclk[i] = ERR_PTR(-EINVAL);
1034 }
1035 }
1036
1037 static int fimc_md_get_clocks(struct fimc_md *fmd)
1038 {
1039 struct device *dev = &fmd->pdev->dev;
1040 char clk_name[32];
1041 struct clk *clock;
1042 int i, ret = 0;
1043
1044 for (i = 0; i < FIMC_MAX_CAMCLKS; i++)
1045 fmd->camclk[i].clock = ERR_PTR(-EINVAL);
1046
1047 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1048 snprintf(clk_name, sizeof(clk_name), "sclk_cam%u", i);
1049 clock = clk_get(dev, clk_name);
1050
1051 if (IS_ERR(clock)) {
1052 dev_err(dev, "Failed to get clock: %s\n", clk_name);
1053 ret = PTR_ERR(clock);
1054 break;
1055 }
1056 fmd->camclk[i].clock = clock;
1057 }
1058 if (ret)
1059 fimc_md_put_clocks(fmd);
1060
1061 if (!fmd->use_isp)
1062 return 0;
1063 /*
1064 * For now get only PIXELASYNCM1 clock (Writeback B/ISP),
1065 * leave PIXELASYNCM0 out for the LCD Writeback driver.
1066 */
1067 fmd->wbclk[CLK_IDX_WB_A] = ERR_PTR(-EINVAL);
1068
1069 for (i = CLK_IDX_WB_B; i < FIMC_MAX_WBCLKS; i++) {
1070 snprintf(clk_name, sizeof(clk_name), "pxl_async%u", i);
1071 clock = clk_get(dev, clk_name);
1072 if (IS_ERR(clock)) {
1073 v4l2_err(&fmd->v4l2_dev, "Failed to get clock: %s\n",
1074 clk_name);
1075 ret = PTR_ERR(clock);
1076 break;
1077 }
1078 fmd->wbclk[i] = clock;
1079 }
1080 if (ret)
1081 fimc_md_put_clocks(fmd);
1082
1083 return ret;
1084 }
1085
1086 static int __fimc_md_modify_pipeline(struct media_entity *entity, bool enable)
1087 {
1088 struct exynos_video_entity *ve;
1089 struct fimc_pipeline *p;
1090 struct video_device *vdev;
1091 int ret;
1092
1093 vdev = media_entity_to_video_device(entity);
1094 if (vdev->entity.use_count == 0)
1095 return 0;
1096
1097 ve = vdev_to_exynos_video_entity(vdev);
1098 p = to_fimc_pipeline(ve->pipe);
1099 /*
1100 * Nothing to do if we are disabling the pipeline, some link
1101 * has been disconnected and p->subdevs array is cleared now.
1102 */
1103 if (!enable && p->subdevs[IDX_SENSOR] == NULL)
1104 return 0;
1105
1106 if (enable)
1107 ret = __fimc_pipeline_open(ve->pipe, entity, true);
1108 else
1109 ret = __fimc_pipeline_close(ve->pipe);
1110
1111 if (ret == 0 && !enable)
1112 memset(p->subdevs, 0, sizeof(p->subdevs));
1113
1114 return ret;
1115 }
1116
1117 /* Locking: called with entity->graph_obj.mdev->graph_mutex mutex held. */
1118 static int __fimc_md_modify_pipelines(struct media_entity *entity, bool enable,
1119 struct media_entity_graph *graph)
1120 {
1121 struct media_entity *entity_err = entity;
1122 int ret;
1123
1124 /*
1125 * Walk current graph and call the pipeline open/close routine for each
1126 * opened video node that belongs to the graph of entities connected
1127 * through active links. This is needed as we cannot power on/off the
1128 * subdevs in random order.
1129 */
1130 media_entity_graph_walk_start(graph, entity);
1131
1132 while ((entity = media_entity_graph_walk_next(graph))) {
1133 if (!is_media_entity_v4l2_io(entity))
1134 continue;
1135
1136 ret = __fimc_md_modify_pipeline(entity, enable);
1137
1138 if (ret < 0)
1139 goto err;
1140 }
1141
1142 return 0;
1143
1144 err:
1145 media_entity_graph_walk_start(graph, entity_err);
1146
1147 while ((entity_err = media_entity_graph_walk_next(graph))) {
1148 if (!is_media_entity_v4l2_io(entity_err))
1149 continue;
1150
1151 __fimc_md_modify_pipeline(entity_err, !enable);
1152
1153 if (entity_err == entity)
1154 break;
1155 }
1156
1157 return ret;
1158 }
1159
1160 static int fimc_md_link_notify(struct media_link *link, unsigned int flags,
1161 unsigned int notification)
1162 {
1163 struct media_entity_graph *graph =
1164 &container_of(link->graph_obj.mdev, struct fimc_md,
1165 media_dev)->link_setup_graph;
1166 struct media_entity *sink = link->sink->entity;
1167 int ret = 0;
1168
1169 /* Before link disconnection */
1170 if (notification == MEDIA_DEV_NOTIFY_PRE_LINK_CH) {
1171 ret = media_entity_graph_walk_init(graph,
1172 link->graph_obj.mdev);
1173 if (ret)
1174 return ret;
1175 if (!(flags & MEDIA_LNK_FL_ENABLED))
1176 ret = __fimc_md_modify_pipelines(sink, false, graph);
1177 #if 0
1178 else
1179 /* TODO: Link state change validation */
1180 #endif
1181 /* After link activation */
1182 } else if (notification == MEDIA_DEV_NOTIFY_POST_LINK_CH) {
1183 if (link->flags & MEDIA_LNK_FL_ENABLED)
1184 ret = __fimc_md_modify_pipelines(sink, true, graph);
1185 media_entity_graph_walk_cleanup(graph);
1186 }
1187
1188 return ret ? -EPIPE : 0;
1189 }
1190
1191 static ssize_t fimc_md_sysfs_show(struct device *dev,
1192 struct device_attribute *attr, char *buf)
1193 {
1194 struct platform_device *pdev = to_platform_device(dev);
1195 struct fimc_md *fmd = platform_get_drvdata(pdev);
1196
1197 if (fmd->user_subdev_api)
1198 return strlcpy(buf, "Sub-device API (sub-dev)\n", PAGE_SIZE);
1199
1200 return strlcpy(buf, "V4L2 video node only API (vid-dev)\n", PAGE_SIZE);
1201 }
1202
1203 static ssize_t fimc_md_sysfs_store(struct device *dev,
1204 struct device_attribute *attr,
1205 const char *buf, size_t count)
1206 {
1207 struct platform_device *pdev = to_platform_device(dev);
1208 struct fimc_md *fmd = platform_get_drvdata(pdev);
1209 bool subdev_api;
1210 int i;
1211
1212 if (!strcmp(buf, "vid-dev\n"))
1213 subdev_api = false;
1214 else if (!strcmp(buf, "sub-dev\n"))
1215 subdev_api = true;
1216 else
1217 return count;
1218
1219 fmd->user_subdev_api = subdev_api;
1220 for (i = 0; i < FIMC_MAX_DEVS; i++)
1221 if (fmd->fimc[i])
1222 fmd->fimc[i]->vid_cap.user_subdev_api = subdev_api;
1223 return count;
1224 }
1225 /*
1226 * This device attribute is to select video pipeline configuration method.
1227 * There are following valid values:
1228 * vid-dev - for V4L2 video node API only, subdevice will be configured
1229 * by the host driver.
1230 * sub-dev - for media controller API, subdevs must be configured in user
1231 * space before starting streaming.
1232 */
1233 static DEVICE_ATTR(subdev_conf_mode, S_IWUSR | S_IRUGO,
1234 fimc_md_sysfs_show, fimc_md_sysfs_store);
1235
1236 static int fimc_md_get_pinctrl(struct fimc_md *fmd)
1237 {
1238 struct device *dev = &fmd->pdev->dev;
1239 struct fimc_pinctrl *pctl = &fmd->pinctl;
1240
1241 pctl->pinctrl = devm_pinctrl_get(dev);
1242 if (IS_ERR(pctl->pinctrl))
1243 return PTR_ERR(pctl->pinctrl);
1244
1245 pctl->state_default = pinctrl_lookup_state(pctl->pinctrl,
1246 PINCTRL_STATE_DEFAULT);
1247 if (IS_ERR(pctl->state_default))
1248 return PTR_ERR(pctl->state_default);
1249
1250 pctl->state_idle = pinctrl_lookup_state(pctl->pinctrl,
1251 PINCTRL_STATE_IDLE);
1252 return 0;
1253 }
1254
1255 static int cam_clk_prepare(struct clk_hw *hw)
1256 {
1257 struct cam_clk *camclk = to_cam_clk(hw);
1258 int ret;
1259
1260 if (camclk->fmd->pmf == NULL)
1261 return -ENODEV;
1262
1263 ret = pm_runtime_get_sync(camclk->fmd->pmf);
1264 return ret < 0 ? ret : 0;
1265 }
1266
1267 static void cam_clk_unprepare(struct clk_hw *hw)
1268 {
1269 struct cam_clk *camclk = to_cam_clk(hw);
1270
1271 if (camclk->fmd->pmf == NULL)
1272 return;
1273
1274 pm_runtime_put_sync(camclk->fmd->pmf);
1275 }
1276
1277 static const struct clk_ops cam_clk_ops = {
1278 .prepare = cam_clk_prepare,
1279 .unprepare = cam_clk_unprepare,
1280 };
1281
1282 static void fimc_md_unregister_clk_provider(struct fimc_md *fmd)
1283 {
1284 struct cam_clk_provider *cp = &fmd->clk_provider;
1285 unsigned int i;
1286
1287 if (cp->of_node)
1288 of_clk_del_provider(cp->of_node);
1289
1290 for (i = 0; i < cp->num_clocks; i++)
1291 clk_unregister(cp->clks[i]);
1292 }
1293
1294 static int fimc_md_register_clk_provider(struct fimc_md *fmd)
1295 {
1296 struct cam_clk_provider *cp = &fmd->clk_provider;
1297 struct device *dev = &fmd->pdev->dev;
1298 int i, ret;
1299
1300 for (i = 0; i < FIMC_MAX_CAMCLKS; i++) {
1301 struct cam_clk *camclk = &cp->camclk[i];
1302 struct clk_init_data init;
1303 const char *p_name;
1304
1305 ret = of_property_read_string_index(dev->of_node,
1306 "clock-output-names", i, &init.name);
1307 if (ret < 0)
1308 break;
1309
1310 p_name = __clk_get_name(fmd->camclk[i].clock);
1311
1312 /* It's safe since clk_register() will duplicate the string. */
1313 init.parent_names = &p_name;
1314 init.num_parents = 1;
1315 init.ops = &cam_clk_ops;
1316 init.flags = CLK_SET_RATE_PARENT;
1317 camclk->hw.init = &init;
1318 camclk->fmd = fmd;
1319
1320 cp->clks[i] = clk_register(NULL, &camclk->hw);
1321 if (IS_ERR(cp->clks[i])) {
1322 dev_err(dev, "failed to register clock: %s (%ld)\n",
1323 init.name, PTR_ERR(cp->clks[i]));
1324 ret = PTR_ERR(cp->clks[i]);
1325 goto err;
1326 }
1327 cp->num_clocks++;
1328 }
1329
1330 if (cp->num_clocks == 0) {
1331 dev_warn(dev, "clk provider not registered\n");
1332 return 0;
1333 }
1334
1335 cp->clk_data.clks = cp->clks;
1336 cp->clk_data.clk_num = cp->num_clocks;
1337 cp->of_node = dev->of_node;
1338 ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1339 &cp->clk_data);
1340 if (ret == 0)
1341 return 0;
1342 err:
1343 fimc_md_unregister_clk_provider(fmd);
1344 return ret;
1345 }
1346
1347 static int subdev_notifier_bound(struct v4l2_async_notifier *notifier,
1348 struct v4l2_subdev *subdev,
1349 struct v4l2_async_subdev *asd)
1350 {
1351 struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1352 struct fimc_sensor_info *si = NULL;
1353 int i;
1354
1355 /* Find platform data for this sensor subdev */
1356 for (i = 0; i < ARRAY_SIZE(fmd->sensor); i++)
1357 if (fmd->sensor[i].asd.match.of.node == subdev->dev->of_node)
1358 si = &fmd->sensor[i];
1359
1360 if (si == NULL)
1361 return -EINVAL;
1362
1363 v4l2_set_subdev_hostdata(subdev, &si->pdata);
1364
1365 if (si->pdata.fimc_bus_type == FIMC_BUS_TYPE_ISP_WRITEBACK)
1366 subdev->grp_id = GRP_ID_FIMC_IS_SENSOR;
1367 else
1368 subdev->grp_id = GRP_ID_SENSOR;
1369
1370 si->subdev = subdev;
1371
1372 v4l2_info(&fmd->v4l2_dev, "Registered sensor subdevice: %s (%d)\n",
1373 subdev->name, fmd->num_sensors);
1374
1375 fmd->num_sensors++;
1376
1377 return 0;
1378 }
1379
1380 static int subdev_notifier_complete(struct v4l2_async_notifier *notifier)
1381 {
1382 struct fimc_md *fmd = notifier_to_fimc_md(notifier);
1383 int ret;
1384
1385 mutex_lock(&fmd->media_dev.graph_mutex);
1386
1387 ret = fimc_md_create_links(fmd);
1388 if (ret < 0)
1389 goto unlock;
1390
1391 ret = v4l2_device_register_subdev_nodes(&fmd->v4l2_dev);
1392 unlock:
1393 mutex_unlock(&fmd->media_dev.graph_mutex);
1394 if (ret < 0)
1395 return ret;
1396
1397 return media_device_register(&fmd->media_dev);
1398 }
1399
1400 static int fimc_md_probe(struct platform_device *pdev)
1401 {
1402 struct device *dev = &pdev->dev;
1403 struct v4l2_device *v4l2_dev;
1404 struct fimc_md *fmd;
1405 int ret;
1406
1407 fmd = devm_kzalloc(dev, sizeof(*fmd), GFP_KERNEL);
1408 if (!fmd)
1409 return -ENOMEM;
1410
1411 spin_lock_init(&fmd->slock);
1412 INIT_LIST_HEAD(&fmd->pipelines);
1413 fmd->pdev = pdev;
1414
1415 strlcpy(fmd->media_dev.model, "SAMSUNG S5P FIMC",
1416 sizeof(fmd->media_dev.model));
1417 fmd->media_dev.link_notify = fimc_md_link_notify;
1418 fmd->media_dev.dev = dev;
1419
1420 v4l2_dev = &fmd->v4l2_dev;
1421 v4l2_dev->mdev = &fmd->media_dev;
1422 v4l2_dev->notify = fimc_sensor_notify;
1423 strlcpy(v4l2_dev->name, "s5p-fimc-md", sizeof(v4l2_dev->name));
1424
1425 fmd->use_isp = fimc_md_is_isp_available(dev->of_node);
1426 fmd->user_subdev_api = true;
1427
1428 media_device_init(&fmd->media_dev);
1429
1430 ret = v4l2_device_register(dev, &fmd->v4l2_dev);
1431 if (ret < 0) {
1432 v4l2_err(v4l2_dev, "Failed to register v4l2_device: %d\n", ret);
1433 return ret;
1434 }
1435
1436 ret = fimc_md_get_clocks(fmd);
1437 if (ret)
1438 goto err_md;
1439
1440 ret = fimc_md_get_pinctrl(fmd);
1441 if (ret < 0) {
1442 if (ret != EPROBE_DEFER)
1443 dev_err(dev, "Failed to get pinctrl: %d\n", ret);
1444 goto err_clk;
1445 }
1446
1447 platform_set_drvdata(pdev, fmd);
1448
1449 /* Protect the media graph while we're registering entities */
1450 mutex_lock(&fmd->media_dev.graph_mutex);
1451
1452 ret = fimc_md_register_platform_entities(fmd, dev->of_node);
1453 if (ret) {
1454 mutex_unlock(&fmd->media_dev.graph_mutex);
1455 goto err_clk;
1456 }
1457
1458 ret = fimc_md_register_sensor_entities(fmd);
1459 if (ret) {
1460 mutex_unlock(&fmd->media_dev.graph_mutex);
1461 goto err_m_ent;
1462 }
1463
1464 mutex_unlock(&fmd->media_dev.graph_mutex);
1465
1466 ret = device_create_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1467 if (ret)
1468 goto err_m_ent;
1469 /*
1470 * FIMC platform devices need to be registered before the sclk_cam
1471 * clocks provider, as one of these devices needs to be activated
1472 * to enable the clock.
1473 */
1474 ret = fimc_md_register_clk_provider(fmd);
1475 if (ret < 0) {
1476 v4l2_err(v4l2_dev, "clock provider registration failed\n");
1477 goto err_attr;
1478 }
1479
1480 if (fmd->num_sensors > 0) {
1481 fmd->subdev_notifier.subdevs = fmd->async_subdevs;
1482 fmd->subdev_notifier.num_subdevs = fmd->num_sensors;
1483 fmd->subdev_notifier.bound = subdev_notifier_bound;
1484 fmd->subdev_notifier.complete = subdev_notifier_complete;
1485 fmd->num_sensors = 0;
1486
1487 ret = v4l2_async_notifier_register(&fmd->v4l2_dev,
1488 &fmd->subdev_notifier);
1489 if (ret)
1490 goto err_clk_p;
1491 }
1492
1493 return 0;
1494
1495 err_clk_p:
1496 fimc_md_unregister_clk_provider(fmd);
1497 err_attr:
1498 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1499 err_clk:
1500 fimc_md_put_clocks(fmd);
1501 err_m_ent:
1502 fimc_md_unregister_entities(fmd);
1503 err_md:
1504 media_device_cleanup(&fmd->media_dev);
1505 v4l2_device_unregister(&fmd->v4l2_dev);
1506 return ret;
1507 }
1508
1509 static int fimc_md_remove(struct platform_device *pdev)
1510 {
1511 struct fimc_md *fmd = platform_get_drvdata(pdev);
1512
1513 if (!fmd)
1514 return 0;
1515
1516 fimc_md_unregister_clk_provider(fmd);
1517 v4l2_async_notifier_unregister(&fmd->subdev_notifier);
1518
1519 v4l2_device_unregister(&fmd->v4l2_dev);
1520 device_remove_file(&pdev->dev, &dev_attr_subdev_conf_mode);
1521 fimc_md_unregister_entities(fmd);
1522 fimc_md_pipelines_free(fmd);
1523 media_device_unregister(&fmd->media_dev);
1524 media_device_cleanup(&fmd->media_dev);
1525 fimc_md_put_clocks(fmd);
1526
1527 return 0;
1528 }
1529
1530 static const struct platform_device_id fimc_driver_ids[] __always_unused = {
1531 { .name = "s5p-fimc-md" },
1532 { },
1533 };
1534 MODULE_DEVICE_TABLE(platform, fimc_driver_ids);
1535
1536 static const struct of_device_id fimc_md_of_match[] = {
1537 { .compatible = "samsung,fimc" },
1538 { },
1539 };
1540 MODULE_DEVICE_TABLE(of, fimc_md_of_match);
1541
1542 static struct platform_driver fimc_md_driver = {
1543 .probe = fimc_md_probe,
1544 .remove = fimc_md_remove,
1545 .driver = {
1546 .of_match_table = of_match_ptr(fimc_md_of_match),
1547 .name = "s5p-fimc-md",
1548 }
1549 };
1550
1551 static int __init fimc_md_init(void)
1552 {
1553 int ret;
1554
1555 request_module("s5p-csis");
1556 ret = fimc_register_driver();
1557 if (ret)
1558 return ret;
1559
1560 return platform_driver_register(&fimc_md_driver);
1561 }
1562
1563 static void __exit fimc_md_exit(void)
1564 {
1565 platform_driver_unregister(&fimc_md_driver);
1566 fimc_unregister_driver();
1567 }
1568
1569 module_init(fimc_md_init);
1570 module_exit(fimc_md_exit);
1571
1572 MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@samsung.com>");
1573 MODULE_DESCRIPTION("S5P FIMC camera host interface/video postprocessor driver");
1574 MODULE_LICENSE("GPL");
1575 MODULE_VERSION("2.0.1");
Linux with added FPC-III support