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selinux: fix overflow and 0 length allocations
[deliverable/linux.git] / drivers / staging / media / omap4iss / iss.c
1 /*
2 * TI OMAP4 ISS V4L2 Driver
3 *
4 * Copyright (C) 2012, Texas Instruments
5 *
6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 */
13
14 #include <linux/clk.h>
15 #include <linux/delay.h>
16 #include <linux/device.h>
17 #include <linux/dma-mapping.h>
18 #include <linux/i2c.h>
19 #include <linux/interrupt.h>
20 #include <linux/mfd/syscon.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
24 #include <linux/sched.h>
25 #include <linux/vmalloc.h>
26
27 #include <media/v4l2-common.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ctrls.h>
30
31 #include "iss.h"
32 #include "iss_regs.h"
33
34 #define ISS_PRINT_REGISTER(iss, name)\
35 dev_dbg(iss->dev, "###ISS " #name "=0x%08x\n", \
36 iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_##name))
37
38 static void iss_print_status(struct iss_device *iss)
39 {
40 dev_dbg(iss->dev, "-------------ISS HL Register dump-------------\n");
41
42 ISS_PRINT_REGISTER(iss, HL_REVISION);
43 ISS_PRINT_REGISTER(iss, HL_SYSCONFIG);
44 ISS_PRINT_REGISTER(iss, HL_IRQSTATUS(5));
45 ISS_PRINT_REGISTER(iss, HL_IRQENABLE_SET(5));
46 ISS_PRINT_REGISTER(iss, HL_IRQENABLE_CLR(5));
47 ISS_PRINT_REGISTER(iss, CTRL);
48 ISS_PRINT_REGISTER(iss, CLKCTRL);
49 ISS_PRINT_REGISTER(iss, CLKSTAT);
50
51 dev_dbg(iss->dev, "-----------------------------------------------\n");
52 }
53
54 /*
55 * omap4iss_flush - Post pending L3 bus writes by doing a register readback
56 * @iss: OMAP4 ISS device
57 *
58 * In order to force posting of pending writes, we need to write and
59 * readback the same register, in this case the revision register.
60 *
61 * See this link for reference:
62 * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
63 */
64 void omap4iss_flush(struct iss_device *iss)
65 {
66 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION, 0);
67 iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
68 }
69
70 /*
71 * iss_isp_enable_interrupts - Enable ISS ISP interrupts.
72 * @iss: OMAP4 ISS device
73 */
74 static void omap4iss_isp_enable_interrupts(struct iss_device *iss)
75 {
76 static const u32 isp_irq = ISP5_IRQ_OCP_ERR |
77 ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
78 ISP5_IRQ_RSZ_FIFO_OVF |
79 ISP5_IRQ_RSZ_INT_DMA |
80 ISP5_IRQ_ISIF_INT(0);
81
82 /* Enable ISP interrupts */
83 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0), isp_irq);
84 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_SET(0),
85 isp_irq);
86 }
87
88 /*
89 * iss_isp_disable_interrupts - Disable ISS interrupts.
90 * @iss: OMAP4 ISS device
91 */
92 static void omap4iss_isp_disable_interrupts(struct iss_device *iss)
93 {
94 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_CLR(0), ~0);
95 }
96
97 /*
98 * iss_enable_interrupts - Enable ISS interrupts.
99 * @iss: OMAP4 ISS device
100 */
101 static void iss_enable_interrupts(struct iss_device *iss)
102 {
103 static const u32 hl_irq = ISS_HL_IRQ_CSIA | ISS_HL_IRQ_CSIB
104 | ISS_HL_IRQ_ISP(0);
105
106 /* Enable HL interrupts */
107 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), hl_irq);
108 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_SET(5), hl_irq);
109
110 if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
111 omap4iss_isp_enable_interrupts(iss);
112 }
113
114 /*
115 * iss_disable_interrupts - Disable ISS interrupts.
116 * @iss: OMAP4 ISS device
117 */
118 static void iss_disable_interrupts(struct iss_device *iss)
119 {
120 if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
121 omap4iss_isp_disable_interrupts(iss);
122
123 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_CLR(5), ~0);
124 }
125
126 int omap4iss_get_external_info(struct iss_pipeline *pipe,
127 struct media_link *link)
128 {
129 struct iss_device *iss =
130 container_of(pipe, struct iss_video, pipe)->iss;
131 struct v4l2_subdev_format fmt;
132 struct v4l2_ctrl *ctrl;
133 int ret;
134
135 if (!pipe->external)
136 return 0;
137
138 if (pipe->external_rate)
139 return 0;
140
141 memset(&fmt, 0, sizeof(fmt));
142
143 fmt.pad = link->source->index;
144 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
145 ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(link->sink->entity),
146 pad, get_fmt, NULL, &fmt);
147 if (ret < 0)
148 return -EPIPE;
149
150 pipe->external_bpp = omap4iss_video_format_info(fmt.format.code)->bpp;
151
152 ctrl = v4l2_ctrl_find(pipe->external->ctrl_handler,
153 V4L2_CID_PIXEL_RATE);
154 if (!ctrl) {
155 dev_warn(iss->dev, "no pixel rate control in subdev %s\n",
156 pipe->external->name);
157 return -EPIPE;
158 }
159
160 pipe->external_rate = v4l2_ctrl_g_ctrl_int64(ctrl);
161
162 return 0;
163 }
164
165 /*
166 * Configure the bridge. Valid inputs are
167 *
168 * IPIPEIF_INPUT_CSI2A: CSI2a receiver
169 * IPIPEIF_INPUT_CSI2B: CSI2b receiver
170 *
171 * The bridge and lane shifter are configured according to the selected input
172 * and the ISP platform data.
173 */
174 void omap4iss_configure_bridge(struct iss_device *iss,
175 enum ipipeif_input_entity input)
176 {
177 u32 issctrl_val;
178 u32 isp5ctrl_val;
179
180 issctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL);
181 issctrl_val &= ~ISS_CTRL_INPUT_SEL_MASK;
182 issctrl_val &= ~ISS_CTRL_CLK_DIV_MASK;
183
184 isp5ctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL);
185
186 switch (input) {
187 case IPIPEIF_INPUT_CSI2A:
188 issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2A;
189 break;
190
191 case IPIPEIF_INPUT_CSI2B:
192 issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2B;
193 break;
194
195 default:
196 return;
197 }
198
199 issctrl_val |= ISS_CTRL_SYNC_DETECT_VS_RAISING;
200
201 isp5ctrl_val |= ISP5_CTRL_VD_PULSE_EXT | ISP5_CTRL_PSYNC_CLK_SEL |
202 ISP5_CTRL_SYNC_ENABLE;
203
204 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL, issctrl_val);
205 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, isp5ctrl_val);
206 }
207
208 #ifdef ISS_ISR_DEBUG
209 static void iss_isr_dbg(struct iss_device *iss, u32 irqstatus)
210 {
211 static const char * const name[] = {
212 "ISP_0",
213 "ISP_1",
214 "ISP_2",
215 "ISP_3",
216 "CSIA",
217 "CSIB",
218 "CCP2_0",
219 "CCP2_1",
220 "CCP2_2",
221 "CCP2_3",
222 "CBUFF",
223 "BTE",
224 "SIMCOP_0",
225 "SIMCOP_1",
226 "SIMCOP_2",
227 "SIMCOP_3",
228 "CCP2_8",
229 "HS_VS",
230 "18",
231 "19",
232 "20",
233 "21",
234 "22",
235 "23",
236 "24",
237 "25",
238 "26",
239 "27",
240 "28",
241 "29",
242 "30",
243 "31",
244 };
245 unsigned int i;
246
247 dev_dbg(iss->dev, "ISS IRQ: ");
248
249 for (i = 0; i < ARRAY_SIZE(name); i++) {
250 if ((1 << i) & irqstatus)
251 pr_cont("%s ", name[i]);
252 }
253 pr_cont("\n");
254 }
255
256 static void iss_isp_isr_dbg(struct iss_device *iss, u32 irqstatus)
257 {
258 static const char * const name[] = {
259 "ISIF_0",
260 "ISIF_1",
261 "ISIF_2",
262 "ISIF_3",
263 "IPIPEREQ",
264 "IPIPELAST_PIX",
265 "IPIPEDMA",
266 "IPIPEBSC",
267 "IPIPEHST",
268 "IPIPEIF",
269 "AEW",
270 "AF",
271 "H3A",
272 "RSZ_REG",
273 "RSZ_LAST_PIX",
274 "RSZ_DMA",
275 "RSZ_CYC_RZA",
276 "RSZ_CYC_RZB",
277 "RSZ_FIFO_OVF",
278 "RSZ_FIFO_IN_BLK_ERR",
279 "20",
280 "21",
281 "RSZ_EOF0",
282 "RSZ_EOF1",
283 "H3A_EOF",
284 "IPIPE_EOF",
285 "26",
286 "IPIPE_DPC_INI",
287 "IPIPE_DPC_RNEW0",
288 "IPIPE_DPC_RNEW1",
289 "30",
290 "OCP_ERR",
291 };
292 unsigned int i;
293
294 dev_dbg(iss->dev, "ISP IRQ: ");
295
296 for (i = 0; i < ARRAY_SIZE(name); i++) {
297 if ((1 << i) & irqstatus)
298 pr_cont("%s ", name[i]);
299 }
300 pr_cont("\n");
301 }
302 #endif
303
304 /*
305 * iss_isr - Interrupt Service Routine for ISS module.
306 * @irq: Not used currently.
307 * @_iss: Pointer to the OMAP4 ISS device
308 *
309 * Handles the corresponding callback if plugged in.
310 *
311 * Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
312 * IRQ wasn't handled.
313 */
314 static irqreturn_t iss_isr(int irq, void *_iss)
315 {
316 static const u32 ipipeif_events = ISP5_IRQ_IPIPEIF_IRQ |
317 ISP5_IRQ_ISIF_INT(0);
318 static const u32 resizer_events = ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
319 ISP5_IRQ_RSZ_FIFO_OVF |
320 ISP5_IRQ_RSZ_INT_DMA;
321 struct iss_device *iss = _iss;
322 u32 irqstatus;
323
324 irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5));
325 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), irqstatus);
326
327 if (irqstatus & ISS_HL_IRQ_CSIA)
328 omap4iss_csi2_isr(&iss->csi2a);
329
330 if (irqstatus & ISS_HL_IRQ_CSIB)
331 omap4iss_csi2_isr(&iss->csi2b);
332
333 if (irqstatus & ISS_HL_IRQ_ISP(0)) {
334 u32 isp_irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1,
335 ISP5_IRQSTATUS(0));
336 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0),
337 isp_irqstatus);
338
339 if (isp_irqstatus & ISP5_IRQ_OCP_ERR)
340 dev_dbg(iss->dev, "ISP5 OCP Error!\n");
341
342 if (isp_irqstatus & ipipeif_events) {
343 omap4iss_ipipeif_isr(&iss->ipipeif,
344 isp_irqstatus & ipipeif_events);
345 }
346
347 if (isp_irqstatus & resizer_events)
348 omap4iss_resizer_isr(&iss->resizer,
349 isp_irqstatus & resizer_events);
350
351 #ifdef ISS_ISR_DEBUG
352 iss_isp_isr_dbg(iss, isp_irqstatus);
353 #endif
354 }
355
356 omap4iss_flush(iss);
357
358 #ifdef ISS_ISR_DEBUG
359 iss_isr_dbg(iss, irqstatus);
360 #endif
361
362 return IRQ_HANDLED;
363 }
364
365 /* -----------------------------------------------------------------------------
366 * Pipeline stream management
367 */
368
369 /*
370 * iss_pipeline_disable - Disable streaming on a pipeline
371 * @pipe: ISS pipeline
372 * @until: entity at which to stop pipeline walk
373 *
374 * Walk the entities chain starting at the pipeline output video node and stop
375 * all modules in the chain. Wait synchronously for the modules to be stopped if
376 * necessary.
377 *
378 * If the until argument isn't NULL, stop the pipeline walk when reaching the
379 * until entity. This is used to disable a partially started pipeline due to a
380 * subdev start error.
381 */
382 static int iss_pipeline_disable(struct iss_pipeline *pipe,
383 struct media_entity *until)
384 {
385 struct iss_device *iss = pipe->output->iss;
386 struct media_entity *entity;
387 struct media_pad *pad;
388 struct v4l2_subdev *subdev;
389 int failure = 0;
390 int ret;
391
392 entity = &pipe->output->video.entity;
393 while (1) {
394 pad = &entity->pads[0];
395 if (!(pad->flags & MEDIA_PAD_FL_SINK))
396 break;
397
398 pad = media_entity_remote_pad(pad);
399 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
400 break;
401
402 entity = pad->entity;
403 if (entity == until)
404 break;
405
406 subdev = media_entity_to_v4l2_subdev(entity);
407 ret = v4l2_subdev_call(subdev, video, s_stream, 0);
408 if (ret < 0) {
409 dev_warn(iss->dev, "%s: module stop timeout.\n",
410 subdev->name);
411 /* If the entity failed to stopped, assume it has
412 * crashed. Mark it as such, the ISS will be reset when
413 * applications will release it.
414 */
415 media_entity_enum_set(&iss->crashed, &subdev->entity);
416 failure = -ETIMEDOUT;
417 }
418 }
419
420 return failure;
421 }
422
423 /*
424 * iss_pipeline_enable - Enable streaming on a pipeline
425 * @pipe: ISS pipeline
426 * @mode: Stream mode (single shot or continuous)
427 *
428 * Walk the entities chain starting at the pipeline output video node and start
429 * all modules in the chain in the given mode.
430 *
431 * Return 0 if successful, or the return value of the failed video::s_stream
432 * operation otherwise.
433 */
434 static int iss_pipeline_enable(struct iss_pipeline *pipe,
435 enum iss_pipeline_stream_state mode)
436 {
437 struct iss_device *iss = pipe->output->iss;
438 struct media_entity *entity;
439 struct media_pad *pad;
440 struct v4l2_subdev *subdev;
441 unsigned long flags;
442 int ret;
443
444 /* If one of the entities in the pipeline has crashed it will not work
445 * properly. Refuse to start streaming in that case. This check must be
446 * performed before the loop below to avoid starting entities if the
447 * pipeline won't start anyway (those entities would then likely fail to
448 * stop, making the problem worse).
449 */
450 if (media_entity_enum_intersects(&pipe->ent_enum, &iss->crashed))
451 return -EIO;
452
453 spin_lock_irqsave(&pipe->lock, flags);
454 pipe->state &= ~(ISS_PIPELINE_IDLE_INPUT | ISS_PIPELINE_IDLE_OUTPUT);
455 spin_unlock_irqrestore(&pipe->lock, flags);
456
457 pipe->do_propagation = false;
458
459 entity = &pipe->output->video.entity;
460 while (1) {
461 pad = &entity->pads[0];
462 if (!(pad->flags & MEDIA_PAD_FL_SINK))
463 break;
464
465 pad = media_entity_remote_pad(pad);
466 if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
467 break;
468
469 entity = pad->entity;
470 subdev = media_entity_to_v4l2_subdev(entity);
471
472 ret = v4l2_subdev_call(subdev, video, s_stream, mode);
473 if (ret < 0 && ret != -ENOIOCTLCMD) {
474 iss_pipeline_disable(pipe, entity);
475 return ret;
476 }
477
478 if (subdev == &iss->csi2a.subdev ||
479 subdev == &iss->csi2b.subdev)
480 pipe->do_propagation = true;
481 }
482
483 iss_print_status(pipe->output->iss);
484 return 0;
485 }
486
487 /*
488 * omap4iss_pipeline_set_stream - Enable/disable streaming on a pipeline
489 * @pipe: ISS pipeline
490 * @state: Stream state (stopped, single shot or continuous)
491 *
492 * Set the pipeline to the given stream state. Pipelines can be started in
493 * single-shot or continuous mode.
494 *
495 * Return 0 if successful, or the return value of the failed video::s_stream
496 * operation otherwise. The pipeline state is not updated when the operation
497 * fails, except when stopping the pipeline.
498 */
499 int omap4iss_pipeline_set_stream(struct iss_pipeline *pipe,
500 enum iss_pipeline_stream_state state)
501 {
502 int ret;
503
504 if (state == ISS_PIPELINE_STREAM_STOPPED)
505 ret = iss_pipeline_disable(pipe, NULL);
506 else
507 ret = iss_pipeline_enable(pipe, state);
508
509 if (ret == 0 || state == ISS_PIPELINE_STREAM_STOPPED)
510 pipe->stream_state = state;
511
512 return ret;
513 }
514
515 /*
516 * omap4iss_pipeline_cancel_stream - Cancel stream on a pipeline
517 * @pipe: ISS pipeline
518 *
519 * Cancelling a stream mark all buffers on all video nodes in the pipeline as
520 * erroneous and makes sure no new buffer can be queued. This function is called
521 * when a fatal error that prevents any further operation on the pipeline
522 * occurs.
523 */
524 void omap4iss_pipeline_cancel_stream(struct iss_pipeline *pipe)
525 {
526 if (pipe->input)
527 omap4iss_video_cancel_stream(pipe->input);
528 if (pipe->output)
529 omap4iss_video_cancel_stream(pipe->output);
530 }
531
532 /*
533 * iss_pipeline_is_last - Verify if entity has an enabled link to the output
534 * video node
535 * @me: ISS module's media entity
536 *
537 * Returns 1 if the entity has an enabled link to the output video node or 0
538 * otherwise. It's true only while pipeline can have no more than one output
539 * node.
540 */
541 static int iss_pipeline_is_last(struct media_entity *me)
542 {
543 struct iss_pipeline *pipe;
544 struct media_pad *pad;
545
546 if (!me->pipe)
547 return 0;
548 pipe = to_iss_pipeline(me);
549 if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED)
550 return 0;
551 pad = media_entity_remote_pad(&pipe->output->pad);
552 return pad->entity == me;
553 }
554
555 static int iss_reset(struct iss_device *iss)
556 {
557 unsigned int timeout;
558
559 iss_reg_set(iss, OMAP4_ISS_MEM_TOP, ISS_HL_SYSCONFIG,
560 ISS_HL_SYSCONFIG_SOFTRESET);
561
562 timeout = iss_poll_condition_timeout(
563 !(iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_SYSCONFIG) &
564 ISS_HL_SYSCONFIG_SOFTRESET), 1000, 10, 100);
565 if (timeout) {
566 dev_err(iss->dev, "ISS reset timeout\n");
567 return -ETIMEDOUT;
568 }
569
570 media_entity_enum_zero(&iss->crashed);
571
572 return 0;
573 }
574
575 static int iss_isp_reset(struct iss_device *iss)
576 {
577 unsigned int timeout;
578
579 /* Fist, ensure that the ISP is IDLE (no transactions happening) */
580 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG,
581 ISP5_SYSCONFIG_STANDBYMODE_MASK,
582 ISP5_SYSCONFIG_STANDBYMODE_SMART);
583
584 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, ISP5_CTRL_MSTANDBY);
585
586 timeout = iss_poll_condition_timeout(
587 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL) &
588 ISP5_CTRL_MSTANDBY_WAIT, 1000000, 1000, 1500);
589 if (timeout) {
590 dev_err(iss->dev, "ISP5 standby timeout\n");
591 return -ETIMEDOUT;
592 }
593
594 /* Now finally, do the reset */
595 iss_reg_set(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG,
596 ISP5_SYSCONFIG_SOFTRESET);
597
598 timeout = iss_poll_condition_timeout(
599 !(iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_SYSCONFIG) &
600 ISP5_SYSCONFIG_SOFTRESET), 1000000, 1000, 1500);
601 if (timeout) {
602 dev_err(iss->dev, "ISP5 reset timeout\n");
603 return -ETIMEDOUT;
604 }
605
606 return 0;
607 }
608
609 /*
610 * iss_module_sync_idle - Helper to sync module with its idle state
611 * @me: ISS submodule's media entity
612 * @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
613 * @stopping: flag which tells module wants to stop
614 *
615 * This function checks if ISS submodule needs to wait for next interrupt. If
616 * yes, makes the caller to sleep while waiting for such event.
617 */
618 int omap4iss_module_sync_idle(struct media_entity *me, wait_queue_head_t *wait,
619 atomic_t *stopping)
620 {
621 struct iss_pipeline *pipe = to_iss_pipeline(me);
622 struct iss_video *video = pipe->output;
623 unsigned long flags;
624
625 if (pipe->stream_state == ISS_PIPELINE_STREAM_STOPPED ||
626 (pipe->stream_state == ISS_PIPELINE_STREAM_SINGLESHOT &&
627 !iss_pipeline_ready(pipe)))
628 return 0;
629
630 /*
631 * atomic_set() doesn't include memory barrier on ARM platform for SMP
632 * scenario. We'll call it here to avoid race conditions.
633 */
634 atomic_set(stopping, 1);
635 smp_wmb();
636
637 /*
638 * If module is the last one, it's writing to memory. In this case,
639 * it's necessary to check if the module is already paused due to
640 * DMA queue underrun or if it has to wait for next interrupt to be
641 * idle.
642 * If it isn't the last one, the function won't sleep but *stopping
643 * will still be set to warn next submodule caller's interrupt the
644 * module wants to be idle.
645 */
646 if (!iss_pipeline_is_last(me))
647 return 0;
648
649 spin_lock_irqsave(&video->qlock, flags);
650 if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
651 spin_unlock_irqrestore(&video->qlock, flags);
652 atomic_set(stopping, 0);
653 smp_wmb();
654 return 0;
655 }
656 spin_unlock_irqrestore(&video->qlock, flags);
657 if (!wait_event_timeout(*wait, !atomic_read(stopping),
658 msecs_to_jiffies(1000))) {
659 atomic_set(stopping, 0);
660 smp_wmb();
661 return -ETIMEDOUT;
662 }
663
664 return 0;
665 }
666
667 /*
668 * omap4iss_module_sync_is_stopped - Helper to verify if module was stopping
669 * @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
670 * @stopping: flag which tells module wants to stop
671 *
672 * This function checks if ISS submodule was stopping. In case of yes, it
673 * notices the caller by setting stopping to 0 and waking up the wait queue.
674 * Returns 1 if it was stopping or 0 otherwise.
675 */
676 int omap4iss_module_sync_is_stopping(wait_queue_head_t *wait,
677 atomic_t *stopping)
678 {
679 if (atomic_cmpxchg(stopping, 1, 0)) {
680 wake_up(wait);
681 return 1;
682 }
683
684 return 0;
685 }
686
687 /* --------------------------------------------------------------------------
688 * Clock management
689 */
690
691 #define ISS_CLKCTRL_MASK (ISS_CLKCTRL_CSI2_A |\
692 ISS_CLKCTRL_CSI2_B |\
693 ISS_CLKCTRL_ISP)
694
695 static int __iss_subclk_update(struct iss_device *iss)
696 {
697 u32 clk = 0;
698 int ret = 0, timeout = 1000;
699
700 if (iss->subclk_resources & OMAP4_ISS_SUBCLK_CSI2_A)
701 clk |= ISS_CLKCTRL_CSI2_A;
702
703 if (iss->subclk_resources & OMAP4_ISS_SUBCLK_CSI2_B)
704 clk |= ISS_CLKCTRL_CSI2_B;
705
706 if (iss->subclk_resources & OMAP4_ISS_SUBCLK_ISP)
707 clk |= ISS_CLKCTRL_ISP;
708
709 iss_reg_update(iss, OMAP4_ISS_MEM_TOP, ISS_CLKCTRL,
710 ISS_CLKCTRL_MASK, clk);
711
712 /* Wait for HW assertion */
713 while (--timeout > 0) {
714 udelay(1);
715 if ((iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CLKSTAT) &
716 ISS_CLKCTRL_MASK) == clk)
717 break;
718 }
719
720 if (!timeout)
721 ret = -EBUSY;
722
723 return ret;
724 }
725
726 int omap4iss_subclk_enable(struct iss_device *iss,
727 enum iss_subclk_resource res)
728 {
729 iss->subclk_resources |= res;
730
731 return __iss_subclk_update(iss);
732 }
733
734 int omap4iss_subclk_disable(struct iss_device *iss,
735 enum iss_subclk_resource res)
736 {
737 iss->subclk_resources &= ~res;
738
739 return __iss_subclk_update(iss);
740 }
741
742 #define ISS_ISP5_CLKCTRL_MASK (ISP5_CTRL_BL_CLK_ENABLE |\
743 ISP5_CTRL_ISIF_CLK_ENABLE |\
744 ISP5_CTRL_H3A_CLK_ENABLE |\
745 ISP5_CTRL_RSZ_CLK_ENABLE |\
746 ISP5_CTRL_IPIPE_CLK_ENABLE |\
747 ISP5_CTRL_IPIPEIF_CLK_ENABLE)
748
749 static void __iss_isp_subclk_update(struct iss_device *iss)
750 {
751 u32 clk = 0;
752
753 if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_ISIF)
754 clk |= ISP5_CTRL_ISIF_CLK_ENABLE;
755
756 if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_H3A)
757 clk |= ISP5_CTRL_H3A_CLK_ENABLE;
758
759 if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_RSZ)
760 clk |= ISP5_CTRL_RSZ_CLK_ENABLE;
761
762 if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_IPIPE)
763 clk |= ISP5_CTRL_IPIPE_CLK_ENABLE;
764
765 if (iss->isp_subclk_resources & OMAP4_ISS_ISP_SUBCLK_IPIPEIF)
766 clk |= ISP5_CTRL_IPIPEIF_CLK_ENABLE;
767
768 if (clk)
769 clk |= ISP5_CTRL_BL_CLK_ENABLE;
770
771 iss_reg_update(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL,
772 ISS_ISP5_CLKCTRL_MASK, clk);
773 }
774
775 void omap4iss_isp_subclk_enable(struct iss_device *iss,
776 enum iss_isp_subclk_resource res)
777 {
778 iss->isp_subclk_resources |= res;
779
780 __iss_isp_subclk_update(iss);
781 }
782
783 void omap4iss_isp_subclk_disable(struct iss_device *iss,
784 enum iss_isp_subclk_resource res)
785 {
786 iss->isp_subclk_resources &= ~res;
787
788 __iss_isp_subclk_update(iss);
789 }
790
791 /*
792 * iss_enable_clocks - Enable ISS clocks
793 * @iss: OMAP4 ISS device
794 *
795 * Return 0 if successful, or clk_enable return value if any of tthem fails.
796 */
797 static int iss_enable_clocks(struct iss_device *iss)
798 {
799 int ret;
800
801 ret = clk_enable(iss->iss_fck);
802 if (ret) {
803 dev_err(iss->dev, "clk_enable iss_fck failed\n");
804 return ret;
805 }
806
807 ret = clk_enable(iss->iss_ctrlclk);
808 if (ret) {
809 dev_err(iss->dev, "clk_enable iss_ctrlclk failed\n");
810 clk_disable(iss->iss_fck);
811 return ret;
812 }
813
814 return 0;
815 }
816
817 /*
818 * iss_disable_clocks - Disable ISS clocks
819 * @iss: OMAP4 ISS device
820 */
821 static void iss_disable_clocks(struct iss_device *iss)
822 {
823 clk_disable(iss->iss_ctrlclk);
824 clk_disable(iss->iss_fck);
825 }
826
827 static int iss_get_clocks(struct iss_device *iss)
828 {
829 iss->iss_fck = devm_clk_get(iss->dev, "iss_fck");
830 if (IS_ERR(iss->iss_fck)) {
831 dev_err(iss->dev, "Unable to get iss_fck clock info\n");
832 return PTR_ERR(iss->iss_fck);
833 }
834
835 iss->iss_ctrlclk = devm_clk_get(iss->dev, "iss_ctrlclk");
836 if (IS_ERR(iss->iss_ctrlclk)) {
837 dev_err(iss->dev, "Unable to get iss_ctrlclk clock info\n");
838 return PTR_ERR(iss->iss_ctrlclk);
839 }
840
841 return 0;
842 }
843
844 /*
845 * omap4iss_get - Acquire the ISS resource.
846 *
847 * Initializes the clocks for the first acquire.
848 *
849 * Increment the reference count on the ISS. If the first reference is taken,
850 * enable clocks and power-up all submodules.
851 *
852 * Return a pointer to the ISS device structure, or NULL if an error occurred.
853 */
854 struct iss_device *omap4iss_get(struct iss_device *iss)
855 {
856 struct iss_device *__iss = iss;
857
858 if (!iss)
859 return NULL;
860
861 mutex_lock(&iss->iss_mutex);
862 if (iss->ref_count > 0)
863 goto out;
864
865 if (iss_enable_clocks(iss) < 0) {
866 __iss = NULL;
867 goto out;
868 }
869
870 iss_enable_interrupts(iss);
871
872 out:
873 if (__iss)
874 iss->ref_count++;
875 mutex_unlock(&iss->iss_mutex);
876
877 return __iss;
878 }
879
880 /*
881 * omap4iss_put - Release the ISS
882 *
883 * Decrement the reference count on the ISS. If the last reference is released,
884 * power-down all submodules, disable clocks and free temporary buffers.
885 */
886 void omap4iss_put(struct iss_device *iss)
887 {
888 if (!iss)
889 return;
890
891 mutex_lock(&iss->iss_mutex);
892 BUG_ON(iss->ref_count == 0);
893 if (--iss->ref_count == 0) {
894 iss_disable_interrupts(iss);
895 /* Reset the ISS if an entity has failed to stop. This is the
896 * only way to recover from such conditions, although it would
897 * be worth investigating whether resetting the ISP only can't
898 * fix the problem in some cases.
899 */
900 if (!media_entity_enum_empty(&iss->crashed))
901 iss_reset(iss);
902 iss_disable_clocks(iss);
903 }
904 mutex_unlock(&iss->iss_mutex);
905 }
906
907 static int iss_map_mem_resource(struct platform_device *pdev,
908 struct iss_device *iss,
909 enum iss_mem_resources res)
910 {
911 struct resource *mem;
912
913 mem = platform_get_resource(pdev, IORESOURCE_MEM, res);
914
915 iss->regs[res] = devm_ioremap_resource(iss->dev, mem);
916
917 return PTR_ERR_OR_ZERO(iss->regs[res]);
918 }
919
920 static void iss_unregister_entities(struct iss_device *iss)
921 {
922 omap4iss_resizer_unregister_entities(&iss->resizer);
923 omap4iss_ipipe_unregister_entities(&iss->ipipe);
924 omap4iss_ipipeif_unregister_entities(&iss->ipipeif);
925 omap4iss_csi2_unregister_entities(&iss->csi2a);
926 omap4iss_csi2_unregister_entities(&iss->csi2b);
927
928 v4l2_device_unregister(&iss->v4l2_dev);
929 media_device_unregister(&iss->media_dev);
930 }
931
932 /*
933 * iss_register_subdev_group - Register a group of subdevices
934 * @iss: OMAP4 ISS device
935 * @board_info: I2C subdevs board information array
936 *
937 * Register all I2C subdevices in the board_info array. The array must be
938 * terminated by a NULL entry, and the first entry must be the sensor.
939 *
940 * Return a pointer to the sensor media entity if it has been successfully
941 * registered, or NULL otherwise.
942 */
943 static struct v4l2_subdev *
944 iss_register_subdev_group(struct iss_device *iss,
945 struct iss_subdev_i2c_board_info *board_info)
946 {
947 struct v4l2_subdev *sensor = NULL;
948 unsigned int first;
949
950 if (!board_info->board_info)
951 return NULL;
952
953 for (first = 1; board_info->board_info; ++board_info, first = 0) {
954 struct v4l2_subdev *subdev;
955 struct i2c_adapter *adapter;
956
957 adapter = i2c_get_adapter(board_info->i2c_adapter_id);
958 if (!adapter) {
959 dev_err(iss->dev,
960 "%s: Unable to get I2C adapter %d for device %s\n",
961 __func__, board_info->i2c_adapter_id,
962 board_info->board_info->type);
963 continue;
964 }
965
966 subdev = v4l2_i2c_new_subdev_board(&iss->v4l2_dev, adapter,
967 board_info->board_info, NULL);
968 if (!subdev) {
969 dev_err(iss->dev, "Unable to register subdev %s\n",
970 board_info->board_info->type);
971 continue;
972 }
973
974 if (first)
975 sensor = subdev;
976 }
977
978 return sensor;
979 }
980
981 static int iss_register_entities(struct iss_device *iss)
982 {
983 struct iss_platform_data *pdata = iss->pdata;
984 struct iss_v4l2_subdevs_group *subdevs;
985 int ret;
986
987 iss->media_dev.dev = iss->dev;
988 strlcpy(iss->media_dev.model, "TI OMAP4 ISS",
989 sizeof(iss->media_dev.model));
990 iss->media_dev.hw_revision = iss->revision;
991 iss->media_dev.link_notify = v4l2_pipeline_link_notify;
992 ret = media_device_register(&iss->media_dev);
993 if (ret < 0) {
994 dev_err(iss->dev, "Media device registration failed (%d)\n",
995 ret);
996 return ret;
997 }
998
999 iss->v4l2_dev.mdev = &iss->media_dev;
1000 ret = v4l2_device_register(iss->dev, &iss->v4l2_dev);
1001 if (ret < 0) {
1002 dev_err(iss->dev, "V4L2 device registration failed (%d)\n",
1003 ret);
1004 goto done;
1005 }
1006
1007 /* Register internal entities */
1008 ret = omap4iss_csi2_register_entities(&iss->csi2a, &iss->v4l2_dev);
1009 if (ret < 0)
1010 goto done;
1011
1012 ret = omap4iss_csi2_register_entities(&iss->csi2b, &iss->v4l2_dev);
1013 if (ret < 0)
1014 goto done;
1015
1016 ret = omap4iss_ipipeif_register_entities(&iss->ipipeif, &iss->v4l2_dev);
1017 if (ret < 0)
1018 goto done;
1019
1020 ret = omap4iss_ipipe_register_entities(&iss->ipipe, &iss->v4l2_dev);
1021 if (ret < 0)
1022 goto done;
1023
1024 ret = omap4iss_resizer_register_entities(&iss->resizer, &iss->v4l2_dev);
1025 if (ret < 0)
1026 goto done;
1027
1028 /* Register external entities */
1029 for (subdevs = pdata->subdevs; subdevs && subdevs->subdevs; ++subdevs) {
1030 struct v4l2_subdev *sensor;
1031 struct media_entity *input;
1032 unsigned int flags;
1033 unsigned int pad;
1034
1035 sensor = iss_register_subdev_group(iss, subdevs->subdevs);
1036 if (!sensor)
1037 continue;
1038
1039 sensor->host_priv = subdevs;
1040
1041 /* Connect the sensor to the correct interface module.
1042 * CSI2a receiver through CSIPHY1, or
1043 * CSI2b receiver through CSIPHY2
1044 */
1045 switch (subdevs->interface) {
1046 case ISS_INTERFACE_CSI2A_PHY1:
1047 input = &iss->csi2a.subdev.entity;
1048 pad = CSI2_PAD_SINK;
1049 flags = MEDIA_LNK_FL_IMMUTABLE
1050 | MEDIA_LNK_FL_ENABLED;
1051 break;
1052
1053 case ISS_INTERFACE_CSI2B_PHY2:
1054 input = &iss->csi2b.subdev.entity;
1055 pad = CSI2_PAD_SINK;
1056 flags = MEDIA_LNK_FL_IMMUTABLE
1057 | MEDIA_LNK_FL_ENABLED;
1058 break;
1059
1060 default:
1061 dev_err(iss->dev, "invalid interface type %u\n",
1062 subdevs->interface);
1063 ret = -EINVAL;
1064 goto done;
1065 }
1066
1067 ret = media_create_pad_link(&sensor->entity, 0, input, pad,
1068 flags);
1069 if (ret < 0)
1070 goto done;
1071 }
1072
1073 ret = v4l2_device_register_subdev_nodes(&iss->v4l2_dev);
1074
1075 done:
1076 if (ret < 0)
1077 iss_unregister_entities(iss);
1078
1079 return ret;
1080 }
1081
1082 /*
1083 * iss_create_links() - Pads links creation for the subdevices
1084 * @iss : Pointer to ISS device
1085 *
1086 * return negative error code or zero on success
1087 */
1088 static int iss_create_links(struct iss_device *iss)
1089 {
1090 int ret;
1091
1092 ret = omap4iss_csi2_create_links(iss);
1093 if (ret < 0) {
1094 dev_err(iss->dev, "CSI2 pads links creation failed\n");
1095 return ret;
1096 }
1097
1098 ret = omap4iss_ipipeif_create_links(iss);
1099 if (ret < 0) {
1100 dev_err(iss->dev, "ISP IPIPEIF pads links creation failed\n");
1101 return ret;
1102 }
1103
1104 ret = omap4iss_resizer_create_links(iss);
1105 if (ret < 0) {
1106 dev_err(iss->dev, "ISP RESIZER pads links creation failed\n");
1107 return ret;
1108 }
1109
1110 /* Connect the submodules. */
1111 ret = media_create_pad_link(
1112 &iss->csi2a.subdev.entity, CSI2_PAD_SOURCE,
1113 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
1114 if (ret < 0)
1115 return ret;
1116
1117 ret = media_create_pad_link(
1118 &iss->csi2b.subdev.entity, CSI2_PAD_SOURCE,
1119 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
1120 if (ret < 0)
1121 return ret;
1122
1123 ret = media_create_pad_link(
1124 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
1125 &iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
1126 if (ret < 0)
1127 return ret;
1128
1129 ret = media_create_pad_link(
1130 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
1131 &iss->ipipe.subdev.entity, IPIPE_PAD_SINK, 0);
1132 if (ret < 0)
1133 return ret;
1134
1135 ret = media_create_pad_link(
1136 &iss->ipipe.subdev.entity, IPIPE_PAD_SOURCE_VP,
1137 &iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
1138 if (ret < 0)
1139 return ret;
1140
1141 return 0;
1142 };
1143
1144 static void iss_cleanup_modules(struct iss_device *iss)
1145 {
1146 omap4iss_csi2_cleanup(iss);
1147 omap4iss_ipipeif_cleanup(iss);
1148 omap4iss_ipipe_cleanup(iss);
1149 omap4iss_resizer_cleanup(iss);
1150 }
1151
1152 static int iss_initialize_modules(struct iss_device *iss)
1153 {
1154 int ret;
1155
1156 ret = omap4iss_csiphy_init(iss);
1157 if (ret < 0) {
1158 dev_err(iss->dev, "CSI PHY initialization failed\n");
1159 goto error_csiphy;
1160 }
1161
1162 ret = omap4iss_csi2_init(iss);
1163 if (ret < 0) {
1164 dev_err(iss->dev, "CSI2 initialization failed\n");
1165 goto error_csi2;
1166 }
1167
1168 ret = omap4iss_ipipeif_init(iss);
1169 if (ret < 0) {
1170 dev_err(iss->dev, "ISP IPIPEIF initialization failed\n");
1171 goto error_ipipeif;
1172 }
1173
1174 ret = omap4iss_ipipe_init(iss);
1175 if (ret < 0) {
1176 dev_err(iss->dev, "ISP IPIPE initialization failed\n");
1177 goto error_ipipe;
1178 }
1179
1180 ret = omap4iss_resizer_init(iss);
1181 if (ret < 0) {
1182 dev_err(iss->dev, "ISP RESIZER initialization failed\n");
1183 goto error_resizer;
1184 }
1185
1186 return 0;
1187
1188 error_resizer:
1189 omap4iss_ipipe_cleanup(iss);
1190 error_ipipe:
1191 omap4iss_ipipeif_cleanup(iss);
1192 error_ipipeif:
1193 omap4iss_csi2_cleanup(iss);
1194 error_csi2:
1195 error_csiphy:
1196 return ret;
1197 }
1198
1199 static int iss_probe(struct platform_device *pdev)
1200 {
1201 struct iss_platform_data *pdata = pdev->dev.platform_data;
1202 struct iss_device *iss;
1203 unsigned int i;
1204 int ret;
1205
1206 if (!pdata)
1207 return -EINVAL;
1208
1209 iss = devm_kzalloc(&pdev->dev, sizeof(*iss), GFP_KERNEL);
1210 if (!iss)
1211 return -ENOMEM;
1212
1213 mutex_init(&iss->iss_mutex);
1214
1215 iss->dev = &pdev->dev;
1216 iss->pdata = pdata;
1217
1218 iss->raw_dmamask = DMA_BIT_MASK(32);
1219 iss->dev->dma_mask = &iss->raw_dmamask;
1220 iss->dev->coherent_dma_mask = DMA_BIT_MASK(32);
1221
1222 platform_set_drvdata(pdev, iss);
1223
1224 /*
1225 * TODO: When implementing DT support switch to syscon regmap lookup by
1226 * phandle.
1227 */
1228 iss->syscon = syscon_regmap_lookup_by_compatible("syscon");
1229 if (IS_ERR(iss->syscon)) {
1230 ret = PTR_ERR(iss->syscon);
1231 goto error;
1232 }
1233
1234 /* Clocks */
1235 ret = iss_map_mem_resource(pdev, iss, OMAP4_ISS_MEM_TOP);
1236 if (ret < 0)
1237 goto error;
1238
1239 ret = iss_get_clocks(iss);
1240 if (ret < 0)
1241 goto error;
1242
1243 if (!omap4iss_get(iss))
1244 goto error;
1245
1246 ret = iss_reset(iss);
1247 if (ret < 0)
1248 goto error_iss;
1249
1250 iss->revision = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
1251 dev_info(iss->dev, "Revision %08x found\n", iss->revision);
1252
1253 for (i = 1; i < OMAP4_ISS_MEM_LAST; i++) {
1254 ret = iss_map_mem_resource(pdev, iss, i);
1255 if (ret)
1256 goto error_iss;
1257 }
1258
1259 /* Configure BTE BW_LIMITER field to max recommended value (1 GB) */
1260 iss_reg_update(iss, OMAP4_ISS_MEM_BTE, BTE_CTRL,
1261 BTE_CTRL_BW_LIMITER_MASK,
1262 18 << BTE_CTRL_BW_LIMITER_SHIFT);
1263
1264 /* Perform ISP reset */
1265 ret = omap4iss_subclk_enable(iss, OMAP4_ISS_SUBCLK_ISP);
1266 if (ret < 0)
1267 goto error_iss;
1268
1269 ret = iss_isp_reset(iss);
1270 if (ret < 0)
1271 goto error_iss;
1272
1273 dev_info(iss->dev, "ISP Revision %08x found\n",
1274 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_REVISION));
1275
1276 /* Interrupt */
1277 ret = platform_get_irq(pdev, 0);
1278 if (ret <= 0) {
1279 dev_err(iss->dev, "No IRQ resource\n");
1280 ret = -ENODEV;
1281 goto error_iss;
1282 }
1283 iss->irq_num = ret;
1284
1285 if (devm_request_irq(iss->dev, iss->irq_num, iss_isr, IRQF_SHARED,
1286 "OMAP4 ISS", iss)) {
1287 dev_err(iss->dev, "Unable to request IRQ\n");
1288 ret = -EINVAL;
1289 goto error_iss;
1290 }
1291
1292 /* Entities */
1293 ret = iss_initialize_modules(iss);
1294 if (ret < 0)
1295 goto error_iss;
1296
1297 ret = iss_register_entities(iss);
1298 if (ret < 0)
1299 goto error_modules;
1300
1301 ret = media_entity_enum_init(&iss->crashed, &iss->media_dev);
1302 if (ret)
1303 goto error_entities;
1304
1305 ret = iss_create_links(iss);
1306 if (ret < 0)
1307 goto error_entities;
1308
1309 omap4iss_put(iss);
1310
1311 return 0;
1312
1313 error_entities:
1314 iss_unregister_entities(iss);
1315 media_entity_enum_cleanup(&iss->crashed);
1316 error_modules:
1317 iss_cleanup_modules(iss);
1318 error_iss:
1319 omap4iss_put(iss);
1320 error:
1321 mutex_destroy(&iss->iss_mutex);
1322
1323 return ret;
1324 }
1325
1326 static int iss_remove(struct platform_device *pdev)
1327 {
1328 struct iss_device *iss = platform_get_drvdata(pdev);
1329
1330 iss_unregister_entities(iss);
1331 media_entity_enum_cleanup(&iss->crashed);
1332 iss_cleanup_modules(iss);
1333
1334 return 0;
1335 }
1336
1337 static const struct platform_device_id omap4iss_id_table[] = {
1338 { "omap4iss", 0 },
1339 { },
1340 };
1341 MODULE_DEVICE_TABLE(platform, omap4iss_id_table);
1342
1343 static struct platform_driver iss_driver = {
1344 .probe = iss_probe,
1345 .remove = iss_remove,
1346 .id_table = omap4iss_id_table,
1347 .driver = {
1348 .name = "omap4iss",
1349 },
1350 };
1351
1352 module_platform_driver(iss_driver);
1353
1354 MODULE_DESCRIPTION("TI OMAP4 ISS driver");
1355 MODULE_AUTHOR("Sergio Aguirre <sergio.a.aguirre@gmail.com>");
1356 MODULE_LICENSE("GPL");
1357 MODULE_VERSION(ISS_VIDEO_DRIVER_VERSION);
Linux kernel - Deliverables
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