1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * TI OMAP4 ISS V4L2 Driver
4 *
5 * Copyright (C) 2012, Texas Instruments
6 *
7 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
8 */
9
10 #include <linux/clk.h>
11 #include <linux/delay.h>
12 #include <linux/device.h>
13 #include <linux/dma-mapping.h>
14 #include <linux/i2c.h>
15 #include <linux/interrupt.h>
16 #include <linux/mfd/syscon.h>
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/slab.h>
20 #include <linux/sched.h>
21 #include <linux/vmalloc.h>
22
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-device.h>
25 #include <media/v4l2-ctrls.h>
26
27 #include "iss.h"
28 #include "iss_regs.h"
29
30 #define ISS_PRINT_REGISTER(iss, name)\
31 dev_dbg(iss->dev, "###ISS " #name "=0x%08x\n", \
32 iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_##name))
33
iss_print_status(struct iss_device * iss)34 static void iss_print_status(struct iss_device *iss)
35 {
36 dev_dbg(iss->dev, "-------------ISS HL Register dump-------------\n");
37
38 ISS_PRINT_REGISTER(iss, HL_REVISION);
39 ISS_PRINT_REGISTER(iss, HL_SYSCONFIG);
40 ISS_PRINT_REGISTER(iss, HL_IRQSTATUS(5));
41 ISS_PRINT_REGISTER(iss, HL_IRQENABLE_SET(5));
42 ISS_PRINT_REGISTER(iss, HL_IRQENABLE_CLR(5));
43 ISS_PRINT_REGISTER(iss, CTRL);
44 ISS_PRINT_REGISTER(iss, CLKCTRL);
45 ISS_PRINT_REGISTER(iss, CLKSTAT);
46
47 dev_dbg(iss->dev, "-----------------------------------------------\n");
48 }
49
50 /*
51 * omap4iss_flush - Post pending L3 bus writes by doing a register readback
52 * @iss: OMAP4 ISS device
53 *
54 * In order to force posting of pending writes, we need to write and
55 * readback the same register, in this case the revision register.
56 *
57 * See this link for reference:
58 * https://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
59 */
omap4iss_flush(struct iss_device * iss)60 static void omap4iss_flush(struct iss_device *iss)
61 {
62 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION, 0);
63 iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
64 }
65
66 /*
67 * iss_isp_enable_interrupts - Enable ISS ISP interrupts.
68 * @iss: OMAP4 ISS device
69 */
omap4iss_isp_enable_interrupts(struct iss_device * iss)70 static void omap4iss_isp_enable_interrupts(struct iss_device *iss)
71 {
72 static const u32 isp_irq = ISP5_IRQ_OCP_ERR |
73 ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
74 ISP5_IRQ_RSZ_FIFO_OVF |
75 ISP5_IRQ_RSZ_INT_DMA |
76 ISP5_IRQ_ISIF_INT(0);
77
78 /* Enable ISP interrupts */
79 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0), isp_irq);
80 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_SET(0),
81 isp_irq);
82 }
83
84 /*
85 * iss_isp_disable_interrupts - Disable ISS interrupts.
86 * @iss: OMAP4 ISS device
87 */
omap4iss_isp_disable_interrupts(struct iss_device * iss)88 static void omap4iss_isp_disable_interrupts(struct iss_device *iss)
89 {
90 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQENABLE_CLR(0), ~0);
91 }
92
93 /*
94 * iss_enable_interrupts - Enable ISS interrupts.
95 * @iss: OMAP4 ISS device
96 */
iss_enable_interrupts(struct iss_device * iss)97 static void iss_enable_interrupts(struct iss_device *iss)
98 {
99 static const u32 hl_irq = ISS_HL_IRQ_CSIA | ISS_HL_IRQ_CSIB
100 | ISS_HL_IRQ_ISP(0);
101
102 /* Enable HL interrupts */
103 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), hl_irq);
104 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_SET(5), hl_irq);
105
106 if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
107 omap4iss_isp_enable_interrupts(iss);
108 }
109
110 /*
111 * iss_disable_interrupts - Disable ISS interrupts.
112 * @iss: OMAP4 ISS device
113 */
iss_disable_interrupts(struct iss_device * iss)114 static void iss_disable_interrupts(struct iss_device *iss)
115 {
116 if (iss->regs[OMAP4_ISS_MEM_ISP_SYS1])
117 omap4iss_isp_disable_interrupts(iss);
118
119 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQENABLE_CLR(5), ~0);
120 }
121
omap4iss_get_external_info(struct iss_pipeline * pipe,struct media_link * link)122 int omap4iss_get_external_info(struct iss_pipeline *pipe,
123 struct media_link *link)
124 {
125 struct iss_device *iss =
126 container_of(pipe, struct iss_video, pipe)->iss;
127 struct v4l2_subdev_format fmt;
128 struct v4l2_ctrl *ctrl;
129 int ret;
130
131 if (!pipe->external)
132 return 0;
133
134 if (pipe->external_rate)
135 return 0;
136
137 memset(&fmt, 0, sizeof(fmt));
138
139 fmt.pad = link->source->index;
140 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
141 ret = v4l2_subdev_call(media_entity_to_v4l2_subdev(link->sink->entity),
142 pad, get_fmt, NULL, &fmt);
143 if (ret < 0)
144 return -EPIPE;
145
146 pipe->external_bpp = omap4iss_video_format_info(fmt.format.code)->bpp;
147
148 ctrl = v4l2_ctrl_find(pipe->external->ctrl_handler,
149 V4L2_CID_PIXEL_RATE);
150 if (!ctrl) {
151 dev_warn(iss->dev, "no pixel rate control in subdev %s\n",
152 pipe->external->name);
153 return -EPIPE;
154 }
155
156 pipe->external_rate = v4l2_ctrl_g_ctrl_int64(ctrl);
157
158 return 0;
159 }
160
161 /*
162 * Configure the bridge. Valid inputs are
163 *
164 * IPIPEIF_INPUT_CSI2A: CSI2a receiver
165 * IPIPEIF_INPUT_CSI2B: CSI2b receiver
166 *
167 * The bridge and lane shifter are configured according to the selected input
168 * and the ISP platform data.
169 */
omap4iss_configure_bridge(struct iss_device * iss,enum ipipeif_input_entity input)170 void omap4iss_configure_bridge(struct iss_device *iss,
171 enum ipipeif_input_entity input)
172 {
173 u32 issctrl_val;
174 u32 isp5ctrl_val;
175
176 issctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL);
177 issctrl_val &= ~ISS_CTRL_INPUT_SEL_MASK;
178 issctrl_val &= ~ISS_CTRL_CLK_DIV_MASK;
179
180 isp5ctrl_val = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL);
181
182 switch (input) {
183 case IPIPEIF_INPUT_CSI2A:
184 issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2A;
185 break;
186
187 case IPIPEIF_INPUT_CSI2B:
188 issctrl_val |= ISS_CTRL_INPUT_SEL_CSI2B;
189 break;
190
191 default:
192 return;
193 }
194
195 issctrl_val |= ISS_CTRL_SYNC_DETECT_VS_RAISING;
196
197 isp5ctrl_val |= ISP5_CTRL_VD_PULSE_EXT | ISP5_CTRL_PSYNC_CLK_SEL |
198 ISP5_CTRL_SYNC_ENABLE;
199
200 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_CTRL, issctrl_val);
201 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_CTRL, isp5ctrl_val);
202 }
203
204 #ifdef ISS_ISR_DEBUG
iss_isr_dbg(struct iss_device * iss,u32 irqstatus)205 static void iss_isr_dbg(struct iss_device *iss, u32 irqstatus)
206 {
207 static const char * const name[] = {
208 "ISP_0",
209 "ISP_1",
210 "ISP_2",
211 "ISP_3",
212 "CSIA",
213 "CSIB",
214 "CCP2_0",
215 "CCP2_1",
216 "CCP2_2",
217 "CCP2_3",
218 "CBUFF",
219 "BTE",
220 "SIMCOP_0",
221 "SIMCOP_1",
222 "SIMCOP_2",
223 "SIMCOP_3",
224 "CCP2_8",
225 "HS_VS",
226 "18",
227 "19",
228 "20",
229 "21",
230 "22",
231 "23",
232 "24",
233 "25",
234 "26",
235 "27",
236 "28",
237 "29",
238 "30",
239 "31",
240 };
241 unsigned int i;
242
243 dev_dbg(iss->dev, "ISS IRQ: ");
244
245 for (i = 0; i < ARRAY_SIZE(name); i++) {
246 if ((1 << i) & irqstatus)
247 pr_cont("%s ", name[i]);
248 }
249 pr_cont("\n");
250 }
251
iss_isp_isr_dbg(struct iss_device * iss,u32 irqstatus)252 static void iss_isp_isr_dbg(struct iss_device *iss, u32 irqstatus)
253 {
254 static const char * const name[] = {
255 "ISIF_0",
256 "ISIF_1",
257 "ISIF_2",
258 "ISIF_3",
259 "IPIPEREQ",
260 "IPIPELAST_PIX",
261 "IPIPEDMA",
262 "IPIPEBSC",
263 "IPIPEHST",
264 "IPIPEIF",
265 "AEW",
266 "AF",
267 "H3A",
268 "RSZ_REG",
269 "RSZ_LAST_PIX",
270 "RSZ_DMA",
271 "RSZ_CYC_RZA",
272 "RSZ_CYC_RZB",
273 "RSZ_FIFO_OVF",
274 "RSZ_FIFO_IN_BLK_ERR",
275 "20",
276 "21",
277 "RSZ_EOF0",
278 "RSZ_EOF1",
279 "H3A_EOF",
280 "IPIPE_EOF",
281 "26",
282 "IPIPE_DPC_INI",
283 "IPIPE_DPC_RNEW0",
284 "IPIPE_DPC_RNEW1",
285 "30",
286 "OCP_ERR",
287 };
288 unsigned int i;
289
290 dev_dbg(iss->dev, "ISP IRQ: ");
291
292 for (i = 0; i < ARRAY_SIZE(name); i++) {
293 if ((1 << i) & irqstatus)
294 pr_cont("%s ", name[i]);
295 }
296 pr_cont("\n");
297 }
298 #endif
299
300 /*
301 * iss_isr - Interrupt Service Routine for ISS module.
302 * @irq: Not used currently.
303 * @_iss: Pointer to the OMAP4 ISS device
304 *
305 * Handles the corresponding callback if plugged in.
306 *
307 * Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
308 * IRQ wasn't handled.
309 */
iss_isr(int irq,void * _iss)310 static irqreturn_t iss_isr(int irq, void *_iss)
311 {
312 static const u32 ipipeif_events = ISP5_IRQ_IPIPEIF_IRQ |
313 ISP5_IRQ_ISIF_INT(0);
314 static const u32 resizer_events = ISP5_IRQ_RSZ_FIFO_IN_BLK_ERR |
315 ISP5_IRQ_RSZ_FIFO_OVF |
316 ISP5_IRQ_RSZ_INT_DMA;
317 struct iss_device *iss = _iss;
318 u32 irqstatus;
319
320 irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5));
321 iss_reg_write(iss, OMAP4_ISS_MEM_TOP, ISS_HL_IRQSTATUS(5), irqstatus);
322
323 if (irqstatus & ISS_HL_IRQ_CSIA)
324 omap4iss_csi2_isr(&iss->csi2a);
325
326 if (irqstatus & ISS_HL_IRQ_CSIB)
327 omap4iss_csi2_isr(&iss->csi2b);
328
329 if (irqstatus & ISS_HL_IRQ_ISP(0)) {
330 u32 isp_irqstatus = iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1,
331 ISP5_IRQSTATUS(0));
332 iss_reg_write(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_IRQSTATUS(0),
333 isp_irqstatus);
334
335 if (isp_irqstatus & ISP5_IRQ_OCP_ERR)
336 dev_dbg(iss->dev, "ISP5 OCP Error!\n");
337
338 if (isp_irqstatus & ipipeif_events) {
339 omap4iss_ipipeif_isr(&iss->ipipeif,
340 isp_irqstatus & ipipeif_events);
341 }
342
343 if (isp_irqstatus & resizer_events)
344 omap4iss_resizer_isr(&iss->resizer,
345 isp_irqstatus & resizer_events);
346
347 #ifdef ISS_ISR_DEBUG
348 iss_isp_isr_dbg(iss, isp_irqstatus);
349 #endif
350 }
351
352 omap4iss_flush(iss);
353
354 #ifdef ISS_ISR_DEBUG
355 iss_isr_dbg(iss, irqstatus);
356 #endif
357
358 return IRQ_HANDLED;
359 }
360
361 static const struct media_device_ops iss_media_ops = {
362 .link_notify = v4l2_pipeline_link_notify,
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 */
iss_pipeline_disable(struct iss_pipeline * pipe,struct media_entity * until)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 */
iss_pipeline_enable(struct iss_pipeline * pipe,enum iss_pipeline_stream_state mode)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 */
omap4iss_pipeline_set_stream(struct iss_pipeline * pipe,enum iss_pipeline_stream_state state)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 */
omap4iss_pipeline_cancel_stream(struct iss_pipeline * pipe)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 */
iss_pipeline_is_last(struct media_entity * me)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
iss_reset(struct iss_device * iss)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
iss_isp_reset(struct iss_device * iss)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 */
omap4iss_module_sync_idle(struct media_entity * me,wait_queue_head_t * wait,atomic_t * stopping)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 */
omap4iss_module_sync_is_stopping(wait_queue_head_t * wait,atomic_t * stopping)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
__iss_subclk_update(struct iss_device * iss)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
omap4iss_subclk_enable(struct iss_device * iss,enum iss_subclk_resource res)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
omap4iss_subclk_disable(struct iss_device * iss,enum iss_subclk_resource res)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
__iss_isp_subclk_update(struct iss_device * iss)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
omap4iss_isp_subclk_enable(struct iss_device * iss,enum iss_isp_subclk_resource res)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
omap4iss_isp_subclk_disable(struct iss_device * iss,enum iss_isp_subclk_resource res)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 */
iss_enable_clocks(struct iss_device * iss)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 */
iss_disable_clocks(struct iss_device * iss)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
iss_get_clocks(struct iss_device * iss)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 */
omap4iss_get(struct iss_device * iss)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 */
omap4iss_put(struct iss_device * iss)886 void omap4iss_put(struct iss_device *iss)
887 {
888 if (!iss)
889 return;
890
891 mutex_lock(&iss->iss_mutex);
892 WARN_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
iss_map_mem_resource(struct platform_device * pdev,struct iss_device * iss,enum iss_mem_resources res)907 static int iss_map_mem_resource(struct platform_device *pdev,
908 struct iss_device *iss,
909 enum iss_mem_resources res)
910 {
911 iss->regs[res] = devm_platform_ioremap_resource(pdev, res);
912
913 return PTR_ERR_OR_ZERO(iss->regs[res]);
914 }
915
iss_unregister_entities(struct iss_device * iss)916 static void iss_unregister_entities(struct iss_device *iss)
917 {
918 omap4iss_resizer_unregister_entities(&iss->resizer);
919 omap4iss_ipipe_unregister_entities(&iss->ipipe);
920 omap4iss_ipipeif_unregister_entities(&iss->ipipeif);
921 omap4iss_csi2_unregister_entities(&iss->csi2a);
922 omap4iss_csi2_unregister_entities(&iss->csi2b);
923
924 v4l2_device_unregister(&iss->v4l2_dev);
925 media_device_unregister(&iss->media_dev);
926 }
927
928 /*
929 * iss_register_subdev_group - Register a group of subdevices
930 * @iss: OMAP4 ISS device
931 * @board_info: I2C subdevs board information array
932 *
933 * Register all I2C subdevices in the board_info array. The array must be
934 * terminated by a NULL entry, and the first entry must be the sensor.
935 *
936 * Return a pointer to the sensor media entity if it has been successfully
937 * registered, or NULL otherwise.
938 */
939 static struct v4l2_subdev *
iss_register_subdev_group(struct iss_device * iss,struct iss_subdev_i2c_board_info * board_info)940 iss_register_subdev_group(struct iss_device *iss,
941 struct iss_subdev_i2c_board_info *board_info)
942 {
943 struct v4l2_subdev *sensor = NULL;
944 unsigned int first;
945
946 if (!board_info->board_info)
947 return NULL;
948
949 for (first = 1; board_info->board_info; ++board_info, first = 0) {
950 struct v4l2_subdev *subdev;
951 struct i2c_adapter *adapter;
952
953 adapter = i2c_get_adapter(board_info->i2c_adapter_id);
954 if (!adapter) {
955 dev_err(iss->dev,
956 "%s: Unable to get I2C adapter %d for device %s\n",
957 __func__, board_info->i2c_adapter_id,
958 board_info->board_info->type);
959 continue;
960 }
961
962 subdev = v4l2_i2c_new_subdev_board(&iss->v4l2_dev, adapter,
963 board_info->board_info, NULL);
964 if (!subdev) {
965 dev_err(iss->dev, "Unable to register subdev %s\n",
966 board_info->board_info->type);
967 continue;
968 }
969
970 if (first)
971 sensor = subdev;
972 }
973
974 return sensor;
975 }
976
iss_register_entities(struct iss_device * iss)977 static int iss_register_entities(struct iss_device *iss)
978 {
979 struct iss_platform_data *pdata = iss->pdata;
980 struct iss_v4l2_subdevs_group *subdevs;
981 int ret;
982
983 iss->media_dev.dev = iss->dev;
984 strscpy(iss->media_dev.model, "TI OMAP4 ISS",
985 sizeof(iss->media_dev.model));
986 iss->media_dev.hw_revision = iss->revision;
987 iss->media_dev.ops = &iss_media_ops;
988 ret = media_device_register(&iss->media_dev);
989 if (ret < 0) {
990 dev_err(iss->dev, "Media device registration failed (%d)\n",
991 ret);
992 return ret;
993 }
994
995 iss->v4l2_dev.mdev = &iss->media_dev;
996 ret = v4l2_device_register(iss->dev, &iss->v4l2_dev);
997 if (ret < 0) {
998 dev_err(iss->dev, "V4L2 device registration failed (%d)\n",
999 ret);
1000 goto done;
1001 }
1002
1003 /* Register internal entities */
1004 ret = omap4iss_csi2_register_entities(&iss->csi2a, &iss->v4l2_dev);
1005 if (ret < 0)
1006 goto done;
1007
1008 ret = omap4iss_csi2_register_entities(&iss->csi2b, &iss->v4l2_dev);
1009 if (ret < 0)
1010 goto done;
1011
1012 ret = omap4iss_ipipeif_register_entities(&iss->ipipeif, &iss->v4l2_dev);
1013 if (ret < 0)
1014 goto done;
1015
1016 ret = omap4iss_ipipe_register_entities(&iss->ipipe, &iss->v4l2_dev);
1017 if (ret < 0)
1018 goto done;
1019
1020 ret = omap4iss_resizer_register_entities(&iss->resizer, &iss->v4l2_dev);
1021 if (ret < 0)
1022 goto done;
1023
1024 /* Register external entities */
1025 for (subdevs = pdata->subdevs; subdevs && subdevs->subdevs; ++subdevs) {
1026 struct v4l2_subdev *sensor;
1027 struct media_entity *input;
1028 unsigned int flags;
1029 unsigned int pad;
1030
1031 sensor = iss_register_subdev_group(iss, subdevs->subdevs);
1032 if (!sensor)
1033 continue;
1034
1035 sensor->host_priv = subdevs;
1036
1037 /* Connect the sensor to the correct interface module.
1038 * CSI2a receiver through CSIPHY1, or
1039 * CSI2b receiver through CSIPHY2
1040 */
1041 switch (subdevs->interface) {
1042 case ISS_INTERFACE_CSI2A_PHY1:
1043 input = &iss->csi2a.subdev.entity;
1044 pad = CSI2_PAD_SINK;
1045 flags = MEDIA_LNK_FL_IMMUTABLE
1046 | MEDIA_LNK_FL_ENABLED;
1047 break;
1048
1049 case ISS_INTERFACE_CSI2B_PHY2:
1050 input = &iss->csi2b.subdev.entity;
1051 pad = CSI2_PAD_SINK;
1052 flags = MEDIA_LNK_FL_IMMUTABLE
1053 | MEDIA_LNK_FL_ENABLED;
1054 break;
1055
1056 default:
1057 dev_err(iss->dev, "invalid interface type %u\n",
1058 subdevs->interface);
1059 ret = -EINVAL;
1060 goto done;
1061 }
1062
1063 ret = media_create_pad_link(&sensor->entity, 0, input, pad,
1064 flags);
1065 if (ret < 0)
1066 goto done;
1067 }
1068
1069 ret = v4l2_device_register_subdev_nodes(&iss->v4l2_dev);
1070
1071 done:
1072 if (ret < 0)
1073 iss_unregister_entities(iss);
1074
1075 return ret;
1076 }
1077
1078 /*
1079 * iss_create_links() - Pads links creation for the subdevices
1080 * @iss : Pointer to ISS device
1081 *
1082 * return negative error code or zero on success
1083 */
iss_create_links(struct iss_device * iss)1084 static int iss_create_links(struct iss_device *iss)
1085 {
1086 int ret;
1087
1088 ret = omap4iss_csi2_create_links(iss);
1089 if (ret < 0) {
1090 dev_err(iss->dev, "CSI2 pads links creation failed\n");
1091 return ret;
1092 }
1093
1094 ret = omap4iss_ipipeif_create_links(iss);
1095 if (ret < 0) {
1096 dev_err(iss->dev, "ISP IPIPEIF pads links creation failed\n");
1097 return ret;
1098 }
1099
1100 ret = omap4iss_resizer_create_links(iss);
1101 if (ret < 0) {
1102 dev_err(iss->dev, "ISP RESIZER pads links creation failed\n");
1103 return ret;
1104 }
1105
1106 /* Connect the submodules. */
1107 ret = media_create_pad_link(
1108 &iss->csi2a.subdev.entity, CSI2_PAD_SOURCE,
1109 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
1110 if (ret < 0)
1111 return ret;
1112
1113 ret = media_create_pad_link(
1114 &iss->csi2b.subdev.entity, CSI2_PAD_SOURCE,
1115 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SINK, 0);
1116 if (ret < 0)
1117 return ret;
1118
1119 ret = media_create_pad_link(
1120 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
1121 &iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
1122 if (ret < 0)
1123 return ret;
1124
1125 ret = media_create_pad_link(
1126 &iss->ipipeif.subdev.entity, IPIPEIF_PAD_SOURCE_VP,
1127 &iss->ipipe.subdev.entity, IPIPE_PAD_SINK, 0);
1128 if (ret < 0)
1129 return ret;
1130
1131 ret = media_create_pad_link(
1132 &iss->ipipe.subdev.entity, IPIPE_PAD_SOURCE_VP,
1133 &iss->resizer.subdev.entity, RESIZER_PAD_SINK, 0);
1134 if (ret < 0)
1135 return ret;
1136
1137 return 0;
1138 };
1139
iss_cleanup_modules(struct iss_device * iss)1140 static void iss_cleanup_modules(struct iss_device *iss)
1141 {
1142 omap4iss_csi2_cleanup(iss);
1143 omap4iss_ipipeif_cleanup(iss);
1144 omap4iss_ipipe_cleanup(iss);
1145 omap4iss_resizer_cleanup(iss);
1146 }
1147
iss_initialize_modules(struct iss_device * iss)1148 static int iss_initialize_modules(struct iss_device *iss)
1149 {
1150 int ret;
1151
1152 ret = omap4iss_csiphy_init(iss);
1153 if (ret < 0) {
1154 dev_err(iss->dev, "CSI PHY initialization failed\n");
1155 goto error_csiphy;
1156 }
1157
1158 ret = omap4iss_csi2_init(iss);
1159 if (ret < 0) {
1160 dev_err(iss->dev, "CSI2 initialization failed\n");
1161 goto error_csi2;
1162 }
1163
1164 ret = omap4iss_ipipeif_init(iss);
1165 if (ret < 0) {
1166 dev_err(iss->dev, "ISP IPIPEIF initialization failed\n");
1167 goto error_ipipeif;
1168 }
1169
1170 ret = omap4iss_ipipe_init(iss);
1171 if (ret < 0) {
1172 dev_err(iss->dev, "ISP IPIPE initialization failed\n");
1173 goto error_ipipe;
1174 }
1175
1176 ret = omap4iss_resizer_init(iss);
1177 if (ret < 0) {
1178 dev_err(iss->dev, "ISP RESIZER initialization failed\n");
1179 goto error_resizer;
1180 }
1181
1182 return 0;
1183
1184 error_resizer:
1185 omap4iss_ipipe_cleanup(iss);
1186 error_ipipe:
1187 omap4iss_ipipeif_cleanup(iss);
1188 error_ipipeif:
1189 omap4iss_csi2_cleanup(iss);
1190 error_csi2:
1191 error_csiphy:
1192 return ret;
1193 }
1194
iss_probe(struct platform_device * pdev)1195 static int iss_probe(struct platform_device *pdev)
1196 {
1197 struct iss_platform_data *pdata = pdev->dev.platform_data;
1198 struct iss_device *iss;
1199 unsigned int i;
1200 int ret;
1201
1202 if (!pdata)
1203 return -EINVAL;
1204
1205 iss = devm_kzalloc(&pdev->dev, sizeof(*iss), GFP_KERNEL);
1206 if (!iss)
1207 return -ENOMEM;
1208
1209 mutex_init(&iss->iss_mutex);
1210
1211 iss->dev = &pdev->dev;
1212 iss->pdata = pdata;
1213
1214 iss->raw_dmamask = DMA_BIT_MASK(32);
1215 iss->dev->dma_mask = &iss->raw_dmamask;
1216 iss->dev->coherent_dma_mask = DMA_BIT_MASK(32);
1217
1218 platform_set_drvdata(pdev, iss);
1219
1220 /*
1221 * TODO: When implementing DT support switch to syscon regmap lookup by
1222 * phandle.
1223 */
1224 iss->syscon = syscon_regmap_lookup_by_compatible("syscon");
1225 if (IS_ERR(iss->syscon)) {
1226 ret = PTR_ERR(iss->syscon);
1227 goto error;
1228 }
1229
1230 /* Clocks */
1231 ret = iss_map_mem_resource(pdev, iss, OMAP4_ISS_MEM_TOP);
1232 if (ret < 0)
1233 goto error;
1234
1235 ret = iss_get_clocks(iss);
1236 if (ret < 0)
1237 goto error;
1238
1239 if (!omap4iss_get(iss)) {
1240 ret = -EINVAL;
1241 goto error;
1242 }
1243
1244 ret = iss_reset(iss);
1245 if (ret < 0)
1246 goto error_iss;
1247
1248 iss->revision = iss_reg_read(iss, OMAP4_ISS_MEM_TOP, ISS_HL_REVISION);
1249 dev_info(iss->dev, "Revision %08x found\n", iss->revision);
1250
1251 for (i = 1; i < OMAP4_ISS_MEM_LAST; i++) {
1252 ret = iss_map_mem_resource(pdev, iss, i);
1253 if (ret)
1254 goto error_iss;
1255 }
1256
1257 /* Configure BTE BW_LIMITER field to max recommended value (1 GB) */
1258 iss_reg_update(iss, OMAP4_ISS_MEM_BTE, BTE_CTRL,
1259 BTE_CTRL_BW_LIMITER_MASK,
1260 18 << BTE_CTRL_BW_LIMITER_SHIFT);
1261
1262 /* Perform ISP reset */
1263 ret = omap4iss_subclk_enable(iss, OMAP4_ISS_SUBCLK_ISP);
1264 if (ret < 0)
1265 goto error_iss;
1266
1267 ret = iss_isp_reset(iss);
1268 if (ret < 0)
1269 goto error_iss;
1270
1271 dev_info(iss->dev, "ISP Revision %08x found\n",
1272 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_REVISION));
1273
1274 /* Interrupt */
1275 ret = platform_get_irq(pdev, 0);
1276 if (ret <= 0) {
1277 ret = -ENODEV;
1278 goto error_iss;
1279 }
1280 iss->irq_num = ret;
1281
1282 if (devm_request_irq(iss->dev, iss->irq_num, iss_isr, IRQF_SHARED,
1283 "OMAP4 ISS", iss)) {
1284 dev_err(iss->dev, "Unable to request IRQ\n");
1285 ret = -EINVAL;
1286 goto error_iss;
1287 }
1288
1289 /* Entities */
1290 ret = iss_initialize_modules(iss);
1291 if (ret < 0)
1292 goto error_iss;
1293
1294 ret = iss_register_entities(iss);
1295 if (ret < 0)
1296 goto error_modules;
1297
1298 ret = media_entity_enum_init(&iss->crashed, &iss->media_dev);
1299 if (ret)
1300 goto error_entities;
1301
1302 ret = iss_create_links(iss);
1303 if (ret < 0)
1304 goto error_entities;
1305
1306 omap4iss_put(iss);
1307
1308 return 0;
1309
1310 error_entities:
1311 iss_unregister_entities(iss);
1312 media_entity_enum_cleanup(&iss->crashed);
1313 error_modules:
1314 iss_cleanup_modules(iss);
1315 error_iss:
1316 omap4iss_put(iss);
1317 error:
1318 mutex_destroy(&iss->iss_mutex);
1319
1320 return ret;
1321 }
1322
iss_remove(struct platform_device * pdev)1323 static int iss_remove(struct platform_device *pdev)
1324 {
1325 struct iss_device *iss = platform_get_drvdata(pdev);
1326
1327 iss_unregister_entities(iss);
1328 media_entity_enum_cleanup(&iss->crashed);
1329 iss_cleanup_modules(iss);
1330
1331 return 0;
1332 }
1333
1334 static const struct platform_device_id omap4iss_id_table[] = {
1335 { "omap4iss", 0 },
1336 { },
1337 };
1338 MODULE_DEVICE_TABLE(platform, omap4iss_id_table);
1339
1340 static struct platform_driver iss_driver = {
1341 .probe = iss_probe,
1342 .remove = iss_remove,
1343 .id_table = omap4iss_id_table,
1344 .driver = {
1345 .name = "omap4iss",
1346 },
1347 };
1348
1349 module_platform_driver(iss_driver);
1350
1351 MODULE_DESCRIPTION("TI OMAP4 ISS driver");
1352 MODULE_AUTHOR("Sergio Aguirre <sergio.a.aguirre@gmail.com>");
1353 MODULE_LICENSE("GPL");
1354 MODULE_VERSION(ISS_VIDEO_DRIVER_VERSION);
1355