2 * TI OMAP4 ISS V4L2 Driver
4 * Copyright (C) 2012, Texas Instruments
6 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
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.
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>
27 #include <media/v4l2-common.h>
28 #include <media/v4l2-device.h>
29 #include <media/v4l2-ctrls.h>
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))
38 static void iss_print_status(struct iss_device
*iss
)
40 dev_dbg(iss
->dev
, "-------------ISS HL Register dump-------------\n");
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
);
51 dev_dbg(iss
->dev
, "-----------------------------------------------\n");
55 * omap4iss_flush - Post pending L3 bus writes by doing a register readback
56 * @iss: OMAP4 ISS device
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.
61 * See this link for reference:
62 * http://www.mail-archive.com/linux-omap@vger.kernel.org/msg08149.html
64 void omap4iss_flush(struct iss_device
*iss
)
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
);
71 * iss_isp_enable_interrupts - Enable ISS ISP interrupts.
72 * @iss: OMAP4 ISS device
74 static void omap4iss_isp_enable_interrupts(struct iss_device
*iss
)
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
|
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),
89 * iss_isp_disable_interrupts - Disable ISS interrupts.
90 * @iss: OMAP4 ISS device
92 static void omap4iss_isp_disable_interrupts(struct iss_device
*iss
)
94 iss_reg_write(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_IRQENABLE_CLR(0), ~0);
98 * iss_enable_interrupts - Enable ISS interrupts.
99 * @iss: OMAP4 ISS device
101 static void iss_enable_interrupts(struct iss_device
*iss
)
103 static const u32 hl_irq
= ISS_HL_IRQ_CSIA
| ISS_HL_IRQ_CSIB
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
);
110 if (iss
->regs
[OMAP4_ISS_MEM_ISP_SYS1
])
111 omap4iss_isp_enable_interrupts(iss
);
115 * iss_disable_interrupts - Disable ISS interrupts.
116 * @iss: OMAP4 ISS device
118 static void iss_disable_interrupts(struct iss_device
*iss
)
120 if (iss
->regs
[OMAP4_ISS_MEM_ISP_SYS1
])
121 omap4iss_isp_disable_interrupts(iss
);
123 iss_reg_write(iss
, OMAP4_ISS_MEM_TOP
, ISS_HL_IRQENABLE_CLR(5), ~0);
126 int omap4iss_get_external_info(struct iss_pipeline
*pipe
,
127 struct media_link
*link
)
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
;
138 if (pipe
->external_rate
)
141 memset(&fmt
, 0, sizeof(fmt
));
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
);
150 pipe
->external_bpp
= omap4iss_video_format_info(fmt
.format
.code
)->bpp
;
152 ctrl
= v4l2_ctrl_find(pipe
->external
->ctrl_handler
,
153 V4L2_CID_PIXEL_RATE
);
155 dev_warn(iss
->dev
, "no pixel rate control in subdev %s\n",
156 pipe
->external
->name
);
160 pipe
->external_rate
= v4l2_ctrl_g_ctrl_int64(ctrl
);
166 * Configure the bridge. Valid inputs are
168 * IPIPEIF_INPUT_CSI2A: CSI2a receiver
169 * IPIPEIF_INPUT_CSI2B: CSI2b receiver
171 * The bridge and lane shifter are configured according to the selected input
172 * and the ISP platform data.
174 void omap4iss_configure_bridge(struct iss_device
*iss
,
175 enum ipipeif_input_entity input
)
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
;
184 isp5ctrl_val
= iss_reg_read(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_CTRL
);
187 case IPIPEIF_INPUT_CSI2A
:
188 issctrl_val
|= ISS_CTRL_INPUT_SEL_CSI2A
;
191 case IPIPEIF_INPUT_CSI2B
:
192 issctrl_val
|= ISS_CTRL_INPUT_SEL_CSI2B
;
199 issctrl_val
|= ISS_CTRL_SYNC_DETECT_VS_RAISING
;
201 isp5ctrl_val
|= ISP5_CTRL_VD_PULSE_EXT
| ISP5_CTRL_PSYNC_CLK_SEL
|
202 ISP5_CTRL_SYNC_ENABLE
;
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
);
209 static void iss_isr_dbg(struct iss_device
*iss
, u32 irqstatus
)
211 static const char * const name
[] = {
247 dev_dbg(iss
->dev
, "ISS IRQ: ");
249 for (i
= 0; i
< ARRAY_SIZE(name
); i
++) {
250 if ((1 << i
) & irqstatus
)
251 pr_cont("%s ", name
[i
]);
256 static void iss_isp_isr_dbg(struct iss_device
*iss
, u32 irqstatus
)
258 static const char * const name
[] = {
278 "RSZ_FIFO_IN_BLK_ERR",
294 dev_dbg(iss
->dev
, "ISP IRQ: ");
296 for (i
= 0; i
< ARRAY_SIZE(name
); i
++) {
297 if ((1 << i
) & irqstatus
)
298 pr_cont("%s ", name
[i
]);
305 * iss_isr - Interrupt Service Routine for ISS module.
306 * @irq: Not used currently.
307 * @_iss: Pointer to the OMAP4 ISS device
309 * Handles the corresponding callback if plugged in.
311 * Returns IRQ_HANDLED when IRQ was correctly handled, or IRQ_NONE when the
312 * IRQ wasn't handled.
314 static irqreturn_t
iss_isr(int irq
, void *_iss
)
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
;
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
);
327 if (irqstatus
& ISS_HL_IRQ_CSIA
)
328 omap4iss_csi2_isr(&iss
->csi2a
);
330 if (irqstatus
& ISS_HL_IRQ_CSIB
)
331 omap4iss_csi2_isr(&iss
->csi2b
);
333 if (irqstatus
& ISS_HL_IRQ_ISP(0)) {
334 u32 isp_irqstatus
= iss_reg_read(iss
, OMAP4_ISS_MEM_ISP_SYS1
,
336 iss_reg_write(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_IRQSTATUS(0),
339 if (isp_irqstatus
& ISP5_IRQ_OCP_ERR
)
340 dev_dbg(iss
->dev
, "ISP5 OCP Error!\n");
342 if (isp_irqstatus
& ipipeif_events
) {
343 omap4iss_ipipeif_isr(&iss
->ipipeif
,
344 isp_irqstatus
& ipipeif_events
);
347 if (isp_irqstatus
& resizer_events
)
348 omap4iss_resizer_isr(&iss
->resizer
,
349 isp_irqstatus
& resizer_events
);
352 iss_isp_isr_dbg(iss
, isp_irqstatus
);
359 iss_isr_dbg(iss
, irqstatus
);
365 /* -----------------------------------------------------------------------------
366 * Pipeline power management
368 * Entities must be powered up when part of a pipeline that contains at least
369 * one open video device node.
371 * To achieve this use the entity use_count field to track the number of users.
372 * For entities corresponding to video device nodes the use_count field stores
373 * the users count of the node. For entities corresponding to subdevs the
374 * use_count field stores the total number of users of all video device nodes
377 * The omap4iss_pipeline_pm_use() function must be called in the open() and
378 * close() handlers of video device nodes. It increments or decrements the use
379 * count of all subdev entities in the pipeline.
381 * To react to link management on powered pipelines, the link setup notification
382 * callback updates the use count of all entities in the source and sink sides
387 * iss_pipeline_pm_use_count - Count the number of users of a pipeline
388 * @entity: The entity
390 * Return the total number of users of all video device nodes in the pipeline.
392 static int iss_pipeline_pm_use_count(struct media_entity
*entity
)
394 struct media_entity_graph graph
;
397 media_entity_graph_walk_start(&graph
, entity
);
399 while ((entity
= media_entity_graph_walk_next(&graph
))) {
400 if (media_entity_type(entity
) == MEDIA_ENT_T_DEVNODE
)
401 use
+= entity
->use_count
;
408 * iss_pipeline_pm_power_one - Apply power change to an entity
409 * @entity: The entity
410 * @change: Use count change
412 * Change the entity use count by @change. If the entity is a subdev update its
413 * power state by calling the core::s_power operation when the use count goes
414 * from 0 to != 0 or from != 0 to 0.
416 * Return 0 on success or a negative error code on failure.
418 static int iss_pipeline_pm_power_one(struct media_entity
*entity
, int change
)
420 struct v4l2_subdev
*subdev
;
422 subdev
= media_entity_type(entity
) == MEDIA_ENT_T_V4L2_SUBDEV
423 ? media_entity_to_v4l2_subdev(entity
) : NULL
;
425 if (entity
->use_count
== 0 && change
> 0 && subdev
) {
428 ret
= v4l2_subdev_call(subdev
, core
, s_power
, 1);
429 if (ret
< 0 && ret
!= -ENOIOCTLCMD
)
433 entity
->use_count
+= change
;
434 WARN_ON(entity
->use_count
< 0);
436 if (entity
->use_count
== 0 && change
< 0 && subdev
)
437 v4l2_subdev_call(subdev
, core
, s_power
, 0);
443 * iss_pipeline_pm_power - Apply power change to all entities in a pipeline
444 * @entity: The entity
445 * @change: Use count change
447 * Walk the pipeline to update the use count and the power state of all non-node
450 * Return 0 on success or a negative error code on failure.
452 static int iss_pipeline_pm_power(struct media_entity
*entity
, int change
)
454 struct media_entity_graph graph
;
455 struct media_entity
*first
= entity
;
461 media_entity_graph_walk_start(&graph
, entity
);
463 while (!ret
&& (entity
= media_entity_graph_walk_next(&graph
)))
464 if (media_entity_type(entity
) != MEDIA_ENT_T_DEVNODE
)
465 ret
= iss_pipeline_pm_power_one(entity
, change
);
470 media_entity_graph_walk_start(&graph
, first
);
472 while ((first
= media_entity_graph_walk_next(&graph
)) &&
474 if (media_entity_type(first
) != MEDIA_ENT_T_DEVNODE
)
475 iss_pipeline_pm_power_one(first
, -change
);
481 * omap4iss_pipeline_pm_use - Update the use count of an entity
482 * @entity: The entity
483 * @use: Use (1) or stop using (0) the entity
485 * Update the use count of all entities in the pipeline and power entities on or
488 * Return 0 on success or a negative error code on failure. Powering entities
489 * off is assumed to never fail. No failure can occur when the use parameter is
492 int omap4iss_pipeline_pm_use(struct media_entity
*entity
, int use
)
494 int change
= use
? 1 : -1;
497 mutex_lock(&entity
->parent
->graph_mutex
);
499 /* Apply use count to node. */
500 entity
->use_count
+= change
;
501 WARN_ON(entity
->use_count
< 0);
503 /* Apply power change to connected non-nodes. */
504 ret
= iss_pipeline_pm_power(entity
, change
);
506 entity
->use_count
-= change
;
508 mutex_unlock(&entity
->parent
->graph_mutex
);
514 * iss_pipeline_link_notify - Link management notification callback
516 * @flags: New link flags that will be applied
518 * React to link management on powered pipelines by updating the use count of
519 * all entities in the source and sink sides of the link. Entities are powered
520 * on or off accordingly.
522 * Return 0 on success or a negative error code on failure. Powering entities
523 * off is assumed to never fail. This function will not fail for disconnection
526 static int iss_pipeline_link_notify(struct media_link
*link
, u32 flags
,
527 unsigned int notification
)
529 struct media_entity
*source
= link
->source
->entity
;
530 struct media_entity
*sink
= link
->sink
->entity
;
531 int source_use
= iss_pipeline_pm_use_count(source
);
532 int sink_use
= iss_pipeline_pm_use_count(sink
);
535 if (notification
== MEDIA_DEV_NOTIFY_POST_LINK_CH
&&
536 !(link
->flags
& MEDIA_LNK_FL_ENABLED
)) {
537 /* Powering off entities is assumed to never fail. */
538 iss_pipeline_pm_power(source
, -sink_use
);
539 iss_pipeline_pm_power(sink
, -source_use
);
543 if (notification
== MEDIA_DEV_NOTIFY_POST_LINK_CH
&&
544 (flags
& MEDIA_LNK_FL_ENABLED
)) {
545 ret
= iss_pipeline_pm_power(source
, sink_use
);
549 ret
= iss_pipeline_pm_power(sink
, source_use
);
551 iss_pipeline_pm_power(source
, -sink_use
);
559 /* -----------------------------------------------------------------------------
560 * Pipeline stream management
564 * iss_pipeline_disable - Disable streaming on a pipeline
565 * @pipe: ISS pipeline
566 * @until: entity at which to stop pipeline walk
568 * Walk the entities chain starting at the pipeline output video node and stop
569 * all modules in the chain. Wait synchronously for the modules to be stopped if
572 * If the until argument isn't NULL, stop the pipeline walk when reaching the
573 * until entity. This is used to disable a partially started pipeline due to a
574 * subdev start error.
576 static int iss_pipeline_disable(struct iss_pipeline
*pipe
,
577 struct media_entity
*until
)
579 struct iss_device
*iss
= pipe
->output
->iss
;
580 struct media_entity
*entity
;
581 struct media_pad
*pad
;
582 struct v4l2_subdev
*subdev
;
586 entity
= &pipe
->output
->video
.entity
;
588 pad
= &entity
->pads
[0];
589 if (!(pad
->flags
& MEDIA_PAD_FL_SINK
))
592 pad
= media_entity_remote_pad(pad
);
594 media_entity_type(pad
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
597 entity
= pad
->entity
;
601 subdev
= media_entity_to_v4l2_subdev(entity
);
602 ret
= v4l2_subdev_call(subdev
, video
, s_stream
, 0);
604 dev_dbg(iss
->dev
, "%s: module stop timeout.\n",
606 /* If the entity failed to stopped, assume it has
607 * crashed. Mark it as such, the ISS will be reset when
608 * applications will release it.
610 iss
->crashed
|= 1U << subdev
->entity
.id
;
611 failure
= -ETIMEDOUT
;
619 * iss_pipeline_enable - Enable streaming on a pipeline
620 * @pipe: ISS pipeline
621 * @mode: Stream mode (single shot or continuous)
623 * Walk the entities chain starting at the pipeline output video node and start
624 * all modules in the chain in the given mode.
626 * Return 0 if successful, or the return value of the failed video::s_stream
627 * operation otherwise.
629 static int iss_pipeline_enable(struct iss_pipeline
*pipe
,
630 enum iss_pipeline_stream_state mode
)
632 struct iss_device
*iss
= pipe
->output
->iss
;
633 struct media_entity
*entity
;
634 struct media_pad
*pad
;
635 struct v4l2_subdev
*subdev
;
639 /* If one of the entities in the pipeline has crashed it will not work
640 * properly. Refuse to start streaming in that case. This check must be
641 * performed before the loop below to avoid starting entities if the
642 * pipeline won't start anyway (those entities would then likely fail to
643 * stop, making the problem worse).
645 if (pipe
->entities
& iss
->crashed
)
648 spin_lock_irqsave(&pipe
->lock
, flags
);
649 pipe
->state
&= ~(ISS_PIPELINE_IDLE_INPUT
| ISS_PIPELINE_IDLE_OUTPUT
);
650 spin_unlock_irqrestore(&pipe
->lock
, flags
);
652 pipe
->do_propagation
= false;
654 entity
= &pipe
->output
->video
.entity
;
656 pad
= &entity
->pads
[0];
657 if (!(pad
->flags
& MEDIA_PAD_FL_SINK
))
660 pad
= media_entity_remote_pad(pad
);
662 media_entity_type(pad
->entity
) != MEDIA_ENT_T_V4L2_SUBDEV
)
665 entity
= pad
->entity
;
666 subdev
= media_entity_to_v4l2_subdev(entity
);
668 ret
= v4l2_subdev_call(subdev
, video
, s_stream
, mode
);
669 if (ret
< 0 && ret
!= -ENOIOCTLCMD
) {
670 iss_pipeline_disable(pipe
, entity
);
674 if (subdev
== &iss
->csi2a
.subdev
||
675 subdev
== &iss
->csi2b
.subdev
)
676 pipe
->do_propagation
= true;
679 iss_print_status(pipe
->output
->iss
);
684 * omap4iss_pipeline_set_stream - Enable/disable streaming on a pipeline
685 * @pipe: ISS pipeline
686 * @state: Stream state (stopped, single shot or continuous)
688 * Set the pipeline to the given stream state. Pipelines can be started in
689 * single-shot or continuous mode.
691 * Return 0 if successful, or the return value of the failed video::s_stream
692 * operation otherwise. The pipeline state is not updated when the operation
693 * fails, except when stopping the pipeline.
695 int omap4iss_pipeline_set_stream(struct iss_pipeline
*pipe
,
696 enum iss_pipeline_stream_state state
)
700 if (state
== ISS_PIPELINE_STREAM_STOPPED
)
701 ret
= iss_pipeline_disable(pipe
, NULL
);
703 ret
= iss_pipeline_enable(pipe
, state
);
705 if (ret
== 0 || state
== ISS_PIPELINE_STREAM_STOPPED
)
706 pipe
->stream_state
= state
;
712 * omap4iss_pipeline_cancel_stream - Cancel stream on a pipeline
713 * @pipe: ISS pipeline
715 * Cancelling a stream mark all buffers on all video nodes in the pipeline as
716 * erroneous and makes sure no new buffer can be queued. This function is called
717 * when a fatal error that prevents any further operation on the pipeline
720 void omap4iss_pipeline_cancel_stream(struct iss_pipeline
*pipe
)
723 omap4iss_video_cancel_stream(pipe
->input
);
725 omap4iss_video_cancel_stream(pipe
->output
);
729 * iss_pipeline_is_last - Verify if entity has an enabled link to the output
731 * @me: ISS module's media entity
733 * Returns 1 if the entity has an enabled link to the output video node or 0
734 * otherwise. It's true only while pipeline can have no more than one output
737 static int iss_pipeline_is_last(struct media_entity
*me
)
739 struct iss_pipeline
*pipe
;
740 struct media_pad
*pad
;
744 pipe
= to_iss_pipeline(me
);
745 if (pipe
->stream_state
== ISS_PIPELINE_STREAM_STOPPED
)
747 pad
= media_entity_remote_pad(&pipe
->output
->pad
);
748 return pad
->entity
== me
;
751 static int iss_reset(struct iss_device
*iss
)
753 unsigned int timeout
;
755 iss_reg_set(iss
, OMAP4_ISS_MEM_TOP
, ISS_HL_SYSCONFIG
,
756 ISS_HL_SYSCONFIG_SOFTRESET
);
758 timeout
= iss_poll_condition_timeout(
759 !(iss_reg_read(iss
, OMAP4_ISS_MEM_TOP
, ISS_HL_SYSCONFIG
) &
760 ISS_HL_SYSCONFIG_SOFTRESET
), 1000, 10, 100);
762 dev_err(iss
->dev
, "ISS reset timeout\n");
770 static int iss_isp_reset(struct iss_device
*iss
)
772 unsigned int timeout
;
774 /* Fist, ensure that the ISP is IDLE (no transactions happening) */
775 iss_reg_update(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_SYSCONFIG
,
776 ISP5_SYSCONFIG_STANDBYMODE_MASK
,
777 ISP5_SYSCONFIG_STANDBYMODE_SMART
);
779 iss_reg_set(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_CTRL
, ISP5_CTRL_MSTANDBY
);
781 timeout
= iss_poll_condition_timeout(
782 iss_reg_read(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_CTRL
) &
783 ISP5_CTRL_MSTANDBY_WAIT
, 1000000, 1000, 1500);
785 dev_err(iss
->dev
, "ISP5 standby timeout\n");
789 /* Now finally, do the reset */
790 iss_reg_set(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_SYSCONFIG
,
791 ISP5_SYSCONFIG_SOFTRESET
);
793 timeout
= iss_poll_condition_timeout(
794 !(iss_reg_read(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_SYSCONFIG
) &
795 ISP5_SYSCONFIG_SOFTRESET
), 1000000, 1000, 1500);
797 dev_err(iss
->dev
, "ISP5 reset timeout\n");
805 * iss_module_sync_idle - Helper to sync module with its idle state
806 * @me: ISS submodule's media entity
807 * @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
808 * @stopping: flag which tells module wants to stop
810 * This function checks if ISS submodule needs to wait for next interrupt. If
811 * yes, makes the caller to sleep while waiting for such event.
813 int omap4iss_module_sync_idle(struct media_entity
*me
, wait_queue_head_t
*wait
,
816 struct iss_pipeline
*pipe
= to_iss_pipeline(me
);
817 struct iss_video
*video
= pipe
->output
;
820 if (pipe
->stream_state
== ISS_PIPELINE_STREAM_STOPPED
||
821 (pipe
->stream_state
== ISS_PIPELINE_STREAM_SINGLESHOT
&&
822 !iss_pipeline_ready(pipe
)))
826 * atomic_set() doesn't include memory barrier on ARM platform for SMP
827 * scenario. We'll call it here to avoid race conditions.
829 atomic_set(stopping
, 1);
833 * If module is the last one, it's writing to memory. In this case,
834 * it's necessary to check if the module is already paused due to
835 * DMA queue underrun or if it has to wait for next interrupt to be
837 * If it isn't the last one, the function won't sleep but *stopping
838 * will still be set to warn next submodule caller's interrupt the
839 * module wants to be idle.
841 if (!iss_pipeline_is_last(me
))
844 spin_lock_irqsave(&video
->qlock
, flags
);
845 if (video
->dmaqueue_flags
& ISS_VIDEO_DMAQUEUE_UNDERRUN
) {
846 spin_unlock_irqrestore(&video
->qlock
, flags
);
847 atomic_set(stopping
, 0);
851 spin_unlock_irqrestore(&video
->qlock
, flags
);
852 if (!wait_event_timeout(*wait
, !atomic_read(stopping
),
853 msecs_to_jiffies(1000))) {
854 atomic_set(stopping
, 0);
863 * omap4iss_module_sync_is_stopped - Helper to verify if module was stopping
864 * @wait: ISS submodule's wait queue for streamoff/interrupt synchronization
865 * @stopping: flag which tells module wants to stop
867 * This function checks if ISS submodule was stopping. In case of yes, it
868 * notices the caller by setting stopping to 0 and waking up the wait queue.
869 * Returns 1 if it was stopping or 0 otherwise.
871 int omap4iss_module_sync_is_stopping(wait_queue_head_t
*wait
,
874 if (atomic_cmpxchg(stopping
, 1, 0)) {
882 /* --------------------------------------------------------------------------
886 #define ISS_CLKCTRL_MASK (ISS_CLKCTRL_CSI2_A |\
887 ISS_CLKCTRL_CSI2_B |\
890 static int __iss_subclk_update(struct iss_device
*iss
)
893 int ret
= 0, timeout
= 1000;
895 if (iss
->subclk_resources
& OMAP4_ISS_SUBCLK_CSI2_A
)
896 clk
|= ISS_CLKCTRL_CSI2_A
;
898 if (iss
->subclk_resources
& OMAP4_ISS_SUBCLK_CSI2_B
)
899 clk
|= ISS_CLKCTRL_CSI2_B
;
901 if (iss
->subclk_resources
& OMAP4_ISS_SUBCLK_ISP
)
902 clk
|= ISS_CLKCTRL_ISP
;
904 iss_reg_update(iss
, OMAP4_ISS_MEM_TOP
, ISS_CLKCTRL
,
905 ISS_CLKCTRL_MASK
, clk
);
907 /* Wait for HW assertion */
908 while (--timeout
> 0) {
910 if ((iss_reg_read(iss
, OMAP4_ISS_MEM_TOP
, ISS_CLKSTAT
) &
911 ISS_CLKCTRL_MASK
) == clk
)
921 int omap4iss_subclk_enable(struct iss_device
*iss
,
922 enum iss_subclk_resource res
)
924 iss
->subclk_resources
|= res
;
926 return __iss_subclk_update(iss
);
929 int omap4iss_subclk_disable(struct iss_device
*iss
,
930 enum iss_subclk_resource res
)
932 iss
->subclk_resources
&= ~res
;
934 return __iss_subclk_update(iss
);
937 #define ISS_ISP5_CLKCTRL_MASK (ISP5_CTRL_BL_CLK_ENABLE |\
938 ISP5_CTRL_ISIF_CLK_ENABLE |\
939 ISP5_CTRL_H3A_CLK_ENABLE |\
940 ISP5_CTRL_RSZ_CLK_ENABLE |\
941 ISP5_CTRL_IPIPE_CLK_ENABLE |\
942 ISP5_CTRL_IPIPEIF_CLK_ENABLE)
944 static void __iss_isp_subclk_update(struct iss_device
*iss
)
948 if (iss
->isp_subclk_resources
& OMAP4_ISS_ISP_SUBCLK_ISIF
)
949 clk
|= ISP5_CTRL_ISIF_CLK_ENABLE
;
951 if (iss
->isp_subclk_resources
& OMAP4_ISS_ISP_SUBCLK_H3A
)
952 clk
|= ISP5_CTRL_H3A_CLK_ENABLE
;
954 if (iss
->isp_subclk_resources
& OMAP4_ISS_ISP_SUBCLK_RSZ
)
955 clk
|= ISP5_CTRL_RSZ_CLK_ENABLE
;
957 if (iss
->isp_subclk_resources
& OMAP4_ISS_ISP_SUBCLK_IPIPE
)
958 clk
|= ISP5_CTRL_IPIPE_CLK_ENABLE
;
960 if (iss
->isp_subclk_resources
& OMAP4_ISS_ISP_SUBCLK_IPIPEIF
)
961 clk
|= ISP5_CTRL_IPIPEIF_CLK_ENABLE
;
964 clk
|= ISP5_CTRL_BL_CLK_ENABLE
;
966 iss_reg_update(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_CTRL
,
967 ISS_ISP5_CLKCTRL_MASK
, clk
);
970 void omap4iss_isp_subclk_enable(struct iss_device
*iss
,
971 enum iss_isp_subclk_resource res
)
973 iss
->isp_subclk_resources
|= res
;
975 __iss_isp_subclk_update(iss
);
978 void omap4iss_isp_subclk_disable(struct iss_device
*iss
,
979 enum iss_isp_subclk_resource res
)
981 iss
->isp_subclk_resources
&= ~res
;
983 __iss_isp_subclk_update(iss
);
987 * iss_enable_clocks - Enable ISS clocks
988 * @iss: OMAP4 ISS device
990 * Return 0 if successful, or clk_enable return value if any of tthem fails.
992 static int iss_enable_clocks(struct iss_device
*iss
)
996 ret
= clk_enable(iss
->iss_fck
);
998 dev_err(iss
->dev
, "clk_enable iss_fck failed\n");
1002 ret
= clk_enable(iss
->iss_ctrlclk
);
1004 dev_err(iss
->dev
, "clk_enable iss_ctrlclk failed\n");
1005 clk_disable(iss
->iss_fck
);
1013 * iss_disable_clocks - Disable ISS clocks
1014 * @iss: OMAP4 ISS device
1016 static void iss_disable_clocks(struct iss_device
*iss
)
1018 clk_disable(iss
->iss_ctrlclk
);
1019 clk_disable(iss
->iss_fck
);
1022 static int iss_get_clocks(struct iss_device
*iss
)
1024 iss
->iss_fck
= devm_clk_get(iss
->dev
, "iss_fck");
1025 if (IS_ERR(iss
->iss_fck
)) {
1026 dev_err(iss
->dev
, "Unable to get iss_fck clock info\n");
1027 return PTR_ERR(iss
->iss_fck
);
1030 iss
->iss_ctrlclk
= devm_clk_get(iss
->dev
, "iss_ctrlclk");
1031 if (IS_ERR(iss
->iss_ctrlclk
)) {
1032 dev_err(iss
->dev
, "Unable to get iss_ctrlclk clock info\n");
1033 return PTR_ERR(iss
->iss_ctrlclk
);
1040 * omap4iss_get - Acquire the ISS resource.
1042 * Initializes the clocks for the first acquire.
1044 * Increment the reference count on the ISS. If the first reference is taken,
1045 * enable clocks and power-up all submodules.
1047 * Return a pointer to the ISS device structure, or NULL if an error occurred.
1049 struct iss_device
*omap4iss_get(struct iss_device
*iss
)
1051 struct iss_device
*__iss
= iss
;
1056 mutex_lock(&iss
->iss_mutex
);
1057 if (iss
->ref_count
> 0)
1060 if (iss_enable_clocks(iss
) < 0) {
1065 iss_enable_interrupts(iss
);
1070 mutex_unlock(&iss
->iss_mutex
);
1076 * omap4iss_put - Release the ISS
1078 * Decrement the reference count on the ISS. If the last reference is released,
1079 * power-down all submodules, disable clocks and free temporary buffers.
1081 void omap4iss_put(struct iss_device
*iss
)
1086 mutex_lock(&iss
->iss_mutex
);
1087 BUG_ON(iss
->ref_count
== 0);
1088 if (--iss
->ref_count
== 0) {
1089 iss_disable_interrupts(iss
);
1090 /* Reset the ISS if an entity has failed to stop. This is the
1091 * only way to recover from such conditions, although it would
1092 * be worth investigating whether resetting the ISP only can't
1093 * fix the problem in some cases.
1097 iss_disable_clocks(iss
);
1099 mutex_unlock(&iss
->iss_mutex
);
1102 static int iss_map_mem_resource(struct platform_device
*pdev
,
1103 struct iss_device
*iss
,
1104 enum iss_mem_resources res
)
1106 struct resource
*mem
;
1108 mem
= platform_get_resource(pdev
, IORESOURCE_MEM
, res
);
1110 iss
->regs
[res
] = devm_ioremap_resource(iss
->dev
, mem
);
1112 return PTR_ERR_OR_ZERO(iss
->regs
[res
]);
1115 static void iss_unregister_entities(struct iss_device
*iss
)
1117 omap4iss_resizer_unregister_entities(&iss
->resizer
);
1118 omap4iss_ipipe_unregister_entities(&iss
->ipipe
);
1119 omap4iss_ipipeif_unregister_entities(&iss
->ipipeif
);
1120 omap4iss_csi2_unregister_entities(&iss
->csi2a
);
1121 omap4iss_csi2_unregister_entities(&iss
->csi2b
);
1123 v4l2_device_unregister(&iss
->v4l2_dev
);
1124 media_device_unregister(&iss
->media_dev
);
1128 * iss_register_subdev_group - Register a group of subdevices
1129 * @iss: OMAP4 ISS device
1130 * @board_info: I2C subdevs board information array
1132 * Register all I2C subdevices in the board_info array. The array must be
1133 * terminated by a NULL entry, and the first entry must be the sensor.
1135 * Return a pointer to the sensor media entity if it has been successfully
1136 * registered, or NULL otherwise.
1138 static struct v4l2_subdev
*
1139 iss_register_subdev_group(struct iss_device
*iss
,
1140 struct iss_subdev_i2c_board_info
*board_info
)
1142 struct v4l2_subdev
*sensor
= NULL
;
1145 if (!board_info
->board_info
)
1148 for (first
= 1; board_info
->board_info
; ++board_info
, first
= 0) {
1149 struct v4l2_subdev
*subdev
;
1150 struct i2c_adapter
*adapter
;
1152 adapter
= i2c_get_adapter(board_info
->i2c_adapter_id
);
1155 "%s: Unable to get I2C adapter %d for device %s\n",
1156 __func__
, board_info
->i2c_adapter_id
,
1157 board_info
->board_info
->type
);
1161 subdev
= v4l2_i2c_new_subdev_board(&iss
->v4l2_dev
, adapter
,
1162 board_info
->board_info
, NULL
);
1164 dev_err(iss
->dev
, "Unable to register subdev %s\n",
1165 board_info
->board_info
->type
);
1176 static int iss_register_entities(struct iss_device
*iss
)
1178 struct iss_platform_data
*pdata
= iss
->pdata
;
1179 struct iss_v4l2_subdevs_group
*subdevs
;
1182 iss
->media_dev
.dev
= iss
->dev
;
1183 strlcpy(iss
->media_dev
.model
, "TI OMAP4 ISS",
1184 sizeof(iss
->media_dev
.model
));
1185 iss
->media_dev
.hw_revision
= iss
->revision
;
1186 iss
->media_dev
.link_notify
= iss_pipeline_link_notify
;
1187 ret
= media_device_register(&iss
->media_dev
);
1189 dev_err(iss
->dev
, "Media device registration failed (%d)\n",
1194 iss
->v4l2_dev
.mdev
= &iss
->media_dev
;
1195 ret
= v4l2_device_register(iss
->dev
, &iss
->v4l2_dev
);
1197 dev_err(iss
->dev
, "V4L2 device registration failed (%d)\n",
1202 /* Register internal entities */
1203 ret
= omap4iss_csi2_register_entities(&iss
->csi2a
, &iss
->v4l2_dev
);
1207 ret
= omap4iss_csi2_register_entities(&iss
->csi2b
, &iss
->v4l2_dev
);
1211 ret
= omap4iss_ipipeif_register_entities(&iss
->ipipeif
, &iss
->v4l2_dev
);
1215 ret
= omap4iss_ipipe_register_entities(&iss
->ipipe
, &iss
->v4l2_dev
);
1219 ret
= omap4iss_resizer_register_entities(&iss
->resizer
, &iss
->v4l2_dev
);
1223 /* Register external entities */
1224 for (subdevs
= pdata
->subdevs
; subdevs
&& subdevs
->subdevs
; ++subdevs
) {
1225 struct v4l2_subdev
*sensor
;
1226 struct media_entity
*input
;
1230 sensor
= iss_register_subdev_group(iss
, subdevs
->subdevs
);
1234 sensor
->host_priv
= subdevs
;
1236 /* Connect the sensor to the correct interface module.
1237 * CSI2a receiver through CSIPHY1, or
1238 * CSI2b receiver through CSIPHY2
1240 switch (subdevs
->interface
) {
1241 case ISS_INTERFACE_CSI2A_PHY1
:
1242 input
= &iss
->csi2a
.subdev
.entity
;
1243 pad
= CSI2_PAD_SINK
;
1244 flags
= MEDIA_LNK_FL_IMMUTABLE
1245 | MEDIA_LNK_FL_ENABLED
;
1248 case ISS_INTERFACE_CSI2B_PHY2
:
1249 input
= &iss
->csi2b
.subdev
.entity
;
1250 pad
= CSI2_PAD_SINK
;
1251 flags
= MEDIA_LNK_FL_IMMUTABLE
1252 | MEDIA_LNK_FL_ENABLED
;
1256 dev_err(iss
->dev
, "invalid interface type %u\n",
1257 subdevs
->interface
);
1262 ret
= media_entity_create_link(&sensor
->entity
, 0, input
, pad
,
1268 ret
= v4l2_device_register_subdev_nodes(&iss
->v4l2_dev
);
1272 iss_unregister_entities(iss
);
1277 static void iss_cleanup_modules(struct iss_device
*iss
)
1279 omap4iss_csi2_cleanup(iss
);
1280 omap4iss_ipipeif_cleanup(iss
);
1281 omap4iss_ipipe_cleanup(iss
);
1282 omap4iss_resizer_cleanup(iss
);
1285 static int iss_initialize_modules(struct iss_device
*iss
)
1289 ret
= omap4iss_csiphy_init(iss
);
1291 dev_err(iss
->dev
, "CSI PHY initialization failed\n");
1295 ret
= omap4iss_csi2_init(iss
);
1297 dev_err(iss
->dev
, "CSI2 initialization failed\n");
1301 ret
= omap4iss_ipipeif_init(iss
);
1303 dev_err(iss
->dev
, "ISP IPIPEIF initialization failed\n");
1307 ret
= omap4iss_ipipe_init(iss
);
1309 dev_err(iss
->dev
, "ISP IPIPE initialization failed\n");
1313 ret
= omap4iss_resizer_init(iss
);
1315 dev_err(iss
->dev
, "ISP RESIZER initialization failed\n");
1319 /* Connect the submodules. */
1320 ret
= media_entity_create_link(
1321 &iss
->csi2a
.subdev
.entity
, CSI2_PAD_SOURCE
,
1322 &iss
->ipipeif
.subdev
.entity
, IPIPEIF_PAD_SINK
, 0);
1326 ret
= media_entity_create_link(
1327 &iss
->csi2b
.subdev
.entity
, CSI2_PAD_SOURCE
,
1328 &iss
->ipipeif
.subdev
.entity
, IPIPEIF_PAD_SINK
, 0);
1332 ret
= media_entity_create_link(
1333 &iss
->ipipeif
.subdev
.entity
, IPIPEIF_PAD_SOURCE_VP
,
1334 &iss
->resizer
.subdev
.entity
, RESIZER_PAD_SINK
, 0);
1338 ret
= media_entity_create_link(
1339 &iss
->ipipeif
.subdev
.entity
, IPIPEIF_PAD_SOURCE_VP
,
1340 &iss
->ipipe
.subdev
.entity
, IPIPE_PAD_SINK
, 0);
1344 ret
= media_entity_create_link(
1345 &iss
->ipipe
.subdev
.entity
, IPIPE_PAD_SOURCE_VP
,
1346 &iss
->resizer
.subdev
.entity
, RESIZER_PAD_SINK
, 0);
1353 omap4iss_resizer_cleanup(iss
);
1355 omap4iss_ipipe_cleanup(iss
);
1357 omap4iss_ipipeif_cleanup(iss
);
1359 omap4iss_csi2_cleanup(iss
);
1365 static int iss_probe(struct platform_device
*pdev
)
1367 struct iss_platform_data
*pdata
= pdev
->dev
.platform_data
;
1368 struct iss_device
*iss
;
1375 iss
= devm_kzalloc(&pdev
->dev
, sizeof(*iss
), GFP_KERNEL
);
1379 mutex_init(&iss
->iss_mutex
);
1381 iss
->dev
= &pdev
->dev
;
1384 iss
->raw_dmamask
= DMA_BIT_MASK(32);
1385 iss
->dev
->dma_mask
= &iss
->raw_dmamask
;
1386 iss
->dev
->coherent_dma_mask
= DMA_BIT_MASK(32);
1388 platform_set_drvdata(pdev
, iss
);
1391 * TODO: When implementing DT support switch to syscon regmap lookup by
1394 iss
->syscon
= syscon_regmap_lookup_by_compatible("syscon");
1395 if (IS_ERR(iss
->syscon
)) {
1396 ret
= PTR_ERR(iss
->syscon
);
1401 ret
= iss_map_mem_resource(pdev
, iss
, OMAP4_ISS_MEM_TOP
);
1405 ret
= iss_get_clocks(iss
);
1409 if (!omap4iss_get(iss
))
1412 ret
= iss_reset(iss
);
1416 iss
->revision
= iss_reg_read(iss
, OMAP4_ISS_MEM_TOP
, ISS_HL_REVISION
);
1417 dev_info(iss
->dev
, "Revision %08x found\n", iss
->revision
);
1419 for (i
= 1; i
< OMAP4_ISS_MEM_LAST
; i
++) {
1420 ret
= iss_map_mem_resource(pdev
, iss
, i
);
1425 /* Configure BTE BW_LIMITER field to max recommended value (1 GB) */
1426 iss_reg_update(iss
, OMAP4_ISS_MEM_BTE
, BTE_CTRL
,
1427 BTE_CTRL_BW_LIMITER_MASK
,
1428 18 << BTE_CTRL_BW_LIMITER_SHIFT
);
1430 /* Perform ISP reset */
1431 ret
= omap4iss_subclk_enable(iss
, OMAP4_ISS_SUBCLK_ISP
);
1435 ret
= iss_isp_reset(iss
);
1439 dev_info(iss
->dev
, "ISP Revision %08x found\n",
1440 iss_reg_read(iss
, OMAP4_ISS_MEM_ISP_SYS1
, ISP5_REVISION
));
1443 ret
= platform_get_irq(pdev
, 0);
1445 dev_err(iss
->dev
, "No IRQ resource\n");
1451 if (devm_request_irq(iss
->dev
, iss
->irq_num
, iss_isr
, IRQF_SHARED
,
1452 "OMAP4 ISS", iss
)) {
1453 dev_err(iss
->dev
, "Unable to request IRQ\n");
1459 ret
= iss_initialize_modules(iss
);
1463 ret
= iss_register_entities(iss
);
1472 iss_cleanup_modules(iss
);
1476 platform_set_drvdata(pdev
, NULL
);
1478 mutex_destroy(&iss
->iss_mutex
);
1483 static int iss_remove(struct platform_device
*pdev
)
1485 struct iss_device
*iss
= platform_get_drvdata(pdev
);
1487 iss_unregister_entities(iss
);
1488 iss_cleanup_modules(iss
);
1493 static const struct platform_device_id omap4iss_id_table
[] = {
1497 MODULE_DEVICE_TABLE(platform
, omap4iss_id_table
);
1499 static struct platform_driver iss_driver
= {
1501 .remove
= iss_remove
,
1502 .id_table
= omap4iss_id_table
,
1508 module_platform_driver(iss_driver
);
1510 MODULE_DESCRIPTION("TI OMAP4 ISS driver");
1511 MODULE_AUTHOR("Sergio Aguirre <sergio.a.aguirre@gmail.com>");
1512 MODULE_LICENSE("GPL");
1513 MODULE_VERSION(ISS_VIDEO_DRIVER_VERSION
);