2 * V4L2 Driver for i.MXL/i.MXL camera (CSI) host
4 * Copyright (C) 2008, Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
5 * Copyright (C) 2009, Darius Augulis <augulis.darius@gmail.com>
7 * Based on PXA SoC camera driver
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/clk.h>
17 #include <linux/delay.h>
18 #include <linux/device.h>
19 #include <linux/dma-mapping.h>
20 #include <linux/errno.h>
22 #include <linux/init.h>
23 #include <linux/interrupt.h>
25 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/moduleparam.h>
29 #include <linux/mutex.h>
30 #include <linux/platform_device.h>
31 #include <linux/sched.h>
32 #include <linux/slab.h>
33 #include <linux/time.h>
34 #include <linux/videodev2.h>
36 #include <media/soc_camera.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-dev.h>
39 #include <media/videobuf-dma-contig.h>
40 #include <media/soc_mediabus.h>
44 #include <mach/dma-mx1-mx2.h>
45 #include <mach/hardware.h>
46 #include <mach/irqs.h>
47 #include <mach/mx1_camera.h>
52 #define CSICR1 0x00 /* CSI Control Register 1 */
53 #define CSISR 0x08 /* CSI Status Register */
54 #define CSIRXR 0x10 /* CSI RxFIFO Register */
56 #define CSICR1_RXFF_LEVEL(x) (((x) & 0x3) << 19)
57 #define CSICR1_SOF_POL (1 << 17)
58 #define CSICR1_SOF_INTEN (1 << 16)
59 #define CSICR1_MCLKDIV(x) (((x) & 0xf) << 12)
60 #define CSICR1_MCLKEN (1 << 9)
61 #define CSICR1_FCC (1 << 8)
62 #define CSICR1_BIG_ENDIAN (1 << 7)
63 #define CSICR1_CLR_RXFIFO (1 << 5)
64 #define CSICR1_GCLK_MODE (1 << 4)
65 #define CSICR1_DATA_POL (1 << 2)
66 #define CSICR1_REDGE (1 << 1)
67 #define CSICR1_EN (1 << 0)
69 #define CSISR_SFF_OR_INT (1 << 25)
70 #define CSISR_RFF_OR_INT (1 << 24)
71 #define CSISR_STATFF_INT (1 << 21)
72 #define CSISR_RXFF_INT (1 << 18)
73 #define CSISR_SOF_INT (1 << 16)
74 #define CSISR_DRDY (1 << 0)
76 #define DRIVER_VERSION "0.0.2"
77 #define DRIVER_NAME "mx1-camera"
79 #define CSI_IRQ_MASK (CSISR_SFF_OR_INT | CSISR_RFF_OR_INT | \
80 CSISR_STATFF_INT | CSISR_RXFF_INT | CSISR_SOF_INT)
82 #define CSI_BUS_FLAGS (V4L2_MBUS_MASTER | V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
83 V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW | \
84 V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_PCLK_SAMPLE_FALLING | \
85 V4L2_MBUS_DATA_ACTIVE_HIGH | V4L2_MBUS_DATA_ACTIVE_LOW)
87 #define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */
93 /* buffer for one video frame */
95 /* common v4l buffer stuff -- must be first */
96 struct videobuf_buffer vb
;
97 enum v4l2_mbus_pixelcode code
;
102 * i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor
103 * Interface. If anyone ever builds hardware to enable more than
104 * one camera, they will have to modify this driver too
106 struct mx1_camera_dev
{
107 struct soc_camera_host soc_host
;
108 struct soc_camera_device
*icd
;
109 struct mx1_camera_pdata
*pdata
;
110 struct mx1_buffer
*active
;
111 struct resource
*res
;
113 struct list_head capture
;
124 * Videobuf operations
126 static int mx1_videobuf_setup(struct videobuf_queue
*vq
, unsigned int *count
,
129 struct soc_camera_device
*icd
= vq
->priv_data
;
131 *size
= icd
->sizeimage
;
136 if (*size
* *count
> MAX_VIDEO_MEM
* 1024 * 1024)
137 *count
= (MAX_VIDEO_MEM
* 1024 * 1024) / *size
;
139 dev_dbg(icd
->parent
, "count=%d, size=%d\n", *count
, *size
);
144 static void free_buffer(struct videobuf_queue
*vq
, struct mx1_buffer
*buf
)
146 struct soc_camera_device
*icd
= vq
->priv_data
;
147 struct videobuf_buffer
*vb
= &buf
->vb
;
149 BUG_ON(in_interrupt());
151 dev_dbg(icd
->parent
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
152 vb
, vb
->baddr
, vb
->bsize
);
155 * This waits until this buffer is out of danger, i.e., until it is no
156 * longer in STATE_QUEUED or STATE_ACTIVE
158 videobuf_waiton(vq
, vb
, 0, 0);
159 videobuf_dma_contig_free(vq
, vb
);
161 vb
->state
= VIDEOBUF_NEEDS_INIT
;
164 static int mx1_videobuf_prepare(struct videobuf_queue
*vq
,
165 struct videobuf_buffer
*vb
, enum v4l2_field field
)
167 struct soc_camera_device
*icd
= vq
->priv_data
;
168 struct mx1_buffer
*buf
= container_of(vb
, struct mx1_buffer
, vb
);
171 dev_dbg(icd
->parent
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
172 vb
, vb
->baddr
, vb
->bsize
);
174 /* Added list head initialization on alloc */
175 WARN_ON(!list_empty(&vb
->queue
));
177 BUG_ON(NULL
== icd
->current_fmt
);
180 * I think, in buf_prepare you only have to protect global data,
181 * the actual buffer is yours
185 if (buf
->code
!= icd
->current_fmt
->code
||
186 vb
->width
!= icd
->user_width
||
187 vb
->height
!= icd
->user_height
||
188 vb
->field
!= field
) {
189 buf
->code
= icd
->current_fmt
->code
;
190 vb
->width
= icd
->user_width
;
191 vb
->height
= icd
->user_height
;
193 vb
->state
= VIDEOBUF_NEEDS_INIT
;
196 vb
->size
= icd
->sizeimage
;
197 if (0 != vb
->baddr
&& vb
->bsize
< vb
->size
) {
202 if (vb
->state
== VIDEOBUF_NEEDS_INIT
) {
203 ret
= videobuf_iolock(vq
, vb
, NULL
);
207 vb
->state
= VIDEOBUF_PREPARED
;
215 free_buffer(vq
, buf
);
221 static int mx1_camera_setup_dma(struct mx1_camera_dev
*pcdev
)
223 struct videobuf_buffer
*vbuf
= &pcdev
->active
->vb
;
224 struct device
*dev
= pcdev
->icd
->parent
;
227 if (unlikely(!pcdev
->active
)) {
228 dev_err(dev
, "DMA End IRQ with no active buffer\n");
232 /* setup sg list for future DMA */
233 ret
= imx_dma_setup_single(pcdev
->dma_chan
,
234 videobuf_to_dma_contig(vbuf
),
235 vbuf
->size
, pcdev
->res
->start
+
236 CSIRXR
, DMA_MODE_READ
);
238 dev_err(dev
, "Failed to setup DMA sg list\n");
243 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
244 static void mx1_videobuf_queue(struct videobuf_queue
*vq
,
245 struct videobuf_buffer
*vb
)
247 struct soc_camera_device
*icd
= vq
->priv_data
;
248 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
249 struct mx1_camera_dev
*pcdev
= ici
->priv
;
250 struct mx1_buffer
*buf
= container_of(vb
, struct mx1_buffer
, vb
);
252 dev_dbg(icd
->parent
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
253 vb
, vb
->baddr
, vb
->bsize
);
255 list_add_tail(&vb
->queue
, &pcdev
->capture
);
257 vb
->state
= VIDEOBUF_ACTIVE
;
259 if (!pcdev
->active
) {
262 /* setup sg list for future DMA */
263 if (!mx1_camera_setup_dma(pcdev
)) {
266 temp
= __raw_readl(pcdev
->base
+ CSICR1
) |
268 __raw_writel(temp
, pcdev
->base
+ CSICR1
);
273 static void mx1_videobuf_release(struct videobuf_queue
*vq
,
274 struct videobuf_buffer
*vb
)
276 struct mx1_buffer
*buf
= container_of(vb
, struct mx1_buffer
, vb
);
278 struct soc_camera_device
*icd
= vq
->priv_data
;
279 struct device
*dev
= icd
->parent
;
281 dev_dbg(dev
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
282 vb
, vb
->baddr
, vb
->bsize
);
285 case VIDEOBUF_ACTIVE
:
286 dev_dbg(dev
, "%s (active)\n", __func__
);
288 case VIDEOBUF_QUEUED
:
289 dev_dbg(dev
, "%s (queued)\n", __func__
);
291 case VIDEOBUF_PREPARED
:
292 dev_dbg(dev
, "%s (prepared)\n", __func__
);
295 dev_dbg(dev
, "%s (unknown)\n", __func__
);
300 free_buffer(vq
, buf
);
303 static void mx1_camera_wakeup(struct mx1_camera_dev
*pcdev
,
304 struct videobuf_buffer
*vb
,
305 struct mx1_buffer
*buf
)
307 /* _init is used to debug races, see comment in mx1_camera_reqbufs() */
308 list_del_init(&vb
->queue
);
309 vb
->state
= VIDEOBUF_DONE
;
310 do_gettimeofday(&vb
->ts
);
314 if (list_empty(&pcdev
->capture
)) {
315 pcdev
->active
= NULL
;
319 pcdev
->active
= list_entry(pcdev
->capture
.next
,
320 struct mx1_buffer
, vb
.queue
);
322 /* setup sg list for future DMA */
323 if (likely(!mx1_camera_setup_dma(pcdev
))) {
327 temp
= __raw_readl(pcdev
->base
+ CSICR1
) | CSICR1_SOF_INTEN
;
328 __raw_writel(temp
, pcdev
->base
+ CSICR1
);
332 static void mx1_camera_dma_irq(int channel
, void *data
)
334 struct mx1_camera_dev
*pcdev
= data
;
335 struct device
*dev
= pcdev
->icd
->parent
;
336 struct mx1_buffer
*buf
;
337 struct videobuf_buffer
*vb
;
340 spin_lock_irqsave(&pcdev
->lock
, flags
);
342 imx_dma_disable(channel
);
344 if (unlikely(!pcdev
->active
)) {
345 dev_err(dev
, "DMA End IRQ with no active buffer\n");
349 vb
= &pcdev
->active
->vb
;
350 buf
= container_of(vb
, struct mx1_buffer
, vb
);
351 WARN_ON(buf
->inwork
|| list_empty(&vb
->queue
));
352 dev_dbg(dev
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
353 vb
, vb
->baddr
, vb
->bsize
);
355 mx1_camera_wakeup(pcdev
, vb
, buf
);
357 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
360 static struct videobuf_queue_ops mx1_videobuf_ops
= {
361 .buf_setup
= mx1_videobuf_setup
,
362 .buf_prepare
= mx1_videobuf_prepare
,
363 .buf_queue
= mx1_videobuf_queue
,
364 .buf_release
= mx1_videobuf_release
,
367 static void mx1_camera_init_videobuf(struct videobuf_queue
*q
,
368 struct soc_camera_device
*icd
)
370 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
371 struct mx1_camera_dev
*pcdev
= ici
->priv
;
373 videobuf_queue_dma_contig_init(q
, &mx1_videobuf_ops
, icd
->parent
,
374 &pcdev
->lock
, V4L2_BUF_TYPE_VIDEO_CAPTURE
,
376 sizeof(struct mx1_buffer
), icd
, &icd
->video_lock
);
379 static int mclk_get_divisor(struct mx1_camera_dev
*pcdev
)
381 unsigned int mclk
= pcdev
->mclk
;
383 unsigned long lcdclk
;
385 lcdclk
= clk_get_rate(pcdev
->clk
);
388 * We verify platform_mclk_10khz != 0, so if anyone breaks it, here
389 * they get a nice Oops
391 div
= (lcdclk
+ 2 * mclk
- 1) / (2 * mclk
) - 1;
393 dev_dbg(pcdev
->icd
->parent
,
394 "System clock %lukHz, target freq %dkHz, divisor %lu\n",
395 lcdclk
/ 1000, mclk
/ 1000, div
);
400 static void mx1_camera_activate(struct mx1_camera_dev
*pcdev
)
402 unsigned int csicr1
= CSICR1_EN
;
404 dev_dbg(pcdev
->icd
->parent
, "Activate device\n");
406 clk_enable(pcdev
->clk
);
408 /* enable CSI before doing anything else */
409 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
411 csicr1
|= CSICR1_MCLKEN
| CSICR1_FCC
| CSICR1_GCLK_MODE
;
412 csicr1
|= CSICR1_MCLKDIV(mclk_get_divisor(pcdev
));
413 csicr1
|= CSICR1_RXFF_LEVEL(2); /* 16 words */
415 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
418 static void mx1_camera_deactivate(struct mx1_camera_dev
*pcdev
)
420 dev_dbg(pcdev
->icd
->parent
, "Deactivate device\n");
422 /* Disable all CSI interface */
423 __raw_writel(0x00, pcdev
->base
+ CSICR1
);
425 clk_disable(pcdev
->clk
);
429 * The following two functions absolutely depend on the fact, that
430 * there can be only one camera on i.MX1/i.MXL camera sensor interface
432 static int mx1_camera_add_device(struct soc_camera_device
*icd
)
434 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
435 struct mx1_camera_dev
*pcdev
= ici
->priv
;
440 dev_info(icd
->parent
, "MX1 Camera driver attached to camera %d\n",
443 mx1_camera_activate(pcdev
);
450 static void mx1_camera_remove_device(struct soc_camera_device
*icd
)
452 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
453 struct mx1_camera_dev
*pcdev
= ici
->priv
;
456 BUG_ON(icd
!= pcdev
->icd
);
458 /* disable interrupts */
459 csicr1
= __raw_readl(pcdev
->base
+ CSICR1
) & ~CSI_IRQ_MASK
;
460 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
462 /* Stop DMA engine */
463 imx_dma_disable(pcdev
->dma_chan
);
465 dev_info(icd
->parent
, "MX1 Camera driver detached from camera %d\n",
468 mx1_camera_deactivate(pcdev
);
473 static int mx1_camera_set_crop(struct soc_camera_device
*icd
,
476 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
478 return v4l2_subdev_call(sd
, video
, s_crop
, a
);
481 static int mx1_camera_set_bus_param(struct soc_camera_device
*icd
)
483 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
484 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
485 struct mx1_camera_dev
*pcdev
= ici
->priv
;
486 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
487 unsigned long common_flags
;
491 /* MX1 supports only 8bit buswidth */
492 ret
= v4l2_subdev_call(sd
, video
, g_mbus_config
, &cfg
);
494 common_flags
= soc_mbus_config_compatible(&cfg
, CSI_BUS_FLAGS
);
496 dev_warn(icd
->parent
,
497 "Flags incompatible: camera 0x%x, host 0x%x\n",
498 cfg
.flags
, CSI_BUS_FLAGS
);
501 } else if (ret
!= -ENOIOCTLCMD
) {
504 common_flags
= CSI_BUS_FLAGS
;
507 /* Make choises, based on platform choice */
508 if ((common_flags
& V4L2_MBUS_VSYNC_ACTIVE_HIGH
) &&
509 (common_flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
)) {
511 pcdev
->pdata
->flags
& MX1_CAMERA_VSYNC_HIGH
)
512 common_flags
&= ~V4L2_MBUS_VSYNC_ACTIVE_LOW
;
514 common_flags
&= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH
;
517 if ((common_flags
& V4L2_MBUS_PCLK_SAMPLE_RISING
) &&
518 (common_flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)) {
520 pcdev
->pdata
->flags
& MX1_CAMERA_PCLK_RISING
)
521 common_flags
&= ~V4L2_MBUS_PCLK_SAMPLE_FALLING
;
523 common_flags
&= ~V4L2_MBUS_PCLK_SAMPLE_RISING
;
526 if ((common_flags
& V4L2_MBUS_DATA_ACTIVE_HIGH
) &&
527 (common_flags
& V4L2_MBUS_DATA_ACTIVE_LOW
)) {
529 pcdev
->pdata
->flags
& MX1_CAMERA_DATA_HIGH
)
530 common_flags
&= ~V4L2_MBUS_DATA_ACTIVE_LOW
;
532 common_flags
&= ~V4L2_MBUS_DATA_ACTIVE_HIGH
;
535 cfg
.flags
= common_flags
;
536 ret
= v4l2_subdev_call(sd
, video
, s_mbus_config
, &cfg
);
537 if (ret
< 0 && ret
!= -ENOIOCTLCMD
) {
538 dev_dbg(icd
->parent
, "camera s_mbus_config(0x%lx) returned %d\n",
543 csicr1
= __raw_readl(pcdev
->base
+ CSICR1
);
545 if (common_flags
& V4L2_MBUS_PCLK_SAMPLE_RISING
)
546 csicr1
|= CSICR1_REDGE
;
547 if (common_flags
& V4L2_MBUS_VSYNC_ACTIVE_HIGH
)
548 csicr1
|= CSICR1_SOF_POL
;
549 if (common_flags
& V4L2_MBUS_DATA_ACTIVE_LOW
)
550 csicr1
|= CSICR1_DATA_POL
;
552 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
557 static int mx1_camera_set_fmt(struct soc_camera_device
*icd
,
558 struct v4l2_format
*f
)
560 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
561 const struct soc_camera_format_xlate
*xlate
;
562 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
563 struct v4l2_mbus_framefmt mf
;
566 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
568 dev_warn(icd
->parent
, "Format %x not found\n",
573 buswidth
= xlate
->host_fmt
->bits_per_sample
;
575 dev_warn(icd
->parent
,
576 "bits-per-sample %d for format %x unsupported\n",
577 buswidth
, pix
->pixelformat
);
581 mf
.width
= pix
->width
;
582 mf
.height
= pix
->height
;
583 mf
.field
= pix
->field
;
584 mf
.colorspace
= pix
->colorspace
;
585 mf
.code
= xlate
->code
;
587 ret
= v4l2_subdev_call(sd
, video
, s_mbus_fmt
, &mf
);
591 if (mf
.code
!= xlate
->code
)
594 pix
->width
= mf
.width
;
595 pix
->height
= mf
.height
;
596 pix
->field
= mf
.field
;
597 pix
->colorspace
= mf
.colorspace
;
598 icd
->current_fmt
= xlate
;
603 static int mx1_camera_try_fmt(struct soc_camera_device
*icd
,
604 struct v4l2_format
*f
)
606 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
607 const struct soc_camera_format_xlate
*xlate
;
608 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
609 struct v4l2_mbus_framefmt mf
;
611 /* TODO: limit to mx1 hardware capabilities */
613 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
615 dev_warn(icd
->parent
, "Format %x not found\n",
620 mf
.width
= pix
->width
;
621 mf
.height
= pix
->height
;
622 mf
.field
= pix
->field
;
623 mf
.colorspace
= pix
->colorspace
;
624 mf
.code
= xlate
->code
;
626 /* limit to sensor capabilities */
627 ret
= v4l2_subdev_call(sd
, video
, try_mbus_fmt
, &mf
);
631 pix
->width
= mf
.width
;
632 pix
->height
= mf
.height
;
633 pix
->field
= mf
.field
;
634 pix
->colorspace
= mf
.colorspace
;
639 static int mx1_camera_reqbufs(struct soc_camera_device
*icd
,
640 struct v4l2_requestbuffers
*p
)
645 * This is for locking debugging only. I removed spinlocks and now I
646 * check whether .prepare is ever called on a linked buffer, or whether
647 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
648 * it hadn't triggered
650 for (i
= 0; i
< p
->count
; i
++) {
651 struct mx1_buffer
*buf
= container_of(icd
->vb_vidq
.bufs
[i
],
652 struct mx1_buffer
, vb
);
654 INIT_LIST_HEAD(&buf
->vb
.queue
);
660 static unsigned int mx1_camera_poll(struct file
*file
, poll_table
*pt
)
662 struct soc_camera_device
*icd
= file
->private_data
;
663 struct mx1_buffer
*buf
;
665 buf
= list_entry(icd
->vb_vidq
.stream
.next
, struct mx1_buffer
,
668 poll_wait(file
, &buf
->vb
.done
, pt
);
670 if (buf
->vb
.state
== VIDEOBUF_DONE
||
671 buf
->vb
.state
== VIDEOBUF_ERROR
)
672 return POLLIN
| POLLRDNORM
;
677 static int mx1_camera_querycap(struct soc_camera_host
*ici
,
678 struct v4l2_capability
*cap
)
680 /* cap->name is set by the friendly caller:-> */
681 strlcpy(cap
->card
, "i.MX1/i.MXL Camera", sizeof(cap
->card
));
682 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
687 static struct soc_camera_host_ops mx1_soc_camera_host_ops
= {
688 .owner
= THIS_MODULE
,
689 .add
= mx1_camera_add_device
,
690 .remove
= mx1_camera_remove_device
,
691 .set_bus_param
= mx1_camera_set_bus_param
,
692 .set_crop
= mx1_camera_set_crop
,
693 .set_fmt
= mx1_camera_set_fmt
,
694 .try_fmt
= mx1_camera_try_fmt
,
695 .init_videobuf
= mx1_camera_init_videobuf
,
696 .reqbufs
= mx1_camera_reqbufs
,
697 .poll
= mx1_camera_poll
,
698 .querycap
= mx1_camera_querycap
,
701 static struct fiq_handler fh
= {
705 static int __init
mx1_camera_probe(struct platform_device
*pdev
)
707 struct mx1_camera_dev
*pcdev
;
708 struct resource
*res
;
715 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
716 irq
= platform_get_irq(pdev
, 0);
717 if (!res
|| (int)irq
<= 0) {
722 clk
= clk_get(&pdev
->dev
, "csi_clk");
728 pcdev
= kzalloc(sizeof(*pcdev
), GFP_KERNEL
);
730 dev_err(&pdev
->dev
, "Could not allocate pcdev\n");
738 pcdev
->pdata
= pdev
->dev
.platform_data
;
741 pcdev
->mclk
= pcdev
->pdata
->mclk_10khz
* 10000;
745 "mclk_10khz == 0! Please, fix your platform data. "
746 "Using default 20MHz\n");
747 pcdev
->mclk
= 20000000;
750 INIT_LIST_HEAD(&pcdev
->capture
);
751 spin_lock_init(&pcdev
->lock
);
754 * Request the regions.
756 if (!request_mem_region(res
->start
, resource_size(res
), DRIVER_NAME
)) {
761 base
= ioremap(res
->start
, resource_size(res
));
770 pcdev
->dma_chan
= imx_dma_request_by_prio(DRIVER_NAME
, DMA_PRIO_HIGH
);
771 if (pcdev
->dma_chan
< 0) {
772 dev_err(&pdev
->dev
, "Can't request DMA for MX1 CSI\n");
776 dev_dbg(&pdev
->dev
, "got DMA channel %d\n", pcdev
->dma_chan
);
778 imx_dma_setup_handlers(pcdev
->dma_chan
, mx1_camera_dma_irq
, NULL
,
781 imx_dma_config_channel(pcdev
->dma_chan
, IMX_DMA_TYPE_FIFO
,
782 IMX_DMA_MEMSIZE_32
, MX1_DMA_REQ_CSI_R
, 0);
783 /* burst length : 16 words = 64 bytes */
784 imx_dma_config_burstlen(pcdev
->dma_chan
, 0);
787 err
= claim_fiq(&fh
);
789 dev_err(&pdev
->dev
, "Camera interrupt register failed \n");
793 set_fiq_handler(&mx1_camera_sof_fiq_start
, &mx1_camera_sof_fiq_end
-
794 &mx1_camera_sof_fiq_start
);
796 regs
.ARM_r8
= (long)MX1_DMA_DIMR
;
797 regs
.ARM_r9
= (long)MX1_DMA_CCR(pcdev
->dma_chan
);
798 regs
.ARM_r10
= (long)pcdev
->base
+ CSICR1
;
799 regs
.ARM_fp
= (long)pcdev
->base
+ CSISR
;
800 regs
.ARM_sp
= 1 << pcdev
->dma_chan
;
803 mxc_set_irq_fiq(irq
, 1);
806 pcdev
->soc_host
.drv_name
= DRIVER_NAME
;
807 pcdev
->soc_host
.ops
= &mx1_soc_camera_host_ops
;
808 pcdev
->soc_host
.priv
= pcdev
;
809 pcdev
->soc_host
.v4l2_dev
.dev
= &pdev
->dev
;
810 pcdev
->soc_host
.nr
= pdev
->id
;
811 err
= soc_camera_host_register(&pcdev
->soc_host
);
815 dev_info(&pdev
->dev
, "MX1 Camera driver loaded\n");
821 mxc_set_irq_fiq(irq
, 0);
824 imx_dma_free(pcdev
->dma_chan
);
828 release_mem_region(res
->start
, resource_size(res
));
837 static int __exit
mx1_camera_remove(struct platform_device
*pdev
)
839 struct soc_camera_host
*soc_host
= to_soc_camera_host(&pdev
->dev
);
840 struct mx1_camera_dev
*pcdev
= container_of(soc_host
,
841 struct mx1_camera_dev
, soc_host
);
842 struct resource
*res
;
844 imx_dma_free(pcdev
->dma_chan
);
845 disable_fiq(pcdev
->irq
);
846 mxc_set_irq_fiq(pcdev
->irq
, 0);
851 soc_camera_host_unregister(soc_host
);
853 iounmap(pcdev
->base
);
856 release_mem_region(res
->start
, resource_size(res
));
860 dev_info(&pdev
->dev
, "MX1 Camera driver unloaded\n");
865 static struct platform_driver mx1_camera_driver
= {
869 .remove
= __exit_p(mx1_camera_remove
),
872 static int __init
mx1_camera_init(void)
874 return platform_driver_probe(&mx1_camera_driver
, mx1_camera_probe
);
877 static void __exit
mx1_camera_exit(void)
879 return platform_driver_unregister(&mx1_camera_driver
);
882 module_init(mx1_camera_init
);
883 module_exit(mx1_camera_exit
);
885 MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver");
886 MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>");
887 MODULE_LICENSE("GPL v2");
888 MODULE_VERSION(DRIVER_VERSION
);
889 MODULE_ALIAS("platform:" DRIVER_NAME
);