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/version.h>
35 #include <linux/videodev2.h>
37 #include <media/soc_camera.h>
38 #include <media/v4l2-common.h>
39 #include <media/v4l2-dev.h>
40 #include <media/videobuf-dma-contig.h>
41 #include <media/soc_mediabus.h>
45 #include <mach/dma-mx1-mx2.h>
46 #include <mach/hardware.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 VERSION_CODE KERNEL_VERSION(0, 0, 1)
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 (SOCAM_MASTER | SOCAM_HSYNC_ACTIVE_HIGH | \
83 SOCAM_VSYNC_ACTIVE_HIGH | SOCAM_VSYNC_ACTIVE_LOW | \
84 SOCAM_PCLK_SAMPLE_RISING | SOCAM_PCLK_SAMPLE_FALLING | \
85 SOCAM_DATA_ACTIVE_HIGH | SOCAM_DATA_ACTIVE_LOW | \
88 #define MAX_VIDEO_MEM 16 /* Video memory limit in megabytes */
94 /* buffer for one video frame */
96 /* common v4l buffer stuff -- must be first */
97 struct videobuf_buffer vb
;
98 enum v4l2_mbus_pixelcode code
;
103 * i.MX1/i.MXL is only supposed to handle one camera on its Camera Sensor
104 * Interface. If anyone ever builds hardware to enable more than
105 * one camera, they will have to modify this driver too
107 struct mx1_camera_dev
{
108 struct soc_camera_host soc_host
;
109 struct soc_camera_device
*icd
;
110 struct mx1_camera_pdata
*pdata
;
111 struct mx1_buffer
*active
;
112 struct resource
*res
;
114 struct list_head capture
;
125 * Videobuf operations
127 static int mx1_videobuf_setup(struct videobuf_queue
*vq
, unsigned int *count
,
130 struct soc_camera_device
*icd
= vq
->priv_data
;
131 int bytes_per_line
= soc_mbus_bytes_per_line(icd
->user_width
,
132 icd
->current_fmt
->host_fmt
);
134 if (bytes_per_line
< 0)
135 return bytes_per_line
;
137 *size
= bytes_per_line
* icd
->user_height
;
142 if (*size
* *count
> MAX_VIDEO_MEM
* 1024 * 1024)
143 *count
= (MAX_VIDEO_MEM
* 1024 * 1024) / *size
;
145 dev_dbg(icd
->dev
.parent
, "count=%d, size=%d\n", *count
, *size
);
150 static void free_buffer(struct videobuf_queue
*vq
, struct mx1_buffer
*buf
)
152 struct soc_camera_device
*icd
= vq
->priv_data
;
153 struct videobuf_buffer
*vb
= &buf
->vb
;
155 BUG_ON(in_interrupt());
157 dev_dbg(icd
->dev
.parent
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
158 vb
, vb
->baddr
, vb
->bsize
);
161 * This waits until this buffer is out of danger, i.e., until it is no
162 * longer in STATE_QUEUED or STATE_ACTIVE
164 videobuf_waiton(vq
, vb
, 0, 0);
165 videobuf_dma_contig_free(vq
, vb
);
167 vb
->state
= VIDEOBUF_NEEDS_INIT
;
170 static int mx1_videobuf_prepare(struct videobuf_queue
*vq
,
171 struct videobuf_buffer
*vb
, enum v4l2_field field
)
173 struct soc_camera_device
*icd
= vq
->priv_data
;
174 struct mx1_buffer
*buf
= container_of(vb
, struct mx1_buffer
, vb
);
176 int bytes_per_line
= soc_mbus_bytes_per_line(icd
->user_width
,
177 icd
->current_fmt
->host_fmt
);
179 if (bytes_per_line
< 0)
180 return bytes_per_line
;
182 dev_dbg(icd
->dev
.parent
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
183 vb
, vb
->baddr
, vb
->bsize
);
185 /* Added list head initialization on alloc */
186 WARN_ON(!list_empty(&vb
->queue
));
188 BUG_ON(NULL
== icd
->current_fmt
);
191 * I think, in buf_prepare you only have to protect global data,
192 * the actual buffer is yours
196 if (buf
->code
!= icd
->current_fmt
->code
||
197 vb
->width
!= icd
->user_width
||
198 vb
->height
!= icd
->user_height
||
199 vb
->field
!= field
) {
200 buf
->code
= icd
->current_fmt
->code
;
201 vb
->width
= icd
->user_width
;
202 vb
->height
= icd
->user_height
;
204 vb
->state
= VIDEOBUF_NEEDS_INIT
;
207 vb
->size
= bytes_per_line
* vb
->height
;
208 if (0 != vb
->baddr
&& vb
->bsize
< vb
->size
) {
213 if (vb
->state
== VIDEOBUF_NEEDS_INIT
) {
214 ret
= videobuf_iolock(vq
, vb
, NULL
);
218 vb
->state
= VIDEOBUF_PREPARED
;
226 free_buffer(vq
, buf
);
232 static int mx1_camera_setup_dma(struct mx1_camera_dev
*pcdev
)
234 struct videobuf_buffer
*vbuf
= &pcdev
->active
->vb
;
235 struct device
*dev
= pcdev
->icd
->dev
.parent
;
238 if (unlikely(!pcdev
->active
)) {
239 dev_err(dev
, "DMA End IRQ with no active buffer\n");
243 /* setup sg list for future DMA */
244 ret
= imx_dma_setup_single(pcdev
->dma_chan
,
245 videobuf_to_dma_contig(vbuf
),
246 vbuf
->size
, pcdev
->res
->start
+
247 CSIRXR
, DMA_MODE_READ
);
249 dev_err(dev
, "Failed to setup DMA sg list\n");
254 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
255 static void mx1_videobuf_queue(struct videobuf_queue
*vq
,
256 struct videobuf_buffer
*vb
)
258 struct soc_camera_device
*icd
= vq
->priv_data
;
259 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
260 struct mx1_camera_dev
*pcdev
= ici
->priv
;
261 struct mx1_buffer
*buf
= container_of(vb
, struct mx1_buffer
, vb
);
263 dev_dbg(icd
->dev
.parent
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
264 vb
, vb
->baddr
, vb
->bsize
);
266 list_add_tail(&vb
->queue
, &pcdev
->capture
);
268 vb
->state
= VIDEOBUF_ACTIVE
;
270 if (!pcdev
->active
) {
273 /* setup sg list for future DMA */
274 if (!mx1_camera_setup_dma(pcdev
)) {
277 temp
= __raw_readl(pcdev
->base
+ CSICR1
) |
279 __raw_writel(temp
, pcdev
->base
+ CSICR1
);
284 static void mx1_videobuf_release(struct videobuf_queue
*vq
,
285 struct videobuf_buffer
*vb
)
287 struct mx1_buffer
*buf
= container_of(vb
, struct mx1_buffer
, vb
);
289 struct soc_camera_device
*icd
= vq
->priv_data
;
290 struct device
*dev
= icd
->dev
.parent
;
292 dev_dbg(dev
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
293 vb
, vb
->baddr
, vb
->bsize
);
296 case VIDEOBUF_ACTIVE
:
297 dev_dbg(dev
, "%s (active)\n", __func__
);
299 case VIDEOBUF_QUEUED
:
300 dev_dbg(dev
, "%s (queued)\n", __func__
);
302 case VIDEOBUF_PREPARED
:
303 dev_dbg(dev
, "%s (prepared)\n", __func__
);
306 dev_dbg(dev
, "%s (unknown)\n", __func__
);
311 free_buffer(vq
, buf
);
314 static void mx1_camera_wakeup(struct mx1_camera_dev
*pcdev
,
315 struct videobuf_buffer
*vb
,
316 struct mx1_buffer
*buf
)
318 /* _init is used to debug races, see comment in mx1_camera_reqbufs() */
319 list_del_init(&vb
->queue
);
320 vb
->state
= VIDEOBUF_DONE
;
321 do_gettimeofday(&vb
->ts
);
325 if (list_empty(&pcdev
->capture
)) {
326 pcdev
->active
= NULL
;
330 pcdev
->active
= list_entry(pcdev
->capture
.next
,
331 struct mx1_buffer
, vb
.queue
);
333 /* setup sg list for future DMA */
334 if (likely(!mx1_camera_setup_dma(pcdev
))) {
338 temp
= __raw_readl(pcdev
->base
+ CSICR1
) | CSICR1_SOF_INTEN
;
339 __raw_writel(temp
, pcdev
->base
+ CSICR1
);
343 static void mx1_camera_dma_irq(int channel
, void *data
)
345 struct mx1_camera_dev
*pcdev
= data
;
346 struct device
*dev
= pcdev
->icd
->dev
.parent
;
347 struct mx1_buffer
*buf
;
348 struct videobuf_buffer
*vb
;
351 spin_lock_irqsave(&pcdev
->lock
, flags
);
353 imx_dma_disable(channel
);
355 if (unlikely(!pcdev
->active
)) {
356 dev_err(dev
, "DMA End IRQ with no active buffer\n");
360 vb
= &pcdev
->active
->vb
;
361 buf
= container_of(vb
, struct mx1_buffer
, vb
);
362 WARN_ON(buf
->inwork
|| list_empty(&vb
->queue
));
363 dev_dbg(dev
, "%s (vb=0x%p) 0x%08lx %d\n", __func__
,
364 vb
, vb
->baddr
, vb
->bsize
);
366 mx1_camera_wakeup(pcdev
, vb
, buf
);
368 spin_unlock_irqrestore(&pcdev
->lock
, flags
);
371 static struct videobuf_queue_ops mx1_videobuf_ops
= {
372 .buf_setup
= mx1_videobuf_setup
,
373 .buf_prepare
= mx1_videobuf_prepare
,
374 .buf_queue
= mx1_videobuf_queue
,
375 .buf_release
= mx1_videobuf_release
,
378 static void mx1_camera_init_videobuf(struct videobuf_queue
*q
,
379 struct soc_camera_device
*icd
)
381 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
382 struct mx1_camera_dev
*pcdev
= ici
->priv
;
384 videobuf_queue_dma_contig_init(q
, &mx1_videobuf_ops
, icd
->dev
.parent
,
385 &pcdev
->lock
, V4L2_BUF_TYPE_VIDEO_CAPTURE
,
387 sizeof(struct mx1_buffer
), icd
, &icd
->video_lock
);
390 static int mclk_get_divisor(struct mx1_camera_dev
*pcdev
)
392 unsigned int mclk
= pcdev
->mclk
;
394 unsigned long lcdclk
;
396 lcdclk
= clk_get_rate(pcdev
->clk
);
399 * We verify platform_mclk_10khz != 0, so if anyone breaks it, here
400 * they get a nice Oops
402 div
= (lcdclk
+ 2 * mclk
- 1) / (2 * mclk
) - 1;
404 dev_dbg(pcdev
->icd
->dev
.parent
,
405 "System clock %lukHz, target freq %dkHz, divisor %lu\n",
406 lcdclk
/ 1000, mclk
/ 1000, div
);
411 static void mx1_camera_activate(struct mx1_camera_dev
*pcdev
)
413 unsigned int csicr1
= CSICR1_EN
;
415 dev_dbg(pcdev
->icd
->dev
.parent
, "Activate device\n");
417 clk_enable(pcdev
->clk
);
419 /* enable CSI before doing anything else */
420 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
422 csicr1
|= CSICR1_MCLKEN
| CSICR1_FCC
| CSICR1_GCLK_MODE
;
423 csicr1
|= CSICR1_MCLKDIV(mclk_get_divisor(pcdev
));
424 csicr1
|= CSICR1_RXFF_LEVEL(2); /* 16 words */
426 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
429 static void mx1_camera_deactivate(struct mx1_camera_dev
*pcdev
)
431 dev_dbg(pcdev
->icd
->dev
.parent
, "Deactivate device\n");
433 /* Disable all CSI interface */
434 __raw_writel(0x00, pcdev
->base
+ CSICR1
);
436 clk_disable(pcdev
->clk
);
440 * The following two functions absolutely depend on the fact, that
441 * there can be only one camera on i.MX1/i.MXL camera sensor interface
443 static int mx1_camera_add_device(struct soc_camera_device
*icd
)
445 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
446 struct mx1_camera_dev
*pcdev
= ici
->priv
;
451 dev_info(icd
->dev
.parent
, "MX1 Camera driver attached to camera %d\n",
454 mx1_camera_activate(pcdev
);
461 static void mx1_camera_remove_device(struct soc_camera_device
*icd
)
463 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
464 struct mx1_camera_dev
*pcdev
= ici
->priv
;
467 BUG_ON(icd
!= pcdev
->icd
);
469 /* disable interrupts */
470 csicr1
= __raw_readl(pcdev
->base
+ CSICR1
) & ~CSI_IRQ_MASK
;
471 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
473 /* Stop DMA engine */
474 imx_dma_disable(pcdev
->dma_chan
);
476 dev_info(icd
->dev
.parent
, "MX1 Camera driver detached from camera %d\n",
479 mx1_camera_deactivate(pcdev
);
484 static int mx1_camera_set_crop(struct soc_camera_device
*icd
,
487 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
489 return v4l2_subdev_call(sd
, video
, s_crop
, a
);
492 static int mx1_camera_set_bus_param(struct soc_camera_device
*icd
, __u32 pixfmt
)
494 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->dev
.parent
);
495 struct mx1_camera_dev
*pcdev
= ici
->priv
;
496 unsigned long camera_flags
, common_flags
;
500 camera_flags
= icd
->ops
->query_bus_param(icd
);
502 /* MX1 supports only 8bit buswidth */
503 common_flags
= soc_camera_bus_param_compatible(camera_flags
,
508 /* Make choises, based on platform choice */
509 if ((common_flags
& SOCAM_VSYNC_ACTIVE_HIGH
) &&
510 (common_flags
& SOCAM_VSYNC_ACTIVE_LOW
)) {
512 pcdev
->pdata
->flags
& MX1_CAMERA_VSYNC_HIGH
)
513 common_flags
&= ~SOCAM_VSYNC_ACTIVE_LOW
;
515 common_flags
&= ~SOCAM_VSYNC_ACTIVE_HIGH
;
518 if ((common_flags
& SOCAM_PCLK_SAMPLE_RISING
) &&
519 (common_flags
& SOCAM_PCLK_SAMPLE_FALLING
)) {
521 pcdev
->pdata
->flags
& MX1_CAMERA_PCLK_RISING
)
522 common_flags
&= ~SOCAM_PCLK_SAMPLE_FALLING
;
524 common_flags
&= ~SOCAM_PCLK_SAMPLE_RISING
;
527 if ((common_flags
& SOCAM_DATA_ACTIVE_HIGH
) &&
528 (common_flags
& SOCAM_DATA_ACTIVE_LOW
)) {
530 pcdev
->pdata
->flags
& MX1_CAMERA_DATA_HIGH
)
531 common_flags
&= ~SOCAM_DATA_ACTIVE_LOW
;
533 common_flags
&= ~SOCAM_DATA_ACTIVE_HIGH
;
536 ret
= icd
->ops
->set_bus_param(icd
, common_flags
);
540 csicr1
= __raw_readl(pcdev
->base
+ CSICR1
);
542 if (common_flags
& SOCAM_PCLK_SAMPLE_RISING
)
543 csicr1
|= CSICR1_REDGE
;
544 if (common_flags
& SOCAM_VSYNC_ACTIVE_HIGH
)
545 csicr1
|= CSICR1_SOF_POL
;
546 if (common_flags
& SOCAM_DATA_ACTIVE_LOW
)
547 csicr1
|= CSICR1_DATA_POL
;
549 __raw_writel(csicr1
, pcdev
->base
+ CSICR1
);
554 static int mx1_camera_set_fmt(struct soc_camera_device
*icd
,
555 struct v4l2_format
*f
)
557 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
558 const struct soc_camera_format_xlate
*xlate
;
559 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
560 struct v4l2_mbus_framefmt mf
;
563 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
565 dev_warn(icd
->dev
.parent
, "Format %x not found\n",
570 buswidth
= xlate
->host_fmt
->bits_per_sample
;
572 dev_warn(icd
->dev
.parent
,
573 "bits-per-sample %d for format %x unsupported\n",
574 buswidth
, pix
->pixelformat
);
578 mf
.width
= pix
->width
;
579 mf
.height
= pix
->height
;
580 mf
.field
= pix
->field
;
581 mf
.colorspace
= pix
->colorspace
;
582 mf
.code
= xlate
->code
;
584 ret
= v4l2_subdev_call(sd
, video
, s_mbus_fmt
, &mf
);
588 if (mf
.code
!= xlate
->code
)
591 pix
->width
= mf
.width
;
592 pix
->height
= mf
.height
;
593 pix
->field
= mf
.field
;
594 pix
->colorspace
= mf
.colorspace
;
595 icd
->current_fmt
= xlate
;
600 static int mx1_camera_try_fmt(struct soc_camera_device
*icd
,
601 struct v4l2_format
*f
)
603 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
604 const struct soc_camera_format_xlate
*xlate
;
605 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
606 struct v4l2_mbus_framefmt mf
;
608 /* TODO: limit to mx1 hardware capabilities */
610 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
612 dev_warn(icd
->dev
.parent
, "Format %x not found\n",
617 mf
.width
= pix
->width
;
618 mf
.height
= pix
->height
;
619 mf
.field
= pix
->field
;
620 mf
.colorspace
= pix
->colorspace
;
621 mf
.code
= xlate
->code
;
623 /* limit to sensor capabilities */
624 ret
= v4l2_subdev_call(sd
, video
, try_mbus_fmt
, &mf
);
628 pix
->width
= mf
.width
;
629 pix
->height
= mf
.height
;
630 pix
->field
= mf
.field
;
631 pix
->colorspace
= mf
.colorspace
;
636 static int mx1_camera_reqbufs(struct soc_camera_device
*icd
,
637 struct v4l2_requestbuffers
*p
)
642 * This is for locking debugging only. I removed spinlocks and now I
643 * check whether .prepare is ever called on a linked buffer, or whether
644 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
645 * it hadn't triggered
647 for (i
= 0; i
< p
->count
; i
++) {
648 struct mx1_buffer
*buf
= container_of(icd
->vb_vidq
.bufs
[i
],
649 struct mx1_buffer
, vb
);
651 INIT_LIST_HEAD(&buf
->vb
.queue
);
657 static unsigned int mx1_camera_poll(struct file
*file
, poll_table
*pt
)
659 struct soc_camera_device
*icd
= file
->private_data
;
660 struct mx1_buffer
*buf
;
662 buf
= list_entry(icd
->vb_vidq
.stream
.next
, struct mx1_buffer
,
665 poll_wait(file
, &buf
->vb
.done
, pt
);
667 if (buf
->vb
.state
== VIDEOBUF_DONE
||
668 buf
->vb
.state
== VIDEOBUF_ERROR
)
669 return POLLIN
| POLLRDNORM
;
674 static int mx1_camera_querycap(struct soc_camera_host
*ici
,
675 struct v4l2_capability
*cap
)
677 /* cap->name is set by the friendly caller:-> */
678 strlcpy(cap
->card
, "i.MX1/i.MXL Camera", sizeof(cap
->card
));
679 cap
->version
= VERSION_CODE
;
680 cap
->capabilities
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_STREAMING
;
685 static struct soc_camera_host_ops mx1_soc_camera_host_ops
= {
686 .owner
= THIS_MODULE
,
687 .add
= mx1_camera_add_device
,
688 .remove
= mx1_camera_remove_device
,
689 .set_bus_param
= mx1_camera_set_bus_param
,
690 .set_crop
= mx1_camera_set_crop
,
691 .set_fmt
= mx1_camera_set_fmt
,
692 .try_fmt
= mx1_camera_try_fmt
,
693 .init_videobuf
= mx1_camera_init_videobuf
,
694 .reqbufs
= mx1_camera_reqbufs
,
695 .poll
= mx1_camera_poll
,
696 .querycap
= mx1_camera_querycap
,
699 static struct fiq_handler fh
= {
703 static int __init
mx1_camera_probe(struct platform_device
*pdev
)
705 struct mx1_camera_dev
*pcdev
;
706 struct resource
*res
;
713 res
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
714 irq
= platform_get_irq(pdev
, 0);
715 if (!res
|| (int)irq
<= 0) {
720 clk
= clk_get(&pdev
->dev
, "csi_clk");
726 pcdev
= kzalloc(sizeof(*pcdev
), GFP_KERNEL
);
728 dev_err(&pdev
->dev
, "Could not allocate pcdev\n");
736 pcdev
->pdata
= pdev
->dev
.platform_data
;
739 pcdev
->mclk
= pcdev
->pdata
->mclk_10khz
* 10000;
743 "mclk_10khz == 0! Please, fix your platform data. "
744 "Using default 20MHz\n");
745 pcdev
->mclk
= 20000000;
748 INIT_LIST_HEAD(&pcdev
->capture
);
749 spin_lock_init(&pcdev
->lock
);
752 * Request the regions.
754 if (!request_mem_region(res
->start
, resource_size(res
), DRIVER_NAME
)) {
759 base
= ioremap(res
->start
, resource_size(res
));
768 pcdev
->dma_chan
= imx_dma_request_by_prio(DRIVER_NAME
, DMA_PRIO_HIGH
);
769 if (pcdev
->dma_chan
< 0) {
770 dev_err(&pdev
->dev
, "Can't request DMA for MX1 CSI\n");
774 dev_dbg(&pdev
->dev
, "got DMA channel %d\n", pcdev
->dma_chan
);
776 imx_dma_setup_handlers(pcdev
->dma_chan
, mx1_camera_dma_irq
, NULL
,
779 imx_dma_config_channel(pcdev
->dma_chan
, IMX_DMA_TYPE_FIFO
,
780 IMX_DMA_MEMSIZE_32
, MX1_DMA_REQ_CSI_R
, 0);
781 /* burst length : 16 words = 64 bytes */
782 imx_dma_config_burstlen(pcdev
->dma_chan
, 0);
785 err
= claim_fiq(&fh
);
787 dev_err(&pdev
->dev
, "Camera interrupt register failed \n");
791 set_fiq_handler(&mx1_camera_sof_fiq_start
, &mx1_camera_sof_fiq_end
-
792 &mx1_camera_sof_fiq_start
);
794 regs
.ARM_r8
= (long)MX1_DMA_DIMR
;
795 regs
.ARM_r9
= (long)MX1_DMA_CCR(pcdev
->dma_chan
);
796 regs
.ARM_r10
= (long)pcdev
->base
+ CSICR1
;
797 regs
.ARM_fp
= (long)pcdev
->base
+ CSISR
;
798 regs
.ARM_sp
= 1 << pcdev
->dma_chan
;
801 mxc_set_irq_fiq(irq
, 1);
804 pcdev
->soc_host
.drv_name
= DRIVER_NAME
;
805 pcdev
->soc_host
.ops
= &mx1_soc_camera_host_ops
;
806 pcdev
->soc_host
.priv
= pcdev
;
807 pcdev
->soc_host
.v4l2_dev
.dev
= &pdev
->dev
;
808 pcdev
->soc_host
.nr
= pdev
->id
;
809 err
= soc_camera_host_register(&pcdev
->soc_host
);
813 dev_info(&pdev
->dev
, "MX1 Camera driver loaded\n");
819 mxc_set_irq_fiq(irq
, 0);
822 imx_dma_free(pcdev
->dma_chan
);
826 release_mem_region(res
->start
, resource_size(res
));
835 static int __exit
mx1_camera_remove(struct platform_device
*pdev
)
837 struct soc_camera_host
*soc_host
= to_soc_camera_host(&pdev
->dev
);
838 struct mx1_camera_dev
*pcdev
= container_of(soc_host
,
839 struct mx1_camera_dev
, soc_host
);
840 struct resource
*res
;
842 imx_dma_free(pcdev
->dma_chan
);
843 disable_fiq(pcdev
->irq
);
844 mxc_set_irq_fiq(pcdev
->irq
, 0);
849 soc_camera_host_unregister(soc_host
);
851 iounmap(pcdev
->base
);
854 release_mem_region(res
->start
, resource_size(res
));
858 dev_info(&pdev
->dev
, "MX1 Camera driver unloaded\n");
863 static struct platform_driver mx1_camera_driver
= {
867 .remove
= __exit_p(mx1_camera_remove
),
870 static int __init
mx1_camera_init(void)
872 return platform_driver_probe(&mx1_camera_driver
, mx1_camera_probe
);
875 static void __exit
mx1_camera_exit(void)
877 return platform_driver_unregister(&mx1_camera_driver
);
880 module_init(mx1_camera_init
);
881 module_exit(mx1_camera_exit
);
883 MODULE_DESCRIPTION("i.MX1/i.MXL SoC Camera Host driver");
884 MODULE_AUTHOR("Paulius Zaleckas <paulius.zaleckas@teltonika.lt>");
885 MODULE_LICENSE("GPL v2");
886 MODULE_ALIAS("platform:" DRIVER_NAME
);