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);