2 * Copyright (c) 2011 Atmel Corporation
3 * Josh Wu, <josh.wu@atmel.com>
5 * Based on previous work by Lars Haring, <lars.haring@atmel.com>
7 * Based on the bttv driver for Bt848 with respective copyright holders
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
14 #include <linux/clk.h>
15 #include <linux/completion.h>
16 #include <linux/delay.h>
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/kernel.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/slab.h>
25 #include <media/atmel-isi.h>
26 #include <media/soc_camera.h>
27 #include <media/soc_mediabus.h>
28 #include <media/videobuf2-dma-contig.h>
30 #define MAX_BUFFER_NUM 32
31 #define MAX_SUPPORT_WIDTH 2048
32 #define MAX_SUPPORT_HEIGHT 2048
33 #define VID_LIMIT_BYTES (16 * 1024 * 1024)
34 #define MIN_FRAME_RATE 15
35 #define FRAME_INTERVAL_MILLI_SEC (1000 / MIN_FRAME_RATE)
44 /* Frame buffer descriptor */
46 /* Physical address of the frame buffer */
48 /* DMA Control Register(only in HISI2) */
50 /* Physical address of the next fbd */
54 static void set_dma_ctrl(struct fbd
*fb_desc
, u32 ctrl
)
56 fb_desc
->dma_ctrl
= ctrl
;
60 struct list_head list
;
65 /* Frame buffer data */
68 struct isi_dma_desc
*p_dma_desc
;
69 struct list_head list
;
73 /* Protects the access of variables shared with the ISR */
78 /* State of the ISI module in capturing mode */
81 /* Wait queue for waiting for SOF */
82 wait_queue_head_t vsync_wq
;
84 struct vb2_alloc_ctx
*alloc_ctx
;
86 /* Allocate descriptors for dma buffer use */
87 struct fbd
*p_fb_descriptors
;
88 u32 fb_descriptors_phys
;
89 struct list_head dma_desc_head
;
90 struct isi_dma_desc dma_desc
[MAX_BUFFER_NUM
];
92 struct completion complete
;
96 struct isi_platform_data
*pdata
;
97 u16 width_flags
; /* max 12 bits */
99 struct list_head video_buffer_list
;
100 struct frame_buffer
*active
;
102 struct soc_camera_device
*icd
;
103 struct soc_camera_host soc_host
;
106 static void isi_writel(struct atmel_isi
*isi
, u32 reg
, u32 val
)
108 writel(val
, isi
->regs
+ reg
);
110 static u32
isi_readl(struct atmel_isi
*isi
, u32 reg
)
112 return readl(isi
->regs
+ reg
);
115 static int configure_geometry(struct atmel_isi
*isi
, u32 width
,
116 u32 height
, enum v4l2_mbus_pixelcode code
)
121 /* YUV, including grey */
122 case V4L2_MBUS_FMT_Y8_1X8
:
123 cr
= ISI_CFG2_GRAYSCALE
;
125 case V4L2_MBUS_FMT_UYVY8_2X8
:
126 cr
= ISI_CFG2_YCC_SWAP_MODE_3
;
128 case V4L2_MBUS_FMT_VYUY8_2X8
:
129 cr
= ISI_CFG2_YCC_SWAP_MODE_2
;
131 case V4L2_MBUS_FMT_YUYV8_2X8
:
132 cr
= ISI_CFG2_YCC_SWAP_MODE_1
;
134 case V4L2_MBUS_FMT_YVYU8_2X8
:
135 cr
= ISI_CFG2_YCC_SWAP_DEFAULT
;
142 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
144 cfg2
= isi_readl(isi
, ISI_CFG2
);
147 cfg2
&= ~(ISI_CFG2_IM_HSIZE_MASK
);
148 cfg2
|= ((width
- 1) << ISI_CFG2_IM_HSIZE_OFFSET
) &
149 ISI_CFG2_IM_HSIZE_MASK
;
151 cfg2
&= ~(ISI_CFG2_IM_VSIZE_MASK
);
152 cfg2
|= ((height
- 1) << ISI_CFG2_IM_VSIZE_OFFSET
)
153 & ISI_CFG2_IM_VSIZE_MASK
;
154 isi_writel(isi
, ISI_CFG2
, cfg2
);
159 static irqreturn_t
atmel_isi_handle_streaming(struct atmel_isi
*isi
)
162 struct vb2_buffer
*vb
= &isi
->active
->vb
;
163 struct frame_buffer
*buf
= isi
->active
;
165 list_del_init(&buf
->list
);
166 do_gettimeofday(&vb
->v4l2_buf
.timestamp
);
167 vb
->v4l2_buf
.sequence
= isi
->sequence
++;
168 vb2_buffer_done(vb
, VB2_BUF_STATE_DONE
);
171 if (list_empty(&isi
->video_buffer_list
)) {
174 /* start next dma frame. */
175 isi
->active
= list_entry(isi
->video_buffer_list
.next
,
176 struct frame_buffer
, list
);
177 isi_writel(isi
, ISI_DMA_C_DSCR
,
178 isi
->active
->p_dma_desc
->fbd_phys
);
179 isi_writel(isi
, ISI_DMA_C_CTRL
,
180 ISI_DMA_CTRL_FETCH
| ISI_DMA_CTRL_DONE
);
181 isi_writel(isi
, ISI_DMA_CHER
, ISI_DMA_CHSR_C_CH
);
186 /* ISI interrupt service routine */
187 static irqreturn_t
isi_interrupt(int irq
, void *dev_id
)
189 struct atmel_isi
*isi
= dev_id
;
190 u32 status
, mask
, pending
;
191 irqreturn_t ret
= IRQ_NONE
;
193 spin_lock(&isi
->lock
);
195 status
= isi_readl(isi
, ISI_STATUS
);
196 mask
= isi_readl(isi
, ISI_INTMASK
);
197 pending
= status
& mask
;
199 if (pending
& ISI_CTRL_SRST
) {
200 complete(&isi
->complete
);
201 isi_writel(isi
, ISI_INTDIS
, ISI_CTRL_SRST
);
203 } else if (pending
& ISI_CTRL_DIS
) {
204 complete(&isi
->complete
);
205 isi_writel(isi
, ISI_INTDIS
, ISI_CTRL_DIS
);
208 if ((pending
& ISI_SR_VSYNC
) &&
209 (isi
->state
== ISI_STATE_IDLE
)) {
210 isi
->state
= ISI_STATE_READY
;
211 wake_up_interruptible(&isi
->vsync_wq
);
214 if (likely(pending
& ISI_SR_CXFR_DONE
))
215 ret
= atmel_isi_handle_streaming(isi
);
218 spin_unlock(&isi
->lock
);
222 #define WAIT_ISI_RESET 1
223 #define WAIT_ISI_DISABLE 0
224 static int atmel_isi_wait_status(struct atmel_isi
*isi
, int wait_reset
)
226 unsigned long timeout
;
228 * The reset or disable will only succeed if we have a
229 * pixel clock from the camera.
231 init_completion(&isi
->complete
);
234 isi_writel(isi
, ISI_INTEN
, ISI_CTRL_SRST
);
235 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_SRST
);
237 isi_writel(isi
, ISI_INTEN
, ISI_CTRL_DIS
);
238 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
241 timeout
= wait_for_completion_timeout(&isi
->complete
,
242 msecs_to_jiffies(100));
249 /* ------------------------------------------------------------------
251 ------------------------------------------------------------------*/
252 static int queue_setup(struct vb2_queue
*vq
, const struct v4l2_format
*fmt
,
253 unsigned int *nbuffers
, unsigned int *nplanes
,
254 unsigned int sizes
[], void *alloc_ctxs
[])
256 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
257 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
258 struct atmel_isi
*isi
= ici
->priv
;
260 int ret
, bytes_per_line
;
263 ret
= atmel_isi_wait_status(isi
, WAIT_ISI_RESET
);
265 dev_err(icd
->parent
, "Reset ISI timed out\n");
268 /* Disable all interrupts */
269 isi_writel(isi
, ISI_INTDIS
, ~0UL);
271 bytes_per_line
= soc_mbus_bytes_per_line(icd
->user_width
,
272 icd
->current_fmt
->host_fmt
);
274 if (bytes_per_line
< 0)
275 return bytes_per_line
;
277 size
= bytes_per_line
* icd
->user_height
;
279 if (!*nbuffers
|| *nbuffers
> MAX_BUFFER_NUM
)
280 *nbuffers
= MAX_BUFFER_NUM
;
282 if (size
* *nbuffers
> VID_LIMIT_BYTES
)
283 *nbuffers
= VID_LIMIT_BYTES
/ size
;
287 alloc_ctxs
[0] = isi
->alloc_ctx
;
292 dev_dbg(icd
->parent
, "%s, count=%d, size=%ld\n", __func__
,
298 static int buffer_init(struct vb2_buffer
*vb
)
300 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
302 buf
->p_dma_desc
= NULL
;
303 INIT_LIST_HEAD(&buf
->list
);
308 static int buffer_prepare(struct vb2_buffer
*vb
)
310 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
311 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
312 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
313 struct atmel_isi
*isi
= ici
->priv
;
315 struct isi_dma_desc
*desc
;
316 int bytes_per_line
= soc_mbus_bytes_per_line(icd
->user_width
,
317 icd
->current_fmt
->host_fmt
);
319 if (bytes_per_line
< 0)
320 return bytes_per_line
;
322 size
= bytes_per_line
* icd
->user_height
;
324 if (vb2_plane_size(vb
, 0) < size
) {
325 dev_err(icd
->parent
, "%s data will not fit into plane (%lu < %lu)\n",
326 __func__
, vb2_plane_size(vb
, 0), size
);
330 vb2_set_plane_payload(&buf
->vb
, 0, size
);
332 if (!buf
->p_dma_desc
) {
333 if (list_empty(&isi
->dma_desc_head
)) {
334 dev_err(icd
->parent
, "Not enough dma descriptors.\n");
337 /* Get an available descriptor */
338 desc
= list_entry(isi
->dma_desc_head
.next
,
339 struct isi_dma_desc
, list
);
340 /* Delete the descriptor since now it is used */
341 list_del_init(&desc
->list
);
343 /* Initialize the dma descriptor */
344 desc
->p_fbd
->fb_address
=
345 vb2_dma_contig_plane_dma_addr(vb
, 0);
346 desc
->p_fbd
->next_fbd_address
= 0;
347 set_dma_ctrl(desc
->p_fbd
, ISI_DMA_CTRL_WB
);
349 buf
->p_dma_desc
= desc
;
355 static void buffer_cleanup(struct vb2_buffer
*vb
)
357 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
358 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
359 struct atmel_isi
*isi
= ici
->priv
;
360 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
362 /* This descriptor is available now and we add to head list */
364 list_add(&buf
->p_dma_desc
->list
, &isi
->dma_desc_head
);
367 static void start_dma(struct atmel_isi
*isi
, struct frame_buffer
*buffer
)
371 cfg1
= isi_readl(isi
, ISI_CFG1
);
372 /* Enable irq: cxfr for the codec path, pxfr for the preview path */
373 isi_writel(isi
, ISI_INTEN
,
374 ISI_SR_CXFR_DONE
| ISI_SR_PXFR_DONE
);
376 /* Check if already in a frame */
377 if (isi_readl(isi
, ISI_STATUS
) & ISI_CTRL_CDC
) {
378 dev_err(isi
->icd
->parent
, "Already in frame handling.\n");
382 isi_writel(isi
, ISI_DMA_C_DSCR
, buffer
->p_dma_desc
->fbd_phys
);
383 isi_writel(isi
, ISI_DMA_C_CTRL
, ISI_DMA_CTRL_FETCH
| ISI_DMA_CTRL_DONE
);
384 isi_writel(isi
, ISI_DMA_CHER
, ISI_DMA_CHSR_C_CH
);
386 /* Enable linked list */
387 cfg1
|= isi
->pdata
->frate
| ISI_CFG1_DISCR
;
389 /* Enable codec path and ISI */
390 ctrl
= ISI_CTRL_CDC
| ISI_CTRL_EN
;
391 isi_writel(isi
, ISI_CTRL
, ctrl
);
392 isi_writel(isi
, ISI_CFG1
, cfg1
);
395 static void buffer_queue(struct vb2_buffer
*vb
)
397 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
398 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
399 struct atmel_isi
*isi
= ici
->priv
;
400 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
401 unsigned long flags
= 0;
403 spin_lock_irqsave(&isi
->lock
, flags
);
404 list_add_tail(&buf
->list
, &isi
->video_buffer_list
);
406 if (isi
->active
== NULL
) {
408 if (vb2_is_streaming(vb
->vb2_queue
))
411 spin_unlock_irqrestore(&isi
->lock
, flags
);
414 static int start_streaming(struct vb2_queue
*vq
, unsigned int count
)
416 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
417 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
418 struct atmel_isi
*isi
= ici
->priv
;
423 spin_lock_irq(&isi
->lock
);
424 isi
->state
= ISI_STATE_IDLE
;
425 /* Clear any pending SOF interrupt */
426 sr
= isi_readl(isi
, ISI_STATUS
);
427 /* Enable VSYNC interrupt for SOF */
428 isi_writel(isi
, ISI_INTEN
, ISI_SR_VSYNC
);
429 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_EN
);
430 spin_unlock_irq(&isi
->lock
);
432 dev_dbg(icd
->parent
, "Waiting for SOF\n");
433 ret
= wait_event_interruptible(isi
->vsync_wq
,
434 isi
->state
!= ISI_STATE_IDLE
);
438 if (isi
->state
!= ISI_STATE_READY
) {
443 spin_lock_irq(&isi
->lock
);
444 isi
->state
= ISI_STATE_WAIT_SOF
;
445 isi_writel(isi
, ISI_INTDIS
, ISI_SR_VSYNC
);
447 start_dma(isi
, isi
->active
);
448 spin_unlock_irq(&isi
->lock
);
454 INIT_LIST_HEAD(&isi
->video_buffer_list
);
458 /* abort streaming and wait for last buffer */
459 static int stop_streaming(struct vb2_queue
*vq
)
461 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
462 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
463 struct atmel_isi
*isi
= ici
->priv
;
464 struct frame_buffer
*buf
, *node
;
466 unsigned long timeout
;
468 spin_lock_irq(&isi
->lock
);
470 /* Release all active buffers */
471 list_for_each_entry_safe(buf
, node
, &isi
->video_buffer_list
, list
) {
472 list_del_init(&buf
->list
);
473 vb2_buffer_done(&buf
->vb
, VB2_BUF_STATE_ERROR
);
475 spin_unlock_irq(&isi
->lock
);
477 timeout
= jiffies
+ FRAME_INTERVAL_MILLI_SEC
* HZ
;
478 /* Wait until the end of the current frame. */
479 while ((isi_readl(isi
, ISI_STATUS
) & ISI_CTRL_CDC
) &&
480 time_before(jiffies
, timeout
))
483 if (time_after(jiffies
, timeout
)) {
485 "Timeout waiting for finishing codec request\n");
489 /* Disable interrupts */
490 isi_writel(isi
, ISI_INTDIS
,
491 ISI_SR_CXFR_DONE
| ISI_SR_PXFR_DONE
);
493 /* Disable ISI and wait for it is done */
494 ret
= atmel_isi_wait_status(isi
, WAIT_ISI_DISABLE
);
496 dev_err(icd
->parent
, "Disable ISI timed out\n");
501 static struct vb2_ops isi_video_qops
= {
502 .queue_setup
= queue_setup
,
503 .buf_init
= buffer_init
,
504 .buf_prepare
= buffer_prepare
,
505 .buf_cleanup
= buffer_cleanup
,
506 .buf_queue
= buffer_queue
,
507 .start_streaming
= start_streaming
,
508 .stop_streaming
= stop_streaming
,
509 .wait_prepare
= soc_camera_unlock
,
510 .wait_finish
= soc_camera_lock
,
513 /* ------------------------------------------------------------------
514 SOC camera operations for the device
515 ------------------------------------------------------------------*/
516 static int isi_camera_init_videobuf(struct vb2_queue
*q
,
517 struct soc_camera_device
*icd
)
519 q
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
520 q
->io_modes
= VB2_MMAP
;
522 q
->buf_struct_size
= sizeof(struct frame_buffer
);
523 q
->ops
= &isi_video_qops
;
524 q
->mem_ops
= &vb2_dma_contig_memops
;
526 return vb2_queue_init(q
);
529 static int isi_camera_set_fmt(struct soc_camera_device
*icd
,
530 struct v4l2_format
*f
)
532 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
533 struct atmel_isi
*isi
= ici
->priv
;
534 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
535 const struct soc_camera_format_xlate
*xlate
;
536 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
537 struct v4l2_mbus_framefmt mf
;
540 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
542 dev_warn(icd
->parent
, "Format %x not found\n",
547 dev_dbg(icd
->parent
, "Plan to set format %dx%d\n",
548 pix
->width
, pix
->height
);
550 mf
.width
= pix
->width
;
551 mf
.height
= pix
->height
;
552 mf
.field
= pix
->field
;
553 mf
.colorspace
= pix
->colorspace
;
554 mf
.code
= xlate
->code
;
556 ret
= v4l2_subdev_call(sd
, video
, s_mbus_fmt
, &mf
);
560 if (mf
.code
!= xlate
->code
)
563 ret
= configure_geometry(isi
, pix
->width
, pix
->height
, xlate
->code
);
567 pix
->width
= mf
.width
;
568 pix
->height
= mf
.height
;
569 pix
->field
= mf
.field
;
570 pix
->colorspace
= mf
.colorspace
;
571 icd
->current_fmt
= xlate
;
573 dev_dbg(icd
->parent
, "Finally set format %dx%d\n",
574 pix
->width
, pix
->height
);
579 static int isi_camera_try_fmt(struct soc_camera_device
*icd
,
580 struct v4l2_format
*f
)
582 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
583 const struct soc_camera_format_xlate
*xlate
;
584 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
585 struct v4l2_mbus_framefmt mf
;
586 u32 pixfmt
= pix
->pixelformat
;
589 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
590 if (pixfmt
&& !xlate
) {
591 dev_warn(icd
->parent
, "Format %x not found\n", pixfmt
);
595 /* limit to Atmel ISI hardware capabilities */
596 if (pix
->height
> MAX_SUPPORT_HEIGHT
)
597 pix
->height
= MAX_SUPPORT_HEIGHT
;
598 if (pix
->width
> MAX_SUPPORT_WIDTH
)
599 pix
->width
= MAX_SUPPORT_WIDTH
;
601 /* limit to sensor capabilities */
602 mf
.width
= pix
->width
;
603 mf
.height
= pix
->height
;
604 mf
.field
= pix
->field
;
605 mf
.colorspace
= pix
->colorspace
;
606 mf
.code
= xlate
->code
;
608 ret
= v4l2_subdev_call(sd
, video
, try_mbus_fmt
, &mf
);
612 pix
->width
= mf
.width
;
613 pix
->height
= mf
.height
;
614 pix
->colorspace
= mf
.colorspace
;
618 pix
->field
= V4L2_FIELD_NONE
;
620 case V4L2_FIELD_NONE
:
623 dev_err(icd
->parent
, "Field type %d unsupported.\n",
631 static const struct soc_mbus_pixelfmt isi_camera_formats
[] = {
633 .fourcc
= V4L2_PIX_FMT_YUYV
,
634 .name
= "Packed YUV422 16 bit",
635 .bits_per_sample
= 8,
636 .packing
= SOC_MBUS_PACKING_2X8_PADHI
,
637 .order
= SOC_MBUS_ORDER_LE
,
641 /* This will be corrected as we get more formats */
642 static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt
*fmt
)
644 return fmt
->packing
== SOC_MBUS_PACKING_NONE
||
645 (fmt
->bits_per_sample
== 8 &&
646 fmt
->packing
== SOC_MBUS_PACKING_2X8_PADHI
) ||
647 (fmt
->bits_per_sample
> 8 &&
648 fmt
->packing
== SOC_MBUS_PACKING_EXTEND16
);
651 #define ISI_BUS_PARAM (V4L2_MBUS_MASTER | \
652 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
653 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
654 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
655 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
656 V4L2_MBUS_PCLK_SAMPLE_RISING | \
657 V4L2_MBUS_PCLK_SAMPLE_FALLING | \
658 V4L2_MBUS_DATA_ACTIVE_HIGH)
660 static int isi_camera_try_bus_param(struct soc_camera_device
*icd
,
661 unsigned char buswidth
)
663 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
664 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
665 struct atmel_isi
*isi
= ici
->priv
;
666 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
667 unsigned long common_flags
;
670 ret
= v4l2_subdev_call(sd
, video
, g_mbus_config
, &cfg
);
672 common_flags
= soc_mbus_config_compatible(&cfg
,
675 dev_warn(icd
->parent
,
676 "Flags incompatible: camera 0x%x, host 0x%x\n",
677 cfg
.flags
, ISI_BUS_PARAM
);
680 } else if (ret
!= -ENOIOCTLCMD
) {
684 if ((1 << (buswidth
- 1)) & isi
->width_flags
)
690 static int isi_camera_get_formats(struct soc_camera_device
*icd
,
692 struct soc_camera_format_xlate
*xlate
)
694 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
695 int formats
= 0, ret
;
697 enum v4l2_mbus_pixelcode code
;
698 /* soc camera host format */
699 const struct soc_mbus_pixelfmt
*fmt
;
701 ret
= v4l2_subdev_call(sd
, video
, enum_mbus_fmt
, idx
, &code
);
703 /* No more formats */
706 fmt
= soc_mbus_get_fmtdesc(code
);
709 "Invalid format code #%u: %d\n", idx
, code
);
713 /* This also checks support for the requested bits-per-sample */
714 ret
= isi_camera_try_bus_param(icd
, fmt
->bits_per_sample
);
717 "Fail to try the bus parameters.\n");
722 case V4L2_MBUS_FMT_UYVY8_2X8
:
723 case V4L2_MBUS_FMT_VYUY8_2X8
:
724 case V4L2_MBUS_FMT_YUYV8_2X8
:
725 case V4L2_MBUS_FMT_YVYU8_2X8
:
728 xlate
->host_fmt
= &isi_camera_formats
[0];
731 dev_dbg(icd
->parent
, "Providing format %s using code %d\n",
732 isi_camera_formats
[0].name
, code
);
736 if (!isi_camera_packing_supported(fmt
))
740 "Providing format %s in pass-through mode\n",
744 /* Generic pass-through */
747 xlate
->host_fmt
= fmt
;
755 /* Called with .video_lock held */
756 static int isi_camera_add_device(struct soc_camera_device
*icd
)
758 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
759 struct atmel_isi
*isi
= ici
->priv
;
765 ret
= clk_enable(isi
->pclk
);
770 dev_dbg(icd
->parent
, "Atmel ISI Camera driver attached to camera %d\n",
774 /* Called with .video_lock held */
775 static void isi_camera_remove_device(struct soc_camera_device
*icd
)
777 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
778 struct atmel_isi
*isi
= ici
->priv
;
780 BUG_ON(icd
!= isi
->icd
);
782 clk_disable(isi
->pclk
);
785 dev_dbg(icd
->parent
, "Atmel ISI Camera driver detached from camera %d\n",
789 static unsigned int isi_camera_poll(struct file
*file
, poll_table
*pt
)
791 struct soc_camera_device
*icd
= file
->private_data
;
793 return vb2_poll(&icd
->vb2_vidq
, file
, pt
);
796 static int isi_camera_querycap(struct soc_camera_host
*ici
,
797 struct v4l2_capability
*cap
)
799 strcpy(cap
->driver
, "atmel-isi");
800 strcpy(cap
->card
, "Atmel Image Sensor Interface");
801 cap
->capabilities
= (V4L2_CAP_VIDEO_CAPTURE
|
806 static int isi_camera_set_bus_param(struct soc_camera_device
*icd
, u32 pixfmt
)
808 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
809 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
810 struct atmel_isi
*isi
= ici
->priv
;
811 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
812 unsigned long common_flags
;
816 ret
= v4l2_subdev_call(sd
, video
, g_mbus_config
, &cfg
);
818 common_flags
= soc_mbus_config_compatible(&cfg
,
821 dev_warn(icd
->parent
,
822 "Flags incompatible: camera 0x%x, host 0x%x\n",
823 cfg
.flags
, ISI_BUS_PARAM
);
826 } else if (ret
!= -ENOIOCTLCMD
) {
829 common_flags
= ISI_BUS_PARAM
;
831 dev_dbg(icd
->parent
, "Flags cam: 0x%x host: 0x%x common: 0x%lx\n",
832 cfg
.flags
, ISI_BUS_PARAM
, common_flags
);
834 /* Make choises, based on platform preferences */
835 if ((common_flags
& V4L2_MBUS_HSYNC_ACTIVE_HIGH
) &&
836 (common_flags
& V4L2_MBUS_HSYNC_ACTIVE_LOW
)) {
837 if (isi
->pdata
->hsync_act_low
)
838 common_flags
&= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH
;
840 common_flags
&= ~V4L2_MBUS_HSYNC_ACTIVE_LOW
;
843 if ((common_flags
& V4L2_MBUS_VSYNC_ACTIVE_HIGH
) &&
844 (common_flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
)) {
845 if (isi
->pdata
->vsync_act_low
)
846 common_flags
&= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH
;
848 common_flags
&= ~V4L2_MBUS_VSYNC_ACTIVE_LOW
;
851 if ((common_flags
& V4L2_MBUS_PCLK_SAMPLE_RISING
) &&
852 (common_flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)) {
853 if (isi
->pdata
->pclk_act_falling
)
854 common_flags
&= ~V4L2_MBUS_PCLK_SAMPLE_RISING
;
856 common_flags
&= ~V4L2_MBUS_PCLK_SAMPLE_FALLING
;
859 cfg
.flags
= common_flags
;
860 ret
= v4l2_subdev_call(sd
, video
, s_mbus_config
, &cfg
);
861 if (ret
< 0 && ret
!= -ENOIOCTLCMD
) {
862 dev_dbg(icd
->parent
, "camera s_mbus_config(0x%lx) returned %d\n",
867 /* set bus param for ISI */
868 if (common_flags
& V4L2_MBUS_HSYNC_ACTIVE_LOW
)
869 cfg1
|= ISI_CFG1_HSYNC_POL_ACTIVE_LOW
;
870 if (common_flags
& V4L2_MBUS_VSYNC_ACTIVE_LOW
)
871 cfg1
|= ISI_CFG1_VSYNC_POL_ACTIVE_LOW
;
872 if (common_flags
& V4L2_MBUS_PCLK_SAMPLE_FALLING
)
873 cfg1
|= ISI_CFG1_PIXCLK_POL_ACTIVE_FALLING
;
875 if (isi
->pdata
->has_emb_sync
)
876 cfg1
|= ISI_CFG1_EMB_SYNC
;
877 if (isi
->pdata
->isi_full_mode
)
878 cfg1
|= ISI_CFG1_FULL_MODE
;
880 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
881 isi_writel(isi
, ISI_CFG1
, cfg1
);
886 static struct soc_camera_host_ops isi_soc_camera_host_ops
= {
887 .owner
= THIS_MODULE
,
888 .add
= isi_camera_add_device
,
889 .remove
= isi_camera_remove_device
,
890 .set_fmt
= isi_camera_set_fmt
,
891 .try_fmt
= isi_camera_try_fmt
,
892 .get_formats
= isi_camera_get_formats
,
893 .init_videobuf2
= isi_camera_init_videobuf
,
894 .poll
= isi_camera_poll
,
895 .querycap
= isi_camera_querycap
,
896 .set_bus_param
= isi_camera_set_bus_param
,
899 /* -----------------------------------------------------------------------*/
900 static int __devexit
atmel_isi_remove(struct platform_device
*pdev
)
902 struct soc_camera_host
*soc_host
= to_soc_camera_host(&pdev
->dev
);
903 struct atmel_isi
*isi
= container_of(soc_host
,
904 struct atmel_isi
, soc_host
);
906 free_irq(isi
->irq
, isi
);
907 soc_camera_host_unregister(soc_host
);
908 vb2_dma_contig_cleanup_ctx(isi
->alloc_ctx
);
909 dma_free_coherent(&pdev
->dev
,
910 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
911 isi
->p_fb_descriptors
,
912 isi
->fb_descriptors_phys
);
921 static int __devinit
atmel_isi_probe(struct platform_device
*pdev
)
924 struct atmel_isi
*isi
;
926 struct resource
*regs
;
928 struct device
*dev
= &pdev
->dev
;
929 struct soc_camera_host
*soc_host
;
930 struct isi_platform_data
*pdata
;
932 pdata
= dev
->platform_data
;
933 if (!pdata
|| !pdata
->data_width_flags
) {
935 "No config available for Atmel ISI\n");
939 regs
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
943 pclk
= clk_get(&pdev
->dev
, "isi_clk");
945 return PTR_ERR(pclk
);
947 isi
= kzalloc(sizeof(struct atmel_isi
), GFP_KERNEL
);
950 dev_err(&pdev
->dev
, "Can't allocate interface!\n");
957 spin_lock_init(&isi
->lock
);
958 init_waitqueue_head(&isi
->vsync_wq
);
959 INIT_LIST_HEAD(&isi
->video_buffer_list
);
960 INIT_LIST_HEAD(&isi
->dma_desc_head
);
962 isi
->p_fb_descriptors
= dma_alloc_coherent(&pdev
->dev
,
963 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
964 &isi
->fb_descriptors_phys
,
966 if (!isi
->p_fb_descriptors
) {
968 dev_err(&pdev
->dev
, "Can't allocate descriptors!\n");
969 goto err_alloc_descriptors
;
972 for (i
= 0; i
< MAX_BUFFER_NUM
; i
++) {
973 isi
->dma_desc
[i
].p_fbd
= isi
->p_fb_descriptors
+ i
;
974 isi
->dma_desc
[i
].fbd_phys
= isi
->fb_descriptors_phys
+
975 i
* sizeof(struct fbd
);
976 list_add(&isi
->dma_desc
[i
].list
, &isi
->dma_desc_head
);
979 isi
->alloc_ctx
= vb2_dma_contig_init_ctx(&pdev
->dev
);
980 if (IS_ERR(isi
->alloc_ctx
)) {
981 ret
= PTR_ERR(isi
->alloc_ctx
);
985 isi
->regs
= ioremap(regs
->start
, resource_size(regs
));
991 if (pdata
->data_width_flags
& ISI_DATAWIDTH_8
)
992 isi
->width_flags
= 1 << 7;
993 if (pdata
->data_width_flags
& ISI_DATAWIDTH_10
)
994 isi
->width_flags
|= 1 << 9;
996 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
998 irq
= platform_get_irq(pdev
, 0);
1004 ret
= request_irq(irq
, isi_interrupt
, 0, "isi", isi
);
1006 dev_err(&pdev
->dev
, "Unable to request irq %d\n", irq
);
1011 soc_host
= &isi
->soc_host
;
1012 soc_host
->drv_name
= "isi-camera";
1013 soc_host
->ops
= &isi_soc_camera_host_ops
;
1014 soc_host
->priv
= isi
;
1015 soc_host
->v4l2_dev
.dev
= &pdev
->dev
;
1016 soc_host
->nr
= pdev
->id
;
1018 ret
= soc_camera_host_register(soc_host
);
1020 dev_err(&pdev
->dev
, "Unable to register soc camera host\n");
1021 goto err_register_soc_camera_host
;
1025 err_register_soc_camera_host
:
1026 free_irq(isi
->irq
, isi
);
1030 vb2_dma_contig_cleanup_ctx(isi
->alloc_ctx
);
1032 dma_free_coherent(&pdev
->dev
,
1033 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
1034 isi
->p_fb_descriptors
,
1035 isi
->fb_descriptors_phys
);
1036 err_alloc_descriptors
:
1044 static struct platform_driver atmel_isi_driver
= {
1045 .probe
= atmel_isi_probe
,
1046 .remove
= __devexit_p(atmel_isi_remove
),
1048 .name
= "atmel_isi",
1049 .owner
= THIS_MODULE
,
1053 static int __init
atmel_isi_init_module(void)
1055 return platform_driver_probe(&atmel_isi_driver
, &atmel_isi_probe
);
1058 static void __exit
atmel_isi_exit(void)
1060 platform_driver_unregister(&atmel_isi_driver
);
1062 module_init(atmel_isi_init_module
);
1063 module_exit(atmel_isi_exit
);
1065 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
1066 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
1067 MODULE_LICENSE("GPL");
1068 MODULE_SUPPORTED_DEVICE("video");