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
;
93 /* ISI peripherial clock */
95 /* ISI_MCK, feed to camera sensor to generate pixel clock */
99 struct isi_platform_data
*pdata
;
100 u16 width_flags
; /* max 12 bits */
102 struct list_head video_buffer_list
;
103 struct frame_buffer
*active
;
105 struct soc_camera_device
*icd
;
106 struct soc_camera_host soc_host
;
109 static void isi_writel(struct atmel_isi
*isi
, u32 reg
, u32 val
)
111 writel(val
, isi
->regs
+ reg
);
113 static u32
isi_readl(struct atmel_isi
*isi
, u32 reg
)
115 return readl(isi
->regs
+ reg
);
118 static int configure_geometry(struct atmel_isi
*isi
, u32 width
,
119 u32 height
, enum v4l2_mbus_pixelcode code
)
124 /* YUV, including grey */
125 case V4L2_MBUS_FMT_Y8_1X8
:
126 cr
= ISI_CFG2_GRAYSCALE
;
128 case V4L2_MBUS_FMT_UYVY8_2X8
:
129 cr
= ISI_CFG2_YCC_SWAP_MODE_3
;
131 case V4L2_MBUS_FMT_VYUY8_2X8
:
132 cr
= ISI_CFG2_YCC_SWAP_MODE_2
;
134 case V4L2_MBUS_FMT_YUYV8_2X8
:
135 cr
= ISI_CFG2_YCC_SWAP_MODE_1
;
137 case V4L2_MBUS_FMT_YVYU8_2X8
:
138 cr
= ISI_CFG2_YCC_SWAP_DEFAULT
;
145 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
147 cfg2
= isi_readl(isi
, ISI_CFG2
);
150 cfg2
&= ~(ISI_CFG2_IM_HSIZE_MASK
);
151 cfg2
|= ((width
- 1) << ISI_CFG2_IM_HSIZE_OFFSET
) &
152 ISI_CFG2_IM_HSIZE_MASK
;
154 cfg2
&= ~(ISI_CFG2_IM_VSIZE_MASK
);
155 cfg2
|= ((height
- 1) << ISI_CFG2_IM_VSIZE_OFFSET
)
156 & ISI_CFG2_IM_VSIZE_MASK
;
157 isi_writel(isi
, ISI_CFG2
, cfg2
);
162 static irqreturn_t
atmel_isi_handle_streaming(struct atmel_isi
*isi
)
165 struct vb2_buffer
*vb
= &isi
->active
->vb
;
166 struct frame_buffer
*buf
= isi
->active
;
168 list_del_init(&buf
->list
);
169 do_gettimeofday(&vb
->v4l2_buf
.timestamp
);
170 vb
->v4l2_buf
.sequence
= isi
->sequence
++;
171 vb2_buffer_done(vb
, VB2_BUF_STATE_DONE
);
174 if (list_empty(&isi
->video_buffer_list
)) {
177 /* start next dma frame. */
178 isi
->active
= list_entry(isi
->video_buffer_list
.next
,
179 struct frame_buffer
, list
);
180 isi_writel(isi
, ISI_DMA_C_DSCR
,
181 isi
->active
->p_dma_desc
->fbd_phys
);
182 isi_writel(isi
, ISI_DMA_C_CTRL
,
183 ISI_DMA_CTRL_FETCH
| ISI_DMA_CTRL_DONE
);
184 isi_writel(isi
, ISI_DMA_CHER
, ISI_DMA_CHSR_C_CH
);
189 /* ISI interrupt service routine */
190 static irqreturn_t
isi_interrupt(int irq
, void *dev_id
)
192 struct atmel_isi
*isi
= dev_id
;
193 u32 status
, mask
, pending
;
194 irqreturn_t ret
= IRQ_NONE
;
196 spin_lock(&isi
->lock
);
198 status
= isi_readl(isi
, ISI_STATUS
);
199 mask
= isi_readl(isi
, ISI_INTMASK
);
200 pending
= status
& mask
;
202 if (pending
& ISI_CTRL_SRST
) {
203 complete(&isi
->complete
);
204 isi_writel(isi
, ISI_INTDIS
, ISI_CTRL_SRST
);
206 } else if (pending
& ISI_CTRL_DIS
) {
207 complete(&isi
->complete
);
208 isi_writel(isi
, ISI_INTDIS
, ISI_CTRL_DIS
);
211 if ((pending
& ISI_SR_VSYNC
) &&
212 (isi
->state
== ISI_STATE_IDLE
)) {
213 isi
->state
= ISI_STATE_READY
;
214 wake_up_interruptible(&isi
->vsync_wq
);
217 if (likely(pending
& ISI_SR_CXFR_DONE
))
218 ret
= atmel_isi_handle_streaming(isi
);
221 spin_unlock(&isi
->lock
);
225 #define WAIT_ISI_RESET 1
226 #define WAIT_ISI_DISABLE 0
227 static int atmel_isi_wait_status(struct atmel_isi
*isi
, int wait_reset
)
229 unsigned long timeout
;
231 * The reset or disable will only succeed if we have a
232 * pixel clock from the camera.
234 init_completion(&isi
->complete
);
237 isi_writel(isi
, ISI_INTEN
, ISI_CTRL_SRST
);
238 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_SRST
);
240 isi_writel(isi
, ISI_INTEN
, ISI_CTRL_DIS
);
241 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
244 timeout
= wait_for_completion_timeout(&isi
->complete
,
245 msecs_to_jiffies(100));
252 /* ------------------------------------------------------------------
254 ------------------------------------------------------------------*/
255 static int queue_setup(struct vb2_queue
*vq
, const struct v4l2_format
*fmt
,
256 unsigned int *nbuffers
, unsigned int *nplanes
,
257 unsigned int sizes
[], void *alloc_ctxs
[])
259 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
260 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
261 struct atmel_isi
*isi
= ici
->priv
;
266 ret
= atmel_isi_wait_status(isi
, WAIT_ISI_RESET
);
268 dev_err(icd
->parent
, "Reset ISI timed out\n");
271 /* Disable all interrupts */
272 isi_writel(isi
, ISI_INTDIS
, ~0UL);
274 size
= icd
->sizeimage
;
276 if (!*nbuffers
|| *nbuffers
> MAX_BUFFER_NUM
)
277 *nbuffers
= MAX_BUFFER_NUM
;
279 if (size
* *nbuffers
> VID_LIMIT_BYTES
)
280 *nbuffers
= VID_LIMIT_BYTES
/ size
;
284 alloc_ctxs
[0] = isi
->alloc_ctx
;
289 dev_dbg(icd
->parent
, "%s, count=%d, size=%ld\n", __func__
,
295 static int buffer_init(struct vb2_buffer
*vb
)
297 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
299 buf
->p_dma_desc
= NULL
;
300 INIT_LIST_HEAD(&buf
->list
);
305 static int buffer_prepare(struct vb2_buffer
*vb
)
307 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
308 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
309 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
310 struct atmel_isi
*isi
= ici
->priv
;
312 struct isi_dma_desc
*desc
;
314 size
= icd
->sizeimage
;
316 if (vb2_plane_size(vb
, 0) < size
) {
317 dev_err(icd
->parent
, "%s data will not fit into plane (%lu < %lu)\n",
318 __func__
, vb2_plane_size(vb
, 0), size
);
322 vb2_set_plane_payload(&buf
->vb
, 0, size
);
324 if (!buf
->p_dma_desc
) {
325 if (list_empty(&isi
->dma_desc_head
)) {
326 dev_err(icd
->parent
, "Not enough dma descriptors.\n");
329 /* Get an available descriptor */
330 desc
= list_entry(isi
->dma_desc_head
.next
,
331 struct isi_dma_desc
, list
);
332 /* Delete the descriptor since now it is used */
333 list_del_init(&desc
->list
);
335 /* Initialize the dma descriptor */
336 desc
->p_fbd
->fb_address
=
337 vb2_dma_contig_plane_dma_addr(vb
, 0);
338 desc
->p_fbd
->next_fbd_address
= 0;
339 set_dma_ctrl(desc
->p_fbd
, ISI_DMA_CTRL_WB
);
341 buf
->p_dma_desc
= desc
;
347 static void buffer_cleanup(struct vb2_buffer
*vb
)
349 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
350 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
351 struct atmel_isi
*isi
= ici
->priv
;
352 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
354 /* This descriptor is available now and we add to head list */
356 list_add(&buf
->p_dma_desc
->list
, &isi
->dma_desc_head
);
359 static void start_dma(struct atmel_isi
*isi
, struct frame_buffer
*buffer
)
363 cfg1
= isi_readl(isi
, ISI_CFG1
);
364 /* Enable irq: cxfr for the codec path, pxfr for the preview path */
365 isi_writel(isi
, ISI_INTEN
,
366 ISI_SR_CXFR_DONE
| ISI_SR_PXFR_DONE
);
368 /* Check if already in a frame */
369 if (isi_readl(isi
, ISI_STATUS
) & ISI_CTRL_CDC
) {
370 dev_err(isi
->icd
->parent
, "Already in frame handling.\n");
374 isi_writel(isi
, ISI_DMA_C_DSCR
, buffer
->p_dma_desc
->fbd_phys
);
375 isi_writel(isi
, ISI_DMA_C_CTRL
, ISI_DMA_CTRL_FETCH
| ISI_DMA_CTRL_DONE
);
376 isi_writel(isi
, ISI_DMA_CHER
, ISI_DMA_CHSR_C_CH
);
378 /* Enable linked list */
379 cfg1
|= isi
->pdata
->frate
| ISI_CFG1_DISCR
;
381 /* Enable codec path and ISI */
382 ctrl
= ISI_CTRL_CDC
| ISI_CTRL_EN
;
383 isi_writel(isi
, ISI_CTRL
, ctrl
);
384 isi_writel(isi
, ISI_CFG1
, cfg1
);
387 static void buffer_queue(struct vb2_buffer
*vb
)
389 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vb
->vb2_queue
);
390 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
391 struct atmel_isi
*isi
= ici
->priv
;
392 struct frame_buffer
*buf
= container_of(vb
, struct frame_buffer
, vb
);
393 unsigned long flags
= 0;
395 spin_lock_irqsave(&isi
->lock
, flags
);
396 list_add_tail(&buf
->list
, &isi
->video_buffer_list
);
398 if (isi
->active
== NULL
) {
400 if (vb2_is_streaming(vb
->vb2_queue
))
403 spin_unlock_irqrestore(&isi
->lock
, flags
);
406 static int start_streaming(struct vb2_queue
*vq
, unsigned int count
)
408 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
409 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
410 struct atmel_isi
*isi
= ici
->priv
;
415 spin_lock_irq(&isi
->lock
);
416 isi
->state
= ISI_STATE_IDLE
;
417 /* Clear any pending SOF interrupt */
418 sr
= isi_readl(isi
, ISI_STATUS
);
419 /* Enable VSYNC interrupt for SOF */
420 isi_writel(isi
, ISI_INTEN
, ISI_SR_VSYNC
);
421 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_EN
);
422 spin_unlock_irq(&isi
->lock
);
424 dev_dbg(icd
->parent
, "Waiting for SOF\n");
425 ret
= wait_event_interruptible(isi
->vsync_wq
,
426 isi
->state
!= ISI_STATE_IDLE
);
430 if (isi
->state
!= ISI_STATE_READY
) {
435 spin_lock_irq(&isi
->lock
);
436 isi
->state
= ISI_STATE_WAIT_SOF
;
437 isi_writel(isi
, ISI_INTDIS
, ISI_SR_VSYNC
);
439 start_dma(isi
, isi
->active
);
440 spin_unlock_irq(&isi
->lock
);
446 INIT_LIST_HEAD(&isi
->video_buffer_list
);
450 /* abort streaming and wait for last buffer */
451 static int stop_streaming(struct vb2_queue
*vq
)
453 struct soc_camera_device
*icd
= soc_camera_from_vb2q(vq
);
454 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
455 struct atmel_isi
*isi
= ici
->priv
;
456 struct frame_buffer
*buf
, *node
;
458 unsigned long timeout
;
460 spin_lock_irq(&isi
->lock
);
462 /* Release all active buffers */
463 list_for_each_entry_safe(buf
, node
, &isi
->video_buffer_list
, list
) {
464 list_del_init(&buf
->list
);
465 vb2_buffer_done(&buf
->vb
, VB2_BUF_STATE_ERROR
);
467 spin_unlock_irq(&isi
->lock
);
469 timeout
= jiffies
+ FRAME_INTERVAL_MILLI_SEC
* HZ
;
470 /* Wait until the end of the current frame. */
471 while ((isi_readl(isi
, ISI_STATUS
) & ISI_CTRL_CDC
) &&
472 time_before(jiffies
, timeout
))
475 if (time_after(jiffies
, timeout
)) {
477 "Timeout waiting for finishing codec request\n");
481 /* Disable interrupts */
482 isi_writel(isi
, ISI_INTDIS
,
483 ISI_SR_CXFR_DONE
| ISI_SR_PXFR_DONE
);
485 /* Disable ISI and wait for it is done */
486 ret
= atmel_isi_wait_status(isi
, WAIT_ISI_DISABLE
);
488 dev_err(icd
->parent
, "Disable ISI timed out\n");
493 static struct vb2_ops isi_video_qops
= {
494 .queue_setup
= queue_setup
,
495 .buf_init
= buffer_init
,
496 .buf_prepare
= buffer_prepare
,
497 .buf_cleanup
= buffer_cleanup
,
498 .buf_queue
= buffer_queue
,
499 .start_streaming
= start_streaming
,
500 .stop_streaming
= stop_streaming
,
501 .wait_prepare
= soc_camera_unlock
,
502 .wait_finish
= soc_camera_lock
,
505 /* ------------------------------------------------------------------
506 SOC camera operations for the device
507 ------------------------------------------------------------------*/
508 static int isi_camera_init_videobuf(struct vb2_queue
*q
,
509 struct soc_camera_device
*icd
)
511 q
->type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
512 q
->io_modes
= VB2_MMAP
;
514 q
->buf_struct_size
= sizeof(struct frame_buffer
);
515 q
->ops
= &isi_video_qops
;
516 q
->mem_ops
= &vb2_dma_contig_memops
;
518 return vb2_queue_init(q
);
521 static int isi_camera_set_fmt(struct soc_camera_device
*icd
,
522 struct v4l2_format
*f
)
524 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
525 struct atmel_isi
*isi
= ici
->priv
;
526 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
527 const struct soc_camera_format_xlate
*xlate
;
528 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
529 struct v4l2_mbus_framefmt mf
;
532 xlate
= soc_camera_xlate_by_fourcc(icd
, pix
->pixelformat
);
534 dev_warn(icd
->parent
, "Format %x not found\n",
539 dev_dbg(icd
->parent
, "Plan to set format %dx%d\n",
540 pix
->width
, pix
->height
);
542 mf
.width
= pix
->width
;
543 mf
.height
= pix
->height
;
544 mf
.field
= pix
->field
;
545 mf
.colorspace
= pix
->colorspace
;
546 mf
.code
= xlate
->code
;
548 ret
= v4l2_subdev_call(sd
, video
, s_mbus_fmt
, &mf
);
552 if (mf
.code
!= xlate
->code
)
555 ret
= configure_geometry(isi
, pix
->width
, pix
->height
, xlate
->code
);
559 pix
->width
= mf
.width
;
560 pix
->height
= mf
.height
;
561 pix
->field
= mf
.field
;
562 pix
->colorspace
= mf
.colorspace
;
563 icd
->current_fmt
= xlate
;
565 dev_dbg(icd
->parent
, "Finally set format %dx%d\n",
566 pix
->width
, pix
->height
);
571 static int isi_camera_try_fmt(struct soc_camera_device
*icd
,
572 struct v4l2_format
*f
)
574 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
575 const struct soc_camera_format_xlate
*xlate
;
576 struct v4l2_pix_format
*pix
= &f
->fmt
.pix
;
577 struct v4l2_mbus_framefmt mf
;
578 u32 pixfmt
= pix
->pixelformat
;
581 xlate
= soc_camera_xlate_by_fourcc(icd
, pixfmt
);
582 if (pixfmt
&& !xlate
) {
583 dev_warn(icd
->parent
, "Format %x not found\n", pixfmt
);
587 /* limit to Atmel ISI hardware capabilities */
588 if (pix
->height
> MAX_SUPPORT_HEIGHT
)
589 pix
->height
= MAX_SUPPORT_HEIGHT
;
590 if (pix
->width
> MAX_SUPPORT_WIDTH
)
591 pix
->width
= MAX_SUPPORT_WIDTH
;
593 /* limit to sensor capabilities */
594 mf
.width
= pix
->width
;
595 mf
.height
= pix
->height
;
596 mf
.field
= pix
->field
;
597 mf
.colorspace
= pix
->colorspace
;
598 mf
.code
= xlate
->code
;
600 ret
= v4l2_subdev_call(sd
, video
, try_mbus_fmt
, &mf
);
604 pix
->width
= mf
.width
;
605 pix
->height
= mf
.height
;
606 pix
->colorspace
= mf
.colorspace
;
610 pix
->field
= V4L2_FIELD_NONE
;
612 case V4L2_FIELD_NONE
:
615 dev_err(icd
->parent
, "Field type %d unsupported.\n",
623 static const struct soc_mbus_pixelfmt isi_camera_formats
[] = {
625 .fourcc
= V4L2_PIX_FMT_YUYV
,
626 .name
= "Packed YUV422 16 bit",
627 .bits_per_sample
= 8,
628 .packing
= SOC_MBUS_PACKING_2X8_PADHI
,
629 .order
= SOC_MBUS_ORDER_LE
,
630 .layout
= SOC_MBUS_LAYOUT_PACKED
,
634 /* This will be corrected as we get more formats */
635 static bool isi_camera_packing_supported(const struct soc_mbus_pixelfmt
*fmt
)
637 return fmt
->packing
== SOC_MBUS_PACKING_NONE
||
638 (fmt
->bits_per_sample
== 8 &&
639 fmt
->packing
== SOC_MBUS_PACKING_2X8_PADHI
) ||
640 (fmt
->bits_per_sample
> 8 &&
641 fmt
->packing
== SOC_MBUS_PACKING_EXTEND16
);
644 #define ISI_BUS_PARAM (V4L2_MBUS_MASTER | \
645 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
646 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
647 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
648 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
649 V4L2_MBUS_PCLK_SAMPLE_RISING | \
650 V4L2_MBUS_PCLK_SAMPLE_FALLING | \
651 V4L2_MBUS_DATA_ACTIVE_HIGH)
653 static int isi_camera_try_bus_param(struct soc_camera_device
*icd
,
654 unsigned char buswidth
)
656 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
657 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
658 struct atmel_isi
*isi
= ici
->priv
;
659 struct v4l2_mbus_config cfg
= {.type
= V4L2_MBUS_PARALLEL
,};
660 unsigned long common_flags
;
663 ret
= v4l2_subdev_call(sd
, video
, g_mbus_config
, &cfg
);
665 common_flags
= soc_mbus_config_compatible(&cfg
,
668 dev_warn(icd
->parent
,
669 "Flags incompatible: camera 0x%x, host 0x%x\n",
670 cfg
.flags
, ISI_BUS_PARAM
);
673 } else if (ret
!= -ENOIOCTLCMD
) {
677 if ((1 << (buswidth
- 1)) & isi
->width_flags
)
683 static int isi_camera_get_formats(struct soc_camera_device
*icd
,
685 struct soc_camera_format_xlate
*xlate
)
687 struct v4l2_subdev
*sd
= soc_camera_to_subdev(icd
);
688 int formats
= 0, ret
;
690 enum v4l2_mbus_pixelcode code
;
691 /* soc camera host format */
692 const struct soc_mbus_pixelfmt
*fmt
;
694 ret
= v4l2_subdev_call(sd
, video
, enum_mbus_fmt
, idx
, &code
);
696 /* No more formats */
699 fmt
= soc_mbus_get_fmtdesc(code
);
702 "Invalid format code #%u: %d\n", idx
, code
);
706 /* This also checks support for the requested bits-per-sample */
707 ret
= isi_camera_try_bus_param(icd
, fmt
->bits_per_sample
);
710 "Fail to try the bus parameters.\n");
715 case V4L2_MBUS_FMT_UYVY8_2X8
:
716 case V4L2_MBUS_FMT_VYUY8_2X8
:
717 case V4L2_MBUS_FMT_YUYV8_2X8
:
718 case V4L2_MBUS_FMT_YVYU8_2X8
:
721 xlate
->host_fmt
= &isi_camera_formats
[0];
724 dev_dbg(icd
->parent
, "Providing format %s using code %d\n",
725 isi_camera_formats
[0].name
, code
);
729 if (!isi_camera_packing_supported(fmt
))
733 "Providing format %s in pass-through mode\n",
737 /* Generic pass-through */
740 xlate
->host_fmt
= fmt
;
748 /* Called with .video_lock held */
749 static int isi_camera_add_device(struct soc_camera_device
*icd
)
751 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
752 struct atmel_isi
*isi
= ici
->priv
;
758 ret
= clk_enable(isi
->pclk
);
762 ret
= clk_enable(isi
->mck
);
764 clk_disable(isi
->pclk
);
769 dev_dbg(icd
->parent
, "Atmel ISI Camera driver attached to camera %d\n",
773 /* Called with .video_lock held */
774 static void isi_camera_remove_device(struct soc_camera_device
*icd
)
776 struct soc_camera_host
*ici
= to_soc_camera_host(icd
->parent
);
777 struct atmel_isi
*isi
= ici
->priv
;
779 BUG_ON(icd
!= isi
->icd
);
781 clk_disable(isi
->mck
);
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
)
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
->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
);
915 clk_unprepare(isi
->mck
);
917 clk_unprepare(isi
->pclk
);
924 static int __devinit
atmel_isi_probe(struct platform_device
*pdev
)
927 struct atmel_isi
*isi
;
929 struct resource
*regs
;
931 struct device
*dev
= &pdev
->dev
;
932 struct soc_camera_host
*soc_host
;
933 struct isi_platform_data
*pdata
;
935 pdata
= dev
->platform_data
;
936 if (!pdata
|| !pdata
->data_width_flags
|| !pdata
->mck_hz
) {
938 "No config available for Atmel ISI\n");
942 regs
= platform_get_resource(pdev
, IORESOURCE_MEM
, 0);
946 pclk
= clk_get(&pdev
->dev
, "isi_clk");
948 return PTR_ERR(pclk
);
950 ret
= clk_prepare(pclk
);
952 goto err_clk_prepare_pclk
;
954 isi
= kzalloc(sizeof(struct atmel_isi
), GFP_KERNEL
);
957 dev_err(&pdev
->dev
, "Can't allocate interface!\n");
964 spin_lock_init(&isi
->lock
);
965 init_waitqueue_head(&isi
->vsync_wq
);
966 INIT_LIST_HEAD(&isi
->video_buffer_list
);
967 INIT_LIST_HEAD(&isi
->dma_desc_head
);
969 /* Get ISI_MCK, provided by programmable clock or external clock */
970 isi
->mck
= clk_get(dev
, "isi_mck");
971 if (IS_ERR(isi
->mck
)) {
972 dev_err(dev
, "Failed to get isi_mck\n");
973 ret
= PTR_ERR(isi
->mck
);
977 ret
= clk_prepare(isi
->mck
);
979 goto err_clk_prepare_mck
;
981 /* Set ISI_MCK's frequency, it should be faster than pixel clock */
982 ret
= clk_set_rate(isi
->mck
, pdata
->mck_hz
);
984 goto err_set_mck_rate
;
986 isi
->p_fb_descriptors
= dma_alloc_coherent(&pdev
->dev
,
987 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
988 &isi
->fb_descriptors_phys
,
990 if (!isi
->p_fb_descriptors
) {
992 dev_err(&pdev
->dev
, "Can't allocate descriptors!\n");
993 goto err_alloc_descriptors
;
996 for (i
= 0; i
< MAX_BUFFER_NUM
; i
++) {
997 isi
->dma_desc
[i
].p_fbd
= isi
->p_fb_descriptors
+ i
;
998 isi
->dma_desc
[i
].fbd_phys
= isi
->fb_descriptors_phys
+
999 i
* sizeof(struct fbd
);
1000 list_add(&isi
->dma_desc
[i
].list
, &isi
->dma_desc_head
);
1003 isi
->alloc_ctx
= vb2_dma_contig_init_ctx(&pdev
->dev
);
1004 if (IS_ERR(isi
->alloc_ctx
)) {
1005 ret
= PTR_ERR(isi
->alloc_ctx
);
1009 isi
->regs
= ioremap(regs
->start
, resource_size(regs
));
1015 if (pdata
->data_width_flags
& ISI_DATAWIDTH_8
)
1016 isi
->width_flags
= 1 << 7;
1017 if (pdata
->data_width_flags
& ISI_DATAWIDTH_10
)
1018 isi
->width_flags
|= 1 << 9;
1020 isi_writel(isi
, ISI_CTRL
, ISI_CTRL_DIS
);
1022 irq
= platform_get_irq(pdev
, 0);
1028 ret
= request_irq(irq
, isi_interrupt
, 0, "isi", isi
);
1030 dev_err(&pdev
->dev
, "Unable to request irq %d\n", irq
);
1035 soc_host
= &isi
->soc_host
;
1036 soc_host
->drv_name
= "isi-camera";
1037 soc_host
->ops
= &isi_soc_camera_host_ops
;
1038 soc_host
->priv
= isi
;
1039 soc_host
->v4l2_dev
.dev
= &pdev
->dev
;
1040 soc_host
->nr
= pdev
->id
;
1042 ret
= soc_camera_host_register(soc_host
);
1044 dev_err(&pdev
->dev
, "Unable to register soc camera host\n");
1045 goto err_register_soc_camera_host
;
1049 err_register_soc_camera_host
:
1050 free_irq(isi
->irq
, isi
);
1054 vb2_dma_contig_cleanup_ctx(isi
->alloc_ctx
);
1056 dma_free_coherent(&pdev
->dev
,
1057 sizeof(struct fbd
) * MAX_BUFFER_NUM
,
1058 isi
->p_fb_descriptors
,
1059 isi
->fb_descriptors_phys
);
1060 err_alloc_descriptors
:
1062 clk_unprepare(isi
->mck
);
1063 err_clk_prepare_mck
:
1068 clk_unprepare(pclk
);
1069 err_clk_prepare_pclk
:
1075 static struct platform_driver atmel_isi_driver
= {
1076 .probe
= atmel_isi_probe
,
1077 .remove
= __devexit_p(atmel_isi_remove
),
1079 .name
= "atmel_isi",
1080 .owner
= THIS_MODULE
,
1084 static int __init
atmel_isi_init_module(void)
1086 return platform_driver_probe(&atmel_isi_driver
, &atmel_isi_probe
);
1089 static void __exit
atmel_isi_exit(void)
1091 platform_driver_unregister(&atmel_isi_driver
);
1093 module_init(atmel_isi_init_module
);
1094 module_exit(atmel_isi_exit
);
1096 MODULE_AUTHOR("Josh Wu <josh.wu@atmel.com>");
1097 MODULE_DESCRIPTION("The V4L2 driver for Atmel Linux");
1098 MODULE_LICENSE("GPL");
1099 MODULE_SUPPORTED_DEVICE("video");