2 * This is the driver for the STA2x11 Video Input Port.
4 * Copyright (C) 2012 ST Microelectronics
5 * author: Federico Vaga <federico.vaga@gmail.com>
6 * Copyright (C) 2010 WindRiver Systems, Inc.
7 * authors: Andreas Kies <andreas.kies@windriver.com>
8 * Vlad Lungu <vlad.lungu@windriver.com>
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms and conditions of the GNU General Public License,
12 * version 2, as published by the Free Software Foundation.
14 * This program is distributed in the hope it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
19 * You should have received a copy of the GNU General Public License along with
20 * this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
23 * The full GNU General Public License is included in this distribution in
24 * the file called "COPYING".
28 #include <linux/types.h>
29 #include <linux/kernel.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/videodev2.h>
33 #include <linux/kmod.h>
34 #include <linux/pci.h>
35 #include <linux/interrupt.h>
37 #include <linux/gpio.h>
38 #include <linux/i2c.h>
39 #include <linux/delay.h>
40 #include <media/v4l2-common.h>
41 #include <media/v4l2-device.h>
42 #include <media/v4l2-ctrls.h>
43 #include <media/v4l2-ioctl.h>
44 #include <media/v4l2-fh.h>
45 #include <media/v4l2-event.h>
46 #include <media/videobuf2-dma-contig.h>
48 #include "sta2x11_vip.h"
50 #define DRV_VERSION "1.3"
52 #ifndef PCI_DEVICE_ID_STMICRO_VIP
53 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D
70 #define DVP_HLFLN 0xA8
75 #define DVP_CTL_ENA 0x00000001
76 #define DVP_CTL_RST 0x80000000
77 #define DVP_CTL_DIS (~0x00040001)
79 #define DVP_IT_VSB 0x00000008
80 #define DVP_IT_VST 0x00000010
81 #define DVP_IT_FIFO 0x00000020
83 #define DVP_HLFLN_SD 0x00000001
92 struct list_head list
;
95 static inline struct vip_buffer
*to_vip_buffer(struct vb2_buffer
*vb2
)
97 return container_of(vb2
, struct vip_buffer
, vb
);
101 * struct sta2x11_vip - All internal data for one instance of device
102 * @v4l2_dev: device registered in v4l layer
103 * @video_dev: properties of our device
105 * @adapter: contains I2C adapter information
106 * @register_save_area: All relevant register are saved here during suspend
107 * @decoder: contains information about video DAC
108 * @ctrl_hdl: handler for control framework
109 * @format: pixel format, fixed UYVY
110 * @std: video standard (e.g. PAL/NTSC)
111 * @input: input line for video signal ( 0 or 1 )
112 * @disabled: Device is in power down state
113 * @slock: for excluse acces of registers
114 * @alloc_ctx: context for videobuf2
115 * @vb_vidq: queue maintained by videobuf2 layer
116 * @buffer_list: list of buffer in use
117 * @sequence: sequence number of acquired buffer
118 * @active: current active buffer
119 * @lock: used in videobuf2 callback
120 * @tcount: Number of top frames
121 * @bcount: Number of bottom frames
122 * @overflow: Number of FIFO overflows
123 * @iomem: hardware base address
124 * @config: I2C and gpio config from platform
126 * All non-local data is accessed via this structure.
129 struct v4l2_device v4l2_dev
;
130 struct video_device video_dev
;
131 struct pci_dev
*pdev
;
132 struct i2c_adapter
*adapter
;
133 unsigned int register_save_area
[IRQ_COUNT
+ SAVE_COUNT
+ AUX_COUNT
];
134 struct v4l2_subdev
*decoder
;
135 struct v4l2_ctrl_handler ctrl_hdl
;
138 struct v4l2_pix_format format
;
144 struct vb2_alloc_ctx
*alloc_ctx
;
145 struct vb2_queue vb_vidq
;
146 struct list_head buffer_list
;
147 unsigned int sequence
;
148 struct vip_buffer
*active
; /* current active buffer */
149 spinlock_t lock
; /* Used in videobuf2 callback */
151 /* Interrupt counters */
155 void __iomem
*iomem
; /* I/O Memory */
156 struct vip_config
*config
;
159 static const unsigned int registers_to_save
[AUX_COUNT
] = {
160 DVP_HLFLN
, DVP_RGB
, DVP_PKZ
163 static struct v4l2_pix_format formats_50
[] = {
164 { /*PAL interlaced */
167 .pixelformat
= V4L2_PIX_FMT_UYVY
,
168 .field
= V4L2_FIELD_INTERLACED
,
169 .bytesperline
= 720 * 2,
170 .sizeimage
= 720 * 2 * 576,
171 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
175 .pixelformat
= V4L2_PIX_FMT_UYVY
,
176 .field
= V4L2_FIELD_TOP
,
177 .bytesperline
= 720 * 2,
178 .sizeimage
= 720 * 2 * 288,
179 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
183 .pixelformat
= V4L2_PIX_FMT_UYVY
,
184 .field
= V4L2_FIELD_BOTTOM
,
185 .bytesperline
= 720 * 2,
186 .sizeimage
= 720 * 2 * 288,
187 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
191 static struct v4l2_pix_format formats_60
[] = {
192 { /*NTSC interlaced */
195 .pixelformat
= V4L2_PIX_FMT_UYVY
,
196 .field
= V4L2_FIELD_INTERLACED
,
197 .bytesperline
= 720 * 2,
198 .sizeimage
= 720 * 2 * 480,
199 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
203 .pixelformat
= V4L2_PIX_FMT_UYVY
,
204 .field
= V4L2_FIELD_TOP
,
205 .bytesperline
= 720 * 2,
206 .sizeimage
= 720 * 2 * 240,
207 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
211 .pixelformat
= V4L2_PIX_FMT_UYVY
,
212 .field
= V4L2_FIELD_BOTTOM
,
213 .bytesperline
= 720 * 2,
214 .sizeimage
= 720 * 2 * 240,
215 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
218 /* Write VIP register */
219 static inline void reg_write(struct sta2x11_vip
*vip
, unsigned int reg
, u32 val
)
221 iowrite32((val
), (vip
->iomem
)+(reg
));
223 /* Read VIP register */
224 static inline u32
reg_read(struct sta2x11_vip
*vip
, unsigned int reg
)
226 return ioread32((vip
->iomem
)+(reg
));
228 /* Start DMA acquisition */
229 static void start_dma(struct sta2x11_vip
*vip
, struct vip_buffer
*vip_buf
)
231 unsigned long offset
= 0;
233 if (vip
->format
.field
== V4L2_FIELD_INTERLACED
)
234 offset
= vip
->format
.width
* 2;
236 spin_lock_irq(&vip
->slock
);
237 /* Enable acquisition */
238 reg_write(vip
, DVP_CTL
, reg_read(vip
, DVP_CTL
) | DVP_CTL_ENA
);
239 /* Set Top and Bottom Field memory address */
240 reg_write(vip
, DVP_VTP
, (u32
)vip_buf
->dma
);
241 reg_write(vip
, DVP_VBP
, (u32
)vip_buf
->dma
+ offset
);
242 spin_unlock_irq(&vip
->slock
);
245 /* Fetch the next buffer to activate */
246 static void vip_active_buf_next(struct sta2x11_vip
*vip
)
248 /* Get the next buffer */
249 spin_lock(&vip
->lock
);
250 if (list_empty(&vip
->buffer_list
)) {/* No available buffer */
251 spin_unlock(&vip
->lock
);
254 vip
->active
= list_first_entry(&vip
->buffer_list
,
257 /* Reset Top and Bottom counter */
260 spin_unlock(&vip
->lock
);
261 if (vb2_is_streaming(&vip
->vb_vidq
)) { /* streaming is on */
262 start_dma(vip
, vip
->active
); /* start dma capture */
267 /* Videobuf2 Operations */
268 static int queue_setup(struct vb2_queue
*vq
, const struct v4l2_format
*fmt
,
269 unsigned int *nbuffers
, unsigned int *nplanes
,
270 unsigned int sizes
[], void *alloc_ctxs
[])
272 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vq
);
274 if (!(*nbuffers
) || *nbuffers
< MAX_FRAMES
)
275 *nbuffers
= MAX_FRAMES
;
278 sizes
[0] = vip
->format
.sizeimage
;
279 alloc_ctxs
[0] = vip
->alloc_ctx
;
288 static int buffer_init(struct vb2_buffer
*vb
)
290 struct vip_buffer
*vip_buf
= to_vip_buffer(vb
);
292 vip_buf
->dma
= vb2_dma_contig_plane_dma_addr(vb
, 0);
293 INIT_LIST_HEAD(&vip_buf
->list
);
297 static int buffer_prepare(struct vb2_buffer
*vb
)
299 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vb
->vb2_queue
);
300 struct vip_buffer
*vip_buf
= to_vip_buffer(vb
);
303 size
= vip
->format
.sizeimage
;
304 if (vb2_plane_size(vb
, 0) < size
) {
305 v4l2_err(&vip
->v4l2_dev
, "buffer too small (%lu < %lu)\n",
306 vb2_plane_size(vb
, 0), size
);
310 vb2_set_plane_payload(&vip_buf
->vb
, 0, size
);
314 static void buffer_queue(struct vb2_buffer
*vb
)
316 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vb
->vb2_queue
);
317 struct vip_buffer
*vip_buf
= to_vip_buffer(vb
);
319 spin_lock(&vip
->lock
);
320 list_add_tail(&vip_buf
->list
, &vip
->buffer_list
);
321 if (!vip
->active
) { /* No active buffer, active the first one */
322 vip
->active
= list_first_entry(&vip
->buffer_list
,
325 if (vb2_is_streaming(&vip
->vb_vidq
)) /* streaming is on */
326 start_dma(vip
, vip_buf
); /* start dma capture */
328 spin_unlock(&vip
->lock
);
330 static void buffer_finish(struct vb2_buffer
*vb
)
332 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vb
->vb2_queue
);
333 struct vip_buffer
*vip_buf
= to_vip_buffer(vb
);
335 /* Buffer handled, remove it from the list */
336 spin_lock(&vip
->lock
);
337 list_del_init(&vip_buf
->list
);
338 spin_unlock(&vip
->lock
);
340 if (vb2_is_streaming(vb
->vb2_queue
))
341 vip_active_buf_next(vip
);
344 static int start_streaming(struct vb2_queue
*vq
, unsigned int count
)
346 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vq
);
348 spin_lock_irq(&vip
->slock
);
349 /* Enable interrupt VSYNC Top and Bottom*/
350 reg_write(vip
, DVP_ITM
, DVP_IT_VSB
| DVP_IT_VST
);
351 spin_unlock_irq(&vip
->slock
);
354 start_dma(vip
, vip
->active
);
359 /* abort streaming and wait for last buffer */
360 static void stop_streaming(struct vb2_queue
*vq
)
362 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vq
);
363 struct vip_buffer
*vip_buf
, *node
;
365 /* Disable acquisition */
366 reg_write(vip
, DVP_CTL
, reg_read(vip
, DVP_CTL
) & ~DVP_CTL_ENA
);
367 /* Disable all interrupts */
368 reg_write(vip
, DVP_ITM
, 0);
370 /* Release all active buffers */
371 spin_lock(&vip
->lock
);
372 list_for_each_entry_safe(vip_buf
, node
, &vip
->buffer_list
, list
) {
373 vb2_buffer_done(&vip_buf
->vb
, VB2_BUF_STATE_ERROR
);
374 list_del(&vip_buf
->list
);
376 spin_unlock(&vip
->lock
);
379 static struct vb2_ops vip_video_qops
= {
380 .queue_setup
= queue_setup
,
381 .buf_init
= buffer_init
,
382 .buf_prepare
= buffer_prepare
,
383 .buf_finish
= buffer_finish
,
384 .buf_queue
= buffer_queue
,
385 .start_streaming
= start_streaming
,
386 .stop_streaming
= stop_streaming
,
390 /* File Operations */
391 static const struct v4l2_file_operations vip_fops
= {
392 .owner
= THIS_MODULE
,
393 .open
= v4l2_fh_open
,
394 .release
= vb2_fop_release
,
395 .unlocked_ioctl
= video_ioctl2
,
396 .read
= vb2_fop_read
,
397 .mmap
= vb2_fop_mmap
,
403 * vidioc_querycap - return capabilities of device
404 * @file: descriptor of device
405 * @cap: contains return values
407 * the capabilities of the device are returned
409 * return value: 0, no error.
411 static int vidioc_querycap(struct file
*file
, void *priv
,
412 struct v4l2_capability
*cap
)
414 struct sta2x11_vip
*vip
= video_drvdata(file
);
416 strcpy(cap
->driver
, KBUILD_MODNAME
);
417 strcpy(cap
->card
, KBUILD_MODNAME
);
418 snprintf(cap
->bus_info
, sizeof(cap
->bus_info
), "PCI:%s",
419 pci_name(vip
->pdev
));
420 cap
->device_caps
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_READWRITE
|
422 cap
->capabilities
= cap
->device_caps
| V4L2_CAP_DEVICE_CAPS
;
428 * vidioc_s_std - set video standard
429 * @file: descriptor of device
430 * @std: contains standard to be set
432 * the video standard is set
434 * return value: 0, no error.
436 * -EIO, no input signal detected
438 * other, returned from video DAC.
440 static int vidioc_s_std(struct file
*file
, void *priv
, v4l2_std_id std
)
442 struct sta2x11_vip
*vip
= video_drvdata(file
);
443 v4l2_std_id oldstd
= vip
->std
, newstd
;
446 if (V4L2_STD_ALL
== std
) {
447 v4l2_subdev_call(vip
->decoder
, video
, s_std
, std
);
449 v4l2_subdev_call(vip
->decoder
, video
, querystd
, &newstd
);
450 v4l2_subdev_call(vip
->decoder
, video
, g_input_status
, &status
);
451 if (status
& V4L2_IN_ST_NO_SIGNAL
)
453 std
= vip
->std
= newstd
;
455 if (V4L2_STD_525_60
& std
)
456 vip
->format
= formats_60
[0];
458 vip
->format
= formats_50
[0];
464 if (V4L2_STD_525_60
& std
)
465 vip
->format
= formats_60
[0];
467 vip
->format
= formats_50
[0];
470 return v4l2_subdev_call(vip
->decoder
, video
, s_std
, std
);
474 * vidioc_g_std - get video standard
475 * @file: descriptor of device
476 * @std: contains return values
478 * the current video standard is returned
480 * return value: 0, no error.
482 static int vidioc_g_std(struct file
*file
, void *priv
, v4l2_std_id
*std
)
484 struct sta2x11_vip
*vip
= video_drvdata(file
);
491 * vidioc_querystd - get possible video standards
492 * @file: descriptor of device
493 * @std: contains return values
495 * all possible video standards are returned
497 * return value: delivered by video DAC routine.
499 static int vidioc_querystd(struct file
*file
, void *priv
, v4l2_std_id
*std
)
501 struct sta2x11_vip
*vip
= video_drvdata(file
);
503 return v4l2_subdev_call(vip
->decoder
, video
, querystd
, std
);
506 static int vidioc_enum_input(struct file
*file
, void *priv
,
507 struct v4l2_input
*inp
)
512 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
513 inp
->std
= V4L2_STD_ALL
;
514 sprintf(inp
->name
, "Camera %u", inp
->index
);
520 * vidioc_s_input - set input line
521 * @file: descriptor of device
522 * @i: new input line number
524 * the current active input line is set
526 * return value: 0, no error.
528 * -EINVAL, line number out of range
530 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
532 struct sta2x11_vip
*vip
= video_drvdata(file
);
537 ret
= v4l2_subdev_call(vip
->decoder
, video
, s_routing
, i
, 0, 0);
546 * vidioc_g_input - return input line
547 * @file: descriptor of device
548 * @i: returned input line number
550 * the current active input line is returned
552 * return value: always 0.
554 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
556 struct sta2x11_vip
*vip
= video_drvdata(file
);
563 * vidioc_enum_fmt_vid_cap - return video capture format
564 * @f: returned format information
566 * returns name and format of video capture
567 * Only UYVY is supported by hardware.
569 * return value: always 0.
571 static int vidioc_enum_fmt_vid_cap(struct file
*file
, void *priv
,
572 struct v4l2_fmtdesc
*f
)
578 strcpy(f
->description
, "4:2:2, packed, UYVY");
579 f
->pixelformat
= V4L2_PIX_FMT_UYVY
;
585 * vidioc_try_fmt_vid_cap - set video capture format
586 * @file: descriptor of device
589 * new video format is set which includes width and
590 * field type. width is fixed to 720, no scaling.
591 * Only UYVY is supported by this hardware.
592 * the minimum height is 200, the maximum is 576 (PAL)
594 * return value: 0, no error
596 * -EINVAL, pixel or field format not supported
599 static int vidioc_try_fmt_vid_cap(struct file
*file
, void *priv
,
600 struct v4l2_format
*f
)
602 struct sta2x11_vip
*vip
= video_drvdata(file
);
605 if (V4L2_PIX_FMT_UYVY
!= f
->fmt
.pix
.pixelformat
) {
606 v4l2_warn(&vip
->v4l2_dev
, "Invalid format, only UYVY supported\n");
610 if (V4L2_STD_525_60
& vip
->std
)
615 switch (f
->fmt
.pix
.field
) {
618 if (interlace_lim
< f
->fmt
.pix
.height
)
619 f
->fmt
.pix
.field
= V4L2_FIELD_INTERLACED
;
621 f
->fmt
.pix
.field
= V4L2_FIELD_BOTTOM
;
624 case V4L2_FIELD_BOTTOM
:
625 if (interlace_lim
< f
->fmt
.pix
.height
)
626 f
->fmt
.pix
.height
= interlace_lim
;
628 case V4L2_FIELD_INTERLACED
:
632 /* It is the only supported format */
633 f
->fmt
.pix
.pixelformat
= V4L2_PIX_FMT_UYVY
;
634 f
->fmt
.pix
.height
&= ~1;
635 if (2 * interlace_lim
< f
->fmt
.pix
.height
)
636 f
->fmt
.pix
.height
= 2 * interlace_lim
;
637 if (200 > f
->fmt
.pix
.height
)
638 f
->fmt
.pix
.height
= 200;
639 f
->fmt
.pix
.width
= 720;
640 f
->fmt
.pix
.bytesperline
= f
->fmt
.pix
.width
* 2;
641 f
->fmt
.pix
.sizeimage
= f
->fmt
.pix
.width
* 2 * f
->fmt
.pix
.height
;
642 f
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SMPTE170M
;
647 * vidioc_s_fmt_vid_cap - set current video format parameters
648 * @file: descriptor of device
649 * @f: returned format information
651 * set new capture format
652 * return value: 0, no error
654 * other, delivered by video DAC routine.
656 static int vidioc_s_fmt_vid_cap(struct file
*file
, void *priv
,
657 struct v4l2_format
*f
)
659 struct sta2x11_vip
*vip
= video_drvdata(file
);
660 unsigned int t_stop
, b_stop
, pitch
;
663 ret
= vidioc_try_fmt_vid_cap(file
, priv
, f
);
667 if (vb2_is_busy(&vip
->vb_vidq
)) {
668 /* Can't change format during acquisition */
669 v4l2_err(&vip
->v4l2_dev
, "device busy\n");
672 vip
->format
= f
->fmt
.pix
;
673 switch (vip
->format
.field
) {
674 case V4L2_FIELD_INTERLACED
:
675 t_stop
= ((vip
->format
.height
/ 2 - 1) << 16) |
676 (2 * vip
->format
.width
- 1);
678 pitch
= 4 * vip
->format
.width
;
681 t_stop
= ((vip
->format
.height
- 1) << 16) |
682 (2 * vip
->format
.width
- 1);
683 b_stop
= (0 << 16) | (2 * vip
->format
.width
- 1);
684 pitch
= 2 * vip
->format
.width
;
686 case V4L2_FIELD_BOTTOM
:
687 t_stop
= (0 << 16) | (2 * vip
->format
.width
- 1);
688 b_stop
= (vip
->format
.height
<< 16) |
689 (2 * vip
->format
.width
- 1);
690 pitch
= 2 * vip
->format
.width
;
693 v4l2_err(&vip
->v4l2_dev
, "unknown field format\n");
697 spin_lock_irq(&vip
->slock
);
698 /* Y-X Top Field Offset */
699 reg_write(vip
, DVP_TFO
, 0);
700 /* Y-X Bottom Field Offset */
701 reg_write(vip
, DVP_BFO
, 0);
702 /* Y-X Top Field Stop*/
703 reg_write(vip
, DVP_TFS
, t_stop
);
704 /* Y-X Bottom Field Stop */
705 reg_write(vip
, DVP_BFS
, b_stop
);
706 /* Video Memory Pitch */
707 reg_write(vip
, DVP_VMP
, pitch
);
708 spin_unlock_irq(&vip
->slock
);
714 * vidioc_g_fmt_vid_cap - get current video format parameters
715 * @file: descriptor of device
716 * @f: contains format information
718 * returns current video format parameters
720 * return value: 0, always successful
722 static int vidioc_g_fmt_vid_cap(struct file
*file
, void *priv
,
723 struct v4l2_format
*f
)
725 struct sta2x11_vip
*vip
= video_drvdata(file
);
727 f
->fmt
.pix
= vip
->format
;
732 static const struct v4l2_ioctl_ops vip_ioctl_ops
= {
733 .vidioc_querycap
= vidioc_querycap
,
735 .vidioc_enum_fmt_vid_cap
= vidioc_enum_fmt_vid_cap
,
736 .vidioc_g_fmt_vid_cap
= vidioc_g_fmt_vid_cap
,
737 .vidioc_s_fmt_vid_cap
= vidioc_s_fmt_vid_cap
,
738 .vidioc_try_fmt_vid_cap
= vidioc_try_fmt_vid_cap
,
739 /* Buffer handlers */
740 .vidioc_create_bufs
= vb2_ioctl_create_bufs
,
741 .vidioc_prepare_buf
= vb2_ioctl_prepare_buf
,
742 .vidioc_reqbufs
= vb2_ioctl_reqbufs
,
743 .vidioc_querybuf
= vb2_ioctl_querybuf
,
744 .vidioc_qbuf
= vb2_ioctl_qbuf
,
745 .vidioc_dqbuf
= vb2_ioctl_dqbuf
,
747 .vidioc_streamon
= vb2_ioctl_streamon
,
748 .vidioc_streamoff
= vb2_ioctl_streamoff
,
749 /* Standard handling */
750 .vidioc_g_std
= vidioc_g_std
,
751 .vidioc_s_std
= vidioc_s_std
,
752 .vidioc_querystd
= vidioc_querystd
,
754 .vidioc_enum_input
= vidioc_enum_input
,
755 .vidioc_g_input
= vidioc_g_input
,
756 .vidioc_s_input
= vidioc_s_input
,
757 /* Log status ioctl */
758 .vidioc_log_status
= v4l2_ctrl_log_status
,
760 .vidioc_subscribe_event
= v4l2_ctrl_subscribe_event
,
761 .vidioc_unsubscribe_event
= v4l2_event_unsubscribe
,
764 static struct video_device video_dev_template
= {
765 .name
= KBUILD_MODNAME
,
766 .release
= video_device_release_empty
,
768 .ioctl_ops
= &vip_ioctl_ops
,
769 .tvnorms
= V4L2_STD_ALL
,
773 * vip_irq - interrupt routine
774 * @irq: Number of interrupt ( not used, correct number is assumed )
775 * @vip: local data structure containing all information
777 * check for both frame interrupts set ( top and bottom ).
778 * check FIFO overflow, but limit number of log messages after open.
779 * signal a complete buffer if done
781 * return value: IRQ_NONE, interrupt was not generated by VIP
783 * IRQ_HANDLED, interrupt done.
785 static irqreturn_t
vip_irq(int irq
, struct sta2x11_vip
*vip
)
789 status
= reg_read(vip
, DVP_ITS
);
791 if (!status
) /* No interrupt to handle */
794 if (status
& DVP_IT_FIFO
)
795 if (vip
->overflow
++ > 5)
796 pr_info("VIP: fifo overflow\n");
798 if ((status
& DVP_IT_VST
) && (status
& DVP_IT_VSB
)) {
799 /* this is bad, we are too slow, hope the condition is gone
800 * on the next frame */
804 if (status
& DVP_IT_VST
)
805 if ((++vip
->tcount
) < 2)
807 if (status
& DVP_IT_VSB
) {
812 if (vip
->active
) { /* Acquisition is over on this buffer */
813 /* Disable acquisition */
814 reg_write(vip
, DVP_CTL
, reg_read(vip
, DVP_CTL
) & ~DVP_CTL_ENA
);
815 /* Remove the active buffer from the list */
816 v4l2_get_timestamp(&vip
->active
->vb
.v4l2_buf
.timestamp
);
817 vip
->active
->vb
.v4l2_buf
.sequence
= vip
->sequence
++;
818 vb2_buffer_done(&vip
->active
->vb
, VB2_BUF_STATE_DONE
);
824 static void sta2x11_vip_init_register(struct sta2x11_vip
*vip
)
826 /* Register initialization */
827 spin_lock_irq(&vip
->slock
);
828 /* Clean interrupt */
829 reg_read(vip
, DVP_ITS
);
830 /* Enable Half Line per vertical */
831 reg_write(vip
, DVP_HLFLN
, DVP_HLFLN_SD
);
832 /* Reset VIP control */
833 reg_write(vip
, DVP_CTL
, DVP_CTL_RST
);
834 /* Clear VIP control */
835 reg_write(vip
, DVP_CTL
, 0);
836 spin_unlock_irq(&vip
->slock
);
838 static void sta2x11_vip_clear_register(struct sta2x11_vip
*vip
)
840 spin_lock_irq(&vip
->slock
);
841 /* Disable interrupt */
842 reg_write(vip
, DVP_ITM
, 0);
843 /* Reset VIP Control */
844 reg_write(vip
, DVP_CTL
, DVP_CTL_RST
);
845 /* Clear VIP Control */
846 reg_write(vip
, DVP_CTL
, 0);
847 /* Clean VIP Interrupt */
848 reg_read(vip
, DVP_ITS
);
849 spin_unlock_irq(&vip
->slock
);
851 static int sta2x11_vip_init_buffer(struct sta2x11_vip
*vip
)
855 err
= dma_set_coherent_mask(&vip
->pdev
->dev
, DMA_BIT_MASK(29));
857 v4l2_err(&vip
->v4l2_dev
, "Cannot configure coherent mask");
860 memset(&vip
->vb_vidq
, 0, sizeof(struct vb2_queue
));
861 vip
->vb_vidq
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
862 vip
->vb_vidq
.io_modes
= VB2_MMAP
| VB2_READ
;
863 vip
->vb_vidq
.drv_priv
= vip
;
864 vip
->vb_vidq
.buf_struct_size
= sizeof(struct vip_buffer
);
865 vip
->vb_vidq
.ops
= &vip_video_qops
;
866 vip
->vb_vidq
.mem_ops
= &vb2_dma_contig_memops
;
867 vip
->vb_vidq
.timestamp_flags
= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
;
868 err
= vb2_queue_init(&vip
->vb_vidq
);
871 INIT_LIST_HEAD(&vip
->buffer_list
);
872 spin_lock_init(&vip
->lock
);
875 vip
->alloc_ctx
= vb2_dma_contig_init_ctx(&vip
->pdev
->dev
);
876 if (IS_ERR(vip
->alloc_ctx
)) {
877 v4l2_err(&vip
->v4l2_dev
, "Can't allocate buffer context");
878 return PTR_ERR(vip
->alloc_ctx
);
883 static void sta2x11_vip_release_buffer(struct sta2x11_vip
*vip
)
885 vb2_dma_contig_cleanup_ctx(vip
->alloc_ctx
);
887 static int sta2x11_vip_init_controls(struct sta2x11_vip
*vip
)
890 * Inititialize an empty control so VIP can inerithing controls
893 v4l2_ctrl_handler_init(&vip
->ctrl_hdl
, 0);
895 vip
->v4l2_dev
.ctrl_handler
= &vip
->ctrl_hdl
;
896 if (vip
->ctrl_hdl
.error
) {
897 int err
= vip
->ctrl_hdl
.error
;
899 v4l2_ctrl_handler_free(&vip
->ctrl_hdl
);
907 * vip_gpio_reserve - reserve gpio pin
909 * @pin: GPIO pin number
910 * @dir: direction, input or output
911 * @name: GPIO pin name
914 static int vip_gpio_reserve(struct device
*dev
, int pin
, int dir
,
922 ret
= gpio_request(pin
, name
);
924 dev_err(dev
, "Failed to allocate pin %d (%s)\n", pin
, name
);
928 ret
= gpio_direction_output(pin
, dir
);
930 dev_err(dev
, "Failed to set direction for pin %d (%s)\n",
936 ret
= gpio_export(pin
, false);
938 dev_err(dev
, "Failed to export pin %d (%s)\n", pin
, name
);
947 * vip_gpio_release - release gpio pin
949 * @pin: GPIO pin number
950 * @name: GPIO pin name
953 static void vip_gpio_release(struct device
*dev
, int pin
, const char *name
)
956 dev_dbg(dev
, "releasing pin %d (%s)\n", pin
, name
);
963 * sta2x11_vip_init_one - init one instance of video device
967 * allocate reset pins for DAC.
968 * Reset video DAC, this is done via reset line.
969 * allocate memory for managing device
973 * find and initialize video DAC
975 * return value: 0, no error
979 * -ENODEV, device could not be detected or registered
981 static int sta2x11_vip_init_one(struct pci_dev
*pdev
,
982 const struct pci_device_id
*ent
)
985 struct sta2x11_vip
*vip
;
986 struct vip_config
*config
;
988 /* Check if hardware support 26-bit DMA */
989 if (dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(26))) {
990 dev_err(&pdev
->dev
, "26-bit DMA addressing not available\n");
994 ret
= pci_enable_device(pdev
);
998 /* Get VIP platform data */
999 config
= dev_get_platdata(&pdev
->dev
);
1001 dev_info(&pdev
->dev
, "VIP slot disabled\n");
1006 /* Power configuration */
1007 ret
= vip_gpio_reserve(&pdev
->dev
, config
->pwr_pin
, 0,
1012 if (config
->reset_pin
>= 0) {
1013 ret
= vip_gpio_reserve(&pdev
->dev
, config
->reset_pin
, 0,
1014 config
->reset_name
);
1016 vip_gpio_release(&pdev
->dev
, config
->pwr_pin
,
1021 if (config
->pwr_pin
!= -1) {
1022 /* Datasheet says 5ms between PWR and RST */
1023 usleep_range(5000, 25000);
1024 ret
= gpio_direction_output(config
->pwr_pin
, 1);
1027 if (config
->reset_pin
!= -1) {
1028 /* Datasheet says 5ms between PWR and RST */
1029 usleep_range(5000, 25000);
1030 ret
= gpio_direction_output(config
->reset_pin
, 1);
1032 usleep_range(5000, 25000);
1034 /* Allocate a new VIP instance */
1035 vip
= kzalloc(sizeof(struct sta2x11_vip
), GFP_KERNEL
);
1041 vip
->std
= V4L2_STD_PAL
;
1042 vip
->format
= formats_50
[0];
1043 vip
->config
= config
;
1045 ret
= sta2x11_vip_init_controls(vip
);
1048 ret
= v4l2_device_register(&pdev
->dev
, &vip
->v4l2_dev
);
1052 dev_dbg(&pdev
->dev
, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1053 (unsigned long)pci_resource_start(pdev
, 0),
1054 (unsigned long)pci_resource_len(pdev
, 0), pdev
->irq
);
1056 pci_set_master(pdev
);
1058 ret
= pci_request_regions(pdev
, KBUILD_MODNAME
);
1062 vip
->iomem
= pci_iomap(pdev
, 0, 0x100);
1068 pci_enable_msi(pdev
);
1070 /* Initialize buffer */
1071 ret
= sta2x11_vip_init_buffer(vip
);
1075 spin_lock_init(&vip
->slock
);
1077 ret
= request_irq(pdev
->irq
,
1078 (irq_handler_t
) vip_irq
,
1079 IRQF_SHARED
, KBUILD_MODNAME
, vip
);
1081 dev_err(&pdev
->dev
, "request_irq failed\n");
1086 /* Initialize and register video device */
1087 vip
->video_dev
= video_dev_template
;
1088 vip
->video_dev
.v4l2_dev
= &vip
->v4l2_dev
;
1089 vip
->video_dev
.queue
= &vip
->vb_vidq
;
1090 video_set_drvdata(&vip
->video_dev
, vip
);
1092 ret
= video_register_device(&vip
->video_dev
, VFL_TYPE_GRABBER
, -1);
1096 /* Get ADV7180 subdevice */
1097 vip
->adapter
= i2c_get_adapter(vip
->config
->i2c_id
);
1098 if (!vip
->adapter
) {
1100 dev_err(&pdev
->dev
, "no I2C adapter found\n");
1104 vip
->decoder
= v4l2_i2c_new_subdev(&vip
->v4l2_dev
, vip
->adapter
,
1105 "adv7180", vip
->config
->i2c_addr
,
1107 if (!vip
->decoder
) {
1109 dev_err(&pdev
->dev
, "no decoder found\n");
1113 i2c_put_adapter(vip
->adapter
);
1114 v4l2_subdev_call(vip
->decoder
, core
, init
, 0);
1116 sta2x11_vip_init_register(vip
);
1118 dev_info(&pdev
->dev
, "STA2X11 Video Input Port (VIP) loaded\n");
1122 video_set_drvdata(&vip
->video_dev
, NULL
);
1124 video_unregister_device(&vip
->video_dev
);
1125 free_irq(pdev
->irq
, vip
);
1127 sta2x11_vip_release_buffer(vip
);
1128 pci_disable_msi(pdev
);
1130 vb2_queue_release(&vip
->vb_vidq
);
1131 pci_iounmap(pdev
, vip
->iomem
);
1133 pci_release_regions(pdev
);
1135 v4l2_device_unregister(&vip
->v4l2_dev
);
1139 vip_gpio_release(&pdev
->dev
, config
->reset_pin
, config
->reset_name
);
1140 vip_gpio_release(&pdev
->dev
, config
->pwr_pin
, config
->pwr_name
);
1143 * do not call pci_disable_device on sta2x11 because it break all
1144 * other Bus masters on this EP
1150 * sta2x11_vip_remove_one - release device
1153 * Undo everything done in .._init_one
1155 * unregister video device
1161 static void sta2x11_vip_remove_one(struct pci_dev
*pdev
)
1163 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
1164 struct sta2x11_vip
*vip
=
1165 container_of(v4l2_dev
, struct sta2x11_vip
, v4l2_dev
);
1167 sta2x11_vip_clear_register(vip
);
1169 video_set_drvdata(&vip
->video_dev
, NULL
);
1170 video_unregister_device(&vip
->video_dev
);
1171 free_irq(pdev
->irq
, vip
);
1172 pci_disable_msi(pdev
);
1173 vb2_queue_release(&vip
->vb_vidq
);
1174 pci_iounmap(pdev
, vip
->iomem
);
1175 pci_release_regions(pdev
);
1177 v4l2_device_unregister(&vip
->v4l2_dev
);
1179 vip_gpio_release(&pdev
->dev
, vip
->config
->pwr_pin
,
1180 vip
->config
->pwr_name
);
1181 vip_gpio_release(&pdev
->dev
, vip
->config
->reset_pin
,
1182 vip
->config
->reset_name
);
1186 * do not call pci_disable_device on sta2x11 because it break all
1187 * other Bus masters on this EP
1194 * sta2x11_vip_suspend - set device into power save mode
1196 * @state: new state of device
1198 * all relevant registers are saved and an attempt to set a new state is made.
1200 * return value: 0 always indicate success,
1201 * even if device could not be disabled. (workaround for hardware problem)
1203 static int sta2x11_vip_suspend(struct pci_dev
*pdev
, pm_message_t state
)
1205 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
1206 struct sta2x11_vip
*vip
=
1207 container_of(v4l2_dev
, struct sta2x11_vip
, v4l2_dev
);
1208 unsigned long flags
;
1211 spin_lock_irqsave(&vip
->slock
, flags
);
1212 vip
->register_save_area
[0] = reg_read(vip
, DVP_CTL
);
1213 reg_write(vip
, DVP_CTL
, vip
->register_save_area
[0] & DVP_CTL_DIS
);
1214 vip
->register_save_area
[SAVE_COUNT
] = reg_read(vip
, DVP_ITM
);
1215 reg_write(vip
, DVP_ITM
, 0);
1216 for (i
= 1; i
< SAVE_COUNT
; i
++)
1217 vip
->register_save_area
[i
] = reg_read(vip
, 4 * i
);
1218 for (i
= 0; i
< AUX_COUNT
; i
++)
1219 vip
->register_save_area
[SAVE_COUNT
+ IRQ_COUNT
+ i
] =
1220 reg_read(vip
, registers_to_save
[i
]);
1221 spin_unlock_irqrestore(&vip
->slock
, flags
);
1222 /* save pci state */
1223 pci_save_state(pdev
);
1224 if (pci_set_power_state(pdev
, pci_choose_state(pdev
, state
))) {
1226 * do not call pci_disable_device on sta2x11 because it
1227 * break all other Bus masters on this EP
1232 pr_info("VIP: suspend\n");
1237 * sta2x11_vip_resume - resume device operation
1238 * @pdev : PCI device
1240 * re-enable device, set PCI state to powered and restore registers.
1241 * resume normal device operation afterwards.
1243 * return value: 0, no error.
1245 * other, could not set device to power on state.
1247 static int sta2x11_vip_resume(struct pci_dev
*pdev
)
1249 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
1250 struct sta2x11_vip
*vip
=
1251 container_of(v4l2_dev
, struct sta2x11_vip
, v4l2_dev
);
1252 unsigned long flags
;
1255 pr_info("VIP: resume\n");
1256 /* restore pci state */
1257 if (vip
->disabled
) {
1258 ret
= pci_enable_device(pdev
);
1260 pr_warn("VIP: Can't enable device.\n");
1265 ret
= pci_set_power_state(pdev
, PCI_D0
);
1268 * do not call pci_disable_device on sta2x11 because it
1269 * break all other Bus masters on this EP
1271 pr_warn("VIP: Can't enable device.\n");
1276 pci_restore_state(pdev
);
1278 spin_lock_irqsave(&vip
->slock
, flags
);
1279 for (i
= 1; i
< SAVE_COUNT
; i
++)
1280 reg_write(vip
, 4 * i
, vip
->register_save_area
[i
]);
1281 for (i
= 0; i
< AUX_COUNT
; i
++)
1282 reg_write(vip
, registers_to_save
[i
],
1283 vip
->register_save_area
[SAVE_COUNT
+ IRQ_COUNT
+ i
]);
1284 reg_write(vip
, DVP_CTL
, vip
->register_save_area
[0]);
1285 reg_write(vip
, DVP_ITM
, vip
->register_save_area
[SAVE_COUNT
]);
1286 spin_unlock_irqrestore(&vip
->slock
, flags
);
1292 static const struct pci_device_id sta2x11_vip_pci_tbl
[] = {
1293 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO
, PCI_DEVICE_ID_STMICRO_VIP
)},
1297 static struct pci_driver sta2x11_vip_driver
= {
1298 .name
= KBUILD_MODNAME
,
1299 .probe
= sta2x11_vip_init_one
,
1300 .remove
= sta2x11_vip_remove_one
,
1301 .id_table
= sta2x11_vip_pci_tbl
,
1303 .suspend
= sta2x11_vip_suspend
,
1304 .resume
= sta2x11_vip_resume
,
1308 static int __init
sta2x11_vip_init_module(void)
1310 return pci_register_driver(&sta2x11_vip_driver
);
1313 static void __exit
sta2x11_vip_exit_module(void)
1315 pci_unregister_driver(&sta2x11_vip_driver
);
1319 module_init(sta2x11_vip_init_module
);
1320 module_exit(sta2x11_vip_exit_module
);
1322 late_initcall_sync(sta2x11_vip_init_module
);
1325 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1326 MODULE_AUTHOR("Wind River");
1327 MODULE_LICENSE("GPL v2");
1328 MODULE_SUPPORTED_DEVICE("sta2x11 video input");
1329 MODULE_VERSION(DRV_VERSION
);
1330 MODULE_DEVICE_TABLE(pci
, sta2x11_vip_pci_tbl
);