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
91 struct vb2_v4l2_buffer vb
;
92 struct list_head list
;
95 static inline struct vip_buffer
*to_vip_buffer(struct vb2_v4l2_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 * @vb_vidq: queue maintained by videobuf2 layer
115 * @buffer_list: list of buffer in use
116 * @sequence: sequence number of acquired buffer
117 * @active: current active buffer
118 * @lock: used in videobuf2 callback
119 * @tcount: Number of top frames
120 * @bcount: Number of bottom frames
121 * @overflow: Number of FIFO overflows
122 * @iomem: hardware base address
123 * @config: I2C and gpio config from platform
125 * All non-local data is accessed via this structure.
128 struct v4l2_device v4l2_dev
;
129 struct video_device video_dev
;
130 struct pci_dev
*pdev
;
131 struct i2c_adapter
*adapter
;
132 unsigned int register_save_area
[IRQ_COUNT
+ SAVE_COUNT
+ AUX_COUNT
];
133 struct v4l2_subdev
*decoder
;
134 struct v4l2_ctrl_handler ctrl_hdl
;
137 struct v4l2_pix_format format
;
143 struct vb2_queue vb_vidq
;
144 struct list_head buffer_list
;
145 unsigned int sequence
;
146 struct vip_buffer
*active
; /* current active buffer */
147 spinlock_t lock
; /* Used in videobuf2 callback */
149 /* Interrupt counters */
153 void __iomem
*iomem
; /* I/O Memory */
154 struct vip_config
*config
;
157 static const unsigned int registers_to_save
[AUX_COUNT
] = {
158 DVP_HLFLN
, DVP_RGB
, DVP_PKZ
161 static struct v4l2_pix_format formats_50
[] = {
162 { /*PAL interlaced */
165 .pixelformat
= V4L2_PIX_FMT_UYVY
,
166 .field
= V4L2_FIELD_INTERLACED
,
167 .bytesperline
= 720 * 2,
168 .sizeimage
= 720 * 2 * 576,
169 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
173 .pixelformat
= V4L2_PIX_FMT_UYVY
,
174 .field
= V4L2_FIELD_TOP
,
175 .bytesperline
= 720 * 2,
176 .sizeimage
= 720 * 2 * 288,
177 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
181 .pixelformat
= V4L2_PIX_FMT_UYVY
,
182 .field
= V4L2_FIELD_BOTTOM
,
183 .bytesperline
= 720 * 2,
184 .sizeimage
= 720 * 2 * 288,
185 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
189 static struct v4l2_pix_format formats_60
[] = {
190 { /*NTSC interlaced */
193 .pixelformat
= V4L2_PIX_FMT_UYVY
,
194 .field
= V4L2_FIELD_INTERLACED
,
195 .bytesperline
= 720 * 2,
196 .sizeimage
= 720 * 2 * 480,
197 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
201 .pixelformat
= V4L2_PIX_FMT_UYVY
,
202 .field
= V4L2_FIELD_TOP
,
203 .bytesperline
= 720 * 2,
204 .sizeimage
= 720 * 2 * 240,
205 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
209 .pixelformat
= V4L2_PIX_FMT_UYVY
,
210 .field
= V4L2_FIELD_BOTTOM
,
211 .bytesperline
= 720 * 2,
212 .sizeimage
= 720 * 2 * 240,
213 .colorspace
= V4L2_COLORSPACE_SMPTE170M
},
216 /* Write VIP register */
217 static inline void reg_write(struct sta2x11_vip
*vip
, unsigned int reg
, u32 val
)
219 iowrite32((val
), (vip
->iomem
)+(reg
));
221 /* Read VIP register */
222 static inline u32
reg_read(struct sta2x11_vip
*vip
, unsigned int reg
)
224 return ioread32((vip
->iomem
)+(reg
));
226 /* Start DMA acquisition */
227 static void start_dma(struct sta2x11_vip
*vip
, struct vip_buffer
*vip_buf
)
229 unsigned long offset
= 0;
231 if (vip
->format
.field
== V4L2_FIELD_INTERLACED
)
232 offset
= vip
->format
.width
* 2;
234 spin_lock_irq(&vip
->slock
);
235 /* Enable acquisition */
236 reg_write(vip
, DVP_CTL
, reg_read(vip
, DVP_CTL
) | DVP_CTL_ENA
);
237 /* Set Top and Bottom Field memory address */
238 reg_write(vip
, DVP_VTP
, (u32
)vip_buf
->dma
);
239 reg_write(vip
, DVP_VBP
, (u32
)vip_buf
->dma
+ offset
);
240 spin_unlock_irq(&vip
->slock
);
243 /* Fetch the next buffer to activate */
244 static void vip_active_buf_next(struct sta2x11_vip
*vip
)
246 /* Get the next buffer */
247 spin_lock(&vip
->lock
);
248 if (list_empty(&vip
->buffer_list
)) {/* No available buffer */
249 spin_unlock(&vip
->lock
);
252 vip
->active
= list_first_entry(&vip
->buffer_list
,
255 /* Reset Top and Bottom counter */
258 spin_unlock(&vip
->lock
);
259 if (vb2_is_streaming(&vip
->vb_vidq
)) { /* streaming is on */
260 start_dma(vip
, vip
->active
); /* start dma capture */
265 /* Videobuf2 Operations */
266 static int queue_setup(struct vb2_queue
*vq
,
267 unsigned int *nbuffers
, unsigned int *nplanes
,
268 unsigned int sizes
[], struct device
*alloc_devs
[])
270 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vq
);
272 if (!(*nbuffers
) || *nbuffers
< MAX_FRAMES
)
273 *nbuffers
= MAX_FRAMES
;
276 sizes
[0] = vip
->format
.sizeimage
;
285 static int buffer_init(struct vb2_buffer
*vb
)
287 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
288 struct vip_buffer
*vip_buf
= to_vip_buffer(vbuf
);
290 vip_buf
->dma
= vb2_dma_contig_plane_dma_addr(vb
, 0);
291 INIT_LIST_HEAD(&vip_buf
->list
);
295 static int buffer_prepare(struct vb2_buffer
*vb
)
297 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
298 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vb
->vb2_queue
);
299 struct vip_buffer
*vip_buf
= to_vip_buffer(vbuf
);
302 size
= vip
->format
.sizeimage
;
303 if (vb2_plane_size(vb
, 0) < size
) {
304 v4l2_err(&vip
->v4l2_dev
, "buffer too small (%lu < %lu)\n",
305 vb2_plane_size(vb
, 0), size
);
309 vb2_set_plane_payload(&vip_buf
->vb
.vb2_buf
, 0, size
);
313 static void buffer_queue(struct vb2_buffer
*vb
)
315 struct vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
316 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vb
->vb2_queue
);
317 struct vip_buffer
*vip_buf
= to_vip_buffer(vbuf
);
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 vb2_v4l2_buffer
*vbuf
= to_vb2_v4l2_buffer(vb
);
333 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vb
->vb2_queue
);
334 struct vip_buffer
*vip_buf
= to_vip_buffer(vbuf
);
336 /* Buffer handled, remove it from the list */
337 spin_lock(&vip
->lock
);
338 list_del_init(&vip_buf
->list
);
339 spin_unlock(&vip
->lock
);
341 if (vb2_is_streaming(vb
->vb2_queue
))
342 vip_active_buf_next(vip
);
345 static int start_streaming(struct vb2_queue
*vq
, unsigned int count
)
347 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vq
);
349 spin_lock_irq(&vip
->slock
);
350 /* Enable interrupt VSYNC Top and Bottom*/
351 reg_write(vip
, DVP_ITM
, DVP_IT_VSB
| DVP_IT_VST
);
352 spin_unlock_irq(&vip
->slock
);
355 start_dma(vip
, vip
->active
);
360 /* abort streaming and wait for last buffer */
361 static void stop_streaming(struct vb2_queue
*vq
)
363 struct sta2x11_vip
*vip
= vb2_get_drv_priv(vq
);
364 struct vip_buffer
*vip_buf
, *node
;
366 /* Disable acquisition */
367 reg_write(vip
, DVP_CTL
, reg_read(vip
, DVP_CTL
) & ~DVP_CTL_ENA
);
368 /* Disable all interrupts */
369 reg_write(vip
, DVP_ITM
, 0);
371 /* Release all active buffers */
372 spin_lock(&vip
->lock
);
373 list_for_each_entry_safe(vip_buf
, node
, &vip
->buffer_list
, list
) {
374 vb2_buffer_done(&vip_buf
->vb
.vb2_buf
, VB2_BUF_STATE_ERROR
);
375 list_del(&vip_buf
->list
);
377 spin_unlock(&vip
->lock
);
380 static const struct vb2_ops vip_video_qops
= {
381 .queue_setup
= queue_setup
,
382 .buf_init
= buffer_init
,
383 .buf_prepare
= buffer_prepare
,
384 .buf_finish
= buffer_finish
,
385 .buf_queue
= buffer_queue
,
386 .start_streaming
= start_streaming
,
387 .stop_streaming
= stop_streaming
,
391 /* File Operations */
392 static const struct v4l2_file_operations vip_fops
= {
393 .owner
= THIS_MODULE
,
394 .open
= v4l2_fh_open
,
395 .release
= vb2_fop_release
,
396 .unlocked_ioctl
= video_ioctl2
,
397 .read
= vb2_fop_read
,
398 .mmap
= vb2_fop_mmap
,
404 * vidioc_querycap - return capabilities of device
405 * @file: descriptor of device
406 * @cap: contains return values
409 * the capabilities of the device are returned
411 * return value: 0, no error.
413 static int vidioc_querycap(struct file
*file
, void *priv
,
414 struct v4l2_capability
*cap
)
416 struct sta2x11_vip
*vip
= video_drvdata(file
);
418 strcpy(cap
->driver
, KBUILD_MODNAME
);
419 strcpy(cap
->card
, KBUILD_MODNAME
);
420 snprintf(cap
->bus_info
, sizeof(cap
->bus_info
), "PCI:%s",
421 pci_name(vip
->pdev
));
422 cap
->device_caps
= V4L2_CAP_VIDEO_CAPTURE
| V4L2_CAP_READWRITE
|
424 cap
->capabilities
= cap
->device_caps
| V4L2_CAP_DEVICE_CAPS
;
430 * vidioc_s_std - set video standard
431 * @file: descriptor of device
432 * @std: contains standard to be set
435 * the video standard is set
437 * return value: 0, no error.
439 * -EIO, no input signal detected
441 * other, returned from video DAC.
443 static int vidioc_s_std(struct file
*file
, void *priv
, v4l2_std_id std
)
445 struct sta2x11_vip
*vip
= video_drvdata(file
);
448 * This is here for backwards compatibility only.
449 * The use of V4L2_STD_ALL to trigger a querystd is non-standard.
451 if (std
== V4L2_STD_ALL
) {
452 v4l2_subdev_call(vip
->decoder
, video
, querystd
, &std
);
453 if (std
== V4L2_STD_UNKNOWN
)
457 if (vip
->std
!= std
) {
459 if (V4L2_STD_525_60
& std
)
460 vip
->format
= formats_60
[0];
462 vip
->format
= formats_50
[0];
465 return v4l2_subdev_call(vip
->decoder
, video
, s_std
, std
);
469 * vidioc_g_std - get video standard
470 * @file: descriptor of device
472 * @std: contains return values
474 * the current video standard is returned
476 * return value: 0, no error.
478 static int vidioc_g_std(struct file
*file
, void *priv
, v4l2_std_id
*std
)
480 struct sta2x11_vip
*vip
= video_drvdata(file
);
487 * vidioc_querystd - get possible video standards
488 * @file: descriptor of device
490 * @std: contains return values
492 * all possible video standards are returned
494 * return value: delivered by video DAC routine.
496 static int vidioc_querystd(struct file
*file
, void *priv
, v4l2_std_id
*std
)
498 struct sta2x11_vip
*vip
= video_drvdata(file
);
500 return v4l2_subdev_call(vip
->decoder
, video
, querystd
, std
);
503 static int vidioc_enum_input(struct file
*file
, void *priv
,
504 struct v4l2_input
*inp
)
509 inp
->type
= V4L2_INPUT_TYPE_CAMERA
;
510 inp
->std
= V4L2_STD_ALL
;
511 sprintf(inp
->name
, "Camera %u", inp
->index
);
517 * vidioc_s_input - set input line
518 * @file: descriptor of device
520 * @i: new input line number
522 * the current active input line is set
524 * return value: 0, no error.
526 * -EINVAL, line number out of range
528 static int vidioc_s_input(struct file
*file
, void *priv
, unsigned int i
)
530 struct sta2x11_vip
*vip
= video_drvdata(file
);
535 ret
= v4l2_subdev_call(vip
->decoder
, video
, s_routing
, i
, 0, 0);
544 * vidioc_g_input - return input line
545 * @file: descriptor of device
547 * @i: returned input line number
549 * the current active input line is returned
551 * return value: always 0.
553 static int vidioc_g_input(struct file
*file
, void *priv
, unsigned int *i
)
555 struct sta2x11_vip
*vip
= video_drvdata(file
);
562 * vidioc_enum_fmt_vid_cap - return video capture format
563 * @file: descriptor of device
565 * @f: returned format information
567 * returns name and format of video capture
568 * Only UYVY is supported by hardware.
570 * return value: always 0.
572 static int vidioc_enum_fmt_vid_cap(struct file
*file
, void *priv
,
573 struct v4l2_fmtdesc
*f
)
579 strcpy(f
->description
, "4:2:2, packed, UYVY");
580 f
->pixelformat
= V4L2_PIX_FMT_UYVY
;
586 * vidioc_try_fmt_vid_cap - set video capture format
587 * @file: descriptor of device
591 * new video format is set which includes width and
592 * field type. width is fixed to 720, no scaling.
593 * Only UYVY is supported by this hardware.
594 * the minimum height is 200, the maximum is 576 (PAL)
596 * return value: 0, no error
598 * -EINVAL, pixel or field format not supported
601 static int vidioc_try_fmt_vid_cap(struct file
*file
, void *priv
,
602 struct v4l2_format
*f
)
604 struct sta2x11_vip
*vip
= video_drvdata(file
);
607 if (V4L2_PIX_FMT_UYVY
!= f
->fmt
.pix
.pixelformat
) {
608 v4l2_warn(&vip
->v4l2_dev
, "Invalid format, only UYVY supported\n");
612 if (V4L2_STD_525_60
& vip
->std
)
617 switch (f
->fmt
.pix
.field
) {
620 if (interlace_lim
< f
->fmt
.pix
.height
)
621 f
->fmt
.pix
.field
= V4L2_FIELD_INTERLACED
;
623 f
->fmt
.pix
.field
= V4L2_FIELD_BOTTOM
;
626 case V4L2_FIELD_BOTTOM
:
627 if (interlace_lim
< f
->fmt
.pix
.height
)
628 f
->fmt
.pix
.height
= interlace_lim
;
630 case V4L2_FIELD_INTERLACED
:
634 /* It is the only supported format */
635 f
->fmt
.pix
.pixelformat
= V4L2_PIX_FMT_UYVY
;
636 f
->fmt
.pix
.height
&= ~1;
637 if (2 * interlace_lim
< f
->fmt
.pix
.height
)
638 f
->fmt
.pix
.height
= 2 * interlace_lim
;
639 if (200 > f
->fmt
.pix
.height
)
640 f
->fmt
.pix
.height
= 200;
641 f
->fmt
.pix
.width
= 720;
642 f
->fmt
.pix
.bytesperline
= f
->fmt
.pix
.width
* 2;
643 f
->fmt
.pix
.sizeimage
= f
->fmt
.pix
.width
* 2 * f
->fmt
.pix
.height
;
644 f
->fmt
.pix
.colorspace
= V4L2_COLORSPACE_SMPTE170M
;
649 * vidioc_s_fmt_vid_cap - set current video format parameters
650 * @file: descriptor of device
652 * @f: returned format information
654 * set new capture format
655 * return value: 0, no error
657 * other, delivered by video DAC routine.
659 static int vidioc_s_fmt_vid_cap(struct file
*file
, void *priv
,
660 struct v4l2_format
*f
)
662 struct sta2x11_vip
*vip
= video_drvdata(file
);
663 unsigned int t_stop
, b_stop
, pitch
;
666 ret
= vidioc_try_fmt_vid_cap(file
, priv
, f
);
670 if (vb2_is_busy(&vip
->vb_vidq
)) {
671 /* Can't change format during acquisition */
672 v4l2_err(&vip
->v4l2_dev
, "device busy\n");
675 vip
->format
= f
->fmt
.pix
;
676 switch (vip
->format
.field
) {
677 case V4L2_FIELD_INTERLACED
:
678 t_stop
= ((vip
->format
.height
/ 2 - 1) << 16) |
679 (2 * vip
->format
.width
- 1);
681 pitch
= 4 * vip
->format
.width
;
684 t_stop
= ((vip
->format
.height
- 1) << 16) |
685 (2 * vip
->format
.width
- 1);
686 b_stop
= (0 << 16) | (2 * vip
->format
.width
- 1);
687 pitch
= 2 * vip
->format
.width
;
689 case V4L2_FIELD_BOTTOM
:
690 t_stop
= (0 << 16) | (2 * vip
->format
.width
- 1);
691 b_stop
= (vip
->format
.height
<< 16) |
692 (2 * vip
->format
.width
- 1);
693 pitch
= 2 * vip
->format
.width
;
696 v4l2_err(&vip
->v4l2_dev
, "unknown field format\n");
700 spin_lock_irq(&vip
->slock
);
701 /* Y-X Top Field Offset */
702 reg_write(vip
, DVP_TFO
, 0);
703 /* Y-X Bottom Field Offset */
704 reg_write(vip
, DVP_BFO
, 0);
705 /* Y-X Top Field Stop*/
706 reg_write(vip
, DVP_TFS
, t_stop
);
707 /* Y-X Bottom Field Stop */
708 reg_write(vip
, DVP_BFS
, b_stop
);
709 /* Video Memory Pitch */
710 reg_write(vip
, DVP_VMP
, pitch
);
711 spin_unlock_irq(&vip
->slock
);
717 * vidioc_g_fmt_vid_cap - get current video format parameters
718 * @file: descriptor of device
720 * @f: contains format information
722 * returns current video format parameters
724 * return value: 0, always successful
726 static int vidioc_g_fmt_vid_cap(struct file
*file
, void *priv
,
727 struct v4l2_format
*f
)
729 struct sta2x11_vip
*vip
= video_drvdata(file
);
731 f
->fmt
.pix
= vip
->format
;
736 static const struct v4l2_ioctl_ops vip_ioctl_ops
= {
737 .vidioc_querycap
= vidioc_querycap
,
739 .vidioc_enum_fmt_vid_cap
= vidioc_enum_fmt_vid_cap
,
740 .vidioc_g_fmt_vid_cap
= vidioc_g_fmt_vid_cap
,
741 .vidioc_s_fmt_vid_cap
= vidioc_s_fmt_vid_cap
,
742 .vidioc_try_fmt_vid_cap
= vidioc_try_fmt_vid_cap
,
743 /* Buffer handlers */
744 .vidioc_create_bufs
= vb2_ioctl_create_bufs
,
745 .vidioc_prepare_buf
= vb2_ioctl_prepare_buf
,
746 .vidioc_reqbufs
= vb2_ioctl_reqbufs
,
747 .vidioc_querybuf
= vb2_ioctl_querybuf
,
748 .vidioc_qbuf
= vb2_ioctl_qbuf
,
749 .vidioc_dqbuf
= vb2_ioctl_dqbuf
,
751 .vidioc_streamon
= vb2_ioctl_streamon
,
752 .vidioc_streamoff
= vb2_ioctl_streamoff
,
753 /* Standard handling */
754 .vidioc_g_std
= vidioc_g_std
,
755 .vidioc_s_std
= vidioc_s_std
,
756 .vidioc_querystd
= vidioc_querystd
,
758 .vidioc_enum_input
= vidioc_enum_input
,
759 .vidioc_g_input
= vidioc_g_input
,
760 .vidioc_s_input
= vidioc_s_input
,
761 /* Log status ioctl */
762 .vidioc_log_status
= v4l2_ctrl_log_status
,
764 .vidioc_subscribe_event
= v4l2_ctrl_subscribe_event
,
765 .vidioc_unsubscribe_event
= v4l2_event_unsubscribe
,
768 static const struct video_device video_dev_template
= {
769 .name
= KBUILD_MODNAME
,
770 .release
= video_device_release_empty
,
772 .ioctl_ops
= &vip_ioctl_ops
,
773 .tvnorms
= V4L2_STD_ALL
,
777 * vip_irq - interrupt routine
778 * @irq: Number of interrupt ( not used, correct number is assumed )
779 * @vip: local data structure containing all information
781 * check for both frame interrupts set ( top and bottom ).
782 * check FIFO overflow, but limit number of log messages after open.
783 * signal a complete buffer if done
785 * return value: IRQ_NONE, interrupt was not generated by VIP
787 * IRQ_HANDLED, interrupt done.
789 static irqreturn_t
vip_irq(int irq
, struct sta2x11_vip
*vip
)
793 status
= reg_read(vip
, DVP_ITS
);
795 if (!status
) /* No interrupt to handle */
798 if (status
& DVP_IT_FIFO
)
799 if (vip
->overflow
++ > 5)
800 pr_info("VIP: fifo overflow\n");
802 if ((status
& DVP_IT_VST
) && (status
& DVP_IT_VSB
)) {
803 /* this is bad, we are too slow, hope the condition is gone
804 * on the next frame */
808 if (status
& DVP_IT_VST
)
809 if ((++vip
->tcount
) < 2)
811 if (status
& DVP_IT_VSB
) {
816 if (vip
->active
) { /* Acquisition is over on this buffer */
817 /* Disable acquisition */
818 reg_write(vip
, DVP_CTL
, reg_read(vip
, DVP_CTL
) & ~DVP_CTL_ENA
);
819 /* Remove the active buffer from the list */
820 vip
->active
->vb
.vb2_buf
.timestamp
= ktime_get_ns();
821 vip
->active
->vb
.sequence
= vip
->sequence
++;
822 vb2_buffer_done(&vip
->active
->vb
.vb2_buf
, VB2_BUF_STATE_DONE
);
828 static void sta2x11_vip_init_register(struct sta2x11_vip
*vip
)
830 /* Register initialization */
831 spin_lock_irq(&vip
->slock
);
832 /* Clean interrupt */
833 reg_read(vip
, DVP_ITS
);
834 /* Enable Half Line per vertical */
835 reg_write(vip
, DVP_HLFLN
, DVP_HLFLN_SD
);
836 /* Reset VIP control */
837 reg_write(vip
, DVP_CTL
, DVP_CTL_RST
);
838 /* Clear VIP control */
839 reg_write(vip
, DVP_CTL
, 0);
840 spin_unlock_irq(&vip
->slock
);
842 static void sta2x11_vip_clear_register(struct sta2x11_vip
*vip
)
844 spin_lock_irq(&vip
->slock
);
845 /* Disable interrupt */
846 reg_write(vip
, DVP_ITM
, 0);
847 /* Reset VIP Control */
848 reg_write(vip
, DVP_CTL
, DVP_CTL_RST
);
849 /* Clear VIP Control */
850 reg_write(vip
, DVP_CTL
, 0);
851 /* Clean VIP Interrupt */
852 reg_read(vip
, DVP_ITS
);
853 spin_unlock_irq(&vip
->slock
);
855 static int sta2x11_vip_init_buffer(struct sta2x11_vip
*vip
)
859 err
= dma_set_coherent_mask(&vip
->pdev
->dev
, DMA_BIT_MASK(29));
861 v4l2_err(&vip
->v4l2_dev
, "Cannot configure coherent mask");
864 memset(&vip
->vb_vidq
, 0, sizeof(struct vb2_queue
));
865 vip
->vb_vidq
.type
= V4L2_BUF_TYPE_VIDEO_CAPTURE
;
866 vip
->vb_vidq
.io_modes
= VB2_MMAP
| VB2_READ
;
867 vip
->vb_vidq
.drv_priv
= vip
;
868 vip
->vb_vidq
.buf_struct_size
= sizeof(struct vip_buffer
);
869 vip
->vb_vidq
.ops
= &vip_video_qops
;
870 vip
->vb_vidq
.mem_ops
= &vb2_dma_contig_memops
;
871 vip
->vb_vidq
.timestamp_flags
= V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC
;
872 vip
->vb_vidq
.dev
= &vip
->pdev
->dev
;
873 err
= vb2_queue_init(&vip
->vb_vidq
);
876 INIT_LIST_HEAD(&vip
->buffer_list
);
877 spin_lock_init(&vip
->lock
);
881 static int sta2x11_vip_init_controls(struct sta2x11_vip
*vip
)
884 * Inititialize an empty control so VIP can inerithing controls
887 v4l2_ctrl_handler_init(&vip
->ctrl_hdl
, 0);
889 vip
->v4l2_dev
.ctrl_handler
= &vip
->ctrl_hdl
;
890 if (vip
->ctrl_hdl
.error
) {
891 int err
= vip
->ctrl_hdl
.error
;
893 v4l2_ctrl_handler_free(&vip
->ctrl_hdl
);
901 * vip_gpio_reserve - reserve gpio pin
903 * @pin: GPIO pin number
904 * @dir: direction, input or output
905 * @name: GPIO pin name
908 static int vip_gpio_reserve(struct device
*dev
, int pin
, int dir
,
916 ret
= gpio_request(pin
, name
);
918 dev_err(dev
, "Failed to allocate pin %d (%s)\n", pin
, name
);
922 ret
= gpio_direction_output(pin
, dir
);
924 dev_err(dev
, "Failed to set direction for pin %d (%s)\n",
930 ret
= gpio_export(pin
, false);
932 dev_err(dev
, "Failed to export pin %d (%s)\n", pin
, name
);
941 * vip_gpio_release - release gpio pin
943 * @pin: GPIO pin number
944 * @name: GPIO pin name
947 static void vip_gpio_release(struct device
*dev
, int pin
, const char *name
)
950 dev_dbg(dev
, "releasing pin %d (%s)\n", pin
, name
);
957 * sta2x11_vip_init_one - init one instance of video device
961 * allocate reset pins for DAC.
962 * Reset video DAC, this is done via reset line.
963 * allocate memory for managing device
967 * find and initialize video DAC
969 * return value: 0, no error
973 * -ENODEV, device could not be detected or registered
975 static int sta2x11_vip_init_one(struct pci_dev
*pdev
,
976 const struct pci_device_id
*ent
)
979 struct sta2x11_vip
*vip
;
980 struct vip_config
*config
;
982 /* Check if hardware support 26-bit DMA */
983 if (dma_set_mask(&pdev
->dev
, DMA_BIT_MASK(26))) {
984 dev_err(&pdev
->dev
, "26-bit DMA addressing not available\n");
988 ret
= pci_enable_device(pdev
);
992 /* Get VIP platform data */
993 config
= dev_get_platdata(&pdev
->dev
);
995 dev_info(&pdev
->dev
, "VIP slot disabled\n");
1000 /* Power configuration */
1001 ret
= vip_gpio_reserve(&pdev
->dev
, config
->pwr_pin
, 0,
1006 if (config
->reset_pin
>= 0) {
1007 ret
= vip_gpio_reserve(&pdev
->dev
, config
->reset_pin
, 0,
1008 config
->reset_name
);
1010 vip_gpio_release(&pdev
->dev
, config
->pwr_pin
,
1015 if (config
->pwr_pin
!= -1) {
1016 /* Datasheet says 5ms between PWR and RST */
1017 usleep_range(5000, 25000);
1018 ret
= gpio_direction_output(config
->pwr_pin
, 1);
1021 if (config
->reset_pin
!= -1) {
1022 /* Datasheet says 5ms between PWR and RST */
1023 usleep_range(5000, 25000);
1024 ret
= gpio_direction_output(config
->reset_pin
, 1);
1026 usleep_range(5000, 25000);
1028 /* Allocate a new VIP instance */
1029 vip
= kzalloc(sizeof(struct sta2x11_vip
), GFP_KERNEL
);
1035 vip
->std
= V4L2_STD_PAL
;
1036 vip
->format
= formats_50
[0];
1037 vip
->config
= config
;
1039 ret
= sta2x11_vip_init_controls(vip
);
1042 ret
= v4l2_device_register(&pdev
->dev
, &vip
->v4l2_dev
);
1046 dev_dbg(&pdev
->dev
, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1047 (unsigned long)pci_resource_start(pdev
, 0),
1048 (unsigned long)pci_resource_len(pdev
, 0), pdev
->irq
);
1050 pci_set_master(pdev
);
1052 ret
= pci_request_regions(pdev
, KBUILD_MODNAME
);
1056 vip
->iomem
= pci_iomap(pdev
, 0, 0x100);
1062 pci_enable_msi(pdev
);
1064 /* Initialize buffer */
1065 ret
= sta2x11_vip_init_buffer(vip
);
1069 spin_lock_init(&vip
->slock
);
1071 ret
= request_irq(pdev
->irq
,
1072 (irq_handler_t
) vip_irq
,
1073 IRQF_SHARED
, KBUILD_MODNAME
, vip
);
1075 dev_err(&pdev
->dev
, "request_irq failed\n");
1080 /* Initialize and register video device */
1081 vip
->video_dev
= video_dev_template
;
1082 vip
->video_dev
.v4l2_dev
= &vip
->v4l2_dev
;
1083 vip
->video_dev
.queue
= &vip
->vb_vidq
;
1084 video_set_drvdata(&vip
->video_dev
, vip
);
1086 ret
= video_register_device(&vip
->video_dev
, VFL_TYPE_GRABBER
, -1);
1090 /* Get ADV7180 subdevice */
1091 vip
->adapter
= i2c_get_adapter(vip
->config
->i2c_id
);
1092 if (!vip
->adapter
) {
1094 dev_err(&pdev
->dev
, "no I2C adapter found\n");
1098 vip
->decoder
= v4l2_i2c_new_subdev(&vip
->v4l2_dev
, vip
->adapter
,
1099 "adv7180", vip
->config
->i2c_addr
,
1101 if (!vip
->decoder
) {
1103 dev_err(&pdev
->dev
, "no decoder found\n");
1107 i2c_put_adapter(vip
->adapter
);
1108 v4l2_subdev_call(vip
->decoder
, core
, init
, 0);
1110 sta2x11_vip_init_register(vip
);
1112 dev_info(&pdev
->dev
, "STA2X11 Video Input Port (VIP) loaded\n");
1116 video_set_drvdata(&vip
->video_dev
, NULL
);
1118 video_unregister_device(&vip
->video_dev
);
1119 free_irq(pdev
->irq
, vip
);
1121 pci_disable_msi(pdev
);
1123 vb2_queue_release(&vip
->vb_vidq
);
1124 pci_iounmap(pdev
, vip
->iomem
);
1126 pci_release_regions(pdev
);
1128 v4l2_device_unregister(&vip
->v4l2_dev
);
1132 vip_gpio_release(&pdev
->dev
, config
->reset_pin
, config
->reset_name
);
1133 vip_gpio_release(&pdev
->dev
, config
->pwr_pin
, config
->pwr_name
);
1136 * do not call pci_disable_device on sta2x11 because it break all
1137 * other Bus masters on this EP
1143 * sta2x11_vip_remove_one - release device
1146 * Undo everything done in .._init_one
1148 * unregister video device
1154 static void sta2x11_vip_remove_one(struct pci_dev
*pdev
)
1156 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
1157 struct sta2x11_vip
*vip
=
1158 container_of(v4l2_dev
, struct sta2x11_vip
, v4l2_dev
);
1160 sta2x11_vip_clear_register(vip
);
1162 video_set_drvdata(&vip
->video_dev
, NULL
);
1163 video_unregister_device(&vip
->video_dev
);
1164 free_irq(pdev
->irq
, vip
);
1165 pci_disable_msi(pdev
);
1166 vb2_queue_release(&vip
->vb_vidq
);
1167 pci_iounmap(pdev
, vip
->iomem
);
1168 pci_release_regions(pdev
);
1170 v4l2_device_unregister(&vip
->v4l2_dev
);
1172 vip_gpio_release(&pdev
->dev
, vip
->config
->pwr_pin
,
1173 vip
->config
->pwr_name
);
1174 vip_gpio_release(&pdev
->dev
, vip
->config
->reset_pin
,
1175 vip
->config
->reset_name
);
1179 * do not call pci_disable_device on sta2x11 because it break all
1180 * other Bus masters on this EP
1187 * sta2x11_vip_suspend - set device into power save mode
1189 * @state: new state of device
1191 * all relevant registers are saved and an attempt to set a new state is made.
1193 * return value: 0 always indicate success,
1194 * even if device could not be disabled. (workaround for hardware problem)
1196 static int sta2x11_vip_suspend(struct pci_dev
*pdev
, pm_message_t state
)
1198 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
1199 struct sta2x11_vip
*vip
=
1200 container_of(v4l2_dev
, struct sta2x11_vip
, v4l2_dev
);
1201 unsigned long flags
;
1204 spin_lock_irqsave(&vip
->slock
, flags
);
1205 vip
->register_save_area
[0] = reg_read(vip
, DVP_CTL
);
1206 reg_write(vip
, DVP_CTL
, vip
->register_save_area
[0] & DVP_CTL_DIS
);
1207 vip
->register_save_area
[SAVE_COUNT
] = reg_read(vip
, DVP_ITM
);
1208 reg_write(vip
, DVP_ITM
, 0);
1209 for (i
= 1; i
< SAVE_COUNT
; i
++)
1210 vip
->register_save_area
[i
] = reg_read(vip
, 4 * i
);
1211 for (i
= 0; i
< AUX_COUNT
; i
++)
1212 vip
->register_save_area
[SAVE_COUNT
+ IRQ_COUNT
+ i
] =
1213 reg_read(vip
, registers_to_save
[i
]);
1214 spin_unlock_irqrestore(&vip
->slock
, flags
);
1215 /* save pci state */
1216 pci_save_state(pdev
);
1217 if (pci_set_power_state(pdev
, pci_choose_state(pdev
, state
))) {
1219 * do not call pci_disable_device on sta2x11 because it
1220 * break all other Bus masters on this EP
1225 pr_info("VIP: suspend\n");
1230 * sta2x11_vip_resume - resume device operation
1231 * @pdev : PCI device
1233 * re-enable device, set PCI state to powered and restore registers.
1234 * resume normal device operation afterwards.
1236 * return value: 0, no error.
1238 * other, could not set device to power on state.
1240 static int sta2x11_vip_resume(struct pci_dev
*pdev
)
1242 struct v4l2_device
*v4l2_dev
= pci_get_drvdata(pdev
);
1243 struct sta2x11_vip
*vip
=
1244 container_of(v4l2_dev
, struct sta2x11_vip
, v4l2_dev
);
1245 unsigned long flags
;
1248 pr_info("VIP: resume\n");
1249 /* restore pci state */
1250 if (vip
->disabled
) {
1251 ret
= pci_enable_device(pdev
);
1253 pr_warn("VIP: Can't enable device.\n");
1258 ret
= pci_set_power_state(pdev
, PCI_D0
);
1261 * do not call pci_disable_device on sta2x11 because it
1262 * break all other Bus masters on this EP
1264 pr_warn("VIP: Can't enable device.\n");
1269 pci_restore_state(pdev
);
1271 spin_lock_irqsave(&vip
->slock
, flags
);
1272 for (i
= 1; i
< SAVE_COUNT
; i
++)
1273 reg_write(vip
, 4 * i
, vip
->register_save_area
[i
]);
1274 for (i
= 0; i
< AUX_COUNT
; i
++)
1275 reg_write(vip
, registers_to_save
[i
],
1276 vip
->register_save_area
[SAVE_COUNT
+ IRQ_COUNT
+ i
]);
1277 reg_write(vip
, DVP_CTL
, vip
->register_save_area
[0]);
1278 reg_write(vip
, DVP_ITM
, vip
->register_save_area
[SAVE_COUNT
]);
1279 spin_unlock_irqrestore(&vip
->slock
, flags
);
1285 static const struct pci_device_id sta2x11_vip_pci_tbl
[] = {
1286 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO
, PCI_DEVICE_ID_STMICRO_VIP
)},
1290 static struct pci_driver sta2x11_vip_driver
= {
1291 .name
= KBUILD_MODNAME
,
1292 .probe
= sta2x11_vip_init_one
,
1293 .remove
= sta2x11_vip_remove_one
,
1294 .id_table
= sta2x11_vip_pci_tbl
,
1296 .suspend
= sta2x11_vip_suspend
,
1297 .resume
= sta2x11_vip_resume
,
1301 static int __init
sta2x11_vip_init_module(void)
1303 return pci_register_driver(&sta2x11_vip_driver
);
1306 static void __exit
sta2x11_vip_exit_module(void)
1308 pci_unregister_driver(&sta2x11_vip_driver
);
1312 module_init(sta2x11_vip_init_module
);
1313 module_exit(sta2x11_vip_exit_module
);
1315 late_initcall_sync(sta2x11_vip_init_module
);
1318 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1319 MODULE_AUTHOR("Wind River");
1320 MODULE_LICENSE("GPL v2");
1321 MODULE_SUPPORTED_DEVICE("sta2x11 video input");
1322 MODULE_VERSION(DRV_VERSION
);
1323 MODULE_DEVICE_TABLE(pci
, sta2x11_vip_pci_tbl
);