2 * This is the driver for the STA2x11 Video Input Port.
4 * Copyright (C) 2010 WindRiver Systems, Inc.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
19 * The full GNU General Public License is included in this distribution in
20 * the file called "COPYING".
22 * Author: Andreas Kies <andreas.kies@windriver.com>
23 * Vlad Lungu <vlad.lungu@windriver.com>
27 #include <linux/types.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/vmalloc.h>
33 #include <linux/videodev2.h>
35 #include <linux/kmod.h>
37 #include <linux/pci.h>
38 #include <linux/interrupt.h>
39 #include <linux/mutex.h>
41 #include <linux/gpio.h>
42 #include <linux/i2c.h>
43 #include <linux/delay.h>
44 #include <media/v4l2-common.h>
45 #include <media/v4l2-device.h>
46 #include <media/v4l2-ioctl.h>
47 #include <media/videobuf-dma-contig.h>
49 #include "sta2x11_vip.h"
51 #define DRV_NAME "sta2x11_vip"
52 #define DRV_VERSION "1.3"
54 #ifndef PCI_DEVICE_ID_STMICRO_VIP
55 #define PCI_DEVICE_ID_STMICRO_VIP 0xCC0D
72 #define DVP_HLFLN 0xA8
77 #define DVP_CTL_ENA 0x00000001
78 #define DVP_CTL_RST 0x80000000
79 #define DVP_CTL_DIS (~0x00040001)
81 #define DVP_IT_VSB 0x00000008
82 #define DVP_IT_VST 0x00000010
83 #define DVP_IT_FIFO 0x00000020
85 #define DVP_HLFLN_SD 0x00000001
87 #define REG_WRITE(vip, reg, value) iowrite32((value), (vip->iomem)+(reg))
88 #define REG_READ(vip, reg) ioread32((vip->iomem)+(reg))
95 * struct sta2x11_vip - All internal data for one instance of device
96 * @v4l2_dev: device registered in v4l layer
97 * @video_dev: properties of our device
99 * @adapter: contains I2C adapter information
100 * @register_save_area: All relevant register are saved here during suspend
101 * @decoder: contains information about video DAC
102 * @format: pixel format, fixed UYVY
103 * @std: video standard (e.g. PAL/NTSC)
104 * @input: input line for video signal ( 0 or 1 )
105 * @users: Number of open of device ( max. 1 )
106 * @disabled: Device is in power down state
107 * @mutex: ensures exclusive opening of device
108 * @slock: for excluse acces of registers
109 * @vb_vidq: queue maintained by videobuf layer
110 * @capture: linked list of capture buffer
111 * @active: struct videobuf_buffer currently beingg filled
112 * @started: device is ready to capture frame
113 * @closing: device will be shut down
114 * @tcount: Number of top frames
115 * @bcount: Number of bottom frames
116 * @overflow: Number of FIFO overflows
117 * @mem_spare: small buffer of unused frame
118 * @dma_spare: dma addres of mem_spare
119 * @iomem: hardware base address
120 * @config: I2C and gpio config from platform
122 * All non-local data is accessed via this structure.
126 struct v4l2_device v4l2_dev;
127 struct video_device *video_dev;
128 struct pci_dev *pdev;
129 struct i2c_adapter *adapter;
130 unsigned int register_save_area[IRQ_COUNT + SAVE_COUNT + AUX_COUNT];
131 struct v4l2_subdev *decoder;
132 struct v4l2_pix_format format;
137 struct mutex mutex; /* exclusive access during open */
138 spinlock_t slock; /* spin lock for hardware and queue access */
139 struct videobuf_queue vb_vidq;
140 struct list_head capture;
141 struct videobuf_buffer *active;
142 int started, closing, tcount, bcount;
145 dma_addr_t dma_spare;
147 struct vip_config *config;
150 static const unsigned int registers_to_save[AUX_COUNT] = {
151 DVP_HLFLN, DVP_RGB, DVP_PKZ
154 static struct v4l2_pix_format formats_50[] = {
155 { /*PAL interlaced */
158 .pixelformat = V4L2_PIX_FMT_UYVY,
159 .field = V4L2_FIELD_INTERLACED,
160 .bytesperline = 720 * 2,
161 .sizeimage = 720 * 2 * 576,
162 .colorspace = V4L2_COLORSPACE_SMPTE170M},
166 .pixelformat = V4L2_PIX_FMT_UYVY,
167 .field = V4L2_FIELD_TOP,
168 .bytesperline = 720 * 2,
169 .sizeimage = 720 * 2 * 288,
170 .colorspace = V4L2_COLORSPACE_SMPTE170M},
174 .pixelformat = V4L2_PIX_FMT_UYVY,
175 .field = V4L2_FIELD_BOTTOM,
176 .bytesperline = 720 * 2,
177 .sizeimage = 720 * 2 * 288,
178 .colorspace = V4L2_COLORSPACE_SMPTE170M},
182 static struct v4l2_pix_format formats_60[] = {
183 { /*NTSC interlaced */
186 .pixelformat = V4L2_PIX_FMT_UYVY,
187 .field = V4L2_FIELD_INTERLACED,
188 .bytesperline = 720 * 2,
189 .sizeimage = 720 * 2 * 480,
190 .colorspace = V4L2_COLORSPACE_SMPTE170M},
194 .pixelformat = V4L2_PIX_FMT_UYVY,
195 .field = V4L2_FIELD_TOP,
196 .bytesperline = 720 * 2,
197 .sizeimage = 720 * 2 * 240,
198 .colorspace = V4L2_COLORSPACE_SMPTE170M},
202 .pixelformat = V4L2_PIX_FMT_UYVY,
203 .field = V4L2_FIELD_BOTTOM,
204 .bytesperline = 720 * 2,
205 .sizeimage = 720 * 2 * 240,
206 .colorspace = V4L2_COLORSPACE_SMPTE170M},
210 * buf_setup - Get size and number of video buffer
211 * @vq: queue in videobuf
212 * @count: Number of buffers (1..MAX_FRAMES).
213 * 0 use default value.
214 * @size: size of buffer in bytes
216 * returns size and number of buffers
217 * a preset value of 0 returns the default number.
218 * return value: 0, always succesfull.
220 static int buf_setup(struct videobuf_queue *vq, unsigned int *count,
223 struct sta2x11_vip *vip = vq->priv_data;
225 *size = vip->format.width * vip->format.height * 2;
226 if (0 == *count || MAX_FRAMES < *count)
232 * buf_prepare - prepare buffer for usage
233 * @vq: queue in videobuf layer
234 * @vb: buffer to be prepared
235 * @field: type of video data (interlaced/non-interlaced)
237 * Allocate or realloc buffer
238 * return value: 0, successful.
240 * -EINVAL, supplied buffer is too small.
242 * other, buffer could not be locked.
244 static int buf_prepare(struct videobuf_queue *vq, struct videobuf_buffer *vb,
245 enum v4l2_field field)
247 struct sta2x11_vip *vip = vq->priv_data;
250 vb->size = vip->format.width * vip->format.height * 2;
251 if ((0 != vb->baddr) && (vb->bsize < vb->size))
253 vb->width = vip->format.width;
254 vb->height = vip->format.height;
257 if (VIDEOBUF_NEEDS_INIT == vb->state) {
258 ret = videobuf_iolock(vq, vb, NULL);
262 vb->state = VIDEOBUF_PREPARED;
265 videobuf_dma_contig_free(vq, vb);
266 vb->state = VIDEOBUF_NEEDS_INIT;
271 * buf_queu - queue buffer for filling
272 * @vq: queue in videobuf layer
273 * @vb: buffer to be queued
275 * if capturing is already running, the buffer will be queued. Otherwise
276 * capture is started and the buffer is used directly.
278 static void buf_queue(struct videobuf_queue *vq, struct videobuf_buffer *vb)
280 struct sta2x11_vip *vip = vq->priv_data;
283 vb->state = VIDEOBUF_QUEUED;
286 list_add_tail(&vb->queue, &vip->capture);
294 vb->state = VIDEOBUF_ACTIVE;
296 dma = videobuf_to_dma_contig(vb);
298 REG_WRITE(vip, DVP_TFO, (0 << 16) | (0));
299 /* despite of interlace mode, upper and lower frames start at zero */
300 REG_WRITE(vip, DVP_BFO, (0 << 16) | (0));
302 switch (vip->format.field) {
303 case V4L2_FIELD_INTERLACED:
304 REG_WRITE(vip, DVP_TFS,
305 ((vip->format.height / 2 - 1) << 16) |
306 (2 * vip->format.width - 1));
307 REG_WRITE(vip, DVP_BFS, ((vip->format.height / 2 - 1) << 16) |
308 (2 * vip->format.width - 1));
309 REG_WRITE(vip, DVP_VTP, dma);
310 REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2);
311 REG_WRITE(vip, DVP_VMP, 4 * vip->format.width);
314 REG_WRITE(vip, DVP_TFS,
315 ((vip->format.height - 1) << 16) |
316 (2 * vip->format.width - 1));
317 REG_WRITE(vip, DVP_BFS, ((0) << 16) |
318 (2 * vip->format.width - 1));
319 REG_WRITE(vip, DVP_VTP, dma);
320 REG_WRITE(vip, DVP_VBP, dma);
321 REG_WRITE(vip, DVP_VMP, 2 * vip->format.width);
323 case V4L2_FIELD_BOTTOM:
324 REG_WRITE(vip, DVP_TFS, ((0) << 16) |
325 (2 * vip->format.width - 1));
326 REG_WRITE(vip, DVP_BFS,
327 ((vip->format.height) << 16) |
328 (2 * vip->format.width - 1));
329 REG_WRITE(vip, DVP_VTP, dma);
330 REG_WRITE(vip, DVP_VBP, dma);
331 REG_WRITE(vip, DVP_VMP, 2 * vip->format.width);
335 pr_warning("VIP: unknown field format\n");
339 REG_WRITE(vip, DVP_CTL, DVP_CTL_ENA);
343 * buff_release - release buffer
344 * @vq: queue in videobuf layer
345 * @vb: buffer to be released
347 * release buffer in videobuf layer
349 static void buf_release(struct videobuf_queue *vq, struct videobuf_buffer *vb)
352 videobuf_dma_contig_free(vq, vb);
353 vb->state = VIDEOBUF_NEEDS_INIT;
356 static struct videobuf_queue_ops vip_qops = {
357 .buf_setup = buf_setup,
358 .buf_prepare = buf_prepare,
359 .buf_queue = buf_queue,
360 .buf_release = buf_release,
364 * vip_open - open video device
365 * @file: descriptor of device
367 * open device, make sure it is only opened once.
368 * return value: 0, no error.
370 * -EBUSY, device is already opened
372 * -ENOMEM, no memory for auxiliary DMA buffer
374 static int vip_open(struct file *file)
376 struct video_device *dev = video_devdata(file);
377 struct sta2x11_vip *vip = video_get_drvdata(dev);
379 mutex_lock(&vip->mutex);
382 if (vip->users > 1) {
384 mutex_unlock(&vip->mutex);
388 file->private_data = dev;
394 INIT_LIST_HEAD(&vip->capture);
395 vip->mem_spare = dma_alloc_coherent(&vip->pdev->dev, 64,
396 &vip->dma_spare, GFP_KERNEL);
397 if (!vip->mem_spare) {
399 mutex_unlock(&vip->mutex);
403 mutex_unlock(&vip->mutex);
404 videobuf_queue_dma_contig_init_cached(&vip->vb_vidq,
408 V4L2_BUF_TYPE_VIDEO_CAPTURE,
409 V4L2_FIELD_INTERLACED,
410 sizeof(struct videobuf_buffer),
412 REG_READ(vip, DVP_ITS);
413 REG_WRITE(vip, DVP_HLFLN, DVP_HLFLN_SD);
414 REG_WRITE(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
415 REG_WRITE(vip, DVP_CTL, DVP_CTL_RST);
416 REG_WRITE(vip, DVP_CTL, 0);
417 REG_READ(vip, DVP_ITS);
422 * vip_close - close video device
423 * @file: descriptor of device
425 * close video device, wait until all pending operations are finished
426 * ( maximum FRAME_MAX buffers pending )
427 * Turn off interrupts.
429 * return value: 0, always succesful.
431 static int vip_close(struct file *file)
433 struct video_device *dev = video_devdata(file);
434 struct sta2x11_vip *vip = video_get_drvdata(dev);
438 videobuf_waiton(&vip->vb_vidq, vip->active, 0, 0);
439 spin_lock_irq(&vip->slock);
441 REG_WRITE(vip, DVP_ITM, 0);
442 REG_WRITE(vip, DVP_CTL, DVP_CTL_RST);
443 REG_WRITE(vip, DVP_CTL, 0);
444 REG_READ(vip, DVP_ITS);
449 spin_unlock_irq(&vip->slock);
451 videobuf_stop(&vip->vb_vidq);
452 videobuf_mmap_free(&vip->vb_vidq);
454 dma_free_coherent(&vip->pdev->dev, 64, vip->mem_spare, vip->dma_spare);
455 file->private_data = NULL;
456 mutex_lock(&vip->mutex);
458 mutex_unlock(&vip->mutex);
463 * vip_read - read from video input
464 * @file: descriptor of device
466 * @count: number of bytes to be read
467 * @ppos: position within stream
469 * read video data from video device.
470 * handling is done in generic videobuf layer
471 * return value: provided by videobuf layer
473 static ssize_t vip_read(struct file *file, char __user *data,
474 size_t count, loff_t *ppos)
476 struct video_device *dev = file->private_data;
477 struct sta2x11_vip *vip = video_get_drvdata(dev);
479 return videobuf_read_stream(&vip->vb_vidq, data, count, ppos, 0,
480 file->f_flags & O_NONBLOCK);
484 * vip_mmap - map user buffer
485 * @file: descriptor of device
488 * map user space buffer into kernel mode, including DMA address.
489 * handling is done in generic videobuf layer.
490 * return value: provided by videobuf layer
492 static int vip_mmap(struct file *file, struct vm_area_struct *vma)
494 struct video_device *dev = file->private_data;
495 struct sta2x11_vip *vip = video_get_drvdata(dev);
497 return videobuf_mmap_mapper(&vip->vb_vidq, vma);
501 * vip_poll - poll for event
502 * @file: descriptor of device
503 * @wait: contains events to be waited for
505 * wait for event related to video device.
506 * handling is done in generic videobuf layer.
507 * return value: provided by videobuf layer
509 static unsigned int vip_poll(struct file *file, struct poll_table_struct *wait)
511 struct video_device *dev = file->private_data;
512 struct sta2x11_vip *vip = video_get_drvdata(dev);
514 return videobuf_poll_stream(file, &vip->vb_vidq, wait);
518 * vidioc_querycap - return capabilities of device
519 * @file: descriptor of device (not used)
520 * @priv: points to current videodevice
521 * @cap: contains return values
523 * the capabilities of the device are returned
525 * return value: 0, no error.
527 static int vidioc_querycap(struct file *file, void *priv,
528 struct v4l2_capability *cap)
530 struct video_device *dev = priv;
531 struct sta2x11_vip *vip = video_get_drvdata(dev);
533 memset(cap, 0, sizeof(struct v4l2_capability));
534 strcpy(cap->driver, DRV_NAME);
535 strcpy(cap->card, DRV_NAME);
537 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
538 pci_name(vip->pdev));
539 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
546 * vidioc_s_std - set video standard
547 * @file: descriptor of device (not used)
548 * @priv: points to current videodevice
549 * @std: contains standard to be set
551 * the video standard is set
553 * return value: 0, no error.
555 * -EIO, no input signal detected
557 * other, returned from video DAC.
559 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id *std)
561 struct video_device *dev = priv;
562 struct sta2x11_vip *vip = video_get_drvdata(dev);
563 v4l2_std_id oldstd = vip->std, newstd;
566 if (V4L2_STD_ALL == *std) {
567 v4l2_subdev_call(vip->decoder, core, s_std, *std);
569 v4l2_subdev_call(vip->decoder, video, querystd, &newstd);
570 v4l2_subdev_call(vip->decoder, video, g_input_status, &status);
571 if (status & V4L2_IN_ST_NO_SIGNAL)
573 *std = vip->std = newstd;
574 if (oldstd != *std) {
575 if (V4L2_STD_525_60 & (*std))
576 vip->format = formats_60[0];
578 vip->format = formats_50[0];
583 if (oldstd != *std) {
584 if (V4L2_STD_525_60 & (*std))
585 vip->format = formats_60[0];
587 vip->format = formats_50[0];
590 return v4l2_subdev_call(vip->decoder, core, s_std, *std);
594 * vidioc_g_std - get video standard
595 * @file: descriptor of device (not used)
596 * @priv: points to current videodevice
597 * @std: contains return values
599 * the current video standard is returned
601 * return value: 0, no error.
603 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
605 struct video_device *dev = priv;
606 struct sta2x11_vip *vip = video_get_drvdata(dev);
613 * vidioc_querystd - get possible video standards
614 * @file: descriptor of device (not used)
615 * @priv: points to current videodevice
616 * @std: contains return values
618 * all possible video standards are returned
620 * return value: delivered by video DAC routine.
622 static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *std)
624 struct video_device *dev = priv;
625 struct sta2x11_vip *vip = video_get_drvdata(dev);
627 return v4l2_subdev_call(vip->decoder, video, querystd, std);
632 * vidioc_queryctl - get possible control settings
633 * @file: descriptor of device (not used)
634 * @priv: points to current videodevice
635 * @ctrl: contains return values
637 * return possible values for a control
638 * return value: delivered by video DAC routine.
640 static int vidioc_queryctrl(struct file *file, void *priv,
641 struct v4l2_queryctrl *ctrl)
643 struct video_device *dev = priv;
644 struct sta2x11_vip *vip = video_get_drvdata(dev);
646 return v4l2_subdev_call(vip->decoder, core, queryctrl, ctrl);
650 * vidioc_g_ctl - get control value
651 * @file: descriptor of device (not used)
652 * @priv: points to current videodevice
653 * @ctrl: contains return values
655 * return setting for a control value
656 * return value: delivered by video DAC routine.
658 static int vidioc_g_ctrl(struct file *file, void *priv,
659 struct v4l2_control *ctrl)
661 struct video_device *dev = priv;
662 struct sta2x11_vip *vip = video_get_drvdata(dev);
664 return v4l2_subdev_call(vip->decoder, core, g_ctrl, ctrl);
668 * vidioc_s_ctl - set control value
669 * @file: descriptor of device (not used)
670 * @priv: points to current videodevice
671 * @ctrl: contains value to be set
673 * set value for a specific control
674 * return value: delivered by video DAC routine.
676 static int vidioc_s_ctrl(struct file *file, void *priv,
677 struct v4l2_control *ctrl)
679 struct video_device *dev = priv;
680 struct sta2x11_vip *vip = video_get_drvdata(dev);
682 return v4l2_subdev_call(vip->decoder, core, s_ctrl, ctrl);
686 * vidioc_enum_input - return name of input line
687 * @file: descriptor of device (not used)
688 * @priv: points to current videodevice
689 * @inp: contains return values
691 * the user friendly name of the input line is returned
693 * return value: 0, no error.
695 * -EINVAL, input line number out of range
697 static int vidioc_enum_input(struct file *file, void *priv,
698 struct v4l2_input *inp)
703 inp->type = V4L2_INPUT_TYPE_CAMERA;
704 inp->std = V4L2_STD_ALL;
705 sprintf(inp->name, "Camera %u", inp->index);
711 * vidioc_s_input - set input line
712 * @file: descriptor of device ( not used)
713 * @priv: points to current videodevice
714 * @i: new input line number
716 * the current active input line is set
718 * return value: 0, no error.
720 * -EINVAL, line number out of range
722 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
724 struct video_device *dev = priv;
725 struct sta2x11_vip *vip = video_get_drvdata(dev);
730 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
739 * vidioc_g_input - return input line
740 * @file: descriptor of device ( not used)
741 * @priv: points to current videodevice
742 * @i: returned input line number
744 * the current active input line is returned
746 * return value: always 0.
748 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
750 struct video_device *dev = priv;
751 struct sta2x11_vip *vip = video_get_drvdata(dev);
758 * vidioc_enum_fmt_vid_cap - return video capture format
759 * @file: descriptor of device ( not used)
760 * @priv: points to current videodevice
761 * @f: returned format information
763 * returns name and format of video capture
764 * Only UYVY is supported by hardware.
766 * return value: always 0.
768 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
769 struct v4l2_fmtdesc *f)
775 strcpy(f->description, "4:2:2, packed, UYVY");
776 f->pixelformat = V4L2_PIX_FMT_UYVY;
782 * vidioc_try_fmt_vid_cap - set video capture format
783 * @file: descriptor of device ( not used)
784 * @priv: points to current videodevice
787 * new video format is set which includes width and
788 * field type. width is fixed to 720, no scaling.
789 * Only UYVY is supported by this hardware.
790 * the minimum height is 200, the maximum is 576 (PAL)
792 * return value: 0, no error
794 * -EINVAL, pixel or field format not supported
797 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
798 struct v4l2_format *f)
800 struct video_device *dev = priv;
801 struct sta2x11_vip *vip = video_get_drvdata(dev);
804 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat)
807 if (V4L2_STD_525_60 & vip->std)
812 switch (f->fmt.pix.field) {
814 if (interlace_lim < f->fmt.pix.height)
815 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
817 f->fmt.pix.field = V4L2_FIELD_BOTTOM;
820 case V4L2_FIELD_BOTTOM:
821 if (interlace_lim < f->fmt.pix.height)
822 f->fmt.pix.height = interlace_lim;
824 case V4L2_FIELD_INTERLACED:
830 f->fmt.pix.height &= ~1;
831 if (2 * interlace_lim < f->fmt.pix.height)
832 f->fmt.pix.height = 2 * interlace_lim;
833 if (200 > f->fmt.pix.height)
834 f->fmt.pix.height = 200;
835 f->fmt.pix.width = 720;
836 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
837 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
838 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
844 * vidioc_s_fmt_vid_cap - set current video format parameters
845 * @file: descriptor of device ( not used)
846 * @priv: points to current videodevice
847 * @f: returned format information
849 * set new capture format
850 * return value: 0, no error
852 * other, delivered by video DAC routine.
854 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
855 struct v4l2_format *f)
857 struct video_device *dev = priv;
858 struct sta2x11_vip *vip = video_get_drvdata(dev);
861 ret = vidioc_try_fmt_vid_cap(file, priv, f);
865 memcpy(&vip->format, &f->fmt.pix, sizeof(struct v4l2_pix_format));
870 * vidioc_g_fmt_vid_cap - get current video format parameters
871 * @file: descriptor of device ( not used)
872 * @priv: points to current videodevice
873 * @f: contains format information
875 * returns current video format parameters
877 * return value: 0, always successful
879 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
880 struct v4l2_format *f)
882 struct video_device *dev = priv;
883 struct sta2x11_vip *vip = video_get_drvdata(dev);
885 memcpy(&f->fmt.pix, &vip->format, sizeof(struct v4l2_pix_format));
890 * vidioc_reqfs - request buffer
891 * @file: descriptor of device ( not used)
892 * @priv: points to current videodevice
895 * Handling is done in generic videobuf layer.
897 static int vidioc_reqbufs(struct file *file, void *priv,
898 struct v4l2_requestbuffers *p)
900 struct video_device *dev = priv;
901 struct sta2x11_vip *vip = video_get_drvdata(dev);
903 return videobuf_reqbufs(&vip->vb_vidq, p);
907 * vidioc_querybuf - query buffer
908 * @file: descriptor of device ( not used)
909 * @priv: points to current videodevice
912 * query buffer state.
913 * Handling is done in generic videobuf layer.
915 static int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
917 struct video_device *dev = priv;
918 struct sta2x11_vip *vip = video_get_drvdata(dev);
920 return videobuf_querybuf(&vip->vb_vidq, p);
924 * vidioc_qbuf - queue a buffer
925 * @file: descriptor of device ( not used)
926 * @priv: points to current videodevice
929 * Handling is done in generic videobuf layer.
931 static int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
933 struct video_device *dev = priv;
934 struct sta2x11_vip *vip = video_get_drvdata(dev);
936 return videobuf_qbuf(&vip->vb_vidq, p);
940 * vidioc_dqbuf - dequeue a buffer
941 * @file: descriptor of device ( not used)
942 * @priv: points to current videodevice
945 * Handling is done in generic videobuf layer.
947 static int vidioc_dqbuf(struct file *file, void *priv, struct v4l2_buffer *p)
949 struct video_device *dev = priv;
950 struct sta2x11_vip *vip = video_get_drvdata(dev);
952 return videobuf_dqbuf(&vip->vb_vidq, p, file->f_flags & O_NONBLOCK);
956 * vidioc_streamon - turn on streaming
957 * @file: descriptor of device ( not used)
958 * @priv: points to current videodevice
959 * @type: type of capture
962 * Handling is done in generic videobuf layer.
964 static int vidioc_streamon(struct file *file, void *priv,
965 enum v4l2_buf_type type)
967 struct video_device *dev = priv;
968 struct sta2x11_vip *vip = video_get_drvdata(dev);
970 return videobuf_streamon(&vip->vb_vidq);
974 * vidioc_streamoff - turn off streaming
975 * @file: descriptor of device ( not used)
976 * @priv: points to current videodevice
977 * @type: type of capture
979 * turn off streaming.
980 * Handling is done in generic videobuf layer.
982 static int vidioc_streamoff(struct file *file, void *priv,
983 enum v4l2_buf_type type)
985 struct video_device *dev = priv;
986 struct sta2x11_vip *vip = video_get_drvdata(dev);
988 return videobuf_streamoff(&vip->vb_vidq);
991 static const struct v4l2_file_operations vip_fops = {
992 .owner = THIS_MODULE,
994 .release = vip_close,
995 .ioctl = video_ioctl2,
1001 static const struct v4l2_ioctl_ops vip_ioctl_ops = {
1002 .vidioc_querycap = vidioc_querycap,
1003 .vidioc_s_std = vidioc_s_std,
1004 .vidioc_g_std = vidioc_g_std,
1005 .vidioc_querystd = vidioc_querystd,
1006 .vidioc_queryctrl = vidioc_queryctrl,
1007 .vidioc_g_ctrl = vidioc_g_ctrl,
1008 .vidioc_s_ctrl = vidioc_s_ctrl,
1009 .vidioc_enum_input = vidioc_enum_input,
1010 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
1011 .vidioc_s_input = vidioc_s_input,
1012 .vidioc_g_input = vidioc_g_input,
1013 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
1014 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
1015 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
1016 .vidioc_reqbufs = vidioc_reqbufs,
1017 .vidioc_querybuf = vidioc_querybuf,
1018 .vidioc_qbuf = vidioc_qbuf,
1019 .vidioc_dqbuf = vidioc_dqbuf,
1020 .vidioc_streamon = vidioc_streamon,
1021 .vidioc_streamoff = vidioc_streamoff,
1024 static struct video_device video_dev_template = {
1026 .release = video_device_release,
1028 .ioctl_ops = &vip_ioctl_ops,
1029 .tvnorms = V4L2_STD_ALL,
1033 * vip_irq - interrupt routine
1034 * @irq: Number of interrupt ( not used, correct number is assumed )
1035 * @vip: local data structure containing all information
1037 * check for both frame interrupts set ( top and bottom ).
1038 * check FIFO overflow, but limit number of log messages after open.
1039 * signal a complete buffer if done.
1040 * dequeue a new buffer if available.
1041 * disable VIP if no buffer available.
1043 * return value: IRQ_NONE, interrupt was not generated by VIP
1045 * IRQ_HANDLED, interrupt done.
1047 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip)
1050 unsigned long flags;
1051 struct videobuf_buffer *vb;
1053 status = REG_READ(vip, DVP_ITS);
1056 pr_debug("VIP: irq ignored\n");
1063 if (status & DVP_IT_VSB)
1066 if (status & DVP_IT_VST)
1069 if ((DVP_IT_VSB | DVP_IT_VST) == (status & (DVP_IT_VST | DVP_IT_VSB))) {
1070 /* this is bad, we are too slow, hope the condition is gone
1071 * on the next frame */
1072 pr_info("VIP: both irqs\n");
1076 if (status & DVP_IT_FIFO) {
1077 if (5 > vip->overflow++)
1078 pr_info("VIP: fifo overflow\n");
1081 if (2 > vip->tcount)
1084 if (status & DVP_IT_VSB)
1087 spin_lock_irqsave(&vip->slock, flags);
1089 REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) & ~DVP_CTL_ENA);
1091 do_gettimeofday(&vip->active->ts);
1092 vip->active->field_count++;
1093 vip->active->state = VIDEOBUF_DONE;
1094 wake_up(&vip->active->done);
1097 if (!vip->closing) {
1098 if (list_empty(&vip->capture))
1101 vb = list_first_entry(&vip->capture, struct videobuf_buffer,
1104 pr_info("VIP: no buffer\n");
1107 vb->state = VIDEOBUF_ACTIVE;
1108 list_del(&vb->queue);
1110 dma = videobuf_to_dma_contig(vb);
1111 switch (vip->format.field) {
1112 case V4L2_FIELD_INTERLACED:
1113 REG_WRITE(vip, DVP_VTP, dma);
1114 REG_WRITE(vip, DVP_VBP, dma + vip->format.width * 2);
1116 case V4L2_FIELD_TOP:
1117 case V4L2_FIELD_BOTTOM:
1118 REG_WRITE(vip, DVP_VTP, dma);
1119 REG_WRITE(vip, DVP_VBP, dma);
1122 pr_warning("VIP: unknown field format\n");
1126 REG_WRITE(vip, DVP_CTL, REG_READ(vip, DVP_CTL) | DVP_CTL_ENA);
1129 spin_unlock_irqrestore(&vip->slock, flags);
1134 * vip_gpio_reserve - reserve gpio pin
1136 * @pin: GPIO pin number
1137 * @dir: direction, input or output
1138 * @name: GPIO pin name
1141 static int vip_gpio_reserve(struct device *dev, int pin, int dir,
1149 ret = gpio_request(pin, name);
1151 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
1155 ret = gpio_direction_output(pin, dir);
1157 dev_err(dev, "Failed to set direction for pin %d (%s)\n",
1163 ret = gpio_export(pin, false);
1165 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
1174 * vip_gpio_release - release gpio pin
1176 * @pin: GPIO pin number
1177 * @name: GPIO pin name
1180 static void vip_gpio_release(struct device *dev, int pin, const char *name)
1183 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
1190 * sta2x11_vip_init_one - init one instance of video device
1194 * allocate reset pins for DAC.
1195 * Reset video DAC, this is done via reset line.
1196 * allocate memory for managing device
1200 * find and initialize video DAC
1202 * return value: 0, no error
1204 * -ENOMEM, no memory
1206 * -ENODEV, device could not be detected or registered
1208 static int sta2x11_vip_init_one(struct pci_dev *pdev,
1209 const struct pci_device_id *ent)
1212 struct sta2x11_vip *vip;
1213 struct vip_config *config;
1215 ret = pci_enable_device(pdev);
1219 config = dev_get_platdata(&pdev->dev);
1221 dev_info(&pdev->dev, "VIP slot disabled\n");
1226 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
1231 if (config->reset_pin >= 0) {
1232 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
1233 config->reset_name);
1235 vip_gpio_release(&pdev->dev, config->pwr_pin,
1241 if (config->pwr_pin != -1) {
1242 /* Datasheet says 5ms between PWR and RST */
1243 usleep_range(5000, 25000);
1244 ret = gpio_direction_output(config->pwr_pin, 1);
1247 if (config->reset_pin != -1) {
1248 /* Datasheet says 5ms between PWR and RST */
1249 usleep_range(5000, 25000);
1250 ret = gpio_direction_output(config->reset_pin, 1);
1252 usleep_range(5000, 25000);
1254 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL);
1261 vip->std = V4L2_STD_PAL;
1262 vip->format = formats_50[0];
1263 vip->config = config;
1265 if (v4l2_device_register(&pdev->dev, &vip->v4l2_dev))
1268 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1269 (unsigned long)pci_resource_start(pdev, 0),
1270 (unsigned long)pci_resource_len(pdev, 0), pdev->irq);
1272 pci_set_master(pdev);
1274 ret = pci_request_regions(pdev, DRV_NAME);
1278 vip->iomem = pci_iomap(pdev, 0, 0x100);
1280 ret = -ENOMEM; /* FIXME */
1284 pci_enable_msi(pdev);
1286 INIT_LIST_HEAD(&vip->capture);
1287 spin_lock_init(&vip->slock);
1288 mutex_init(&vip->mutex);
1292 ret = request_irq(pdev->irq,
1293 (irq_handler_t) vip_irq,
1294 IRQF_SHARED, DRV_NAME, vip);
1296 dev_err(&pdev->dev, "request_irq failed\n");
1301 vip->video_dev = video_device_alloc();
1302 if (!vip->video_dev) {
1307 *(vip->video_dev) = video_dev_template;
1308 video_set_drvdata(vip->video_dev, vip);
1310 ret = video_register_device(vip->video_dev, VFL_TYPE_GRABBER, -1);
1314 vip->adapter = i2c_get_adapter(vip->config->i2c_id);
1315 if (!vip->adapter) {
1317 dev_err(&pdev->dev, "no I2C adapter found\n");
1321 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter,
1322 "adv7180", vip->config->i2c_addr,
1324 if (!vip->decoder) {
1326 dev_err(&pdev->dev, "no decoder found\n");
1330 i2c_put_adapter(vip->adapter);
1332 v4l2_subdev_call(vip->decoder, core, init, 0);
1334 pr_info("STA2X11 Video Input Port (VIP) loaded\n");
1338 video_set_drvdata(vip->video_dev, NULL);
1340 if (video_is_registered(vip->video_dev))
1341 video_unregister_device(vip->video_dev);
1343 video_device_release(vip->video_dev);
1345 free_irq(pdev->irq, vip);
1346 pci_disable_msi(pdev);
1348 pci_iounmap(pdev, vip->iomem);
1349 mutex_destroy(&vip->mutex);
1351 pci_release_regions(pdev);
1353 v4l2_device_unregister(&vip->v4l2_dev);
1357 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name);
1358 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name);
1361 * do not call pci_disable_device on sta2x11 because it break all
1362 * other Bus masters on this EP
1368 * sta2x11_vip_remove_one - release device
1371 * Undo everything done in .._init_one
1373 * unregister video device
1379 static void sta2x11_vip_remove_one(struct pci_dev *pdev)
1381 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1382 struct sta2x11_vip *vip =
1383 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1385 video_set_drvdata(vip->video_dev, NULL);
1386 video_unregister_device(vip->video_dev);
1387 /*do not call video_device_release() here, is already done */
1388 free_irq(pdev->irq, vip);
1389 pci_disable_msi(pdev);
1390 pci_iounmap(pdev, vip->iomem);
1391 pci_release_regions(pdev);
1393 v4l2_device_unregister(&vip->v4l2_dev);
1394 mutex_destroy(&vip->mutex);
1396 vip_gpio_release(&pdev->dev, vip->config->pwr_pin,
1397 vip->config->pwr_name);
1398 vip_gpio_release(&pdev->dev, vip->config->reset_pin,
1399 vip->config->reset_name);
1403 * do not call pci_disable_device on sta2x11 because it break all
1404 * other Bus masters on this EP
1411 * sta2x11_vip_suspend - set device into power save mode
1413 * @state: new state of device
1415 * all relevant registers are saved and an attempt to set a new state is made.
1417 * return value: 0 always indicate success,
1418 * even if device could not be disabled. (workaround for hardware problem)
1420 * reurn value : 0, always succesful, even if hardware does not not support
1423 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state)
1425 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1426 struct sta2x11_vip *vip =
1427 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1428 unsigned long flags;
1431 spin_lock_irqsave(&vip->slock, flags);
1432 vip->register_save_area[0] = REG_READ(vip, DVP_CTL);
1433 REG_WRITE(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS);
1434 vip->register_save_area[SAVE_COUNT] = REG_READ(vip, DVP_ITM);
1435 REG_WRITE(vip, DVP_ITM, 0);
1436 for (i = 1; i < SAVE_COUNT; i++)
1437 vip->register_save_area[i] = REG_READ(vip, 4 * i);
1438 for (i = 0; i < AUX_COUNT; i++)
1439 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] =
1440 REG_READ(vip, registers_to_save[i]);
1441 spin_unlock_irqrestore(&vip->slock, flags);
1442 /* save pci state */
1443 pci_save_state(pdev);
1444 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) {
1446 * do not call pci_disable_device on sta2x11 because it
1447 * break all other Bus masters on this EP
1452 pr_info("VIP: suspend\n");
1457 * sta2x11_vip_resume - resume device operation
1458 * @pdev : PCI device
1460 * re-enable device, set PCI state to powered and restore registers.
1461 * resume normal device operation afterwards.
1463 * return value: 0, no error.
1465 * other, could not set device to power on state.
1467 static int sta2x11_vip_resume(struct pci_dev *pdev)
1469 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1470 struct sta2x11_vip *vip =
1471 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1472 unsigned long flags;
1475 pr_info("VIP: resume\n");
1476 /* restore pci state */
1477 if (vip->disabled) {
1478 ret = pci_enable_device(pdev);
1480 pr_warning("VIP: Can't enable device.\n");
1485 ret = pci_set_power_state(pdev, PCI_D0);
1488 * do not call pci_disable_device on sta2x11 because it
1489 * break all other Bus masters on this EP
1491 pr_warning("VIP: Can't enable device.\n");
1496 pci_restore_state(pdev);
1498 spin_lock_irqsave(&vip->slock, flags);
1499 for (i = 1; i < SAVE_COUNT; i++)
1500 REG_WRITE(vip, 4 * i, vip->register_save_area[i]);
1501 for (i = 0; i < AUX_COUNT; i++)
1502 REG_WRITE(vip, registers_to_save[i],
1503 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]);
1504 REG_WRITE(vip, DVP_CTL, vip->register_save_area[0]);
1505 REG_WRITE(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]);
1506 spin_unlock_irqrestore(&vip->slock, flags);
1512 static DEFINE_PCI_DEVICE_TABLE(sta2x11_vip_pci_tbl) = {
1513 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)},
1517 static struct pci_driver sta2x11_vip_driver = {
1519 .probe = sta2x11_vip_init_one,
1520 .remove = sta2x11_vip_remove_one,
1521 .id_table = sta2x11_vip_pci_tbl,
1523 .suspend = sta2x11_vip_suspend,
1524 .resume = sta2x11_vip_resume,
1528 static int __init sta2x11_vip_init_module(void)
1530 return pci_register_driver(&sta2x11_vip_driver);
1533 static void __exit sta2x11_vip_exit_module(void)
1535 pci_unregister_driver(&sta2x11_vip_driver);
1539 module_init(sta2x11_vip_init_module);
1540 module_exit(sta2x11_vip_exit_module);
1542 late_initcall_sync(sta2x11_vip_init_module);
1545 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1546 MODULE_AUTHOR("Wind River");
1547 MODULE_LICENSE("GPL v2");
1548 MODULE_SUPPORTED_DEVICE("sta2x11 video input");
1549 MODULE_VERSION(DRV_VERSION);
1550 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);