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 */
148 struct mutex v4l_lock;
150 /* Interrupt counters */
154 void __iomem *iomem; /* I/O Memory */
155 struct vip_config *config;
158 static const unsigned int registers_to_save[AUX_COUNT] = {
159 DVP_HLFLN, DVP_RGB, DVP_PKZ
162 static struct v4l2_pix_format formats_50[] = {
163 { /*PAL interlaced */
166 .pixelformat = V4L2_PIX_FMT_UYVY,
167 .field = V4L2_FIELD_INTERLACED,
168 .bytesperline = 720 * 2,
169 .sizeimage = 720 * 2 * 576,
170 .colorspace = V4L2_COLORSPACE_SMPTE170M},
174 .pixelformat = V4L2_PIX_FMT_UYVY,
175 .field = V4L2_FIELD_TOP,
176 .bytesperline = 720 * 2,
177 .sizeimage = 720 * 2 * 288,
178 .colorspace = V4L2_COLORSPACE_SMPTE170M},
182 .pixelformat = V4L2_PIX_FMT_UYVY,
183 .field = V4L2_FIELD_BOTTOM,
184 .bytesperline = 720 * 2,
185 .sizeimage = 720 * 2 * 288,
186 .colorspace = V4L2_COLORSPACE_SMPTE170M},
190 static struct v4l2_pix_format formats_60[] = {
191 { /*NTSC interlaced */
194 .pixelformat = V4L2_PIX_FMT_UYVY,
195 .field = V4L2_FIELD_INTERLACED,
196 .bytesperline = 720 * 2,
197 .sizeimage = 720 * 2 * 480,
198 .colorspace = V4L2_COLORSPACE_SMPTE170M},
202 .pixelformat = V4L2_PIX_FMT_UYVY,
203 .field = V4L2_FIELD_TOP,
204 .bytesperline = 720 * 2,
205 .sizeimage = 720 * 2 * 240,
206 .colorspace = V4L2_COLORSPACE_SMPTE170M},
210 .pixelformat = V4L2_PIX_FMT_UYVY,
211 .field = V4L2_FIELD_BOTTOM,
212 .bytesperline = 720 * 2,
213 .sizeimage = 720 * 2 * 240,
214 .colorspace = V4L2_COLORSPACE_SMPTE170M},
217 /* Write VIP register */
218 static inline void reg_write(struct sta2x11_vip *vip, unsigned int reg, u32 val)
220 iowrite32((val), (vip->iomem)+(reg));
222 /* Read VIP register */
223 static inline u32 reg_read(struct sta2x11_vip *vip, unsigned int reg)
225 return ioread32((vip->iomem)+(reg));
227 /* Start DMA acquisition */
228 static void start_dma(struct sta2x11_vip *vip, struct vip_buffer *vip_buf)
230 unsigned long offset = 0;
232 if (vip->format.field == V4L2_FIELD_INTERLACED)
233 offset = vip->format.width * 2;
235 spin_lock_irq(&vip->slock);
236 /* Enable acquisition */
237 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) | DVP_CTL_ENA);
238 /* Set Top and Bottom Field memory address */
239 reg_write(vip, DVP_VTP, (u32)vip_buf->dma);
240 reg_write(vip, DVP_VBP, (u32)vip_buf->dma + offset);
241 spin_unlock_irq(&vip->slock);
244 /* Fetch the next buffer to activate */
245 static void vip_active_buf_next(struct sta2x11_vip *vip)
247 /* Get the next buffer */
248 spin_lock(&vip->lock);
249 if (list_empty(&vip->buffer_list)) {/* No available buffer */
250 spin_unlock(&vip->lock);
253 vip->active = list_first_entry(&vip->buffer_list,
256 /* Reset Top and Bottom counter */
259 spin_unlock(&vip->lock);
260 if (vb2_is_streaming(&vip->vb_vidq)) { /* streaming is on */
261 start_dma(vip, vip->active); /* start dma capture */
266 /* Videobuf2 Operations */
267 static int queue_setup(struct vb2_queue *vq,
268 unsigned int *nbuffers, unsigned int *nplanes,
269 unsigned int sizes[], struct device *alloc_devs[])
271 struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
273 if (!(*nbuffers) || *nbuffers < MAX_FRAMES)
274 *nbuffers = MAX_FRAMES;
277 sizes[0] = vip->format.sizeimage;
286 static int buffer_init(struct vb2_buffer *vb)
288 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
289 struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
291 vip_buf->dma = vb2_dma_contig_plane_dma_addr(vb, 0);
292 INIT_LIST_HEAD(&vip_buf->list);
296 static int buffer_prepare(struct vb2_buffer *vb)
298 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
299 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
300 struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
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.vb2_buf, 0, size);
314 static void buffer_queue(struct vb2_buffer *vb)
316 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
317 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
318 struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
320 spin_lock(&vip->lock);
321 list_add_tail(&vip_buf->list, &vip->buffer_list);
322 if (!vip->active) { /* No active buffer, active the first one */
323 vip->active = list_first_entry(&vip->buffer_list,
326 if (vb2_is_streaming(&vip->vb_vidq)) /* streaming is on */
327 start_dma(vip, vip_buf); /* start dma capture */
329 spin_unlock(&vip->lock);
331 static void buffer_finish(struct vb2_buffer *vb)
333 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
334 struct sta2x11_vip *vip = vb2_get_drv_priv(vb->vb2_queue);
335 struct vip_buffer *vip_buf = to_vip_buffer(vbuf);
337 /* Buffer handled, remove it from the list */
338 spin_lock(&vip->lock);
339 list_del_init(&vip_buf->list);
340 spin_unlock(&vip->lock);
342 if (vb2_is_streaming(vb->vb2_queue))
343 vip_active_buf_next(vip);
346 static int start_streaming(struct vb2_queue *vq, unsigned int count)
348 struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
350 spin_lock_irq(&vip->slock);
351 /* Enable interrupt VSYNC Top and Bottom*/
352 reg_write(vip, DVP_ITM, DVP_IT_VSB | DVP_IT_VST);
353 spin_unlock_irq(&vip->slock);
356 start_dma(vip, vip->active);
361 /* abort streaming and wait for last buffer */
362 static void stop_streaming(struct vb2_queue *vq)
364 struct sta2x11_vip *vip = vb2_get_drv_priv(vq);
365 struct vip_buffer *vip_buf, *node;
367 /* Disable acquisition */
368 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
369 /* Disable all interrupts */
370 reg_write(vip, DVP_ITM, 0);
372 /* Release all active buffers */
373 spin_lock(&vip->lock);
374 list_for_each_entry_safe(vip_buf, node, &vip->buffer_list, list) {
375 vb2_buffer_done(&vip_buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
376 list_del(&vip_buf->list);
378 spin_unlock(&vip->lock);
381 static const struct vb2_ops vip_video_qops = {
382 .queue_setup = queue_setup,
383 .buf_init = buffer_init,
384 .buf_prepare = buffer_prepare,
385 .buf_finish = buffer_finish,
386 .buf_queue = buffer_queue,
387 .start_streaming = start_streaming,
388 .stop_streaming = stop_streaming,
389 .wait_prepare = vb2_ops_wait_prepare,
390 .wait_finish = vb2_ops_wait_finish,
394 /* File Operations */
395 static const struct v4l2_file_operations vip_fops = {
396 .owner = THIS_MODULE,
397 .open = v4l2_fh_open,
398 .release = vb2_fop_release,
399 .unlocked_ioctl = video_ioctl2,
400 .read = vb2_fop_read,
401 .mmap = vb2_fop_mmap,
407 * vidioc_querycap - return capabilities of device
408 * @file: descriptor of device
409 * @cap: contains return values
412 * the capabilities of the device are returned
414 * return value: 0, no error.
416 static int vidioc_querycap(struct file *file, void *priv,
417 struct v4l2_capability *cap)
419 struct sta2x11_vip *vip = video_drvdata(file);
421 strcpy(cap->driver, KBUILD_MODNAME);
422 strcpy(cap->card, KBUILD_MODNAME);
423 snprintf(cap->bus_info, sizeof(cap->bus_info), "PCI:%s",
424 pci_name(vip->pdev));
425 cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE |
427 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
433 * vidioc_s_std - set video standard
434 * @file: descriptor of device
435 * @std: contains standard to be set
438 * the video standard is set
440 * return value: 0, no error.
442 * -EIO, no input signal detected
444 * other, returned from video DAC.
446 static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id std)
448 struct sta2x11_vip *vip = video_drvdata(file);
451 * This is here for backwards compatibility only.
452 * The use of V4L2_STD_ALL to trigger a querystd is non-standard.
454 if (std == V4L2_STD_ALL) {
455 v4l2_subdev_call(vip->decoder, video, querystd, &std);
456 if (std == V4L2_STD_UNKNOWN)
460 if (vip->std != std) {
462 if (V4L2_STD_525_60 & std)
463 vip->format = formats_60[0];
465 vip->format = formats_50[0];
468 return v4l2_subdev_call(vip->decoder, video, s_std, std);
472 * vidioc_g_std - get video standard
473 * @file: descriptor of device
475 * @std: contains return values
477 * the current video standard is returned
479 * return value: 0, no error.
481 static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *std)
483 struct sta2x11_vip *vip = video_drvdata(file);
490 * vidioc_querystd - get possible video standards
491 * @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
523 * @i: new input line number
525 * the current active input line is set
527 * return value: 0, no error.
529 * -EINVAL, line number out of range
531 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
533 struct sta2x11_vip *vip = video_drvdata(file);
538 ret = v4l2_subdev_call(vip->decoder, video, s_routing, i, 0, 0);
547 * vidioc_g_input - return input line
548 * @file: descriptor of device
550 * @i: returned input line number
552 * the current active input line is returned
554 * return value: always 0.
556 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
558 struct sta2x11_vip *vip = video_drvdata(file);
565 * vidioc_enum_fmt_vid_cap - return video capture format
566 * @file: descriptor of device
568 * @f: returned format information
570 * returns name and format of video capture
571 * Only UYVY is supported by hardware.
573 * return value: always 0.
575 static int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
576 struct v4l2_fmtdesc *f)
582 strcpy(f->description, "4:2:2, packed, UYVY");
583 f->pixelformat = V4L2_PIX_FMT_UYVY;
589 * vidioc_try_fmt_vid_cap - set video capture format
590 * @file: descriptor of device
594 * new video format is set which includes width and
595 * field type. width is fixed to 720, no scaling.
596 * Only UYVY is supported by this hardware.
597 * the minimum height is 200, the maximum is 576 (PAL)
599 * return value: 0, no error
601 * -EINVAL, pixel or field format not supported
604 static int vidioc_try_fmt_vid_cap(struct file *file, void *priv,
605 struct v4l2_format *f)
607 struct sta2x11_vip *vip = video_drvdata(file);
610 if (V4L2_PIX_FMT_UYVY != f->fmt.pix.pixelformat) {
611 v4l2_warn(&vip->v4l2_dev, "Invalid format, only UYVY supported\n");
615 if (V4L2_STD_525_60 & vip->std)
620 switch (f->fmt.pix.field) {
623 if (interlace_lim < f->fmt.pix.height)
624 f->fmt.pix.field = V4L2_FIELD_INTERLACED;
626 f->fmt.pix.field = V4L2_FIELD_BOTTOM;
629 case V4L2_FIELD_BOTTOM:
630 if (interlace_lim < f->fmt.pix.height)
631 f->fmt.pix.height = interlace_lim;
633 case V4L2_FIELD_INTERLACED:
637 /* It is the only supported format */
638 f->fmt.pix.pixelformat = V4L2_PIX_FMT_UYVY;
639 f->fmt.pix.height &= ~1;
640 if (2 * interlace_lim < f->fmt.pix.height)
641 f->fmt.pix.height = 2 * interlace_lim;
642 if (200 > f->fmt.pix.height)
643 f->fmt.pix.height = 200;
644 f->fmt.pix.width = 720;
645 f->fmt.pix.bytesperline = f->fmt.pix.width * 2;
646 f->fmt.pix.sizeimage = f->fmt.pix.width * 2 * f->fmt.pix.height;
647 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
652 * vidioc_s_fmt_vid_cap - set current video format parameters
653 * @file: descriptor of device
655 * @f: returned format information
657 * set new capture format
658 * return value: 0, no error
660 * other, delivered by video DAC routine.
662 static int vidioc_s_fmt_vid_cap(struct file *file, void *priv,
663 struct v4l2_format *f)
665 struct sta2x11_vip *vip = video_drvdata(file);
666 unsigned int t_stop, b_stop, pitch;
669 ret = vidioc_try_fmt_vid_cap(file, priv, f);
673 if (vb2_is_busy(&vip->vb_vidq)) {
674 /* Can't change format during acquisition */
675 v4l2_err(&vip->v4l2_dev, "device busy\n");
678 vip->format = f->fmt.pix;
679 switch (vip->format.field) {
680 case V4L2_FIELD_INTERLACED:
681 t_stop = ((vip->format.height / 2 - 1) << 16) |
682 (2 * vip->format.width - 1);
684 pitch = 4 * vip->format.width;
687 t_stop = ((vip->format.height - 1) << 16) |
688 (2 * vip->format.width - 1);
689 b_stop = (0 << 16) | (2 * vip->format.width - 1);
690 pitch = 2 * vip->format.width;
692 case V4L2_FIELD_BOTTOM:
693 t_stop = (0 << 16) | (2 * vip->format.width - 1);
694 b_stop = (vip->format.height << 16) |
695 (2 * vip->format.width - 1);
696 pitch = 2 * vip->format.width;
699 v4l2_err(&vip->v4l2_dev, "unknown field format\n");
703 spin_lock_irq(&vip->slock);
704 /* Y-X Top Field Offset */
705 reg_write(vip, DVP_TFO, 0);
706 /* Y-X Bottom Field Offset */
707 reg_write(vip, DVP_BFO, 0);
708 /* Y-X Top Field Stop*/
709 reg_write(vip, DVP_TFS, t_stop);
710 /* Y-X Bottom Field Stop */
711 reg_write(vip, DVP_BFS, b_stop);
712 /* Video Memory Pitch */
713 reg_write(vip, DVP_VMP, pitch);
714 spin_unlock_irq(&vip->slock);
720 * vidioc_g_fmt_vid_cap - get current video format parameters
721 * @file: descriptor of device
723 * @f: contains format information
725 * returns current video format parameters
727 * return value: 0, always successful
729 static int vidioc_g_fmt_vid_cap(struct file *file, void *priv,
730 struct v4l2_format *f)
732 struct sta2x11_vip *vip = video_drvdata(file);
734 f->fmt.pix = vip->format;
739 static const struct v4l2_ioctl_ops vip_ioctl_ops = {
740 .vidioc_querycap = vidioc_querycap,
742 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap,
743 .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap,
744 .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap,
745 .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap,
746 /* Buffer handlers */
747 .vidioc_create_bufs = vb2_ioctl_create_bufs,
748 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
749 .vidioc_reqbufs = vb2_ioctl_reqbufs,
750 .vidioc_querybuf = vb2_ioctl_querybuf,
751 .vidioc_qbuf = vb2_ioctl_qbuf,
752 .vidioc_dqbuf = vb2_ioctl_dqbuf,
754 .vidioc_streamon = vb2_ioctl_streamon,
755 .vidioc_streamoff = vb2_ioctl_streamoff,
756 /* Standard handling */
757 .vidioc_g_std = vidioc_g_std,
758 .vidioc_s_std = vidioc_s_std,
759 .vidioc_querystd = vidioc_querystd,
761 .vidioc_enum_input = vidioc_enum_input,
762 .vidioc_g_input = vidioc_g_input,
763 .vidioc_s_input = vidioc_s_input,
764 /* Log status ioctl */
765 .vidioc_log_status = v4l2_ctrl_log_status,
767 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
768 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
771 static const struct video_device video_dev_template = {
772 .name = KBUILD_MODNAME,
773 .release = video_device_release_empty,
775 .ioctl_ops = &vip_ioctl_ops,
776 .tvnorms = V4L2_STD_ALL,
780 * vip_irq - interrupt routine
781 * @irq: Number of interrupt ( not used, correct number is assumed )
782 * @vip: local data structure containing all information
784 * check for both frame interrupts set ( top and bottom ).
785 * check FIFO overflow, but limit number of log messages after open.
786 * signal a complete buffer if done
788 * return value: IRQ_NONE, interrupt was not generated by VIP
790 * IRQ_HANDLED, interrupt done.
792 static irqreturn_t vip_irq(int irq, struct sta2x11_vip *vip)
796 status = reg_read(vip, DVP_ITS);
798 if (!status) /* No interrupt to handle */
801 if (status & DVP_IT_FIFO)
802 if (vip->overflow++ > 5)
803 pr_info("VIP: fifo overflow\n");
805 if ((status & DVP_IT_VST) && (status & DVP_IT_VSB)) {
806 /* this is bad, we are too slow, hope the condition is gone
807 * on the next frame */
811 if (status & DVP_IT_VST)
812 if ((++vip->tcount) < 2)
814 if (status & DVP_IT_VSB) {
819 if (vip->active) { /* Acquisition is over on this buffer */
820 /* Disable acquisition */
821 reg_write(vip, DVP_CTL, reg_read(vip, DVP_CTL) & ~DVP_CTL_ENA);
822 /* Remove the active buffer from the list */
823 vip->active->vb.vb2_buf.timestamp = ktime_get_ns();
824 vip->active->vb.sequence = vip->sequence++;
825 vb2_buffer_done(&vip->active->vb.vb2_buf, VB2_BUF_STATE_DONE);
831 static void sta2x11_vip_init_register(struct sta2x11_vip *vip)
833 /* Register initialization */
834 spin_lock_irq(&vip->slock);
835 /* Clean interrupt */
836 reg_read(vip, DVP_ITS);
837 /* Enable Half Line per vertical */
838 reg_write(vip, DVP_HLFLN, DVP_HLFLN_SD);
839 /* Reset VIP control */
840 reg_write(vip, DVP_CTL, DVP_CTL_RST);
841 /* Clear VIP control */
842 reg_write(vip, DVP_CTL, 0);
843 spin_unlock_irq(&vip->slock);
845 static void sta2x11_vip_clear_register(struct sta2x11_vip *vip)
847 spin_lock_irq(&vip->slock);
848 /* Disable interrupt */
849 reg_write(vip, DVP_ITM, 0);
850 /* Reset VIP Control */
851 reg_write(vip, DVP_CTL, DVP_CTL_RST);
852 /* Clear VIP Control */
853 reg_write(vip, DVP_CTL, 0);
854 /* Clean VIP Interrupt */
855 reg_read(vip, DVP_ITS);
856 spin_unlock_irq(&vip->slock);
858 static int sta2x11_vip_init_buffer(struct sta2x11_vip *vip)
862 err = dma_set_coherent_mask(&vip->pdev->dev, DMA_BIT_MASK(29));
864 v4l2_err(&vip->v4l2_dev, "Cannot configure coherent mask");
867 memset(&vip->vb_vidq, 0, sizeof(struct vb2_queue));
868 vip->vb_vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
869 vip->vb_vidq.io_modes = VB2_MMAP | VB2_READ;
870 vip->vb_vidq.drv_priv = vip;
871 vip->vb_vidq.buf_struct_size = sizeof(struct vip_buffer);
872 vip->vb_vidq.ops = &vip_video_qops;
873 vip->vb_vidq.mem_ops = &vb2_dma_contig_memops;
874 vip->vb_vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
875 vip->vb_vidq.dev = &vip->pdev->dev;
876 vip->vb_vidq.lock = &vip->v4l_lock;
877 err = vb2_queue_init(&vip->vb_vidq);
880 INIT_LIST_HEAD(&vip->buffer_list);
881 spin_lock_init(&vip->lock);
885 static int sta2x11_vip_init_controls(struct sta2x11_vip *vip)
888 * Inititialize an empty control so VIP can inerithing controls
891 v4l2_ctrl_handler_init(&vip->ctrl_hdl, 0);
893 vip->v4l2_dev.ctrl_handler = &vip->ctrl_hdl;
894 if (vip->ctrl_hdl.error) {
895 int err = vip->ctrl_hdl.error;
897 v4l2_ctrl_handler_free(&vip->ctrl_hdl);
905 * vip_gpio_reserve - reserve gpio pin
907 * @pin: GPIO pin number
908 * @dir: direction, input or output
909 * @name: GPIO pin name
912 static int vip_gpio_reserve(struct device *dev, int pin, int dir,
917 if (!gpio_is_valid(pin))
920 ret = gpio_request(pin, name);
922 dev_err(dev, "Failed to allocate pin %d (%s)\n", pin, name);
926 ret = gpio_direction_output(pin, dir);
928 dev_err(dev, "Failed to set direction for pin %d (%s)\n",
934 ret = gpio_export(pin, false);
936 dev_err(dev, "Failed to export pin %d (%s)\n", pin, name);
945 * vip_gpio_release - release gpio pin
947 * @pin: GPIO pin number
948 * @name: GPIO pin name
951 static void vip_gpio_release(struct device *dev, int pin, const char *name)
953 if (gpio_is_valid(pin)) {
954 dev_dbg(dev, "releasing pin %d (%s)\n", pin, name);
961 * sta2x11_vip_init_one - init one instance of video device
965 * allocate reset pins for DAC.
966 * Reset video DAC, this is done via reset line.
967 * allocate memory for managing device
971 * find and initialize video DAC
973 * return value: 0, no error
977 * -ENODEV, device could not be detected or registered
979 static int sta2x11_vip_init_one(struct pci_dev *pdev,
980 const struct pci_device_id *ent)
983 struct sta2x11_vip *vip;
984 struct vip_config *config;
986 /* Check if hardware support 26-bit DMA */
987 if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(26))) {
988 dev_err(&pdev->dev, "26-bit DMA addressing not available\n");
992 ret = pci_enable_device(pdev);
996 /* Get VIP platform data */
997 config = dev_get_platdata(&pdev->dev);
999 dev_info(&pdev->dev, "VIP slot disabled\n");
1004 /* Power configuration */
1005 ret = vip_gpio_reserve(&pdev->dev, config->pwr_pin, 0,
1010 ret = vip_gpio_reserve(&pdev->dev, config->reset_pin, 0,
1011 config->reset_name);
1013 vip_gpio_release(&pdev->dev, config->pwr_pin,
1018 if (gpio_is_valid(config->pwr_pin)) {
1019 /* Datasheet says 5ms between PWR and RST */
1020 usleep_range(5000, 25000);
1021 gpio_direction_output(config->pwr_pin, 1);
1024 if (gpio_is_valid(config->reset_pin)) {
1025 /* Datasheet says 5ms between PWR and RST */
1026 usleep_range(5000, 25000);
1027 gpio_direction_output(config->reset_pin, 1);
1029 usleep_range(5000, 25000);
1031 /* Allocate a new VIP instance */
1032 vip = kzalloc(sizeof(struct sta2x11_vip), GFP_KERNEL);
1038 vip->std = V4L2_STD_PAL;
1039 vip->format = formats_50[0];
1040 vip->config = config;
1041 mutex_init(&vip->v4l_lock);
1043 ret = sta2x11_vip_init_controls(vip);
1046 ret = v4l2_device_register(&pdev->dev, &vip->v4l2_dev);
1050 dev_dbg(&pdev->dev, "BAR #0 at 0x%lx 0x%lx irq %d\n",
1051 (unsigned long)pci_resource_start(pdev, 0),
1052 (unsigned long)pci_resource_len(pdev, 0), pdev->irq);
1054 pci_set_master(pdev);
1056 ret = pci_request_regions(pdev, KBUILD_MODNAME);
1060 vip->iomem = pci_iomap(pdev, 0, 0x100);
1066 pci_enable_msi(pdev);
1068 /* Initialize buffer */
1069 ret = sta2x11_vip_init_buffer(vip);
1073 spin_lock_init(&vip->slock);
1075 ret = request_irq(pdev->irq,
1076 (irq_handler_t) vip_irq,
1077 IRQF_SHARED, KBUILD_MODNAME, vip);
1079 dev_err(&pdev->dev, "request_irq failed\n");
1084 /* Initialize and register video device */
1085 vip->video_dev = video_dev_template;
1086 vip->video_dev.v4l2_dev = &vip->v4l2_dev;
1087 vip->video_dev.queue = &vip->vb_vidq;
1088 vip->video_dev.lock = &vip->v4l_lock;
1089 video_set_drvdata(&vip->video_dev, vip);
1091 ret = video_register_device(&vip->video_dev, VFL_TYPE_GRABBER, -1);
1095 /* Get ADV7180 subdevice */
1096 vip->adapter = i2c_get_adapter(vip->config->i2c_id);
1097 if (!vip->adapter) {
1099 dev_err(&pdev->dev, "no I2C adapter found\n");
1103 vip->decoder = v4l2_i2c_new_subdev(&vip->v4l2_dev, vip->adapter,
1104 "adv7180", vip->config->i2c_addr,
1106 if (!vip->decoder) {
1108 dev_err(&pdev->dev, "no decoder found\n");
1112 i2c_put_adapter(vip->adapter);
1113 v4l2_subdev_call(vip->decoder, core, init, 0);
1115 sta2x11_vip_init_register(vip);
1117 dev_info(&pdev->dev, "STA2X11 Video Input Port (VIP) loaded\n");
1121 video_set_drvdata(&vip->video_dev, NULL);
1123 video_unregister_device(&vip->video_dev);
1124 free_irq(pdev->irq, vip);
1126 pci_disable_msi(pdev);
1128 vb2_queue_release(&vip->vb_vidq);
1129 pci_iounmap(pdev, vip->iomem);
1131 pci_release_regions(pdev);
1133 v4l2_device_unregister(&vip->v4l2_dev);
1137 vip_gpio_release(&pdev->dev, config->reset_pin, config->reset_name);
1138 vip_gpio_release(&pdev->dev, config->pwr_pin, config->pwr_name);
1141 * do not call pci_disable_device on sta2x11 because it break all
1142 * other Bus masters on this EP
1148 * sta2x11_vip_remove_one - release device
1151 * Undo everything done in .._init_one
1153 * unregister video device
1159 static void sta2x11_vip_remove_one(struct pci_dev *pdev)
1161 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1162 struct sta2x11_vip *vip =
1163 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1165 sta2x11_vip_clear_register(vip);
1167 video_set_drvdata(&vip->video_dev, NULL);
1168 video_unregister_device(&vip->video_dev);
1169 free_irq(pdev->irq, vip);
1170 pci_disable_msi(pdev);
1171 vb2_queue_release(&vip->vb_vidq);
1172 pci_iounmap(pdev, vip->iomem);
1173 pci_release_regions(pdev);
1175 v4l2_device_unregister(&vip->v4l2_dev);
1177 vip_gpio_release(&pdev->dev, vip->config->pwr_pin,
1178 vip->config->pwr_name);
1179 vip_gpio_release(&pdev->dev, vip->config->reset_pin,
1180 vip->config->reset_name);
1184 * do not call pci_disable_device on sta2x11 because it break all
1185 * other Bus masters on this EP
1192 * sta2x11_vip_suspend - set device into power save mode
1194 * @state: new state of device
1196 * all relevant registers are saved and an attempt to set a new state is made.
1198 * return value: 0 always indicate success,
1199 * even if device could not be disabled. (workaround for hardware problem)
1201 static int sta2x11_vip_suspend(struct pci_dev *pdev, pm_message_t state)
1203 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1204 struct sta2x11_vip *vip =
1205 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1206 unsigned long flags;
1209 spin_lock_irqsave(&vip->slock, flags);
1210 vip->register_save_area[0] = reg_read(vip, DVP_CTL);
1211 reg_write(vip, DVP_CTL, vip->register_save_area[0] & DVP_CTL_DIS);
1212 vip->register_save_area[SAVE_COUNT] = reg_read(vip, DVP_ITM);
1213 reg_write(vip, DVP_ITM, 0);
1214 for (i = 1; i < SAVE_COUNT; i++)
1215 vip->register_save_area[i] = reg_read(vip, 4 * i);
1216 for (i = 0; i < AUX_COUNT; i++)
1217 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i] =
1218 reg_read(vip, registers_to_save[i]);
1219 spin_unlock_irqrestore(&vip->slock, flags);
1220 /* save pci state */
1221 pci_save_state(pdev);
1222 if (pci_set_power_state(pdev, pci_choose_state(pdev, state))) {
1224 * do not call pci_disable_device on sta2x11 because it
1225 * break all other Bus masters on this EP
1230 pr_info("VIP: suspend\n");
1235 * sta2x11_vip_resume - resume device operation
1236 * @pdev : PCI device
1238 * re-enable device, set PCI state to powered and restore registers.
1239 * resume normal device operation afterwards.
1241 * return value: 0, no error.
1243 * other, could not set device to power on state.
1245 static int sta2x11_vip_resume(struct pci_dev *pdev)
1247 struct v4l2_device *v4l2_dev = pci_get_drvdata(pdev);
1248 struct sta2x11_vip *vip =
1249 container_of(v4l2_dev, struct sta2x11_vip, v4l2_dev);
1250 unsigned long flags;
1253 pr_info("VIP: resume\n");
1254 /* restore pci state */
1255 if (vip->disabled) {
1256 ret = pci_enable_device(pdev);
1258 pr_warn("VIP: Can't enable device.\n");
1263 ret = pci_set_power_state(pdev, PCI_D0);
1266 * do not call pci_disable_device on sta2x11 because it
1267 * break all other Bus masters on this EP
1269 pr_warn("VIP: Can't enable device.\n");
1274 pci_restore_state(pdev);
1276 spin_lock_irqsave(&vip->slock, flags);
1277 for (i = 1; i < SAVE_COUNT; i++)
1278 reg_write(vip, 4 * i, vip->register_save_area[i]);
1279 for (i = 0; i < AUX_COUNT; i++)
1280 reg_write(vip, registers_to_save[i],
1281 vip->register_save_area[SAVE_COUNT + IRQ_COUNT + i]);
1282 reg_write(vip, DVP_CTL, vip->register_save_area[0]);
1283 reg_write(vip, DVP_ITM, vip->register_save_area[SAVE_COUNT]);
1284 spin_unlock_irqrestore(&vip->slock, flags);
1290 static const struct pci_device_id sta2x11_vip_pci_tbl[] = {
1291 {PCI_DEVICE(PCI_VENDOR_ID_STMICRO, PCI_DEVICE_ID_STMICRO_VIP)},
1295 static struct pci_driver sta2x11_vip_driver = {
1296 .name = KBUILD_MODNAME,
1297 .probe = sta2x11_vip_init_one,
1298 .remove = sta2x11_vip_remove_one,
1299 .id_table = sta2x11_vip_pci_tbl,
1301 .suspend = sta2x11_vip_suspend,
1302 .resume = sta2x11_vip_resume,
1306 static int __init sta2x11_vip_init_module(void)
1308 return pci_register_driver(&sta2x11_vip_driver);
1311 static void __exit sta2x11_vip_exit_module(void)
1313 pci_unregister_driver(&sta2x11_vip_driver);
1317 module_init(sta2x11_vip_init_module);
1318 module_exit(sta2x11_vip_exit_module);
1320 late_initcall_sync(sta2x11_vip_init_module);
1323 MODULE_DESCRIPTION("STA2X11 Video Input Port driver");
1324 MODULE_AUTHOR("Wind River");
1325 MODULE_LICENSE("GPL v2");
1326 MODULE_SUPPORTED_DEVICE("sta2x11 video input");
1327 MODULE_VERSION(DRV_VERSION);
1328 MODULE_DEVICE_TABLE(pci, sta2x11_vip_pci_tbl);