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path: root/drivers/media/pci/tw686x/tw686x-video.c
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Diffstat (limited to 'drivers/media/pci/tw686x/tw686x-video.c')
-rw-r--r--drivers/media/pci/tw686x/tw686x-video.c937
1 files changed, 937 insertions, 0 deletions
diff --git a/drivers/media/pci/tw686x/tw686x-video.c b/drivers/media/pci/tw686x/tw686x-video.c
new file mode 100644
index 000000000000..253e10823ba3
--- /dev/null
+++ b/drivers/media/pci/tw686x/tw686x-video.c
@@ -0,0 +1,937 @@
+/*
+ * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
+ *
+ * Based on original driver by Krzysztof Ha?asa:
+ * Copyright (C) 2015 Industrial Research Institute for Automation
+ * and Measurements PIAP
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License
+ * as published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <media/v4l2-common.h>
+#include <media/v4l2-event.h>
+#include <media/videobuf2-vmalloc.h>
+#include "tw686x.h"
+#include "tw686x-regs.h"
+
+#define TW686X_INPUTS_PER_CH 4
+#define TW686X_VIDEO_WIDTH 720
+#define TW686X_VIDEO_HEIGHT(id) ((id & V4L2_STD_525_60) ? 480 : 576)
+
+static const struct tw686x_format formats[] = {
+ {
+ .fourcc = V4L2_PIX_FMT_UYVY,
+ .mode = 0,
+ .depth = 16,
+ }, {
+ .fourcc = V4L2_PIX_FMT_RGB565,
+ .mode = 5,
+ .depth = 16,
+ }, {
+ .fourcc = V4L2_PIX_FMT_YUYV,
+ .mode = 6,
+ .depth = 16,
+ }
+};
+
+static unsigned int tw686x_fields_map(v4l2_std_id std, unsigned int fps)
+{
+ static const unsigned int map[15] = {
+ 0x00000000, 0x00000001, 0x00004001, 0x00104001, 0x00404041,
+ 0x01041041, 0x01104411, 0x01111111, 0x04444445, 0x04511445,
+ 0x05145145, 0x05151515, 0x05515455, 0x05551555, 0x05555555
+ };
+
+ static const unsigned int std_625_50[26] = {
+ 0, 1, 1, 2, 3, 3, 4, 4, 5, 5, 6, 7, 7,
+ 8, 8, 9, 10, 10, 11, 11, 12, 13, 13, 14, 14, 0
+ };
+
+ static const unsigned int std_525_60[31] = {
+ 0, 1, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7,
+ 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13, 14, 0, 0
+ };
+
+ unsigned int i;
+
+ if (std & V4L2_STD_525_60) {
+ if (fps >= ARRAY_SIZE(std_525_60))
+ fps = 30;
+ i = std_525_60[fps];
+ } else {
+ if (fps >= ARRAY_SIZE(std_625_50))
+ fps = 25;
+ i = std_625_50[fps];
+ }
+
+ return map[i];
+}
+
+static void tw686x_set_framerate(struct tw686x_video_channel *vc,
+ unsigned int fps)
+{
+ unsigned int map;
+
+ if (vc->fps == fps)
+ return;
+
+ map = tw686x_fields_map(vc->video_standard, fps) << 1;
+ map |= map << 1;
+ if (map > 0)
+ map |= BIT(31);
+ reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], map);
+ vc->fps = fps;
+}
+
+static const struct tw686x_format *format_by_fourcc(unsigned int fourcc)
+{
+ unsigned int cnt;
+
+ for (cnt = 0; cnt < ARRAY_SIZE(formats); cnt++)
+ if (formats[cnt].fourcc == fourcc)
+ return &formats[cnt];
+ return NULL;
+}
+
+static int tw686x_queue_setup(struct vb2_queue *vq,
+ unsigned int *nbuffers, unsigned int *nplanes,
+ unsigned int sizes[], void *alloc_ctxs[])
+{
+ struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
+ unsigned int szimage =
+ (vc->width * vc->height * vc->format->depth) >> 3;
+
+ /*
+ * Let's request at least three buffers: two for the
+ * DMA engine and one for userspace.
+ */
+ if (vq->num_buffers + *nbuffers < 3)
+ *nbuffers = 3 - vq->num_buffers;
+
+ if (*nplanes) {
+ if (*nplanes != 1 || sizes[0] < szimage)
+ return -EINVAL;
+ return 0;
+ }
+
+ sizes[0] = szimage;
+ *nplanes = 1;
+ return 0;
+}
+
+static void tw686x_buf_queue(struct vb2_buffer *vb)
+{
+ struct tw686x_video_channel *vc = vb2_get_drv_priv(vb->vb2_queue);
+ struct tw686x_dev *dev = vc->dev;
+ struct pci_dev *pci_dev;
+ unsigned long flags;
+ struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
+ struct tw686x_v4l2_buf *buf =
+ container_of(vbuf, struct tw686x_v4l2_buf, vb);
+
+ /* Check device presence */
+ spin_lock_irqsave(&dev->lock, flags);
+ pci_dev = dev->pci_dev;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (!pci_dev) {
+ vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
+ return;
+ }
+
+ spin_lock_irqsave(&vc->qlock, flags);
+ list_add_tail(&buf->list, &vc->vidq_queued);
+ spin_unlock_irqrestore(&vc->qlock, flags);
+}
+
+/*
+ * We can call this even when alloc_dma failed for the given channel
+ */
+static void tw686x_free_dma(struct tw686x_video_channel *vc, unsigned int pb)
+{
+ struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
+ struct tw686x_dev *dev = vc->dev;
+ struct pci_dev *pci_dev;
+ unsigned long flags;
+
+ /* Check device presence. Shouldn't really happen! */
+ spin_lock_irqsave(&dev->lock, flags);
+ pci_dev = dev->pci_dev;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (!pci_dev) {
+ WARN(1, "trying to deallocate on missing device\n");
+ return;
+ }
+
+ if (desc->virt) {
+ pci_free_consistent(dev->pci_dev, desc->size,
+ desc->virt, desc->phys);
+ desc->virt = NULL;
+ }
+}
+
+static int tw686x_alloc_dma(struct tw686x_video_channel *vc, unsigned int pb)
+{
+ struct tw686x_dev *dev = vc->dev;
+ u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch];
+ unsigned int len;
+ void *virt;
+
+ WARN(vc->dma_descs[pb].virt,
+ "Allocating buffer but previous still here\n");
+
+ len = (vc->width * vc->height * vc->format->depth) >> 3;
+ virt = pci_alloc_consistent(dev->pci_dev, len,
+ &vc->dma_descs[pb].phys);
+ if (!virt) {
+ v4l2_err(&dev->v4l2_dev,
+ "dma%d: unable to allocate %s-buffer\n",
+ vc->ch, pb ? "B" : "P");
+ return -ENOMEM;
+ }
+ vc->dma_descs[pb].size = len;
+ vc->dma_descs[pb].virt = virt;
+ reg_write(dev, reg, vc->dma_descs[pb].phys);
+
+ return 0;
+}
+
+static void tw686x_buffer_refill(struct tw686x_video_channel *vc,
+ unsigned int pb)
+{
+ struct tw686x_v4l2_buf *buf;
+
+ while (!list_empty(&vc->vidq_queued)) {
+
+ buf = list_first_entry(&vc->vidq_queued,
+ struct tw686x_v4l2_buf, list);
+ list_del(&buf->list);
+
+ vc->curr_bufs[pb] = buf;
+ return;
+ }
+ vc->curr_bufs[pb] = NULL;
+}
+
+static void tw686x_clear_queue(struct tw686x_video_channel *vc,
+ enum vb2_buffer_state state)
+{
+ unsigned int pb;
+
+ while (!list_empty(&vc->vidq_queued)) {
+ struct tw686x_v4l2_buf *buf;
+
+ buf = list_first_entry(&vc->vidq_queued,
+ struct tw686x_v4l2_buf, list);
+ list_del(&buf->list);
+ vb2_buffer_done(&buf->vb.vb2_buf, state);
+ }
+
+ for (pb = 0; pb < 2; pb++) {
+ if (vc->curr_bufs[pb])
+ vb2_buffer_done(&vc->curr_bufs[pb]->vb.vb2_buf, state);
+ vc->curr_bufs[pb] = NULL;
+ }
+}
+
+static int tw686x_start_streaming(struct vb2_queue *vq, unsigned int count)
+{
+ struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
+ struct tw686x_dev *dev = vc->dev;
+ struct pci_dev *pci_dev;
+ unsigned long flags;
+ int pb, err;
+
+ /* Check device presence */
+ spin_lock_irqsave(&dev->lock, flags);
+ pci_dev = dev->pci_dev;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (!pci_dev) {
+ err = -ENODEV;
+ goto err_clear_queue;
+ }
+
+ spin_lock_irqsave(&vc->qlock, flags);
+
+ /* Sanity check */
+ if (!vc->dma_descs[0].virt || !vc->dma_descs[1].virt) {
+ spin_unlock_irqrestore(&vc->qlock, flags);
+ v4l2_err(&dev->v4l2_dev,
+ "video%d: refusing to start without DMA buffers\n",
+ vc->num);
+ err = -ENOMEM;
+ goto err_clear_queue;
+ }
+
+ for (pb = 0; pb < 2; pb++)
+ tw686x_buffer_refill(vc, pb);
+ spin_unlock_irqrestore(&vc->qlock, flags);
+
+ vc->sequence = 0;
+ vc->pb = 0;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ tw686x_enable_channel(dev, vc->ch);
+ spin_unlock_irqrestore(&dev->lock, flags);
+
+ mod_timer(&dev->dma_delay_timer, jiffies + msecs_to_jiffies(100));
+
+ return 0;
+
+err_clear_queue:
+ spin_lock_irqsave(&vc->qlock, flags);
+ tw686x_clear_queue(vc, VB2_BUF_STATE_QUEUED);
+ spin_unlock_irqrestore(&vc->qlock, flags);
+ return err;
+}
+
+static void tw686x_stop_streaming(struct vb2_queue *vq)
+{
+ struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
+ struct tw686x_dev *dev = vc->dev;
+ struct pci_dev *pci_dev;
+ unsigned long flags;
+
+ /* Check device presence */
+ spin_lock_irqsave(&dev->lock, flags);
+ pci_dev = dev->pci_dev;
+ spin_unlock_irqrestore(&dev->lock, flags);
+ if (pci_dev)
+ tw686x_disable_channel(dev, vc->ch);
+
+ spin_lock_irqsave(&vc->qlock, flags);
+ tw686x_clear_queue(vc, VB2_BUF_STATE_ERROR);
+ spin_unlock_irqrestore(&vc->qlock, flags);
+}
+
+static int tw686x_buf_prepare(struct vb2_buffer *vb)
+{
+ struct tw686x_video_channel *vc = vb2_get_drv_priv(vb->vb2_queue);
+ unsigned int size =
+ (vc->width * vc->height * vc->format->depth) >> 3;
+
+ if (vb2_plane_size(vb, 0) < size)
+ return -EINVAL;
+ vb2_set_plane_payload(vb, 0, size);
+ return 0;
+}
+
+static struct vb2_ops tw686x_video_qops = {
+ .queue_setup = tw686x_queue_setup,
+ .buf_queue = tw686x_buf_queue,
+ .buf_prepare = tw686x_buf_prepare,
+ .start_streaming = tw686x_start_streaming,
+ .stop_streaming = tw686x_stop_streaming,
+ .wait_prepare = vb2_ops_wait_prepare,
+ .wait_finish = vb2_ops_wait_finish,
+};
+
+static int tw686x_s_ctrl(struct v4l2_ctrl *ctrl)
+{
+ struct tw686x_video_channel *vc;
+ struct tw686x_dev *dev;
+ unsigned int ch;
+
+ vc = container_of(ctrl->handler, struct tw686x_video_channel,
+ ctrl_handler);
+ dev = vc->dev;
+ ch = vc->ch;
+
+ switch (ctrl->id) {
+ case V4L2_CID_BRIGHTNESS:
+ reg_write(dev, BRIGHT[ch], ctrl->val & 0xff);
+ return 0;
+
+ case V4L2_CID_CONTRAST:
+ reg_write(dev, CONTRAST[ch], ctrl->val);
+ return 0;
+
+ case V4L2_CID_SATURATION:
+ reg_write(dev, SAT_U[ch], ctrl->val);
+ reg_write(dev, SAT_V[ch], ctrl->val);
+ return 0;
+
+ case V4L2_CID_HUE:
+ reg_write(dev, HUE[ch], ctrl->val & 0xff);
+ return 0;
+ }
+
+ return -EINVAL;
+}
+
+static const struct v4l2_ctrl_ops ctrl_ops = {
+ .s_ctrl = tw686x_s_ctrl,
+};
+
+static int tw686x_g_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+
+ f->fmt.pix.width = vc->width;
+ f->fmt.pix.height = vc->height;
+ f->fmt.pix.field = V4L2_FIELD_INTERLACED;
+ f->fmt.pix.pixelformat = vc->format->fourcc;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+ f->fmt.pix.bytesperline = (f->fmt.pix.width * vc->format->depth) / 8;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+ return 0;
+}
+
+static int tw686x_try_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ unsigned int video_height = TW686X_VIDEO_HEIGHT(vc->video_standard);
+ const struct tw686x_format *format;
+
+ format = format_by_fourcc(f->fmt.pix.pixelformat);
+ if (!format) {
+ format = &formats[0];
+ f->fmt.pix.pixelformat = format->fourcc;
+ }
+
+ if (f->fmt.pix.width <= TW686X_VIDEO_WIDTH / 2)
+ f->fmt.pix.width = TW686X_VIDEO_WIDTH / 2;
+ else
+ f->fmt.pix.width = TW686X_VIDEO_WIDTH;
+
+ if (f->fmt.pix.height <= video_height / 2)
+ f->fmt.pix.height = video_height / 2;
+ else
+ f->fmt.pix.height = video_height;
+
+ f->fmt.pix.bytesperline = (f->fmt.pix.width * format->depth) / 8;
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+ f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
+ f->fmt.pix.field = V4L2_FIELD_INTERLACED;
+
+ return 0;
+}
+
+static int tw686x_s_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_format *f)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ u32 val, width, line_width, height;
+ unsigned long bitsperframe;
+ int err, pb;
+
+ if (vb2_is_busy(&vc->vidq))
+ return -EBUSY;
+
+ bitsperframe = vc->width * vc->height * vc->format->depth;
+ err = tw686x_try_fmt_vid_cap(file, priv, f);
+ if (err)
+ return err;
+
+ vc->format = format_by_fourcc(f->fmt.pix.pixelformat);
+ vc->width = f->fmt.pix.width;
+ vc->height = f->fmt.pix.height;
+
+ /* We need new DMA buffers if the framesize has changed */
+ if (bitsperframe != vc->width * vc->height * vc->format->depth) {
+ for (pb = 0; pb < 2; pb++)
+ tw686x_free_dma(vc, pb);
+
+ for (pb = 0; pb < 2; pb++) {
+ err = tw686x_alloc_dma(vc, pb);
+ if (err) {
+ if (pb > 0)
+ tw686x_free_dma(vc, 0);
+ return err;
+ }
+ }
+ }
+
+ val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
+
+ if (vc->width <= TW686X_VIDEO_WIDTH / 2)
+ val |= BIT(23);
+ else
+ val &= ~BIT(23);
+
+ if (vc->height <= TW686X_VIDEO_HEIGHT(vc->video_standard) / 2)
+ val |= BIT(24);
+ else
+ val &= ~BIT(24);
+
+ val &= ~(0x7 << 20);
+ val |= vc->format->mode << 20;
+ reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
+
+ /* Program the DMA frame size */
+ width = (vc->width * 2) & 0x7ff;
+ height = vc->height / 2;
+ line_width = (vc->width * 2) & 0x7ff;
+ val = (height << 22) | (line_width << 11) | width;
+ reg_write(vc->dev, VDMA_WHP[vc->ch], val);
+ return 0;
+}
+
+static int tw686x_querycap(struct file *file, void *priv,
+ struct v4l2_capability *cap)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ struct tw686x_dev *dev = vc->dev;
+
+ strlcpy(cap->driver, "tw686x", sizeof(cap->driver));
+ strlcpy(cap->card, dev->name, sizeof(cap->card));
+ snprintf(cap->bus_info, sizeof(cap->bus_info),
+ "PCI:%s", pci_name(dev->pci_dev));
+ cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING |
+ V4L2_CAP_READWRITE;
+ cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
+ return 0;
+}
+
+static int tw686x_s_std(struct file *file, void *priv, v4l2_std_id id)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ struct v4l2_format f;
+ u32 val, ret;
+
+ if (vc->video_standard == id)
+ return 0;
+
+ if (vb2_is_busy(&vc->vidq))
+ return -EBUSY;
+
+ if (id & V4L2_STD_NTSC)
+ val = 0;
+ else if (id & V4L2_STD_PAL)
+ val = 1;
+ else if (id & V4L2_STD_SECAM)
+ val = 2;
+ else if (id & V4L2_STD_NTSC_443)
+ val = 3;
+ else if (id & V4L2_STD_PAL_M)
+ val = 4;
+ else if (id & V4L2_STD_PAL_Nc)
+ val = 5;
+ else if (id & V4L2_STD_PAL_60)
+ val = 6;
+ else
+ return -EINVAL;
+
+ vc->video_standard = id;
+ reg_write(vc->dev, SDT[vc->ch], val);
+
+ val = reg_read(vc->dev, VIDEO_CONTROL1);
+ if (id & V4L2_STD_525_60)
+ val &= ~(1 << (SYS_MODE_DMA_SHIFT + vc->ch));
+ else
+ val |= (1 << (SYS_MODE_DMA_SHIFT + vc->ch));
+ reg_write(vc->dev, VIDEO_CONTROL1, val);
+
+ /*
+ * Adjust format after V4L2_STD_525_60/V4L2_STD_625_50 change,
+ * calling g_fmt and s_fmt will sanitize the height
+ * according to the standard.
+ */
+ ret = tw686x_g_fmt_vid_cap(file, priv, &f);
+ if (!ret)
+ tw686x_s_fmt_vid_cap(file, priv, &f);
+ return 0;
+}
+
+static int tw686x_querystd(struct file *file, void *priv, v4l2_std_id *std)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ struct tw686x_dev *dev = vc->dev;
+ unsigned int old_std, detected_std = 0;
+ unsigned long end;
+
+ if (vb2_is_streaming(&vc->vidq))
+ return -EBUSY;
+
+ /* Enable and start standard detection */
+ old_std = reg_read(dev, SDT[vc->ch]);
+ reg_write(dev, SDT[vc->ch], 0x7);
+ reg_write(dev, SDT_EN[vc->ch], 0xff);
+
+ end = jiffies + msecs_to_jiffies(500);
+ while (time_is_after_jiffies(end)) {
+
+ detected_std = reg_read(dev, SDT[vc->ch]);
+ if (!(detected_std & BIT(7)))
+ break;
+ msleep(100);
+ }
+ reg_write(dev, SDT[vc->ch], old_std);
+
+ /* Exit if still busy */
+ if (detected_std & BIT(7))
+ return 0;
+
+ detected_std = (detected_std >> 4) & 0x7;
+ switch (detected_std) {
+ case TW686X_STD_NTSC_M:
+ *std &= V4L2_STD_NTSC;
+ break;
+ case TW686X_STD_NTSC_443:
+ *std &= V4L2_STD_NTSC_443;
+ break;
+ case TW686X_STD_PAL_M:
+ *std &= V4L2_STD_PAL_M;
+ break;
+ case TW686X_STD_PAL_60:
+ *std &= V4L2_STD_PAL_60;
+ break;
+ case TW686X_STD_PAL:
+ *std &= V4L2_STD_PAL;
+ break;
+ case TW686X_STD_PAL_CN:
+ *std &= V4L2_STD_PAL_Nc;
+ break;
+ case TW686X_STD_SECAM:
+ *std &= V4L2_STD_SECAM;
+ break;
+ default:
+ *std = 0;
+ }
+ return 0;
+}
+
+static int tw686x_g_std(struct file *file, void *priv, v4l2_std_id *id)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+
+ *id = vc->video_standard;
+ return 0;
+}
+
+static int tw686x_enum_fmt_vid_cap(struct file *file, void *priv,
+ struct v4l2_fmtdesc *f)
+{
+ if (f->index >= ARRAY_SIZE(formats))
+ return -EINVAL;
+ f->pixelformat = formats[f->index].fourcc;
+ return 0;
+}
+
+static int tw686x_s_input(struct file *file, void *priv, unsigned int i)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ u32 val;
+
+ if (i >= TW686X_INPUTS_PER_CH)
+ return -EINVAL;
+ if (i == vc->input)
+ return 0;
+ /*
+ * Not sure we are able to support on the fly input change
+ */
+ if (vb2_is_busy(&vc->vidq))
+ return -EBUSY;
+
+ vc->input = i;
+
+ val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
+ val &= ~(0x3 << 30);
+ val |= i << 30;
+ reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
+ return 0;
+}
+
+static int tw686x_g_input(struct file *file, void *priv, unsigned int *i)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+
+ *i = vc->input;
+ return 0;
+}
+
+static int tw686x_enum_input(struct file *file, void *priv,
+ struct v4l2_input *i)
+{
+ struct tw686x_video_channel *vc = video_drvdata(file);
+ unsigned int vidstat;
+
+ if (i->index >= TW686X_INPUTS_PER_CH)
+ return -EINVAL;
+
+ snprintf(i->name, sizeof(i->name), "Composite%d", i->index);
+ i->type = V4L2_INPUT_TYPE_CAMERA;
+ i->std = vc->device->tvnorms;
+ i->capabilities = V4L2_IN_CAP_STD;
+
+ vidstat = reg_read(vc->dev, VIDSTAT[vc->ch]);
+ i->status = 0;
+ if (vidstat & TW686X_VIDSTAT_VDLOSS)
+ i->status |= V4L2_IN_ST_NO_SIGNAL;
+ if (!(vidstat & TW686X_VIDSTAT_HLOCK))
+ i->status |= V4L2_IN_ST_NO_H_LOCK;
+
+ return 0;
+}
+
+static const struct v4l2_file_operations tw686x_video_fops = {
+ .owner = THIS_MODULE,
+ .open = v4l2_fh_open,
+ .unlocked_ioctl = video_ioctl2,
+ .release = vb2_fop_release,
+ .poll = vb2_fop_poll,
+ .read = vb2_fop_read,
+ .mmap = vb2_fop_mmap,
+};
+
+static const struct v4l2_ioctl_ops tw686x_video_ioctl_ops = {
+ .vidioc_querycap = tw686x_querycap,
+ .vidioc_g_fmt_vid_cap = tw686x_g_fmt_vid_cap,
+ .vidioc_s_fmt_vid_cap = tw686x_s_fmt_vid_cap,
+ .vidioc_enum_fmt_vid_cap = tw686x_enum_fmt_vid_cap,
+ .vidioc_try_fmt_vid_cap = tw686x_try_fmt_vid_cap,
+
+ .vidioc_querystd = tw686x_querystd,
+ .vidioc_g_std = tw686x_g_std,
+ .vidioc_s_std = tw686x_s_std,
+
+ .vidioc_enum_input = tw686x_enum_input,
+ .vidioc_g_input = tw686x_g_input,
+ .vidioc_s_input = tw686x_s_input,
+
+ .vidioc_reqbufs = vb2_ioctl_reqbufs,
+ .vidioc_querybuf = vb2_ioctl_querybuf,
+ .vidioc_qbuf = vb2_ioctl_qbuf,
+ .vidioc_dqbuf = vb2_ioctl_dqbuf,
+ .vidioc_create_bufs = vb2_ioctl_create_bufs,
+ .vidioc_streamon = vb2_ioctl_streamon,
+ .vidioc_streamoff = vb2_ioctl_streamoff,
+ .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
+
+ .vidioc_log_status = v4l2_ctrl_log_status,
+ .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
+ .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
+};
+
+static void tw686x_buffer_copy(struct tw686x_video_channel *vc,
+ unsigned int pb, struct vb2_v4l2_buffer *vb)
+{
+ struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
+ struct vb2_buffer *vb2_buf = &vb->vb2_buf;
+
+ vb->field = V4L2_FIELD_INTERLACED;
+ vb->sequence = vc->sequence++;
+
+ memcpy(vb2_plane_vaddr(vb2_buf, 0), desc->virt, desc->size);
+ vb2_buf->timestamp = ktime_get_ns();
+ vb2_buffer_done(vb2_buf, VB2_BUF_STATE_DONE);
+}
+
+void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
+ unsigned int pb_status, unsigned int fifo_status,
+ unsigned int *reset_ch)
+{
+ struct tw686x_video_channel *vc;
+ struct vb2_v4l2_buffer *vb;
+ unsigned long flags;
+ unsigned int ch, pb;
+
+ for_each_set_bit(ch, &requests, max_channels(dev)) {
+ vc = &dev->video_channels[ch];
+
+ /*
+ * This can either be a blue frame (with signal-lost bit set)
+ * or a good frame (with signal-lost bit clear). If we have just
+ * got signal, then this channel needs resetting.
+ */
+ if (vc->no_signal && !(fifo_status & BIT(ch))) {
+ v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
+ "video%d: signal recovered\n", vc->num);
+ vc->no_signal = false;
+ *reset_ch |= BIT(ch);
+ vc->pb = 0;
+ continue;
+ }
+ vc->no_signal = !!(fifo_status & BIT(ch));
+
+ /* Check FIFO errors only if there's signal */
+ if (!vc->no_signal) {
+ u32 fifo_ov, fifo_bad;
+
+ fifo_ov = (fifo_status >> 24) & BIT(ch);
+ fifo_bad = (fifo_status >> 16) & BIT(ch);
+ if (fifo_ov || fifo_bad) {
+ /* Mark this channel for reset */
+ v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
+ "video%d: FIFO error\n", vc->num);
+ *reset_ch |= BIT(ch);
+ vc->pb = 0;
+ continue;
+ }
+ }
+
+ pb = !!(pb_status & BIT(ch));
+ if (vc->pb != pb) {
+ /* Mark this channel for reset */
+ v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
+ "video%d: unexpected p-b buffer!\n",
+ vc->num);
+ *reset_ch |= BIT(ch);
+ vc->pb = 0;
+ continue;
+ }
+
+ /* handle video stream */
+ spin_lock_irqsave(&vc->qlock, flags);
+ if (vc->curr_bufs[pb]) {
+ vb = &vc->curr_bufs[pb]->vb;
+ tw686x_buffer_copy(vc, pb, vb);
+ }
+ vc->pb = !pb;
+ tw686x_buffer_refill(vc, pb);
+ spin_unlock_irqrestore(&vc->qlock, flags);
+ }
+}
+
+void tw686x_video_free(struct tw686x_dev *dev)
+{
+ unsigned int ch, pb;
+
+ for (ch = 0; ch < max_channels(dev); ch++) {
+ struct tw686x_video_channel *vc = &dev->video_channels[ch];
+
+ if (vc->device)
+ video_unregister_device(vc->device);
+
+ for (pb = 0; pb < 2; pb++)
+ tw686x_free_dma(vc, pb);
+ }
+}
+
+int tw686x_video_init(struct tw686x_dev *dev)
+{
+ unsigned int ch, val, pb;
+ int err;
+
+ err = v4l2_device_register(&dev->pci_dev->dev, &dev->v4l2_dev);
+ if (err)
+ return err;
+
+ for (ch = 0; ch < max_channels(dev); ch++) {
+ struct tw686x_video_channel *vc = &dev->video_channels[ch];
+ struct video_device *vdev;
+
+ mutex_init(&vc->vb_mutex);
+ spin_lock_init(&vc->qlock);
+ INIT_LIST_HEAD(&vc->vidq_queued);
+
+ vc->dev = dev;
+ vc->ch = ch;
+
+ /* default settings */
+ vc->format = &formats[0];
+ vc->video_standard = V4L2_STD_NTSC;
+ vc->width = TW686X_VIDEO_WIDTH;
+ vc->height = TW686X_VIDEO_HEIGHT(vc->video_standard);
+ vc->input = 0;
+
+ reg_write(vc->dev, SDT[ch], 0);
+ tw686x_set_framerate(vc, 30);
+
+ reg_write(dev, VDELAY_LO[ch], 0x14);
+ reg_write(dev, HACTIVE_LO[ch], 0xd0);
+ reg_write(dev, VIDEO_SIZE[ch], 0);
+
+ for (pb = 0; pb < 2; pb++) {
+ err = tw686x_alloc_dma(vc, pb);
+ if (err)
+ goto error;
+ }
+
+ vc->vidq.io_modes = VB2_READ | VB2_MMAP | VB2_DMABUF;
+ vc->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
+ vc->vidq.drv_priv = vc;
+ vc->vidq.buf_struct_size = sizeof(struct tw686x_v4l2_buf);
+ vc->vidq.ops = &tw686x_video_qops;
+ vc->vidq.mem_ops = &vb2_vmalloc_memops;
+ vc->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
+ vc->vidq.min_buffers_needed = 2;
+ vc->vidq.lock = &vc->vb_mutex;
+ vc->vidq.gfp_flags = GFP_DMA32;
+
+ err = vb2_queue_init(&vc->vidq);
+ if (err) {
+ v4l2_err(&dev->v4l2_dev,
+ "dma%d: cannot init vb2 queue\n", ch);
+ goto error;
+ }
+
+ err = v4l2_ctrl_handler_init(&vc->ctrl_handler, 4);
+ if (err) {
+ v4l2_err(&dev->v4l2_dev,
+ "dma%d: cannot init ctrl handler\n", ch);
+ goto error;
+ }
+ v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
+ V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
+ v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
+ V4L2_CID_CONTRAST, 0, 255, 1, 100);
+ v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
+ V4L2_CID_SATURATION, 0, 255, 1, 128);
+ v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
+ V4L2_CID_HUE, -128, 127, 1, 0);
+ err = vc->ctrl_handler.error;
+ if (err)
+ goto error;
+
+ err = v4l2_ctrl_handler_setup(&vc->ctrl_handler);
+ if (err)
+ goto error;
+
+ vdev = video_device_alloc();
+ if (!vdev) {
+ v4l2_err(&dev->v4l2_dev,
+ "dma%d: unable to allocate device\n", ch);
+ err = -ENOMEM;
+ goto error;
+ }
+
+ snprintf(vdev->name, sizeof(vdev->name), "%s video", dev->name);
+ vdev->fops = &tw686x_video_fops;
+ vdev->ioctl_ops = &tw686x_video_ioctl_ops;
+ vdev->release = video_device_release;
+ vdev->v4l2_dev = &dev->v4l2_dev;
+ vdev->queue = &vc->vidq;
+ vdev->tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50;
+ vdev->minor = -1;
+ vdev->lock = &vc->vb_mutex;
+ vdev->ctrl_handler = &vc->ctrl_handler;
+ vc->device = vdev;
+ video_set_drvdata(vdev, vc);
+
+ err = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
+ if (err < 0)
+ goto error;
+ vc->num = vdev->num;
+ }
+
+ /* Set DMA frame mode on all channels. Only supported mode for now. */
+ val = TW686X_DEF_PHASE_REF;
+ for (ch = 0; ch < max_channels(dev); ch++)
+ val |= TW686X_FRAME_MODE << (16 + ch * 2);
+ reg_write(dev, PHASE_REF, val);
+
+ reg_write(dev, MISC2[0], 0xe7);
+ reg_write(dev, VCTRL1[0], 0xcc);
+ reg_write(dev, LOOP[0], 0xa5);
+ if (max_channels(dev) > 4) {
+ reg_write(dev, VCTRL1[1], 0xcc);
+ reg_write(dev, LOOP[1], 0xa5);
+ reg_write(dev, MISC2[1], 0xe7);
+ }
+ return 0;
+
+error:
+ tw686x_video_free(dev);
+ return err;
+}