| /* |
| * STK1160 driver |
| * |
| * Copyright (C) 2012 Ezequiel Garcia |
| * <elezegarcia--a.t--gmail.com> |
| * |
| * Based on Easycap driver by R.M. Thomas |
| * Copyright (C) 2010 R.M. Thomas |
| * <rmthomas--a.t--sciolus.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/usb.h> |
| #include <linux/mm.h> |
| #include <linux/slab.h> |
| |
| #include <linux/videodev2.h> |
| #include <media/v4l2-device.h> |
| #include <media/v4l2-common.h> |
| #include <media/v4l2-ioctl.h> |
| #include <media/v4l2-fh.h> |
| #include <media/v4l2-event.h> |
| #include <media/videobuf2-vmalloc.h> |
| |
| #include <media/saa7115.h> |
| |
| #include "stk1160.h" |
| #include "stk1160-reg.h" |
| |
| static bool keep_buffers; |
| module_param(keep_buffers, bool, 0644); |
| MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming"); |
| |
| enum stk1160_decimate_mode { |
| STK1160_DECIMATE_MORE_THAN_HALF, |
| STK1160_DECIMATE_LESS_THAN_HALF, |
| }; |
| |
| struct stk1160_decimate_ctrl { |
| bool col_en, row_en; |
| enum stk1160_decimate_mode col_mode, row_mode; |
| unsigned int col_n, row_n; |
| }; |
| |
| /* supported video standards */ |
| static struct stk1160_fmt format[] = { |
| { |
| .name = "16 bpp YUY2, 4:2:2, packed", |
| .fourcc = V4L2_PIX_FMT_UYVY, |
| .depth = 16, |
| } |
| }; |
| |
| /* |
| * Helper to find the next divisor that results in modulo being zero. |
| * This is required to guarantee valid decimation unit counts. |
| */ |
| static unsigned int |
| div_round_integer(unsigned int x, unsigned int y) |
| { |
| for (;; y++) { |
| if (x % y == 0) |
| return x / y; |
| } |
| } |
| |
| static void stk1160_set_std(struct stk1160 *dev) |
| { |
| int i; |
| |
| static struct regval std525[] = { |
| |
| /* 720x480 */ |
| |
| /* Frame start */ |
| {STK116_CFSPO_STX_L, 0x0000}, |
| {STK116_CFSPO_STX_H, 0x0000}, |
| {STK116_CFSPO_STY_L, 0x0003}, |
| {STK116_CFSPO_STY_H, 0x0000}, |
| |
| /* Frame end */ |
| {STK116_CFEPO_ENX_L, 0x05a0}, |
| {STK116_CFEPO_ENX_H, 0x0005}, |
| {STK116_CFEPO_ENY_L, 0x00f3}, |
| {STK116_CFEPO_ENY_H, 0x0000}, |
| |
| {0xffff, 0xffff} |
| }; |
| |
| static struct regval std625[] = { |
| |
| /* 720x576 */ |
| |
| /* TODO: Each line of frame has some junk at the end */ |
| /* Frame start */ |
| {STK116_CFSPO, 0x0000}, |
| {STK116_CFSPO+1, 0x0000}, |
| {STK116_CFSPO+2, 0x0001}, |
| {STK116_CFSPO+3, 0x0000}, |
| |
| /* Frame end */ |
| {STK116_CFEPO, 0x05a0}, |
| {STK116_CFEPO+1, 0x0005}, |
| {STK116_CFEPO+2, 0x0121}, |
| {STK116_CFEPO+3, 0x0001}, |
| |
| {0xffff, 0xffff} |
| }; |
| |
| if (dev->norm & V4L2_STD_525_60) { |
| stk1160_dbg("registers to NTSC like standard\n"); |
| for (i = 0; std525[i].reg != 0xffff; i++) |
| stk1160_write_reg(dev, std525[i].reg, std525[i].val); |
| } else { |
| stk1160_dbg("registers to PAL like standard\n"); |
| for (i = 0; std625[i].reg != 0xffff; i++) |
| stk1160_write_reg(dev, std625[i].reg, std625[i].val); |
| } |
| |
| } |
| |
| static void stk1160_set_fmt(struct stk1160 *dev, |
| struct stk1160_decimate_ctrl *ctrl) |
| { |
| u32 val = 0; |
| |
| if (ctrl) { |
| /* |
| * Since the format is UYVY, the device must skip or send |
| * a number of rows/columns multiple of four. This way, the |
| * colour format is preserved. The STK1160_DEC_UNIT_SIZE bit |
| * does exactly this. |
| */ |
| val |= STK1160_DEC_UNIT_SIZE; |
| val |= ctrl->col_en ? STK1160_H_DEC_EN : 0; |
| val |= ctrl->row_en ? STK1160_V_DEC_EN : 0; |
| val |= ctrl->col_mode == |
| STK1160_DECIMATE_MORE_THAN_HALF ? |
| STK1160_H_DEC_MODE : 0; |
| val |= ctrl->row_mode == |
| STK1160_DECIMATE_MORE_THAN_HALF ? |
| STK1160_V_DEC_MODE : 0; |
| |
| /* Horizontal count units */ |
| stk1160_write_reg(dev, STK1160_DMCTRL_H_UNITS, ctrl->col_n); |
| /* Vertical count units */ |
| stk1160_write_reg(dev, STK1160_DMCTRL_V_UNITS, ctrl->row_n); |
| |
| stk1160_dbg("decimate 0x%x, column units %d, row units %d\n", |
| val, ctrl->col_n, ctrl->row_n); |
| } |
| |
| /* Decimation control */ |
| stk1160_write_reg(dev, STK1160_DMCTRL, val); |
| } |
| |
| /* |
| * Set a new alternate setting. |
| * Returns true is dev->max_pkt_size has changed, false otherwise. |
| */ |
| static bool stk1160_set_alternate(struct stk1160 *dev) |
| { |
| int i, prev_alt = dev->alt; |
| unsigned int min_pkt_size; |
| bool new_pkt_size; |
| |
| /* |
| * If we don't set right alternate, |
| * then we will get a green screen with junk. |
| */ |
| min_pkt_size = STK1160_MIN_PKT_SIZE; |
| |
| for (i = 0; i < dev->num_alt; i++) { |
| /* stop when the selected alt setting offers enough bandwidth */ |
| if (dev->alt_max_pkt_size[i] >= min_pkt_size) { |
| dev->alt = i; |
| break; |
| /* |
| * otherwise make sure that we end up with the maximum bandwidth |
| * because the min_pkt_size equation might be wrong... |
| */ |
| } else if (dev->alt_max_pkt_size[i] > |
| dev->alt_max_pkt_size[dev->alt]) |
| dev->alt = i; |
| } |
| |
| stk1160_dbg("setting alternate %d\n", dev->alt); |
| |
| if (dev->alt != prev_alt) { |
| stk1160_dbg("minimum isoc packet size: %u (alt=%d)\n", |
| min_pkt_size, dev->alt); |
| stk1160_dbg("setting alt %d with wMaxPacketSize=%u\n", |
| dev->alt, dev->alt_max_pkt_size[dev->alt]); |
| usb_set_interface(dev->udev, 0, dev->alt); |
| } |
| |
| new_pkt_size = dev->max_pkt_size != dev->alt_max_pkt_size[dev->alt]; |
| dev->max_pkt_size = dev->alt_max_pkt_size[dev->alt]; |
| |
| return new_pkt_size; |
| } |
| |
| static int stk1160_start_streaming(struct stk1160 *dev) |
| { |
| bool new_pkt_size; |
| int rc = 0; |
| int i; |
| |
| /* Check device presence */ |
| if (!dev->udev) |
| return -ENODEV; |
| |
| if (mutex_lock_interruptible(&dev->v4l_lock)) |
| return -ERESTARTSYS; |
| /* |
| * For some reason it is mandatory to set alternate *first* |
| * and only *then* initialize isoc urbs. |
| * Someone please explain me why ;) |
| */ |
| new_pkt_size = stk1160_set_alternate(dev); |
| |
| /* |
| * We (re)allocate isoc urbs if: |
| * there is no allocated isoc urbs, OR |
| * a new dev->max_pkt_size is detected |
| */ |
| if (!dev->isoc_ctl.num_bufs || new_pkt_size) { |
| rc = stk1160_alloc_isoc(dev); |
| if (rc < 0) |
| goto out_stop_hw; |
| } |
| |
| /* submit urbs and enables IRQ */ |
| for (i = 0; i < dev->isoc_ctl.num_bufs; i++) { |
| rc = usb_submit_urb(dev->isoc_ctl.urb[i], GFP_KERNEL); |
| if (rc) { |
| stk1160_err("cannot submit urb[%d] (%d)\n", i, rc); |
| goto out_uninit; |
| } |
| } |
| |
| /* Start saa711x */ |
| v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1); |
| |
| dev->sequence = 0; |
| |
| /* Start stk1160 */ |
| stk1160_write_reg(dev, STK1160_DCTRL, 0xb3); |
| stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00); |
| |
| stk1160_dbg("streaming started\n"); |
| |
| mutex_unlock(&dev->v4l_lock); |
| |
| return 0; |
| |
| out_uninit: |
| stk1160_uninit_isoc(dev); |
| out_stop_hw: |
| usb_set_interface(dev->udev, 0, 0); |
| stk1160_clear_queue(dev); |
| |
| mutex_unlock(&dev->v4l_lock); |
| |
| return rc; |
| } |
| |
| /* Must be called with v4l_lock hold */ |
| static void stk1160_stop_hw(struct stk1160 *dev) |
| { |
| /* If the device is not physically present, there is nothing to do */ |
| if (!dev->udev) |
| return; |
| |
| /* set alternate 0 */ |
| dev->alt = 0; |
| stk1160_dbg("setting alternate %d\n", dev->alt); |
| usb_set_interface(dev->udev, 0, 0); |
| |
| /* Stop stk1160 */ |
| stk1160_write_reg(dev, STK1160_DCTRL, 0x00); |
| stk1160_write_reg(dev, STK1160_DCTRL+3, 0x00); |
| |
| /* Stop saa711x */ |
| v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 0); |
| } |
| |
| static int stk1160_stop_streaming(struct stk1160 *dev) |
| { |
| if (mutex_lock_interruptible(&dev->v4l_lock)) |
| return -ERESTARTSYS; |
| |
| /* |
| * Once URBs are cancelled, the URB complete handler |
| * won't be running. This is required to safely release the |
| * current buffer (dev->isoc_ctl.buf). |
| */ |
| stk1160_cancel_isoc(dev); |
| |
| /* |
| * It is possible to keep buffers around using a module parameter. |
| * This is intended to avoid memory fragmentation. |
| */ |
| if (!keep_buffers) |
| stk1160_free_isoc(dev); |
| |
| stk1160_stop_hw(dev); |
| |
| stk1160_clear_queue(dev); |
| |
| stk1160_dbg("streaming stopped\n"); |
| |
| mutex_unlock(&dev->v4l_lock); |
| |
| return 0; |
| } |
| |
| static struct v4l2_file_operations stk1160_fops = { |
| .owner = THIS_MODULE, |
| .open = v4l2_fh_open, |
| .release = vb2_fop_release, |
| .read = vb2_fop_read, |
| .poll = vb2_fop_poll, |
| .mmap = vb2_fop_mmap, |
| .unlocked_ioctl = video_ioctl2, |
| }; |
| |
| /* |
| * vidioc ioctls |
| */ |
| static int vidioc_querycap(struct file *file, |
| void *priv, struct v4l2_capability *cap) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| strcpy(cap->driver, "stk1160"); |
| strcpy(cap->card, "stk1160"); |
| usb_make_path(dev->udev, cap->bus_info, sizeof(cap->bus_info)); |
| 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 vidioc_enum_fmt_vid_cap(struct file *file, void *priv, |
| struct v4l2_fmtdesc *f) |
| { |
| if (f->index != 0) |
| return -EINVAL; |
| |
| strlcpy(f->description, format[f->index].name, sizeof(f->description)); |
| f->pixelformat = format[f->index].fourcc; |
| return 0; |
| } |
| |
| static int vidioc_g_fmt_vid_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| f->fmt.pix.width = dev->width; |
| f->fmt.pix.height = dev->height; |
| f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
| f->fmt.pix.pixelformat = dev->fmt->fourcc; |
| f->fmt.pix.bytesperline = dev->width * 2; |
| f->fmt.pix.sizeimage = dev->height * f->fmt.pix.bytesperline; |
| f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
| |
| return 0; |
| } |
| |
| static int stk1160_try_fmt(struct stk1160 *dev, struct v4l2_format *f, |
| struct stk1160_decimate_ctrl *ctrl) |
| { |
| unsigned int width, height; |
| unsigned int base_width, base_height; |
| unsigned int col_n, row_n; |
| enum stk1160_decimate_mode col_mode, row_mode; |
| bool col_en, row_en; |
| |
| base_width = 720; |
| base_height = (dev->norm & V4L2_STD_525_60) ? 480 : 576; |
| |
| /* Minimum width and height is 5% the frame size */ |
| width = clamp_t(unsigned int, f->fmt.pix.width, |
| base_width / 20, base_width); |
| height = clamp_t(unsigned int, f->fmt.pix.height, |
| base_height / 20, base_height); |
| |
| /* Let's set default no decimation values */ |
| col_n = 0; |
| row_n = 0; |
| col_en = false; |
| row_en = false; |
| f->fmt.pix.width = base_width; |
| f->fmt.pix.height = base_height; |
| row_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
| col_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
| |
| if (width < base_width && width > base_width / 2) { |
| /* |
| * The device will send count units for each |
| * unit skipped. This means count unit is: |
| * |
| * n = width / (frame width - width) |
| * |
| * And the width is: |
| * |
| * width = (n / n + 1) * frame width |
| */ |
| col_n = div_round_integer(width, base_width - width); |
| if (col_n > 0 && col_n <= 255) { |
| col_en = true; |
| col_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
| f->fmt.pix.width = (base_width * col_n) / (col_n + 1); |
| } |
| |
| } else if (width <= base_width / 2) { |
| |
| /* |
| * The device will skip count units for each |
| * unit sent. This means count is: |
| * |
| * n = (frame width / width) - 1 |
| * |
| * And the width is: |
| * |
| * width = frame width / (n + 1) |
| */ |
| col_n = div_round_integer(base_width, width) - 1; |
| if (col_n > 0 && col_n <= 255) { |
| col_en = true; |
| col_mode = STK1160_DECIMATE_MORE_THAN_HALF; |
| f->fmt.pix.width = base_width / (col_n + 1); |
| } |
| } |
| |
| if (height < base_height && height > base_height / 2) { |
| row_n = div_round_integer(height, base_height - height); |
| if (row_n > 0 && row_n <= 255) { |
| row_en = true; |
| row_mode = STK1160_DECIMATE_LESS_THAN_HALF; |
| f->fmt.pix.height = (base_height * row_n) / (row_n + 1); |
| } |
| |
| } else if (height <= base_height / 2) { |
| row_n = div_round_integer(base_height, height) - 1; |
| if (row_n > 0 && row_n <= 255) { |
| row_en = true; |
| row_mode = STK1160_DECIMATE_MORE_THAN_HALF; |
| f->fmt.pix.height = base_height / (row_n + 1); |
| } |
| } |
| |
| f->fmt.pix.pixelformat = dev->fmt->fourcc; |
| f->fmt.pix.field = V4L2_FIELD_INTERLACED; |
| f->fmt.pix.bytesperline = f->fmt.pix.width * 2; |
| f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline; |
| f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M; |
| |
| if (ctrl) { |
| ctrl->col_en = col_en; |
| ctrl->col_n = col_n; |
| ctrl->col_mode = col_mode; |
| ctrl->row_en = row_en; |
| ctrl->row_n = row_n; |
| ctrl->row_mode = row_mode; |
| } |
| |
| stk1160_dbg("width %d, height %d\n", |
| f->fmt.pix.width, f->fmt.pix.height); |
| return 0; |
| } |
| |
| static int vidioc_try_fmt_vid_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| return stk1160_try_fmt(dev, f, NULL); |
| } |
| |
| static int vidioc_s_fmt_vid_cap(struct file *file, void *priv, |
| struct v4l2_format *f) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| struct vb2_queue *q = &dev->vb_vidq; |
| struct stk1160_decimate_ctrl ctrl; |
| int rc; |
| |
| if (vb2_is_busy(q)) |
| return -EBUSY; |
| |
| rc = stk1160_try_fmt(dev, f, &ctrl); |
| if (rc < 0) |
| return rc; |
| dev->width = f->fmt.pix.width; |
| dev->height = f->fmt.pix.height; |
| stk1160_set_fmt(dev, &ctrl); |
| |
| return 0; |
| } |
| |
| static int vidioc_querystd(struct file *file, void *priv, v4l2_std_id *norm) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| v4l2_device_call_all(&dev->v4l2_dev, 0, video, querystd, norm); |
| return 0; |
| } |
| |
| static int vidioc_g_std(struct file *file, void *priv, v4l2_std_id *norm) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| *norm = dev->norm; |
| return 0; |
| } |
| |
| static int vidioc_s_std(struct file *file, void *priv, v4l2_std_id norm) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| struct vb2_queue *q = &dev->vb_vidq; |
| |
| if (dev->norm == norm) |
| return 0; |
| |
| if (vb2_is_busy(q)) |
| return -EBUSY; |
| |
| /* Check device presence */ |
| if (!dev->udev) |
| return -ENODEV; |
| |
| /* We need to set this now, before we call stk1160_set_std */ |
| dev->width = 720; |
| dev->height = (norm & V4L2_STD_525_60) ? 480 : 576; |
| dev->norm = norm; |
| |
| stk1160_set_std(dev); |
| |
| /* Calling with NULL disables frame decimation */ |
| stk1160_set_fmt(dev, NULL); |
| |
| v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, |
| dev->norm); |
| |
| return 0; |
| } |
| |
| |
| static int vidioc_enum_input(struct file *file, void *priv, |
| struct v4l2_input *i) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| if (i->index > STK1160_MAX_INPUT) |
| return -EINVAL; |
| |
| /* S-Video special handling */ |
| if (i->index == STK1160_SVIDEO_INPUT) |
| sprintf(i->name, "S-Video"); |
| else |
| sprintf(i->name, "Composite%d", i->index); |
| |
| i->type = V4L2_INPUT_TYPE_CAMERA; |
| i->std = dev->vdev.tvnorms; |
| return 0; |
| } |
| |
| static int vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| *i = dev->ctl_input; |
| return 0; |
| } |
| |
| static int vidioc_s_input(struct file *file, void *priv, unsigned int i) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| if (i > STK1160_MAX_INPUT) |
| return -EINVAL; |
| |
| dev->ctl_input = i; |
| |
| stk1160_select_input(dev); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| static int vidioc_g_register(struct file *file, void *priv, |
| struct v4l2_dbg_register *reg) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| int rc; |
| u8 val; |
| |
| /* Match host */ |
| rc = stk1160_read_reg(dev, reg->reg, &val); |
| reg->val = val; |
| reg->size = 1; |
| |
| return rc; |
| } |
| |
| static int vidioc_s_register(struct file *file, void *priv, |
| const struct v4l2_dbg_register *reg) |
| { |
| struct stk1160 *dev = video_drvdata(file); |
| |
| /* Match host */ |
| return stk1160_write_reg(dev, reg->reg, reg->val); |
| } |
| #endif |
| |
| static const struct v4l2_ioctl_ops stk1160_ioctl_ops = { |
| .vidioc_querycap = vidioc_querycap, |
| .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt_vid_cap, |
| .vidioc_g_fmt_vid_cap = vidioc_g_fmt_vid_cap, |
| .vidioc_try_fmt_vid_cap = vidioc_try_fmt_vid_cap, |
| .vidioc_s_fmt_vid_cap = vidioc_s_fmt_vid_cap, |
| .vidioc_querystd = vidioc_querystd, |
| .vidioc_g_std = vidioc_g_std, |
| .vidioc_s_std = vidioc_s_std, |
| .vidioc_enum_input = vidioc_enum_input, |
| .vidioc_g_input = vidioc_g_input, |
| .vidioc_s_input = vidioc_s_input, |
| |
| /* vb2 takes care of these */ |
| .vidioc_reqbufs = vb2_ioctl_reqbufs, |
| .vidioc_querybuf = vb2_ioctl_querybuf, |
| .vidioc_qbuf = vb2_ioctl_qbuf, |
| .vidioc_dqbuf = vb2_ioctl_dqbuf, |
| .vidioc_streamon = vb2_ioctl_streamon, |
| .vidioc_streamoff = vb2_ioctl_streamoff, |
| .vidioc_expbuf = vb2_ioctl_expbuf, |
| |
| .vidioc_log_status = v4l2_ctrl_log_status, |
| .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, |
| .vidioc_unsubscribe_event = v4l2_event_unsubscribe, |
| |
| #ifdef CONFIG_VIDEO_ADV_DEBUG |
| .vidioc_g_register = vidioc_g_register, |
| .vidioc_s_register = vidioc_s_register, |
| #endif |
| }; |
| |
| /********************************************************************/ |
| |
| /* |
| * Videobuf2 operations |
| */ |
| static int queue_setup(struct vb2_queue *vq, const struct v4l2_format *v4l_fmt, |
| unsigned int *nbuffers, unsigned int *nplanes, |
| unsigned int sizes[], void *alloc_ctxs[]) |
| { |
| struct stk1160 *dev = vb2_get_drv_priv(vq); |
| unsigned long size; |
| |
| size = dev->width * dev->height * 2; |
| |
| /* |
| * Here we can change the number of buffers being requested. |
| * So, we set a minimum and a maximum like this: |
| */ |
| *nbuffers = clamp_t(unsigned int, *nbuffers, |
| STK1160_MIN_VIDEO_BUFFERS, STK1160_MAX_VIDEO_BUFFERS); |
| |
| /* This means a packed colorformat */ |
| *nplanes = 1; |
| |
| sizes[0] = size; |
| |
| stk1160_dbg("%s: buffer count %d, each %ld bytes\n", |
| __func__, *nbuffers, size); |
| |
| return 0; |
| } |
| |
| static void buffer_queue(struct vb2_buffer *vb) |
| { |
| unsigned long flags; |
| struct stk1160 *dev = vb2_get_drv_priv(vb->vb2_queue); |
| struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); |
| struct stk1160_buffer *buf = |
| container_of(vbuf, struct stk1160_buffer, vb); |
| |
| spin_lock_irqsave(&dev->buf_lock, flags); |
| if (!dev->udev) { |
| /* |
| * If the device is disconnected return the buffer to userspace |
| * directly. The next QBUF call will fail with -ENODEV. |
| */ |
| vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| } else { |
| |
| buf->mem = vb2_plane_vaddr(vb, 0); |
| buf->length = vb2_plane_size(vb, 0); |
| buf->bytesused = 0; |
| buf->pos = 0; |
| |
| /* |
| * If buffer length is less from expected then we return |
| * the buffer to userspace directly. |
| */ |
| if (buf->length < dev->width * dev->height * 2) |
| vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| else |
| list_add_tail(&buf->list, &dev->avail_bufs); |
| |
| } |
| spin_unlock_irqrestore(&dev->buf_lock, flags); |
| } |
| |
| static int start_streaming(struct vb2_queue *vq, unsigned int count) |
| { |
| struct stk1160 *dev = vb2_get_drv_priv(vq); |
| return stk1160_start_streaming(dev); |
| } |
| |
| /* abort streaming and wait for last buffer */ |
| static void stop_streaming(struct vb2_queue *vq) |
| { |
| struct stk1160 *dev = vb2_get_drv_priv(vq); |
| stk1160_stop_streaming(dev); |
| } |
| |
| static struct vb2_ops stk1160_video_qops = { |
| .queue_setup = queue_setup, |
| .buf_queue = buffer_queue, |
| .start_streaming = start_streaming, |
| .stop_streaming = stop_streaming, |
| .wait_prepare = vb2_ops_wait_prepare, |
| .wait_finish = vb2_ops_wait_finish, |
| }; |
| |
| static struct video_device v4l_template = { |
| .name = "stk1160", |
| .tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50, |
| .fops = &stk1160_fops, |
| .ioctl_ops = &stk1160_ioctl_ops, |
| .release = video_device_release_empty, |
| }; |
| |
| /********************************************************************/ |
| |
| /* Must be called with both v4l_lock and vb_queue_lock hold */ |
| void stk1160_clear_queue(struct stk1160 *dev) |
| { |
| struct stk1160_buffer *buf; |
| unsigned long flags; |
| |
| /* Release all active buffers */ |
| spin_lock_irqsave(&dev->buf_lock, flags); |
| while (!list_empty(&dev->avail_bufs)) { |
| buf = list_first_entry(&dev->avail_bufs, |
| struct stk1160_buffer, list); |
| list_del(&buf->list); |
| vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| stk1160_dbg("buffer [%p/%d] aborted\n", |
| buf, buf->vb.vb2_buf.index); |
| } |
| |
| /* It's important to release the current buffer */ |
| if (dev->isoc_ctl.buf) { |
| buf = dev->isoc_ctl.buf; |
| dev->isoc_ctl.buf = NULL; |
| |
| vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR); |
| stk1160_dbg("buffer [%p/%d] aborted\n", |
| buf, buf->vb.vb2_buf.index); |
| } |
| spin_unlock_irqrestore(&dev->buf_lock, flags); |
| } |
| |
| int stk1160_vb2_setup(struct stk1160 *dev) |
| { |
| int rc; |
| struct vb2_queue *q; |
| |
| q = &dev->vb_vidq; |
| q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
| q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR | VB2_DMABUF; |
| q->drv_priv = dev; |
| q->buf_struct_size = sizeof(struct stk1160_buffer); |
| q->ops = &stk1160_video_qops; |
| q->mem_ops = &vb2_vmalloc_memops; |
| q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; |
| |
| rc = vb2_queue_init(q); |
| if (rc < 0) |
| return rc; |
| |
| /* initialize video dma queue */ |
| INIT_LIST_HEAD(&dev->avail_bufs); |
| |
| return 0; |
| } |
| |
| int stk1160_video_register(struct stk1160 *dev) |
| { |
| int rc; |
| |
| /* Initialize video_device with a template structure */ |
| dev->vdev = v4l_template; |
| dev->vdev.queue = &dev->vb_vidq; |
| |
| /* |
| * Provide mutexes for v4l2 core and for videobuf2 queue. |
| * It will be used to protect *only* v4l2 ioctls. |
| */ |
| dev->vdev.lock = &dev->v4l_lock; |
| dev->vdev.queue->lock = &dev->vb_queue_lock; |
| |
| /* This will be used to set video_device parent */ |
| dev->vdev.v4l2_dev = &dev->v4l2_dev; |
| |
| /* NTSC is default */ |
| dev->norm = V4L2_STD_NTSC_M; |
| dev->width = 720; |
| dev->height = 480; |
| |
| /* set default format */ |
| dev->fmt = &format[0]; |
| stk1160_set_std(dev); |
| |
| v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_std, |
| dev->norm); |
| |
| video_set_drvdata(&dev->vdev, dev); |
| rc = video_register_device(&dev->vdev, VFL_TYPE_GRABBER, -1); |
| if (rc < 0) { |
| stk1160_err("video_register_device failed (%d)\n", rc); |
| return rc; |
| } |
| |
| v4l2_info(&dev->v4l2_dev, "V4L2 device registered as %s\n", |
| video_device_node_name(&dev->vdev)); |
| |
| return 0; |
| } |