diff options
Diffstat (limited to 'drivers/media/video/stk1160/stk1160-v4l.c')
| -rw-r--r-- | drivers/media/video/stk1160/stk1160-v4l.c | 738 |
1 files changed, 0 insertions, 738 deletions
diff --git a/drivers/media/video/stk1160/stk1160-v4l.c b/drivers/media/video/stk1160/stk1160-v4l.c deleted file mode 100644 index 360bdbee4270..000000000000 --- a/drivers/media/video/stk1160/stk1160-v4l.c +++ /dev/null @@ -1,738 +0,0 @@ -/* - * 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/v4l2-chip-ident.h> -#include <media/videobuf2-vmalloc.h> - -#include <media/saa7115.h> - -#include "stk1160.h" -#include "stk1160-reg.h" - -static unsigned int vidioc_debug; -module_param(vidioc_debug, int, 0644); -MODULE_PARM_DESC(vidioc_debug, "enable debug messages [vidioc]"); - -static bool keep_buffers; -module_param(keep_buffers, bool, 0644); -MODULE_PARM_DESC(keep_buffers, "don't release buffers upon stop streaming"); - -/* supported video standards */ -static struct stk1160_fmt format[] = { - { - .name = "16 bpp YUY2, 4:2:2, packed", - .fourcc = V4L2_PIX_FMT_UYVY, - .depth = 16, - } -}; - -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); - } - -} - -/* - * 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_info("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) -{ - int i, rc; - bool new_pkt_size; - - /* 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) - return rc; - } - - /* 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); - stk1160_uninit_isoc(dev); - return rc; - } - } - - /* Start saa711x */ - v4l2_device_call_all(&dev->v4l2_dev, 0, video, s_stream, 1); - - /* 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; -} - -/* 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_info("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; - - 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 vidioc_try_fmt_vid_cap(struct file *file, void *priv, - struct v4l2_format *f) -{ - struct stk1160 *dev = video_drvdata(file); - - if (f->fmt.pix.pixelformat != format[0].fourcc) { - stk1160_err("fourcc format 0x%08x invalid\n", - f->fmt.pix.pixelformat); - return -EINVAL; - } - - /* - * User can't choose size at his own will, - * so we just return him the current size chosen - * at standard selection. - * TODO: Implement frame scaling? - */ - - f->fmt.pix.width = dev->width; - f->fmt.pix.height = dev->height; - f->fmt.pix.field = V4L2_FIELD_INTERLACED; - 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 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; - int rc; - - if (vb2_is_busy(q)) - return -EBUSY; - - rc = vidioc_try_fmt_vid_cap(file, priv, f); - if (rc < 0) - return rc; - - /* We don't support any format changes */ - - 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 (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->norm = *norm; - - /* This is taken from saa7115 video decoder */ - if (dev->norm & V4L2_STD_525_60) { - dev->width = 720; - dev->height = 480; - } else if (dev->norm & V4L2_STD_625_50) { - dev->width = 720; - dev->height = 576; - } else { - stk1160_err("invalid standard\n"); - return -EINVAL; - } - - stk1160_set_std(dev); - - v4l2_device_call_all(&dev->v4l2_dev, 0, core, 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; - - 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 (vb2_is_busy(&dev->vb_vidq)) - return -EBUSY; - - if (i > STK1160_MAX_INPUT) - return -EINVAL; - - dev->ctl_input = i; - - stk1160_select_input(dev); - - return 0; -} - -static int vidioc_g_chip_ident(struct file *file, void *priv, - struct v4l2_dbg_chip_ident *chip) -{ - switch (chip->match.type) { - case V4L2_CHIP_MATCH_HOST: - chip->ident = V4L2_IDENT_NONE; - chip->revision = 0; - return 0; - default: - return -EINVAL; - } -} - -#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; - - switch (reg->match.type) { - case V4L2_CHIP_MATCH_AC97: - /* TODO: Support me please :-( */ - return -EINVAL; - case V4L2_CHIP_MATCH_I2C_DRIVER: - v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); - return 0; - case V4L2_CHIP_MATCH_I2C_ADDR: - /* TODO: is this correct? */ - v4l2_device_call_all(&dev->v4l2_dev, 0, core, g_register, reg); - return 0; - default: - if (!v4l2_chip_match_host(®->match)) - return -EINVAL; - } - - /* 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, - struct v4l2_dbg_register *reg) -{ - struct stk1160 *dev = video_drvdata(file); - - switch (reg->match.type) { - case V4L2_CHIP_MATCH_AC97: - return -EINVAL; - case V4L2_CHIP_MATCH_I2C_DRIVER: - v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); - return 0; - case V4L2_CHIP_MATCH_I2C_ADDR: - /* TODO: is this correct? */ - v4l2_device_call_all(&dev->v4l2_dev, 0, core, s_register, reg); - return 0; - default: - if (!v4l2_chip_match_host(®->match)) - return -EINVAL; - } - - /* Match host */ - return stk1160_write_reg(dev, reg->reg, cpu_to_le16(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_log_status = v4l2_ctrl_log_status, - .vidioc_subscribe_event = v4l2_ctrl_subscribe_event, - .vidioc_unsubscribe_event = v4l2_event_unsubscribe, - .vidioc_g_chip_ident = vidioc_g_chip_ident, - -#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_info("%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 stk1160_buffer *buf = - container_of(vb, 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_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_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 int stop_streaming(struct vb2_queue *vq) -{ - struct stk1160 *dev = vb2_get_drv_priv(vq); - return 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_STATE_ERROR); - stk1160_info("buffer [%p/%d] aborted\n", - buf, buf->vb.v4l2_buf.index); - } - /* It's important to clear current buffer */ - dev->isoc_ctl.buf = NULL; - spin_unlock_irqrestore(&dev->buf_lock, flags); -} - -int stk1160_vb2_setup(struct stk1160 *dev) -{ - int rc; - struct vb2_queue *q; - - q = &dev->vb_vidq; - memset(q, 0, sizeof(dev->vb_vidq)); - q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; - q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR; - q->drv_priv = dev; - q->buf_struct_size = sizeof(struct stk1160_buffer); - q->ops = &stk1160_video_qops; - q->mem_ops = &vb2_vmalloc_memops; - - 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.debug = vidioc_debug; - 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; - set_bit(V4L2_FL_USE_FH_PRIO, &dev->vdev.flags); - - /* 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, core, 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; -} |