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authorMike Isely <isely@isely.net>2006-06-26 20:58:46 -0300
committerMauro Carvalho Chehab <mchehab@infradead.org>2006-06-27 00:17:15 -0300
commitd855497edbfbf9e19a17f4a1154bca69cb4bd9ba (patch)
treeb39bef23fc00c91dac73ae171ad6ba7261170918 /drivers/media/video/pvrusb2/pvrusb2-v4l2.c
parenteb99adde31b7d85c67a5e1c2fa5e098e1056dd79 (diff)
V4L/DVB (4228a): pvrusb2 to kernel 2.6.18
Implement V4L2 driver for the Hauppauge PVR USB2 TV tuner. The Hauppauge PVR USB2 is a USB connected TV tuner with an embedded cx23416 hardware MPEG2 encoder. There are two major variants of this device; this driver handles both. Any V4L2 application which understands MPEG2 video stream data should be able to work with this device. Signed-off-by: Mike Isely <isely@pobox.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-v4l2.c')
-rw-r--r--drivers/media/video/pvrusb2/pvrusb2-v4l2.c1056
1 files changed, 1056 insertions, 0 deletions
diff --git a/drivers/media/video/pvrusb2/pvrusb2-v4l2.c b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
new file mode 100644
index 00000000000..74b681aeda2
--- /dev/null
+++ b/drivers/media/video/pvrusb2/pvrusb2-v4l2.c
@@ -0,0 +1,1056 @@
+/*
+ *
+ * $Id$
+ *
+ * Copyright (C) 2005 Mike Isely <isely@pobox.com>
+ * Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
+ *
+ * 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
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include "pvrusb2-context.h"
+#include "pvrusb2-hdw.h"
+#include "pvrusb2.h"
+#include "pvrusb2-debug.h"
+#include "pvrusb2-v4l2.h"
+#include "pvrusb2-ioread.h"
+#include <linux/videodev2.h>
+#include <media/v4l2-common.h>
+
+struct pvr2_v4l2_dev;
+struct pvr2_v4l2_fh;
+struct pvr2_v4l2;
+
+/* V4L no longer provide the ability to set / get a private context pointer
+ (i.e. video_get_drvdata / video_set_drvdata), which means we have to
+ concoct our own context locating mechanism. Supposedly this is intended
+ to simplify driver implementation. It's not clear to me how that can
+ possibly be true. Our solution here is to maintain a lookup table of
+ our context instances, indexed by the minor device number of the V4L
+ device. See pvr2_v4l2_open() for some implications of this approach. */
+static struct pvr2_v4l2_dev *devices[256];
+static DEFINE_MUTEX(device_lock);
+
+struct pvr2_v4l2_dev {
+ struct pvr2_v4l2 *v4lp;
+ struct video_device *vdev;
+ struct pvr2_context_stream *stream;
+ int ctxt_idx;
+ enum pvr2_config config;
+};
+
+struct pvr2_v4l2_fh {
+ struct pvr2_channel channel;
+ struct pvr2_v4l2_dev *dev_info;
+ enum v4l2_priority prio;
+ struct pvr2_ioread *rhp;
+ struct file *file;
+ struct pvr2_v4l2 *vhead;
+ struct pvr2_v4l2_fh *vnext;
+ struct pvr2_v4l2_fh *vprev;
+ wait_queue_head_t wait_data;
+ int fw_mode_flag;
+};
+
+struct pvr2_v4l2 {
+ struct pvr2_channel channel;
+ struct pvr2_v4l2_fh *vfirst;
+ struct pvr2_v4l2_fh *vlast;
+
+ struct v4l2_prio_state prio;
+
+ /* streams */
+ struct pvr2_v4l2_dev video_dev;
+};
+
+static int video_nr[PVR_NUM] = {[0 ... PVR_NUM-1] = -1};
+module_param_array(video_nr, int, NULL, 0444);
+MODULE_PARM_DESC(video_nr, "Offset for device's minor");
+
+struct v4l2_capability pvr_capability ={
+ .driver = "pvrusb2",
+ .card = "Hauppauge WinTV pvr-usb2",
+ .bus_info = "usb",
+ .version = KERNEL_VERSION(0,8,0),
+ .capabilities = (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VBI_CAPTURE |
+ V4L2_CAP_TUNER | V4L2_CAP_AUDIO |
+ V4L2_CAP_READWRITE),
+ .reserved = {0,0,0,0}
+};
+
+static struct v4l2_tuner pvr_v4l2_tuners[]= {
+ {
+ .index = 0,
+ .name = "TV Tuner",
+ .type = V4L2_TUNER_ANALOG_TV,
+ .capability = (V4L2_TUNER_CAP_NORM |
+ V4L2_TUNER_CAP_STEREO |
+ V4L2_TUNER_CAP_LANG1 |
+ V4L2_TUNER_CAP_LANG2),
+ .rangelow = 0,
+ .rangehigh = 0,
+ .rxsubchans = V4L2_TUNER_SUB_STEREO,
+ .audmode = V4L2_TUNER_MODE_STEREO,
+ .signal = 0,
+ .afc = 0,
+ .reserved = {0,0,0,0}
+ }
+};
+
+struct v4l2_fmtdesc pvr_fmtdesc [] = {
+ {
+ .index = 0,
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .flags = V4L2_FMT_FLAG_COMPRESSED,
+ .description = "MPEG1/2",
+ // This should really be V4L2_PIX_FMT_MPEG, but xawtv
+ // breaks when I do that.
+ .pixelformat = 0, // V4L2_PIX_FMT_MPEG,
+ .reserved = { 0, 0, 0, 0 }
+ }
+};
+
+#define PVR_FORMAT_PIX 0
+#define PVR_FORMAT_VBI 1
+
+struct v4l2_format pvr_format [] = {
+ [PVR_FORMAT_PIX] = {
+ .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
+ .fmt = {
+ .pix = {
+ .width = 720,
+ .height = 576,
+ // This should really be V4L2_PIX_FMT_MPEG,
+ // but xawtv breaks when I do that.
+ .pixelformat = 0, // V4L2_PIX_FMT_MPEG,
+ .field = V4L2_FIELD_INTERLACED,
+ .bytesperline = 0, // doesn't make sense
+ // here
+ //FIXME : Don't know what to put here...
+ .sizeimage = (32*1024),
+ .colorspace = 0, // doesn't make sense here
+ .priv = 0
+ }
+ }
+ },
+ [PVR_FORMAT_VBI] = {
+ .type = V4L2_BUF_TYPE_VBI_CAPTURE,
+ .fmt = {
+ .vbi = {
+ .sampling_rate = 27000000,
+ .offset = 248,
+ .samples_per_line = 1443,
+ .sample_format = V4L2_PIX_FMT_GREY,
+ .start = { 0, 0 },
+ .count = { 0, 0 },
+ .flags = 0,
+ .reserved = { 0, 0 }
+ }
+ }
+ }
+};
+
+/*
+ * pvr_ioctl()
+ *
+ * This is part of Video 4 Linux API. The procedure handles ioctl() calls.
+ *
+ */
+static int pvr2_v4l2_do_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, void *arg)
+{
+ struct pvr2_v4l2_fh *fh = file->private_data;
+ struct pvr2_v4l2 *vp = fh->vhead;
+ struct pvr2_v4l2_dev *dev_info = fh->dev_info;
+ struct pvr2_hdw *hdw = fh->channel.mc_head->hdw;
+ int ret = -EINVAL;
+
+ if (pvrusb2_debug & PVR2_TRACE_V4LIOCTL) {
+ v4l_print_ioctl(pvr2_hdw_get_driver_name(hdw),cmd);
+ }
+
+ if (!pvr2_hdw_dev_ok(hdw)) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "ioctl failed - bad or no context");
+ return -EFAULT;
+ }
+
+ /* check priority */
+ switch (cmd) {
+ case VIDIOC_S_CTRL:
+ case VIDIOC_S_STD:
+ case VIDIOC_S_INPUT:
+ case VIDIOC_S_TUNER:
+ case VIDIOC_S_FREQUENCY:
+ ret = v4l2_prio_check(&vp->prio, &fh->prio);
+ if (ret)
+ return ret;
+ }
+
+ switch (cmd) {
+ case VIDIOC_QUERYCAP:
+ {
+ struct v4l2_capability *cap = arg;
+
+ memcpy(cap, &pvr_capability, sizeof(struct v4l2_capability));
+
+ ret = 0;
+ break;
+ }
+
+ case VIDIOC_G_PRIORITY:
+ {
+ enum v4l2_priority *p = arg;
+
+ *p = v4l2_prio_max(&vp->prio);
+ ret = 0;
+ break;
+ }
+
+ case VIDIOC_S_PRIORITY:
+ {
+ enum v4l2_priority *prio = arg;
+
+ ret = v4l2_prio_change(&vp->prio, &fh->prio, *prio);
+ break;
+ }
+
+ case VIDIOC_ENUMSTD:
+ {
+ struct v4l2_standard *vs = (struct v4l2_standard *)arg;
+ int idx = vs->index;
+ ret = pvr2_hdw_get_stdenum_value(hdw,vs,idx+1);
+ break;
+ }
+
+ case VIDIOC_G_STD:
+ {
+ int val = 0;
+ ret = pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_STDCUR),&val);
+ *(v4l2_std_id *)arg = val;
+ break;
+ }
+
+ case VIDIOC_S_STD:
+ {
+ ret = pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_STDCUR),
+ *(v4l2_std_id *)arg);
+ break;
+ }
+
+ case VIDIOC_ENUMINPUT:
+ {
+ struct pvr2_ctrl *cptr;
+ struct v4l2_input *vi = (struct v4l2_input *)arg;
+ struct v4l2_input tmp;
+ unsigned int cnt;
+
+ cptr = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT);
+
+ memset(&tmp,0,sizeof(tmp));
+ tmp.index = vi->index;
+ ret = 0;
+ switch (vi->index) {
+ case PVR2_CVAL_INPUT_TV:
+ case PVR2_CVAL_INPUT_RADIO:
+ tmp.type = V4L2_INPUT_TYPE_TUNER;
+ break;
+ case PVR2_CVAL_INPUT_SVIDEO:
+ case PVR2_CVAL_INPUT_COMPOSITE:
+ tmp.type = V4L2_INPUT_TYPE_CAMERA;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ if (ret < 0) break;
+
+ cnt = 0;
+ pvr2_ctrl_get_valname(cptr,vi->index,
+ tmp.name,sizeof(tmp.name)-1,&cnt);
+ tmp.name[cnt] = 0;
+
+ /* Don't bother with audioset, since this driver currently
+ always switches the audio whenever the video is
+ switched. */
+
+ /* Handling std is a tougher problem. It doesn't make
+ sense in cases where a device might be multi-standard.
+ We could just copy out the current value for the
+ standard, but it can change over time. For now just
+ leave it zero. */
+
+ memcpy(vi, &tmp, sizeof(tmp));
+
+ ret = 0;
+ break;
+ }
+
+ case VIDIOC_G_INPUT:
+ {
+ struct pvr2_ctrl *cptr;
+ struct v4l2_input *vi = (struct v4l2_input *)arg;
+ int val;
+ cptr = pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT);
+ val = 0;
+ ret = pvr2_ctrl_get_value(cptr,&val);
+ vi->index = val;
+ break;
+ }
+
+ case VIDIOC_S_INPUT:
+ {
+ struct v4l2_input *vi = (struct v4l2_input *)arg;
+ ret = pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_INPUT),
+ vi->index);
+ break;
+ }
+
+ case VIDIOC_ENUMAUDIO:
+ {
+ ret = -EINVAL;
+ break;
+ }
+
+ case VIDIOC_G_AUDIO:
+ {
+ ret = -EINVAL;
+ break;
+ }
+
+ case VIDIOC_S_AUDIO:
+ {
+ ret = -EINVAL;
+ break;
+ }
+ case VIDIOC_G_TUNER:
+ {
+ struct v4l2_tuner *vt = (struct v4l2_tuner *)arg;
+ unsigned int status_mask;
+ int val;
+ if (vt->index !=0) break;
+
+ status_mask = pvr2_hdw_get_signal_status(hdw);
+
+ memcpy(vt, &pvr_v4l2_tuners[vt->index],
+ sizeof(struct v4l2_tuner));
+
+ vt->signal = 0;
+ if (status_mask & PVR2_SIGNAL_OK) {
+ if (status_mask & PVR2_SIGNAL_STEREO) {
+ vt->rxsubchans = V4L2_TUNER_SUB_STEREO;
+ } else {
+ vt->rxsubchans = V4L2_TUNER_SUB_MONO;
+ }
+ if (status_mask & PVR2_SIGNAL_SAP) {
+ vt->rxsubchans |= (V4L2_TUNER_SUB_LANG1 |
+ V4L2_TUNER_SUB_LANG2);
+ }
+ vt->signal = 65535;
+ }
+
+ val = 0;
+ ret = pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_AUDIOMODE),
+ &val);
+ vt->audmode = val;
+ break;
+ }
+
+ case VIDIOC_S_TUNER:
+ {
+ struct v4l2_tuner *vt=(struct v4l2_tuner *)arg;
+
+ if (vt->index != 0)
+ break;
+
+ ret = pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_AUDIOMODE),
+ vt->audmode);
+ }
+
+ case VIDIOC_S_FREQUENCY:
+ {
+ const struct v4l2_frequency *vf = (struct v4l2_frequency *)arg;
+ ret = pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_FREQUENCY),
+ vf->frequency * 62500);
+ break;
+ }
+
+ case VIDIOC_G_FREQUENCY:
+ {
+ struct v4l2_frequency *vf = (struct v4l2_frequency *)arg;
+ int val = 0;
+ ret = pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_FREQUENCY),
+ &val);
+ val /= 62500;
+ vf->frequency = val;
+ break;
+ }
+
+ case VIDIOC_ENUM_FMT:
+ {
+ struct v4l2_fmtdesc *fd = (struct v4l2_fmtdesc *)arg;
+
+ /* Only one format is supported : mpeg.*/
+ if (fd->index != 0)
+ break;
+
+ memcpy(fd, pvr_fmtdesc, sizeof(struct v4l2_fmtdesc));
+ ret = 0;
+ break;
+ }
+
+ case VIDIOC_G_FMT:
+ {
+ struct v4l2_format *vf = (struct v4l2_format *)arg;
+ int val;
+ switch(vf->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE:
+ memcpy(vf, &pvr_format[PVR_FORMAT_PIX],
+ sizeof(struct v4l2_format));
+ val = 0;
+ pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_HRES),
+ &val);
+ vf->fmt.pix.width = val;
+ val = 0;
+ pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,
+ PVR2_CID_INTERLACE),
+ &val);
+ if (val) vf->fmt.pix.width /= 2;
+ val = 0;
+ pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_VRES),
+ &val);
+ vf->fmt.pix.height = val;
+ ret = 0;
+ break;
+ case V4L2_BUF_TYPE_VBI_CAPTURE:
+ // ????? Still need to figure out to do VBI correctly
+ ret = -EINVAL;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ }
+
+ case VIDIOC_TRY_FMT:
+ case VIDIOC_S_FMT:
+ {
+ struct v4l2_format *vf = (struct v4l2_format *)arg;
+
+ ret = 0;
+ switch(vf->type) {
+ case V4L2_BUF_TYPE_VIDEO_CAPTURE: {
+ int h = vf->fmt.pix.height;
+ int w = vf->fmt.pix.width;
+ int vd_std, hf, hh;
+
+ vd_std = 0;
+ pvr2_ctrl_get_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,PVR2_CID_STDCUR),
+ &vd_std);
+ if (vd_std & V4L2_STD_525_60) {
+ hf=480;
+ } else {
+ hf=576;
+ }
+ hh = (int) (hf / 2);
+
+ memcpy(vf, &pvr_format[PVR_FORMAT_PIX],
+ sizeof(struct v4l2_format));
+ if (w > 720)
+ vf->fmt.pix.width = 720;
+ vf->fmt.pix.width &= 0xff0;
+ vf->fmt.pix.height = (h > hh) ? hf : hh;
+
+ if (cmd == VIDIOC_S_FMT) {
+ pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,
+ PVR2_CID_HRES),
+ vf->fmt.pix.width);
+ pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(hdw,
+ PVR2_CID_VRES),
+ vf->fmt.pix.height);
+ pvr2_ctrl_set_value(
+ pvr2_hdw_get_ctrl_by_id(
+ hdw,PVR2_CID_INTERLACE),
+ vf->fmt.pix.height != hf);
+ }
+ } break;
+ case V4L2_BUF_TYPE_VBI_CAPTURE:
+ // ????? Still need to figure out to do VBI correctly
+ ret = -EINVAL;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ }
+
+ case VIDIOC_STREAMON:
+ {
+ ret = pvr2_hdw_set_stream_type(hdw,dev_info->config);
+ if (ret < 0) return ret;
+ ret = pvr2_hdw_set_streaming(hdw,!0);
+ break;
+ }
+
+ case VIDIOC_STREAMOFF:
+ {
+ ret = pvr2_hdw_set_streaming(hdw,0);
+ break;
+ }
+
+ case VIDIOC_QUERYCTRL:
+ {
+ struct pvr2_ctrl *cptr;
+ struct v4l2_queryctrl *vc = (struct v4l2_queryctrl *)arg;
+ ret = 0;
+ cptr = pvr2_hdw_get_ctrl_v4l(hdw,vc->id);
+ if (!cptr) {
+ ret = -EINVAL;
+ break;
+ }
+
+ strlcpy(vc->name,pvr2_ctrl_get_name(cptr),sizeof(vc->name));
+ vc->default_value = pvr2_ctrl_get_def(cptr);
+ switch (pvr2_ctrl_get_type(cptr)) {
+ case pvr2_ctl_enum:
+ vc->type = V4L2_CTRL_TYPE_MENU;
+ vc->minimum = 0;
+ vc->maximum = pvr2_ctrl_get_cnt(cptr) - 1;
+ vc->step = 1;
+ break;
+ case pvr2_ctl_int:
+ vc->type = V4L2_CTRL_TYPE_INTEGER;
+ vc->minimum = pvr2_ctrl_get_min(cptr);
+ vc->maximum = pvr2_ctrl_get_max(cptr);
+ vc->step = 1;
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ break;
+ }
+
+ case VIDIOC_QUERYMENU:
+ {
+ struct v4l2_querymenu *vm = (struct v4l2_querymenu *)arg;
+ unsigned int cnt = 0;
+ ret = pvr2_ctrl_get_valname(pvr2_hdw_get_ctrl_v4l(hdw,vm->id),
+ vm->index,
+ vm->name,sizeof(vm->name)-1,
+ &cnt);
+ vm->name[cnt] = 0;
+ break;
+ }
+
+ case VIDIOC_G_CTRL:
+ {
+ struct v4l2_control *vc = (struct v4l2_control *)arg;
+ int val = 0;
+ ret = pvr2_ctrl_get_value(pvr2_hdw_get_ctrl_v4l(hdw,vc->id),
+ &val);
+ vc->value = val;
+ break;
+ }
+
+ case VIDIOC_S_CTRL:
+ {
+ struct v4l2_control *vc = (struct v4l2_control *)arg;
+ ret = pvr2_ctrl_set_value(pvr2_hdw_get_ctrl_v4l(hdw,vc->id),
+ vc->value);
+ break;
+ }
+
+ case VIDIOC_LOG_STATUS:
+ {
+ int nr = pvr2_hdw_get_unit_number(hdw);
+
+ printk(KERN_INFO "pvrusb2: ================= START STATUS CARD #%d =================\n", nr);
+ pvr2_hdw_trigger_module_log(hdw);
+ printk(KERN_INFO "pvrusb2: ================== END STATUS CARD #%d ==================\n", nr);
+ ret = 0;
+ break;
+ }
+
+ default :
+ ret = v4l_compat_translate_ioctl(inode,file,cmd,
+ arg,pvr2_v4l2_do_ioctl);
+ }
+
+ pvr2_hdw_commit_ctl(hdw);
+
+ if (ret < 0) {
+ if (pvrusb2_debug & PVR2_TRACE_V4LIOCTL) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "pvr2_v4l2_do_ioctl failure, ret=%d",ret);
+ } else {
+ if (pvrusb2_debug & PVR2_TRACE_ERROR_LEGS) {
+ pvr2_trace(PVR2_TRACE_ERROR_LEGS,
+ "pvr2_v4l2_do_ioctl failure, ret=%d"
+ " command was:",ret);
+ v4l_print_ioctl(pvr2_hdw_get_driver_name(hdw),
+ cmd);
+ }
+ }
+ } else {
+ pvr2_trace(PVR2_TRACE_V4LIOCTL,
+ "pvr2_v4l2_do_ioctl complete, ret=%d (0x%x)",
+ ret,ret);
+ }
+ return ret;
+}
+
+
+static void pvr2_v4l2_dev_destroy(struct pvr2_v4l2_dev *dip)
+{
+ pvr2_trace(PVR2_TRACE_INIT,
+ "unregistering device video%d [%s]",
+ dip->vdev->minor,pvr2_config_get_name(dip->config));
+ if (dip->ctxt_idx >= 0) {
+ mutex_lock(&device_lock);
+ devices[dip->ctxt_idx] = NULL;
+ dip->ctxt_idx = -1;
+ mutex_unlock(&device_lock);
+ }
+ video_unregister_device(dip->vdev);
+}
+
+
+static void pvr2_v4l2_destroy_no_lock(struct pvr2_v4l2 *vp)
+{
+ pvr2_hdw_v4l_store_minor_number(vp->channel.mc_head->hdw,-1);
+ pvr2_v4l2_dev_destroy(&vp->video_dev);
+
+ pvr2_trace(PVR2_TRACE_STRUCT,"Destroying pvr2_v4l2 id=%p",vp);
+ pvr2_channel_done(&vp->channel);
+ kfree(vp);
+}
+
+
+void pvr2_v4l2_internal_check(struct pvr2_channel *chp)
+{
+ struct pvr2_v4l2 *vp;
+ vp = container_of(chp,struct pvr2_v4l2,channel);
+ if (!vp->channel.mc_head->disconnect_flag) return;
+ if (vp->vfirst) return;
+ pvr2_v4l2_destroy_no_lock(vp);
+}
+
+
+int pvr2_v4l2_ioctl(struct inode *inode, struct file *file,
+ unsigned int cmd, unsigned long arg)
+{
+
+/* Temporary hack : use ivtv api until a v4l2 one is available. */
+#define IVTV_IOC_G_CODEC 0xFFEE7703
+#define IVTV_IOC_S_CODEC 0xFFEE7704
+ if (cmd == IVTV_IOC_G_CODEC || cmd == IVTV_IOC_S_CODEC) return 0;
+ return video_usercopy(inode, file, cmd, arg, pvr2_v4l2_do_ioctl);
+}
+
+
+int pvr2_v4l2_release(struct inode *inode, struct file *file)
+{
+ struct pvr2_v4l2_fh *fhp = file->private_data;
+ struct pvr2_v4l2 *vp = fhp->vhead;
+ struct pvr2_context *mp = fhp->vhead->channel.mc_head;
+
+ pvr2_trace(PVR2_TRACE_OPEN_CLOSE,"pvr2_v4l2_release");
+
+ if (fhp->rhp) {
+ struct pvr2_stream *sp;
+ struct pvr2_hdw *hdw;
+ hdw = fhp->channel.mc_head->hdw;
+ pvr2_hdw_set_streaming(hdw,0);
+ sp = pvr2_ioread_get_stream(fhp->rhp);
+ if (sp) pvr2_stream_set_callback(sp,0,0);
+ pvr2_ioread_destroy(fhp->rhp);
+ fhp->rhp = 0;
+ }
+ v4l2_prio_close(&vp->prio, &fhp->prio);
+ file->private_data = NULL;
+
+ pvr2_context_enter(mp); do {
+ if (fhp->vnext) {
+ fhp->vnext->vprev = fhp->vprev;
+ } else {
+ vp->vlast = fhp->vprev;
+ }
+ if (fhp->vprev) {
+ fhp->vprev->vnext = fhp->vnext;
+ } else {
+ vp->vfirst = fhp->vnext;
+ }
+ fhp->vnext = 0;
+ fhp->vprev = 0;
+ fhp->vhead = 0;
+ pvr2_channel_done(&fhp->channel);
+ pvr2_trace(PVR2_TRACE_STRUCT,
+ "Destroying pvr_v4l2_fh id=%p",fhp);
+ kfree(fhp);
+ if (vp->channel.mc_head->disconnect_flag && !vp->vfirst) {
+ pvr2_v4l2_destroy_no_lock(vp);
+ }
+ } while (0); pvr2_context_exit(mp);
+ return 0;
+}
+
+
+int pvr2_v4l2_open(struct inode *inode, struct file *file)
+{
+ struct pvr2_v4l2_dev *dip = 0; /* Our own context pointer */
+ struct pvr2_v4l2_fh *fhp;
+ struct pvr2_v4l2 *vp;
+ struct pvr2_hdw *hdw;
+
+ mutex_lock(&device_lock);
+ /* MCI 7-Jun-2006 Even though we're just doing what amounts to an
+ atomic read of the device mapping array here, we still need the
+ mutex. The problem is that there is a tiny race possible when
+ we register the device. We can't update the device mapping
+ array until after the device has been registered, owing to the
+ fact that we can't know the minor device number until after the
+ registration succeeds. And if another thread tries to open the
+ device in the window of time after registration but before the
+ map is updated, then it will get back an erroneous null pointer
+ and the open will result in a spurious failure. The only way to
+ prevent that is to (a) be inside the mutex here before we access
+ the array, and (b) cover the entire registration process later
+ on with this same mutex. Thus if we get inside the mutex here,
+ then we can be assured that the registration process actually
+ completed correctly. This is an unhappy complication from the
+ use of global data in a driver that lives in a preemptible
+ environment. It sure would be nice if the video device itself
+ had a means for storing and retrieving a local context pointer.
+ Oh wait. It did. But now it's gone. Silly me. */
+ {
+ unsigned int midx = iminor(file->f_dentry->d_inode);
+ if (midx < sizeof(devices)/sizeof(devices[0])) {
+ dip = devices[midx];
+ }
+ }
+ mutex_unlock(&device_lock);
+
+ if (!dip) return -ENODEV; /* Should be impossible but I'm paranoid */
+
+ vp = dip->v4lp;
+ hdw = vp->channel.hdw;
+
+ pvr2_trace(PVR2_TRACE_OPEN_CLOSE,"pvr2_v4l2_open");
+
+ if (!pvr2_hdw_dev_ok(hdw)) {
+ pvr2_trace(PVR2_TRACE_OPEN_CLOSE,
+ "pvr2_v4l2_open: hardware not ready");
+ return -EIO;
+ }
+
+ fhp = kmalloc(sizeof(*fhp),GFP_KERNEL);
+ if (!fhp) {
+ return -ENOMEM;
+ }
+ memset(fhp,0,sizeof(*fhp));
+
+ init_waitqueue_head(&fhp->wait_data);
+ fhp->dev_info = dip;
+
+ pvr2_context_enter(vp->channel.mc_head); do {
+ pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr_v4l2_fh id=%p",fhp);
+ pvr2_channel_init(&fhp->channel,vp->channel.mc_head);
+ fhp->vnext = 0;
+ fhp->vprev = vp->vlast;
+ if (vp->vlast) {
+ vp->vlast->vnext = fhp;
+ } else {
+ vp->vfirst = fhp;
+ }
+ vp->vlast = fhp;
+ fhp->vhead = vp;
+ } while (0); pvr2_context_exit(vp->channel.mc_head);
+
+ fhp->file = file;
+ file->private_data = fhp;
+ v4l2_prio_open(&vp->prio,&fhp->prio);
+
+ fhp->fw_mode_flag = pvr2_hdw_cpufw_get_enabled(hdw);
+
+ return 0;
+}
+
+
+static void pvr2_v4l2_notify(struct pvr2_v4l2_fh *fhp)
+{
+ wake_up(&fhp->wait_data);
+}
+
+static int pvr2_v4l2_iosetup(struct pvr2_v4l2_fh *fh)
+{
+ int ret;
+ struct pvr2_stream *sp;
+ struct pvr2_hdw *hdw;
+ if (fh->rhp) return 0;
+
+ /* First read() attempt. Try to claim the stream and start
+ it... */
+ if ((ret = pvr2_channel_claim_stream(&fh->channel,
+ fh->dev_info->stream)) != 0) {
+ /* Someone else must already have it */
+ return ret;
+ }
+
+ fh->rhp = pvr2_channel_create_mpeg_stream(fh->dev_info->stream);
+ if (!fh->rhp) {
+ pvr2_channel_claim_stream(&fh->channel,0);
+ return -ENOMEM;
+ }
+
+ hdw = fh->channel.mc_head->hdw;
+ sp = fh->dev_info->stream->stream;
+ pvr2_stream_set_callback(sp,(pvr2_stream_callback)pvr2_v4l2_notify,fh);
+ pvr2_hdw_set_stream_type(hdw,fh->dev_info->config);
+ pvr2_hdw_set_streaming(hdw,!0);
+ ret = pvr2_ioread_set_enabled(fh->rhp,!0);
+
+ return ret;
+}
+
+
+static ssize_t pvr2_v4l2_read(struct file *file,
+ char __user *buff, size_t count, loff_t *ppos)
+{
+ struct pvr2_v4l2_fh *fh = file->private_data;
+ int ret;
+
+ if (fh->fw_mode_flag) {
+ struct pvr2_hdw *hdw = fh->channel.mc_head->hdw;
+ char *tbuf;
+ int c1,c2;
+ int tcnt = 0;
+ unsigned int offs = *ppos;
+
+ tbuf = kmalloc(PAGE_SIZE,GFP_KERNEL);
+ if (!tbuf) return -ENOMEM;
+
+ while (count) {
+ c1 = count;
+ if (c1 > PAGE_SIZE) c1 = PAGE_SIZE;
+ c2 = pvr2_hdw_cpufw_get(hdw,offs,tbuf,c1);
+ if (c2 < 0) {
+ tcnt = c2;
+ break;
+ }
+ if (!c2) break;
+ if (copy_to_user(buff,tbuf,c2)) {
+ tcnt = -EFAULT;
+ break;
+ }
+ offs += c2;
+ tcnt += c2;
+ buff += c2;
+ count -= c2;
+ *ppos += c2;
+ }
+ kfree(tbuf);
+ return tcnt;
+ }
+
+ if (!fh->rhp) {
+ ret = pvr2_v4l2_iosetup(fh);
+ if (ret) {
+ return ret;
+ }
+ }
+
+ for (;;) {
+ ret = pvr2_ioread_read(fh->rhp,buff,count);
+ if (ret >= 0) break;
+ if (ret != -EAGAIN) break;
+ if (file->f_flags & O_NONBLOCK) break;
+ /* Doing blocking I/O. Wait here. */
+ ret = wait_event_interruptible(
+ fh->wait_data,
+ pvr2_ioread_avail(fh->rhp) >= 0);
+ if (ret < 0) break;
+ }
+
+ return ret;
+}
+
+
+static unsigned int pvr2_v4l2_poll(struct file *file, poll_table *wait)
+{
+ unsigned int mask = 0;
+ struct pvr2_v4l2_fh *fh = file->private_data;
+ int ret;
+
+ if (fh->fw_mode_flag) {
+ mask |= POLLIN | POLLRDNORM;
+ return mask;
+ }
+
+ if (!fh->rhp) {
+ ret = pvr2_v4l2_iosetup(fh);
+ if (ret) return POLLERR;
+ }
+
+ poll_wait(file,&fh->wait_data,wait);
+
+ if (pvr2_ioread_avail(fh->rhp) >= 0) {
+ mask |= POLLIN | POLLRDNORM;
+ }
+
+ return mask;
+}
+
+
+static struct file_operations vdev_fops = {
+ .owner = THIS_MODULE,
+ .open = pvr2_v4l2_open,
+ .release = pvr2_v4l2_release,
+ .read = pvr2_v4l2_read,
+ .ioctl = pvr2_v4l2_ioctl,
+ .llseek = no_llseek,
+ .poll = pvr2_v4l2_poll,
+};
+
+
+#define VID_HARDWARE_PVRUSB2 38 /* FIXME : need a good value */
+
+static struct video_device vdev_template = {
+ .owner = THIS_MODULE,
+ .type = VID_TYPE_CAPTURE | VID_TYPE_TUNER,
+ .type2 = (V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VBI_CAPTURE
+ | V4L2_CAP_TUNER | V4L2_CAP_AUDIO
+ | V4L2_CAP_READWRITE),
+ .hardware = VID_HARDWARE_PVRUSB2,
+ .fops = &vdev_fops,
+};
+
+
+static void pvr2_v4l2_dev_init(struct pvr2_v4l2_dev *dip,
+ struct pvr2_v4l2 *vp,
+ enum pvr2_config cfg)
+{
+ int mindevnum;
+ int unit_number;
+ int v4l_type;
+ dip->v4lp = vp;
+ dip->config = cfg;
+
+
+ switch (cfg) {
+ case pvr2_config_mpeg:
+ v4l_type = VFL_TYPE_GRABBER;
+ dip->stream = &vp->channel.mc_head->video_stream;
+ break;
+ case pvr2_config_vbi:
+ v4l_type = VFL_TYPE_VBI;
+ break;
+ case pvr2_config_radio:
+ v4l_type = VFL_TYPE_RADIO;
+ break;
+ default:
+ /* Bail out (this should be impossible) */
+ err("Failed to set up pvrusb2 v4l dev"
+ " due to unrecognized config");
+ return;
+ }
+
+ if (!dip->stream) {
+ err("Failed to set up pvrusb2 v4l dev"
+ " due to missing stream instance");
+ return;
+ }
+
+ dip->vdev = video_device_alloc();
+ if (!dip->vdev) {
+ err("Alloc of pvrusb2 v4l video device failed");
+ return;
+ }
+
+ memcpy(dip->vdev,&vdev_template,sizeof(vdev_template));
+ dip->vdev->release = video_device_release;
+ mutex_lock(&device_lock);
+
+ mindevnum = -1;
+ unit_number = pvr2_hdw_get_unit_number(vp->channel.mc_head->hdw);
+ if ((unit_number >= 0) && (unit_number < PVR_NUM)) {
+ mindevnum = video_nr[unit_number];
+ }
+ if ((video_register_device(dip->vdev, v4l_type, mindevnum) < 0) &&
+ (video_register_device(dip->vdev, v4l_type, -1) < 0)) {
+ err("Failed to register pvrusb2 v4l video device");
+ } else {
+ pvr2_trace(PVR2_TRACE_INIT,
+ "registered device video%d [%s]",
+ dip->vdev->minor,pvr2_config_get_name(dip->config));
+ }
+
+ if ((dip->vdev->minor < sizeof(devices)/sizeof(devices[0])) &&
+ (devices[dip->vdev->minor] == NULL)) {
+ dip->ctxt_idx = dip->vdev->minor;
+ devices[dip->ctxt_idx] = dip;
+ }
+ mutex_unlock(&device_lock);
+
+ pvr2_hdw_v4l_store_minor_number(vp->channel.mc_head->hdw,
+ dip->vdev->minor);
+}
+
+
+struct pvr2_v4l2 *pvr2_v4l2_create(struct pvr2_context *mnp)
+{
+ struct pvr2_v4l2 *vp;
+
+ vp = kmalloc(sizeof(*vp),GFP_KERNEL);
+ if (!vp) return vp;
+ memset(vp,0,sizeof(*vp));
+ vp->video_dev.ctxt_idx = -1;
+ pvr2_channel_init(&vp->channel,mnp);
+ pvr2_trace(PVR2_TRACE_STRUCT,"Creating pvr2_v4l2 id=%p",vp);
+
+ vp->channel.check_func = pvr2_v4l2_internal_check;
+
+ /* register streams */
+ pvr2_v4l2_dev_init(&vp->video_dev,vp,pvr2_config_mpeg);
+
+
+ return vp;
+}
+
+/*
+ Stuff for Emacs to see, in order to encourage consistent editing style:
+ *** Local Variables: ***
+ *** mode: c ***
+ *** fill-column: 75 ***
+ *** tab-width: 8 ***
+ *** c-basic-offset: 8 ***
+ *** End: ***
+ */