diff options
Diffstat (limited to 'drivers/media/video/pvrusb2/pvrusb2-v4l2.c')
| -rw-r--r-- | drivers/media/video/pvrusb2/pvrusb2-v4l2.c | 1056 |
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: *** + */ |