diff options
Diffstat (limited to 'drivers/media/dvb/dvb-core/dmxdev.c')
| -rw-r--r-- | drivers/media/dvb/dvb-core/dmxdev.c | 1137 |
1 files changed, 1137 insertions, 0 deletions
diff --git a/drivers/media/dvb/dvb-core/dmxdev.c b/drivers/media/dvb/dvb-core/dmxdev.c new file mode 100644 index 000000000000..1863f1dfb00c --- /dev/null +++ b/drivers/media/dvb/dvb-core/dmxdev.c @@ -0,0 +1,1137 @@ +/* + * dmxdev.c - DVB demultiplexer device + * + * Copyright (C) 2000 Ralph Metzler <ralph@convergence.de> + * & Marcus Metzler <marcus@convergence.de> + for convergence integrated media GmbH + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * as published by the Free Software Foundation; either version 2.1 + * 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. + * + * You should have received a copy of the GNU Lesser 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/spinlock.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/sched.h> +#include <linux/poll.h> +#include <linux/ioctl.h> +#include <linux/wait.h> +#include <asm/uaccess.h> +#include <asm/system.h> + +#include "dmxdev.h" + +static int debug; + +module_param(debug, int, 0644); +MODULE_PARM_DESC(debug, "Turn on/off debugging (default:off)."); + +#define dprintk if (debug) printk + +static inline struct dmxdev_filter * +dvb_dmxdev_file_to_filter(struct file *file) +{ + return (struct dmxdev_filter *) file->private_data; +} + +static inline void dvb_dmxdev_buffer_init(struct dmxdev_buffer *buffer) +{ + buffer->data=NULL; + buffer->size=8192; + buffer->pread=0; + buffer->pwrite=0; + buffer->error=0; + init_waitqueue_head(&buffer->queue); +} + +static inline int dvb_dmxdev_buffer_write(struct dmxdev_buffer *buf, const u8 *src, int len) +{ + int split; + int free; + int todo; + + if (!len) + return 0; + if (!buf->data) + return 0; + + free=buf->pread-buf->pwrite; + split=0; + if (free<=0) { + free+=buf->size; + split=buf->size-buf->pwrite; + } + if (len>=free) { + dprintk("dmxdev: buffer overflow\n"); + return -1; + } + if (split>=len) + split=0; + todo=len; + if (split) { + memcpy(buf->data + buf->pwrite, src, split); + todo-=split; + buf->pwrite=0; + } + memcpy(buf->data + buf->pwrite, src+split, todo); + buf->pwrite=(buf->pwrite+todo)%buf->size; + return len; +} + +static ssize_t dvb_dmxdev_buffer_read(struct dmxdev_buffer *src, + int non_blocking, char __user *buf, size_t count, loff_t *ppos) +{ + unsigned long todo=count; + int split, avail, error; + + if (!src->data) + return 0; + + if ((error=src->error)) { + src->pwrite=src->pread; + src->error=0; + return error; + } + + if (non_blocking && (src->pwrite==src->pread)) + return -EWOULDBLOCK; + + while (todo>0) { + if (non_blocking && (src->pwrite==src->pread)) + return (count-todo) ? (count-todo) : -EWOULDBLOCK; + + if (wait_event_interruptible(src->queue, + (src->pread!=src->pwrite) || + (src->error))<0) + return count-todo; + + if ((error=src->error)) { + src->pwrite=src->pread; + src->error=0; + return error; + } + + split=src->size; + avail=src->pwrite - src->pread; + if (avail<0) { + avail+=src->size; + split=src->size - src->pread; + } + if (avail>todo) + avail=todo; + if (split<avail) { + if (copy_to_user(buf, src->data+src->pread, split)) + return -EFAULT; + buf+=split; + src->pread=0; + todo-=split; + avail-=split; + } + if (avail) { + if (copy_to_user(buf, src->data+src->pread, avail)) + return -EFAULT; + src->pread = (src->pread + avail) % src->size; + todo-=avail; + buf+=avail; + } + } + return count; +} + +static struct dmx_frontend * get_fe(struct dmx_demux *demux, int type) +{ + struct list_head *head, *pos; + + head=demux->get_frontends(demux); + if (!head) + return NULL; + list_for_each(pos, head) + if (DMX_FE_ENTRY(pos)->source==type) + return DMX_FE_ENTRY(pos); + + return NULL; +} + +static inline void dvb_dmxdev_dvr_state_set(struct dmxdev_dvr *dmxdevdvr, int state) +{ + spin_lock_irq(&dmxdevdvr->dev->lock); + dmxdevdvr->state=state; + spin_unlock_irq(&dmxdevdvr->dev->lock); +} + +static int dvb_dvr_open(struct inode *inode, struct file *file) +{ + struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; + struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; + struct dmx_frontend *front; + + dprintk ("function : %s\n", __FUNCTION__); + + if (down_interruptible (&dmxdev->mutex)) + return -ERESTARTSYS; + + if ((file->f_flags&O_ACCMODE)==O_RDWR) { + if (!(dmxdev->capabilities&DMXDEV_CAP_DUPLEX)) { + up(&dmxdev->mutex); + return -EOPNOTSUPP; + } + } + + if ((file->f_flags&O_ACCMODE)==O_RDONLY) { + dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer); + dmxdev->dvr_buffer.size=DVR_BUFFER_SIZE; + dmxdev->dvr_buffer.data=vmalloc(DVR_BUFFER_SIZE); + if (!dmxdev->dvr_buffer.data) { + up(&dmxdev->mutex); + return -ENOMEM; + } + } + + if ((file->f_flags&O_ACCMODE)==O_WRONLY) { + dmxdev->dvr_orig_fe=dmxdev->demux->frontend; + + if (!dmxdev->demux->write) { + up(&dmxdev->mutex); + return -EOPNOTSUPP; + } + + front=get_fe(dmxdev->demux, DMX_MEMORY_FE); + + if (!front) { + up(&dmxdev->mutex); + return -EINVAL; + } + dmxdev->demux->disconnect_frontend(dmxdev->demux); + dmxdev->demux->connect_frontend(dmxdev->demux, front); + } + up(&dmxdev->mutex); + return 0; +} + +static int dvb_dvr_release(struct inode *inode, struct file *file) +{ + struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; + struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; + + if (down_interruptible (&dmxdev->mutex)) + return -ERESTARTSYS; + + if ((file->f_flags&O_ACCMODE)==O_WRONLY) { + dmxdev->demux->disconnect_frontend(dmxdev->demux); + dmxdev->demux->connect_frontend(dmxdev->demux, + dmxdev->dvr_orig_fe); + } + if ((file->f_flags&O_ACCMODE)==O_RDONLY) { + if (dmxdev->dvr_buffer.data) { + void *mem=dmxdev->dvr_buffer.data; + mb(); + spin_lock_irq(&dmxdev->lock); + dmxdev->dvr_buffer.data=NULL; + spin_unlock_irq(&dmxdev->lock); + vfree(mem); + } + } + up(&dmxdev->mutex); + return 0; +} + +static ssize_t dvb_dvr_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; + struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; + int ret; + + if (!dmxdev->demux->write) + return -EOPNOTSUPP; + if ((file->f_flags&O_ACCMODE)!=O_WRONLY) + return -EINVAL; + if (down_interruptible (&dmxdev->mutex)) + return -ERESTARTSYS; + ret=dmxdev->demux->write(dmxdev->demux, buf, count); + up(&dmxdev->mutex); + return ret; +} + +static ssize_t dvb_dvr_read(struct file *file, char __user *buf, size_t count, + loff_t *ppos) +{ + struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; + struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; + int ret; + + //down(&dmxdev->mutex); + ret= dvb_dmxdev_buffer_read(&dmxdev->dvr_buffer, + file->f_flags&O_NONBLOCK, + buf, count, ppos); + //up(&dmxdev->mutex); + return ret; +} + +static inline void dvb_dmxdev_filter_state_set(struct dmxdev_filter *dmxdevfilter, int state) +{ + spin_lock_irq(&dmxdevfilter->dev->lock); + dmxdevfilter->state=state; + spin_unlock_irq(&dmxdevfilter->dev->lock); +} + +static int dvb_dmxdev_set_buffer_size(struct dmxdev_filter *dmxdevfilter, unsigned long size) +{ + struct dmxdev_buffer *buf=&dmxdevfilter->buffer; + void *mem; + + if (buf->size==size) + return 0; + if (dmxdevfilter->state>=DMXDEV_STATE_GO) + return -EBUSY; + spin_lock_irq(&dmxdevfilter->dev->lock); + mem=buf->data; + buf->data=NULL; + buf->size=size; + buf->pwrite=buf->pread=0; + spin_unlock_irq(&dmxdevfilter->dev->lock); + vfree(mem); + + if (buf->size) { + mem=vmalloc(dmxdevfilter->buffer.size); + if (!mem) + return -ENOMEM; + spin_lock_irq(&dmxdevfilter->dev->lock); + buf->data=mem; + spin_unlock_irq(&dmxdevfilter->dev->lock); + } + return 0; +} + +static void dvb_dmxdev_filter_timeout(unsigned long data) +{ + struct dmxdev_filter *dmxdevfilter=(struct dmxdev_filter *)data; + + dmxdevfilter->buffer.error=-ETIMEDOUT; + spin_lock_irq(&dmxdevfilter->dev->lock); + dmxdevfilter->state=DMXDEV_STATE_TIMEDOUT; + spin_unlock_irq(&dmxdevfilter->dev->lock); + wake_up(&dmxdevfilter->buffer.queue); +} + +static void dvb_dmxdev_filter_timer(struct dmxdev_filter *dmxdevfilter) +{ + struct dmx_sct_filter_params *para=&dmxdevfilter->params.sec; + + del_timer(&dmxdevfilter->timer); + if (para->timeout) { + dmxdevfilter->timer.function=dvb_dmxdev_filter_timeout; + dmxdevfilter->timer.data=(unsigned long) dmxdevfilter; + dmxdevfilter->timer.expires=jiffies+1+(HZ/2+HZ*para->timeout)/1000; + add_timer(&dmxdevfilter->timer); + } +} + +static int dvb_dmxdev_section_callback(const u8 *buffer1, size_t buffer1_len, + const u8 *buffer2, size_t buffer2_len, + struct dmx_section_filter *filter, enum dmx_success success) +{ + struct dmxdev_filter *dmxdevfilter=(struct dmxdev_filter *) filter->priv; + int ret; + + if (dmxdevfilter->buffer.error) { + wake_up(&dmxdevfilter->buffer.queue); + return 0; + } + spin_lock(&dmxdevfilter->dev->lock); + if (dmxdevfilter->state!=DMXDEV_STATE_GO) { + spin_unlock(&dmxdevfilter->dev->lock); + return 0; + } + del_timer(&dmxdevfilter->timer); + dprintk("dmxdev: section callback %02x %02x %02x %02x %02x %02x\n", + buffer1[0], buffer1[1], + buffer1[2], buffer1[3], + buffer1[4], buffer1[5]); + ret=dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer1, buffer1_len); + if (ret==buffer1_len) { + ret=dvb_dmxdev_buffer_write(&dmxdevfilter->buffer, buffer2, buffer2_len); + } + if (ret<0) { + dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread; + dmxdevfilter->buffer.error=-EOVERFLOW; + } + if (dmxdevfilter->params.sec.flags&DMX_ONESHOT) + dmxdevfilter->state=DMXDEV_STATE_DONE; + spin_unlock(&dmxdevfilter->dev->lock); + wake_up(&dmxdevfilter->buffer.queue); + return 0; +} + +static int dvb_dmxdev_ts_callback(const u8 *buffer1, size_t buffer1_len, + const u8 *buffer2, size_t buffer2_len, + struct dmx_ts_feed *feed, enum dmx_success success) +{ + struct dmxdev_filter *dmxdevfilter=(struct dmxdev_filter *) feed->priv; + struct dmxdev_buffer *buffer; + int ret; + + spin_lock(&dmxdevfilter->dev->lock); + if (dmxdevfilter->params.pes.output==DMX_OUT_DECODER) { + spin_unlock(&dmxdevfilter->dev->lock); + return 0; + } + + if (dmxdevfilter->params.pes.output==DMX_OUT_TAP) + buffer=&dmxdevfilter->buffer; + else + buffer=&dmxdevfilter->dev->dvr_buffer; + if (buffer->error) { + spin_unlock(&dmxdevfilter->dev->lock); + wake_up(&buffer->queue); + return 0; + } + ret=dvb_dmxdev_buffer_write(buffer, buffer1, buffer1_len); + if (ret==buffer1_len) + ret=dvb_dmxdev_buffer_write(buffer, buffer2, buffer2_len); + if (ret<0) { + buffer->pwrite=buffer->pread; + buffer->error=-EOVERFLOW; + } + spin_unlock(&dmxdevfilter->dev->lock); + wake_up(&buffer->queue); + return 0; +} + + +/* stop feed but only mark the specified filter as stopped (state set) */ + +static int dvb_dmxdev_feed_stop(struct dmxdev_filter *dmxdevfilter) +{ + dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); + + switch (dmxdevfilter->type) { + case DMXDEV_TYPE_SEC: + del_timer(&dmxdevfilter->timer); + dmxdevfilter->feed.sec->stop_filtering(dmxdevfilter->feed.sec); + break; + case DMXDEV_TYPE_PES: + dmxdevfilter->feed.ts->stop_filtering(dmxdevfilter->feed.ts); + break; + default: + return -EINVAL; + } + return 0; +} + + +/* start feed associated with the specified filter */ + +static int dvb_dmxdev_feed_start(struct dmxdev_filter *filter) +{ + dvb_dmxdev_filter_state_set (filter, DMXDEV_STATE_GO); + + switch (filter->type) { + case DMXDEV_TYPE_SEC: + return filter->feed.sec->start_filtering(filter->feed.sec); + break; + case DMXDEV_TYPE_PES: + return filter->feed.ts->start_filtering(filter->feed.ts); + break; + default: + return -EINVAL; + } + + return 0; +} + + +/* restart section feed if it has filters left associated with it, + otherwise release the feed */ + +static int dvb_dmxdev_feed_restart(struct dmxdev_filter *filter) +{ + int i; + struct dmxdev *dmxdev = filter->dev; + u16 pid = filter->params.sec.pid; + + for (i=0; i<dmxdev->filternum; i++) + if (dmxdev->filter[i].state>=DMXDEV_STATE_GO && + dmxdev->filter[i].type==DMXDEV_TYPE_SEC && + dmxdev->filter[i].pid==pid) { + dvb_dmxdev_feed_start(&dmxdev->filter[i]); + return 0; + } + + filter->dev->demux->release_section_feed(dmxdev->demux, filter->feed.sec); + + return 0; +} + +static int dvb_dmxdev_filter_stop(struct dmxdev_filter *dmxdevfilter) +{ + if (dmxdevfilter->state<DMXDEV_STATE_GO) + return 0; + + switch (dmxdevfilter->type) { + case DMXDEV_TYPE_SEC: + if (!dmxdevfilter->feed.sec) + break; + dvb_dmxdev_feed_stop(dmxdevfilter); + if (dmxdevfilter->filter.sec) + dmxdevfilter->feed.sec-> + release_filter(dmxdevfilter->feed.sec, + dmxdevfilter->filter.sec); + dvb_dmxdev_feed_restart(dmxdevfilter); + dmxdevfilter->feed.sec=NULL; + break; + case DMXDEV_TYPE_PES: + if (!dmxdevfilter->feed.ts) + break; + dvb_dmxdev_feed_stop(dmxdevfilter); + dmxdevfilter->dev->demux-> + release_ts_feed(dmxdevfilter->dev->demux, + dmxdevfilter->feed.ts); + dmxdevfilter->feed.ts=NULL; + break; + default: + if (dmxdevfilter->state==DMXDEV_STATE_ALLOCATED) + return 0; + return -EINVAL; + } + dmxdevfilter->buffer.pwrite=dmxdevfilter->buffer.pread=0; + return 0; +} + +static inline int dvb_dmxdev_filter_reset(struct dmxdev_filter *dmxdevfilter) +{ + if (dmxdevfilter->state<DMXDEV_STATE_SET) + return 0; + + dmxdevfilter->type=DMXDEV_TYPE_NONE; + dmxdevfilter->pid=0xffff; + dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); + return 0; +} + +static int dvb_dmxdev_filter_start(struct dmxdev_filter *filter) +{ + struct dmxdev *dmxdev = filter->dev; + void *mem; + int ret, i; + + if (filter->state < DMXDEV_STATE_SET) + return -EINVAL; + + if (filter->state >= DMXDEV_STATE_GO) + dvb_dmxdev_filter_stop(filter); + + if (!(mem = filter->buffer.data)) { + mem = vmalloc(filter->buffer.size); + spin_lock_irq(&filter->dev->lock); + filter->buffer.data=mem; + spin_unlock_irq(&filter->dev->lock); + if (!filter->buffer.data) + return -ENOMEM; + } + + filter->buffer.pwrite = filter->buffer.pread = 0; + + switch (filter->type) { + case DMXDEV_TYPE_SEC: + { + struct dmx_sct_filter_params *para=&filter->params.sec; + struct dmx_section_filter **secfilter=&filter->filter.sec; + struct dmx_section_feed **secfeed=&filter->feed.sec; + + *secfilter=NULL; + *secfeed=NULL; + + /* find active filter/feed with same PID */ + for (i=0; i<dmxdev->filternum; i++) { + if (dmxdev->filter[i].state >= DMXDEV_STATE_GO && + dmxdev->filter[i].pid == para->pid && + dmxdev->filter[i].type == DMXDEV_TYPE_SEC) { + *secfeed = dmxdev->filter[i].feed.sec; + break; + } + } + + /* if no feed found, try to allocate new one */ + if (!*secfeed) { + ret=dmxdev->demux->allocate_section_feed(dmxdev->demux, + secfeed, + dvb_dmxdev_section_callback); + if (ret<0) { + printk ("DVB (%s): could not alloc feed\n", + __FUNCTION__); + return ret; + } + + ret=(*secfeed)->set(*secfeed, para->pid, 32768, 0, + (para->flags & DMX_CHECK_CRC) ? 1 : 0); + + if (ret<0) { + printk ("DVB (%s): could not set feed\n", + __FUNCTION__); + dvb_dmxdev_feed_restart(filter); + return ret; + } + } else { + dvb_dmxdev_feed_stop(filter); + } + + ret=(*secfeed)->allocate_filter(*secfeed, secfilter); + + if (ret < 0) { + dvb_dmxdev_feed_restart(filter); + filter->feed.sec->start_filtering(*secfeed); + dprintk ("could not get filter\n"); + return ret; + } + + (*secfilter)->priv = filter; + + memcpy(&((*secfilter)->filter_value[3]), + &(para->filter.filter[1]), DMX_FILTER_SIZE-1); + memcpy(&(*secfilter)->filter_mask[3], + ¶->filter.mask[1], DMX_FILTER_SIZE-1); + memcpy(&(*secfilter)->filter_mode[3], + ¶->filter.mode[1], DMX_FILTER_SIZE-1); + + (*secfilter)->filter_value[0]=para->filter.filter[0]; + (*secfilter)->filter_mask[0]=para->filter.mask[0]; + (*secfilter)->filter_mode[0]=para->filter.mode[0]; + (*secfilter)->filter_mask[1]=0; + (*secfilter)->filter_mask[2]=0; + + filter->todo = 0; + + ret = filter->feed.sec->start_filtering (filter->feed.sec); + + if (ret < 0) + return ret; + + dvb_dmxdev_filter_timer(filter); + break; + } + + case DMXDEV_TYPE_PES: + { + struct timespec timeout = { 0 }; + struct dmx_pes_filter_params *para = &filter->params.pes; + dmx_output_t otype; + int ret; + int ts_type; + enum dmx_ts_pes ts_pes; + struct dmx_ts_feed **tsfeed = &filter->feed.ts; + + filter->feed.ts = NULL; + otype=para->output; + + ts_pes=(enum dmx_ts_pes) para->pes_type; + + if (ts_pes<DMX_PES_OTHER) + ts_type=TS_DECODER; + else + ts_type=0; + + if (otype == DMX_OUT_TS_TAP) + ts_type |= TS_PACKET; + + if (otype == DMX_OUT_TAP) + ts_type |= TS_PAYLOAD_ONLY|TS_PACKET; + + ret=dmxdev->demux->allocate_ts_feed(dmxdev->demux, + tsfeed, + dvb_dmxdev_ts_callback); + if (ret<0) + return ret; + + (*tsfeed)->priv = (void *) filter; + + ret = (*tsfeed)->set(*tsfeed, para->pid, ts_type, ts_pes, + 188, 32768, 0, timeout); + + if (ret < 0) { + dmxdev->demux->release_ts_feed(dmxdev->demux, *tsfeed); + return ret; + } + + ret = filter->feed.ts->start_filtering(filter->feed.ts); + + if (ret < 0) + return ret; + + break; + } + default: + return -EINVAL; + } + + dvb_dmxdev_filter_state_set(filter, DMXDEV_STATE_GO); + return 0; +} + +static int dvb_demux_open(struct inode *inode, struct file *file) +{ + struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; + struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; + int i; + struct dmxdev_filter *dmxdevfilter; + + if (!dmxdev->filter) + return -EINVAL; + + if (down_interruptible(&dmxdev->mutex)) + return -ERESTARTSYS; + + for (i=0; i<dmxdev->filternum; i++) + if (dmxdev->filter[i].state==DMXDEV_STATE_FREE) + break; + + if (i==dmxdev->filternum) { + up(&dmxdev->mutex); + return -EMFILE; + } + + dmxdevfilter=&dmxdev->filter[i]; + sema_init(&dmxdevfilter->mutex, 1); + dmxdevfilter->dvbdev=dmxdev->dvbdev; + file->private_data=dmxdevfilter; + + dvb_dmxdev_buffer_init(&dmxdevfilter->buffer); + dmxdevfilter->type=DMXDEV_TYPE_NONE; + dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_ALLOCATED); + dmxdevfilter->feed.ts=NULL; + init_timer(&dmxdevfilter->timer); + + up(&dmxdev->mutex); + return 0; +} + + +static int dvb_dmxdev_filter_free(struct dmxdev *dmxdev, struct dmxdev_filter *dmxdevfilter) +{ + if (down_interruptible(&dmxdev->mutex)) + return -ERESTARTSYS; + + if (down_interruptible(&dmxdevfilter->mutex)) { + up(&dmxdev->mutex); + return -ERESTARTSYS; + } + + dvb_dmxdev_filter_stop(dmxdevfilter); + dvb_dmxdev_filter_reset(dmxdevfilter); + + if (dmxdevfilter->buffer.data) { + void *mem=dmxdevfilter->buffer.data; + + spin_lock_irq(&dmxdev->lock); + dmxdevfilter->buffer.data=NULL; + spin_unlock_irq(&dmxdev->lock); + vfree(mem); + } + + dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_FREE); + wake_up(&dmxdevfilter->buffer.queue); + up(&dmxdevfilter->mutex); + up(&dmxdev->mutex); + return 0; +} + +static inline void invert_mode(dmx_filter_t *filter) +{ + int i; + + for (i=0; i<DMX_FILTER_SIZE; i++) + filter->mode[i]^=0xff; +} + + +static int dvb_dmxdev_filter_set(struct dmxdev *dmxdev, + struct dmxdev_filter *dmxdevfilter, + struct dmx_sct_filter_params *params) +{ + dprintk ("function : %s\n", __FUNCTION__); + + dvb_dmxdev_filter_stop(dmxdevfilter); + + dmxdevfilter->type=DMXDEV_TYPE_SEC; + dmxdevfilter->pid=params->pid; + memcpy(&dmxdevfilter->params.sec, + params, sizeof(struct dmx_sct_filter_params)); + invert_mode(&dmxdevfilter->params.sec.filter); + dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); + + if (params->flags&DMX_IMMEDIATE_START) + return dvb_dmxdev_filter_start(dmxdevfilter); + + return 0; +} + +static int dvb_dmxdev_pes_filter_set(struct dmxdev *dmxdev, + struct dmxdev_filter *dmxdevfilter, + struct dmx_pes_filter_params *params) +{ + dvb_dmxdev_filter_stop(dmxdevfilter); + + if (params->pes_type>DMX_PES_OTHER || params->pes_type<0) + return -EINVAL; + + dmxdevfilter->type=DMXDEV_TYPE_PES; + dmxdevfilter->pid=params->pid; + memcpy(&dmxdevfilter->params, params, sizeof(struct dmx_pes_filter_params)); + + dvb_dmxdev_filter_state_set(dmxdevfilter, DMXDEV_STATE_SET); + + if (params->flags&DMX_IMMEDIATE_START) + return dvb_dmxdev_filter_start(dmxdevfilter); + + return 0; +} + +static ssize_t dvb_dmxdev_read_sec(struct dmxdev_filter *dfil, + struct file *file, char __user *buf, size_t count, loff_t *ppos) +{ + int result, hcount; + int done=0; + + if (dfil->todo<=0) { + hcount=3+dfil->todo; + if (hcount>count) + hcount=count; + result=dvb_dmxdev_buffer_read(&dfil->buffer, file->f_flags&O_NONBLOCK, + buf, hcount, ppos); + if (result<0) { + dfil->todo=0; + return result; + } + if (copy_from_user(dfil->secheader-dfil->todo, buf, result)) + return -EFAULT; + buf+=result; + done=result; + count-=result; + dfil->todo-=result; + if (dfil->todo>-3) + return done; + dfil->todo=((dfil->secheader[1]<<8)|dfil->secheader[2])&0xfff; + if (!count) + return done; + } + if (count>dfil->todo) + count=dfil->todo; + result=dvb_dmxdev_buffer_read(&dfil->buffer, file->f_flags&O_NONBLOCK, + buf, count, ppos); + if (result<0) + return result; + dfil->todo-=result; + return (result+done); +} + + +static ssize_t +dvb_demux_read(struct file *file, char __user *buf, size_t count, loff_t *ppos) +{ + struct dmxdev_filter *dmxdevfilter=dvb_dmxdev_file_to_filter(file); + int ret=0; + + if (down_interruptible(&dmxdevfilter->mutex)) + return -ERESTARTSYS; + + if (dmxdevfilter->type==DMXDEV_TYPE_SEC) + ret=dvb_dmxdev_read_sec(dmxdevfilter, file, buf, count, ppos); + else + ret=dvb_dmxdev_buffer_read(&dmxdevfilter->buffer, + file->f_flags&O_NONBLOCK, + buf, count, ppos); + + up(&dmxdevfilter->mutex); + return ret; +} + + +static int dvb_demux_do_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, void *parg) +{ + struct dmxdev_filter *dmxdevfilter=dvb_dmxdev_file_to_filter(file); + struct dmxdev *dmxdev=dmxdevfilter->dev; + unsigned long arg=(unsigned long) parg; + int ret=0; + + if (down_interruptible (&dmxdev->mutex)) + return -ERESTARTSYS; + + switch (cmd) { + case DMX_START: + if (down_interruptible(&dmxdevfilter->mutex)) { + up(&dmxdev->mutex); + return -ERESTARTSYS; + } + if (dmxdevfilter->state<DMXDEV_STATE_SET) + ret = -EINVAL; + else + ret = dvb_dmxdev_filter_start(dmxdevfilter); + up(&dmxdevfilter->mutex); + break; + + case DMX_STOP: + if (down_interruptible(&dmxdevfilter->mutex)) { + up(&dmxdev->mutex); + return -ERESTARTSYS; + } + ret=dvb_dmxdev_filter_stop(dmxdevfilter); + up(&dmxdevfilter->mutex); + break; + + case DMX_SET_FILTER: + if (down_interruptible(&dmxdevfilter->mutex)) { + up(&dmxdev->mutex); + return -ERESTARTSYS; + } + ret = dvb_dmxdev_filter_set(dmxdev, dmxdevfilter, + (struct dmx_sct_filter_params *)parg); + up(&dmxdevfilter->mutex); + break; + + case DMX_SET_PES_FILTER: + if (down_interruptible(&dmxdevfilter->mutex)) { + up(&dmxdev->mutex); + return -ERESTARTSYS; + } + ret=dvb_dmxdev_pes_filter_set(dmxdev, dmxdevfilter, + (struct dmx_pes_filter_params *)parg); + up(&dmxdevfilter->mutex); + break; + + case DMX_SET_BUFFER_SIZE: + if (down_interruptible(&dmxdevfilter->mutex)) { + up(&dmxdev->mutex); + return -ERESTARTSYS; + } + ret=dvb_dmxdev_set_buffer_size(dmxdevfilter, arg); + up(&dmxdevfilter->mutex); + break; + + case DMX_GET_EVENT: + break; + + case DMX_GET_PES_PIDS: + if (!dmxdev->demux->get_pes_pids) { + ret=-EINVAL; + break; + } + dmxdev->demux->get_pes_pids(dmxdev->demux, (u16 *)parg); + break; + + case DMX_GET_STC: + if (!dmxdev->demux->get_stc) { + ret=-EINVAL; + break; + } + ret = dmxdev->demux->get_stc(dmxdev->demux, + ((struct dmx_stc *)parg)->num, + &((struct dmx_stc *)parg)->stc, + &((struct dmx_stc *)parg)->base); + break; + + default: + ret=-EINVAL; + } + up(&dmxdev->mutex); + return ret; +} + +static int dvb_demux_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + return dvb_usercopy(inode, file, cmd, arg, dvb_demux_do_ioctl); +} + + +static unsigned int dvb_demux_poll (struct file *file, poll_table *wait) +{ + struct dmxdev_filter *dmxdevfilter = dvb_dmxdev_file_to_filter(file); + unsigned int mask = 0; + + if (!dmxdevfilter) + return -EINVAL; + + poll_wait(file, &dmxdevfilter->buffer.queue, wait); + + if (dmxdevfilter->state != DMXDEV_STATE_GO && + dmxdevfilter->state != DMXDEV_STATE_DONE && + dmxdevfilter->state != DMXDEV_STATE_TIMEDOUT) + return 0; + + if (dmxdevfilter->buffer.error) + mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR); + + if (dmxdevfilter->buffer.pread != dmxdevfilter->buffer.pwrite) + mask |= (POLLIN | POLLRDNORM | POLLPRI); + + return mask; +} + + +static int dvb_demux_release(struct inode *inode, struct file *file) +{ + struct dmxdev_filter *dmxdevfilter = dvb_dmxdev_file_to_filter(file); + struct dmxdev *dmxdev = dmxdevfilter->dev; + + return dvb_dmxdev_filter_free(dmxdev, dmxdevfilter); +} + + +static struct file_operations dvb_demux_fops = { + .owner = THIS_MODULE, + .read = dvb_demux_read, + .ioctl = dvb_demux_ioctl, + .open = dvb_demux_open, + .release = dvb_demux_release, + .poll = dvb_demux_poll, +}; + + +static struct dvb_device dvbdev_demux = { + .priv = NULL, + .users = 1, + .writers = 1, + .fops = &dvb_demux_fops +}; + + +static int dvb_dvr_do_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, void *parg) +{ + struct dvb_device *dvbdev=(struct dvb_device *) file->private_data; + struct dmxdev *dmxdev=(struct dmxdev *) dvbdev->priv; + + int ret=0; + + if (down_interruptible (&dmxdev->mutex)) + return -ERESTARTSYS; + + switch (cmd) { + case DMX_SET_BUFFER_SIZE: + // FIXME: implement + ret=0; + break; + + default: + ret=-EINVAL; + } + up(&dmxdev->mutex); + return ret; +} + + +static int dvb_dvr_ioctl(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg) +{ + return dvb_usercopy(inode, file, cmd, arg, dvb_dvr_do_ioctl); +} + + +static unsigned int dvb_dvr_poll (struct file *file, poll_table *wait) +{ + struct dvb_device *dvbdev = (struct dvb_device *) file->private_data; + struct dmxdev *dmxdev = (struct dmxdev *) dvbdev->priv; + unsigned int mask = 0; + + dprintk ("function : %s\n", __FUNCTION__); + + poll_wait(file, &dmxdev->dvr_buffer.queue, wait); + + if ((file->f_flags&O_ACCMODE) == O_RDONLY) { + if (dmxdev->dvr_buffer.error) + mask |= (POLLIN | POLLRDNORM | POLLPRI | POLLERR); + + if (dmxdev->dvr_buffer.pread!=dmxdev->dvr_buffer.pwrite) + mask |= (POLLIN | POLLRDNORM | POLLPRI); + } else + mask |= (POLLOUT | POLLWRNORM | POLLPRI); + + return mask; +} + + +static struct file_operations dvb_dvr_fops = { + .owner = THIS_MODULE, + .read = dvb_dvr_read, + .write = dvb_dvr_write, + .ioctl = dvb_dvr_ioctl, + .open = dvb_dvr_open, + .release = dvb_dvr_release, + .poll = dvb_dvr_poll, +}; + +static struct dvb_device dvbdev_dvr = { + .priv = NULL, + .users = 1, + .writers = 1, + .fops = &dvb_dvr_fops +}; + +int +dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *dvb_adapter) +{ + int i; + + if (dmxdev->demux->open(dmxdev->demux) < 0) + return -EUSERS; + + dmxdev->filter = vmalloc(dmxdev->filternum*sizeof(struct dmxdev_filter)); + if (!dmxdev->filter) + return -ENOMEM; + + dmxdev->dvr = vmalloc(dmxdev->filternum*sizeof(struct dmxdev_dvr)); + if (!dmxdev->dvr) { + vfree(dmxdev->filter); + dmxdev->filter = NULL; + return -ENOMEM; + } + + sema_init(&dmxdev->mutex, 1); + spin_lock_init(&dmxdev->lock); + for (i=0; i<dmxdev->filternum; i++) { + dmxdev->filter[i].dev=dmxdev; + dmxdev->filter[i].buffer.data=NULL; + dvb_dmxdev_filter_state_set(&dmxdev->filter[i], DMXDEV_STATE_FREE); + dmxdev->dvr[i].dev=dmxdev; + dmxdev->dvr[i].buffer.data=NULL; + dvb_dmxdev_filter_state_set(&dmxdev->filter[i], DMXDEV_STATE_FREE); + dvb_dmxdev_dvr_state_set(&dmxdev->dvr[i], DMXDEV_STATE_FREE); + } + + dvb_register_device(dvb_adapter, &dmxdev->dvbdev, &dvbdev_demux, dmxdev, DVB_DEVICE_DEMUX); + dvb_register_device(dvb_adapter, &dmxdev->dvr_dvbdev, &dvbdev_dvr, dmxdev, DVB_DEVICE_DVR); + + dvb_dmxdev_buffer_init(&dmxdev->dvr_buffer); + + return 0; +} +EXPORT_SYMBOL(dvb_dmxdev_init); + +void +dvb_dmxdev_release(struct dmxdev *dmxdev) +{ + dvb_unregister_device(dmxdev->dvbdev); + dvb_unregister_device(dmxdev->dvr_dvbdev); + + vfree(dmxdev->filter); + dmxdev->filter=NULL; + vfree(dmxdev->dvr); + dmxdev->dvr=NULL; + dmxdev->demux->close(dmxdev->demux); +} +EXPORT_SYMBOL(dvb_dmxdev_release); |