Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2)  * dmxdev.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2000 Ralph Metzler & Marcus Metzler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *                    for convergence integrated media GmbH
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  * modify it under the terms of the GNU Lesser General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9)  * as published by the Free Software Foundation; either version 2.1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10)  * of the License, or (at your option) any later version.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12)  * This program is distributed in the hope that it will be useful,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13)  * but WITHOUT ANY WARRANTY; without even the implied warranty of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14)  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15)  * GNU General Public License for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #ifndef _DMXDEV_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define _DMXDEV_H_
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include <linux/spinlock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/time.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) #include <linux/timer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #include <linux/wait.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #include <linux/fs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #include <linux/mutex.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #include <linux/dvb/dmx.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #include <media/dvbdev.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #include <media/demux.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #include <media/dvb_ringbuffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) #include <media/dvb_vb2.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41)  * enum dmxdev_type - type of demux filter type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43)  * @DMXDEV_TYPE_NONE:	no filter set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44)  * @DMXDEV_TYPE_SEC:	section filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45)  * @DMXDEV_TYPE_PES:	Program Elementary Stream (PES) filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) enum dmxdev_type {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 	DMXDEV_TYPE_NONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 	DMXDEV_TYPE_SEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	DMXDEV_TYPE_PES,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54)  * enum dmxdev_state - state machine for the dmxdev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56)  * @DMXDEV_STATE_FREE:		indicates that the filter is freed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57)  * @DMXDEV_STATE_ALLOCATED:	indicates that the filter was allocated
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58)  *				to be used.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59)  * @DMXDEV_STATE_SET:		indicates that the filter parameters are set.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60)  * @DMXDEV_STATE_GO:		indicates that the filter is running.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61)  * @DMXDEV_STATE_DONE:		indicates that a packet was already filtered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62)  *				and the filter is now disabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63)  *				Set only if %DMX_ONESHOT. See
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64)  *				&dmx_sct_filter_params.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65)  * @DMXDEV_STATE_TIMEDOUT:	Indicates a timeout condition.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) enum dmxdev_state {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	DMXDEV_STATE_FREE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	DMXDEV_STATE_ALLOCATED,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	DMXDEV_STATE_SET,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	DMXDEV_STATE_GO,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	DMXDEV_STATE_DONE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	DMXDEV_STATE_TIMEDOUT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77)  * struct dmxdev_feed - digital TV dmxdev feed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79)  * @pid:	Program ID to be filtered
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80)  * @ts:		pointer to &struct dmx_ts_feed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81)  * @next:	&struct list_head pointing to the next feed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) struct dmxdev_feed {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	u16 pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	struct dmx_ts_feed *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	struct list_head next;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91)  * struct dmxdev_filter - digital TV dmxdev filter
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93)  * @filter:	a union describing a dmxdev filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94)  *		Currently used only for section filters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95)  * @filter.sec: a &struct dmx_section_filter pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96)  *		For section filter only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97)  * @feed:	a union describing a dmxdev feed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98)  *		Depending on the filter type, it can be either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99)  *		@feed.ts or @feed.sec.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)  * @feed.ts:	a &struct list_head list.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)  *		For TS and PES feeds.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102)  * @feed.sec:	a &struct dmx_section_feed pointer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)  *		For section feed only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)  * @params:	a union describing dmxdev filter parameters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)  *		Depending on the filter type, it can be either
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)  *		@params.sec or @params.pes.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)  * @params.sec:	a &struct dmx_sct_filter_params embedded struct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)  *		For section filter only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)  * @params.pes:	a &struct dmx_pes_filter_params embedded struct.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)  *		For PES filter only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)  * @type:	type of the dmxdev filter, as defined by &enum dmxdev_type.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)  * @state:	state of the dmxdev filter, as defined by &enum dmxdev_state.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)  * @dev:	pointer to &struct dmxdev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)  * @buffer:	an embedded &struct dvb_ringbuffer buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)  * @vb2_ctx:	control struct for VB2 handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116)  * @mutex:	protects the access to &struct dmxdev_filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)  * @timer:	&struct timer_list embedded timer, used to check for
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)  *		feed timeouts.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)  *		Only for section filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120)  * @todo:	index for the @secheader.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)  *		Only for section filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)  * @secheader:	buffer cache to parse the section header.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)  *		Only for section filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) struct dmxdev_filter {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 		struct dmx_section_filter *sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	} filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		/* list of TS and PES feeds (struct dmxdev_feed) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		struct list_head ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 		struct dmx_section_feed *sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 	} feed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 	union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		struct dmx_sct_filter_params sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 		struct dmx_pes_filter_params pes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	} params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	enum dmxdev_type type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	enum dmxdev_state state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	struct dmxdev *dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 	struct dvb_ringbuffer buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 	struct dvb_vb2_ctx vb2_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	/* only for sections */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct timer_list timer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	int todo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	u8 secheader[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)  * struct dmxdev - Describes a digital TV demux device.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158)  * @dvbdev:		pointer to &struct dvb_device associated with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)  *			the demux device node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)  * @dvr_dvbdev:		pointer to &struct dvb_device associated with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161)  *			the dvr device node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)  * @filter:		pointer to &struct dmxdev_filter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)  * @demux:		pointer to &struct dmx_demux.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)  * @filternum:		number of filters.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)  * @capabilities:	demux capabilities as defined by &enum dmx_demux_caps.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)  * @may_do_mmap:	flag used to indicate if the device may do mmap.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)  * @exit:		flag to indicate that the demux is being released.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)  * @dvr_orig_fe:	pointer to &struct dmx_frontend.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169)  * @dvr_buffer:		embedded &struct dvb_ringbuffer for DVB output.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)  * @dvr_vb2_ctx:	control struct for VB2 handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)  * @mutex:		protects the usage of this structure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)  * @lock:		protects access to &dmxdev->filter->data.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) struct dmxdev {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	struct dvb_device *dvbdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	struct dvb_device *dvr_dvbdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	struct dmxdev_filter *filter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	struct dmx_demux *demux;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	int filternum;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	int capabilities;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	unsigned int may_do_mmap:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	unsigned int exit:1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) #define DMXDEV_CAP_DUPLEX 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	struct dmx_frontend *dvr_orig_fe;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 	struct dvb_ringbuffer dvr_buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) #define DVR_BUFFER_SIZE (10*188*1024)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	struct dvb_vb2_ctx dvr_vb2_ctx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	struct mutex mutex;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	spinlock_t lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)  * dvb_dmxdev_init - initializes a digital TV demux and registers both demux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200)  *	and DVR devices.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)  * @dmxdev: pointer to &struct dmxdev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203)  * @adap: pointer to &struct dvb_adapter.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) int dvb_dmxdev_init(struct dmxdev *dmxdev, struct dvb_adapter *adap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)  * dvb_dmxdev_release - releases a digital TV demux and unregisters it.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210)  * @dmxdev: pointer to &struct dmxdev.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) void dvb_dmxdev_release(struct dmxdev *dmxdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) #endif /* _DMXDEV_H_ */