The Media Controller New Generation redefines the types for both
interfaces and entities to be used on DVB. Make the needed
changes at the DVB core for all interfaces, entities and
data and interface links to appear in the graph.
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The entire logic that represent graph links were developed on a
time where there were no needs to dynamic remove links. So,
although links are created/removed one by one via some
functions, they're stored as an array inside the entity struct.

As the array may grow, there's a logic inside the code that
checks if the amount of space is not enough to store
the needed links. If it isn't the core uses krealloc()
to change the size of the link, with is bad, as it
leaves the memory fragmented.

So, convert links into a list.

Also, currently,  both source and sink entities need the link
at the graph traversal logic inside media_entity. So there's
a logic duplicating all links. That makes it to spend
twice the memory needed. This is not a big deal for today's
usage, where the number of links are not big.

Yet, if during the MC workshop discussions, it was said that
IIO graphs could have up to 4,000 entities. So, we may
want to remove the duplication on some future. The problem
is that it would require a separate linked list to store
the backlinks inside the entity, or to use a more complex
algorithm to do graph backlink traversal, with is something
that the current graph traversal inside the core can't cope
with. So, let's postpone a such change if/when it is actually
needed.

It should also be noticed that the media_link structure uses
44 bytes on 32-bit architectures and 84 bytes on 64-bit
architecture. It will thus be allocated out of the 64-bytes and
96-bytes pools respectively. That's a 12.5% memory waste on
64-bit architectures and 31.25% on 32-bit architecture.
A linked list is less efficient than an array in this case, but
this could later be optimized if we can get rid of the reverse
links (with would reduce memory allocation by 50%).
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As pointed by Laurent Navet:
	"Calling ktime_add_us() seems useless as is only useful
	 for it's return value which is ignored."

That's reported by coverity CID 1309761.

Laurent proposed to just remove ktime_add_us, but the fact is that
the logic of this function is broken. Instead, we need to use the
value of the timeout, and ensure that it will work on the loops
to emulate the legacy DiSEqC ioctl (FE_DISHNETWORK_SEND_LEGACY_CMD).

Please notice that the logic was also broken if, for any reason,
msleep() would sleep a little less than what it was expected, as
newdelta would be smaller than delta, and udelay() would not be called.

It should also be noticed that nobody noticed that trouble before
likely because the FE_DISHNETWORK_SEND_LEGACY_CMD is not used
anymore by modern DVB applications.
Reported-by: NLaurent Navet <laurent.navet@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

When in FE_TUNE_MODE_ONESHOT the frontend must report
the actual capabilities so user can take appropriate
action.

With frontends that can't do auto inversion this is done
by dvb-core automatically so CAN_INVERSION_AUTO is valid.

However, when in FE_TUNE_MODE_ONESHOT this is not true.

So only set FE_CAN_INVERSION_AUTO in modes other than
FE_TUNE_MODE_ONESHOT
Signed-off-by: NMalcolm Priestley <tvboxspy@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As SEC tone and voltage could have changed during
suspend(), restore them to their previous values at
resume().
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

This function is used mainly at the DVB core, in order to provide
emulation for a legacy ioctl. The only current exception is
the stv0299 driver, with takes more than 8ms to switch voltage,
breaking the emulation for FE_DISHNETWORK_SEND_LEGACY_CMD.

Document that.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The dvb_frontend.c core defines a FE_ALGO_HW symbol that it is
never used. Also, both cx24123 returns 1 to get_algo() callback
instead of using DVBFE_ALGO_HW.

Probably, those are some left overs from some code cleanup.

Let's stop returning magic numbers and use the proper macro
value.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: NJonathan Corbet <corbet@lwn.net>

Quite a few of the ->diseqc_send_master_cmd() implementations don't
check cmd->msg_len so it can lead to memory corruption.
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

struct timeval uses a 32-bit seconds representation which will
overflow in the year 2038 and beyond. This patch replaces
the usage of struct timeval with ktime_t which is a 64-bit
timestamp and is year 2038 safe.
This patch is part of a larger attempt to remove all instances
of 32-bit timekeeping variables (timeval, timespec, time_t)
which are not year 2038 safe, from the kernel.

[mchehab@osg.samsung.com: add a missing parenthesis, breaking compilation]
Suggested-by: NArnd Bergmann <arndb@arndb.de>
Signed-off-by: NTina Ruchandani <ruchandani.tina@gmail.com>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The DVB API was originally defined using typedefs. This is against
Kernel CodingStyle, and there's no good usage here. While we can't
remove its usage on userspace, we can avoid its usage in Kernelspace.

So, let's do it.

This patch was generated by this shell script:

	for j in $(grep typedef include/uapi/linux/dvb/frontend.h |cut -d' ' -f 3); do for i in $(find drivers/media -name '*.[ch]' -type f) $(find drivers/staging/media -name '*.[ch]' -type f); do sed "s,${j}_t,enum $j," <$i >a && mv a $i; done; done

While here, make CodingStyle fixes on the affected lines.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
Acked-by: Stefan Richter <stefanr@s5r6.in-berlin.de> # for drivers/media/firewire/*

Frontend bandwidth calculation overflows on very high DVB-S/S2
symbol rates. Use mult_frac() macro in order to keep calculation
correct.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

if CONFIG_MEDIA_CONTROLLER_DVB is not selected, it is now
producing this warning:

drivers/media/dvb-core/dvb_frontend.c: In function ‘dvb_frontend_thread’:
drivers/media/dvb-core/dvb_frontend.c:695:6: warning: unused variable ‘ret’ [-Wunused-variable]
  int ret;
      ^
Reported-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The logic there tries to start the media entity even if it
doesn't exist, causing this bug:

	[  314.356162] BUG: unable to handle kernel NULL pointer dereference at 0000000000000010
	[  314.356202] IP: [<ffffffffa02ef74c>] media_entity_pipeline_start+0x1c/0x390 [media]
Reported-by: NGert-Jan van der Stroom <gjstroom@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

While the DVB thread is running, the media pipeline should be
streaming. This should prevent any attempt of using the analog
TV while digital TV is working, and vice-versa.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

If the dvb frontend thread starts, the tuner should be switched
to the frontend. Add a code that ensures that this will happen,
using the media controller.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Now that the dvb core is capable of registering devices via the
media controller, add support for the DVB frontend devices.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

Signed-off-by: NAkihiro Tsukada <tskd08@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

As reported by smatch:

drivers/media/dvb-core/dvb_frontend.c:1960:45: warning: incorrect type in argument 2 (different address spaces)
drivers/media/dvb-core/dvb_frontend.c:1960:45:    expected void const [noderef] <asn:1>*from
drivers/media/dvb-core/dvb_frontend.c:1960:45:    got struct dtv_property *[noderef] <asn:1>props
drivers/media/dvb-core/dvb_frontend.c:1992:45: warning: incorrect type in argument 2 (different address spaces)
drivers/media/dvb-core/dvb_frontend.c:1992:45:    expected void const [noderef] <asn:1>*from
drivers/media/dvb-core/dvb_frontend.c:1992:45:    got struct dtv_property *[noderef] <asn:1>props
drivers/media/dvb-core/dvb_frontend.c:2014:38: warning: incorrect type in argument 1 (different address spaces)
drivers/media/dvb-core/dvb_frontend.c:2014:38:    expected void [noderef] <asn:1>*to
drivers/media/dvb-core/dvb_frontend.c:2014:38:    got struct dtv_property *[noderef] <asn:1>props
drivers/media/dvb-core/dvb_frontend.c:1946:17: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1947:17: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1951:22: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1951:42: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1954:31: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1960:41: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1960:54: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1965:33: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1978:17: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1979:17: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1983:22: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1983:42: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1986:31: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1992:41: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:1992:54: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:2007:33: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:2014:34: warning: dereference of noderef expression
drivers/media/dvb-core/dvb_frontend.c:2014:52: warning: dereference of noderef expression
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>

The needed bandwidth can be estimated using the symbol rate and
the rolloff factor. This could be useful for the frontend drivers,
as they don't need to calculate it themselves.
Reported-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

While several tuners have some sort of suspend/resume
implementation, this is currently mangled with an optional
.sleep callback that it is also used to put the device on
low power mode.

Not all drivers implement it, as returning the driver from
low power may require to re-load the firmware, with takes
some time. Also, some drivers may delay it.

So, the more coherent is to add two new optional callbacks
that will let the tuners to directy implement suspend and
resume callbacks if they need.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Some fe drivers will have to do additional initialization
in their fe ops.init interfaces when called during resume.
Without the additional initialization, fe and tuner driver
resume fails. A new fe exit flag value DVB_FE_DEVICE_RESUME
is necessary to detect resume case. This patch adds a new
define and changes dvb_frontend_resume() to set it prior to
calling fe init and tuner init calls and resets it back to
DVB_FE_NO_EXIT once fe and tuner init is done.
Signed-off-by: NShuah Khan <shuah.kh@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Some fe drivers attempt to access the device for power control from
their release routines. When release routines are called after device
is disconnected, the attempts fail. fe drivers should avoid accessing
the device, from their release interfaces when called from disconnect
path. dvb-frontend maintains exit flag to keep track when fe device is
disconnected in its private data structures. Export the flag in fe to
enable drivers to check the device status from their release interfaces.
Signed-off-by: NShuah Khan <shuah.kh@samsung.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

The dvb_attach() was unbalanced, as there was no dvb_dettach. Ok,
on current cases, the dettach is done by dvbdev, but that are some
future corner cases where we may need to do this before registering
the frontend.

So, add a dvb_detach() and use it at dvb_frontend.c.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Check if index is within bounds _before_ accessing the value.
Signed-off-by: NOle Ernst <olebowle@gmx.com>
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

If an attempt to set LNA fails, restore the cache to LNA_AUTO,
in order to make it to reflect the current LNA status.
Signed-off-by: NMauro Carvalho Chehab <m.chehab@samsung.com>

Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk>

The stats are cleared by the frontend. Don't do it at DTV_CLEAR.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The current logic was broken and too complex; while it works
fine for DVB-S2/DVB-S, it is broken for ISDB-T.
Make the logic simpler, fixes it for ISDB-T and make it clearer.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This function is complex, and has different workflows, one for
DVBv3 calls, and another one for DVBv5 calls. Break it into 3
functions, in order to make easier to understand what each
block does.
No functional changes so far. A few comments got improved.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

As reported by Klaus Schmidinger:
 "In VDR I use an ioctl() call with FE_READ_UNCORRECTED_BLOCKS on a
  device (using stb0899).  After this call I check 'errno' for
  EOPNOTSUPP to determine whether this device supports this call.  This
  used to work just fine, until a few months ago I noticed that my
  devices using stb0899 didn't display their signal quality in VDR's OSD
  any more.  After further investigation I found that
  ioctl(FE_READ_UNCORRECTED_BLOCKS) no longer returns EOPNOTSUPP, but
  rather ENOTTY.  And since I stop getting the signal quality in case
  any unknown errno value appears, this broke my signal quality query
  function."

While the changes reflect what is there at:

  http://comments.gmane.org/gmane.linux.kernel/1235728

it does cause regression on userspace.  So, revert it to stop the
damage.

This reverts commit 177ffe50 ("[media] dvb_frontend: return -ENOTTY
for unimplement IOCTL").
Reported-by: NKlaus Schmidinger <Klaus.Schmidinger@tvdr.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

If userspace calls a property that doesn't exist, it currently
just returns -EINVAL. However, this is more likely a problem at
the userspace application, calling it with a non-existing property.
So, add a debug message to help tracking it.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add the logic to poll, reset counters and report the QoS stats
to the end user.
The idea is that the core will periodically poll the frontend for
the stats. The frontend may return -EBUSY, if the previous collect
didn't finish, or it may fill the cached data.
The value returned to the end user is always the cached data.
Reviewed-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This kind of memcpy() is error-prone. Its replacement with a struct
assignment is prefered because it's type-safe and much easier to read.
Found by coccinelle. Hand patched and reviewed.
Tested by compilation only.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier struct_name;
struct struct_name to;
struct struct_name from;
expression E;
@@
-memcpy(&(to), &(from), E);
+to = from;
// </smpl>
Signed-off-by: NPeter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: NEzequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

That likely fixes this MythTV ticket:
	http://code.mythtv.org/trac/ticket/10830
(which btw affects all usb tuners I tested as well, pctv452e,
dib0700, af9015)  pctv452e is still possibly broken with MythTV
even after this fix; it does work with VDR here tho despite I2C
errors.
Reduced testcase:
	http://people.freebsd.org/~nox/tmp/ioctltst.c
Thanx to devinheitmueller and crope from #linuxtv for helping with
this fix! :)
Signed-off-by: NJuergen Lock <nox@jelal.kn-bremen.de>
Signed-off-by: NMichael Krufky <mkrufky@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/dvb-core/dvb_frontend.c:1032:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1032:2: warning: (near initialization for 'dtv_cmds[36]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1033:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1033:2: warning: (near initialization for 'dtv_cmds[37]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1034:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1034:2: warning: (near initialization for 'dtv_cmds[38]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1035:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1035:2: warning: (near initialization for 'dtv_cmds[39]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1036:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1036:2: warning: (near initialization for 'dtv_cmds[40]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1037:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1037:2: warning: (near initialization for 'dtv_cmds[60]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1045:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1045:2: warning: (near initialization for 'dtv_cmds[46]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1051:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1051:2: warning: (near initialization for 'dtv_cmds[52]') [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1060:2: warning: initialized field overwritten [-Woverride-init]
drivers/media/dvb-core/dvb_frontend.c:1060:2: warning: (near initialization for 'dtv_cmds[61]') [-Woverride-init]
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

* use dvb property cache
* implement get (thus API minor++)
* PCTV 290e: 1=LNA ON, all the other values LNA OFF
  Also fix PCTV 290e LNA comment, it is disabled by default
Hans and Mauro proposed use of cache implementation of get as they
were planning to extend LNA usage for analog side too.
Reported-by: NHans Verkuil <hverkuil@xs4all.nl>
Reported-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Acked-by: NHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A simplified version of the semantic patch that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@r1@
statement S;
position p,p1;
@@
S@p1;@p
@script:python r2@
p << r1.p;
p1 << r1.p1;
@@
if p[0].line != p1[0].line_end:
        cocci.include_match(False)
@@
position r1.p;
@@
-;@p
// </smpl>

[mchehab@redhat.com: some hunks got bitroted; applied only the
 ones that succeeds]
Signed-off-by: NPeter Senna Tschudin <peter.senna@gmail.com>
[crope@iki.fi: For my drivers a8293, af9013, af9015, af9035]
Acked-by: NAntti Palosaari <crope@iki.fi>
Reviewed-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Demodulator cannot perform statistic IOCTLs when it is not tuned.
Return -EAGAIN in such case.
Signed-off-by: NAntti Palosaari <crope@iki.fi>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Unify multistream support at the DVBAPI: several delivery systems
allow it. Yet, each one had its own name. So, instead of adding
a third version of this field, remove the per-standard naming,
unifying it into a common name.

The legacy code number can still be used by old applications.

Version increased to 5.8.

[mchehab@redhat.com: joined the va1j5jf007s patch, in order to
 avoid compilation breakage]
Signed-off-by: NEvgeny Plehov <EvgenyPlehov@ukr.net>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>