Discovered the bug that were limiting the output format to just RGB565.
Now, it is possible to output image at Bayer format (the original one,
as generated by Silvercrest sensor, and two others), and also on YUY.

Adds Bayer formats also to the driver.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This webcam uses a em2710 chipset, that identifies itself as em2820,
plus a mt9v011 sensor, and a DY-301P lens.

It needs a few different initializations than a normal em28xx device.

Thanks to Hans de Goede <hdegoede@redhat.com> and Douglas Landgraf
<dougsland@redhat.com> for providing the acces for the webcam during
this weekend, I could make a patch for it while returning back from
FISL/Fudcom LATAM 2009.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

In cases where the device does not actually provide a USB audio class *or*
vendor audio, do not load the driver that provides vendor audio support (such
as the KWorld 2800d).  Otherwise, the /dev/audio1 device file gets created and
users get confused.

Also, reworks the logic a bit so that we don't try to inspect the register
content if the register read failed entirely.
Signed-off-by: NDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The em28xx actually has a register that tells the driver what the maximum
packet size is (based on a value programmed into the eeprom).  Make use of
that register instead of assuming a hardcoded value of 564 (since 564 is not
correct for devices that do QAM such as the KWorld 340u).

Note that for now the em2874 code isn't there, falling back to the 564 value,
however this is not a problem since there are not any em2874 based devices in
the current v4l-dvb tree).

Thanks to Jarod Wilson for detecting the initial problem and figuring out that
the isoc configuration was wrong for his device.

Cc: Jarod Wilson <jarod@wilsonet.com>
Signed-off-by: NDevin Heitmueller <dheitmueller@kernellabs.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Fix typo usbtransfer->usb transfer on em28xx_errdev message.
Signed-off-by: NFilipe Rosset <rosset.filipe@gmail.com>
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

It is no longer needed to use a struct pointer as argument, since v4l2_subdev
doesn't require that ioctl-like approach anymore. Instead just pass the input,
output and config (new!) arguments directly.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Converted em28xx driver to v4l2_subdev.
Thanks to Hans Verkuil <hverkuil@xs4all.nl> for helping this conversion.
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Add missing URB_NO_TRANSFER_DMA_MAP flag, since	the use	of consistent memory
is not permitted for DMA on the ARM platform.

Thanks to Paul Thomas <pthomas8589@gmail.com> for providing sample ARM
hardware that was experiencing the oops (tested on the at91rm9200 based
LinuxStamp).

Thanks to David Brownell <david-b@pacbell.net> for providing insight into the
ARM memory architecture.
Signed-off-by: NDevin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Compro VideoMate uses an external audio DSP chip, controlled via tvaudio
module (tda9874a). This patch improves em28xx infrastructure to support
an external audio processor and fixes the Compro VideoMate entry to work
with it.
Signed-off-by: NVitaly Wool <vital@embeddedalley.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Lots of coding style fixes and a typo correction for em28xx.

[dougsland@redhat.com: fixed a reject due to a change on em28xx-audio.c]
Signed-off-by: NNicola Soranzo <nsoranzo@tiscali.it>
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Fix for em28xx memory leak and function rename
Signed-off-by: NRobert Krakora <rob.krakora@messagenetsystems.com>
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Clock (XCLK) Cleanup
Signed-off-by: NRobert Krakora <rob.krakora@messagenetsystems.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Trace:  (Provided by Douglas)

BUG: sleeping function called from invalid context at drivers/usb/core/urb.c:558
in_atomic():0, irqs_disabled():1
Pid: 4918, comm: sox Not tainted 2.6.27.5 #1
 [<c04246d8>] __might_sleep+0xc6/0xcb
 [<c058c8b0>] usb_kill_urb+0x1a/0xd8
 [<c0488e68>] ? __kmalloc+0x9b/0xfc
 [<c0488e85>] ? __kmalloc+0xb8/0xfc
 [<c058cd5a>] ? usb_alloc_urb+0xf/0x31
 [<f8dd638c>] em28xx_isoc_audio_deinit+0x2f/0x6c [em28xx_alsa]
 [<f8dd6573>] em28xx_cmd+0x1aa/0x1c5 [em28xx_alsa]
 [<f8dd65e1>] snd_em28xx_capture_trigger+0x53/0x68 [em28xx_alsa]
 [<f8aa8674>] snd_pcm_do_start+0x1c/0x23 [snd_pcm]
 [<f8aa85d7>] snd_pcm_action_single+0x25/0x4b [snd_pcm]
 [<f8aa9833>] snd_pcm_action+0x6a/0x76 [snd_pcm]
 [<f8aa98f5>] snd_pcm_start+0x14/0x16 [snd_pcm]
 [<f8aae10e>] snd_pcm_lib_read1+0x66/0x273 [snd_pcm]
 [<f8aac5a3>] ? snd_pcm_kernel_ioctl+0x46/0x5f [snd_pcm]
 [<f8aae4a7>] snd_pcm_lib_read+0xbf/0xcd [snd_pcm]
 [<f8aad774>] ? snd_pcm_lib_read_transfer+0x0/0xaf [snd_pcm]
 [<f89feeb6>] snd_pcm_oss_read3+0x99/0xdc [snd_pcm_oss]
 [<f89fef9c>] snd_pcm_oss_read2+0xa3/0xbf [snd_pcm_oss]
 [<c064169d>] ? _cond_resched+0x8/0x32
 [<f89ff0be>] snd_pcm_oss_read+0x106/0x150 [snd_pcm_oss]
 [<f89fefb8>] ? snd_pcm_oss_read+0x0/0x150 [snd_pcm_oss]
 [<c048c6e2>] vfs_read+0x81/0xdc
 [<c048c7d6>] sys_read+0x3b/0x60
 [<c04039bf>] sysenter_do_call+0x12/0x34
 =======================

The culprit in the trace is snd_pcm_action() which invokes a spin lock
which disables pre-emption which disables an IRQ which causes the
__might_sleep() function to fail the irqs_disabled() test.  Since
pre-emption is enabled then it is safe to de-allocate the memory if
you first unlink each URB.  In this instance you are safe since
pre-emption is disabled.  If pre-emption and irqs are not disabled then
call usb_kill_urb(), else call usb_unlink_urb().

Thanks to Douglas for tracking down this bug originally!!!

[dougsland@redhat.com: Fixed codyingstyle]
Signed-off-by: NRobert Krakora <rob.krakora@messagenetsystems.com>
Signed-off-by: NDouglas Schilling Landgraf <dougsland@redhat.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Fix for KWorld 330U AC97

Many thanks to Devin and Mauro again!!!
Signed-off-by: NRobert Krakora <rob.krakora@messagenetsystems.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Some em28xx devices use the PCM IN AC 97 PIN for digital audio. However,
currently, the PCM IN selection is not set by the driver. This patch allows
specifying the PCM IN expected output, via board description table.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

/home/v4l/master/v4l/em28xx-core.c:396:25: warning: symbol 'outputs' was not declared. Should it be static?
/home/v4l/master/v4l/em28xx-input.c:324:6: warning: symbol 'em28xx_ir_start' was not declared. Should it be static?
/home/v4l/master/v4l/em28xx-cards.c:1925:5: warning: symbol 'em28xx_init_dev' was not declared. Should it be static?
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Introduce a struct v4l2_file_operations for v4l2 drivers.

Remove the unnecessary inode argument.

Move compat32 handling (and llseek) into the v4l2-dev core: this is now
handled in the v4l2 core and no longer in the drivers themselves.

Note that this changeset reverts an earlier patch that changed the return
type of__video_ioctl2 from int to long. This change will be reinstated
later in a much improved version.
Signed-off-by: NHans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The current code was trying to query the AC97 registers for the vendor
information even if it was clearly not a AC97 audio device (resulting in errors
in the dmesg output).  This was due to a bug in the way we did the check.
Signed-off-by: NDevin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Like the em2874, the em2870 does not have any analog support, so don't bother
loading the em28xx-alsa module.
Signed-off-by: NDevin Heitmueller <dheitmueller@linuxtv.org>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

em28xx-video were holding several code that are not specific to V4L2
interface.

This patch moves the core code for em28xx-core, and usb probing code
into em28xx-cards.

This opens the possibility of breaking em28xx into a core module and a
V4L2 module, loaded only on devices that have analog interfaces.

Some cleanup may be done at em28xx-cards to optimize the config code.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The em28xx driver can be coupled to an anciliary AC97 chip. This patch
allows read/write AC97 registers directly.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch uses the same code for enumberating video formats that are
present on cx88, bttv and saa7134 drivers.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Change log format to look more like URB transactions. In fact, setup and
IN/OUT transactions are merged. This helps to debug the driver.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Several chips may be turned off when the device is not used, like audio,
video and dvb demods. This patch adds a gpio callback at the core
structs to allow turning off such devices.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

A previous changeset moved gpio from em28xx struct into em28xx_board.
However, the driver were not updated to properly honor those gpio's.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Replaces all occurrences of em28xx_write_regs_req() and em28xx_write_reg()
used to setup register names by em28xx_write_reg().

Also, documents the register names that are known.

This patch were generated by this small perl script:

my %reg_map = (
	# Register table - the same as defined on parse_em28xx.pl script
);

while (<>) {
	if (m/(.*)em28xx_write_regs_req\(dev\,\s*0x00\,\s*(.*)\,\s*\"\\x(..)\",\s*1\)\;(.*)/) {
		my $reg = $2;
		my $val = $3;
		$val =~ tr/A-f/a-f/;
		$reg = $reg_map{$reg} if defined($reg_map{$reg});
		printf "$1em28xx_write_reg(dev, %s, 0x%s);$4\n", $reg, $val;
	} elsif (m/(.*)em28xx_write_regs\(dev\,\s*(.*)\,\s*\"\\x(..)\",\s*1\)\;(.*)/) {
		my $reg = $2;
		my $val = $3;
		$val =~ tr/A-f/a-f/;
		$reg = $reg_map{$reg} if defined($reg_map{$reg});
		printf "$1em28xx_write_reg(dev, %s, 0x%s);$4\n", $reg, $val;
	} else {
		print $_;
	}
}
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Several fields are duplicated on both structs. Let's just copy em28xx_board instead.

A later cleanup could just copy the fields that are changed, in order to keep em28xx_board
const.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The previous patches removed XCLK and I2C magic. Now, we finally know
what those registers do. Also, only a very few cards need different
setups for those.

Instead of keeping the setups for those values inside the per-device
hack magic switch, move the uncommon values to the board-specific
struct, and have a common setup for all other boards.

So, almost 100 lines of hacking magic were removed.

A co-lateral effect of this patch is that it also fixes a bug at em28xx-core, where xclk
were set, without taking any care about not overriding a previous xclk setup.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Some devices use more than one AC97 outputs. This patch allows such
devices to properly work.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Some boards use different AC97 setups for output. This patch adds the
capability of specifying the output to be used. Currently, only one
output is selected, but the better is to allow user to select it via a
mixer, on alsa driver.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Introduce a new function that writes to a single register.  This is
useful because the vast majority of register writes are a single
register, and this format permits or'ing register value bits together.
Signed-off-by: NDevin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

AC97 devices provide several input and outputs. However, before this
patch, em28xx device weren't properly allowing the usage of ac97
possible combinations. Also, several input volumes were left untouched,
instead of making sure that the volumes were set on mute state.

This patch improves support for ac97 devices by allowing to use any
inputs, and making sure that unused inputs are set on mute state.

Yet, some work is still needed to select the AC97 output.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This makes easier to identify vendor ID, since AC97 vendors are
generally identified by 3 bytes. The remaining byte is used by the
vendor to identify its devices.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This patch properly implements audio handling on em28xx. Before this
patch, it was assumed that every device has an Empia 202 audio chip.
However, this is not true.

After this patch, specific AC97 chipset setup and configurations can be
done.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Previously, AC97 registers were named as if they were part of em28xx
device, generating some confusion. Replace such names for a more general
naming convention.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Properly support capture start on em2874

The transport stream enable register moved in the em2874, so make it work
properly.

Thanks for Ray Lu from Empia for providing the em2874 datasheet.
Signed-off-by: NDevin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Empia moved the location of the GPIO/GPO registers in newer devices.  Add the
ability to specify the relocated registers (including caching of register
contents).

Thanks for Ray Lu from Empia for providing the em2874 datasheet.
Signed-off-by: NDevin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Now that we have a polling task for IR, there's a race condition, since
IR can be polling while other operations are being doing. Also, we are
now sharing the same urb_buf for both read and write control urb
operations. So, we need a mutex.

Thanks to Davin Heitmueller <devin.heitmueller@gmail.com> for warning me.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>