Also improve the comments.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The URB data processing for DVB bulk transfers is very similar to
what is done with isoc transfers, so create a common function that
works with both transfer types based on the existing isoc function.
Tested with device Hauppauge HVR-930c.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The URB data processing for bulk transfers is very similar to what
is done with isoc transfers, so create a common function that works
with both transfer types based on the existing isoc function.

[mchehab@redhat.com: Fix a CodingStyle issue: don't break strings
 into separate lines]
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

The URB data processing for bulk transfers is very similar to what
is done with isoc transfers, so create a common function that works
with both transfer types based on the existing isoc function.

[mchehab@redhat.com: Fix a CodingStyle issue: don't break strings
 into separate lines]
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This check is already done in the URB handler
em28xx_irq_callback before calling these functions.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

[mchehab@redhat.com: Fix a CodingStyle issue: don't break strings
 into separate lines]
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

- rename em28xx_init_isoc to em28xx_init_usb_xfer
- add parameter for isoc/bulk transfer selection which is passed to em28xx_alloc_urbs
- rename local variable isoc_buf to usb_bufs
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Rename the existing function for isoc transfers em28xx_init_isoc
to em28xx_init_usb_xfer and extend it.
URB allocation and setup is now done depending on the USB
transfer type, which is selected with a new function parameter.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

This function will be used to uninitialize USB bulk transfers, too.
Also rename the local variable isoc_bufs to usb_bufs.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

em28xx_irq_callback can be used for isoc and bulk transfers.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

It isn't used anymore and uses constants which no longer exist.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Also rename the corresponding field isoc_ctl in struct em28xx
to usb_ctl.
We will use this struct for USB bulk transfers, too.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

It will be used for USB bulk transfers, too.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Rename EM28XX_NUM_PACKETS to EM28XX_NUM_ISOC_PACKETS and
EM28XX_DVB_MAX_PACKETS to EM28XX_DVB_NUM_ISOC_PACKETS to
clarify that these values are used only for isoc usb transfers.
Also use the term num_packets instead of max_packets, as this
is how these values are used and called in struct urb.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

em28xx_copy_video uses a wrong offset for the target buffer
when copying the data from an USB isoc packet. This happens
only for the second and all following lines in the packet.
The reason why this bug doesn't cause image corruption with
my test device (SilverCrest Webcam 1.3 MPix) is, that this
device never sends any packets that cross the end of a line.
I don't know if all devices behave like this, so this patch
should be considered for stable.
With the upcoming patches to add support for USB bulk transfers,
em28xx_copy_video will be called once per URB, which will
always trigger this bug.
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

When em28xx_ir_init() fails due to an configuration error, it frees the memory
of struct em28xx_IR *ir, but doesn't set the corresponding pointer in the
device struct to NULL.
On device removal, em28xx_ir_fini() gets called, which then calls
rc_unregister_device() with a pointer to freed memory.
Fixes bug 26572 (http://bugzilla.kernel.org/show_bug.cgi?id=26572)
Signed-off-by: NFrank Schäfer <fschaefer.oss@googlemail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Newer em28xx chipsets (em2874 and upper) are capable of supporting
RC6 codes, on both mode 0 (command mode, 16 bits payload size, similar
to RC5, also called "Philips mode") and mode 6a (OEM command mode,
with offers a few alternatives with regards to the payload size).
I don't have any mode 6a control ATM to test it, so, I opted to add
support only to mode 0.
After this patch, adding support to mode 6a should not be hard.
Tested with a Philips television remote controller.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

By disabling the NEC parity check, it is possible to handle all 3 NEC
protocol variants (32, 24 or 16 bits).
Change the driver in order to handle all of them.
Unfortunately, em2860/em2863 provide only 16 bits for the IR scancode,
even when NEC parity is disabled. So, this change should affect only
em2874 and newer devices, with provides up to 32 bits for the scancode.
Tested with one NEC-16, one NEC-24 and one RC5 IR.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

Those two tuners may also be needed.
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

I noticed that the EM28XX DVB driver doesn't auto select all of the
appropriate DVB tuner modules required. In particular I needed
DVB_LGDT3305 for my a340, but it looks like DVB_MT352 + DVB_S5H1409 were
missing as well.
Signed-Off-by: NJonathan McDowell <noodles@earth.li>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
and add pr_fmt.
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
and add pr_fmt.
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
- WARNING: Prefer netdev_notice(netdev, ... then dev_notice(dev, ... then pr_notice(...  to printk(KERN_NOTICE ...
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
and add pr_fmt.
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
and add pr_fmt.
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
and add pr_fmt.
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
- WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
and add pr_fmt.
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_warn(netdev, ... then dev_warn(dev, ... then pr_warn(...  to printk(KERN_WARNING ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
- WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch error.
- ERROR: that open brace { should be on the previous line
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch error.
- ERROR: that open brace { should be on the previous line
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

dvb_unregister_frontend has to be called before detach. Otherwise the
unregister call will segfault. This made tm6000-dvb module unload unusable.
Signed-off-by: NJulian Scheel <julian@jusst.de>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
- WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warnings.
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>

fixed below checkpatch warning.
- WARNING: Prefer netdev_info(netdev, ... then dev_info(dev, ... then pr_info(...  to printk(KERN_INFO ...
- WARNING: Prefer netdev_dbg(netdev, ... then dev_dbg(dev, ... then pr_debug(...  to printk(KERN_DEBUG ...
- WARNING: Prefer netdev_err(netdev, ... then dev_err(dev, ... then pr_err(...  to printk(KERN_ERR ...
Signed-off-by: NYAMANE Toshiaki <yamanetoshi@gmail.com>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>