media: cxd2099: move driver out of staging into dvb-frontends

According to the TODO file, this driver only landed in staging because of
the way device nodes and data transfers are handled. Besides that this way
(use of secX devices) has become sort of standard to date (ie. VDR
supports this literally since ages via the ddci plugin, TVHeadend received
this functionality lately, and minisatip being currently worked on
regarding this), most importantly this I2C client only driver isn't even
responsible for setting up device nodes, not for handling data
transfer and so on, but only serves as interface for the dvb_ca_en50221
subsystem, just like every other DVB card out in the wild, with hard-wired
or such flexible CA interfaces. And, it would even work with cards having
the cxd2099 controller hard-wired.

Also, this driver received quite some love and even is a proper I2C client
driver by now. So, as this driver acts as a EN50221 frontend device, move
it to dvb-frontends. There is no need to keep it buried in staging.

This commit also updates all affected Kconfig and Makefile's, and adds
MEDIA_AUTOSELECT depends to ddbridge and ngene.
Signed-off-by: Daniel Scheller <d.scheller@gmx.net>
Signed-off-by: Jasmin Jessich <jasmin@anw.at>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/media/dvb-frontends/Kconfig

@@ -904,6 +904,18 @@ config DVB_HELENE
 	help
 	  Say Y when you want to support this frontend.
 
+comment "Common Interface (EN50221) controller drivers"
+	depends on DVB_CORE
+
+config DVB_CXD2099
+	tristate "CXD2099AR Common Interface driver"
+	depends on DVB_CORE && I2C
+	---help---
+	  A driver for the CI controller currently found mostly on
+	  Digital Devices DuoFlex CI (single) addon modules.
+
+	  Say Y when you want to support these devices.
+
 comment "Tools to develop new frontends"
 
 config DVB_DUMMY_FE

drivers/media/dvb-frontends/Makefile

@@ -129,3 +129,4 @@ obj-$(CONFIG_DVB_HORUS3A) += horus3a.o
 obj-$(CONFIG_DVB_ASCOT2E) += ascot2e.o
 obj-$(CONFIG_DVB_HELENE) += helene.o
 obj-$(CONFIG_DVB_ZD1301_DEMOD) += zd1301_demod.o
+obj-$(CONFIG_DVB_CXD2099) += cxd2099.o

drivers/media/pci/ddbridge/Kconfig

@@ -13,6 +13,7 @@ config DVB_DDBRIDGE
 	select DVB_LNBH25 if MEDIA_SUBDRV_AUTOSELECT
 	select MEDIA_TUNER_TDA18212 if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_MXL5XX if MEDIA_SUBDRV_AUTOSELECT
+	select DVB_CXD2099 if MEDIA_SUBDRV_AUTOSELECT
 	---help---
 	  Support for cards with the Digital Devices PCI express bridge:
 	  - Octopus PCIe Bridge

drivers/media/pci/ddbridge/Makefile

@@ -10,6 +10,3 @@ obj-$(CONFIG_DVB_DDBRIDGE) += ddbridge.o
 
 ccflags-y += -Idrivers/media/dvb-frontends/
 ccflags-y += -Idrivers/media/tuners/
-
-# For the staging CI driver cxd2099
-ccflags-y += -Idrivers/staging/media/cxd2099/

drivers/media/pci/ngene/Kconfig

@@ -8,6 +8,7 @@ config DVB_NGENE
 	select DVB_DRXK if MEDIA_SUBDRV_AUTOSELECT
 	select DVB_TDA18271C2DD if MEDIA_SUBDRV_AUTOSELECT
 	select MEDIA_TUNER_MT2131 if MEDIA_SUBDRV_AUTOSELECT
+	select DVB_CXD2099 if MEDIA_SUBDRV_AUTOSELECT
 	---help---
 	  Support for Micronas PCI express cards with nGene bridge.
 

drivers/media/pci/ngene/Makefile

@@ -9,6 +9,3 @@ obj-$(CONFIG_DVB_NGENE) += ngene.o
 
 ccflags-y += -Idrivers/media/dvb-frontends/
 ccflags-y += -Idrivers/media/tuners/
-
-# For the staging CI driver cxd2099
-ccflags-y += -Idrivers/staging/media/cxd2099/

drivers/staging/media/Kconfig

@@ -23,8 +23,6 @@ source "drivers/staging/media/atomisp/Kconfig"
 
 source "drivers/staging/media/bcm2048/Kconfig"
 
-source "drivers/staging/media/cxd2099/Kconfig"
-
 source "drivers/staging/media/davinci_vpfe/Kconfig"
 
 source "drivers/staging/media/imx/Kconfig"

drivers/staging/media/Makefile

 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_I2C_BCM2048)	+= bcm2048/
-obj-$(CONFIG_DVB_CXD2099)	+= cxd2099/
 obj-$(CONFIG_VIDEO_IMX_MEDIA)	+= imx/
 obj-$(CONFIG_SOC_CAMERA_IMX074)	+= imx074/
 obj-$(CONFIG_SOC_CAMERA_MT9T031)	+= mt9t031/

drivers/staging/media/cxd2099/Kconfig

-config DVB_CXD2099
-	tristate "CXD2099AR Common Interface driver"
-	depends on DVB_CORE && PCI && I2C
-	---help---
-	  Support for the CI module found on cards based on
-	  - Micronas ngene PCIe bridge: cineS2 etc.
-	  - Digital Devices PCIe bridge: Octopus series
-
-	  For now, data is passed through '/dev/dvb/adapterX/sec0':
-	    - Encrypted data must be written to 'sec0'.
-	    - Decrypted data can be read from 'sec0'.
-	    - Setup the CAM using device 'ca0'.

drivers/staging/media/cxd2099/Makefile

-obj-$(CONFIG_DVB_CXD2099) += cxd2099.o
-
-ccflags-y += -Idrivers/media/dvb-frontends/
-ccflags-y += -Idrivers/media/tuners/

drivers/staging/media/cxd2099/TODO

-For now, data is passed through '/dev/dvb/adapterX/sec0':
- - Encrypted data must be written to 'sec0'.
- - Decrypted data can be read from 'sec0'.
- - Setup the CAM using device 'ca0'.
-
-But this is wrong. There are some discussions about the proper way for
-doing it, as seen at:
-	http://www.mail-archive.com/linux-media@vger.kernel.org/msg22196.html
-
-While there's no proper fix for it, the driver should be kept in staging.
-
-Patches should be submitted to: linux-media@vger.kernel.org.