V4L: cx18: Upgrade to newer firmware & update documentation

(cherry picked from commit 1a3932e0)

V4L: cx18: Upgrade to newer firmware & update cx18 documentation

Conexant graciously gave us permission to redistribute the
firmware. Update the documentation where the firmware can be
downloaded.
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

Documentation/video4linux/cx18.txt

@@ -23,14 +23,8 @@ encoder chip:
 
 Firmware:
 
-The firmware needs to be extracted from the Windows Hauppauge HVR-1600
-driver, available here:
+You can obtain the firmware files here:
 
-http://hauppauge.lightpath.net/software/install_cd/hauppauge_cd_3.4d1.zip
+http://dl.ivtvdriver.org/ivtv/firmware/cx18-firmware.tar.gz
 
-Unzip, then copy the following files to the firmware directory
-and rename them as follows:
-
-Drivers/Driver18/hcw18apu.rom -> v4l-cx23418-apu.fw
-Drivers/Driver18/hcw18enc.rom -> v4l-cx23418-cpu.fw
-Drivers/Driver18/hcw18mlC.rom -> v4l-cx23418-dig.fw
+Untar and copy the .fw files to your firmware directory.

drivers/media/video/cx18/cx18-firmware.c

@@ -90,7 +90,7 @@
 #define CX18_DSP0_INTERRUPT_MASK     	0xd0004C
 
 /* Encoder/decoder firmware sizes */
-#define CX18_FW_CPU_SIZE 		(174716)
+#define CX18_FW_CPU_SIZE 		(158332)
 #define CX18_FW_APU_SIZE 		(141200)
 
 #define APU_ROM_SYNC1 0x6D676553 /* "mgeS" */