V4L/DVB (8474): pvrusb2: Enable IR chip on HVR-1900 class devices

The Zilog IR chip on HVR-1900 devices is held in reset when the device
initializes.  We have to bring this chip out of reset before LIRC has
any chance of operating the chip.  So do it.

Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

1 files changed, 17 insertions, 9 deletions

diff --git a/drivers/media/video/pvrusb2/pvrusb2-devattr.h b/drivers/media/video/pvrusb2/pvrusb2-devattr.h
index e23ce1d2edd7..cb3a33eb0276 100644
--- a/drivers/media/video/pvrusb2/pvrusb2-devattr.h
+++ b/drivers/media/video/pvrusb2/pvrusb2-devattr.h
@@ -48,6 +48,10 @@ struct pvr2_string_table {
 #define PVR2_LED_SCHEME_NONE 0
 #define PVR2_LED_SCHEME_HAUPPAUGE 1
 
+#define PVR2_IR_SCHEME_NONE 0
+#define PVR2_IR_SCHEME_24XXX 1
+#define PVR2_IR_SCHEME_ZILOG 2
+
 /* This describes a particular hardware type (except for the USB device ID
    which must live in a separate structure due to environmental
    constraints).  See the top of pvrusb2-hdw.c for where this is
@@ -126,15 +130,19 @@ struct pvr2_device_desc {
            ensure that it is found. */
         unsigned int flag_has_wm8775:1;
 
-        /* Device has IR hardware that can be faked into looking like a
-           normal Hauppauge i2c IR receiver.  This is currently very
-           specific to the 24xxx device, where Hauppauge had replaced their
-           'standard' I2C IR receiver with a bunch of FPGA logic controlled
-           directly via the FX2.  Turning this on tells the pvrusb2 driver
-           to virtualize the presence of the non-existant IR receiver chip and
-           implement the virtual receiver in terms of appropriate FX2
-           commands. */
-        unsigned int flag_has_hauppauge_custom_ir:1;
+        /* Indicate any specialized IR scheme that might need to be
+           supported by this driver.  If not set, then it is assumed that
+           IR can work without help from the driver (which is frequently
+           the case).  This is otherwise set to one of
+           PVR2_IR_SCHEME_xxxx.  For "xxxx", the value "24XXX" indicates a
+           Hauppauge 24xxx class device which has an FPGA-hosted IR
+           receiver that can only be reached via FX2 command codes.  In
+           that case the pvrusb2 driver will emulate the behavior of the
+           older 29xxx device's IR receiver (a "virtual" I2C chip) in terms
+           of those command codes.  For the value "ZILOG", we're dealing
+           with an IR chip that must be taken out of reset via another FX2
+           command code (which is the case for HVR-1950 devices). */
+        unsigned int ir_scheme:2;
 
         /* These bits define which kinds of sources the device can handle.
            Note: Digital tuner presence is inferred by the