[media] mantis: add remote control support

The embedded UART is apparently used to receive decoded IR (RC5?) codes.
Forward these scan codes to the RC framework and (where known) add
corresponding mapping tables to translate them into regular keys.

This patch has been tested on a TechniSat CableStar HD2. The mappings of other
rc-maps were taken from Christoph Pinkl's patch
(http://patchwork.linuxtv.org/patch/7217/) and the s2-liplianin repository. The
major difference to Christoph's patch is a reworked interrupt handling of the
UART because the RX interrupt is apparently level triggered and requires
masking until the FIFO is read by the UART worker.

Signed-off-by: Jan Klötzke <jan@kloetzke.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

1 files changed, 29 insertions, 4 deletions

diff --git a/drivers/media/pci/mantis/mantis_common.h b/drivers/media/pci/mantis/mantis_common.h
index 8ff448b..d48778a 100644
--- a/drivers/media/pci/mantis/mantis_common.h
+++ b/drivers/media/pci/mantis/mantis_common.h
@@ -25,6 +25,7 @@
 #include <linux/mutex.h>
 #include <linux/workqueue.h>
 
+#include "mantis_reg.h"
 #include "mantis_uart.h"
 
 #include "mantis_link.h"
@@ -68,12 +69,13 @@
 #define TECHNISAT		0x1ae4
 #define TERRATEC		0x153b
 
-#define MAKE_ENTRY(__subven, __subdev, __configptr) {			\
+#define MAKE_ENTRY(__subven, __subdev, __configptr, __rc) {		\
 		.vendor		= TWINHAN_TECHNOLOGIES,			\
 		.device		= MANTIS,				\
 		.subvendor	= (__subven),				\
 		.subdevice	= (__subdev),				\
-		.driver_data	= (unsigned long) (__configptr)		\
+		.driver_data	= (unsigned long)			\
+			&(struct mantis_pci_drvdata){__configptr, __rc}	\
 }
 
 enum mantis_i2c_mode {
@@ -101,6 +103,11 @@ struct mantis_hwconfig {
 	enum mantis_i2c_mode	i2c_mode;
 };
 
+struct mantis_pci_drvdata {
+	struct mantis_hwconfig *hwconfig;
+	char *rc_map_name;
+};
+
 struct mantis_pci {
 	unsigned int		verbose;
 
@@ -131,6 +138,7 @@ struct mantis_pci {
 	dma_addr_t		risc_dma;
 
 	struct tasklet_struct	tasklet;
+	spinlock_t		intmask_lock;
 
 	struct i2c_adapter	adapter;
 	int			i2c_rc;
@@ -165,15 +173,32 @@ struct mantis_pci {
 
 	struct mantis_ca	*mantis_ca;
 
-	wait_queue_head_t	uart_wq;
 	struct work_struct	uart_work;
-	spinlock_t		uart_lock;
 
 	struct rc_dev		*rc;
 	char			input_name[80];
 	char			input_phys[80];
+	char			*rc_map_name;
 };
 
 #define MANTIS_HIF_STATUS	(mantis->gpio_status)
 
+static inline void mantis_mask_ints(struct mantis_pci *mantis, u32 mask)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mantis->intmask_lock, flags);
+	mmwrite(mmread(MANTIS_INT_MASK) & ~mask, MANTIS_INT_MASK);
+	spin_unlock_irqrestore(&mantis->intmask_lock, flags);
+}
+
+static inline void mantis_unmask_ints(struct mantis_pci *mantis, u32 mask)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&mantis->intmask_lock, flags);
+	mmwrite(mmread(MANTIS_INT_MASK) | mask, MANTIS_INT_MASK);
+	spin_unlock_irqrestore(&mantis->intmask_lock, flags);
+}
+
 #endif /* __MANTIS_COMMON_H */