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path: root/drivers/media/usb/au0828/au0828-input.c
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Diffstat (limited to 'drivers/media/usb/au0828/au0828-input.c')
-rw-r--r--drivers/media/usb/au0828/au0828-input.c36
1 files changed, 28 insertions, 8 deletions
diff --git a/drivers/media/usb/au0828/au0828-input.c b/drivers/media/usb/au0828/au0828-input.c
index fd0d3a90..63995f9 100644
--- a/drivers/media/usb/au0828/au0828-input.c
+++ b/drivers/media/usb/au0828/au0828-input.c
@@ -17,6 +17,8 @@
GNU General Public License for more details.
*/
+#include "au0828.h"
+
#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
@@ -25,7 +27,9 @@
#include <linux/slab.h>
#include <media/rc-core.h>
-#include "au0828.h"
+static int disable_ir;
+module_param(disable_ir, int, 0444);
+MODULE_PARM_DESC(disable_ir, "disable infrared remote support");
struct au0828_rc {
struct au0828_dev *dev;
@@ -90,14 +94,19 @@ static int au8522_rc_read(struct au0828_rc *ir, u16 reg, int val,
static int au8522_rc_andor(struct au0828_rc *ir, u16 reg, u8 mask, u8 value)
{
int rc;
- char buf;
+ char buf, oldbuf;
rc = au8522_rc_read(ir, reg, -1, &buf, 1);
if (rc < 0)
return rc;
+ oldbuf = buf;
buf = (buf & ~mask) | (value & mask);
+ /* Nothing to do, just return */
+ if (buf == oldbuf)
+ return 0;
+
return au8522_rc_write(ir, reg, buf);
}
@@ -122,8 +131,11 @@ static int au0828_get_key_au8522(struct au0828_rc *ir)
/* Check IR int */
rc = au8522_rc_read(ir, 0xe1, -1, buf, 1);
- if (rc < 0 || !(buf[0] & (1 << 4)))
+ if (rc < 0 || !(buf[0] & (1 << 4))) {
+ /* Be sure that IR is enabled */
+ au8522_rc_set(ir, 0xe0, 1 << 4);
return 0;
+ }
/* Something arrived. Get the data */
rc = au8522_rc_read(ir, 0xe3, 0x11, buf, sizeof(buf));
@@ -135,8 +147,6 @@ static int au0828_get_key_au8522(struct au0828_rc *ir)
/* Disable IR */
au8522_rc_clear(ir, 0xe0, 1 << 4);
- usleep_range(45000, 46000);
-
/* Enable IR */
au8522_rc_set(ir, 0xe0, 1 << 4);
@@ -243,10 +253,10 @@ static void au0828_rc_stop(struct rc_dev *rc)
{
struct au0828_rc *ir = rc->priv;
+ cancel_delayed_work_sync(&ir->work);
+
/* Disable IR */
au8522_rc_clear(ir, 0xe0, 1 << 4);
-
- cancel_delayed_work_sync(&ir->work);
}
static int au0828_probe_i2c_ir(struct au0828_dev *dev)
@@ -273,7 +283,7 @@ int au0828_rc_register(struct au0828_dev *dev)
int err = -ENOMEM;
u16 i2c_rc_dev_addr = 0;
- if (!dev->board.has_ir_i2c)
+ if (!dev->board.has_ir_i2c || disable_ir)
return 0;
i2c_rc_dev_addr = au0828_probe_i2c_ir(dev);
@@ -368,8 +378,13 @@ int au0828_rc_suspend(struct au0828_dev *dev)
if (!ir)
return 0;
+ pr_info("Stopping RC\n");
+
cancel_delayed_work_sync(&ir->work);
+ /* Disable IR */
+ au8522_rc_clear(ir, 0xe0, 1 << 4);
+
return 0;
}
@@ -380,6 +395,11 @@ int au0828_rc_resume(struct au0828_dev *dev)
if (!ir)
return 0;
+ pr_info("Restarting RC\n");
+
+ /* Enable IR */
+ au8522_rc_set(ir, 0xe0, 1 << 4);
+
schedule_delayed_work(&ir->work, msecs_to_jiffies(ir->polling));
return 0;

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