[v2,4/9,media] mceusb: issue device resume cmd when needed

Commit Message

Jarod Wilson July 18, 2011, 7:54 p.m. UTC

According to MS docs, the device firmware may halt after receiving an
unknown instruction, but that it should be possible to tell the firmware
to continue running by simply sending a device resume command. So lets
do that.

v2: use msleep instead of mdelay per Mauro's suggestion

Signed-off-by: Jarod Wilson <[e-mail]>
---
 drivers/media/rc/mceusb.c |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

Patch

diff --git a/drivers/media/rc/mceusb.c b/drivers/media/rc/mceusb.c
index ab074a3..f1fc11d 100644
--- a/drivers/media/rc/mceusb.c
+++ b/drivers/media/rc/mceusb.c
@@ -436,6 +436,8 @@  struct mceusb_dev {
 	char name[128];
 	char phys[64];
 	enum mceusb_model_type model;
+
+	bool need_reset;	/* flag to issue a device resume cmd */
 };
 
 /* MCE Device Command Strings, generally a port and command pair */
@@ -735,6 +737,14 @@  static void mce_request_packet(struct mceusb_dev *ir, unsigned char *data,
 
 static void mce_async_out(struct mceusb_dev *ir, unsigned char *data, int size)
 {
+	int rsize = sizeof(DEVICE_RESUME);
+
+	if (ir->need_reset) {
+		ir->need_reset = false;
+		mce_request_packet(ir, DEVICE_RESUME, rsize, MCEUSB_TX);
+		msleep(10);
+	}
+
 	mce_request_packet(ir, data, size, MCEUSB_TX);
 	msleep(10);
 }
@@ -911,6 +921,9 @@  static void mceusb_handle_command(struct mceusb_dev *ir, int index)
 	case MCE_RSP_EQIRRXPORTEN:
 		ir->learning_enabled = ((hi & 0x02) == 0x02);
 		break;
+	case MCE_RSP_CMD_ILLEGAL:
+		ir->need_reset = true;
+		break;
 	default:
 		break;
 	}