V4L/DVB (7312): pvrusb2: Indicate streaming status via LED

Most of this originates from Michael Krufky <mkrufky@linuxtv.org>;
these changes move LED control into separate functions.  This is the
first step in new work to make LED control a device-specific attribute.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pvrusb2/pvrusb2-encoder.c

@@ -480,9 +480,7 @@ int pvr2_encoder_start(struct pvr2_hdw *hdw)
 	/* unmask some interrupts */
 	pvr2_write_register(hdw, 0x0048, 0xbfffffff);
 
-	/* change some GPIO data */
-	pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000481);
-	pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000);
+	pvr2_led_ctrl(hdw, 1);
 
 	pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1,
 			  hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0);
@@ -526,11 +524,7 @@ int pvr2_encoder_stop(struct pvr2_hdw *hdw)
 		break;
 	}
 
-	/* change some GPIO data */
-	/* Note: Bit d7 of dir appears to control the LED.  So we shut it
-	   off here. */
-	pvr2_hdw_gpio_chg_dir(hdw,0xffffffff,0x00000401);
-	pvr2_hdw_gpio_chg_out(hdw,0xffffffff,0x00000000);
+	pvr2_led_ctrl(hdw, 0);
 
 	return status;
 }

drivers/media/video/pvrusb2/pvrusb2-hdw.c

@@ -3357,6 +3357,27 @@ static void pvr2_hdw_cmd_modeswitch(struct pvr2_hdw *hdw,int digitalFl)
 }
 
 
+/* Toggle LED */
+int pvr2_led_ctrl(struct pvr2_hdw *hdw, int onoff)
+{
+	/* change some GPIO data
+	 *
+	 * note: bit d7 of dir appears to control the LED,
+	 * so we shut it off here.
+	 *
+	 * FIXME: is this device-specific?
+	 */
+	if (onoff)
+		pvr2_hdw_gpio_chg_dir(hdw, 0xffffffff, 0x00000481);
+	else
+		pvr2_hdw_gpio_chg_dir(hdw, 0xffffffff, 0x00000401);
+
+	pvr2_hdw_gpio_chg_out(hdw, 0xffffffff, 0x00000000);
+
+	return 0;
+}
+
+
 /* Stop / start video stream transport */
 static int pvr2_hdw_cmd_usbstream(struct pvr2_hdw *hdw,int runFl)
 {

drivers/media/video/pvrusb2/pvrusb2-hdw.h

@@ -258,6 +258,9 @@ int pvr2_hdw_cmd_powerup(struct pvr2_hdw *);
 /* suspend */
 int pvr2_hdw_cmd_powerdown(struct pvr2_hdw *);
 
+/* toggle LED */
+int pvr2_led_ctrl(struct pvr2_hdw *hdw, int onoff);
+
 /* Order decoder to reset */
 int pvr2_hdw_cmd_decoder_reset(struct pvr2_hdw *);