V4L/DVB (7313): pvrusb2: Make LED control into a device-specific attribute

The pvrusb2 driver has used hardcoded logic to control the LED on the
device.  However this is really Hauppauge-specific behavior.  This
change defines a new device attribute for LED control and sets things
up appropriately for Hauppauge devices.
Signed-off-by: Mike Isely <isely@pobox.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>

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

@@ -61,6 +61,7 @@ static const struct pvr2_device_desc pvr2_device_29xxx = {
 		.flag_has_composite = !0,
 		.flag_has_svideo = !0,
 		.signal_routing_scheme = PVR2_ROUTING_SCHEME_HAUPPAUGE,
+		.led_scheme = PVR2_LED_SCHEME_HAUPPAUGE,
 };
 
 
@@ -94,6 +95,7 @@ static const struct pvr2_device_desc pvr2_device_24xxx = {
 		.flag_has_composite = !0,
 		.flag_has_svideo = !0,
 		.signal_routing_scheme = PVR2_ROUTING_SCHEME_HAUPPAUGE,
+		.led_scheme = PVR2_LED_SCHEME_HAUPPAUGE,
 };
 
 
@@ -235,6 +237,7 @@ static const struct pvr2_device_desc pvr2_device_75xxx = {
 		.signal_routing_scheme = PVR2_ROUTING_SCHEME_HAUPPAUGE,
 		.digital_control_scheme = PVR2_DIGITAL_SCHEME_HAUPPAUGE,
 		.default_std_mask = V4L2_STD_NTSC_M,
+		.led_scheme = PVR2_LED_SCHEME_HAUPPAUGE,
 };
 
 

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

@@ -43,6 +43,9 @@ struct pvr2_string_table {
 #define PVR2_DIGITAL_SCHEME_HAUPPAUGE 1
 #define PVR2_DIGITAL_SCHEME_ONAIR 2
 
+#define PVR2_LED_SCHEME_NONE 0
+#define PVR2_LED_SCHEME_HAUPPAUGE 1
+
 /* 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
@@ -70,6 +73,11 @@ struct pvr2_device_desc {
 	   drivers (search for things which touch this field). */
 	unsigned int signal_routing_scheme;
 
+	/* Indicates scheme for controlling device's LED (if any).  The
+	   driver will turn on the LED when streaming is underway.  This
+	   contains one of PVR2_LED_SCHEME_XXX. */
+	unsigned int led_scheme;
+
 	/* Control scheme to use if there is a digital tuner.  This
 	   contains one of PVR2_DIGITAL_SCHEME_XXX.  This is an arbitrary
 	   integer scheme id; its meaning is contained entirely within the

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

@@ -480,8 +480,6 @@ int pvr2_encoder_start(struct pvr2_hdw *hdw)
 	/* unmask some interrupts */
 	pvr2_write_register(hdw, 0x0048, 0xbfffffff);
 
-	pvr2_led_ctrl(hdw, 1);
-
 	pvr2_encoder_vcmd(hdw,CX2341X_ENC_MUTE_VIDEO,1,
 			  hdw->input_val == PVR2_CVAL_INPUT_RADIO ? 1 : 0);
 
@@ -524,8 +522,6 @@ int pvr2_encoder_stop(struct pvr2_hdw *hdw)
 		break;
 	}
 
-	pvr2_led_ctrl(hdw, 0);
-
 	return status;
 }
 

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

@@ -253,6 +253,9 @@ struct pvr2_hdw {
 	   PVR2_STATE_xxxx */
 	unsigned int master_state;
 
+	/* True if device led is currently on */
+	int led_on;
+
 	/* True if states must be re-evaluated */
 	int state_stale;
 

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

@@ -3357,24 +3357,48 @@ static void pvr2_hdw_cmd_modeswitch(struct pvr2_hdw *hdw,int digitalFl)
 }
 
 
-/* Toggle LED */
-int pvr2_led_ctrl(struct pvr2_hdw *hdw, int onoff)
+void pvr2_led_ctrl_hauppauge(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)
+	if (onoff) {
 		pvr2_hdw_gpio_chg_dir(hdw, 0xffffffff, 0x00000481);
-	else
+	} else {
 		pvr2_hdw_gpio_chg_dir(hdw, 0xffffffff, 0x00000401);
-
+	}
 	pvr2_hdw_gpio_chg_out(hdw, 0xffffffff, 0x00000000);
+}
 
-	return 0;
+
+typedef void (*led_method_func)(struct pvr2_hdw *,int);
+
+static led_method_func led_methods[] = {
+	[PVR2_LED_SCHEME_HAUPPAUGE] = pvr2_led_ctrl_hauppauge,
+};
+
+
+/* Toggle LED */
+static void pvr2_led_ctrl(struct pvr2_hdw *hdw,int onoff)
+{
+	unsigned int scheme_id;
+	led_method_func fp;
+
+	if ((!onoff) == (!hdw->led_on)) return;
+
+	hdw->led_on = onoff != 0;
+
+	scheme_id = hdw->hdw_desc->led_scheme;
+	if (scheme_id < ARRAY_SIZE(led_methods)) {
+		fp = led_methods[scheme_id];
+	} else {
+		fp = NULL;
+	}
+
+	if (fp) (*fp)(hdw,onoff);
 }
 
 
@@ -3871,6 +3895,7 @@ static int pvr2_hdw_state_eval(struct pvr2_hdw *hdw)
 			   "Device state change from %s to %s",
 			   pvr2_get_state_name(hdw->master_state),
 			   pvr2_get_state_name(st));
+		pvr2_led_ctrl(hdw,st == PVR2_STATE_RUN);
 		hdw->master_state = st;
 		state_updated = !0;
 		callback_flag = !0;

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

@@ -258,9 +258,6 @@ 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 *);