V4L/DVB (8822): gspca: Change some subdriver functions for suspend/re…

…sume.

- new function 'init' called on probe and resume
- remove the functions 'open' and 'closed'
- 'stopN' and 'stop0' are optional

Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/gspca/conex.c

@@ -826,8 +826,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	return 0;
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	cx11646_init1(gspca_dev);
 	cx11646_initsize(gspca_dev);
@@ -845,10 +845,6 @@ static void sd_start(struct gspca_dev *gspca_dev)
 	cx11646_jpeg(gspca_dev);
 }
 
-static void sd_stopN(struct gspca_dev *gspca_dev)
-{
-}
-
 static void sd_stop0(struct gspca_dev *gspca_dev)
 {
 	int retry = 50;
@@ -871,10 +867,6 @@ static void sd_stop0(struct gspca_dev *gspca_dev)
 	reg_w_val(gspca_dev, 0x00fc, 0xe0);
 }
 
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			struct gspca_frame *frame,	/* target */
 			__u8 *data,			/* isoc packet */
@@ -998,11 +990,9 @@ static struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
-	.stopN = sd_stopN,
 	.stop0 = sd_stop0,
-	.close = sd_close,
 	.pkt_scan = sd_pkt_scan,
 };
 

drivers/media/video/gspca/etoms.c

@@ -676,8 +676,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	return 0;
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 
@@ -711,14 +711,6 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
 	et_video(gspca_dev, 0);		/* video off */
 }
 
-static void sd_stop0(struct gspca_dev *gspca_dev)
-{
-}
-
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static __u8 Et_getgainG(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
@@ -895,11 +887,9 @@ static struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
-	.stop0 = sd_stop0,
-	.close = sd_close,
 	.pkt_scan = sd_pkt_scan,
 	.dq_callback = do_autogain,
 };

drivers/media/video/gspca/gspca.c

@@ -558,10 +558,12 @@ static void gspca_stream_off(struct gspca_dev *gspca_dev)
 	gspca_dev->streaming = 0;
 	atomic_set(&gspca_dev->nevent, 0);
 	if (gspca_dev->present) {
-		gspca_dev->sd_desc->stopN(gspca_dev);
+		if (gspca_dev->sd_desc->stopN)
+			gspca_dev->sd_desc->stopN(gspca_dev);
 		destroy_urbs(gspca_dev);
 		gspca_set_alt0(gspca_dev);
-		gspca_dev->sd_desc->stop0(gspca_dev);
+		if (gspca_dev->sd_desc->stop0)
+			gspca_dev->sd_desc->stop0(gspca_dev);
 		PDEBUG(D_STREAM, "stream off OK");
 	}
 }
@@ -770,19 +772,7 @@ static int dev_open(struct inode *inode, struct file *file)
 		goto out;
 	}
 
-	/* if not done yet, initialize the sensor */
-	if (gspca_dev->users == 0) {
-		if (mutex_lock_interruptible(&gspca_dev->usb_lock)) {
-			ret = -ERESTARTSYS;
-			goto out;
-		}
-		ret = gspca_dev->sd_desc->open(gspca_dev);
-		mutex_unlock(&gspca_dev->usb_lock);
-		if (ret != 0) {
-			PDEBUG(D_ERR|D_CONF, "init device failed %d", ret);
-			goto out;
-		}
-	} else if (gspca_dev->users > 4) {	/* (arbitrary value) */
+	if (gspca_dev->users > 4) {	/* (arbitrary value) */
 		ret = -EBUSY;
 		goto out;
 	}
@@ -795,6 +785,7 @@ static int dev_open(struct inode *inode, struct file *file)
 	else
 		gspca_dev->vdev.debug &= ~3;
 #endif
+	ret = 0;
 out:
 	mutex_unlock(&gspca_dev->queue_lock);
 	if (ret != 0)
@@ -815,11 +806,6 @@ static int dev_close(struct inode *inode, struct file *file)
 
 	/* if the file did the capture, free the streaming resources */
 	if (gspca_dev->capt_file == file) {
-		mutex_lock(&gspca_dev->usb_lock);
-		if (gspca_dev->streaming)
-			gspca_stream_off(gspca_dev);
-		gspca_dev->sd_desc->close(gspca_dev);
-		mutex_unlock(&gspca_dev->usb_lock);
 		frame_free(gspca_dev);
 		gspca_dev->capt_file = NULL;
 		gspca_dev->memory = GSPCA_MEMORY_NO;
@@ -1747,8 +1733,11 @@ int gspca_dev_probe(struct usb_interface *intf,
 /*	gspca_dev->users = 0;			(done by kzalloc) */
 	gspca_dev->nbufread = 2;
 
-	/* configure the subdriver */
+	/* configure the subdriver and initialize the USB device */
 	ret = gspca_dev->sd_desc->config(gspca_dev, id);
+	if (ret < 0)
+		goto out;
+	ret = gspca_dev->sd_desc->init(gspca_dev);
 	if (ret < 0)
 		goto out;
 	ret = gspca_set_alt0(gspca_dev);
@@ -1825,10 +1814,12 @@ int gspca_suspend(struct usb_interface *intf, pm_message_t message)
 	if (!gspca_dev->streaming)
 		return 0;
 	gspca_dev->frozen = 1;		/* avoid urb error messages */
-	gspca_dev->sd_desc->stopN(gspca_dev);
+	if (gspca_dev->sd_desc->stopN)
+		gspca_dev->sd_desc->stopN(gspca_dev);
 	destroy_urbs(gspca_dev);
 	gspca_set_alt0(gspca_dev);
-	gspca_dev->sd_desc->stop0(gspca_dev);
+	if (gspca_dev->sd_desc->stop0)
+		gspca_dev->sd_desc->stop0(gspca_dev);
 	return 0;
 }
 EXPORT_SYMBOL(gspca_suspend);
@@ -1838,11 +1829,9 @@ int gspca_resume(struct usb_interface *intf)
 	struct gspca_dev *gspca_dev = usb_get_intfdata(intf);
 
 	gspca_dev->frozen = 0;
-	if (gspca_dev->users != 0) {
-		gspca_dev->sd_desc->open(gspca_dev);
-		if (gspca_dev->streaming)
-			return gspca_init_transfer(gspca_dev);
-	}
+	gspca_dev->sd_desc->init(gspca_dev);
+	if (gspca_dev->streaming)
+		return gspca_init_transfer(gspca_dev);
 	return 0;
 }
 EXPORT_SYMBOL(gspca_resume);

drivers/media/video/gspca/gspca.h

@@ -90,15 +90,14 @@ struct sd_desc {
 /* controls */
 	const struct ctrl *ctrls;
 	int nctrls;
-/* operations */
+/* mandatory operations */
 	cam_cf_op config;	/* called on probe */
-	cam_op open;		/* called on open */
+	cam_op init;		/* called on probe and resume */
 	cam_v_op start;		/* called on stream on */
-	cam_v_op stopN;		/* called on stream off - main alt */
-	cam_v_op stop0;		/* called on stream off - alt 0 */
-	cam_v_op close;		/* called on close */
 	cam_pkt_op pkt_scan;
 /* optional operations */
+	cam_v_op stopN;		/* called on stream off - main alt */
+	cam_v_op stop0;		/* called on stream off - alt 0 */
 	cam_v_op dq_callback;	/* called when a frame has been dequeued */
 	cam_jpg_op get_jcomp;
 	cam_jpg_op set_jcomp;

drivers/media/video/gspca/mars.c

@@ -144,8 +144,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	return 0;
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	return 0;
 }
@@ -358,14 +358,6 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
 		PDEBUG(D_ERR, "Camera Stop failed");
 }
 
-static void sd_stop0(struct gspca_dev *gspca_dev)
-{
-}
-
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			struct gspca_frame *frame,	/* target */
 			__u8 *data,			/* isoc packet */
@@ -411,11 +403,9 @@ static const struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
-	.stop0 = sd_stop0,
-	.close = sd_close,
 	.pkt_scan = sd_pkt_scan,
 };
 

drivers/media/video/gspca/ov519.c

@@ -1376,8 +1376,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	return -EBUSY;
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
 
@@ -1877,14 +1877,6 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
 	ov51x_led_control((struct sd *) gspca_dev, 0);
 }
 
-static void sd_stop0(struct gspca_dev *gspca_dev)
-{
-}
-
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			struct gspca_frame *frame,	/* target */
 			__u8 *data,			/* isoc packet */
@@ -2141,11 +2133,9 @@ static const struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
-	.stop0 = sd_stop0,
-	.close = sd_close,
 	.pkt_scan = sd_pkt_scan,
 };
 

drivers/media/video/gspca/pac207.c

@@ -273,8 +273,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	return 0;
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	pac207_write_reg(gspca_dev, 0x41, 0x00);
 				/* Bit_0=Image Format,
@@ -338,15 +338,6 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
 	pac207_write_reg(gspca_dev, 0x0f, 0x00); /* Power Control */
 }
 
-static void sd_stop0(struct gspca_dev *gspca_dev)
-{
-}
-
-/* this function is called at close time */
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static void pac207_do_auto_gain(struct gspca_dev *gspca_dev)
 {
 	struct sd *sd = (struct sd *) gspca_dev;
@@ -532,11 +523,9 @@ static const struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
-	.stop0 = sd_stop0,
-	.close = sd_close,
 	.dq_callback = pac207_do_auto_gain,
 	.pkt_scan = sd_pkt_scan,
 };

drivers/media/video/gspca/pac7311.c

@@ -590,8 +590,8 @@ static void sethvflip(struct gspca_dev *gspca_dev)
 	reg_w(gspca_dev, 0x11, 0x01);
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	return 0;
 }
@@ -691,11 +691,6 @@ static void sd_stop0(struct gspca_dev *gspca_dev)
 	}
 }
 
-/* this function is called at close time */
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static void do_autogain(struct gspca_dev *gspca_dev)
 {
 }
@@ -902,11 +897,10 @@ static struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
 	.stop0 = sd_stop0,
-	.close = sd_close,
 	.pkt_scan = sd_pkt_scan,
 	.dq_callback = do_autogain,
 };

drivers/media/video/gspca/sonixb.c

@@ -799,8 +799,8 @@ static int sd_config(struct gspca_dev *gspca_dev,
 	return 0;
 }
 
-/* this function is called at open time */
-static int sd_open(struct gspca_dev *gspca_dev)
+/* this function is called at probe and resume time */
+static int sd_init(struct gspca_dev *gspca_dev)
 {
 	return 0;
 }
@@ -963,14 +963,6 @@ static void sd_stopN(struct gspca_dev *gspca_dev)
 	reg_w(gspca_dev, 0x01, &ByteSend, 1);
 }
 
-static void sd_stop0(struct gspca_dev *gspca_dev)
-{
-}
-
-static void sd_close(struct gspca_dev *gspca_dev)
-{
-}
-
 static void sd_pkt_scan(struct gspca_dev *gspca_dev,
 			struct gspca_frame *frame,	/* target */
 			unsigned char *data,		/* isoc packet */
@@ -1162,11 +1154,9 @@ static const struct sd_desc sd_desc = {
 	.ctrls = sd_ctrls,
 	.nctrls = ARRAY_SIZE(sd_ctrls),
 	.config = sd_config,
-	.open = sd_open,
+	.init = sd_init,
 	.start = sd_start,
 	.stopN = sd_stopN,
-	.stop0 = sd_stop0,
-	.close = sd_close,
 	.pkt_scan = sd_pkt_scan,
 	.querymenu = sd_querymenu,
 	.dq_callback = do_autogain,