usb: musb: make multipoint optional

The multipoint handling under MUSB is optional, and some parts (like the
Blackfin processor) do not implement support for it.

Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Cliff Cai <cliff.cai@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Remy Bohmer <linux@bohmer.net>

drivers/usb/musb/musb_hcd.c

@@ -402,11 +402,13 @@ static void config_hub_port(struct usb_device *dev, u8 ep)
 		if (dev->parent->children[chid] == dev)
 			break;
 
+#ifndef MUSB_NO_MULTIPOINT
 	/* configure the hub address and the port address */
 	writeb(hub, &musbr->tar[ep].txhubaddr);
 	writeb((chid + 1), &musbr->tar[ep].txhubport);
 	writeb(hub, &musbr->tar[ep].rxhubaddr);
 	writeb((chid + 1), &musbr->tar[ep].rxhubport);
+#endif
 }
 
 /*
@@ -415,7 +417,9 @@ static void config_hub_port(struct usb_device *dev, u8 ep)
 int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 			int len, struct devrequest *setup)
 {
+#ifndef MUSB_NO_MULTIPOINT
 	int devnum = usb_pipedevice(pipe);
+#endif
 	u16 csr;
 	u8  devspeed;
 
@@ -423,9 +427,11 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 	writeb(MUSB_CONTROL_EP, &musbr->index);
 	csr = readw(&musbr->txcsr);
 
+#ifndef MUSB_NO_MULTIPOINT
 	/* target addr and (for multipoint) hub addr/port */
 	writeb(devnum, &musbr->tar[MUSB_CONTROL_EP].txfuncaddr);
 	writeb(devnum, &musbr->tar[MUSB_CONTROL_EP].rxfuncaddr);
+#endif
 
 	/* configure the hub address and the port number as required */
 	devspeed = get_dev_speed(dev);
@@ -435,10 +441,12 @@ int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
 		writeb(devspeed << 6, &musbr->txtype);
 	} else {
 		writeb(musb_cfg.musb_speed << 6, &musbr->txtype);
+#ifndef MUSB_NO_MULTIPOINT
 		writeb(0, &musbr->tar[MUSB_CONTROL_EP].txhubaddr);
 		writeb(0, &musbr->tar[MUSB_CONTROL_EP].txhubport);
 		writeb(0, &musbr->tar[MUSB_CONTROL_EP].rxhubaddr);
 		writeb(0, &musbr->tar[MUSB_CONTROL_EP].rxhubport);
+#endif
 	}
 
 	/* Control transfer setup phase */
@@ -497,7 +505,9 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 {
 	int dir_out = usb_pipeout(pipe);
 	int ep = usb_pipeendpoint(pipe);
+#ifndef MUSB_NO_MULTIPOINT
 	int devnum = usb_pipedevice(pipe);
+#endif
 	u8  type;
 	u16 csr;
 	u32 txlen = 0;
@@ -507,11 +517,13 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 	/* select bulk endpoint */
 	writeb(MUSB_BULK_EP, &musbr->index);
 
+#ifndef MUSB_NO_MULTIPOINT
 	/* write the address of the device */
 	if (dir_out)
 		writeb(devnum, &musbr->tar[MUSB_BULK_EP].txfuncaddr);
 	else
 		writeb(devnum, &musbr->tar[MUSB_BULK_EP].rxfuncaddr);
+#endif
 
 	/* configure the hub address and the port number as required */
 	devspeed = get_dev_speed(dev);
@@ -524,6 +536,7 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 		 */
 		config_hub_port(dev, MUSB_BULK_EP);
 	} else {
+#ifndef MUSB_NO_MULTIPOINT
 		if (dir_out) {
 			writeb(0, &musbr->tar[MUSB_BULK_EP].txhubaddr);
 			writeb(0, &musbr->tar[MUSB_BULK_EP].txhubport);
@@ -531,6 +544,7 @@ int submit_bulk_msg(struct usb_device *dev, unsigned long pipe,
 			writeb(0, &musbr->tar[MUSB_BULK_EP].rxhubaddr);
 			writeb(0, &musbr->tar[MUSB_BULK_EP].rxhubport);
 		}
+#endif
 		devspeed = musb_cfg.musb_speed;
 	}
 
@@ -696,7 +710,9 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe,
 {
 	int dir_out = usb_pipeout(pipe);
 	int ep = usb_pipeendpoint(pipe);
+#ifndef MUSB_NO_MULTIPOINT
 	int devnum = usb_pipedevice(pipe);
+#endif
 	u8  type;
 	u16 csr;
 	u32 txlen = 0;
@@ -706,11 +722,13 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe,
 	/* select interrupt endpoint */
 	writeb(MUSB_INTR_EP, &musbr->index);
 
+#ifndef MUSB_NO_MULTIPOINT
 	/* write the address of the device */
 	if (dir_out)
 		writeb(devnum, &musbr->tar[MUSB_INTR_EP].txfuncaddr);
 	else
 		writeb(devnum, &musbr->tar[MUSB_INTR_EP].rxfuncaddr);
+#endif
 
 	/* configure the hub address and the port number as required */
 	devspeed = get_dev_speed(dev);
@@ -723,6 +741,7 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe,
 		 */
 		config_hub_port(dev, MUSB_INTR_EP);
 	} else {
+#ifndef MUSB_NO_MULTIPOINT
 		if (dir_out) {
 			writeb(0, &musbr->tar[MUSB_INTR_EP].txhubaddr);
 			writeb(0, &musbr->tar[MUSB_INTR_EP].txhubport);
@@ -730,6 +749,7 @@ int submit_int_msg(struct usb_device *dev, unsigned long pipe,
 			writeb(0, &musbr->tar[MUSB_INTR_EP].rxhubaddr);
 			writeb(0, &musbr->tar[MUSB_INTR_EP].rxhubport);
 		}
+#endif
 		devspeed = musb_cfg.musb_speed;
 	}