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[5/8] musb: Add 'extvbus' in musb_hdrc_board_data

Message ID 1258470596-24321-6-git-send-email-ajay.gupta@ti.com (mailing list archive)
State Changes Requested
Headers show

Commit Message

Ajay Kumar Gupta Nov. 17, 2009, 3:09 p.m. UTC 
None
diff mbox

Patch

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 818ccda..c0a6760 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -2027,15 +2027,25 @@  bad_config:
 	/* host side needs more setup */
 	if (is_host_enabled(musb)) {
 		struct usb_hcd	*hcd = musb_to_hcd(musb);
+		u8 busctl;
 
 		otg_set_host(musb->xceiv, &hcd->self);
 
 		if (is_otg_enabled(musb))
 			hcd->self.otg_port = 1;
 		musb->xceiv->host = &hcd->self;
-		if (plat->board_data)
+		if (plat->board_data) {
 			hcd->power_budget =
 				2 * (plat->board_data->power ? : 250);
+			/* program PHY to use external vBus if required */
+			if (plat->board_data->extvbus) {
+				busctl = musb_readb(musb->mregs,
+						MUSB_ULPI_BUSCONTROL);
+				busctl |= ULPI_USE_EXTVBUS;
+				musb_writeb(musb->mregs,
+						MUSB_ULPI_BUSCONTROL, busctl);
+			}
+		}
 	}
 
 	/* For the host-only role, we can activate right away.
diff --git a/drivers/usb/musb/musb_regs.h b/drivers/usb/musb/musb_regs.h
index cc1d71b..a0314df 100644
--- a/drivers/usb/musb/musb_regs.h
+++ b/drivers/usb/musb/musb_regs.h
@@ -72,6 +72,10 @@ 
 #define MUSB_DEVCTL_HR		0x02
 #define MUSB_DEVCTL_SESSION	0x01
 
+/* ULPI VBUSCONTROL */
+#define ULPI_USE_EXTVBUS	0x01
+#define ULPI_USE_EXTVBUSIND	0x02
+
 /* TESTMODE */
 #define MUSB_TEST_FORCE_HOST	0x80
 #define MUSB_TEST_FIFO_ACCESS	0x40
@@ -246,6 +250,7 @@ 
 
 /* REVISIT: vctrl/vstatus: optional vendor utmi+phy register at 0x68 */
 #define MUSB_HWVERS		0x6C	/* 8 bit */
+#define MUSB_ULPI_BUSCONTROL	0x70	/* 8 bit */
 
 #define MUSB_EPINFO		0x78	/* 8 bit */
 #define MUSB_RAMINFO		0x79	/* 8 bit */
diff --git a/include/linux/usb/musb.h b/include/linux/usb/musb.h
index 6e1426c..45fd7d1 100644
--- a/include/linux/usb/musb.h
+++ b/include/linux/usb/musb.h
@@ -33,7 +33,8 @@  struct musb_hdrc_board_data {
 	u8	power;
 	/* (HOST or OTG) msec/2 after VBUS on till power good */
 	u8		potpgt;
-
+	/* flag to program PHY to use external Vbus */
+	unsigned	extvbus:1;
 };
 
 struct musb_hdrc_config {