1 files changed, 29 insertions, 3 deletions

diff --git a/drivers/usb/musb/davinci.c b/drivers/usb/musb/davinci.c
index 180d7daa409..e16ff605c45 100644
--- a/drivers/usb/musb/davinci.c
+++ b/drivers/usb/musb/davinci.c
@@ -35,13 +35,14 @@
 #include <mach/hardware.h>
 #include <mach/memory.h>
 #include <mach/gpio.h>
+#include <mach/cputype.h>
 
 #include <asm/mach-types.h>
 
 #include "musb_core.h"
 
 #ifdef CONFIG_MACH_DAVINCI_EVM
-#define GPIO_nVBUS_DRV          87
+#define GPIO_nVBUS_DRV          144
 #endif
 
 #include "davinci.h"
@@ -329,7 +330,6 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
                         mod_timer(&otg_workaround, jiffies + POLL_SECONDS * HZ);
                         WARNING("VBUS error workaround (delay coming)\n");
                 } else if (is_host_enabled(musb) && drvvbus) {
-                        musb->is_active = 1;
                         MUSB_HST_MODE(musb);
                         musb->xceiv->default_a = 1;
                         musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;
@@ -343,7 +343,9 @@ static irqreturn_t davinci_interrupt(int irq, void *__hci)
                         portstate(musb->port1_status &= ~USB_PORT_STAT_POWER);
                 }
 
-                /* NOTE:  this must complete poweron within 100 msec */
+                /* NOTE:  this must complete poweron within 100 msec
+                 * (OTG_TIME_A_WAIT_VRISE) but we don't check for that.
+                 */
                 davinci_source_power(musb, drvvbus, 0);
                 DBG(2, "VBUS %s (%s)%s, devctl %02x\n",
                                 drvvbus ? "on" : "off",
@@ -411,6 +413,21 @@ int __init musb_platform_init(struct musb *musb)
                 __raw_writel(phy_ctrl, USB_PHY_CTRL);
         }
 
+        /* On dm355, the default-A state machine needs DRVVBUS control.
+         * If we won't be a host, there's no need to turn it on.
+         */
+        if (cpu_is_davinci_dm355()) {
+                u32     deepsleep = __raw_readl(DM355_DEEPSLEEP);
+
+                if (is_host_enabled(musb)) {
+                        deepsleep &= ~DRVVBUS_OVERRIDE;
+                } else {
+                        deepsleep &= ~DRVVBUS_FORCE;
+                        deepsleep |= DRVVBUS_OVERRIDE;
+                }
+                __raw_writel(deepsleep, DM355_DEEPSLEEP);
+        }
+
         /* reset the controller */
         musb_writel(tibase, DAVINCI_USB_CTRL_REG, 0x1);
 
@@ -437,6 +454,15 @@ int musb_platform_exit(struct musb *musb)
         if (is_host_enabled(musb))
                 del_timer_sync(&otg_workaround);
 
+        /* force VBUS off */
+        if (cpu_is_davinci_dm355()) {
+                u32     deepsleep = __raw_readl(DM355_DEEPSLEEP);
+
+                deepsleep &= ~DRVVBUS_FORCE;
+                deepsleep |= DRVVBUS_OVERRIDE;
+                __raw_writel(deepsleep, DM355_DEEPSLEEP);
+        }
+
         davinci_source_power(musb, 0 /*off*/, 1);
 
         /* delay, to avoid problems with module reload */