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usb: phy: phy-am335x: bypass first VBUS sensing for host-only mode

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To prevent VBUS contention, the am335x MUSB phy senses VBUS first before
transitioning to host mode. However, for host-only mode, VBUS could be
directly tied to 5V power rail which could prevent MUSB transitions to
host mode.

This change receives dr_mode of the controller then bypass the first
VBUS sensing for host-only mode, so that MUSB can work in host mode
event if VBUS is tied to 5V.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Bin Liu
2015-12-08 10:31:50 -06:00
committed by Felipe Balbi
parent 5306661eff
commit 59f042f644
4 changed files with 27 additions and 11 deletions
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14
drivers/usb/phy/phy-am335x-control.c
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@@ -4,6 +4,7 @@
#include <linux/of.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/usb/otg.h>
#include "phy-am335x-control.h"
struct am335x_control_usb {
@@ -58,7 +59,8 @@ static void am335x_phy_wkup(struct phy_control *phy_ctrl, u32 id, bool on)
spin_unlock(&usb_ctrl->lock);
}
static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id,
enum usb_dr_mode dr_mode, bool on)
{
struct am335x_control_usb *usb_ctrl;
u32 val;
@@ -80,8 +82,14 @@ static void am335x_phy_power(struct phy_control *phy_ctrl, u32 id, bool on)
val = readl(usb_ctrl->phy_reg + reg);
if (on) {
val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
if (dr_mode == USB_DR_MODE_HOST) {
val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN |
USBPHY_OTGVDET_EN);
val |= USBPHY_OTGSESSEND_EN;
} else {
val &= ~(USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN);
val |= USBPHY_OTGVDET_EN | USBPHY_OTGSESSEND_EN;
}
} else {
val |= USBPHY_CM_PWRDN | USBPHY_OTG_PWRDN;
}