From c48ac11322800d6492ea31f42ca53301a444742a Mon Sep 17 00:00:00 2001
From: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Date: Mon, 14 May 2012 05:52:03 +0000
Subject: [PATCH] EXYNOS: Add power Enable/Disable for USB-EHCI
This patch adds functions to enable/disable the power of USB
host controller for EXYNOS5.
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Signed-off-by: Che-Liang Chiou <clchiou@chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
---
arch/arm/cpu/armv7/exynos/power.c | 22 ++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/power.h | 4 ++++
drivers/usb/host/ehci-exynos.c | 5 +++++
3 files changed, 31 insertions(+)
diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index c765304fd5..4116781a36 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -52,3 +52,25 @@ void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable)
if (cpu_is_exynos4())
exynos4_mipi_phy_control(dev_index, enable);
}
+
+void exynos5_set_usbhost_phy_ctrl(unsigned int enable)
+{
+ struct exynos5_power *power =
+ (struct exynos5_power *)samsung_get_base_power();
+
+ if (enable) {
+ /* Enabling USBHOST_PHY */
+ setbits_le32(&power->usbhost_phy_control,
+ POWER_USB_HOST_PHY_CTRL_EN);
+ } else {
+ /* Disabling USBHOST_PHY */
+ clrbits_le32(&power->usbhost_phy_control,
+ POWER_USB_HOST_PHY_CTRL_EN);
+ }
+}
+
+void set_usbhost_phy_ctrl(unsigned int enable)
+{
+ if (cpu_is_exynos5())
+ exynos5_set_usbhost_phy_ctrl(enable);
+}
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index 4236bebdf7..e5467e242d 100644
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/arch/arm/include/asm/arch-exynos/power.h
@@ -855,4 +855,8 @@ void set_mipi_phy_ctrl(unsigned int dev_index, unsigned int enable);
#define EXYNOS_MIPI_PHY_SRESETN (1 << 1)
#define EXYNOS_MIPI_PHY_MRESETN (1 << 2)
+void set_usbhost_phy_ctrl(unsigned int enable);
+
+#define POWER_USB_HOST_PHY_CTRL_EN (1 << 0)
+#define POWER_USB_HOST_PHY_CTRL_DISABLE (0 << 0)
#endif
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 90d66d3aa3..a71b3977d8 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -25,6 +25,7 @@
#include <asm/arch/cpu.h>
#include <asm/arch/ehci.h>
#include <asm/arch/system.h>
+#include <asm/arch/power.h>
#include "ehci.h"
#include "ehci-core.h"
@@ -33,6 +34,8 @@ static void setup_usb_phy(struct exynos_usb_phy *usb)
{
set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN);
+ set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_EN);
+
clrbits_le32(&usb->usbphyctrl0,
HOST_CTRL0_FSEL_MASK |
HOST_CTRL0_COMMONON_N |
@@ -73,6 +76,8 @@ static void reset_usb_phy(struct exynos_usb_phy *usb)
HOST_CTRL0_SIDDQ |
HOST_CTRL0_FORCESUSPEND |
HOST_CTRL0_FORCESLEEP);
+
+ set_usbhost_phy_ctrl(POWER_USB_HOST_PHY_CTRL_DISABLE);
}
/*
--
2.39.5