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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>
This commit is contained in:
Rajeshwari Shinde 2012-05-14 05:52:03 +00:00 committed by Marek Vasut
parent 71045da812
commit c48ac11322
3 changed files with 31 additions and 0 deletions
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22
arch/arm/cpu/armv7/exynos/power.c
View File

@ -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);
}

4
arch/arm/include/asm/arch-exynos/power.h
View File

@ -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

5
drivers/usb/host/ehci-exynos.c
View File

@ -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);
}
/*