This patch adds a function to set usb host mode to USB 2.0 HOST Link
for EXYNOS5
Signed-off-by: Rajeshwari Shinde <rajeshwar...@samsung.com>
---
Changes for v2:
- Setting SYSREG registers was moved to System.c
- This setting of SYSREG registers was moved to seperate patch
Changes for v3:
- Placed setting usbhost function to top of set_system_display
- Renamed enable_usbhost_mode and exynos5_enable_usbhost_mode to
set_usbhost_mode and exynos5_set_usbhost_mode.
This patch is based on:
USB: EXYNOS: Add ehci support.patch
arch/arm/cpu/armv7/exynos/system.c | 22 ++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/system.h | 3 +++
drivers/usb/host/ehci-exynos.c | 3 +++
3 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/arch/arm/cpu/armv7/exynos/system.c
b/arch/arm/cpu/armv7/exynos/system.c
index 6c34730..cc6ee03 100644
--- a/arch/arm/cpu/armv7/exynos/system.c
+++ b/arch/arm/cpu/armv7/exynos/system.c
@@ -25,6 +25,28 @@
#include <asm/io.h>
#include <asm/arch/system.h>
+static void exynos5_set_usbhost_mode(unsigned int mode)
+{
+ struct exynos5_sysreg *sysreg =
+ (struct exynos5_sysreg *)samsung_get_base_sysreg();
+ unsigned int phy_cfg;
+
+ /* Setting USB20PHY_CONFIG register to USB 2.0 HOST link */
+ if (mode == USB20_PHY_CFG_HOST_LINK_EN) {
+ setbits_le32(&sysreg->usb20phy_cfg,
+ USB20_PHY_CFG_HOST_LINK_EN);
+ } else {
+ clrbits_le32(&sysreg->usb20phy_cfg,
+ USB20_PHY_CFG_HOST_LINK_EN);
+ }
+}
+
+void set_usbhost_mode(unsigned int mode)
+{
+ if (cpu_is_exynos5())
+ exynos5_set_usbhost_mode(mode);
+}
+
static void exynos4_set_system_display(void)
{
struct exynos4_sysreg *sysreg =
diff --git a/arch/arm/include/asm/arch-exynos/system.h
b/arch/arm/include/asm/arch-exynos/system.h
index c1d880f..42e1d21 100644
--- a/arch/arm/include/asm/arch-exynos/system.h
+++ b/arch/arm/include/asm/arch-exynos/system.h
@@ -49,6 +49,9 @@ struct exynos5_sysreg {
};
#endif
+#define USB20_PHY_CFG_HOST_LINK_EN (1 << 0)
+
+void set_usbhost_mode(unsigned int mode);
void set_system_display_ctrl(void);
#endif /* _EXYNOS4_SYSTEM_H */
diff --git a/drivers/usb/host/ehci-exynos.c b/drivers/usb/host/ehci-exynos.c
index 3830c43..90d66d3 100644
--- a/drivers/usb/host/ehci-exynos.c
+++ b/drivers/usb/host/ehci-exynos.c
@@ -24,12 +24,15 @@
#include <usb.h>
#include <asm/arch/cpu.h>
#include <asm/arch/ehci.h>
+#include <asm/arch/system.h>
#include "ehci.h"
#include "ehci-core.h"
/* Setup the EHCI host controller. */
static void setup_usb_phy(struct exynos_usb_phy *usb)
{
+ set_usbhost_mode(USB20_PHY_CFG_HOST_LINK_EN);
+
clrbits_le32(&usb->usbphyctrl0,
HOST_CTRL0_FSEL_MASK |
HOST_CTRL0_COMMONON_N |
--
1.7.4.4
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