This patch adds a function to set usb host mode to USB 2.0 HOST Link for EXYNOS5
Signed-off-by: Rajeshwari Shinde rajeshwari.s@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 |