Re: [PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0 controller

2013-02-04 Thread Vivek Gautam 
Hi Kukjin,


On Wed, Jan 30, 2013 at 11:31 AM, Kukjin Kim  wrote:
> Vivek Gautam wrote:
>>
>> Adding PHY driver support for USB 3.0 controller for Samsung's
>> SoCs.
>>
>> Signed-off-by: Vivek Gautam 
>> ---
>>
>> Changes from v3:
>>  - Making SAMSUNG_USB3PHY dependent on SAMSUNG_USBPHY.
>>  - Adding USB_DWC3 to dependencies of SAMSUNG_USB2PHY since
>>dwc3 controller also looks for USB2 type PHY.
>>
>>  drivers/usb/phy/Kconfig  |   11 +-
>>  drivers/usb/phy/Makefile |1 +
>>  drivers/usb/phy/samsung-usb3.c   |  349
>> ++
>>  drivers/usb/phy/samsung-usbphy.h |   81 +
>>  4 files changed, 441 insertions(+), 1 deletions(-)
>>  create mode 100644 drivers/usb/phy/samsung-usb3.c
>>
>> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
>> index cc0d230..9325a95 100644
>> --- a/drivers/usb/phy/Kconfig
>> +++ b/drivers/usb/phy/Kconfig
>> @@ -52,14 +52,23 @@ config SAMSUNG_USBPHY
>>   help
>> Enable this to support Samsung USB phy controllers for Samsung
>> SoCs.
>> +   Further enable USB 2.0 type PHY or USB 3.0 type PHY as required
>> +   for USB controllers in use.
>>
>>  if SAMSUNG_USBPHY
>>
>>  config SAMSUNG_USB2PHY
>>   bool "Samsung USB 2.0 PHY controller Driver"
>> - depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
>> USB_OHCI_EXYNOS
>> + depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
>> USB_OHCI_EXYNOS || USB_DWC3
>>   help
>> Enable this to support Samsung USB 2.0 (High Speed) phy controller
>> for Samsung SoCs.
>>
>> +config SAMSUNG_USB3PHY
>> + bool "Samsung USB 3.0 PHY controller Driver"
>> + depends on USB_DWC3
>> + help
>> +   Enable this to support Samsung USB 3.0 (Super Speed) phy
>> controller
>> +   for samsung SoCs.
>> +
>>  endif
>
> It mean, when USB_DWC3 is selected, we can select only one USB2PHY or
> USB3PHY?
>

Actually, DWC3 expects both USB2PHY and USB3PHY, so went this way.
But this seems bad :-(
Will remove these dependencies as suggested by Felipe also.

> [...]
>
>> +#ifdef CONFIG_OF
>> +static const struct of_device_id samsung_usbphy_dt_match[] = {
>> + {
>> + .compatible = "samsung,exynos5250-usb3-phy",
>> + .data = &usb3_phy_exynos5
>> + },
>> + {},
>> +};
>> +MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
>> +#endif
>> +
>> +static struct platform_device_id samsung_usbphy_driver_ids[] = {
>> + {
>> + .name   = "exynos5250-usb3-phy",
>
> According to the name of file, exynos5250-usb3phy? Just it is imho...
>

Ok, sure will amend this.

>> + .driver_data= (unsigned long)&usb3_phy_exynos5,
>> + },
>> + {},
>> +};
>> +
>> +MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);
>> +
>> +static struct platform_driver samsung_usb3_phy_driver = {
>> + .probe  = samsung_usb3_phy_probe,
>> + .remove = samsung_usb3_phy_remove,
>> + .id_table   = samsung_usbphy_driver_ids,
>> + .driver = {
>> + .name   = "samsung-usb3-phy",
>> + .owner  = THIS_MODULE,
>> + .of_match_table =
>> of_match_ptr(samsung_usbphy_dt_match),
>> + },
>> +};
>> +
>> +module_platform_driver(samsung_usb3_phy_driver);
>> +
>> +MODULE_DESCRIPTION("Samsung USB 3.0 phy controller");
>> +MODULE_AUTHOR("Vivek Gautam ");
>> +MODULE_LICENSE("GPL");
>> +MODULE_ALIAS("platform:samsung-usb3-phy");
>
> I want you to use same naming rule.
>

Sure.


-- 
Thanks & Regards
Vivek
___
devicetree-discuss mailing list
devicetree-discuss@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/devicetree-discuss

Re: [PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0 controller

2013-01-30 Thread Felipe Balbi 
On Tue, Jan 29, 2013 at 10:01:52PM -0800, Kukjin Kim wrote:
> Vivek Gautam wrote:
> > 
> > Adding PHY driver support for USB 3.0 controller for Samsung's
> > SoCs.
> > 
> > Signed-off-by: Vivek Gautam 
> > ---
> > 
> > Changes from v3:
> >  - Making SAMSUNG_USB3PHY dependent on SAMSUNG_USBPHY.
> >  - Adding USB_DWC3 to dependencies of SAMSUNG_USB2PHY since
> >dwc3 controller also looks for USB2 type PHY.
> > 
> >  drivers/usb/phy/Kconfig  |   11 +-
> >  drivers/usb/phy/Makefile |1 +
> >  drivers/usb/phy/samsung-usb3.c   |  349
> > ++
> >  drivers/usb/phy/samsung-usbphy.h |   81 +
> >  4 files changed, 441 insertions(+), 1 deletions(-)
> >  create mode 100644 drivers/usb/phy/samsung-usb3.c
> > 
> > diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> > index cc0d230..9325a95 100644
> > --- a/drivers/usb/phy/Kconfig
> > +++ b/drivers/usb/phy/Kconfig
> > @@ -52,14 +52,23 @@ config SAMSUNG_USBPHY
> > help
> >   Enable this to support Samsung USB phy controllers for Samsung
> >   SoCs.
> > + Further enable USB 2.0 type PHY or USB 3.0 type PHY as required
> > + for USB controllers in use.
> > 
> >  if SAMSUNG_USBPHY
> > 
> >  config SAMSUNG_USB2PHY
> > bool "Samsung USB 2.0 PHY controller Driver"
> > -   depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
> > USB_OHCI_EXYNOS
> > +   depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
> > USB_OHCI_EXYNOS || USB_DWC3
> > help
> >   Enable this to support Samsung USB 2.0 (High Speed) phy controller
> >   for Samsung SoCs.
> > 
> > +config SAMSUNG_USB3PHY
> > +   bool "Samsung USB 3.0 PHY controller Driver"
> > +   depends on USB_DWC3
> > +   help
> > + Enable this to support Samsung USB 3.0 (Super Speed) phy
> > controller
> > + for samsung SoCs.
> > +
> >  endif
> 
> It mean, when USB_DWC3 is selected, we can select only one USB2PHY or
> USB3PHY?

right, not sure that's a wise idea. It makes enabling USB support
trickier than it needs to be. How about just dropping all dependencies
if it compiles cleanly on all arches ?

-- 
balbi


signature.asc
Description: Digital signature
___
devicetree-discuss mailing list
devicetree-discuss@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/devicetree-discuss

RE: [PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0 controller

2013-01-29 Thread Kukjin Kim 
Vivek Gautam wrote:
> 
> Adding PHY driver support for USB 3.0 controller for Samsung's
> SoCs.
> 
> Signed-off-by: Vivek Gautam 
> ---
> 
> Changes from v3:
>  - Making SAMSUNG_USB3PHY dependent on SAMSUNG_USBPHY.
>  - Adding USB_DWC3 to dependencies of SAMSUNG_USB2PHY since
>dwc3 controller also looks for USB2 type PHY.
> 
>  drivers/usb/phy/Kconfig  |   11 +-
>  drivers/usb/phy/Makefile |1 +
>  drivers/usb/phy/samsung-usb3.c   |  349
> ++
>  drivers/usb/phy/samsung-usbphy.h |   81 +
>  4 files changed, 441 insertions(+), 1 deletions(-)
>  create mode 100644 drivers/usb/phy/samsung-usb3.c
> 
> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> index cc0d230..9325a95 100644
> --- a/drivers/usb/phy/Kconfig
> +++ b/drivers/usb/phy/Kconfig
> @@ -52,14 +52,23 @@ config SAMSUNG_USBPHY
>   help
> Enable this to support Samsung USB phy controllers for Samsung
> SoCs.
> +   Further enable USB 2.0 type PHY or USB 3.0 type PHY as required
> +   for USB controllers in use.
> 
>  if SAMSUNG_USBPHY
> 
>  config SAMSUNG_USB2PHY
>   bool "Samsung USB 2.0 PHY controller Driver"
> - depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
> USB_OHCI_EXYNOS
> + depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
> USB_OHCI_EXYNOS || USB_DWC3
>   help
> Enable this to support Samsung USB 2.0 (High Speed) phy controller
> for Samsung SoCs.
> 
> +config SAMSUNG_USB3PHY
> + bool "Samsung USB 3.0 PHY controller Driver"
> + depends on USB_DWC3
> + help
> +   Enable this to support Samsung USB 3.0 (Super Speed) phy
> controller
> +   for samsung SoCs.
> +
>  endif

It mean, when USB_DWC3 is selected, we can select only one USB2PHY or
USB3PHY?

[...]

> +#ifdef CONFIG_OF
> +static const struct of_device_id samsung_usbphy_dt_match[] = {
> + {
> + .compatible = "samsung,exynos5250-usb3-phy",
> + .data = &usb3_phy_exynos5
> + },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
> +#endif
> +
> +static struct platform_device_id samsung_usbphy_driver_ids[] = {
> + {
> + .name   = "exynos5250-usb3-phy",

According to the name of file, exynos5250-usb3phy? Just it is imho...

> + .driver_data= (unsigned long)&usb3_phy_exynos5,
> + },
> + {},
> +};
> +
> +MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);
> +
> +static struct platform_driver samsung_usb3_phy_driver = {
> + .probe  = samsung_usb3_phy_probe,
> + .remove = samsung_usb3_phy_remove,
> + .id_table   = samsung_usbphy_driver_ids,
> + .driver = {
> + .name   = "samsung-usb3-phy",
> + .owner  = THIS_MODULE,
> + .of_match_table =
> of_match_ptr(samsung_usbphy_dt_match),
> + },
> +};
> +
> +module_platform_driver(samsung_usb3_phy_driver);
> +
> +MODULE_DESCRIPTION("Samsung USB 3.0 phy controller");
> +MODULE_AUTHOR("Vivek Gautam ");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:samsung-usb3-phy");

I want you to use same naming rule.

Thanks.

- Kukjin

___
devicetree-discuss mailing list
devicetree-discuss@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/devicetree-discuss

Re: [PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0 controller

2013-01-28 Thread Vivek Gautam 
CC: Doug Anderson


On Mon, Jan 28, 2013 at 3:56 PM, Vivek Gautam  wrote:
> Adding PHY driver support for USB 3.0 controller for Samsung's
> SoCs.
>
> Signed-off-by: Vivek Gautam 
> ---
>
> Changes from v3:
>  - Making SAMSUNG_USB3PHY dependent on SAMSUNG_USBPHY.
>  - Adding USB_DWC3 to dependencies of SAMSUNG_USB2PHY since
>dwc3 controller also looks for USB2 type PHY.
>
>  drivers/usb/phy/Kconfig  |   11 +-
>  drivers/usb/phy/Makefile |1 +
>  drivers/usb/phy/samsung-usb3.c   |  349 
> ++
>  drivers/usb/phy/samsung-usbphy.h |   81 +
>  4 files changed, 441 insertions(+), 1 deletions(-)
>  create mode 100644 drivers/usb/phy/samsung-usb3.c
>
> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> index cc0d230..9325a95 100644
> --- a/drivers/usb/phy/Kconfig
> +++ b/drivers/usb/phy/Kconfig
> @@ -52,14 +52,23 @@ config SAMSUNG_USBPHY
> help
>   Enable this to support Samsung USB phy controllers for Samsung
>   SoCs.
> + Further enable USB 2.0 type PHY or USB 3.0 type PHY as required
> + for USB controllers in use.
>
>  if SAMSUNG_USBPHY
>
>  config SAMSUNG_USB2PHY
> bool "Samsung USB 2.0 PHY controller Driver"
> -   depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS
> +   depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS || 
> USB_DWC3
> help
>   Enable this to support Samsung USB 2.0 (High Speed) phy controller
>   for Samsung SoCs.
>
> +config SAMSUNG_USB3PHY
> +   bool "Samsung USB 3.0 PHY controller Driver"
> +   depends on USB_DWC3
> +   help
> + Enable this to support Samsung USB 3.0 (Super Speed) phy controller
> + for samsung SoCs.
> +
>  endif
> diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
> index 7ba9862..b8505ac 100644
> --- a/drivers/usb/phy/Makefile
> +++ b/drivers/usb/phy/Makefile
> @@ -11,3 +11,4 @@ obj-$(CONFIG_USB_EHCI_TEGRA)  += tegra_usb_phy.o
>  obj-$(CONFIG_USB_RCAR_PHY) += rcar-phy.o
>  obj-$(CONFIG_SAMSUNG_USBPHY)   += samsung-usbphy.o
>  obj-$(CONFIG_SAMSUNG_USB2PHY)  += samsung-usb2.o
> +obj-$(CONFIG_SAMSUNG_USB3PHY)  += samsung-usb3.o
> diff --git a/drivers/usb/phy/samsung-usb3.c b/drivers/usb/phy/samsung-usb3.c
> new file mode 100644
> index 000..29e1321
> --- /dev/null
> +++ b/drivers/usb/phy/samsung-usb3.c
> @@ -0,0 +1,349 @@
> +/* linux/drivers/usb/phy/samsung-usb3.c
> + *
> + * Copyright (c) 2012 Samsung Electronics Co., Ltd.
> + *  http://www.samsung.com
> + *
> + * Author: Vivek Gautam 
> + *
> + * Samsung USB 3.0 PHY transceiver; talks to DWC3 controller.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +#include 
> +
> +#include "samsung-usbphy.h"
> +
> +/*
> + * Sets the phy clk as EXTREFCLK (XXTI) which is internal clock from clock 
> core.
> + */
> +static u32 samsung_usb3_phy_set_refclk(struct samsung_usbphy *sphy)
> +{
> +   u32 reg;
> +   u32 refclk;
> +
> +   refclk = sphy->ref_clk_freq;
> +
> +   reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK |
> +   PHYCLKRST_FSEL(refclk);
> +
> +   switch (refclk) {
> +   case FSEL_CLKSEL_50M:
> +   reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF |
> +   PHYCLKRST_SSC_REFCLKSEL(0x00));
> +   break;
> +   case FSEL_CLKSEL_20M:
> +   reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF |
> +   PHYCLKRST_SSC_REFCLKSEL(0x00));
> +   break;
> +   case FSEL_CLKSEL_19200K:
> +   reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF |
> +   PHYCLKRST_SSC_REFCLKSEL(0x88));
> +   break;
> +   case FSEL_CLKSEL_24M:
> +   default:
> +   reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
> +   PHYCLKRST_SSC_REFCLKSEL(0x88));
> +   break;
> +   }
> +
> +   return reg;
> +}
> +
> +static int samsung_exynos5_usb3_phy_enable(struct samsung_usbphy *sphy)
> +{
> +   void __iomem *regs = sphy->regs;
> +   u32 phyparam0;
> +   u32 phyparam1;
> +   u32 linksystem;
> +   u32 phybatchg;
> +   u32 phytest;
> +   u32 phyclkrst;
> +
> +   /* Reset USB 3.0 PHY */
> +   writel(0x0, regs + EXYNOS5_DRD_PHYREG0);
> +
> +   phyparam0 = readl(regs + EXYNOS5_DRD_PHYPARAM0);
> +   /* Select PHY CLK source */
> +   phyparam0 &= ~

[PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0 controller

2013-01-28 Thread Vivek Gautam 
Adding PHY driver support for USB 3.0 controller for Samsung's
SoCs.

Signed-off-by: Vivek Gautam 
---

Changes from v3:
 - Making SAMSUNG_USB3PHY dependent on SAMSUNG_USBPHY.
 - Adding USB_DWC3 to dependencies of SAMSUNG_USB2PHY since
   dwc3 controller also looks for USB2 type PHY.

 drivers/usb/phy/Kconfig  |   11 +-
 drivers/usb/phy/Makefile |1 +
 drivers/usb/phy/samsung-usb3.c   |  349 ++
 drivers/usb/phy/samsung-usbphy.h |   81 +
 4 files changed, 441 insertions(+), 1 deletions(-)
 create mode 100644 drivers/usb/phy/samsung-usb3.c

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index cc0d230..9325a95 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -52,14 +52,23 @@ config SAMSUNG_USBPHY
help
  Enable this to support Samsung USB phy controllers for Samsung
  SoCs.
+ Further enable USB 2.0 type PHY or USB 3.0 type PHY as required
+ for USB controllers in use.
 
 if SAMSUNG_USBPHY
 
 config SAMSUNG_USB2PHY
bool "Samsung USB 2.0 PHY controller Driver"
-   depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS
+   depends on USB_S3C_HSOTG || USB_EHCI_S5P || USB_OHCI_EXYNOS || USB_DWC3
help
  Enable this to support Samsung USB 2.0 (High Speed) phy controller
  for Samsung SoCs.
 
+config SAMSUNG_USB3PHY
+   bool "Samsung USB 3.0 PHY controller Driver"
+   depends on USB_DWC3
+   help
+ Enable this to support Samsung USB 3.0 (Super Speed) phy controller
+ for samsung SoCs.
+
 endif
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index 7ba9862..b8505ac 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -11,3 +11,4 @@ obj-$(CONFIG_USB_EHCI_TEGRA)  += tegra_usb_phy.o
 obj-$(CONFIG_USB_RCAR_PHY) += rcar-phy.o
 obj-$(CONFIG_SAMSUNG_USBPHY)   += samsung-usbphy.o
 obj-$(CONFIG_SAMSUNG_USB2PHY)  += samsung-usb2.o
+obj-$(CONFIG_SAMSUNG_USB3PHY)  += samsung-usb3.o
diff --git a/drivers/usb/phy/samsung-usb3.c b/drivers/usb/phy/samsung-usb3.c
new file mode 100644
index 000..29e1321
--- /dev/null
+++ b/drivers/usb/phy/samsung-usb3.c
@@ -0,0 +1,349 @@
+/* linux/drivers/usb/phy/samsung-usb3.c
+ *
+ * Copyright (c) 2012 Samsung Electronics Co., Ltd.
+ *  http://www.samsung.com
+ *
+ * Author: Vivek Gautam 
+ *
+ * Samsung USB 3.0 PHY transceiver; talks to DWC3 controller.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+#include 
+
+#include "samsung-usbphy.h"
+
+/*
+ * Sets the phy clk as EXTREFCLK (XXTI) which is internal clock from clock 
core.
+ */
+static u32 samsung_usb3_phy_set_refclk(struct samsung_usbphy *sphy)
+{
+   u32 reg;
+   u32 refclk;
+
+   refclk = sphy->ref_clk_freq;
+
+   reg = PHYCLKRST_REFCLKSEL_EXT_REFCLK |
+   PHYCLKRST_FSEL(refclk);
+
+   switch (refclk) {
+   case FSEL_CLKSEL_50M:
+   reg |= (PHYCLKRST_MPLL_MULTIPLIER_50M_REF |
+   PHYCLKRST_SSC_REFCLKSEL(0x00));
+   break;
+   case FSEL_CLKSEL_20M:
+   reg |= (PHYCLKRST_MPLL_MULTIPLIER_20MHZ_REF |
+   PHYCLKRST_SSC_REFCLKSEL(0x00));
+   break;
+   case FSEL_CLKSEL_19200K:
+   reg |= (PHYCLKRST_MPLL_MULTIPLIER_19200KHZ_REF |
+   PHYCLKRST_SSC_REFCLKSEL(0x88));
+   break;
+   case FSEL_CLKSEL_24M:
+   default:
+   reg |= (PHYCLKRST_MPLL_MULTIPLIER_24MHZ_REF |
+   PHYCLKRST_SSC_REFCLKSEL(0x88));
+   break;
+   }
+
+   return reg;
+}
+
+static int samsung_exynos5_usb3_phy_enable(struct samsung_usbphy *sphy)
+{
+   void __iomem *regs = sphy->regs;
+   u32 phyparam0;
+   u32 phyparam1;
+   u32 linksystem;
+   u32 phybatchg;
+   u32 phytest;
+   u32 phyclkrst;
+
+   /* Reset USB 3.0 PHY */
+   writel(0x0, regs + EXYNOS5_DRD_PHYREG0);
+
+   phyparam0 = readl(regs + EXYNOS5_DRD_PHYPARAM0);
+   /* Select PHY CLK source */
+   phyparam0 &= ~PHYPARAM0_REF_USE_PAD;
+   /* Set Loss-of-Signal Detector sensitivity */
+   phyparam0 &= ~PHYPARAM0_REF_LOSLEVEL_MASK;
+   phyparam0 |= PHYPARAM0_REF_LOSLEVEL;
+   writel(phyparam0, regs + EXYNOS5_DRD_PHYPARAM0);
+
+   writel(0x0, regs + EXYNOS5_DRD_PHYRESUME);
+
+   /*
+* Setting the Frame length Adj value[6:1] to default 0x20