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Date: Thu, 26 Dec 2013 16:02:09 +0530
From: Vivek Gautam <gautamvivek1987@...il.com>
To: Kamil Debski <k.debski@...sung.com>
Cc: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-samsung-soc@...r.kernel.org"
<linux-samsung-soc@...r.kernel.org>,
Linux USB Mailing List <linux-usb@...r.kernel.org>,
"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
Kyungmin Park <kyungmin.park@...sung.com>,
kishon <kishon@...com>, Tomasz Figa <t.figa@...sung.com>,
Sylwester Nawrocki <s.nawrocki@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
Vivek Gautam <gautam.vivek@...sung.com>,
Mateusz Krawczuk <mat.krawczuk@...il.com>,
yulgon.kim@...sung.com, Praveen Paneri <p.paneri@...sung.com>,
av.tikhomirov@...sung.com, Jingoo Han <jg1.han@...sung.com>,
Kumar Gala <galak@...eaurora.org>, matt.porter@...aro.org,
tjakobi@...h.uni-bielefeld.de,
Alan Stern <stern@...land.harvard.edu>
Subject: Re: [PATCH v2 9/9] dts: Add usb2phy to Exynos 5250
Hi Kamil,
On Fri, Dec 20, 2013 at 6:54 PM, Kamil Debski <k.debski@...sung.com> wrote:
> Add support to PHY of USB2 of the Exynos 5250 SoC.
>
> Signed-off-by: Kamil Debski <k.debski@...sung.com>
> ---
> arch/arm/boot/dts/exynos5250.dtsi | 33 ++++++++++++-------
> drivers/phy/phy-exynos5250-usb2.c | 64 +++++++++++++++++++++++++++++++++----
> 2 files changed, 78 insertions(+), 19 deletions(-)
>
> diff --git a/arch/arm/boot/dts/exynos5250.dtsi b/arch/arm/boot/dts/exynos5250.dtsi
> index 2f264ad..922e0ed 100644
> --- a/arch/arm/boot/dts/exynos5250.dtsi
> +++ b/arch/arm/boot/dts/exynos5250.dtsi
> @@ -163,6 +163,11 @@
> interrupts = <0 47 0>;
> };
>
> + sys_syscon: syscon@...40000 {
> + compatible = "samsung,exynos5250-sys", "syscon";
> + reg = <0x10050000 0x5000>;
> + };
> +
> pmu_syscon: syscon@...40000 {
> compatible = "samsung,exynos5250-pmu", "syscon";
> reg = <0x10040000 0x5000>;
> @@ -505,6 +510,14 @@
>
> clocks = <&clock 285>;
> clock-names = "usbhost";
> + #address-cells = <1>;
> + #size-cells = <0>;
> + port@0 {
> + reg = <0>;
> + phys = <&usb2_phy 1>;
> + phy-names = "host";
> + status = "ok";
> + };
> };
>
> usb@...20000 {
> @@ -516,19 +529,15 @@
> clock-names = "usbhost";
> };
>
> - usb2_phy: usbphy@...30000 {
> - compatible = "samsung,exynos5250-usb2phy";
> + usb2_phy: phy@...30000 {
> + compatible = "samsung,exynos5250-usb2-phy";
> reg = <0x12130000 0x100>;
> - clocks = <&clock 1>, <&clock 285>;
> - clock-names = "ext_xtal", "usbhost";
> - #address-cells = <1>;
> - #size-cells = <1>;
> - ranges;
> -
> - usbphy-sys {
> - reg = <0x10040704 0x8>,
> - <0x10050230 0x4>;
> - };
> + clocks = <&clock 285>, <&clock 1>, <&clock 1>, <&clock 1>,
> + <&clock 1>;
> + clock-names = "phy", "device", "host", "hsic0", "hsic1";
> + #phy-cells = <1>;
> + samsung,sysreg-phandle = <&sys_syscon>;
> + samsung,pmureg-phandle = <&pmu_syscon>;
> };
>
> amba {
> diff --git a/drivers/phy/phy-exynos5250-usb2.c b/drivers/phy/phy-exynos5250-usb2.c
> index b9b3b98..337bf82 100644
> --- a/drivers/phy/phy-exynos5250-usb2.c
> +++ b/drivers/phy/phy-exynos5250-usb2.c
Separate patches for dt and driver ?
I think you wanted to move these changes to :
[PATCH v5 7/9] phy: Add Exynos 5250 support to the Exynos USB 2.0 PHY driver
> @@ -58,7 +58,13 @@
> #define EXYNOS_5250_HOSTPHYCTRL2 0x20
Shouldn't we leave the naming as EXYNOS_5250_HSICPHYCTRL2 instead of
EXYNOS_5250_HOSTPHYCTRL2 ? That will go in sync with the user-manual too.
and similar for EXYNOS_5250_HOSTPHYCTRL1 and below bit definitions too ?
>
> #define EXYNOS_5250_HOSTPHYCTRLX_REFCLKSEL_MASK (0x3 << 23)
> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKSEL_DEFAULT (0x2 << 23)
> #define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_MASK (0x7f << 16)
> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_12 (0x24 << 16)
> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_15 (0x1c << 16)
> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_16 (0x1a << 16)
> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_19_2 (0x15 << 16)
> +#define EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_20 (0x14 << 16)
> #define EXYNOS_5250_HOSTPHYCTRLX_SIDDQ BIT(6)
> #define EXYNOS_5250_HOSTPHYCTRLX_FORCESLEEP BIT(5)
> #define EXYNOS_5250_HOSTPHYCTRLX_FORCESUSPEND BIT(4)
> @@ -191,13 +197,14 @@ static void exynos5250_isol(struct samsung_usb2_phy_instance *inst, bool on)
> regmap_update_bits(drv->reg_pmu, offset, mask, on ? 0 : mask);
> }
>
> -static void exynos5250_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
> +static int exynos5250_power_on(struct samsung_usb2_phy_instance *inst)
void ? we really don't have much to return in this function.
> {
> struct samsung_usb2_phy_driver *drv = inst->drv;
> u32 ctrl0;
> u32 otg;
> u32 ehci;
> u32 ohci;
> + u32 hsic;
>
> switch (inst->cfg->id) {
> case EXYNOS5250_DEVICE:
> @@ -234,6 +241,8 @@ static void exynos5250_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
>
> break;
> case EXYNOS5250_HOST:
> + case EXYNOS5250_HSIC0:
> + case EXYNOS5250_HSIC1:
> /* Host registers configuration */
> ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
> /* The clock */
> @@ -279,6 +288,18 @@ static void exynos5250_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
> EXYNOS_5250_USBOTGSYS_LINK_SW_RST_UOTG |
> EXYNOS_5250_USBOTGSYS_PHYLINK_SW_RESET);
>
> + /* HSIC phy configuration */
> + hsic = (EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_12 |
> + EXYNOS_5250_HOSTPHYCTRLX_REFCLKSEL_DEFAULT |
> + EXYNOS_5250_HOSTPHYCTRLX_PHYSWRST);
> + writel(hsic, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL1);
> + writel(hsic, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL2);
> + udelay(10);
> + hsic &= ~EXYNOS_5250_HOSTPHYCTRLX_PHYSWRST;
> + writel(hsic, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL1);
> + writel(hsic, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL2);
> + udelay(80);
> +
> /* Enable EHCI DMA burst */
> ehci = readl(drv->reg_phy + EXYNOS_5250_HOSTEHCICTRL);
> ehci |= EXYNOS_5250_HOSTEHCICTRL_ENAINCRXALIGN |
> @@ -295,12 +316,7 @@ static void exynos5250_phy_pwr(struct samsung_usb2_phy_instance *inst, bool on)
>
> break;
> }
> -}
> -
> -static int exynos5250_power_on(struct samsung_usb2_phy_instance *inst)
> -{
> inst->enabled = 1;
> - exynos5250_phy_pwr(inst, 1);
> exynos5250_isol(inst, 0);
>
> return 0;
> @@ -308,9 +324,43 @@ static int exynos5250_power_on(struct samsung_usb2_phy_instance *inst)
>
> static int exynos5250_power_off(struct samsung_usb2_phy_instance *inst)
ditto
> {
> + struct samsung_usb2_phy_driver *drv = inst->drv;
> + u32 ctrl0;
> + u32 otg;
> + u32 hsic;
> +
> inst->enabled = 0;
> exynos5250_isol(inst, 1);
> - exynos5250_phy_pwr(inst, 0);
> +
> + switch (inst->cfg->id) {
> + case EXYNOS5250_DEVICE:
> + otg = readl(drv->reg_phy + EXYNOS_5250_USBOTGSYS);
> + otg |= (EXYNOS_5250_USBOTGSYS_FORCE_SUSPEND |
> + EXYNOS_5250_USBOTGSYS_SIDDQ_UOTG |
> + EXYNOS_5250_USBOTGSYS_FORCE_SLEEP);
> + writel(otg, drv->reg_phy + EXYNOS_5250_USBOTGSYS);
> + break;
> + case EXYNOS5250_HOST:
> + ctrl0 = readl(drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
> + ctrl0 |= (EXYNOS_5250_HOSTPHYCTRL0_SIDDQ |
> + EXYNOS_5250_HOSTPHYCTRL0_FORCESUSPEND |
> + EXYNOS_5250_HOSTPHYCTRL0_FORCESLEEP |
> + EXYNOS_5250_HOSTPHYCTRL0_PHYSWRST |
> + EXYNOS_5250_HOSTPHYCTRL0_PHYSWRSTALL);
> + writel(ctrl0, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL0);
> + break;
> + case EXYNOS5250_HSIC0:
> + case EXYNOS5250_HSIC1:
> + hsic = (EXYNOS_5250_HOSTPHYCTRLX_REFCLKDIV_12 |
> + EXYNOS_5250_HOSTPHYCTRLX_REFCLKSEL_DEFAULT |
> + EXYNOS_5250_HOSTPHYCTRLX_SIDDQ |
> + EXYNOS_5250_HOSTPHYCTRLX_FORCESLEEP |
> + EXYNOS_5250_HOSTPHYCTRLX_FORCESUSPEND
> + );
> + writel(hsic, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL1);
> + writel(hsic, drv->reg_phy + EXYNOS_5250_HOSTPHYCTRL2);
> + break;
> + }
>
> return 0;
> }
> --
> 1.7.9.5
>
> --
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--
Best Regards
Vivek Gautam
Samsung R&D Institute, Bangalore
India
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