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Date: Mon, 30 Dec 2013 16:18:39 +0100
From: Kamil Debski <k.debski@...sung.com>
To: 'Vivek Gautam' <gautamvivek1987@...il.com>
Cc: linux-kernel@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
'Linux USB Mailing List' <linux-usb@...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,
> From: Vivek Gautam [mailto:gautamvivek1987@...il.com]
> Sent: Thursday, December 26, 2013 11:32 AM
>
> 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
Good point. I am planning to reorganise this patchset to prevent breaking
git bisect. I wanted to wait for more comments to this version, so I could
address any issues that may be reported.
>
> > @@ -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
> ?
Thank you for pointing this out.
> >
> > #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.
Initially the idea was to enable the return of an error code. However,
I see that for all currently supported SoCs the ops always returns 0.
So I will consider switching to void.
>
> > {
> > 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
> >
> > --
> > To unsubscribe from this list: send the line "unsubscribe
> > linux-samsung-soc" in the body of a message to
> > majordomo@...r.kernel.org More majordomo info at
> > http://vger.kernel.org/majordomo-info.html
>
>
>
> --
> Best Regards
> Vivek Gautam
> Samsung R&D Institute, Bangalore
> India
Best wishes,
--
Kamil Debski
Samsung R&D Institute Poland
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