[U-Boot] [PATCH v2 07/10] usb: mxs: Disable USB Port 1 for i.MX23

[Otavio Salvador]

On Wed, Feb 13, 2013 at 7:36 PM, Marek Vasut <marex at denx.de> wrote:
> Dear Otavio Salvador,
>
>> On Wed, Feb 13, 2013 at 7:15 PM, Marek Vasut <marex at denx.de> wrote:
>> > Dear Otavio Salvador,
>> >
>> >> The i.MX23 just one USB port so disable the second controller probe
>> >> when building for i.MX23.
>> >>
>> >> Signed-off-by: Otavio Salvador <otavio at ossystems.com.br>
>> >> ---
>> >> Changes in v2:
>> >> - Avoid wrong clock setting in MX23
>> >>
>> >>  drivers/usb/host/ehci-mxs.c | 12 ++++++++++++
>> >>  1 file changed, 12 insertions(+)
>> >>
>> >> diff --git a/drivers/usb/host/ehci-mxs.c b/drivers/usb/host/ehci-mxs.c
>> >> index 5062af5..b7bf856 100644
>> >> --- a/drivers/usb/host/ehci-mxs.c
>> >> +++ b/drivers/usb/host/ehci-mxs.c
>> >> @@ -50,10 +50,12 @@ int mxs_ehci_get_port(struct ehci_mxs *mxs_usb, int
>> >> port) usb_base = MXS_USBCTRL0_BASE;
>> >>
>> >>               phy_base = MXS_USBPHY0_BASE;
>> >>               break;
>> >>
>> >> +#ifdef CONFIG_MX28
>> >>
>> >>       case 1:
>> >>               usb_base = MXS_USBCTRL1_BASE;
>> >>               phy_base = MXS_USBPHY1_BASE;
>> >>               break;
>> >>
>> >> +#endif
>> >>
>> >>       default:
>> >>               printf("CONFIG_EHCI_MXS_PORT (port = %d)\n", port);
>> >>               return -1;
>> >>
>> >> @@ -67,7 +69,9 @@ int mxs_ehci_get_port(struct ehci_mxs *mxs_usb, int
>> >> port)
>> >>
>> >>  /* This DIGCTL register ungates clock to USB */
>> >>  #define      HW_DIGCTL_CTRL                  0x8001c000
>> >>  #define      HW_DIGCTL_CTRL_USB0_CLKGATE     (1 << 2)
>> >>
>> >> +#ifdef CONFIG_MX28
>> >>
>> >>  #define      HW_DIGCTL_CTRL_USB1_CLKGATE     (1 << 16)
>> >>
>> >> +#endif
>> >>
>> >>  int ehci_hcd_init(int index, struct ehci_hccr **hccr, struct ehci_hcor
>> >>
>> >> **hcor) {
>> >> @@ -95,8 +99,12 @@ int ehci_hcd_init(int index, struct ehci_hccr **hccr,
>> >> struct ehci_hcor **hcor) writel(CLKCTRL_PLL1CTRL0_EN_USB_CLKS |
>> >> CLKCTRL_PLL1CTRL0_POWER,
>> >>
>> >>                       &clkctrl_regs->hw_clkctrl_pll1ctrl0_set);
>> >>
>> >> +#if defined(CONFIG_MX23)
>> >> +     writel(HW_DIGCTL_CTRL_USB0_CLKGATE,     &digctl_ctrl->reg_clr);
>> >
>> > What is that large space before '&digctl_regs->...' ?
>>
>> My fault. I can fix it.
>>
>> >> +#elif defined(CONFIG_MX28)
>> >>
>> >>       writel(HW_DIGCTL_CTRL_USB0_CLKGATE | HW_DIGCTL_CTRL_USB1_CLKGATE,
>> >>
>> >>               &digctl_ctrl->reg_clr);
>> >>
>> >> +#endif
>> >
>> > I'm sure these can be wrapped in much more elegant way, yes?
>>
>> I wanted to keep the changes at minimum; so seems the right route.
>> What you'd like me to do? Use a temporary variable?
>
> Either that or wrap it all in struct ehci_mxs and do these ungatings etc on a
> per-port basis.

I've prepared the v3 of the patch; I will give it a runtime test
tomorrow and send.

-- 
Otavio Salvador                             O.S. Systems
E-mail: otavio at ossystems.com.br  http://www.ossystems.com.br
Mobile: +55 53 9981-7854              http://projetos.ossystems.com.br