[U-Boot] [PATCH v3 3/3] imx:mx6slevk add board level support for usb

[Marek Vasut]

On Friday, November 07, 2014 at 12:08:03 PM, Peng Fan wrote:
> 在 11/7/2014 4:26 PM, Marek Vasut 写道:
> > On Friday, November 07, 2014 at 02:08:14 AM, Peng Fan wrote:
> >> Add pinmux settings, implement board_ehci_hcd_init, board_usb_phy_mode
> >> 
> >> There are two usb port on mx6slevk board:
> >> 1. otg port
> >> 2. host port
> >> The following are the connection between usb controller and board usb
> >> interface, host port has not ID pin set:
> >> otg1 core <---> board otg port
> >> otg2 core <---> board host port
> >> In order to make host port work, board_usb_phy_mode return 0 to let
> >> ehci-mx6.c driver decide otg2 core to works in host mode.
> >> 
> >> Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
> >> Signed-off-by: Ye Li <B37916 at freescale.com>
> >> ---
> > 
> > [...]
> > 
> >> @@ -150,6 +151,63 @@ static int setup_fec(void)
> >> 
> >>   }
> >>   #endif
> >> 
> >> +#ifdef CONFIG_USB_EHCI_MX6
> >> +#define USB_OTHERREGS_OFFSET	0x800
> >> +#define USBPHY_CTRL		0x30
> >> +#define UCTRL_PWR_POL		(1 << 9)
> >> +#define USBPHY_CTRL_OTG_ID	0x08000000
> > 
> > This looks like an duplication. Aren't those bits defined somewhere in
> > generic code already ?
> 
> If this way 'int board_usb_phy_mode(int port, enum usb_init_type *type)'
> can be accpeted, these bits are not needed and I'll move these bits in
> the seperate PHY register struct access patch. Anyway, after the board
> level usb support patch.

What about abstracting that stuff into a function which returns the PHY's
idea of the current mode instead. That way, you can determine the PHY's
idea of the mode from both board code and the driver code.

Best regards,
Marek Vasut