On Wed, 18 Apr 2012, Marek Vasut wrote:
> This driver will handle i.MX233/i.MX28 and I hope soon i.MX6Q. I tried to keep
> this separate from the MXC EHCI to avoid further polution of the MXC EHCI,
> though eventually these two might be merged.
> +/* Called during probe() after chip reset completes */
> +static int ehci_mxs_setup(struct usb_hcd *hcd)
> +{
> + struct ehci_hcd *ehci = hcd_to_ehci(hcd);
> + int retval;
> +
> + dbg_hcs_params(ehci, "reset");
> + dbg_hcc_params(ehci, "reset");
> +
> + /* Cache this readonly data; minimize chip reads. */
> + ehci->hcs_params = ehci_readl(ehci, &ehci->caps->hcs_params);
> +
> + hcd->has_tt = 1;
> +
> + retval = ehci_halt(ehci);
> + if (retval)
> + return retval;
> +
> + /* Data structure init. */
> + retval = ehci_init(hcd);
> + if (retval)
> + return retval;
> +
> + ehci->sbrn = 0x20;
> +
> + ehci_reset(ehci);
> +
> + ehci_port_power(ehci, 0);
> +
> + return 0;
> +}
The current recommendation is that people use the existing ehci_setup()
routine in ehci-hcd.c as much as possible instead of duplicating the
code.
Alan Stern
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