Alexander Shishkin a écrit :
> This adds EHCI host support to the chipidea driver. We want it to be
> part of the hdrc driver and not a standalone (sub-)driver module, as
> the structure of ehci-hcd.c suggests, so for chipidea controller we
> hack it to not provide platform-related code, but only the ehci hcd.
>
> The ehci-platform driver won't work for us here too, because the
> controller uses the same registers for both device and host mode and
> also otg-related bits, so it's not really possible to put ehci registers
> into a separate resource.
>
> This is not a pretty solution, but the alternative is exporting symbols
> from the chipidea driver to a ehci-chipidea driver and doing all the
> module refcounting.
>
> Signed-off-by: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
> Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
> +
> +static const struct hc_driver ci_ehci_hc_driver = {
> + .description = "ehci_hcd",
> + .product_desc = "ChipIdea HDRC EHCI",
> + .hcd_priv_size = sizeof(struct ehci_hcd),
> +
> + /*
> + * generic hardware linkage
> + */
> + .irq = ehci_irq,
> + .flags = HCD_MEMORY | HCD_USB2,
> +
> + /*
> + * basic lifecycle operations
> + */
> + .reset = ci_ehci_setup,
> + .start = ehci_run,
> + .stop = ehci_stop,
> + .shutdown = ehci_shutdown,
> +
> + /*
> + * managing i/o requests and associated device resources
> + */
> + .urb_enqueue = ehci_urb_enqueue,
> + .urb_dequeue = ehci_urb_dequeue,
> + .endpoint_disable = ehci_endpoint_disable,
> + .endpoint_reset = ehci_endpoint_reset,
> +
> + /*
> + * scheduling support
> + */
> + .get_frame_number = ehci_get_frame,
> +
> + /*
> + * root hub support
> + */
> + .hub_status_data = ehci_hub_status_data,
> + .hub_control = ehci_hub_control,
> + .bus_suspend = ehci_bus_suspend,
> + .bus_resume = ehci_bus_resume,
> + .relinquish_port = ehci_relinquish_port,
> + .port_handed_over = ehci_port_handed_over,
> +
> + .clear_tt_buffer_complete = ehci_clear_tt_buffer_complete,
> +};
> +
Note that some chipidea version need special callback for phy init or errata
workaround.
In the current version, this is done in platform driver (ehci-fsl.c,
ehci-tegra.c, ...).
I don't know you do you plan to manage them ?
Matthieu
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