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author | Alexander Shishkin <alexander.shishkin@linux.intel.com> | 2012-05-11 17:25:54 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2012-05-11 16:56:15 -0700 |
commit | eb70e5ab8f95a81283623c03d2c99dfc59fcb319 (patch) | |
tree | fc20c9d10484171490cf6b69f7f5b6f934803366 /drivers/usb/chipidea/host.h | |
parent | 758fc9860c19eceb56e5886a5225db623c521971 (diff) | |
download | linux-eb70e5ab8f95a81283623c03d2c99dfc59fcb319.tar.gz linux-eb70e5ab8f95a81283623c03d2c99dfc59fcb319.tar.bz2 linux-eb70e5ab8f95a81283623c03d2c99dfc59fcb319.zip |
usb: chipidea: add host role
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@linux.intel.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/chipidea/host.h')
-rw-r--r-- | drivers/usb/chipidea/host.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/host.h b/drivers/usb/chipidea/host.h new file mode 100644 index 000000000000..761fb1fd6d99 --- /dev/null +++ b/drivers/usb/chipidea/host.h @@ -0,0 +1,17 @@ +#ifndef __DRIVERS_USB_CHIPIDEA_HOST_H +#define __DRIVERS_USB_CHIPIDEA_HOST_H + +#ifdef CONFIG_USB_CHIPIDEA_HOST + +int ci_hdrc_host_init(struct ci13xxx *ci); + +#else + +static inline int ci_hdrc_host_init(struct ci13xxx *ci) +{ + return -ENXIO; +} + +#endif + +#endif /* __DRIVERS_USB_CHIPIDEA_HOST_H */ |