mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-23 15:32:33 +00:00
83 lines
2.9 KiB
Diff
83 lines
2.9 KiB
Diff
|
From 20a677fd63c57edd5b0c463baa44f133b2f2d4a0 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Peter Chen <peter.chen@freescale.com>
|
||
|
|
Date: Thu, 13 Jun 2013 17:59:52 +0300
|
||
|
|
Subject: [PATCH] usb: chipidea: improve kconfig
|
||
|
|
|
||
|
|
Randy Dunlap <rdunlap@infradead.org> reported this problem
|
||
|
|
on i386:
|
||
|
|
|
||
|
|
> drivers/built-in.o: In function `ci_hdrc_host_init':
|
||
|
|
> (.text+0x2ce75c): undefined reference to `ehci_init_driver'
|
||
|
|
>
|
||
|
|
> When USB_EHCI_HCD=m and USB_CHIPIDEA=y.
|
||
|
|
|
||
|
|
In fact, this problem is existed on all platforms which are using
|
||
|
|
chipidea driver. The root cause of this problem is the chipidea host
|
||
|
|
uses symbol exported from ehci-hcd, but chipidea core
|
||
|
|
does not depends on USB_EHCI_HCD. So, chipidea driver
|
||
|
|
will not be compiled as module if USB_EHCI_HCD=m.
|
||
|
|
|
||
|
|
It is very hard to give a perfect solution since chipidea core
|
||
|
|
depends on USB || USB_GADGET, and chipdiea host depends on
|
||
|
|
both USB_EHCI_HCD and USB_CHIPIDEA, the same problem exists for
|
||
|
|
gadget.
|
||
|
|
|
||
|
|
To fix this problem, we had to have below assumptions:
|
||
|
|
|
||
|
|
- If USB_EHCI_HCD=y && USB_GADGET=y, USB_CHIPIDEA can be 'y'.
|
||
|
|
|
||
|
|
- If USB_EHCI_HCD=m && USB_GADGET=y, USB_CHIPIDEA=m
|
||
|
|
or USB_CHIPIDEA_HOST can't be seen if USB_CHIPIDEA=y.
|
||
|
|
It will cause compile error due to no glue layer for ehci:
|
||
|
|
|
||
|
|
> error: #error "missing bus glue for ehci-hcd"
|
||
|
|
|
||
|
|
So, we had to compile USB_CHIPIDEA=m if USB_EHCI_HCD=m,
|
||
|
|
current ehci hcd core guarantee it.
|
||
|
|
|
||
|
|
- If USB_EHCI_HCD=y && USB_GADGET=m, USB_CHIPIDEA=m
|
||
|
|
or USB_CHIPIDEA_UDC can't be seen if USB_CHIPIDEA=y.
|
||
|
|
Of cos, the gadget will out of working at this situation,
|
||
|
|
so the user had to compile USB_CHIPIDEA=m.
|
||
|
|
|
||
|
|
- USB_EHCI_HCD=m && USB_GADGET=m, we can't see
|
||
|
|
USB_CHIPIDEA_HOST and USB_CHIPIDEA_UDC unless
|
||
|
|
USB_CHIPIDEA=m.
|
||
|
|
|
||
|
|
The reason why it has above assumptions:
|
||
|
|
- If both ehci core and gadget core build as module,
|
||
|
|
the chipidea has to build as module.
|
||
|
|
- If one of ehci core or gadget core is built in, another
|
||
|
|
is built as module, we can only enable the function which
|
||
|
|
is built in, or enable both roles as modules (USB_CHIPIDEA=m),
|
||
|
|
since chipidea core driver takes care of both host and device roles.
|
||
|
|
|
||
|
|
Signed-off-by: Peter Chen <peter.chen@freescale.com>
|
||
|
|
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
|
||
|
|
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
||
|
|
---
|
||
|
|
drivers/usb/chipidea/Kconfig | 6 +++---
|
||
|
|
1 file changed, 3 insertions(+), 3 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/usb/chipidea/Kconfig
|
||
|
|
+++ b/drivers/usb/chipidea/Kconfig
|
||
|
|
@@ -12,15 +12,15 @@ if USB_CHIPIDEA
|
||
|
|
|
||
|
|
config USB_CHIPIDEA_UDC
|
||
|
|
bool "ChipIdea device controller"
|
||
|
|
- depends on USB_GADGET=y || USB_GADGET=USB_CHIPIDEA
|
||
|
|
+ depends on USB_GADGET=y || USB_CHIPIDEA=m
|
||
|
|
help
|
||
|
|
Say Y here to enable device controller functionality of the
|
||
|
|
ChipIdea driver.
|
||
|
|
|
||
|
|
config USB_CHIPIDEA_HOST
|
||
|
|
bool "ChipIdea host controller"
|
||
|
|
- depends on USB=y || USB=USB_CHIPIDEA
|
||
|
|
- depends on USB_EHCI_HCD=y
|
||
|
|
+ depends on USB=y
|
||
|
|
+ depends on USB_EHCI_HCD=y || USB_CHIPIDEA=m
|
||
|
|
select USB_EHCI_ROOT_HUB_TT
|
||
|
|
help
|
||
|
|
Say Y here to enable host controller functionality of the
|