diff options
| author | Peter Chen <peter.chen@freescale.com> | 2013-08-14 13:44:12 +0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-08-14 23:37:20 +0400 |
| commit | 22fa84455a2a80566ead8efe4b5e629f2375da60 (patch) | |
| tree | c77615fc9011a7ab64dbe17082f85f0ae1b36c3d /drivers/usb/chipidea/ci.h | |
| parent | a107f8c505cd8606ae192d24c70b380e980fbe67 (diff) | |
| download | linux-22fa84455a2a80566ead8efe4b5e629f2375da60.tar.xz | |
usb: chipidea: add wait vbus lower than OTGSC_BSV before role starts
When the gadget role starts, we need to make sure the vbus is lower
than OTGSC_BSV, or there will be an vbus interrupt since we use
B_SESSION_VALID as vbus interrupt to indicate connect and disconnect.
When the host role starts, it may not be useful to wait vbus to lower
than OTGSC_BSV, but it can indicate some hardware problems like the
vbus is still higher than OTGSC_BSV after we disconnect to host some
time later (5000 milliseconds currently), which is obvious not correct.
Tested-by: Marek Vasut <marex@denx.de>
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>
Diffstat (limited to 'drivers/usb/chipidea/ci.h')
| -rw-r--r-- | drivers/usb/chipidea/ci.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/usb/chipidea/ci.h b/drivers/usb/chipidea/ci.h index 316036392e11..1c94fc5257f4 100644 --- a/drivers/usb/chipidea/ci.h +++ b/drivers/usb/chipidea/ci.h @@ -308,4 +308,7 @@ int hw_port_test_set(struct ci_hdrc *ci, u8 mode); u8 hw_port_test_get(struct ci_hdrc *ci); +int hw_wait_reg(struct ci_hdrc *ci, enum ci_hw_regs reg, u32 mask, + u32 value, unsigned int timeout_ms); + #endif /* __DRIVERS_USB_CHIPIDEA_CI_H */ |