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| author | Randall Spangler <rspangler@chromium.org> | 2017-08-31 15:56:01 -0700 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-09-01 16:41:54 -0700 |
| commit | 69e10e84aa1554c37c03a97a58058c4ea38de21d (patch) | |
| tree | 29b31d9a403a8620178b1b0af4293a7c7216a4b7 /chip | |
| parent | 9663bdca5cae0d2d67d6e9cf422a6b6119a24926 (diff) | |
| download | chrome-ec-69e10e84aa1554c37c03a97a58058c4ea38de21d.tar.gz | |
chip/g: Fix usb_console read-only
Currently, the console inhibited output when is_readonly=1, and only
inhibited input when is_enabled=0. That's harmless in the current
implementation, because common/case_closed_debug() only ever calls it
with enabled=0/readonly=1 or enabled=1/readonly=0. But if we ever do
decide to use enabled=1/readonly=1, that would have acted like
write-only, not read-only.
Fix that.
BUG=none
BRANCH=cr50
TEST=Attach to cr50 USB console, console is read/write.
Hack USB console to set is_readonly=1, console is read-only.
Change-Id: I04258fe2b040a00f98067d8be48a0632eb16e9c1
Signed-off-by: Randall Spangler <rspangler@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/647336
Reviewed-by: Mary Ruthven <mruthven@chromium.org>
Diffstat (limited to 'chip')
| -rw-r--r-- | chip/g/usb_console.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/chip/g/usb_console.c b/chip/g/usb_console.c index c3e1e09c01..f77c34a638 100644 --- a/chip/g/usb_console.c +++ b/chip/g/usb_console.c @@ -23,8 +23,18 @@ static int last_tx_ok = 1; static int is_reset; + +/* + * Start enabled, so we can queue early debug output before the board gets + * around to calling usb_console_enable(). + */ static int is_enabled = 1; -static int is_readonly; + +/* + * But start read-only, so we don't accept console input until we explicitly + * decide that we're ready for it. + */ +static int is_readonly = 1; /* USB-Serial descriptors */ const struct usb_interface_descriptor USB_IFACE_DESC(USB_IFACE_CONSOLE) = @@ -287,7 +297,7 @@ int usb_getc(void) { int c; - if (!is_enabled) + if (is_readonly || !is_enabled) return -1; if (QUEUE_REMOVE_UNITS(&rx_q, &c, 1)) @@ -300,7 +310,7 @@ int usb_puts(const char *outstr) int ret; struct queue state; - if (is_readonly) + if (!is_enabled) return EC_SUCCESS; ret = usb_wait_console(); @@ -332,7 +342,7 @@ int usb_vprintf(const char *format, va_list args) int ret; struct queue state; - if (is_readonly) + if (!is_enabled) return EC_SUCCESS; ret = usb_wait_console(); |