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| author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-01-15 22:26:03 +0200 |
|---|---|---|
| committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-02-10 19:33:04 +0100 |
| commit | 0108bf5157de24619f644721a82775d578087573 (patch) | |
| tree | e72f7af6290f77496a2da71e3a5f23be98222f0c /src/drivers | |
| parent | ed87ebc3259abea8f952a7ffd785f670a779bde2 (diff) | |
| download | coreboot-0108bf5157de24619f644721a82775d578087573.tar.xz | |
usbdebug: Improve receive speed
Read from USB endpoint_in 8 bytes at a time, the maximum what
EHCI debug port capability has to offer.
Change-Id: I3d012d758a24b24f894e587b301f620933331407
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/4700
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>
Diffstat (limited to 'src/drivers')
| -rw-r--r-- | src/drivers/usb/ehci_debug.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/drivers/usb/ehci_debug.c b/src/drivers/usb/ehci_debug.c index 94625c0e1a..b28208df28 100644 --- a/src/drivers/usb/ehci_debug.c +++ b/src/drivers/usb/ehci_debug.c @@ -48,6 +48,7 @@ struct dbgp_pipe int timeout; u8 bufidx; + u8 buflen; char buf[8]; }; @@ -912,6 +913,23 @@ void usbdebug_tx_flush(struct dbgp_pipe *pipe) dbgp_put(pipe); } +unsigned char usbdebug_rx_byte(struct dbgp_pipe *pipe) +{ + unsigned char data = 0xff; + if (!dbgp_try_get(pipe)) + return 0xff; + while (pipe->bufidx >= pipe->buflen) { + pipe->buflen = 0; + pipe->bufidx = 0; + int count = dbgp_bulk_read_x(pipe, pipe->buf, 8); + if (count>0) + pipe->buflen = count; + } + data = pipe->buf[pipe->bufidx++]; + dbgp_put(pipe); + return data; +} + #if !defined(__PRE_RAM__) && !defined(__SMM__) static void usbdebug_re_enable(unsigned ehci_base) { |