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usbdebug: Improve receive speed

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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>
This commit is contained in:
Kyösti Mälkki
2014-01-15 22:26:03 +02:00
parent ed87ebc325
commit 0108bf5157
3 changed files with 20 additions and 6 deletions
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18
src/drivers/usb/ehci_debug.c
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@ -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)
{