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pxa2xx: fix SSSR TFN logic 

Fix SSSR TFN logic: TX FIFO is never filled, so it is always in
underrun condition if SSP is enabled.

This also avoids a gcc warning with -Wtype-limits.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Blue Swirl 2010-09-18 05:53:15 +00:00
parent 1c7242da85
commit 7d1476898f
1 changed files with 4 additions and 4 deletions
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8
hw/pxa2xx.c
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@ -636,6 +636,7 @@ static void pxa2xx_ssp_fifo_update(PXA2xxSSPState *s)
{
s->sssr &= ~(0xf << 12); /* Clear RFL */
s->sssr &= ~(0xf << 8); /* Clear TFL */
s->sssr &= ~SSSR_TFS;
s->sssr &= ~SSSR_TNF;
if (s->enable) {
s->sssr |= ((s->rx_level - 1) & 0xf) << 12;
@ -643,14 +644,13 @@ static void pxa2xx_ssp_fifo_update(PXA2xxSSPState *s)
s->sssr |= SSSR_RFS;
else
s->sssr &= ~SSSR_RFS;
if (0 <= SSCR1_TFT(s->sscr[1]))
s->sssr |= SSSR_TFS;
else
s->sssr &= ~SSSR_TFS;
if (s->rx_level)
s->sssr |= SSSR_RNE;
else
s->sssr &= ~SSSR_RNE;
/* TX FIFO is never filled, so it is always in underrun
condition if SSP is enabled */
s->sssr |= SSSR_TFS;
s->sssr |= SSSR_TNF;
}