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DMAENGINE: ste_dma40: Fix failed to restart logical channel bug

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A transfer that runs in the different direction on the same
channel will now be resumed when the other is suspend/stopped.

Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Jonas Aaberg 2010-08-09 12:07:44 +00:00 committed by Dan Williams
parent 0747c7bae5
commit be8cb7dfd9
1 changed files with 7 additions and 11 deletions
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18
drivers/dma/ste_dma40.c
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@ -640,19 +640,15 @@ static void d40_config_set_event(struct d40_chan *d40c, bool do_enable)
static u32 d40_chan_has_events(struct d40_chan *d40c)
{
u32 val = 0;
u32 val;
/* If SSLNK or SDLNK is zero all events are disabled */
if ((d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_MEM) ||
(d40c->dma_cfg.dir == STEDMA40_PERIPH_TO_PERIPH))
val = readl(d40c->base->virtbase + D40_DREG_PCBASE +
d40c->phy_chan->num * D40_DREG_PCDELTA +
D40_CHAN_REG_SSLNK);
val = readl(d40c->base->virtbase + D40_DREG_PCBASE +
d40c->phy_chan->num * D40_DREG_PCDELTA +
D40_CHAN_REG_SSLNK);
if (d40c->dma_cfg.dir != STEDMA40_PERIPH_TO_MEM)
val = readl(d40c->base->virtbase + D40_DREG_PCBASE +
d40c->phy_chan->num * D40_DREG_PCDELTA +
D40_CHAN_REG_SDLNK);
val |= readl(d40c->base->virtbase + D40_DREG_PCBASE +
d40c->phy_chan->num * D40_DREG_PCDELTA +
D40_CHAN_REG_SDLNK);
return val;
}