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gianfar: Replace spin_event_timeout() with arch independent 

Use arch independent code to replace the powerpc dependent
spin_event_timeout() from gfar_halt_nodisable().
Added GRS/GTS read accessors to clean-up the implementation
of gfar_halt_nodisable().

Signed-off-by: Claudiu Manoil <claudiu.manoil@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Claudiu Manoil 2014-10-07 10:44:34 +03:00 committed by David S. Miller
parent 83bfc3c476
commit a4feee89ce
2 changed files with 34 additions and 13 deletions
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32
drivers/net/ethernet/freescale/gianfar.c
View File

@ -1762,26 +1762,32 @@ static void gfar_halt_nodisable(struct gfar_private *priv)
{
struct gfar __iomem *regs = priv->gfargrp[0].regs;
u32 tempval;
unsigned int timeout;
int stopped;
gfar_ints_disable(priv);
if (gfar_is_dma_stopped(priv))
return;
/* Stop the DMA, and wait for it to stop */
tempval = gfar_read(&regs->dmactrl);
if ((tempval & (DMACTRL_GRS | DMACTRL_GTS)) !=
(DMACTRL_GRS | DMACTRL_GTS)) {
int ret;
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&regs->dmactrl, tempval);
tempval |= (DMACTRL_GRS | DMACTRL_GTS);
gfar_write(&regs->dmactrl, tempval);
do {
ret = spin_event_timeout(((gfar_read(&regs->ievent) &
(IEVENT_GRSC | IEVENT_GTSC)) ==
(IEVENT_GRSC | IEVENT_GTSC)), 1000000, 0);
if (!ret && !(gfar_read(&regs->ievent) & IEVENT_GRSC))
ret = __gfar_is_rx_idle(priv);
} while (!ret);
retry:
timeout = 1000;
while (!(stopped = gfar_is_dma_stopped(priv)) && timeout) {
cpu_relax();
timeout--;
}
if (!timeout)
stopped = gfar_is_dma_stopped(priv);
if (!stopped && !gfar_is_rx_dma_stopped(priv) &&
!__gfar_is_rx_idle(priv))
goto retry;
}
/* Halt the receive and transmit queues */

15
drivers/net/ethernet/freescale/gianfar.h
View File

@ -1226,6 +1226,21 @@ static inline void gfar_write_isrg(struct gfar_private *priv)
}
}
static inline int gfar_is_dma_stopped(struct gfar_private *priv)
{
struct gfar __iomem *regs = priv->gfargrp[0].regs;
return ((gfar_read(&regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC)) ==
(IEVENT_GRSC | IEVENT_GTSC));
}
static inline int gfar_is_rx_dma_stopped(struct gfar_private *priv)
{
struct gfar __iomem *regs = priv->gfargrp[0].regs;
return gfar_read(&regs->ievent) & IEVENT_GRSC;
}
irqreturn_t gfar_receive(int irq, void *dev_id);
int startup_gfar(struct net_device *dev);
void stop_gfar(struct net_device *dev);