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Revert "dmaengine: pxa_dma: add support for legacy transition"

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This reverts commit c91134d919.

The conversion of the pxa architecture is now finished for all
drivers, so this functions has fullfilled its purpose and can
now be removed.

Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Robert Jarzmik 2016-10-18 08:46:32 +02:00 committed by Vinod Koul
parent 1001354ca3
commit 556195f492
1 changed files with 0 additions and 28 deletions
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28
drivers/dma/pxa_dma.c
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@ -413,15 +413,6 @@ static inline void pxad_init_debugfs(struct pxad_device *pdev) {}
static inline void pxad_cleanup_debugfs(struct pxad_device *pdev) {}
#endif
/*
* In the transition phase where legacy pxa handling is done at the same time as
* mmp_dma, the DMA physical channel split between the 2 DMA providers is done
* through legacy_reserved. Legacy code reserves DMA channels by settings
* corresponding bits in legacy_reserved.
*/
static u32 legacy_reserved;
static u32 legacy_unavailable;
static struct pxad_phy *lookup_phy(struct pxad_chan *pchan)
{
int prio, i;
@ -442,14 +433,10 @@ static struct pxad_phy *lookup_phy(struct pxad_chan *pchan)
for (i = 0; i < pdev->nr_chans; i++) {
if (prio != (i & 0xf) >> 2)
continue;
if ((i < 32) && (legacy_reserved & BIT(i)))
continue;
phy = &pdev->phys[i];
if (!phy->vchan) {
phy->vchan = pchan;
found = phy;
if (i < 32)
legacy_unavailable |= BIT(i);
goto out_unlock;
}
}
@ -469,7 +456,6 @@ static void pxad_free_phy(struct pxad_chan *chan)
struct pxad_device *pdev = to_pxad_dev(chan->vc.chan.device);
unsigned long flags;
u32 reg;
int i;
dev_dbg(&chan->vc.chan.dev->device,
"%s(): freeing\n", __func__);
@ -483,9 +469,6 @@ static void pxad_free_phy(struct pxad_chan *chan)
}
spin_lock_irqsave(&pdev->phy_lock, flags);
for (i = 0; i < 32; i++)
if (chan->phy == &pdev->phys[i])
legacy_unavailable &= ~BIT(i);
chan->phy->vchan = NULL;
chan->phy = NULL;
spin_unlock_irqrestore(&pdev->phy_lock, flags);
@ -739,8 +722,6 @@ static irqreturn_t pxad_int_handler(int irq, void *dev_id)
i = __ffs(dint);
dint &= (dint - 1);
phy = &pdev->phys[i];
if ((i < 32) && (legacy_reserved & BIT(i)))
continue;
if (pxad_chan_handler(irq, phy) == IRQ_HANDLED)
ret = IRQ_HANDLED;
}
@ -1522,15 +1503,6 @@ bool pxad_filter_fn(struct dma_chan *chan, void *param)
}
EXPORT_SYMBOL_GPL(pxad_filter_fn);
int pxad_toggle_reserved_channel(int legacy_channel)
{
if (legacy_unavailable & (BIT(legacy_channel)))
return -EBUSY;
legacy_reserved ^= BIT(legacy_channel);
return 0;
}
EXPORT_SYMBOL_GPL(pxad_toggle_reserved_channel);
module_platform_driver(pxad_driver);
MODULE_DESCRIPTION("Marvell PXA Peripheral DMA Driver");