diff options
Diffstat (limited to 'arch/arm/plat-pxa')
| -rw-r--r-- | arch/arm/plat-pxa/dma.c | 22 | ||||
| -rw-r--r-- | arch/arm/plat-pxa/include/plat/dma.h | 15 |
2 files changed, 26 insertions, 11 deletions
diff --git a/arch/arm/plat-pxa/dma.c b/arch/arm/plat-pxa/dma.c index d92f07f6e..de2b06188 100644 --- a/arch/arm/plat-pxa/dma.c +++ b/arch/arm/plat-pxa/dma.c @@ -289,7 +289,8 @@ int pxa_request_dma (char *name, pxa_dma_prio prio, /* try grabbing a DMA channel with the requested priority */ for (i = 0; i < num_dma_channels; i++) { if ((dma_channels[i].prio == prio) && - !dma_channels[i].name) { + !dma_channels[i].name && + !pxad_toggle_reserved_channel(i)) { found = 1; break; } @@ -326,13 +327,14 @@ void pxa_free_dma (int dma_ch) local_irq_save(flags); DCSR(dma_ch) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; dma_channels[dma_ch].name = NULL; + pxad_toggle_reserved_channel(dma_ch); local_irq_restore(flags); } EXPORT_SYMBOL(pxa_free_dma); static irqreturn_t dma_irq_handler(int irq, void *dev_id) { - int i, dint = DINT; + int i, dint = DINT, done = 0; struct dma_channel *channel; while (dint) { @@ -341,16 +343,13 @@ static irqreturn_t dma_irq_handler(int irq, void *dev_id) channel = &dma_channels[i]; if (channel->name && channel->irq_handler) { channel->irq_handler(i, channel->data); - } else { - /* - * IRQ for an unregistered DMA channel: - * let's clear the interrupts and disable it. - */ - printk (KERN_WARNING "spurious IRQ for DMA channel %d\n", i); - DCSR(i) = DCSR_STARTINTR|DCSR_ENDINTR|DCSR_BUSERR; + done++; } } - return IRQ_HANDLED; + if (done) + return IRQ_HANDLED; + else + return IRQ_NONE; } int __init pxa_init_dma(int irq, int num_ch) @@ -372,7 +371,8 @@ int __init pxa_init_dma(int irq, int num_ch) spin_lock_init(&dma_channels[i].lock); } - ret = request_irq(irq, dma_irq_handler, 0, "DMA", NULL); + ret = request_irq(irq, dma_irq_handler, IRQF_SHARED, "DMA", + dma_channels); if (ret) { printk (KERN_CRIT "Wow! Can't register IRQ for DMA\n"); kfree(dma_channels); diff --git a/arch/arm/plat-pxa/include/plat/dma.h b/arch/arm/plat-pxa/include/plat/dma.h index a7b91dc06..28848b344 100644 --- a/arch/arm/plat-pxa/include/plat/dma.h +++ b/arch/arm/plat-pxa/include/plat/dma.h @@ -82,4 +82,19 @@ int pxa_request_dma (char *name, void pxa_free_dma (int dma_ch); +/* + * Cooperation with pxa_dma + dmaengine while there remains at least one pxa + * driver not converted to dmaengine. + */ +#if defined(CONFIG_PXA_DMA) +extern int pxad_toggle_reserved_channel(int legacy_channel); +#else +static inline int pxad_toggle_reserved_channel(int legacy_channel) +{ + return 0; +} +#endif + +extern void __init pxa2xx_set_dmac_info(int nb_channels); + #endif /* __PLAT_DMA_H */ |