diff options
Diffstat (limited to 'arch/blackfin/kernel')
| -rw-r--r-- | arch/blackfin/kernel/bfin_dma_5xx.c | 204 |
1 files changed, 200 insertions, 4 deletions
diff --git a/arch/blackfin/kernel/bfin_dma_5xx.c b/arch/blackfin/kernel/bfin_dma_5xx.c index 14314240718e..1c344acfd487 100644 --- a/arch/blackfin/kernel/bfin_dma_5xx.c +++ b/arch/blackfin/kernel/bfin_dma_5xx.c @@ -130,7 +130,9 @@ static int __init blackfin_dma_init(void) dma_ch[i].regs = base_addr[i]; mutex_init(&(dma_ch[i].dmalock)); } - + /* Mark MEMDMA Channel 0 as requested since we're using it internally */ + dma_ch[CH_MEM_STREAM0_DEST].chan_status = DMA_CHANNEL_REQUESTED; + dma_ch[CH_MEM_STREAM0_SRC].chan_status = DMA_CHANNEL_REQUESTED; return 0; } @@ -598,9 +600,12 @@ void *dma_memcpy(void *dest, const void *src, size_t size) int direction; /* 1 - address decrease, 0 - address increase */ int flag_align; /* 1 - address aligned, 0 - address unaligned */ int flag_2D; /* 1 - 2D DMA needed, 0 - 1D DMA needed */ + unsigned long flags; if (size <= 0) return NULL; + + local_irq_save(flags); if ((unsigned long)src < memory_end) blackfin_dcache_flush_range((unsigned int)src, @@ -725,6 +730,7 @@ void *dma_memcpy(void *dest, const void *src, size_t size) if ((unsigned long)dest < memory_end) blackfin_dcache_invalidate_range((unsigned int)dest, (unsigned int)(dest + size)); + local_irq_restore(flags); return dest; } @@ -732,11 +738,201 @@ EXPORT_SYMBOL(dma_memcpy); void *safe_dma_memcpy(void *dest, const void *src, size_t size) { - int flags = 0; void *addr; - local_irq_save(flags); addr = dma_memcpy(dest, src, size); - local_irq_restore(flags); return addr; } EXPORT_SYMBOL(safe_dma_memcpy); + +void dma_outsb(void __iomem *addr, const void *buf, unsigned short len) +{ + + unsigned long flags; + + local_irq_save(flags); + + blackfin_dcache_flush_range((unsigned int)buf,(unsigned int)(buf) + len); + + bfin_write_MDMA_D0_START_ADDR(addr); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(buf); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(1); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_8); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_8); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_outsb); + + +void dma_insb(const void __iomem *addr, void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + bfin_write_MDMA_D0_START_ADDR(buf); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(1); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(addr); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(0); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_8); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_8); + + blackfin_dcache_invalidate_range((unsigned int)buf, (unsigned int)(buf) + len); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_insb); + +void dma_outsw(void __iomem *addr, const void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + blackfin_dcache_flush_range((unsigned int)buf,(unsigned int)(buf) + len); + + bfin_write_MDMA_D0_START_ADDR(addr); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(buf); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(2); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_outsw); + +void dma_insw(const void __iomem *addr, void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + bfin_write_MDMA_D0_START_ADDR(buf); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(2); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(addr); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(0); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_16); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_16); + + blackfin_dcache_invalidate_range((unsigned int)buf, (unsigned int)(buf) + len); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_insw); + +void dma_outsl(void __iomem *addr, const void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + blackfin_dcache_flush_range((unsigned int)buf,(unsigned int)(buf) + len); + + bfin_write_MDMA_D0_START_ADDR(addr); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(0); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(buf); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(4); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_32); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_32); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_outsl); + +void dma_insl(const void __iomem *addr, void *buf, unsigned short len) +{ + unsigned long flags; + + local_irq_save(flags); + + bfin_write_MDMA_D0_START_ADDR(buf); + bfin_write_MDMA_D0_X_COUNT(len); + bfin_write_MDMA_D0_X_MODIFY(4); + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_START_ADDR(addr); + bfin_write_MDMA_S0_X_COUNT(len); + bfin_write_MDMA_S0_X_MODIFY(0); + bfin_write_MDMA_S0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(DMAEN | WDSIZE_32); + bfin_write_MDMA_D0_CONFIG(WNR | DI_EN | DMAEN | WDSIZE_32); + + blackfin_dcache_invalidate_range((unsigned int)buf, (unsigned int)(buf) + len); + + while (!(bfin_read_MDMA_D0_IRQ_STATUS() & DMA_DONE)); + + bfin_write_MDMA_D0_IRQ_STATUS(DMA_DONE | DMA_ERR); + + bfin_write_MDMA_S0_CONFIG(0); + bfin_write_MDMA_D0_CONFIG(0); + local_irq_restore(flags); + +} +EXPORT_SYMBOL(dma_insl); |