From 493958c9cf11eaa25251d91e9ecab9a28bd6d68f Mon Sep 17 00:00:00 2001 From: "Suren A. Chilingaryan" Date: Tue, 12 Jul 2011 14:39:06 +0200 Subject: Provide IRQ enable/disable call --- dma/nwl_irq.c | 42 ++++++++++++++++++++++++++++++++++++++---- 1 file changed, 38 insertions(+), 4 deletions(-) (limited to 'dma/nwl_irq.c') diff --git a/dma/nwl_irq.c b/dma/nwl_irq.c index 51705ff..04ac908 100644 --- a/dma/nwl_irq.c +++ b/dma/nwl_irq.c @@ -13,12 +13,39 @@ #include "nwl.h" #include "nwl_defines.h" -int dma_nwl_enable_irq(nwl_dma_t *ctx, pcilib_irq_type_t type) { +int dma_nwl_init_irq(nwl_dma_t *ctx, uint32_t val) { + if (val&(DMA_INT_ENABLE|DMA_USER_INT_ENABLE)) { + if (val&DMA_INT_ENABLE) ctx->irq_preserve |= PCILIB_DMA_IRQ; + if (val&DMA_USER_INT_ENABLE) ctx->irq_preserve |= PCILIB_EVENT_IRQ; + } + + ctx->irq_init = 1; + return 0; +} + +int dma_nwl_free_irq(nwl_dma_t *ctx) { + if (ctx->irq_init) { + dma_nwl_disable_irq((pcilib_dma_context_t*)ctx, 0); + if (ctx->irq_preserve) dma_nwl_enable_irq((pcilib_dma_context_t*)ctx, ctx->irq_preserve, 0); + ctx->irq_enabled = 0; + ctx->irq_init = 0; + } + return 0; +} + +int dma_nwl_enable_irq(pcilib_dma_context_t *vctx, pcilib_irq_type_t type, pcilib_dma_flags_t flags) { uint32_t val; + nwl_dma_t *ctx = (nwl_dma_t*)vctx; - if (ctx->irq_enabled == type) return 0; + if (flags&PCILIB_DMA_FLAG_PERMANENT) ctx->irq_preserve |= type; + if (ctx->irq_enabled == type) return 0; + + type |= ctx->irq_enabled; + nwl_read_register(val, ctx, ctx->base_addr, REG_DMA_CTRL_STATUS); + if (!ctx->irq_init) dma_nwl_init_irq(ctx, val); + val &= ~(DMA_INT_ENABLE|DMA_USER_INT_ENABLE); nwl_write_register(val, ctx, ctx->base_addr, REG_DMA_CTRL_STATUS); @@ -33,22 +60,28 @@ int dma_nwl_enable_irq(nwl_dma_t *ctx, pcilib_irq_type_t type) { return 0; } -int dma_nwl_disable_irq(nwl_dma_t *ctx) { + +int dma_nwl_disable_irq(pcilib_dma_context_t *vctx, pcilib_dma_flags_t flags) { uint32_t val; + nwl_dma_t *ctx = (nwl_dma_t*)vctx; ctx->irq_enabled = 0; nwl_read_register(val, ctx, ctx->base_addr, REG_DMA_CTRL_STATUS); + if (!ctx->irq_init) dma_nwl_init_irq(ctx, val); val &= ~(DMA_INT_ENABLE|DMA_USER_INT_ENABLE); nwl_write_register(val, ctx, ctx->base_addr, REG_DMA_CTRL_STATUS); + if (flags&PCILIB_DMA_FLAG_PERMANENT) ctx->irq_preserve = 0; + return 0; } + int dma_nwl_enable_engine_irq(nwl_dma_t *ctx, pcilib_dma_engine_t dma) { uint32_t val; - dma_nwl_enable_irq(ctx, ctx->irq_enabled|PCILIB_DMA_IRQ); + dma_nwl_enable_irq(ctx, ctx->irq_enabled|PCILIB_DMA_IRQ, 0); nwl_read_register(val, ctx, ctx->engines[dma].base_addr, REG_DMA_ENG_CTRL_STATUS); val |= (DMA_ENG_INT_ENABLE); @@ -68,4 +101,5 @@ int dma_nwl_disable_engine_irq(nwl_dma_t *ctx, pcilib_dma_engine_t dma) { } + // ACK -- cgit v1.2.3