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Diffstat (limited to 'arch/mips/include/asm/mach-rc32434/dma_v.h')
-rw-r--r--arch/mips/include/asm/mach-rc32434/dma_v.h53
1 files changed, 53 insertions, 0 deletions
diff --git a/arch/mips/include/asm/mach-rc32434/dma_v.h b/arch/mips/include/asm/mach-rc32434/dma_v.h
new file mode 100644
index 000000000..37d73b987
--- /dev/null
+++ b/arch/mips/include/asm/mach-rc32434/dma_v.h
@@ -0,0 +1,53 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright 2002 Integrated Device Technology, Inc.
+ * All rights reserved.
+ *
+ * DMA register definition.
+ *
+ * Author : ryan.holmQVist@idt.com
+ * Date : 20011005
+ */
+
+#ifndef _ASM_RC32434_DMA_V_H_
+#define _ASM_RC32434_DMA_V_H_
+
+#include <asm/mach-rc32434/dma.h>
+#include <asm/mach-rc32434/rc32434.h>
+
+#define DMA_CHAN_OFFSET 0x14
+#define IS_DMA_USED(X) (((X) & \
+ (DMA_DESC_FINI | DMA_DESC_DONE | DMA_DESC_TERM)) \
+ != 0)
+#define DMA_COUNT(count) ((count) & DMA_DESC_COUNT_MSK)
+
+#define DMA_HALT_TIMEOUT 500
+
+static inline int rc32434_halt_dma(struct dma_reg *ch)
+{
+ int timeout = 1;
+ if (__raw_readl(&ch->dmac) & DMA_CHAN_RUN_BIT) {
+ __raw_writel(0, &ch->dmac);
+ for (timeout = DMA_HALT_TIMEOUT; timeout > 0; timeout--) {
+ if (__raw_readl(&ch->dmas) & DMA_STAT_HALT) {
+ __raw_writel(0, &ch->dmas);
+ break;
+ }
+ }
+ }
+
+ return timeout ? 0 : 1;
+}
+
+static inline void rc32434_start_dma(struct dma_reg *ch, u32 dma_addr)
+{
+ __raw_writel(0, &ch->dmandptr);
+ __raw_writel(dma_addr, &ch->dmadptr);
+}
+
+static inline void rc32434_chain_dma(struct dma_reg *ch, u32 dma_addr)
+{
+ __raw_writel(dma_addr, &ch->dmandptr);
+}
+
+#endif /* _ASM_RC32434_DMA_V_H_ */