renamed spidma.[ch] to dma.[ch]

2013-08-01 10:56:11 +00:00
parent 4e97215534
commit 8dda70209a
5 changed files with 9 additions and 6 deletions
--- a/BaS_gcc/sources/dma.c
+++ b/BaS_gcc/sources/dma.c
@@ -0,0 +1,95 @@
+/*
+ * dma.c
+ *
+ *  Created on: 27.07.2013
+ *      Author: mfro
+ */
+
+#include "dma.h"
+#include <MCD_dma.h>
+#include "mcd_initiators.h"
+#include "bas_printf.h"
+
+extern char _SYS_SRAM[];
+#define SYS_SRAM &_SYS_SRAM[0]
+
+void *dma_memcpy(void *dst, void *src, size_t n)
+{
+	int ret;
+	int32_t start = MCF_SLT_SCNT(0);
+	int32_t end;
+
+	xprintf("doing memory to memory DMA from %p to %p (%x bytes)\r\n", src, dst, n);
+
+	ret = MCD_startDma(0, src, n, dst, n, n, 1, DMA_ALWAYS, 7, MCD_SINGLE_DMA|MCD_TT_FLAGS_CW|MCD_TT_FLAGS_RL|MCD_TT_FLAGS_SP, 0);
+	if (ret == MCD_OK)
+	{
+		xprintf("DMA on channel 0 successfully started\r\n");
+	}
+
+	do
+	{
+		ret = MCD_dmaStatus(0);
+		switch (ret)
+		{
+		case MCD_NO_DMA:
+			xprintf("MCD_NO_DMA: no DMA active on this channel\r\n");
+			return NULL;
+			break;
+		case MCD_IDLE:
+			xprintf("MCD_IDLE: DMA defined but not active (initiator not ready)\r\n");
+			break;
+		case MCD_RUNNING:
+			//xprintf("MCD_RUNNING: DMA active and working on this channel\r\n");
+			break;
+		case MCD_PAUSED:
+			xprintf("MCD_PAUSED: DMA defined and enabled, but currently paused\r\n");
+			break;
+		case MCD_HALTED:
+			xprintf("MCD_HALTED: DMA killed\r\n");
+			return NULL;
+			break;
+		case MCD_DONE:
+			xprintf("MCD_DONE: DMA finished\r\n");
+			break;
+		case MCD_CHANNEL_INVALID:
+			xprintf("MCD_CHANNEL_INVALID: invalid DMA channel\r\n");
+			return NULL;
+			break;
+		default:
+			xprintf("unknown DMA status %d\r\n", ret);
+			break;
+		}
+	} while (ret != MCD_DONE);
+	xprintf("\r\n");
+
+	end = MCF_SLT_SCNT(0);
+
+	xprintf("took %d ms (1 Mbyte)\r\n", (end - start) / 132);
+#ifdef _NOT_USED_
+	__asm__ __volatile__("move.w	sr,d0\n\t"
+						 "stop		#0x270\n\t"
+						 "move.w	d0,sr": : :);	/* halt CPU until DMA finished */
+#endif /* _NOT_USED_ */
+
+	return dst;
+}
+
+int spidma_init(void)
+{
+	int res;
+
+	res = MCD_initDma((dmaRegs *) &MCF_DMA_TASKBAR, SYS_SRAM, MCD_RELOC_TASKS | MCD_COMM_PREFETCH_EN);
+	if (res != MCD_OK)
+	{
+		xprintf("DMA API initialization failed (0x%x)\r\n", res);
+		return 0;
+	}
+	xprintf("DMA API initialized. Tasks are at %p\r\n", SYS_SRAM);
+
+	// test
+	dma_memcpy((void *) 0x1e000000, (void *) 0x1f000000, 0xf00000);
+	xprintf("DMA finished\r\n");
+	return 1;
+}
+