1 files changed, 87 insertions, 0 deletions
diff --git a/firmware/target/arm/tms320dm320/dsp/dma.c b/firmware/target/arm/tms320dm320/dsp/dma.c
new file mode 100644
index 0000000000..fe39dc3b21
--- /dev/null
+++ b/firmware/target/arm/tms320dm320/dsp/dma.c
@@ -0,0 +1,87 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2008 by Catalin Patulea
+ * Copyright (C) 2008 by Maurus Cuelenaere
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include "registers.h"
+#include "arm.h"
+#include "dma.h"
+/* This is placed at the right (aligned) address using linker.cmd. */
+#pragma DATA_SECTION (data, ".dma")
+signed short data[PCM_SIZE / 2];
+/* Filled in by loader. */
+unsigned short sdem_addrh;
+unsigned short sdem_addrl;
+interrupt void handle_dma0(void) {
+    unsigned long sdem_addr;
+    /* Byte offset to half-buffer locked by DMA0.
+            0 for top, PCM_SIZE/2(0x4000) for bottom */
+    unsigned short dma0_locked;
+    unsigned short dma0_unlocked;
+    
+    IFR = 1 << 6;
+    /* DMSRC0 is the beginning of the DMA0-locked SARAM half-buffer. */
+    DMSA = 0x00 /* DMSRC0 */;
+    dma0_locked = (DMSDN << 1) & (PCM_SIZE / 2);
+    dma0_unlocked = dma0_locked ^ (PCM_SIZE / 2);
+    
+    /* ARM, decode into same half, in SDRAM. */
+    status.msg = MSG_REFILL;
+    status.payload.refill.topbottom = dma0_locked;
+    int_arm();
+    /* DMAC, copy opposite halves from SDRAM to SARAM. */
+    sdem_addr = ((unsigned long)sdem_addrh << 16 | sdem_addrl) + dma0_unlocked;
+    SDEM_ADDRL = sdem_addr & 0xffff;
+    SDEM_ADDRH = sdem_addr >> 16;
+    DSP_ADDRL = (unsigned short)data + (dma0_unlocked >> 1);
+    DSP_ADDRH = 0;
+    DMA_SIZE = PCM_SIZE / 2;
+    DMA_CTRL = 0;
+    status.payload.refill._DMA_TRG = DMA_TRG;
+    status.payload.refill._SDEM_ADDRH = SDEM_ADDRH;
+    status.payload.refill._SDEM_ADDRL = SDEM_ADDRL;
+    status.payload.refill._DSP_ADDRH = DSP_ADDRH;
+    status.payload.refill._DSP_ADDRL = DSP_ADDRL;
+    DMA_TRG = 1;
+}
+interrupt void handle_dmac(void) {
+    IFR = 1 << 11;
+}
+void dma_init(void) {
+    /* Configure DMA */
+    DMSFC0 = 2 << 12 | 1 << 11; /* Event XEVT0, 32-bit transfers, 0 frame count */
+    DMMCR0 = 1 << 14 | 1 << 13 | /* Interrupts generated, Half and full buffer */
+             1 << 12 | 1 << 8 | 1 << 6 | 1; /* ABU mode,
+                                               From data space with postincrement,
+                                               To data space with no mod */
+    DMSRC0 = (unsigned short)&data;
+    DMDST0 = (unsigned short)&DXR20; /* First of two-word register pair */
+    DMCTR0 = sizeof(data);
+    /* Run, Rudolf, run! (with DMA0 interrupts) */
+    DMPREC = 2 << 6 | 1;
+}

diff --git a/firmware/target/arm/tms320dm320/dsp/dma.c b/firmware/target/arm/tms320dm320/dsp/dma.c new file mode 100644 index 0000000000..fe39dc3b21 --- /dev/null +++ b/firmware/target/arm/tms320dm320/dsp/dma.c
@@ -0,0 +1,87 @@
	1	/***************************************************************************
	2	* __________ __ ___.
	3	* Open \______ \ ____ ____ \| \| _\_ \|__ _______ ___
	4	* Source \| _// _ \_/ ___\\| \|/ /\| __ \ / _ \ \/ /
	5	* Jukebox \| \| ( <_> ) \___\| < \| \_\ ( <_> > < <
	6	* Firmware \|____\|_ /\____/ \___ >__\|_ \\|___ /\____/__/\_ \
	7	* \/ \/ \/ \/ \/
	8	* $Id$
	9	*
	10	* Copyright (C) 2008 by Catalin Patulea
	11	* Copyright (C) 2008 by Maurus Cuelenaere
	12	*
	13	* All files in this archive are subject to the GNU General Public License.
	14	* See the file COPYING in the source tree root for full license agreement.
	15	*
	16	* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
	17	* KIND, either express or implied.
	18	*
	19	****************************************************************************/
	20
	21	#include "registers.h"
	22	#include "arm.h"
	23	#include "dma.h"
	24
	25	/* This is placed at the right (aligned) address using linker.cmd. */
	26	#pragma DATA_SECTION (data, ".dma")
	27	signed short data[PCM_SIZE / 2];
	28
	29	/* Filled in by loader. */
	30	unsigned short sdem_addrh;
	31	unsigned short sdem_addrl;
	32
	33	interrupt void handle_dma0(void) {
	34	unsigned long sdem_addr;
	35	/* Byte offset to half-buffer locked by DMA0.
	36	0 for top, PCM_SIZE/2(0x4000) for bottom */
	37	unsigned short dma0_locked;
	38	unsigned short dma0_unlocked;
	39
	40	IFR = 1 << 6;
	41
	42	/* DMSRC0 is the beginning of the DMA0-locked SARAM half-buffer. */
	43	DMSA = 0x00 /* DMSRC0 */;
	44	dma0_locked = (DMSDN << 1) & (PCM_SIZE / 2);
	45	dma0_unlocked = dma0_locked ^ (PCM_SIZE / 2);
	46
	47	/* ARM, decode into same half, in SDRAM. */
	48	status.msg = MSG_REFILL;
	49	status.payload.refill.topbottom = dma0_locked;
	50	int_arm();
	51
	52	/* DMAC, copy opposite halves from SDRAM to SARAM. */
	53	sdem_addr = ((unsigned long)sdem_addrh << 16 \| sdem_addrl) + dma0_unlocked;
	54	SDEM_ADDRL = sdem_addr & 0xffff;
	55	SDEM_ADDRH = sdem_addr >> 16;
	56	DSP_ADDRL = (unsigned short)data + (dma0_unlocked >> 1);
	57	DSP_ADDRH = 0;
	58	DMA_SIZE = PCM_SIZE / 2;
	59	DMA_CTRL = 0;
	60
	61	status.payload.refill._DMA_TRG = DMA_TRG;
	62	status.payload.refill._SDEM_ADDRH = SDEM_ADDRH;
	63	status.payload.refill._SDEM_ADDRL = SDEM_ADDRL;
	64	status.payload.refill._DSP_ADDRH = DSP_ADDRH;
	65	status.payload.refill._DSP_ADDRL = DSP_ADDRL;
	66
	67	DMA_TRG = 1;
	68	}
	69
	70	interrupt void handle_dmac(void) {
	71	IFR = 1 << 11;
	72	}
	73
	74	void dma_init(void) {
	75	/* Configure DMA */
	76	DMSFC0 = 2 << 12 \| 1 << 11; /* Event XEVT0, 32-bit transfers, 0 frame count */
	77	DMMCR0 = 1 << 14 \| 1 << 13 \| /* Interrupts generated, Half and full buffer */
	78	1 << 12 \| 1 << 8 \| 1 << 6 \| 1; /* ABU mode,
	79	From data space with postincrement,
	80	To data space with no mod */
	81	DMSRC0 = (unsigned short)&data;
	82	DMDST0 = (unsigned short)&DXR20; /* First of two-word register pair */
	83	DMCTR0 = sizeof(data);
	84
	85	/* Run, Rudolf, run! (with DMA0 interrupts) */
	86	DMPREC = 2 << 6 \| 1;
	87	}