spi edma tx working

Signed-off-by: surenyi <surenyi82@qq.com>

include/edma.h

@@ -0,0 +1,15 @@
+#ifndef __EDMA__WRAPPER_H__
+#define __EDMA__WRAPPER_H__
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int edma_set_irq(int vect_id);
+int edma_attach_tcc_irq(int tccNum, void (*func)(int tccNum));
+int edma_dettach_tcc_irq(int tccNum);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
+

include/platform.h

@@ -11,8 +11,10 @@ extern "C" {
 #include "csl/csl_emifa.h"
 #include "csl/csl_mcbsp.h"
 #include "csl/csl_cache.h"
+#include "csl/csl_edma.h"
 #include "tick.h"
 #include "irq.h"
+#include "edma.h"
 
 #ifndef ARRAY_SIZE
 #define ARRAY_SIZE(x) ((sizeof (x)) / (sizeof ((x)[0])))

include/spi.h

@@ -16,6 +16,8 @@ int spi_open(int dev_id, int mode, int  freq, int bits);
 int spi_write(int dev_id, const void *buf, int len);
 int spi_read(int dev_id, void *buf, int len);
 
+int spi_edma_write(int dev_id, const void *buf, int len, void (*notify)(void *args), void *args);
+
 void  spi_close(int dev_id);
 
 int i2s_slave_open(int dev_id, int bits);

src/CMakeLists.txt

@@ -7,6 +7,7 @@ set(sdk_srcs
 	spi.c
 	timer.c
 	console.c
+	edma.c
 	vecs.asm
 	bfsk/tone.c
 	bfsk/fsk_tx.c

src/bfsk/simpleaudio_mcbsp.c

@@ -41,11 +41,29 @@ static int mcbsp_read( simpleaudio *sa, void *buf, unsigned int nframes )
 	return nframes;
 }
 
+static volatile int busy = 0;
+static void __write_done(void *args)
+{
+	busy = 0;
+}
+
 static int mcbsp_write(simpleaudio *sa, void *buf, unsigned int nframes )
 {
 	int handle = (int)sa->backend_handle;
+	int n, tot_bytes = nframes * sa->backend_framesize;
+	char *ptr = buf;
 
-	spi_write(handle, buf, nframes * 2);
+	busy = 0;
+	while (tot_bytes > 0) {
+		while (busy)
+			;
+		busy = 1;
+		n = spi_edma_write(handle, ptr, tot_bytes, __write_done, sa);
+		if (n < 0)
+			break;
+		tot_bytes -= n;
+		ptr += n;
+	}
 	return nframes;
 }
 

src/edma.c

@@ -0,0 +1,24 @@
+#include "platform_internal.h"
+
+int edma_set_irq(int vect_id)
+{
+	return irq_attach(vect_id, IRQ_EVT_EDMAINT, EDMA_intDispatcher, NULL);
+}
+
+int edma_attach_tcc_irq(int tccNum, void (*func)(int tccNum))
+{
+	EDMA_reset(IRQ_EVT_EDMAINT);
+	EDMA_intDisable(tccNum);
+	EDMA_intHook(tccNum, func);
+	EDMA_intClear(tccNum);
+	EDMA_intEnable(tccNum);
+	return 0;
+}
+
+int edma_dettach_tcc_irq(int tccNum)
+{
+	EDMA_intDisable(tccNum);
+	EDMA_intHook(tccNum, EDMA_intDefaultHandler);
+	return 0;
+}
+

src/platform.c

@@ -8,6 +8,8 @@ int platform_init()
 	spi_lowlevel_init();
 	timer_lowlevel_init();
 
+	/* clear edma PaRam */
+	EDMA_clearPram(0x00000000);
 	platform_pre_init();
 
 	IRQ_setVecs(vectors);

src/platform_internal.h

@@ -1,5 +1,6 @@
 #ifndef __PLATFORM_INTERNAL_H__
 #define __PLATFORM_INTERNAL_H__
+#include <stddef.h>
 #include "platform.h"
 
 far void vectors();

src/spi.c

@@ -1,11 +1,27 @@
 #include <string.h>
+#include <stdlib.h>
 #include "platform_internal.h"
 #include "spi.h"
 
+#define TXBUF_SIZE (1024)
+#define RXBUF_SIZE (1024)
+
 typedef struct __spi_handle *spi_t;
 struct __spi_handle {
 	MCBSP_Handle spi;
 	int bits;
+
+	/* tx */
+	EDMA_Handle xh;
+	void (*xnotify)(void *args);
+	void *xargs;
+	char  xbuf[TXBUF_SIZE];
+
+	/* rx */
+	EDMA_Handle rh;
+	void (*rnotify)(void *args);
+	void *rargs;
+	char  rbuf[RXBUF_SIZE];
 };
 
 static struct __spi_handle  __spi_devs[_MCBSP_PORT_CNT];
@@ -15,6 +31,33 @@ void spi_lowlevel_init()
 	memset(__spi_devs, 0, sizeof __spi_devs);
 }
 
+static spi_t __find_spi_with_xtcc(int tccNum)
+{
+	int i;
+	spi_t spi;
+	for (i = 0; i < _MCBSP_PORT_CNT; ++i) {
+		spi = &__spi_devs[i];
+		if (MCBSP_getXmtEventId(spi->spi) == tccNum) {
+			return spi;
+		}
+	}
+	return NULL;
+}
+
+static void __tx_notify(int tccNum)
+{
+	spi_t spi;
+
+	EDMA_intClear(tccNum);
+
+	spi = __find_spi_with_xtcc(tccNum);
+	if (spi) {
+		EDMA_disableChannel(spi->xh);
+		if (spi->xnotify)
+			spi->xnotify(spi->xargs);
+	}
+}
+
 static Uint32 __parse_to_dlen1(int bits)
 {
 	Uint32 dlen1;
@@ -45,7 +88,6 @@ static Uint32 __parse_to_dlen1(int bits)
 	return (dlen1);
 }
 
-
 int i2s_slave_open(int dev_id, int bits)
 {
 	MCBSP_Config mbconf;
@@ -160,8 +202,7 @@ int i2s_slave_open(int dev_id, int bits)
 	MCBSP_config(handle, &mbconf);
 
 	//Enable McBSP in steps
-	MCBSP_start(handle, 
-			MCBSP_RCV_START | MCBSP_XMIT_START | MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,
+	MCBSP_start(handle, MCBSP_RCV_START | MCBSP_XMIT_START | MCBSP_SRGR_START | MCBSP_SRGR_FRAMESYNC,
 			MCBSP_SRGR_DEFAULT_DELAY);
 	return 0;
 }
@@ -400,6 +441,86 @@ int spi_write(int dev_id, const void *buf, int len)
 	return (len);
 }
 
+int spi_edma_write(int dev_id, const void *buf, int len, void (*notify)(void *args), void *args)
+{
+	spi_t spi;
+	Uint32 esize;
+	EDMA_Config edma_conf;
+	int slen, xevent;
+
+	if ((spi = __get_active_device(dev_id)) == NULL) {
+		return -2;
+	}
+
+	spi = &__spi_devs[dev_id];
+	if (len > TXBUF_SIZE) {
+		len = TXBUF_SIZE;
+	}
+
+	slen = len;
+	memcpy(spi->xbuf, buf, len);
+
+	switch (spi->bits) {
+		case 8:
+			esize = EDMA_OPT_ESIZE_8BIT;
+			break;
+		case 12:
+		case 16:
+			esize = EDMA_OPT_ESIZE_16BIT;
+			len /= 2;
+			break;
+		case 20:
+		case 24:
+		case 32:
+			esize = EDMA_OPT_ESIZE_32BIT;
+			len /= 4;
+			break;
+		default:
+			return (-2);
+	}
+
+	CACHE_wbL2(spi->xbuf, len, CACHE_WAIT);
+
+	xevent = MCBSP_getXmtEventId(spi->spi);
+
+	edma_conf.opt = EDMA_OPT_RMK(
+			EDMA_OPT_PRI_MEDIUM,
+			esize,
+			EDMA_OPT_2DS_NO,
+			EDMA_OPT_SUM_INC,
+			EDMA_OPT_2DD_NO,
+			EDMA_OPT_DUM_NONE,
+			EDMA_OPT_TCINT_YES,
+			EDMA_OPT_TCC_OF(xevent),
+			EDMA_OPT_TCCM_OF(xevent >> 4),
+			EDMA_OPT_ATCINT_NO,
+			EDMA_OPT_ATCC_OF(0),
+			EDMA_OPT_PDTS_DEFAULT,
+			EDMA_OPT_PDTS_DEFAULT,
+			EDMA_OPT_LINK_NO,
+			EDMA_OPT_FS_NO
+			);
+	edma_conf.src = EDMA_SRC_RMK((Uint32)(spi->xbuf));
+	edma_conf.cnt = EDMA_CNT_RMK(0, len);
+	edma_conf.dst = EDMA_DST_OF(MCBSP_getXmtAddr(spi->spi));
+	edma_conf.idx = EDMA_IDX_RMK(0, 0);
+	edma_conf.rld = EDMA_RLD_RMK(0, 0);
+
+	spi->xnotify  = notify;
+	spi->xargs    = args;
+
+	if (spi->xh == NULL)
+		spi->xh = EDMA_open(xevent, 0);
+
+	edma_attach_tcc_irq(xevent, __tx_notify);
+
+	EDMA_config(spi->xh, &edma_conf);
+
+	EDMA_enableChannel(spi->xh);
+
+	return (slen);
+}
+
 static int __read_u8(spi_t spi, Uint8 *buf, int len)
 {
 	int i;