os/drivers: add support for NDP120 mic drivers

Signed-off-by: Abhishek Akkabathula <[email protected]>

os/Directories.mk

@@ -274,3 +274,6 @@ KERNDEPDIRS += se
 endif
 CLEANDIRS += se
 
+ifeq ($(CONFIG_NDP120),y)
+CONTEXTDIRS += drivers
+endif

os/board/rtl8730e/src/Make.defs

@@ -71,3 +71,7 @@ endif
 ifeq ($(CONFIG_LCD_ST7701SN), y)
 CSRCS += rtl8730e_mipi_lcdc.c
 endif
+
+ifeq ($(CONFIG_AUDIO_NDP120),y)
+CSRCS += rtl8730e_ndp120.c
+endif

os/board/rtl8730e/src/rtl8730e_boot.c

@@ -484,6 +484,13 @@ void board_initialize(void)
 #ifdef CONFIG_AUDIO_ALC1019
 	rtl8730e_alc1019_initialize(0);
 #endif
+
+#ifdef CONFIG_AUDIO_NDP120
+	if (rtl8730e_ndp120_initialize(0) != 0) {
+		lldbg("NDP120 initialization failed\n");
+	}
+ #endif
+
 	IPC_MSG_STRUCT ipc_msg_loguart;
 
 	ipc_msg_loguart.msg_type = IPC_USER_POINT;

os/board/rtl8730e/src/rtl8730e_ndp120.c

@@ -0,0 +1,184 @@
+/****************************************************************************
+ *
+ * Copyright 2023 Samsung Electronics All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ****************************************************************************/
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <tinyara/config.h>
+
+#include <stdbool.h>
+#include <stdio.h>
+#include <debug.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <tinyara/irq.h>
+#include <tinyara/audio/ndp120.h>
+#include <tinyara/gpio.h>
+#include "gpio_irq_api.h"
+#include <tinyara/audio/ndp120.h>
+
+#include "objects.h"
+#include "PinNames.h"
+#include "gpio_api.h"
+
+#ifdef CONFIG_AUDIO_NDP120
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define NDP120_AVAILABLE_MINOR_MIN	0
+#define NDP120_AVAILABLE_MINOR_MAX	25
+
+/* spi config */
+#define NDP120_SPI_PORT			0
+#define NDP120_SPI_FREQ			12000000
+#define NDP120_SPI_BPW			8
+#define NDP120_SPI_CS			0
+#define NDP120_SPI_MODE			SPIDEV_MODE0
+
+/****************************************************************************
+ * Private Types
+ ****************************************************************************/
+struct rtl8730e_ndp120_audioinfo_s {
+	struct ndp120_lower_s lower;
+	ndp120_handler_t handler;
+	gpio_irq_t data_ready;
+};
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+static struct rtl8730e_ndp120_audioinfo_s g_ndp120info = {
+	.lower = {
+		.spi_config = {
+                        .bpw = NDP120_SPI_BPW,
+                        .freq = NDP120_SPI_FREQ,
+                        .cs = NDP120_SPI_CS,
+                        .mode = NDP120_SPI_MODE,
+                },
+	},
+
+	.handler = NULL,
+};
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+static void rtl8730e_ndp120_irq_handler(uint32_t id, gpio_irq_event event)
+{
+	/* we are using level based interrupt trigger here,
+	 * so, we have to disable this particular gpio interrupt
+	 * until we finish this particular interrupt related work
+	 * in the HPWORK thread
+	 */
+	gpio_irq_disable(&g_ndp120info.data_ready);
+
+	if (g_ndp120info.handler != NULL) {
+		g_ndp120info.handler(id);
+	} else {
+		gpio_irq_enable(&g_ndp120info.data_ready);
+	}
+}
+
+static void rtl8730e_ndp120_enable_irq(bool enable)
+{
+	if (enable) {
+		gpio_irq_enable(&g_ndp120info.data_ready);
+	} else {
+		gpio_irq_disable(&g_ndp120info.data_ready);
+	}
+}
+
+static void rtl8730e_ndp120_irq_attach(ndp120_handler_t handler, FAR char *arg)
+{
+	g_ndp120info.handler = handler;
+	gpio_irq_init(&g_ndp120info.data_ready, PA_23, rtl8730e_ndp120_irq_handler, arg);
+	gpio_irq_set(&g_ndp120info.data_ready, IRQ_FALL_RISE, 1);
+	gpio_irq_enable(&g_ndp120info.data_ready);
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: rtl8730e_ndp120_initialize
+ *
+ * Description:
+ *   This function is called by platform-specific, setup logic to configure
+ *   and register the NDP120 device.  This function will register the driver
+ *   as /dev/ndp120[x] where x is determined by the minor device number.
+ *
+ * Input Parameters:
+ *   minor - The input device minor number
+ *
+ * Returned Value:
+ *   Zero is returned on success.  Otherwise, a negated errno value is
+ *   returned to indicate the nature of the failure.
+ *
+ ****************************************************************************/
+int rtl8730e_ndp120_initialize(int minor)
+{
+	FAR struct audio_lowerhalf_s *ndp120;
+	static bool initialized = false;
+	char devname[12];
+	int ret;
+
+	audvdbg("minor %d\n", minor);
+	DEBUGASSERT(minor >= NDP120_AVAILABLE_MINOR_MIN && minor <= NDP120_AVAILABLE_MINOR_MAX);
+
+	/* Have we already initialized?  Since we never uninitialize we must prevent
+	 * multiple initializations.  This is necessary, for example, when the
+	 * touchscreen example is used as a built-in application in NSH and can be
+	 * called numerous time.  It will attempt to initialize each time.
+	 */
+
+	if (!initialized) {
+
+		g_ndp120info.lower.attach = rtl8730e_ndp120_irq_attach;
+		g_ndp120info.lower.irq_enable = rtl8730e_ndp120_enable_irq;
+
+		/* currently spi 0 is only attached to AI SoC, so no
+		 * need to change the spi config as we are dealing with
+		 * only 1 slave, if we add more slaves, parameters below
+		 * should be set always before the transfers and must be
+		 * passed to lower level using spi_config in ndp120_lower_s.
+		 */
+		FAR struct spi_dev_s *spi = up_spiinitialize(NDP120_SPI_PORT);
+
+		SPI_SETMODE(spi, NDP120_SPI_MODE);
+		SPI_SETFREQUENCY(spi, NDP120_SPI_FREQ);
+		SPI_SETBITS(spi, NDP120_SPI_BPW);
+
+		ndp120 = ndp120_lowerhalf_initialize(spi, &g_ndp120info.lower);
+		if (ndp120 == NULL) {
+			return ERROR;
+		}
+
+		snprintf(devname, sizeof(devname), "pcmC%uD%u%c", minor, 0, 'c');
+		ret = audio_register(devname, ndp120);
+
+		initialized = true;
+	}
+
+	return ret;
+}
+#endif

os/drivers/Kconfig

@@ -282,6 +282,10 @@ if DRIVERS_VIDEO
 source drivers/video/Kconfig
 endif # DRIVERS_VIDEO
 
+menu "AI SoC devices"
+source drivers/ai-soc/Kconfig
+endmenu
+
 source drivers/lcd/Kconfig
 
 menuconfig BCH

os/drivers/Makefile

@@ -72,6 +72,7 @@ endif
 
 include analog$(DELIM)Make.defs
 include audio$(DELIM)Make.defs
+include ai-soc$(DELIM)Make.defs
 include bch$(DELIM)Make.defs
 include bluetooth$(DELIM)Make.defs
 include compression$(DELIM)Make.defs
@@ -172,6 +173,18 @@ $(BIN): $(OBJS)
 
 depend: .depend
 
+ifeq ($(CONFIG_NDP120),y)
+context:
+	$(eval DEST_DIR = $(TOPDIR)/../tools/fs/contents-smartfs/rtl8730e/base-files/ndp120)
+	@if [ -e $(DEST_DIR) ]; then \
+		rm -rf $(DEST_DIR); \
+		echo "Deleted ndp120 folder from fs"; \
+	fi
+	@mkdir -p $(DEST_DIR)
+	@cp $(TOPDIR)/drivers/ai-soc/ndp120/binaries/* $(TOPDIR)/../tools/fs/contents-smartfs/rtl8730e/base-files/ndp120
+	@echo "NPD120 f/w files copied for generating fs image"
+endif
+
 clean:
 	$(call DELFILE, $(BIN))
 	$(call CLEAN)

os/drivers/ai-soc/Kconfig

@@ -0,0 +1,10 @@
+#
+# For a description of the syntax of this configuration file,
+# see kconfig-language at https://www.kernel.org/doc/Documentation/kbuild/kconfig-language.txt
+
+config NDP120
+	bool "NDP120 AI soc support"
+	default n
+	depends on SPI
+	---help---
+		Select to enable support for the NDP120 AI soc

os/drivers/ai-soc/Make.defs

@@ -0,0 +1,39 @@
+##########################################################################
+#
+# Copyright 2023 Samsung Electronics All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+# either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+#
+############################################################################
+
+ifeq ($(CONFIG_NDP120),y)
+CSRCS += ndp120_api.c
+CSRCS += checksum.c
+CSRCS += syntiant_ndp.c
+CSRCS += syntiant_ndp115.c
+CSRCS += syntiant_ndp120.c
+CSRCS += syntiant_ndp120_config.c
+CSRCS += syntiant_ndp120_config_misc.c
+CSRCS += syntiant_ndp120_mailbox.c
+CSRCS += syntiant_ndp120_ph.c
+CSRCS += syntiant_ndp_error.c
+CSRCS += syntiant_package.c
+CSRCS += syntiant_portability.c
+
+CFLAGS += -I $(TOPDIR)/drivers/ai-soc/ndp120/include -DEXCLUDE_SYNTIANT_CORE_1
+endif
+
+# Include Audio driver support
+
+DEPPATH += --dep-path ai-soc --dep-path ai-soc/ndp120/src
+VPATH += :ai-soc :ai-soc/ndp120/src