[RESEND PATCH v2 09/15] ASoC: qcom: qdsp6: Add support to Q6CORE

[srinivas.kandagatla@linaro.org]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch adds support to core apr service, which is used to query
status of other static and dynamic services on the dsp.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/qcom/Kconfig        |   5 +
 sound/soc/qcom/qdsp6/Makefile |   1 +
 sound/soc/qcom/qdsp6/q6core.c | 227 ++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 233 insertions(+)
 create mode 100644 sound/soc/qcom/qdsp6/q6core.c

diff --git a/sound/soc/qcom/Kconfig b/sound/soc/qcom/Kconfig
index 7ebdb879a8a3..121b9c957024 100644
--- a/sound/soc/qcom/Kconfig
+++ b/sound/soc/qcom/Kconfig
@@ -56,11 +56,16 @@ config SND_SOC_QDSP6_ASM
 	tristate
 	default n
 
+config SND_SOC_QDSP6_CORE
+	tristate
+	default n
+
 config SND_SOC_QDSP6
 	tristate "SoC ALSA audio driver for QDSP6"
 	select SND_SOC_QDSP6_AFE
 	select SND_SOC_QDSP6_ADM
 	select SND_SOC_QDSP6_ASM
+	select SND_SOC_QDSP6_CORE
 	help
 	 To add support for MSM QDSP6 Soc Audio.
 	 This will enable sound soc platform specific
diff --git a/sound/soc/qcom/qdsp6/Makefile b/sound/soc/qcom/qdsp6/Makefile
index 49dd3ccab27b..ad7f10691e54 100644
--- a/sound/soc/qcom/qdsp6/Makefile
+++ b/sound/soc/qcom/qdsp6/Makefile
@@ -1,3 +1,4 @@
 obj-$(CONFIG_SND_SOC_QDSP6_AFE) += q6afe.o
 obj-$(CONFIG_SND_SOC_QDSP6_ADM) += q6adm.o
 obj-$(CONFIG_SND_SOC_QDSP6_ASM) += q6asm.o
+obj-$(CONFIG_SND_SOC_QDSP6_CORE) += q6core.o
diff --git a/sound/soc/qcom/qdsp6/q6core.c b/sound/soc/qcom/qdsp6/q6core.c
new file mode 100644
index 000000000000..d4e2dbc62489
--- /dev/null
+++ b/sound/soc/qcom/qdsp6/q6core.c
@@ -0,0 +1,227 @@
+/* SPDX-License-Identifier: GPL-2.0
+* Copyright (c) 2017, Linaro Limited
+*/
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/sched.h>
+#include <linux/jiffies.h>
+#include <linux/wait.h>
+#include <linux/soc/qcom/apr.h>
+#include <linux/platform_device.h>
+#include <sound/asound.h>
+#include "common.h"
+
+#define ADSP_STATE_READY_TIMEOUT_MS    3000
+#define Q6_READY_TIMEOUT_MS 100
+#define AVCS_CMD_ADSP_EVENT_GET_STATE		0x0001290C
+#define AVCS_CMDRSP_ADSP_EVENT_GET_STATE	0x0001290D
+#define AVCS_GET_VERSIONS       0x00012905
+#define AVCS_GET_VERSIONS_RSP   0x00012906
+
+struct avcs_svc_info {
+	uint32_t service_id;
+	uint32_t version;
+} __packed;
+
+struct q6core {
+	struct apr_device *adev;
+	wait_queue_head_t wait;
+	uint32_t avcs_state;
+	int resp_received;
+	uint32_t num_services;
+	struct avcs_svc_info *svcs_info;
+};
+
+static struct apr_device_id static_services[] = {
+	ADSP_AUDIO_APR_DEV("AFE", APR_SVC_AFE),
+	ADSP_AUDIO_APR_DEV("ASM", APR_SVC_ASM),
+	ADSP_AUDIO_APR_DEV("ADM", APR_SVC_ADM),
+	ADSP_AUDIO_APR_DEV("TEST", APR_SVC_TEST_CLIENT),
+	ADSP_AUDIO_APR_DEV("MVM", APR_SVC_ADSP_MVM),
+	ADSP_AUDIO_APR_DEV("CVS", APR_SVC_ADSP_CVS),
+	ADSP_AUDIO_APR_DEV("CVP", APR_SVC_ADSP_CVP),
+	ADSP_AUDIO_APR_DEV("USM", APR_SVC_USM),
+	ADSP_AUDIO_APR_DEV("VIDC", APR_SVC_VIDC),
+	ADSP_AUDIO_APR_DEV("LSM", APR_SVC_LSM),
+};
+
+static int core_callback(struct apr_device *adev, struct apr_client_data *data)
+{
+	struct q6core *core = dev_get_drvdata(&adev->dev);
+	uint32_t *payload;
+
+	switch (data->opcode) {
+	case AVCS_GET_VERSIONS_RSP:
+		payload = data->payload;
+		core->num_services = payload[1];
+
+		if (!core->svcs_info)
+			core->svcs_info = kcalloc(core->num_services,
+						  sizeof(*core->svcs_info),
+						  GFP_ATOMIC);
+		if (!core->svcs_info)
+			return -ENOMEM;
+
+		/* svc info is after 8 bytes */
+		memcpy(core->svcs_info, payload + 2,
+		       core->num_services * sizeof(*core->svcs_info));
+
+		core->resp_received = 1;
+		wake_up(&core->wait);
+
+		break;
+	case AVCS_CMDRSP_ADSP_EVENT_GET_STATE:
+		payload = data->payload;
+		core->avcs_state = payload[0];
+
+		core->resp_received = 1;
+		wake_up(&core->wait);
+		break;
+	default:
+		dev_err(&adev->dev, "Message id from adsp core svc: 0x%x\n",
+			data->opcode);
+		break;
+	}
+
+	return 0;
+}
+
+void q6core_add_service(struct device *dev, uint32_t svc_id, uint32_t version)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(static_services); i++) {
+		if (static_services[i].svc_id == svc_id) {
+			static_services[i].svc_version = version;
+			apr_add_device(dev->parent, &static_services[i]);
+			dev_info(dev,
+				"Adding SVC: %s: id 0x%x API Ver 0x%x:0x%x\n",
+				 static_services[i].name, svc_id,
+				 APR_SVC_MAJOR_VERSION(version),
+				 APR_SVC_MINOR_VERSION(version));
+		}
+	}
+}
+
+static void q6core_add_static_services(struct q6core *core)
+{
+	int i;
+	struct apr_device *adev = core->adev;
+	struct avcs_svc_info *svcs_info = core->svcs_info;
+
+	for (i = 0; i < core->num_services; i++)
+		q6core_add_service(&adev->dev, svcs_info[i].service_id,
+				   svcs_info[i].version);
+}
+
+static int q6core_get_svc_versions(struct q6core *core)
+{
+	struct apr_device *adev = core->adev;
+	struct apr_hdr hdr = {0};
+	int rc;
+
+	hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
+				      APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER);
+	hdr.pkt_size = APR_PKT_SIZE(APR_HDR_SIZE, 0);
+	hdr.opcode = AVCS_GET_VERSIONS;
+
+	rc = apr_send_pkt(adev, (uint32_t *)&hdr);
+	if (rc < 0)
+		return rc;
+
+	rc = wait_event_timeout(core->wait, (core->resp_received == 1),
+				msecs_to_jiffies(Q6_READY_TIMEOUT_MS));
+	if (rc > 0 && core->resp_received) {
+		core->resp_received = 0;
+		return 0;
+	}
+
+	return rc;
+}
+
+static bool q6core_is_adsp_ready(struct q6core *core)
+{
+	struct apr_device *adev = core->adev;
+	struct apr_hdr hdr = {0};
+	int rc;
+
+	hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
+				      APR_HDR_LEN(APR_HDR_SIZE), APR_PKT_VER);
+	hdr.pkt_size = APR_PKT_SIZE(APR_HDR_SIZE, 0);
+	hdr.opcode = AVCS_CMD_ADSP_EVENT_GET_STATE;
+
+	rc = apr_send_pkt(adev, (uint32_t *)&hdr);
+	if (rc < 0)
+		return false;
+
+	rc = wait_event_timeout(core->wait, (core->resp_received == 1),
+				msecs_to_jiffies(Q6_READY_TIMEOUT_MS));
+	if (rc > 0 && core->resp_received) {
+		core->resp_received = 0;
+		if (core->avcs_state == 0x1)
+			return true;
+	}
+
+	return false;
+}
+
+static int q6core_probe(struct apr_device *adev)
+{
+	struct q6core *core;
+	unsigned long  timeout = jiffies +
+				 msecs_to_jiffies(ADSP_STATE_READY_TIMEOUT_MS);
+	int ret = 0;
+
+	core = devm_kzalloc(&adev->dev, sizeof(*core), GFP_KERNEL);
+	if (!core)
+		return -ENOMEM;
+
+	dev_set_drvdata(&adev->dev, core);
+
+	core->adev = adev;
+	init_waitqueue_head(&core->wait);
+
+	do {
+		if (!q6core_is_adsp_ready(core)) {
+			dev_info(&adev->dev, "ADSP Audio isn't ready\n");
+		} else {
+			dev_info(&adev->dev, "ADSP Audio is ready\n");
+
+			ret = q6core_get_svc_versions(core);
+			if (!ret)
+				q6core_add_static_services(core);
+
+			break;
+		}
+	} while (time_after(timeout, jiffies));
+
+	return ret;
+}
+
+static int q6core_exit(struct apr_device *adev)
+{
+	return 0;
+}
+
+static const struct apr_device_id core_id[] = {
+	{"Q6CORE", APR_DOMAIN_ADSP, APR_SVC_ADSP_CORE, APR_CLIENT_AUDIO},
+	{ },
+};
+
+static struct apr_driver qcom_q6core_driver = {
+	.probe = q6core_probe,
+	.remove = q6core_exit,
+	.callback = core_callback,
+	.id_table = core_id,
+	.driver = {
+		   .name = "qcom-q6core",
+		   },
+};
+
+module_apr_driver(qcom_q6core_driver);
+
+MODULE_AUTHOR("Srinivas Kandagatla <srinivas.kandagatla@linaro.org");
+MODULE_DESCRIPTION("q6 core");
+MODULE_LICENSE("GPL v2");
-- 
2.15.0