--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (c) 2011-2017, The Linux Foundation. All rights reserved.
+// Copyright (c) 2018, Linaro Limited
+
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/uaccess.h>
+#include <linux/wait.h>
+#include <linux/jiffies.h>
+#include <linux/sched.h>
+#include <linux/module.h>
+#include <linux/kref.h>
+#include <linux/of.h>
+#include <linux/of_platform.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/soc/qcom/apr.h>
+#include "q6dsp-errno.h"
+#include "q6core.h"
+#include "q6afe.h"
+
+/* AFE CMDs */
+#define AFE_PORT_CMD_DEVICE_START 0x000100E5
+#define AFE_PORT_CMD_DEVICE_STOP 0x000100E6
+#define AFE_PORT_CMD_SET_PARAM_V2 0x000100EF
+#define AFE_SVC_CMD_SET_PARAM 0x000100f3
+#define AFE_PORT_CMDRSP_GET_PARAM_V2 0x00010106
+#define AFE_PARAM_ID_HDMI_CONFIG 0x00010210
+#define AFE_MODULE_AUDIO_DEV_INTERFACE 0x0001020C
+
+/* Port IDs */
+#define AFE_API_VERSION_HDMI_CONFIG 0x1
+#define AFE_PORT_ID_MULTICHAN_HDMI_RX 0x100E
+#define TIMEOUT_MS 1000
+#define AFE_CMD_RESP_AVAIL 0
+#define AFE_CMD_RESP_NONE 1
+
+struct q6afe {
+ struct apr_device *apr;
+ struct device *dev;
+ struct q6core_svc_api_info ainfo;
+ struct mutex lock;
+ struct list_head port_list;
+ spinlock_t port_list_lock;
+ struct platform_device *pdev_dais;
+};
+
+struct afe_port_cmd_device_start {
+ u16 port_id;
+ u16 reserved;
+} __packed;
+
+struct afe_port_cmd_device_stop {
+ u16 port_id;
+ u16 reserved;
+/* Reserved for 32-bit alignment. This field must be set to 0.*/
+} __packed;
+
+struct afe_port_param_data_v2 {
+ u32 module_id;
+ u32 param_id;
+ u16 param_size;
+ u16 reserved;
+} __packed;
+
+struct afe_port_cmd_set_param_v2 {
+ u16 port_id;
+ u16 payload_size;
+ u32 payload_address_lsw;
+ u32 payload_address_msw;
+ u32 mem_map_handle;
+} __packed;
+
+struct afe_param_id_hdmi_multi_chan_audio_cfg {
+ u32 hdmi_cfg_minor_version;
+ u16 datatype;
+ u16 channel_allocation;
+ u32 sample_rate;
+ u16 bit_width;
+ u16 reserved;
+} __packed;
+
+union afe_port_config {
+ struct afe_param_id_hdmi_multi_chan_audio_cfg hdmi_multi_ch;
+} __packed;
+
+struct q6afe_port {
+ wait_queue_head_t wait;
+ union afe_port_config port_cfg;
+ struct aprv2_ibasic_rsp_result_t result;
+ int token;
+ int id;
+ int cfg_type;
+ struct q6afe *afe;
+ struct kref refcount;
+ struct list_head node;
+};
+
+struct afe_port_map {
+ int port_id;
+ int token;
+ int is_rx;
+ int is_dig_pcm;
+};
+
+/*
+ * Mapping between Virtual Port IDs to DSP AFE Port ID
+ * On B Family SoCs DSP Port IDs are consistent across multiple SoCs
+ * on A Family SoCs DSP port IDs are same as virtual Port IDs.
+ */
+
+static struct afe_port_map port_maps[AFE_PORT_MAX] = {
+ [HDMI_RX] = { AFE_PORT_ID_MULTICHAN_HDMI_RX, HDMI_RX, 1, 1},
+};
+
+static void q6afe_port_free(struct kref *ref)
+{
+ struct q6afe_port *port;
+ struct q6afe *afe;
+ unsigned long flags;
+
+ port = container_of(ref, struct q6afe_port, refcount);
+ afe = port->afe;
+ spin_lock_irqsave(&afe->port_list_lock, flags);
+ list_del(&port->node);
+ spin_unlock_irqrestore(&afe->port_list_lock, flags);
+ kfree(port);
+}
+
+static struct q6afe_port *q6afe_find_port(struct q6afe *afe, int token)
+{
+ struct q6afe_port *p = NULL;
+ struct q6afe_port *ret = NULL;
+ unsigned long flags;
+
+ spin_lock_irqsave(&afe->port_list_lock, flags);
+ list_for_each_entry(p, &afe->port_list, node)
+ if (p->token == token) {
+ ret = p;
+ kref_get(&p->refcount);
+ break;
+ }
+
+ spin_unlock_irqrestore(&afe->port_list_lock, flags);
+ return ret;
+}
+
+static int q6afe_callback(struct apr_device *adev, struct apr_resp_pkt *data)
+{
+ struct q6afe *afe = dev_get_drvdata(&adev->dev);
+ struct aprv2_ibasic_rsp_result_t *res;
+ struct apr_hdr *hdr = &data->hdr;
+ struct q6afe_port *port;
+
+ if (!data->payload_size)
+ return 0;
+
+ res = data->payload;
+ switch (hdr->opcode) {
+ case APR_BASIC_RSP_RESULT: {
+ if (res->status) {
+ dev_err(afe->dev, "cmd = 0x%x returned error = 0x%x\n",
+ res->opcode, res->status);
+ }
+ switch (res->opcode) {
+ case AFE_PORT_CMD_SET_PARAM_V2:
+ case AFE_PORT_CMD_DEVICE_STOP:
+ case AFE_PORT_CMD_DEVICE_START:
+ case AFE_SVC_CMD_SET_PARAM:
+ port = q6afe_find_port(afe, hdr->token);
+ if (port) {
+ port->result = *res;
+ wake_up(&port->wait);
+ kref_put(&port->refcount, q6afe_port_free);
+ }
+ break;
+ default:
+ dev_err(afe->dev, "Unknown cmd 0x%x\n", res->opcode);
+ break;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ return 0;
+}
+
+/**
+ * q6afe_get_port_id() - Get port id from a given port index
+ *
+ * @index: port index
+ *
+ * Return: Will be an negative on error or valid port_id on success
+ */
+int q6afe_get_port_id(int index)
+{
+ if (index < 0 || index > AFE_PORT_MAX)
+ return -EINVAL;
+
+ return port_maps[index].port_id;
+}
+EXPORT_SYMBOL_GPL(q6afe_get_port_id);
+
+static int afe_apr_send_pkt(struct q6afe *afe, struct apr_pkt *pkt,
+ struct q6afe_port *port)
+{
+ wait_queue_head_t *wait = &port->wait;
+ struct apr_hdr *hdr = &pkt->hdr;
+ int ret;
+
+ mutex_lock(&afe->lock);
+ port->result.opcode = 0;
+ port->result.status = 0;
+
+ ret = apr_send_pkt(afe->apr, pkt);
+ if (ret < 0) {
+ dev_err(afe->dev, "packet not transmitted (%d)\n", ret);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = wait_event_timeout(*wait, (port->result.opcode == hdr->opcode),
+ msecs_to_jiffies(TIMEOUT_MS));
+ if (!ret) {
+ ret = -ETIMEDOUT;
+ } else if (port->result.status > 0) {
+ dev_err(afe->dev, "DSP returned error[%x]\n",
+ port->result.status);
+ ret = -EINVAL;
+ } else {
+ ret = 0;
+ }
+
+err:
+ mutex_unlock(&afe->lock);
+
+ return ret;
+}
+
+static int q6afe_port_set_param_v2(struct q6afe_port *port, void *data,
+ int param_id, int module_id, int psize)
+{
+ struct afe_port_cmd_set_param_v2 *param;
+ struct afe_port_param_data_v2 *pdata;
+ struct q6afe *afe = port->afe;
+ struct apr_pkt *pkt;
+ u16 port_id = port->id;
+ int ret, pkt_size;
+ void *p, *pl;
+
+ pkt_size = APR_HDR_SIZE + sizeof(*param) + sizeof(*pdata) + psize;
+ p = kzalloc(pkt_size, GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ pkt = p;
+ param = p + APR_HDR_SIZE;
+ pdata = p + APR_HDR_SIZE + sizeof(*param);
+ pl = p + APR_HDR_SIZE + sizeof(*param) + sizeof(*pdata);
+ memcpy(pl, data, psize);
+
+ pkt->hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
+ APR_HDR_LEN(APR_HDR_SIZE),
+ APR_PKT_VER);
+ pkt->hdr.pkt_size = pkt_size;
+ pkt->hdr.src_port = 0;
+ pkt->hdr.dest_port = 0;
+ pkt->hdr.token = port->token;
+ pkt->hdr.opcode = AFE_PORT_CMD_SET_PARAM_V2;
+
+ param->port_id = port_id;
+ param->payload_size = sizeof(*pdata) + psize;
+ param->payload_address_lsw = 0x00;
+ param->payload_address_msw = 0x00;
+ param->mem_map_handle = 0x00;
+ pdata->module_id = module_id;
+ pdata->param_id = param_id;
+ pdata->param_size = psize;
+
+ ret = afe_apr_send_pkt(afe, pkt, port);
+ if (ret)
+ dev_err(afe->dev, "AFE enable for port 0x%x failed %d\n",
+ port_id, ret);
+
+ kfree(pkt);
+ return ret;
+}
+
+/**
+ * q6afe_port_stop() - Stop a afe port
+ *
+ * @port: Instance of port to stop
+ *
+ * Return: Will be an negative on packet size on success.
+ */
+int q6afe_port_stop(struct q6afe_port *port)
+{
+ struct afe_port_cmd_device_stop *stop;
+ struct q6afe *afe = port->afe;
+ struct apr_pkt *pkt;
+ int port_id = port->id;
+ int ret = 0;
+ int index, pkt_size;
+ void *p;
+
+ port_id = port->id;
+ index = port->token;
+ if (index < 0 || index > AFE_PORT_MAX) {
+ dev_err(afe->dev, "AFE port index[%d] invalid!\n", index);
+ return -EINVAL;
+ }
+
+ pkt_size = APR_HDR_SIZE + sizeof(*stop);
+ p = kzalloc(pkt_size, GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ pkt = p;
+ stop = p + APR_HDR_SIZE;
+
+ pkt->hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
+ APR_HDR_LEN(APR_HDR_SIZE),
+ APR_PKT_VER);
+ pkt->hdr.pkt_size = pkt_size;
+ pkt->hdr.src_port = 0;
+ pkt->hdr.dest_port = 0;
+ pkt->hdr.token = index;
+ pkt->hdr.opcode = AFE_PORT_CMD_DEVICE_STOP;
+ stop->port_id = port_id;
+ stop->reserved = 0;
+
+ ret = afe_apr_send_pkt(afe, pkt, port);
+ if (ret)
+ dev_err(afe->dev, "AFE close failed %d\n", ret);
+
+ kfree(pkt);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(q6afe_port_stop);
+
+/**
+ * q6afe_hdmi_port_prepare() - Prepare hdmi afe port.
+ *
+ * @port: Instance of afe port
+ * @cfg: HDMI configuration for the afe port
+ *
+ */
+void q6afe_hdmi_port_prepare(struct q6afe_port *port,
+ struct q6afe_hdmi_cfg *cfg)
+{
+ union afe_port_config *pcfg = &port->port_cfg;
+
+ pcfg->hdmi_multi_ch.hdmi_cfg_minor_version =
+ AFE_API_VERSION_HDMI_CONFIG;
+ pcfg->hdmi_multi_ch.datatype = cfg->datatype;
+ pcfg->hdmi_multi_ch.channel_allocation = cfg->channel_allocation;
+ pcfg->hdmi_multi_ch.sample_rate = cfg->sample_rate;
+ pcfg->hdmi_multi_ch.bit_width = cfg->bit_width;
+}
+EXPORT_SYMBOL_GPL(q6afe_hdmi_port_prepare);
+
+/**
+ * q6afe_port_start() - Start a afe port
+ *
+ * @port: Instance of port to start
+ *
+ * Return: Will be an negative on packet size on success.
+ */
+int q6afe_port_start(struct q6afe_port *port)
+{
+ struct afe_port_cmd_device_start *start;
+ struct q6afe *afe = port->afe;
+ int port_id = port->id;
+ int ret, param_id = port->cfg_type;
+ struct apr_pkt *pkt;
+ int pkt_size;
+ void *p;
+
+ ret = q6afe_port_set_param_v2(port, &port->port_cfg, param_id,
+ AFE_MODULE_AUDIO_DEV_INTERFACE,
+ sizeof(port->port_cfg));
+ if (ret) {
+ dev_err(afe->dev, "AFE enable for port 0x%x failed %d\n",
+ port_id, ret);
+ return ret;
+ }
+
+ pkt_size = APR_HDR_SIZE + sizeof(*start);
+ p = kzalloc(pkt_size, GFP_KERNEL);
+ if (!p)
+ return -ENOMEM;
+
+ pkt = p;
+ start = p + APR_HDR_SIZE;
+
+ pkt->hdr.hdr_field = APR_HDR_FIELD(APR_MSG_TYPE_SEQ_CMD,
+ APR_HDR_LEN(APR_HDR_SIZE),
+ APR_PKT_VER);
+ pkt->hdr.pkt_size = pkt_size;
+ pkt->hdr.src_port = 0;
+ pkt->hdr.dest_port = 0;
+ pkt->hdr.token = port->token;
+ pkt->hdr.opcode = AFE_PORT_CMD_DEVICE_START;
+
+ start->port_id = port_id;
+
+ ret = afe_apr_send_pkt(afe, pkt, port);
+ if (ret)
+ dev_err(afe->dev, "AFE enable for port 0x%x failed %d\n",
+ port_id, ret);
+
+ kfree(pkt);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(q6afe_port_start);
+
+/**
+ * q6afe_port_get_from_id() - Get port instance from a port id
+ *
+ * @dev: Pointer to afe child device.
+ * @id: port id
+ *
+ * Return: Will be an error pointer on error or a valid afe port
+ * on success.
+ */
+struct q6afe_port *q6afe_port_get_from_id(struct device *dev, int id)
+{
+ int port_id;
+ struct q6afe *afe = dev_get_drvdata(dev->parent);
+ struct q6afe_port *port;
+ unsigned long flags;
+ int cfg_type;
+
+ if (id < 0 || id > AFE_PORT_MAX) {
+ dev_err(dev, "AFE port token[%d] invalid!\n", id);
+ return ERR_PTR(-EINVAL);
+ }
+
+ /* if port is multiple times bind/unbind before callback finishes */
+ port = q6afe_find_port(afe, id);
+ if (port) {
+ dev_err(dev, "AFE Port already open\n");
+ return port;
+ }
+
+ port_id = port_maps[id].port_id;
+
+ switch (port_id) {
+ case AFE_PORT_ID_MULTICHAN_HDMI_RX:
+ cfg_type = AFE_PARAM_ID_HDMI_CONFIG;
+ break;
+ default:
+ dev_err(dev, "Invalid port id 0x%x\n", port_id);
+ return ERR_PTR(-EINVAL);
+ }
+
+ port = kzalloc(sizeof(*port), GFP_KERNEL);
+ if (!port)
+ return ERR_PTR(-ENOMEM);
+
+ init_waitqueue_head(&port->wait);
+
+ port->token = id;
+ port->id = port_id;
+ port->afe = afe;
+ port->cfg_type = cfg_type;
+ kref_init(&port->refcount);
+
+ spin_lock_irqsave(&afe->port_list_lock, flags);
+ list_add_tail(&port->node, &afe->port_list);
+ spin_unlock_irqrestore(&afe->port_list_lock, flags);
+
+ return port;
+
+}
+EXPORT_SYMBOL_GPL(q6afe_port_get_from_id);
+
+/**
+ * q6afe_port_put() - Release port reference
+ *
+ * @port: Instance of port to put
+ */
+void q6afe_port_put(struct q6afe_port *port)
+{
+ kref_put(&port->refcount, q6afe_port_free);
+}
+EXPORT_SYMBOL_GPL(q6afe_port_put);
+
+static int q6afe_probe(struct apr_device *adev)
+{
+ struct q6afe *afe;
+ struct device *dev = &adev->dev;
+ struct device_node *dais_np;
+
+ afe = devm_kzalloc(dev, sizeof(*afe), GFP_KERNEL);
+ if (!afe)
+ return -ENOMEM;
+
+ q6core_get_svc_api_info(adev->svc_id, &afe->ainfo);
+ afe->apr = adev;
+ mutex_init(&afe->lock);
+ afe->dev = dev;
+ INIT_LIST_HEAD(&afe->port_list);
+ spin_lock_init(&afe->port_list_lock);
+
+ dev_set_drvdata(dev, afe);
+
+ dais_np = of_get_child_by_name(dev->of_node, "dais");
+ if (dais_np) {
+ afe->pdev_dais = of_platform_device_create(dais_np,
+ "q6afe-dai", dev);
+ of_node_put(dais_np);
+ }
+
+ return 0;
+}
+
+static int q6afe_remove(struct apr_device *adev)
+{
+ struct q6afe *afe = dev_get_drvdata(&adev->dev);
+
+ if (afe->pdev_dais)
+ of_platform_device_destroy(&afe->pdev_dais->dev, NULL);
+
+ return 0;
+}
+
+static const struct of_device_id q6afe_device_id[] = {
+ { .compatible = "qcom,q6afe" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, q6afe_device_id);
+
+static struct apr_driver qcom_q6afe_driver = {
+ .probe = q6afe_probe,
+ .remove = q6afe_remove,
+ .callback = q6afe_callback,
+ .driver = {
+ .name = "qcom-q6afe",
+ .of_match_table = of_match_ptr(q6afe_device_id),
+
+ },
+};
+
+module_apr_driver(qcom_q6afe_driver);
+MODULE_DESCRIPTION("Q6 Audio Front End");
+MODULE_LICENSE("GPL v2");
projects / platform / kernel / linux-rpi.git / commitdiff