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incubator-nuttx/drivers/wireless/bluetooth/bt_rpmsghci_server.c

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/****************************************************************************
* drivers/wireless/bluetooth/bt_rpmsghci_server.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you 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 <sys/param.h>
#include <assert.h>
#include <debug.h>
#include <stdlib.h>
#include <nuttx/rptun/openamp.h>
#include <nuttx/wireless/bluetooth/bt_rpmsghci.h>
#include "bt_rpmsghci.h"
/****************************************************************************
* Pre-processor definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct rpmsghci_server_s
{
struct rpmsg_endpoint ept;
FAR struct bt_driver_s *btdev;
FAR const char *name;
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int rpmsghci_open_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static int rpmsghci_close_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static int rpmsghci_send_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static int rpmsghci_ioctl_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
static int rpmsghci_default_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv);
/****************************************************************************
* Private Data
****************************************************************************/
static const rpmsg_ept_cb g_rpmsghci_handler[] =
{
rpmsghci_open_handler, /* RPMSGHCI_OPEN */
rpmsghci_close_handler, /* RPMSGHCI_CLOSE */
rpmsghci_send_handler, /* RPMSGHCI_SEND */
rpmsghci_ioctl_handler, /* RPMSGHCI_IOCTL */
rpmsghci_default_handler, /* RPMSGHCI_RECV */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: rpmsghci_get_tx_payload_buffer
****************************************************************************/
static FAR void *
rpmsghci_get_tx_payload_buffer(FAR struct rpmsghci_server_s *priv,
FAR uint32_t *len)
{
return rpmsg_get_tx_payload_buffer(&priv->ept, len, true);
}
/****************************************************************************
* Name: rpmsghci_send
*
* Description:
* Send the rpmsg data and wait for ACK.
*
* Parameters:
* priv - rpmsg device handle
* command - the command, RPMSGHCI_OPEN, RPMSGHCI_CLOSE, RPMSGHCI_SEND,
* RPMSGHCI_IOCTL
* msg - the message header
* len - length of the payload
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
static int rpmsghci_send(FAR struct rpmsghci_server_s *priv,
uint32_t command, FAR struct rpmsghci_header_s *msg,
int len)
{
struct rpmsghci_cookie_s cookie;
int ret = OK;
memset(&cookie, 0, sizeof(struct rpmsghci_cookie_s));
nxsem_init(&cookie.sem, 0, 0);
msg->command = command;
msg->result = -ENXIO;
msg->cookie = (uintptr_t)&cookie;
ret = rpmsg_send_nocopy(&priv->ept, msg, len);
if (ret < 0)
{
goto errout;
}
ret = rpmsg_wait(&priv->ept, &cookie.sem);
if (ret >= 0)
{
ret = msg->result;
}
errout:
nxsem_destroy(&cookie.sem);
return ret;
}
/****************************************************************************
* Name: rpmsghci_open_handler
*
* Description:
* Rpmsg-HCI device open handler.
*
* Parameters:
* ept - The rpmsg endpoint
* data - The return message
* len - The return message length
* src - unknow
* priv - unknow
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
static int rpmsghci_open_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct rpmsghci_server_s *server = NULL;
FAR struct bt_driver_s *btdev = NULL;
FAR struct rpmsghci_data_s *msg = data;
int ret = OK;
DEBUGASSERT(priv);
server = priv;
DEBUGASSERT(server->btdev);
btdev = server->btdev;
if (btdev->open)
{
ret = btdev->open(btdev);
}
msg->header.result = ret;
return rpmsg_send(ept, msg, sizeof(struct rpmsghci_header_s));
}
/****************************************************************************
* Name: rpmsghci_close_handler
*
* Description:
* Rpmsg-HCI close handler.
*
* Parameters:
* ept - The rpmsg endpoint
* data - The return message
* len - The return message length
* src - unknow
* priv - unknow
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
static int rpmsghci_close_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct rpmsghci_server_s *server = NULL;
FAR struct bt_driver_s *btdev = NULL;
FAR struct rpmsghci_data_s *msg = data;
int ret = OK;
DEBUGASSERT(priv);
server = priv;
DEBUGASSERT(server->btdev);
btdev = server->btdev;
if (btdev->close)
{
btdev->close(btdev);
}
msg->header.result = ret;
return rpmsg_send(ept, msg, sizeof(struct rpmsghci_header_s));
}
/****************************************************************************
* Name: rpmsghci_send_handler
*
* Description:
* Rpmsg-HCI send handler.
*
* Parameters:
* ept - The rpmsg endpoint
* data - The return message
* len - The return message length
* src - unknow
* priv - unknow
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
static int rpmsghci_send_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct rpmsghci_server_s *server = NULL;
FAR struct bt_driver_s *btdev = NULL;
FAR struct rpmsghci_data_s *msg = data;
int ret = OK;
DEBUGASSERT(priv);
server = priv;
DEBUGASSERT(server->btdev);
btdev = server->btdev;
wlinfo("rpmsghci_send_handler %d\n", msg->type);
ret = btdev->send(btdev, msg->type, msg->data,
len - sizeof(struct rpmsghci_data_s) + 1);
msg->header.result = ret;
return rpmsg_send(ept, msg, sizeof(struct rpmsghci_header_s));
}
/****************************************************************************
* Name: rpmsghci_ioctl_handler
*
* Description:
* Rpmsg-HCI ioctl handler.
*
* Parameters:
* ept - The rpmsg endpoint
* data - The return message
* len - The return message length
* src - unknow
* priv - unknow
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
static int rpmsghci_ioctl_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct rpmsghci_server_s *server = NULL;
FAR struct bt_driver_s *btdev = NULL;
FAR struct rpmsghci_ioctl_s *msg = data;
int ret = OK;
DEBUGASSERT(priv);
server = priv;
DEBUGASSERT(server->btdev);
btdev = server->btdev;
ret = btdev->ioctl(btdev, msg->request,
msg->arglen > 0 ? (unsigned long)msg->buf :
msg->arg);
msg->header.result = ret;
/* Send the entire frame so as not to lose ioctl returned data */
return rpmsg_send(ept, msg, len);
}
/****************************************************************************
* Name: rpmsghci_default_handler
*
* Description:
* Default rpmsg-HCI response handler, this function will be called to
* process the return message of rpmsghci_recv()
*
* Parameters:
* ept - The rpmsg endpoint
* data - The return message
* len - The return message length
* src - unknow
* priv - unknow
*
* Returned Values:
* Always OK
*
****************************************************************************/
static int rpmsghci_default_handler(FAR struct rpmsg_endpoint *ept,
FAR void *data, size_t len,
uint32_t src, FAR void *priv)
{
FAR struct rpmsghci_header_s *header = data;
FAR struct rpmsghci_cookie_s *cookie = NULL;
if (header->cookie != 0)
{
cookie = (FAR struct rpmsghci_cookie_s *)(uintptr_t)header->cookie;
return rpmsg_post(ept, &cookie->sem);
}
return 0;
}
/****************************************************************************
* Name: rpmsghci_ns_match
*
* Description:
* Check if we match to the rpmsg name service.
*
****************************************************************************/
static bool rpmsghci_ns_match(FAR struct rpmsg_device *rdev, FAR void *priv,
FAR const char *name, uint32_t dest)
{
return !strncmp(name, RPMSGHCI_NAME_PREFIX, RPMSGHCI_NAME_PREFIX_LEN);
}
/****************************************************************************
* Name: rpmsghci_ept_cb
*
* Description:
* Rpmsg HCI end point callback function, this function will be called
* when receive the client cpu message.
*
* Parameters:
* ept - The rpmsg-HCI end point
* data - The received data
* len - The received data length
* src - unknow
* priv - unknow
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
static int rpmsghci_ept_cb(FAR struct rpmsg_endpoint *ept, FAR void *data,
size_t len, uint32_t src, FAR void *priv)
{
FAR struct rpmsghci_header_s *header = data;
uint32_t command = header->command;
if (command < nitems(g_rpmsghci_handler))
{
return g_rpmsghci_handler[command](ept, data, len, src, priv);
}
return -EINVAL;
}
/****************************************************************************
* Name: rpmsghci_ns_unbind
*
* Description:
* Unbind from the rpmsg name service.
*
****************************************************************************/
static void rpmsghci_ns_unbind(FAR struct rpmsg_endpoint *ept)
{
rpmsg_destroy_ept(ept);
kmm_free(ept);
}
/****************************************************************************
* Name: rpmsghci_ns_bind
*
* Description:
* Bind to the rpmsg name service.
*
****************************************************************************/
static void rpmsghci_ns_bind(FAR struct rpmsg_device *rdev, FAR void *priv,
FAR const char *name, uint32_t dest)
{
FAR struct rpmsghci_server_s *server = priv;
server->ept.priv = priv;
rpmsg_create_ept(&server->ept, rdev, name,
RPMSG_ADDR_ANY, dest,
rpmsghci_ept_cb, rpmsghci_ns_unbind);
}
/****************************************************************************
* Name: rpmsghci_bt_receive
*
* Description:
* Called by the Bluetooth low-level driver when new data is received from
* the radio. Transfers data to the RPMSG client.
*
* This callback should not be called from the interrupt context !
*
* Returned Value:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
int rpmsghci_bt_receive(FAR struct bt_driver_s *btdev, uint8_t type,
FAR void *data, size_t len)
{
FAR struct rpmsghci_server_s *priv = NULL;
FAR struct rpmsghci_data_s *msg = NULL;
uint32_t space = 0;
wlinfo("rpmsghci_bt_receive %d\n", type);
/* Get RPMSG-HCI data */
DEBUGASSERT(btdev != NULL);
priv = btdev->priv;
if (data == NULL)
{
return -EINVAL;
}
/* Perform the rpmsg write */
msg = rpmsghci_get_tx_payload_buffer(priv, &space);
if (msg == NULL)
{
return -ENOMEM;
}
DEBUGASSERT(sizeof(struct rpmsghci_data_s) - 1 + len <= space);
memcpy(msg->data, data, len);
msg->type = type;
return rpmsghci_send(priv, RPMSGHCI_RECV, &msg->header,
sizeof(struct rpmsghci_data_s) -1 + len);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: rpmsghci_server_init
*
* Description:
* Rpmsg-HCI server initialize function, the server cpu should call
* this function.
*
* Parameters:
* name - RPMSG-HCI server name
* bt - BT device handler
*
* Returned Values:
* OK on success; A negated errno value is returned on any failure.
*
****************************************************************************/
int rpmshci_server_init(FAR const char *name, FAR struct bt_driver_s *btdev)
{
struct rpmsghci_server_s *priv = NULL;
int ret = OK;
/* Validate input */
if (!name || !btdev)
{
return -EINVAL;
}
/* Create RPMSG-HCI server */
priv = kmm_zalloc(sizeof(struct rpmsghci_server_s));
if (!priv)
{
return -ENOMEM;
}
/* Connect BT receive callback and RPMSG as priv */
btdev->receive = rpmsghci_bt_receive;
btdev->priv = priv;
/* Initialize RPMSG-HCI server data */
priv->name = name;
priv->btdev = btdev;
ret = rpmsg_register_callback(priv, NULL, NULL,
rpmsghci_ns_match,
rpmsghci_ns_bind);
if (ret < 0)
{
kmm_free(priv);
}
return ret;
}
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