raiden00pl commented on code in PR #8794: URL: https://github.com/apache/nuttx/pull/8794#discussion_r1133085347
########## drivers/wireless/bluetooth/bt_rpmsghci.c: ########## @@ -0,0 +1,535 @@ +/**************************************************************************** + * drivers/wireless/bluetooth/bt_rpmsghci.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 <stdio.h> + +#include <nuttx/kmalloc.h> +#include <nuttx/net/bluetooth.h> +#include <nuttx/semaphore.h> +#include <nuttx/rptun/openamp.h> + +#include "bt_rpmsghci.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +struct rpmsghci_s +{ + struct rpmsg_endpoint ept; + struct bt_driver_s btdev; + FAR const char *cpuname; + FAR const char *name; +}; + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +static int rpmsghci_default_handler(FAR struct rpmsg_endpoint *ept, + FAR void *data, size_t len, + uint32_t src, FAR void *priv); +static int rpmsghci_recv_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_default_handler, /* RPMSGHCI_OPEN */ + rpmsghci_default_handler, /* RPMSGHCI_CLOSE */ + rpmsghci_default_handler, /* RPMSGHCI_SEND */ + rpmsghci_default_handler, /* RPMSGHCI_IOCTL */ + rpmsghci_recv_handler, /* RPMSGHCI_RECV */ +}; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: rpmsghci_get_tx_payload_buffer + ****************************************************************************/ + +static FAR void * +rpmsghci_get_tx_payload_buffer(FAR struct rpmsghci_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_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: bt_rpmsghci_open + * + * Description: + * Rpmsg-HCI open operation + * + * Parameters: + * btdev - the bt instance + * + * Returned Values: + * OK on success; A negated errno value is returned on any failure. + * + ****************************************************************************/ + +static int bt_rpmsghci_open(struct bt_driver_s *btdev) +{ + FAR struct rpmsghci_s *priv = NULL; + FAR struct rpmsghci_open_s *msg = NULL; + uint32_t space = 0; + int ret = OK; + + /* Get RPMSG-HCI data */ + + DEBUGASSERT(btdev != NULL); + priv = btdev->rpmsg; + + /* Perform the rpmsg write */ + + msg = rpmsghci_get_tx_payload_buffer(priv, &space); + if (msg == NULL) + { + ret = -ENOMEM; + goto errout; + } + + ret = rpmsghci_send(priv, RPMSGHCI_OPEN, &msg->header, + sizeof(struct rpmsghci_open_s)); +errout: + return ret; +} + +/**************************************************************************** + * Name: bt_rpmsghci_close + * + * Description: + * Rpmsg-HCI close operation + * + * Parameters: + * btdev - the bt instance + * + * Returned Values: + * OK on success; A negated errno value is returned on any failure. + * + ****************************************************************************/ + +static void bt_rpmsghci_close(struct bt_driver_s *btdev) +{ + FAR struct rpmsghci_s *priv = NULL; + FAR struct rpmsghci_close_s *msg = NULL; + uint32_t space = 0; + + /* Get RPMSG-HCI data */ + + DEBUGASSERT(btdev != NULL); + priv = btdev->rpmsg; + + /* Perform the rpmsg write */ + + msg = rpmsghci_get_tx_payload_buffer(priv, &space); + if (msg == NULL) + { + return; + } + + rpmsghci_send(priv, RPMSGHCI_CLOSE, &msg->header, + sizeof(struct rpmsghci_close_s)); +} + +/**************************************************************************** + * Name: bt_rpmsghci_send + * + * Description: + * Rpmsg-HCI send operation + * + * Parameters: + * btdev - the bt instance + * type - bt command type + * data - bt command data + * len - bt command data length + * + * Returned Values: + * OK on success; A negated errno value is returned on any failure. + * + ****************************************************************************/ + +static int bt_rpmsghci_send(struct bt_driver_s *btdev, + enum bt_buf_type_e type, + void *data, size_t len) +{ + FAR struct rpmsghci_s *priv = NULL; + FAR struct rpmsghci_data_s *msg = NULL; + uint32_t space = 0; + int ret = OK; + + wlinfo("bt_rpmsghci_send %d\n", type); + + /* Get RPMSG-HCI data */ + + DEBUGASSERT(btdev != NULL); + priv = btdev->rpmsg; + + if (data == NULL) + { + ret = -EINVAL; + goto errout; + } + + /* Perform the rpmsg write */ + + msg = rpmsghci_get_tx_payload_buffer(priv, &space); + if (msg == NULL) + { + ret = -ENOMEM; + goto errout; + } + + DEBUGASSERT(sizeof(struct rpmsghci_data_s) - 1 + len <= space); + memcpy(msg->data, data, len); + msg->type = type; + ret = rpmsghci_send(priv, RPMSGHCI_SEND, &msg->header, + sizeof(struct rpmsghci_data_s) -1 + len); + +errout: + return ret; +} + +/**************************************************************************** + * Name: bt_rpmsghci_ioctl + * + * Description: + * Rpmsg-HCI ioctl operation + * + * Parameters: + * btdev - the bt instance + * cmd - the ioctl command + * arg - the ioctl arguments + * + * Returned Values: + * OK on success; A negated errno value is returned on any failure. + * + ****************************************************************************/ + +static int bt_rpmsghci_ioctl(FAR struct bt_driver_s *btdev, int cmd, + unsigned long arg) +{ + /* TODO */ + + return -ENOTTY; +} + +/**************************************************************************** + * Name: rpmsghci_default_handler + * + * Description: + * Default rpmsg-HCI response handler, this function will be called to + * process the return message of rpmsghci_open(), rpmsghci_close(), + * rpmsghci_send(), rpmsghci_ioctl(). + * + * 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_recv_handler + * + * Description: + * Rpmsg-HCI receive 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_recv_handler(FAR struct rpmsg_endpoint *ept, + FAR void *data, size_t len, + uint32_t src, FAR void *priv) +{ + FAR struct rpmsghci_s *client = NULL; + FAR struct rpmsghci_data_s *msg = data; + int ret = OK; + + DEBUGASSERT(priv); + client = priv; + + wlinfo("rpmsghci_recv_handler %d\n", msg->type); + + ret = bt_netdev_receive(&client->btdev, msg->type, msg->data, + len - sizeof(struct rpmsghci_data_s) + 1); + msg->header.result = ret; + + return rpmsg_send(ept, msg, len); +} + +/**************************************************************************** + * Name: bt_rpmsghci_client_ept_cb + * + * Description: + * Rpmsg HCI end point callback function, this function will be called + * when receive the remote 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 bt_rpmsghci_client_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: bt_rpmsghci_client_created + * + * Description: + * Rpmsg HCI create function, this function will be called by rptun to + * create a rpmsg-hci end point. + * + * Parameters: + * rdev - The rpmsg-hci end point + * priv_ - Rpmsg-hci handle + * + * Returned Values: + * None + * + ****************************************************************************/ + +static void bt_rpmsghci_client_created(FAR struct rpmsg_device *rdev, + FAR void *priv_) +{ + FAR struct rpmsghci_s *priv = priv_; + char eptname[RPMSG_NAME_SIZE]; + + if (strcmp(priv->cpuname, rpmsg_get_cpuname(rdev)) == 0) + { + snprintf(eptname, RPMSG_NAME_SIZE, "%s%s", RPMSGHCI_NAME_PREFIX, + priv->name); + priv->ept.priv = priv; + rpmsg_create_ept(&priv->ept, rdev, eptname, + RPMSG_ADDR_ANY, RPMSG_ADDR_ANY, + bt_rpmsghci_client_ept_cb, NULL); + } +} + +/**************************************************************************** + * Name: bt_rpmsghci_client_destroy + * + * Description: + * Rpmsg HCI destroy function, this function will be called by rptun to + * destroy rpmsg-HCI end point. + * + * Parameters: + * rdev - The rpmsg-HCI end point + * priv_ - Rpmsg-HCI handle + * + * Returned Values: + * None + * + ****************************************************************************/ + +static void bt_rpmsghci_client_destroy(FAR struct rpmsg_device *rdev, + FAR void *priv_) +{ + FAR struct rpmsghci_s *priv = priv_; + + if (!strcmp(priv->cpuname, rpmsg_get_cpuname(rdev))) + { + rpmsg_destroy_ept(&priv->ept); + } +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: rpmsghci_register + * + * Description: + * Rpmsg-HCI client initialize function, the client cpu should call + * this function in the board initialize process. + * + * Parameters: + * cpuname - the server cpu name + * name - the HCI device you want to access in the remote cpu + * + * Returned Values: + * A non-NULL handle is returned on success; + * A NULL is returned on any failure. + * + ****************************************************************************/ + +FAR struct bt_driver_s *rpmsghci_register(FAR const char *cpuname, + FAR const char *name) +{ + FAR struct rpmsghci_s *priv = NULL; + + /* Validate input */ + + if (!cpuname || !name) + { + goto errout; + } + + /* Create RPMSG-HCI driver */ + + priv = kmm_zalloc(sizeof(struct rpmsghci_s)); + if (!priv) + { + goto errout; + } + + /* Initialize BT driver */ + + priv->btdev.head_reserve = 0; + priv->btdev.open = bt_rpmsghci_open; + priv->btdev.close = bt_rpmsghci_close; + priv->btdev.send = bt_rpmsghci_send; + priv->btdev.ioctl = bt_rpmsghci_ioctl; + priv->btdev.rpmsg = priv; Review Comment: btdev.priv is used by the BTH4 driver, so this won't work if the user want register HCI controller as BTH4 -- This is an automated message from the Apache Git Service. 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