1520 lines
44 KiB
C
1520 lines
44 KiB
C
/****************************************************************************
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* drivers/usbhost/usbhost_bthci.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <nuttx/arch.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/irq.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/kthread.h>
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#include <nuttx/nuttx.h>
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#include <nuttx/semaphore.h>
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#include <nuttx/signal.h>
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#include <nuttx/wqueue.h>
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#include <nuttx/net/bluetooth.h>
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#include <nuttx/usb/usb.h>
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#include <nuttx/usb/usbhost.h>
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#include <nuttx/wireless/bluetooth/bt_core.h>
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#include <nuttx/wireless/bluetooth/bt_hci.h>
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#include <nuttx/wireless/bluetooth/bt_driver.h>
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/* Configuration ************************************************************/
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#ifndef CONFIG_SCHED_WORKQUEUE
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# warning "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)"
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#endif
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/* Driver support ***********************************************************/
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/* This format is used to construct the /dev/bthci[n] device driver path. It
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* defined here so that it will be used consistently in all places.
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*/
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#define DEV_FORMAT "/dev/bthci%c"
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#define DEV_NAMELEN 12
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/* Used in usbhci_cfgdesc() */
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#define USBHOST_IFFOUND 0x01
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#define USBHOST_BINFOUND 0x02
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#define USBHOST_BOUTFOUND 0x04
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#define USBHOST_IINFOUND 0x08
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#define USBHOST_ALLFOUND 0x0F
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#define USBHOST_MAX_CREFS 0x7fff
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/****************************************************************************
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* Private Types
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****************************************************************************/
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/* This structure contains the internal, private state of the USB host class
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* driver.
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*/
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struct usbhost_state_s
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{
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/* This is the externally visible portion of the state */
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struct usbhost_class_s usbclass;
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struct bt_driver_s btdev;
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/* The remainder of the fields are provide to the class driver */
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char devchar; /* Character identifying the /dev/bthci[n] device */
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volatile bool disconnected; /* TRUE: Device has been disconnected */
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uint8_t ifno; /* Interface number */
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mutex_t lock; /* Used to maintain mutual exclusive access */
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struct work_s work; /* For interacting with the worker thread */
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FAR uint8_t *tbuffer; /* The allocated transfer buffer */
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size_t tbuflen; /* Size of the allocated transfer buffer */
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usbhost_ep_t bulkin; /* Bulk IN endpoint */
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usbhost_ep_t bulkout; /* Bulk OUT endpoint */
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usbhost_ep_t intin; /* Interrupt endpoint */
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FAR uint8_t *ctrlreq; /* Allocated ctrl request structure */
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FAR uint8_t *evbuffer; /* Allocated event buffer */
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size_t evbuflen; /* Size of the allocated event buffer */
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struct work_s acwork; /* For asynchronous event work */
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struct work_s evwork; /* For asynchronous event work */
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int16_t acbytes; /* The number of bytes actually transferred */
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int16_t evbytes; /* The number of bytes actually transferred */
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};
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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/* Memory allocation services */
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static inline FAR struct usbhost_state_s *usbhost_allocclass(void);
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static inline void usbhost_freeclass(FAR struct usbhost_state_s *usbclass);
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/* Device name management */
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static int usbhost_allocdevno(FAR struct usbhost_state_s *priv);
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static void usbhost_freedevno(FAR struct usbhost_state_s *priv);
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static inline void usbhost_mkdevname(FAR struct usbhost_state_s *priv,
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FAR char *devname);
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/* Worker thread actions */
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static void usbhost_destroy(FAR void *arg);
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/* Helpers for usbhci_connect() */
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static inline int usbhci_cfgdesc(FAR struct usbhost_state_s *priv,
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FAR const uint8_t *configdesc,
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int desclen);
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static inline int usbhost_devinit(FAR struct usbhost_state_s *priv);
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/* (Little Endian) Data helpers */
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static inline uint16_t usbhost_getle16(const uint8_t *val);
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static inline void usbhost_putle16(uint8_t *dest, uint16_t val);
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/* Transfer descriptor memory management */
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static inline int usbhost_talloc(FAR struct usbhost_state_s *priv);
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static inline void usbhost_tfree(FAR struct usbhost_state_s *priv);
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/* struct usbhost_registry_s methods */
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static struct usbhost_class_s *
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usbhost_create(FAR struct usbhost_hubport_s *hport,
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FAR const struct usbhost_id_s *id);
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/* struct usbhost_class_s methods */
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static int usbhci_connect(FAR struct usbhost_class_s *usbclass,
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FAR const uint8_t *configdesc, int desclen);
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static int usbhost_disconnected(FAR struct usbhost_class_s *usbclass);
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/* Driver methods --
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* depend upon the type of NuttX driver interface exported
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*/
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static int usbhost_ctrl_cmd(FAR struct usbhost_state_s *priv,
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uint8_t type, uint8_t req, uint16_t value,
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uint16_t iface, uint8_t *payload, uint16_t len);
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static void usbhost_event_work(FAR void *arg);
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static void usbhost_event_callback(FAR void *arg, ssize_t nbytes);
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static void usbhost_acl_callback(FAR void *arg, ssize_t nbytes);
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static ssize_t usbhost_cmd_tx(FAR struct usbhost_state_s *priv,
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FAR const void *buffer, size_t buflen);
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static ssize_t usbhost_acl_tx(FAR struct usbhost_state_s *priv,
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FAR const void *buffer, size_t buflen);
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static int usbhost_bthci_send(FAR struct bt_driver_s *dev,
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enum bt_buf_type_e type,
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FAR void *data, size_t len);
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static int usbhost_bthci_open(FAR struct bt_driver_s *dev);
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static void usbhost_bthci_close(FAR struct bt_driver_s *dev);
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static int usbhost_bthci_ioctl(FAR struct bt_driver_s *dev,
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int cmd, unsigned long arg);
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/* This structure provides the registry entry ID information that will be
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* used to associate the USB class driver to a connected USB device.
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*/
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static const struct usbhost_id_s g_id[] =
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{
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{
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USB_CLASS_WIRELESS_CONTROLLER, /* base */
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0x01, /* subclass */
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0x01, /* proto */
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0, /* vid */
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0 /* pid */
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},
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};
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/* This is the USB host bthci class's registry entry */
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static struct usbhost_registry_s g_bthci =
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{
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NULL, /* flink */
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usbhost_create, /* create */
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1, /* nids */
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&g_id[0] /* id[] */
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};
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/* This is a bitmap that is used to allocate device names /dev/bthcia-z. */
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static uint32_t g_devinuse;
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Name: usbhost_allocclass
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*
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* Description:
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* This is really part of the logic that implements the create() method
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* of struct usbhost_registry_s. This function allocates memory for one
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* new class instance.
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*
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* Input Parameters:
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* None
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*
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* Returned Value:
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* On success, this function will return a non-NULL instance of struct
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* usbhost_class_s. NULL is returned on failure; this function will
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* will fail only if there are insufficient resources to create another
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* USB host class instance.
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*
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****************************************************************************/
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static inline FAR struct usbhost_state_s *usbhost_allocclass(void)
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{
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FAR struct usbhost_state_s *priv;
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DEBUGASSERT(!up_interrupt_context());
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priv = (FAR struct usbhost_state_s *)
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kmm_malloc(sizeof(struct usbhost_state_s));
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uinfo("Allocated: %p\n", priv);
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return priv;
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}
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/****************************************************************************
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* Name: usbhost_freeclass
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*
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* Description:
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* Free a class instance previously allocated by usbhost_allocclass().
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*
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* Input Parameters:
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* usbclass - A reference to the class instance to be freed.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static inline void usbhost_freeclass(FAR struct usbhost_state_s *usbclass)
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{
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DEBUGASSERT(usbclass != NULL);
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/* Free the class instance (perhaps calling sched_kmm_free() in case we are
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* executing from an interrupt handler.
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*/
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uinfo("Freeing: %p\n", usbclass);
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kmm_free(usbclass);
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}
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/****************************************************************************
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* Name: Device name management
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*
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* Description:
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* Some tiny functions to coordinate management of device names.
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*
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****************************************************************************/
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static int usbhost_allocdevno(FAR struct usbhost_state_s *priv)
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{
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irqstate_t flags;
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int devno;
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flags = enter_critical_section();
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for (devno = 0; devno < 26; devno++)
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{
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uint32_t bitno = 1 << devno;
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if ((g_devinuse & bitno) == 0)
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{
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g_devinuse |= bitno;
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priv->devchar = 'a' + devno;
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leave_critical_section(flags);
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return OK;
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}
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}
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leave_critical_section(flags);
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return -EMFILE;
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}
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static void usbhost_freedevno(FAR struct usbhost_state_s *priv)
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{
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if (priv->devchar >= 'a')
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{
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int devno = priv->devchar - 'a';
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if (devno >= 0 && devno < 26)
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{
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irqstate_t flags = enter_critical_section();
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g_devinuse &= ~(1 << devno);
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leave_critical_section(flags);
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}
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}
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}
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static inline void usbhost_mkdevname(FAR struct usbhost_state_s *priv,
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FAR char *devname)
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{
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snprintf(devname, DEV_NAMELEN, DEV_FORMAT, priv->devchar);
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}
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/****************************************************************************
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* Name: usbhost_destroy
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*
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* Description:
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* The USB device has been disconnected and the reference count on the USB
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* host class instance has gone to 1.. Time to destroy the USB host class
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* instance.
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*
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* Input Parameters:
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* arg - A reference to the class instance to be destroyed.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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static void usbhost_destroy(FAR void *arg)
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{
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FAR struct usbhost_state_s *priv = (FAR struct usbhost_state_s *)arg;
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FAR struct usbhost_hubport_s *hport;
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FAR struct usbhost_driver_s *drvr;
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DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
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hport = priv->usbclass.hport;
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DEBUGASSERT(hport->drvr);
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drvr = hport->drvr;
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/* Release the device name used by this connection */
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usbhost_freedevno(priv);
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/* Free the endpoints */
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if (priv->bulkin)
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{
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DRVR_EPFREE(hport->drvr, priv->bulkin);
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}
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if (priv->bulkout)
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{
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DRVR_EPFREE(hport->drvr, priv->bulkout);
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}
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/* Cancel any pending asynchronous I/O */
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if (priv->intin)
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{
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DRVR_EPFREE(hport->drvr, priv->intin);
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}
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/* Free any transfer buffers */
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usbhost_tfree(priv);
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/* Destroy the semaphores */
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nxmutex_destroy(&priv->lock);
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/* Disconnect the USB host device */
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DRVR_DISCONNECT(drvr, hport);
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/* Free the function address assigned to this device */
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usbhost_devaddr_destroy(hport, hport->funcaddr);
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hport->funcaddr = 0;
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/* And free the class instance. Hmmm.. this may execute on the worker
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* thread and the work structure is part of what is getting freed. That
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* should be okay because once the work contained is removed from the
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* queue, it should not longer be accessed by the worker thread.
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*/
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usbhost_freeclass(priv);
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}
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/****************************************************************************
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* Name: usbhci_cfgdesc
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*
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* Description:
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* This function implements the connect() method of struct
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* usbhost_class_s. This method is a callback into the class
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* implementation. It is used to provide the device's configuration
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* descriptor to the class so that the class may initialize properly
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*
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* Input Parameters:
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* priv - The USB host class instance.
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* configdesc - A pointer to a uint8_t buffer container the configuration
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* descriptor.
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* desclen - The length in bytes of the configuration descriptor.
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*
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* Returned Value:
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* On success, zero (OK) is returned. On a failure, a negated errno value
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* is returned indicating the nature of the failure
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*
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* Assumptions:
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* This function will *not* be called from an interrupt handler.
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*
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****************************************************************************/
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static inline int usbhci_cfgdesc(FAR struct usbhost_state_s *priv,
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FAR const uint8_t *configdesc, int desclen)
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{
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FAR struct usbhost_hubport_s *hport;
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FAR struct usb_cfgdesc_s *cfgdesc;
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FAR struct usb_desc_s *desc;
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FAR struct usbhost_epdesc_s bindesc;
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FAR struct usbhost_epdesc_s boutdesc;
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FAR struct usbhost_epdesc_s iindesc;
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int remaining;
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uint8_t found = 0;
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int ret;
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DEBUGASSERT(priv != NULL && priv->usbclass.hport &&
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configdesc != NULL && desclen >= sizeof(struct usb_cfgdesc_s));
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hport = priv->usbclass.hport;
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/* Verify that we were passed a configuration descriptor */
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cfgdesc = (FAR struct usb_cfgdesc_s *)configdesc;
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if (cfgdesc->type != USB_DESC_TYPE_CONFIG)
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{
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return -EINVAL;
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}
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/* Get the total length of the configuration descriptor (little endian).
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* It might be a good check to get the number of interfaces here too.
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*/
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remaining = (int)usbhost_getle16(cfgdesc->totallen);
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/* Skip to the next entry descriptor */
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configdesc += cfgdesc->len;
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remaining -= cfgdesc->len;
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/* Loop where there are more dscriptors to examine */
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while (remaining >= sizeof(struct usb_desc_s))
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{
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/* What is the next descriptor? */
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desc = (FAR struct usb_desc_s *)configdesc;
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switch (desc->type)
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{
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/* Interface descriptor. We really should get the number of endpoints
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* from this descriptor too.
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*/
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case USB_DESC_TYPE_INTERFACE:
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{
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FAR struct usb_ifdesc_s *ifdesc =
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(FAR struct usb_ifdesc_s *)configdesc;
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DEBUGASSERT(remaining >= USB_SIZEOF_IFDESC);
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/* Save the interface number and mark ONLY the interface found */
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if (ifdesc->ifno == 0)
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{
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priv->ifno = ifdesc->ifno;
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found |= USBHOST_IFFOUND;
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}
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}
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break;
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|
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/* Endpoint descriptor. Here, we expect two bulk endpoints, an IN
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* and an OUT.
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*/
|
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|
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case USB_DESC_TYPE_ENDPOINT:
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{
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FAR struct usb_epdesc_s *epdesc =
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(FAR struct usb_epdesc_s *)configdesc;
|
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|
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DEBUGASSERT(remaining >= USB_SIZEOF_EPDESC);
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|
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if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) ==
|
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USB_EP_ATTR_XFER_INT)
|
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{
|
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if (USB_ISEPIN(epdesc->addr))
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{
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iindesc.hport = hport;
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iindesc.addr = epdesc->addr &
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USB_EP_ADDR_NUMBER_MASK;
|
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iindesc.in = true;
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iindesc.xfrtype = USB_EP_ATTR_XFER_INT;
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iindesc.interval = epdesc->interval;
|
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iindesc.mxpacketsize =
|
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usbhost_getle16(epdesc->mxpacketsize);
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|
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if (iindesc.addr == 1)
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{
|
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found |= USBHOST_IINFOUND;
|
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}
|
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}
|
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}
|
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|
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/* Check for a bulk endpoint. */
|
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|
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if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) ==
|
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USB_EP_ATTR_XFER_BULK)
|
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{
|
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/* Yes.. it is a bulk endpoint. IN or OUT? */
|
|
|
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if (USB_ISEPOUT(epdesc->addr))
|
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{
|
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/* It is an OUT bulk endpoint. There should be only one
|
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* bulk OUT endpoint.
|
|
*/
|
|
|
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if ((found & USBHOST_BOUTFOUND) != 0)
|
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{
|
|
/* Oops.. more than one endpoint. We don't know
|
|
* what to do with this.
|
|
*/
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Save the bulk OUT endpoint information */
|
|
|
|
boutdesc.hport = hport;
|
|
boutdesc.addr = epdesc->addr &
|
|
USB_EP_ADDR_NUMBER_MASK;
|
|
boutdesc.in = false;
|
|
boutdesc.xfrtype = USB_EP_ATTR_XFER_BULK;
|
|
boutdesc.interval = epdesc->interval;
|
|
boutdesc.mxpacketsize =
|
|
usbhost_getle16(epdesc->mxpacketsize);
|
|
|
|
if (boutdesc.addr == 2)
|
|
{
|
|
found |= USBHOST_BOUTFOUND;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* It is an IN bulk endpoint. There should be only one
|
|
* bulk IN endpoint.
|
|
*/
|
|
|
|
if ((found & USBHOST_BINFOUND) != 0)
|
|
{
|
|
/* Oops.. more than one endpoint. We don't know
|
|
* what to do with this.
|
|
*/
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Save the bulk IN endpoint information */
|
|
|
|
bindesc.hport = hport;
|
|
bindesc.addr = epdesc->addr &
|
|
USB_EP_ADDR_NUMBER_MASK;
|
|
bindesc.in = 1;
|
|
bindesc.xfrtype = USB_EP_ATTR_XFER_BULK;
|
|
bindesc.interval = epdesc->interval;
|
|
bindesc.mxpacketsize =
|
|
usbhost_getle16(epdesc->mxpacketsize);
|
|
|
|
if (bindesc.addr == 2)
|
|
{
|
|
found |= USBHOST_BINFOUND;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
/* Other descriptors are just ignored for now */
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* If we found everything we need with this interface, then break out
|
|
* of the loop early.
|
|
*/
|
|
|
|
if (found == USBHOST_ALLFOUND)
|
|
{
|
|
break;
|
|
}
|
|
|
|
/* Increment the address of the next descriptor */
|
|
|
|
configdesc += desc->len;
|
|
remaining -= desc->len;
|
|
}
|
|
|
|
/* Sanity checking... did we find all of things that we need? */
|
|
|
|
if (found != USBHOST_ALLFOUND)
|
|
{
|
|
uerr("ERROR: Found IF:%s IIN:%s BIN:%s BOUT:%s\n",
|
|
(found & USBHOST_IFFOUND) != 0 ? "YES" : "NO",
|
|
(found & USBHOST_IINFOUND) != 0 ? "YES" : "NO",
|
|
(found & USBHOST_BINFOUND) != 0 ? "YES" : "NO",
|
|
(found & USBHOST_BOUTFOUND) != 0 ? "YES" : "NO");
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* We are good... Allocate the endpoints */
|
|
|
|
ret = DRVR_EPALLOC(hport->drvr, &boutdesc, &priv->bulkout);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: Failed to allocate Bulk OUT endpoint\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = DRVR_EPALLOC(hport->drvr, &bindesc, &priv->bulkin);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: Failed to allocate Bulk IN endpoint\n");
|
|
DRVR_EPFREE(hport->drvr, priv->bulkout);
|
|
return ret;
|
|
}
|
|
|
|
ret = DRVR_EPALLOC(hport->drvr, &iindesc, &priv->intin);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: Failed to allocate Interrupt IN endpoint\n");
|
|
(void)DRVR_EPFREE(hport->drvr, priv->bulkout);
|
|
(void)DRVR_EPFREE(hport->drvr, priv->bulkin);
|
|
return ret;
|
|
}
|
|
|
|
uinfo("Endpoints allocated\n");
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_ctrl_cmd
|
|
*
|
|
* Description:
|
|
* Do a USB control transfer.
|
|
*
|
|
* Input Parameters:
|
|
* priv - A reference to the USB host class instance.
|
|
* type - Transfer flags.
|
|
* req - control transfer type.
|
|
* value - Value for control transfer.
|
|
* index - Index for control transfer.
|
|
* payload - Data buffer.
|
|
* len - Length of data buffer.
|
|
*
|
|
* Returned Value:
|
|
* 0 on success. Negated errno on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbhost_ctrl_cmd(FAR struct usbhost_state_s *priv,
|
|
uint8_t type, uint8_t req, uint16_t value,
|
|
uint16_t indx, uint8_t *payload, uint16_t len)
|
|
{
|
|
FAR struct usbhost_hubport_s *hport;
|
|
struct usb_ctrlreq_s *ctrlreq;
|
|
int ret;
|
|
|
|
hport = priv->usbclass.hport;
|
|
|
|
ctrlreq = (struct usb_ctrlreq_s *)priv->ctrlreq;
|
|
ctrlreq->type = type;
|
|
ctrlreq->req = req;
|
|
|
|
usbhost_putle16(ctrlreq->value, value);
|
|
usbhost_putle16(ctrlreq->index, indx);
|
|
usbhost_putle16(ctrlreq->len, len);
|
|
|
|
if (type & USB_REQ_DIR_IN)
|
|
{
|
|
ret = DRVR_CTRLIN(hport->drvr, hport->ep0, ctrlreq, payload);
|
|
}
|
|
else
|
|
{
|
|
ret = DRVR_CTRLOUT(hport->drvr, hport->ep0, ctrlreq, payload);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_event_callback
|
|
*
|
|
* Description:
|
|
* Handle event packet reception
|
|
*
|
|
* Input Parameters:
|
|
* arg - The argument provided when the asynchronous I/O was setup
|
|
* nbytes - The number of bytes actually transferred (or a negated errno
|
|
* value).
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbhost_event_callback(FAR void *arg, ssize_t nbytes)
|
|
{
|
|
FAR struct usbhost_state_s *priv;
|
|
|
|
priv = (FAR struct usbhost_state_s *)arg;
|
|
DEBUGASSERT(priv);
|
|
|
|
if (priv->intin)
|
|
{
|
|
priv->evbytes = (int16_t)nbytes;
|
|
|
|
if (priv->evbytes >= 0 && work_available(&priv->evwork))
|
|
{
|
|
work_queue(LPWORK, &priv->evwork,
|
|
usbhost_event_work,
|
|
priv, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_event_work
|
|
*
|
|
* Description:
|
|
* Receive bluetooth events.
|
|
*
|
|
* Input Parameters:
|
|
* arg - A reference to the USB host class instance.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbhost_event_work(FAR void *arg)
|
|
{
|
|
FAR struct usbhost_state_s *priv;
|
|
FAR struct usbhost_hubport_s *hport;
|
|
int ret;
|
|
|
|
priv = (FAR struct usbhost_state_s *)arg;
|
|
DEBUGASSERT(priv);
|
|
|
|
hport = priv->usbclass.hport;
|
|
DEBUGASSERT(hport);
|
|
|
|
if (priv->evbytes > 0)
|
|
{
|
|
bt_netdev_receive(&priv->btdev, BT_EVT, priv->evbuffer,
|
|
priv->evbytes);
|
|
priv->evbytes = 0;
|
|
}
|
|
|
|
if (priv->intin)
|
|
{
|
|
ret = DRVR_ASYNCH(hport->drvr, priv->intin,
|
|
(FAR uint8_t *)priv->evbuffer,
|
|
priv->evbuflen, usbhost_event_callback,
|
|
priv);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: DRVR_ASYNCH failed: %d\n", ret);
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_cmd_tx
|
|
*
|
|
* Description:
|
|
* Send a bluetooth HCI command.
|
|
*
|
|
* Input Parameters:
|
|
* priv - A reference to the USB host class instance.
|
|
* buffer - The buffer to be sent by the driver.
|
|
* len - The length of the buffer.
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t usbhost_cmd_tx(FAR struct usbhost_state_s *priv,
|
|
FAR const void *buffer, size_t buflen)
|
|
{
|
|
int ret;
|
|
|
|
nxmutex_lock(&priv->lock);
|
|
|
|
ret = usbhost_ctrl_cmd(priv,
|
|
USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS |
|
|
USB_REQ_RECIPIENT_DEVICE,
|
|
0, 0, 0, (uint8_t *)buffer, buflen);
|
|
|
|
nxmutex_unlock(&priv->lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_acl_work
|
|
*
|
|
* Description:
|
|
* Receive bluetooth ACL packets.
|
|
*
|
|
* Input Parameters:
|
|
* arg - A reference to the USB host class instance.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbhost_acl_work(FAR void *arg)
|
|
{
|
|
FAR struct usbhost_state_s *priv;
|
|
FAR struct usbhost_hubport_s *hport;
|
|
int ret;
|
|
|
|
priv = (FAR struct usbhost_state_s *)arg;
|
|
DEBUGASSERT(priv);
|
|
|
|
hport = priv->usbclass.hport;
|
|
DEBUGASSERT(hport);
|
|
|
|
if (priv->acbytes > 0)
|
|
{
|
|
bt_netdev_receive(&priv->btdev, BT_ACL_IN, priv->tbuffer,
|
|
priv->acbytes);
|
|
priv->acbytes = 0;
|
|
}
|
|
|
|
if (priv->bulkin)
|
|
{
|
|
ret = DRVR_ASYNCH(hport->drvr, priv->bulkin,
|
|
(FAR uint8_t *)priv->tbuffer,
|
|
priv->tbuflen, usbhost_acl_callback,
|
|
priv);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: DRVR_ASYNCH failed: %d\n", ret);
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_acl_callback
|
|
*
|
|
* Description:
|
|
* Handle ACL packet reception
|
|
*
|
|
* Input Parameters:
|
|
* arg - The argument provided when the asynchronous I/O was setup
|
|
* nbytes - The number of bytes actually transferred (or a negated errno
|
|
* value).
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbhost_acl_callback(FAR void *arg, ssize_t nbytes)
|
|
{
|
|
FAR struct usbhost_state_s *priv;
|
|
|
|
priv = (FAR struct usbhost_state_s *)arg;
|
|
DEBUGASSERT(priv);
|
|
|
|
if (priv->bulkin)
|
|
{
|
|
priv->acbytes = (int16_t)nbytes;
|
|
|
|
if (priv->acbytes >= 0 && work_available(&priv->acwork))
|
|
{
|
|
work_queue(LPWORK, &priv->acwork, usbhost_acl_work, priv, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_acl_tx
|
|
*
|
|
* Description:
|
|
* Send a bluetooth ACL packet.
|
|
*
|
|
* Input Parameters:
|
|
* priv - A reference to the USB host class instance.
|
|
* buffer - The buffer to be sent by the driver.
|
|
* len - The length of the buffer.
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static ssize_t usbhost_acl_tx(FAR struct usbhost_state_s *priv,
|
|
FAR const void *buffer, size_t buflen)
|
|
{
|
|
ssize_t nwritten = 0;
|
|
FAR struct usbhost_hubport_s *hport;
|
|
hport = priv->usbclass.hport;
|
|
DEBUGASSERT(hport);
|
|
|
|
nxmutex_lock(&priv->lock);
|
|
|
|
nwritten = DRVR_TRANSFER(hport->drvr, priv->bulkout,
|
|
(uint8_t *)buffer, buflen);
|
|
|
|
if (nwritten < 0)
|
|
{
|
|
uerr("ERROR: DRVR_TRANSFER for ACL failed: %d\n", (int)nwritten);
|
|
}
|
|
else
|
|
{
|
|
nwritten = OK;
|
|
}
|
|
|
|
nxmutex_unlock(&priv->lock);
|
|
|
|
return nwritten;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_bthci_send
|
|
*
|
|
* Description:
|
|
* Send the packet in the provided buffer.
|
|
*
|
|
* Input Parameters:
|
|
* btdev - An instance of the BT low-level driver's interface structure.
|
|
* type - The type of packet in the buffer.
|
|
* data - The buffer to be sent by the driver.
|
|
* len - The length of the buffer.
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbhost_bthci_send(FAR struct bt_driver_s *dev,
|
|
enum bt_buf_type_e type,
|
|
FAR void *data, size_t len)
|
|
{
|
|
int ret;
|
|
FAR struct usbhost_state_s *priv;
|
|
priv = container_of(dev, struct usbhost_state_s, btdev);
|
|
|
|
if (type == BT_CMD)
|
|
{
|
|
ret = usbhost_cmd_tx(priv, data, len);
|
|
}
|
|
else if (type == BT_ACL_OUT)
|
|
{
|
|
ret = usbhost_acl_tx(priv, data, len);
|
|
}
|
|
else
|
|
{
|
|
ret = -EINVAL;
|
|
uerr("ERROR: unexpected packet type %x\n", type);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_bthci_open
|
|
*
|
|
* Description:
|
|
* Initialize the bluetooth hardware.
|
|
*
|
|
* Input Parameters:
|
|
* dev - An instance of the BT low-level driver's interface structure.
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbhost_bthci_open(FAR struct bt_driver_s *dev)
|
|
{
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_bthci_close
|
|
*
|
|
* Description:
|
|
* Close the bluetooth hardware.
|
|
*
|
|
* Input Parameters:
|
|
* dev - An instance of the BT low-level driver's interface structure.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbhost_bthci_close(FAR struct bt_driver_s *dev)
|
|
{
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_bthci_ioctl
|
|
*
|
|
* Description:
|
|
* Handle IOCTL commands directed to this device.
|
|
*
|
|
* Input Parameters:
|
|
* dev - An instance of the BT low-level driver's interface structure.
|
|
* cmd - The IOCTL command
|
|
* arg - The argument for the IOCTL command
|
|
*
|
|
* Returned Value:
|
|
* Zero is returned on success; a negated errno value is returned on any
|
|
* failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbhost_bthci_ioctl(FAR struct bt_driver_s *dev,
|
|
int cmd, unsigned long arg)
|
|
{
|
|
return -ENOTTY;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_devinit
|
|
*
|
|
* Description:
|
|
* The USB device has been successfully connected. This completes the
|
|
* initialization operations. It is first called after the
|
|
* configuration descriptor has been received.
|
|
*
|
|
* This function is called from the connect() method. This function always
|
|
* executes on the thread of the caller of connect().
|
|
*
|
|
* Input Parameters:
|
|
* priv - A reference to the class instance.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int usbhost_devinit(FAR struct usbhost_state_s *priv)
|
|
{
|
|
int ret = OK;
|
|
|
|
if (priv->bulkin && work_available(&priv->acwork))
|
|
{
|
|
/* Begin monitoring of acl packets */
|
|
|
|
work_queue(LPWORK, &priv->acwork, usbhost_acl_work, priv, 0);
|
|
}
|
|
|
|
if (priv->intin && work_available(&priv->evwork))
|
|
{
|
|
/* Begin monitoring of message available events */
|
|
|
|
work_queue(LPWORK, &priv->evwork, usbhost_event_work, priv, 0);
|
|
}
|
|
|
|
if (ret >= 0 && priv->devchar == 'a')
|
|
{
|
|
/* Register the driver with the network stack. */
|
|
|
|
ret = bt_netdev_register(&priv->btdev);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: bt_netdev_register failed: %d\n", ret);
|
|
}
|
|
}
|
|
|
|
/* Check if we successfully initialized. */
|
|
|
|
if (ret >= 0)
|
|
{
|
|
/* Ready for normal operation */
|
|
|
|
uinfo("Successfully initialized\n");
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_getle16
|
|
*
|
|
* Description:
|
|
* Get a (possibly unaligned) 16-bit little endian value.
|
|
*
|
|
* Input Parameters:
|
|
* val - A pointer to the first byte of the little endian value.
|
|
*
|
|
* Returned Value:
|
|
* A uint16_t representing the whole 16-bit integer value
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline uint16_t usbhost_getle16(const uint8_t *val)
|
|
{
|
|
return (uint16_t)val[1] << 8 | (uint16_t)val[0];
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_putle16
|
|
*
|
|
* Description:
|
|
* Put a (possibly unaligned) 16-bit little endian value.
|
|
*
|
|
* Input Parameters:
|
|
* dest - A pointer to the first byte to save the little endian value.
|
|
* val - The 16-bit value to be saved.
|
|
*
|
|
* Returned Value:
|
|
* None
|
|
*
|
|
****************************************************************************/
|
|
|
|
static void usbhost_putle16(uint8_t *dest, uint16_t val)
|
|
{
|
|
/* Little endian means LSB first in byte stream */
|
|
|
|
dest[0] = val & 0xff;
|
|
dest[1] = val >> 8;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_talloc
|
|
*
|
|
* Description:
|
|
* Allocate transfer buffer memory.
|
|
*
|
|
* Input Parameters:
|
|
* priv - A reference to the class instance.
|
|
*
|
|
* Returned Value:
|
|
* On success, zero (OK) is returned. On failure, an negated errno value
|
|
* is returned to indicate the nature of the failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline int usbhost_talloc(FAR struct usbhost_state_s *priv)
|
|
{
|
|
FAR struct usbhost_hubport_s *hport;
|
|
size_t maxlen;
|
|
int ret;
|
|
|
|
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL &&
|
|
priv->tbuffer == NULL);
|
|
hport = priv->usbclass.hport;
|
|
|
|
/* Allocate buffer for events. */
|
|
|
|
if (priv->intin)
|
|
{
|
|
ret = DRVR_ALLOC(hport->drvr, &priv->evbuffer, &priv->evbuflen);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: DRVR_IOALLOC of evbuffer failed: %d\n", ret);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
/* Allocate memory for control requests */
|
|
|
|
ret = DRVR_ALLOC(hport->drvr, (FAR uint8_t **)&priv->ctrlreq, &maxlen);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: DRVR_ALLOC of ctrlreq failed: %d\n", ret);
|
|
|
|
usbhost_tfree(priv);
|
|
return ret;
|
|
}
|
|
|
|
DEBUGASSERT(maxlen >= sizeof(struct usb_ctrlreq_s));
|
|
|
|
ret = DRVR_ALLOC(hport->drvr, &priv->tbuffer, &priv->tbuflen);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: DRVR_ALLOC of buffer failed: %d\n", ret);
|
|
usbhost_tfree(priv);
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_tfree
|
|
*
|
|
* Description:
|
|
* Free transfer buffer memory.
|
|
*
|
|
* Input Parameters:
|
|
* priv - A reference to the class instance.
|
|
*
|
|
* Returned Value:
|
|
* On success, zero (OK) is returned. On failure, an negated errno value
|
|
* is returned to indicate the nature of the failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline void usbhost_tfree(FAR struct usbhost_state_s *priv)
|
|
{
|
|
FAR struct usbhost_hubport_s *hport;
|
|
|
|
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
|
|
hport = priv->usbclass.hport;
|
|
|
|
if (priv->evbuffer)
|
|
{
|
|
DRVR_FREE(hport->drvr, priv->evbuffer);
|
|
priv->evbuffer = NULL;
|
|
priv->evbuflen = 0;
|
|
}
|
|
|
|
if (priv->ctrlreq)
|
|
{
|
|
DRVR_FREE(hport->drvr, priv->ctrlreq);
|
|
priv->ctrlreq = NULL;
|
|
}
|
|
|
|
if (priv->tbuffer)
|
|
{
|
|
DRVR_FREE(hport->drvr, priv->tbuffer);
|
|
priv->tbuffer = NULL;
|
|
priv->tbuflen = 0;
|
|
}
|
|
}
|
|
|
|
/****************************************************************************
|
|
* struct usbhost_registry_s methods
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_create
|
|
*
|
|
* Description:
|
|
* This function implements the create() method of struct
|
|
* usbhost_registry_s. The create() method is a callback into the class
|
|
* implementation. It is used to (1) create a new instance of the USB
|
|
* host class state and to (2) bind a USB host driver "session" to the
|
|
* class instance. Use of this create() method will support environments
|
|
* where there may be multiple USB ports and multiple USB devices
|
|
* simultaneously connected.
|
|
*
|
|
* Input Parameters:
|
|
* hport - The hub port that manages the new class instance.
|
|
* id - In the case where the device supports multiple base classes,
|
|
* subclasses, or protocols, this specifies which to configure for.
|
|
*
|
|
* Returned Value:
|
|
* On success, this function will return a non-NULL instance of struct
|
|
* usbhost_class_s that can be used by the USB host driver to communicate
|
|
* with the USB host class. NULL is returned on failure; this function
|
|
* will fail only if the hport input parameter is NULL or if there are
|
|
* insufficient resources to create another USB host class instance.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static FAR struct usbhost_class_s *
|
|
usbhost_create(FAR struct usbhost_hubport_s *hport,
|
|
FAR const struct usbhost_id_s *id)
|
|
{
|
|
FAR struct usbhost_state_s *priv;
|
|
|
|
/* Allocate a USB host class instance */
|
|
|
|
priv = usbhost_allocclass();
|
|
if (priv == NULL)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize the allocated storage class instance */
|
|
|
|
memset(priv, 0, sizeof(struct usbhost_state_s));
|
|
|
|
/* Assign a device number to this class instance */
|
|
|
|
if (usbhost_allocdevno(priv) == OK)
|
|
{
|
|
/* Initialize class method function pointers */
|
|
|
|
priv->usbclass.hport = hport;
|
|
priv->usbclass.connect = usbhci_connect;
|
|
priv->usbclass.disconnected = usbhost_disconnected;
|
|
|
|
priv->btdev.open = usbhost_bthci_open;
|
|
priv->btdev.send = usbhost_bthci_send;
|
|
priv->btdev.close = usbhost_bthci_close;
|
|
priv->btdev.ioctl = usbhost_bthci_ioctl;
|
|
|
|
/* Initialize semaphores
|
|
* (this works okay in the interrupt context)
|
|
*/
|
|
|
|
nxmutex_init(&priv->lock);
|
|
|
|
/* Return the instance of the USB class driver */
|
|
|
|
return &priv->usbclass;
|
|
}
|
|
|
|
/* An error occurred. Free the allocation and return NULL on all failures */
|
|
|
|
usbhost_freeclass(priv);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* struct usbhost_class_s methods
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: usbhci_connect
|
|
*
|
|
* Description:
|
|
* This function implements the connect() method of struct
|
|
* usbhost_class_s. This method is a callback into the class
|
|
* implementation. It is used to provide the device's configuration
|
|
* descriptor to the class so that the class may initialize properly
|
|
*
|
|
* Input Parameters:
|
|
* usbclass - The USB host class entry previously obtained from a call to
|
|
* create().
|
|
* configdesc - A pointer to a uint8_t buffer container the configuration
|
|
* descriptor.
|
|
* desclen - The length in bytes of the configuration descriptor.
|
|
*
|
|
* Returned Value:
|
|
* On success, zero (OK) is returned. On a failure, a negated errno value
|
|
* is returned indicating the nature of the failure
|
|
*
|
|
* NOTE that the class instance remains valid upon return with a failure.
|
|
* It is the responsibility of the higher level enumeration logic to call
|
|
* CLASS_DISCONNECTED to free up the class driver resources.
|
|
*
|
|
* Assumptions:
|
|
* - This function will *not* be called from an interrupt handler.
|
|
* - If this function returns an error, the USB host controller driver
|
|
* must call to DISCONNECTED method to recover from the error
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbhci_connect(FAR struct usbhost_class_s *usbclass,
|
|
FAR const uint8_t *configdesc, int desclen)
|
|
{
|
|
FAR struct usbhost_state_s *priv = (FAR struct usbhost_state_s *)usbclass;
|
|
int ret;
|
|
|
|
DEBUGASSERT(priv != NULL &&
|
|
configdesc != NULL &&
|
|
desclen >= sizeof(struct usb_cfgdesc_s));
|
|
|
|
/* Parse the configuration descriptor to get the endpoints */
|
|
|
|
ret = usbhci_cfgdesc(priv, configdesc, desclen);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: usbhci_cfgdesc() failed: %d\n", ret);
|
|
}
|
|
else
|
|
{
|
|
ret = usbhost_talloc(priv);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: Failed to allocate transfer buffer\n");
|
|
return ret;
|
|
}
|
|
|
|
/* Now configure the device and register the NuttX driver */
|
|
|
|
ret = usbhost_devinit(priv);
|
|
if (ret < 0)
|
|
{
|
|
uerr("ERROR: usbhost_devinit() failed: %d\n", ret);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_disconnected
|
|
*
|
|
* Description:
|
|
* This function implements the disconnected() method of struct
|
|
* usbhost_class_s. This method is a callback into the class
|
|
* implementation. It is used to inform the class that the USB device has
|
|
* been disconnected.
|
|
*
|
|
* Input Parameters:
|
|
* usbclass - The USB host class entry previously obtained from a call to
|
|
* create().
|
|
*
|
|
* Returned Value:
|
|
* On success, zero (OK) is returned. On a failure, a negated errno value
|
|
* is returned indicating the nature of the failure
|
|
*
|
|
* Assumptions:
|
|
* This function may be called from an interrupt handler.
|
|
*
|
|
****************************************************************************/
|
|
|
|
static int usbhost_disconnected(struct usbhost_class_s *usbclass)
|
|
{
|
|
FAR struct usbhost_state_s *priv = (FAR struct usbhost_state_s *)usbclass;
|
|
irqstate_t flags;
|
|
|
|
DEBUGASSERT(priv != NULL);
|
|
|
|
/* Set an indication to any users of the device that the device is no
|
|
* longer available.
|
|
*/
|
|
|
|
flags = enter_critical_section();
|
|
|
|
priv->disconnected = true;
|
|
|
|
if (priv->devchar == 'a')
|
|
{
|
|
bt_netdev_unregister(&priv->btdev);
|
|
}
|
|
|
|
/* Cancel any ongoing transfers */
|
|
|
|
work_cancel(LPWORK, &priv->acwork);
|
|
work_cancel(LPWORK, &priv->evwork);
|
|
|
|
/* Destroy the class instance. If we are executing from an interrupt
|
|
* handler, then defer the destruction to the worker thread.
|
|
* Otherwise, destroy the instance now.
|
|
*/
|
|
|
|
if (up_interrupt_context())
|
|
{
|
|
/* Destroy the instance on the worker thread. */
|
|
|
|
DEBUGASSERT(priv->work.worker == NULL);
|
|
work_queue(LPWORK, &priv->work, usbhost_destroy, priv, 0);
|
|
}
|
|
else
|
|
{
|
|
/* Do the work now */
|
|
|
|
usbhost_destroy(priv);
|
|
}
|
|
|
|
leave_critical_section(flags);
|
|
return OK;
|
|
}
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: usbhost_bthci_initialize
|
|
*
|
|
* Description:
|
|
* Initialize the USB class driver. This function should be called
|
|
* be platform-specific code in order to initialize and register support
|
|
* for the USB host class device.
|
|
*
|
|
* Input Parameters:
|
|
* None
|
|
*
|
|
* Returned Value:
|
|
* On success this function will return zero (OK); A negated errno value
|
|
* will be returned on failure.
|
|
*
|
|
****************************************************************************/
|
|
|
|
int usbhost_bthci_initialize(void)
|
|
{
|
|
/* Advertise our availability to support (certain) devices */
|
|
|
|
return usbhost_registerclass(&g_bthci);
|
|
}
|