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nuttx/drivers/usbhost/usbhost_cdcmbim.c
Yanfeng Liu c3aab93e5f usb: document revision and typo fixing 
This slightly revised the USB host documentation and fixed typos
encountered in the document and some source files.

Signed-off-by: Yanfeng Liu <yfliu2008@qq.com>
2024-01-18 21:09:20 -08:00

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/****************************************************************************
* drivers/usbhost/usbhost_cdcmbim.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 <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <semaphore.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <poll.h>
#include <fcntl.h>
#include <arpa/inet.h>
#include <nuttx/arch.h>
#include <nuttx/irq.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/mutex.h>
#include <nuttx/fs/fs.h>
#include <nuttx/wqueue.h>
#include <nuttx/signal.h>
#include <nuttx/net/ip.h>
#include <nuttx/net/netdev.h>
#include <nuttx/usb/cdc.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbhost.h>
#define CDCMBIM_NETBUF_SIZE 8192
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* put in cdc.h */
#define USB_CDC_SEND_ENCAPSULATED_COMMAND 0x00
#define USB_CDC_GET_ENCAPSULATED_RESPONSE 0x01
#define USB_CDC_GET_NTB_PARAMETERS 0x80
#define USB_CDC_SET_NTB_INPUT_SIZE 0x86
#define USB_CDC_SET_NTB_FORMAT 0x83
#define USB_CDC_SET_CRC_MODE 0x8a
#define USB_CDC_SET_MAX_DATAGRAM_SIZE 0x88
#define USB_CDC_NCM_NTB16_SUPPORTED (1 << 0)
#define USB_CDC_NCM_NTB32_SUPPORTED (1 << 1)
#define USB_CDC_NCM_NTB16_FORMAT 0x00
#define USB_CDC_NCM_NTB32_FORMAT 0x01
#define USB_CDC_NCM_DATAGRAM_FORMAT_CRC 0x30
#define USB_CDC_NCM_DATAGRAM_FORMAT_NOCRC 0x31
#define USB_CDC_NCM_CRC_NOT_APPENDED 0x00
#define USB_CDC_NCM_CRC_APPENDED 0x01
#define USB_CDC_NCM_NTH16_SIGNATURE 0x484D434E
/* Configuration ************************************************************/
#ifndef CONFIG_SCHED_WORKQUEUE
# warning "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)"
#endif
#ifndef CONFIG_USBHOST_ASYNCH
# warning Asynchronous transfer support is required (CONFIG_USBHOST_ASYNCH)
#endif
#ifdef CONFIG_USBHOST_CDCMBIM_NTDELAY
# define USBHOST_CDCMBIM_NTDELAY MSEC2TICK(CONFIG_USBHOST_CDCMBIM_NTDELAY)
#else
# define USBHOST_CDCMBIM_NTDELAY MSEC2TICK(200)
#endif
#ifndef CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS
# define CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS 1
#endif
/* Driver support ***********************************************************/
/* This format is used to construct the /dev/cdc-wdm[n] device driver path.
* It defined here so that it will be used consistently in all places.
*/
#define DEV_FORMAT "/dev/cdc-wdm%d"
#define DEV_NAMELEN 16
/* Used in usbhost_cfgdesc() */
#define USBHOST_CTRLIFFOUND 0x01
#define USBHOST_DATAIFFOUND 0x02
#define USBHOST_INTRIFFOUND 0x04
#define USBHOST_BINFOUND 0x08
#define USBHOST_BOUTFOUND 0x10
#define USBHOST_ALLFOUND 0x1f
#define USBHOST_MAX_CREFS 0x7fff
/****************************************************************************
* Private Types
****************************************************************************/
struct usb_cdc_ncm_nth16_s
{
uint8_t signature[4];
uint8_t length[2];
uint8_t sequence[2];
uint8_t block_length[2];
uint8_t ndp_index[2];
};
struct usb_cdc_ncm_dpe16_s
{
uint8_t index[2];
uint8_t length[2];
};
struct usb_cdc_ncm_ndp16_s
{
uint8_t signature[4];
uint8_t length[2];
uint8_t next_ndp_index[2];
struct usb_cdc_ncm_dpe16_s dpe16[0];
};
struct usb_cdc_ncm_ntb_params_s
{
uint8_t length[2];
uint8_t ntb_formats_supported[2];
uint8_t ntb_in_max_size[4];
uint8_t ndp_in_divisor[2];
uint8_t ndp_in_payload_remainder[2];
uint8_t ndp_in_alignment[2];
uint8_t reserved[2];
uint8_t ntb_out_max_size[4];
uint8_t ndp_out_divisor[2];
uint8_t ndp_out_payload_remainder[2];
uint8_t ndp_out_alignment[2];
uint8_t ntb_out_max_datagrams[2];
};
struct usb_csifdesc_s
{
uint8_t len;
uint8_t type;
uint8_t subtype;
};
struct usb_mbim_desc_s
{
uint8_t len;
uint8_t type;
uint8_t subtype;
uint8_t mbim_version[2];
uint8_t max_ctrl_message[2];
uint8_t num_filters;
uint8_t max_filter_size;
uint8_t max_segment_size[2];
uint8_t network_capabilities;
};
/* This structure contains the internal, private state of the USB host class
* driver.
*/
struct usbhost_cdcmbim_s
{
/* This is the externally visible portion of the state */
struct usbhost_class_s usbclass;
/* The remainder of the fields are provided to the class driver */
uint8_t minor; /* Minor number identifying the /dev/cdc-wdm[n] device */
volatile bool disconnected; /* TRUE: Device has been disconnected */
uint16_t ctrlif; /* Control interface number */
uint16_t dataif; /* Data interface number */
int16_t crefs; /* Reference count on the driver instance */
mutex_t lock; /* Used to maintain mutual exclusive access */
struct work_s ntwork; /* Notification work */
struct work_s comm_rxwork; /* Communication interface RX work */
struct work_s bulk_rxwork;
struct work_s txpollwork;
struct work_s destroywork;
int16_t nnbytes; /* Number of bytes received in notification */
int16_t bulkinbytes;
uint16_t comm_rxlen; /* Number of bytes in the RX buffer */
uint16_t comm_rxmsgs; /* Number of messages available to be read */
uint16_t comm_rxpos; /* Read position for input buffer */
uint16_t maxctrlsize; /* Maximum size of a ctrl request */
uint16_t maxintsize; /* Maximum size of interrupt IN packet */
uint32_t maxntbin; /* Maximum size of NTB IN message */
uint32_t maxntbout; /* Maximum size of NTB OUT message */
FAR uint8_t *ctrlreq; /* Allocated ctrl request structure */
FAR uint8_t *data_txbuf; /* Allocated TX buffer for network datagrams */
FAR uint8_t *data_rxbuf; /* Allocated RX buffer for network datagrams */
FAR uint8_t *comm_rxbuf; /* Allocated RX buffer comm IN messages */
FAR uint8_t *notification; /* Allocated RX buffer for async notifications */
FAR uint8_t *rxnetbuf; /* Allocated RX buffer for NTB frames */
FAR uint8_t *txnetbuf; /* Allocated TX buffer for NTB frames */
usbhost_ep_t intin; /* Interrupt endpoint */
usbhost_ep_t bulkin; /* Bulk IN endpoint */
usbhost_ep_t bulkout; /* Bulk OUT endpoint */
uint16_t bulkmxpacket; /* Max packet size for Bulk OUT endpoint */
uint16_t ntbseq; /* NTB sequence number */
struct pollfd *fds[CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS];
/* Network device members */
bool bifup; /* true:ifup false:ifdown */
struct net_driver_s netdev; /* Interface understood by the network */
uint16_t txpktbuf[(MAX_NETDEV_PKTSIZE + 1) / 2];
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Memory allocation services */
static inline FAR struct usbhost_cdcmbim_s *usbhost_allocclass(void);
static inline void usbhost_freeclass(FAR struct usbhost_cdcmbim_s *usbclass);
/* Device name management */
static int usbhost_allocdevno(FAR struct usbhost_cdcmbim_s *priv);
static void usbhost_freedevno(FAR struct usbhost_cdcmbim_s *priv);
static inline void usbhost_mkdevname(FAR struct usbhost_cdcmbim_s *priv,
FAR char *devname);
/* Worker thread actions */
static void usbhost_notification_work(FAR void *arg);
static void usbhost_notification_callback(FAR void *arg, ssize_t nbytes);
static void usbhost_rxdata_work(FAR void *arg);
static void usbhost_bulkin_work(FAR void *arg);
static void usbhost_bulkin_callback(FAR void *arg, ssize_t nbytes);
static void usbhost_destroy(FAR void *arg);
/* Helpers for usbhost_connect() */
static int usbhost_cfgdesc(FAR struct usbhost_cdcmbim_s *priv,
FAR const uint8_t *configdesc, int desclen);
static inline int usbhost_devinit(FAR struct usbhost_cdcmbim_s *priv);
/* (Little Endian) Data helpers */
static inline uint16_t usbhost_getle16(const uint8_t *val);
static inline void usbhost_putle16(uint8_t *dest, uint16_t val);
static inline uint32_t usbhost_getle32(const uint8_t *val);
static void usbhost_putle32(uint8_t *dest, uint32_t val);
/* Buffer memory management */
static int usbhost_alloc_buffers(FAR struct usbhost_cdcmbim_s *priv);
static void usbhost_free_buffers(FAR struct usbhost_cdcmbim_s *priv);
/* struct usbhost_registry_s methods */
static struct usbhost_class_s
*usbhost_create(FAR struct usbhost_hubport_s *hport,
FAR const struct usbhost_id_s *id);
/* struct usbhost_class_s methods */
static int usbhost_connect(FAR struct usbhost_class_s *usbclass,
FAR const uint8_t *configdesc, int desclen);
static int usbhost_disconnected(FAR struct usbhost_class_s *usbclass);
/* Control interface driver methods */
static ssize_t cdcwdm_read(FAR struct file *filep, FAR char *buffer,
size_t buflen);
static ssize_t cdcwdm_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen);
static int cdcwdm_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
/* NuttX network callback functions */
static int cdcmbim_ifup(struct net_driver_s *dev);
static int cdcmbim_ifdown(struct net_driver_s *dev);
static int cdcmbim_txavail(struct net_driver_s *dev);
/* Network support functions */
static void cdcmbim_receive(struct usbhost_cdcmbim_s *priv, uint8_t *buf,
size_t len);
static int cdcmbim_txpoll(struct net_driver_s *dev);
/****************************************************************************
* Private Data
****************************************************************************/
/* This structure provides the registry entry ID information that will be
* used to associate the USB class driver to a connected USB device.
*/
static const struct usbhost_id_s g_id =
{
USB_CLASS_CDC, /* base */
CDC_SUBCLASS_MBIM, /* subclass */
0, /* proto */
0, /* vid */
0 /* pid */
};
/* This is the USB host storage class's registry entry */
static struct usbhost_registry_s g_cdcmbim =
{
NULL, /* flink */
usbhost_create, /* create */
1, /* nids */
&g_id /* id[] */
};
/* File operations for control channel */
static const struct file_operations g_cdcwdm_fops =
{
NULL, /* open */
NULL, /* close */
cdcwdm_read, /* read */
cdcwdm_write, /* write */
NULL, /* seek */
NULL, /* ioctl */
NULL, /* mmap */
NULL, /* truncate */
cdcwdm_poll /* poll */
};
/* This is a bitmap that is used to allocate device names /dev/cdc-wdm[n]. */
static uint32_t g_devinuse;
/****************************************************************************
* Private Functions
****************************************************************************/
static int usbhost_ctrl_cmd(FAR struct usbhost_cdcmbim_s *priv,
uint8_t type, uint8_t req, uint16_t value,
uint16_t iface, 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, iface);
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;
}
static ssize_t usbhost_readmessage(FAR struct usbhost_cdcmbim_s *priv,
FAR char *buffer, size_t buflen)
{
irqstate_t flags;
ssize_t ret = -EAGAIN;
flags = enter_critical_section();
if (priv->comm_rxlen > 0)
{
if (buflen > priv->comm_rxlen)
{
buflen = priv->comm_rxlen;
}
ret = buflen;
memcpy(buffer, priv->comm_rxbuf + priv->comm_rxpos, buflen);
priv->comm_rxlen -= buflen;
priv->comm_rxpos += buflen;
if (priv->comm_rxlen == 0)
{
priv->comm_rxpos = 0;
}
}
leave_critical_section(flags);
return ret;
}
static ssize_t cdcwdm_read(FAR struct file *filep, FAR char *buffer,
size_t buflen)
{
FAR struct inode *inode;
FAR struct usbhost_cdcmbim_s *priv;
ssize_t ret;
inode = filep->f_inode;
priv = inode->i_private;
nxmutex_lock(&priv->lock);
if (priv->disconnected)
{
ret = -ENODEV;
goto errout;
}
ret = usbhost_readmessage(priv, buffer, buflen);
if (ret < 0)
{
if (filep->f_oflags & O_NONBLOCK)
{
ret = -EAGAIN;
goto errout;
}
/* wait for a message
* TODO blocking read
*/
ret = 0;
goto errout;
}
/* If this message has been completely read and there are more
* messages available, read the next message into the input buffer.
*/
if (priv->comm_rxlen == 0 && priv->comm_rxmsgs > 0)
{
uinfo("Reading next message\n");
if (work_available(&priv->comm_rxwork))
{
work_queue(LPWORK, &priv->comm_rxwork,
(worker_t)usbhost_rxdata_work,
priv, 0);
}
}
errout:
nxmutex_unlock(&priv->lock);
return ret;
}
static ssize_t cdcwdm_write(FAR struct file *filep, FAR const char *buffer,
size_t buflen)
{
FAR struct inode *inode;
FAR struct usbhost_cdcmbim_s *priv;
int ret;
inode = filep->f_inode;
priv = inode->i_private;
if (priv->disconnected)
{
return -ENODEV;
}
if (buflen > priv->maxctrlsize)
{
buflen = priv->maxctrlsize;
}
/* Make sure that we have exclusive access to the private data
* structure. There may now be other tasks with the character driver
* open and actively trying to interact with the class driver.
*/
nxmutex_lock(&priv->lock);
ret = usbhost_ctrl_cmd(priv,
USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS |
USB_REQ_RECIPIENT_INTERFACE,
USB_CDC_SEND_ENCAPSULATED_COMMAND,
0, priv->ctrlif, (uint8_t *)buffer, buflen);
nxmutex_unlock(&priv->lock);
if (ret)
{
return ret;
}
uinfo("wrote %u bytes\n", buflen);
return buflen;
}
/****************************************************************************
* Name: usbhost_poll
*
* Description:
* Standard character driver poll method.
*
****************************************************************************/
static int cdcwdm_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup)
{
FAR struct inode *inode;
FAR struct usbhost_cdcmbim_s *priv;
int ret = OK;
int i;
DEBUGASSERT(fds);
inode = filep->f_inode;
priv = inode->i_private;
/* Make sure that we have exclusive access to the private data structure */
DEBUGASSERT(priv);
nxmutex_lock(&priv->lock);
if (priv->disconnected)
{
ret = -ENODEV;
}
else if (setup)
{
/* This is a request to set up the poll. Find an available slot for
* the poll structure reference
*/
for (i = 0; i < CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS; i++)
{
/* Find an available slot */
if (!priv->fds[i])
{
/* Bind the poll structure and this slot */
priv->fds[i] = fds;
fds->priv = &priv->fds[i];
break;
}
}
if (i >= CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS)
{
fds->priv = NULL;
ret = -EBUSY;
goto errout;
}
/* Should we immediately notify on any of the requested events? Notify
* the POLLIN event if there is a buffered message.
*/
if (priv->comm_rxlen > 0)
{
poll_notify(&fds, 1, POLLIN);
}
}
else
{
/* This is a request to tear down the poll. */
struct pollfd **slot = (struct pollfd **)fds->priv;
DEBUGASSERT(slot);
/* Remove all memory of the poll setup */
*slot = NULL;
fds->priv = NULL;
}
errout:
nxmutex_unlock(&priv->lock);
return ret;
}
/****************************************************************************
* Name: usbhost_allocclass
*
* Description:
* This is really part of the logic that implements the create() method
* of struct usbhost_registry_s. This function allocates memory for one
* new class instance.
*
* Input Parameters:
* None
*
* Returned Value:
* On success, this function will return a non-NULL instance of struct
* usbhost_class_s. NULL is returned on failure; this function will
* will fail only if there are insufficient resources to create another
* USB host class instance.
*
****************************************************************************/
static inline FAR struct usbhost_cdcmbim_s *usbhost_allocclass(void)
{
FAR struct usbhost_cdcmbim_s *priv;
DEBUGASSERT(!up_interrupt_context());
priv = kmm_malloc(sizeof(struct usbhost_cdcmbim_s));
uinfo("Allocated: %p\n", priv);
return priv;
}
/****************************************************************************
* Name: usbhost_freeclass
*
* Description:
* Free a class instance previously allocated by usbhost_allocclass().
*
* Input Parameters:
* usbclass - A reference to the class instance to be freed.
*
* Returned Value:
* None
*
****************************************************************************/
static inline void usbhost_freeclass(FAR struct usbhost_cdcmbim_s *usbclass)
{
DEBUGASSERT(usbclass != NULL);
/* Free the class instance (perhaps calling sched_kmm_free() in case we are
* executing from an interrupt handler.
*/
uinfo("Freeing: %p\n", usbclass);
kmm_free(usbclass);
}
/****************************************************************************
* Name: Device name management
*
* Description:
* Some tiny functions to coordinate management of device names.
*
****************************************************************************/
static int usbhost_allocdevno(FAR struct usbhost_cdcmbim_s *priv)
{
irqstate_t flags;
int devno;
flags = enter_critical_section();
for (devno = 0; devno < 32; devno++)
{
uint32_t bitno = 1 << devno;
if ((g_devinuse & bitno) == 0)
{
g_devinuse |= bitno;
priv->minor = devno;
leave_critical_section(flags);
return OK;
}
}
leave_critical_section(flags);
return -EMFILE;
}
static void usbhost_freedevno(FAR struct usbhost_cdcmbim_s *priv)
{
int devno = priv->minor;
if (devno >= 0 && devno < 26)
{
irqstate_t flags = enter_critical_section();
g_devinuse &= ~(1 << devno);
leave_critical_section(flags);
}
}
static inline void usbhost_mkdevname(FAR struct usbhost_cdcmbim_s *priv,
FAR char *devname)
{
snprintf(devname, DEV_NAMELEN, DEV_FORMAT, priv->minor);
}
static void usbhost_bulkin_callback(FAR void *arg, ssize_t nbytes)
{
struct usbhost_cdcmbim_s *priv = (struct usbhost_cdcmbim_s *)arg;
uint32_t delay = 0;
DEBUGASSERT(priv);
if (priv->disconnected)
{
return;
}
priv->bulkinbytes = (int16_t)nbytes;
if (nbytes < 0)
{
if (nbytes != -EAGAIN)
{
uerr("ERROR: Transfer failed: %d\n", nbytes);
}
delay = MSEC2TICK(30);
}
if (work_available(&priv->bulk_rxwork))
{
work_queue(LPWORK, &priv->bulk_rxwork,
usbhost_bulkin_work, priv, delay);
}
}
static void usbhost_bulkin_work(FAR void *arg)
{
struct usbhost_cdcmbim_s *priv;
struct usbhost_hubport_s *hport;
struct usb_cdc_ncm_nth16_s *nth;
uint16_t ndpoffset;
uint16_t dgram_len;
uint16_t dgram_off;
uint16_t block_len;
priv = (struct usbhost_cdcmbim_s *)arg;
DEBUGASSERT(priv);
hport = priv->usbclass.hport;
DEBUGASSERT(hport);
if (priv->disconnected || !priv->bifup)
{
return;
}
nxmutex_lock(&priv->lock);
if (priv->bulkinbytes < (int16_t)(sizeof(struct usb_cdc_ncm_nth16_s) +
sizeof(struct usb_cdc_ncm_ndp16_s)))
{
goto out;
}
/* Parse the NTB header */
nth = (struct usb_cdc_ncm_nth16_s *)priv->rxnetbuf;
if (usbhost_getle32(nth->signature) != USB_CDC_NCM_NTH16_SIGNATURE)
{
uerr("Invalid NTH signature\n");
goto out;
}
block_len = usbhost_getle16(nth->block_length);
if (block_len > priv->bulkinbytes)
{
uerr("Block length larger than rx buffer\n");
goto out;
}
ndpoffset = usbhost_getle16(nth->ndp_index);
if (ndpoffset > priv->bulkinbytes)
{
uerr("NDP offset too far %u > %u\n", ndpoffset, priv->bulkinbytes);
goto out;
}
/* Parse each NDP */
do
{
struct usb_cdc_ncm_dpe16_s *dpe;
struct usb_cdc_ncm_ndp16_s *ndp
= (struct usb_cdc_ncm_ndp16_s *)(priv->rxnetbuf + ndpoffset);
ndpoffset = usbhost_getle16(ndp->next_ndp_index);
/* Parse each DPE */
for (dpe = ndp->dpe16; usbhost_getle16(dpe->index); dpe++)
{
dgram_off = usbhost_getle16(dpe->index);
dgram_len = usbhost_getle16(dpe->length);
if (dgram_off + dgram_len <= priv->bulkinbytes)
{
cdcmbim_receive(priv, priv->rxnetbuf + dgram_off, dgram_len);
}
}
}
while (ndpoffset);
out:
DRVR_ASYNCH(hport->drvr, priv->bulkin,
(uint8_t *)priv->rxnetbuf, CDCMBIM_NETBUF_SIZE,
usbhost_bulkin_callback, priv);
nxmutex_unlock(&priv->lock);
}
/****************************************************************************
* Name: usbhost_rxdata_work
*
* Description:
* Read an available comm message into the RX buffer
*
* Input Parameters:
* arg - Driver private data
*
* Returned Value:
* None
*
* Assumptions:
* None
*
****************************************************************************/
static void usbhost_rxdata_work(FAR void *arg)
{
/* Would be nice if CTRLIN would return how many bytes it read... */
struct mbim_header_s
{
uint8_t type[4];
uint8_t len[4];
};
FAR struct usbhost_cdcmbim_s *priv;
struct mbim_header_s *hdr;
uint32_t len;
int ret;
priv = (FAR struct usbhost_cdcmbim_s *)arg;
DEBUGASSERT(priv);
/* Are we still connected? */
if (priv->disconnected)
{
return;
}
nxmutex_lock(&priv->lock);
ret = usbhost_ctrl_cmd(priv,
USB_REQ_DIR_IN | USB_REQ_TYPE_CLASS |
USB_REQ_RECIPIENT_INTERFACE,
USB_CDC_GET_ENCAPSULATED_RESPONSE,
0, priv->ctrlif, priv->comm_rxbuf,
priv->maxctrlsize);
if (ret)
{
uerr("Failed to read message: %d\n", ret);
goto errout;
}
hdr = (struct mbim_header_s *)priv->comm_rxbuf;
len = usbhost_getle32(hdr->len);
if (len > priv->maxctrlsize)
{
uerr("Read invalid MBIM packet\n");
goto errout;
}
uinfo("Read MBIM message %u bytes\n", len);
priv->comm_rxlen = len;
priv->comm_rxmsgs--;
/* Notify any poll waiters we have data */
poll_notify(priv->fds, CONFIG_USBHOST_CDCMBIM_NPOLLWAITERS, POLLIN);
errout:
nxmutex_unlock(&priv->lock);
}
/****************************************************************************
* Name: usbhost_notification_work
*
* Description:
* Handle receipt of an asynchronous notification from the CDC device
*
* Input Parameters:
* arg - The argument provided with the asynchronous I/O was setup
*
* Returned Value:
* None
*
* Assumptions:
* Probably called from an interrupt handler.
*
****************************************************************************/
static void usbhost_notification_work(FAR void *arg)
{
FAR struct usbhost_cdcmbim_s *priv;
FAR struct usbhost_hubport_s *hport;
FAR struct cdc_notification_s *inmsg;
int ret;
priv = (FAR struct usbhost_cdcmbim_s *)arg;
DEBUGASSERT(priv);
hport = priv->usbclass.hport;
DEBUGASSERT(hport);
/* Are we still connected? */
if (!priv->disconnected && priv->intin)
{
/* Yes.. Was an interrupt IN message received correctly? */
if (priv->nnbytes >= 0)
{
/* Yes.. decode the notification */
inmsg = (FAR struct cdc_notification_s *)priv->notification;
/* We care only about the ResponseAvailable notification */
if ((inmsg->type == (USB_REQ_DIR_IN | USB_REQ_TYPE_CLASS |
USB_REQ_RECIPIENT_INTERFACE)) &&
(inmsg->notification == ACM_RESPONSE_AVAILABLE))
{
priv->comm_rxmsgs++;
/* If this is the only message available, read it */
if (priv->comm_rxmsgs == 1)
{
if (work_available(&priv->comm_rxwork))
{
work_queue(LPWORK, &priv->comm_rxwork,
usbhost_rxdata_work,
priv, 0);
}
}
}
}
/* Setup to receive the next notification */
ret = DRVR_ASYNCH(hport->drvr, priv->intin,
(FAR uint8_t *)priv->notification,
SIZEOF_NOTIFICATION_S(0),
usbhost_notification_callback,
priv);
if (ret < 0)
{
uerr("ERROR: DRVR_ASYNCH failed: %d\n", ret);
}
}
}
/****************************************************************************
* Name: usbhost_notification_callback
*
* Description:
* Handle receipt of Response Available from the CDC/MBIM device
*
* Input Parameters:
* arg - The argument provided with the asynchronous I/O was setup
* nbytes - The number of bytes actually transferred (or a negated errno
* value;
*
* Returned Value:
* None
*
* Assumptions:
* Probably called from an interrupt handler.
*
****************************************************************************/
static void usbhost_notification_callback(FAR void *arg, ssize_t nbytes)
{
FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)arg;
uint32_t delay = 0;
DEBUGASSERT(priv);
/* Are we still connected? */
if (!priv->disconnected)
{
/* Check for a failure. On higher end host controllers, the
* asynchronous transfer will pend until data is available (OHCI and
* EHCI). On lower end host controllers (like STM32 and EFM32), the
* transfer will fail immediately when the device NAKs the first
* attempted interrupt IN transfer (with nbytes == -EAGAIN). In that
* case (or in the case of other errors), we must fall back to
* polling.
*/
DEBUGASSERT(nbytes >= INT16_MIN && nbytes <= INT16_MAX);
priv->nnbytes = (int16_t)nbytes;
if (nbytes < 0)
{
/* This debug output is good to know, but really a nuisance for
* those configurations where we have to fall back to polling.
* FIX: Don't output the message is the result is -EAGAIN.
*/
#if defined(CONFIG_DEBUG_USB) && !defined(CONFIG_DEBUG_INFO)
if (nbytes != -EAGAIN)
#endif
{
uerr("ERROR: Transfer failed: %d\n", nbytes);
}
/* We don't know the nature of the failure, but we need to do all
* that we can do to avoid a CPU hog error loop.
*
* Use the low-priority work queue and delay polling for the next
* event. We want to use as little CPU bandwidth as possible in
* this case.
*/
delay = USBHOST_CDCMBIM_NTDELAY;
}
/* Make sure that the work structure available. There is a remote
* chance that this may collide with a device disconnection event.
*/
if (work_available(&priv->ntwork))
{
work_queue(LPWORK, &priv->ntwork,
usbhost_notification_work,
priv, delay);
}
}
}
/****************************************************************************
* Name: usbhost_destroy
*
* Description:
* The USB device has been disconnected and the reference count on the USB
* host class instance has gone to 1.. Time to destroy the USB host class
* instance.
*
* Input Parameters:
* arg - A reference to the class instance to be destroyed.
*
* Returned Value:
* None
*
****************************************************************************/
static void usbhost_destroy(FAR void *arg)
{
FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)arg;
FAR struct usbhost_hubport_s *hport;
FAR struct usbhost_driver_s *drvr;
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
hport = priv->usbclass.hport;
DEBUGASSERT(hport->drvr);
drvr = hport->drvr;
uinfo("crefs: %d\n", priv->crefs);
/* Unregister the driver */
/* Release the device name used by this connection */
usbhost_freedevno(priv);
/* Free the endpoints */
if (priv->intin)
{
DRVR_EPFREE(hport->drvr, priv->intin);
}
if (priv->bulkin)
{
DRVR_EPFREE(hport->drvr, priv->bulkin);
}
if (priv->bulkout)
{
DRVR_EPFREE(hport->drvr, priv->bulkout);
}
/* Free any transfer buffers */
usbhost_free_buffers(priv);
/* Free the function address assigned to this device */
usbhost_devaddr_destroy(hport, hport->funcaddr);
hport->funcaddr = 0;
/* Destroy the semaphores */
/* Disconnect the USB host device */
DRVR_DISCONNECT(drvr, hport);
/* And free the class instance. Hmmm.. this may execute on the worker
* thread and the work structure is part of what is getting freed. That
* should be okay because once the work contained is removed from the
* queue, it should not longer be accessed by the worker thread.
*/
usbhost_freeclass(priv);
}
/****************************************************************************
* Name: usbhost_cfgdesc
*
* 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:
* priv - The USB host class instance.
* 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
*
* Assumptions:
* This function will *not* be called from an interrupt handler.
*
****************************************************************************/
static int usbhost_cfgdesc(FAR struct usbhost_cdcmbim_s *priv,
FAR const uint8_t *configdesc, int desclen)
{
FAR struct usbhost_hubport_s *hport;
FAR struct usb_cfgdesc_s *cfgdesc;
FAR struct usb_desc_s *desc;
FAR struct usbhost_epdesc_s bindesc;
FAR struct usbhost_epdesc_s boutdesc;
FAR struct usbhost_epdesc_s iindesc;
int remaining;
uint8_t found = 0;
int ret;
DEBUGASSERT(priv != NULL && priv->usbclass.hport &&
configdesc != NULL && desclen >= sizeof(struct usb_cfgdesc_s));
hport = priv->usbclass.hport;
/* Verify that we were passed a configuration descriptor */
cfgdesc = (FAR struct usb_cfgdesc_s *)configdesc;
if (cfgdesc->type != USB_DESC_TYPE_CONFIG)
{
return -EINVAL;
}
/* Get the total length of the configuration descriptor (little endian).
* It might be a good check to get the number of interfaces here too.
*/
remaining = (int)usbhost_getle16(cfgdesc->totallen);
/* Skip to the next entry descriptor */
configdesc += cfgdesc->len;
remaining -= cfgdesc->len;
/* Loop where there are more descriptors to examine */
while (remaining >= sizeof(struct usb_desc_s))
{
/* What is the next descriptor? */
desc = (FAR struct usb_desc_s *)configdesc;
switch (desc->type)
{
case USB_DESC_TYPE_CSINTERFACE:
{
FAR struct usb_csifdesc_s *csdesc = (FAR struct usb_csifdesc_s *)
desc;
/* MBIM functional descriptor */
if (csdesc->subtype == CDC_DSUBTYPE_MBIM)
{
FAR struct usb_mbim_desc_s *mbim =
(FAR struct usb_mbim_desc_s *)desc;
priv->maxctrlsize = usbhost_getle16(mbim->max_ctrl_message);
uinfo("MBIM max control size: %u\n", priv->maxctrlsize);
uinfo("MBIM max segment size: %u\n",
usbhost_getle16(mbim->max_segment_size));
}
}
break;
/* Interface descriptor. We really should get the number of endpoints
* from this descriptor too.
*/
case USB_DESC_TYPE_INTERFACE:
{
FAR struct usb_ifdesc_s *ifdesc = (FAR struct usb_ifdesc_s *)
configdesc;
uinfo("Interface descriptor\n");
DEBUGASSERT(remaining >= USB_SIZEOF_IFDESC);
/* Is this the control interface? */
if (ifdesc->classid == CDC_CLASS_COMM &&
ifdesc->subclass == CDC_SUBCLASS_MBIM &&
ifdesc->protocol == CDC_PROTO_NONE)
{
priv->ctrlif = ifdesc->ifno;
found |= USBHOST_CTRLIFFOUND;
}
/* Is this the data interface? */
else if (ifdesc->classid == USB_CLASS_CDC_DATA &&
ifdesc->subclass == CDC_SUBCLASS_NONE &&
ifdesc->protocol == CDC_DATA_PROTO_NTB)
{
priv->dataif = ifdesc->ifno;
found |= USBHOST_DATAIFFOUND;
}
}
break;
/* Endpoint descriptor. Here, we expect two bulk endpoints, an IN
* and an OUT.
*/
case USB_DESC_TYPE_ENDPOINT:
{
FAR struct usb_epdesc_s *epdesc = (FAR struct usb_epdesc_s *)
configdesc;
uinfo("Endpoint descriptor\n");
DEBUGASSERT(remaining >= USB_SIZEOF_EPDESC);
/* Check for interrupt endpoint */
if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) ==
USB_EP_ATTR_XFER_INT)
{
if (USB_ISEPIN(epdesc->addr))
{
found |= USBHOST_INTRIFFOUND;
iindesc.hport = hport;
iindesc.addr = epdesc->addr &
USB_EP_ADDR_NUMBER_MASK;
iindesc.in = true;
iindesc.xfrtype = USB_EP_ATTR_XFER_INT;
iindesc.interval = epdesc->interval;
iindesc.mxpacketsize =
usbhost_getle16(epdesc->mxpacketsize);
uinfo("Interrupt IN EP addr:%d mxpacketsize:%d\n",
iindesc.addr, iindesc.mxpacketsize);
priv->maxintsize = iindesc.mxpacketsize;
}
}
/* Check for a bulk endpoint. */
else if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) ==
USB_EP_ATTR_XFER_BULK)
{
/* Yes.. it is a bulk endpoint. IN or OUT? */
if (USB_ISEPOUT(epdesc->addr))
{
/* It is an OUT bulk endpoint. There should be only one
* bulk OUT endpoint.
*/
if ((found & USBHOST_BOUTFOUND) != 0)
{
/* Oops.. more than one endpoint. We don't know
* what to do with this.
*/
return -EINVAL;
}
found |= USBHOST_BOUTFOUND;
/* 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);
uinfo("Bulk OUT EP addr:%d mxpacketsize:%d\n",
boutdesc.addr, boutdesc.mxpacketsize);
priv->bulkmxpacket = boutdesc.mxpacketsize;
}
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;
}
found |= USBHOST_BINFOUND;
/* 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);
uinfo("Bulk IN EP addr:%d mxpacketsize:%d\n",
bindesc.addr, bindesc.mxpacketsize);
}
}
}
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 CTRLIF:%s DATAIF: %s BIN:%s BOUT:%s\n",
(found & USBHOST_CTRLIFFOUND) != 0 ? "YES" : "NO",
(found & USBHOST_DATAIFFOUND) != 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");
(void)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;
}
static int usbhost_setinterface(FAR struct usbhost_cdcmbim_s *priv,
uint16_t iface, uint16_t setting)
{
return usbhost_ctrl_cmd(priv,
USB_REQ_DIR_OUT | USB_REQ_RECIPIENT_INTERFACE,
USB_REQ_SETINTERFACE, setting, iface, NULL, 0);
}
static int cdc_ncm_set_ntb_input_size(FAR struct usbhost_cdcmbim_s *priv,
uint32_t size)
{
uint8_t buf[4];
usbhost_putle32(buf, size);
return usbhost_ctrl_cmd(priv,
USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS |
USB_REQ_RECIPIENT_INTERFACE,
USB_CDC_SET_NTB_INPUT_SIZE,
0, priv->ctrlif, buf, 4);
}
#if 0
static int cdc_ncm_set_max_dgram_size(FAR struct usbhost_cdcmbim_s *priv,
uint16_t size)
{
uint8_t buf[2];
usbhost_putle16(buf, size);
return usbhost_ctrl_cmd(priv,
USB_REQ_DIR_OUT | USB_REQ_TYPE_CLASS |
USB_REQ_RECIPIENT_INTERFACE,
USB_CDC_SET_MAX_DATAGRAM_SIZE,
0, priv->ctrlif, buf, 2);
}
#endif
static int cdc_ncm_read_parameters(FAR struct usbhost_cdcmbim_s *priv)
{
struct usb_cdc_ncm_ntb_params_s params;
int ret;
ret = usbhost_ctrl_cmd(priv,
USB_REQ_DIR_IN | USB_REQ_TYPE_CLASS |
USB_REQ_RECIPIENT_INTERFACE,
USB_CDC_GET_NTB_PARAMETERS,
0, priv->ctrlif, (uint8_t *)&params,
sizeof(params));
if (ret == OK)
{
priv->maxntbin = usbhost_getle32(params.ntb_in_max_size);
priv->maxntbout = usbhost_getle32(params.ntb_out_max_size);
}
return ret;
}
/****************************************************************************
* 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_cdcmbim_s *priv)
{
FAR struct usbhost_hubport_s *hport;
int ret = OK;
hport = priv->usbclass.hport;
/* Increment the reference count. This will prevent usbhost_destroy() from
* being called asynchronously if the device is removed.
*/
priv->crefs++;
DEBUGASSERT(priv->crefs == 2);
/* Configure the device */
/* Set aside transfer buffers for exclusive use by the class driver */
ret = usbhost_alloc_buffers(priv);
if (ret)
{
uerr("ERROR: failed to allocate buffers\n");
return ret;
}
priv->ntbseq = 0;
/* Read NCM parameters */
ret = cdc_ncm_read_parameters(priv);
if (ret)
{
uerr("ERROR: failed to read NCM parameters: %d\n", ret);
}
/* Set alternate setting 1 on data interface */
usbhost_setinterface(priv, priv->dataif, 1);
/* Set NTB Input size to length of rx buffer */
ret = cdc_ncm_set_ntb_input_size(priv, CDCMBIM_NETBUF_SIZE);
if (ret)
{
printf("set NTB input size failed: %d\n", ret);
}
#if 0
/* Set max datagram size to MTU */
ret = cdc_ncm_set_max_dgram_size(priv, 2048);
if (ret)
{
printf("Failed to set max dgram size: %d\n", ret);
}
#endif
/* Register the driver */
if (ret >= 0)
{
char devname[DEV_NAMELEN];
uinfo("Register character driver\n");
usbhost_mkdevname(priv, devname);
ret = register_driver(devname, &g_cdcwdm_fops, 0666, priv);
}
if (priv->intin)
{
/* Begin monitoring of message available events */
uinfo("Start notification monitoring\n");
ret = DRVR_ASYNCH(hport->drvr, priv->intin,
(FAR uint8_t *)priv->notification,
SIZEOF_NOTIFICATION_S(0),
usbhost_notification_callback,
priv);
if (ret < 0)
{
uerr("ERROR: DRVR_ASYNCH failed on intin: %d\n", ret);
}
}
/* Setup the network interface */
memset(&priv->netdev, 0, sizeof(struct net_driver_s));
priv->netdev.d_ifup = cdcmbim_ifup;
priv->netdev.d_ifdown = cdcmbim_ifdown;
priv->netdev.d_txavail = cdcmbim_txavail;
priv->netdev.d_private = priv;
/* Register the network device */
netdev_register(&priv->netdev, NET_LL_MBIM);
/* Check if we successfully initialized. We now have to be concerned
* about asynchronous modification of crefs because the character
* driver has been registered.
*/
if (ret >= 0)
{
nxmutex_lock(&priv->lock);
DEBUGASSERT(priv->crefs >= 2);
/* Handle a corner case where (1) open() has been called so the
* reference count is > 2, but the device has been disconnected.
* In this case, the class instance needs to persist until close()
* is called.
*/
if (priv->crefs <= 2 && priv->disconnected)
{
/* We don't have to give the semaphore because it will be
* destroyed when usb_destroy is called.
*/
ret = -ENODEV;
}
else
{
/* Ready for normal operation */
uinfo("Successfully initialized\n");
priv->crefs--;
nxmutex_unlock(&priv->lock);
}
}
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)
{
dest[0] = val & 0xff; /* Little endian means LS byte first in byte stream */
dest[1] = val >> 8;
}
/****************************************************************************
* Name: usbhost_getle32
*
* Description:
* Get a (possibly unaligned) 32-bit little endian value.
*
* Input Parameters:
* dest - A pointer to the first byte to save the big endian value.
* val - The 32-bit value to be saved.
*
* Returned Value:
* None
*
****************************************************************************/
static inline uint32_t usbhost_getle32(const uint8_t *val)
{
/* Little endian means LS halfword first in byte stream */
return (uint32_t)usbhost_getle16(&val[2]) << 16 |
(uint32_t)usbhost_getle16(val);
}
/****************************************************************************
* Name: usbhost_putle32
*
* Description:
* Put a (possibly unaligned) 32-bit little endian value.
*
* Input Parameters:
* dest - A pointer to the first byte to save the little endian value.
* val - The 32-bit value to be saved.
*
* Returned Value:
* None
*
****************************************************************************/
static void usbhost_putle32(uint8_t *dest, uint32_t val)
{
/* Little endian means LS halfword first in byte stream */
usbhost_putle16(dest, (uint16_t)(val & 0xffff));
usbhost_putle16(dest + 2, (uint16_t)(val >> 16));
}
/****************************************************************************
* Name: usbhost_alloc_buffers
*
* 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 int usbhost_alloc_buffers(FAR struct usbhost_cdcmbim_s *priv)
{
FAR struct usbhost_hubport_s *hport;
size_t maxlen;
int ret;
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL &&
priv->ctrlreq == NULL);
hport = priv->usbclass.hport;
/* 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);
goto errout;
}
DEBUGASSERT(maxlen >= sizeof(struct usb_ctrlreq_s));
/* Allocate buffer for receiving encapsulated data */
ret = DRVR_IOALLOC(hport->drvr, &priv->comm_rxbuf, priv->maxctrlsize);
if (ret < 0)
{
uerr("ERROR: DRVR_IOALLOC of comm_rxbuf failed: %d (%d bytes)\n", ret,
priv->maxctrlsize);
goto errout;
}
/* Allocate buffer for interrupt IN notifications */
ret = DRVR_IOALLOC(hport->drvr, &priv->notification, priv->maxintsize);
if (ret < 0)
{
uerr("ERROR: DRVR_IOALLOC of notification buf failed: %d (%d bytes)\n",
ret, priv->maxintsize);
goto errout;
}
ret = DRVR_IOALLOC(hport->drvr, &priv->rxnetbuf, CDCMBIM_NETBUF_SIZE);
if (ret < 0)
{
uerr("ERROR: DRVR_IOALLOC of net rx buf failed: %d (%d bytes)\n",
ret, 2048);
goto errout;
}
ret = DRVR_IOALLOC(hport->drvr, &priv->txnetbuf, 2048);
if (ret < 0)
{
uerr("ERROR: DRVR_IOALLOC of net tx buf failed: %d (%d bytes)\n",
ret, 2048);
goto errout;
}
return OK;
errout:
usbhost_free_buffers(priv);
return ret;
}
/****************************************************************************
* Name: usbhost_free_buffers
*
* Description:
* Free transfer buffer memory.
*
* Input Parameters:
* priv - A reference to the class instance.
*
* Returned Value:
* None
*
****************************************************************************/
static void usbhost_free_buffers(FAR struct usbhost_cdcmbim_s *priv)
{
FAR struct usbhost_hubport_s *hport;
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
hport = priv->usbclass.hport;
if (priv->ctrlreq)
{
(void)DRVR_FREE(hport->drvr, priv->ctrlreq);
}
if (priv->comm_rxbuf)
{
(void)DRVR_IOFREE(hport->drvr, priv->comm_rxbuf);
}
if (priv->notification)
{
(void)DRVR_IOFREE(hport->drvr, priv->notification);
}
if (priv->rxnetbuf)
{
(void)DRVR_IOFREE(hport->drvr, priv->rxnetbuf);
}
if (priv->txnetbuf)
{
(void)DRVR_IOFREE(hport->drvr, priv->txnetbuf);
}
priv->ctrlreq = NULL;
priv->comm_rxbuf = NULL;
priv->notification = NULL;
priv->rxnetbuf = NULL;
priv->txnetbuf = NULL;
}
/****************************************************************************
* 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 hat 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_cdcmbim_s *priv;
/* Allocate a USB host class instance */
priv = usbhost_allocclass();
if (priv)
{
/* Initialize the allocated storage class instance */
memset(priv, 0, sizeof(struct usbhost_cdcmbim_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 = usbhost_connect;
priv->usbclass.disconnected = usbhost_disconnected;
/* The initial reference count is 1... One reference is held by
* the driver.
*/
priv->crefs = 1;
/* Initialize mutex (this works 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 */
if (priv)
{
usbhost_freeclass(priv);
}
return NULL;
}
/****************************************************************************
* struct usbhost_class_s methods
****************************************************************************/
/****************************************************************************
* Name: usbhost_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 usbhost_connect(FAR struct usbhost_class_s *usbclass,
FAR const uint8_t *configdesc, int desclen)
{
FAR struct usbhost_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_s *)
usbclass;
int ret;
DEBUGASSERT(priv != NULL &&
configdesc != NULL &&
desclen >= sizeof(struct usb_cfgdesc_s));
/* Parse the configuration descriptor to get the endpoints */
ret = usbhost_cfgdesc(priv, configdesc, desclen);
if (ret < 0)
{
uerr("ERROR: usbhost_cfgdesc() failed: %d\n", ret);
}
else
{
/* 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_cdcmbim_s *priv = (FAR struct usbhost_cdcmbim_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;
/* Now check the number of references on the class instance. If it is one,
* then we can free the class instance now. Otherwise, we will have to
* wait until the holders of the references free them by closing the
* block driver.
*/
uinfo("crefs: %d\n", priv->crefs);
if (priv->crefs == 1)
{
/* 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. */
uinfo("Queuing destruction: worker %p->%p\n",
priv->destroywork.worker, usbhost_destroy);
DEBUGASSERT(priv->destroywork.worker == NULL);
work_queue(LPWORK, &priv->destroywork,
usbhost_destroy, priv, 0);
}
else
{
/* Do the work now */
usbhost_destroy(priv);
}
}
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Name: cdcmbim_transmit
*
* Description:
* Start hardware transmission. Called either from the txdone interrupt
* handling or from watchdog based polling.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int cdcmbim_transmit(struct usbhost_cdcmbim_s *priv)
{
struct usbhost_hubport_s *hport;
struct usb_cdc_ncm_nth16_s *nth;
struct usb_cdc_ncm_ndp16_s *ndp;
struct usb_cdc_ncm_dpe16_s *dpe;
ssize_t ret;
uint16_t len = 0;
hport = priv->usbclass.hport;
uinfo("transmit packet: %d bytes\n", priv->netdev.d_len);
/* Increment statistics */
NETDEV_TXPACKETS(&priv->netdev);
len = sizeof(struct usb_cdc_ncm_nth16_s);
nth = (struct usb_cdc_ncm_nth16_s *)priv->txnetbuf;
/* Begin filling NTH */
usbhost_putle32(nth->signature, USB_CDC_NCM_NTH16_SIGNATURE);
usbhost_putle16(nth->length, sizeof(struct usb_cdc_ncm_nth16_s));
usbhost_putle16(nth->sequence, priv->ntbseq++);
/* Payload directly after NTH */
memcpy(priv->txnetbuf + len, priv->netdev.d_buf, priv->netdev.d_len);
len += priv->netdev.d_len;
/* NDP after payload */
ndp = (struct usb_cdc_ncm_ndp16_s *)(priv->txnetbuf + len);
usbhost_putle16(ndp->next_ndp_index, 0);
usbhost_putle32(ndp->signature, 0x00535049);
usbhost_putle16(ndp->length, 16); /* NDP + (2 * DPE) */
/* Fill NDP and block info in NTH */
usbhost_putle16(nth->ndp_index, len);
len += 16;
usbhost_putle16(nth->block_length, len);
/* Fill first DPE */
dpe = ndp->dpe16;
usbhost_putle16(dpe->index, 0x0c);
usbhost_putle16(dpe->length, priv->netdev.d_len);
/* NULL DPE */
dpe++;
usbhost_putle16(dpe->index, 0);
usbhost_putle16(dpe->length, 0);
ret = DRVR_TRANSFER(hport->drvr, priv->bulkout, priv->txnetbuf, len);
if (ret < 0)
{
uerr("transfer returned error: %d\n", ret);
return ret;
}
/* If frame is multiple of wMaxPacketSize we must send a ZLP */
if ((len % priv->bulkmxpacket) == 0)
{
ret = DRVR_TRANSFER(hport->drvr, priv->bulkout,
priv->txnetbuf, 0);
if (ret < 0)
{
uerr("ERROR: DRVR_TRANSFER for ZLP failed: %d\n", (int)ret);
}
}
NETDEV_TXDONE(&priv->netdev);
return OK;
}
/****************************************************************************
* Name: cdcmbim_receive
*
* Description:
* Handle a received packet.
*
* Input Parameters:
* priv - Reference to the driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
****************************************************************************/
static void cdcmbim_receive(struct usbhost_cdcmbim_s *priv,
uint8_t *buf, size_t len)
{
uinfo("received packet: %d len\n", len);
net_lock();
NETDEV_RXPACKETS(&priv->netdev);
/* Any ACK or other response packet generated by the network stack
* will always be shorter than the received packet, therefore it is
* safe to pass the received frame buffer directly.
*/
priv->netdev.d_buf = buf;
priv->netdev.d_len = len;
switch (((FAR struct ipv4_hdr_s *)buf)->vhl & IP_VERSION_MASK)
{
#ifdef CONFIG_NET_IPv4
case IPv4_VERSION:
NETDEV_RXIPV4(&priv->netdev);
ipv4_input(&priv->netdev);
if (priv->netdev.d_len > 0)
{
cdcmbim_transmit(priv);
}
break;
#endif
#ifdef CONFIG_NET_IPv6
case IPv6_VERSION:
NETDEV_RXIPV6(&priv->netdev);
ipv6_input(&priv->netdev);
if (priv->dev.d_len > 0)
{
cdcmbim_transmit(priv);
}
break;
#endif
default:
NETDEV_RXERRORS(dev);
}
net_unlock();
}
/****************************************************************************
* Name: cdcmbim_txpoll
*
* Description:
* The transmitter is available, check if the network has any outgoing
* packets ready to send. This is a callback from devif_poll().
* devif_poll() may be called:
*
* 1. When the preceding TX packet send is complete,
* 2. When the preceding TX packet send timesout and the interface is reset
* 3. During normal TX polling
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* OK on success; a negated errno on failure
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int cdcmbim_txpoll(struct net_driver_s *dev)
{
struct usbhost_cdcmbim_s *priv = (struct usbhost_cdcmbim_s *)
dev->d_private;
/* If the polling resulted in data that should be sent out on the network,
* the field d_len is set to a value > 0.
*/
DEBUGASSERT(priv->netdev.d_buf == (FAR uint8_t *)priv->txpktbuf);
nxmutex_lock(&priv->lock);
/* Send the packet */
cdcmbim_transmit(priv);
nxmutex_unlock(&priv->lock);
return 0;
}
/****************************************************************************
* Name: cdcmbim_ifup
*
* Description:
* NuttX Callback: Bring up the MBIM interface when an IP address is
* provided
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static int cdcmbim_ifup(struct net_driver_s *dev)
{
struct usbhost_cdcmbim_s *priv = (struct usbhost_cdcmbim_s *)
dev->d_private;
struct usbhost_hubport_s *hport = priv->usbclass.hport;
int ret;
#ifdef CONFIG_NET_IPv4
ninfo("Bringing up: %u.%u.%u.%u\n",
ip4_addr1(dev->d_ipaddr), ip4_addr2(dev->d_ipaddr),
ip4_addr3(dev->d_ipaddr), ip4_addr4(dev->d_ipaddr));
#endif
#ifdef CONFIG_NET_IPv6
ninfo("Bringing up: %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x\n",
dev->d_ipv6addr[0], dev->d_ipv6addr[1], dev->d_ipv6addr[2],
dev->d_ipv6addr[3], dev->d_ipv6addr[4], dev->d_ipv6addr[5],
dev->d_ipv6addr[6], dev->d_ipv6addr[7]);
#endif
/* Start RX asynch on bulk in */
if (priv->bulkin)
{
ret = DRVR_ASYNCH(hport->drvr, priv->bulkin,
priv->rxnetbuf, CDCMBIM_NETBUF_SIZE,
usbhost_bulkin_callback, priv);
if (ret < 0)
{
uerr("ERROR: DRVR_ASYNCH failed on bulkin: %d\n", ret);
}
}
priv->bifup = true;
return OK;
}
/****************************************************************************
* Name: cdcmbim_ifdown
*
* Description:
* NuttX Callback: Stop the interface.
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static int cdcmbim_ifdown(struct net_driver_s *dev)
{
struct usbhost_cdcmbim_s *priv = (struct usbhost_cdcmbim_s *)
dev->d_private;
irqstate_t flags;
flags = enter_critical_section();
/* Mark the device "down" */
priv->bifup = false;
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Name: cdcmbim_txavail_work
*
* Description:
* Driver callback invoked when new TX data is available. This is a
* stimulus perform an out-of-cycle poll and, thereby, reduce the TX
* latency.
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Called in normal user mode
*
****************************************************************************/
static void cdcmbim_txavail_work(void *arg)
{
struct usbhost_cdcmbim_s *priv = (struct usbhost_cdcmbim_s *)arg;
net_lock();
priv->netdev.d_buf = (FAR uint8_t *)priv->txpktbuf;
if (priv->bifup)
{
devif_poll(&priv->netdev, cdcmbim_txpoll);
}
net_unlock();
}
/****************************************************************************
* Name: cdcmbim_txavail
*
* Description:
* Driver callback invoked when new TX data is available. This is a
* stimulus perform an out-of-cycle poll and, thereby, reduce the TX
* latency.
*
* Input Parameters:
* dev - Reference to the NuttX driver state structure
*
* Returned Value:
* None
*
* Assumptions:
* Called from the network stack with the network locked.
*
****************************************************************************/
static int cdcmbim_txavail(struct net_driver_s *dev)
{
struct usbhost_cdcmbim_s *priv = (struct usbhost_cdcmbim_s *)
dev->d_private;
if (work_available(&priv->txpollwork))
{
work_queue(LPWORK, &priv->txpollwork, cdcmbim_txavail_work, priv, 0);
}
return OK;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbhost_cdcmbim_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_cdcmbim_initialize(void)
{
/* Perform any one-time initialization of the class implementation */
/* Advertise our availability to support CDC MBIM devices */
return usbhost_registerclass(&g_cdcmbim);
}
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