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nuttx/drivers/usbhost/usbhost_xboxcontroller.c
Xiang Xiao bdeaea3742 Remove the unnessary empty line after label 
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
2022-09-30 17:54:56 +02:00

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/****************************************************************************
* drivers/usbhost/usbhost_xboxcontroller.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 <assert.h>
#include <errno.h>
#include <debug.h>
#include <fcntl.h>
#include <poll.h>
#include <nuttx/irq.h>
#include <nuttx/kmalloc.h>
#include <nuttx/kthread.h>
#include <nuttx/fs/fs.h>
#include <nuttx/arch.h>
#include <nuttx/wqueue.h>
#include <nuttx/signal.h>
#include <nuttx/semaphore.h>
#include <nuttx/usb/usb.h>
#include <nuttx/usb/usbhost.h>
#include <nuttx/input/xbox-controller.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_SCHED_WORKQUEUE
# warning "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)"
#endif
#ifndef CONFIG_XBOXCONTROLLER_DEFPRIO
# define CONFIG_XBOXCONTROLLER_DEFPRIO 50
#endif
#ifndef CONFIG_XBOXCONTROLLER_STACKSIZE
# define CONFIG_XBOXCONTROLLER_STACKSIZE 1024
#endif
#ifndef CONFIG_XBOXCONTROLLER_NPOLLWAITERS
# define CONFIG_XBOXCONTROLLER_NPOLLWAITERS 2
#endif
/* Driver support ***********************************************************/
/* This format is used to construct the /dev/xbox[n] device driver path. It
* defined here so that it will be used consistently in all places.
*/
#define DEV_FORMAT "/dev/xbox%c"
#define DEV_NAMELEN 11
/* Used in usbhost_cfgdesc() */
#define USBHOST_IFFOUND 0x01
#define USBHOST_EPINFOUND 0x02 /* Required interrupt IN EP descriptor found */
#define USBHOST_EPOUTFOUND 0x04 /* Required interrupt OUT EP descriptor found */
#define USBHOST_ALLFOUND 0x07
#define USBHOST_MAX_CREFS 0x7fff
/* Received message types */
#define USBHOST_WAITING_CONNECTION 0x02
#define USBHOST_GUIDE_BUTTON_STATUS 0x07
#define USBHOST_BUTTON_DATA 0x20
/* Button definitions */
#define XBOX_BUTTON_GUIDE_INDEX 4
#define XBOX_BUTTON_SYNC_INDEX 4
#define XBOX_BUTTON_SYNC_MASK (1 << 0)
#define XBOX_BUTTON_START_INDEX 4
#define XBOX_BUTTON_START_MASK (1 << 2)
#define XBOX_BUTTON_BACK_INDEX 4
#define XBOX_BUTTON_BACK_MASK (1 << 3)
#define XBOX_BUTTON_A_INDEX 4
#define XBOX_BUTTON_A_MASK (1 << 4)
#define XBOX_BUTTON_B_INDEX 4
#define XBOX_BUTTON_B_MASK (1 << 5)
#define XBOX_BUTTON_X_INDEX 4
#define XBOX_BUTTON_X_MASK (1 << 6)
#define XBOX_BUTTON_Y_INDEX 4
#define XBOX_BUTTON_Y_MASK (1 << 7)
#define XBOX_BUTTON_DPAD_UP_INDEX 5
#define XBOX_BUTTON_DPAD_UP_MASK (1 << 0)
#define XBOX_BUTTON_DPAD_DOWN_INDEX 5
#define XBOX_BUTTON_DPAD_DOWN_MASK (1 << 1)
#define XBOX_BUTTON_DPAD_LEFT_INDEX 5
#define XBOX_BUTTON_DPAD_LEFT_MASK (1 << 2)
#define XBOX_BUTTON_DPAD_RIGHT_INDEX 5
#define XBOX_BUTTON_DPAD_RIGHT_MASK (1 << 3)
#define XBOX_BUTTON_BUMPER_LEFT_INDEX 5
#define XBOX_BUTTON_BUMPER_LEFT_MASK (1 << 4)
#define XBOX_BUTTON_BUMPER_RIGHT_INDEX 5
#define XBOX_BUTTON_BUMPER_RIGHT_MASK (1 << 5)
#define XBOX_BUTTON_STICK_LEFT_INDEX 5
#define XBOX_BUTTON_STICK_LEFT_MASK (1 << 6)
#define XBOX_BUTTON_STICK_RIGHT_INDEX 5
#define XBOX_BUTTON_STICK_RIGHT_MASK (1 << 7)
#define XBOX_BUTTON_TRIGGER_LEFT 3
#define XBOX_BUTTON_TRIGGER_RIGHT 4
#define XBOX_BUTTON_STICK_LEFT_X 5
#define XBOX_BUTTON_STICK_LEFT_Y 6
#define XBOX_BUTTON_STICK_RIGHT_X 7
#define XBOX_BUTTON_STICK_RIGHT_Y 8
#define XBOX_BUTTON_SET(buffer, index, mask) \
((((buffer)[(index)] & (mask)) != 0) ? true : false);
/****************************************************************************
* Private Types
****************************************************************************/
/* This structure contains the internal, private state of the USB host class
* driver.
*/
struct usbhost_state_s
{
/* This is the externally visible portion of the state */
struct usbhost_class_s usbclass;
/* The remainder of the fields are provide to the class driver */
char devchar; /* Character identifying the /dev/xbox[n] device */
volatile bool disconnected; /* TRUE: Device has been disconnected */
volatile bool polling; /* TRUE: Poll thread is running */
volatile bool open; /* TRUE: The controller device is open */
volatile bool valid; /* TRUE: New sample data is available */
volatile bool initialized; /* TRUE: The initialization packet has been sent */
uint8_t ifno; /* Interface number */
uint8_t nwaiters; /* Number of threads waiting for controller data */
sem_t waitsem; /* Used to wait for controller data */
int16_t crefs; /* Reference count on the driver instance */
sem_t exclsem; /* Used to maintain mutual exclusive access */
struct work_s work; /* For interacting with the worker thread */
FAR uint8_t *tbuffer; /* The allocated transfer buffer */
FAR uint8_t obuffer[20]; /* The fixed output transfer buffer */
size_t tbuflen; /* Size of the allocated transfer buffer */
usbhost_ep_t epin; /* IN endpoint */
usbhost_ep_t epout; /* OUT endpoint */
pid_t pollpid; /* PID of the poll task */
size_t out_seq_num; /* The sequence number for outgoing packets */
struct xbox_controller_buttonstate_s rpt; /* The latest report out of the controller. */
/* The following is a list if poll structures of threads waiting for
* driver events. The 'struct pollfd' reference for each open is also
* retained in the f_priv field of the 'struct file'.
*/
struct pollfd *fds[CONFIG_XBOXCONTROLLER_NPOLLWAITERS];
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/* Semaphores */
static int usbhost_takesem(FAR sem_t *sem);
static void usbhost_forcetake(FAR sem_t *sem);
#define usbhost_givesem(s) nxsem_post(s);
/* Memory allocation services */
static inline FAR struct usbhost_state_s *usbhost_allocclass(void);
static inline void usbhost_freeclass(FAR struct usbhost_state_s *usbclass);
/* Device name management */
static int usbhost_allocdevno(FAR struct usbhost_state_s *priv);
static void usbhost_freedevno(FAR struct usbhost_state_s *priv);
static inline void usbhost_mkdevname(FAR struct usbhost_state_s *priv,
FAR char *devname);
/* Worker thread actions */
static void usbhost_destroy(FAR void *arg);
/* Polling support */
static void usbhost_pollnotify(FAR struct usbhost_state_s *dev);
static int usbhost_xboxcontroller_poll(int argc, char *argv[]);
/* Helpers for usbhost_connect() */
static inline int usbhost_cfgdesc(FAR struct usbhost_state_s *priv,
FAR const uint8_t *configdesc,
int desclen);
static inline int usbhost_devinit(FAR struct usbhost_state_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);
#if 0 /* Not used */
static void usbhost_putle32(uint8_t *dest, uint32_t val);
#endif
/* Transfer descriptor memory management */
static inline int usbhost_talloc(FAR struct usbhost_state_s *priv);
static inline int usbhost_tfree(FAR struct usbhost_state_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);
/* Driver methods. We export the controller as a standard character driver */
static int usbhost_open(FAR struct file *filep);
static int usbhost_close(FAR struct file *filep);
static ssize_t usbhost_read(FAR struct file *filep,
FAR char *buffer, size_t len);
static ssize_t usbhost_write(FAR struct file *filep,
FAR const char *buffer, size_t len);
static int usbhost_ioctl(FAR struct file *filep, int cmd, unsigned long arg);
static int usbhost_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup);
/****************************************************************************
* 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_xboxcontroller_id[] =
{
/* XBox One classic controller */
{
USB_CLASS_VENDOR_SPEC, /* base -- Must be one of the USB_CLASS_* definitions in usb.h */
0x0047, /* subclass -- depends on the device */
0x00d0, /* proto -- depends on the device */
0x045e, /* vid */
0x02dd /* pid */
},
/* XBox One S controller */
{
USB_CLASS_VENDOR_SPEC, /* base -- Must be one of the USB_CLASS_* definitions in usb.h */
0x0047, /* subclass -- depends on the device */
0x00d0, /* proto -- depends on the device */
0x045e, /* vid */
0x02ea /* pid */
}
};
/* This is the USB host storage class's registry entry */
static struct usbhost_registry_s g_xboxcontroller =
{
NULL, /* flink */
usbhost_create, /* create */
2, /* nids */
g_xboxcontroller_id /* id[] */
};
/* The configuration information for the block file device. */
static const struct file_operations g_xboxcontroller_fops =
{
usbhost_open, /* open */
usbhost_close, /* close */
usbhost_read, /* read */
usbhost_write, /* write */
NULL, /* seek */
usbhost_ioctl, /* ioctl */
usbhost_poll /* poll */
#ifndef CONFIG_DISABLE_PSEUDOFS_OPERATIONS
, NULL /* unlink */
#endif
};
/* This is a bitmap that is used to allocate device names /dev/xboxa-z. */
static uint32_t g_devinuse;
/* The following are used to managed the class creation operation */
static sem_t g_exclsem; /* For mutually exclusive thread creation */
static sem_t g_syncsem; /* Thread data passing interlock */
static struct usbhost_state_s *g_priv; /* Data passed to thread */
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: usbhost_takesem
*
* Description:
* This is just a wrapper to handle the annoying behavior of semaphore
* waits that return due to the receipt of a signal.
*
****************************************************************************/
static int usbhost_takesem(FAR sem_t *sem)
{
return nxsem_wait_uninterruptible(sem);
}
/****************************************************************************
* Name: usbhost_forcetake
*
* Description:
* This is just another wrapper but this one continues even if the thread
* is canceled. This must be done in certain conditions where were must
* continue in order to clean-up resources.
*
****************************************************************************/
static void usbhost_forcetake(FAR sem_t *sem)
{
int ret;
do
{
ret = nxsem_wait_uninterruptible(sem);
/* The only expected error would -ECANCELED meaning that the
* parent thread has been canceled. We have to continue and
* terminate the poll in this case.
*/
DEBUGASSERT(ret == OK || ret == -ECANCELED);
}
while (ret < 0);
}
/****************************************************************************
* 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_state_s *usbhost_allocclass(void)
{
FAR struct usbhost_state_s *priv;
DEBUGASSERT(!up_interrupt_context());
priv = (FAR struct usbhost_state_s *)
kmm_malloc(sizeof(struct usbhost_state_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_state_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_state_s *priv)
{
irqstate_t flags;
int devno;
flags = enter_critical_section();
for (devno = 0; devno < 26; devno++)
{
uint32_t bitno = 1 << devno;
if ((g_devinuse & bitno) == 0)
{
g_devinuse |= bitno;
priv->devchar = 'a' + devno;
leave_critical_section(flags);
return OK;
}
}
leave_critical_section(flags);
return -EMFILE;
}
static void usbhost_freedevno(FAR struct usbhost_state_s *priv)
{
int devno = 'a' - priv->devchar;
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_state_s *priv,
FAR char *devname)
{
snprintf(devname, DEV_NAMELEN, DEV_FORMAT, priv->devchar);
}
/****************************************************************************
* 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_state_s *priv = (FAR struct usbhost_state_s *)arg;
FAR struct usbhost_hubport_s *hport;
char devname[DEV_NAMELEN];
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
uinfo("crefs: %d\n", priv->crefs);
hport = priv->usbclass.hport;
DEBUGASSERT(hport->drvr);
uinfo("crefs: %d\n", priv->crefs);
/* Unregister the driver */
uinfo("Unregister driver\n");
usbhost_mkdevname(priv, devname);
unregister_driver(devname);
/* Release the device name used by this connection */
usbhost_freedevno(priv);
/* Free the interrupt endpoints */
if (priv->epin)
{
DRVR_EPFREE(hport->drvr, priv->epin);
}
/* Free any transfer buffers */
usbhost_tfree(priv);
/* Destroy the semaphores */
nxsem_destroy(&priv->exclsem);
nxsem_destroy(&priv->waitsem);
/* Disconnect the USB host device */
DRVR_DISCONNECT(hport->drvr, hport);
/* Free the function address assigned to this device */
usbhost_devaddr_destroy(hport, hport->funcaddr);
hport->funcaddr = 0;
/* And free the class instance. */
usbhost_freeclass(priv);
}
/****************************************************************************
* Name: usbhost_pollnotify
*
* Description:
* Wake any threads waiting for controller data
*
* Input Parameters:
* priv - A reference to the controller state structure.
*
* Returned Value:
* None
*
****************************************************************************/
static void usbhost_pollnotify(FAR struct usbhost_state_s *priv)
{
/* If there are threads waiting for read data, then signal one of them
* that the read data is available.
*/
if (priv->nwaiters > 0)
{
nxsem_post(&priv->waitsem);
}
/* If there are threads waiting on poll() for controller data to become
* available, then wake them up now. NOTE: we wake up all waiting threads
* because we do not know that they are going to do. If they all try to
* read the data, then some make end up blocking after all.
*/
poll_notify(priv->fds, CONFIG_XBOXCONTROLLER_NPOLLWAITERS, POLLIN);
}
/****************************************************************************
* Name: usbhost_xboxcontroller_poll
*
* Description:
* Periodically check for new controller data.
*
* Input Parameters:
* arg - A reference to the class instance to be destroyed.
*
* Returned Value:
* None
*
****************************************************************************/
static int usbhost_xboxcontroller_poll(int argc, char *argv[])
{
FAR struct usbhost_state_s *priv;
FAR struct usbhost_hubport_s *hport;
irqstate_t flags;
#if defined(CONFIG_DEBUG_USB) && defined(CONFIG_DEBUG_INFO)
unsigned int npolls = 0;
#endif
unsigned int nerrors = 0;
ssize_t nbytes;
int ret = OK;
/* Synchronize with the start-up logic. Get the private instance, re-start
* the start-up logic, and wait a bit to make sure that all of the class
* creation logic has a chance to run to completion.
*
* NOTE: that the reference count is *not* incremented here. When the
* driver structure was created, it was created with a reference count of
* one. This thread is responsible for that count. The count will be
* decrement when this thread exits.
*/
priv = g_priv;
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
hport = priv->usbclass.hport;
priv->polling = true;
usbhost_givesem(&g_syncsem);
nxsig_sleep(1);
/* Loop here until the device is disconnected */
uinfo("Entering poll loop\n");
while (!priv->disconnected)
{
/* Read the next ccontroller report. We will stall here until the
* controller sends data.
*/
nbytes = DRVR_TRANSFER(hport->drvr, priv->epin,
priv->tbuffer, priv->tbuflen);
/* Check for errors -- Bail if an excessive number of consecutive
* errors are encountered.
*/
if (nbytes < 0)
{
/* If DRVR_TRANSFER() returns EAGAIN, that simply means that
* the devices was not ready and has NAK'ed the transfer. That
* should not be treated as an error (unless it persists for a
* long time).
*/
if (nbytes != -EAGAIN)
{
uerr("ERROR: DRVR_TRANSFER returned: %d/%u\n",
(int)nbytes, nerrors);
if (++nerrors > 200)
{
uerr(" Too many errors... aborting: %d\n", nerrors);
ret = (int)nbytes;
break;
}
}
}
/* The report was received correctly. */
else
{
/* Success, reset the error counter */
nerrors = 0;
/* The type of message is in the first byte */
switch (priv->tbuffer[0])
{
case USBHOST_WAITING_CONNECTION:
/* Send the initialization message when we received the
* the first waiting connection message.
*/
if (!priv->initialized)
{
/* Get exclusive access to the controller state data */
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
goto exitloop;
}
priv->tbuffer[0] = 0x05;
priv->tbuffer[1] = 0x20;
priv->tbuffer[2] = priv->out_seq_num++;
priv->tbuffer[3] = 0x01;
priv->tbuffer[4] = 0x00;
nbytes = DRVR_TRANSFER(hport->drvr, priv->epout,
priv->tbuffer, 5);
priv->initialized = true;
/* Release our lock on the state structure */
usbhost_givesem(&priv->exclsem);
}
break;
case USBHOST_GUIDE_BUTTON_STATUS:
/* Get exclusive access to the controller state data */
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
goto exitloop;
}
/* Read the data out of the controller report. */
priv->rpt.guide =
(priv->tbuffer[XBOX_BUTTON_GUIDE_INDEX] != 0) ? true : false;
priv->valid = true;
/* The One X controller requires an ACK of the guide button
* status message.
*/
if (priv->tbuffer[1] == 0x30)
{
static const uint8_t guide_button_report_ack[] =
{
0x01, 0x20, 0x00, 0x09, 0x00, 0x07, 0x20, 0x02,
0x00, 0x00, 0x00, 0x00, 0x00
};
/* Remember the input packet sequence number. */
uint8_t seq_num = priv->tbuffer[2];
/* Copy the ACK packet into the transfer buffer. */
memcpy(priv->tbuffer, guide_button_report_ack,
sizeof(guide_button_report_ack));
/* Ensure the sequence number is the same as the input
* packet.
*/
priv->tbuffer[2] = seq_num;
/* Perform the transfer. */
nbytes =
DRVR_TRANSFER(hport->drvr, priv->epout, priv->tbuffer,
sizeof(guide_button_report_ack));
}
/* Notify any waiters that new controller data is available */
usbhost_pollnotify(priv);
/* Release our lock on the state structure */
usbhost_givesem(&priv->exclsem);
break;
case USBHOST_BUTTON_DATA:
/* Ignore the controller data if no task has opened the
* driver.
*/
if (priv->open)
{
/* Get exclusive access to the controller state data */
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
goto exitloop;
}
/* Read the data out of the controller report. */
priv->rpt.sync =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_SYNC_INDEX,
XBOX_BUTTON_SYNC_MASK);
priv->rpt.start =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_START_INDEX,
XBOX_BUTTON_START_MASK);
priv->rpt.back =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_BACK_INDEX,
XBOX_BUTTON_BACK_MASK);
priv->rpt.a =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_A_INDEX,
XBOX_BUTTON_A_MASK);
priv->rpt.b =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_B_INDEX,
XBOX_BUTTON_B_MASK);
priv->rpt.x =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_X_INDEX,
XBOX_BUTTON_X_MASK);
priv->rpt.y =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_Y_INDEX,
XBOX_BUTTON_Y_MASK);
priv->rpt.dpad_up =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_DPAD_UP_INDEX,
XBOX_BUTTON_DPAD_UP_MASK);
priv->rpt.dpad_down =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_DPAD_DOWN_INDEX,
XBOX_BUTTON_DPAD_DOWN_MASK);
priv->rpt.dpad_left =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_DPAD_LEFT_INDEX,
XBOX_BUTTON_DPAD_LEFT_MASK);
priv->rpt.dpad_right =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_DPAD_RIGHT_INDEX,
XBOX_BUTTON_DPAD_RIGHT_MASK);
priv->rpt.bumper_left =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_BUMPER_LEFT_INDEX,
XBOX_BUTTON_BUMPER_LEFT_MASK);
priv->rpt.bumper_right =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_BUMPER_RIGHT_INDEX,
XBOX_BUTTON_BUMPER_RIGHT_MASK);
priv->rpt.stick_click_left =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_STICK_LEFT_INDEX,
XBOX_BUTTON_STICK_LEFT_MASK);
priv->rpt.stick_click_right =
XBOX_BUTTON_SET(priv->tbuffer,
XBOX_BUTTON_STICK_RIGHT_INDEX,
XBOX_BUTTON_STICK_RIGHT_MASK);
priv->rpt.trigger_left =
((int16_t *)(priv->tbuffer))[XBOX_BUTTON_TRIGGER_LEFT];
priv->rpt.trigger_right =
((int16_t *)(priv->tbuffer))[XBOX_BUTTON_TRIGGER_RIGHT];
priv->rpt.stick_left_x =
((int16_t *)(priv->tbuffer))[XBOX_BUTTON_STICK_LEFT_X];
priv->rpt.stick_left_y =
((int16_t *)(priv->tbuffer))[XBOX_BUTTON_STICK_LEFT_Y];
priv->rpt.stick_right_x =
((int16_t *)(priv->tbuffer))[XBOX_BUTTON_STICK_RIGHT_X];
priv->rpt.stick_right_y =
((int16_t *)(priv->tbuffer))[XBOX_BUTTON_STICK_RIGHT_Y];
priv->valid = true;
/* Notify any waiters that new controller data is
* available.
*/
usbhost_pollnotify(priv);
/* Release our lock on the state structure */
usbhost_givesem(&priv->exclsem);
}
break;
default:
uinfo("Received message type: %x\n", priv->tbuffer[0]);
}
}
/* If USB debug is on, then provide some periodic indication that
* polling is still happening.
*/
#if defined(CONFIG_DEBUG_USB) && defined(CONFIG_DEBUG_INFO)
npolls++;
if ((npolls & 31) == 0)
{
uinfo("Still polling: %d\n", npolls);
}
#endif
}
exitloop:
/* We get here when the driver is removed, when too many errors have
* been encountered, or when the thread is canceled.
*
* 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.
*/
usbhost_forcetake(&priv->exclsem);
/* Indicate that we are no longer running and decrement the reference
* count held by this thread. If there are no other users of the class,
* we can destroy it now. Otherwise, we have to wait until the all
* of the file descriptors are closed.
*/
uinfo("Controller removed, polling halted\n");
flags = enter_critical_section();
priv->polling = false;
/* Decrement the reference count held by this thread. */
DEBUGASSERT(priv->crefs > 0);
priv->crefs--;
/* There are two possibilities:
* 1) The reference count is greater than zero. This means that there
* are still open references to the controller driver. In this case
* we need to wait until usbhost_close() is called and all of the
* open driver references are decremented. Then usbhost_destroy() can
* be called from usbhost_close().
* 2) The reference count is now zero. This means that there are no
* further open references and we can call usbhost_destroy() now.
*/
if (priv->crefs < 1)
{
/* Unregister the driver and destroy the instance (while we hold
* the semaphore!)
*/
usbhost_destroy(priv);
}
else
{
/* No, we will destroy the driver instance when it is final open
* reference is closed
*/
usbhost_givesem(&priv->exclsem);
}
leave_critical_section(flags);
return ret;
}
/****************************************************************************
* Name: usbhost_sample
*
* Description:
* Check if new controller data is available
*
* Input Parameters:
* priv - controller state instance
* sample - The location to return the sample data
*
****************************************************************************/
static int usbhost_sample(FAR struct usbhost_state_s *priv,
FAR struct xbox_controller_buttonstate_s *sample)
{
irqstate_t flags;
int ret = -EAGAIN;
/* Interrupts me be disabled when this is called to (1) prevent posting
* of semaphores from interrupt handlers, and (2) to prevent sampled data
* from changing until it has been reported.
*/
flags = enter_critical_section();
/* Is there new mouse data available? */
if (priv->valid)
{
/* Return a copy of the sampled data. */
memcpy(sample, &priv->rpt,
sizeof(struct xbox_controller_buttonstate_s));
/* The sample has been reported and is no longer valid */
priv->valid = false;
ret = OK;
}
leave_critical_section(flags);
return ret;
}
/****************************************************************************
* Name: usbhost_waitsample
*
* Description:
* Wait for the next valid controller sample
*
* Input Parameters:
* priv - controller state instance
* sample - The location to return the sample data
*
****************************************************************************/
static int usbhost_waitsample(FAR struct usbhost_state_s *priv,
FAR struct xbox_controller_buttonstate_s *sample)
{
irqstate_t flags;
int ret;
/* Interrupts me be disabled when this is called to (1) prevent posting
* of semaphores from interrupt handlers, and (2) to prevent sampled data
* from changing until it has been reported.
*
* In addition, we will also disable pre-emption to prevent other threads
* from getting control while we muck with the semaphores.
*/
sched_lock();
flags = enter_critical_section();
/* Now release the semaphore that manages mutually exclusive access to
* the device structure. This may cause other tasks to become ready to
* run, but they cannot run yet because pre-emption is disabled.
*/
nxsem_post(&priv->exclsem);
/* Try to get the a sample... if we cannot, then wait on the semaphore
* that is posted when new sample data is available.
*/
while (usbhost_sample(priv, sample) < 0)
{
/* Wait for a change in the HIDMOUSE state */
iinfo("Waiting..\n");
priv->nwaiters++;
ret = nxsem_wait(&priv->waitsem);
priv->nwaiters--;
if (ret < 0)
{
ierr("ERROR: nxsem_wait: %d\n", ret);
goto errout;
}
/* Did the controller become disconnected while we were waiting */
if (priv->disconnected)
{
ret = -ENODEV;
goto errout;
}
}
iinfo("Sampled\n");
/* Re-acquire the semaphore that manages mutually exclusive access to
* the device structure. We may have to wait here. But we have our
* sample. Interrupts and pre-emption will be re-enabled while we wait.
*/
ret = nxsem_wait(&priv->exclsem);
errout:
/* Then re-enable interrupts. We might get interrupt here and there
* could be a new sample. But no new threads will run because we still
* have pre-emption disabled.
*/
leave_critical_section(flags);
/* Restore pre-emption. We might get suspended here but that is okay
* because we already have our sample. Note: this means that if there
* were two threads reading from the HIDMOUSE for some reason, the data
* might be read out of order.
*/
sched_unlock();
return ret;
}
/****************************************************************************
* 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 inline int usbhost_cfgdesc(FAR struct usbhost_state_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 epindesc;
FAR struct usbhost_epdesc_s epoutdesc;
int remaining;
uint8_t found = 0;
bool done = false;
int ret;
DEBUGASSERT(priv != NULL && priv->usbclass.hport &&
configdesc != NULL && desclen >= sizeof(struct usb_cfgdesc_s));
hport = priv->usbclass.hport;
/* Keep the compiler from complaining about uninitialized variables */
memset(&epindesc, 0, sizeof(struct usbhost_epdesc_s));
memset(&epoutdesc, 0, sizeof(struct usbhost_epdesc_s));
/* 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 dscriptors to examine */
while (remaining >= sizeof(struct usb_desc_s) && !done)
{
/* What is the next descriptor? */
desc = (FAR struct usb_desc_s *)configdesc;
switch (desc->type)
{
/* Interface descriptor. We really should get the number of endpoints
* from this descriptor too.
*/
case USB_DESC_TYPE_INTERFACE:
{
uinfo("Interface descriptor\n");
DEBUGASSERT(remaining >= USB_SIZEOF_IFDESC);
/* Did we already find what we needed from a preceding
* interface?
*/
if ((found & USBHOST_ALLFOUND) == USBHOST_ALLFOUND)
{
/* Yes.. then break out of the loop and use the preceding
* interface.
*/
done = true;
}
else
{
/* Otherwise, discard any endpoints previously found */
found = USBHOST_IFFOUND;
}
}
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 a interrupt endpoint. */
if ((epdesc->attr & USB_EP_ATTR_XFERTYPE_MASK) ==
USB_EP_ATTR_XFER_INT)
{
/* Yes.. it is a interrupt endpoint. IN or OUT? */
if (USB_ISEPOUT(epdesc->addr))
{
/* It is an OUT interrupt endpoint. There should be only
* one interrupt OUT endpoint.
*/
if ((found & USBHOST_EPOUTFOUND) != 0)
{
/* Oops.. more than one endpoint. We don't know
* what to do with this.
*/
return -EINVAL;
}
found |= USBHOST_EPOUTFOUND;
/* Save the bulk OUT endpoint information */
epoutdesc.hport = hport;
epoutdesc.addr = epdesc->addr &
USB_EP_ADDR_NUMBER_MASK;
epoutdesc.in = false;
epoutdesc.xfrtype = USB_EP_ATTR_XFER_INT;
epoutdesc.interval = epdesc->interval;
epoutdesc.mxpacketsize =
usbhost_getle16(epdesc->mxpacketsize);
uerr("Interrupt OUT EP addr:%d mxpacketsize:%d\n",
epoutdesc.addr, epoutdesc.mxpacketsize);
}
else
{
/* It is an IN interrupt endpoint. There should be only
* one interrupt IN endpoint.
*/
if ((found & USBHOST_EPINFOUND) != 0)
{
/* Oops.. more than one endpoint. We don't know
* what to do with this.
*/
return -EINVAL;
}
found |= USBHOST_EPINFOUND;
/* Save the bulk IN endpoint information */
epindesc.hport = hport;
epindesc.addr = epdesc->addr &
USB_EP_ADDR_NUMBER_MASK;
epindesc.in = true;
epindesc.xfrtype = USB_EP_ATTR_XFER_INT;
epindesc.interval = epdesc->interval;
epindesc.mxpacketsize =
usbhost_getle16(epdesc->mxpacketsize);
uerr("Interrupt IN EP addr:%d mxpacketsize:%d\n",
epindesc.addr, epindesc.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)
{
done = true;
}
/* 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 BIN:%s EPOUT:%s\n",
(found & USBHOST_IFFOUND) != 0 ? "YES" : "NO",
(found & USBHOST_EPINFOUND) != 0 ? "YES" : "NO",
(found & USBHOST_EPOUTFOUND) != 0 ? "YES" : "NO");
return -EINVAL;
}
/* We are good... Allocate the endpoints */
ret = DRVR_EPALLOC(hport->drvr, &epoutdesc, &priv->epout);
if (ret < 0)
{
uerr("ERROR: Failed to allocate Interrupt OUT endpoint\n");
return ret;
}
ret = DRVR_EPALLOC(hport->drvr, &epindesc, &priv->epin);
if (ret < 0)
{
uerr("ERROR: Failed to allocate Interrupt IN endpoint\n");
DRVR_EPFREE(hport->drvr, priv->epout);
return ret;
}
uinfo("Endpoints allocated\n");
return OK;
}
/****************************************************************************
* 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)
{
char devname[DEV_NAMELEN];
int ret = OK;
/* Set aside a transfer buffer for exclusive use by the class driver */
ret = usbhost_talloc(priv);
if (ret < 0)
{
uerr("ERROR: Failed to allocate transfer buffer\n");
return ret;
}
/* Increment the reference count. This will prevent usbhost_destroy() from
* being called asynchronously if the device is removed.
*/
priv->crefs++;
DEBUGASSERT(priv->crefs == 2);
/* Start a worker task to poll the USB device. It would be nice to use
* the NuttX worker thread to do this, but this task needs to wait for
* events and activities on the worker thread should not involve
* significant waiting. Having a dedicated thread is more efficient in
* this sense, but requires more memory resources, primarily for the
* dedicated stack (CONFIG_XBOXCONTROLLER_STACKSIZE).
*/
/* The inputs to a task started by kthread_create() are very awkward for
* this purpose. They are really designed for command line tasks
* (argc/argv). So the following is kludge pass binary data when the
* controller poll task is started.
*
* First, make sure we have exclusive access to g_priv (what is the
* likelihood of this being used? About zero, but we protect it anyway).
*/
ret = usbhost_takesem(&g_exclsem);
if (ret < 0)
{
usbhost_tfree(priv);
goto errout;
}
g_priv = priv;
uinfo("Starting thread\n");
ret = kthread_create("xbox", CONFIG_XBOXCONTROLLER_DEFPRIO,
CONFIG_XBOXCONTROLLER_STACKSIZE,
(main_t)usbhost_xboxcontroller_poll,
(FAR char * const *)NULL);
if (ret < 0)
{
/* Failed to started the poll thread... probably due to memory
* resources.
*/
usbhost_givesem(&g_exclsem);
goto errout;
}
priv->pollpid = (pid_t)ret;
/* Now wait for the poll task to get properly initialized */
usbhost_forcetake(&g_syncsem);
usbhost_givesem(&g_exclsem);
/* Configure the device */
/* Register the driver */
uinfo("Register block driver\n");
usbhost_mkdevname(priv, devname);
ret = register_driver(devname, &g_xboxcontroller_fops, 0666, priv);
/* Check if we successfully initialized. We now have to be concerned
* about asynchronous modification of crefs because the block
* driver has been registered.
*/
errout:
usbhost_forcetake(&priv->exclsem);
priv->crefs--;
usbhost_givesem(&priv->exclsem);
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
*
****************************************************************************/
#if 0 /* Not used */
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));
}
#endif
/****************************************************************************
* 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;
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL &&
priv->tbuffer == NULL);
hport = priv->usbclass.hport;
return DRVR_ALLOC(hport->drvr, &priv->tbuffer, &priv->tbuflen);
}
/****************************************************************************
* 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 int usbhost_tfree(FAR struct usbhost_state_s *priv)
{
FAR struct usbhost_hubport_s *hport;
int result = OK;
DEBUGASSERT(priv != NULL && priv->usbclass.hport != NULL);
if (priv->tbuffer)
{
hport = priv->usbclass.hport;
result = DRVR_FREE(hport->drvr, priv->tbuffer);
priv->tbuffer = NULL;
priv->tbuflen = 0;
}
return result;
}
/****************************************************************************
* 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_state_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_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 = usbhost_connect;
priv->usbclass.disconnected = usbhost_disconnected;
/* The initial reference count is 1... One reference is held by the
* driver.
*/
priv->crefs = 1;
/* Initialize semaphores (this works okay in the interrupt
* context).
*/
nxsem_init(&priv->exclsem, 0, 1);
nxsem_init(&priv->waitsem, 0, 0);
/* The waitsem semaphore is used for signaling and, hence, should
* not have priority inheritance enabled.
*/
nxsem_set_protocol(&priv->waitsem, SEM_PRIO_NONE);
/* 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_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 = 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_state_s *priv = (FAR struct usbhost_state_s *)usbclass;
int i;
DEBUGASSERT(priv != NULL);
/* Set an indication to any users of the device that the device is no
* longer available.
*/
priv->disconnected = true;
uinfo("Disconnected\n");
/* Are there a thread(s) waiting for controller data that will never
* come?
*/
for (i = 0; i < priv->nwaiters; i++)
{
/* Yes.. wake them up */
usbhost_givesem(&priv->waitsem);
}
/* Possibilities:
*
* - Failure occurred before the controller poll task was started
* successfully. In this case, the disconnection will have to be
* handled on the worker task.
* - Failure occurred after the controller poll task was started
* successfully. In this case, the disconnection can be performed on
* the mouse poll thread.
*/
if (priv->polling)
{
/* The polling task is still alive. Signal the mouse polling task.
* When that task wakes up, it will decrement the reference count and,
* perhaps, destroy the class instance. Then it will exit.
*/
nxsig_kill(priv->pollpid, SIGALRM);
}
else
{
/* In the case where the failure occurs before the polling task was
* started. Now what? We are probably executing from an interrupt
* handler here. We will use the worker thread. This is kind of
* wasteful and begs for a re-design.
*/
DEBUGASSERT(priv->work.worker == NULL);
work_queue(HPWORK, &priv->work, usbhost_destroy, priv, 0);
}
return OK;
}
/****************************************************************************
* Character driver methods
****************************************************************************/
/****************************************************************************
* Name: usbhost_open
*
* Description:
* Standard character driver open method.
*
****************************************************************************/
static int usbhost_open(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct usbhost_state_s *priv;
irqstate_t flags;
int ret;
uinfo("Entry\n");
DEBUGASSERT(filep && filep->f_inode);
inode = filep->f_inode;
priv = inode->i_private;
/* Make sure that we have exclusive access to the private data structure */
DEBUGASSERT(priv && priv->crefs > 0 && priv->crefs < USBHOST_MAX_CREFS);
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
return ret;
}
/* Check if the controller device is still connected. We need to disable
* interrupts momentarily to assure that there are no asynchronous
* disconnect events.
*/
flags = enter_critical_section();
if (priv->disconnected)
{
/* No... the driver is no longer bound to the class. That means that
* the USB storage device is no longer connected. Refuse any further
* attempts to open the driver.
*/
ret = -ENODEV;
}
else
{
/* Was the driver previously open? We need to perform special
* initialization on the first time that the driver is opened.
*/
if (!priv->open)
{
/* Set the thresholding values so that the first button press
* will be reported.
*/
#ifdef NEVER
priv->xlast = INVALID_POSITION_B16;
priv->ylast = INVALID_POSITION_B16;
#ifdef CONFIG_INPUT_MOUSE_WHEEL
priv->wlast = INVALID_POSITION_B16;
#endif
/* Set the reported position to the center of the range */
priv->xaccum = (HIDMOUSE_XMAX_B16 >> 1);
priv->yaccum = (HIDMOUSE_YMAX_B16 >> 1);
#endif
}
/* Otherwise, just increment the reference count on the driver */
priv->crefs++;
priv->open = true;
ret = OK;
}
leave_critical_section(flags);
usbhost_givesem(&priv->exclsem);
return ret;
}
/****************************************************************************
* Name: usbhost_close
*
* Description:
* Standard character driver close method.
*
****************************************************************************/
static int usbhost_close(FAR struct file *filep)
{
FAR struct inode *inode;
FAR struct usbhost_state_s *priv;
irqstate_t flags;
int ret;
uinfo("Entry\n");
DEBUGASSERT(filep && filep->f_inode);
inode = filep->f_inode;
priv = inode->i_private;
/* Decrement the reference count on the driver */
DEBUGASSERT(priv->crefs >= 1);
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
return ret;
}
/* We need to disable interrupts momentarily to assure that there are no
* asynchronous poll or disconnect events.
*/
flags = enter_critical_section();
priv->crefs--;
/* Check if the USB controller device is still connected. If the device is
* no longer connected, then unregister the driver and free the driver
* class instance.
*/
if (priv->disconnected)
{
/* If the reference count is one or less then there are two
* possibilities:
*
* 1) It might be zero meaning that the polling thread has already
* exited and decremented its count.
* 2) If might be one meaning either that (a) the polling thread is
* still running and still holds a count, or (b) the polling thread
* has exited, but there is still an outstanding open reference.
*/
if (priv->crefs == 0 || (priv->crefs == 1 && priv->polling))
{
/* Yes.. In either case, then the driver is no longer open */
priv->open = false;
/* Check if the USB keyboard device is still connected. */
if (priv->crefs == 0)
{
/* The polling thread is no longer running */
DEBUGASSERT(!priv->polling);
/* If the device is no longer connected, unregister the driver
* and free the driver class instance.
*/
usbhost_destroy(priv);
/* Skip giving the semaphore... it is no longer valid */
leave_critical_section(flags);
return OK;
}
else /* if (priv->crefs == 1) */
{
/* The polling thread is still running. Signal it so that it
* will wake up and call usbhost_destroy(). The particular
* signal that we use does not matter in this case.
*/
nxsig_kill(priv->pollpid, SIGALRM);
}
}
}
usbhost_givesem(&priv->exclsem);
leave_critical_section(flags);
return OK;
}
/****************************************************************************
* Name: usbhost_read
*
* Description:
* Standard character driver read method.
*
****************************************************************************/
static ssize_t usbhost_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode;
FAR struct usbhost_state_s *priv;
FAR struct xbox_controller_buttonstate_s sample;
int ret;
DEBUGASSERT(filep && filep->f_inode && buffer);
inode = filep->f_inode;
priv = inode->i_private;
/* Make sure that we have exclusive access to the private data structure */
DEBUGASSERT(priv && priv->crefs > 0 && priv->crefs < USBHOST_MAX_CREFS);
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
return ret;
}
/* Check if the controller is still connected. We need to disable
* interrupts momentarily to assure that there are no asynchronous
* disconnect events.
*/
if (priv->disconnected)
{
/* No... the driver is no longer bound to the class. That means that
* the USB controller is no longer connected. Refuse any further
* attempts to access the driver.
*/
ret = -ENODEV;
goto errout;
}
/* Try to read sample data. */
ret = usbhost_sample(priv, &sample);
if (ret < 0)
{
/* Sample data is not available now. We would ave to wait to get
* receive sample data. If the user has specified the O_NONBLOCK
* option, then just return an error.
*/
if (filep->f_oflags & O_NONBLOCK)
{
/* Yes.. then return a failure */
ret = -EAGAIN;
goto errout;
}
/* Wait for sample data */
ret = usbhost_waitsample(priv, &sample);
ret = 0;
if (ret < 0)
{
/* We might have been awakened by a signal */
ierr("ERROR: usbhost_waitsample: %d\n", ret);
goto errout;
}
}
/* We now have sampled controller data that we can report to the caller. */
memcpy(buffer, &sample, sizeof(struct xbox_controller_buttonstate_s));
ret = sizeof(struct xbox_controller_buttonstate_s);
errout:
usbhost_givesem(&priv->exclsem);
iinfo("Returning: %d\n", ret);
return (ssize_t)ret;
}
/****************************************************************************
* Name: usbhost_write
*
* Description:
* Standard character driver write method.
*
****************************************************************************/
static ssize_t usbhost_write(FAR struct file *filep, FAR const char *buffer,
size_t len)
{
/* Not implemented. */
return -ENOSYS;
}
/****************************************************************************
* Name: usbhost_ioctl
*
* Description:
* Standard character driver ioctl method.
*
****************************************************************************/
static int usbhost_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
{
FAR struct inode *inode;
FAR struct usbhost_state_s *priv;
int ret = 0;
int nbytes;
FAR struct usbhost_hubport_s *hport;
static uint8_t rumble_cmd[] =
{
0x09, 0x00, 0x00, 0x09, 0x00, 0x0f, 0x00,
0x00, 0x00, 0x00, 0xff, 0x00, 0xff
};
uinfo("Entered\n");
DEBUGASSERT(filep && filep->f_inode && buffer);
inode = filep->f_inode;
priv = inode->i_private;
hport = priv->usbclass.hport;
/* Check if the controller is still connected. We need to disable
* interrupts momentarily to assure that there are no asynchronous
* disconnect events.
*/
if (priv->disconnected)
{
/* No... the driver is no longer bound to the class. That means that
* the USB controller is no longer connected. Refuse any further
* attempts to access the driver.
*/
ret = -ENODEV;
goto errout;
}
/* Determine which IOCTL command to execute. */
switch (cmd)
{
case XBOX_CONTROLLER_IOCTL_RUMBLE:
/* The least significant byte is the weak actuator strength.
* The second byte is the strong actuator strength.
*/
memcpy(priv->obuffer, rumble_cmd, sizeof(rumble_cmd));
priv->obuffer[2] = priv->out_seq_num++;
priv->obuffer[8] = (arg >> 1) & 0xff; /* Strong (left actuator) */
priv->obuffer[9] = arg & 0xff; /* Weak (right actuator) */
/* Perform the transfer. */
nbytes = DRVR_TRANSFER(hport->drvr, priv->epout,
priv->obuffer, sizeof(rumble_cmd));
/* Did we encounter an error? */
if (nbytes < 0)
{
ret = nbytes;
}
break;
default:
ret = -ENOTTY;
goto errout;
}
errout:
iinfo("Returning: %d\n", ret);
return ret;
}
/****************************************************************************
* Name: usbhost_poll
*
* Description:
* Standard character driver poll method.
*
****************************************************************************/
static int usbhost_poll(FAR struct file *filep, FAR struct pollfd *fds,
bool setup)
{
FAR struct inode *inode;
FAR struct usbhost_state_s *priv;
int ret;
int i;
DEBUGASSERT(filep && filep->f_inode && fds);
inode = filep->f_inode;
priv = inode->i_private;
/* Make sure that we have exclusive access to the private data structure */
DEBUGASSERT(priv);
ret = usbhost_takesem(&priv->exclsem);
if (ret < 0)
{
return ret;
}
/* Check if the controller is still connected. We need to disable
* interrupts momentarily to assure that there are no asynchronous
* disconnect events.
*/
if (priv->disconnected)
{
/* No... the driver is no longer bound to the class. That means that
* the USB controller is no longer connected. Refuse any further
* attempts to access the driver.
*/
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_XBOXCONTROLLER_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_XBOXCONTROLLER_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 buffered controller data.
*/
if (priv->valid)
{
usbhost_pollnotify(priv);
}
}
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:
nxsem_post(&priv->exclsem);
return ret;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: usbhost_xboxcontroller_init
*
* 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_xboxcontroller_init(void)
{
/* Perform any one-time initialization of the class implementation */
nxsem_init(&g_exclsem, 0, 1);
nxsem_init(&g_syncsem, 0, 0);
/* The g_syncsem semaphore is used for signaling and, hence, should not
* have priority inheritance enabled.
*/
nxsem_set_protocol(&g_syncsem, SEM_PRIO_NONE);
/* Advertise our availability to support (certain) devices */
return usbhost_registerclass(&g_xboxcontroller);
}
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