diff options
Diffstat (limited to 'nuttx/drivers/usbhost/usbhost_hidkbd.c')
| -rw-r--r-- | nuttx/drivers/usbhost/usbhost_hidkbd.c | 2353 |
1 files changed, 0 insertions, 2353 deletions
diff --git a/nuttx/drivers/usbhost/usbhost_hidkbd.c b/nuttx/drivers/usbhost/usbhost_hidkbd.c deleted file mode 100644 index d6a9ceda3..000000000 --- a/nuttx/drivers/usbhost/usbhost_hidkbd.c +++ /dev/null @@ -1,2353 +0,0 @@ -/**************************************************************************** - * drivers/usbhost/usbhost_hidkbd.c - * - * Copyright (C) 2011-2012 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <sys/types.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <unistd.h> -#include <string.h> -#include <poll.h> -#include <semaphore.h> -#include <time.h> -#include <fcntl.h> -#include <assert.h> -#include <errno.h> -#include <debug.h> - -#include <nuttx/kmalloc.h> -#include <nuttx/fs/fs.h> -#include <nuttx/arch.h> -#include <nuttx/wqueue.h> - -#include <nuttx/usb/usb.h> -#include <nuttx/usb/usbhost.h> -#include <nuttx/usb/hid.h> - -#ifdef CONFIG_HIDKBD_ENCODED -# include <nuttx/streams.h> -# include <nuttx/input/kbd_codec.h> -#endif - -/* Don't compile if prerequisites are not met */ - -#if defined(CONFIG_USBHOST) && !defined(CONFIG_USBHOST_INT_DISABLE) && CONFIG_NFILE_DESCRIPTORS > 0 - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ -/* Configuration ************************************************************/ -/* This determines how often the USB keyboard will be polled in units of - * of microseconds. The default is 100MS. - */ - -#ifndef CONFIG_HIDKBD_POLLUSEC -# define CONFIG_HIDKBD_POLLUSEC (100*1000) -#endif - -/* Worker thread is needed, unfortunately, to handle some cornercase failure - * conditions. This is kind of wasteful and begs for a re-design. - */ - -#ifndef CONFIG_SCHED_WORKQUEUE -# warning "Worker thread support is required (CONFIG_SCHED_WORKQUEUE)" -#endif - -/* Signals must not be disabled as they are needed by usleep. Need to have - * CONFIG_DISABLE_SIGNALS=n - */ - -#ifdef CONFIG_DISABLE_SIGNALS -# warning "Signal support is required (CONFIG_DISABLE_SIGNALS)" -#endif - -/* Provide some default values for other configuration settings */ - -#ifndef CONFIG_HIDKBD_DEFPRIO -# define CONFIG_HIDKBD_DEFPRIO 50 -#endif - -#ifndef CONFIG_HIDKBD_STACKSIZE -# define CONFIG_HIDKBD_STACKSIZE 1024 -#endif - -#ifndef CONFIG_HIDKBD_BUFSIZE -# define CONFIG_HIDKBD_BUFSIZE 64 -#endif - -#ifndef CONFIG_HIDKBD_NPOLLWAITERS -# define CONFIG_HIDKBD_NPOLLWAITERS 2 -#endif - -/* The default is to support scancode mapping for the standard 104 key - * keyboard. Setting CONFIG_HIDKBD_RAWSCANCODES will disable all scancode - * mapping; Setting CONFIG_HIDKBD_ALLSCANCODES will enable mapping of all - * scancodes; - */ - -#ifndef CONFIG_HIDKBD_RAWSCANCODES -# ifdef CONFIG_HIDKBD_ALLSCANCODES -# define USBHID_NUMSCANCODES (USBHID_KBDUSE_MAX+1) -# else -# define USBHID_NUMSCANCODES 104 -# endif -#endif - -/* We cant support encoding of special characters of unless the Keyboard - * CODEC is enabled. - */ - -#ifndef CONFIG_LIB_KBDCODEC -# undef CONFIG_HIDKBD_ENCODED -#endif - -/* If we are using raw scancodes, then we cannot support encoding of - * special characters either. - */ - -#ifdef CONFIG_HIDKBD_RAWSCANCODES -# undef CONFIG_HIDKBD_ENCODED -#endif - -/* Driver support ***********************************************************/ -/* This format is used to construct the /dev/kbd[n] device driver path. It - * defined here so that it will be used consistently in all places. - */ - -#define DEV_FORMAT "/dev/kbd%c" -#define DEV_NAMELEN 11 - -/* Used in usbhost_cfgdesc() */ - -#define USBHOST_IFFOUND 0x01 /* Required I/F descriptor found */ -#define USBHOST_EPINFOUND 0x02 /* Required interrupt IN EP descriptor found */ -#define USBHOST_EPOUTFOUND 0x04 /* Optional interrupt OUT EP descriptor found */ -#define USBHOST_RQDFOUND (USBHOST_IFFOUND|USBHOST_EPINFOUND) -#define USBHOST_ALLFOUND (USBHOST_RQDFOUND|USBHOST_EPOUTFOUND) - -#define USBHOST_MAX_CREFS 0x7fff - -/* Debug ********************************************************************/ -/* Both CONFIG_DEBUG_INPUT and CONFIG_DEBUG_USB could apply to this file. - * We assume here that CONFIG_DEBUG_INPUT might be enabled separately, but - * CONFIG_DEBUG_USB implies both. - */ - -#ifndef CONFIG_DEBUG_INPUT -# undef idbg -# define idbg udbg -# undef illdbg -# define illdbg ulldbg -# undef ivdbg -# define ivdbg uvdbg -# undef illvdbg -# define illvdbg ullvdbg -#endif - -/**************************************************************************** - * Private Types - ****************************************************************************/ - -/* This structure contains the internal, private state of the USB host - * keyboard storage class. - */ - -struct usbhost_state_s -{ - /* This is the externally visible portion of the state */ - - struct usbhost_class_s class; - - /* This is an instance of the USB host driver bound to this class instance */ - - struct usbhost_driver_s *drvr; - - /* The remainder of the fields are provide o the keyboard class driver */ - - char devchar; /* Character identifying the /dev/kbd[n] device */ - volatile bool disconnected; /* TRUE: Device has been disconnected */ - volatile bool polling; /* TRUE: Poll thread is running */ - volatile bool open; /* TRUE: The keyboard device is open */ - volatile bool waiting; /* TRUE: waiting for keyboard data */ - uint8_t ifno; /* Interface number */ - int16_t crefs; /* Reference count on the driver instance */ - sem_t exclsem; /* Used to maintain mutual exclusive access */ - sem_t waitsem; /* Used to wait for keyboard data */ - FAR uint8_t *tbuffer; /* The allocated transfer buffer */ - size_t tbuflen; /* Size of the allocated transfer buffer */ - pid_t pollpid; /* PID of the poll task */ - struct work_s work; /* For cornercase error handling by the worker thread */ - - /* Endpoints: - * EP0 (Control): - * - Receiving and responding to requests for USB control and class data. - * - IN data when polled by the HID class driver (Get_Report) - * - OUT data from the host. - * EP Interrupt IN: - * - Receiving asynchronous (unrequested) IN data from the device. - * EP Interrrupt OUT (optional): - * - Transmitting low latency OUT data to the device. - * - If not present, EP0 used. - */ - - usbhost_ep_t epin; /* Interrupt IN endpoint */ - usbhost_ep_t epout; /* Optional interrupt OUT endpoint */ - - /* 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'. - */ - -#ifndef CONFIG_DISABLE_POLL - struct pollfd *fds[CONFIG_HIDKBD_NPOLLWAITERS]; -#endif - - /* Buffer used to collect and buffer incoming keyboard characters */ - - volatile uint16_t headndx; /* Buffer head index */ - volatile uint16_t tailndx; /* Buffer tail index */ - uint8_t kbdbuffer[CONFIG_HIDKBD_BUFSIZE]; -}; - -/* This type is used for encoding special characters */ - -#ifdef CONFIG_HIDKBD_ENCODED -struct usbhost_outstream_s -{ - struct lib_outstream_s stream; - FAR struct usbhost_state_s *priv; -}; -#endif - -/**************************************************************************** - * Private Function Prototypes - ****************************************************************************/ - -/* Semaphores */ - -static void usbhost_takesem(sem_t *sem); -#define usbhost_givesem(s) sem_post(s); - -/* Polling support */ - -#ifndef CONFIG_DISABLE_POLL -static void usbhost_pollnotify(FAR struct usbhost_state_s *dev); -#else -# define usbhost_pollnotify(dev) -#endif - -/* Memory allocation services */ - -static inline FAR struct usbhost_state_s *usbhost_allocclass(void); -static inline void usbhost_freeclass(FAR struct usbhost_state_s *class); - -/* 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, char *devname); - -/* Keyboard polling thread */ - -static void usbhost_destroy(FAR void *arg); -static void usbhost_putbuffer(FAR struct usbhost_state_s *priv, uint8_t keycode); -#ifdef CONFIG_HIDKBD_ENCODED -static void usbhost_putstream(FAR struct lib_outstream_s *this, int ch); -#endif -static inline uint8_t usbhost_mapscancode(uint8_t scancode, uint8_t modifier); -#ifdef CONFIG_HIDKBD_ENCODED -static inline void usbhost_encodescancode(FAR struct usbhost_state_s *priv, - uint8_t scancode, uint8_t modifier); -#endif -static int usbhost_kbdpoll(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, - uint8_t funcaddr); -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_tdalloc(FAR struct usbhost_state_s *priv); -static inline int usbhost_tdfree(FAR struct usbhost_state_s *priv); - -/* struct usbhost_registry_s methods */ - -static struct usbhost_class_s *usbhost_create(FAR struct usbhost_driver_s *drvr, - FAR const struct usbhost_id_s *id); - -/* struct usbhost_class_s methods */ - -static int usbhost_connect(FAR struct usbhost_class_s *class, - FAR const uint8_t *configdesc, int desclen, - uint8_t funcaddr); -static int usbhost_disconnected(FAR struct usbhost_class_s *class); - -/* Driver methods. We export the keyboard 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); -#ifndef CONFIG_DISABLE_POLL -static int usbhost_poll(FAR struct file *filep, FAR struct pollfd *fds, - bool setup); -#endif - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/* This structure provides the registry entry ID informatino that will be - * used to associate the USB host keyboard class driver to a connected USB - * device. - */ - -static const const struct usbhost_id_s g_id = -{ - USB_CLASS_HID, /* base */ - USBHID_SUBCLASS_BOOTIF, /* subclass */ - USBHID_PROTOCOL_KEYBOARD, /* proto */ - 0, /* vid */ - 0 /* pid */ -}; - -/* This is the USB host storage class's registry entry */ - -static struct usbhost_registry_s g_skeleton = -{ - NULL, /* flink */ - usbhost_create, /* create */ - 1, /* nids */ - &g_id /* id[] */ -}; - -static const struct file_operations usbhost_fops = -{ - usbhost_open, /* open */ - usbhost_close, /* close */ - usbhost_read, /* read */ - usbhost_write, /* write */ - 0, /* seek */ - 0 /* ioctl */ -#ifndef CONFIG_DISABLE_POLL - , usbhost_poll /* poll */ -#endif -}; - -/* This is a bitmap that is used to allocate device names /dev/kbda-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 */ - -/* The following tables map keyboard scan codes to printable ASIC - * characters. There is no support here for function keys or cursor - * controls. - */ - -#ifndef CONFIG_HIDKBD_RAWSCANCODES -#ifdef CONFIG_HIDKBD_ENCODED - -/* The first and last scancode values with encode-able values */ - -#define FIRST_ENCODING USBHID_KBDUSE_ENTER /* 0x28 Keyboard Return (ENTER) */ -#ifndef CONFIG_HIDKBD_ALLSCANCODES -# define LAST_ENCODING USBHID_KBDUSE_POWER /* 0x66 Keyboard Power */ -#else -# define LAST_ENCODING USBHID_KBDUSE_KPDHEXADECIMAL /* 0xdd Keypad Hexadecimal */ -#endif - -#define USBHID_NUMENCODINGS (LAST_ENCODING - FIRST_ENCODING + 1) - -static const uint8_t encoding[USBHID_NUMENCODINGS] = -{ - /* 0x28-0x2f: Enter,escape,del,back-tab,space,_,+,{ */ - - KEYCODE_ENTER, 0, KEYCODE_FWDDEL, KEYCODE_BACKDEL, 0, 0, 0, 0, - - /* 0x30-0x37: },|,Non-US tilde,:,",grave tilde,<,> */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0x38-0x3f: /,CapsLock,F1,F2,F3,F4,F5,F6 */ - - 0, KEYCODE_CAPSLOCK, KEYCODE_F1, KEYCODE_F2, KEYCODE_F3, KEYCODE_F4, KEYCODE_F5, KEYCODE_F6, - - /* 0x40-0x47: F7,F8,F9,F10,F11,F12,PrtScn,ScrollLock */ - - KEYCODE_F7, KEYCODE_F8, KEYCODE_F9, KEYCODE_F10, KEYCODE_F11, KEYCODE_F12, KEYCODE_PRTSCRN, KEYCODE_SCROLLLOCK, - - /* 0x48-0x4f: Pause,Insert,Home,PageUp,DeleteForward,End,PageDown,RightArrow */ - - KEYCODE_PAUSE, KEYCODE_INSERT, KEYCODE_HOME, KEYCODE_PAGEUP, KEYCODE_FWDDEL, KEYCODE_END, KEYCODE_PAGEDOWN, KEYCODE_RIGHT, - - /* 0x50-0x57: LeftArrow,DownArrow,UpArrow,Num Lock,/,*,-,+ */ - - KEYCODE_LEFT, KEYCODE_DOWN, KEYCODE_UP, KEYCODE_NUMLOCK, 0, 0, 0, 0, - - /* 0x58-0x5f: Enter,1-7 */ - - KEYCODE_ENTER, 0, 0, 0, 0, 0, 0, 0, - - /* 0x60-0x66: 8-9,0,.,Non-US \,Application,Power */ - - 0, 0, 0, 0, 0, 0, KEYCODE_POWER, - -#ifdef CONFIG_HIDKBD_ALLSCANCODES - - 0, /* 0x67 = */ - - /* 0x68-0x6f: F13,F14,F15,F16,F17,F18,F19,F20 */ - - KEYCODE_F13, KEYCODE_F14, KEYCODE_F15, KEYCODE_F16, KEYCODE_F17, KEYCODE_F18, KEYCODE_F19, KEYCODE_F20, - - /* 0x70-0x77: F21,F22,F23,F24,Execute,Help,Menu,Select */ - - KEYCODE_F21, KEYCODE_F22, KEYCODE_F23, KEYCODE_F24, KEYCODE_EXECUTE, KEYCODE_HELP, KEYCODE_MENU, KEYCODE_SELECT, - - /* 0x78-0x7f: Stop,Again,Undo,Cut,Copy,Paste,Find,Mute */ - - KEYCODE_STOP, KEYCODE_AGAIN, KEYCODE_UNDO, KEYCODE_CUT, KEYCODE_COPY, KEYCODE_PASTE, KEYCODE_FIND, KEYCODE_MUTE, - - /* 0x80-0x87: VolUp,VolDown,LCapsLock,lNumLock,LScrollLock,,,=,International1 */ - - KEYCODE_VOLUP, KEYCODE_VOLDOWN, KEYCODE_LCAPSLOCK, KEYCODE_LNUMLOCK, KEYCODE_LSCROLLLOCK, 0, 0, 0, - - /* 0x88-0x8f: International 2-9 */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0x90-0x97: LAN 1-8 */ - - KEYCODE_LANG1, KEYCODE_LANG2, KEYCODE_LANG3, KEYCODE_LANG4, KEYCODE_LANG5, KEYCODE_LANG6, KEYCODE_LANG7, KEYCODE_LANG8, - - /* 0x98-0x9f: LAN 9,Erase,SysReq,Cancel,Clear,Prior,Return,Separator */ - - 0, 0, KEYCODE_SYSREQ, KEYCODE_CANCEL, KEYCODE_CLEAR, 0, KEYCODE_ENTER, 0, - - /* 0xa0-0xa7: Out,Oper,Clear,CrSel,Excel,(reserved) */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0xa8-0xaf: (reserved) */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0xb0-0xb7: 00,000,ThouSeparator,DecSeparator,CurrencyUnit,SubUnit,(,) */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0xb8-0xbf: {,},tab,backspace,A-D */ - - 0, 0, 0, KEYCODE_BACKDEL, 0, 0, 0, 0, - - /* 0xc0-0xc7: E-F,XOR,^,%,<,>,& */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0xc8-0xcf: &&,|,||,:,#, ,@,! */ - - 0, 0, 0, 0, 0, 0, 0, 0, - - /* 0xd0-0xd7: Memory Store,Recall,Clear,Add,Subtract,Muliply,Divide,+/- */ - - KEYCODE_MEMSTORE, KEYCODE_MEMRECALL, KEYCODE_MEMCLEAR, KEYCODE_MEMADD, KEYCODE_MEMSUB, KEYCODE_MEMMUL, KEYCODE_MEMDIV, KEYCODE_NEGATE, - - /* 0xd8-0xdd: Clear,ClearEntry,Binary,Octal,Decimal,Hexadecimal */ - - KEYCODE_CLEAR, KEYCODE_CLEARENTRY, KEYCODE_BINARY, KEYCODE_OCTAL, KEYCODE_DECIMAL, KEYCODE_HEXADECIMAL -#endif -}; - -#endif - -static const uint8_t ucmap[USBHID_NUMSCANCODES] = -{ - 0, 0, 0, 0, 'A', 'B', 'C', 'D', /* 0x00-0x07: Reserved, errors, A-D */ - 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', /* 0x08-0x0f: E-L */ - 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', /* 0x10-0x17: M-T */ - 'U', 'V', 'W', 'X', 'Y', 'Z', '!', '@', /* 0x18-0x1f: U-Z,!,@ */ - '#', '$', '%', '^', '&', '*', '(', ')', /* 0x20-0x27: #,$,%,^,&,*,(,) */ - '\n', '\033', '\177', 0, ' ', '_', '+', '{', /* 0x28-0x2f: Enter,escape,del,back-tab,space,_,+,{ */ - '}', '|', 0, ':', '"', '~', '<', '>', /* 0x30-0x37: },|,Non-US tilde,:,",grave tilde,<,> */ - '?', 0, 0, 0, 0, 0, 0, 0, /* 0x38-0x3f: /,CapsLock,F1,F2,F3,F4,F5,F6 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40-0x47: F7,F8,F9,F10,F11,F12,PrtScn,ScrollLock */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x48-0x4f: Pause,Insert,Home,PageUp,DeleteForward,End,PageDown,RightArrow */ - 0, 0, 0, 0, '/', '*', '-', '+', /* 0x50-0x57: LeftArrow,DownArrow,UpArrow,Num Lock,/,*,-,+ */ - '\n', '1', '2', '3', '4', '5', '6', '7', /* 0x58-0x5f: Enter,1-7 */ - '8', '9', '0', '.', 0, 0, 0, '=', /* 0x60-0x67: 8-9,0,.,Non-US \,Application,Power,= */ -#ifdef CONFIG_HIDKBD_ALLSCANCODES - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x68-0x6f: F13,F14,F15,F16,F17,F18,F19,F20 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70-0x77: F21,F22,F23,F24,Execute,Help,Menu,Select */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x78-0x7f: Stop,Again,Undo,Cut,Copy,Paste,Find,Mute */ - 0, 0, 0, 0, 0, ',', 0, 0, /* 0x80-0x87: VolUp,VolDown,LCapsLock,lNumLock,LScrollLock,,,=,International1 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x88-0x8f: International 2-9 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90-0x97: LAN 1-8 */ - 0, 0, 0, 0, 0, 0, '\n', 0, /* 0x98-0x9f: LAN 9,Erase,SysReq,Cancel,Clear,Prior,Return,Separator */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0-0xa7: Out,Oper,Clear,CrSel,Excel,(reserved) */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa8-0xaf: (reserved) */ - 0, 0, 0, 0, 0, 0, '(', ')', /* 0xb0-0xb7: 00,000,ThouSeparator,DecSeparator,CurrencyUnit,SubUnit,(,) */ - '{', '}', '\t', \177, 'A', 'B', 'C', 'D', /* 0xb8-0xbf: {,},tab,backspace,A-D */ - 'F', 'F', 0, '^', '%', '<', '>', '&', /* 0xc0-0xc7: E-F,XOR,^,%,<,>,& */ - 0, '|', 0, ':', '%', ' ', '@', '!', /* 0xc8-0xcf: &&,|,||,:,#, ,@,! */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0-0xd7: Memory Store,Recall,Clear,Add,Subtract,Muliply,Divide,+/- */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd8-0xdf: Clear,ClearEntry,Binary,Octal,Decimal,Hexadecimal */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0-0xe7: Left Ctrl,Shift,Alt,GUI, Right Ctrl,Shift,Alt,GUI */ -#endif -}; - -static const uint8_t lcmap[USBHID_NUMSCANCODES] = -{ - 0, 0, 0, 0, 'a', 'b', 'c', 'd', /* 0x00-0x07: Reserved, errors, a-d */ - 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', /* 0x08-0x0f: e-l */ - 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', /* 0x10-0x17: m-t */ - 'u', 'v', 'w', 'x', 'y', 'z', '1', '2', /* 0x18-0x1f: u-z,1-2 */ - '3', '4', '5', '6', '7', '8', '9', '0', /* 0x20-0x27: 3-9,0 */ - '\n', '\033', '\177', '\t', ' ', '-', '=', '[', /* 0x28-0x2f: Enter,escape,del,tab,space,-,=,[ */ - ']', '\\', '\234', ';', '\'', '`', ',', '.', /* 0x30-0x37: ],\,Non-US pound,;,',grave accent,,,. */ - '/', 0, 0, 0, 0, 0, 0, 0, /* 0x38-0x3f: /,CapsLock,F1,F2,F3,F4,F5,F6 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40-0x47: F7,F8,F9,F10,F11,F12,PrtScn,ScrollLock */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x48-0x4f: Pause,Insert,Home,PageUp,DeleteForward,End,PageDown,RightArrow */ - 0, 0, 0, 0, '/', '*', '-', '+', /* 0x50-0x57: LeftArrow,DownArrow,UpArrow,Num Lock,/,*,-,+ */ - '\n', '1', '2', '3', '4', '5', '6', '7', /* 0x58-0x5f: Enter,1-7 */ - '8', '9', '0', '.', 0, 0, 0, '=', /* 0x60-0x67: 8-9,0,.,Non-US \,Application,Power,= */ -#ifdef CONFIG_HIDKBD_ALLSCANCODES - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x68-0x6f: F13,F14,F15,F16,F17,F18,F19,F20 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70-0x77: F21,F22,F23,F24,Execute,Help,Menu,Select */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x78-0x7f: Stop,Again,Undo,Cut,Copy,Paste,Find,Mute */ - 0, 0, 0, 0, 0, ',', 0, 0, /* 0x80-0x87: VolUp,VolDown,LCapsLock,lNumLock,LScrollLock,,,=,International1 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x88-0x8f: International 2-9 */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90-0x97: LAN 1-8 */ - 0, 0, 0, 0, 0, 0, '\n', 0, /* 0x98-0x9f: LAN 9,Erase,SysReq,Cancel,Clear,Prior,Return,Separator */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0-0xa7: Out,Oper,Clear,CrSel,Excel,(reserved) */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa8-0xaf: (reserved) */ - 0, 0, 0, 0, 0, 0, '(', ')', /* 0xb0-0xb7: 00,000,ThouSeparator,DecSeparator,CurrencyUnit,SubUnit,(,) */ - '{', '}', '\t', '\177', 'A', 'B', 'C', 'D', /* 0xb8-0xbf: {,},tab,backspace,A-D */ - 'F', 'F', 0, '^', '%', '<', '>', '&', /* 0xc0-0xc7: E-F,XOR,^,%,<,>,& */ - 0, '|', 0, ':', '%', ' ', '@', '!', /* 0xc8-0xcf: &&,|,||,:,#, ,@,! */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0-0xd7: Memory Store,Recall,Clear,Add,Subtract,Muliply,Divide,+/- */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd8-0xdf: Clear,ClearEntry,Binary,Octal,Decimal,Hexadecimal */ - 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0-0xe7: Left Ctrl,Shift,Alt,GUI, Right Ctrl,Shift,Alt,GUI */ -#endif -}; -#endif /* CONFIG_HIDKBD_RAWSCANCODES */ - -/**************************************************************************** - * 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 void usbhost_takesem(sem_t *sem) -{ - /* Take the semaphore (perhaps waiting) */ - - while (sem_wait(sem) != 0) - { - /* The only case that an error should occr here is if the wait was - * awakened by a signal. - */ - - ASSERT(errno == EINTR); - } -} - -/**************************************************************************** - * Name: usbhost_pollnotify - ****************************************************************************/ - -#ifndef CONFIG_DISABLE_POLL -static void usbhost_pollnotify(FAR struct usbhost_state_s *priv) -{ - int i; - - for (i = 0; i < CONFIG_HIDKBD_NPOLLWAITERS; i++) - { - struct pollfd *fds = priv->fds[i]; - if (fds) - { - fds->revents |= (fds->events & POLLIN); - if (fds->revents != 0) - { - uvdbg("Report events: %02x\n", fds->revents); - sem_post(fds->sem); - } - } - } -} -#endif - -/**************************************************************************** - * 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 Values: - * 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 *)kmalloc(sizeof(struct usbhost_state_s)); - uvdbg("Allocated: %p\n", priv);; - return priv; -} - -/**************************************************************************** - * Name: usbhost_freeclass - * - * Description: - * Free a class instance previously allocated by usbhost_allocclass(). - * - * Input Parameters: - * class - A reference to the class instance to be freed. - * - * Returned Values: - * None - * - ****************************************************************************/ - -static inline void usbhost_freeclass(FAR struct usbhost_state_s *class) -{ - DEBUGASSERT(class != NULL); - - /* Free the class instance. */ - - uvdbg("Freeing: %p\n", class);; - kfree(class); -} - -/**************************************************************************** - * 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 = irqsave(); - for (devno = 0; devno < 26; devno++) - { - uint32_t bitno = 1 << devno; - if ((g_devinuse & bitno) == 0) - { - g_devinuse |= bitno; - priv->devchar = 'a' + devno; - irqrestore(flags); - return OK; - } - } - - irqrestore(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 = irqsave(); - g_devinuse &= ~(1 << devno); - irqrestore(flags); - } -} - -static inline void usbhost_mkdevname(FAR struct usbhost_state_s *priv, char *devname) -{ - (void)snprintf(devname, DEV_NAMELEN, DEV_FORMAT, priv->devchar); -} - -/**************************************************************************** - * Name: usbhost_destroy - * - * Description: - * The USB device has been disconnected and the refernce 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 Values: - * None - * - ****************************************************************************/ - -static void usbhost_destroy(FAR void *arg) -{ - FAR struct usbhost_state_s *priv = (FAR struct usbhost_state_s *)arg; - char devname[DEV_NAMELEN]; - - DEBUGASSERT(priv != NULL); - uvdbg("crefs: %d\n", priv->crefs); - - /* Unregister the driver */ - - uvdbg("Unregister driver\n"); - usbhost_mkdevname(priv, devname); - (void)unregister_driver(devname); - - /* Release the device name used by this connection */ - - usbhost_freedevno(priv); - - /* Free the interrupt endpoints */ - - if (priv->epin) - { - DRVR_EPFREE(priv->drvr, priv->epin); - } - - if (priv->epout) - { - DRVR_EPFREE(priv->drvr, priv->epout); - } - - /* Free any transfer buffers */ - - usbhost_tdfree(priv); - - /* Destroy the semaphores */ - - sem_destroy(&priv->exclsem); - sem_destroy(&priv->waitsem); - - /* Disconnect the USB host device */ - - DRVR_DISCONNECT(priv->drvr); - - /* 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_putbuffer - * - * Description: - * Add one character to the user buffer. - * - * Input Parameters: - * priv - Driver internal state - * keycode - The value to add to the user buffer - * - * Returned Values: - * None - * - ****************************************************************************/ - -static void usbhost_putbuffer(FAR struct usbhost_state_s *priv, - uint8_t keycode) -{ - register unsigned int head; - register unsigned int tail; - - /* Copy the next keyboard character into the user buffer. */ - - head = priv->headndx; - priv->kbdbuffer[head] = keycode; - - /* Increment the head index */ - - if (++head >= CONFIG_HIDKBD_BUFSIZE) - { - head = 0; - } - - /* If the buffer is full, then increment the tail index to make space. Is - * it better to lose old keystrokes or new? - */ - - tail = priv->tailndx; - if (tail == head) - { - if (++tail >= CONFIG_HIDKBD_BUFSIZE) - { - tail = 0; - } - - /* Save the updated tail index */ - - priv->tailndx = tail; - } - - /* Save the updated head index */ - - priv->headndx = head; -} - -/**************************************************************************** - * Name: usbhost_putstream - * - * Description: - * A wrapper for usbhost_putc that is compatibile with the lib_outstream_s - * putc methos. - * - * Input Parameters: - * stream - The struct lib_outstream_s reference - * ch - The character to add to the user buffer - * - * Returned Values: - * None - * - ****************************************************************************/ - -#ifdef CONFIG_HIDKBD_ENCODED -static void usbhost_putstream(FAR struct lib_outstream_s *stream, int ch) -{ - FAR struct usbhost_outstream_s *privstream = (FAR struct usbhost_outstream_s *)stream; - - DEBUGASSERT(privstream && privstream->priv); - usbhost_putbuffer(privstream->priv, (uint8_t)ch); - stream->nput++; -} -#endif - -/**************************************************************************** - * Name: usbhost_mapscancode - * - * Description: - * Map a keyboard scancode to a printable ASCII character. There is no - * support here for function keys or cursor controls in this version of - * the driver. - * - * Input Parameters: - * scancode - Scan code to be mapped. - * modifier - Ctrl,Alt,Shift,GUI modifier bits - * - * Returned Values: - * None - * - ****************************************************************************/ - -static inline uint8_t usbhost_mapscancode(uint8_t scancode, uint8_t modifier) -{ -#ifndef CONFIG_HIDKBD_RAWSCANCODES - /* Range check */ - - if (scancode >= USBHID_NUMSCANCODES) - { - return 0; - } - - /* Is either shift key pressed? */ - - if ((modifier & (USBHID_MODIFER_LSHIFT|USBHID_MODIFER_RSHIFT)) != 0) - { - return ucmap[scancode]; - } - else - { - return lcmap[scancode]; - } -#else - return scancode; -#endif -} - -/**************************************************************************** - * Name: usbhost_encodescancode - * - * Description: - * Check if the key has a special function encoding and, if it does, add - * the encoded value to the user buffer. - * - * Input Parameters: - * priv - Driver internal state - * scancode - Scan code to be mapped. - * modifier - Ctrl,Alt,Shift,GUI modifier bits - * - * Returned Values: - * None - * - ****************************************************************************/ - -#ifdef CONFIG_HIDKBD_ENCODED -static inline void usbhost_encodescancode(FAR struct usbhost_state_s *priv, - uint8_t scancode, uint8_t modifier) -{ - uint8_t encoded; - - /* Check if the raw scancode is in a valid range */ - - if (scancode >= FIRST_ENCODING && scancode <= LAST_ENCODING) - { - /* Yes the value is within range */ - - encoded = encoding[scancode - FIRST_ENCODING]; - ivdbg(" scancode: %02x modifier: %02x encoded: %d\n", - scancode, modifier, encoded); - - if (encoded) - { - struct usbhost_outstream_s usbstream; - - /* And it does correspond to a special function key */ - - usbstream.stream.put = usbhost_putstream; - usbstream.stream.nput = 0; - usbstream.priv = priv; - - /* Add the special function value to the user buffer */ - - kbd_specpress((enum kbd_keycode_e)encoded, - (FAR struct lib_outstream_s *)&usbstream); - } - } -} -#endif - -/**************************************************************************** - * Name: usbhost_kbdpoll - * - * Description: - * Periodically check for new keyboard data. - * - * Input Parameters: - * arg - A reference to the class instance to be destroyed. - * - * Returned Values: - * None - * - ****************************************************************************/ - -static int usbhost_kbdpoll(int argc, char *argv[]) -{ - FAR struct usbhost_state_s *priv; - FAR struct usb_ctrlreq_s *ctrlreq; -#ifndef CONFIG_HIDKBD_NODEBOUNCE - uint8_t lastkey[6] = {0, 0, 0, 0, 0, 0}; -#endif -#if defined(CONFIG_DEBUG_USB) && defined(CONFIG_DEBUG_VERBOSE) - unsigned int npolls = 0; -#endif - unsigned int nerrors = 0; - bool empty = true; - bool newstate; - int ret; - - uvdbg("Started\n"); - - /* 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 incremented here. Therefore, we know - * that the driver data structure will remain stable while this thread is - * running. - */ - - priv = g_priv; - DEBUGASSERT(priv != NULL); - - priv->polling = true; - priv->crefs++; - usbhost_givesem(&g_syncsem); - sleep(1); - - /* Loop here until the device is disconnected */ - - uvdbg("Entering poll loop\n"); - - while (!priv->disconnected) - { - /* 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_takesem(&priv->exclsem); - - /* Format the HID report request: - * - * bmRequestType 10100001 - * bRequest GET_REPORT (0x01) - * wValue Report Type and Report Index - * wIndex Interface Number - * wLength Descriptor Length - * Data Descriptor Data - */ - - ctrlreq = (struct usb_ctrlreq_s *)priv->tbuffer; - ctrlreq->type = USB_REQ_DIR_IN|USB_REQ_TYPE_CLASS|USB_REQ_RECIPIENT_INTERFACE; - ctrlreq->req = USBHID_REQUEST_GETREPORT; - - usbhost_putle16(ctrlreq->value, (USBHID_REPORTTYPE_INPUT << 8)); - usbhost_putle16(ctrlreq->index, priv->ifno); - usbhost_putle16(ctrlreq->len, sizeof(struct usbhid_kbdreport_s)); - - /* Send HID report request */ - - ret = DRVR_CTRLIN(priv->drvr, ctrlreq, priv->tbuffer); - usbhost_givesem(&priv->exclsem); - - /* Check for errors -- Bail if an excessive number of errors - * are encountered. - */ - - if (ret != OK) - { - nerrors++; - udbg("ERROR: GETREPORT/INPUT, DRVR_CTRLIN returned: %d/%d\n", - ret, nerrors); - - if (nerrors > 200) - { - udbg("Too many errors... aborting: %d\n", nerrors); - break; - } - } - - /* The report was received correctly. But ignore the keystrokes if no - * task has opened the driver. - */ - - else if (priv->open) - { - struct usbhid_kbdreport_s *rpt = (struct usbhid_kbdreport_s *)priv->tbuffer; - uint8_t keycode; - int i; - - /* Add the newly received keystrokes to our internal buffer */ - - usbhost_takesem(&priv->exclsem); - for (i = 0; i < 6; i++) - { - /* Is this key pressed? But not pressed last time? - * HID spec: "The order of keycodes in array fields has no - * significance. Order determination is done by the host - * software comparing the contents of the previous report to - * the current report. If two or more keys are reported in - * one report, their order is indeterminate. Keyboards may - * buffer events that would have otherwise resulted in - * multiple event in a single report. - * - * "'Repeat Rate' and 'Delay Before First Repeat' are - * implemented by the host and not in the keyboard (this - * means the BIOS in legacy mode). The host may use the - * device report rate and the number of reports to determine - * how long a key is being held down. Alternatively, the host - * may use its own clock or the idle request for the timing - * of these features." - */ - - if (rpt->key[i] != USBHID_KBDUSE_NONE -#ifndef CONFIG_HIDKBD_NODEBOUNCE - && rpt->key[i] != lastkey[i] -#endif - ) - { - /* Yes.. Add it to the buffer. */ - - /* Map the keyboard scancode to a printable ASCII - * character. There is no support here for function keys - * or cursor controls in this version of the driver. - */ - - keycode = usbhost_mapscancode(rpt->key[i], rpt->modifier); - ivdbg("Key %d: %02x keycode:%c modifier: %02x\n", - i, rpt->key[i], keycode ? keycode : ' ', rpt->modifier); - - /* Zero at this point means that the key does not map to a - * printable character. - */ - - if (keycode != 0) - { - /* Handle control characters. Zero after this means - * a valid, NUL character. - */ - - if ((rpt->modifier & (USBHID_MODIFER_LCTRL|USBHID_MODIFER_RCTRL)) != 0) - { - keycode &= 0x1f; - } - - /* Copy the next keyboard character into the user - * buffer. - */ - - usbhost_putbuffer(priv, keycode); - } - - /* The zero might, however, map to a special keyboard action (such as a - * cursor movement or function key). Attempt to encode the special key. - */ - -#ifdef CONFIG_HIDKBD_ENCODED - else - { - usbhost_encodescancode(priv, rpt->key[i], rpt->modifier); - } -#endif - } - - /* Save the scancode (or lack thereof) for key debouncing on - * next keyboard report. - */ - -#ifndef CONFIG_HIDKBD_NODEBOUNCE - lastkey[i] = rpt->key[i]; -#endif - } - - /* Is there data available? */ - - newstate = (priv->headndx == priv->tailndx); - if (!newstate) - { - /* Yes.. Is there a thread waiting for keyboard data now? */ - - if (priv->waiting) - { - /* Yes.. wake it up */ - - usbhost_givesem(&priv->waitsem); - priv->waiting = false; - } - - /* Did we just transition from no data available to data - * available? If so, wake up any threads waiting for the - * POLLIN event. - */ - - if (empty) - { - usbhost_pollnotify(priv); - } - } - - empty = newstate; - usbhost_givesem(&priv->exclsem); - } - - /* If USB debug is on, then provide some periodic indication that - * polling is still happening. - */ - -#if defined(CONFIG_DEBUG_USB) && defined(CONFIG_DEBUG_VERBOSE) - npolls++; - if ((npolls & 31) == 0) - { - udbg("Still polling: %d\n", npolls); - } -#endif - /* Wait for the required amount (or until a signal is received). We - * will wake up when either the delay elapses or we are signalled that - * the device has been disconnected. - */ - - usleep(CONFIG_HIDKBD_POLLUSEC); - } - - /* We get here when the driver is removed.. or when too many errors have - * been encountered. - * - * 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_takesem(&priv->exclsem); - - /* Indicate that we are no longer running and decrement the reference - * count help 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. - */ - - udbg("Keyboard removed, polling halted\n"); - priv->polling = false; - if (--priv->crefs < 2) - { - /* Destroy the instance (while we hold the semaphore!) */ - - usbhost_destroy(priv); - } - else - { - /* No, we will destroy the driver instance when it is finally closed */ - - usbhost_givesem(&priv->exclsem); - } - - return 0; -} - -/**************************************************************************** - * 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 descripor. - * desclen - The length in bytes of the configuration descriptor. - * funcaddr - The USB address of the function containing the endpoint that EP0 - * controls - * - * Returned Values: - * 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, - uint8_t funcaddr) -{ - 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 && - configdesc != NULL && - desclen >= sizeof(struct usb_cfgdesc_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: - { - FAR struct usb_ifdesc_s *ifdesc = (FAR struct usb_ifdesc_s *)configdesc; - - uvdbg("Interface descriptor\n"); - DEBUGASSERT(remaining >= USB_SIZEOF_IFDESC); - - /* Did we already find what we needed from a preceding interface? */ - - if ((found & USBHOST_RQDFOUND) == USBHOST_RQDFOUND) - { - /* Yes.. then break out of the loop and use the preceding - * interface. - */ - - done = true; - } - else - { - /* Otherwise, save the interface number and discard any - * endpoints previously found - */ - - priv->ifno = ifdesc->ifno; - found = USBHOST_IFFOUND; - } - } - break; - - /* HID descriptor */ - - case USBHID_DESCTYPE_HID: - uvdbg("HID descriptor\n"); - break; - - /* Endpoint descriptor. We expect one or two interrupt endpoints, - * a required IN endpoint and an optional OUT endpoint. - */ - - case USB_DESC_TYPE_ENDPOINT: - { - FAR struct usb_epdesc_s *epdesc = (FAR struct usb_epdesc_s *)configdesc; - - uvdbg("Endpoint descriptor\n"); - DEBUGASSERT(remaining >= USB_SIZEOF_EPDESC); - - /* Check for an 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 interrupt OUT endpoint. There not be more than 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 interrupt OUT endpoint information */ - - epoutdesc.addr = epdesc->addr & USB_EP_ADDR_NUMBER_MASK; - epoutdesc.in = false; - epoutdesc.funcaddr = funcaddr; - epoutdesc.xfrtype = USB_EP_ATTR_XFER_INT; - epoutdesc.interval = epdesc->interval; - epoutdesc.mxpacketsize = usbhost_getle16(epdesc->mxpacketsize); - uvdbg("Interrupt OUT EP addr:%d mxpacketsize:%d\n", - epoutdesc.addr, epoutdesc.mxpacketsize); - } - else - { - /* It is an interrupt IN endpoint. There should be only - * one interrupt IN endpoint. - */ - - if ((found & USBHOST_EPINFOUND) != 0) - { - /* Oops.. more than one endpint. We don't know what - * to do with this. - */ - - return -EINVAL; - } - found |= USBHOST_EPINFOUND; - - /* Save the interrupt IN endpoint information */ - - epindesc.addr = epdesc->addr & USB_EP_ADDR_NUMBER_MASK; - epindesc.in = 1; - epindesc.funcaddr = funcaddr; - epindesc.xfrtype = USB_EP_ATTR_XFER_INT; - epindesc.interval = epdesc->interval; - epindesc.mxpacketsize = usbhost_getle16(epdesc->mxpacketsize); - uvdbg("Interrupt IN EP addr:%d mxpacketsize:%d\n", - epindesc.addr, epindesc.mxpacketsize); - } - } - } - break; - - /* Other descriptors are just ignored for now */ - - default: - uvdbg("Other descriptor: %d\n", desc->type); - break; - } - - /* What we found everything that we are going to find? */ - - if (found == USBHOST_ALLFOUND) - { - /* Yes.. then break out of the loop and use the preceding interface */ - - 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_RQDFOUND) != USBHOST_RQDFOUND) - { - ulldbg("ERROR: Found IF:%s EPIN:%s\n", - (found & USBHOST_IFFOUND) != 0 ? "YES" : "NO", - (found & USBHOST_EPINFOUND) != 0 ? "YES" : "NO"); - return -EINVAL; - } - - /* We are good... Allocate the endpoints. First, the required interrupt - * IN endpoint. - */ - - ret = DRVR_EPALLOC(priv->drvr, &epindesc, &priv->epin); - if (ret != OK) - { - udbg("ERROR: Failed to allocate interrupt IN endpoint\n"); - return ret; - } - - /* Then the optional interrupt OUT endpoint */ - - ullvdbg("Found EPOOUT:%s\n", - (found & USBHOST_EPOUTFOUND) != 0 ? "YES" : "NO"); - - if ((found & USBHOST_EPOUTFOUND) != 0) - { - ret = DRVR_EPALLOC(priv->drvr, &epoutdesc, &priv->epout); - if (ret != OK) - { - udbg("ERROR: Failed to allocate interrupt OUT endpoint\n"); - (void)DRVR_EPFREE(priv->drvr, priv->epin); - return ret; - } - } - - ullvdbg("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 Values: - * None - * - ****************************************************************************/ - -static inline int usbhost_devinit(FAR struct usbhost_state_s *priv) -{ - char devname[DEV_NAMELEN]; - int ret; - - /* Set aside a transfer buffer for exclusive use by the keyboard class driver */ - - ret = usbhost_tdalloc(priv); - if (ret != OK) - { - udbg("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 used the - * 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_HIDKBD_STACKSIZE). - */ - - uvdbg("user_start: Start poll task\n"); - - /* The inputs to a task started by task_create() are very awkard for this - * purpose. They are really designed for command line tasks (argc/argv). So - * the following is kludge pass binary data when the keyboard 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). - */ - - usbhost_takesem(&g_exclsem); - g_priv = priv; - -#ifndef CONFIG_CUSTOM_STACK - priv->pollpid = task_create("usbhost", CONFIG_HIDKBD_DEFPRIO, - CONFIG_HIDKBD_STACKSIZE, - (main_t)usbhost_kbdpoll, (const char **)NULL); -#else - priv->pollpid = task_create("usbhost", CONFIG_HIDKBD_DEFPRIO, - (main_t)usbhost_kbdpoll, (const char **)NULL); -#endif - if (priv->pollpid == ERROR) - { - /* Failed to started the poll thread... probably due to memory resources */ - - usbhost_givesem(&g_exclsem); - ret = -ENOMEM; - goto errout; - } - - /* Now wait for the poll task to get properly initialized */ - - usbhost_takesem(&g_syncsem); - usbhost_givesem(&g_exclsem); - - /* Register the driver */ - - uvdbg("Register driver\n"); - usbhost_mkdevname(priv, devname); - ret = register_driver(devname, &usbhost_fops, 0666, priv); - - /* We now have to be concerned about asynchronous modification of crefs - * because the driver has been registerd. - */ - -errout: - usbhost_takesem(&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 Values: - * 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 Values: - * 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 Values: - * 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 Values: - * 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_tdalloc - * - * Description: - * Allocate transfer buffer memory. - * - * Input Parameters: - * priv - A reference to the class instance. - * - * Returned Values: - * On sucess, zero (OK) is returned. On failure, an negated errno value - * is returned to indicate the nature of the failure. - * - ****************************************************************************/ - -static inline int usbhost_tdalloc(FAR struct usbhost_state_s *priv) -{ - DEBUGASSERT(priv && priv->tbuffer == NULL); - return DRVR_ALLOC(priv->drvr, &priv->tbuffer, &priv->tbuflen); -} - -/**************************************************************************** - * Name: usbhost_tdfree - * - * Description: - * Free transfer buffer memory. - * - * Input Parameters: - * priv - A reference to the class instance. - * - * Returned Values: - * On sucess, zero (OK) is returned. On failure, an negated errno value - * is returned to indicate the nature of the failure. - * - ****************************************************************************/ - -static inline int usbhost_tdfree(FAR struct usbhost_state_s *priv) -{ - int result = OK; - DEBUGASSERT(priv); - - if (priv->tbuffer) - { - DEBUGASSERT(priv->drvr); - result = DRVR_FREE(priv->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: - * drvr - An instance of struct usbhost_driver_s that the class - * implementation will "bind" to its state structure and will - * subsequently use to communicate with the USB host driver. - * id - In the case where the device supports multiple base classes, - * subclasses, or protocols, this specifies which to configure for. - * - * Returned Values: - * 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 drvr 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_driver_s *drvr, - 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->class.connect = usbhost_connect; - priv->class.disconnected = usbhost_disconnected; - - /* The initial reference count is 1... One reference is held by the driver */ - - priv->crefs = 1; - - /* Initialize semaphores */ - - sem_init(&priv->exclsem, 0, 1); - sem_init(&priv->waitsem, 0, 0); - - /* Bind the driver to the storage class instance */ - - priv->drvr = drvr; - - /* Return the instance of the USB keyboard class driver */ - - return &priv->class; - } - } - - /* 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: - * class - The USB host class entry previously obtained from a call to create(). - * configdesc - A pointer to a uint8_t buffer container the configuration descripor. - * desclen - The length in bytes of the configuration descriptor. - * funcaddr - The USB address of the function containing the endpoint that EP0 - * controls - * - * Returned Values: - * 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 *class, - FAR const uint8_t *configdesc, int desclen, - uint8_t funcaddr) -{ - FAR struct usbhost_state_s *priv = (FAR struct usbhost_state_s *)class; - 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, funcaddr); - if (ret != OK) - { - udbg("usbhost_cfgdesc() failed: %d\n", ret); - } - else - { - /* Now configure the device and register the NuttX driver */ - - ret = usbhost_devinit(priv); - if (ret != OK) - { - udbg("usbhost_devinit() failed: %d\n", ret); - } - } - - /* ERROR handling: Do nothing. If we return and error during connection, - * the driver is required to call the DISCONNECT method. Possibilities: - * - * - Failure occurred before the kbdpoll task was started successfully. - * In this case, the disconnection will have to be handled on the worker - * task. - * - Failure occured after the kbdpoll task was started succesffuly. In - * this case, the disconnetion can be performed on the kbdpoll thread. - */ - - 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: - * class - The USB host class entry previously obtained from a call to - * create(). - * - * Returned Values: - * 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 *class) -{ - FAR struct usbhost_state_s *priv = (FAR struct usbhost_state_s *)class; - - DEBUGASSERT(priv != NULL); - - /* Set an indication to any users of the keyboard device that the device - * is no longer available. - */ - - priv->disconnected = true; - ullvdbg("Disconnected\n"); - - /* Is there a thread waiting for keyboard data that will never come? */ - - if (priv->waiting) - { - /* Yes.. wake it up */ - - usbhost_givesem(&priv->waitsem); - priv->waiting = false; - } - - /* Possibilities: - * - * - Failure occurred before the kbdpoll task was started successfully. - * In this case, the disconnection will have to be handled on the worker - * task. - * - Failure occured after the kbdpoll task was started succesffuly. In - * this case, the disconnetion can be performed on the kbdpoll thread. - */ - - if (priv->polling) - { - /* The polling task is still alive. Signal the keyboard polling task. - * When that task wakes up, it will decrement the reference count and, - * perhaps, destroy the class instance. Then it will exit. - */ - - (void)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); - (void)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; - - uvdbg("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); - usbhost_takesem(&priv->exclsem); - - /* Check if the keyboard device is still connected. We need to disable - * interrupts momentarily to assure that there are no asynchronous disconnect - * events. - */ - - flags = irqsave(); - 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 - { - /* Otherwise, just increment the reference count on the driver */ - - priv->crefs++; - priv->open = true; - ret = OK; - } - irqrestore(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; - - uvdbg("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); - usbhost_takesem(&priv->exclsem); - priv->crefs--; - - /* Is this the last reference (other than the one held by the USB host - * controller driver) - */ - - if (priv->crefs <= 1) - { - irqstate_t flags; - - /* Yes.. then the driver is no longer open */ - - priv->open = false; - priv->headndx = 0; - priv->tailndx = 0; - - /* We need to disable interrupts momentarily to assure that there are - * no asynchronous disconnect events. - */ - - flags = irqsave(); - - /* Check if the USB keyboard device is still connected. If the device is - * no longer connected, then unregister the driver and free the driver - * class instance. - */ - - if (priv->disconnected) - { - /* Destroy the class instance (we can't use priv after this; we can't - * 'give' the semapore) - */ - - usbhost_destroy(priv); - irqrestore(flags); - return OK; - } - irqrestore(flags); - } - - usbhost_givesem(&priv->exclsem); - 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; - size_t nbytes; - unsigned int tail; - int ret; - - uvdbg("Entry\n"); - 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); - usbhost_takesem(&priv->exclsem); - - /* Check if the keyboard 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 keybaord is no longer connected. Refuse any further attempts - * to access the driver. - */ - - ret = -ENODEV; - } - else - { - /* Is there keyboard data now? */ - - while (priv->tailndx == priv->headndx) - { - /* No.. were we open non-blocking? */ - - if (filep->f_oflags & O_NONBLOCK) - { - /* Yes.. then return a failure */ - - ret = -EAGAIN; - goto errout; - } - - /* Wait for data to be available */ - - uvdbg("Waiting...\n"); - - priv->waiting = true; - usbhost_givesem(&priv->exclsem); - usbhost_takesem(&priv->waitsem); - usbhost_takesem(&priv->exclsem); - - /* Did the keyboard become disconnected while we were waiting */ - - if (priv->disconnected) - { - ret = -ENODEV; - goto errout; - } - } - - /* Read data from our internal buffer of received characters */ - - for (tail = priv->tailndx, nbytes = 0; - tail != priv->headndx && nbytes < len; - nbytes++) - { - /* Copy the next keyboard character into the user buffer */ - - *buffer++ = priv->kbdbuffer[tail]; - - /* Handle wrap-around of the tail index */ - - if (++tail >= CONFIG_HIDKBD_BUFSIZE) - { - tail = 0; - } - } - ret = nbytes; - - /* Update the tail index (pehaps marking the buffer empty) */ - - priv->tailndx = tail; - } - -errout: - usbhost_givesem(&priv->exclsem); - 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) -{ - /* We won't try to write to the keyboard */ - - return -ENOSYS; -} - -/**************************************************************************** - * Name: usbhost_poll - * - * Description: - * Standard character driver poll method. - * - ****************************************************************************/ - -#ifndef CONFIG_DISABLE_POLL -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 = OK; - int i; - - uvdbg("Entry\n"); - 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); - usbhost_takesem(&priv->exclsem); - - /* Check if the keyboard 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 keybaord 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 availableslot for - * the poll structure reference - */ - - for (i = 0; i < CONFIG_HIDKBD_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_HIDKBD_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 keyboard data. - */ - - if (priv->headndx != priv->tailndx) - { - 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: - sem_post(&priv->exclsem); - return ret; -} -#endif - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: usbhost_kbdinit - * - * Description: - * Initialize the USB storage HID keyboard class driver. This function - * should be called be platform-specific code in order to initialize and - * register support for the USB host HID keyboard class device. - * - * Input Parameters: - * None - * - * Returned Values: - * On success this function will return zero (OK); A negated errno value - * will be returned on failure. - * - ****************************************************************************/ - -int usbhost_kbdinit(void) -{ - /* Perform any one-time initialization of the class implementation */ - - sem_init(&g_exclsem, 0, 1); - sem_init(&g_syncsem, 0, 0); - - /* Advertise our availability to support (certain) devices */ - - return usbhost_registerclass(&g_skeleton); -} - -#endif /* CONFIG_USBHOST)&& !CONFIG_USBHOST_INT_DISABLE && CONFIG_NFILE_DESCRIPTORS */ - - |