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#ifndef __LINUX_USB_H
#define __LINUX_USB_H
/* USB constants */
/*
* Device and/or Interface Class codes
*/
#define USB_CLASS_PER_INTERFACE 0 /* for DeviceClass */
#define USB_CLASS_AUDIO 1
#define USB_CLASS_COMM 2
#define USB_CLASS_HID 3
#define USB_CLASS_PHYSICAL 5
#define USB_CLASS_STILL_IMAGE 6
#define USB_CLASS_PRINTER 7
#define USB_CLASS_MASS_STORAGE 8
#define USB_CLASS_HUB 9
#define USB_CLASS_CDC_DATA 0x0a
#define USB_CLASS_CSCID 0x0b /* chip+ smart card */
#define USB_CLASS_CONTENT_SEC 0x0d /* content security */
#define USB_CLASS_APP_SPEC 0xfe
#define USB_CLASS_VENDOR_SPEC 0xff
/*
* USB types
*/
#define USB_TYPE_MASK (0x03 << 5)
#define USB_TYPE_STANDARD (0x00 << 5)
#define USB_TYPE_CLASS (0x01 << 5)
#define USB_TYPE_VENDOR (0x02 << 5)
#define USB_TYPE_RESERVED (0x03 << 5)
/*
* USB recipients
*/
#define USB_RECIP_MASK 0x1f
#define USB_RECIP_DEVICE 0x00
#define USB_RECIP_INTERFACE 0x01
#define USB_RECIP_ENDPOINT 0x02
#define USB_RECIP_OTHER 0x03
/*
* USB directions
*/
#define USB_DIR_OUT 0
#define USB_DIR_IN 0x80
/*
* Descriptor types
*/
#define USB_DT_DEVICE 0x01
#define USB_DT_CONFIG 0x02
#define USB_DT_STRING 0x03
#define USB_DT_INTERFACE 0x04
#define USB_DT_ENDPOINT 0x05
#define USB_DT_HID (USB_TYPE_CLASS | 0x01)
#define USB_DT_REPORT (USB_TYPE_CLASS | 0x02)
#define USB_DT_PHYSICAL (USB_TYPE_CLASS | 0x03)
#define USB_DT_HUB (USB_TYPE_CLASS | 0x09)
/*
* Descriptor sizes per descriptor type
*/
#define USB_DT_DEVICE_SIZE 18
#define USB_DT_CONFIG_SIZE 9
#define USB_DT_INTERFACE_SIZE 9
#define USB_DT_ENDPOINT_SIZE 7
#define USB_DT_ENDPOINT_AUDIO_SIZE 9 /* Audio extension */
#define USB_DT_HUB_NONVAR_SIZE 7
#define USB_DT_HID_SIZE 9
/*
* Endpoints
*/
#define USB_ENDPOINT_NUMBER_MASK 0x0f /* in bEndpointAddress */
#define USB_ENDPOINT_DIR_MASK 0x80
#define USB_ENDPOINT_XFERTYPE_MASK 0x03 /* in bmAttributes */
#define USB_ENDPOINT_XFER_CONTROL 0
#define USB_ENDPOINT_XFER_ISOC 1
#define USB_ENDPOINT_XFER_BULK 2
#define USB_ENDPOINT_XFER_INT 3
/*
* USB Packet IDs (PIDs)
*/
#define USB_PID_UNDEF_0 0xf0
#define USB_PID_OUT 0xe1
#define USB_PID_ACK 0xd2
#define USB_PID_DATA0 0xc3
#define USB_PID_PING 0xb4 /* USB 2.0 */
#define USB_PID_SOF 0xa5
#define USB_PID_NYET 0x96 /* USB 2.0 */
#define USB_PID_DATA2 0x87 /* USB 2.0 */
#define USB_PID_SPLIT 0x78 /* USB 2.0 */
#define USB_PID_IN 0x69
#define USB_PID_NAK 0x5a
#define USB_PID_DATA1 0x4b
#define USB_PID_PREAMBLE 0x3c /* Token mode */
#define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */
#define USB_PID_SETUP 0x2d
#define USB_PID_STALL 0x1e
#define USB_PID_MDATA 0x0f /* USB 2.0 */
/*
* Standard requests
*/
#define USB_REQ_GET_STATUS 0x00
#define USB_REQ_CLEAR_FEATURE 0x01
#define USB_REQ_SET_FEATURE 0x03
#define USB_REQ_SET_ADDRESS 0x05
#define USB_REQ_GET_DESCRIPTOR 0x06
#define USB_REQ_SET_DESCRIPTOR 0x07
#define USB_REQ_GET_CONFIGURATION 0x08
#define USB_REQ_SET_CONFIGURATION 0x09
#define USB_REQ_GET_INTERFACE 0x0A
#define USB_REQ_SET_INTERFACE 0x0B
#define USB_REQ_SYNCH_FRAME 0x0C
/*
* HID requests
*/
#define USB_REQ_GET_REPORT 0x01
#define USB_REQ_GET_IDLE 0x02
#define USB_REQ_GET_PROTOCOL 0x03
#define USB_REQ_SET_REPORT 0x09
#define USB_REQ_SET_IDLE 0x0A
#define USB_REQ_SET_PROTOCOL 0x0B
#ifdef __KERNEL__
#include <linux/types.h>
#include <linux/ioctl.h>
#include <linux/version.h>
#include <linux/sched.h>
#include <linux/delay.h>
#include <linux/interrupt.h> /* for in_interrupt() */
#include <linux/config.h>
#include <linux/list.h>
#define USB_MAJOR 180
static __inline__ void wait_ms(unsigned int ms)
{
if(!in_interrupt()) {
current->state = TASK_UNINTERRUPTIBLE;
schedule_timeout(1 + ms * HZ / 1000);
}
else
mdelay(ms);
}
typedef struct {
__u8 requesttype;
__u8 request;
__u16 value;
__u16 index;
__u16 length;
} devrequest __attribute__ ((packed));
/*
* USB-status codes:
* USB_ST* maps to -E* and should go away in the future
*/
#define USB_ST_NOERROR 0
#define USB_ST_CRC (-EILSEQ)
#define USB_ST_BITSTUFF (-EPROTO)
#define USB_ST_NORESPONSE (-ETIMEDOUT) /* device not responding/handshaking */
#define USB_ST_DATAOVERRUN (-EOVERFLOW)
#define USB_ST_DATAUNDERRUN (-EREMOTEIO)
#define USB_ST_BUFFEROVERRUN (-ECOMM)
#define USB_ST_BUFFERUNDERRUN (-ENOSR)
#define USB_ST_INTERNALERROR (-EPROTO) /* unknown error */
#define USB_ST_SHORT_PACKET (-EREMOTEIO)
#define USB_ST_PARTIAL_ERROR (-EXDEV) /* ISO transfer only partially completed */
#define USB_ST_URB_KILLED (-ENOENT) /* URB canceled by user */
#define USB_ST_URB_PENDING (-EINPROGRESS)
#define USB_ST_REMOVED (-ENODEV) /* device not existing or removed */
#define USB_ST_TIMEOUT (-ETIMEDOUT) /* communication timed out, also in urb->status**/
#define USB_ST_NOTSUPPORTED (-ENOSYS)
#define USB_ST_BANDWIDTH_ERROR (-ENOSPC) /* too much bandwidth used */
#define USB_ST_URB_INVALID_ERROR (-EINVAL) /* invalid value/transfer type */
#define USB_ST_URB_REQUEST_ERROR (-ENXIO) /* invalid endpoint */
#define USB_ST_STALL (-EPIPE) /* pipe stalled, also in urb->status*/
/*
* USB device number allocation bitmap. There's one bitmap
* per USB tree.
*/
struct usb_devmap {
unsigned long devicemap[128 / (8*sizeof(unsigned long))];
};
#define USB_MAXBUS 64
struct usb_busmap {
unsigned long busmap[USB_MAXBUS / (8*sizeof(unsigned long))];
};
/*
* This is a USB device descriptor.
*
* USB device information
*/
/* Everything but the endpoint maximums are aribtrary */
#define USB_MAXCONFIG 8
#define USB_ALTSETTINGALLOC 4
#define USB_MAXALTSETTING 128 /* Hard limit */
#define USB_MAXINTERFACES 32
#define USB_MAXENDPOINTS 32
/* All standard descriptors have these 2 fields in common */
struct usb_descriptor_header {
__u8 bLength;
__u8 bDescriptorType;
} __attribute__ ((packed));
/* Device descriptor */
struct usb_device_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u16 bcdUSB;
__u8 bDeviceClass;
__u8 bDeviceSubClass;
__u8 bDeviceProtocol;
__u8 bMaxPacketSize0;
__u16 idVendor;
__u16 idProduct;
__u16 bcdDevice;
__u8 iManufacturer;
__u8 iProduct;
__u8 iSerialNumber;
__u8 bNumConfigurations;
} __attribute__ ((packed));
/* Endpoint descriptor */
struct usb_endpoint_descriptor {
__u8 bLength __attribute__ ((packed));
__u8 bDescriptorType __attribute__ ((packed));
__u8 bEndpointAddress __attribute__ ((packed));
__u8 bmAttributes __attribute__ ((packed));
__u16 wMaxPacketSize __attribute__ ((packed));
__u8 bInterval __attribute__ ((packed));
__u8 bRefresh __attribute__ ((packed));
__u8 bSynchAddress __attribute__ ((packed));
unsigned char *extra; /* Extra descriptors */
int extralen;
};
/* Interface descriptor */
struct usb_interface_descriptor {
__u8 bLength __attribute__ ((packed));
__u8 bDescriptorType __attribute__ ((packed));
__u8 bInterfaceNumber __attribute__ ((packed));
__u8 bAlternateSetting __attribute__ ((packed));
__u8 bNumEndpoints __attribute__ ((packed));
__u8 bInterfaceClass __attribute__ ((packed));
__u8 bInterfaceSubClass __attribute__ ((packed));
__u8 bInterfaceProtocol __attribute__ ((packed));
__u8 iInterface __attribute__ ((packed));
struct usb_endpoint_descriptor *endpoint;
unsigned char *extra; /* Extra descriptors */
int extralen;
};
struct usb_interface {
struct usb_interface_descriptor *altsetting;
int act_altsetting; /* active alternate setting */
int num_altsetting; /* number of alternate settings */
int max_altsetting; /* total memory allocated */
struct usb_driver *driver; /* driver */
void *private_data;
};
/* Configuration descriptor information.. */
struct usb_config_descriptor {
__u8 bLength __attribute__ ((packed));
__u8 bDescriptorType __attribute__ ((packed));
__u16 wTotalLength __attribute__ ((packed));
__u8 bNumInterfaces __attribute__ ((packed));
__u8 bConfigurationValue __attribute__ ((packed));
__u8 iConfiguration __attribute__ ((packed));
__u8 bmAttributes __attribute__ ((packed));
__u8 MaxPower __attribute__ ((packed));
struct usb_interface *interface;
unsigned char *extra; /* Extra descriptors */
int extralen;
};
/* String descriptor */
struct usb_string_descriptor {
__u8 bLength;
__u8 bDescriptorType;
__u16 wData[1];
} __attribute__ ((packed));
struct usb_device;
/*
* Device table entry for "new style" table-driven USB drivers.
* User mode code can read these tables to choose which modules to load.
* Declare the table as __devinitdata, and as a MODULE_DEVICE_TABLE.
*
* With a device table provide bind() instead of probe(). Then the
* third bind() parameter will point to a matching entry from this
* table. (Null value reserved.)
*
* Terminate the driver's table with an all-zeroes entry.
* Init the fields you care about; zeroes are not used in comparisons.
*/
#define USB_DEVICE_ID_MATCH_VENDOR 0x0001
#define USB_DEVICE_ID_MATCH_PRODUCT 0x0002
#define USB_DEVICE_ID_MATCH_DEV_LO 0x0004
#define USB_DEVICE_ID_MATCH_DEV_HI 0x0008
#define USB_DEVICE_ID_MATCH_DEV_CLASS 0x0010
#define USB_DEVICE_ID_MATCH_DEV_SUBCLASS 0x0020
#define USB_DEVICE_ID_MATCH_DEV_PROTOCOL 0x0040
#define USB_DEVICE_ID_MATCH_INT_CLASS 0x0080
#define USB_DEVICE_ID_MATCH_INT_SUBCLASS 0x0100
#define USB_DEVICE_ID_MATCH_INT_PROTOCOL 0x0200
#define USB_DEVICE_ID_MATCH_DEVICE (USB_DEVICE_ID_MATCH_VENDOR | USB_DEVICE_ID_MATCH_PRODUCT)
#define USB_DEVICE_ID_MATCH_DEV_RANGE (USB_DEVICE_ID_MATCH_DEV_LO | USB_DEVICE_ID_MATCH_DEV_HI)
#define USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION (USB_DEVICE_ID_MATCH_DEVICE | USB_DEVICE_ID_MATCH_DEV_RANGE)
#define USB_DEVICE_ID_MATCH_DEV_INFO \
(USB_DEVICE_ID_MATCH_DEV_CLASS | USB_DEVICE_ID_MATCH_DEV_SUBCLASS | USB_DEVICE_ID_MATCH_DEV_PROTOCOL)
#define USB_DEVICE_ID_MATCH_INT_INFO \
(USB_DEVICE_ID_MATCH_INT_CLASS | USB_DEVICE_ID_MATCH_INT_SUBCLASS | USB_DEVICE_ID_MATCH_INT_PROTOCOL)
/* Some useful macros */
#define USB_DEVICE(vend,prod) \
match_flags: USB_DEVICE_ID_MATCH_DEVICE, idVendor: (vend), idProduct: (prod)
#define USB_DEVICE_VER(vend,prod,lo,hi) \
match_flags: USB_DEVICE_ID_MATCH_DEVICE_AND_VERSION, idVendor: (vend), idProduct: (prod), bcdDevice_lo: (lo), bcdDevice_hi: (hi)
#define USB_DEVICE_INFO(cl,sc,pr) \
match_flags: USB_DEVICE_ID_MATCH_DEV_INFO, bDeviceClass: (cl), bDeviceSubClass: (sc), bDeviceProtocol: (pr)
#define USB_INTERFACE_INFO(cl,sc,pr) \
match_flags: USB_DEVICE_ID_MATCH_INT_INFO, bInterfaceClass: (cl), bInterfaceSubClass: (sc), bInterfaceProtocol: (pr)
struct usb_device_id {
/* This bitmask is used to determine which of the following fields
* are to be used for matching.
*/
__u16 match_flags;
/*
* vendor/product codes are checked, if vendor is nonzero
* Range is for device revision (bcdDevice), inclusive;
* zero values here mean range isn't considered
*/
__u16 idVendor;
__u16 idProduct;
__u16 bcdDevice_lo, bcdDevice_hi;
/*
* if device class != 0, these can be match criteria;
* but only if this bDeviceClass value is nonzero
*/
__u8 bDeviceClass;
__u8 bDeviceSubClass;
__u8 bDeviceProtocol;
/*
* if interface class != 0, these can be match criteria;
* but only if this bInterfaceClass value is nonzero
*/
__u8 bInterfaceClass;
__u8 bInterfaceSubClass;
__u8 bInterfaceProtocol;
/*
* for driver's use; not involved in driver matching.
*/
unsigned long driver_info;
};
struct usb_driver {
const char *name;
void *(*probe)(
struct usb_device *dev, /* the device */
unsigned intf, /* what interface */
const struct usb_device_id *id /* from id_table */
);
void (*disconnect)(struct usb_device *, void *);
struct list_head driver_list;
struct file_operations *fops;
int minor;
struct semaphore serialize;
/* ioctl -- userspace apps can talk to drivers through usbdevfs */
int (*ioctl)(struct usb_device *dev, unsigned int code, void *buf);
/* support for "new-style" USB hotplugging
* binding policy can be driven from user mode too
*/
const struct usb_device_id *id_table;
/* suspend before the bus suspends;
* disconnect or resume when the bus resumes */
// void (*suspend)(struct usb_device *dev);
// void (*resume)(struct usb_device *dev);
};
/*----------------------------------------------------------------------------*
* New USB Structures *
*----------------------------------------------------------------------------*/
/*
* urb->transfer_flags:
*/
#define USB_DISABLE_SPD 0x0001
#define USB_ISO_ASAP 0x0002
#define USB_ASYNC_UNLINK 0x0008
#define USB_QUEUE_BULK 0x0010
#define USB_NO_FSBR 0x0020
#define USB_ZERO_PACKET 0x0040 // Finish bulk OUTs always with zero length packet
#define URB_NO_INTERRUPT 0x0080 /* HINT: no non-error interrupt needed */
/* ... less overhead for QUEUE_BULK */
#define USB_TIMEOUT_KILLED 0x1000 // only set by HCD!
typedef struct
{
unsigned int offset;
unsigned int length; // expected length
unsigned int actual_length;
unsigned int status;
} iso_packet_descriptor_t, *piso_packet_descriptor_t;
struct urb;
typedef void (*usb_complete_t)(struct urb *);
typedef struct urb
{
spinlock_t lock; // lock for the URB
void *hcpriv; // private data for host controller
struct list_head urb_list; // list pointer to all active urbs
struct urb *next; // pointer to next URB
struct usb_device *dev; // pointer to associated USB device
unsigned int pipe; // pipe information
int status; // returned status
unsigned int transfer_flags; // USB_DISABLE_SPD | USB_ISO_ASAP | etc.
void *transfer_buffer; // associated data buffer
int transfer_buffer_length; // data buffer length
int actual_length; // actual data buffer length
int bandwidth; // bandwidth for this transfer request (INT or ISO)
unsigned char *setup_packet; // setup packet (control only)
//
int start_frame; // start frame (iso/irq only)
int number_of_packets; // number of packets in this request (iso)
int interval; // polling interval (irq only)
int error_count; // number of errors in this transfer (iso only)
int timeout; // timeout (in jiffies)
//
void *context; // context for completion routine
usb_complete_t complete; // pointer to completion routine
//
iso_packet_descriptor_t iso_frame_desc[0];
} urb_t, *purb_t;
/**
* FILL_CONTROL_URB - macro to help initialize a control urb
* @URB: pointer to the urb to initialize.
* @DEV: pointer to the struct usb_device for this urb.
* @PIPE: the endpoint pipe
* @SETUP_PACKET: pointer to the setup_packet buffer
* @TRANSFER_BUFFER: pointer to the transfer buffer
* @BUFFER_LENGTH: length of the transfer buffer
* @COMPLETE: pointer to the usb_complete_t function
* @CONTEXT: what to set the urb context to.
*
* Initializes a control urb with the proper information needed to submit
* it to a device. This macro is depreciated, the usb_fill_control_urb()
* function should be used instead.
*/
#define FILL_CONTROL_URB(URB,DEV,PIPE,SETUP_PACKET,TRANSFER_BUFFER,BUFFER_LENGTH,COMPLETE,CONTEXT) \
do {\
spin_lock_init(&(URB)->lock);\
(URB)->dev=DEV;\
(URB)->pipe=PIPE;\
(URB)->setup_packet=SETUP_PACKET;\
(URB)->transfer_buffer=TRANSFER_BUFFER;\
(URB)->transfer_buffer_length=BUFFER_LENGTH;\
(URB)->complete=COMPLETE;\
(URB)->context=CONTEXT;\
} while (0)
/**
* FILL_BULK_URB - macro to help initialize a bulk urb
* @URB: pointer to the urb to initialize.
* @DEV: pointer to the struct usb_device for this urb.
* @PIPE: the endpoint pipe
* @TRANSFER_BUFFER: pointer to the transfer buffer
* @BUFFER_LENGTH: length of the transfer buffer
* @COMPLETE: pointer to the usb_complete_t function
* @CONTEXT: what to set the urb context to.
*
* Initializes a bulk urb with the proper information needed to submit it
* to a device. This macro is depreciated, the usb_fill_bulk_urb()
* function should be used instead.
*/
#define FILL_BULK_URB(URB,DEV,PIPE,TRANSFER_BUFFER,BUFFER_LENGTH,COMPLETE,CONTEXT) \
do {\
spin_lock_init(&(URB)->lock);\
(URB)->dev=DEV;\
(URB)->pipe=PIPE;\
(URB)->transfer_buffer=TRANSFER_BUFFER;\
(URB)->transfer_buffer_length=BUFFER_LENGTH;\
(URB)->complete=COMPLETE;\
(URB)->context=CONTEXT;\
} while (0)
/**
* FILL_INT_URB - macro to help initialize a interrupt urb
* @URB: pointer to the urb to initialize.
* @DEV: pointer to the struct usb_device for this urb.
* @PIPE: the endpoint pipe
* @TRANSFER_BUFFER: pointer to the transfer buffer
* @BUFFER_LENGTH: length of the transfer buffer
* @COMPLETE: pointer to the usb_complete_t function
* @CONTEXT: what to set the urb context to.
* @INTERVAL: what to set the urb interval to.
*
* Initializes a interrupt urb with the proper information needed to submit
* it to a device. This macro is depreciated, the usb_fill_int_urb()
* function should be used instead.
*/
#define FILL_INT_URB(URB,DEV,PIPE,TRANSFER_BUFFER,BUFFER_LENGTH,COMPLETE,CONTEXT,INTERVAL) \
do {\
spin_lock_init(&(URB)->lock);\
(URB)->dev=DEV;\
(URB)->pipe=PIPE;\
(URB)->transfer_buffer=TRANSFER_BUFFER;\
(URB)->transfer_buffer_length=BUFFER_LENGTH;\
(URB)->complete=COMPLETE;\
(URB)->context=CONTEXT;\
(URB)->interval=INTERVAL;\
(URB)->start_frame=-1;\
} while (0)
#define FILL_CONTROL_URB_TO(a,aa,b,c,d,e,f,g,h) \
do {\
spin_lock_init(&(a)->lock);\
(a)->dev=aa;\
(a)->pipe=b;\
(a)->setup_packet=c;\
(a)->transfer_buffer=d;\
(a)->transfer_buffer_length=e;\
(a)->complete=f;\
(a)->context=g;\
(a)->timeout=h;\
} while (0)
#define FILL_BULK_URB_TO(a,aa,b,c,d,e,f,g) \
do {\
spin_lock_init(&(a)->lock);\
(a)->dev=aa;\
(a)->pipe=b;\
(a)->transfer_buffer=c;\
(a)->transfer_buffer_length=d;\
(a)->complete=e;\
(a)->context=f;\
(a)->timeout=g;\
} while (0)
/**
* usb_fill_control_urb - initializes a control urb
* @urb: pointer to the urb to initialize.
* @dev: pointer to the struct usb_device for this urb.
* @pipe: the endpoint pipe
* @setup_packet: pointer to the setup_packet buffer
* @transfer_buffer: pointer to the transfer buffer
* @buffer_length: length of the transfer buffer
* @complete: pointer to the usb_complete_t function
* @context: what to set the urb context to.
*
* Initializes a control urb with the proper information needed to submit
* it to a device.
*/
static inline void usb_fill_control_urb (struct urb *urb,
struct usb_device *dev,
unsigned int pipe,
unsigned char *setup_packet,
void *transfer_buffer,
int buffer_length,
usb_complete_t complete,
void *context)
{
spin_lock_init(&urb->lock);
urb->dev = dev;
urb->pipe = pipe;
urb->setup_packet = setup_packet;
urb->transfer_buffer = transfer_buffer;
urb->transfer_buffer_length = buffer_length;
urb->complete = complete;
urb->context = context;
}
/**
* usb_fill_bulk_urb - macro to help initialize a bulk urb
* @urb: pointer to the urb to initialize.
* @dev: pointer to the struct usb_device for this urb.
* @pipe: the endpoint pipe
* @transfer_buffer: pointer to the transfer buffer
* @buffer_length: length of the transfer buffer
* @complete: pointer to the usb_complete_t function
* @context: what to set the urb context to.
*
* Initializes a bulk urb with the proper information needed to submit it
* to a device.
*/
static inline void usb_fill_bulk_urb (struct urb *urb,
struct usb_device *dev,
unsigned int pipe,
void *transfer_buffer,
int buffer_length,
usb_complete_t complete,
void *context)
{
spin_lock_init(&urb->lock);
urb->dev = dev;
urb->pipe = pipe;
urb->transfer_buffer = transfer_buffer;
urb->transfer_buffer_length = buffer_length;
urb->complete = complete;
urb->context = context;
}
/**
* usb_fill_int_urb - macro to help initialize a interrupt urb
* @urb: pointer to the urb to initialize.
* @dev: pointer to the struct usb_device for this urb.
* @pipe: the endpoint pipe
* @transfer_buffer: pointer to the transfer buffer
* @buffer_length: length of the transfer buffer
* @complete: pointer to the usb_complete_t function
* @context: what to set the urb context to.
* @interval: what to set the urb interval to.
*
* Initializes a interrupt urb with the proper information needed to submit
* it to a device.
*/
static inline void usb_fill_int_urb (struct urb *urb,
struct usb_device *dev,
unsigned int pipe,
void *transfer_buffer,
int buffer_length,
usb_complete_t complete,
void *context,
int interval)
{
spin_lock_init(&urb->lock);
urb->dev = dev;
urb->pipe = pipe;
urb->transfer_buffer = transfer_buffer;
urb->transfer_buffer_length = buffer_length;
urb->complete = complete;
urb->context = context;
urb->interval = interval;
urb->start_frame = -1;
}
purb_t usb_alloc_urb(int iso_packets);
void usb_free_urb (purb_t purb);
int usb_submit_urb(purb_t purb);
int usb_unlink_urb(purb_t purb);
int usb_internal_control_msg(struct usb_device *usb_dev, unsigned int pipe, devrequest *cmd, void *data, int len, int timeout);
int usb_bulk_msg(struct usb_device *usb_dev, unsigned int pipe, void *data, int len, int *actual_length, int timeout);
/*-------------------------------------------------------------------*
* SYNCHRONOUS CALL SUPPORT *
*-------------------------------------------------------------------*/
struct usb_api_data
{
wait_queue_head_t wqh;
int done;
/* void* stuff; */ /* Possible extension later. */
};
/* -------------------------------------------------------------------------- */
struct usb_operations {
int (*allocate)(struct usb_device *);
int (*deallocate)(struct usb_device *);
int (*get_frame_number) (struct usb_device *usb_dev);
int (*submit_urb) (struct urb* purb);
int (*unlink_urb) (struct urb* purb);
};
#define DEVNUM_ROUND_ROBIN /***** OPTION *****/
/*
* Allocated per bus we have
*/
struct usb_bus {
int busnum; /* Bus number (in order of reg) */
#ifdef DEVNUM_ROUND_ROBIN
int devnum_next; /* Next open device number in round-robin allocation */
#endif /* DEVNUM_ROUND_ROBIN */
struct usb_devmap devmap; /* Device map */
struct usb_operations *op; /* Operations (specific to the HC) */
struct usb_device *root_hub; /* Root hub */
struct list_head bus_list;
void *hcpriv; /* Host Controller private data */
int bandwidth_allocated; /* on this Host Controller; */
/* applies to Int. and Isoc. pipes; */
/* measured in microseconds/frame; */
/* range is 0..900, where 900 = */
/* 90% of a 1-millisecond frame */
int bandwidth_int_reqs; /* number of Interrupt requesters */
int bandwidth_isoc_reqs; /* number of Isoc. requesters */
/* usbdevfs inode list */
struct list_head inodes;
atomic_t refcnt;
};
/*
* As of USB 2.0, full/low speed devices are segregated into trees.
* One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
* The other type grows from high speed hubs when they connect to
* full/low speed devices using "Transaction Translators" (TTs).
*
* TTs should only be known to the hub driver, and high speed bus
* drivers (only EHCI for now). They affect periodic scheduling and
* sometimes control/bulk error recovery.
*/
struct usb_tt {
struct usb_device *hub; /* upstream highspeed hub */
int multi; /* true means one TT per port */
};
/* This is arbitrary.
* From USB 2.0 spec Table 11-13, offset 7, a hub can
* have up to 255 ports. The most yet reported is 10.
*/
#define USB_MAXCHILDREN (16)
struct usb_device {
int devnum; /* Device number on USB bus */
enum {
USB_SPEED_UNKNOWN = 0, /* enumerating */
USB_SPEED_LOW, USB_SPEED_FULL, /* usb 1.1 */
USB_SPEED_HIGH /* usb 2.0 */
} speed;
struct usb_tt *tt; /* low/full speed dev, highspeed hub */
int ttport; /* device port on that tt hub */
atomic_t refcnt; /* Reference count */
struct semaphore serialize;
unsigned int toggle[2]; /* one bit for each endpoint ([0] = IN, [1] = OUT) */
unsigned int halted[2]; /* endpoint halts; one bit per endpoint # & direction; */
/* [0] = IN, [1] = OUT */
int epmaxpacketin[16]; /* INput endpoint specific maximums */
int epmaxpacketout[16]; /* OUTput endpoint specific maximums */
struct usb_device *parent;
struct usb_bus *bus; /* Bus we're part of */
struct usb_device_descriptor descriptor;/* Descriptor */
struct usb_config_descriptor *config; /* All of the configs */
struct usb_config_descriptor *actconfig;/* the active configuration */
char **rawdescriptors; /* Raw descriptors for each config */
int have_langid; /* whether string_langid is valid yet */
int string_langid; /* language ID for strings */
void *hcpriv; /* Host Controller private data */
/* usbdevfs inode list */
struct list_head inodes;
struct list_head filelist;
/*
* Child devices - these can be either new devices
* (if this is a hub device), or different instances
* of this same device.
*
* Each instance needs its own set of data structures.
*/
int maxchild; /* Number of ports if hub */
struct usb_device *children[USB_MAXCHILDREN];
};
extern struct usb_interface *usb_ifnum_to_if(struct usb_device *dev, unsigned ifnum);
extern struct usb_endpoint_descriptor *usb_epnum_to_ep_desc(struct usb_device *dev, unsigned epnum);
extern int usb_register(struct usb_driver *);
extern void usb_deregister(struct usb_driver *);
extern void usb_scan_devices(void);
/* used these for multi-interface device registration */
extern void usb_driver_claim_interface(struct usb_driver *driver, struct usb_interface *iface, void* priv);
extern int usb_interface_claimed(struct usb_interface *iface);
extern void usb_driver_release_interface(struct usb_driver *driver, struct usb_interface *iface);
const struct usb_device_id *usb_match_id(struct usb_device *dev,
struct usb_interface *interface,
const struct usb_device_id *id);
extern struct usb_bus *usb_alloc_bus(struct usb_operations *);
extern void usb_free_bus(struct usb_bus *);
extern void usb_register_bus(struct usb_bus *);
extern void usb_deregister_bus(struct usb_bus *);
extern struct usb_device *usb_alloc_dev(struct usb_device *parent, struct usb_bus *);
extern void usb_free_dev(struct usb_device *);
extern void usb_inc_dev_use(struct usb_device *);
#define usb_dec_dev_use usb_free_dev
extern int usb_check_bandwidth (struct usb_device *dev, struct urb *urb);
extern void usb_claim_bandwidth (struct usb_device *dev, struct urb *urb, int bustime, int isoc);
extern void usb_release_bandwidth(struct usb_device *dev, struct urb *urb, int isoc);
extern int usb_control_msg(struct usb_device *dev, unsigned int pipe, __u8 request, __u8 requesttype, __u16 value, __u16 index, void *data, __u16 size, int timeout);
extern int usb_root_hub_string(int id, int serial, char *type, __u8 *data, int len);
extern void usb_connect(struct usb_device *dev);
extern void usb_disconnect(struct usb_device **);
extern void usb_destroy_configuration(struct usb_device *dev);
int usb_get_current_frame_number (struct usb_device *usb_dev);
/*
* Calling this entity a "pipe" is glorifying it. A USB pipe
* is something embarrassingly simple: it basically consists
* of the following information:
* - device number (7 bits)
* - endpoint number (4 bits)
* - current Data0/1 state (1 bit)
* - direction (1 bit)
* - speed (1 bit)
* - max packet size (2 bits: 8, 16, 32 or 64) [Historical; now gone.]
* - pipe type (2 bits: control, interrupt, bulk, isochronous)
*
* That's 18 bits. Really. Nothing more. And the USB people have
* documented these eighteen bits as some kind of glorious
* virtual data structure.
*
* Let's not fall in that trap. We'll just encode it as a simple
* unsigned int. The encoding is:
*
* - max size: bits 0-1 (00 = 8, 01 = 16, 10 = 32, 11 = 64) [Historical; now gone.]
* - direction: bit 7 (0 = Host-to-Device [Out], 1 = Device-to-Host [In])
* - device: bits 8-14
* - endpoint: bits 15-18
* - Data0/1: bit 19
* - speed: bit 26 (0 = Full, 1 = Low Speed)
* - pipe type: bits 30-31 (00 = isochronous, 01 = interrupt, 10 = control, 11 = bulk)
*
* Why? Because it's arbitrary, and whatever encoding we select is really
* up to us. This one happens to share a lot of bit positions with the UHCI
* specification, so that much of the uhci driver can just mask the bits
* appropriately.
*
* NOTE: there's no encoding (yet?) for a "high speed" endpoint; treat them
* like full speed devices.
*/
#define PIPE_ISOCHRONOUS 0
#define PIPE_INTERRUPT 1
#define PIPE_CONTROL 2
#define PIPE_BULK 3
#define usb_maxpacket(dev, pipe, out) (out \
? (dev)->epmaxpacketout[usb_pipeendpoint(pipe)] \
: (dev)->epmaxpacketin [usb_pipeendpoint(pipe)] )
#define usb_packetid(pipe) (((pipe) & USB_DIR_IN) ? USB_PID_IN : USB_PID_OUT)
#define usb_pipeout(pipe) ((((pipe) >> 7) & 1) ^ 1)
#define usb_pipein(pipe) (((pipe) >> 7) & 1)
#define usb_pipedevice(pipe) (((pipe) >> 8) & 0x7f)
#define usb_pipe_endpdev(pipe) (((pipe) >> 8) & 0x7ff)
#define usb_pipeendpoint(pipe) (((pipe) >> 15) & 0xf)
#define usb_pipedata(pipe) (((pipe) >> 19) & 1)
#define usb_pipeslow(pipe) (((pipe) >> 26) & 1)
#define usb_pipetype(pipe) (((pipe) >> 30) & 3)
#define usb_pipeisoc(pipe) (usb_pipetype((pipe)) == PIPE_ISOCHRONOUS)
#define usb_pipeint(pipe) (usb_pipetype((pipe)) == PIPE_INTERRUPT)
#define usb_pipecontrol(pipe) (usb_pipetype((pipe)) == PIPE_CONTROL)
#define usb_pipebulk(pipe) (usb_pipetype((pipe)) == PIPE_BULK)
#define PIPE_DEVEP_MASK 0x0007ff00
/* The D0/D1 toggle bits */
#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> ep) & 1)
#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << ep))
#define usb_settoggle(dev, ep, out, bit) ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << ep)) | ((bit) << ep))
/* Endpoint halt control/status */
#define usb_endpoint_out(ep_dir) (((ep_dir >> 7) & 1) ^ 1)
#define usb_endpoint_halt(dev, ep, out) ((dev)->halted[out] |= (1 << (ep)))
#define usb_endpoint_running(dev, ep, out) ((dev)->halted[out] &= ~(1 << (ep)))
#define usb_endpoint_halted(dev, ep, out) ((dev)->halted[out] & (1 << (ep)))
static inline unsigned int __create_pipe(struct usb_device *dev, unsigned int endpoint)
{
return (dev->devnum << 8) | (endpoint << 15) |
((dev->speed == USB_SPEED_LOW) << 26);
}
static inline unsigned int __default_pipe(struct usb_device *dev)
{
return ((dev->speed == USB_SPEED_LOW) << 26);
}
/* Create various pipes... */
#define usb_sndctrlpipe(dev,endpoint) ((PIPE_CONTROL << 30) | __create_pipe(dev,endpoint))
#define usb_rcvctrlpipe(dev,endpoint) ((PIPE_CONTROL << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_sndisocpipe(dev,endpoint) ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev,endpoint))
#define usb_rcvisocpipe(dev,endpoint) ((PIPE_ISOCHRONOUS << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_sndbulkpipe(dev,endpoint) ((PIPE_BULK << 30) | __create_pipe(dev,endpoint))
#define usb_rcvbulkpipe(dev,endpoint) ((PIPE_BULK << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_sndintpipe(dev,endpoint) ((PIPE_INTERRUPT << 30) | __create_pipe(dev,endpoint))
#define usb_rcvintpipe(dev,endpoint) ((PIPE_INTERRUPT << 30) | __create_pipe(dev,endpoint) | USB_DIR_IN)
#define usb_snddefctrl(dev) ((PIPE_CONTROL << 30) | __default_pipe(dev))
#define usb_rcvdefctrl(dev) ((PIPE_CONTROL << 30) | __default_pipe(dev) | USB_DIR_IN)
/*
* Send and receive control messages..
*/
int usb_new_device(struct usb_device *dev);
int usb_reset_device(struct usb_device *dev);
int usb_set_address(struct usb_device *dev);
int usb_get_descriptor(struct usb_device *dev, unsigned char desctype,
unsigned char descindex, void *buf, int size);
int usb_get_class_descriptor(struct usb_device *dev, int ifnum, unsigned char desctype,
unsigned char descindex, void *buf, int size);
int usb_get_device_descriptor(struct usb_device *dev);
int __usb_get_extra_descriptor(char *buffer, unsigned size, unsigned char type, void **ptr);
int usb_get_status(struct usb_device *dev, int type, int target, void *data);
int usb_get_configuration(struct usb_device *dev);
int usb_get_protocol(struct usb_device *dev, int ifnum);
int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol);
int usb_set_interface(struct usb_device *dev, int ifnum, int alternate);
int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id);
int usb_set_configuration(struct usb_device *dev, int configuration);
int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type,
unsigned char id, void *buf, int size);
int usb_set_report(struct usb_device *dev, int ifnum, unsigned char type,
unsigned char id, void *buf, int size);
int usb_string(struct usb_device *dev, int index, char *buf, size_t size);
int usb_clear_halt(struct usb_device *dev, int pipe);
void usb_set_maxpacket(struct usb_device *dev);
#define usb_get_extra_descriptor(ifpoint,type,ptr)\
__usb_get_extra_descriptor((ifpoint)->extra,(ifpoint)->extralen,type,(void**)ptr)
/*
* Some USB bandwidth allocation constants.
*/
#define BW_HOST_DELAY 1000L /* nanoseconds */
#define BW_HUB_LS_SETUP 333L /* nanoseconds */
/* 4 full-speed bit times (est.) */
#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
#define FRAME_TIME_USECS 1000L
#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
/* Trying not to use worst-case bit-stuffing
of (7/6 * 8 * bytecount) = 9.33 * bytecount */
/* bytecount = data payload byte count */
#define NS_TO_US(ns) ((ns + 500L) / 1000L)
/* convert & round nanoseconds to microseconds */
/*
* Debugging helpers..
*/
void usb_show_device_descriptor(struct usb_device_descriptor *);
void usb_show_config_descriptor(struct usb_config_descriptor *);
void usb_show_interface_descriptor(struct usb_interface_descriptor *);
void usb_show_endpoint_descriptor(struct usb_endpoint_descriptor *);
void usb_show_device(struct usb_device *);
void usb_show_string(struct usb_device *dev, char *id, int index);
#ifdef DEBUG
#define dbg(format, arg...) printk(KERN_DEBUG __FILE__ ": " format "\n" , ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif
#define err(format, arg...) printk(KERN_ERR __FILE__ ": " format "\n" , ## arg)
#define info(format, arg...) printk(KERN_INFO __FILE__ ": " format "\n" , ## arg)
#define warn(format, arg...) printk(KERN_WARNING __FILE__ ": " format "\n" , ## arg)
/*
* bus and driver list
*/
extern struct list_head usb_driver_list;
extern struct list_head usb_bus_list;
extern struct semaphore usb_bus_list_lock;
/*
* USB device fs stuff
*/
#ifdef CONFIG_USB_DEVICEFS
/*
* these are expected to be called from the USB core/hub thread
* with the kernel lock held
*/
extern void usbdevfs_add_bus(struct usb_bus *bus);
extern void usbdevfs_remove_bus(struct usb_bus *bus);
extern void usbdevfs_add_device(struct usb_device *dev);
extern void usbdevfs_remove_device(struct usb_device *dev);
extern int usbdevfs_init(void);
extern void usbdevfs_cleanup(void);
#else /* CONFIG_USB_DEVICEFS */
static inline void usbdevfs_add_bus(struct usb_bus *bus) {}
static inline void usbdevfs_remove_bus(struct usb_bus *bus) {}
static inline void usbdevfs_add_device(struct usb_device *dev) {}
static inline void usbdevfs_remove_device(struct usb_device *dev) {}
static inline int usbdevfs_init(void) { return 0; }
static inline void usbdevfs_cleanup(void) { }
#endif /* CONFIG_USB_DEVICEFS */
#endif /* __KERNEL__ */
#endif
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