s3c2410_usb.h
上传用户:lgb322
上传日期:2013-02-24
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文件大小:7k
- /*
- * s3c2410_usb.h
- *
- * Public interface to the s3c2410 USB core. For use by client modules
- * like usb-eth and usb-char.
- *
- */
- #ifndef _S3C2410_USB_H
- #define _S3C2410_USB_H
- #include <asm/byteorder.h>
- //#define USE_USBD_DMA 0
- #undef USE_USBD_DMA
- typedef void (*usb_callback_t)(int flag, int size);
- /* in usb_ctl.c (see also descriptor methods at bottom of file) */
- // Open the USB client for client and initialize data structures
- // to default values, but _do not_ start UDC.
- int s3c2410_usb_open( const char * client_name );
- // Start UDC running
- int s3c2410_usb_start( void );
- // Immediately stop udc, fire off completion routines w/-EINTR
- int s3c2410_usb_stop( void ) ;
- // Disconnect client from usb core
- int s3c2410_usb_close( void ) ;
- // set notify callback for when core reaches configured state
- // return previous pointer (if any)
- typedef void (*usb_notify_t)(void);
- usb_notify_t s3c2410_set_configured_callback( usb_notify_t callback );
- /* in usb_send.c */
- int s3c2410_usb_xmitter_avail( void );
- int s3c2410_usb_send(char *buf, int len, usb_callback_t callback);
- void s3c2410_usb_send_reset(void);
- /* in usb_recev.c */
- int s3c2410_usb_recv(char *buf, int len, usb_callback_t callback);
- void s3c2410_usb_recv_reset(void);
- //////////////////////////////////////////////////////////////////////////////
- // Descriptor Management
- //////////////////////////////////////////////////////////////////////////////
- #define DescriptorHeader
- __u8 bLength;
- __u8 bDescriptorType
- // --- Device Descriptor -------------------
- typedef struct {
- DescriptorHeader;
- __u16 bcdUSB; /* USB specification revision number in BCD */
- __u8 bDeviceClass; /* USB class for entire device */
- __u8 bDeviceSubClass; /* USB subclass information for entire device */
- __u8 bDeviceProtocol; /* USB protocol information for entire device */
- __u8 bMaxPacketSize0; /* Max packet size for endpoint zero */
- __u16 idVendor; /* USB vendor ID */
- __u16 idProduct; /* USB product ID */
- __u16 bcdDevice; /* vendor assigned device release number */
- __u8 iManufacturer; /* index of manufacturer string */
- __u8 iProduct; /* index of string that describes product */
- __u8 iSerialNumber; /* index of string containing device serial number */
- __u8 bNumConfigurations; /* number fo configurations */
- } __attribute__ ((packed)) device_desc_t;
- // --- Configuration Descriptor ------------
- typedef struct {
- DescriptorHeader;
- __u16 wTotalLength; /* total # of bytes returned in the cfg buf 4 this cfg */
- __u8 bNumInterfaces; /* number of interfaces in this cfg */
- __u8 bConfigurationValue; /* used to uniquely ID this cfg */
- __u8 iConfiguration; /* index of string describing configuration */
- __u8 bmAttributes; /* bitmap of attributes for ths cfg */
- __u8 MaxPower; /* power draw in 2ma units */
- } __attribute__ ((packed)) config_desc_t;
- // bmAttributes:
- enum { USB_CONFIG_REMOTEWAKE=0x20, USB_CONFIG_SELFPOWERED=0x40,
- USB_CONFIG_BUSPOWERED=0x80 };
- // MaxPower:
- #define USB_POWER( x) ((x)>>1) /* convert mA to descriptor units of A for MaxPower */
- // --- Interface Descriptor ---------------
- typedef struct {
- DescriptorHeader;
- __u8 bInterfaceNumber; /* Index uniquely identfying this interface */
- __u8 bAlternateSetting; /* ids an alternate setting for this interface */
- __u8 bNumEndpoints; /* number of endpoints in this interface */
- __u8 bInterfaceClass; /* USB class info applying to this interface */
- __u8 bInterfaceSubClass; /* USB subclass info applying to this interface */
- __u8 bInterfaceProtocol; /* USB protocol info applying to this interface */
- __u8 iInterface; /* index of string describing interface */
- } __attribute__ ((packed)) intf_desc_t;
- // --- Endpoint Descriptor ---------------
- typedef struct {
- DescriptorHeader;
- __u8 bEndpointAddress; /* 0..3 ep num, bit 7: 0 = 0ut 1= in */
- __u8 bmAttributes; /* 0..1 = 0: ctrl, 1: isoc, 2: bulk 3: intr */
- __u16 wMaxPacketSize; /* data payload size for this ep in this cfg */
- __u8 bInterval; /* polling interval for this ep in this cfg */
- } __attribute__ ((packed)) ep_desc_t;
- // bEndpointAddress:
- /*
- * bEndpointAddress[0:7]
- * [0:3] - The endpoint number
- * [4:6] - Reserved, reset to zero
- * [7] - Direction, ignored for contol endpoint
- * 0 = OUT endpoint
- * 1 = IN endpoint
- * shawn
- */
- enum { USB_OUT=0, USB_IN=1 };
-
- #define USB_EP_ADDRESS(a,d) (((a)&0xf) | ((d) << 7))
- // bmAttributes:
- enum { USB_EP_CNTRL=0, USB_EP_BULK=2, USB_EP_INT=3 };
- // --- String Descriptor -------------------
- typedef struct {
- DescriptorHeader;
- __u16 bString[1]; /* unicode string .. actaully 'n' __u16s */
- } __attribute__ ((packed)) string_desc_t;
- /*=======================================================
- * Handy helpers when working with above
- *
- */
- // these are x86-style 16 bit "words" ...
- #define make_word_c( w ) __constant_cpu_to_le16(w)
- #define make_word( w ) __cpu_to_le16(w)
- // descriptor types
- enum { USB_DESC_DEVICE=1, USB_DESC_CONFIG=2, USB_DESC_STRING=3,
- USB_DESC_INTERFACE=4, USB_DESC_ENDPOINT=5 };
- /*=======================================================
- * Default descriptor layout for S3C2410 UDC
- */
- /* "config descriptor buffer" - that is, one config,
- ..one interface and 2 endpoints */
- struct cdb {
- config_desc_t cfg;
- intf_desc_t intf;
- ep_desc_t ep1; // DOWN stream(OUT), 64byte BULK)
- ep_desc_t ep2; // UP stream(IN), 64byte BULK)
- } __attribute__ ((packed));
- /* all S3C2410 device descriptors */
- typedef struct {
- device_desc_t dev; /* device descriptor */
- struct cdb b; /* bundle of descriptors for this cfg */
- } __attribute__ ((packed)) desc_t;
- /*=======================================================
- * Descriptor API
- */
- /* Get the address of the statically allocated desc_t structure
- in the usb core driver. Clients can modify this between
- the time they call s3c2410_usb_open() and s3c2410_usb_start()
- */
- desc_t *
- s3c2410_usb_get_descriptor_ptr( void );
- /* Set a pointer to the string descriptor at "index". The driver
- ..has room for 8 string indicies internally. Index zero holds
- ..a LANGID code and is set to US English by default. Inidices
- ..1-7 are available for use in the config descriptors as client's
- ..see fit. This pointer is assumed to be good as long as the
- ..S3C2410 usb core is open (so statically allocate them). Returnes -EINVAL
- ..if index out of range */
- int s3c2410_usb_set_string_descriptor( int index, string_desc_t * p );
- /* reverse of above */
- string_desc_t *
- s3c2410_usb_get_string_descriptor( int index );
- /* kmalloc() a string descriptor and convert "p" to unicode in it */
- string_desc_t *
- s3c2410_usb_kmalloc_string_descriptor( const char * p );
- #endif /* _S3C2410_USB_H */