; USB Descriptors for Genpix SkyWalker-1 Custom Firmware
;
; VID=0x09C0, PID=0x0203
; Single interface, EP2 IN bulk 512-byte for TS data

.module DEV_DSCR

; descriptor types
DSCR_DEVICE_TYPE=1
DSCR_CONFIG_TYPE=2
DSCR_STRING_TYPE=3
DSCR_INTERFACE_TYPE=4
DSCR_ENDPOINT_TYPE=5
DSCR_DEVQUAL_TYPE=6

; for the repeating interfaces
DSCR_INTERFACE_LEN=9
DSCR_ENDPOINT_LEN=7

; endpoint types
ENDPOINT_TYPE_CONTROL=0
ENDPOINT_TYPE_ISO=1
ENDPOINT_TYPE_BULK=2
ENDPOINT_TYPE_INT=3

    .globl	_dev_dscr, _dev_qual_dscr, _highspd_dscr, _fullspd_dscr, _dev_strings, _dev_strings_end
    .area	DSCR_AREA	(CODE)

_dev_dscr:
	.db	dev_dscr_end-_dev_dscr    ; len
	.db	DSCR_DEVICE_TYPE          ; type
	.dw	0x0002                    ; usb 2.0
	.db	0xff                      ; class (vendor specific)
	.db	0xff                      ; subclass (vendor specific)
	.db	0xff                      ; protocol (vendor specific)
	.db	64                        ; packet size (ep0)
	.dw	0xC009                    ; vendor id 0x09C0 (byte-swapped)
	.dw	0x0302                    ; product id 0x0203 (byte-swapped)
	.dw	0x0100                    ; version id
	.db	1                         ; manufacturer str idx
	.db	2                         ; product str idx
	.db	3                         ; serial str idx
	.db	1                         ; n configurations
dev_dscr_end:

_dev_qual_dscr:
	.db	dev_qualdscr_end-_dev_qual_dscr
	.db	DSCR_DEVQUAL_TYPE
	.dw	0x0002                    ; usb 2.0
	.db	0xff
	.db	0xff
	.db	0xff
	.db	64                        ; max packet
	.db	1                         ; n configs
	.db	0                         ; extra reserved byte
dev_qualdscr_end:

; --- High speed configuration descriptor ---
_highspd_dscr:
	.db	highspd_dscr_end-_highspd_dscr
	.db	DSCR_CONFIG_TYPE
	.db	(highspd_dscr_realend-_highspd_dscr) % 256 ; total length lsb
	.db	(highspd_dscr_realend-_highspd_dscr) / 256 ; total length msb
	.db	1                         ; n interfaces
	.db	1                         ; config number
	.db	0                         ; config string
	.db	0x80                      ; attrs = bus powered, no wakeup
	.db	0xFA                      ; max power = 500mA (0xFA * 2 = 500)
highspd_dscr_end:

; interface 0
	.db	DSCR_INTERFACE_LEN
	.db	DSCR_INTERFACE_TYPE
	.db	0                         ; index
	.db	0                         ; alt setting idx
	.db	1                         ; n endpoints (EP2 IN only)
	.db	0xff                      ; class (vendor specific)
	.db	0xff
	.db	0xff
	.db	4                         ; string index

; endpoint 2 IN (0x82) -- MPEG-2 transport stream bulk
	.db	DSCR_ENDPOINT_LEN
	.db	DSCR_ENDPOINT_TYPE
	.db	0x82                      ; ep2 dir=IN and address
	.db	ENDPOINT_TYPE_BULK        ; type
	.db	0x00                      ; max packet LSB
	.db	0x02                      ; max packet size=512 bytes
	.db	0x00                      ; polling interval

highspd_dscr_realend:

    .even
; --- Full speed configuration descriptor ---
_fullspd_dscr:
	.db	fullspd_dscr_end-_fullspd_dscr
	.db	DSCR_CONFIG_TYPE
	.db	(fullspd_dscr_realend-_fullspd_dscr) % 256 ; total length lsb
	.db	(fullspd_dscr_realend-_fullspd_dscr) / 256 ; total length msb
	.db	1                         ; n interfaces
	.db	1                         ; config number
	.db	0                         ; config string
	.db	0x80                      ; attrs = bus powered, no wakeup
	.db	0xFA                      ; max power = 500mA
fullspd_dscr_end:

; interface 0
	.db	DSCR_INTERFACE_LEN
	.db	DSCR_INTERFACE_TYPE
	.db	0                         ; index
	.db	0                         ; alt setting idx
	.db	1                         ; n endpoints
	.db	0xff                      ; class (vendor specific)
	.db	0xff
	.db	0xff
	.db	4                         ; string index

; endpoint 2 IN (0x82) -- bulk 64 byte at full speed
	.db	DSCR_ENDPOINT_LEN
	.db	DSCR_ENDPOINT_TYPE
	.db	0x82                      ; ep2 dir=IN and address
	.db	ENDPOINT_TYPE_BULK        ; type
	.db	0x40                      ; max packet LSB = 64
	.db	0x00                      ; max packet size MSB
	.db	0x00                      ; polling interval

fullspd_dscr_realend:

.even
_dev_strings:

; string 0 -- language descriptor
_string0:
	.db	string0end-_string0
	.db	DSCR_STRING_TYPE
	.db	0x09, 0x04                ; English (US)
string0end:

; string 1 -- manufacturer
_string1:
	.db	string1end-_string1
	.db	DSCR_STRING_TYPE
	.ascii 'G'
	.db 0
	.ascii 'e'
	.db 0
	.ascii 'n'
	.db 0
	.ascii 'p'
	.db 0
	.ascii 'i'
	.db 0
	.ascii 'x'
	.db 0
string1end:

; string 2 -- product
_string2:
	.db	string2end-_string2
	.db	DSCR_STRING_TYPE
	.ascii 'S'
	.db 0
	.ascii 'k'
	.db 0
	.ascii 'y'
	.db 0
	.ascii 'W'
	.db 0
	.ascii 'a'
	.db 0
	.ascii 'l'
	.db 0
	.ascii 'k'
	.db 0
	.ascii 'e'
	.db 0
	.ascii 'r'
	.db 0
	.ascii '-'
	.db 0
	.ascii '1'
	.db 0
	.ascii ' '
	.db 0
	.ascii 'C'
	.db 0
	.ascii 'u'
	.db 0
	.ascii 's'
	.db 0
	.ascii 't'
	.db 0
	.ascii 'o'
	.db 0
	.ascii 'm'
	.db 0
string2end:

; string 3 -- serial number
_string3:
	.db	string3end-_string3
	.db	DSCR_STRING_TYPE
	.ascii '0'
	.db 0
	.ascii '0'
	.db 0
	.ascii '0'
	.db 0
	.ascii '1'
	.db 0
string3end:

; string 4 -- interface
_string4:
	.db	string4end-_string4
	.db	DSCR_STRING_TYPE
	.ascii 'D'
	.db 0
	.ascii 'V'
	.db 0
	.ascii 'B'
	.db 0
	.ascii '-'
	.db 0
	.ascii 'S'
	.db 0
string4end:

_dev_strings_end:
	.dw 0x0000