X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/fnordlicht-mini/blobdiff_plain/24562c8a748c379de491019607921e5959459464..745723e4d1fee18fc31d79172fe8357a75628eea:/firmware/fnordlicht-controller/usbdrv/asmcommon.inc

diff --git a/firmware/fnordlicht-controller/usbdrv/asmcommon.inc b/firmware/fnordlicht-controller/usbdrv/asmcommon.inc
deleted file mode 100644
index 07d692b..0000000
--- a/firmware/fnordlicht-controller/usbdrv/asmcommon.inc
+++ /dev/null
@@ -1,188 +0,0 @@
-/* Name: asmcommon.inc
- * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers
- * Author: Christian Starkjohann
- * Creation Date: 2007-11-05
- * Tabsize: 4
- * Copyright: (c) 2007 by OBJECTIVE DEVELOPMENT Software GmbH
- * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
- * Revision: $Id$
- */
-
-/* Do not link this file! Link usbdrvasm.S instead, which includes the
- * appropriate implementation!
- */
-
-/*
-General Description:
-This file contains assembler code which is shared among the USB driver
-implementations for different CPU cocks. Since the code must be inserted
-in the middle of the module, it's split out into this file and #included.
-
-Jump destinations called from outside:
-    sofError: Called when no start sequence was found.
-    se0: Called when a package has been successfully received.
-    overflow: Called when receive buffer overflows.
-    doReturn: Called after sending data.
-
-Outside jump destinations used by this module:
-    waitForJ: Called to receive an already arriving packet.
-    sendAckAndReti:
-    sendNakAndReti:
-    sendCntAndReti:
-    usbSendAndReti:
-
-The following macros must be defined before this file is included:
-    .macro POP_STANDARD
-    .endm
-    .macro POP_RETI
-    .endm
-*/
-
-#define token   x1
-
-overflow:
-    ldi     x2, 1<<USB_INTR_PENDING_BIT
-    USB_STORE_PENDING(x2)       ; clear any pending interrupts
-ignorePacket:
-    clr     token
-    rjmp    storeTokenAndReturn
-
-;----------------------------------------------------------------------------
-; Processing of received packet (numbers in brackets are cycles after center of SE0)
-;----------------------------------------------------------------------------
-;This is the only non-error exit point for the software receiver loop
-;we don't check any CRCs here because there is no time left.
-se0:
-    subi    cnt, USB_BUFSIZE    ;[5]
-    neg     cnt                 ;[6]
-    sub     YL, cnt             ;[7]
-    sbci    YH, 0               ;[8]
-    ldi     x2, 1<<USB_INTR_PENDING_BIT ;[9]
-    USB_STORE_PENDING(x2)       ;[10] clear pending intr and check flag later. SE0 should be over.
-    ld      token, y            ;[11]
-    cpi     token, USBPID_DATA0 ;[13]
-    breq    handleData          ;[14]
-    cpi     token, USBPID_DATA1 ;[15]
-    breq    handleData          ;[16]
-    lds     shift, usbDeviceAddr;[17]
-    ldd     x2, y+1             ;[19] ADDR and 1 bit endpoint number
-    lsl     x2                  ;[21] shift out 1 bit endpoint number
-    cpse    x2, shift           ;[22]
-    rjmp    ignorePacket        ;[23]
-/* only compute endpoint number in x3 if required later */
-#if USB_CFG_HAVE_INTRIN_ENDPOINT || USB_CFG_IMPLEMENT_FN_WRITEOUT
-    ldd     x3, y+2             ;[24] endpoint number + crc
-    rol     x3                  ;[26] shift in LSB of endpoint
-#endif
-    cpi     token, USBPID_IN    ;[27]
-    breq    handleIn            ;[28]
-    cpi     token, USBPID_SETUP ;[29]
-    breq    handleSetupOrOut    ;[30]
-    cpi     token, USBPID_OUT   ;[31]
-    brne    ignorePacket        ;[32] must be ack, nak or whatever
-;   rjmp    handleSetupOrOut    ; fallthrough
-
-;Setup and Out are followed by a data packet two bit times (16 cycles) after
-;the end of SE0. The sync code allows up to 40 cycles delay from the start of
-;the sync pattern until the first bit is sampled. That's a total of 56 cycles.
-handleSetupOrOut:               ;[32]
-#if USB_CFG_IMPLEMENT_FN_WRITEOUT   /* if we have data for endpoint != 0, set usbCurrentTok to address */
-    andi    x3, 0xf             ;[32]
-    breq    storeTokenAndReturn ;[33]
-    mov     token, x3           ;[34] indicate that this is endpoint x OUT
-#endif
-storeTokenAndReturn:
-    sts     usbCurrentTok, token;[35]
-doReturn:
-    POP_STANDARD                ;[37] 12...16 cycles
-    USB_LOAD_PENDING(YL)        ;[49]
-    sbrc    YL, USB_INTR_PENDING_BIT;[50] check whether data is already arriving
-    rjmp    waitForJ            ;[51] save the pops and pushes -- a new interrupt is already pending
-sofError:
-    POP_RETI                    ;macro call
-    reti
-
-handleData:
-#if USB_CFG_CHECK_CRC
-    CRC_CLEANUP_AND_CHECK       ; jumps to ignorePacket if CRC error
-#endif
-    lds     shift, usbCurrentTok;[18]
-    tst     shift               ;[20]
-    breq    doReturn            ;[21]
-    lds     x2, usbRxLen        ;[22]
-    tst     x2                  ;[24]
-    brne    sendNakAndReti      ;[25]
-; 2006-03-11: The following two lines fix a problem where the device was not
-; recognized if usbPoll() was called less frequently than once every 4 ms.
-    cpi     cnt, 4              ;[26] zero sized data packets are status phase only -- ignore and ack
-    brmi    sendAckAndReti      ;[27] keep rx buffer clean -- we must not NAK next SETUP
-#if USB_CFG_CHECK_DATA_TOGGLING
-    sts     usbCurrentDataToken, token  ; store for checking by C code
-#endif
-    sts     usbRxLen, cnt       ;[28] store received data, swap buffers
-    sts     usbRxToken, shift   ;[30]
-    lds     x2, usbInputBufOffset;[32] swap buffers
-    ldi     cnt, USB_BUFSIZE    ;[34]
-    sub     cnt, x2             ;[35]
-    sts     usbInputBufOffset, cnt;[36] buffers now swapped
-    rjmp    sendAckAndReti      ;[38] 40 + 17 = 57 until SOP
-
-handleIn:
-;We don't send any data as long as the C code has not processed the current
-;input data and potentially updated the output data. That's more efficient
-;in terms of code size than clearing the tx buffers when a packet is received.
-    lds     x1, usbRxLen        ;[30]
-    cpi     x1, 1               ;[32] negative values are flow control, 0 means "buffer free"
-    brge    sendNakAndReti      ;[33] unprocessed input packet?
-    ldi     x1, USBPID_NAK      ;[34] prepare value for usbTxLen
-#if USB_CFG_HAVE_INTRIN_ENDPOINT
-    andi    x3, 0xf             ;[35] x3 contains endpoint
-#if USB_CFG_SUPPRESS_INTR_CODE
-    brne    sendNakAndReti      ;[36]
-#else
-    brne    handleIn1           ;[36]
-#endif
-#endif
-    lds     cnt, usbTxLen       ;[37]
-    sbrc    cnt, 4              ;[39] all handshake tokens have bit 4 set
-    rjmp    sendCntAndReti      ;[40] 42 + 16 = 58 until SOP
-    sts     usbTxLen, x1        ;[41] x1 == USBPID_NAK from above
-    ldi     YL, lo8(usbTxBuf)   ;[43]
-    ldi     YH, hi8(usbTxBuf)   ;[44]
-    rjmp    usbSendAndReti      ;[45] 57 + 12 = 59 until SOP
-
-; Comment about when to set usbTxLen to USBPID_NAK:
-; We should set it back when we receive the ACK from the host. This would
-; be simple to implement: One static variable which stores whether the last
-; tx was for endpoint 0 or 1 and a compare in the receiver to distinguish the
-; ACK. However, we set it back immediately when we send the package,
-; assuming that no error occurs and the host sends an ACK. We save one byte
-; RAM this way and avoid potential problems with endless retries. The rest of
-; the driver assumes error-free transfers anyway.
-
-#if !USB_CFG_SUPPRESS_INTR_CODE && USB_CFG_HAVE_INTRIN_ENDPOINT /* placed here due to relative jump range */
-handleIn1:                      ;[38]
-#if USB_CFG_HAVE_INTRIN_ENDPOINT3
-; 2006-06-10 as suggested by O.Tamura: support second INTR IN / BULK IN endpoint
-    cpi     x3, USB_CFG_EP3_NUMBER;[38]
-    breq    handleIn3           ;[39]
-#endif
-    lds     cnt, usbTxLen1      ;[40]
-    sbrc    cnt, 4              ;[42] all handshake tokens have bit 4 set
-    rjmp    sendCntAndReti      ;[43] 47 + 16 = 63 until SOP
-    sts     usbTxLen1, x1       ;[44] x1 == USBPID_NAK from above
-    ldi     YL, lo8(usbTxBuf1)  ;[46]
-    ldi     YH, hi8(usbTxBuf1)  ;[47]
-    rjmp    usbSendAndReti      ;[48] 50 + 12 = 62 until SOP
-
-#if USB_CFG_HAVE_INTRIN_ENDPOINT3
-handleIn3:
-    lds     cnt, usbTxLen3      ;[41]
-    sbrc    cnt, 4              ;[43]
-    rjmp    sendCntAndReti      ;[44] 49 + 16 = 65 until SOP
-    sts     usbTxLen3, x1       ;[45] x1 == USBPID_NAK from above
-    ldi     YL, lo8(usbTxBuf3)  ;[47]
-    ldi     YH, hi8(usbTxBuf3)  ;[48]
-    rjmp    usbSendAndReti      ;[49] 51 + 12 = 63 until SOP
-#endif
-#endif