📄 usbhw.lst
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295 1 DEV_INT_CLR = EP_RLZED_INT;
296 1 }
297
298
299 /*
300 * Set Direction for USB Control Endpoint
301 * Parameters: dir: Out (dir == 0), In (dir <> 0)
302 * Return Value: None
303 */
304
305 void USB_DirCtrlEP (DWORD dir) {
306 1 dir; /* Not needed */
307 1 }
308
309
310 /*
311 * Enable USB Endpoint
312 * Parameters: EPNum: Endpoint Number
313 * EPNum.0..3: Address
314 * EPNum.7: Dir
315 * Return Value: None
316 */
317
318 void USB_EnableEP (DWORD EPNum) {
319 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
320 1 }
321
322
323 /*
ARM COMPILER V2.53, usbhw 05/09/06 14:20:49 PAGE 6
324 * Disable USB Endpoint
325 * Parameters: EPNum: Endpoint Number
326 * EPNum.0..3: Address
327 * EPNum.7: Dir
328 * Return Value: None
329 */
330
331 void USB_DisableEP (DWORD EPNum) {
332 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_DA));
333 1 }
334
335
336 /*
337 * Reset USB Endpoint
338 * Parameters: EPNum: Endpoint Number
339 * EPNum.0..3: Address
340 * EPNum.7: Dir
341 * Return Value: None
342 */
343
344 void USB_ResetEP (DWORD EPNum) {
345 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
346 1 }
347
348
349 /*
350 * Set Stall for USB Endpoint
351 * Parameters: EPNum: Endpoint Number
352 * EPNum.0..3: Address
353 * EPNum.7: Dir
354 * Return Value: None
355 */
356
357 void USB_SetStallEP (DWORD EPNum) {
358 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_ST));
359 1 }
360
361
362 /*
363 * Clear Stall for USB Endpoint
364 * Parameters: EPNum: Endpoint Number
365 * EPNum.0..3: Address
366 * EPNum.7: Dir
367 * Return Value: None
368 */
369
370 void USB_ClrStallEP (DWORD EPNum) {
371 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
372 1 }
373
374
375 /*
376 * Read USB Endpoint Data
377 * Parameters: EPNum: Endpoint Number
378 * EPNum.0..3: Address
379 * EPNum.7: Dir
380 * pData: Pointer to Data Buffer
381 * Return Value: Number of bytes read
382 */
383
384 DWORD USB_ReadEP (DWORD EPNum, BYTE *pData) {
385 1 DWORD cnt, n;
386 1
387 1 USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_RD_EN;
388 1
389 1 do {
ARM COMPILER V2.53, usbhw 05/09/06 14:20:49 PAGE 7
390 2 cnt = RX_PLENGTH;
391 2 } while ((cnt & PKT_RDY) == 0);
392 1 cnt &= PKT_LNGTH_MASK;
393 1
394 1 for (n = 0; n < (cnt + 3) / 4; n++) {
395 2 *((__packed DWORD *)pData) = RX_DATA;
396 2 pData += 4;
397 2 }
398 1
399 1 USB_CTRL = 0;
400 1
401 1 if (((EP_MSK_ISO >> EPNum) & 1) == 0) { /* Non-Isochronous Endpoint */
402 2 WrCmd(CMD_SEL_EP(EPAdr(EPNum)));
403 2 WrCmd(CMD_CLR_BUF);
404 2 }
405 1
406 1 return (cnt);
407 1 }
408
409
410 /*
411 * Write USB Endpoint Data
412 * Parameters: EPNum: Endpoint Number
413 * EPNum.0..3: Address
414 * EPNum.7: Dir
415 * pData: Pointer to Data Buffer
416 * cnt: Number of bytes to write
417 * Return Value: Number of bytes written
418 */
419
420 DWORD USB_WriteEP (DWORD EPNum, BYTE *pData, DWORD cnt) {
421 1 DWORD n;
422 1
423 1 USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_WR_EN;
424 1
425 1 TX_PLENGTH = cnt;
426 1
427 1 for (n = 0; n < (cnt + 3) / 4; n++) {
428 2 TX_DATA = *((__packed DWORD *)pData);
429 2 pData += 4;
430 2 }
431 1
432 1 USB_CTRL = 0;
433 1
434 1 WrCmd(CMD_SEL_EP(EPAdr(EPNum)));
435 1 WrCmd(CMD_VALID_BUF);
436 1
437 1 return (cnt);
438 1 }
439
440
441 #if USB_DMA
/* DMA Descriptor Memory Layout */
const DWORD DDAdr[2] = { DD_NISO_ADR, DD_ISO_ADR };
const DWORD DDSz [2] = { 16, 20 };
/*
* Setup USB DMA Transfer for selected Endpoint
* Parameters: EPNum: Endpoint Number
* pDD: Pointer to DMA Descriptor
* Return Value: TRUE - Success, FALSE - Error
*/
ARM COMPILER V2.53, usbhw 05/09/06 14:20:49 PAGE 8
BOOL USB_DMA_Setup(DWORD EPNum, USB_DMA_DESCRIPTOR *pDD) {
DWORD num, ptr, nxt, iso, n;
iso = pDD->Cfg.Type.IsoEP; /* Iso or Non-Iso Descriptor */
num = EPAdr(EPNum); /* Endpoint's Physical Address */
ptr = 0; /* Current Descriptor */
nxt = udca[num]; /* Initial Descriptor */
while (nxt) { /* Go through Descriptor List */
ptr = nxt; /* Current Descriptor */
if (!pDD->Cfg.Type.Link) { /* Check for Linked Descriptors */
n = (ptr - DDAdr[iso]) / DDSz[iso]; /* Descriptor Index */
DDMemMap[iso] &= ~(1 << n); /* Unmark Memory Usage */
}
nxt = *((DWORD *)ptr); /* Next Descriptor */
}
for (n = 0; n < 32; n++) { /* Search for available Memory */
if ((DDMemMap[iso] & (1 << n)) == 0) {
break; /* Memory found */
}
}
if (n == 32) return (FALSE); /* Memory not available */
DDMemMap[iso] |= 1 << n; /* Mark Memory Usage */
nxt = DDAdr[iso] + n * DDSz[iso]; /* Next Descriptor */
if (ptr && pDD->Cfg.Type.Link) {
*((DWORD *)(ptr + 0)) = nxt; /* Link in new Descriptor */
*((DWORD *)(ptr + 4)) |= 0x00000004; /* Next DD is Valid */
} else {
udca[num] = nxt; /* Save new Descriptor */
UDCA[num] = nxt; /* Update UDCA in USB */
}
/* Fill in DMA Descriptor */
*(((DWORD *)nxt)++) = 0; /* Next DD Pointer */
*(((DWORD *)nxt)++) = pDD->Cfg.Type.ATLE |
(pDD->Cfg.Type.IsoEP << 4) |
(pDD->MaxSize << 5) |
(pDD->BufLen << 16);
*(((DWORD *)nxt)++) = pDD->BufAdr;
*(((DWORD *)nxt)++) = pDD->Cfg.Type.LenPos << 8;
if (iso) {
*((DWORD *)nxt) = pDD->InfoAdr;
}
return (TRUE); /* Success */
}
/*
* Enable USB DMA Endpoint
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_DMA_Enable (DWORD EPNum) {
EP_DMA_EN = 1 << EPAdr(EPNum);
}
/*
* Disable USB DMA Endpoint
ARM COMPILER V2.53, usbhw 05/09/06 14:20:49 PAGE 9
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
void USB_DMA_Disable (DWORD EPNum) {
EP_DMA_DIS = 1 << EPAdr(EPNum);
}
/*
* Get USB DMA Endpoint Status
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: DMA Status
*/
DWORD USB_DMA_Status (DWORD EPNum) {
DWORD ptr, val;
ptr = UDCA[EPAdr(EPNum)]; /* Current Descriptor */
if (ptr == 0) return (USB_DMA_INVALID);
val = *((DWORD *)(ptr + 3*4)); /* Status Information */
switch ((val >> 1) & 0x0F) {
case 0x00: /* Not serviced */
return (USB_DMA_IDLE);
case 0x01: /* Being serviced */
return (USB_DMA_BUSY);
case 0x02: /* Normal Completition */
return (USB_DMA_DONE);
case 0x03: /* Data Under Run */
return (USB_DMA_UNDER_RUN);
case 0x08: /* Data Over Run */
return (USB_DMA_OVER_RUN);
case 0x09: /* System Error */
return (USB_DMA_ERROR);
}
return (USB_DMA_UNKNOWN);
}
/*
* Get USB DMA Endpoint Current Buffer Address
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: DMA Address (or -1 when DMA is Invalid)
*/
DWORD USB_DMA_BufAdr (DWORD EPNum) {
DWORD ptr, val;
ptr = UDCA[EPAdr(EPNum)]; /* Current Descriptor */
if (ptr == 0) return (-1); /* DMA Invalid */
val = *((DWORD *)(ptr + 2*4)); /* Buffer Address */
return (val); /* Current Address */
}
/*
ARM COMPILER V2.53, usbhw 05/09/06 14:20:49 PAGE 10
* Get USB DMA Endpoint Current Buffer Count
* Number of transfered Bytes or Iso Packets
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: DMA Count (or -1 when DMA is Invalid)
*/
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