📄 usbhw.lst
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297 * Return Value: None
298 */
299
300 void USB_DirCtrlEP (DWORD dir) {
301 1 dir; /* Not needed */
302 1 }
303
304
305 /*
306 * Enable USB Endpoint
307 * Parameters: EPNum: Endpoint Number
308 * EPNum.0..3: Address
309 * EPNum.7: Dir
310 * Return Value: None
311 */
312
313 void USB_EnableEP (DWORD EPNum) {
314 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
315 1 }
316
317
318 /*
319 * Disable USB Endpoint
320 * Parameters: EPNum: Endpoint Number
321 * EPNum.0..3: Address
322 * EPNum.7: Dir
323 * Return Value: None
ARM COMPILER V2.42b, usbhw 02/01/06 23:45:15 PAGE 6
324 */
325
326 void USB_DisableEP (DWORD EPNum) {
327 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_DA));
328 1 }
329
330
331 /*
332 * Reset USB Endpoint
333 * Parameters: EPNum: Endpoint Number
334 * EPNum.0..3: Address
335 * EPNum.7: Dir
336 * Return Value: None
337 */
338
339 void USB_ResetEP (DWORD EPNum) {
340 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
341 1 }
342
343
344 /*
345 * Set Stall for USB Endpoint
346 * Parameters: EPNum: Endpoint Number
347 * EPNum.0..3: Address
348 * EPNum.7: Dir
349 * Return Value: None
350 */
351
352 void USB_SetStallEP (DWORD EPNum) {
353 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(EP_STAT_ST));
354 1 }
355
356
357 /*
358 * Clear Stall for USB Endpoint
359 * Parameters: EPNum: Endpoint Number
360 * EPNum.0..3: Address
361 * EPNum.7: Dir
362 * Return Value: None
363 */
364
365 void USB_ClrStallEP (DWORD EPNum) {
366 1 WrCmdDat(CMD_SET_EP_STAT(EPAdr(EPNum)), DAT_WR_BYTE(0));
367 1 }
368
369
370 /*
371 * Read USB Endpoint Data
372 * Parameters: EPNum: Endpoint Number
373 * EPNum.0..3: Address
374 * EPNum.7: Dir
375 * pData: Pointer to Data Buffer
376 * Return Value: Number of bytes read
377 */
378
379 DWORD USB_ReadEP (DWORD EPNum, BYTE *pData) {
380 1 DWORD cnt, n;
381 1
382 1 USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_RD_EN;
383 1
384 1 do {
385 2 cnt = RX_PLENGTH;
386 2 } while ((cnt & PKT_RDY) == 0);
387 1 cnt &= PKT_LNGTH_MASK;
388 1
389 1 for (n = 0; n < (cnt + 3) / 4; n++) {
ARM COMPILER V2.42b, usbhw 02/01/06 23:45:15 PAGE 7
390 2 *((__packed DWORD *)pData) = RX_DATA;
391 2 pData += 4;
392 2 }
393 1
394 1 USB_CTRL = 0;
395 1
396 1 if (((EP_MSK_ISO >> EPNum) & 1) == 0) { /* Non-Isochronous Endpoint */
397 2 WrCmd(CMD_SEL_EP(EPAdr(EPNum)));
398 2 WrCmd(CMD_CLR_BUF);
399 2 }
400 1
401 1 return (cnt);
402 1 }
403
404
405 /*
406 * Write USB Endpoint Data
407 * Parameters: EPNum: Endpoint Number
408 * EPNum.0..3: Address
409 * EPNum.7: Dir
410 * pData: Pointer to Data Buffer
411 * cnt: Number of bytes to write
412 * Return Value: Number of bytes written
413 */
414
415 DWORD USB_WriteEP (DWORD EPNum, BYTE *pData, DWORD cnt) {
416 1 DWORD n;
417 1
418 1 USB_CTRL = ((EPNum & 0x0F) << 2) | CTRL_WR_EN;
419 1
420 1 TX_PLENGTH = cnt;
421 1
422 1 for (n = 0; n < (cnt + 3) / 4; n++) {
423 2 TX_DATA = *((__packed DWORD *)pData);
424 2 pData += 4;
425 2 }
426 1
427 1 USB_CTRL = 0;
428 1
429 1 WrCmd(CMD_SEL_EP(EPAdr(EPNum)));
430 1 WrCmd(CMD_VALID_BUF);
431 1
432 1 return (cnt);
433 1 }
434
435
436 #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
*/
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 */
ARM COMPILER V2.42b, usbhw 02/01/06 23:45:15 PAGE 8
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
* Parameters: EPNum: Endpoint Number
* EPNum.0..3: Address
* EPNum.7: Dir
* Return Value: None
*/
ARM COMPILER V2.42b, usbhw 02/01/06 23:45:15 PAGE 9
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 */
}
/*
* 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
ARM COMPILER V2.42b, usbhw 02/01/06 23:45:15 PAGE 10
* Return Value: DMA Count (or -1 when DMA is Invalid)
*/
DWORD USB_DMA_BufCnt (DWORD EPNum) {
DWORD ptr, val;
ptr = UDCA[EPAdr(EPNum)]; /* Current Descriptor */
if (ptr == 0) return (-1); /* DMA Invalid */
val = *((DWORD *)(ptr + 3*4)); /* Status Information */
return (val >> 16); /* Current Count */
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