mirror of
https://github.com/felis/USB_Host_Shield_2.0.git
synced 2024-03-22 11:31:26 +01:00
618 lines
24 KiB
C++
618 lines
24 KiB
C++
/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.
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This software may be distributed and modified under the terms of the GNU
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General Public License version 2 (GPL2) as published by the Free Software
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Foundation and appearing in the file GPL2.TXT included in the packaging of
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this file. Please note that GPL2 Section 2[b] requires that all works based
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on this software must also be made publicly available under the terms of
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the GPL2 ("Copyleft").
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Contact information
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-------------------
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Circuits At Home, LTD
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Web : http://www.circuitsathome.com
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e-mail : support@circuitsathome.com
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*/
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/* USB functions */
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#include "avrpins.h"
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#include "max3421e.h"
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#include "usbhost.h"
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#include "Usb.h"
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#if defined(ARDUINO) && ARDUINO >=100
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#include "Arduino.h"
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#else
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#include <WProgram.h>
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#endif
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static uint8_t usb_error = 0;
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static uint8_t usb_task_state;
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/* constructor */
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USB::USB() : bmHubPre(0) {
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usb_task_state = USB_DETACHED_SUBSTATE_INITIALIZE; //set up state machine
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init();
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}
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/* Initialize data structures */
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void USB::init() {
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devConfigIndex = 0;
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bmHubPre = 0;
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}
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uint8_t USB::getUsbTaskState(void) {
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return ( usb_task_state);
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}
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void USB::setUsbTaskState(uint8_t state) {
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usb_task_state = state;
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}
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EpInfo* USB::getEpInfoEntry(uint8_t addr, uint8_t ep) {
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UsbDevice *p = addrPool.GetUsbDevicePtr(addr);
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if (!p || !p->epinfo)
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return NULL;
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EpInfo *pep = p->epinfo;
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for (uint8_t i = 0; i < p->epcount; i++) {
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if ((pep)->epAddr == ep)
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return pep;
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pep++;
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}
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return NULL;
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}
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/* set device table entry */
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/* each device is different and has different number of endpoints. This function plugs endpoint record structure, defined in application, to devtable */
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uint8_t USB::setEpInfoEntry(uint8_t addr, uint8_t epcount, EpInfo* eprecord_ptr) {
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if (!eprecord_ptr)
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return USB_ERROR_INVALID_ARGUMENT;
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UsbDevice *p = addrPool.GetUsbDevicePtr(addr);
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if (!p)
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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p->address = addr;
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p->epinfo = eprecord_ptr;
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p->epcount = epcount;
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return 0;
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}
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uint8_t USB::SetAddress(uint8_t addr, uint8_t ep, EpInfo **ppep, uint16_t &nak_limit) {
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UsbDevice *p = addrPool.GetUsbDevicePtr(addr);
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if (!p)
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return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
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if (!p->epinfo)
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return USB_ERROR_EPINFO_IS_NULL;
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*ppep = getEpInfoEntry(addr, ep);
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if (!*ppep)
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return USB_ERROR_EP_NOT_FOUND_IN_TBL;
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nak_limit = (0x0001UL << (((*ppep)->bmNakPower > USB_NAK_MAX_POWER) ? USB_NAK_MAX_POWER : (*ppep)->bmNakPower));
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nak_limit--;
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/*
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USBTRACE2("\r\nAddress: ", addr);
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USBTRACE2(" EP: ", ep);
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USBTRACE2(" NAK Power: ",(*ppep)->bmNakPower);
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USBTRACE2(" NAK Limit: ", nak_limit);
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USBTRACE("\r\n");
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*/
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regWr(rPERADDR, addr); //set peripheral address
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uint8_t mode = regRd(rMODE);
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// Set bmLOWSPEED and bmHUBPRE in case of low-speed device, reset them otherwise
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regWr(rMODE, (p->lowspeed) ? mode | bmLOWSPEED | bmHubPre : mode & ~(bmHUBPRE | bmLOWSPEED));
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return 0;
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}
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/* Control transfer. Sets address, endpoint, fills control packet with necessary data, dispatches control packet, and initiates bulk IN transfer, */
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/* depending on request. Actual requests are defined as inlines */
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/* return codes: */
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/* 00 = success */
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/* 01-0f = non-zero HRSLT */
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uint8_t USB::ctrlReq(uint8_t addr, uint8_t ep, uint8_t bmReqType, uint8_t bRequest, uint8_t wValLo, uint8_t wValHi,
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uint16_t wInd, uint16_t total, uint16_t nbytes, uint8_t* dataptr, USBReadParser *p) {
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bool direction = false; //request direction, IN or OUT
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uint8_t rcode;
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SETUP_PKT setup_pkt;
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EpInfo *pep = NULL;
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uint16_t nak_limit;
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rcode = SetAddress(addr, ep, &pep, nak_limit);
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if (rcode)
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return rcode;
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direction = ((bmReqType & 0x80) > 0);
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/* fill in setup packet */
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setup_pkt.ReqType_u.bmRequestType = bmReqType;
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setup_pkt.bRequest = bRequest;
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setup_pkt.wVal_u.wValueLo = wValLo;
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setup_pkt.wVal_u.wValueHi = wValHi;
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setup_pkt.wIndex = wInd;
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setup_pkt.wLength = total;
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bytesWr(rSUDFIFO, 8, (uint8_t*) & setup_pkt); //transfer to setup packet FIFO
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rcode = dispatchPkt(tokSETUP, ep, nak_limit); //dispatch packet
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if (rcode) //return HRSLT if not zero
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return ( rcode);
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if (dataptr != NULL) //data stage, if present
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{
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if (direction) //IN transfer
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{
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uint16_t left = total;
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pep->bmRcvToggle = 1; //bmRCVTOG1;
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while (left) {
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// Bytes read into buffer
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uint16_t read = nbytes;
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//uint16_t read = (left<nbytes) ? left : nbytes;
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rcode = InTransfer(pep, nak_limit, &read, dataptr);
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if (rcode)
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return rcode;
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// Invoke callback function if inTransfer completed successfuly and callback function pointer is specified
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if (!rcode && p)
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((USBReadParser*)p)->Parse(read, dataptr, total - left);
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left -= read;
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if (read < nbytes)
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break;
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}
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} else //OUT transfer
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{
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pep->bmSndToggle = 1; //bmSNDTOG1;
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rcode = OutTransfer(pep, nak_limit, nbytes, dataptr);
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}
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if (rcode) //return error
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return ( rcode);
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}
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// Status stage
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return dispatchPkt((direction) ? tokOUTHS : tokINHS, ep, nak_limit); //GET if direction
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}
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/* IN transfer to arbitrary endpoint. Assumes PERADDR is set. Handles multiple packets if necessary. Transfers 'nbytes' bytes. */
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/* Keep sending INs and writes data to memory area pointed by 'data' */
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/* rcode 0 if no errors. rcode 01-0f is relayed from dispatchPkt(). Rcode f0 means RCVDAVIRQ error,
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fe USB xfer timeout */
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uint8_t USB::inTransfer(uint8_t addr, uint8_t ep, uint16_t *nbytesptr, uint8_t* data) {
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EpInfo *pep = NULL;
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uint16_t nak_limit = 0;
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uint8_t rcode = SetAddress(addr, ep, &pep, nak_limit);
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if (rcode) {
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//printf("SetAddress Failed");
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return rcode;
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}
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return InTransfer(pep, nak_limit, nbytesptr, data);
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}
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uint8_t USB::InTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t *nbytesptr, uint8_t* data) {
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uint8_t rcode = 0;
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uint8_t pktsize;
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uint16_t nbytes = *nbytesptr;
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//printf("Requesting %i bytes ", nbytes);
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uint8_t maxpktsize = pep->maxPktSize;
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*nbytesptr = 0;
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regWr(rHCTL, (pep->bmRcvToggle) ? bmRCVTOG1 : bmRCVTOG0); //set toggle value
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while (1) // use a 'return' to exit this loop
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{
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rcode = dispatchPkt(tokIN, pep->epAddr, nak_limit); //IN packet to EP-'endpoint'. Function takes care of NAKS.
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if (rcode) {
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//printf("Problem! %i\r\n", rcode);
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break; //should be 0, indicating ACK. Else return error code.
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}
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/* check for RCVDAVIRQ and generate error if not present */
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/* the only case when absense of RCVDAVIRQ makes sense is when toggle error occured. Need to add handling for that */
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if ((regRd(rHIRQ) & bmRCVDAVIRQ) == 0) {
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//printf("Problem! NO RCVDAVIRQ!\r\n");
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rcode = 0xf0; //receive error
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break;
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}
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pktsize = regRd(rRCVBC); //number of received bytes
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//printf("Got %i bytes ", pktsize);
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assert(pktsize <= nbytes);
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int16_t mem_left = (int16_t)nbytes - *((int16_t*)nbytesptr);
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if (mem_left < 0)
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mem_left = 0;
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data = bytesRd(rRCVFIFO, ((pktsize > mem_left) ? mem_left : pktsize), data);
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regWr(rHIRQ, bmRCVDAVIRQ); // Clear the IRQ & free the buffer
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*nbytesptr += pktsize; // add this packet's byte count to total transfer length
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/* The transfer is complete under two conditions: */
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/* 1. The device sent a short packet (L.T. maxPacketSize) */
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/* 2. 'nbytes' have been transferred. */
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if ((pktsize < maxpktsize) || (*nbytesptr >= nbytes)) // have we transferred 'nbytes' bytes?
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{
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// Save toggle value
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pep->bmRcvToggle = ((regRd(rHRSL) & bmRCVTOGRD)) ? 1 : 0;
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//printf("\r\n");
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rcode = 0;
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break;
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} // if
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} //while( 1 )
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return ( rcode);
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}
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/* OUT transfer to arbitrary endpoint. Handles multiple packets if necessary. Transfers 'nbytes' bytes. */
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/* Handles NAK bug per Maxim Application Note 4000 for single buffer transfer */
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/* rcode 0 if no errors. rcode 01-0f is relayed from HRSL */
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uint8_t USB::outTransfer(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* data) {
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EpInfo *pep = NULL;
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uint16_t nak_limit;
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uint8_t rcode = SetAddress(addr, ep, &pep, nak_limit);
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if (rcode)
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return rcode;
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return OutTransfer(pep, nak_limit, nbytes, data);
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}
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uint8_t USB::OutTransfer(EpInfo *pep, uint16_t nak_limit, uint16_t nbytes, uint8_t *data) {
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uint8_t rcode = hrSUCCESS, retry_count;
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uint8_t *data_p = data; //local copy of the data pointer
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uint16_t bytes_tosend, nak_count;
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uint16_t bytes_left = nbytes;
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uint8_t maxpktsize = pep->maxPktSize;
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if (maxpktsize < 1 || maxpktsize > 64)
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return USB_ERROR_INVALID_MAX_PKT_SIZE;
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unsigned long timeout = millis() + USB_XFER_TIMEOUT;
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regWr(rHCTL, (pep->bmSndToggle) ? bmSNDTOG1 : bmSNDTOG0); //set toggle value
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while (bytes_left) {
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retry_count = 0;
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nak_count = 0;
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bytes_tosend = (bytes_left >= maxpktsize) ? maxpktsize : bytes_left;
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bytesWr(rSNDFIFO, bytes_tosend, data_p); //filling output FIFO
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regWr(rSNDBC, bytes_tosend); //set number of bytes
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regWr(rHXFR, (tokOUT | pep->epAddr)); //dispatch packet
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while (!(regRd(rHIRQ) & bmHXFRDNIRQ)); //wait for the completion IRQ
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regWr(rHIRQ, bmHXFRDNIRQ); //clear IRQ
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rcode = (regRd(rHRSL) & 0x0f);
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while (rcode && (timeout > millis())) {
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switch (rcode) {
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case hrNAK:
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nak_count++;
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if (nak_limit && (nak_count == nak_limit))
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return ( rcode);
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break;
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case hrTIMEOUT:
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retry_count++;
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if (retry_count == USB_RETRY_LIMIT)
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return ( rcode);
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break;
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default:
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return ( rcode);
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}//switch( rcode
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/* process NAK according to Host out NAK bug */
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regWr(rSNDBC, 0);
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regWr(rSNDFIFO, *data_p);
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regWr(rSNDBC, bytes_tosend);
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regWr(rHXFR, (tokOUT | pep->epAddr)); //dispatch packet
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while (!(regRd(rHIRQ) & bmHXFRDNIRQ)); //wait for the completion IRQ
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regWr(rHIRQ, bmHXFRDNIRQ); //clear IRQ
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rcode = (regRd(rHRSL) & 0x0f);
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}//while( rcode && ....
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bytes_left -= bytes_tosend;
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data_p += bytes_tosend;
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}//while( bytes_left...
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pep->bmSndToggle = (regRd(rHRSL) & bmSNDTOGRD) ? 1 : 0; //bmSNDTOG1 : bmSNDTOG0; //update toggle
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return ( rcode); //should be 0 in all cases
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}
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/* dispatch usb packet. Assumes peripheral address is set and relevant buffer is loaded/empty */
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/* If NAK, tries to re-send up to nak_limit times */
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/* If nak_limit == 0, do not count NAKs, exit after timeout */
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/* If bus timeout, re-sends up to USB_RETRY_LIMIT times */
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/* return codes 0x00-0x0f are HRSLT( 0x00 being success ), 0xff means timeout */
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uint8_t USB::dispatchPkt(uint8_t token, uint8_t ep, uint16_t nak_limit) {
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unsigned long timeout = millis() + USB_XFER_TIMEOUT;
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uint8_t tmpdata;
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uint8_t rcode = hrSUCCESS;
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uint8_t retry_count = 0;
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uint16_t nak_count = 0;
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while (timeout > millis()) {
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regWr(rHXFR, (token | ep)); //launch the transfer
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rcode = USB_ERROR_TRANSFER_TIMEOUT;
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while (millis() < timeout) //wait for transfer completion
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{
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tmpdata = regRd(rHIRQ);
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if (tmpdata & bmHXFRDNIRQ) {
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regWr(rHIRQ, bmHXFRDNIRQ); //clear the interrupt
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rcode = 0x00;
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break;
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}//if( tmpdata & bmHXFRDNIRQ
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}//while ( millis() < timeout
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if (rcode != 0x00) //exit if timeout
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return ( rcode);
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rcode = (regRd(rHRSL) & 0x0f); //analyze transfer result
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switch (rcode) {
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case hrNAK:
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nak_count++;
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if (nak_limit && (nak_count == nak_limit))
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return ( rcode);
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break;
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case hrTIMEOUT:
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retry_count++;
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if (retry_count == USB_RETRY_LIMIT)
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return ( rcode);
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break;
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default:
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return ( rcode);
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}//switch( rcode
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}//while( timeout > millis()
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return ( rcode);
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}
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/* USB main task. Performs enumeration/cleanup */
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void USB::Task(void) //USB state machine
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{
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uint8_t rcode;
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uint8_t tmpdata;
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static unsigned long delay = 0;
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//USB_DEVICE_DESCRIPTOR buf;
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bool lowspeed = false;
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MAX3421E::Task();
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tmpdata = getVbusState();
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/* modify USB task state if Vbus changed */
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switch (tmpdata) {
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case SE1: //illegal state
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usb_task_state = USB_DETACHED_SUBSTATE_ILLEGAL;
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lowspeed = false;
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break;
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case SE0: //disconnected
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if ((usb_task_state & USB_STATE_MASK) != USB_STATE_DETACHED)
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usb_task_state = USB_DETACHED_SUBSTATE_INITIALIZE;
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lowspeed = false;
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break;
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case LSHOST:
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lowspeed = true;
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case FSHOST: //attached
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if ((usb_task_state & USB_STATE_MASK) == USB_STATE_DETACHED) {
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delay = millis() + USB_SETTLE_DELAY;
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usb_task_state = USB_ATTACHED_SUBSTATE_SETTLE;
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}
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break;
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}// switch( tmpdata
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for (uint8_t i = 0; i < USB_NUMDEVICES; i++)
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if (devConfig[i])
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rcode = devConfig[i]->Poll();
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switch (usb_task_state) {
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case USB_DETACHED_SUBSTATE_INITIALIZE:
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init();
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for (uint8_t i = 0; i < USB_NUMDEVICES; i++)
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if (devConfig[i])
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rcode = devConfig[i]->Release();
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usb_task_state = USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE;
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break;
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case USB_DETACHED_SUBSTATE_WAIT_FOR_DEVICE: //just sit here
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break;
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case USB_DETACHED_SUBSTATE_ILLEGAL: //just sit here
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break;
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case USB_ATTACHED_SUBSTATE_SETTLE: //settle time for just attached device
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if (delay < millis())
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usb_task_state = USB_ATTACHED_SUBSTATE_RESET_DEVICE;
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break;
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case USB_ATTACHED_SUBSTATE_RESET_DEVICE:
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regWr(rHCTL, bmBUSRST); //issue bus reset
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usb_task_state = USB_ATTACHED_SUBSTATE_WAIT_RESET_COMPLETE;
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break;
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case USB_ATTACHED_SUBSTATE_WAIT_RESET_COMPLETE:
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if ((regRd(rHCTL) & bmBUSRST) == 0) {
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tmpdata = regRd(rMODE) | bmSOFKAENAB; //start SOF generation
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regWr(rMODE, tmpdata);
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usb_task_state = USB_ATTACHED_SUBSTATE_WAIT_SOF;
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delay = millis() + 20; //20ms wait after reset per USB spec
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}
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break;
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case USB_ATTACHED_SUBSTATE_WAIT_SOF: //todo: change check order
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if (regRd(rHIRQ) & bmFRAMEIRQ) //when first SOF received we can continue
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{
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if (delay < millis()) //20ms passed
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usb_task_state = USB_STATE_CONFIGURING;
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}
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break;
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case USB_STATE_CONFIGURING:
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rcode = Configuring(0, 0, lowspeed);
|
|
|
|
if (rcode) {
|
|
if (rcode != USB_DEV_CONFIG_ERROR_DEVICE_INIT_INCOMPLETE) {
|
|
usb_error = rcode;
|
|
usb_task_state = USB_STATE_ERROR;
|
|
}
|
|
} else
|
|
usb_task_state = USB_STATE_RUNNING;
|
|
break;
|
|
case USB_STATE_RUNNING:
|
|
break;
|
|
case USB_STATE_ERROR:
|
|
break;
|
|
} // switch( usb_task_state )
|
|
}
|
|
|
|
uint8_t USB::DefaultAddressing(uint8_t parent, uint8_t port, bool lowspeed) {
|
|
//uint8_t buf[12];
|
|
uint8_t rcode;
|
|
UsbDevice *p0 = NULL, *p = NULL;
|
|
|
|
// Get pointer to pseudo device with address 0 assigned
|
|
p0 = addrPool.GetUsbDevicePtr(0);
|
|
|
|
if (!p0)
|
|
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
|
|
|
|
if (!p0->epinfo)
|
|
return USB_ERROR_EPINFO_IS_NULL;
|
|
|
|
p0->lowspeed = (lowspeed) ? true : false;
|
|
|
|
// Allocate new address according to device class
|
|
uint8_t bAddress = addrPool.AllocAddress(parent, false, port);
|
|
|
|
if (!bAddress)
|
|
return USB_ERROR_OUT_OF_ADDRESS_SPACE_IN_POOL;
|
|
|
|
p = addrPool.GetUsbDevicePtr(bAddress);
|
|
|
|
if (!p)
|
|
return USB_ERROR_ADDRESS_NOT_FOUND_IN_POOL;
|
|
|
|
p->lowspeed = lowspeed;
|
|
|
|
// Assign new address to the device
|
|
rcode = setAddr(0, 0, bAddress);
|
|
|
|
if (rcode) {
|
|
addrPool.FreeAddress(bAddress);
|
|
bAddress = 0;
|
|
return rcode;
|
|
}
|
|
return 0;
|
|
};
|
|
|
|
uint8_t USB::Configuring(uint8_t parent, uint8_t port, bool lowspeed) {
|
|
//static uint8_t dev_index = 0;
|
|
uint8_t rcode = 0;
|
|
|
|
for (; devConfigIndex < USB_NUMDEVICES; devConfigIndex++) {
|
|
if (!devConfig[devConfigIndex])
|
|
continue;
|
|
|
|
rcode = devConfig[devConfigIndex]->Init(parent, port, lowspeed);
|
|
|
|
if (!rcode) {
|
|
devConfigIndex = 0;
|
|
return 0;
|
|
}
|
|
if (!(rcode == USB_DEV_CONFIG_ERROR_DEVICE_NOT_SUPPORTED || rcode == USB_ERROR_CLASS_INSTANCE_ALREADY_IN_USE)) {
|
|
// in case of an error dev_index should be reset to 0
|
|
// in order to start from the very beginning the
|
|
// next time the program gets here
|
|
if (rcode != USB_DEV_CONFIG_ERROR_DEVICE_INIT_INCOMPLETE)
|
|
devConfigIndex = 0;
|
|
|
|
return rcode;
|
|
}
|
|
}
|
|
// if we get here that means that the device class is not supported by any of registered classes
|
|
devConfigIndex = 0;
|
|
|
|
rcode = DefaultAddressing(parent, port, lowspeed);
|
|
|
|
return rcode;
|
|
}
|
|
|
|
uint8_t USB::ReleaseDevice(uint8_t addr) {
|
|
if (!addr)
|
|
return 0;
|
|
|
|
for (uint8_t i = 0; i < USB_NUMDEVICES; i++)
|
|
if (devConfig[i]->GetAddress() == addr)
|
|
return devConfig[i]->Release();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#if 1 //!defined(USB_METHODS_INLINE)
|
|
//get device descriptor
|
|
|
|
uint8_t USB::getDevDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t* dataptr) {
|
|
return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, 0x00, USB_DESCRIPTOR_DEVICE, 0x0000, nbytes, nbytes, dataptr, NULL));
|
|
}
|
|
//get configuration descriptor
|
|
|
|
uint8_t USB::getConfDescr(uint8_t addr, uint8_t ep, uint16_t nbytes, uint8_t conf, uint8_t* dataptr) {
|
|
return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, conf, USB_DESCRIPTOR_CONFIGURATION, 0x0000, nbytes, nbytes, dataptr, NULL));
|
|
}
|
|
|
|
uint8_t USB::getConfDescr(uint8_t addr, uint8_t ep, uint8_t conf, USBReadParser *p) {
|
|
const uint8_t bufSize = 64;
|
|
uint8_t buf[bufSize];
|
|
|
|
uint8_t ret = getConfDescr(addr, ep, 8, conf, buf);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
uint16_t total = ((USB_CONFIGURATION_DESCRIPTOR*)buf)->wTotalLength;
|
|
|
|
//USBTRACE2("\r\ntotal conf.size:", total);
|
|
|
|
return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, conf, USB_DESCRIPTOR_CONFIGURATION, 0x0000, total, bufSize, buf, p));
|
|
}
|
|
|
|
//get string descriptor
|
|
|
|
uint8_t USB::getStrDescr(uint8_t addr, uint8_t ep, uint16_t ns, uint8_t index, uint16_t langid, uint8_t* dataptr) {
|
|
return ( ctrlReq(addr, ep, bmREQ_GET_DESCR, USB_REQUEST_GET_DESCRIPTOR, index, USB_DESCRIPTOR_STRING, langid, ns, ns, dataptr, NULL));
|
|
}
|
|
//set address
|
|
|
|
uint8_t USB::setAddr(uint8_t oldaddr, uint8_t ep, uint8_t newaddr) {
|
|
return ( ctrlReq(oldaddr, ep, bmREQ_SET, USB_REQUEST_SET_ADDRESS, newaddr, 0x00, 0x0000, 0x0000, 0x0000, NULL, NULL));
|
|
}
|
|
//set configuration
|
|
|
|
uint8_t USB::setConf(uint8_t addr, uint8_t ep, uint8_t conf_value) {
|
|
return ( ctrlReq(addr, ep, bmREQ_SET, USB_REQUEST_SET_CONFIGURATION, conf_value, 0x00, 0x0000, 0x0000, 0x0000, NULL, NULL));
|
|
}
|
|
|
|
#endif // defined(USB_METHODS_INLINE)
|
|
|