X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/b8ed9975e55c91abfd274e17d3414a31d53fab08..929b61c6701f8266c855a669d4c7827cbe0d8eb8:/common/usb_cdc.c diff --git a/common/usb_cdc.c b/common/usb_cdc.c index fa26ea7d..acd16b4e 100644 --- a/common/usb_cdc.c +++ b/common/usb_cdc.c @@ -222,28 +222,26 @@ static const char* getStringDescriptor(uint8_t idx) { // Bitmap for all status bits in CSR which must be written as 1 to cause no effect -#define REG_NO_EFFECT_1_ALL AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 \ - |AT91C_UDP_STALLSENT | AT91C_UDP_RXSETUP \ - |AT91C_UDP_TXCOMP +#define REG_NO_EFFECT_1_ALL (AT91C_UDP_RX_DATA_BK0 | AT91C_UDP_RX_DATA_BK1 | AT91C_UDP_STALLSENT | AT91C_UDP_RXSETUP | AT91C_UDP_TXCOMP) // Clear flags in the UDP_CSR register #define UDP_CLEAR_EP_FLAGS(endpoint, flags) { \ volatile unsigned int reg; \ - reg = pUdp->UDP_CSR[(endpoint)]; \ + reg = AT91C_BASE_UDP->UDP_CSR[(endpoint)]; \ reg |= REG_NO_EFFECT_1_ALL; \ reg &= ~(flags); \ - pUdp->UDP_CSR[(endpoint)] = reg; \ + AT91C_BASE_UDP->UDP_CSR[(endpoint)] = reg; \ } // Set flags in the UDP_CSR register #define UDP_SET_EP_FLAGS(endpoint, flags) { \ volatile unsigned int reg; \ - reg = pUdp->UDP_CSR[(endpoint)]; \ + reg = AT91C_BASE_UDP->UDP_CSR[(endpoint)]; \ reg |= REG_NO_EFFECT_1_ALL; \ reg |= (flags); \ - pUdp->UDP_CSR[(endpoint)] = reg; \ + AT91C_BASE_UDP->UDP_CSR[(endpoint)] = reg; \ } @@ -283,19 +281,16 @@ typedef struct { } AT91S_CDC_LINE_CODING, *AT91PS_CDC_LINE_CODING; -AT91S_CDC_LINE_CODING line = { +static AT91S_CDC_LINE_CODING line = { 115200, // baudrate 0, // 1 Stop Bit 0, // None Parity 8}; // 8 Data bits -static void AT91F_CDC_Enumerate(); - -AT91PS_UDP pUdp = AT91C_BASE_UDP; -uint8_t btConfiguration = 0; -uint8_t btConnection = 0; -uint8_t btReceiveBank = AT91C_UDP_RX_DATA_BK0; +static uint8_t btConfiguration = 0; +static uint8_t btConnection = 0; +static uint8_t btReceiveBank = AT91C_UDP_RX_DATA_BK0; //*---------------------------------------------------------------------------- @@ -307,8 +302,8 @@ void usb_disable() { AT91C_BASE_PIOA->PIO_ODR = GPIO_USB_PU; // Clear all lingering interrupts - if (pUdp->UDP_ISR & AT91C_UDP_ENDBUSRES) { - pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES; + if (AT91C_BASE_UDP->UDP_ISR & AT91C_UDP_ENDBUSRES) { + AT91C_BASE_UDP->UDP_ICR = AT91C_UDP_ENDBUSRES; } } @@ -347,128 +342,16 @@ void usb_enable() { //*---------------------------------------------------------------------------- -//* \fn usb_check -//* \brief Test if the device is configured and handle enumeration -//*---------------------------------------------------------------------------- -static bool usb_check() { - AT91_REG isr = pUdp->UDP_ISR; - - if (isr & AT91C_UDP_ENDBUSRES) { - pUdp->UDP_ICR = AT91C_UDP_ENDBUSRES; - // reset all endpoints - pUdp->UDP_RSTEP = (unsigned int)-1; - pUdp->UDP_RSTEP = 0; - // Enable the function - pUdp->UDP_FADDR = AT91C_UDP_FEN; - // Configure endpoint 0 - pUdp->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL); - } else if (isr & AT91C_UDP_EPINT0) { - pUdp->UDP_ICR = AT91C_UDP_EPINT0; - AT91F_CDC_Enumerate(); - } - return (btConfiguration) ? true : false; -} - - -bool usb_poll() { - if (!usb_check()) return false; - return (pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank); -} - - -/** - In github PR #129, some users appears to get a false positive from - usb_poll, which returns true, but the usb_read operation - still returns 0. - This check is basically the same as above, but also checks - that the length available to read is non-zero, thus hopefully fixes the - bug. -**/ -bool usb_poll_validate_length() { - if (!usb_check()) return false; - if (!(pUdp->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false; - return (pUdp->UDP_CSR[AT91C_EP_OUT] >> 16) > 0; -} - - -//*---------------------------------------------------------------------------- -//* \fn usb_read -//* \brief Read available data from Endpoint OUT -//*---------------------------------------------------------------------------- -static uint32_t usb_read(uint8_t* data, size_t len) { - uint8_t bank = btReceiveBank; - uint32_t packetSize, nbBytesRcv = 0; - uint32_t time_out = 0; - - while (len) { - if (!usb_check()) break; - - if ( pUdp->UDP_CSR[AT91C_EP_OUT] & bank ) { - packetSize = MIN(pUdp->UDP_CSR[AT91C_EP_OUT] >> 16, len); - len -= packetSize; - while (packetSize--) - data[nbBytesRcv++] = pUdp->UDP_FDR[AT91C_EP_OUT]; - UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank); - if (bank == AT91C_UDP_RX_DATA_BK0) { - bank = AT91C_UDP_RX_DATA_BK1; - } else { - bank = AT91C_UDP_RX_DATA_BK0; - } - } - if (time_out++ == 0x1fff) break; - } - - btReceiveBank = bank; - return nbBytesRcv; -} - - -//*---------------------------------------------------------------------------- -//* \fn usb_write -//* \brief Send through endpoint 2 +//* \fn AT91F_USB_SendZlp +//* \brief Send zero length packet through an endpoint //*---------------------------------------------------------------------------- -static uint32_t usb_write(const uint8_t* data, const size_t len) { - size_t length = len; - uint32_t cpt = 0; - - if (!length) return 0; - if (!usb_check()) return 0; - - // Send the first packet - cpt = MIN(length, AT91C_EP_IN_SIZE); - length -= cpt; - while (cpt--) { - pUdp->UDP_FDR[AT91C_EP_IN] = *data++; - } - UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY); - - while (length) { - // Fill the next bank - cpt = MIN(length, AT91C_EP_IN_SIZE); - length -= cpt; - while (cpt--) { - pUdp->UDP_FDR[AT91C_EP_IN] = *data++; - } - // Wait for the previous bank to be sent - while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) { - if (!usb_check()) return length; - } - UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP); - while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP) - /* wait */; - UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY); - } - - // Wait for the end of transfer - while (!(pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) { - if (!usb_check()) return length; - } - - UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP); - while (pUdp->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP) +static void AT91F_USB_SendZlp(uint8_t endpoint) { + UDP_SET_EP_FLAGS(endpoint, AT91C_UDP_TXPKTRDY); + while (!(AT91C_BASE_UDP->UDP_CSR[endpoint] & AT91C_UDP_TXCOMP)) + /* wait */; + UDP_CLEAR_EP_FLAGS(endpoint, AT91C_UDP_TXCOMP); + while (AT91C_BASE_UDP->UDP_CSR[endpoint] & AT91C_UDP_TXCOMP) /* wait */; - - return length; } @@ -476,7 +359,7 @@ static uint32_t usb_write(const uint8_t* data, const size_t len) { //* \fn AT91F_USB_SendData //* \brief Send Data through the control endpoint //*---------------------------------------------------------------------------- -static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t length) { +static void AT91F_USB_SendData(const char *pData, uint32_t length) { uint32_t cpt = 0; AT91_REG csr; @@ -485,17 +368,17 @@ static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t leng length -= cpt; while (cpt--) - pUdp->UDP_FDR[0] = *pData++; + AT91C_BASE_UDP->UDP_FDR[0] = *pData++; - if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) { + if (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) { UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP); - while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) + while (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) /* wait */; } UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY); do { - csr = pUdp->UDP_CSR[AT91C_EP_CONTROL]; + csr = AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL]; // Data IN stage has been stopped by a status OUT if (csr & AT91C_UDP_RX_DATA_BK0) { @@ -506,38 +389,24 @@ static void AT91F_USB_SendData(AT91PS_UDP pUdp, const char *pData, uint32_t leng } while (length); - if (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) { + if (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) { UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP); - while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) + while (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) /* wait */; } } -//*---------------------------------------------------------------------------- -//* \fn AT91F_USB_SendZlp -//* \brief Send zero length packet through the control endpoint -//*---------------------------------------------------------------------------- -static void AT91F_USB_SendZlp(AT91PS_UDP pUdp) { - UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXPKTRDY); - while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP)) - /* wait */; - UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_TXCOMP); - while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_TXCOMP) - /* wait */; -} - - //*---------------------------------------------------------------------------- //* \fn AT91F_USB_SendStall //* \brief Stall the control endpoint //*---------------------------------------------------------------------------- -static void AT91F_USB_SendStall(AT91PS_UDP pUdp) { +static void AT91F_USB_SendStall(void) { UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL); - while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR)) + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_ISOERROR)) /* wait */; UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR); - while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR)) + while (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & (AT91C_UDP_FORCESTALL | AT91C_UDP_ISOERROR)) /* wait */; } @@ -550,137 +419,270 @@ static void AT91F_CDC_Enumerate() { uint8_t bmRequestType, bRequest; uint16_t wValue, wIndex, wLength, wStatus; - if (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP)) + if (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP)) return; - bmRequestType = pUdp->UDP_FDR[AT91C_EP_CONTROL]; - bRequest = pUdp->UDP_FDR[AT91C_EP_CONTROL]; - wValue = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF); - wValue |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8); - wIndex = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF); - wIndex |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8); - wLength = (pUdp->UDP_FDR[AT91C_EP_CONTROL] & 0xFF); - wLength |= (pUdp->UDP_FDR[AT91C_EP_CONTROL] << 8); + bmRequestType = AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL]; + bRequest = AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL]; + wValue = (AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL] & 0xFF); + wValue |= (AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL] << 8); + wIndex = (AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL] & 0xFF); + wIndex |= (AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL] << 8); + wLength = (AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL] & 0xFF); + wLength |= (AT91C_BASE_UDP->UDP_FDR[AT91C_EP_CONTROL] << 8); if (bmRequestType & 0x80) { // Data Phase Transfer Direction Device to Host UDP_SET_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_DIR); - while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR)) + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_DIR)) /* wait */; } UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RXSETUP); - while (pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) + while (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RXSETUP) /* wait */; // Handle supported standard device request Cf Table 9-3 in USB specification Rev 1.1 switch ((bRequest << 8) | bmRequestType) { case STD_GET_DESCRIPTOR: if (wValue == 0x100) // Return Device Descriptor - AT91F_USB_SendData(pUdp, devDescriptor, MIN(sizeof(devDescriptor), wLength)); + AT91F_USB_SendData(devDescriptor, MIN(sizeof(devDescriptor), wLength)); else if (wValue == 0x200) // Return Configuration Descriptor - AT91F_USB_SendData(pUdp, cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength)); + AT91F_USB_SendData(cfgDescriptor, MIN(sizeof(cfgDescriptor), wLength)); else if ((wValue & 0xF00) == 0x300) { // Return String Descriptor const char *strDescriptor = getStringDescriptor(wValue & 0xff); if (strDescriptor != NULL) { - AT91F_USB_SendData(pUdp, strDescriptor, MIN(strDescriptor[0], wLength)); + AT91F_USB_SendData(strDescriptor, MIN(strDescriptor[0], wLength)); } else { - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); } } else - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; case STD_SET_ADDRESS: - AT91F_USB_SendZlp(pUdp); - pUdp->UDP_FADDR = (AT91C_UDP_FEN | wValue); - pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0; + AT91F_USB_SendZlp(AT91C_EP_CONTROL); + AT91C_BASE_UDP->UDP_FADDR = (AT91C_UDP_FEN | wValue); + AT91C_BASE_UDP->UDP_GLBSTATE = (wValue) ? AT91C_UDP_FADDEN : 0; break; case STD_SET_CONFIGURATION: btConfiguration = wValue; - AT91F_USB_SendZlp(pUdp); - pUdp->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN; - pUdp->UDP_CSR[AT91C_EP_OUT] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0; - pUdp->UDP_CSR[AT91C_EP_IN] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0; - pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0; + AT91F_USB_SendZlp(AT91C_EP_CONTROL); + AT91C_BASE_UDP->UDP_GLBSTATE = (wValue) ? AT91C_UDP_CONFG : AT91C_UDP_FADDEN; + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT) : 0; + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN) : 0; + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_NOTIFY] = (wValue) ? (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN) : 0; break; case STD_GET_CONFIGURATION: - AT91F_USB_SendData(pUdp, (char *) &(btConfiguration), sizeof(btConfiguration)); + AT91F_USB_SendData((char *) &(btConfiguration), sizeof(btConfiguration)); break; case STD_GET_STATUS_ZERO: wStatus = 0; // Device is Bus powered, remote wakeup disabled - AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus)); + AT91F_USB_SendData((char *) &wStatus, sizeof(wStatus)); break; case STD_GET_STATUS_INTERFACE: wStatus = 0; // reserved for future use - AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus)); + AT91F_USB_SendData((char *) &wStatus, sizeof(wStatus)); break; case STD_GET_STATUS_ENDPOINT: wStatus = 0; wIndex &= 0x0F; - if ((pUdp->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) { - wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1; - AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus)); - } else if ((pUdp->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) { - wStatus = (pUdp->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1; - AT91F_USB_SendData(pUdp, (char *) &wStatus, sizeof(wStatus)); + if ((AT91C_BASE_UDP->UDP_GLBSTATE & AT91C_UDP_CONFG) && (wIndex <= AT91C_EP_NOTIFY)) { + wStatus = (AT91C_BASE_UDP->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1; + AT91F_USB_SendData((char *) &wStatus, sizeof(wStatus)); + } else if ((AT91C_BASE_UDP->UDP_GLBSTATE & AT91C_UDP_FADDEN) && (wIndex == AT91C_EP_CONTROL)) { + wStatus = (AT91C_BASE_UDP->UDP_CSR[wIndex] & AT91C_UDP_EPEDS) ? 0 : 1; + AT91F_USB_SendData((char *) &wStatus, sizeof(wStatus)); } else - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; case STD_SET_FEATURE_ZERO: - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; case STD_SET_FEATURE_INTERFACE: - AT91F_USB_SendZlp(pUdp); + AT91F_USB_SendZlp(AT91C_EP_CONTROL); break; case STD_SET_FEATURE_ENDPOINT: wIndex &= 0x0F; if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) { - pUdp->UDP_CSR[wIndex] = 0; - AT91F_USB_SendZlp(pUdp); + AT91C_BASE_UDP->UDP_CSR[wIndex] = 0; + AT91F_USB_SendZlp(AT91C_EP_CONTROL); } else - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; case STD_CLEAR_FEATURE_ZERO: - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; case STD_CLEAR_FEATURE_INTERFACE: - AT91F_USB_SendZlp(pUdp); + AT91F_USB_SendZlp(AT91C_EP_CONTROL); break; case STD_CLEAR_FEATURE_ENDPOINT: wIndex &= 0x0F; if ((wValue == 0) && (wIndex >= AT91C_EP_OUT) && (wIndex <= AT91C_EP_NOTIFY)) { if (wIndex == AT91C_EP_OUT) - pUdp->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT); + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_OUT); else if (wIndex == AT91C_EP_IN) - pUdp->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN); + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_BULK_IN); else if (wIndex == AT91C_EP_NOTIFY) - pUdp->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN); - AT91F_USB_SendZlp(pUdp); + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_NOTIFY] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_INT_IN); + AT91F_USB_SendZlp(AT91C_EP_CONTROL); } else - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; // handle CDC class requests case SET_LINE_CODING: - while (!(pUdp->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0)) + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] & AT91C_UDP_RX_DATA_BK0)) /* wait */; UDP_CLEAR_EP_FLAGS(AT91C_EP_CONTROL, AT91C_UDP_RX_DATA_BK0); - AT91F_USB_SendZlp(pUdp); + AT91F_USB_SendZlp(AT91C_EP_CONTROL); break; case GET_LINE_CODING: - AT91F_USB_SendData(pUdp, (char *) &line, MIN(sizeof(line), wLength)); + AT91F_USB_SendData((char *) &line, MIN(sizeof(line), wLength)); break; case SET_CONTROL_LINE_STATE: btConnection = wValue; - AT91F_USB_SendZlp(pUdp); + AT91F_USB_SendZlp(AT91C_EP_CONTROL); break; default: - AT91F_USB_SendStall(pUdp); + AT91F_USB_SendStall(); break; } } +//*---------------------------------------------------------------------------- +//* \fn usb_check +//* \brief Test if the device is configured and handle enumeration +//*---------------------------------------------------------------------------- +static bool usb_check() { + AT91_REG isr = AT91C_BASE_UDP->UDP_ISR; + + if (isr & AT91C_UDP_ENDBUSRES) { + AT91C_BASE_UDP->UDP_ICR = AT91C_UDP_ENDBUSRES; + // reset all endpoints + AT91C_BASE_UDP->UDP_RSTEP = (unsigned int)-1; + AT91C_BASE_UDP->UDP_RSTEP = 0; + // Enable the function + AT91C_BASE_UDP->UDP_FADDR = AT91C_UDP_FEN; + // Configure endpoint 0 + AT91C_BASE_UDP->UDP_CSR[AT91C_EP_CONTROL] = (AT91C_UDP_EPEDS | AT91C_UDP_EPTYPE_CTRL); + } else if (isr & AT91C_UDP_EPINT0) { + AT91C_BASE_UDP->UDP_ICR = AT91C_UDP_EPINT0; + AT91F_CDC_Enumerate(); + } + return (btConfiguration) ? true : false; +} + + +bool usb_poll() { + if (!usb_check()) return false; + return (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] & btReceiveBank); +} + + +/** + In github PR #129, some users appears to get a false positive from + usb_poll, which returns true, but the usb_read operation + still returns 0. + This check is basically the same as above, but also checks + that the length available to read is non-zero, thus hopefully fixes the + bug. +**/ +bool usb_poll_validate_length() { + if (!usb_check()) return false; + if (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] & btReceiveBank)) return false; + return (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] >> 16) > 0; +} + + +//*---------------------------------------------------------------------------- +//* \fn usb_read +//* \brief Read available data from Endpoint OUT +//*---------------------------------------------------------------------------- +static uint32_t usb_read(uint8_t* data, size_t len) { + uint8_t bank = btReceiveBank; + uint32_t packetSize, nbBytesRcv = 0; + uint32_t time_out = 0; + + while (len) { + if (!usb_check()) break; + + if ( AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] & bank ) { + packetSize = MIN(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_OUT] >> 16, len); + len -= packetSize; + while (packetSize--) + data[nbBytesRcv++] = AT91C_BASE_UDP->UDP_FDR[AT91C_EP_OUT]; + UDP_CLEAR_EP_FLAGS(AT91C_EP_OUT, bank); + if (bank == AT91C_UDP_RX_DATA_BK0) { + bank = AT91C_UDP_RX_DATA_BK1; + } else { + bank = AT91C_UDP_RX_DATA_BK0; + } + } + if (time_out++ == 0x1fff) break; + } + + btReceiveBank = bank; + return nbBytesRcv; +} + + +//*---------------------------------------------------------------------------- +//* \fn usb_write +//* \brief Send through endpoint 2 +//*---------------------------------------------------------------------------- +static uint32_t usb_write(const uint8_t* data, const size_t len) { + size_t length = len; + uint32_t cpt = 0; + + if (!length) return 0; + if (!usb_check()) return 0; + + // Send the first packet + cpt = MIN(length, AT91C_EP_IN_SIZE); + length -= cpt; + while (cpt--) { + AT91C_BASE_UDP->UDP_FDR[AT91C_EP_IN] = *data++; + } + UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY); + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXPKTRDY)) + /* wait */; + + while (length) { + // Fill the next bank + cpt = MIN(length, AT91C_EP_IN_SIZE); + length -= cpt; + while (cpt--) { + AT91C_BASE_UDP->UDP_FDR[AT91C_EP_IN] = *data++; + } + // Wait for the previous bank to be sent + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) { + if (!usb_check()) return length; + } + UDP_SET_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXPKTRDY); + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXPKTRDY)) + /* wait */; + UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP); + while (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP) + /* wait */; + } + + // Wait for the end of transfer + while (!(AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP)) { + if (!usb_check()) return length; + } + UDP_CLEAR_EP_FLAGS(AT91C_EP_IN, AT91C_UDP_TXCOMP); + while (AT91C_BASE_UDP->UDP_CSR[AT91C_EP_IN] & AT91C_UDP_TXCOMP) + /* wait */; + + if (len % AT91C_EP_IN_SIZE == 0) { // need to send a zero length packet to complete the transfer + AT91F_USB_SendZlp(AT91C_EP_IN); + } + + return length; +} + + //*************************************************************************** // Interface to the main program //*************************************************************************** @@ -752,7 +754,7 @@ bool cmd_send_old(uint16_t cmd, uint32_t arg0, uint32_t arg1, uint32_t arg2, voi txcmd.d.asBytes[i] = ((uint8_t*)data)[i]; } } - + // Send frame and make sure all bytes are transmitted if (usb_write((uint8_t*)&txcmd, sizeof(UsbCommand)) != 0) return false;