diff options
Diffstat (limited to 'tmk_core/protocol/vusb/usbdrv/usbdrv.c')
| -rw-r--r-- | tmk_core/protocol/vusb/usbdrv/usbdrv.c | 622 |
1 files changed, 0 insertions, 622 deletions
diff --git a/tmk_core/protocol/vusb/usbdrv/usbdrv.c b/tmk_core/protocol/vusb/usbdrv/usbdrv.c deleted file mode 100644 index f69198b1b..000000000 --- a/tmk_core/protocol/vusb/usbdrv/usbdrv.c +++ /dev/null @@ -1,622 +0,0 @@ -/* Name: usbdrv.c - * Project: V-USB, virtual USB port for Atmel's(r) AVR(r) microcontrollers - * Author: Christian Starkjohann - * Creation Date: 2004-12-29 - * Tabsize: 4 - * Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH - * License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt) - * This Revision: $Id: usbdrv.c 791 2010-07-15 15:56:13Z cs $ - */ - -#include "usbportability.h" -#include "usbdrv.h" -#include "oddebug.h" - -/* -General Description: -This module implements the C-part of the USB driver. See usbdrv.h for a -documentation of the entire driver. -*/ - -/* ------------------------------------------------------------------------- */ - -/* raw USB registers / interface to assembler code: */ -uchar usbRxBuf[2 * USB_BUFSIZE]; /* raw RX buffer: PID, 8 bytes data, 2 bytes CRC */ -uchar usbInputBufOffset; /* offset in usbRxBuf used for low level receiving */ -uchar usbDeviceAddr; /* assigned during enumeration, defaults to 0 */ -uchar usbNewDeviceAddr; /* device ID which should be set after status phase */ -uchar usbConfiguration; /* currently selected configuration. Administered by driver, but not used */ -volatile schar usbRxLen; /* = 0; number of bytes in usbRxBuf; 0 means free, -1 for flow control */ -uchar usbCurrentTok; /* last token received or endpoint number for last OUT token if != 0 */ -uchar usbRxToken; /* token for data we received; or endpont number for last OUT */ -volatile uchar usbTxLen = USBPID_NAK; /* number of bytes to transmit with next IN token or handshake token */ -uchar usbTxBuf[USB_BUFSIZE]; /* data to transmit with next IN, free if usbTxLen contains handshake token */ -#if USB_COUNT_SOF -volatile uchar usbSofCount; /* incremented by assembler module every SOF */ -#endif -#if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE -usbTxStatus_t usbTxStatus1; -# if USB_CFG_HAVE_INTRIN_ENDPOINT3 -usbTxStatus_t usbTxStatus3; -# endif -#endif -#if USB_CFG_CHECK_DATA_TOGGLING -uchar usbCurrentDataToken; /* when we check data toggling to ignore duplicate packets */ -#endif - -/* USB status registers / not shared with asm code */ -uchar * usbMsgPtr; /* data to transmit next -- ROM or RAM address */ -static usbMsgLen_t usbMsgLen = USB_NO_MSG; /* remaining number of bytes */ -static uchar usbMsgFlags; /* flag values see below */ - -#define USB_FLG_MSGPTR_IS_ROM (1 << 6) -#define USB_FLG_USE_USER_RW (1 << 7) - -/* -optimizing hints: -- do not post/pre inc/dec integer values in operations -- assign value of USB_READ_FLASH() to register variables and don't use side effects in arg -- use narrow scope for variables which should be in X/Y/Z register -- assign char sized expressions to variables to force 8 bit arithmetics -*/ - -/* -------------------------- String Descriptors --------------------------- */ - -#if USB_CFG_DESCR_PROPS_STRINGS == 0 - -# if USB_CFG_DESCR_PROPS_STRING_0 == 0 -# undef USB_CFG_DESCR_PROPS_STRING_0 -# define USB_CFG_DESCR_PROPS_STRING_0 sizeof(usbDescriptorString0) -const PROGMEM char usbDescriptorString0[] = { - /* language descriptor */ - 4, /* sizeof(usbDescriptorString0): length of descriptor in bytes */ - 3, /* descriptor type */ - 0x09, 0x04, /* language index (0x0409 = US-English) */ -}; -# endif - -# if USB_CFG_DESCR_PROPS_STRING_VENDOR == 0 && USB_CFG_VENDOR_NAME_LEN -# undef USB_CFG_DESCR_PROPS_STRING_VENDOR -# define USB_CFG_DESCR_PROPS_STRING_VENDOR sizeof(usbDescriptorStringVendor) -const PROGMEM int usbDescriptorStringVendor[] = {USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN), USB_CFG_VENDOR_NAME}; -# endif - -# if USB_CFG_DESCR_PROPS_STRING_PRODUCT == 0 && USB_CFG_DEVICE_NAME_LEN -# undef USB_CFG_DESCR_PROPS_STRING_PRODUCT -# define USB_CFG_DESCR_PROPS_STRING_PRODUCT sizeof(usbDescriptorStringDevice) -const PROGMEM int usbDescriptorStringDevice[] = {USB_STRING_DESCRIPTOR_HEADER(USB_CFG_DEVICE_NAME_LEN), USB_CFG_DEVICE_NAME}; -# endif - -# if USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER == 0 && USB_CFG_SERIAL_NUMBER_LEN -# undef USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER -# define USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER sizeof(usbDescriptorStringSerialNumber) -const PROGMEM int usbDescriptorStringSerialNumber[] = {USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN), USB_CFG_SERIAL_NUMBER}; -# endif - -#endif /* USB_CFG_DESCR_PROPS_STRINGS == 0 */ - -/* --------------------------- Device Descriptor --------------------------- */ - -#if USB_CFG_DESCR_PROPS_DEVICE == 0 -# undef USB_CFG_DESCR_PROPS_DEVICE -# define USB_CFG_DESCR_PROPS_DEVICE sizeof(usbDescriptorDevice) -const PROGMEM char usbDescriptorDevice[] = { - /* USB device descriptor */ - 18, /* sizeof(usbDescriptorDevice): length of descriptor in bytes */ - USBDESCR_DEVICE, /* descriptor type */ - 0x10, 0x01, /* USB version supported */ - USB_CFG_DEVICE_CLASS, USB_CFG_DEVICE_SUBCLASS, 0, /* protocol */ - 8, /* max packet size */ - /* the following two casts affect the first byte of the constant only, but - * that's sufficient to avoid a warning with the default values. - */ - (char)USB_CFG_VENDOR_ID, /* 2 bytes */ - (char)USB_CFG_DEVICE_ID, /* 2 bytes */ - USB_CFG_DEVICE_VERSION, /* 2 bytes */ - USB_CFG_DESCR_PROPS_STRING_VENDOR != 0 ? 1 : 0, /* manufacturer string index */ - USB_CFG_DESCR_PROPS_STRING_PRODUCT != 0 ? 2 : 0, /* product string index */ - USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER != 0 ? 3 : 0, /* serial number string index */ - 1, /* number of configurations */ -}; -#endif - -/* ----------------------- Configuration Descriptor ------------------------ */ - -#if USB_CFG_DESCR_PROPS_HID_REPORT != 0 && USB_CFG_DESCR_PROPS_HID == 0 -# undef USB_CFG_DESCR_PROPS_HID -# define USB_CFG_DESCR_PROPS_HID 9 /* length of HID descriptor in config descriptor below */ -#endif - -#if USB_CFG_DESCR_PROPS_CONFIGURATION == 0 -# undef USB_CFG_DESCR_PROPS_CONFIGURATION -# define USB_CFG_DESCR_PROPS_CONFIGURATION sizeof(usbDescriptorConfiguration) -PROGMEM char usbDescriptorConfiguration[] = { - /* USB configuration descriptor */ - 9, /* sizeof(usbDescriptorConfiguration): length of descriptor in bytes */ - USBDESCR_CONFIG, /* descriptor type */ - 18 + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT + 7 * USB_CFG_HAVE_INTRIN_ENDPOINT3 + (USB_CFG_DESCR_PROPS_HID & 0xff), 0, - /* total length of data returned (including inlined descriptors) */ - 1, /* number of interfaces in this configuration */ - 1, /* index of this configuration */ - 0, /* configuration name string index */ -# if USB_CFG_IS_SELF_POWERED - (1 << 7) | USBATTR_SELFPOWER, /* attributes */ -# else - (1 << 7), /* attributes */ -# endif - USB_CFG_MAX_BUS_POWER / 2, /* max USB current in 2mA units */ - /* interface descriptor follows inline: */ - 9, /* sizeof(usbDescrInterface): length of descriptor in bytes */ - USBDESCR_INTERFACE, /* descriptor type */ - 0, /* index of this interface */ - 0, /* alternate setting for this interface */ - USB_CFG_HAVE_INTRIN_ENDPOINT + USB_CFG_HAVE_INTRIN_ENDPOINT3, /* endpoints excl 0: number of endpoint descriptors to follow */ - USB_CFG_INTERFACE_CLASS, USB_CFG_INTERFACE_SUBCLASS, USB_CFG_INTERFACE_PROTOCOL, 0, /* string index for interface */ -# if (USB_CFG_DESCR_PROPS_HID & 0xff) /* HID descriptor */ - 9, /* sizeof(usbDescrHID): length of descriptor in bytes */ - USBDESCR_HID, /* descriptor type: HID */ - 0x01, 0x01, /* BCD representation of HID version */ - 0x00, /* target country code */ - 0x01, /* number of HID Report (or other HID class) Descriptor infos to follow */ - 0x22, /* descriptor type: report */ - USB_CFG_HID_REPORT_DESCRIPTOR_LENGTH, 0, /* total length of report descriptor */ -# endif -# if USB_CFG_HAVE_INTRIN_ENDPOINT /* endpoint descriptor for endpoint 1 */ - 7, /* sizeof(usbDescrEndpoint) */ - USBDESCR_ENDPOINT, /* descriptor type = endpoint */ - (char)0x81, /* IN endpoint number 1 */ - 0x03, /* attrib: Interrupt endpoint */ - 8, 0, /* maximum packet size */ - USB_CFG_INTR_POLL_INTERVAL, /* in ms */ -# endif -# if USB_CFG_HAVE_INTRIN_ENDPOINT3 /* endpoint descriptor for endpoint 3 */ - 7, /* sizeof(usbDescrEndpoint) */ - USBDESCR_ENDPOINT, /* descriptor type = endpoint */ - (char)(0x80 | USB_CFG_EP3_NUMBER), /* IN endpoint number 3 */ - 0x03, /* attrib: Interrupt endpoint */ - 8, 0, /* maximum packet size */ - USB_CFG_INTR_POLL_INTERVAL, /* in ms */ -# endif -}; -#endif - -/* ------------------------------------------------------------------------- */ - -static inline void usbResetDataToggling(void) { -#if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE - USB_SET_DATATOKEN1(USB_INITIAL_DATATOKEN); /* reset data toggling for interrupt endpoint */ -# if USB_CFG_HAVE_INTRIN_ENDPOINT3 - USB_SET_DATATOKEN3(USB_INITIAL_DATATOKEN); /* reset data toggling for interrupt endpoint */ -# endif -#endif -} - -static inline void usbResetStall(void) { -#if USB_CFG_IMPLEMENT_HALT && USB_CFG_HAVE_INTRIN_ENDPOINT - usbTxLen1 = USBPID_NAK; -# if USB_CFG_HAVE_INTRIN_ENDPOINT3 - usbTxLen3 = USBPID_NAK; -# endif -#endif -} - -/* ------------------------------------------------------------------------- */ - -#if !USB_CFG_SUPPRESS_INTR_CODE -# if USB_CFG_HAVE_INTRIN_ENDPOINT -static void usbGenericSetInterrupt(uchar *data, uchar len, usbTxStatus_t *txStatus) { - uchar *p; - char i; - -# if USB_CFG_IMPLEMENT_HALT - if (usbTxLen1 == USBPID_STALL) return; -# endif - if (txStatus->len & 0x10) { /* packet buffer was empty */ - txStatus->buffer[0] ^= USBPID_DATA0 ^ USBPID_DATA1; /* toggle token */ - } else { - txStatus->len = USBPID_NAK; /* avoid sending outdated (overwritten) interrupt data */ - } - p = txStatus->buffer + 1; - i = len; - do { /* if len == 0, we still copy 1 byte, but that's no problem */ - *p++ = *data++; - } while (--i > 0); /* loop control at the end is 2 bytes shorter than at beginning */ - usbCrc16Append(&txStatus->buffer[1], len); - txStatus->len = len + 4; /* len must be given including sync byte */ - DBG2(0x21 + (((int)txStatus >> 3) & 3), txStatus->buffer, len + 3); -} - -USB_PUBLIC void usbSetInterrupt(uchar *data, uchar len) { usbGenericSetInterrupt(data, len, &usbTxStatus1); } -# endif - -# if USB_CFG_HAVE_INTRIN_ENDPOINT3 -USB_PUBLIC void usbSetInterrupt3(uchar *data, uchar len) { usbGenericSetInterrupt(data, len, &usbTxStatus3); } -# endif -#endif /* USB_CFG_SUPPRESS_INTR_CODE */ - -/* ------------------ utilities for code following below ------------------- */ - -/* Use defines for the switch statement so that we can choose between an - * if()else if() and a switch/case based implementation. switch() is more - * efficient for a LARGE set of sequential choices, if() is better in all other - * cases. - */ -#if USB_CFG_USE_SWITCH_STATEMENT -# define SWITCH_START(cmd) \ - switch (cmd) { \ - { -# define SWITCH_CASE(value) \ - } \ - break; \ - case (value): { -# define SWITCH_CASE2(v1, v2) \ - } \ - break; \ - case (v1): \ - case (v2): { -# define SWITCH_CASE3(v1, v2, v3) \ - } \ - break; \ - case (v1): \ - case (v2): \ - case (v3): { -# define SWITCH_DEFAULT \ - } \ - break; \ - default: { -# define SWITCH_END \ - } \ - } -#else -# define SWITCH_START(cmd) \ - { \ - uchar _cmd = cmd; \ - if (0) { -# define SWITCH_CASE(value) \ - } \ - else if (_cmd == (value)) { -# define SWITCH_CASE2(v1, v2) \ - } \ - else if (_cmd == (v1) || _cmd == (v2)) { -# define SWITCH_CASE3(v1, v2, v3) \ - } \ - else if (_cmd == (v1) || _cmd == (v2) || (_cmd == v3)) { -# define SWITCH_DEFAULT \ - } \ - else { -# define SWITCH_END \ - } \ - } -#endif - -#ifndef USB_RX_USER_HOOK -# define USB_RX_USER_HOOK(data, len) -#endif -#ifndef USB_SET_ADDRESS_HOOK -# define USB_SET_ADDRESS_HOOK() -#endif - -/* ------------------------------------------------------------------------- */ - -/* We use if() instead of #if in the macro below because #if can't be used - * in macros and the compiler optimizes constant conditions anyway. - * This may cause problems with undefined symbols if compiled without - * optimizing! - */ -#define GET_DESCRIPTOR(cfgProp, staticName) \ - if (cfgProp) { \ - if ((cfgProp)&USB_PROP_IS_RAM) flags = 0; \ - if ((cfgProp)&USB_PROP_IS_DYNAMIC) { \ - len = usbFunctionDescriptor(rq); \ - } else { \ - len = USB_PROP_LENGTH(cfgProp); \ - usbMsgPtr = (uchar *)(staticName); \ - } \ - } - -/* usbDriverDescriptor() is similar to usbFunctionDescriptor(), but used - * internally for all types of descriptors. - */ -static inline usbMsgLen_t usbDriverDescriptor(usbRequest_t *rq) { - usbMsgLen_t len = 0; - uchar flags = USB_FLG_MSGPTR_IS_ROM; - - SWITCH_START(rq->wValue.bytes[1]) - SWITCH_CASE(USBDESCR_DEVICE) /* 1 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice) - SWITCH_CASE(USBDESCR_CONFIG) /* 2 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration) - SWITCH_CASE(USBDESCR_STRING) /* 3 */ -#if USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC - if (USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM) flags = 0; - len = usbFunctionDescriptor(rq); -#else /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */ - SWITCH_START(rq->wValue.bytes[0]) - SWITCH_CASE(0) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0) - SWITCH_CASE(1) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor) - SWITCH_CASE(2) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_PRODUCT, usbDescriptorStringDevice) - SWITCH_CASE(3) - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber) - SWITCH_DEFAULT - if (USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC) { - len = usbFunctionDescriptor(rq); - } - SWITCH_END -#endif /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */ -#if USB_CFG_DESCR_PROPS_HID_REPORT /* only support HID descriptors if enabled */ - SWITCH_CASE(USBDESCR_HID) /* 0x21 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18) - SWITCH_CASE(USBDESCR_HID_REPORT) /* 0x22 */ - GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport) -#endif - SWITCH_DEFAULT - if (USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC) { - len = usbFunctionDescriptor(rq); - } - SWITCH_END - usbMsgFlags = flags; - return len; -} - -/* ------------------------------------------------------------------------- */ - -/* usbDriverSetup() is similar to usbFunctionSetup(), but it's used for - * standard requests instead of class and custom requests. - */ -static inline usbMsgLen_t usbDriverSetup(usbRequest_t *rq) { - uchar len = 0, *dataPtr = usbTxBuf + 9; /* there are 2 bytes free space at the end of the buffer */ - uchar value = rq->wValue.bytes[0]; -#if USB_CFG_IMPLEMENT_HALT - uchar index = rq->wIndex.bytes[0]; -#endif - - dataPtr[0] = 0; /* default reply common to USBRQ_GET_STATUS and USBRQ_GET_INTERFACE */ - SWITCH_START(rq->bRequest) - SWITCH_CASE(USBRQ_GET_STATUS) /* 0 */ - uchar recipient = rq->bmRequestType & USBRQ_RCPT_MASK; /* assign arith ops to variables to enforce byte size */ - if (USB_CFG_IS_SELF_POWERED && recipient == USBRQ_RCPT_DEVICE) dataPtr[0] = USB_CFG_IS_SELF_POWERED; -#if USB_CFG_IMPLEMENT_HALT - if (recipient == USBRQ_RCPT_ENDPOINT && index == 0x81) /* request status for endpoint 1 */ - dataPtr[0] = usbTxLen1 == USBPID_STALL; -#endif - dataPtr[1] = 0; - len = 2; -#if USB_CFG_IMPLEMENT_HALT - SWITCH_CASE2(USBRQ_CLEAR_FEATURE, USBRQ_SET_FEATURE) /* 1, 3 */ - if (value == 0 && index == 0x81) { /* feature 0 == HALT for endpoint == 1 */ - usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL; - usbResetDataToggling(); - } -#endif - SWITCH_CASE(USBRQ_SET_ADDRESS) /* 5 */ - usbNewDeviceAddr = value; - USB_SET_ADDRESS_HOOK(); - SWITCH_CASE(USBRQ_GET_DESCRIPTOR) /* 6 */ - len = usbDriverDescriptor(rq); - goto skipMsgPtrAssignment; - SWITCH_CASE(USBRQ_GET_CONFIGURATION) /* 8 */ - dataPtr = &usbConfiguration; /* send current configuration value */ - len = 1; - SWITCH_CASE(USBRQ_SET_CONFIGURATION) /* 9 */ - usbConfiguration = value; - usbResetStall(); - SWITCH_CASE(USBRQ_GET_INTERFACE) /* 10 */ - len = 1; -#if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE - SWITCH_CASE(USBRQ_SET_INTERFACE) /* 11 */ - usbResetDataToggling(); - usbResetStall(); -#endif - SWITCH_DEFAULT /* 7=SET_DESCRIPTOR, 12=SYNC_FRAME */ - /* Should we add an optional hook here? */ - SWITCH_END usbMsgPtr = dataPtr; -skipMsgPtrAssignment: - return len; -} - -/* ------------------------------------------------------------------------- */ - -/* usbProcessRx() is called for every message received by the interrupt - * routine. It distinguishes between SETUP and DATA packets and processes - * them accordingly. - */ -static inline void usbProcessRx(uchar *data, uchar len) { - usbRequest_t *rq = (void *)data; - - /* usbRxToken can be: - * 0x2d 00101101 (USBPID_SETUP for setup data) - * 0xe1 11100001 (USBPID_OUT: data phase of setup transfer) - * 0...0x0f for OUT on endpoint X - */ - DBG2(0x10 + (usbRxToken & 0xf), data, len + 2); /* SETUP=1d, SETUP-DATA=11, OUTx=1x */ - USB_RX_USER_HOOK(data, len) -#if USB_CFG_IMPLEMENT_FN_WRITEOUT - if (usbRxToken < 0x10) { /* OUT to endpoint != 0: endpoint number in usbRxToken */ - usbFunctionWriteOut(data, len); - return; - } -#endif - if (usbRxToken == (uchar)USBPID_SETUP) { - if (len != 8) /* Setup size must be always 8 bytes. Ignore otherwise. */ - return; - usbMsgLen_t replyLen; - usbTxBuf[0] = USBPID_DATA0; /* initialize data toggling */ - usbTxLen = USBPID_NAK; /* abort pending transmit */ - usbMsgFlags = 0; - uchar type = rq->bmRequestType & USBRQ_TYPE_MASK; - if (type != USBRQ_TYPE_STANDARD) { /* standard requests are handled by driver */ - replyLen = usbFunctionSetup(data); - } else { - replyLen = usbDriverSetup(rq); - } -#if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE - if (replyLen == USB_NO_MSG) { /* use user-supplied read/write function */ - /* do some conditioning on replyLen, but on IN transfers only */ - if ((rq->bmRequestType & USBRQ_DIR_MASK) != USBRQ_DIR_HOST_TO_DEVICE) { - if (sizeof(replyLen) < sizeof(rq->wLength.word)) { /* help compiler with optimizing */ - replyLen = rq->wLength.bytes[0]; - } else { - replyLen = rq->wLength.word; - } - } - usbMsgFlags = USB_FLG_USE_USER_RW; - } else /* The 'else' prevents that we limit a replyLen of USB_NO_MSG to the maximum transfer len. */ -#endif - if (sizeof(replyLen) < sizeof(rq->wLength.word)) { /* help compiler with optimizing */ - if (!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0]) /* limit length to max */ - replyLen = rq->wLength.bytes[0]; - } else { - if (replyLen > rq->wLength.word) /* limit length to max */ - replyLen = rq->wLength.word; - } - usbMsgLen = replyLen; - } else { /* usbRxToken must be USBPID_OUT, which means data phase of setup (control-out) */ -#if USB_CFG_IMPLEMENT_FN_WRITE - if (usbMsgFlags & USB_FLG_USE_USER_RW) { - uchar rval = usbFunctionWrite(data, len); - if (rval == 0xff) { /* an error occurred */ - usbTxLen = USBPID_STALL; - } else if (rval != 0) { /* This was the final package */ - usbMsgLen = 0; /* answer with a zero-sized data packet */ - } - } -#endif - } -} - -/* ------------------------------------------------------------------------- */ - -/* This function is similar to usbFunctionRead(), but it's also called for - * data handled automatically by the driver (e.g. descriptor reads). - */ -static uchar usbDeviceRead(uchar *data, uchar len) { - if (len > 0) { /* don't bother app with 0 sized reads */ -#if USB_CFG_IMPLEMENT_FN_READ - if (usbMsgFlags & USB_FLG_USE_USER_RW) { - len = usbFunctionRead(data, len); - } else -#endif - { - uchar i = len, *r = usbMsgPtr; - if (usbMsgFlags & USB_FLG_MSGPTR_IS_ROM) { /* ROM data */ - do { - uchar c = USB_READ_FLASH(r); /* assign to char size variable to enforce byte ops */ - *data++ = c; - r++; - } while (--i); - } else { /* RAM data */ - do { - *data++ = *r++; - } while (--i); - } - usbMsgPtr = r; - } - } - return len; -} - -/* ------------------------------------------------------------------------- */ - -/* usbBuildTxBlock() is called when we have data to transmit and the - * interrupt routine's transmit buffer is empty. - */ -static inline void usbBuildTxBlock(void) { - usbMsgLen_t wantLen; - uchar len; - - wantLen = usbMsgLen; - if (wantLen > 8) wantLen = 8; - usbMsgLen -= wantLen; - usbTxBuf[0] ^= USBPID_DATA0 ^ USBPID_DATA1; /* DATA toggling */ - len = usbDeviceRead(usbTxBuf + 1, wantLen); - if (len <= 8) { /* valid data packet */ - usbCrc16Append(&usbTxBuf[1], len); - len += 4; /* length including sync byte */ - if (len < 12) /* a partial package identifies end of message */ - usbMsgLen = USB_NO_MSG; - } else { - len = USBPID_STALL; /* stall the endpoint */ - usbMsgLen = USB_NO_MSG; - } - usbTxLen = len; - DBG2(0x20, usbTxBuf, len - 1); -} - -/* ------------------------------------------------------------------------- */ - -static inline void usbHandleResetHook(uchar notResetState) { -#ifdef USB_RESET_HOOK - static uchar wasReset; - uchar isReset = !notResetState; - - if (wasReset != isReset) { - USB_RESET_HOOK(isReset); - wasReset = isReset; - } -#endif -} - -/* ------------------------------------------------------------------------- */ - -USB_PUBLIC void usbPoll(void) { - schar len; - uchar i; - - len = usbRxLen - 3; - if (len >= 0) { - /* We could check CRC16 here -- but ACK has already been sent anyway. If you - * need data integrity checks with this driver, check the CRC in your app - * code and report errors back to the host. Since the ACK was already sent, - * retries must be handled on application level. - * unsigned crc = usbCrc16(buffer + 1, usbRxLen - 3); - */ - usbProcessRx(usbRxBuf + USB_BUFSIZE + 1 - usbInputBufOffset, len); -#if USB_CFG_HAVE_FLOWCONTROL - if (usbRxLen > 0) /* only mark as available if not inactivated */ - usbRxLen = 0; -#else - usbRxLen = 0; /* mark rx buffer as available */ -#endif - } - if (usbTxLen & 0x10) { /* transmit system idle */ - if (usbMsgLen != USB_NO_MSG) { /* transmit data pending? */ - usbBuildTxBlock(); - } - } - for (i = 20; i > 0; i--) { - uchar usbLineStatus = USBIN & USBMASK; - if (usbLineStatus != 0) /* SE0 has ended */ - goto isNotReset; - } - /* RESET condition, called multiple times during reset */ - usbNewDeviceAddr = 0; - usbDeviceAddr = 0; - usbResetStall(); - DBG1(0xff, 0, 0); -isNotReset: - usbHandleResetHook(i); -} - -/* ------------------------------------------------------------------------- */ - -USB_PUBLIC void usbInit(void) { -#if USB_INTR_CFG_SET != 0 - USB_INTR_CFG |= USB_INTR_CFG_SET; -#endif -#if USB_INTR_CFG_CLR != 0 - USB_INTR_CFG &= ~(USB_INTR_CFG_CLR); -#endif - USB_INTR_ENABLE |= (1 << USB_INTR_ENABLE_BIT); - usbResetDataToggling(); -#if USB_CFG_HAVE_INTRIN_ENDPOINT && !USB_CFG_SUPPRESS_INTR_CODE - usbTxLen1 = USBPID_NAK; -# if USB_CFG_HAVE_INTRIN_ENDPOINT3 - usbTxLen3 = USBPID_NAK; -# endif -#endif -} - -/* ------------------------------------------------------------------------- */ |