573 lines
23 KiB
C
573 lines
23 KiB
C
/* Name: usbdrv.c
|
|
* Project: AVR USB driver
|
|
* Author: Christian Starkjohann
|
|
* Creation Date: 2004-12-29
|
|
* Tabsize: 4
|
|
* Copyright: (c) 2005 by OBJECTIVE DEVELOPMENT Software GmbH
|
|
* License: Proprietary, free under certain conditions. See Documentation.
|
|
* This Revision: $Id: usbdrv.c,v 1.1 2006/09/26 18:18:27 rschaten Exp $
|
|
*/
|
|
|
|
#include "iarcompat.h"
|
|
#ifndef __IAR_SYSTEMS_ICC__
|
|
# include <avr/io.h>
|
|
# include <avr/pgmspace.h>
|
|
#endif
|
|
#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.
|
|
*/
|
|
|
|
#ifndef IAR_SECTION
|
|
#define IAR_SECTION(arg)
|
|
#define __no_init
|
|
#endif
|
|
/* The macro IAR_SECTION is a hack to allow IAR-cc compatibility. On gcc, it
|
|
* is defined to nothing. __no_init is required on IAR.
|
|
*/
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
/* raw USB registers / interface to assembler code: */
|
|
/* usbRxBuf MUST be in 1 byte addressable range (because usbInputBuf is only 1 byte) */
|
|
__no_init uchar usbRxBuf[2][USB_BUFSIZE] __attribute__ ((section (USB_BUFFER_SECTION))) IAR_SECTION(USB_BUFFER_SECTION);/* raw RX buffer: PID, 8 bytes data, 2 bytes CRC */
|
|
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 */
|
|
uchar usbInputBuf; /* ptr to raw buffer used for receiving */
|
|
uchar usbAppBuf; /* ptr to raw buffer passed to app for processing */
|
|
volatile schar usbRxLen; /* = 0; number of bytes in usbAppBuf; 0 means free */
|
|
uchar usbCurrentTok; /* last token received, if more than 1 rx endpoint: MSb=endpoint */
|
|
uchar usbRxToken; /* token for data we received; if more than 1 rx endpoint: MSb=endpoint */
|
|
uchar usbMsgLen = 0xff; /* remaining number of bytes, no msg to send if -1 (see usbMsgPtr) */
|
|
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_CFG_HAVE_INTRIN_ENDPOINT
|
|
volatile uchar usbTxLen1 = USBPID_NAK; /* TX count for endpoint 1 */
|
|
uchar usbTxBuf1[USB_BUFSIZE]; /* TX data for endpoint 1 */
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
|
|
volatile uchar usbTxLen3 = USBPID_NAK; /* TX count for endpoint 1 */
|
|
uchar usbTxBuf3[USB_BUFSIZE]; /* TX data for endpoint 1 */
|
|
#endif
|
|
#endif
|
|
|
|
/* USB status registers / not shared with asm code */
|
|
uchar *usbMsgPtr; /* data to transmit next -- ROM or RAM address */
|
|
static uchar usbMsgFlags; /* flag values see below */
|
|
static uchar usbIsReset; /* = 0; USB bus is in reset phase */
|
|
|
|
#define USB_FLG_TX_PACKET (1<<0)
|
|
/* Leave free 6 bits after TX_PACKET. This way we can increment usbMsgFlags to toggle TX_PACKET */
|
|
#define USB_FLG_MSGPTR_IS_ROM (1<<6)
|
|
#define USB_FLG_USE_DEFAULT_RW (1<<7)
|
|
|
|
/*
|
|
optimizing hints:
|
|
- do not post/pre inc/dec integer values in operations
|
|
- assign value of PRG_RDB() 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
|
|
*/
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#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)
|
|
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)
|
|
PROGMEM int usbDescriptorStringVendor[] = {
|
|
USB_STRING_DESCRIPTOR_HEADER(USB_CFG_VENDOR_NAME_LEN),
|
|
USB_CFG_VENDOR_NAME
|
|
};
|
|
#endif
|
|
|
|
#if USB_CFG_DESCR_PROPS_STRING_DEVICE == 0 && USB_CFG_DEVICE_NAME_LEN
|
|
#undef USB_CFG_DESCR_PROPS_STRING_DEVICE
|
|
#define USB_CFG_DESCR_PROPS_STRING_DEVICE sizeof(usbDescriptorStringDevice)
|
|
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)
|
|
PROGMEM int usbDescriptorStringSerialNumber[] = {
|
|
USB_STRING_DESCRIPTOR_HEADER(USB_CFG_SERIAL_NUMBER_LEN),
|
|
USB_CFG_SERIAL_NUMBER
|
|
};
|
|
#endif
|
|
|
|
#endif /* USB_CFG_DESCR_PROPS_STRINGS == 0 */
|
|
|
|
#if USB_CFG_DESCR_PROPS_DEVICE == 0
|
|
#undef USB_CFG_DESCR_PROPS_DEVICE
|
|
#define USB_CFG_DESCR_PROPS_DEVICE sizeof(usbDescriptorDevice)
|
|
PROGMEM char usbDescriptorDevice[] = { /* USB device descriptor */
|
|
18, /* sizeof(usbDescriptorDevice): length of descriptor in bytes */
|
|
USBDESCR_DEVICE, /* descriptor type */
|
|
0x01, 0x01, /* USB version supported */
|
|
USB_CFG_DEVICE_CLASS,
|
|
USB_CFG_DEVICE_SUBCLASS,
|
|
0, /* protocol */
|
|
8, /* max packet size */
|
|
USB_CFG_VENDOR_ID, /* 2 bytes */
|
|
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_DEVICE != 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
|
|
|
|
#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 + (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
|
|
USBATTR_SELFPOWER, /* attributes */
|
|
#else
|
|
USBATTR_BUSPOWER, /* 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, /* 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 */
|
|
0x81, /* IN endpoint number 1 */
|
|
0x03, /* attrib: Interrupt endpoint */
|
|
8, 0, /* maximum packet size */
|
|
USB_CFG_INTR_POLL_INTERVAL, /* in ms */
|
|
#endif
|
|
};
|
|
#endif
|
|
|
|
/* We don't use prog_int or prog_int16_t for compatibility with various libc
|
|
* versions. Here's an other compatibility hack:
|
|
*/
|
|
#ifndef PRG_RDB
|
|
#define PRG_RDB(addr) pgm_read_byte(addr)
|
|
#endif
|
|
|
|
typedef union{
|
|
unsigned word;
|
|
uchar *ptr;
|
|
uchar bytes[2];
|
|
}converter_t;
|
|
/* We use this union to do type conversions. This is better optimized than
|
|
* type casts in gcc 3.4.3 and much better than using bit shifts to build
|
|
* ints from chars. Byte ordering is not a problem on an 8 bit platform.
|
|
*/
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT
|
|
uchar usbTxPacketCnt1;
|
|
|
|
void usbSetInterrupt(uchar *data, uchar len)
|
|
{
|
|
uchar *p, i;
|
|
|
|
#if USB_CFG_IMPLEMENT_HALT
|
|
if(usbTxLen1 == USBPID_STALL)
|
|
return;
|
|
#endif
|
|
#if 0 /* No runtime checks! Caller is responsible for valid data! */
|
|
if(len > 8) /* interrupt transfers are limited to 8 bytes */
|
|
len = 8;
|
|
#endif
|
|
i = USBPID_DATA1;
|
|
if(usbTxPacketCnt1 & 1)
|
|
i = USBPID_DATA0;
|
|
if(usbTxLen1 & 0x10){ /* packet buffer was empty */
|
|
usbTxPacketCnt1++;
|
|
}else{
|
|
usbTxLen1 = USBPID_NAK; /* avoid sending incomplete interrupt data */
|
|
}
|
|
p = usbTxBuf1;
|
|
*p++ = i;
|
|
for(i=len;i--;)
|
|
*p++ = *data++;
|
|
usbCrc16Append(&usbTxBuf1[1], len);
|
|
usbTxLen1 = len + 4; /* len must be given including sync byte */
|
|
DBG2(0x21, usbTxBuf1, len + 3);
|
|
}
|
|
#endif
|
|
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
|
|
uchar usbTxPacketCnt3;
|
|
|
|
void usbSetInterrupt3(uchar *data, uchar len)
|
|
{
|
|
uchar *p, i;
|
|
|
|
i = USBPID_DATA1;
|
|
if(usbTxPacketCnt3 & 1)
|
|
i = USBPID_DATA0;
|
|
if(usbTxLen3 & 0x10){ /* packet buffer was empty */
|
|
usbTxPacketCnt3++;
|
|
}else{
|
|
usbTxLen3 = USBPID_NAK; /* avoid sending incomplete interrupt data */
|
|
}
|
|
p = usbTxBuf3;
|
|
*p++ = i;
|
|
for(i=len;i--;)
|
|
*p++ = *data++;
|
|
usbCrc16Append(&usbTxBuf3[1], len);
|
|
usbTxLen3 = len + 4; /* len must be given including sync byte */
|
|
DBG2(0x23, usbTxBuf3, len + 3);
|
|
}
|
|
#endif
|
|
|
|
|
|
static uchar usbRead(uchar *data, uchar len)
|
|
{
|
|
#if USB_CFG_IMPLEMENT_FN_READ
|
|
if(usbMsgFlags & USB_FLG_USE_DEFAULT_RW){
|
|
#endif
|
|
uchar i = len, *r = usbMsgPtr;
|
|
if(usbMsgFlags & USB_FLG_MSGPTR_IS_ROM){ /* ROM data */
|
|
while(i--){
|
|
uchar c = PRG_RDB(r); /* assign to char size variable to enforce byte ops */
|
|
*data++ = c;
|
|
r++;
|
|
}
|
|
}else{ /* RAM data */
|
|
while(i--)
|
|
*data++ = *r++;
|
|
}
|
|
usbMsgPtr = r;
|
|
return len;
|
|
#if USB_CFG_IMPLEMENT_FN_READ
|
|
}else{
|
|
if(len != 0) /* don't bother app with 0 sized reads */
|
|
return usbFunctionRead(data, len);
|
|
return 0;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
|
|
#define GET_DESCRIPTOR(cfgProp, staticName) \
|
|
if(cfgProp){ \
|
|
if((cfgProp) & USB_PROP_IS_RAM) \
|
|
flags &= ~USB_FLG_MSGPTR_IS_ROM; \
|
|
if((cfgProp) & USB_PROP_IS_DYNAMIC){ \
|
|
replyLen = usbFunctionDescriptor(rq); \
|
|
}else{ \
|
|
replyData = (uchar *)(staticName); \
|
|
SET_REPLY_LEN((cfgProp) & 0xff); \
|
|
} \
|
|
}
|
|
/* We use if() instead of #if in the macro above because #if can't be used
|
|
* in macros and the compiler optimizes constant conditions anyway.
|
|
*/
|
|
|
|
|
|
/* Don't make this function static to avoid inlining.
|
|
* The entire function would become too large and exceed the range of
|
|
* relative jumps.
|
|
* 2006-02-25: Either gcc 3.4.3 is better than the gcc used when the comment
|
|
* above was written, or other parts of the code have changed. We now get
|
|
* better results with an inlined function. Test condition: PowerSwitch code.
|
|
*/
|
|
static void usbProcessRx(uchar *data, uchar len)
|
|
{
|
|
usbRequest_t *rq = (void *)data;
|
|
uchar replyLen = 0, flags = USB_FLG_USE_DEFAULT_RW;
|
|
/* We use if() cascades because the compare is done byte-wise while switch()
|
|
* is int-based. The if() cascades are therefore more efficient.
|
|
*/
|
|
DBG2(0x10 + ((usbRxToken >> 6) & 3), data, len);
|
|
#if USB_CFG_IMPLEMENT_FN_WRITEOUT
|
|
if(usbRxToken & 0x80){
|
|
usbFunctionWriteOut(data, len);
|
|
return; /* no reply expected, hence no usbMsgPtr, usbMsgFlags, usbMsgLen set */
|
|
}
|
|
if(usbRxToken == (uchar)(USBPID_SETUP & 0x7f)){ /* MSb contains endpoint (== 0) */
|
|
#else
|
|
if(usbRxToken == (uchar)USBPID_SETUP){
|
|
#endif
|
|
if(len == 8){ /* Setup size must be always 8 bytes. Ignore otherwise. */
|
|
uchar type = rq->bmRequestType & USBRQ_TYPE_MASK;
|
|
if(type == USBRQ_TYPE_STANDARD){
|
|
#define SET_REPLY_LEN(len) replyLen = (len); usbMsgPtr = replyData
|
|
/* This macro ensures that replyLen and usbMsgPtr are always set in the same way.
|
|
* That allows optimization of common code in if() branches */
|
|
uchar *replyData = usbTxBuf + 9; /* there is 3 bytes free space at the end of the buffer */
|
|
replyData[0] = 0; /* common to USBRQ_GET_STATUS and USBRQ_GET_INTERFACE */
|
|
if(rq->bRequest == USBRQ_GET_STATUS){ /* 0 */
|
|
uchar __attribute__((__unused__)) recipient = rq->bmRequestType & USBRQ_RCPT_MASK; /* assign arith ops to variables to enforce byte size */
|
|
#if USB_CFG_IS_SELF_POWERED
|
|
if(recipient == USBRQ_RCPT_DEVICE)
|
|
replyData[0] = USB_CFG_IS_SELF_POWERED;
|
|
#endif
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT && USB_CFG_IMPLEMENT_HALT
|
|
if(recipient == USBRQ_RCPT_ENDPOINT && rq->wIndex.bytes[0] == 0x81) /* request status for endpoint 1 */
|
|
replyData[0] = usbTxLen1 == USBPID_STALL;
|
|
#endif
|
|
replyData[1] = 0;
|
|
SET_REPLY_LEN(2);
|
|
}else if(rq->bRequest == USBRQ_SET_ADDRESS){ /* 5 */
|
|
usbNewDeviceAddr = rq->wValue.bytes[0];
|
|
}else if(rq->bRequest == USBRQ_GET_DESCRIPTOR){ /* 6 */
|
|
flags = USB_FLG_MSGPTR_IS_ROM | USB_FLG_USE_DEFAULT_RW;
|
|
if(rq->wValue.bytes[1] == USBDESCR_DEVICE){ /* 1 */
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_DEVICE, usbDescriptorDevice)
|
|
}else if(rq->wValue.bytes[1] == USBDESCR_CONFIG){ /* 2 */
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_CONFIGURATION, usbDescriptorConfiguration)
|
|
}else if(rq->wValue.bytes[1] == USBDESCR_STRING){ /* 3 */
|
|
#if USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC
|
|
if(USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_RAM)
|
|
flags &= ~USB_FLG_MSGPTR_IS_ROM;
|
|
replyLen = usbFunctionDescriptor(rq);
|
|
#else /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
|
|
if(rq->wValue.bytes[0] == 0){ /* descriptor index */
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_0, usbDescriptorString0)
|
|
}else if(rq->wValue.bytes[0] == 1){
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_VENDOR, usbDescriptorStringVendor)
|
|
}else if(rq->wValue.bytes[0] == 2){
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_DEVICE, usbDescriptorStringDevice)
|
|
}else if(rq->wValue.bytes[0] == 3){
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_STRING_SERIAL_NUMBER, usbDescriptorStringSerialNumber)
|
|
}else if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
|
|
replyLen = usbFunctionDescriptor(rq);
|
|
}
|
|
#endif /* USB_CFG_DESCR_PROPS_STRINGS & USB_PROP_IS_DYNAMIC */
|
|
}else if(rq->wValue.bytes[1] == USBDESCR_HID){ /* 0x21 */
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID, usbDescriptorConfiguration + 18)
|
|
}else if(rq->wValue.bytes[1] == USBDESCR_HID_REPORT){ /* 0x22 */
|
|
GET_DESCRIPTOR(USB_CFG_DESCR_PROPS_HID_REPORT, usbDescriptorHidReport)
|
|
}else if(USB_CFG_DESCR_PROPS_UNKNOWN & USB_PROP_IS_DYNAMIC){
|
|
replyLen = usbFunctionDescriptor(rq);
|
|
}
|
|
}else if(rq->bRequest == USBRQ_GET_CONFIGURATION){ /* 8 */
|
|
replyData = &usbConfiguration; /* send current configuration value */
|
|
SET_REPLY_LEN(1);
|
|
}else if(rq->bRequest == USBRQ_SET_CONFIGURATION){ /* 9 */
|
|
usbConfiguration = rq->wValue.bytes[0];
|
|
#if USB_CFG_IMPLEMENT_HALT
|
|
usbTxLen1 = USBPID_NAK;
|
|
#endif
|
|
}else if(rq->bRequest == USBRQ_GET_INTERFACE){ /* 10 */
|
|
SET_REPLY_LEN(1);
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT
|
|
}else if(rq->bRequest == USBRQ_SET_INTERFACE){ /* 11 */
|
|
usbTxPacketCnt1 = 0; /* reset data toggling for interrupt endpoint */
|
|
# if USB_CFG_HAVE_INTRIN_ENDPOINT3
|
|
usbTxPacketCnt3 = 0; /* reset data toggling for interrupt endpoint */
|
|
# endif
|
|
# if USB_CFG_IMPLEMENT_HALT
|
|
usbTxLen1 = USBPID_NAK;
|
|
}else if(rq->bRequest == USBRQ_CLEAR_FEATURE || rq->bRequest == USBRQ_SET_FEATURE){ /* 1|3 */
|
|
if(rq->wValue.bytes[0] == 0 && rq->wIndex.bytes[0] == 0x81){ /* feature 0 == HALT for endpoint == 1 */
|
|
usbTxLen1 = rq->bRequest == USBRQ_CLEAR_FEATURE ? USBPID_NAK : USBPID_STALL;
|
|
usbTxPacketCnt1 = 0; /* reset data toggling for interrupt endpoint */
|
|
# if USB_CFG_HAVE_INTRIN_ENDPOINT3
|
|
usbTxPacketCnt3 = 0; /* reset data toggling for interrupt endpoint */
|
|
# endif
|
|
}
|
|
# endif
|
|
#endif
|
|
}else{
|
|
/* the following requests can be ignored, send default reply */
|
|
/* 1: CLEAR_FEATURE, 3: SET_FEATURE, 7: SET_DESCRIPTOR */
|
|
/* 12: SYNCH_FRAME */
|
|
}
|
|
#undef SET_REPLY_LEN
|
|
}else{ /* not a standard request -- must be vendor or class request */
|
|
replyLen = usbFunctionSetup(data);
|
|
}
|
|
#if USB_CFG_IMPLEMENT_FN_READ || USB_CFG_IMPLEMENT_FN_WRITE
|
|
if(replyLen == 0xff){ /* use user-supplied read/write function */
|
|
if((rq->bmRequestType & USBRQ_DIR_MASK) == USBRQ_DIR_DEVICE_TO_HOST){
|
|
replyLen = rq->wLength.bytes[0]; /* IN transfers only */
|
|
}
|
|
flags &= ~USB_FLG_USE_DEFAULT_RW; /* we have no valid msg, use user supplied read/write functions */
|
|
}else /* The 'else' prevents that we limit a replyLen of 0xff to the maximum transfer len. */
|
|
#endif
|
|
if(!rq->wLength.bytes[1] && replyLen > rq->wLength.bytes[0]) /* limit length to max */
|
|
replyLen = rq->wLength.bytes[0];
|
|
}
|
|
/* make sure that data packets which are sent as ACK to an OUT transfer are always zero sized */
|
|
}else{ /* DATA packet from out request */
|
|
#if USB_CFG_IMPLEMENT_FN_WRITE
|
|
if(!(usbMsgFlags & USB_FLG_USE_DEFAULT_RW)){
|
|
uchar rval = usbFunctionWrite(data, len);
|
|
replyLen = 0xff;
|
|
if(rval == 0xff){ /* an error occurred */
|
|
usbMsgLen = 0xff; /* cancel potentially pending data packet for ACK */
|
|
usbTxLen = USBPID_STALL;
|
|
}else if(rval != 0){ /* This was the final package */
|
|
replyLen = 0; /* answer with a zero-sized data packet */
|
|
}
|
|
flags = 0; /* start with a DATA1 package, stay with user supplied write() function */
|
|
}
|
|
#endif
|
|
}
|
|
usbMsgFlags = flags;
|
|
usbMsgLen = replyLen;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
static void usbBuildTxBlock(void)
|
|
{
|
|
uchar wantLen, len, txLen, token;
|
|
|
|
wantLen = usbMsgLen;
|
|
if(wantLen > 8)
|
|
wantLen = 8;
|
|
usbMsgLen -= wantLen;
|
|
token = USBPID_DATA1;
|
|
if(usbMsgFlags & USB_FLG_TX_PACKET)
|
|
token = USBPID_DATA0;
|
|
usbMsgFlags++;
|
|
len = usbRead(usbTxBuf + 1, wantLen);
|
|
if(len <= 8){ /* valid data packet */
|
|
usbCrc16Append(&usbTxBuf[1], len);
|
|
txLen = len + 4; /* length including sync byte */
|
|
if(len < 8) /* a partial package identifies end of message */
|
|
usbMsgLen = 0xff;
|
|
}else{
|
|
txLen = USBPID_STALL; /* stall the endpoint */
|
|
usbMsgLen = 0xff;
|
|
}
|
|
usbTxBuf[0] = token;
|
|
usbTxLen = txLen;
|
|
DBG2(0x20, usbTxBuf, txLen-1);
|
|
}
|
|
|
|
static inline uchar isNotSE0(void)
|
|
{
|
|
uchar rval;
|
|
/* We want to do
|
|
* return (USBIN & USBMASK);
|
|
* here, but the compiler does int-expansion acrobatics.
|
|
* We can avoid this by assigning to a char-sized variable.
|
|
*/
|
|
rval = USBIN & USBMASK;
|
|
return rval;
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
void usbPoll(void)
|
|
{
|
|
uchar len;
|
|
|
|
if((len = usbRxLen) > 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((uchar *)(unsigned)(usbAppBuf + 1), usbRxLen - 3);
|
|
*/
|
|
len -= 3; /* remove PID and CRC */
|
|
if(len < 128){ /* no overflow */
|
|
converter_t appBuf;
|
|
appBuf.ptr = (uchar *)usbRxBuf;
|
|
appBuf.bytes[0] = usbAppBuf;
|
|
appBuf.bytes[0]++;
|
|
usbProcessRx(appBuf.ptr, 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(usbMsgLen != 0xff){ /* transmit data pending? */
|
|
if(usbTxLen & 0x10) /* transmit system idle */
|
|
usbBuildTxBlock();
|
|
}
|
|
if(isNotSE0()){ /* SE0 state */
|
|
usbIsReset = 0;
|
|
}else{
|
|
/* check whether SE0 lasts for more than 2.5us (3.75 bit times) */
|
|
if(!usbIsReset){
|
|
uchar i;
|
|
for(i=100;i;i--){
|
|
if(isNotSE0())
|
|
goto notUsbReset;
|
|
}
|
|
usbIsReset = 1;
|
|
usbNewDeviceAddr = 0;
|
|
usbDeviceAddr = 0;
|
|
#if USB_CFG_IMPLEMENT_HALT
|
|
usbTxLen1 = USBPID_NAK;
|
|
#if USB_CFG_HAVE_INTRIN_ENDPOINT3
|
|
usbTxLen3 = USBPID_NAK;
|
|
#endif
|
|
#endif
|
|
DBG1(0xff, 0, 0);
|
|
notUsbReset:;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|
|
|
|
void usbInit(void)
|
|
{
|
|
usbInputBuf = (uchar)usbRxBuf[0];
|
|
usbAppBuf = (uchar)usbRxBuf[1];
|
|
#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);
|
|
}
|
|
|
|
/* ------------------------------------------------------------------------- */
|