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avrdude/avrdude/usbasp.c

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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2006 Thomas Fischl
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id$ */
/*
* Interface to the USBasp programmer.
*
* See http://www.fischl.de/usbasp/
*/
#include "ac_cfg.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <unistd.h>
#include "avr.h"
#include "pgm.h"
#include "usbasp.h"
#ifdef HAVE_LIBUSB
#include <usb.h>
extern int verbose;
extern char * progname;
extern int do_cycles;
static usb_dev_handle *usbhandle;
/*
* wrapper for usb_control_msg call
*/
static int usbasp_transmit(unsigned char receive, unsigned char functionid,
unsigned char send[4], unsigned char * buffer, int buffersize)
{
int nbytes;
nbytes = usb_control_msg(usbhandle,
USB_TYPE_VENDOR | USB_RECIP_DEVICE | (receive << 7),
functionid,
(send[1] << 8) | send[0],
(send[3] << 8) | send[2],
buffer, buffersize,
5000);
if(nbytes < 0){
fprintf(stderr, "%s: error: usbasp_transmit: %s\n", progname, usb_strerror());
exit(1);
}
return nbytes;
}
/*
* Try to open USB device with given VID, PID, vendor and product name
* Parts of this function were taken from an example code by OBJECTIVE
* DEVELOPMENT Software GmbH (www.obdev.at) to meet conditions for
* shared VID/PID
*/
static int usbOpenDevice(usb_dev_handle **device, int vendor,
char *vendorName, int product, char *productName)
{
struct usb_bus *bus;
struct usb_device *dev;
usb_dev_handle *handle = NULL;
int errorCode = USB_ERROR_NOTFOUND;
static int didUsbInit = 0;
if(!didUsbInit){
didUsbInit = 1;
usb_init();
}
usb_find_busses();
usb_find_devices();
for(bus=usb_get_busses(); bus; bus=bus->next){
for(dev=bus->devices; dev; dev=dev->next){
if(dev->descriptor.idVendor == vendor &&
dev->descriptor.idProduct == product){
char string[256];
int len;
/* we need to open the device in order to query strings */
handle = usb_open(dev);
if(!handle){
errorCode = USB_ERROR_ACCESS;
fprintf(stderr,
"%s: Warning: cannot open USB device: %s\n",
progname, usb_strerror());
continue;
}
if(vendorName == NULL && productName == NULL){
/* name does not matter */
break;
}
/* now check whether the names match: */
len = usb_get_string_simple(handle, dev->descriptor.iManufacturer,
string, sizeof(string));
if(len < 0){
errorCode = USB_ERROR_IO;
fprintf(stderr,
"%s: Warning: cannot query manufacturer for device: %s\n",
progname, usb_strerror());
}else{
errorCode = USB_ERROR_NOTFOUND;
if (verbose > 1)
fprintf(stderr,
"%s: seen device from vendor ->%s<-\n",
progname, string);
if(strcmp(string, vendorName) == 0){
len = usb_get_string_simple(handle, dev->descriptor.iProduct,
string, sizeof(string));
if(len < 0){
errorCode = USB_ERROR_IO;
fprintf(stderr,
"%s: Warning: cannot query product for device: %s\n",
progname, usb_strerror());
}else{
errorCode = USB_ERROR_NOTFOUND;
if (verbose > 1)
fprintf(stderr,
"%s: seen product ->%s<-\n",
progname, string);
if(strcmp(string, productName) == 0)
break;
}
}
}
usb_close(handle);
handle = NULL;
}
}
if(handle)
break;
}
if(handle != NULL){
errorCode = 0;
*device = handle;
}
return errorCode;
}
static int usbasp_open(PROGRAMMER * pgm, char * port)
{
usb_init();
if (usbOpenDevice(&usbhandle, USBASP_SHARED_VID, "www.fischl.de",
USBASP_SHARED_PID, "USBasp") != 0) {
/* check if device with old VID/PID is available */
if (usbOpenDevice(&usbhandle, USBASP_OLD_VID, "www.fischl.de",
USBASP_OLD_PID, "USBasp") != 0) {
/* no USBasp found */
fprintf(stderr,
"%s: error: could not find USB device "
"\"USBasp\" with vid=0x%x pid=0x%x\n",
progname, USBASP_SHARED_VID, USBASP_SHARED_PID);
exit(1);
} else {
/* found USBasp with old IDs */
fprintf(stderr,
"%s: Warning: Found USB device \"USBasp\" with "
"old VID/PID! Please update firmware of USBasp!\n",
progname);
}
}
return 0;
}
static void usbasp_close(PROGRAMMER * pgm)
{
unsigned char temp[4];
memset(temp, 0, sizeof(temp));
usbasp_transmit(1, USBASP_FUNC_DISCONNECT, temp, temp, sizeof(temp));
usb_close(usbhandle);
}
static int usbasp_initialize(PROGRAMMER * pgm, AVRPART * p)
{
unsigned char temp[4];
memset(temp, 0, sizeof(temp));
usbasp_transmit(1, USBASP_FUNC_CONNECT, temp, temp, sizeof(temp));
usleep(100000);
pgm->program_enable(pgm, p);
return 0;
}
static void usbasp_disable(PROGRAMMER * pgm)
{
/* Do nothing. */
return;
}
static void usbasp_enable(PROGRAMMER * pgm)
{
/* Do nothing. */
return;
}
static void usbasp_display(PROGRAMMER * pgm, char * p)
{
return;
}
static int usbasp_cmd(PROGRAMMER * pgm, unsigned char cmd[4],
unsigned char res[4])
{
int nbytes =
usbasp_transmit(1, USBASP_FUNC_TRANSMIT, cmd, res, sizeof(res));
if(nbytes != 4){
fprintf(stderr, "%s: error: wrong responds size\n",
progname);
return -1;
}
return 0;
}
static int usbasp_program_enable(PROGRAMMER * pgm, AVRPART * p)
{
unsigned char res[4];
unsigned char cmd[4];
memset(cmd, 0, sizeof(cmd));
memset(res, 0, sizeof(res));
cmd[0] = 0;
int nbytes =
usbasp_transmit(1, USBASP_FUNC_ENABLEPROG, cmd, res, sizeof(res));
if ((nbytes != 1) | (res[0] != 0)) {
fprintf(stderr, "%s: error: programm enable: target doesn't answer. %x \n",
progname, res[0]);
return -1;
}
return 0;
}
static int usbasp_chip_erase(PROGRAMMER * pgm, AVRPART * p)
{
unsigned char cmd[4];
unsigned char res[4];
if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
p->desc);
return -1;
}
memset(cmd, 0, sizeof(cmd));
avr_set_bits(p->op[AVR_OP_CHIP_ERASE], cmd);
pgm->cmd(pgm, cmd, res);
usleep(p->chip_erase_delay);
pgm->initialize(pgm, p);
return 0;
}
static int usbasp_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)
{
int n;
unsigned char cmd[4];
int address = 0;
int wbytes = n_bytes;
int blocksize;
unsigned char * buffer = m->buf;
int function;
if (strcmp(m->desc, "flash") == 0) {
function = USBASP_FUNC_READFLASH;
} else if (strcmp(m->desc, "eeprom") == 0) {
function = USBASP_FUNC_READEEPROM;
} else {
return -2;
}
while (wbytes) {
if (wbytes > USBASP_READBLOCKSIZE) {
blocksize = USBASP_READBLOCKSIZE;
wbytes -= USBASP_READBLOCKSIZE;
} else {
blocksize = wbytes;
wbytes = 0;
}
cmd[0] = address & 0xFF;
cmd[1] = address >> 8;
n = usbasp_transmit(1, function, cmd, buffer, blocksize);
if (n != blocksize) {
fprintf(stderr, "%s: error: wrong reading bytes %x\n",
progname, n);
exit(1);
}
buffer += blocksize;
address += blocksize;
report_progress (address, n_bytes, NULL);
}
return n_bytes;
}
static int usbasp_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
int page_size, int n_bytes)
{
int n;
unsigned char cmd[4];
int address = 0;
int wbytes = n_bytes;
int blocksize;
unsigned char * buffer = m->buf;
unsigned char blockflags = USBASP_BLOCKFLAG_FIRST;
int function;
if (strcmp(m->desc, "flash") == 0) {
function = USBASP_FUNC_WRITEFLASH;
} else if (strcmp(m->desc, "eeprom") == 0) {
function = USBASP_FUNC_WRITEEEPROM;
} else {
return -2;
}
while (wbytes) {
if (wbytes > USBASP_WRITEBLOCKSIZE) {
blocksize = USBASP_WRITEBLOCKSIZE;
wbytes -= USBASP_WRITEBLOCKSIZE;
} else {
blocksize = wbytes;
wbytes = 0;
blockflags |= USBASP_BLOCKFLAG_LAST;
}
cmd[0] = address & 0xFF;
cmd[1] = address >> 8;
cmd[2] = page_size & 0xFF;
cmd[3] = (blockflags & 0x0F) + ((page_size & 0xF00) >> 4); //TP: Mega128 fix
blockflags = 0;
n = usbasp_transmit(0, function, cmd, buffer, blocksize);
if (n != blocksize) {
fprintf(stderr, "%s: error: wrong count at writing %x\n",
progname, n);
exit(1);
}
buffer += blocksize;
address += blocksize;
report_progress (address, n_bytes, NULL);
}
return n_bytes;
}
void usbasp_initpgm(PROGRAMMER * pgm)
{
strcpy(pgm->type, "usbasp");
/*
* mandatory functions
*/
pgm->initialize = usbasp_initialize;
pgm->display = usbasp_display;
pgm->enable = usbasp_enable;
pgm->disable = usbasp_disable;
pgm->program_enable = usbasp_program_enable;
pgm->chip_erase = usbasp_chip_erase;
pgm->cmd = usbasp_cmd;
pgm->open = usbasp_open;
pgm->close = usbasp_close;
pgm->read_byte = avr_read_byte_default;
pgm->write_byte = avr_write_byte_default;
/*
* optional functions
*/
pgm->paged_write = usbasp_paged_write;
pgm->paged_load = usbasp_paged_load;
}
#else /* HAVE_LIBUSB */
extern char * progname;
static int usbasp_nousb_open (struct programmer_t *pgm, char * name)
{
fprintf(stderr, "%s: error: no usb support. please compile again with libusb installed.\n",
progname);
exit(1);
}
void usbasp_initpgm(PROGRAMMER * pgm)
{
strcpy(pgm->type, "usbasp");
pgm->open = usbasp_nousb_open;
}
#endif /* HAVE_LIBUSB */
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