401 lines
9.0 KiB
C
401 lines
9.0 KiB
C
/*
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* avrdude - A Downloader/Uploader for AVR device programmers
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* Copyright (C) 2000-2006 Brian S. Dean <bsd@bsdhome.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* $Id$ */
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#include "ac_cfg.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
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# include "freebsd_ppi.h"
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#elif defined(__linux__)
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# include "linux_ppdev.h"
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#elif defined(__sun__) || defined(__sun) /* Solaris */
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# include "solaris_ecpp.h"
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#endif
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#include "avrdude.h"
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#include "avr.h"
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#include "pindefs.h"
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#include "pgm.h"
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#include "ppi.h"
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#include "bitbang.h"
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#include "par.h"
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#if HAVE_PARPORT
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struct ppipins_t {
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int pin;
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int reg;
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int bit;
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int inverted;
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};
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static struct ppipins_t ppipins[] = {
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{ 1, PPICTRL, 0x01, 1 },
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{ 2, PPIDATA, 0x01, 0 },
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{ 3, PPIDATA, 0x02, 0 },
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{ 4, PPIDATA, 0x04, 0 },
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{ 5, PPIDATA, 0x08, 0 },
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{ 6, PPIDATA, 0x10, 0 },
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{ 7, PPIDATA, 0x20, 0 },
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{ 8, PPIDATA, 0x40, 0 },
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{ 9, PPIDATA, 0x80, 0 },
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{ 10, PPISTATUS, 0x40, 0 },
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{ 11, PPISTATUS, 0x80, 1 },
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{ 12, PPISTATUS, 0x20, 0 },
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{ 13, PPISTATUS, 0x10, 0 },
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{ 14, PPICTRL, 0x02, 1 },
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{ 15, PPISTATUS, 0x08, 0 },
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{ 16, PPICTRL, 0x04, 0 },
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{ 17, PPICTRL, 0x08, 1 }
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};
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#define NPINS (sizeof(ppipins)/sizeof(struct ppipins_t))
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static int par_setpin(PROGRAMMER * pgm, int pin, int value)
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{
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int inverted;
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inverted = pin & PIN_INVERSE;
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pin &= PIN_MASK;
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if (pin < 1 || pin > 17)
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return -1;
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pin--;
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if (ppipins[pin].inverted)
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inverted = !inverted;
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if (inverted)
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value = !value;
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if (value)
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ppi_set(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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else
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ppi_clr(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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if (pgm->ispdelay > 1)
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bitbang_delay(pgm->ispdelay);
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return 0;
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}
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static void par_setmany(PROGRAMMER * pgm, unsigned int pinset, int value)
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{
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int pin;
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for (pin = 1; pin <= 17; pin++) {
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if (pinset & (1 << pin))
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par_setpin(pgm, pin, value);
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}
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}
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static int par_getpin(PROGRAMMER * pgm, int pin)
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{
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int value;
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int inverted;
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inverted = pin & PIN_INVERSE;
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pin &= PIN_MASK;
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if (pin < 1 || pin > 17)
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return -1;
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pin--;
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value = ppi_get(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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if (value)
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value = 1;
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if (ppipins[pin].inverted)
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inverted = !inverted;
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if (inverted)
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value = !value;
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return value;
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}
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static int par_highpulsepin(PROGRAMMER * pgm, int pin)
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{
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int inverted;
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inverted = pin & PIN_INVERSE;
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pin &= PIN_MASK;
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if (pin < 1 || pin > 17)
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return -1;
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pin--;
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if (ppipins[pin].inverted)
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inverted = !inverted;
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if (inverted) {
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ppi_clr(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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if (pgm->ispdelay > 1)
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bitbang_delay(pgm->ispdelay);
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ppi_set(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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if (pgm->ispdelay > 1)
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bitbang_delay(pgm->ispdelay);
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} else {
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ppi_set(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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if (pgm->ispdelay > 1)
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bitbang_delay(pgm->ispdelay);
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ppi_clr(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit);
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if (pgm->ispdelay > 1)
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bitbang_delay(pgm->ispdelay);
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}
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return 0;
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}
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/*
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* apply power to the AVR processor
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*/
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static void par_powerup(PROGRAMMER * pgm)
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{
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par_setmany(pgm, pgm->pinno[PPI_AVR_VCC], 1); /* power up */
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usleep(100000);
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}
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/*
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* remove power from the AVR processor
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*/
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static void par_powerdown(PROGRAMMER * pgm)
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{
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par_setmany(pgm, pgm->pinno[PPI_AVR_VCC], 0); /* power down */
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}
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static void par_disable(PROGRAMMER * pgm)
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{
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par_setmany(pgm, pgm->pinno[PPI_AVR_BUFF], 1); /* turn off */
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}
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static void par_enable(PROGRAMMER * pgm)
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{
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/*
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* Prepare to start talking to the connected device - pull reset low
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* first, delay a few milliseconds, then enable the buffer. This
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* sequence allows the AVR to be reset before the buffer is enabled
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* to avoid a short period of time where the AVR may be driving the
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* programming lines at the same time the programmer tries to. Of
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* course, if a buffer is being used, then the /RESET line from the
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* programmer needs to be directly connected to the AVR /RESET line
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* and not via the buffer chip.
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*/
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par_setpin(pgm, pgm->pinno[PIN_AVR_RESET], 0);
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usleep(1);
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/*
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* enable the 74367 buffer, if connected; this signal is active low
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*/
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par_setmany(pgm, pgm->pinno[PPI_AVR_BUFF], 0);
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}
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static int par_open(PROGRAMMER * pgm, char * port)
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{
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int rc;
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bitbang_check_prerequisites(pgm);
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ppi_open(port, &pgm->fd);
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if (pgm->fd.ifd < 0) {
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fprintf(stderr, "%s: failed to open parallel port \"%s\"\n\n",
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progname, port);
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exit(1);
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}
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/*
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* save pin values, so they can be restored when device is closed
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*/
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rc = ppi_getall(&pgm->fd, PPIDATA);
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if (rc < 0) {
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fprintf(stderr, "%s: error reading status of ppi data port\n", progname);
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return -1;
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}
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pgm->ppidata = rc;
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rc = ppi_getall(&pgm->fd, PPICTRL);
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if (rc < 0) {
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fprintf(stderr, "%s: error reading status of ppi ctrl port\n", progname);
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return -1;
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}
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pgm->ppictrl = rc;
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return 0;
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}
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static void par_close(PROGRAMMER * pgm)
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{
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/*
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* Restore pin values before closing,
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* but ensure that buffers are turned off.
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*/
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ppi_setall(&pgm->fd, PPIDATA, pgm->ppidata);
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ppi_setall(&pgm->fd, PPICTRL, pgm->ppictrl);
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par_setmany(pgm, pgm->pinno[PPI_AVR_BUFF], 1);
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/*
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* Handle exit specs.
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*/
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switch (pgm->exit_reset) {
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case EXIT_RESET_ENABLED:
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par_setpin(pgm, pgm->pinno[PIN_AVR_RESET], 0);
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break;
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case EXIT_RESET_DISABLED:
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par_setpin(pgm, pgm->pinno[PIN_AVR_RESET], 1);
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break;
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case EXIT_RESET_UNSPEC:
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/* Leave it alone. */
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break;
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}
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switch (pgm->exit_datahigh) {
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case EXIT_DATAHIGH_ENABLED:
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ppi_setall(&pgm->fd, PPIDATA, 0xff);
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break;
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case EXIT_DATAHIGH_DISABLED:
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ppi_setall(&pgm->fd, PPIDATA, 0x00);
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break;
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case EXIT_DATAHIGH_UNSPEC:
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/* Leave it alone. */
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break;
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}
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switch (pgm->exit_vcc) {
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case EXIT_VCC_ENABLED:
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par_setmany(pgm, pgm->pinno[PPI_AVR_VCC], 1);
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break;
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case EXIT_VCC_DISABLED:
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par_setmany(pgm, pgm->pinno[PPI_AVR_VCC], 0);
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break;
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case EXIT_VCC_UNSPEC:
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/* Leave it alone. */
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break;
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}
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ppi_close(&pgm->fd);
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pgm->fd.ifd = -1;
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}
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/*
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* parse the -E string
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*/
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static int par_parseexitspecs(PROGRAMMER * pgm, char *s)
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{
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char *cp;
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while ((cp = strtok(s, ","))) {
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if (strcmp(cp, "reset") == 0) {
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pgm->exit_reset = EXIT_RESET_ENABLED;
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}
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else if (strcmp(cp, "noreset") == 0) {
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pgm->exit_reset = EXIT_RESET_DISABLED;
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}
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else if (strcmp(cp, "vcc") == 0) {
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pgm->exit_vcc = EXIT_VCC_ENABLED;
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}
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else if (strcmp(cp, "novcc") == 0) {
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pgm->exit_vcc = EXIT_VCC_DISABLED;
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}
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else if (strcmp(cp, "d_high") == 0) {
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pgm->exit_datahigh = EXIT_DATAHIGH_ENABLED;
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}
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else if (strcmp(cp, "d_low") == 0) {
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pgm->exit_datahigh = EXIT_DATAHIGH_DISABLED;
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}
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else {
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return -1;
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}
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s = 0; /* strtok() should be called with the actual string only once */
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}
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return 0;
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}
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void par_initpgm(PROGRAMMER * pgm)
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{
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strcpy(pgm->type, "PPI");
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pgm->exit_vcc = EXIT_VCC_UNSPEC;
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pgm->exit_reset = EXIT_RESET_UNSPEC;
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pgm->exit_datahigh = EXIT_DATAHIGH_UNSPEC;
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pgm->rdy_led = bitbang_rdy_led;
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pgm->err_led = bitbang_err_led;
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pgm->pgm_led = bitbang_pgm_led;
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pgm->vfy_led = bitbang_vfy_led;
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pgm->initialize = bitbang_initialize;
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pgm->display = pgm_display_generic;
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pgm->enable = par_enable;
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pgm->disable = par_disable;
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pgm->powerup = par_powerup;
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pgm->powerdown = par_powerdown;
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pgm->program_enable = bitbang_program_enable;
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pgm->chip_erase = bitbang_chip_erase;
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pgm->cmd = bitbang_cmd;
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pgm->cmd_tpi = bitbang_cmd_tpi;
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pgm->spi = bitbang_spi;
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pgm->open = par_open;
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pgm->close = par_close;
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pgm->setpin = par_setpin;
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pgm->getpin = par_getpin;
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pgm->highpulsepin = par_highpulsepin;
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pgm->parseexitspecs = par_parseexitspecs;
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pgm->read_byte = avr_read_byte_default;
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pgm->write_byte = avr_write_byte_default;
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}
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#else /* !HAVE_PARPORT */
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void par_initpgm(PROGRAMMER * pgm)
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{
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fprintf(stderr,
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"%s: parallel port access not available in this configuration\n",
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progname);
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}
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#endif /* HAVE_PARPORT */
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const char par_desc[] = "Parallel port bitbanging";
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