diff options
Diffstat (limited to 'src/avrdude/par.c')
| -rw-r--r-- | src/avrdude/par.c | 411 |
1 files changed, 411 insertions, 0 deletions
diff --git a/src/avrdude/par.c b/src/avrdude/par.c new file mode 100644 index 000000000..9dcb8db84 --- /dev/null +++ b/src/avrdude/par.c @@ -0,0 +1,411 @@ +/* + * avrdude - A Downloader/Uploader for AVR device programmers + * Copyright (C) 2000-2006 Brian S. Dean <bsd@bsdhome.com> + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +/* $Id$ */ + +#include "ac_cfg.h" + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> + +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) +# include "freebsd_ppi.h" +#elif defined(__linux__) +# include "linux_ppdev.h" +#elif defined(__sun__) || defined(__sun) /* Solaris */ +# include "solaris_ecpp.h" +#endif + +#include "avrdude.h" +#include "libavrdude.h" + +#include "ppi.h" +#include "bitbang.h" +#include "par.h" + +#if HAVE_PARPORT + +struct ppipins_t { + int pin; + int reg; + int bit; + int inverted; +}; + +static struct ppipins_t ppipins[] = { + { 1, PPICTRL, 0x01, 1 }, + { 2, PPIDATA, 0x01, 0 }, + { 3, PPIDATA, 0x02, 0 }, + { 4, PPIDATA, 0x04, 0 }, + { 5, PPIDATA, 0x08, 0 }, + { 6, PPIDATA, 0x10, 0 }, + { 7, PPIDATA, 0x20, 0 }, + { 8, PPIDATA, 0x40, 0 }, + { 9, PPIDATA, 0x80, 0 }, + { 10, PPISTATUS, 0x40, 0 }, + { 11, PPISTATUS, 0x80, 1 }, + { 12, PPISTATUS, 0x20, 0 }, + { 13, PPISTATUS, 0x10, 0 }, + { 14, PPICTRL, 0x02, 1 }, + { 15, PPISTATUS, 0x08, 0 }, + { 16, PPICTRL, 0x04, 0 }, + { 17, PPICTRL, 0x08, 1 } +}; + +#define NPINS (sizeof(ppipins)/sizeof(struct ppipins_t)) + +static int par_setpin_internal(PROGRAMMER * pgm, int pin, int value) +{ + int inverted; + + inverted = pin & PIN_INVERSE; + pin &= PIN_MASK; + + if (pin < 1 || pin > 17) + return -1; + + pin--; + + if (ppipins[pin].inverted) + inverted = !inverted; + + if (inverted) + value = !value; + + if (value) + ppi_set(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + else + ppi_clr(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + + if (pgm->ispdelay > 1) + bitbang_delay(pgm->ispdelay); + + return 0; +} + +static int par_setpin(PROGRAMMER * pgm, int pinfunc, int value) +{ + return par_setpin_internal(pgm, pgm->pinno[pinfunc], value); +} + +static void par_setmany(PROGRAMMER * pgm, int pinfunc, int value) +{ + int pin, mask; + int pinset = pgm->pinno[pinfunc]; + + /* mask is anything non-pin - needs to be applied to each par_setpin to preserve inversion */ + mask = pinset & (~PIN_MASK); + + for (pin = 1; pin <= 17; pin++) { + if (pinset & (1 << pin)) + par_setpin_internal(pgm, pin | mask, value); + } +} + +static int par_getpin(PROGRAMMER * pgm, int pinfunc) +{ + int value; + int inverted; + int pin = pgm->pinno[pinfunc]; + + inverted = pin & PIN_INVERSE; + pin &= PIN_MASK; + + if (pin < 1 || pin > 17) + return -1; + + pin--; + + value = ppi_get(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + + if (value) + value = 1; + + if (ppipins[pin].inverted) + inverted = !inverted; + + if (inverted) + value = !value; + + return value; +} + + +static int par_highpulsepin(PROGRAMMER * pgm, int pinfunc) +{ + int inverted; + int pin = pgm->pinno[pinfunc]; + + inverted = pin & PIN_INVERSE; + pin &= PIN_MASK; + + if (pin < 1 || pin > 17) + return -1; + + pin--; + + if (ppipins[pin].inverted) + inverted = !inverted; + + if (inverted) { + ppi_clr(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + if (pgm->ispdelay > 1) + bitbang_delay(pgm->ispdelay); + + ppi_set(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + if (pgm->ispdelay > 1) + bitbang_delay(pgm->ispdelay); + } else { + ppi_set(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + if (pgm->ispdelay > 1) + bitbang_delay(pgm->ispdelay); + + ppi_clr(&pgm->fd, ppipins[pin].reg, ppipins[pin].bit); + if (pgm->ispdelay > 1) + bitbang_delay(pgm->ispdelay); + } + + return 0; +} + +/* + * apply power to the AVR processor + */ +static void par_powerup(PROGRAMMER * pgm) +{ + par_setmany(pgm, PPI_AVR_VCC, 1); /* power up */ + usleep(100000); +} + + +/* + * remove power from the AVR processor + */ +static void par_powerdown(PROGRAMMER * pgm) +{ + par_setmany(pgm, PPI_AVR_VCC, 0); /* power down */ +} + +static void par_disable(PROGRAMMER * pgm) +{ + par_setmany(pgm, PPI_AVR_BUFF, 1); /* turn off */ +} + +static void par_enable(PROGRAMMER * pgm) +{ + /* + * Prepare to start talking to the connected device - pull reset low + * first, delay a few milliseconds, then enable the buffer. This + * sequence allows the AVR to be reset before the buffer is enabled + * to avoid a short period of time where the AVR may be driving the + * programming lines at the same time the programmer tries to. Of + * course, if a buffer is being used, then the /RESET line from the + * programmer needs to be directly connected to the AVR /RESET line + * and not via the buffer chip. + */ + + par_setpin(pgm, PIN_AVR_RESET, 0); + usleep(1); + + /* + * enable the 74367 buffer, if connected; this signal is active low + */ + par_setmany(pgm, PPI_AVR_BUFF, 0); +} + +static int par_open(PROGRAMMER * pgm, char * port) +{ + int rc; + + if (bitbang_check_prerequisites(pgm) < 0) + return -1; + + ppi_open(port, &pgm->fd); + if (pgm->fd.ifd < 0) { + avrdude_message(MSG_INFO, "%s: failed to open parallel port \"%s\"\n\n", + progname, port); + return -1; + } + + /* + * save pin values, so they can be restored when device is closed + */ + rc = ppi_getall(&pgm->fd, PPIDATA); + if (rc < 0) { + avrdude_message(MSG_INFO, "%s: error reading status of ppi data port\n", progname); + return -1; + } + pgm->ppidata = rc; + + rc = ppi_getall(&pgm->fd, PPICTRL); + if (rc < 0) { + avrdude_message(MSG_INFO, "%s: error reading status of ppi ctrl port\n", progname); + return -1; + } + pgm->ppictrl = rc; + + return 0; +} + + +static void par_close(PROGRAMMER * pgm) +{ + + /* + * Restore pin values before closing, + * but ensure that buffers are turned off. + */ + ppi_setall(&pgm->fd, PPIDATA, pgm->ppidata); + ppi_setall(&pgm->fd, PPICTRL, pgm->ppictrl); + + par_setmany(pgm, PPI_AVR_BUFF, 1); + + /* + * Handle exit specs. + */ + switch (pgm->exit_reset) { + case EXIT_RESET_ENABLED: + par_setpin(pgm, PIN_AVR_RESET, 0); + break; + + case EXIT_RESET_DISABLED: + par_setpin(pgm, PIN_AVR_RESET, 1); + break; + + case EXIT_RESET_UNSPEC: + /* Leave it alone. */ + break; + } + + switch (pgm->exit_datahigh) { + case EXIT_DATAHIGH_ENABLED: + ppi_setall(&pgm->fd, PPIDATA, 0xff); + break; + + case EXIT_DATAHIGH_DISABLED: + ppi_setall(&pgm->fd, PPIDATA, 0x00); + break; + + case EXIT_DATAHIGH_UNSPEC: + /* Leave it alone. */ + break; + } + + switch (pgm->exit_vcc) { + case EXIT_VCC_ENABLED: + par_setmany(pgm, PPI_AVR_VCC, 1); + break; + + case EXIT_VCC_DISABLED: + par_setmany(pgm, PPI_AVR_VCC, 0); + break; + + case EXIT_VCC_UNSPEC: + /* Leave it alone. */ + break; + } + + ppi_close(&pgm->fd); + pgm->fd.ifd = -1; +} + +/* + * parse the -E string + */ +static int par_parseexitspecs(PROGRAMMER * pgm, char *s) +{ + char *cp; + + while ((cp = strtok(s, ","))) { + if (strcmp(cp, "reset") == 0) { + pgm->exit_reset = EXIT_RESET_ENABLED; + } + else if (strcmp(cp, "noreset") == 0) { + pgm->exit_reset = EXIT_RESET_DISABLED; + } + else if (strcmp(cp, "vcc") == 0) { + pgm->exit_vcc = EXIT_VCC_ENABLED; + } + else if (strcmp(cp, "novcc") == 0) { + pgm->exit_vcc = EXIT_VCC_DISABLED; + } + else if (strcmp(cp, "d_high") == 0) { + pgm->exit_datahigh = EXIT_DATAHIGH_ENABLED; + } + else if (strcmp(cp, "d_low") == 0) { + pgm->exit_datahigh = EXIT_DATAHIGH_DISABLED; + } + else { + return -1; + } + s = 0; /* strtok() should be called with the actual string only once */ + } + + return 0; +} + +void par_initpgm(PROGRAMMER * pgm) +{ + strcpy(pgm->type, "PPI"); + + pgm_fill_old_pins(pgm); // TODO to be removed if old pin data no longer needed + + pgm->exit_vcc = EXIT_VCC_UNSPEC; + pgm->exit_reset = EXIT_RESET_UNSPEC; + pgm->exit_datahigh = EXIT_DATAHIGH_UNSPEC; + + pgm->rdy_led = bitbang_rdy_led; + pgm->err_led = bitbang_err_led; + pgm->pgm_led = bitbang_pgm_led; + pgm->vfy_led = bitbang_vfy_led; + pgm->initialize = bitbang_initialize; + pgm->display = pgm_display_generic; + pgm->enable = par_enable; + pgm->disable = par_disable; + pgm->powerup = par_powerup; + pgm->powerdown = par_powerdown; + pgm->program_enable = bitbang_program_enable; + pgm->chip_erase = bitbang_chip_erase; + pgm->cmd = bitbang_cmd; + pgm->cmd_tpi = bitbang_cmd_tpi; + pgm->spi = bitbang_spi; + pgm->open = par_open; + pgm->close = par_close; + pgm->setpin = par_setpin; + pgm->getpin = par_getpin; + pgm->highpulsepin = par_highpulsepin; + pgm->parseexitspecs = par_parseexitspecs; + pgm->read_byte = avr_read_byte_default; + pgm->write_byte = avr_write_byte_default; +} + +#else /* !HAVE_PARPORT */ + +void par_initpgm(PROGRAMMER * pgm) +{ + avrdude_message(MSG_INFO, "%s: parallel port access not available in this configuration\n", + progname); +} + +#endif /* HAVE_PARPORT */ + +const char par_desc[] = "Parallel port bitbanging"; |