+// SPDX-License-Identifier: GPL-2.0-or-later
+
/***************************************************************************
* Copyright (C) 2012 by Creative Product Design, marc @ cpdesign.com.au *
- * *
- * 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/>. *
***************************************************************************/
/* 2014-12: Addition of the SWD protocol support is based on the initial work
*
* A gpio is required for tck, tms, tdi and tdo. One or both of srst and trst
* must be also be specified. The required jtag gpios are specified via the
- * sysfsgpio_jtag_nums command or the relevant sysfsgpio_XXX_num commang.
+ * sysfsgpio_jtag_nums command or the relevant sysfsgpio_XXX_num commands.
* The srst and trst gpios are set via the sysfsgpio_srst_num and
* sysfsgpio_trst_num respectively. GPIO numbering follows the kernel
* convention of starting from 0.
#include "config.h"
#endif
+#include <helper/time_support.h>
#include <jtag/interface.h>
+#include <transport/transport.h>
#include "bitbang.h"
/*
* Helper func to determine if gpio number valid
*
- * Assume here that there will be less than 1000 gpios on a system
+ * Assume here that there will be less than 10000 gpios on a system
*/
-static int is_gpio_valid(int gpio)
+static bool is_gpio_valid(int gpio)
{
- return gpio >= 0 && gpio < 1000;
+ return gpio >= 0 && gpio < 10000;
}
/*
*/
static void unexport_sysfs_gpio(int gpio)
{
- char gpiostr[4];
+ char gpiostr[5];
if (!is_gpio_valid(gpio))
return;
snprintf(gpiostr, sizeof(gpiostr), "%d", gpio);
if (open_write_close("/sys/class/gpio/unexport", gpiostr) < 0)
LOG_ERROR("Couldn't unexport gpio %d", gpio);
-
- return;
}
/*
*/
static int setup_sysfs_gpio(int gpio, int is_output, int init_high)
{
+ struct timeval timeout, now;
char buf[40];
- char gpiostr[4];
+ char gpiostr[5];
int ret;
if (!is_gpio_valid(gpio))
LOG_WARNING("gpio %d is already exported", gpio);
} else {
LOG_ERROR("Couldn't export gpio %d", gpio);
- perror("sysfsgpio: ");
+ LOG_ERROR("sysfsgpio: %s", strerror(errno));
return ERROR_FAIL;
}
}
+ gettimeofday(&timeout, NULL);
+ timeval_add_time(&timeout, 0, 500000);
+
snprintf(buf, sizeof(buf), "/sys/class/gpio/gpio%d/direction", gpio);
- ret = open_write_close(buf, is_output ? (init_high ? "high" : "low") : "in");
+ for (;;) {
+ ret = open_write_close(buf, is_output ? (init_high ? "high" : "low") : "in");
+ if (ret >= 0 || errno != EACCES)
+ break;
+ gettimeofday(&now, NULL);
+ if (timeval_compare(&now, &timeout) >= 0)
+ break;
+ jtag_sleep(10000);
+ }
if (ret < 0) {
LOG_ERROR("Couldn't set direction for gpio %d", gpio);
- perror("sysfsgpio: ");
+ LOG_ERROR("sysfsgpio: %s", strerror(errno));
unexport_sysfs_gpio(gpio);
return ERROR_FAIL;
}
snprintf(buf, sizeof(buf), "/sys/class/gpio/gpio%d/value", gpio);
- ret = open(buf, O_RDWR | O_NONBLOCK | O_SYNC);
+ for (;;) {
+ ret = open(buf, O_RDWR | O_NONBLOCK | O_SYNC);
+ if (ret >= 0 || errno != EACCES)
+ break;
+ gettimeofday(&now, NULL);
+ if (timeval_compare(&now, &timeout) >= 0)
+ break;
+ jtag_sleep(10000);
+ }
if (ret < 0) {
LOG_ERROR("Couldn't open value for gpio %d", gpio);
- perror("sysfsgpio: ");
+ LOG_ERROR("sysfsgpio: %s", strerror(errno));
unexport_sysfs_gpio(gpio);
}
ret = open_write_close(buf, is_output ? "high" : "in");
if (ret < 0) {
LOG_ERROR("Couldn't set direction for gpio %d", swdio_gpio);
- perror("sysfsgpio: ");
+ LOG_ERROR("sysfsgpio: %s", strerror(errno));
}
last_stored = false;
return buf[0] != '0';
}
-static void sysfsgpio_swdio_write(int swclk, int swdio)
+static int sysfsgpio_swd_write(int swclk, int swdio)
{
const char one[] = "1";
const char zero[] = "0";
last_swdio = swdio;
last_swclk = swclk;
last_stored = true;
+
+ return ERROR_OK;
}
/*
* The sysfs value will read back either '0' or '1'. The trick here is to call
* lseek to bypass buffering in the sysfs kernel driver.
*/
-static int sysfsgpio_read(void)
+static bb_value_t sysfsgpio_read(void)
{
char buf[1];
return 0;
}
- return buf[0] != '0';
+ return buf[0] == '0' ? BB_LOW : BB_HIGH;
}
/*
* Seeing as this is the only function where the outputs are changed,
* we can cache the old value to avoid needlessly writing it.
*/
-static void sysfsgpio_write(int tck, int tms, int tdi)
+static int sysfsgpio_write(int tck, int tms, int tdi)
{
- if (swd_mode) {
- sysfsgpio_swdio_write(tck, tdi);
- return;
- }
-
const char one[] = "1";
const char zero[] = "0";
last_tdi = tdi;
last_tms = tms;
last_tck = tck;
+
+ return ERROR_OK;
}
/*
*
* (1) assert or (0) deassert reset lines
*/
-static void sysfsgpio_reset(int trst, int srst)
+static int sysfsgpio_reset(int trst, int srst)
{
LOG_DEBUG("sysfsgpio_reset");
const char one[] = "1";
if (bytes_written != 1)
LOG_WARNING("writing trst failed");
}
+
+ return ERROR_OK;
}
COMMAND_HANDLER(sysfsgpio_handle_jtag_gpionums)
return ERROR_COMMAND_SYNTAX_ERROR;
}
- command_print(CMD_CTX,
+ command_print(CMD,
"SysfsGPIO nums: tck = %d, tms = %d, tdi = %d, tdo = %d",
tck_gpio, tms_gpio, tdi_gpio, tdo_gpio);
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tck_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: tck = %d", tck_gpio);
+ command_print(CMD, "SysfsGPIO num: tck = %d", tck_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tms_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: tms = %d", tms_gpio);
+ command_print(CMD, "SysfsGPIO num: tms = %d", tms_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tdo_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: tdo = %d", tdo_gpio);
+ command_print(CMD, "SysfsGPIO num: tdo = %d", tdo_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], tdi_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: tdi = %d", tdi_gpio);
+ command_print(CMD, "SysfsGPIO num: tdi = %d", tdi_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], srst_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: srst = %d", srst_gpio);
+ command_print(CMD, "SysfsGPIO num: srst = %d", srst_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], trst_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: trst = %d", trst_gpio);
+ command_print(CMD, "SysfsGPIO num: trst = %d", trst_gpio);
return ERROR_OK;
}
return ERROR_COMMAND_SYNTAX_ERROR;
}
- command_print(CMD_CTX,
+ command_print(CMD,
"SysfsGPIO nums: swclk = %d, swdio = %d",
swclk_gpio, swdio_gpio);
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], swclk_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: swclk = %d", swclk_gpio);
+ command_print(CMD, "SysfsGPIO num: swclk = %d", swclk_gpio);
return ERROR_OK;
}
if (CMD_ARGC == 1)
COMMAND_PARSE_NUMBER(int, CMD_ARGV[0], swdio_gpio);
- command_print(CMD_CTX, "SysfsGPIO num: swdio = %d", swdio_gpio);
+ command_print(CMD, "SysfsGPIO num: swdio = %d", swdio_gpio);
return ERROR_OK;
}
-static const struct command_registration sysfsgpio_command_handlers[] = {
+static const struct command_registration sysfsgpio_subcommand_handlers[] = {
{
- .name = "sysfsgpio_jtag_nums",
+ .name = "jtag_nums",
.handler = &sysfsgpio_handle_jtag_gpionums,
.mode = COMMAND_CONFIG,
.help = "gpio numbers for tck, tms, tdi, tdo. (in that order)",
- .usage = "(tck tms tdi tdo)* ",
+ .usage = "[tck tms tdi tdo]",
},
{
- .name = "sysfsgpio_tck_num",
+ .name = "tck_num",
.handler = &sysfsgpio_handle_jtag_gpionum_tck,
.mode = COMMAND_CONFIG,
.help = "gpio number for tck.",
+ .usage = "[tck]",
},
{
- .name = "sysfsgpio_tms_num",
+ .name = "tms_num",
.handler = &sysfsgpio_handle_jtag_gpionum_tms,
.mode = COMMAND_CONFIG,
.help = "gpio number for tms.",
+ .usage = "[tms]",
},
{
- .name = "sysfsgpio_tdo_num",
+ .name = "tdo_num",
.handler = &sysfsgpio_handle_jtag_gpionum_tdo,
.mode = COMMAND_CONFIG,
.help = "gpio number for tdo.",
+ .usage = "[tdo]",
},
{
- .name = "sysfsgpio_tdi_num",
+ .name = "tdi_num",
.handler = &sysfsgpio_handle_jtag_gpionum_tdi,
.mode = COMMAND_CONFIG,
.help = "gpio number for tdi.",
+ .usage = "[tdi]",
},
{
- .name = "sysfsgpio_srst_num",
+ .name = "srst_num",
.handler = &sysfsgpio_handle_jtag_gpionum_srst,
.mode = COMMAND_CONFIG,
.help = "gpio number for srst.",
+ .usage = "[srst]",
},
{
- .name = "sysfsgpio_trst_num",
+ .name = "trst_num",
.handler = &sysfsgpio_handle_jtag_gpionum_trst,
.mode = COMMAND_CONFIG,
.help = "gpio number for trst.",
+ .usage = "[trst]",
},
{
- .name = "sysfsgpio_swd_nums",
+ .name = "swd_nums",
.handler = &sysfsgpio_handle_swd_gpionums,
.mode = COMMAND_CONFIG,
.help = "gpio numbers for swclk, swdio. (in that order)",
- .usage = "(swclk swdio)* ",
+ .usage = "[swclk swdio]",
},
{
- .name = "sysfsgpio_swclk_num",
+ .name = "swclk_num",
.handler = &sysfsgpio_handle_swd_gpionum_swclk,
.mode = COMMAND_CONFIG,
.help = "gpio number for swclk.",
+ .usage = "[swclk]",
},
{
- .name = "sysfsgpio_swdio_num",
+ .name = "swdio_num",
.handler = &sysfsgpio_handle_swd_gpionum_swdio,
.mode = COMMAND_CONFIG,
.help = "gpio number for swdio.",
+ .usage = "[swdio]",
+ },
+ COMMAND_REGISTRATION_DONE
+};
+
+static const struct command_registration sysfsgpio_command_handlers[] = {
+ {
+ .name = "sysfsgpio",
+ .mode = COMMAND_ANY,
+ .help = "perform sysfsgpio management",
+ .chain = sysfsgpio_subcommand_handlers,
+ .usage = "",
},
COMMAND_REGISTRATION_DONE
};
static const char * const sysfsgpio_transports[] = { "jtag", "swd", NULL };
-struct jtag_interface sysfsgpio_interface = {
- .name = "sysfsgpio",
+static struct jtag_interface sysfsgpio_interface = {
.supported = DEBUG_CAP_TMS_SEQ,
.execute_queue = bitbang_execute_queue,
+};
+
+struct adapter_driver sysfsgpio_adapter_driver = {
+ .name = "sysfsgpio",
.transports = sysfsgpio_transports,
- .swd = &bitbang_swd,
.commands = sysfsgpio_command_handlers,
+
.init = sysfsgpio_init,
.quit = sysfsgpio_quit,
+ .reset = sysfsgpio_reset,
+
+ .jtag_ops = &sysfsgpio_interface,
+ .swd_ops = &bitbang_swd,
};
static struct bitbang_interface sysfsgpio_bitbang = {
.read = sysfsgpio_read,
.write = sysfsgpio_write,
- .reset = sysfsgpio_reset,
.swdio_read = sysfsgpio_swdio_read,
.swdio_drive = sysfsgpio_swdio_drive,
+ .swd_write = sysfsgpio_swd_write,
.blink = 0
};
static void cleanup_all_fds(void)
{
- cleanup_fd(tck_fd, tck_gpio);
- cleanup_fd(tms_fd, tms_gpio);
- cleanup_fd(tdi_fd, tdi_gpio);
- cleanup_fd(tdo_fd, tdo_gpio);
- cleanup_fd(trst_fd, trst_gpio);
+ if (transport_is_jtag()) {
+ cleanup_fd(tck_fd, tck_gpio);
+ cleanup_fd(tms_fd, tms_gpio);
+ cleanup_fd(tdi_fd, tdi_gpio);
+ cleanup_fd(tdo_fd, tdo_gpio);
+ cleanup_fd(trst_fd, trst_gpio);
+ }
+ if (transport_is_swd()) {
+ cleanup_fd(swclk_fd, swclk_gpio);
+ cleanup_fd(swdio_fd, swdio_gpio);
+ }
cleanup_fd(srst_fd, srst_gpio);
}
static bool sysfsgpio_jtag_mode_possible(void)
{
if (!is_gpio_valid(tck_gpio))
- return 0;
+ return false;
if (!is_gpio_valid(tms_gpio))
- return 0;
+ return false;
if (!is_gpio_valid(tdi_gpio))
- return 0;
+ return false;
if (!is_gpio_valid(tdo_gpio))
- return 0;
- return 1;
+ return false;
+ return true;
}
static bool sysfsgpio_swd_mode_possible(void)
{
if (!is_gpio_valid(swclk_gpio))
- return 0;
+ return false;
if (!is_gpio_valid(swdio_gpio))
- return 0;
- return 1;
+ return false;
+ return true;
}
static int sysfsgpio_init(void)
LOG_INFO("SysfsGPIO JTAG/SWD bitbang driver");
- if (sysfsgpio_jtag_mode_possible()) {
- if (sysfsgpio_swd_mode_possible())
- LOG_INFO("JTAG and SWD modes enabled");
- else
- LOG_INFO("JTAG only mode enabled (specify swclk and swdio gpio to add SWD mode)");
- if (!is_gpio_valid(trst_gpio) && !is_gpio_valid(srst_gpio)) {
- LOG_ERROR("Require at least one of trst or srst gpios to be specified");
- return ERROR_JTAG_INIT_FAILED;
- }
- } else if (sysfsgpio_swd_mode_possible()) {
- LOG_INFO("SWD only mode enabled (specify tck, tms, tdi and tdo gpios to add JTAG mode)");
- } else {
- LOG_ERROR("Require tck, tms, tdi and tdo gpios for JTAG mode and/or swclk and swdio gpio for SWD mode");
- return ERROR_JTAG_INIT_FAILED;
- }
-
-
/*
* Configure TDO as an input, and TDI, TCK, TMS, TRST, SRST
* as outputs. Drive TDI and TCK low, and TMS/TRST/SRST high.
* For SWD, SWCLK and SWDIO are configures as output high.
*/
- if (tck_gpio >= 0) {
+
+ if (transport_is_jtag()) {
+ if (!sysfsgpio_jtag_mode_possible()) {
+ LOG_ERROR("Require tck, tms, tdi and tdo gpios for JTAG mode");
+ return ERROR_JTAG_INIT_FAILED;
+ }
+
tck_fd = setup_sysfs_gpio(tck_gpio, 1, 0);
if (tck_fd < 0)
goto out_error;
- }
- if (tms_gpio >= 0) {
tms_fd = setup_sysfs_gpio(tms_gpio, 1, 1);
if (tms_fd < 0)
goto out_error;
- }
- if (tdi_gpio >= 0) {
tdi_fd = setup_sysfs_gpio(tdi_gpio, 1, 0);
if (tdi_fd < 0)
goto out_error;
- }
- if (tdo_gpio >= 0) {
tdo_fd = setup_sysfs_gpio(tdo_gpio, 0, 0);
if (tdo_fd < 0)
goto out_error;
- }
- /* assume active low*/
- if (trst_gpio >= 0) {
- trst_fd = setup_sysfs_gpio(trst_gpio, 1, 1);
- if (trst_fd < 0)
- goto out_error;
+ /* assume active low*/
+ if (trst_gpio >= 0) {
+ trst_fd = setup_sysfs_gpio(trst_gpio, 1, 1);
+ if (trst_fd < 0)
+ goto out_error;
+ }
}
- /* assume active low*/
- if (srst_gpio >= 0) {
- srst_fd = setup_sysfs_gpio(srst_gpio, 1, 1);
- if (srst_fd < 0)
- goto out_error;
- }
+ if (transport_is_swd()) {
+ if (!sysfsgpio_swd_mode_possible()) {
+ LOG_ERROR("Require swclk and swdio gpio for SWD mode");
+ return ERROR_JTAG_INIT_FAILED;
+ }
- if (swclk_gpio >= 0) {
swclk_fd = setup_sysfs_gpio(swclk_gpio, 1, 0);
if (swclk_fd < 0)
goto out_error;
- }
- if (swdio_gpio >= 0) {
swdio_fd = setup_sysfs_gpio(swdio_gpio, 1, 0);
if (swdio_fd < 0)
goto out_error;
}
- if (sysfsgpio_swd_mode_possible()) {
- if (swd_mode)
- bitbang_swd_switch_seq(JTAG_TO_SWD);
- else
- bitbang_swd_switch_seq(SWD_TO_JTAG);
+ /* assume active low*/
+ if (srst_gpio >= 0) {
+ srst_fd = setup_sysfs_gpio(srst_gpio, 1, 1);
+ if (srst_fd < 0)
+ goto out_error;
}
return ERROR_OK;
cleanup_all_fds();
return ERROR_OK;
}
-
projects / fw / openocd / blobdiff