/***************************************************************************
* Copyright (C) 2011 by Richard Uhler *
* ruhler@mit.edu *
+ * *
+ * Copyright (C) 2021 by Manuel Wick <manuel@matronix.de> *
***************************************************************************/
#ifdef HAVE_CONFIG_H
static uint8_t remote_bitbang_send_buf[512];
static unsigned int remote_bitbang_send_buf_used;
+static bool use_remote_sleep;
+
/* Circular buffer. When start == end, the buffer is empty. */
static char remote_bitbang_recv_buf[256];
static unsigned int remote_bitbang_recv_buf_start;
return remote_bitbang_queue(c, FLUSH_SEND_BUF);
}
+static int remote_bitbang_sleep(unsigned int microseconds)
+{
+ if (!use_remote_sleep) {
+ jtag_sleep(microseconds);
+ return ERROR_OK;
+ }
+
+ int tmp;
+ unsigned int ms = microseconds / 1000;
+ unsigned int us = microseconds % 1000;
+
+ for (unsigned int i = 0; i < ms; i++) {
+ tmp = remote_bitbang_queue('D', NO_FLUSH);
+ if (tmp != ERROR_OK)
+ return tmp;
+ }
+
+ for (unsigned int i = 0; i < us; i++) {
+ tmp = remote_bitbang_queue('d', NO_FLUSH);
+ if (tmp != ERROR_OK)
+ return tmp;
+ }
+
+ return remote_bitbang_flush();
+}
+
static int remote_bitbang_blink(int on)
{
char c = on ? 'B' : 'b';
return remote_bitbang_queue(c, FLUSH_SEND_BUF);
}
+static void remote_bitbang_swdio_drive(bool is_output)
+{
+ char c = is_output ? 'O' : 'o';
+ if (remote_bitbang_queue(c, FLUSH_SEND_BUF) == ERROR_FAIL)
+ LOG_ERROR("Error setting direction for swdio");
+}
+
+static int remote_bitbang_swdio_read(void)
+{
+ if (remote_bitbang_queue('c', FLUSH_SEND_BUF) != ERROR_FAIL)
+ return remote_bitbang_read_sample();
+ else
+ return BB_ERROR;
+}
+
+static int remote_bitbang_swd_write(int swclk, int swdio)
+{
+ char c = 'd' + ((swclk ? 0x2 : 0x0) | (swdio ? 0x1 : 0x0));
+ return remote_bitbang_queue(c, NO_FLUSH);
+}
+
static struct bitbang_interface remote_bitbang_bitbang = {
.buf_size = sizeof(remote_bitbang_recv_buf) - 1,
.sample = &remote_bitbang_sample,
.read_sample = &remote_bitbang_read_sample,
.write = &remote_bitbang_write,
+ .swdio_read = &remote_bitbang_swdio_read,
+ .swdio_drive = &remote_bitbang_swdio_drive,
+ .swd_write = &remote_bitbang_swd_write,
.blink = &remote_bitbang_blink,
+ .sleep = &remote_bitbang_sleep,
+ .flush = &remote_bitbang_flush,
};
static int remote_bitbang_init_tcp(void)
return ERROR_COMMAND_SYNTAX_ERROR;
}
+static const char * const remote_bitbang_transports[] = { "jtag", "swd", NULL };
+
+COMMAND_HANDLER(remote_bitbang_handle_remote_bitbang_use_remote_sleep_command)
+{
+ if (CMD_ARGC != 1)
+ return ERROR_COMMAND_SYNTAX_ERROR;
+
+ COMMAND_PARSE_ON_OFF(CMD_ARGV[0], use_remote_sleep);
+
+ return ERROR_OK;
+}
+
static const struct command_registration remote_bitbang_subcommand_handlers[] = {
{
.name = "port",
" if port is 0 or unset, this is the name of the unix socket to use.",
.usage = "host_name",
},
- COMMAND_REGISTRATION_DONE,
+ {
+ .name = "use_remote_sleep",
+ .handler = remote_bitbang_handle_remote_bitbang_use_remote_sleep_command,
+ .mode = COMMAND_CONFIG,
+ .help = "Rather than executing sleep locally, include delays in the "
+ "instruction stream for the remote host.",
+ .usage = "(on|off)",
+ },
+ COMMAND_REGISTRATION_DONE
};
static const struct command_registration remote_bitbang_command_handlers[] = {
struct adapter_driver remote_bitbang_adapter_driver = {
.name = "remote_bitbang",
- .transports = jtag_only,
+ .transports = remote_bitbang_transports,
.commands = remote_bitbang_command_handlers,
.init = &remote_bitbang_init,
.reset = &remote_bitbang_reset,
.jtag_ops = &remote_bitbang_interface,
+ .swd_ops = &bitbang_swd,
};