From a87e699edf7d4d2f772bfa8f50535ad9f3086a56 Mon Sep 17 00:00:00 2001 From: Paul Fertser Date: Fri, 20 Jun 2014 12:47:24 +0400 Subject: [PATCH] jtag/drivers/ftdi: add option to declare signal aliases This adds -alias|-nalias options to ftdi_layout_signal command that allow to declare a new signal based on an already defined one. Change-Id: I552578ebcd12ae21957a1c0d3b7e878adeff6df0 Signed-off-by: Paul Fertser Reviewed-on: http://openocd.zylin.com/2181 Tested-by: jenkins Reviewed-by: Andreas Fritiofson --- doc/openocd.texi | 6 +++++- src/jtag/drivers/ftdi.c | 15 ++++++++++++++- 2 files changed, 19 insertions(+), 2 deletions(-) diff --git a/doc/openocd.texi b/doc/openocd.texi index fa8f1c55..e51de4de 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -2767,7 +2767,7 @@ minimal impact on the target system. Avoid floating inputs, conflicting outputs and initially asserted reset signals. @end deffn -@deffn {Config Command} {ftdi_layout_signal} name [@option{-data}|@option{-ndata} data_mask] [@option{-oe}|@option{-noe} oe_mask] +@deffn {Config Command} {ftdi_layout_signal} name [@option{-data}|@option{-ndata} data_mask] [@option{-oe}|@option{-noe} oe_mask] [@option{-alias}|@option{-nalias} name] Creates a signal with the specified @var{name}, controlled by one or more FTDI GPIO pins via a range of possible buffer connections. The masks are FTDI GPIO register bitmasks to tell the driver the connection and type of the output @@ -2790,6 +2790,10 @@ target without any buffer. The FTDI pin is then switched between output and input as necessary to provide the full set of low, high and Hi-Z characteristics. In all other cases, the pins specified in a signal definition are always driven by the FTDI. + +If @option{-alias} or @option{-nalias} is used, the signal is created +identical (or with data inverted) to an already specified signal +@var{name}. @end deffn @deffn {Command} {ftdi_set_signal} name @option{0}|@option{1}|@option{z} diff --git a/src/jtag/drivers/ftdi.c b/src/jtag/drivers/ftdi.c index be02d209..9d344473 100644 --- a/src/jtag/drivers/ftdi.c +++ b/src/jtag/drivers/ftdi.c @@ -740,6 +740,19 @@ COMMAND_HANDLER(ftdi_handle_layout_signal_command) } else if (strcmp("-noe", CMD_ARGV[i]) == 0) { invert_oe = true; COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], oe_mask); + } else if (!strcmp("-alias", CMD_ARGV[i]) || + !strcmp("-nalias", CMD_ARGV[i])) { + if (!strcmp("-nalias", CMD_ARGV[i])) + invert_data = true; + struct signal *sig = find_signal_by_name(CMD_ARGV[i + 1]); + if (!sig) { + LOG_ERROR("signal %s is not defined", CMD_ARGV[i + 1]); + return ERROR_FAIL; + } + data_mask = sig->data_mask; + oe_mask = sig->oe_mask; + invert_oe = sig->invert_oe; + invert_data ^= sig->invert_data; } else { LOG_ERROR("unknown option '%s'", CMD_ARGV[i]); return ERROR_COMMAND_SYNTAX_ERROR; @@ -869,7 +882,7 @@ static const struct command_registration ftdi_command_handlers[] = { .mode = COMMAND_ANY, .help = "define a signal controlled by one or more FTDI GPIO as data " "and/or output enable", - .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask]", + .usage = "name [-data mask|-ndata mask] [-oe mask|-noe mask] [-alias|-nalias name]", }, { .name = "ftdi_set_signal", -- 2.39.5