a3245bd7cd
For support of SWD we need to be able to clock out special bit sequences over TMS or SWDIO. Create this as a generic operation, not yet called by anything, which is split as usual into: - upper level abstraction ... here, jtag_add_tms_seq(); - midlayer implementation logic hooking that to the lowlevel code; - lowlevel minidriver operation ... here, interface_add_tms_seq(); - message type for request queue, here JTAG_TMS. This is done slightly differently than other operations: there's a flag saying whether the interface driver supports this request. (In fact a flag *word* so upper layers can learn about other capabilities too ... for example, supporting SWD operations.) That approach (flag) lets this method *eventually* be used to eliminate pathmove() and statemove() support from most adapter drivers, by moving all that logic into the mid-layer and increasing uniformity between the various drivers. (Which will in turn reduce subtle bugginess.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
92 lines
4.1 KiB
C
92 lines
4.1 KiB
C
/***************************************************************************
|
|
* Copyright (C) 2005 by Dominic Rath *
|
|
* Dominic.Rath@gmx.de *
|
|
* *
|
|
* Copyright (C) 2007,2008 Øyvind Harboe *
|
|
* oyvind.harboe@zylin.com *
|
|
* *
|
|
* Copyright (C) 2009 Zachary T Welch *
|
|
* zw@superlucidity.net *
|
|
* *
|
|
* 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, write to the *
|
|
* Free Software Foundation, Inc., *
|
|
* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
|
|
***************************************************************************/
|
|
#ifndef MINIDRIVER_H
|
|
#define MINIDRIVER_H
|
|
|
|
/**
|
|
* @page jtagminidriver JTAG Mini-Driver
|
|
*
|
|
* The JTAG minidriver interface allows the definition of alternate
|
|
* interface functions, instead of the built-in asynchronous driver
|
|
* module that is used by the standard JTAG interface drivers.
|
|
*
|
|
* In addtion to the functions defined in the @c minidriver.h file, the
|
|
* @c jtag_minidriver.h file must declare the following functions (or
|
|
* define static inline versions of them):
|
|
* - jtag_add_callback
|
|
* - jtag_add_callback4
|
|
* - interface_jtag_add_dr_out
|
|
*
|
|
* The following core functions are declared in this file for use by
|
|
* the minidriver and do @b not need to be defined by an implementation:
|
|
* - default_interface_jtag_execute_queue()
|
|
*/
|
|
|
|
// this header will be provided by the minidriver implementation,
|
|
// and it may provide additional declarations that must be defined.
|
|
#include <jtag/minidriver_imp.h>
|
|
|
|
int interface_jtag_add_ir_scan(
|
|
int num_fields, const struct scan_field* fields,
|
|
tap_state_t endstate);
|
|
int interface_jtag_add_plain_ir_scan(
|
|
int num_fields, const struct scan_field* fields,
|
|
tap_state_t endstate);
|
|
|
|
int interface_jtag_add_dr_scan(
|
|
int num_fields, const struct scan_field* fields,
|
|
tap_state_t endstate);
|
|
int interface_jtag_add_plain_dr_scan(
|
|
int num_fields, const struct scan_field* fields,
|
|
tap_state_t endstate);
|
|
|
|
int interface_jtag_add_tlr(void);
|
|
int interface_jtag_add_pathmove(int num_states, const tap_state_t* path);
|
|
int interface_jtag_add_runtest(int num_cycles, tap_state_t endstate);
|
|
|
|
int interface_add_tms_seq(unsigned num_bits, const uint8_t *bits);
|
|
|
|
/**
|
|
* This drives the actual srst and trst pins. srst will always be 0
|
|
* if jtag_reset_config & RESET_SRST_PULLS_TRST != 0 and ditto for
|
|
* trst.
|
|
*
|
|
* the higher level jtag_add_reset will invoke jtag_add_tlr() if
|
|
* approperiate
|
|
*/
|
|
int interface_jtag_add_reset(int trst, int srst);
|
|
int interface_jtag_add_sleep(uint32_t us);
|
|
int interface_jtag_add_clocks(int num_cycles);
|
|
int interface_jtag_execute_queue(void);
|
|
|
|
/**
|
|
* Calls the interface callback to execute the queue. This routine
|
|
* is used by the JTAG driver layer and should not be called directly.
|
|
*/
|
|
int default_interface_jtag_execute_queue(void);
|
|
|
|
#endif // MINIDRIVER_H
|