move jtag drivers to src/jtag/drivers

Moves JTAG interface drivers to src/jtag/drivers/,
Adds src/jtag/drivers/Makefile.am.
Builds libocdjtagdrivers.la.

Flattens the rlink driver files into the drivers/ directory, adding
the 'rlink_' prefix or '.rlink' suffix as appropriate.

1 files changed, 0 insertions, 325 deletions

diff --git a/src/jtag/bitbang.c b/src/jtag/bitbang.c
deleted file mode 100644
index 69c17298..00000000
--- a/src/jtag/bitbang.c
+++ /dev/null
@@ -1,325 +0,0 @@
-/***************************************************************************
- *   Copyright (C) 2005 by Dominic Rath                                    *
- *   Dominic.Rath@gmx.de                                                   *
- *                                                                         *
- *   Copyright (C) 2007,2008 Øyvind Harboe                                 *
- *   oyvind.harboe@zylin.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, write to the                         *
- *   Free Software Foundation, Inc.,                                       *
- *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
- ***************************************************************************/
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "bitbang.h"
-#include "interface.h"
-#include "commands.h"
-
-/**
- * Function bitbang_stableclocks
- * issues a number of clock cycles while staying in a stable state.
- * Because the TMS value required to stay in the RESET state is a 1, whereas
- * the TMS value required to stay in any of the other stable states is a 0,
- * this function checks the current stable state to decide on the value of TMS
- * to use.
- */
-static void bitbang_stableclocks(int num_cycles);
-
-
-struct bitbang_interface *bitbang_interface;
-
-/* DANGER!!!! clock absolutely *MUST* be 0 in idle or reset won't work!
- *
- * Set this to 1 and str912 reset halt will fail.
- *
- * If someone can submit a patch with an explanation it will be greatly
- * appreciated, but as far as I can tell (ØH) DCLK is generated upon
- * clk = 0 in TAP_IDLE. Good luck deducing that from the ARM documentation!
- * The ARM documentation uses the term "DCLK is asserted while in the TAP_IDLE
- * state". With hardware there is no such thing as *while* in a state. There
- * are only edges. So clk => 0 is in fact a very subtle state transition that
- * happens *while* in the TAP_IDLE state. "#&¤"#¤&"#&"#&
- *
- * For "reset halt" the last thing that happens before srst is asserted
- * is that the breakpoint is set up. If DCLK is not wiggled one last
- * time before the reset, then the breakpoint is not set up and
- * "reset halt" will fail to halt.
- *
- */
-#define CLOCK_IDLE() 0
-
-
-/* The bitbang driver leaves the TCK 0 when in idle */
-static void bitbang_end_state(tap_state_t state)
-{
-	if (tap_is_state_stable(state))
-		tap_set_end_state(state);
-	else
-	{
-		LOG_ERROR("BUG: %i is not a valid end state", state);
-		exit(-1);
-	}
-}
-
-static void bitbang_state_move(int skip)
-{
-	int i = 0, tms = 0;
-	uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
-	int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
-
-	for (i = skip; i < tms_count; i++)
-	{
-		tms = (tms_scan >> i) & 1;
-		bitbang_interface->write(0, tms, 0);
-		bitbang_interface->write(1, tms, 0);
-	}
-	bitbang_interface->write(CLOCK_IDLE(), tms, 0);
-
-	tap_set_state(tap_get_end_state());
-}
-
-static void bitbang_path_move(struct pathmove_command *cmd)
-{
-	int num_states = cmd->num_states;
-	int state_count;
-	int tms = 0;
-
-	state_count = 0;
-	while (num_states)
-	{
-		if (tap_state_transition(tap_get_state(), false) == cmd->path[state_count])
-		{
-			tms = 0;
-		}
-		else if (tap_state_transition(tap_get_state(), true) == cmd->path[state_count])
-		{
-			tms = 1;
-		}
-		else
-		{
-			LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(cmd->path[state_count]));
-			exit(-1);
-		}
-
-		bitbang_interface->write(0, tms, 0);
-		bitbang_interface->write(1, tms, 0);
-
-		tap_set_state(cmd->path[state_count]);
-		state_count++;
-		num_states--;
-	}
-
-	bitbang_interface->write(CLOCK_IDLE(), tms, 0);
-
-	tap_set_end_state(tap_get_state());
-}
-
-static void bitbang_runtest(int num_cycles)
-{
-	int i;
-
-	tap_state_t saved_end_state = tap_get_end_state();
-
-	/* only do a state_move when we're not already in IDLE */
-	if (tap_get_state() != TAP_IDLE)
-	{
-		bitbang_end_state(TAP_IDLE);
-		bitbang_state_move(0);
-	}
-
-	/* execute num_cycles */
-	for (i = 0; i < num_cycles; i++)
-	{
-		bitbang_interface->write(0, 0, 0);
-		bitbang_interface->write(1, 0, 0);
-	}
-	bitbang_interface->write(CLOCK_IDLE(), 0, 0);
-
-	/* finish in end_state */
-	bitbang_end_state(saved_end_state);
-	if (tap_get_state() != tap_get_end_state())
-		bitbang_state_move(0);
-}
-
-
-static void bitbang_stableclocks(int num_cycles)
-{
-	int tms = (tap_get_state() == TAP_RESET ? 1 : 0);
-	int i;
-
-	/* send num_cycles clocks onto the cable */
-	for (i = 0; i < num_cycles; i++)
-	{
-		bitbang_interface->write(1, tms, 0);
-		bitbang_interface->write(0, tms, 0);
-	}
-}
-
-
-
-static void bitbang_scan(bool ir_scan, enum scan_type type, uint8_t *buffer, int scan_size)
-{
-	tap_state_t saved_end_state = tap_get_end_state();
-	int bit_cnt;
-
-	if (!((!ir_scan && (tap_get_state() == TAP_DRSHIFT)) || (ir_scan && (tap_get_state() == TAP_IRSHIFT))))
-	{
-		if (ir_scan)
-			bitbang_end_state(TAP_IRSHIFT);
-		else
-			bitbang_end_state(TAP_DRSHIFT);
-
-		bitbang_state_move(0);
-		bitbang_end_state(saved_end_state);
-	}
-
-	for (bit_cnt = 0; bit_cnt < scan_size; bit_cnt++)
-	{
-		int val = 0;
-		int tms = (bit_cnt == scan_size-1) ? 1 : 0;
-		int tdi;
-		int bytec = bit_cnt/8;
-		int bcval = 1 << (bit_cnt % 8);
-
-		/* if we're just reading the scan, but don't care about the output
-		 * default to outputting 'low', this also makes valgrind traces more readable,
-		 * as it removes the dependency on an uninitialised value
-		 */
-		tdi = 0;
-		if ((type != SCAN_IN) && (buffer[bytec] & bcval))
-			tdi = 1;
-
-		bitbang_interface->write(0, tms, tdi);
-
-		if (type != SCAN_OUT)
-			val = bitbang_interface->read();
-
-		bitbang_interface->write(1, tms, tdi);
-
-		if (type != SCAN_OUT)
-		{
-			if (val)
-				buffer[bytec] |= bcval;
-			else
-				buffer[bytec] &= ~bcval;
-		}
-	}
-
-	if (tap_get_state() != tap_get_end_state())
-	{
-		/* we *KNOW* the above loop transitioned out of
-		 * the shift state, so we skip the first state
-		 * and move directly to the end state.
-		 */
-		bitbang_state_move(1);
-	}
-}
-
-int bitbang_execute_queue(void)
-{
-	struct jtag_command *cmd = jtag_command_queue; /* currently processed command */
-	int scan_size;
-	enum scan_type type;
-	uint8_t *buffer;
-	int retval;
-
-	if (!bitbang_interface)
-	{
-		LOG_ERROR("BUG: Bitbang interface called, but not yet initialized");
-		exit(-1);
-	}
-
-	/* return ERROR_OK, unless a jtag_read_buffer returns a failed check
-	 * that wasn't handled by a caller-provided error handler
-	 */
-	retval = ERROR_OK;
-
-	if (bitbang_interface->blink)
-		bitbang_interface->blink(1);
-
-	while (cmd)
-	{
-		switch (cmd->type)
-		{
-			case JTAG_RESET:
-#ifdef _DEBUG_JTAG_IO_
-				LOG_DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-#endif
-				if ((cmd->cmd.reset->trst == 1) || (cmd->cmd.reset->srst && (jtag_get_reset_config() & RESET_SRST_PULLS_TRST)))
-				{
-					tap_set_state(TAP_RESET);
-				}
-				bitbang_interface->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-				break;
-			case JTAG_RUNTEST:
-#ifdef _DEBUG_JTAG_IO_
-				LOG_DEBUG("runtest %i cycles, end in %s", cmd->cmd.runtest->num_cycles, tap_state_name(cmd->cmd.runtest->end_state));
-#endif
-				bitbang_end_state(cmd->cmd.runtest->end_state);
-				bitbang_runtest(cmd->cmd.runtest->num_cycles);
-				break;
-
-			case JTAG_STABLECLOCKS:
-				/* this is only allowed while in a stable state.  A check for a stable
-				 * state was done in jtag_add_clocks()
-				 */
-				bitbang_stableclocks(cmd->cmd.stableclocks->num_cycles);
-				break;
-
-			case JTAG_STATEMOVE:
-#ifdef _DEBUG_JTAG_IO_
-				LOG_DEBUG("statemove end in %s", tap_state_name(cmd->cmd.statemove->end_state));
-#endif
-				bitbang_end_state(cmd->cmd.statemove->end_state);
-				bitbang_state_move(0);
-				break;
-			case JTAG_PATHMOVE:
-#ifdef _DEBUG_JTAG_IO_
-				LOG_DEBUG("pathmove: %i states, end in %s", cmd->cmd.pathmove->num_states,
-					tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
-#endif
-				bitbang_path_move(cmd->cmd.pathmove);
-				break;
-			case JTAG_SCAN:
-#ifdef _DEBUG_JTAG_IO_
-				LOG_DEBUG("%s scan end in %s",  (cmd->cmd.scan->ir_scan) ? "IR" : "DR", tap_state_name(cmd->cmd.scan->end_state));
-#endif
-				bitbang_end_state(cmd->cmd.scan->end_state);
-				scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
-				type = jtag_scan_type(cmd->cmd.scan);
-				bitbang_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size);
-				if (jtag_read_buffer(buffer, cmd->cmd.scan) != ERROR_OK)
-					retval = ERROR_JTAG_QUEUE_FAILED;
-				if (buffer)
-					free(buffer);
-				break;
-			case JTAG_SLEEP:
-#ifdef _DEBUG_JTAG_IO_
-				LOG_DEBUG("sleep %" PRIi32, cmd->cmd.sleep->us);
-#endif
-				jtag_sleep(cmd->cmd.sleep->us);
-				break;
-			default:
-				LOG_ERROR("BUG: unknown JTAG command type encountered");
-				exit(-1);
-		}
-		cmd = cmd->next;
-	}
-	if (bitbang_interface->blink)
-		bitbang_interface->blink(0);
-
-	return retval;
-}