- added support for Asix Presto JTAG interface (thanks to Pavel Chromy and Asix for making this addition possible)

- added support for usbprog (thanks to Benedikt Sauter)
- make OpenOCD listen for WM_QUIT messages on windows (thanks to Pavel Chromy)
- register at_exit handler to do necessary unregistering (thanks to Pavel Chromy)
- added dummy ETM capture driver to allow ETM to be registered without a capture driver


git-svn-id: svn://svn.berlios.de/openocd/trunk@180 b42882b7-edfa-0310-969c-e2dbd0fdcd60

1 files changed, 388 insertions, 0 deletions

diff --git a/src/jtag/bitq.c b/src/jtag/bitq.c
new file mode 100644
index 00000000..03f9645d
--- /dev/null
+++ b/src/jtag/bitq.c
@@ -0,0 +1,388 @@
+/***************************************************************************
+ *   Copyright (C) 2007 by Pavel Chromy                                    *
+ *   chromy@asix.cz                                                        *
+ *                                                                         *
+ *   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 "bitq.h"
+
+/* project specific includes */
+#include "log.h"
+#include "types.h"
+#include "jtag.h"
+#include "configuration.h"
+
+/* system includes */
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <sys/time.h>
+#include <time.h>
+
+
+bitq_interface_t *bitq_interface; /* low level bit queue interface */
+
+bitq_state_t bitq_in_state; /* state of input queue */
+
+u8 *bitq_in_buffer; /* buffer dynamically reallocated as needed */
+unsigned long bitq_in_bufsize=32; /* min. buffer size */
+
+
+/*
+ * input queue processing does not use jtag_read_buffer() to avoid unnecessary overhead
+ * also the buffer for incomming data is reallocated only if necessary
+ * no parameters, makes use of stored state information
+ */ 
+void bitq_in_proc(void)
+{
+	/* static information preserved between calls to increase performance */
+	static u8 *in_buff; /* pointer to buffer for scanned data */
+  static int in_idx; /* index of byte being scanned */
+  static u8 in_mask; /* mask of next bit to be scanned */
+
+  scan_field_t *field;
+  int tdo;
+  
+  int result;
+
+  /* loop through the queue */
+  while (bitq_in_state.cmd) {
+    /* only JTAG_SCAN command may return data */
+    if (bitq_in_state.cmd->type==JTAG_SCAN) {
+      /* loop through the fields */
+      while (bitq_in_state.field_idx<bitq_in_state.cmd->cmd.scan->num_fields) {
+
+        field=&bitq_in_state.cmd->cmd.scan->fields[bitq_in_state.field_idx];
+        if (field->in_check_value || field->in_value || field->in_handler) {
+
+          if (bitq_in_state.bit_pos==0) {
+            /* initialize field scanning */
+            in_mask=0x01;
+            in_idx=0;
+            if (field->in_value) in_buff=field->in_value;
+            else {
+              /* buffer reallocation needed? */
+              if (field->num_bits>bitq_in_bufsize*8) {
+                /* buffer previously allocated? */
+                if (bitq_in_buffer!=NULL) {
+                  /* free it */
+                  free(bitq_in_buffer);
+                  bitq_in_buffer=NULL;
+                }
+                /* double the buffer size until it fits */
+                while (field->num_bits>bitq_in_bufsize*8) bitq_in_bufsize*=2;
+              }
+              /* if necessary, allocate buffer and check for malloc error */ 
+              if (bitq_in_buffer==NULL && (bitq_in_buffer=malloc(bitq_in_bufsize))==NULL) {
+                ERROR("malloc error");
+                exit(-1);                
+              }
+              in_buff=(void *)bitq_in_buffer;
+            }
+          }
+
+          /* field scanning */
+          while (bitq_in_state.bit_pos<field->num_bits) {
+            if ((tdo=bitq_interface->in())<0) {
+#ifdef _DEBUG_JTAG_IO_
+              DEBUG("bitq in EOF");
+#endif
+              return;
+            }
+            if (in_mask==0x01) in_buff[in_idx]=0;
+            if (tdo) in_buff[in_idx]|=in_mask;
+            if (in_mask==0x80) {
+              in_mask=0x01;
+              in_idx++;
+            }
+            else in_mask<<=1;
+            bitq_in_state.bit_pos++;
+          }
+          
+          if (field->in_check_value) {
+            /* match scanned in value */
+            for (in_idx=0; in_idx*8<field->num_bits; in_idx++) {
+              if (field->in_check_mask) in_mask=field->in_check_mask[in_idx];
+              else in_mask=0xff;
+              if (field->num_bits-in_idx*8<8) in_mask>>=8-(field->num_bits-in_idx*8);
+              if (field->in_check_value[in_idx]&in_mask!=in_buff[in_idx]&in_mask) {
+      					char *captured_char = buf_to_str(in_buff, (field->num_bits > 64) ? 64 : field->num_bits, 16);
+      					char *in_check_value_char = buf_to_str(field->in_check_value, (field->num_bits > 64) ? 64 : field->num_bits, 16);
+      					char *in_check_mask_char = buf_to_str(field->in_check_mask, (field->num_bits > 64) ? 64 : field->num_bits, 16);
+      					/* TODO: error reporting */
+      					WARNING("value captured during scan didn't pass the requested check: captured: 0x%s check_value: 0x%s check_mask: 0x%s", captured_char, in_check_value_char, in_check_mask_char);
+      					bitq_in_state.status=ERROR_JTAG_QUEUE_FAILED;
+      					free(captured_char);
+      					free(in_check_value_char);
+      					free(in_check_mask_char);
+                break; /* leave the comparison loop upon first mismatch */      					
+              }
+            }
+          }
+
+          if (field->in_handler && bitq_in_state.status==ERROR_OK) {
+            bitq_in_state.status=(*field->in_handler)(in_buff, field->in_handler_priv);
+          }
+
+        }
+        
+        bitq_in_state.field_idx++; /* advance to next field */
+        bitq_in_state.bit_pos=0; /* start next field from the first bit */
+      }
+
+    }
+    bitq_in_state.cmd=bitq_in_state.cmd->next; /* advance to next command */
+    bitq_in_state.field_idx=0; /* preselect first field */
+  }
+}
+
+
+
+void bitq_io(int tms, int tdi, int tdo_req)
+{
+  bitq_interface->out(tms, tdi, tdo_req);
+  /* check and process the input queue */ 
+  if (bitq_interface->in_rdy()) bitq_in_proc();
+}
+
+
+void bitq_end_state(enum tap_state state)
+{
+  if (state==-1) return;
+  if (tap_move_map[state]==-1) {
+		ERROR("BUG: %i is not a valid end state", state);
+		exit(-1);
+	}
+  end_state = state;
+}
+
+
+void bitq_state_move(enum tap_state new_state)
+{
+  int i=0;
+  u8 tms_scan;
+
+  if (tap_move_map[cur_state]==-1 || tap_move_map[new_state]==-1) {
+    ERROR("TAP move from or to unstable state");
+    exit(-1);
+  }
+  
+  tms_scan=TAP_MOVE(cur_state, new_state);
+
+  for (i=0; i<7; i++) {
+    bitq_io(tms_scan&1, 0, 0);
+    tms_scan>>=1;
+  }
+
+  cur_state = new_state;
+}
+
+
+void bitq_path_move(pathmove_command_t *cmd)
+{
+  int i;
+
+  for (i=0; i<=cmd->num_states; i++) {
+    if (tap_transitions[cur_state].low == cmd->path[i]) bitq_io(0, 0, 0);
+    else if (tap_transitions[cur_state].high == cmd->path[i]) bitq_io(1, 0, 0);
+    else {
+      ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_strings[cur_state], tap_state_strings[cmd->path[i]]);
+      exit(-1);
+    }
+
+    cur_state = cmd->path[i];
+  }
+
+  end_state = cur_state;
+}
+
+
+void bitq_runtest(int num_cycles)
+{
+  int i;
+
+  /* only do a state_move when we're not already in RTI */
+  if (cur_state != TAP_RTI) bitq_state_move(TAP_RTI);
+
+  /* execute num_cycles */
+  for (i = 0; i < num_cycles; i++)
+    bitq_io(0, 0, 0);
+
+  /* finish in end_state */
+  if (cur_state != end_state) bitq_state_move(end_state);
+}
+
+
+void bitq_scan_field(scan_field_t *field, int pause)
+{
+  int bit_cnt;
+  int tdo_req;
+
+  u8 *out_ptr;
+  u8 out_mask;
+  
+  if (field->in_check_value || field->in_value || field->in_handler) tdo_req=1;
+  else tdo_req=0;
+
+  if (field->out_value==NULL) {
+    /* just send zeros and request data from TDO */
+    for (bit_cnt=field->num_bits; bit_cnt>1; bit_cnt--)
+      bitq_io(0, 0, tdo_req);
+    bitq_io(pause, 0, tdo_req);
+  }
+  else {
+    /* send data, and optionally request TDO */
+    out_mask=0x01;
+    out_ptr=field->out_value;
+    for (bit_cnt=field->num_bits; bit_cnt>1; bit_cnt--) {
+      bitq_io(0, ((*out_ptr)&out_mask)!=0, tdo_req);
+      if (out_mask==0x80) {
+        out_mask=0x01;
+        out_ptr++;
+      }
+      else out_mask<<=1;
+    }
+    bitq_io(pause, ((*out_ptr)&out_mask)!=0, tdo_req);
+  }
+
+  if (pause) {
+    bitq_io(0,0,0);
+    if (cur_state==TAP_SI) cur_state=TAP_PI;
+    else if (cur_state==TAP_SD) cur_state=TAP_PD;
+  }
+}
+
+
+void bitq_scan(scan_command_t *cmd)
+{
+  int i;
+
+  if (cmd->ir_scan) bitq_state_move(TAP_SI);
+  else bitq_state_move(TAP_SD);
+
+  for (i=0; i < cmd->num_fields-1; i++)
+    bitq_scan_field(&cmd->fields[i], 0);
+  bitq_scan_field(&cmd->fields[i], 1);
+}
+
+
+int bitq_execute_queue(void)
+{
+  jtag_command_t *cmd = jtag_command_queue; /* currently processed command */
+  
+  bitq_in_state.cmd = jtag_command_queue;
+  bitq_in_state.field_idx = 0;
+  bitq_in_state.bit_pos = 0;
+  bitq_in_state.status = ERROR_OK;
+
+  while (cmd) {
+
+    switch (cmd->type) {
+
+      case JTAG_END_STATE:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("end_state: %i", cmd->cmd.end_state->end_state);
+#endif
+        bitq_end_state(cmd->cmd.end_state->end_state);
+        break;
+
+      case JTAG_RESET:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+#endif
+				bitq_interface->reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
+        if (bitq_interface->in_rdy()) bitq_in_proc();
+        break;
+
+      case JTAG_RUNTEST:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, cmd->cmd.runtest->end_state);
+#endif
+        bitq_end_state(cmd->cmd.runtest->end_state);
+        bitq_runtest(cmd->cmd.runtest->num_cycles);
+        break;
+
+      case JTAG_STATEMOVE:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("statemove end in %i", cmd->cmd.statemove->end_state);
+#endif
+        bitq_end_state(cmd->cmd.statemove->end_state);
+        bitq_state_move(end_state); /* uncoditional TAP move */
+        break;
+
+      case JTAG_PATHMOVE:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("pathmove: %i states, end in %i", cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
+#endif
+        bitq_path_move(cmd->cmd.pathmove);
+        break;
+
+      case JTAG_SCAN:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("scan end in %i", cmd->cmd.scan->end_state);
+        if (cmd->cmd.scan->ir_scan) DEBUG("scan ir");
+        else DEBUG("scan dr");
+#endif
+        bitq_end_state(cmd->cmd.scan->end_state);
+        bitq_scan(cmd->cmd.scan);
+        if (cur_state != end_state) bitq_state_move(end_state);
+        break;
+
+      case JTAG_SLEEP:
+#ifdef _DEBUG_JTAG_IO_
+        DEBUG("sleep %i", cmd->cmd.sleep->us);
+#endif
+				bitq_interface->sleep(cmd->cmd.sleep->us);
+        if (bitq_interface->in_rdy()) bitq_in_proc();
+        break;
+
+      default:
+        ERROR("BUG: unknown JTAG command type encountered");
+        exit(-1);
+    }
+
+    cmd = cmd->next;
+  }
+
+  bitq_interface->flush();
+  bitq_in_proc();
+
+  if (bitq_in_state.cmd) {
+    ERROR("missing data from bitq interface");
+    return ERROR_JTAG_QUEUE_FAILED;
+  }
+  if (bitq_interface->in()>=0) {
+    ERROR("extra data from bitq interface");
+    return ERROR_JTAG_QUEUE_FAILED;
+  }
+
+  return bitq_in_state.status;
+}
+
+
+void bitq_cleanup(void)
+{
+	if (bitq_in_buffer!=NULL)
+	{
+		free(bitq_in_buffer);
+		bitq_in_buffer=NULL;
+	}
+}