cpld/virtex2: allow JSTART to be disabled

[openocd.git] / src / pld / virtex2.c

diff --git a/src/pld/virtex2.c b/src/pld/virtex2.c
index b60056158828c9e6e87547204a72a049f48519c8..82eb788f9576034d1b60c8fa9920180e26642c19 100644 (file)
--- a/src/pld/virtex2.c
+++ b/src/pld/virtex2.c
@@ -159,13 +159,15 @@ static int virtex2_load(struct pld_device *pld_device, const char *filename)
 
        jtag_add_tlr();
 
-       virtex2_set_instr(virtex2_info->tap, 0xc);      /* JSTART */
+       if (!(virtex2_info->no_jstart))
+               virtex2_set_instr(virtex2_info->tap, 0xc);      /* JSTART */
        jtag_add_runtest(13, TAP_IDLE);
-       virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
-       virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
-       virtex2_set_instr(virtex2_info->tap, 0xc);      /* JSTART */
+       virtex2_set_instr(virtex2_info->tap, 0x3f);             /* BYPASS */
+       virtex2_set_instr(virtex2_info->tap, 0x3f);             /* BYPASS */
+       if (!(virtex2_info->no_jstart))
+               virtex2_set_instr(virtex2_info->tap, 0xc);      /* JSTART */
        jtag_add_runtest(13, TAP_IDLE);
-       virtex2_set_instr(virtex2_info->tap, 0x3f);     /* BYPASS */
+       virtex2_set_instr(virtex2_info->tap, 0x3f);             /* BYPASS */
        jtag_execute_queue();
 
        return ERROR_OK;
@@ -212,6 +214,10 @@ PLD_DEVICE_COMMAND_HANDLER(virtex2_pld_device_command)
        virtex2_info = malloc(sizeof(struct virtex2_pld_device));
        virtex2_info->tap = tap;
 
+       virtex2_info->no_jstart = 0;
+       if (CMD_ARGC >= 3)
+               COMMAND_PARSE_NUMBER(int, CMD_ARGV[2], virtex2_info->no_jstart);
+
        pld->driver_priv = virtex2_info;
 
        return ERROR_OK;