- added ft2232_latency command

git-svn-id: svn://svn.berlios.de/openocd/trunk@205 b42882b7-edfa-0310-969c-e2dbd0fdcd60

diff --git a/src/jtag/ft2232.c b/src/jtag/ft2232.c
index b1acee58b25a78ca4a01a7ab0d25b9e32f135494..629bab08495e4b3311629efa5cdb822029ec1849 100644 (file)
--- a/src/jtag/ft2232.c
+++ b/src/jtag/ft2232.c
@@ -73,10 +73,12 @@ int ft2232_handle_device_desc_command(struct command_context_s *cmd_ctx, char *c
 int ft2232_handle_serial_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int ft2232_handle_layout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+int ft2232_handle_latency_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 
 char *ft2232_device_desc = NULL;
 char *ft2232_serial = NULL;
 char *ft2232_layout = NULL;
+unsigned char ft2232_latency = 2;
 
 #define MAX_USB_IDS    8
 /* vid = pid = 0 marks the end of the list */
@@ -272,6 +274,8 @@ int ft2232_register_commands(struct command_context_s *cmd_ctx)
                COMMAND_CONFIG, NULL);
        register_command(cmd_ctx, NULL, "ft2232_vid_pid", ft2232_handle_vid_pid_command,
                                         COMMAND_CONFIG, NULL);
+       register_command(cmd_ctx, NULL, "ft2232_latency", ft2232_handle_latency_command,
+                                        COMMAND_CONFIG, NULL);
        return ERROR_OK;
 }
 
@@ -1369,7 +1373,7 @@ static int ft2232_init_ftd2xx(u16 vid, u16 pid, int more, int *try_more)
                return ERROR_JTAG_INIT_FAILED;
        }
 
-       if ((status = FT_SetLatencyTimer(ftdih, 2)) != FT_OK)
+       if ((status = FT_SetLatencyTimer(ftdih, ft2232_latency)) != FT_OK)
        {
                ERROR("unable to set latency timer: %lu", status);
                return ERROR_JTAG_INIT_FAILED;
@@ -1449,7 +1453,7 @@ static int ft2232_init_libftdi(u16 vid, u16 pid, int more, int *try_more)
                return ERROR_JTAG_INIT_FAILED;
        }
 
-       if (ftdi_set_latency_timer(&ftdic, 2) < 0)
+       if (ftdi_set_latency_timer(&ftdic, ft2232_latency) < 0)
        {
                ERROR("unable to set latency timer");
                return ERROR_JTAG_INIT_FAILED;
@@ -2039,3 +2043,18 @@ int ft2232_handle_vid_pid_command(struct command_context_s *cmd_ctx, char *cmd,
 
        return ERROR_OK;
 }
+
+int ft2232_handle_latency_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+       if (argc == 1)
+       {
+               ft2232_latency = atoi(args[0]);
+       }
+       else
+       {
+               ERROR("expected exactly one argument to ft2232_latency <ms>");
+       }
+       
+       return ERROR_OK;
+}
+