]> git.sur5r.net Git - openocd/commitdiff
- vsllink update from SimonQian [simonqian@SimonQian.com]
authorntfreak <ntfreak@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Tue, 21 Apr 2009 09:08:43 +0000 (09:08 +0000)
committerntfreak <ntfreak@b42882b7-edfa-0310-969c-e2dbd0fdcd60>
Tue, 21 Apr 2009 09:08:43 +0000 (09:08 +0000)
git-svn-id: svn://svn.berlios.de/openocd/trunk@1491 b42882b7-edfa-0310-969c-e2dbd0fdcd60

src/jtag/vsllink.c
src/target/interface/vsllink.cfg [new file with mode: 0644]

index 02d4e64ee39a2ed6ce3bfb8ca461b85bbabe636f..54a6eb64f7e3e5c889a402d67d4fee9276545c76 100644 (file)
 #define DEBUG_JTAG_IO(expr ...)
 #endif
 
-static u16 vsllink_vid;
-static u16 vsllink_pid;
-static u8 vsllink_bulkout;
-static u8 vsllink_bulkin;
+#define VSLLINK_MODE_NORMAL                    0
+#define VSLLINK_MODE_DMA                       1
 
-#define VSLLINK_USB_TIMEOUT                    10000
+static u16 vsllink_usb_vid;
+static u16 vsllink_usb_pid;
+static u8 vsllink_usb_bulkout;
+static u8 vsllink_usb_bulkin;
+static u8 vsllink_usb_interface;
+static u8 vsllink_mode = VSLLINK_MODE_NORMAL;
+static int VSLLINK_USB_TIMEOUT = 10000;
 
 static int VSLLINK_BufferSize = 1024;
 
@@ -74,6 +78,7 @@ static u8* vsllink_usb_out_buffer = NULL;
 #define VSLLINK_CMD_HW_JTAGSEQCMD      0xA0
 #define VSLLINK_CMD_HW_JTAGHLCMD       0xA1
 #define VSLLINK_CMD_HW_SWDCMD          0xA2
+#define VSLLINK_CMD_HW_JTAGRAWCMD      0xA3
 
 #define VSLLINK_CMDJTAGSEQ_TMSBYTE     0x00
 #define VSLLINK_CMDJTAGSEQ_TMSCLOCK    0x40
@@ -101,7 +106,7 @@ static u8* vsllink_usb_out_buffer = NULL;
  * 3: Pause-DR
  * 4: Shift-IR
  * 5: Pause-IR
- *
+ * 
  * SD->SD and SI->SI have to be caught in interface specific code
  */
 static u8 VSLLINK_tap_move[6][6] =
@@ -110,9 +115,9 @@ static u8 VSLLINK_tap_move[6][6] =
        {0xff, 0x7f, 0x2f, 0x0a, 0x37, 0x16},   /* TLR */
        {0xff, 0x00, 0x45, 0x05, 0x4b, 0x0b},   /* RTI */
        {0xff, 0x61, 0x00, 0x01, 0x0f, 0x2f},   /* SD  */
-       {0xff, 0x60, 0x40, 0x5c, 0x3c, 0x5e},   /* PD  */
+       {0xfe, 0x60, 0x40, 0x5c, 0x3c, 0x5e},   /* PD  */
        {0xff, 0x61, 0x07, 0x17, 0x00, 0x01},   /* SI  */
-       {0xff, 0x60, 0x38, 0x5c, 0x40, 0x5e}    /* PI  */
+       {0xfe, 0x60, 0x38, 0x5c, 0x40, 0x5e}    /* PI  */
 };
 
 typedef struct insert_insignificant_operation
@@ -175,8 +180,8 @@ static u8 VSLLINK_BIT_MSK[8] =
 
 typedef struct
 {
-       int length; /* Number of bits to read */
        int offset;
+       int length; /* Number of bits to read */
        scan_command_t *command; /* Corresponding scan command */
        u8 *buffer;
 } pending_scan_result_t;
@@ -200,22 +205,42 @@ static int vsllink_handle_usb_vid_command(struct command_context_s *cmd_ctx, cha
 static int vsllink_handle_usb_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 static int vsllink_handle_usb_bulkin_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 static int vsllink_handle_usb_bulkout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+static int vsllink_handle_usb_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
+static int vsllink_handle_mode_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
 
 /* Queue command functions */
 static void vsllink_end_state(tap_state_t state);
-static void vsllink_state_move(void);
-static void vsllink_path_move(int num_states, tap_state_t *path);
+static void vsllink_state_move_dma(void);
+static void vsllink_state_move_normal(void);
+static void (*vsllink_state_move)(void);
+static void vsllink_path_move_dma(int num_states, tap_state_t *path);
+static void vsllink_path_move_normal(int num_states, tap_state_t *path);
+static void (*vsllink_path_move)(int num_states, tap_state_t *path);
 static void vsllink_runtest(int num_cycles);
-static void vsllink_stableclocks(int num_cycles, int tms);
-static void vsllink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
+static void vsllink_stableclocks_dma(int num_cycles, int tms);
+static void vsllink_stableclocks_normal(int num_cycles, int tms);
+static void (*vsllink_stableclocks)(int num_cycles, int tms);
+static void vsllink_scan_dma(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
+static void vsllink_scan_normal(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
+static void (*vsllink_scan)(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
 static void vsllink_reset(int trst, int srst);
 static void vsllink_simple_command(u8 command);
+static int vsllink_connect(void);
+static int vsllink_disconnect(void);
 
 /* VSLLink tap buffer functions */
-static void vsllink_tap_init(void);
-static int vsllink_tap_execute(void);
-static void vsllink_tap_ensure_space(int scans, int bytes);
-static void vsllink_tap_append_scan(int length, u8 *buffer, scan_command_t *command, int offset);
+static void vsllink_tap_append_step(int tms, int tdi);
+static void vsllink_tap_init_dma(void);
+static void vsllink_tap_init_normal(void);
+static void (*vsllink_tap_init)(void);
+static int vsllink_tap_execute_dma(void);
+static int vsllink_tap_execute_normal(void);
+static int (*vsllink_tap_execute)(void);
+static void vsllink_tap_ensure_space_dma(int scans, int length);
+static void vsllink_tap_ensure_space_normal(int scans, int length);
+static void (*vsllink_tap_ensure_space)(int scans, int length);
+static void vsllink_tap_append_scan_dma(int length, u8 *buffer, scan_command_t *command);
+static void vsllink_tap_append_scan_normal(int length, u8 *buffer, scan_command_t *command, int offset);
 
 /* VSLLink lowlevel functions */
 typedef struct vsllink_jtag
@@ -236,7 +261,14 @@ static void vsllink_debug_buffer(u8 *buffer, int length);
 static int vsllink_tms_data_len = 0;
 static u8* vsllink_tms_cmd_pos;
 
-static vsllink_jtag_t* vsllink_jtag_handle;
+static int tap_length = 0;
+static int tap_buffer_size = 0;
+static u8 *tms_buffer = NULL;
+static u8 *tdi_buffer = NULL;
+static u8 *tdo_buffer = NULL;
+static int last_tms;
+
+static vsllink_jtag_t* vsllink_jtag_handle = NULL;
 
 /***************************************************************************/
 /* External interface implementation */
@@ -253,6 +285,19 @@ jtag_interface_t vsllink_interface =
        .quit = vsllink_quit
 };
 
+static void reset_command_pointer(void)
+{
+       if (vsllink_mode == VSLLINK_MODE_NORMAL)
+       {
+               vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGSEQCMD;
+               vsllink_usb_out_buffer_idx = 3;
+       }
+       else
+       {
+               tap_length = 0;
+       }
+}
+
 static int vsllink_execute_queue(void)
 {
        jtag_command_t *cmd = jtag_command_queue;
@@ -262,56 +307,55 @@ static int vsllink_execute_queue(void)
 
        DEBUG_JTAG_IO("--------------------------------- vsllink -------------------------------------");
 
-       vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGSEQCMD;
-       vsllink_usb_out_buffer_idx = 3;
+       reset_command_pointer();
        while (cmd != NULL)
        {
                switch (cmd->type)
                {
                        case JTAG_END_STATE:
                                DEBUG_JTAG_IO("end_state: %s", tap_state_name(cmd->cmd.end_state->end_state));
-
+                       
                                if (cmd->cmd.end_state->end_state != TAP_INVALID)
                                {
                                        vsllink_end_state(cmd->cmd.end_state->end_state);
                                }
                                break;
-
+                               
                        case JTAG_RUNTEST:
                                DEBUG_JTAG_IO( "runtest %i cycles, end in %s", cmd->cmd.runtest->num_cycles, \
                                        tap_state_name(cmd->cmd.runtest->end_state));
-
+                                       
                                if (cmd->cmd.runtest->end_state != TAP_INVALID)
                                {
                                        vsllink_end_state(cmd->cmd.runtest->end_state);
                                }
                                vsllink_runtest(cmd->cmd.runtest->num_cycles);
                                break;
-
+                               
                        case JTAG_STATEMOVE:
                                DEBUG_JTAG_IO("statemove end in %s", tap_state_name(cmd->cmd.statemove->end_state));
-
+                               
                                if (cmd->cmd.statemove->end_state != TAP_INVALID)
                                {
                                        vsllink_end_state(cmd->cmd.statemove->end_state);
                                }
                                vsllink_state_move();
                                break;
-
+                               
                        case JTAG_PATHMOVE:
                                DEBUG_JTAG_IO("pathmove: %i states, end in %s", \
                                        cmd->cmd.pathmove->num_states, \
                                        tap_state_name(cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]));
-
+                                       
                                vsllink_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
                                break;
-
+                               
                        case JTAG_SCAN:
                                if (cmd->cmd.scan->end_state != TAP_INVALID)
                                {
                                        vsllink_end_state(cmd->cmd.scan->end_state);
                                }
-
+                               
                                scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
                                if (cmd->cmd.scan->ir_scan)
                                {
@@ -321,37 +365,34 @@ static int vsllink_execute_queue(void)
                                {
                                        DEBUG_JTAG_IO("JTAG Scan write DR(%d bits), end in %s:", scan_size, tap_state_name(cmd->cmd.scan->end_state));
                                }
-
+                               
 #ifdef _DEBUG_JTAG_IO_
                                vsllink_debug_buffer(buffer, (scan_size + 7) >> 3);
 #endif
-
+                               
                                type = jtag_scan_type(cmd->cmd.scan);
-
+                               
                                vsllink_scan(cmd->cmd.scan->ir_scan, type, buffer, scan_size, cmd->cmd.scan);
                                break;
-
+                               
                        case JTAG_RESET:
                                DEBUG_JTAG_IO("reset trst: %i srst %i", cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-
+                               
                                vsllink_tap_execute();
-
+                               
                                if (cmd->cmd.reset->trst == 1)
                                {
                                        tap_set_state(TAP_RESET);
                                }
                                vsllink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-
-                               vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGSEQCMD;
-                               vsllink_usb_out_buffer_idx = 3;
                                break;
-
+                               
                        case JTAG_SLEEP:
                                DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
                                vsllink_tap_execute();
                                jtag_sleep(cmd->cmd.sleep->us);
                                break;
-
+                               
                        case JTAG_STABLECLOCKS:
                                DEBUG_JTAG_IO("add %d clocks", cmd->cmd.stableclocks->num_cycles);
                                switch(tap_get_state())
@@ -375,27 +416,27 @@ static int vsllink_execute_queue(void)
                                }
                                vsllink_stableclocks(cmd->cmd.stableclocks->num_cycles, scan_size);
                                break;
-
+                               
                        default:
                                LOG_ERROR("BUG: unknown JTAG command type encountered: %d", cmd->type);
                                exit(-1);
                }
                cmd = cmd->next;
        }
-
+       
        return vsllink_tap_execute();
 }
 
 static int vsllink_speed(int speed)
 {
        int result;
-
+       
        vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_SPEED;
        vsllink_usb_out_buffer[1] = (speed >> 0) & 0xff;
        vsllink_usb_out_buffer[2] = (speed >> 8) & 0xFF;
-
+       
        result = vsllink_usb_write(vsllink_jtag_handle, 3);
-
+       
        if (result == 3)
        {
                return ERROR_OK;
@@ -405,44 +446,30 @@ static int vsllink_speed(int speed)
                LOG_ERROR("VSLLink setting speed failed (%d)", result);
                return ERROR_JTAG_DEVICE_ERROR;
        }
-
+       
        return ERROR_OK;
 }
 
 static int vsllink_khz(int khz, int *jtag_speed)
 {
        *jtag_speed = khz;
-
+       
        return ERROR_OK;
 }
 
 static int vsllink_speed_div(int jtag_speed, int *khz)
 {
        *khz = jtag_speed;
-
-       return ERROR_OK;
-}
-
-static int vsllink_register_commands(struct command_context_s *cmd_ctx)
-{
-       register_command(cmd_ctx, NULL, "vsllink_usb_vid", vsllink_handle_usb_vid_command,
-                                       COMMAND_CONFIG, NULL);
-       register_command(cmd_ctx, NULL, "vsllink_usb_pid", vsllink_handle_usb_pid_command,
-                                       COMMAND_CONFIG, NULL);
-       register_command(cmd_ctx, NULL, "vsllink_usb_bulkin", vsllink_handle_usb_bulkin_command,
-                                       COMMAND_CONFIG, NULL);
-       register_command(cmd_ctx, NULL, "vsllink_usb_bulkout", vsllink_handle_usb_bulkout_command,
-                                       COMMAND_CONFIG, NULL);
-
+       
        return ERROR_OK;
 }
 
 static int vsllink_init(void)
 {
-       int check_cnt;
+       int check_cnt, to_tmp;
        int result;
        char version_str[100];
-
+       
        vsllink_usb_in_buffer = malloc(VSLLINK_BufferSize);
        vsllink_usb_out_buffer = malloc(VSLLINK_BufferSize);
        if ((vsllink_usb_in_buffer == NULL) || (vsllink_usb_out_buffer == NULL))
@@ -450,34 +477,37 @@ static int vsllink_init(void)
                LOG_ERROR("Not enough memory");
                exit(-1);
        }
-
+       
        vsllink_jtag_handle = vsllink_usb_open();
-
+       
        if (vsllink_jtag_handle == 0)
        {
                LOG_ERROR("Can't find USB JTAG Interface! Please check connection and permissions.");
                return ERROR_JTAG_INIT_FAILED;
        }
-
+       LOG_DEBUG("vsllink found on %04X:%04X", vsllink_usb_vid, vsllink_usb_pid);
+       
+       to_tmp = VSLLINK_USB_TIMEOUT;
+       VSLLINK_USB_TIMEOUT = 100;
        check_cnt = 0;
-       while (check_cnt < 3)
+       while (check_cnt < 5)
        {
-               vsllink_simple_command(VSLLINK_CMD_CONN);
+               vsllink_simple_command(0x00);
                result = vsllink_usb_read(vsllink_jtag_handle);
-
+               
                if (result > 2)
                {
                        vsllink_usb_in_buffer[result] = 0;
                        VSLLINK_BufferSize = vsllink_usb_in_buffer[0] + (vsllink_usb_in_buffer[1] << 8);
                        strncpy(version_str, (char *)vsllink_usb_in_buffer + 2, sizeof(version_str));
                        LOG_INFO("%s", version_str);
-
+                       
                        // free the pre-alloc memroy
                        free(vsllink_usb_in_buffer);
                        free(vsllink_usb_out_buffer);
                        vsllink_usb_in_buffer = NULL;
                        vsllink_usb_out_buffer = NULL;
-
+                       
                        // alloc new memory
                        vsllink_usb_in_buffer = malloc(VSLLINK_BufferSize);
                        vsllink_usb_out_buffer = malloc(VSLLINK_BufferSize);
@@ -490,20 +520,64 @@ static int vsllink_init(void)
                        {
                                LOG_INFO("buffer size for USB is %d bytes", VSLLINK_BufferSize);
                        }
+                       // alloc memory for dma mode
+                       if (vsllink_mode == VSLLINK_MODE_DMA)
+                       {
+                               tap_buffer_size = (VSLLINK_BufferSize - 3) / 2;
+                               tms_buffer = (u8*)malloc(tap_buffer_size);
+                               tdi_buffer = (u8*)malloc(tap_buffer_size);
+                               tdo_buffer = (u8*)malloc(tap_buffer_size);
+                               if ((tms_buffer == NULL) || (tdi_buffer == NULL) || (tdo_buffer == NULL))
+                               {
+                                       LOG_ERROR("Not enough memory");
+                                       exit(-1);
+                               }
+                       }
                        break;
                }
                vsllink_simple_command(VSLLINK_CMD_DISCONN);
-
                check_cnt++;
        }
-
        if (check_cnt == 3)
        {
                // It's dangerout to proced
                LOG_ERROR("VSLLink initial failed");
                exit(-1);
        }
-
+       VSLLINK_USB_TIMEOUT = to_tmp;
+       
+       // connect to vsllink
+       vsllink_connect();
+       // initialize function pointers
+       if (vsllink_mode == VSLLINK_MODE_NORMAL)
+       {
+               // normal mode
+               vsllink_state_move = vsllink_state_move_normal;
+               vsllink_path_move = vsllink_path_move_normal;
+               vsllink_stableclocks = vsllink_stableclocks_normal;
+               vsllink_scan = vsllink_scan_normal;
+               
+               vsllink_tap_init = vsllink_tap_init_normal;
+               vsllink_tap_execute = vsllink_tap_execute_normal;
+               vsllink_tap_ensure_space = vsllink_tap_ensure_space_normal;
+               
+               LOG_INFO("vsllink run in NORMAL mode");
+       }
+       else
+       {
+               // dma mode
+               vsllink_state_move = vsllink_state_move_dma;
+               vsllink_path_move = vsllink_path_move_dma;
+               vsllink_stableclocks = vsllink_stableclocks_dma;
+               vsllink_scan = vsllink_scan_dma;
+               
+               vsllink_tap_init = vsllink_tap_init_dma;
+               vsllink_tap_execute = vsllink_tap_execute_dma;
+               vsllink_tap_ensure_space = vsllink_tap_ensure_space_dma;
+               
+               LOG_INFO("vsllink run in DMA mode");
+       }
+       
        // Set SRST and TRST to output, Set USR1 and USR2 to input
        vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_PORTDIR;
        vsllink_usb_out_buffer[1] = JTAG_PINMSK_SRST | JTAG_PINMSK_TRST | JTAG_PINMSK_USR1 | JTAG_PINMSK_USR2;
@@ -513,13 +587,13 @@ static int vsllink_init(void)
                LOG_ERROR("VSLLink USB send data error");
                exit(-1);
        }
-
+       
        vsllink_reset(0, 0);
-
+       
        LOG_INFO("VSLLink JTAG Interface ready");
-
+       
        vsllink_tap_init();
-
+       
        return ERROR_OK;
 }
 
@@ -536,20 +610,48 @@ static int vsllink_quit(void)
                        LOG_ERROR("VSLLink USB send data error");
                        exit(-1);
                }
-
+               
                // disconnect
-               vsllink_simple_command(VSLLINK_CMD_DISCONN);
+               vsllink_disconnect();
                vsllink_usb_close(vsllink_jtag_handle);
+               vsllink_jtag_handle = NULL;
        }
-
+       
        if (vsllink_usb_in_buffer != NULL)
        {
                free(vsllink_usb_in_buffer);
+               vsllink_usb_in_buffer = NULL;
        }
        if (vsllink_usb_out_buffer != NULL)
        {
                free(vsllink_usb_out_buffer);
+               vsllink_usb_out_buffer = NULL;
        }
+       
+       return ERROR_OK;
+}
+
+/***************************************************************************/
+/* Queue command implementations */
+static int vsllink_disconnect(void)
+{
+       vsllink_simple_command(VSLLINK_CMD_DISCONN);
+       return ERROR_OK;
+}
+
+static int vsllink_connect(void)
+{
+       char vsllink_str[100];
+       
+       vsllink_usb_out_buffer[0] = VSLLINK_CMD_CONN;
+       vsllink_usb_out_buffer[1] = vsllink_mode;
+       vsllink_usb_message(vsllink_jtag_handle, 2, 0);
+       if (vsllink_usb_read(vsllink_jtag_handle) > 2)
+       {
+               strncpy(vsllink_str, (char *)vsllink_usb_in_buffer + 2, sizeof(vsllink_str));
+               LOG_INFO("%s", vsllink_str);
+       }
+       
        return ERROR_OK;
 }
 
@@ -559,8 +661,9 @@ static void vsllink_append_tms(void)
 {
        u8 tms_scan = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
        u16 tms2;
-       tap_state_t     end_state = tap_get_end_state();
-
+       insert_insignificant_operation_t *insert = \
+               &VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())];
+               
        if (((tap_get_state() != TAP_RESET) && (tap_get_state() != TAP_IDLE) && (tap_get_state() != TAP_DRPAUSE) && (tap_get_state() != TAP_IRPAUSE)) || \
                        (vsllink_tms_data_len <= 0) || (vsllink_tms_data_len >= 8) || \
                        (vsllink_tms_cmd_pos == NULL))
@@ -568,27 +671,24 @@ static void vsllink_append_tms(void)
                LOG_ERROR("There MUST be some bugs in the driver");
                exit(-1);
        }
-
-       tms2 = (tms_scan & VSLLINK_BIT_MSK[VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(end_state)].insert_position]) << \
+       
+       tms2 = (tms_scan & VSLLINK_BIT_MSK[insert->insert_position]) << \
                                vsllink_tms_data_len;
-       if (VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(end_state)].insert_value == 1)
+       if (insert->insert_value == 1)
        {
                tms2 |= VSLLINK_BIT_MSK[8 - vsllink_tms_data_len] << \
-                               (vsllink_tms_data_len + VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(end_state)].insert_position);
+                               (vsllink_tms_data_len + insert->insert_position);
        }
-       tms2 |= (tms_scan >> VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(end_state)].insert_position) << \
-                               (8 + VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(end_state)].insert_position);
-
+       tms2 |= (tms_scan >> insert->insert_position) << \
+                               (8 + insert->insert_position);
+                               
        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (tms2 >> 0) & 0xff;
        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms2 >> 8) & 0xff;
-
+       
        vsllink_tms_data_len = 0;
        vsllink_tms_cmd_pos = NULL;
 }
 
-/***************************************************************************/
-/* Queue command implementations */
-
 static void vsllink_end_state(tap_state_t state)
 {
        if (tap_is_state_stable(state))
@@ -603,7 +703,7 @@ static void vsllink_end_state(tap_state_t state)
 }
 
 /* Goes to the end state. */
-static void vsllink_state_move(void)
+static void vsllink_state_move_normal(void)
 {
        if (vsllink_tms_data_len > 0)
        {
@@ -612,11 +712,57 @@ static void vsllink_state_move(void)
        else
        {
                vsllink_tap_ensure_space(0, 2);
-
+               
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE;
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
        }
-
+       
+       tap_set_state(tap_get_end_state());
+}
+static void vsllink_state_move_dma(void)
+{
+       int i, insert_length = (tap_length % 8) ? (8 - (tap_length % 8)) : 0;
+       insert_insignificant_operation_t *insert = \
+               &VSLLINK_TAP_MOVE_INSERT_INSIGNIFICANT[tap_move_ndx(tap_get_state())][tap_move_ndx(tap_get_end_state())];
+       u8 tms_scan = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
+       
+       vsllink_tap_ensure_space(0, 8);
+       
+       if (tap_get_state() == TAP_RESET)
+       {
+               for (i = 0; i < 8; i++)
+               {
+                       vsllink_tap_append_step(1, 0);
+               }
+       }
+       
+       if (insert_length > 0)
+       {
+               vsllink_tap_ensure_space(0, 16);
+               
+               for (i = 0; i < insert->insert_position; i++)
+               {
+                       vsllink_tap_append_step((tms_scan >> i) & 1, 0);
+               }
+               for (i = 0; i < insert_length; i++)
+               {
+                       vsllink_tap_append_step(insert->insert_value, 0);
+               }
+               for (i = insert->insert_position; i < 8; i++)
+               {
+                       vsllink_tap_append_step((tms_scan >> i) & 1, 0);
+               }
+       }
+       else
+       {
+               vsllink_tap_ensure_space(0, 8);
+               
+               for (i = 0; i < 8; i++)
+               {
+                       vsllink_tap_append_step((tms_scan >> i) & 1, 0);
+               }
+       }
+       
        tap_set_state(tap_get_end_state());
 }
 
@@ -624,7 +770,7 @@ static void vsllink_state_move(void)
 static void vsllink_add_path(int start, int num, tap_state_t *path)
 {
        int i;
-
+       
        for (i = start; i < (start + num); i++)
        {
                if ((i & 7) == 0)
@@ -635,7 +781,7 @@ static void vsllink_add_path(int start, int num, tap_state_t *path)
                        }
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = 0;
                }
-
+               
                if (path[i - start] == tap_state_transition(tap_get_state(), true))
                {
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] |= 1 << (i & 7);
@@ -656,14 +802,14 @@ static void vsllink_add_path(int start, int num, tap_state_t *path)
                vsllink_usb_out_buffer_idx++;
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] = 0;
        }
-
+       
        tap_set_end_state(tap_get_state());
 }
 
-static void vsllink_path_move(int num_states, tap_state_t *path)
+static void vsllink_path_move_normal(int num_states, tap_state_t *path)
 {
        int i, tms_len, tms_cmd_pos, path_idx = 0;
-
+       
        if (vsllink_tms_data_len > 0)
        {
                // there are vsllink_tms_data_len more tms bits to be shifted
@@ -714,7 +860,7 @@ static void vsllink_path_move(int num_states, tap_state_t *path)
                                // end last tms shift command
                                vsllink_add_path(vsllink_tms_data_len, num_states, path);
                        }
-
+                       
                        vsllink_tms_data_len = (vsllink_tms_data_len + num_states) & 7;
                        if (vsllink_tms_data_len == 0)
                        {
@@ -725,19 +871,19 @@ static void vsllink_path_move(int num_states, tap_state_t *path)
                else
                {
                        vsllink_add_path(vsllink_tms_data_len, 16 - vsllink_tms_data_len, path);
-
+                       
                        path += 16 - vsllink_tms_data_len;
                        num_states -= 16 - vsllink_tms_data_len;
                        vsllink_tms_data_len = 0;
                        vsllink_tms_cmd_pos = NULL;
                }
        }
-
+       
        if (num_states > 0)
        {
                // Normal operation, don't need to append tms data
                vsllink_tms_data_len = num_states & 7;
-
+               
                while (num_states > 0)
                {
                        if (num_states > ((VSLLINK_CMDJTAGSEQ_LENMSK + 1) * 8))
@@ -752,13 +898,13 @@ static void vsllink_path_move(int num_states, tap_state_t *path)
                        vsllink_tap_ensure_space(0, tms_len + 2);
                        tms_cmd_pos = vsllink_usb_out_buffer_idx;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_TMSBYTE | (tms_len - 1);
-
+                       
                        vsllink_add_path(0, i, path + path_idx);
-
+                       
                        path_idx += i;
                        num_states -= i;
                }
-
+               
                if (vsllink_tms_data_len > 0)
                {
                        if (tms_len < (VSLLINK_CMDJTAGSEQ_LENMSK + 1))
@@ -769,7 +915,7 @@ static void vsllink_path_move(int num_states, tap_state_t *path)
                        else
                        {
                                vsllink_usb_out_buffer[tms_cmd_pos]--;
-
+                               
                                tms_len = vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
                                vsllink_tap_ensure_space(0, 3);
                                vsllink_tms_cmd_pos = &vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
@@ -779,12 +925,71 @@ static void vsllink_path_move(int num_states, tap_state_t *path)
                }
        }
 }
+static void vsllink_path_move_dma(int num_states, tap_state_t *path)
+{
+       int i, j = 0;
+       
+       if (tap_length & 7)
+       {
+               if ((8 - (tap_length & 7)) < num_states)
+               {
+                       j = 8 - (tap_length & 7);
+               }
+               else
+               {
+                       j = num_states;
+               }
+               for (i = 0; i < j; i++)
+               {
+                       if (path[i] == tap_state_transition(tap_get_state(), false))
+                       {
+                               vsllink_tap_append_step(0, 0);
+                       }
+                       else if (path[i] == tap_state_transition(tap_get_state(), true))
+                       {
+                               vsllink_tap_append_step(1, 0);
+                       }
+                       else
+                       {
+                               LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(path[i]));
+                               exit(-1);
+                       }
+                       tap_set_state(path[i]);
+               }
+               num_states -= j;
+       }
+       
+       if (num_states > 0)
+       {
+               vsllink_tap_ensure_space(0, num_states);
+               
+               for (i = 0; i < num_states; i++)
+               {
+                       if (path[j + i] == tap_state_transition(tap_get_state(), false))
+                       {
+                               vsllink_tap_append_step(0, 0);
+                       }
+                       else if (path[j + i] == tap_state_transition(tap_get_state(), true))
+                       {
+                               vsllink_tap_append_step(1, 0);
+                       }
+                       else
+                       {
+                               LOG_ERROR("BUG: %s -> %s isn't a valid TAP transition", tap_state_name(tap_get_state()), tap_state_name(path[i]));
+                               exit(-1);
+                       }
+                       tap_set_state(path[j + i]);
+               }
+       }
+       
+       tap_set_end_state(tap_get_state());
+}
 
-static void vsllink_stableclocks(int num_cycles, int tms)
+static void vsllink_stableclocks_normal(int num_cycles, int tms)
 {
        int tms_len;
        u16 tms_append_byte;
-
+       
        if (vsllink_tms_data_len > 0)
        {
                // there are vsllink_tms_data_len more tms bits to be shifted
@@ -850,7 +1055,7 @@ static void vsllink_stableclocks(int num_cycles, int tms)
                                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (u8)(tms_append_byte & 0xFF);
                                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (u8)(tms_append_byte >> 8);
                        }
-
+                       
                        vsllink_tms_data_len = tms_len & 7;
                        if (vsllink_tms_data_len == 0)
                        {
@@ -863,14 +1068,14 @@ static void vsllink_stableclocks(int num_cycles, int tms)
                        // more shifts will be needed
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] |= (u8)(tms_append_byte & 0xFF);
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (u8)(tms_append_byte >> 8);
-
+                       
                        num_cycles -= 16 - vsllink_tms_data_len;
                        vsllink_tms_data_len = 0;
                        vsllink_tms_cmd_pos = NULL;
                }
        }
        // from here vsllink_tms_data_len == 0 or num_cycles == 0
-
+       
        if (vsllink_tms_data_len > 0)
        {
                // num_cycles == 0
@@ -903,17 +1108,17 @@ static void vsllink_stableclocks(int num_cycles, int tms)
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 8) & 0xff;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 16) & 0xff;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tms_len >> 24) & 0xff;
-
+                       
                        vsllink_usb_in_want_length += 1;
                        pending_scan_results_buffer[pending_scan_results_length].buffer = NULL;
                        pending_scan_results_length++;
-
+                       
                        if (tms_len > 0xFFFF)
                        {
                                vsllink_tap_execute();
                        }
                }
-
+               
                // post-process
                vsllink_tms_data_len = num_cycles & 7;
                if (vsllink_tms_data_len > 0)
@@ -934,20 +1139,62 @@ static void vsllink_stableclocks(int num_cycles, int tms)
                }
        }
 }
+static void vsllink_stableclocks_dma(int num_cycles, int tms)
+{
+       int i, cur_cycles;
+       
+       if (tap_length & 7)
+       {
+               if ((8 - (tap_length & 7)) < num_cycles)
+               {
+                       cur_cycles = 8 - (tap_length & 7);
+               }
+               else
+               {
+                       cur_cycles = num_cycles;
+               }
+               for (i = 0; i < cur_cycles; i++)
+               {
+                       vsllink_tap_append_step(tms, 0);
+               }
+               num_cycles -= cur_cycles;
+       }
+       
+       while (num_cycles > 0)
+       {
+               if (num_cycles > 8 * tap_buffer_size)
+               {
+                       cur_cycles = 8 * tap_buffer_size;
+               }
+               else
+               {
+                       cur_cycles = num_cycles;
+               }
+               
+               vsllink_tap_ensure_space(0, cur_cycles);
+               
+               for (i = 0; i < cur_cycles; i++)
+               {
+                       vsllink_tap_append_step(tms, 0);
+               }
+               
+               num_cycles -= cur_cycles;
+       }
+}
 
 static void vsllink_runtest(int num_cycles)
 {
        tap_state_t saved_end_state = tap_get_end_state();
-
+       
        if (tap_get_state() != TAP_IDLE)
        {
                // enter into IDLE state
                vsllink_end_state(TAP_IDLE);
                vsllink_state_move();
        }
-
+       
        vsllink_stableclocks(num_cycles, 0);
-
+       
        // post-process
        // set end_state
        vsllink_end_state(saved_end_state);
@@ -958,29 +1205,29 @@ static void vsllink_runtest(int num_cycles)
        }
 }
 
-static void vsllink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
+static void vsllink_scan_normal(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
 {
        tap_state_t saved_end_state;
        u8 bits_left, tms_tmp, tdi_len;
        int i;
-
+       
        if (0 == scan_size )
        {
                return;
        }
-
+       
        tdi_len = ((scan_size + 7) >> 3);
        if ((tdi_len + 7) > VSLLINK_BufferSize)
        {
                LOG_ERROR("Your implementation of VSLLink has not enough buffer");
                exit(-1);
        }
-
+       
        saved_end_state = tap_get_end_state();
-
+       
        /* Move to appropriate scan state */
        vsllink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
-
+       
        if (vsllink_tms_data_len > 0)
        {
                if (tap_get_state() == tap_get_end_state())
@@ -1002,16 +1249,16 @@ static void vsllink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_
                                tms_tmp = vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx];
                                *vsllink_tms_cmd_pos -= 2;
                        }
-
+                       
                        vsllink_tap_ensure_space(1, tdi_len + 7);
-                       // VSLLINK_CMDJTAGSEQ_SCAN ored by 1 means that tms_before is valid
+                       // VSLLINK_CMDJTAGSEQ_SCAN ored by 1 means that tms_before is valid 
                        // which is merged from the last tms shift command
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_SCAN | 1;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1) >> 0) & 0xff;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1)>> 8) & 0xff;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = tms_tmp;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = buffer[0] << (8 - vsllink_tms_data_len);
-
+                       
                        for (i = 0; i < tdi_len; i++)
                        {
                                buffer[i] >>= 8 - vsllink_tms_data_len;
@@ -1020,40 +1267,40 @@ static void vsllink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_
                                        buffer[i] += buffer[i + 1] << vsllink_tms_data_len;
                                }
                        }
-
-                       vsllink_tap_append_scan(scan_size - vsllink_tms_data_len, buffer, command, vsllink_tms_data_len);
+                       
+                       vsllink_tap_append_scan_normal(scan_size - vsllink_tms_data_len, buffer, command, vsllink_tms_data_len);
                        scan_size -= 8 - vsllink_tms_data_len;
                        vsllink_tms_data_len = 0;
                }
                else
                {
-                       vsllink_append_tms();
+                       vsllink_state_move();
                        vsllink_tap_ensure_space(1, tdi_len + 5);
-
+                       
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_SCAN;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tdi_len >> 0) & 0xff;
                        vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = (tdi_len >> 8) & 0xff;
-
-                       vsllink_tap_append_scan(scan_size, buffer, command, 0);
+                       
+                       vsllink_tap_append_scan_normal(scan_size, buffer, command, 0);
                }
        }
        else
        {
                vsllink_tap_ensure_space(1, tdi_len + 7);
-
+               
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_CMDJTAGSEQ_SCAN | 1;
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1) >> 0) & 0xff;
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = ((tdi_len + 1)>> 8) & 0xff;
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 0;
-
-               vsllink_tap_append_scan(scan_size, buffer, command, 8);
+               
+               vsllink_tap_append_scan_normal(scan_size, buffer, command, 8);
        }
        vsllink_end_state(saved_end_state);
-
+       
        bits_left = scan_size & 0x07;
        tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
-
+       
        if (bits_left > 0)
        {
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 1 << (bits_left - 1);
@@ -1062,7 +1309,7 @@ static void vsllink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_
        {
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 1 << 7;
        }
-
+       
        if (tap_get_state() != tap_get_end_state())
        {
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = VSLLINK_TAP_MOVE(tap_get_state(), tap_get_end_state());
@@ -1071,16 +1318,44 @@ static void vsllink_scan(int ir_scan, enum scan_type type, u8 *buffer, int scan_
        {
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = 0;
        }
-
+       
        tap_set_state(tap_get_end_state());
 }
+static void vsllink_scan_dma(int ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
+{
+       tap_state_t saved_end_state;
+       
+       saved_end_state = tap_get_end_state();
+       
+       /* Move to appropriate scan state */
+       vsllink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
+       
+       vsllink_state_move();
+       vsllink_end_state(saved_end_state);
+       
+       /* Scan */
+       vsllink_tap_ensure_space(1, (scan_size + 7) & ~0x00000007);
+       vsllink_tap_append_scan_dma(scan_size, buffer, command);
+       
+       tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
+       while (tap_length % 8 != 0)
+       {
+               // more 0s in Pause
+               vsllink_tap_append_step(0, 0);
+       }
+       
+       if (tap_get_state() != tap_get_end_state())
+       {
+               vsllink_state_move();
+       }
+}
 
 static void vsllink_reset(int trst, int srst)
 {
        int result;
-
+       
        LOG_DEBUG("trst: %i, srst: %i", trst, srst);
-
+       
        /* Signals are active low */
        vsllink_usb_out_buffer[0] = VSLLINK_CMD_SET_PORT;
        vsllink_usb_out_buffer[1] = JTAG_PINMSK_SRST | JTAG_PINMSK_TRST;
@@ -1093,7 +1368,7 @@ static void vsllink_reset(int trst, int srst)
        {
                vsllink_usb_out_buffer[2] |= JTAG_PINMSK_TRST;
        }
-
+       
        result = vsllink_usb_write(vsllink_jtag_handle, 3);
        if (result != 3)
        {
@@ -1104,92 +1379,202 @@ static void vsllink_reset(int trst, int srst)
 static void vsllink_simple_command(u8 command)
 {
        int result;
-
+       
        DEBUG_JTAG_IO("0x%02x", command);
-
+       
        vsllink_usb_out_buffer[0] = command;
        result = vsllink_usb_write(vsllink_jtag_handle, 1);
-
+       
        if (result != 1)
        {
                LOG_ERROR("VSLLink command 0x%02x failed (%d)", command, result);
        }
 }
 
-static int vsllink_handle_usb_vid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+static int vsllink_register_commands(struct command_context_s *cmd_ctx)
+{
+       register_command(cmd_ctx, NULL, "vsllink_usb_vid", vsllink_handle_usb_vid_command, 
+                                       COMMAND_CONFIG, NULL);
+       register_command(cmd_ctx, NULL, "vsllink_usb_pid", vsllink_handle_usb_pid_command, 
+                                       COMMAND_CONFIG, NULL);
+       register_command(cmd_ctx, NULL, "vsllink_usb_bulkin", vsllink_handle_usb_bulkin_command, 
+                                       COMMAND_CONFIG, NULL);
+       register_command(cmd_ctx, NULL, "vsllink_usb_bulkout", vsllink_handle_usb_bulkout_command, 
+                                       COMMAND_CONFIG, NULL);
+       register_command(cmd_ctx, NULL, "vsllink_usb_interface", vsllink_handle_usb_interface_command, 
+                                       COMMAND_CONFIG, NULL);
+       register_command(cmd_ctx, NULL, "vsllink_mode", vsllink_handle_mode_command, 
+                                       COMMAND_CONFIG, NULL);
+                                       
+       return ERROR_OK;
+}
+
+static int vsllink_handle_mode_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
        if (argc != 1) {
                LOG_ERROR("parameter error, should be one parameter for VID");
-               return ERROR_OK;
+               return ERROR_FAIL;
        }
+       
+       if (!strcmp(args[0], "normal"))
+       {
+               vsllink_mode = VSLLINK_MODE_NORMAL;
+       }
+       else if (!strcmp(args[0], "dma"))
+       {
+               vsllink_mode = VSLLINK_MODE_DMA;
+       }
+       else
+       {
+               LOG_ERROR("invalid vsllink_mode: %s", args[0]);
+               return ERROR_FAIL;
+       }
+       
+       return ERROR_OK;
+}
 
-       vsllink_vid = strtol(args[0], NULL, 0);
-
+static int vsllink_handle_usb_vid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+       if (argc != 1)
+       {
+               LOG_ERROR("parameter error, should be one parameter for VID");
+               return ERROR_OK;
+       }
+       
+       vsllink_usb_vid = strtol(args[0], NULL, 0);
+       
        return ERROR_OK;
 }
 
 static int vsllink_handle_usb_pid_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       if (argc != 1) {
+       if (argc != 1)
+       {
                LOG_ERROR("parameter error, should be one parameter for PID");
                return ERROR_OK;
        }
-
-       vsllink_pid = strtol(args[0], NULL, 0);
-
+       
+       vsllink_usb_pid = strtol(args[0], NULL, 0);
+       
        return ERROR_OK;
 }
 
 static int vsllink_handle_usb_bulkin_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       if (argc != 1) {
+       if (argc != 1)
+       {
                LOG_ERROR("parameter error, should be one parameter for BULKIN endpoint");
                return ERROR_OK;
        }
-
-       vsllink_bulkin = strtol(args[0], NULL, 0) | 0x80;
-
+       
+       vsllink_usb_bulkin = strtol(args[0], NULL, 0) | 0x80;
+       
        return ERROR_OK;
 }
 
 static int vsllink_handle_usb_bulkout_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
 {
-       if (argc != 1) {
+       if (argc != 1)
+       {
                LOG_ERROR("parameter error, should be one parameter for BULKOUT endpoint");
                return ERROR_OK;
        }
+       
+       vsllink_usb_bulkout = strtol(args[0], NULL, 0);
+       
+       return ERROR_OK;
+}
 
-       vsllink_bulkout = strtol(args[0], NULL, 0);
-
+static int vsllink_handle_usb_interface_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
+{
+       if (argc != 1)
+       {
+               LOG_ERROR("parameter error, should be one parameter for interface number");
+               return ERROR_OK;
+       }
+       
+       vsllink_usb_interface = strtol(args[0], NULL, 0);
+       
        return ERROR_OK;
 }
 
 /***************************************************************************/
 /* VSLLink tap functions */
 
-static void vsllink_tap_init(void)
+static void vsllink_tap_init_normal(void)
 {
        vsllink_usb_out_buffer_idx = 0;
        vsllink_usb_in_want_length = 0;
        pending_scan_results_length = 0;
 }
+static void vsllink_tap_init_dma(void)
+{
+       tap_length = 0;
+       pending_scan_results_length = 0;
+}
 
-static void vsllink_tap_ensure_space(int scans, int bytes)
+static void vsllink_tap_ensure_space_normal(int scans, int length)
 {
        int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
        int available_bytes = VSLLINK_BufferSize - vsllink_usb_out_buffer_idx;
-
-       if (scans > available_scans || bytes > available_bytes)
+       
+       if (scans > available_scans || length > available_bytes)
+       {
+               vsllink_tap_execute();
+       }
+}
+static void vsllink_tap_ensure_space_dma(int scans, int length)
+{
+       int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
+       int available_bytes = tap_buffer_size * 8 - tap_length;
+       
+       if (scans > available_scans || length > available_bytes)
        {
                vsllink_tap_execute();
        }
 }
 
-static void vsllink_tap_append_scan(int length, u8 *buffer, scan_command_t *command, int offset)
+static void vsllink_tap_append_step(int tms, int tdi)
+{
+       last_tms = tms;
+       int index = tap_length / 8;
+       
+       if (index < tap_buffer_size)
+       {
+               int bit_index = tap_length % 8;
+               u8 bit = 1 << bit_index;
+               
+               if (tms)
+               {
+                       tms_buffer[index] |= bit;
+               }
+               else
+               {
+                       tms_buffer[index] &= ~bit;
+               }
+               
+               if (tdi)
+               {
+                       tdi_buffer[index] |= bit;
+               }
+               else
+               {
+                       tdi_buffer[index] &= ~bit;
+               }
+               
+               tap_length++;
+       }
+       else
+       {
+               LOG_ERROR("buffer overflow, tap_length=%d", tap_length);
+       }
+}
+
+static void vsllink_tap_append_scan_normal(int length, u8 *buffer, scan_command_t *command, int offset)
 {
        pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
        int i;
-
+       
        if (offset > 0)
        {
                vsllink_usb_in_want_length += ((length + 7) >> 3) + 1;
@@ -1202,30 +1587,47 @@ static void vsllink_tap_append_scan(int length, u8 *buffer, scan_command_t *comm
        pending_scan_result->offset = offset;
        pending_scan_result->command = command;
        pending_scan_result->buffer = buffer;
-
+       
        for (i = 0; i < ((length + 7) >> 3); i++)
        {
                vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx++] = buffer[i];
        }
-
+       
+       pending_scan_results_length++;
+}
+static void vsllink_tap_append_scan_dma(int length, u8 *buffer, scan_command_t *command)
+{
+       pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[pending_scan_results_length];
+       int i;
+       
+       pending_scan_result->offset = tap_length;
+       pending_scan_result->length = length;
+       pending_scan_result->command = command;
+       pending_scan_result->buffer = buffer;
+       
+       for (i = 0; i < length; i++)
+       {
+               vsllink_tap_append_step((i < length-1 ? 0 : 1), (buffer[i/8] >> (i%8)) & 1);
+       }
+       
        pending_scan_results_length++;
 }
 
 /* Pad and send a tap sequence to the device, and receive the answer.
  * For the purpose of padding we assume that we are in reset or idle or pause state. */
-static int vsllink_tap_execute(void)
+static int vsllink_tap_execute_normal(void)
 {
        int i;
        int result;
        int first = 0;
-
+       
        if (vsllink_tms_data_len > 0)
        {
                if((tap_get_state() != TAP_RESET) && (tap_get_state() != TAP_IDLE) && (tap_get_state() != TAP_IRPAUSE) && (tap_get_state() != TAP_DRPAUSE))
                {
                        LOG_WARNING("%s is not in RESET or IDLE or PAUSR state", tap_state_name(tap_get_state()));
                }
-
+               
                if (vsllink_usb_out_buffer[vsllink_usb_out_buffer_idx] & (1 << (vsllink_tms_data_len - 1)))
                {
                        // last tms bit is '1'
@@ -1241,7 +1643,7 @@ static int vsllink_tap_execute(void)
                        vsllink_tms_data_len = 0;
                }
        }
-
+       
        if (vsllink_usb_out_buffer_idx > 3)
        {
                if (vsllink_usb_out_buffer[0] == VSLLINK_CMD_HW_JTAGSEQCMD)
@@ -1249,9 +1651,9 @@ static int vsllink_tap_execute(void)
                        vsllink_usb_out_buffer[1] = (vsllink_usb_out_buffer_idx >> 0) & 0xff;
                        vsllink_usb_out_buffer[2] = (vsllink_usb_out_buffer_idx >> 8) & 0xff;
                }
-
+               
                result = vsllink_usb_message(vsllink_jtag_handle, vsllink_usb_out_buffer_idx, vsllink_usb_in_want_length);
-
+               
                if (result == vsllink_usb_in_want_length)
                {
                        for (i = 0; i < pending_scan_results_length; i++)
@@ -1261,24 +1663,24 @@ static int vsllink_tap_execute(void)
                                int length = pending_scan_result->length;
                                int offset = pending_scan_result->offset;
                                scan_command_t *command = pending_scan_result->command;
-
+                               
                                if (buffer != NULL)
                                {
                                        // IRSHIFT or DRSHIFT
                                        buf_set_buf(vsllink_usb_in_buffer, first * 8 + offset, buffer, 0, length);
                                        first += (length + offset + 7) >> 3;
-
+                                       
                                        DEBUG_JTAG_IO("JTAG scan read(%d bits):", length);
 #ifdef _DEBUG_JTAG_IO_
                                        vsllink_debug_buffer(buffer, (length + 7) >> 3);
 #endif
-
+                                       
                                        if (jtag_read_buffer(buffer, command) != ERROR_OK)
                                        {
                                                vsllink_tap_init();
                                                return ERROR_JTAG_QUEUE_FAILED;
                                        }
-
+                                       
                                        free(pending_scan_result->buffer);
                                        pending_scan_result->buffer = NULL;
                                }
@@ -1293,68 +1695,162 @@ static int vsllink_tap_execute(void)
                        LOG_ERROR("vsllink_tap_execute, wrong result %d, expected %d", result, vsllink_usb_in_want_length);
                        return ERROR_JTAG_QUEUE_FAILED;
                }
-
+               
                vsllink_tap_init();
        }
-
-       vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGSEQCMD;
-       vsllink_usb_out_buffer_idx = 3;
-
+       reset_command_pointer();
+       
+       return ERROR_OK;
+}
+static int vsllink_tap_execute_dma(void)
+{
+       int byte_length;
+       int i;
+       int result;
+       
+       if (tap_length > 0)
+       {
+               /* Pad last byte so that tap_length is divisible by 8 */
+               while (tap_length % 8 != 0)
+               {
+                       /* More of the last TMS value keeps us in the same state,
+                        * analogous to free-running JTAG interfaces. */
+                       vsllink_tap_append_step(last_tms, 0);
+               }
+               byte_length = tap_length / 8;
+               
+               vsllink_usb_out_buffer[0] = VSLLINK_CMD_HW_JTAGRAWCMD;
+               vsllink_usb_out_buffer[1] = ((byte_length * 2 + 3) >> 0) & 0xff;                // package size
+               vsllink_usb_out_buffer[2] = ((byte_length * 2 + 3) >> 8) & 0xff;
+               
+               memcpy(&vsllink_usb_out_buffer[3], tdi_buffer, byte_length);
+               memcpy(&vsllink_usb_out_buffer[3 + byte_length], tms_buffer, byte_length);
+               
+               result = vsllink_usb_message(vsllink_jtag_handle, 3 + 2 * byte_length, byte_length);
+               if (result == byte_length)
+               {
+                       for (i = 0; i < pending_scan_results_length; i++)
+                       {
+                               pending_scan_result_t *pending_scan_result = &pending_scan_results_buffer[i];
+                               u8 *buffer = pending_scan_result->buffer;
+                               int length = pending_scan_result->length;
+                               int first = pending_scan_result->offset;
+                               
+                               scan_command_t *command = pending_scan_result->command;
+                               buf_set_buf(vsllink_usb_in_buffer, first, buffer, 0, length);
+                               
+                               DEBUG_JTAG_IO("JTAG scan read(%d bits, from %d bits):", length, first);
+#ifdef _DEBUG_JTAG_IO_
+                               vsllink_debug_buffer(buffer, (length + 7) >> 3);
+#endif
+                               
+                               if (jtag_read_buffer(buffer, command) != ERROR_OK)
+                               {
+                                       vsllink_tap_init();
+                                       return ERROR_JTAG_QUEUE_FAILED;
+                               }
+                               
+                               if (pending_scan_result->buffer != NULL)
+                               {
+                                       free(pending_scan_result->buffer);
+                               }
+                       }
+               }
+               else
+               {
+                       LOG_ERROR("vsllink_tap_execute, wrong result %d, expected %d", result, byte_length);
+                       return ERROR_JTAG_QUEUE_FAILED;
+               }
+               
+               vsllink_tap_init();
+       }
+       
        return ERROR_OK;
 }
 
 /*****************************************************************************/
 /* VSLLink USB low-level functions */
 
-vsllink_jtag_t* vsllink_usb_open(void)
+static vsllink_jtag_t* vsllink_usb_open(void)
 {
        struct usb_bus *busses;
        struct usb_bus *bus;
        struct usb_device *dev;
-
+       int ret;
+       
        vsllink_jtag_t *result;
-
+       
        result = (vsllink_jtag_t*) malloc(sizeof(vsllink_jtag_t));
-
+       
        usb_init();
        usb_find_busses();
        usb_find_devices();
-
+       
        busses = usb_get_busses();
-
+       
        /* find vsllink_jtag device in usb bus */
-
+       
        for (bus = busses; bus; bus = bus->next)
        {
                for (dev = bus->devices; dev; dev = dev->next)
                {
-                       if ((dev->descriptor.idVendor == vsllink_vid) && (dev->descriptor.idProduct == vsllink_pid))
+                       if ((dev->descriptor.idVendor == vsllink_usb_vid) && (dev->descriptor.idProduct == vsllink_usb_pid))
                        {
                                result->usb_handle = usb_open(dev);
-
+                               if (NULL == result->usb_handle)
+                               {
+                                       LOG_ERROR("failed to open %04X:%04X, not enough permissions?", vsllink_usb_vid, vsllink_usb_pid);
+                                       exit(-1);
+                               }
+                               
                                /* usb_set_configuration required under win32 */
-                               usb_set_configuration(result->usb_handle, dev->config[0].bConfigurationValue);
-                               usb_claim_interface(result->usb_handle, 0);
-
+                               ret = usb_set_configuration(result->usb_handle, dev->config[0].bConfigurationValue);
+                               if (ret != 0)
+                               {
+                                       LOG_ERROR("fail to set configuration to %d, %d returned, not enough permissions?", dev->config[0].bConfigurationValue, ret);
+                                       exit(-1);
+                               }
+                               ret = usb_claim_interface(result->usb_handle, vsllink_usb_interface);
+                               if (ret != 0)
+                               {
+                                       LOG_ERROR("fail to claim interface %d, %d returned", vsllink_usb_interface, ret);
+                                       exit(-1);
+                               }
+                               
 #if 0
-                               /*
+                               /* 
                                 * This makes problems under Mac OS X. And is not needed
                                 * under Windows. Hopefully this will not break a linux build
                                 */
                                usb_set_altinterface(result->usb_handle, 0);
-#endif
+#endif                         
                                return result;
                        }
                }
        }
-
+       
        free(result);
        return NULL;
 }
 
 static void vsllink_usb_close(vsllink_jtag_t *vsllink_jtag)
 {
-       usb_close(vsllink_jtag->usb_handle);
+       int ret;
+
+       ret = usb_release_interface(vsllink_jtag->usb_handle, vsllink_usb_interface);
+       if (ret != 0)
+       {
+               LOG_ERROR("fail to release interface %d, %d returned", vsllink_usb_interface, ret);
+               exit(-1);
+       }
+
+       ret = usb_close(vsllink_jtag->usb_handle);
+       if (ret != 0)
+       {
+               LOG_ERROR("fail to close usb, %d returned", ret);
+               exit(-1);
+       }
+
        free(vsllink_jtag);
 }
 
@@ -1362,7 +1858,7 @@ static void vsllink_usb_close(vsllink_jtag_t *vsllink_jtag)
 static int vsllink_usb_message(vsllink_jtag_t *vsllink_jtag, int out_length, int in_length)
 {
        int result;
-
+       
        result = vsllink_usb_write(vsllink_jtag, out_length);
        if (result == out_length)
        {
@@ -1392,18 +1888,18 @@ static int vsllink_usb_message(vsllink_jtag_t *vsllink_jtag, int out_length, int
 static int vsllink_usb_write(vsllink_jtag_t *vsllink_jtag, int out_length)
 {
        int result;
-
+       
        if (out_length > VSLLINK_BufferSize)
        {
                LOG_ERROR("vsllink_jtag_write illegal out_length=%d (max=%d)", out_length, VSLLINK_BufferSize);
                return -1;
        }
-
-       result = usb_bulk_write(vsllink_jtag->usb_handle, vsllink_bulkout, \
+       
+       result = usb_bulk_write(vsllink_jtag->usb_handle, vsllink_usb_bulkout, \
                (char *)vsllink_usb_out_buffer, out_length, VSLLINK_USB_TIMEOUT);
-
+       
        DEBUG_JTAG_IO("vsllink_usb_write, out_length = %d, result = %d", out_length, result);
-
+       
 #ifdef _DEBUG_USB_COMMS_
        LOG_DEBUG("USB out:");
        vsllink_debug_buffer(vsllink_usb_out_buffer, out_length);
@@ -1419,11 +1915,11 @@ static int vsllink_usb_write(vsllink_jtag_t *vsllink_jtag, int out_length)
 /* Read data from USB into in_buffer. */
 static int vsllink_usb_read(vsllink_jtag_t *vsllink_jtag)
 {
-       int result = usb_bulk_read(vsllink_jtag->usb_handle, vsllink_bulkin, \
+       int result = usb_bulk_read(vsllink_jtag->usb_handle, vsllink_usb_bulkin, \
                (char *)vsllink_usb_in_buffer, VSLLINK_BufferSize, VSLLINK_USB_TIMEOUT);
-
+               
        DEBUG_JTAG_IO("vsllink_usb_read, result = %d", result);
-
+       
 #ifdef _DEBUG_USB_COMMS_
        LOG_DEBUG("USB in:");
        vsllink_debug_buffer(vsllink_usb_in_buffer, result);
@@ -1440,7 +1936,7 @@ static void vsllink_debug_buffer(u8 *buffer, int length)
        char s[4];
        int i;
        int j;
-
+       
        for (i = 0; i < length; i += BYTES_PER_LINE)
        {
                snprintf(line, 5, "%04x", i);
diff --git a/src/target/interface/vsllink.cfg b/src/target/interface/vsllink.cfg
new file mode 100644 (file)
index 0000000..7c9de7f
--- /dev/null
@@ -0,0 +1,25 @@
+#
+# Versaloon Link -- VSLLink
+#
+# http://www.simonqian.com/en/Versaloon
+#
+
+interface vsllink
+
+#vsllink_usb_vid               0x03EB
+#vsllink_usb_pid               0x2103
+#vsllink_usb_bulkin    0x02
+#vsllink_usb_bulkout   0x02
+#vsllink_usb_interface 0
+
+vsllink_usb_vid                0x0483
+vsllink_usb_pid                0x5740
+vsllink_usb_bulkin     0x02
+vsllink_usb_bulkout    0x03
+vsllink_usb_interface  1
+
+# vsllink mode, dma or normal
+# for low jtag_khz, use normal
+# for high jtag_khz, use dma
+#vsllink_mode dma
+vsllink_mode normal