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- /***************************************************************************
- * Copyright (C) 2007 by Juergen Stuber <juergen@jstuber.net> *
- * based on Dominic Rath's and Benedikt Sauter's usbprog.c *
- * *
- * Copyright (C) 2008 by Spencer Oliver *
- * spen@spen-soft.co.uk *
- * *
- * Copyright (C) 2011 by Jean-Christophe PLAGNIOL-VIILARD *
- * plagnioj@jcrosoft.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 <jtag/interface.h>
- #include <jtag/commands.h>
- #include "libusb_common.h"
-
- /* See Segger's public documentation:
- * Reference manual for J-Link USB Protocol
- * Document RM08001-R6 Date: June 16, 2009
- * (Or newer, with some SWD information).
- * http://www.segger.com/cms/admin/uploads/productDocs/RM08001_JLinkUSBProtocol.pdf
- */
-
- /*
- * The default pid of the segger is 0x0101
- * But when you change the USB Address it will also
- *
- * pid = ( usb_address > 0x4) ? 0x0101 : (0x101 + usb_address)
- */
-
- #define VID 0x1366, 0x1366, 0x1366, 0x1366
- #define PID 0x0101, 0x0102, 0x0103, 0x0104
-
- #define JLINK_WRITE_ENDPOINT 0x02
- #define JLINK_READ_ENDPOINT 0x81
-
- static unsigned int jlink_write_ep = JLINK_WRITE_ENDPOINT;
- static unsigned int jlink_read_ep = JLINK_READ_ENDPOINT;
- static unsigned int jlink_hw_jtag_version = 2;
-
- #define JLINK_USB_TIMEOUT 1000
-
- /* See Section 3.3.2 of the Segger JLink USB protocol manual */
- /* 2048 is the max value we can use here */
- #define JLINK_TAP_BUFFER_SIZE 2048
- /*#define JLINK_TAP_BUFFER_SIZE 256*/
- /*#define JLINK_TAP_BUFFER_SIZE 384*/
-
- #define JLINK_IN_BUFFER_SIZE 2048
- #define JLINK_OUT_BUFFER_SIZE (2*2048 + 4)
- #define JLINK_EMU_RESULT_BUFFER_SIZE 64
-
- /* Global USB buffers */
- static uint8_t usb_in_buffer[JLINK_IN_BUFFER_SIZE];
- static uint8_t usb_out_buffer[JLINK_OUT_BUFFER_SIZE];
- static uint8_t usb_emu_result_buffer[JLINK_EMU_RESULT_BUFFER_SIZE];
-
- /* Constants for JLink command */
- #define EMU_CMD_VERSION 0x01
- #define EMU_CMD_SET_SPEED 0x05
- #define EMU_CMD_GET_STATE 0x07
- #define EMU_CMD_HW_CLOCK 0xc8
- #define EMU_CMD_HW_TMS0 0xc9
- #define EMU_CMD_HW_TMS1 0xca
- #define EMU_CMD_HW_JTAG2 0xce
- #define EMU_CMD_HW_JTAG3 0xcf
- #define EMU_CMD_GET_MAX_MEM_BLOCK 0xd4
- #define EMU_CMD_HW_RESET0 0xdc
- #define EMU_CMD_HW_RESET1 0xdd
- #define EMU_CMD_HW_TRST0 0xde
- #define EMU_CMD_HW_TRST1 0xdf
- #define EMU_CMD_GET_CAPS 0xe8
- #define EMU_CMD_GET_HW_VERSION 0xf0
- #define EMU_CMD_READ_CONFIG 0xf2
- #define EMU_CMD_WRITE_CONFIG 0xf3
-
- /* bits return from EMU_CMD_GET_CAPS */
- #define EMU_CAP_RESERVED_1 0
- #define EMU_CAP_GET_HW_VERSION 1
- #define EMU_CAP_WRITE_DCC 2
- #define EMU_CAP_ADAPTIVE_CLOCKING 3
- #define EMU_CAP_READ_CONFIG 4
- #define EMU_CAP_WRITE_CONFIG 5
- #define EMU_CAP_TRACE 6
- #define EMU_CAP_WRITE_MEM 7
- #define EMU_CAP_READ_MEM 8
- #define EMU_CAP_SPEED_INFO 9
- #define EMU_CAP_EXEC_CODE 10
- #define EMU_CAP_GET_MAX_BLOCK_SIZE 11
- #define EMU_CAP_GET_HW_INFO 12
- #define EMU_CAP_SET_KS_POWER 13
- #define EMU_CAP_RESET_STOP_TIMED 14
- #define EMU_CAP_RESERVED_2 15
- #define EMU_CAP_MEASURE_RTCK_REACT 16
- #define EMU_CAP_SELECT_IF 17
- #define EMU_CAP_RW_MEM_ARM79 18
- #define EMU_CAP_GET_COUNTERS 19
- #define EMU_CAP_READ_DCC 20
- #define EMU_CAP_GET_CPU_CAPS 21
- #define EMU_CAP_EXEC_CPU_CMD 22
- #define EMU_CAP_SWO 23
- #define EMU_CAP_WRITE_DCC_EX 24
- #define EMU_CAP_UPDATE_FIRMWARE_EX 25
- #define EMU_CAP_FILE_IO 26
- #define EMU_CAP_REGISTER 27
- #define EMU_CAP_INDICATORS 28
- #define EMU_CAP_TEST_NET_SPEED 29
- #define EMU_CAP_RAWTRACE 30
- #define EMU_CAP_RESERVED_3 31
-
- static char *jlink_cap_str[] = {
- "Always 1.",
- "Supports command EMU_CMD_GET_HARDWARE_VERSION",
- "Supports command EMU_CMD_WRITE_DCC",
- "Supports adaptive clocking",
- "Supports command EMU_CMD_READ_CONFIG",
- "Supports command EMU_CMD_WRITE_CONFIG",
- "Supports trace commands",
- "Supports command EMU_CMD_WRITE_MEM",
- "Supports command EMU_CMD_READ_MEM",
- "Supports command EMU_CMD_GET_SPEED",
- "Supports command EMU_CMD_CODE_...",
- "Supports command EMU_CMD_GET_MAX_BLOCK_SIZE",
- "Supports command EMU_CMD_GET_HW_INFO",
- "Supports command EMU_CMD_SET_KS_POWER",
- "Supports command EMU_CMD_HW_RELEASE_RESET_STOP_TIMED",
- "Reserved",
- "Supports command EMU_CMD_MEASURE_RTCK_REACT",
- "Supports command EMU_CMD_HW_SELECT_IF",
- "Supports command EMU_CMD_READ/WRITE_MEM_ARM79",
- "Supports command EMU_CMD_GET_COUNTERS",
- "Supports command EMU_CMD_READ_DCC",
- "Supports command EMU_CMD_GET_CPU_CAPS",
- "Supports command EMU_CMD_EXEC_CPU_CMD",
- "Supports command EMU_CMD_SWO",
- "Supports command EMU_CMD_WRITE_DCC_EX",
- "Supports command EMU_CMD_UPDATE_FIRMWARE_EX",
- "Supports command EMU_CMD_FILE_IO",
- "Supports command EMU_CMD_REGISTER",
- "Supports command EMU_CMD_INDICATORS",
- "Supports command EMU_CMD_TEST_NET_SPEED",
- "Supports command EMU_CMD_RAWTRACE",
- "Reserved",
- };
-
- /* max speed 12MHz v5.0 jlink */
- #define JLINK_MAX_SPEED 12000
-
- /* J-Link hardware versions */
- #define JLINK_HW_TYPE_JLINK 0
- #define JLINK_HW_TYPE_JTRACE 1
- #define JLINK_HW_TYPE_FLASHER 2
- #define JLINK_HW_TYPE_JLINK_PRO 3
- #define JLINK_HW_TYPE_MAX 4
-
- static char *jlink_hw_type_str[] = {
- "J-Link",
- "J-Trace",
- "Flasher",
- "J-Link Pro",
- };
-
- /* Queue command functions */
- static void jlink_end_state(tap_state_t state);
- static void jlink_state_move(void);
- static void jlink_path_move(int num_states, tap_state_t *path);
- static void jlink_runtest(int num_cycles);
- static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
- int scan_size, struct scan_command *command);
- static void jlink_reset(int trst, int srst);
- static void jlink_simple_command(uint8_t command);
- static int jlink_get_status(void);
-
- /* J-Link tap buffer functions */
- static void jlink_tap_init(void);
- static int jlink_tap_execute(void);
- static void jlink_tap_ensure_space(int scans, int bits);
- static void jlink_tap_append_step(int tms, int tdi);
- static void jlink_tap_append_scan(int length, uint8_t *buffer,
- struct scan_command *command);
-
- /* Jlink lowlevel functions */
- struct jlink {
- struct jtag_libusb_device_handle *usb_handle;
- };
-
- static struct jlink *jlink_usb_open(void);
- static void jlink_usb_close(struct jlink *jlink);
- static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length);
- static int jlink_usb_write(struct jlink *jlink, int out_length);
- static int jlink_usb_read(struct jlink *jlink, int expected_size);
- static int jlink_usb_read_emu_result(struct jlink *jlink);
-
- /* helper functions */
- static int jlink_get_version_info(void);
-
- #ifdef _DEBUG_USB_COMMS_
- static void jlink_debug_buffer(uint8_t *buffer, int length);
- #else
- static inline void jlink_debug_buffer(uint8_t *buffer, int length)
- {
- }
- #endif
-
- static enum tap_state jlink_last_state = TAP_RESET;
-
- static struct jlink *jlink_handle;
-
- /* pid could be specified at runtime */
- static uint16_t vids[] = { VID, 0 };
- static uint16_t pids[] = { PID, 0 };
-
- static uint32_t jlink_caps;
- static uint32_t jlink_hw_type;
-
- /* 256 byte non-volatile memory */
- struct jlink_config {
- uint8_t usb_address;
- /* 0ffset 0x01 to 0x03 */
- uint8_t reserved_1[3];
- uint32_t kickstart_power_on_jtag_pin_19;
- /* 0ffset 0x08 to 0x1f */
- uint8_t reserved_2[24];
- /* IP only for J-Link Pro */
- uint8_t ip_address[4];
- uint8_t subnet_mask[4];
- /* 0ffset 0x28 to 0x2f */
- uint8_t reserved_3[8];
- uint8_t mac_address[6];
- /* 0ffset 0x36 to 0xff */
- uint8_t reserved_4[202];
- } __attribute__ ((packed));
- struct jlink_config jlink_cfg;
-
- /***************************************************************************/
- /* External interface implementation */
-
- static void jlink_execute_runtest(struct jtag_command *cmd)
- {
- DEBUG_JTAG_IO("runtest %i cycles, end in %i",
- cmd->cmd.runtest->num_cycles,
- cmd->cmd.runtest->end_state);
-
- jlink_end_state(cmd->cmd.runtest->end_state);
-
- jlink_runtest(cmd->cmd.runtest->num_cycles);
- }
-
- static void jlink_execute_statemove(struct jtag_command *cmd)
- {
- DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
-
- jlink_end_state(cmd->cmd.statemove->end_state);
- jlink_state_move();
- }
-
- static void jlink_execute_pathmove(struct jtag_command *cmd)
- {
- DEBUG_JTAG_IO("pathmove: %i states, end in %i",
- cmd->cmd.pathmove->num_states,
- cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
-
- jlink_path_move(cmd->cmd.pathmove->num_states,
- cmd->cmd.pathmove->path);
- }
-
- static void jlink_execute_scan(struct jtag_command *cmd)
- {
- int scan_size;
- enum scan_type type;
- uint8_t *buffer;
-
- DEBUG_JTAG_IO("scan end in %s", tap_state_name(cmd->cmd.scan->end_state));
-
- jlink_end_state(cmd->cmd.scan->end_state);
-
- scan_size = jtag_build_buffer(cmd->cmd.scan, &buffer);
- DEBUG_JTAG_IO("scan input, length = %d", scan_size);
-
- jlink_debug_buffer(buffer, (scan_size + 7) / 8);
- type = jtag_scan_type(cmd->cmd.scan);
- jlink_scan(cmd->cmd.scan->ir_scan,
- type, buffer, scan_size, cmd->cmd.scan);
- }
-
- static void jlink_execute_reset(struct jtag_command *cmd)
- {
- DEBUG_JTAG_IO("reset trst: %i srst %i",
- cmd->cmd.reset->trst, cmd->cmd.reset->srst);
-
- jlink_tap_execute();
- jlink_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
- jlink_tap_execute();
- }
-
- static void jlink_execute_sleep(struct jtag_command *cmd)
- {
- DEBUG_JTAG_IO("sleep %" PRIi32 "", cmd->cmd.sleep->us);
- jlink_tap_execute();
- jtag_sleep(cmd->cmd.sleep->us);
- }
-
- static void jlink_execute_command(struct jtag_command *cmd)
- {
- switch (cmd->type) {
- case JTAG_RUNTEST:
- jlink_execute_runtest(cmd);
- break;
- case JTAG_TLR_RESET:
- jlink_execute_statemove(cmd);
- break;
- case JTAG_PATHMOVE:
- jlink_execute_pathmove(cmd);
- break;
- case JTAG_SCAN:
- jlink_execute_scan(cmd);
- break;
- case JTAG_RESET:
- jlink_execute_reset(cmd);
- break;
- case JTAG_SLEEP:
- jlink_execute_sleep(cmd);
- break;
- default:
- LOG_ERROR("BUG: unknown JTAG command type encountered");
- exit(-1);
- }
- }
-
- static int jlink_execute_queue(void)
- {
- struct jtag_command *cmd = jtag_command_queue;
-
- while (cmd != NULL) {
- jlink_execute_command(cmd);
- cmd = cmd->next;
- }
-
- return jlink_tap_execute();
- }
-
- /* Sets speed in kHz. */
- static int jlink_speed(int speed)
- {
- int result;
-
- if (speed > JLINK_MAX_SPEED) {
- LOG_INFO("reduce speed request: %dkHz to %dkHz maximum",
- speed, JLINK_MAX_SPEED);
- speed = JLINK_MAX_SPEED;
- }
-
- /* check for RTCK setting */
- if (speed == 0)
- speed = -1;
-
- usb_out_buffer[0] = EMU_CMD_SET_SPEED;
- usb_out_buffer[1] = (speed >> 0) & 0xff;
- usb_out_buffer[2] = (speed >> 8) & 0xff;
-
- result = jlink_usb_write(jlink_handle, 3);
- if (result != 3) {
- LOG_ERROR("J-Link setting speed failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- return ERROR_OK;
- }
-
- static int jlink_speed_div(int speed, int *khz)
- {
- *khz = speed;
-
- return ERROR_OK;
- }
-
- static int jlink_khz(int khz, int *jtag_speed)
- {
- *jtag_speed = khz;
-
- return ERROR_OK;
- }
-
- static int jlink_init(void)
- {
- int i;
-
- jlink_handle = jlink_usb_open();
-
- if (jlink_handle == 0) {
- LOG_ERROR("Cannot find jlink Interface! Please check "
- "connection and permissions.");
- return ERROR_JTAG_INIT_FAILED;
- }
-
- /*
- * The next three instructions were added after discovering a problem
- * while using an oscilloscope.
- * For the V8 SAM-ICE dongle (and likely other j-link device variants),
- * the reset line to the target microprocessor was found to cycle only
- * intermittently during emulator startup (even after encountering the
- * downstream reset instruction later in the code).
- * This was found to create two issues:
- * 1) In general it is a bad practice to not reset a CPU to a known
- * state when starting an emulator and
- * 2) something critical happens inside the dongle when it does the
- * first read following a new USB session.
- * Keeping the processor in reset during the first read collecting
- * version information seems to prevent errant
- * "J-Link command EMU_CMD_VERSION failed" issues.
- */
-
- LOG_INFO("J-Link initialization started / target CPU reset initiated");
- jlink_simple_command(EMU_CMD_HW_TRST0);
- jlink_simple_command(EMU_CMD_HW_RESET0);
- usleep(1000);
-
- jlink_hw_jtag_version = 2;
-
- if (jlink_get_version_info() == ERROR_OK) {
- /* attempt to get status */
- jlink_get_status();
- }
-
- LOG_INFO("J-Link JTAG Interface ready");
-
- jlink_reset(0, 0);
- jtag_sleep(3000);
- jlink_tap_init();
-
- /* v5/6 jlink seems to have an issue if the first tap move
- * is not divisible by 8, so we send a TLR on first power up */
- for (i = 0; i < 8; i++)
- jlink_tap_append_step(1, 0);
- jlink_tap_execute();
-
- return ERROR_OK;
- }
-
- static int jlink_quit(void)
- {
- jlink_usb_close(jlink_handle);
- return ERROR_OK;
- }
-
- /***************************************************************************/
- /* Queue command implementations */
-
- static void jlink_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);
- }
- }
-
- /* Goes to the end state. */
- static void jlink_state_move(void)
- {
- int i;
- int tms = 0;
- uint8_t tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
- uint8_t tms_scan_bits = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
-
- for (i = 0; i < tms_scan_bits; i++) {
- tms = (tms_scan >> i) & 1;
- jlink_tap_append_step(tms, 0);
- }
-
- tap_set_state(tap_get_end_state());
- }
-
- static void jlink_path_move(int num_states, tap_state_t *path)
- {
- int i;
-
- for (i = 0; i < num_states; i++) {
- if (path[i] == tap_state_transition(tap_get_state(), false))
- jlink_tap_append_step(0, 0);
- else if (path[i] == tap_state_transition(tap_get_state(), true))
- jlink_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]);
- }
-
- tap_set_end_state(tap_get_state());
- }
-
- static void jlink_runtest(int num_cycles)
- {
- int i;
-
- tap_state_t saved_end_state = tap_get_end_state();
-
- jlink_tap_ensure_space(1, num_cycles + 16);
-
- /* only do a state_move when we're not already in IDLE */
- if (tap_get_state() != TAP_IDLE) {
- jlink_end_state(TAP_IDLE);
- jlink_state_move();
- /* num_cycles--; */
- }
-
- /* execute num_cycles */
- for (i = 0; i < num_cycles; i++)
- jlink_tap_append_step(0, 0);
-
- /* finish in end_state */
- jlink_end_state(saved_end_state);
- if (tap_get_state() != tap_get_end_state())
- jlink_state_move();
- }
-
- static void jlink_scan(bool ir_scan, enum scan_type type, uint8_t *buffer,
- int scan_size, struct scan_command *command)
- {
- tap_state_t saved_end_state;
-
- jlink_tap_ensure_space(1, scan_size + 16);
-
- saved_end_state = tap_get_end_state();
-
- /* Move to appropriate scan state */
- jlink_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
-
- /* Only move if we're not already there */
- if (tap_get_state() != tap_get_end_state())
- jlink_state_move();
-
- jlink_end_state(saved_end_state);
-
- /* Scan */
- jlink_tap_append_scan(scan_size, buffer, command);
-
- /* We are in Exit1, go to Pause */
- jlink_tap_append_step(0, 0);
-
- tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
-
- if (tap_get_state() != tap_get_end_state())
- jlink_state_move();
- }
-
- static void jlink_reset(int trst, int srst)
- {
- LOG_DEBUG("trst: %i, srst: %i", trst, srst);
-
- /* Signals are active low */
- if (srst == 0)
- jlink_simple_command(EMU_CMD_HW_RESET1);
-
- if (srst == 1)
- jlink_simple_command(EMU_CMD_HW_RESET0);
-
- if (trst == 1)
- jlink_simple_command(EMU_CMD_HW_TRST0);
-
- if (trst == 0)
- jlink_simple_command(EMU_CMD_HW_TRST1);
- }
-
- static void jlink_simple_command(uint8_t command)
- {
- int result;
-
- DEBUG_JTAG_IO("0x%02x", command);
-
- usb_out_buffer[0] = command;
- result = jlink_usb_write(jlink_handle, 1);
-
- if (result != 1)
- LOG_ERROR("J-Link command 0x%02x failed (%d)", command, result);
- }
-
- static int jlink_get_status(void)
- {
- int result;
-
- jlink_simple_command(EMU_CMD_GET_STATE);
-
- result = jlink_usb_read(jlink_handle, 8);
- if (result != 8) {
- LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- int vref = usb_in_buffer[0] + (usb_in_buffer[1] << 8);
- LOG_INFO("Vref = %d.%d TCK = %d TDI = %d TDO = %d TMS = %d SRST = %d TRST = %d", \
- vref / 1000, vref % 1000, \
- usb_in_buffer[2], usb_in_buffer[3], usb_in_buffer[4], \
- usb_in_buffer[5], usb_in_buffer[6], usb_in_buffer[7]);
-
- if (vref < 1500)
- LOG_ERROR("Vref too low. Check Target Power");
-
- return ERROR_OK;
- }
-
- #define jlink_dump_printf(context, expr ...) \
- do { \
- if (context) \
- command_print(context, expr); \
- else \
- LOG_INFO(expr); \
- } while (0);
-
- static void jlink_caps_dump(struct command_context *ctx)
- {
- int i;
-
- jlink_dump_printf(ctx, "J-Link Capabilities");
-
- for (i = 1; i < 31; i++)
- if (jlink_caps & (1 << i))
- jlink_dump_printf(ctx, "%s", jlink_cap_str[i]);
- }
-
- static void jlink_config_usb_address_dump(struct command_context *ctx, struct jlink_config *cfg)
- {
- if (!cfg)
- return;
-
- jlink_dump_printf(ctx, "USB-Address: 0x%x", cfg->usb_address);
- }
-
- static void jlink_config_kickstart_dump(struct command_context *ctx, struct jlink_config *cfg)
- {
- if (!cfg)
- return;
-
- jlink_dump_printf(ctx, "Kickstart power on JTAG-pin 19: 0x%x",
- cfg->kickstart_power_on_jtag_pin_19);
- }
-
- static void jlink_config_mac_address_dump(struct command_context *ctx, struct jlink_config *cfg)
- {
- if (!cfg)
- return;
-
- jlink_dump_printf(ctx, "MAC Address: %.02x:%.02x:%.02x:%.02x:%.02x:%.02x",
- cfg->mac_address[5], cfg->mac_address[4],
- cfg->mac_address[3], cfg->mac_address[2],
- cfg->mac_address[1], cfg->mac_address[0]);
- }
-
- static void jlink_config_ip_dump(struct command_context *ctx, struct jlink_config *cfg)
- {
- if (!cfg)
- return;
-
- jlink_dump_printf(ctx, "IP Address: %d.%d.%d.%d",
- cfg->ip_address[3], cfg->ip_address[2],
- cfg->ip_address[1], cfg->ip_address[0]);
- jlink_dump_printf(ctx, "Subnet Mask: %d.%d.%d.%d",
- cfg->subnet_mask[3], cfg->subnet_mask[2],
- cfg->subnet_mask[1], cfg->subnet_mask[0]);
- }
-
- static void jlink_config_dump(struct command_context *ctx, struct jlink_config *cfg)
- {
- if (!cfg)
- return;
-
- jlink_dump_printf(ctx, "J-Link configuration");
- jlink_config_usb_address_dump(ctx, cfg);
- jlink_config_kickstart_dump(ctx, cfg);
-
- if (jlink_hw_type == JLINK_HW_TYPE_JLINK_PRO) {
- jlink_config_ip_dump(ctx, cfg);
- jlink_config_mac_address_dump(ctx, cfg);
- }
- }
-
- static int jlink_get_config(struct jlink_config *cfg)
- {
- int result;
- int size = sizeof(struct jlink_config);
-
- jlink_simple_command(EMU_CMD_READ_CONFIG);
-
- result = jlink_usb_read(jlink_handle, size);
- if (size != result) {
- LOG_ERROR("jlink_usb_read failed (requested=%d, result=%d)", size, result);
- return ERROR_FAIL;
- }
-
- memcpy(cfg, usb_in_buffer, size);
-
- /*
- * Section 4.2.4 IN-transaction
- * read dummy 0-byte packet
- */
- jlink_usb_read(jlink_handle, 1);
-
- return ERROR_OK;
- }
-
- static int jlink_set_config(struct jlink_config *cfg)
- {
- int result;
- int size = sizeof(struct jlink_config);
-
- jlink_simple_command(EMU_CMD_WRITE_CONFIG);
-
- memcpy(usb_out_buffer, cfg, size);
-
- result = jlink_usb_write(jlink_handle, size);
- if (result != size) {
- LOG_ERROR("jlink_usb_write failed (requested=%d, result=%d)", 256, result);
- return ERROR_FAIL;
- }
-
- return ERROR_OK;
- }
-
- static int jlink_get_version_info(void)
- {
- int result;
- int len;
- uint32_t jlink_max_size;
-
- /* query hardware version */
- jlink_simple_command(EMU_CMD_VERSION);
-
- result = jlink_usb_read(jlink_handle, 2);
- if (2 != result) {
- LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- len = buf_get_u32(usb_in_buffer, 0, 16);
- if (len > JLINK_IN_BUFFER_SIZE) {
- LOG_ERROR("J-Link command EMU_CMD_VERSION impossible return length 0x%0x", len);
- len = JLINK_IN_BUFFER_SIZE;
- }
-
- result = jlink_usb_read(jlink_handle, len);
- if (result != len) {
- LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- usb_in_buffer[result] = 0;
- LOG_INFO("%s", (char *)usb_in_buffer);
-
- /* query hardware capabilities */
- jlink_simple_command(EMU_CMD_GET_CAPS);
-
- result = jlink_usb_read(jlink_handle, 4);
- if (4 != result) {
- LOG_ERROR("J-Link command EMU_CMD_GET_CAPS failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- jlink_caps = buf_get_u32(usb_in_buffer, 0, 32);
- LOG_INFO("J-Link caps 0x%x", (unsigned)jlink_caps);
-
- if (jlink_caps & (1 << EMU_CAP_GET_HW_VERSION)) {
- /* query hardware version */
- jlink_simple_command(EMU_CMD_GET_HW_VERSION);
-
- result = jlink_usb_read(jlink_handle, 4);
- if (4 != result) {
- LOG_ERROR("J-Link command EMU_CMD_GET_HW_VERSION failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- uint32_t jlink_hw_version = buf_get_u32(usb_in_buffer, 0, 32);
- uint32_t major_revision = (jlink_hw_version / 10000) % 100;
- jlink_hw_type = (jlink_hw_version / 1000000) % 100;
- if (major_revision >= 5)
- jlink_hw_jtag_version = 3;
-
- LOG_INFO("J-Link hw version %i", (int)jlink_hw_version);
-
- if (jlink_hw_type >= JLINK_HW_TYPE_MAX)
- LOG_INFO("J-Link hw type uknown 0x%x", jlink_hw_type);
- else
- LOG_INFO("J-Link hw type %s", jlink_hw_type_str[jlink_hw_type]);
- }
-
- if (jlink_caps & (1 << EMU_CAP_GET_MAX_BLOCK_SIZE)) {
- /* query hardware maximum memory block */
- jlink_simple_command(EMU_CMD_GET_MAX_MEM_BLOCK);
-
- result = jlink_usb_read(jlink_handle, 4);
- if (4 != result) {
- LOG_ERROR("J-Link command EMU_CMD_GET_MAX_MEM_BLOCK failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- jlink_max_size = buf_get_u32(usb_in_buffer, 0, 32);
- LOG_INFO("J-Link max mem block %i", (int)jlink_max_size);
- }
-
- if (jlink_caps & (1 << EMU_CAP_READ_CONFIG)) {
- if (jlink_get_config(&jlink_cfg) != ERROR_OK)
- return ERROR_JTAG_DEVICE_ERROR;
-
- jlink_config_dump(NULL, &jlink_cfg);
- }
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_pid_command)
- {
- if (CMD_ARGC != 1) {
- LOG_ERROR("Need exactly one argument to jlink_pid");
- return ERROR_FAIL;
- }
-
- pids[0] = strtoul(CMD_ARGV[0], NULL, 16);
- pids[1] = 0;
- vids[1] = 0;
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_info_command)
- {
- if (jlink_get_version_info() == ERROR_OK) {
- /* attempt to get status */
- jlink_get_status();
- }
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_caps_command)
- {
- jlink_caps_dump(CMD_CTX);
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_hw_jtag_command)
- {
- switch (CMD_ARGC) {
- case 0:
- command_print(CMD_CTX, "J-Link hw jtag %i", jlink_hw_jtag_version);
- break;
- case 1: {
- int request_version = atoi(CMD_ARGV[0]);
- switch (request_version) {
- case 2:
- case 3:
- jlink_hw_jtag_version = request_version;
- break;
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
- break;
- }
- default:
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_kickstart_command)
- {
- uint32_t kickstart;
-
- if (CMD_ARGC < 1) {
- jlink_config_kickstart_dump(CMD_CTX, &jlink_cfg);
- return ERROR_OK;
- }
-
- COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], kickstart);
-
- jlink_cfg.kickstart_power_on_jtag_pin_19 = kickstart;
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_mac_address_command)
- {
- uint8_t addr[6];
- int i;
- char *e;
- const char *str;
-
- if (CMD_ARGC < 1) {
- jlink_config_mac_address_dump(CMD_CTX, &jlink_cfg);
- return ERROR_OK;
- }
-
- str = CMD_ARGV[0];
-
- if ((strlen(str) != 17) || (str[2] != ':' || str[5] != ':' || str[8] != ':' ||
- str[11] != ':' || str[14] != ':')) {
- command_print(CMD_CTX, "ethaddr miss format ff:ff:ff:ff:ff:ff");
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- for (i = 5; i >= 0; i--) {
- addr[i] = strtoul(str, &e, 16);
- str = e + 1;
- }
-
- if (!(addr[0] | addr[1] | addr[2] | addr[3] | addr[4] | addr[5])) {
- command_print(CMD_CTX, "invalid it's zero mac_address");
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- if (!(0x01 & addr[0])) {
- command_print(CMD_CTX, "invalid it's a multicat mac_address");
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- memcpy(jlink_cfg.mac_address, addr, sizeof(addr));
-
- return ERROR_OK;
- }
-
- static int string_to_ip(const char *s, uint8_t *ip, int *pos)
- {
- uint8_t lip[4];
- char *e;
- const char *s_save = s;
- int i;
-
- if (!s)
- return -EINVAL;
-
- for (i = 0; i < 4; i++) {
- lip[i] = strtoul(s, &e, 10);
-
- if (*e != '.' && i != 3)
- return -EINVAL;
-
- s = e + 1;
- }
-
- *pos = e - s_save;
-
- memcpy(ip, lip, sizeof(lip));
- return ERROR_OK;
- }
-
- static void cpy_ip(uint8_t *dst, uint8_t *src)
- {
- int i, j;
-
- for (i = 0, j = 3; i < 4; i++, j--)
- dst[i] = src[j];
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_ip_command)
- {
- uint32_t ip_address;
- uint32_t subnet_mask = 0;
- int i, len;
- int ret;
- uint8_t subnet_bits = 24;
-
- if (CMD_ARGC < 1) {
- jlink_config_ip_dump(CMD_CTX, &jlink_cfg);
- return ERROR_OK;
- }
-
- ret = string_to_ip(CMD_ARGV[0], (uint8_t *)&ip_address, &i);
- if (ret != ERROR_OK)
- return ret;
-
- len = strlen(CMD_ARGV[0]);
-
- /* check for this format A.B.C.D/E */
-
- if (i < len) {
- if (CMD_ARGV[0][i] != '/')
- return ERROR_COMMAND_SYNTAX_ERROR;
-
- COMMAND_PARSE_NUMBER(u8, CMD_ARGV[0] + i + 1, subnet_bits);
- } else {
- if (CMD_ARGC > 1) {
- ret = string_to_ip(CMD_ARGV[1], (uint8_t *)&subnet_mask, &i);
- if (ret != ERROR_OK)
- return ret;
- }
- }
-
- if (!subnet_mask)
- subnet_mask = (uint32_t)(subnet_bits < 32 ?
- ((1ULL << subnet_bits) - 1) : 0xffffffff);
-
- cpy_ip(jlink_cfg.ip_address, (uint8_t *)&ip_address);
- cpy_ip(jlink_cfg.subnet_mask, (uint8_t *)&subnet_mask);
-
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_reset_command)
- {
- memset(&jlink_cfg, 0xff, sizeof(jlink_cfg));
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_save_command)
- {
- if (!(jlink_caps & (1 << EMU_CAP_WRITE_CONFIG))) {
- command_print(CMD_CTX, "J-Link write emulator configuration not supported");
- return ERROR_OK;
- }
-
- command_print(CMD_CTX, "The J-Link need to be unpluged and repluged ta have the config effective");
- return jlink_set_config(&jlink_cfg);
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_usb_address_command)
- {
- uint32_t address;
-
- if (CMD_ARGC < 1) {
- jlink_config_usb_address_dump(CMD_CTX, &jlink_cfg);
- return ERROR_OK;
- }
-
- COMMAND_PARSE_NUMBER(u32, CMD_ARGV[0], address);
-
- if (address > 0x3 && address != 0xff) {
- command_print(CMD_CTX, "USB Address must be between 0x00 and 0x03 or 0xff");
- return ERROR_COMMAND_SYNTAX_ERROR;
- }
-
- jlink_cfg.usb_address = address;
- return ERROR_OK;
- }
-
- COMMAND_HANDLER(jlink_handle_jlink_config_command)
- {
- struct jlink_config cfg;
- int ret = ERROR_OK;
-
- if (CMD_ARGC == 0) {
- if (!(jlink_caps & (1 << EMU_CAP_READ_CONFIG))) {
- command_print(CMD_CTX, "J-Link read emulator configuration not supported");
- goto exit;
- }
-
- ret = jlink_get_config(&cfg);
-
- if (ret != ERROR_OK)
- command_print(CMD_CTX, "J-Link read emulator configuration failled");
- else
- jlink_config_dump(CMD_CTX, &jlink_cfg);
- }
-
- exit:
- return ret;
- }
-
- static const struct command_registration jlink_config_subcommand_handlers[] = {
- {
- .name = "kickstart",
- .handler = &jlink_handle_jlink_kickstart_command,
- .mode = COMMAND_EXEC,
- .help = "set Kickstart power on JTAG-pin 19.",
- .usage = "[val]",
- },
- {
- .name = "mac_address",
- .handler = &jlink_handle_jlink_mac_address_command,
- .mode = COMMAND_EXEC,
- .help = "set the MAC Address",
- .usage = "[ff:ff:ff:ff:ff:ff]",
- },
- {
- .name = "ip",
- .handler = &jlink_handle_jlink_ip_command,
- .mode = COMMAND_EXEC,
- .help = "set the ip address of the J-Link Pro, "
- "where A.B.C.D is the ip, "
- "E the bit of the subnet mask, "
- "F.G.H.I the subnet mask",
- .usage = "[A.B.C.D[/E] [F.G.H.I]]",
- },
- {
- .name = "reset",
- .handler = &jlink_handle_jlink_reset_command,
- .mode = COMMAND_EXEC,
- .help = "reset the current config",
- },
- {
- .name = "save",
- .handler = &jlink_handle_jlink_save_command,
- .mode = COMMAND_EXEC,
- .help = "save the current config",
- },
- {
- .name = "usb_address",
- .handler = &jlink_handle_jlink_usb_address_command,
- .mode = COMMAND_EXEC,
- .help = "set the USB-Address, "
- "This will change the product id",
- .usage = "[0x00 to 0x03 or 0xff]",
- },
- COMMAND_REGISTRATION_DONE
- };
-
- static const struct command_registration jlink_subcommand_handlers[] = {
- {
- .name = "caps",
- .handler = &jlink_handle_jlink_caps_command,
- .mode = COMMAND_EXEC,
- .help = "show jlink capabilities",
- },
- {
- .name = "info",
- .handler = &jlink_handle_jlink_info_command,
- .mode = COMMAND_EXEC,
- .help = "show jlink info",
- },
- {
- .name = "hw_jtag",
- .handler = &jlink_handle_jlink_hw_jtag_command,
- .mode = COMMAND_EXEC,
- .help = "access J-Link HW JTAG command version",
- .usage = "[2|3]",
- },
- {
- .name = "config",
- .handler = &jlink_handle_jlink_config_command,
- .mode = COMMAND_EXEC,
- .help = "access J-Link configuration, "
- "if no argument this will dump the config",
- .chain = jlink_config_subcommand_handlers,
- },
- {
- .name = "pid",
- .handler = &jlink_pid_command,
- .mode = COMMAND_CONFIG,
- .help = "set the pid of the interface we want to use",
- },
- COMMAND_REGISTRATION_DONE
- };
-
- static const struct command_registration jlink_command_handlers[] = {
- {
- .name = "jlink",
- .mode = COMMAND_ANY,
- .help = "perform jlink management",
- .chain = jlink_subcommand_handlers,
- },
- COMMAND_REGISTRATION_DONE
- };
-
- struct jtag_interface jlink_interface = {
- .name = "jlink",
- .commands = jlink_command_handlers,
-
- .execute_queue = jlink_execute_queue,
- .speed = jlink_speed,
- .speed_div = jlink_speed_div,
- .khz = jlink_khz,
- .init = jlink_init,
- .quit = jlink_quit,
- };
-
- /***************************************************************************/
- /* J-Link tap functions */
-
-
- static unsigned tap_length;
- static uint8_t tms_buffer[JLINK_TAP_BUFFER_SIZE];
- static uint8_t tdi_buffer[JLINK_TAP_BUFFER_SIZE];
- static uint8_t tdo_buffer[JLINK_TAP_BUFFER_SIZE];
-
- struct pending_scan_result {
- int first; /* First bit position in tdo_buffer to read */
- int length; /* Number of bits to read */
- struct scan_command *command; /* Corresponding scan command */
- uint8_t *buffer;
- };
-
- #define MAX_PENDING_SCAN_RESULTS 256
-
- static int pending_scan_results_length;
- static struct pending_scan_result pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
-
- static void jlink_tap_init(void)
- {
- tap_length = 0;
- pending_scan_results_length = 0;
- }
-
- static void jlink_tap_ensure_space(int scans, int bits)
- {
- int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
- int available_bits = JLINK_TAP_BUFFER_SIZE * 8 - tap_length - 32;
-
- if (scans > available_scans || bits > available_bits)
- jlink_tap_execute();
- }
-
- static void jlink_tap_append_step(int tms, int tdi)
- {
- int index_var = tap_length / 8;
-
- if (index_var >= JLINK_TAP_BUFFER_SIZE) {
- LOG_ERROR("jlink_tap_append_step: overflow");
- *(uint32_t *)0xFFFFFFFF = 0;
- exit(-1);
- }
-
- int bit_index = tap_length % 8;
- uint8_t bit = 1 << bit_index;
-
- /* we do not pad TMS, so be sure to initialize all bits */
- if (0 == bit_index)
- tms_buffer[index_var] = tdi_buffer[index_var] = 0;
-
- if (tms)
- tms_buffer[index_var] |= bit;
- else
- tms_buffer[index_var] &= ~bit;
-
- if (tdi)
- tdi_buffer[index_var] |= bit;
- else
- tdi_buffer[index_var] &= ~bit;
-
- tap_length++;
- }
-
- static void jlink_tap_append_scan(int length, uint8_t *buffer,
- struct scan_command *command)
- {
- struct pending_scan_result *pending_scan_result =
- &pending_scan_results_buffer[pending_scan_results_length];
- int i;
-
- pending_scan_result->first = tap_length;
- pending_scan_result->length = length;
- pending_scan_result->command = command;
- pending_scan_result->buffer = buffer;
-
- for (i = 0; i < length; i++) {
- int tms = (i < (length - 1)) ? 0 : 1;
- int tdi = (buffer[i / 8] & (1 << (i % 8))) != 0;
- jlink_tap_append_step(tms, tdi);
- }
- 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 idle or pause state. */
- static int jlink_tap_execute(void)
- {
- int byte_length;
- int i;
- int result;
-
- if (!tap_length)
- return ERROR_OK;
-
- /* JLink returns an extra NULL in packet when size of incoming
- * message is a multiple of 64, creates problems with USB comms.
- * WARNING: This will interfere with tap state counting. */
- while ((DIV_ROUND_UP(tap_length, 8) % 64) == 0)
- jlink_tap_append_step((tap_get_state() == TAP_RESET) ? 1 : 0, 0);
-
- /* number of full bytes (plus one if some would be left over) */
- byte_length = DIV_ROUND_UP(tap_length, 8);
-
- bool use_jtag3 = jlink_hw_jtag_version >= 3;
- usb_out_buffer[0] = use_jtag3 ? EMU_CMD_HW_JTAG3 : EMU_CMD_HW_JTAG2;
- usb_out_buffer[1] = 0;
- usb_out_buffer[2] = (tap_length >> 0) & 0xff;
- usb_out_buffer[3] = (tap_length >> 8) & 0xff;
- memcpy(usb_out_buffer + 4, tms_buffer, byte_length);
- memcpy(usb_out_buffer + 4 + byte_length, tdi_buffer, byte_length);
-
- jlink_last_state = jtag_debug_state_machine(tms_buffer, tdi_buffer,
- tap_length, jlink_last_state);
-
- result = jlink_usb_message(jlink_handle, 4 + 2 * byte_length, byte_length);
- if (result != byte_length) {
- LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)",
- result, byte_length);
- jlink_tap_init();
- return ERROR_JTAG_QUEUE_FAILED;
- }
-
- memcpy(tdo_buffer, usb_in_buffer, byte_length);
-
- for (i = 0; i < pending_scan_results_length; i++) {
- struct pending_scan_result *pending_scan_result = &pending_scan_results_buffer[i];
- uint8_t *buffer = pending_scan_result->buffer;
- int length = pending_scan_result->length;
- int first = pending_scan_result->first;
- struct scan_command *command = pending_scan_result->command;
-
- /* Copy to buffer */
- buf_set_buf(tdo_buffer, first, buffer, 0, length);
-
- DEBUG_JTAG_IO("pending scan result, length = %d", length);
-
- jlink_debug_buffer(buffer, DIV_ROUND_UP(length, 8));
-
- if (jtag_read_buffer(buffer, command) != ERROR_OK) {
- jlink_tap_init();
- return ERROR_JTAG_QUEUE_FAILED;
- }
-
- if (pending_scan_result->buffer != NULL)
- free(pending_scan_result->buffer);
- }
-
- jlink_tap_init();
- return ERROR_OK;
- }
-
- /*****************************************************************************/
- /* JLink USB low-level functions */
-
- static struct jlink *jlink_usb_open()
- {
- struct jtag_libusb_device_handle *devh;
- if (jtag_libusb_open(vids, pids, &devh) != ERROR_OK)
- return NULL;
-
- /* BE ***VERY CAREFUL*** ABOUT MAKING CHANGES IN THIS
- * AREA!!!!!!!!!!! The behavior of libusb is not completely
- * consistent across Windows, Linux, and Mac OS X platforms.
- * The actions taken in the following compiler conditionals may
- * not agree with published documentation for libusb, but were
- * found to be necessary through trials and tribulations. Even
- * little tweaks can break one or more platforms, so if you do
- * make changes test them carefully on all platforms before
- * committing them!
- */
-
- #if IS_WIN32 == 0
-
- jtag_libusb_reset_device(devh);
-
- #if IS_DARWIN == 0
-
- int timeout = 5;
- /* reopen jlink after usb_reset
- * on win32 this may take a second or two to re-enumerate */
- int retval;
- while ((retval = jtag_libusb_open(vids, pids, &devh)) != ERROR_OK) {
- usleep(1000);
- timeout--;
- if (!timeout)
- break;
- }
- if (ERROR_OK != retval)
- return NULL;
- #endif
-
- #endif
-
- /* usb_set_configuration required under win32 */
- struct jtag_libusb_device *udev = jtag_libusb_get_device(devh);
- jtag_libusb_set_configuration(devh, 0);
- jtag_libusb_claim_interface(devh, 0);
-
- #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
-
- jtag_libusb_get_endpoints(udev, &jlink_read_ep, &jlink_write_ep);
-
- struct jlink *result = malloc(sizeof(struct jlink));
- result->usb_handle = devh;
- return result;
- }
-
- static void jlink_usb_close(struct jlink *jlink)
- {
- jtag_libusb_close(jlink->usb_handle);
- free(jlink);
- }
-
- /* Send a message and receive the reply. */
- static int jlink_usb_message(struct jlink *jlink, int out_length, int in_length)
- {
- int result;
-
- result = jlink_usb_write(jlink, out_length);
- if (result != out_length) {
- LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)",
- out_length, result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- result = jlink_usb_read(jlink, in_length);
- if ((result != in_length) && (result != (in_length + 1))) {
- LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)",
- in_length, result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- if (jlink_hw_jtag_version < 3)
- return result;
-
- int result2 = ERROR_OK;
- if (result == in_length) {
- /* Must read the result from the EMU too */
- result2 = jlink_usb_read_emu_result(jlink);
- if (1 != result2) {
- LOG_ERROR("jlink_usb_read_emu_result retried requested = 1, "
- "result=%d, in_length=%i", result2, in_length);
- /* Try again once, should only happen if (in_length%64 == 0) */
- result2 = jlink_usb_read_emu_result(jlink);
- if (1 != result2) {
- LOG_ERROR("jlink_usb_read_emu_result failed "
- "(requested = 1, result=%d)", result2);
- return ERROR_JTAG_DEVICE_ERROR;
- }
- }
-
- /* Check the result itself */
- result2 = usb_emu_result_buffer[0];
- } else {
- /* Save the result, then remove it from return value */
- result2 = usb_in_buffer[result--];
- }
-
- if (result2) {
- LOG_ERROR("jlink_usb_message failed with result=%d)", result2);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- return result;
- }
-
- /* calls the given usb_bulk_* function, allowing for the data to
- * trickle in with some timeouts */
- static int usb_bulk_with_retries(
- int (*f)(jtag_libusb_device_handle *, int, char *, int, int),
- jtag_libusb_device_handle *dev, int ep,
- char *bytes, int size, int timeout)
- {
- int tries = 3, count = 0;
-
- while (tries && (count < size)) {
- int result = f(dev, ep, bytes + count, size - count, timeout);
- if (result > 0)
- count += result;
- else if ((-ETIMEDOUT != result) || !--tries)
- return result;
- }
- return count;
- }
-
- static int wrap_usb_bulk_write(jtag_libusb_device_handle *dev, int ep,
- char *buff, int size, int timeout)
- {
- /* usb_bulk_write() takes const char *buff */
- return jtag_libusb_bulk_write(dev, ep, buff, size, timeout);
- }
-
- static inline int usb_bulk_write_ex(jtag_libusb_device_handle *dev, int ep,
- char *bytes, int size, int timeout)
- {
- return usb_bulk_with_retries(&wrap_usb_bulk_write,
- dev, ep, bytes, size, timeout);
- }
-
- static inline int usb_bulk_read_ex(jtag_libusb_device_handle *dev, int ep,
- char *bytes, int size, int timeout)
- {
- return usb_bulk_with_retries(&jtag_libusb_bulk_read,
- dev, ep, bytes, size, timeout);
- }
-
- /* Write data from out_buffer to USB. */
- static int jlink_usb_write(struct jlink *jlink, int out_length)
- {
- int result;
-
- if (out_length > JLINK_OUT_BUFFER_SIZE) {
- LOG_ERROR("jlink_write illegal out_length=%d (max=%d)",
- out_length, JLINK_OUT_BUFFER_SIZE);
- return -1;
- }
-
- result = usb_bulk_write_ex(jlink->usb_handle, jlink_write_ep,
- (char *)usb_out_buffer, out_length, JLINK_USB_TIMEOUT);
-
- DEBUG_JTAG_IO("jlink_usb_write, out_length = %d, result = %d",
- out_length, result);
-
- jlink_debug_buffer(usb_out_buffer, out_length);
- return result;
- }
-
- /* Read data from USB into in_buffer. */
- static int jlink_usb_read(struct jlink *jlink, int expected_size)
- {
- int result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
- (char *)usb_in_buffer, expected_size, JLINK_USB_TIMEOUT);
-
- DEBUG_JTAG_IO("jlink_usb_read, result = %d", result);
-
- jlink_debug_buffer(usb_in_buffer, result);
- return result;
- }
-
- /* Read the result from the previous EMU cmd into result_buffer. */
- static int jlink_usb_read_emu_result(struct jlink *jlink)
- {
- int result = usb_bulk_read_ex(jlink->usb_handle, jlink_read_ep,
- (char *)usb_emu_result_buffer, 1 /* JLINK_EMU_RESULT_BUFFER_SIZE */,
- JLINK_USB_TIMEOUT);
-
- DEBUG_JTAG_IO("jlink_usb_read_result, result = %d", result);
-
- jlink_debug_buffer(usb_emu_result_buffer, result);
- return result;
- }
-
- #ifdef _DEBUG_USB_COMMS_
- #define BYTES_PER_LINE 16
-
- static void jlink_debug_buffer(uint8_t *buffer, int length)
- {
- char line[81];
- char s[4];
- int i;
- int j;
-
- for (i = 0; i < length; i += BYTES_PER_LINE) {
- snprintf(line, 5, "%04x", i);
- for (j = i; j < i + BYTES_PER_LINE && j < length; j++) {
- snprintf(s, 4, " %02x", buffer[j]);
- strcat(line, s);
- }
- LOG_DEBUG("%s", line);
- }
- }
- #endif
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