|
- // vim:ts=4 sw=4:
-
- /***************************************************************************
- * Copyright (C) 2009 by Dimitar Dimitrov <dinuxbg@gmail.com> *
- * based on Dominic Rath's and Benedikt Sauter's usbprog.c *
- * *
- * 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
-
- #define INCLUDE_JTAG_INTERFACE_H
- #include "jtag.h"
- #include <usb.h>
-
-
- #define USB_VID 0x15ba
- #define USB_PID 0x001e
-
- #define ARMJTAGEW_EPT_BULK_OUT 0x01u
- #define ARMJTAGEW_EPT_BULK_IN 0x82u
-
- #define ARMJTAGEW_USB_TIMEOUT 2000
-
- #define ARMJTAGEW_IN_BUFFER_SIZE (4*1024)
- #define ARMJTAGEW_OUT_BUFFER_SIZE (4*1024)
-
-
- /* USB command request codes. */
- #define CMD_GET_VERSION 0x00
- #define CMD_SELECT_DPIMPL 0x10
- #define CMD_SET_TCK_FREQUENCY 0x11
- #define CMD_GET_TCK_FREQUENCY 0x12
- #define CMD_MEASURE_MAX_TCK_FREQ 0x15
- #define CMD_MEASURE_RTCK_RESPONSE 0x16
- #define CMD_TAP_SHIFT 0x17
- #define CMD_SET_TAPHW_STATE 0x20
- #define CMD_GET_TAPHW_STATE 0x21
- #define CMD_TGPWR_SETUP 0x22
-
- /* Global USB buffers */
- static u8 usb_in_buffer[ARMJTAGEW_IN_BUFFER_SIZE];
- static u8 usb_out_buffer[ARMJTAGEW_OUT_BUFFER_SIZE];
-
- /* External interface functions */
- static int armjtagew_execute_queue(void);
- static int armjtagew_speed(int speed);
- static int armjtagew_khz(int khz, int *jtag_speed);
- static int armjtagew_register_commands(struct command_context_s *cmd_ctx);
- static int armjtagew_init(void);
- static int armjtagew_quit(void);
-
- /* CLI command handler functions */
- static int armjtagew_handle_armjtagew_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc);
-
- /* Queue command functions */
- static void armjtagew_end_state(tap_state_t state);
- static void armjtagew_state_move(void);
- static void armjtagew_path_move(int num_states, tap_state_t *path);
- static void armjtagew_runtest(int num_cycles);
- static void armjtagew_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command);
- static void armjtagew_reset(int trst, int srst);
- //static void armjtagew_simple_command(u8 command);
- static int armjtagew_get_status(void);
-
- /* tap buffer functions */
- static void armjtagew_tap_init(void);
- static int armjtagew_tap_execute(void);
- static void armjtagew_tap_ensure_space(int scans, int bits);
- static void armjtagew_tap_append_step(int tms, int tdi);
- static void armjtagew_tap_append_scan(int length, u8 *buffer, scan_command_t *command);
-
- /* ARM-JTAG-EW lowlevel functions */
- typedef struct armjtagew_jtag
- {
- struct usb_dev_handle* usb_handle;
- } armjtagew_jtag_t;
-
- static armjtagew_jtag_t *armjtagew_usb_open(void);
- static void armjtagew_usb_close(armjtagew_jtag_t *armjtagew_jtag);
- static int armjtagew_usb_message(armjtagew_jtag_t *armjtagew_jtag, int out_length, int in_length);
- static int armjtagew_usb_write(armjtagew_jtag_t *armjtagew_jtag, int out_length);
- static int armjtagew_usb_read(armjtagew_jtag_t *armjtagew_jtag, int exp_in_length);
-
- /* helper functions */
- static int armjtagew_get_version_info(void);
-
- #ifdef _DEBUG_USB_COMMS_
- static void armjtagew_debug_buffer(u8 *buffer, int length);
- #endif
-
- static armjtagew_jtag_t* armjtagew_jtag_handle;
-
-
-
- /***************************************************************************/
- /* External interface implementation */
-
- jtag_interface_t armjtagew_interface =
- {
- .name = "arm-jtag-ew",
- .execute_queue = armjtagew_execute_queue,
- .speed = armjtagew_speed,
- .khz = armjtagew_khz,
- .register_commands = armjtagew_register_commands,
- .init = armjtagew_init,
- .quit = armjtagew_quit
- };
-
-
- static int armjtagew_execute_queue(void)
- {
- jtag_command_t *cmd = jtag_command_queue;
- int scan_size;
- enum scan_type type;
- u8 *buffer;
-
- while (cmd != NULL)
- {
- switch (cmd->type)
- {
- case JTAG_RUNTEST:
- DEBUG_JTAG_IO( "runtest %i cycles, end in %i", cmd->cmd.runtest->num_cycles, \
- cmd->cmd.runtest->end_state);
-
- armjtagew_end_state(cmd->cmd.runtest->end_state);
- armjtagew_runtest(cmd->cmd.runtest->num_cycles);
- break;
-
- case JTAG_STATEMOVE:
- DEBUG_JTAG_IO("statemove end in %i", cmd->cmd.statemove->end_state);
-
- armjtagew_end_state(cmd->cmd.statemove->end_state);
- armjtagew_state_move();
- break;
-
- case JTAG_PATHMOVE:
- DEBUG_JTAG_IO("pathmove: %i states, end in %i", \
- cmd->cmd.pathmove->num_states, \
- cmd->cmd.pathmove->path[cmd->cmd.pathmove->num_states - 1]);
-
- armjtagew_path_move(cmd->cmd.pathmove->num_states, cmd->cmd.pathmove->path);
- break;
-
- case JTAG_SCAN:
- DEBUG_JTAG_IO("scan end in %i", cmd->cmd.scan->end_state);
-
- armjtagew_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);
-
- #ifdef _DEBUG_USB_COMMS_
- armjtagew_debug_buffer(buffer, (scan_size + 7) / 8);
- #endif
- type = jtag_scan_type(cmd->cmd.scan);
- armjtagew_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);
-
- armjtagew_tap_execute();
-
- if (cmd->cmd.reset->trst == 1)
- {
- tap_set_state(TAP_RESET);
- }
- armjtagew_reset(cmd->cmd.reset->trst, cmd->cmd.reset->srst);
- break;
-
- case JTAG_SLEEP:
- DEBUG_JTAG_IO("sleep %i", cmd->cmd.sleep->us);
- armjtagew_tap_execute();
- jtag_sleep(cmd->cmd.sleep->us);
- break;
-
- default:
- LOG_ERROR("BUG: unknown JTAG command type encountered");
- exit(-1);
- }
- cmd = cmd->next;
- }
-
- return armjtagew_tap_execute();
- }
-
-
- /* Sets speed in kHz. */
- static int armjtagew_speed(int speed)
- {
- int result;
- int speed_real;
-
-
- usb_out_buffer[0] = CMD_SET_TCK_FREQUENCY;
- buf_set_u32(usb_out_buffer+1, 0, 32, speed);
-
- result = armjtagew_usb_message(armjtagew_jtag_handle, 4, 4);
-
- if (result < 0)
- {
- LOG_ERROR("ARM-JTAG-EW setting speed failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
- usb_out_buffer[0] = CMD_GET_TCK_FREQUENCY;
- result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 4);
- speed_real = (int)buf_get_u32(usb_in_buffer,0,32);
- if(result < 0)
- {
- LOG_ERROR("ARM-JTAG-EW getting speed failed (%d)", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
- else
- {
- LOG_INFO("Requested speed %dkHz, emulator reported %dkHz.", speed, speed_real);
- }
-
- return ERROR_OK;
- }
-
-
- static int armjtagew_khz(int khz, int *jtag_speed)
- {
- *jtag_speed = khz;
-
- return ERROR_OK;
- }
-
- static int armjtagew_register_commands(struct command_context_s *cmd_ctx)
- {
- register_command(cmd_ctx, NULL, "armjtagew_info", armjtagew_handle_armjtagew_info_command, COMMAND_EXEC,
- "query armjtagew info");
- return ERROR_OK;
- }
-
- static int armjtagew_init(void)
- {
- int check_cnt;
-
- armjtagew_jtag_handle = armjtagew_usb_open();
-
- if (armjtagew_jtag_handle == 0)
- {
- LOG_ERROR("Cannot find ARM-JTAG-EW Interface! Please check connection and permissions.");
- return ERROR_JTAG_INIT_FAILED;
- }
-
- check_cnt = 0;
- while (check_cnt < 3)
- {
- if (armjtagew_get_version_info() == ERROR_OK)
- {
- /* attempt to get status */
- armjtagew_get_status();
- break;
- }
-
- check_cnt++;
- }
-
- if (check_cnt == 3)
- {
- LOG_INFO("ARM-JTAG-EW initial read failed, don't worry");
- }
-
- LOG_INFO("ARM-JTAG-EW JTAG Interface ready");
-
- armjtagew_reset(0, 0);
- armjtagew_tap_init();
-
- return ERROR_OK;
- }
-
- static int armjtagew_quit(void)
- {
- armjtagew_usb_close(armjtagew_jtag_handle);
- return ERROR_OK;
- }
-
- /***************************************************************************/
- /* Queue command implementations */
-
- static void armjtagew_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 armjtagew_state_move(void)
- {
- int i;
- int tms = 0;
- u8 tms_scan = tap_get_tms_path(tap_get_state(), tap_get_end_state());
- int tms_count = tap_get_tms_path_len(tap_get_state(), tap_get_end_state());
-
- for (i = 0; i < tms_count; i++)
- {
- tms = (tms_scan >> i) & 1;
- armjtagew_tap_append_step(tms, 0);
- }
-
- tap_set_state(tap_get_end_state());
- }
-
- static void armjtagew_path_move(int num_states, tap_state_t *path)
- {
- int i;
-
- for (i = 0; i < num_states; i++)
- {
- /*
- * TODO: The ARM-JTAG-EW hardware delays TDI with 3 TCK cycles when in RTCK mode.
- * Either handle that here, or update the documentation with examples
- * how to fix that in the configuration files.
- */
- if (path[i] == tap_state_transition(tap_get_state(), false))
- {
- armjtagew_tap_append_step(0, 0);
- }
- else if (path[i] == tap_state_transition(tap_get_state(), true))
- {
- armjtagew_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 armjtagew_runtest(int num_cycles)
- {
- int i;
-
- tap_state_t saved_end_state = tap_get_end_state();
-
- /* only do a state_move when we're not already in IDLE */
- if (tap_get_state() != TAP_IDLE)
- {
- armjtagew_end_state(TAP_IDLE);
- armjtagew_state_move();
- }
-
- /* execute num_cycles */
- for (i = 0; i < num_cycles; i++)
- {
- armjtagew_tap_append_step(0, 0);
- }
-
- /* finish in end_state */
- armjtagew_end_state(saved_end_state);
- if (tap_get_state() != tap_get_end_state())
- {
- armjtagew_state_move();
- }
- }
-
- static void armjtagew_scan(bool ir_scan, enum scan_type type, u8 *buffer, int scan_size, scan_command_t *command)
- {
- tap_state_t saved_end_state;
-
- armjtagew_tap_ensure_space(1, scan_size + 8);
-
- saved_end_state = tap_get_end_state();
-
- /* Move to appropriate scan state */
- armjtagew_end_state(ir_scan ? TAP_IRSHIFT : TAP_DRSHIFT);
-
- armjtagew_state_move();
- armjtagew_end_state(saved_end_state);
-
- /* Scan */
- armjtagew_tap_append_scan(scan_size, buffer, command);
-
- /* We are in Exit1, go to Pause */
- armjtagew_tap_append_step(0, 0);
-
- tap_set_state(ir_scan ? TAP_IRPAUSE : TAP_DRPAUSE);
-
- if (tap_get_state() != tap_get_end_state())
- {
- armjtagew_state_move();
- }
- }
-
- static void armjtagew_reset(int trst, int srst)
- {
- const u8 trst_mask = (1u<<5);
- const u8 srst_mask = (1u<<6);
- u8 val = 0;
- u8 outp_en = 0;
- u8 change_mask = 0;
- int result;
-
- LOG_DEBUG("trst: %i, srst: %i", trst, srst);
-
- if (srst == 0)
- {
- val |= srst_mask;
- outp_en &= ~srst_mask; /* tristate */
- change_mask |= srst_mask;
- }
- else if (srst == 1)
- {
- val &= ~srst_mask;
- outp_en |= srst_mask;
- change_mask |= srst_mask;
- }
-
- if (trst == 0)
- {
- val |= trst_mask;
- outp_en &= ~trst_mask; /* tristate */
- change_mask |= trst_mask;
- }
- else if (trst == 1)
- {
- val &= ~trst_mask;
- outp_en |= trst_mask;
- change_mask |= trst_mask;
- }
-
- usb_out_buffer[0] = CMD_SET_TAPHW_STATE;
- usb_out_buffer[1] = val;
- usb_out_buffer[2] = outp_en;
- usb_out_buffer[3] = change_mask;
- result = armjtagew_usb_write(armjtagew_jtag_handle, 4);
- if (result != 4)
- {
- LOG_ERROR("ARM-JTAG-EW TRST/SRST pin set failed failed (%d)", result);
- }
- }
-
-
- static int armjtagew_get_status(void)
- {
- int result;
-
- usb_out_buffer[0] = CMD_GET_TAPHW_STATE;
- result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 12);
-
- if (result == 0)
- {
- unsigned int u_tg = buf_get_u32(usb_in_buffer, 0, 16);
- LOG_INFO("U_tg = %d mV, U_aux = %d mV, U_tgpwr = %d mV, I_tgpwr = %d mA, D1 = %d, Target power %s %s\n", \
- buf_get_u32(usb_in_buffer + 0, 0, 16), \
- buf_get_u32(usb_in_buffer + 2, 0, 16), \
- buf_get_u32(usb_in_buffer + 4, 0, 16), \
- buf_get_u32(usb_in_buffer + 6, 0, 16), \
- usb_in_buffer[9], \
- usb_in_buffer[11] ? "OVERCURRENT" : "OK", \
- usb_in_buffer[10] ? "enabled" : "disabled");
-
- if (u_tg < 1500)
- {
- LOG_ERROR("Vref too low. Check Target Power\n");
- }
- }
- else
- {
- LOG_ERROR("ARM-JTAG-EW command CMD_GET_TAPHW_STATE failed (%d)\n", result);
- }
-
- return ERROR_OK;
- }
-
- static int armjtagew_get_version_info(void)
- {
- int result;
- char sn[16];
- char auxinfo[257];
-
- /* query hardware version */
- usb_out_buffer[0] = CMD_GET_VERSION;
- result = armjtagew_usb_message(armjtagew_jtag_handle, 1, 4+15+256);
-
- if (result != 0)
- {
- LOG_ERROR("ARM-JTAG-EW command CMD_GET_VERSION failed (%d)\n", result);
- return ERROR_JTAG_DEVICE_ERROR;
- }
-
-
- memcpy(sn, usb_in_buffer+4, 15);
- sn[15] = '\0';
- memcpy(auxinfo, usb_in_buffer+4+15, 256);
- auxinfo[256] = '\0';
-
- LOG_INFO("ARM-JTAG-EW firmware version %d.%d, hardware revision %c, SN=%s, Additional info: %s", \
- usb_in_buffer[1], usb_in_buffer[0], \
- isgraph(usb_in_buffer[2]) ? usb_in_buffer[2] : 'X', \
- sn, auxinfo);
- return ERROR_OK;
- }
-
- static int armjtagew_handle_armjtagew_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc)
- {
- if (armjtagew_get_version_info() == ERROR_OK)
- {
- /* attempt to get status */
- armjtagew_get_status();
- }
-
- return ERROR_OK;
- }
-
- /***************************************************************************/
- /* ARM-JTAG-EW tap functions */
-
- /* 2048 is the max value we can use here */
- #define ARMJTAGEW_TAP_BUFFER_SIZE 2048
-
- static int tap_length;
- static u8 tms_buffer[ARMJTAGEW_TAP_BUFFER_SIZE];
- static u8 tdi_buffer[ARMJTAGEW_TAP_BUFFER_SIZE];
- static u8 tdo_buffer[ARMJTAGEW_TAP_BUFFER_SIZE];
-
- typedef struct
- {
- int first; /* First bit position in tdo_buffer to read */
- int length; /* Number of bits to read */
- scan_command_t *command; /* Corresponding scan command */
- u8 *buffer;
- } pending_scan_result_t;
-
- #define MAX_PENDING_SCAN_RESULTS 256
-
- static int pending_scan_results_length;
- static pending_scan_result_t pending_scan_results_buffer[MAX_PENDING_SCAN_RESULTS];
-
- static int last_tms;
-
- static void armjtagew_tap_init(void)
- {
- tap_length = 0;
- pending_scan_results_length = 0;
- }
-
- static void armjtagew_tap_ensure_space(int scans, int bits)
- {
- int available_scans = MAX_PENDING_SCAN_RESULTS - pending_scan_results_length;
- int available_bits = ARMJTAGEW_TAP_BUFFER_SIZE * 8 - tap_length;
-
- if (scans > available_scans || bits > available_bits)
- {
- armjtagew_tap_execute();
- }
- }
-
- static void armjtagew_tap_append_step(int tms, int tdi)
- {
- last_tms = tms;
- int index = tap_length / 8;
-
- if (index < ARMJTAGEW_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("armjtagew_tap_append_step, overflow");
- }
- }
-
- void armjtagew_tap_append_scan(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->first = tap_length;
- pending_scan_result->length = length;
- pending_scan_result->command = command;
- pending_scan_result->buffer = buffer;
-
- for (i = 0; i < length; i++)
- {
- armjtagew_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 idle or pause state. */
- static int armjtagew_tap_execute(void)
- {
- int byte_length;
- int tms_offset;
- int tdi_offset;
- 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. */
- armjtagew_tap_append_step(last_tms, 0);
- }
-
- byte_length = tap_length / 8;
-
- usb_out_buffer[0] = CMD_TAP_SHIFT;
- buf_set_u32(usb_out_buffer+1, 0, 16, byte_length);
-
- tms_offset = 3;
- for (i = 0; i < byte_length; i++)
- {
- usb_out_buffer[tms_offset + i] = flip_u32(tms_buffer[i],8);
- }
-
- tdi_offset = tms_offset + byte_length;
- for (i = 0; i < byte_length; i++)
- {
- usb_out_buffer[tdi_offset + i] = flip_u32(tdi_buffer[i],8);
- }
-
- result = armjtagew_usb_message(armjtagew_jtag_handle, 3 + 2 * byte_length, byte_length + 4);
-
- if (result == 0)
- {
- int stat;
-
- stat = (int)buf_get_u32(usb_in_buffer + byte_length, 0, 32);
- if(stat) {
- LOG_ERROR("armjtagew_tap_execute, emulator returned error code %d for a CMD_TAP_SHIFT command", stat);
- return ERROR_JTAG_QUEUE_FAILED;
- }
-
- for (i = 0; i < byte_length; i++)
- {
- tdo_buffer[i] = flip_u32(usb_in_buffer[i],8);
- }
-
- 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->first;
- scan_command_t *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);
-
- #ifdef _DEBUG_USB_COMMS_
- armjtagew_debug_buffer(buffer, byte_length);
- #endif
-
- if (jtag_read_buffer(buffer, command) != ERROR_OK)
- {
- armjtagew_tap_init();
- return ERROR_JTAG_QUEUE_FAILED;
- }
-
- if (pending_scan_result->buffer != NULL)
- {
- free(pending_scan_result->buffer);
- }
- }
- }
- else
- {
- LOG_ERROR("armjtagew_tap_execute, wrong result %d, expected %d", result, byte_length);
- return ERROR_JTAG_QUEUE_FAILED;
- }
-
- armjtagew_tap_init();
- }
-
- return ERROR_OK;
- }
-
- /*****************************************************************************/
- /* JLink USB low-level functions */
-
- static armjtagew_jtag_t* armjtagew_usb_open()
- {
- struct usb_bus *busses;
- struct usb_bus *bus;
- struct usb_device *dev;
-
- armjtagew_jtag_t *result;
-
- result = (armjtagew_jtag_t*) malloc(sizeof(armjtagew_jtag_t));
-
- usb_init();
- usb_find_busses();
- usb_find_devices();
-
- busses = usb_get_busses();
-
- /* find armjtagew_jtag device in usb bus */
-
- for (bus = busses; bus; bus = bus->next)
- {
- for (dev = bus->devices; dev; dev = dev->next)
- {
- if ((dev->descriptor.idVendor == USB_VID) && (dev->descriptor.idProduct == USB_PID))
- {
- result->usb_handle = usb_open(dev);
-
- #if 0
- /* usb_set_configuration required under win32 */
- usb_set_configuration(result->usb_handle, dev->config[0].bConfigurationValue);
- #endif
- usb_claim_interface(result->usb_handle, 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
- return result;
- }
- }
- }
-
- free(result);
- return NULL;
- }
-
- static void armjtagew_usb_close(armjtagew_jtag_t *armjtagew_jtag)
- {
- usb_close(armjtagew_jtag->usb_handle);
- free(armjtagew_jtag);
- }
-
- /* Send a message and receive the reply. */
- static int armjtagew_usb_message(armjtagew_jtag_t *armjtagew_jtag, int out_length, int in_length)
- {
- int result;
-
- result = armjtagew_usb_write(armjtagew_jtag, out_length);
- if (result == out_length)
- {
- result = armjtagew_usb_read(armjtagew_jtag, in_length);
- if (result != in_length)
- {
- LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result);
- return -1;
- }
- }
- else
- {
- LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result);
- return -1;
- }
- return 0;
- }
-
- /* Write data from out_buffer to USB. */
- static int armjtagew_usb_write(armjtagew_jtag_t *armjtagew_jtag, int out_length)
- {
- int result;
-
- if (out_length > ARMJTAGEW_OUT_BUFFER_SIZE)
- {
- LOG_ERROR("armjtagew_jtag_write illegal out_length=%d (max=%d)", out_length, ARMJTAGEW_OUT_BUFFER_SIZE);
- return -1;
- }
-
- result = usb_bulk_write(armjtagew_jtag->usb_handle, ARMJTAGEW_EPT_BULK_OUT, \
- (char*)usb_out_buffer, out_length, ARMJTAGEW_USB_TIMEOUT);
-
- DEBUG_JTAG_IO("armjtagew_usb_write, out_length = %d, result = %d", out_length, result);
-
- #ifdef _DEBUG_USB_COMMS_
- armjtagew_debug_buffer(usb_out_buffer, out_length);
- #endif
- return result;
- }
-
- /* Read data from USB into in_buffer. */
- static int armjtagew_usb_read(armjtagew_jtag_t *armjtagew_jtag, int exp_in_length)
- {
- int result = usb_bulk_read(armjtagew_jtag->usb_handle, ARMJTAGEW_EPT_BULK_IN, \
- (char*)usb_in_buffer, exp_in_length, ARMJTAGEW_USB_TIMEOUT);
-
- DEBUG_JTAG_IO("armjtagew_usb_read, result = %d", result);
-
- #ifdef _DEBUG_USB_COMMS_
- armjtagew_debug_buffer(usb_in_buffer, result);
- #endif
- return result;
- }
-
-
- #ifdef _DEBUG_USB_COMMS_
- #define BYTES_PER_LINE 16
-
- static void armjtagew_debug_buffer(u8 *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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