diff --git a/src/jtag/jlink.c b/src/jtag/jlink.c index 1c7a39887..d68196876 100644 --- a/src/jtag/jlink.c +++ b/src/jtag/jlink.c @@ -230,31 +230,26 @@ static int jlink_speed(int speed) { int result; - if (speed <= JLINK_MAX_SPEED) + if (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_jtag_handle, 3); - - if (result == 3) - { - return ERROR_OK; - } - else - { - LOG_ERROR("J-Link setting speed failed (%d)", result); - return ERROR_JTAG_DEVICE_ERROR; - } + LOG_INFO("Ignoring speed request: %dkHz exceeds %dkHz maximum", + speed, JLINK_MAX_SPEED); + return ERROR_OK; } - else + + /* 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_jtag_handle, 3); + if (result != 3) { - LOG_INFO("Requested speed %dkHz exceeds maximum of %dkHz, ignored", speed, JLINK_MAX_SPEED); + LOG_ERROR("J-Link setting speed failed (%d)", result); + return ERROR_JTAG_DEVICE_ERROR; } return ERROR_OK; @@ -485,53 +480,55 @@ static int jlink_get_status(void) int result; jlink_simple_command(EMU_CMD_GET_STATE); + result = jlink_usb_read(jlink_jtag_handle, 8); - - if (result == 8) - { - 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\n", \ - 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\n"); - } - } - else + if (result != 8) { LOG_ERROR("J-Link command EMU_CMD_GET_STATE failed (%d)\n", 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\n", \ + 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\n"); + return ERROR_OK; } static int jlink_get_version_info(void) { int result; - int len = 0; + int len; /* query hardware version */ jlink_simple_command(EMU_CMD_VERSION); + result = jlink_usb_read(jlink_jtag_handle, 2); - - if (result == 2) + if (2 != result) { - len = buf_get_u32(usb_in_buffer, 0, 16); - result = jlink_usb_read(jlink_jtag_handle, len); - - if (result == len) - { - usb_in_buffer[result] = 0; - LOG_INFO("%s", (char *)usb_in_buffer); - return ERROR_OK; - } + LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", + result); + return ERROR_JTAG_DEVICE_ERROR; } - LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", result); - return ERROR_JTAG_DEVICE_ERROR; + len = buf_get_u32(usb_in_buffer, 0, 16); + result = jlink_usb_read(jlink_jtag_handle, len); + if (result != len) + { + LOG_ERROR("J-Link command EMU_CMD_VERSION failed (%d)\n", + result); + return ERROR_JTAG_DEVICE_ERROR; + } + + usb_in_buffer[result] = 0; + LOG_INFO("%s", (char *)usb_in_buffer); + + return ERROR_OK; } static int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, char *cmd, char **args, int argc) @@ -551,7 +548,7 @@ static int jlink_handle_jlink_info_command(struct command_context_s *cmd_ctx, ch /* 2048 is the max value we can use here */ #define JLINK_TAP_BUFFER_SIZE 2048 -static int tap_length; +static unsigned tap_length; static u8 tms_buffer[JLINK_TAP_BUFFER_SIZE]; static u8 tdi_buffer[JLINK_TAP_BUFFER_SIZE]; static u8 tdo_buffer[JLINK_TAP_BUFFER_SIZE]; @@ -593,40 +590,32 @@ static void jlink_tap_append_step(int tms, int tdi) last_tms = tms; int index = tap_length / 8; - if (index < JLINK_TAP_BUFFER_SIZE) + if (index >= JLINK_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++; + LOG_ERROR("jlink_tap_append_step: overflow"); + exit(-1); } + + int bit_index = tap_length % 8; + u8 bit = 1 << bit_index; + + if (tms) + tms_buffer[index] |= bit; else - { - LOG_ERROR("jlink_tap_append_step, overflow"); - } + tms_buffer[index] &= ~bit; + + if (tdi) + tdi_buffer[index] |= bit; + else + tdi_buffer[index] &= ~bit; + + tap_length++; } static void jlink_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]; + pending_scan_result_t *pending_scan_result = + &pending_scan_results_buffer[pending_scan_results_length]; int i; pending_scan_result->first = tap_length; @@ -636,7 +625,9 @@ static void jlink_tap_append_scan(int length, u8 *buffer, scan_command_t *comman for (i = 0; i < length; i++) { - jlink_tap_append_step((i < length-1 ? 0 : 1), (buffer[i/8] >> (i%8)) & 1); + int tms = i < length - 1 ? 0 : 1; + int tdi = buffer[i / 8] & (1 << (i % 8)); + jlink_tap_append_step(tms, tdi); } pending_scan_results_length++; } @@ -651,82 +642,79 @@ static int jlink_tap_execute(void) int i; int result; - if (tap_length > 0) + if (!tap_length) + return ERROR_OK; + + /* Pad last byte so that tap_length is divisible by 8 */ + while (tap_length % 8 != 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. */ - jlink_tap_append_step(last_tms, 0); - } + /* More of the last TMS value keeps us in the same state, + * analogous to free-running JTAG interfaces. */ + jlink_tap_append_step(last_tms, 0); + } - byte_length = tap_length / 8; + byte_length = tap_length / 8; - usb_out_buffer[0] = EMU_CMD_HW_JTAG3; - usb_out_buffer[1] = 0; - usb_out_buffer[2] = (tap_length >> 0) & 0xff; - usb_out_buffer[3] = (tap_length >> 8) & 0xff; + usb_out_buffer[0] = EMU_CMD_HW_JTAG3; + usb_out_buffer[1] = 0; + usb_out_buffer[2] = (tap_length >> 0) & 0xff; + usb_out_buffer[3] = (tap_length >> 8) & 0xff; - tms_offset = 4; - for (i = 0; i < byte_length; i++) - { - usb_out_buffer[tms_offset + i] = tms_buffer[i]; - } + tms_offset = 4; + for (i = 0; i < byte_length; i++) + { + usb_out_buffer[tms_offset + i] = tms_buffer[i]; + } - tdi_offset = tms_offset + byte_length; - for (i = 0; i < byte_length; i++) - { - usb_out_buffer[tdi_offset + i] = tdi_buffer[i]; - } + tdi_offset = tms_offset + byte_length; + for (i = 0; i < byte_length; i++) + { + usb_out_buffer[tdi_offset + i] = tdi_buffer[i]; + } - result = jlink_usb_message(jlink_jtag_handle, 4 + 2 * byte_length, byte_length); + result = jlink_usb_message(jlink_jtag_handle, 4 + 2 * byte_length, byte_length); - if (result == byte_length) - { - for (i = 0; i < byte_length; i++) - { - tdo_buffer[i] = usb_in_buffer[i]; - } + if (result != byte_length) + { + LOG_ERROR("jlink_tap_execute, wrong result %d (expected %d)", + result, byte_length); + return ERROR_JTAG_QUEUE_FAILED; + } - 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; + for (i = 0; i < byte_length; i++) + tdo_buffer[i] = usb_in_buffer[i]; - /* Copy to buffer */ - buf_set_buf(tdo_buffer, first, buffer, 0, 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->first; + scan_command_t *command = pending_scan_result->command; - DEBUG_JTAG_IO("pending scan result, length = %d", length); + /* 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_ - jlink_debug_buffer(buffer, byte_length); + jlink_debug_buffer(buffer, byte_length); #endif - 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); - } - } - } - else + if (jtag_read_buffer(buffer, command) != ERROR_OK) { - LOG_ERROR("jlink_tap_execute, wrong result %d, expected %d", result, byte_length); + jlink_tap_init(); return ERROR_JTAG_QUEUE_FAILED; } - jlink_tap_init(); + if (pending_scan_result->buffer != NULL) + { + free(pending_scan_result->buffer); + } } + jlink_tap_init(); + return ERROR_OK; } @@ -792,59 +780,48 @@ static int jlink_usb_message(jlink_jtag_t *jlink_jtag, int out_length, int in_le int result2; result = jlink_usb_write(jlink_jtag, out_length); - if (result == out_length) + if (result != out_length) { - result = jlink_usb_read(jlink_jtag, in_length); - if (result == in_length || result == in_length+1) + LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", + out_length, result); + return ERROR_JTAG_DEVICE_ERROR; + } + + result = jlink_usb_read(jlink_jtag, 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 (result == in_length) + { + /* Must read the result from the EMU too */ + result2 = jlink_usb_read_emu_result(jlink_jtag); + if (1 != result2) { - if (result == in_length) - { - /* Must read the result from the EMU too */ - result2 = jlink_usb_read_emu_result(jlink_jtag); - if (1 == result2) - { - /* Check the result itself */ - if (0 == usb_emu_result_buffer[0]) - { - return result; - } - else - { - LOG_ERROR("jlink_usb_read_emu_result (requested=0, result=%d)", usb_emu_result_buffer[0]); - return -1; - } - } - else - { - LOG_ERROR("jlink_usb_read_emu_result len (requested=1, result=%d)", result2); - return -1; - } - } - else - { - /* Check the result itself */ - if (0 == usb_in_buffer[result-1]) - { - return result-1; - } - else - { - LOG_ERROR("jlink_usb_read_emu_result (requested=0, result=%d)", usb_in_buffer[result]); - return -1; - } - } - } - else - { - LOG_ERROR("usb_bulk_read failed (requested=%d, result=%d)", in_length, result); - return -1; + 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 { - LOG_ERROR("usb_bulk_write failed (requested=%d, result=%d)", out_length, result); - return -1; + /* 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 */