1 /***************************************************************************
2 * Copyright (C) 2013 by mike brown *
3 * mike@theshedworks.org.uk *
5 * Copyright (C) 2013 by Spencer Oliver *
6 * spen@spen-soft.co.uk *
8 * This program is free software; you can redistribute it and/or modify *
9 * it under the terms of the GNU General Public License as published by *
10 * the Free Software Foundation; either version 2 of the License, or *
11 * (at your option) any later version. *
13 * This program is distributed in the hope that it will be useful, *
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
16 * GNU General Public License for more details. *
18 * You should have received a copy of the GNU General Public License *
19 * along with this program; if not, write to the *
20 * Free Software Foundation, Inc., *
21 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
22 ***************************************************************************/
28 #include <transport/transport.h>
30 #include <jtag/interface.h>
31 #include <jtag/commands.h>
36 #ifdef _DEBUG_JTAG_IO_
37 #define DEBUG_IO(expr...) LOG_DEBUG(expr)
39 #define DEBUG_IO(expr...) do {} while (0)
43 * See CMSIS-DAP documentation:
44 * Version 0.01 - Beta.
49 /* Known vid/pid pairs:
50 * VID 0xc251: Keil Software
51 * PID 0xf001: LPC-Link-II CMSIS_DAP
52 * PID 0xf002: OPEN-SDA CMSIS_DAP (Freedom Board)
53 * PID 0x2722: Keil ULINK2 CMSIS-DAP
55 * VID 0x0d28: mbed Software
56 * PID 0x0204: MBED CMSIS-DAP
60 /* vid = pid = 0 marks the end of the list */
61 static uint16_t cmsis_dap_vid[MAX_USB_IDS + 1] = { 0 };
62 static uint16_t cmsis_dap_pid[MAX_USB_IDS + 1] = { 0 };
65 #define PACKET_SIZE (64 + 1) /* 64 bytes plus report id */
66 #define USB_TIMEOUT 1000
68 /* CMSIS-DAP General Commands */
69 #define CMD_DAP_INFO 0x00
70 #define CMD_DAP_LED 0x01
71 #define CMD_DAP_CONNECT 0x02
72 #define CMD_DAP_DISCONNECT 0x03
73 #define CMD_DAP_WRITE_ABORT 0x08
74 #define CMD_DAP_DELAY 0x09
75 #define CMD_DAP_RESET_TARGET 0x0A
78 #define INFO_ID_VID 0x00 /* string */
79 #define INFO_ID_PID 0x02 /* string */
80 #define INFO_ID_SERNUM 0x03 /* string */
81 #define INFO_ID_FW_VER 0x04 /* string */
82 #define INFO_ID_TD_VEND 0x05 /* string */
83 #define INFO_ID_TD_NAME 0x06 /* string */
84 #define INFO_ID_CAPS 0xf0 /* byte */
85 #define INFO_ID_PKT_CNT 0xfe /* byte */
86 #define INFO_ID_PKT_SZ 0xff /* short */
88 #define INFO_CAPS_SWD 0x01
89 #define INFO_CAPS_JTAG 0x02
92 #define LED_ID_CONNECT 0x00
93 #define LED_ID_RUN 0x01
99 #define CONNECT_DEFAULT 0x00
100 #define CONNECT_SWD 0x01
101 #define CONNECT_JTAG 0x02
103 /* CMSIS-DAP Common SWD/JTAG Commands */
104 #define CMD_DAP_DELAY 0x09
105 #define CMD_DAP_SWJ_PINS 0x10
106 #define CMD_DAP_SWJ_CLOCK 0x11
107 #define CMD_DAP_SWJ_SEQ 0x12
119 /* CMSIS-DAP SWD Commands */
120 #define CMD_DAP_SWD_CONFIGURE 0x13
122 /* CMSIS-DAP JTAG Commands */
123 #define CMD_DAP_JTAG_SEQ 0x14
124 #define CMD_DAP_JTAG_CONFIGURE 0x15
125 #define CMD_DAP_JTAG_IDCODE 0x16
127 /* CMSIS-DAP Transfer Commands */
128 #define CMD_DAP_TFER_CONFIGURE 0x04
129 #define CMD_DAP_TFER 0x05
130 #define CMD_DAP_TFER_BLOCK 0x06
131 #define CMD_DAP_TFER_ABORT 0x07
133 /* DAP Status Code */
135 #define DAP_ERROR 0xFF
137 /* CMSIS-DAP Vendor Commands
140 static char *info_caps_str[] = {
145 /* max clock speed (kHz) */
146 #define DAP_MAX_CLOCK 5000
149 hid_device *dev_handle;
150 uint16_t packet_size;
151 uint16_t packet_count;
152 uint8_t *packet_buffer;
157 static struct cmsis_dap *cmsis_dap_handle;
159 static int cmsis_dap_usb_open(void)
161 hid_device *dev = NULL;
163 struct hid_device_info *devs, *cur_dev;
164 unsigned short target_vid, target_pid;
170 The CMSIS-DAP specification stipulates:
171 "The Product String must contain "CMSIS-DAP" somewhere in the string. This is used by the
172 debuggers to idenify a CMSIS-DAP compliant Debug Unit that is connected to a host computer."
174 devs = hid_enumerate(0x0, 0x0);
176 while (NULL != cur_dev) {
177 if (0 == cmsis_dap_vid[0]) {
178 if (NULL == cur_dev->product_string) {
179 LOG_DEBUG("Cannot read product string of device 0x%x:0x%x",
180 cur_dev->vendor_id, cur_dev->product_id);
182 if (wcsstr(cur_dev->product_string, L"CMSIS-DAP"))
184 if the user hasn't specified VID:PID *and*
185 product string contains "CMSIS-DAP", pick it
191 otherwise, exhaustively compare against all VID:PID in list
193 for (i = 0; cmsis_dap_vid[i] || cmsis_dap_pid[i]; i++) {
194 if ((cmsis_dap_vid[i] == cur_dev->vendor_id) && (cmsis_dap_pid[i] == cur_dev->product_id))
197 if (cmsis_dap_vid[i] || cmsis_dap_pid[i])
201 cur_dev = cur_dev->next;
204 if (NULL != cur_dev) {
205 target_vid = cur_dev->vendor_id;
206 target_pid = cur_dev->product_id;
209 hid_free_enumeration(devs);
211 if (hid_init() != 0) {
212 LOG_ERROR("unable to open HIDAPI");
216 dev = hid_open(target_vid, target_pid, NULL);
219 LOG_ERROR("unable to open CMSIS-DAP device");
223 struct cmsis_dap *dap = malloc(sizeof(struct cmsis_dap));
225 LOG_ERROR("unable to allocate memory");
229 dap->dev_handle = dev;
233 cmsis_dap_handle = dap;
235 /* allocate default packet buffer, may be changed later.
236 * currently with HIDAPI we have no way of getting the output report length
237 * without this info we cannot communicate with the adapter.
238 * For the moment we ahve to hard code the packet size */
240 int packet_size = PACKET_SIZE;
242 /* atmel cmsis-dap uses 512 byte reports */
243 if (target_vid == 0x03eb)
244 packet_size = 512 + 1;
246 cmsis_dap_handle->packet_buffer = malloc(packet_size);
247 cmsis_dap_handle->packet_size = packet_size;
249 if (cmsis_dap_handle->packet_buffer == NULL) {
250 LOG_ERROR("unable to allocate memory");
257 static void cmsis_dap_usb_close(struct cmsis_dap *dap)
259 hid_close(dap->dev_handle);
262 if (cmsis_dap_handle->packet_buffer)
263 free(cmsis_dap_handle->packet_buffer);
265 if (cmsis_dap_handle) {
266 free(cmsis_dap_handle);
267 cmsis_dap_handle = NULL;
273 /* Send a message and receive the reply */
274 static int cmsis_dap_usb_xfer(struct cmsis_dap *dap, int txlen)
276 /* Pad the rest of the TX buffer with 0's */
277 memset(dap->packet_buffer + txlen, 0, dap->packet_size - 1 - txlen);
279 /* write data to device */
280 int retval = hid_write(dap->dev_handle, dap->packet_buffer, dap->packet_size);
282 LOG_ERROR("error writing data: %ls", hid_error(dap->dev_handle));
287 retval = hid_read_timeout(dap->dev_handle, dap->packet_buffer, dap->packet_size, USB_TIMEOUT);
288 if (retval == -1 || retval == 0) {
289 LOG_DEBUG("error reading data: %ls", hid_error(dap->dev_handle));
296 static int cmsis_dap_cmd_DAP_SWJ_Pins(uint8_t pins, uint8_t mask, uint32_t delay, uint8_t *input)
299 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
301 buffer[0] = 0; /* report number */
302 buffer[1] = CMD_DAP_SWJ_PINS;
305 buffer[4] = delay & 0xff;
306 buffer[5] = (delay >> 8) & 0xff;
307 buffer[6] = (delay >> 16) & 0xff;
308 buffer[7] = (delay >> 24) & 0xff;
309 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 8);
311 if (retval != ERROR_OK) {
312 LOG_ERROR("CMSIS-DAP command CMD_DAP_SWJ_PINS failed.");
313 return ERROR_JTAG_DEVICE_ERROR;
322 static int cmsis_dap_cmd_DAP_SWJ_Clock(uint32_t swj_clock)
325 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
327 /* set clock in Hz */
329 buffer[0] = 0; /* report number */
330 buffer[1] = CMD_DAP_SWJ_CLOCK;
331 buffer[2] = swj_clock & 0xff;
332 buffer[3] = (swj_clock >> 8) & 0xff;
333 buffer[4] = (swj_clock >> 16) & 0xff;
334 buffer[5] = (swj_clock >> 24) & 0xff;
335 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 6);
337 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
338 LOG_ERROR("CMSIS-DAP command CMD_DAP_SWJ_CLOCK failed.");
339 return ERROR_JTAG_DEVICE_ERROR;
345 static int cmsis_dap_cmd_DAP_Info(uint8_t info, uint8_t **data)
348 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
350 buffer[0] = 0; /* report number */
351 buffer[1] = CMD_DAP_INFO;
353 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 3);
355 if (retval != ERROR_OK) {
356 LOG_ERROR("CMSIS-DAP command CMD_INFO failed.");
357 return ERROR_JTAG_DEVICE_ERROR;
360 *data = &(buffer[1]);
365 static int cmsis_dap_cmd_DAP_LED(uint8_t leds)
368 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
370 buffer[0] = 0; /* report number */
371 buffer[1] = CMD_DAP_LED;
374 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 4);
376 if (retval != ERROR_OK || buffer[1] != 0x00) {
377 LOG_ERROR("CMSIS-DAP command CMD_LED failed.");
378 return ERROR_JTAG_DEVICE_ERROR;
384 static int cmsis_dap_cmd_DAP_Connect(uint8_t mode)
387 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
389 buffer[0] = 0; /* report number */
390 buffer[1] = CMD_DAP_CONNECT;
392 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 3);
394 if (retval != ERROR_OK) {
395 LOG_ERROR("CMSIS-DAP command CMD_CONNECT failed.");
396 return ERROR_JTAG_DEVICE_ERROR;
399 if (buffer[1] != mode) {
400 LOG_ERROR("CMSIS-DAP failed to connect in mode (%d)", mode);
401 return ERROR_JTAG_DEVICE_ERROR;
407 static int cmsis_dap_cmd_DAP_Disconnect(void)
410 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
412 buffer[0] = 0; /* report number */
413 buffer[1] = CMD_DAP_DISCONNECT;
414 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 2);
416 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
417 LOG_ERROR("CMSIS-DAP command CMD_DISCONNECT failed.");
418 return ERROR_JTAG_DEVICE_ERROR;
424 static int cmsis_dap_cmd_DAP_TFER_Configure(uint8_t idle, uint16_t delay, uint16_t retry)
427 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
429 buffer[0] = 0; /* report number */
430 buffer[1] = CMD_DAP_TFER_CONFIGURE;
432 buffer[3] = delay & 0xff;
433 buffer[4] = (delay >> 8) & 0xff;
434 buffer[5] = retry & 0xff;
435 buffer[6] = (retry >> 8) & 0xff;
436 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
438 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
439 LOG_ERROR("CMSIS-DAP command CMD_TFER_Configure failed.");
440 return ERROR_JTAG_DEVICE_ERROR;
446 static int cmsis_dap_cmd_DAP_SWD_Configure(uint8_t cfg)
449 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
451 buffer[0] = 0; /* report number */
452 buffer[1] = CMD_DAP_SWD_CONFIGURE;
454 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 3);
456 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
457 LOG_ERROR("CMSIS-DAP command CMD_SWD_Configure failed.");
458 return ERROR_JTAG_DEVICE_ERROR;
465 static int cmsis_dap_cmd_DAP_Delay(uint16_t delay_us)
468 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
470 buffer[0] = 0; /* report number */
471 buffer[1] = CMD_DAP_DELAY;
472 buffer[2] = delay_us & 0xff;
473 buffer[3] = (delay_us >> 8) & 0xff;
474 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 4);
476 if (retval != ERROR_OK || buffer[1] != DAP_OK) {
477 LOG_ERROR("CMSIS-DAP command CMD_Delay failed.");
478 return ERROR_JTAG_DEVICE_ERROR;
485 static int queued_retval;
487 static void cmsis_dap_swd_read_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t *value)
489 if (queued_retval != ERROR_OK)
492 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
496 DEBUG_IO("CMSIS-DAP: Read Reg 0x%02" PRIx8, cmd);
498 buffer[0] = 0; /* report number */
499 buffer[1] = CMD_DAP_TFER;
503 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
505 /* TODO - need better response checking */
506 if (retval != ERROR_OK || buffer[1] != 0x01) {
507 LOG_ERROR("CMSIS-DAP: Read Error (0x%02" PRIx8 ")", buffer[2]);
508 queued_retval = buffer[2];
512 val = le_to_h_u32(&buffer[3]);
513 DEBUG_IO("0x%08" PRIx32, val);
518 queued_retval = retval;
521 static void cmsis_dap_swd_write_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t value)
523 if (queued_retval != ERROR_OK)
526 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
528 DEBUG_IO("CMSIS-DAP: Write Reg 0x%02" PRIx8 " 0x%08" PRIx32, cmd, value);
530 buffer[0] = 0; /* report number */
531 buffer[1] = CMD_DAP_TFER;
535 buffer[5] = (value) & 0xff;
536 buffer[6] = (value >> 8) & 0xff;
537 buffer[7] = (value >> 16) & 0xff;
538 buffer[8] = (value >> 24) & 0xff;
539 int retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 9);
541 if (buffer[1] != 0x01) {
542 LOG_ERROR("CMSIS-DAP: Write Error (0x%02" PRIx8 ")", buffer[2]);
546 queued_retval = retval;
549 static int cmsis_dap_swd_run(struct adiv5_dap *dap)
551 int retval = queued_retval;
552 queued_retval = ERROR_OK;
556 static int cmsis_dap_get_version_info(void)
560 /* INFO_ID_FW_VER - string */
561 int retval = cmsis_dap_cmd_DAP_Info(INFO_ID_FW_VER, &data);
562 if (retval != ERROR_OK)
565 if (data[0]) /* strlen */
566 LOG_INFO("CMSIS-DAP: FW Version = %s", &data[1]);
571 static int cmsis_dap_get_caps_info(void)
575 /* INFO_ID_CAPS - byte */
576 int retval = cmsis_dap_cmd_DAP_Info(INFO_ID_CAPS, &data);
577 if (retval != ERROR_OK)
581 uint8_t caps = data[1];
583 cmsis_dap_handle->caps = caps;
585 if (caps & INFO_CAPS_SWD)
586 LOG_INFO("CMSIS-DAP: %s", info_caps_str[0]);
587 if (caps & INFO_CAPS_JTAG)
588 LOG_INFO("CMSIS-DAP: %s", info_caps_str[1]);
594 static int cmsis_dap_get_status(void)
598 int retval = cmsis_dap_cmd_DAP_SWJ_Pins(0, 0, 0, &d);
600 if (retval == ERROR_OK) {
601 LOG_INFO("SWCLK/TCK = %d SWDIO/TMS = %d TDI = %d TDO = %d nTRST = %d nRESET = %d",
602 (d & (0x01 << 0)) ? 1 : 0, /* Bit 0: SWCLK/TCK */
603 (d & (0x01 << 1)) ? 1 : 0, /* Bit 1: SWDIO/TMS */
604 (d & (0x01 << 2)) ? 1 : 0, /* Bit 2: TDI */
605 (d & (0x01 << 3)) ? 1 : 0, /* Bit 3: TDO */
606 (d & (0x01 << 5)) ? 1 : 0, /* Bit 5: nTRST */
607 (d & (0x01 << 7)) ? 1 : 0); /* Bit 7: nRESET */
613 static int cmsis_dap_reset_link(void)
615 uint8_t *buffer = cmsis_dap_handle->packet_buffer;
617 LOG_DEBUG("CMSIS-DAP: cmsis_dap_reset_link");
618 LOG_INFO("DAP_SWJ Sequence (reset: 50+ '1' followed by 0)");
620 /* reset line with SWDIO high for >50 cycles */
621 buffer[0] = 0; /* report number */
622 buffer[1] = CMD_DAP_SWJ_SEQ;
631 int retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 10);
633 if (retval != ERROR_OK || buffer[1] != DAP_OK)
636 /* 16bit JTAG-SWD sequence */
637 buffer[0] = 0; /* report number */
638 buffer[1] = CMD_DAP_SWJ_SEQ;
642 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
644 if (retval != ERROR_OK || buffer[1] != DAP_OK)
647 /* another reset just incase */
648 buffer[0] = 0; /* report number */
649 buffer[1] = CMD_DAP_SWJ_SEQ;
658 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 10);
660 if (retval != ERROR_OK || buffer[1] != DAP_OK)
663 /* 16 cycle idle period */
664 buffer[0] = 0; /* report number */
665 buffer[1] = CMD_DAP_SWJ_SEQ;
669 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
671 if (retval != ERROR_OK || buffer[1] != DAP_OK)
674 DEBUG_IO("DAP Read IDCODE");
676 /* read the id code is always the next sequence */
677 buffer[0] = 0; /* report number */
678 buffer[1] = CMD_DAP_TFER;
682 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
684 if (retval != ERROR_OK)
687 if (buffer[1] == 0) {
688 LOG_DEBUG("Result 0x%02" PRIx8 " 0x%02" PRIx8, buffer[1], buffer[2]);
690 LOG_DEBUG("DAP Reset Target");
691 buffer[0] = 0; /* report number */
692 buffer[1] = CMD_DAP_RESET_TARGET;
693 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 2);
694 LOG_DEBUG("Result 0x%02" PRIx8 " 0x%02" PRIx8, buffer[1], buffer[2]);
696 LOG_DEBUG("DAP Write Abort");
697 buffer[0] = 0; /* report number */
698 buffer[1] = CMD_DAP_WRITE_ABORT;
700 buffer[3] = 0x1e/*0x1f*/;
704 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
705 LOG_DEBUG("Result 0x%02" PRIx8, buffer[1]);
707 return 0x80 + buffer[1];
710 LOG_DEBUG("DAP Write Abort");
711 buffer[0] = 0; /* report number */
712 buffer[1] = CMD_DAP_WRITE_ABORT;
718 retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
719 LOG_DEBUG("Result 0x%02" PRIx8, buffer[1]);
724 static int cmsis_dap_swd_open(void)
728 DEBUG_IO("CMSIS-DAP: cmsis_dap_swd_open");
730 if (cmsis_dap_handle == NULL) {
733 retval = cmsis_dap_usb_open();
734 if (retval != ERROR_OK)
737 retval = cmsis_dap_get_caps_info();
738 if (retval != ERROR_OK)
742 if (!(cmsis_dap_handle->caps & INFO_CAPS_SWD)) {
743 LOG_ERROR("CMSIS-DAP: SWD not supported");
744 return ERROR_JTAG_DEVICE_ERROR;
747 retval = cmsis_dap_cmd_DAP_Connect(CONNECT_SWD);
748 if (retval != ERROR_OK)
751 /* Add more setup here.??... */
753 LOG_INFO("CMSIS-DAP: Interface Initialised (SWD)");
757 static int cmsis_dap_init(void)
763 retval = cmsis_dap_swd_open();
764 if (retval != ERROR_OK)
768 if (cmsis_dap_handle == NULL) {
771 retval = cmsis_dap_usb_open();
772 if (retval != ERROR_OK)
775 retval = cmsis_dap_get_caps_info();
776 if (retval != ERROR_OK)
779 /* Connect in JTAG mode */
780 if (!(cmsis_dap_handle->caps & INFO_CAPS_JTAG)) {
781 LOG_ERROR("CMSIS-DAP: JTAG not supported");
782 return ERROR_JTAG_DEVICE_ERROR;
785 retval = cmsis_dap_cmd_DAP_Connect(CONNECT_JTAG);
786 if (retval != ERROR_OK)
789 LOG_INFO("CMSIS-DAP: Interface Initialised (JTAG)");
792 retval = cmsis_dap_get_version_info();
793 if (retval != ERROR_OK)
796 /* INFO_ID_PKT_SZ - short */
797 retval = cmsis_dap_cmd_DAP_Info(INFO_ID_PKT_SZ, &data);
798 if (retval != ERROR_OK)
801 if (data[0] == 2) { /* short */
802 uint16_t pkt_sz = data[1] + (data[2] << 8);
804 if (cmsis_dap_handle->packet_size != pkt_sz + 1) {
805 /* reallocate buffer */
806 cmsis_dap_handle->packet_size = pkt_sz + 1;
807 cmsis_dap_handle->packet_buffer = realloc(cmsis_dap_handle->packet_buffer,
808 cmsis_dap_handle->packet_size);
809 if (cmsis_dap_handle->packet_buffer == NULL) {
810 LOG_ERROR("unable to reallocate memory");
815 LOG_DEBUG("CMSIS-DAP: Packet Size = %" PRId16, pkt_sz);
818 /* INFO_ID_PKT_CNT - byte */
819 retval = cmsis_dap_cmd_DAP_Info(INFO_ID_PKT_CNT, &data);
820 if (retval != ERROR_OK)
823 if (data[0] == 1) { /* byte */
824 uint16_t pkt_cnt = data[1];
825 cmsis_dap_handle->packet_count = pkt_cnt;
826 LOG_DEBUG("CMSIS-DAP: Packet Count = %" PRId16, pkt_cnt);
829 retval = cmsis_dap_get_status();
830 if (retval != ERROR_OK)
833 /* Now try to connect to the target
834 * TODO: This is all SWD only @ present */
835 retval = cmsis_dap_cmd_DAP_SWJ_Clock(100); /* 100kHz */
836 if (retval != ERROR_OK)
839 retval = cmsis_dap_cmd_DAP_TFER_Configure(0, 64, 0);
840 if (retval != ERROR_OK)
842 retval = cmsis_dap_cmd_DAP_SWD_Configure(0x00);
843 if (retval != ERROR_OK)
846 retval = cmsis_dap_cmd_DAP_LED(0x03); /* Both LEDs on */
847 if (retval != ERROR_OK)
850 /* support connecting with srst asserted */
851 enum reset_types jtag_reset_config = jtag_get_reset_config();
853 if (jtag_reset_config & RESET_CNCT_UNDER_SRST) {
854 if (jtag_reset_config & RESET_SRST_NO_GATING) {
855 retval = cmsis_dap_cmd_DAP_SWJ_Pins(0, (1 << 7), 0, NULL);
856 if (retval != ERROR_OK)
858 LOG_INFO("Connecting under reset");
862 retval = cmsis_dap_reset_link();
863 if (retval != ERROR_OK)
866 cmsis_dap_cmd_DAP_LED(0x00); /* Both LEDs off */
868 LOG_INFO("CMSIS-DAP: Interface ready");
873 static int cmsis_dap_swd_init(void)
879 static int cmsis_dap_quit(void)
881 cmsis_dap_cmd_DAP_Disconnect();
882 cmsis_dap_cmd_DAP_LED(0x00); /* Both LEDs off */
884 cmsis_dap_usb_close(cmsis_dap_handle);
889 static void cmsis_dap_execute_reset(struct jtag_command *cmd)
891 int retval = cmsis_dap_cmd_DAP_SWJ_Pins(cmd->cmd.reset->srst ? 0 : (1 << 7), \
893 if (retval != ERROR_OK)
894 LOG_ERROR("CMSIS-DAP: Interface reset failed");
897 static void cmsis_dap_execute_sleep(struct jtag_command *cmd)
900 int retval = cmsis_dap_cmd_DAP_Delay(cmd->cmd.sleep->us);
901 if (retval != ERROR_OK)
903 jtag_sleep(cmd->cmd.sleep->us);
906 static void cmsis_dap_execute_command(struct jtag_command *cmd)
910 cmsis_dap_execute_reset(cmd);
913 cmsis_dap_execute_sleep(cmd);
916 LOG_ERROR("BUG: unknown JTAG command type encountered");
921 static int cmsis_dap_execute_queue(void)
923 struct jtag_command *cmd = jtag_command_queue;
925 while (cmd != NULL) {
926 cmsis_dap_execute_command(cmd);
933 static int cmsis_dap_speed(int speed)
935 if (speed > DAP_MAX_CLOCK) {
936 LOG_INFO("reduce speed request: %dkHz to %dkHz maximum", speed, DAP_MAX_CLOCK);
937 speed = DAP_MAX_CLOCK;
941 LOG_INFO("RTCK not supported");
942 return ERROR_JTAG_NOT_IMPLEMENTED;
945 return cmsis_dap_cmd_DAP_SWJ_Clock(speed);
948 static int cmsis_dap_speed_div(int speed, int *khz)
954 static int cmsis_dap_khz(int khz, int *jtag_speed)
960 COMMAND_HANDLER(cmsis_dap_handle_info_command)
962 if (cmsis_dap_get_version_info() == ERROR_OK)
963 cmsis_dap_get_status();
968 COMMAND_HANDLER(cmsis_dap_handle_vid_pid_command)
970 if (CMD_ARGC > MAX_USB_IDS * 2) {
971 LOG_WARNING("ignoring extra IDs in cmsis_dap_vid_pid "
972 "(maximum is %d pairs)", MAX_USB_IDS);
973 CMD_ARGC = MAX_USB_IDS * 2;
975 if (CMD_ARGC < 2 || (CMD_ARGC & 1)) {
976 LOG_WARNING("incomplete cmsis_dap_vid_pid configuration directive");
978 return ERROR_COMMAND_SYNTAX_ERROR;
979 /* remove the incomplete trailing id */
984 for (i = 0; i < CMD_ARGC; i += 2) {
985 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i], cmsis_dap_vid[i >> 1]);
986 COMMAND_PARSE_NUMBER(u16, CMD_ARGV[i + 1], cmsis_dap_pid[i >> 1]);
990 * Explicitly terminate, in case there are multiples instances of
993 cmsis_dap_vid[i >> 1] = cmsis_dap_pid[i >> 1] = 0;
998 static const struct command_registration cmsis_dap_subcommand_handlers[] = {
1001 .handler = &cmsis_dap_handle_info_command,
1002 .mode = COMMAND_EXEC,
1004 .help = "show cmsis-dap info",
1006 COMMAND_REGISTRATION_DONE
1009 static const struct command_registration cmsis_dap_command_handlers[] = {
1011 .name = "cmsis-dap",
1012 .mode = COMMAND_ANY,
1013 .help = "perform CMSIS-DAP management",
1015 .chain = cmsis_dap_subcommand_handlers,
1018 .name = "cmsis_dap_vid_pid",
1019 .handler = &cmsis_dap_handle_vid_pid_command,
1020 .mode = COMMAND_CONFIG,
1021 .help = "the vendor ID and product ID of the CMSIS-DAP device",
1022 .usage = "(vid pid)* ",
1024 COMMAND_REGISTRATION_DONE
1027 static const struct swd_driver cmsis_dap_swd_driver = {
1028 .init = cmsis_dap_swd_init,
1029 .read_reg = cmsis_dap_swd_read_reg,
1030 .write_reg = cmsis_dap_swd_write_reg,
1031 .run = cmsis_dap_swd_run,
1034 const char *cmsis_dap_transport[] = {"cmsis-dap", NULL};
1036 struct jtag_interface cmsis_dap_interface = {
1037 .name = "cmsis-dap",
1038 .commands = cmsis_dap_command_handlers,
1039 .swd = &cmsis_dap_swd_driver,
1040 .transports = cmsis_dap_transport,
1042 .execute_queue = cmsis_dap_execute_queue,
1043 .speed = cmsis_dap_speed,
1044 .speed_div = cmsis_dap_speed_div,
1045 .khz = cmsis_dap_khz,
1046 .init = cmsis_dap_init,
1047 .quit = cmsis_dap_quit,