/***************************************************************************
+ * Copyright (C) 2014 by Paul Fertser *
+ * fercerpav@gmail.com *
+ * *
* Copyright (C) 2013 by mike brown *
* mike@theshedworks.org.uk *
* *
#include <hidapi.h>
-#ifdef _DEBUG_JTAG_IO_
- #define DEBUG_IO(expr...) LOG_DEBUG(expr)
-#else
- #define DEBUG_IO(expr...) do {} while (0)
-#endif
-
/*
* See CMSIS-DAP documentation:
* Version 0.01 - Beta.
uint8_t mode;
};
+struct pending_transfer_result {
+ uint8_t cmd;
+ uint32_t data;
+ void *buffer;
+};
+
+static int pending_transfer_count, pending_queue_len;
+static struct pending_transfer_result *pending_transfers;
+
+static int queued_retval;
+
static struct cmsis_dap *cmsis_dap_handle;
static int cmsis_dap_usb_open(void)
int packet_size = PACKET_SIZE;
/* atmel cmsis-dap uses 512 byte reports */
+ /* TODO: HID report descriptor should be parsed instead of
+ * hardcoding a match by VID */
if (target_vid == 0x03eb)
packet_size = 512 + 1;
hid_close(dap->dev_handle);
hid_exit();
- if (cmsis_dap_handle->packet_buffer)
- free(cmsis_dap_handle->packet_buffer);
-
- if (cmsis_dap_handle) {
- free(cmsis_dap_handle);
- cmsis_dap_handle = NULL;
- }
-
- if (cmsis_dap_serial) {
- free(cmsis_dap_serial);
- cmsis_dap_serial = NULL;
- }
+ free(cmsis_dap_handle->packet_buffer);
+ free(cmsis_dap_handle);
+ cmsis_dap_handle = NULL;
+ free(cmsis_dap_serial);
+ cmsis_dap_serial = NULL;
+ free(pending_transfers);
+ pending_transfers = NULL;
return;
}
static int cmsis_dap_usb_xfer(struct cmsis_dap *dap, int txlen)
{
/* Pad the rest of the TX buffer with 0's */
- memset(dap->packet_buffer + txlen, 0, dap->packet_size - 1 - txlen);
+ memset(dap->packet_buffer + txlen, 0, dap->packet_size - txlen);
/* write data to device */
int retval = hid_write(dap->dev_handle, dap->packet_buffer, dap->packet_size);
return ERROR_OK;
}
-static int cmsis_dap_cmd_DAP_TFER_Configure(uint8_t idle, uint16_t delay, uint16_t retry)
+static int cmsis_dap_cmd_DAP_TFER_Configure(uint8_t idle, uint16_t retry_count, uint16_t match_retry)
{
int retval;
uint8_t *buffer = cmsis_dap_handle->packet_buffer;
buffer[0] = 0; /* report number */
buffer[1] = CMD_DAP_TFER_CONFIGURE;
buffer[2] = idle;
- buffer[3] = delay & 0xff;
- buffer[4] = (delay >> 8) & 0xff;
- buffer[5] = retry & 0xff;
- buffer[6] = (retry >> 8) & 0xff;
+ buffer[3] = retry_count & 0xff;
+ buffer[4] = (retry_count >> 8) & 0xff;
+ buffer[5] = match_retry & 0xff;
+ buffer[6] = (match_retry >> 8) & 0xff;
retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
if (retval != ERROR_OK || buffer[1] != DAP_OK) {
}
#endif
-static int queued_retval;
-
-static void cmsis_dap_swd_read_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t *value)
+static int cmsis_dap_swd_run_queue(struct adiv5_dap *dap)
{
- if (queued_retval != ERROR_OK)
- return;
-
uint8_t *buffer = cmsis_dap_handle->packet_buffer;
- int retval;
- uint32_t val;
- DEBUG_IO("CMSIS-DAP: Read Reg 0x%02" PRIx8, cmd);
+ LOG_DEBUG("Executing %d queued transactions", pending_transfer_count);
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_TFER;
- buffer[2] = 0x00;
- buffer[3] = 0x01;
- buffer[4] = cmd;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
-
- /* TODO - need better response checking */
- if (retval != ERROR_OK || buffer[1] != 0x01) {
- LOG_ERROR("CMSIS-DAP: Read Error (0x%02" PRIx8 ")", buffer[2]);
- queued_retval = buffer[2];
- return;
+ if (queued_retval != ERROR_OK) {
+ LOG_DEBUG("Skipping due to previous errors: %d", queued_retval);
+ goto skip;
+ }
+
+ if (!pending_transfer_count)
+ goto skip;
+
+ size_t idx = 0;
+ buffer[idx++] = 0; /* report number */
+ buffer[idx++] = CMD_DAP_TFER;
+ buffer[idx++] = 0x00; /* DAP Index */
+ buffer[idx++] = pending_transfer_count;
+
+ for (int i = 0; i < pending_transfer_count; i++) {
+ uint8_t cmd = pending_transfers[i].cmd;
+ uint32_t data = pending_transfers[i].data;
+
+ LOG_DEBUG("%s %s reg %x %"PRIx32,
+ cmd & SWD_CMD_APnDP ? "AP" : "DP",
+ cmd & SWD_CMD_RnW ? "read" : "write",
+ (cmd & SWD_CMD_A32) >> 1, data);
+
+ /* When proper WAIT handling is implemented in the
+ * common SWD framework, this kludge can be
+ * removed. However, this might lead to minor
+ * performance degradation as the adapter wouldn't be
+ * able to automatically retry anything (because ARM
+ * has forgotten to implement sticky error flags
+ * clearing). See also comments regarding
+ * cmsis_dap_cmd_DAP_TFER_Configure() and
+ * cmsis_dap_cmd_DAP_SWD_Configure() in
+ * cmsis_dap_init().
+ */
+ if (!(cmd & SWD_CMD_RnW) &&
+ !(cmd & SWD_CMD_APnDP) &&
+ (cmd & SWD_CMD_A32) >> 1 == DP_CTRL_STAT &&
+ (data & CORUNDETECT)) {
+ LOG_DEBUG("refusing to enable sticky overrun detection");
+ data &= ~CORUNDETECT;
+ }
+
+ buffer[idx++] = (cmd >> 1) & 0x0f;
+ if (!(cmd & SWD_CMD_RnW)) {
+ buffer[idx++] = (data) & 0xff;
+ buffer[idx++] = (data >> 8) & 0xff;
+ buffer[idx++] = (data >> 16) & 0xff;
+ buffer[idx++] = (data >> 24) & 0xff;
+ }
+ }
+
+ queued_retval = cmsis_dap_usb_xfer(cmsis_dap_handle, idx);
+ if (queued_retval != ERROR_OK)
+ goto skip;
+
+ idx = 2;
+ uint8_t ack = buffer[idx] & 0x07;
+ if (ack != SWD_ACK_OK || (buffer[idx] & 0x08)) {
+ LOG_DEBUG("SWD ack not OK: %d %s", buffer[idx-1],
+ ack == SWD_ACK_WAIT ? "WAIT" : ack == SWD_ACK_FAULT ? "FAULT" : "JUNK");
+ queued_retval = ack == SWD_ACK_WAIT ? ERROR_WAIT : ERROR_FAIL;
+ goto skip;
}
+ idx++;
+
+ if (pending_transfer_count != buffer[1])
+ LOG_ERROR("CMSIS-DAP transfer count mismatch: expected %d, got %d",
+ pending_transfer_count, buffer[1]);
+
+ for (int i = 0; i < buffer[1]; i++) {
+ if (pending_transfers[i].cmd & SWD_CMD_RnW) {
+ static uint32_t last_read;
+ uint32_t data = le_to_h_u32(&buffer[idx]);
+ uint32_t tmp = data;
+ idx += 4;
+
+ LOG_DEBUG("Read result: %"PRIx32, data);
+
+ /* Imitate posted AP reads */
+ if ((pending_transfers[i].cmd & SWD_CMD_APnDP) ||
+ ((pending_transfers[i].cmd & SWD_CMD_A32) >> 1 == DP_RDBUFF)) {
+ tmp = last_read;
+ last_read = data;
+ }
- val = le_to_h_u32(&buffer[3]);
- DEBUG_IO("0x%08" PRIx32, val);
+ if (pending_transfers[i].buffer)
+ *(uint32_t *)pending_transfers[i].buffer = tmp;
+ }
+ }
- if (value)
- *value = val;
+skip:
+ pending_transfer_count = 0;
+ int retval = queued_retval;
+ queued_retval = ERROR_OK;
- queued_retval = retval;
+ return retval;
}
-static void cmsis_dap_swd_write_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t value)
+static void cmsis_dap_swd_queue_cmd(struct adiv5_dap *dap, uint8_t cmd, uint32_t *dst, uint32_t data)
{
+ if (pending_transfer_count == pending_queue_len) {
+ /* Not enough room in the queue. Run the queue. */
+ queued_retval = cmsis_dap_swd_run_queue(dap);
+ }
+
if (queued_retval != ERROR_OK)
return;
- uint8_t *buffer = cmsis_dap_handle->packet_buffer;
-
- DEBUG_IO("CMSIS-DAP: Write Reg 0x%02" PRIx8 " 0x%08" PRIx32, cmd, value);
-
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_TFER;
- buffer[2] = 0x00;
- buffer[3] = 0x01;
- buffer[4] = cmd;
- buffer[5] = (value) & 0xff;
- buffer[6] = (value >> 8) & 0xff;
- buffer[7] = (value >> 16) & 0xff;
- buffer[8] = (value >> 24) & 0xff;
- int retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 9);
-
- if (buffer[1] != 0x01) {
- LOG_ERROR("CMSIS-DAP: Write Error (0x%02" PRIx8 ")", buffer[2]);
- retval = buffer[2];
+ pending_transfers[pending_transfer_count].data = data;
+ pending_transfers[pending_transfer_count].cmd = cmd;
+ if (cmd & SWD_CMD_RnW) {
+ /* Queue a read transaction */
+ pending_transfers[pending_transfer_count].buffer = dst;
}
+ pending_transfer_count++;
+}
- queued_retval = retval;
+static void cmsis_dap_swd_write_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t value)
+{
+ assert(!(cmd & SWD_CMD_RnW));
+ cmsis_dap_swd_queue_cmd(dap, cmd, NULL, value);
}
-static int cmsis_dap_swd_run(struct adiv5_dap *dap)
+static void cmsis_dap_swd_read_reg(struct adiv5_dap *dap, uint8_t cmd, uint32_t *value)
{
- int retval = queued_retval;
- queued_retval = ERROR_OK;
- return retval;
+ assert(cmd & SWD_CMD_RnW);
+ cmsis_dap_swd_queue_cmd(dap, cmd, value, 0);
}
static int cmsis_dap_get_version_info(void)
return retval;
}
-static int cmsis_dap_reset_link(void)
+static int cmsis_dap_swd_switch_seq(struct adiv5_dap *dap, enum swd_special_seq seq)
{
uint8_t *buffer = cmsis_dap_handle->packet_buffer;
+ const uint8_t *s;
+ unsigned int s_len;
+ int retval;
- LOG_DEBUG("CMSIS-DAP: cmsis_dap_reset_link");
- LOG_INFO("DAP_SWJ Sequence (reset: 50+ '1' followed by 0)");
-
- /* reset line with SWDIO high for >50 cycles */
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_SWJ_SEQ;
- buffer[2] = 7 * 8;
- buffer[3] = 0xff;
- buffer[4] = 0xff;
- buffer[5] = 0xff;
- buffer[6] = 0xff;
- buffer[7] = 0xff;
- buffer[8] = 0xff;
- buffer[9] = 0xff;
- int retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 10);
-
- if (retval != ERROR_OK || buffer[1] != DAP_OK)
- return ERROR_FAIL;
-
- /* 16bit JTAG-SWD sequence */
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_SWJ_SEQ;
- buffer[2] = 2 * 8;
- buffer[3] = 0x9e;
- buffer[4] = 0xe7;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
+ /* When we are reconnecting, DAP_Connect needs to be rerun, at
+ * least on Keil ULINK-ME */
+ retval = cmsis_dap_cmd_DAP_Connect(seq == LINE_RESET || seq == JTAG_TO_SWD ?
+ CONNECT_SWD : CONNECT_JTAG);
+ if (retval != ERROR_OK)
+ return retval;
- if (retval != ERROR_OK || buffer[1] != DAP_OK)
+ switch (seq) {
+ case LINE_RESET:
+ LOG_DEBUG("SWD line reset");
+ s = swd_seq_line_reset;
+ s_len = swd_seq_line_reset_len;
+ break;
+ case JTAG_TO_SWD:
+ LOG_DEBUG("JTAG-to-SWD");
+ s = swd_seq_jtag_to_swd;
+ s_len = swd_seq_jtag_to_swd_len;
+ break;
+ case SWD_TO_JTAG:
+ LOG_DEBUG("SWD-to-JTAG");
+ s = swd_seq_swd_to_jtag;
+ s_len = swd_seq_swd_to_jtag_len;
+ break;
+ default:
+ LOG_ERROR("Sequence %d not supported", seq);
return ERROR_FAIL;
+ }
- /* another reset just incase */
buffer[0] = 0; /* report number */
buffer[1] = CMD_DAP_SWJ_SEQ;
- buffer[2] = 7 * 8;
- buffer[3] = 0xff;
- buffer[4] = 0xff;
- buffer[5] = 0xff;
- buffer[6] = 0xff;
- buffer[7] = 0xff;
- buffer[8] = 0xff;
- buffer[9] = 0xff;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 10);
-
- if (retval != ERROR_OK || buffer[1] != DAP_OK)
- return ERROR_FAIL;
+ buffer[2] = s_len;
+ bit_copy(&buffer[3], 0, s, 0, s_len);
- /* 16 cycle idle period */
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_SWJ_SEQ;
- buffer[2] = 2 * 8;
- buffer[3] = 0x00;
- buffer[4] = 0x00;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
+ retval = cmsis_dap_usb_xfer(cmsis_dap_handle, DIV_ROUND_UP(s_len, 8) + 3);
if (retval != ERROR_OK || buffer[1] != DAP_OK)
return ERROR_FAIL;
- DEBUG_IO("DAP Read IDCODE");
-
- /* read the id code is always the next sequence */
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_TFER;
- buffer[2] = 0x00;
- buffer[3] = 0x01;
- buffer[4] = 0x02;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 5);
-
- if (retval != ERROR_OK)
- return retval;
-
- if (buffer[1] == 0) {
- LOG_DEBUG("Result 0x%02" PRIx8 " 0x%02" PRIx8, buffer[1], buffer[2]);
-
- LOG_DEBUG("DAP Reset Target");
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_RESET_TARGET;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 2);
- LOG_DEBUG("Result 0x%02" PRIx8 " 0x%02" PRIx8, buffer[1], buffer[2]);
-
- LOG_DEBUG("DAP Write Abort");
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_WRITE_ABORT;
- buffer[2] = 0x00;
- buffer[3] = 0x1e/*0x1f*/;
- buffer[4] = 0x00;
- buffer[5] = 0x00;
- buffer[6] = 0x00;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
- LOG_DEBUG("Result 0x%02" PRIx8, buffer[1]);
-
- return 0x80 + buffer[1];
- }
-
- LOG_DEBUG("DAP Write Abort");
- buffer[0] = 0; /* report number */
- buffer[1] = CMD_DAP_WRITE_ABORT;
- buffer[2] = 0x00;
- buffer[3] = 0x1e;
- buffer[4] = 0x00;
- buffer[5] = 0x00;
- buffer[6] = 0x00;
- retval = cmsis_dap_usb_xfer(cmsis_dap_handle, 7);
- LOG_DEBUG("Result 0x%02" PRIx8, buffer[1]);
-
- return retval;
+ return ERROR_OK;
}
static int cmsis_dap_swd_open(void)
{
int retval;
- DEBUG_IO("CMSIS-DAP: cmsis_dap_swd_open");
-
if (cmsis_dap_handle == NULL) {
-
/* SWD init */
retval = cmsis_dap_usb_open();
if (retval != ERROR_OK)
if (data[0] == 2) { /* short */
uint16_t pkt_sz = data[1] + (data[2] << 8);
+ /* 4 bytes of command header + 5 bytes per register
+ * write. For bulk read sequences just 4 bytes are
+ * needed per transfer, so this is suboptimal. */
+ pending_queue_len = (pkt_sz - 4) / 5;
+ pending_transfers = malloc(pending_queue_len * sizeof(*pending_transfers));
+ if (!pending_transfers) {
+ LOG_ERROR("Unable to allocate memory for CMSIS-DAP queue");
+ return ERROR_FAIL;
+ }
+
if (cmsis_dap_handle->packet_size != pkt_sz + 1) {
/* reallocate buffer */
cmsis_dap_handle->packet_size = pkt_sz + 1;
/* Now try to connect to the target
* TODO: This is all SWD only @ present */
- retval = cmsis_dap_cmd_DAP_SWJ_Clock(100); /* 100kHz */
+ retval = cmsis_dap_cmd_DAP_SWJ_Clock(jtag_get_speed_khz());
if (retval != ERROR_OK)
return ERROR_FAIL;
+ /* Ask CMSIS-DAP to automatically retry on receiving WAIT for
+ * up to 64 times. This must be changed to 0 if sticky
+ * overrun detection is enabled. */
retval = cmsis_dap_cmd_DAP_TFER_Configure(0, 64, 0);
if (retval != ERROR_OK)
return ERROR_FAIL;
- retval = cmsis_dap_cmd_DAP_SWD_Configure(0x00);
+ /* Data Phase (bit 2) must be set to 1 if sticky overrun
+ * detection is enabled */
+ retval = cmsis_dap_cmd_DAP_SWD_Configure(0); /* 1 TRN, no Data Phase */
if (retval != ERROR_OK)
return ERROR_FAIL;
}
}
- retval = cmsis_dap_reset_link();
- if (retval != ERROR_OK)
- return ERROR_FAIL;
-
- cmsis_dap_cmd_DAP_LED(0x00); /* Both LEDs off */
+ cmsis_dap_cmd_DAP_LED(0x00); /* Both LEDs off */
LOG_INFO("CMSIS-DAP: Interface ready");
return ERROR_OK;
}
+static int_least32_t cmsis_dap_swd_frequency(struct adiv5_dap *dap, int_least32_t hz)
+{
+ if (hz > 0)
+ cmsis_dap_speed(hz / 1000);
+
+ return hz;
+}
+
COMMAND_HANDLER(cmsis_dap_handle_info_command)
{
if (cmsis_dap_get_version_info() == ERROR_OK)
static const struct swd_driver cmsis_dap_swd_driver = {
.init = cmsis_dap_swd_init,
+ .frequency = cmsis_dap_swd_frequency,
+ .switch_seq = cmsis_dap_swd_switch_seq,
.read_reg = cmsis_dap_swd_read_reg,
.write_reg = cmsis_dap_swd_write_reg,
- .run = cmsis_dap_swd_run,
+ .run = cmsis_dap_swd_run_queue,
};
-const char *cmsis_dap_transport[] = {"cmsis-dap", NULL};
+static const char * const cmsis_dap_transport[] = { "swd", NULL };
struct jtag_interface cmsis_dap_interface = {
.name = "cmsis-dap",
+++ /dev/null
-/***************************************************************************
- * Copyright (C) 2013 by mike brown *
- * mike@theshedworks.org.uk *
- * *
- * Copyright (C) 2013 by Spencer Oliver *
- * spen@spen-soft.co.uk *
- * *
- * 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., *
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
- ***************************************************************************/
-
-/**
- * @file
- * Utilities to support ARM "CMSIS-DAP", The CoreSight Debug Access Port.
- * This is coupled to recent versions of ARM's "CoreSight" debug framework.
- * This specific code is a transport level interface, with
- * "target/arm_adi_v5.[hc]" code understanding operation semantics,
- * shared with the SWD & JTAG transports.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "arm.h"
-#include "arm_adi_v5.h"
-#include <helper/time_support.h>
-
-#include <transport/transport.h>
-#include <jtag/interface.h>
-
-#include <jtag/swd.h>
-
-#define CMSIS_CMD_DP (0 << 0) /* set only for AP access */
-#define CMSIS_CMD_AP (1 << 0) /* set only for AP access */
-#define CMSIS_CMD_READ (1 << 1) /* set only for read access */
-#define CMSIS_CMD_WRITE (0 << 1) /* set only for read access */
-#define CMSIS_CMD_A32(n) ((n)&0x0C) /* bits A[3:2] of register addr */
-#define CMSIS_CMD_VAL_MATCH (1 << 4) /* Value Match */
-#define CMSIS_CMD_MATCH_MSK (1 << 5) /* Match Mask */
-
-/* YUK! - but this is currently a global.... */
-extern struct jtag_interface *jtag_interface;
-
-static int cmsis_dap_clear_sticky_errors(struct adiv5_dap *dap)
-{
- LOG_DEBUG(" ");
-
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
- swd->write_reg(dap, (CMSIS_CMD_DP | CMSIS_CMD_WRITE | CMSIS_CMD_A32(DP_ABORT)),
- STKCMPCLR | STKERRCLR | WDERRCLR | ORUNERRCLR);
- return ERROR_OK;
-}
-
-static int cmsis_dap_queue_ap_abort(struct adiv5_dap *dap, uint8_t *ack)
-{
- LOG_DEBUG(" ");
-
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
- swd->write_reg(dap, (CMSIS_CMD_DP | CMSIS_CMD_WRITE | CMSIS_CMD_A32(DP_ABORT)),
- DAPABORT | STKCMPCLR | STKERRCLR | WDERRCLR | ORUNERRCLR);
- return ERROR_OK;
-}
-
-static int cmsis_dap_queue_dp_read(struct adiv5_dap *dap, unsigned reg, uint32_t *data)
-{
- LOG_DEBUG("reg = %d", reg);
-
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
- swd->read_reg(dap, (CMSIS_CMD_DP | CMSIS_CMD_READ | CMSIS_CMD_A32(reg)), data);
- return ERROR_OK;
-}
-
-static int (cmsis_dap_queue_dp_write)(struct adiv5_dap *dap, unsigned reg, uint32_t data)
-{
- LOG_DEBUG("reg = %d, data = 0x%08" PRIx32, reg, data);
-
- /* setting the ORUNDETECT bit causes issues for some targets,
- * disable until we find out why */
- if (reg == DP_CTRL_STAT) {
- LOG_DEBUG("disabling overrun detection");
- data &= ~CORUNDETECT;
- }
-
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
- swd->write_reg(dap, (CMSIS_CMD_DP | CMSIS_CMD_WRITE | CMSIS_CMD_A32(reg)), data);
- return ERROR_OK;
-}
-
-/** Select the AP register bank matching bits 7:4 of reg. */
-static int cmsis_dap_ap_q_bankselect(struct adiv5_dap *dap, unsigned reg)
-{
- uint32_t select_ap_bank = reg & 0x000000F0;
-
- if (select_ap_bank == dap->ap_bank_value)
- return ERROR_OK;
-
- dap->ap_bank_value = select_ap_bank;
- select_ap_bank |= dap->ap_current;
-
- cmsis_dap_queue_dp_write(dap, DP_SELECT, select_ap_bank);
- return ERROR_OK;
-}
-
-static int (cmsis_dap_queue_ap_read)(struct adiv5_dap *dap, unsigned reg, uint32_t *data)
-{
- cmsis_dap_ap_q_bankselect(dap, reg);
-
- LOG_DEBUG("reg = %d", reg);
-
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
- swd->read_reg(dap, (CMSIS_CMD_AP | CMSIS_CMD_READ | CMSIS_CMD_A32(reg)), data);
-
- return ERROR_OK;
-}
-
-static int (cmsis_dap_queue_ap_write)(struct adiv5_dap *dap, unsigned reg, uint32_t data)
-{
- /* TODO: CSW_DBGSWENABLE (bit31) causes issues for some targets
- * disable until we find out why */
- if (reg == AP_REG_CSW)
- data &= ~CSW_DBGSWENABLE;
-
- cmsis_dap_ap_q_bankselect(dap, reg);
-
- LOG_DEBUG("reg = %d, data = 0x%08" PRIx32, reg, data);
-
- const struct swd_driver *swd = jtag_interface->swd;
- assert(swd);
-
- swd->write_reg(dap, (CMSIS_CMD_AP | CMSIS_CMD_WRITE | CMSIS_CMD_A32(reg)), data);
-
- return ERROR_OK;
-}
-
-/** Executes all queued DAP operations. */
-static int cmsis_dap_run(struct adiv5_dap *dap)
-{
- LOG_DEBUG(" ");
- /*
- Some debug dongles do more than asked for(e.g. EDBG from
- Atmel) behind the scene and issuing an AP write
- may result in more than just APACC SWD transaction, which in
- turn can possibly set sticky error bit in CTRL/STAT register
- of the DP(an example would be writing SYSRESETREQ to AIRCR).
- Such adapters may interpret CMSIS-DAP secification
- differently and not guarantee to be report those failures
- via status byte of the return USB packet from CMSIS-DAP, so
- we need to check CTRL/STAT and if that happens to clear it.
- Note that once the CMSIS-DAP SWD implementation starts queueing
- transfers this will cause loss of the transfers after the
- failed one. At least a warning is printed.
- */
- uint32_t ctrlstat;
- cmsis_dap_queue_dp_read(dap, DP_CTRL_STAT, &ctrlstat);
-
- int retval = jtag_interface->swd->run(dap);
-
- if (retval == ERROR_OK && (ctrlstat & SSTICKYERR))
- LOG_WARNING("Adapter returned success despite SSTICKYERR being set.");
-
- if (retval != ERROR_OK || (ctrlstat & SSTICKYERR))
- cmsis_dap_clear_sticky_errors(dap);
-
- return retval;
-}
-
-const struct dap_ops cmsis_dap_ops = {
- .is_swd = true,
- .queue_dp_read = cmsis_dap_queue_dp_read,
- .queue_dp_write = cmsis_dap_queue_dp_write,
- .queue_ap_read = cmsis_dap_queue_ap_read,
- .queue_ap_write = cmsis_dap_queue_ap_write,
- .queue_ap_abort = cmsis_dap_queue_ap_abort,
- .run = cmsis_dap_run,
-};
-
-static const struct command_registration cmsis_dap_commands[] = {
- {
- /*
- * Set up SWD and JTAG targets identically, unless/until
- * infrastructure improves ... meanwhile, ignore all
- * JTAG-specific stuff like IR length for SWD.
- *
- * REVISIT can we verify "just one SWD DAP" here/early?
- */
- .name = "newdap",
- .jim_handler = jim_jtag_newtap,
- .mode = COMMAND_CONFIG,
- .help = "declare a new CMSIS-DAP"
- },
- COMMAND_REGISTRATION_DONE
-};
-
-static const struct command_registration cmsis_dap_handlers[] = {
- {
- .name = "cmsis-dap",
- .mode = COMMAND_ANY,
- .help = "cmsis_dap command group",
- .chain = cmsis_dap_commands,
- },
- COMMAND_REGISTRATION_DONE
-};
-
-static int cmsis_dap_select(struct command_context *ctx)
-{
- LOG_DEBUG("CMSIS-ADI: cmsis_dap_select");
-
- int retval = register_commands(ctx, NULL, cmsis_dap_handlers);
-
- if (retval != ERROR_OK)
- return retval;
-
- /* FIXME: This needs a real overhaul!! FIXME
- * be sure driver is in SWD mode; start
- * with hardware default TRN (1), it can be changed later
- * we use a bogus 'swd' driver to implement cmsis-dap as it is quite similar */
-
- const struct swd_driver *swd = jtag_interface->swd;
- if (!swd || !swd->read_reg || !swd->write_reg || !swd->init) {
- LOG_ERROR("no SWD driver?");
- return ERROR_FAIL;
- }
-
- retval = swd->init();
- if (retval != ERROR_OK) {
- LOG_ERROR("unable to init CMSIS-DAP driver");
- return retval;
- }
-
- return retval;
-}
-
-static int cmsis_dap_init(struct command_context *ctx)
-{
- struct target *target = get_current_target(ctx);
- struct arm *arm = target_to_arm(target);
- struct adiv5_dap *dap = arm->dap;
- uint32_t idcode;
- int status;
-
- LOG_DEBUG("CMSIS-ADI init");
-
- /* Force the DAP's ops vector for CMSIS-DAP mode.
- * messy - is there a better way? */
- arm->dap->ops = &cmsis_dap_ops;
-
- /* FIXME validate transport config ... is the
- * configured DAP present (check IDCODE)?
- * Is *only* one DAP configured?
- *
- * MUST READ IDCODE
- */
-
- /* Note, debugport_init() does setup too */
-
-#if 0
- const struct swd_driver *swd = jtag_interface->swd;
- if (!swd || !swd->read_reg || !swd->write_reg || !swd->init) {
- LOG_ERROR("no SWD driver?");
- return ERROR_FAIL;
- }
-
- int retval = swd->init(1);
- if (retval != ERROR_OK) {
- LOG_ERROR("unable to init CMSIS-DAP driver");
- return retval;
- }
-#endif
-
- status = cmsis_dap_queue_dp_read(dap, DP_IDCODE, &idcode);
-
- if (status == ERROR_OK)
- LOG_INFO("IDCODE 0x%08" PRIx32, idcode);
-
- /* force clear all sticky faults */
- cmsis_dap_clear_sticky_errors(dap);
-
- /* this is a workaround to get polling working */
- jtag_add_reset(0, 0);
-
- return status;
-}
-
-static struct transport cmsis_dap_transport = {
- .name = "cmsis-dap",
- .select = cmsis_dap_select,
- .init = cmsis_dap_init,
-};
-
-static void cmsis_dap_constructor(void) __attribute__((constructor));
-static void cmsis_dap_constructor(void)
-{
- transport_register(&cmsis_dap_transport);
-}
-
-/** Returns true if the current debug session
- * is using CMSIS-DAP as its transport.
- */
-bool transport_is_cmsis_dap(void)
-{
- return get_current_transport() == &cmsis_dap_transport;
-}
projects / openocd / commitdiff