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adiv5: Try abort sequence if DP is stalling during scan.

This commit is contained in:
Gareth McMullin 2016-04-19 22:03:52 -07:00
parent bed6627579
commit 08c9ab54d7
1 changed files with 16 additions and 2 deletions
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18
src/adiv5.c
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@ -26,6 +26,7 @@
#include "gdb_packet.h"
#include "adiv5.h"
#include "cortexm.h"
#include "exception.h"
#ifndef DO_RESET_SEQ
#define DO_RESET_SEQ 0
@ -157,6 +158,11 @@ ADIv5_AP_t *adiv5_new_ap(ADIv5_DP_t *dp, uint8_t apsel)
ap->csw = adiv5_ap_read(ap, ADIV5_AP_CSW) &
~(ADIV5_AP_CSW_SIZE_MASK | ADIV5_AP_CSW_ADDRINC_MASK);
if (ap->csw & ADIV5_AP_CSW_TRINPROG) {
gdb_out("AP transaction in progress. Target may not be usable.\n");
ap->csw &= ~ADIV5_AP_CSW_TRINPROG;
}
DEBUG("%3d: IDR=%08X CFG=%08X BASE=%08X CSW=%08X\n",
apsel, ap->idr, ap->cfg, ap->base, ap->csw);
@ -166,11 +172,19 @@ ADIv5_AP_t *adiv5_new_ap(ADIv5_DP_t *dp, uint8_t apsel)
void adiv5_dp_init(ADIv5_DP_t *dp)
{
uint32_t ctrlstat;
uint32_t ctrlstat = 0;
adiv5_dp_ref(dp);
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
volatile struct exception e;
TRY_CATCH (e, EXCEPTION_TIMEOUT) {
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
}
if (e.type) {
gdb_out("DP not responding! Trying abort sequence...\n");
adiv5_dp_abort(dp, ADIV5_DP_ABORT_DAPABORT);
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
}
/* Write request for system and debug power up */
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,