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Adiv5: Protect DBG/SYSTEM Power-Up request with timeout too. 

CMSIS-DAP without connected target looped infinite in that situation.
This commit is contained in:
Uwe Bonnes 2020-06-06 18:11:17 +02:00 committed by UweBonnes
parent e35025d214
commit eabd69dcdb
1 changed files with 14 additions and 5 deletions
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19
src/target/adiv5.c
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@ -468,14 +468,25 @@ void adiv5_dp_init(ADIv5_DP_t *dp)
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
}
platform_timeout timeout;
platform_timeout_set(&timeout, 201);
/* Write request for system and debug power up */
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,
ctrlstat |= ADIV5_DP_CTRLSTAT_CSYSPWRUPREQ |
ADIV5_DP_CTRLSTAT_CDBGPWRUPREQ);
/* Wait for acknowledge */
while(((ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT)) &
(ADIV5_DP_CTRLSTAT_CSYSPWRUPACK | ADIV5_DP_CTRLSTAT_CDBGPWRUPACK)) !=
(ADIV5_DP_CTRLSTAT_CSYSPWRUPACK | ADIV5_DP_CTRLSTAT_CDBGPWRUPACK));
while(1) {
ctrlstat = adiv5_dp_read(dp, ADIV5_DP_CTRLSTAT);
uint32_t check = ctrlstat & (ADIV5_DP_CTRLSTAT_CSYSPWRUPACK |
ADIV5_DP_CTRLSTAT_CDBGPWRUPACK);
if (check == (ADIV5_DP_CTRLSTAT_CSYSPWRUPACK |
ADIV5_DP_CTRLSTAT_CDBGPWRUPACK))
break;
if (platform_timeout_is_expired(&timeout)) {
DEBUG_INFO("DEBUG Power-Up failed\n");
return;
}
}
/* This AP reset logic is described in ADIv5, but fails to work
* correctly on STM32. CDBGRSTACK is never asserted, and we
@ -486,8 +497,6 @@ void adiv5_dp_init(ADIv5_DP_t *dp)
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,
ctrlstat |= ADIV5_DP_CTRLSTAT_CDBGRSTREQ);
platform_timeout timeout;
platform_timeout_set(&timeout, 101);
/* Write request for debug reset release */
adiv5_dp_write(dp, ADIV5_DP_CTRLSTAT,
ctrlstat &= ~ADIV5_DP_CTRLSTAT_CDBGRSTREQ);