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-rw-r--r--src/target/arm_adi_v5.c128
1 files changed, 40 insertions, 88 deletions
diff --git a/src/target/arm_adi_v5.c b/src/target/arm_adi_v5.c
index 4eb51f85..039cf87e 100644
--- a/src/target/arm_adi_v5.c
+++ b/src/target/arm_adi_v5.c
@@ -705,7 +705,7 @@ int mem_ap_read_buf_u32_swd(struct adiv5_dap *dap, uint8_t *buffer,
uint8_t* pBuffer = buffer;
int retry, iretry, iiretry; //TC: dirty check to retry whole access before failing.
- int delay=1, maxretry=3; //TC: delay will double with each retry.
+ int maxretry=5; //TC: delay will double with each retry.
for (retry=maxretry;retry;retry--){
@@ -713,108 +713,58 @@ int mem_ap_read_buf_u32_swd(struct adiv5_dap *dap, uint8_t *buffer,
{
// Setup the AP
for (iretry=maxretry;iretry;iretry--){
- //TC: This function does not flush the queue, so we won't get ACK here.
- LOG_INFO("Setting up the AP");
-// retval = dap_setup_accessport(dap, CSW_32BIT | CSW_ADDRINC_SINGLE, address);
+ // Auti-Increment may fail at this point so we don't use it here for now!
retval = dap_setup_accessport(dap, CSW_32BIT, address);
if (retval != ERROR_OK) {
- LOG_ERROR("Setup queue failed!");
+ LOG_ERROR("AP Setup enqueue failed!");
continue;
}
retval = dap_run(dap);
if (retval != ERROR_OK) {
- LOG_ERROR("Setup queue flush failed!");
- alive_sleep(delay);
- delay+=delay;
+ LOG_ERROR("AP Setup queue flush failed!");
continue;
}
-// }
-// if (!iretry) break;
-
- // Initiate memory access by reading the DRW register.
- // Then read the READOK until 1 or max retry.
- // If READOK=1 then read the RDBUFF with our esult.
-// for (iretry=maxretry;iretry;iretry--){
- delay=1;
-// LOG_INFO("Starting read AP_REG_DRW");
-// retval = dap_queue_ap_read(dap, AP_REG_DRW, &invalue);
-// if (retval == ERROR_OK) {
-// LOG_INFO("AP_REG_DRW READ OK");
-// break;
-// }
-// LOG_INFO("Read failed!");
+ // Now as AP is setup we need to read the data.
+ // AP will return WAIT when data not ready, so we need to retry DRW access.
+ // CTRL/STAT{READOK} is set only after ACK=OK so it does not show it AP has finished!!!
+ // According to ARM documentation reading DRW initiates memory access, so
+ // retrying DRW reads would always produce WAIT. Wrong!
+ // We need to read DRW until ACK=OK, this is practical way to read from AP.
+ // After we get OK, we need to chech READOK flag, then read result from RDATA!!!
for (iiretry=maxretry;iiretry;iiretry--){
- LOG_INFO("Starting read AP_REG_DRW");
retval = dap_queue_ap_read(dap, AP_REG_DRW, &invalue);
- if (retval == ERROR_OK) {
- LOG_INFO("AP_REG_DRW READ OK");
-// break;
- }
- LOG_INFO("Read failed!");
+ if (retval == ERROR_OK) break;
- LOG_INFO("Reading out the CTRL/STAT value to check error flags");
retval = dap_queue_dp_read(dap, DP_CTRL_STAT, &ctrlstatval);
- if (ctrlstatval&READOK) {
- LOG_INFO("READOK=1");
- break;
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Cannot read CTRL/STAT!");
+ continue;
}
- alive_sleep(delay);
- delay+=delay;
- LOG_INFO("Writing ABORT");
retval = dap_queue_dp_write(dap, DP_ABORT, 0x00000014);
+ if (retval != ERROR_OK){
+ LOG_ERROR("Cannot enqueue ABORT write");
+ continue;
+ }
retval = dap_run(dap);
- if (retval != ERROR_OK) continue;
- }
- if (ctrlstatval&READOK){
- //Nowe we read the RDBUFF
- LOG_INFO("READOK is set, now read the data result");
- retval = dap_queue_dp_read(dap, DP_RDBUFF, &invalue);
- if (retval == ERROR_OK) break;
- LOG_ERROR("Error reading RDBUFF (after READOK=1).");
- } else {
- LOG_INFO("READOK != 1, read will return invalid data!!!!");
- }
- }
- if (!iretry) {
- LOG_ERROR("READ FAILED!");
- break;
+ if (retval != ERROR_OK) {
+ LOG_ERROR("Cannot flush queued ABORT write");
+ continue;
+ }
+ }
+ // ARM BUG!? Even that we get ACK=OK we need to read the result from RDBUFF.
+ // RESEND will produce bad value. Data returned after ACK=OK is also bad.
+ if (retval == ERROR_OK) {
+ retval = dap_queue_dp_read(dap, DP_CTRL_STAT, &ctrlstatval);
+ if (ctrlstatval&READOK){
+ dap_queue_dp_read(dap, DP_RDBUFF, &invalue);
+ break;
+ }
+ };
}
-
-
-/* uint32_t ctrlstatval=0, abortval=0;
- retval=dap_queue_dp_read(dap, DP_CTRL_STAT, &ctrlstatval);
- if (retval!=ERROR_OK){
- LOG_ERROR("Error in error handling (cannot read CTRL/STAT), transfer failed permanently, I give up :-)");
- return retval;
- }
- LOG_WARNING("ACK!=OK at %d try, delay is %dus, CTRL/STAT=%X, retrying...", maxretry-retry, delay, ctrlstatval);
-
- //TC: According to ADIv5.0 (ARM IHI 0031A):
- // 3.1.1. STICKYERR might be set when debug domain is powered down.
- // 3.1.2. STICKYORUN is set when overrun occurs.
- // 3.1.3. WDATAERR is set on write data parity mismatch.
- // 3.2. pushed compare sets STICKYCMP to 1 if the values match, pushed verify sets STICKYCMP to 1 if the values do not match.
-
- abortval=0;
- abortval|=(ctrlstatval&STICKYORUN)?ORUNERRCLR:0;
- abortval|=(ctrlstatval&STICKYERR)?STKERRCLR:0;
- abortval|=(ctrlstatval&STICKYCMP)?STKCMPCLR:0;
- LOG_WARNING("CTRL/STAT=0x%X, writing 0x%X to ABORT register (clearing sticky error flags)", ctrlstatval, abortval);
- retval=dap_queue_dp_write(dap, DP_ABORT, abortval);
- if (retval!=ERROR_OK) return retval;
- retval=dap_run(dap);
- if (retval!=ERROR_OK) return retval;
- //Now verify is error flags are cleared
- retval=dap_queue_dp_read(dap, DP_CTRL_STAT, &ctrlstatval);
- if (retval!=ERROR_OK) return retval;
- retval=dap_run(dap);
- if (retval!=ERROR_OK) return retval;
- LOG_WARNING("After clearing error flags CTRL/STAT=0x%X", ctrlstatval);
- alive_sleep(delay);
- delay*=2;
+ if (!iretry && !iiretry) {
+ LOG_ERROR("MEM-AP READ FAILED, RETRYING...");
break;
}
-*/
LOG_INFO("COUNT=%d, ADDR=%X, BUFF=%x", count, address, invalue);
if (address & 0x3u)
@@ -834,9 +784,14 @@ int mem_ap_read_buf_u32_swd(struct adiv5_dap *dap, uint8_t *buffer,
buffer += 4;
}
count -= 4;
+
}
if (count<=0) break;
}
+ if (!retry){
+ LOG_ERROR("MEM-AP READ FAILED AFTER %d RETRIES...", maxretry);
+ return ERROR_FAIL;
+ }
// if we have an unaligned access - reorder data
if (adr & 0x3u)
@@ -855,7 +810,6 @@ int mem_ap_read_buf_u32_swd(struct adiv5_dap *dap, uint8_t *buffer,
}
}
}
-// if (retry) return ERROR_OK;
return ERROR_OK;
}
@@ -1267,7 +1221,6 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
return retval;
if ((retval = dap_run(dap)) != ERROR_OK)
return retval;
- alive_sleep(10);
}
// Wait for Debug Unit powerup to complete.
@@ -1279,7 +1232,6 @@ int ahbap_debugport_init(struct adiv5_dap *dap)
return retval;
if ((retval = dap_run(dap)) != ERROR_OK)
return retval;
- alive_sleep(10);
}
/* // wait for debug unit reset to complete.
generated by cgit v1.2.3 (git 2.46.0) at 2024-12-31 20:04:04 +0000