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adi_v5: search for Debug and Memory AP support

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Adds dap_find_ap() function.

Change-Id: I6643025624009b12d4936de67a605da52c07be49
Signed-off-by: Evan Hunter <ehunter@broadcom.com>
Reviewed-on: http://openocd.zylin.com/909
Tested-by: jenkins
Reviewed-by: Spencer Oliver <spen@spen-soft.co.uk>
This commit is contained in:
Evan Hunter
2012-10-12 09:07:45 +11:00
committed by Spencer Oliver
parent 927e53f8d5
commit 4e47519f6c
4 changed files with 134 additions and 56 deletions
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54
src/target/arm_adi_v5.c
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@@ -1221,6 +1221,60 @@ static bool is_dap_cid_ok(uint32_t cid3, uint32_t cid2, uint32_t cid1, uint32_t
&& ((cid1 & 0x0f) == 0) && cid0 == 0x0d;
}
/*
* This function checks the ID for each access port to find the requested Access Port type
*/
int dap_find_ap(struct adiv5_dap *dap, enum ap_type type_to_find, uint8_t *ap_num_out)
{
int ap;
/* Maximum AP number is 255 since the SELECT register is 8 bits */
for (ap = 0; ap <= 255; ap++) {
/* read the IDR register of the Access Port */
uint32_t id_val = 0;
dap_ap_select(dap, ap);
int retval = dap_queue_ap_read(dap, AP_REG_IDR, &id_val);
if (retval != ERROR_OK)
return retval;
retval = dap_run(dap);
/* IDR bits:
* 31-28 : Revision
* 27-24 : JEDEC bank (0x4 for ARM)
* 23-17 : JEDEC code (0x3B for ARM)
* 16 : Mem-AP
* 15-8 : Reserved
* 7-0 : AP Identity (1=AHB-AP 2=APB-AP 0x10=JTAG-AP)
*/
/* Reading register for a non-existant AP should not cause an error,
* but just to be sure, try to continue searching if an error does happen.
*/
if ((retval == ERROR_OK) && /* Register read success */
((id_val & 0x0FFF0000) == 0x04770000) && /* Jedec codes match */
((id_val & 0xFF) == type_to_find)) { /* type matches*/
LOG_DEBUG("Found %s at AP index: %d (IDR=0x%08X)",
(type_to_find == AP_TYPE_AHB_AP) ? "AHB-AP" :
(type_to_find == AP_TYPE_APB_AP) ? "APB-AP" :
(type_to_find == AP_TYPE_JTAG_AP) ? "JTAG-AP" : "Unknown",
ap, id_val);
*ap_num_out = ap;
return ERROR_OK;
}
}
LOG_DEBUG("No %s found",
(type_to_find == AP_TYPE_AHB_AP) ? "AHB-AP" :
(type_to_find == AP_TYPE_APB_AP) ? "APB-AP" :
(type_to_find == AP_TYPE_JTAG_AP) ? "JTAG-AP" : "Unknown");
return ERROR_FAIL;
}
int dap_get_debugbase(struct adiv5_dap *dap, int ap,
uint32_t *out_dbgbase, uint32_t *out_apid)
{