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arm_adi_v5: Update DP (Debug Port) registers defined in ADIv5.2. 

Note:
WCR (Wire Control Register) is replaced by DLCR (Data Link Control
Register). And only TURNROUND field is modifiable.

[andreas.fritiofson@gmail.com]:

Rename DP_IDCODE to DP_DPIDR as well.

Sort list by address and align it using spaces instead of tabs. Add
comments about supporting DP versions.

Remove non-functional wcr command completely.

Change-Id: Ic6b781b07c8eead8b0237d497846d0da060cb1ba
Signed-off-by: Alamy Liu <alamy.liu@gmail.com>
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/3244
Tested-by: jenkins
This commit is contained in:
Andreas Fritiofson 2016-02-22 23:15:52 +01:00
parent 56a889f4d4
commit 150b7d26f2
2 changed files with 17 additions and 78 deletions
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72
src/target/adi_v5_swd.c
View File

@ -99,14 +99,14 @@ static int swd_run_inner(struct adiv5_dap *dap)
static int swd_connect(struct adiv5_dap *dap)
{
uint32_t idcode;
uint32_t dpidr;
int status;
/* FIXME validate transport config ... is the
* configured DAP present (check IDCODE)?
* Is *only* one DAP configured?
*
* MUST READ IDCODE
* MUST READ DPIDR
*/
/* Note, debugport_init() does setup too */
@ -116,7 +116,7 @@ static int swd_connect(struct adiv5_dap *dap)
dap->do_reconnect = false;
dap->select = DP_SELECT_INVALID;
swd_queue_dp_read(dap, DP_IDCODE, &idcode);
swd_queue_dp_read(dap, DP_DPIDR, &dpidr);
/* force clear all sticky faults */
swd_clear_sticky_errors(dap);
@ -124,7 +124,7 @@ static int swd_connect(struct adiv5_dap *dap)
status = swd_run_inner(dap);
if (status == ERROR_OK) {
LOG_INFO("SWD IDCODE %#8.8" PRIx32, idcode);
LOG_INFO("SWD DPIDR %#8.8" PRIx32, dpidr);
dap->do_reconnect = false;
} else
dap->do_reconnect = true;
@ -342,61 +342,6 @@ int dap_to_swd(struct target *target)
return retval;
}
COMMAND_HANDLER(handle_swd_wcr)
{
int retval;
struct target *target = get_current_target(CMD_CTX);
struct arm *arm = target_to_arm(target);
struct adiv5_dap *dap = arm->dap;
uint32_t wcr;
unsigned trn, scale = 0;
switch (CMD_ARGC) {
/* no-args: just dump state */
case 0:
/*retval = swd_queue_dp_read(dap, DP_WCR, &wcr); */
retval = dap_queue_dp_read(dap, DP_WCR, &wcr);
if (retval == ERROR_OK)
dap->ops->run(dap);
if (retval != ERROR_OK) {
LOG_ERROR("can't read WCR?");
return retval;
}
command_print(CMD_CTX,
"turnaround=%" PRIu32 ", prescale=%" PRIu32,
WCR_TO_TRN(wcr),
WCR_TO_PRESCALE(wcr));
return ERROR_OK;
case 2: /* TRN and prescale */
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[1], scale);
if (scale > 7) {
LOG_ERROR("prescale %d is too big", scale);
return ERROR_FAIL;
}
/* FALL THROUGH */
case 1: /* TRN only */
COMMAND_PARSE_NUMBER(uint, CMD_ARGV[0], trn);
if (trn < 1 || trn > 4) {
LOG_ERROR("turnaround %d is invalid", trn);
return ERROR_FAIL;
}
wcr = ((trn - 1) << 8) | scale;
/* FIXME
* write WCR ...
* then, re-init adapter with new TRN
*/
LOG_ERROR("can't yet modify WCR");
return ERROR_FAIL;
default: /* too many arguments */
return ERROR_COMMAND_SYNTAX_ERROR;
}
}
static const struct command_registration swd_commands[] = {
{
/*
@ -411,15 +356,6 @@ static const struct command_registration swd_commands[] = {
.mode = COMMAND_CONFIG,
.help = "declare a new SWD DAP"
},
{
.name = "wcr",
.handler = handle_swd_wcr,
.mode = COMMAND_ANY,
.help = "display or update DAP's WCR register",
.usage = "turnaround (1..4), prescale (0..7)",
},
/* REVISIT -- add a command for SWV trace on/off */
COMMAND_REGISTRATION_DONE
};

23
src/target/arm_adi_v5.h
View File

@ -47,18 +47,21 @@
/* A[3:0] for DP registers; A[1:0] are always zero.
* - JTAG accesses all of these via JTAG_DP_DPACC, except for
* IDCODE (JTAG_DP_IDCODE) and ABORT (JTAG_DP_ABORT).
* - SWD accesses these directly, sometimes needing SELECT.CTRLSEL
* - SWD accesses these directly, sometimes needing SELECT.DPBANKSEL
*/
#define DP_IDCODE BANK_REG(0x0, 0x0) /* SWD: read */
#define DP_ABORT BANK_REG(0x0, 0x0) /* SWD: write */
#define DP_CTRL_STAT BANK_REG(0x0, 0x4) /* r/w */
#define DP_RESEND BANK_REG(0x0, 0x8) /* SWD: read */
#define DP_SELECT BANK_REG(0x0, 0x8) /* JTAG: r/w; SWD: write */
#define DP_RDBUFF BANK_REG(0x0, 0xC) /* read-only */
#define DP_WCR BANK_REG(0x1, 0x4) /* SWD: r/w */
#define DP_DPIDR BANK_REG(0x0, 0x0) /* DPv1+: ro */
#define DP_ABORT BANK_REG(0x0, 0x0) /* DPv1+: SWD: wo */
#define DP_CTRL_STAT BANK_REG(0x0, 0x4) /* DPv0+: rw */
#define DP_DLCR BANK_REG(0x1, 0x4) /* DPv1+: SWD: rw */
#define DP_TARGETID BANK_REG(0x2, 0x4) /* DPv2: ro */
#define DP_DLPIDR BANK_REG(0x3, 0x4) /* DPv2: ro */
#define DP_EVENTSTAT BANK_REG(0x4, 0x4) /* DPv2: ro */
#define DP_RESEND BANK_REG(0x0, 0x8) /* DPv1+: SWD: ro */
#define DP_SELECT BANK_REG(0x0, 0x8) /* DPv0+: JTAG: rw; SWD: wo */
#define DP_RDBUFF BANK_REG(0x0, 0xC) /* DPv0+: ro */
#define DP_TARGETSEL BANK_REG(0x0, 0xC) /* DPv2: SWD: wo */
#define WCR_TO_TRN(wcr) ((uint32_t)(1 + (3 & ((wcr)) >> 8))) /* 1..4 clocks */
#define WCR_TO_PRESCALE(wcr) ((uint32_t)(7 & ((wcr)))) /* impl defined */
#define DLCR_TO_TRN(dlcr) ((uint32_t)(1 + ((3 & (dlcr)) >> 8))) /* 1..4 clocks */
/* Fields of the DP's AP ABORT register */
#define DAPABORT (1UL << 0)