#ifdef AH_DEBUG_ALQ
/*
 * ALQ register tracing support.
 *
 * Setting hw.ath.hal.alq=1 enables tracing of all register reads and
 * writes to the file /tmp/ath_hal.log.  The file format is a simple
 * fixed-size array of records.  When done logging set hw.ath.hal.alq=0
 * and then decode the file with the arcode program (that is part of the
 * HAL).  If you start+stop tracing the data will be appended to an
 * existing file.
 *
 * NB: doesn't handle multiple devices properly; only one DEVICE record
 *     is emitted and the different devices are not identified.
 */
#include <sys/alq.h>
#include <contrib/dev/ath/ah_decode.h>

static	struct alq *ath_hal_alq;
static	int ath_hal_alq_emitdev;	/* need to emit DEVICE record */
static	u_int ath_hal_alq_lost;		/* count of lost records */

static int
sysctl_hw_ath_hal_log(SYSCTL_HANDLER_ARGS)
{
	int error, enable;

	enable = (ath_hal_alq != NULL);
        error = sysctl_handle_int(oidp, &enable, 0, req);
        if (error || !req->newptr)
                return (error);

	if (enable) {
		error = suser(curthread);
		if (error)
			return (error);
		error = alq_open(&ath_hal_alq, "/tmp/ath_hal.log",
			sizeof (struct athregrec), 1024);
		ath_hal_alq_lost = 0;
		ath_hal_alq_emitdev = 1;
	} else {
		if (ath_hal_alq)
			alq_close(ath_hal_alq);
		ath_hal_alq = NULL;
	}

	return (error);
}
SYSCTL_PROC(_hw_ath_hal, OID_AUTO, log, CTLTYPE_INT|CTLFLAG_RW,
	0, 0, sysctl_hw_ath_hal_log, "I", "Enable HAL register logging");
SYSCTL_INT(_hw_ath_hal, OID_AUTO, log_lost, CTLFLAG_RW,
	&ath_hal_alq_lost, 0, "Register operations not logged");

static struct ale *
ath_hal_alq_get(struct ath_hal *ah)
{
	struct ale *ale;

	if (ath_hal_alq_emitdev) {
		ale = alq_get(ath_hal_alq, ALQ_NOWAIT);
		if (ale) {
			struct athregrec *r =
				(struct athregrec *) ale->ae_data;
			r->op = OP_DEVICE;
			r->reg = 0;
			r->val = ah->ah_devid;
			alq_post(ath_hal_alq, ale);
			ath_hal_alq_emitdev = 0;
		} else
			ath_hal_alq_lost++;
	}
	ale = alq_get(ath_hal_alq, ALQ_NOWAIT);
	if (!ale)
		ath_hal_alq_lost++;
	return ale;
}

void
OS_REG_WRITE(struct ath_hal *ah, u_int32_t reg, u_int32_t val)
{
	if (ath_hal_alq) {
		struct ale *ale = ath_hal_alq_get(ah);
		if (ale) {
			struct athregrec *r = (struct athregrec *) ale->ae_data;
			r->op = OP_WRITE;
			r->reg = reg;
			r->val = val;
			alq_post(ath_hal_alq, ale);
		}
	}
	bus_space_write_4(ah->ah_st, ah->ah_sh, reg, val);
}

u_int32_t
OS_REG_READ(struct ath_hal *ah, u_int32_t reg)
{
	u_int32_t val;

	val = bus_space_read_4(ah->ah_st, ah->ah_sh, reg);
	if (ath_hal_alq) {
		struct ale *ale = ath_hal_alq_get(ah);
		if (ale) {
			struct athregrec *r = (struct athregrec *) ale->ae_data;
			r->op = OP_READ;
			r->reg = reg;
			r->val = val;
			alq_post(ath_hal_alq, ale);
		}
	}
	return val;
}

void
OS_MARK(struct ath_hal *ah, u_int id, u_int32_t v)
{
	if (ath_hal_alq) {
		struct ale *ale = ath_hal_alq_get(ah);
		if (ale) {
			struct athregrec *r = (struct athregrec *) ale->ae_data;
			r->op = OP_MARK;
			r->reg = id;
			r->val = v;
			alq_post(ath_hal_alq, ale);
		}
	}
}
#endif /* AH_DEBUG_ALQ */