/*
 * Pi HS DE/IN via GPIO v2 ioctl (Rev E J19). Used when POG422_HS_PATH=pi.
 * pinctrl system()/popen is init/fallback only — not the inject hot path.
 *
 * machine: DE=BCM11 M-S_OUT, IN=BCM9 M-S_IN (active-low)
 * ois:     DE=BCM10 OIS_OUT,  IN=BCM8 OIS_IN  (active-low)
 *
 * OUT idle = drive low (never high-Z into TXS). IN low = bus driven.
 */
#ifndef POG422_PI_HS_H
#define POG422_PI_HS_H

#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

/* 1 if POG422_HS_PATH resolves to pi (env or /etc/ethergold/ethergold.env). */
int pog422_pi_hs_enabled(void);

/* Channel from POG422_UARTD_CHANNEL (machine|ois). Default machine. */
int pog422_pi_hs_is_ois(void);

/* DE BCM for current channel (11 or 10). */
int pog422_pi_hs_de_bcm(void);

/* IN BCM for current channel (9 or 8). */
int pog422_pi_hs_in_bcm(void);

/* Drive DE high (1) or idle-low (0). Best-effort pinctrl. */
int pog422_pi_hs_de_set(int high);

/* Read HS IN: *active=1 when bus driven (IN low). Returns 0 ok, <0 on error. */
int pog422_pi_hs_in_active(uint8_t *active);

/* Configure IN as input+pu and OUT idle-low. Call once when Pi HS enables. */
int pog422_pi_hs_ensure_pins(void);

#ifdef __cplusplus
}
#endif

#endif /* POG422_PI_HS_H */