envctrl_xmit
if (envctrl_xmit(unitp, (caddr_t *)(void *)fanspeed,
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fan,
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fspchip, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fan, TDA8444T);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fan, TDA8444T);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fan, TDA8444T);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&initval, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&chip, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)&fspchip, PCF8574);
(void) envctrl_xmit(unitp, (caddr_t *)(void *)chip, PCF8574);
static int envctrl_xmit(struct envctrlunit *, caddr_t *, int);