CA_MASK
swim_write(base, phase, sel & CA_MASK);
out_8(&sw->select, sel & CA_MASK);
#define CA(n) FIELD_PREP(CA_MASK, (n))
#define CA(n) FIELD_PREP(CA_MASK, (n))
#define CTRL_INIT_MASK (M_MASK | CCM_MASK | CA_MASK | TST_MASK | NB | RFB)