48  * Quadra sense codes taken from Apple Technical Note HW26:
49  * "Macintosh Quadra Built-In Video". The sense codes and
50  * extended sense codes have different meanings:
52  * Sense:
60  * Extended Sense:
68  * Reads from the sense register appear to be active low, i.e. a 1 indicates
71  * Writes to the sense register appear to activate pulldowns i.e. a 1 enables
75  * determine if extended sense is to be used, and then check which pins are
81     uint8_t sense;  member
346     uint8_t sense;  in macfb_sense_read()  local
350     if (macfb_sense->sense == 0x7) {  in macfb_sense_read()
351         /* Extended sense */  in macfb_sense_read()
352         sense = 0;  in macfb_sense_read()
356                 sense = (~s->regs[DAFB_MODE_SENSE >> 2] & 7) | 3;  in macfb_sense_read()
362                 sense = (~s->regs[DAFB_MODE_SENSE >> 2] & 7) | 6;  in macfb_sense_read()
368                 sense = (~s->regs[DAFB_MODE_SENSE >> 2] & 7) | 5;  in macfb_sense_read()
372         /* Normal sense */  in macfb_sense_read()
373         sense = (~macfb_sense->sense & 7) |  in macfb_sense_read()
377     trace_macfb_sense_read(sense);  in macfb_sense_read()
378     return sense;  in macfb_sense_read()