diff options
| -rw-r--r-- | hw/e1000.c | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/hw/e1000.c b/hw/e1000.c index 0da65f9a34..db9143d2bc 100644 --- a/hw/e1000.c +++ b/hw/e1000.c @@ -262,21 +262,20 @@ set_eecd(E1000State *s, int index, uint32_t val) s->eecd_state.old_eecd = val & (E1000_EECD_SK | E1000_EECD_CS | E1000_EECD_DI|E1000_EECD_FWE_MASK|E1000_EECD_REQ); + if (!(E1000_EECD_CS & val)) // CS inactive; nothing to do + return; + if (E1000_EECD_CS & (val ^ oldval)) { // CS rise edge; reset state + s->eecd_state.val_in = 0; + s->eecd_state.bitnum_in = 0; + s->eecd_state.bitnum_out = 0; + s->eecd_state.reading = 0; + } if (!(E1000_EECD_SK & (val ^ oldval))) // no clock edge return; if (!(E1000_EECD_SK & val)) { // falling edge s->eecd_state.bitnum_out++; return; } - if (!(val & E1000_EECD_CS)) { // rising, no CS (EEPROM reset) - memset(&s->eecd_state, 0, sizeof s->eecd_state); - /* - * restore old_eecd's E1000_EECD_SK (known to be on) - * to avoid false detection of a clock edge - */ - s->eecd_state.old_eecd = E1000_EECD_SK; - return; - } s->eecd_state.val_in <<= 1; if (val & E1000_EECD_DI) s->eecd_state.val_in |= 1; |