src/sys/dev/pci/if_wm.c - diff

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-version 1.229, 2012/07/22 14:33:04
+version 1.231, 2012/08/09 07:48:39
 Line 4628  wm_read_eeprom_uwire(struct wm_softc *sc
 Line 4628  wm_read_eeprom_uwire(struct wm_softc *sc
 Line 4628  wm_read_eeprom_uwire(struct wm_softc *sc
                  reg = CSR_READ(sc, WMREG_EECD) & ~(EECD_SK | EECD_DI);
                  CSR_WRITE(sc, WMREG_EECD, reg);
+                 /*
+                  * XXX: workaround for a bug in qemu-0.12.x and prior
+                  * and Xen.
+                  *
+                  * We use this workaround only for 82540 because qemu's
+                  * e1000 act as 82540.
+                  */
+                 if (sc->sc_type == WM_T_82540) {
+                         reg |= EECD_SK;
+                         CSR_WRITE(sc, WMREG_EECD, reg);
+                         reg &= ~EECD_SK;
+                         CSR_WRITE(sc, WMREG_EECD, reg);
+                         delay(2);
+                 }
+                 /* XXX: end of workaround */
                  /* Set CHIP SELECT. */
                  reg |= EECD_CS;
                  CSR_WRITE(sc, WMREG_EECD, reg);