[SCSI] aic7xxx: Add suspend/resume support

[pandora-kernel.git] / drivers / scsi / aic7xxx / aic79xx_pci.c

diff --git a/drivers/scsi/aic7xxx/aic79xx_pci.c b/drivers/scsi/aic7xxx/aic79xx_pci.c
index 0bada00..7a203a9 100644 (file)
--- a/drivers/scsi/aic7xxx/aic79xx_pci.c
+++ b/drivers/scsi/aic7xxx/aic79xx_pci.c
@@ -389,6 +389,33 @@ ahd_pci_config(struct ahd_softc *ahd, struct ahd_pci_identity *entry)
        return error;
 }
 
+void
+ahd_pci_suspend(struct ahd_softc *ahd)
+{
+       /*
+        * Save chip register configuration data for chip resets
+        * that occur during runtime and resume events.
+        */
+       ahd->suspend_state.pci_state.devconfig =
+           ahd_pci_read_config(ahd->dev_softc, DEVCONFIG, /*bytes*/4);
+       ahd->suspend_state.pci_state.command =
+           ahd_pci_read_config(ahd->dev_softc, PCIR_COMMAND, /*bytes*/1);
+       ahd->suspend_state.pci_state.csize_lattime =
+           ahd_pci_read_config(ahd->dev_softc, CSIZE_LATTIME, /*bytes*/1);
+
+}
+
+void
+ahd_pci_resume(struct ahd_softc *ahd)
+{
+       ahd_pci_write_config(ahd->dev_softc, DEVCONFIG,
+                            ahd->suspend_state.pci_state.devconfig, /*bytes*/4);
+       ahd_pci_write_config(ahd->dev_softc, PCIR_COMMAND,
+                            ahd->suspend_state.pci_state.command, /*bytes*/1);
+       ahd_pci_write_config(ahd->dev_softc, CSIZE_LATTIME,
+                            ahd->suspend_state.pci_state.csize_lattime, /*bytes*/1);
+}
+
 /*
  * Perform some simple tests that should catch situations where
  * our registers are invalidly mapped.