[SCSI] pm80xx: IButton security feature support for motherboard controllers.
Signed-off-by: Anandkumar.Santhanam@pmcs.com
Reviewed-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
diff --git a/drivers/scsi/pm8001/pm80xx_hwi.c b/drivers/scsi/pm8001/pm80xx_hwi.c
index 0a2dc56..c8a4465 100644
--- a/drivers/scsi/pm8001/pm80xx_hwi.c
+++ b/drivers/scsi/pm8001/pm80xx_hwi.c
@@ -967,6 +967,7 @@
{
u32 regval;
u32 bootloader_state;
+ u32 ibutton0, ibutton1;
/* Check if MPI is in ready state to reset */
if (mpi_uninit_check(pm8001_ha) != 0) {
@@ -1025,7 +1026,27 @@
if (-1 == check_fw_ready(pm8001_ha)) {
PM8001_FAIL_DBG(pm8001_ha,
pm8001_printk("Firmware is not ready!\n"));
- return -EBUSY;
+ /* check iButton feature support for motherboard controller */
+ if (pm8001_ha->pdev->subsystem_vendor !=
+ PCI_VENDOR_ID_ADAPTEC2 &&
+ pm8001_ha->pdev->subsystem_vendor != 0) {
+ ibutton0 = pm8001_cr32(pm8001_ha, 0,
+ MSGU_HOST_SCRATCH_PAD_6);
+ ibutton1 = pm8001_cr32(pm8001_ha, 0,
+ MSGU_HOST_SCRATCH_PAD_7);
+ if (!ibutton0 && !ibutton1) {
+ PM8001_FAIL_DBG(pm8001_ha,
+ pm8001_printk("iButton Feature is"
+ " not Available!!!\n"));
+ return -EBUSY;
+ }
+ if (ibutton0 == 0xdeadbeef && ibutton1 == 0xdeadbeef) {
+ PM8001_FAIL_DBG(pm8001_ha,
+ pm8001_printk("CRC Check for iButton"
+ " Feature Failed!!!\n"));
+ return -EBUSY;
+ }
+ }
}
PM8001_INIT_DBG(pm8001_ha,
pm8001_printk("SPCv soft reset Complete\n"));