summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
-rw-r--r--drivers/scsi/sym53c8xx_2/sym_hipd.c65
1 files changed, 34 insertions, 31 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c
index 1d01c24f5ae9..a671bdc07450 100644
--- a/drivers/scsi/sym53c8xx_2/sym_hipd.c
+++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c
@@ -648,6 +648,37 @@ static void sym_save_initial_setting (struct sym_hcb *np)
}
/*
+ * Set SCSI BUS mode.
+ * - LVD capable chips (895/895A/896/1010) report the current BUS mode
+ * through the STEST4 IO register.
+ * - For previous generation chips (825/825A/875), the user has to tell us
+ * how to check against HVD, since a 100% safe algorithm is not possible.
+ */
+static void sym_set_bus_mode(struct sym_hcb *np, struct sym_nvram *nvram)
+{
+ if (np->scsi_mode)
+ return;
+
+ np->scsi_mode = SMODE_SE;
+ if (np->features & (FE_ULTRA2|FE_ULTRA3))
+ np->scsi_mode = (np->sv_stest4 & SMODE);
+ else if (np->features & FE_DIFF) {
+ if (SYM_SETUP_SCSI_DIFF == 1) {
+ if (np->sv_scntl3) {
+ if (np->sv_stest2 & 0x20)
+ np->scsi_mode = SMODE_HVD;
+ } else if (nvram->type == SYM_SYMBIOS_NVRAM) {
+ if (!(INB(np, nc_gpreg) & 0x08))
+ np->scsi_mode = SMODE_HVD;
+ }
+ } else if (SYM_SETUP_SCSI_DIFF == 2)
+ np->scsi_mode = SMODE_HVD;
+ }
+ if (np->scsi_mode == SMODE_HVD)
+ np->rv_stest2 |= 0x20;
+}
+
+/*
* Prepare io register values used by sym_start_up()
* according to selected and supported features.
*/
@@ -657,10 +688,7 @@ static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, stru
u32 period;
int i;
- /*
- * Wide ?
- */
- np->maxwide = (np->features & FE_WIDE)? 1 : 0;
+ np->maxwide = (np->features & FE_WIDE) ? 1 : 0;
/*
* Guess the frequency of the chip's clock.
@@ -841,6 +869,7 @@ static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, stru
* Get parity checking, host ID and verbose mode from NVRAM
*/
np->myaddr = 255;
+ np->scsi_mode = 0;
sym_nvram_setup_host(shost, np, nvram);
/*
@@ -857,33 +886,7 @@ static int sym_prepare_setting(struct Scsi_Host *shost, struct sym_hcb *np, stru
*/
sym_init_burst(np, burst_max);
- /*
- * Set SCSI BUS mode.
- * - LVD capable chips (895/895A/896/1010) report the
- * current BUS mode through the STEST4 IO register.
- * - For previous generation chips (825/825A/875),
- * user has to tell us how to check against HVD,
- * since a 100% safe algorithm is not possible.
- */
- np->scsi_mode = SMODE_SE;
- if (np->features & (FE_ULTRA2|FE_ULTRA3))
- np->scsi_mode = (np->sv_stest4 & SMODE);
- else if (np->features & FE_DIFF) {
- if (SYM_SETUP_SCSI_DIFF == 1) {
- if (np->sv_scntl3) {
- if (np->sv_stest2 & 0x20)
- np->scsi_mode = SMODE_HVD;
- }
- else if (nvram->type == SYM_SYMBIOS_NVRAM) {
- if (!(INB(np, nc_gpreg) & 0x08))
- np->scsi_mode = SMODE_HVD;
- }
- }
- else if (SYM_SETUP_SCSI_DIFF == 2)
- np->scsi_mode = SMODE_HVD;
- }
- if (np->scsi_mode == SMODE_HVD)
- np->rv_stest2 |= 0x20;
+ sym_set_bus_mode(np, nvram);
/*
* Set LED support from SCRIPTS.
OpenPOWER on IntegriCloud