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path: root/drivers/scsi/in2000.c
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Diffstat (limited to 'drivers/scsi/in2000.c')
-rw-r--r--drivers/scsi/in2000.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/drivers/scsi/in2000.c b/drivers/scsi/in2000.c
index 34daa3e068de..9c519876f8a0 100644
--- a/drivers/scsi/in2000.c
+++ b/drivers/scsi/in2000.c
@@ -1898,6 +1898,21 @@ static int int_tab[] in2000__INITDATA = {
10
};
+static int probe_bios(u32 addr, u32 *s1, uchar *switches)
+{
+ void __iomem *p = ioremap(addr, 0x34);
+ if (!p)
+ return 0;
+ *s1 = readl(p + 0x10);
+ if (*s1 == 0x41564f4e || readl(p + 0x30) == 0x61776c41) {
+ /* Read the switch image that's mapped into EPROM space */
+ *switches = ~readb(p + 0x20);
+ iounmap(p);
+ return 1;
+ }
+ iounmap(p);
+ return 0;
+}
static int __init in2000_detect(struct scsi_host_template * tpnt)
{
@@ -1930,6 +1945,7 @@ static int __init in2000_detect(struct scsi_host_template * tpnt)
detect_count = 0;
for (bios = 0; bios_tab[bios]; bios++) {
+ u32 s1 = 0;
if (check_setup_args("ioport", &val, buf)) {
base = val;
switches = ~inb(base + IO_SWITCHES) & 0xff;
@@ -1941,13 +1957,9 @@ static int __init in2000_detect(struct scsi_host_template * tpnt)
* for the obvious ID strings. We look for the 2 most common ones and
* hope that they cover all the cases...
*/
- else if (isa_readl(bios_tab[bios] + 0x10) == 0x41564f4e || isa_readl(bios_tab[bios] + 0x30) == 0x61776c41) {
+ else if (probe_bios(bios_tab[bios], &s1, &switches)) {
printk("Found IN2000 BIOS at 0x%x ", (unsigned int) bios_tab[bios]);
-/* Read the switch image that's mapped into EPROM space */
-
- switches = ~((isa_readb(bios_tab[bios] + 0x20) & 0xff));
-
/* Find out where the IO space is */
x = switches & (SW_ADDR0 | SW_ADDR1);
@@ -2037,7 +2049,7 @@ static int __init in2000_detect(struct scsi_host_template * tpnt)
/* Older BIOS's had a 'sync on/off' switch - use its setting */
- if (isa_readl(bios_tab[bios] + 0x10) == 0x41564f4e && (switches & SW_SYNC_DOS5))
+ if (s1 == 0x41564f4e && (switches & SW_SYNC_DOS5))
hostdata->sync_off = 0x00; /* sync defaults to on */
else
hostdata->sync_off = 0xff; /* sync defaults to off */