pata_hpt3x2n: calculate average f_CNT
Allow hpt3x2n_pci_clock() to calculate the average f_CNT register value iff
HighPoint BIOS hasn't saved one, just like the 'pata_hpt37x' driver (reading
the full 16-bit register, unlike what that driver does), so that this driver
would work correctly on e.g. non-x86 machine with 66 MHz PCI.
I'm not sure why Alan has only done this in one driver and not the other...
Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index 87b735a..809a4b4 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -25,7 +25,7 @@
#include <linux/libata.h>
#define DRV_NAME "pata_hpt3x2n"
-#define DRV_VERSION "0.3.11"
+#define DRV_VERSION "0.3.12"
enum {
HPT_PCI_FAST = (1 << 31),
@@ -413,8 +413,19 @@
fcnt = inl(iobase + 0x90); /* Not PCI readable for some chips */
if ((fcnt >> 12) != 0xABCDE) {
- printk(KERN_WARNING "hpt3xn: BIOS clock data not set.\n");
- return 33; /* Not BIOS set */
+ int i;
+ u16 sr;
+ u32 total = 0;
+
+ printk(KERN_WARNING "pata_hpt3x2n: BIOS clock data not set.\n");
+
+ /* This is the process the HPT371 BIOS is reported to use */
+ for (i = 0; i < 128; i++) {
+ pci_read_config_word(pdev, 0x78, &sr);
+ total += sr & 0x1FF;
+ udelay(15);
+ }
+ fcnt = total / 128;
}
fcnt &= 0x1FF;