renegade-project/linux-next
2
0
Fork 0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-14 16:23:51 +08:00
Code

pata_hpt3x2n: calculate average f_CNT

Browse Source 
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>
This commit is contained in:
Sergei Shtylyov 2010-12-28 22:54:54 +03:00 committed by Jeff Garzik
parent 0ca646db68
commit dfc7e3e37d
1 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
drivers/ata/pata_hpt3x2n.c
View File

@ -25,7 +25,7 @@
#include <linux/libata.h> #include <linux/libata.h>
#define DRV_NAME "pata_hpt3x2n" #define DRV_NAME "pata_hpt3x2n"
#define DRV_VERSION "0.3.11" #define DRV_VERSION "0.3.12"
enum { enum {
HPT_PCI_FAST = (1 << 31), HPT_PCI_FAST = (1 << 31),
@ -413,8 +413,19 @@ static int hpt3x2n_pci_clock(struct pci_dev *pdev)
fcnt = inl(iobase + 0x90); /* Not PCI readable for some chips */ fcnt = inl(iobase + 0x90); /* Not PCI readable for some chips */
if ((fcnt >> 12) != 0xABCDE) { if ((fcnt >> 12) != 0xABCDE) {
printk(KERN_WARNING "hpt3xn: BIOS clock data not set.\n"); int i;
return 33; /* Not BIOS set */ 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; fcnt &= 0x1FF;