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Subjectre:IDE problems (1.99.7)
In message "IDE problems (1.99.7)", 'pjb27@cam.ac.uk' writes:

>I'm still getting these problems with the IDE driver in pre-2.0.7.

...
>May 26 12:58:39 ermintrude linux: hdc: IRQ probe failed (0)
>May 26 12:58:39 ermintrude linux: hdc: Hmmm.. probably a driver problem.
>May 26 12:58:39 ermintrude linux: hdc: cmd640 reg 09h == 0x0a
>May 26 12:58:39 ermintrude linux: hdc: cmd640 reg 51h == 0x08

Okay, does this help?

-ml
mlord@pobox.com



--- linux-pre2.0.9/drivers/block/ide.c Wed May 29 18:55:36 1996
+++ linux/drivers/block/ide.c Wed May 29 20:44:45 1996
@@ -2369,8 +2369,13 @@
{
int hd_status, rc;
unsigned long timeout;
- int irqs = 0;
+ int irqs;
+#ifdef CONFIG_BLK_DEV_CMD640
+ int retry = 0;

+try_again:
+#endif /* CONFIG_BLK_DEV_CMD640 */
+ irqs = 0;
if (!HWIF(drive)->irq) { /* already got an IRQ? */
probe_irq_off(probe_irq_on()); /* clear dangling irqs */
irqs = probe_irq_on(); /* start monitoring irqs */
@@ -2435,9 +2440,19 @@
#ifdef CONFIG_BLK_DEV_CMD640
if (HWIF(drive)->chipset == ide_cmd640) {
extern byte (*get_cmd640_reg)(int);
+ byte reg9 = get_cmd640_reg(0x09);
printk("%s: Hmmm.. probably a driver problem.\n", drive->name);
- printk("%s: cmd640 reg 09h == 0x%02x\n", drive->name, get_cmd640_reg(9));
+ printk("%s: cmd640 reg 09h == 0x%02x\n", drive->name, reg9);
printk("%s: cmd640 reg 51h == 0x%02x\n", drive->name, get_cmd640_reg(0x51));
+ if (reg9 == 0x0a) {
+ printk("%s: perhaps PCI INTA has not been set to IRQ15?\n", drive->name);
+ if (retry++ == 0) {
+ extern void (*put_cmd640_reg)(int, int);
+ printk("%s: switching secondary interface to legacy mode\n", drive->name);
+ put_cmd640_reg(0x09,0x00);
+ goto try_again;
+ }
+ }
}
#endif /* CONFIG_BLK_DEV_CMD640 */
}
--- linux-pre2.0.9/drivers/block/cmd640.c Tue May 7 18:36:49 1996
+++ linux/drivers/block/cmd640.c Wed May 29 20:41:14 1996
@@ -109,8 +109,8 @@
static ide_tuneproc_t cmd640_tune_drive;

/* Interface to access cmd640x registers */
-static void (*put_cmd640_reg)(int reg_no, int val);
- byte (*get_cmd640_reg)(int reg_no);
+void (*put_cmd640_reg)(int reg_no, int val);
+byte (*get_cmd640_reg)(int reg_no);

enum { none, vlb, pci1, pci2 };
static int bus_type = none;

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