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SubjectRe: Patch(2.4.5): Fix PCMCIA ATA/IDE freeze (w/ PCI add-in cards) V3
Andre Hedrick wrote:
>
> It fixes a BUG in CFA, but what will it do to the other stuff?
> Parse it exclusive to CFA and there is not an issue.
...
> Not all ./arch have a control register doing this randomly without know the
> rest of the driver will kill more than it fixes.
>

Thanks for pointing out this implementation bug. Although I fixed another problem
in ide-cs, where ctl_base could eventually be 0.

I would rather not add a special hwif->is_pcmcia flag, as
the control register (if it exists) is well defined
(bit2=softreset bit1=nIEN, others reserved; however there is
a hardcoded value of 0x08 somewhere in the ide code?).

-
Gunther



--- linux245.orig/drivers/ide/ide-cs.c Fri Feb 9 20:40:02 2001
+++ linux/drivers/ide/ide-cs.c Thu Jun 28 18:04:27 2001
@@ -42,6 +42,7 @@
#include <linux/ioport.h>
#include <linux/hdreg.h>
#include <linux/major.h>
+#include <linux/ide.h>

#include <asm/io.h>
#include <asm/system.h>
@@ -223,6 +224,15 @@
#define CFG_CHECK(fn, args...) \
if (CardServices(fn, args) != 0) goto next_entry

+int idecs_register (int arg1, int arg2, int irq)
+{
+ hw_regs_t hw;
+ ide_init_hwif_ports(&hw, (ide_ioreg_t) arg1, (ide_ioreg_t) arg2, NULL);
+ hw.irq = irq;
+ hw.chipset = ide_pci; // this enables IRQ sharing w/ PCI irqs
+ return ide_register_hw(&hw, NULL);
+}
+
void ide_config(dev_link_t *link)
{
client_handle_t handle = link->handle;
@@ -326,10 +336,12 @@

/* retry registration in case device is still spinning up */
for (i = 0; i < 10; i++) {
- hd = ide_register(io_base, ctl_base, link->irq.AssignedIRQ);
+ if(ctl_base) outb(0x02, ctl_base); // Set nIEN = disable device interrupts
+ hd = idecs_register(io_base, ctl_base, link->irq.AssignedIRQ);
if (hd >= 0) break;
if (link->io.NumPorts1 == 0x20) {
- hd = ide_register(io_base+0x10, ctl_base+0x10,
+ if(ctl_base) outb(0x02, ctl_base+0x10);
+ hd = idecs_register(io_base+0x10, ctl_base+0x10,
link->irq.AssignedIRQ);
if (hd >= 0) {
io_base += 0x10; ctl_base += 0x10;
--- linux245.orig/drivers/ide/ide-probe.c Sun Mar 18 18:25:02 2001
+++ linux/drivers/ide/ide-probe.c Thu Jun 28 18:43:43 2001
@@ -685,6 +685,9 @@
#else /* !CONFIG_IDEPCI_SHARE_IRQ */
int sa = (hwif->chipset == ide_pci) ? SA_INTERRUPT|SA_SHIRQ : SA_INTERRUPT;
#endif /* CONFIG_IDEPCI_SHARE_IRQ */
+
+ if(hwif->io_ports[IDE_CONTROL_OFFSET])
+ OUT_BYTE(0x00, hwif->io_ports[IDE_CONTROL_OFFSET]); // clear nIEN == enable irqs
if (ide_request_irq(hwif->irq, &ide_intr, sa, hwif->name, hwgroup)) {
if (!match)
kfree(hwgroup);
--- linux245.orig/drivers/ide/ide.c Wed May 2 01:05:00 2001
+++ linux/drivers/ide/ide.c Thu Jun 28 18:04:42 2001
@@ -2181,6 +2181,7 @@
memcpy(hwif->io_ports, hwif->hw.io_ports, sizeof(hwif->hw.io_ports));
hwif->irq = hw->irq;
hwif->noprobe = 0;
+ hwif->chipset = hw->chipset;

if (!initializing) {
ide_probe_module();
--- linux245.orig/include/linux/ide.h Sat May 26 03:02:42 2001
+++ linux/include/linux/ide.h Thu Jun 28 18:18:05 2001
@@ -226,6 +226,19 @@
#endif

/*
+ * hwif_chipset_t is used to keep track of the specific hardware
+ * chipset used by each IDE interface, if known.
+ */
+typedef enum { ide_unknown, ide_generic, ide_pci,
+ ide_cmd640, ide_dtc2278, ide_ali14xx,
+ ide_qd6580, ide_umc8672, ide_ht6560b,
+ ide_pdc4030, ide_rz1000, ide_trm290,
+ ide_cmd646, ide_cy82c693, ide_4drives,
+ ide_pmac
+} hwif_chipset_t;
+
+
+/*
* Structure to hold all information about the location of this port
*/
typedef struct hw_regs_s {
@@ -234,6 +247,7 @@
int dma; /* our dma entry */
ide_ack_intr_t *ack_intr; /* acknowledge interrupt */
void *priv; /* interface specific data */
+ hwif_chipset_t chipset;
} hw_regs_t;

/*
@@ -396,17 +410,6 @@
typedef void (ide_maskproc_t) (ide_drive_t *, int);
typedef void (ide_rw_proc_t) (ide_drive_t *, ide_dma_action_t);

-/*
- * hwif_chipset_t is used to keep track of the specific hardware
- * chipset used by each IDE interface, if known.
- */
-typedef enum { ide_unknown, ide_generic, ide_pci,
- ide_cmd640, ide_dtc2278, ide_ali14xx,
- ide_qd6580, ide_umc8672, ide_ht6560b,
- ide_pdc4030, ide_rz1000, ide_trm290,
- ide_cmd646, ide_cy82c693, ide_4drives,
- ide_pmac
-} hwif_chipset_t;

#ifdef CONFIG_BLK_DEV_IDEPCI
typedef struct ide_pci_devid_s {
-
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