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authorBorislav Petkov <petkovbb@gmail.com>2008-10-10 22:39:35 +0200
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2008-10-10 22:39:35 +0200
commit20df429dd6671804999493baf2952f82582869fa (patch)
treee835d1ee54a09f75c5cf09e614da3d932eef6bb0
parentb98b3409abb697321d1b53e3e96a14243fe9fc79 (diff)
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ide-generic: handle probing of legacy io-ports v5
Avoid probing the io-ports in case an IDE PCI controller is present and it uses the legacy iobases. If we still want to enforce the probing, we do ide_generic.probe_mask=0x3f on the kernel command line. The iobase checking code is adapted from drivers/ata/pata_legacy.c after converting hex pci ids into their corresponding macros in <linux/pci_ids.h>. Also, check only BAR0/2 resources since those are guaranteed by the workaround in drivers/pci/probe.c:pci_setup_device(). Signed-off-by: Borislav Petkov <petkovbb@gmail.com> Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> [bart: trivial printk() fixups] Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
-rw-r--r--drivers/ide/ide-generic.c55
1 files changed, 51 insertions, 4 deletions
diff --git a/drivers/ide/ide-generic.c b/drivers/ide/ide-generic.c
index 8fe8b5b9cf7d..0a3cb0c33ae5 100644
--- a/drivers/ide/ide-generic.c
+++ b/drivers/ide/ide-generic.c
@@ -19,6 +19,7 @@
#include <linux/init.h>
#include <linux/module.h>
#include <linux/ide.h>
+#include <linux/pci_ids.h>
/* FIXME: convert m32r to use ide_platform host driver */
#ifdef CONFIG_M32R
@@ -27,7 +28,7 @@
#define DRV_NAME "ide_generic"
-static int probe_mask = 0x03;
+static int probe_mask;
module_param(probe_mask, int, 0);
MODULE_PARM_DESC(probe_mask, "probe mask for legacy ISA IDE ports");
@@ -100,19 +101,65 @@ static const u16 legacy_bases[] = { 0x1f0, 0x170, 0x1e8, 0x168, 0x1e0, 0x160 };
static const int legacy_irqs[] = { 14, 15, 11, 10, 8, 12 };
#endif
+static void ide_generic_check_pci_legacy_iobases(int *primary, int *secondary)
+{
+ struct pci_dev *p = NULL;
+ u16 val;
+
+ for_each_pci_dev(p) {
+
+ if (pci_resource_start(p, 0) == 0x1f0)
+ *primary = 1;
+ if (pci_resource_start(p, 2) == 0x170)
+ *secondary = 1;
+
+ /* Cyrix CS55{1,2}0 pre SFF MWDMA ATA on the bridge */
+ if (p->vendor == PCI_VENDOR_ID_CYRIX &&
+ (p->device == PCI_DEVICE_ID_CYRIX_5510 ||
+ p->device == PCI_DEVICE_ID_CYRIX_5520))
+ *primary = *secondary = 1;
+
+ /* Intel MPIIX - PIO ATA on non PCI side of bridge */
+ if (p->vendor == PCI_VENDOR_ID_INTEL &&
+ p->device == PCI_DEVICE_ID_INTEL_82371MX) {
+
+ pci_read_config_word(p, 0x6C, &val);
+ if (val & 0x8000) {
+ /* ATA port enabled */
+ if (val & 0x4000)
+ *secondary = 1;
+ else
+ *primary = 1;
+ }
+ }
+ }
+}
+
static int __init ide_generic_init(void)
{
hw_regs_t hw[MAX_HWIFS], *hws[MAX_HWIFS];
struct ide_host *host;
unsigned long io_addr;
- int i, rc;
+ int i, rc, primary = 0, secondary = 0;
#ifdef CONFIG_MIPS
if (!ide_probe_legacy())
return -ENODEV;
#endif
- printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" module "
- "parameter for probing all legacy ISA IDE ports\n");
+ ide_generic_check_pci_legacy_iobases(&primary, &secondary);
+
+ if (!probe_mask) {
+ printk(KERN_INFO DRV_NAME ": please use \"probe_mask=0x3f\" "
+ "module parameter for probing all legacy ISA IDE ports\n");
+
+ if (primary == 0)
+ probe_mask |= 0x1;
+
+ if (secondary == 0)
+ probe_mask |= 0x2;
+ } else
+ printk(KERN_INFO DRV_NAME ": enforcing probing of I/O ports "
+ "upon user request\n");
memset(hws, 0, sizeof(hw_regs_t *) * MAX_HWIFS);