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[PATCH] update PCI early-handoff handling for OHCI 

The PCI "early usb handoff" quirk logic didn't work like "ohci-hcd" ...
This patch makes it do so by:

  - Resetting the controller after kicking BIOS off, matching the
    normal "chip in hardware reset" startup mode;

  - Reporting any BIOS that borks this simple handoff; it's likely
    got a few other surprises for us too.

  - Ignoring that handoff on HPPA;

The diagnostic string is mostly shared with EHCI, saving a few bytes.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 drivers/usb/host/pci-quirks.c |   22 ++++++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)
This commit is contained in:
David Brownell 2005-09-22 22:43:30 -07:00 committed by Greg Kroah-Hartman
parent f197b2c54b
commit f2cb36c1df
1 changed files with 18 additions and 4 deletions
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22
drivers/usb/host/pci-quirks.c
View File

@ -60,6 +60,7 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82371AB_2, qui
#define OHCI_INTRENABLE 0x10
#define OHCI_INTRDISABLE 0x14
#define OHCI_OCR (1 << 3) /* ownership change request */
#define OHCI_CTRL_RWC (1 << 9) /* remote wakeup connected */
#define OHCI_CTRL_IR (1 << 8) /* interrupt routing */
#define OHCI_INTR_OC (1 << 30) /* ownership change */
@ -140,13 +141,17 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
{
void __iomem *base;
int wait_time;
u32 control;
base = ioremap_nocache(pci_resource_start(pdev, 0),
pci_resource_len(pdev, 0));
if (base == NULL) return;
if (readl(base + OHCI_CONTROL) & OHCI_CTRL_IR) {
wait_time = 500; /* 0.5 seconds */
/* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */
#ifndef __hppa__
control = readl(base + OHCI_CONTROL);
if (control & OHCI_CTRL_IR) {
wait_time = 500; /* arbitrary; 5 seconds */
writel(OHCI_INTR_OC, base + OHCI_INTRENABLE);
writel(OHCI_OCR, base + OHCI_CMDSTATUS);
while (wait_time > 0 &&
@ -154,7 +159,15 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
wait_time -= 10;
msleep(10);
}
if (wait_time <= 0)
printk(KERN_WARNING "%s %s: early BIOS handoff "
"failed (BIOS bug ?)\n",
pdev->dev.bus_id, "OHCI");
/* reset controller, preserving RWC */
writel(control & OHCI_CTRL_RWC, base + OHCI_CONTROL);
}
#endif
/*
* disable interrupts
@ -211,8 +224,9 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
/*
* well, possibly buggy BIOS...
*/
printk(KERN_WARNING "EHCI early BIOS handoff "
"failed (BIOS bug ?)\n");
printk(KERN_WARNING "%s %s: early BIOS handoff "
"failed (BIOS bug ?)\n",
pdev->dev.bus_id, "EHCI");
pci_write_config_dword(pdev,
hcc_params + EHCI_USBLEGSUP,
EHCI_USBLEGSUP_OS);