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path: root/drivers/usb/host/ehci-hcd.c
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Diffstat (limited to 'drivers/usb/host/ehci-hcd.c')
-rw-r--r--drivers/usb/host/ehci-hcd.c58
1 files changed, 14 insertions, 44 deletions
diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index bc69bd7aceb..35248a37b71 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -304,30 +304,31 @@ static void ehci_watchdog (unsigned long param)
*/
static int bios_handoff (struct ehci_hcd *ehci, int where, u32 cap)
{
+ struct pci_dev *pdev = to_pci_dev(ehci_to_hcd(ehci)->self.controller);
+
+ /* always say Linux will own the hardware */
+ pci_write_config_byte(pdev, where + 3, 1);
+
+ /* maybe wait a while for BIOS to respond */
if (cap & (1 << 16)) {
int msec = 5000;
- struct pci_dev *pdev =
- to_pci_dev(ehci_to_hcd(ehci)->self.controller);
- /* request handoff to OS */
- cap |= 1 << 24;
- pci_write_config_dword(pdev, where, cap);
-
- /* and wait a while for it to happen */
do {
msleep(10);
msec -= 10;
pci_read_config_dword(pdev, where, &cap);
} while ((cap & (1 << 16)) && msec);
if (cap & (1 << 16)) {
- ehci_err (ehci, "BIOS handoff failed (%d, %04x)\n",
+ ehci_err(ehci, "BIOS handoff failed (%d, %08x)\n",
where, cap);
// some BIOS versions seem buggy...
// return 1;
ehci_warn (ehci, "continuing after BIOS bug...\n");
- return 0;
- }
- ehci_dbg (ehci, "BIOS handoff succeeded\n");
+ /* disable all SMIs, and clear "BIOS owns" flag */
+ pci_write_config_dword(pdev, where + 4, 0);
+ pci_write_config_byte(pdev, where + 2, 0);
+ } else
+ ehci_dbg(ehci, "BIOS handoff succeeded\n");
}
return 0;
}
@@ -492,8 +493,6 @@ static int ehci_start (struct usb_hcd *hcd)
{
struct ehci_hcd *ehci = hcd_to_ehci (hcd);
u32 temp;
- struct usb_device *udev;
- struct usb_bus *bus;
int retval;
u32 hcc_params;
u8 sbrn = 0;
@@ -588,8 +587,8 @@ static int ehci_start (struct usb_hcd *hcd)
writel (0, &ehci->regs->segment);
#if 0
// this is deeply broken on almost all architectures
- if (!pci_set_dma_mask (to_pci_dev(hcd->self.controller), 0xffffffffffffffffULL))
- ehci_info (ehci, "enabled 64bit PCI DMA\n");
+ if (!dma_set_mask (hcd->self.controller, DMA_64BIT_MASK))
+ ehci_info (ehci, "enabled 64bit DMA\n");
#endif
}
@@ -631,17 +630,6 @@ static int ehci_start (struct usb_hcd *hcd)
/* set async sleep time = 10 us ... ? */
- /* wire up the root hub */
- bus = hcd_to_bus (hcd);
- udev = first ? usb_alloc_dev (NULL, bus, 0) : bus->root_hub;
- if (!udev) {
-done2:
- ehci_mem_cleanup (ehci);
- return -ENOMEM;
- }
- udev->speed = USB_SPEED_HIGH;
- udev->state = first ? USB_STATE_ATTACHED : USB_STATE_CONFIGURED;
-
/*
* Start, enabling full USB 2.0 functionality ... usb 1.1 devices
* are explicitly handed to companion controller(s), so no TT is
@@ -664,24 +652,6 @@ done2:
first ? "initialized" : "restarted",
temp >> 8, temp & 0xff, DRIVER_VERSION);
- /*
- * From here on, khubd concurrently accesses the root
- * hub; drivers will be talking to enumerated devices.
- * (On restart paths, khubd already knows about the root
- * hub and could find work as soon as we wrote FLAG_CF.)
- *
- * Before this point the HC was idle/ready. After, khubd
- * and device drivers may start it running.
- */
- if (first && usb_hcd_register_root_hub (udev, hcd) != 0) {
- if (hcd->state == HC_STATE_RUNNING)
- ehci_quiesce (ehci);
- ehci_reset (ehci);
- usb_put_dev (udev);
- retval = -ENODEV;
- goto done2;
- }
-
writel (INTR_MASK, &ehci->regs->intr_enable); /* Turn On Interrupts */
if (first)