forked from luck/tmp_suning_uos_patched
[PATCH] USB: fix EHCI early handoff issues
This moves the previously widely-used ehci-pci.c BIOS handoff code into the pci-quirks.c file, replacing the less widely used "early handoff" version that seems to cause problems lately. One notable change: the "early handoff" version always enabled an SMI IRQ ... and did so even if the pre-Linux code said it was not using EHCI (and not expecting EHCI SMIs). Looks like a goof in a workaround for some unknown BIOS version. This merged version only forcibly enables those IRQs when pre-Linux code says it's using EHCI. And now it always forces them off "just in case". Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
David Brownell
Greg Kroah-Hartman
parent
3fa97c9db4
commit
401feafa62
@ -24,40 +24,6 @@
|
||||
|
||||
/*-------------------------------------------------------------------------*/
|
||||
|
||||
/* EHCI 0.96 (and later) section 5.1 says how to kick BIOS/SMM/...
|
||||
* off the controller (maybe it can boot from highspeed USB disks).
|
||||
*/
|
||||
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;
|
||||
|
||||
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, %08x)\n",
|
||||
where, cap);
|
||||
// some BIOS versions seem buggy...
|
||||
// return 1;
|
||||
ehci_warn(ehci, "continuing after BIOS bug...\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;
|
||||
}
|
||||
|
||||
/* called after powerup, by probe or system-pm "wakeup" */
|
||||
static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
|
||||
{
|
||||
@ -84,32 +50,9 @@ static int ehci_pci_reinit(struct ehci_hcd *ehci, struct pci_dev *pdev)
|
||||
}
|
||||
}
|
||||
|
||||
temp = HCC_EXT_CAPS(readl(&ehci->caps->hcc_params));
|
||||
|
||||
/* EHCI 0.96 and later may have "extended capabilities" */
|
||||
while (temp && count--) {
|
||||
u32 cap;
|
||||
|
||||
pci_read_config_dword(pdev, temp, &cap);
|
||||
ehci_dbg(ehci, "capability %04x at %02x\n", cap, temp);
|
||||
switch (cap & 0xff) {
|
||||
case 1: /* BIOS/SMM/... handoff */
|
||||
if (bios_handoff(ehci, temp, cap) != 0)
|
||||
return -EOPNOTSUPP;
|
||||
break;
|
||||
case 0: /* illegal reserved capability */
|
||||
ehci_dbg(ehci, "illegal capability!\n");
|
||||
cap = 0;
|
||||
/* FALLTHROUGH */
|
||||
default: /* unknown */
|
||||
break;
|
||||
}
|
||||
temp = (cap >> 8) & 0xff;
|
||||
}
|
||||
if (!count) {
|
||||
ehci_err(ehci, "bogus capabilities ... PCI problems!\n");
|
||||
return -EIO;
|
||||
}
|
||||
/* we expect static quirk code to handle the "extended capabilities"
|
||||
* (currently just BIOS handoff) allowed starting with EHCI 0.96
|
||||
*/
|
||||
|
||||
/* PCI Memory-Write-Invalidate cycle support is optional (uncommon) */
|
||||
retval = pci_set_mwi(pdev);
|
||||
|
||||
@ -190,7 +190,7 @@ static void __devinit quirk_usb_handoff_ohci(struct pci_dev *pdev)
|
||||
msleep(10);
|
||||
}
|
||||
if (wait_time <= 0)
|
||||
printk(KERN_WARNING "%s %s: early BIOS handoff "
|
||||
printk(KERN_WARNING "%s %s: BIOS handoff "
|
||||
"failed (BIOS bug ?)\n",
|
||||
pdev->dev.bus_id, "OHCI");
|
||||
|
||||
@ -212,8 +212,9 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
|
||||
{
|
||||
int wait_time, delta;
|
||||
void __iomem *base, *op_reg_base;
|
||||
u32 hcc_params, val, temp;
|
||||
u8 cap_length;
|
||||
u32 hcc_params, val;
|
||||
u8 offset, cap_length;
|
||||
int count = 256/4;
|
||||
|
||||
if (!mmio_resource_enabled(pdev, 0))
|
||||
return;
|
||||
@ -224,51 +225,80 @@ static void __devinit quirk_usb_disable_ehci(struct pci_dev *pdev)
|
||||
|
||||
cap_length = readb(base);
|
||||
op_reg_base = base + cap_length;
|
||||
hcc_params = readl(base + EHCI_HCC_PARAMS);
|
||||
hcc_params = (hcc_params >> 8) & 0xff;
|
||||
if (hcc_params) {
|
||||
pci_read_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGSUP,
|
||||
&val);
|
||||
if (((val & 0xff) == 1) && (val & EHCI_USBLEGSUP_BIOS)) {
|
||||
/*
|
||||
* Ok, BIOS is in smm mode, try to hand off...
|
||||
*/
|
||||
pci_read_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGCTLSTS,
|
||||
&temp);
|
||||
pci_write_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGCTLSTS,
|
||||
temp | EHCI_USBLEGCTLSTS_SOOE);
|
||||
val |= EHCI_USBLEGSUP_OS;
|
||||
pci_write_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGSUP,
|
||||
val);
|
||||
|
||||
wait_time = 500;
|
||||
do {
|
||||
msleep(10);
|
||||
wait_time -= 10;
|
||||
pci_read_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGSUP,
|
||||
&val);
|
||||
} while (wait_time && (val & EHCI_USBLEGSUP_BIOS));
|
||||
if (!wait_time) {
|
||||
/*
|
||||
* well, possibly buggy BIOS...
|
||||
/* EHCI 0.96 and later may have "extended capabilities"
|
||||
* spec section 5.1 explains the bios handoff, e.g. for
|
||||
* booting from USB disk or using a usb keyboard
|
||||
*/
|
||||
hcc_params = readl(base + EHCI_HCC_PARAMS);
|
||||
offset = (hcc_params >> 8) & 0xff;
|
||||
while (offset && count--) {
|
||||
u32 cap;
|
||||
int msec;
|
||||
|
||||
pci_read_config_dword(pdev, offset, &cap);
|
||||
switch (cap & 0xff) {
|
||||
case 1: /* BIOS/SMM/... handoff support */
|
||||
if ((cap & EHCI_USBLEGSUP_BIOS)) {
|
||||
pr_debug("%s %s: BIOS handoff\n",
|
||||
pdev->dev.bus_id, "EHCI");
|
||||
|
||||
/* BIOS workaround (?): be sure the
|
||||
* pre-Linux code receives the SMI
|
||||
*/
|
||||
printk(KERN_WARNING "%s %s: early BIOS handoff "
|
||||
pci_read_config_dword(pdev,
|
||||
offset + EHCI_USBLEGCTLSTS,
|
||||
&val);
|
||||
pci_write_config_dword(pdev,
|
||||
offset + EHCI_USBLEGCTLSTS,
|
||||
val | EHCI_USBLEGCTLSTS_SOOE);
|
||||
}
|
||||
|
||||
/* always say Linux will own the hardware
|
||||
* by setting EHCI_USBLEGSUP_OS.
|
||||
*/
|
||||
pci_write_config_byte(pdev, offset + 3, 1);
|
||||
|
||||
/* if boot firmware now owns EHCI, spin till
|
||||
* it hands it over.
|
||||
*/
|
||||
msec = 5000;
|
||||
while ((cap & EHCI_USBLEGSUP_BIOS) && (msec > 0)) {
|
||||
msleep(10);
|
||||
msec -= 10;
|
||||
pci_read_config_dword(pdev, offset, &cap);
|
||||
}
|
||||
|
||||
if (cap & EHCI_USBLEGSUP_BIOS) {
|
||||
/* well, possibly buggy BIOS... try to shut
|
||||
* it down, and hope nothing goes too wrong
|
||||
*/
|
||||
printk(KERN_WARNING "%s %s: BIOS handoff "
|
||||
"failed (BIOS bug ?)\n",
|
||||
pdev->dev.bus_id, "EHCI");
|
||||
pci_write_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGSUP,
|
||||
EHCI_USBLEGSUP_OS);
|
||||
pci_write_config_dword(pdev,
|
||||
hcc_params + EHCI_USBLEGCTLSTS,
|
||||
0);
|
||||
pci_write_config_byte(pdev, offset + 2, 0);
|
||||
}
|
||||
|
||||
/* just in case, always disable EHCI SMIs */
|
||||
pci_write_config_dword(pdev,
|
||||
offset + EHCI_USBLEGCTLSTS,
|
||||
0);
|
||||
break;
|
||||
case 0: /* illegal reserved capability */
|
||||
cap = 0;
|
||||
/* FALLTHROUGH */
|
||||
default:
|
||||
printk(KERN_WARNING "%s %s: unrecognized "
|
||||
"capability %02x\n",
|
||||
pdev->dev.bus_id, "EHCI",
|
||||
cap & 0xff);
|
||||
break;
|
||||
}
|
||||
offset = (cap >> 8) & 0xff;
|
||||
}
|
||||
if (!count)
|
||||
printk(KERN_DEBUG "%s %s: capability loop?\n",
|
||||
pdev->dev.bus_id, "EHCI");
|
||||
|
||||
/*
|
||||
* halt EHCI & disable its interrupts in any case
|
||||
|
||||
Loading…
Reference in New Issue
Block a user