diff options
author | Dave Kleikamp <shaggy@austin.ibm.com> | 2006-03-14 17:05:45 -0600 |
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committer | Dave Kleikamp <shaggy@austin.ibm.com> | 2006-03-14 17:05:45 -0600 |
commit | c5111f504d2a9b0d258d7c4752b4093523315989 (patch) | |
tree | 6a52864aff79691689aea21cb0cb928327d5de5b /drivers/usb/host/ehci-pci.c | |
parent | 69eb66d7da7dba2696281981347698e1693c2340 (diff) | |
parent | a488edc914aa1d766a4e2c982b5ae03d5657ec1b (diff) |
Merge with /home/shaggy/git/linus-clean/
Diffstat (limited to 'drivers/usb/host/ehci-pci.c')
-rw-r--r-- | drivers/usb/host/ehci-pci.c | 64 |
1 files changed, 3 insertions, 61 deletions
diff --git a/drivers/usb/host/ehci-pci.c b/drivers/usb/host/ehci-pci.c index 08ca0f849da..3a6687df559 100644 --- a/drivers/usb/host/ehci-pci.c +++ b/drivers/usb/host/ehci-pci.c @@ -24,46 +24,11 @@ /*-------------------------------------------------------------------------*/ -/* 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) { u32 temp; int retval; - unsigned count = 256/4; /* optional debug port, normally in the first BAR */ temp = pci_find_capability(pdev, 0x0a); @@ -84,32 +49,9 @@ 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); |