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| author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-24 05:44:19 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-03-24 05:44:19 +0100 |
| commit | 1ebbe2b20091d306453a5cf480a87e6cd28ae76f (patch) | |
| tree | f5cd7a0fa69b8b1938cb5a0faed2e7b0628072a5 /drivers/usb/host/uhci-hub.c | |
| parent | Merge branch 'linus' (diff) | |
| parent | [PATCH] w1: use kthread api. (diff) | |
| download | linux-1ebbe2b20091d306453a5cf480a87e6cd28ae76f.tar.xz linux-1ebbe2b20091d306453a5cf480a87e6cd28ae76f.zip | |
Merge branch 'linus'
Diffstat (limited to 'drivers/usb/host/uhci-hub.c')
| -rw-r--r-- | drivers/usb/host/uhci-hub.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/drivers/usb/host/uhci-hub.c b/drivers/usb/host/uhci-hub.c index a71e48a66805..152971d16769 100644 --- a/drivers/usb/host/uhci-hub.c +++ b/drivers/usb/host/uhci-hub.c @@ -99,6 +99,21 @@ static void uhci_finish_suspend(struct uhci_hcd *uhci, int port, } } +/* Wait for the UHCI controller in HP's iLO2 server management chip. + * It can take up to 250 us to finish a reset and set the CSC bit. + */ +static void wait_for_HP(unsigned long port_addr) +{ + int i; + + for (i = 10; i < 250; i += 10) { + if (inw(port_addr) & USBPORTSC_CSC) + return; + udelay(10); + } + /* Log a warning? */ +} + static void uhci_check_ports(struct uhci_hcd *uhci) { unsigned int port; @@ -113,6 +128,12 @@ static void uhci_check_ports(struct uhci_hcd *uhci) CLR_RH_PORTSTAT(USBPORTSC_PR); udelay(10); + /* HP's server management chip requires + * a longer delay. */ + if (to_pci_dev(uhci_dev(uhci))->vendor == + PCI_VENDOR_ID_HP) + wait_for_HP(port_addr); + /* If the port was enabled before, turning * reset on caused a port enable change. * Turning reset off causes a port connect |