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2009-12-22 Vladimir Serbinenko <phcoder@gmail.com> 

* bus/usb/uhci.c (grub_uhci_transfer): Set a limit transaction time.
	(grub_uhci_portstatus): Likewise.
	(grub_uhci_portstatus): Add necessary delay.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2009-12-22 10:15:59 +01:00
parent d4e580ed07
commit b5d5993b6d
2 changed files with 22 additions and 3 deletions
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8
ChangeLog
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@ -1,5 +1,11 @@
2009-12-22 Vladimir Serbinenko <phcoder@gmail.com>
* bus/usb/uhci.c (grub_uhci_transfer): Set a limit transaction time.
(grub_uhci_portstatus): Likewise.
(grub_uhci_portstatus): Add necessary delay.
2009-12-21 Carles Pina i Estany <carles@pina.cat>
* commands/acpi.c (options): Fix capitalizations and/or full stops.
(GRUB_MOD_INIT): Likewise.
* commands/boot.c (GRUB_MOD_INIT): Likewise.

17
bus/usb/uhci.c
View File

@ -23,7 +23,6 @@
#include <grub/usb.h>
#include <grub/usbtrans.h>
#include <grub/pci.h>
#include <grub/cpu/pci.h>
#include <grub/i386/io.h>
#include <grub/time.h>
@ -435,6 +434,7 @@ grub_uhci_transfer (grub_usb_controller_t dev,
grub_uhci_td_t td_prev = NULL;
grub_usb_err_t err = GRUB_USB_ERR_NONE;
int i;
grub_uint64_t endtime;
/* Allocate a queue head for the transfer queue. */
qh = grub_alloc_qh (u, GRUB_USB_TRANSACTION_TYPE_CONTROL);
@ -483,6 +483,7 @@ grub_uhci_transfer (grub_usb_controller_t dev,
/* Wait until either the transaction completed or an error
occurred. */
endtime = grub_get_time_ms () + 1000;
for (;;)
{
grub_uhci_td_t errtd;
@ -534,6 +535,13 @@ grub_uhci_transfer (grub_usb_controller_t dev,
updated. */
grub_dprintf ("uhci", "transaction fallthrough\n");
}
if (grub_get_time_ms () > endtime)
{
err = GRUB_USB_ERR_STALL;
grub_dprintf ("uhci", "transaction timed out\n");
goto fail;
}
grub_cpu_idle ();
}
grub_dprintf ("uhci", "transaction complete\n");
@ -573,6 +581,7 @@ grub_uhci_portstatus (grub_usb_controller_t dev,
struct grub_uhci *u = (struct grub_uhci *) dev->data;
int reg;
unsigned int status;
grub_uint64_t endtime;
grub_dprintf ("uhci", "enable=%d port=%d\n", enable, port);
@ -595,6 +604,7 @@ grub_uhci_portstatus (grub_usb_controller_t dev,
status = grub_uhci_readreg16 (u, reg);
grub_uhci_writereg16 (u, reg, status & ~(1 << 9));
grub_dprintf ("uhci", "reset completed\n");
grub_millisleep (10);
/* Enable the port. */
grub_uhci_writereg16 (u, reg, enable << 2);
@ -602,7 +612,10 @@ grub_uhci_portstatus (grub_usb_controller_t dev,
grub_dprintf ("uhci", "waiting for the port to be enabled\n");
while (! (grub_uhci_readreg16 (u, reg) & (1 << 2)));
endtime = grub_get_time_ms () + 1000;
while (! (grub_uhci_readreg16 (u, reg) & (1 << 2)))
if (grub_get_time_ms () > endtime)
return grub_error (GRUB_ERR_IO, "UHCI Timed out");
status = grub_uhci_readreg16 (u, reg);
grub_dprintf ("uhci", ">3detect=0x%02x\n", status);