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clear port status change afte polling it

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This commit is contained in:
Vladimir 'phcoder' Serbinenko 2010-08-21 21:39:15 +02:00
parent b481fe847a
commit 3593f89bf3
2 changed files with 32 additions and 4 deletions
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10
bus/usb/ohci.c
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@ -1350,7 +1350,15 @@ grub_ohci_detect_dev (grub_usb_controller_t dev, int port, int *changed)
grub_dprintf ("ohci", "detect_dev status=0x%02x\n", status);
/* Connect Status Change bit - it detects change of connection */
*changed = ((status & GRUB_OHCI_RESET_CONNECT_CHANGE) != 0);
if (status & GRUB_OHCI_RESET_CONNECT_CHANGE)
{
*changed = 1;
/* Reset bit Connect Status Change */
grub_ohci_writereg32 (o, GRUB_OHCI_REG_RHUBPORT + port,
GRUB_OHCI_RESET_CONNECT_CHANGE);
}
else
*changed = 0;
if (! (status & 1))
return GRUB_USB_SPEED_NONE;

24
bus/usb/uhci.c
View file

@ -39,6 +39,18 @@ typedef enum
#define GRUB_UHCI_LINK_TERMINATE 1
#define GRUB_UHCI_LINK_QUEUE_HEAD 2
enum
{
GRUB_UHCI_REG_PORTSC_CONNECT_CHANGED = 0x0002,
GRUB_UHCI_REG_PORTSC_PORT_ENABLED = 0x0004,
GRUB_UHCI_REG_PORTSC_RESUME = 0x0040,
GRUB_UHCI_REG_PORTSC_RESET = 0x0200,
GRUB_UHCI_REG_PORTSC_SUSPEND = 0x1000,
GRUB_UHCI_REG_PORTSC_RW = GRUB_UHCI_REG_PORTSC_PORT_ENABLED
| GRUB_UHCI_REG_PORTSC_RESUME | GRUB_UHCI_REG_PORTSC_RESET
| GRUB_UHCI_REG_PORTSC_SUSPEND
};
/* UHCI Queue Head. */
struct grub_uhci_qh
@ -693,7 +705,7 @@ grub_uhci_portstatus (grub_usb_controller_t dev,
return grub_error (GRUB_ERR_IO, "UHCI Timed out");
/* Reset bit Connect Status Change */
grub_uhci_writereg16 (u, reg, status | (1 << 1));
grub_uhci_writereg16 (u, reg, status | GRUB_UHCI_REG_PORTSC_CONNECT_CHANGED);
/* Read final port status */
status = grub_uhci_readreg16 (u, reg);
@ -725,7 +737,15 @@ grub_uhci_detect_dev (grub_usb_controller_t dev, int port, int *changed)
grub_dprintf ("uhci", "detect=0x%02x port=%d\n", status, port);
/* Connect Status Change bit - it detects change of connection */
*changed = ((status & (1 << 1)) != 0);
if (status & (1 << 1))
{
*changed = 1;
/* Reset bit Connect Status Change */
grub_uhci_writereg16 (u, reg, (status & GRUB_UHCI_REG_PORTSC_RW)
| GRUB_UHCI_REG_PORTSC_CONNECT_CHANGED);
}
else
*changed = 0;
if (! (status & 1))
return GRUB_USB_SPEED_NONE;