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usb-ehci: Fix handling of PED and PEDC port status bits

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The PED bit should only be set for highspeed devices and the PEDC bit
should not be set on "normal" PED bit changes, only on io errors.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Hans de Goede 2011-06-24 14:36:13 +02:00 committed by Gerd Hoffmann
parent 45b9fd3480
commit fbd97532d2
1 changed files with 11 additions and 13 deletions
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24
hw/usb-ehci.c
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@ -106,7 +106,7 @@
* Bits that are reserved or are read-only are masked out of values
* written to us by software
*/
#define PORTSC_RO_MASK 0x007021c4
#define PORTSC_RO_MASK 0x007021c0
#define PORTSC_RWC_MASK 0x0000002a
#define PORTSC_WKOC_E (1 << 22) // Wake on Over Current Enable
#define PORTSC_WKDS_E (1 << 21) // Wake on Disconnect Enable
@ -752,7 +752,7 @@ static void ehci_detach(USBPort *port)
ehci_queues_rip_device(s, port->dev);
*portsc &= ~PORTSC_CONNECT;
*portsc &= ~(PORTSC_CONNECT|PORTSC_PED);
*portsc |= PORTSC_CSC;
/*
@ -847,16 +847,14 @@ static void ehci_mem_writew(void *ptr, target_phys_addr_t addr, uint32_t val)
static void handle_port_status_write(EHCIState *s, int port, uint32_t val)
{
uint32_t *portsc = &s->portsc[port];
int rwc;
USBDevice *dev = s->ports[port].dev;
rwc = val & PORTSC_RWC_MASK;
/* Clear rwc bits */
*portsc &= ~(val & PORTSC_RWC_MASK);
/* The guest may clear, but not set the PED bit */
*portsc &= val | ~PORTSC_PED;
val &= PORTSC_RO_MASK;
// handle_read_write_clear(&val, portsc, PORTSC_PEDC | PORTSC_CSC);
*portsc &= ~rwc;
if ((val & PORTSC_PRESET) && !(*portsc & PORTSC_PRESET)) {
trace_usb_ehci_port_reset(port, 1);
}
@ -869,13 +867,13 @@ static void handle_port_status_write(EHCIState *s, int port, uint32_t val)
*portsc &= ~PORTSC_CSC;
}
/* Table 2.16 Set the enable bit(and enable bit change) to indicate
/*
* Table 2.16 Set the enable bit(and enable bit change) to indicate
* to SW that this port has a high speed device attached
*
* TODO - when to disable?
*/
val |= PORTSC_PED;
val |= PORTSC_PEDC;
if (dev && (dev->speedmask & USB_SPEED_MASK_HIGH)) {
val |= PORTSC_PED;
}
}
*portsc &= ~PORTSC_RO_MASK;