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usb-hub: add helpers to update port state 

Add usb_hub_port_set() and usb_hub_port_clear() helpers which care about
updating the change bits (port->wPortChange) properly, so we don't need
to have that logic sprinkled all over the place ;)

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Message-id: 20190524070310.4952-4-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2019-05-24 09:03:08 +02:00
parent 9d84bb001c
commit 868a420393
1 changed files with 45 additions and 39 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

84
hw/usb/dev-hub.c
View File

@ -159,18 +159,46 @@ static const uint8_t qemu_hub_hub_descriptor[] =
/* DeviceRemovable and PortPwrCtrlMask patched in later */
};
static bool usb_hub_port_change(USBHubPort *port, uint16_t status)
{
bool notify = false;
if (status & 0x1f) {
port->wPortChange |= status;
notify = true;
}
return notify;
}
static bool usb_hub_port_set(USBHubPort *port, uint16_t status)
{
if (port->wPortStatus & status) {
return false;
}
port->wPortStatus |= status;
return usb_hub_port_change(port, status);
}
static bool usb_hub_port_clear(USBHubPort *port, uint16_t status)
{
if (!(port->wPortStatus & status)) {
return false;
}
port->wPortStatus &= ~status;
return usb_hub_port_change(port, status);
}
static void usb_hub_attach(USBPort *port1)
{
USBHubState *s = port1->opaque;
USBHubPort *port = &s->ports[port1->index];
trace_usb_hub_attach(s->dev.addr, port1->index + 1);
port->wPortStatus |= PORT_STAT_CONNECTION;
port->wPortChange |= PORT_STAT_C_CONNECTION;
usb_hub_port_set(port, PORT_STAT_CONNECTION);
if (port->port.dev->speed == USB_SPEED_LOW) {
port->wPortStatus |= PORT_STAT_LOW_SPEED;
usb_hub_port_set(port, PORT_STAT_LOW_SPEED);
} else {
port->wPortStatus &= ~PORT_STAT_LOW_SPEED;
usb_hub_port_clear(port, PORT_STAT_LOW_SPEED);
}
usb_wakeup(s->intr, 0);
}
@ -186,16 +214,9 @@ static void usb_hub_detach(USBPort *port1)
/* Let upstream know the device on this port is gone */
s->dev.port->ops->child_detach(s->dev.port, port1->dev);
port->wPortStatus &= ~PORT_STAT_CONNECTION;
port->wPortChange |= PORT_STAT_C_CONNECTION;
if (port->wPortStatus & PORT_STAT_ENABLE) {
port->wPortStatus &= ~PORT_STAT_ENABLE;
port->wPortChange |= PORT_STAT_C_ENABLE;
}
if (port->wPortStatus & PORT_STAT_SUSPEND) {
port->wPortStatus &= ~PORT_STAT_SUSPEND;
port->wPortChange |= PORT_STAT_C_SUSPEND;
}
usb_hub_port_clear(port, PORT_STAT_CONNECTION);
usb_hub_port_clear(port, PORT_STAT_ENABLE);
usb_hub_port_clear(port, PORT_STAT_SUSPEND);
usb_wakeup(s->intr, 0);
}
@ -212,9 +233,7 @@ static void usb_hub_wakeup(USBPort *port1)
USBHubState *s = port1->opaque;
USBHubPort *port = &s->ports[port1->index];
if (port->wPortStatus & PORT_STAT_SUSPEND) {
port->wPortStatus &= ~PORT_STAT_SUSPEND;
port->wPortChange |= PORT_STAT_C_SUSPEND;
if (usb_hub_port_clear(port, PORT_STAT_SUSPEND)) {
usb_wakeup(s->intr, 0);
}
}
@ -265,13 +284,13 @@ static void usb_hub_handle_reset(USBDevice *dev)
trace_usb_hub_reset(s->dev.addr);
for (i = 0; i < s->num_ports; i++) {
port = s->ports + i;
port->wPortStatus = PORT_STAT_POWER;
port->wPortStatus = 0;
port->wPortChange = 0;
usb_hub_port_set(port, PORT_STAT_POWER);
if (port->port.dev && port->port.dev->attached) {
port->wPortStatus |= PORT_STAT_CONNECTION;
port->wPortChange |= PORT_STAT_C_CONNECTION;
usb_hub_port_set(port, PORT_STAT_CONNECTION);
if (port->port.dev->speed == USB_SPEED_LOW) {
port->wPortStatus |= PORT_STAT_LOW_SPEED;
usb_hub_port_set(port, PORT_STAT_LOW_SPEED);
}
}
}
@ -372,13 +391,13 @@ static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
port->wPortStatus |= PORT_STAT_SUSPEND;
break;
case PORT_RESET:
usb_hub_port_set(port, PORT_STAT_RESET);
usb_hub_port_clear(port, PORT_STAT_RESET);
if (dev && dev->attached) {
usb_device_reset(dev);
port->wPortChange |= PORT_STAT_C_RESET;
/* set enable bit */
port->wPortStatus |= PORT_STAT_ENABLE;
usb_wakeup(s->intr, 0);
usb_hub_port_set(port, PORT_STAT_ENABLE);
}
usb_wakeup(s->intr, 0);
break;
case PORT_POWER:
break;
@ -407,20 +426,7 @@ static void usb_hub_handle_control(USBDevice *dev, USBPacket *p,
port->wPortChange &= ~PORT_STAT_C_ENABLE;
break;
case PORT_SUSPEND:
if (port->wPortStatus & PORT_STAT_SUSPEND) {
port->wPortStatus &= ~PORT_STAT_SUSPEND;
/*
* USB Spec rev2.0 11.24.2.7.2.3 C_PORT_SUSPEND
* "This bit is set on the following transitions:
* - On transition from the Resuming state to the
* SendEOP [sic] state"
*
* Note that this includes both remote wake-up and
* explicit ClearPortFeature(PORT_SUSPEND).
*/
port->wPortChange |= PORT_STAT_C_SUSPEND;
}
usb_hub_port_clear(port, PORT_STAT_SUSPEND);
break;
case PORT_C_SUSPEND:
port->wPortChange &= ~PORT_STAT_C_SUSPEND;