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usb-serial: wakeup device on input 

Currently usb-serial devices are unable to send data into guests with
the xhci controller.  Data is copied into the usb-serial's buffer, but
it is not sent into the guest.  Data coming out of the guest works
properly.  usb-serial devices work properly with ehci.

Have usb-serial call usb_wakeup() when receiving data from the chardev.
This seems to notify the xhci controller and fix inbound data flow.

Also add USB_CFG_ATT_WAKEUP to the device's bmAttributes.  This matches
a real FTDI serial adapter's bmAttributes.

Signed-off-by: Jason Andryuk <jandryuk@gmail.com>
Message-id: 20200306140917.26726-1-jandryuk@gmail.com
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
master
Jason Andryuk 2020-03-06 09:09:17 -05:00 committed by Gerd Hoffmann
parent 67f17e23ba
commit 5843b6b352
1 changed files with 5 additions and 1 deletions
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6
hw/usb/dev-serial.c
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@ -98,6 +98,7 @@ do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
typedef struct {
USBDevice dev;
USBEndpoint *intr;
uint8_t recv_buf[RECV_BUF];
uint16_t recv_ptr;
uint16_t recv_used;
@ -153,7 +154,7 @@ static const USBDescDevice desc_device = {
{
.bNumInterfaces = 1,
.bConfigurationValue = 1,
.bmAttributes = USB_CFG_ATT_ONE,
.bmAttributes = USB_CFG_ATT_ONE | USB_CFG_ATT_WAKEUP,
.bMaxPower = 50,
.nif = 1,
.ifs = &desc_iface0,
@ -459,6 +460,8 @@ static void usb_serial_read(void *opaque, const uint8_t *buf, int size)
memcpy(s->recv_buf + start, buf, size);
}
s->recv_used += size;
usb_wakeup(s->intr, 0);
}
static void usb_serial_event(void *opaque, QEMUChrEvent event)
@ -513,6 +516,7 @@ static void usb_serial_realize(USBDevice *dev, Error **errp)
if (qemu_chr_fe_backend_open(&s->cs) && !dev->attached) {
usb_device_attach(dev, &error_abort);
}
s->intr = usb_ep_get(dev, USB_TOKEN_IN, 1);
}
static USBDevice *usb_braille_init(USBBus *bus, const char *unused)