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usb: bugfixes for usb-serial @ xhci.

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Merge remote-tracking branch 'remotes/kraxel/tags/usb-20200317-pull-request' into staging

usb: bugfixes for usb-serial @ xhci.

# gpg: Signature made Tue 17 Mar 2020 09:50:04 GMT
# gpg:                using RSA key 4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* remotes/kraxel/tags/usb-20200317-pull-request:
  usb-serial: Fix timeout closing the device
  usb-serial: Increase receive buffer to 496
  usb-serial: chunk data to wMaxPacketSize
  usb-serial: Move USB_TOKEN_IN into a helper function

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2020-03-17 14:00:56 +00:00
commit 40c67636f6
1 changed files with 59 additions and 36 deletions
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95
hw/usb/dev-serial.c
View File

@ -29,7 +29,7 @@ do { printf("usb-serial: " fmt , ## __VA_ARGS__); } while (0)
#define DPRINTF(fmt, ...) do {} while(0)
#endif
#define RECV_BUF 384
#define RECV_BUF (512 - (2 * 8))
/* Commands */
#define FTDI_RESET 0
@ -332,7 +332,7 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
break;
case DeviceInVendor | FTDI_GET_MDM_ST:
data[0] = usb_get_modem_lines(s) | 1;
data[1] = 0;
data[1] = FTDI_THRE | FTDI_TEMT;
p->actual_length = 2;
break;
case DeviceOutVendor | FTDI_SET_EVENT_CHR:
@ -358,13 +358,67 @@ static void usb_serial_handle_control(USBDevice *dev, USBPacket *p,
}
}
static void usb_serial_token_in(USBSerialState *s, USBPacket *p)
{
const int max_packet_size = desc_iface0.eps[0].wMaxPacketSize;
int packet_len;
uint8_t header[2];
packet_len = p->iov.size;
if (packet_len <= 2) {
p->status = USB_RET_NAK;
return;
}
header[0] = usb_get_modem_lines(s) | 1;
/* We do not have the uart details */
/* handle serial break */
if (s->event_trigger && s->event_trigger & FTDI_BI) {
s->event_trigger &= ~FTDI_BI;
header[1] = FTDI_BI;
usb_packet_copy(p, header, 2);
return;
} else {
header[1] = 0;
}
if (!s->recv_used) {
p->status = USB_RET_NAK;
return;
}
while (s->recv_used && packet_len > 2) {
int first_len, len;
len = MIN(packet_len, max_packet_size);
len -= 2;
if (len > s->recv_used) {
len = s->recv_used;
}
first_len = RECV_BUF - s->recv_ptr;
if (first_len > len) {
first_len = len;
}
usb_packet_copy(p, header, 2);
usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
if (len > first_len) {
usb_packet_copy(p, s->recv_buf, len - first_len);
}
s->recv_used -= len;
s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
packet_len -= len + 2;
}
return;
}
static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
{
USBSerialState *s = (USBSerialState *)dev;
uint8_t devep = p->ep->nr;
struct iovec *iov;
uint8_t header[2];
int i, first_len, len;
int i;
switch (p->pid) {
case USB_TOKEN_OUT:
@ -382,38 +436,7 @@ static void usb_serial_handle_data(USBDevice *dev, USBPacket *p)
case USB_TOKEN_IN:
if (devep != 1)
goto fail;
first_len = RECV_BUF - s->recv_ptr;
len = p->iov.size;
if (len <= 2) {
p->status = USB_RET_NAK;
break;
}
header[0] = usb_get_modem_lines(s) | 1;
/* We do not have the uart details */
/* handle serial break */
if (s->event_trigger && s->event_trigger & FTDI_BI) {
s->event_trigger &= ~FTDI_BI;
header[1] = FTDI_BI;
usb_packet_copy(p, header, 2);
break;
} else {
header[1] = 0;
}
len -= 2;
if (len > s->recv_used)
len = s->recv_used;
if (!len) {
p->status = USB_RET_NAK;
break;
}
if (first_len > len)
first_len = len;
usb_packet_copy(p, header, 2);
usb_packet_copy(p, s->recv_buf + s->recv_ptr, first_len);
if (len > first_len)
usb_packet_copy(p, s->recv_buf, len - first_len);
s->recv_used -= len;
s->recv_ptr = (s->recv_ptr + len) % RECV_BUF;
usb_serial_token_in(s, p);
break;
default: