mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
168 lines
4.5 KiB
C
168 lines
4.5 KiB
C
/*
|
|
* Support for host VHCIs inside qemu scatternets.
|
|
*
|
|
* Copyright (C) 2008 Andrzej Zaborowski <balrog@zabor.org>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 or
|
|
* (at your option) version 3 of the License.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "qemu-common.h"
|
|
#include "sysemu/bt.h"
|
|
#include "hw/bt.h"
|
|
#include "qemu/main-loop.h"
|
|
|
|
#define VHCI_DEV "/dev/vhci"
|
|
#define VHCI_UDEV "/dev/hci_vhci"
|
|
|
|
struct bt_vhci_s {
|
|
int fd;
|
|
struct HCIInfo *info;
|
|
|
|
uint8_t hdr[4096];
|
|
int len;
|
|
};
|
|
|
|
static void vhci_read(void *opaque)
|
|
{
|
|
struct bt_vhci_s *s = (struct bt_vhci_s *) opaque;
|
|
uint8_t *pkt;
|
|
int pktlen;
|
|
|
|
/* Seems that we can't read only the header first and then the amount
|
|
* of data indicated in the header because Linux will discard everything
|
|
* that's not been read in one go. */
|
|
s->len = read(s->fd, s->hdr, sizeof(s->hdr));
|
|
|
|
if (s->len < 0) {
|
|
fprintf(stderr, "qemu: error %i reading the PDU\n", errno);
|
|
return;
|
|
}
|
|
|
|
pkt = s->hdr;
|
|
while (s->len --)
|
|
switch (*pkt ++) {
|
|
case HCI_COMMAND_PKT:
|
|
if (s->len < 3)
|
|
goto bad_pkt;
|
|
|
|
pktlen = MIN(pkt[2] + 3, s->len);
|
|
s->info->cmd_send(s->info, pkt, pktlen);
|
|
s->len -= pktlen;
|
|
pkt += pktlen;
|
|
break;
|
|
|
|
case HCI_ACLDATA_PKT:
|
|
if (s->len < 4)
|
|
goto bad_pkt;
|
|
|
|
pktlen = MIN(((pkt[3] << 8) | pkt[2]) + 4, s->len);
|
|
s->info->acl_send(s->info, pkt, pktlen);
|
|
s->len -= pktlen;
|
|
pkt += pktlen;
|
|
break;
|
|
|
|
case HCI_SCODATA_PKT:
|
|
if (s->len < 3)
|
|
goto bad_pkt;
|
|
|
|
pktlen = MIN(pkt[2] + 3, s->len);
|
|
s->info->sco_send(s->info, pkt, pktlen);
|
|
s->len -= pktlen;
|
|
pkt += pktlen;
|
|
break;
|
|
|
|
default:
|
|
bad_pkt:
|
|
fprintf(stderr, "qemu: bad HCI packet type %02x\n", pkt[-1]);
|
|
}
|
|
}
|
|
|
|
static void vhci_host_send(void *opaque,
|
|
int type, const uint8_t *data, int len)
|
|
{
|
|
struct bt_vhci_s *s = (struct bt_vhci_s *) opaque;
|
|
#if 0
|
|
uint8_t pkt = type;
|
|
struct iovec iv[2];
|
|
|
|
iv[0].iov_base = &pkt;
|
|
iv[0].iov_len = 1;
|
|
iv[1].iov_base = (void *) data;
|
|
iv[1].iov_len = len;
|
|
|
|
while (writev(s->fd, iv, 2) < 0)
|
|
if (errno != EAGAIN && errno != EINTR) {
|
|
fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
|
|
errno);
|
|
return;
|
|
}
|
|
#else
|
|
/* Apparently VHCI wants us to write everything in one chunk :-( */
|
|
static uint8_t buf[4096];
|
|
|
|
buf[0] = type;
|
|
memcpy(buf + 1, data, len);
|
|
|
|
while (write(s->fd, buf, len + 1) < 0)
|
|
if (errno != EAGAIN && errno != EINTR) {
|
|
fprintf(stderr, "qemu: error %i writing bluetooth packet.\n",
|
|
errno);
|
|
return;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static void vhci_out_hci_packet_event(void *opaque,
|
|
const uint8_t *data, int len)
|
|
{
|
|
vhci_host_send(opaque, HCI_EVENT_PKT, data, len);
|
|
}
|
|
|
|
static void vhci_out_hci_packet_acl(void *opaque,
|
|
const uint8_t *data, int len)
|
|
{
|
|
vhci_host_send(opaque, HCI_ACLDATA_PKT, data, len);
|
|
}
|
|
|
|
void bt_vhci_init(struct HCIInfo *info)
|
|
{
|
|
struct bt_vhci_s *s;
|
|
int err[2];
|
|
int fd;
|
|
|
|
fd = open(VHCI_DEV, O_RDWR);
|
|
err[0] = errno;
|
|
if (fd < 0) {
|
|
fd = open(VHCI_UDEV, O_RDWR);
|
|
err[1] = errno;
|
|
}
|
|
|
|
if (fd < 0) {
|
|
fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
|
|
VHCI_DEV, strerror(err[0]), err[0]);
|
|
fprintf(stderr, "qemu: Can't open `%s': %s (%i)\n",
|
|
VHCI_UDEV, strerror(err[1]), err[1]);
|
|
exit(-1);
|
|
}
|
|
|
|
s = g_malloc0(sizeof(struct bt_vhci_s));
|
|
s->fd = fd;
|
|
s->info = info ?: qemu_next_hci();
|
|
s->info->opaque = s;
|
|
s->info->evt_recv = vhci_out_hci_packet_event;
|
|
s->info->acl_recv = vhci_out_hci_packet_acl;
|
|
|
|
qemu_set_fd_handler(s->fd, vhci_read, NULL, s);
|
|
}
|