static void handle_outbound(struct aura_node *node, struct aura_object *o, struct aura_buffer *buf)
{
int ret = -EIO;
if (OPCODE("export")) {
int gpio = aura_buffer_get_u32(buf);
slog(4, SLOG_DEBUG, "gpio: export %d", gpio);
ret = gpio_export(gpio);
} else if (OPCODE("write")) {
int gpio = aura_buffer_get_u32(buf);
int value = aura_buffer_get_u32(buf);
slog(4, SLOG_DEBUG, "gpio: write gpio %d value %d", gpio, value);
ret = gpio_write(gpio, value);
} else if (OPCODE("in")) {
int gpio = aura_buffer_get_u32(buf);
ret = gpio_in(gpio);
} else if (OPCODE("out")) {
int gpio = aura_buffer_get_u32(buf);
ret = gpio_out(gpio);
} else if (OPCODE("read")) {
int gpio = aura_buffer_get_u32(buf);
ret = gpio_read(gpio, &gpio);
aura_buffer_rewind(buf);
aura_buffer_put_u32(buf, gpio);
}
slog(0, SLOG_DEBUG, "gpio ret = %d", ret);
if (ret) {
aura_call_fail(node, o);
return;
}
aura_queue_buffer(&node->inbound_buffers, buf);
}
static void cb_event_readout_done(struct libusb_transfer *transfer)
{
struct aura_node *node = transfer->user_data;
struct usb_dev_info *inf = aura_get_transportdata(node);
struct usb_event_packet *evt;
struct aura_buffer *buf = inf->current_buffer;
struct aura_object *o;
if (0 != check_control(transfer))
goto ignore;
if (transfer->actual_length < sizeof(struct usb_event_packet))
goto ignore;
evt = (struct usb_event_packet *) libusb_control_transfer_get_data(transfer);
o = aura_etable_find_id(node->tbl, evt->id);
if (!o) {
slog(0, SLOG_ERROR, "usb: got bogus event id from device %d, resetting", evt->id);
goto panic;
}
if ((transfer->actual_length - LIBUSB_CONTROL_SETUP_SIZE) <
(sizeof(struct usb_event_packet) + o->retlen)) {
slog(0, SLOG_ERROR, "usb: short read for evt %d: %d bytes expected %d got",
evt->id, o->retlen + sizeof(struct usb_event_packet),
transfer->actual_length);
goto panic;
}
inf->pending--;
slog(4, SLOG_DEBUG, "Event readout completed, %d bytes, %d evt left",
transfer->actual_length, inf->pending);
buf->object = o;
/* Position the buffer at the start of the responses */
buf->pos = LIBUSB_CONTROL_SETUP_SIZE + sizeof(struct usb_event_packet);
aura_queue_buffer(&node->inbound_buffers, buf);
return;
panic:
usb_panic_and_reset_state(node);
ignore:
aura_buffer_release(node, buf);
inf->current_buffer = NULL;
return;
}
/* This one is small, but tricky */
static void aura_handle_inbound(struct aura_node *node)
{
while(1) {
struct aura_buffer *buf;
struct aura_object *o;
buf = aura_dequeue_buffer(&node->inbound_buffers);
if (!buf)
break;
o = buf->object;
node->current_object = o;
aura_buffer_rewind(buf);
slog(4, SLOG_DEBUG, "Handling %s id %d (%s) sync_call_running=%d",
object_is_method(o) ? "response" : "event",
o->id, o->name, node->sync_call_running);
if (object_is_method(o) && !o->pending) {
slog(0, SLOG_WARN, "Dropping orphan call result %d (%s)",
o->id, o->name);
aura_buffer_release(node, buf);
} else if (o->calldonecb) {
slog(4, SLOG_DEBUG, "Callback for method/event %d (%s)",
o->id, o->name);
o->calldonecb(node, AURA_CALL_COMPLETED, buf, o->arg);
aura_buffer_release(node, buf);
} else if (object_is_method(o) && (node->sync_call_running)) {
slog(4, SLOG_DEBUG, "Completing call for method %d (%s)",
o->id, o->name);
node->sync_call_result = AURA_CALL_COMPLETED;
node->sync_ret_buf = buf;
o->pending--;
if (o->pending < 0)
BUG(node, "Internal BUG: pending evt count lesser than zero");
} else {
/* This one is tricky. We have an event with no callback */
if (node->sync_event_max > 0) { /* Queue it up into event_queue if it's enabled */
/* If we have an overrun - drop the oldest event to free up space first*/
if (node->sync_event_max <= node->sync_event_count) {
struct aura_buffer *todrop;
const struct aura_object *dummy;
int ret = aura_get_next_event(node, &dummy, &todrop);
if (ret != 0)
BUG(node, "Internal bug, no next event");
aura_buffer_release(node, todrop);
}
/* Now just queue the next one */
aura_queue_buffer(&node->event_buffers, buf);
node->sync_event_count++;
slog(4, SLOG_DEBUG, "Queued event %d (%s) for sync readout",
o->id, o->name);
} else {
/* Last resort - try the catch-all event callback */
if (node->unhandled_evt_cb)
node->unhandled_evt_cb(node, buf, node->unhandled_evt_arg);
else /* Or just drop it with a warning */
slog(0, SLOG_WARN, "Dropping event %d (%s)",
o->id, o->name);
aura_buffer_release(node, buf);
}
}
}
node->current_object = NULL;
}