/* gather IR data from incoming urb, process it when we have enough */
static int redrat3_get_ir_data(struct redrat3_dev *rr3, unsigned len)
{
struct device *dev = rr3->dev;
unsigned pkttype;
int ret = 0;
rr3_ftr(dev, "Entering %s\n", __func__);
if (rr3->bytes_read == 0 && len >= sizeof(struct redrat3_header)) {
redrat3_read_packet_start(rr3, len);
} else if (rr3->bytes_read != 0) {
redrat3_read_packet_continue(rr3, len);
} else if (rr3->bytes_read == 0) {
dev_err(dev, "error: no packet data read\n");
ret = -ENODATA;
goto out;
}
if (rr3->bytes_read < be16_to_cpu(rr3->irdata.header.length) +
sizeof(struct redrat3_header))
/* we're still accumulating data */
return 0;
/* if we get here, we've got IR data to decode */
pkttype = be16_to_cpu(rr3->irdata.header.transfer_type);
if (pkttype == RR3_MOD_SIGNAL_IN)
redrat3_process_ir_data(rr3);
else
rr3_dbg(dev, "discarding non-signal data packet (type 0x%02x)\n",
pkttype);
out:
rr3->bytes_read = 0;
return ret;
}
static int redrat3_get_ir_data(struct redrat3_dev *rr3, int len)
{
struct device *dev = rr3->dev;
int ret = 0;
rr3_ftr(dev, "Entering %s\n", __func__);
if (rr3->pktlen > RR3_MAX_BUF_SIZE) {
dev_err(rr3->dev, "error: packet larger than buffer\n");
ret = -EINVAL;
goto out;
}
if ((rr3->bytes_read == 0) &&
(len >= (sizeof(rr3->pkttype) + sizeof(rr3->pktlen)))) {
redrat3_read_packet_start(rr3, len);
} else if (rr3->bytes_read != 0) {
redrat3_read_packet_continue(rr3, len);
} else if (rr3->bytes_read == 0) {
dev_err(dev, "error: no packet data read\n");
ret = -ENODATA;
goto out;
}
if (rr3->bytes_read > rr3->pktlen) {
dev_err(dev, "bytes_read (%d) greater than pktlen (%d)\n",
rr3->bytes_read, rr3->pktlen);
ret = -EINVAL;
goto out;
} else if (rr3->bytes_read < rr3->pktlen)
/* */
return 0;
/* */
if (rr3->pkttype == RR3_MOD_SIGNAL_IN)
redrat3_process_ir_data(rr3);
else
rr3_dbg(dev, "discarding non-signal data packet "
"(type 0x%02x)\n", rr3->pkttype);
out:
rr3->bytes_read = 0;
rr3->pktlen = 0;
rr3->pkttype = 0;
return ret;
}