- /* Validate the superframe header */
- dptr = (u8 *) (pfirst->data);
- sublen = get_unaligned_le16(dptr);
- check = get_unaligned_le16(dptr + sizeof(u16));
-
- chan = SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]);
- seq = SDPCM_PACKET_SEQUENCE(&dptr[SDPCM_FRAMETAG_LEN]);
- next_len = dptr[SDPCM_FRAMETAG_LEN + SDPCM_NEXTLEN_OFFSET];
- if ((next_len << 4) > MAX_RX_DATASZ) {
- brcmf_dbg(INFO, "nextlen too large (%d) seq %d\n",
- next_len, seq);
- next_len = 0;
- }
- bus->cur_read.len = next_len << 4;
- doff = SDPCM_DOFFSET_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
- txmax = SDPCM_WINDOW_VALUE(&dptr[SDPCM_FRAMETAG_LEN]);
-
- errcode = 0;
- if ((u16)~(sublen ^ check)) {
- brcmf_dbg(ERROR, "(superframe): HW hdr error: len/check 0x%04x/0x%04x\n",
- sublen, check);
- errcode = -1;
- } else if (roundup(sublen, bus->blocksize) != dlen) {
- brcmf_dbg(ERROR, "(superframe): len 0x%04x, rounded 0x%04x, expect 0x%04x\n",
- sublen, roundup(sublen, bus->blocksize),
- dlen);
- errcode = -1;
- } else if (SDPCM_PACKET_CHANNEL(&dptr[SDPCM_FRAMETAG_LEN]) !=
- SDPCM_GLOM_CHANNEL) {
- brcmf_dbg(ERROR, "(superframe): bad channel %d\n",
- SDPCM_PACKET_CHANNEL(
- &dptr[SDPCM_FRAMETAG_LEN]));
- errcode = -1;
- } else if (SDPCM_GLOMDESC(&dptr[SDPCM_FRAMETAG_LEN])) {
- brcmf_dbg(ERROR, "(superframe): got 2nd descriptor?\n");
- errcode = -1;
- } else if ((doff < SDPCM_HDRLEN) ||
- (doff > (pfirst->len - SDPCM_HDRLEN))) {
- brcmf_dbg(ERROR, "(superframe): Bad data offset %d: HW %d pkt %d min %d\n",
- doff, sublen, pfirst->len, SDPCM_HDRLEN);
- errcode = -1;
- }
-
- /* Check sequence number of superframe SW header */
- if (rxseq != seq) {
- brcmf_dbg(INFO, "(superframe) rx_seq %d, expected %d\n",
- seq, rxseq);
- bus->sdcnt.rx_badseq++;
- rxseq = seq;
- }
-
- /* Check window for sanity */
- if ((u8) (txmax - bus->tx_seq) > 0x40) {
- brcmf_dbg(ERROR, "unlikely tx max %d with tx_seq %d\n",
- txmax, bus->tx_seq);
- txmax = bus->tx_seq + 2;
- }
- bus->tx_max = txmax;