1 files changed, 54 insertions, 0 deletions

diff --git a/drivers/net/wireless/rt2x00/rt2800lib.c b/drivers/net/wireless/rt2x00/rt2800lib.c
index 525267d4cc3e..28d82ce05527 100644
--- a/drivers/net/wireless/rt2x00/rt2800lib.c
+++ b/drivers/net/wireless/rt2x00/rt2800lib.c
@@ -281,6 +281,60 @@ int rt2800_wait_wpdma_ready(struct rt2x00_dev *rt2x00dev)
 }
 EXPORT_SYMBOL_GPL(rt2800_wait_wpdma_ready);
 
+void rt2800_write_txwi(struct sk_buff *skb, struct txentry_desc *txdesc)
+{
+        __le32 *txwi = (__le32 *)(skb->data - TXWI_DESC_SIZE);
+        u32 word;
+
+        /*
+         * Initialize TX Info descriptor
+         */
+        rt2x00_desc_read(txwi, 0, &word);
+        rt2x00_set_field32(&word, TXWI_W0_FRAG,
+                           test_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W0_MIMO_PS, 0);
+        rt2x00_set_field32(&word, TXWI_W0_CF_ACK, 0);
+        rt2x00_set_field32(&word, TXWI_W0_TS,
+                           test_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W0_AMPDU,
+                           test_bit(ENTRY_TXD_HT_AMPDU, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W0_MPDU_DENSITY, txdesc->mpdu_density);
+        rt2x00_set_field32(&word, TXWI_W0_TX_OP, txdesc->txop);
+        rt2x00_set_field32(&word, TXWI_W0_MCS, txdesc->mcs);
+        rt2x00_set_field32(&word, TXWI_W0_BW,
+                           test_bit(ENTRY_TXD_HT_BW_40, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W0_SHORT_GI,
+                           test_bit(ENTRY_TXD_HT_SHORT_GI, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W0_STBC, txdesc->stbc);
+        rt2x00_set_field32(&word, TXWI_W0_PHYMODE, txdesc->rate_mode);
+        rt2x00_desc_write(txwi, 0, word);
+
+        rt2x00_desc_read(txwi, 1, &word);
+        rt2x00_set_field32(&word, TXWI_W1_ACK,
+                           test_bit(ENTRY_TXD_ACK, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W1_NSEQ,
+                           test_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags));
+        rt2x00_set_field32(&word, TXWI_W1_BW_WIN_SIZE, txdesc->ba_size);
+        rt2x00_set_field32(&word, TXWI_W1_WIRELESS_CLI_ID,
+                           test_bit(ENTRY_TXD_ENCRYPT, &txdesc->flags) ?
+                           txdesc->key_idx : 0xff);
+        rt2x00_set_field32(&word, TXWI_W1_MPDU_TOTAL_BYTE_COUNT,
+                           txdesc->length);
+        rt2x00_set_field32(&word, TXWI_W1_PACKETID, txdesc->queue + 1);
+        rt2x00_desc_write(txwi, 1, word);
+
+        /*
+         * Always write 0 to IV/EIV fields, hardware will insert the IV
+         * from the IVEIV register when TXD_W3_WIV is set to 0.
+         * When TXD_W3_WIV is set to 1 it will use the IV data
+         * from the descriptor. The TXWI_W1_WIRELESS_CLI_ID indicates which
+         * crypto entry in the registers should be used to encrypt the frame.
+         */
+        _rt2x00_desc_write(txwi, 2, 0 /* skbdesc->iv[0] */);
+        _rt2x00_desc_write(txwi, 3, 0 /* skbdesc->iv[1] */);
+}
+EXPORT_SYMBOL_GPL(rt2800_write_txwi);
+
 #ifdef CONFIG_RT2X00_LIB_DEBUGFS
 const struct rt2x00debug rt2800_rt2x00debug = {
         .owner  = THIS_MODULE,