diff options
Diffstat (limited to 'kernel/drivers/staging/vt6656/rxtx.c')
-rw-r--r-- | kernel/drivers/staging/vt6656/rxtx.c | 1112 |
1 files changed, 1112 insertions, 0 deletions
diff --git a/kernel/drivers/staging/vt6656/rxtx.c b/kernel/drivers/staging/vt6656/rxtx.c new file mode 100644 index 000000000..5c589962a --- /dev/null +++ b/kernel/drivers/staging/vt6656/rxtx.c @@ -0,0 +1,1112 @@ +/* + * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. + * All rights reserved. + * + * 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 of the License, or + * (at your option) any later version. + * + * 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, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + * + * File: rxtx.c + * + * Purpose: handle WMAC/802.3/802.11 rx & tx functions + * + * Author: Lyndon Chen + * + * Date: May 20, 2003 + * + * Functions: + * vnt_generate_tx_parameter - Generate tx dma required parameter. + * vnt_get_duration_le - get tx data required duration + * vnt_get_rtscts_duration_le- get rtx/cts required duration + * vnt_get_rtscts_rsvtime_le- get rts/cts reserved time + * vnt_get_rsvtime- get frame reserved time + * vnt_fill_cts_head- fulfill CTS ctl header + * + * Revision History: + * + */ + +#include <linux/etherdevice.h> +#include "device.h" +#include "rxtx.h" +#include "card.h" +#include "mac.h" +#include "rf.h" +#include "usbpipe.h" + +static const u16 vnt_time_stampoff[2][MAX_RATE] = { + {384, 288, 226, 209, 54, 43, 37, 31, 28, 25, 24, 23},/* Long Preamble */ + {384, 192, 130, 113, 54, 43, 37, 31, 28, 25, 24, 23},/* Short Preamble */ +}; + +static const u16 vnt_fb_opt0[2][5] = { + {RATE_12M, RATE_18M, RATE_24M, RATE_36M, RATE_48M}, /* fallback_rate0 */ + {RATE_12M, RATE_12M, RATE_18M, RATE_24M, RATE_36M}, /* fallback_rate1 */ +}; + +static const u16 vnt_fb_opt1[2][5] = { + {RATE_12M, RATE_18M, RATE_24M, RATE_24M, RATE_36M}, /* fallback_rate0 */ + {RATE_6M, RATE_6M, RATE_12M, RATE_12M, RATE_18M}, /* fallback_rate1 */ +}; + +#define RTSDUR_BB 0 +#define RTSDUR_BA 1 +#define RTSDUR_AA 2 +#define CTSDUR_BA 3 +#define RTSDUR_BA_F0 4 +#define RTSDUR_AA_F0 5 +#define RTSDUR_BA_F1 6 +#define RTSDUR_AA_F1 7 +#define CTSDUR_BA_F0 8 +#define CTSDUR_BA_F1 9 +#define DATADUR_B 10 +#define DATADUR_A 11 +#define DATADUR_A_F0 12 +#define DATADUR_A_F1 13 + +static struct vnt_usb_send_context + *vnt_get_free_context(struct vnt_private *priv) +{ + struct vnt_usb_send_context *context = NULL; + int ii; + + dev_dbg(&priv->usb->dev, "%s\n", __func__); + + for (ii = 0; ii < priv->num_tx_context; ii++) { + if (!priv->tx_context[ii]) + return NULL; + + context = priv->tx_context[ii]; + if (context->in_use == false) { + context->in_use = true; + memset(context->data, 0, + MAX_TOTAL_SIZE_WITH_ALL_HEADERS); + + context->hdr = NULL; + + return context; + } + } + + if (ii == priv->num_tx_context) + dev_dbg(&priv->usb->dev, "%s No Free Tx Context\n", __func__); + + return NULL; +} + +static __le16 vnt_time_stamp_off(struct vnt_private *priv, u16 rate) +{ + return cpu_to_le16(vnt_time_stampoff[priv->preamble_type % 2] + [rate % MAX_RATE]); +} + +static u32 vnt_get_rsvtime(struct vnt_private *priv, u8 pkt_type, + u32 frame_length, u16 rate, int need_ack) +{ + u32 data_time, ack_time; + + data_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + frame_length, rate); + + if (pkt_type == PK_TYPE_11B) + ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 14, (u16)priv->top_cck_basic_rate); + else + ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 14, (u16)priv->top_ofdm_basic_rate); + + if (need_ack) + return data_time + priv->sifs + ack_time; + + return data_time; +} + +static __le16 vnt_rxtx_rsvtime_le16(struct vnt_private *priv, u8 pkt_type, + u32 frame_length, u16 rate, int need_ack) +{ + return cpu_to_le16((u16)vnt_get_rsvtime(priv, pkt_type, + frame_length, rate, need_ack)); +} + +static __le16 vnt_get_rtscts_rsvtime_le(struct vnt_private *priv, + u8 rsv_type, u8 pkt_type, u32 frame_length, u16 current_rate) +{ + u32 rrv_time, rts_time, cts_time, ack_time, data_time; + + rrv_time = rts_time = cts_time = ack_time = data_time = 0; + + data_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + frame_length, current_rate); + + if (rsv_type == 0) { + rts_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 20, priv->top_cck_basic_rate); + cts_time = ack_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 14, priv->top_cck_basic_rate); + } else if (rsv_type == 1) { + rts_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 20, priv->top_cck_basic_rate); + cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 14, priv->top_cck_basic_rate); + ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 14, priv->top_ofdm_basic_rate); + } else if (rsv_type == 2) { + rts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 20, priv->top_ofdm_basic_rate); + cts_time = ack_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 14, priv->top_ofdm_basic_rate); + } else if (rsv_type == 3) { + cts_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 14, priv->top_cck_basic_rate); + ack_time = vnt_get_frame_time(priv->preamble_type, pkt_type, + 14, priv->top_ofdm_basic_rate); + + rrv_time = cts_time + ack_time + data_time + 2 * priv->sifs; + + return cpu_to_le16((u16)rrv_time); + } + + rrv_time = rts_time + cts_time + ack_time + data_time + 3 * priv->sifs; + + return cpu_to_le16((u16)rrv_time); +} + +static __le16 vnt_get_duration_le(struct vnt_private *priv, + u8 pkt_type, int need_ack) +{ + u32 ack_time = 0; + + if (need_ack) { + if (pkt_type == PK_TYPE_11B) + ack_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 14, priv->top_cck_basic_rate); + else + ack_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 14, priv->top_ofdm_basic_rate); + + return cpu_to_le16((u16)(priv->sifs + ack_time)); + } + + return 0; +} + +static __le16 vnt_get_rtscts_duration_le(struct vnt_usb_send_context *context, + u8 dur_type, u8 pkt_type, u16 rate) +{ + struct vnt_private *priv = context->priv; + u32 cts_time = 0, dur_time = 0; + u32 frame_length = context->frame_len; + u8 need_ack = context->need_ack; + + switch (dur_type) { + case RTSDUR_BB: + case RTSDUR_BA: + case RTSDUR_BA_F0: + case RTSDUR_BA_F1: + cts_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 14, priv->top_cck_basic_rate); + dur_time = cts_time + 2 * priv->sifs + + vnt_get_rsvtime(priv, pkt_type, + frame_length, rate, need_ack); + break; + + case RTSDUR_AA: + case RTSDUR_AA_F0: + case RTSDUR_AA_F1: + cts_time = vnt_get_frame_time(priv->preamble_type, + pkt_type, 14, priv->top_ofdm_basic_rate); + dur_time = cts_time + 2 * priv->sifs + + vnt_get_rsvtime(priv, pkt_type, + frame_length, rate, need_ack); + break; + + case CTSDUR_BA: + case CTSDUR_BA_F0: + case CTSDUR_BA_F1: + dur_time = priv->sifs + vnt_get_rsvtime(priv, + pkt_type, frame_length, rate, need_ack); + break; + + default: + break; + } + + return cpu_to_le16((u16)dur_time); +} + +static u16 vnt_mac_hdr_pos(struct vnt_usb_send_context *tx_context, + struct ieee80211_hdr *hdr) +{ + u8 *head = tx_context->data + offsetof(struct vnt_tx_buffer, fifo_head); + u8 *hdr_pos = (u8 *)hdr; + + tx_context->hdr = hdr; + if (!tx_context->hdr) + return 0; + + return (u16)(hdr_pos - head); +} + +static u16 vnt_rxtx_datahead_g(struct vnt_usb_send_context *tx_context, + struct vnt_tx_datahead_g *buf) +{ + + struct vnt_private *priv = tx_context->priv; + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *)tx_context->skb->data; + u32 frame_len = tx_context->frame_len; + u16 rate = tx_context->tx_rate; + u8 need_ack = tx_context->need_ack; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a); + vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate, + PK_TYPE_11B, &buf->b); + + /* Get Duration and TimeStamp */ + if (ieee80211_is_pspoll(hdr->frame_control)) { + __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15)); + + buf->duration_a = dur; + buf->duration_b = dur; + } else { + buf->duration_a = vnt_get_duration_le(priv, + tx_context->pkt_type, need_ack); + buf->duration_b = vnt_get_duration_le(priv, + PK_TYPE_11B, need_ack); + } + + buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate); + buf->time_stamp_off_b = vnt_time_stamp_off(priv, + priv->top_cck_basic_rate); + + tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); + + return le16_to_cpu(buf->duration_a); +} + +static u16 vnt_rxtx_datahead_g_fb(struct vnt_usb_send_context *tx_context, + struct vnt_tx_datahead_g_fb *buf) +{ + struct vnt_private *priv = tx_context->priv; + u32 frame_len = tx_context->frame_len; + u16 rate = tx_context->tx_rate; + u8 need_ack = tx_context->need_ack; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, frame_len, rate, tx_context->pkt_type, &buf->a); + + vnt_get_phy_field(priv, frame_len, priv->top_cck_basic_rate, + PK_TYPE_11B, &buf->b); + + /* Get Duration and TimeStamp */ + buf->duration_a = vnt_get_duration_le(priv, tx_context->pkt_type, + need_ack); + buf->duration_b = vnt_get_duration_le(priv, PK_TYPE_11B, need_ack); + + buf->duration_a_f0 = vnt_get_duration_le(priv, tx_context->pkt_type, + need_ack); + buf->duration_a_f1 = vnt_get_duration_le(priv, tx_context->pkt_type, + need_ack); + + buf->time_stamp_off_a = vnt_time_stamp_off(priv, rate); + buf->time_stamp_off_b = vnt_time_stamp_off(priv, + priv->top_cck_basic_rate); + + tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); + + return le16_to_cpu(buf->duration_a); +} + +static u16 vnt_rxtx_datahead_a_fb(struct vnt_usb_send_context *tx_context, + struct vnt_tx_datahead_a_fb *buf) +{ + struct vnt_private *priv = tx_context->priv; + u16 rate = tx_context->tx_rate; + u8 pkt_type = tx_context->pkt_type; + u8 need_ack = tx_context->need_ack; + u32 frame_len = tx_context->frame_len; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, frame_len, rate, pkt_type, &buf->a); + /* Get Duration and TimeStampOff */ + buf->duration = vnt_get_duration_le(priv, pkt_type, need_ack); + + buf->duration_f0 = vnt_get_duration_le(priv, pkt_type, need_ack); + buf->duration_f1 = vnt_get_duration_le(priv, pkt_type, need_ack); + + buf->time_stamp_off = vnt_time_stamp_off(priv, rate); + + tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); + + return le16_to_cpu(buf->duration); +} + +static u16 vnt_rxtx_datahead_ab(struct vnt_usb_send_context *tx_context, + struct vnt_tx_datahead_ab *buf) +{ + struct vnt_private *priv = tx_context->priv; + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *)tx_context->skb->data; + u32 frame_len = tx_context->frame_len; + u16 rate = tx_context->tx_rate; + u8 need_ack = tx_context->need_ack; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, frame_len, rate, + tx_context->pkt_type, &buf->ab); + + /* Get Duration and TimeStampOff */ + if (ieee80211_is_pspoll(hdr->frame_control)) { + __le16 dur = cpu_to_le16(priv->current_aid | BIT(14) | BIT(15)); + + buf->duration = dur; + } else { + buf->duration = vnt_get_duration_le(priv, tx_context->pkt_type, + need_ack); + } + + buf->time_stamp_off = vnt_time_stamp_off(priv, rate); + + tx_context->tx_hdr_size = vnt_mac_hdr_pos(tx_context, &buf->hdr); + + return le16_to_cpu(buf->duration); +} + +static int vnt_fill_ieee80211_rts(struct vnt_usb_send_context *tx_context, + struct ieee80211_rts *rts, __le16 duration) +{ + struct ieee80211_hdr *hdr = + (struct ieee80211_hdr *)tx_context->skb->data; + + rts->duration = duration; + rts->frame_control = + cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_RTS); + + ether_addr_copy(rts->ra, hdr->addr1); + ether_addr_copy(rts->ta, hdr->addr2); + + return 0; +} + +static u16 vnt_rxtx_rts_g_head(struct vnt_usb_send_context *tx_context, + struct vnt_rts_g *buf) +{ + struct vnt_private *priv = tx_context->priv; + u16 rts_frame_len = 20; + u16 current_rate = tx_context->tx_rate; + + vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate, + PK_TYPE_11B, &buf->b); + vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, + tx_context->pkt_type, &buf->a); + + buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB, + PK_TYPE_11B, + priv->top_cck_basic_rate); + buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, + tx_context->pkt_type, + current_rate); + buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA, + tx_context->pkt_type, + current_rate); + + vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa); + + return vnt_rxtx_datahead_g(tx_context, &buf->data_head); +} + +static u16 vnt_rxtx_rts_g_fb_head(struct vnt_usb_send_context *tx_context, + struct vnt_rts_g_fb *buf) +{ + struct vnt_private *priv = tx_context->priv; + u16 current_rate = tx_context->tx_rate; + u16 rts_frame_len = 20; + + vnt_get_phy_field(priv, rts_frame_len, priv->top_cck_basic_rate, + PK_TYPE_11B, &buf->b); + vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, + tx_context->pkt_type, &buf->a); + + buf->duration_bb = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BB, + PK_TYPE_11B, + priv->top_cck_basic_rate); + buf->duration_aa = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, + tx_context->pkt_type, + current_rate); + buf->duration_ba = vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA, + tx_context->pkt_type, + current_rate); + + buf->rts_duration_ba_f0 = + vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F0, + tx_context->pkt_type, + priv->tx_rate_fb0); + buf->rts_duration_aa_f0 = + vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0, + tx_context->pkt_type, + priv->tx_rate_fb0); + buf->rts_duration_ba_f1 = + vnt_get_rtscts_duration_le(tx_context, RTSDUR_BA_F1, + tx_context->pkt_type, + priv->tx_rate_fb1); + buf->rts_duration_aa_f1 = + vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1, + tx_context->pkt_type, + priv->tx_rate_fb1); + + vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration_aa); + + return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head); +} + +static u16 vnt_rxtx_rts_ab_head(struct vnt_usb_send_context *tx_context, + struct vnt_rts_ab *buf) +{ + struct vnt_private *priv = tx_context->priv; + u16 current_rate = tx_context->tx_rate; + u16 rts_frame_len = 20; + + vnt_get_phy_field(priv, rts_frame_len, priv->top_ofdm_basic_rate, + tx_context->pkt_type, &buf->ab); + + buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, + tx_context->pkt_type, + current_rate); + + vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration); + + return vnt_rxtx_datahead_ab(tx_context, &buf->data_head); +} + +static u16 vnt_rxtx_rts_a_fb_head(struct vnt_usb_send_context *tx_context, + struct vnt_rts_a_fb *buf) +{ + struct vnt_private *priv = tx_context->priv; + u16 current_rate = tx_context->tx_rate; + u16 rts_frame_len = 20; + + vnt_get_phy_field(priv, rts_frame_len, + priv->top_ofdm_basic_rate, tx_context->pkt_type, &buf->a); + + buf->duration = vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA, + tx_context->pkt_type, + current_rate); + + buf->rts_duration_f0 = + vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F0, + tx_context->pkt_type, + priv->tx_rate_fb0); + + buf->rts_duration_f1 = + vnt_get_rtscts_duration_le(tx_context, RTSDUR_AA_F1, + tx_context->pkt_type, + priv->tx_rate_fb1); + + vnt_fill_ieee80211_rts(tx_context, &buf->data, buf->duration); + + return vnt_rxtx_datahead_a_fb(tx_context, &buf->data_head); +} + +static u16 vnt_fill_cts_fb_head(struct vnt_usb_send_context *tx_context, + union vnt_tx_data_head *head) +{ + struct vnt_private *priv = tx_context->priv; + struct vnt_cts_fb *buf = &head->cts_g_fb; + u32 cts_frame_len = 14; + u16 current_rate = tx_context->tx_rate; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate, + PK_TYPE_11B, &buf->b); + + buf->duration_ba = + vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA, + tx_context->pkt_type, + current_rate); + /* Get CTSDuration_ba_f0 */ + buf->cts_duration_ba_f0 = + vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F0, + tx_context->pkt_type, + priv->tx_rate_fb0); + /* Get CTSDuration_ba_f1 */ + buf->cts_duration_ba_f1 = + vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA_F1, + tx_context->pkt_type, + priv->tx_rate_fb1); + /* Get CTS Frame body */ + buf->data.duration = buf->duration_ba; + buf->data.frame_control = + cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); + + ether_addr_copy(buf->data.ra, priv->current_net_addr); + + return vnt_rxtx_datahead_g_fb(tx_context, &buf->data_head); +} + +static u16 vnt_fill_cts_head(struct vnt_usb_send_context *tx_context, + union vnt_tx_data_head *head) +{ + struct vnt_private *priv = tx_context->priv; + struct vnt_cts *buf = &head->cts_g; + u32 cts_frame_len = 14; + u16 current_rate = tx_context->tx_rate; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, cts_frame_len, priv->top_cck_basic_rate, + PK_TYPE_11B, &buf->b); + /* Get CTSDuration_ba */ + buf->duration_ba = + vnt_get_rtscts_duration_le(tx_context, CTSDUR_BA, + tx_context->pkt_type, + current_rate); + /*Get CTS Frame body*/ + buf->data.duration = buf->duration_ba; + buf->data.frame_control = + cpu_to_le16(IEEE80211_FTYPE_CTL | IEEE80211_STYPE_CTS); + + ether_addr_copy(buf->data.ra, priv->current_net_addr); + + return vnt_rxtx_datahead_g(tx_context, &buf->data_head); +} + +static u16 vnt_rxtx_rts(struct vnt_usb_send_context *tx_context, + union vnt_tx_head *tx_head, bool need_mic) +{ + struct vnt_private *priv = tx_context->priv; + struct vnt_rrv_time_rts *buf = &tx_head->tx_rts.rts; + union vnt_tx_data_head *head = &tx_head->tx_rts.tx.head; + u32 frame_len = tx_context->frame_len; + u16 current_rate = tx_context->tx_rate; + u8 need_ack = tx_context->need_ack; + + buf->rts_rrv_time_aa = vnt_get_rtscts_rsvtime_le(priv, 2, + tx_context->pkt_type, frame_len, current_rate); + buf->rts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 1, + tx_context->pkt_type, frame_len, current_rate); + buf->rts_rrv_time_bb = vnt_get_rtscts_rsvtime_le(priv, 0, + tx_context->pkt_type, frame_len, current_rate); + + buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type, + frame_len, current_rate, + need_ack); + buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, frame_len, + priv->top_cck_basic_rate, need_ack); + + if (need_mic) + head = &tx_head->tx_rts.tx.mic.head; + + if (tx_context->fb_option) + return vnt_rxtx_rts_g_fb_head(tx_context, &head->rts_g_fb); + + return vnt_rxtx_rts_g_head(tx_context, &head->rts_g); +} + +static u16 vnt_rxtx_cts(struct vnt_usb_send_context *tx_context, + union vnt_tx_head *tx_head, bool need_mic) +{ + struct vnt_private *priv = tx_context->priv; + struct vnt_rrv_time_cts *buf = &tx_head->tx_cts.cts; + union vnt_tx_data_head *head = &tx_head->tx_cts.tx.head; + u32 frame_len = tx_context->frame_len; + u16 current_rate = tx_context->tx_rate; + u8 need_ack = tx_context->need_ack; + + buf->rrv_time_a = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type, + frame_len, current_rate, need_ack); + buf->rrv_time_b = vnt_rxtx_rsvtime_le16(priv, PK_TYPE_11B, + frame_len, priv->top_cck_basic_rate, need_ack); + + buf->cts_rrv_time_ba = vnt_get_rtscts_rsvtime_le(priv, 3, + tx_context->pkt_type, frame_len, current_rate); + + if (need_mic) + head = &tx_head->tx_cts.tx.mic.head; + + /* Fill CTS */ + if (tx_context->fb_option) + return vnt_fill_cts_fb_head(tx_context, head); + + return vnt_fill_cts_head(tx_context, head); +} + +static u16 vnt_rxtx_ab(struct vnt_usb_send_context *tx_context, + union vnt_tx_head *tx_head, bool need_rts, bool need_mic) +{ + struct vnt_private *priv = tx_context->priv; + struct vnt_rrv_time_ab *buf = &tx_head->tx_ab.ab; + union vnt_tx_data_head *head = &tx_head->tx_ab.tx.head; + u32 frame_len = tx_context->frame_len; + u16 current_rate = tx_context->tx_rate; + u8 need_ack = tx_context->need_ack; + + buf->rrv_time = vnt_rxtx_rsvtime_le16(priv, tx_context->pkt_type, + frame_len, current_rate, need_ack); + + if (need_mic) + head = &tx_head->tx_ab.tx.mic.head; + + if (need_rts) { + if (tx_context->pkt_type == PK_TYPE_11B) + buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 0, + tx_context->pkt_type, frame_len, current_rate); + else /* PK_TYPE_11A */ + buf->rts_rrv_time = vnt_get_rtscts_rsvtime_le(priv, 2, + tx_context->pkt_type, frame_len, current_rate); + + if (tx_context->fb_option && + tx_context->pkt_type == PK_TYPE_11A) + return vnt_rxtx_rts_a_fb_head(tx_context, + &head->rts_a_fb); + + return vnt_rxtx_rts_ab_head(tx_context, &head->rts_ab); + } + + if (tx_context->pkt_type == PK_TYPE_11A) + return vnt_rxtx_datahead_a_fb(tx_context, + &head->data_head_a_fb); + + return vnt_rxtx_datahead_ab(tx_context, &head->data_head_ab); +} + +static u16 vnt_generate_tx_parameter(struct vnt_usb_send_context *tx_context, + struct vnt_tx_buffer *tx_buffer, + struct vnt_mic_hdr **mic_hdr, u32 need_mic, + bool need_rts) +{ + + if (tx_context->pkt_type == PK_TYPE_11GB || + tx_context->pkt_type == PK_TYPE_11GA) { + if (need_rts) { + if (need_mic) + *mic_hdr = &tx_buffer-> + tx_head.tx_rts.tx.mic.hdr; + + return vnt_rxtx_rts(tx_context, &tx_buffer->tx_head, + need_mic); + } + + if (need_mic) + *mic_hdr = &tx_buffer->tx_head.tx_cts.tx.mic.hdr; + + return vnt_rxtx_cts(tx_context, &tx_buffer->tx_head, need_mic); + } + + if (need_mic) + *mic_hdr = &tx_buffer->tx_head.tx_ab.tx.mic.hdr; + + return vnt_rxtx_ab(tx_context, &tx_buffer->tx_head, need_rts, need_mic); +} + +static void vnt_fill_txkey(struct vnt_usb_send_context *tx_context, + u8 *key_buffer, struct ieee80211_key_conf *tx_key, struct sk_buff *skb, + u16 payload_len, struct vnt_mic_hdr *mic_hdr) +{ + struct ieee80211_hdr *hdr = tx_context->hdr; + struct ieee80211_key_seq seq; + u8 *iv = ((u8 *)hdr + ieee80211_get_hdrlen_from_skb(skb)); + + /* strip header and icv len from payload */ + payload_len -= ieee80211_get_hdrlen_from_skb(skb); + payload_len -= tx_key->icv_len; + + switch (tx_key->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + memcpy(key_buffer, iv, 3); + memcpy(key_buffer + 3, tx_key->key, tx_key->keylen); + + if (tx_key->keylen == WLAN_KEY_LEN_WEP40) { + memcpy(key_buffer + 8, iv, 3); + memcpy(key_buffer + 11, + tx_key->key, WLAN_KEY_LEN_WEP40); + } + + break; + case WLAN_CIPHER_SUITE_TKIP: + ieee80211_get_tkip_p2k(tx_key, skb, key_buffer); + + break; + case WLAN_CIPHER_SUITE_CCMP: + + if (!mic_hdr) + return; + + mic_hdr->id = 0x59; + mic_hdr->payload_len = cpu_to_be16(payload_len); + ether_addr_copy(mic_hdr->mic_addr2, hdr->addr2); + + ieee80211_get_key_tx_seq(tx_key, &seq); + + memcpy(mic_hdr->ccmp_pn, seq.ccmp.pn, IEEE80211_CCMP_PN_LEN); + + if (ieee80211_has_a4(hdr->frame_control)) + mic_hdr->hlen = cpu_to_be16(28); + else + mic_hdr->hlen = cpu_to_be16(22); + + ether_addr_copy(mic_hdr->addr1, hdr->addr1); + ether_addr_copy(mic_hdr->addr2, hdr->addr2); + ether_addr_copy(mic_hdr->addr3, hdr->addr3); + + mic_hdr->frame_control = cpu_to_le16( + le16_to_cpu(hdr->frame_control) & 0xc78f); + mic_hdr->seq_ctrl = cpu_to_le16( + le16_to_cpu(hdr->seq_ctrl) & 0xf); + + if (ieee80211_has_a4(hdr->frame_control)) + ether_addr_copy(mic_hdr->addr4, hdr->addr4); + + + memcpy(key_buffer, tx_key->key, WLAN_KEY_LEN_CCMP); + + break; + default: + break; + } + +} + +int vnt_tx_packet(struct vnt_private *priv, struct sk_buff *skb) +{ + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_tx_rate *tx_rate = &info->control.rates[0]; + struct ieee80211_rate *rate; + struct ieee80211_key_conf *tx_key; + struct ieee80211_hdr *hdr; + struct vnt_mic_hdr *mic_hdr = NULL; + struct vnt_tx_buffer *tx_buffer; + struct vnt_tx_fifo_head *tx_buffer_head; + struct vnt_usb_send_context *tx_context; + unsigned long flags; + u16 tx_bytes, tx_header_size, tx_body_size, current_rate, duration_id; + u8 pkt_type, fb_option = AUTO_FB_NONE; + bool need_rts = false, is_pspoll = false; + bool need_mic = false; + + hdr = (struct ieee80211_hdr *)(skb->data); + + rate = ieee80211_get_tx_rate(priv->hw, info); + + current_rate = rate->hw_value; + if (priv->current_rate != current_rate && + !(priv->hw->conf.flags & IEEE80211_CONF_OFFCHANNEL)) { + priv->current_rate = current_rate; + vnt_schedule_command(priv, WLAN_CMD_SETPOWER); + } + + if (current_rate > RATE_11M) { + if (info->band == IEEE80211_BAND_5GHZ) { + pkt_type = PK_TYPE_11A; + } else { + if (tx_rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT) + pkt_type = PK_TYPE_11GB; + else + pkt_type = PK_TYPE_11GA; + } + } else { + pkt_type = PK_TYPE_11B; + } + + spin_lock_irqsave(&priv->lock, flags); + + tx_context = vnt_get_free_context(priv); + if (!tx_context) { + dev_dbg(&priv->usb->dev, "%s No free context\n", __func__); + spin_unlock_irqrestore(&priv->lock, flags); + return -ENOMEM; + } + + tx_context->skb = skb; + tx_context->pkt_type = pkt_type; + tx_context->need_ack = false; + tx_context->frame_len = skb->len + 4; + tx_context->tx_rate = current_rate; + + spin_unlock_irqrestore(&priv->lock, flags); + + tx_buffer = (struct vnt_tx_buffer *)tx_context->data; + tx_buffer_head = &tx_buffer->fifo_head; + tx_body_size = skb->len; + + /*Set fifo controls */ + if (pkt_type == PK_TYPE_11A) + tx_buffer_head->fifo_ctl = 0; + else if (pkt_type == PK_TYPE_11B) + tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11B); + else if (pkt_type == PK_TYPE_11GB) + tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GB); + else if (pkt_type == PK_TYPE_11GA) + tx_buffer_head->fifo_ctl = cpu_to_le16(FIFOCTL_11GA); + + if (!ieee80211_is_data(hdr->frame_control)) { + tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_GENINT | + FIFOCTL_ISDMA0); + tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_TMOEN); + + tx_buffer_head->time_stamp = + cpu_to_le16(DEFAULT_MGN_LIFETIME_RES_64us); + } else { + tx_buffer_head->time_stamp = + cpu_to_le16(DEFAULT_MSDU_LIFETIME_RES_64us); + } + + if (!(info->flags & IEEE80211_TX_CTL_NO_ACK)) { + tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_NEEDACK); + tx_context->need_ack = true; + } + + if (ieee80211_has_retry(hdr->frame_control)) + tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LRETRY); + + if (tx_rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) + priv->preamble_type = PREAMBLE_SHORT; + else + priv->preamble_type = PREAMBLE_LONG; + + if (tx_rate->flags & IEEE80211_TX_RC_USE_RTS_CTS) { + need_rts = true; + tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_RTS); + } + + if (ieee80211_has_a4(hdr->frame_control)) + tx_buffer_head->fifo_ctl |= cpu_to_le16(FIFOCTL_LHEAD); + + if (info->flags & IEEE80211_TX_CTL_NO_PS_BUFFER) + is_pspoll = true; + + tx_buffer_head->frag_ctl = + cpu_to_le16(ieee80211_get_hdrlen_from_skb(skb) << 10); + + if (info->control.hw_key) { + tx_key = info->control.hw_key; + switch (info->control.hw_key->cipher) { + case WLAN_CIPHER_SUITE_WEP40: + case WLAN_CIPHER_SUITE_WEP104: + tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_LEGACY); + break; + case WLAN_CIPHER_SUITE_TKIP: + tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_TKIP); + break; + case WLAN_CIPHER_SUITE_CCMP: + tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_AES); + need_mic = true; + default: + break; + } + tx_context->frame_len += tx_key->icv_len; + } + + tx_buffer_head->current_rate = cpu_to_le16(current_rate); + + /* legacy rates TODO use ieee80211_tx_rate */ + if (current_rate >= RATE_18M && ieee80211_is_data(hdr->frame_control)) { + if (priv->auto_fb_ctrl == AUTO_FB_0) { + tx_buffer_head->fifo_ctl |= + cpu_to_le16(FIFOCTL_AUTO_FB_0); + + priv->tx_rate_fb0 = + vnt_fb_opt0[FB_RATE0][current_rate - RATE_18M]; + priv->tx_rate_fb1 = + vnt_fb_opt0[FB_RATE1][current_rate - RATE_18M]; + + fb_option = AUTO_FB_0; + } else if (priv->auto_fb_ctrl == AUTO_FB_1) { + tx_buffer_head->fifo_ctl |= + cpu_to_le16(FIFOCTL_AUTO_FB_1); + + priv->tx_rate_fb0 = + vnt_fb_opt1[FB_RATE0][current_rate - RATE_18M]; + priv->tx_rate_fb1 = + vnt_fb_opt1[FB_RATE1][current_rate - RATE_18M]; + + fb_option = AUTO_FB_1; + } + } + + tx_context->fb_option = fb_option; + + duration_id = vnt_generate_tx_parameter(tx_context, tx_buffer, &mic_hdr, + need_mic, need_rts); + + tx_header_size = tx_context->tx_hdr_size; + if (!tx_header_size) { + tx_context->in_use = false; + return -ENOMEM; + } + + tx_buffer_head->frag_ctl |= cpu_to_le16(FRAGCTL_NONFRAG); + + tx_bytes = tx_header_size + tx_body_size; + + memcpy(tx_context->hdr, skb->data, tx_body_size); + + hdr->duration_id = cpu_to_le16(duration_id); + + if (info->control.hw_key) { + tx_key = info->control.hw_key; + if (tx_key->keylen > 0) + vnt_fill_txkey(tx_context, tx_buffer_head->tx_key, + tx_key, skb, tx_body_size, mic_hdr); + } + + priv->seq_counter = (le16_to_cpu(hdr->seq_ctrl) & + IEEE80211_SCTL_SEQ) >> 4; + + tx_buffer->tx_byte_count = cpu_to_le16(tx_bytes); + tx_buffer->pkt_no = tx_context->pkt_no; + tx_buffer->type = 0x00; + + tx_bytes += 4; + + tx_context->type = CONTEXT_DATA_PACKET; + tx_context->buf_len = tx_bytes; + + spin_lock_irqsave(&priv->lock, flags); + + if (vnt_tx_context(priv, tx_context) != STATUS_PENDING) { + spin_unlock_irqrestore(&priv->lock, flags); + return -EIO; + } + + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +static int vnt_beacon_xmit(struct vnt_private *priv, + struct sk_buff *skb) +{ + struct vnt_beacon_buffer *beacon_buffer; + struct vnt_tx_short_buf_head *short_head; + struct ieee80211_tx_info *info; + struct vnt_usb_send_context *context; + struct ieee80211_mgmt *mgmt_hdr; + unsigned long flags; + u32 frame_size = skb->len + 4; + u16 current_rate, count; + + spin_lock_irqsave(&priv->lock, flags); + + context = vnt_get_free_context(priv); + if (!context) { + dev_dbg(&priv->usb->dev, "%s No free context!\n", __func__); + spin_unlock_irqrestore(&priv->lock, flags); + return -ENOMEM; + } + + context->skb = skb; + + spin_unlock_irqrestore(&priv->lock, flags); + + beacon_buffer = (struct vnt_beacon_buffer *)&context->data[0]; + short_head = &beacon_buffer->short_head; + + if (priv->bb_type == BB_TYPE_11A) { + current_rate = RATE_6M; + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, frame_size, current_rate, + PK_TYPE_11A, &short_head->ab); + + /* Get Duration and TimeStampOff */ + short_head->duration = vnt_get_duration_le(priv, + PK_TYPE_11A, false); + short_head->time_stamp_off = + vnt_time_stamp_off(priv, current_rate); + } else { + current_rate = RATE_1M; + short_head->fifo_ctl |= cpu_to_le16(FIFOCTL_11B); + + /* Get SignalField,ServiceField,Length */ + vnt_get_phy_field(priv, frame_size, current_rate, + PK_TYPE_11B, &short_head->ab); + + /* Get Duration and TimeStampOff */ + short_head->duration = vnt_get_duration_le(priv, + PK_TYPE_11B, false); + short_head->time_stamp_off = + vnt_time_stamp_off(priv, current_rate); + } + + /* Generate Beacon Header */ + mgmt_hdr = &beacon_buffer->mgmt_hdr; + memcpy(mgmt_hdr, skb->data, skb->len); + + /* time stamp always 0 */ + mgmt_hdr->u.beacon.timestamp = 0; + + info = IEEE80211_SKB_CB(skb); + if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) { + struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)mgmt_hdr; + + hdr->duration_id = 0; + hdr->seq_ctrl = cpu_to_le16(priv->seq_counter << 4); + } + + priv->seq_counter++; + if (priv->seq_counter > 0x0fff) + priv->seq_counter = 0; + + count = sizeof(struct vnt_tx_short_buf_head) + skb->len; + + beacon_buffer->tx_byte_count = cpu_to_le16(count); + beacon_buffer->pkt_no = context->pkt_no; + beacon_buffer->type = 0x01; + + context->type = CONTEXT_BEACON_PACKET; + context->buf_len = count + 4; /* USB header */ + + spin_lock_irqsave(&priv->lock, flags); + + if (vnt_tx_context(priv, context) != STATUS_PENDING) + ieee80211_free_txskb(priv->hw, context->skb); + + spin_unlock_irqrestore(&priv->lock, flags); + + return 0; +} + +int vnt_beacon_make(struct vnt_private *priv, struct ieee80211_vif *vif) +{ + struct sk_buff *beacon; + + beacon = ieee80211_beacon_get(priv->hw, vif); + if (!beacon) + return -ENOMEM; + + if (vnt_beacon_xmit(priv, beacon)) { + ieee80211_free_txskb(priv->hw, beacon); + return -ENODEV; + } + + return 0; +} + +int vnt_beacon_enable(struct vnt_private *priv, struct ieee80211_vif *vif, + struct ieee80211_bss_conf *conf) +{ + vnt_mac_reg_bits_off(priv, MAC_REG_TCR, TCR_AUTOBCNTX); + + vnt_mac_reg_bits_off(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN); + + vnt_mac_set_beacon_interval(priv, conf->beacon_int); + + vnt_clear_current_tsf(priv); + + vnt_mac_reg_bits_on(priv, MAC_REG_TFTCTL, TFTCTL_TSFCNTREN); + + vnt_reset_next_tbtt(priv, conf->beacon_int); + + return vnt_beacon_make(priv, vif); +} |