-/*
-
- Broadcom B43 wireless driver
-
- Transmission (TX/RX) related functions.
-
- Copyright (C) 2005 Martin Langer <martin-langer@gmx.de>
- Copyright (C) 2005 Stefano Brivio <st3@riseup.net>
- Copyright (C) 2005, 2006 Michael Buesch <mb@bu3sch.de>
- Copyright (C) 2005 Danny van Dyk <kugelfang@gentoo.org>
- Copyright (C) 2005 Andreas Jaggi <andreas.jaggi@waterwave.ch>
-
- 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; see the file COPYING. If not, write to
- the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
- Boston, MA 02110-1301, USA.
-
-*/
-
-#include "xmit.h"
-#include "phy.h"
-#include "dma.h"
-#include "pio.h"
-
-/* Extract the bitrate out of a CCK PLCP header. */
-static u8 b43_plcp_get_bitrate_cck(struct b43_plcp_hdr6 *plcp)
-{
- switch (plcp->raw[0]) {
- case 0x0A:
- return B43_CCK_RATE_1MB;
- case 0x14:
- return B43_CCK_RATE_2MB;
- case 0x37:
- return B43_CCK_RATE_5MB;
- case 0x6E:
- return B43_CCK_RATE_11MB;
- }
- B43_WARN_ON(1);
- return 0;
-}
-
-/* Extract the bitrate out of an OFDM PLCP header. */
-static u8 b43_plcp_get_bitrate_ofdm(struct b43_plcp_hdr6 *plcp)
-{
- switch (plcp->raw[0] & 0xF) {
- case 0xB:
- return B43_OFDM_RATE_6MB;
- case 0xF:
- return B43_OFDM_RATE_9MB;
- case 0xA:
- return B43_OFDM_RATE_12MB;
- case 0xE:
- return B43_OFDM_RATE_18MB;
- case 0x9:
- return B43_OFDM_RATE_24MB;
- case 0xD:
- return B43_OFDM_RATE_36MB;
- case 0x8:
- return B43_OFDM_RATE_48MB;
- case 0xC:
- return B43_OFDM_RATE_54MB;
- }
- B43_WARN_ON(1);
- return 0;
-}
-
-u8 b43_plcp_get_ratecode_cck(const u8 bitrate)
-{
- switch (bitrate) {
- case B43_CCK_RATE_1MB:
- return 0x0A;
- case B43_CCK_RATE_2MB:
- return 0x14;
- case B43_CCK_RATE_5MB:
- return 0x37;
- case B43_CCK_RATE_11MB:
- return 0x6E;
- }
- B43_WARN_ON(1);
- return 0;
-}
-
-u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate)
-{
- switch (bitrate) {
- case B43_OFDM_RATE_6MB:
- return 0xB;
- case B43_OFDM_RATE_9MB:
- return 0xF;
- case B43_OFDM_RATE_12MB:
- return 0xA;
- case B43_OFDM_RATE_18MB:
- return 0xE;
- case B43_OFDM_RATE_24MB:
- return 0x9;
- case B43_OFDM_RATE_36MB:
- return 0xD;
- case B43_OFDM_RATE_48MB:
- return 0x8;
- case B43_OFDM_RATE_54MB:
- return 0xC;
- }
- B43_WARN_ON(1);
- return 0;
-}
-
-void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
- const u16 octets, const u8 bitrate)
-{
- __le32 *data = &(plcp->data);
- __u8 *raw = plcp->raw;
-
- if (b43_is_ofdm_rate(bitrate)) {
- *data = b43_plcp_get_ratecode_ofdm(bitrate);
- B43_WARN_ON(octets & 0xF000);
- *data |= (octets << 5);
- *data = cpu_to_le32(*data);
- } else {
- u32 plen;
-
- plen = octets * 16 / bitrate;
- if ((octets * 16 % bitrate) > 0) {
- plen++;
- if ((bitrate == B43_CCK_RATE_11MB)
- && ((octets * 8 % 11) < 4)) {
- raw[1] = 0x84;
- } else
- raw[1] = 0x04;
- } else
- raw[1] = 0x04;
- *data |= cpu_to_le32(plen << 16);
- raw[0] = b43_plcp_get_ratecode_cck(bitrate);
- }
-}
-
-static u8 b43_calc_fallback_rate(u8 bitrate)
-{
- switch (bitrate) {
- case B43_CCK_RATE_1MB:
- return B43_CCK_RATE_1MB;
- case B43_CCK_RATE_2MB:
- return B43_CCK_RATE_1MB;
- case B43_CCK_RATE_5MB:
- return B43_CCK_RATE_2MB;
- case B43_CCK_RATE_11MB:
- return B43_CCK_RATE_5MB;
- case B43_OFDM_RATE_6MB:
- return B43_CCK_RATE_5MB;
- case B43_OFDM_RATE_9MB:
- return B43_OFDM_RATE_6MB;
- case B43_OFDM_RATE_12MB:
- return B43_OFDM_RATE_9MB;
- case B43_OFDM_RATE_18MB:
- return B43_OFDM_RATE_12MB;
- case B43_OFDM_RATE_24MB:
- return B43_OFDM_RATE_18MB;
- case B43_OFDM_RATE_36MB:
- return B43_OFDM_RATE_24MB;
- case B43_OFDM_RATE_48MB:
- return B43_OFDM_RATE_36MB;
- case B43_OFDM_RATE_54MB:
- return B43_OFDM_RATE_48MB;
- }
- B43_WARN_ON(1);
- return 0;
-}
-
-static void generate_txhdr_fw4(struct b43_wldev *dev,
- struct b43_txhdr_fw4 *txhdr,
- const unsigned char *fragment_data,
- unsigned int fragment_len,
- const struct ieee80211_tx_control *txctl,
- u16 cookie)
-{
- const struct b43_phy *phy = &dev->phy;
- const struct ieee80211_hdr *wlhdr =
- (const struct ieee80211_hdr *)fragment_data;
- int use_encryption = (!(txctl->flags & IEEE80211_TXCTL_DO_NOT_ENCRYPT));
- u16 fctl = le16_to_cpu(wlhdr->frame_control);
- u8 rate, rate_fb;
- int rate_ofdm, rate_fb_ofdm;
- unsigned int plcp_fragment_len;
- u32 mac_ctl = 0;
- u16 phy_ctl = 0;
- u8 extra_ft = 0;
-
- memset(txhdr, 0, sizeof(*txhdr));
-
- rate = txctl->tx_rate;
- rate_ofdm = b43_is_ofdm_rate(rate);
- rate_fb = (txctl->alt_retry_rate == -1) ? rate : txctl->alt_retry_rate;
- rate_fb_ofdm = b43_is_ofdm_rate(rate_fb);
-
- if (rate_ofdm)
- txhdr->phy_rate = b43_plcp_get_ratecode_ofdm(rate);
- else
- txhdr->phy_rate = b43_plcp_get_ratecode_cck(rate);
- txhdr->mac_frame_ctl = wlhdr->frame_control;
- memcpy(txhdr->tx_receiver, wlhdr->addr1, 6);
-
- /* Calculate duration for fallback rate */
- if ((rate_fb == rate) ||
- (wlhdr->duration_id & cpu_to_le16(0x8000)) ||
- (wlhdr->duration_id == cpu_to_le16(0))) {
- /* If the fallback rate equals the normal rate or the
- * dur_id field contains an AID, CFP magic or 0,
- * use the original dur_id field. */
- txhdr->dur_fb = wlhdr->duration_id;
- } else {
- int fbrate_base100kbps = B43_RATE_TO_BASE100KBPS(rate_fb);
- txhdr->dur_fb = ieee80211_generic_frame_duration(dev->wl->hw,
- dev->wl->if_id,
- fragment_len,
- fbrate_base100kbps);
- }
-
- plcp_fragment_len = fragment_len + FCS_LEN;
- if (use_encryption) {
- u8 key_idx = (u16) (txctl->key_idx);
- struct b43_key *key;
- int wlhdr_len;
- size_t iv_len;
-
- B43_WARN_ON(key_idx >= dev->max_nr_keys);
- key = &(dev->key[key_idx]);
- B43_WARN_ON(!key->keyconf);
-
- /* Hardware appends ICV. */
- plcp_fragment_len += txctl->icv_len;
-
- key_idx = b43_kidx_to_fw(dev, key_idx);
- mac_ctl |= (key_idx << B43_TX4_MAC_KEYIDX_SHIFT) &
- B43_TX4_MAC_KEYIDX;
- mac_ctl |= (key->algorithm << B43_TX4_MAC_KEYALG_SHIFT) &
- B43_TX4_MAC_KEYALG;
- wlhdr_len = ieee80211_get_hdrlen(fctl);
- iv_len = min((size_t) txctl->iv_len,
- ARRAY_SIZE(txhdr->iv));
- memcpy(txhdr->iv, ((u8 *) wlhdr) + wlhdr_len, iv_len);
- }
- b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp),
- plcp_fragment_len, rate);
- b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->plcp_fb),
- plcp_fragment_len, rate_fb);
-
- /* Extra Frame Types */
- if (rate_fb_ofdm)
- extra_ft |= B43_TX4_EFT_FBOFDM;
-
- /* Set channel radio code. Note that the micrcode ORs 0x100 to
- * this value before comparing it to the value in SHM, if this
- * is a 5Ghz packet.
- */
- txhdr->chan_radio_code = phy->channel;
-
- /* PHY TX Control word */
- if (rate_ofdm)
- phy_ctl |= B43_TX4_PHY_OFDM;
- if (dev->short_preamble)
- phy_ctl |= B43_TX4_PHY_SHORTPRMBL;
- switch (txctl->antenna_sel_tx) {
- case 0:
- phy_ctl |= B43_TX4_PHY_ANTLAST;
- break;
- case 1:
- phy_ctl |= B43_TX4_PHY_ANT0;
- break;
- case 2:
- phy_ctl |= B43_TX4_PHY_ANT1;
- break;
- default:
- B43_WARN_ON(1);
- }
-
- /* MAC control */
- if (!(txctl->flags & IEEE80211_TXCTL_NO_ACK))
- mac_ctl |= B43_TX4_MAC_ACK;
- if (!(((fctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_CTL) &&
- ((fctl & IEEE80211_FCTL_STYPE) == IEEE80211_STYPE_PSPOLL)))
- mac_ctl |= B43_TX4_MAC_HWSEQ;
- if (txctl->flags & IEEE80211_TXCTL_FIRST_FRAGMENT)
- mac_ctl |= B43_TX4_MAC_STMSDU;
- if (phy->type == B43_PHYTYPE_A)
- mac_ctl |= B43_TX4_MAC_5GHZ;
-
- /* Generate the RTS or CTS-to-self frame */
- if ((txctl->flags & IEEE80211_TXCTL_USE_RTS_CTS) ||
- (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)) {
- unsigned int len;
- struct ieee80211_hdr *hdr;
- int rts_rate, rts_rate_fb;
- int rts_rate_ofdm, rts_rate_fb_ofdm;
-
- rts_rate = txctl->rts_cts_rate;
- rts_rate_ofdm = b43_is_ofdm_rate(rts_rate);
- rts_rate_fb = b43_calc_fallback_rate(rts_rate);
- rts_rate_fb_ofdm = b43_is_ofdm_rate(rts_rate_fb);
-
- if (txctl->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
- ieee80211_ctstoself_get(dev->wl->hw, dev->wl->if_id,
- fragment_data, fragment_len,
- txctl,
- (struct ieee80211_cts *)(txhdr->
- rts_frame));
- mac_ctl |= B43_TX4_MAC_SENDCTS;
- len = sizeof(struct ieee80211_cts);
- } else {
- ieee80211_rts_get(dev->wl->hw, dev->wl->if_id,
- fragment_data, fragment_len, txctl,
- (struct ieee80211_rts *)(txhdr->
- rts_frame));
- mac_ctl |= B43_TX4_MAC_SENDRTS;
- len = sizeof(struct ieee80211_rts);
- }
- len += FCS_LEN;
- b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
- rts_plcp), len,
- rts_rate);
- b43_generate_plcp_hdr((struct b43_plcp_hdr4 *)(&txhdr->
- rts_plcp_fb),
- len, rts_rate_fb);
- hdr = (struct ieee80211_hdr *)(&txhdr->rts_frame);
- txhdr->rts_dur_fb = hdr->duration_id;
- if (rts_rate_ofdm) {
- extra_ft |= B43_TX4_EFT_RTSOFDM;
- txhdr->phy_rate_rts =
- b43_plcp_get_ratecode_ofdm(rts_rate);
- } else
- txhdr->phy_rate_rts =
- b43_plcp_get_ratecode_cck(rts_rate);
- if (rts_rate_fb_ofdm)
- extra_ft |= B43_TX4_EFT_RTSFBOFDM;
- mac_ctl |= B43_TX4_MAC_LONGFRAME;
- }
-
- /* Magic cookie */
- txhdr->cookie = cpu_to_le16(cookie);
-
- /* Apply the bitfields */
- txhdr->mac_ctl = cpu_to_le32(mac_ctl);
- txhdr->phy_ctl = cpu_to_le16(phy_ctl);
- txhdr->extra_ft = extra_ft;
-}
-
-void b43_generate_txhdr(struct b43_wldev *dev,
- u8 * txhdr,
- const unsigned char *fragment_data,
- unsigned int fragment_len,
- const struct ieee80211_tx_control *txctl, u16 cookie)
-{
- generate_txhdr_fw4(dev, (struct b43_txhdr_fw4 *)txhdr,
- fragment_data, fragment_len, txctl, cookie);
-}
-
-static s8 b43_rssi_postprocess(struct b43_wldev *dev,
- u8 in_rssi, int ofdm,
- int adjust_2053, int adjust_2050)
-{
- struct b43_phy *phy = &dev->phy;
- s32 tmp;
-
- switch (phy->radio_ver) {
- case 0x2050:
- if (ofdm) {
- tmp = in_rssi;
- if (tmp > 127)
- tmp -= 256;
- tmp *= 73;
- tmp /= 64;
- if (adjust_2050)
- tmp += 25;
- else
- tmp -= 3;
- } else {
- if (dev->dev->bus->sprom.r1.
- boardflags_lo & B43_BFL_RSSI) {
- if (in_rssi > 63)
- in_rssi = 63;
- tmp = phy->nrssi_lt[in_rssi];
- tmp = 31 - tmp;
- tmp *= -131;
- tmp /= 128;
- tmp -= 57;
- } else {
- tmp = in_rssi;
- tmp = 31 - tmp;
- tmp *= -149;
- tmp /= 128;
- tmp -= 68;
- }
- if (phy->type == B43_PHYTYPE_G && adjust_2050)
- tmp += 25;
- }
- break;
- case 0x2060:
- if (in_rssi > 127)
- tmp = in_rssi - 256;
- else
- tmp = in_rssi;
- break;
- default:
- tmp = in_rssi;
- tmp -= 11;
- tmp *= 103;
- tmp /= 64;
- if (adjust_2053)
- tmp -= 109;
- else
- tmp -= 83;
- }
-
- return (s8) tmp;
-}
-
-//TODO
-#if 0
-static s8 b43_rssinoise_postprocess(struct b43_wldev *dev, u8 in_rssi)
-{
- struct b43_phy *phy = &dev->phy;
- s8 ret;
-
- if (phy->type == B43_PHYTYPE_A) {
- //TODO: Incomplete specs.
- ret = 0;
- } else
- ret = b43_rssi_postprocess(dev, in_rssi, 0, 1, 1);
-
- return ret;
-}
-#endif
-
-void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr)
-{
- struct ieee80211_rx_status status;
- struct b43_plcp_hdr6 *plcp;
- struct ieee80211_hdr *wlhdr;
- const struct b43_rxhdr_fw4 *rxhdr = _rxhdr;
- u16 fctl;
- u16 phystat0, phystat3, chanstat, mactime;
- u32 macstat;
- u16 chanid;
- u8 jssi;
- int padding;
-
- memset(&status, 0, sizeof(status));
-
- /* Get metadata about the frame from the header. */
- phystat0 = le16_to_cpu(rxhdr->phy_status0);
- phystat3 = le16_to_cpu(rxhdr->phy_status3);
- jssi = rxhdr->jssi;
- macstat = le32_to_cpu(rxhdr->mac_status);
- mactime = le16_to_cpu(rxhdr->mac_time);
- chanstat = le16_to_cpu(rxhdr->channel);
-
- if (macstat & B43_RX_MAC_FCSERR)
- dev->wl->ieee_stats.dot11FCSErrorCount++;
- if (macstat & B43_RX_MAC_DECERR) {
- /* Decryption with the given key failed.
- * Drop the packet. We also won't be able to decrypt it with
- * the key in software. */
- goto drop;
- }
-
- /* Skip PLCP and padding */
- padding = (macstat & B43_RX_MAC_PADDING) ? 2 : 0;
- if (unlikely(skb->len < (sizeof(struct b43_plcp_hdr6) + padding))) {
- b43dbg(dev->wl, "RX: Packet size underrun (1)\n");
- goto drop;
- }
- plcp = (struct b43_plcp_hdr6 *)(skb->data + padding);
- skb_pull(skb, sizeof(struct b43_plcp_hdr6) + padding);
- /* The skb contains the Wireless Header + payload data now */
- if (unlikely(skb->len < (2 + 2 + 6 /*minimum hdr */ + FCS_LEN))) {
- b43dbg(dev->wl, "RX: Packet size underrun (2)\n");
- goto drop;
- }
- wlhdr = (struct ieee80211_hdr *)(skb->data);
- fctl = le16_to_cpu(wlhdr->frame_control);
- skb_trim(skb, skb->len - FCS_LEN);
-
- if (macstat & B43_RX_MAC_DEC) {
- unsigned int keyidx;
- int wlhdr_len;
-
- keyidx = ((macstat & B43_RX_MAC_KEYIDX)
- >> B43_RX_MAC_KEYIDX_SHIFT);
- /* We must adjust the key index here. We want the "physical"
- * key index, but the ucode passed it slightly different.
- */
- keyidx = b43_kidx_to_raw(dev, keyidx);
- B43_WARN_ON(keyidx >= dev->max_nr_keys);
-
- if (dev->key[keyidx].algorithm != B43_SEC_ALGO_NONE) {
- wlhdr_len = ieee80211_get_hdrlen(fctl);
- if (unlikely(skb->len < (wlhdr_len + 3))) {
- b43dbg(dev->wl,
- "RX: Packet size underrun (3)\n");
- goto drop;
- }
- status.flag |= RX_FLAG_DECRYPTED;
- }
- }
-
- status.ssi = b43_rssi_postprocess(dev, jssi,
- (phystat0 & B43_RX_PHYST0_OFDM),
- (phystat0 & B43_RX_PHYST0_GAINCTL),
- (phystat3 & B43_RX_PHYST3_TRSTATE));
- status.noise = dev->stats.link_noise;
- /* the next line looks wrong, but is what mac80211 wants */
- status.signal = (jssi * 100) / B43_RX_MAX_SSI;
- if (phystat0 & B43_RX_PHYST0_OFDM)
- status.rate = b43_plcp_get_bitrate_ofdm(plcp);
- else
- status.rate = b43_plcp_get_bitrate_cck(plcp);
- status.antenna = !!(phystat0 & B43_RX_PHYST0_ANT);
- status.mactime = mactime;
-
- chanid = (chanstat & B43_RX_CHAN_ID) >> B43_RX_CHAN_ID_SHIFT;
- switch (chanstat & B43_RX_CHAN_PHYTYPE) {
- case B43_PHYTYPE_A:
- status.phymode = MODE_IEEE80211A;
- status.freq = chanid;
- status.channel = b43_freq_to_channel_a(chanid);
- break;
- case B43_PHYTYPE_B:
- status.phymode = MODE_IEEE80211B;
- status.freq = chanid + 2400;
- status.channel = b43_freq_to_channel_bg(chanid + 2400);
- break;
- case B43_PHYTYPE_G:
- status.phymode = MODE_IEEE80211G;
- status.freq = chanid + 2400;
- status.channel = b43_freq_to_channel_bg(chanid + 2400);
- break;
- default:
- B43_WARN_ON(1);
- }
-
- dev->stats.last_rx = jiffies;
- ieee80211_rx_irqsafe(dev->wl->hw, skb, &status);
-
- return;
-drop:
- b43dbg(dev->wl, "RX: Packet dropped\n");
- dev_kfree_skb_any(skb);
-}
-
-void b43_handle_txstatus(struct b43_wldev *dev,
- const struct b43_txstatus *status)
-{
- b43_debugfs_log_txstat(dev, status);
-
- if (status->intermediate)
- return;
- if (status->for_ampdu)
- return;
- if (!status->acked)
- dev->wl->ieee_stats.dot11ACKFailureCount++;
- if (status->rts_count) {
- if (status->rts_count == 0xF) //FIXME
- dev->wl->ieee_stats.dot11RTSFailureCount++;
- else
- dev->wl->ieee_stats.dot11RTSSuccessCount++;
- }
-
- if (b43_using_pio(dev))
- b43_pio_handle_txstatus(dev, status);
- else
- b43_dma_handle_txstatus(dev, status);
-}
-
-/* Handle TX status report as received through DMA/PIO queues */
-void b43_handle_hwtxstatus(struct b43_wldev *dev,
- const struct b43_hwtxstatus *hw)
-{
- struct b43_txstatus status;
- u8 tmp;
-
- status.cookie = le16_to_cpu(hw->cookie);
- status.seq = le16_to_cpu(hw->seq);
- status.phy_stat = hw->phy_stat;
- tmp = hw->count;
- status.frame_count = (tmp >> 4);
- status.rts_count = (tmp & 0x0F);
- tmp = hw->flags;
- status.supp_reason = ((tmp & 0x1C) >> 2);
- status.pm_indicated = !!(tmp & 0x80);
- status.intermediate = !!(tmp & 0x40);
- status.for_ampdu = !!(tmp & 0x20);
- status.acked = !!(tmp & 0x02);
-
- b43_handle_txstatus(dev, &status);
-}
-
-/* Stop any TX operation on the device (suspend the hardware queues) */
-void b43_tx_suspend(struct b43_wldev *dev)
-{
- if (b43_using_pio(dev))
- b43_pio_freeze_txqueues(dev);
- else
- b43_dma_tx_suspend(dev);
-}
-
-/* Resume any TX operation on the device (resume the hardware queues) */
-void b43_tx_resume(struct b43_wldev *dev)
-{
- if (b43_using_pio(dev))
- b43_pio_thaw_txqueues(dev);
- else
- b43_dma_tx_resume(dev);
-}
-
-#if 0
-static void upload_qos_parms(struct b43_wldev *dev,
- const u16 * parms, u16 offset)
-{
- int i;
-
- for (i = 0; i < B43_NR_QOSPARMS; i++) {
- b43_shm_write16(dev, B43_SHM_SHARED,
- offset + (i * 2), parms[i]);
- }
-}
-#endif
-
-/* Initialize the QoS parameters */
-void b43_qos_init(struct b43_wldev *dev)
-{
- /* FIXME: This function must probably be called from the mac80211
- * config callback. */
- return;
-
- b43_hf_write(dev, b43_hf_read(dev) | B43_HF_EDCF);
- //FIXME kill magic
- b43_write16(dev, 0x688, b43_read16(dev, 0x688) | 0x4);
-
- /*TODO: We might need some stack support here to get the values. */
-}
projects / openwrt / svn-archive / archive.git / blobdiff