3 Broadcom B43 wireless driver
6 Copyright (c) 2005 Martin Langer <martin-langer@gmx.de>,
7 Copyright (c) 2005-2007 Stefano Brivio <stefano.brivio@polimi.it>
8 Copyright (c) 2005-2008 Michael Buesch <m@bues.ch>
9 Copyright (c) 2005, 2006 Danny van Dyk <kugelfang@gentoo.org>
10 Copyright (c) 2005, 2006 Andreas Jaggi <andreas.jaggi@waterwave.ch>
12 This program is free software; you can redistribute it and/or modify
13 it under the terms of the GNU General Public License as published by
14 the Free Software Foundation; either version 2 of the License, or
15 (at your option) any later version.
17 This program is distributed in the hope that it will be useful,
18 but WITHOUT ANY WARRANTY; without even the implied warranty of
19 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 GNU General Public License for more details.
22 You should have received a copy of the GNU General Public License
23 along with this program; see the file COPYING. If not, write to
24 the Free Software Foundation, Inc., 51 Franklin Steet, Fifth Floor,
25 Boston, MA 02110-1301, USA.
29 #include "phy_common.h"
40 int b43_phy_allocate(struct b43_wldev *dev)
42 struct b43_phy *phy = &(dev->phy);
49 phy->ops = &b43_phyops_a;
52 phy->ops = &b43_phyops_g;
55 #ifdef CONFIG_B43_PHY_N
56 phy->ops = &b43_phyops_n;
60 #ifdef CONFIG_B43_PHY_LP
61 phy->ops = &b43_phyops_lp;
65 #ifdef CONFIG_B43_PHY_HT
66 phy->ops = &b43_phyops_ht;
70 #ifdef CONFIG_B43_PHY_LCN
71 phy->ops = &b43_phyops_lcn;
75 if (B43_WARN_ON(!phy->ops))
78 err = phy->ops->allocate(dev);
85 void b43_phy_free(struct b43_wldev *dev)
87 dev->phy.ops->free(dev);
91 int b43_phy_init(struct b43_wldev *dev)
93 struct b43_phy *phy = &dev->phy;
94 const struct b43_phy_operations *ops = phy->ops;
97 phy->channel = ops->get_default_chan(dev);
99 phy->ops->switch_analog(dev, true);
100 b43_software_rfkill(dev, false);
101 err = ops->init(dev);
103 b43err(dev->wl, "PHY init failed\n");
106 /* Make sure to switch hardware and firmware (SHM) to
107 * the default channel. */
108 err = b43_switch_channel(dev, ops->get_default_chan(dev));
110 b43err(dev->wl, "PHY init: Channel switch to default failed\n");
120 b43_software_rfkill(dev, true);
125 void b43_phy_exit(struct b43_wldev *dev)
127 const struct b43_phy_operations *ops = dev->phy.ops;
129 b43_software_rfkill(dev, true);
134 bool b43_has_hardware_pctl(struct b43_wldev *dev)
136 if (!dev->phy.hardware_power_control)
138 if (!dev->phy.ops->supports_hwpctl)
140 return dev->phy.ops->supports_hwpctl(dev);
143 void b43_radio_lock(struct b43_wldev *dev)
148 B43_WARN_ON(dev->phy.radio_locked);
149 dev->phy.radio_locked = true;
152 macctl = b43_read32(dev, B43_MMIO_MACCTL);
153 macctl |= B43_MACCTL_RADIOLOCK;
154 b43_write32(dev, B43_MMIO_MACCTL, macctl);
155 /* Commit the write and wait for the firmware
156 * to finish any radio register access. */
157 b43_read32(dev, B43_MMIO_MACCTL);
161 void b43_radio_unlock(struct b43_wldev *dev)
166 B43_WARN_ON(!dev->phy.radio_locked);
167 dev->phy.radio_locked = false;
170 /* Commit any write */
171 b43_read16(dev, B43_MMIO_PHY_VER);
173 macctl = b43_read32(dev, B43_MMIO_MACCTL);
174 macctl &= ~B43_MACCTL_RADIOLOCK;
175 b43_write32(dev, B43_MMIO_MACCTL, macctl);
178 void b43_phy_lock(struct b43_wldev *dev)
181 B43_WARN_ON(dev->phy.phy_locked);
182 dev->phy.phy_locked = true;
184 B43_WARN_ON(dev->dev->core_rev < 3);
186 if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
187 b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
190 void b43_phy_unlock(struct b43_wldev *dev)
193 B43_WARN_ON(!dev->phy.phy_locked);
194 dev->phy.phy_locked = false;
196 B43_WARN_ON(dev->dev->core_rev < 3);
198 if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
199 b43_power_saving_ctl_bits(dev, 0);
202 static inline void assert_mac_suspended(struct b43_wldev *dev)
206 if ((b43_status(dev) >= B43_STAT_INITIALIZED) &&
207 (dev->mac_suspended <= 0)) {
208 b43dbg(dev->wl, "PHY/RADIO register access with "
214 u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
216 assert_mac_suspended(dev);
217 return dev->phy.ops->radio_read(dev, reg);
220 void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
222 assert_mac_suspended(dev);
223 dev->phy.ops->radio_write(dev, reg, value);
226 void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask)
228 b43_radio_write16(dev, offset,
229 b43_radio_read16(dev, offset) & mask);
232 void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set)
234 b43_radio_write16(dev, offset,
235 b43_radio_read16(dev, offset) | set);
238 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
240 b43_radio_write16(dev, offset,
241 (b43_radio_read16(dev, offset) & mask) | set);
244 bool b43_radio_wait_value(struct b43_wldev *dev, u16 offset, u16 mask,
245 u16 value, int delay, int timeout)
250 for (i = 0; i < timeout; i += delay) {
251 val = b43_radio_read(dev, offset);
252 if ((val & mask) == value)
259 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
261 assert_mac_suspended(dev);
262 dev->phy.writes_counter = 0;
263 return dev->phy.ops->phy_read(dev, reg);
266 void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
268 assert_mac_suspended(dev);
269 dev->phy.ops->phy_write(dev, reg, value);
270 if (++dev->phy.writes_counter == B43_MAX_WRITES_IN_ROW) {
271 b43_read16(dev, B43_MMIO_PHY_VER);
272 dev->phy.writes_counter = 0;
276 void b43_phy_copy(struct b43_wldev *dev, u16 destreg, u16 srcreg)
278 assert_mac_suspended(dev);
279 dev->phy.ops->phy_write(dev, destreg,
280 dev->phy.ops->phy_read(dev, srcreg));
283 void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
285 if (dev->phy.ops->phy_maskset) {
286 assert_mac_suspended(dev);
287 dev->phy.ops->phy_maskset(dev, offset, mask, 0);
289 b43_phy_write(dev, offset,
290 b43_phy_read(dev, offset) & mask);
294 void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
296 if (dev->phy.ops->phy_maskset) {
297 assert_mac_suspended(dev);
298 dev->phy.ops->phy_maskset(dev, offset, 0xFFFF, set);
300 b43_phy_write(dev, offset,
301 b43_phy_read(dev, offset) | set);
305 void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
307 if (dev->phy.ops->phy_maskset) {
308 assert_mac_suspended(dev);
309 dev->phy.ops->phy_maskset(dev, offset, mask, set);
311 b43_phy_write(dev, offset,
312 (b43_phy_read(dev, offset) & mask) | set);
316 void b43_phy_put_into_reset(struct b43_wldev *dev)
320 switch (dev->dev->bus_type) {
321 #ifdef CONFIG_B43_BCMA
323 tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
324 tmp &= ~B43_BCMA_IOCTL_GMODE;
325 tmp |= B43_BCMA_IOCTL_PHY_RESET;
326 tmp |= BCMA_IOCTL_FGC;
327 bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
330 tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
331 tmp &= ~BCMA_IOCTL_FGC;
332 bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
336 #ifdef CONFIG_B43_SSB
338 tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
339 tmp &= ~B43_TMSLOW_GMODE;
340 tmp |= B43_TMSLOW_PHYRESET;
341 tmp |= SSB_TMSLOW_FGC;
342 ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
343 usleep_range(1000, 2000);
345 tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
346 tmp &= ~SSB_TMSLOW_FGC;
347 ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
348 usleep_range(1000, 2000);
355 void b43_phy_take_out_of_reset(struct b43_wldev *dev)
359 switch (dev->dev->bus_type) {
360 #ifdef CONFIG_B43_BCMA
362 /* Unset reset bit (with forcing clock) */
363 tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
364 tmp &= ~B43_BCMA_IOCTL_PHY_RESET;
365 tmp &= ~B43_BCMA_IOCTL_PHY_CLKEN;
366 tmp |= BCMA_IOCTL_FGC;
367 bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
370 /* Do not force clock anymore */
371 tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
372 tmp &= ~BCMA_IOCTL_FGC;
373 tmp |= B43_BCMA_IOCTL_PHY_CLKEN;
374 bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
378 #ifdef CONFIG_B43_SSB
380 /* Unset reset bit (with forcing clock) */
381 tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
382 tmp &= ~B43_TMSLOW_PHYRESET;
383 tmp &= ~B43_TMSLOW_PHYCLKEN;
384 tmp |= SSB_TMSLOW_FGC;
385 ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
386 ssb_read32(dev->dev->sdev, SSB_TMSLOW); /* flush */
387 usleep_range(1000, 2000);
389 tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
390 tmp &= ~SSB_TMSLOW_FGC;
391 tmp |= B43_TMSLOW_PHYCLKEN;
392 ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
393 ssb_read32(dev->dev->sdev, SSB_TMSLOW); /* flush */
394 usleep_range(1000, 2000);
400 int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
402 struct b43_phy *phy = &(dev->phy);
403 u16 channelcookie, savedcookie;
406 if (new_channel == B43_DEFAULT_CHANNEL)
407 new_channel = phy->ops->get_default_chan(dev);
409 /* First we set the channel radio code to prevent the
410 * firmware from sending ghost packets.
412 channelcookie = new_channel;
413 if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
414 channelcookie |= B43_SHM_SH_CHAN_5GHZ;
415 /* FIXME: set 40Mhz flag if required */
417 channelcookie |= B43_SHM_SH_CHAN_40MHZ;
418 savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
419 b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);
421 /* Now try to switch the PHY hardware channel. */
422 err = phy->ops->switch_channel(dev, new_channel);
424 goto err_restore_cookie;
426 dev->phy.channel = new_channel;
427 /* Wait for the radio to tune to the channel and stabilize. */
433 b43_shm_write16(dev, B43_SHM_SHARED,
434 B43_SHM_SH_CHAN, savedcookie);
439 void b43_software_rfkill(struct b43_wldev *dev, bool blocked)
441 struct b43_phy *phy = &dev->phy;
443 b43_mac_suspend(dev);
444 phy->ops->software_rfkill(dev, blocked);
445 phy->radio_on = !blocked;
450 * b43_phy_txpower_adjust_work - TX power workqueue.
452 * Workqueue for updating the TX power parameters in hardware.
454 void b43_phy_txpower_adjust_work(struct work_struct *work)
456 struct b43_wl *wl = container_of(work, struct b43_wl,
457 txpower_adjust_work);
458 struct b43_wldev *dev;
460 mutex_lock(&wl->mutex);
461 dev = wl->current_dev;
463 if (likely(dev && (b43_status(dev) >= B43_STAT_STARTED)))
464 dev->phy.ops->adjust_txpower(dev);
466 mutex_unlock(&wl->mutex);
469 void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags)
471 struct b43_phy *phy = &dev->phy;
472 unsigned long now = jiffies;
473 enum b43_txpwr_result result;
475 if (!(flags & B43_TXPWR_IGNORE_TIME)) {
476 /* Check if it's time for a TXpower check. */
477 if (time_before(now, phy->next_txpwr_check_time))
478 return; /* Not yet */
480 /* The next check will be needed in two seconds, or later. */
481 phy->next_txpwr_check_time = round_jiffies(now + (HZ * 2));
483 if ((dev->dev->board_vendor == SSB_BOARDVENDOR_BCM) &&
484 (dev->dev->board_type == SSB_BOARD_BU4306))
485 return; /* No software txpower adjustment needed */
487 result = phy->ops->recalc_txpower(dev, !!(flags & B43_TXPWR_IGNORE_TSSI));
488 if (result == B43_TXPWR_RES_DONE)
489 return; /* We are done. */
490 B43_WARN_ON(result != B43_TXPWR_RES_NEED_ADJUST);
491 B43_WARN_ON(phy->ops->adjust_txpower == NULL);
493 /* We must adjust the transmission power in hardware.
494 * Schedule b43_phy_txpower_adjust_work(). */
495 ieee80211_queue_work(dev->wl->hw, &dev->wl->txpower_adjust_work);
498 int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset)
500 const bool is_ofdm = (shm_offset != B43_SHM_SH_TSSI_CCK);
501 unsigned int a, b, c, d;
502 unsigned int average;
505 tmp = b43_shm_read32(dev, B43_SHM_SHARED, shm_offset);
507 b = (tmp >> 8) & 0xFF;
508 c = (tmp >> 16) & 0xFF;
509 d = (tmp >> 24) & 0xFF;
510 if (a == 0 || a == B43_TSSI_MAX ||
511 b == 0 || b == B43_TSSI_MAX ||
512 c == 0 || c == B43_TSSI_MAX ||
513 d == 0 || d == B43_TSSI_MAX)
515 /* The values are OK. Clear them. */
516 tmp = B43_TSSI_MAX | (B43_TSSI_MAX << 8) |
517 (B43_TSSI_MAX << 16) | (B43_TSSI_MAX << 24);
518 b43_shm_write32(dev, B43_SHM_SHARED, shm_offset, tmp);
527 /* Get the average of the values with 0.5 added to each value. */
528 average = (a + b + c + d + 2) / 4;
530 /* Adjust for CCK-boost */
531 if (b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTF1)
533 average = (average >= 13) ? (average - 13) : 0;
539 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on)
541 b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);
545 bool b43_channel_type_is_40mhz(enum nl80211_channel_type channel_type)
547 return (channel_type == NL80211_CHAN_HT40MINUS ||
548 channel_type == NL80211_CHAN_HT40PLUS);
551 /* http://bcm-v4.sipsolutions.net/802.11/PHY/N/BmacPhyClkFgc */
552 void b43_phy_force_clock(struct b43_wldev *dev, bool force)
556 WARN_ON(dev->phy.type != B43_PHYTYPE_N &&
557 dev->phy.type != B43_PHYTYPE_HT);
559 switch (dev->dev->bus_type) {
560 #ifdef CONFIG_B43_BCMA
562 tmp = bcma_aread32(dev->dev->bdev, BCMA_IOCTL);
564 tmp |= BCMA_IOCTL_FGC;
566 tmp &= ~BCMA_IOCTL_FGC;
567 bcma_awrite32(dev->dev->bdev, BCMA_IOCTL, tmp);
570 #ifdef CONFIG_B43_SSB
572 tmp = ssb_read32(dev->dev->sdev, SSB_TMSLOW);
574 tmp |= SSB_TMSLOW_FGC;
576 tmp &= ~SSB_TMSLOW_FGC;
577 ssb_write32(dev->dev->sdev, SSB_TMSLOW, tmp);
583 /* http://bcm-v4.sipsolutions.net/802.11/PHY/Cordic */
584 struct b43_c32 b43_cordic(int theta)
586 static const u32 arctg[] = {
587 2949120, 1740967, 919879, 466945, 234379, 117304,
588 58666, 29335, 14668, 7334, 3667, 1833,
589 917, 458, 229, 115, 57, 29,
595 struct b43_c32 ret = { .i = 39797, .q = 0, };
597 while (theta > (180 << 16))
598 theta -= (360 << 16);
599 while (theta < -(180 << 16))
600 theta += (360 << 16);
602 if (theta > (90 << 16)) {
603 theta -= (180 << 16);
605 } else if (theta < -(90 << 16)) {
606 theta += (180 << 16);
610 for (i = 0; i <= 17; i++) {
612 tmp = ret.i - (ret.q >> i);
617 tmp = ret.i + (ret.q >> i);