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 <mb@bu3sch.de>
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"
38 int b43_phy_allocate(struct b43_wldev *dev)
40 struct b43_phy *phy = &(dev->phy);
47 phy->ops = &b43_phyops_a;
50 phy->ops = &b43_phyops_g;
53 #ifdef CONFIG_B43_NPHY
54 phy->ops = &b43_phyops_n;
58 #ifdef CONFIG_B43_PHY_LP
59 phy->ops = &b43_phyops_lp;
63 if (B43_WARN_ON(!phy->ops))
66 err = phy->ops->allocate(dev);
73 void b43_phy_free(struct b43_wldev *dev)
75 dev->phy.ops->free(dev);
79 int b43_phy_init(struct b43_wldev *dev)
81 struct b43_phy *phy = &dev->phy;
82 const struct b43_phy_operations *ops = phy->ops;
85 phy->channel = ops->get_default_chan(dev);
87 ops->software_rfkill(dev, RFKILL_STATE_UNBLOCKED);
90 b43err(dev->wl, "PHY init failed\n");
93 /* Make sure to switch hardware and firmware (SHM) to
94 * the default channel. */
95 err = b43_switch_channel(dev, ops->get_default_chan(dev));
97 b43err(dev->wl, "PHY init: Channel switch to default failed\n");
107 ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
112 void b43_phy_exit(struct b43_wldev *dev)
114 const struct b43_phy_operations *ops = dev->phy.ops;
116 ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
121 bool b43_has_hardware_pctl(struct b43_wldev *dev)
123 if (!dev->phy.hardware_power_control)
125 if (!dev->phy.ops->supports_hwpctl)
127 return dev->phy.ops->supports_hwpctl(dev);
130 void b43_radio_lock(struct b43_wldev *dev)
135 B43_WARN_ON(dev->phy.radio_locked);
136 dev->phy.radio_locked = 1;
139 macctl = b43_read32(dev, B43_MMIO_MACCTL);
140 macctl |= B43_MACCTL_RADIOLOCK;
141 b43_write32(dev, B43_MMIO_MACCTL, macctl);
142 /* Commit the write and wait for the firmware
143 * to finish any radio register access. */
144 b43_read32(dev, B43_MMIO_MACCTL);
148 void b43_radio_unlock(struct b43_wldev *dev)
153 B43_WARN_ON(!dev->phy.radio_locked);
154 dev->phy.radio_locked = 0;
157 /* Commit any write */
158 b43_read16(dev, B43_MMIO_PHY_VER);
160 macctl = b43_read32(dev, B43_MMIO_MACCTL);
161 macctl &= ~B43_MACCTL_RADIOLOCK;
162 b43_write32(dev, B43_MMIO_MACCTL, macctl);
165 void b43_phy_lock(struct b43_wldev *dev)
168 B43_WARN_ON(dev->phy.phy_locked);
169 dev->phy.phy_locked = 1;
171 B43_WARN_ON(dev->dev->id.revision < 3);
173 if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
174 b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
177 void b43_phy_unlock(struct b43_wldev *dev)
180 B43_WARN_ON(!dev->phy.phy_locked);
181 dev->phy.phy_locked = 0;
183 B43_WARN_ON(dev->dev->id.revision < 3);
185 if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
186 b43_power_saving_ctl_bits(dev, 0);
189 static inline void assert_mac_suspended(struct b43_wldev *dev)
193 if ((b43_status(dev) >= B43_STAT_INITIALIZED) &&
194 (dev->mac_suspended <= 0)) {
195 b43dbg(dev->wl, "PHY/RADIO register access with "
201 u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
203 assert_mac_suspended(dev);
204 return dev->phy.ops->radio_read(dev, reg);
207 void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
209 assert_mac_suspended(dev);
210 dev->phy.ops->radio_write(dev, reg, value);
213 void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask)
215 b43_radio_write16(dev, offset,
216 b43_radio_read16(dev, offset) & mask);
219 void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set)
221 b43_radio_write16(dev, offset,
222 b43_radio_read16(dev, offset) | set);
225 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
227 b43_radio_write16(dev, offset,
228 (b43_radio_read16(dev, offset) & mask) | set);
231 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
233 assert_mac_suspended(dev);
234 return dev->phy.ops->phy_read(dev, reg);
237 void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
239 assert_mac_suspended(dev);
240 dev->phy.ops->phy_write(dev, reg, value);
243 void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
245 b43_phy_write(dev, offset,
246 b43_phy_read(dev, offset) & mask);
249 void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
251 b43_phy_write(dev, offset,
252 b43_phy_read(dev, offset) | set);
255 void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
257 b43_phy_write(dev, offset,
258 (b43_phy_read(dev, offset) & mask) | set);
261 int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
263 struct b43_phy *phy = &(dev->phy);
264 u16 channelcookie, savedcookie;
267 if (new_channel == B43_DEFAULT_CHANNEL)
268 new_channel = phy->ops->get_default_chan(dev);
270 /* First we set the channel radio code to prevent the
271 * firmware from sending ghost packets.
273 channelcookie = new_channel;
274 if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
275 channelcookie |= 0x100;
276 //FIXME set 40Mhz flag if required
277 savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
278 b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);
280 /* Now try to switch the PHY hardware channel. */
281 err = phy->ops->switch_channel(dev, new_channel);
283 goto err_restore_cookie;
285 dev->phy.channel = new_channel;
286 /* Wait for the radio to tune to the channel and stabilize. */
292 b43_shm_write16(dev, B43_SHM_SHARED,
293 B43_SHM_SH_CHAN, savedcookie);
298 void b43_software_rfkill(struct b43_wldev *dev, enum rfkill_state state)
300 struct b43_phy *phy = &dev->phy;
302 if (state == RFKILL_STATE_HARD_BLOCKED) {
303 /* We cannot hardware-block the device */
304 state = RFKILL_STATE_SOFT_BLOCKED;
307 b43_mac_suspend(dev);
308 phy->ops->software_rfkill(dev, state);
309 phy->radio_on = (state == RFKILL_STATE_UNBLOCKED);
314 * b43_phy_txpower_adjust_work - TX power workqueue.
316 * Workqueue for updating the TX power parameters in hardware.
318 void b43_phy_txpower_adjust_work(struct work_struct *work)
320 struct b43_wl *wl = container_of(work, struct b43_wl,
321 txpower_adjust_work);
322 struct b43_wldev *dev;
324 mutex_lock(&wl->mutex);
325 dev = wl->current_dev;
327 if (likely(dev && (b43_status(dev) >= B43_STAT_STARTED)))
328 dev->phy.ops->adjust_txpower(dev);
330 mutex_unlock(&wl->mutex);
333 /* Called with wl->irq_lock locked */
334 void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags)
336 struct b43_phy *phy = &dev->phy;
337 unsigned long now = jiffies;
338 enum b43_txpwr_result result;
340 if (!(flags & B43_TXPWR_IGNORE_TIME)) {
341 /* Check if it's time for a TXpower check. */
342 if (time_before(now, phy->next_txpwr_check_time))
343 return; /* Not yet */
345 /* The next check will be needed in two seconds, or later. */
346 phy->next_txpwr_check_time = round_jiffies(now + (HZ * 2));
348 if ((dev->dev->bus->boardinfo.vendor == SSB_BOARDVENDOR_BCM) &&
349 (dev->dev->bus->boardinfo.type == SSB_BOARD_BU4306))
350 return; /* No software txpower adjustment needed */
352 result = phy->ops->recalc_txpower(dev, !!(flags & B43_TXPWR_IGNORE_TSSI));
353 if (result == B43_TXPWR_RES_DONE)
354 return; /* We are done. */
355 B43_WARN_ON(result != B43_TXPWR_RES_NEED_ADJUST);
356 B43_WARN_ON(phy->ops->adjust_txpower == NULL);
358 /* We must adjust the transmission power in hardware.
359 * Schedule b43_phy_txpower_adjust_work(). */
360 queue_work(dev->wl->hw->workqueue, &dev->wl->txpower_adjust_work);
363 int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset)
365 const bool is_ofdm = (shm_offset != B43_SHM_SH_TSSI_CCK);
366 unsigned int a, b, c, d;
367 unsigned int average;
370 tmp = b43_shm_read32(dev, B43_SHM_SHARED, shm_offset);
372 b = (tmp >> 8) & 0xFF;
373 c = (tmp >> 16) & 0xFF;
374 d = (tmp >> 24) & 0xFF;
375 if (a == 0 || a == B43_TSSI_MAX ||
376 b == 0 || b == B43_TSSI_MAX ||
377 c == 0 || c == B43_TSSI_MAX ||
378 d == 0 || d == B43_TSSI_MAX)
380 /* The values are OK. Clear them. */
381 tmp = B43_TSSI_MAX | (B43_TSSI_MAX << 8) |
382 (B43_TSSI_MAX << 16) | (B43_TSSI_MAX << 24);
383 b43_shm_write32(dev, B43_SHM_SHARED, shm_offset, tmp);
392 /* Get the average of the values with 0.5 added to each value. */
393 average = (a + b + c + d + 2) / 4;
395 /* Adjust for CCK-boost */
396 if (b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTFLO)
398 average = (average >= 13) ? (average - 13) : 0;
404 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on)
406 b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);