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_operations_setup(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 int b43_phy_init(struct b43_wldev *dev)
75 struct b43_phy *phy = &dev->phy;
76 const struct b43_phy_operations *ops = phy->ops;
79 phy->channel = ops->get_default_chan(dev);
81 ops->software_rfkill(dev, RFKILL_STATE_UNBLOCKED);
84 b43err(dev->wl, "PHY init failed\n");
87 /* Make sure to switch hardware and firmware (SHM) to
88 * the default channel. */
89 err = b43_switch_channel(dev, ops->get_default_chan(dev));
91 b43err(dev->wl, "PHY init: Channel switch to default failed\n");
101 ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
106 void b43_phy_exit(struct b43_wldev *dev)
108 const struct b43_phy_operations *ops = dev->phy.ops;
110 ops->software_rfkill(dev, RFKILL_STATE_SOFT_BLOCKED);
115 bool b43_has_hardware_pctl(struct b43_wldev *dev)
117 if (!dev->phy.hardware_power_control)
119 if (!dev->phy.ops->supports_hwpctl)
121 return dev->phy.ops->supports_hwpctl(dev);
124 void b43_radio_lock(struct b43_wldev *dev)
128 macctl = b43_read32(dev, B43_MMIO_MACCTL);
129 B43_WARN_ON(macctl & B43_MACCTL_RADIOLOCK);
130 macctl |= B43_MACCTL_RADIOLOCK;
131 b43_write32(dev, B43_MMIO_MACCTL, macctl);
132 /* Commit the write and wait for the device
133 * to exit any radio register access. */
134 b43_read32(dev, B43_MMIO_MACCTL);
138 void b43_radio_unlock(struct b43_wldev *dev)
142 /* Commit any write */
143 b43_read16(dev, B43_MMIO_PHY_VER);
145 macctl = b43_read32(dev, B43_MMIO_MACCTL);
146 B43_WARN_ON(!(macctl & B43_MACCTL_RADIOLOCK));
147 macctl &= ~B43_MACCTL_RADIOLOCK;
148 b43_write32(dev, B43_MMIO_MACCTL, macctl);
151 void b43_phy_lock(struct b43_wldev *dev)
154 B43_WARN_ON(dev->phy.phy_locked);
155 dev->phy.phy_locked = 1;
157 B43_WARN_ON(dev->dev->id.revision < 3);
159 if (!b43_is_mode(dev->wl, IEEE80211_IF_TYPE_AP))
160 b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
163 void b43_phy_unlock(struct b43_wldev *dev)
166 B43_WARN_ON(!dev->phy.phy_locked);
167 dev->phy.phy_locked = 0;
169 B43_WARN_ON(dev->dev->id.revision < 3);
171 if (!b43_is_mode(dev->wl, IEEE80211_IF_TYPE_AP))
172 b43_power_saving_ctl_bits(dev, 0);
175 u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
177 return dev->phy.ops->radio_read(dev, reg);
180 void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
182 dev->phy.ops->radio_write(dev, reg, value);
185 void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask)
187 b43_radio_write16(dev, offset,
188 b43_radio_read16(dev, offset) & mask);
191 void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set)
193 b43_radio_write16(dev, offset,
194 b43_radio_read16(dev, offset) | set);
197 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
199 b43_radio_write16(dev, offset,
200 (b43_radio_read16(dev, offset) & mask) | set);
203 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
205 return dev->phy.ops->phy_read(dev, reg);
208 void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
210 dev->phy.ops->phy_write(dev, reg, value);
213 void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
215 b43_phy_write(dev, offset,
216 b43_phy_read(dev, offset) & mask);
219 void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
221 b43_phy_write(dev, offset,
222 b43_phy_read(dev, offset) | set);
225 void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
227 b43_phy_write(dev, offset,
228 (b43_phy_read(dev, offset) & mask) | set);
231 int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
233 struct b43_phy *phy = &(dev->phy);
234 u16 channelcookie, savedcookie;
237 if (new_channel == B43_DEFAULT_CHANNEL)
238 new_channel = phy->ops->get_default_chan(dev);
240 /* First we set the channel radio code to prevent the
241 * firmware from sending ghost packets.
243 channelcookie = new_channel;
244 if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
245 channelcookie |= 0x100;
246 //FIXME set 40Mhz flag if required
247 savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
248 b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);
250 /* Now try to switch the PHY hardware channel. */
251 err = phy->ops->switch_channel(dev, new_channel);
253 goto err_restore_cookie;
255 dev->phy.channel = new_channel;
256 /* Wait for the radio to tune to the channel and stabilize. */
262 b43_shm_write16(dev, B43_SHM_SHARED,
263 B43_SHM_SH_CHAN, savedcookie);
268 void b43_software_rfkill(struct b43_wldev *dev, enum rfkill_state state)
270 struct b43_phy *phy = &dev->phy;
272 if (state == RFKILL_STATE_HARD_BLOCKED) {
273 /* We cannot hardware-block the device */
274 state = RFKILL_STATE_SOFT_BLOCKED;
277 phy->ops->software_rfkill(dev, state);
278 phy->radio_on = (state == RFKILL_STATE_UNBLOCKED);
282 * b43_phy_txpower_adjust_work - TX power workqueue.
284 * Workqueue for updating the TX power parameters in hardware.
286 void b43_phy_txpower_adjust_work(struct work_struct *work)
288 struct b43_wl *wl = container_of(work, struct b43_wl,
289 txpower_adjust_work);
290 struct b43_wldev *dev;
292 mutex_lock(&wl->mutex);
293 dev = wl->current_dev;
295 if (likely(dev && (b43_status(dev) >= B43_STAT_STARTED)))
296 dev->phy.ops->adjust_txpower(dev);
298 mutex_unlock(&wl->mutex);
301 /* Called with wl->irq_lock locked */
302 void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags)
304 struct b43_phy *phy = &dev->phy;
305 unsigned long now = jiffies;
306 enum b43_txpwr_result result;
308 if (!(flags & B43_TXPWR_IGNORE_TIME)) {
309 /* Check if it's time for a TXpower check. */
310 if (time_before(now, phy->next_txpwr_check_time))
311 return; /* Not yet */
313 /* The next check will be needed in two seconds, or later. */
314 phy->next_txpwr_check_time = round_jiffies(now + (HZ * 2));
316 if ((dev->dev->bus->boardinfo.vendor == SSB_BOARDVENDOR_BCM) &&
317 (dev->dev->bus->boardinfo.type == SSB_BOARD_BU4306))
318 return; /* No software txpower adjustment needed */
320 result = phy->ops->recalc_txpower(dev, !!(flags & B43_TXPWR_IGNORE_TSSI));
321 if (result == B43_TXPWR_RES_DONE)
322 return; /* We are done. */
323 B43_WARN_ON(result != B43_TXPWR_RES_NEED_ADJUST);
324 B43_WARN_ON(phy->ops->adjust_txpower == NULL);
326 /* We must adjust the transmission power in hardware.
327 * Schedule b43_phy_txpower_adjust_work(). */
328 queue_work(dev->wl->hw->workqueue, &dev->wl->txpower_adjust_work);
331 int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset)
333 const bool is_ofdm = (shm_offset != B43_SHM_SH_TSSI_CCK);
334 unsigned int a, b, c, d;
335 unsigned int average;
338 tmp = b43_shm_read32(dev, B43_SHM_SHARED, shm_offset);
340 b = (tmp >> 8) & 0xFF;
341 c = (tmp >> 16) & 0xFF;
342 d = (tmp >> 24) & 0xFF;
343 if (a == 0 || a == B43_TSSI_MAX ||
344 b == 0 || b == B43_TSSI_MAX ||
345 c == 0 || c == B43_TSSI_MAX ||
346 d == 0 || d == B43_TSSI_MAX)
348 /* The values are OK. Clear them. */
349 tmp = B43_TSSI_MAX | (B43_TSSI_MAX << 8) |
350 (B43_TSSI_MAX << 16) | (B43_TSSI_MAX << 24);
351 b43_shm_write32(dev, B43_SHM_SHARED, shm_offset, tmp);
360 /* Get the average of the values with 0.5 added to each value. */
361 average = (a + b + c + d + 2) / 4;
363 /* Adjust for CCK-boost */
364 if (b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTFLO)
366 average = (average >= 13) ? (average - 13) : 0;