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)
134 macctl = b43_read32(dev, B43_MMIO_MACCTL);
135 B43_WARN_ON(macctl & B43_MACCTL_RADIOLOCK);
136 macctl |= B43_MACCTL_RADIOLOCK;
137 b43_write32(dev, B43_MMIO_MACCTL, macctl);
138 /* Commit the write and wait for the device
139 * to exit any radio register access. */
140 b43_read32(dev, B43_MMIO_MACCTL);
144 void b43_radio_unlock(struct b43_wldev *dev)
148 /* Commit any write */
149 b43_read16(dev, B43_MMIO_PHY_VER);
151 macctl = b43_read32(dev, B43_MMIO_MACCTL);
152 B43_WARN_ON(!(macctl & B43_MACCTL_RADIOLOCK));
153 macctl &= ~B43_MACCTL_RADIOLOCK;
154 b43_write32(dev, B43_MMIO_MACCTL, macctl);
157 void b43_phy_lock(struct b43_wldev *dev)
160 B43_WARN_ON(dev->phy.phy_locked);
161 dev->phy.phy_locked = 1;
163 B43_WARN_ON(dev->dev->id.revision < 3);
165 if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
166 b43_power_saving_ctl_bits(dev, B43_PS_AWAKE);
169 void b43_phy_unlock(struct b43_wldev *dev)
172 B43_WARN_ON(!dev->phy.phy_locked);
173 dev->phy.phy_locked = 0;
175 B43_WARN_ON(dev->dev->id.revision < 3);
177 if (!b43_is_mode(dev->wl, NL80211_IFTYPE_AP))
178 b43_power_saving_ctl_bits(dev, 0);
181 static inline void assert_mac_suspended(struct b43_wldev *dev)
185 if ((b43_status(dev) >= B43_STAT_INITIALIZED) &&
186 (dev->mac_suspended <= 0)) {
187 b43dbg(dev->wl, "PHY/RADIO register access with "
193 u16 b43_radio_read(struct b43_wldev *dev, u16 reg)
195 assert_mac_suspended(dev);
196 return dev->phy.ops->radio_read(dev, reg);
199 void b43_radio_write(struct b43_wldev *dev, u16 reg, u16 value)
201 assert_mac_suspended(dev);
202 dev->phy.ops->radio_write(dev, reg, value);
205 void b43_radio_mask(struct b43_wldev *dev, u16 offset, u16 mask)
207 b43_radio_write16(dev, offset,
208 b43_radio_read16(dev, offset) & mask);
211 void b43_radio_set(struct b43_wldev *dev, u16 offset, u16 set)
213 b43_radio_write16(dev, offset,
214 b43_radio_read16(dev, offset) | set);
217 void b43_radio_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
219 b43_radio_write16(dev, offset,
220 (b43_radio_read16(dev, offset) & mask) | set);
223 u16 b43_phy_read(struct b43_wldev *dev, u16 reg)
225 assert_mac_suspended(dev);
226 return dev->phy.ops->phy_read(dev, reg);
229 void b43_phy_write(struct b43_wldev *dev, u16 reg, u16 value)
231 assert_mac_suspended(dev);
232 dev->phy.ops->phy_write(dev, reg, value);
235 void b43_phy_mask(struct b43_wldev *dev, u16 offset, u16 mask)
237 b43_phy_write(dev, offset,
238 b43_phy_read(dev, offset) & mask);
241 void b43_phy_set(struct b43_wldev *dev, u16 offset, u16 set)
243 b43_phy_write(dev, offset,
244 b43_phy_read(dev, offset) | set);
247 void b43_phy_maskset(struct b43_wldev *dev, u16 offset, u16 mask, u16 set)
249 b43_phy_write(dev, offset,
250 (b43_phy_read(dev, offset) & mask) | set);
253 int b43_switch_channel(struct b43_wldev *dev, unsigned int new_channel)
255 struct b43_phy *phy = &(dev->phy);
256 u16 channelcookie, savedcookie;
259 if (new_channel == B43_DEFAULT_CHANNEL)
260 new_channel = phy->ops->get_default_chan(dev);
262 /* First we set the channel radio code to prevent the
263 * firmware from sending ghost packets.
265 channelcookie = new_channel;
266 if (b43_current_band(dev->wl) == IEEE80211_BAND_5GHZ)
267 channelcookie |= 0x100;
268 //FIXME set 40Mhz flag if required
269 savedcookie = b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN);
270 b43_shm_write16(dev, B43_SHM_SHARED, B43_SHM_SH_CHAN, channelcookie);
272 /* Now try to switch the PHY hardware channel. */
273 err = phy->ops->switch_channel(dev, new_channel);
275 goto err_restore_cookie;
277 dev->phy.channel = new_channel;
278 /* Wait for the radio to tune to the channel and stabilize. */
284 b43_shm_write16(dev, B43_SHM_SHARED,
285 B43_SHM_SH_CHAN, savedcookie);
290 void b43_software_rfkill(struct b43_wldev *dev, enum rfkill_state state)
292 struct b43_phy *phy = &dev->phy;
294 if (state == RFKILL_STATE_HARD_BLOCKED) {
295 /* We cannot hardware-block the device */
296 state = RFKILL_STATE_SOFT_BLOCKED;
299 b43_mac_suspend(dev);
300 phy->ops->software_rfkill(dev, state);
301 phy->radio_on = (state == RFKILL_STATE_UNBLOCKED);
306 * b43_phy_txpower_adjust_work - TX power workqueue.
308 * Workqueue for updating the TX power parameters in hardware.
310 void b43_phy_txpower_adjust_work(struct work_struct *work)
312 struct b43_wl *wl = container_of(work, struct b43_wl,
313 txpower_adjust_work);
314 struct b43_wldev *dev;
316 mutex_lock(&wl->mutex);
317 dev = wl->current_dev;
319 if (likely(dev && (b43_status(dev) >= B43_STAT_STARTED)))
320 dev->phy.ops->adjust_txpower(dev);
322 mutex_unlock(&wl->mutex);
325 /* Called with wl->irq_lock locked */
326 void b43_phy_txpower_check(struct b43_wldev *dev, unsigned int flags)
328 struct b43_phy *phy = &dev->phy;
329 unsigned long now = jiffies;
330 enum b43_txpwr_result result;
332 if (!(flags & B43_TXPWR_IGNORE_TIME)) {
333 /* Check if it's time for a TXpower check. */
334 if (time_before(now, phy->next_txpwr_check_time))
335 return; /* Not yet */
337 /* The next check will be needed in two seconds, or later. */
338 phy->next_txpwr_check_time = round_jiffies(now + (HZ * 2));
340 if ((dev->dev->bus->boardinfo.vendor == SSB_BOARDVENDOR_BCM) &&
341 (dev->dev->bus->boardinfo.type == SSB_BOARD_BU4306))
342 return; /* No software txpower adjustment needed */
344 result = phy->ops->recalc_txpower(dev, !!(flags & B43_TXPWR_IGNORE_TSSI));
345 if (result == B43_TXPWR_RES_DONE)
346 return; /* We are done. */
347 B43_WARN_ON(result != B43_TXPWR_RES_NEED_ADJUST);
348 B43_WARN_ON(phy->ops->adjust_txpower == NULL);
350 /* We must adjust the transmission power in hardware.
351 * Schedule b43_phy_txpower_adjust_work(). */
352 queue_work(dev->wl->hw->workqueue, &dev->wl->txpower_adjust_work);
355 int b43_phy_shm_tssi_read(struct b43_wldev *dev, u16 shm_offset)
357 const bool is_ofdm = (shm_offset != B43_SHM_SH_TSSI_CCK);
358 unsigned int a, b, c, d;
359 unsigned int average;
362 tmp = b43_shm_read32(dev, B43_SHM_SHARED, shm_offset);
364 b = (tmp >> 8) & 0xFF;
365 c = (tmp >> 16) & 0xFF;
366 d = (tmp >> 24) & 0xFF;
367 if (a == 0 || a == B43_TSSI_MAX ||
368 b == 0 || b == B43_TSSI_MAX ||
369 c == 0 || c == B43_TSSI_MAX ||
370 d == 0 || d == B43_TSSI_MAX)
372 /* The values are OK. Clear them. */
373 tmp = B43_TSSI_MAX | (B43_TSSI_MAX << 8) |
374 (B43_TSSI_MAX << 16) | (B43_TSSI_MAX << 24);
375 b43_shm_write32(dev, B43_SHM_SHARED, shm_offset, tmp);
384 /* Get the average of the values with 0.5 added to each value. */
385 average = (a + b + c + d + 2) / 4;
387 /* Adjust for CCK-boost */
388 if (b43_shm_read16(dev, B43_SHM_SHARED, B43_SHM_SH_HOSTFLO)
390 average = (average >= 13) ? (average - 13) : 0;
396 void b43_phyop_switch_analog_generic(struct b43_wldev *dev, bool on)
398 b43_write16(dev, B43_MMIO_PHY0, on ? 0 : 0xF4);