Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
btcoex.c
Go to the documentation of this file.
1 /*
2  * Copyright (c) 2009-2011 Atheros Communications Inc.
3  *
4  * Permission to use, copy, modify, and/or distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <linux/export.h>
18 #include "hw.h"
19 
20 enum ath_bt_mode {
21  ATH_BT_COEX_MODE_LEGACY, /* legacy rx_clear mode */
22  ATH_BT_COEX_MODE_UNSLOTTED, /* untimed/unslotted mode */
23  ATH_BT_COEX_MODE_SLOTTED, /* slotted mode */
24  ATH_BT_COEX_MODE_DISABLED, /* coexistence disabled */
25 };
26 
27 struct ath_btcoex_config {
28  u8 bt_time_extend;
29  bool bt_txstate_extend;
30  bool bt_txframe_extend;
31  enum ath_bt_mode bt_mode; /* coexistence mode */
32  bool bt_quiet_collision;
33  bool bt_rxclear_polarity; /* invert rx_clear as WLAN_ACTIVE*/
34  u8 bt_priority_time;
35  u8 bt_first_slot_time;
36  bool bt_hold_rx_clear;
37 };
38 
39 static const u32 ar9003_wlan_weights[ATH_BTCOEX_STOMP_MAX]
40  [AR9300_NUM_WLAN_WEIGHTS] = {
41  { 0xfffffff0, 0xfffffff0, 0xfffffff0, 0xfffffff0 }, /* STOMP_ALL */
42  { 0x88888880, 0x88888880, 0x88888880, 0x88888880 }, /* STOMP_LOW */
43  { 0x00000000, 0x00000000, 0x00000000, 0x00000000 }, /* STOMP_NONE */
44 };
45 
46 static const u32 mci_wlan_weights[ATH_BTCOEX_STOMP_MAX]
47  [AR9300_NUM_WLAN_WEIGHTS] = {
48  { 0x01017d01, 0x41414101, 0x41414101, 0x41414141 }, /* STOMP_ALL */
49  { 0x01017d01, 0x3b3b3b01, 0x3b3b3b01, 0x3b3b3b3b }, /* STOMP_LOW */
50  { 0x01017d01, 0x01010101, 0x01010101, 0x01010101 }, /* STOMP_NONE */
51  { 0x01017d01, 0x013b0101, 0x3b3b0101, 0x3b3b013b }, /* STOMP_LOW_FTP */
52 };
53 
54 void ath9k_hw_init_btcoex_hw(struct ath_hw *ah, int qnum)
55 {
56  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
57  const struct ath_btcoex_config ath_bt_config = {
58  .bt_time_extend = 0,
59  .bt_txstate_extend = true,
60  .bt_txframe_extend = true,
61  .bt_mode = ATH_BT_COEX_MODE_SLOTTED,
62  .bt_quiet_collision = true,
63  .bt_rxclear_polarity = true,
64  .bt_priority_time = 2,
65  .bt_first_slot_time = 5,
66  .bt_hold_rx_clear = true,
67  };
68  u32 i, idx;
69  bool rxclear_polarity = ath_bt_config.bt_rxclear_polarity;
70 
71  if (AR_SREV_9300_20_OR_LATER(ah))
72  rxclear_polarity = !ath_bt_config.bt_rxclear_polarity;
73 
74  btcoex_hw->bt_coex_mode =
75  (btcoex_hw->bt_coex_mode & AR_BT_QCU_THRESH) |
76  SM(ath_bt_config.bt_time_extend, AR_BT_TIME_EXTEND) |
77  SM(ath_bt_config.bt_txstate_extend, AR_BT_TXSTATE_EXTEND) |
78  SM(ath_bt_config.bt_txframe_extend, AR_BT_TX_FRAME_EXTEND) |
79  SM(ath_bt_config.bt_mode, AR_BT_MODE) |
80  SM(ath_bt_config.bt_quiet_collision, AR_BT_QUIET) |
81  SM(rxclear_polarity, AR_BT_RX_CLEAR_POLARITY) |
82  SM(ath_bt_config.bt_priority_time, AR_BT_PRIORITY_TIME) |
83  SM(ath_bt_config.bt_first_slot_time, AR_BT_FIRST_SLOT_TIME) |
84  SM(qnum, AR_BT_QCU_THRESH);
85 
86  btcoex_hw->bt_coex_mode2 =
87  SM(ath_bt_config.bt_hold_rx_clear, AR_BT_HOLD_RX_CLEAR) |
88  SM(ATH_BTCOEX_BMISS_THRESH, AR_BT_BCN_MISS_THRESH) |
89  AR_BT_DISABLE_BT_ANT;
90 
91  for (i = 0; i < 32; i++) {
92  idx = (debruijn32 << i) >> 27;
93  ah->hw_gen_timers.gen_timer_index[idx] = i;
94  }
95 }
96 EXPORT_SYMBOL(ath9k_hw_init_btcoex_hw);
97 
98 void ath9k_hw_btcoex_init_scheme(struct ath_hw *ah)
99 {
100  struct ath_common *common = ath9k_hw_common(ah);
101  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
102 
103  /*
104  * Check if BTCOEX is globally disabled.
105  */
106  if (!common->btcoex_enabled) {
107  btcoex_hw->scheme = ATH_BTCOEX_CFG_NONE;
108  return;
109  }
110 
111  if (AR_SREV_9300_20_OR_LATER(ah)) {
112  btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
113  btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9300;
114  btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9300;
115  btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9300;
116  } else if (AR_SREV_9280_20_OR_LATER(ah)) {
117  btcoex_hw->btactive_gpio = ATH_BTACTIVE_GPIO_9280;
118  btcoex_hw->wlanactive_gpio = ATH_WLANACTIVE_GPIO_9280;
119 
120  if (AR_SREV_9285(ah)) {
121  btcoex_hw->scheme = ATH_BTCOEX_CFG_3WIRE;
122  btcoex_hw->btpriority_gpio = ATH_BTPRIORITY_GPIO_9285;
123  } else {
124  btcoex_hw->scheme = ATH_BTCOEX_CFG_2WIRE;
125  }
126  }
127 }
128 EXPORT_SYMBOL(ath9k_hw_btcoex_init_scheme);
129 
130 void ath9k_hw_btcoex_init_2wire(struct ath_hw *ah)
131 {
132  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
133 
134  /* connect bt_active to baseband */
135  REG_CLR_BIT(ah, AR_GPIO_INPUT_EN_VAL,
136  (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_DEF |
137  AR_GPIO_INPUT_EN_VAL_BT_FREQUENCY_DEF));
138 
139  REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
140  AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB);
141 
142  /* Set input mux for bt_active to gpio pin */
143  REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
144  AR_GPIO_INPUT_MUX1_BT_ACTIVE,
145  btcoex_hw->btactive_gpio);
146 
147  /* Configure the desired gpio port for input */
148  ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
149 }
150 EXPORT_SYMBOL(ath9k_hw_btcoex_init_2wire);
151 
152 void ath9k_hw_btcoex_init_3wire(struct ath_hw *ah)
153 {
154  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
155 
156  /* btcoex 3-wire */
157  REG_SET_BIT(ah, AR_GPIO_INPUT_EN_VAL,
158  (AR_GPIO_INPUT_EN_VAL_BT_PRIORITY_BB |
159  AR_GPIO_INPUT_EN_VAL_BT_ACTIVE_BB));
160 
161  /* Set input mux for bt_prority_async and
162  * bt_active_async to GPIO pins */
163  REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
164  AR_GPIO_INPUT_MUX1_BT_ACTIVE,
165  btcoex_hw->btactive_gpio);
166 
167  REG_RMW_FIELD(ah, AR_GPIO_INPUT_MUX1,
168  AR_GPIO_INPUT_MUX1_BT_PRIORITY,
169  btcoex_hw->btpriority_gpio);
170 
171  /* Configure the desired GPIO ports for input */
172 
173  ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btactive_gpio);
174  ath9k_hw_cfg_gpio_input(ah, btcoex_hw->btpriority_gpio);
175 }
176 EXPORT_SYMBOL(ath9k_hw_btcoex_init_3wire);
177 
178 void ath9k_hw_btcoex_init_mci(struct ath_hw *ah)
179 {
180  ah->btcoex_hw.mci.ready = false;
181  ah->btcoex_hw.mci.bt_state = 0;
182  ah->btcoex_hw.mci.bt_ver_major = 3;
183  ah->btcoex_hw.mci.bt_ver_minor = 0;
184  ah->btcoex_hw.mci.bt_version_known = false;
185  ah->btcoex_hw.mci.update_2g5g = true;
186  ah->btcoex_hw.mci.is_2g = true;
187  ah->btcoex_hw.mci.wlan_channels_update = false;
188  ah->btcoex_hw.mci.wlan_channels[0] = 0x00000000;
189  ah->btcoex_hw.mci.wlan_channels[1] = 0xffffffff;
190  ah->btcoex_hw.mci.wlan_channels[2] = 0xffffffff;
191  ah->btcoex_hw.mci.wlan_channels[3] = 0x7fffffff;
192  ah->btcoex_hw.mci.query_bt = true;
193  ah->btcoex_hw.mci.unhalt_bt_gpm = true;
194  ah->btcoex_hw.mci.halted_bt_gpm = false;
195  ah->btcoex_hw.mci.need_flush_btinfo = false;
196  ah->btcoex_hw.mci.wlan_cal_seq = 0;
197  ah->btcoex_hw.mci.wlan_cal_done = 0;
198  ah->btcoex_hw.mci.config = 0x2201;
199 }
200 EXPORT_SYMBOL(ath9k_hw_btcoex_init_mci);
201 
202 static void ath9k_hw_btcoex_enable_2wire(struct ath_hw *ah)
203 {
204  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
205 
206  /* Configure the desired GPIO port for TX_FRAME output */
207  ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
208  AR_GPIO_OUTPUT_MUX_AS_TX_FRAME);
209 }
210 
211 /*
212  * For AR9002, bt_weight/wlan_weight are used.
213  * For AR9003 and above, stomp_type is used.
214  */
215 void ath9k_hw_btcoex_set_weight(struct ath_hw *ah,
216  u32 bt_weight,
217  u32 wlan_weight,
218  enum ath_stomp_type stomp_type)
219 {
220  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
221 
222  if (AR_SREV_9300_20_OR_LATER(ah)) {
223  const u32 *weight = ar9003_wlan_weights[stomp_type];
224  int i;
225 
226  if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
227  if ((stomp_type == ATH_BTCOEX_STOMP_LOW) &&
228  btcoex_hw->mci.stomp_ftp)
229  stomp_type = ATH_BTCOEX_STOMP_LOW_FTP;
230  weight = mci_wlan_weights[stomp_type];
231  }
232 
233  for (i = 0; i < AR9300_NUM_WLAN_WEIGHTS; i++) {
234  btcoex_hw->bt_weight[i] = AR9300_BT_WGHT;
235  btcoex_hw->wlan_weight[i] = weight[i];
236  }
237  } else {
238  btcoex_hw->bt_coex_weights =
239  SM(bt_weight, AR_BTCOEX_BT_WGHT) |
240  SM(wlan_weight, AR_BTCOEX_WL_WGHT);
241  }
242 }
243 EXPORT_SYMBOL(ath9k_hw_btcoex_set_weight);
244 
245 
246 static void ath9k_hw_btcoex_enable_3wire(struct ath_hw *ah)
247 {
248  struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
249  u32 val;
250  int i;
251 
252  /*
253  * Program coex mode and weight registers to
254  * enable coex 3-wire
255  */
256  REG_WRITE(ah, AR_BT_COEX_MODE, btcoex->bt_coex_mode);
257  REG_WRITE(ah, AR_BT_COEX_MODE2, btcoex->bt_coex_mode2);
258 
259 
260  if (AR_SREV_9300_20_OR_LATER(ah)) {
261  REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, btcoex->wlan_weight[0]);
262  REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, btcoex->wlan_weight[1]);
263  for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
264  REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i),
265  btcoex->bt_weight[i]);
266  } else
267  REG_WRITE(ah, AR_BT_COEX_WEIGHT, btcoex->bt_coex_weights);
268 
269 
270 
271  if (AR_SREV_9271(ah)) {
272  val = REG_READ(ah, 0x50040);
273  val &= 0xFFFFFEFF;
274  REG_WRITE(ah, 0x50040, val);
275  }
276 
277  REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
278  REG_RMW_FIELD(ah, AR_PCU_MISC, AR_PCU_BT_ANT_PREVENT_RX, 0);
279 
280  ath9k_hw_cfg_output(ah, btcoex->wlanactive_gpio,
281  AR_GPIO_OUTPUT_MUX_AS_RX_CLEAR_EXTERNAL);
282 }
283 
284 static void ath9k_hw_btcoex_enable_mci(struct ath_hw *ah)
285 {
286  struct ath_btcoex_hw *btcoex = &ah->btcoex_hw;
287  int i;
288 
289  for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
290  REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
291  btcoex->wlan_weight[i]);
292 
293  REG_RMW_FIELD(ah, AR_QUIET1, AR_QUIET1_QUIET_ACK_CTS_ENABLE, 1);
294  btcoex->enabled = true;
295 }
296 
297 void ath9k_hw_btcoex_enable(struct ath_hw *ah)
298 {
299  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
300 
301  switch (ath9k_hw_get_btcoex_scheme(ah)) {
302  case ATH_BTCOEX_CFG_NONE:
303  return;
304  case ATH_BTCOEX_CFG_2WIRE:
305  ath9k_hw_btcoex_enable_2wire(ah);
306  break;
307  case ATH_BTCOEX_CFG_3WIRE:
308  if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
309  ath9k_hw_btcoex_enable_mci(ah);
310  return;
311  }
312  ath9k_hw_btcoex_enable_3wire(ah);
313  break;
314  }
315 
316  REG_RMW(ah, AR_GPIO_PDPU,
317  (0x2 << (btcoex_hw->btactive_gpio * 2)),
318  (0x3 << (btcoex_hw->btactive_gpio * 2)));
319 
320  ah->btcoex_hw.enabled = true;
321 }
322 EXPORT_SYMBOL(ath9k_hw_btcoex_enable);
323 
324 void ath9k_hw_btcoex_disable(struct ath_hw *ah)
325 {
326  struct ath_btcoex_hw *btcoex_hw = &ah->btcoex_hw;
327  int i;
328 
329  btcoex_hw->enabled = false;
330  if (AR_SREV_9462(ah) || AR_SREV_9565(ah)) {
331  ath9k_hw_btcoex_bt_stomp(ah, ATH_BTCOEX_STOMP_NONE);
332  for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
333  REG_WRITE(ah, AR_MCI_COEX_WL_WEIGHTS(i),
334  btcoex_hw->wlan_weight[i]);
335  return;
336  }
337  ath9k_hw_set_gpio(ah, btcoex_hw->wlanactive_gpio, 0);
338 
339  ath9k_hw_cfg_output(ah, btcoex_hw->wlanactive_gpio,
340  AR_GPIO_OUTPUT_MUX_AS_OUTPUT);
341 
342  if (btcoex_hw->scheme == ATH_BTCOEX_CFG_3WIRE) {
343  REG_WRITE(ah, AR_BT_COEX_MODE, AR_BT_QUIET | AR_BT_MODE);
344  REG_WRITE(ah, AR_BT_COEX_MODE2, 0);
345 
346  if (AR_SREV_9300_20_OR_LATER(ah)) {
347  REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS0, 0);
348  REG_WRITE(ah, AR_BT_COEX_WL_WEIGHTS1, 0);
349  for (i = 0; i < AR9300_NUM_BT_WEIGHTS; i++)
350  REG_WRITE(ah, AR_BT_COEX_BT_WEIGHTS(i), 0);
351  } else
352  REG_WRITE(ah, AR_BT_COEX_WEIGHT, 0);
353 
354  }
355 }
356 EXPORT_SYMBOL(ath9k_hw_btcoex_disable);
357 
358 /*
359  * Configures appropriate weight based on stomp type.
360  */
361 void ath9k_hw_btcoex_bt_stomp(struct ath_hw *ah,
362  enum ath_stomp_type stomp_type)
363 {
364  if (AR_SREV_9300_20_OR_LATER(ah)) {
365  ath9k_hw_btcoex_set_weight(ah, 0, 0, stomp_type);
366  return;
367  }
368 
369  switch (stomp_type) {
370  case ATH_BTCOEX_STOMP_ALL:
371  ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
372  AR_STOMP_ALL_WLAN_WGHT, 0);
373  break;
374  case ATH_BTCOEX_STOMP_LOW:
375  ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
376  AR_STOMP_LOW_WLAN_WGHT, 0);
377  break;
378  case ATH_BTCOEX_STOMP_NONE:
379  ath9k_hw_btcoex_set_weight(ah, AR_BT_COEX_WGHT,
380  AR_STOMP_NONE_WLAN_WGHT, 0);
381  break;
382  default:
383  ath_dbg(ath9k_hw_common(ah), BTCOEX, "Invalid Stomptype\n");
384  break;
385  }
386 }
387 EXPORT_SYMBOL(ath9k_hw_btcoex_bt_stomp);
Generated on Thu Jan 10 2013 14:09:03 for Linux Kernel by   doxygen 1.8.2