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Merge branch 'for-linus' of git://github.com/ericvh/linux
[deliverable/linux.git] / drivers / net / wireless / ath / ath9k / init.c
1 /*
2 * Copyright (c) 2008-2011 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/dma-mapping.h>
18 #include <linux/slab.h>
19 #include <linux/ath9k_platform.h>
20
21 #include "ath9k.h"
22
23 static char *dev_info = "ath9k";
24
25 MODULE_AUTHOR("Atheros Communications");
26 MODULE_DESCRIPTION("Support for Atheros 802.11n wireless LAN cards.");
27 MODULE_SUPPORTED_DEVICE("Atheros 802.11n WLAN cards");
28 MODULE_LICENSE("Dual BSD/GPL");
29
30 static unsigned int ath9k_debug = ATH_DBG_DEFAULT;
31 module_param_named(debug, ath9k_debug, uint, 0);
32 MODULE_PARM_DESC(debug, "Debugging mask");
33
34 int ath9k_modparam_nohwcrypt;
35 module_param_named(nohwcrypt, ath9k_modparam_nohwcrypt, int, 0444);
36 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption");
37
38 int led_blink;
39 module_param_named(blink, led_blink, int, 0444);
40 MODULE_PARM_DESC(blink, "Enable LED blink on activity");
41
42 static int ath9k_btcoex_enable;
43 module_param_named(btcoex_enable, ath9k_btcoex_enable, int, 0444);
44 MODULE_PARM_DESC(btcoex_enable, "Enable wifi-BT coexistence");
45
46 bool is_ath9k_unloaded;
47 /* We use the hw_value as an index into our private channel structure */
48
49 #define CHAN2G(_freq, _idx) { \
50 .band = IEEE80211_BAND_2GHZ, \
51 .center_freq = (_freq), \
52 .hw_value = (_idx), \
53 .max_power = 20, \
54 }
55
56 #define CHAN5G(_freq, _idx) { \
57 .band = IEEE80211_BAND_5GHZ, \
58 .center_freq = (_freq), \
59 .hw_value = (_idx), \
60 .max_power = 20, \
61 }
62
63 /* Some 2 GHz radios are actually tunable on 2312-2732
64 * on 5 MHz steps, we support the channels which we know
65 * we have calibration data for all cards though to make
66 * this static */
67 static const struct ieee80211_channel ath9k_2ghz_chantable[] = {
68 CHAN2G(2412, 0), /* Channel 1 */
69 CHAN2G(2417, 1), /* Channel 2 */
70 CHAN2G(2422, 2), /* Channel 3 */
71 CHAN2G(2427, 3), /* Channel 4 */
72 CHAN2G(2432, 4), /* Channel 5 */
73 CHAN2G(2437, 5), /* Channel 6 */
74 CHAN2G(2442, 6), /* Channel 7 */
75 CHAN2G(2447, 7), /* Channel 8 */
76 CHAN2G(2452, 8), /* Channel 9 */
77 CHAN2G(2457, 9), /* Channel 10 */
78 CHAN2G(2462, 10), /* Channel 11 */
79 CHAN2G(2467, 11), /* Channel 12 */
80 CHAN2G(2472, 12), /* Channel 13 */
81 CHAN2G(2484, 13), /* Channel 14 */
82 };
83
84 /* Some 5 GHz radios are actually tunable on XXXX-YYYY
85 * on 5 MHz steps, we support the channels which we know
86 * we have calibration data for all cards though to make
87 * this static */
88 static const struct ieee80211_channel ath9k_5ghz_chantable[] = {
89 /* _We_ call this UNII 1 */
90 CHAN5G(5180, 14), /* Channel 36 */
91 CHAN5G(5200, 15), /* Channel 40 */
92 CHAN5G(5220, 16), /* Channel 44 */
93 CHAN5G(5240, 17), /* Channel 48 */
94 /* _We_ call this UNII 2 */
95 CHAN5G(5260, 18), /* Channel 52 */
96 CHAN5G(5280, 19), /* Channel 56 */
97 CHAN5G(5300, 20), /* Channel 60 */
98 CHAN5G(5320, 21), /* Channel 64 */
99 /* _We_ call this "Middle band" */
100 CHAN5G(5500, 22), /* Channel 100 */
101 CHAN5G(5520, 23), /* Channel 104 */
102 CHAN5G(5540, 24), /* Channel 108 */
103 CHAN5G(5560, 25), /* Channel 112 */
104 CHAN5G(5580, 26), /* Channel 116 */
105 CHAN5G(5600, 27), /* Channel 120 */
106 CHAN5G(5620, 28), /* Channel 124 */
107 CHAN5G(5640, 29), /* Channel 128 */
108 CHAN5G(5660, 30), /* Channel 132 */
109 CHAN5G(5680, 31), /* Channel 136 */
110 CHAN5G(5700, 32), /* Channel 140 */
111 /* _We_ call this UNII 3 */
112 CHAN5G(5745, 33), /* Channel 149 */
113 CHAN5G(5765, 34), /* Channel 153 */
114 CHAN5G(5785, 35), /* Channel 157 */
115 CHAN5G(5805, 36), /* Channel 161 */
116 CHAN5G(5825, 37), /* Channel 165 */
117 };
118
119 /* Atheros hardware rate code addition for short premble */
120 #define SHPCHECK(__hw_rate, __flags) \
121 ((__flags & IEEE80211_RATE_SHORT_PREAMBLE) ? (__hw_rate | 0x04 ) : 0)
122
123 #define RATE(_bitrate, _hw_rate, _flags) { \
124 .bitrate = (_bitrate), \
125 .flags = (_flags), \
126 .hw_value = (_hw_rate), \
127 .hw_value_short = (SHPCHECK(_hw_rate, _flags)) \
128 }
129
130 static struct ieee80211_rate ath9k_legacy_rates[] = {
131 RATE(10, 0x1b, 0),
132 RATE(20, 0x1a, IEEE80211_RATE_SHORT_PREAMBLE),
133 RATE(55, 0x19, IEEE80211_RATE_SHORT_PREAMBLE),
134 RATE(110, 0x18, IEEE80211_RATE_SHORT_PREAMBLE),
135 RATE(60, 0x0b, 0),
136 RATE(90, 0x0f, 0),
137 RATE(120, 0x0a, 0),
138 RATE(180, 0x0e, 0),
139 RATE(240, 0x09, 0),
140 RATE(360, 0x0d, 0),
141 RATE(480, 0x08, 0),
142 RATE(540, 0x0c, 0),
143 };
144
145 #ifdef CONFIG_MAC80211_LEDS
146 static const struct ieee80211_tpt_blink ath9k_tpt_blink[] = {
147 { .throughput = 0 * 1024, .blink_time = 334 },
148 { .throughput = 1 * 1024, .blink_time = 260 },
149 { .throughput = 5 * 1024, .blink_time = 220 },
150 { .throughput = 10 * 1024, .blink_time = 190 },
151 { .throughput = 20 * 1024, .blink_time = 170 },
152 { .throughput = 50 * 1024, .blink_time = 150 },
153 { .throughput = 70 * 1024, .blink_time = 130 },
154 { .throughput = 100 * 1024, .blink_time = 110 },
155 { .throughput = 200 * 1024, .blink_time = 80 },
156 { .throughput = 300 * 1024, .blink_time = 50 },
157 };
158 #endif
159
160 static void ath9k_deinit_softc(struct ath_softc *sc);
161
162 /*
163 * Read and write, they both share the same lock. We do this to serialize
164 * reads and writes on Atheros 802.11n PCI devices only. This is required
165 * as the FIFO on these devices can only accept sanely 2 requests.
166 */
167
168 static void ath9k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
169 {
170 struct ath_hw *ah = (struct ath_hw *) hw_priv;
171 struct ath_common *common = ath9k_hw_common(ah);
172 struct ath_softc *sc = (struct ath_softc *) common->priv;
173
174 if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
175 unsigned long flags;
176 spin_lock_irqsave(&sc->sc_serial_rw, flags);
177 iowrite32(val, sc->mem + reg_offset);
178 spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
179 } else
180 iowrite32(val, sc->mem + reg_offset);
181 }
182
183 static unsigned int ath9k_ioread32(void *hw_priv, u32 reg_offset)
184 {
185 struct ath_hw *ah = (struct ath_hw *) hw_priv;
186 struct ath_common *common = ath9k_hw_common(ah);
187 struct ath_softc *sc = (struct ath_softc *) common->priv;
188 u32 val;
189
190 if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
191 unsigned long flags;
192 spin_lock_irqsave(&sc->sc_serial_rw, flags);
193 val = ioread32(sc->mem + reg_offset);
194 spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
195 } else
196 val = ioread32(sc->mem + reg_offset);
197 return val;
198 }
199
200 static unsigned int __ath9k_reg_rmw(struct ath_softc *sc, u32 reg_offset,
201 u32 set, u32 clr)
202 {
203 u32 val;
204
205 val = ioread32(sc->mem + reg_offset);
206 val &= ~clr;
207 val |= set;
208 iowrite32(val, sc->mem + reg_offset);
209
210 return val;
211 }
212
213 static unsigned int ath9k_reg_rmw(void *hw_priv, u32 reg_offset, u32 set, u32 clr)
214 {
215 struct ath_hw *ah = (struct ath_hw *) hw_priv;
216 struct ath_common *common = ath9k_hw_common(ah);
217 struct ath_softc *sc = (struct ath_softc *) common->priv;
218 unsigned long uninitialized_var(flags);
219 u32 val;
220
221 if (ah->config.serialize_regmode == SER_REG_MODE_ON) {
222 spin_lock_irqsave(&sc->sc_serial_rw, flags);
223 val = __ath9k_reg_rmw(sc, reg_offset, set, clr);
224 spin_unlock_irqrestore(&sc->sc_serial_rw, flags);
225 } else
226 val = __ath9k_reg_rmw(sc, reg_offset, set, clr);
227
228 return val;
229 }
230
231 /**************************/
232 /* Initialization */
233 /**************************/
234
235 static void setup_ht_cap(struct ath_softc *sc,
236 struct ieee80211_sta_ht_cap *ht_info)
237 {
238 struct ath_hw *ah = sc->sc_ah;
239 struct ath_common *common = ath9k_hw_common(ah);
240 u8 tx_streams, rx_streams;
241 int i, max_streams;
242
243 ht_info->ht_supported = true;
244 ht_info->cap = IEEE80211_HT_CAP_SUP_WIDTH_20_40 |
245 IEEE80211_HT_CAP_SM_PS |
246 IEEE80211_HT_CAP_SGI_40 |
247 IEEE80211_HT_CAP_DSSSCCK40;
248
249 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_LDPC)
250 ht_info->cap |= IEEE80211_HT_CAP_LDPC_CODING;
251
252 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_SGI_20)
253 ht_info->cap |= IEEE80211_HT_CAP_SGI_20;
254
255 ht_info->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
256 ht_info->ampdu_density = IEEE80211_HT_MPDU_DENSITY_8;
257
258 if (AR_SREV_9330(ah) || AR_SREV_9485(ah))
259 max_streams = 1;
260 else if (AR_SREV_9300_20_OR_LATER(ah))
261 max_streams = 3;
262 else
263 max_streams = 2;
264
265 if (AR_SREV_9280_20_OR_LATER(ah)) {
266 if (max_streams >= 2)
267 ht_info->cap |= IEEE80211_HT_CAP_TX_STBC;
268 ht_info->cap |= (1 << IEEE80211_HT_CAP_RX_STBC_SHIFT);
269 }
270
271 /* set up supported mcs set */
272 memset(&ht_info->mcs, 0, sizeof(ht_info->mcs));
273 tx_streams = ath9k_cmn_count_streams(ah->txchainmask, max_streams);
274 rx_streams = ath9k_cmn_count_streams(ah->rxchainmask, max_streams);
275
276 ath_dbg(common, ATH_DBG_CONFIG,
277 "TX streams %d, RX streams: %d\n",
278 tx_streams, rx_streams);
279
280 if (tx_streams != rx_streams) {
281 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_RX_DIFF;
282 ht_info->mcs.tx_params |= ((tx_streams - 1) <<
283 IEEE80211_HT_MCS_TX_MAX_STREAMS_SHIFT);
284 }
285
286 for (i = 0; i < rx_streams; i++)
287 ht_info->mcs.rx_mask[i] = 0xff;
288
289 ht_info->mcs.tx_params |= IEEE80211_HT_MCS_TX_DEFINED;
290 }
291
292 static int ath9k_reg_notifier(struct wiphy *wiphy,
293 struct regulatory_request *request)
294 {
295 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
296 struct ath_softc *sc = hw->priv;
297 struct ath_regulatory *reg = ath9k_hw_regulatory(sc->sc_ah);
298
299 return ath_reg_notifier_apply(wiphy, request, reg);
300 }
301
302 /*
303 * This function will allocate both the DMA descriptor structure, and the
304 * buffers it contains. These are used to contain the descriptors used
305 * by the system.
306 */
307 int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
308 struct list_head *head, const char *name,
309 int nbuf, int ndesc, bool is_tx)
310 {
311 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
312 u8 *ds;
313 struct ath_buf *bf;
314 int i, bsize, error, desc_len;
315
316 ath_dbg(common, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
317 name, nbuf, ndesc);
318
319 INIT_LIST_HEAD(head);
320
321 if (is_tx)
322 desc_len = sc->sc_ah->caps.tx_desc_len;
323 else
324 desc_len = sizeof(struct ath_desc);
325
326 /* ath_desc must be a multiple of DWORDs */
327 if ((desc_len % 4) != 0) {
328 ath_err(common, "ath_desc not DWORD aligned\n");
329 BUG_ON((desc_len % 4) != 0);
330 error = -ENOMEM;
331 goto fail;
332 }
333
334 dd->dd_desc_len = desc_len * nbuf * ndesc;
335
336 /*
337 * Need additional DMA memory because we can't use
338 * descriptors that cross the 4K page boundary. Assume
339 * one skipped descriptor per 4K page.
340 */
341 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_4KB_SPLITTRANS)) {
342 u32 ndesc_skipped =
343 ATH_DESC_4KB_BOUND_NUM_SKIPPED(dd->dd_desc_len);
344 u32 dma_len;
345
346 while (ndesc_skipped) {
347 dma_len = ndesc_skipped * desc_len;
348 dd->dd_desc_len += dma_len;
349
350 ndesc_skipped = ATH_DESC_4KB_BOUND_NUM_SKIPPED(dma_len);
351 }
352 }
353
354 /* allocate descriptors */
355 dd->dd_desc = dma_alloc_coherent(sc->dev, dd->dd_desc_len,
356 &dd->dd_desc_paddr, GFP_KERNEL);
357 if (dd->dd_desc == NULL) {
358 error = -ENOMEM;
359 goto fail;
360 }
361 ds = (u8 *) dd->dd_desc;
362 ath_dbg(common, ATH_DBG_CONFIG, "%s DMA map: %p (%u) -> %llx (%u)\n",
363 name, ds, (u32) dd->dd_desc_len,
364 ito64(dd->dd_desc_paddr), /*XXX*/(u32) dd->dd_desc_len);
365
366 /* allocate buffers */
367 bsize = sizeof(struct ath_buf) * nbuf;
368 bf = kzalloc(bsize, GFP_KERNEL);
369 if (bf == NULL) {
370 error = -ENOMEM;
371 goto fail2;
372 }
373 dd->dd_bufptr = bf;
374
375 for (i = 0; i < nbuf; i++, bf++, ds += (desc_len * ndesc)) {
376 bf->bf_desc = ds;
377 bf->bf_daddr = DS2PHYS(dd, ds);
378
379 if (!(sc->sc_ah->caps.hw_caps &
380 ATH9K_HW_CAP_4KB_SPLITTRANS)) {
381 /*
382 * Skip descriptor addresses which can cause 4KB
383 * boundary crossing (addr + length) with a 32 dword
384 * descriptor fetch.
385 */
386 while (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr)) {
387 BUG_ON((caddr_t) bf->bf_desc >=
388 ((caddr_t) dd->dd_desc +
389 dd->dd_desc_len));
390
391 ds += (desc_len * ndesc);
392 bf->bf_desc = ds;
393 bf->bf_daddr = DS2PHYS(dd, ds);
394 }
395 }
396 list_add_tail(&bf->list, head);
397 }
398 return 0;
399 fail2:
400 dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
401 dd->dd_desc_paddr);
402 fail:
403 memset(dd, 0, sizeof(*dd));
404 return error;
405 }
406
407 static int ath9k_init_btcoex(struct ath_softc *sc)
408 {
409 struct ath_txq *txq;
410 int r;
411
412 switch (sc->sc_ah->btcoex_hw.scheme) {
413 case ATH_BTCOEX_CFG_NONE:
414 break;
415 case ATH_BTCOEX_CFG_2WIRE:
416 ath9k_hw_btcoex_init_2wire(sc->sc_ah);
417 break;
418 case ATH_BTCOEX_CFG_3WIRE:
419 ath9k_hw_btcoex_init_3wire(sc->sc_ah);
420 r = ath_init_btcoex_timer(sc);
421 if (r)
422 return -1;
423 txq = sc->tx.txq_map[WME_AC_BE];
424 ath9k_hw_init_btcoex_hw(sc->sc_ah, txq->axq_qnum);
425 sc->btcoex.bt_stomp_type = ATH_BTCOEX_STOMP_LOW;
426 break;
427 default:
428 WARN_ON(1);
429 break;
430 }
431
432 return 0;
433 }
434
435 static int ath9k_init_queues(struct ath_softc *sc)
436 {
437 int i = 0;
438
439 sc->beacon.beaconq = ath9k_hw_beaconq_setup(sc->sc_ah);
440 sc->beacon.cabq = ath_txq_setup(sc, ATH9K_TX_QUEUE_CAB, 0);
441
442 sc->config.cabqReadytime = ATH_CABQ_READY_TIME;
443 ath_cabq_update(sc);
444
445 for (i = 0; i < WME_NUM_AC; i++) {
446 sc->tx.txq_map[i] = ath_txq_setup(sc, ATH9K_TX_QUEUE_DATA, i);
447 sc->tx.txq_map[i]->mac80211_qnum = i;
448 }
449 return 0;
450 }
451
452 static int ath9k_init_channels_rates(struct ath_softc *sc)
453 {
454 void *channels;
455
456 BUILD_BUG_ON(ARRAY_SIZE(ath9k_2ghz_chantable) +
457 ARRAY_SIZE(ath9k_5ghz_chantable) !=
458 ATH9K_NUM_CHANNELS);
459
460 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ) {
461 channels = kmemdup(ath9k_2ghz_chantable,
462 sizeof(ath9k_2ghz_chantable), GFP_KERNEL);
463 if (!channels)
464 return -ENOMEM;
465
466 sc->sbands[IEEE80211_BAND_2GHZ].channels = channels;
467 sc->sbands[IEEE80211_BAND_2GHZ].band = IEEE80211_BAND_2GHZ;
468 sc->sbands[IEEE80211_BAND_2GHZ].n_channels =
469 ARRAY_SIZE(ath9k_2ghz_chantable);
470 sc->sbands[IEEE80211_BAND_2GHZ].bitrates = ath9k_legacy_rates;
471 sc->sbands[IEEE80211_BAND_2GHZ].n_bitrates =
472 ARRAY_SIZE(ath9k_legacy_rates);
473 }
474
475 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ) {
476 channels = kmemdup(ath9k_5ghz_chantable,
477 sizeof(ath9k_5ghz_chantable), GFP_KERNEL);
478 if (!channels) {
479 if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
480 kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
481 return -ENOMEM;
482 }
483
484 sc->sbands[IEEE80211_BAND_5GHZ].channels = channels;
485 sc->sbands[IEEE80211_BAND_5GHZ].band = IEEE80211_BAND_5GHZ;
486 sc->sbands[IEEE80211_BAND_5GHZ].n_channels =
487 ARRAY_SIZE(ath9k_5ghz_chantable);
488 sc->sbands[IEEE80211_BAND_5GHZ].bitrates =
489 ath9k_legacy_rates + 4;
490 sc->sbands[IEEE80211_BAND_5GHZ].n_bitrates =
491 ARRAY_SIZE(ath9k_legacy_rates) - 4;
492 }
493 return 0;
494 }
495
496 static void ath9k_init_misc(struct ath_softc *sc)
497 {
498 struct ath_common *common = ath9k_hw_common(sc->sc_ah);
499 int i = 0;
500 setup_timer(&common->ani.timer, ath_ani_calibrate, (unsigned long)sc);
501
502 sc->config.txpowlimit = ATH_TXPOWER_MAX;
503
504 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT) {
505 sc->sc_flags |= SC_OP_TXAGGR;
506 sc->sc_flags |= SC_OP_RXAGGR;
507 }
508
509 sc->rx.defant = ath9k_hw_getdefantenna(sc->sc_ah);
510
511 memcpy(common->bssidmask, ath_bcast_mac, ETH_ALEN);
512
513 sc->beacon.slottime = ATH9K_SLOT_TIME_9;
514
515 for (i = 0; i < ARRAY_SIZE(sc->beacon.bslot); i++)
516 sc->beacon.bslot[i] = NULL;
517
518 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB)
519 sc->ant_comb.count = ATH_ANT_DIV_COMB_INIT_COUNT;
520 }
521
522 static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
523 const struct ath_bus_ops *bus_ops)
524 {
525 struct ath9k_platform_data *pdata = sc->dev->platform_data;
526 struct ath_hw *ah = NULL;
527 struct ath_common *common;
528 int ret = 0, i;
529 int csz = 0;
530
531 ah = kzalloc(sizeof(struct ath_hw), GFP_KERNEL);
532 if (!ah)
533 return -ENOMEM;
534
535 ah->hw = sc->hw;
536 ah->hw_version.devid = devid;
537 ah->reg_ops.read = ath9k_ioread32;
538 ah->reg_ops.write = ath9k_iowrite32;
539 ah->reg_ops.rmw = ath9k_reg_rmw;
540 atomic_set(&ah->intr_ref_cnt, -1);
541 sc->sc_ah = ah;
542
543 if (!pdata) {
544 ah->ah_flags |= AH_USE_EEPROM;
545 sc->sc_ah->led_pin = -1;
546 } else {
547 sc->sc_ah->gpio_mask = pdata->gpio_mask;
548 sc->sc_ah->gpio_val = pdata->gpio_val;
549 sc->sc_ah->led_pin = pdata->led_pin;
550 ah->is_clk_25mhz = pdata->is_clk_25mhz;
551 ah->get_mac_revision = pdata->get_mac_revision;
552 ah->external_reset = pdata->external_reset;
553 }
554
555 common = ath9k_hw_common(ah);
556 common->ops = &ah->reg_ops;
557 common->bus_ops = bus_ops;
558 common->ah = ah;
559 common->hw = sc->hw;
560 common->priv = sc;
561 common->debug_mask = ath9k_debug;
562 common->btcoex_enabled = ath9k_btcoex_enable == 1;
563 common->disable_ani = false;
564 spin_lock_init(&common->cc_lock);
565
566 spin_lock_init(&sc->sc_serial_rw);
567 spin_lock_init(&sc->sc_pm_lock);
568 mutex_init(&sc->mutex);
569 #ifdef CONFIG_ATH9K_DEBUGFS
570 spin_lock_init(&sc->nodes_lock);
571 spin_lock_init(&sc->debug.samp_lock);
572 INIT_LIST_HEAD(&sc->nodes);
573 #endif
574 tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
575 tasklet_init(&sc->bcon_tasklet, ath_beacon_tasklet,
576 (unsigned long)sc);
577
578 /*
579 * Cache line size is used to size and align various
580 * structures used to communicate with the hardware.
581 */
582 ath_read_cachesize(common, &csz);
583 common->cachelsz = csz << 2; /* convert to bytes */
584
585 /* Initializes the hardware for all supported chipsets */
586 ret = ath9k_hw_init(ah);
587 if (ret)
588 goto err_hw;
589
590 if (pdata && pdata->macaddr)
591 memcpy(common->macaddr, pdata->macaddr, ETH_ALEN);
592
593 ret = ath9k_init_queues(sc);
594 if (ret)
595 goto err_queues;
596
597 ret = ath9k_init_btcoex(sc);
598 if (ret)
599 goto err_btcoex;
600
601 ret = ath9k_init_channels_rates(sc);
602 if (ret)
603 goto err_btcoex;
604
605 ath9k_cmn_init_crypto(sc->sc_ah);
606 ath9k_init_misc(sc);
607
608 return 0;
609
610 err_btcoex:
611 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
612 if (ATH_TXQ_SETUP(sc, i))
613 ath_tx_cleanupq(sc, &sc->tx.txq[i]);
614 err_queues:
615 ath9k_hw_deinit(ah);
616 err_hw:
617
618 kfree(ah);
619 sc->sc_ah = NULL;
620
621 return ret;
622 }
623
624 static void ath9k_init_band_txpower(struct ath_softc *sc, int band)
625 {
626 struct ieee80211_supported_band *sband;
627 struct ieee80211_channel *chan;
628 struct ath_hw *ah = sc->sc_ah;
629 int i;
630
631 sband = &sc->sbands[band];
632 for (i = 0; i < sband->n_channels; i++) {
633 chan = &sband->channels[i];
634 ah->curchan = &ah->channels[chan->hw_value];
635 ath9k_cmn_update_ichannel(ah->curchan, chan, NL80211_CHAN_HT20);
636 ath9k_hw_set_txpowerlimit(ah, MAX_RATE_POWER, true);
637 }
638 }
639
640 static void ath9k_init_txpower_limits(struct ath_softc *sc)
641 {
642 struct ath_hw *ah = sc->sc_ah;
643 struct ath9k_channel *curchan = ah->curchan;
644
645 if (ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
646 ath9k_init_band_txpower(sc, IEEE80211_BAND_2GHZ);
647 if (ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
648 ath9k_init_band_txpower(sc, IEEE80211_BAND_5GHZ);
649
650 ah->curchan = curchan;
651 }
652
653 void ath9k_reload_chainmask_settings(struct ath_softc *sc)
654 {
655 if (!(sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT))
656 return;
657
658 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
659 setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_2GHZ].ht_cap);
660 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
661 setup_ht_cap(sc, &sc->sbands[IEEE80211_BAND_5GHZ].ht_cap);
662 }
663
664
665 void ath9k_set_hw_capab(struct ath_softc *sc, struct ieee80211_hw *hw)
666 {
667 struct ath_hw *ah = sc->sc_ah;
668 struct ath_common *common = ath9k_hw_common(ah);
669
670 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
671 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
672 IEEE80211_HW_SIGNAL_DBM |
673 IEEE80211_HW_SUPPORTS_PS |
674 IEEE80211_HW_PS_NULLFUNC_STACK |
675 IEEE80211_HW_SPECTRUM_MGMT |
676 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
677
678 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_HT)
679 hw->flags |= IEEE80211_HW_AMPDU_AGGREGATION;
680
681 if (AR_SREV_9160_10_OR_LATER(sc->sc_ah) || ath9k_modparam_nohwcrypt)
682 hw->flags |= IEEE80211_HW_MFP_CAPABLE;
683
684 hw->wiphy->interface_modes =
685 BIT(NL80211_IFTYPE_P2P_GO) |
686 BIT(NL80211_IFTYPE_P2P_CLIENT) |
687 BIT(NL80211_IFTYPE_AP) |
688 BIT(NL80211_IFTYPE_WDS) |
689 BIT(NL80211_IFTYPE_STATION) |
690 BIT(NL80211_IFTYPE_ADHOC) |
691 BIT(NL80211_IFTYPE_MESH_POINT);
692
693 if (AR_SREV_5416(sc->sc_ah))
694 hw->wiphy->flags &= ~WIPHY_FLAG_PS_ON_BY_DEFAULT;
695
696 hw->wiphy->flags |= WIPHY_FLAG_IBSS_RSN;
697
698 hw->queues = 4;
699 hw->max_rates = 4;
700 hw->channel_change_time = 5000;
701 hw->max_listen_interval = 10;
702 hw->max_rate_tries = 10;
703 hw->sta_data_size = sizeof(struct ath_node);
704 hw->vif_data_size = sizeof(struct ath_vif);
705
706 hw->wiphy->available_antennas_rx = BIT(ah->caps.max_rxchains) - 1;
707 hw->wiphy->available_antennas_tx = BIT(ah->caps.max_txchains) - 1;
708
709 /* single chain devices with rx diversity */
710 if (ah->caps.hw_caps & ATH9K_HW_CAP_ANT_DIV_COMB)
711 hw->wiphy->available_antennas_rx = BIT(0) | BIT(1);
712
713 sc->ant_rx = hw->wiphy->available_antennas_rx;
714 sc->ant_tx = hw->wiphy->available_antennas_tx;
715
716 #ifdef CONFIG_ATH9K_RATE_CONTROL
717 hw->rate_control_algorithm = "ath9k_rate_control";
718 #endif
719
720 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_2GHZ)
721 hw->wiphy->bands[IEEE80211_BAND_2GHZ] =
722 &sc->sbands[IEEE80211_BAND_2GHZ];
723 if (sc->sc_ah->caps.hw_caps & ATH9K_HW_CAP_5GHZ)
724 hw->wiphy->bands[IEEE80211_BAND_5GHZ] =
725 &sc->sbands[IEEE80211_BAND_5GHZ];
726
727 ath9k_reload_chainmask_settings(sc);
728
729 SET_IEEE80211_PERM_ADDR(hw, common->macaddr);
730 }
731
732 int ath9k_init_device(u16 devid, struct ath_softc *sc,
733 const struct ath_bus_ops *bus_ops)
734 {
735 struct ieee80211_hw *hw = sc->hw;
736 struct ath_common *common;
737 struct ath_hw *ah;
738 int error = 0;
739 struct ath_regulatory *reg;
740
741 /* Bring up device */
742 error = ath9k_init_softc(devid, sc, bus_ops);
743 if (error != 0)
744 goto error_init;
745
746 ah = sc->sc_ah;
747 common = ath9k_hw_common(ah);
748 ath9k_set_hw_capab(sc, hw);
749
750 /* Initialize regulatory */
751 error = ath_regd_init(&common->regulatory, sc->hw->wiphy,
752 ath9k_reg_notifier);
753 if (error)
754 goto error_regd;
755
756 reg = &common->regulatory;
757
758 /* Setup TX DMA */
759 error = ath_tx_init(sc, ATH_TXBUF);
760 if (error != 0)
761 goto error_tx;
762
763 /* Setup RX DMA */
764 error = ath_rx_init(sc, ATH_RXBUF);
765 if (error != 0)
766 goto error_rx;
767
768 ath9k_init_txpower_limits(sc);
769
770 #ifdef CONFIG_MAC80211_LEDS
771 /* must be initialized before ieee80211_register_hw */
772 sc->led_cdev.default_trigger = ieee80211_create_tpt_led_trigger(sc->hw,
773 IEEE80211_TPT_LEDTRIG_FL_RADIO, ath9k_tpt_blink,
774 ARRAY_SIZE(ath9k_tpt_blink));
775 #endif
776
777 /* Register with mac80211 */
778 error = ieee80211_register_hw(hw);
779 if (error)
780 goto error_register;
781
782 error = ath9k_init_debug(ah);
783 if (error) {
784 ath_err(common, "Unable to create debugfs files\n");
785 goto error_world;
786 }
787
788 /* Handle world regulatory */
789 if (!ath_is_world_regd(reg)) {
790 error = regulatory_hint(hw->wiphy, reg->alpha2);
791 if (error)
792 goto error_world;
793 }
794
795 INIT_WORK(&sc->hw_reset_work, ath_reset_work);
796 INIT_WORK(&sc->hw_check_work, ath_hw_check);
797 INIT_WORK(&sc->paprd_work, ath_paprd_calibrate);
798 INIT_DELAYED_WORK(&sc->hw_pll_work, ath_hw_pll_work);
799 sc->last_rssi = ATH_RSSI_DUMMY_MARKER;
800
801 ath_init_leds(sc);
802 ath_start_rfkill_poll(sc);
803
804 return 0;
805
806 error_world:
807 ieee80211_unregister_hw(hw);
808 error_register:
809 ath_rx_cleanup(sc);
810 error_rx:
811 ath_tx_cleanup(sc);
812 error_tx:
813 /* Nothing */
814 error_regd:
815 ath9k_deinit_softc(sc);
816 error_init:
817 return error;
818 }
819
820 /*****************************/
821 /* De-Initialization */
822 /*****************************/
823
824 static void ath9k_deinit_softc(struct ath_softc *sc)
825 {
826 int i = 0;
827
828 if (sc->sbands[IEEE80211_BAND_2GHZ].channels)
829 kfree(sc->sbands[IEEE80211_BAND_2GHZ].channels);
830
831 if (sc->sbands[IEEE80211_BAND_5GHZ].channels)
832 kfree(sc->sbands[IEEE80211_BAND_5GHZ].channels);
833
834 if ((sc->btcoex.no_stomp_timer) &&
835 sc->sc_ah->btcoex_hw.scheme == ATH_BTCOEX_CFG_3WIRE)
836 ath_gen_timer_free(sc->sc_ah, sc->btcoex.no_stomp_timer);
837
838 for (i = 0; i < ATH9K_NUM_TX_QUEUES; i++)
839 if (ATH_TXQ_SETUP(sc, i))
840 ath_tx_cleanupq(sc, &sc->tx.txq[i]);
841
842 ath9k_hw_deinit(sc->sc_ah);
843
844 kfree(sc->sc_ah);
845 sc->sc_ah = NULL;
846 }
847
848 void ath9k_deinit_device(struct ath_softc *sc)
849 {
850 struct ieee80211_hw *hw = sc->hw;
851
852 ath9k_ps_wakeup(sc);
853
854 wiphy_rfkill_stop_polling(sc->hw->wiphy);
855 ath_deinit_leds(sc);
856
857 ath9k_ps_restore(sc);
858
859 ieee80211_unregister_hw(hw);
860 ath_rx_cleanup(sc);
861 ath_tx_cleanup(sc);
862 ath9k_deinit_softc(sc);
863 }
864
865 void ath_descdma_cleanup(struct ath_softc *sc,
866 struct ath_descdma *dd,
867 struct list_head *head)
868 {
869 dma_free_coherent(sc->dev, dd->dd_desc_len, dd->dd_desc,
870 dd->dd_desc_paddr);
871
872 INIT_LIST_HEAD(head);
873 kfree(dd->dd_bufptr);
874 memset(dd, 0, sizeof(*dd));
875 }
876
877 /************************/
878 /* Module Hooks */
879 /************************/
880
881 static int __init ath9k_init(void)
882 {
883 int error;
884
885 /* Register rate control algorithm */
886 error = ath_rate_control_register();
887 if (error != 0) {
888 printk(KERN_ERR
889 "ath9k: Unable to register rate control "
890 "algorithm: %d\n",
891 error);
892 goto err_out;
893 }
894
895 error = ath_pci_init();
896 if (error < 0) {
897 printk(KERN_ERR
898 "ath9k: No PCI devices found, driver not installed.\n");
899 error = -ENODEV;
900 goto err_rate_unregister;
901 }
902
903 error = ath_ahb_init();
904 if (error < 0) {
905 error = -ENODEV;
906 goto err_pci_exit;
907 }
908
909 return 0;
910
911 err_pci_exit:
912 ath_pci_exit();
913
914 err_rate_unregister:
915 ath_rate_control_unregister();
916 err_out:
917 return error;
918 }
919 module_init(ath9k_init);
920
921 static void __exit ath9k_exit(void)
922 {
923 is_ath9k_unloaded = true;
924 ath_ahb_exit();
925 ath_pci_exit();
926 ath_rate_control_unregister();
927 printk(KERN_INFO "%s: Driver unloaded\n", dev_info);
928 }
929 module_exit(ath9k_exit);
Linux kernel - Deliverables
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