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ath5k: Fix SREV reporting after SREV updates
[karo-tx-linux.git] / drivers / net / wireless / ath5k / base.c
1 /*-
2  * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3  * Copyright (c) 2004-2005 Atheros Communications, Inc.
4  * Copyright (c) 2006 Devicescape Software, Inc.
5  * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
6  * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
7  *
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer,
15  *    without modification.
16  * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17  *    similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
18  *    redistribution must be conditioned upon including a substantially
19  *    similar Disclaimer requirement for further binary redistribution.
20  * 3. Neither the names of the above-listed copyright holders nor the names
21  *    of any contributors may be used to endorse or promote products derived
22  *    from this software without specific prior written permission.
23  *
24  * Alternatively, this software may be distributed under the terms of the
25  * GNU General Public License ("GPL") version 2 as published by the Free
26  * Software Foundation.
27  *
28  * NO WARRANTY
29  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31  * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
32  * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
33  * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
34  * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
37  * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
39  * THE POSSIBILITY OF SUCH DAMAGES.
40  *
41  */
42
43 #include <linux/module.h>
44 #include <linux/delay.h>
45 #include <linux/hardirq.h>
46 #include <linux/if.h>
47 #include <linux/io.h>
48 #include <linux/netdevice.h>
49 #include <linux/cache.h>
50 #include <linux/pci.h>
51 #include <linux/ethtool.h>
52 #include <linux/uaccess.h>
53
54 #include <net/ieee80211_radiotap.h>
55
56 #include <asm/unaligned.h>
57
58 #include "base.h"
59 #include "reg.h"
60 #include "debug.h"
61
62 static int ath5k_calinterval = 10; /* Calibrate PHY every 10 secs (TODO: Fixme) */
63
64
65 /******************\
66 * Internal defines *
67 \******************/
68
69 /* Module info */
70 MODULE_AUTHOR("Jiri Slaby");
71 MODULE_AUTHOR("Nick Kossifidis");
72 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
73 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
74 MODULE_LICENSE("Dual BSD/GPL");
75 MODULE_VERSION("0.5.0 (EXPERIMENTAL)");
76
77
78 /* Known PCI ids */
79 static struct pci_device_id ath5k_pci_id_table[] __devinitdata = {
80         { PCI_VDEVICE(ATHEROS, 0x0207), .driver_data = AR5K_AR5210 }, /* 5210 early */
81         { PCI_VDEVICE(ATHEROS, 0x0007), .driver_data = AR5K_AR5210 }, /* 5210 */
82         { PCI_VDEVICE(ATHEROS, 0x0011), .driver_data = AR5K_AR5211 }, /* 5311 - this is on AHB bus !*/
83         { PCI_VDEVICE(ATHEROS, 0x0012), .driver_data = AR5K_AR5211 }, /* 5211 */
84         { PCI_VDEVICE(ATHEROS, 0x0013), .driver_data = AR5K_AR5212 }, /* 5212 */
85         { PCI_VDEVICE(3COM_2,  0x0013), .driver_data = AR5K_AR5212 }, /* 3com 5212 */
86         { PCI_VDEVICE(3COM,    0x0013), .driver_data = AR5K_AR5212 }, /* 3com 3CRDAG675 5212 */
87         { PCI_VDEVICE(ATHEROS, 0x1014), .driver_data = AR5K_AR5212 }, /* IBM minipci 5212 */
88         { PCI_VDEVICE(ATHEROS, 0x0014), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
89         { PCI_VDEVICE(ATHEROS, 0x0015), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
90         { PCI_VDEVICE(ATHEROS, 0x0016), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
91         { PCI_VDEVICE(ATHEROS, 0x0017), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
92         { PCI_VDEVICE(ATHEROS, 0x0018), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
93         { PCI_VDEVICE(ATHEROS, 0x0019), .driver_data = AR5K_AR5212 }, /* 5212 combatible */
94         { PCI_VDEVICE(ATHEROS, 0x001a), .driver_data = AR5K_AR5212 }, /* 2413 Griffin-lite */
95         { PCI_VDEVICE(ATHEROS, 0x001b), .driver_data = AR5K_AR5212 }, /* 5413 Eagle */
96         { PCI_VDEVICE(ATHEROS, 0x001c), .driver_data = AR5K_AR5212 }, /* 5424 Condor (PCI-E)*/
97         { 0 }
98 };
99 MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
100
101 /* Known SREVs */
102 static struct ath5k_srev_name srev_names[] = {
103         { "5210",       AR5K_VERSION_MAC,       AR5K_SREV_AR5210 },
104         { "5311",       AR5K_VERSION_MAC,       AR5K_SREV_AR5311 },
105         { "5311A",      AR5K_VERSION_MAC,       AR5K_SREV_AR5311A },
106         { "5311B",      AR5K_VERSION_MAC,       AR5K_SREV_AR5311B },
107         { "5211",       AR5K_VERSION_MAC,       AR5K_SREV_AR5211 },
108         { "5212",       AR5K_VERSION_MAC,       AR5K_SREV_AR5212 },
109         { "5213",       AR5K_VERSION_MAC,       AR5K_SREV_AR5213 },
110         { "5213A",      AR5K_VERSION_MAC,       AR5K_SREV_AR5213A },
111         { "2413",       AR5K_VERSION_MAC,       AR5K_SREV_AR2413 },
112         { "2414",       AR5K_VERSION_MAC,       AR5K_SREV_AR2414 },
113         { "5424",       AR5K_VERSION_MAC,       AR5K_SREV_AR5424 },
114         { "5413",       AR5K_VERSION_MAC,       AR5K_SREV_AR5413 },
115         { "5414",       AR5K_VERSION_MAC,       AR5K_SREV_AR5414 },
116         { "2415",       AR5K_VERSION_MAC,       AR5K_SREV_AR2415 },
117         { "5416",       AR5K_VERSION_MAC,       AR5K_SREV_AR5416 },
118         { "5418",       AR5K_VERSION_MAC,       AR5K_SREV_AR5418 },
119         { "2425",       AR5K_VERSION_MAC,       AR5K_SREV_AR2425 },
120         { "2417",       AR5K_VERSION_MAC,       AR5K_SREV_AR2417 },
121         { "xxxxx",      AR5K_VERSION_MAC,       AR5K_SREV_UNKNOWN },
122         { "5110",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5110 },
123         { "5111",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5111 },
124         { "5111A",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_5111A },
125         { "2111",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2111 },
126         { "5112",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5112 },
127         { "5112A",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_5112A },
128         { "5112B",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_5112B },
129         { "2112",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2112 },
130         { "2112A",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_2112A },
131         { "2112B",      AR5K_VERSION_RAD,       AR5K_SREV_RAD_2112B },
132         { "2413",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2413 },
133         { "5413",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5413 },
134         { "2316",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2316 },
135         { "2317",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_2317 },
136         { "5424",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5424 },
137         { "5133",       AR5K_VERSION_RAD,       AR5K_SREV_RAD_5133 },
138         { "xxxxx",      AR5K_VERSION_RAD,       AR5K_SREV_UNKNOWN },
139 };
140
141 static struct ieee80211_rate ath5k_rates[] = {
142         { .bitrate = 10,
143           .hw_value = ATH5K_RATE_CODE_1M, },
144         { .bitrate = 20,
145           .hw_value = ATH5K_RATE_CODE_2M,
146           .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
147           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
148         { .bitrate = 55,
149           .hw_value = ATH5K_RATE_CODE_5_5M,
150           .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
151           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
152         { .bitrate = 110,
153           .hw_value = ATH5K_RATE_CODE_11M,
154           .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
155           .flags = IEEE80211_RATE_SHORT_PREAMBLE },
156         { .bitrate = 60,
157           .hw_value = ATH5K_RATE_CODE_6M,
158           .flags = 0 },
159         { .bitrate = 90,
160           .hw_value = ATH5K_RATE_CODE_9M,
161           .flags = 0 },
162         { .bitrate = 120,
163           .hw_value = ATH5K_RATE_CODE_12M,
164           .flags = 0 },
165         { .bitrate = 180,
166           .hw_value = ATH5K_RATE_CODE_18M,
167           .flags = 0 },
168         { .bitrate = 240,
169           .hw_value = ATH5K_RATE_CODE_24M,
170           .flags = 0 },
171         { .bitrate = 360,
172           .hw_value = ATH5K_RATE_CODE_36M,
173           .flags = 0 },
174         { .bitrate = 480,
175           .hw_value = ATH5K_RATE_CODE_48M,
176           .flags = 0 },
177         { .bitrate = 540,
178           .hw_value = ATH5K_RATE_CODE_54M,
179           .flags = 0 },
180         /* XR missing */
181 };
182
183 /*
184  * Prototypes - PCI stack related functions
185  */
186 static int __devinit    ath5k_pci_probe(struct pci_dev *pdev,
187                                 const struct pci_device_id *id);
188 static void __devexit   ath5k_pci_remove(struct pci_dev *pdev);
189 #ifdef CONFIG_PM
190 static int              ath5k_pci_suspend(struct pci_dev *pdev,
191                                         pm_message_t state);
192 static int              ath5k_pci_resume(struct pci_dev *pdev);
193 #else
194 #define ath5k_pci_suspend NULL
195 #define ath5k_pci_resume NULL
196 #endif /* CONFIG_PM */
197
198 static struct pci_driver ath5k_pci_driver = {
199         .name           = "ath5k_pci",
200         .id_table       = ath5k_pci_id_table,
201         .probe          = ath5k_pci_probe,
202         .remove         = __devexit_p(ath5k_pci_remove),
203         .suspend        = ath5k_pci_suspend,
204         .resume         = ath5k_pci_resume,
205 };
206
207
208
209 /*
210  * Prototypes - MAC 802.11 stack related functions
211  */
212 static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
213 static int ath5k_reset(struct ath5k_softc *sc, bool stop, bool change_channel);
214 static int ath5k_reset_wake(struct ath5k_softc *sc);
215 static int ath5k_start(struct ieee80211_hw *hw);
216 static void ath5k_stop(struct ieee80211_hw *hw);
217 static int ath5k_add_interface(struct ieee80211_hw *hw,
218                 struct ieee80211_if_init_conf *conf);
219 static void ath5k_remove_interface(struct ieee80211_hw *hw,
220                 struct ieee80211_if_init_conf *conf);
221 static int ath5k_config(struct ieee80211_hw *hw,
222                 struct ieee80211_conf *conf);
223 static int ath5k_config_interface(struct ieee80211_hw *hw,
224                 struct ieee80211_vif *vif,
225                 struct ieee80211_if_conf *conf);
226 static void ath5k_configure_filter(struct ieee80211_hw *hw,
227                 unsigned int changed_flags,
228                 unsigned int *new_flags,
229                 int mc_count, struct dev_mc_list *mclist);
230 static int ath5k_set_key(struct ieee80211_hw *hw,
231                 enum set_key_cmd cmd,
232                 const u8 *local_addr, const u8 *addr,
233                 struct ieee80211_key_conf *key);
234 static int ath5k_get_stats(struct ieee80211_hw *hw,
235                 struct ieee80211_low_level_stats *stats);
236 static int ath5k_get_tx_stats(struct ieee80211_hw *hw,
237                 struct ieee80211_tx_queue_stats *stats);
238 static u64 ath5k_get_tsf(struct ieee80211_hw *hw);
239 static void ath5k_reset_tsf(struct ieee80211_hw *hw);
240 static int ath5k_beacon_update(struct ieee80211_hw *hw,
241                 struct sk_buff *skb);
242
243 static struct ieee80211_ops ath5k_hw_ops = {
244         .tx             = ath5k_tx,
245         .start          = ath5k_start,
246         .stop           = ath5k_stop,
247         .add_interface  = ath5k_add_interface,
248         .remove_interface = ath5k_remove_interface,
249         .config         = ath5k_config,
250         .config_interface = ath5k_config_interface,
251         .configure_filter = ath5k_configure_filter,
252         .set_key        = ath5k_set_key,
253         .get_stats      = ath5k_get_stats,
254         .conf_tx        = NULL,
255         .get_tx_stats   = ath5k_get_tx_stats,
256         .get_tsf        = ath5k_get_tsf,
257         .reset_tsf      = ath5k_reset_tsf,
258 };
259
260 /*
261  * Prototypes - Internal functions
262  */
263 /* Attach detach */
264 static int      ath5k_attach(struct pci_dev *pdev,
265                         struct ieee80211_hw *hw);
266 static void     ath5k_detach(struct pci_dev *pdev,
267                         struct ieee80211_hw *hw);
268 /* Channel/mode setup */
269 static inline short ath5k_ieee2mhz(short chan);
270 static unsigned int ath5k_copy_channels(struct ath5k_hw *ah,
271                                 struct ieee80211_channel *channels,
272                                 unsigned int mode,
273                                 unsigned int max);
274 static int      ath5k_setup_bands(struct ieee80211_hw *hw);
275 static int      ath5k_chan_set(struct ath5k_softc *sc,
276                                 struct ieee80211_channel *chan);
277 static void     ath5k_setcurmode(struct ath5k_softc *sc,
278                                 unsigned int mode);
279 static void     ath5k_mode_setup(struct ath5k_softc *sc);
280
281 /* Descriptor setup */
282 static int      ath5k_desc_alloc(struct ath5k_softc *sc,
283                                 struct pci_dev *pdev);
284 static void     ath5k_desc_free(struct ath5k_softc *sc,
285                                 struct pci_dev *pdev);
286 /* Buffers setup */
287 static int      ath5k_rxbuf_setup(struct ath5k_softc *sc,
288                                 struct ath5k_buf *bf);
289 static int      ath5k_txbuf_setup(struct ath5k_softc *sc,
290                                 struct ath5k_buf *bf);
291 static inline void ath5k_txbuf_free(struct ath5k_softc *sc,
292                                 struct ath5k_buf *bf)
293 {
294         BUG_ON(!bf);
295         if (!bf->skb)
296                 return;
297         pci_unmap_single(sc->pdev, bf->skbaddr, bf->skb->len,
298                         PCI_DMA_TODEVICE);
299         dev_kfree_skb_any(bf->skb);
300         bf->skb = NULL;
301 }
302
303 /* Queues setup */
304 static struct   ath5k_txq *ath5k_txq_setup(struct ath5k_softc *sc,
305                                 int qtype, int subtype);
306 static int      ath5k_beaconq_setup(struct ath5k_hw *ah);
307 static int      ath5k_beaconq_config(struct ath5k_softc *sc);
308 static void     ath5k_txq_drainq(struct ath5k_softc *sc,
309                                 struct ath5k_txq *txq);
310 static void     ath5k_txq_cleanup(struct ath5k_softc *sc);
311 static void     ath5k_txq_release(struct ath5k_softc *sc);
312 /* Rx handling */
313 static int      ath5k_rx_start(struct ath5k_softc *sc);
314 static void     ath5k_rx_stop(struct ath5k_softc *sc);
315 static unsigned int ath5k_rx_decrypted(struct ath5k_softc *sc,
316                                         struct ath5k_desc *ds,
317                                         struct sk_buff *skb,
318                                         struct ath5k_rx_status *rs);
319 static void     ath5k_tasklet_rx(unsigned long data);
320 /* Tx handling */
321 static void     ath5k_tx_processq(struct ath5k_softc *sc,
322                                 struct ath5k_txq *txq);
323 static void     ath5k_tasklet_tx(unsigned long data);
324 /* Beacon handling */
325 static int      ath5k_beacon_setup(struct ath5k_softc *sc,
326                                         struct ath5k_buf *bf);
327 static void     ath5k_beacon_send(struct ath5k_softc *sc);
328 static void     ath5k_beacon_config(struct ath5k_softc *sc);
329 static void     ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
330
331 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
332 {
333         u64 tsf = ath5k_hw_get_tsf64(ah);
334
335         if ((tsf & 0x7fff) < rstamp)
336                 tsf -= 0x8000;
337
338         return (tsf & ~0x7fff) | rstamp;
339 }
340
341 /* Interrupt handling */
342 static int      ath5k_init(struct ath5k_softc *sc);
343 static int      ath5k_stop_locked(struct ath5k_softc *sc);
344 static int      ath5k_stop_hw(struct ath5k_softc *sc);
345 static irqreturn_t ath5k_intr(int irq, void *dev_id);
346 static void     ath5k_tasklet_reset(unsigned long data);
347
348 static void     ath5k_calibrate(unsigned long data);
349 /* LED functions */
350 static int      ath5k_init_leds(struct ath5k_softc *sc);
351 static void     ath5k_led_enable(struct ath5k_softc *sc);
352 static void     ath5k_led_off(struct ath5k_softc *sc);
353 static void     ath5k_unregister_leds(struct ath5k_softc *sc);
354
355 /*
356  * Module init/exit functions
357  */
358 static int __init
359 init_ath5k_pci(void)
360 {
361         int ret;
362
363         ath5k_debug_init();
364
365         ret = pci_register_driver(&ath5k_pci_driver);
366         if (ret) {
367                 printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
368                 return ret;
369         }
370
371         return 0;
372 }
373
374 static void __exit
375 exit_ath5k_pci(void)
376 {
377         pci_unregister_driver(&ath5k_pci_driver);
378
379         ath5k_debug_finish();
380 }
381
382 module_init(init_ath5k_pci);
383 module_exit(exit_ath5k_pci);
384
385
386 /********************\
387 * PCI Initialization *
388 \********************/
389
390 static const char *
391 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
392 {
393         const char *name = "xxxxx";
394         unsigned int i;
395
396         for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
397                 if (srev_names[i].sr_type != type)
398                         continue;
399
400                 if ((val & 0xf0) == srev_names[i].sr_val)
401                         name = srev_names[i].sr_name;
402
403                 if ((val & 0xff) == srev_names[i].sr_val) {
404                         name = srev_names[i].sr_name;
405                         break;
406                 }
407         }
408
409         return name;
410 }
411
412 static int __devinit
413 ath5k_pci_probe(struct pci_dev *pdev,
414                 const struct pci_device_id *id)
415 {
416         void __iomem *mem;
417         struct ath5k_softc *sc;
418         struct ieee80211_hw *hw;
419         int ret;
420         u8 csz;
421
422         ret = pci_enable_device(pdev);
423         if (ret) {
424                 dev_err(&pdev->dev, "can't enable device\n");
425                 goto err;
426         }
427
428         /* XXX 32-bit addressing only */
429         ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
430         if (ret) {
431                 dev_err(&pdev->dev, "32-bit DMA not available\n");
432                 goto err_dis;
433         }
434
435         /*
436          * Cache line size is used to size and align various
437          * structures used to communicate with the hardware.
438          */
439         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
440         if (csz == 0) {
441                 /*
442                  * Linux 2.4.18 (at least) writes the cache line size
443                  * register as a 16-bit wide register which is wrong.
444                  * We must have this setup properly for rx buffer
445                  * DMA to work so force a reasonable value here if it
446                  * comes up zero.
447                  */
448                 csz = L1_CACHE_BYTES / sizeof(u32);
449                 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
450         }
451         /*
452          * The default setting of latency timer yields poor results,
453          * set it to the value used by other systems.  It may be worth
454          * tweaking this setting more.
455          */
456         pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
457
458         /* Enable bus mastering */
459         pci_set_master(pdev);
460
461         /*
462          * Disable the RETRY_TIMEOUT register (0x41) to keep
463          * PCI Tx retries from interfering with C3 CPU state.
464          */
465         pci_write_config_byte(pdev, 0x41, 0);
466
467         ret = pci_request_region(pdev, 0, "ath5k");
468         if (ret) {
469                 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
470                 goto err_dis;
471         }
472
473         mem = pci_iomap(pdev, 0, 0);
474         if (!mem) {
475                 dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
476                 ret = -EIO;
477                 goto err_reg;
478         }
479
480         /*
481          * Allocate hw (mac80211 main struct)
482          * and hw->priv (driver private data)
483          */
484         hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
485         if (hw == NULL) {
486                 dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
487                 ret = -ENOMEM;
488                 goto err_map;
489         }
490
491         dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
492
493         /* Initialize driver private data */
494         SET_IEEE80211_DEV(hw, &pdev->dev);
495         hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
496                     IEEE80211_HW_SIGNAL_DBM |
497                     IEEE80211_HW_NOISE_DBM;
498
499         hw->wiphy->interface_modes =
500                 BIT(NL80211_IFTYPE_STATION) |
501                 BIT(NL80211_IFTYPE_ADHOC) |
502                 BIT(NL80211_IFTYPE_MESH_POINT);
503
504         hw->extra_tx_headroom = 2;
505         hw->channel_change_time = 5000;
506         sc = hw->priv;
507         sc->hw = hw;
508         sc->pdev = pdev;
509
510         ath5k_debug_init_device(sc);
511
512         /*
513          * Mark the device as detached to avoid processing
514          * interrupts until setup is complete.
515          */
516         __set_bit(ATH_STAT_INVALID, sc->status);
517
518         sc->iobase = mem; /* So we can unmap it on detach */
519         sc->cachelsz = csz * sizeof(u32); /* convert to bytes */
520         sc->opmode = NL80211_IFTYPE_STATION;
521         mutex_init(&sc->lock);
522         spin_lock_init(&sc->rxbuflock);
523         spin_lock_init(&sc->txbuflock);
524         spin_lock_init(&sc->block);
525
526         /* Set private data */
527         pci_set_drvdata(pdev, hw);
528
529         /* Setup interrupt handler */
530         ret = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
531         if (ret) {
532                 ATH5K_ERR(sc, "request_irq failed\n");
533                 goto err_free;
534         }
535
536         /* Initialize device */
537         sc->ah = ath5k_hw_attach(sc, id->driver_data);
538         if (IS_ERR(sc->ah)) {
539                 ret = PTR_ERR(sc->ah);
540                 goto err_irq;
541         }
542
543         /* Finish private driver data initialization */
544         ret = ath5k_attach(pdev, hw);
545         if (ret)
546                 goto err_ah;
547
548         ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
549                         ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
550                                         sc->ah->ah_mac_srev,
551                                         sc->ah->ah_phy_revision);
552
553         if (!sc->ah->ah_single_chip) {
554                 /* Single chip radio (!RF5111) */
555                 if (sc->ah->ah_radio_5ghz_revision &&
556                         !sc->ah->ah_radio_2ghz_revision) {
557                         /* No 5GHz support -> report 2GHz radio */
558                         if (!test_bit(AR5K_MODE_11A,
559                                 sc->ah->ah_capabilities.cap_mode)) {
560                                 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
561                                         ath5k_chip_name(AR5K_VERSION_RAD,
562                                                 sc->ah->ah_radio_5ghz_revision),
563                                                 sc->ah->ah_radio_5ghz_revision);
564                         /* No 2GHz support (5110 and some
565                          * 5Ghz only cards) -> report 5Ghz radio */
566                         } else if (!test_bit(AR5K_MODE_11B,
567                                 sc->ah->ah_capabilities.cap_mode)) {
568                                 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
569                                         ath5k_chip_name(AR5K_VERSION_RAD,
570                                                 sc->ah->ah_radio_5ghz_revision),
571                                                 sc->ah->ah_radio_5ghz_revision);
572                         /* Multiband radio */
573                         } else {
574                                 ATH5K_INFO(sc, "RF%s multiband radio found"
575                                         " (0x%x)\n",
576                                         ath5k_chip_name(AR5K_VERSION_RAD,
577                                                 sc->ah->ah_radio_5ghz_revision),
578                                                 sc->ah->ah_radio_5ghz_revision);
579                         }
580                 }
581                 /* Multi chip radio (RF5111 - RF2111) ->
582                  * report both 2GHz/5GHz radios */
583                 else if (sc->ah->ah_radio_5ghz_revision &&
584                                 sc->ah->ah_radio_2ghz_revision){
585                         ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
586                                 ath5k_chip_name(AR5K_VERSION_RAD,
587                                         sc->ah->ah_radio_5ghz_revision),
588                                         sc->ah->ah_radio_5ghz_revision);
589                         ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
590                                 ath5k_chip_name(AR5K_VERSION_RAD,
591                                         sc->ah->ah_radio_2ghz_revision),
592                                         sc->ah->ah_radio_2ghz_revision);
593                 }
594         }
595
596
597         /* ready to process interrupts */
598         __clear_bit(ATH_STAT_INVALID, sc->status);
599
600         return 0;
601 err_ah:
602         ath5k_hw_detach(sc->ah);
603 err_irq:
604         free_irq(pdev->irq, sc);
605 err_free:
606         ieee80211_free_hw(hw);
607 err_map:
608         pci_iounmap(pdev, mem);
609 err_reg:
610         pci_release_region(pdev, 0);
611 err_dis:
612         pci_disable_device(pdev);
613 err:
614         return ret;
615 }
616
617 static void __devexit
618 ath5k_pci_remove(struct pci_dev *pdev)
619 {
620         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
621         struct ath5k_softc *sc = hw->priv;
622
623         ath5k_debug_finish_device(sc);
624         ath5k_detach(pdev, hw);
625         ath5k_hw_detach(sc->ah);
626         free_irq(pdev->irq, sc);
627         pci_iounmap(pdev, sc->iobase);
628         pci_release_region(pdev, 0);
629         pci_disable_device(pdev);
630         ieee80211_free_hw(hw);
631 }
632
633 #ifdef CONFIG_PM
634 static int
635 ath5k_pci_suspend(struct pci_dev *pdev, pm_message_t state)
636 {
637         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
638         struct ath5k_softc *sc = hw->priv;
639
640         ath5k_led_off(sc);
641
642         ath5k_stop_hw(sc);
643
644         free_irq(pdev->irq, sc);
645         pci_save_state(pdev);
646         pci_disable_device(pdev);
647         pci_set_power_state(pdev, PCI_D3hot);
648
649         return 0;
650 }
651
652 static int
653 ath5k_pci_resume(struct pci_dev *pdev)
654 {
655         struct ieee80211_hw *hw = pci_get_drvdata(pdev);
656         struct ath5k_softc *sc = hw->priv;
657         struct ath5k_hw *ah = sc->ah;
658         int i, err;
659
660         pci_restore_state(pdev);
661
662         err = pci_enable_device(pdev);
663         if (err)
664                 return err;
665
666         /*
667          * Suspend/Resume resets the PCI configuration space, so we have to
668          * re-disable the RETRY_TIMEOUT register (0x41) to keep
669          * PCI Tx retries from interfering with C3 CPU state
670          */
671         pci_write_config_byte(pdev, 0x41, 0);
672
673         err = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
674         if (err) {
675                 ATH5K_ERR(sc, "request_irq failed\n");
676                 goto err_no_irq;
677         }
678
679         err = ath5k_init(sc);
680         if (err)
681                 goto err_irq;
682         ath5k_led_enable(sc);
683
684         /*
685          * Reset the key cache since some parts do not
686          * reset the contents on initial power up or resume.
687          *
688          * FIXME: This may need to be revisited when mac80211 becomes
689          *        aware of suspend/resume.
690          */
691         for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
692                 ath5k_hw_reset_key(ah, i);
693
694         return 0;
695 err_irq:
696         free_irq(pdev->irq, sc);
697 err_no_irq:
698         pci_disable_device(pdev);
699         return err;
700 }
701 #endif /* CONFIG_PM */
702
703
704 /***********************\
705 * Driver Initialization *
706 \***********************/
707
708 static int
709 ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
710 {
711         struct ath5k_softc *sc = hw->priv;
712         struct ath5k_hw *ah = sc->ah;
713         u8 mac[ETH_ALEN];
714         unsigned int i;
715         int ret;
716
717         ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
718
719         /*
720          * Check if the MAC has multi-rate retry support.
721          * We do this by trying to setup a fake extended
722          * descriptor.  MAC's that don't have support will
723          * return false w/o doing anything.  MAC's that do
724          * support it will return true w/o doing anything.
725          */
726         ret = ah->ah_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
727         if (ret < 0)
728                 goto err;
729         if (ret > 0)
730                 __set_bit(ATH_STAT_MRRETRY, sc->status);
731
732         /*
733          * Reset the key cache since some parts do not
734          * reset the contents on initial power up.
735          */
736         for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
737                 ath5k_hw_reset_key(ah, i);
738
739         /*
740          * Collect the channel list.  The 802.11 layer
741          * is resposible for filtering this list based
742          * on settings like the phy mode and regulatory
743          * domain restrictions.
744          */
745         ret = ath5k_setup_bands(hw);
746         if (ret) {
747                 ATH5K_ERR(sc, "can't get channels\n");
748                 goto err;
749         }
750
751         /* NB: setup here so ath5k_rate_update is happy */
752         if (test_bit(AR5K_MODE_11A, ah->ah_modes))
753                 ath5k_setcurmode(sc, AR5K_MODE_11A);
754         else
755                 ath5k_setcurmode(sc, AR5K_MODE_11B);
756
757         /*
758          * Allocate tx+rx descriptors and populate the lists.
759          */
760         ret = ath5k_desc_alloc(sc, pdev);
761         if (ret) {
762                 ATH5K_ERR(sc, "can't allocate descriptors\n");
763                 goto err;
764         }
765
766         /*
767          * Allocate hardware transmit queues: one queue for
768          * beacon frames and one data queue for each QoS
769          * priority.  Note that hw functions handle reseting
770          * these queues at the needed time.
771          */
772         ret = ath5k_beaconq_setup(ah);
773         if (ret < 0) {
774                 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
775                 goto err_desc;
776         }
777         sc->bhalq = ret;
778
779         sc->txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
780         if (IS_ERR(sc->txq)) {
781                 ATH5K_ERR(sc, "can't setup xmit queue\n");
782                 ret = PTR_ERR(sc->txq);
783                 goto err_bhal;
784         }
785
786         tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
787         tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
788         tasklet_init(&sc->restq, ath5k_tasklet_reset, (unsigned long)sc);
789         setup_timer(&sc->calib_tim, ath5k_calibrate, (unsigned long)sc);
790
791         ath5k_hw_get_lladdr(ah, mac);
792         SET_IEEE80211_PERM_ADDR(hw, mac);
793         /* All MAC address bits matter for ACKs */
794         memset(sc->bssidmask, 0xff, ETH_ALEN);
795         ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
796
797         ret = ieee80211_register_hw(hw);
798         if (ret) {
799                 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
800                 goto err_queues;
801         }
802
803         ath5k_init_leds(sc);
804
805         return 0;
806 err_queues:
807         ath5k_txq_release(sc);
808 err_bhal:
809         ath5k_hw_release_tx_queue(ah, sc->bhalq);
810 err_desc:
811         ath5k_desc_free(sc, pdev);
812 err:
813         return ret;
814 }
815
816 static void
817 ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
818 {
819         struct ath5k_softc *sc = hw->priv;
820
821         /*
822          * NB: the order of these is important:
823          * o call the 802.11 layer before detaching ath5k_hw to
824          *   insure callbacks into the driver to delete global
825          *   key cache entries can be handled
826          * o reclaim the tx queue data structures after calling
827          *   the 802.11 layer as we'll get called back to reclaim
828          *   node state and potentially want to use them
829          * o to cleanup the tx queues the hal is called, so detach
830          *   it last
831          * XXX: ??? detach ath5k_hw ???
832          * Other than that, it's straightforward...
833          */
834         ieee80211_unregister_hw(hw);
835         ath5k_desc_free(sc, pdev);
836         ath5k_txq_release(sc);
837         ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
838         ath5k_unregister_leds(sc);
839
840         /*
841          * NB: can't reclaim these until after ieee80211_ifdetach
842          * returns because we'll get called back to reclaim node
843          * state and potentially want to use them.
844          */
845 }
846
847
848
849
850 /********************\
851 * Channel/mode setup *
852 \********************/
853
854 /*
855  * Convert IEEE channel number to MHz frequency.
856  */
857 static inline short
858 ath5k_ieee2mhz(short chan)
859 {
860         if (chan <= 14 || chan >= 27)
861                 return ieee80211chan2mhz(chan);
862         else
863                 return 2212 + chan * 20;
864 }
865
866 static unsigned int
867 ath5k_copy_channels(struct ath5k_hw *ah,
868                 struct ieee80211_channel *channels,
869                 unsigned int mode,
870                 unsigned int max)
871 {
872         unsigned int i, count, size, chfreq, freq, ch;
873
874         if (!test_bit(mode, ah->ah_modes))
875                 return 0;
876
877         switch (mode) {
878         case AR5K_MODE_11A:
879         case AR5K_MODE_11A_TURBO:
880                 /* 1..220, but 2GHz frequencies are filtered by check_channel */
881                 size = 220 ;
882                 chfreq = CHANNEL_5GHZ;
883                 break;
884         case AR5K_MODE_11B:
885         case AR5K_MODE_11G:
886         case AR5K_MODE_11G_TURBO:
887                 size = 26;
888                 chfreq = CHANNEL_2GHZ;
889                 break;
890         default:
891                 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
892                 return 0;
893         }
894
895         for (i = 0, count = 0; i < size && max > 0; i++) {
896                 ch = i + 1 ;
897                 freq = ath5k_ieee2mhz(ch);
898
899                 /* Check if channel is supported by the chipset */
900                 if (!ath5k_channel_ok(ah, freq, chfreq))
901                         continue;
902
903                 /* Write channel info and increment counter */
904                 channels[count].center_freq = freq;
905                 channels[count].band = (chfreq == CHANNEL_2GHZ) ?
906                         IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
907                 switch (mode) {
908                 case AR5K_MODE_11A:
909                 case AR5K_MODE_11G:
910                         channels[count].hw_value = chfreq | CHANNEL_OFDM;
911                         break;
912                 case AR5K_MODE_11A_TURBO:
913                 case AR5K_MODE_11G_TURBO:
914                         channels[count].hw_value = chfreq |
915                                 CHANNEL_OFDM | CHANNEL_TURBO;
916                         break;
917                 case AR5K_MODE_11B:
918                         channels[count].hw_value = CHANNEL_B;
919                 }
920
921                 count++;
922                 max--;
923         }
924
925         return count;
926 }
927
928 static void
929 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
930 {
931         u8 i;
932
933         for (i = 0; i < AR5K_MAX_RATES; i++)
934                 sc->rate_idx[b->band][i] = -1;
935
936         for (i = 0; i < b->n_bitrates; i++) {
937                 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
938                 if (b->bitrates[i].hw_value_short)
939                         sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
940         }
941 }
942
943 static int
944 ath5k_setup_bands(struct ieee80211_hw *hw)
945 {
946         struct ath5k_softc *sc = hw->priv;
947         struct ath5k_hw *ah = sc->ah;
948         struct ieee80211_supported_band *sband;
949         int max_c, count_c = 0;
950         int i;
951
952         BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
953         max_c = ARRAY_SIZE(sc->channels);
954
955         /* 2GHz band */
956         sband = &sc->sbands[IEEE80211_BAND_2GHZ];
957         sband->band = IEEE80211_BAND_2GHZ;
958         sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
959
960         if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
961                 /* G mode */
962                 memcpy(sband->bitrates, &ath5k_rates[0],
963                        sizeof(struct ieee80211_rate) * 12);
964                 sband->n_bitrates = 12;
965
966                 sband->channels = sc->channels;
967                 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
968                                         AR5K_MODE_11G, max_c);
969
970                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
971                 count_c = sband->n_channels;
972                 max_c -= count_c;
973         } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
974                 /* B mode */
975                 memcpy(sband->bitrates, &ath5k_rates[0],
976                        sizeof(struct ieee80211_rate) * 4);
977                 sband->n_bitrates = 4;
978
979                 /* 5211 only supports B rates and uses 4bit rate codes
980                  * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
981                  * fix them up here:
982                  */
983                 if (ah->ah_version == AR5K_AR5211) {
984                         for (i = 0; i < 4; i++) {
985                                 sband->bitrates[i].hw_value =
986                                         sband->bitrates[i].hw_value & 0xF;
987                                 sband->bitrates[i].hw_value_short =
988                                         sband->bitrates[i].hw_value_short & 0xF;
989                         }
990                 }
991
992                 sband->channels = sc->channels;
993                 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
994                                         AR5K_MODE_11B, max_c);
995
996                 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
997                 count_c = sband->n_channels;
998                 max_c -= count_c;
999         }
1000         ath5k_setup_rate_idx(sc, sband);
1001
1002         /* 5GHz band, A mode */
1003         if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
1004                 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
1005                 sband->band = IEEE80211_BAND_5GHZ;
1006                 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
1007
1008                 memcpy(sband->bitrates, &ath5k_rates[4],
1009                        sizeof(struct ieee80211_rate) * 8);
1010                 sband->n_bitrates = 8;
1011
1012                 sband->channels = &sc->channels[count_c];
1013                 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
1014                                         AR5K_MODE_11A, max_c);
1015
1016                 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
1017         }
1018         ath5k_setup_rate_idx(sc, sband);
1019
1020         ath5k_debug_dump_bands(sc);
1021
1022         return 0;
1023 }
1024
1025 /*
1026  * Set/change channels.  If the channel is really being changed,
1027  * it's done by reseting the chip.  To accomplish this we must
1028  * first cleanup any pending DMA, then restart stuff after a la
1029  * ath5k_init.
1030  */
1031 static int
1032 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
1033 {
1034         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "(%u MHz) -> (%u MHz)\n",
1035                 sc->curchan->center_freq, chan->center_freq);
1036
1037         if (chan->center_freq != sc->curchan->center_freq ||
1038                 chan->hw_value != sc->curchan->hw_value) {
1039
1040                 sc->curchan = chan;
1041                 sc->curband = &sc->sbands[chan->band];
1042
1043                 /*
1044                  * To switch channels clear any pending DMA operations;
1045                  * wait long enough for the RX fifo to drain, reset the
1046                  * hardware at the new frequency, and then re-enable
1047                  * the relevant bits of the h/w.
1048                  */
1049                 return ath5k_reset(sc, true, true);
1050         }
1051
1052         return 0;
1053 }
1054
1055 static void
1056 ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
1057 {
1058         sc->curmode = mode;
1059
1060         if (mode == AR5K_MODE_11A) {
1061                 sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
1062         } else {
1063                 sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
1064         }
1065 }
1066
1067 static void
1068 ath5k_mode_setup(struct ath5k_softc *sc)
1069 {
1070         struct ath5k_hw *ah = sc->ah;
1071         u32 rfilt;
1072
1073         /* configure rx filter */
1074         rfilt = sc->filter_flags;
1075         ath5k_hw_set_rx_filter(ah, rfilt);
1076
1077         if (ath5k_hw_hasbssidmask(ah))
1078                 ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
1079
1080         /* configure operational mode */
1081         ath5k_hw_set_opmode(ah);
1082
1083         ath5k_hw_set_mcast_filter(ah, 0, 0);
1084         ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
1085 }
1086
1087 static inline int
1088 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
1089 {
1090         WARN_ON(hw_rix < 0 || hw_rix > AR5K_MAX_RATES);
1091         return sc->rate_idx[sc->curband->band][hw_rix];
1092 }
1093
1094 /***************\
1095 * Buffers setup *
1096 \***************/
1097
1098 static int
1099 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1100 {
1101         struct ath5k_hw *ah = sc->ah;
1102         struct sk_buff *skb = bf->skb;
1103         struct ath5k_desc *ds;
1104
1105         if (likely(skb == NULL)) {
1106                 unsigned int off;
1107
1108                 /*
1109                  * Allocate buffer with headroom_needed space for the
1110                  * fake physical layer header at the start.
1111                  */
1112                 skb = dev_alloc_skb(sc->rxbufsize + sc->cachelsz - 1);
1113                 if (unlikely(skb == NULL)) {
1114                         ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
1115                                         sc->rxbufsize + sc->cachelsz - 1);
1116                         return -ENOMEM;
1117                 }
1118                 /*
1119                  * Cache-line-align.  This is important (for the
1120                  * 5210 at least) as not doing so causes bogus data
1121                  * in rx'd frames.
1122                  */
1123                 off = ((unsigned long)skb->data) % sc->cachelsz;
1124                 if (off != 0)
1125                         skb_reserve(skb, sc->cachelsz - off);
1126
1127                 bf->skb = skb;
1128                 bf->skbaddr = pci_map_single(sc->pdev,
1129                         skb->data, sc->rxbufsize, PCI_DMA_FROMDEVICE);
1130                 if (unlikely(pci_dma_mapping_error(sc->pdev, bf->skbaddr))) {
1131                         ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
1132                         dev_kfree_skb(skb);
1133                         bf->skb = NULL;
1134                         return -ENOMEM;
1135                 }
1136         }
1137
1138         /*
1139          * Setup descriptors.  For receive we always terminate
1140          * the descriptor list with a self-linked entry so we'll
1141          * not get overrun under high load (as can happen with a
1142          * 5212 when ANI processing enables PHY error frames).
1143          *
1144          * To insure the last descriptor is self-linked we create
1145          * each descriptor as self-linked and add it to the end.  As
1146          * each additional descriptor is added the previous self-linked
1147          * entry is ``fixed'' naturally.  This should be safe even
1148          * if DMA is happening.  When processing RX interrupts we
1149          * never remove/process the last, self-linked, entry on the
1150          * descriptor list.  This insures the hardware always has
1151          * someplace to write a new frame.
1152          */
1153         ds = bf->desc;
1154         ds->ds_link = bf->daddr;        /* link to self */
1155         ds->ds_data = bf->skbaddr;
1156         ah->ah_setup_rx_desc(ah, ds,
1157                 skb_tailroom(skb),      /* buffer size */
1158                 0);
1159
1160         if (sc->rxlink != NULL)
1161                 *sc->rxlink = bf->daddr;
1162         sc->rxlink = &ds->ds_link;
1163         return 0;
1164 }
1165
1166 static int
1167 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1168 {
1169         struct ath5k_hw *ah = sc->ah;
1170         struct ath5k_txq *txq = sc->txq;
1171         struct ath5k_desc *ds = bf->desc;
1172         struct sk_buff *skb = bf->skb;
1173         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1174         unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
1175         int ret;
1176
1177         flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
1178
1179         /* XXX endianness */
1180         bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
1181                         PCI_DMA_TODEVICE);
1182
1183         if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1184                 flags |= AR5K_TXDESC_NOACK;
1185
1186         pktlen = skb->len;
1187
1188         if (info->control.hw_key) {
1189                 keyidx = info->control.hw_key->hw_key_idx;
1190                 pktlen += info->control.icv_len;
1191         }
1192         ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
1193                 ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
1194                 (sc->power_level * 2),
1195                 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1196                 info->control.retry_limit, keyidx, 0, flags, 0, 0);
1197         if (ret)
1198                 goto err_unmap;
1199
1200         ds->ds_link = 0;
1201         ds->ds_data = bf->skbaddr;
1202
1203         spin_lock_bh(&txq->lock);
1204         list_add_tail(&bf->list, &txq->q);
1205         sc->tx_stats[txq->qnum].len++;
1206         if (txq->link == NULL) /* is this first packet? */
1207                 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
1208         else /* no, so only link it */
1209                 *txq->link = bf->daddr;
1210
1211         txq->link = &ds->ds_link;
1212         ath5k_hw_start_tx_dma(ah, txq->qnum);
1213         mmiowb();
1214         spin_unlock_bh(&txq->lock);
1215
1216         return 0;
1217 err_unmap:
1218         pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
1219         return ret;
1220 }
1221
1222 /*******************\
1223 * Descriptors setup *
1224 \*******************/
1225
1226 static int
1227 ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
1228 {
1229         struct ath5k_desc *ds;
1230         struct ath5k_buf *bf;
1231         dma_addr_t da;
1232         unsigned int i;
1233         int ret;
1234
1235         /* allocate descriptors */
1236         sc->desc_len = sizeof(struct ath5k_desc) *
1237                         (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
1238         sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr);
1239         if (sc->desc == NULL) {
1240                 ATH5K_ERR(sc, "can't allocate descriptors\n");
1241                 ret = -ENOMEM;
1242                 goto err;
1243         }
1244         ds = sc->desc;
1245         da = sc->desc_daddr;
1246         ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
1247                 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
1248
1249         bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
1250                         sizeof(struct ath5k_buf), GFP_KERNEL);
1251         if (bf == NULL) {
1252                 ATH5K_ERR(sc, "can't allocate bufptr\n");
1253                 ret = -ENOMEM;
1254                 goto err_free;
1255         }
1256         sc->bufptr = bf;
1257
1258         INIT_LIST_HEAD(&sc->rxbuf);
1259         for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
1260                 bf->desc = ds;
1261                 bf->daddr = da;
1262                 list_add_tail(&bf->list, &sc->rxbuf);
1263         }
1264
1265         INIT_LIST_HEAD(&sc->txbuf);
1266         sc->txbuf_len = ATH_TXBUF;
1267         for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
1268                         da += sizeof(*ds)) {
1269                 bf->desc = ds;
1270                 bf->daddr = da;
1271                 list_add_tail(&bf->list, &sc->txbuf);
1272         }
1273
1274         /* beacon buffer */
1275         bf->desc = ds;
1276         bf->daddr = da;
1277         sc->bbuf = bf;
1278
1279         return 0;
1280 err_free:
1281         pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
1282 err:
1283         sc->desc = NULL;
1284         return ret;
1285 }
1286
1287 static void
1288 ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev)
1289 {
1290         struct ath5k_buf *bf;
1291
1292         ath5k_txbuf_free(sc, sc->bbuf);
1293         list_for_each_entry(bf, &sc->txbuf, list)
1294                 ath5k_txbuf_free(sc, bf);
1295         list_for_each_entry(bf, &sc->rxbuf, list)
1296                 ath5k_txbuf_free(sc, bf);
1297
1298         /* Free memory associated with all descriptors */
1299         pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
1300
1301         kfree(sc->bufptr);
1302         sc->bufptr = NULL;
1303 }
1304
1305
1306
1307
1308
1309 /**************\
1310 * Queues setup *
1311 \**************/
1312
1313 static struct ath5k_txq *
1314 ath5k_txq_setup(struct ath5k_softc *sc,
1315                 int qtype, int subtype)
1316 {
1317         struct ath5k_hw *ah = sc->ah;
1318         struct ath5k_txq *txq;
1319         struct ath5k_txq_info qi = {
1320                 .tqi_subtype = subtype,
1321                 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
1322                 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
1323                 .tqi_cw_max = AR5K_TXQ_USEDEFAULT
1324         };
1325         int qnum;
1326
1327         /*
1328          * Enable interrupts only for EOL and DESC conditions.
1329          * We mark tx descriptors to receive a DESC interrupt
1330          * when a tx queue gets deep; otherwise waiting for the
1331          * EOL to reap descriptors.  Note that this is done to
1332          * reduce interrupt load and this only defers reaping
1333          * descriptors, never transmitting frames.  Aside from
1334          * reducing interrupts this also permits more concurrency.
1335          * The only potential downside is if the tx queue backs
1336          * up in which case the top half of the kernel may backup
1337          * due to a lack of tx descriptors.
1338          */
1339         qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
1340                                 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
1341         qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
1342         if (qnum < 0) {
1343                 /*
1344                  * NB: don't print a message, this happens
1345                  * normally on parts with too few tx queues
1346                  */
1347                 return ERR_PTR(qnum);
1348         }
1349         if (qnum >= ARRAY_SIZE(sc->txqs)) {
1350                 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
1351                         qnum, ARRAY_SIZE(sc->txqs));
1352                 ath5k_hw_release_tx_queue(ah, qnum);
1353                 return ERR_PTR(-EINVAL);
1354         }
1355         txq = &sc->txqs[qnum];
1356         if (!txq->setup) {
1357                 txq->qnum = qnum;
1358                 txq->link = NULL;
1359                 INIT_LIST_HEAD(&txq->q);
1360                 spin_lock_init(&txq->lock);
1361                 txq->setup = true;
1362         }
1363         return &sc->txqs[qnum];
1364 }
1365
1366 static int
1367 ath5k_beaconq_setup(struct ath5k_hw *ah)
1368 {
1369         struct ath5k_txq_info qi = {
1370                 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
1371                 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
1372                 .tqi_cw_max = AR5K_TXQ_USEDEFAULT,
1373                 /* NB: for dynamic turbo, don't enable any other interrupts */
1374                 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
1375         };
1376
1377         return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
1378 }
1379
1380 static int
1381 ath5k_beaconq_config(struct ath5k_softc *sc)
1382 {
1383         struct ath5k_hw *ah = sc->ah;
1384         struct ath5k_txq_info qi;
1385         int ret;
1386
1387         ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
1388         if (ret)
1389                 return ret;
1390         if (sc->opmode == NL80211_IFTYPE_AP ||
1391                 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1392                 /*
1393                  * Always burst out beacon and CAB traffic
1394                  * (aifs = cwmin = cwmax = 0)
1395                  */
1396                 qi.tqi_aifs = 0;
1397                 qi.tqi_cw_min = 0;
1398                 qi.tqi_cw_max = 0;
1399         } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
1400                 /*
1401                  * Adhoc mode; backoff between 0 and (2 * cw_min).
1402                  */
1403                 qi.tqi_aifs = 0;
1404                 qi.tqi_cw_min = 0;
1405                 qi.tqi_cw_max = 2 * ah->ah_cw_min;
1406         }
1407
1408         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1409                 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1410                 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
1411
1412         ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
1413         if (ret) {
1414                 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
1415                         "hardware queue!\n", __func__);
1416                 return ret;
1417         }
1418
1419         return ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */;
1420 }
1421
1422 static void
1423 ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1424 {
1425         struct ath5k_buf *bf, *bf0;
1426
1427         /*
1428          * NB: this assumes output has been stopped and
1429          *     we do not need to block ath5k_tx_tasklet
1430          */
1431         spin_lock_bh(&txq->lock);
1432         list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1433                 ath5k_debug_printtxbuf(sc, bf);
1434
1435                 ath5k_txbuf_free(sc, bf);
1436
1437                 spin_lock_bh(&sc->txbuflock);
1438                 sc->tx_stats[txq->qnum].len--;
1439                 list_move_tail(&bf->list, &sc->txbuf);
1440                 sc->txbuf_len++;
1441                 spin_unlock_bh(&sc->txbuflock);
1442         }
1443         txq->link = NULL;
1444         spin_unlock_bh(&txq->lock);
1445 }
1446
1447 /*
1448  * Drain the transmit queues and reclaim resources.
1449  */
1450 static void
1451 ath5k_txq_cleanup(struct ath5k_softc *sc)
1452 {
1453         struct ath5k_hw *ah = sc->ah;
1454         unsigned int i;
1455
1456         /* XXX return value */
1457         if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
1458                 /* don't touch the hardware if marked invalid */
1459                 ath5k_hw_stop_tx_dma(ah, sc->bhalq);
1460                 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
1461                         ath5k_hw_get_txdp(ah, sc->bhalq));
1462                 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1463                         if (sc->txqs[i].setup) {
1464                                 ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
1465                                 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
1466                                         "link %p\n",
1467                                         sc->txqs[i].qnum,
1468                                         ath5k_hw_get_txdp(ah,
1469                                                         sc->txqs[i].qnum),
1470                                         sc->txqs[i].link);
1471                         }
1472         }
1473         ieee80211_wake_queues(sc->hw); /* XXX move to callers */
1474
1475         for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1476                 if (sc->txqs[i].setup)
1477                         ath5k_txq_drainq(sc, &sc->txqs[i]);
1478 }
1479
1480 static void
1481 ath5k_txq_release(struct ath5k_softc *sc)
1482 {
1483         struct ath5k_txq *txq = sc->txqs;
1484         unsigned int i;
1485
1486         for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1487                 if (txq->setup) {
1488                         ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1489                         txq->setup = false;
1490                 }
1491 }
1492
1493
1494
1495
1496 /*************\
1497 * RX Handling *
1498 \*************/
1499
1500 /*
1501  * Enable the receive h/w following a reset.
1502  */
1503 static int
1504 ath5k_rx_start(struct ath5k_softc *sc)
1505 {
1506         struct ath5k_hw *ah = sc->ah;
1507         struct ath5k_buf *bf;
1508         int ret;
1509
1510         sc->rxbufsize = roundup(IEEE80211_MAX_LEN, sc->cachelsz);
1511
1512         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rxbufsize %u\n",
1513                 sc->cachelsz, sc->rxbufsize);
1514
1515         sc->rxlink = NULL;
1516
1517         spin_lock_bh(&sc->rxbuflock);
1518         list_for_each_entry(bf, &sc->rxbuf, list) {
1519                 ret = ath5k_rxbuf_setup(sc, bf);
1520                 if (ret != 0) {
1521                         spin_unlock_bh(&sc->rxbuflock);
1522                         goto err;
1523                 }
1524         }
1525         bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1526         spin_unlock_bh(&sc->rxbuflock);
1527
1528         ath5k_hw_set_rxdp(ah, bf->daddr);
1529         ath5k_hw_start_rx_dma(ah);      /* enable recv descriptors */
1530         ath5k_mode_setup(sc);           /* set filters, etc. */
1531         ath5k_hw_start_rx_pcu(ah);      /* re-enable PCU/DMA engine */
1532
1533         return 0;
1534 err:
1535         return ret;
1536 }
1537
1538 /*
1539  * Disable the receive h/w in preparation for a reset.
1540  */
1541 static void
1542 ath5k_rx_stop(struct ath5k_softc *sc)
1543 {
1544         struct ath5k_hw *ah = sc->ah;
1545
1546         ath5k_hw_stop_rx_pcu(ah);       /* disable PCU */
1547         ath5k_hw_set_rx_filter(ah, 0);  /* clear recv filter */
1548         ath5k_hw_stop_rx_dma(ah);       /* disable DMA engine */
1549
1550         ath5k_debug_printrxbuffs(sc, ah);
1551
1552         sc->rxlink = NULL;              /* just in case */
1553 }
1554
1555 static unsigned int
1556 ath5k_rx_decrypted(struct ath5k_softc *sc, struct ath5k_desc *ds,
1557                 struct sk_buff *skb, struct ath5k_rx_status *rs)
1558 {
1559         struct ieee80211_hdr *hdr = (void *)skb->data;
1560         unsigned int keyix, hlen;
1561
1562         if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1563                         rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1564                 return RX_FLAG_DECRYPTED;
1565
1566         /* Apparently when a default key is used to decrypt the packet
1567            the hw does not set the index used to decrypt.  In such cases
1568            get the index from the packet. */
1569         hlen = ieee80211_hdrlen(hdr->frame_control);
1570         if (ieee80211_has_protected(hdr->frame_control) &&
1571             !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1572             skb->len >= hlen + 4) {
1573                 keyix = skb->data[hlen + 3] >> 6;
1574
1575                 if (test_bit(keyix, sc->keymap))
1576                         return RX_FLAG_DECRYPTED;
1577         }
1578
1579         return 0;
1580 }
1581
1582
1583 static void
1584 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1585                      struct ieee80211_rx_status *rxs)
1586 {
1587         u64 tsf, bc_tstamp;
1588         u32 hw_tu;
1589         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1590
1591         if (ieee80211_is_beacon(mgmt->frame_control) &&
1592             le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1593             memcmp(mgmt->bssid, sc->ah->ah_bssid, ETH_ALEN) == 0) {
1594                 /*
1595                  * Received an IBSS beacon with the same BSSID. Hardware *must*
1596                  * have updated the local TSF. We have to work around various
1597                  * hardware bugs, though...
1598                  */
1599                 tsf = ath5k_hw_get_tsf64(sc->ah);
1600                 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1601                 hw_tu = TSF_TO_TU(tsf);
1602
1603                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1604                         "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1605                         (unsigned long long)bc_tstamp,
1606                         (unsigned long long)rxs->mactime,
1607                         (unsigned long long)(rxs->mactime - bc_tstamp),
1608                         (unsigned long long)tsf);
1609
1610                 /*
1611                  * Sometimes the HW will give us a wrong tstamp in the rx
1612                  * status, causing the timestamp extension to go wrong.
1613                  * (This seems to happen especially with beacon frames bigger
1614                  * than 78 byte (incl. FCS))
1615                  * But we know that the receive timestamp must be later than the
1616                  * timestamp of the beacon since HW must have synced to that.
1617                  *
1618                  * NOTE: here we assume mactime to be after the frame was
1619                  * received, not like mac80211 which defines it at the start.
1620                  */
1621                 if (bc_tstamp > rxs->mactime) {
1622                         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1623                                 "fixing mactime from %llx to %llx\n",
1624                                 (unsigned long long)rxs->mactime,
1625                                 (unsigned long long)tsf);
1626                         rxs->mactime = tsf;
1627                 }
1628
1629                 /*
1630                  * Local TSF might have moved higher than our beacon timers,
1631                  * in that case we have to update them to continue sending
1632                  * beacons. This also takes care of synchronizing beacon sending
1633                  * times with other stations.
1634                  */
1635                 if (hw_tu >= sc->nexttbtt)
1636                         ath5k_beacon_update_timers(sc, bc_tstamp);
1637         }
1638 }
1639
1640
1641 static void
1642 ath5k_tasklet_rx(unsigned long data)
1643 {
1644         struct ieee80211_rx_status rxs = {};
1645         struct ath5k_rx_status rs = {};
1646         struct sk_buff *skb;
1647         struct ath5k_softc *sc = (void *)data;
1648         struct ath5k_buf *bf, *bf_last;
1649         struct ath5k_desc *ds;
1650         int ret;
1651         int hdrlen;
1652         int pad;
1653
1654         spin_lock(&sc->rxbuflock);
1655         if (list_empty(&sc->rxbuf)) {
1656                 ATH5K_WARN(sc, "empty rx buf pool\n");
1657                 goto unlock;
1658         }
1659         bf_last = list_entry(sc->rxbuf.prev, struct ath5k_buf, list);
1660         do {
1661                 rxs.flag = 0;
1662
1663                 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1664                 BUG_ON(bf->skb == NULL);
1665                 skb = bf->skb;
1666                 ds = bf->desc;
1667
1668                 /*
1669                  * last buffer must not be freed to ensure proper hardware
1670                  * function. When the hardware finishes also a packet next to
1671                  * it, we are sure, it doesn't use it anymore and we can go on.
1672                  */
1673                 if (bf_last == bf)
1674                         bf->flags |= 1;
1675                 if (bf->flags) {
1676                         struct ath5k_buf *bf_next = list_entry(bf->list.next,
1677                                         struct ath5k_buf, list);
1678                         ret = sc->ah->ah_proc_rx_desc(sc->ah, bf_next->desc,
1679                                         &rs);
1680                         if (ret)
1681                                 break;
1682                         bf->flags &= ~1;
1683                         /* skip the overwritten one (even status is martian) */
1684                         goto next;
1685                 }
1686
1687                 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1688                 if (unlikely(ret == -EINPROGRESS))
1689                         break;
1690                 else if (unlikely(ret)) {
1691                         ATH5K_ERR(sc, "error in processing rx descriptor\n");
1692                         spin_unlock(&sc->rxbuflock);
1693                         return;
1694                 }
1695
1696                 if (unlikely(rs.rs_more)) {
1697                         ATH5K_WARN(sc, "unsupported jumbo\n");
1698                         goto next;
1699                 }
1700
1701                 if (unlikely(rs.rs_status)) {
1702                         if (rs.rs_status & AR5K_RXERR_PHY)
1703                                 goto next;
1704                         if (rs.rs_status & AR5K_RXERR_DECRYPT) {
1705                                 /*
1706                                  * Decrypt error.  If the error occurred
1707                                  * because there was no hardware key, then
1708                                  * let the frame through so the upper layers
1709                                  * can process it.  This is necessary for 5210
1710                                  * parts which have no way to setup a ``clear''
1711                                  * key cache entry.
1712                                  *
1713                                  * XXX do key cache faulting
1714                                  */
1715                                 if (rs.rs_keyix == AR5K_RXKEYIX_INVALID &&
1716                                     !(rs.rs_status & AR5K_RXERR_CRC))
1717                                         goto accept;
1718                         }
1719                         if (rs.rs_status & AR5K_RXERR_MIC) {
1720                                 rxs.flag |= RX_FLAG_MMIC_ERROR;
1721                                 goto accept;
1722                         }
1723
1724                         /* let crypto-error packets fall through in MNTR */
1725                         if ((rs.rs_status &
1726                                 ~(AR5K_RXERR_DECRYPT|AR5K_RXERR_MIC)) ||
1727                                         sc->opmode != NL80211_IFTYPE_MONITOR)
1728                                 goto next;
1729                 }
1730 accept:
1731                 pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
1732                                 PCI_DMA_FROMDEVICE);
1733                 bf->skb = NULL;
1734
1735                 skb_put(skb, rs.rs_datalen);
1736
1737                 /*
1738                  * the hardware adds a padding to 4 byte boundaries between
1739                  * the header and the payload data if the header length is
1740                  * not multiples of 4 - remove it
1741                  */
1742                 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1743                 if (hdrlen & 3) {
1744                         pad = hdrlen % 4;
1745                         memmove(skb->data + pad, skb->data, hdrlen);
1746                         skb_pull(skb, pad);
1747                 }
1748
1749                 /*
1750                  * always extend the mac timestamp, since this information is
1751                  * also needed for proper IBSS merging.
1752                  *
1753                  * XXX: it might be too late to do it here, since rs_tstamp is
1754                  * 15bit only. that means TSF extension has to be done within
1755                  * 32768usec (about 32ms). it might be necessary to move this to
1756                  * the interrupt handler, like it is done in madwifi.
1757                  *
1758                  * Unfortunately we don't know when the hardware takes the rx
1759                  * timestamp (beginning of phy frame, data frame, end of rx?).
1760                  * The only thing we know is that it is hardware specific...
1761                  * On AR5213 it seems the rx timestamp is at the end of the
1762                  * frame, but i'm not sure.
1763                  *
1764                  * NOTE: mac80211 defines mactime at the beginning of the first
1765                  * data symbol. Since we don't have any time references it's
1766                  * impossible to comply to that. This affects IBSS merge only
1767                  * right now, so it's not too bad...
1768                  */
1769                 rxs.mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp);
1770                 rxs.flag |= RX_FLAG_TSFT;
1771
1772                 rxs.freq = sc->curchan->center_freq;
1773                 rxs.band = sc->curband->band;
1774
1775                 rxs.noise = sc->ah->ah_noise_floor;
1776                 rxs.signal = rxs.noise + rs.rs_rssi;
1777                 rxs.qual = rs.rs_rssi * 100 / 64;
1778
1779                 rxs.antenna = rs.rs_antenna;
1780                 rxs.rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);
1781                 rxs.flag |= ath5k_rx_decrypted(sc, ds, skb, &rs);
1782
1783                 if (rxs.rate_idx >= 0 && rs.rs_rate ==
1784                     sc->curband->bitrates[rxs.rate_idx].hw_value_short)
1785                         rxs.flag |= RX_FLAG_SHORTPRE;
1786
1787                 ath5k_debug_dump_skb(sc, skb, "RX  ", 0);
1788
1789                 /* check beacons in IBSS mode */
1790                 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1791                         ath5k_check_ibss_tsf(sc, skb, &rxs);
1792
1793                 __ieee80211_rx(sc->hw, skb, &rxs);
1794 next:
1795                 list_move_tail(&bf->list, &sc->rxbuf);
1796         } while (ath5k_rxbuf_setup(sc, bf) == 0);
1797 unlock:
1798         spin_unlock(&sc->rxbuflock);
1799 }
1800
1801
1802
1803
1804 /*************\
1805 * TX Handling *
1806 \*************/
1807
1808 static void
1809 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1810 {
1811         struct ath5k_tx_status ts = {};
1812         struct ath5k_buf *bf, *bf0;
1813         struct ath5k_desc *ds;
1814         struct sk_buff *skb;
1815         struct ieee80211_tx_info *info;
1816         int ret;
1817
1818         spin_lock(&txq->lock);
1819         list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1820                 ds = bf->desc;
1821
1822                 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1823                 if (unlikely(ret == -EINPROGRESS))
1824                         break;
1825                 else if (unlikely(ret)) {
1826                         ATH5K_ERR(sc, "error %d while processing queue %u\n",
1827                                 ret, txq->qnum);
1828                         break;
1829                 }
1830
1831                 skb = bf->skb;
1832                 info = IEEE80211_SKB_CB(skb);
1833                 bf->skb = NULL;
1834
1835                 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
1836                                 PCI_DMA_TODEVICE);
1837
1838                 info->status.retry_count = ts.ts_shortretry + ts.ts_longretry / 6;
1839                 if (unlikely(ts.ts_status)) {
1840                         sc->ll_stats.dot11ACKFailureCount++;
1841                         if (ts.ts_status & AR5K_TXERR_XRETRY)
1842                                 info->status.excessive_retries = 1;
1843                         else if (ts.ts_status & AR5K_TXERR_FILT)
1844                                 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1845                 } else {
1846                         info->flags |= IEEE80211_TX_STAT_ACK;
1847                         info->status.ack_signal = ts.ts_rssi;
1848                 }
1849
1850                 ieee80211_tx_status(sc->hw, skb);
1851                 sc->tx_stats[txq->qnum].count++;
1852
1853                 spin_lock(&sc->txbuflock);
1854                 sc->tx_stats[txq->qnum].len--;
1855                 list_move_tail(&bf->list, &sc->txbuf);
1856                 sc->txbuf_len++;
1857                 spin_unlock(&sc->txbuflock);
1858         }
1859         if (likely(list_empty(&txq->q)))
1860                 txq->link = NULL;
1861         spin_unlock(&txq->lock);
1862         if (sc->txbuf_len > ATH_TXBUF / 5)
1863                 ieee80211_wake_queues(sc->hw);
1864 }
1865
1866 static void
1867 ath5k_tasklet_tx(unsigned long data)
1868 {
1869         struct ath5k_softc *sc = (void *)data;
1870
1871         ath5k_tx_processq(sc, sc->txq);
1872 }
1873
1874
1875 /*****************\
1876 * Beacon handling *
1877 \*****************/
1878
1879 /*
1880  * Setup the beacon frame for transmit.
1881  */
1882 static int
1883 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1884 {
1885         struct sk_buff *skb = bf->skb;
1886         struct  ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1887         struct ath5k_hw *ah = sc->ah;
1888         struct ath5k_desc *ds;
1889         int ret, antenna = 0;
1890         u32 flags;
1891
1892         bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
1893                         PCI_DMA_TODEVICE);
1894         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
1895                         "skbaddr %llx\n", skb, skb->data, skb->len,
1896                         (unsigned long long)bf->skbaddr);
1897         if (pci_dma_mapping_error(sc->pdev, bf->skbaddr)) {
1898                 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
1899                 return -EIO;
1900         }
1901
1902         ds = bf->desc;
1903
1904         flags = AR5K_TXDESC_NOACK;
1905         if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
1906                 ds->ds_link = bf->daddr;        /* self-linked */
1907                 flags |= AR5K_TXDESC_VEOL;
1908                 /*
1909                  * Let hardware handle antenna switching if txantenna is not set
1910                  */
1911         } else {
1912                 ds->ds_link = 0;
1913                 /*
1914                  * Switch antenna every 4 beacons if txantenna is not set
1915                  * XXX assumes two antennas
1916                  */
1917                 if (antenna == 0)
1918                         antenna = sc->bsent & 4 ? 2 : 1;
1919         }
1920
1921         ds->ds_data = bf->skbaddr;
1922         ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
1923                         ieee80211_get_hdrlen_from_skb(skb),
1924                         AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
1925                         ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1926                         1, AR5K_TXKEYIX_INVALID,
1927                         antenna, flags, 0, 0);
1928         if (ret)
1929                 goto err_unmap;
1930
1931         return 0;
1932 err_unmap:
1933         pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
1934         return ret;
1935 }
1936
1937 /*
1938  * Transmit a beacon frame at SWBA.  Dynamic updates to the
1939  * frame contents are done as needed and the slot time is
1940  * also adjusted based on current state.
1941  *
1942  * this is usually called from interrupt context (ath5k_intr())
1943  * but also from ath5k_beacon_config() in IBSS mode which in turn
1944  * can be called from a tasklet and user context
1945  */
1946 static void
1947 ath5k_beacon_send(struct ath5k_softc *sc)
1948 {
1949         struct ath5k_buf *bf = sc->bbuf;
1950         struct ath5k_hw *ah = sc->ah;
1951
1952         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
1953
1954         if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
1955                         sc->opmode == NL80211_IFTYPE_MONITOR)) {
1956                 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
1957                 return;
1958         }
1959         /*
1960          * Check if the previous beacon has gone out.  If
1961          * not don't don't try to post another, skip this
1962          * period and wait for the next.  Missed beacons
1963          * indicate a problem and should not occur.  If we
1964          * miss too many consecutive beacons reset the device.
1965          */
1966         if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
1967                 sc->bmisscount++;
1968                 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1969                         "missed %u consecutive beacons\n", sc->bmisscount);
1970                 if (sc->bmisscount > 3) {               /* NB: 3 is a guess */
1971                         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1972                                 "stuck beacon time (%u missed)\n",
1973                                 sc->bmisscount);
1974                         tasklet_schedule(&sc->restq);
1975                 }
1976                 return;
1977         }
1978         if (unlikely(sc->bmisscount != 0)) {
1979                 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1980                         "resume beacon xmit after %u misses\n",
1981                         sc->bmisscount);
1982                 sc->bmisscount = 0;
1983         }
1984
1985         /*
1986          * Stop any current dma and put the new frame on the queue.
1987          * This should never fail since we check above that no frames
1988          * are still pending on the queue.
1989          */
1990         if (unlikely(ath5k_hw_stop_tx_dma(ah, sc->bhalq))) {
1991                 ATH5K_WARN(sc, "beacon queue %u didn't stop?\n", sc->bhalq);
1992                 /* NB: hw still stops DMA, so proceed */
1993         }
1994
1995         ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
1996         ath5k_hw_start_tx_dma(ah, sc->bhalq);
1997         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
1998                 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
1999
2000         sc->bsent++;
2001 }
2002
2003
2004 /**
2005  * ath5k_beacon_update_timers - update beacon timers
2006  *
2007  * @sc: struct ath5k_softc pointer we are operating on
2008  * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
2009  *          beacon timer update based on the current HW TSF.
2010  *
2011  * Calculate the next target beacon transmit time (TBTT) based on the timestamp
2012  * of a received beacon or the current local hardware TSF and write it to the
2013  * beacon timer registers.
2014  *
2015  * This is called in a variety of situations, e.g. when a beacon is received,
2016  * when a TSF update has been detected, but also when an new IBSS is created or
2017  * when we otherwise know we have to update the timers, but we keep it in this
2018  * function to have it all together in one place.
2019  */
2020 static void
2021 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
2022 {
2023         struct ath5k_hw *ah = sc->ah;
2024         u32 nexttbtt, intval, hw_tu, bc_tu;
2025         u64 hw_tsf;
2026
2027         intval = sc->bintval & AR5K_BEACON_PERIOD;
2028         if (WARN_ON(!intval))
2029                 return;
2030
2031         /* beacon TSF converted to TU */
2032         bc_tu = TSF_TO_TU(bc_tsf);
2033
2034         /* current TSF converted to TU */
2035         hw_tsf = ath5k_hw_get_tsf64(ah);
2036         hw_tu = TSF_TO_TU(hw_tsf);
2037
2038 #define FUDGE 3
2039         /* we use FUDGE to make sure the next TBTT is ahead of the current TU */
2040         if (bc_tsf == -1) {
2041                 /*
2042                  * no beacons received, called internally.
2043                  * just need to refresh timers based on HW TSF.
2044                  */
2045                 nexttbtt = roundup(hw_tu + FUDGE, intval);
2046         } else if (bc_tsf == 0) {
2047                 /*
2048                  * no beacon received, probably called by ath5k_reset_tsf().
2049                  * reset TSF to start with 0.
2050                  */
2051                 nexttbtt = intval;
2052                 intval |= AR5K_BEACON_RESET_TSF;
2053         } else if (bc_tsf > hw_tsf) {
2054                 /*
2055                  * beacon received, SW merge happend but HW TSF not yet updated.
2056                  * not possible to reconfigure timers yet, but next time we
2057                  * receive a beacon with the same BSSID, the hardware will
2058                  * automatically update the TSF and then we need to reconfigure
2059                  * the timers.
2060                  */
2061                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2062                         "need to wait for HW TSF sync\n");
2063                 return;
2064         } else {
2065                 /*
2066                  * most important case for beacon synchronization between STA.
2067                  *
2068                  * beacon received and HW TSF has been already updated by HW.
2069                  * update next TBTT based on the TSF of the beacon, but make
2070                  * sure it is ahead of our local TSF timer.
2071                  */
2072                 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
2073         }
2074 #undef FUDGE
2075
2076         sc->nexttbtt = nexttbtt;
2077
2078         intval |= AR5K_BEACON_ENA;
2079         ath5k_hw_init_beacon(ah, nexttbtt, intval);
2080
2081         /*
2082          * debugging output last in order to preserve the time critical aspect
2083          * of this function
2084          */
2085         if (bc_tsf == -1)
2086                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2087                         "reconfigured timers based on HW TSF\n");
2088         else if (bc_tsf == 0)
2089                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2090                         "reset HW TSF and timers\n");
2091         else
2092                 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2093                         "updated timers based on beacon TSF\n");
2094
2095         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2096                           "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2097                           (unsigned long long) bc_tsf,
2098                           (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
2099         ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
2100                 intval & AR5K_BEACON_PERIOD,
2101                 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
2102                 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
2103 }
2104
2105
2106 /**
2107  * ath5k_beacon_config - Configure the beacon queues and interrupts
2108  *
2109  * @sc: struct ath5k_softc pointer we are operating on
2110  *
2111  * When operating in station mode we want to receive a BMISS interrupt when we
2112  * stop seeing beacons from the AP we've associated with so we can look for
2113  * another AP to associate with.
2114  *
2115  * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2116  * interrupts to detect TSF updates only.
2117  *
2118  * AP mode is missing.
2119  */
2120 static void
2121 ath5k_beacon_config(struct ath5k_softc *sc)
2122 {
2123         struct ath5k_hw *ah = sc->ah;
2124
2125         ath5k_hw_set_imr(ah, 0);
2126         sc->bmisscount = 0;
2127         sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
2128
2129         if (sc->opmode == NL80211_IFTYPE_STATION) {
2130                 sc->imask |= AR5K_INT_BMISS;
2131         } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2132                 /*
2133                  * In IBSS mode we use a self-linked tx descriptor and let the
2134                  * hardware send the beacons automatically. We have to load it
2135                  * only once here.
2136                  * We use the SWBA interrupt only to keep track of the beacon
2137                  * timers in order to detect automatic TSF updates.
2138                  */
2139                 ath5k_beaconq_config(sc);
2140
2141                 sc->imask |= AR5K_INT_SWBA;
2142
2143                 if (ath5k_hw_hasveol(ah)) {
2144                         spin_lock(&sc->block);
2145                         ath5k_beacon_send(sc);
2146                         spin_unlock(&sc->block);
2147                 }
2148         }
2149         /* TODO else AP */
2150
2151         ath5k_hw_set_imr(ah, sc->imask);
2152 }
2153
2154
2155 /********************\
2156 * Interrupt handling *
2157 \********************/
2158
2159 static int
2160 ath5k_init(struct ath5k_softc *sc)
2161 {
2162         int ret;
2163
2164         mutex_lock(&sc->lock);
2165
2166         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2167
2168         /*
2169          * Stop anything previously setup.  This is safe
2170          * no matter this is the first time through or not.
2171          */
2172         ath5k_stop_locked(sc);
2173
2174         /*
2175          * The basic interface to setting the hardware in a good
2176          * state is ``reset''.  On return the hardware is known to
2177          * be powered up and with interrupts disabled.  This must
2178          * be followed by initialization of the appropriate bits
2179          * and then setup of the interrupt mask.
2180          */
2181         sc->curchan = sc->hw->conf.channel;
2182         sc->curband = &sc->sbands[sc->curchan->band];
2183         sc->imask = AR5K_INT_RX | AR5K_INT_TX | AR5K_INT_RXEOL |
2184                 AR5K_INT_RXORN | AR5K_INT_FATAL | AR5K_INT_GLOBAL |
2185                 AR5K_INT_MIB;
2186         ret = ath5k_reset(sc, false, false);
2187         if (ret)
2188                 goto done;
2189
2190         /* Set ack to be sent at low bit-rates */
2191         ath5k_hw_set_ack_bitrate_high(sc->ah, false);
2192
2193         mod_timer(&sc->calib_tim, round_jiffies(jiffies +
2194                         msecs_to_jiffies(ath5k_calinterval * 1000)));
2195
2196         ret = 0;
2197 done:
2198         mmiowb();
2199         mutex_unlock(&sc->lock);
2200         return ret;
2201 }
2202
2203 static int
2204 ath5k_stop_locked(struct ath5k_softc *sc)
2205 {
2206         struct ath5k_hw *ah = sc->ah;
2207
2208         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2209                         test_bit(ATH_STAT_INVALID, sc->status));
2210
2211         /*
2212          * Shutdown the hardware and driver:
2213          *    stop output from above
2214          *    disable interrupts
2215          *    turn off timers
2216          *    turn off the radio
2217          *    clear transmit machinery
2218          *    clear receive machinery
2219          *    drain and release tx queues
2220          *    reclaim beacon resources
2221          *    power down hardware
2222          *
2223          * Note that some of this work is not possible if the
2224          * hardware is gone (invalid).
2225          */
2226         ieee80211_stop_queues(sc->hw);
2227
2228         if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2229                 ath5k_led_off(sc);
2230                 ath5k_hw_set_imr(ah, 0);
2231                 synchronize_irq(sc->pdev->irq);
2232         }
2233         ath5k_txq_cleanup(sc);
2234         if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2235                 ath5k_rx_stop(sc);
2236                 ath5k_hw_phy_disable(ah);
2237         } else
2238                 sc->rxlink = NULL;
2239
2240         return 0;
2241 }
2242
2243 /*
2244  * Stop the device, grabbing the top-level lock to protect
2245  * against concurrent entry through ath5k_init (which can happen
2246  * if another thread does a system call and the thread doing the
2247  * stop is preempted).
2248  */
2249 static int
2250 ath5k_stop_hw(struct ath5k_softc *sc)
2251 {
2252         int ret;
2253
2254         mutex_lock(&sc->lock);
2255         ret = ath5k_stop_locked(sc);
2256         if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2257                 /*
2258                  * Set the chip in full sleep mode.  Note that we are
2259                  * careful to do this only when bringing the interface
2260                  * completely to a stop.  When the chip is in this state
2261                  * it must be carefully woken up or references to
2262                  * registers in the PCI clock domain may freeze the bus
2263                  * (and system).  This varies by chip and is mostly an
2264                  * issue with newer parts that go to sleep more quickly.
2265                  */
2266                 if (sc->ah->ah_mac_srev >= 0x78) {
2267                         /*
2268                          * XXX
2269                          * don't put newer MAC revisions > 7.8 to sleep because
2270                          * of the above mentioned problems
2271                          */
2272                         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mac version > 7.8, "
2273                                 "not putting device to sleep\n");
2274                 } else {
2275                         ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2276                                 "putting device to full sleep\n");
2277                         ath5k_hw_set_power(sc->ah, AR5K_PM_FULL_SLEEP, true, 0);
2278                 }
2279         }
2280         ath5k_txbuf_free(sc, sc->bbuf);
2281         mmiowb();
2282         mutex_unlock(&sc->lock);
2283
2284         del_timer_sync(&sc->calib_tim);
2285         tasklet_kill(&sc->rxtq);
2286         tasklet_kill(&sc->txtq);
2287         tasklet_kill(&sc->restq);
2288
2289         return ret;
2290 }
2291
2292 static irqreturn_t
2293 ath5k_intr(int irq, void *dev_id)
2294 {
2295         struct ath5k_softc *sc = dev_id;
2296         struct ath5k_hw *ah = sc->ah;
2297         enum ath5k_int status;
2298         unsigned int counter = 1000;
2299
2300         if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2301                                 !ath5k_hw_is_intr_pending(ah)))
2302                 return IRQ_NONE;
2303
2304         do {
2305                 /*
2306                  * Figure out the reason(s) for the interrupt.  Note
2307                  * that get_isr returns a pseudo-ISR that may include
2308                  * bits we haven't explicitly enabled so we mask the
2309                  * value to insure we only process bits we requested.
2310                  */
2311                 ath5k_hw_get_isr(ah, &status);          /* NB: clears IRQ too */
2312                 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2313                                 status, sc->imask);
2314                 status &= sc->imask; /* discard unasked for bits */
2315                 if (unlikely(status & AR5K_INT_FATAL)) {
2316                         /*
2317                          * Fatal errors are unrecoverable.
2318                          * Typically these are caused by DMA errors.
2319                          */
2320                         tasklet_schedule(&sc->restq);
2321                 } else if (unlikely(status & AR5K_INT_RXORN)) {
2322                         tasklet_schedule(&sc->restq);
2323                 } else {
2324                         if (status & AR5K_INT_SWBA) {
2325                                 /*
2326                                 * Software beacon alert--time to send a beacon.
2327                                 * Handle beacon transmission directly; deferring
2328                                 * this is too slow to meet timing constraints
2329                                 * under load.
2330                                 *
2331                                 * In IBSS mode we use this interrupt just to
2332                                 * keep track of the next TBTT (target beacon
2333                                 * transmission time) in order to detect wether
2334                                 * automatic TSF updates happened.
2335                                 */
2336                                 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2337                                          /* XXX: only if VEOL suppported */
2338                                         u64 tsf = ath5k_hw_get_tsf64(ah);
2339                                         sc->nexttbtt += sc->bintval;
2340                                         ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2341                                                   "SWBA nexttbtt: %x hw_tu: %x "
2342                                                   "TSF: %llx\n",
2343                                                   sc->nexttbtt,
2344                                                   TSF_TO_TU(tsf),
2345                                                   (unsigned long long) tsf);
2346                                 } else {
2347                                         spin_lock(&sc->block);
2348                                         ath5k_beacon_send(sc);
2349                                         spin_unlock(&sc->block);
2350                                 }
2351                         }
2352                         if (status & AR5K_INT_RXEOL) {
2353                                 /*
2354                                 * NB: the hardware should re-read the link when
2355                                 *     RXE bit is written, but it doesn't work at
2356                                 *     least on older hardware revs.
2357                                 */
2358                                 sc->rxlink = NULL;
2359                         }
2360                         if (status & AR5K_INT_TXURN) {
2361                                 /* bump tx trigger level */
2362                                 ath5k_hw_update_tx_triglevel(ah, true);
2363                         }
2364                         if (status & AR5K_INT_RX)
2365                                 tasklet_schedule(&sc->rxtq);
2366                         if (status & AR5K_INT_TX)
2367                                 tasklet_schedule(&sc->txtq);
2368                         if (status & AR5K_INT_BMISS) {
2369                         }
2370                         if (status & AR5K_INT_MIB) {
2371                                 /*
2372                                  * These stats are also used for ANI i think
2373                                  * so how about updating them more often ?
2374                                  */
2375                                 ath5k_hw_update_mib_counters(ah, &sc->ll_stats);
2376                         }
2377                 }
2378         } while (ath5k_hw_is_intr_pending(ah) && counter-- > 0);
2379
2380         if (unlikely(!counter))
2381                 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2382
2383         return IRQ_HANDLED;
2384 }
2385
2386 static void
2387 ath5k_tasklet_reset(unsigned long data)
2388 {
2389         struct ath5k_softc *sc = (void *)data;
2390
2391         ath5k_reset_wake(sc);
2392 }
2393
2394 /*
2395  * Periodically recalibrate the PHY to account
2396  * for temperature/environment changes.
2397  */
2398 static void
2399 ath5k_calibrate(unsigned long data)
2400 {
2401         struct ath5k_softc *sc = (void *)data;
2402         struct ath5k_hw *ah = sc->ah;
2403
2404         ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2405                 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2406                 sc->curchan->hw_value);
2407
2408         if (ath5k_hw_get_rf_gain(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2409                 /*
2410                  * Rfgain is out of bounds, reset the chip
2411                  * to load new gain values.
2412                  */
2413                 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2414                 ath5k_reset_wake(sc);
2415         }
2416         if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2417                 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2418                         ieee80211_frequency_to_channel(
2419                                 sc->curchan->center_freq));
2420
2421         mod_timer(&sc->calib_tim, round_jiffies(jiffies +
2422                         msecs_to_jiffies(ath5k_calinterval * 1000)));
2423 }
2424
2425
2426
2427 /***************\
2428 * LED functions *
2429 \***************/
2430
2431 static void
2432 ath5k_led_enable(struct ath5k_softc *sc)
2433 {
2434         if (test_bit(ATH_STAT_LEDSOFT, sc->status)) {
2435                 ath5k_hw_set_gpio_output(sc->ah, sc->led_pin);
2436                 ath5k_led_off(sc);
2437         }
2438 }
2439
2440 static void
2441 ath5k_led_on(struct ath5k_softc *sc)
2442 {
2443         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
2444                 return;
2445         ath5k_hw_set_gpio(sc->ah, sc->led_pin, sc->led_on);
2446 }
2447
2448 static void
2449 ath5k_led_off(struct ath5k_softc *sc)
2450 {
2451         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
2452                 return;
2453         ath5k_hw_set_gpio(sc->ah, sc->led_pin, !sc->led_on);
2454 }
2455
2456 static void
2457 ath5k_led_brightness_set(struct led_classdev *led_dev,
2458         enum led_brightness brightness)
2459 {
2460         struct ath5k_led *led = container_of(led_dev, struct ath5k_led,
2461                 led_dev);
2462
2463         if (brightness == LED_OFF)
2464                 ath5k_led_off(led->sc);
2465         else
2466                 ath5k_led_on(led->sc);
2467 }
2468
2469 static int
2470 ath5k_register_led(struct ath5k_softc *sc, struct ath5k_led *led,
2471                    const char *name, char *trigger)
2472 {
2473         int err;
2474
2475         led->sc = sc;
2476         strncpy(led->name, name, sizeof(led->name));
2477         led->led_dev.name = led->name;
2478         led->led_dev.default_trigger = trigger;
2479         led->led_dev.brightness_set = ath5k_led_brightness_set;
2480
2481         err = led_classdev_register(&sc->pdev->dev, &led->led_dev);
2482         if (err)
2483         {
2484                 ATH5K_WARN(sc, "could not register LED %s\n", name);
2485                 led->sc = NULL;
2486         }
2487         return err;
2488 }
2489
2490 static void
2491 ath5k_unregister_led(struct ath5k_led *led)
2492 {
2493         if (!led->sc)
2494                 return;
2495         led_classdev_unregister(&led->led_dev);
2496         ath5k_led_off(led->sc);
2497         led->sc = NULL;
2498 }
2499
2500 static void
2501 ath5k_unregister_leds(struct ath5k_softc *sc)
2502 {
2503         ath5k_unregister_led(&sc->rx_led);
2504         ath5k_unregister_led(&sc->tx_led);
2505 }
2506
2507
2508 static int
2509 ath5k_init_leds(struct ath5k_softc *sc)
2510 {
2511         int ret = 0;
2512         struct ieee80211_hw *hw = sc->hw;
2513         struct pci_dev *pdev = sc->pdev;
2514         char name[ATH5K_LED_MAX_NAME_LEN + 1];
2515
2516         /*
2517          * Auto-enable soft led processing for IBM cards and for
2518          * 5211 minipci cards.
2519          */
2520         if (pdev->device == PCI_DEVICE_ID_ATHEROS_AR5212_IBM ||
2521             pdev->device == PCI_DEVICE_ID_ATHEROS_AR5211) {
2522                 __set_bit(ATH_STAT_LEDSOFT, sc->status);
2523                 sc->led_pin = 0;
2524                 sc->led_on = 0;  /* active low */
2525         }
2526         /* Enable softled on PIN1 on HP Compaq nc6xx, nc4000 & nx5000 laptops */
2527         if (pdev->subsystem_vendor == PCI_VENDOR_ID_COMPAQ) {
2528                 __set_bit(ATH_STAT_LEDSOFT, sc->status);
2529                 sc->led_pin = 1;
2530                 sc->led_on = 1;  /* active high */
2531         }
2532         if (!test_bit(ATH_STAT_LEDSOFT, sc->status))
2533                 goto out;
2534
2535         ath5k_led_enable(sc);
2536
2537         snprintf(name, sizeof(name), "ath5k-%s::rx", wiphy_name(hw->wiphy));
2538         ret = ath5k_register_led(sc, &sc->rx_led, name,
2539                 ieee80211_get_rx_led_name(hw));
2540         if (ret)
2541                 goto out;
2542
2543         snprintf(name, sizeof(name), "ath5k-%s::tx", wiphy_name(hw->wiphy));
2544         ret = ath5k_register_led(sc, &sc->tx_led, name,
2545                 ieee80211_get_tx_led_name(hw));
2546 out:
2547         return ret;
2548 }
2549
2550
2551 /********************\
2552 * Mac80211 functions *
2553 \********************/
2554
2555 static int
2556 ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2557 {
2558         struct ath5k_softc *sc = hw->priv;
2559         struct ath5k_buf *bf;
2560         unsigned long flags;
2561         int hdrlen;
2562         int pad;
2563
2564         ath5k_debug_dump_skb(sc, skb, "TX  ", 1);
2565
2566         if (sc->opmode == NL80211_IFTYPE_MONITOR)
2567                 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, "tx in monitor (scan?)\n");
2568
2569         /*
2570          * the hardware expects the header padded to 4 byte boundaries
2571          * if this is not the case we add the padding after the header
2572          */
2573         hdrlen = ieee80211_get_hdrlen_from_skb(skb);
2574         if (hdrlen & 3) {
2575                 pad = hdrlen % 4;
2576                 if (skb_headroom(skb) < pad) {
2577                         ATH5K_ERR(sc, "tx hdrlen not %%4: %d not enough"
2578                                 " headroom to pad %d\n", hdrlen, pad);
2579                         return -1;
2580                 }
2581                 skb_push(skb, pad);
2582                 memmove(skb->data, skb->data+pad, hdrlen);
2583         }
2584
2585         spin_lock_irqsave(&sc->txbuflock, flags);
2586         if (list_empty(&sc->txbuf)) {
2587                 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
2588                 spin_unlock_irqrestore(&sc->txbuflock, flags);
2589                 ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
2590                 return -1;
2591         }
2592         bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
2593         list_del(&bf->list);
2594         sc->txbuf_len--;
2595         if (list_empty(&sc->txbuf))
2596                 ieee80211_stop_queues(hw);
2597         spin_unlock_irqrestore(&sc->txbuflock, flags);
2598
2599         bf->skb = skb;
2600
2601         if (ath5k_txbuf_setup(sc, bf)) {
2602                 bf->skb = NULL;
2603                 spin_lock_irqsave(&sc->txbuflock, flags);
2604                 list_add_tail(&bf->list, &sc->txbuf);
2605                 sc->txbuf_len++;
2606                 spin_unlock_irqrestore(&sc->txbuflock, flags);
2607                 dev_kfree_skb_any(skb);
2608                 return 0;
2609         }
2610
2611         return 0;
2612 }
2613
2614 static int
2615 ath5k_reset(struct ath5k_softc *sc, bool stop, bool change_channel)
2616 {
2617         struct ath5k_hw *ah = sc->ah;
2618         int ret;
2619
2620         ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2621
2622         if (stop) {
2623                 ath5k_hw_set_imr(ah, 0);
2624                 ath5k_txq_cleanup(sc);
2625                 ath5k_rx_stop(sc);
2626         }
2627         ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, true);
2628         if (ret) {
2629                 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2630                 goto err;
2631         }
2632
2633         /*
2634          * This is needed only to setup initial state
2635          * but it's best done after a reset.
2636          */
2637         ath5k_hw_set_txpower_limit(sc->ah, 0);
2638
2639         ret = ath5k_rx_start(sc);
2640         if (ret) {
2641                 ATH5K_ERR(sc, "can't start recv logic\n");
2642                 goto err;
2643         }
2644
2645         /*
2646          * Change channels and update the h/w rate map if we're switching;
2647          * e.g. 11a to 11b/g.
2648          *
2649          * We may be doing a reset in response to an ioctl that changes the
2650          * channel so update any state that might change as a result.
2651          *
2652          * XXX needed?
2653          */
2654 /*      ath5k_chan_change(sc, c); */
2655
2656         ath5k_beacon_config(sc);
2657         /* intrs are enabled by ath5k_beacon_config */
2658
2659         return 0;
2660 err:
2661         return ret;
2662 }
2663
2664 static int
2665 ath5k_reset_wake(struct ath5k_softc *sc)
2666 {
2667         int ret;
2668
2669         ret = ath5k_reset(sc, true, true);
2670         if (!ret)
2671                 ieee80211_wake_queues(sc->hw);
2672
2673         return ret;
2674 }
2675
2676 static int ath5k_start(struct ieee80211_hw *hw)
2677 {
2678         return ath5k_init(hw->priv);
2679 }
2680
2681 static void ath5k_stop(struct ieee80211_hw *hw)
2682 {
2683         ath5k_stop_hw(hw->priv);
2684 }
2685
2686 static int ath5k_add_interface(struct ieee80211_hw *hw,
2687                 struct ieee80211_if_init_conf *conf)
2688 {
2689         struct ath5k_softc *sc = hw->priv;
2690         int ret;
2691
2692         mutex_lock(&sc->lock);
2693         if (sc->vif) {
2694                 ret = 0;
2695                 goto end;
2696         }
2697
2698         sc->vif = conf->vif;
2699
2700         switch (conf->type) {
2701         case NL80211_IFTYPE_STATION:
2702         case NL80211_IFTYPE_ADHOC:
2703         case NL80211_IFTYPE_MONITOR:
2704                 sc->opmode = conf->type;
2705                 break;
2706         default:
2707                 ret = -EOPNOTSUPP;
2708                 goto end;
2709         }
2710
2711         /* Set to a reasonable value. Note that this will
2712          * be set to mac80211's value at ath5k_config(). */
2713         sc->bintval = 1000;
2714
2715         ret = 0;
2716 end:
2717         mutex_unlock(&sc->lock);
2718         return ret;
2719 }
2720
2721 static void
2722 ath5k_remove_interface(struct ieee80211_hw *hw,
2723                         struct ieee80211_if_init_conf *conf)
2724 {
2725         struct ath5k_softc *sc = hw->priv;
2726
2727         mutex_lock(&sc->lock);
2728         if (sc->vif != conf->vif)
2729                 goto end;
2730
2731         sc->vif = NULL;
2732 end:
2733         mutex_unlock(&sc->lock);
2734 }
2735
2736 /*
2737  * TODO: Phy disable/diversity etc
2738  */
2739 static int
2740 ath5k_config(struct ieee80211_hw *hw,
2741                         struct ieee80211_conf *conf)
2742 {
2743         struct ath5k_softc *sc = hw->priv;
2744
2745         sc->bintval = conf->beacon_int;
2746         sc->power_level = conf->power_level;
2747
2748         return ath5k_chan_set(sc, conf->channel);
2749 }
2750
2751 static int
2752 ath5k_config_interface(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
2753                         struct ieee80211_if_conf *conf)
2754 {
2755         struct ath5k_softc *sc = hw->priv;
2756         struct ath5k_hw *ah = sc->ah;
2757         int ret;
2758
2759         mutex_lock(&sc->lock);
2760         if (sc->vif != vif) {
2761                 ret = -EIO;
2762                 goto unlock;
2763         }
2764         if (conf->bssid) {
2765                 /* Cache for later use during resets */
2766                 memcpy(ah->ah_bssid, conf->bssid, ETH_ALEN);
2767                 /* XXX: assoc id is set to 0 for now, mac80211 doesn't have
2768                  * a clean way of letting us retrieve this yet. */
2769                 ath5k_hw_set_associd(ah, ah->ah_bssid, 0);
2770                 mmiowb();
2771         }
2772
2773         if (conf->changed & IEEE80211_IFCC_BEACON &&
2774             vif->type == NL80211_IFTYPE_ADHOC) {
2775                 struct sk_buff *beacon = ieee80211_beacon_get(hw, vif);
2776                 if (!beacon) {
2777                         ret = -ENOMEM;
2778                         goto unlock;
2779                 }
2780                 /* call old handler for now */
2781                 ath5k_beacon_update(hw, beacon);
2782         }
2783
2784         mutex_unlock(&sc->lock);
2785
2786         return ath5k_reset_wake(sc);
2787 unlock:
2788         mutex_unlock(&sc->lock);
2789         return ret;
2790 }
2791
2792 #define SUPPORTED_FIF_FLAGS \
2793         FIF_PROMISC_IN_BSS |  FIF_ALLMULTI | FIF_FCSFAIL | \
2794         FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
2795         FIF_BCN_PRBRESP_PROMISC
2796 /*
2797  * o always accept unicast, broadcast, and multicast traffic
2798  * o multicast traffic for all BSSIDs will be enabled if mac80211
2799  *   says it should be
2800  * o maintain current state of phy ofdm or phy cck error reception.
2801  *   If the hardware detects any of these type of errors then
2802  *   ath5k_hw_get_rx_filter() will pass to us the respective
2803  *   hardware filters to be able to receive these type of frames.
2804  * o probe request frames are accepted only when operating in
2805  *   hostap, adhoc, or monitor modes
2806  * o enable promiscuous mode according to the interface state
2807  * o accept beacons:
2808  *   - when operating in adhoc mode so the 802.11 layer creates
2809  *     node table entries for peers,
2810  *   - when operating in station mode for collecting rssi data when
2811  *     the station is otherwise quiet, or
2812  *   - when scanning
2813  */
2814 static void ath5k_configure_filter(struct ieee80211_hw *hw,
2815                 unsigned int changed_flags,
2816                 unsigned int *new_flags,
2817                 int mc_count, struct dev_mc_list *mclist)
2818 {
2819         struct ath5k_softc *sc = hw->priv;
2820         struct ath5k_hw *ah = sc->ah;
2821         u32 mfilt[2], val, rfilt;
2822         u8 pos;
2823         int i;
2824
2825         mfilt[0] = 0;
2826         mfilt[1] = 0;
2827
2828         /* Only deal with supported flags */
2829         changed_flags &= SUPPORTED_FIF_FLAGS;
2830         *new_flags &= SUPPORTED_FIF_FLAGS;
2831
2832         /* If HW detects any phy or radar errors, leave those filters on.
2833          * Also, always enable Unicast, Broadcasts and Multicast
2834          * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
2835         rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
2836                 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
2837                 AR5K_RX_FILTER_MCAST);
2838
2839         if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
2840                 if (*new_flags & FIF_PROMISC_IN_BSS) {
2841                         rfilt |= AR5K_RX_FILTER_PROM;
2842                         __set_bit(ATH_STAT_PROMISC, sc->status);
2843                 }
2844                 else
2845                         __clear_bit(ATH_STAT_PROMISC, sc->status);
2846         }
2847
2848         /* Note, AR5K_RX_FILTER_MCAST is already enabled */
2849         if (*new_flags & FIF_ALLMULTI) {
2850                 mfilt[0] =  ~0;
2851                 mfilt[1] =  ~0;
2852         } else {
2853                 for (i = 0; i < mc_count; i++) {
2854                         if (!mclist)
2855                                 break;
2856                         /* calculate XOR of eight 6-bit values */
2857                         val = get_unaligned_le32(mclist->dmi_addr + 0);
2858                         pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2859                         val = get_unaligned_le32(mclist->dmi_addr + 3);
2860                         pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2861                         pos &= 0x3f;
2862                         mfilt[pos / 32] |= (1 << (pos % 32));
2863                         /* XXX: we might be able to just do this instead,
2864                         * but not sure, needs testing, if we do use this we'd
2865                         * neet to inform below to not reset the mcast */
2866                         /* ath5k_hw_set_mcast_filterindex(ah,
2867                          *      mclist->dmi_addr[5]); */
2868                         mclist = mclist->next;
2869                 }
2870         }
2871
2872         /* This is the best we can do */
2873         if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
2874                 rfilt |= AR5K_RX_FILTER_PHYERR;
2875
2876         /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
2877         * and probes for any BSSID, this needs testing */
2878         if (*new_flags & FIF_BCN_PRBRESP_PROMISC)
2879                 rfilt |= AR5K_RX_FILTER_BEACON | AR5K_RX_FILTER_PROBEREQ;
2880
2881         /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
2882          * set we should only pass on control frames for this
2883          * station. This needs testing. I believe right now this
2884          * enables *all* control frames, which is OK.. but
2885          * but we should see if we can improve on granularity */
2886         if (*new_flags & FIF_CONTROL)
2887                 rfilt |= AR5K_RX_FILTER_CONTROL;
2888
2889         /* Additional settings per mode -- this is per ath5k */
2890
2891         /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
2892
2893         if (sc->opmode == NL80211_IFTYPE_MONITOR)
2894                 rfilt |= AR5K_RX_FILTER_CONTROL | AR5K_RX_FILTER_BEACON |
2895                         AR5K_RX_FILTER_PROBEREQ | AR5K_RX_FILTER_PROM;
2896         if (sc->opmode != NL80211_IFTYPE_STATION)
2897                 rfilt |= AR5K_RX_FILTER_PROBEREQ;
2898         if (sc->opmode != NL80211_IFTYPE_AP &&
2899                 sc->opmode != NL80211_IFTYPE_MESH_POINT &&
2900                 test_bit(ATH_STAT_PROMISC, sc->status))
2901                 rfilt |= AR5K_RX_FILTER_PROM;
2902         if (sc->opmode == NL80211_IFTYPE_STATION ||
2903                 sc->opmode == NL80211_IFTYPE_ADHOC) {
2904                 rfilt |= AR5K_RX_FILTER_BEACON;
2905         }
2906
2907         /* Set filters */
2908         ath5k_hw_set_rx_filter(ah,rfilt);
2909
2910         /* Set multicast bits */
2911         ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
2912         /* Set the cached hw filter flags, this will alter actually
2913          * be set in HW */
2914         sc->filter_flags = rfilt;
2915 }
2916
2917 static int
2918 ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2919                 const u8 *local_addr, const u8 *addr,
2920                 struct ieee80211_key_conf *key)
2921 {
2922         struct ath5k_softc *sc = hw->priv;
2923         int ret = 0;
2924
2925         switch(key->alg) {
2926         case ALG_WEP:
2927         /* XXX: fix hardware encryption, its not working. For now
2928          * allow software encryption */
2929                 /* break; */
2930         case ALG_TKIP:
2931         case ALG_CCMP:
2932                 return -EOPNOTSUPP;
2933         default:
2934                 WARN_ON(1);
2935                 return -EINVAL;
2936         }
2937
2938         mutex_lock(&sc->lock);
2939
2940         switch (cmd) {
2941         case SET_KEY:
2942                 ret = ath5k_hw_set_key(sc->ah, key->keyidx, key, addr);
2943                 if (ret) {
2944                         ATH5K_ERR(sc, "can't set the key\n");
2945                         goto unlock;
2946                 }
2947                 __set_bit(key->keyidx, sc->keymap);
2948                 key->hw_key_idx = key->keyidx;
2949                 break;
2950         case DISABLE_KEY:
2951                 ath5k_hw_reset_key(sc->ah, key->keyidx);
2952                 __clear_bit(key->keyidx, sc->keymap);
2953                 break;
2954         default:
2955                 ret = -EINVAL;
2956                 goto unlock;
2957         }
2958
2959 unlock:
2960         mmiowb();
2961         mutex_unlock(&sc->lock);
2962         return ret;
2963 }
2964
2965 static int
2966 ath5k_get_stats(struct ieee80211_hw *hw,
2967                 struct ieee80211_low_level_stats *stats)
2968 {
2969         struct ath5k_softc *sc = hw->priv;
2970         struct ath5k_hw *ah = sc->ah;
2971
2972         /* Force update */
2973         ath5k_hw_update_mib_counters(ah, &sc->ll_stats);
2974
2975         memcpy(stats, &sc->ll_stats, sizeof(sc->ll_stats));
2976
2977         return 0;
2978 }
2979
2980 static int
2981 ath5k_get_tx_stats(struct ieee80211_hw *hw,
2982                 struct ieee80211_tx_queue_stats *stats)
2983 {
2984         struct ath5k_softc *sc = hw->priv;
2985
2986         memcpy(stats, &sc->tx_stats, sizeof(sc->tx_stats));
2987
2988         return 0;
2989 }
2990
2991 static u64
2992 ath5k_get_tsf(struct ieee80211_hw *hw)
2993 {
2994         struct ath5k_softc *sc = hw->priv;
2995
2996         return ath5k_hw_get_tsf64(sc->ah);
2997 }
2998
2999 static void
3000 ath5k_reset_tsf(struct ieee80211_hw *hw)
3001 {
3002         struct ath5k_softc *sc = hw->priv;
3003
3004         /*
3005          * in IBSS mode we need to update the beacon timers too.
3006          * this will also reset the TSF if we call it with 0
3007          */
3008         if (sc->opmode == NL80211_IFTYPE_ADHOC)
3009                 ath5k_beacon_update_timers(sc, 0);
3010         else
3011                 ath5k_hw_reset_tsf(sc->ah);
3012 }
3013
3014 static int
3015 ath5k_beacon_update(struct ieee80211_hw *hw, struct sk_buff *skb)
3016 {
3017         struct ath5k_softc *sc = hw->priv;
3018         unsigned long flags;
3019         int ret;
3020
3021         ath5k_debug_dump_skb(sc, skb, "BC  ", 1);
3022
3023         if (sc->opmode != NL80211_IFTYPE_ADHOC) {
3024                 ret = -EIO;
3025                 goto end;
3026         }
3027
3028         spin_lock_irqsave(&sc->block, flags);
3029         ath5k_txbuf_free(sc, sc->bbuf);
3030         sc->bbuf->skb = skb;
3031         ret = ath5k_beacon_setup(sc, sc->bbuf);
3032         if (ret)
3033                 sc->bbuf->skb = NULL;
3034         spin_unlock_irqrestore(&sc->block, flags);
3035         if (!ret) {
3036                 ath5k_beacon_config(sc);
3037                 mmiowb();
3038         }
3039
3040 end:
3041         return ret;
3042 }
3043