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>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
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.
43 #include <linux/module.h>
44 #include <linux/delay.h>
45 #include <linux/hardirq.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>
54 #include <net/ieee80211_radiotap.h>
56 #include <asm/unaligned.h>
62 static u8 ath5k_calinterval = 10; /* Calibrate PHY every 10 secs (TODO: Fixme) */
63 static int modparam_nohwcrypt;
64 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
65 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
67 static int modparam_all_channels;
68 module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO);
69 MODULE_PARM_DESC(all_channels, "Expose all channels the device can use.");
77 MODULE_AUTHOR("Jiri Slaby");
78 MODULE_AUTHOR("Nick Kossifidis");
79 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
80 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
81 MODULE_LICENSE("Dual BSD/GPL");
82 MODULE_VERSION("0.6.0 (EXPERIMENTAL)");
86 static const struct pci_device_id ath5k_pci_id_table[] = {
87 { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
88 { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
89 { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
90 { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
91 { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
92 { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
93 { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
94 { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
95 { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 combatible */
96 { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 combatible */
97 { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 combatible */
98 { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 combatible */
99 { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 combatible */
100 { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 combatible */
101 { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
102 { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
103 { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
104 { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
107 MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
110 static const struct ath5k_srev_name srev_names[] = {
111 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
112 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
113 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
114 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B },
115 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 },
116 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 },
117 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 },
118 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A },
119 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 },
120 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 },
121 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 },
122 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 },
123 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 },
124 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 },
125 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 },
126 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
127 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
128 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
129 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
130 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
131 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
132 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A },
133 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 },
134 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 },
135 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A },
136 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B },
137 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 },
138 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A },
139 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
140 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
141 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
142 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
143 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
144 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
145 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
146 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
149 static const struct ieee80211_rate ath5k_rates[] = {
151 .hw_value = ATH5K_RATE_CODE_1M, },
153 .hw_value = ATH5K_RATE_CODE_2M,
154 .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
155 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
157 .hw_value = ATH5K_RATE_CODE_5_5M,
158 .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
159 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
161 .hw_value = ATH5K_RATE_CODE_11M,
162 .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
163 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
165 .hw_value = ATH5K_RATE_CODE_6M,
168 .hw_value = ATH5K_RATE_CODE_9M,
171 .hw_value = ATH5K_RATE_CODE_12M,
174 .hw_value = ATH5K_RATE_CODE_18M,
177 .hw_value = ATH5K_RATE_CODE_24M,
180 .hw_value = ATH5K_RATE_CODE_36M,
183 .hw_value = ATH5K_RATE_CODE_48M,
186 .hw_value = ATH5K_RATE_CODE_54M,
192 * Prototypes - PCI stack related functions
194 static int __devinit ath5k_pci_probe(struct pci_dev *pdev,
195 const struct pci_device_id *id);
196 static void __devexit ath5k_pci_remove(struct pci_dev *pdev);
198 static int ath5k_pci_suspend(struct pci_dev *pdev,
200 static int ath5k_pci_resume(struct pci_dev *pdev);
202 #define ath5k_pci_suspend NULL
203 #define ath5k_pci_resume NULL
204 #endif /* CONFIG_PM */
206 static struct pci_driver ath5k_pci_driver = {
207 .name = KBUILD_MODNAME,
208 .id_table = ath5k_pci_id_table,
209 .probe = ath5k_pci_probe,
210 .remove = __devexit_p(ath5k_pci_remove),
211 .suspend = ath5k_pci_suspend,
212 .resume = ath5k_pci_resume,
218 * Prototypes - MAC 802.11 stack related functions
220 static int ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb);
221 static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
222 struct ath5k_txq *txq);
223 static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan);
224 static int ath5k_reset_wake(struct ath5k_softc *sc);
225 static int ath5k_start(struct ieee80211_hw *hw);
226 static void ath5k_stop(struct ieee80211_hw *hw);
227 static int ath5k_add_interface(struct ieee80211_hw *hw,
228 struct ieee80211_if_init_conf *conf);
229 static void ath5k_remove_interface(struct ieee80211_hw *hw,
230 struct ieee80211_if_init_conf *conf);
231 static int ath5k_config(struct ieee80211_hw *hw, u32 changed);
232 static u64 ath5k_prepare_multicast(struct ieee80211_hw *hw,
233 int mc_count, struct dev_addr_list *mc_list);
234 static void ath5k_configure_filter(struct ieee80211_hw *hw,
235 unsigned int changed_flags,
236 unsigned int *new_flags,
238 static int ath5k_set_key(struct ieee80211_hw *hw,
239 enum set_key_cmd cmd,
240 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
241 struct ieee80211_key_conf *key);
242 static int ath5k_get_stats(struct ieee80211_hw *hw,
243 struct ieee80211_low_level_stats *stats);
244 static int ath5k_get_tx_stats(struct ieee80211_hw *hw,
245 struct ieee80211_tx_queue_stats *stats);
246 static u64 ath5k_get_tsf(struct ieee80211_hw *hw);
247 static void ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf);
248 static void ath5k_reset_tsf(struct ieee80211_hw *hw);
249 static int ath5k_beacon_update(struct ieee80211_hw *hw,
250 struct ieee80211_vif *vif);
251 static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
252 struct ieee80211_vif *vif,
253 struct ieee80211_bss_conf *bss_conf,
255 static void ath5k_sw_scan_start(struct ieee80211_hw *hw);
256 static void ath5k_sw_scan_complete(struct ieee80211_hw *hw);
258 static const struct ieee80211_ops ath5k_hw_ops = {
260 .start = ath5k_start,
262 .add_interface = ath5k_add_interface,
263 .remove_interface = ath5k_remove_interface,
264 .config = ath5k_config,
265 .prepare_multicast = ath5k_prepare_multicast,
266 .configure_filter = ath5k_configure_filter,
267 .set_key = ath5k_set_key,
268 .get_stats = ath5k_get_stats,
270 .get_tx_stats = ath5k_get_tx_stats,
271 .get_tsf = ath5k_get_tsf,
272 .set_tsf = ath5k_set_tsf,
273 .reset_tsf = ath5k_reset_tsf,
274 .bss_info_changed = ath5k_bss_info_changed,
275 .sw_scan_start = ath5k_sw_scan_start,
276 .sw_scan_complete = ath5k_sw_scan_complete,
280 * Prototypes - Internal functions
283 static int ath5k_attach(struct pci_dev *pdev,
284 struct ieee80211_hw *hw);
285 static void ath5k_detach(struct pci_dev *pdev,
286 struct ieee80211_hw *hw);
287 /* Channel/mode setup */
288 static inline short ath5k_ieee2mhz(short chan);
289 static unsigned int ath5k_copy_channels(struct ath5k_hw *ah,
290 struct ieee80211_channel *channels,
293 static int ath5k_setup_bands(struct ieee80211_hw *hw);
294 static int ath5k_chan_set(struct ath5k_softc *sc,
295 struct ieee80211_channel *chan);
296 static void ath5k_setcurmode(struct ath5k_softc *sc,
298 static void ath5k_mode_setup(struct ath5k_softc *sc);
300 /* Descriptor setup */
301 static int ath5k_desc_alloc(struct ath5k_softc *sc,
302 struct pci_dev *pdev);
303 static void ath5k_desc_free(struct ath5k_softc *sc,
304 struct pci_dev *pdev);
306 static int ath5k_rxbuf_setup(struct ath5k_softc *sc,
307 struct ath5k_buf *bf);
308 static int ath5k_txbuf_setup(struct ath5k_softc *sc,
309 struct ath5k_buf *bf,
310 struct ath5k_txq *txq);
311 static inline void ath5k_txbuf_free(struct ath5k_softc *sc,
312 struct ath5k_buf *bf)
317 pci_unmap_single(sc->pdev, bf->skbaddr, bf->skb->len,
319 dev_kfree_skb_any(bf->skb);
323 static inline void ath5k_rxbuf_free(struct ath5k_softc *sc,
324 struct ath5k_buf *bf)
329 pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
331 dev_kfree_skb_any(bf->skb);
337 static struct ath5k_txq *ath5k_txq_setup(struct ath5k_softc *sc,
338 int qtype, int subtype);
339 static int ath5k_beaconq_setup(struct ath5k_hw *ah);
340 static int ath5k_beaconq_config(struct ath5k_softc *sc);
341 static void ath5k_txq_drainq(struct ath5k_softc *sc,
342 struct ath5k_txq *txq);
343 static void ath5k_txq_cleanup(struct ath5k_softc *sc);
344 static void ath5k_txq_release(struct ath5k_softc *sc);
346 static int ath5k_rx_start(struct ath5k_softc *sc);
347 static void ath5k_rx_stop(struct ath5k_softc *sc);
348 static unsigned int ath5k_rx_decrypted(struct ath5k_softc *sc,
349 struct ath5k_desc *ds,
351 struct ath5k_rx_status *rs);
352 static void ath5k_tasklet_rx(unsigned long data);
354 static void ath5k_tx_processq(struct ath5k_softc *sc,
355 struct ath5k_txq *txq);
356 static void ath5k_tasklet_tx(unsigned long data);
357 /* Beacon handling */
358 static int ath5k_beacon_setup(struct ath5k_softc *sc,
359 struct ath5k_buf *bf);
360 static void ath5k_beacon_send(struct ath5k_softc *sc);
361 static void ath5k_beacon_config(struct ath5k_softc *sc);
362 static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
363 static void ath5k_tasklet_beacon(unsigned long data);
365 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
367 u64 tsf = ath5k_hw_get_tsf64(ah);
369 if ((tsf & 0x7fff) < rstamp)
372 return (tsf & ~0x7fff) | rstamp;
375 /* Interrupt handling */
376 static int ath5k_init(struct ath5k_softc *sc);
377 static int ath5k_stop_locked(struct ath5k_softc *sc);
378 static int ath5k_stop_hw(struct ath5k_softc *sc);
379 static irqreturn_t ath5k_intr(int irq, void *dev_id);
380 static void ath5k_tasklet_reset(unsigned long data);
382 static void ath5k_tasklet_calibrate(unsigned long data);
385 * Module init/exit functions
394 ret = pci_register_driver(&ath5k_pci_driver);
396 printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
406 pci_unregister_driver(&ath5k_pci_driver);
408 ath5k_debug_finish();
411 module_init(init_ath5k_pci);
412 module_exit(exit_ath5k_pci);
415 /********************\
416 * PCI Initialization *
417 \********************/
420 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
422 const char *name = "xxxxx";
425 for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
426 if (srev_names[i].sr_type != type)
429 if ((val & 0xf0) == srev_names[i].sr_val)
430 name = srev_names[i].sr_name;
432 if ((val & 0xff) == srev_names[i].sr_val) {
433 name = srev_names[i].sr_name;
440 static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset)
442 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
443 return ath5k_hw_reg_read(ah, reg_offset);
446 static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
448 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
449 ath5k_hw_reg_write(ah, val, reg_offset);
452 static const struct ath_ops ath5k_common_ops = {
453 .read = ath5k_ioread32,
454 .write = ath5k_iowrite32,
458 ath5k_pci_probe(struct pci_dev *pdev,
459 const struct pci_device_id *id)
462 struct ath5k_softc *sc;
463 struct ath_common *common;
464 struct ieee80211_hw *hw;
468 ret = pci_enable_device(pdev);
470 dev_err(&pdev->dev, "can't enable device\n");
474 /* XXX 32-bit addressing only */
475 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
477 dev_err(&pdev->dev, "32-bit DMA not available\n");
482 * Cache line size is used to size and align various
483 * structures used to communicate with the hardware.
485 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
488 * Linux 2.4.18 (at least) writes the cache line size
489 * register as a 16-bit wide register which is wrong.
490 * We must have this setup properly for rx buffer
491 * DMA to work so force a reasonable value here if it
494 csz = L1_CACHE_BYTES >> 2;
495 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
498 * The default setting of latency timer yields poor results,
499 * set it to the value used by other systems. It may be worth
500 * tweaking this setting more.
502 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
504 /* Enable bus mastering */
505 pci_set_master(pdev);
508 * Disable the RETRY_TIMEOUT register (0x41) to keep
509 * PCI Tx retries from interfering with C3 CPU state.
511 pci_write_config_byte(pdev, 0x41, 0);
513 ret = pci_request_region(pdev, 0, "ath5k");
515 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
519 mem = pci_iomap(pdev, 0, 0);
521 dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
527 * Allocate hw (mac80211 main struct)
528 * and hw->priv (driver private data)
530 hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
532 dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
537 dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
539 /* Initialize driver private data */
540 SET_IEEE80211_DEV(hw, &pdev->dev);
541 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
542 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
543 IEEE80211_HW_SIGNAL_DBM |
544 IEEE80211_HW_NOISE_DBM;
546 hw->wiphy->interface_modes =
547 BIT(NL80211_IFTYPE_AP) |
548 BIT(NL80211_IFTYPE_STATION) |
549 BIT(NL80211_IFTYPE_ADHOC) |
550 BIT(NL80211_IFTYPE_MESH_POINT);
552 hw->extra_tx_headroom = 2;
553 hw->channel_change_time = 5000;
558 ath5k_debug_init_device(sc);
561 * Mark the device as detached to avoid processing
562 * interrupts until setup is complete.
564 __set_bit(ATH_STAT_INVALID, sc->status);
566 sc->iobase = mem; /* So we can unmap it on detach */
567 sc->opmode = NL80211_IFTYPE_STATION;
569 mutex_init(&sc->lock);
570 spin_lock_init(&sc->rxbuflock);
571 spin_lock_init(&sc->txbuflock);
572 spin_lock_init(&sc->block);
574 /* Set private data */
575 pci_set_drvdata(pdev, hw);
577 /* Setup interrupt handler */
578 ret = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
580 ATH5K_ERR(sc, "request_irq failed\n");
584 /*If we passed the test malloc a ath5k_hw struct*/
585 sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
588 ATH5K_ERR(sc, "out of memory\n");
593 sc->ah->ah_iobase = sc->iobase;
594 common = ath5k_hw_common(sc->ah);
595 common->ops = &ath5k_common_ops;
598 common->cachelsz = csz << 2; /* convert to bytes */
600 /* Initialize device */
601 ret = ath5k_hw_attach(sc);
606 /* set up multi-rate retry capabilities */
607 if (sc->ah->ah_version == AR5K_AR5212) {
609 hw->max_rate_tries = 11;
612 /* Finish private driver data initialization */
613 ret = ath5k_attach(pdev, hw);
617 ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
618 ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
620 sc->ah->ah_phy_revision);
622 if (!sc->ah->ah_single_chip) {
623 /* Single chip radio (!RF5111) */
624 if (sc->ah->ah_radio_5ghz_revision &&
625 !sc->ah->ah_radio_2ghz_revision) {
626 /* No 5GHz support -> report 2GHz radio */
627 if (!test_bit(AR5K_MODE_11A,
628 sc->ah->ah_capabilities.cap_mode)) {
629 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
630 ath5k_chip_name(AR5K_VERSION_RAD,
631 sc->ah->ah_radio_5ghz_revision),
632 sc->ah->ah_radio_5ghz_revision);
633 /* No 2GHz support (5110 and some
634 * 5Ghz only cards) -> report 5Ghz radio */
635 } else if (!test_bit(AR5K_MODE_11B,
636 sc->ah->ah_capabilities.cap_mode)) {
637 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
638 ath5k_chip_name(AR5K_VERSION_RAD,
639 sc->ah->ah_radio_5ghz_revision),
640 sc->ah->ah_radio_5ghz_revision);
641 /* Multiband radio */
643 ATH5K_INFO(sc, "RF%s multiband radio found"
645 ath5k_chip_name(AR5K_VERSION_RAD,
646 sc->ah->ah_radio_5ghz_revision),
647 sc->ah->ah_radio_5ghz_revision);
650 /* Multi chip radio (RF5111 - RF2111) ->
651 * report both 2GHz/5GHz radios */
652 else if (sc->ah->ah_radio_5ghz_revision &&
653 sc->ah->ah_radio_2ghz_revision){
654 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
655 ath5k_chip_name(AR5K_VERSION_RAD,
656 sc->ah->ah_radio_5ghz_revision),
657 sc->ah->ah_radio_5ghz_revision);
658 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
659 ath5k_chip_name(AR5K_VERSION_RAD,
660 sc->ah->ah_radio_2ghz_revision),
661 sc->ah->ah_radio_2ghz_revision);
666 /* ready to process interrupts */
667 __clear_bit(ATH_STAT_INVALID, sc->status);
671 ath5k_hw_detach(sc->ah);
673 free_irq(pdev->irq, sc);
677 ieee80211_free_hw(hw);
679 pci_iounmap(pdev, mem);
681 pci_release_region(pdev, 0);
683 pci_disable_device(pdev);
688 static void __devexit
689 ath5k_pci_remove(struct pci_dev *pdev)
691 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
692 struct ath5k_softc *sc = hw->priv;
694 ath5k_debug_finish_device(sc);
695 ath5k_detach(pdev, hw);
696 ath5k_hw_detach(sc->ah);
698 free_irq(pdev->irq, sc);
699 pci_iounmap(pdev, sc->iobase);
700 pci_release_region(pdev, 0);
701 pci_disable_device(pdev);
702 ieee80211_free_hw(hw);
707 ath5k_pci_suspend(struct pci_dev *pdev, pm_message_t state)
709 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
710 struct ath5k_softc *sc = hw->priv;
714 pci_save_state(pdev);
715 pci_disable_device(pdev);
716 pci_set_power_state(pdev, PCI_D3hot);
722 ath5k_pci_resume(struct pci_dev *pdev)
724 struct ieee80211_hw *hw = pci_get_drvdata(pdev);
725 struct ath5k_softc *sc = hw->priv;
728 pci_restore_state(pdev);
730 err = pci_enable_device(pdev);
735 * Suspend/Resume resets the PCI configuration space, so we have to
736 * re-disable the RETRY_TIMEOUT register (0x41) to keep
737 * PCI Tx retries from interfering with C3 CPU state
739 pci_write_config_byte(pdev, 0x41, 0);
741 ath5k_led_enable(sc);
744 #endif /* CONFIG_PM */
747 /***********************\
748 * Driver Initialization *
749 \***********************/
751 static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
753 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
754 struct ath5k_softc *sc = hw->priv;
755 struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
757 return ath_reg_notifier_apply(wiphy, request, regulatory);
761 ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
763 struct ath5k_softc *sc = hw->priv;
764 struct ath5k_hw *ah = sc->ah;
765 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
766 u8 mac[ETH_ALEN] = {};
769 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
772 * Check if the MAC has multi-rate retry support.
773 * We do this by trying to setup a fake extended
774 * descriptor. MAC's that don't have support will
775 * return false w/o doing anything. MAC's that do
776 * support it will return true w/o doing anything.
778 ret = ah->ah_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
782 __set_bit(ATH_STAT_MRRETRY, sc->status);
785 * Collect the channel list. The 802.11 layer
786 * is resposible for filtering this list based
787 * on settings like the phy mode and regulatory
788 * domain restrictions.
790 ret = ath5k_setup_bands(hw);
792 ATH5K_ERR(sc, "can't get channels\n");
796 /* NB: setup here so ath5k_rate_update is happy */
797 if (test_bit(AR5K_MODE_11A, ah->ah_modes))
798 ath5k_setcurmode(sc, AR5K_MODE_11A);
800 ath5k_setcurmode(sc, AR5K_MODE_11B);
803 * Allocate tx+rx descriptors and populate the lists.
805 ret = ath5k_desc_alloc(sc, pdev);
807 ATH5K_ERR(sc, "can't allocate descriptors\n");
812 * Allocate hardware transmit queues: one queue for
813 * beacon frames and one data queue for each QoS
814 * priority. Note that hw functions handle reseting
815 * these queues at the needed time.
817 ret = ath5k_beaconq_setup(ah);
819 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
823 sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
824 if (IS_ERR(sc->cabq)) {
825 ATH5K_ERR(sc, "can't setup cab queue\n");
826 ret = PTR_ERR(sc->cabq);
830 sc->txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
831 if (IS_ERR(sc->txq)) {
832 ATH5K_ERR(sc, "can't setup xmit queue\n");
833 ret = PTR_ERR(sc->txq);
837 tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
838 tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
839 tasklet_init(&sc->restq, ath5k_tasklet_reset, (unsigned long)sc);
840 tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
841 tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
843 ret = ath5k_eeprom_read_mac(ah, mac);
845 ATH5K_ERR(sc, "unable to read address from EEPROM: 0x%04x\n",
850 SET_IEEE80211_PERM_ADDR(hw, mac);
851 /* All MAC address bits matter for ACKs */
852 memcpy(sc->bssidmask, ath_bcast_mac, ETH_ALEN);
853 ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
855 regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
856 ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
858 ATH5K_ERR(sc, "can't initialize regulatory system\n");
862 ret = ieee80211_register_hw(hw);
864 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
868 if (!ath_is_world_regd(regulatory))
869 regulatory_hint(hw->wiphy, regulatory->alpha2);
875 ath5k_txq_release(sc);
877 ath5k_hw_release_tx_queue(ah, sc->bhalq);
879 ath5k_desc_free(sc, pdev);
885 ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
887 struct ath5k_softc *sc = hw->priv;
890 * NB: the order of these is important:
891 * o call the 802.11 layer before detaching ath5k_hw to
892 * insure callbacks into the driver to delete global
893 * key cache entries can be handled
894 * o reclaim the tx queue data structures after calling
895 * the 802.11 layer as we'll get called back to reclaim
896 * node state and potentially want to use them
897 * o to cleanup the tx queues the hal is called, so detach
899 * XXX: ??? detach ath5k_hw ???
900 * Other than that, it's straightforward...
902 ieee80211_unregister_hw(hw);
903 ath5k_desc_free(sc, pdev);
904 ath5k_txq_release(sc);
905 ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
906 ath5k_unregister_leds(sc);
909 * NB: can't reclaim these until after ieee80211_ifdetach
910 * returns because we'll get called back to reclaim node
911 * state and potentially want to use them.
918 /********************\
919 * Channel/mode setup *
920 \********************/
923 * Convert IEEE channel number to MHz frequency.
926 ath5k_ieee2mhz(short chan)
928 if (chan <= 14 || chan >= 27)
929 return ieee80211chan2mhz(chan);
931 return 2212 + chan * 20;
935 * Returns true for the channel numbers used without all_channels modparam.
937 static bool ath5k_is_standard_channel(short chan)
939 return ((chan <= 14) ||
941 ((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
943 ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
945 ((chan & 3) == 1 && chan >= 149 && chan <= 165));
949 ath5k_copy_channels(struct ath5k_hw *ah,
950 struct ieee80211_channel *channels,
954 unsigned int i, count, size, chfreq, freq, ch;
956 if (!test_bit(mode, ah->ah_modes))
961 case AR5K_MODE_11A_TURBO:
962 /* 1..220, but 2GHz frequencies are filtered by check_channel */
964 chfreq = CHANNEL_5GHZ;
968 case AR5K_MODE_11G_TURBO:
970 chfreq = CHANNEL_2GHZ;
973 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
977 for (i = 0, count = 0; i < size && max > 0; i++) {
979 freq = ath5k_ieee2mhz(ch);
981 /* Check if channel is supported by the chipset */
982 if (!ath5k_channel_ok(ah, freq, chfreq))
985 if (!modparam_all_channels && !ath5k_is_standard_channel(ch))
988 /* Write channel info and increment counter */
989 channels[count].center_freq = freq;
990 channels[count].band = (chfreq == CHANNEL_2GHZ) ?
991 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
995 channels[count].hw_value = chfreq | CHANNEL_OFDM;
997 case AR5K_MODE_11A_TURBO:
998 case AR5K_MODE_11G_TURBO:
999 channels[count].hw_value = chfreq |
1000 CHANNEL_OFDM | CHANNEL_TURBO;
1003 channels[count].hw_value = CHANNEL_B;
1014 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
1018 for (i = 0; i < AR5K_MAX_RATES; i++)
1019 sc->rate_idx[b->band][i] = -1;
1021 for (i = 0; i < b->n_bitrates; i++) {
1022 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
1023 if (b->bitrates[i].hw_value_short)
1024 sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
1029 ath5k_setup_bands(struct ieee80211_hw *hw)
1031 struct ath5k_softc *sc = hw->priv;
1032 struct ath5k_hw *ah = sc->ah;
1033 struct ieee80211_supported_band *sband;
1034 int max_c, count_c = 0;
1037 BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
1038 max_c = ARRAY_SIZE(sc->channels);
1041 sband = &sc->sbands[IEEE80211_BAND_2GHZ];
1042 sband->band = IEEE80211_BAND_2GHZ;
1043 sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
1045 if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
1047 memcpy(sband->bitrates, &ath5k_rates[0],
1048 sizeof(struct ieee80211_rate) * 12);
1049 sband->n_bitrates = 12;
1051 sband->channels = sc->channels;
1052 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
1053 AR5K_MODE_11G, max_c);
1055 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
1056 count_c = sband->n_channels;
1058 } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
1060 memcpy(sband->bitrates, &ath5k_rates[0],
1061 sizeof(struct ieee80211_rate) * 4);
1062 sband->n_bitrates = 4;
1064 /* 5211 only supports B rates and uses 4bit rate codes
1065 * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
1068 if (ah->ah_version == AR5K_AR5211) {
1069 for (i = 0; i < 4; i++) {
1070 sband->bitrates[i].hw_value =
1071 sband->bitrates[i].hw_value & 0xF;
1072 sband->bitrates[i].hw_value_short =
1073 sband->bitrates[i].hw_value_short & 0xF;
1077 sband->channels = sc->channels;
1078 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
1079 AR5K_MODE_11B, max_c);
1081 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
1082 count_c = sband->n_channels;
1085 ath5k_setup_rate_idx(sc, sband);
1087 /* 5GHz band, A mode */
1088 if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
1089 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
1090 sband->band = IEEE80211_BAND_5GHZ;
1091 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
1093 memcpy(sband->bitrates, &ath5k_rates[4],
1094 sizeof(struct ieee80211_rate) * 8);
1095 sband->n_bitrates = 8;
1097 sband->channels = &sc->channels[count_c];
1098 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
1099 AR5K_MODE_11A, max_c);
1101 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
1103 ath5k_setup_rate_idx(sc, sband);
1105 ath5k_debug_dump_bands(sc);
1111 * Set/change channels. We always reset the chip.
1112 * To accomplish this we must first cleanup any pending DMA,
1113 * then restart stuff after a la ath5k_init.
1115 * Called with sc->lock.
1118 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
1120 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "(%u MHz) -> (%u MHz)\n",
1121 sc->curchan->center_freq, chan->center_freq);
1124 * To switch channels clear any pending DMA operations;
1125 * wait long enough for the RX fifo to drain, reset the
1126 * hardware at the new frequency, and then re-enable
1127 * the relevant bits of the h/w.
1129 return ath5k_reset(sc, chan);
1133 ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
1137 if (mode == AR5K_MODE_11A) {
1138 sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
1140 sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
1145 ath5k_mode_setup(struct ath5k_softc *sc)
1147 struct ath5k_hw *ah = sc->ah;
1150 ah->ah_op_mode = sc->opmode;
1152 /* configure rx filter */
1153 rfilt = sc->filter_flags;
1154 ath5k_hw_set_rx_filter(ah, rfilt);
1156 if (ath5k_hw_hasbssidmask(ah))
1157 ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
1159 /* configure operational mode */
1160 ath5k_hw_set_opmode(ah);
1162 ath5k_hw_set_mcast_filter(ah, 0, 0);
1163 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
1167 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
1171 /* return base rate on errors */
1172 if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
1173 "hw_rix out of bounds: %x\n", hw_rix))
1176 rix = sc->rate_idx[sc->curband->band][hw_rix];
1177 if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
1188 struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
1190 struct ath_common *common = ath5k_hw_common(sc->ah);
1191 struct sk_buff *skb;
1194 * Allocate buffer with headroom_needed space for the
1195 * fake physical layer header at the start.
1197 skb = ath_rxbuf_alloc(common,
1198 sc->rxbufsize + common->cachelsz - 1,
1202 ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
1203 sc->rxbufsize + common->cachelsz - 1);
1207 *skb_addr = pci_map_single(sc->pdev,
1208 skb->data, sc->rxbufsize, PCI_DMA_FROMDEVICE);
1209 if (unlikely(pci_dma_mapping_error(sc->pdev, *skb_addr))) {
1210 ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
1218 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1220 struct ath5k_hw *ah = sc->ah;
1221 struct sk_buff *skb = bf->skb;
1222 struct ath5k_desc *ds;
1225 skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
1232 * Setup descriptors. For receive we always terminate
1233 * the descriptor list with a self-linked entry so we'll
1234 * not get overrun under high load (as can happen with a
1235 * 5212 when ANI processing enables PHY error frames).
1237 * To insure the last descriptor is self-linked we create
1238 * each descriptor as self-linked and add it to the end. As
1239 * each additional descriptor is added the previous self-linked
1240 * entry is ``fixed'' naturally. This should be safe even
1241 * if DMA is happening. When processing RX interrupts we
1242 * never remove/process the last, self-linked, entry on the
1243 * descriptor list. This insures the hardware always has
1244 * someplace to write a new frame.
1247 ds->ds_link = bf->daddr; /* link to self */
1248 ds->ds_data = bf->skbaddr;
1249 ah->ah_setup_rx_desc(ah, ds,
1250 skb_tailroom(skb), /* buffer size */
1253 if (sc->rxlink != NULL)
1254 *sc->rxlink = bf->daddr;
1255 sc->rxlink = &ds->ds_link;
1260 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
1261 struct ath5k_txq *txq)
1263 struct ath5k_hw *ah = sc->ah;
1264 struct ath5k_desc *ds = bf->desc;
1265 struct sk_buff *skb = bf->skb;
1266 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1267 unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
1268 struct ieee80211_rate *rate;
1269 unsigned int mrr_rate[3], mrr_tries[3];
1276 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
1278 /* XXX endianness */
1279 bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
1282 rate = ieee80211_get_tx_rate(sc->hw, info);
1284 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
1285 flags |= AR5K_TXDESC_NOACK;
1287 rc_flags = info->control.rates[0].flags;
1288 hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
1289 rate->hw_value_short : rate->hw_value;
1293 /* FIXME: If we are in g mode and rate is a CCK rate
1294 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
1295 * from tx power (value is in dB units already) */
1296 if (info->control.hw_key) {
1297 keyidx = info->control.hw_key->hw_key_idx;
1298 pktlen += info->control.hw_key->icv_len;
1300 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
1301 flags |= AR5K_TXDESC_RTSENA;
1302 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
1303 duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
1304 sc->vif, pktlen, info));
1306 if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
1307 flags |= AR5K_TXDESC_CTSENA;
1308 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
1309 duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
1310 sc->vif, pktlen, info));
1312 ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
1313 ieee80211_get_hdrlen_from_skb(skb), AR5K_PKT_TYPE_NORMAL,
1314 (sc->power_level * 2),
1316 info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
1317 cts_rate, duration);
1321 memset(mrr_rate, 0, sizeof(mrr_rate));
1322 memset(mrr_tries, 0, sizeof(mrr_tries));
1323 for (i = 0; i < 3; i++) {
1324 rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
1328 mrr_rate[i] = rate->hw_value;
1329 mrr_tries[i] = info->control.rates[i + 1].count;
1332 ah->ah_setup_mrr_tx_desc(ah, ds,
1333 mrr_rate[0], mrr_tries[0],
1334 mrr_rate[1], mrr_tries[1],
1335 mrr_rate[2], mrr_tries[2]);
1338 ds->ds_data = bf->skbaddr;
1340 spin_lock_bh(&txq->lock);
1341 list_add_tail(&bf->list, &txq->q);
1342 sc->tx_stats[txq->qnum].len++;
1343 if (txq->link == NULL) /* is this first packet? */
1344 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
1345 else /* no, so only link it */
1346 *txq->link = bf->daddr;
1348 txq->link = &ds->ds_link;
1349 ath5k_hw_start_tx_dma(ah, txq->qnum);
1351 spin_unlock_bh(&txq->lock);
1355 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
1359 /*******************\
1360 * Descriptors setup *
1361 \*******************/
1364 ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
1366 struct ath5k_desc *ds;
1367 struct ath5k_buf *bf;
1372 /* allocate descriptors */
1373 sc->desc_len = sizeof(struct ath5k_desc) *
1374 (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
1375 sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr);
1376 if (sc->desc == NULL) {
1377 ATH5K_ERR(sc, "can't allocate descriptors\n");
1382 da = sc->desc_daddr;
1383 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
1384 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
1386 bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
1387 sizeof(struct ath5k_buf), GFP_KERNEL);
1389 ATH5K_ERR(sc, "can't allocate bufptr\n");
1395 INIT_LIST_HEAD(&sc->rxbuf);
1396 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
1399 list_add_tail(&bf->list, &sc->rxbuf);
1402 INIT_LIST_HEAD(&sc->txbuf);
1403 sc->txbuf_len = ATH_TXBUF;
1404 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
1405 da += sizeof(*ds)) {
1408 list_add_tail(&bf->list, &sc->txbuf);
1418 pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
1425 ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev)
1427 struct ath5k_buf *bf;
1429 ath5k_txbuf_free(sc, sc->bbuf);
1430 list_for_each_entry(bf, &sc->txbuf, list)
1431 ath5k_txbuf_free(sc, bf);
1432 list_for_each_entry(bf, &sc->rxbuf, list)
1433 ath5k_rxbuf_free(sc, bf);
1435 /* Free memory associated with all descriptors */
1436 pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
1450 static struct ath5k_txq *
1451 ath5k_txq_setup(struct ath5k_softc *sc,
1452 int qtype, int subtype)
1454 struct ath5k_hw *ah = sc->ah;
1455 struct ath5k_txq *txq;
1456 struct ath5k_txq_info qi = {
1457 .tqi_subtype = subtype,
1458 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
1459 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
1460 .tqi_cw_max = AR5K_TXQ_USEDEFAULT
1465 * Enable interrupts only for EOL and DESC conditions.
1466 * We mark tx descriptors to receive a DESC interrupt
1467 * when a tx queue gets deep; otherwise waiting for the
1468 * EOL to reap descriptors. Note that this is done to
1469 * reduce interrupt load and this only defers reaping
1470 * descriptors, never transmitting frames. Aside from
1471 * reducing interrupts this also permits more concurrency.
1472 * The only potential downside is if the tx queue backs
1473 * up in which case the top half of the kernel may backup
1474 * due to a lack of tx descriptors.
1476 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
1477 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
1478 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
1481 * NB: don't print a message, this happens
1482 * normally on parts with too few tx queues
1484 return ERR_PTR(qnum);
1486 if (qnum >= ARRAY_SIZE(sc->txqs)) {
1487 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
1488 qnum, ARRAY_SIZE(sc->txqs));
1489 ath5k_hw_release_tx_queue(ah, qnum);
1490 return ERR_PTR(-EINVAL);
1492 txq = &sc->txqs[qnum];
1496 INIT_LIST_HEAD(&txq->q);
1497 spin_lock_init(&txq->lock);
1500 return &sc->txqs[qnum];
1504 ath5k_beaconq_setup(struct ath5k_hw *ah)
1506 struct ath5k_txq_info qi = {
1507 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
1508 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
1509 .tqi_cw_max = AR5K_TXQ_USEDEFAULT,
1510 /* NB: for dynamic turbo, don't enable any other interrupts */
1511 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
1514 return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
1518 ath5k_beaconq_config(struct ath5k_softc *sc)
1520 struct ath5k_hw *ah = sc->ah;
1521 struct ath5k_txq_info qi;
1524 ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
1527 if (sc->opmode == NL80211_IFTYPE_AP ||
1528 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1530 * Always burst out beacon and CAB traffic
1531 * (aifs = cwmin = cwmax = 0)
1536 } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
1538 * Adhoc mode; backoff between 0 and (2 * cw_min).
1542 qi.tqi_cw_max = 2 * ah->ah_cw_min;
1545 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1546 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1547 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
1549 ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
1551 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
1552 "hardware queue!\n", __func__);
1556 return ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */;
1560 ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1562 struct ath5k_buf *bf, *bf0;
1565 * NB: this assumes output has been stopped and
1566 * we do not need to block ath5k_tx_tasklet
1568 spin_lock_bh(&txq->lock);
1569 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1570 ath5k_debug_printtxbuf(sc, bf);
1572 ath5k_txbuf_free(sc, bf);
1574 spin_lock_bh(&sc->txbuflock);
1575 sc->tx_stats[txq->qnum].len--;
1576 list_move_tail(&bf->list, &sc->txbuf);
1578 spin_unlock_bh(&sc->txbuflock);
1581 spin_unlock_bh(&txq->lock);
1585 * Drain the transmit queues and reclaim resources.
1588 ath5k_txq_cleanup(struct ath5k_softc *sc)
1590 struct ath5k_hw *ah = sc->ah;
1593 /* XXX return value */
1594 if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
1595 /* don't touch the hardware if marked invalid */
1596 ath5k_hw_stop_tx_dma(ah, sc->bhalq);
1597 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
1598 ath5k_hw_get_txdp(ah, sc->bhalq));
1599 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1600 if (sc->txqs[i].setup) {
1601 ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
1602 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
1605 ath5k_hw_get_txdp(ah,
1610 ieee80211_wake_queues(sc->hw); /* XXX move to callers */
1612 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1613 if (sc->txqs[i].setup)
1614 ath5k_txq_drainq(sc, &sc->txqs[i]);
1618 ath5k_txq_release(struct ath5k_softc *sc)
1620 struct ath5k_txq *txq = sc->txqs;
1623 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1625 ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1638 * Enable the receive h/w following a reset.
1641 ath5k_rx_start(struct ath5k_softc *sc)
1643 struct ath5k_hw *ah = sc->ah;
1644 struct ath_common *common = ath5k_hw_common(ah);
1645 struct ath5k_buf *bf;
1648 sc->rxbufsize = roundup(IEEE80211_MAX_LEN, common->cachelsz);
1650 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rxbufsize %u\n",
1651 common->cachelsz, sc->rxbufsize);
1653 spin_lock_bh(&sc->rxbuflock);
1655 list_for_each_entry(bf, &sc->rxbuf, list) {
1656 ret = ath5k_rxbuf_setup(sc, bf);
1658 spin_unlock_bh(&sc->rxbuflock);
1662 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1663 ath5k_hw_set_rxdp(ah, bf->daddr);
1664 spin_unlock_bh(&sc->rxbuflock);
1666 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
1667 ath5k_mode_setup(sc); /* set filters, etc. */
1668 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
1676 * Disable the receive h/w in preparation for a reset.
1679 ath5k_rx_stop(struct ath5k_softc *sc)
1681 struct ath5k_hw *ah = sc->ah;
1683 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
1684 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
1685 ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */
1687 ath5k_debug_printrxbuffs(sc, ah);
1689 sc->rxlink = NULL; /* just in case */
1693 ath5k_rx_decrypted(struct ath5k_softc *sc, struct ath5k_desc *ds,
1694 struct sk_buff *skb, struct ath5k_rx_status *rs)
1696 struct ieee80211_hdr *hdr = (void *)skb->data;
1697 unsigned int keyix, hlen;
1699 if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1700 rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1701 return RX_FLAG_DECRYPTED;
1703 /* Apparently when a default key is used to decrypt the packet
1704 the hw does not set the index used to decrypt. In such cases
1705 get the index from the packet. */
1706 hlen = ieee80211_hdrlen(hdr->frame_control);
1707 if (ieee80211_has_protected(hdr->frame_control) &&
1708 !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1709 skb->len >= hlen + 4) {
1710 keyix = skb->data[hlen + 3] >> 6;
1712 if (test_bit(keyix, sc->keymap))
1713 return RX_FLAG_DECRYPTED;
1721 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1722 struct ieee80211_rx_status *rxs)
1724 struct ath_common *common = ath5k_hw_common(sc->ah);
1727 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1729 if (ieee80211_is_beacon(mgmt->frame_control) &&
1730 le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1731 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
1733 * Received an IBSS beacon with the same BSSID. Hardware *must*
1734 * have updated the local TSF. We have to work around various
1735 * hardware bugs, though...
1737 tsf = ath5k_hw_get_tsf64(sc->ah);
1738 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1739 hw_tu = TSF_TO_TU(tsf);
1741 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1742 "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1743 (unsigned long long)bc_tstamp,
1744 (unsigned long long)rxs->mactime,
1745 (unsigned long long)(rxs->mactime - bc_tstamp),
1746 (unsigned long long)tsf);
1749 * Sometimes the HW will give us a wrong tstamp in the rx
1750 * status, causing the timestamp extension to go wrong.
1751 * (This seems to happen especially with beacon frames bigger
1752 * than 78 byte (incl. FCS))
1753 * But we know that the receive timestamp must be later than the
1754 * timestamp of the beacon since HW must have synced to that.
1756 * NOTE: here we assume mactime to be after the frame was
1757 * received, not like mac80211 which defines it at the start.
1759 if (bc_tstamp > rxs->mactime) {
1760 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1761 "fixing mactime from %llx to %llx\n",
1762 (unsigned long long)rxs->mactime,
1763 (unsigned long long)tsf);
1768 * Local TSF might have moved higher than our beacon timers,
1769 * in that case we have to update them to continue sending
1770 * beacons. This also takes care of synchronizing beacon sending
1771 * times with other stations.
1773 if (hw_tu >= sc->nexttbtt)
1774 ath5k_beacon_update_timers(sc, bc_tstamp);
1779 ath5k_tasklet_rx(unsigned long data)
1781 struct ieee80211_rx_status *rxs;
1782 struct ath5k_rx_status rs = {};
1783 struct sk_buff *skb, *next_skb;
1784 dma_addr_t next_skb_addr;
1785 struct ath5k_softc *sc = (void *)data;
1786 struct ath5k_buf *bf;
1787 struct ath5k_desc *ds;
1793 spin_lock(&sc->rxbuflock);
1794 if (list_empty(&sc->rxbuf)) {
1795 ATH5K_WARN(sc, "empty rx buf pool\n");
1801 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1802 BUG_ON(bf->skb == NULL);
1806 /* bail if HW is still using self-linked descriptor */
1807 if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
1810 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1811 if (unlikely(ret == -EINPROGRESS))
1813 else if (unlikely(ret)) {
1814 ATH5K_ERR(sc, "error in processing rx descriptor\n");
1815 spin_unlock(&sc->rxbuflock);
1819 if (unlikely(rs.rs_more)) {
1820 ATH5K_WARN(sc, "unsupported jumbo\n");
1824 if (unlikely(rs.rs_status)) {
1825 if (rs.rs_status & AR5K_RXERR_PHY)
1827 if (rs.rs_status & AR5K_RXERR_DECRYPT) {
1829 * Decrypt error. If the error occurred
1830 * because there was no hardware key, then
1831 * let the frame through so the upper layers
1832 * can process it. This is necessary for 5210
1833 * parts which have no way to setup a ``clear''
1836 * XXX do key cache faulting
1838 if (rs.rs_keyix == AR5K_RXKEYIX_INVALID &&
1839 !(rs.rs_status & AR5K_RXERR_CRC))
1842 if (rs.rs_status & AR5K_RXERR_MIC) {
1843 rx_flag |= RX_FLAG_MMIC_ERROR;
1847 /* let crypto-error packets fall through in MNTR */
1849 ~(AR5K_RXERR_DECRYPT|AR5K_RXERR_MIC)) ||
1850 sc->opmode != NL80211_IFTYPE_MONITOR)
1854 next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
1857 * If we can't replace bf->skb with a new skb under memory
1858 * pressure, just skip this packet
1863 pci_unmap_single(sc->pdev, bf->skbaddr, sc->rxbufsize,
1864 PCI_DMA_FROMDEVICE);
1865 skb_put(skb, rs.rs_datalen);
1867 /* The MAC header is padded to have 32-bit boundary if the
1868 * packet payload is non-zero. The general calculation for
1869 * padsize would take into account odd header lengths:
1870 * padsize = (4 - hdrlen % 4) % 4; However, since only
1871 * even-length headers are used, padding can only be 0 or 2
1872 * bytes and we can optimize this a bit. In addition, we must
1873 * not try to remove padding from short control frames that do
1874 * not have payload. */
1875 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1876 padsize = ath5k_pad_size(hdrlen);
1878 memmove(skb->data + padsize, skb->data, hdrlen);
1879 skb_pull(skb, padsize);
1881 rxs = IEEE80211_SKB_RXCB(skb);
1884 * always extend the mac timestamp, since this information is
1885 * also needed for proper IBSS merging.
1887 * XXX: it might be too late to do it here, since rs_tstamp is
1888 * 15bit only. that means TSF extension has to be done within
1889 * 32768usec (about 32ms). it might be necessary to move this to
1890 * the interrupt handler, like it is done in madwifi.
1892 * Unfortunately we don't know when the hardware takes the rx
1893 * timestamp (beginning of phy frame, data frame, end of rx?).
1894 * The only thing we know is that it is hardware specific...
1895 * On AR5213 it seems the rx timestamp is at the end of the
1896 * frame, but i'm not sure.
1898 * NOTE: mac80211 defines mactime at the beginning of the first
1899 * data symbol. Since we don't have any time references it's
1900 * impossible to comply to that. This affects IBSS merge only
1901 * right now, so it's not too bad...
1903 rxs->mactime = ath5k_extend_tsf(sc->ah, rs.rs_tstamp);
1904 rxs->flag = rx_flag | RX_FLAG_TSFT;
1906 rxs->freq = sc->curchan->center_freq;
1907 rxs->band = sc->curband->band;
1909 rxs->noise = sc->ah->ah_noise_floor;
1910 rxs->signal = rxs->noise + rs.rs_rssi;
1912 /* An rssi of 35 indicates you should be able use
1913 * 54 Mbps reliably. A more elaborate scheme can be used
1914 * here but it requires a map of SNR/throughput for each
1915 * possible mode used */
1916 rxs->qual = rs.rs_rssi * 100 / 35;
1918 /* rssi can be more than 35 though, anything above that
1919 * should be considered at 100% */
1920 if (rxs->qual > 100)
1923 rxs->antenna = rs.rs_antenna;
1924 rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs.rs_rate);
1925 rxs->flag |= ath5k_rx_decrypted(sc, ds, skb, &rs);
1927 if (rxs->rate_idx >= 0 && rs.rs_rate ==
1928 sc->curband->bitrates[rxs->rate_idx].hw_value_short)
1929 rxs->flag |= RX_FLAG_SHORTPRE;
1931 ath5k_debug_dump_skb(sc, skb, "RX ", 0);
1933 /* check beacons in IBSS mode */
1934 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1935 ath5k_check_ibss_tsf(sc, skb, rxs);
1937 ieee80211_rx(sc->hw, skb);
1940 bf->skbaddr = next_skb_addr;
1942 list_move_tail(&bf->list, &sc->rxbuf);
1943 } while (ath5k_rxbuf_setup(sc, bf) == 0);
1945 spin_unlock(&sc->rxbuflock);
1956 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1958 struct ath5k_tx_status ts = {};
1959 struct ath5k_buf *bf, *bf0;
1960 struct ath5k_desc *ds;
1961 struct sk_buff *skb;
1962 struct ieee80211_tx_info *info;
1965 spin_lock(&txq->lock);
1966 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1969 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1970 if (unlikely(ret == -EINPROGRESS))
1972 else if (unlikely(ret)) {
1973 ATH5K_ERR(sc, "error %d while processing queue %u\n",
1979 info = IEEE80211_SKB_CB(skb);
1982 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
1985 ieee80211_tx_info_clear_status(info);
1986 for (i = 0; i < 4; i++) {
1987 struct ieee80211_tx_rate *r =
1988 &info->status.rates[i];
1990 if (ts.ts_rate[i]) {
1991 r->idx = ath5k_hw_to_driver_rix(sc, ts.ts_rate[i]);
1992 r->count = ts.ts_retry[i];
1999 /* count the successful attempt as well */
2000 info->status.rates[ts.ts_final_idx].count++;
2002 if (unlikely(ts.ts_status)) {
2003 sc->ll_stats.dot11ACKFailureCount++;
2004 if (ts.ts_status & AR5K_TXERR_FILT)
2005 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
2007 info->flags |= IEEE80211_TX_STAT_ACK;
2008 info->status.ack_signal = ts.ts_rssi;
2011 ieee80211_tx_status(sc->hw, skb);
2012 sc->tx_stats[txq->qnum].count++;
2014 spin_lock(&sc->txbuflock);
2015 sc->tx_stats[txq->qnum].len--;
2016 list_move_tail(&bf->list, &sc->txbuf);
2018 spin_unlock(&sc->txbuflock);
2020 if (likely(list_empty(&txq->q)))
2022 spin_unlock(&txq->lock);
2023 if (sc->txbuf_len > ATH_TXBUF / 5)
2024 ieee80211_wake_queues(sc->hw);
2028 ath5k_tasklet_tx(unsigned long data)
2031 struct ath5k_softc *sc = (void *)data;
2033 for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
2034 if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
2035 ath5k_tx_processq(sc, &sc->txqs[i]);
2044 * Setup the beacon frame for transmit.
2047 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
2049 struct sk_buff *skb = bf->skb;
2050 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
2051 struct ath5k_hw *ah = sc->ah;
2052 struct ath5k_desc *ds;
2057 bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
2059 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
2060 "skbaddr %llx\n", skb, skb->data, skb->len,
2061 (unsigned long long)bf->skbaddr);
2062 if (pci_dma_mapping_error(sc->pdev, bf->skbaddr)) {
2063 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
2068 antenna = ah->ah_tx_ant;
2070 flags = AR5K_TXDESC_NOACK;
2071 if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
2072 ds->ds_link = bf->daddr; /* self-linked */
2073 flags |= AR5K_TXDESC_VEOL;
2078 * If we use multiple antennas on AP and use
2079 * the Sectored AP scenario, switch antenna every
2080 * 4 beacons to make sure everybody hears our AP.
2081 * When a client tries to associate, hw will keep
2082 * track of the tx antenna to be used for this client
2083 * automaticaly, based on ACKed packets.
2085 * Note: AP still listens and transmits RTS on the
2086 * default antenna which is supposed to be an omni.
2088 * Note2: On sectored scenarios it's possible to have
2089 * multiple antennas (1omni -the default- and 14 sectors)
2090 * so if we choose to actually support this mode we need
2091 * to allow user to set how many antennas we have and tweak
2092 * the code below to send beacons on all of them.
2094 if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP)
2095 antenna = sc->bsent & 4 ? 2 : 1;
2098 /* FIXME: If we are in g mode and rate is a CCK rate
2099 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
2100 * from tx power (value is in dB units already) */
2101 ds->ds_data = bf->skbaddr;
2102 ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
2103 ieee80211_get_hdrlen_from_skb(skb),
2104 AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
2105 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
2106 1, AR5K_TXKEYIX_INVALID,
2107 antenna, flags, 0, 0);
2113 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
2118 * Transmit a beacon frame at SWBA. Dynamic updates to the
2119 * frame contents are done as needed and the slot time is
2120 * also adjusted based on current state.
2122 * This is called from software irq context (beacontq or restq
2123 * tasklets) or user context from ath5k_beacon_config.
2126 ath5k_beacon_send(struct ath5k_softc *sc)
2128 struct ath5k_buf *bf = sc->bbuf;
2129 struct ath5k_hw *ah = sc->ah;
2130 struct sk_buff *skb;
2132 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
2134 if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
2135 sc->opmode == NL80211_IFTYPE_MONITOR)) {
2136 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
2140 * Check if the previous beacon has gone out. If
2141 * not don't don't try to post another, skip this
2142 * period and wait for the next. Missed beacons
2143 * indicate a problem and should not occur. If we
2144 * miss too many consecutive beacons reset the device.
2146 if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
2148 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2149 "missed %u consecutive beacons\n", sc->bmisscount);
2150 if (sc->bmisscount > 10) { /* NB: 10 is a guess */
2151 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2152 "stuck beacon time (%u missed)\n",
2154 tasklet_schedule(&sc->restq);
2158 if (unlikely(sc->bmisscount != 0)) {
2159 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2160 "resume beacon xmit after %u misses\n",
2166 * Stop any current dma and put the new frame on the queue.
2167 * This should never fail since we check above that no frames
2168 * are still pending on the queue.
2170 if (unlikely(ath5k_hw_stop_tx_dma(ah, sc->bhalq))) {
2171 ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
2172 /* NB: hw still stops DMA, so proceed */
2175 /* refresh the beacon for AP mode */
2176 if (sc->opmode == NL80211_IFTYPE_AP)
2177 ath5k_beacon_update(sc->hw, sc->vif);
2179 ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
2180 ath5k_hw_start_tx_dma(ah, sc->bhalq);
2181 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
2182 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
2184 skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
2186 ath5k_tx_queue(sc->hw, skb, sc->cabq);
2187 skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
2195 * ath5k_beacon_update_timers - update beacon timers
2197 * @sc: struct ath5k_softc pointer we are operating on
2198 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
2199 * beacon timer update based on the current HW TSF.
2201 * Calculate the next target beacon transmit time (TBTT) based on the timestamp
2202 * of a received beacon or the current local hardware TSF and write it to the
2203 * beacon timer registers.
2205 * This is called in a variety of situations, e.g. when a beacon is received,
2206 * when a TSF update has been detected, but also when an new IBSS is created or
2207 * when we otherwise know we have to update the timers, but we keep it in this
2208 * function to have it all together in one place.
2211 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
2213 struct ath5k_hw *ah = sc->ah;
2214 u32 nexttbtt, intval, hw_tu, bc_tu;
2217 intval = sc->bintval & AR5K_BEACON_PERIOD;
2218 if (WARN_ON(!intval))
2221 /* beacon TSF converted to TU */
2222 bc_tu = TSF_TO_TU(bc_tsf);
2224 /* current TSF converted to TU */
2225 hw_tsf = ath5k_hw_get_tsf64(ah);
2226 hw_tu = TSF_TO_TU(hw_tsf);
2229 /* we use FUDGE to make sure the next TBTT is ahead of the current TU */
2232 * no beacons received, called internally.
2233 * just need to refresh timers based on HW TSF.
2235 nexttbtt = roundup(hw_tu + FUDGE, intval);
2236 } else if (bc_tsf == 0) {
2238 * no beacon received, probably called by ath5k_reset_tsf().
2239 * reset TSF to start with 0.
2242 intval |= AR5K_BEACON_RESET_TSF;
2243 } else if (bc_tsf > hw_tsf) {
2245 * beacon received, SW merge happend but HW TSF not yet updated.
2246 * not possible to reconfigure timers yet, but next time we
2247 * receive a beacon with the same BSSID, the hardware will
2248 * automatically update the TSF and then we need to reconfigure
2251 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2252 "need to wait for HW TSF sync\n");
2256 * most important case for beacon synchronization between STA.
2258 * beacon received and HW TSF has been already updated by HW.
2259 * update next TBTT based on the TSF of the beacon, but make
2260 * sure it is ahead of our local TSF timer.
2262 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
2266 sc->nexttbtt = nexttbtt;
2268 intval |= AR5K_BEACON_ENA;
2269 ath5k_hw_init_beacon(ah, nexttbtt, intval);
2272 * debugging output last in order to preserve the time critical aspect
2276 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2277 "reconfigured timers based on HW TSF\n");
2278 else if (bc_tsf == 0)
2279 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2280 "reset HW TSF and timers\n");
2282 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2283 "updated timers based on beacon TSF\n");
2285 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2286 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2287 (unsigned long long) bc_tsf,
2288 (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
2289 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
2290 intval & AR5K_BEACON_PERIOD,
2291 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
2292 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
2297 * ath5k_beacon_config - Configure the beacon queues and interrupts
2299 * @sc: struct ath5k_softc pointer we are operating on
2301 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2302 * interrupts to detect TSF updates only.
2305 ath5k_beacon_config(struct ath5k_softc *sc)
2307 struct ath5k_hw *ah = sc->ah;
2308 unsigned long flags;
2310 spin_lock_irqsave(&sc->block, flags);
2312 sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
2314 if (sc->enable_beacon) {
2316 * In IBSS mode we use a self-linked tx descriptor and let the
2317 * hardware send the beacons automatically. We have to load it
2319 * We use the SWBA interrupt only to keep track of the beacon
2320 * timers in order to detect automatic TSF updates.
2322 ath5k_beaconq_config(sc);
2324 sc->imask |= AR5K_INT_SWBA;
2326 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2327 if (ath5k_hw_hasveol(ah))
2328 ath5k_beacon_send(sc);
2330 ath5k_beacon_update_timers(sc, -1);
2332 ath5k_hw_stop_tx_dma(sc->ah, sc->bhalq);
2335 ath5k_hw_set_imr(ah, sc->imask);
2337 spin_unlock_irqrestore(&sc->block, flags);
2340 static void ath5k_tasklet_beacon(unsigned long data)
2342 struct ath5k_softc *sc = (struct ath5k_softc *) data;
2345 * Software beacon alert--time to send a beacon.
2347 * In IBSS mode we use this interrupt just to
2348 * keep track of the next TBTT (target beacon
2349 * transmission time) in order to detect wether
2350 * automatic TSF updates happened.
2352 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2353 /* XXX: only if VEOL suppported */
2354 u64 tsf = ath5k_hw_get_tsf64(sc->ah);
2355 sc->nexttbtt += sc->bintval;
2356 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2357 "SWBA nexttbtt: %x hw_tu: %x "
2361 (unsigned long long) tsf);
2363 spin_lock(&sc->block);
2364 ath5k_beacon_send(sc);
2365 spin_unlock(&sc->block);
2370 /********************\
2371 * Interrupt handling *
2372 \********************/
2375 ath5k_init(struct ath5k_softc *sc)
2377 struct ath5k_hw *ah = sc->ah;
2380 mutex_lock(&sc->lock);
2382 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2385 * Stop anything previously setup. This is safe
2386 * no matter this is the first time through or not.
2388 ath5k_stop_locked(sc);
2391 * The basic interface to setting the hardware in a good
2392 * state is ``reset''. On return the hardware is known to
2393 * be powered up and with interrupts disabled. This must
2394 * be followed by initialization of the appropriate bits
2395 * and then setup of the interrupt mask.
2397 sc->curchan = sc->hw->conf.channel;
2398 sc->curband = &sc->sbands[sc->curchan->band];
2399 sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
2400 AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
2401 AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_SWI;
2402 ret = ath5k_reset(sc, NULL);
2406 ath5k_rfkill_hw_start(ah);
2409 * Reset the key cache since some parts do not reset the
2410 * contents on initial power up or resume from suspend.
2412 for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
2413 ath5k_hw_reset_key(ah, i);
2415 /* Set ack to be sent at low bit-rates */
2416 ath5k_hw_set_ack_bitrate_high(ah, false);
2418 /* Set PHY calibration inteval */
2419 ah->ah_cal_intval = ath5k_calinterval;
2424 mutex_unlock(&sc->lock);
2429 ath5k_stop_locked(struct ath5k_softc *sc)
2431 struct ath5k_hw *ah = sc->ah;
2433 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2434 test_bit(ATH_STAT_INVALID, sc->status));
2437 * Shutdown the hardware and driver:
2438 * stop output from above
2439 * disable interrupts
2441 * turn off the radio
2442 * clear transmit machinery
2443 * clear receive machinery
2444 * drain and release tx queues
2445 * reclaim beacon resources
2446 * power down hardware
2448 * Note that some of this work is not possible if the
2449 * hardware is gone (invalid).
2451 ieee80211_stop_queues(sc->hw);
2453 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2455 ath5k_hw_set_imr(ah, 0);
2456 synchronize_irq(sc->pdev->irq);
2458 ath5k_txq_cleanup(sc);
2459 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2461 ath5k_hw_phy_disable(ah);
2469 * Stop the device, grabbing the top-level lock to protect
2470 * against concurrent entry through ath5k_init (which can happen
2471 * if another thread does a system call and the thread doing the
2472 * stop is preempted).
2475 ath5k_stop_hw(struct ath5k_softc *sc)
2479 mutex_lock(&sc->lock);
2480 ret = ath5k_stop_locked(sc);
2481 if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2483 * Don't set the card in full sleep mode!
2485 * a) When the device is in this state it must be carefully
2486 * woken up or references to registers in the PCI clock
2487 * domain may freeze the bus (and system). This varies
2488 * by chip and is mostly an issue with newer parts
2489 * (madwifi sources mentioned srev >= 0x78) that go to
2490 * sleep more quickly.
2492 * b) On older chips full sleep results a weird behaviour
2493 * during wakeup. I tested various cards with srev < 0x78
2494 * and they don't wake up after module reload, a second
2495 * module reload is needed to bring the card up again.
2497 * Until we figure out what's going on don't enable
2498 * full chip reset on any chip (this is what Legacy HAL
2499 * and Sam's HAL do anyway). Instead Perform a full reset
2500 * on the device (same as initial state after attach) and
2501 * leave it idle (keep MAC/BB on warm reset) */
2502 ret = ath5k_hw_on_hold(sc->ah);
2504 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2505 "putting device to sleep\n");
2507 ath5k_txbuf_free(sc, sc->bbuf);
2510 mutex_unlock(&sc->lock);
2512 tasklet_kill(&sc->rxtq);
2513 tasklet_kill(&sc->txtq);
2514 tasklet_kill(&sc->restq);
2515 tasklet_kill(&sc->calib);
2516 tasklet_kill(&sc->beacontq);
2518 ath5k_rfkill_hw_stop(sc->ah);
2524 ath5k_intr(int irq, void *dev_id)
2526 struct ath5k_softc *sc = dev_id;
2527 struct ath5k_hw *ah = sc->ah;
2528 enum ath5k_int status;
2529 unsigned int counter = 1000;
2531 if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2532 !ath5k_hw_is_intr_pending(ah)))
2536 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
2537 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2539 if (unlikely(status & AR5K_INT_FATAL)) {
2541 * Fatal errors are unrecoverable.
2542 * Typically these are caused by DMA errors.
2544 tasklet_schedule(&sc->restq);
2545 } else if (unlikely(status & AR5K_INT_RXORN)) {
2546 tasklet_schedule(&sc->restq);
2548 if (status & AR5K_INT_SWBA) {
2549 tasklet_hi_schedule(&sc->beacontq);
2551 if (status & AR5K_INT_RXEOL) {
2553 * NB: the hardware should re-read the link when
2554 * RXE bit is written, but it doesn't work at
2555 * least on older hardware revs.
2559 if (status & AR5K_INT_TXURN) {
2560 /* bump tx trigger level */
2561 ath5k_hw_update_tx_triglevel(ah, true);
2563 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
2564 tasklet_schedule(&sc->rxtq);
2565 if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
2566 | AR5K_INT_TXERR | AR5K_INT_TXEOL))
2567 tasklet_schedule(&sc->txtq);
2568 if (status & AR5K_INT_BMISS) {
2571 if (status & AR5K_INT_SWI) {
2572 tasklet_schedule(&sc->calib);
2574 if (status & AR5K_INT_MIB) {
2576 * These stats are also used for ANI i think
2577 * so how about updating them more often ?
2579 ath5k_hw_update_mib_counters(ah, &sc->ll_stats);
2581 if (status & AR5K_INT_GPIO)
2582 tasklet_schedule(&sc->rf_kill.toggleq);
2585 } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
2587 if (unlikely(!counter))
2588 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2590 ath5k_hw_calibration_poll(ah);
2596 ath5k_tasklet_reset(unsigned long data)
2598 struct ath5k_softc *sc = (void *)data;
2600 ath5k_reset_wake(sc);
2604 * Periodically recalibrate the PHY to account
2605 * for temperature/environment changes.
2608 ath5k_tasklet_calibrate(unsigned long data)
2610 struct ath5k_softc *sc = (void *)data;
2611 struct ath5k_hw *ah = sc->ah;
2613 /* Only full calibration for now */
2614 if (ah->ah_swi_mask != AR5K_SWI_FULL_CALIBRATION)
2617 /* Stop queues so that calibration
2618 * doesn't interfere with tx */
2619 ieee80211_stop_queues(sc->hw);
2621 ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2622 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2623 sc->curchan->hw_value);
2625 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2627 * Rfgain is out of bounds, reset the chip
2628 * to load new gain values.
2630 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2631 ath5k_reset_wake(sc);
2633 if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2634 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2635 ieee80211_frequency_to_channel(
2636 sc->curchan->center_freq));
2638 ah->ah_swi_mask = 0;
2641 ieee80211_wake_queues(sc->hw);
2646 /********************\
2647 * Mac80211 functions *
2648 \********************/
2651 ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2653 struct ath5k_softc *sc = hw->priv;
2655 return ath5k_tx_queue(hw, skb, sc->txq);
2658 static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
2659 struct ath5k_txq *txq)
2661 struct ath5k_softc *sc = hw->priv;
2662 struct ath5k_buf *bf;
2663 unsigned long flags;
2667 ath5k_debug_dump_skb(sc, skb, "TX ", 1);
2669 if (sc->opmode == NL80211_IFTYPE_MONITOR)
2670 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, "tx in monitor (scan?)\n");
2673 * the hardware expects the header padded to 4 byte boundaries
2674 * if this is not the case we add the padding after the header
2676 hdrlen = ieee80211_get_hdrlen_from_skb(skb);
2677 padsize = ath5k_pad_size(hdrlen);
2680 if (skb_headroom(skb) < padsize) {
2681 ATH5K_ERR(sc, "tx hdrlen not %%4: %d not enough"
2682 " headroom to pad %d\n", hdrlen, padsize);
2685 skb_push(skb, padsize);
2686 memmove(skb->data, skb->data+padsize, hdrlen);
2689 spin_lock_irqsave(&sc->txbuflock, flags);
2690 if (list_empty(&sc->txbuf)) {
2691 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
2692 spin_unlock_irqrestore(&sc->txbuflock, flags);
2693 ieee80211_stop_queue(hw, skb_get_queue_mapping(skb));
2696 bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
2697 list_del(&bf->list);
2699 if (list_empty(&sc->txbuf))
2700 ieee80211_stop_queues(hw);
2701 spin_unlock_irqrestore(&sc->txbuflock, flags);
2705 if (ath5k_txbuf_setup(sc, bf, txq)) {
2707 spin_lock_irqsave(&sc->txbuflock, flags);
2708 list_add_tail(&bf->list, &sc->txbuf);
2710 spin_unlock_irqrestore(&sc->txbuflock, flags);
2713 return NETDEV_TX_OK;
2716 dev_kfree_skb_any(skb);
2717 return NETDEV_TX_OK;
2721 * Reset the hardware. If chan is not NULL, then also pause rx/tx
2722 * and change to the given channel.
2725 ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan)
2727 struct ath5k_hw *ah = sc->ah;
2730 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2733 ath5k_hw_set_imr(ah, 0);
2734 ath5k_txq_cleanup(sc);
2738 sc->curband = &sc->sbands[chan->band];
2740 ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL);
2742 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2746 ret = ath5k_rx_start(sc);
2748 ATH5K_ERR(sc, "can't start recv logic\n");
2753 * Change channels and update the h/w rate map if we're switching;
2754 * e.g. 11a to 11b/g.
2756 * We may be doing a reset in response to an ioctl that changes the
2757 * channel so update any state that might change as a result.
2761 /* ath5k_chan_change(sc, c); */
2763 ath5k_beacon_config(sc);
2764 /* intrs are enabled by ath5k_beacon_config */
2772 ath5k_reset_wake(struct ath5k_softc *sc)
2776 ret = ath5k_reset(sc, sc->curchan);
2778 ieee80211_wake_queues(sc->hw);
2783 static int ath5k_start(struct ieee80211_hw *hw)
2785 return ath5k_init(hw->priv);
2788 static void ath5k_stop(struct ieee80211_hw *hw)
2790 ath5k_stop_hw(hw->priv);
2793 static int ath5k_add_interface(struct ieee80211_hw *hw,
2794 struct ieee80211_if_init_conf *conf)
2796 struct ath5k_softc *sc = hw->priv;
2799 mutex_lock(&sc->lock);
2805 sc->vif = conf->vif;
2807 switch (conf->type) {
2808 case NL80211_IFTYPE_AP:
2809 case NL80211_IFTYPE_STATION:
2810 case NL80211_IFTYPE_ADHOC:
2811 case NL80211_IFTYPE_MESH_POINT:
2812 case NL80211_IFTYPE_MONITOR:
2813 sc->opmode = conf->type;
2820 ath5k_hw_set_lladdr(sc->ah, conf->mac_addr);
2821 ath5k_mode_setup(sc);
2825 mutex_unlock(&sc->lock);
2830 ath5k_remove_interface(struct ieee80211_hw *hw,
2831 struct ieee80211_if_init_conf *conf)
2833 struct ath5k_softc *sc = hw->priv;
2834 u8 mac[ETH_ALEN] = {};
2836 mutex_lock(&sc->lock);
2837 if (sc->vif != conf->vif)
2840 ath5k_hw_set_lladdr(sc->ah, mac);
2843 mutex_unlock(&sc->lock);
2847 * TODO: Phy disable/diversity etc
2850 ath5k_config(struct ieee80211_hw *hw, u32 changed)
2852 struct ath5k_softc *sc = hw->priv;
2853 struct ath5k_hw *ah = sc->ah;
2854 struct ieee80211_conf *conf = &hw->conf;
2857 mutex_lock(&sc->lock);
2859 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
2860 ret = ath5k_chan_set(sc, conf->channel);
2865 if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
2866 (sc->power_level != conf->power_level)) {
2867 sc->power_level = conf->power_level;
2870 ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2));
2874 * 1) Move this on config_interface and handle each case
2875 * separately eg. when we have only one STA vif, use
2876 * AR5K_ANTMODE_SINGLE_AP
2878 * 2) Allow the user to change antenna mode eg. when only
2879 * one antenna is present
2881 * 3) Allow the user to set default/tx antenna when possible
2883 * 4) Default mode should handle 90% of the cases, together
2884 * with fixed a/b and single AP modes we should be able to
2885 * handle 99%. Sectored modes are extreme cases and i still
2886 * haven't found a usage for them. If we decide to support them,
2887 * then we must allow the user to set how many tx antennas we
2890 ath5k_hw_set_antenna_mode(ah, AR5K_ANTMODE_DEFAULT);
2893 mutex_unlock(&sc->lock);
2897 static u64 ath5k_prepare_multicast(struct ieee80211_hw *hw,
2898 int mc_count, struct dev_addr_list *mclist)
2907 for (i = 0; i < mc_count; i++) {
2910 /* calculate XOR of eight 6-bit values */
2911 val = get_unaligned_le32(mclist->dmi_addr + 0);
2912 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2913 val = get_unaligned_le32(mclist->dmi_addr + 3);
2914 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2916 mfilt[pos / 32] |= (1 << (pos % 32));
2917 /* XXX: we might be able to just do this instead,
2918 * but not sure, needs testing, if we do use this we'd
2919 * neet to inform below to not reset the mcast */
2920 /* ath5k_hw_set_mcast_filterindex(ah,
2921 * mclist->dmi_addr[5]); */
2922 mclist = mclist->next;
2925 return ((u64)(mfilt[1]) << 32) | mfilt[0];
2928 #define SUPPORTED_FIF_FLAGS \
2929 FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \
2930 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
2931 FIF_BCN_PRBRESP_PROMISC
2933 * o always accept unicast, broadcast, and multicast traffic
2934 * o multicast traffic for all BSSIDs will be enabled if mac80211
2936 * o maintain current state of phy ofdm or phy cck error reception.
2937 * If the hardware detects any of these type of errors then
2938 * ath5k_hw_get_rx_filter() will pass to us the respective
2939 * hardware filters to be able to receive these type of frames.
2940 * o probe request frames are accepted only when operating in
2941 * hostap, adhoc, or monitor modes
2942 * o enable promiscuous mode according to the interface state
2944 * - when operating in adhoc mode so the 802.11 layer creates
2945 * node table entries for peers,
2946 * - when operating in station mode for collecting rssi data when
2947 * the station is otherwise quiet, or
2950 static void ath5k_configure_filter(struct ieee80211_hw *hw,
2951 unsigned int changed_flags,
2952 unsigned int *new_flags,
2955 struct ath5k_softc *sc = hw->priv;
2956 struct ath5k_hw *ah = sc->ah;
2957 u32 mfilt[2], rfilt;
2959 mutex_lock(&sc->lock);
2961 mfilt[0] = multicast;
2962 mfilt[1] = multicast >> 32;
2964 /* Only deal with supported flags */
2965 changed_flags &= SUPPORTED_FIF_FLAGS;
2966 *new_flags &= SUPPORTED_FIF_FLAGS;
2968 /* If HW detects any phy or radar errors, leave those filters on.
2969 * Also, always enable Unicast, Broadcasts and Multicast
2970 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
2971 rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
2972 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
2973 AR5K_RX_FILTER_MCAST);
2975 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
2976 if (*new_flags & FIF_PROMISC_IN_BSS) {
2977 rfilt |= AR5K_RX_FILTER_PROM;
2978 __set_bit(ATH_STAT_PROMISC, sc->status);
2980 __clear_bit(ATH_STAT_PROMISC, sc->status);
2984 /* Note, AR5K_RX_FILTER_MCAST is already enabled */
2985 if (*new_flags & FIF_ALLMULTI) {
2990 /* This is the best we can do */
2991 if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
2992 rfilt |= AR5K_RX_FILTER_PHYERR;
2994 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
2995 * and probes for any BSSID, this needs testing */
2996 if (*new_flags & FIF_BCN_PRBRESP_PROMISC)
2997 rfilt |= AR5K_RX_FILTER_BEACON | AR5K_RX_FILTER_PROBEREQ;
2999 /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
3000 * set we should only pass on control frames for this
3001 * station. This needs testing. I believe right now this
3002 * enables *all* control frames, which is OK.. but
3003 * but we should see if we can improve on granularity */
3004 if (*new_flags & FIF_CONTROL)
3005 rfilt |= AR5K_RX_FILTER_CONTROL;
3007 /* Additional settings per mode -- this is per ath5k */
3009 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
3011 switch (sc->opmode) {
3012 case NL80211_IFTYPE_MESH_POINT:
3013 case NL80211_IFTYPE_MONITOR:
3014 rfilt |= AR5K_RX_FILTER_CONTROL |
3015 AR5K_RX_FILTER_BEACON |
3016 AR5K_RX_FILTER_PROBEREQ |
3017 AR5K_RX_FILTER_PROM;
3019 case NL80211_IFTYPE_AP:
3020 case NL80211_IFTYPE_ADHOC:
3021 rfilt |= AR5K_RX_FILTER_PROBEREQ |
3022 AR5K_RX_FILTER_BEACON;
3024 case NL80211_IFTYPE_STATION:
3026 rfilt |= AR5K_RX_FILTER_BEACON;
3032 ath5k_hw_set_rx_filter(ah, rfilt);
3034 /* Set multicast bits */
3035 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
3036 /* Set the cached hw filter flags, this will alter actually
3038 sc->filter_flags = rfilt;
3040 mutex_unlock(&sc->lock);
3044 ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
3045 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
3046 struct ieee80211_key_conf *key)
3048 struct ath5k_softc *sc = hw->priv;
3051 if (modparam_nohwcrypt)
3054 if (sc->opmode == NL80211_IFTYPE_AP)
3062 if (sc->ah->ah_aes_support)
3071 mutex_lock(&sc->lock);
3075 ret = ath5k_hw_set_key(sc->ah, key->keyidx, key,
3076 sta ? sta->addr : NULL);
3078 ATH5K_ERR(sc, "can't set the key\n");
3081 __set_bit(key->keyidx, sc->keymap);
3082 key->hw_key_idx = key->keyidx;
3083 key->flags |= (IEEE80211_KEY_FLAG_GENERATE_IV |
3084 IEEE80211_KEY_FLAG_GENERATE_MMIC);
3087 ath5k_hw_reset_key(sc->ah, key->keyidx);
3088 __clear_bit(key->keyidx, sc->keymap);
3097 mutex_unlock(&sc->lock);
3102 ath5k_get_stats(struct ieee80211_hw *hw,
3103 struct ieee80211_low_level_stats *stats)
3105 struct ath5k_softc *sc = hw->priv;
3106 struct ath5k_hw *ah = sc->ah;
3109 ath5k_hw_update_mib_counters(ah, &sc->ll_stats);
3111 memcpy(stats, &sc->ll_stats, sizeof(sc->ll_stats));
3117 ath5k_get_tx_stats(struct ieee80211_hw *hw,
3118 struct ieee80211_tx_queue_stats *stats)
3120 struct ath5k_softc *sc = hw->priv;
3122 memcpy(stats, &sc->tx_stats, sizeof(sc->tx_stats));
3128 ath5k_get_tsf(struct ieee80211_hw *hw)
3130 struct ath5k_softc *sc = hw->priv;
3132 return ath5k_hw_get_tsf64(sc->ah);
3136 ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
3138 struct ath5k_softc *sc = hw->priv;
3140 ath5k_hw_set_tsf64(sc->ah, tsf);
3144 ath5k_reset_tsf(struct ieee80211_hw *hw)
3146 struct ath5k_softc *sc = hw->priv;
3149 * in IBSS mode we need to update the beacon timers too.
3150 * this will also reset the TSF if we call it with 0
3152 if (sc->opmode == NL80211_IFTYPE_ADHOC)
3153 ath5k_beacon_update_timers(sc, 0);
3155 ath5k_hw_reset_tsf(sc->ah);
3159 * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
3160 * this is called only once at config_bss time, for AP we do it every
3161 * SWBA interrupt so that the TIM will reflect buffered frames.
3163 * Called with the beacon lock.
3166 ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)