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/version.h>
44 #include <linux/module.h>
45 #include <linux/delay.h>
47 #include <linux/netdevice.h>
48 #include <linux/cache.h>
49 #include <linux/pci.h>
50 #include <linux/ethtool.h>
51 #include <linux/uaccess.h>
53 #include <net/ieee80211_radiotap.h>
55 #include <asm/unaligned.h>
61 /* unaligned little endian access */
62 #define LE_READ_2(_p) (le16_to_cpu(get_unaligned((__le16 *)(_p))))
63 #define LE_READ_4(_p) (le32_to_cpu(get_unaligned((__le32 *)(_p))))
70 static int ath5k_calinterval
= 10; /* Calibrate PHY every 10 secs (TODO: Fixme) */
78 MODULE_AUTHOR("Jiri Slaby");
79 MODULE_AUTHOR("Nick Kossifidis");
80 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
81 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
82 MODULE_LICENSE("Dual BSD/GPL");
83 MODULE_VERSION("0.5.0 (EXPERIMENTAL)");
87 static struct pci_device_id ath5k_pci_id_table
[] __devinitdata
= {
88 { PCI_VDEVICE(ATHEROS
, 0x0207), .driver_data
= AR5K_AR5210
}, /* 5210 early */
89 { PCI_VDEVICE(ATHEROS
, 0x0007), .driver_data
= AR5K_AR5210
}, /* 5210 */
90 { PCI_VDEVICE(ATHEROS
, 0x0011), .driver_data
= AR5K_AR5211
}, /* 5311 - this is on AHB bus !*/
91 { PCI_VDEVICE(ATHEROS
, 0x0012), .driver_data
= AR5K_AR5211
}, /* 5211 */
92 { PCI_VDEVICE(ATHEROS
, 0x0013), .driver_data
= AR5K_AR5212
}, /* 5212 */
93 { PCI_VDEVICE(3COM_2
, 0x0013), .driver_data
= AR5K_AR5212
}, /* 3com 5212 */
94 { PCI_VDEVICE(3COM
, 0x0013), .driver_data
= AR5K_AR5212
}, /* 3com 3CRDAG675 5212 */
95 { PCI_VDEVICE(ATHEROS
, 0x1014), .driver_data
= AR5K_AR5212
}, /* IBM minipci 5212 */
96 { PCI_VDEVICE(ATHEROS
, 0x0014), .driver_data
= AR5K_AR5212
}, /* 5212 combatible */
97 { PCI_VDEVICE(ATHEROS
, 0x0015), .driver_data
= AR5K_AR5212
}, /* 5212 combatible */
98 { PCI_VDEVICE(ATHEROS
, 0x0016), .driver_data
= AR5K_AR5212
}, /* 5212 combatible */
99 { PCI_VDEVICE(ATHEROS
, 0x0017), .driver_data
= AR5K_AR5212
}, /* 5212 combatible */
100 { PCI_VDEVICE(ATHEROS
, 0x0018), .driver_data
= AR5K_AR5212
}, /* 5212 combatible */
101 { PCI_VDEVICE(ATHEROS
, 0x0019), .driver_data
= AR5K_AR5212
}, /* 5212 combatible */
102 { PCI_VDEVICE(ATHEROS
, 0x001a), .driver_data
= AR5K_AR5212
}, /* 2413 Griffin-lite */
103 { PCI_VDEVICE(ATHEROS
, 0x001b), .driver_data
= AR5K_AR5212
}, /* 5413 Eagle */
104 { PCI_VDEVICE(ATHEROS
, 0x001c), .driver_data
= AR5K_AR5212
}, /* 5424 Condor (PCI-E)*/
105 { PCI_VDEVICE(ATHEROS
, 0x0023), .driver_data
= AR5K_AR5212
}, /* 5416 */
106 { PCI_VDEVICE(ATHEROS
, 0x0024), .driver_data
= AR5K_AR5212
}, /* 5418 */
109 MODULE_DEVICE_TABLE(pci
, ath5k_pci_id_table
);
112 static struct ath5k_srev_name srev_names
[] = {
113 { "5210", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5210
},
114 { "5311", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5311
},
115 { "5311A", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5311A
},
116 { "5311B", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5311B
},
117 { "5211", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5211
},
118 { "5212", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5212
},
119 { "5213", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5213
},
120 { "5213A", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5213A
},
121 { "2413", AR5K_VERSION_VER
, AR5K_SREV_VER_AR2413
},
122 { "2414", AR5K_VERSION_VER
, AR5K_SREV_VER_AR2414
},
123 { "2424", AR5K_VERSION_VER
, AR5K_SREV_VER_AR2424
},
124 { "5424", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5424
},
125 { "5413", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5413
},
126 { "5414", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5414
},
127 { "5416", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5416
},
128 { "5418", AR5K_VERSION_VER
, AR5K_SREV_VER_AR5418
},
129 { "2425", AR5K_VERSION_VER
, AR5K_SREV_VER_AR2425
},
130 { "xxxxx", AR5K_VERSION_VER
, AR5K_SREV_UNKNOWN
},
131 { "5110", AR5K_VERSION_RAD
, AR5K_SREV_RAD_5110
},
132 { "5111", AR5K_VERSION_RAD
, AR5K_SREV_RAD_5111
},
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 { "2112", AR5K_VERSION_RAD
, AR5K_SREV_RAD_2112
},
137 { "2112A", AR5K_VERSION_RAD
, AR5K_SREV_RAD_2112A
},
138 { "SChip", AR5K_VERSION_RAD
, AR5K_SREV_RAD_SC0
},
139 { "SChip", AR5K_VERSION_RAD
, AR5K_SREV_RAD_SC1
},
140 { "SChip", AR5K_VERSION_RAD
, AR5K_SREV_RAD_SC2
},
141 { "5133", AR5K_VERSION_RAD
, AR5K_SREV_RAD_5133
},
142 { "xxxxx", AR5K_VERSION_RAD
, AR5K_SREV_UNKNOWN
},
146 * Prototypes - PCI stack related functions
148 static int __devinit
ath5k_pci_probe(struct pci_dev
*pdev
,
149 const struct pci_device_id
*id
);
150 static void __devexit
ath5k_pci_remove(struct pci_dev
*pdev
);
152 static int ath5k_pci_suspend(struct pci_dev
*pdev
,
154 static int ath5k_pci_resume(struct pci_dev
*pdev
);
156 #define ath5k_pci_suspend NULL
157 #define ath5k_pci_resume NULL
158 #endif /* CONFIG_PM */
160 static struct pci_driver ath5k_pci_driver
= {
162 .id_table
= ath5k_pci_id_table
,
163 .probe
= ath5k_pci_probe
,
164 .remove
= __devexit_p(ath5k_pci_remove
),
165 .suspend
= ath5k_pci_suspend
,
166 .resume
= ath5k_pci_resume
,
172 * Prototypes - MAC 802.11 stack related functions
174 static int ath5k_tx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
175 struct ieee80211_tx_control
*ctl
);
176 static int ath5k_reset(struct ieee80211_hw
*hw
);
177 static int ath5k_start(struct ieee80211_hw
*hw
);
178 static void ath5k_stop(struct ieee80211_hw
*hw
);
179 static int ath5k_add_interface(struct ieee80211_hw
*hw
,
180 struct ieee80211_if_init_conf
*conf
);
181 static void ath5k_remove_interface(struct ieee80211_hw
*hw
,
182 struct ieee80211_if_init_conf
*conf
);
183 static int ath5k_config(struct ieee80211_hw
*hw
,
184 struct ieee80211_conf
*conf
);
185 static int ath5k_config_interface(struct ieee80211_hw
*hw
,
186 struct ieee80211_vif
*vif
,
187 struct ieee80211_if_conf
*conf
);
188 static void ath5k_configure_filter(struct ieee80211_hw
*hw
,
189 unsigned int changed_flags
,
190 unsigned int *new_flags
,
191 int mc_count
, struct dev_mc_list
*mclist
);
192 static int ath5k_set_key(struct ieee80211_hw
*hw
,
193 enum set_key_cmd cmd
,
194 const u8
*local_addr
, const u8
*addr
,
195 struct ieee80211_key_conf
*key
);
196 static int ath5k_get_stats(struct ieee80211_hw
*hw
,
197 struct ieee80211_low_level_stats
*stats
);
198 static int ath5k_get_tx_stats(struct ieee80211_hw
*hw
,
199 struct ieee80211_tx_queue_stats
*stats
);
200 static u64
ath5k_get_tsf(struct ieee80211_hw
*hw
);
201 static void ath5k_reset_tsf(struct ieee80211_hw
*hw
);
202 static int ath5k_beacon_update(struct ieee80211_hw
*hw
,
204 struct ieee80211_tx_control
*ctl
);
206 static struct ieee80211_ops ath5k_hw_ops
= {
208 .start
= ath5k_start
,
210 .add_interface
= ath5k_add_interface
,
211 .remove_interface
= ath5k_remove_interface
,
212 .config
= ath5k_config
,
213 .config_interface
= ath5k_config_interface
,
214 .configure_filter
= ath5k_configure_filter
,
215 .set_key
= ath5k_set_key
,
216 .get_stats
= ath5k_get_stats
,
218 .get_tx_stats
= ath5k_get_tx_stats
,
219 .get_tsf
= ath5k_get_tsf
,
220 .reset_tsf
= ath5k_reset_tsf
,
221 .beacon_update
= ath5k_beacon_update
,
225 * Prototypes - Internal functions
228 static int ath5k_attach(struct pci_dev
*pdev
,
229 struct ieee80211_hw
*hw
);
230 static void ath5k_detach(struct pci_dev
*pdev
,
231 struct ieee80211_hw
*hw
);
232 /* Channel/mode setup */
233 static inline short ath5k_ieee2mhz(short chan
);
234 static unsigned int ath5k_copy_rates(struct ieee80211_rate
*rates
,
235 const struct ath5k_rate_table
*rt
,
237 static unsigned int ath5k_copy_channels(struct ath5k_hw
*ah
,
238 struct ieee80211_channel
*channels
,
241 static int ath5k_getchannels(struct ieee80211_hw
*hw
);
242 static int ath5k_chan_set(struct ath5k_softc
*sc
,
243 struct ieee80211_channel
*chan
);
244 static void ath5k_setcurmode(struct ath5k_softc
*sc
,
246 static void ath5k_mode_setup(struct ath5k_softc
*sc
);
247 static void ath5k_set_total_hw_rates(struct ath5k_softc
*sc
);
249 /* Descriptor setup */
250 static int ath5k_desc_alloc(struct ath5k_softc
*sc
,
251 struct pci_dev
*pdev
);
252 static void ath5k_desc_free(struct ath5k_softc
*sc
,
253 struct pci_dev
*pdev
);
255 static int ath5k_rxbuf_setup(struct ath5k_softc
*sc
,
256 struct ath5k_buf
*bf
);
257 static int ath5k_txbuf_setup(struct ath5k_softc
*sc
,
258 struct ath5k_buf
*bf
,
259 struct ieee80211_tx_control
*ctl
);
261 static inline void ath5k_txbuf_free(struct ath5k_softc
*sc
,
262 struct ath5k_buf
*bf
)
267 pci_unmap_single(sc
->pdev
, bf
->skbaddr
, bf
->skb
->len
,
269 dev_kfree_skb(bf
->skb
);
274 static struct ath5k_txq
*ath5k_txq_setup(struct ath5k_softc
*sc
,
275 int qtype
, int subtype
);
276 static int ath5k_beaconq_setup(struct ath5k_hw
*ah
);
277 static int ath5k_beaconq_config(struct ath5k_softc
*sc
);
278 static void ath5k_txq_drainq(struct ath5k_softc
*sc
,
279 struct ath5k_txq
*txq
);
280 static void ath5k_txq_cleanup(struct ath5k_softc
*sc
);
281 static void ath5k_txq_release(struct ath5k_softc
*sc
);
283 static int ath5k_rx_start(struct ath5k_softc
*sc
);
284 static void ath5k_rx_stop(struct ath5k_softc
*sc
);
285 static unsigned int ath5k_rx_decrypted(struct ath5k_softc
*sc
,
286 struct ath5k_desc
*ds
,
288 struct ath5k_rx_status
*rs
);
289 static void ath5k_tasklet_rx(unsigned long data
);
291 static void ath5k_tx_processq(struct ath5k_softc
*sc
,
292 struct ath5k_txq
*txq
);
293 static void ath5k_tasklet_tx(unsigned long data
);
294 /* Beacon handling */
295 static int ath5k_beacon_setup(struct ath5k_softc
*sc
,
296 struct ath5k_buf
*bf
,
297 struct ieee80211_tx_control
*ctl
);
298 static void ath5k_beacon_send(struct ath5k_softc
*sc
);
299 static void ath5k_beacon_config(struct ath5k_softc
*sc
);
300 static void ath5k_beacon_update_timers(struct ath5k_softc
*sc
, u64 bc_tsf
);
302 static inline u64
ath5k_extend_tsf(struct ath5k_hw
*ah
, u32 rstamp
)
304 u64 tsf
= ath5k_hw_get_tsf64(ah
);
306 if ((tsf
& 0x7fff) < rstamp
)
309 return (tsf
& ~0x7fff) | rstamp
;
312 /* Interrupt handling */
313 static int ath5k_init(struct ath5k_softc
*sc
);
314 static int ath5k_stop_locked(struct ath5k_softc
*sc
);
315 static int ath5k_stop_hw(struct ath5k_softc
*sc
);
316 static irqreturn_t
ath5k_intr(int irq
, void *dev_id
);
317 static void ath5k_tasklet_reset(unsigned long data
);
319 static void ath5k_calibrate(unsigned long data
);
321 static void ath5k_led_off(unsigned long data
);
322 static void ath5k_led_blink(struct ath5k_softc
*sc
,
325 static void ath5k_led_event(struct ath5k_softc
*sc
,
330 * Module init/exit functions
339 ret
= pci_register_driver(&ath5k_pci_driver
);
341 printk(KERN_ERR
"ath5k_pci: can't register pci driver\n");
351 pci_unregister_driver(&ath5k_pci_driver
);
353 ath5k_debug_finish();
356 module_init(init_ath5k_pci
);
357 module_exit(exit_ath5k_pci
);
360 /********************\
361 * PCI Initialization *
362 \********************/
365 ath5k_chip_name(enum ath5k_srev_type type
, u_int16_t val
)
367 const char *name
= "xxxxx";
370 for (i
= 0; i
< ARRAY_SIZE(srev_names
); i
++) {
371 if (srev_names
[i
].sr_type
!= type
)
373 if ((val
& 0xff) < srev_names
[i
+ 1].sr_val
) {
374 name
= srev_names
[i
].sr_name
;
383 ath5k_pci_probe(struct pci_dev
*pdev
,
384 const struct pci_device_id
*id
)
387 struct ath5k_softc
*sc
;
388 struct ieee80211_hw
*hw
;
392 ret
= pci_enable_device(pdev
);
394 dev_err(&pdev
->dev
, "can't enable device\n");
398 /* XXX 32-bit addressing only */
399 ret
= pci_set_dma_mask(pdev
, DMA_32BIT_MASK
);
401 dev_err(&pdev
->dev
, "32-bit DMA not available\n");
406 * Cache line size is used to size and align various
407 * structures used to communicate with the hardware.
409 pci_read_config_byte(pdev
, PCI_CACHE_LINE_SIZE
, &csz
);
412 * Linux 2.4.18 (at least) writes the cache line size
413 * register as a 16-bit wide register which is wrong.
414 * We must have this setup properly for rx buffer
415 * DMA to work so force a reasonable value here if it
418 csz
= L1_CACHE_BYTES
/ sizeof(u32
);
419 pci_write_config_byte(pdev
, PCI_CACHE_LINE_SIZE
, csz
);
422 * The default setting of latency timer yields poor results,
423 * set it to the value used by other systems. It may be worth
424 * tweaking this setting more.
426 pci_write_config_byte(pdev
, PCI_LATENCY_TIMER
, 0xa8);
428 /* Enable bus mastering */
429 pci_set_master(pdev
);
432 * Disable the RETRY_TIMEOUT register (0x41) to keep
433 * PCI Tx retries from interfering with C3 CPU state.
435 pci_write_config_byte(pdev
, 0x41, 0);
437 ret
= pci_request_region(pdev
, 0, "ath5k");
439 dev_err(&pdev
->dev
, "cannot reserve PCI memory region\n");
443 mem
= pci_iomap(pdev
, 0, 0);
445 dev_err(&pdev
->dev
, "cannot remap PCI memory region\n") ;
451 * Allocate hw (mac80211 main struct)
452 * and hw->priv (driver private data)
454 hw
= ieee80211_alloc_hw(sizeof(*sc
), &ath5k_hw_ops
);
456 dev_err(&pdev
->dev
, "cannot allocate ieee80211_hw\n");
461 dev_info(&pdev
->dev
, "registered as '%s'\n", wiphy_name(hw
->wiphy
));
463 /* Initialize driver private data */
464 SET_IEEE80211_DEV(hw
, &pdev
->dev
);
465 hw
->flags
= IEEE80211_HW_RX_INCLUDES_FCS
;
466 hw
->extra_tx_headroom
= 2;
467 hw
->channel_change_time
= 5000;
468 /* these names are misleading */
469 hw
->max_rssi
= -110; /* signal in dBm */
470 hw
->max_noise
= -110; /* noise in dBm */
471 hw
->max_signal
= 100; /* we will provide a percentage based on rssi */
476 ath5k_debug_init_device(sc
);
479 * Mark the device as detached to avoid processing
480 * interrupts until setup is complete.
482 __set_bit(ATH_STAT_INVALID
, sc
->status
);
484 sc
->iobase
= mem
; /* So we can unmap it on detach */
485 sc
->cachelsz
= csz
* sizeof(u32
); /* convert to bytes */
486 sc
->opmode
= IEEE80211_IF_TYPE_STA
;
487 mutex_init(&sc
->lock
);
488 spin_lock_init(&sc
->rxbuflock
);
489 spin_lock_init(&sc
->txbuflock
);
491 /* Set private data */
492 pci_set_drvdata(pdev
, hw
);
494 /* Enable msi for devices that support it */
495 pci_enable_msi(pdev
);
497 /* Setup interrupt handler */
498 ret
= request_irq(pdev
->irq
, ath5k_intr
, IRQF_SHARED
, "ath", sc
);
500 ATH5K_ERR(sc
, "request_irq failed\n");
504 /* Initialize device */
505 sc
->ah
= ath5k_hw_attach(sc
, id
->driver_data
);
506 if (IS_ERR(sc
->ah
)) {
507 ret
= PTR_ERR(sc
->ah
);
511 /* Finish private driver data initialization */
512 ret
= ath5k_attach(pdev
, hw
);
516 ATH5K_INFO(sc
, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
517 ath5k_chip_name(AR5K_VERSION_VER
,sc
->ah
->ah_mac_srev
),
519 sc
->ah
->ah_phy_revision
);
521 if (!sc
->ah
->ah_single_chip
) {
522 /* Single chip radio (!RF5111) */
523 if (sc
->ah
->ah_radio_5ghz_revision
&&
524 !sc
->ah
->ah_radio_2ghz_revision
) {
525 /* No 5GHz support -> report 2GHz radio */
526 if (!test_bit(AR5K_MODE_11A
,
527 sc
->ah
->ah_capabilities
.cap_mode
)) {
528 ATH5K_INFO(sc
, "RF%s 2GHz radio found (0x%x)\n",
529 ath5k_chip_name(AR5K_VERSION_RAD
,
530 sc
->ah
->ah_radio_5ghz_revision
),
531 sc
->ah
->ah_radio_5ghz_revision
);
532 /* No 2GHz support (5110 and some
533 * 5Ghz only cards) -> report 5Ghz radio */
534 } else if (!test_bit(AR5K_MODE_11B
,
535 sc
->ah
->ah_capabilities
.cap_mode
)) {
536 ATH5K_INFO(sc
, "RF%s 5GHz radio found (0x%x)\n",
537 ath5k_chip_name(AR5K_VERSION_RAD
,
538 sc
->ah
->ah_radio_5ghz_revision
),
539 sc
->ah
->ah_radio_5ghz_revision
);
540 /* Multiband radio */
542 ATH5K_INFO(sc
, "RF%s multiband radio found"
544 ath5k_chip_name(AR5K_VERSION_RAD
,
545 sc
->ah
->ah_radio_5ghz_revision
),
546 sc
->ah
->ah_radio_5ghz_revision
);
549 /* Multi chip radio (RF5111 - RF2111) ->
550 * report both 2GHz/5GHz radios */
551 else if (sc
->ah
->ah_radio_5ghz_revision
&&
552 sc
->ah
->ah_radio_2ghz_revision
){
553 ATH5K_INFO(sc
, "RF%s 5GHz radio found (0x%x)\n",
554 ath5k_chip_name(AR5K_VERSION_RAD
,
555 sc
->ah
->ah_radio_5ghz_revision
),
556 sc
->ah
->ah_radio_5ghz_revision
);
557 ATH5K_INFO(sc
, "RF%s 2GHz radio found (0x%x)\n",
558 ath5k_chip_name(AR5K_VERSION_RAD
,
559 sc
->ah
->ah_radio_2ghz_revision
),
560 sc
->ah
->ah_radio_2ghz_revision
);
565 /* ready to process interrupts */
566 __clear_bit(ATH_STAT_INVALID
, sc
->status
);
570 ath5k_hw_detach(sc
->ah
);
572 free_irq(pdev
->irq
, sc
);
574 pci_disable_msi(pdev
);
575 ieee80211_free_hw(hw
);
577 pci_iounmap(pdev
, mem
);
579 pci_release_region(pdev
, 0);
581 pci_disable_device(pdev
);
586 static void __devexit
587 ath5k_pci_remove(struct pci_dev
*pdev
)
589 struct ieee80211_hw
*hw
= pci_get_drvdata(pdev
);
590 struct ath5k_softc
*sc
= hw
->priv
;
592 ath5k_debug_finish_device(sc
);
593 ath5k_detach(pdev
, hw
);
594 ath5k_hw_detach(sc
->ah
);
595 free_irq(pdev
->irq
, sc
);
596 pci_disable_msi(pdev
);
597 pci_iounmap(pdev
, sc
->iobase
);
598 pci_release_region(pdev
, 0);
599 pci_disable_device(pdev
);
600 ieee80211_free_hw(hw
);
605 ath5k_pci_suspend(struct pci_dev
*pdev
, pm_message_t state
)
607 struct ieee80211_hw
*hw
= pci_get_drvdata(pdev
);
608 struct ath5k_softc
*sc
= hw
->priv
;
610 if (test_bit(ATH_STAT_LEDSOFT
, sc
->status
))
611 ath5k_hw_set_gpio(sc
->ah
, sc
->led_pin
, 1);
614 pci_save_state(pdev
);
615 pci_disable_device(pdev
);
616 pci_set_power_state(pdev
, PCI_D3hot
);
622 ath5k_pci_resume(struct pci_dev
*pdev
)
624 struct ieee80211_hw
*hw
= pci_get_drvdata(pdev
);
625 struct ath5k_softc
*sc
= hw
->priv
;
626 struct ath5k_hw
*ah
= sc
->ah
;
629 err
= pci_set_power_state(pdev
, PCI_D0
);
633 err
= pci_enable_device(pdev
);
637 pci_restore_state(pdev
);
639 * Suspend/Resume resets the PCI configuration space, so we have to
640 * re-disable the RETRY_TIMEOUT register (0x41) to keep
641 * PCI Tx retries from interfering with C3 CPU state
643 pci_write_config_byte(pdev
, 0x41, 0);
646 if (test_bit(ATH_STAT_LEDSOFT
, sc
->status
)) {
647 ath5k_hw_set_gpio_output(ah
, sc
->led_pin
);
648 ath5k_hw_set_gpio(ah
, sc
->led_pin
, 0);
652 * Reset the key cache since some parts do not
653 * reset the contents on initial power up or resume.
655 * FIXME: This may need to be revisited when mac80211 becomes
656 * aware of suspend/resume.
658 for (i
= 0; i
< AR5K_KEYTABLE_SIZE
; i
++)
659 ath5k_hw_reset_key(ah
, i
);
663 #endif /* CONFIG_PM */
667 /***********************\
668 * Driver Initialization *
669 \***********************/
672 ath5k_attach(struct pci_dev
*pdev
, struct ieee80211_hw
*hw
)
674 struct ath5k_softc
*sc
= hw
->priv
;
675 struct ath5k_hw
*ah
= sc
->ah
;
680 ATH5K_DBG(sc
, ATH5K_DEBUG_ANY
, "devid 0x%x\n", pdev
->device
);
683 * Check if the MAC has multi-rate retry support.
684 * We do this by trying to setup a fake extended
685 * descriptor. MAC's that don't have support will
686 * return false w/o doing anything. MAC's that do
687 * support it will return true w/o doing anything.
689 ret
= ah
->ah_setup_xtx_desc(ah
, NULL
, 0, 0, 0, 0, 0, 0);
693 __set_bit(ATH_STAT_MRRETRY
, sc
->status
);
696 * Reset the key cache since some parts do not
697 * reset the contents on initial power up.
699 for (i
= 0; i
< AR5K_KEYTABLE_SIZE
; i
++)
700 ath5k_hw_reset_key(ah
, i
);
703 * Collect the channel list. The 802.11 layer
704 * is resposible for filtering this list based
705 * on settings like the phy mode and regulatory
706 * domain restrictions.
708 ret
= ath5k_getchannels(hw
);
710 ATH5K_ERR(sc
, "can't get channels\n");
714 /* Set *_rates so we can map hw rate index */
715 ath5k_set_total_hw_rates(sc
);
717 /* NB: setup here so ath5k_rate_update is happy */
718 if (test_bit(AR5K_MODE_11A
, ah
->ah_modes
))
719 ath5k_setcurmode(sc
, AR5K_MODE_11A
);
721 ath5k_setcurmode(sc
, AR5K_MODE_11B
);
724 * Allocate tx+rx descriptors and populate the lists.
726 ret
= ath5k_desc_alloc(sc
, pdev
);
728 ATH5K_ERR(sc
, "can't allocate descriptors\n");
733 * Allocate hardware transmit queues: one queue for
734 * beacon frames and one data queue for each QoS
735 * priority. Note that hw functions handle reseting
736 * these queues at the needed time.
738 ret
= ath5k_beaconq_setup(ah
);
740 ATH5K_ERR(sc
, "can't setup a beacon xmit queue\n");
745 sc
->txq
= ath5k_txq_setup(sc
, AR5K_TX_QUEUE_DATA
, AR5K_WME_AC_BK
);
746 if (IS_ERR(sc
->txq
)) {
747 ATH5K_ERR(sc
, "can't setup xmit queue\n");
748 ret
= PTR_ERR(sc
->txq
);
752 tasklet_init(&sc
->rxtq
, ath5k_tasklet_rx
, (unsigned long)sc
);
753 tasklet_init(&sc
->txtq
, ath5k_tasklet_tx
, (unsigned long)sc
);
754 tasklet_init(&sc
->restq
, ath5k_tasklet_reset
, (unsigned long)sc
);
755 setup_timer(&sc
->calib_tim
, ath5k_calibrate
, (unsigned long)sc
);
756 setup_timer(&sc
->led_tim
, ath5k_led_off
, (unsigned long)sc
);
758 sc
->led_on
= 0; /* low true */
760 * Auto-enable soft led processing for IBM cards and for
761 * 5211 minipci cards.
763 if (pdev
->device
== PCI_DEVICE_ID_ATHEROS_AR5212_IBM
||
764 pdev
->device
== PCI_DEVICE_ID_ATHEROS_AR5211
) {
765 __set_bit(ATH_STAT_LEDSOFT
, sc
->status
);
768 /* Enable softled on PIN1 on HP Compaq nc6xx, nc4000 & nx5000 laptops */
769 if (pdev
->subsystem_vendor
== PCI_VENDOR_ID_COMPAQ
) {
770 __set_bit(ATH_STAT_LEDSOFT
, sc
->status
);
773 if (test_bit(ATH_STAT_LEDSOFT
, sc
->status
)) {
774 ath5k_hw_set_gpio_output(ah
, sc
->led_pin
);
775 ath5k_hw_set_gpio(ah
, sc
->led_pin
, !sc
->led_on
);
778 ath5k_hw_get_lladdr(ah
, mac
);
779 SET_IEEE80211_PERM_ADDR(hw
, mac
);
780 /* All MAC address bits matter for ACKs */
781 memset(sc
->bssidmask
, 0xff, ETH_ALEN
);
782 ath5k_hw_set_bssid_mask(sc
->ah
, sc
->bssidmask
);
784 ret
= ieee80211_register_hw(hw
);
786 ATH5K_ERR(sc
, "can't register ieee80211 hw\n");
792 ath5k_txq_release(sc
);
794 ath5k_hw_release_tx_queue(ah
, sc
->bhalq
);
796 ath5k_desc_free(sc
, pdev
);
802 ath5k_detach(struct pci_dev
*pdev
, struct ieee80211_hw
*hw
)
804 struct ath5k_softc
*sc
= hw
->priv
;
807 * NB: the order of these is important:
808 * o call the 802.11 layer before detaching ath5k_hw to
809 * insure callbacks into the driver to delete global
810 * key cache entries can be handled
811 * o reclaim the tx queue data structures after calling
812 * the 802.11 layer as we'll get called back to reclaim
813 * node state and potentially want to use them
814 * o to cleanup the tx queues the hal is called, so detach
816 * XXX: ??? detach ath5k_hw ???
817 * Other than that, it's straightforward...
819 ieee80211_unregister_hw(hw
);
820 ath5k_desc_free(sc
, pdev
);
821 ath5k_txq_release(sc
);
822 ath5k_hw_release_tx_queue(sc
->ah
, sc
->bhalq
);
825 * NB: can't reclaim these until after ieee80211_ifdetach
826 * returns because we'll get called back to reclaim node
827 * state and potentially want to use them.
834 /********************\
835 * Channel/mode setup *
836 \********************/
839 * Convert IEEE channel number to MHz frequency.
842 ath5k_ieee2mhz(short chan
)
844 if (chan
<= 14 || chan
>= 27)
845 return ieee80211chan2mhz(chan
);
847 return 2212 + chan
* 20;
851 ath5k_copy_rates(struct ieee80211_rate
*rates
,
852 const struct ath5k_rate_table
*rt
,
855 unsigned int i
, count
;
860 for (i
= 0, count
= 0; i
< rt
->rate_count
&& max
> 0; i
++) {
861 rates
[count
].bitrate
= rt
->rates
[i
].rate_kbps
/ 100;
862 rates
[count
].hw_value
= rt
->rates
[i
].rate_code
;
863 rates
[count
].flags
= rt
->rates
[i
].modulation
;
872 ath5k_copy_channels(struct ath5k_hw
*ah
,
873 struct ieee80211_channel
*channels
,
877 unsigned int i
, count
, size
, chfreq
, freq
, ch
;
879 if (!test_bit(mode
, ah
->ah_modes
))
884 case AR5K_MODE_11A_TURBO
:
885 /* 1..220, but 2GHz frequencies are filtered by check_channel */
887 chfreq
= CHANNEL_5GHZ
;
891 case AR5K_MODE_11G_TURBO
:
893 chfreq
= CHANNEL_2GHZ
;
896 ATH5K_WARN(ah
->ah_sc
, "bad mode, not copying channels\n");
900 for (i
= 0, count
= 0; i
< size
&& max
> 0; i
++) {
902 freq
= ath5k_ieee2mhz(ch
);
904 /* Check if channel is supported by the chipset */
905 if (!ath5k_channel_ok(ah
, freq
, chfreq
))
908 /* Write channel info and increment counter */
909 channels
[count
].center_freq
= freq
;
910 channels
[count
].band
= (chfreq
== CHANNEL_2GHZ
) ?
911 IEEE80211_BAND_2GHZ
: IEEE80211_BAND_5GHZ
;
915 channels
[count
].hw_value
= chfreq
| CHANNEL_OFDM
;
917 case AR5K_MODE_11A_TURBO
:
918 case AR5K_MODE_11G_TURBO
:
919 channels
[count
].hw_value
= chfreq
|
920 CHANNEL_OFDM
| CHANNEL_TURBO
;
923 channels
[count
].hw_value
= CHANNEL_B
;
934 ath5k_getchannels(struct ieee80211_hw
*hw
)
936 struct ath5k_softc
*sc
= hw
->priv
;
937 struct ath5k_hw
*ah
= sc
->ah
;
938 struct ieee80211_supported_band
*sbands
= sc
->sbands
;
939 const struct ath5k_rate_table
*hw_rates
;
940 unsigned int max_r
, max_c
, count_r
, count_c
;
941 int mode2g
= AR5K_MODE_11G
;
943 BUILD_BUG_ON(ARRAY_SIZE(sc
->sbands
) < IEEE80211_NUM_BANDS
);
945 max_r
= ARRAY_SIZE(sc
->rates
);
946 max_c
= ARRAY_SIZE(sc
->channels
);
947 count_r
= count_c
= 0;
950 if (!test_bit(AR5K_MODE_11G
, sc
->ah
->ah_capabilities
.cap_mode
)) {
951 mode2g
= AR5K_MODE_11B
;
952 if (!test_bit(AR5K_MODE_11B
,
953 sc
->ah
->ah_capabilities
.cap_mode
))
958 struct ieee80211_supported_band
*sband
=
959 &sbands
[IEEE80211_BAND_2GHZ
];
961 sband
->bitrates
= sc
->rates
;
962 sband
->channels
= sc
->channels
;
964 sband
->band
= IEEE80211_BAND_2GHZ
;
965 sband
->n_channels
= ath5k_copy_channels(ah
, sband
->channels
,
968 hw_rates
= ath5k_hw_get_rate_table(ah
, mode2g
);
969 sband
->n_bitrates
= ath5k_copy_rates(sband
->bitrates
,
972 count_c
= sband
->n_channels
;
973 count_r
= sband
->n_bitrates
;
975 hw
->wiphy
->bands
[IEEE80211_BAND_2GHZ
] = sband
;
984 if (test_bit(AR5K_MODE_11A
, sc
->ah
->ah_capabilities
.cap_mode
)) {
985 struct ieee80211_supported_band
*sband
=
986 &sbands
[IEEE80211_BAND_5GHZ
];
988 sband
->bitrates
= &sc
->rates
[count_r
];
989 sband
->channels
= &sc
->channels
[count_c
];
991 sband
->band
= IEEE80211_BAND_5GHZ
;
992 sband
->n_channels
= ath5k_copy_channels(ah
, sband
->channels
,
993 AR5K_MODE_11A
, max_c
);
995 hw_rates
= ath5k_hw_get_rate_table(ah
, AR5K_MODE_11A
);
996 sband
->n_bitrates
= ath5k_copy_rates(sband
->bitrates
,
999 hw
->wiphy
->bands
[IEEE80211_BAND_5GHZ
] = sband
;
1002 ath5k_debug_dump_bands(sc
);
1008 * Set/change channels. If the channel is really being changed,
1009 * it's done by reseting the chip. To accomplish this we must
1010 * first cleanup any pending DMA, then restart stuff after a la
1014 ath5k_chan_set(struct ath5k_softc
*sc
, struct ieee80211_channel
*chan
)
1016 struct ath5k_hw
*ah
= sc
->ah
;
1019 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "(%u MHz) -> (%u MHz)\n",
1020 sc
->curchan
->center_freq
, chan
->center_freq
);
1022 if (chan
->center_freq
!= sc
->curchan
->center_freq
||
1023 chan
->hw_value
!= sc
->curchan
->hw_value
) {
1026 sc
->curband
= &sc
->sbands
[chan
->band
];
1029 * To switch channels clear any pending DMA operations;
1030 * wait long enough for the RX fifo to drain, reset the
1031 * hardware at the new frequency, and then re-enable
1032 * the relevant bits of the h/w.
1034 ath5k_hw_set_intr(ah
, 0); /* disable interrupts */
1035 ath5k_txq_cleanup(sc
); /* clear pending tx frames */
1036 ath5k_rx_stop(sc
); /* turn off frame recv */
1037 ret
= ath5k_hw_reset(ah
, sc
->opmode
, sc
->curchan
, true);
1039 ATH5K_ERR(sc
, "%s: unable to reset channel "
1040 "(%u Mhz)\n", __func__
, chan
->center_freq
);
1044 ath5k_hw_set_txpower_limit(sc
->ah
, 0);
1047 * Re-enable rx framework.
1049 ret
= ath5k_rx_start(sc
);
1051 ATH5K_ERR(sc
, "%s: unable to restart recv logic\n",
1057 * Change channels and update the h/w rate map
1058 * if we're switching; e.g. 11a to 11b/g.
1062 /* ath5k_chan_change(sc, chan); */
1064 ath5k_beacon_config(sc
);
1066 * Re-enable interrupts.
1068 ath5k_hw_set_intr(ah
, sc
->imask
);
1075 * TODO: CLEAN THIS !!!
1078 ath5k_setcurmode(struct ath5k_softc
*sc
, unsigned int mode
)
1080 if (unlikely(test_bit(ATH_STAT_LEDSOFT
, sc
->status
))) {
1081 /* from Atheros NDIS driver, w/ permission */
1082 static const struct {
1083 u16 rate
; /* tx/rx 802.11 rate */
1084 u16 timeOn
; /* LED on time (ms) */
1085 u16 timeOff
; /* LED off time (ms) */
1102 const struct ath5k_rate_table
*rt
=
1103 ath5k_hw_get_rate_table(sc
->ah
, mode
);
1108 memset(sc
->hwmap
, 0, sizeof(sc
->hwmap
));
1109 for (i
= 0; i
< 32; i
++) {
1110 u8 ix
= rt
->rate_code_to_index
[i
];
1112 sc
->hwmap
[i
].ledon
= msecs_to_jiffies(500);
1113 sc
->hwmap
[i
].ledoff
= msecs_to_jiffies(130);
1116 sc
->hwmap
[i
].txflags
= IEEE80211_RADIOTAP_F_DATAPAD
;
1117 /* receive frames include FCS */
1118 sc
->hwmap
[i
].rxflags
= sc
->hwmap
[i
].txflags
|
1119 IEEE80211_RADIOTAP_F_FCS
;
1120 /* setup blink rate table to avoid per-packet lookup */
1121 for (j
= 0; j
< ARRAY_SIZE(blinkrates
) - 1; j
++)
1122 if (blinkrates
[j
].rate
== /* XXX why 7f? */
1123 (rt
->rates
[ix
].dot11_rate
&0x7f))
1126 sc
->hwmap
[i
].ledon
= msecs_to_jiffies(blinkrates
[j
].
1128 sc
->hwmap
[i
].ledoff
= msecs_to_jiffies(blinkrates
[j
].
1135 if (mode
== AR5K_MODE_11A
) {
1136 sc
->curband
= &sc
->sbands
[IEEE80211_BAND_5GHZ
];
1138 sc
->curband
= &sc
->sbands
[IEEE80211_BAND_2GHZ
];
1143 ath5k_mode_setup(struct ath5k_softc
*sc
)
1145 struct ath5k_hw
*ah
= sc
->ah
;
1148 /* configure rx filter */
1149 rfilt
= sc
->filter_flags
;
1150 ath5k_hw_set_rx_filter(ah
, rfilt
);
1152 if (ath5k_hw_hasbssidmask(ah
))
1153 ath5k_hw_set_bssid_mask(ah
, sc
->bssidmask
);
1155 /* configure operational mode */
1156 ath5k_hw_set_opmode(ah
);
1158 ath5k_hw_set_mcast_filter(ah
, 0, 0);
1159 ATH5K_DBG(sc
, ATH5K_DEBUG_MODE
, "RX filter 0x%x\n", rfilt
);
1163 * Match the hw provided rate index (through descriptors)
1164 * to an index for sc->curband->bitrates, so it can be used
1167 * This one is a little bit tricky but i think i'm right
1170 * We have 4 rate tables in the following order:
1174 * 802.11g (12 rates)
1175 * that make the hw rate table.
1177 * Lets take a 5211 for example that supports a and b modes only.
1178 * First comes the 802.11a table and then 802.11b (total 12 rates).
1179 * When hw returns eg. 11 it points to the last 802.11b rate (11Mbit),
1180 * if it returns 2 it points to the second 802.11a rate etc.
1182 * Same goes for 5212 who has xr/a/b/g support (total 28 rates).
1183 * First comes the XR table, then 802.11a, 802.11b and 802.11g.
1184 * When hw returns eg. 27 it points to the last 802.11g rate (54Mbits) etc
1187 ath5k_set_total_hw_rates(struct ath5k_softc
*sc
) {
1189 struct ath5k_hw
*ah
= sc
->ah
;
1191 if (test_bit(AR5K_MODE_11A
, ah
->ah_modes
))
1194 if (test_bit(AR5K_MODE_11B
, ah
->ah_modes
))
1197 if (test_bit(AR5K_MODE_11G
, ah
->ah_modes
))
1200 /* XXX: Need to see what what happens when
1201 xr disable bits in eeprom are set */
1202 if (ah
->ah_version
>= AR5K_AR5212
)
1208 ath5k_hw_to_driver_rix(struct ath5k_softc
*sc
, int hw_rix
) {
1212 if(sc
->curband
->band
== IEEE80211_BAND_2GHZ
) {
1213 /* We setup a g ratetable for both b/g modes */
1215 hw_rix
- sc
->b_rates
- sc
->a_rates
- sc
->xr_rates
;
1217 mac80211_rix
= hw_rix
- sc
->xr_rates
;
1220 /* Something went wrong, fallback to basic rate for this band */
1221 if ((mac80211_rix
>= sc
->curband
->n_bitrates
) ||
1222 (mac80211_rix
<= 0 ))
1225 return mac80211_rix
;
1236 ath5k_rxbuf_setup(struct ath5k_softc
*sc
, struct ath5k_buf
*bf
)
1238 struct ath5k_hw
*ah
= sc
->ah
;
1239 struct sk_buff
*skb
= bf
->skb
;
1240 struct ath5k_desc
*ds
;
1242 if (likely(skb
== NULL
)) {
1246 * Allocate buffer with headroom_needed space for the
1247 * fake physical layer header at the start.
1249 skb
= dev_alloc_skb(sc
->rxbufsize
+ sc
->cachelsz
- 1);
1250 if (unlikely(skb
== NULL
)) {
1251 ATH5K_ERR(sc
, "can't alloc skbuff of size %u\n",
1252 sc
->rxbufsize
+ sc
->cachelsz
- 1);
1256 * Cache-line-align. This is important (for the
1257 * 5210 at least) as not doing so causes bogus data
1260 off
= ((unsigned long)skb
->data
) % sc
->cachelsz
;
1262 skb_reserve(skb
, sc
->cachelsz
- off
);
1265 bf
->skbaddr
= pci_map_single(sc
->pdev
,
1266 skb
->data
, sc
->rxbufsize
, PCI_DMA_FROMDEVICE
);
1267 if (unlikely(pci_dma_mapping_error(bf
->skbaddr
))) {
1268 ATH5K_ERR(sc
, "%s: DMA mapping failed\n", __func__
);
1276 * Setup descriptors. For receive we always terminate
1277 * the descriptor list with a self-linked entry so we'll
1278 * not get overrun under high load (as can happen with a
1279 * 5212 when ANI processing enables PHY error frames).
1281 * To insure the last descriptor is self-linked we create
1282 * each descriptor as self-linked and add it to the end. As
1283 * each additional descriptor is added the previous self-linked
1284 * entry is ``fixed'' naturally. This should be safe even
1285 * if DMA is happening. When processing RX interrupts we
1286 * never remove/process the last, self-linked, entry on the
1287 * descriptor list. This insures the hardware always has
1288 * someplace to write a new frame.
1291 ds
->ds_link
= bf
->daddr
; /* link to self */
1292 ds
->ds_data
= bf
->skbaddr
;
1293 ath5k_hw_setup_rx_desc(ah
, ds
,
1294 skb_tailroom(skb
), /* buffer size */
1297 if (sc
->rxlink
!= NULL
)
1298 *sc
->rxlink
= bf
->daddr
;
1299 sc
->rxlink
= &ds
->ds_link
;
1304 ath5k_txbuf_setup(struct ath5k_softc
*sc
, struct ath5k_buf
*bf
,
1305 struct ieee80211_tx_control
*ctl
)
1307 struct ath5k_hw
*ah
= sc
->ah
;
1308 struct ath5k_txq
*txq
= sc
->txq
;
1309 struct ath5k_desc
*ds
= bf
->desc
;
1310 struct sk_buff
*skb
= bf
->skb
;
1311 unsigned int pktlen
, flags
, keyidx
= AR5K_TXKEYIX_INVALID
;
1314 flags
= AR5K_TXDESC_INTREQ
| AR5K_TXDESC_CLRDMASK
;
1316 /* XXX endianness */
1317 bf
->skbaddr
= pci_map_single(sc
->pdev
, skb
->data
, skb
->len
,
1320 if (ctl
->flags
& IEEE80211_TXCTL_NO_ACK
)
1321 flags
|= AR5K_TXDESC_NOACK
;
1325 if (!(ctl
->flags
& IEEE80211_TXCTL_DO_NOT_ENCRYPT
)) {
1326 keyidx
= ctl
->key_idx
;
1327 pktlen
+= ctl
->icv_len
;
1330 ret
= ah
->ah_setup_tx_desc(ah
, ds
, pktlen
,
1331 ieee80211_get_hdrlen_from_skb(skb
), AR5K_PKT_TYPE_NORMAL
,
1332 (sc
->power_level
* 2), ctl
->tx_rate
->hw_value
,
1333 ctl
->retry_limit
, keyidx
, 0, flags
, 0, 0);
1338 ds
->ds_data
= bf
->skbaddr
;
1340 spin_lock_bh(&txq
->lock
);
1341 list_add_tail(&bf
->list
, &txq
->q
);
1342 sc
->tx_stats
.data
[txq
->qnum
].len
++;
1343 if (txq
->link
== NULL
) /* is this first packet? */
1344 ath5k_hw_put_tx_buf(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_tx_start(ah
, txq
->qnum
);
1350 spin_unlock_bh(&txq
->lock
);
1354 pci_unmap_single(sc
->pdev
, bf
->skbaddr
, skb
->len
, PCI_DMA_TODEVICE
);
1358 /*******************\
1359 * Descriptors setup *
1360 \*******************/
1363 ath5k_desc_alloc(struct ath5k_softc
*sc
, struct pci_dev
*pdev
)
1365 struct ath5k_desc
*ds
;
1366 struct ath5k_buf
*bf
;
1371 /* allocate descriptors */
1372 sc
->desc_len
= sizeof(struct ath5k_desc
) *
1373 (ATH_TXBUF
+ ATH_RXBUF
+ ATH_BCBUF
+ 1);
1374 sc
->desc
= pci_alloc_consistent(pdev
, sc
->desc_len
, &sc
->desc_daddr
);
1375 if (sc
->desc
== NULL
) {
1376 ATH5K_ERR(sc
, "can't allocate descriptors\n");
1381 da
= sc
->desc_daddr
;
1382 ATH5K_DBG(sc
, ATH5K_DEBUG_ANY
, "DMA map: %p (%zu) -> %llx\n",
1383 ds
, sc
->desc_len
, (unsigned long long)sc
->desc_daddr
);
1385 bf
= kcalloc(1 + ATH_TXBUF
+ ATH_RXBUF
+ ATH_BCBUF
,
1386 sizeof(struct ath5k_buf
), GFP_KERNEL
);
1388 ATH5K_ERR(sc
, "can't allocate bufptr\n");
1394 INIT_LIST_HEAD(&sc
->rxbuf
);
1395 for (i
= 0; i
< ATH_RXBUF
; i
++, bf
++, ds
++, da
+= sizeof(*ds
)) {
1398 list_add_tail(&bf
->list
, &sc
->rxbuf
);
1401 INIT_LIST_HEAD(&sc
->txbuf
);
1402 sc
->txbuf_len
= ATH_TXBUF
;
1403 for (i
= 0; i
< ATH_TXBUF
; i
++, bf
++, ds
++,
1404 da
+= sizeof(*ds
)) {
1407 list_add_tail(&bf
->list
, &sc
->txbuf
);
1417 pci_free_consistent(pdev
, sc
->desc_len
, sc
->desc
, sc
->desc_daddr
);
1424 ath5k_desc_free(struct ath5k_softc
*sc
, struct pci_dev
*pdev
)
1426 struct ath5k_buf
*bf
;
1428 ath5k_txbuf_free(sc
, sc
->bbuf
);
1429 list_for_each_entry(bf
, &sc
->txbuf
, list
)
1430 ath5k_txbuf_free(sc
, bf
);
1431 list_for_each_entry(bf
, &sc
->rxbuf
, list
)
1432 ath5k_txbuf_free(sc
, bf
);
1434 /* Free memory associated with all descriptors */
1435 pci_free_consistent(pdev
, sc
->desc_len
, sc
->desc
, sc
->desc_daddr
);
1449 static struct ath5k_txq
*
1450 ath5k_txq_setup(struct ath5k_softc
*sc
,
1451 int qtype
, int subtype
)
1453 struct ath5k_hw
*ah
= sc
->ah
;
1454 struct ath5k_txq
*txq
;
1455 struct ath5k_txq_info qi
= {
1456 .tqi_subtype
= subtype
,
1457 .tqi_aifs
= AR5K_TXQ_USEDEFAULT
,
1458 .tqi_cw_min
= AR5K_TXQ_USEDEFAULT
,
1459 .tqi_cw_max
= AR5K_TXQ_USEDEFAULT
1464 * Enable interrupts only for EOL and DESC conditions.
1465 * We mark tx descriptors to receive a DESC interrupt
1466 * when a tx queue gets deep; otherwise waiting for the
1467 * EOL to reap descriptors. Note that this is done to
1468 * reduce interrupt load and this only defers reaping
1469 * descriptors, never transmitting frames. Aside from
1470 * reducing interrupts this also permits more concurrency.
1471 * The only potential downside is if the tx queue backs
1472 * up in which case the top half of the kernel may backup
1473 * due to a lack of tx descriptors.
1475 qi
.tqi_flags
= AR5K_TXQ_FLAG_TXEOLINT_ENABLE
|
1476 AR5K_TXQ_FLAG_TXDESCINT_ENABLE
;
1477 qnum
= ath5k_hw_setup_tx_queue(ah
, qtype
, &qi
);
1480 * NB: don't print a message, this happens
1481 * normally on parts with too few tx queues
1483 return ERR_PTR(qnum
);
1485 if (qnum
>= ARRAY_SIZE(sc
->txqs
)) {
1486 ATH5K_ERR(sc
, "hw qnum %u out of range, max %tu!\n",
1487 qnum
, ARRAY_SIZE(sc
->txqs
));
1488 ath5k_hw_release_tx_queue(ah
, qnum
);
1489 return ERR_PTR(-EINVAL
);
1491 txq
= &sc
->txqs
[qnum
];
1495 INIT_LIST_HEAD(&txq
->q
);
1496 spin_lock_init(&txq
->lock
);
1499 return &sc
->txqs
[qnum
];
1503 ath5k_beaconq_setup(struct ath5k_hw
*ah
)
1505 struct ath5k_txq_info qi
= {
1506 .tqi_aifs
= AR5K_TXQ_USEDEFAULT
,
1507 .tqi_cw_min
= AR5K_TXQ_USEDEFAULT
,
1508 .tqi_cw_max
= AR5K_TXQ_USEDEFAULT
,
1509 /* NB: for dynamic turbo, don't enable any other interrupts */
1510 .tqi_flags
= AR5K_TXQ_FLAG_TXDESCINT_ENABLE
1513 return ath5k_hw_setup_tx_queue(ah
, AR5K_TX_QUEUE_BEACON
, &qi
);
1517 ath5k_beaconq_config(struct ath5k_softc
*sc
)
1519 struct ath5k_hw
*ah
= sc
->ah
;
1520 struct ath5k_txq_info qi
;
1523 ret
= ath5k_hw_get_tx_queueprops(ah
, sc
->bhalq
, &qi
);
1526 if (sc
->opmode
== IEEE80211_IF_TYPE_AP
) {
1528 * Always burst out beacon and CAB traffic
1529 * (aifs = cwmin = cwmax = 0)
1534 } else if (sc
->opmode
== IEEE80211_IF_TYPE_IBSS
) {
1536 * Adhoc mode; backoff between 0 and (2 * cw_min).
1540 qi
.tqi_cw_max
= 2 * ah
->ah_cw_min
;
1543 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
,
1544 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1545 qi
.tqi_aifs
, qi
.tqi_cw_min
, qi
.tqi_cw_max
);
1547 ret
= ath5k_hw_setup_tx_queueprops(ah
, sc
->bhalq
, &qi
);
1549 ATH5K_ERR(sc
, "%s: unable to update parameters for beacon "
1550 "hardware queue!\n", __func__
);
1554 return ath5k_hw_reset_tx_queue(ah
, sc
->bhalq
); /* push to h/w */;
1558 ath5k_txq_drainq(struct ath5k_softc
*sc
, struct ath5k_txq
*txq
)
1560 struct ath5k_buf
*bf
, *bf0
;
1563 * NB: this assumes output has been stopped and
1564 * we do not need to block ath5k_tx_tasklet
1566 spin_lock_bh(&txq
->lock
);
1567 list_for_each_entry_safe(bf
, bf0
, &txq
->q
, list
) {
1568 ath5k_debug_printtxbuf(sc
, bf
);
1570 ath5k_txbuf_free(sc
, bf
);
1572 spin_lock_bh(&sc
->txbuflock
);
1573 sc
->tx_stats
.data
[txq
->qnum
].len
--;
1574 list_move_tail(&bf
->list
, &sc
->txbuf
);
1576 spin_unlock_bh(&sc
->txbuflock
);
1579 spin_unlock_bh(&txq
->lock
);
1583 * Drain the transmit queues and reclaim resources.
1586 ath5k_txq_cleanup(struct ath5k_softc
*sc
)
1588 struct ath5k_hw
*ah
= sc
->ah
;
1591 /* XXX return value */
1592 if (likely(!test_bit(ATH_STAT_INVALID
, sc
->status
))) {
1593 /* don't touch the hardware if marked invalid */
1594 ath5k_hw_stop_tx_dma(ah
, sc
->bhalq
);
1595 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "beacon queue %x\n",
1596 ath5k_hw_get_tx_buf(ah
, sc
->bhalq
));
1597 for (i
= 0; i
< ARRAY_SIZE(sc
->txqs
); i
++)
1598 if (sc
->txqs
[i
].setup
) {
1599 ath5k_hw_stop_tx_dma(ah
, sc
->txqs
[i
].qnum
);
1600 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "txq [%u] %x, "
1603 ath5k_hw_get_tx_buf(ah
,
1608 ieee80211_start_queues(sc
->hw
); /* XXX move to callers */
1610 for (i
= 0; i
< ARRAY_SIZE(sc
->txqs
); i
++)
1611 if (sc
->txqs
[i
].setup
)
1612 ath5k_txq_drainq(sc
, &sc
->txqs
[i
]);
1616 ath5k_txq_release(struct ath5k_softc
*sc
)
1618 struct ath5k_txq
*txq
= sc
->txqs
;
1621 for (i
= 0; i
< ARRAY_SIZE(sc
->txqs
); i
++, txq
++)
1623 ath5k_hw_release_tx_queue(sc
->ah
, txq
->qnum
);
1636 * Enable the receive h/w following a reset.
1639 ath5k_rx_start(struct ath5k_softc
*sc
)
1641 struct ath5k_hw
*ah
= sc
->ah
;
1642 struct ath5k_buf
*bf
;
1645 sc
->rxbufsize
= roundup(IEEE80211_MAX_LEN
, sc
->cachelsz
);
1647 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "cachelsz %u rxbufsize %u\n",
1648 sc
->cachelsz
, sc
->rxbufsize
);
1652 spin_lock_bh(&sc
->rxbuflock
);
1653 list_for_each_entry(bf
, &sc
->rxbuf
, list
) {
1654 ret
= ath5k_rxbuf_setup(sc
, bf
);
1656 spin_unlock_bh(&sc
->rxbuflock
);
1660 bf
= list_first_entry(&sc
->rxbuf
, struct ath5k_buf
, list
);
1661 spin_unlock_bh(&sc
->rxbuflock
);
1663 ath5k_hw_put_rx_buf(ah
, bf
->daddr
);
1664 ath5k_hw_start_rx(ah
); /* enable recv descriptors */
1665 ath5k_mode_setup(sc
); /* set filters, etc. */
1666 ath5k_hw_start_rx_pcu(ah
); /* re-enable PCU/DMA engine */
1674 * Disable the receive h/w in preparation for a reset.
1677 ath5k_rx_stop(struct ath5k_softc
*sc
)
1679 struct ath5k_hw
*ah
= sc
->ah
;
1681 ath5k_hw_stop_pcu_recv(ah
); /* disable PCU */
1682 ath5k_hw_set_rx_filter(ah
, 0); /* clear recv filter */
1683 ath5k_hw_stop_rx_dma(ah
); /* disable DMA engine */
1684 mdelay(3); /* 3ms is long enough for 1 frame */
1686 ath5k_debug_printrxbuffs(sc
, ah
);
1688 sc
->rxlink
= NULL
; /* just in case */
1692 ath5k_rx_decrypted(struct ath5k_softc
*sc
, struct ath5k_desc
*ds
,
1693 struct sk_buff
*skb
, struct ath5k_rx_status
*rs
)
1695 struct ieee80211_hdr
*hdr
= (void *)skb
->data
;
1696 unsigned int keyix
, hlen
= ieee80211_get_hdrlen_from_skb(skb
);
1698 if (!(rs
->rs_status
& AR5K_RXERR_DECRYPT
) &&
1699 rs
->rs_keyix
!= AR5K_RXKEYIX_INVALID
)
1700 return RX_FLAG_DECRYPTED
;
1702 /* Apparently when a default key is used to decrypt the packet
1703 the hw does not set the index used to decrypt. In such cases
1704 get the index from the packet. */
1705 if ((le16_to_cpu(hdr
->frame_control
) & IEEE80211_FCTL_PROTECTED
) &&
1706 !(rs
->rs_status
& AR5K_RXERR_DECRYPT
) &&
1707 skb
->len
>= hlen
+ 4) {
1708 keyix
= skb
->data
[hlen
+ 3] >> 6;
1710 if (test_bit(keyix
, sc
->keymap
))
1711 return RX_FLAG_DECRYPTED
;
1719 ath5k_check_ibss_tsf(struct ath5k_softc
*sc
, struct sk_buff
*skb
,
1720 struct ieee80211_rx_status
*rxs
)
1724 struct ieee80211_mgmt
*mgmt
= (struct ieee80211_mgmt
*)skb
->data
;
1726 if ((le16_to_cpu(mgmt
->frame_control
) & IEEE80211_FCTL_FTYPE
) ==
1727 IEEE80211_FTYPE_MGMT
&&
1728 (le16_to_cpu(mgmt
->frame_control
) & IEEE80211_FCTL_STYPE
) ==
1729 IEEE80211_STYPE_BEACON
&&
1730 le16_to_cpu(mgmt
->u
.beacon
.capab_info
) & WLAN_CAPABILITY_IBSS
&&
1731 memcmp(mgmt
->bssid
, sc
->ah
->ah_bssid
, 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
);
1780 ath5k_tasklet_rx(unsigned long data
)
1782 struct ieee80211_rx_status rxs
= {};
1783 struct ath5k_rx_status rs
= {};
1784 struct sk_buff
*skb
;
1785 struct ath5k_softc
*sc
= (void *)data
;
1786 struct ath5k_buf
*bf
;
1787 struct ath5k_desc
*ds
;
1792 spin_lock(&sc
->rxbuflock
);
1794 if (unlikely(list_empty(&sc
->rxbuf
))) {
1795 ATH5K_WARN(sc
, "empty rx buf pool\n");
1798 bf
= list_first_entry(&sc
->rxbuf
, struct ath5k_buf
, list
);
1799 BUG_ON(bf
->skb
== NULL
);
1803 /* TODO only one segment */
1804 pci_dma_sync_single_for_cpu(sc
->pdev
, sc
->desc_daddr
,
1805 sc
->desc_len
, PCI_DMA_FROMDEVICE
);
1807 if (unlikely(ds
->ds_link
== bf
->daddr
)) /* this is the end */
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 rxs
.flag
|= RX_FLAG_MMIC_ERROR
;
1847 /* let crypto-error packets fall through in MNTR */
1849 ~(AR5K_RXERR_DECRYPT
|AR5K_RXERR_MIC
)) ||
1850 sc
->opmode
!= IEEE80211_IF_TYPE_MNTR
)
1854 pci_dma_sync_single_for_cpu(sc
->pdev
, bf
->skbaddr
,
1855 rs
.rs_datalen
, PCI_DMA_FROMDEVICE
);
1856 pci_unmap_single(sc
->pdev
, bf
->skbaddr
, sc
->rxbufsize
,
1857 PCI_DMA_FROMDEVICE
);
1860 skb_put(skb
, rs
.rs_datalen
);
1863 * the hardware adds a padding to 4 byte boundaries between
1864 * the header and the payload data if the header length is
1865 * not multiples of 4 - remove it
1867 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1870 memmove(skb
->data
+ pad
, skb
->data
, hdrlen
);
1875 * always extend the mac timestamp, since this information is
1876 * also needed for proper IBSS merging.
1878 * XXX: it might be too late to do it here, since rs_tstamp is
1879 * 15bit only. that means TSF extension has to be done within
1880 * 32768usec (about 32ms). it might be necessary to move this to
1881 * the interrupt handler, like it is done in madwifi.
1883 * Unfortunately we don't know when the hardware takes the rx
1884 * timestamp (beginning of phy frame, data frame, end of rx?).
1885 * The only thing we know is that it is hardware specific...
1886 * On AR5213 it seems the rx timestamp is at the end of the
1887 * frame, but i'm not sure.
1889 * NOTE: mac80211 defines mactime at the beginning of the first
1890 * data symbol. Since we don't have any time references it's
1891 * impossible to comply to that. This affects IBSS merge only
1892 * right now, so it's not too bad...
1894 rxs
.mactime
= ath5k_extend_tsf(sc
->ah
, rs
.rs_tstamp
);
1895 rxs
.flag
|= RX_FLAG_TSFT
;
1897 rxs
.freq
= sc
->curchan
->center_freq
;
1898 rxs
.band
= sc
->curband
->band
;
1902 * the names here are misleading and the usage of these
1903 * values by iwconfig makes it even worse
1905 /* noise floor in dBm, from the last noise calibration */
1906 rxs
.noise
= sc
->ah
->ah_noise_floor
;
1907 /* signal level in dBm */
1908 rxs
.ssi
= rxs
.noise
+ rs
.rs_rssi
;
1910 * "signal" is actually displayed as Link Quality by iwconfig
1911 * we provide a percentage based on rssi (assuming max rssi 64)
1913 rxs
.signal
= rs
.rs_rssi
* 100 / 64;
1915 rxs
.antenna
= rs
.rs_antenna
;
1916 rxs
.rate_idx
= ath5k_hw_to_driver_rix(sc
, rs
.rs_rate
);
1917 rxs
.flag
|= ath5k_rx_decrypted(sc
, ds
, skb
, &rs
);
1919 ath5k_debug_dump_skb(sc
, skb
, "RX ", 0);
1921 /* check beacons in IBSS mode */
1922 if (sc
->opmode
== IEEE80211_IF_TYPE_IBSS
)
1923 ath5k_check_ibss_tsf(sc
, skb
, &rxs
);
1925 __ieee80211_rx(sc
->hw
, skb
, &rxs
);
1926 sc
->led_rxrate
= rs
.rs_rate
;
1927 ath5k_led_event(sc
, ATH_LED_RX
);
1929 list_move_tail(&bf
->list
, &sc
->rxbuf
);
1930 } while (ath5k_rxbuf_setup(sc
, bf
) == 0);
1931 spin_unlock(&sc
->rxbuflock
);
1942 ath5k_tx_processq(struct ath5k_softc
*sc
, struct ath5k_txq
*txq
)
1944 struct ieee80211_tx_status txs
= {};
1945 struct ath5k_tx_status ts
= {};
1946 struct ath5k_buf
*bf
, *bf0
;
1947 struct ath5k_desc
*ds
;
1948 struct sk_buff
*skb
;
1951 spin_lock(&txq
->lock
);
1952 list_for_each_entry_safe(bf
, bf0
, &txq
->q
, list
) {
1955 /* TODO only one segment */
1956 pci_dma_sync_single_for_cpu(sc
->pdev
, sc
->desc_daddr
,
1957 sc
->desc_len
, PCI_DMA_FROMDEVICE
);
1958 ret
= sc
->ah
->ah_proc_tx_desc(sc
->ah
, ds
, &ts
);
1959 if (unlikely(ret
== -EINPROGRESS
))
1961 else if (unlikely(ret
)) {
1962 ATH5K_ERR(sc
, "error %d while processing queue %u\n",
1969 pci_unmap_single(sc
->pdev
, bf
->skbaddr
, skb
->len
,
1972 txs
.control
= bf
->ctl
;
1973 txs
.retry_count
= ts
.ts_shortretry
+ ts
.ts_longretry
/ 6;
1974 if (unlikely(ts
.ts_status
)) {
1975 sc
->ll_stats
.dot11ACKFailureCount
++;
1976 if (ts
.ts_status
& AR5K_TXERR_XRETRY
)
1977 txs
.excessive_retries
= 1;
1978 else if (ts
.ts_status
& AR5K_TXERR_FILT
)
1979 txs
.flags
|= IEEE80211_TX_STATUS_TX_FILTERED
;
1981 txs
.flags
|= IEEE80211_TX_STATUS_ACK
;
1982 txs
.ack_signal
= ts
.ts_rssi
;
1985 ieee80211_tx_status(sc
->hw
, skb
, &txs
);
1986 sc
->tx_stats
.data
[txq
->qnum
].count
++;
1988 spin_lock(&sc
->txbuflock
);
1989 sc
->tx_stats
.data
[txq
->qnum
].len
--;
1990 list_move_tail(&bf
->list
, &sc
->txbuf
);
1992 spin_unlock(&sc
->txbuflock
);
1994 if (likely(list_empty(&txq
->q
)))
1996 spin_unlock(&txq
->lock
);
1997 if (sc
->txbuf_len
> ATH_TXBUF
/ 5)
1998 ieee80211_wake_queues(sc
->hw
);
2002 ath5k_tasklet_tx(unsigned long data
)
2004 struct ath5k_softc
*sc
= (void *)data
;
2006 ath5k_tx_processq(sc
, sc
->txq
);
2008 ath5k_led_event(sc
, ATH_LED_TX
);
2019 * Setup the beacon frame for transmit.
2022 ath5k_beacon_setup(struct ath5k_softc
*sc
, struct ath5k_buf
*bf
,
2023 struct ieee80211_tx_control
*ctl
)
2025 struct sk_buff
*skb
= bf
->skb
;
2026 struct ath5k_hw
*ah
= sc
->ah
;
2027 struct ath5k_desc
*ds
;
2028 int ret
, antenna
= 0;
2031 bf
->skbaddr
= pci_map_single(sc
->pdev
, skb
->data
, skb
->len
,
2033 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
, "skb %p [data %p len %u] "
2034 "skbaddr %llx\n", skb
, skb
->data
, skb
->len
,
2035 (unsigned long long)bf
->skbaddr
);
2036 if (pci_dma_mapping_error(bf
->skbaddr
)) {
2037 ATH5K_ERR(sc
, "beacon DMA mapping failed\n");
2043 flags
= AR5K_TXDESC_NOACK
;
2044 if (sc
->opmode
== IEEE80211_IF_TYPE_IBSS
&& ath5k_hw_hasveol(ah
)) {
2045 ds
->ds_link
= bf
->daddr
; /* self-linked */
2046 flags
|= AR5K_TXDESC_VEOL
;
2048 * Let hardware handle antenna switching if txantenna is not set
2053 * Switch antenna every 4 beacons if txantenna is not set
2054 * XXX assumes two antennas
2057 antenna
= sc
->bsent
& 4 ? 2 : 1;
2060 ds
->ds_data
= bf
->skbaddr
;
2061 ret
= ah
->ah_setup_tx_desc(ah
, ds
, skb
->len
,
2062 ieee80211_get_hdrlen_from_skb(skb
),
2063 AR5K_PKT_TYPE_BEACON
, (sc
->power_level
* 2),
2064 ctl
->tx_rate
->hw_value
, 1, AR5K_TXKEYIX_INVALID
,
2065 antenna
, flags
, 0, 0);
2071 pci_unmap_single(sc
->pdev
, bf
->skbaddr
, skb
->len
, PCI_DMA_TODEVICE
);
2076 * Transmit a beacon frame at SWBA. Dynamic updates to the
2077 * frame contents are done as needed and the slot time is
2078 * also adjusted based on current state.
2080 * this is usually called from interrupt context (ath5k_intr())
2081 * but also from ath5k_beacon_config() in IBSS mode which in turn
2082 * can be called from a tasklet and user context
2085 ath5k_beacon_send(struct ath5k_softc
*sc
)
2087 struct ath5k_buf
*bf
= sc
->bbuf
;
2088 struct ath5k_hw
*ah
= sc
->ah
;
2090 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
, "in beacon_send\n");
2092 if (unlikely(bf
->skb
== NULL
|| sc
->opmode
== IEEE80211_IF_TYPE_STA
||
2093 sc
->opmode
== IEEE80211_IF_TYPE_MNTR
)) {
2094 ATH5K_WARN(sc
, "bf=%p bf_skb=%p\n", bf
, bf
? bf
->skb
: NULL
);
2098 * Check if the previous beacon has gone out. If
2099 * not don't don't try to post another, skip this
2100 * period and wait for the next. Missed beacons
2101 * indicate a problem and should not occur. If we
2102 * miss too many consecutive beacons reset the device.
2104 if (unlikely(ath5k_hw_num_tx_pending(ah
, sc
->bhalq
) != 0)) {
2106 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
,
2107 "missed %u consecutive beacons\n", sc
->bmisscount
);
2108 if (sc
->bmisscount
> 3) { /* NB: 3 is a guess */
2109 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
,
2110 "stuck beacon time (%u missed)\n",
2112 tasklet_schedule(&sc
->restq
);
2116 if (unlikely(sc
->bmisscount
!= 0)) {
2117 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
,
2118 "resume beacon xmit after %u misses\n",
2124 * Stop any current dma and put the new frame on the queue.
2125 * This should never fail since we check above that no frames
2126 * are still pending on the queue.
2128 if (unlikely(ath5k_hw_stop_tx_dma(ah
, sc
->bhalq
))) {
2129 ATH5K_WARN(sc
, "beacon queue %u didn't stop?\n", sc
->bhalq
);
2130 /* NB: hw still stops DMA, so proceed */
2132 pci_dma_sync_single_for_cpu(sc
->pdev
, bf
->skbaddr
, bf
->skb
->len
,
2135 ath5k_hw_put_tx_buf(ah
, sc
->bhalq
, bf
->daddr
);
2136 ath5k_hw_tx_start(ah
, sc
->bhalq
);
2137 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
, "TXDP[%u] = %llx (%p)\n",
2138 sc
->bhalq
, (unsigned long long)bf
->daddr
, bf
->desc
);
2145 * ath5k_beacon_update_timers - update beacon timers
2147 * @sc: struct ath5k_softc pointer we are operating on
2148 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
2149 * beacon timer update based on the current HW TSF.
2151 * Calculate the next target beacon transmit time (TBTT) based on the timestamp
2152 * of a received beacon or the current local hardware TSF and write it to the
2153 * beacon timer registers.
2155 * This is called in a variety of situations, e.g. when a beacon is received,
2156 * when a TSF update has been detected, but also when an new IBSS is created or
2157 * when we otherwise know we have to update the timers, but we keep it in this
2158 * function to have it all together in one place.
2161 ath5k_beacon_update_timers(struct ath5k_softc
*sc
, u64 bc_tsf
)
2163 struct ath5k_hw
*ah
= sc
->ah
;
2164 u32 nexttbtt
, intval
, hw_tu
, bc_tu
;
2167 intval
= sc
->bintval
& AR5K_BEACON_PERIOD
;
2168 if (WARN_ON(!intval
))
2171 /* beacon TSF converted to TU */
2172 bc_tu
= TSF_TO_TU(bc_tsf
);
2174 /* current TSF converted to TU */
2175 hw_tsf
= ath5k_hw_get_tsf64(ah
);
2176 hw_tu
= TSF_TO_TU(hw_tsf
);
2179 /* we use FUDGE to make sure the next TBTT is ahead of the current TU */
2182 * no beacons received, called internally.
2183 * just need to refresh timers based on HW TSF.
2185 nexttbtt
= roundup(hw_tu
+ FUDGE
, intval
);
2186 } else if (bc_tsf
== 0) {
2188 * no beacon received, probably called by ath5k_reset_tsf().
2189 * reset TSF to start with 0.
2192 intval
|= AR5K_BEACON_RESET_TSF
;
2193 } else if (bc_tsf
> hw_tsf
) {
2195 * beacon received, SW merge happend but HW TSF not yet updated.
2196 * not possible to reconfigure timers yet, but next time we
2197 * receive a beacon with the same BSSID, the hardware will
2198 * automatically update the TSF and then we need to reconfigure
2201 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
,
2202 "need to wait for HW TSF sync\n");
2206 * most important case for beacon synchronization between STA.
2208 * beacon received and HW TSF has been already updated by HW.
2209 * update next TBTT based on the TSF of the beacon, but make
2210 * sure it is ahead of our local TSF timer.
2212 nexttbtt
= bc_tu
+ roundup(hw_tu
+ FUDGE
- bc_tu
, intval
);
2216 sc
->nexttbtt
= nexttbtt
;
2218 intval
|= AR5K_BEACON_ENA
;
2219 ath5k_hw_init_beacon(ah
, nexttbtt
, intval
);
2222 * debugging output last in order to preserve the time critical aspect
2226 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
,
2227 "reconfigured timers based on HW TSF\n");
2228 else if (bc_tsf
== 0)
2229 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
,
2230 "reset HW TSF and timers\n");
2232 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
,
2233 "updated timers based on beacon TSF\n");
2235 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
,
2236 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2237 (unsigned long long) bc_tsf
,
2238 (unsigned long long) hw_tsf
, bc_tu
, hw_tu
, nexttbtt
);
2239 ATH5K_DBG_UNLIMIT(sc
, ATH5K_DEBUG_BEACON
, "intval %u %s %s\n",
2240 intval
& AR5K_BEACON_PERIOD
,
2241 intval
& AR5K_BEACON_ENA
? "AR5K_BEACON_ENA" : "",
2242 intval
& AR5K_BEACON_RESET_TSF
? "AR5K_BEACON_RESET_TSF" : "");
2247 * ath5k_beacon_config - Configure the beacon queues and interrupts
2249 * @sc: struct ath5k_softc pointer we are operating on
2251 * When operating in station mode we want to receive a BMISS interrupt when we
2252 * stop seeing beacons from the AP we've associated with so we can look for
2253 * another AP to associate with.
2255 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2256 * interrupts to detect TSF updates only.
2258 * AP mode is missing.
2261 ath5k_beacon_config(struct ath5k_softc
*sc
)
2263 struct ath5k_hw
*ah
= sc
->ah
;
2265 ath5k_hw_set_intr(ah
, 0);
2268 if (sc
->opmode
== IEEE80211_IF_TYPE_STA
) {
2269 sc
->imask
|= AR5K_INT_BMISS
;
2270 } else if (sc
->opmode
== IEEE80211_IF_TYPE_IBSS
) {
2272 * In IBSS mode we use a self-linked tx descriptor and let the
2273 * hardware send the beacons automatically. We have to load it
2275 * We use the SWBA interrupt only to keep track of the beacon
2276 * timers in order to detect automatic TSF updates.
2278 ath5k_beaconq_config(sc
);
2280 sc
->imask
|= AR5K_INT_SWBA
;
2282 if (ath5k_hw_hasveol(ah
))
2283 ath5k_beacon_send(sc
);
2287 ath5k_hw_set_intr(ah
, sc
->imask
);
2291 /********************\
2292 * Interrupt handling *
2293 \********************/
2296 ath5k_init(struct ath5k_softc
*sc
)
2300 mutex_lock(&sc
->lock
);
2302 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "mode %d\n", sc
->opmode
);
2305 * Stop anything previously setup. This is safe
2306 * no matter this is the first time through or not.
2308 ath5k_stop_locked(sc
);
2311 * The basic interface to setting the hardware in a good
2312 * state is ``reset''. On return the hardware is known to
2313 * be powered up and with interrupts disabled. This must
2314 * be followed by initialization of the appropriate bits
2315 * and then setup of the interrupt mask.
2317 sc
->curchan
= sc
->hw
->conf
.channel
;
2318 sc
->curband
= &sc
->sbands
[sc
->curchan
->band
];
2319 ret
= ath5k_hw_reset(sc
->ah
, sc
->opmode
, sc
->curchan
, false);
2321 ATH5K_ERR(sc
, "unable to reset hardware: %d\n", ret
);
2325 * This is needed only to setup initial state
2326 * but it's best done after a reset.
2328 ath5k_hw_set_txpower_limit(sc
->ah
, 0);
2331 * Setup the hardware after reset: the key cache
2332 * is filled as needed and the receive engine is
2333 * set going. Frame transmit is handled entirely
2334 * in the frame output path; there's nothing to do
2335 * here except setup the interrupt mask.
2337 ret
= ath5k_rx_start(sc
);
2342 * Enable interrupts.
2344 sc
->imask
= AR5K_INT_RX
| AR5K_INT_TX
| AR5K_INT_RXEOL
|
2345 AR5K_INT_RXORN
| AR5K_INT_FATAL
| AR5K_INT_GLOBAL
|
2348 ath5k_hw_set_intr(sc
->ah
, sc
->imask
);
2349 /* Set ack to be sent at low bit-rates */
2350 ath5k_hw_set_ack_bitrate_high(sc
->ah
, false);
2352 mod_timer(&sc
->calib_tim
, round_jiffies(jiffies
+
2353 msecs_to_jiffies(ath5k_calinterval
* 1000)));
2357 mutex_unlock(&sc
->lock
);
2362 ath5k_stop_locked(struct ath5k_softc
*sc
)
2364 struct ath5k_hw
*ah
= sc
->ah
;
2366 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "invalid %u\n",
2367 test_bit(ATH_STAT_INVALID
, sc
->status
));
2370 * Shutdown the hardware and driver:
2371 * stop output from above
2372 * disable interrupts
2374 * turn off the radio
2375 * clear transmit machinery
2376 * clear receive machinery
2377 * drain and release tx queues
2378 * reclaim beacon resources
2379 * power down hardware
2381 * Note that some of this work is not possible if the
2382 * hardware is gone (invalid).
2384 ieee80211_stop_queues(sc
->hw
);
2386 if (!test_bit(ATH_STAT_INVALID
, sc
->status
)) {
2387 if (test_bit(ATH_STAT_LEDSOFT
, sc
->status
)) {
2388 del_timer_sync(&sc
->led_tim
);
2389 ath5k_hw_set_gpio(ah
, sc
->led_pin
, !sc
->led_on
);
2390 __clear_bit(ATH_STAT_LEDBLINKING
, sc
->status
);
2392 ath5k_hw_set_intr(ah
, 0);
2394 ath5k_txq_cleanup(sc
);
2395 if (!test_bit(ATH_STAT_INVALID
, sc
->status
)) {
2397 ath5k_hw_phy_disable(ah
);
2405 * Stop the device, grabbing the top-level lock to protect
2406 * against concurrent entry through ath5k_init (which can happen
2407 * if another thread does a system call and the thread doing the
2408 * stop is preempted).
2411 ath5k_stop_hw(struct ath5k_softc
*sc
)
2415 mutex_lock(&sc
->lock
);
2416 ret
= ath5k_stop_locked(sc
);
2417 if (ret
== 0 && !test_bit(ATH_STAT_INVALID
, sc
->status
)) {
2419 * Set the chip in full sleep mode. Note that we are
2420 * careful to do this only when bringing the interface
2421 * completely to a stop. When the chip is in this state
2422 * it must be carefully woken up or references to
2423 * registers in the PCI clock domain may freeze the bus
2424 * (and system). This varies by chip and is mostly an
2425 * issue with newer parts that go to sleep more quickly.
2427 if (sc
->ah
->ah_mac_srev
>= 0x78) {
2430 * don't put newer MAC revisions > 7.8 to sleep because
2431 * of the above mentioned problems
2433 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "mac version > 7.8, "
2434 "not putting device to sleep\n");
2436 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
,
2437 "putting device to full sleep\n");
2438 ath5k_hw_set_power(sc
->ah
, AR5K_PM_FULL_SLEEP
, true, 0);
2441 ath5k_txbuf_free(sc
, sc
->bbuf
);
2442 mutex_unlock(&sc
->lock
);
2444 del_timer_sync(&sc
->calib_tim
);
2450 ath5k_intr(int irq
, void *dev_id
)
2452 struct ath5k_softc
*sc
= dev_id
;
2453 struct ath5k_hw
*ah
= sc
->ah
;
2454 enum ath5k_int status
;
2455 unsigned int counter
= 1000;
2457 if (unlikely(test_bit(ATH_STAT_INVALID
, sc
->status
) ||
2458 !ath5k_hw_is_intr_pending(ah
)))
2463 * Figure out the reason(s) for the interrupt. Note
2464 * that get_isr returns a pseudo-ISR that may include
2465 * bits we haven't explicitly enabled so we mask the
2466 * value to insure we only process bits we requested.
2468 ath5k_hw_get_isr(ah
, &status
); /* NB: clears IRQ too */
2469 ATH5K_DBG(sc
, ATH5K_DEBUG_INTR
, "status 0x%x/0x%x\n",
2471 status
&= sc
->imask
; /* discard unasked for bits */
2472 if (unlikely(status
& AR5K_INT_FATAL
)) {
2474 * Fatal errors are unrecoverable.
2475 * Typically these are caused by DMA errors.
2477 tasklet_schedule(&sc
->restq
);
2478 } else if (unlikely(status
& AR5K_INT_RXORN
)) {
2479 tasklet_schedule(&sc
->restq
);
2481 if (status
& AR5K_INT_SWBA
) {
2483 * Software beacon alert--time to send a beacon.
2484 * Handle beacon transmission directly; deferring
2485 * this is too slow to meet timing constraints
2488 * In IBSS mode we use this interrupt just to
2489 * keep track of the next TBTT (target beacon
2490 * transmission time) in order to detect wether
2491 * automatic TSF updates happened.
2493 if (sc
->opmode
== IEEE80211_IF_TYPE_IBSS
) {
2494 /* XXX: only if VEOL suppported */
2495 u64 tsf
= ath5k_hw_get_tsf64(ah
);
2496 sc
->nexttbtt
+= sc
->bintval
;
2497 ATH5K_DBG(sc
, ATH5K_DEBUG_BEACON
,
2498 "SWBA nexttbtt: %x hw_tu: %x "
2502 (unsigned long long) tsf
);
2504 ath5k_beacon_send(sc
);
2507 if (status
& AR5K_INT_RXEOL
) {
2509 * NB: the hardware should re-read the link when
2510 * RXE bit is written, but it doesn't work at
2511 * least on older hardware revs.
2515 if (status
& AR5K_INT_TXURN
) {
2516 /* bump tx trigger level */
2517 ath5k_hw_update_tx_triglevel(ah
, true);
2519 if (status
& AR5K_INT_RX
)
2520 tasklet_schedule(&sc
->rxtq
);
2521 if (status
& AR5K_INT_TX
)
2522 tasklet_schedule(&sc
->txtq
);
2523 if (status
& AR5K_INT_BMISS
) {
2525 if (status
& AR5K_INT_MIB
) {
2527 * These stats are also used for ANI i think
2528 * so how about updating them more often ?
2530 ath5k_hw_update_mib_counters(ah
, &sc
->ll_stats
);
2533 } while (ath5k_hw_is_intr_pending(ah
) && counter
-- > 0);
2535 if (unlikely(!counter
))
2536 ATH5K_WARN(sc
, "too many interrupts, giving up for now\n");
2542 ath5k_tasklet_reset(unsigned long data
)
2544 struct ath5k_softc
*sc
= (void *)data
;
2546 ath5k_reset(sc
->hw
);
2550 * Periodically recalibrate the PHY to account
2551 * for temperature/environment changes.
2554 ath5k_calibrate(unsigned long data
)
2556 struct ath5k_softc
*sc
= (void *)data
;
2557 struct ath5k_hw
*ah
= sc
->ah
;
2559 ATH5K_DBG(sc
, ATH5K_DEBUG_CALIBRATE
, "channel %u/%x\n",
2560 ieee80211_frequency_to_channel(sc
->curchan
->center_freq
),
2561 sc
->curchan
->hw_value
);
2563 if (ath5k_hw_get_rf_gain(ah
) == AR5K_RFGAIN_NEED_CHANGE
) {
2565 * Rfgain is out of bounds, reset the chip
2566 * to load new gain values.
2568 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "calibration, resetting\n");
2569 ath5k_reset(sc
->hw
);
2571 if (ath5k_hw_phy_calibrate(ah
, sc
->curchan
))
2572 ATH5K_ERR(sc
, "calibration of channel %u failed\n",
2573 ieee80211_frequency_to_channel(
2574 sc
->curchan
->center_freq
));
2576 mod_timer(&sc
->calib_tim
, round_jiffies(jiffies
+
2577 msecs_to_jiffies(ath5k_calinterval
* 1000)));
2587 ath5k_led_off(unsigned long data
)
2589 struct ath5k_softc
*sc
= (void *)data
;
2591 if (test_bit(ATH_STAT_LEDENDBLINK
, sc
->status
))
2592 __clear_bit(ATH_STAT_LEDBLINKING
, sc
->status
);
2594 __set_bit(ATH_STAT_LEDENDBLINK
, sc
->status
);
2595 ath5k_hw_set_gpio(sc
->ah
, sc
->led_pin
, !sc
->led_on
);
2596 mod_timer(&sc
->led_tim
, jiffies
+ sc
->led_off
);
2601 * Blink the LED according to the specified on/off times.
2604 ath5k_led_blink(struct ath5k_softc
*sc
, unsigned int on
,
2607 ATH5K_DBG(sc
, ATH5K_DEBUG_LED
, "on %u off %u\n", on
, off
);
2608 ath5k_hw_set_gpio(sc
->ah
, sc
->led_pin
, sc
->led_on
);
2609 __set_bit(ATH_STAT_LEDBLINKING
, sc
->status
);
2610 __clear_bit(ATH_STAT_LEDENDBLINK
, sc
->status
);
2612 mod_timer(&sc
->led_tim
, jiffies
+ on
);
2616 ath5k_led_event(struct ath5k_softc
*sc
, int event
)
2618 if (likely(!test_bit(ATH_STAT_LEDSOFT
, sc
->status
)))
2620 if (unlikely(test_bit(ATH_STAT_LEDBLINKING
, sc
->status
)))
2621 return; /* don't interrupt active blink */
2624 ath5k_led_blink(sc
, sc
->hwmap
[sc
->led_txrate
].ledon
,
2625 sc
->hwmap
[sc
->led_txrate
].ledoff
);
2628 ath5k_led_blink(sc
, sc
->hwmap
[sc
->led_rxrate
].ledon
,
2629 sc
->hwmap
[sc
->led_rxrate
].ledoff
);
2637 /********************\
2638 * Mac80211 functions *
2639 \********************/
2642 ath5k_tx(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
2643 struct ieee80211_tx_control
*ctl
)
2645 struct ath5k_softc
*sc
= hw
->priv
;
2646 struct ath5k_buf
*bf
;
2647 unsigned long flags
;
2651 ath5k_debug_dump_skb(sc
, skb
, "TX ", 1);
2653 if (sc
->opmode
== IEEE80211_IF_TYPE_MNTR
)
2654 ATH5K_DBG(sc
, ATH5K_DEBUG_XMIT
, "tx in monitor (scan?)\n");
2657 * the hardware expects the header padded to 4 byte boundaries
2658 * if this is not the case we add the padding after the header
2660 hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
2663 if (skb_headroom(skb
) < pad
) {
2664 ATH5K_ERR(sc
, "tx hdrlen not %%4: %d not enough"
2665 " headroom to pad %d\n", hdrlen
, pad
);
2669 memmove(skb
->data
, skb
->data
+pad
, hdrlen
);
2672 sc
->led_txrate
= ctl
->tx_rate
->hw_value
;
2674 spin_lock_irqsave(&sc
->txbuflock
, flags
);
2675 if (list_empty(&sc
->txbuf
)) {
2676 ATH5K_ERR(sc
, "no further txbuf available, dropping packet\n");
2677 spin_unlock_irqrestore(&sc
->txbuflock
, flags
);
2678 ieee80211_stop_queue(hw
, ctl
->queue
);
2681 bf
= list_first_entry(&sc
->txbuf
, struct ath5k_buf
, list
);
2682 list_del(&bf
->list
);
2684 if (list_empty(&sc
->txbuf
))
2685 ieee80211_stop_queues(hw
);
2686 spin_unlock_irqrestore(&sc
->txbuflock
, flags
);
2690 if (ath5k_txbuf_setup(sc
, bf
, ctl
)) {
2692 spin_lock_irqsave(&sc
->txbuflock
, flags
);
2693 list_add_tail(&bf
->list
, &sc
->txbuf
);
2695 spin_unlock_irqrestore(&sc
->txbuflock
, flags
);
2696 dev_kfree_skb_any(skb
);
2704 ath5k_reset(struct ieee80211_hw
*hw
)
2706 struct ath5k_softc
*sc
= hw
->priv
;
2707 struct ath5k_hw
*ah
= sc
->ah
;
2710 ATH5K_DBG(sc
, ATH5K_DEBUG_RESET
, "resetting\n");
2712 ath5k_hw_set_intr(ah
, 0);
2713 ath5k_txq_cleanup(sc
);
2716 ret
= ath5k_hw_reset(ah
, sc
->opmode
, sc
->curchan
, true);
2717 if (unlikely(ret
)) {
2718 ATH5K_ERR(sc
, "can't reset hardware (%d)\n", ret
);
2721 ath5k_hw_set_txpower_limit(sc
->ah
, 0);
2723 ret
= ath5k_rx_start(sc
);
2724 if (unlikely(ret
)) {
2725 ATH5K_ERR(sc
, "can't start recv logic\n");
2729 * We may be doing a reset in response to an ioctl
2730 * that changes the channel so update any state that
2731 * might change as a result.
2735 /* ath5k_chan_change(sc, c); */
2736 ath5k_beacon_config(sc
);
2737 /* intrs are started by ath5k_beacon_config */
2739 ieee80211_wake_queues(hw
);
2746 static int ath5k_start(struct ieee80211_hw
*hw
)
2748 return ath5k_init(hw
->priv
);
2751 static void ath5k_stop(struct ieee80211_hw
*hw
)
2753 ath5k_stop_hw(hw
->priv
);
2756 static int ath5k_add_interface(struct ieee80211_hw
*hw
,
2757 struct ieee80211_if_init_conf
*conf
)
2759 struct ath5k_softc
*sc
= hw
->priv
;
2762 mutex_lock(&sc
->lock
);
2768 sc
->vif
= conf
->vif
;
2770 switch (conf
->type
) {
2771 case IEEE80211_IF_TYPE_STA
:
2772 case IEEE80211_IF_TYPE_IBSS
:
2773 case IEEE80211_IF_TYPE_MNTR
:
2774 sc
->opmode
= conf
->type
;
2782 mutex_unlock(&sc
->lock
);
2787 ath5k_remove_interface(struct ieee80211_hw
*hw
,
2788 struct ieee80211_if_init_conf
*conf
)
2790 struct ath5k_softc
*sc
= hw
->priv
;
2792 mutex_lock(&sc
->lock
);
2793 if (sc
->vif
!= conf
->vif
)
2798 mutex_unlock(&sc
->lock
);
2802 * TODO: Phy disable/diversity etc
2805 ath5k_config(struct ieee80211_hw
*hw
,
2806 struct ieee80211_conf
*conf
)
2808 struct ath5k_softc
*sc
= hw
->priv
;
2810 sc
->bintval
= conf
->beacon_int
;
2811 sc
->power_level
= conf
->power_level
;
2813 return ath5k_chan_set(sc
, conf
->channel
);
2817 ath5k_config_interface(struct ieee80211_hw
*hw
, struct ieee80211_vif
*vif
,
2818 struct ieee80211_if_conf
*conf
)
2820 struct ath5k_softc
*sc
= hw
->priv
;
2821 struct ath5k_hw
*ah
= sc
->ah
;
2824 /* Set to a reasonable value. Note that this will
2825 * be set to mac80211's value at ath5k_config(). */
2827 mutex_lock(&sc
->lock
);
2828 if (sc
->vif
!= vif
) {
2833 /* Cache for later use during resets */
2834 memcpy(ah
->ah_bssid
, conf
->bssid
, ETH_ALEN
);
2835 /* XXX: assoc id is set to 0 for now, mac80211 doesn't have
2836 * a clean way of letting us retrieve this yet. */
2837 ath5k_hw_set_associd(ah
, ah
->ah_bssid
, 0);
2839 mutex_unlock(&sc
->lock
);
2841 return ath5k_reset(hw
);
2843 mutex_unlock(&sc
->lock
);
2847 #define SUPPORTED_FIF_FLAGS \
2848 FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \
2849 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
2850 FIF_BCN_PRBRESP_PROMISC
2852 * o always accept unicast, broadcast, and multicast traffic
2853 * o multicast traffic for all BSSIDs will be enabled if mac80211
2855 * o maintain current state of phy ofdm or phy cck error reception.
2856 * If the hardware detects any of these type of errors then
2857 * ath5k_hw_get_rx_filter() will pass to us the respective
2858 * hardware filters to be able to receive these type of frames.
2859 * o probe request frames are accepted only when operating in
2860 * hostap, adhoc, or monitor modes
2861 * o enable promiscuous mode according to the interface state
2863 * - when operating in adhoc mode so the 802.11 layer creates
2864 * node table entries for peers,
2865 * - when operating in station mode for collecting rssi data when
2866 * the station is otherwise quiet, or
2869 static void ath5k_configure_filter(struct ieee80211_hw
*hw
,
2870 unsigned int changed_flags
,
2871 unsigned int *new_flags
,
2872 int mc_count
, struct dev_mc_list
*mclist
)
2874 struct ath5k_softc
*sc
= hw
->priv
;
2875 struct ath5k_hw
*ah
= sc
->ah
;
2876 u32 mfilt
[2], val
, rfilt
;
2883 /* Only deal with supported flags */
2884 changed_flags
&= SUPPORTED_FIF_FLAGS
;
2885 *new_flags
&= SUPPORTED_FIF_FLAGS
;
2887 /* If HW detects any phy or radar errors, leave those filters on.
2888 * Also, always enable Unicast, Broadcasts and Multicast
2889 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
2890 rfilt
= (ath5k_hw_get_rx_filter(ah
) & (AR5K_RX_FILTER_PHYERR
)) |
2891 (AR5K_RX_FILTER_UCAST
| AR5K_RX_FILTER_BCAST
|
2892 AR5K_RX_FILTER_MCAST
);
2894 if (changed_flags
& (FIF_PROMISC_IN_BSS
| FIF_OTHER_BSS
)) {
2895 if (*new_flags
& FIF_PROMISC_IN_BSS
) {
2896 rfilt
|= AR5K_RX_FILTER_PROM
;
2897 __set_bit(ATH_STAT_PROMISC
, sc
->status
);
2900 __clear_bit(ATH_STAT_PROMISC
, sc
->status
);
2903 /* Note, AR5K_RX_FILTER_MCAST is already enabled */
2904 if (*new_flags
& FIF_ALLMULTI
) {
2908 for (i
= 0; i
< mc_count
; i
++) {
2911 /* calculate XOR of eight 6-bit values */
2912 val
= LE_READ_4(mclist
->dmi_addr
+ 0);
2913 pos
= (val
>> 18) ^ (val
>> 12) ^ (val
>> 6) ^ val
;
2914 val
= LE_READ_4(mclist
->dmi_addr
+ 3);
2915 pos
^= (val
>> 18) ^ (val
>> 12) ^ (val
>> 6) ^ val
;
2917 mfilt
[pos
/ 32] |= (1 << (pos
% 32));
2918 /* XXX: we might be able to just do this instead,
2919 * but not sure, needs testing, if we do use this we'd
2920 * neet to inform below to not reset the mcast */
2921 /* ath5k_hw_set_mcast_filterindex(ah,
2922 * mclist->dmi_addr[5]); */
2923 mclist
= mclist
->next
;
2927 /* This is the best we can do */
2928 if (*new_flags
& (FIF_FCSFAIL
| FIF_PLCPFAIL
))
2929 rfilt
|= AR5K_RX_FILTER_PHYERR
;
2931 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
2932 * and probes for any BSSID, this needs testing */
2933 if (*new_flags
& FIF_BCN_PRBRESP_PROMISC
)
2934 rfilt
|= AR5K_RX_FILTER_BEACON
| AR5K_RX_FILTER_PROBEREQ
;
2936 /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
2937 * set we should only pass on control frames for this
2938 * station. This needs testing. I believe right now this
2939 * enables *all* control frames, which is OK.. but
2940 * but we should see if we can improve on granularity */
2941 if (*new_flags
& FIF_CONTROL
)
2942 rfilt
|= AR5K_RX_FILTER_CONTROL
;
2944 /* Additional settings per mode -- this is per ath5k */
2946 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
2948 if (sc
->opmode
== IEEE80211_IF_TYPE_MNTR
)
2949 rfilt
|= AR5K_RX_FILTER_CONTROL
| AR5K_RX_FILTER_BEACON
|
2950 AR5K_RX_FILTER_PROBEREQ
| AR5K_RX_FILTER_PROM
;
2951 if (sc
->opmode
!= IEEE80211_IF_TYPE_STA
)
2952 rfilt
|= AR5K_RX_FILTER_PROBEREQ
;
2953 if (sc
->opmode
!= IEEE80211_IF_TYPE_AP
&&
2954 test_bit(ATH_STAT_PROMISC
, sc
->status
))
2955 rfilt
|= AR5K_RX_FILTER_PROM
;
2956 if (sc
->opmode
== IEEE80211_IF_TYPE_STA
||
2957 sc
->opmode
== IEEE80211_IF_TYPE_IBSS
) {
2958 rfilt
|= AR5K_RX_FILTER_BEACON
;
2962 ath5k_hw_set_rx_filter(ah
,rfilt
);
2964 /* Set multicast bits */
2965 ath5k_hw_set_mcast_filter(ah
, mfilt
[0], mfilt
[1]);
2966 /* Set the cached hw filter flags, this will alter actually
2968 sc
->filter_flags
= rfilt
;
2972 ath5k_set_key(struct ieee80211_hw
*hw
, enum set_key_cmd cmd
,
2973 const u8
*local_addr
, const u8
*addr
,
2974 struct ieee80211_key_conf
*key
)
2976 struct ath5k_softc
*sc
= hw
->priv
;
2981 /* XXX: fix hardware encryption, its not working. For now
2982 * allow software encryption */
2992 mutex_lock(&sc
->lock
);
2996 ret
= ath5k_hw_set_key(sc
->ah
, key
->keyidx
, key
, addr
);
2998 ATH5K_ERR(sc
, "can't set the key\n");
3001 __set_bit(key
->keyidx
, sc
->keymap
);
3002 key
->hw_key_idx
= key
->keyidx
;
3005 ath5k_hw_reset_key(sc
->ah
, key
->keyidx
);
3006 __clear_bit(key
->keyidx
, sc
->keymap
);
3014 mutex_unlock(&sc
->lock
);
3019 ath5k_get_stats(struct ieee80211_hw
*hw
,
3020 struct ieee80211_low_level_stats
*stats
)
3022 struct ath5k_softc
*sc
= hw
->priv
;
3023 struct ath5k_hw
*ah
= sc
->ah
;
3026 ath5k_hw_update_mib_counters(ah
, &sc
->ll_stats
);
3028 memcpy(stats
, &sc
->ll_stats
, sizeof(sc
->ll_stats
));
3034 ath5k_get_tx_stats(struct ieee80211_hw
*hw
,
3035 struct ieee80211_tx_queue_stats
*stats
)
3037 struct ath5k_softc
*sc
= hw
->priv
;
3039 memcpy(stats
, &sc
->tx_stats
, sizeof(sc
->tx_stats
));
3045 ath5k_get_tsf(struct ieee80211_hw
*hw
)
3047 struct ath5k_softc
*sc
= hw
->priv
;
3049 return ath5k_hw_get_tsf64(sc
->ah
);
3053 ath5k_reset_tsf(struct ieee80211_hw
*hw
)
3055 struct ath5k_softc
*sc
= hw
->priv
;
3058 * in IBSS mode we need to update the beacon timers too.
3059 * this will also reset the TSF if we call it with 0
3061 if (sc
->opmode
== IEEE80211_IF_TYPE_IBSS
)
3062 ath5k_beacon_update_timers(sc
, 0);
3064 ath5k_hw_reset_tsf(sc
->ah
);
3068 ath5k_beacon_update(struct ieee80211_hw
*hw
, struct sk_buff
*skb
,
3069 struct ieee80211_tx_control
*ctl
)
3071 struct ath5k_softc
*sc
= hw
->priv
;
3074 ath5k_debug_dump_skb(sc
, skb
, "BC ", 1);
3076 mutex_lock(&sc
->lock
);
3078 if (sc
->opmode
!= IEEE80211_IF_TYPE_IBSS
) {
3083 ath5k_txbuf_free(sc
, sc
->bbuf
);
3084 sc
->bbuf
->skb
= skb
;
3085 ret
= ath5k_beacon_setup(sc
, sc
->bbuf
, ctl
);
3087 sc
->bbuf
->skb
= NULL
;
3089 ath5k_beacon_config(sc
);
3092 mutex_unlock(&sc
->lock
);