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>
8 * Modified for iPXE, July 2009, by Joshua Oreman <oremanj@rwcr.net>
9 * Original from Linux kernel 2.6.30.
11 * All rights reserved.
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer,
18 * without modification.
19 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
20 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
21 * redistribution must be conditioned upon including a substantially
22 * similar Disclaimer requirement for further binary redistribution.
23 * 3. Neither the names of the above-listed copyright holders nor the names
24 * of any contributors may be used to endorse or promote products derived
25 * from this software without specific prior written permission.
27 * Alternatively, this software may be distributed under the terms of the
28 * GNU General Public License ("GPL") version 2 as published by the Free
29 * Software Foundation.
32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
33 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
34 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
35 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
36 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
37 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
38 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
39 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
40 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
41 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
42 * THE POSSIBILITY OF SUCH DAMAGES.
46 FILE_LICENCE ( BSD3 );
49 #include <ipxe/malloc.h>
50 #include <ipxe/timer.h>
51 #include <ipxe/netdevice.h>
53 #include <ipxe/pci_io.h>
58 #define ATH5K_CALIB_INTERVAL 10 /* Calibrate PHY every 10 seconds */
59 #define ATH5K_RETRIES 4 /* Number of times to retry packet sends */
60 #define ATH5K_DESC_ALIGN 16 /* Alignment for TX/RX descriptors */
67 static struct pci_device_id ath5k_nics[] = {
68 PCI_ROM(0x168c, 0x0207, "ath5210e", "Atheros 5210 early", AR5K_AR5210),
69 PCI_ROM(0x168c, 0x0007, "ath5210", "Atheros 5210", AR5K_AR5210),
70 PCI_ROM(0x168c, 0x0011, "ath5311", "Atheros 5311 (AHB)", AR5K_AR5211),
71 PCI_ROM(0x168c, 0x0012, "ath5211", "Atheros 5211", AR5K_AR5211),
72 PCI_ROM(0x168c, 0x0013, "ath5212", "Atheros 5212", AR5K_AR5212),
73 PCI_ROM(0xa727, 0x0013, "ath5212c","3com Ath 5212", AR5K_AR5212),
74 PCI_ROM(0x10b7, 0x0013, "rdag675", "3com 3CRDAG675", AR5K_AR5212),
75 PCI_ROM(0x168c, 0x1014, "ath5212m", "Ath 5212 miniPCI", AR5K_AR5212),
76 PCI_ROM(0x168c, 0x0014, "ath5212x14", "Atheros 5212 x14", AR5K_AR5212),
77 PCI_ROM(0x168c, 0x0015, "ath5212x15", "Atheros 5212 x15", AR5K_AR5212),
78 PCI_ROM(0x168c, 0x0016, "ath5212x16", "Atheros 5212 x16", AR5K_AR5212),
79 PCI_ROM(0x168c, 0x0017, "ath5212x17", "Atheros 5212 x17", AR5K_AR5212),
80 PCI_ROM(0x168c, 0x0018, "ath5212x18", "Atheros 5212 x18", AR5K_AR5212),
81 PCI_ROM(0x168c, 0x0019, "ath5212x19", "Atheros 5212 x19", AR5K_AR5212),
82 PCI_ROM(0x168c, 0x001a, "ath2413", "Atheros 2413 Griffin", AR5K_AR5212),
83 PCI_ROM(0x168c, 0x001b, "ath5413", "Atheros 5413 Eagle", AR5K_AR5212),
84 PCI_ROM(0x168c, 0x001c, "ath5212e", "Atheros 5212 PCI-E", AR5K_AR5212),
85 PCI_ROM(0x168c, 0x001d, "ath2417", "Atheros 2417 Nala", AR5K_AR5212),
89 static const struct ath5k_srev_name srev_names[] = {
90 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
91 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
92 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
93 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B },
94 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 },
95 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 },
96 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 },
97 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A },
98 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 },
99 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 },
100 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 },
101 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 },
102 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 },
103 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 },
104 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 },
105 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
106 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
107 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
108 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
109 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
110 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
111 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A },
112 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 },
113 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 },
114 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A },
115 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B },
116 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 },
117 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A },
118 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
119 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
120 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
121 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
122 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
123 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
124 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
125 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
128 #define ATH5K_SPMBL_NO 1
129 #define ATH5K_SPMBL_YES 2
130 #define ATH5K_SPMBL_BOTH 3
132 static const struct {
137 { 10, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_1M },
138 { 20, ATH5K_SPMBL_NO, ATH5K_RATE_CODE_2M },
139 { 55, ATH5K_SPMBL_NO, ATH5K_RATE_CODE_5_5M },
140 { 110, ATH5K_SPMBL_NO, ATH5K_RATE_CODE_11M },
141 { 60, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_6M },
142 { 90, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_9M },
143 { 120, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_12M },
144 { 180, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_18M },
145 { 240, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_24M },
146 { 360, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_36M },
147 { 480, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_48M },
148 { 540, ATH5K_SPMBL_BOTH, ATH5K_RATE_CODE_54M },
149 { 20, ATH5K_SPMBL_YES, ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE },
150 { 55, ATH5K_SPMBL_YES, ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE },
151 { 110, ATH5K_SPMBL_YES, ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE },
155 #define ATH5K_NR_RATES 15
158 * Prototypes - PCI stack related functions
160 static int ath5k_probe(struct pci_device *pdev);
161 static void ath5k_remove(struct pci_device *pdev);
163 struct pci_driver ath5k_pci_driver __pci_driver = {
165 .id_count = sizeof(ath5k_nics) / sizeof(ath5k_nics[0]),
166 .probe = ath5k_probe,
167 .remove = ath5k_remove,
173 * Prototypes - MAC 802.11 stack related functions
175 static int ath5k_tx(struct net80211_device *dev, struct io_buffer *skb);
176 static int ath5k_reset(struct ath5k_softc *sc, struct net80211_channel *chan);
177 static int ath5k_reset_wake(struct ath5k_softc *sc);
178 static int ath5k_start(struct net80211_device *dev);
179 static void ath5k_stop(struct net80211_device *dev);
180 static int ath5k_config(struct net80211_device *dev, int changed);
181 static void ath5k_poll(struct net80211_device *dev);
182 static void ath5k_irq(struct net80211_device *dev, int enable);
184 static struct net80211_device_operations ath5k_ops = {
187 .transmit = ath5k_tx,
190 .config = ath5k_config,
194 * Prototypes - Internal functions
197 static int ath5k_attach(struct net80211_device *dev);
198 static void ath5k_detach(struct net80211_device *dev);
199 /* Channel/mode setup */
200 static unsigned int ath5k_copy_channels(struct ath5k_hw *ah,
201 struct net80211_channel *channels,
204 static int ath5k_setup_bands(struct net80211_device *dev);
205 static int ath5k_chan_set(struct ath5k_softc *sc,
206 struct net80211_channel *chan);
207 static void ath5k_setcurmode(struct ath5k_softc *sc,
209 static void ath5k_mode_setup(struct ath5k_softc *sc);
211 /* Descriptor setup */
212 static int ath5k_desc_alloc(struct ath5k_softc *sc);
213 static void ath5k_desc_free(struct ath5k_softc *sc);
215 static int ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf);
216 static int ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf);
218 static inline void ath5k_txbuf_free(struct ath5k_softc *sc,
219 struct ath5k_buf *bf)
224 net80211_tx_complete(sc->dev, bf->iob, 0, ECANCELED);
228 static inline void ath5k_rxbuf_free(struct ath5k_softc *sc __unused,
229 struct ath5k_buf *bf)
236 static int ath5k_txq_setup(struct ath5k_softc *sc,
237 int qtype, int subtype);
238 static void ath5k_txq_drainq(struct ath5k_softc *sc,
239 struct ath5k_txq *txq);
240 static void ath5k_txq_cleanup(struct ath5k_softc *sc);
241 static void ath5k_txq_release(struct ath5k_softc *sc);
243 static int ath5k_rx_start(struct ath5k_softc *sc);
244 static void ath5k_rx_stop(struct ath5k_softc *sc);
246 static void ath5k_tx_processq(struct ath5k_softc *sc,
247 struct ath5k_txq *txq);
249 /* Interrupt handling */
250 static int ath5k_init(struct ath5k_softc *sc);
251 static int ath5k_stop_hw(struct ath5k_softc *sc);
253 static void ath5k_calibrate(struct ath5k_softc *sc);
256 static void ath5k_configure_filter(struct ath5k_softc *sc);
258 /********************\
259 * PCI Initialization *
260 \********************/
264 ath5k_chip_name(enum ath5k_srev_type type, u16 val)
266 const char *name = "xxxxx";
269 for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
270 if (srev_names[i].sr_type != type)
273 if ((val & 0xf0) == srev_names[i].sr_val)
274 name = srev_names[i].sr_name;
276 if ((val & 0xff) == srev_names[i].sr_val) {
277 name = srev_names[i].sr_name;
286 static int ath5k_probe(struct pci_device *pdev)
289 struct ath5k_softc *sc;
290 struct net80211_device *dev;
294 adjust_pci_device(pdev);
297 * Cache line size is used to size and align various
298 * structures used to communicate with the hardware.
300 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
303 * We must have this setup properly for rx buffer
304 * DMA to work so force a reasonable value here if it
308 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
311 * The default setting of latency timer yields poor results,
312 * set it to the value used by other systems. It may be worth
313 * tweaking this setting more.
315 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
318 * Disable the RETRY_TIMEOUT register (0x41) to keep
319 * PCI Tx retries from interfering with C3 CPU state.
321 pci_write_config_byte(pdev, 0x41, 0);
323 mem = ioremap(pdev->membase, 0x10000);
325 DBG("ath5k: cannot remap PCI memory region\n");
331 * Allocate dev (net80211 main struct)
332 * and dev->priv (driver private data)
334 dev = net80211_alloc(sizeof(*sc));
336 DBG("ath5k: cannot allocate 802.11 device\n");
341 /* Initialize driver private data */
346 sc->hwinfo = zalloc(sizeof(*sc->hwinfo));
348 DBG("ath5k: cannot allocate 802.11 hardware info structure\n");
353 sc->hwinfo->flags = NET80211_HW_RX_HAS_FCS;
354 sc->hwinfo->signal_type = NET80211_SIGNAL_DB;
355 sc->hwinfo->signal_max = 40; /* 35dB should give perfect 54Mbps */
356 sc->hwinfo->channel_change_time = 5000;
358 /* Avoid working with the device until setup is complete */
359 sc->status |= ATH_STAT_INVALID;
362 sc->cachelsz = csz * 4; /* convert to bytes */
364 DBG("ath5k: register base at %p (%08lx)\n", sc->iobase, pdev->membase);
365 DBG("ath5k: cache line size %d\n", sc->cachelsz);
367 /* Set private data */
368 pci_set_drvdata(pdev, dev);
369 dev->netdev->dev = (struct device *)pdev;
371 /* Initialize device */
372 ret = ath5k_hw_attach(sc, pdev->id->driver_data, &sc->ah);
374 goto err_free_hwinfo;
376 /* Finish private driver data initialization */
377 ret = ath5k_attach(dev);
382 DBG("Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
383 ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
384 sc->ah->ah_mac_srev, sc->ah->ah_phy_revision);
386 if (!sc->ah->ah_single_chip) {
387 /* Single chip radio (!RF5111) */
388 if (sc->ah->ah_radio_5ghz_revision &&
389 !sc->ah->ah_radio_2ghz_revision) {
390 /* No 5GHz support -> report 2GHz radio */
391 if (!(sc->ah->ah_capabilities.cap_mode & AR5K_MODE_BIT_11A)) {
392 DBG("RF%s 2GHz radio found (0x%x)\n",
393 ath5k_chip_name(AR5K_VERSION_RAD,
394 sc->ah->ah_radio_5ghz_revision),
395 sc->ah->ah_radio_5ghz_revision);
396 /* No 2GHz support (5110 and some
397 * 5Ghz only cards) -> report 5Ghz radio */
398 } else if (!(sc->ah->ah_capabilities.cap_mode & AR5K_MODE_BIT_11B)) {
399 DBG("RF%s 5GHz radio found (0x%x)\n",
400 ath5k_chip_name(AR5K_VERSION_RAD,
401 sc->ah->ah_radio_5ghz_revision),
402 sc->ah->ah_radio_5ghz_revision);
403 /* Multiband radio */
405 DBG("RF%s multiband radio found (0x%x)\n",
406 ath5k_chip_name(AR5K_VERSION_RAD,
407 sc->ah->ah_radio_5ghz_revision),
408 sc->ah->ah_radio_5ghz_revision);
411 /* Multi chip radio (RF5111 - RF2111) ->
412 * report both 2GHz/5GHz radios */
413 else if (sc->ah->ah_radio_5ghz_revision &&
414 sc->ah->ah_radio_2ghz_revision) {
415 DBG("RF%s 5GHz radio found (0x%x)\n",
416 ath5k_chip_name(AR5K_VERSION_RAD,
417 sc->ah->ah_radio_5ghz_revision),
418 sc->ah->ah_radio_5ghz_revision);
419 DBG("RF%s 2GHz radio found (0x%x)\n",
420 ath5k_chip_name(AR5K_VERSION_RAD,
421 sc->ah->ah_radio_2ghz_revision),
422 sc->ah->ah_radio_2ghz_revision);
428 sc->status &= ~ATH_STAT_INVALID;
432 ath5k_hw_detach(sc->ah);
443 static void ath5k_remove(struct pci_device *pdev)
445 struct net80211_device *dev = pci_get_drvdata(pdev);
446 struct ath5k_softc *sc = dev->priv;
449 ath5k_hw_detach(sc->ah);
456 /***********************\
457 * Driver Initialization *
458 \***********************/
461 ath5k_attach(struct net80211_device *dev)
463 struct ath5k_softc *sc = dev->priv;
464 struct ath5k_hw *ah = sc->ah;
468 * Collect the channel list. The 802.11 layer
469 * is resposible for filtering this list based
470 * on settings like the phy mode and regulatory
471 * domain restrictions.
473 ret = ath5k_setup_bands(dev);
475 DBG("ath5k: can't get channels\n");
479 /* NB: setup here so ath5k_rate_update is happy */
480 if (ah->ah_modes & AR5K_MODE_BIT_11A)
481 ath5k_setcurmode(sc, AR5K_MODE_11A);
483 ath5k_setcurmode(sc, AR5K_MODE_11B);
486 * Allocate tx+rx descriptors and populate the lists.
488 ret = ath5k_desc_alloc(sc);
490 DBG("ath5k: can't allocate descriptors\n");
495 * Allocate hardware transmit queues. Note that hw functions
496 * handle reseting these queues at the needed time.
498 ret = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
500 DBG("ath5k: can't setup xmit queue\n");
504 sc->last_calib_ticks = currticks();
506 ret = ath5k_eeprom_read_mac(ah, sc->hwinfo->hwaddr);
508 DBG("ath5k: unable to read address from EEPROM: 0x%04x\n",
513 memset(sc->bssidmask, 0xff, ETH_ALEN);
514 ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
516 ret = net80211_register(sc->dev, &ath5k_ops, sc->hwinfo);
518 DBG("ath5k: can't register ieee80211 hw\n");
524 ath5k_txq_release(sc);
532 ath5k_detach(struct net80211_device *dev)
534 struct ath5k_softc *sc = dev->priv;
536 net80211_unregister(dev);
538 ath5k_txq_release(sc);
544 /********************\
545 * Channel/mode setup *
546 \********************/
549 * Convert IEEE channel number to MHz frequency.
552 ath5k_ieee2mhz(short chan)
555 return 2407 + 5 * chan;
559 return 2212 + 20 * chan;
560 return 5000 + 5 * chan;
564 ath5k_copy_channels(struct ath5k_hw *ah,
565 struct net80211_channel *channels,
566 unsigned int mode, unsigned int max)
568 unsigned int i, count, size, chfreq, freq, ch;
570 if (!(ah->ah_modes & (1 << mode)))
575 case AR5K_MODE_11A_TURBO:
576 /* 1..220, but 2GHz frequencies are filtered by check_channel */
578 chfreq = CHANNEL_5GHZ;
582 case AR5K_MODE_11G_TURBO:
584 chfreq = CHANNEL_2GHZ;
590 for (i = 0, count = 0; i < size && max > 0; i++) {
592 freq = ath5k_ieee2mhz(ch);
594 /* Check if channel is supported by the chipset */
595 if (!ath5k_channel_ok(ah, freq, chfreq))
598 /* Write channel info and increment counter */
599 channels[count].center_freq = freq;
600 channels[count].maxpower = 0; /* use regulatory */
601 channels[count].band = (chfreq == CHANNEL_2GHZ) ?
602 NET80211_BAND_2GHZ : NET80211_BAND_5GHZ;
606 channels[count].hw_value = chfreq | CHANNEL_OFDM;
608 case AR5K_MODE_11A_TURBO:
609 case AR5K_MODE_11G_TURBO:
610 channels[count].hw_value = chfreq |
611 CHANNEL_OFDM | CHANNEL_TURBO;
614 channels[count].hw_value = CHANNEL_B;
625 ath5k_setup_bands(struct net80211_device *dev)
627 struct ath5k_softc *sc = dev->priv;
628 struct ath5k_hw *ah = sc->ah;
629 int max_c, count_c = 0;
633 max_c = sizeof(sc->hwinfo->channels) / sizeof(sc->hwinfo->channels[0]);
636 if (sc->ah->ah_capabilities.cap_mode & AR5K_MODE_BIT_11G) {
638 band = NET80211_BAND_2GHZ;
639 sc->hwinfo->bands = NET80211_BAND_BIT_2GHZ;
640 sc->hwinfo->modes = (NET80211_MODE_G | NET80211_MODE_B);
642 for (i = 0; i < 12; i++)
643 sc->hwinfo->rates[band][i] = ath5k_rates[i].bitrate;
644 sc->hwinfo->nr_rates[band] = 12;
646 sc->hwinfo->nr_channels =
647 ath5k_copy_channels(ah, sc->hwinfo->channels,
648 AR5K_MODE_11G, max_c);
649 count_c = sc->hwinfo->nr_channels;
651 } else if (sc->ah->ah_capabilities.cap_mode & AR5K_MODE_BIT_11B) {
653 band = NET80211_BAND_2GHZ;
654 sc->hwinfo->bands = NET80211_BAND_BIT_2GHZ;
655 sc->hwinfo->modes = NET80211_MODE_B;
657 for (i = 0; i < 4; i++)
658 sc->hwinfo->rates[band][i] = ath5k_rates[i].bitrate;
659 sc->hwinfo->nr_rates[band] = 4;
661 sc->hwinfo->nr_channels =
662 ath5k_copy_channels(ah, sc->hwinfo->channels,
663 AR5K_MODE_11B, max_c);
664 count_c = sc->hwinfo->nr_channels;
668 /* 5GHz band, A mode */
669 if (sc->ah->ah_capabilities.cap_mode & AR5K_MODE_BIT_11A) {
670 band = NET80211_BAND_5GHZ;
671 sc->hwinfo->bands |= NET80211_BAND_BIT_5GHZ;
672 sc->hwinfo->modes |= NET80211_MODE_A;
674 for (i = 0; i < 8; i++)
675 sc->hwinfo->rates[band][i] = ath5k_rates[i+4].bitrate;
676 sc->hwinfo->nr_rates[band] = 8;
678 sc->hwinfo->nr_channels =
679 ath5k_copy_channels(ah, sc->hwinfo->channels,
680 AR5K_MODE_11B, max_c);
681 count_c = sc->hwinfo->nr_channels;
689 * Set/change channels. If the channel is really being changed,
690 * it's done by reseting the chip. To accomplish this we must
691 * first cleanup any pending DMA, then restart stuff after a la
695 ath5k_chan_set(struct ath5k_softc *sc, struct net80211_channel *chan)
697 if (chan->center_freq != sc->curchan->center_freq ||
698 chan->hw_value != sc->curchan->hw_value) {
700 * To switch channels clear any pending DMA operations;
701 * wait long enough for the RX fifo to drain, reset the
702 * hardware at the new frequency, and then re-enable
703 * the relevant bits of the h/w.
705 DBG2("ath5k: resetting for channel change (%d -> %d MHz)\n",
706 sc->curchan->center_freq, chan->center_freq);
707 return ath5k_reset(sc, chan);
714 ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
718 if (mode == AR5K_MODE_11A) {
719 sc->curband = NET80211_BAND_5GHZ;
721 sc->curband = NET80211_BAND_2GHZ;
726 ath5k_mode_setup(struct ath5k_softc *sc)
728 struct ath5k_hw *ah = sc->ah;
731 /* configure rx filter */
732 rfilt = sc->filter_flags;
733 ath5k_hw_set_rx_filter(ah, rfilt);
735 if (ath5k_hw_hasbssidmask(ah))
736 ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
738 /* configure operational mode */
739 ath5k_hw_set_opmode(ah);
741 ath5k_hw_set_mcast_filter(ah, 0, 0);
745 ath5k_hw_rix_to_bitrate(int hw_rix)
749 for (i = 0; i < ATH5K_NR_RATES; i++) {
750 if (ath5k_rates[i].hw_code == hw_rix)
751 return ath5k_rates[i].bitrate;
754 DBG("ath5k: invalid rix %02x\n", hw_rix);
755 return 10; /* use lowest rate */
758 int ath5k_bitrate_to_hw_rix(int bitrate)
762 for (i = 0; i < ATH5K_NR_RATES; i++) {
763 if (ath5k_rates[i].bitrate == bitrate)
764 return ath5k_rates[i].hw_code;
767 DBG("ath5k: invalid bitrate %d\n", bitrate);
768 return ATH5K_RATE_CODE_1M; /* use lowest rate */
775 static struct io_buffer *
776 ath5k_rx_iob_alloc(struct ath5k_softc *sc, u32 *iob_addr)
778 struct io_buffer *iob;
782 * Allocate buffer with headroom_needed space for the
783 * fake physical layer header at the start.
785 iob = alloc_iob(sc->rxbufsize + sc->cachelsz - 1);
788 DBG("ath5k: can't alloc iobuf of size %d\n",
789 sc->rxbufsize + sc->cachelsz - 1);
793 *iob_addr = virt_to_bus(iob->data);
796 * Cache-line-align. This is important (for the
797 * 5210 at least) as not doing so causes bogus data
800 off = *iob_addr % sc->cachelsz;
802 iob_reserve(iob, sc->cachelsz - off);
803 *iob_addr += sc->cachelsz - off;
810 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
812 struct ath5k_hw *ah = sc->ah;
813 struct io_buffer *iob = bf->iob;
814 struct ath5k_desc *ds;
817 iob = ath5k_rx_iob_alloc(sc, &bf->iobaddr);
824 * Setup descriptors. For receive we always terminate
825 * the descriptor list with a self-linked entry so we'll
826 * not get overrun under high load (as can happen with a
827 * 5212 when ANI processing enables PHY error frames).
829 * To insure the last descriptor is self-linked we create
830 * each descriptor as self-linked and add it to the end. As
831 * each additional descriptor is added the previous self-linked
832 * entry is ``fixed'' naturally. This should be safe even
833 * if DMA is happening. When processing RX interrupts we
834 * never remove/process the last, self-linked, entry on the
835 * descriptor list. This insures the hardware always has
836 * someplace to write a new frame.
839 ds->ds_link = bf->daddr; /* link to self */
840 ds->ds_data = bf->iobaddr;
841 if (ah->ah_setup_rx_desc(ah, ds,
842 iob_tailroom(iob), /* buffer size */
844 DBG("ath5k: error setting up RX descriptor for %zd bytes\n", iob_tailroom(iob));
848 if (sc->rxlink != NULL)
849 *sc->rxlink = bf->daddr;
850 sc->rxlink = &ds->ds_link;
855 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
857 struct ath5k_hw *ah = sc->ah;
858 struct ath5k_txq *txq = &sc->txq;
859 struct ath5k_desc *ds = bf->desc;
860 struct io_buffer *iob = bf->iob;
861 unsigned int pktlen, flags;
866 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
867 bf->iobaddr = virt_to_bus(iob->data);
868 pktlen = iob_len(iob);
870 /* FIXME: If we are in g mode and rate is a CCK rate
871 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
872 * from tx power (value is in dB units already) */
873 if (sc->dev->phy_flags & NET80211_PHY_USE_PROTECTION) {
874 struct net80211_device *dev = sc->dev;
876 flags |= AR5K_TXDESC_CTSENA;
877 cts_rate = sc->hw_rtscts_rate;
878 duration = net80211_cts_duration(dev, pktlen);
880 ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
881 IEEE80211_TYP_FRAME_HEADER_LEN,
882 AR5K_PKT_TYPE_NORMAL, sc->power_level * 2,
883 sc->hw_rate, ATH5K_RETRIES,
884 AR5K_TXKEYIX_INVALID, 0, flags,
890 ds->ds_data = bf->iobaddr;
892 list_add_tail(&bf->list, &txq->q);
893 if (txq->link == NULL) /* is this first packet? */
894 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
895 else /* no, so only link it */
896 *txq->link = bf->daddr;
898 txq->link = &ds->ds_link;
899 ath5k_hw_start_tx_dma(ah, txq->qnum);
905 /*******************\
906 * Descriptors setup *
907 \*******************/
910 ath5k_desc_alloc(struct ath5k_softc *sc)
912 struct ath5k_desc *ds;
913 struct ath5k_buf *bf;
918 /* allocate descriptors */
919 sc->desc_len = sizeof(struct ath5k_desc) * (ATH_TXBUF + ATH_RXBUF + 1);
920 sc->desc = malloc_dma(sc->desc_len, ATH5K_DESC_ALIGN);
921 if (sc->desc == NULL) {
922 DBG("ath5k: can't allocate descriptors\n");
926 memset(sc->desc, 0, sc->desc_len);
927 sc->desc_daddr = virt_to_bus(sc->desc);
932 bf = calloc(ATH_TXBUF + ATH_RXBUF + 1, sizeof(struct ath5k_buf));
934 DBG("ath5k: can't allocate buffer pointers\n");
940 INIT_LIST_HEAD(&sc->rxbuf);
941 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
944 list_add_tail(&bf->list, &sc->rxbuf);
947 INIT_LIST_HEAD(&sc->txbuf);
948 sc->txbuf_len = ATH_TXBUF;
949 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
952 list_add_tail(&bf->list, &sc->txbuf);
958 free_dma(sc->desc, sc->desc_len);
965 ath5k_desc_free(struct ath5k_softc *sc)
967 struct ath5k_buf *bf;
969 list_for_each_entry(bf, &sc->txbuf, list)
970 ath5k_txbuf_free(sc, bf);
971 list_for_each_entry(bf, &sc->rxbuf, list)
972 ath5k_rxbuf_free(sc, bf);
974 /* Free memory associated with all descriptors */
975 free_dma(sc->desc, sc->desc_len);
990 ath5k_txq_setup(struct ath5k_softc *sc, int qtype, int subtype)
992 struct ath5k_hw *ah = sc->ah;
993 struct ath5k_txq *txq;
994 struct ath5k_txq_info qi = {
995 .tqi_subtype = subtype,
996 .tqi_aifs = AR5K_TXQ_USEDEFAULT,
997 .tqi_cw_min = AR5K_TXQ_USEDEFAULT,
998 .tqi_cw_max = AR5K_TXQ_USEDEFAULT
1003 * Enable interrupts only for EOL and DESC conditions.
1004 * We mark tx descriptors to receive a DESC interrupt
1005 * when a tx queue gets deep; otherwise waiting for the
1006 * EOL to reap descriptors. Note that this is done to
1007 * reduce interrupt load and this only defers reaping
1008 * descriptors, never transmitting frames. Aside from
1009 * reducing interrupts this also permits more concurrency.
1010 * The only potential downside is if the tx queue backs
1011 * up in which case the top half of the kernel may backup
1012 * due to a lack of tx descriptors.
1014 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
1015 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
1016 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
1018 DBG("ath5k: can't set up a TX queue\n");
1026 INIT_LIST_HEAD(&txq->q);
1033 ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1035 struct ath5k_buf *bf, *bf0;
1037 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1038 ath5k_txbuf_free(sc, bf);
1040 list_del(&bf->list);
1041 list_add_tail(&bf->list, &sc->txbuf);
1048 * Drain the transmit queues and reclaim resources.
1051 ath5k_txq_cleanup(struct ath5k_softc *sc)
1053 struct ath5k_hw *ah = sc->ah;
1055 if (!(sc->status & ATH_STAT_INVALID)) {
1056 /* don't touch the hardware if marked invalid */
1057 if (sc->txq.setup) {
1058 ath5k_hw_stop_tx_dma(ah, sc->txq.qnum);
1059 DBG("ath5k: txq [%d] %x, link %p\n",
1061 ath5k_hw_get_txdp(ah, sc->txq.qnum),
1067 ath5k_txq_drainq(sc, &sc->txq);
1071 ath5k_txq_release(struct ath5k_softc *sc)
1073 if (sc->txq.setup) {
1074 ath5k_hw_release_tx_queue(sc->ah);
1087 * Enable the receive h/w following a reset.
1090 ath5k_rx_start(struct ath5k_softc *sc)
1092 struct ath5k_hw *ah = sc->ah;
1093 struct ath5k_buf *bf;
1096 sc->rxbufsize = IEEE80211_MAX_LEN;
1097 if (sc->rxbufsize % sc->cachelsz != 0)
1098 sc->rxbufsize += sc->cachelsz - (sc->rxbufsize % sc->cachelsz);
1102 list_for_each_entry(bf, &sc->rxbuf, list) {
1103 ret = ath5k_rxbuf_setup(sc, bf);
1108 bf = list_entry(sc->rxbuf.next, struct ath5k_buf, list);
1110 ath5k_hw_set_rxdp(ah, bf->daddr);
1111 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
1112 ath5k_mode_setup(sc); /* set filters, etc. */
1113 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
1119 * Disable the receive h/w in preparation for a reset.
1122 ath5k_rx_stop(struct ath5k_softc *sc)
1124 struct ath5k_hw *ah = sc->ah;
1126 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
1127 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
1128 ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */
1130 sc->rxlink = NULL; /* just in case */
1134 ath5k_handle_rx(struct ath5k_softc *sc)
1136 struct ath5k_rx_status rs;
1137 struct io_buffer *iob, *next_iob;
1139 struct ath5k_buf *bf, *bf_last;
1140 struct ath5k_desc *ds;
1143 memset(&rs, 0, sizeof(rs));
1145 if (list_empty(&sc->rxbuf)) {
1146 DBG("ath5k: empty rx buf pool\n");
1150 bf_last = list_entry(sc->rxbuf.prev, struct ath5k_buf, list);
1153 bf = list_entry(sc->rxbuf.next, struct ath5k_buf, list);
1154 assert(bf->iob != NULL);
1159 * last buffer must not be freed to ensure proper hardware
1160 * function. When the hardware finishes also a packet next to
1161 * it, we are sure, it doesn't use it anymore and we can go on.
1166 struct ath5k_buf *bf_next = list_entry(bf->list.next,
1167 struct ath5k_buf, list);
1168 ret = sc->ah->ah_proc_rx_desc(sc->ah, bf_next->desc,
1173 /* skip the overwritten one (even status is martian) */
1177 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1179 if (ret != -EINPROGRESS) {
1180 DBG("ath5k: error in processing rx desc: %s\n",
1182 net80211_rx_err(sc->dev, NULL, -ret);
1184 /* normal return, reached end of
1185 available descriptors */
1191 DBG("ath5k: unsupported fragmented rx\n");
1196 if (rs.rs_status & AR5K_RXERR_PHY) {
1197 /* These are uncommon, and may indicate a real problem. */
1198 net80211_rx_err(sc->dev, NULL, EIO);
1201 if (rs.rs_status & AR5K_RXERR_CRC) {
1202 /* These occur *all the time*. */
1205 if (rs.rs_status & AR5K_RXERR_DECRYPT) {
1207 * Decrypt error. If the error occurred
1208 * because there was no hardware key, then
1209 * let the frame through so the upper layers
1210 * can process it. This is necessary for 5210
1211 * parts which have no way to setup a ``clear''
1214 * XXX do key cache faulting
1216 if (rs.rs_keyix == AR5K_RXKEYIX_INVALID &&
1217 !(rs.rs_status & AR5K_RXERR_CRC))
1221 /* any other error, unhandled */
1222 DBG("ath5k: packet rx status %x\n", rs.rs_status);
1226 next_iob = ath5k_rx_iob_alloc(sc, &next_iob_addr);
1229 * If we can't replace bf->iob with a new iob under memory
1230 * pressure, just skip this packet
1233 DBG("ath5k: dropping packet under memory pressure\n");
1237 iob_put(iob, rs.rs_datalen);
1239 /* The MAC header is padded to have 32-bit boundary if the
1240 * packet payload is non-zero. However, iPXE only
1241 * supports standard 802.11 packets with 24-byte
1242 * header, so no padding correction should be needed.
1245 DBG2("ath5k: rx %d bytes, signal %d\n", rs.rs_datalen,
1248 net80211_rx(sc->dev, iob, rs.rs_rssi,
1249 ath5k_hw_rix_to_bitrate(rs.rs_rate));
1252 bf->iobaddr = next_iob_addr;
1254 list_del(&bf->list);
1255 list_add_tail(&bf->list, &sc->rxbuf);
1256 } while (ath5k_rxbuf_setup(sc, bf) == 0);
1267 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1269 struct ath5k_tx_status ts;
1270 struct ath5k_buf *bf, *bf0;
1271 struct ath5k_desc *ds;
1272 struct io_buffer *iob;
1275 memset(&ts, 0, sizeof(ts));
1277 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1280 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1282 if (ret != -EINPROGRESS) {
1283 DBG("ath5k: error in processing tx desc: %s\n",
1286 /* normal return, reached end of tx completions */
1294 DBG2("ath5k: tx %zd bytes complete, %d retries\n",
1295 iob_len(iob), ts.ts_retry[0]);
1297 net80211_tx_complete(sc->dev, iob, ts.ts_retry[0],
1298 ts.ts_status ? EIO : 0);
1300 list_del(&bf->list);
1301 list_add_tail(&bf->list, &sc->txbuf);
1305 if (list_empty(&txq->q))
1310 ath5k_handle_tx(struct ath5k_softc *sc)
1312 ath5k_tx_processq(sc, &sc->txq);
1316 /********************\
1317 * Interrupt handling *
1318 \********************/
1321 ath5k_irq(struct net80211_device *dev, int enable)
1323 struct ath5k_softc *sc = dev->priv;
1324 struct ath5k_hw *ah = sc->ah;
1326 sc->irq_ena = enable;
1327 ah->ah_ier = enable ? AR5K_IER_ENABLE : AR5K_IER_DISABLE;
1329 ath5k_hw_reg_write(ah, ah->ah_ier, AR5K_IER);
1330 ath5k_hw_set_imr(ah, sc->imask);
1334 ath5k_init(struct ath5k_softc *sc)
1336 struct ath5k_hw *ah = sc->ah;
1340 * Stop anything previously setup. This is safe
1341 * no matter this is the first time through or not.
1346 * The basic interface to setting the hardware in a good
1347 * state is ``reset''. On return the hardware is known to
1348 * be powered up and with interrupts disabled. This must
1349 * be followed by initialization of the appropriate bits
1350 * and then setup of the interrupt mask.
1352 sc->curchan = sc->dev->channels + sc->dev->channel;
1353 sc->curband = sc->curchan->band;
1354 sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
1355 AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
1356 AR5K_INT_FATAL | AR5K_INT_GLOBAL;
1357 ret = ath5k_reset(sc, NULL);
1361 ath5k_rfkill_hw_start(ah);
1364 * Reset the key cache since some parts do not reset the
1365 * contents on initial power up or resume from suspend.
1367 for (i = 0; i < AR5K_KEYTABLE_SIZE; i++)
1368 ath5k_hw_reset_key(ah, i);
1370 /* Set ack to be sent at low bit-rates */
1371 ath5k_hw_set_ack_bitrate_high(ah, 0);
1380 ath5k_stop_hw(struct ath5k_softc *sc)
1382 struct ath5k_hw *ah = sc->ah;
1385 * Shutdown the hardware and driver:
1386 * stop output from above
1387 * disable interrupts
1389 * turn off the radio
1390 * clear transmit machinery
1391 * clear receive machinery
1392 * drain and release tx queues
1393 * reclaim beacon resources
1394 * power down hardware
1396 * Note that some of this work is not possible if the
1397 * hardware is gone (invalid).
1400 if (!(sc->status & ATH_STAT_INVALID)) {
1401 ath5k_hw_set_imr(ah, 0);
1403 ath5k_txq_cleanup(sc);
1404 if (!(sc->status & ATH_STAT_INVALID)) {
1406 ath5k_hw_phy_disable(ah);
1410 ath5k_rfkill_hw_stop(sc->ah);
1416 ath5k_poll(struct net80211_device *dev)
1418 struct ath5k_softc *sc = dev->priv;
1419 struct ath5k_hw *ah = sc->ah;
1420 enum ath5k_int status;
1421 unsigned int counter = 1000;
1423 if (currticks() - sc->last_calib_ticks >
1424 ATH5K_CALIB_INTERVAL * ticks_per_sec()) {
1425 ath5k_calibrate(sc);
1426 sc->last_calib_ticks = currticks();
1429 if ((sc->status & ATH_STAT_INVALID) ||
1430 (sc->irq_ena && !ath5k_hw_is_intr_pending(ah)))
1434 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
1435 DBGP("ath5k: status %#x/%#x\n", status, sc->imask);
1436 if (status & AR5K_INT_FATAL) {
1438 * Fatal errors are unrecoverable.
1439 * Typically these are caused by DMA errors.
1441 DBG("ath5k: fatal error, resetting\n");
1442 ath5k_reset_wake(sc);
1443 } else if (status & AR5K_INT_RXORN) {
1444 DBG("ath5k: rx overrun, resetting\n");
1445 ath5k_reset_wake(sc);
1447 if (status & AR5K_INT_RXEOL) {
1449 * NB: the hardware should re-read the link when
1450 * RXE bit is written, but it doesn't work at
1451 * least on older hardware revs.
1453 DBG("ath5k: rx EOL\n");
1456 if (status & AR5K_INT_TXURN) {
1457 /* bump tx trigger level */
1458 DBG("ath5k: tx underrun\n");
1459 ath5k_hw_update_tx_triglevel(ah, 1);
1461 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
1462 ath5k_handle_rx(sc);
1463 if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
1464 | AR5K_INT_TXERR | AR5K_INT_TXEOL))
1465 ath5k_handle_tx(sc);
1467 } while (ath5k_hw_is_intr_pending(ah) && counter-- > 0);
1470 DBG("ath5k: too many interrupts, giving up for now\n");
1474 * Periodically recalibrate the PHY to account
1475 * for temperature/environment changes.
1478 ath5k_calibrate(struct ath5k_softc *sc)
1480 struct ath5k_hw *ah = sc->ah;
1482 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
1484 * Rfgain is out of bounds, reset the chip
1485 * to load new gain values.
1487 DBG("ath5k: resetting for calibration\n");
1488 ath5k_reset_wake(sc);
1490 if (ath5k_hw_phy_calibrate(ah, sc->curchan))
1491 DBG("ath5k: calibration of channel %d failed\n",
1492 sc->curchan->channel_nr);
1496 /********************\
1497 * Net80211 functions *
1498 \********************/
1501 ath5k_tx(struct net80211_device *dev, struct io_buffer *iob)
1503 struct ath5k_softc *sc = dev->priv;
1504 struct ath5k_buf *bf;
1508 * The hardware expects the header padded to 4 byte boundaries.
1509 * iPXE only ever sends 24-byte headers, so no action necessary.
1512 if (list_empty(&sc->txbuf)) {
1513 DBG("ath5k: dropping packet because no tx bufs available\n");
1517 bf = list_entry(sc->txbuf.next, struct ath5k_buf, list);
1518 list_del(&bf->list);
1523 if ((rc = ath5k_txbuf_setup(sc, bf)) != 0) {
1525 list_add_tail(&bf->list, &sc->txbuf);
1533 * Reset the hardware. If chan is not NULL, then also pause rx/tx
1534 * and change to the given channel.
1537 ath5k_reset(struct ath5k_softc *sc, struct net80211_channel *chan)
1539 struct ath5k_hw *ah = sc->ah;
1543 ath5k_hw_set_imr(ah, 0);
1544 ath5k_txq_cleanup(sc);
1548 sc->curband = chan->band;
1551 ret = ath5k_hw_reset(ah, sc->curchan, 1);
1553 DBG("ath5k: can't reset hardware: %s\n", strerror(ret));
1557 ret = ath5k_rx_start(sc);
1559 DBG("ath5k: can't start rx logic: %s\n", strerror(ret));
1564 * Change channels and update the h/w rate map if we're switching;
1565 * e.g. 11a to 11b/g.
1567 * We may be doing a reset in response to an ioctl that changes the
1568 * channel so update any state that might change as a result.
1572 /* ath5k_chan_change(sc, c); */
1574 /* Reenable interrupts if necessary */
1575 ath5k_irq(sc->dev, sc->irq_ena);
1580 static int ath5k_reset_wake(struct ath5k_softc *sc)
1582 return ath5k_reset(sc, sc->curchan);
1585 static int ath5k_start(struct net80211_device *dev)
1587 struct ath5k_softc *sc = dev->priv;
1590 if ((ret = ath5k_init(sc)) != 0)
1594 ath5k_configure_filter(sc);
1595 ath5k_hw_set_lladdr(sc->ah, dev->netdev->ll_addr);
1600 static void ath5k_stop(struct net80211_device *dev)
1602 struct ath5k_softc *sc = dev->priv;
1603 u8 mac[ETH_ALEN] = {};
1605 ath5k_hw_set_lladdr(sc->ah, mac);
1611 ath5k_config(struct net80211_device *dev, int changed)
1613 struct ath5k_softc *sc = dev->priv;
1614 struct ath5k_hw *ah = sc->ah;
1615 struct net80211_channel *chan = &dev->channels[dev->channel];
1618 if (changed & NET80211_CFG_CHANNEL) {
1619 sc->power_level = chan->maxpower;
1620 if ((ret = ath5k_chan_set(sc, chan)) != 0)
1624 if ((changed & NET80211_CFG_RATE) ||
1625 (changed & NET80211_CFG_PHY_PARAMS)) {
1626 int spmbl = ATH5K_SPMBL_NO;
1627 u16 rate = dev->rates[dev->rate];
1628 u16 slowrate = dev->rates[dev->rtscts_rate];
1631 if (dev->phy_flags & NET80211_PHY_USE_SHORT_PREAMBLE)
1632 spmbl = ATH5K_SPMBL_YES;
1634 for (i = 0; i < ATH5K_NR_RATES; i++) {
1635 if (ath5k_rates[i].bitrate == rate &&
1636 (ath5k_rates[i].short_pmbl & spmbl))
1637 sc->hw_rate = ath5k_rates[i].hw_code;
1639 if (ath5k_rates[i].bitrate == slowrate &&
1640 (ath5k_rates[i].short_pmbl & spmbl))
1641 sc->hw_rtscts_rate = ath5k_rates[i].hw_code;
1645 if (changed & NET80211_CFG_ASSOC) {
1646 sc->assoc = !!(dev->state & NET80211_ASSOCIATED);
1648 memcpy(ah->ah_bssid, dev->bssid, ETH_ALEN);
1650 memset(ah->ah_bssid, 0xff, ETH_ALEN);
1652 ath5k_hw_set_associd(ah, ah->ah_bssid, 0);
1659 * o always accept unicast, broadcast, and multicast traffic
1660 * o multicast traffic for all BSSIDs will be enabled if mac80211
1662 * o maintain current state of phy ofdm or phy cck error reception.
1663 * If the hardware detects any of these type of errors then
1664 * ath5k_hw_get_rx_filter() will pass to us the respective
1665 * hardware filters to be able to receive these type of frames.
1666 * o probe request frames are accepted only when operating in
1667 * hostap, adhoc, or monitor modes
1668 * o enable promiscuous mode according to the interface state
1670 * - when operating in adhoc mode so the 802.11 layer creates
1671 * node table entries for peers,
1672 * - when operating in station mode for collecting rssi data when
1673 * the station is otherwise quiet, or
1676 static void ath5k_configure_filter(struct ath5k_softc *sc)
1678 struct ath5k_hw *ah = sc->ah;
1679 u32 mfilt[2], rfilt;
1681 /* Enable all multicast */
1685 /* Enable data frames and beacons */
1686 rfilt = (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
1687 AR5K_RX_FILTER_MCAST | AR5K_RX_FILTER_BEACON);
1690 ath5k_hw_set_rx_filter(ah, rfilt);
1692 /* Set multicast bits */
1693 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
1695 /* Set the cached hw filter flags, this will alter actually
1697 sc->filter_flags = rfilt;