1
2 /*
3 * Linux device driver for ADMtek ADM8211 (IEEE 802.11b MAC/BBP)
4 *
5 * Copyright (c) 2003, Jouni Malinen <j@w1.fi>
6 * Copyright (c) 2004-2007, Michael Wu <flamingice@sourmilk.net>
7 * Some parts copyright (c) 2003 by David Young <dyoung@pobox.com>
8 * and used with permission.
9 *
10 * Much thanks to Infineon-ADMtek for their support of this driver.
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation. See README and COPYING for
15 * more details.
16 */
17
18 #include <linux/init.h>
19 #include <linux/interrupt.h>
20 #include <linux/if.h>
21 #include <linux/skbuff.h>
22 #include <linux/slab.h>
23 #include <linux/etherdevice.h>
24 #include <linux/pci.h>
25 #include <linux/delay.h>
26 #include <linux/crc32.h>
27 #include <linux/eeprom_93cx6.h>
28 #include <linux/module.h>
29 #include <net/mac80211.h>
30
31 #include "adm8211.h"
32
33 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
34 MODULE_AUTHOR("Jouni Malinen <j@w1.fi>");
35 MODULE_DESCRIPTION("Driver for IEEE 802.11b wireless cards based on ADMtek ADM8211");
36 MODULE_SUPPORTED_DEVICE("ADM8211");
37 MODULE_LICENSE("GPL");
38
39 static unsigned int tx_ring_size __read_mostly = 16;
40 static unsigned int rx_ring_size __read_mostly = 16;
41
42 module_param(tx_ring_size, uint, 0);
43 module_param(rx_ring_size, uint, 0);
44
45 static DEFINE_PCI_DEVICE_TABLE(adm8211_pci_id_table) = {
46 /* ADMtek ADM8211 */
47 { PCI_DEVICE(0x10B7, 0x6000) }, /* 3Com 3CRSHPW796 */
48 { PCI_DEVICE(0x1200, 0x8201) }, /* ? */
49 { PCI_DEVICE(0x1317, 0x8201) }, /* ADM8211A */
50 { PCI_DEVICE(0x1317, 0x8211) }, /* ADM8211B/C */
51 { 0 }
52 };
53
54 static struct ieee80211_rate adm8211_rates[] = {
55 { .bitrate = 10, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
56 { .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
57 { .bitrate = 55, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
58 { .bitrate = 110, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
59 { .bitrate = 220, .flags = IEEE80211_RATE_SHORT_PREAMBLE }, /* XX ?? */
60 };
61
62 static const struct ieee80211_channel adm8211_channels[] = {
63 { .center_freq = 2412},
64 { .center_freq = 2417},
65 { .center_freq = 2422},
66 { .center_freq = 2427},
67 { .center_freq = 2432},
68 { .center_freq = 2437},
69 { .center_freq = 2442},
70 { .center_freq = 2447},
71 { .center_freq = 2452},
72 { .center_freq = 2457},
73 { .center_freq = 2462},
74 { .center_freq = 2467},
75 { .center_freq = 2472},
76 { .center_freq = 2484},
77 };
78
79
adm8211_eeprom_register_read(struct eeprom_93cx6 * eeprom)80 static void adm8211_eeprom_register_read(struct eeprom_93cx6 *eeprom)
81 {
82 struct adm8211_priv *priv = eeprom->data;
83 u32 reg = ADM8211_CSR_READ(SPR);
84
85 eeprom->reg_data_in = reg & ADM8211_SPR_SDI;
86 eeprom->reg_data_out = reg & ADM8211_SPR_SDO;
87 eeprom->reg_data_clock = reg & ADM8211_SPR_SCLK;
88 eeprom->reg_chip_select = reg & ADM8211_SPR_SCS;
89 }
90
adm8211_eeprom_register_write(struct eeprom_93cx6 * eeprom)91 static void adm8211_eeprom_register_write(struct eeprom_93cx6 *eeprom)
92 {
93 struct adm8211_priv *priv = eeprom->data;
94 u32 reg = 0x4000 | ADM8211_SPR_SRS;
95
96 if (eeprom->reg_data_in)
97 reg |= ADM8211_SPR_SDI;
98 if (eeprom->reg_data_out)
99 reg |= ADM8211_SPR_SDO;
100 if (eeprom->reg_data_clock)
101 reg |= ADM8211_SPR_SCLK;
102 if (eeprom->reg_chip_select)
103 reg |= ADM8211_SPR_SCS;
104
105 ADM8211_CSR_WRITE(SPR, reg);
106 ADM8211_CSR_READ(SPR); /* eeprom_delay */
107 }
108
adm8211_read_eeprom(struct ieee80211_hw * dev)109 static int adm8211_read_eeprom(struct ieee80211_hw *dev)
110 {
111 struct adm8211_priv *priv = dev->priv;
112 unsigned int words, i;
113 struct ieee80211_chan_range chan_range;
114 u16 cr49;
115 struct eeprom_93cx6 eeprom = {
116 .data = priv,
117 .register_read = adm8211_eeprom_register_read,
118 .register_write = adm8211_eeprom_register_write
119 };
120
121 if (ADM8211_CSR_READ(CSR_TEST0) & ADM8211_CSR_TEST0_EPTYP) {
122 /* 256 * 16-bit = 512 bytes */
123 eeprom.width = PCI_EEPROM_WIDTH_93C66;
124 words = 256;
125 } else {
126 /* 64 * 16-bit = 128 bytes */
127 eeprom.width = PCI_EEPROM_WIDTH_93C46;
128 words = 64;
129 }
130
131 priv->eeprom_len = words * 2;
132 priv->eeprom = kmalloc(priv->eeprom_len, GFP_KERNEL);
133 if (!priv->eeprom)
134 return -ENOMEM;
135
136 eeprom_93cx6_multiread(&eeprom, 0, (__le16 *)priv->eeprom, words);
137
138 cr49 = le16_to_cpu(priv->eeprom->cr49);
139 priv->rf_type = (cr49 >> 3) & 0x7;
140 switch (priv->rf_type) {
141 case ADM8211_TYPE_INTERSIL:
142 case ADM8211_TYPE_RFMD:
143 case ADM8211_TYPE_MARVEL:
144 case ADM8211_TYPE_AIROHA:
145 case ADM8211_TYPE_ADMTEK:
146 break;
147
148 default:
149 if (priv->pdev->revision < ADM8211_REV_CA)
150 priv->rf_type = ADM8211_TYPE_RFMD;
151 else
152 priv->rf_type = ADM8211_TYPE_AIROHA;
153
154 printk(KERN_WARNING "%s (adm8211): Unknown RFtype %d\n",
155 pci_name(priv->pdev), (cr49 >> 3) & 0x7);
156 }
157
158 priv->bbp_type = cr49 & 0x7;
159 switch (priv->bbp_type) {
160 case ADM8211_TYPE_INTERSIL:
161 case ADM8211_TYPE_RFMD:
162 case ADM8211_TYPE_MARVEL:
163 case ADM8211_TYPE_AIROHA:
164 case ADM8211_TYPE_ADMTEK:
165 break;
166 default:
167 if (priv->pdev->revision < ADM8211_REV_CA)
168 priv->bbp_type = ADM8211_TYPE_RFMD;
169 else
170 priv->bbp_type = ADM8211_TYPE_ADMTEK;
171
172 printk(KERN_WARNING "%s (adm8211): Unknown BBPtype: %d\n",
173 pci_name(priv->pdev), cr49 >> 3);
174 }
175
176 if (priv->eeprom->country_code >= ARRAY_SIZE(cranges)) {
177 printk(KERN_WARNING "%s (adm8211): Invalid country code (%d)\n",
178 pci_name(priv->pdev), priv->eeprom->country_code);
179
180 chan_range = cranges[2];
181 } else
182 chan_range = cranges[priv->eeprom->country_code];
183
184 printk(KERN_DEBUG "%s (adm8211): Channel range: %d - %d\n",
185 pci_name(priv->pdev), (int)chan_range.min, (int)chan_range.max);
186
187 BUILD_BUG_ON(sizeof(priv->channels) != sizeof(adm8211_channels));
188
189 memcpy(priv->channels, adm8211_channels, sizeof(priv->channels));
190 priv->band.channels = priv->channels;
191 priv->band.n_channels = ARRAY_SIZE(adm8211_channels);
192 priv->band.bitrates = adm8211_rates;
193 priv->band.n_bitrates = ARRAY_SIZE(adm8211_rates);
194
195 for (i = 1; i <= ARRAY_SIZE(adm8211_channels); i++)
196 if (i < chan_range.min || i > chan_range.max)
197 priv->channels[i - 1].flags |= IEEE80211_CHAN_DISABLED;
198
199 switch (priv->eeprom->specific_bbptype) {
200 case ADM8211_BBP_RFMD3000:
201 case ADM8211_BBP_RFMD3002:
202 case ADM8211_BBP_ADM8011:
203 priv->specific_bbptype = priv->eeprom->specific_bbptype;
204 break;
205
206 default:
207 if (priv->pdev->revision < ADM8211_REV_CA)
208 priv->specific_bbptype = ADM8211_BBP_RFMD3000;
209 else
210 priv->specific_bbptype = ADM8211_BBP_ADM8011;
211
212 printk(KERN_WARNING "%s (adm8211): Unknown specific BBP: %d\n",
213 pci_name(priv->pdev), priv->eeprom->specific_bbptype);
214 }
215
216 switch (priv->eeprom->specific_rftype) {
217 case ADM8211_RFMD2948:
218 case ADM8211_RFMD2958:
219 case ADM8211_RFMD2958_RF3000_CONTROL_POWER:
220 case ADM8211_MAX2820:
221 case ADM8211_AL2210L:
222 priv->transceiver_type = priv->eeprom->specific_rftype;
223 break;
224
225 default:
226 if (priv->pdev->revision == ADM8211_REV_BA)
227 priv->transceiver_type = ADM8211_RFMD2958_RF3000_CONTROL_POWER;
228 else if (priv->pdev->revision == ADM8211_REV_CA)
229 priv->transceiver_type = ADM8211_AL2210L;
230 else if (priv->pdev->revision == ADM8211_REV_AB)
231 priv->transceiver_type = ADM8211_RFMD2948;
232
233 printk(KERN_WARNING "%s (adm8211): Unknown transceiver: %d\n",
234 pci_name(priv->pdev), priv->eeprom->specific_rftype);
235
236 break;
237 }
238
239 printk(KERN_DEBUG "%s (adm8211): RFtype=%d BBPtype=%d Specific BBP=%d "
240 "Transceiver=%d\n", pci_name(priv->pdev), priv->rf_type,
241 priv->bbp_type, priv->specific_bbptype, priv->transceiver_type);
242
243 return 0;
244 }
245
adm8211_write_sram(struct ieee80211_hw * dev,u32 addr,u32 data)246 static inline void adm8211_write_sram(struct ieee80211_hw *dev,
247 u32 addr, u32 data)
248 {
249 struct adm8211_priv *priv = dev->priv;
250
251 ADM8211_CSR_WRITE(WEPCTL, addr | ADM8211_WEPCTL_TABLE_WR |
252 (priv->pdev->revision < ADM8211_REV_BA ?
253 0 : ADM8211_WEPCTL_SEL_WEPTABLE ));
254 ADM8211_CSR_READ(WEPCTL);
255 msleep(1);
256
257 ADM8211_CSR_WRITE(WESK, data);
258 ADM8211_CSR_READ(WESK);
259 msleep(1);
260 }
261
adm8211_write_sram_bytes(struct ieee80211_hw * dev,unsigned int addr,u8 * buf,unsigned int len)262 static void adm8211_write_sram_bytes(struct ieee80211_hw *dev,
263 unsigned int addr, u8 *buf,
264 unsigned int len)
265 {
266 struct adm8211_priv *priv = dev->priv;
267 u32 reg = ADM8211_CSR_READ(WEPCTL);
268 unsigned int i;
269
270 if (priv->pdev->revision < ADM8211_REV_BA) {
271 for (i = 0; i < len; i += 2) {
272 u16 val = buf[i] | (buf[i + 1] << 8);
273 adm8211_write_sram(dev, addr + i / 2, val);
274 }
275 } else {
276 for (i = 0; i < len; i += 4) {
277 u32 val = (buf[i + 0] << 0 ) | (buf[i + 1] << 8 ) |
278 (buf[i + 2] << 16) | (buf[i + 3] << 24);
279 adm8211_write_sram(dev, addr + i / 4, val);
280 }
281 }
282
283 ADM8211_CSR_WRITE(WEPCTL, reg);
284 }
285
adm8211_clear_sram(struct ieee80211_hw * dev)286 static void adm8211_clear_sram(struct ieee80211_hw *dev)
287 {
288 struct adm8211_priv *priv = dev->priv;
289 u32 reg = ADM8211_CSR_READ(WEPCTL);
290 unsigned int addr;
291
292 for (addr = 0; addr < ADM8211_SRAM_SIZE; addr++)
293 adm8211_write_sram(dev, addr, 0);
294
295 ADM8211_CSR_WRITE(WEPCTL, reg);
296 }
297
adm8211_get_stats(struct ieee80211_hw * dev,struct ieee80211_low_level_stats * stats)298 static int adm8211_get_stats(struct ieee80211_hw *dev,
299 struct ieee80211_low_level_stats *stats)
300 {
301 struct adm8211_priv *priv = dev->priv;
302
303 memcpy(stats, &priv->stats, sizeof(*stats));
304
305 return 0;
306 }
307
adm8211_interrupt_tci(struct ieee80211_hw * dev)308 static void adm8211_interrupt_tci(struct ieee80211_hw *dev)
309 {
310 struct adm8211_priv *priv = dev->priv;
311 unsigned int dirty_tx;
312
313 spin_lock(&priv->lock);
314
315 for (dirty_tx = priv->dirty_tx; priv->cur_tx - dirty_tx; dirty_tx++) {
316 unsigned int entry = dirty_tx % priv->tx_ring_size;
317 u32 status = le32_to_cpu(priv->tx_ring[entry].status);
318 struct ieee80211_tx_info *txi;
319 struct adm8211_tx_ring_info *info;
320 struct sk_buff *skb;
321
322 if (status & TDES0_CONTROL_OWN ||
323 !(status & TDES0_CONTROL_DONE))
324 break;
325
326 info = &priv->tx_buffers[entry];
327 skb = info->skb;
328 txi = IEEE80211_SKB_CB(skb);
329
330 /* TODO: check TDES0_STATUS_TUF and TDES0_STATUS_TRO */
331
332 pci_unmap_single(priv->pdev, info->mapping,
333 info->skb->len, PCI_DMA_TODEVICE);
334
335 ieee80211_tx_info_clear_status(txi);
336
337 skb_pull(skb, sizeof(struct adm8211_tx_hdr));
338 memcpy(skb_push(skb, info->hdrlen), skb->cb, info->hdrlen);
339 if (!(txi->flags & IEEE80211_TX_CTL_NO_ACK) &&
340 !(status & TDES0_STATUS_ES))
341 txi->flags |= IEEE80211_TX_STAT_ACK;
342
343 ieee80211_tx_status_irqsafe(dev, skb);
344
345 info->skb = NULL;
346 }
347
348 if (priv->cur_tx - dirty_tx < priv->tx_ring_size - 2)
349 ieee80211_wake_queue(dev, 0);
350
351 priv->dirty_tx = dirty_tx;
352 spin_unlock(&priv->lock);
353 }
354
355
adm8211_interrupt_rci(struct ieee80211_hw * dev)356 static void adm8211_interrupt_rci(struct ieee80211_hw *dev)
357 {
358 struct adm8211_priv *priv = dev->priv;
359 unsigned int entry = priv->cur_rx % priv->rx_ring_size;
360 u32 status;
361 unsigned int pktlen;
362 struct sk_buff *skb, *newskb;
363 unsigned int limit = priv->rx_ring_size;
364 u8 rssi, rate;
365
366 while (!(priv->rx_ring[entry].status & cpu_to_le32(RDES0_STATUS_OWN))) {
367 if (!limit--)
368 break;
369
370 status = le32_to_cpu(priv->rx_ring[entry].status);
371 rate = (status & RDES0_STATUS_RXDR) >> 12;
372 rssi = le32_to_cpu(priv->rx_ring[entry].length) &
373 RDES1_STATUS_RSSI;
374
375 pktlen = status & RDES0_STATUS_FL;
376 if (pktlen > RX_PKT_SIZE) {
377 if (net_ratelimit())
378 wiphy_debug(dev->wiphy, "frame too long (%d)\n",
379 pktlen);
380 pktlen = RX_PKT_SIZE;
381 }
382
383 if (!priv->soft_rx_crc && status & RDES0_STATUS_ES) {
384 skb = NULL; /* old buffer will be reused */
385 /* TODO: update RX error stats */
386 /* TODO: check RDES0_STATUS_CRC*E */
387 } else if (pktlen < RX_COPY_BREAK) {
388 skb = dev_alloc_skb(pktlen);
389 if (skb) {
390 pci_dma_sync_single_for_cpu(
391 priv->pdev,
392 priv->rx_buffers[entry].mapping,
393 pktlen, PCI_DMA_FROMDEVICE);
394 memcpy(skb_put(skb, pktlen),
395 skb_tail_pointer(priv->rx_buffers[entry].skb),
396 pktlen);
397 pci_dma_sync_single_for_device(
398 priv->pdev,
399 priv->rx_buffers[entry].mapping,
400 RX_PKT_SIZE, PCI_DMA_FROMDEVICE);
401 }
402 } else {
403 newskb = dev_alloc_skb(RX_PKT_SIZE);
404 if (newskb) {
405 skb = priv->rx_buffers[entry].skb;
406 skb_put(skb, pktlen);
407 pci_unmap_single(
408 priv->pdev,
409 priv->rx_buffers[entry].mapping,
410 RX_PKT_SIZE, PCI_DMA_FROMDEVICE);
411 priv->rx_buffers[entry].skb = newskb;
412 priv->rx_buffers[entry].mapping =
413 pci_map_single(priv->pdev,
414 skb_tail_pointer(newskb),
415 RX_PKT_SIZE,
416 PCI_DMA_FROMDEVICE);
417 } else {
418 skb = NULL;
419 /* TODO: update rx dropped stats */
420 }
421
422 priv->rx_ring[entry].buffer1 =
423 cpu_to_le32(priv->rx_buffers[entry].mapping);
424 }
425
426 priv->rx_ring[entry].status = cpu_to_le32(RDES0_STATUS_OWN |
427 RDES0_STATUS_SQL);
428 priv->rx_ring[entry].length =
429 cpu_to_le32(RX_PKT_SIZE |
430 (entry == priv->rx_ring_size - 1 ?
431 RDES1_CONTROL_RER : 0));
432
433 if (skb) {
434 struct ieee80211_rx_status rx_status = {0};
435
436 if (priv->pdev->revision < ADM8211_REV_CA)
437 rx_status.signal = rssi;
438 else
439 rx_status.signal = 100 - rssi;
440
441 rx_status.rate_idx = rate;
442
443 rx_status.freq = adm8211_channels[priv->channel - 1].center_freq;
444 rx_status.band = IEEE80211_BAND_2GHZ;
445
446 memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
447 ieee80211_rx_irqsafe(dev, skb);
448 }
449
450 entry = (++priv->cur_rx) % priv->rx_ring_size;
451 }
452
453 /* TODO: check LPC and update stats? */
454 }
455
456
adm8211_interrupt(int irq,void * dev_id)457 static irqreturn_t adm8211_interrupt(int irq, void *dev_id)
458 {
459 #define ADM8211_INT(x) \
460 do { \
461 if (unlikely(stsr & ADM8211_STSR_ ## x)) \
462 wiphy_debug(dev->wiphy, "%s\n", #x); \
463 } while (0)
464
465 struct ieee80211_hw *dev = dev_id;
466 struct adm8211_priv *priv = dev->priv;
467 u32 stsr = ADM8211_CSR_READ(STSR);
468 ADM8211_CSR_WRITE(STSR, stsr);
469 if (stsr == 0xffffffff)
470 return IRQ_HANDLED;
471
472 if (!(stsr & (ADM8211_STSR_NISS | ADM8211_STSR_AISS)))
473 return IRQ_HANDLED;
474
475 if (stsr & ADM8211_STSR_RCI)
476 adm8211_interrupt_rci(dev);
477 if (stsr & ADM8211_STSR_TCI)
478 adm8211_interrupt_tci(dev);
479
480 ADM8211_INT(PCF);
481 ADM8211_INT(BCNTC);
482 ADM8211_INT(GPINT);
483 ADM8211_INT(ATIMTC);
484 ADM8211_INT(TSFTF);
485 ADM8211_INT(TSCZ);
486 ADM8211_INT(SQL);
487 ADM8211_INT(WEPTD);
488 ADM8211_INT(ATIME);
489 ADM8211_INT(TEIS);
490 ADM8211_INT(FBE);
491 ADM8211_INT(REIS);
492 ADM8211_INT(GPTT);
493 ADM8211_INT(RPS);
494 ADM8211_INT(RDU);
495 ADM8211_INT(TUF);
496 ADM8211_INT(TPS);
497
498 return IRQ_HANDLED;
499
500 #undef ADM8211_INT
501 }
502
503 #define WRITE_SYN(name,v_mask,v_shift,a_mask,a_shift,bits,prewrite,postwrite)\
504 static void adm8211_rf_write_syn_ ## name (struct ieee80211_hw *dev, \
505 u16 addr, u32 value) { \
506 struct adm8211_priv *priv = dev->priv; \
507 unsigned int i; \
508 u32 reg, bitbuf; \
509 \
510 value &= v_mask; \
511 addr &= a_mask; \
512 bitbuf = (value << v_shift) | (addr << a_shift); \
513 \
514 ADM8211_CSR_WRITE(SYNRF, ADM8211_SYNRF_IF_SELECT_1); \
515 ADM8211_CSR_READ(SYNRF); \
516 ADM8211_CSR_WRITE(SYNRF, ADM8211_SYNRF_IF_SELECT_0); \
517 ADM8211_CSR_READ(SYNRF); \
518 \
519 if (prewrite) { \
520 ADM8211_CSR_WRITE(SYNRF, ADM8211_SYNRF_WRITE_SYNDATA_0); \
521 ADM8211_CSR_READ(SYNRF); \
522 } \
523 \
524 for (i = 0; i <= bits; i++) { \
525 if (bitbuf & (1 << (bits - i))) \
526 reg = ADM8211_SYNRF_WRITE_SYNDATA_1; \
527 else \
528 reg = ADM8211_SYNRF_WRITE_SYNDATA_0; \
529 \
530 ADM8211_CSR_WRITE(SYNRF, reg); \
531 ADM8211_CSR_READ(SYNRF); \
532 \
533 ADM8211_CSR_WRITE(SYNRF, reg | ADM8211_SYNRF_WRITE_CLOCK_1); \
534 ADM8211_CSR_READ(SYNRF); \
535 ADM8211_CSR_WRITE(SYNRF, reg | ADM8211_SYNRF_WRITE_CLOCK_0); \
536 ADM8211_CSR_READ(SYNRF); \
537 } \
538 \
539 if (postwrite == 1) { \
540 ADM8211_CSR_WRITE(SYNRF, reg | ADM8211_SYNRF_IF_SELECT_0); \
541 ADM8211_CSR_READ(SYNRF); \
542 } \
543 if (postwrite == 2) { \
544 ADM8211_CSR_WRITE(SYNRF, reg | ADM8211_SYNRF_IF_SELECT_1); \
545 ADM8211_CSR_READ(SYNRF); \
546 } \
547 \
548 ADM8211_CSR_WRITE(SYNRF, 0); \
549 ADM8211_CSR_READ(SYNRF); \
550 }
551
552 WRITE_SYN(max2820, 0x00FFF, 0, 0x0F, 12, 15, 1, 1)
553 WRITE_SYN(al2210l, 0xFFFFF, 4, 0x0F, 0, 23, 1, 1)
554 WRITE_SYN(rfmd2958, 0x3FFFF, 0, 0x1F, 18, 23, 0, 1)
555 WRITE_SYN(rfmd2948, 0x0FFFF, 4, 0x0F, 0, 21, 0, 2)
556
557 #undef WRITE_SYN
558
adm8211_write_bbp(struct ieee80211_hw * dev,u8 addr,u8 data)559 static int adm8211_write_bbp(struct ieee80211_hw *dev, u8 addr, u8 data)
560 {
561 struct adm8211_priv *priv = dev->priv;
562 unsigned int timeout;
563 u32 reg;
564
565 timeout = 10;
566 while (timeout > 0) {
567 reg = ADM8211_CSR_READ(BBPCTL);
568 if (!(reg & (ADM8211_BBPCTL_WR | ADM8211_BBPCTL_RD)))
569 break;
570 timeout--;
571 msleep(2);
572 }
573
574 if (timeout == 0) {
575 wiphy_debug(dev->wiphy,
576 "adm8211_write_bbp(%d,%d) failed prewrite (reg=0x%08x)\n",
577 addr, data, reg);
578 return -ETIMEDOUT;
579 }
580
581 switch (priv->bbp_type) {
582 case ADM8211_TYPE_INTERSIL:
583 reg = ADM8211_BBPCTL_MMISEL; /* three wire interface */
584 break;
585 case ADM8211_TYPE_RFMD:
586 reg = (0x20 << 24) | ADM8211_BBPCTL_TXCE | ADM8211_BBPCTL_CCAP |
587 (0x01 << 18);
588 break;
589 case ADM8211_TYPE_ADMTEK:
590 reg = (0x20 << 24) | ADM8211_BBPCTL_TXCE | ADM8211_BBPCTL_CCAP |
591 (0x05 << 18);
592 break;
593 }
594 reg |= ADM8211_BBPCTL_WR | (addr << 8) | data;
595
596 ADM8211_CSR_WRITE(BBPCTL, reg);
597
598 timeout = 10;
599 while (timeout > 0) {
600 reg = ADM8211_CSR_READ(BBPCTL);
601 if (!(reg & ADM8211_BBPCTL_WR))
602 break;
603 timeout--;
604 msleep(2);
605 }
606
607 if (timeout == 0) {
608 ADM8211_CSR_WRITE(BBPCTL, ADM8211_CSR_READ(BBPCTL) &
609 ~ADM8211_BBPCTL_WR);
610 wiphy_debug(dev->wiphy,
611 "adm8211_write_bbp(%d,%d) failed postwrite (reg=0x%08x)\n",
612 addr, data, reg);
613 return -ETIMEDOUT;
614 }
615
616 return 0;
617 }
618
adm8211_rf_set_channel(struct ieee80211_hw * dev,unsigned int chan)619 static int adm8211_rf_set_channel(struct ieee80211_hw *dev, unsigned int chan)
620 {
621 static const u32 adm8211_rfmd2958_reg5[] =
622 {0x22BD, 0x22D2, 0x22E8, 0x22FE, 0x2314, 0x232A, 0x2340,
623 0x2355, 0x236B, 0x2381, 0x2397, 0x23AD, 0x23C2, 0x23F7};
624 static const u32 adm8211_rfmd2958_reg6[] =
625 {0x05D17, 0x3A2E8, 0x2E8BA, 0x22E8B, 0x1745D, 0x0BA2E, 0x00000,
626 0x345D1, 0x28BA2, 0x1D174, 0x11745, 0x05D17, 0x3A2E8, 0x11745};
627
628 struct adm8211_priv *priv = dev->priv;
629 u8 ant_power = priv->ant_power > 0x3F ?
630 priv->eeprom->antenna_power[chan - 1] : priv->ant_power;
631 u8 tx_power = priv->tx_power > 0x3F ?
632 priv->eeprom->tx_power[chan - 1] : priv->tx_power;
633 u8 lpf_cutoff = priv->lpf_cutoff == 0xFF ?
634 priv->eeprom->lpf_cutoff[chan - 1] : priv->lpf_cutoff;
635 u8 lnags_thresh = priv->lnags_threshold == 0xFF ?
636 priv->eeprom->lnags_threshold[chan - 1] : priv->lnags_threshold;
637 u32 reg;
638
639 ADM8211_IDLE();
640
641 /* Program synthesizer to new channel */
642 switch (priv->transceiver_type) {
643 case ADM8211_RFMD2958:
644 case ADM8211_RFMD2958_RF3000_CONTROL_POWER:
645 adm8211_rf_write_syn_rfmd2958(dev, 0x00, 0x04007);
646 adm8211_rf_write_syn_rfmd2958(dev, 0x02, 0x00033);
647
648 adm8211_rf_write_syn_rfmd2958(dev, 0x05,
649 adm8211_rfmd2958_reg5[chan - 1]);
650 adm8211_rf_write_syn_rfmd2958(dev, 0x06,
651 adm8211_rfmd2958_reg6[chan - 1]);
652 break;
653
654 case ADM8211_RFMD2948:
655 adm8211_rf_write_syn_rfmd2948(dev, SI4126_MAIN_CONF,
656 SI4126_MAIN_XINDIV2);
657 adm8211_rf_write_syn_rfmd2948(dev, SI4126_POWERDOWN,
658 SI4126_POWERDOWN_PDIB |
659 SI4126_POWERDOWN_PDRB);
660 adm8211_rf_write_syn_rfmd2948(dev, SI4126_PHASE_DET_GAIN, 0);
661 adm8211_rf_write_syn_rfmd2948(dev, SI4126_RF2_N_DIV,
662 (chan == 14 ?
663 2110 : (2033 + (chan * 5))));
664 adm8211_rf_write_syn_rfmd2948(dev, SI4126_IF_N_DIV, 1496);
665 adm8211_rf_write_syn_rfmd2948(dev, SI4126_RF2_R_DIV, 44);
666 adm8211_rf_write_syn_rfmd2948(dev, SI4126_IF_R_DIV, 44);
667 break;
668
669 case ADM8211_MAX2820:
670 adm8211_rf_write_syn_max2820(dev, 0x3,
671 (chan == 14 ? 0x054 : (0x7 + (chan * 5))));
672 break;
673
674 case ADM8211_AL2210L:
675 adm8211_rf_write_syn_al2210l(dev, 0x0,
676 (chan == 14 ? 0x229B4 : (0x22967 + (chan * 5))));
677 break;
678
679 default:
680 wiphy_debug(dev->wiphy, "unsupported transceiver type %d\n",
681 priv->transceiver_type);
682 break;
683 }
684
685 /* write BBP regs */
686 if (priv->bbp_type == ADM8211_TYPE_RFMD) {
687
688 /* SMC 2635W specific? adm8211b doesn't use the 2948 though.. */
689 /* TODO: remove if SMC 2635W doesn't need this */
690 if (priv->transceiver_type == ADM8211_RFMD2948) {
691 reg = ADM8211_CSR_READ(GPIO);
692 reg &= 0xfffc0000;
693 reg |= ADM8211_CSR_GPIO_EN0;
694 if (chan != 14)
695 reg |= ADM8211_CSR_GPIO_O0;
696 ADM8211_CSR_WRITE(GPIO, reg);
697 }
698
699 if (priv->transceiver_type == ADM8211_RFMD2958) {
700 /* set PCNT2 */
701 adm8211_rf_write_syn_rfmd2958(dev, 0x0B, 0x07100);
702 /* set PCNT1 P_DESIRED/MID_BIAS */
703 reg = le16_to_cpu(priv->eeprom->cr49);
704 reg >>= 13;
705 reg <<= 15;
706 reg |= ant_power << 9;
707 adm8211_rf_write_syn_rfmd2958(dev, 0x0A, reg);
708 /* set TXRX TX_GAIN */
709 adm8211_rf_write_syn_rfmd2958(dev, 0x09, 0x00050 |
710 (priv->pdev->revision < ADM8211_REV_CA ? tx_power : 0));
711 } else {
712 reg = ADM8211_CSR_READ(PLCPHD);
713 reg &= 0xff00ffff;
714 reg |= tx_power << 18;
715 ADM8211_CSR_WRITE(PLCPHD, reg);
716 }
717
718 ADM8211_CSR_WRITE(SYNRF, ADM8211_SYNRF_SELRF |
719 ADM8211_SYNRF_PE1 | ADM8211_SYNRF_PHYRST);
720 ADM8211_CSR_READ(SYNRF);
721 msleep(30);
722
723 /* RF3000 BBP */
724 if (priv->transceiver_type != ADM8211_RFMD2958)
725 adm8211_write_bbp(dev, RF3000_TX_VAR_GAIN__TX_LEN_EXT,
726 tx_power<<2);
727 adm8211_write_bbp(dev, RF3000_LOW_GAIN_CALIB, lpf_cutoff);
728 adm8211_write_bbp(dev, RF3000_HIGH_GAIN_CALIB, lnags_thresh);
729 adm8211_write_bbp(dev, 0x1c, priv->pdev->revision == ADM8211_REV_BA ?
730 priv->eeprom->cr28 : 0);
731 adm8211_write_bbp(dev, 0x1d, priv->eeprom->cr29);
732
733 ADM8211_CSR_WRITE(SYNRF, 0);
734
735 /* Nothing to do for ADMtek BBP */
736 } else if (priv->bbp_type != ADM8211_TYPE_ADMTEK)
737 wiphy_debug(dev->wiphy, "unsupported BBP type %d\n",
738 priv->bbp_type);
739
740 ADM8211_RESTORE();
741
742 /* update current channel for adhoc (and maybe AP mode) */
743 reg = ADM8211_CSR_READ(CAP0);
744 reg &= ~0xF;
745 reg |= chan;
746 ADM8211_CSR_WRITE(CAP0, reg);
747
748 return 0;
749 }
750
adm8211_update_mode(struct ieee80211_hw * dev)751 static void adm8211_update_mode(struct ieee80211_hw *dev)
752 {
753 struct adm8211_priv *priv = dev->priv;
754
755 ADM8211_IDLE();
756
757 priv->soft_rx_crc = 0;
758 switch (priv->mode) {
759 case NL80211_IFTYPE_STATION:
760 priv->nar &= ~(ADM8211_NAR_PR | ADM8211_NAR_EA);
761 priv->nar |= ADM8211_NAR_ST | ADM8211_NAR_SR;
762 break;
763 case NL80211_IFTYPE_ADHOC:
764 priv->nar &= ~ADM8211_NAR_PR;
765 priv->nar |= ADM8211_NAR_EA | ADM8211_NAR_ST | ADM8211_NAR_SR;
766
767 /* don't trust the error bits on rev 0x20 and up in adhoc */
768 if (priv->pdev->revision >= ADM8211_REV_BA)
769 priv->soft_rx_crc = 1;
770 break;
771 case NL80211_IFTYPE_MONITOR:
772 priv->nar &= ~(ADM8211_NAR_EA | ADM8211_NAR_ST);
773 priv->nar |= ADM8211_NAR_PR | ADM8211_NAR_SR;
774 break;
775 }
776
777 ADM8211_RESTORE();
778 }
779
adm8211_hw_init_syn(struct ieee80211_hw * dev)780 static void adm8211_hw_init_syn(struct ieee80211_hw *dev)
781 {
782 struct adm8211_priv *priv = dev->priv;
783
784 switch (priv->transceiver_type) {
785 case ADM8211_RFMD2958:
786 case ADM8211_RFMD2958_RF3000_CONTROL_POWER:
787 /* comments taken from ADMtek vendor driver */
788
789 /* Reset RF2958 after power on */
790 adm8211_rf_write_syn_rfmd2958(dev, 0x1F, 0x00000);
791 /* Initialize RF VCO Core Bias to maximum */
792 adm8211_rf_write_syn_rfmd2958(dev, 0x0C, 0x3001F);
793 /* Initialize IF PLL */
794 adm8211_rf_write_syn_rfmd2958(dev, 0x01, 0x29C03);
795 /* Initialize IF PLL Coarse Tuning */
796 adm8211_rf_write_syn_rfmd2958(dev, 0x03, 0x1FF6F);
797 /* Initialize RF PLL */
798 adm8211_rf_write_syn_rfmd2958(dev, 0x04, 0x29403);
799 /* Initialize RF PLL Coarse Tuning */
800 adm8211_rf_write_syn_rfmd2958(dev, 0x07, 0x1456F);
801 /* Initialize TX gain and filter BW (R9) */
802 adm8211_rf_write_syn_rfmd2958(dev, 0x09,
803 (priv->transceiver_type == ADM8211_RFMD2958 ?
804 0x10050 : 0x00050));
805 /* Initialize CAL register */
806 adm8211_rf_write_syn_rfmd2958(dev, 0x08, 0x3FFF8);
807 break;
808
809 case ADM8211_MAX2820:
810 adm8211_rf_write_syn_max2820(dev, 0x1, 0x01E);
811 adm8211_rf_write_syn_max2820(dev, 0x2, 0x001);
812 adm8211_rf_write_syn_max2820(dev, 0x3, 0x054);
813 adm8211_rf_write_syn_max2820(dev, 0x4, 0x310);
814 adm8211_rf_write_syn_max2820(dev, 0x5, 0x000);
815 break;
816
817 case ADM8211_AL2210L:
818 adm8211_rf_write_syn_al2210l(dev, 0x0, 0x0196C);
819 adm8211_rf_write_syn_al2210l(dev, 0x1, 0x007CB);
820 adm8211_rf_write_syn_al2210l(dev, 0x2, 0x3582F);
821 adm8211_rf_write_syn_al2210l(dev, 0x3, 0x010A9);
822 adm8211_rf_write_syn_al2210l(dev, 0x4, 0x77280);
823 adm8211_rf_write_syn_al2210l(dev, 0x5, 0x45641);
824 adm8211_rf_write_syn_al2210l(dev, 0x6, 0xEA130);
825 adm8211_rf_write_syn_al2210l(dev, 0x7, 0x80000);
826 adm8211_rf_write_syn_al2210l(dev, 0x8, 0x7850F);
827 adm8211_rf_write_syn_al2210l(dev, 0x9, 0xF900C);
828 adm8211_rf_write_syn_al2210l(dev, 0xA, 0x00000);
829 adm8211_rf_write_syn_al2210l(dev, 0xB, 0x00000);
830 break;
831
832 case ADM8211_RFMD2948:
833 default:
834 break;
835 }
836 }
837
adm8211_hw_init_bbp(struct ieee80211_hw * dev)838 static int adm8211_hw_init_bbp(struct ieee80211_hw *dev)
839 {
840 struct adm8211_priv *priv = dev->priv;
841 u32 reg;
842
843 /* write addresses */
844 if (priv->bbp_type == ADM8211_TYPE_INTERSIL) {
845 ADM8211_CSR_WRITE(MMIWA, 0x100E0C0A);
846 ADM8211_CSR_WRITE(MMIRD0, 0x00007C7E);
847 ADM8211_CSR_WRITE(MMIRD1, 0x00100000);
848 } else if (priv->bbp_type == ADM8211_TYPE_RFMD ||
849 priv->bbp_type == ADM8211_TYPE_ADMTEK) {
850 /* check specific BBP type */
851 switch (priv->specific_bbptype) {
852 case ADM8211_BBP_RFMD3000:
853 case ADM8211_BBP_RFMD3002:
854 ADM8211_CSR_WRITE(MMIWA, 0x00009101);
855 ADM8211_CSR_WRITE(MMIRD0, 0x00000301);
856 break;
857
858 case ADM8211_BBP_ADM8011:
859 ADM8211_CSR_WRITE(MMIWA, 0x00008903);
860 ADM8211_CSR_WRITE(MMIRD0, 0x00001716);
861
862 reg = ADM8211_CSR_READ(BBPCTL);
863 reg &= ~ADM8211_BBPCTL_TYPE;
864 reg |= 0x5 << 18;
865 ADM8211_CSR_WRITE(BBPCTL, reg);
866 break;
867 }
868
869 switch (priv->pdev->revision) {
870 case ADM8211_REV_CA:
871 if (priv->transceiver_type == ADM8211_RFMD2958 ||
872 priv->transceiver_type == ADM8211_RFMD2958_RF3000_CONTROL_POWER ||
873 priv->transceiver_type == ADM8211_RFMD2948)
874 ADM8211_CSR_WRITE(SYNCTL, 0x1 << 22);
875 else if (priv->transceiver_type == ADM8211_MAX2820 ||
876 priv->transceiver_type == ADM8211_AL2210L)
877 ADM8211_CSR_WRITE(SYNCTL, 0x3 << 22);
878 break;
879
880 case ADM8211_REV_BA:
881 reg = ADM8211_CSR_READ(MMIRD1);
882 reg &= 0x0000FFFF;
883 reg |= 0x7e100000;
884 ADM8211_CSR_WRITE(MMIRD1, reg);
885 break;
886
887 case ADM8211_REV_AB:
888 case ADM8211_REV_AF:
889 default:
890 ADM8211_CSR_WRITE(MMIRD1, 0x7e100000);
891 break;
892 }
893
894 /* For RFMD */
895 ADM8211_CSR_WRITE(MACTEST, 0x800);
896 }
897
898 adm8211_hw_init_syn(dev);
899
900 /* Set RF Power control IF pin to PE1+PHYRST# */
901 ADM8211_CSR_WRITE(SYNRF, ADM8211_SYNRF_SELRF |
902 ADM8211_SYNRF_PE1 | ADM8211_SYNRF_PHYRST);
903 ADM8211_CSR_READ(SYNRF);
904 msleep(20);
905
906 /* write BBP regs */
907 if (priv->bbp_type == ADM8211_TYPE_RFMD) {
908 /* RF3000 BBP */
909 /* another set:
910 * 11: c8
911 * 14: 14
912 * 15: 50 (chan 1..13; chan 14: d0)
913 * 1c: 00
914 * 1d: 84
915 */
916 adm8211_write_bbp(dev, RF3000_CCA_CTRL, 0x80);
917 /* antenna selection: diversity */
918 adm8211_write_bbp(dev, RF3000_DIVERSITY__RSSI, 0x80);
919 adm8211_write_bbp(dev, RF3000_TX_VAR_GAIN__TX_LEN_EXT, 0x74);
920 adm8211_write_bbp(dev, RF3000_LOW_GAIN_CALIB, 0x38);
921 adm8211_write_bbp(dev, RF3000_HIGH_GAIN_CALIB, 0x40);
922
923 if (priv->eeprom->major_version < 2) {
924 adm8211_write_bbp(dev, 0x1c, 0x00);
925 adm8211_write_bbp(dev, 0x1d, 0x80);
926 } else {
927 if (priv->pdev->revision == ADM8211_REV_BA)
928 adm8211_write_bbp(dev, 0x1c, priv->eeprom->cr28);
929 else
930 adm8211_write_bbp(dev, 0x1c, 0x00);
931
932 adm8211_write_bbp(dev, 0x1d, priv->eeprom->cr29);
933 }
934 } else if (priv->bbp_type == ADM8211_TYPE_ADMTEK) {
935 /* reset baseband */
936 adm8211_write_bbp(dev, 0x00, 0xFF);
937 /* antenna selection: diversity */
938 adm8211_write_bbp(dev, 0x07, 0x0A);
939
940 /* TODO: find documentation for this */
941 switch (priv->transceiver_type) {
942 case ADM8211_RFMD2958:
943 case ADM8211_RFMD2958_RF3000_CONTROL_POWER:
944 adm8211_write_bbp(dev, 0x00, 0x00);
945 adm8211_write_bbp(dev, 0x01, 0x00);
946 adm8211_write_bbp(dev, 0x02, 0x00);
947 adm8211_write_bbp(dev, 0x03, 0x00);
948 adm8211_write_bbp(dev, 0x06, 0x0f);
949 adm8211_write_bbp(dev, 0x09, 0x00);
950 adm8211_write_bbp(dev, 0x0a, 0x00);
951 adm8211_write_bbp(dev, 0x0b, 0x00);
952 adm8211_write_bbp(dev, 0x0c, 0x00);
953 adm8211_write_bbp(dev, 0x0f, 0xAA);
954 adm8211_write_bbp(dev, 0x10, 0x8c);
955 adm8211_write_bbp(dev, 0x11, 0x43);
956 adm8211_write_bbp(dev, 0x18, 0x40);
957 adm8211_write_bbp(dev, 0x20, 0x23);
958 adm8211_write_bbp(dev, 0x21, 0x02);
959 adm8211_write_bbp(dev, 0x22, 0x28);
960 adm8211_write_bbp(dev, 0x23, 0x30);
961 adm8211_write_bbp(dev, 0x24, 0x2d);
962 adm8211_write_bbp(dev, 0x28, 0x35);
963 adm8211_write_bbp(dev, 0x2a, 0x8c);
964 adm8211_write_bbp(dev, 0x2b, 0x81);
965 adm8211_write_bbp(dev, 0x2c, 0x44);
966 adm8211_write_bbp(dev, 0x2d, 0x0A);
967 adm8211_write_bbp(dev, 0x29, 0x40);
968 adm8211_write_bbp(dev, 0x60, 0x08);
969 adm8211_write_bbp(dev, 0x64, 0x01);
970 break;
971
972 case ADM8211_MAX2820:
973 adm8211_write_bbp(dev, 0x00, 0x00);
974 adm8211_write_bbp(dev, 0x01, 0x00);
975 adm8211_write_bbp(dev, 0x02, 0x00);
976 adm8211_write_bbp(dev, 0x03, 0x00);
977 adm8211_write_bbp(dev, 0x06, 0x0f);
978 adm8211_write_bbp(dev, 0x09, 0x05);
979 adm8211_write_bbp(dev, 0x0a, 0x02);
980 adm8211_write_bbp(dev, 0x0b, 0x00);
981 adm8211_write_bbp(dev, 0x0c, 0x0f);
982 adm8211_write_bbp(dev, 0x0f, 0x55);
983 adm8211_write_bbp(dev, 0x10, 0x8d);
984 adm8211_write_bbp(dev, 0x11, 0x43);
985 adm8211_write_bbp(dev, 0x18, 0x4a);
986 adm8211_write_bbp(dev, 0x20, 0x20);
987 adm8211_write_bbp(dev, 0x21, 0x02);
988 adm8211_write_bbp(dev, 0x22, 0x23);
989 adm8211_write_bbp(dev, 0x23, 0x30);
990 adm8211_write_bbp(dev, 0x24, 0x2d);
991 adm8211_write_bbp(dev, 0x2a, 0x8c);
992 adm8211_write_bbp(dev, 0x2b, 0x81);
993 adm8211_write_bbp(dev, 0x2c, 0x44);
994 adm8211_write_bbp(dev, 0x29, 0x4a);
995 adm8211_write_bbp(dev, 0x60, 0x2b);
996 adm8211_write_bbp(dev, 0x64, 0x01);
997 break;
998
999 case ADM8211_AL2210L:
1000 adm8211_write_bbp(dev, 0x00, 0x00);
1001 adm8211_write_bbp(dev, 0x01, 0x00);
1002 adm8211_write_bbp(dev, 0x02, 0x00);
1003 adm8211_write_bbp(dev, 0x03, 0x00);
1004 adm8211_write_bbp(dev, 0x06, 0x0f);
1005 adm8211_write_bbp(dev, 0x07, 0x05);
1006 adm8211_write_bbp(dev, 0x08, 0x03);
1007 adm8211_write_bbp(dev, 0x09, 0x00);
1008 adm8211_write_bbp(dev, 0x0a, 0x00);
1009 adm8211_write_bbp(dev, 0x0b, 0x00);
1010 adm8211_write_bbp(dev, 0x0c, 0x10);
1011 adm8211_write_bbp(dev, 0x0f, 0x55);
1012 adm8211_write_bbp(dev, 0x10, 0x8d);
1013 adm8211_write_bbp(dev, 0x11, 0x43);
1014 adm8211_write_bbp(dev, 0x18, 0x4a);
1015 adm8211_write_bbp(dev, 0x20, 0x20);
1016 adm8211_write_bbp(dev, 0x21, 0x02);
1017 adm8211_write_bbp(dev, 0x22, 0x23);
1018 adm8211_write_bbp(dev, 0x23, 0x30);
1019 adm8211_write_bbp(dev, 0x24, 0x2d);
1020 adm8211_write_bbp(dev, 0x2a, 0xaa);
1021 adm8211_write_bbp(dev, 0x2b, 0x81);
1022 adm8211_write_bbp(dev, 0x2c, 0x44);
1023 adm8211_write_bbp(dev, 0x29, 0xfa);
1024 adm8211_write_bbp(dev, 0x60, 0x2d);
1025 adm8211_write_bbp(dev, 0x64, 0x01);
1026 break;
1027
1028 case ADM8211_RFMD2948:
1029 break;
1030
1031 default:
1032 wiphy_debug(dev->wiphy, "unsupported transceiver %d\n",
1033 priv->transceiver_type);
1034 break;
1035 }
1036 } else
1037 wiphy_debug(dev->wiphy, "unsupported BBP %d\n", priv->bbp_type);
1038
1039 ADM8211_CSR_WRITE(SYNRF, 0);
1040
1041 /* Set RF CAL control source to MAC control */
1042 reg = ADM8211_CSR_READ(SYNCTL);
1043 reg |= ADM8211_SYNCTL_SELCAL;
1044 ADM8211_CSR_WRITE(SYNCTL, reg);
1045
1046 return 0;
1047 }
1048
1049 /* configures hw beacons/probe responses */
adm8211_set_rate(struct ieee80211_hw * dev)1050 static int adm8211_set_rate(struct ieee80211_hw *dev)
1051 {
1052 struct adm8211_priv *priv = dev->priv;
1053 u32 reg;
1054 int i = 0;
1055 u8 rate_buf[12] = {0};
1056
1057 /* write supported rates */
1058 if (priv->pdev->revision != ADM8211_REV_BA) {
1059 rate_buf[0] = ARRAY_SIZE(adm8211_rates);
1060 for (i = 0; i < ARRAY_SIZE(adm8211_rates); i++)
1061 rate_buf[i + 1] = (adm8211_rates[i].bitrate / 5) | 0x80;
1062 } else {
1063 /* workaround for rev BA specific bug */
1064 rate_buf[0] = 0x04;
1065 rate_buf[1] = 0x82;
1066 rate_buf[2] = 0x04;
1067 rate_buf[3] = 0x0b;
1068 rate_buf[4] = 0x16;
1069 }
1070
1071 adm8211_write_sram_bytes(dev, ADM8211_SRAM_SUPP_RATE, rate_buf,
1072 ARRAY_SIZE(adm8211_rates) + 1);
1073
1074 reg = ADM8211_CSR_READ(PLCPHD) & 0x00FFFFFF; /* keep bits 0-23 */
1075 reg |= 1 << 15; /* short preamble */
1076 reg |= 110 << 24;
1077 ADM8211_CSR_WRITE(PLCPHD, reg);
1078
1079 /* MTMLT = 512 TU (max TX MSDU lifetime)
1080 * BCNTSIG = plcp_signal (beacon, probe resp, and atim TX rate)
1081 * SRTYLIM = 224 (short retry limit, TX header value is default) */
1082 ADM8211_CSR_WRITE(TXLMT, (512 << 16) | (110 << 8) | (224 << 0));
1083
1084 return 0;
1085 }
1086
adm8211_hw_init(struct ieee80211_hw * dev)1087 static void adm8211_hw_init(struct ieee80211_hw *dev)
1088 {
1089 struct adm8211_priv *priv = dev->priv;
1090 u32 reg;
1091 u8 cline;
1092
1093 reg = ADM8211_CSR_READ(PAR);
1094 reg |= ADM8211_PAR_MRLE | ADM8211_PAR_MRME;
1095 reg &= ~(ADM8211_PAR_BAR | ADM8211_PAR_CAL);
1096
1097 if (!pci_set_mwi(priv->pdev)) {
1098 reg |= 0x1 << 24;
1099 pci_read_config_byte(priv->pdev, PCI_CACHE_LINE_SIZE, &cline);
1100
1101 switch (cline) {
1102 case 0x8: reg |= (0x1 << 14);
1103 break;
1104 case 0x16: reg |= (0x2 << 14);
1105 break;
1106 case 0x32: reg |= (0x3 << 14);
1107 break;
1108 default: reg |= (0x0 << 14);
1109 break;
1110 }
1111 }
1112
1113 ADM8211_CSR_WRITE(PAR, reg);
1114
1115 reg = ADM8211_CSR_READ(CSR_TEST1);
1116 reg &= ~(0xF << 28);
1117 reg |= (1 << 28) | (1 << 31);
1118 ADM8211_CSR_WRITE(CSR_TEST1, reg);
1119
1120 /* lose link after 4 lost beacons */
1121 reg = (0x04 << 21) | ADM8211_WCSR_TSFTWE | ADM8211_WCSR_LSOE;
1122 ADM8211_CSR_WRITE(WCSR, reg);
1123
1124 /* Disable APM, enable receive FIFO threshold, and set drain receive
1125 * threshold to store-and-forward */
1126 reg = ADM8211_CSR_READ(CMDR);
1127 reg &= ~(ADM8211_CMDR_APM | ADM8211_CMDR_DRT);
1128 reg |= ADM8211_CMDR_RTE | ADM8211_CMDR_DRT_SF;
1129 ADM8211_CSR_WRITE(CMDR, reg);
1130
1131 adm8211_set_rate(dev);
1132
1133 /* 4-bit values:
1134 * PWR1UP = 8 * 2 ms
1135 * PWR0PAPE = 8 us or 5 us
1136 * PWR1PAPE = 1 us or 3 us
1137 * PWR0TRSW = 5 us
1138 * PWR1TRSW = 12 us
1139 * PWR0PE2 = 13 us
1140 * PWR1PE2 = 1 us
1141 * PWR0TXPE = 8 or 6 */
1142 if (priv->pdev->revision < ADM8211_REV_CA)
1143 ADM8211_CSR_WRITE(TOFS2, 0x8815cd18);
1144 else
1145 ADM8211_CSR_WRITE(TOFS2, 0x8535cd16);
1146
1147 /* Enable store and forward for transmit */
1148 priv->nar = ADM8211_NAR_SF | ADM8211_NAR_PB;
1149 ADM8211_CSR_WRITE(NAR, priv->nar);
1150
1151 /* Reset RF */
1152 ADM8211_CSR_WRITE(SYNRF, ADM8211_SYNRF_RADIO);
1153 ADM8211_CSR_READ(SYNRF);
1154 msleep(10);
1155 ADM8211_CSR_WRITE(SYNRF, 0);
1156 ADM8211_CSR_READ(SYNRF);
1157 msleep(5);
1158
1159 /* Set CFP Max Duration to 0x10 TU */
1160 reg = ADM8211_CSR_READ(CFPP);
1161 reg &= ~(0xffff << 8);
1162 reg |= 0x0010 << 8;
1163 ADM8211_CSR_WRITE(CFPP, reg);
1164
1165 /* USCNT = 0x16 (number of system clocks, 22 MHz, in 1us
1166 * TUCNT = 0x3ff - Tu counter 1024 us */
1167 ADM8211_CSR_WRITE(TOFS0, (0x16 << 24) | 0x3ff);
1168
1169 /* SLOT=20 us, SIFS=110 cycles of 22 MHz (5 us),
1170 * DIFS=50 us, EIFS=100 us */
1171 if (priv->pdev->revision < ADM8211_REV_CA)
1172 ADM8211_CSR_WRITE(IFST, (20 << 23) | (110 << 15) |
1173 (50 << 9) | 100);
1174 else
1175 ADM8211_CSR_WRITE(IFST, (20 << 23) | (24 << 15) |
1176 (50 << 9) | 100);
1177
1178 /* PCNT = 1 (MAC idle time awake/sleep, unit S)
1179 * RMRD = 2346 * 8 + 1 us (max RX duration) */
1180 ADM8211_CSR_WRITE(RMD, (1 << 16) | 18769);
1181
1182 /* MART=65535 us, MIRT=256 us, TSFTOFST=0 us */
1183 ADM8211_CSR_WRITE(RSPT, 0xffffff00);
1184
1185 /* Initialize BBP (and SYN) */
1186 adm8211_hw_init_bbp(dev);
1187
1188 /* make sure interrupts are off */
1189 ADM8211_CSR_WRITE(IER, 0);
1190
1191 /* ACK interrupts */
1192 ADM8211_CSR_WRITE(STSR, ADM8211_CSR_READ(STSR));
1193
1194 /* Setup WEP (turns it off for now) */
1195 reg = ADM8211_CSR_READ(MACTEST);
1196 reg &= ~(7 << 20);
1197 ADM8211_CSR_WRITE(MACTEST, reg);
1198
1199 reg = ADM8211_CSR_READ(WEPCTL);
1200 reg &= ~ADM8211_WEPCTL_WEPENABLE;
1201 reg |= ADM8211_WEPCTL_WEPRXBYP;
1202 ADM8211_CSR_WRITE(WEPCTL, reg);
1203
1204 /* Clear the missed-packet counter. */
1205 ADM8211_CSR_READ(LPC);
1206 }
1207
adm8211_hw_reset(struct ieee80211_hw * dev)1208 static int adm8211_hw_reset(struct ieee80211_hw *dev)
1209 {
1210 struct adm8211_priv *priv = dev->priv;
1211 u32 reg, tmp;
1212 int timeout = 100;
1213
1214 /* Power-on issue */
1215 /* TODO: check if this is necessary */
1216 ADM8211_CSR_WRITE(FRCTL, 0);
1217
1218 /* Reset the chip */
1219 tmp = ADM8211_CSR_READ(PAR);
1220 ADM8211_CSR_WRITE(PAR, ADM8211_PAR_SWR);
1221
1222 while ((ADM8211_CSR_READ(PAR) & ADM8211_PAR_SWR) && timeout--)
1223 msleep(50);
1224
1225 if (timeout <= 0)
1226 return -ETIMEDOUT;
1227
1228 ADM8211_CSR_WRITE(PAR, tmp);
1229
1230 if (priv->pdev->revision == ADM8211_REV_BA &&
1231 (priv->transceiver_type == ADM8211_RFMD2958_RF3000_CONTROL_POWER ||
1232 priv->transceiver_type == ADM8211_RFMD2958)) {
1233 reg = ADM8211_CSR_READ(CSR_TEST1);
1234 reg |= (1 << 4) | (1 << 5);
1235 ADM8211_CSR_WRITE(CSR_TEST1, reg);
1236 } else if (priv->pdev->revision == ADM8211_REV_CA) {
1237 reg = ADM8211_CSR_READ(CSR_TEST1);
1238 reg &= ~((1 << 4) | (1 << 5));
1239 ADM8211_CSR_WRITE(CSR_TEST1, reg);
1240 }
1241
1242 ADM8211_CSR_WRITE(FRCTL, 0);
1243
1244 reg = ADM8211_CSR_READ(CSR_TEST0);
1245 reg |= ADM8211_CSR_TEST0_EPRLD; /* EEPROM Recall */
1246 ADM8211_CSR_WRITE(CSR_TEST0, reg);
1247
1248 adm8211_clear_sram(dev);
1249
1250 return 0;
1251 }
1252
adm8211_get_tsft(struct ieee80211_hw * dev,struct ieee80211_vif * vif)1253 static u64 adm8211_get_tsft(struct ieee80211_hw *dev,
1254 struct ieee80211_vif *vif)
1255 {
1256 struct adm8211_priv *priv = dev->priv;
1257 u32 tsftl;
1258 u64 tsft;
1259
1260 tsftl = ADM8211_CSR_READ(TSFTL);
1261 tsft = ADM8211_CSR_READ(TSFTH);
1262 tsft <<= 32;
1263 tsft |= tsftl;
1264
1265 return tsft;
1266 }
1267
adm8211_set_interval(struct ieee80211_hw * dev,unsigned short bi,unsigned short li)1268 static void adm8211_set_interval(struct ieee80211_hw *dev,
1269 unsigned short bi, unsigned short li)
1270 {
1271 struct adm8211_priv *priv = dev->priv;
1272 u32 reg;
1273
1274 /* BP (beacon interval) = data->beacon_interval
1275 * LI (listen interval) = data->listen_interval (in beacon intervals) */
1276 reg = (bi << 16) | li;
1277 ADM8211_CSR_WRITE(BPLI, reg);
1278 }
1279
adm8211_set_bssid(struct ieee80211_hw * dev,const u8 * bssid)1280 static void adm8211_set_bssid(struct ieee80211_hw *dev, const u8 *bssid)
1281 {
1282 struct adm8211_priv *priv = dev->priv;
1283 u32 reg;
1284
1285 ADM8211_CSR_WRITE(BSSID0, le32_to_cpu(*(__le32 *)bssid));
1286 reg = ADM8211_CSR_READ(ABDA1);
1287 reg &= 0x0000ffff;
1288 reg |= (bssid[4] << 16) | (bssid[5] << 24);
1289 ADM8211_CSR_WRITE(ABDA1, reg);
1290 }
1291
adm8211_config(struct ieee80211_hw * dev,u32 changed)1292 static int adm8211_config(struct ieee80211_hw *dev, u32 changed)
1293 {
1294 struct adm8211_priv *priv = dev->priv;
1295 struct ieee80211_conf *conf = &dev->conf;
1296 int channel = ieee80211_frequency_to_channel(conf->channel->center_freq);
1297
1298 if (channel != priv->channel) {
1299 priv->channel = channel;
1300 adm8211_rf_set_channel(dev, priv->channel);
1301 }
1302
1303 return 0;
1304 }
1305
adm8211_bss_info_changed(struct ieee80211_hw * dev,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf,u32 changes)1306 static void adm8211_bss_info_changed(struct ieee80211_hw *dev,
1307 struct ieee80211_vif *vif,
1308 struct ieee80211_bss_conf *conf,
1309 u32 changes)
1310 {
1311 struct adm8211_priv *priv = dev->priv;
1312
1313 if (!(changes & BSS_CHANGED_BSSID))
1314 return;
1315
1316 if (memcmp(conf->bssid, priv->bssid, ETH_ALEN)) {
1317 adm8211_set_bssid(dev, conf->bssid);
1318 memcpy(priv->bssid, conf->bssid, ETH_ALEN);
1319 }
1320 }
1321
adm8211_prepare_multicast(struct ieee80211_hw * hw,struct netdev_hw_addr_list * mc_list)1322 static u64 adm8211_prepare_multicast(struct ieee80211_hw *hw,
1323 struct netdev_hw_addr_list *mc_list)
1324 {
1325 unsigned int bit_nr;
1326 u32 mc_filter[2];
1327 struct netdev_hw_addr *ha;
1328
1329 mc_filter[1] = mc_filter[0] = 0;
1330
1331 netdev_hw_addr_list_for_each(ha, mc_list) {
1332 bit_nr = ether_crc(ETH_ALEN, ha->addr) >> 26;
1333
1334 bit_nr &= 0x3F;
1335 mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31);
1336 }
1337
1338 return mc_filter[0] | ((u64)(mc_filter[1]) << 32);
1339 }
1340
adm8211_configure_filter(struct ieee80211_hw * dev,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)1341 static void adm8211_configure_filter(struct ieee80211_hw *dev,
1342 unsigned int changed_flags,
1343 unsigned int *total_flags,
1344 u64 multicast)
1345 {
1346 static const u8 bcast[ETH_ALEN] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
1347 struct adm8211_priv *priv = dev->priv;
1348 unsigned int new_flags;
1349 u32 mc_filter[2];
1350
1351 mc_filter[0] = multicast;
1352 mc_filter[1] = multicast >> 32;
1353
1354 new_flags = 0;
1355
1356 if (*total_flags & FIF_PROMISC_IN_BSS) {
1357 new_flags |= FIF_PROMISC_IN_BSS;
1358 priv->nar |= ADM8211_NAR_PR;
1359 priv->nar &= ~ADM8211_NAR_MM;
1360 mc_filter[1] = mc_filter[0] = ~0;
1361 } else if (*total_flags & FIF_ALLMULTI || multicast == ~(0ULL)) {
1362 new_flags |= FIF_ALLMULTI;
1363 priv->nar &= ~ADM8211_NAR_PR;
1364 priv->nar |= ADM8211_NAR_MM;
1365 mc_filter[1] = mc_filter[0] = ~0;
1366 } else {
1367 priv->nar &= ~(ADM8211_NAR_MM | ADM8211_NAR_PR);
1368 }
1369
1370 ADM8211_IDLE_RX();
1371
1372 ADM8211_CSR_WRITE(MAR0, mc_filter[0]);
1373 ADM8211_CSR_WRITE(MAR1, mc_filter[1]);
1374 ADM8211_CSR_READ(NAR);
1375
1376 if (priv->nar & ADM8211_NAR_PR)
1377 dev->flags |= IEEE80211_HW_RX_INCLUDES_FCS;
1378 else
1379 dev->flags &= ~IEEE80211_HW_RX_INCLUDES_FCS;
1380
1381 if (*total_flags & FIF_BCN_PRBRESP_PROMISC)
1382 adm8211_set_bssid(dev, bcast);
1383 else
1384 adm8211_set_bssid(dev, priv->bssid);
1385
1386 ADM8211_RESTORE();
1387
1388 *total_flags = new_flags;
1389 }
1390
adm8211_add_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif)1391 static int adm8211_add_interface(struct ieee80211_hw *dev,
1392 struct ieee80211_vif *vif)
1393 {
1394 struct adm8211_priv *priv = dev->priv;
1395 if (priv->mode != NL80211_IFTYPE_MONITOR)
1396 return -EOPNOTSUPP;
1397
1398 switch (vif->type) {
1399 case NL80211_IFTYPE_STATION:
1400 priv->mode = vif->type;
1401 break;
1402 default:
1403 return -EOPNOTSUPP;
1404 }
1405
1406 ADM8211_IDLE();
1407
1408 ADM8211_CSR_WRITE(PAR0, le32_to_cpu(*(__le32 *)vif->addr));
1409 ADM8211_CSR_WRITE(PAR1, le16_to_cpu(*(__le16 *)(vif->addr + 4)));
1410
1411 adm8211_update_mode(dev);
1412
1413 ADM8211_RESTORE();
1414
1415 return 0;
1416 }
1417
adm8211_remove_interface(struct ieee80211_hw * dev,struct ieee80211_vif * vif)1418 static void adm8211_remove_interface(struct ieee80211_hw *dev,
1419 struct ieee80211_vif *vif)
1420 {
1421 struct adm8211_priv *priv = dev->priv;
1422 priv->mode = NL80211_IFTYPE_MONITOR;
1423 }
1424
adm8211_init_rings(struct ieee80211_hw * dev)1425 static int adm8211_init_rings(struct ieee80211_hw *dev)
1426 {
1427 struct adm8211_priv *priv = dev->priv;
1428 struct adm8211_desc *desc = NULL;
1429 struct adm8211_rx_ring_info *rx_info;
1430 struct adm8211_tx_ring_info *tx_info;
1431 unsigned int i;
1432
1433 for (i = 0; i < priv->rx_ring_size; i++) {
1434 desc = &priv->rx_ring[i];
1435 desc->status = 0;
1436 desc->length = cpu_to_le32(RX_PKT_SIZE);
1437 priv->rx_buffers[i].skb = NULL;
1438 }
1439 /* Mark the end of RX ring; hw returns to base address after this
1440 * descriptor */
1441 desc->length |= cpu_to_le32(RDES1_CONTROL_RER);
1442
1443 for (i = 0; i < priv->rx_ring_size; i++) {
1444 desc = &priv->rx_ring[i];
1445 rx_info = &priv->rx_buffers[i];
1446
1447 rx_info->skb = dev_alloc_skb(RX_PKT_SIZE);
1448 if (rx_info->skb == NULL)
1449 break;
1450 rx_info->mapping = pci_map_single(priv->pdev,
1451 skb_tail_pointer(rx_info->skb),
1452 RX_PKT_SIZE,
1453 PCI_DMA_FROMDEVICE);
1454 desc->buffer1 = cpu_to_le32(rx_info->mapping);
1455 desc->status = cpu_to_le32(RDES0_STATUS_OWN | RDES0_STATUS_SQL);
1456 }
1457
1458 /* Setup TX ring. TX buffers descriptors will be filled in as needed */
1459 for (i = 0; i < priv->tx_ring_size; i++) {
1460 desc = &priv->tx_ring[i];
1461 tx_info = &priv->tx_buffers[i];
1462
1463 tx_info->skb = NULL;
1464 tx_info->mapping = 0;
1465 desc->status = 0;
1466 }
1467 desc->length = cpu_to_le32(TDES1_CONTROL_TER);
1468
1469 priv->cur_rx = priv->cur_tx = priv->dirty_tx = 0;
1470 ADM8211_CSR_WRITE(RDB, priv->rx_ring_dma);
1471 ADM8211_CSR_WRITE(TDBD, priv->tx_ring_dma);
1472
1473 return 0;
1474 }
1475
adm8211_free_rings(struct ieee80211_hw * dev)1476 static void adm8211_free_rings(struct ieee80211_hw *dev)
1477 {
1478 struct adm8211_priv *priv = dev->priv;
1479 unsigned int i;
1480
1481 for (i = 0; i < priv->rx_ring_size; i++) {
1482 if (!priv->rx_buffers[i].skb)
1483 continue;
1484
1485 pci_unmap_single(
1486 priv->pdev,
1487 priv->rx_buffers[i].mapping,
1488 RX_PKT_SIZE, PCI_DMA_FROMDEVICE);
1489
1490 dev_kfree_skb(priv->rx_buffers[i].skb);
1491 }
1492
1493 for (i = 0; i < priv->tx_ring_size; i++) {
1494 if (!priv->tx_buffers[i].skb)
1495 continue;
1496
1497 pci_unmap_single(priv->pdev,
1498 priv->tx_buffers[i].mapping,
1499 priv->tx_buffers[i].skb->len,
1500 PCI_DMA_TODEVICE);
1501
1502 dev_kfree_skb(priv->tx_buffers[i].skb);
1503 }
1504 }
1505
adm8211_start(struct ieee80211_hw * dev)1506 static int adm8211_start(struct ieee80211_hw *dev)
1507 {
1508 struct adm8211_priv *priv = dev->priv;
1509 int retval;
1510
1511 /* Power up MAC and RF chips */
1512 retval = adm8211_hw_reset(dev);
1513 if (retval) {
1514 wiphy_err(dev->wiphy, "hardware reset failed\n");
1515 goto fail;
1516 }
1517
1518 retval = adm8211_init_rings(dev);
1519 if (retval) {
1520 wiphy_err(dev->wiphy, "failed to initialize rings\n");
1521 goto fail;
1522 }
1523
1524 /* Init hardware */
1525 adm8211_hw_init(dev);
1526 adm8211_rf_set_channel(dev, priv->channel);
1527
1528 retval = request_irq(priv->pdev->irq, adm8211_interrupt,
1529 IRQF_SHARED, "adm8211", dev);
1530 if (retval) {
1531 wiphy_err(dev->wiphy, "failed to register IRQ handler\n");
1532 goto fail;
1533 }
1534
1535 ADM8211_CSR_WRITE(IER, ADM8211_IER_NIE | ADM8211_IER_AIE |
1536 ADM8211_IER_RCIE | ADM8211_IER_TCIE |
1537 ADM8211_IER_TDUIE | ADM8211_IER_GPTIE);
1538 priv->mode = NL80211_IFTYPE_MONITOR;
1539 adm8211_update_mode(dev);
1540 ADM8211_CSR_WRITE(RDR, 0);
1541
1542 adm8211_set_interval(dev, 100, 10);
1543 return 0;
1544
1545 fail:
1546 return retval;
1547 }
1548
adm8211_stop(struct ieee80211_hw * dev)1549 static void adm8211_stop(struct ieee80211_hw *dev)
1550 {
1551 struct adm8211_priv *priv = dev->priv;
1552
1553 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1554 priv->nar = 0;
1555 ADM8211_CSR_WRITE(NAR, 0);
1556 ADM8211_CSR_WRITE(IER, 0);
1557 ADM8211_CSR_READ(NAR);
1558
1559 free_irq(priv->pdev->irq, dev);
1560
1561 adm8211_free_rings(dev);
1562 }
1563
adm8211_calc_durations(int * dur,int * plcp,size_t payload_len,int len,int plcp_signal,int short_preamble)1564 static void adm8211_calc_durations(int *dur, int *plcp, size_t payload_len, int len,
1565 int plcp_signal, int short_preamble)
1566 {
1567 /* Alternative calculation from NetBSD: */
1568
1569 /* IEEE 802.11b durations for DSSS PHY in microseconds */
1570 #define IEEE80211_DUR_DS_LONG_PREAMBLE 144
1571 #define IEEE80211_DUR_DS_SHORT_PREAMBLE 72
1572 #define IEEE80211_DUR_DS_FAST_PLCPHDR 24
1573 #define IEEE80211_DUR_DS_SLOW_PLCPHDR 48
1574 #define IEEE80211_DUR_DS_SLOW_ACK 112
1575 #define IEEE80211_DUR_DS_FAST_ACK 56
1576 #define IEEE80211_DUR_DS_SLOW_CTS 112
1577 #define IEEE80211_DUR_DS_FAST_CTS 56
1578 #define IEEE80211_DUR_DS_SLOT 20
1579 #define IEEE80211_DUR_DS_SIFS 10
1580
1581 int remainder;
1582
1583 *dur = (80 * (24 + payload_len) + plcp_signal - 1)
1584 / plcp_signal;
1585
1586 if (plcp_signal <= PLCP_SIGNAL_2M)
1587 /* 1-2Mbps WLAN: send ACK/CTS at 1Mbps */
1588 *dur += 3 * (IEEE80211_DUR_DS_SIFS +
1589 IEEE80211_DUR_DS_SHORT_PREAMBLE +
1590 IEEE80211_DUR_DS_FAST_PLCPHDR) +
1591 IEEE80211_DUR_DS_SLOW_CTS + IEEE80211_DUR_DS_SLOW_ACK;
1592 else
1593 /* 5-11Mbps WLAN: send ACK/CTS at 2Mbps */
1594 *dur += 3 * (IEEE80211_DUR_DS_SIFS +
1595 IEEE80211_DUR_DS_SHORT_PREAMBLE +
1596 IEEE80211_DUR_DS_FAST_PLCPHDR) +
1597 IEEE80211_DUR_DS_FAST_CTS + IEEE80211_DUR_DS_FAST_ACK;
1598
1599 /* lengthen duration if long preamble */
1600 if (!short_preamble)
1601 *dur += 3 * (IEEE80211_DUR_DS_LONG_PREAMBLE -
1602 IEEE80211_DUR_DS_SHORT_PREAMBLE) +
1603 3 * (IEEE80211_DUR_DS_SLOW_PLCPHDR -
1604 IEEE80211_DUR_DS_FAST_PLCPHDR);
1605
1606
1607 *plcp = (80 * len) / plcp_signal;
1608 remainder = (80 * len) % plcp_signal;
1609 if (plcp_signal == PLCP_SIGNAL_11M &&
1610 remainder <= 30 && remainder > 0)
1611 *plcp = (*plcp | 0x8000) + 1;
1612 else if (remainder)
1613 (*plcp)++;
1614 }
1615
1616 /* Transmit skb w/adm8211_tx_hdr (802.11 header created by hardware) */
adm8211_tx_raw(struct ieee80211_hw * dev,struct sk_buff * skb,u16 plcp_signal,size_t hdrlen)1617 static void adm8211_tx_raw(struct ieee80211_hw *dev, struct sk_buff *skb,
1618 u16 plcp_signal,
1619 size_t hdrlen)
1620 {
1621 struct adm8211_priv *priv = dev->priv;
1622 unsigned long flags;
1623 dma_addr_t mapping;
1624 unsigned int entry;
1625 u32 flag;
1626
1627 mapping = pci_map_single(priv->pdev, skb->data, skb->len,
1628 PCI_DMA_TODEVICE);
1629
1630 spin_lock_irqsave(&priv->lock, flags);
1631
1632 if (priv->cur_tx - priv->dirty_tx == priv->tx_ring_size / 2)
1633 flag = TDES1_CONTROL_IC | TDES1_CONTROL_LS | TDES1_CONTROL_FS;
1634 else
1635 flag = TDES1_CONTROL_LS | TDES1_CONTROL_FS;
1636
1637 if (priv->cur_tx - priv->dirty_tx == priv->tx_ring_size - 2)
1638 ieee80211_stop_queue(dev, 0);
1639
1640 entry = priv->cur_tx % priv->tx_ring_size;
1641
1642 priv->tx_buffers[entry].skb = skb;
1643 priv->tx_buffers[entry].mapping = mapping;
1644 priv->tx_buffers[entry].hdrlen = hdrlen;
1645 priv->tx_ring[entry].buffer1 = cpu_to_le32(mapping);
1646
1647 if (entry == priv->tx_ring_size - 1)
1648 flag |= TDES1_CONTROL_TER;
1649 priv->tx_ring[entry].length = cpu_to_le32(flag | skb->len);
1650
1651 /* Set TX rate (SIGNAL field in PLCP PPDU format) */
1652 flag = TDES0_CONTROL_OWN | (plcp_signal << 20) | 8 /* ? */;
1653 priv->tx_ring[entry].status = cpu_to_le32(flag);
1654
1655 priv->cur_tx++;
1656
1657 spin_unlock_irqrestore(&priv->lock, flags);
1658
1659 /* Trigger transmit poll */
1660 ADM8211_CSR_WRITE(TDR, 0);
1661 }
1662
1663 /* Put adm8211_tx_hdr on skb and transmit */
adm8211_tx(struct ieee80211_hw * dev,struct sk_buff * skb)1664 static void adm8211_tx(struct ieee80211_hw *dev, struct sk_buff *skb)
1665 {
1666 struct adm8211_tx_hdr *txhdr;
1667 size_t payload_len, hdrlen;
1668 int plcp, dur, len, plcp_signal, short_preamble;
1669 struct ieee80211_hdr *hdr;
1670 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1671 struct ieee80211_rate *txrate = ieee80211_get_tx_rate(dev, info);
1672 u8 rc_flags;
1673
1674 rc_flags = info->control.rates[0].flags;
1675 short_preamble = !!(rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE);
1676 plcp_signal = txrate->bitrate;
1677
1678 hdr = (struct ieee80211_hdr *)skb->data;
1679 hdrlen = ieee80211_hdrlen(hdr->frame_control);
1680 memcpy(skb->cb, skb->data, hdrlen);
1681 hdr = (struct ieee80211_hdr *)skb->cb;
1682 skb_pull(skb, hdrlen);
1683 payload_len = skb->len;
1684
1685 txhdr = (struct adm8211_tx_hdr *) skb_push(skb, sizeof(*txhdr));
1686 memset(txhdr, 0, sizeof(*txhdr));
1687 memcpy(txhdr->da, ieee80211_get_DA(hdr), ETH_ALEN);
1688 txhdr->signal = plcp_signal;
1689 txhdr->frame_body_size = cpu_to_le16(payload_len);
1690 txhdr->frame_control = hdr->frame_control;
1691
1692 len = hdrlen + payload_len + FCS_LEN;
1693
1694 txhdr->frag = cpu_to_le16(0x0FFF);
1695 adm8211_calc_durations(&dur, &plcp, payload_len,
1696 len, plcp_signal, short_preamble);
1697 txhdr->plcp_frag_head_len = cpu_to_le16(plcp);
1698 txhdr->plcp_frag_tail_len = cpu_to_le16(plcp);
1699 txhdr->dur_frag_head = cpu_to_le16(dur);
1700 txhdr->dur_frag_tail = cpu_to_le16(dur);
1701
1702 txhdr->header_control = cpu_to_le16(ADM8211_TXHDRCTL_ENABLE_EXTEND_HEADER);
1703
1704 if (short_preamble)
1705 txhdr->header_control |= cpu_to_le16(ADM8211_TXHDRCTL_SHORT_PREAMBLE);
1706
1707 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS)
1708 txhdr->header_control |= cpu_to_le16(ADM8211_TXHDRCTL_ENABLE_RTS);
1709
1710 txhdr->retry_limit = info->control.rates[0].count;
1711
1712 adm8211_tx_raw(dev, skb, plcp_signal, hdrlen);
1713 }
1714
adm8211_alloc_rings(struct ieee80211_hw * dev)1715 static int adm8211_alloc_rings(struct ieee80211_hw *dev)
1716 {
1717 struct adm8211_priv *priv = dev->priv;
1718 unsigned int ring_size;
1719
1720 priv->rx_buffers = kmalloc(sizeof(*priv->rx_buffers) * priv->rx_ring_size +
1721 sizeof(*priv->tx_buffers) * priv->tx_ring_size, GFP_KERNEL);
1722 if (!priv->rx_buffers)
1723 return -ENOMEM;
1724
1725 priv->tx_buffers = (void *)priv->rx_buffers +
1726 sizeof(*priv->rx_buffers) * priv->rx_ring_size;
1727
1728 /* Allocate TX/RX descriptors */
1729 ring_size = sizeof(struct adm8211_desc) * priv->rx_ring_size +
1730 sizeof(struct adm8211_desc) * priv->tx_ring_size;
1731 priv->rx_ring = pci_alloc_consistent(priv->pdev, ring_size,
1732 &priv->rx_ring_dma);
1733
1734 if (!priv->rx_ring) {
1735 kfree(priv->rx_buffers);
1736 priv->rx_buffers = NULL;
1737 priv->tx_buffers = NULL;
1738 return -ENOMEM;
1739 }
1740
1741 priv->tx_ring = (struct adm8211_desc *)(priv->rx_ring +
1742 priv->rx_ring_size);
1743 priv->tx_ring_dma = priv->rx_ring_dma +
1744 sizeof(struct adm8211_desc) * priv->rx_ring_size;
1745
1746 return 0;
1747 }
1748
1749 static const struct ieee80211_ops adm8211_ops = {
1750 .tx = adm8211_tx,
1751 .start = adm8211_start,
1752 .stop = adm8211_stop,
1753 .add_interface = adm8211_add_interface,
1754 .remove_interface = adm8211_remove_interface,
1755 .config = adm8211_config,
1756 .bss_info_changed = adm8211_bss_info_changed,
1757 .prepare_multicast = adm8211_prepare_multicast,
1758 .configure_filter = adm8211_configure_filter,
1759 .get_stats = adm8211_get_stats,
1760 .get_tsf = adm8211_get_tsft
1761 };
1762
adm8211_probe(struct pci_dev * pdev,const struct pci_device_id * id)1763 static int __devinit adm8211_probe(struct pci_dev *pdev,
1764 const struct pci_device_id *id)
1765 {
1766 struct ieee80211_hw *dev;
1767 struct adm8211_priv *priv;
1768 unsigned long mem_addr, mem_len;
1769 unsigned int io_addr, io_len;
1770 int err;
1771 u32 reg;
1772 u8 perm_addr[ETH_ALEN];
1773
1774 err = pci_enable_device(pdev);
1775 if (err) {
1776 printk(KERN_ERR "%s (adm8211): Cannot enable new PCI device\n",
1777 pci_name(pdev));
1778 return err;
1779 }
1780
1781 io_addr = pci_resource_start(pdev, 0);
1782 io_len = pci_resource_len(pdev, 0);
1783 mem_addr = pci_resource_start(pdev, 1);
1784 mem_len = pci_resource_len(pdev, 1);
1785 if (io_len < 256 || mem_len < 1024) {
1786 printk(KERN_ERR "%s (adm8211): Too short PCI resources\n",
1787 pci_name(pdev));
1788 goto err_disable_pdev;
1789 }
1790
1791
1792 /* check signature */
1793 pci_read_config_dword(pdev, 0x80 /* CR32 */, ®);
1794 if (reg != ADM8211_SIG1 && reg != ADM8211_SIG2) {
1795 printk(KERN_ERR "%s (adm8211): Invalid signature (0x%x)\n",
1796 pci_name(pdev), reg);
1797 goto err_disable_pdev;
1798 }
1799
1800 err = pci_request_regions(pdev, "adm8211");
1801 if (err) {
1802 printk(KERN_ERR "%s (adm8211): Cannot obtain PCI resources\n",
1803 pci_name(pdev));
1804 return err; /* someone else grabbed it? don't disable it */
1805 }
1806
1807 if (pci_set_dma_mask(pdev, DMA_BIT_MASK(32)) ||
1808 pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32))) {
1809 printk(KERN_ERR "%s (adm8211): No suitable DMA available\n",
1810 pci_name(pdev));
1811 goto err_free_reg;
1812 }
1813
1814 pci_set_master(pdev);
1815
1816 dev = ieee80211_alloc_hw(sizeof(*priv), &adm8211_ops);
1817 if (!dev) {
1818 printk(KERN_ERR "%s (adm8211): ieee80211 alloc failed\n",
1819 pci_name(pdev));
1820 err = -ENOMEM;
1821 goto err_free_reg;
1822 }
1823 priv = dev->priv;
1824 priv->pdev = pdev;
1825
1826 spin_lock_init(&priv->lock);
1827
1828 SET_IEEE80211_DEV(dev, &pdev->dev);
1829
1830 pci_set_drvdata(pdev, dev);
1831
1832 priv->map = pci_iomap(pdev, 1, mem_len);
1833 if (!priv->map)
1834 priv->map = pci_iomap(pdev, 0, io_len);
1835
1836 if (!priv->map) {
1837 printk(KERN_ERR "%s (adm8211): Cannot map device memory\n",
1838 pci_name(pdev));
1839 goto err_free_dev;
1840 }
1841
1842 priv->rx_ring_size = rx_ring_size;
1843 priv->tx_ring_size = tx_ring_size;
1844
1845 if (adm8211_alloc_rings(dev)) {
1846 printk(KERN_ERR "%s (adm8211): Cannot allocate TX/RX ring\n",
1847 pci_name(pdev));
1848 goto err_iounmap;
1849 }
1850
1851 *(__le32 *)perm_addr = cpu_to_le32(ADM8211_CSR_READ(PAR0));
1852 *(__le16 *)&perm_addr[4] =
1853 cpu_to_le16(ADM8211_CSR_READ(PAR1) & 0xFFFF);
1854
1855 if (!is_valid_ether_addr(perm_addr)) {
1856 printk(KERN_WARNING "%s (adm8211): Invalid hwaddr in EEPROM!\n",
1857 pci_name(pdev));
1858 random_ether_addr(perm_addr);
1859 }
1860 SET_IEEE80211_PERM_ADDR(dev, perm_addr);
1861
1862 dev->extra_tx_headroom = sizeof(struct adm8211_tx_hdr);
1863 /* dev->flags = IEEE80211_HW_RX_INCLUDES_FCS in promisc mode */
1864 dev->flags = IEEE80211_HW_SIGNAL_UNSPEC;
1865 dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1866
1867 dev->channel_change_time = 1000;
1868 dev->max_signal = 100; /* FIXME: find better value */
1869
1870 dev->queues = 1; /* ADM8211C supports more, maybe ADM8211B too */
1871
1872 priv->retry_limit = 3;
1873 priv->ant_power = 0x40;
1874 priv->tx_power = 0x40;
1875 priv->lpf_cutoff = 0xFF;
1876 priv->lnags_threshold = 0xFF;
1877 priv->mode = NL80211_IFTYPE_UNSPECIFIED;
1878
1879 /* Power-on issue. EEPROM won't read correctly without */
1880 if (pdev->revision >= ADM8211_REV_BA) {
1881 ADM8211_CSR_WRITE(FRCTL, 0);
1882 ADM8211_CSR_READ(FRCTL);
1883 ADM8211_CSR_WRITE(FRCTL, 1);
1884 ADM8211_CSR_READ(FRCTL);
1885 msleep(100);
1886 }
1887
1888 err = adm8211_read_eeprom(dev);
1889 if (err) {
1890 printk(KERN_ERR "%s (adm8211): Can't alloc eeprom buffer\n",
1891 pci_name(pdev));
1892 goto err_free_desc;
1893 }
1894
1895 priv->channel = 1;
1896
1897 dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
1898
1899 err = ieee80211_register_hw(dev);
1900 if (err) {
1901 printk(KERN_ERR "%s (adm8211): Cannot register device\n",
1902 pci_name(pdev));
1903 goto err_free_eeprom;
1904 }
1905
1906 wiphy_info(dev->wiphy, "hwaddr %pM, Rev 0x%02x\n",
1907 dev->wiphy->perm_addr, pdev->revision);
1908
1909 return 0;
1910
1911 err_free_eeprom:
1912 kfree(priv->eeprom);
1913
1914 err_free_desc:
1915 pci_free_consistent(pdev,
1916 sizeof(struct adm8211_desc) * priv->rx_ring_size +
1917 sizeof(struct adm8211_desc) * priv->tx_ring_size,
1918 priv->rx_ring, priv->rx_ring_dma);
1919 kfree(priv->rx_buffers);
1920
1921 err_iounmap:
1922 pci_iounmap(pdev, priv->map);
1923
1924 err_free_dev:
1925 pci_set_drvdata(pdev, NULL);
1926 ieee80211_free_hw(dev);
1927
1928 err_free_reg:
1929 pci_release_regions(pdev);
1930
1931 err_disable_pdev:
1932 pci_disable_device(pdev);
1933 return err;
1934 }
1935
1936
adm8211_remove(struct pci_dev * pdev)1937 static void __devexit adm8211_remove(struct pci_dev *pdev)
1938 {
1939 struct ieee80211_hw *dev = pci_get_drvdata(pdev);
1940 struct adm8211_priv *priv;
1941
1942 if (!dev)
1943 return;
1944
1945 ieee80211_unregister_hw(dev);
1946
1947 priv = dev->priv;
1948
1949 pci_free_consistent(pdev,
1950 sizeof(struct adm8211_desc) * priv->rx_ring_size +
1951 sizeof(struct adm8211_desc) * priv->tx_ring_size,
1952 priv->rx_ring, priv->rx_ring_dma);
1953
1954 kfree(priv->rx_buffers);
1955 kfree(priv->eeprom);
1956 pci_iounmap(pdev, priv->map);
1957 pci_release_regions(pdev);
1958 pci_disable_device(pdev);
1959 ieee80211_free_hw(dev);
1960 }
1961
1962
1963 #ifdef CONFIG_PM
adm8211_suspend(struct pci_dev * pdev,pm_message_t state)1964 static int adm8211_suspend(struct pci_dev *pdev, pm_message_t state)
1965 {
1966 pci_save_state(pdev);
1967 pci_set_power_state(pdev, pci_choose_state(pdev, state));
1968 return 0;
1969 }
1970
adm8211_resume(struct pci_dev * pdev)1971 static int adm8211_resume(struct pci_dev *pdev)
1972 {
1973 pci_set_power_state(pdev, PCI_D0);
1974 pci_restore_state(pdev);
1975 return 0;
1976 }
1977 #endif /* CONFIG_PM */
1978
1979
1980 MODULE_DEVICE_TABLE(pci, adm8211_pci_id_table);
1981
1982 /* TODO: implement enable_wake */
1983 static struct pci_driver adm8211_driver = {
1984 .name = "adm8211",
1985 .id_table = adm8211_pci_id_table,
1986 .probe = adm8211_probe,
1987 .remove = __devexit_p(adm8211_remove),
1988 #ifdef CONFIG_PM
1989 .suspend = adm8211_suspend,
1990 .resume = adm8211_resume,
1991 #endif /* CONFIG_PM */
1992 };
1993
1994
1995
adm8211_init(void)1996 static int __init adm8211_init(void)
1997 {
1998 return pci_register_driver(&adm8211_driver);
1999 }
2000
2001
adm8211_exit(void)2002 static void __exit adm8211_exit(void)
2003 {
2004 pci_unregister_driver(&adm8211_driver);
2005 }
2006
2007
2008 module_init(adm8211_init);
2009 module_exit(adm8211_exit);
2010