1 
2 /* Linux device driver for RTL8180 / RTL8185 / RTL8187SE
3  *
4  * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
5  * Copyright 2007,2014 Andrea Merello <andrea.merello@gmail.com>
6  *
7  * Based on the r8180 driver, which is:
8  * Copyright 2004-2005 Andrea Merello <andrea.merello@gmail.com>, et al.
9  *
10  * Thanks to Realtek for their support!
11  *
12  ************************************************************************
13  *
14  * The driver was extended to the RTL8187SE in 2014 by
15  * Andrea Merello <andrea.merello@gmail.com>
16  *
17  * based also on:
18  *  - portions of rtl8187se Linux staging driver, Copyright Realtek corp.
19  *    (available in drivers/staging/rtl8187se directory of Linux 3.14)
20  *  - other GPL, unpublished (until now), Linux driver code,
21  *    Copyright Larry Finger <Larry.Finger@lwfinger.net>
22  *
23  * A huge thanks goes to Sara V. Nari who forgives me when I'm
24  * sitting in front of my laptop at evening, week-end, night...
25  *
26  * A special thanks goes to Antonio Cuni, who helped me with
27  * some python userspace stuff I used to debug RTL8187SE code, and who
28  * bought a laptop with an unsupported Wi-Fi card some years ago...
29  *
30  * Thanks to Larry Finger for writing some code for rtl8187se and for
31  * his suggestions.
32  *
33  * Thanks to Dan Carpenter for reviewing my initial patch and for his
34  * suggestions.
35  *
36  * Thanks to Bernhard Schiffner for his help in testing and for his
37  * suggestions.
38  *
39  ************************************************************************
40  *
41  * This program is free software; you can redistribute it and/or modify
42  * it under the terms of the GNU General Public License version 2 as
43  * published by the Free Software Foundation.
44  */
45 
46 #include <linux/interrupt.h>
47 #include <linux/pci.h>
48 #include <linux/slab.h>
49 #include <linux/delay.h>
50 #include <linux/etherdevice.h>
51 #include <linux/eeprom_93cx6.h>
52 #include <linux/module.h>
53 #include <net/mac80211.h>
54 
55 #include "rtl8180.h"
56 #include "rtl8225.h"
57 #include "sa2400.h"
58 #include "max2820.h"
59 #include "grf5101.h"
60 #include "rtl8225se.h"
61 
62 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
63 MODULE_AUTHOR("Andrea Merello <andrea.merello@gmail.com>");
64 MODULE_DESCRIPTION("RTL8180 / RTL8185 / RTL8187SE PCI wireless driver");
65 MODULE_LICENSE("GPL");
66 
67 static const struct pci_device_id rtl8180_table[] = {
68 
69 	/* rtl8187se */
70 	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8199) },
71 
72 	/* rtl8185 */
73 	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8185) },
74 	{ PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x700f) },
75 	{ PCI_DEVICE(PCI_VENDOR_ID_BELKIN, 0x701f) },
76 
77 	/* rtl8180 */
78 	{ PCI_DEVICE(PCI_VENDOR_ID_REALTEK, 0x8180) },
79 	{ PCI_DEVICE(0x1799, 0x6001) },
80 	{ PCI_DEVICE(0x1799, 0x6020) },
81 	{ PCI_DEVICE(PCI_VENDOR_ID_DLINK, 0x3300) },
82 	{ PCI_DEVICE(0x1186, 0x3301) },
83 	{ PCI_DEVICE(0x1432, 0x7106) },
84 	{ }
85 };
86 
87 MODULE_DEVICE_TABLE(pci, rtl8180_table);
88 
89 static const struct ieee80211_rate rtl818x_rates[] = {
90 	{ .bitrate = 10, .hw_value = 0, },
91 	{ .bitrate = 20, .hw_value = 1, },
92 	{ .bitrate = 55, .hw_value = 2, },
93 	{ .bitrate = 110, .hw_value = 3, },
94 	{ .bitrate = 60, .hw_value = 4, },
95 	{ .bitrate = 90, .hw_value = 5, },
96 	{ .bitrate = 120, .hw_value = 6, },
97 	{ .bitrate = 180, .hw_value = 7, },
98 	{ .bitrate = 240, .hw_value = 8, },
99 	{ .bitrate = 360, .hw_value = 9, },
100 	{ .bitrate = 480, .hw_value = 10, },
101 	{ .bitrate = 540, .hw_value = 11, },
102 };
103 
104 static const struct ieee80211_channel rtl818x_channels[] = {
105 	{ .center_freq = 2412 },
106 	{ .center_freq = 2417 },
107 	{ .center_freq = 2422 },
108 	{ .center_freq = 2427 },
109 	{ .center_freq = 2432 },
110 	{ .center_freq = 2437 },
111 	{ .center_freq = 2442 },
112 	{ .center_freq = 2447 },
113 	{ .center_freq = 2452 },
114 	{ .center_freq = 2457 },
115 	{ .center_freq = 2462 },
116 	{ .center_freq = 2467 },
117 	{ .center_freq = 2472 },
118 	{ .center_freq = 2484 },
119 };
120 
121 /* Queues for rtl8187se card
122  *
123  * name | reg  |  queue
124  *  BC  |  7   |   6
125  *  MG  |  1   |   0
126  *  HI  |  6   |   1
127  *  VO  |  5   |   2
128  *  VI  |  4   |   3
129  *  BE  |  3   |   4
130  *  BK  |  2   |   5
131  *
132  * The complete map for DMA kick reg using use all queue is:
133  * static const int rtl8187se_queues_map[RTL8187SE_NR_TX_QUEUES] =
134  *	{1, 6, 5, 4, 3, 2, 7};
135  *
136  * .. but.. Because for mac80211 4 queues are enough for QoS we use this
137  *
138  * name | reg  |  queue
139  *  BC  |  7   |   4  <- currently not used yet
140  *  MG  |  1   |   x  <- Not used
141  *  HI  |  6   |   x  <- Not used
142  *  VO  |  5   |   0  <- used
143  *  VI  |  4   |   1  <- used
144  *  BE  |  3   |   2  <- used
145  *  BK  |  2   |   3  <- used
146  *
147  * Beacon queue could be used, but this is not finished yet.
148  *
149  * I thougth about using the other two queues but I decided not to do this:
150  *
151  * - I'm unsure whether the mac80211 will ever try to use more than 4 queues
152  *   by itself.
153  *
154  * - I could route MGMT frames (currently sent over VO queue) to the MGMT
155  *   queue but since mac80211 will do not know about it, I will probably gain
156  *   some HW priority whenever the VO queue is not empty, but this gain is
157  *   limited by the fact that I had to stop the mac80211 queue whenever one of
158  *   the VO or MGMT queues is full, stopping also submitting of MGMT frame
159  *   to the driver.
160  *
161  * - I don't know how to set in the HW the contention window params for MGMT
162  *   and HI-prio queues.
163  */
164 
165 static const int rtl8187se_queues_map[RTL8187SE_NR_TX_QUEUES] = {5, 4, 3, 2, 7};
166 
167 /* Queues for rtl8180/rtl8185 cards
168  *
169  * name | reg  |  prio
170  *  BC  |  7   |   3
171  *  HI  |  6   |   0
172  *  NO  |  5   |   1
173  *  LO  |  4   |   2
174  *
175  * The complete map for DMA kick reg using all queue is:
176  * static const int rtl8180_queues_map[RTL8180_NR_TX_QUEUES] = {6, 5, 4, 7};
177  *
178  * .. but .. Because the mac80211 needs at least 4 queues for QoS or
179  * otherwise QoS can't be done, we use just one.
180  * Beacon queue could be used, but this is not finished yet.
181  * Actual map is:
182  *
183  * name | reg  |  prio
184  *  BC  |  7   |   1  <- currently not used yet.
185  *  HI  |  6   |   x  <- not used
186  *  NO  |  5   |   x  <- not used
187  *  LO  |  4   |   0  <- used
188  */
189 
190 static const int rtl8180_queues_map[RTL8180_NR_TX_QUEUES] = {4, 7};
191 
192 /* LNA gain table for rtl8187se */
193 static const u8 rtl8187se_lna_gain[4] = {02, 17, 29, 39};
194 
195 void rtl8180_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
196 {
197 	struct rtl8180_priv *priv = dev->priv;
198 	int i = 10;
199 	u32 buf;
200 
201 	buf = (data << 8) | addr;
202 
203 	rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf | 0x80);
204 	while (i--) {
205 		rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->PHY[0], buf);
206 		if (rtl818x_ioread8(priv, &priv->map->PHY[2]) == (data & 0xFF))
207 			return;
208 	}
209 }
210 
211 static void rtl8180_handle_rx(struct ieee80211_hw *dev)
212 {
213 	struct rtl8180_priv *priv = dev->priv;
214 	struct rtl818x_rx_cmd_desc *cmd_desc;
215 	unsigned int count = 32;
216 	u8 agc, sq;
217 	s8 signal = 1;
218 	dma_addr_t mapping;
219 
220 	while (count--) {
221 		void *entry = priv->rx_ring + priv->rx_idx * priv->rx_ring_sz;
222 		struct sk_buff *skb = priv->rx_buf[priv->rx_idx];
223 		u32 flags, flags2, flags3 = 0;
224 		u64 tsft;
225 
226 		if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
227 			struct rtl8187se_rx_desc *desc = entry;
228 
229 			flags = le32_to_cpu(desc->flags);
230 			/* if ownership flag is set, then we can trust the
231 			 * HW has written other fields. We must not trust
232 			 * other descriptor data read before we checked (read)
233 			 * the ownership flag
234 			 */
235 			rmb();
236 			flags3 = le32_to_cpu(desc->flags3);
237 			flags2 = le32_to_cpu(desc->flags2);
238 			tsft = le64_to_cpu(desc->tsft);
239 		} else {
240 			struct rtl8180_rx_desc *desc = entry;
241 
242 			flags = le32_to_cpu(desc->flags);
243 			/* same as above */
244 			rmb();
245 			flags2 = le32_to_cpu(desc->flags2);
246 			tsft = le64_to_cpu(desc->tsft);
247 		}
248 
249 		if (flags & RTL818X_RX_DESC_FLAG_OWN)
250 			return;
251 
252 		if (unlikely(flags & (RTL818X_RX_DESC_FLAG_DMA_FAIL |
253 				      RTL818X_RX_DESC_FLAG_FOF |
254 				      RTL818X_RX_DESC_FLAG_RX_ERR)))
255 			goto done;
256 		else {
257 			struct ieee80211_rx_status rx_status = {0};
258 			struct sk_buff *new_skb = dev_alloc_skb(MAX_RX_SIZE);
259 
260 			if (unlikely(!new_skb))
261 				goto done;
262 
263 			mapping = dma_map_single(&priv->pdev->dev,
264 						 skb_tail_pointer(new_skb),
265 						 MAX_RX_SIZE, DMA_FROM_DEVICE);
266 
267 			if (dma_mapping_error(&priv->pdev->dev, mapping)) {
268 				kfree_skb(new_skb);
269 				dev_err(&priv->pdev->dev, "RX DMA map error\n");
270 
271 				goto done;
272 			}
273 
274 			dma_unmap_single(&priv->pdev->dev,
275 					 *((dma_addr_t *)skb->cb),
276 					 MAX_RX_SIZE, DMA_FROM_DEVICE);
277 			skb_put(skb, flags & 0xFFF);
278 
279 			rx_status.antenna = (flags2 >> 15) & 1;
280 			rx_status.rate_idx = (flags >> 20) & 0xF;
281 			agc = (flags2 >> 17) & 0x7F;
282 
283 			switch (priv->chip_family) {
284 			case RTL818X_CHIP_FAMILY_RTL8185:
285 				if (rx_status.rate_idx > 3)
286 					signal = -clamp_t(u8, agc, 25, 90) - 9;
287 				else
288 					signal = -clamp_t(u8, agc, 30, 95);
289 				break;
290 			case RTL818X_CHIP_FAMILY_RTL8180:
291 				sq = flags2 & 0xff;
292 				signal = priv->rf->calc_rssi(agc, sq);
293 				break;
294 			case RTL818X_CHIP_FAMILY_RTL8187SE:
295 				/* OFDM measure reported by HW is signed,
296 				 * in 0.5dBm unit, with zero centered @ -41dBm
297 				 * input signal.
298 				 */
299 				if (rx_status.rate_idx > 3) {
300 					signal = (s8)((flags3 >> 16) & 0xff);
301 					signal = signal / 2 - 41;
302 				} else {
303 					int idx, bb;
304 
305 					idx = (agc & 0x60) >> 5;
306 					bb = (agc & 0x1F) * 2;
307 					/* bias + BB gain + LNA gain */
308 					signal = 4 - bb - rtl8187se_lna_gain[idx];
309 				}
310 				break;
311 			}
312 			rx_status.signal = signal;
313 			rx_status.freq = dev->conf.chandef.chan->center_freq;
314 			rx_status.band = dev->conf.chandef.chan->band;
315 			rx_status.mactime = tsft;
316 			rx_status.flag |= RX_FLAG_MACTIME_START;
317 			if (flags & RTL818X_RX_DESC_FLAG_SPLCP)
318 				rx_status.enc_flags |= RX_ENC_FLAG_SHORTPRE;
319 			if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR)
320 				rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
321 
322 			memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
323 			ieee80211_rx_irqsafe(dev, skb);
324 
325 			skb = new_skb;
326 			priv->rx_buf[priv->rx_idx] = skb;
327 			*((dma_addr_t *) skb->cb) = mapping;
328 		}
329 
330 	done:
331 		cmd_desc = entry;
332 		cmd_desc->rx_buf = cpu_to_le32(*((dma_addr_t *)skb->cb));
333 		cmd_desc->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
334 					   MAX_RX_SIZE);
335 		if (priv->rx_idx == 31)
336 			cmd_desc->flags |=
337 				cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
338 		priv->rx_idx = (priv->rx_idx + 1) % 32;
339 	}
340 }
341 
342 static void rtl8180_handle_tx(struct ieee80211_hw *dev, unsigned int prio)
343 {
344 	struct rtl8180_priv *priv = dev->priv;
345 	struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];
346 
347 	while (skb_queue_len(&ring->queue)) {
348 		struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
349 		struct sk_buff *skb;
350 		struct ieee80211_tx_info *info;
351 		u32 flags = le32_to_cpu(entry->flags);
352 
353 		if (flags & RTL818X_TX_DESC_FLAG_OWN)
354 			return;
355 
356 		ring->idx = (ring->idx + 1) % ring->entries;
357 		skb = __skb_dequeue(&ring->queue);
358 		dma_unmap_single(&priv->pdev->dev, le32_to_cpu(entry->tx_buf),
359 				 skb->len, DMA_TO_DEVICE);
360 
361 		info = IEEE80211_SKB_CB(skb);
362 		ieee80211_tx_info_clear_status(info);
363 
364 		if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
365 		    (flags & RTL818X_TX_DESC_FLAG_TX_OK))
366 			info->flags |= IEEE80211_TX_STAT_ACK;
367 
368 		info->status.rates[0].count = (flags & 0xFF) + 1;
369 
370 		ieee80211_tx_status_irqsafe(dev, skb);
371 		if (ring->entries - skb_queue_len(&ring->queue) == 2)
372 			ieee80211_wake_queue(dev, prio);
373 	}
374 }
375 
376 static irqreturn_t rtl8187se_interrupt(int irq, void *dev_id)
377 {
378 	struct ieee80211_hw *dev = dev_id;
379 	struct rtl8180_priv *priv = dev->priv;
380 	u32 reg;
381 	unsigned long flags;
382 	static int desc_err;
383 
384 	spin_lock_irqsave(&priv->lock, flags);
385 	/* Note: 32-bit interrupt status */
386 	reg = rtl818x_ioread32(priv, &priv->map->INT_STATUS_SE);
387 	if (unlikely(reg == 0xFFFFFFFF)) {
388 		spin_unlock_irqrestore(&priv->lock, flags);
389 		return IRQ_HANDLED;
390 	}
391 
392 	rtl818x_iowrite32(priv, &priv->map->INT_STATUS_SE, reg);
393 
394 	if (reg & IMR_TIMEOUT1)
395 		rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
396 
397 	if (reg & (IMR_TBDOK | IMR_TBDER))
398 		rtl8180_handle_tx(dev, 4);
399 
400 	if (reg & (IMR_TVODOK | IMR_TVODER))
401 		rtl8180_handle_tx(dev, 0);
402 
403 	if (reg & (IMR_TVIDOK | IMR_TVIDER))
404 		rtl8180_handle_tx(dev, 1);
405 
406 	if (reg & (IMR_TBEDOK | IMR_TBEDER))
407 		rtl8180_handle_tx(dev, 2);
408 
409 	if (reg & (IMR_TBKDOK | IMR_TBKDER))
410 		rtl8180_handle_tx(dev, 3);
411 
412 	if (reg & (IMR_ROK | IMR_RER | RTL818X_INT_SE_RX_DU | IMR_RQOSOK))
413 		rtl8180_handle_rx(dev);
414 	/* The interface sometimes generates several RX DMA descriptor errors
415 	 * at startup. Do not report these.
416 	 */
417 	if ((reg & RTL818X_INT_SE_RX_DU) && desc_err++ > 2)
418 		if (net_ratelimit())
419 			wiphy_err(dev->wiphy, "No RX DMA Descriptor avail\n");
420 
421 	spin_unlock_irqrestore(&priv->lock, flags);
422 	return IRQ_HANDLED;
423 }
424 
425 static irqreturn_t rtl8180_interrupt(int irq, void *dev_id)
426 {
427 	struct ieee80211_hw *dev = dev_id;
428 	struct rtl8180_priv *priv = dev->priv;
429 	u16 reg;
430 
431 	spin_lock(&priv->lock);
432 	reg = rtl818x_ioread16(priv, &priv->map->INT_STATUS);
433 	if (unlikely(reg == 0xFFFF)) {
434 		spin_unlock(&priv->lock);
435 		return IRQ_HANDLED;
436 	}
437 
438 	rtl818x_iowrite16(priv, &priv->map->INT_STATUS, reg);
439 
440 	if (reg & (RTL818X_INT_TXB_OK | RTL818X_INT_TXB_ERR))
441 		rtl8180_handle_tx(dev, 1);
442 
443 	if (reg & (RTL818X_INT_TXL_OK | RTL818X_INT_TXL_ERR))
444 		rtl8180_handle_tx(dev, 0);
445 
446 	if (reg & (RTL818X_INT_RX_OK | RTL818X_INT_RX_ERR))
447 		rtl8180_handle_rx(dev);
448 
449 	spin_unlock(&priv->lock);
450 
451 	return IRQ_HANDLED;
452 }
453 
454 static void rtl8180_tx(struct ieee80211_hw *dev,
455 		       struct ieee80211_tx_control *control,
456 		       struct sk_buff *skb)
457 {
458 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
459 	struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
460 	struct rtl8180_priv *priv = dev->priv;
461 	struct rtl8180_tx_ring *ring;
462 	struct rtl8180_tx_desc *entry;
463 	unsigned int prio = 0;
464 	unsigned long flags;
465 	unsigned int idx, hw_prio;
466 
467 	dma_addr_t mapping;
468 	u32 tx_flags;
469 	u8 rc_flags;
470 	u16 plcp_len = 0;
471 	__le16 rts_duration = 0;
472 	/* do arithmetic and then convert to le16 */
473 	u16 frame_duration = 0;
474 
475 	/* rtl8180/rtl8185 only has one useable tx queue */
476 	if (dev->queues > IEEE80211_AC_BK)
477 		prio = skb_get_queue_mapping(skb);
478 	ring = &priv->tx_ring[prio];
479 
480 	mapping = dma_map_single(&priv->pdev->dev, skb->data, skb->len,
481 				 DMA_TO_DEVICE);
482 
483 	if (dma_mapping_error(&priv->pdev->dev, mapping)) {
484 		kfree_skb(skb);
485 		dev_err(&priv->pdev->dev, "TX DMA mapping error\n");
486 		return;
487 	}
488 
489 	tx_flags = RTL818X_TX_DESC_FLAG_OWN | RTL818X_TX_DESC_FLAG_FS |
490 		   RTL818X_TX_DESC_FLAG_LS |
491 		   (ieee80211_get_tx_rate(dev, info)->hw_value << 24) |
492 		   skb->len;
493 
494 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
495 		tx_flags |= RTL818X_TX_DESC_FLAG_DMA |
496 			    RTL818X_TX_DESC_FLAG_NO_ENC;
497 
498 	rc_flags = info->control.rates[0].flags;
499 
500 	/* HW will perform RTS-CTS when only RTS flags is set.
501 	 * HW will perform CTS-to-self when both RTS and CTS flags are set.
502 	 * RTS rate and RTS duration will be used also for CTS-to-self.
503 	 */
504 	if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
505 		tx_flags |= RTL818X_TX_DESC_FLAG_RTS;
506 		tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
507 		rts_duration = ieee80211_rts_duration(dev, priv->vif,
508 						skb->len, info);
509 	} else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
510 		tx_flags |= RTL818X_TX_DESC_FLAG_RTS | RTL818X_TX_DESC_FLAG_CTS;
511 		tx_flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
512 		rts_duration = ieee80211_ctstoself_duration(dev, priv->vif,
513 						skb->len, info);
514 	}
515 
516 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
517 		unsigned int remainder;
518 
519 		plcp_len = DIV_ROUND_UP(16 * (skb->len + 4),
520 				(ieee80211_get_tx_rate(dev, info)->bitrate * 2) / 10);
521 		remainder = (16 * (skb->len + 4)) %
522 			    ((ieee80211_get_tx_rate(dev, info)->bitrate * 2) / 10);
523 		if (remainder <= 6)
524 			plcp_len |= 1 << 15;
525 	}
526 
527 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
528 		__le16 duration;
529 		/* SIFS time (required by HW) is already included by
530 		 * ieee80211_generic_frame_duration
531 		 */
532 		duration = ieee80211_generic_frame_duration(dev, priv->vif,
533 					NL80211_BAND_2GHZ, skb->len,
534 					ieee80211_get_tx_rate(dev, info));
535 
536 		frame_duration =  priv->ack_time + le16_to_cpu(duration);
537 	}
538 
539 	spin_lock_irqsave(&priv->lock, flags);
540 
541 	if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
542 		if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
543 			priv->seqno += 0x10;
544 		hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
545 		hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
546 	}
547 
548 	idx = (ring->idx + skb_queue_len(&ring->queue)) % ring->entries;
549 	entry = &ring->desc[idx];
550 
551 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
552 		entry->frame_duration = cpu_to_le16(frame_duration);
553 		entry->frame_len_se = cpu_to_le16(skb->len);
554 
555 		/* tpc polarity */
556 		entry->flags3 = cpu_to_le16(1<<4);
557 	} else
558 		entry->frame_len = cpu_to_le32(skb->len);
559 
560 	entry->rts_duration = rts_duration;
561 	entry->plcp_len = cpu_to_le16(plcp_len);
562 	entry->tx_buf = cpu_to_le32(mapping);
563 
564 	entry->retry_limit = info->control.rates[0].count - 1;
565 
566 	/* We must be sure that tx_flags is written last because the HW
567 	 * looks at it to check if the rest of data is valid or not
568 	 */
569 	wmb();
570 	entry->flags = cpu_to_le32(tx_flags);
571 	/* We must be sure this has been written before followings HW
572 	 * register write, because this write will made the HW attempts
573 	 * to DMA the just-written data
574 	 */
575 	wmb();
576 
577 	__skb_queue_tail(&ring->queue, skb);
578 	if (ring->entries - skb_queue_len(&ring->queue) < 2)
579 		ieee80211_stop_queue(dev, prio);
580 
581 	spin_unlock_irqrestore(&priv->lock, flags);
582 
583 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
584 		/* just poll: rings are stopped with TPPollStop reg */
585 		hw_prio = rtl8187se_queues_map[prio];
586 		rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
587 			 (1 << hw_prio));
588 	} else {
589 		hw_prio = rtl8180_queues_map[prio];
590 		rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
591 			 (1 << hw_prio) | /* ring to poll  */
592 			 (1<<1) | (1<<2));/* stopped rings */
593 	}
594 }
595 
596 static void rtl8180_set_anaparam3(struct rtl8180_priv *priv, u16 anaparam3)
597 {
598 	u8 reg;
599 
600 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
601 			 RTL818X_EEPROM_CMD_CONFIG);
602 
603 	reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
604 	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
605 		 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
606 
607 	rtl818x_iowrite16(priv, &priv->map->ANAPARAM3, anaparam3);
608 
609 	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
610 		 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
611 
612 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
613 			 RTL818X_EEPROM_CMD_NORMAL);
614 }
615 
616 void rtl8180_set_anaparam2(struct rtl8180_priv *priv, u32 anaparam2)
617 {
618 	u8 reg;
619 
620 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
621 			 RTL818X_EEPROM_CMD_CONFIG);
622 
623 	reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
624 	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
625 		 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
626 
627 	rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, anaparam2);
628 
629 	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
630 		 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
631 
632 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
633 			 RTL818X_EEPROM_CMD_NORMAL);
634 }
635 
636 void rtl8180_set_anaparam(struct rtl8180_priv *priv, u32 anaparam)
637 {
638 	u8 reg;
639 
640 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
641 	reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
642 	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
643 		 reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
644 	rtl818x_iowrite32(priv, &priv->map->ANAPARAM, anaparam);
645 	rtl818x_iowrite8(priv, &priv->map->CONFIG3,
646 		 reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
647 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
648 }
649 
650 static void rtl8187se_mac_config(struct ieee80211_hw *dev)
651 {
652 	struct rtl8180_priv *priv = dev->priv;
653 	u8 reg;
654 
655 	rtl818x_iowrite32(priv, REG_ADDR4(0x1F0), 0);
656 	rtl818x_ioread32(priv, REG_ADDR4(0x1F0));
657 	rtl818x_iowrite32(priv, REG_ADDR4(0x1F4), 0);
658 	rtl818x_ioread32(priv, REG_ADDR4(0x1F4));
659 	rtl818x_iowrite8(priv, REG_ADDR1(0x1F8), 0);
660 	rtl818x_ioread8(priv, REG_ADDR1(0x1F8));
661 	/* Enable DA10 TX power saving */
662 	reg = rtl818x_ioread8(priv, &priv->map->PHY_PR);
663 	rtl818x_iowrite8(priv, &priv->map->PHY_PR, reg | 0x04);
664 	/* Power */
665 	rtl818x_iowrite16(priv, PI_DATA_REG, 0x1000);
666 	rtl818x_iowrite16(priv, SI_DATA_REG, 0x1000);
667 	/* AFE - default to power ON */
668 	rtl818x_iowrite16(priv, REG_ADDR2(0x370), 0x0560);
669 	rtl818x_iowrite16(priv, REG_ADDR2(0x372), 0x0560);
670 	rtl818x_iowrite16(priv, REG_ADDR2(0x374), 0x0DA4);
671 	rtl818x_iowrite16(priv, REG_ADDR2(0x376), 0x0DA4);
672 	rtl818x_iowrite16(priv, REG_ADDR2(0x378), 0x0560);
673 	rtl818x_iowrite16(priv, REG_ADDR2(0x37A), 0x0560);
674 	rtl818x_iowrite16(priv, REG_ADDR2(0x37C), 0x00EC);
675 	rtl818x_iowrite16(priv, REG_ADDR2(0x37E), 0x00EC);
676 	rtl818x_iowrite8(priv, REG_ADDR1(0x24E), 0x01);
677 	/* unknown, needed for suspend to RAM resume */
678 	rtl818x_iowrite8(priv, REG_ADDR1(0x0A), 0x72);
679 }
680 
681 static void rtl8187se_set_antenna_config(struct ieee80211_hw *dev, u8 def_ant,
682 					 bool diversity)
683 {
684 	struct rtl8180_priv *priv = dev->priv;
685 
686 	rtl8225_write_phy_cck(dev, 0x0C, 0x09);
687 	if (diversity) {
688 		if (def_ant == 1) {
689 			rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x00);
690 			rtl8225_write_phy_cck(dev, 0x11, 0xBB);
691 			rtl8225_write_phy_cck(dev, 0x01, 0xC7);
692 			rtl8225_write_phy_ofdm(dev, 0x0D, 0x54);
693 			rtl8225_write_phy_ofdm(dev, 0x18, 0xB2);
694 		} else { /* main antenna */
695 			rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x03);
696 			rtl8225_write_phy_cck(dev, 0x11, 0x9B);
697 			rtl8225_write_phy_cck(dev, 0x01, 0xC7);
698 			rtl8225_write_phy_ofdm(dev, 0x0D, 0x5C);
699 			rtl8225_write_phy_ofdm(dev, 0x18, 0xB2);
700 		}
701 	} else { /* disable antenna diversity */
702 		if (def_ant == 1) {
703 			rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x00);
704 			rtl8225_write_phy_cck(dev, 0x11, 0xBB);
705 			rtl8225_write_phy_cck(dev, 0x01, 0x47);
706 			rtl8225_write_phy_ofdm(dev, 0x0D, 0x54);
707 			rtl8225_write_phy_ofdm(dev, 0x18, 0x32);
708 		} else { /* main antenna */
709 			rtl818x_iowrite8(priv, &priv->map->TX_ANTENNA, 0x03);
710 			rtl8225_write_phy_cck(dev, 0x11, 0x9B);
711 			rtl8225_write_phy_cck(dev, 0x01, 0x47);
712 			rtl8225_write_phy_ofdm(dev, 0x0D, 0x5C);
713 			rtl8225_write_phy_ofdm(dev, 0x18, 0x32);
714 		}
715 	}
716 	/* priv->curr_ant = def_ant; */
717 }
718 
719 static void rtl8180_int_enable(struct ieee80211_hw *dev)
720 {
721 	struct rtl8180_priv *priv = dev->priv;
722 
723 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
724 		rtl818x_iowrite32(priv, &priv->map->IMR,
725 			  IMR_TBDER | IMR_TBDOK |
726 			  IMR_TVODER | IMR_TVODOK |
727 			  IMR_TVIDER | IMR_TVIDOK |
728 			  IMR_TBEDER | IMR_TBEDOK |
729 			  IMR_TBKDER | IMR_TBKDOK |
730 			  IMR_RDU | IMR_RER |
731 			  IMR_ROK | IMR_RQOSOK);
732 	} else {
733 		rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
734 	}
735 }
736 
737 static void rtl8180_int_disable(struct ieee80211_hw *dev)
738 {
739 	struct rtl8180_priv *priv = dev->priv;
740 
741 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
742 		rtl818x_iowrite32(priv, &priv->map->IMR, 0);
743 	} else {
744 		rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
745 	}
746 }
747 
748 static void rtl8180_conf_basic_rates(struct ieee80211_hw *dev,
749 			    u32 basic_mask)
750 {
751 	struct rtl8180_priv *priv = dev->priv;
752 	u16 reg;
753 	u32 resp_mask;
754 	u8 basic_max;
755 	u8 resp_max, resp_min;
756 
757 	resp_mask = basic_mask;
758 	/* IEEE80211 says the response rate should be equal to the highest basic
759 	 * rate that is not faster than received frame. But it says also that if
760 	 * the basic rate set does not contains any rate for the current
761 	 * modulation class then mandatory rate set must be used for that
762 	 * modulation class. Eventually add OFDM mandatory rates..
763 	 */
764 	if ((resp_mask & 0xf) == resp_mask)
765 		resp_mask |= 0x150; /* 6, 12, 24Mbps */
766 
767 	switch (priv->chip_family) {
768 
769 	case RTL818X_CHIP_FAMILY_RTL8180:
770 		/* in 8180 this is NOT a BITMAP */
771 		basic_max = fls(basic_mask) - 1;
772 		reg = rtl818x_ioread16(priv, &priv->map->BRSR);
773 		reg &= ~3;
774 		reg |= basic_max;
775 		rtl818x_iowrite16(priv, &priv->map->BRSR, reg);
776 		break;
777 
778 	case RTL818X_CHIP_FAMILY_RTL8185:
779 		resp_max = fls(resp_mask) - 1;
780 		resp_min = ffs(resp_mask) - 1;
781 		/* in 8185 this is a BITMAP */
782 		rtl818x_iowrite16(priv, &priv->map->BRSR, basic_mask);
783 		rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (resp_max << 4) |
784 				resp_min);
785 		break;
786 
787 	case RTL818X_CHIP_FAMILY_RTL8187SE:
788 		/* in 8187se this is a BITMAP. BRSR reg actually sets
789 		 * response rates.
790 		 */
791 		rtl818x_iowrite16(priv, &priv->map->BRSR_8187SE, resp_mask);
792 		break;
793 	}
794 }
795 
796 static void rtl8180_config_cardbus(struct ieee80211_hw *dev)
797 {
798 	struct rtl8180_priv *priv = dev->priv;
799 	u16 reg16;
800 	u8 reg8;
801 
802 	reg8 = rtl818x_ioread8(priv, &priv->map->CONFIG3);
803 	reg8 |= 1 << 1;
804 	rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg8);
805 
806 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
807 		rtl818x_iowrite16(priv, FEMR_SE, 0xffff);
808 	} else {
809 		reg16 = rtl818x_ioread16(priv, &priv->map->FEMR);
810 		reg16 |= (1 << 15) | (1 << 14) | (1 << 4);
811 		rtl818x_iowrite16(priv, &priv->map->FEMR, reg16);
812 	}
813 
814 }
815 
816 static int rtl8180_init_hw(struct ieee80211_hw *dev)
817 {
818 	struct rtl8180_priv *priv = dev->priv;
819 	u16 reg;
820 	u32 reg32;
821 
822 	rtl818x_iowrite8(priv, &priv->map->CMD, 0);
823 	rtl818x_ioread8(priv, &priv->map->CMD);
824 	msleep(10);
825 
826 	/* reset */
827 	rtl8180_int_disable(dev);
828 	rtl818x_ioread8(priv, &priv->map->CMD);
829 
830 	reg = rtl818x_ioread8(priv, &priv->map->CMD);
831 	reg &= (1 << 1);
832 	reg |= RTL818X_CMD_RESET;
833 	rtl818x_iowrite8(priv, &priv->map->CMD, RTL818X_CMD_RESET);
834 	rtl818x_ioread8(priv, &priv->map->CMD);
835 	msleep(200);
836 
837 	/* check success of reset */
838 	if (rtl818x_ioread8(priv, &priv->map->CMD) & RTL818X_CMD_RESET) {
839 		wiphy_err(dev->wiphy, "reset timeout!\n");
840 		return -ETIMEDOUT;
841 	}
842 
843 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
844 	rtl818x_ioread8(priv, &priv->map->CMD);
845 	msleep(200);
846 
847 	if (rtl818x_ioread8(priv, &priv->map->CONFIG3) & (1 << 3)) {
848 		rtl8180_config_cardbus(dev);
849 	}
850 
851 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
852 		rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_ENEDCA);
853 	else
854 		rtl818x_iowrite8(priv, &priv->map->MSR, 0);
855 
856 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
857 		rtl8180_set_anaparam(priv, priv->anaparam);
858 
859 	rtl818x_iowrite32(priv, &priv->map->RDSAR, priv->rx_ring_dma);
860 	/* mac80211 queue have higher prio for lower index. The last queue
861 	 * (that mac80211 is not aware of) is reserved for beacons (and have
862 	 * the highest priority on the NIC)
863 	 */
864 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8187SE) {
865 		rtl818x_iowrite32(priv, &priv->map->TBDA,
866 				  priv->tx_ring[1].dma);
867 		rtl818x_iowrite32(priv, &priv->map->TLPDA,
868 				  priv->tx_ring[0].dma);
869 	} else {
870 		rtl818x_iowrite32(priv, &priv->map->TBDA,
871 				  priv->tx_ring[4].dma);
872 		rtl818x_iowrite32(priv, &priv->map->TVODA,
873 				  priv->tx_ring[0].dma);
874 		rtl818x_iowrite32(priv, &priv->map->TVIDA,
875 				  priv->tx_ring[1].dma);
876 		rtl818x_iowrite32(priv, &priv->map->TBEDA,
877 				  priv->tx_ring[2].dma);
878 		rtl818x_iowrite32(priv, &priv->map->TBKDA,
879 				  priv->tx_ring[3].dma);
880 	}
881 
882 	/* TODO: necessary? specs indicate not */
883 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
884 	reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
885 	rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg & ~(1 << 3));
886 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
887 		reg = rtl818x_ioread8(priv, &priv->map->CONFIG2);
888 		rtl818x_iowrite8(priv, &priv->map->CONFIG2, reg | (1 << 4));
889 	}
890 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
891 
892 	/* TODO: set CONFIG5 for calibrating AGC on rtl8180 + philips radio? */
893 
894 	/* TODO: turn off hw wep on rtl8180 */
895 
896 	rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
897 
898 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
899 		rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
900 		rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0);
901 	} else {
902 		rtl818x_iowrite8(priv, &priv->map->SECURITY, 0);
903 
904 		rtl818x_iowrite8(priv, &priv->map->PHY_DELAY, 0x6);
905 		rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, 0x4C);
906 	}
907 
908 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
909 		/* TODO: set ClkRun enable? necessary? */
910 		reg = rtl818x_ioread8(priv, &priv->map->GP_ENABLE);
911 		rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, reg & ~(1 << 6));
912 		rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
913 		reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
914 		rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | (1 << 2));
915 		rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
916 		/* fix eccessive IFS after CTS-to-self */
917 		if (priv->map_pio) {
918 			u8 reg;
919 
920 			reg = rtl818x_ioread8(priv, &priv->map->PGSELECT);
921 			rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
922 			rtl818x_iowrite8(priv, REG_ADDR1(0xff), 0x35);
923 			rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
924 		} else
925 			rtl818x_iowrite8(priv, REG_ADDR1(0x1ff), 0x35);
926 	}
927 
928 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
929 
930 		/* the set auto rate fallback bitmask from 1M to 54 Mb/s */
931 		rtl818x_iowrite16(priv, ARFR, 0xFFF);
932 		rtl818x_ioread16(priv, ARFR);
933 
934 		/* stop unused queus (no dma alloc) */
935 		rtl818x_iowrite8(priv, &priv->map->TPPOLL_STOP,
936 			       RTL818x_TPPOLL_STOP_MG | RTL818x_TPPOLL_STOP_HI);
937 
938 		rtl818x_iowrite8(priv, &priv->map->ACM_CONTROL, 0x00);
939 		rtl818x_iowrite16(priv, &priv->map->TID_AC_MAP, 0xFA50);
940 
941 		rtl818x_iowrite16(priv, &priv->map->INT_MIG, 0);
942 
943 		/* some black magic here.. */
944 		rtl8187se_mac_config(dev);
945 
946 		rtl818x_iowrite16(priv, RFSW_CTRL, 0x569A);
947 		rtl818x_ioread16(priv, RFSW_CTRL);
948 
949 		rtl8180_set_anaparam(priv, RTL8225SE_ANAPARAM_ON);
950 		rtl8180_set_anaparam2(priv, RTL8225SE_ANAPARAM2_ON);
951 		rtl8180_set_anaparam3(priv, RTL8225SE_ANAPARAM3);
952 
953 
954 		rtl818x_iowrite8(priv, &priv->map->CONFIG5,
955 			    rtl818x_ioread8(priv, &priv->map->CONFIG5) & 0x7F);
956 
957 		/*probably this switch led on */
958 		rtl818x_iowrite8(priv, &priv->map->PGSELECT,
959 			    rtl818x_ioread8(priv, &priv->map->PGSELECT) | 0x08);
960 
961 		rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x0480);
962 		rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1BFF);
963 		rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x2488);
964 
965 		rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x4003);
966 
967 		/* the reference code mac hardcode table write
968 		 * this reg by doing byte-wide accesses.
969 		 * It does it just for lowest and highest byte..
970 		 */
971 		reg32 = rtl818x_ioread32(priv, &priv->map->RF_PARA);
972 		reg32 &= 0x00ffff00;
973 		reg32 |= 0xb8000054;
974 		rtl818x_iowrite32(priv, &priv->map->RF_PARA, reg32);
975 	} else
976 		/* stop unused queus (no dma alloc) */
977 		rtl818x_iowrite8(priv, &priv->map->TX_DMA_POLLING,
978 			    (1<<1) | (1<<2));
979 
980 	priv->rf->init(dev);
981 
982 	/* default basic rates are 1,2 Mbps for rtl8180. 1,2,6,9,12,18,24 Mbps
983 	 * otherwise. bitmask 0x3 and 0x01f3 respectively.
984 	 * NOTE: currenty rtl8225 RF code changes basic rates, so we need to do
985 	 * this after rf init.
986 	 * TODO: try to find out whether RF code really needs to do this..
987 	 */
988 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
989 		rtl8180_conf_basic_rates(dev, 0x3);
990 	else
991 		rtl8180_conf_basic_rates(dev, 0x1f3);
992 
993 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
994 		rtl8187se_set_antenna_config(dev,
995 					     priv->antenna_diversity_default,
996 					     priv->antenna_diversity_en);
997 	return 0;
998 }
999 
1000 static int rtl8180_init_rx_ring(struct ieee80211_hw *dev)
1001 {
1002 	struct rtl8180_priv *priv = dev->priv;
1003 	struct rtl818x_rx_cmd_desc *entry;
1004 	int i;
1005 
1006 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1007 		priv->rx_ring_sz = sizeof(struct rtl8187se_rx_desc);
1008 	else
1009 		priv->rx_ring_sz = sizeof(struct rtl8180_rx_desc);
1010 
1011 	priv->rx_ring = dma_alloc_coherent(&priv->pdev->dev,
1012 					   priv->rx_ring_sz * 32,
1013 					   &priv->rx_ring_dma, GFP_KERNEL);
1014 	if (!priv->rx_ring || (unsigned long)priv->rx_ring & 0xFF) {
1015 		wiphy_err(dev->wiphy, "Cannot allocate RX ring\n");
1016 		return -ENOMEM;
1017 	}
1018 
1019 	priv->rx_idx = 0;
1020 
1021 	for (i = 0; i < 32; i++) {
1022 		struct sk_buff *skb = dev_alloc_skb(MAX_RX_SIZE);
1023 		dma_addr_t *mapping;
1024 		entry = priv->rx_ring + priv->rx_ring_sz*i;
1025 		if (!skb) {
1026 			dma_free_coherent(&priv->pdev->dev,
1027 					  priv->rx_ring_sz * 32,
1028 					  priv->rx_ring, priv->rx_ring_dma);
1029 			wiphy_err(dev->wiphy, "Cannot allocate RX skb\n");
1030 			return -ENOMEM;
1031 		}
1032 		priv->rx_buf[i] = skb;
1033 		mapping = (dma_addr_t *)skb->cb;
1034 		*mapping = dma_map_single(&priv->pdev->dev,
1035 					  skb_tail_pointer(skb), MAX_RX_SIZE,
1036 					  DMA_FROM_DEVICE);
1037 
1038 		if (dma_mapping_error(&priv->pdev->dev, *mapping)) {
1039 			kfree_skb(skb);
1040 			dma_free_coherent(&priv->pdev->dev,
1041 					  priv->rx_ring_sz * 32,
1042 					  priv->rx_ring, priv->rx_ring_dma);
1043 			wiphy_err(dev->wiphy, "Cannot map DMA for RX skb\n");
1044 			return -ENOMEM;
1045 		}
1046 
1047 		entry->rx_buf = cpu_to_le32(*mapping);
1048 		entry->flags = cpu_to_le32(RTL818X_RX_DESC_FLAG_OWN |
1049 					   MAX_RX_SIZE);
1050 	}
1051 	entry->flags |= cpu_to_le32(RTL818X_RX_DESC_FLAG_EOR);
1052 	return 0;
1053 }
1054 
1055 static void rtl8180_free_rx_ring(struct ieee80211_hw *dev)
1056 {
1057 	struct rtl8180_priv *priv = dev->priv;
1058 	int i;
1059 
1060 	for (i = 0; i < 32; i++) {
1061 		struct sk_buff *skb = priv->rx_buf[i];
1062 		if (!skb)
1063 			continue;
1064 
1065 		dma_unmap_single(&priv->pdev->dev, *((dma_addr_t *)skb->cb),
1066 				 MAX_RX_SIZE, DMA_FROM_DEVICE);
1067 		kfree_skb(skb);
1068 	}
1069 
1070 	dma_free_coherent(&priv->pdev->dev, priv->rx_ring_sz * 32,
1071 			  priv->rx_ring, priv->rx_ring_dma);
1072 	priv->rx_ring = NULL;
1073 }
1074 
1075 static int rtl8180_init_tx_ring(struct ieee80211_hw *dev,
1076 				unsigned int prio, unsigned int entries)
1077 {
1078 	struct rtl8180_priv *priv = dev->priv;
1079 	struct rtl8180_tx_desc *ring;
1080 	dma_addr_t dma;
1081 	int i;
1082 
1083 	ring = dma_alloc_coherent(&priv->pdev->dev, sizeof(*ring) * entries,
1084 				  &dma, GFP_KERNEL);
1085 	if (!ring || (unsigned long)ring & 0xFF) {
1086 		wiphy_err(dev->wiphy, "Cannot allocate TX ring (prio = %d)\n",
1087 			  prio);
1088 		return -ENOMEM;
1089 	}
1090 
1091 	priv->tx_ring[prio].desc = ring;
1092 	priv->tx_ring[prio].dma = dma;
1093 	priv->tx_ring[prio].idx = 0;
1094 	priv->tx_ring[prio].entries = entries;
1095 	skb_queue_head_init(&priv->tx_ring[prio].queue);
1096 
1097 	for (i = 0; i < entries; i++)
1098 		ring[i].next_tx_desc =
1099 			cpu_to_le32((u32)dma + ((i + 1) % entries) * sizeof(*ring));
1100 
1101 	return 0;
1102 }
1103 
1104 static void rtl8180_free_tx_ring(struct ieee80211_hw *dev, unsigned int prio)
1105 {
1106 	struct rtl8180_priv *priv = dev->priv;
1107 	struct rtl8180_tx_ring *ring = &priv->tx_ring[prio];
1108 
1109 	while (skb_queue_len(&ring->queue)) {
1110 		struct rtl8180_tx_desc *entry = &ring->desc[ring->idx];
1111 		struct sk_buff *skb = __skb_dequeue(&ring->queue);
1112 
1113 		dma_unmap_single(&priv->pdev->dev, le32_to_cpu(entry->tx_buf),
1114 				 skb->len, DMA_TO_DEVICE);
1115 		kfree_skb(skb);
1116 		ring->idx = (ring->idx + 1) % ring->entries;
1117 	}
1118 
1119 	dma_free_coherent(&priv->pdev->dev,
1120 			  sizeof(*ring->desc) * ring->entries, ring->desc,
1121 			  ring->dma);
1122 	ring->desc = NULL;
1123 }
1124 
1125 static int rtl8180_start(struct ieee80211_hw *dev)
1126 {
1127 	struct rtl8180_priv *priv = dev->priv;
1128 	int ret, i;
1129 	u32 reg;
1130 
1131 	ret = rtl8180_init_rx_ring(dev);
1132 	if (ret)
1133 		return ret;
1134 
1135 	for (i = 0; i < (dev->queues + 1); i++)
1136 		if ((ret = rtl8180_init_tx_ring(dev, i, 16)))
1137 			goto err_free_rings;
1138 
1139 	ret = rtl8180_init_hw(dev);
1140 	if (ret)
1141 		goto err_free_rings;
1142 
1143 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
1144 		ret = request_irq(priv->pdev->irq, rtl8187se_interrupt,
1145 			  IRQF_SHARED, KBUILD_MODNAME, dev);
1146 	} else {
1147 		ret = request_irq(priv->pdev->irq, rtl8180_interrupt,
1148 			  IRQF_SHARED, KBUILD_MODNAME, dev);
1149 	}
1150 
1151 	if (ret) {
1152 		wiphy_err(dev->wiphy, "failed to register IRQ handler\n");
1153 		goto err_free_rings;
1154 	}
1155 
1156 	rtl8180_int_enable(dev);
1157 
1158 	/* in rtl8187se at MAR regs offset there is the management
1159 	 * TX descriptor DMA addres..
1160 	 */
1161 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8187SE) {
1162 		rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
1163 		rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
1164 	}
1165 
1166 	reg = RTL818X_RX_CONF_ONLYERLPKT |
1167 	      RTL818X_RX_CONF_RX_AUTORESETPHY |
1168 	      RTL818X_RX_CONF_MGMT |
1169 	      RTL818X_RX_CONF_DATA |
1170 	      (7 << 8 /* MAX RX DMA */) |
1171 	      RTL818X_RX_CONF_BROADCAST |
1172 	      RTL818X_RX_CONF_NICMAC;
1173 
1174 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185)
1175 		reg |= RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2;
1176 	else if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
1177 		reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE1)
1178 			? RTL818X_RX_CONF_CSDM1 : 0;
1179 		reg |= (priv->rfparam & RF_PARAM_CARRIERSENSE2)
1180 			? RTL818X_RX_CONF_CSDM2 : 0;
1181 	} else {
1182 		reg &= ~(RTL818X_RX_CONF_CSDM1 | RTL818X_RX_CONF_CSDM2);
1183 	}
1184 
1185 	priv->rx_conf = reg;
1186 	rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
1187 
1188 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
1189 		reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
1190 
1191 		/* CW is not on per-packet basis.
1192 		 * in rtl8185 the CW_VALUE reg is used.
1193 		 * in rtl8187se the AC param regs are used.
1194 		 */
1195 		reg &= ~RTL818X_CW_CONF_PERPACKET_CW;
1196 		/* retry limit IS on per-packet basis.
1197 		 * the short and long retry limit in TX_CONF
1198 		 * reg are ignored
1199 		 */
1200 		reg |= RTL818X_CW_CONF_PERPACKET_RETRY;
1201 		rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
1202 
1203 		reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
1204 		/* TX antenna and TX gain are not on per-packet basis.
1205 		 * TX Antenna is selected by ANTSEL reg (RX in BB regs).
1206 		 * TX gain is selected with CCK_TX_AGC and OFDM_TX_AGC regs
1207 		 */
1208 		reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN;
1209 		reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL;
1210 		reg |=  RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
1211 		rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
1212 
1213 		/* disable early TX */
1214 		rtl818x_iowrite8(priv, (u8 __iomem *)priv->map + 0xec, 0x3f);
1215 	}
1216 
1217 	reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
1218 	reg |= (6 << 21 /* MAX TX DMA */) |
1219 	       RTL818X_TX_CONF_NO_ICV;
1220 
1221 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1222 		reg |= 1<<30;  /*  "duration procedure mode" */
1223 
1224 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
1225 		reg &= ~RTL818X_TX_CONF_PROBE_DTS;
1226 	else
1227 		reg &= ~RTL818X_TX_CONF_HW_SEQNUM;
1228 
1229 	reg &= ~RTL818X_TX_CONF_DISCW;
1230 
1231 	/* different meaning, same value on both rtl8185 and rtl8180 */
1232 	reg &= ~RTL818X_TX_CONF_SAT_HWPLCP;
1233 
1234 	rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
1235 
1236 	reg = rtl818x_ioread8(priv, &priv->map->CMD);
1237 	reg |= RTL818X_CMD_RX_ENABLE;
1238 	reg |= RTL818X_CMD_TX_ENABLE;
1239 	rtl818x_iowrite8(priv, &priv->map->CMD, reg);
1240 
1241 	return 0;
1242 
1243  err_free_rings:
1244 	rtl8180_free_rx_ring(dev);
1245 	for (i = 0; i < (dev->queues + 1); i++)
1246 		if (priv->tx_ring[i].desc)
1247 			rtl8180_free_tx_ring(dev, i);
1248 
1249 	return ret;
1250 }
1251 
1252 static void rtl8180_stop(struct ieee80211_hw *dev)
1253 {
1254 	struct rtl8180_priv *priv = dev->priv;
1255 	u8 reg;
1256 	int i;
1257 
1258 	rtl8180_int_disable(dev);
1259 
1260 	reg = rtl818x_ioread8(priv, &priv->map->CMD);
1261 	reg &= ~RTL818X_CMD_TX_ENABLE;
1262 	reg &= ~RTL818X_CMD_RX_ENABLE;
1263 	rtl818x_iowrite8(priv, &priv->map->CMD, reg);
1264 
1265 	priv->rf->stop(dev);
1266 
1267 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
1268 	reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
1269 	rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
1270 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
1271 
1272 	free_irq(priv->pdev->irq, dev);
1273 
1274 	rtl8180_free_rx_ring(dev);
1275 	for (i = 0; i < (dev->queues + 1); i++)
1276 		rtl8180_free_tx_ring(dev, i);
1277 }
1278 
1279 static u64 rtl8180_get_tsf(struct ieee80211_hw *dev,
1280 			   struct ieee80211_vif *vif)
1281 {
1282 	struct rtl8180_priv *priv = dev->priv;
1283 
1284 	return rtl818x_ioread32(priv, &priv->map->TSFT[0]) |
1285 	       (u64)(rtl818x_ioread32(priv, &priv->map->TSFT[1])) << 32;
1286 }
1287 
1288 static void rtl8180_beacon_work(struct work_struct *work)
1289 {
1290 	struct rtl8180_vif *vif_priv =
1291 		container_of(work, struct rtl8180_vif, beacon_work.work);
1292 	struct ieee80211_vif *vif =
1293 		container_of((void *)vif_priv, struct ieee80211_vif, drv_priv);
1294 	struct ieee80211_hw *dev = vif_priv->dev;
1295 	struct ieee80211_mgmt *mgmt;
1296 	struct sk_buff *skb;
1297 
1298 	/* don't overflow the tx ring */
1299 	if (ieee80211_queue_stopped(dev, 0))
1300 		goto resched;
1301 
1302 	/* grab a fresh beacon */
1303 	skb = ieee80211_beacon_get(dev, vif);
1304 	if (!skb)
1305 		goto resched;
1306 
1307 	/*
1308 	 * update beacon timestamp w/ TSF value
1309 	 * TODO: make hardware update beacon timestamp
1310 	 */
1311 	mgmt = (struct ieee80211_mgmt *)skb->data;
1312 	mgmt->u.beacon.timestamp = cpu_to_le64(rtl8180_get_tsf(dev, vif));
1313 
1314 	/* TODO: use actual beacon queue */
1315 	skb_set_queue_mapping(skb, 0);
1316 
1317 	rtl8180_tx(dev, NULL, skb);
1318 
1319 resched:
1320 	/*
1321 	 * schedule next beacon
1322 	 * TODO: use hardware support for beacon timing
1323 	 */
1324 	schedule_delayed_work(&vif_priv->beacon_work,
1325 			usecs_to_jiffies(1024 * vif->bss_conf.beacon_int));
1326 }
1327 
1328 static int rtl8180_add_interface(struct ieee80211_hw *dev,
1329 				 struct ieee80211_vif *vif)
1330 {
1331 	struct rtl8180_priv *priv = dev->priv;
1332 	struct rtl8180_vif *vif_priv;
1333 
1334 	/*
1335 	 * We only support one active interface at a time.
1336 	 */
1337 	if (priv->vif)
1338 		return -EBUSY;
1339 
1340 	switch (vif->type) {
1341 	case NL80211_IFTYPE_STATION:
1342 	case NL80211_IFTYPE_ADHOC:
1343 		break;
1344 	default:
1345 		return -EOPNOTSUPP;
1346 	}
1347 
1348 	priv->vif = vif;
1349 
1350 	/* Initialize driver private area */
1351 	vif_priv = (struct rtl8180_vif *)&vif->drv_priv;
1352 	vif_priv->dev = dev;
1353 	INIT_DELAYED_WORK(&vif_priv->beacon_work, rtl8180_beacon_work);
1354 	vif_priv->enable_beacon = false;
1355 
1356 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
1357 	rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->MAC[0],
1358 			  le32_to_cpu(*(__le32 *)vif->addr));
1359 	rtl818x_iowrite16(priv, (__le16 __iomem *)&priv->map->MAC[4],
1360 			  le16_to_cpu(*(__le16 *)(vif->addr + 4)));
1361 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
1362 
1363 	return 0;
1364 }
1365 
1366 static void rtl8180_remove_interface(struct ieee80211_hw *dev,
1367 				     struct ieee80211_vif *vif)
1368 {
1369 	struct rtl8180_priv *priv = dev->priv;
1370 	priv->vif = NULL;
1371 }
1372 
1373 static int rtl8180_config(struct ieee80211_hw *dev, u32 changed)
1374 {
1375 	struct rtl8180_priv *priv = dev->priv;
1376 	struct ieee80211_conf *conf = &dev->conf;
1377 
1378 	priv->rf->set_chan(dev, conf);
1379 
1380 	return 0;
1381 }
1382 
1383 static void rtl8187se_conf_ac_parm(struct ieee80211_hw *dev, u8 queue)
1384 {
1385 	const struct ieee80211_tx_queue_params *params;
1386 	struct rtl8180_priv *priv = dev->priv;
1387 
1388 	/* hw value */
1389 	u32 ac_param;
1390 
1391 	u8 aifs;
1392 	u8 txop;
1393 	u8 cw_min, cw_max;
1394 
1395 	params = &priv->queue_param[queue];
1396 
1397 	cw_min = fls(params->cw_min);
1398 	cw_max = fls(params->cw_max);
1399 
1400 	aifs = 10 + params->aifs * priv->slot_time;
1401 
1402 	/* TODO: check if txop HW is in us (mult by 32) */
1403 	txop = params->txop;
1404 
1405 	ac_param = txop << AC_PARAM_TXOP_LIMIT_SHIFT |
1406 		cw_max << AC_PARAM_ECW_MAX_SHIFT |
1407 		cw_min << AC_PARAM_ECW_MIN_SHIFT |
1408 		aifs << AC_PARAM_AIFS_SHIFT;
1409 
1410 	switch (queue) {
1411 	case IEEE80211_AC_BK:
1412 		rtl818x_iowrite32(priv, &priv->map->AC_BK_PARAM, ac_param);
1413 		break;
1414 	case IEEE80211_AC_BE:
1415 		rtl818x_iowrite32(priv, &priv->map->AC_BE_PARAM, ac_param);
1416 		break;
1417 	case IEEE80211_AC_VI:
1418 		rtl818x_iowrite32(priv, &priv->map->AC_VI_PARAM, ac_param);
1419 		break;
1420 	case IEEE80211_AC_VO:
1421 		rtl818x_iowrite32(priv, &priv->map->AC_VO_PARAM, ac_param);
1422 		break;
1423 	}
1424 }
1425 
1426 static int rtl8180_conf_tx(struct ieee80211_hw *dev,
1427 			    struct ieee80211_vif *vif, u16 queue,
1428 			    const struct ieee80211_tx_queue_params *params)
1429 {
1430 	struct rtl8180_priv *priv = dev->priv;
1431 	u8 cw_min, cw_max;
1432 
1433 	/* nothing to do ? */
1434 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
1435 		return 0;
1436 
1437 	cw_min = fls(params->cw_min);
1438 	cw_max = fls(params->cw_max);
1439 
1440 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
1441 		priv->queue_param[queue] = *params;
1442 		rtl8187se_conf_ac_parm(dev, queue);
1443 	} else
1444 		rtl818x_iowrite8(priv, &priv->map->CW_VAL,
1445 				 (cw_max << 4) | cw_min);
1446 	return 0;
1447 }
1448 
1449 static void rtl8180_conf_erp(struct ieee80211_hw *dev,
1450 			    struct ieee80211_bss_conf *info)
1451 {
1452 	struct rtl8180_priv *priv = dev->priv;
1453 	u8 sifs, difs;
1454 	int eifs;
1455 	u8 hw_eifs;
1456 
1457 	/* TODO: should we do something ? */
1458 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180)
1459 		return;
1460 
1461 	/* I _hope_ this means 10uS for the HW.
1462 	 * In reference code it is 0x22 for
1463 	 * both rtl8187L and rtl8187SE
1464 	 */
1465 	sifs = 0x22;
1466 
1467 	if (info->use_short_slot)
1468 		priv->slot_time = 9;
1469 	else
1470 		priv->slot_time = 20;
1471 
1472 	/* 10 is SIFS time in uS */
1473 	difs = 10 + 2 * priv->slot_time;
1474 	eifs = 10 + difs + priv->ack_time;
1475 
1476 	/* HW should use 4uS units for EIFS (I'm sure for rtl8185)*/
1477 	hw_eifs = DIV_ROUND_UP(eifs, 4);
1478 
1479 
1480 	rtl818x_iowrite8(priv, &priv->map->SLOT, priv->slot_time);
1481 	rtl818x_iowrite8(priv, &priv->map->SIFS, sifs);
1482 	rtl818x_iowrite8(priv, &priv->map->DIFS, difs);
1483 
1484 	/* from reference code. set ack timeout reg = eifs reg */
1485 	rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER, hw_eifs);
1486 
1487 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1488 		rtl818x_iowrite8(priv, &priv->map->EIFS_8187SE, hw_eifs);
1489 	else if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8185) {
1490 		/* rtl8187/rtl8185 HW bug. After EIFS is elapsed,
1491 		 * the HW still wait for DIFS.
1492 		 * HW uses 4uS units for EIFS.
1493 		 */
1494 		hw_eifs = DIV_ROUND_UP(eifs - difs, 4);
1495 
1496 		rtl818x_iowrite8(priv, &priv->map->EIFS, hw_eifs);
1497 	}
1498 }
1499 
1500 static void rtl8180_bss_info_changed(struct ieee80211_hw *dev,
1501 				     struct ieee80211_vif *vif,
1502 				     struct ieee80211_bss_conf *info,
1503 				     u32 changed)
1504 {
1505 	struct rtl8180_priv *priv = dev->priv;
1506 	struct rtl8180_vif *vif_priv;
1507 	int i;
1508 	u8 reg;
1509 
1510 	vif_priv = (struct rtl8180_vif *)&vif->drv_priv;
1511 
1512 	if (changed & BSS_CHANGED_BSSID) {
1513 		rtl818x_iowrite16(priv, (__le16 __iomem *)&priv->map->BSSID[0],
1514 				  le16_to_cpu(*(__le16 *)info->bssid));
1515 		rtl818x_iowrite32(priv, (__le32 __iomem *)&priv->map->BSSID[2],
1516 				  le32_to_cpu(*(__le32 *)(info->bssid + 2)));
1517 
1518 		if (is_valid_ether_addr(info->bssid)) {
1519 			if (vif->type == NL80211_IFTYPE_ADHOC)
1520 				reg = RTL818X_MSR_ADHOC;
1521 			else
1522 				reg = RTL818X_MSR_INFRA;
1523 		} else
1524 			reg = RTL818X_MSR_NO_LINK;
1525 
1526 		if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1527 			reg |= RTL818X_MSR_ENEDCA;
1528 
1529 		rtl818x_iowrite8(priv, &priv->map->MSR, reg);
1530 	}
1531 
1532 	if (changed & BSS_CHANGED_BASIC_RATES)
1533 		rtl8180_conf_basic_rates(dev, info->basic_rates);
1534 
1535 	if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_ERP_PREAMBLE)) {
1536 
1537 		/* when preamble changes, acktime duration changes, and erp must
1538 		 * be recalculated. ACK time is calculated at lowest rate.
1539 		 * Since mac80211 include SIFS time we remove it (-10)
1540 		 */
1541 		priv->ack_time =
1542 			le16_to_cpu(ieee80211_generic_frame_duration(dev,
1543 					priv->vif,
1544 					NL80211_BAND_2GHZ, 10,
1545 					&priv->rates[0])) - 10;
1546 
1547 		rtl8180_conf_erp(dev, info);
1548 
1549 		/* mac80211 supplies aifs_n to driver and calls
1550 		 * conf_tx callback whether aifs_n changes, NOT
1551 		 * when aifs changes.
1552 		 * Aifs should be recalculated if slot changes.
1553 		 */
1554 		if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
1555 			for (i = 0; i < 4; i++)
1556 				rtl8187se_conf_ac_parm(dev, i);
1557 		}
1558 	}
1559 
1560 	if (changed & BSS_CHANGED_BEACON_ENABLED)
1561 		vif_priv->enable_beacon = info->enable_beacon;
1562 
1563 	if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON)) {
1564 		cancel_delayed_work_sync(&vif_priv->beacon_work);
1565 		if (vif_priv->enable_beacon)
1566 			schedule_work(&vif_priv->beacon_work.work);
1567 	}
1568 }
1569 
1570 static u64 rtl8180_prepare_multicast(struct ieee80211_hw *dev,
1571 				     struct netdev_hw_addr_list *mc_list)
1572 {
1573 	return netdev_hw_addr_list_count(mc_list);
1574 }
1575 
1576 static void rtl8180_configure_filter(struct ieee80211_hw *dev,
1577 				     unsigned int changed_flags,
1578 				     unsigned int *total_flags,
1579 				     u64 multicast)
1580 {
1581 	struct rtl8180_priv *priv = dev->priv;
1582 
1583 	if (changed_flags & FIF_FCSFAIL)
1584 		priv->rx_conf ^= RTL818X_RX_CONF_FCS;
1585 	if (changed_flags & FIF_CONTROL)
1586 		priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
1587 	if (changed_flags & FIF_OTHER_BSS)
1588 		priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
1589 	if (*total_flags & FIF_ALLMULTI || multicast > 0)
1590 		priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
1591 	else
1592 		priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
1593 
1594 	*total_flags = 0;
1595 
1596 	if (priv->rx_conf & RTL818X_RX_CONF_FCS)
1597 		*total_flags |= FIF_FCSFAIL;
1598 	if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
1599 		*total_flags |= FIF_CONTROL;
1600 	if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
1601 		*total_flags |= FIF_OTHER_BSS;
1602 	if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
1603 		*total_flags |= FIF_ALLMULTI;
1604 
1605 	rtl818x_iowrite32(priv, &priv->map->RX_CONF, priv->rx_conf);
1606 }
1607 
1608 static const struct ieee80211_ops rtl8180_ops = {
1609 	.tx			= rtl8180_tx,
1610 	.start			= rtl8180_start,
1611 	.stop			= rtl8180_stop,
1612 	.add_interface		= rtl8180_add_interface,
1613 	.remove_interface	= rtl8180_remove_interface,
1614 	.config			= rtl8180_config,
1615 	.bss_info_changed	= rtl8180_bss_info_changed,
1616 	.conf_tx		= rtl8180_conf_tx,
1617 	.prepare_multicast	= rtl8180_prepare_multicast,
1618 	.configure_filter	= rtl8180_configure_filter,
1619 	.get_tsf		= rtl8180_get_tsf,
1620 };
1621 
1622 static void rtl8180_eeprom_register_read(struct eeprom_93cx6 *eeprom)
1623 {
1624 	struct rtl8180_priv *priv = eeprom->data;
1625 	u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
1626 
1627 	eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
1628 	eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
1629 	eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
1630 	eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
1631 }
1632 
1633 static void rtl8180_eeprom_register_write(struct eeprom_93cx6 *eeprom)
1634 {
1635 	struct rtl8180_priv *priv = eeprom->data;
1636 	u8 reg = 2 << 6;
1637 
1638 	if (eeprom->reg_data_in)
1639 		reg |= RTL818X_EEPROM_CMD_WRITE;
1640 	if (eeprom->reg_data_out)
1641 		reg |= RTL818X_EEPROM_CMD_READ;
1642 	if (eeprom->reg_data_clock)
1643 		reg |= RTL818X_EEPROM_CMD_CK;
1644 	if (eeprom->reg_chip_select)
1645 		reg |= RTL818X_EEPROM_CMD_CS;
1646 
1647 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
1648 	rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
1649 	udelay(10);
1650 }
1651 
1652 static void rtl8180_eeprom_read(struct rtl8180_priv *priv)
1653 {
1654 	struct eeprom_93cx6 eeprom;
1655 	int eeprom_cck_table_adr;
1656 	u16 eeprom_val;
1657 	int i;
1658 
1659 	eeprom.data = priv;
1660 	eeprom.register_read = rtl8180_eeprom_register_read;
1661 	eeprom.register_write = rtl8180_eeprom_register_write;
1662 	if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
1663 		eeprom.width = PCI_EEPROM_WIDTH_93C66;
1664 	else
1665 		eeprom.width = PCI_EEPROM_WIDTH_93C46;
1666 
1667 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
1668 			RTL818X_EEPROM_CMD_PROGRAM);
1669 	rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
1670 	udelay(10);
1671 
1672 	eeprom_93cx6_read(&eeprom, 0x06, &eeprom_val);
1673 	eeprom_val &= 0xFF;
1674 	priv->rf_type = eeprom_val;
1675 
1676 	eeprom_93cx6_read(&eeprom, 0x17, &eeprom_val);
1677 	priv->csthreshold = eeprom_val >> 8;
1678 
1679 	eeprom_93cx6_multiread(&eeprom, 0x7, (__le16 *)priv->mac_addr, 3);
1680 
1681 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1682 		eeprom_cck_table_adr = 0x30;
1683 	else
1684 		eeprom_cck_table_adr = 0x10;
1685 
1686 	/* CCK TX power */
1687 	for (i = 0; i < 14; i += 2) {
1688 		u16 txpwr;
1689 		eeprom_93cx6_read(&eeprom, eeprom_cck_table_adr + (i >> 1),
1690 				&txpwr);
1691 		priv->channels[i].hw_value = txpwr & 0xFF;
1692 		priv->channels[i + 1].hw_value = txpwr >> 8;
1693 	}
1694 
1695 	/* OFDM TX power */
1696 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
1697 		for (i = 0; i < 14; i += 2) {
1698 			u16 txpwr;
1699 			eeprom_93cx6_read(&eeprom, 0x20 + (i >> 1), &txpwr);
1700 			priv->channels[i].hw_value |= (txpwr & 0xFF) << 8;
1701 			priv->channels[i + 1].hw_value |= txpwr & 0xFF00;
1702 		}
1703 	}
1704 
1705 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8180) {
1706 		__le32 anaparam;
1707 		eeprom_93cx6_multiread(&eeprom, 0xD, (__le16 *)&anaparam, 2);
1708 		priv->anaparam = le32_to_cpu(anaparam);
1709 		eeprom_93cx6_read(&eeprom, 0x19, &priv->rfparam);
1710 	}
1711 
1712 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE) {
1713 		eeprom_93cx6_read(&eeprom, 0x3F, &eeprom_val);
1714 		priv->antenna_diversity_en = !!(eeprom_val & 0x100);
1715 		priv->antenna_diversity_default = (eeprom_val & 0xC00) == 0x400;
1716 
1717 		eeprom_93cx6_read(&eeprom, 0x7C, &eeprom_val);
1718 		priv->xtal_out = eeprom_val & 0xF;
1719 		priv->xtal_in = (eeprom_val & 0xF0) >> 4;
1720 		priv->xtal_cal = !!(eeprom_val & 0x1000);
1721 		priv->thermal_meter_val = (eeprom_val & 0xF00) >> 8;
1722 		priv->thermal_meter_en = !!(eeprom_val & 0x2000);
1723 	}
1724 
1725 	rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
1726 			RTL818X_EEPROM_CMD_NORMAL);
1727 }
1728 
1729 static int rtl8180_probe(struct pci_dev *pdev,
1730 				   const struct pci_device_id *id)
1731 {
1732 	struct ieee80211_hw *dev;
1733 	struct rtl8180_priv *priv;
1734 	unsigned long mem_len;
1735 	unsigned int io_len;
1736 	int err;
1737 	const char *chip_name, *rf_name = NULL;
1738 	u32 reg;
1739 
1740 	err = pci_enable_device(pdev);
1741 	if (err) {
1742 		printk(KERN_ERR "%s (rtl8180): Cannot enable new PCI device\n",
1743 		       pci_name(pdev));
1744 		return err;
1745 	}
1746 
1747 	err = pci_request_regions(pdev, KBUILD_MODNAME);
1748 	if (err) {
1749 		printk(KERN_ERR "%s (rtl8180): Cannot obtain PCI resources\n",
1750 		       pci_name(pdev));
1751 		goto err_disable_dev;
1752 	}
1753 
1754 	io_len = pci_resource_len(pdev, 0);
1755 	mem_len = pci_resource_len(pdev, 1);
1756 
1757 	if (mem_len < sizeof(struct rtl818x_csr) ||
1758 	    io_len < sizeof(struct rtl818x_csr)) {
1759 		printk(KERN_ERR "%s (rtl8180): Too short PCI resources\n",
1760 		       pci_name(pdev));
1761 		err = -ENOMEM;
1762 		goto err_free_reg;
1763 	}
1764 
1765 	if ((err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) ||
1766 	    (err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)))) {
1767 		printk(KERN_ERR "%s (rtl8180): No suitable DMA available\n",
1768 		       pci_name(pdev));
1769 		goto err_free_reg;
1770 	}
1771 
1772 	pci_set_master(pdev);
1773 
1774 	dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8180_ops);
1775 	if (!dev) {
1776 		printk(KERN_ERR "%s (rtl8180): ieee80211 alloc failed\n",
1777 		       pci_name(pdev));
1778 		err = -ENOMEM;
1779 		goto err_free_reg;
1780 	}
1781 
1782 	priv = dev->priv;
1783 	priv->pdev = pdev;
1784 
1785 	dev->max_rates = 1;
1786 	SET_IEEE80211_DEV(dev, &pdev->dev);
1787 	pci_set_drvdata(pdev, dev);
1788 
1789 	priv->map_pio = false;
1790 	priv->map = pci_iomap(pdev, 1, mem_len);
1791 	if (!priv->map) {
1792 		priv->map = pci_iomap(pdev, 0, io_len);
1793 		priv->map_pio = true;
1794 	}
1795 
1796 	if (!priv->map) {
1797 		dev_err(&pdev->dev, "Cannot map device memory/PIO\n");
1798 		err = -ENOMEM;
1799 		goto err_free_dev;
1800 	}
1801 
1802 	BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
1803 	BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));
1804 
1805 	memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
1806 	memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
1807 
1808 	priv->band.band = NL80211_BAND_2GHZ;
1809 	priv->band.channels = priv->channels;
1810 	priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
1811 	priv->band.bitrates = priv->rates;
1812 	priv->band.n_bitrates = 4;
1813 	dev->wiphy->bands[NL80211_BAND_2GHZ] = &priv->band;
1814 
1815 	ieee80211_hw_set(dev, HOST_BROADCAST_PS_BUFFERING);
1816 	ieee80211_hw_set(dev, RX_INCLUDES_FCS);
1817 
1818 	dev->vif_data_size = sizeof(struct rtl8180_vif);
1819 	dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1820 					BIT(NL80211_IFTYPE_ADHOC);
1821 	dev->max_signal = 65;
1822 
1823 	reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
1824 	reg &= RTL818X_TX_CONF_HWVER_MASK;
1825 	switch (reg) {
1826 	case RTL818X_TX_CONF_R8180_ABCD:
1827 		chip_name = "RTL8180";
1828 		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8180;
1829 		break;
1830 
1831 	case RTL818X_TX_CONF_R8180_F:
1832 		chip_name = "RTL8180vF";
1833 		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8180;
1834 		break;
1835 
1836 	case RTL818X_TX_CONF_R8185_ABC:
1837 		chip_name = "RTL8185";
1838 		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8185;
1839 		break;
1840 
1841 	case RTL818X_TX_CONF_R8185_D:
1842 		chip_name = "RTL8185vD";
1843 		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8185;
1844 		break;
1845 
1846 	case RTL818X_TX_CONF_RTL8187SE:
1847 		chip_name = "RTL8187SE";
1848 		if (priv->map_pio) {
1849 			dev_err(&pdev->dev,
1850 				"MMIO failed. PIO not supported on RTL8187SE\n");
1851 			err = -ENOMEM;
1852 			goto err_iounmap;
1853 		}
1854 		priv->chip_family = RTL818X_CHIP_FAMILY_RTL8187SE;
1855 		break;
1856 
1857 	default:
1858 		printk(KERN_ERR "%s (rtl8180): Unknown chip! (0x%x)\n",
1859 		       pci_name(pdev), reg >> 25);
1860 		err = -ENODEV;
1861 		goto err_iounmap;
1862 	}
1863 
1864 	/* we declare to MAC80211 all the queues except for beacon queue
1865 	 * that will be eventually handled by DRV.
1866 	 * TX rings are arranged in such a way that lower is the IDX,
1867 	 * higher is the priority, in order to achieve direct mapping
1868 	 * with mac80211, however the beacon queue is an exception and it
1869 	 * is mapped on the highst tx ring IDX.
1870 	 */
1871 	if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1872 		dev->queues = RTL8187SE_NR_TX_QUEUES - 1;
1873 	else
1874 		dev->queues = RTL8180_NR_TX_QUEUES - 1;
1875 
1876 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180) {
1877 		priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
1878 		pci_try_set_mwi(pdev);
1879 	}
1880 
1881 	if (priv->chip_family != RTL818X_CHIP_FAMILY_RTL8180)
1882 		ieee80211_hw_set(dev, SIGNAL_DBM);
1883 	else
1884 		ieee80211_hw_set(dev, SIGNAL_UNSPEC);
1885 
1886 	wiphy_ext_feature_set(dev->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1887 
1888 	rtl8180_eeprom_read(priv);
1889 
1890 	switch (priv->rf_type) {
1891 	case 1:	rf_name = "Intersil";
1892 		break;
1893 	case 2:	rf_name = "RFMD";
1894 		break;
1895 	case 3:	priv->rf = &sa2400_rf_ops;
1896 		break;
1897 	case 4:	priv->rf = &max2820_rf_ops;
1898 		break;
1899 	case 5:	priv->rf = &grf5101_rf_ops;
1900 		break;
1901 	case 9:
1902 		if (priv->chip_family == RTL818X_CHIP_FAMILY_RTL8187SE)
1903 			priv->rf = rtl8187se_detect_rf(dev);
1904 		else
1905 			priv->rf = rtl8180_detect_rf(dev);
1906 		break;
1907 	case 10:
1908 		rf_name = "RTL8255";
1909 		break;
1910 	default:
1911 		printk(KERN_ERR "%s (rtl8180): Unknown RF! (0x%x)\n",
1912 		       pci_name(pdev), priv->rf_type);
1913 		err = -ENODEV;
1914 		goto err_iounmap;
1915 	}
1916 
1917 	if (!priv->rf) {
1918 		printk(KERN_ERR "%s (rtl8180): %s RF frontend not supported!\n",
1919 		       pci_name(pdev), rf_name);
1920 		err = -ENODEV;
1921 		goto err_iounmap;
1922 	}
1923 
1924 	if (!is_valid_ether_addr(priv->mac_addr)) {
1925 		printk(KERN_WARNING "%s (rtl8180): Invalid hwaddr! Using"
1926 		       " randomly generated MAC addr\n", pci_name(pdev));
1927 		eth_random_addr(priv->mac_addr);
1928 	}
1929 	SET_IEEE80211_PERM_ADDR(dev, priv->mac_addr);
1930 
1931 	spin_lock_init(&priv->lock);
1932 
1933 	err = ieee80211_register_hw(dev);
1934 	if (err) {
1935 		printk(KERN_ERR "%s (rtl8180): Cannot register device\n",
1936 		       pci_name(pdev));
1937 		goto err_iounmap;
1938 	}
1939 
1940 	wiphy_info(dev->wiphy, "hwaddr %pm, %s + %s\n",
1941 		   priv->mac_addr, chip_name, priv->rf->name);
1942 
1943 	return 0;
1944 
1945  err_iounmap:
1946 	pci_iounmap(pdev, priv->map);
1947 
1948  err_free_dev:
1949 	ieee80211_free_hw(dev);
1950 
1951  err_free_reg:
1952 	pci_release_regions(pdev);
1953 
1954  err_disable_dev:
1955 	pci_disable_device(pdev);
1956 	return err;
1957 }
1958 
1959 static void rtl8180_remove(struct pci_dev *pdev)
1960 {
1961 	struct ieee80211_hw *dev = pci_get_drvdata(pdev);
1962 	struct rtl8180_priv *priv;
1963 
1964 	if (!dev)
1965 		return;
1966 
1967 	ieee80211_unregister_hw(dev);
1968 
1969 	priv = dev->priv;
1970 
1971 	pci_iounmap(pdev, priv->map);
1972 	pci_release_regions(pdev);
1973 	pci_disable_device(pdev);
1974 	ieee80211_free_hw(dev);
1975 }
1976 
1977 #define rtl8180_suspend NULL
1978 #define rtl8180_resume NULL
1979 
1980 static SIMPLE_DEV_PM_OPS(rtl8180_pm_ops, rtl8180_suspend, rtl8180_resume);
1981 
1982 static struct pci_driver rtl8180_driver = {
1983 	.name		= KBUILD_MODNAME,
1984 	.id_table	= rtl8180_table,
1985 	.probe		= rtl8180_probe,
1986 	.remove		= rtl8180_remove,
1987 	.driver.pm	= &rtl8180_pm_ops,
1988 };
1989 
1990 module_pci_driver(rtl8180_driver);
1991