rt2x00: Don't use pskb_expand_head()
[linux-2.6] / drivers / net / wireless / rtl8187_dev.c
1 /*
2  * Linux device driver for RTL8187
3  *
4  * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
5  * Copyright 2007 Andrea Merello <andreamrl@tiscali.it>
6  *
7  * Based on the r8187 driver, which is:
8  * Copyright 2005 Andrea Merello <andreamrl@tiscali.it>, et al.
9  *
10  * Magic delays and register offsets below are taken from the original
11  * r8187 driver sources.  Thanks to Realtek for their support!
12  *
13  * This program is free software; you can redistribute it and/or modify
14  * it under the terms of the GNU General Public License version 2 as
15  * published by the Free Software Foundation.
16  */
17
18 #include <linux/init.h>
19 #include <linux/usb.h>
20 #include <linux/delay.h>
21 #include <linux/etherdevice.h>
22 #include <linux/eeprom_93cx6.h>
23 #include <net/mac80211.h>
24
25 #include "rtl8187.h"
26 #include "rtl8187_rtl8225.h"
27
28 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
29 MODULE_AUTHOR("Andrea Merello <andreamrl@tiscali.it>");
30 MODULE_DESCRIPTION("RTL8187 USB wireless driver");
31 MODULE_LICENSE("GPL");
32
33 static struct usb_device_id rtl8187_table[] __devinitdata = {
34         /* Realtek */
35         {USB_DEVICE(0x0bda, 0x8187)},
36         /* Netgear */
37         {USB_DEVICE(0x0846, 0x6100)},
38         {USB_DEVICE(0x0846, 0x6a00)},
39         /* HP */
40         {USB_DEVICE(0x03f0, 0xca02)},
41         /* Sitecom */
42         {USB_DEVICE(0x0df6, 0x000d)},
43         {}
44 };
45
46 MODULE_DEVICE_TABLE(usb, rtl8187_table);
47
48 static const struct ieee80211_rate rtl818x_rates[] = {
49         { .bitrate = 10, .hw_value = 0, },
50         { .bitrate = 20, .hw_value = 1, },
51         { .bitrate = 55, .hw_value = 2, },
52         { .bitrate = 110, .hw_value = 3, },
53         { .bitrate = 60, .hw_value = 4, },
54         { .bitrate = 90, .hw_value = 5, },
55         { .bitrate = 120, .hw_value = 6, },
56         { .bitrate = 180, .hw_value = 7, },
57         { .bitrate = 240, .hw_value = 8, },
58         { .bitrate = 360, .hw_value = 9, },
59         { .bitrate = 480, .hw_value = 10, },
60         { .bitrate = 540, .hw_value = 11, },
61 };
62
63 static const struct ieee80211_channel rtl818x_channels[] = {
64         { .center_freq = 2412 },
65         { .center_freq = 2417 },
66         { .center_freq = 2422 },
67         { .center_freq = 2427 },
68         { .center_freq = 2432 },
69         { .center_freq = 2437 },
70         { .center_freq = 2442 },
71         { .center_freq = 2447 },
72         { .center_freq = 2452 },
73         { .center_freq = 2457 },
74         { .center_freq = 2462 },
75         { .center_freq = 2467 },
76         { .center_freq = 2472 },
77         { .center_freq = 2484 },
78 };
79
80 static void rtl8187_iowrite_async_cb(struct urb *urb)
81 {
82         kfree(urb->context);
83         usb_free_urb(urb);
84 }
85
86 static void rtl8187_iowrite_async(struct rtl8187_priv *priv, __le16 addr,
87                                   void *data, u16 len)
88 {
89         struct usb_ctrlrequest *dr;
90         struct urb *urb;
91         struct rtl8187_async_write_data {
92                 u8 data[4];
93                 struct usb_ctrlrequest dr;
94         } *buf;
95
96         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
97         if (!buf)
98                 return;
99
100         urb = usb_alloc_urb(0, GFP_ATOMIC);
101         if (!urb) {
102                 kfree(buf);
103                 return;
104         }
105
106         dr = &buf->dr;
107
108         dr->bRequestType = RTL8187_REQT_WRITE;
109         dr->bRequest = RTL8187_REQ_SET_REG;
110         dr->wValue = addr;
111         dr->wIndex = 0;
112         dr->wLength = cpu_to_le16(len);
113
114         memcpy(buf, data, len);
115
116         usb_fill_control_urb(urb, priv->udev, usb_sndctrlpipe(priv->udev, 0),
117                              (unsigned char *)dr, buf, len,
118                              rtl8187_iowrite_async_cb, buf);
119         usb_submit_urb(urb, GFP_ATOMIC);
120 }
121
122 static inline void rtl818x_iowrite32_async(struct rtl8187_priv *priv,
123                                            __le32 *addr, u32 val)
124 {
125         __le32 buf = cpu_to_le32(val);
126
127         rtl8187_iowrite_async(priv, cpu_to_le16((unsigned long)addr),
128                               &buf, sizeof(buf));
129 }
130
131 void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
132 {
133         struct rtl8187_priv *priv = dev->priv;
134
135         data <<= 8;
136         data |= addr | 0x80;
137
138         rtl818x_iowrite8(priv, &priv->map->PHY[3], (data >> 24) & 0xFF);
139         rtl818x_iowrite8(priv, &priv->map->PHY[2], (data >> 16) & 0xFF);
140         rtl818x_iowrite8(priv, &priv->map->PHY[1], (data >> 8) & 0xFF);
141         rtl818x_iowrite8(priv, &priv->map->PHY[0], data & 0xFF);
142
143         msleep(1);
144 }
145
146 static void rtl8187_tx_cb(struct urb *urb)
147 {
148         struct ieee80211_tx_status status;
149         struct sk_buff *skb = (struct sk_buff *)urb->context;
150         struct rtl8187_tx_info *info = (struct rtl8187_tx_info *)skb->cb;
151
152         memset(&status, 0, sizeof(status));
153
154         usb_free_urb(info->urb);
155         if (info->control)
156                 memcpy(&status.control, info->control, sizeof(status.control));
157         kfree(info->control);
158         skb_pull(skb, sizeof(struct rtl8187_tx_hdr));
159         status.flags |= IEEE80211_TX_STATUS_ACK;
160         ieee80211_tx_status_irqsafe(info->dev, skb, &status);
161 }
162
163 static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
164                       struct ieee80211_tx_control *control)
165 {
166         struct rtl8187_priv *priv = dev->priv;
167         struct rtl8187_tx_hdr *hdr;
168         struct rtl8187_tx_info *info;
169         struct urb *urb;
170         __le16 rts_dur = 0;
171         u32 flags;
172
173         urb = usb_alloc_urb(0, GFP_ATOMIC);
174         if (!urb) {
175                 kfree_skb(skb);
176                 return 0;
177         }
178
179         flags = skb->len;
180         flags |= RTL8187_TX_FLAG_NO_ENCRYPT;
181
182         BUG_ON(!control->tx_rate);
183
184         flags |= control->tx_rate->hw_value << 24;
185         if (ieee80211_get_morefrag((struct ieee80211_hdr *)skb->data))
186                 flags |= RTL8187_TX_FLAG_MORE_FRAG;
187         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
188                 BUG_ON(!control->rts_cts_rate);
189                 flags |= RTL8187_TX_FLAG_RTS;
190                 flags |= control->rts_cts_rate->hw_value << 19;
191                 rts_dur = ieee80211_rts_duration(dev, priv->vif,
192                                                  skb->len, control);
193         } else if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT) {
194                 BUG_ON(!control->rts_cts_rate);
195                 flags |= RTL8187_TX_FLAG_CTS;
196                 flags |= control->rts_cts_rate->hw_value << 19;
197         }
198
199         hdr = (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
200         hdr->flags = cpu_to_le32(flags);
201         hdr->len = 0;
202         hdr->rts_duration = rts_dur;
203         hdr->retry = cpu_to_le32(control->retry_limit << 8);
204
205         info = (struct rtl8187_tx_info *)skb->cb;
206         info->control = kmemdup(control, sizeof(*control), GFP_ATOMIC);
207         info->urb = urb;
208         info->dev = dev;
209         usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, 2),
210                           hdr, skb->len, rtl8187_tx_cb, skb);
211         usb_submit_urb(urb, GFP_ATOMIC);
212
213         return 0;
214 }
215
216 static void rtl8187_rx_cb(struct urb *urb)
217 {
218         struct sk_buff *skb = (struct sk_buff *)urb->context;
219         struct rtl8187_rx_info *info = (struct rtl8187_rx_info *)skb->cb;
220         struct ieee80211_hw *dev = info->dev;
221         struct rtl8187_priv *priv = dev->priv;
222         struct rtl8187_rx_hdr *hdr;
223         struct ieee80211_rx_status rx_status = { 0 };
224         int rate, signal;
225         u32 flags;
226
227         spin_lock(&priv->rx_queue.lock);
228         if (skb->next)
229                 __skb_unlink(skb, &priv->rx_queue);
230         else {
231                 spin_unlock(&priv->rx_queue.lock);
232                 return;
233         }
234         spin_unlock(&priv->rx_queue.lock);
235
236         if (unlikely(urb->status)) {
237                 usb_free_urb(urb);
238                 dev_kfree_skb_irq(skb);
239                 return;
240         }
241
242         skb_put(skb, urb->actual_length);
243         hdr = (struct rtl8187_rx_hdr *)(skb_tail_pointer(skb) - sizeof(*hdr));
244         flags = le32_to_cpu(hdr->flags);
245         skb_trim(skb, flags & 0x0FFF);
246
247         signal = hdr->agc >> 1;
248         rate = (flags >> 20) & 0xF;
249         if (rate > 3) { /* OFDM rate */
250                 if (signal > 90)
251                         signal = 90;
252                 else if (signal < 25)
253                         signal = 25;
254                 signal = 90 - signal;
255         } else {        /* CCK rate */
256                 if (signal > 95)
257                         signal = 95;
258                 else if (signal < 30)
259                         signal = 30;
260                 signal = 95 - signal;
261         }
262
263         rx_status.antenna = (hdr->signal >> 7) & 1;
264         rx_status.signal = 64 - min(hdr->noise, (u8)64);
265         rx_status.ssi = signal;
266         rx_status.rate_idx = rate;
267         rx_status.freq = dev->conf.channel->center_freq;
268         rx_status.band = dev->conf.channel->band;
269         rx_status.mactime = le64_to_cpu(hdr->mac_time);
270         rx_status.flag |= RX_FLAG_TSFT;
271         if (flags & (1 << 13))
272                 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
273         ieee80211_rx_irqsafe(dev, skb, &rx_status);
274
275         skb = dev_alloc_skb(RTL8187_MAX_RX);
276         if (unlikely(!skb)) {
277                 usb_free_urb(urb);
278                 /* TODO check rx queue length and refill *somewhere* */
279                 return;
280         }
281
282         info = (struct rtl8187_rx_info *)skb->cb;
283         info->urb = urb;
284         info->dev = dev;
285         urb->transfer_buffer = skb_tail_pointer(skb);
286         urb->context = skb;
287         skb_queue_tail(&priv->rx_queue, skb);
288
289         usb_submit_urb(urb, GFP_ATOMIC);
290 }
291
292 static int rtl8187_init_urbs(struct ieee80211_hw *dev)
293 {
294         struct rtl8187_priv *priv = dev->priv;
295         struct urb *entry;
296         struct sk_buff *skb;
297         struct rtl8187_rx_info *info;
298
299         while (skb_queue_len(&priv->rx_queue) < 8) {
300                 skb = __dev_alloc_skb(RTL8187_MAX_RX, GFP_KERNEL);
301                 if (!skb)
302                         break;
303                 entry = usb_alloc_urb(0, GFP_KERNEL);
304                 if (!entry) {
305                         kfree_skb(skb);
306                         break;
307                 }
308                 usb_fill_bulk_urb(entry, priv->udev,
309                                   usb_rcvbulkpipe(priv->udev, 1),
310                                   skb_tail_pointer(skb),
311                                   RTL8187_MAX_RX, rtl8187_rx_cb, skb);
312                 info = (struct rtl8187_rx_info *)skb->cb;
313                 info->urb = entry;
314                 info->dev = dev;
315                 skb_queue_tail(&priv->rx_queue, skb);
316                 usb_submit_urb(entry, GFP_KERNEL);
317         }
318
319         return 0;
320 }
321
322 static int rtl8187_init_hw(struct ieee80211_hw *dev)
323 {
324         struct rtl8187_priv *priv = dev->priv;
325         u8 reg;
326         int i;
327
328         /* reset */
329         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
330         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
331         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
332         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
333         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
334         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
335         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
336
337         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
338
339         msleep(200);
340         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x10);
341         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x11);
342         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x00);
343         msleep(200);
344
345         reg = rtl818x_ioread8(priv, &priv->map->CMD);
346         reg &= (1 << 1);
347         reg |= RTL818X_CMD_RESET;
348         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
349
350         i = 10;
351         do {
352                 msleep(2);
353                 if (!(rtl818x_ioread8(priv, &priv->map->CMD) &
354                       RTL818X_CMD_RESET))
355                         break;
356         } while (--i);
357
358         if (!i) {
359                 printk(KERN_ERR "%s: Reset timeout!\n", wiphy_name(dev->wiphy));
360                 return -ETIMEDOUT;
361         }
362
363         /* reload registers from eeprom */
364         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
365
366         i = 10;
367         do {
368                 msleep(4);
369                 if (!(rtl818x_ioread8(priv, &priv->map->EEPROM_CMD) &
370                       RTL818X_EEPROM_CMD_CONFIG))
371                         break;
372         } while (--i);
373
374         if (!i) {
375                 printk(KERN_ERR "%s: eeprom reset timeout!\n",
376                        wiphy_name(dev->wiphy));
377                 return -ETIMEDOUT;
378         }
379
380         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
381         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
382         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
383         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
384         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
385         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
386         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
387
388         /* setup card */
389         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
390         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
391
392         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
393         rtl818x_iowrite8(priv, &priv->map->GPIO, 1);
394         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
395
396         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
397
398         rtl818x_iowrite16(priv, (__le16 *)0xFFF4, 0xFFFF);
399         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
400         reg &= 0x3F;
401         reg |= 0x80;
402         rtl818x_iowrite8(priv, &priv->map->CONFIG1, reg);
403
404         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
405
406         rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
407         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
408         rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
409
410         // TODO: set RESP_RATE and BRSR properly
411         rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
412         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
413
414         /* host_usb_init */
415         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
416         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
417         reg = rtl818x_ioread8(priv, (u8 *)0xFE53);
418         rtl818x_iowrite8(priv, (u8 *)0xFE53, reg | (1 << 7));
419         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
420         rtl818x_iowrite8(priv, &priv->map->GPIO, 0x20);
421         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
422         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x80);
423         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x80);
424         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x80);
425         msleep(100);
426
427         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x000a8008);
428         rtl818x_iowrite16(priv, &priv->map->BRSR, 0xFFFF);
429         rtl818x_iowrite32(priv, &priv->map->RF_PARA, 0x00100044);
430         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
431         rtl818x_iowrite8(priv, &priv->map->CONFIG3, 0x44);
432         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
433         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FF7);
434         msleep(100);
435
436         priv->rf->init(dev);
437
438         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
439         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
440         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
441         rtl818x_iowrite16(priv, (__le16 *)0xFFFE, 0x10);
442         rtl818x_iowrite8(priv, &priv->map->TALLY_SEL, 0x80);
443         rtl818x_iowrite8(priv, (u8 *)0xFFFF, 0x60);
444         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
445
446         return 0;
447 }
448
449 static int rtl8187_start(struct ieee80211_hw *dev)
450 {
451         struct rtl8187_priv *priv = dev->priv;
452         u32 reg;
453         int ret;
454
455         ret = rtl8187_init_hw(dev);
456         if (ret)
457                 return ret;
458
459         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
460
461         rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
462         rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
463
464         rtl8187_init_urbs(dev);
465
466         reg = RTL818X_RX_CONF_ONLYERLPKT |
467               RTL818X_RX_CONF_RX_AUTORESETPHY |
468               RTL818X_RX_CONF_BSSID |
469               RTL818X_RX_CONF_MGMT |
470               RTL818X_RX_CONF_DATA |
471               (7 << 13 /* RX FIFO threshold NONE */) |
472               (7 << 10 /* MAX RX DMA */) |
473               RTL818X_RX_CONF_BROADCAST |
474               RTL818X_RX_CONF_NICMAC;
475
476         priv->rx_conf = reg;
477         rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
478
479         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
480         reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
481         reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
482         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
483
484         reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
485         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
486         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
487         reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
488         rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
489
490         reg  = RTL818X_TX_CONF_CW_MIN |
491                (7 << 21 /* MAX TX DMA */) |
492                RTL818X_TX_CONF_NO_ICV;
493         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
494
495         reg = rtl818x_ioread8(priv, &priv->map->CMD);
496         reg |= RTL818X_CMD_TX_ENABLE;
497         reg |= RTL818X_CMD_RX_ENABLE;
498         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
499
500         return 0;
501 }
502
503 static void rtl8187_stop(struct ieee80211_hw *dev)
504 {
505         struct rtl8187_priv *priv = dev->priv;
506         struct rtl8187_rx_info *info;
507         struct sk_buff *skb;
508         u32 reg;
509
510         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
511
512         reg = rtl818x_ioread8(priv, &priv->map->CMD);
513         reg &= ~RTL818X_CMD_TX_ENABLE;
514         reg &= ~RTL818X_CMD_RX_ENABLE;
515         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
516
517         priv->rf->stop(dev);
518
519         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
520         reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
521         rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
522         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
523
524         while ((skb = skb_dequeue(&priv->rx_queue))) {
525                 info = (struct rtl8187_rx_info *)skb->cb;
526                 usb_kill_urb(info->urb);
527                 kfree_skb(skb);
528         }
529         return;
530 }
531
532 static int rtl8187_add_interface(struct ieee80211_hw *dev,
533                                  struct ieee80211_if_init_conf *conf)
534 {
535         struct rtl8187_priv *priv = dev->priv;
536         int i;
537
538         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
539                 return -EOPNOTSUPP;
540
541         switch (conf->type) {
542         case IEEE80211_IF_TYPE_STA:
543                 priv->mode = conf->type;
544                 break;
545         default:
546                 return -EOPNOTSUPP;
547         }
548
549         priv->vif = conf->vif;
550
551         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
552         for (i = 0; i < ETH_ALEN; i++)
553                 rtl818x_iowrite8(priv, &priv->map->MAC[i],
554                                  ((u8 *)conf->mac_addr)[i]);
555         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
556
557         return 0;
558 }
559
560 static void rtl8187_remove_interface(struct ieee80211_hw *dev,
561                                      struct ieee80211_if_init_conf *conf)
562 {
563         struct rtl8187_priv *priv = dev->priv;
564         priv->mode = IEEE80211_IF_TYPE_MNTR;
565         priv->vif = NULL;
566 }
567
568 static int rtl8187_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
569 {
570         struct rtl8187_priv *priv = dev->priv;
571         u32 reg;
572
573         reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
574         /* Enable TX loopback on MAC level to avoid TX during channel
575          * changes, as this has be seen to causes problems and the
576          * card will stop work until next reset
577          */
578         rtl818x_iowrite32(priv, &priv->map->TX_CONF,
579                           reg | RTL818X_TX_CONF_LOOPBACK_MAC);
580         msleep(10);
581         priv->rf->set_chan(dev, conf);
582         msleep(10);
583         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
584
585         rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
586
587         if (conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
588                 rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9);
589                 rtl818x_iowrite8(priv, &priv->map->DIFS, 0x14);
590                 rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x14);
591                 rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0x73);
592         } else {
593                 rtl818x_iowrite8(priv, &priv->map->SLOT, 0x14);
594                 rtl818x_iowrite8(priv, &priv->map->DIFS, 0x24);
595                 rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x24);
596                 rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0xa5);
597         }
598
599         rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
600         rtl818x_iowrite16(priv, &priv->map->ATIMTR_INTERVAL, 100);
601         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
602         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL_TIME, 100);
603         return 0;
604 }
605
606 static int rtl8187_config_interface(struct ieee80211_hw *dev,
607                                     struct ieee80211_vif *vif,
608                                     struct ieee80211_if_conf *conf)
609 {
610         struct rtl8187_priv *priv = dev->priv;
611         int i;
612
613         for (i = 0; i < ETH_ALEN; i++)
614                 rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);
615
616         if (is_valid_ether_addr(conf->bssid))
617                 rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_INFRA);
618         else
619                 rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_NO_LINK);
620
621         return 0;
622 }
623
624 static void rtl8187_configure_filter(struct ieee80211_hw *dev,
625                                      unsigned int changed_flags,
626                                      unsigned int *total_flags,
627                                      int mc_count, struct dev_addr_list *mclist)
628 {
629         struct rtl8187_priv *priv = dev->priv;
630
631         if (changed_flags & FIF_FCSFAIL)
632                 priv->rx_conf ^= RTL818X_RX_CONF_FCS;
633         if (changed_flags & FIF_CONTROL)
634                 priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
635         if (changed_flags & FIF_OTHER_BSS)
636                 priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
637         if (*total_flags & FIF_ALLMULTI || mc_count > 0)
638                 priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
639         else
640                 priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
641
642         *total_flags = 0;
643
644         if (priv->rx_conf & RTL818X_RX_CONF_FCS)
645                 *total_flags |= FIF_FCSFAIL;
646         if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
647                 *total_flags |= FIF_CONTROL;
648         if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
649                 *total_flags |= FIF_OTHER_BSS;
650         if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
651                 *total_flags |= FIF_ALLMULTI;
652
653         rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
654 }
655
656 static const struct ieee80211_ops rtl8187_ops = {
657         .tx                     = rtl8187_tx,
658         .start                  = rtl8187_start,
659         .stop                   = rtl8187_stop,
660         .add_interface          = rtl8187_add_interface,
661         .remove_interface       = rtl8187_remove_interface,
662         .config                 = rtl8187_config,
663         .config_interface       = rtl8187_config_interface,
664         .configure_filter       = rtl8187_configure_filter,
665 };
666
667 static void rtl8187_eeprom_register_read(struct eeprom_93cx6 *eeprom)
668 {
669         struct ieee80211_hw *dev = eeprom->data;
670         struct rtl8187_priv *priv = dev->priv;
671         u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
672
673         eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
674         eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
675         eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
676         eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
677 }
678
679 static void rtl8187_eeprom_register_write(struct eeprom_93cx6 *eeprom)
680 {
681         struct ieee80211_hw *dev = eeprom->data;
682         struct rtl8187_priv *priv = dev->priv;
683         u8 reg = RTL818X_EEPROM_CMD_PROGRAM;
684
685         if (eeprom->reg_data_in)
686                 reg |= RTL818X_EEPROM_CMD_WRITE;
687         if (eeprom->reg_data_out)
688                 reg |= RTL818X_EEPROM_CMD_READ;
689         if (eeprom->reg_data_clock)
690                 reg |= RTL818X_EEPROM_CMD_CK;
691         if (eeprom->reg_chip_select)
692                 reg |= RTL818X_EEPROM_CMD_CS;
693
694         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
695         udelay(10);
696 }
697
698 static int __devinit rtl8187_probe(struct usb_interface *intf,
699                                    const struct usb_device_id *id)
700 {
701         struct usb_device *udev = interface_to_usbdev(intf);
702         struct ieee80211_hw *dev;
703         struct rtl8187_priv *priv;
704         struct eeprom_93cx6 eeprom;
705         struct ieee80211_channel *channel;
706         u16 txpwr, reg;
707         int err, i;
708         DECLARE_MAC_BUF(mac);
709
710         dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8187_ops);
711         if (!dev) {
712                 printk(KERN_ERR "rtl8187: ieee80211 alloc failed\n");
713                 return -ENOMEM;
714         }
715
716         priv = dev->priv;
717
718         SET_IEEE80211_DEV(dev, &intf->dev);
719         usb_set_intfdata(intf, dev);
720         priv->udev = udev;
721
722         usb_get_dev(udev);
723
724         skb_queue_head_init(&priv->rx_queue);
725
726         BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
727         BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));
728
729         memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
730         memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
731         priv->map = (struct rtl818x_csr *)0xFF00;
732
733         priv->band.band = IEEE80211_BAND_2GHZ;
734         priv->band.channels = priv->channels;
735         priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
736         priv->band.bitrates = priv->rates;
737         priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
738         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
739
740
741         priv->mode = IEEE80211_IF_TYPE_MNTR;
742         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
743                      IEEE80211_HW_RX_INCLUDES_FCS;
744         dev->extra_tx_headroom = sizeof(struct rtl8187_tx_hdr);
745         dev->queues = 1;
746         dev->max_rssi = 65;
747         dev->max_signal = 64;
748
749         eeprom.data = dev;
750         eeprom.register_read = rtl8187_eeprom_register_read;
751         eeprom.register_write = rtl8187_eeprom_register_write;
752         if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
753                 eeprom.width = PCI_EEPROM_WIDTH_93C66;
754         else
755                 eeprom.width = PCI_EEPROM_WIDTH_93C46;
756
757         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
758         udelay(10);
759
760         eeprom_93cx6_multiread(&eeprom, RTL8187_EEPROM_MAC_ADDR,
761                                (__le16 __force *)dev->wiphy->perm_addr, 3);
762         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
763                 printk(KERN_WARNING "rtl8187: Invalid hwaddr! Using randomly "
764                        "generated MAC address\n");
765                 random_ether_addr(dev->wiphy->perm_addr);
766         }
767
768         channel = priv->channels;
769         for (i = 0; i < 3; i++) {
770                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_1 + i,
771                                   &txpwr);
772                 (*channel++).hw_value = txpwr & 0xFF;
773                 (*channel++).hw_value = txpwr >> 8;
774         }
775         for (i = 0; i < 2; i++) {
776                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_4 + i,
777                                   &txpwr);
778                 (*channel++).hw_value = txpwr & 0xFF;
779                 (*channel++).hw_value = txpwr >> 8;
780         }
781         for (i = 0; i < 2; i++) {
782                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6 + i,
783                                   &txpwr);
784                 (*channel++).hw_value = txpwr & 0xFF;
785                 (*channel++).hw_value = txpwr >> 8;
786         }
787
788         eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
789                           &priv->txpwr_base);
790
791         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
792         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
793         /* 0 means asic B-cut, we should use SW 3 wire
794          * bit-by-bit banging for radio. 1 means we can use
795          * USB specific request to write radio registers */
796         priv->asic_rev = rtl818x_ioread8(priv, (u8 *)0xFFFE) & 0x3;
797         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
798         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
799
800         priv->rf = rtl8187_detect_rf(dev);
801
802         err = ieee80211_register_hw(dev);
803         if (err) {
804                 printk(KERN_ERR "rtl8187: Cannot register device\n");
805                 goto err_free_dev;
806         }
807
808         printk(KERN_INFO "%s: hwaddr %s, rtl8187 V%d + %s\n",
809                wiphy_name(dev->wiphy), print_mac(mac, dev->wiphy->perm_addr),
810                priv->asic_rev, priv->rf->name);
811
812         return 0;
813
814  err_free_dev:
815         ieee80211_free_hw(dev);
816         usb_set_intfdata(intf, NULL);
817         usb_put_dev(udev);
818         return err;
819 }
820
821 static void __devexit rtl8187_disconnect(struct usb_interface *intf)
822 {
823         struct ieee80211_hw *dev = usb_get_intfdata(intf);
824         struct rtl8187_priv *priv;
825
826         if (!dev)
827                 return;
828
829         ieee80211_unregister_hw(dev);
830
831         priv = dev->priv;
832         usb_put_dev(interface_to_usbdev(intf));
833         ieee80211_free_hw(dev);
834 }
835
836 static struct usb_driver rtl8187_driver = {
837         .name           = KBUILD_MODNAME,
838         .id_table       = rtl8187_table,
839         .probe          = rtl8187_probe,
840         .disconnect     = rtl8187_disconnect,
841 };
842
843 static int __init rtl8187_init(void)
844 {
845         return usb_register(&rtl8187_driver);
846 }
847
848 static void __exit rtl8187_exit(void)
849 {
850         usb_deregister(&rtl8187_driver);
851 }
852
853 module_init(rtl8187_init);
854 module_exit(rtl8187_exit);