Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb-2.6
[sfrench/cifs-2.6.git] / 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 void rtl8187_iowrite_async_cb(struct urb *urb)
49 {
50         kfree(urb->context);
51         usb_free_urb(urb);
52 }
53
54 static void rtl8187_iowrite_async(struct rtl8187_priv *priv, __le16 addr,
55                                   void *data, u16 len)
56 {
57         struct usb_ctrlrequest *dr;
58         struct urb *urb;
59         struct rtl8187_async_write_data {
60                 u8 data[4];
61                 struct usb_ctrlrequest dr;
62         } *buf;
63
64         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
65         if (!buf)
66                 return;
67
68         urb = usb_alloc_urb(0, GFP_ATOMIC);
69         if (!urb) {
70                 kfree(buf);
71                 return;
72         }
73
74         dr = &buf->dr;
75
76         dr->bRequestType = RTL8187_REQT_WRITE;
77         dr->bRequest = RTL8187_REQ_SET_REG;
78         dr->wValue = addr;
79         dr->wIndex = 0;
80         dr->wLength = cpu_to_le16(len);
81
82         memcpy(buf, data, len);
83
84         usb_fill_control_urb(urb, priv->udev, usb_sndctrlpipe(priv->udev, 0),
85                              (unsigned char *)dr, buf, len,
86                              rtl8187_iowrite_async_cb, buf);
87         usb_submit_urb(urb, GFP_ATOMIC);
88 }
89
90 static inline void rtl818x_iowrite32_async(struct rtl8187_priv *priv,
91                                            __le32 *addr, u32 val)
92 {
93         __le32 buf = cpu_to_le32(val);
94
95         rtl8187_iowrite_async(priv, cpu_to_le16((unsigned long)addr),
96                               &buf, sizeof(buf));
97 }
98
99 void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
100 {
101         struct rtl8187_priv *priv = dev->priv;
102
103         data <<= 8;
104         data |= addr | 0x80;
105
106         rtl818x_iowrite8(priv, &priv->map->PHY[3], (data >> 24) & 0xFF);
107         rtl818x_iowrite8(priv, &priv->map->PHY[2], (data >> 16) & 0xFF);
108         rtl818x_iowrite8(priv, &priv->map->PHY[1], (data >> 8) & 0xFF);
109         rtl818x_iowrite8(priv, &priv->map->PHY[0], data & 0xFF);
110
111         msleep(1);
112 }
113
114 static void rtl8187_tx_cb(struct urb *urb)
115 {
116         struct ieee80211_tx_status status;
117         struct sk_buff *skb = (struct sk_buff *)urb->context;
118         struct rtl8187_tx_info *info = (struct rtl8187_tx_info *)skb->cb;
119
120         memset(&status, 0, sizeof(status));
121
122         usb_free_urb(info->urb);
123         if (info->control)
124                 memcpy(&status.control, info->control, sizeof(status.control));
125         kfree(info->control);
126         skb_pull(skb, sizeof(struct rtl8187_tx_hdr));
127         status.flags |= IEEE80211_TX_STATUS_ACK;
128         ieee80211_tx_status_irqsafe(info->dev, skb, &status);
129 }
130
131 static int rtl8187_tx(struct ieee80211_hw *dev, struct sk_buff *skb,
132                       struct ieee80211_tx_control *control)
133 {
134         struct rtl8187_priv *priv = dev->priv;
135         struct rtl8187_tx_hdr *hdr;
136         struct rtl8187_tx_info *info;
137         struct urb *urb;
138         __le16 rts_dur = 0;
139         u32 flags;
140
141         urb = usb_alloc_urb(0, GFP_ATOMIC);
142         if (!urb) {
143                 kfree_skb(skb);
144                 return 0;
145         }
146
147         flags = skb->len;
148         flags |= RTL8187_TX_FLAG_NO_ENCRYPT;
149         flags |= control->rts_cts_rate << 19;
150         flags |= control->tx_rate << 24;
151         if (ieee80211_get_morefrag((struct ieee80211_hdr *)skb->data))
152                 flags |= RTL8187_TX_FLAG_MORE_FRAG;
153         if (control->flags & IEEE80211_TXCTL_USE_RTS_CTS) {
154                 flags |= RTL8187_TX_FLAG_RTS;
155                 rts_dur = ieee80211_rts_duration(dev, priv->vif,
156                                                  skb->len, control);
157         }
158         if (control->flags & IEEE80211_TXCTL_USE_CTS_PROTECT)
159                 flags |= RTL8187_TX_FLAG_CTS;
160
161         hdr = (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
162         hdr->flags = cpu_to_le32(flags);
163         hdr->len = 0;
164         hdr->rts_duration = rts_dur;
165         hdr->retry = cpu_to_le32(control->retry_limit << 8);
166
167         info = (struct rtl8187_tx_info *)skb->cb;
168         info->control = kmemdup(control, sizeof(*control), GFP_ATOMIC);
169         info->urb = urb;
170         info->dev = dev;
171         usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, 2),
172                           hdr, skb->len, rtl8187_tx_cb, skb);
173         usb_submit_urb(urb, GFP_ATOMIC);
174
175         return 0;
176 }
177
178 static void rtl8187_rx_cb(struct urb *urb)
179 {
180         struct sk_buff *skb = (struct sk_buff *)urb->context;
181         struct rtl8187_rx_info *info = (struct rtl8187_rx_info *)skb->cb;
182         struct ieee80211_hw *dev = info->dev;
183         struct rtl8187_priv *priv = dev->priv;
184         struct rtl8187_rx_hdr *hdr;
185         struct ieee80211_rx_status rx_status = { 0 };
186         int rate, signal;
187         u32 flags;
188
189         spin_lock(&priv->rx_queue.lock);
190         if (skb->next)
191                 __skb_unlink(skb, &priv->rx_queue);
192         else {
193                 spin_unlock(&priv->rx_queue.lock);
194                 return;
195         }
196         spin_unlock(&priv->rx_queue.lock);
197
198         if (unlikely(urb->status)) {
199                 usb_free_urb(urb);
200                 dev_kfree_skb_irq(skb);
201                 return;
202         }
203
204         skb_put(skb, urb->actual_length);
205         hdr = (struct rtl8187_rx_hdr *)(skb_tail_pointer(skb) - sizeof(*hdr));
206         flags = le32_to_cpu(hdr->flags);
207         skb_trim(skb, flags & 0x0FFF);
208
209         signal = hdr->agc >> 1;
210         rate = (flags >> 20) & 0xF;
211         if (rate > 3) { /* OFDM rate */
212                 if (signal > 90)
213                         signal = 90;
214                 else if (signal < 25)
215                         signal = 25;
216                 signal = 90 - signal;
217         } else {        /* CCK rate */
218                 if (signal > 95)
219                         signal = 95;
220                 else if (signal < 30)
221                         signal = 30;
222                 signal = 95 - signal;
223         }
224
225         rx_status.antenna = (hdr->signal >> 7) & 1;
226         rx_status.signal = 64 - min(hdr->noise, (u8)64);
227         rx_status.ssi = signal;
228         rx_status.rate = rate;
229         rx_status.freq = dev->conf.freq;
230         rx_status.channel = dev->conf.channel;
231         rx_status.phymode = dev->conf.phymode;
232         rx_status.mactime = le64_to_cpu(hdr->mac_time);
233         rx_status.flag |= RX_FLAG_TSFT;
234         if (flags & (1 << 13))
235                 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
236         ieee80211_rx_irqsafe(dev, skb, &rx_status);
237
238         skb = dev_alloc_skb(RTL8187_MAX_RX);
239         if (unlikely(!skb)) {
240                 usb_free_urb(urb);
241                 /* TODO check rx queue length and refill *somewhere* */
242                 return;
243         }
244
245         info = (struct rtl8187_rx_info *)skb->cb;
246         info->urb = urb;
247         info->dev = dev;
248         urb->transfer_buffer = skb_tail_pointer(skb);
249         urb->context = skb;
250         skb_queue_tail(&priv->rx_queue, skb);
251
252         usb_submit_urb(urb, GFP_ATOMIC);
253 }
254
255 static int rtl8187_init_urbs(struct ieee80211_hw *dev)
256 {
257         struct rtl8187_priv *priv = dev->priv;
258         struct urb *entry;
259         struct sk_buff *skb;
260         struct rtl8187_rx_info *info;
261
262         while (skb_queue_len(&priv->rx_queue) < 8) {
263                 skb = __dev_alloc_skb(RTL8187_MAX_RX, GFP_KERNEL);
264                 if (!skb)
265                         break;
266                 entry = usb_alloc_urb(0, GFP_KERNEL);
267                 if (!entry) {
268                         kfree_skb(skb);
269                         break;
270                 }
271                 usb_fill_bulk_urb(entry, priv->udev,
272                                   usb_rcvbulkpipe(priv->udev, 1),
273                                   skb_tail_pointer(skb),
274                                   RTL8187_MAX_RX, rtl8187_rx_cb, skb);
275                 info = (struct rtl8187_rx_info *)skb->cb;
276                 info->urb = entry;
277                 info->dev = dev;
278                 skb_queue_tail(&priv->rx_queue, skb);
279                 usb_submit_urb(entry, GFP_KERNEL);
280         }
281
282         return 0;
283 }
284
285 static int rtl8187_init_hw(struct ieee80211_hw *dev)
286 {
287         struct rtl8187_priv *priv = dev->priv;
288         u8 reg;
289         int i;
290
291         /* reset */
292         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
293         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
294         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
295         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
296         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
297         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
298         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
299
300         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
301
302         msleep(200);
303         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x10);
304         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x11);
305         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x00);
306         msleep(200);
307
308         reg = rtl818x_ioread8(priv, &priv->map->CMD);
309         reg &= (1 << 1);
310         reg |= RTL818X_CMD_RESET;
311         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
312
313         i = 10;
314         do {
315                 msleep(2);
316                 if (!(rtl818x_ioread8(priv, &priv->map->CMD) &
317                       RTL818X_CMD_RESET))
318                         break;
319         } while (--i);
320
321         if (!i) {
322                 printk(KERN_ERR "%s: Reset timeout!\n", wiphy_name(dev->wiphy));
323                 return -ETIMEDOUT;
324         }
325
326         /* reload registers from eeprom */
327         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
328
329         i = 10;
330         do {
331                 msleep(4);
332                 if (!(rtl818x_ioread8(priv, &priv->map->EEPROM_CMD) &
333                       RTL818X_EEPROM_CMD_CONFIG))
334                         break;
335         } while (--i);
336
337         if (!i) {
338                 printk(KERN_ERR "%s: eeprom reset timeout!\n",
339                        wiphy_name(dev->wiphy));
340                 return -ETIMEDOUT;
341         }
342
343         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
344         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
345         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg | RTL818X_CONFIG3_ANAPARAM_WRITE);
346         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, RTL8225_ANAPARAM_ON);
347         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, RTL8225_ANAPARAM2_ON);
348         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg & ~RTL818X_CONFIG3_ANAPARAM_WRITE);
349         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
350
351         /* setup card */
352         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
353         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
354
355         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
356         rtl818x_iowrite8(priv, &priv->map->GPIO, 1);
357         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
358
359         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
360
361         rtl818x_iowrite16(priv, (__le16 *)0xFFF4, 0xFFFF);
362         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
363         reg &= 0x3F;
364         reg |= 0x80;
365         rtl818x_iowrite8(priv, &priv->map->CONFIG1, reg);
366
367         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
368
369         rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
370         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
371         rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0x81);
372
373         // TODO: set RESP_RATE and BRSR properly
374         rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
375         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
376
377         /* host_usb_init */
378         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
379         rtl818x_iowrite8(priv, &priv->map->GPIO, 0);
380         reg = rtl818x_ioread8(priv, (u8 *)0xFE53);
381         rtl818x_iowrite8(priv, (u8 *)0xFE53, reg | (1 << 7));
382         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
383         rtl818x_iowrite8(priv, &priv->map->GPIO, 0x20);
384         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
385         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x80);
386         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x80);
387         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x80);
388         msleep(100);
389
390         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x000a8008);
391         rtl818x_iowrite16(priv, &priv->map->BRSR, 0xFFFF);
392         rtl818x_iowrite32(priv, &priv->map->RF_PARA, 0x00100044);
393         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
394         rtl818x_iowrite8(priv, &priv->map->CONFIG3, 0x44);
395         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
396         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FF7);
397         msleep(100);
398
399         priv->rf->init(dev);
400
401         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
402         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
403         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
404         rtl818x_iowrite16(priv, (__le16 *)0xFFFE, 0x10);
405         rtl818x_iowrite8(priv, &priv->map->TALLY_SEL, 0x80);
406         rtl818x_iowrite8(priv, (u8 *)0xFFFF, 0x60);
407         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
408
409         return 0;
410 }
411
412 static int rtl8187_start(struct ieee80211_hw *dev)
413 {
414         struct rtl8187_priv *priv = dev->priv;
415         u32 reg;
416         int ret;
417
418         ret = rtl8187_init_hw(dev);
419         if (ret)
420                 return ret;
421
422         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
423
424         rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
425         rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
426
427         rtl8187_init_urbs(dev);
428
429         reg = RTL818X_RX_CONF_ONLYERLPKT |
430               RTL818X_RX_CONF_RX_AUTORESETPHY |
431               RTL818X_RX_CONF_BSSID |
432               RTL818X_RX_CONF_MGMT |
433               RTL818X_RX_CONF_DATA |
434               (7 << 13 /* RX FIFO threshold NONE */) |
435               (7 << 10 /* MAX RX DMA */) |
436               RTL818X_RX_CONF_BROADCAST |
437               RTL818X_RX_CONF_NICMAC;
438
439         priv->rx_conf = reg;
440         rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
441
442         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
443         reg &= ~RTL818X_CW_CONF_PERPACKET_CW_SHIFT;
444         reg |= RTL818X_CW_CONF_PERPACKET_RETRY_SHIFT;
445         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
446
447         reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
448         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN_SHIFT;
449         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL_SHIFT;
450         reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
451         rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
452
453         reg  = RTL818X_TX_CONF_CW_MIN |
454                (7 << 21 /* MAX TX DMA */) |
455                RTL818X_TX_CONF_NO_ICV;
456         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
457
458         reg = rtl818x_ioread8(priv, &priv->map->CMD);
459         reg |= RTL818X_CMD_TX_ENABLE;
460         reg |= RTL818X_CMD_RX_ENABLE;
461         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
462
463         return 0;
464 }
465
466 static void rtl8187_stop(struct ieee80211_hw *dev)
467 {
468         struct rtl8187_priv *priv = dev->priv;
469         struct rtl8187_rx_info *info;
470         struct sk_buff *skb;
471         u32 reg;
472
473         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
474
475         reg = rtl818x_ioread8(priv, &priv->map->CMD);
476         reg &= ~RTL818X_CMD_TX_ENABLE;
477         reg &= ~RTL818X_CMD_RX_ENABLE;
478         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
479
480         priv->rf->stop(dev);
481
482         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
483         reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
484         rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
485         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
486
487         while ((skb = skb_dequeue(&priv->rx_queue))) {
488                 info = (struct rtl8187_rx_info *)skb->cb;
489                 usb_kill_urb(info->urb);
490                 kfree_skb(skb);
491         }
492         return;
493 }
494
495 static int rtl8187_add_interface(struct ieee80211_hw *dev,
496                                  struct ieee80211_if_init_conf *conf)
497 {
498         struct rtl8187_priv *priv = dev->priv;
499         int i;
500
501         if (priv->mode != IEEE80211_IF_TYPE_MNTR)
502                 return -EOPNOTSUPP;
503
504         switch (conf->type) {
505         case IEEE80211_IF_TYPE_STA:
506                 priv->mode = conf->type;
507                 break;
508         default:
509                 return -EOPNOTSUPP;
510         }
511
512         priv->vif = conf->vif;
513
514         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
515         for (i = 0; i < ETH_ALEN; i++)
516                 rtl818x_iowrite8(priv, &priv->map->MAC[i],
517                                  ((u8 *)conf->mac_addr)[i]);
518         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
519
520         return 0;
521 }
522
523 static void rtl8187_remove_interface(struct ieee80211_hw *dev,
524                                      struct ieee80211_if_init_conf *conf)
525 {
526         struct rtl8187_priv *priv = dev->priv;
527         priv->mode = IEEE80211_IF_TYPE_MNTR;
528         priv->vif = NULL;
529 }
530
531 static int rtl8187_config(struct ieee80211_hw *dev, struct ieee80211_conf *conf)
532 {
533         struct rtl8187_priv *priv = dev->priv;
534         u32 reg;
535
536         reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
537         /* Enable TX loopback on MAC level to avoid TX during channel
538          * changes, as this has be seen to causes problems and the
539          * card will stop work until next reset
540          */
541         rtl818x_iowrite32(priv, &priv->map->TX_CONF,
542                           reg | RTL818X_TX_CONF_LOOPBACK_MAC);
543         msleep(10);
544         priv->rf->set_chan(dev, conf);
545         msleep(10);
546         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
547
548         rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
549
550         if (conf->flags & IEEE80211_CONF_SHORT_SLOT_TIME) {
551                 rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9);
552                 rtl818x_iowrite8(priv, &priv->map->DIFS, 0x14);
553                 rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x14);
554                 rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0x73);
555         } else {
556                 rtl818x_iowrite8(priv, &priv->map->SLOT, 0x14);
557                 rtl818x_iowrite8(priv, &priv->map->DIFS, 0x24);
558                 rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x24);
559                 rtl818x_iowrite8(priv, &priv->map->CW_VAL, 0xa5);
560         }
561
562         rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
563         rtl818x_iowrite16(priv, &priv->map->ATIMTR_INTERVAL, 100);
564         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
565         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL_TIME, 100);
566         return 0;
567 }
568
569 static int rtl8187_config_interface(struct ieee80211_hw *dev,
570                                     struct ieee80211_vif *vif,
571                                     struct ieee80211_if_conf *conf)
572 {
573         struct rtl8187_priv *priv = dev->priv;
574         int i;
575
576         for (i = 0; i < ETH_ALEN; i++)
577                 rtl818x_iowrite8(priv, &priv->map->BSSID[i], conf->bssid[i]);
578
579         if (is_valid_ether_addr(conf->bssid))
580                 rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_INFRA);
581         else
582                 rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_NO_LINK);
583
584         return 0;
585 }
586
587 static void rtl8187_configure_filter(struct ieee80211_hw *dev,
588                                      unsigned int changed_flags,
589                                      unsigned int *total_flags,
590                                      int mc_count, struct dev_addr_list *mclist)
591 {
592         struct rtl8187_priv *priv = dev->priv;
593
594         if (changed_flags & FIF_FCSFAIL)
595                 priv->rx_conf ^= RTL818X_RX_CONF_FCS;
596         if (changed_flags & FIF_CONTROL)
597                 priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
598         if (changed_flags & FIF_OTHER_BSS)
599                 priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
600         if (*total_flags & FIF_ALLMULTI || mc_count > 0)
601                 priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
602         else
603                 priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
604
605         *total_flags = 0;
606
607         if (priv->rx_conf & RTL818X_RX_CONF_FCS)
608                 *total_flags |= FIF_FCSFAIL;
609         if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
610                 *total_flags |= FIF_CONTROL;
611         if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
612                 *total_flags |= FIF_OTHER_BSS;
613         if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
614                 *total_flags |= FIF_ALLMULTI;
615
616         rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
617 }
618
619 static const struct ieee80211_ops rtl8187_ops = {
620         .tx                     = rtl8187_tx,
621         .start                  = rtl8187_start,
622         .stop                   = rtl8187_stop,
623         .add_interface          = rtl8187_add_interface,
624         .remove_interface       = rtl8187_remove_interface,
625         .config                 = rtl8187_config,
626         .config_interface       = rtl8187_config_interface,
627         .configure_filter       = rtl8187_configure_filter,
628 };
629
630 static void rtl8187_eeprom_register_read(struct eeprom_93cx6 *eeprom)
631 {
632         struct ieee80211_hw *dev = eeprom->data;
633         struct rtl8187_priv *priv = dev->priv;
634         u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
635
636         eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
637         eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
638         eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
639         eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
640 }
641
642 static void rtl8187_eeprom_register_write(struct eeprom_93cx6 *eeprom)
643 {
644         struct ieee80211_hw *dev = eeprom->data;
645         struct rtl8187_priv *priv = dev->priv;
646         u8 reg = RTL818X_EEPROM_CMD_PROGRAM;
647
648         if (eeprom->reg_data_in)
649                 reg |= RTL818X_EEPROM_CMD_WRITE;
650         if (eeprom->reg_data_out)
651                 reg |= RTL818X_EEPROM_CMD_READ;
652         if (eeprom->reg_data_clock)
653                 reg |= RTL818X_EEPROM_CMD_CK;
654         if (eeprom->reg_chip_select)
655                 reg |= RTL818X_EEPROM_CMD_CS;
656
657         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
658         udelay(10);
659 }
660
661 static int __devinit rtl8187_probe(struct usb_interface *intf,
662                                    const struct usb_device_id *id)
663 {
664         struct usb_device *udev = interface_to_usbdev(intf);
665         struct ieee80211_hw *dev;
666         struct rtl8187_priv *priv;
667         struct eeprom_93cx6 eeprom;
668         struct ieee80211_channel *channel;
669         u16 txpwr, reg;
670         int err, i;
671         DECLARE_MAC_BUF(mac);
672
673         dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8187_ops);
674         if (!dev) {
675                 printk(KERN_ERR "rtl8187: ieee80211 alloc failed\n");
676                 return -ENOMEM;
677         }
678
679         priv = dev->priv;
680
681         SET_IEEE80211_DEV(dev, &intf->dev);
682         usb_set_intfdata(intf, dev);
683         priv->udev = udev;
684
685         usb_get_dev(udev);
686
687         skb_queue_head_init(&priv->rx_queue);
688         memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
689         memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
690         priv->map = (struct rtl818x_csr *)0xFF00;
691         priv->modes[0].mode = MODE_IEEE80211G;
692         priv->modes[0].num_rates = ARRAY_SIZE(rtl818x_rates);
693         priv->modes[0].rates = priv->rates;
694         priv->modes[0].num_channels = ARRAY_SIZE(rtl818x_channels);
695         priv->modes[0].channels = priv->channels;
696         priv->modes[1].mode = MODE_IEEE80211B;
697         priv->modes[1].num_rates = 4;
698         priv->modes[1].rates = priv->rates;
699         priv->modes[1].num_channels = ARRAY_SIZE(rtl818x_channels);
700         priv->modes[1].channels = priv->channels;
701         priv->mode = IEEE80211_IF_TYPE_MNTR;
702         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
703                      IEEE80211_HW_RX_INCLUDES_FCS;
704         dev->extra_tx_headroom = sizeof(struct rtl8187_tx_hdr);
705         dev->queues = 1;
706         dev->max_rssi = 65;
707         dev->max_signal = 64;
708
709         for (i = 0; i < 2; i++)
710                 if ((err = ieee80211_register_hwmode(dev, &priv->modes[i])))
711                         goto err_free_dev;
712
713         eeprom.data = dev;
714         eeprom.register_read = rtl8187_eeprom_register_read;
715         eeprom.register_write = rtl8187_eeprom_register_write;
716         if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
717                 eeprom.width = PCI_EEPROM_WIDTH_93C66;
718         else
719                 eeprom.width = PCI_EEPROM_WIDTH_93C46;
720
721         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
722         udelay(10);
723
724         eeprom_93cx6_multiread(&eeprom, RTL8187_EEPROM_MAC_ADDR,
725                                (__le16 __force *)dev->wiphy->perm_addr, 3);
726         if (!is_valid_ether_addr(dev->wiphy->perm_addr)) {
727                 printk(KERN_WARNING "rtl8187: Invalid hwaddr! Using randomly "
728                        "generated MAC address\n");
729                 random_ether_addr(dev->wiphy->perm_addr);
730         }
731
732         channel = priv->channels;
733         for (i = 0; i < 3; i++) {
734                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_1 + i,
735                                   &txpwr);
736                 (*channel++).val = txpwr & 0xFF;
737                 (*channel++).val = txpwr >> 8;
738         }
739         for (i = 0; i < 2; i++) {
740                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_4 + i,
741                                   &txpwr);
742                 (*channel++).val = txpwr & 0xFF;
743                 (*channel++).val = txpwr >> 8;
744         }
745         for (i = 0; i < 2; i++) {
746                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6 + i,
747                                   &txpwr);
748                 (*channel++).val = txpwr & 0xFF;
749                 (*channel++).val = txpwr >> 8;
750         }
751
752         eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
753                           &priv->txpwr_base);
754
755         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
756         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
757         /* 0 means asic B-cut, we should use SW 3 wire
758          * bit-by-bit banging for radio. 1 means we can use
759          * USB specific request to write radio registers */
760         priv->asic_rev = rtl818x_ioread8(priv, (u8 *)0xFFFE) & 0x3;
761         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
762         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
763
764         priv->rf = rtl8187_detect_rf(dev);
765
766         err = ieee80211_register_hw(dev);
767         if (err) {
768                 printk(KERN_ERR "rtl8187: Cannot register device\n");
769                 goto err_free_dev;
770         }
771
772         printk(KERN_INFO "%s: hwaddr %s, rtl8187 V%d + %s\n",
773                wiphy_name(dev->wiphy), print_mac(mac, dev->wiphy->perm_addr),
774                priv->asic_rev, priv->rf->name);
775
776         return 0;
777
778  err_free_dev:
779         ieee80211_free_hw(dev);
780         usb_set_intfdata(intf, NULL);
781         usb_put_dev(udev);
782         return err;
783 }
784
785 static void __devexit rtl8187_disconnect(struct usb_interface *intf)
786 {
787         struct ieee80211_hw *dev = usb_get_intfdata(intf);
788         struct rtl8187_priv *priv;
789
790         if (!dev)
791                 return;
792
793         ieee80211_unregister_hw(dev);
794
795         priv = dev->priv;
796         usb_put_dev(interface_to_usbdev(intf));
797         ieee80211_free_hw(dev);
798 }
799
800 static struct usb_driver rtl8187_driver = {
801         .name           = KBUILD_MODNAME,
802         .id_table       = rtl8187_table,
803         .probe          = rtl8187_probe,
804         .disconnect     = rtl8187_disconnect,
805 };
806
807 static int __init rtl8187_init(void)
808 {
809         return usb_register(&rtl8187_driver);
810 }
811
812 static void __exit rtl8187_exit(void)
813 {
814         usb_deregister(&rtl8187_driver);
815 }
816
817 module_init(rtl8187_init);
818 module_exit(rtl8187_exit);