Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/drivers/net/wireless/rtl818x/rtl8187/dev.c

  1 /*
  2  * Linux device driver for RTL8187
  3  *
  4  * Copyright 2007 Michael Wu <flamingice@sourmilk.net>
  5  * Copyright 2007 Andrea Merello <andrea.merello@gmail.com>
  6  *
  7  * Based on the r8187 driver, which is:
  8  * Copyright 2005 Andrea Merello <andrea.merello@gmail.com>, et al.
  9  *
 10  * The driver was extended to the RTL8187B in 2008 by:
 11  *      Herton Ronaldo Krzesinski <herton@mandriva.com.br>
 12  *      Hin-Tak Leung <htl10@users.sourceforge.net>
 13  *      Larry Finger <Larry.Finger@lwfinger.net>
 14  *
 15  * Magic delays and register offsets below are taken from the original
 16  * r8187 driver sources.  Thanks to Realtek for their support!
 17  *
 18  * This program is free software; you can redistribute it and/or modify
 19  * it under the terms of the GNU General Public License version 2 as
 20  * published by the Free Software Foundation.
 21  */
 22 
 23 #include <linux/usb.h>
 24 #include <linux/slab.h>
 25 #include <linux/delay.h>
 26 #include <linux/etherdevice.h>
 27 #include <linux/eeprom_93cx6.h>
 28 #include <linux/module.h>
 29 #include <net/mac80211.h>
 30 
 31 #include "rtl8187.h"
 32 #include "rtl8225.h"
 33 #ifdef CONFIG_RTL8187_LEDS
 34 #include "leds.h"
 35 #endif
 36 #include "rfkill.h"
 37 
 38 MODULE_AUTHOR("Michael Wu <flamingice@sourmilk.net>");
 39 MODULE_AUTHOR("Andrea Merello <andrea.merello@gmail.com>");
 40 MODULE_AUTHOR("Herton Ronaldo Krzesinski <herton@mandriva.com.br>");
 41 MODULE_AUTHOR("Hin-Tak Leung <htl10@users.sourceforge.net>");
 42 MODULE_AUTHOR("Larry Finger <Larry.Finger@lwfinger.net>");
 43 MODULE_DESCRIPTION("RTL8187/RTL8187B USB wireless driver");
 44 MODULE_LICENSE("GPL");
 45 
 46 static struct usb_device_id rtl8187_table[] = {
 47         /* Asus */
 48         {USB_DEVICE(0x0b05, 0x171d), .driver_info = DEVICE_RTL8187},
 49         /* Belkin */
 50         {USB_DEVICE(0x050d, 0x705e), .driver_info = DEVICE_RTL8187B},
 51         /* Realtek */
 52         {USB_DEVICE(0x0bda, 0x8187), .driver_info = DEVICE_RTL8187},
 53         {USB_DEVICE(0x0bda, 0x8189), .driver_info = DEVICE_RTL8187B},
 54         {USB_DEVICE(0x0bda, 0x8197), .driver_info = DEVICE_RTL8187B},
 55         {USB_DEVICE(0x0bda, 0x8198), .driver_info = DEVICE_RTL8187B},
 56         /* Surecom */
 57         {USB_DEVICE(0x0769, 0x11F2), .driver_info = DEVICE_RTL8187},
 58         /* Logitech */
 59         {USB_DEVICE(0x0789, 0x010C), .driver_info = DEVICE_RTL8187},
 60         /* Netgear */
 61         {USB_DEVICE(0x0846, 0x6100), .driver_info = DEVICE_RTL8187},
 62         {USB_DEVICE(0x0846, 0x6a00), .driver_info = DEVICE_RTL8187},
 63         {USB_DEVICE(0x0846, 0x4260), .driver_info = DEVICE_RTL8187B},
 64         /* HP */
 65         {USB_DEVICE(0x03f0, 0xca02), .driver_info = DEVICE_RTL8187},
 66         /* Sitecom */
 67         {USB_DEVICE(0x0df6, 0x000d), .driver_info = DEVICE_RTL8187},
 68         {USB_DEVICE(0x0df6, 0x0028), .driver_info = DEVICE_RTL8187B},
 69         {USB_DEVICE(0x0df6, 0x0029), .driver_info = DEVICE_RTL8187B},
 70         /* Sphairon Access Systems GmbH */
 71         {USB_DEVICE(0x114B, 0x0150), .driver_info = DEVICE_RTL8187},
 72         /* Dick Smith Electronics */
 73         {USB_DEVICE(0x1371, 0x9401), .driver_info = DEVICE_RTL8187},
 74         /* Abocom */
 75         {USB_DEVICE(0x13d1, 0xabe6), .driver_info = DEVICE_RTL8187},
 76         /* Qcom */
 77         {USB_DEVICE(0x18E8, 0x6232), .driver_info = DEVICE_RTL8187},
 78         /* AirLive */
 79         {USB_DEVICE(0x1b75, 0x8187), .driver_info = DEVICE_RTL8187},
 80         /* Linksys */
 81         {USB_DEVICE(0x1737, 0x0073), .driver_info = DEVICE_RTL8187B},
 82         {}
 83 };
 84 
 85 MODULE_DEVICE_TABLE(usb, rtl8187_table);
 86 
 87 static const struct ieee80211_rate rtl818x_rates[] = {
 88         { .bitrate = 10, .hw_value = 0, },
 89         { .bitrate = 20, .hw_value = 1, },
 90         { .bitrate = 55, .hw_value = 2, },
 91         { .bitrate = 110, .hw_value = 3, },
 92         { .bitrate = 60, .hw_value = 4, },
 93         { .bitrate = 90, .hw_value = 5, },
 94         { .bitrate = 120, .hw_value = 6, },
 95         { .bitrate = 180, .hw_value = 7, },
 96         { .bitrate = 240, .hw_value = 8, },
 97         { .bitrate = 360, .hw_value = 9, },
 98         { .bitrate = 480, .hw_value = 10, },
 99         { .bitrate = 540, .hw_value = 11, },
100 };
101 
102 static const struct ieee80211_channel rtl818x_channels[] = {
103         { .center_freq = 2412 },
104         { .center_freq = 2417 },
105         { .center_freq = 2422 },
106         { .center_freq = 2427 },
107         { .center_freq = 2432 },
108         { .center_freq = 2437 },
109         { .center_freq = 2442 },
110         { .center_freq = 2447 },
111         { .center_freq = 2452 },
112         { .center_freq = 2457 },
113         { .center_freq = 2462 },
114         { .center_freq = 2467 },
115         { .center_freq = 2472 },
116         { .center_freq = 2484 },
117 };
118 
119 static void rtl8187_iowrite_async_cb(struct urb *urb)
120 {
121         kfree(urb->context);
122 }
123 
124 static void rtl8187_iowrite_async(struct rtl8187_priv *priv, __le16 addr,
125                                   void *data, u16 len)
126 {
127         struct usb_ctrlrequest *dr;
128         struct urb *urb;
129         struct rtl8187_async_write_data {
130                 u8 data[4];
131                 struct usb_ctrlrequest dr;
132         } *buf;
133         int rc;
134 
135         buf = kmalloc(sizeof(*buf), GFP_ATOMIC);
136         if (!buf)
137                 return;
138 
139         urb = usb_alloc_urb(0, GFP_ATOMIC);
140         if (!urb) {
141                 kfree(buf);
142                 return;
143         }
144 
145         dr = &buf->dr;
146 
147         dr->bRequestType = RTL8187_REQT_WRITE;
148         dr->bRequest = RTL8187_REQ_SET_REG;
149         dr->wValue = addr;
150         dr->wIndex = 0;
151         dr->wLength = cpu_to_le16(len);
152 
153         memcpy(buf, data, len);
154 
155         usb_fill_control_urb(urb, priv->udev, usb_sndctrlpipe(priv->udev, 0),
156                              (unsigned char *)dr, buf, len,
157                              rtl8187_iowrite_async_cb, buf);
158         usb_anchor_urb(urb, &priv->anchored);
159         rc = usb_submit_urb(urb, GFP_ATOMIC);
160         if (rc < 0) {
161                 kfree(buf);
162                 usb_unanchor_urb(urb);
163         }
164         usb_free_urb(urb);
165 }
166 
167 static inline void rtl818x_iowrite32_async(struct rtl8187_priv *priv,
168                                            __le32 *addr, u32 val)
169 {
170         __le32 buf = cpu_to_le32(val);
171 
172         rtl8187_iowrite_async(priv, cpu_to_le16((unsigned long)addr),
173                               &buf, sizeof(buf));
174 }
175 
176 void rtl8187_write_phy(struct ieee80211_hw *dev, u8 addr, u32 data)
177 {
178         struct rtl8187_priv *priv = dev->priv;
179 
180         data <<= 8;
181         data |= addr | 0x80;
182 
183         rtl818x_iowrite8(priv, &priv->map->PHY[3], (data >> 24) & 0xFF);
184         rtl818x_iowrite8(priv, &priv->map->PHY[2], (data >> 16) & 0xFF);
185         rtl818x_iowrite8(priv, &priv->map->PHY[1], (data >> 8) & 0xFF);
186         rtl818x_iowrite8(priv, &priv->map->PHY[0], data & 0xFF);
187 }
188 
189 static void rtl8187_tx_cb(struct urb *urb)
190 {
191         struct sk_buff *skb = (struct sk_buff *)urb->context;
192         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
193         struct ieee80211_hw *hw = info->rate_driver_data[0];
194         struct rtl8187_priv *priv = hw->priv;
195 
196         skb_pull(skb, priv->is_rtl8187b ? sizeof(struct rtl8187b_tx_hdr) :
197                                           sizeof(struct rtl8187_tx_hdr));
198         ieee80211_tx_info_clear_status(info);
199 
200         if (!(urb->status) && !(info->flags & IEEE80211_TX_CTL_NO_ACK)) {
201                 if (priv->is_rtl8187b) {
202                         skb_queue_tail(&priv->b_tx_status.queue, skb);
203 
204                         /* queue is "full", discard last items */
205                         while (skb_queue_len(&priv->b_tx_status.queue) > 5) {
206                                 struct sk_buff *old_skb;
207 
208                                 dev_dbg(&priv->udev->dev,
209                                         "transmit status queue full\n");
210 
211                                 old_skb = skb_dequeue(&priv->b_tx_status.queue);
212                                 ieee80211_tx_status_irqsafe(hw, old_skb);
213                         }
214                         return;
215                 } else {
216                         info->flags |= IEEE80211_TX_STAT_ACK;
217                 }
218         }
219         if (priv->is_rtl8187b)
220                 ieee80211_tx_status_irqsafe(hw, skb);
221         else {
222                 /* Retry information for the RTI8187 is only available by
223                  * reading a register in the device. We are in interrupt mode
224                  * here, thus queue the skb and finish on a work queue. */
225                 skb_queue_tail(&priv->b_tx_status.queue, skb);
226                 ieee80211_queue_delayed_work(hw, &priv->work, 0);
227         }
228 }
229 
230 static void rtl8187_tx(struct ieee80211_hw *dev,
231                        struct ieee80211_tx_control *control,
232                        struct sk_buff *skb)
233 {
234         struct rtl8187_priv *priv = dev->priv;
235         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
236         struct ieee80211_hdr *tx_hdr =  (struct ieee80211_hdr *)(skb->data);
237         unsigned int ep;
238         void *buf;
239         struct urb *urb;
240         __le16 rts_dur = 0;
241         u32 flags;
242         int rc;
243 
244         urb = usb_alloc_urb(0, GFP_ATOMIC);
245         if (!urb) {
246                 kfree_skb(skb);
247                 return;
248         }
249 
250         flags = skb->len;
251         flags |= RTL818X_TX_DESC_FLAG_NO_ENC;
252 
253         flags |= ieee80211_get_tx_rate(dev, info)->hw_value << 24;
254         if (ieee80211_has_morefrags(tx_hdr->frame_control))
255                 flags |= RTL818X_TX_DESC_FLAG_MOREFRAG;
256 
257         /* HW will perform RTS-CTS when only RTS flags is set.
258          * HW will perform CTS-to-self when both RTS and CTS flags are set.
259          * RTS rate and RTS duration will be used also for CTS-to-self.
260          */
261         if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_RTS_CTS) {
262                 flags |= RTL818X_TX_DESC_FLAG_RTS;
263                 flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
264                 rts_dur = ieee80211_rts_duration(dev, priv->vif,
265                                                  skb->len, info);
266         } else if (info->control.rates[0].flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
267                 flags |= RTL818X_TX_DESC_FLAG_RTS | RTL818X_TX_DESC_FLAG_CTS;
268                 flags |= ieee80211_get_rts_cts_rate(dev, info)->hw_value << 19;
269                 rts_dur = ieee80211_ctstoself_duration(dev, priv->vif,
270                                                  skb->len, info);
271         }
272 
273         if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) {
274                 if (info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT)
275                         priv->seqno += 0x10;
276                 tx_hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG);
277                 tx_hdr->seq_ctrl |= cpu_to_le16(priv->seqno);
278         }
279 
280         if (!priv->is_rtl8187b) {
281                 struct rtl8187_tx_hdr *hdr =
282                         (struct rtl8187_tx_hdr *)skb_push(skb, sizeof(*hdr));
283                 hdr->flags = cpu_to_le32(flags);
284                 hdr->len = 0;
285                 hdr->rts_duration = rts_dur;
286                 hdr->retry = cpu_to_le32((info->control.rates[0].count - 1) << 8);
287                 buf = hdr;
288 
289                 ep = 2;
290         } else {
291                 /* fc needs to be calculated before skb_push() */
292                 unsigned int epmap[4] = { 6, 7, 5, 4 };
293                 u16 fc = le16_to_cpu(tx_hdr->frame_control);
294 
295                 struct rtl8187b_tx_hdr *hdr =
296                         (struct rtl8187b_tx_hdr *)skb_push(skb, sizeof(*hdr));
297                 struct ieee80211_rate *txrate =
298                         ieee80211_get_tx_rate(dev, info);
299                 memset(hdr, 0, sizeof(*hdr));
300                 hdr->flags = cpu_to_le32(flags);
301                 hdr->rts_duration = rts_dur;
302                 hdr->retry = cpu_to_le32((info->control.rates[0].count - 1) << 8);
303                 hdr->tx_duration =
304                         ieee80211_generic_frame_duration(dev, priv->vif,
305                                                          info->band,
306                                                          skb->len, txrate);
307                 buf = hdr;
308 
309                 if ((fc & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT)
310                         ep = 12;
311                 else
312                         ep = epmap[skb_get_queue_mapping(skb)];
313         }
314 
315         info->rate_driver_data[0] = dev;
316         info->rate_driver_data[1] = urb;
317 
318         usb_fill_bulk_urb(urb, priv->udev, usb_sndbulkpipe(priv->udev, ep),
319                           buf, skb->len, rtl8187_tx_cb, skb);
320         urb->transfer_flags |= URB_ZERO_PACKET;
321         usb_anchor_urb(urb, &priv->anchored);
322         rc = usb_submit_urb(urb, GFP_ATOMIC);
323         if (rc < 0) {
324                 usb_unanchor_urb(urb);
325                 kfree_skb(skb);
326         }
327         usb_free_urb(urb);
328 }
329 
330 static void rtl8187_rx_cb(struct urb *urb)
331 {
332         struct sk_buff *skb = (struct sk_buff *)urb->context;
333         struct rtl8187_rx_info *info = (struct rtl8187_rx_info *)skb->cb;
334         struct ieee80211_hw *dev = info->dev;
335         struct rtl8187_priv *priv = dev->priv;
336         struct ieee80211_rx_status rx_status = { 0 };
337         int rate, signal;
338         u32 flags;
339         unsigned long f;
340 
341         spin_lock_irqsave(&priv->rx_queue.lock, f);
342         __skb_unlink(skb, &priv->rx_queue);
343         spin_unlock_irqrestore(&priv->rx_queue.lock, f);
344         skb_put(skb, urb->actual_length);
345 
346         if (unlikely(urb->status)) {
347                 dev_kfree_skb_irq(skb);
348                 return;
349         }
350 
351         if (!priv->is_rtl8187b) {
352                 struct rtl8187_rx_hdr *hdr =
353                         (typeof(hdr))(skb_tail_pointer(skb) - sizeof(*hdr));
354                 flags = le32_to_cpu(hdr->flags);
355                 /* As with the RTL8187B below, the AGC is used to calculate
356                  * signal strength. In this case, the scaling
357                  * constants are derived from the output of p54usb.
358                  */
359                 signal = -4 - ((27 * hdr->agc) >> 6);
360                 rx_status.antenna = (hdr->signal >> 7) & 1;
361                 rx_status.mactime = le64_to_cpu(hdr->mac_time);
362         } else {
363                 struct rtl8187b_rx_hdr *hdr =
364                         (typeof(hdr))(skb_tail_pointer(skb) - sizeof(*hdr));
365                 /* The Realtek datasheet for the RTL8187B shows that the RX
366                  * header contains the following quantities: signal quality,
367                  * RSSI, AGC, the received power in dB, and the measured SNR.
368                  * In testing, none of these quantities show qualitative
369                  * agreement with AP signal strength, except for the AGC,
370                  * which is inversely proportional to the strength of the
371                  * signal. In the following, the signal strength
372                  * is derived from the AGC. The arbitrary scaling constants
373                  * are chosen to make the results close to the values obtained
374                  * for a BCM4312 using b43 as the driver. The noise is ignored
375                  * for now.
376                  */
377                 flags = le32_to_cpu(hdr->flags);
378                 signal = 14 - hdr->agc / 2;
379                 rx_status.antenna = (hdr->rssi >> 7) & 1;
380                 rx_status.mactime = le64_to_cpu(hdr->mac_time);
381         }
382 
383         rx_status.signal = signal;
384         priv->signal = signal;
385         rate = (flags >> 20) & 0xF;
386         skb_trim(skb, flags & 0x0FFF);
387         rx_status.rate_idx = rate;
388         rx_status.freq = dev->conf.chandef.chan->center_freq;
389         rx_status.band = dev->conf.chandef.chan->band;
390         rx_status.flag |= RX_FLAG_MACTIME_START;
391         if (flags & RTL818X_RX_DESC_FLAG_SPLCP)
392                 rx_status.flag |= RX_FLAG_SHORTPRE;
393         if (flags & RTL818X_RX_DESC_FLAG_CRC32_ERR)
394                 rx_status.flag |= RX_FLAG_FAILED_FCS_CRC;
395         memcpy(IEEE80211_SKB_RXCB(skb), &rx_status, sizeof(rx_status));
396         ieee80211_rx_irqsafe(dev, skb);
397 
398         skb = dev_alloc_skb(RTL8187_MAX_RX);
399         if (unlikely(!skb)) {
400                 /* TODO check rx queue length and refill *somewhere* */
401                 return;
402         }
403 
404         info = (struct rtl8187_rx_info *)skb->cb;
405         info->urb = urb;
406         info->dev = dev;
407         urb->transfer_buffer = skb_tail_pointer(skb);
408         urb->context = skb;
409         skb_queue_tail(&priv->rx_queue, skb);
410 
411         usb_anchor_urb(urb, &priv->anchored);
412         if (usb_submit_urb(urb, GFP_ATOMIC)) {
413                 usb_unanchor_urb(urb);
414                 skb_unlink(skb, &priv->rx_queue);
415                 dev_kfree_skb_irq(skb);
416         }
417 }
418 
419 static int rtl8187_init_urbs(struct ieee80211_hw *dev)
420 {
421         struct rtl8187_priv *priv = dev->priv;
422         struct urb *entry = NULL;
423         struct sk_buff *skb;
424         struct rtl8187_rx_info *info;
425         int ret = 0;
426 
427         while (skb_queue_len(&priv->rx_queue) < 32) {
428                 skb = __dev_alloc_skb(RTL8187_MAX_RX, GFP_KERNEL);
429                 if (!skb) {
430                         ret = -ENOMEM;
431                         goto err;
432                 }
433                 entry = usb_alloc_urb(0, GFP_KERNEL);
434                 if (!entry) {
435                         ret = -ENOMEM;
436                         goto err;
437                 }
438                 usb_fill_bulk_urb(entry, priv->udev,
439                                   usb_rcvbulkpipe(priv->udev,
440                                   priv->is_rtl8187b ? 3 : 1),
441                                   skb_tail_pointer(skb),
442                                   RTL8187_MAX_RX, rtl8187_rx_cb, skb);
443                 info = (struct rtl8187_rx_info *)skb->cb;
444                 info->urb = entry;
445                 info->dev = dev;
446                 skb_queue_tail(&priv->rx_queue, skb);
447                 usb_anchor_urb(entry, &priv->anchored);
448                 ret = usb_submit_urb(entry, GFP_KERNEL);
449                 usb_put_urb(entry);
450                 if (ret) {
451                         skb_unlink(skb, &priv->rx_queue);
452                         usb_unanchor_urb(entry);
453                         goto err;
454                 }
455         }
456         return ret;
457 
458 err:
459         kfree_skb(skb);
460         usb_kill_anchored_urbs(&priv->anchored);
461         return ret;
462 }
463 
464 static void rtl8187b_status_cb(struct urb *urb)
465 {
466         struct ieee80211_hw *hw = (struct ieee80211_hw *)urb->context;
467         struct rtl8187_priv *priv = hw->priv;
468         u64 val;
469         unsigned int cmd_type;
470 
471         if (unlikely(urb->status))
472                 return;
473 
474         /*
475          * Read from status buffer:
476          *
477          * bits [30:31] = cmd type:
478          * - 0 indicates tx beacon interrupt
479          * - 1 indicates tx close descriptor
480          *
481          * In the case of tx beacon interrupt:
482          * [0:9] = Last Beacon CW
483          * [10:29] = reserved
484          * [30:31] = 00b
485          * [32:63] = Last Beacon TSF
486          *
487          * If it's tx close descriptor:
488          * [0:7] = Packet Retry Count
489          * [8:14] = RTS Retry Count
490          * [15] = TOK
491          * [16:27] = Sequence No
492          * [28] = LS
493          * [29] = FS
494          * [30:31] = 01b
495          * [32:47] = unused (reserved?)
496          * [48:63] = MAC Used Time
497          */
498         val = le64_to_cpu(priv->b_tx_status.buf);
499 
500         cmd_type = (val >> 30) & 0x3;
501         if (cmd_type == 1) {
502                 unsigned int pkt_rc, seq_no;
503                 bool tok;
504                 struct sk_buff *skb;
505                 struct ieee80211_hdr *ieee80211hdr;
506                 unsigned long flags;
507 
508                 pkt_rc = val & 0xFF;
509                 tok = val & (1 << 15);
510                 seq_no = (val >> 16) & 0xFFF;
511 
512                 spin_lock_irqsave(&priv->b_tx_status.queue.lock, flags);
513                 skb_queue_reverse_walk(&priv->b_tx_status.queue, skb) {
514                         ieee80211hdr = (struct ieee80211_hdr *)skb->data;
515 
516                         /*
517                          * While testing, it was discovered that the seq_no
518                          * doesn't actually contains the sequence number.
519                          * Instead of returning just the 12 bits of sequence
520                          * number, hardware is returning entire sequence control
521                          * (fragment number plus sequence number) in a 12 bit
522                          * only field overflowing after some time. As a
523                          * workaround, just consider the lower bits, and expect
524                          * it's unlikely we wrongly ack some sent data
525                          */
526                         if ((le16_to_cpu(ieee80211hdr->seq_ctrl)
527                             & 0xFFF) == seq_no)
528                                 break;
529                 }
530                 if (skb != (struct sk_buff *) &priv->b_tx_status.queue) {
531                         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
532 
533                         __skb_unlink(skb, &priv->b_tx_status.queue);
534                         if (tok)
535                                 info->flags |= IEEE80211_TX_STAT_ACK;
536                         info->status.rates[0].count = pkt_rc + 1;
537 
538                         ieee80211_tx_status_irqsafe(hw, skb);
539                 }
540                 spin_unlock_irqrestore(&priv->b_tx_status.queue.lock, flags);
541         }
542 
543         usb_anchor_urb(urb, &priv->anchored);
544         if (usb_submit_urb(urb, GFP_ATOMIC))
545                 usb_unanchor_urb(urb);
546 }
547 
548 static int rtl8187b_init_status_urb(struct ieee80211_hw *dev)
549 {
550         struct rtl8187_priv *priv = dev->priv;
551         struct urb *entry;
552         int ret = 0;
553 
554         entry = usb_alloc_urb(0, GFP_KERNEL);
555         if (!entry)
556                 return -ENOMEM;
557 
558         usb_fill_bulk_urb(entry, priv->udev, usb_rcvbulkpipe(priv->udev, 9),
559                           &priv->b_tx_status.buf, sizeof(priv->b_tx_status.buf),
560                           rtl8187b_status_cb, dev);
561 
562         usb_anchor_urb(entry, &priv->anchored);
563         ret = usb_submit_urb(entry, GFP_KERNEL);
564         if (ret)
565                 usb_unanchor_urb(entry);
566         usb_free_urb(entry);
567 
568         return ret;
569 }
570 
571 static void rtl8187_set_anaparam(struct rtl8187_priv *priv, bool rfon)
572 {
573         u32 anaparam, anaparam2;
574         u8 anaparam3, reg;
575 
576         if (!priv->is_rtl8187b) {
577                 if (rfon) {
578                         anaparam = RTL8187_RTL8225_ANAPARAM_ON;
579                         anaparam2 = RTL8187_RTL8225_ANAPARAM2_ON;
580                 } else {
581                         anaparam = RTL8187_RTL8225_ANAPARAM_OFF;
582                         anaparam2 = RTL8187_RTL8225_ANAPARAM2_OFF;
583                 }
584         } else {
585                 if (rfon) {
586                         anaparam = RTL8187B_RTL8225_ANAPARAM_ON;
587                         anaparam2 = RTL8187B_RTL8225_ANAPARAM2_ON;
588                         anaparam3 = RTL8187B_RTL8225_ANAPARAM3_ON;
589                 } else {
590                         anaparam = RTL8187B_RTL8225_ANAPARAM_OFF;
591                         anaparam2 = RTL8187B_RTL8225_ANAPARAM2_OFF;
592                         anaparam3 = RTL8187B_RTL8225_ANAPARAM3_OFF;
593                 }
594         }
595 
596         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
597                          RTL818X_EEPROM_CMD_CONFIG);
598         reg = rtl818x_ioread8(priv, &priv->map->CONFIG3);
599         reg |= RTL818X_CONFIG3_ANAPARAM_WRITE;
600         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
601         rtl818x_iowrite32(priv, &priv->map->ANAPARAM, anaparam);
602         rtl818x_iowrite32(priv, &priv->map->ANAPARAM2, anaparam2);
603         if (priv->is_rtl8187b)
604                 rtl818x_iowrite8(priv, &priv->map->ANAPARAM3A, anaparam3);
605         reg &= ~RTL818X_CONFIG3_ANAPARAM_WRITE;
606         rtl818x_iowrite8(priv, &priv->map->CONFIG3, reg);
607         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
608                          RTL818X_EEPROM_CMD_NORMAL);
609 }
610 
611 static int rtl8187_cmd_reset(struct ieee80211_hw *dev)
612 {
613         struct rtl8187_priv *priv = dev->priv;
614         u8 reg;
615         int i;
616 
617         reg = rtl818x_ioread8(priv, &priv->map->CMD);
618         reg &= (1 << 1);
619         reg |= RTL818X_CMD_RESET;
620         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
621 
622         i = 10;
623         do {
624                 msleep(2);
625                 if (!(rtl818x_ioread8(priv, &priv->map->CMD) &
626                       RTL818X_CMD_RESET))
627                         break;
628         } while (--i);
629 
630         if (!i) {
631                 wiphy_err(dev->wiphy, "Reset timeout!\n");
632                 return -ETIMEDOUT;
633         }
634 
635         /* reload registers from eeprom */
636         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_LOAD);
637 
638         i = 10;
639         do {
640                 msleep(4);
641                 if (!(rtl818x_ioread8(priv, &priv->map->EEPROM_CMD) &
642                       RTL818X_EEPROM_CMD_CONFIG))
643                         break;
644         } while (--i);
645 
646         if (!i) {
647                 wiphy_err(dev->wiphy, "eeprom reset timeout!\n");
648                 return -ETIMEDOUT;
649         }
650 
651         return 0;
652 }
653 
654 static int rtl8187_init_hw(struct ieee80211_hw *dev)
655 {
656         struct rtl8187_priv *priv = dev->priv;
657         u8 reg;
658         int res;
659 
660         /* reset */
661         rtl8187_set_anaparam(priv, true);
662 
663         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
664 
665         msleep(200);
666         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x10);
667         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x11);
668         rtl818x_iowrite8(priv, (u8 *)0xFE18, 0x00);
669         msleep(200);
670 
671         res = rtl8187_cmd_reset(dev);
672         if (res)
673                 return res;
674 
675         rtl8187_set_anaparam(priv, true);
676 
677         /* setup card */
678         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
679         rtl818x_iowrite8(priv, &priv->map->GPIO0, 0);
680 
681         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
682         rtl818x_iowrite8(priv, &priv->map->GPIO0, 1);
683         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
684 
685         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
686 
687         rtl818x_iowrite16(priv, (__le16 *)0xFFF4, 0xFFFF);
688         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
689         reg &= 0x3F;
690         reg |= 0x80;
691         rtl818x_iowrite8(priv, &priv->map->CONFIG1, reg);
692 
693         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
694 
695         rtl818x_iowrite32(priv, &priv->map->INT_TIMEOUT, 0);
696         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
697         rtl818x_iowrite8(priv, &priv->map->RATE_FALLBACK, 0);
698 
699         // TODO: set RESP_RATE and BRSR properly
700         rtl818x_iowrite8(priv, &priv->map->RESP_RATE, (8 << 4) | 0);
701         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
702 
703         /* host_usb_init */
704         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0);
705         rtl818x_iowrite8(priv, &priv->map->GPIO0, 0);
706         reg = rtl818x_ioread8(priv, (u8 *)0xFE53);
707         rtl818x_iowrite8(priv, (u8 *)0xFE53, reg | (1 << 7));
708         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, (4 << 8));
709         rtl818x_iowrite8(priv, &priv->map->GPIO0, 0x20);
710         rtl818x_iowrite8(priv, &priv->map->GP_ENABLE, 0);
711         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x80);
712         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x80);
713         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x80);
714         msleep(100);
715 
716         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x000a8008);
717         rtl818x_iowrite16(priv, &priv->map->BRSR, 0xFFFF);
718         rtl818x_iowrite32(priv, &priv->map->RF_PARA, 0x00100044);
719         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
720                          RTL818X_EEPROM_CMD_CONFIG);
721         rtl818x_iowrite8(priv, &priv->map->CONFIG3, 0x44);
722         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
723                          RTL818X_EEPROM_CMD_NORMAL);
724         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FF7);
725         msleep(100);
726 
727         priv->rf->init(dev);
728 
729         rtl818x_iowrite16(priv, &priv->map->BRSR, 0x01F3);
730         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
731         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
732         rtl818x_iowrite16(priv, (__le16 *)0xFFFE, 0x10);
733         rtl818x_iowrite8(priv, &priv->map->TALLY_SEL, 0x80);
734         rtl818x_iowrite8(priv, (u8 *)0xFFFF, 0x60);
735         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
736 
737         return 0;
738 }
739 
740 static const u8 rtl8187b_reg_table[][3] = {
741         {0xF0, 0x32, 0}, {0xF1, 0x32, 0}, {0xF2, 0x00, 0}, {0xF3, 0x00, 0},
742         {0xF4, 0x32, 0}, {0xF5, 0x43, 0}, {0xF6, 0x00, 0}, {0xF7, 0x00, 0},
743         {0xF8, 0x46, 0}, {0xF9, 0xA4, 0}, {0xFA, 0x00, 0}, {0xFB, 0x00, 0},
744         {0xFC, 0x96, 0}, {0xFD, 0xA4, 0}, {0xFE, 0x00, 0}, {0xFF, 0x00, 0},
745 
746         {0x58, 0x4B, 1}, {0x59, 0x00, 1}, {0x5A, 0x4B, 1}, {0x5B, 0x00, 1},
747         {0x60, 0x4B, 1}, {0x61, 0x09, 1}, {0x62, 0x4B, 1}, {0x63, 0x09, 1},
748         {0xCE, 0x0F, 1}, {0xCF, 0x00, 1}, {0xF0, 0x4E, 1}, {0xF1, 0x01, 1},
749         {0xF2, 0x02, 1}, {0xF3, 0x03, 1}, {0xF4, 0x04, 1}, {0xF5, 0x05, 1},
750         {0xF6, 0x06, 1}, {0xF7, 0x07, 1}, {0xF8, 0x08, 1},
751 
752         {0x4E, 0x00, 2}, {0x0C, 0x04, 2}, {0x21, 0x61, 2}, {0x22, 0x68, 2},
753         {0x23, 0x6F, 2}, {0x24, 0x76, 2}, {0x25, 0x7D, 2}, {0x26, 0x84, 2},
754         {0x27, 0x8D, 2}, {0x4D, 0x08, 2}, {0x50, 0x05, 2}, {0x51, 0xF5, 2},
755         {0x52, 0x04, 2}, {0x53, 0xA0, 2}, {0x54, 0x1F, 2}, {0x55, 0x23, 2},
756         {0x56, 0x45, 2}, {0x57, 0x67, 2}, {0x58, 0x08, 2}, {0x59, 0x08, 2},
757         {0x5A, 0x08, 2}, {0x5B, 0x08, 2}, {0x60, 0x08, 2}, {0x61, 0x08, 2},
758         {0x62, 0x08, 2}, {0x63, 0x08, 2}, {0x64, 0xCF, 2},
759 
760         {0x5B, 0x40, 0}, {0x84, 0x88, 0}, {0x85, 0x24, 0}, {0x88, 0x54, 0},
761         {0x8B, 0xB8, 0}, {0x8C, 0x07, 0}, {0x8D, 0x00, 0}, {0x94, 0x1B, 0},
762         {0x95, 0x12, 0}, {0x96, 0x00, 0}, {0x97, 0x06, 0}, {0x9D, 0x1A, 0},
763         {0x9F, 0x10, 0}, {0xB4, 0x22, 0}, {0xBE, 0x80, 0}, {0xDB, 0x00, 0},
764         {0xEE, 0x00, 0}, {0x4C, 0x00, 2},
765 
766         {0x9F, 0x00, 3}, {0x8C, 0x01, 0}, {0x8D, 0x10, 0}, {0x8E, 0x08, 0},
767         {0x8F, 0x00, 0}
768 };
769 
770 static int rtl8187b_init_hw(struct ieee80211_hw *dev)
771 {
772         struct rtl8187_priv *priv = dev->priv;
773         int res, i;
774         u8 reg;
775 
776         rtl8187_set_anaparam(priv, true);
777 
778         /* Reset PLL sequence on 8187B. Realtek note: reduces power
779          * consumption about 30 mA */
780         rtl818x_iowrite8(priv, (u8 *)0xFF61, 0x10);
781         reg = rtl818x_ioread8(priv, (u8 *)0xFF62);
782         rtl818x_iowrite8(priv, (u8 *)0xFF62, reg & ~(1 << 5));
783         rtl818x_iowrite8(priv, (u8 *)0xFF62, reg | (1 << 5));
784 
785         res = rtl8187_cmd_reset(dev);
786         if (res)
787                 return res;
788 
789         rtl8187_set_anaparam(priv, true);
790 
791         /* BRSR (Basic Rate Set Register) on 8187B looks to be the same as
792          * RESP_RATE on 8187L in Realtek sources: each bit should be each
793          * one of the 12 rates, all are enabled */
794         rtl818x_iowrite16(priv, (__le16 *)0xFF34, 0x0FFF);
795 
796         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
797         reg |= RTL818X_CW_CONF_PERPACKET_RETRY;
798         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
799 
800         /* Auto Rate Fallback Register (ARFR): 1M-54M setting */
801         rtl818x_iowrite16_idx(priv, (__le16 *)0xFFE0, 0x0FFF, 1);
802         rtl818x_iowrite8_idx(priv, (u8 *)0xFFE2, 0x00, 1);
803 
804         rtl818x_iowrite16_idx(priv, (__le16 *)0xFFD4, 0xFFFF, 1);
805 
806         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
807                          RTL818X_EEPROM_CMD_CONFIG);
808         reg = rtl818x_ioread8(priv, &priv->map->CONFIG1);
809         rtl818x_iowrite8(priv, &priv->map->CONFIG1, (reg & 0x3F) | 0x80);
810         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD,
811                          RTL818X_EEPROM_CMD_NORMAL);
812 
813         rtl818x_iowrite8(priv, &priv->map->WPA_CONF, 0);
814         for (i = 0; i < ARRAY_SIZE(rtl8187b_reg_table); i++) {
815                 rtl818x_iowrite8_idx(priv,
816                                      (u8 *)(uintptr_t)
817                                      (rtl8187b_reg_table[i][0] | 0xFF00),
818                                      rtl8187b_reg_table[i][1],
819                                      rtl8187b_reg_table[i][2]);
820         }
821 
822         rtl818x_iowrite16(priv, &priv->map->TID_AC_MAP, 0xFA50);
823         rtl818x_iowrite16(priv, &priv->map->INT_MIG, 0);
824 
825         rtl818x_iowrite32_idx(priv, (__le32 *)0xFFF0, 0, 1);
826         rtl818x_iowrite32_idx(priv, (__le32 *)0xFFF4, 0, 1);
827         rtl818x_iowrite8_idx(priv, (u8 *)0xFFF8, 0, 1);
828 
829         rtl818x_iowrite32(priv, &priv->map->RF_TIMING, 0x00004001);
830 
831         /* RFSW_CTRL register */
832         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF72, 0x569A, 2);
833 
834         rtl818x_iowrite16(priv, &priv->map->RFPinsOutput, 0x0480);
835         rtl818x_iowrite16(priv, &priv->map->RFPinsSelect, 0x2488);
836         rtl818x_iowrite16(priv, &priv->map->RFPinsEnable, 0x1FFF);
837         msleep(100);
838 
839         priv->rf->init(dev);
840 
841         reg = RTL818X_CMD_TX_ENABLE | RTL818X_CMD_RX_ENABLE;
842         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
843         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
844 
845         rtl818x_iowrite8(priv, (u8 *)0xFE41, 0xF4);
846         rtl818x_iowrite8(priv, (u8 *)0xFE40, 0x00);
847         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x00);
848         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x01);
849         rtl818x_iowrite8(priv, (u8 *)0xFE40, 0x0F);
850         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x00);
851         rtl818x_iowrite8(priv, (u8 *)0xFE42, 0x01);
852 
853         reg = rtl818x_ioread8(priv, (u8 *)0xFFDB);
854         rtl818x_iowrite8(priv, (u8 *)0xFFDB, reg | (1 << 2));
855         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF72, 0x59FA, 3);
856         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF74, 0x59D2, 3);
857         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF76, 0x59D2, 3);
858         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF78, 0x19FA, 3);
859         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF7A, 0x19FA, 3);
860         rtl818x_iowrite16_idx(priv, (__le16 *)0xFF7C, 0x00D0, 3);
861         rtl818x_iowrite8(priv, (u8 *)0xFF61, 0);
862         rtl818x_iowrite8_idx(priv, (u8 *)0xFF80, 0x0F, 1);
863         rtl818x_iowrite8_idx(priv, (u8 *)0xFF83, 0x03, 1);
864         rtl818x_iowrite8(priv, (u8 *)0xFFDA, 0x10);
865         rtl818x_iowrite8_idx(priv, (u8 *)0xFF4D, 0x08, 2);
866 
867         rtl818x_iowrite32(priv, &priv->map->HSSI_PARA, 0x0600321B);
868 
869         rtl818x_iowrite16_idx(priv, (__le16 *)0xFFEC, 0x0800, 1);
870 
871         priv->slot_time = 0x9;
872         priv->aifsn[0] = 2; /* AIFSN[AC_VO] */
873         priv->aifsn[1] = 2; /* AIFSN[AC_VI] */
874         priv->aifsn[2] = 7; /* AIFSN[AC_BK] */
875         priv->aifsn[3] = 3; /* AIFSN[AC_BE] */
876         rtl818x_iowrite8(priv, &priv->map->ACM_CONTROL, 0);
877 
878         /* ENEDCA flag must always be set, transmit issues? */
879         rtl818x_iowrite8(priv, &priv->map->MSR, RTL818X_MSR_ENEDCA);
880 
881         return 0;
882 }
883 
884 static void rtl8187_work(struct work_struct *work)
885 {
886         /* The RTL8187 returns the retry count through register 0xFFFA. In
887          * addition, it appears to be a cumulative retry count, not the
888          * value for the current TX packet. When multiple TX entries are
889          * waiting in the queue, the retry count will be the total for all.
890          * The "error" may matter for purposes of rate setting, but there is
891          * no other choice with this hardware.
892          */
893         struct rtl8187_priv *priv = container_of(work, struct rtl8187_priv,
894                                     work.work);
895         struct ieee80211_tx_info *info;
896         struct ieee80211_hw *dev = priv->dev;
897         static u16 retry;
898         u16 tmp;
899         u16 avg_retry;
900         int length;
901 
902         mutex_lock(&priv->conf_mutex);
903         tmp = rtl818x_ioread16(priv, (__le16 *)0xFFFA);
904         length = skb_queue_len(&priv->b_tx_status.queue);
905         if (unlikely(!length))
906                 length = 1;
907         if (unlikely(tmp < retry))
908                 tmp = retry;
909         avg_retry = (tmp - retry) / length;
910         while (skb_queue_len(&priv->b_tx_status.queue) > 0) {
911                 struct sk_buff *old_skb;
912 
913                 old_skb = skb_dequeue(&priv->b_tx_status.queue);
914                 info = IEEE80211_SKB_CB(old_skb);
915                 info->status.rates[0].count = avg_retry + 1;
916                 if (info->status.rates[0].count > RETRY_COUNT)
917                         info->flags &= ~IEEE80211_TX_STAT_ACK;
918                 ieee80211_tx_status_irqsafe(dev, old_skb);
919         }
920         retry = tmp;
921         mutex_unlock(&priv->conf_mutex);
922 }
923 
924 static int rtl8187_start(struct ieee80211_hw *dev)
925 {
926         struct rtl8187_priv *priv = dev->priv;
927         u32 reg;
928         int ret;
929 
930         mutex_lock(&priv->conf_mutex);
931 
932         ret = (!priv->is_rtl8187b) ? rtl8187_init_hw(dev) :
933                                      rtl8187b_init_hw(dev);
934         if (ret)
935                 goto rtl8187_start_exit;
936 
937         init_usb_anchor(&priv->anchored);
938         priv->dev = dev;
939 
940         if (priv->is_rtl8187b) {
941                 reg = RTL818X_RX_CONF_MGMT |
942                       RTL818X_RX_CONF_DATA |
943                       RTL818X_RX_CONF_BROADCAST |
944                       RTL818X_RX_CONF_NICMAC |
945                       RTL818X_RX_CONF_BSSID |
946                       (7 << 13 /* RX FIFO threshold NONE */) |
947                       (7 << 10 /* MAX RX DMA */) |
948                       RTL818X_RX_CONF_RX_AUTORESETPHY |
949                       RTL818X_RX_CONF_ONLYERLPKT |
950                       RTL818X_RX_CONF_MULTICAST;
951                 priv->rx_conf = reg;
952                 rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
953 
954                 reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
955                 reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN;
956                 reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL;
957                 reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
958                 rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
959 
960                 rtl818x_iowrite32(priv, &priv->map->TX_CONF,
961                                   RTL818X_TX_CONF_HW_SEQNUM |
962                                   RTL818X_TX_CONF_DISREQQSIZE |
963                                   (RETRY_COUNT << 8  /* short retry limit */) |
964                                   (RETRY_COUNT << 0  /* long retry limit */) |
965                                   (7 << 21 /* MAX TX DMA */));
966                 ret = rtl8187_init_urbs(dev);
967                 if (ret)
968                         goto rtl8187_start_exit;
969                 ret = rtl8187b_init_status_urb(dev);
970                 if (ret)
971                         usb_kill_anchored_urbs(&priv->anchored);
972                 goto rtl8187_start_exit;
973         }
974 
975         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0xFFFF);
976 
977         rtl818x_iowrite32(priv, &priv->map->MAR[0], ~0);
978         rtl818x_iowrite32(priv, &priv->map->MAR[1], ~0);
979 
980         ret = rtl8187_init_urbs(dev);
981         if (ret)
982                 goto rtl8187_start_exit;
983 
984         reg = RTL818X_RX_CONF_ONLYERLPKT |
985               RTL818X_RX_CONF_RX_AUTORESETPHY |
986               RTL818X_RX_CONF_BSSID |
987               RTL818X_RX_CONF_MGMT |
988               RTL818X_RX_CONF_DATA |
989               (7 << 13 /* RX FIFO threshold NONE */) |
990               (7 << 10 /* MAX RX DMA */) |
991               RTL818X_RX_CONF_BROADCAST |
992               RTL818X_RX_CONF_NICMAC;
993 
994         priv->rx_conf = reg;
995         rtl818x_iowrite32(priv, &priv->map->RX_CONF, reg);
996 
997         reg = rtl818x_ioread8(priv, &priv->map->CW_CONF);
998         reg &= ~RTL818X_CW_CONF_PERPACKET_CW;
999         reg |= RTL818X_CW_CONF_PERPACKET_RETRY;
1000         rtl818x_iowrite8(priv, &priv->map->CW_CONF, reg);
1001 
1002         reg = rtl818x_ioread8(priv, &priv->map->TX_AGC_CTL);
1003         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_GAIN;
1004         reg &= ~RTL818X_TX_AGC_CTL_PERPACKET_ANTSEL;
1005         reg &= ~RTL818X_TX_AGC_CTL_FEEDBACK_ANT;
1006         rtl818x_iowrite8(priv, &priv->map->TX_AGC_CTL, reg);
1007 
1008         reg  = RTL818X_TX_CONF_CW_MIN |
1009                (7 << 21 /* MAX TX DMA */) |
1010                RTL818X_TX_CONF_NO_ICV;
1011         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
1012 
1013         reg = rtl818x_ioread8(priv, &priv->map->CMD);
1014         reg |= RTL818X_CMD_TX_ENABLE;
1015         reg |= RTL818X_CMD_RX_ENABLE;
1016         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
1017         INIT_DELAYED_WORK(&priv->work, rtl8187_work);
1018 
1019 rtl8187_start_exit:
1020         mutex_unlock(&priv->conf_mutex);
1021         return ret;
1022 }
1023 
1024 static void rtl8187_stop(struct ieee80211_hw *dev)
1025 {
1026         struct rtl8187_priv *priv = dev->priv;
1027         struct sk_buff *skb;
1028         u32 reg;
1029 
1030         mutex_lock(&priv->conf_mutex);
1031         rtl818x_iowrite16(priv, &priv->map->INT_MASK, 0);
1032 
1033         reg = rtl818x_ioread8(priv, &priv->map->CMD);
1034         reg &= ~RTL818X_CMD_TX_ENABLE;
1035         reg &= ~RTL818X_CMD_RX_ENABLE;
1036         rtl818x_iowrite8(priv, &priv->map->CMD, reg);
1037 
1038         priv->rf->stop(dev);
1039         rtl8187_set_anaparam(priv, false);
1040 
1041         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
1042         reg = rtl818x_ioread8(priv, &priv->map->CONFIG4);
1043         rtl818x_iowrite8(priv, &priv->map->CONFIG4, reg | RTL818X_CONFIG4_VCOOFF);
1044         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
1045 
1046         while ((skb = skb_dequeue(&priv->b_tx_status.queue)))
1047                 dev_kfree_skb_any(skb);
1048 
1049         usb_kill_anchored_urbs(&priv->anchored);
1050         mutex_unlock(&priv->conf_mutex);
1051 
1052         if (!priv->is_rtl8187b)
1053                 cancel_delayed_work_sync(&priv->work);
1054 }
1055 
1056 static u64 rtl8187_get_tsf(struct ieee80211_hw *dev, struct ieee80211_vif *vif)
1057 {
1058         struct rtl8187_priv *priv = dev->priv;
1059 
1060         return rtl818x_ioread32(priv, &priv->map->TSFT[0]) |
1061                (u64)(rtl818x_ioread32(priv, &priv->map->TSFT[1])) << 32;
1062 }
1063 
1064 
1065 static void rtl8187_beacon_work(struct work_struct *work)
1066 {
1067         struct rtl8187_vif *vif_priv =
1068                 container_of(work, struct rtl8187_vif, beacon_work.work);
1069         struct ieee80211_vif *vif =
1070                 container_of((void *)vif_priv, struct ieee80211_vif, drv_priv);
1071         struct ieee80211_hw *dev = vif_priv->dev;
1072         struct ieee80211_mgmt *mgmt;
1073         struct sk_buff *skb;
1074 
1075         /* don't overflow the tx ring */
1076         if (ieee80211_queue_stopped(dev, 0))
1077                 goto resched;
1078 
1079         /* grab a fresh beacon */
1080         skb = ieee80211_beacon_get(dev, vif);
1081         if (!skb)
1082                 goto resched;
1083 
1084         /*
1085          * update beacon timestamp w/ TSF value
1086          * TODO: make hardware update beacon timestamp
1087          */
1088         mgmt = (struct ieee80211_mgmt *)skb->data;
1089         mgmt->u.beacon.timestamp = cpu_to_le64(rtl8187_get_tsf(dev, vif));
1090 
1091         /* TODO: use actual beacon queue */
1092         skb_set_queue_mapping(skb, 0);
1093 
1094         rtl8187_tx(dev, NULL, skb);
1095 
1096 resched:
1097         /*
1098          * schedule next beacon
1099          * TODO: use hardware support for beacon timing
1100          */
1101         schedule_delayed_work(&vif_priv->beacon_work,
1102                         usecs_to_jiffies(1024 * vif->bss_conf.beacon_int));
1103 }
1104 
1105 
1106 static int rtl8187_add_interface(struct ieee80211_hw *dev,
1107                                  struct ieee80211_vif *vif)
1108 {
1109         struct rtl8187_priv *priv = dev->priv;
1110         struct rtl8187_vif *vif_priv;
1111         int i;
1112         int ret = -EOPNOTSUPP;
1113 
1114         mutex_lock(&priv->conf_mutex);
1115         if (priv->vif)
1116                 goto exit;
1117 
1118         switch (vif->type) {
1119         case NL80211_IFTYPE_STATION:
1120         case NL80211_IFTYPE_ADHOC:
1121                 break;
1122         default:
1123                 goto exit;
1124         }
1125 
1126         ret = 0;
1127         priv->vif = vif;
1128 
1129         /* Initialize driver private area */
1130         vif_priv = (struct rtl8187_vif *)&vif->drv_priv;
1131         vif_priv->dev = dev;
1132         INIT_DELAYED_WORK(&vif_priv->beacon_work, rtl8187_beacon_work);
1133         vif_priv->enable_beacon = false;
1134 
1135 
1136         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
1137         for (i = 0; i < ETH_ALEN; i++)
1138                 rtl818x_iowrite8(priv, &priv->map->MAC[i],
1139                                  ((u8 *)vif->addr)[i]);
1140         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
1141 
1142 exit:
1143         mutex_unlock(&priv->conf_mutex);
1144         return ret;
1145 }
1146 
1147 static void rtl8187_remove_interface(struct ieee80211_hw *dev,
1148                                      struct ieee80211_vif *vif)
1149 {
1150         struct rtl8187_priv *priv = dev->priv;
1151         mutex_lock(&priv->conf_mutex);
1152         priv->vif = NULL;
1153         mutex_unlock(&priv->conf_mutex);
1154 }
1155 
1156 static int rtl8187_config(struct ieee80211_hw *dev, u32 changed)
1157 {
1158         struct rtl8187_priv *priv = dev->priv;
1159         struct ieee80211_conf *conf = &dev->conf;
1160         u32 reg;
1161 
1162         mutex_lock(&priv->conf_mutex);
1163         reg = rtl818x_ioread32(priv, &priv->map->TX_CONF);
1164         /* Enable TX loopback on MAC level to avoid TX during channel
1165          * changes, as this has be seen to causes problems and the
1166          * card will stop work until next reset
1167          */
1168         rtl818x_iowrite32(priv, &priv->map->TX_CONF,
1169                           reg | RTL818X_TX_CONF_LOOPBACK_MAC);
1170         priv->rf->set_chan(dev, conf);
1171         msleep(10);
1172         rtl818x_iowrite32(priv, &priv->map->TX_CONF, reg);
1173 
1174         rtl818x_iowrite16(priv, &priv->map->ATIM_WND, 2);
1175         rtl818x_iowrite16(priv, &priv->map->ATIMTR_INTERVAL, 100);
1176         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL, 100);
1177         rtl818x_iowrite16(priv, &priv->map->BEACON_INTERVAL_TIME, 100);
1178         mutex_unlock(&priv->conf_mutex);
1179         return 0;
1180 }
1181 
1182 /*
1183  * With 8187B, AC_*_PARAM clashes with FEMR definition in struct rtl818x_csr for
1184  * example. Thus we have to use raw values for AC_*_PARAM register addresses.
1185  */
1186 static __le32 *rtl8187b_ac_addr[4] = {
1187         (__le32 *) 0xFFF0, /* AC_VO */
1188         (__le32 *) 0xFFF4, /* AC_VI */
1189         (__le32 *) 0xFFFC, /* AC_BK */
1190         (__le32 *) 0xFFF8, /* AC_BE */
1191 };
1192 
1193 #define SIFS_TIME 0xa
1194 
1195 static void rtl8187_conf_erp(struct rtl8187_priv *priv, bool use_short_slot,
1196                              bool use_short_preamble)
1197 {
1198         if (priv->is_rtl8187b) {
1199                 u8 difs, eifs;
1200                 u16 ack_timeout;
1201                 int queue;
1202 
1203                 if (use_short_slot) {
1204                         priv->slot_time = 0x9;
1205                         difs = 0x1c;
1206                         eifs = 0x53;
1207                 } else {
1208                         priv->slot_time = 0x14;
1209                         difs = 0x32;
1210                         eifs = 0x5b;
1211                 }
1212                 rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
1213                 rtl818x_iowrite8(priv, &priv->map->SLOT, priv->slot_time);
1214                 rtl818x_iowrite8(priv, &priv->map->DIFS, difs);
1215 
1216                 /*
1217                  * BRSR+1 on 8187B is in fact EIFS register
1218                  * Value in units of 4 us
1219                  */
1220                 rtl818x_iowrite8(priv, (u8 *)&priv->map->BRSR + 1, eifs);
1221 
1222                 /*
1223                  * For 8187B, CARRIER_SENSE_COUNTER is in fact ack timeout
1224                  * register. In units of 4 us like eifs register
1225                  * ack_timeout = ack duration + plcp + difs + preamble
1226                  */
1227                 ack_timeout = 112 + 48 + difs;
1228                 if (use_short_preamble)
1229                         ack_timeout += 72;
1230                 else
1231                         ack_timeout += 144;
1232                 rtl818x_iowrite8(priv, &priv->map->CARRIER_SENSE_COUNTER,
1233                                  DIV_ROUND_UP(ack_timeout, 4));
1234 
1235                 for (queue = 0; queue < 4; queue++)
1236                         rtl818x_iowrite8(priv, (u8 *) rtl8187b_ac_addr[queue],
1237                                          priv->aifsn[queue] * priv->slot_time +
1238                                          SIFS_TIME);
1239         } else {
1240                 rtl818x_iowrite8(priv, &priv->map->SIFS, 0x22);
1241                 if (use_short_slot) {
1242                         rtl818x_iowrite8(priv, &priv->map->SLOT, 0x9);
1243                         rtl818x_iowrite8(priv, &priv->map->DIFS, 0x14);
1244                         rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x14);
1245                 } else {
1246                         rtl818x_iowrite8(priv, &priv->map->SLOT, 0x14);
1247                         rtl818x_iowrite8(priv, &priv->map->DIFS, 0x24);
1248                         rtl818x_iowrite8(priv, &priv->map->EIFS, 91 - 0x24);
1249                 }
1250         }
1251 }
1252 
1253 static void rtl8187_bss_info_changed(struct ieee80211_hw *dev,
1254                                      struct ieee80211_vif *vif,
1255                                      struct ieee80211_bss_conf *info,
1256                                      u32 changed)
1257 {
1258         struct rtl8187_priv *priv = dev->priv;
1259         struct rtl8187_vif *vif_priv;
1260         int i;
1261         u8 reg;
1262 
1263         vif_priv = (struct rtl8187_vif *)&vif->drv_priv;
1264 
1265         if (changed & BSS_CHANGED_BSSID) {
1266                 mutex_lock(&priv->conf_mutex);
1267                 for (i = 0; i < ETH_ALEN; i++)
1268                         rtl818x_iowrite8(priv, &priv->map->BSSID[i],
1269                                          info->bssid[i]);
1270 
1271                 if (priv->is_rtl8187b)
1272                         reg = RTL818X_MSR_ENEDCA;
1273                 else
1274                         reg = 0;
1275 
1276                 if (is_valid_ether_addr(info->bssid)) {
1277                         if (vif->type == NL80211_IFTYPE_ADHOC)
1278                                 reg |= RTL818X_MSR_ADHOC;
1279                         else
1280                                 reg |= RTL818X_MSR_INFRA;
1281                 }
1282                 else
1283                         reg |= RTL818X_MSR_NO_LINK;
1284 
1285                 rtl818x_iowrite8(priv, &priv->map->MSR, reg);
1286 
1287                 mutex_unlock(&priv->conf_mutex);
1288         }
1289 
1290         if (changed & (BSS_CHANGED_ERP_SLOT | BSS_CHANGED_ERP_PREAMBLE))
1291                 rtl8187_conf_erp(priv, info->use_short_slot,
1292                                  info->use_short_preamble);
1293 
1294         if (changed & BSS_CHANGED_BEACON_ENABLED)
1295                 vif_priv->enable_beacon = info->enable_beacon;
1296 
1297         if (changed & (BSS_CHANGED_BEACON_ENABLED | BSS_CHANGED_BEACON)) {
1298                 cancel_delayed_work_sync(&vif_priv->beacon_work);
1299                 if (vif_priv->enable_beacon)
1300                         schedule_work(&vif_priv->beacon_work.work);
1301         }
1302 
1303 }
1304 
1305 static u64 rtl8187_prepare_multicast(struct ieee80211_hw *dev,
1306                                      struct netdev_hw_addr_list *mc_list)
1307 {
1308         return netdev_hw_addr_list_count(mc_list);
1309 }
1310 
1311 static void rtl8187_configure_filter(struct ieee80211_hw *dev,
1312                                      unsigned int changed_flags,
1313                                      unsigned int *total_flags,
1314                                      u64 multicast)
1315 {
1316         struct rtl8187_priv *priv = dev->priv;
1317 
1318         if (changed_flags & FIF_FCSFAIL)
1319                 priv->rx_conf ^= RTL818X_RX_CONF_FCS;
1320         if (changed_flags & FIF_CONTROL)
1321                 priv->rx_conf ^= RTL818X_RX_CONF_CTRL;
1322         if (changed_flags & FIF_OTHER_BSS)
1323                 priv->rx_conf ^= RTL818X_RX_CONF_MONITOR;
1324         if (*total_flags & FIF_ALLMULTI || multicast > 0)
1325                 priv->rx_conf |= RTL818X_RX_CONF_MULTICAST;
1326         else
1327                 priv->rx_conf &= ~RTL818X_RX_CONF_MULTICAST;
1328 
1329         *total_flags = 0;
1330 
1331         if (priv->rx_conf & RTL818X_RX_CONF_FCS)
1332                 *total_flags |= FIF_FCSFAIL;
1333         if (priv->rx_conf & RTL818X_RX_CONF_CTRL)
1334                 *total_flags |= FIF_CONTROL;
1335         if (priv->rx_conf & RTL818X_RX_CONF_MONITOR)
1336                 *total_flags |= FIF_OTHER_BSS;
1337         if (priv->rx_conf & RTL818X_RX_CONF_MULTICAST)
1338                 *total_flags |= FIF_ALLMULTI;
1339 
1340         rtl818x_iowrite32_async(priv, &priv->map->RX_CONF, priv->rx_conf);
1341 }
1342 
1343 static int rtl8187_conf_tx(struct ieee80211_hw *dev,
1344                            struct ieee80211_vif *vif, u16 queue,
1345                            const struct ieee80211_tx_queue_params *params)
1346 {
1347         struct rtl8187_priv *priv = dev->priv;
1348         u8 cw_min, cw_max;
1349 
1350         if (queue > 3)
1351                 return -EINVAL;
1352 
1353         cw_min = fls(params->cw_min);
1354         cw_max = fls(params->cw_max);
1355 
1356         if (priv->is_rtl8187b) {
1357                 priv->aifsn[queue] = params->aifs;
1358 
1359                 /*
1360                  * This is the structure of AC_*_PARAM registers in 8187B:
1361                  * - TXOP limit field, bit offset = 16
1362                  * - ECWmax, bit offset = 12
1363                  * - ECWmin, bit offset = 8
1364                  * - AIFS, bit offset = 0
1365                  */
1366                 rtl818x_iowrite32(priv, rtl8187b_ac_addr[queue],
1367                                   (params->txop << 16) | (cw_max << 12) |
1368                                   (cw_min << 8) | (params->aifs *
1369                                   priv->slot_time + SIFS_TIME));
1370         } else {
1371                 if (queue != 0)
1372                         return -EINVAL;
1373 
1374                 rtl818x_iowrite8(priv, &priv->map->CW_VAL,
1375                                  cw_min | (cw_max << 4));
1376         }
1377         return 0;
1378 }
1379 
1380 
1381 static const struct ieee80211_ops rtl8187_ops = {
1382         .tx                     = rtl8187_tx,
1383         .start                  = rtl8187_start,
1384         .stop                   = rtl8187_stop,
1385         .add_interface          = rtl8187_add_interface,
1386         .remove_interface       = rtl8187_remove_interface,
1387         .config                 = rtl8187_config,
1388         .bss_info_changed       = rtl8187_bss_info_changed,
1389         .prepare_multicast      = rtl8187_prepare_multicast,
1390         .configure_filter       = rtl8187_configure_filter,
1391         .conf_tx                = rtl8187_conf_tx,
1392         .rfkill_poll            = rtl8187_rfkill_poll,
1393         .get_tsf                = rtl8187_get_tsf,
1394 };
1395 
1396 static void rtl8187_eeprom_register_read(struct eeprom_93cx6 *eeprom)
1397 {
1398         struct ieee80211_hw *dev = eeprom->data;
1399         struct rtl8187_priv *priv = dev->priv;
1400         u8 reg = rtl818x_ioread8(priv, &priv->map->EEPROM_CMD);
1401 
1402         eeprom->reg_data_in = reg & RTL818X_EEPROM_CMD_WRITE;
1403         eeprom->reg_data_out = reg & RTL818X_EEPROM_CMD_READ;
1404         eeprom->reg_data_clock = reg & RTL818X_EEPROM_CMD_CK;
1405         eeprom->reg_chip_select = reg & RTL818X_EEPROM_CMD_CS;
1406 }
1407 
1408 static void rtl8187_eeprom_register_write(struct eeprom_93cx6 *eeprom)
1409 {
1410         struct ieee80211_hw *dev = eeprom->data;
1411         struct rtl8187_priv *priv = dev->priv;
1412         u8 reg = RTL818X_EEPROM_CMD_PROGRAM;
1413 
1414         if (eeprom->reg_data_in)
1415                 reg |= RTL818X_EEPROM_CMD_WRITE;
1416         if (eeprom->reg_data_out)
1417                 reg |= RTL818X_EEPROM_CMD_READ;
1418         if (eeprom->reg_data_clock)
1419                 reg |= RTL818X_EEPROM_CMD_CK;
1420         if (eeprom->reg_chip_select)
1421                 reg |= RTL818X_EEPROM_CMD_CS;
1422 
1423         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, reg);
1424         udelay(10);
1425 }
1426 
1427 static int rtl8187_probe(struct usb_interface *intf,
1428                                    const struct usb_device_id *id)
1429 {
1430         struct usb_device *udev = interface_to_usbdev(intf);
1431         struct ieee80211_hw *dev;
1432         struct rtl8187_priv *priv;
1433         struct eeprom_93cx6 eeprom;
1434         struct ieee80211_channel *channel;
1435         const char *chip_name;
1436         u16 txpwr, reg;
1437         u16 product_id = le16_to_cpu(udev->descriptor.idProduct);
1438         int err, i;
1439         u8 mac_addr[ETH_ALEN];
1440 
1441         dev = ieee80211_alloc_hw(sizeof(*priv), &rtl8187_ops);
1442         if (!dev) {
1443                 printk(KERN_ERR "rtl8187: ieee80211 alloc failed\n");
1444                 return -ENOMEM;
1445         }
1446 
1447         priv = dev->priv;
1448         priv->is_rtl8187b = (id->driver_info == DEVICE_RTL8187B);
1449 
1450         /* allocate "DMA aware" buffer for register accesses */
1451         priv->io_dmabuf = kmalloc(sizeof(*priv->io_dmabuf), GFP_KERNEL);
1452         if (!priv->io_dmabuf) {
1453                 err = -ENOMEM;
1454                 goto err_free_dev;
1455         }
1456         mutex_init(&priv->io_mutex);
1457 
1458         SET_IEEE80211_DEV(dev, &intf->dev);
1459         usb_set_intfdata(intf, dev);
1460         priv->udev = udev;
1461 
1462         usb_get_dev(udev);
1463 
1464         skb_queue_head_init(&priv->rx_queue);
1465 
1466         BUILD_BUG_ON(sizeof(priv->channels) != sizeof(rtl818x_channels));
1467         BUILD_BUG_ON(sizeof(priv->rates) != sizeof(rtl818x_rates));
1468 
1469         memcpy(priv->channels, rtl818x_channels, sizeof(rtl818x_channels));
1470         memcpy(priv->rates, rtl818x_rates, sizeof(rtl818x_rates));
1471         priv->map = (struct rtl818x_csr *)0xFF00;
1472 
1473         priv->band.band = IEEE80211_BAND_2GHZ;
1474         priv->band.channels = priv->channels;
1475         priv->band.n_channels = ARRAY_SIZE(rtl818x_channels);
1476         priv->band.bitrates = priv->rates;
1477         priv->band.n_bitrates = ARRAY_SIZE(rtl818x_rates);
1478         dev->wiphy->bands[IEEE80211_BAND_2GHZ] = &priv->band;
1479 
1480 
1481         dev->flags = IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
1482                      IEEE80211_HW_SIGNAL_DBM |
1483                      IEEE80211_HW_RX_INCLUDES_FCS;
1484         /* Initialize rate-control variables */
1485         dev->max_rates = 1;
1486         dev->max_rate_tries = RETRY_COUNT;
1487 
1488         eeprom.data = dev;
1489         eeprom.register_read = rtl8187_eeprom_register_read;
1490         eeprom.register_write = rtl8187_eeprom_register_write;
1491         if (rtl818x_ioread32(priv, &priv->map->RX_CONF) & (1 << 6))
1492                 eeprom.width = PCI_EEPROM_WIDTH_93C66;
1493         else
1494                 eeprom.width = PCI_EEPROM_WIDTH_93C46;
1495 
1496         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_CONFIG);
1497         udelay(10);
1498 
1499         eeprom_93cx6_multiread(&eeprom, RTL8187_EEPROM_MAC_ADDR,
1500                                (__le16 __force *)mac_addr, 3);
1501         if (!is_valid_ether_addr(mac_addr)) {
1502                 printk(KERN_WARNING "rtl8187: Invalid hwaddr! Using randomly "
1503                        "generated MAC address\n");
1504                 eth_random_addr(mac_addr);
1505         }
1506         SET_IEEE80211_PERM_ADDR(dev, mac_addr);
1507 
1508         channel = priv->channels;
1509         for (i = 0; i < 3; i++) {
1510                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_1 + i,
1511                                   &txpwr);
1512                 (*channel++).hw_value = txpwr & 0xFF;
1513                 (*channel++).hw_value = txpwr >> 8;
1514         }
1515         for (i = 0; i < 2; i++) {
1516                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_4 + i,
1517                                   &txpwr);
1518                 (*channel++).hw_value = txpwr & 0xFF;
1519                 (*channel++).hw_value = txpwr >> 8;
1520         }
1521 
1522         eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_BASE,
1523                           &priv->txpwr_base);
1524 
1525         reg = rtl818x_ioread8(priv, &priv->map->PGSELECT) & ~1;
1526         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg | 1);
1527         /* 0 means asic B-cut, we should use SW 3 wire
1528          * bit-by-bit banging for radio. 1 means we can use
1529          * USB specific request to write radio registers */
1530         priv->asic_rev = rtl818x_ioread8(priv, (u8 *)0xFFFE) & 0x3;
1531         rtl818x_iowrite8(priv, &priv->map->PGSELECT, reg);
1532         rtl818x_iowrite8(priv, &priv->map->EEPROM_CMD, RTL818X_EEPROM_CMD_NORMAL);
1533 
1534         if (!priv->is_rtl8187b) {
1535                 u32 reg32;
1536                 reg32 = rtl818x_ioread32(priv, &priv->map->TX_CONF);
1537                 reg32 &= RTL818X_TX_CONF_HWVER_MASK;
1538                 switch (reg32) {
1539                 case RTL818X_TX_CONF_R8187vD_B:
1540                         /* Some RTL8187B devices have a USB ID of 0x8187
1541                          * detect them here */
1542                         chip_name = "RTL8187BvB(early)";
1543                         priv->is_rtl8187b = 1;
1544                         priv->hw_rev = RTL8187BvB;
1545                         break;
1546                 case RTL818X_TX_CONF_R8187vD:
1547                         chip_name = "RTL8187vD";
1548                         break;
1549                 default:
1550                         chip_name = "RTL8187vB (default)";
1551                 }
1552        } else {
1553                 /*
1554                  * Force USB request to write radio registers for 8187B, Realtek
1555                  * only uses it in their sources
1556                  */
1557                 /*if (priv->asic_rev == 0) {
1558                         printk(KERN_WARNING "rtl8187: Forcing use of USB "
1559                                "requests to write to radio registers\n");
1560                         priv->asic_rev = 1;
1561                 }*/
1562                 switch (rtl818x_ioread8(priv, (u8 *)0xFFE1)) {
1563                 case RTL818X_R8187B_B:
1564                         chip_name = "RTL8187BvB";
1565                         priv->hw_rev = RTL8187BvB;
1566                         break;
1567                 case RTL818X_R8187B_D:
1568                         chip_name = "RTL8187BvD";
1569                         priv->hw_rev = RTL8187BvD;
1570                         break;
1571                 case RTL818X_R8187B_E:
1572                         chip_name = "RTL8187BvE";
1573                         priv->hw_rev = RTL8187BvE;
1574                         break;
1575                 default:
1576                         chip_name = "RTL8187BvB (default)";
1577                         priv->hw_rev = RTL8187BvB;
1578                 }
1579         }
1580 
1581         if (!priv->is_rtl8187b) {
1582                 for (i = 0; i < 2; i++) {
1583                         eeprom_93cx6_read(&eeprom,
1584                                           RTL8187_EEPROM_TXPWR_CHAN_6 + i,
1585                                           &txpwr);
1586                         (*channel++).hw_value = txpwr & 0xFF;
1587                         (*channel++).hw_value = txpwr >> 8;
1588                 }
1589         } else {
1590                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_TXPWR_CHAN_6,
1591                                   &txpwr);
1592                 (*channel++).hw_value = txpwr & 0xFF;
1593 
1594                 eeprom_93cx6_read(&eeprom, 0x0A, &txpwr);
1595                 (*channel++).hw_value = txpwr & 0xFF;
1596 
1597                 eeprom_93cx6_read(&eeprom, 0x1C, &txpwr);
1598                 (*channel++).hw_value = txpwr & 0xFF;
1599                 (*channel++).hw_value = txpwr >> 8;
1600         }
1601         /* Handle the differing rfkill GPIO bit in different models */
1602         priv->rfkill_mask = RFKILL_MASK_8187_89_97;
1603         if (product_id == 0x8197 || product_id == 0x8198) {
1604                 eeprom_93cx6_read(&eeprom, RTL8187_EEPROM_SELECT_GPIO, &reg);
1605                 if (reg & 0xFF00)
1606                         priv->rfkill_mask = RFKILL_MASK_8198;
1607         }
1608         dev->vif_data_size = sizeof(struct rtl8187_vif);
1609         dev->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION) |
1610                                       BIT(NL80211_IFTYPE_ADHOC) ;
1611 
1612         if ((id->driver_info == DEVICE_RTL8187) && priv->is_rtl8187b)
1613                 printk(KERN_INFO "rtl8187: inconsistency between id with OEM"
1614                        " info!\n");
1615 
1616         priv->rf = rtl8187_detect_rf(dev);
1617         dev->extra_tx_headroom = (!priv->is_rtl8187b) ?
1618                                   sizeof(struct rtl8187_tx_hdr) :
1619                                   sizeof(struct rtl8187b_tx_hdr);
1620         if (!priv->is_rtl8187b)
1621                 dev->queues = 1;
1622         else
1623                 dev->queues = 4;
1624 
1625         err = ieee80211_register_hw(dev);
1626         if (err) {
1627                 printk(KERN_ERR "rtl8187: Cannot register device\n");
1628                 goto err_free_dmabuf;
1629         }
1630         mutex_init(&priv->conf_mutex);
1631         skb_queue_head_init(&priv->b_tx_status.queue);
1632 
1633         wiphy_info(dev->wiphy, "hwaddr %pM, %s V%d + %s, rfkill mask %d\n",
1634                    mac_addr, chip_name, priv->asic_rev, priv->rf->name,
1635                    priv->rfkill_mask);
1636 
1637 #ifdef CONFIG_RTL8187_LEDS
1638         eeprom_93cx6_read(&eeprom, 0x3F, &reg);
1639         reg &= 0xFF;
1640         rtl8187_leds_init(dev, reg);
1641 #endif
1642         rtl8187_rfkill_init(dev);
1643 
1644         return 0;
1645 
1646  err_free_dmabuf:
1647         kfree(priv->io_dmabuf);
1648         usb_set_intfdata(intf, NULL);
1649         usb_put_dev(udev);
1650  err_free_dev:
1651         ieee80211_free_hw(dev);
1652         return err;
1653 }
1654 
1655 static void rtl8187_disconnect(struct usb_interface *intf)
1656 {
1657         struct ieee80211_hw *dev = usb_get_intfdata(intf);
1658         struct rtl8187_priv *priv;
1659 
1660         if (!dev)
1661                 return;
1662 
1663 #ifdef CONFIG_RTL8187_LEDS
1664         rtl8187_leds_exit(dev);
1665 #endif
1666         rtl8187_rfkill_exit(dev);
1667         ieee80211_unregister_hw(dev);
1668 
1669         priv = dev->priv;
1670         usb_reset_device(priv->udev);
1671         usb_put_dev(interface_to_usbdev(intf));
1672         kfree(priv->io_dmabuf);
1673         ieee80211_free_hw(dev);
1674 }
1675 
1676 static struct usb_driver rtl8187_driver = {
1677         .name           = KBUILD_MODNAME,
1678         .id_table       = rtl8187_table,
1679         .probe          = rtl8187_probe,
1680         .disconnect     = rtl8187_disconnect,
1681         .disable_hub_initiated_lpm = 1,
1682 };
1683 
1684 module_usb_driver(rtl8187_driver);
1685 

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