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0001 /*
0002  * Copyright (c) 2006 Damien Bergamini <damien.bergamini@free.fr>
0003  * Copyright (c) 2006 Sam Leffler, Errno Consulting
0004  * Copyright (c) 2007 Christoph Hellwig <hch@lst.de>
0005  * Copyright (c) 2008-2009 Weongyo Jeong <weongyo@freebsd.org>
0006  * Copyright (c) 2012 Pontus Fuchs <pontus.fuchs@gmail.com>
0007  *
0008  * Permission to use, copy, modify, and/or distribute this software for any
0009  * purpose with or without fee is hereby granted, provided that the above
0010  * copyright notice and this permission notice appear in all copies.
0011  *
0012  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
0013  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
0014  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
0015  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
0016  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
0017  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
0018  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
0019  */
0020 
0021 /*
0022  * This driver is based on the uath driver written by Damien Bergamini for
0023  * OpenBSD, who did black-box analysis of the Windows binary driver to find
0024  * out how the hardware works.  It contains a lot magic numbers because of
0025  * that and only has minimal functionality.
0026  */
0027 #include <linux/compiler.h>
0028 #include <linux/kernel.h>
0029 #include <linux/module.h>
0030 #include <linux/list.h>
0031 #include <linux/completion.h>
0032 #include <linux/firmware.h>
0033 #include <linux/skbuff.h>
0034 #include <linux/usb.h>
0035 #include <net/mac80211.h>
0036 
0037 #include "ar5523.h"
0038 #include "ar5523_hw.h"
0039 
0040 /*
0041  * Various supported device vendors/products.
0042  * UB51: AR5005UG 802.11b/g, UB52: AR5005UX 802.11a/b/g
0043  */
0044 
0045 static int ar5523_submit_rx_cmd(struct ar5523 *ar);
0046 static void ar5523_data_tx_pkt_put(struct ar5523 *ar);
0047 
0048 static void ar5523_read_reply(struct ar5523 *ar, struct ar5523_cmd_hdr *hdr,
0049                   struct ar5523_tx_cmd *cmd)
0050 {
0051     int dlen, olen;
0052     __be32 *rp;
0053 
0054     dlen = be32_to_cpu(hdr->len) - sizeof(*hdr);
0055 
0056     if (dlen < 0) {
0057         WARN_ON(1);
0058         goto out;
0059     }
0060 
0061     ar5523_dbg(ar, "Code = %d len = %d\n", be32_to_cpu(hdr->code) & 0xff,
0062            dlen);
0063 
0064     rp = (__be32 *)(hdr + 1);
0065     if (dlen >= sizeof(u32)) {
0066         olen = be32_to_cpu(rp[0]);
0067         dlen -= sizeof(u32);
0068         if (olen == 0) {
0069             /* convention is 0 =>'s one word */
0070             olen = sizeof(u32);
0071         }
0072     } else
0073         olen = 0;
0074 
0075     if (cmd->odata) {
0076         if (cmd->olen < olen) {
0077             ar5523_err(ar, "olen too small %d < %d\n",
0078                    cmd->olen, olen);
0079             cmd->olen = 0;
0080             cmd->res = -EOVERFLOW;
0081         } else {
0082             cmd->olen = olen;
0083             memcpy(cmd->odata, &rp[1], olen);
0084             cmd->res = 0;
0085         }
0086     }
0087 
0088 out:
0089     complete(&cmd->done);
0090 }
0091 
0092 static void ar5523_cmd_rx_cb(struct urb *urb)
0093 {
0094     struct ar5523 *ar = urb->context;
0095     struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
0096     struct ar5523_cmd_hdr *hdr = ar->rx_cmd_buf;
0097     int dlen;
0098     u32 code, hdrlen;
0099 
0100     if (urb->status) {
0101         if (urb->status != -ESHUTDOWN)
0102             ar5523_err(ar, "RX USB error %d.\n", urb->status);
0103         goto skip;
0104     }
0105 
0106     if (urb->actual_length < sizeof(struct ar5523_cmd_hdr)) {
0107         ar5523_err(ar, "RX USB too short.\n");
0108         goto skip;
0109     }
0110 
0111     ar5523_dbg(ar, "%s code %02x priv %d\n", __func__,
0112            be32_to_cpu(hdr->code) & 0xff, hdr->priv);
0113 
0114     code = be32_to_cpu(hdr->code);
0115     hdrlen = be32_to_cpu(hdr->len);
0116 
0117     switch (code & 0xff) {
0118     default:
0119         /* reply to a read command */
0120         if (hdr->priv != AR5523_CMD_ID) {
0121             ar5523_err(ar, "Unexpected command id: %02x\n",
0122                    code & 0xff);
0123             goto skip;
0124         }
0125         ar5523_read_reply(ar, hdr, cmd);
0126         break;
0127 
0128     case WDCMSG_DEVICE_AVAIL:
0129         ar5523_dbg(ar, "WDCMSG_DEVICE_AVAIL\n");
0130         cmd->res = 0;
0131         cmd->olen = 0;
0132         complete(&cmd->done);
0133         break;
0134 
0135     case WDCMSG_SEND_COMPLETE:
0136         ar5523_dbg(ar, "WDCMSG_SEND_COMPLETE: %d pending\n",
0137             atomic_read(&ar->tx_nr_pending));
0138         if (!test_bit(AR5523_HW_UP, &ar->flags))
0139             ar5523_dbg(ar, "Unexpected WDCMSG_SEND_COMPLETE\n");
0140         else {
0141             mod_timer(&ar->tx_wd_timer,
0142                   jiffies + AR5523_TX_WD_TIMEOUT);
0143             ar5523_data_tx_pkt_put(ar);
0144 
0145         }
0146         break;
0147 
0148     case WDCMSG_TARGET_START:
0149         /* This command returns a bogus id so it needs special
0150            handling */
0151         dlen = hdrlen - sizeof(*hdr);
0152         if (dlen != (int)sizeof(u32)) {
0153             ar5523_err(ar, "Invalid reply to WDCMSG_TARGET_START");
0154             return;
0155         }
0156         if (!cmd->odata) {
0157             ar5523_err(ar, "Unexpected WDCMSG_TARGET_START reply");
0158             return;
0159         }
0160         memcpy(cmd->odata, hdr + 1, sizeof(u32));
0161         cmd->olen = sizeof(u32);
0162         cmd->res = 0;
0163         complete(&cmd->done);
0164         break;
0165 
0166     case WDCMSG_STATS_UPDATE:
0167         ar5523_dbg(ar, "WDCMSG_STATS_UPDATE\n");
0168         break;
0169     }
0170 
0171 skip:
0172     ar5523_submit_rx_cmd(ar);
0173 }
0174 
0175 static int ar5523_alloc_rx_cmd(struct ar5523 *ar)
0176 {
0177     ar->rx_cmd_urb = usb_alloc_urb(0, GFP_KERNEL);
0178     if (!ar->rx_cmd_urb)
0179         return -ENOMEM;
0180 
0181     ar->rx_cmd_buf = usb_alloc_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
0182                         GFP_KERNEL,
0183                         &ar->rx_cmd_urb->transfer_dma);
0184     if (!ar->rx_cmd_buf) {
0185         usb_free_urb(ar->rx_cmd_urb);
0186         return -ENOMEM;
0187     }
0188     return 0;
0189 }
0190 
0191 static void ar5523_cancel_rx_cmd(struct ar5523 *ar)
0192 {
0193     usb_kill_urb(ar->rx_cmd_urb);
0194 }
0195 
0196 static void ar5523_free_rx_cmd(struct ar5523 *ar)
0197 {
0198     usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ,
0199               ar->rx_cmd_buf, ar->rx_cmd_urb->transfer_dma);
0200     usb_free_urb(ar->rx_cmd_urb);
0201 }
0202 
0203 static int ar5523_submit_rx_cmd(struct ar5523 *ar)
0204 {
0205     int error;
0206 
0207     usb_fill_bulk_urb(ar->rx_cmd_urb, ar->dev,
0208               ar5523_cmd_rx_pipe(ar->dev), ar->rx_cmd_buf,
0209               AR5523_MAX_RXCMDSZ, ar5523_cmd_rx_cb, ar);
0210     ar->rx_cmd_urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0211 
0212     error = usb_submit_urb(ar->rx_cmd_urb, GFP_ATOMIC);
0213     if (error) {
0214         if (error != -ENODEV)
0215             ar5523_err(ar, "error %d when submitting rx urb\n",
0216                    error);
0217         return error;
0218     }
0219     return 0;
0220 }
0221 
0222 /*
0223  * Command submitted cb
0224  */
0225 static void ar5523_cmd_tx_cb(struct urb *urb)
0226 {
0227     struct ar5523_tx_cmd *cmd = urb->context;
0228     struct ar5523 *ar = cmd->ar;
0229 
0230     if (urb->status) {
0231         ar5523_err(ar, "Failed to TX command. Status = %d\n",
0232                urb->status);
0233         cmd->res = urb->status;
0234         complete(&cmd->done);
0235         return;
0236     }
0237 
0238     if (!(cmd->flags & AR5523_CMD_FLAG_READ)) {
0239         cmd->res = 0;
0240         complete(&cmd->done);
0241     }
0242 }
0243 
0244 static int ar5523_cmd(struct ar5523 *ar, u32 code, const void *idata,
0245               int ilen, void *odata, int olen, int flags)
0246 {
0247     struct ar5523_cmd_hdr *hdr;
0248     struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
0249     int xferlen, error;
0250 
0251     /* always bulk-out a multiple of 4 bytes */
0252     xferlen = (sizeof(struct ar5523_cmd_hdr) + ilen + 3) & ~3;
0253 
0254     hdr = (struct ar5523_cmd_hdr *)cmd->buf_tx;
0255     memset(hdr, 0, sizeof(struct ar5523_cmd_hdr));
0256     hdr->len  = cpu_to_be32(xferlen);
0257     hdr->code = cpu_to_be32(code);
0258     hdr->priv = AR5523_CMD_ID;
0259 
0260     if (flags & AR5523_CMD_FLAG_MAGIC)
0261         hdr->magic = cpu_to_be32(1 << 24);
0262     if (ilen)
0263         memcpy(hdr + 1, idata, ilen);
0264 
0265     cmd->odata = odata;
0266     cmd->olen = olen;
0267     cmd->flags = flags;
0268 
0269     ar5523_dbg(ar, "do cmd %02x\n", code);
0270 
0271     usb_fill_bulk_urb(cmd->urb_tx, ar->dev, ar5523_cmd_tx_pipe(ar->dev),
0272               cmd->buf_tx, xferlen, ar5523_cmd_tx_cb, cmd);
0273     cmd->urb_tx->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
0274 
0275     error = usb_submit_urb(cmd->urb_tx, GFP_KERNEL);
0276     if (error) {
0277         ar5523_err(ar, "could not send command 0x%x, error=%d\n",
0278                code, error);
0279         return error;
0280     }
0281 
0282     if (!wait_for_completion_timeout(&cmd->done, 2 * HZ)) {
0283         cmd->odata = NULL;
0284         ar5523_err(ar, "timeout waiting for command %02x reply\n",
0285                code);
0286         cmd->res = -ETIMEDOUT;
0287     }
0288     return cmd->res;
0289 }
0290 
0291 static int ar5523_cmd_write(struct ar5523 *ar, u32 code, const void *data,
0292                 int len, int flags)
0293 {
0294     flags &= ~AR5523_CMD_FLAG_READ;
0295     return ar5523_cmd(ar, code, data, len, NULL, 0, flags);
0296 }
0297 
0298 static int ar5523_cmd_read(struct ar5523 *ar, u32 code, const void *idata,
0299                int ilen, void *odata, int olen, int flags)
0300 {
0301     flags |= AR5523_CMD_FLAG_READ;
0302     return ar5523_cmd(ar, code, idata, ilen, odata, olen, flags);
0303 }
0304 
0305 static int ar5523_config(struct ar5523 *ar, u32 reg, u32 val)
0306 {
0307     struct ar5523_write_mac write;
0308     int error;
0309 
0310     write.reg = cpu_to_be32(reg);
0311     write.len = cpu_to_be32(0); /* 0 = single write */
0312     *(__be32 *)write.data = cpu_to_be32(val);
0313 
0314     error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
0315                  3 * sizeof(u32), 0);
0316     if (error != 0)
0317         ar5523_err(ar, "could not write register 0x%02x\n", reg);
0318     return error;
0319 }
0320 
0321 static int ar5523_config_multi(struct ar5523 *ar, u32 reg, const void *data,
0322                    int len)
0323 {
0324     struct ar5523_write_mac write;
0325     int error;
0326 
0327     write.reg = cpu_to_be32(reg);
0328     write.len = cpu_to_be32(len);
0329     memcpy(write.data, data, len);
0330 
0331     /* properly handle the case where len is zero (reset) */
0332     error = ar5523_cmd_write(ar, WDCMSG_TARGET_SET_CONFIG, &write,
0333         (len == 0) ? sizeof(u32) : 2 * sizeof(u32) + len, 0);
0334     if (error != 0)
0335         ar5523_err(ar, "could not write %d bytes to register 0x%02x\n",
0336                len, reg);
0337     return error;
0338 }
0339 
0340 static int ar5523_get_status(struct ar5523 *ar, u32 which, void *odata,
0341                  int olen)
0342 {
0343     int error;
0344     __be32 which_be;
0345 
0346     which_be = cpu_to_be32(which);
0347     error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_STATUS,
0348         &which_be, sizeof(which_be), odata, olen, AR5523_CMD_FLAG_MAGIC);
0349     if (error != 0)
0350         ar5523_err(ar, "could not read EEPROM offset 0x%02x\n", which);
0351     return error;
0352 }
0353 
0354 static int ar5523_get_capability(struct ar5523 *ar, u32 cap, u32 *val)
0355 {
0356     int error;
0357     __be32 cap_be, val_be;
0358 
0359     cap_be = cpu_to_be32(cap);
0360     error = ar5523_cmd_read(ar, WDCMSG_TARGET_GET_CAPABILITY, &cap_be,
0361                 sizeof(cap_be), &val_be, sizeof(__be32),
0362                 AR5523_CMD_FLAG_MAGIC);
0363     if (error != 0) {
0364         ar5523_err(ar, "could not read capability %u\n", cap);
0365         return error;
0366     }
0367     *val = be32_to_cpu(val_be);
0368     return error;
0369 }
0370 
0371 static int ar5523_get_devcap(struct ar5523 *ar)
0372 {
0373 #define GETCAP(x) do {              \
0374     error = ar5523_get_capability(ar, x, &cap);     \
0375     if (error != 0)                 \
0376         return error;               \
0377     ar5523_info(ar, "Cap: "         \
0378         "%s=0x%08x\n", #x, cap);    \
0379 } while (0)
0380     int error;
0381     u32 cap;
0382 
0383     /* collect device capabilities */
0384     GETCAP(CAP_TARGET_VERSION);
0385     GETCAP(CAP_TARGET_REVISION);
0386     GETCAP(CAP_MAC_VERSION);
0387     GETCAP(CAP_MAC_REVISION);
0388     GETCAP(CAP_PHY_REVISION);
0389     GETCAP(CAP_ANALOG_5GHz_REVISION);
0390     GETCAP(CAP_ANALOG_2GHz_REVISION);
0391 
0392     GETCAP(CAP_REG_DOMAIN);
0393     GETCAP(CAP_REG_CAP_BITS);
0394     GETCAP(CAP_WIRELESS_MODES);
0395     GETCAP(CAP_CHAN_SPREAD_SUPPORT);
0396     GETCAP(CAP_COMPRESS_SUPPORT);
0397     GETCAP(CAP_BURST_SUPPORT);
0398     GETCAP(CAP_FAST_FRAMES_SUPPORT);
0399     GETCAP(CAP_CHAP_TUNING_SUPPORT);
0400     GETCAP(CAP_TURBOG_SUPPORT);
0401     GETCAP(CAP_TURBO_PRIME_SUPPORT);
0402     GETCAP(CAP_DEVICE_TYPE);
0403     GETCAP(CAP_WME_SUPPORT);
0404     GETCAP(CAP_TOTAL_QUEUES);
0405     GETCAP(CAP_CONNECTION_ID_MAX);
0406 
0407     GETCAP(CAP_LOW_5GHZ_CHAN);
0408     GETCAP(CAP_HIGH_5GHZ_CHAN);
0409     GETCAP(CAP_LOW_2GHZ_CHAN);
0410     GETCAP(CAP_HIGH_2GHZ_CHAN);
0411     GETCAP(CAP_TWICE_ANTENNAGAIN_5G);
0412     GETCAP(CAP_TWICE_ANTENNAGAIN_2G);
0413 
0414     GETCAP(CAP_CIPHER_AES_CCM);
0415     GETCAP(CAP_CIPHER_TKIP);
0416     GETCAP(CAP_MIC_TKIP);
0417     return 0;
0418 }
0419 
0420 static int ar5523_set_ledsteady(struct ar5523 *ar, int lednum, int ledmode)
0421 {
0422     struct ar5523_cmd_ledsteady led;
0423 
0424     led.lednum = cpu_to_be32(lednum);
0425     led.ledmode = cpu_to_be32(ledmode);
0426 
0427     ar5523_dbg(ar, "set %s led %s (steady)\n",
0428            (lednum == UATH_LED_LINK) ? "link" : "activity",
0429            ledmode ? "on" : "off");
0430     return ar5523_cmd_write(ar, WDCMSG_SET_LED_STEADY, &led, sizeof(led),
0431                  0);
0432 }
0433 
0434 static int ar5523_set_rxfilter(struct ar5523 *ar, u32 bits, u32 op)
0435 {
0436     struct ar5523_cmd_rx_filter rxfilter;
0437 
0438     rxfilter.bits = cpu_to_be32(bits);
0439     rxfilter.op = cpu_to_be32(op);
0440 
0441     ar5523_dbg(ar, "setting Rx filter=0x%x flags=0x%x\n", bits, op);
0442     return ar5523_cmd_write(ar, WDCMSG_RX_FILTER, &rxfilter,
0443                  sizeof(rxfilter), 0);
0444 }
0445 
0446 static int ar5523_reset_tx_queues(struct ar5523 *ar)
0447 {
0448     __be32 qid = cpu_to_be32(0);
0449 
0450     ar5523_dbg(ar, "resetting Tx queue\n");
0451     return ar5523_cmd_write(ar, WDCMSG_RELEASE_TX_QUEUE,
0452                  &qid, sizeof(qid), 0);
0453 }
0454 
0455 static int ar5523_set_chan(struct ar5523 *ar)
0456 {
0457     struct ieee80211_conf *conf = &ar->hw->conf;
0458 
0459     struct ar5523_cmd_reset reset;
0460 
0461     memset(&reset, 0, sizeof(reset));
0462     reset.flags |= cpu_to_be32(UATH_CHAN_2GHZ);
0463     reset.flags |= cpu_to_be32(UATH_CHAN_OFDM);
0464     reset.freq = cpu_to_be32(conf->chandef.chan->center_freq);
0465     reset.maxrdpower = cpu_to_be32(50); /* XXX */
0466     reset.channelchange = cpu_to_be32(1);
0467     reset.keeprccontent = cpu_to_be32(0);
0468 
0469     ar5523_dbg(ar, "set chan flags 0x%x freq %d\n",
0470            be32_to_cpu(reset.flags),
0471            conf->chandef.chan->center_freq);
0472     return ar5523_cmd_write(ar, WDCMSG_RESET, &reset, sizeof(reset), 0);
0473 }
0474 
0475 static int ar5523_queue_init(struct ar5523 *ar)
0476 {
0477     struct ar5523_cmd_txq_setup qinfo;
0478 
0479     ar5523_dbg(ar, "setting up Tx queue\n");
0480     qinfo.qid        = cpu_to_be32(0);
0481     qinfo.len        = cpu_to_be32(sizeof(qinfo.attr));
0482     qinfo.attr.priority  = cpu_to_be32(0);  /* XXX */
0483     qinfo.attr.aifs      = cpu_to_be32(3);
0484     qinfo.attr.logcwmin  = cpu_to_be32(4);
0485     qinfo.attr.logcwmax  = cpu_to_be32(10);
0486     qinfo.attr.bursttime = cpu_to_be32(0);
0487     qinfo.attr.mode      = cpu_to_be32(0);
0488     qinfo.attr.qflags    = cpu_to_be32(1);  /* XXX? */
0489     return ar5523_cmd_write(ar, WDCMSG_SETUP_TX_QUEUE, &qinfo,
0490                  sizeof(qinfo), 0);
0491 }
0492 
0493 static int ar5523_switch_chan(struct ar5523 *ar)
0494 {
0495     int error;
0496 
0497     error = ar5523_set_chan(ar);
0498     if (error) {
0499         ar5523_err(ar, "could not set chan, error %d\n", error);
0500         goto out_err;
0501     }
0502 
0503     /* reset Tx rings */
0504     error = ar5523_reset_tx_queues(ar);
0505     if (error) {
0506         ar5523_err(ar, "could not reset Tx queues, error %d\n",
0507                error);
0508         goto out_err;
0509     }
0510     /* set Tx rings WME properties */
0511     error = ar5523_queue_init(ar);
0512     if (error)
0513         ar5523_err(ar, "could not init wme, error %d\n", error);
0514 
0515 out_err:
0516     return error;
0517 }
0518 
0519 static void ar5523_rx_data_put(struct ar5523 *ar,
0520                 struct ar5523_rx_data *data)
0521 {
0522     unsigned long flags;
0523     spin_lock_irqsave(&ar->rx_data_list_lock, flags);
0524     list_move(&data->list, &ar->rx_data_free);
0525     spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
0526 }
0527 
0528 static void ar5523_data_rx_cb(struct urb *urb)
0529 {
0530     struct ar5523_rx_data *data = urb->context;
0531     struct ar5523 *ar = data->ar;
0532     struct ar5523_rx_desc *desc;
0533     struct ar5523_chunk *chunk;
0534     struct ieee80211_hw *hw = ar->hw;
0535     struct ieee80211_rx_status *rx_status;
0536     u32 rxlen;
0537     int usblen = urb->actual_length;
0538     int hdrlen, pad;
0539 
0540     ar5523_dbg(ar, "%s\n", __func__);
0541     /* sync/async unlink faults aren't errors */
0542     if (urb->status) {
0543         if (urb->status != -ESHUTDOWN)
0544             ar5523_err(ar, "%s: USB err: %d\n", __func__,
0545                    urb->status);
0546         goto skip;
0547     }
0548 
0549     if (usblen < AR5523_MIN_RXBUFSZ) {
0550         ar5523_err(ar, "RX: wrong xfer size (usblen=%d)\n", usblen);
0551         goto skip;
0552     }
0553 
0554     chunk = (struct ar5523_chunk *) data->skb->data;
0555 
0556     if (((chunk->flags & UATH_CFLAGS_FINAL) == 0) ||
0557         chunk->seqnum != 0) {
0558         ar5523_dbg(ar, "RX: No final flag. s: %d f: %02x l: %d\n",
0559                chunk->seqnum, chunk->flags,
0560                be16_to_cpu(chunk->length));
0561         goto skip;
0562     }
0563 
0564     /* Rx descriptor is located at the end, 32-bit aligned */
0565     desc = (struct ar5523_rx_desc *)
0566         (data->skb->data + usblen - sizeof(struct ar5523_rx_desc));
0567 
0568     rxlen = be32_to_cpu(desc->len);
0569     if (rxlen > ar->rxbufsz) {
0570         ar5523_dbg(ar, "RX: Bad descriptor (len=%d)\n",
0571                be32_to_cpu(desc->len));
0572         goto skip;
0573     }
0574 
0575     if (!rxlen) {
0576         ar5523_dbg(ar, "RX: rxlen is 0\n");
0577         goto skip;
0578     }
0579 
0580     if (be32_to_cpu(desc->status) != 0) {
0581         ar5523_dbg(ar, "Bad RX status (0x%x len = %d). Skip\n",
0582                be32_to_cpu(desc->status), be32_to_cpu(desc->len));
0583         goto skip;
0584     }
0585 
0586     skb_reserve(data->skb, sizeof(*chunk));
0587     skb_put(data->skb, rxlen - sizeof(struct ar5523_rx_desc));
0588 
0589     hdrlen = ieee80211_get_hdrlen_from_skb(data->skb);
0590     if (!IS_ALIGNED(hdrlen, 4)) {
0591         ar5523_dbg(ar, "eek, alignment workaround activated\n");
0592         pad = ALIGN(hdrlen, 4) - hdrlen;
0593         memmove(data->skb->data + pad, data->skb->data, hdrlen);
0594         skb_pull(data->skb, pad);
0595         skb_put(data->skb, pad);
0596     }
0597 
0598     rx_status = IEEE80211_SKB_RXCB(data->skb);
0599     memset(rx_status, 0, sizeof(*rx_status));
0600     rx_status->freq = be32_to_cpu(desc->channel);
0601     rx_status->band = hw->conf.chandef.chan->band;
0602     rx_status->signal = -95 + be32_to_cpu(desc->rssi);
0603 
0604     ieee80211_rx_irqsafe(hw, data->skb);
0605     data->skb = NULL;
0606 
0607 skip:
0608     if (data->skb) {
0609         dev_kfree_skb_irq(data->skb);
0610         data->skb = NULL;
0611     }
0612 
0613     ar5523_rx_data_put(ar, data);
0614     if (atomic_inc_return(&ar->rx_data_free_cnt) >=
0615         AR5523_RX_DATA_REFILL_COUNT &&
0616         test_bit(AR5523_HW_UP, &ar->flags))
0617         queue_work(ar->wq, &ar->rx_refill_work);
0618 }
0619 
0620 static void ar5523_rx_refill_work(struct work_struct *work)
0621 {
0622     struct ar5523 *ar = container_of(work, struct ar5523, rx_refill_work);
0623     struct ar5523_rx_data *data;
0624     unsigned long flags;
0625     int error;
0626 
0627     ar5523_dbg(ar, "%s\n", __func__);
0628     do {
0629         spin_lock_irqsave(&ar->rx_data_list_lock, flags);
0630 
0631         if (!list_empty(&ar->rx_data_free))
0632             data = (struct ar5523_rx_data *) ar->rx_data_free.next;
0633         else
0634             data = NULL;
0635         spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
0636 
0637         if (!data)
0638             goto done;
0639 
0640         data->skb = alloc_skb(ar->rxbufsz, GFP_KERNEL);
0641         if (!data->skb) {
0642             ar5523_err(ar, "could not allocate rx skbuff\n");
0643             return;
0644         }
0645 
0646         usb_fill_bulk_urb(data->urb, ar->dev,
0647                   ar5523_data_rx_pipe(ar->dev), data->skb->data,
0648                   ar->rxbufsz, ar5523_data_rx_cb, data);
0649 
0650         spin_lock_irqsave(&ar->rx_data_list_lock, flags);
0651         list_move(&data->list, &ar->rx_data_used);
0652         spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
0653         atomic_dec(&ar->rx_data_free_cnt);
0654 
0655         error = usb_submit_urb(data->urb, GFP_KERNEL);
0656         if (error) {
0657             kfree_skb(data->skb);
0658             if (error != -ENODEV)
0659                 ar5523_err(ar, "Err sending rx data urb %d\n",
0660                        error);
0661             ar5523_rx_data_put(ar, data);
0662             atomic_inc(&ar->rx_data_free_cnt);
0663             return;
0664         }
0665 
0666     } while (true);
0667 done:
0668     return;
0669 }
0670 
0671 static void ar5523_cancel_rx_bufs(struct ar5523 *ar)
0672 {
0673     struct ar5523_rx_data *data;
0674     unsigned long flags;
0675 
0676     do {
0677         spin_lock_irqsave(&ar->rx_data_list_lock, flags);
0678         if (!list_empty(&ar->rx_data_used))
0679             data = (struct ar5523_rx_data *) ar->rx_data_used.next;
0680         else
0681             data = NULL;
0682         spin_unlock_irqrestore(&ar->rx_data_list_lock, flags);
0683 
0684         if (!data)
0685             break;
0686 
0687         usb_kill_urb(data->urb);
0688         list_move(&data->list, &ar->rx_data_free);
0689         atomic_inc(&ar->rx_data_free_cnt);
0690     } while (data);
0691 }
0692 
0693 static void ar5523_free_rx_bufs(struct ar5523 *ar)
0694 {
0695     struct ar5523_rx_data *data;
0696 
0697     ar5523_cancel_rx_bufs(ar);
0698     while (!list_empty(&ar->rx_data_free)) {
0699         data = (struct ar5523_rx_data *) ar->rx_data_free.next;
0700         list_del(&data->list);
0701         usb_free_urb(data->urb);
0702     }
0703 }
0704 
0705 static int ar5523_alloc_rx_bufs(struct ar5523 *ar)
0706 {
0707     int i;
0708 
0709     for (i = 0; i < AR5523_RX_DATA_COUNT; i++) {
0710         struct ar5523_rx_data *data = &ar->rx_data[i];
0711 
0712         data->ar = ar;
0713         data->urb = usb_alloc_urb(0, GFP_KERNEL);
0714         if (!data->urb)
0715             goto err;
0716         list_add_tail(&data->list, &ar->rx_data_free);
0717         atomic_inc(&ar->rx_data_free_cnt);
0718     }
0719     return 0;
0720 
0721 err:
0722     ar5523_free_rx_bufs(ar);
0723     return -ENOMEM;
0724 }
0725 
0726 static void ar5523_data_tx_pkt_put(struct ar5523 *ar)
0727 {
0728     atomic_dec(&ar->tx_nr_total);
0729     if (!atomic_dec_return(&ar->tx_nr_pending)) {
0730         del_timer(&ar->tx_wd_timer);
0731         wake_up(&ar->tx_flush_waitq);
0732     }
0733 
0734     if (atomic_read(&ar->tx_nr_total) < AR5523_TX_DATA_RESTART_COUNT) {
0735         ar5523_dbg(ar, "restart tx queue\n");
0736         ieee80211_wake_queues(ar->hw);
0737     }
0738 }
0739 
0740 static void ar5523_data_tx_cb(struct urb *urb)
0741 {
0742     struct sk_buff *skb = urb->context;
0743     struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
0744     struct ar5523_tx_data *data = (struct ar5523_tx_data *)
0745                        txi->driver_data;
0746     struct ar5523 *ar = data->ar;
0747     unsigned long flags;
0748 
0749     ar5523_dbg(ar, "data tx urb completed: %d\n", urb->status);
0750 
0751     spin_lock_irqsave(&ar->tx_data_list_lock, flags);
0752     list_del(&data->list);
0753     spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
0754 
0755     if (urb->status) {
0756         ar5523_dbg(ar, "%s: urb status: %d\n", __func__, urb->status);
0757         ar5523_data_tx_pkt_put(ar);
0758         ieee80211_free_txskb(ar->hw, skb);
0759     } else {
0760         skb_pull(skb, sizeof(struct ar5523_tx_desc) + sizeof(__be32));
0761         ieee80211_tx_status_irqsafe(ar->hw, skb);
0762     }
0763     usb_free_urb(urb);
0764 }
0765 
0766 static void ar5523_tx(struct ieee80211_hw *hw,
0767                struct ieee80211_tx_control *control,
0768                struct sk_buff *skb)
0769 {
0770     struct ieee80211_tx_info *txi = IEEE80211_SKB_CB(skb);
0771     struct ar5523_tx_data *data = (struct ar5523_tx_data *)
0772                     txi->driver_data;
0773     struct ar5523 *ar = hw->priv;
0774     unsigned long flags;
0775 
0776     ar5523_dbg(ar, "tx called\n");
0777     if (atomic_inc_return(&ar->tx_nr_total) >= AR5523_TX_DATA_COUNT) {
0778         ar5523_dbg(ar, "tx queue full\n");
0779         ar5523_dbg(ar, "stop queues (tot %d pend %d)\n",
0780                atomic_read(&ar->tx_nr_total),
0781                atomic_read(&ar->tx_nr_pending));
0782         ieee80211_stop_queues(hw);
0783     }
0784 
0785     spin_lock_irqsave(&ar->tx_data_list_lock, flags);
0786     list_add_tail(&data->list, &ar->tx_queue_pending);
0787     spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
0788 
0789     ieee80211_queue_work(ar->hw, &ar->tx_work);
0790 }
0791 
0792 static void ar5523_tx_work_locked(struct ar5523 *ar)
0793 {
0794     struct ar5523_tx_data *data;
0795     struct ar5523_tx_desc *desc;
0796     struct ar5523_chunk *chunk;
0797     struct ieee80211_tx_info *txi;
0798     struct urb *urb;
0799     struct sk_buff *skb;
0800     int error = 0, paylen;
0801     u32 txqid;
0802     unsigned long flags;
0803 
0804     BUILD_BUG_ON(sizeof(struct ar5523_tx_data) >
0805              IEEE80211_TX_INFO_DRIVER_DATA_SIZE);
0806 
0807     ar5523_dbg(ar, "%s\n", __func__);
0808     do {
0809         spin_lock_irqsave(&ar->tx_data_list_lock, flags);
0810         if (!list_empty(&ar->tx_queue_pending)) {
0811             data = (struct ar5523_tx_data *)
0812                 ar->tx_queue_pending.next;
0813             list_del(&data->list);
0814         } else
0815             data = NULL;
0816         spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
0817 
0818         if (!data)
0819             break;
0820 
0821         txi = container_of((void *)data, struct ieee80211_tx_info,
0822                    driver_data);
0823         txqid = 0;
0824 
0825         skb = container_of((void *)txi, struct sk_buff, cb);
0826         paylen = skb->len;
0827 
0828         urb = usb_alloc_urb(0, GFP_KERNEL);
0829         if (!urb) {
0830             ieee80211_free_txskb(ar->hw, skb);
0831             continue;
0832         }
0833 
0834         data->ar = ar;
0835         data->urb = urb;
0836 
0837         desc = skb_push(skb, sizeof(*desc));
0838         chunk = skb_push(skb, sizeof(*chunk));
0839 
0840         chunk->seqnum = 0;
0841         chunk->flags = UATH_CFLAGS_FINAL;
0842         chunk->length = cpu_to_be16(skb->len);
0843 
0844         desc->msglen = cpu_to_be32(skb->len);
0845         desc->msgid  = AR5523_DATA_ID;
0846         desc->buflen = cpu_to_be32(paylen);
0847         desc->type   = cpu_to_be32(WDCMSG_SEND);
0848         desc->flags  = cpu_to_be32(UATH_TX_NOTIFY);
0849 
0850         if (test_bit(AR5523_CONNECTED, &ar->flags))
0851             desc->connid = cpu_to_be32(AR5523_ID_BSS);
0852         else
0853             desc->connid = cpu_to_be32(AR5523_ID_BROADCAST);
0854 
0855         if (txi->flags & IEEE80211_TX_CTL_USE_MINRATE)
0856             txqid |= UATH_TXQID_MINRATE;
0857 
0858         desc->txqid = cpu_to_be32(txqid);
0859 
0860         urb->transfer_flags = URB_ZERO_PACKET;
0861         usb_fill_bulk_urb(urb, ar->dev, ar5523_data_tx_pipe(ar->dev),
0862                   skb->data, skb->len, ar5523_data_tx_cb, skb);
0863 
0864         spin_lock_irqsave(&ar->tx_data_list_lock, flags);
0865         list_add_tail(&data->list, &ar->tx_queue_submitted);
0866         spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
0867         mod_timer(&ar->tx_wd_timer, jiffies + AR5523_TX_WD_TIMEOUT);
0868         atomic_inc(&ar->tx_nr_pending);
0869 
0870         ar5523_dbg(ar, "TX Frame (%d pending)\n",
0871                atomic_read(&ar->tx_nr_pending));
0872         error = usb_submit_urb(urb, GFP_KERNEL);
0873         if (error) {
0874             ar5523_err(ar, "error %d when submitting tx urb\n",
0875                    error);
0876             spin_lock_irqsave(&ar->tx_data_list_lock, flags);
0877             list_del(&data->list);
0878             spin_unlock_irqrestore(&ar->tx_data_list_lock, flags);
0879             atomic_dec(&ar->tx_nr_pending);
0880             ar5523_data_tx_pkt_put(ar);
0881             usb_free_urb(urb);
0882             ieee80211_free_txskb(ar->hw, skb);
0883         }
0884     } while (true);
0885 }
0886 
0887 static void ar5523_tx_work(struct work_struct *work)
0888 {
0889     struct ar5523 *ar = container_of(work, struct ar5523, tx_work);
0890 
0891     ar5523_dbg(ar, "%s\n", __func__);
0892     mutex_lock(&ar->mutex);
0893     ar5523_tx_work_locked(ar);
0894     mutex_unlock(&ar->mutex);
0895 }
0896 
0897 static void ar5523_tx_wd_timer(struct timer_list *t)
0898 {
0899     struct ar5523 *ar = from_timer(ar, t, tx_wd_timer);
0900 
0901     ar5523_dbg(ar, "TX watchdog timer triggered\n");
0902     ieee80211_queue_work(ar->hw, &ar->tx_wd_work);
0903 }
0904 
0905 static void ar5523_tx_wd_work(struct work_struct *work)
0906 {
0907     struct ar5523 *ar = container_of(work, struct ar5523, tx_wd_work);
0908 
0909     /* Occasionally the TX queues stop responding. The only way to
0910      * recover seems to be to reset the dongle.
0911      */
0912 
0913     mutex_lock(&ar->mutex);
0914     ar5523_err(ar, "TX queue stuck (tot %d pend %d)\n",
0915            atomic_read(&ar->tx_nr_total),
0916            atomic_read(&ar->tx_nr_pending));
0917 
0918     ar5523_err(ar, "Will restart dongle.\n");
0919     ar5523_cmd_write(ar, WDCMSG_TARGET_RESET, NULL, 0, 0);
0920     mutex_unlock(&ar->mutex);
0921 }
0922 
0923 static void ar5523_flush_tx(struct ar5523 *ar)
0924 {
0925     ar5523_tx_work_locked(ar);
0926 
0927     /* Don't waste time trying to flush if USB is disconnected */
0928     if (test_bit(AR5523_USB_DISCONNECTED, &ar->flags))
0929         return;
0930     if (!wait_event_timeout(ar->tx_flush_waitq,
0931         !atomic_read(&ar->tx_nr_pending), AR5523_FLUSH_TIMEOUT))
0932         ar5523_err(ar, "flush timeout (tot %d pend %d)\n",
0933                atomic_read(&ar->tx_nr_total),
0934                atomic_read(&ar->tx_nr_pending));
0935 }
0936 
0937 static void ar5523_free_tx_cmd(struct ar5523 *ar)
0938 {
0939     struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
0940 
0941     usb_free_coherent(ar->dev, AR5523_MAX_RXCMDSZ, cmd->buf_tx,
0942               cmd->urb_tx->transfer_dma);
0943     usb_free_urb(cmd->urb_tx);
0944 }
0945 
0946 static int ar5523_alloc_tx_cmd(struct ar5523 *ar)
0947 {
0948     struct ar5523_tx_cmd *cmd = &ar->tx_cmd;
0949 
0950     cmd->ar = ar;
0951     init_completion(&cmd->done);
0952 
0953     cmd->urb_tx = usb_alloc_urb(0, GFP_KERNEL);
0954     if (!cmd->urb_tx)
0955         return -ENOMEM;
0956     cmd->buf_tx = usb_alloc_coherent(ar->dev, AR5523_MAX_TXCMDSZ,
0957                      GFP_KERNEL,
0958                      &cmd->urb_tx->transfer_dma);
0959     if (!cmd->buf_tx) {
0960         usb_free_urb(cmd->urb_tx);
0961         return -ENOMEM;
0962     }
0963     return 0;
0964 }
0965 
0966 /*
0967  * This function is called periodically (every second) when associated to
0968  * query device statistics.
0969  */
0970 static void ar5523_stat_work(struct work_struct *work)
0971 {
0972     struct ar5523 *ar = container_of(work, struct ar5523, stat_work.work);
0973     int error;
0974 
0975     ar5523_dbg(ar, "%s\n", __func__);
0976     mutex_lock(&ar->mutex);
0977 
0978     /*
0979      * Send request for statistics asynchronously once a second. This
0980      * seems to be important. Throughput is a lot better if this is done.
0981      */
0982     error = ar5523_cmd_write(ar, WDCMSG_TARGET_GET_STATS, NULL, 0, 0);
0983     if (error)
0984         ar5523_err(ar, "could not query stats, error %d\n", error);
0985     mutex_unlock(&ar->mutex);
0986     ieee80211_queue_delayed_work(ar->hw, &ar->stat_work, HZ);
0987 }
0988 
0989 /*
0990  * Interface routines to the mac80211 stack.
0991  */
0992 static int ar5523_start(struct ieee80211_hw *hw)
0993 {
0994     struct ar5523 *ar = hw->priv;
0995     int error;
0996     __be32 val;
0997 
0998     ar5523_dbg(ar, "start called\n");
0999 
1000     mutex_lock(&ar->mutex);
1001     val = cpu_to_be32(0);
1002     ar5523_cmd_write(ar, WDCMSG_BIND, &val, sizeof(val), 0);
1003 
1004     /* set MAC address */
1005     ar5523_config_multi(ar, CFG_MAC_ADDR, &ar->hw->wiphy->perm_addr,
1006                 ETH_ALEN);
1007 
1008     /* XXX honor net80211 state */
1009     ar5523_config(ar, CFG_RATE_CONTROL_ENABLE, 0x00000001);
1010     ar5523_config(ar, CFG_DIVERSITY_CTL, 0x00000001);
1011     ar5523_config(ar, CFG_ABOLT, 0x0000003f);
1012     ar5523_config(ar, CFG_WME_ENABLED, 0x00000000);
1013 
1014     ar5523_config(ar, CFG_SERVICE_TYPE, 1);
1015     ar5523_config(ar, CFG_TP_SCALE, 0x00000000);
1016     ar5523_config(ar, CFG_TPC_HALF_DBM5, 0x0000003c);
1017     ar5523_config(ar, CFG_TPC_HALF_DBM2, 0x0000003c);
1018     ar5523_config(ar, CFG_OVERRD_TX_POWER, 0x00000000);
1019     ar5523_config(ar, CFG_GMODE_PROTECTION, 0x00000000);
1020     ar5523_config(ar, CFG_GMODE_PROTECT_RATE_INDEX, 0x00000003);
1021     ar5523_config(ar, CFG_PROTECTION_TYPE, 0x00000000);
1022     ar5523_config(ar, CFG_MODE_CTS, 0x00000002);
1023 
1024     error = ar5523_cmd_read(ar, WDCMSG_TARGET_START, NULL, 0,
1025         &val, sizeof(val), AR5523_CMD_FLAG_MAGIC);
1026     if (error) {
1027         ar5523_dbg(ar, "could not start target, error %d\n", error);
1028         goto err;
1029     }
1030     ar5523_dbg(ar, "WDCMSG_TARGET_START returns handle: 0x%x\n",
1031            be32_to_cpu(val));
1032 
1033     ar5523_switch_chan(ar);
1034 
1035     val = cpu_to_be32(TARGET_DEVICE_AWAKE);
1036     ar5523_cmd_write(ar, WDCMSG_SET_PWR_MODE, &val, sizeof(val), 0);
1037     /* XXX? check */
1038     ar5523_cmd_write(ar, WDCMSG_RESET_KEY_CACHE, NULL, 0, 0);
1039 
1040     set_bit(AR5523_HW_UP, &ar->flags);
1041     queue_work(ar->wq, &ar->rx_refill_work);
1042 
1043     /* enable Rx */
1044     ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1045     ar5523_set_rxfilter(ar,
1046                 UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1047                 UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON,
1048                 UATH_FILTER_OP_SET);
1049 
1050     ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_ON);
1051     ar5523_dbg(ar, "start OK\n");
1052 
1053 err:
1054     mutex_unlock(&ar->mutex);
1055     return error;
1056 }
1057 
1058 static void ar5523_stop(struct ieee80211_hw *hw)
1059 {
1060     struct ar5523 *ar = hw->priv;
1061 
1062     ar5523_dbg(ar, "stop called\n");
1063 
1064     cancel_delayed_work_sync(&ar->stat_work);
1065     mutex_lock(&ar->mutex);
1066     clear_bit(AR5523_HW_UP, &ar->flags);
1067 
1068     ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1069     ar5523_set_ledsteady(ar, UATH_LED_ACTIVITY, UATH_LED_OFF);
1070 
1071     ar5523_cmd_write(ar, WDCMSG_TARGET_STOP, NULL, 0, 0);
1072 
1073     del_timer_sync(&ar->tx_wd_timer);
1074     cancel_work_sync(&ar->tx_wd_work);
1075     cancel_work_sync(&ar->rx_refill_work);
1076     ar5523_cancel_rx_bufs(ar);
1077     mutex_unlock(&ar->mutex);
1078 }
1079 
1080 static int ar5523_set_rts_threshold(struct ieee80211_hw *hw, u32 value)
1081 {
1082     struct ar5523 *ar = hw->priv;
1083     int ret;
1084 
1085     ar5523_dbg(ar, "set_rts_threshold called\n");
1086     mutex_lock(&ar->mutex);
1087 
1088     ret = ar5523_config(ar, CFG_USER_RTS_THRESHOLD, value);
1089 
1090     mutex_unlock(&ar->mutex);
1091     return ret;
1092 }
1093 
1094 static void ar5523_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
1095              u32 queues, bool drop)
1096 {
1097     struct ar5523 *ar = hw->priv;
1098 
1099     ar5523_dbg(ar, "flush called\n");
1100     ar5523_flush_tx(ar);
1101 }
1102 
1103 static int ar5523_add_interface(struct ieee80211_hw *hw,
1104                 struct ieee80211_vif *vif)
1105 {
1106     struct ar5523 *ar = hw->priv;
1107 
1108     ar5523_dbg(ar, "add interface called\n");
1109 
1110     if (ar->vif) {
1111         ar5523_dbg(ar, "invalid add_interface\n");
1112         return -EOPNOTSUPP;
1113     }
1114 
1115     switch (vif->type) {
1116     case NL80211_IFTYPE_STATION:
1117         ar->vif = vif;
1118         break;
1119     default:
1120         return -EOPNOTSUPP;
1121     }
1122     return 0;
1123 }
1124 
1125 static void ar5523_remove_interface(struct ieee80211_hw *hw,
1126                     struct ieee80211_vif *vif)
1127 {
1128     struct ar5523 *ar = hw->priv;
1129 
1130     ar5523_dbg(ar, "remove interface called\n");
1131     ar->vif = NULL;
1132 }
1133 
1134 static int ar5523_hwconfig(struct ieee80211_hw *hw, u32 changed)
1135 {
1136     struct ar5523 *ar = hw->priv;
1137 
1138     ar5523_dbg(ar, "config called\n");
1139     mutex_lock(&ar->mutex);
1140     if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
1141         ar5523_dbg(ar, "Do channel switch\n");
1142         ar5523_flush_tx(ar);
1143         ar5523_switch_chan(ar);
1144     }
1145     mutex_unlock(&ar->mutex);
1146     return 0;
1147 }
1148 
1149 static int ar5523_get_wlan_mode(struct ar5523 *ar,
1150                 struct ieee80211_bss_conf *bss_conf)
1151 {
1152     struct ieee80211_supported_band *band;
1153     int bit;
1154     struct ieee80211_sta *sta;
1155     u32 sta_rate_set;
1156 
1157     band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1158     sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1159     if (!sta) {
1160         ar5523_info(ar, "STA not found!\n");
1161         return WLAN_MODE_11b;
1162     }
1163     sta_rate_set = sta->deflink.supp_rates[ar->hw->conf.chandef.chan->band];
1164 
1165     for (bit = 0; bit < band->n_bitrates; bit++) {
1166         if (sta_rate_set & 1) {
1167             int rate = band->bitrates[bit].bitrate;
1168             switch (rate) {
1169             case 60:
1170             case 90:
1171             case 120:
1172             case 180:
1173             case 240:
1174             case 360:
1175             case 480:
1176             case 540:
1177                 return WLAN_MODE_11g;
1178             }
1179         }
1180         sta_rate_set >>= 1;
1181     }
1182     return WLAN_MODE_11b;
1183 }
1184 
1185 static void ar5523_create_rateset(struct ar5523 *ar,
1186                   struct ieee80211_bss_conf *bss_conf,
1187                   struct ar5523_cmd_rateset *rs,
1188                   bool basic)
1189 {
1190     struct ieee80211_supported_band *band;
1191     struct ieee80211_sta *sta;
1192     int bit, i = 0;
1193     u32 sta_rate_set, basic_rate_set;
1194 
1195     sta = ieee80211_find_sta(ar->vif, bss_conf->bssid);
1196     basic_rate_set = bss_conf->basic_rates;
1197     if (!sta) {
1198         ar5523_info(ar, "STA not found. Cannot set rates\n");
1199         sta_rate_set = bss_conf->basic_rates;
1200     } else
1201         sta_rate_set = sta->deflink.supp_rates[ar->hw->conf.chandef.chan->band];
1202 
1203     ar5523_dbg(ar, "sta rate_set = %08x\n", sta_rate_set);
1204 
1205     band = ar->hw->wiphy->bands[ar->hw->conf.chandef.chan->band];
1206     for (bit = 0; bit < band->n_bitrates; bit++) {
1207         BUG_ON(i >= AR5523_MAX_NRATES);
1208         ar5523_dbg(ar, "Considering rate %d : %d\n",
1209                band->bitrates[bit].hw_value, sta_rate_set & 1);
1210         if (sta_rate_set & 1) {
1211             rs->set[i] = band->bitrates[bit].hw_value;
1212             if (basic_rate_set & 1 && basic)
1213                 rs->set[i] |= 0x80;
1214             i++;
1215         }
1216         sta_rate_set >>= 1;
1217         basic_rate_set >>= 1;
1218     }
1219 
1220     rs->length = i;
1221 }
1222 
1223 static int ar5523_set_basic_rates(struct ar5523 *ar,
1224                   struct ieee80211_bss_conf *bss)
1225 {
1226     struct ar5523_cmd_rates rates;
1227 
1228     memset(&rates, 0, sizeof(rates));
1229     rates.connid = cpu_to_be32(2);      /* XXX */
1230     rates.size   = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1231     ar5523_create_rateset(ar, bss, &rates.rateset, true);
1232 
1233     return ar5523_cmd_write(ar, WDCMSG_SET_BASIC_RATE, &rates,
1234                 sizeof(rates), 0);
1235 }
1236 
1237 static int ar5523_create_connection(struct ar5523 *ar,
1238                     struct ieee80211_vif *vif,
1239                     struct ieee80211_bss_conf *bss)
1240 {
1241     struct ar5523_cmd_create_connection create;
1242     int wlan_mode;
1243 
1244     memset(&create, 0, sizeof(create));
1245     create.connid = cpu_to_be32(2);
1246     create.bssid = cpu_to_be32(0);
1247     /* XXX packed or not?  */
1248     create.size = cpu_to_be32(sizeof(struct ar5523_cmd_rateset));
1249 
1250     ar5523_create_rateset(ar, bss, &create.connattr.rateset, false);
1251 
1252     wlan_mode = ar5523_get_wlan_mode(ar, bss);
1253     create.connattr.wlanmode = cpu_to_be32(wlan_mode);
1254 
1255     return ar5523_cmd_write(ar, WDCMSG_CREATE_CONNECTION, &create,
1256                 sizeof(create), 0);
1257 }
1258 
1259 static int ar5523_write_associd(struct ar5523 *ar, struct ieee80211_vif *vif)
1260 {
1261     struct ieee80211_bss_conf *bss = &vif->bss_conf;
1262     struct ar5523_cmd_set_associd associd;
1263 
1264     memset(&associd, 0, sizeof(associd));
1265     associd.defaultrateix = cpu_to_be32(0); /* XXX */
1266     associd.associd = cpu_to_be32(vif->cfg.aid);
1267     associd.timoffset = cpu_to_be32(0x3b);  /* XXX */
1268     memcpy(associd.bssid, bss->bssid, ETH_ALEN);
1269     return ar5523_cmd_write(ar, WDCMSG_WRITE_ASSOCID, &associd,
1270                 sizeof(associd), 0);
1271 }
1272 
1273 static void ar5523_bss_info_changed(struct ieee80211_hw *hw,
1274                     struct ieee80211_vif *vif,
1275                     struct ieee80211_bss_conf *bss,
1276                     u64 changed)
1277 {
1278     struct ar5523 *ar = hw->priv;
1279     int error;
1280 
1281     ar5523_dbg(ar, "bss_info_changed called\n");
1282     mutex_lock(&ar->mutex);
1283 
1284     if (!(changed & BSS_CHANGED_ASSOC))
1285         goto out_unlock;
1286 
1287     if (vif->cfg.assoc) {
1288         error = ar5523_create_connection(ar, vif, bss);
1289         if (error) {
1290             ar5523_err(ar, "could not create connection\n");
1291             goto out_unlock;
1292         }
1293 
1294         error = ar5523_set_basic_rates(ar, bss);
1295         if (error) {
1296             ar5523_err(ar, "could not set negotiated rate set\n");
1297             goto out_unlock;
1298         }
1299 
1300         error = ar5523_write_associd(ar, vif);
1301         if (error) {
1302             ar5523_err(ar, "could not set association\n");
1303             goto out_unlock;
1304         }
1305 
1306         /* turn link LED on */
1307         ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_ON);
1308         set_bit(AR5523_CONNECTED, &ar->flags);
1309         ieee80211_queue_delayed_work(hw, &ar->stat_work, HZ);
1310 
1311     } else {
1312         cancel_delayed_work(&ar->stat_work);
1313         clear_bit(AR5523_CONNECTED, &ar->flags);
1314         ar5523_set_ledsteady(ar, UATH_LED_LINK, UATH_LED_OFF);
1315     }
1316 
1317 out_unlock:
1318     mutex_unlock(&ar->mutex);
1319 
1320 }
1321 
1322 #define AR5523_SUPPORTED_FILTERS (FIF_ALLMULTI | \
1323                   FIF_FCSFAIL | \
1324                   FIF_OTHER_BSS)
1325 
1326 static void ar5523_configure_filter(struct ieee80211_hw *hw,
1327                     unsigned int changed_flags,
1328                     unsigned int *total_flags,
1329                     u64 multicast)
1330 {
1331     struct ar5523 *ar = hw->priv;
1332     u32 filter = 0;
1333 
1334     ar5523_dbg(ar, "configure_filter called\n");
1335     mutex_lock(&ar->mutex);
1336     ar5523_flush_tx(ar);
1337 
1338     *total_flags &= AR5523_SUPPORTED_FILTERS;
1339 
1340     /* The filters seems strange. UATH_FILTER_RX_BCAST and
1341      * UATH_FILTER_RX_MCAST does not result in those frames being RXed.
1342      * The only way I have found to get [mb]cast frames seems to be
1343      * to set UATH_FILTER_RX_PROM. */
1344     filter |= UATH_FILTER_RX_UCAST | UATH_FILTER_RX_MCAST |
1345           UATH_FILTER_RX_BCAST | UATH_FILTER_RX_BEACON |
1346           UATH_FILTER_RX_PROM;
1347 
1348     ar5523_set_rxfilter(ar, 0, UATH_FILTER_OP_INIT);
1349     ar5523_set_rxfilter(ar, filter, UATH_FILTER_OP_SET);
1350 
1351     mutex_unlock(&ar->mutex);
1352 }
1353 
1354 static const struct ieee80211_ops ar5523_ops = {
1355     .start          = ar5523_start,
1356     .stop           = ar5523_stop,
1357     .tx         = ar5523_tx,
1358     .set_rts_threshold  = ar5523_set_rts_threshold,
1359     .add_interface      = ar5523_add_interface,
1360     .remove_interface   = ar5523_remove_interface,
1361     .config         = ar5523_hwconfig,
1362     .bss_info_changed   = ar5523_bss_info_changed,
1363     .configure_filter   = ar5523_configure_filter,
1364     .flush          = ar5523_flush,
1365 };
1366 
1367 static int ar5523_host_available(struct ar5523 *ar)
1368 {
1369     struct ar5523_cmd_host_available setup;
1370 
1371     /* inform target the host is available */
1372     setup.sw_ver_major = cpu_to_be32(ATH_SW_VER_MAJOR);
1373     setup.sw_ver_minor = cpu_to_be32(ATH_SW_VER_MINOR);
1374     setup.sw_ver_patch = cpu_to_be32(ATH_SW_VER_PATCH);
1375     setup.sw_ver_build = cpu_to_be32(ATH_SW_VER_BUILD);
1376     return ar5523_cmd_read(ar, WDCMSG_HOST_AVAILABLE,
1377                    &setup, sizeof(setup), NULL, 0, 0);
1378 }
1379 
1380 static int ar5523_get_devstatus(struct ar5523 *ar)
1381 {
1382     u8 macaddr[ETH_ALEN];
1383     int error;
1384 
1385     /* retrieve MAC address */
1386     error = ar5523_get_status(ar, ST_MAC_ADDR, macaddr, ETH_ALEN);
1387     if (error) {
1388         ar5523_err(ar, "could not read MAC address\n");
1389         return error;
1390     }
1391 
1392     SET_IEEE80211_PERM_ADDR(ar->hw, macaddr);
1393 
1394     error = ar5523_get_status(ar, ST_SERIAL_NUMBER,
1395         &ar->serial[0], sizeof(ar->serial));
1396     if (error) {
1397         ar5523_err(ar, "could not read device serial number\n");
1398         return error;
1399     }
1400     return 0;
1401 }
1402 
1403 #define AR5523_SANE_RXBUFSZ 2000
1404 
1405 static int ar5523_get_max_rxsz(struct ar5523 *ar)
1406 {
1407     int error;
1408     __be32 rxsize;
1409 
1410     /* Get max rx size */
1411     error = ar5523_get_status(ar, ST_WDC_TRANSPORT_CHUNK_SIZE, &rxsize,
1412                   sizeof(rxsize));
1413     if (error != 0) {
1414         ar5523_err(ar, "could not read max RX size\n");
1415         return error;
1416     }
1417 
1418     ar->rxbufsz = be32_to_cpu(rxsize);
1419 
1420     if (!ar->rxbufsz || ar->rxbufsz > AR5523_SANE_RXBUFSZ) {
1421         ar5523_err(ar, "Bad rxbufsz from device. Using %d instead\n",
1422                AR5523_SANE_RXBUFSZ);
1423         ar->rxbufsz = AR5523_SANE_RXBUFSZ;
1424     }
1425 
1426     ar5523_dbg(ar, "Max RX buf size: %d\n", ar->rxbufsz);
1427     return 0;
1428 }
1429 
1430 /*
1431  * This is copied from rtl818x, but we should probably move this
1432  * to common code as in OpenBSD.
1433  */
1434 static const struct ieee80211_rate ar5523_rates[] = {
1435     { .bitrate = 10, .hw_value = 2, },
1436     { .bitrate = 20, .hw_value = 4 },
1437     { .bitrate = 55, .hw_value = 11, },
1438     { .bitrate = 110, .hw_value = 22, },
1439     { .bitrate = 60, .hw_value = 12, },
1440     { .bitrate = 90, .hw_value = 18, },
1441     { .bitrate = 120, .hw_value = 24, },
1442     { .bitrate = 180, .hw_value = 36, },
1443     { .bitrate = 240, .hw_value = 48, },
1444     { .bitrate = 360, .hw_value = 72, },
1445     { .bitrate = 480, .hw_value = 96, },
1446     { .bitrate = 540, .hw_value = 108, },
1447 };
1448 
1449 static const struct ieee80211_channel ar5523_channels[] = {
1450     { .center_freq = 2412 },
1451     { .center_freq = 2417 },
1452     { .center_freq = 2422 },
1453     { .center_freq = 2427 },
1454     { .center_freq = 2432 },
1455     { .center_freq = 2437 },
1456     { .center_freq = 2442 },
1457     { .center_freq = 2447 },
1458     { .center_freq = 2452 },
1459     { .center_freq = 2457 },
1460     { .center_freq = 2462 },
1461     { .center_freq = 2467 },
1462     { .center_freq = 2472 },
1463     { .center_freq = 2484 },
1464 };
1465 
1466 static int ar5523_init_modes(struct ar5523 *ar)
1467 {
1468     BUILD_BUG_ON(sizeof(ar->channels) != sizeof(ar5523_channels));
1469     BUILD_BUG_ON(sizeof(ar->rates) != sizeof(ar5523_rates));
1470 
1471     memcpy(ar->channels, ar5523_channels, sizeof(ar5523_channels));
1472     memcpy(ar->rates, ar5523_rates, sizeof(ar5523_rates));
1473 
1474     ar->band.band = NL80211_BAND_2GHZ;
1475     ar->band.channels = ar->channels;
1476     ar->band.n_channels = ARRAY_SIZE(ar5523_channels);
1477     ar->band.bitrates = ar->rates;
1478     ar->band.n_bitrates = ARRAY_SIZE(ar5523_rates);
1479     ar->hw->wiphy->bands[NL80211_BAND_2GHZ] = &ar->band;
1480     return 0;
1481 }
1482 
1483 /*
1484  * Load the MIPS R4000 microcode into the device.  Once the image is loaded,
1485  * the device will detach itself from the bus and reattach later with a new
1486  * product Id (a la ezusb).
1487  */
1488 static int ar5523_load_firmware(struct usb_device *dev)
1489 {
1490     struct ar5523_fwblock *txblock, *rxblock;
1491     const struct firmware *fw;
1492     void *fwbuf;
1493     int len, offset;
1494     int foolen; /* XXX(hch): handle short transfers */
1495     int error = -ENXIO;
1496 
1497     if (request_firmware(&fw, AR5523_FIRMWARE_FILE, &dev->dev)) {
1498         dev_err(&dev->dev, "no firmware found: %s\n",
1499             AR5523_FIRMWARE_FILE);
1500         return -ENOENT;
1501     }
1502 
1503     txblock = kzalloc(sizeof(*txblock), GFP_KERNEL);
1504     if (!txblock)
1505         goto out;
1506 
1507     rxblock = kmalloc(sizeof(*rxblock), GFP_KERNEL);
1508     if (!rxblock)
1509         goto out_free_txblock;
1510 
1511     fwbuf = kmalloc(AR5523_MAX_FWBLOCK_SIZE, GFP_KERNEL);
1512     if (!fwbuf)
1513         goto out_free_rxblock;
1514 
1515     txblock->flags = cpu_to_be32(AR5523_WRITE_BLOCK);
1516     txblock->total = cpu_to_be32(fw->size);
1517 
1518     offset = 0;
1519     len = fw->size;
1520     while (len > 0) {
1521         int mlen = min(len, AR5523_MAX_FWBLOCK_SIZE);
1522 
1523         txblock->remain = cpu_to_be32(len - mlen);
1524         txblock->len = cpu_to_be32(mlen);
1525 
1526         /* send firmware block meta-data */
1527         error = usb_bulk_msg(dev, ar5523_cmd_tx_pipe(dev),
1528                      txblock, sizeof(*txblock), &foolen,
1529                      AR5523_CMD_TIMEOUT);
1530         if (error) {
1531             dev_err(&dev->dev,
1532                 "could not send firmware block info\n");
1533             goto out_free_fwbuf;
1534         }
1535 
1536         /* send firmware block data */
1537         memcpy(fwbuf, fw->data + offset, mlen);
1538         error = usb_bulk_msg(dev, ar5523_data_tx_pipe(dev),
1539                      fwbuf, mlen, &foolen,
1540                      AR5523_DATA_TIMEOUT);
1541         if (error) {
1542             dev_err(&dev->dev,
1543                 "could not send firmware block data\n");
1544             goto out_free_fwbuf;
1545         }
1546 
1547         /* wait for ack from firmware */
1548         error = usb_bulk_msg(dev, ar5523_cmd_rx_pipe(dev),
1549                      rxblock, sizeof(*rxblock), &foolen,
1550                      AR5523_CMD_TIMEOUT);
1551         if (error) {
1552             dev_err(&dev->dev,
1553                 "could not read firmware answer\n");
1554             goto out_free_fwbuf;
1555         }
1556 
1557         len -= mlen;
1558         offset += mlen;
1559     }
1560 
1561     /*
1562      * Set the error to -ENXIO to make sure we continue probing for
1563      * a driver.
1564      */
1565     error = -ENXIO;
1566 
1567  out_free_fwbuf:
1568     kfree(fwbuf);
1569  out_free_rxblock:
1570     kfree(rxblock);
1571  out_free_txblock:
1572     kfree(txblock);
1573  out:
1574     release_firmware(fw);
1575     return error;
1576 }
1577 
1578 static int ar5523_probe(struct usb_interface *intf,
1579             const struct usb_device_id *id)
1580 {
1581     struct usb_device *dev = interface_to_usbdev(intf);
1582     struct ieee80211_hw *hw;
1583     struct ar5523 *ar;
1584     int error = -ENOMEM;
1585 
1586     /*
1587      * Load firmware if the device requires it.  This will return
1588      * -ENXIO on success and we'll get called back afer the usb
1589      * id changes to indicate that the firmware is present.
1590      */
1591     if (id->driver_info & AR5523_FLAG_PRE_FIRMWARE)
1592         return ar5523_load_firmware(dev);
1593 
1594 
1595     hw = ieee80211_alloc_hw(sizeof(*ar), &ar5523_ops);
1596     if (!hw)
1597         goto out;
1598     SET_IEEE80211_DEV(hw, &intf->dev);
1599 
1600     ar = hw->priv;
1601     ar->hw = hw;
1602     ar->dev = dev;
1603     mutex_init(&ar->mutex);
1604 
1605     INIT_DELAYED_WORK(&ar->stat_work, ar5523_stat_work);
1606     timer_setup(&ar->tx_wd_timer, ar5523_tx_wd_timer, 0);
1607     INIT_WORK(&ar->tx_wd_work, ar5523_tx_wd_work);
1608     INIT_WORK(&ar->tx_work, ar5523_tx_work);
1609     INIT_LIST_HEAD(&ar->tx_queue_pending);
1610     INIT_LIST_HEAD(&ar->tx_queue_submitted);
1611     spin_lock_init(&ar->tx_data_list_lock);
1612     atomic_set(&ar->tx_nr_total, 0);
1613     atomic_set(&ar->tx_nr_pending, 0);
1614     init_waitqueue_head(&ar->tx_flush_waitq);
1615 
1616     atomic_set(&ar->rx_data_free_cnt, 0);
1617     INIT_WORK(&ar->rx_refill_work, ar5523_rx_refill_work);
1618     INIT_LIST_HEAD(&ar->rx_data_free);
1619     INIT_LIST_HEAD(&ar->rx_data_used);
1620     spin_lock_init(&ar->rx_data_list_lock);
1621 
1622     ar->wq = create_singlethread_workqueue("ar5523");
1623     if (!ar->wq) {
1624         ar5523_err(ar, "Could not create wq\n");
1625         goto out_free_ar;
1626     }
1627 
1628     error = ar5523_alloc_rx_bufs(ar);
1629     if (error) {
1630         ar5523_err(ar, "Could not allocate rx buffers\n");
1631         goto out_free_wq;
1632     }
1633 
1634     error = ar5523_alloc_rx_cmd(ar);
1635     if (error) {
1636         ar5523_err(ar, "Could not allocate rx command buffers\n");
1637         goto out_free_rx_bufs;
1638     }
1639 
1640     error = ar5523_alloc_tx_cmd(ar);
1641     if (error) {
1642         ar5523_err(ar, "Could not allocate tx command buffers\n");
1643         goto out_free_rx_cmd;
1644     }
1645 
1646     error = ar5523_submit_rx_cmd(ar);
1647     if (error) {
1648         ar5523_err(ar, "Failed to submit rx cmd\n");
1649         goto out_free_tx_cmd;
1650     }
1651 
1652     /*
1653      * We're now ready to send/receive firmware commands.
1654      */
1655     error = ar5523_host_available(ar);
1656     if (error) {
1657         ar5523_err(ar, "could not initialize adapter\n");
1658         goto out_cancel_rx_cmd;
1659     }
1660 
1661     error = ar5523_get_max_rxsz(ar);
1662     if (error) {
1663         ar5523_err(ar, "could not get caps from adapter\n");
1664         goto out_cancel_rx_cmd;
1665     }
1666 
1667     error = ar5523_get_devcap(ar);
1668     if (error) {
1669         ar5523_err(ar, "could not get caps from adapter\n");
1670         goto out_cancel_rx_cmd;
1671     }
1672 
1673     error = ar5523_get_devstatus(ar);
1674     if (error != 0) {
1675         ar5523_err(ar, "could not get device status\n");
1676         goto out_cancel_rx_cmd;
1677     }
1678 
1679     ar5523_info(ar, "MAC/BBP AR5523, RF AR%c112\n",
1680             (id->driver_info & AR5523_FLAG_ABG) ? '5' : '2');
1681 
1682     ar->vif = NULL;
1683     ieee80211_hw_set(hw, HAS_RATE_CONTROL);
1684     ieee80211_hw_set(hw, RX_INCLUDES_FCS);
1685     ieee80211_hw_set(hw, SIGNAL_DBM);
1686     hw->extra_tx_headroom = sizeof(struct ar5523_tx_desc) +
1687                 sizeof(struct ar5523_chunk);
1688     hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
1689     hw->queues = 1;
1690 
1691     error = ar5523_init_modes(ar);
1692     if (error)
1693         goto out_cancel_rx_cmd;
1694 
1695     wiphy_ext_feature_set(hw->wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
1696 
1697     usb_set_intfdata(intf, hw);
1698 
1699     error = ieee80211_register_hw(hw);
1700     if (error) {
1701         ar5523_err(ar, "could not register device\n");
1702         goto out_cancel_rx_cmd;
1703     }
1704 
1705     ar5523_info(ar, "Found and initialized AR5523 device\n");
1706     return 0;
1707 
1708 out_cancel_rx_cmd:
1709     ar5523_cancel_rx_cmd(ar);
1710 out_free_tx_cmd:
1711     ar5523_free_tx_cmd(ar);
1712 out_free_rx_cmd:
1713     ar5523_free_rx_cmd(ar);
1714 out_free_rx_bufs:
1715     ar5523_free_rx_bufs(ar);
1716 out_free_wq:
1717     destroy_workqueue(ar->wq);
1718 out_free_ar:
1719     ieee80211_free_hw(hw);
1720 out:
1721     return error;
1722 }
1723 
1724 static void ar5523_disconnect(struct usb_interface *intf)
1725 {
1726     struct ieee80211_hw *hw = usb_get_intfdata(intf);
1727     struct ar5523 *ar = hw->priv;
1728 
1729     ar5523_dbg(ar, "detaching\n");
1730     set_bit(AR5523_USB_DISCONNECTED, &ar->flags);
1731 
1732     ieee80211_unregister_hw(hw);
1733 
1734     ar5523_cancel_rx_cmd(ar);
1735     ar5523_free_tx_cmd(ar);
1736     ar5523_free_rx_cmd(ar);
1737     ar5523_free_rx_bufs(ar);
1738 
1739     destroy_workqueue(ar->wq);
1740 
1741     ieee80211_free_hw(hw);
1742     usb_set_intfdata(intf, NULL);
1743 }
1744 
1745 #define AR5523_DEVICE_UG(vendor, device) \
1746     { USB_DEVICE((vendor), (device)) }, \
1747     { USB_DEVICE((vendor), (device) + 1), \
1748         .driver_info = AR5523_FLAG_PRE_FIRMWARE }
1749 #define AR5523_DEVICE_UX(vendor, device) \
1750     { USB_DEVICE((vendor), (device)), \
1751         .driver_info = AR5523_FLAG_ABG }, \
1752     { USB_DEVICE((vendor), (device) + 1), \
1753         .driver_info = AR5523_FLAG_ABG|AR5523_FLAG_PRE_FIRMWARE }
1754 
1755 static const struct usb_device_id ar5523_id_table[] = {
1756     AR5523_DEVICE_UG(0x168c, 0x0001),   /* Atheros / AR5523 */
1757     AR5523_DEVICE_UG(0x0cf3, 0x0001),   /* Atheros2 / AR5523_1 */
1758     AR5523_DEVICE_UG(0x0cf3, 0x0003),   /* Atheros2 / AR5523_2 */
1759     AR5523_DEVICE_UX(0x0cf3, 0x0005),   /* Atheros2 / AR5523_3 */
1760     AR5523_DEVICE_UG(0x0d8e, 0x7801),   /* Conceptronic / AR5523_1 */
1761     AR5523_DEVICE_UX(0x0d8e, 0x7811),   /* Conceptronic / AR5523_2 */
1762     AR5523_DEVICE_UX(0x2001, 0x3a00),   /* Dlink / DWLAG132 */
1763     AR5523_DEVICE_UG(0x2001, 0x3a02),   /* Dlink / DWLG132 */
1764     AR5523_DEVICE_UX(0x2001, 0x3a04),   /* Dlink / DWLAG122 */
1765     AR5523_DEVICE_UG(0x07d1, 0x3a07),   /* D-Link / WUA-2340 rev A1 */
1766     AR5523_DEVICE_UG(0x1690, 0x0712),   /* Gigaset / AR5523 */
1767     AR5523_DEVICE_UG(0x1690, 0x0710),   /* Gigaset / SMCWUSBTG */
1768     AR5523_DEVICE_UG(0x129b, 0x160b),   /* Gigaset / USB stick 108
1769                            (CyberTAN Technology) */
1770     AR5523_DEVICE_UG(0x16ab, 0x7801),   /* Globalsun / AR5523_1 */
1771     AR5523_DEVICE_UX(0x16ab, 0x7811),   /* Globalsun / AR5523_2 */
1772     AR5523_DEVICE_UG(0x0d8e, 0x7802),   /* Globalsun / AR5523_3 */
1773     AR5523_DEVICE_UX(0x0846, 0x4300),   /* Netgear / WG111U */
1774     AR5523_DEVICE_UG(0x0846, 0x4250),   /* Netgear / WG111T */
1775     AR5523_DEVICE_UG(0x0846, 0x5f00),   /* Netgear / WPN111 */
1776     AR5523_DEVICE_UG(0x083a, 0x4506),   /* SMC / EZ Connect
1777                            SMCWUSBT-G2 */
1778     AR5523_DEVICE_UG(0x157e, 0x3006),   /* Umedia / AR5523_1, TEW444UBEU*/
1779     AR5523_DEVICE_UX(0x157e, 0x3205),   /* Umedia / AR5523_2 */
1780     AR5523_DEVICE_UG(0x1435, 0x0826),   /* Wistronneweb / AR5523_1 */
1781     AR5523_DEVICE_UX(0x1435, 0x0828),   /* Wistronneweb / AR5523_2 */
1782     AR5523_DEVICE_UG(0x0cde, 0x0012),   /* Zcom / AR5523 */
1783     AR5523_DEVICE_UG(0x1385, 0x4250),   /* Netgear3 / WG111T (2) */
1784     AR5523_DEVICE_UG(0x1385, 0x5f00),   /* Netgear / WPN111 */
1785     AR5523_DEVICE_UG(0x1385, 0x5f02),   /* Netgear / WPN111 */
1786     { }
1787 };
1788 MODULE_DEVICE_TABLE(usb, ar5523_id_table);
1789 
1790 static struct usb_driver ar5523_driver = {
1791     .name       = "ar5523",
1792     .id_table   = ar5523_id_table,
1793     .probe      = ar5523_probe,
1794     .disconnect = ar5523_disconnect,
1795 };
1796 
1797 module_usb_driver(ar5523_driver);
1798 
1799 MODULE_LICENSE("Dual BSD/GPL");
1800 MODULE_FIRMWARE(AR5523_FIRMWARE_FILE);
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