drivers/net/wireless/atmel/at76c50x-usb.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * at76c503/at76c505 USB driver
   4  *
   5  * Copyright (c) 2002 - 2003 Oliver Kurth
   6  * Copyright (c) 2004 Joerg Albert <[email protected]>
   7  * Copyright (c) 2004 Nick Jones
   8  * Copyright (c) 2004 Balint Seeber <[email protected]>
   9  * Copyright (c) 2007 Guido Guenther <[email protected]>
  10  * Copyright (c) 2007 Kalle Valo <[email protected]>
  11  * Copyright (c) 2010 Sebastian Smolorz <[email protected]>
  12  *
  13  * This file is part of the Berlios driver for WLAN USB devices based on the
  14  * Atmel AT76C503A/505/505A.
  15  *
  16  * Some iw_handler code was taken from airo.c, (C) 1999 Benjamin Reed
  17  *
  18  * TODO list is at the wiki:
  19  *
  20  * https://wireless.wiki.kernel.org/en/users/Drivers/at76c50x-usb#TODO
  21  */
  22
  23 #include <linux/init.h>
  24 #include <linux/kernel.h>
  25 #include <linux/sched.h>
  26 #include <linux/errno.h>
  27 #include <linux/slab.h>
  28 #include <linux/module.h>
  29 #include <linux/spinlock.h>
  30 #include <linux/list.h>
  31 #include <linux/usb.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/if_arp.h>
  34 #include <linux/etherdevice.h>
  35 #include <linux/ethtool.h>
  36 #include <linux/wireless.h>
  37 #include <net/iw_handler.h>
  38 #include <net/ieee80211_radiotap.h>
  39 #include <linux/firmware.h>
  40 #include <linux/leds.h>
  41 #include <net/mac80211.h>
  42
  43 #include "at76c50x-usb.h"
  44
  45 /* Version information */
  46 #define DRIVER_NAME "at76c50x-usb"
  47 #define DRIVER_VERSION  "0.17"
  48 #define DRIVER_DESC "Atmel at76x USB Wireless LAN Driver"
  49
  50 /* at76_debug bits */
  51 #define DBG_PROGRESS            0x00000001      /* authentication/accociation */
  52 #define DBG_BSS_TABLE           0x00000002      /* show BSS table after scans */
  53 #define DBG_IOCTL               0x00000004      /* ioctl calls / settings */
  54 #define DBG_MAC_STATE           0x00000008      /* MAC state transitions */
  55 #define DBG_TX_DATA             0x00000010      /* tx header */
  56 #define DBG_TX_DATA_CONTENT     0x00000020      /* tx content */
  57 #define DBG_TX_MGMT             0x00000040      /* tx management */
  58 #define DBG_RX_DATA             0x00000080      /* rx data header */
  59 #define DBG_RX_DATA_CONTENT     0x00000100      /* rx data content */
  60 #define DBG_RX_MGMT             0x00000200      /* rx mgmt frame headers */
  61 #define DBG_RX_BEACON           0x00000400      /* rx beacon */
  62 #define DBG_RX_CTRL             0x00000800      /* rx control */
  63 #define DBG_RX_MGMT_CONTENT     0x00001000      /* rx mgmt content */
  64 #define DBG_RX_FRAGS            0x00002000      /* rx data fragment handling */
  65 #define DBG_DEVSTART            0x00004000      /* fw download, device start */
  66 #define DBG_URB                 0x00008000      /* rx urb status, ... */
  67 #define DBG_RX_ATMEL_HDR        0x00010000      /* Atmel-specific Rx headers */
  68 #define DBG_PROC_ENTRY          0x00020000      /* procedure entries/exits */
  69 #define DBG_PM                  0x00040000      /* power management settings */
  70 #define DBG_BSS_MATCH           0x00080000      /* BSS match failures */
  71 #define DBG_PARAMS              0x00100000      /* show configured parameters */
  72 #define DBG_WAIT_COMPLETE       0x00200000      /* command completion */
  73 #define DBG_RX_FRAGS_SKB        0x00400000      /* skb header of Rx fragments */
  74 #define DBG_BSS_TABLE_RM        0x00800000      /* purging bss table entries */
  75 #define DBG_MONITOR_MODE        0x01000000      /* monitor mode */
  76 #define DBG_MIB                 0x02000000      /* dump all MIBs on startup */
  77 #define DBG_MGMT_TIMER          0x04000000      /* dump mgmt_timer ops */
  78 #define DBG_WE_EVENTS           0x08000000      /* dump wireless events */
  79 #define DBG_FW                  0x10000000      /* firmware download */
  80 #define DBG_DFU                 0x20000000      /* device firmware upgrade */
  81 #define DBG_CMD                 0x40000000
  82 #define DBG_MAC80211            0x80000000
  83
  84 #define DBG_DEFAULTS            0
  85
  86 /* Use our own dbg macro */
  87 #define at76_dbg(bits, format, arg...)                                  \
  88 do {                                                                    \
  89         if (at76_debug & (bits))                                        \
  90                 printk(KERN_DEBUG DRIVER_NAME ": " format "\n", ##arg); \
  91 } while (0)
  92
  93 #define at76_dbg_dump(bits, buf, len, format, arg...)                   \
  94 do {                                                                    \
  95         if (at76_debug & (bits)) {                                      \
  96                 printk(KERN_DEBUG DRIVER_NAME ": " format "\n", ##arg); \
  97                 print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len); \
  98         }                                                               \
  99 } while (0)
 100
 101 static uint at76_debug = DBG_DEFAULTS;
 102
 103 /* Protect against concurrent firmware loading and parsing */
 104 static struct mutex fw_mutex;
 105
 106 static struct fwentry firmwares[] = {
 107         [0] = { "" },
 108         [BOARD_503_ISL3861] = { "atmel_at76c503-i3861.bin" },
 109         [BOARD_503_ISL3863] = { "atmel_at76c503-i3863.bin" },
 110         [BOARD_503] = { "atmel_at76c503-rfmd.bin" },
 111         [BOARD_503_ACC] = { "atmel_at76c503-rfmd-acc.bin" },
 112         [BOARD_505] = { "atmel_at76c505-rfmd.bin" },
 113         [BOARD_505_2958] = { "atmel_at76c505-rfmd2958.bin" },
 114         [BOARD_505A] = { "atmel_at76c505a-rfmd2958.bin" },
 115         [BOARD_505AMX] = { "atmel_at76c505amx-rfmd.bin" },
 116 };
 117 MODULE_FIRMWARE("atmel_at76c503-i3861.bin");
 118 MODULE_FIRMWARE("atmel_at76c503-i3863.bin");
 119 MODULE_FIRMWARE("atmel_at76c503-rfmd.bin");
 120 MODULE_FIRMWARE("atmel_at76c503-rfmd-acc.bin");
 121 MODULE_FIRMWARE("atmel_at76c505-rfmd.bin");
 122 MODULE_FIRMWARE("atmel_at76c505-rfmd2958.bin");
 123 MODULE_FIRMWARE("atmel_at76c505a-rfmd2958.bin");
 124 MODULE_FIRMWARE("atmel_at76c505amx-rfmd.bin");
 125
 126 #define USB_DEVICE_DATA(__ops)  .driver_info = (kernel_ulong_t)(__ops)
 127
 128 static const struct usb_device_id dev_table[] = {
 129         /*
 130          * at76c503-i3861
 131          */
 132         /* Generic AT76C503/3861 device */
 133         { USB_DEVICE(0x03eb, 0x7603), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 134         /* Linksys WUSB11 v2.1/v2.6 */
 135         { USB_DEVICE(0x066b, 0x2211), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 136         /* Netgear MA101 rev. A */
 137         { USB_DEVICE(0x0864, 0x4100), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 138         /* Tekram U300C / Allnet ALL0193 */
 139         { USB_DEVICE(0x0b3b, 0x1612), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 140         /* HP HN210W J7801A */
 141         { USB_DEVICE(0x03f0, 0x011c), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 142         /* Sitecom/Z-Com/Zyxel M4Y-750 */
 143         { USB_DEVICE(0x0cde, 0x0001), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 144         /* Dynalink/Askey WLL013 (intersil) */
 145         { USB_DEVICE(0x069a, 0x0320), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 146         /* EZ connect 11Mpbs Wireless USB Adapter SMC2662W v1 */
 147         { USB_DEVICE(0x0d5c, 0xa001), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 148         /* BenQ AWL300 */
 149         { USB_DEVICE(0x04a5, 0x9000), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 150         /* Addtron AWU-120, Compex WLU11 */
 151         { USB_DEVICE(0x05dd, 0xff31), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 152         /* Intel AP310 AnyPoint II USB */
 153         { USB_DEVICE(0x8086, 0x0200), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 154         /* Dynalink L11U */
 155         { USB_DEVICE(0x0d8e, 0x7100), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 156         /* Arescom WL-210, FCC id 07J-GL2411USB */
 157         { USB_DEVICE(0x0d8e, 0x7110), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 158         /* I-O DATA WN-B11/USB */
 159         { USB_DEVICE(0x04bb, 0x0919), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 160         /* BT Voyager 1010 */
 161         { USB_DEVICE(0x069a, 0x0821), USB_DEVICE_DATA(BOARD_503_ISL3861) },
 162         /*
 163          * at76c503-i3863
 164          */
 165         /* Generic AT76C503/3863 device */
 166         { USB_DEVICE(0x03eb, 0x7604), USB_DEVICE_DATA(BOARD_503_ISL3863) },
 167         /* Samsung SWL-2100U */
 168         { USB_DEVICE(0x055d, 0xa000), USB_DEVICE_DATA(BOARD_503_ISL3863) },
 169         /*
 170          * at76c503-rfmd
 171          */
 172         /* Generic AT76C503/RFMD device */
 173         { USB_DEVICE(0x03eb, 0x7605), USB_DEVICE_DATA(BOARD_503) },
 174         /* Dynalink/Askey WLL013 (rfmd) */
 175         { USB_DEVICE(0x069a, 0x0321), USB_DEVICE_DATA(BOARD_503) },
 176         /* Linksys WUSB11 v2.6 */
 177         { USB_DEVICE(0x077b, 0x2219), USB_DEVICE_DATA(BOARD_503) },
 178         /* Network Everywhere NWU11B */
 179         { USB_DEVICE(0x077b, 0x2227), USB_DEVICE_DATA(BOARD_503) },
 180         /* Netgear MA101 rev. B */
 181         { USB_DEVICE(0x0864, 0x4102), USB_DEVICE_DATA(BOARD_503) },
 182         /* D-Link DWL-120 rev. E */
 183         { USB_DEVICE(0x2001, 0x3200), USB_DEVICE_DATA(BOARD_503) },
 184         /* Actiontec 802UAT1, HWU01150-01UK */
 185         { USB_DEVICE(0x1668, 0x7605), USB_DEVICE_DATA(BOARD_503) },
 186         /* AirVast W-Buddie WN210 */
 187         { USB_DEVICE(0x03eb, 0x4102), USB_DEVICE_DATA(BOARD_503) },
 188         /* Dick Smith Electronics XH1153 802.11b USB adapter */
 189         { USB_DEVICE(0x1371, 0x5743), USB_DEVICE_DATA(BOARD_503) },
 190         /* CNet CNUSB611 */
 191         { USB_DEVICE(0x1371, 0x0001), USB_DEVICE_DATA(BOARD_503) },
 192         /* FiberLine FL-WL200U */
 193         { USB_DEVICE(0x1371, 0x0002), USB_DEVICE_DATA(BOARD_503) },
 194         /* BenQ AWL400 USB stick */
 195         { USB_DEVICE(0x04a5, 0x9001), USB_DEVICE_DATA(BOARD_503) },
 196         /* 3Com 3CRSHEW696 */
 197         { USB_DEVICE(0x0506, 0x0a01), USB_DEVICE_DATA(BOARD_503) },
 198         /* Siemens Santis ADSL WLAN USB adapter WLL 013 */
 199         { USB_DEVICE(0x0681, 0x001b), USB_DEVICE_DATA(BOARD_503) },
 200         /* Belkin F5D6050, version 2 */
 201         { USB_DEVICE(0x050d, 0x0050), USB_DEVICE_DATA(BOARD_503) },
 202         /* iBlitzz, BWU613 (not *B or *SB) */
 203         { USB_DEVICE(0x07b8, 0xb000), USB_DEVICE_DATA(BOARD_503) },
 204         /* Gigabyte GN-WLBM101 */
 205         { USB_DEVICE(0x1044, 0x8003), USB_DEVICE_DATA(BOARD_503) },
 206         /* Planex GW-US11S */
 207         { USB_DEVICE(0x2019, 0x3220), USB_DEVICE_DATA(BOARD_503) },
 208         /* Internal WLAN adapter in h5[4,5]xx series iPAQs */
 209         { USB_DEVICE(0x049f, 0x0032), USB_DEVICE_DATA(BOARD_503) },
 210         /* Corega Wireless LAN USB-11 mini */
 211         { USB_DEVICE(0x07aa, 0x0011), USB_DEVICE_DATA(BOARD_503) },
 212         /* Corega Wireless LAN USB-11 mini2 */
 213         { USB_DEVICE(0x07aa, 0x0018), USB_DEVICE_DATA(BOARD_503) },
 214         /* Uniden PCW100 */
 215         { USB_DEVICE(0x05dd, 0xff35), USB_DEVICE_DATA(BOARD_503) },
 216         /*
 217          * at76c503-rfmd-acc
 218          */
 219         /* SMC2664W */
 220         { USB_DEVICE(0x083a, 0x3501), USB_DEVICE_DATA(BOARD_503_ACC) },
 221         /* Belkin F5D6050, SMC2662W v2, SMC2662W-AR */
 222         { USB_DEVICE(0x0d5c, 0xa002), USB_DEVICE_DATA(BOARD_503_ACC) },
 223         /*
 224          * at76c505-rfmd
 225          */
 226         /* Generic AT76C505/RFMD */
 227         { USB_DEVICE(0x03eb, 0x7606), USB_DEVICE_DATA(BOARD_505) },
 228         /*
 229          * at76c505-rfmd2958
 230          */
 231         /* Generic AT76C505/RFMD, OvisLink WL-1130USB */
 232         { USB_DEVICE(0x03eb, 0x7613), USB_DEVICE_DATA(BOARD_505_2958) },
 233         /* Fiberline FL-WL240U */
 234         { USB_DEVICE(0x1371, 0x0014), USB_DEVICE_DATA(BOARD_505_2958) },
 235         /* CNet CNUSB-611G */
 236         { USB_DEVICE(0x1371, 0x0013), USB_DEVICE_DATA(BOARD_505_2958) },
 237         /* Linksys WUSB11 v2.8 */
 238         { USB_DEVICE(0x1915, 0x2233), USB_DEVICE_DATA(BOARD_505_2958) },
 239         /* Xterasys XN-2122B, IBlitzz BWU613B/BWU613SB */
 240         { USB_DEVICE(0x12fd, 0x1001), USB_DEVICE_DATA(BOARD_505_2958) },
 241         /* Corega WLAN USB Stick 11 */
 242         { USB_DEVICE(0x07aa, 0x7613), USB_DEVICE_DATA(BOARD_505_2958) },
 243         /* Microstar MSI Box MS6978 */
 244         { USB_DEVICE(0x0db0, 0x1020), USB_DEVICE_DATA(BOARD_505_2958) },
 245         /*
 246          * at76c505a-rfmd2958
 247          */
 248         /* Generic AT76C505A device */
 249         { USB_DEVICE(0x03eb, 0x7614), USB_DEVICE_DATA(BOARD_505A) },
 250         /* Generic AT76C505AS device */
 251         { USB_DEVICE(0x03eb, 0x7617), USB_DEVICE_DATA(BOARD_505A) },
 252         /* Siemens Gigaset USB WLAN Adapter 11 */
 253         { USB_DEVICE(0x1690, 0x0701), USB_DEVICE_DATA(BOARD_505A) },
 254         /* OQO Model 01+ Internal Wi-Fi */
 255         { USB_DEVICE(0x1557, 0x0002), USB_DEVICE_DATA(BOARD_505A) },
 256         /*
 257          * at76c505amx-rfmd
 258          */
 259         /* Generic AT76C505AMX device */
 260         { USB_DEVICE(0x03eb, 0x7615), USB_DEVICE_DATA(BOARD_505AMX) },
 261         { }
 262 };
 263
 264 MODULE_DEVICE_TABLE(usb, dev_table);
 265
 266 /* Supported rates of this hardware, bit 7 marks basic rates */
 267 static const u8 hw_rates[] = { 0x82, 0x84, 0x0b, 0x16 };
 268
 269 static const char *const preambles[] = { "long", "short", "auto" };
 270
 271 /* Firmware download */
 272 /* DFU states */
 273 #define STATE_IDLE                      0x00
 274 #define STATE_DETACH                    0x01
 275 #define STATE_DFU_IDLE                  0x02
 276 #define STATE_DFU_DOWNLOAD_SYNC         0x03
 277 #define STATE_DFU_DOWNLOAD_BUSY         0x04
 278 #define STATE_DFU_DOWNLOAD_IDLE         0x05
 279 #define STATE_DFU_MANIFEST_SYNC         0x06
 280 #define STATE_DFU_MANIFEST              0x07
 281 #define STATE_DFU_MANIFEST_WAIT_RESET   0x08
 282 #define STATE_DFU_UPLOAD_IDLE           0x09
 283 #define STATE_DFU_ERROR                 0x0a
 284
 285 /* DFU commands */
 286 #define DFU_DETACH                      0
 287 #define DFU_DNLOAD                      1
 288 #define DFU_UPLOAD                      2
 289 #define DFU_GETSTATUS                   3
 290 #define DFU_CLRSTATUS                   4
 291 #define DFU_GETSTATE                    5
 292 #define DFU_ABORT                       6
 293
 294 #define FW_BLOCK_SIZE 1024
 295
 296 struct dfu_status {
 297         unsigned char status;
 298         unsigned char poll_timeout[3];
 299         unsigned char state;
 300         unsigned char string;
 301 } __packed;
 302
 303 static inline int at76_is_intersil(enum board_type board)
 304 {
 305         return (board == BOARD_503_ISL3861 || board == BOARD_503_ISL3863);
 306 }
 307
 308 static inline int at76_is_503rfmd(enum board_type board)
 309 {
 310         return (board == BOARD_503 || board == BOARD_503_ACC);
 311 }
 312
 313 static inline int at76_is_505a(enum board_type board)
 314 {
 315         return (board == BOARD_505A || board == BOARD_505AMX);
 316 }
 317
 318 /* Load a block of the first (internal) part of the firmware */
 319 static int at76_load_int_fw_block(struct usb_device *udev, int blockno,
 320                                   void *block, int size)
 321 {
 322         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), DFU_DNLOAD,
 323                                USB_TYPE_CLASS | USB_DIR_OUT |
 324                                USB_RECIP_INTERFACE, blockno, 0, block, size,
 325                                USB_CTRL_GET_TIMEOUT);
 326 }
 327
 328 static int at76_dfu_get_status(struct usb_device *udev,
 329                                struct dfu_status *status)
 330 {
 331         int ret;
 332
 333         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), DFU_GETSTATUS,
 334                               USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
 335                               0, 0, status, sizeof(struct dfu_status),
 336                               USB_CTRL_GET_TIMEOUT);
 337         return ret;
 338 }
 339
 340 static int at76_dfu_get_state(struct usb_device *udev, u8 *state)
 341 {
 342         int ret;
 343
 344         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), DFU_GETSTATE,
 345                               USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
 346                               0, 0, state, 1, USB_CTRL_GET_TIMEOUT);
 347         return ret;
 348 }
 349
 350 /* Convert timeout from the DFU status to jiffies */
 351 static inline unsigned long at76_get_timeout(struct dfu_status *s)
 352 {
 353         return msecs_to_jiffies((s->poll_timeout[2] << 16)
 354                                 | (s->poll_timeout[1] << 8)
 355                                 | (s->poll_timeout[0]));
 356 }
 357
 358 /* Load internal firmware from the buffer.  If manifest_sync_timeout > 0, use
 359  * its value in jiffies in the MANIFEST_SYNC state.  */
 360 static int at76_usbdfu_download(struct usb_device *udev, u8 *buf, u32 size,
 361                                 int manifest_sync_timeout)
 362 {
 363         int ret = 0;
 364         int need_dfu_state = 1;
 365         int is_done = 0;
 366         u32 dfu_timeout = 0;
 367         int bsize = 0;
 368         int blockno = 0;
 369         struct dfu_status *dfu_stat_buf = NULL;
 370         u8 *dfu_state = NULL;
 371         u8 *block = NULL;
 372
 373         at76_dbg(DBG_DFU, "%s( %p, %u, %d)", __func__, buf, size,
 374                  manifest_sync_timeout);
 375
 376         if (!size) {
 377                 dev_err(&udev->dev, "FW buffer length invalid!\n");
 378                 return -EINVAL;
 379         }
 380
 381         dfu_stat_buf = kmalloc(sizeof(struct dfu_status), GFP_KERNEL);
 382         if (!dfu_stat_buf) {
 383                 ret = -ENOMEM;
 384                 goto exit;
 385         }
 386
 387         block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
 388         if (!block) {
 389                 ret = -ENOMEM;
 390                 goto exit;
 391         }
 392
 393         dfu_state = kmalloc(sizeof(u8), GFP_KERNEL);
 394         if (!dfu_state) {
 395                 ret = -ENOMEM;
 396                 goto exit;
 397         }
 398         *dfu_state = 0;
 399
 400         do {
 401                 if (need_dfu_state) {
 402                         ret = at76_dfu_get_state(udev, dfu_state);
 403                         if (ret < 0) {
 404                                 dev_err(&udev->dev,
 405                                         "cannot get DFU state: %d\n", ret);
 406                                 goto exit;
 407                         }
 408                         need_dfu_state = 0;
 409                 }
 410
 411                 switch (*dfu_state) {
 412                 case STATE_DFU_DOWNLOAD_SYNC:
 413                         at76_dbg(DBG_DFU, "STATE_DFU_DOWNLOAD_SYNC");
 414                         ret = at76_dfu_get_status(udev, dfu_stat_buf);
 415                         if (ret >= 0) {
 416                                 *dfu_state = dfu_stat_buf->state;
 417                                 dfu_timeout = at76_get_timeout(dfu_stat_buf);
 418                                 need_dfu_state = 0;
 419                         } else
 420                                 dev_err(&udev->dev,
 421                                         "at76_dfu_get_status returned %d\n",
 422                                         ret);
 423                         break;
 424
 425                 case STATE_DFU_DOWNLOAD_BUSY:
 426                         at76_dbg(DBG_DFU, "STATE_DFU_DOWNLOAD_BUSY");
 427                         need_dfu_state = 1;
 428
 429                         at76_dbg(DBG_DFU, "DFU: Resetting device");
 430                         schedule_timeout_interruptible(dfu_timeout);
 431                         break;
 432
 433                 case STATE_DFU_DOWNLOAD_IDLE:
 434                         at76_dbg(DBG_DFU, "DOWNLOAD...");
 435                         /* fall through */
 436                 case STATE_DFU_IDLE:
 437                         at76_dbg(DBG_DFU, "DFU IDLE");
 438
 439                         bsize = min_t(int, size, FW_BLOCK_SIZE);
 440                         memcpy(block, buf, bsize);
 441                         at76_dbg(DBG_DFU, "int fw, size left = %5d, "
 442                                  "bsize = %4d, blockno = %2d", size, bsize,
 443                                  blockno);
 444                         ret =
 445                             at76_load_int_fw_block(udev, blockno, block, bsize);
 446                         buf += bsize;
 447                         size -= bsize;
 448                         blockno++;
 449
 450                         if (ret != bsize)
 451                                 dev_err(&udev->dev,
 452                                         "at76_load_int_fw_block returned %d\n",
 453                                         ret);
 454                         need_dfu_state = 1;
 455                         break;
 456
 457                 case STATE_DFU_MANIFEST_SYNC:
 458                         at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST_SYNC");
 459
 460                         ret = at76_dfu_get_status(udev, dfu_stat_buf);
 461                         if (ret < 0)
 462                                 break;
 463
 464                         *dfu_state = dfu_stat_buf->state;
 465                         dfu_timeout = at76_get_timeout(dfu_stat_buf);
 466                         need_dfu_state = 0;
 467
 468                         /* override the timeout from the status response,
 469                            needed for AT76C505A */
 470                         if (manifest_sync_timeout > 0)
 471                                 dfu_timeout = manifest_sync_timeout;
 472
 473                         at76_dbg(DBG_DFU, "DFU: Waiting for manifest phase");
 474                         schedule_timeout_interruptible(dfu_timeout);
 475                         break;
 476
 477                 case STATE_DFU_MANIFEST:
 478                         at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST");
 479                         is_done = 1;
 480                         break;
 481
 482                 case STATE_DFU_MANIFEST_WAIT_RESET:
 483                         at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST_WAIT_RESET");
 484                         is_done = 1;
 485                         break;
 486
 487                 case STATE_DFU_UPLOAD_IDLE:
 488                         at76_dbg(DBG_DFU, "STATE_DFU_UPLOAD_IDLE");
 489                         break;
 490
 491                 case STATE_DFU_ERROR:
 492                         at76_dbg(DBG_DFU, "STATE_DFU_ERROR");
 493                         ret = -EPIPE;
 494                         break;
 495
 496                 default:
 497                         at76_dbg(DBG_DFU, "DFU UNKNOWN STATE (%d)", *dfu_state);
 498                         ret = -EINVAL;
 499                         break;
 500                 }
 501         } while (!is_done && (ret >= 0));
 502
 503 exit:
 504         kfree(dfu_state);
 505         kfree(block);
 506         kfree(dfu_stat_buf);
 507
 508         if (ret >= 0)
 509                 ret = 0;
 510
 511         return ret;
 512 }
 513
 514 /* LED trigger */
 515 static int tx_activity;
 516 static void at76_ledtrig_tx_timerfunc(struct timer_list *unused);
 517 static DEFINE_TIMER(ledtrig_tx_timer, at76_ledtrig_tx_timerfunc);
 518 DEFINE_LED_TRIGGER(ledtrig_tx);
 519
 520 static void at76_ledtrig_tx_timerfunc(struct timer_list *unused)
 521 {
 522         static int tx_lastactivity;
 523
 524         if (tx_lastactivity != tx_activity) {
 525                 tx_lastactivity = tx_activity;
 526                 led_trigger_event(ledtrig_tx, LED_FULL);
 527                 mod_timer(&ledtrig_tx_timer, jiffies + HZ / 4);
 528         } else
 529                 led_trigger_event(ledtrig_tx, LED_OFF);
 530 }
 531
 532 static void at76_ledtrig_tx_activity(void)
 533 {
 534         tx_activity++;
 535         if (!timer_pending(&ledtrig_tx_timer))
 536                 mod_timer(&ledtrig_tx_timer, jiffies + HZ / 4);
 537 }
 538
 539 static int at76_remap(struct usb_device *udev)
 540 {
 541         int ret;
 542         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0a,
 543                               USB_TYPE_VENDOR | USB_DIR_OUT |
 544                               USB_RECIP_INTERFACE, 0, 0, NULL, 0,
 545                               USB_CTRL_GET_TIMEOUT);
 546         if (ret < 0)
 547                 return ret;
 548         return 0;
 549 }
 550
 551 static int at76_get_op_mode(struct usb_device *udev)
 552 {
 553         int ret;
 554         u8 saved;
 555         u8 *op_mode;
 556
 557         op_mode = kmalloc(1, GFP_NOIO);
 558         if (!op_mode)
 559                 return -ENOMEM;
 560         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
 561                               USB_TYPE_VENDOR | USB_DIR_IN |
 562                               USB_RECIP_INTERFACE, 0x01, 0, op_mode, 1,
 563                               USB_CTRL_GET_TIMEOUT);
 564         saved = *op_mode;
 565         kfree(op_mode);
 566
 567         if (ret < 0)
 568                 return ret;
 569         else if (ret < 1)
 570                 return -EIO;
 571         else
 572                 return saved;
 573 }
 574
 575 /* Load a block of the second ("external") part of the firmware */
 576 static inline int at76_load_ext_fw_block(struct usb_device *udev, int blockno,
 577                                          void *block, int size)
 578 {
 579         return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0e,
 580                                USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 581                                0x0802, blockno, block, size,
 582                                USB_CTRL_GET_TIMEOUT);
 583 }
 584
 585 static inline int at76_get_hw_cfg(struct usb_device *udev,
 586                                   union at76_hwcfg *buf, int buf_size)
 587 {
 588         return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
 589                                USB_TYPE_VENDOR | USB_DIR_IN |
 590                                USB_RECIP_INTERFACE, 0x0a02, 0,
 591                                buf, buf_size, USB_CTRL_GET_TIMEOUT);
 592 }
 593
 594 /* Intersil boards use a different "value" for GetHWConfig requests */
 595 static inline int at76_get_hw_cfg_intersil(struct usb_device *udev,
 596                                            union at76_hwcfg *buf, int buf_size)
 597 {
 598         return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
 599                                USB_TYPE_VENDOR | USB_DIR_IN |
 600                                USB_RECIP_INTERFACE, 0x0902, 0,
 601                                buf, buf_size, USB_CTRL_GET_TIMEOUT);
 602 }
 603
 604 /* Get the hardware configuration for the adapter and put it to the appropriate
 605  * fields of 'priv' (the GetHWConfig request and interpretation of the result
 606  * depends on the board type) */
 607 static int at76_get_hw_config(struct at76_priv *priv)
 608 {
 609         int ret;
 610         union at76_hwcfg *hwcfg = kmalloc(sizeof(*hwcfg), GFP_KERNEL);
 611
 612         if (!hwcfg)
 613                 return -ENOMEM;
 614
 615         if (at76_is_intersil(priv->board_type)) {
 616                 ret = at76_get_hw_cfg_intersil(priv->udev, hwcfg,
 617                                                sizeof(hwcfg->i));
 618                 if (ret < 0)
 619                         goto exit;
 620                 memcpy(priv->mac_addr, hwcfg->i.mac_addr, ETH_ALEN);
 621                 priv->regulatory_domain = hwcfg->i.regulatory_domain;
 622         } else if (at76_is_503rfmd(priv->board_type)) {
 623                 ret = at76_get_hw_cfg(priv->udev, hwcfg, sizeof(hwcfg->r3));
 624                 if (ret < 0)
 625                         goto exit;
 626                 memcpy(priv->mac_addr, hwcfg->r3.mac_addr, ETH_ALEN);
 627                 priv->regulatory_domain = hwcfg->r3.regulatory_domain;
 628         } else {
 629                 ret = at76_get_hw_cfg(priv->udev, hwcfg, sizeof(hwcfg->r5));
 630                 if (ret < 0)
 631                         goto exit;
 632                 memcpy(priv->mac_addr, hwcfg->r5.mac_addr, ETH_ALEN);
 633                 priv->regulatory_domain = hwcfg->r5.regulatory_domain;
 634         }
 635
 636 exit:
 637         kfree(hwcfg);
 638         if (ret < 0)
 639                 wiphy_err(priv->hw->wiphy, "cannot get HW Config (error %d)\n",
 640                           ret);
 641
 642         return ret;
 643 }
 644
 645 static struct reg_domain const *at76_get_reg_domain(u16 code)
 646 {
 647         int i;
 648         static struct reg_domain const fd_tab[] = {
 649                 { 0x10, "FCC (USA)", 0x7ff },   /* ch 1-11 */
 650                 { 0x20, "IC (Canada)", 0x7ff }, /* ch 1-11 */
 651                 { 0x30, "ETSI (most of Europe)", 0x1fff },      /* ch 1-13 */
 652                 { 0x31, "Spain", 0x600 },       /* ch 10-11 */
 653                 { 0x32, "France", 0x1e00 },     /* ch 10-13 */
 654                 { 0x40, "MKK (Japan)", 0x2000 },        /* ch 14 */
 655                 { 0x41, "MKK1 (Japan)", 0x3fff },       /* ch 1-14 */
 656                 { 0x50, "Israel", 0x3fc },      /* ch 3-9 */
 657                 { 0x00, "<unknown>", 0xffffffff }       /* ch 1-32 */
 658         };
 659
 660         /* Last entry is fallback for unknown domain code */
 661         for (i = 0; i < ARRAY_SIZE(fd_tab) - 1; i++)
 662                 if (code == fd_tab[i].code)
 663                         break;
 664
 665         return &fd_tab[i];
 666 }
 667
 668 static inline int at76_get_mib(struct usb_device *udev, u16 mib, void *buf,
 669                                int buf_size)
 670 {
 671         int ret;
 672
 673         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
 674                               USB_TYPE_VENDOR | USB_DIR_IN |
 675                               USB_RECIP_INTERFACE, mib << 8, 0, buf, buf_size,
 676                               USB_CTRL_GET_TIMEOUT);
 677         if (ret >= 0 && ret != buf_size)
 678                 return -EIO;
 679         return ret;
 680 }
 681
 682 /* Return positive number for status, negative for an error */
 683 static inline int at76_get_cmd_status(struct usb_device *udev, u8 cmd)
 684 {
 685         u8 *stat_buf;
 686         int ret;
 687
 688         stat_buf = kmalloc(40, GFP_NOIO);
 689         if (!stat_buf)
 690                 return -ENOMEM;
 691
 692         ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x22,
 693                         USB_TYPE_VENDOR | USB_DIR_IN |
 694                         USB_RECIP_INTERFACE, cmd, 0, stat_buf,
 695                         40, USB_CTRL_GET_TIMEOUT);
 696         if (ret >= 0)
 697                 ret = stat_buf[5];
 698         kfree(stat_buf);
 699
 700         return ret;
 701 }
 702
 703 #define MAKE_CMD_CASE(c) case (c): return #c
 704 static const char *at76_get_cmd_string(u8 cmd_status)
 705 {
 706         switch (cmd_status) {
 707                 MAKE_CMD_CASE(CMD_SET_MIB);
 708                 MAKE_CMD_CASE(CMD_GET_MIB);
 709                 MAKE_CMD_CASE(CMD_SCAN);
 710                 MAKE_CMD_CASE(CMD_JOIN);
 711                 MAKE_CMD_CASE(CMD_START_IBSS);
 712                 MAKE_CMD_CASE(CMD_RADIO_ON);
 713                 MAKE_CMD_CASE(CMD_RADIO_OFF);
 714                 MAKE_CMD_CASE(CMD_STARTUP);
 715         }
 716
 717         return "UNKNOWN";
 718 }
 719
 720 static int at76_set_card_command(struct usb_device *udev, u8 cmd, void *buf,
 721                                  int buf_size)
 722 {
 723         int ret;
 724         struct at76_command *cmd_buf = kmalloc(sizeof(struct at76_command) +
 725                                                buf_size, GFP_KERNEL);
 726
 727         if (!cmd_buf)
 728                 return -ENOMEM;
 729
 730         cmd_buf->cmd = cmd;
 731         cmd_buf->reserved = 0;
 732         cmd_buf->size = cpu_to_le16(buf_size);
 733         memcpy(cmd_buf->data, buf, buf_size);
 734
 735         at76_dbg_dump(DBG_CMD, cmd_buf, sizeof(struct at76_command) + buf_size,
 736                       "issuing command %s (0x%02x)",
 737                       at76_get_cmd_string(cmd), cmd);
 738
 739         ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0e,
 740                               USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
 741                               0, 0, cmd_buf,
 742                               sizeof(struct at76_command) + buf_size,
 743                               USB_CTRL_GET_TIMEOUT);
 744         kfree(cmd_buf);
 745         return ret;
 746 }
 747
 748 #define MAKE_CMD_STATUS_CASE(c) case (c): return #c
 749 static const char *at76_get_cmd_status_string(u8 cmd_status)
 750 {
 751         switch (cmd_status) {
 752                 MAKE_CMD_STATUS_CASE(CMD_STATUS_IDLE);
 753                 MAKE_CMD_STATUS_CASE(CMD_STATUS_COMPLETE);
 754                 MAKE_CMD_STATUS_CASE(CMD_STATUS_UNKNOWN);
 755                 MAKE_CMD_STATUS_CASE(CMD_STATUS_INVALID_PARAMETER);
 756                 MAKE_CMD_STATUS_CASE(CMD_STATUS_FUNCTION_NOT_SUPPORTED);
 757                 MAKE_CMD_STATUS_CASE(CMD_STATUS_TIME_OUT);
 758                 MAKE_CMD_STATUS_CASE(CMD_STATUS_IN_PROGRESS);
 759                 MAKE_CMD_STATUS_CASE(CMD_STATUS_HOST_FAILURE);
 760                 MAKE_CMD_STATUS_CASE(CMD_STATUS_SCAN_FAILED);
 761         }
 762
 763         return "UNKNOWN";
 764 }
 765
 766 /* Wait until the command is completed */
 767 static int at76_wait_completion(struct at76_priv *priv, int cmd)
 768 {
 769         int status = 0;
 770         unsigned long timeout = jiffies + CMD_COMPLETION_TIMEOUT;
 771
 772         do {
 773                 status = at76_get_cmd_status(priv->udev, cmd);
 774                 if (status < 0) {
 775                         wiphy_err(priv->hw->wiphy,
 776                                   "at76_get_cmd_status failed: %d\n",
 777                                   status);
 778                         break;
 779                 }
 780
 781                 at76_dbg(DBG_WAIT_COMPLETE,
 782                          "%s: Waiting on cmd %d, status = %d (%s)",
 783                          wiphy_name(priv->hw->wiphy), cmd, status,
 784                          at76_get_cmd_status_string(status));
 785
 786                 if (status != CMD_STATUS_IN_PROGRESS
 787                     && status != CMD_STATUS_IDLE)
 788                         break;
 789
 790                 schedule_timeout_interruptible(HZ / 10);        /* 100 ms */
 791                 if (time_after(jiffies, timeout)) {
 792                         wiphy_err(priv->hw->wiphy,
 793                                   "completion timeout for command %d\n", cmd);
 794                         status = -ETIMEDOUT;
 795                         break;
 796                 }
 797         } while (1);
 798
 799         return status;
 800 }
 801
 802 static int at76_set_mib(struct at76_priv *priv, struct set_mib_buffer *buf)
 803 {
 804         int ret;
 805
 806         ret = at76_set_card_command(priv->udev, CMD_SET_MIB, buf,
 807                                     offsetof(struct set_mib_buffer,
 808                                              data) + buf->size);
 809         if (ret < 0)
 810                 return ret;
 811
 812         ret = at76_wait_completion(priv, CMD_SET_MIB);
 813         if (ret != CMD_STATUS_COMPLETE) {
 814                 wiphy_info(priv->hw->wiphy,
 815                            "set_mib: at76_wait_completion failed with %d\n",
 816                            ret);
 817                 ret = -EIO;
 818         }
 819
 820         return ret;
 821 }
 822
 823 /* Return < 0 on error, == 0 if no command sent, == 1 if cmd sent */
 824 static int at76_set_radio(struct at76_priv *priv, int enable)
 825 {
 826         int ret;
 827         int cmd;
 828
 829         if (priv->radio_on == enable)
 830                 return 0;
 831
 832         cmd = enable ? CMD_RADIO_ON : CMD_RADIO_OFF;
 833
 834         ret = at76_set_card_command(priv->udev, cmd, NULL, 0);
 835         if (ret < 0)
 836                 wiphy_err(priv->hw->wiphy,
 837                           "at76_set_card_command(%d) failed: %d\n", cmd, ret);
 838         else
 839                 ret = 1;
 840
 841         priv->radio_on = enable;
 842         return ret;
 843 }
 844
 845 /* Set current power save mode (AT76_PM_OFF/AT76_PM_ON/AT76_PM_SMART) */
 846 static int at76_set_pm_mode(struct at76_priv *priv)
 847 {
 848         int ret = 0;
 849
 850         priv->mib_buf.type = MIB_MAC_MGMT;
 851         priv->mib_buf.size = 1;
 852         priv->mib_buf.index = offsetof(struct mib_mac_mgmt, power_mgmt_mode);
 853         priv->mib_buf.data.byte = priv->pm_mode;
 854
 855         ret = at76_set_mib(priv, &priv->mib_buf);
 856         if (ret < 0)
 857                 wiphy_err(priv->hw->wiphy, "set_mib (pm_mode) failed: %d\n",
 858                           ret);
 859
 860         return ret;
 861 }
 862
 863 static int at76_set_preamble(struct at76_priv *priv, u8 type)
 864 {
 865         int ret = 0;
 866
 867         priv->mib_buf.type = MIB_LOCAL;
 868         priv->mib_buf.size = 1;
 869         priv->mib_buf.index = offsetof(struct mib_local, preamble_type);
 870         priv->mib_buf.data.byte = type;
 871
 872         ret = at76_set_mib(priv, &priv->mib_buf);
 873         if (ret < 0)
 874                 wiphy_err(priv->hw->wiphy, "set_mib (preamble) failed: %d\n",
 875                           ret);
 876
 877         return ret;
 878 }
 879
 880 static int at76_set_frag(struct at76_priv *priv, u16 size)
 881 {
 882         int ret = 0;
 883
 884         priv->mib_buf.type = MIB_MAC;
 885         priv->mib_buf.size = 2;
 886         priv->mib_buf.index = offsetof(struct mib_mac, frag_threshold);
 887         priv->mib_buf.data.word = cpu_to_le16(size);
 888
 889         ret = at76_set_mib(priv, &priv->mib_buf);
 890         if (ret < 0)
 891                 wiphy_err(priv->hw->wiphy,
 892                           "set_mib (frag threshold) failed: %d\n", ret);
 893
 894         return ret;
 895 }
 896
 897 static int at76_set_rts(struct at76_priv *priv, u16 size)
 898 {
 899         int ret = 0;
 900
 901         priv->mib_buf.type = MIB_MAC;
 902         priv->mib_buf.size = 2;
 903         priv->mib_buf.index = offsetof(struct mib_mac, rts_threshold);
 904         priv->mib_buf.data.word = cpu_to_le16(size);
 905
 906         ret = at76_set_mib(priv, &priv->mib_buf);
 907         if (ret < 0)
 908                 wiphy_err(priv->hw->wiphy, "set_mib (rts) failed: %d\n", ret);
 909
 910         return ret;
 911 }
 912
 913 static int at76_set_autorate_fallback(struct at76_priv *priv, int onoff)
 914 {
 915         int ret = 0;
 916
 917         priv->mib_buf.type = MIB_LOCAL;
 918         priv->mib_buf.size = 1;
 919         priv->mib_buf.index = offsetof(struct mib_local, txautorate_fallback);
 920         priv->mib_buf.data.byte = onoff;
 921
 922         ret = at76_set_mib(priv, &priv->mib_buf);
 923         if (ret < 0)
 924                 wiphy_err(priv->hw->wiphy,
 925                           "set_mib (autorate fallback) failed: %d\n", ret);
 926
 927         return ret;
 928 }
 929
 930 static void at76_dump_mib_mac_addr(struct at76_priv *priv)
 931 {
 932         int i;
 933         int ret;
 934         struct mib_mac_addr *m = kmalloc(sizeof(struct mib_mac_addr),
 935                                          GFP_KERNEL);
 936
 937         if (!m)
 938                 return;
 939
 940         ret = at76_get_mib(priv->udev, MIB_MAC_ADDR, m,
 941                            sizeof(struct mib_mac_addr));
 942         if (ret < 0) {
 943                 wiphy_err(priv->hw->wiphy,
 944                           "at76_get_mib (MAC_ADDR) failed: %d\n", ret);
 945                 goto exit;
 946         }
 947
 948         at76_dbg(DBG_MIB, "%s: MIB MAC_ADDR: mac_addr %pM res 0x%x 0x%x",
 949                  wiphy_name(priv->hw->wiphy),
 950                  m->mac_addr, m->res[0], m->res[1]);
 951         for (i = 0; i < ARRAY_SIZE(m->group_addr); i++)
 952                 at76_dbg(DBG_MIB, "%s: MIB MAC_ADDR: group addr %d: %pM, "
 953                          "status %d", wiphy_name(priv->hw->wiphy), i,
 954                          m->group_addr[i], m->group_addr_status[i]);
 955 exit:
 956         kfree(m);
 957 }
 958
 959 static void at76_dump_mib_mac_wep(struct at76_priv *priv)
 960 {
 961         int i;
 962         int ret;
 963         int key_len;
 964         struct mib_mac_wep *m = kmalloc(sizeof(struct mib_mac_wep), GFP_KERNEL);
 965
 966         if (!m)
 967                 return;
 968
 969         ret = at76_get_mib(priv->udev, MIB_MAC_WEP, m,
 970                            sizeof(struct mib_mac_wep));
 971         if (ret < 0) {
 972                 wiphy_err(priv->hw->wiphy,
 973                           "at76_get_mib (MAC_WEP) failed: %d\n", ret);
 974                 goto exit;
 975         }
 976
 977         at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: priv_invoked %u def_key_id %u "
 978                  "key_len %u excl_unencr %u wep_icv_err %u wep_excluded %u "
 979                  "encr_level %u key %d", wiphy_name(priv->hw->wiphy),
 980                  m->privacy_invoked, m->wep_default_key_id,
 981                  m->wep_key_mapping_len, m->exclude_unencrypted,
 982                  le32_to_cpu(m->wep_icv_error_count),
 983                  le32_to_cpu(m->wep_excluded_count), m->encryption_level,
 984                  m->wep_default_key_id);
 985
 986         key_len = (m->encryption_level == 1) ?
 987             WEP_SMALL_KEY_LEN : WEP_LARGE_KEY_LEN;
 988
 989         for (i = 0; i < WEP_KEYS; i++)
 990                 at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: key %d: %*phD",
 991                          wiphy_name(priv->hw->wiphy), i,
 992                          key_len, m->wep_default_keyvalue[i]);
 993 exit:
 994         kfree(m);
 995 }
 996
 997 static void at76_dump_mib_mac_mgmt(struct at76_priv *priv)
 998 {
 999         int ret;
1000         struct mib_mac_mgmt *m = kmalloc(sizeof(struct mib_mac_mgmt),
1001                                          GFP_KERNEL);
1002
1003         if (!m)
1004                 return;
1005
1006         ret = at76_get_mib(priv->udev, MIB_MAC_MGMT, m,
1007                            sizeof(struct mib_mac_mgmt));
1008         if (ret < 0) {
1009                 wiphy_err(priv->hw->wiphy,
1010                           "at76_get_mib (MAC_MGMT) failed: %d\n", ret);
1011                 goto exit;
1012         }
1013
1014         at76_dbg(DBG_MIB, "%s: MIB MAC_MGMT: beacon_period %d CFP_max_duration "
1015                  "%d medium_occupancy_limit %d station_id 0x%x ATIM_window %d "
1016                  "CFP_mode %d privacy_opt_impl %d DTIM_period %d CFP_period %d "
1017                  "current_bssid %pM current_essid %*phD current_bss_type %d "
1018                  "pm_mode %d ibss_change %d res %d "
1019                  "multi_domain_capability_implemented %d "
1020                  "international_roaming %d country_string %.3s",
1021                  wiphy_name(priv->hw->wiphy), le16_to_cpu(m->beacon_period),
1022                  le16_to_cpu(m->CFP_max_duration),
1023                  le16_to_cpu(m->medium_occupancy_limit),
1024                  le16_to_cpu(m->station_id), le16_to_cpu(m->ATIM_window),
1025                  m->CFP_mode, m->privacy_option_implemented, m->DTIM_period,
1026                  m->CFP_period, m->current_bssid,
1027                  IW_ESSID_MAX_SIZE, m->current_essid,
1028                  m->current_bss_type, m->power_mgmt_mode, m->ibss_change,
1029                  m->res, m->multi_domain_capability_implemented,
1030                  m->multi_domain_capability_enabled, m->country_string);
1031 exit:
1032         kfree(m);
1033 }
1034
1035 static void at76_dump_mib_mac(struct at76_priv *priv)
1036 {
1037         int ret;
1038         struct mib_mac *m = kmalloc(sizeof(struct mib_mac), GFP_KERNEL);
1039
1040         if (!m)
1041                 return;
1042
1043         ret = at76_get_mib(priv->udev, MIB_MAC, m, sizeof(struct mib_mac));
1044         if (ret < 0) {
1045                 wiphy_err(priv->hw->wiphy,
1046                           "at76_get_mib (MAC) failed: %d\n", ret);
1047                 goto exit;
1048         }
1049
1050         at76_dbg(DBG_MIB, "%s: MIB MAC: max_tx_msdu_lifetime %d "
1051                  "max_rx_lifetime %d frag_threshold %d rts_threshold %d "
1052                  "cwmin %d cwmax %d short_retry_time %d long_retry_time %d "
1053                  "scan_type %d scan_channel %d probe_delay %u "
1054                  "min_channel_time %d max_channel_time %d listen_int %d "
1055                  "desired_ssid %*phD desired_bssid %pM desired_bsstype %d",
1056                  wiphy_name(priv->hw->wiphy),
1057                  le32_to_cpu(m->max_tx_msdu_lifetime),
1058                  le32_to_cpu(m->max_rx_lifetime),
1059                  le16_to_cpu(m->frag_threshold), le16_to_cpu(m->rts_threshold),
1060                  le16_to_cpu(m->cwmin), le16_to_cpu(m->cwmax),
1061                  m->short_retry_time, m->long_retry_time, m->scan_type,
1062                  m->scan_channel, le16_to_cpu(m->probe_delay),
1063                  le16_to_cpu(m->min_channel_time),
1064                  le16_to_cpu(m->max_channel_time),
1065                  le16_to_cpu(m->listen_interval),
1066                  IW_ESSID_MAX_SIZE, m->desired_ssid,
1067                  m->desired_bssid, m->desired_bsstype);
1068 exit:
1069         kfree(m);
1070 }
1071
1072 static void at76_dump_mib_phy(struct at76_priv *priv)
1073 {
1074         int ret;
1075         struct mib_phy *m = kmalloc(sizeof(struct mib_phy), GFP_KERNEL);
1076
1077         if (!m)
1078                 return;
1079
1080         ret = at76_get_mib(priv->udev, MIB_PHY, m, sizeof(struct mib_phy));
1081         if (ret < 0) {
1082                 wiphy_err(priv->hw->wiphy,
1083                           "at76_get_mib (PHY) failed: %d\n", ret);
1084                 goto exit;
1085         }
1086
1087         at76_dbg(DBG_MIB, "%s: MIB PHY: ed_threshold %d slot_time %d "
1088                  "sifs_time %d preamble_length %d plcp_header_length %d "
1089                  "mpdu_max_length %d cca_mode_supported %d operation_rate_set "
1090                  "0x%x 0x%x 0x%x 0x%x channel_id %d current_cca_mode %d "
1091                  "phy_type %d current_reg_domain %d",
1092                  wiphy_name(priv->hw->wiphy), le32_to_cpu(m->ed_threshold),
1093                  le16_to_cpu(m->slot_time), le16_to_cpu(m->sifs_time),
1094                  le16_to_cpu(m->preamble_length),
1095                  le16_to_cpu(m->plcp_header_length),
1096                  le16_to_cpu(m->mpdu_max_length),
1097                  le16_to_cpu(m->cca_mode_supported), m->operation_rate_set[0],
1098                  m->operation_rate_set[1], m->operation_rate_set[2],
1099                  m->operation_rate_set[3], m->channel_id, m->current_cca_mode,
1100                  m->phy_type, m->current_reg_domain);
1101 exit:
1102         kfree(m);
1103 }
1104
1105 static void at76_dump_mib_local(struct at76_priv *priv)
1106 {
1107         int ret;
1108         struct mib_local *m = kmalloc(sizeof(*m), GFP_KERNEL);
1109
1110         if (!m)
1111                 return;
1112
1113         ret = at76_get_mib(priv->udev, MIB_LOCAL, m, sizeof(*m));
1114         if (ret < 0) {
1115                 wiphy_err(priv->hw->wiphy,
1116                           "at76_get_mib (LOCAL) failed: %d\n", ret);
1117                 goto exit;
1118         }
1119
1120         at76_dbg(DBG_MIB, "%s: MIB LOCAL: beacon_enable %d "
1121                  "txautorate_fallback %d ssid_size %d promiscuous_mode %d "
1122                  "preamble_type %d", wiphy_name(priv->hw->wiphy),
1123                  m->beacon_enable,
1124                  m->txautorate_fallback, m->ssid_size, m->promiscuous_mode,
1125                  m->preamble_type);
1126 exit:
1127         kfree(m);
1128 }
1129
1130 static void at76_dump_mib_mdomain(struct at76_priv *priv)
1131 {
1132         int ret;
1133         struct mib_mdomain *m = kmalloc(sizeof(struct mib_mdomain), GFP_KERNEL);
1134
1135         if (!m)
1136                 return;
1137
1138         ret = at76_get_mib(priv->udev, MIB_MDOMAIN, m,
1139                            sizeof(struct mib_mdomain));
1140         if (ret < 0) {
1141                 wiphy_err(priv->hw->wiphy,
1142                           "at76_get_mib (MDOMAIN) failed: %d\n", ret);
1143                 goto exit;
1144         }
1145
1146         at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: channel_list %*phD",
1147                  wiphy_name(priv->hw->wiphy),
1148                  (int)sizeof(m->channel_list), m->channel_list);
1149
1150         at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: tx_powerlevel %*phD",
1151                  wiphy_name(priv->hw->wiphy),
1152                  (int)sizeof(m->tx_powerlevel), m->tx_powerlevel);
1153 exit:
1154         kfree(m);
1155 }
1156
1157 /* Enable monitor mode */
1158 static int at76_start_monitor(struct at76_priv *priv)
1159 {
1160         struct at76_req_scan scan;
1161         int ret;
1162
1163         memset(&scan, 0, sizeof(struct at76_req_scan));
1164         eth_broadcast_addr(scan.bssid);
1165
1166         scan.channel = priv->channel;
1167         scan.scan_type = SCAN_TYPE_PASSIVE;
1168         scan.international_scan = 0;
1169         scan.min_channel_time = cpu_to_le16(priv->scan_min_time);
1170         scan.max_channel_time = cpu_to_le16(priv->scan_max_time);
1171         scan.probe_delay = cpu_to_le16(0);
1172
1173         ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
1174         if (ret >= 0)
1175                 ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
1176
1177         return ret;
1178 }
1179
1180 /* Calculate padding from txbuf->wlength (which excludes the USB TX header),
1181    likely to compensate a flaw in the AT76C503A USB part ... */
1182 static inline int at76_calc_padding(int wlen)
1183 {
1184         /* add the USB TX header */
1185         wlen += AT76_TX_HDRLEN;
1186
1187         wlen = wlen % 64;
1188
1189         if (wlen < 50)
1190                 return 50 - wlen;
1191
1192         if (wlen >= 61)
1193                 return 64 + 50 - wlen;
1194
1195         return 0;
1196 }
1197
1198 static void at76_rx_callback(struct urb *urb)
1199 {
1200         struct at76_priv *priv = urb->context;
1201
1202         priv->rx_tasklet.data = (unsigned long)urb;
1203         tasklet_schedule(&priv->rx_tasklet);
1204 }
1205
1206 static int at76_submit_rx_urb(struct at76_priv *priv)
1207 {
1208         int ret;
1209         int size;
1210         struct sk_buff *skb = priv->rx_skb;
1211
1212         if (!priv->rx_urb) {
1213                 wiphy_err(priv->hw->wiphy, "%s: priv->rx_urb is NULL\n",
1214                           __func__);
1215                 return -EFAULT;
1216         }
1217
1218         if (!skb) {
1219                 skb = dev_alloc_skb(sizeof(struct at76_rx_buffer));
1220                 if (!skb) {
1221                         wiphy_err(priv->hw->wiphy,
1222                                   "cannot allocate rx skbuff\n");
1223                         ret = -ENOMEM;
1224                         goto exit;
1225                 }
1226                 priv->rx_skb = skb;
1227         } else {
1228                 skb_push(skb, skb_headroom(skb));
1229                 skb_trim(skb, 0);
1230         }
1231
1232         size = skb_tailroom(skb);
1233         usb_fill_bulk_urb(priv->rx_urb, priv->udev, priv->rx_pipe,
1234                           skb_put(skb, size), size, at76_rx_callback, priv);
1235         ret = usb_submit_urb(priv->rx_urb, GFP_ATOMIC);
1236         if (ret < 0) {
1237                 if (ret == -ENODEV)
1238                         at76_dbg(DBG_DEVSTART,
1239                                  "usb_submit_urb returned -ENODEV");
1240                 else
1241                         wiphy_err(priv->hw->wiphy,
1242                                   "rx, usb_submit_urb failed: %d\n", ret);
1243         }
1244
1245 exit:
1246         if (ret < 0 && ret != -ENODEV)
1247                 wiphy_err(priv->hw->wiphy,
1248                           "cannot submit rx urb - please unload the driver and/or power cycle the device\n");
1249
1250         return ret;
1251 }
1252
1253 /* Download external firmware */
1254 static int at76_load_external_fw(struct usb_device *udev, struct fwentry *fwe)
1255 {
1256         int ret;
1257         int op_mode;
1258         int blockno = 0;
1259         int bsize;
1260         u8 *block;
1261         u8 *buf = fwe->extfw;
1262         int size = fwe->extfw_size;
1263
1264         if (!buf || !size)
1265                 return -ENOENT;
1266
1267         op_mode = at76_get_op_mode(udev);
1268         at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
1269
1270         if (op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
1271                 dev_err(&udev->dev, "unexpected opmode %d\n", op_mode);
1272                 return -EINVAL;
1273         }
1274
1275         block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
1276         if (!block)
1277                 return -ENOMEM;
1278
1279         at76_dbg(DBG_DEVSTART, "downloading external firmware");
1280
1281         /* for fw >= 0.100, the device needs an extra empty block */
1282         do {
1283                 bsize = min_t(int, size, FW_BLOCK_SIZE);
1284                 memcpy(block, buf, bsize);
1285                 at76_dbg(DBG_DEVSTART,
1286                          "ext fw, size left = %5d, bsize = %4d, blockno = %2d",
1287                          size, bsize, blockno);
1288                 ret = at76_load_ext_fw_block(udev, blockno, block, bsize);
1289                 if (ret != bsize) {
1290                         dev_err(&udev->dev,
1291                                 "loading %dth firmware block failed: %d\n",
1292                                 blockno, ret);
1293                         ret = -EIO;
1294                         goto exit;
1295                 }
1296                 buf += bsize;
1297                 size -= bsize;
1298                 blockno++;
1299         } while (bsize > 0);
1300
1301         if (at76_is_505a(fwe->board_type)) {
1302                 at76_dbg(DBG_DEVSTART, "200 ms delay for 505a");
1303                 schedule_timeout_interruptible(HZ / 5 + 1);
1304         }
1305
1306 exit:
1307         kfree(block);
1308         if (ret < 0)
1309                 dev_err(&udev->dev,
1310                         "downloading external firmware failed: %d\n", ret);
1311         return ret;
1312 }
1313
1314 /* Download internal firmware */
1315 static int at76_load_internal_fw(struct usb_device *udev, struct fwentry *fwe)
1316 {
1317         int ret;
1318         int need_remap = !at76_is_505a(fwe->board_type);
1319
1320         ret = at76_usbdfu_download(udev, fwe->intfw, fwe->intfw_size,
1321                                    need_remap ? 0 : 2 * HZ);
1322
1323         if (ret < 0) {
1324                 dev_err(&udev->dev,
1325                         "downloading internal fw failed with %d\n", ret);
1326                 goto exit;
1327         }
1328
1329         at76_dbg(DBG_DEVSTART, "sending REMAP");
1330
1331         /* no REMAP for 505A (see SF driver) */
1332         if (need_remap) {
1333                 ret = at76_remap(udev);
1334                 if (ret < 0) {
1335                         dev_err(&udev->dev,
1336                                 "sending REMAP failed with %d\n", ret);
1337                         goto exit;
1338                 }
1339         }
1340
1341         at76_dbg(DBG_DEVSTART, "sleeping for 2 seconds");
1342         schedule_timeout_interruptible(2 * HZ + 1);
1343         usb_reset_device(udev);
1344
1345 exit:
1346         return ret;
1347 }
1348
1349 static int at76_startup_device(struct at76_priv *priv)
1350 {
1351         struct at76_card_config *ccfg = &priv->card_config;
1352         int ret;
1353
1354         at76_dbg(DBG_PARAMS,
1355                  "%s param: ssid %.*s (%*phD) mode %s ch %d wep %s key %d "
1356                  "keylen %d", wiphy_name(priv->hw->wiphy), priv->essid_size,
1357                  priv->essid, IW_ESSID_MAX_SIZE, priv->essid,
1358                  priv->iw_mode == IW_MODE_ADHOC ? "adhoc" : "infra",
1359                  priv->channel, priv->wep_enabled ? "enabled" : "disabled",
1360                  priv->wep_key_id, priv->wep_keys_len[priv->wep_key_id]);
1361         at76_dbg(DBG_PARAMS,
1362                  "%s param: preamble %s rts %d retry %d frag %d "
1363                  "txrate %s auth_mode %d", wiphy_name(priv->hw->wiphy),
1364                  preambles[priv->preamble_type], priv->rts_threshold,
1365                  priv->short_retry_limit, priv->frag_threshold,
1366                  priv->txrate == TX_RATE_1MBIT ? "1MBit" : priv->txrate ==
1367                  TX_RATE_2MBIT ? "2MBit" : priv->txrate ==
1368                  TX_RATE_5_5MBIT ? "5.5MBit" : priv->txrate ==
1369                  TX_RATE_11MBIT ? "11MBit" : priv->txrate ==
1370                  TX_RATE_AUTO ? "auto" : "<invalid>", priv->auth_mode);
1371         at76_dbg(DBG_PARAMS,
1372                  "%s param: pm_mode %d pm_period %d auth_mode %s "
1373                  "scan_times %d %d scan_mode %s",
1374                  wiphy_name(priv->hw->wiphy), priv->pm_mode, priv->pm_period,
1375                  priv->auth_mode == WLAN_AUTH_OPEN ? "open" : "shared_secret",
1376                  priv->scan_min_time, priv->scan_max_time,
1377                  priv->scan_mode == SCAN_TYPE_ACTIVE ? "active" : "passive");
1378
1379         memset(ccfg, 0, sizeof(struct at76_card_config));
1380         ccfg->promiscuous_mode = 0;
1381         ccfg->short_retry_limit = priv->short_retry_limit;
1382
1383         if (priv->wep_enabled) {
1384                 if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
1385                         ccfg->encryption_type = 2;
1386                 else
1387                         ccfg->encryption_type = 1;
1388
1389                 /* jal: always exclude unencrypted if WEP is active */
1390                 ccfg->exclude_unencrypted = 1;
1391         } else {
1392                 ccfg->exclude_unencrypted = 0;
1393                 ccfg->encryption_type = 0;
1394         }
1395
1396         ccfg->rts_threshold = cpu_to_le16(priv->rts_threshold);
1397         ccfg->fragmentation_threshold = cpu_to_le16(priv->frag_threshold);
1398
1399         memcpy(ccfg->basic_rate_set, hw_rates, 4);
1400         /* jal: really needed, we do a set_mib for autorate later ??? */
1401         ccfg->auto_rate_fallback = (priv->txrate == TX_RATE_AUTO ? 1 : 0);
1402         ccfg->channel = priv->channel;
1403         ccfg->privacy_invoked = priv->wep_enabled;
1404         memcpy(ccfg->current_ssid, priv->essid, IW_ESSID_MAX_SIZE);
1405         ccfg->ssid_len = priv->essid_size;
1406
1407         ccfg->wep_default_key_id = priv->wep_key_id;
1408         memcpy(ccfg->wep_default_key_value, priv->wep_keys,
1409                sizeof(priv->wep_keys));
1410
1411         ccfg->short_preamble = priv->preamble_type;
1412         ccfg->beacon_period = cpu_to_le16(priv->beacon_period);
1413
1414         ret = at76_set_card_command(priv->udev, CMD_STARTUP, &priv->card_config,
1415                                     sizeof(struct at76_card_config));
1416         if (ret < 0) {
1417                 wiphy_err(priv->hw->wiphy, "at76_set_card_command failed: %d\n",
1418                           ret);
1419                 return ret;
1420         }
1421
1422         at76_wait_completion(priv, CMD_STARTUP);
1423
1424         /* remove BSSID from previous run */
1425         eth_zero_addr(priv->bssid);
1426
1427         priv->scanning = false;
1428
1429         if (at76_set_radio(priv, 1) == 1)
1430                 at76_wait_completion(priv, CMD_RADIO_ON);
1431
1432         ret = at76_set_preamble(priv, priv->preamble_type);
1433         if (ret < 0)
1434                 return ret;
1435
1436         ret = at76_set_frag(priv, priv->frag_threshold);
1437         if (ret < 0)
1438                 return ret;
1439
1440         ret = at76_set_rts(priv, priv->rts_threshold);
1441         if (ret < 0)
1442                 return ret;
1443
1444         ret = at76_set_autorate_fallback(priv,
1445                                          priv->txrate == TX_RATE_AUTO ? 1 : 0);
1446         if (ret < 0)
1447                 return ret;
1448
1449         ret = at76_set_pm_mode(priv);
1450         if (ret < 0)
1451                 return ret;
1452
1453         if (at76_debug & DBG_MIB) {
1454                 at76_dump_mib_mac(priv);
1455                 at76_dump_mib_mac_addr(priv);
1456                 at76_dump_mib_mac_mgmt(priv);
1457                 at76_dump_mib_mac_wep(priv);
1458                 at76_dump_mib_mdomain(priv);
1459                 at76_dump_mib_phy(priv);
1460                 at76_dump_mib_local(priv);
1461         }
1462
1463         return 0;
1464 }
1465
1466 /* Enable or disable promiscuous mode */
1467 static void at76_work_set_promisc(struct work_struct *work)
1468 {
1469         struct at76_priv *priv = container_of(work, struct at76_priv,
1470                                               work_set_promisc);
1471         int ret = 0;
1472
1473         if (priv->device_unplugged)
1474                 return;
1475
1476         mutex_lock(&priv->mtx);
1477
1478         priv->mib_buf.type = MIB_LOCAL;
1479         priv->mib_buf.size = 1;
1480         priv->mib_buf.index = offsetof(struct mib_local, promiscuous_mode);
1481         priv->mib_buf.data.byte = priv->promisc ? 1 : 0;
1482
1483         ret = at76_set_mib(priv, &priv->mib_buf);
1484         if (ret < 0)
1485                 wiphy_err(priv->hw->wiphy,
1486                           "set_mib (promiscuous_mode) failed: %d\n", ret);
1487
1488         mutex_unlock(&priv->mtx);
1489 }
1490
1491 /* Submit Rx urb back to the device */
1492 static void at76_work_submit_rx(struct work_struct *work)
1493 {
1494         struct at76_priv *priv = container_of(work, struct at76_priv,
1495                                               work_submit_rx);
1496
1497         mutex_lock(&priv->mtx);
1498         at76_submit_rx_urb(priv);
1499         mutex_unlock(&priv->mtx);
1500 }
1501
1502 /* This is a workaround to make scan working:
1503  * currently mac80211 does not process frames with no frequency
1504  * information.
1505  * However during scan the HW performs a sweep by itself, and we
1506  * are unable to know where the radio is actually tuned.
1507  * This function tries to do its best to guess this information..
1508  * During scan, If the current frame is a beacon or a probe response,
1509  * the channel information is extracted from it.
1510  * When not scanning, for other frames, or if it happens that for
1511  * whatever reason we fail to parse beacons and probe responses, this
1512  * function returns the priv->channel information, that should be correct
1513  * at least when we are not scanning.
1514  */
1515 static inline int at76_guess_freq(struct at76_priv *priv)
1516 {
1517         size_t el_off;
1518         const u8 *el;
1519         int channel = priv->channel;
1520         int len = priv->rx_skb->len;
1521         struct ieee80211_hdr *hdr = (void *)priv->rx_skb->data;
1522
1523         if (!priv->scanning)
1524                 goto exit;
1525
1526         if (len < 24)
1527                 goto exit;
1528
1529         if (ieee80211_is_probe_resp(hdr->frame_control)) {
1530                 el_off = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
1531                 el = ((struct ieee80211_mgmt *)hdr)->u.probe_resp.variable;
1532         } else if (ieee80211_is_beacon(hdr->frame_control)) {
1533                 el_off = offsetof(struct ieee80211_mgmt, u.beacon.variable);
1534                 el = ((struct ieee80211_mgmt *)hdr)->u.beacon.variable;
1535         } else {
1536                 goto exit;
1537         }
1538         len -= el_off;
1539
1540         el = cfg80211_find_ie(WLAN_EID_DS_PARAMS, el, len);
1541         if (el && el[1] > 0)
1542                 channel = el[2];
1543
1544 exit:
1545         return ieee80211_channel_to_frequency(channel, NL80211_BAND_2GHZ);
1546 }
1547
1548 static void at76_rx_tasklet(unsigned long param)
1549 {
1550         struct urb *urb = (struct urb *)param;
1551         struct at76_priv *priv = urb->context;
1552         struct at76_rx_buffer *buf;
1553         struct ieee80211_rx_status rx_status = { 0 };
1554
1555         if (priv->device_unplugged) {
1556                 at76_dbg(DBG_DEVSTART, "device unplugged");
1557                 at76_dbg(DBG_DEVSTART, "urb status %d", urb->status);
1558                 return;
1559         }
1560
1561         if (!priv->rx_skb || !priv->rx_skb->data)
1562                 return;
1563
1564         buf = (struct at76_rx_buffer *)priv->rx_skb->data;
1565
1566         if (urb->status != 0) {
1567                 if (urb->status != -ENOENT && urb->status != -ECONNRESET)
1568                         at76_dbg(DBG_URB,
1569                                  "%s %s: - nonzero Rx bulk status received: %d",
1570                                  __func__, wiphy_name(priv->hw->wiphy),
1571                                  urb->status);
1572                 return;
1573         }
1574
1575         at76_dbg(DBG_RX_ATMEL_HDR,
1576                  "%s: rx frame: rate %d rssi %d noise %d link %d",
1577                  wiphy_name(priv->hw->wiphy), buf->rx_rate, buf->rssi,
1578                  buf->noise_level, buf->link_quality);
1579
1580         skb_pull(priv->rx_skb, AT76_RX_HDRLEN);
1581         skb_trim(priv->rx_skb, le16_to_cpu(buf->wlength));
1582         at76_dbg_dump(DBG_RX_DATA, priv->rx_skb->data,
1583                       priv->rx_skb->len, "RX: len=%d", priv->rx_skb->len);
1584
1585         rx_status.signal = buf->rssi;
1586         rx_status.flag |= RX_FLAG_DECRYPTED;
1587         rx_status.flag |= RX_FLAG_IV_STRIPPED;
1588         rx_status.band = NL80211_BAND_2GHZ;
1589         rx_status.freq = at76_guess_freq(priv);
1590
1591         at76_dbg(DBG_MAC80211, "calling ieee80211_rx_irqsafe(): %d/%d",
1592                  priv->rx_skb->len, priv->rx_skb->data_len);
1593         memcpy(IEEE80211_SKB_RXCB(priv->rx_skb), &rx_status, sizeof(rx_status));
1594         ieee80211_rx_irqsafe(priv->hw, priv->rx_skb);
1595
1596         /* Use a new skb for the next receive */
1597         priv->rx_skb = NULL;
1598
1599         at76_submit_rx_urb(priv);
1600 }
1601
1602 /* Load firmware into kernel memory and parse it */
1603 static struct fwentry *at76_load_firmware(struct usb_device *udev,
1604                                           enum board_type board_type)
1605 {
1606         int ret;
1607         char *str;
1608         struct at76_fw_header *fwh;
1609         struct fwentry *fwe = &firmwares[board_type];
1610
1611         mutex_lock(&fw_mutex);
1612
1613         if (fwe->loaded) {
1614                 at76_dbg(DBG_FW, "re-using previously loaded fw");
1615                 goto exit;
1616         }
1617
1618         at76_dbg(DBG_FW, "downloading firmware %s", fwe->fwname);
1619         ret = request_firmware(&fwe->fw, fwe->fwname, &udev->dev);
1620         if (ret < 0) {
1621                 dev_err(&udev->dev, "firmware %s not found!\n",
1622                         fwe->fwname);
1623                 dev_err(&udev->dev,
1624                         "you may need to download the firmware from http://developer.berlios.de/projects/at76c503a/\n");
1625                 goto exit;
1626         }
1627
1628         at76_dbg(DBG_FW, "got it.");
1629         fwh = (struct at76_fw_header *)(fwe->fw->data);
1630
1631         if (fwe->fw->size <= sizeof(*fwh)) {
1632                 dev_err(&udev->dev,
1633                         "firmware is too short (0x%zx)\n", fwe->fw->size);
1634                 goto exit;
1635         }
1636
1637         /* CRC currently not checked */
1638         fwe->board_type = le32_to_cpu(fwh->board_type);
1639         if (fwe->board_type != board_type) {
1640                 dev_err(&udev->dev,
1641                         "board type mismatch, requested %u, got %u\n",
1642                         board_type, fwe->board_type);
1643                 goto exit;
1644         }
1645
1646         fwe->fw_version.major = fwh->major;
1647         fwe->fw_version.minor = fwh->minor;
1648         fwe->fw_version.patch = fwh->patch;
1649         fwe->fw_version.build = fwh->build;
1650
1651         str = (char *)fwh + le32_to_cpu(fwh->str_offset);
1652         fwe->intfw = (u8 *)fwh + le32_to_cpu(fwh->int_fw_offset);
1653         fwe->intfw_size = le32_to_cpu(fwh->int_fw_len);
1654         fwe->extfw = (u8 *)fwh + le32_to_cpu(fwh->ext_fw_offset);
1655         fwe->extfw_size = le32_to_cpu(fwh->ext_fw_len);
1656
1657         fwe->loaded = 1;
1658
1659         dev_printk(KERN_DEBUG, &udev->dev,
1660                    "using firmware %s (version %d.%d.%d-%d)\n",
1661                    fwe->fwname, fwh->major, fwh->minor, fwh->patch, fwh->build);
1662
1663         at76_dbg(DBG_DEVSTART, "board %u, int %d:%d, ext %d:%d", board_type,
1664                  le32_to_cpu(fwh->int_fw_offset), le32_to_cpu(fwh->int_fw_len),
1665                  le32_to_cpu(fwh->ext_fw_offset), le32_to_cpu(fwh->ext_fw_len));
1666         at76_dbg(DBG_DEVSTART, "firmware id %s", str);
1667
1668 exit:
1669         mutex_unlock(&fw_mutex);
1670
1671         if (fwe->loaded)
1672                 return fwe;
1673         else
1674                 return NULL;
1675 }
1676
1677 static int at76_join(struct at76_priv *priv)
1678 {
1679         struct at76_req_join join;
1680         int ret;
1681
1682         memset(&join, 0, sizeof(struct at76_req_join));
1683         memcpy(join.essid, priv->essid, priv->essid_size);
1684         join.essid_size = priv->essid_size;
1685         memcpy(join.bssid, priv->bssid, ETH_ALEN);
1686         join.bss_type = INFRASTRUCTURE_MODE;
1687         join.channel = priv->channel;
1688         join.timeout = cpu_to_le16(2000);
1689
1690         at76_dbg(DBG_MAC80211, "%s: sending CMD_JOIN", __func__);
1691         ret = at76_set_card_command(priv->udev, CMD_JOIN, &join,
1692                                     sizeof(struct at76_req_join));
1693
1694         if (ret < 0) {
1695                 wiphy_err(priv->hw->wiphy, "at76_set_card_command failed: %d\n",
1696                           ret);
1697                 return 0;
1698         }
1699
1700         ret = at76_wait_completion(priv, CMD_JOIN);
1701         at76_dbg(DBG_MAC80211, "%s: CMD_JOIN returned: 0x%02x", __func__, ret);
1702         if (ret != CMD_STATUS_COMPLETE) {
1703                 wiphy_err(priv->hw->wiphy, "at76_wait_completion failed: %d\n",
1704                           ret);
1705                 return 0;
1706         }
1707
1708         at76_set_pm_mode(priv);
1709
1710         return 0;
1711 }
1712
1713 static void at76_work_join_bssid(struct work_struct *work)
1714 {
1715         struct at76_priv *priv = container_of(work, struct at76_priv,
1716                                               work_join_bssid);
1717
1718         if (priv->device_unplugged)
1719                 return;
1720
1721         mutex_lock(&priv->mtx);
1722
1723         if (is_valid_ether_addr(priv->bssid))
1724                 at76_join(priv);
1725
1726         mutex_unlock(&priv->mtx);
1727 }
1728
1729 static void at76_mac80211_tx_callback(struct urb *urb)
1730 {
1731         struct at76_priv *priv = urb->context;
1732         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
1733
1734         at76_dbg(DBG_MAC80211, "%s()", __func__);
1735
1736         switch (urb->status) {
1737         case 0:
1738                 /* success */
1739                 info->flags |= IEEE80211_TX_STAT_ACK;
1740                 break;
1741         case -ENOENT:
1742         case -ECONNRESET:
1743                 /* fail, urb has been unlinked */
1744                 /* FIXME: add error message */
1745                 break;
1746         default:
1747                 at76_dbg(DBG_URB, "%s - nonzero tx status received: %d",
1748                          __func__, urb->status);
1749                 break;
1750         }
1751
1752         memset(&info->status, 0, sizeof(info->status));
1753
1754         ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
1755
1756         priv->tx_skb = NULL;
1757
1758         ieee80211_wake_queues(priv->hw);
1759 }
1760
1761 static void at76_mac80211_tx(struct ieee80211_hw *hw,
1762                              struct ieee80211_tx_control *control,
1763                              struct sk_buff *skb)
1764 {
1765         struct at76_priv *priv = hw->priv;
1766         struct at76_tx_buffer *tx_buffer = priv->bulk_out_buffer;
1767         struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1768         struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1769         int padding, submit_len, ret;
1770
1771         at76_dbg(DBG_MAC80211, "%s()", __func__);
1772
1773         if (priv->tx_urb->status == -EINPROGRESS) {
1774                 wiphy_err(priv->hw->wiphy,
1775                           "%s called while tx urb is pending\n", __func__);
1776                 dev_kfree_skb_any(skb);
1777                 return;
1778         }
1779
1780         /* The following code lines are important when the device is going to
1781          * authenticate with a new bssid. The driver must send CMD_JOIN before
1782          * an authentication frame is transmitted. For this to succeed, the
1783          * correct bssid of the AP must be known. As mac80211 does not inform
1784          * drivers about the bssid prior to the authentication process the
1785          * following workaround is necessary. If the TX frame is an
1786          * authentication frame extract the bssid and send the CMD_JOIN. */
1787         if (mgmt->frame_control & cpu_to_le16(IEEE80211_STYPE_AUTH)) {
1788                 if (!ether_addr_equal_64bits(priv->bssid, mgmt->bssid)) {
1789                         memcpy(priv->bssid, mgmt->bssid, ETH_ALEN);
1790                         ieee80211_queue_work(hw, &priv->work_join_bssid);
1791                         dev_kfree_skb_any(skb);
1792                         return;
1793                 }
1794         }
1795
1796         ieee80211_stop_queues(hw);
1797
1798         at76_ledtrig_tx_activity();     /* tell ledtrigger we send a packet */
1799
1800         WARN_ON(priv->tx_skb != NULL);
1801
1802         priv->tx_skb = skb;
1803         padding = at76_calc_padding(skb->len);
1804         submit_len = AT76_TX_HDRLEN + skb->len + padding;
1805
1806         /* setup 'Atmel' header */
1807         memset(tx_buffer, 0, sizeof(*tx_buffer));
1808         tx_buffer->padding = padding;
1809         tx_buffer->wlength = cpu_to_le16(skb->len);
1810         tx_buffer->tx_rate = ieee80211_get_tx_rate(hw, info)->hw_value;
1811         memset(tx_buffer->reserved, 0, sizeof(tx_buffer->reserved));
1812         memcpy(tx_buffer->packet, skb->data, skb->len);
1813
1814         at76_dbg(DBG_TX_DATA, "%s tx: wlen 0x%x pad 0x%x rate %d hdr",
1815                  wiphy_name(priv->hw->wiphy), le16_to_cpu(tx_buffer->wlength),
1816                  tx_buffer->padding, tx_buffer->tx_rate);
1817
1818         /* send stuff */
1819         at76_dbg_dump(DBG_TX_DATA_CONTENT, tx_buffer, submit_len,
1820                       "%s(): tx_buffer %d bytes:", __func__, submit_len);
1821         usb_fill_bulk_urb(priv->tx_urb, priv->udev, priv->tx_pipe, tx_buffer,
1822                           submit_len, at76_mac80211_tx_callback, priv);
1823         ret = usb_submit_urb(priv->tx_urb, GFP_ATOMIC);
1824         if (ret) {
1825                 wiphy_err(priv->hw->wiphy, "error in tx submit urb: %d\n", ret);
1826                 if (ret == -EINVAL)
1827                         wiphy_err(priv->hw->wiphy,
1828                                   "-EINVAL: tx urb %p hcpriv %p complete %p\n",
1829                                   priv->tx_urb,
1830                                   priv->tx_urb->hcpriv, priv->tx_urb->complete);
1831         }
1832 }
1833
1834 static int at76_mac80211_start(struct ieee80211_hw *hw)
1835 {
1836         struct at76_priv *priv = hw->priv;
1837         int ret;
1838
1839         at76_dbg(DBG_MAC80211, "%s()", __func__);
1840
1841         mutex_lock(&priv->mtx);
1842
1843         ret = at76_submit_rx_urb(priv);
1844         if (ret < 0) {
1845                 wiphy_err(priv->hw->wiphy, "open: submit_rx_urb failed: %d\n",
1846                           ret);
1847                 goto error;
1848         }
1849
1850         at76_startup_device(priv);
1851
1852         at76_start_monitor(priv);
1853
1854 error:
1855         mutex_unlock(&priv->mtx);
1856
1857         return 0;
1858 }
1859
1860 static void at76_mac80211_stop(struct ieee80211_hw *hw)
1861 {
1862         struct at76_priv *priv = hw->priv;
1863
1864         at76_dbg(DBG_MAC80211, "%s()", __func__);
1865
1866         cancel_delayed_work(&priv->dwork_hw_scan);
1867         cancel_work_sync(&priv->work_join_bssid);
1868         cancel_work_sync(&priv->work_set_promisc);
1869
1870         mutex_lock(&priv->mtx);
1871
1872         if (!priv->device_unplugged) {
1873                 /* We are called by "ifconfig ethX down", not because the
1874                  * device is not available anymore. */
1875                 at76_set_radio(priv, 0);
1876
1877                 /* We unlink rx_urb because at76_open() re-submits it.
1878                  * If unplugged, at76_delete_device() takes care of it. */
1879                 usb_kill_urb(priv->rx_urb);
1880         }
1881
1882         mutex_unlock(&priv->mtx);
1883 }
1884
1885 static int at76_add_interface(struct ieee80211_hw *hw,
1886                               struct ieee80211_vif *vif)
1887 {
1888         struct at76_priv *priv = hw->priv;
1889         int ret = 0;
1890
1891         at76_dbg(DBG_MAC80211, "%s()", __func__);
1892
1893         mutex_lock(&priv->mtx);
1894
1895         switch (vif->type) {
1896         case NL80211_IFTYPE_STATION:
1897                 priv->iw_mode = IW_MODE_INFRA;
1898                 break;
1899         default:
1900                 ret = -EOPNOTSUPP;
1901                 goto exit;
1902         }
1903
1904 exit:
1905         mutex_unlock(&priv->mtx);
1906
1907         return ret;
1908 }
1909
1910 static void at76_remove_interface(struct ieee80211_hw *hw,
1911                                   struct ieee80211_vif *vif)
1912 {
1913         at76_dbg(DBG_MAC80211, "%s()", __func__);
1914 }
1915
1916 static void at76_dwork_hw_scan(struct work_struct *work)
1917 {
1918         struct at76_priv *priv = container_of(work, struct at76_priv,
1919                                               dwork_hw_scan.work);
1920         struct cfg80211_scan_info info = {
1921                 .aborted = false,
1922         };
1923         int ret;
1924
1925         if (priv->device_unplugged)
1926                 return;
1927
1928         mutex_lock(&priv->mtx);
1929
1930         ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
1931         at76_dbg(DBG_MAC80211, "%s: CMD_SCAN status 0x%02x", __func__, ret);
1932
1933         /* FIXME: add maximum time for scan to complete */
1934
1935         if (ret != CMD_STATUS_COMPLETE) {
1936                 ieee80211_queue_delayed_work(priv->hw, &priv->dwork_hw_scan,
1937                                              SCAN_POLL_INTERVAL);
1938                 mutex_unlock(&priv->mtx);
1939                 return;
1940         }
1941
1942         if (is_valid_ether_addr(priv->bssid))
1943                 at76_join(priv);
1944
1945         priv->scanning = false;
1946
1947         mutex_unlock(&priv->mtx);
1948
1949         ieee80211_scan_completed(priv->hw, &info);
1950
1951         ieee80211_wake_queues(priv->hw);
1952 }
1953
1954 static int at76_hw_scan(struct ieee80211_hw *hw,
1955                         struct ieee80211_vif *vif,
1956                         struct ieee80211_scan_request *hw_req)
1957 {
1958         struct cfg80211_scan_request *req = &hw_req->req;
1959         struct at76_priv *priv = hw->priv;
1960         struct at76_req_scan scan;
1961         u8 *ssid = NULL;
1962         int ret, len = 0;
1963
1964         at76_dbg(DBG_MAC80211, "%s():", __func__);
1965
1966         if (priv->device_unplugged)
1967                 return 0;
1968
1969         mutex_lock(&priv->mtx);
1970
1971         ieee80211_stop_queues(hw);
1972
1973         memset(&scan, 0, sizeof(struct at76_req_scan));
1974         eth_broadcast_addr(scan.bssid);
1975
1976         if (req->n_ssids) {
1977                 scan.scan_type = SCAN_TYPE_ACTIVE;
1978                 ssid = req->ssids[0].ssid;
1979                 len = req->ssids[0].ssid_len;
1980         } else {
1981                 scan.scan_type = SCAN_TYPE_PASSIVE;
1982         }
1983
1984         if (len) {
1985                 memcpy(scan.essid, ssid, len);
1986                 scan.essid_size = len;
1987         }
1988
1989         scan.min_channel_time = cpu_to_le16(priv->scan_min_time);
1990         scan.max_channel_time = cpu_to_le16(priv->scan_max_time);
1991         scan.probe_delay = cpu_to_le16(priv->scan_min_time * 1000);
1992         scan.international_scan = 0;
1993
1994         at76_dbg(DBG_MAC80211, "%s: sending CMD_SCAN", __func__);
1995         ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
1996
1997         if (ret < 0) {
1998                 wiphy_err(priv->hw->wiphy, "CMD_SCAN failed: %d\n", ret);
1999                 goto exit;
2000         }
2001
2002         priv->scanning = true;
2003         ieee80211_queue_delayed_work(priv->hw, &priv->dwork_hw_scan,
2004                                      SCAN_POLL_INTERVAL);
2005
2006 exit:
2007         mutex_unlock(&priv->mtx);
2008
2009         return 0;
2010 }
2011
2012 static int at76_config(struct ieee80211_hw *hw, u32 changed)
2013 {
2014         struct at76_priv *priv = hw->priv;
2015
2016         at76_dbg(DBG_MAC80211, "%s(): channel %d",
2017                  __func__, hw->conf.chandef.chan->hw_value);
2018         at76_dbg_dump(DBG_MAC80211, priv->bssid, ETH_ALEN, "bssid:");
2019
2020         mutex_lock(&priv->mtx);
2021
2022         priv->channel = hw->conf.chandef.chan->hw_value;
2023
2024         if (is_valid_ether_addr(priv->bssid))
2025                 at76_join(priv);
2026         else
2027                 at76_start_monitor(priv);
2028
2029         mutex_unlock(&priv->mtx);
2030
2031         return 0;
2032 }
2033
2034 static void at76_bss_info_changed(struct ieee80211_hw *hw,
2035                                   struct ieee80211_vif *vif,
2036                                   struct ieee80211_bss_conf *conf,
2037                                   u32 changed)
2038 {
2039         struct at76_priv *priv = hw->priv;
2040
2041         at76_dbg(DBG_MAC80211, "%s():", __func__);
2042
2043         if (!(changed & BSS_CHANGED_BSSID))
2044                 return;
2045
2046         at76_dbg_dump(DBG_MAC80211, conf->bssid, ETH_ALEN, "bssid:");
2047
2048         mutex_lock(&priv->mtx);
2049
2050         memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2051
2052         if (is_valid_ether_addr(priv->bssid))
2053                 /* mac80211 is joining a bss */
2054                 at76_join(priv);
2055
2056         mutex_unlock(&priv->mtx);
2057 }
2058
2059 /* must be atomic */
2060 static void at76_configure_filter(struct ieee80211_hw *hw,
2061                                   unsigned int changed_flags,
2062                                   unsigned int *total_flags, u64 multicast)
2063 {
2064         struct at76_priv *priv = hw->priv;
2065         int flags;
2066
2067         at76_dbg(DBG_MAC80211, "%s(): changed_flags=0x%08x "
2068                  "total_flags=0x%08x",
2069                  __func__, changed_flags, *total_flags);
2070
2071         flags = changed_flags & AT76_SUPPORTED_FILTERS;
2072         *total_flags = AT76_SUPPORTED_FILTERS;
2073
2074         /* Bail out after updating flags to prevent a WARN_ON in mac80211. */
2075         if (priv->device_unplugged)
2076                 return;
2077
2078         /* FIXME: access to priv->promisc should be protected with
2079          * priv->mtx, but it's impossible because this function needs to be
2080          * atomic */
2081
2082         if (flags && !priv->promisc) {
2083                 /* mac80211 wants us to enable promiscuous mode */
2084                 priv->promisc = 1;
2085         } else if (!flags && priv->promisc) {
2086                 /* we need to disable promiscuous mode */
2087                 priv->promisc = 0;
2088         } else
2089                 return;
2090
2091         ieee80211_queue_work(hw, &priv->work_set_promisc);
2092 }
2093
2094 static int at76_set_wep(struct at76_priv *priv)
2095 {
2096         int ret = 0;
2097         struct mib_mac_wep *mib_data = &priv->mib_buf.data.wep_mib;
2098
2099         priv->mib_buf.type = MIB_MAC_WEP;
2100         priv->mib_buf.size = sizeof(struct mib_mac_wep);
2101         priv->mib_buf.index = 0;
2102
2103         memset(mib_data, 0, sizeof(*mib_data));
2104
2105         if (priv->wep_enabled) {
2106                 if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
2107                         mib_data->encryption_level = 2;
2108                 else
2109                         mib_data->encryption_level = 1;
2110
2111                 /* always exclude unencrypted if WEP is active */
2112                 mib_data->exclude_unencrypted = 1;
2113         } else {
2114                 mib_data->exclude_unencrypted = 0;
2115                 mib_data->encryption_level = 0;
2116         }
2117
2118         mib_data->privacy_invoked = priv->wep_enabled;
2119         mib_data->wep_default_key_id = priv->wep_key_id;
2120         memcpy(mib_data->wep_default_keyvalue, priv->wep_keys,
2121                sizeof(priv->wep_keys));
2122
2123         ret = at76_set_mib(priv, &priv->mib_buf);
2124
2125         if (ret < 0)
2126                 wiphy_err(priv->hw->wiphy,
2127                           "set_mib (wep) failed: %d\n", ret);
2128
2129         return ret;
2130 }
2131
2132 static int at76_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2133                         struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2134                         struct ieee80211_key_conf *key)
2135 {
2136         struct at76_priv *priv = hw->priv;
2137
2138         int i;
2139
2140         at76_dbg(DBG_MAC80211, "%s(): cmd %d key->cipher %d key->keyidx %d "
2141                  "key->keylen %d",
2142                  __func__, cmd, key->cipher, key->keyidx, key->keylen);
2143
2144         if ((key->cipher != WLAN_CIPHER_SUITE_WEP40) &&
2145             (key->cipher != WLAN_CIPHER_SUITE_WEP104))
2146                 return -EOPNOTSUPP;
2147
2148         key->hw_key_idx = key->keyidx;
2149
2150         mutex_lock(&priv->mtx);
2151
2152         switch (cmd) {
2153         case SET_KEY:
2154                 memcpy(priv->wep_keys[key->keyidx], key->key, key->keylen);
2155                 priv->wep_keys_len[key->keyidx] = key->keylen;
2156
2157                 /* FIXME: find out how to do this properly */
2158                 priv->wep_key_id = key->keyidx;
2159
2160                 break;
2161         case DISABLE_KEY:
2162         default:
2163                 priv->wep_keys_len[key->keyidx] = 0;
2164                 break;
2165         }
2166
2167         priv->wep_enabled = 0;
2168
2169         for (i = 0; i < WEP_KEYS; i++) {
2170                 if (priv->wep_keys_len[i] != 0)
2171                         priv->wep_enabled = 1;
2172         }
2173
2174         at76_set_wep(priv);
2175
2176         mutex_unlock(&priv->mtx);
2177
2178         return 0;
2179 }
2180
2181 static const struct ieee80211_ops at76_ops = {
2182         .tx = at76_mac80211_tx,
2183         .add_interface = at76_add_interface,
2184         .remove_interface = at76_remove_interface,
2185         .config = at76_config,
2186         .bss_info_changed = at76_bss_info_changed,
2187         .configure_filter = at76_configure_filter,
2188         .start = at76_mac80211_start,
2189         .stop = at76_mac80211_stop,
2190         .hw_scan = at76_hw_scan,
2191         .set_key = at76_set_key,
2192 };
2193
2194 /* Allocate network device and initialize private data */
2195 static struct at76_priv *at76_alloc_new_device(struct usb_device *udev)
2196 {
2197         struct ieee80211_hw *hw;
2198         struct at76_priv *priv;
2199
2200         hw = ieee80211_alloc_hw(sizeof(struct at76_priv), &at76_ops);
2201         if (!hw) {
2202                 printk(KERN_ERR DRIVER_NAME ": could not register"
2203                        " ieee80211_hw\n");
2204                 return NULL;
2205         }
2206
2207         priv = hw->priv;
2208         priv->hw = hw;
2209
2210         priv->udev = udev;
2211
2212         mutex_init(&priv->mtx);
2213         INIT_WORK(&priv->work_set_promisc, at76_work_set_promisc);
2214         INIT_WORK(&priv->work_submit_rx, at76_work_submit_rx);
2215         INIT_WORK(&priv->work_join_bssid, at76_work_join_bssid);
2216         INIT_DELAYED_WORK(&priv->dwork_hw_scan, at76_dwork_hw_scan);
2217
2218         tasklet_init(&priv->rx_tasklet, at76_rx_tasklet, 0);
2219
2220         priv->pm_mode = AT76_PM_OFF;
2221         priv->pm_period = 0;
2222
2223         /* unit us */
2224
2225         return priv;
2226 }
2227
2228 static int at76_alloc_urbs(struct at76_priv *priv,
2229                            struct usb_interface *interface)
2230 {
2231         struct usb_endpoint_descriptor *endpoint, *ep_in, *ep_out;
2232         int i;
2233         int buffer_size;
2234         struct usb_host_interface *iface_desc;
2235
2236         at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
2237
2238         at76_dbg(DBG_URB, "%s: NumEndpoints %d ", __func__,
2239                  interface->cur_altsetting->desc.bNumEndpoints);
2240
2241         ep_in = NULL;
2242         ep_out = NULL;
2243         iface_desc = interface->cur_altsetting;
2244         for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
2245                 endpoint = &iface_desc->endpoint[i].desc;
2246
2247                 at76_dbg(DBG_URB, "%s: %d. endpoint: addr 0x%x attr 0x%x",
2248                          __func__, i, endpoint->bEndpointAddress,
2249                          endpoint->bmAttributes);
2250
2251                 if (!ep_in && usb_endpoint_is_bulk_in(endpoint))
2252                         ep_in = endpoint;
2253
2254                 if (!ep_out && usb_endpoint_is_bulk_out(endpoint))
2255                         ep_out = endpoint;
2256         }
2257
2258         if (!ep_in || !ep_out) {
2259                 dev_err(&interface->dev, "bulk endpoints missing\n");
2260                 return -ENXIO;
2261         }
2262
2263         priv->rx_pipe = usb_rcvbulkpipe(priv->udev, ep_in->bEndpointAddress);
2264         priv->tx_pipe = usb_sndbulkpipe(priv->udev, ep_out->bEndpointAddress);
2265
2266         priv->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2267         priv->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2268         if (!priv->rx_urb || !priv->tx_urb) {
2269                 dev_err(&interface->dev, "cannot allocate URB\n");
2270                 return -ENOMEM;
2271         }
2272
2273         buffer_size = sizeof(struct at76_tx_buffer) + MAX_PADDING_SIZE;
2274         priv->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
2275         if (!priv->bulk_out_buffer)
2276                 return -ENOMEM;
2277
2278         at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
2279
2280         return 0;
2281 }
2282
2283 static struct ieee80211_rate at76_rates[] = {
2284         { .bitrate = 10, .hw_value = TX_RATE_1MBIT, },
2285         { .bitrate = 20, .hw_value = TX_RATE_2MBIT, },
2286         { .bitrate = 55, .hw_value = TX_RATE_5_5MBIT, },
2287         { .bitrate = 110, .hw_value = TX_RATE_11MBIT, },
2288 };
2289
2290 static struct ieee80211_channel at76_channels[] = {
2291         { .center_freq = 2412, .hw_value = 1 },
2292         { .center_freq = 2417, .hw_value = 2 },
2293         { .center_freq = 2422, .hw_value = 3 },
2294         { .center_freq = 2427, .hw_value = 4 },
2295         { .center_freq = 2432, .hw_value = 5 },
2296         { .center_freq = 2437, .hw_value = 6 },
2297         { .center_freq = 2442, .hw_value = 7 },
2298         { .center_freq = 2447, .hw_value = 8 },
2299         { .center_freq = 2452, .hw_value = 9 },
2300         { .center_freq = 2457, .hw_value = 10 },
2301         { .center_freq = 2462, .hw_value = 11 },
2302         { .center_freq = 2467, .hw_value = 12 },
2303         { .center_freq = 2472, .hw_value = 13 },
2304         { .center_freq = 2484, .hw_value = 14 }
2305 };
2306
2307 static struct ieee80211_supported_band at76_supported_band = {
2308         .channels = at76_channels,
2309         .n_channels = ARRAY_SIZE(at76_channels),
2310         .bitrates = at76_rates,
2311         .n_bitrates = ARRAY_SIZE(at76_rates),
2312 };
2313
2314 /* Register network device and initialize the hardware */
2315 static int at76_init_new_device(struct at76_priv *priv,
2316                                 struct usb_interface *interface)
2317 {
2318         struct wiphy *wiphy;
2319         size_t len;
2320         int ret;
2321
2322         /* set up the endpoint information */
2323         /* check out the endpoints */
2324
2325         at76_dbg(DBG_DEVSTART, "USB interface: %d endpoints",
2326                  interface->cur_altsetting->desc.bNumEndpoints);
2327
2328         ret = at76_alloc_urbs(priv, interface);
2329         if (ret < 0)
2330                 goto exit;
2331
2332         /* MAC address */
2333         ret = at76_get_hw_config(priv);
2334         if (ret < 0) {
2335                 dev_err(&interface->dev, "cannot get MAC address\n");
2336                 goto exit;
2337         }
2338
2339         priv->domain = at76_get_reg_domain(priv->regulatory_domain);
2340
2341         priv->channel = DEF_CHANNEL;
2342         priv->iw_mode = IW_MODE_INFRA;
2343         priv->rts_threshold = DEF_RTS_THRESHOLD;
2344         priv->frag_threshold = DEF_FRAG_THRESHOLD;
2345         priv->short_retry_limit = DEF_SHORT_RETRY_LIMIT;
2346         priv->txrate = TX_RATE_AUTO;
2347         priv->preamble_type = PREAMBLE_TYPE_LONG;
2348         priv->beacon_period = 100;
2349         priv->auth_mode = WLAN_AUTH_OPEN;
2350         priv->scan_min_time = DEF_SCAN_MIN_TIME;
2351         priv->scan_max_time = DEF_SCAN_MAX_TIME;
2352         priv->scan_mode = SCAN_TYPE_ACTIVE;
2353         priv->device_unplugged = 0;
2354
2355         /* mac80211 initialisation */
2356         wiphy = priv->hw->wiphy;
2357         priv->hw->wiphy->max_scan_ssids = 1;
2358         priv->hw->wiphy->max_scan_ie_len = 0;
2359         priv->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
2360         priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = &at76_supported_band;
2361         ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
2362         ieee80211_hw_set(priv->hw, SIGNAL_UNSPEC);
2363         priv->hw->max_signal = 100;
2364
2365         SET_IEEE80211_DEV(priv->hw, &interface->dev);
2366         SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2367
2368         len = sizeof(wiphy->fw_version);
2369         snprintf(wiphy->fw_version, len, "%d.%d.%d-%d",
2370                  priv->fw_version.major, priv->fw_version.minor,
2371                  priv->fw_version.patch, priv->fw_version.build);
2372
2373         wiphy->hw_version = priv->board_type;
2374
2375         wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2376
2377         ret = ieee80211_register_hw(priv->hw);
2378         if (ret) {
2379                 printk(KERN_ERR "cannot register mac80211 hw (status %d)!\n",
2380                        ret);
2381                 goto exit;
2382         }
2383
2384         priv->mac80211_registered = 1;
2385
2386         wiphy_info(priv->hw->wiphy, "USB %s, MAC %pM, firmware %d.%d.%d-%d\n",
2387                    dev_name(&interface->dev), priv->mac_addr,
2388                    priv->fw_version.major, priv->fw_version.minor,
2389                    priv->fw_version.patch, priv->fw_version.build);
2390         wiphy_info(priv->hw->wiphy, "regulatory domain 0x%02x: %s\n",
2391                    priv->regulatory_domain, priv->domain->name);
2392
2393 exit:
2394         return ret;
2395 }
2396
2397 static void at76_delete_device(struct at76_priv *priv)
2398 {
2399         at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
2400
2401         /* The device is gone, don't bother turning it off */
2402         priv->device_unplugged = 1;
2403
2404         tasklet_kill(&priv->rx_tasklet);
2405
2406         if (priv->mac80211_registered)
2407                 ieee80211_unregister_hw(priv->hw);
2408
2409         if (priv->tx_urb) {
2410                 usb_kill_urb(priv->tx_urb);
2411                 usb_free_urb(priv->tx_urb);
2412         }
2413         if (priv->rx_urb) {
2414                 usb_kill_urb(priv->rx_urb);
2415                 usb_free_urb(priv->rx_urb);
2416         }
2417
2418         at76_dbg(DBG_PROC_ENTRY, "%s: unlinked urbs", __func__);
2419
2420         kfree(priv->bulk_out_buffer);
2421
2422         del_timer_sync(&ledtrig_tx_timer);
2423
2424         kfree_skb(priv->rx_skb);
2425
2426         at76_dbg(DBG_PROC_ENTRY, "%s: before freeing priv/ieee80211_hw",
2427                  __func__);
2428         ieee80211_free_hw(priv->hw);
2429
2430         at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
2431 }
2432
2433 static int at76_probe(struct usb_interface *interface,
2434                       const struct usb_device_id *id)
2435 {
2436         int ret;
2437         struct at76_priv *priv;
2438         struct fwentry *fwe;
2439         struct usb_device *udev;
2440         int op_mode;
2441         int need_ext_fw = 0;
2442         struct mib_fw_version *fwv = NULL;
2443         int board_type = (int)id->driver_info;
2444
2445         udev = usb_get_dev(interface_to_usbdev(interface));
2446
2447         fwv = kmalloc(sizeof(*fwv), GFP_KERNEL);
2448         if (!fwv) {
2449                 ret = -ENOMEM;
2450                 goto exit;
2451         }
2452
2453         /* Load firmware into kernel memory */
2454         fwe = at76_load_firmware(udev, board_type);
2455         if (!fwe) {
2456                 ret = -ENOENT;
2457                 goto exit;
2458         }
2459
2460         op_mode = at76_get_op_mode(udev);
2461
2462         at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
2463
2464         /* we get OPMODE_NONE with 2.4.23, SMC2662W-AR ???
2465            we get 204 with 2.4.23, Fiberline FL-WL240u (505A+RFMD2958) ??? */
2466
2467         if (op_mode == OPMODE_HW_CONFIG_MODE) {
2468                 dev_err(&interface->dev,
2469                         "cannot handle a device in HW_CONFIG_MODE\n");
2470                 ret = -EBUSY;
2471                 goto exit;
2472         }
2473
2474         if (op_mode != OPMODE_NORMAL_NIC_WITH_FLASH
2475             && op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
2476                 /* download internal firmware part */
2477                 dev_printk(KERN_DEBUG, &interface->dev,
2478                            "downloading internal firmware\n");
2479                 ret = at76_load_internal_fw(udev, fwe);
2480                 if (ret < 0) {
2481                         dev_err(&interface->dev,
2482                                 "error %d downloading internal firmware\n",
2483                                 ret);
2484                 }
2485                 goto exit;
2486         }
2487
2488         /* Internal firmware already inside the device.  Get firmware
2489          * version to test if external firmware is loaded.
2490          * This works only for newer firmware, e.g. the Intersil 0.90.x
2491          * says "control timeout on ep0in" and subsequent
2492          * at76_get_op_mode() fail too :-( */
2493
2494         /* if version >= 0.100.x.y or device with built-in flash we can
2495          * query the device for the fw version */
2496         if ((fwe->fw_version.major > 0 || fwe->fw_version.minor >= 100)
2497             || (op_mode == OPMODE_NORMAL_NIC_WITH_FLASH)) {
2498                 ret = at76_get_mib(udev, MIB_FW_VERSION, fwv, sizeof(*fwv));
2499                 if (ret < 0 || (fwv->major | fwv->minor) == 0)
2500                         need_ext_fw = 1;
2501         } else
2502                 /* No way to check firmware version, reload to be sure */
2503                 need_ext_fw = 1;
2504
2505         if (need_ext_fw) {
2506                 dev_printk(KERN_DEBUG, &interface->dev,
2507                            "downloading external firmware\n");
2508
2509                 ret = at76_load_external_fw(udev, fwe);
2510                 if (ret < 0)
2511                         goto exit;
2512
2513                 /* Re-check firmware version */
2514                 ret = at76_get_mib(udev, MIB_FW_VERSION, fwv, sizeof(*fwv));
2515                 if (ret < 0) {
2516                         dev_err(&interface->dev,
2517                                 "error %d getting firmware version\n", ret);
2518                         goto exit;
2519                 }
2520         }
2521
2522         priv = at76_alloc_new_device(udev);
2523         if (!priv) {
2524                 ret = -ENOMEM;
2525                 goto exit;
2526         }
2527
2528         usb_set_intfdata(interface, priv);
2529
2530         memcpy(&priv->fw_version, fwv, sizeof(struct mib_fw_version));
2531         priv->board_type = board_type;
2532
2533         ret = at76_init_new_device(priv, interface);
2534         if (ret < 0)
2535                 at76_delete_device(priv);
2536
2537 exit:
2538         kfree(fwv);
2539         if (ret < 0)
2540                 usb_put_dev(udev);
2541         return ret;
2542 }
2543
2544 static void at76_disconnect(struct usb_interface *interface)
2545 {
2546         struct at76_priv *priv;
2547
2548         priv = usb_get_intfdata(interface);
2549         usb_set_intfdata(interface, NULL);
2550
2551         /* Disconnect after loading internal firmware */
2552         if (!priv)
2553                 return;
2554
2555         wiphy_info(priv->hw->wiphy, "disconnecting\n");
2556         at76_delete_device(priv);
2557         usb_put_dev(priv->udev);
2558         dev_info(&interface->dev, "disconnected\n");
2559 }
2560
2561 /* Structure for registering this driver with the USB subsystem */
2562 static struct usb_driver at76_driver = {
2563         .name = DRIVER_NAME,
2564         .probe = at76_probe,
2565         .disconnect = at76_disconnect,
2566         .id_table = dev_table,
2567         .disable_hub_initiated_lpm = 1,
2568 };
2569
2570 static int __init at76_mod_init(void)
2571 {
2572         int result;
2573
2574         printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " loading\n");
2575
2576         mutex_init(&fw_mutex);
2577
2578         /* register this driver with the USB subsystem */
2579         result = usb_register(&at76_driver);
2580         if (result < 0)
2581                 printk(KERN_ERR DRIVER_NAME
2582                        ": usb_register failed (status %d)\n", result);
2583         else
2584                 led_trigger_register_simple("at76_usb-tx", &ledtrig_tx);
2585         return result;
2586 }
2587
2588 static void __exit at76_mod_exit(void)
2589 {
2590         int i;
2591
2592         printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " unloading\n");
2593         usb_deregister(&at76_driver);
2594         for (i = 0; i < ARRAY_SIZE(firmwares); i++)
2595                 release_firmware(firmwares[i].fw);
2596         led_trigger_unregister_simple(ledtrig_tx);
2597 }
2598
2599 module_param_named(debug, at76_debug, uint, 0600);
2600 MODULE_PARM_DESC(debug, "Debugging level");
2601
2602 module_init(at76_mod_init);
2603 module_exit(at76_mod_exit);
2604
2605 MODULE_AUTHOR("Oliver Kurth <[email protected]>");
2606 MODULE_AUTHOR("Joerg Albert <[email protected]>");
2607 MODULE_AUTHOR("Alex <[email protected]>");
2608 MODULE_AUTHOR("Nick Jones");
2609 MODULE_AUTHOR("Balint Seeber <[email protected]>");
2610 MODULE_AUTHOR("Pavel Roskin <[email protected]>");
2611 MODULE_AUTHOR("Guido Guenther <[email protected]>");
2612 MODULE_AUTHOR("Kalle Valo <[email protected]>");
2613 MODULE_AUTHOR("Sebastian Smolorz <[email protected]>");
2614 MODULE_DESCRIPTION(DRIVER_DESC);
2615 MODULE_LICENSE("GPL");