1 /*
2  * at76c503/at76c505 USB driver
3  *
4  * Copyright (c) 2002 - 2003 Oliver Kurth
5  * Copyright (c) 2004 Joerg Albert <joerg.albert@gmx.de>
6  * Copyright (c) 2004 Nick Jones
7  * Copyright (c) 2004 Balint Seeber <n0_5p4m_p13453@hotmail.com>
8  * Copyright (c) 2007 Guido Guenther <agx@sigxcpu.org>
9  * Copyright (c) 2007 Kalle Valo <kalle.valo@iki.fi>
10  * Copyright (c) 2010 Sebastian Smolorz <sesmo@gmx.net>
11  *
12  * This program is free software; you can redistribute it and/or
13  * modify it under the terms of the GNU General Public License as
14  * published by the Free Software Foundation; either version 2 of
15  * the License, or (at your option) any later version.
16  *
17  * This file is part of the Berlios driver for WLAN USB devices based on the
18  * Atmel AT76C503A/505/505A.
19  *
20  * Some iw_handler code was taken from airo.c, (C) 1999 Benjamin Reed
21  *
22  * TODO list is at the wiki:
23  *
24  * http://wireless.kernel.org/en/users/Drivers/at76c50x-usb#TODO
25  *
26  */
27 
28 #include <linux/init.h>
29 #include <linux/kernel.h>
30 #include <linux/sched.h>
31 #include <linux/errno.h>
32 #include <linux/slab.h>
33 #include <linux/module.h>
34 #include <linux/spinlock.h>
35 #include <linux/list.h>
36 #include <linux/usb.h>
37 #include <linux/netdevice.h>
38 #include <linux/if_arp.h>
39 #include <linux/etherdevice.h>
40 #include <linux/ethtool.h>
41 #include <linux/wireless.h>
42 #include <net/iw_handler.h>
43 #include <net/ieee80211_radiotap.h>
44 #include <linux/firmware.h>
45 #include <linux/leds.h>
46 #include <net/mac80211.h>
47 
48 #include "at76c50x-usb.h"
49 
50 /* Version information */
51 #define DRIVER_NAME "at76c50x-usb"
52 #define DRIVER_VERSION	"0.17"
53 #define DRIVER_DESC "Atmel at76x USB Wireless LAN Driver"
54 
55 /* at76_debug bits */
56 #define DBG_PROGRESS		0x00000001	/* authentication/accociation */
57 #define DBG_BSS_TABLE		0x00000002	/* show BSS table after scans */
58 #define DBG_IOCTL		0x00000004	/* ioctl calls / settings */
59 #define DBG_MAC_STATE		0x00000008	/* MAC state transitions */
60 #define DBG_TX_DATA		0x00000010	/* tx header */
61 #define DBG_TX_DATA_CONTENT	0x00000020	/* tx content */
62 #define DBG_TX_MGMT		0x00000040	/* tx management */
63 #define DBG_RX_DATA		0x00000080	/* rx data header */
64 #define DBG_RX_DATA_CONTENT	0x00000100	/* rx data content */
65 #define DBG_RX_MGMT		0x00000200	/* rx mgmt frame headers */
66 #define DBG_RX_BEACON		0x00000400	/* rx beacon */
67 #define DBG_RX_CTRL		0x00000800	/* rx control */
68 #define DBG_RX_MGMT_CONTENT	0x00001000	/* rx mgmt content */
69 #define DBG_RX_FRAGS		0x00002000	/* rx data fragment handling */
70 #define DBG_DEVSTART		0x00004000	/* fw download, device start */
71 #define DBG_URB			0x00008000	/* rx urb status, ... */
72 #define DBG_RX_ATMEL_HDR	0x00010000	/* Atmel-specific Rx headers */
73 #define DBG_PROC_ENTRY		0x00020000	/* procedure entries/exits */
74 #define DBG_PM			0x00040000	/* power management settings */
75 #define DBG_BSS_MATCH		0x00080000	/* BSS match failures */
76 #define DBG_PARAMS		0x00100000	/* show configured parameters */
77 #define DBG_WAIT_COMPLETE	0x00200000	/* command completion */
78 #define DBG_RX_FRAGS_SKB	0x00400000	/* skb header of Rx fragments */
79 #define DBG_BSS_TABLE_RM	0x00800000	/* purging bss table entries */
80 #define DBG_MONITOR_MODE	0x01000000	/* monitor mode */
81 #define DBG_MIB			0x02000000	/* dump all MIBs on startup */
82 #define DBG_MGMT_TIMER		0x04000000	/* dump mgmt_timer ops */
83 #define DBG_WE_EVENTS		0x08000000	/* dump wireless events */
84 #define DBG_FW			0x10000000	/* firmware download */
85 #define DBG_DFU			0x20000000	/* device firmware upgrade */
86 #define DBG_CMD			0x40000000
87 #define DBG_MAC80211		0x80000000
88 
89 #define DBG_DEFAULTS		0
90 
91 /* Use our own dbg macro */
92 #define at76_dbg(bits, format, arg...)					\
93 do {									\
94 	if (at76_debug & (bits))					\
95 		printk(KERN_DEBUG DRIVER_NAME ": " format "\n", ##arg);	\
96 } while (0)
97 
98 #define at76_dbg_dump(bits, buf, len, format, arg...)			\
99 do {									\
100 	if (at76_debug & (bits)) {					\
101 		printk(KERN_DEBUG DRIVER_NAME ": " format "\n", ##arg);	\
102 		print_hex_dump_bytes("", DUMP_PREFIX_OFFSET, buf, len);	\
103 	}								\
104 } while (0)
105 
106 static uint at76_debug = DBG_DEFAULTS;
107 
108 /* Protect against concurrent firmware loading and parsing */
109 static struct mutex fw_mutex;
110 
111 static struct fwentry firmwares[] = {
112 	[0] = { "" },
113 	[BOARD_503_ISL3861] = { "atmel_at76c503-i3861.bin" },
114 	[BOARD_503_ISL3863] = { "atmel_at76c503-i3863.bin" },
115 	[BOARD_503] = { "atmel_at76c503-rfmd.bin" },
116 	[BOARD_503_ACC] = { "atmel_at76c503-rfmd-acc.bin" },
117 	[BOARD_505] = { "atmel_at76c505-rfmd.bin" },
118 	[BOARD_505_2958] = { "atmel_at76c505-rfmd2958.bin" },
119 	[BOARD_505A] = { "atmel_at76c505a-rfmd2958.bin" },
120 	[BOARD_505AMX] = { "atmel_at76c505amx-rfmd.bin" },
121 };
122 MODULE_FIRMWARE("atmel_at76c503-i3861.bin");
123 MODULE_FIRMWARE("atmel_at76c503-i3863.bin");
124 MODULE_FIRMWARE("atmel_at76c503-rfmd.bin");
125 MODULE_FIRMWARE("atmel_at76c503-rfmd-acc.bin");
126 MODULE_FIRMWARE("atmel_at76c505-rfmd.bin");
127 MODULE_FIRMWARE("atmel_at76c505-rfmd2958.bin");
128 MODULE_FIRMWARE("atmel_at76c505a-rfmd2958.bin");
129 MODULE_FIRMWARE("atmel_at76c505amx-rfmd.bin");
130 
131 #define USB_DEVICE_DATA(__ops)	.driver_info = (kernel_ulong_t)(__ops)
132 
133 static const struct usb_device_id dev_table[] = {
134 	/*
135 	 * at76c503-i3861
136 	 */
137 	/* Generic AT76C503/3861 device */
138 	{ USB_DEVICE(0x03eb, 0x7603), USB_DEVICE_DATA(BOARD_503_ISL3861) },
139 	/* Linksys WUSB11 v2.1/v2.6 */
140 	{ USB_DEVICE(0x066b, 0x2211), USB_DEVICE_DATA(BOARD_503_ISL3861) },
141 	/* Netgear MA101 rev. A */
142 	{ USB_DEVICE(0x0864, 0x4100), USB_DEVICE_DATA(BOARD_503_ISL3861) },
143 	/* Tekram U300C / Allnet ALL0193 */
144 	{ USB_DEVICE(0x0b3b, 0x1612), USB_DEVICE_DATA(BOARD_503_ISL3861) },
145 	/* HP HN210W J7801A */
146 	{ USB_DEVICE(0x03f0, 0x011c), USB_DEVICE_DATA(BOARD_503_ISL3861) },
147 	/* Sitecom/Z-Com/Zyxel M4Y-750 */
148 	{ USB_DEVICE(0x0cde, 0x0001), USB_DEVICE_DATA(BOARD_503_ISL3861) },
149 	/* Dynalink/Askey WLL013 (intersil) */
150 	{ USB_DEVICE(0x069a, 0x0320), USB_DEVICE_DATA(BOARD_503_ISL3861) },
151 	/* EZ connect 11Mpbs Wireless USB Adapter SMC2662W v1 */
152 	{ USB_DEVICE(0x0d5c, 0xa001), USB_DEVICE_DATA(BOARD_503_ISL3861) },
153 	/* BenQ AWL300 */
154 	{ USB_DEVICE(0x04a5, 0x9000), USB_DEVICE_DATA(BOARD_503_ISL3861) },
155 	/* Addtron AWU-120, Compex WLU11 */
156 	{ USB_DEVICE(0x05dd, 0xff31), USB_DEVICE_DATA(BOARD_503_ISL3861) },
157 	/* Intel AP310 AnyPoint II USB */
158 	{ USB_DEVICE(0x8086, 0x0200), USB_DEVICE_DATA(BOARD_503_ISL3861) },
159 	/* Dynalink L11U */
160 	{ USB_DEVICE(0x0d8e, 0x7100), USB_DEVICE_DATA(BOARD_503_ISL3861) },
161 	/* Arescom WL-210, FCC id 07J-GL2411USB */
162 	{ USB_DEVICE(0x0d8e, 0x7110), USB_DEVICE_DATA(BOARD_503_ISL3861) },
163 	/* I-O DATA WN-B11/USB */
164 	{ USB_DEVICE(0x04bb, 0x0919), USB_DEVICE_DATA(BOARD_503_ISL3861) },
165 	/* BT Voyager 1010 */
166 	{ USB_DEVICE(0x069a, 0x0821), USB_DEVICE_DATA(BOARD_503_ISL3861) },
167 	/*
168 	 * at76c503-i3863
169 	 */
170 	/* Generic AT76C503/3863 device */
171 	{ USB_DEVICE(0x03eb, 0x7604), USB_DEVICE_DATA(BOARD_503_ISL3863) },
172 	/* Samsung SWL-2100U */
173 	{ USB_DEVICE(0x055d, 0xa000), USB_DEVICE_DATA(BOARD_503_ISL3863) },
174 	/*
175 	 * at76c503-rfmd
176 	 */
177 	/* Generic AT76C503/RFMD device */
178 	{ USB_DEVICE(0x03eb, 0x7605), USB_DEVICE_DATA(BOARD_503) },
179 	/* Dynalink/Askey WLL013 (rfmd) */
180 	{ USB_DEVICE(0x069a, 0x0321), USB_DEVICE_DATA(BOARD_503) },
181 	/* Linksys WUSB11 v2.6 */
182 	{ USB_DEVICE(0x077b, 0x2219), USB_DEVICE_DATA(BOARD_503) },
183 	/* Network Everywhere NWU11B */
184 	{ USB_DEVICE(0x077b, 0x2227), USB_DEVICE_DATA(BOARD_503) },
185 	/* Netgear MA101 rev. B */
186 	{ USB_DEVICE(0x0864, 0x4102), USB_DEVICE_DATA(BOARD_503) },
187 	/* D-Link DWL-120 rev. E */
188 	{ USB_DEVICE(0x2001, 0x3200), USB_DEVICE_DATA(BOARD_503) },
189 	/* Actiontec 802UAT1, HWU01150-01UK */
190 	{ USB_DEVICE(0x1668, 0x7605), USB_DEVICE_DATA(BOARD_503) },
191 	/* AirVast W-Buddie WN210 */
192 	{ USB_DEVICE(0x03eb, 0x4102), USB_DEVICE_DATA(BOARD_503) },
193 	/* Dick Smith Electronics XH1153 802.11b USB adapter */
194 	{ USB_DEVICE(0x1371, 0x5743), USB_DEVICE_DATA(BOARD_503) },
195 	/* CNet CNUSB611 */
196 	{ USB_DEVICE(0x1371, 0x0001), USB_DEVICE_DATA(BOARD_503) },
197 	/* FiberLine FL-WL200U */
198 	{ USB_DEVICE(0x1371, 0x0002), USB_DEVICE_DATA(BOARD_503) },
199 	/* BenQ AWL400 USB stick */
200 	{ USB_DEVICE(0x04a5, 0x9001), USB_DEVICE_DATA(BOARD_503) },
201 	/* 3Com 3CRSHEW696 */
202 	{ USB_DEVICE(0x0506, 0x0a01), USB_DEVICE_DATA(BOARD_503) },
203 	/* Siemens Santis ADSL WLAN USB adapter WLL 013 */
204 	{ USB_DEVICE(0x0681, 0x001b), USB_DEVICE_DATA(BOARD_503) },
205 	/* Belkin F5D6050, version 2 */
206 	{ USB_DEVICE(0x050d, 0x0050), USB_DEVICE_DATA(BOARD_503) },
207 	/* iBlitzz, BWU613 (not *B or *SB) */
208 	{ USB_DEVICE(0x07b8, 0xb000), USB_DEVICE_DATA(BOARD_503) },
209 	/* Gigabyte GN-WLBM101 */
210 	{ USB_DEVICE(0x1044, 0x8003), USB_DEVICE_DATA(BOARD_503) },
211 	/* Planex GW-US11S */
212 	{ USB_DEVICE(0x2019, 0x3220), USB_DEVICE_DATA(BOARD_503) },
213 	/* Internal WLAN adapter in h5[4,5]xx series iPAQs */
214 	{ USB_DEVICE(0x049f, 0x0032), USB_DEVICE_DATA(BOARD_503) },
215 	/* Corega Wireless LAN USB-11 mini */
216 	{ USB_DEVICE(0x07aa, 0x0011), USB_DEVICE_DATA(BOARD_503) },
217 	/* Corega Wireless LAN USB-11 mini2 */
218 	{ USB_DEVICE(0x07aa, 0x0018), USB_DEVICE_DATA(BOARD_503) },
219 	/* Uniden PCW100 */
220 	{ USB_DEVICE(0x05dd, 0xff35), USB_DEVICE_DATA(BOARD_503) },
221 	/*
222 	 * at76c503-rfmd-acc
223 	 */
224 	/* SMC2664W */
225 	{ USB_DEVICE(0x083a, 0x3501), USB_DEVICE_DATA(BOARD_503_ACC) },
226 	/* Belkin F5D6050, SMC2662W v2, SMC2662W-AR */
227 	{ USB_DEVICE(0x0d5c, 0xa002), USB_DEVICE_DATA(BOARD_503_ACC) },
228 	/*
229 	 * at76c505-rfmd
230 	 */
231 	/* Generic AT76C505/RFMD */
232 	{ USB_DEVICE(0x03eb, 0x7606), USB_DEVICE_DATA(BOARD_505) },
233 	/*
234 	 * at76c505-rfmd2958
235 	 */
236 	/* Generic AT76C505/RFMD, OvisLink WL-1130USB */
237 	{ USB_DEVICE(0x03eb, 0x7613), USB_DEVICE_DATA(BOARD_505_2958) },
238 	/* Fiberline FL-WL240U */
239 	{ USB_DEVICE(0x1371, 0x0014), USB_DEVICE_DATA(BOARD_505_2958) },
240 	/* CNet CNUSB-611G */
241 	{ USB_DEVICE(0x1371, 0x0013), USB_DEVICE_DATA(BOARD_505_2958) },
242 	/* Linksys WUSB11 v2.8 */
243 	{ USB_DEVICE(0x1915, 0x2233), USB_DEVICE_DATA(BOARD_505_2958) },
244 	/* Xterasys XN-2122B, IBlitzz BWU613B/BWU613SB */
245 	{ USB_DEVICE(0x12fd, 0x1001), USB_DEVICE_DATA(BOARD_505_2958) },
246 	/* Corega WLAN USB Stick 11 */
247 	{ USB_DEVICE(0x07aa, 0x7613), USB_DEVICE_DATA(BOARD_505_2958) },
248 	/* Microstar MSI Box MS6978 */
249 	{ USB_DEVICE(0x0db0, 0x1020), USB_DEVICE_DATA(BOARD_505_2958) },
250 	/*
251 	 * at76c505a-rfmd2958
252 	 */
253 	/* Generic AT76C505A device */
254 	{ USB_DEVICE(0x03eb, 0x7614), USB_DEVICE_DATA(BOARD_505A) },
255 	/* Generic AT76C505AS device */
256 	{ USB_DEVICE(0x03eb, 0x7617), USB_DEVICE_DATA(BOARD_505A) },
257 	/* Siemens Gigaset USB WLAN Adapter 11 */
258 	{ USB_DEVICE(0x1690, 0x0701), USB_DEVICE_DATA(BOARD_505A) },
259 	/* OQO Model 01+ Internal Wi-Fi */
260 	{ USB_DEVICE(0x1557, 0x0002), USB_DEVICE_DATA(BOARD_505A) },
261 	/*
262 	 * at76c505amx-rfmd
263 	 */
264 	/* Generic AT76C505AMX device */
265 	{ USB_DEVICE(0x03eb, 0x7615), USB_DEVICE_DATA(BOARD_505AMX) },
266 	{ }
267 };
268 
269 MODULE_DEVICE_TABLE(usb, dev_table);
270 
271 /* Supported rates of this hardware, bit 7 marks basic rates */
272 static const u8 hw_rates[] = { 0x82, 0x84, 0x0b, 0x16 };
273 
274 static const char *const preambles[] = { "long", "short", "auto" };
275 
276 /* Firmware download */
277 /* DFU states */
278 #define STATE_IDLE			0x00
279 #define STATE_DETACH			0x01
280 #define STATE_DFU_IDLE			0x02
281 #define STATE_DFU_DOWNLOAD_SYNC		0x03
282 #define STATE_DFU_DOWNLOAD_BUSY		0x04
283 #define STATE_DFU_DOWNLOAD_IDLE		0x05
284 #define STATE_DFU_MANIFEST_SYNC		0x06
285 #define STATE_DFU_MANIFEST		0x07
286 #define STATE_DFU_MANIFEST_WAIT_RESET	0x08
287 #define STATE_DFU_UPLOAD_IDLE		0x09
288 #define STATE_DFU_ERROR			0x0a
289 
290 /* DFU commands */
291 #define DFU_DETACH			0
292 #define DFU_DNLOAD			1
293 #define DFU_UPLOAD			2
294 #define DFU_GETSTATUS			3
295 #define DFU_CLRSTATUS			4
296 #define DFU_GETSTATE			5
297 #define DFU_ABORT			6
298 
299 #define FW_BLOCK_SIZE 1024
300 
301 struct dfu_status {
302 	unsigned char status;
303 	unsigned char poll_timeout[3];
304 	unsigned char state;
305 	unsigned char string;
306 } __packed;
307 
308 static inline int at76_is_intersil(enum board_type board)
309 {
310 	return (board == BOARD_503_ISL3861 || board == BOARD_503_ISL3863);
311 }
312 
313 static inline int at76_is_503rfmd(enum board_type board)
314 {
315 	return (board == BOARD_503 || board == BOARD_503_ACC);
316 }
317 
318 static inline int at76_is_505a(enum board_type board)
319 {
320 	return (board == BOARD_505A || board == BOARD_505AMX);
321 }
322 
323 /* Load a block of the first (internal) part of the firmware */
324 static int at76_load_int_fw_block(struct usb_device *udev, int blockno,
325 				  void *block, int size)
326 {
327 	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), DFU_DNLOAD,
328 			       USB_TYPE_CLASS | USB_DIR_OUT |
329 			       USB_RECIP_INTERFACE, blockno, 0, block, size,
330 			       USB_CTRL_GET_TIMEOUT);
331 }
332 
333 static int at76_dfu_get_status(struct usb_device *udev,
334 			       struct dfu_status *status)
335 {
336 	int ret;
337 
338 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), DFU_GETSTATUS,
339 			      USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
340 			      0, 0, status, sizeof(struct dfu_status),
341 			      USB_CTRL_GET_TIMEOUT);
342 	return ret;
343 }
344 
345 static int at76_dfu_get_state(struct usb_device *udev, u8 *state)
346 {
347 	int ret;
348 
349 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), DFU_GETSTATE,
350 			      USB_TYPE_CLASS | USB_DIR_IN | USB_RECIP_INTERFACE,
351 			      0, 0, state, 1, USB_CTRL_GET_TIMEOUT);
352 	return ret;
353 }
354 
355 /* Convert timeout from the DFU status to jiffies */
356 static inline unsigned long at76_get_timeout(struct dfu_status *s)
357 {
358 	return msecs_to_jiffies((s->poll_timeout[2] << 16)
359 				| (s->poll_timeout[1] << 8)
360 				| (s->poll_timeout[0]));
361 }
362 
363 /* Load internal firmware from the buffer.  If manifest_sync_timeout > 0, use
364  * its value in jiffies in the MANIFEST_SYNC state.  */
365 static int at76_usbdfu_download(struct usb_device *udev, u8 *buf, u32 size,
366 				int manifest_sync_timeout)
367 {
368 	int ret = 0;
369 	int need_dfu_state = 1;
370 	int is_done = 0;
371 	u32 dfu_timeout = 0;
372 	int bsize = 0;
373 	int blockno = 0;
374 	struct dfu_status *dfu_stat_buf = NULL;
375 	u8 *dfu_state = NULL;
376 	u8 *block = NULL;
377 
378 	at76_dbg(DBG_DFU, "%s( %p, %u, %d)", __func__, buf, size,
379 		 manifest_sync_timeout);
380 
381 	if (!size) {
382 		dev_err(&udev->dev, "FW buffer length invalid!\n");
383 		return -EINVAL;
384 	}
385 
386 	dfu_stat_buf = kmalloc(sizeof(struct dfu_status), GFP_KERNEL);
387 	if (!dfu_stat_buf) {
388 		ret = -ENOMEM;
389 		goto exit;
390 	}
391 
392 	block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
393 	if (!block) {
394 		ret = -ENOMEM;
395 		goto exit;
396 	}
397 
398 	dfu_state = kmalloc(sizeof(u8), GFP_KERNEL);
399 	if (!dfu_state) {
400 		ret = -ENOMEM;
401 		goto exit;
402 	}
403 	*dfu_state = 0;
404 
405 	do {
406 		if (need_dfu_state) {
407 			ret = at76_dfu_get_state(udev, dfu_state);
408 			if (ret < 0) {
409 				dev_err(&udev->dev,
410 					"cannot get DFU state: %d\n", ret);
411 				goto exit;
412 			}
413 			need_dfu_state = 0;
414 		}
415 
416 		switch (*dfu_state) {
417 		case STATE_DFU_DOWNLOAD_SYNC:
418 			at76_dbg(DBG_DFU, "STATE_DFU_DOWNLOAD_SYNC");
419 			ret = at76_dfu_get_status(udev, dfu_stat_buf);
420 			if (ret >= 0) {
421 				*dfu_state = dfu_stat_buf->state;
422 				dfu_timeout = at76_get_timeout(dfu_stat_buf);
423 				need_dfu_state = 0;
424 			} else
425 				dev_err(&udev->dev,
426 					"at76_dfu_get_status returned %d\n",
427 					ret);
428 			break;
429 
430 		case STATE_DFU_DOWNLOAD_BUSY:
431 			at76_dbg(DBG_DFU, "STATE_DFU_DOWNLOAD_BUSY");
432 			need_dfu_state = 1;
433 
434 			at76_dbg(DBG_DFU, "DFU: Resetting device");
435 			schedule_timeout_interruptible(dfu_timeout);
436 			break;
437 
438 		case STATE_DFU_DOWNLOAD_IDLE:
439 			at76_dbg(DBG_DFU, "DOWNLOAD...");
440 			/* fall through */
441 		case STATE_DFU_IDLE:
442 			at76_dbg(DBG_DFU, "DFU IDLE");
443 
444 			bsize = min_t(int, size, FW_BLOCK_SIZE);
445 			memcpy(block, buf, bsize);
446 			at76_dbg(DBG_DFU, "int fw, size left = %5d, "
447 				 "bsize = %4d, blockno = %2d", size, bsize,
448 				 blockno);
449 			ret =
450 			    at76_load_int_fw_block(udev, blockno, block, bsize);
451 			buf += bsize;
452 			size -= bsize;
453 			blockno++;
454 
455 			if (ret != bsize)
456 				dev_err(&udev->dev,
457 					"at76_load_int_fw_block returned %d\n",
458 					ret);
459 			need_dfu_state = 1;
460 			break;
461 
462 		case STATE_DFU_MANIFEST_SYNC:
463 			at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST_SYNC");
464 
465 			ret = at76_dfu_get_status(udev, dfu_stat_buf);
466 			if (ret < 0)
467 				break;
468 
469 			*dfu_state = dfu_stat_buf->state;
470 			dfu_timeout = at76_get_timeout(dfu_stat_buf);
471 			need_dfu_state = 0;
472 
473 			/* override the timeout from the status response,
474 			   needed for AT76C505A */
475 			if (manifest_sync_timeout > 0)
476 				dfu_timeout = manifest_sync_timeout;
477 
478 			at76_dbg(DBG_DFU, "DFU: Waiting for manifest phase");
479 			schedule_timeout_interruptible(dfu_timeout);
480 			break;
481 
482 		case STATE_DFU_MANIFEST:
483 			at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST");
484 			is_done = 1;
485 			break;
486 
487 		case STATE_DFU_MANIFEST_WAIT_RESET:
488 			at76_dbg(DBG_DFU, "STATE_DFU_MANIFEST_WAIT_RESET");
489 			is_done = 1;
490 			break;
491 
492 		case STATE_DFU_UPLOAD_IDLE:
493 			at76_dbg(DBG_DFU, "STATE_DFU_UPLOAD_IDLE");
494 			break;
495 
496 		case STATE_DFU_ERROR:
497 			at76_dbg(DBG_DFU, "STATE_DFU_ERROR");
498 			ret = -EPIPE;
499 			break;
500 
501 		default:
502 			at76_dbg(DBG_DFU, "DFU UNKNOWN STATE (%d)", *dfu_state);
503 			ret = -EINVAL;
504 			break;
505 		}
506 	} while (!is_done && (ret >= 0));
507 
508 exit:
509 	kfree(dfu_state);
510 	kfree(block);
511 	kfree(dfu_stat_buf);
512 
513 	if (ret >= 0)
514 		ret = 0;
515 
516 	return ret;
517 }
518 
519 /* LED trigger */
520 static int tx_activity;
521 static void at76_ledtrig_tx_timerfunc(struct timer_list *unused);
522 static DEFINE_TIMER(ledtrig_tx_timer, at76_ledtrig_tx_timerfunc);
523 DEFINE_LED_TRIGGER(ledtrig_tx);
524 
525 static void at76_ledtrig_tx_timerfunc(struct timer_list *unused)
526 {
527 	static int tx_lastactivity;
528 
529 	if (tx_lastactivity != tx_activity) {
530 		tx_lastactivity = tx_activity;
531 		led_trigger_event(ledtrig_tx, LED_FULL);
532 		mod_timer(&ledtrig_tx_timer, jiffies + HZ / 4);
533 	} else
534 		led_trigger_event(ledtrig_tx, LED_OFF);
535 }
536 
537 static void at76_ledtrig_tx_activity(void)
538 {
539 	tx_activity++;
540 	if (!timer_pending(&ledtrig_tx_timer))
541 		mod_timer(&ledtrig_tx_timer, jiffies + HZ / 4);
542 }
543 
544 static int at76_remap(struct usb_device *udev)
545 {
546 	int ret;
547 	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0a,
548 			      USB_TYPE_VENDOR | USB_DIR_OUT |
549 			      USB_RECIP_INTERFACE, 0, 0, NULL, 0,
550 			      USB_CTRL_GET_TIMEOUT);
551 	if (ret < 0)
552 		return ret;
553 	return 0;
554 }
555 
556 static int at76_get_op_mode(struct usb_device *udev)
557 {
558 	int ret;
559 	u8 saved;
560 	u8 *op_mode;
561 
562 	op_mode = kmalloc(1, GFP_NOIO);
563 	if (!op_mode)
564 		return -ENOMEM;
565 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
566 			      USB_TYPE_VENDOR | USB_DIR_IN |
567 			      USB_RECIP_INTERFACE, 0x01, 0, op_mode, 1,
568 			      USB_CTRL_GET_TIMEOUT);
569 	saved = *op_mode;
570 	kfree(op_mode);
571 
572 	if (ret < 0)
573 		return ret;
574 	else if (ret < 1)
575 		return -EIO;
576 	else
577 		return saved;
578 }
579 
580 /* Load a block of the second ("external") part of the firmware */
581 static inline int at76_load_ext_fw_block(struct usb_device *udev, int blockno,
582 					 void *block, int size)
583 {
584 	return usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0e,
585 			       USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
586 			       0x0802, blockno, block, size,
587 			       USB_CTRL_GET_TIMEOUT);
588 }
589 
590 static inline int at76_get_hw_cfg(struct usb_device *udev,
591 				  union at76_hwcfg *buf, int buf_size)
592 {
593 	return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
594 			       USB_TYPE_VENDOR | USB_DIR_IN |
595 			       USB_RECIP_INTERFACE, 0x0a02, 0,
596 			       buf, buf_size, USB_CTRL_GET_TIMEOUT);
597 }
598 
599 /* Intersil boards use a different "value" for GetHWConfig requests */
600 static inline int at76_get_hw_cfg_intersil(struct usb_device *udev,
601 					   union at76_hwcfg *buf, int buf_size)
602 {
603 	return usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
604 			       USB_TYPE_VENDOR | USB_DIR_IN |
605 			       USB_RECIP_INTERFACE, 0x0902, 0,
606 			       buf, buf_size, USB_CTRL_GET_TIMEOUT);
607 }
608 
609 /* Get the hardware configuration for the adapter and put it to the appropriate
610  * fields of 'priv' (the GetHWConfig request and interpretation of the result
611  * depends on the board type) */
612 static int at76_get_hw_config(struct at76_priv *priv)
613 {
614 	int ret;
615 	union at76_hwcfg *hwcfg = kmalloc(sizeof(*hwcfg), GFP_KERNEL);
616 
617 	if (!hwcfg)
618 		return -ENOMEM;
619 
620 	if (at76_is_intersil(priv->board_type)) {
621 		ret = at76_get_hw_cfg_intersil(priv->udev, hwcfg,
622 					       sizeof(hwcfg->i));
623 		if (ret < 0)
624 			goto exit;
625 		memcpy(priv->mac_addr, hwcfg->i.mac_addr, ETH_ALEN);
626 		priv->regulatory_domain = hwcfg->i.regulatory_domain;
627 	} else if (at76_is_503rfmd(priv->board_type)) {
628 		ret = at76_get_hw_cfg(priv->udev, hwcfg, sizeof(hwcfg->r3));
629 		if (ret < 0)
630 			goto exit;
631 		memcpy(priv->mac_addr, hwcfg->r3.mac_addr, ETH_ALEN);
632 		priv->regulatory_domain = hwcfg->r3.regulatory_domain;
633 	} else {
634 		ret = at76_get_hw_cfg(priv->udev, hwcfg, sizeof(hwcfg->r5));
635 		if (ret < 0)
636 			goto exit;
637 		memcpy(priv->mac_addr, hwcfg->r5.mac_addr, ETH_ALEN);
638 		priv->regulatory_domain = hwcfg->r5.regulatory_domain;
639 	}
640 
641 exit:
642 	kfree(hwcfg);
643 	if (ret < 0)
644 		wiphy_err(priv->hw->wiphy, "cannot get HW Config (error %d)\n",
645 			  ret);
646 
647 	return ret;
648 }
649 
650 static struct reg_domain const *at76_get_reg_domain(u16 code)
651 {
652 	int i;
653 	static struct reg_domain const fd_tab[] = {
654 		{ 0x10, "FCC (USA)", 0x7ff },	/* ch 1-11 */
655 		{ 0x20, "IC (Canada)", 0x7ff },	/* ch 1-11 */
656 		{ 0x30, "ETSI (most of Europe)", 0x1fff },	/* ch 1-13 */
657 		{ 0x31, "Spain", 0x600 },	/* ch 10-11 */
658 		{ 0x32, "France", 0x1e00 },	/* ch 10-13 */
659 		{ 0x40, "MKK (Japan)", 0x2000 },	/* ch 14 */
660 		{ 0x41, "MKK1 (Japan)", 0x3fff },	/* ch 1-14 */
661 		{ 0x50, "Israel", 0x3fc },	/* ch 3-9 */
662 		{ 0x00, "<unknown>", 0xffffffff }	/* ch 1-32 */
663 	};
664 
665 	/* Last entry is fallback for unknown domain code */
666 	for (i = 0; i < ARRAY_SIZE(fd_tab) - 1; i++)
667 		if (code == fd_tab[i].code)
668 			break;
669 
670 	return &fd_tab[i];
671 }
672 
673 static inline int at76_get_mib(struct usb_device *udev, u16 mib, void *buf,
674 			       int buf_size)
675 {
676 	int ret;
677 
678 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x33,
679 			      USB_TYPE_VENDOR | USB_DIR_IN |
680 			      USB_RECIP_INTERFACE, mib << 8, 0, buf, buf_size,
681 			      USB_CTRL_GET_TIMEOUT);
682 	if (ret >= 0 && ret != buf_size)
683 		return -EIO;
684 	return ret;
685 }
686 
687 /* Return positive number for status, negative for an error */
688 static inline int at76_get_cmd_status(struct usb_device *udev, u8 cmd)
689 {
690 	u8 *stat_buf;
691 	int ret;
692 
693 	stat_buf = kmalloc(40, GFP_NOIO);
694 	if (!stat_buf)
695 		return -ENOMEM;
696 
697 	ret = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0), 0x22,
698 			USB_TYPE_VENDOR | USB_DIR_IN |
699 			USB_RECIP_INTERFACE, cmd, 0, stat_buf,
700 			40, USB_CTRL_GET_TIMEOUT);
701 	if (ret >= 0)
702 		ret = stat_buf[5];
703 	kfree(stat_buf);
704 
705 	return ret;
706 }
707 
708 #define MAKE_CMD_CASE(c) case (c): return #c
709 static const char *at76_get_cmd_string(u8 cmd_status)
710 {
711 	switch (cmd_status) {
712 		MAKE_CMD_CASE(CMD_SET_MIB);
713 		MAKE_CMD_CASE(CMD_GET_MIB);
714 		MAKE_CMD_CASE(CMD_SCAN);
715 		MAKE_CMD_CASE(CMD_JOIN);
716 		MAKE_CMD_CASE(CMD_START_IBSS);
717 		MAKE_CMD_CASE(CMD_RADIO_ON);
718 		MAKE_CMD_CASE(CMD_RADIO_OFF);
719 		MAKE_CMD_CASE(CMD_STARTUP);
720 	}
721 
722 	return "UNKNOWN";
723 }
724 
725 static int at76_set_card_command(struct usb_device *udev, u8 cmd, void *buf,
726 				 int buf_size)
727 {
728 	int ret;
729 	struct at76_command *cmd_buf = kmalloc(sizeof(struct at76_command) +
730 					       buf_size, GFP_KERNEL);
731 
732 	if (!cmd_buf)
733 		return -ENOMEM;
734 
735 	cmd_buf->cmd = cmd;
736 	cmd_buf->reserved = 0;
737 	cmd_buf->size = cpu_to_le16(buf_size);
738 	memcpy(cmd_buf->data, buf, buf_size);
739 
740 	at76_dbg_dump(DBG_CMD, cmd_buf, sizeof(struct at76_command) + buf_size,
741 		      "issuing command %s (0x%02x)",
742 		      at76_get_cmd_string(cmd), cmd);
743 
744 	ret = usb_control_msg(udev, usb_sndctrlpipe(udev, 0), 0x0e,
745 			      USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
746 			      0, 0, cmd_buf,
747 			      sizeof(struct at76_command) + buf_size,
748 			      USB_CTRL_GET_TIMEOUT);
749 	kfree(cmd_buf);
750 	return ret;
751 }
752 
753 #define MAKE_CMD_STATUS_CASE(c)	case (c): return #c
754 static const char *at76_get_cmd_status_string(u8 cmd_status)
755 {
756 	switch (cmd_status) {
757 		MAKE_CMD_STATUS_CASE(CMD_STATUS_IDLE);
758 		MAKE_CMD_STATUS_CASE(CMD_STATUS_COMPLETE);
759 		MAKE_CMD_STATUS_CASE(CMD_STATUS_UNKNOWN);
760 		MAKE_CMD_STATUS_CASE(CMD_STATUS_INVALID_PARAMETER);
761 		MAKE_CMD_STATUS_CASE(CMD_STATUS_FUNCTION_NOT_SUPPORTED);
762 		MAKE_CMD_STATUS_CASE(CMD_STATUS_TIME_OUT);
763 		MAKE_CMD_STATUS_CASE(CMD_STATUS_IN_PROGRESS);
764 		MAKE_CMD_STATUS_CASE(CMD_STATUS_HOST_FAILURE);
765 		MAKE_CMD_STATUS_CASE(CMD_STATUS_SCAN_FAILED);
766 	}
767 
768 	return "UNKNOWN";
769 }
770 
771 /* Wait until the command is completed */
772 static int at76_wait_completion(struct at76_priv *priv, int cmd)
773 {
774 	int status = 0;
775 	unsigned long timeout = jiffies + CMD_COMPLETION_TIMEOUT;
776 
777 	do {
778 		status = at76_get_cmd_status(priv->udev, cmd);
779 		if (status < 0) {
780 			wiphy_err(priv->hw->wiphy,
781 				  "at76_get_cmd_status failed: %d\n",
782 				  status);
783 			break;
784 		}
785 
786 		at76_dbg(DBG_WAIT_COMPLETE,
787 			 "%s: Waiting on cmd %d, status = %d (%s)",
788 			 wiphy_name(priv->hw->wiphy), cmd, status,
789 			 at76_get_cmd_status_string(status));
790 
791 		if (status != CMD_STATUS_IN_PROGRESS
792 		    && status != CMD_STATUS_IDLE)
793 			break;
794 
795 		schedule_timeout_interruptible(HZ / 10);	/* 100 ms */
796 		if (time_after(jiffies, timeout)) {
797 			wiphy_err(priv->hw->wiphy,
798 				  "completion timeout for command %d\n", cmd);
799 			status = -ETIMEDOUT;
800 			break;
801 		}
802 	} while (1);
803 
804 	return status;
805 }
806 
807 static int at76_set_mib(struct at76_priv *priv, struct set_mib_buffer *buf)
808 {
809 	int ret;
810 
811 	ret = at76_set_card_command(priv->udev, CMD_SET_MIB, buf,
812 				    offsetof(struct set_mib_buffer,
813 					     data) + buf->size);
814 	if (ret < 0)
815 		return ret;
816 
817 	ret = at76_wait_completion(priv, CMD_SET_MIB);
818 	if (ret != CMD_STATUS_COMPLETE) {
819 		wiphy_info(priv->hw->wiphy,
820 			   "set_mib: at76_wait_completion failed with %d\n",
821 			   ret);
822 		ret = -EIO;
823 	}
824 
825 	return ret;
826 }
827 
828 /* Return < 0 on error, == 0 if no command sent, == 1 if cmd sent */
829 static int at76_set_radio(struct at76_priv *priv, int enable)
830 {
831 	int ret;
832 	int cmd;
833 
834 	if (priv->radio_on == enable)
835 		return 0;
836 
837 	cmd = enable ? CMD_RADIO_ON : CMD_RADIO_OFF;
838 
839 	ret = at76_set_card_command(priv->udev, cmd, NULL, 0);
840 	if (ret < 0)
841 		wiphy_err(priv->hw->wiphy,
842 			  "at76_set_card_command(%d) failed: %d\n", cmd, ret);
843 	else
844 		ret = 1;
845 
846 	priv->radio_on = enable;
847 	return ret;
848 }
849 
850 /* Set current power save mode (AT76_PM_OFF/AT76_PM_ON/AT76_PM_SMART) */
851 static int at76_set_pm_mode(struct at76_priv *priv)
852 {
853 	int ret = 0;
854 
855 	priv->mib_buf.type = MIB_MAC_MGMT;
856 	priv->mib_buf.size = 1;
857 	priv->mib_buf.index = offsetof(struct mib_mac_mgmt, power_mgmt_mode);
858 	priv->mib_buf.data.byte = priv->pm_mode;
859 
860 	ret = at76_set_mib(priv, &priv->mib_buf);
861 	if (ret < 0)
862 		wiphy_err(priv->hw->wiphy, "set_mib (pm_mode) failed: %d\n",
863 			  ret);
864 
865 	return ret;
866 }
867 
868 static int at76_set_preamble(struct at76_priv *priv, u8 type)
869 {
870 	int ret = 0;
871 
872 	priv->mib_buf.type = MIB_LOCAL;
873 	priv->mib_buf.size = 1;
874 	priv->mib_buf.index = offsetof(struct mib_local, preamble_type);
875 	priv->mib_buf.data.byte = type;
876 
877 	ret = at76_set_mib(priv, &priv->mib_buf);
878 	if (ret < 0)
879 		wiphy_err(priv->hw->wiphy, "set_mib (preamble) failed: %d\n",
880 			  ret);
881 
882 	return ret;
883 }
884 
885 static int at76_set_frag(struct at76_priv *priv, u16 size)
886 {
887 	int ret = 0;
888 
889 	priv->mib_buf.type = MIB_MAC;
890 	priv->mib_buf.size = 2;
891 	priv->mib_buf.index = offsetof(struct mib_mac, frag_threshold);
892 	priv->mib_buf.data.word = cpu_to_le16(size);
893 
894 	ret = at76_set_mib(priv, &priv->mib_buf);
895 	if (ret < 0)
896 		wiphy_err(priv->hw->wiphy,
897 			  "set_mib (frag threshold) failed: %d\n", ret);
898 
899 	return ret;
900 }
901 
902 static int at76_set_rts(struct at76_priv *priv, u16 size)
903 {
904 	int ret = 0;
905 
906 	priv->mib_buf.type = MIB_MAC;
907 	priv->mib_buf.size = 2;
908 	priv->mib_buf.index = offsetof(struct mib_mac, rts_threshold);
909 	priv->mib_buf.data.word = cpu_to_le16(size);
910 
911 	ret = at76_set_mib(priv, &priv->mib_buf);
912 	if (ret < 0)
913 		wiphy_err(priv->hw->wiphy, "set_mib (rts) failed: %d\n", ret);
914 
915 	return ret;
916 }
917 
918 static int at76_set_autorate_fallback(struct at76_priv *priv, int onoff)
919 {
920 	int ret = 0;
921 
922 	priv->mib_buf.type = MIB_LOCAL;
923 	priv->mib_buf.size = 1;
924 	priv->mib_buf.index = offsetof(struct mib_local, txautorate_fallback);
925 	priv->mib_buf.data.byte = onoff;
926 
927 	ret = at76_set_mib(priv, &priv->mib_buf);
928 	if (ret < 0)
929 		wiphy_err(priv->hw->wiphy,
930 			  "set_mib (autorate fallback) failed: %d\n", ret);
931 
932 	return ret;
933 }
934 
935 static void at76_dump_mib_mac_addr(struct at76_priv *priv)
936 {
937 	int i;
938 	int ret;
939 	struct mib_mac_addr *m = kmalloc(sizeof(struct mib_mac_addr),
940 					 GFP_KERNEL);
941 
942 	if (!m)
943 		return;
944 
945 	ret = at76_get_mib(priv->udev, MIB_MAC_ADDR, m,
946 			   sizeof(struct mib_mac_addr));
947 	if (ret < 0) {
948 		wiphy_err(priv->hw->wiphy,
949 			  "at76_get_mib (MAC_ADDR) failed: %d\n", ret);
950 		goto exit;
951 	}
952 
953 	at76_dbg(DBG_MIB, "%s: MIB MAC_ADDR: mac_addr %pM res 0x%x 0x%x",
954 		 wiphy_name(priv->hw->wiphy),
955 		 m->mac_addr, m->res[0], m->res[1]);
956 	for (i = 0; i < ARRAY_SIZE(m->group_addr); i++)
957 		at76_dbg(DBG_MIB, "%s: MIB MAC_ADDR: group addr %d: %pM, "
958 			 "status %d", wiphy_name(priv->hw->wiphy), i,
959 			 m->group_addr[i], m->group_addr_status[i]);
960 exit:
961 	kfree(m);
962 }
963 
964 static void at76_dump_mib_mac_wep(struct at76_priv *priv)
965 {
966 	int i;
967 	int ret;
968 	int key_len;
969 	struct mib_mac_wep *m = kmalloc(sizeof(struct mib_mac_wep), GFP_KERNEL);
970 
971 	if (!m)
972 		return;
973 
974 	ret = at76_get_mib(priv->udev, MIB_MAC_WEP, m,
975 			   sizeof(struct mib_mac_wep));
976 	if (ret < 0) {
977 		wiphy_err(priv->hw->wiphy,
978 			  "at76_get_mib (MAC_WEP) failed: %d\n", ret);
979 		goto exit;
980 	}
981 
982 	at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: priv_invoked %u def_key_id %u "
983 		 "key_len %u excl_unencr %u wep_icv_err %u wep_excluded %u "
984 		 "encr_level %u key %d", wiphy_name(priv->hw->wiphy),
985 		 m->privacy_invoked, m->wep_default_key_id,
986 		 m->wep_key_mapping_len, m->exclude_unencrypted,
987 		 le32_to_cpu(m->wep_icv_error_count),
988 		 le32_to_cpu(m->wep_excluded_count), m->encryption_level,
989 		 m->wep_default_key_id);
990 
991 	key_len = (m->encryption_level == 1) ?
992 	    WEP_SMALL_KEY_LEN : WEP_LARGE_KEY_LEN;
993 
994 	for (i = 0; i < WEP_KEYS; i++)
995 		at76_dbg(DBG_MIB, "%s: MIB MAC_WEP: key %d: %*phD",
996 			 wiphy_name(priv->hw->wiphy), i,
997 			 key_len, m->wep_default_keyvalue[i]);
998 exit:
999 	kfree(m);
1000 }
1001 
1002 static void at76_dump_mib_mac_mgmt(struct at76_priv *priv)
1003 {
1004 	int ret;
1005 	struct mib_mac_mgmt *m = kmalloc(sizeof(struct mib_mac_mgmt),
1006 					 GFP_KERNEL);
1007 
1008 	if (!m)
1009 		return;
1010 
1011 	ret = at76_get_mib(priv->udev, MIB_MAC_MGMT, m,
1012 			   sizeof(struct mib_mac_mgmt));
1013 	if (ret < 0) {
1014 		wiphy_err(priv->hw->wiphy,
1015 			  "at76_get_mib (MAC_MGMT) failed: %d\n", ret);
1016 		goto exit;
1017 	}
1018 
1019 	at76_dbg(DBG_MIB, "%s: MIB MAC_MGMT: beacon_period %d CFP_max_duration "
1020 		 "%d medium_occupancy_limit %d station_id 0x%x ATIM_window %d "
1021 		 "CFP_mode %d privacy_opt_impl %d DTIM_period %d CFP_period %d "
1022 		 "current_bssid %pM current_essid %*phD current_bss_type %d "
1023 		 "pm_mode %d ibss_change %d res %d "
1024 		 "multi_domain_capability_implemented %d "
1025 		 "international_roaming %d country_string %.3s",
1026 		 wiphy_name(priv->hw->wiphy), le16_to_cpu(m->beacon_period),
1027 		 le16_to_cpu(m->CFP_max_duration),
1028 		 le16_to_cpu(m->medium_occupancy_limit),
1029 		 le16_to_cpu(m->station_id), le16_to_cpu(m->ATIM_window),
1030 		 m->CFP_mode, m->privacy_option_implemented, m->DTIM_period,
1031 		 m->CFP_period, m->current_bssid,
1032 		 IW_ESSID_MAX_SIZE, m->current_essid,
1033 		 m->current_bss_type, m->power_mgmt_mode, m->ibss_change,
1034 		 m->res, m->multi_domain_capability_implemented,
1035 		 m->multi_domain_capability_enabled, m->country_string);
1036 exit:
1037 	kfree(m);
1038 }
1039 
1040 static void at76_dump_mib_mac(struct at76_priv *priv)
1041 {
1042 	int ret;
1043 	struct mib_mac *m = kmalloc(sizeof(struct mib_mac), GFP_KERNEL);
1044 
1045 	if (!m)
1046 		return;
1047 
1048 	ret = at76_get_mib(priv->udev, MIB_MAC, m, sizeof(struct mib_mac));
1049 	if (ret < 0) {
1050 		wiphy_err(priv->hw->wiphy,
1051 			  "at76_get_mib (MAC) failed: %d\n", ret);
1052 		goto exit;
1053 	}
1054 
1055 	at76_dbg(DBG_MIB, "%s: MIB MAC: max_tx_msdu_lifetime %d "
1056 		 "max_rx_lifetime %d frag_threshold %d rts_threshold %d "
1057 		 "cwmin %d cwmax %d short_retry_time %d long_retry_time %d "
1058 		 "scan_type %d scan_channel %d probe_delay %u "
1059 		 "min_channel_time %d max_channel_time %d listen_int %d "
1060 		 "desired_ssid %*phD desired_bssid %pM desired_bsstype %d",
1061 		 wiphy_name(priv->hw->wiphy),
1062 		 le32_to_cpu(m->max_tx_msdu_lifetime),
1063 		 le32_to_cpu(m->max_rx_lifetime),
1064 		 le16_to_cpu(m->frag_threshold), le16_to_cpu(m->rts_threshold),
1065 		 le16_to_cpu(m->cwmin), le16_to_cpu(m->cwmax),
1066 		 m->short_retry_time, m->long_retry_time, m->scan_type,
1067 		 m->scan_channel, le16_to_cpu(m->probe_delay),
1068 		 le16_to_cpu(m->min_channel_time),
1069 		 le16_to_cpu(m->max_channel_time),
1070 		 le16_to_cpu(m->listen_interval),
1071 		 IW_ESSID_MAX_SIZE, m->desired_ssid,
1072 		 m->desired_bssid, m->desired_bsstype);
1073 exit:
1074 	kfree(m);
1075 }
1076 
1077 static void at76_dump_mib_phy(struct at76_priv *priv)
1078 {
1079 	int ret;
1080 	struct mib_phy *m = kmalloc(sizeof(struct mib_phy), GFP_KERNEL);
1081 
1082 	if (!m)
1083 		return;
1084 
1085 	ret = at76_get_mib(priv->udev, MIB_PHY, m, sizeof(struct mib_phy));
1086 	if (ret < 0) {
1087 		wiphy_err(priv->hw->wiphy,
1088 			  "at76_get_mib (PHY) failed: %d\n", ret);
1089 		goto exit;
1090 	}
1091 
1092 	at76_dbg(DBG_MIB, "%s: MIB PHY: ed_threshold %d slot_time %d "
1093 		 "sifs_time %d preamble_length %d plcp_header_length %d "
1094 		 "mpdu_max_length %d cca_mode_supported %d operation_rate_set "
1095 		 "0x%x 0x%x 0x%x 0x%x channel_id %d current_cca_mode %d "
1096 		 "phy_type %d current_reg_domain %d",
1097 		 wiphy_name(priv->hw->wiphy), le32_to_cpu(m->ed_threshold),
1098 		 le16_to_cpu(m->slot_time), le16_to_cpu(m->sifs_time),
1099 		 le16_to_cpu(m->preamble_length),
1100 		 le16_to_cpu(m->plcp_header_length),
1101 		 le16_to_cpu(m->mpdu_max_length),
1102 		 le16_to_cpu(m->cca_mode_supported), m->operation_rate_set[0],
1103 		 m->operation_rate_set[1], m->operation_rate_set[2],
1104 		 m->operation_rate_set[3], m->channel_id, m->current_cca_mode,
1105 		 m->phy_type, m->current_reg_domain);
1106 exit:
1107 	kfree(m);
1108 }
1109 
1110 static void at76_dump_mib_local(struct at76_priv *priv)
1111 {
1112 	int ret;
1113 	struct mib_local *m = kmalloc(sizeof(*m), GFP_KERNEL);
1114 
1115 	if (!m)
1116 		return;
1117 
1118 	ret = at76_get_mib(priv->udev, MIB_LOCAL, m, sizeof(*m));
1119 	if (ret < 0) {
1120 		wiphy_err(priv->hw->wiphy,
1121 			  "at76_get_mib (LOCAL) failed: %d\n", ret);
1122 		goto exit;
1123 	}
1124 
1125 	at76_dbg(DBG_MIB, "%s: MIB LOCAL: beacon_enable %d "
1126 		 "txautorate_fallback %d ssid_size %d promiscuous_mode %d "
1127 		 "preamble_type %d", wiphy_name(priv->hw->wiphy),
1128 		 m->beacon_enable,
1129 		 m->txautorate_fallback, m->ssid_size, m->promiscuous_mode,
1130 		 m->preamble_type);
1131 exit:
1132 	kfree(m);
1133 }
1134 
1135 static void at76_dump_mib_mdomain(struct at76_priv *priv)
1136 {
1137 	int ret;
1138 	struct mib_mdomain *m = kmalloc(sizeof(struct mib_mdomain), GFP_KERNEL);
1139 
1140 	if (!m)
1141 		return;
1142 
1143 	ret = at76_get_mib(priv->udev, MIB_MDOMAIN, m,
1144 			   sizeof(struct mib_mdomain));
1145 	if (ret < 0) {
1146 		wiphy_err(priv->hw->wiphy,
1147 			  "at76_get_mib (MDOMAIN) failed: %d\n", ret);
1148 		goto exit;
1149 	}
1150 
1151 	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: channel_list %*phD",
1152 		 wiphy_name(priv->hw->wiphy),
1153 		 (int)sizeof(m->channel_list), m->channel_list);
1154 
1155 	at76_dbg(DBG_MIB, "%s: MIB MDOMAIN: tx_powerlevel %*phD",
1156 		 wiphy_name(priv->hw->wiphy),
1157 		 (int)sizeof(m->tx_powerlevel), m->tx_powerlevel);
1158 exit:
1159 	kfree(m);
1160 }
1161 
1162 /* Enable monitor mode */
1163 static int at76_start_monitor(struct at76_priv *priv)
1164 {
1165 	struct at76_req_scan scan;
1166 	int ret;
1167 
1168 	memset(&scan, 0, sizeof(struct at76_req_scan));
1169 	eth_broadcast_addr(scan.bssid);
1170 
1171 	scan.channel = priv->channel;
1172 	scan.scan_type = SCAN_TYPE_PASSIVE;
1173 	scan.international_scan = 0;
1174 	scan.min_channel_time = cpu_to_le16(priv->scan_min_time);
1175 	scan.max_channel_time = cpu_to_le16(priv->scan_max_time);
1176 	scan.probe_delay = cpu_to_le16(0);
1177 
1178 	ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
1179 	if (ret >= 0)
1180 		ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
1181 
1182 	return ret;
1183 }
1184 
1185 /* Calculate padding from txbuf->wlength (which excludes the USB TX header),
1186    likely to compensate a flaw in the AT76C503A USB part ... */
1187 static inline int at76_calc_padding(int wlen)
1188 {
1189 	/* add the USB TX header */
1190 	wlen += AT76_TX_HDRLEN;
1191 
1192 	wlen = wlen % 64;
1193 
1194 	if (wlen < 50)
1195 		return 50 - wlen;
1196 
1197 	if (wlen >= 61)
1198 		return 64 + 50 - wlen;
1199 
1200 	return 0;
1201 }
1202 
1203 static void at76_rx_callback(struct urb *urb)
1204 {
1205 	struct at76_priv *priv = urb->context;
1206 
1207 	priv->rx_tasklet.data = (unsigned long)urb;
1208 	tasklet_schedule(&priv->rx_tasklet);
1209 }
1210 
1211 static int at76_submit_rx_urb(struct at76_priv *priv)
1212 {
1213 	int ret;
1214 	int size;
1215 	struct sk_buff *skb = priv->rx_skb;
1216 
1217 	if (!priv->rx_urb) {
1218 		wiphy_err(priv->hw->wiphy, "%s: priv->rx_urb is NULL\n",
1219 			  __func__);
1220 		return -EFAULT;
1221 	}
1222 
1223 	if (!skb) {
1224 		skb = dev_alloc_skb(sizeof(struct at76_rx_buffer));
1225 		if (!skb) {
1226 			wiphy_err(priv->hw->wiphy,
1227 				  "cannot allocate rx skbuff\n");
1228 			ret = -ENOMEM;
1229 			goto exit;
1230 		}
1231 		priv->rx_skb = skb;
1232 	} else {
1233 		skb_push(skb, skb_headroom(skb));
1234 		skb_trim(skb, 0);
1235 	}
1236 
1237 	size = skb_tailroom(skb);
1238 	usb_fill_bulk_urb(priv->rx_urb, priv->udev, priv->rx_pipe,
1239 			  skb_put(skb, size), size, at76_rx_callback, priv);
1240 	ret = usb_submit_urb(priv->rx_urb, GFP_ATOMIC);
1241 	if (ret < 0) {
1242 		if (ret == -ENODEV)
1243 			at76_dbg(DBG_DEVSTART,
1244 				 "usb_submit_urb returned -ENODEV");
1245 		else
1246 			wiphy_err(priv->hw->wiphy,
1247 				  "rx, usb_submit_urb failed: %d\n", ret);
1248 	}
1249 
1250 exit:
1251 	if (ret < 0 && ret != -ENODEV)
1252 		wiphy_err(priv->hw->wiphy,
1253 			  "cannot submit rx urb - please unload the driver and/or power cycle the device\n");
1254 
1255 	return ret;
1256 }
1257 
1258 /* Download external firmware */
1259 static int at76_load_external_fw(struct usb_device *udev, struct fwentry *fwe)
1260 {
1261 	int ret;
1262 	int op_mode;
1263 	int blockno = 0;
1264 	int bsize;
1265 	u8 *block;
1266 	u8 *buf = fwe->extfw;
1267 	int size = fwe->extfw_size;
1268 
1269 	if (!buf || !size)
1270 		return -ENOENT;
1271 
1272 	op_mode = at76_get_op_mode(udev);
1273 	at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
1274 
1275 	if (op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
1276 		dev_err(&udev->dev, "unexpected opmode %d\n", op_mode);
1277 		return -EINVAL;
1278 	}
1279 
1280 	block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
1281 	if (!block)
1282 		return -ENOMEM;
1283 
1284 	at76_dbg(DBG_DEVSTART, "downloading external firmware");
1285 
1286 	/* for fw >= 0.100, the device needs an extra empty block */
1287 	do {
1288 		bsize = min_t(int, size, FW_BLOCK_SIZE);
1289 		memcpy(block, buf, bsize);
1290 		at76_dbg(DBG_DEVSTART,
1291 			 "ext fw, size left = %5d, bsize = %4d, blockno = %2d",
1292 			 size, bsize, blockno);
1293 		ret = at76_load_ext_fw_block(udev, blockno, block, bsize);
1294 		if (ret != bsize) {
1295 			dev_err(&udev->dev,
1296 				"loading %dth firmware block failed: %d\n",
1297 				blockno, ret);
1298 			ret = -EIO;
1299 			goto exit;
1300 		}
1301 		buf += bsize;
1302 		size -= bsize;
1303 		blockno++;
1304 	} while (bsize > 0);
1305 
1306 	if (at76_is_505a(fwe->board_type)) {
1307 		at76_dbg(DBG_DEVSTART, "200 ms delay for 505a");
1308 		schedule_timeout_interruptible(HZ / 5 + 1);
1309 	}
1310 
1311 exit:
1312 	kfree(block);
1313 	if (ret < 0)
1314 		dev_err(&udev->dev,
1315 			"downloading external firmware failed: %d\n", ret);
1316 	return ret;
1317 }
1318 
1319 /* Download internal firmware */
1320 static int at76_load_internal_fw(struct usb_device *udev, struct fwentry *fwe)
1321 {
1322 	int ret;
1323 	int need_remap = !at76_is_505a(fwe->board_type);
1324 
1325 	ret = at76_usbdfu_download(udev, fwe->intfw, fwe->intfw_size,
1326 				   need_remap ? 0 : 2 * HZ);
1327 
1328 	if (ret < 0) {
1329 		dev_err(&udev->dev,
1330 			"downloading internal fw failed with %d\n", ret);
1331 		goto exit;
1332 	}
1333 
1334 	at76_dbg(DBG_DEVSTART, "sending REMAP");
1335 
1336 	/* no REMAP for 505A (see SF driver) */
1337 	if (need_remap) {
1338 		ret = at76_remap(udev);
1339 		if (ret < 0) {
1340 			dev_err(&udev->dev,
1341 				"sending REMAP failed with %d\n", ret);
1342 			goto exit;
1343 		}
1344 	}
1345 
1346 	at76_dbg(DBG_DEVSTART, "sleeping for 2 seconds");
1347 	schedule_timeout_interruptible(2 * HZ + 1);
1348 	usb_reset_device(udev);
1349 
1350 exit:
1351 	return ret;
1352 }
1353 
1354 static int at76_startup_device(struct at76_priv *priv)
1355 {
1356 	struct at76_card_config *ccfg = &priv->card_config;
1357 	int ret;
1358 
1359 	at76_dbg(DBG_PARAMS,
1360 		 "%s param: ssid %.*s (%*phD) mode %s ch %d wep %s key %d "
1361 		 "keylen %d", wiphy_name(priv->hw->wiphy), priv->essid_size,
1362 		 priv->essid, IW_ESSID_MAX_SIZE, priv->essid,
1363 		 priv->iw_mode == IW_MODE_ADHOC ? "adhoc" : "infra",
1364 		 priv->channel, priv->wep_enabled ? "enabled" : "disabled",
1365 		 priv->wep_key_id, priv->wep_keys_len[priv->wep_key_id]);
1366 	at76_dbg(DBG_PARAMS,
1367 		 "%s param: preamble %s rts %d retry %d frag %d "
1368 		 "txrate %s auth_mode %d", wiphy_name(priv->hw->wiphy),
1369 		 preambles[priv->preamble_type], priv->rts_threshold,
1370 		 priv->short_retry_limit, priv->frag_threshold,
1371 		 priv->txrate == TX_RATE_1MBIT ? "1MBit" : priv->txrate ==
1372 		 TX_RATE_2MBIT ? "2MBit" : priv->txrate ==
1373 		 TX_RATE_5_5MBIT ? "5.5MBit" : priv->txrate ==
1374 		 TX_RATE_11MBIT ? "11MBit" : priv->txrate ==
1375 		 TX_RATE_AUTO ? "auto" : "<invalid>", priv->auth_mode);
1376 	at76_dbg(DBG_PARAMS,
1377 		 "%s param: pm_mode %d pm_period %d auth_mode %s "
1378 		 "scan_times %d %d scan_mode %s",
1379 		 wiphy_name(priv->hw->wiphy), priv->pm_mode, priv->pm_period,
1380 		 priv->auth_mode == WLAN_AUTH_OPEN ? "open" : "shared_secret",
1381 		 priv->scan_min_time, priv->scan_max_time,
1382 		 priv->scan_mode == SCAN_TYPE_ACTIVE ? "active" : "passive");
1383 
1384 	memset(ccfg, 0, sizeof(struct at76_card_config));
1385 	ccfg->promiscuous_mode = 0;
1386 	ccfg->short_retry_limit = priv->short_retry_limit;
1387 
1388 	if (priv->wep_enabled) {
1389 		if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
1390 			ccfg->encryption_type = 2;
1391 		else
1392 			ccfg->encryption_type = 1;
1393 
1394 		/* jal: always exclude unencrypted if WEP is active */
1395 		ccfg->exclude_unencrypted = 1;
1396 	} else {
1397 		ccfg->exclude_unencrypted = 0;
1398 		ccfg->encryption_type = 0;
1399 	}
1400 
1401 	ccfg->rts_threshold = cpu_to_le16(priv->rts_threshold);
1402 	ccfg->fragmentation_threshold = cpu_to_le16(priv->frag_threshold);
1403 
1404 	memcpy(ccfg->basic_rate_set, hw_rates, 4);
1405 	/* jal: really needed, we do a set_mib for autorate later ??? */
1406 	ccfg->auto_rate_fallback = (priv->txrate == TX_RATE_AUTO ? 1 : 0);
1407 	ccfg->channel = priv->channel;
1408 	ccfg->privacy_invoked = priv->wep_enabled;
1409 	memcpy(ccfg->current_ssid, priv->essid, IW_ESSID_MAX_SIZE);
1410 	ccfg->ssid_len = priv->essid_size;
1411 
1412 	ccfg->wep_default_key_id = priv->wep_key_id;
1413 	memcpy(ccfg->wep_default_key_value, priv->wep_keys,
1414 	       sizeof(priv->wep_keys));
1415 
1416 	ccfg->short_preamble = priv->preamble_type;
1417 	ccfg->beacon_period = cpu_to_le16(priv->beacon_period);
1418 
1419 	ret = at76_set_card_command(priv->udev, CMD_STARTUP, &priv->card_config,
1420 				    sizeof(struct at76_card_config));
1421 	if (ret < 0) {
1422 		wiphy_err(priv->hw->wiphy, "at76_set_card_command failed: %d\n",
1423 			  ret);
1424 		return ret;
1425 	}
1426 
1427 	at76_wait_completion(priv, CMD_STARTUP);
1428 
1429 	/* remove BSSID from previous run */
1430 	eth_zero_addr(priv->bssid);
1431 
1432 	priv->scanning = false;
1433 
1434 	if (at76_set_radio(priv, 1) == 1)
1435 		at76_wait_completion(priv, CMD_RADIO_ON);
1436 
1437 	ret = at76_set_preamble(priv, priv->preamble_type);
1438 	if (ret < 0)
1439 		return ret;
1440 
1441 	ret = at76_set_frag(priv, priv->frag_threshold);
1442 	if (ret < 0)
1443 		return ret;
1444 
1445 	ret = at76_set_rts(priv, priv->rts_threshold);
1446 	if (ret < 0)
1447 		return ret;
1448 
1449 	ret = at76_set_autorate_fallback(priv,
1450 					 priv->txrate == TX_RATE_AUTO ? 1 : 0);
1451 	if (ret < 0)
1452 		return ret;
1453 
1454 	ret = at76_set_pm_mode(priv);
1455 	if (ret < 0)
1456 		return ret;
1457 
1458 	if (at76_debug & DBG_MIB) {
1459 		at76_dump_mib_mac(priv);
1460 		at76_dump_mib_mac_addr(priv);
1461 		at76_dump_mib_mac_mgmt(priv);
1462 		at76_dump_mib_mac_wep(priv);
1463 		at76_dump_mib_mdomain(priv);
1464 		at76_dump_mib_phy(priv);
1465 		at76_dump_mib_local(priv);
1466 	}
1467 
1468 	return 0;
1469 }
1470 
1471 /* Enable or disable promiscuous mode */
1472 static void at76_work_set_promisc(struct work_struct *work)
1473 {
1474 	struct at76_priv *priv = container_of(work, struct at76_priv,
1475 					      work_set_promisc);
1476 	int ret = 0;
1477 
1478 	if (priv->device_unplugged)
1479 		return;
1480 
1481 	mutex_lock(&priv->mtx);
1482 
1483 	priv->mib_buf.type = MIB_LOCAL;
1484 	priv->mib_buf.size = 1;
1485 	priv->mib_buf.index = offsetof(struct mib_local, promiscuous_mode);
1486 	priv->mib_buf.data.byte = priv->promisc ? 1 : 0;
1487 
1488 	ret = at76_set_mib(priv, &priv->mib_buf);
1489 	if (ret < 0)
1490 		wiphy_err(priv->hw->wiphy,
1491 			  "set_mib (promiscuous_mode) failed: %d\n", ret);
1492 
1493 	mutex_unlock(&priv->mtx);
1494 }
1495 
1496 /* Submit Rx urb back to the device */
1497 static void at76_work_submit_rx(struct work_struct *work)
1498 {
1499 	struct at76_priv *priv = container_of(work, struct at76_priv,
1500 					      work_submit_rx);
1501 
1502 	mutex_lock(&priv->mtx);
1503 	at76_submit_rx_urb(priv);
1504 	mutex_unlock(&priv->mtx);
1505 }
1506 
1507 /* This is a workaround to make scan working:
1508  * currently mac80211 does not process frames with no frequency
1509  * information.
1510  * However during scan the HW performs a sweep by itself, and we
1511  * are unable to know where the radio is actually tuned.
1512  * This function tries to do its best to guess this information..
1513  * During scan, If the current frame is a beacon or a probe response,
1514  * the channel information is extracted from it.
1515  * When not scanning, for other frames, or if it happens that for
1516  * whatever reason we fail to parse beacons and probe responses, this
1517  * function returns the priv->channel information, that should be correct
1518  * at least when we are not scanning.
1519  */
1520 static inline int at76_guess_freq(struct at76_priv *priv)
1521 {
1522 	size_t el_off;
1523 	const u8 *el;
1524 	int channel = priv->channel;
1525 	int len = priv->rx_skb->len;
1526 	struct ieee80211_hdr *hdr = (void *)priv->rx_skb->data;
1527 
1528 	if (!priv->scanning)
1529 		goto exit;
1530 
1531 	if (len < 24)
1532 		goto exit;
1533 
1534 	if (ieee80211_is_probe_resp(hdr->frame_control)) {
1535 		el_off = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
1536 		el = ((struct ieee80211_mgmt *)hdr)->u.probe_resp.variable;
1537 	} else if (ieee80211_is_beacon(hdr->frame_control)) {
1538 		el_off = offsetof(struct ieee80211_mgmt, u.beacon.variable);
1539 		el = ((struct ieee80211_mgmt *)hdr)->u.beacon.variable;
1540 	} else {
1541 		goto exit;
1542 	}
1543 	len -= el_off;
1544 
1545 	el = cfg80211_find_ie(WLAN_EID_DS_PARAMS, el, len);
1546 	if (el && el[1] > 0)
1547 		channel = el[2];
1548 
1549 exit:
1550 	return ieee80211_channel_to_frequency(channel, NL80211_BAND_2GHZ);
1551 }
1552 
1553 static void at76_rx_tasklet(unsigned long param)
1554 {
1555 	struct urb *urb = (struct urb *)param;
1556 	struct at76_priv *priv = urb->context;
1557 	struct at76_rx_buffer *buf;
1558 	struct ieee80211_rx_status rx_status = { 0 };
1559 
1560 	if (priv->device_unplugged) {
1561 		at76_dbg(DBG_DEVSTART, "device unplugged");
1562 		at76_dbg(DBG_DEVSTART, "urb status %d", urb->status);
1563 		return;
1564 	}
1565 
1566 	if (!priv->rx_skb || !priv->rx_skb->data)
1567 		return;
1568 
1569 	buf = (struct at76_rx_buffer *)priv->rx_skb->data;
1570 
1571 	if (urb->status != 0) {
1572 		if (urb->status != -ENOENT && urb->status != -ECONNRESET)
1573 			at76_dbg(DBG_URB,
1574 				 "%s %s: - nonzero Rx bulk status received: %d",
1575 				 __func__, wiphy_name(priv->hw->wiphy),
1576 				 urb->status);
1577 		return;
1578 	}
1579 
1580 	at76_dbg(DBG_RX_ATMEL_HDR,
1581 		 "%s: rx frame: rate %d rssi %d noise %d link %d",
1582 		 wiphy_name(priv->hw->wiphy), buf->rx_rate, buf->rssi,
1583 		 buf->noise_level, buf->link_quality);
1584 
1585 	skb_pull(priv->rx_skb, AT76_RX_HDRLEN);
1586 	skb_trim(priv->rx_skb, le16_to_cpu(buf->wlength));
1587 	at76_dbg_dump(DBG_RX_DATA, priv->rx_skb->data,
1588 		      priv->rx_skb->len, "RX: len=%d", priv->rx_skb->len);
1589 
1590 	rx_status.signal = buf->rssi;
1591 	rx_status.flag |= RX_FLAG_DECRYPTED;
1592 	rx_status.flag |= RX_FLAG_IV_STRIPPED;
1593 	rx_status.band = NL80211_BAND_2GHZ;
1594 	rx_status.freq = at76_guess_freq(priv);
1595 
1596 	at76_dbg(DBG_MAC80211, "calling ieee80211_rx_irqsafe(): %d/%d",
1597 		 priv->rx_skb->len, priv->rx_skb->data_len);
1598 	memcpy(IEEE80211_SKB_RXCB(priv->rx_skb), &rx_status, sizeof(rx_status));
1599 	ieee80211_rx_irqsafe(priv->hw, priv->rx_skb);
1600 
1601 	/* Use a new skb for the next receive */
1602 	priv->rx_skb = NULL;
1603 
1604 	at76_submit_rx_urb(priv);
1605 }
1606 
1607 /* Load firmware into kernel memory and parse it */
1608 static struct fwentry *at76_load_firmware(struct usb_device *udev,
1609 					  enum board_type board_type)
1610 {
1611 	int ret;
1612 	char *str;
1613 	struct at76_fw_header *fwh;
1614 	struct fwentry *fwe = &firmwares[board_type];
1615 
1616 	mutex_lock(&fw_mutex);
1617 
1618 	if (fwe->loaded) {
1619 		at76_dbg(DBG_FW, "re-using previously loaded fw");
1620 		goto exit;
1621 	}
1622 
1623 	at76_dbg(DBG_FW, "downloading firmware %s", fwe->fwname);
1624 	ret = request_firmware(&fwe->fw, fwe->fwname, &udev->dev);
1625 	if (ret < 0) {
1626 		dev_err(&udev->dev, "firmware %s not found!\n",
1627 			fwe->fwname);
1628 		dev_err(&udev->dev,
1629 			"you may need to download the firmware from http://developer.berlios.de/projects/at76c503a/\n");
1630 		goto exit;
1631 	}
1632 
1633 	at76_dbg(DBG_FW, "got it.");
1634 	fwh = (struct at76_fw_header *)(fwe->fw->data);
1635 
1636 	if (fwe->fw->size <= sizeof(*fwh)) {
1637 		dev_err(&udev->dev,
1638 			"firmware is too short (0x%zx)\n", fwe->fw->size);
1639 		goto exit;
1640 	}
1641 
1642 	/* CRC currently not checked */
1643 	fwe->board_type = le32_to_cpu(fwh->board_type);
1644 	if (fwe->board_type != board_type) {
1645 		dev_err(&udev->dev,
1646 			"board type mismatch, requested %u, got %u\n",
1647 			board_type, fwe->board_type);
1648 		goto exit;
1649 	}
1650 
1651 	fwe->fw_version.major = fwh->major;
1652 	fwe->fw_version.minor = fwh->minor;
1653 	fwe->fw_version.patch = fwh->patch;
1654 	fwe->fw_version.build = fwh->build;
1655 
1656 	str = (char *)fwh + le32_to_cpu(fwh->str_offset);
1657 	fwe->intfw = (u8 *)fwh + le32_to_cpu(fwh->int_fw_offset);
1658 	fwe->intfw_size = le32_to_cpu(fwh->int_fw_len);
1659 	fwe->extfw = (u8 *)fwh + le32_to_cpu(fwh->ext_fw_offset);
1660 	fwe->extfw_size = le32_to_cpu(fwh->ext_fw_len);
1661 
1662 	fwe->loaded = 1;
1663 
1664 	dev_printk(KERN_DEBUG, &udev->dev,
1665 		   "using firmware %s (version %d.%d.%d-%d)\n",
1666 		   fwe->fwname, fwh->major, fwh->minor, fwh->patch, fwh->build);
1667 
1668 	at76_dbg(DBG_DEVSTART, "board %u, int %d:%d, ext %d:%d", board_type,
1669 		 le32_to_cpu(fwh->int_fw_offset), le32_to_cpu(fwh->int_fw_len),
1670 		 le32_to_cpu(fwh->ext_fw_offset), le32_to_cpu(fwh->ext_fw_len));
1671 	at76_dbg(DBG_DEVSTART, "firmware id %s", str);
1672 
1673 exit:
1674 	mutex_unlock(&fw_mutex);
1675 
1676 	if (fwe->loaded)
1677 		return fwe;
1678 	else
1679 		return NULL;
1680 }
1681 
1682 static int at76_join(struct at76_priv *priv)
1683 {
1684 	struct at76_req_join join;
1685 	int ret;
1686 
1687 	memset(&join, 0, sizeof(struct at76_req_join));
1688 	memcpy(join.essid, priv->essid, priv->essid_size);
1689 	join.essid_size = priv->essid_size;
1690 	memcpy(join.bssid, priv->bssid, ETH_ALEN);
1691 	join.bss_type = INFRASTRUCTURE_MODE;
1692 	join.channel = priv->channel;
1693 	join.timeout = cpu_to_le16(2000);
1694 
1695 	at76_dbg(DBG_MAC80211, "%s: sending CMD_JOIN", __func__);
1696 	ret = at76_set_card_command(priv->udev, CMD_JOIN, &join,
1697 				    sizeof(struct at76_req_join));
1698 
1699 	if (ret < 0) {
1700 		wiphy_err(priv->hw->wiphy, "at76_set_card_command failed: %d\n",
1701 			  ret);
1702 		return 0;
1703 	}
1704 
1705 	ret = at76_wait_completion(priv, CMD_JOIN);
1706 	at76_dbg(DBG_MAC80211, "%s: CMD_JOIN returned: 0x%02x", __func__, ret);
1707 	if (ret != CMD_STATUS_COMPLETE) {
1708 		wiphy_err(priv->hw->wiphy, "at76_wait_completion failed: %d\n",
1709 			  ret);
1710 		return 0;
1711 	}
1712 
1713 	at76_set_pm_mode(priv);
1714 
1715 	return 0;
1716 }
1717 
1718 static void at76_work_join_bssid(struct work_struct *work)
1719 {
1720 	struct at76_priv *priv = container_of(work, struct at76_priv,
1721 					      work_join_bssid);
1722 
1723 	if (priv->device_unplugged)
1724 		return;
1725 
1726 	mutex_lock(&priv->mtx);
1727 
1728 	if (is_valid_ether_addr(priv->bssid))
1729 		at76_join(priv);
1730 
1731 	mutex_unlock(&priv->mtx);
1732 }
1733 
1734 static void at76_mac80211_tx_callback(struct urb *urb)
1735 {
1736 	struct at76_priv *priv = urb->context;
1737 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
1738 
1739 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1740 
1741 	switch (urb->status) {
1742 	case 0:
1743 		/* success */
1744 		info->flags |= IEEE80211_TX_STAT_ACK;
1745 		break;
1746 	case -ENOENT:
1747 	case -ECONNRESET:
1748 		/* fail, urb has been unlinked */
1749 		/* FIXME: add error message */
1750 		break;
1751 	default:
1752 		at76_dbg(DBG_URB, "%s - nonzero tx status received: %d",
1753 			 __func__, urb->status);
1754 		break;
1755 	}
1756 
1757 	memset(&info->status, 0, sizeof(info->status));
1758 
1759 	ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
1760 
1761 	priv->tx_skb = NULL;
1762 
1763 	ieee80211_wake_queues(priv->hw);
1764 }
1765 
1766 static void at76_mac80211_tx(struct ieee80211_hw *hw,
1767 			     struct ieee80211_tx_control *control,
1768 			     struct sk_buff *skb)
1769 {
1770 	struct at76_priv *priv = hw->priv;
1771 	struct at76_tx_buffer *tx_buffer = priv->bulk_out_buffer;
1772 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1773 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1774 	int padding, submit_len, ret;
1775 
1776 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1777 
1778 	if (priv->tx_urb->status == -EINPROGRESS) {
1779 		wiphy_err(priv->hw->wiphy,
1780 			  "%s called while tx urb is pending\n", __func__);
1781 		dev_kfree_skb_any(skb);
1782 		return;
1783 	}
1784 
1785 	/* The following code lines are important when the device is going to
1786 	 * authenticate with a new bssid. The driver must send CMD_JOIN before
1787 	 * an authentication frame is transmitted. For this to succeed, the
1788 	 * correct bssid of the AP must be known. As mac80211 does not inform
1789 	 * drivers about the bssid prior to the authentication process the
1790 	 * following workaround is necessary. If the TX frame is an
1791 	 * authentication frame extract the bssid and send the CMD_JOIN. */
1792 	if (mgmt->frame_control & cpu_to_le16(IEEE80211_STYPE_AUTH)) {
1793 		if (!ether_addr_equal_64bits(priv->bssid, mgmt->bssid)) {
1794 			memcpy(priv->bssid, mgmt->bssid, ETH_ALEN);
1795 			ieee80211_queue_work(hw, &priv->work_join_bssid);
1796 			dev_kfree_skb_any(skb);
1797 			return;
1798 		}
1799 	}
1800 
1801 	ieee80211_stop_queues(hw);
1802 
1803 	at76_ledtrig_tx_activity();	/* tell ledtrigger we send a packet */
1804 
1805 	WARN_ON(priv->tx_skb != NULL);
1806 
1807 	priv->tx_skb = skb;
1808 	padding = at76_calc_padding(skb->len);
1809 	submit_len = AT76_TX_HDRLEN + skb->len + padding;
1810 
1811 	/* setup 'Atmel' header */
1812 	memset(tx_buffer, 0, sizeof(*tx_buffer));
1813 	tx_buffer->padding = padding;
1814 	tx_buffer->wlength = cpu_to_le16(skb->len);
1815 	tx_buffer->tx_rate = ieee80211_get_tx_rate(hw, info)->hw_value;
1816 	memset(tx_buffer->reserved, 0, sizeof(tx_buffer->reserved));
1817 	memcpy(tx_buffer->packet, skb->data, skb->len);
1818 
1819 	at76_dbg(DBG_TX_DATA, "%s tx: wlen 0x%x pad 0x%x rate %d hdr",
1820 		 wiphy_name(priv->hw->wiphy), le16_to_cpu(tx_buffer->wlength),
1821 		 tx_buffer->padding, tx_buffer->tx_rate);
1822 
1823 	/* send stuff */
1824 	at76_dbg_dump(DBG_TX_DATA_CONTENT, tx_buffer, submit_len,
1825 		      "%s(): tx_buffer %d bytes:", __func__, submit_len);
1826 	usb_fill_bulk_urb(priv->tx_urb, priv->udev, priv->tx_pipe, tx_buffer,
1827 			  submit_len, at76_mac80211_tx_callback, priv);
1828 	ret = usb_submit_urb(priv->tx_urb, GFP_ATOMIC);
1829 	if (ret) {
1830 		wiphy_err(priv->hw->wiphy, "error in tx submit urb: %d\n", ret);
1831 		if (ret == -EINVAL)
1832 			wiphy_err(priv->hw->wiphy,
1833 				  "-EINVAL: tx urb %p hcpriv %p complete %p\n",
1834 				  priv->tx_urb,
1835 				  priv->tx_urb->hcpriv, priv->tx_urb->complete);
1836 	}
1837 }
1838 
1839 static int at76_mac80211_start(struct ieee80211_hw *hw)
1840 {
1841 	struct at76_priv *priv = hw->priv;
1842 	int ret;
1843 
1844 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1845 
1846 	mutex_lock(&priv->mtx);
1847 
1848 	ret = at76_submit_rx_urb(priv);
1849 	if (ret < 0) {
1850 		wiphy_err(priv->hw->wiphy, "open: submit_rx_urb failed: %d\n",
1851 			  ret);
1852 		goto error;
1853 	}
1854 
1855 	at76_startup_device(priv);
1856 
1857 	at76_start_monitor(priv);
1858 
1859 error:
1860 	mutex_unlock(&priv->mtx);
1861 
1862 	return 0;
1863 }
1864 
1865 static void at76_mac80211_stop(struct ieee80211_hw *hw)
1866 {
1867 	struct at76_priv *priv = hw->priv;
1868 
1869 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1870 
1871 	cancel_delayed_work(&priv->dwork_hw_scan);
1872 	cancel_work_sync(&priv->work_join_bssid);
1873 	cancel_work_sync(&priv->work_set_promisc);
1874 
1875 	mutex_lock(&priv->mtx);
1876 
1877 	if (!priv->device_unplugged) {
1878 		/* We are called by "ifconfig ethX down", not because the
1879 		 * device is not available anymore. */
1880 		at76_set_radio(priv, 0);
1881 
1882 		/* We unlink rx_urb because at76_open() re-submits it.
1883 		 * If unplugged, at76_delete_device() takes care of it. */
1884 		usb_kill_urb(priv->rx_urb);
1885 	}
1886 
1887 	mutex_unlock(&priv->mtx);
1888 }
1889 
1890 static int at76_add_interface(struct ieee80211_hw *hw,
1891 			      struct ieee80211_vif *vif)
1892 {
1893 	struct at76_priv *priv = hw->priv;
1894 	int ret = 0;
1895 
1896 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1897 
1898 	mutex_lock(&priv->mtx);
1899 
1900 	switch (vif->type) {
1901 	case NL80211_IFTYPE_STATION:
1902 		priv->iw_mode = IW_MODE_INFRA;
1903 		break;
1904 	default:
1905 		ret = -EOPNOTSUPP;
1906 		goto exit;
1907 	}
1908 
1909 exit:
1910 	mutex_unlock(&priv->mtx);
1911 
1912 	return ret;
1913 }
1914 
1915 static void at76_remove_interface(struct ieee80211_hw *hw,
1916 				  struct ieee80211_vif *vif)
1917 {
1918 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1919 }
1920 
1921 static void at76_dwork_hw_scan(struct work_struct *work)
1922 {
1923 	struct at76_priv *priv = container_of(work, struct at76_priv,
1924 					      dwork_hw_scan.work);
1925 	struct cfg80211_scan_info info = {
1926 		.aborted = false,
1927 	};
1928 	int ret;
1929 
1930 	if (priv->device_unplugged)
1931 		return;
1932 
1933 	mutex_lock(&priv->mtx);
1934 
1935 	ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
1936 	at76_dbg(DBG_MAC80211, "%s: CMD_SCAN status 0x%02x", __func__, ret);
1937 
1938 	/* FIXME: add maximum time for scan to complete */
1939 
1940 	if (ret != CMD_STATUS_COMPLETE) {
1941 		ieee80211_queue_delayed_work(priv->hw, &priv->dwork_hw_scan,
1942 					     SCAN_POLL_INTERVAL);
1943 		mutex_unlock(&priv->mtx);
1944 		return;
1945 	}
1946 
1947 	if (is_valid_ether_addr(priv->bssid))
1948 		at76_join(priv);
1949 
1950 	priv->scanning = false;
1951 
1952 	mutex_unlock(&priv->mtx);
1953 
1954 	ieee80211_scan_completed(priv->hw, &info);
1955 
1956 	ieee80211_wake_queues(priv->hw);
1957 }
1958 
1959 static int at76_hw_scan(struct ieee80211_hw *hw,
1960 			struct ieee80211_vif *vif,
1961 			struct ieee80211_scan_request *hw_req)
1962 {
1963 	struct cfg80211_scan_request *req = &hw_req->req;
1964 	struct at76_priv *priv = hw->priv;
1965 	struct at76_req_scan scan;
1966 	u8 *ssid = NULL;
1967 	int ret, len = 0;
1968 
1969 	at76_dbg(DBG_MAC80211, "%s():", __func__);
1970 
1971 	if (priv->device_unplugged)
1972 		return 0;
1973 
1974 	mutex_lock(&priv->mtx);
1975 
1976 	ieee80211_stop_queues(hw);
1977 
1978 	memset(&scan, 0, sizeof(struct at76_req_scan));
1979 	eth_broadcast_addr(scan.bssid);
1980 
1981 	if (req->n_ssids) {
1982 		scan.scan_type = SCAN_TYPE_ACTIVE;
1983 		ssid = req->ssids[0].ssid;
1984 		len = req->ssids[0].ssid_len;
1985 	} else {
1986 		scan.scan_type = SCAN_TYPE_PASSIVE;
1987 	}
1988 
1989 	if (len) {
1990 		memcpy(scan.essid, ssid, len);
1991 		scan.essid_size = len;
1992 	}
1993 
1994 	scan.min_channel_time = cpu_to_le16(priv->scan_min_time);
1995 	scan.max_channel_time = cpu_to_le16(priv->scan_max_time);
1996 	scan.probe_delay = cpu_to_le16(priv->scan_min_time * 1000);
1997 	scan.international_scan = 0;
1998 
1999 	at76_dbg(DBG_MAC80211, "%s: sending CMD_SCAN", __func__);
2000 	ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
2001 
2002 	if (ret < 0) {
2003 		wiphy_err(priv->hw->wiphy, "CMD_SCAN failed: %d\n", ret);
2004 		goto exit;
2005 	}
2006 
2007 	priv->scanning = true;
2008 	ieee80211_queue_delayed_work(priv->hw, &priv->dwork_hw_scan,
2009 				     SCAN_POLL_INTERVAL);
2010 
2011 exit:
2012 	mutex_unlock(&priv->mtx);
2013 
2014 	return 0;
2015 }
2016 
2017 static int at76_config(struct ieee80211_hw *hw, u32 changed)
2018 {
2019 	struct at76_priv *priv = hw->priv;
2020 
2021 	at76_dbg(DBG_MAC80211, "%s(): channel %d",
2022 		 __func__, hw->conf.chandef.chan->hw_value);
2023 	at76_dbg_dump(DBG_MAC80211, priv->bssid, ETH_ALEN, "bssid:");
2024 
2025 	mutex_lock(&priv->mtx);
2026 
2027 	priv->channel = hw->conf.chandef.chan->hw_value;
2028 
2029 	if (is_valid_ether_addr(priv->bssid))
2030 		at76_join(priv);
2031 	else
2032 		at76_start_monitor(priv);
2033 
2034 	mutex_unlock(&priv->mtx);
2035 
2036 	return 0;
2037 }
2038 
2039 static void at76_bss_info_changed(struct ieee80211_hw *hw,
2040 				  struct ieee80211_vif *vif,
2041 				  struct ieee80211_bss_conf *conf,
2042 				  u32 changed)
2043 {
2044 	struct at76_priv *priv = hw->priv;
2045 
2046 	at76_dbg(DBG_MAC80211, "%s():", __func__);
2047 
2048 	if (!(changed & BSS_CHANGED_BSSID))
2049 		return;
2050 
2051 	at76_dbg_dump(DBG_MAC80211, conf->bssid, ETH_ALEN, "bssid:");
2052 
2053 	mutex_lock(&priv->mtx);
2054 
2055 	memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2056 
2057 	if (is_valid_ether_addr(priv->bssid))
2058 		/* mac80211 is joining a bss */
2059 		at76_join(priv);
2060 
2061 	mutex_unlock(&priv->mtx);
2062 }
2063 
2064 /* must be atomic */
2065 static void at76_configure_filter(struct ieee80211_hw *hw,
2066 				  unsigned int changed_flags,
2067 				  unsigned int *total_flags, u64 multicast)
2068 {
2069 	struct at76_priv *priv = hw->priv;
2070 	int flags;
2071 
2072 	at76_dbg(DBG_MAC80211, "%s(): changed_flags=0x%08x "
2073 		 "total_flags=0x%08x",
2074 		 __func__, changed_flags, *total_flags);
2075 
2076 	flags = changed_flags & AT76_SUPPORTED_FILTERS;
2077 	*total_flags = AT76_SUPPORTED_FILTERS;
2078 
2079 	/* Bail out after updating flags to prevent a WARN_ON in mac80211. */
2080 	if (priv->device_unplugged)
2081 		return;
2082 
2083 	/* FIXME: access to priv->promisc should be protected with
2084 	 * priv->mtx, but it's impossible because this function needs to be
2085 	 * atomic */
2086 
2087 	if (flags && !priv->promisc) {
2088 		/* mac80211 wants us to enable promiscuous mode */
2089 		priv->promisc = 1;
2090 	} else if (!flags && priv->promisc) {
2091 		/* we need to disable promiscuous mode */
2092 		priv->promisc = 0;
2093 	} else
2094 		return;
2095 
2096 	ieee80211_queue_work(hw, &priv->work_set_promisc);
2097 }
2098 
2099 static int at76_set_wep(struct at76_priv *priv)
2100 {
2101 	int ret = 0;
2102 	struct mib_mac_wep *mib_data = &priv->mib_buf.data.wep_mib;
2103 
2104 	priv->mib_buf.type = MIB_MAC_WEP;
2105 	priv->mib_buf.size = sizeof(struct mib_mac_wep);
2106 	priv->mib_buf.index = 0;
2107 
2108 	memset(mib_data, 0, sizeof(*mib_data));
2109 
2110 	if (priv->wep_enabled) {
2111 		if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
2112 			mib_data->encryption_level = 2;
2113 		else
2114 			mib_data->encryption_level = 1;
2115 
2116 		/* always exclude unencrypted if WEP is active */
2117 		mib_data->exclude_unencrypted = 1;
2118 	} else {
2119 		mib_data->exclude_unencrypted = 0;
2120 		mib_data->encryption_level = 0;
2121 	}
2122 
2123 	mib_data->privacy_invoked = priv->wep_enabled;
2124 	mib_data->wep_default_key_id = priv->wep_key_id;
2125 	memcpy(mib_data->wep_default_keyvalue, priv->wep_keys,
2126 	       sizeof(priv->wep_keys));
2127 
2128 	ret = at76_set_mib(priv, &priv->mib_buf);
2129 
2130 	if (ret < 0)
2131 		wiphy_err(priv->hw->wiphy,
2132 			  "set_mib (wep) failed: %d\n", ret);
2133 
2134 	return ret;
2135 }
2136 
2137 static int at76_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2138 			struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2139 			struct ieee80211_key_conf *key)
2140 {
2141 	struct at76_priv *priv = hw->priv;
2142 
2143 	int i;
2144 
2145 	at76_dbg(DBG_MAC80211, "%s(): cmd %d key->cipher %d key->keyidx %d "
2146 		 "key->keylen %d",
2147 		 __func__, cmd, key->cipher, key->keyidx, key->keylen);
2148 
2149 	if ((key->cipher != WLAN_CIPHER_SUITE_WEP40) &&
2150 	    (key->cipher != WLAN_CIPHER_SUITE_WEP104))
2151 		return -EOPNOTSUPP;
2152 
2153 	key->hw_key_idx = key->keyidx;
2154 
2155 	mutex_lock(&priv->mtx);
2156 
2157 	switch (cmd) {
2158 	case SET_KEY:
2159 		memcpy(priv->wep_keys[key->keyidx], key->key, key->keylen);
2160 		priv->wep_keys_len[key->keyidx] = key->keylen;
2161 
2162 		/* FIXME: find out how to do this properly */
2163 		priv->wep_key_id = key->keyidx;
2164 
2165 		break;
2166 	case DISABLE_KEY:
2167 	default:
2168 		priv->wep_keys_len[key->keyidx] = 0;
2169 		break;
2170 	}
2171 
2172 	priv->wep_enabled = 0;
2173 
2174 	for (i = 0; i < WEP_KEYS; i++) {
2175 		if (priv->wep_keys_len[i] != 0)
2176 			priv->wep_enabled = 1;
2177 	}
2178 
2179 	at76_set_wep(priv);
2180 
2181 	mutex_unlock(&priv->mtx);
2182 
2183 	return 0;
2184 }
2185 
2186 static const struct ieee80211_ops at76_ops = {
2187 	.tx = at76_mac80211_tx,
2188 	.add_interface = at76_add_interface,
2189 	.remove_interface = at76_remove_interface,
2190 	.config = at76_config,
2191 	.bss_info_changed = at76_bss_info_changed,
2192 	.configure_filter = at76_configure_filter,
2193 	.start = at76_mac80211_start,
2194 	.stop = at76_mac80211_stop,
2195 	.hw_scan = at76_hw_scan,
2196 	.set_key = at76_set_key,
2197 };
2198 
2199 /* Allocate network device and initialize private data */
2200 static struct at76_priv *at76_alloc_new_device(struct usb_device *udev)
2201 {
2202 	struct ieee80211_hw *hw;
2203 	struct at76_priv *priv;
2204 
2205 	hw = ieee80211_alloc_hw(sizeof(struct at76_priv), &at76_ops);
2206 	if (!hw) {
2207 		printk(KERN_ERR DRIVER_NAME ": could not register"
2208 		       " ieee80211_hw\n");
2209 		return NULL;
2210 	}
2211 
2212 	priv = hw->priv;
2213 	priv->hw = hw;
2214 
2215 	priv->udev = udev;
2216 
2217 	mutex_init(&priv->mtx);
2218 	INIT_WORK(&priv->work_set_promisc, at76_work_set_promisc);
2219 	INIT_WORK(&priv->work_submit_rx, at76_work_submit_rx);
2220 	INIT_WORK(&priv->work_join_bssid, at76_work_join_bssid);
2221 	INIT_DELAYED_WORK(&priv->dwork_hw_scan, at76_dwork_hw_scan);
2222 
2223 	tasklet_init(&priv->rx_tasklet, at76_rx_tasklet, 0);
2224 
2225 	priv->pm_mode = AT76_PM_OFF;
2226 	priv->pm_period = 0;
2227 
2228 	/* unit us */
2229 
2230 	return priv;
2231 }
2232 
2233 static int at76_alloc_urbs(struct at76_priv *priv,
2234 			   struct usb_interface *interface)
2235 {
2236 	struct usb_endpoint_descriptor *endpoint, *ep_in, *ep_out;
2237 	int i;
2238 	int buffer_size;
2239 	struct usb_host_interface *iface_desc;
2240 
2241 	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
2242 
2243 	at76_dbg(DBG_URB, "%s: NumEndpoints %d ", __func__,
2244 		 interface->altsetting[0].desc.bNumEndpoints);
2245 
2246 	ep_in = NULL;
2247 	ep_out = NULL;
2248 	iface_desc = interface->cur_altsetting;
2249 	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
2250 		endpoint = &iface_desc->endpoint[i].desc;
2251 
2252 		at76_dbg(DBG_URB, "%s: %d. endpoint: addr 0x%x attr 0x%x",
2253 			 __func__, i, endpoint->bEndpointAddress,
2254 			 endpoint->bmAttributes);
2255 
2256 		if (!ep_in && usb_endpoint_is_bulk_in(endpoint))
2257 			ep_in = endpoint;
2258 
2259 		if (!ep_out && usb_endpoint_is_bulk_out(endpoint))
2260 			ep_out = endpoint;
2261 	}
2262 
2263 	if (!ep_in || !ep_out) {
2264 		dev_err(&interface->dev, "bulk endpoints missing\n");
2265 		return -ENXIO;
2266 	}
2267 
2268 	priv->rx_pipe = usb_rcvbulkpipe(priv->udev, ep_in->bEndpointAddress);
2269 	priv->tx_pipe = usb_sndbulkpipe(priv->udev, ep_out->bEndpointAddress);
2270 
2271 	priv->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2272 	priv->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2273 	if (!priv->rx_urb || !priv->tx_urb) {
2274 		dev_err(&interface->dev, "cannot allocate URB\n");
2275 		return -ENOMEM;
2276 	}
2277 
2278 	buffer_size = sizeof(struct at76_tx_buffer) + MAX_PADDING_SIZE;
2279 	priv->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
2280 	if (!priv->bulk_out_buffer)
2281 		return -ENOMEM;
2282 
2283 	at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
2284 
2285 	return 0;
2286 }
2287 
2288 static struct ieee80211_rate at76_rates[] = {
2289 	{ .bitrate = 10, .hw_value = TX_RATE_1MBIT, },
2290 	{ .bitrate = 20, .hw_value = TX_RATE_2MBIT, },
2291 	{ .bitrate = 55, .hw_value = TX_RATE_5_5MBIT, },
2292 	{ .bitrate = 110, .hw_value = TX_RATE_11MBIT, },
2293 };
2294 
2295 static struct ieee80211_channel at76_channels[] = {
2296 	{ .center_freq = 2412, .hw_value = 1 },
2297 	{ .center_freq = 2417, .hw_value = 2 },
2298 	{ .center_freq = 2422, .hw_value = 3 },
2299 	{ .center_freq = 2427, .hw_value = 4 },
2300 	{ .center_freq = 2432, .hw_value = 5 },
2301 	{ .center_freq = 2437, .hw_value = 6 },
2302 	{ .center_freq = 2442, .hw_value = 7 },
2303 	{ .center_freq = 2447, .hw_value = 8 },
2304 	{ .center_freq = 2452, .hw_value = 9 },
2305 	{ .center_freq = 2457, .hw_value = 10 },
2306 	{ .center_freq = 2462, .hw_value = 11 },
2307 	{ .center_freq = 2467, .hw_value = 12 },
2308 	{ .center_freq = 2472, .hw_value = 13 },
2309 	{ .center_freq = 2484, .hw_value = 14 }
2310 };
2311 
2312 static struct ieee80211_supported_band at76_supported_band = {
2313 	.channels = at76_channels,
2314 	.n_channels = ARRAY_SIZE(at76_channels),
2315 	.bitrates = at76_rates,
2316 	.n_bitrates = ARRAY_SIZE(at76_rates),
2317 };
2318 
2319 /* Register network device and initialize the hardware */
2320 static int at76_init_new_device(struct at76_priv *priv,
2321 				struct usb_interface *interface)
2322 {
2323 	struct wiphy *wiphy;
2324 	size_t len;
2325 	int ret;
2326 
2327 	/* set up the endpoint information */
2328 	/* check out the endpoints */
2329 
2330 	at76_dbg(DBG_DEVSTART, "USB interface: %d endpoints",
2331 		 interface->cur_altsetting->desc.bNumEndpoints);
2332 
2333 	ret = at76_alloc_urbs(priv, interface);
2334 	if (ret < 0)
2335 		goto exit;
2336 
2337 	/* MAC address */
2338 	ret = at76_get_hw_config(priv);
2339 	if (ret < 0) {
2340 		dev_err(&interface->dev, "cannot get MAC address\n");
2341 		goto exit;
2342 	}
2343 
2344 	priv->domain = at76_get_reg_domain(priv->regulatory_domain);
2345 
2346 	priv->channel = DEF_CHANNEL;
2347 	priv->iw_mode = IW_MODE_INFRA;
2348 	priv->rts_threshold = DEF_RTS_THRESHOLD;
2349 	priv->frag_threshold = DEF_FRAG_THRESHOLD;
2350 	priv->short_retry_limit = DEF_SHORT_RETRY_LIMIT;
2351 	priv->txrate = TX_RATE_AUTO;
2352 	priv->preamble_type = PREAMBLE_TYPE_LONG;
2353 	priv->beacon_period = 100;
2354 	priv->auth_mode = WLAN_AUTH_OPEN;
2355 	priv->scan_min_time = DEF_SCAN_MIN_TIME;
2356 	priv->scan_max_time = DEF_SCAN_MAX_TIME;
2357 	priv->scan_mode = SCAN_TYPE_ACTIVE;
2358 	priv->device_unplugged = 0;
2359 
2360 	/* mac80211 initialisation */
2361 	wiphy = priv->hw->wiphy;
2362 	priv->hw->wiphy->max_scan_ssids = 1;
2363 	priv->hw->wiphy->max_scan_ie_len = 0;
2364 	priv->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
2365 	priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = &at76_supported_band;
2366 	ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
2367 	ieee80211_hw_set(priv->hw, SIGNAL_UNSPEC);
2368 	priv->hw->max_signal = 100;
2369 
2370 	SET_IEEE80211_DEV(priv->hw, &interface->dev);
2371 	SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2372 
2373 	len = sizeof(wiphy->fw_version);
2374 	snprintf(wiphy->fw_version, len, "%d.%d.%d-%d",
2375 		 priv->fw_version.major, priv->fw_version.minor,
2376 		 priv->fw_version.patch, priv->fw_version.build);
2377 
2378 	wiphy->hw_version = priv->board_type;
2379 
2380 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2381 
2382 	ret = ieee80211_register_hw(priv->hw);
2383 	if (ret) {
2384 		printk(KERN_ERR "cannot register mac80211 hw (status %d)!\n",
2385 		       ret);
2386 		goto exit;
2387 	}
2388 
2389 	priv->mac80211_registered = 1;
2390 
2391 	wiphy_info(priv->hw->wiphy, "USB %s, MAC %pM, firmware %d.%d.%d-%d\n",
2392 		   dev_name(&interface->dev), priv->mac_addr,
2393 		   priv->fw_version.major, priv->fw_version.minor,
2394 		   priv->fw_version.patch, priv->fw_version.build);
2395 	wiphy_info(priv->hw->wiphy, "regulatory domain 0x%02x: %s\n",
2396 		   priv->regulatory_domain, priv->domain->name);
2397 
2398 exit:
2399 	return ret;
2400 }
2401 
2402 static void at76_delete_device(struct at76_priv *priv)
2403 {
2404 	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
2405 
2406 	/* The device is gone, don't bother turning it off */
2407 	priv->device_unplugged = 1;
2408 
2409 	tasklet_kill(&priv->rx_tasklet);
2410 
2411 	if (priv->mac80211_registered)
2412 		ieee80211_unregister_hw(priv->hw);
2413 
2414 	if (priv->tx_urb) {
2415 		usb_kill_urb(priv->tx_urb);
2416 		usb_free_urb(priv->tx_urb);
2417 	}
2418 	if (priv->rx_urb) {
2419 		usb_kill_urb(priv->rx_urb);
2420 		usb_free_urb(priv->rx_urb);
2421 	}
2422 
2423 	at76_dbg(DBG_PROC_ENTRY, "%s: unlinked urbs", __func__);
2424 
2425 	kfree(priv->bulk_out_buffer);
2426 
2427 	del_timer_sync(&ledtrig_tx_timer);
2428 
2429 	kfree_skb(priv->rx_skb);
2430 
2431 	at76_dbg(DBG_PROC_ENTRY, "%s: before freeing priv/ieee80211_hw",
2432 		 __func__);
2433 	ieee80211_free_hw(priv->hw);
2434 
2435 	at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
2436 }
2437 
2438 static int at76_probe(struct usb_interface *interface,
2439 		      const struct usb_device_id *id)
2440 {
2441 	int ret;
2442 	struct at76_priv *priv;
2443 	struct fwentry *fwe;
2444 	struct usb_device *udev;
2445 	int op_mode;
2446 	int need_ext_fw = 0;
2447 	struct mib_fw_version *fwv = NULL;
2448 	int board_type = (int)id->driver_info;
2449 
2450 	udev = usb_get_dev(interface_to_usbdev(interface));
2451 
2452 	fwv = kmalloc(sizeof(*fwv), GFP_KERNEL);
2453 	if (!fwv) {
2454 		ret = -ENOMEM;
2455 		goto exit;
2456 	}
2457 
2458 	/* Load firmware into kernel memory */
2459 	fwe = at76_load_firmware(udev, board_type);
2460 	if (!fwe) {
2461 		ret = -ENOENT;
2462 		goto exit;
2463 	}
2464 
2465 	op_mode = at76_get_op_mode(udev);
2466 
2467 	at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
2468 
2469 	/* we get OPMODE_NONE with 2.4.23, SMC2662W-AR ???
2470 	   we get 204 with 2.4.23, Fiberline FL-WL240u (505A+RFMD2958) ??? */
2471 
2472 	if (op_mode == OPMODE_HW_CONFIG_MODE) {
2473 		dev_err(&interface->dev,
2474 			"cannot handle a device in HW_CONFIG_MODE\n");
2475 		ret = -EBUSY;
2476 		goto exit;
2477 	}
2478 
2479 	if (op_mode != OPMODE_NORMAL_NIC_WITH_FLASH
2480 	    && op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
2481 		/* download internal firmware part */
2482 		dev_printk(KERN_DEBUG, &interface->dev,
2483 			   "downloading internal firmware\n");
2484 		ret = at76_load_internal_fw(udev, fwe);
2485 		if (ret < 0) {
2486 			dev_err(&interface->dev,
2487 				"error %d downloading internal firmware\n",
2488 				ret);
2489 		}
2490 		goto exit;
2491 	}
2492 
2493 	/* Internal firmware already inside the device.  Get firmware
2494 	 * version to test if external firmware is loaded.
2495 	 * This works only for newer firmware, e.g. the Intersil 0.90.x
2496 	 * says "control timeout on ep0in" and subsequent
2497 	 * at76_get_op_mode() fail too :-( */
2498 
2499 	/* if version >= 0.100.x.y or device with built-in flash we can
2500 	 * query the device for the fw version */
2501 	if ((fwe->fw_version.major > 0 || fwe->fw_version.minor >= 100)
2502 	    || (op_mode == OPMODE_NORMAL_NIC_WITH_FLASH)) {
2503 		ret = at76_get_mib(udev, MIB_FW_VERSION, fwv, sizeof(*fwv));
2504 		if (ret < 0 || (fwv->major | fwv->minor) == 0)
2505 			need_ext_fw = 1;
2506 	} else
2507 		/* No way to check firmware version, reload to be sure */
2508 		need_ext_fw = 1;
2509 
2510 	if (need_ext_fw) {
2511 		dev_printk(KERN_DEBUG, &interface->dev,
2512 			   "downloading external firmware\n");
2513 
2514 		ret = at76_load_external_fw(udev, fwe);
2515 		if (ret < 0)
2516 			goto exit;
2517 
2518 		/* Re-check firmware version */
2519 		ret = at76_get_mib(udev, MIB_FW_VERSION, fwv, sizeof(*fwv));
2520 		if (ret < 0) {
2521 			dev_err(&interface->dev,
2522 				"error %d getting firmware version\n", ret);
2523 			goto exit;
2524 		}
2525 	}
2526 
2527 	priv = at76_alloc_new_device(udev);
2528 	if (!priv) {
2529 		ret = -ENOMEM;
2530 		goto exit;
2531 	}
2532 
2533 	usb_set_intfdata(interface, priv);
2534 
2535 	memcpy(&priv->fw_version, fwv, sizeof(struct mib_fw_version));
2536 	priv->board_type = board_type;
2537 
2538 	ret = at76_init_new_device(priv, interface);
2539 	if (ret < 0)
2540 		at76_delete_device(priv);
2541 
2542 exit:
2543 	kfree(fwv);
2544 	if (ret < 0)
2545 		usb_put_dev(udev);
2546 	return ret;
2547 }
2548 
2549 static void at76_disconnect(struct usb_interface *interface)
2550 {
2551 	struct at76_priv *priv;
2552 
2553 	priv = usb_get_intfdata(interface);
2554 	usb_set_intfdata(interface, NULL);
2555 
2556 	/* Disconnect after loading internal firmware */
2557 	if (!priv)
2558 		return;
2559 
2560 	wiphy_info(priv->hw->wiphy, "disconnecting\n");
2561 	at76_delete_device(priv);
2562 	usb_put_dev(priv->udev);
2563 	dev_info(&interface->dev, "disconnected\n");
2564 }
2565 
2566 /* Structure for registering this driver with the USB subsystem */
2567 static struct usb_driver at76_driver = {
2568 	.name = DRIVER_NAME,
2569 	.probe = at76_probe,
2570 	.disconnect = at76_disconnect,
2571 	.id_table = dev_table,
2572 	.disable_hub_initiated_lpm = 1,
2573 };
2574 
2575 static int __init at76_mod_init(void)
2576 {
2577 	int result;
2578 
2579 	printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " loading\n");
2580 
2581 	mutex_init(&fw_mutex);
2582 
2583 	/* register this driver with the USB subsystem */
2584 	result = usb_register(&at76_driver);
2585 	if (result < 0)
2586 		printk(KERN_ERR DRIVER_NAME
2587 		       ": usb_register failed (status %d)\n", result);
2588 
2589 	led_trigger_register_simple("at76_usb-tx", &ledtrig_tx);
2590 	return result;
2591 }
2592 
2593 static void __exit at76_mod_exit(void)
2594 {
2595 	int i;
2596 
2597 	printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " unloading\n");
2598 	usb_deregister(&at76_driver);
2599 	for (i = 0; i < ARRAY_SIZE(firmwares); i++)
2600 		release_firmware(firmwares[i].fw);
2601 	led_trigger_unregister_simple(ledtrig_tx);
2602 }
2603 
2604 module_param_named(debug, at76_debug, uint, 0600);
2605 MODULE_PARM_DESC(debug, "Debugging level");
2606 
2607 module_init(at76_mod_init);
2608 module_exit(at76_mod_exit);
2609 
2610 MODULE_AUTHOR("Oliver Kurth <oku@masqmail.cx>");
2611 MODULE_AUTHOR("Joerg Albert <joerg.albert@gmx.de>");
2612 MODULE_AUTHOR("Alex <alex@foogod.com>");
2613 MODULE_AUTHOR("Nick Jones");
2614 MODULE_AUTHOR("Balint Seeber <n0_5p4m_p13453@hotmail.com>");
2615 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
2616 MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>");
2617 MODULE_AUTHOR("Kalle Valo <kalle.valo@iki.fi>");
2618 MODULE_AUTHOR("Sebastian Smolorz <sesmo@gmx.net>");
2619 MODULE_DESCRIPTION(DRIVER_DESC);
2620 MODULE_LICENSE("GPL");
2621