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 <joerg.albert@gmx.de>
7  * Copyright (c) 2004 Nick Jones
8  * Copyright (c) 2004 Balint Seeber <n0_5p4m_p13453@hotmail.com>
9  * Copyright (c) 2007 Guido Guenther <agx@sigxcpu.org>
10  * Copyright (c) 2007 Kalle Valo <kalle.valo@iki.fi>
11  * Copyright (c) 2010 Sebastian Smolorz <sesmo@gmx.net>
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 DEFINE_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 
at76_is_intersil(enum board_type board)303 static inline int at76_is_intersil(enum board_type board)
304 {
305 	return (board == BOARD_503_ISL3861 || board == BOARD_503_ISL3863);
306 }
307 
at76_is_503rfmd(enum board_type board)308 static inline int at76_is_503rfmd(enum board_type board)
309 {
310 	return (board == BOARD_503 || board == BOARD_503_ACC);
311 }
312 
at76_is_505a(enum board_type board)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 */
at76_load_int_fw_block(struct usb_device * udev,int blockno,void * block,int size)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 
at76_dfu_get_status(struct usb_device * udev,struct dfu_status * status)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 
at76_dfu_get_state(struct usb_device * udev,u8 * state)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 */
at76_get_timeout(struct dfu_status * s)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.  */
at76_usbdfu_download(struct usb_device * udev,u8 * buf,u32 size,int manifest_sync_timeout)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 			fallthrough;
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 
at76_ledtrig_tx_timerfunc(struct timer_list * unused)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 
at76_ledtrig_tx_activity(void)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 
at76_remap(struct usb_device * udev)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 
at76_get_op_mode(struct usb_device * udev)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 */
at76_load_ext_fw_block(struct usb_device * udev,int blockno,void * block,int size)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 
at76_get_hw_cfg(struct usb_device * udev,union at76_hwcfg * buf,int buf_size)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 */
at76_get_hw_cfg_intersil(struct usb_device * udev,union at76_hwcfg * buf,int buf_size)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) */
at76_get_hw_config(struct at76_priv * priv)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 
at76_get_reg_domain(u16 code)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 
at76_get_mib(struct usb_device * udev,u16 mib,void * buf,int buf_size)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 */
at76_get_cmd_status(struct usb_device * udev,u8 cmd)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
at76_get_cmd_string(u8 cmd_status)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 
at76_set_card_command(struct usb_device * udev,u8 cmd,void * buf,int buf_size)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
at76_get_cmd_status_string(u8 cmd_status)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 */
at76_wait_completion(struct at76_priv * priv,int cmd)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 
at76_set_mib(struct at76_priv * priv,struct set_mib_buffer * buf)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 */
at76_set_radio(struct at76_priv * priv,int enable)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) */
at76_set_pm_mode(struct at76_priv * priv)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 
at76_set_preamble(struct at76_priv * priv,u8 type)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 
at76_set_frag(struct at76_priv * priv,u16 size)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 
at76_set_rts(struct at76_priv * priv,u16 size)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 
at76_set_autorate_fallback(struct at76_priv * priv,int onoff)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 
at76_dump_mib_mac_addr(struct at76_priv * priv)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 
at76_dump_mib_mac_wep(struct at76_priv * priv)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 
at76_dump_mib_mac_mgmt(struct at76_priv * priv)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 
at76_dump_mib_mac(struct at76_priv * priv)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 
at76_dump_mib_phy(struct at76_priv * priv)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 
at76_dump_mib_local(struct at76_priv * priv)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 
at76_dump_mib_mdomain(struct at76_priv * priv)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 */
at76_start_monitor(struct at76_priv * priv)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 ... */
at76_calc_padding(int wlen)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 
at76_rx_callback(struct urb * urb)1198 static void at76_rx_callback(struct urb *urb)
1199 {
1200 	struct at76_priv *priv = urb->context;
1201 
1202 	tasklet_schedule(&priv->rx_tasklet);
1203 }
1204 
at76_submit_rx_urb(struct at76_priv * priv)1205 static int at76_submit_rx_urb(struct at76_priv *priv)
1206 {
1207 	int ret;
1208 	int size;
1209 	struct sk_buff *skb = priv->rx_skb;
1210 
1211 	if (!priv->rx_urb) {
1212 		wiphy_err(priv->hw->wiphy, "%s: priv->rx_urb is NULL\n",
1213 			  __func__);
1214 		return -EFAULT;
1215 	}
1216 
1217 	if (!skb) {
1218 		skb = dev_alloc_skb(sizeof(struct at76_rx_buffer));
1219 		if (!skb) {
1220 			wiphy_err(priv->hw->wiphy,
1221 				  "cannot allocate rx skbuff\n");
1222 			ret = -ENOMEM;
1223 			goto exit;
1224 		}
1225 		priv->rx_skb = skb;
1226 	} else {
1227 		skb_push(skb, skb_headroom(skb));
1228 		skb_trim(skb, 0);
1229 	}
1230 
1231 	size = skb_tailroom(skb);
1232 	usb_fill_bulk_urb(priv->rx_urb, priv->udev, priv->rx_pipe,
1233 			  skb_put(skb, size), size, at76_rx_callback, priv);
1234 	ret = usb_submit_urb(priv->rx_urb, GFP_ATOMIC);
1235 	if (ret < 0) {
1236 		if (ret == -ENODEV)
1237 			at76_dbg(DBG_DEVSTART,
1238 				 "usb_submit_urb returned -ENODEV");
1239 		else
1240 			wiphy_err(priv->hw->wiphy,
1241 				  "rx, usb_submit_urb failed: %d\n", ret);
1242 	}
1243 
1244 exit:
1245 	if (ret < 0 && ret != -ENODEV)
1246 		wiphy_err(priv->hw->wiphy,
1247 			  "cannot submit rx urb - please unload the driver and/or power cycle the device\n");
1248 
1249 	return ret;
1250 }
1251 
1252 /* Download external firmware */
at76_load_external_fw(struct usb_device * udev,struct fwentry * fwe)1253 static int at76_load_external_fw(struct usb_device *udev, struct fwentry *fwe)
1254 {
1255 	int ret;
1256 	int op_mode;
1257 	int blockno = 0;
1258 	int bsize;
1259 	u8 *block;
1260 	u8 *buf = fwe->extfw;
1261 	int size = fwe->extfw_size;
1262 
1263 	if (!buf || !size)
1264 		return -ENOENT;
1265 
1266 	op_mode = at76_get_op_mode(udev);
1267 	at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
1268 
1269 	if (op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
1270 		dev_err(&udev->dev, "unexpected opmode %d\n", op_mode);
1271 		return -EINVAL;
1272 	}
1273 
1274 	block = kmalloc(FW_BLOCK_SIZE, GFP_KERNEL);
1275 	if (!block)
1276 		return -ENOMEM;
1277 
1278 	at76_dbg(DBG_DEVSTART, "downloading external firmware");
1279 
1280 	/* for fw >= 0.100, the device needs an extra empty block */
1281 	do {
1282 		bsize = min_t(int, size, FW_BLOCK_SIZE);
1283 		memcpy(block, buf, bsize);
1284 		at76_dbg(DBG_DEVSTART,
1285 			 "ext fw, size left = %5d, bsize = %4d, blockno = %2d",
1286 			 size, bsize, blockno);
1287 		ret = at76_load_ext_fw_block(udev, blockno, block, bsize);
1288 		if (ret != bsize) {
1289 			dev_err(&udev->dev,
1290 				"loading %dth firmware block failed: %d\n",
1291 				blockno, ret);
1292 			ret = -EIO;
1293 			goto exit;
1294 		}
1295 		buf += bsize;
1296 		size -= bsize;
1297 		blockno++;
1298 	} while (bsize > 0);
1299 
1300 	if (at76_is_505a(fwe->board_type)) {
1301 		at76_dbg(DBG_DEVSTART, "200 ms delay for 505a");
1302 		schedule_timeout_interruptible(HZ / 5 + 1);
1303 	}
1304 
1305 exit:
1306 	kfree(block);
1307 	if (ret < 0)
1308 		dev_err(&udev->dev,
1309 			"downloading external firmware failed: %d\n", ret);
1310 	return ret;
1311 }
1312 
1313 /* Download internal firmware */
at76_load_internal_fw(struct usb_device * udev,struct fwentry * fwe)1314 static int at76_load_internal_fw(struct usb_device *udev, struct fwentry *fwe)
1315 {
1316 	int ret;
1317 	int need_remap = !at76_is_505a(fwe->board_type);
1318 
1319 	ret = at76_usbdfu_download(udev, fwe->intfw, fwe->intfw_size,
1320 				   need_remap ? 0 : 2 * HZ);
1321 
1322 	if (ret < 0) {
1323 		dev_err(&udev->dev,
1324 			"downloading internal fw failed with %d\n", ret);
1325 		goto exit;
1326 	}
1327 
1328 	at76_dbg(DBG_DEVSTART, "sending REMAP");
1329 
1330 	/* no REMAP for 505A (see SF driver) */
1331 	if (need_remap) {
1332 		ret = at76_remap(udev);
1333 		if (ret < 0) {
1334 			dev_err(&udev->dev,
1335 				"sending REMAP failed with %d\n", ret);
1336 			goto exit;
1337 		}
1338 	}
1339 
1340 	at76_dbg(DBG_DEVSTART, "sleeping for 2 seconds");
1341 	schedule_timeout_interruptible(2 * HZ + 1);
1342 	usb_reset_device(udev);
1343 
1344 exit:
1345 	return ret;
1346 }
1347 
at76_startup_device(struct at76_priv * priv)1348 static int at76_startup_device(struct at76_priv *priv)
1349 {
1350 	struct at76_card_config *ccfg = &priv->card_config;
1351 	int ret;
1352 
1353 	at76_dbg(DBG_PARAMS,
1354 		 "%s param: ssid %.*s (%*phD) mode %s ch %d wep %s key %d "
1355 		 "keylen %d", wiphy_name(priv->hw->wiphy), priv->essid_size,
1356 		 priv->essid, IW_ESSID_MAX_SIZE, priv->essid,
1357 		 priv->iw_mode == IW_MODE_ADHOC ? "adhoc" : "infra",
1358 		 priv->channel, priv->wep_enabled ? "enabled" : "disabled",
1359 		 priv->wep_key_id, priv->wep_keys_len[priv->wep_key_id]);
1360 	at76_dbg(DBG_PARAMS,
1361 		 "%s param: preamble %s rts %d retry %d frag %d "
1362 		 "txrate %s auth_mode %d", wiphy_name(priv->hw->wiphy),
1363 		 preambles[priv->preamble_type], priv->rts_threshold,
1364 		 priv->short_retry_limit, priv->frag_threshold,
1365 		 priv->txrate == TX_RATE_1MBIT ? "1MBit" : priv->txrate ==
1366 		 TX_RATE_2MBIT ? "2MBit" : priv->txrate ==
1367 		 TX_RATE_5_5MBIT ? "5.5MBit" : priv->txrate ==
1368 		 TX_RATE_11MBIT ? "11MBit" : priv->txrate ==
1369 		 TX_RATE_AUTO ? "auto" : "<invalid>", priv->auth_mode);
1370 	at76_dbg(DBG_PARAMS,
1371 		 "%s param: pm_mode %d pm_period %d auth_mode %s "
1372 		 "scan_times %d %d scan_mode %s",
1373 		 wiphy_name(priv->hw->wiphy), priv->pm_mode, priv->pm_period,
1374 		 priv->auth_mode == WLAN_AUTH_OPEN ? "open" : "shared_secret",
1375 		 priv->scan_min_time, priv->scan_max_time,
1376 		 priv->scan_mode == SCAN_TYPE_ACTIVE ? "active" : "passive");
1377 
1378 	memset(ccfg, 0, sizeof(struct at76_card_config));
1379 	ccfg->promiscuous_mode = 0;
1380 	ccfg->short_retry_limit = priv->short_retry_limit;
1381 
1382 	if (priv->wep_enabled) {
1383 		if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
1384 			ccfg->encryption_type = 2;
1385 		else
1386 			ccfg->encryption_type = 1;
1387 
1388 		/* jal: always exclude unencrypted if WEP is active */
1389 		ccfg->exclude_unencrypted = 1;
1390 	} else {
1391 		ccfg->exclude_unencrypted = 0;
1392 		ccfg->encryption_type = 0;
1393 	}
1394 
1395 	ccfg->rts_threshold = cpu_to_le16(priv->rts_threshold);
1396 	ccfg->fragmentation_threshold = cpu_to_le16(priv->frag_threshold);
1397 
1398 	memcpy(ccfg->basic_rate_set, hw_rates, 4);
1399 	/* jal: really needed, we do a set_mib for autorate later ??? */
1400 	ccfg->auto_rate_fallback = (priv->txrate == TX_RATE_AUTO ? 1 : 0);
1401 	ccfg->channel = priv->channel;
1402 	ccfg->privacy_invoked = priv->wep_enabled;
1403 	memcpy(ccfg->current_ssid, priv->essid, IW_ESSID_MAX_SIZE);
1404 	ccfg->ssid_len = priv->essid_size;
1405 
1406 	ccfg->wep_default_key_id = priv->wep_key_id;
1407 	memcpy(ccfg->wep_default_key_value, priv->wep_keys,
1408 	       sizeof(priv->wep_keys));
1409 
1410 	ccfg->short_preamble = priv->preamble_type;
1411 	ccfg->beacon_period = cpu_to_le16(priv->beacon_period);
1412 
1413 	ret = at76_set_card_command(priv->udev, CMD_STARTUP, &priv->card_config,
1414 				    sizeof(struct at76_card_config));
1415 	if (ret < 0) {
1416 		wiphy_err(priv->hw->wiphy, "at76_set_card_command failed: %d\n",
1417 			  ret);
1418 		return ret;
1419 	}
1420 
1421 	at76_wait_completion(priv, CMD_STARTUP);
1422 
1423 	/* remove BSSID from previous run */
1424 	eth_zero_addr(priv->bssid);
1425 
1426 	priv->scanning = false;
1427 
1428 	if (at76_set_radio(priv, 1) == 1)
1429 		at76_wait_completion(priv, CMD_RADIO_ON);
1430 
1431 	ret = at76_set_preamble(priv, priv->preamble_type);
1432 	if (ret < 0)
1433 		return ret;
1434 
1435 	ret = at76_set_frag(priv, priv->frag_threshold);
1436 	if (ret < 0)
1437 		return ret;
1438 
1439 	ret = at76_set_rts(priv, priv->rts_threshold);
1440 	if (ret < 0)
1441 		return ret;
1442 
1443 	ret = at76_set_autorate_fallback(priv,
1444 					 priv->txrate == TX_RATE_AUTO ? 1 : 0);
1445 	if (ret < 0)
1446 		return ret;
1447 
1448 	ret = at76_set_pm_mode(priv);
1449 	if (ret < 0)
1450 		return ret;
1451 
1452 	if (at76_debug & DBG_MIB) {
1453 		at76_dump_mib_mac(priv);
1454 		at76_dump_mib_mac_addr(priv);
1455 		at76_dump_mib_mac_mgmt(priv);
1456 		at76_dump_mib_mac_wep(priv);
1457 		at76_dump_mib_mdomain(priv);
1458 		at76_dump_mib_phy(priv);
1459 		at76_dump_mib_local(priv);
1460 	}
1461 
1462 	return 0;
1463 }
1464 
1465 /* Enable or disable promiscuous mode */
at76_work_set_promisc(struct work_struct * work)1466 static void at76_work_set_promisc(struct work_struct *work)
1467 {
1468 	struct at76_priv *priv = container_of(work, struct at76_priv,
1469 					      work_set_promisc);
1470 	int ret = 0;
1471 
1472 	if (priv->device_unplugged)
1473 		return;
1474 
1475 	mutex_lock(&priv->mtx);
1476 
1477 	priv->mib_buf.type = MIB_LOCAL;
1478 	priv->mib_buf.size = 1;
1479 	priv->mib_buf.index = offsetof(struct mib_local, promiscuous_mode);
1480 	priv->mib_buf.data.byte = priv->promisc ? 1 : 0;
1481 
1482 	ret = at76_set_mib(priv, &priv->mib_buf);
1483 	if (ret < 0)
1484 		wiphy_err(priv->hw->wiphy,
1485 			  "set_mib (promiscuous_mode) failed: %d\n", ret);
1486 
1487 	mutex_unlock(&priv->mtx);
1488 }
1489 
1490 /* Submit Rx urb back to the device */
at76_work_submit_rx(struct work_struct * work)1491 static void at76_work_submit_rx(struct work_struct *work)
1492 {
1493 	struct at76_priv *priv = container_of(work, struct at76_priv,
1494 					      work_submit_rx);
1495 
1496 	mutex_lock(&priv->mtx);
1497 	at76_submit_rx_urb(priv);
1498 	mutex_unlock(&priv->mtx);
1499 }
1500 
1501 /* This is a workaround to make scan working:
1502  * currently mac80211 does not process frames with no frequency
1503  * information.
1504  * However during scan the HW performs a sweep by itself, and we
1505  * are unable to know where the radio is actually tuned.
1506  * This function tries to do its best to guess this information..
1507  * During scan, If the current frame is a beacon or a probe response,
1508  * the channel information is extracted from it.
1509  * When not scanning, for other frames, or if it happens that for
1510  * whatever reason we fail to parse beacons and probe responses, this
1511  * function returns the priv->channel information, that should be correct
1512  * at least when we are not scanning.
1513  */
at76_guess_freq(struct at76_priv * priv)1514 static inline int at76_guess_freq(struct at76_priv *priv)
1515 {
1516 	size_t el_off;
1517 	const u8 *el;
1518 	int channel = priv->channel;
1519 	int len = priv->rx_skb->len;
1520 	struct ieee80211_hdr *hdr = (void *)priv->rx_skb->data;
1521 
1522 	if (!priv->scanning)
1523 		goto exit;
1524 
1525 	if (len < 24)
1526 		goto exit;
1527 
1528 	if (ieee80211_is_probe_resp(hdr->frame_control)) {
1529 		el_off = offsetof(struct ieee80211_mgmt, u.probe_resp.variable);
1530 		el = ((struct ieee80211_mgmt *)hdr)->u.probe_resp.variable;
1531 	} else if (ieee80211_is_beacon(hdr->frame_control)) {
1532 		el_off = offsetof(struct ieee80211_mgmt, u.beacon.variable);
1533 		el = ((struct ieee80211_mgmt *)hdr)->u.beacon.variable;
1534 	} else {
1535 		goto exit;
1536 	}
1537 	len -= el_off;
1538 
1539 	el = cfg80211_find_ie(WLAN_EID_DS_PARAMS, el, len);
1540 	if (el && el[1] > 0)
1541 		channel = el[2];
1542 
1543 exit:
1544 	return ieee80211_channel_to_frequency(channel, NL80211_BAND_2GHZ);
1545 }
1546 
at76_rx_tasklet(struct tasklet_struct * t)1547 static void at76_rx_tasklet(struct tasklet_struct *t)
1548 {
1549 	struct at76_priv *priv = from_tasklet(priv, t, rx_tasklet);
1550 	struct urb *urb = priv->rx_urb;
1551 	struct at76_rx_buffer *buf;
1552 	struct ieee80211_rx_status rx_status = { 0 };
1553 
1554 	if (priv->device_unplugged) {
1555 		at76_dbg(DBG_DEVSTART, "device unplugged");
1556 		at76_dbg(DBG_DEVSTART, "urb status %d", urb->status);
1557 		return;
1558 	}
1559 
1560 	if (!priv->rx_skb || !priv->rx_skb->data)
1561 		return;
1562 
1563 	buf = (struct at76_rx_buffer *)priv->rx_skb->data;
1564 
1565 	if (urb->status != 0) {
1566 		if (urb->status != -ENOENT && urb->status != -ECONNRESET)
1567 			at76_dbg(DBG_URB,
1568 				 "%s %s: - nonzero Rx bulk status received: %d",
1569 				 __func__, wiphy_name(priv->hw->wiphy),
1570 				 urb->status);
1571 		return;
1572 	}
1573 
1574 	at76_dbg(DBG_RX_ATMEL_HDR,
1575 		 "%s: rx frame: rate %d rssi %d noise %d link %d",
1576 		 wiphy_name(priv->hw->wiphy), buf->rx_rate, buf->rssi,
1577 		 buf->noise_level, buf->link_quality);
1578 
1579 	skb_pull(priv->rx_skb, AT76_RX_HDRLEN);
1580 	skb_trim(priv->rx_skb, le16_to_cpu(buf->wlength));
1581 	at76_dbg_dump(DBG_RX_DATA, priv->rx_skb->data,
1582 		      priv->rx_skb->len, "RX: len=%d", priv->rx_skb->len);
1583 
1584 	rx_status.signal = buf->rssi;
1585 	rx_status.flag |= RX_FLAG_DECRYPTED;
1586 	rx_status.flag |= RX_FLAG_IV_STRIPPED;
1587 	rx_status.band = NL80211_BAND_2GHZ;
1588 	rx_status.freq = at76_guess_freq(priv);
1589 
1590 	at76_dbg(DBG_MAC80211, "calling ieee80211_rx_irqsafe(): %d/%d",
1591 		 priv->rx_skb->len, priv->rx_skb->data_len);
1592 	memcpy(IEEE80211_SKB_RXCB(priv->rx_skb), &rx_status, sizeof(rx_status));
1593 	ieee80211_rx_irqsafe(priv->hw, priv->rx_skb);
1594 
1595 	/* Use a new skb for the next receive */
1596 	priv->rx_skb = NULL;
1597 
1598 	at76_submit_rx_urb(priv);
1599 }
1600 
1601 /* Load firmware into kernel memory and parse it */
at76_load_firmware(struct usb_device * udev,enum board_type board_type)1602 static struct fwentry *at76_load_firmware(struct usb_device *udev,
1603 					  enum board_type board_type)
1604 {
1605 	int ret;
1606 	char *str;
1607 	struct at76_fw_header *fwh;
1608 	struct fwentry *fwe = &firmwares[board_type];
1609 
1610 	mutex_lock(&fw_mutex);
1611 
1612 	if (fwe->loaded) {
1613 		at76_dbg(DBG_FW, "re-using previously loaded fw");
1614 		goto exit;
1615 	}
1616 
1617 	at76_dbg(DBG_FW, "downloading firmware %s", fwe->fwname);
1618 	ret = request_firmware(&fwe->fw, fwe->fwname, &udev->dev);
1619 	if (ret < 0) {
1620 		dev_err(&udev->dev, "firmware %s not found!\n",
1621 			fwe->fwname);
1622 		dev_err(&udev->dev,
1623 			"you may need to download the firmware from http://developer.berlios.de/projects/at76c503a/\n");
1624 		goto exit;
1625 	}
1626 
1627 	at76_dbg(DBG_FW, "got it.");
1628 	fwh = (struct at76_fw_header *)(fwe->fw->data);
1629 
1630 	if (fwe->fw->size <= sizeof(*fwh)) {
1631 		dev_err(&udev->dev,
1632 			"firmware is too short (0x%zx)\n", fwe->fw->size);
1633 		goto exit;
1634 	}
1635 
1636 	/* CRC currently not checked */
1637 	fwe->board_type = le32_to_cpu(fwh->board_type);
1638 	if (fwe->board_type != board_type) {
1639 		dev_err(&udev->dev,
1640 			"board type mismatch, requested %u, got %u\n",
1641 			board_type, fwe->board_type);
1642 		goto exit;
1643 	}
1644 
1645 	fwe->fw_version.major = fwh->major;
1646 	fwe->fw_version.minor = fwh->minor;
1647 	fwe->fw_version.patch = fwh->patch;
1648 	fwe->fw_version.build = fwh->build;
1649 
1650 	str = (char *)fwh + le32_to_cpu(fwh->str_offset);
1651 	fwe->intfw = (u8 *)fwh + le32_to_cpu(fwh->int_fw_offset);
1652 	fwe->intfw_size = le32_to_cpu(fwh->int_fw_len);
1653 	fwe->extfw = (u8 *)fwh + le32_to_cpu(fwh->ext_fw_offset);
1654 	fwe->extfw_size = le32_to_cpu(fwh->ext_fw_len);
1655 
1656 	fwe->loaded = 1;
1657 
1658 	dev_printk(KERN_DEBUG, &udev->dev,
1659 		   "using firmware %s (version %d.%d.%d-%d)\n",
1660 		   fwe->fwname, fwh->major, fwh->minor, fwh->patch, fwh->build);
1661 
1662 	at76_dbg(DBG_DEVSTART, "board %u, int %d:%d, ext %d:%d", board_type,
1663 		 le32_to_cpu(fwh->int_fw_offset), le32_to_cpu(fwh->int_fw_len),
1664 		 le32_to_cpu(fwh->ext_fw_offset), le32_to_cpu(fwh->ext_fw_len));
1665 	at76_dbg(DBG_DEVSTART, "firmware id %s", str);
1666 
1667 exit:
1668 	mutex_unlock(&fw_mutex);
1669 
1670 	if (fwe->loaded)
1671 		return fwe;
1672 	else
1673 		return NULL;
1674 }
1675 
at76_join(struct at76_priv * priv)1676 static int at76_join(struct at76_priv *priv)
1677 {
1678 	struct at76_req_join join;
1679 	int ret;
1680 
1681 	memset(&join, 0, sizeof(struct at76_req_join));
1682 	memcpy(join.essid, priv->essid, priv->essid_size);
1683 	join.essid_size = priv->essid_size;
1684 	memcpy(join.bssid, priv->bssid, ETH_ALEN);
1685 	join.bss_type = INFRASTRUCTURE_MODE;
1686 	join.channel = priv->channel;
1687 	join.timeout = cpu_to_le16(2000);
1688 
1689 	at76_dbg(DBG_MAC80211, "%s: sending CMD_JOIN", __func__);
1690 	ret = at76_set_card_command(priv->udev, CMD_JOIN, &join,
1691 				    sizeof(struct at76_req_join));
1692 
1693 	if (ret < 0) {
1694 		wiphy_err(priv->hw->wiphy, "at76_set_card_command failed: %d\n",
1695 			  ret);
1696 		return 0;
1697 	}
1698 
1699 	ret = at76_wait_completion(priv, CMD_JOIN);
1700 	at76_dbg(DBG_MAC80211, "%s: CMD_JOIN returned: 0x%02x", __func__, ret);
1701 	if (ret != CMD_STATUS_COMPLETE) {
1702 		wiphy_err(priv->hw->wiphy, "at76_wait_completion failed: %d\n",
1703 			  ret);
1704 		return 0;
1705 	}
1706 
1707 	at76_set_pm_mode(priv);
1708 
1709 	return 0;
1710 }
1711 
at76_work_join_bssid(struct work_struct * work)1712 static void at76_work_join_bssid(struct work_struct *work)
1713 {
1714 	struct at76_priv *priv = container_of(work, struct at76_priv,
1715 					      work_join_bssid);
1716 
1717 	if (priv->device_unplugged)
1718 		return;
1719 
1720 	mutex_lock(&priv->mtx);
1721 
1722 	if (is_valid_ether_addr(priv->bssid))
1723 		at76_join(priv);
1724 
1725 	mutex_unlock(&priv->mtx);
1726 }
1727 
at76_mac80211_tx_callback(struct urb * urb)1728 static void at76_mac80211_tx_callback(struct urb *urb)
1729 {
1730 	struct at76_priv *priv = urb->context;
1731 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(priv->tx_skb);
1732 
1733 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1734 
1735 	switch (urb->status) {
1736 	case 0:
1737 		/* success */
1738 		info->flags |= IEEE80211_TX_STAT_ACK;
1739 		break;
1740 	case -ENOENT:
1741 	case -ECONNRESET:
1742 		/* fail, urb has been unlinked */
1743 		/* FIXME: add error message */
1744 		break;
1745 	default:
1746 		at76_dbg(DBG_URB, "%s - nonzero tx status received: %d",
1747 			 __func__, urb->status);
1748 		break;
1749 	}
1750 
1751 	memset(&info->status, 0, sizeof(info->status));
1752 
1753 	ieee80211_tx_status_irqsafe(priv->hw, priv->tx_skb);
1754 
1755 	priv->tx_skb = NULL;
1756 
1757 	ieee80211_wake_queues(priv->hw);
1758 }
1759 
at76_mac80211_tx(struct ieee80211_hw * hw,struct ieee80211_tx_control * control,struct sk_buff * skb)1760 static void at76_mac80211_tx(struct ieee80211_hw *hw,
1761 			     struct ieee80211_tx_control *control,
1762 			     struct sk_buff *skb)
1763 {
1764 	struct at76_priv *priv = hw->priv;
1765 	struct at76_tx_buffer *tx_buffer = priv->bulk_out_buffer;
1766 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1767 	struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1768 	int padding, submit_len, ret;
1769 
1770 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1771 
1772 	if (priv->tx_urb->status == -EINPROGRESS) {
1773 		wiphy_err(priv->hw->wiphy,
1774 			  "%s called while tx urb is pending\n", __func__);
1775 		dev_kfree_skb_any(skb);
1776 		return;
1777 	}
1778 
1779 	/* The following code lines are important when the device is going to
1780 	 * authenticate with a new bssid. The driver must send CMD_JOIN before
1781 	 * an authentication frame is transmitted. For this to succeed, the
1782 	 * correct bssid of the AP must be known. As mac80211 does not inform
1783 	 * drivers about the bssid prior to the authentication process the
1784 	 * following workaround is necessary. If the TX frame is an
1785 	 * authentication frame extract the bssid and send the CMD_JOIN. */
1786 	if (mgmt->frame_control & cpu_to_le16(IEEE80211_STYPE_AUTH)) {
1787 		if (!ether_addr_equal_64bits(priv->bssid, mgmt->bssid)) {
1788 			memcpy(priv->bssid, mgmt->bssid, ETH_ALEN);
1789 			ieee80211_queue_work(hw, &priv->work_join_bssid);
1790 			dev_kfree_skb_any(skb);
1791 			return;
1792 		}
1793 	}
1794 
1795 	ieee80211_stop_queues(hw);
1796 
1797 	at76_ledtrig_tx_activity();	/* tell ledtrigger we send a packet */
1798 
1799 	WARN_ON(priv->tx_skb != NULL);
1800 
1801 	priv->tx_skb = skb;
1802 	padding = at76_calc_padding(skb->len);
1803 	submit_len = AT76_TX_HDRLEN + skb->len + padding;
1804 
1805 	/* setup 'Atmel' header */
1806 	memset(tx_buffer, 0, sizeof(*tx_buffer));
1807 	tx_buffer->padding = padding;
1808 	tx_buffer->wlength = cpu_to_le16(skb->len);
1809 	tx_buffer->tx_rate = ieee80211_get_tx_rate(hw, info)->hw_value;
1810 	memset(tx_buffer->reserved, 0, sizeof(tx_buffer->reserved));
1811 	memcpy(tx_buffer->packet, skb->data, skb->len);
1812 
1813 	at76_dbg(DBG_TX_DATA, "%s tx: wlen 0x%x pad 0x%x rate %d hdr",
1814 		 wiphy_name(priv->hw->wiphy), le16_to_cpu(tx_buffer->wlength),
1815 		 tx_buffer->padding, tx_buffer->tx_rate);
1816 
1817 	/* send stuff */
1818 	at76_dbg_dump(DBG_TX_DATA_CONTENT, tx_buffer, submit_len,
1819 		      "%s(): tx_buffer %d bytes:", __func__, submit_len);
1820 	usb_fill_bulk_urb(priv->tx_urb, priv->udev, priv->tx_pipe, tx_buffer,
1821 			  submit_len, at76_mac80211_tx_callback, priv);
1822 	ret = usb_submit_urb(priv->tx_urb, GFP_ATOMIC);
1823 	if (ret) {
1824 		wiphy_err(priv->hw->wiphy, "error in tx submit urb: %d\n", ret);
1825 		if (ret == -EINVAL)
1826 			wiphy_err(priv->hw->wiphy,
1827 				  "-EINVAL: tx urb %p hcpriv %p complete %p\n",
1828 				  priv->tx_urb,
1829 				  priv->tx_urb->hcpriv, priv->tx_urb->complete);
1830 	}
1831 }
1832 
at76_mac80211_start(struct ieee80211_hw * hw)1833 static int at76_mac80211_start(struct ieee80211_hw *hw)
1834 {
1835 	struct at76_priv *priv = hw->priv;
1836 	int ret;
1837 
1838 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1839 
1840 	mutex_lock(&priv->mtx);
1841 
1842 	ret = at76_submit_rx_urb(priv);
1843 	if (ret < 0) {
1844 		wiphy_err(priv->hw->wiphy, "open: submit_rx_urb failed: %d\n",
1845 			  ret);
1846 		goto error;
1847 	}
1848 
1849 	at76_startup_device(priv);
1850 
1851 	at76_start_monitor(priv);
1852 
1853 error:
1854 	mutex_unlock(&priv->mtx);
1855 
1856 	return 0;
1857 }
1858 
at76_mac80211_stop(struct ieee80211_hw * hw)1859 static void at76_mac80211_stop(struct ieee80211_hw *hw)
1860 {
1861 	struct at76_priv *priv = hw->priv;
1862 
1863 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1864 
1865 	cancel_delayed_work(&priv->dwork_hw_scan);
1866 	cancel_work_sync(&priv->work_join_bssid);
1867 	cancel_work_sync(&priv->work_set_promisc);
1868 
1869 	mutex_lock(&priv->mtx);
1870 
1871 	if (!priv->device_unplugged) {
1872 		/* We are called by "ifconfig ethX down", not because the
1873 		 * device is not available anymore. */
1874 		at76_set_radio(priv, 0);
1875 
1876 		/* We unlink rx_urb because at76_open() re-submits it.
1877 		 * If unplugged, at76_delete_device() takes care of it. */
1878 		usb_kill_urb(priv->rx_urb);
1879 	}
1880 
1881 	mutex_unlock(&priv->mtx);
1882 }
1883 
at76_add_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1884 static int at76_add_interface(struct ieee80211_hw *hw,
1885 			      struct ieee80211_vif *vif)
1886 {
1887 	struct at76_priv *priv = hw->priv;
1888 	int ret = 0;
1889 
1890 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1891 
1892 	mutex_lock(&priv->mtx);
1893 
1894 	switch (vif->type) {
1895 	case NL80211_IFTYPE_STATION:
1896 		priv->iw_mode = IW_MODE_INFRA;
1897 		break;
1898 	default:
1899 		ret = -EOPNOTSUPP;
1900 		goto exit;
1901 	}
1902 
1903 exit:
1904 	mutex_unlock(&priv->mtx);
1905 
1906 	return ret;
1907 }
1908 
at76_remove_interface(struct ieee80211_hw * hw,struct ieee80211_vif * vif)1909 static void at76_remove_interface(struct ieee80211_hw *hw,
1910 				  struct ieee80211_vif *vif)
1911 {
1912 	at76_dbg(DBG_MAC80211, "%s()", __func__);
1913 }
1914 
at76_dwork_hw_scan(struct work_struct * work)1915 static void at76_dwork_hw_scan(struct work_struct *work)
1916 {
1917 	struct at76_priv *priv = container_of(work, struct at76_priv,
1918 					      dwork_hw_scan.work);
1919 	struct cfg80211_scan_info info = {
1920 		.aborted = false,
1921 	};
1922 	int ret;
1923 
1924 	if (priv->device_unplugged)
1925 		return;
1926 
1927 	mutex_lock(&priv->mtx);
1928 
1929 	ret = at76_get_cmd_status(priv->udev, CMD_SCAN);
1930 	at76_dbg(DBG_MAC80211, "%s: CMD_SCAN status 0x%02x", __func__, ret);
1931 
1932 	/* FIXME: add maximum time for scan to complete */
1933 
1934 	if (ret != CMD_STATUS_COMPLETE) {
1935 		ieee80211_queue_delayed_work(priv->hw, &priv->dwork_hw_scan,
1936 					     SCAN_POLL_INTERVAL);
1937 		mutex_unlock(&priv->mtx);
1938 		return;
1939 	}
1940 
1941 	if (is_valid_ether_addr(priv->bssid))
1942 		at76_join(priv);
1943 
1944 	priv->scanning = false;
1945 
1946 	mutex_unlock(&priv->mtx);
1947 
1948 	ieee80211_scan_completed(priv->hw, &info);
1949 
1950 	ieee80211_wake_queues(priv->hw);
1951 }
1952 
at76_hw_scan(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_scan_request * hw_req)1953 static int at76_hw_scan(struct ieee80211_hw *hw,
1954 			struct ieee80211_vif *vif,
1955 			struct ieee80211_scan_request *hw_req)
1956 {
1957 	struct cfg80211_scan_request *req = &hw_req->req;
1958 	struct at76_priv *priv = hw->priv;
1959 	struct at76_req_scan scan;
1960 	u8 *ssid = NULL;
1961 	int ret, len = 0;
1962 
1963 	at76_dbg(DBG_MAC80211, "%s():", __func__);
1964 
1965 	if (priv->device_unplugged)
1966 		return 0;
1967 
1968 	mutex_lock(&priv->mtx);
1969 
1970 	ieee80211_stop_queues(hw);
1971 
1972 	memset(&scan, 0, sizeof(struct at76_req_scan));
1973 	eth_broadcast_addr(scan.bssid);
1974 
1975 	if (req->n_ssids) {
1976 		scan.scan_type = SCAN_TYPE_ACTIVE;
1977 		ssid = req->ssids[0].ssid;
1978 		len = req->ssids[0].ssid_len;
1979 	} else {
1980 		scan.scan_type = SCAN_TYPE_PASSIVE;
1981 	}
1982 
1983 	if (len) {
1984 		memcpy(scan.essid, ssid, len);
1985 		scan.essid_size = len;
1986 	}
1987 
1988 	scan.min_channel_time = cpu_to_le16(priv->scan_min_time);
1989 	scan.max_channel_time = cpu_to_le16(priv->scan_max_time);
1990 	scan.probe_delay = cpu_to_le16(priv->scan_min_time * 1000);
1991 	scan.international_scan = 0;
1992 
1993 	at76_dbg(DBG_MAC80211, "%s: sending CMD_SCAN", __func__);
1994 	ret = at76_set_card_command(priv->udev, CMD_SCAN, &scan, sizeof(scan));
1995 
1996 	if (ret < 0) {
1997 		wiphy_err(priv->hw->wiphy, "CMD_SCAN failed: %d\n", ret);
1998 		goto exit;
1999 	}
2000 
2001 	priv->scanning = true;
2002 	ieee80211_queue_delayed_work(priv->hw, &priv->dwork_hw_scan,
2003 				     SCAN_POLL_INTERVAL);
2004 
2005 exit:
2006 	mutex_unlock(&priv->mtx);
2007 
2008 	return 0;
2009 }
2010 
at76_config(struct ieee80211_hw * hw,u32 changed)2011 static int at76_config(struct ieee80211_hw *hw, u32 changed)
2012 {
2013 	struct at76_priv *priv = hw->priv;
2014 
2015 	at76_dbg(DBG_MAC80211, "%s(): channel %d",
2016 		 __func__, hw->conf.chandef.chan->hw_value);
2017 	at76_dbg_dump(DBG_MAC80211, priv->bssid, ETH_ALEN, "bssid:");
2018 
2019 	mutex_lock(&priv->mtx);
2020 
2021 	priv->channel = hw->conf.chandef.chan->hw_value;
2022 
2023 	if (is_valid_ether_addr(priv->bssid))
2024 		at76_join(priv);
2025 	else
2026 		at76_start_monitor(priv);
2027 
2028 	mutex_unlock(&priv->mtx);
2029 
2030 	return 0;
2031 }
2032 
at76_bss_info_changed(struct ieee80211_hw * hw,struct ieee80211_vif * vif,struct ieee80211_bss_conf * conf,u32 changed)2033 static void at76_bss_info_changed(struct ieee80211_hw *hw,
2034 				  struct ieee80211_vif *vif,
2035 				  struct ieee80211_bss_conf *conf,
2036 				  u32 changed)
2037 {
2038 	struct at76_priv *priv = hw->priv;
2039 
2040 	at76_dbg(DBG_MAC80211, "%s():", __func__);
2041 
2042 	if (!(changed & BSS_CHANGED_BSSID))
2043 		return;
2044 
2045 	at76_dbg_dump(DBG_MAC80211, conf->bssid, ETH_ALEN, "bssid:");
2046 
2047 	mutex_lock(&priv->mtx);
2048 
2049 	memcpy(priv->bssid, conf->bssid, ETH_ALEN);
2050 
2051 	if (is_valid_ether_addr(priv->bssid))
2052 		/* mac80211 is joining a bss */
2053 		at76_join(priv);
2054 
2055 	mutex_unlock(&priv->mtx);
2056 }
2057 
2058 /* must be atomic */
at76_configure_filter(struct ieee80211_hw * hw,unsigned int changed_flags,unsigned int * total_flags,u64 multicast)2059 static void at76_configure_filter(struct ieee80211_hw *hw,
2060 				  unsigned int changed_flags,
2061 				  unsigned int *total_flags, u64 multicast)
2062 {
2063 	struct at76_priv *priv = hw->priv;
2064 	int flags;
2065 
2066 	at76_dbg(DBG_MAC80211, "%s(): changed_flags=0x%08x "
2067 		 "total_flags=0x%08x",
2068 		 __func__, changed_flags, *total_flags);
2069 
2070 	flags = changed_flags & AT76_SUPPORTED_FILTERS;
2071 	*total_flags = AT76_SUPPORTED_FILTERS;
2072 
2073 	/* Bail out after updating flags to prevent a WARN_ON in mac80211. */
2074 	if (priv->device_unplugged)
2075 		return;
2076 
2077 	/* FIXME: access to priv->promisc should be protected with
2078 	 * priv->mtx, but it's impossible because this function needs to be
2079 	 * atomic */
2080 
2081 	if (flags && !priv->promisc) {
2082 		/* mac80211 wants us to enable promiscuous mode */
2083 		priv->promisc = 1;
2084 	} else if (!flags && priv->promisc) {
2085 		/* we need to disable promiscuous mode */
2086 		priv->promisc = 0;
2087 	} else
2088 		return;
2089 
2090 	ieee80211_queue_work(hw, &priv->work_set_promisc);
2091 }
2092 
at76_set_wep(struct at76_priv * priv)2093 static int at76_set_wep(struct at76_priv *priv)
2094 {
2095 	int ret = 0;
2096 	struct mib_mac_wep *mib_data = &priv->mib_buf.data.wep_mib;
2097 
2098 	priv->mib_buf.type = MIB_MAC_WEP;
2099 	priv->mib_buf.size = sizeof(struct mib_mac_wep);
2100 	priv->mib_buf.index = 0;
2101 
2102 	memset(mib_data, 0, sizeof(*mib_data));
2103 
2104 	if (priv->wep_enabled) {
2105 		if (priv->wep_keys_len[priv->wep_key_id] > WEP_SMALL_KEY_LEN)
2106 			mib_data->encryption_level = 2;
2107 		else
2108 			mib_data->encryption_level = 1;
2109 
2110 		/* always exclude unencrypted if WEP is active */
2111 		mib_data->exclude_unencrypted = 1;
2112 	} else {
2113 		mib_data->exclude_unencrypted = 0;
2114 		mib_data->encryption_level = 0;
2115 	}
2116 
2117 	mib_data->privacy_invoked = priv->wep_enabled;
2118 	mib_data->wep_default_key_id = priv->wep_key_id;
2119 	memcpy(mib_data->wep_default_keyvalue, priv->wep_keys,
2120 	       sizeof(priv->wep_keys));
2121 
2122 	ret = at76_set_mib(priv, &priv->mib_buf);
2123 
2124 	if (ret < 0)
2125 		wiphy_err(priv->hw->wiphy,
2126 			  "set_mib (wep) failed: %d\n", ret);
2127 
2128 	return ret;
2129 }
2130 
at76_set_key(struct ieee80211_hw * hw,enum set_key_cmd cmd,struct ieee80211_vif * vif,struct ieee80211_sta * sta,struct ieee80211_key_conf * key)2131 static int at76_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2132 			struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2133 			struct ieee80211_key_conf *key)
2134 {
2135 	struct at76_priv *priv = hw->priv;
2136 
2137 	int i;
2138 
2139 	at76_dbg(DBG_MAC80211, "%s(): cmd %d key->cipher %d key->keyidx %d "
2140 		 "key->keylen %d",
2141 		 __func__, cmd, key->cipher, key->keyidx, key->keylen);
2142 
2143 	if ((key->cipher != WLAN_CIPHER_SUITE_WEP40) &&
2144 	    (key->cipher != WLAN_CIPHER_SUITE_WEP104))
2145 		return -EOPNOTSUPP;
2146 
2147 	key->hw_key_idx = key->keyidx;
2148 
2149 	mutex_lock(&priv->mtx);
2150 
2151 	switch (cmd) {
2152 	case SET_KEY:
2153 		memcpy(priv->wep_keys[key->keyidx], key->key, key->keylen);
2154 		priv->wep_keys_len[key->keyidx] = key->keylen;
2155 
2156 		/* FIXME: find out how to do this properly */
2157 		priv->wep_key_id = key->keyidx;
2158 
2159 		break;
2160 	case DISABLE_KEY:
2161 	default:
2162 		priv->wep_keys_len[key->keyidx] = 0;
2163 		break;
2164 	}
2165 
2166 	priv->wep_enabled = 0;
2167 
2168 	for (i = 0; i < WEP_KEYS; i++) {
2169 		if (priv->wep_keys_len[i] != 0)
2170 			priv->wep_enabled = 1;
2171 	}
2172 
2173 	at76_set_wep(priv);
2174 
2175 	mutex_unlock(&priv->mtx);
2176 
2177 	return 0;
2178 }
2179 
2180 static const struct ieee80211_ops at76_ops = {
2181 	.tx = at76_mac80211_tx,
2182 	.add_interface = at76_add_interface,
2183 	.remove_interface = at76_remove_interface,
2184 	.config = at76_config,
2185 	.bss_info_changed = at76_bss_info_changed,
2186 	.configure_filter = at76_configure_filter,
2187 	.start = at76_mac80211_start,
2188 	.stop = at76_mac80211_stop,
2189 	.hw_scan = at76_hw_scan,
2190 	.set_key = at76_set_key,
2191 };
2192 
2193 /* Allocate network device and initialize private data */
at76_alloc_new_device(struct usb_device * udev)2194 static struct at76_priv *at76_alloc_new_device(struct usb_device *udev)
2195 {
2196 	struct ieee80211_hw *hw;
2197 	struct at76_priv *priv;
2198 
2199 	hw = ieee80211_alloc_hw(sizeof(struct at76_priv), &at76_ops);
2200 	if (!hw) {
2201 		printk(KERN_ERR DRIVER_NAME ": could not register"
2202 		       " ieee80211_hw\n");
2203 		return NULL;
2204 	}
2205 
2206 	priv = hw->priv;
2207 	priv->hw = hw;
2208 
2209 	priv->udev = udev;
2210 
2211 	mutex_init(&priv->mtx);
2212 	INIT_WORK(&priv->work_set_promisc, at76_work_set_promisc);
2213 	INIT_WORK(&priv->work_submit_rx, at76_work_submit_rx);
2214 	INIT_WORK(&priv->work_join_bssid, at76_work_join_bssid);
2215 	INIT_DELAYED_WORK(&priv->dwork_hw_scan, at76_dwork_hw_scan);
2216 
2217 	tasklet_setup(&priv->rx_tasklet, at76_rx_tasklet);
2218 
2219 	priv->pm_mode = AT76_PM_OFF;
2220 	priv->pm_period = 0;
2221 
2222 	/* unit us */
2223 
2224 	return priv;
2225 }
2226 
at76_alloc_urbs(struct at76_priv * priv,struct usb_interface * interface)2227 static int at76_alloc_urbs(struct at76_priv *priv,
2228 			   struct usb_interface *interface)
2229 {
2230 	struct usb_endpoint_descriptor *endpoint, *ep_in, *ep_out;
2231 	int i;
2232 	int buffer_size;
2233 	struct usb_host_interface *iface_desc;
2234 
2235 	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
2236 
2237 	at76_dbg(DBG_URB, "%s: NumEndpoints %d ", __func__,
2238 		 interface->cur_altsetting->desc.bNumEndpoints);
2239 
2240 	ep_in = NULL;
2241 	ep_out = NULL;
2242 	iface_desc = interface->cur_altsetting;
2243 	for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
2244 		endpoint = &iface_desc->endpoint[i].desc;
2245 
2246 		at76_dbg(DBG_URB, "%s: %d. endpoint: addr 0x%x attr 0x%x",
2247 			 __func__, i, endpoint->bEndpointAddress,
2248 			 endpoint->bmAttributes);
2249 
2250 		if (!ep_in && usb_endpoint_is_bulk_in(endpoint))
2251 			ep_in = endpoint;
2252 
2253 		if (!ep_out && usb_endpoint_is_bulk_out(endpoint))
2254 			ep_out = endpoint;
2255 	}
2256 
2257 	if (!ep_in || !ep_out) {
2258 		dev_err(&interface->dev, "bulk endpoints missing\n");
2259 		return -ENXIO;
2260 	}
2261 
2262 	priv->rx_pipe = usb_rcvbulkpipe(priv->udev, ep_in->bEndpointAddress);
2263 	priv->tx_pipe = usb_sndbulkpipe(priv->udev, ep_out->bEndpointAddress);
2264 
2265 	priv->rx_urb = usb_alloc_urb(0, GFP_KERNEL);
2266 	priv->tx_urb = usb_alloc_urb(0, GFP_KERNEL);
2267 	if (!priv->rx_urb || !priv->tx_urb) {
2268 		dev_err(&interface->dev, "cannot allocate URB\n");
2269 		return -ENOMEM;
2270 	}
2271 
2272 	buffer_size = sizeof(struct at76_tx_buffer) + MAX_PADDING_SIZE;
2273 	priv->bulk_out_buffer = kmalloc(buffer_size, GFP_KERNEL);
2274 	if (!priv->bulk_out_buffer)
2275 		return -ENOMEM;
2276 
2277 	at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
2278 
2279 	return 0;
2280 }
2281 
2282 static struct ieee80211_rate at76_rates[] = {
2283 	{ .bitrate = 10, .hw_value = TX_RATE_1MBIT, },
2284 	{ .bitrate = 20, .hw_value = TX_RATE_2MBIT, },
2285 	{ .bitrate = 55, .hw_value = TX_RATE_5_5MBIT, },
2286 	{ .bitrate = 110, .hw_value = TX_RATE_11MBIT, },
2287 };
2288 
2289 static struct ieee80211_channel at76_channels[] = {
2290 	{ .center_freq = 2412, .hw_value = 1 },
2291 	{ .center_freq = 2417, .hw_value = 2 },
2292 	{ .center_freq = 2422, .hw_value = 3 },
2293 	{ .center_freq = 2427, .hw_value = 4 },
2294 	{ .center_freq = 2432, .hw_value = 5 },
2295 	{ .center_freq = 2437, .hw_value = 6 },
2296 	{ .center_freq = 2442, .hw_value = 7 },
2297 	{ .center_freq = 2447, .hw_value = 8 },
2298 	{ .center_freq = 2452, .hw_value = 9 },
2299 	{ .center_freq = 2457, .hw_value = 10 },
2300 	{ .center_freq = 2462, .hw_value = 11 },
2301 	{ .center_freq = 2467, .hw_value = 12 },
2302 	{ .center_freq = 2472, .hw_value = 13 },
2303 	{ .center_freq = 2484, .hw_value = 14 }
2304 };
2305 
2306 static struct ieee80211_supported_band at76_supported_band = {
2307 	.channels = at76_channels,
2308 	.n_channels = ARRAY_SIZE(at76_channels),
2309 	.bitrates = at76_rates,
2310 	.n_bitrates = ARRAY_SIZE(at76_rates),
2311 };
2312 
2313 /* Register network device and initialize the hardware */
at76_init_new_device(struct at76_priv * priv,struct usb_interface * interface)2314 static int at76_init_new_device(struct at76_priv *priv,
2315 				struct usb_interface *interface)
2316 {
2317 	struct wiphy *wiphy;
2318 	size_t len;
2319 	int ret;
2320 
2321 	/* set up the endpoint information */
2322 	/* check out the endpoints */
2323 
2324 	at76_dbg(DBG_DEVSTART, "USB interface: %d endpoints",
2325 		 interface->cur_altsetting->desc.bNumEndpoints);
2326 
2327 	ret = at76_alloc_urbs(priv, interface);
2328 	if (ret < 0)
2329 		goto exit;
2330 
2331 	/* MAC address */
2332 	ret = at76_get_hw_config(priv);
2333 	if (ret < 0) {
2334 		dev_err(&interface->dev, "cannot get MAC address\n");
2335 		goto exit;
2336 	}
2337 
2338 	priv->domain = at76_get_reg_domain(priv->regulatory_domain);
2339 
2340 	priv->channel = DEF_CHANNEL;
2341 	priv->iw_mode = IW_MODE_INFRA;
2342 	priv->rts_threshold = DEF_RTS_THRESHOLD;
2343 	priv->frag_threshold = DEF_FRAG_THRESHOLD;
2344 	priv->short_retry_limit = DEF_SHORT_RETRY_LIMIT;
2345 	priv->txrate = TX_RATE_AUTO;
2346 	priv->preamble_type = PREAMBLE_TYPE_LONG;
2347 	priv->beacon_period = 100;
2348 	priv->auth_mode = WLAN_AUTH_OPEN;
2349 	priv->scan_min_time = DEF_SCAN_MIN_TIME;
2350 	priv->scan_max_time = DEF_SCAN_MAX_TIME;
2351 	priv->scan_mode = SCAN_TYPE_ACTIVE;
2352 	priv->device_unplugged = 0;
2353 
2354 	/* mac80211 initialisation */
2355 	wiphy = priv->hw->wiphy;
2356 	priv->hw->wiphy->max_scan_ssids = 1;
2357 	priv->hw->wiphy->max_scan_ie_len = 0;
2358 	priv->hw->wiphy->interface_modes = BIT(NL80211_IFTYPE_STATION);
2359 	priv->hw->wiphy->bands[NL80211_BAND_2GHZ] = &at76_supported_band;
2360 	ieee80211_hw_set(priv->hw, RX_INCLUDES_FCS);
2361 	ieee80211_hw_set(priv->hw, SIGNAL_UNSPEC);
2362 	priv->hw->max_signal = 100;
2363 
2364 	SET_IEEE80211_DEV(priv->hw, &interface->dev);
2365 	SET_IEEE80211_PERM_ADDR(priv->hw, priv->mac_addr);
2366 
2367 	len = sizeof(wiphy->fw_version);
2368 	snprintf(wiphy->fw_version, len, "%d.%d.%d-%d",
2369 		 priv->fw_version.major, priv->fw_version.minor,
2370 		 priv->fw_version.patch, priv->fw_version.build);
2371 
2372 	wiphy->hw_version = priv->board_type;
2373 
2374 	wiphy_ext_feature_set(wiphy, NL80211_EXT_FEATURE_CQM_RSSI_LIST);
2375 
2376 	ret = ieee80211_register_hw(priv->hw);
2377 	if (ret) {
2378 		printk(KERN_ERR "cannot register mac80211 hw (status %d)!\n",
2379 		       ret);
2380 		goto exit;
2381 	}
2382 
2383 	priv->mac80211_registered = 1;
2384 
2385 	wiphy_info(priv->hw->wiphy, "USB %s, MAC %pM, firmware %d.%d.%d-%d\n",
2386 		   dev_name(&interface->dev), priv->mac_addr,
2387 		   priv->fw_version.major, priv->fw_version.minor,
2388 		   priv->fw_version.patch, priv->fw_version.build);
2389 	wiphy_info(priv->hw->wiphy, "regulatory domain 0x%02x: %s\n",
2390 		   priv->regulatory_domain, priv->domain->name);
2391 
2392 exit:
2393 	return ret;
2394 }
2395 
at76_delete_device(struct at76_priv * priv)2396 static void at76_delete_device(struct at76_priv *priv)
2397 {
2398 	at76_dbg(DBG_PROC_ENTRY, "%s: ENTER", __func__);
2399 
2400 	/* The device is gone, don't bother turning it off */
2401 	priv->device_unplugged = 1;
2402 
2403 	tasklet_kill(&priv->rx_tasklet);
2404 
2405 	if (priv->mac80211_registered)
2406 		ieee80211_unregister_hw(priv->hw);
2407 
2408 	if (priv->tx_urb) {
2409 		usb_kill_urb(priv->tx_urb);
2410 		usb_free_urb(priv->tx_urb);
2411 	}
2412 	if (priv->rx_urb) {
2413 		usb_kill_urb(priv->rx_urb);
2414 		usb_free_urb(priv->rx_urb);
2415 	}
2416 
2417 	at76_dbg(DBG_PROC_ENTRY, "%s: unlinked urbs", __func__);
2418 
2419 	kfree(priv->bulk_out_buffer);
2420 
2421 	del_timer_sync(&ledtrig_tx_timer);
2422 
2423 	kfree_skb(priv->rx_skb);
2424 
2425 	at76_dbg(DBG_PROC_ENTRY, "%s: before freeing priv/ieee80211_hw",
2426 		 __func__);
2427 	ieee80211_free_hw(priv->hw);
2428 
2429 	at76_dbg(DBG_PROC_ENTRY, "%s: EXIT", __func__);
2430 }
2431 
at76_probe(struct usb_interface * interface,const struct usb_device_id * id)2432 static int at76_probe(struct usb_interface *interface,
2433 		      const struct usb_device_id *id)
2434 {
2435 	int ret;
2436 	struct at76_priv *priv;
2437 	struct fwentry *fwe;
2438 	struct usb_device *udev;
2439 	int op_mode;
2440 	int need_ext_fw = 0;
2441 	struct mib_fw_version *fwv = NULL;
2442 	int board_type = (int)id->driver_info;
2443 
2444 	udev = usb_get_dev(interface_to_usbdev(interface));
2445 
2446 	fwv = kmalloc(sizeof(*fwv), GFP_KERNEL);
2447 	if (!fwv) {
2448 		ret = -ENOMEM;
2449 		goto exit;
2450 	}
2451 
2452 	/* Load firmware into kernel memory */
2453 	fwe = at76_load_firmware(udev, board_type);
2454 	if (!fwe) {
2455 		ret = -ENOENT;
2456 		goto exit;
2457 	}
2458 
2459 	op_mode = at76_get_op_mode(udev);
2460 
2461 	at76_dbg(DBG_DEVSTART, "opmode %d", op_mode);
2462 
2463 	/* we get OPMODE_NONE with 2.4.23, SMC2662W-AR ???
2464 	   we get 204 with 2.4.23, Fiberline FL-WL240u (505A+RFMD2958) ??? */
2465 
2466 	if (op_mode == OPMODE_HW_CONFIG_MODE) {
2467 		dev_err(&interface->dev,
2468 			"cannot handle a device in HW_CONFIG_MODE\n");
2469 		ret = -EBUSY;
2470 		goto exit;
2471 	}
2472 
2473 	if (op_mode != OPMODE_NORMAL_NIC_WITH_FLASH
2474 	    && op_mode != OPMODE_NORMAL_NIC_WITHOUT_FLASH) {
2475 		/* download internal firmware part */
2476 		dev_printk(KERN_DEBUG, &interface->dev,
2477 			   "downloading internal firmware\n");
2478 		ret = at76_load_internal_fw(udev, fwe);
2479 		if (ret < 0) {
2480 			dev_err(&interface->dev,
2481 				"error %d downloading internal firmware\n",
2482 				ret);
2483 		}
2484 		goto exit;
2485 	}
2486 
2487 	/* Internal firmware already inside the device.  Get firmware
2488 	 * version to test if external firmware is loaded.
2489 	 * This works only for newer firmware, e.g. the Intersil 0.90.x
2490 	 * says "control timeout on ep0in" and subsequent
2491 	 * at76_get_op_mode() fail too :-( */
2492 
2493 	/* if version >= 0.100.x.y or device with built-in flash we can
2494 	 * query the device for the fw version */
2495 	if ((fwe->fw_version.major > 0 || fwe->fw_version.minor >= 100)
2496 	    || (op_mode == OPMODE_NORMAL_NIC_WITH_FLASH)) {
2497 		ret = at76_get_mib(udev, MIB_FW_VERSION, fwv, sizeof(*fwv));
2498 		if (ret < 0 || (fwv->major | fwv->minor) == 0)
2499 			need_ext_fw = 1;
2500 	} else
2501 		/* No way to check firmware version, reload to be sure */
2502 		need_ext_fw = 1;
2503 
2504 	if (need_ext_fw) {
2505 		dev_printk(KERN_DEBUG, &interface->dev,
2506 			   "downloading external firmware\n");
2507 
2508 		ret = at76_load_external_fw(udev, fwe);
2509 		if (ret < 0)
2510 			goto exit;
2511 
2512 		/* Re-check firmware version */
2513 		ret = at76_get_mib(udev, MIB_FW_VERSION, fwv, sizeof(*fwv));
2514 		if (ret < 0) {
2515 			dev_err(&interface->dev,
2516 				"error %d getting firmware version\n", ret);
2517 			goto exit;
2518 		}
2519 	}
2520 
2521 	priv = at76_alloc_new_device(udev);
2522 	if (!priv) {
2523 		ret = -ENOMEM;
2524 		goto exit;
2525 	}
2526 
2527 	usb_set_intfdata(interface, priv);
2528 
2529 	memcpy(&priv->fw_version, fwv, sizeof(struct mib_fw_version));
2530 	priv->board_type = board_type;
2531 
2532 	ret = at76_init_new_device(priv, interface);
2533 	if (ret < 0)
2534 		at76_delete_device(priv);
2535 
2536 exit:
2537 	kfree(fwv);
2538 	if (ret < 0)
2539 		usb_put_dev(udev);
2540 	return ret;
2541 }
2542 
at76_disconnect(struct usb_interface * interface)2543 static void at76_disconnect(struct usb_interface *interface)
2544 {
2545 	struct at76_priv *priv;
2546 
2547 	priv = usb_get_intfdata(interface);
2548 	usb_set_intfdata(interface, NULL);
2549 
2550 	/* Disconnect after loading internal firmware */
2551 	if (!priv)
2552 		return;
2553 
2554 	wiphy_info(priv->hw->wiphy, "disconnecting\n");
2555 	at76_delete_device(priv);
2556 	usb_put_dev(priv->udev);
2557 	dev_info(&interface->dev, "disconnected\n");
2558 }
2559 
2560 /* Structure for registering this driver with the USB subsystem */
2561 static struct usb_driver at76_driver = {
2562 	.name = DRIVER_NAME,
2563 	.probe = at76_probe,
2564 	.disconnect = at76_disconnect,
2565 	.id_table = dev_table,
2566 	.disable_hub_initiated_lpm = 1,
2567 };
2568 
at76_mod_init(void)2569 static int __init at76_mod_init(void)
2570 {
2571 	int result;
2572 
2573 	printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " loading\n");
2574 
2575 	/* register this driver with the USB subsystem */
2576 	result = usb_register(&at76_driver);
2577 	if (result < 0)
2578 		printk(KERN_ERR DRIVER_NAME
2579 		       ": usb_register failed (status %d)\n", result);
2580 	else
2581 		led_trigger_register_simple("at76_usb-tx", &ledtrig_tx);
2582 	return result;
2583 }
2584 
at76_mod_exit(void)2585 static void __exit at76_mod_exit(void)
2586 {
2587 	int i;
2588 
2589 	printk(KERN_INFO DRIVER_DESC " " DRIVER_VERSION " unloading\n");
2590 	usb_deregister(&at76_driver);
2591 	for (i = 0; i < ARRAY_SIZE(firmwares); i++)
2592 		release_firmware(firmwares[i].fw);
2593 	led_trigger_unregister_simple(ledtrig_tx);
2594 }
2595 
2596 module_param_named(debug, at76_debug, uint, 0600);
2597 MODULE_PARM_DESC(debug, "Debugging level");
2598 
2599 module_init(at76_mod_init);
2600 module_exit(at76_mod_exit);
2601 
2602 MODULE_AUTHOR("Oliver Kurth <oku@masqmail.cx>");
2603 MODULE_AUTHOR("Joerg Albert <joerg.albert@gmx.de>");
2604 MODULE_AUTHOR("Alex <alex@foogod.com>");
2605 MODULE_AUTHOR("Nick Jones");
2606 MODULE_AUTHOR("Balint Seeber <n0_5p4m_p13453@hotmail.com>");
2607 MODULE_AUTHOR("Pavel Roskin <proski@gnu.org>");
2608 MODULE_AUTHOR("Guido Guenther <agx@sigxcpu.org>");
2609 MODULE_AUTHOR("Kalle Valo <kalle.valo@iki.fi>");
2610 MODULE_AUTHOR("Sebastian Smolorz <sesmo@gmx.net>");
2611 MODULE_DESCRIPTION(DRIVER_DESC);
2612 MODULE_LICENSE("GPL");
2613