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Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6
[linux-2.6/linux-2.6-openrd.git] / drivers / net / wireless / atmel.c
blob3edbbcf0f54837b5c1ef52d870910df86150ab40
1 /*** -*- linux-c -*- **********************************************************
2
3 Driver for Atmel at76c502 at76c504 and at76c506 wireless cards.
4
5 Copyright 2000-2001 ATMEL Corporation.
6 Copyright 2003-2004 Simon Kelley.
7
8 This code was developed from version 2.1.1 of the Atmel drivers,
9 released by Atmel corp. under the GPL in December 2002. It also
10 includes code from the Linux aironet drivers (C) Benjamin Reed,
11 and the Linux PCMCIA package, (C) David Hinds and the Linux wireless
12 extensions, (C) Jean Tourrilhes.
13
14 The firmware module for reading the MAC address of the card comes from
15 net.russotto.AtmelMACFW, written by Matthew T. Russotto and copyright
16 by him. net.russotto.AtmelMACFW is used under the GPL license version 2.
17 This file contains the module in binary form and, under the terms
18 of the GPL, in source form. The source is located at the end of the file.
19
20 This program is free software; you can redistribute it and/or modify
21 it under the terms of the GNU General Public License as published by
22 the Free Software Foundation; either version 2 of the License, or
23 (at your option) any later version.
24
25 This software is distributed in the hope that it will be useful,
26 but WITHOUT ANY WARRANTY; without even the implied warranty of
27 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
28 GNU General Public License for more details.
29
30 You should have received a copy of the GNU General Public License
31 along with Atmel wireless lan drivers; if not, write to the Free Software
32 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33
34 For all queries about this code, please contact the current author,
35 Simon Kelley <simon@thekelleys.org.uk> and not Atmel Corporation.
36
37 Credit is due to HP UK and Cambridge Online Systems Ltd for supplying
38 hardware used during development of this driver.
39
40 ******************************************************************************/
41
42 #include <linux/init.h>
43
44 #include <linux/kernel.h>
45 #include <linux/ptrace.h>
46 #include <linux/slab.h>
47 #include <linux/string.h>
48 #include <linux/ctype.h>
49 #include <linux/timer.h>
50 #include <asm/byteorder.h>
51 #include <asm/io.h>
52 #include <asm/system.h>
53 #include <asm/uaccess.h>
54 #include <linux/module.h>
55 #include <linux/netdevice.h>
56 #include <linux/etherdevice.h>
57 #include <linux/skbuff.h>
58 #include <linux/if_arp.h>
59 #include <linux/ioport.h>
60 #include <linux/fcntl.h>
61 #include <linux/delay.h>
62 #include <linux/wireless.h>
63 #include <net/iw_handler.h>
64 #include <linux/crc32.h>
65 #include <linux/proc_fs.h>
66 #include <linux/device.h>
67 #include <linux/moduleparam.h>
68 #include <linux/firmware.h>
69 #include <linux/jiffies.h>
70 #include <linux/ieee80211.h>
71 #include "atmel.h"
72
73 #define DRIVER_MAJOR 0
74 #define DRIVER_MINOR 98
75
76 MODULE_AUTHOR("Simon Kelley");
77 MODULE_DESCRIPTION("Support for Atmel at76c50x 802.11 wireless ethernet cards.");
78 MODULE_LICENSE("GPL");
79 MODULE_SUPPORTED_DEVICE("Atmel at76c50x wireless cards");
80
81 /* The name of the firmware file to be loaded
82 over-rides any automatic selection */
83 static char *firmware = NULL;
84 module_param(firmware, charp, 0);
85
86 /* table of firmware file names */
87 static struct {
88 AtmelFWType fw_type;
89 const char *fw_file;
90 const char *fw_file_ext;
91 } fw_table[] = {
92 { ATMEL_FW_TYPE_502, "atmel_at76c502", "bin" },
93 { ATMEL_FW_TYPE_502D, "atmel_at76c502d", "bin" },
94 { ATMEL_FW_TYPE_502E, "atmel_at76c502e", "bin" },
95 { ATMEL_FW_TYPE_502_3COM, "atmel_at76c502_3com", "bin" },
96 { ATMEL_FW_TYPE_504, "atmel_at76c504", "bin" },
97 { ATMEL_FW_TYPE_504_2958, "atmel_at76c504_2958", "bin" },
98 { ATMEL_FW_TYPE_504A_2958, "atmel_at76c504a_2958", "bin" },
99 { ATMEL_FW_TYPE_506, "atmel_at76c506", "bin" },
100 { ATMEL_FW_TYPE_NONE, NULL, NULL }
101 };
102 MODULE_FIRMWARE("atmel_at76c502-wpa.bin");
103 MODULE_FIRMWARE("atmel_at76c502.bin");
104 MODULE_FIRMWARE("atmel_at76c502d-wpa.bin");
105 MODULE_FIRMWARE("atmel_at76c502d.bin");
106 MODULE_FIRMWARE("atmel_at76c502e-wpa.bin");
107 MODULE_FIRMWARE("atmel_at76c502e.bin");
108 MODULE_FIRMWARE("atmel_at76c502_3com-wpa.bin");
109 MODULE_FIRMWARE("atmel_at76c502_3com.bin");
110 MODULE_FIRMWARE("atmel_at76c504-wpa.bin");
111 MODULE_FIRMWARE("atmel_at76c504.bin");
112 MODULE_FIRMWARE("atmel_at76c504_2958-wpa.bin");
113 MODULE_FIRMWARE("atmel_at76c504_2958.bin");
114 MODULE_FIRMWARE("atmel_at76c504a_2958-wpa.bin");
115 MODULE_FIRMWARE("atmel_at76c504a_2958.bin");
116 MODULE_FIRMWARE("atmel_at76c506-wpa.bin");
117 MODULE_FIRMWARE("atmel_at76c506.bin");
118
119 #define MAX_SSID_LENGTH 32
120 #define MGMT_JIFFIES (256 * HZ / 100)
121
122 #define MAX_BSS_ENTRIES 64
123
124 /* registers */
125 #define GCR 0x00 /* (SIR0) General Configuration Register */
126 #define BSR 0x02 /* (SIR1) Bank Switching Select Register */
127 #define AR 0x04
128 #define DR 0x08
129 #define MR1 0x12 /* Mirror Register 1 */
130 #define MR2 0x14 /* Mirror Register 2 */
131 #define MR3 0x16 /* Mirror Register 3 */
132 #define MR4 0x18 /* Mirror Register 4 */
133
134 #define GPR1 0x0c
135 #define GPR2 0x0e
136 #define GPR3 0x10
137 /*
138 * Constants for the GCR register.
139 */
140 #define GCR_REMAP 0x0400 /* Remap internal SRAM to 0 */
141 #define GCR_SWRES 0x0080 /* BIU reset (ARM and PAI are NOT reset) */
142 #define GCR_CORES 0x0060 /* Core Reset (ARM and PAI are reset) */
143 #define GCR_ENINT 0x0002 /* Enable Interrupts */
144 #define GCR_ACKINT 0x0008 /* Acknowledge Interrupts */
145
146 #define BSS_SRAM 0x0200 /* AMBA module selection --> SRAM */
147 #define BSS_IRAM 0x0100 /* AMBA module selection --> IRAM */
148 /*
149 *Constants for the MR registers.
150 */
151 #define MAC_INIT_COMPLETE 0x0001 /* MAC init has been completed */
152 #define MAC_BOOT_COMPLETE 0x0010 /* MAC boot has been completed */
153 #define MAC_INIT_OK 0x0002 /* MAC boot has been completed */
154
155 #define MIB_MAX_DATA_BYTES 212
156 #define MIB_HEADER_SIZE 4 /* first four fields */
157
158 struct get_set_mib {
159 u8 type;
160 u8 size;
161 u8 index;
162 u8 reserved;
163 u8 data[MIB_MAX_DATA_BYTES];
164 };
165
166 struct rx_desc {
167 u32 Next;
168 u16 MsduPos;
169 u16 MsduSize;
170
171 u8 State;
172 u8 Status;
173 u8 Rate;
174 u8 Rssi;
175 u8 LinkQuality;
176 u8 PreambleType;
177 u16 Duration;
178 u32 RxTime;
179 };
180
181 #define RX_DESC_FLAG_VALID 0x80
182 #define RX_DESC_FLAG_CONSUMED 0x40
183 #define RX_DESC_FLAG_IDLE 0x00
184
185 #define RX_STATUS_SUCCESS 0x00
186
187 #define RX_DESC_MSDU_POS_OFFSET 4
188 #define RX_DESC_MSDU_SIZE_OFFSET 6
189 #define RX_DESC_FLAGS_OFFSET 8
190 #define RX_DESC_STATUS_OFFSET 9
191 #define RX_DESC_RSSI_OFFSET 11
192 #define RX_DESC_LINK_QUALITY_OFFSET 12
193 #define RX_DESC_PREAMBLE_TYPE_OFFSET 13
194 #define RX_DESC_DURATION_OFFSET 14
195 #define RX_DESC_RX_TIME_OFFSET 16
196
197 struct tx_desc {
198 u32 NextDescriptor;
199 u16 TxStartOfFrame;
200 u16 TxLength;
201
202 u8 TxState;
203 u8 TxStatus;
204 u8 RetryCount;
205
206 u8 TxRate;
207
208 u8 KeyIndex;
209 u8 ChiperType;
210 u8 ChipreLength;
211 u8 Reserved1;
212
213 u8 Reserved;
214 u8 PacketType;
215 u16 HostTxLength;
216 };
217
218 #define TX_DESC_NEXT_OFFSET 0
219 #define TX_DESC_POS_OFFSET 4
220 #define TX_DESC_SIZE_OFFSET 6
221 #define TX_DESC_FLAGS_OFFSET 8
222 #define TX_DESC_STATUS_OFFSET 9
223 #define TX_DESC_RETRY_OFFSET 10
224 #define TX_DESC_RATE_OFFSET 11
225 #define TX_DESC_KEY_INDEX_OFFSET 12
226 #define TX_DESC_CIPHER_TYPE_OFFSET 13
227 #define TX_DESC_CIPHER_LENGTH_OFFSET 14
228 #define TX_DESC_PACKET_TYPE_OFFSET 17
229 #define TX_DESC_HOST_LENGTH_OFFSET 18
230
231 /*
232 * Host-MAC interface
233 */
234
235 #define TX_STATUS_SUCCESS 0x00
236
237 #define TX_FIRM_OWN 0x80
238 #define TX_DONE 0x40
239
240 #define TX_ERROR 0x01
241
242 #define TX_PACKET_TYPE_DATA 0x01
243 #define TX_PACKET_TYPE_MGMT 0x02
244
245 #define ISR_EMPTY 0x00 /* no bits set in ISR */
246 #define ISR_TxCOMPLETE 0x01 /* packet transmitted */
247 #define ISR_RxCOMPLETE 0x02 /* packet received */
248 #define ISR_RxFRAMELOST 0x04 /* Rx Frame lost */
249 #define ISR_FATAL_ERROR 0x08 /* Fatal error */
250 #define ISR_COMMAND_COMPLETE 0x10 /* command completed */
251 #define ISR_OUT_OF_RANGE 0x20 /* command completed */
252 #define ISR_IBSS_MERGE 0x40 /* (4.1.2.30): IBSS merge */
253 #define ISR_GENERIC_IRQ 0x80
254
255 #define Local_Mib_Type 0x01
256 #define Mac_Address_Mib_Type 0x02
257 #define Mac_Mib_Type 0x03
258 #define Statistics_Mib_Type 0x04
259 #define Mac_Mgmt_Mib_Type 0x05
260 #define Mac_Wep_Mib_Type 0x06
261 #define Phy_Mib_Type 0x07
262 #define Multi_Domain_MIB 0x08
263
264 #define MAC_MGMT_MIB_CUR_BSSID_POS 14
265 #define MAC_MIB_FRAG_THRESHOLD_POS 8
266 #define MAC_MIB_RTS_THRESHOLD_POS 10
267 #define MAC_MIB_SHORT_RETRY_POS 16
268 #define MAC_MIB_LONG_RETRY_POS 17
269 #define MAC_MIB_SHORT_RETRY_LIMIT_POS 16
270 #define MAC_MGMT_MIB_BEACON_PER_POS 0
271 #define MAC_MGMT_MIB_STATION_ID_POS 6
272 #define MAC_MGMT_MIB_CUR_PRIVACY_POS 11
273 #define MAC_MGMT_MIB_CUR_BSSID_POS 14
274 #define MAC_MGMT_MIB_PS_MODE_POS 53
275 #define MAC_MGMT_MIB_LISTEN_INTERVAL_POS 54
276 #define MAC_MGMT_MIB_MULTI_DOMAIN_IMPLEMENTED 56
277 #define MAC_MGMT_MIB_MULTI_DOMAIN_ENABLED 57
278 #define PHY_MIB_CHANNEL_POS 14
279 #define PHY_MIB_RATE_SET_POS 20
280 #define PHY_MIB_REG_DOMAIN_POS 26
281 #define LOCAL_MIB_AUTO_TX_RATE_POS 3
282 #define LOCAL_MIB_SSID_SIZE 5
283 #define LOCAL_MIB_TX_PROMISCUOUS_POS 6
284 #define LOCAL_MIB_TX_MGMT_RATE_POS 7
285 #define LOCAL_MIB_TX_CONTROL_RATE_POS 8
286 #define LOCAL_MIB_PREAMBLE_TYPE 9
287 #define MAC_ADDR_MIB_MAC_ADDR_POS 0
288
289 #define CMD_Set_MIB_Vars 0x01
290 #define CMD_Get_MIB_Vars 0x02
291 #define CMD_Scan 0x03
292 #define CMD_Join 0x04
293 #define CMD_Start 0x05
294 #define CMD_EnableRadio 0x06
295 #define CMD_DisableRadio 0x07
296 #define CMD_SiteSurvey 0x0B
297
298 #define CMD_STATUS_IDLE 0x00
299 #define CMD_STATUS_COMPLETE 0x01
300 #define CMD_STATUS_UNKNOWN 0x02
301 #define CMD_STATUS_INVALID_PARAMETER 0x03
302 #define CMD_STATUS_FUNCTION_NOT_SUPPORTED 0x04
303 #define CMD_STATUS_TIME_OUT 0x07
304 #define CMD_STATUS_IN_PROGRESS 0x08
305 #define CMD_STATUS_REJECTED_RADIO_OFF 0x09
306 #define CMD_STATUS_HOST_ERROR 0xFF
307 #define CMD_STATUS_BUSY 0xFE
308
309 #define CMD_BLOCK_COMMAND_OFFSET 0
310 #define CMD_BLOCK_STATUS_OFFSET 1
311 #define CMD_BLOCK_PARAMETERS_OFFSET 4
312
313 #define SCAN_OPTIONS_SITE_SURVEY 0x80
314
315 #define MGMT_FRAME_BODY_OFFSET 24
316 #define MAX_AUTHENTICATION_RETRIES 3
317 #define MAX_ASSOCIATION_RETRIES 3
318
319 #define AUTHENTICATION_RESPONSE_TIME_OUT 1000
320
321 #define MAX_WIRELESS_BODY 2316 /* mtu is 2312, CRC is 4 */
322 #define LOOP_RETRY_LIMIT 500000
323
324 #define ACTIVE_MODE 1
325 #define PS_MODE 2
326
327 #define MAX_ENCRYPTION_KEYS 4
328 #define MAX_ENCRYPTION_KEY_SIZE 40
329
330 /*
331 * 802.11 related definitions
332 */
333
334 /*
335 * Regulatory Domains
336 */
337
338 #define REG_DOMAIN_FCC 0x10 /* Channels 1-11 USA */
339 #define REG_DOMAIN_DOC 0x20 /* Channel 1-11 Canada */
340 #define REG_DOMAIN_ETSI 0x30 /* Channel 1-13 Europe (ex Spain/France) */
341 #define REG_DOMAIN_SPAIN 0x31 /* Channel 10-11 Spain */
342 #define REG_DOMAIN_FRANCE 0x32 /* Channel 10-13 France */
343 #define REG_DOMAIN_MKK 0x40 /* Channel 14 Japan */
344 #define REG_DOMAIN_MKK1 0x41 /* Channel 1-14 Japan(MKK1) */
345 #define REG_DOMAIN_ISRAEL 0x50 /* Channel 3-9 ISRAEL */
346
347 #define BSS_TYPE_AD_HOC 1
348 #define BSS_TYPE_INFRASTRUCTURE 2
349
350 #define SCAN_TYPE_ACTIVE 0
351 #define SCAN_TYPE_PASSIVE 1
352
353 #define LONG_PREAMBLE 0
354 #define SHORT_PREAMBLE 1
355 #define AUTO_PREAMBLE 2
356
357 #define DATA_FRAME_WS_HEADER_SIZE 30
358
359 /* promiscuous mode control */
360 #define PROM_MODE_OFF 0x0
361 #define PROM_MODE_UNKNOWN 0x1
362 #define PROM_MODE_CRC_FAILED 0x2
363 #define PROM_MODE_DUPLICATED 0x4
364 #define PROM_MODE_MGMT 0x8
365 #define PROM_MODE_CTRL 0x10
366 #define PROM_MODE_BAD_PROTOCOL 0x20
367
368 #define IFACE_INT_STATUS_OFFSET 0
369 #define IFACE_INT_MASK_OFFSET 1
370 #define IFACE_LOCKOUT_HOST_OFFSET 2
371 #define IFACE_LOCKOUT_MAC_OFFSET 3
372 #define IFACE_FUNC_CTRL_OFFSET 28
373 #define IFACE_MAC_STAT_OFFSET 30
374 #define IFACE_GENERIC_INT_TYPE_OFFSET 32
375
376 #define CIPHER_SUITE_NONE 0
377 #define CIPHER_SUITE_WEP_64 1
378 #define CIPHER_SUITE_TKIP 2
379 #define CIPHER_SUITE_AES 3
380 #define CIPHER_SUITE_CCX 4
381 #define CIPHER_SUITE_WEP_128 5
382
383 /*
384 * IFACE MACROS & definitions
385 */
386
387 /*
388 * FuncCtrl field:
389 */
390 #define FUNC_CTRL_TxENABLE 0x10
391 #define FUNC_CTRL_RxENABLE 0x20
392 #define FUNC_CTRL_INIT_COMPLETE 0x01
393
394 /* A stub firmware image which reads the MAC address from NVRAM on the card.
395 For copyright information and source see the end of this file. */
396 static u8 mac_reader[] = {
397 0x06, 0x00, 0x00, 0xea, 0x04, 0x00, 0x00, 0xea, 0x03, 0x00, 0x00, 0xea, 0x02, 0x00, 0x00, 0xea,
398 0x01, 0x00, 0x00, 0xea, 0x00, 0x00, 0x00, 0xea, 0xff, 0xff, 0xff, 0xea, 0xfe, 0xff, 0xff, 0xea,
399 0xd3, 0x00, 0xa0, 0xe3, 0x00, 0xf0, 0x21, 0xe1, 0x0e, 0x04, 0xa0, 0xe3, 0x00, 0x10, 0xa0, 0xe3,
400 0x81, 0x11, 0xa0, 0xe1, 0x00, 0x10, 0x81, 0xe3, 0x00, 0x10, 0x80, 0xe5, 0x1c, 0x10, 0x90, 0xe5,
401 0x10, 0x10, 0xc1, 0xe3, 0x1c, 0x10, 0x80, 0xe5, 0x01, 0x10, 0xa0, 0xe3, 0x08, 0x10, 0x80, 0xe5,
402 0x02, 0x03, 0xa0, 0xe3, 0x00, 0x10, 0xa0, 0xe3, 0xb0, 0x10, 0xc0, 0xe1, 0xb4, 0x10, 0xc0, 0xe1,
403 0xb8, 0x10, 0xc0, 0xe1, 0xbc, 0x10, 0xc0, 0xe1, 0x56, 0xdc, 0xa0, 0xe3, 0x21, 0x00, 0x00, 0xeb,
404 0x0a, 0x00, 0xa0, 0xe3, 0x1a, 0x00, 0x00, 0xeb, 0x10, 0x00, 0x00, 0xeb, 0x07, 0x00, 0x00, 0xeb,
405 0x02, 0x03, 0xa0, 0xe3, 0x02, 0x14, 0xa0, 0xe3, 0xb4, 0x10, 0xc0, 0xe1, 0x4c, 0x10, 0x9f, 0xe5,
406 0xbc, 0x10, 0xc0, 0xe1, 0x10, 0x10, 0xa0, 0xe3, 0xb8, 0x10, 0xc0, 0xe1, 0xfe, 0xff, 0xff, 0xea,
407 0x00, 0x40, 0x2d, 0xe9, 0x00, 0x20, 0xa0, 0xe3, 0x02, 0x3c, 0xa0, 0xe3, 0x00, 0x10, 0xa0, 0xe3,
408 0x28, 0x00, 0x9f, 0xe5, 0x37, 0x00, 0x00, 0xeb, 0x00, 0x40, 0xbd, 0xe8, 0x1e, 0xff, 0x2f, 0xe1,
409 0x00, 0x40, 0x2d, 0xe9, 0x12, 0x2e, 0xa0, 0xe3, 0x06, 0x30, 0xa0, 0xe3, 0x00, 0x10, 0xa0, 0xe3,
410 0x02, 0x04, 0xa0, 0xe3, 0x2f, 0x00, 0x00, 0xeb, 0x00, 0x40, 0xbd, 0xe8, 0x1e, 0xff, 0x2f, 0xe1,
411 0x00, 0x02, 0x00, 0x02, 0x80, 0x01, 0x90, 0xe0, 0x01, 0x00, 0x00, 0x0a, 0x01, 0x00, 0x50, 0xe2,
412 0xfc, 0xff, 0xff, 0xea, 0x1e, 0xff, 0x2f, 0xe1, 0x80, 0x10, 0xa0, 0xe3, 0xf3, 0x06, 0xa0, 0xe3,
413 0x00, 0x10, 0x80, 0xe5, 0x00, 0x10, 0xa0, 0xe3, 0x00, 0x10, 0x80, 0xe5, 0x01, 0x10, 0xa0, 0xe3,
414 0x04, 0x10, 0x80, 0xe5, 0x00, 0x10, 0x80, 0xe5, 0x0e, 0x34, 0xa0, 0xe3, 0x1c, 0x10, 0x93, 0xe5,
415 0x02, 0x1a, 0x81, 0xe3, 0x1c, 0x10, 0x83, 0xe5, 0x58, 0x11, 0x9f, 0xe5, 0x30, 0x10, 0x80, 0xe5,
416 0x54, 0x11, 0x9f, 0xe5, 0x34, 0x10, 0x80, 0xe5, 0x38, 0x10, 0x80, 0xe5, 0x3c, 0x10, 0x80, 0xe5,
417 0x10, 0x10, 0x90, 0xe5, 0x08, 0x00, 0x90, 0xe5, 0x1e, 0xff, 0x2f, 0xe1, 0xf3, 0x16, 0xa0, 0xe3,
418 0x08, 0x00, 0x91, 0xe5, 0x05, 0x00, 0xa0, 0xe3, 0x0c, 0x00, 0x81, 0xe5, 0x10, 0x00, 0x91, 0xe5,
419 0x02, 0x00, 0x10, 0xe3, 0xfc, 0xff, 0xff, 0x0a, 0xff, 0x00, 0xa0, 0xe3, 0x0c, 0x00, 0x81, 0xe5,
420 0x10, 0x00, 0x91, 0xe5, 0x02, 0x00, 0x10, 0xe3, 0xfc, 0xff, 0xff, 0x0a, 0x08, 0x00, 0x91, 0xe5,
421 0x10, 0x00, 0x91, 0xe5, 0x01, 0x00, 0x10, 0xe3, 0xfc, 0xff, 0xff, 0x0a, 0x08, 0x00, 0x91, 0xe5,
422 0xff, 0x00, 0x00, 0xe2, 0x1e, 0xff, 0x2f, 0xe1, 0x30, 0x40, 0x2d, 0xe9, 0x00, 0x50, 0xa0, 0xe1,
423 0x03, 0x40, 0xa0, 0xe1, 0xa2, 0x02, 0xa0, 0xe1, 0x08, 0x00, 0x00, 0xe2, 0x03, 0x00, 0x80, 0xe2,
424 0xd8, 0x10, 0x9f, 0xe5, 0x00, 0x00, 0xc1, 0xe5, 0x01, 0x20, 0xc1, 0xe5, 0xe2, 0xff, 0xff, 0xeb,
425 0x01, 0x00, 0x10, 0xe3, 0xfc, 0xff, 0xff, 0x1a, 0x14, 0x00, 0xa0, 0xe3, 0xc4, 0xff, 0xff, 0xeb,
426 0x04, 0x20, 0xa0, 0xe1, 0x05, 0x10, 0xa0, 0xe1, 0x02, 0x00, 0xa0, 0xe3, 0x01, 0x00, 0x00, 0xeb,
427 0x30, 0x40, 0xbd, 0xe8, 0x1e, 0xff, 0x2f, 0xe1, 0x70, 0x40, 0x2d, 0xe9, 0xf3, 0x46, 0xa0, 0xe3,
428 0x00, 0x30, 0xa0, 0xe3, 0x00, 0x00, 0x50, 0xe3, 0x08, 0x00, 0x00, 0x9a, 0x8c, 0x50, 0x9f, 0xe5,
429 0x03, 0x60, 0xd5, 0xe7, 0x0c, 0x60, 0x84, 0xe5, 0x10, 0x60, 0x94, 0xe5, 0x02, 0x00, 0x16, 0xe3,
430 0xfc, 0xff, 0xff, 0x0a, 0x01, 0x30, 0x83, 0xe2, 0x00, 0x00, 0x53, 0xe1, 0xf7, 0xff, 0xff, 0x3a,
431 0xff, 0x30, 0xa0, 0xe3, 0x0c, 0x30, 0x84, 0xe5, 0x08, 0x00, 0x94, 0xe5, 0x10, 0x00, 0x94, 0xe5,
432 0x01, 0x00, 0x10, 0xe3, 0xfc, 0xff, 0xff, 0x0a, 0x08, 0x00, 0x94, 0xe5, 0x00, 0x00, 0xa0, 0xe3,
433 0x00, 0x00, 0x52, 0xe3, 0x0b, 0x00, 0x00, 0x9a, 0x10, 0x50, 0x94, 0xe5, 0x02, 0x00, 0x15, 0xe3,
434 0xfc, 0xff, 0xff, 0x0a, 0x0c, 0x30, 0x84, 0xe5, 0x10, 0x50, 0x94, 0xe5, 0x01, 0x00, 0x15, 0xe3,
435 0xfc, 0xff, 0xff, 0x0a, 0x08, 0x50, 0x94, 0xe5, 0x01, 0x50, 0xc1, 0xe4, 0x01, 0x00, 0x80, 0xe2,
436 0x02, 0x00, 0x50, 0xe1, 0xf3, 0xff, 0xff, 0x3a, 0xc8, 0x00, 0xa0, 0xe3, 0x98, 0xff, 0xff, 0xeb,
437 0x70, 0x40, 0xbd, 0xe8, 0x1e, 0xff, 0x2f, 0xe1, 0x01, 0x0c, 0x00, 0x02, 0x01, 0x02, 0x00, 0x02,
438 0x00, 0x01, 0x00, 0x02
439 };
440
441 struct atmel_private {
442 void *card; /* Bus dependent stucture varies for PCcard */
443 int (*present_callback)(void *); /* And callback which uses it */
444 char firmware_id[32];
445 AtmelFWType firmware_type;
446 u8 *firmware;
447 int firmware_length;
448 struct timer_list management_timer;
449 struct net_device *dev;
450 struct device *sys_dev;
451 struct iw_statistics wstats;
452 spinlock_t irqlock, timerlock; /* spinlocks */
453 enum { BUS_TYPE_PCCARD, BUS_TYPE_PCI } bus_type;
454 enum {
455 CARD_TYPE_PARALLEL_FLASH,
456 CARD_TYPE_SPI_FLASH,
457 CARD_TYPE_EEPROM
458 } card_type;
459 int do_rx_crc; /* If we need to CRC incoming packets */
460 int probe_crc; /* set if we don't yet know */
461 int crc_ok_cnt, crc_ko_cnt; /* counters for probing */
462 u16 rx_desc_head;
463 u16 tx_desc_free, tx_desc_head, tx_desc_tail, tx_desc_previous;
464 u16 tx_free_mem, tx_buff_head, tx_buff_tail;
465
466 u16 frag_seq, frag_len, frag_no;
467 u8 frag_source[6];
468
469 u8 wep_is_on, default_key, exclude_unencrypted, encryption_level;
470 u8 group_cipher_suite, pairwise_cipher_suite;
471 u8 wep_keys[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
472 int wep_key_len[MAX_ENCRYPTION_KEYS];
473 int use_wpa, radio_on_broken; /* firmware dependent stuff. */
474
475 u16 host_info_base;
476 struct host_info_struct {
477 /* NB this is matched to the hardware, don't change. */
478 u8 volatile int_status;
479 u8 volatile int_mask;
480 u8 volatile lockout_host;
481 u8 volatile lockout_mac;
482
483 u16 tx_buff_pos;
484 u16 tx_buff_size;
485 u16 tx_desc_pos;
486 u16 tx_desc_count;
487
488 u16 rx_buff_pos;
489 u16 rx_buff_size;
490 u16 rx_desc_pos;
491 u16 rx_desc_count;
492
493 u16 build_version;
494 u16 command_pos;
495
496 u16 major_version;
497 u16 minor_version;
498
499 u16 func_ctrl;
500 u16 mac_status;
501 u16 generic_IRQ_type;
502 u8 reserved[2];
503 } host_info;
504
505 enum {
506 STATION_STATE_SCANNING,
507 STATION_STATE_JOINNING,
508 STATION_STATE_AUTHENTICATING,
509 STATION_STATE_ASSOCIATING,
510 STATION_STATE_READY,
511 STATION_STATE_REASSOCIATING,
512 STATION_STATE_DOWN,
513 STATION_STATE_MGMT_ERROR
514 } station_state;
515
516 int operating_mode, power_mode;
517 time_t last_qual;
518 int beacons_this_sec;
519 int channel;
520 int reg_domain, config_reg_domain;
521 int tx_rate;
522 int auto_tx_rate;
523 int rts_threshold;
524 int frag_threshold;
525 int long_retry, short_retry;
526 int preamble;
527 int default_beacon_period, beacon_period, listen_interval;
528 int CurrentAuthentTransactionSeqNum, ExpectedAuthentTransactionSeqNum;
529 int AuthenticationRequestRetryCnt, AssociationRequestRetryCnt, ReAssociationRequestRetryCnt;
530 enum {
531 SITE_SURVEY_IDLE,
532 SITE_SURVEY_IN_PROGRESS,
533 SITE_SURVEY_COMPLETED
534 } site_survey_state;
535 unsigned long last_survey;
536
537 int station_was_associated, station_is_associated;
538 int fast_scan;
539
540 struct bss_info {
541 int channel;
542 int SSIDsize;
543 int RSSI;
544 int UsingWEP;
545 int preamble;
546 int beacon_period;
547 int BSStype;
548 u8 BSSID[6];
549 u8 SSID[MAX_SSID_LENGTH];
550 } BSSinfo[MAX_BSS_ENTRIES];
551 int BSS_list_entries, current_BSS;
552 int connect_to_any_BSS;
553 int SSID_size, new_SSID_size;
554 u8 CurrentBSSID[6], BSSID[6];
555 u8 SSID[MAX_SSID_LENGTH], new_SSID[MAX_SSID_LENGTH];
556 u64 last_beacon_timestamp;
557 u8 rx_buf[MAX_WIRELESS_BODY];
558 };
559
560 static u8 atmel_basic_rates[4] = {0x82, 0x84, 0x0b, 0x16};
561
562 static const struct {
563 int reg_domain;
564 int min, max;
565 char *name;
566 } channel_table[] = { { REG_DOMAIN_FCC, 1, 11, "USA" },
567 { REG_DOMAIN_DOC, 1, 11, "Canada" },
568 { REG_DOMAIN_ETSI, 1, 13, "Europe" },
569 { REG_DOMAIN_SPAIN, 10, 11, "Spain" },
570 { REG_DOMAIN_FRANCE, 10, 13, "France" },
571 { REG_DOMAIN_MKK, 14, 14, "MKK" },
572 { REG_DOMAIN_MKK1, 1, 14, "MKK1" },
573 { REG_DOMAIN_ISRAEL, 3, 9, "Israel"} };
574
575 static void build_wpa_mib(struct atmel_private *priv);
576 static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
577 static void atmel_copy_to_card(struct net_device *dev, u16 dest,
578 const unsigned char *src, u16 len);
579 static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest,
580 u16 src, u16 len);
581 static void atmel_set_gcr(struct net_device *dev, u16 mask);
582 static void atmel_clear_gcr(struct net_device *dev, u16 mask);
583 static int atmel_lock_mac(struct atmel_private *priv);
584 static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data);
585 static void atmel_command_irq(struct atmel_private *priv);
586 static int atmel_validate_channel(struct atmel_private *priv, int channel);
587 static void atmel_management_frame(struct atmel_private *priv,
588 struct ieee80211_hdr *header,
589 u16 frame_len, u8 rssi);
590 static void atmel_management_timer(u_long a);
591 static void atmel_send_command(struct atmel_private *priv, int command,
592 void *cmd, int cmd_size);
593 static int atmel_send_command_wait(struct atmel_private *priv, int command,
594 void *cmd, int cmd_size);
595 static void atmel_transmit_management_frame(struct atmel_private *priv,
596 struct ieee80211_hdr *header,
597 u8 *body, int body_len);
598
599 static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index);
600 static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index,
601 u8 data);
602 static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index,
603 u16 data);
604 static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index,
605 u8 *data, int data_len);
606 static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index,
607 u8 *data, int data_len);
608 static void atmel_scan(struct atmel_private *priv, int specific_ssid);
609 static void atmel_join_bss(struct atmel_private *priv, int bss_index);
610 static void atmel_smooth_qual(struct atmel_private *priv);
611 static void atmel_writeAR(struct net_device *dev, u16 data);
612 static int probe_atmel_card(struct net_device *dev);
613 static int reset_atmel_card(struct net_device *dev);
614 static void atmel_enter_state(struct atmel_private *priv, int new_state);
615 int atmel_open (struct net_device *dev);
616
617 static inline u16 atmel_hi(struct atmel_private *priv, u16 offset)
618 {
619 return priv->host_info_base + offset;
620 }
621
622 static inline u16 atmel_co(struct atmel_private *priv, u16 offset)
623 {
624 return priv->host_info.command_pos + offset;
625 }
626
627 static inline u16 atmel_rx(struct atmel_private *priv, u16 offset, u16 desc)
628 {
629 return priv->host_info.rx_desc_pos + (sizeof(struct rx_desc) * desc) + offset;
630 }
631
632 static inline u16 atmel_tx(struct atmel_private *priv, u16 offset, u16 desc)
633 {
634 return priv->host_info.tx_desc_pos + (sizeof(struct tx_desc) * desc) + offset;
635 }
636
637 static inline u8 atmel_read8(struct net_device *dev, u16 offset)
638 {
639 return inb(dev->base_addr + offset);
640 }
641
642 static inline void atmel_write8(struct net_device *dev, u16 offset, u8 data)
643 {
644 outb(data, dev->base_addr + offset);
645 }
646
647 static inline u16 atmel_read16(struct net_device *dev, u16 offset)
648 {
649 return inw(dev->base_addr + offset);
650 }
651
652 static inline void atmel_write16(struct net_device *dev, u16 offset, u16 data)
653 {
654 outw(data, dev->base_addr + offset);
655 }
656
657 static inline u8 atmel_rmem8(struct atmel_private *priv, u16 pos)
658 {
659 atmel_writeAR(priv->dev, pos);
660 return atmel_read8(priv->dev, DR);
661 }
662
663 static inline void atmel_wmem8(struct atmel_private *priv, u16 pos, u16 data)
664 {
665 atmel_writeAR(priv->dev, pos);
666 atmel_write8(priv->dev, DR, data);
667 }
668
669 static inline u16 atmel_rmem16(struct atmel_private *priv, u16 pos)
670 {
671 atmel_writeAR(priv->dev, pos);
672 return atmel_read16(priv->dev, DR);
673 }
674
675 static inline void atmel_wmem16(struct atmel_private *priv, u16 pos, u16 data)
676 {
677 atmel_writeAR(priv->dev, pos);
678 atmel_write16(priv->dev, DR, data);
679 }
680
681 static const struct iw_handler_def atmel_handler_def;
682
683 static void tx_done_irq(struct atmel_private *priv)
684 {
685 int i;
686
687 for (i = 0;
688 atmel_rmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head)) == TX_DONE &&
689 i < priv->host_info.tx_desc_count;
690 i++) {
691 u8 status = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_STATUS_OFFSET, priv->tx_desc_head));
692 u16 msdu_size = atmel_rmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_head));
693 u8 type = atmel_rmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_head));
694
695 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_head), 0);
696
697 priv->tx_free_mem += msdu_size;
698 priv->tx_desc_free++;
699
700 if (priv->tx_buff_head + msdu_size > (priv->host_info.tx_buff_pos + priv->host_info.tx_buff_size))
701 priv->tx_buff_head = 0;
702 else
703 priv->tx_buff_head += msdu_size;
704
705 if (priv->tx_desc_head < (priv->host_info.tx_desc_count - 1))
706 priv->tx_desc_head++ ;
707 else
708 priv->tx_desc_head = 0;
709
710 if (type == TX_PACKET_TYPE_DATA) {
711 if (status == TX_STATUS_SUCCESS)
712 priv->dev->stats.tx_packets++;
713 else
714 priv->dev->stats.tx_errors++;
715 netif_wake_queue(priv->dev);
716 }
717 }
718 }
719
720 static u16 find_tx_buff(struct atmel_private *priv, u16 len)
721 {
722 u16 bottom_free = priv->host_info.tx_buff_size - priv->tx_buff_tail;
723
724 if (priv->tx_desc_free == 3 || priv->tx_free_mem < len)
725 return 0;
726
727 if (bottom_free >= len)
728 return priv->host_info.tx_buff_pos + priv->tx_buff_tail;
729
730 if (priv->tx_free_mem - bottom_free >= len) {
731 priv->tx_buff_tail = 0;
732 return priv->host_info.tx_buff_pos;
733 }
734
735 return 0;
736 }
737
738 static void tx_update_descriptor(struct atmel_private *priv, int is_bcast,
739 u16 len, u16 buff, u8 type)
740 {
741 atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, priv->tx_desc_tail), buff);
742 atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, priv->tx_desc_tail), len);
743 if (!priv->use_wpa)
744 atmel_wmem16(priv, atmel_tx(priv, TX_DESC_HOST_LENGTH_OFFSET, priv->tx_desc_tail), len);
745 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_PACKET_TYPE_OFFSET, priv->tx_desc_tail), type);
746 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RATE_OFFSET, priv->tx_desc_tail), priv->tx_rate);
747 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_RETRY_OFFSET, priv->tx_desc_tail), 0);
748 if (priv->use_wpa) {
749 int cipher_type, cipher_length;
750 if (is_bcast) {
751 cipher_type = priv->group_cipher_suite;
752 if (cipher_type == CIPHER_SUITE_WEP_64 ||
753 cipher_type == CIPHER_SUITE_WEP_128)
754 cipher_length = 8;
755 else if (cipher_type == CIPHER_SUITE_TKIP)
756 cipher_length = 12;
757 else if (priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_64 ||
758 priv->pairwise_cipher_suite == CIPHER_SUITE_WEP_128) {
759 cipher_type = priv->pairwise_cipher_suite;
760 cipher_length = 8;
761 } else {
762 cipher_type = CIPHER_SUITE_NONE;
763 cipher_length = 0;
764 }
765 } else {
766 cipher_type = priv->pairwise_cipher_suite;
767 if (cipher_type == CIPHER_SUITE_WEP_64 ||
768 cipher_type == CIPHER_SUITE_WEP_128)
769 cipher_length = 8;
770 else if (cipher_type == CIPHER_SUITE_TKIP)
771 cipher_length = 12;
772 else if (priv->group_cipher_suite == CIPHER_SUITE_WEP_64 ||
773 priv->group_cipher_suite == CIPHER_SUITE_WEP_128) {
774 cipher_type = priv->group_cipher_suite;
775 cipher_length = 8;
776 } else {
777 cipher_type = CIPHER_SUITE_NONE;
778 cipher_length = 0;
779 }
780 }
781
782 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_TYPE_OFFSET, priv->tx_desc_tail),
783 cipher_type);
784 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_CIPHER_LENGTH_OFFSET, priv->tx_desc_tail),
785 cipher_length);
786 }
787 atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_tail), 0x80000000L);
788 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, priv->tx_desc_tail), TX_FIRM_OWN);
789 if (priv->tx_desc_previous != priv->tx_desc_tail)
790 atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, priv->tx_desc_previous), 0);
791 priv->tx_desc_previous = priv->tx_desc_tail;
792 if (priv->tx_desc_tail < (priv->host_info.tx_desc_count - 1))
793 priv->tx_desc_tail++;
794 else
795 priv->tx_desc_tail = 0;
796 priv->tx_desc_free--;
797 priv->tx_free_mem -= len;
798 }
799
800 static netdev_tx_t start_tx(struct sk_buff *skb, struct net_device *dev)
801 {
802 static const u8 SNAP_RFC1024[6] = { 0xaa, 0xaa, 0x03, 0x00, 0x00, 0x00 };
803 struct atmel_private *priv = netdev_priv(dev);
804 struct ieee80211_hdr header;
805 unsigned long flags;
806 u16 buff, frame_ctl, len = (ETH_ZLEN < skb->len) ? skb->len : ETH_ZLEN;
807
808 if (priv->card && priv->present_callback &&
809 !(*priv->present_callback)(priv->card)) {
810 dev->stats.tx_errors++;
811 dev_kfree_skb(skb);
812 return NETDEV_TX_OK;
813 }
814
815 if (priv->station_state != STATION_STATE_READY) {
816 dev->stats.tx_errors++;
817 dev_kfree_skb(skb);
818 return NETDEV_TX_OK;
819 }
820
821 /* first ensure the timer func cannot run */
822 spin_lock_bh(&priv->timerlock);
823 /* then stop the hardware ISR */
824 spin_lock_irqsave(&priv->irqlock, flags);
825 /* nb doing the above in the opposite order will deadlock */
826
827 /* The Wireless Header is 30 bytes. In the Ethernet packet we "cut" the
828 12 first bytes (containing DA/SA) and put them in the appropriate
829 fields of the Wireless Header. Thus the packet length is then the
830 initial + 18 (+30-12) */
831
832 if (!(buff = find_tx_buff(priv, len + 18))) {
833 dev->stats.tx_dropped++;
834 spin_unlock_irqrestore(&priv->irqlock, flags);
835 spin_unlock_bh(&priv->timerlock);
836 netif_stop_queue(dev);
837 return NETDEV_TX_BUSY;
838 }
839
840 frame_ctl = IEEE80211_FTYPE_DATA;
841 header.duration_id = 0;
842 header.seq_ctrl = 0;
843 if (priv->wep_is_on)
844 frame_ctl |= IEEE80211_FCTL_PROTECTED;
845 if (priv->operating_mode == IW_MODE_ADHOC) {
846 skb_copy_from_linear_data(skb, &header.addr1, 6);
847 memcpy(&header.addr2, dev->dev_addr, 6);
848 memcpy(&header.addr3, priv->BSSID, 6);
849 } else {
850 frame_ctl |= IEEE80211_FCTL_TODS;
851 memcpy(&header.addr1, priv->CurrentBSSID, 6);
852 memcpy(&header.addr2, dev->dev_addr, 6);
853 skb_copy_from_linear_data(skb, &header.addr3, 6);
854 }
855
856 if (priv->use_wpa)
857 memcpy(&header.addr4, SNAP_RFC1024, 6);
858
859 header.frame_control = cpu_to_le16(frame_ctl);
860 /* Copy the wireless header into the card */
861 atmel_copy_to_card(dev, buff, (unsigned char *)&header, DATA_FRAME_WS_HEADER_SIZE);
862 /* Copy the packet sans its 802.3 header addresses which have been replaced */
863 atmel_copy_to_card(dev, buff + DATA_FRAME_WS_HEADER_SIZE, skb->data + 12, len - 12);
864 priv->tx_buff_tail += len - 12 + DATA_FRAME_WS_HEADER_SIZE;
865
866 /* low bit of first byte of destination tells us if broadcast */
867 tx_update_descriptor(priv, *(skb->data) & 0x01, len + 18, buff, TX_PACKET_TYPE_DATA);
868 dev->trans_start = jiffies;
869 dev->stats.tx_bytes += len;
870
871 spin_unlock_irqrestore(&priv->irqlock, flags);
872 spin_unlock_bh(&priv->timerlock);
873 dev_kfree_skb(skb);
874
875 return NETDEV_TX_OK;
876 }
877
878 static void atmel_transmit_management_frame(struct atmel_private *priv,
879 struct ieee80211_hdr *header,
880 u8 *body, int body_len)
881 {
882 u16 buff;
883 int len = MGMT_FRAME_BODY_OFFSET + body_len;
884
885 if (!(buff = find_tx_buff(priv, len)))
886 return;
887
888 atmel_copy_to_card(priv->dev, buff, (u8 *)header, MGMT_FRAME_BODY_OFFSET);
889 atmel_copy_to_card(priv->dev, buff + MGMT_FRAME_BODY_OFFSET, body, body_len);
890 priv->tx_buff_tail += len;
891 tx_update_descriptor(priv, header->addr1[0] & 0x01, len, buff, TX_PACKET_TYPE_MGMT);
892 }
893
894 static void fast_rx_path(struct atmel_private *priv,
895 struct ieee80211_hdr *header,
896 u16 msdu_size, u16 rx_packet_loc, u32 crc)
897 {
898 /* fast path: unfragmented packet copy directly into skbuf */
899 u8 mac4[6];
900 struct sk_buff *skb;
901 unsigned char *skbp;
902
903 /* get the final, mac 4 header field, this tells us encapsulation */
904 atmel_copy_to_host(priv->dev, mac4, rx_packet_loc + 24, 6);
905 msdu_size -= 6;
906
907 if (priv->do_rx_crc) {
908 crc = crc32_le(crc, mac4, 6);
909 msdu_size -= 4;
910 }
911
912 if (!(skb = dev_alloc_skb(msdu_size + 14))) {
913 priv->dev->stats.rx_dropped++;
914 return;
915 }
916
917 skb_reserve(skb, 2);
918 skbp = skb_put(skb, msdu_size + 12);
919 atmel_copy_to_host(priv->dev, skbp + 12, rx_packet_loc + 30, msdu_size);
920
921 if (priv->do_rx_crc) {
922 u32 netcrc;
923 crc = crc32_le(crc, skbp + 12, msdu_size);
924 atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + 30 + msdu_size, 4);
925 if ((crc ^ 0xffffffff) != netcrc) {
926 priv->dev->stats.rx_crc_errors++;
927 dev_kfree_skb(skb);
928 return;
929 }
930 }
931
932 memcpy(skbp, header->addr1, 6); /* destination address */
933 if (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FROMDS)
934 memcpy(&skbp[6], header->addr3, 6);
935 else
936 memcpy(&skbp[6], header->addr2, 6); /* source address */
937
938 skb->protocol = eth_type_trans(skb, priv->dev);
939 skb->ip_summed = CHECKSUM_NONE;
940 netif_rx(skb);
941 priv->dev->stats.rx_bytes += 12 + msdu_size;
942 priv->dev->stats.rx_packets++;
943 }
944
945 /* Test to see if the packet in card memory at packet_loc has a valid CRC
946 It doesn't matter that this is slow: it is only used to proble the first few
947 packets. */
948 static int probe_crc(struct atmel_private *priv, u16 packet_loc, u16 msdu_size)
949 {
950 int i = msdu_size - 4;
951 u32 netcrc, crc = 0xffffffff;
952
953 if (msdu_size < 4)
954 return 0;
955
956 atmel_copy_to_host(priv->dev, (void *)&netcrc, packet_loc + i, 4);
957
958 atmel_writeAR(priv->dev, packet_loc);
959 while (i--) {
960 u8 octet = atmel_read8(priv->dev, DR);
961 crc = crc32_le(crc, &octet, 1);
962 }
963
964 return (crc ^ 0xffffffff) == netcrc;
965 }
966
967 static void frag_rx_path(struct atmel_private *priv,
968 struct ieee80211_hdr *header,
969 u16 msdu_size, u16 rx_packet_loc, u32 crc, u16 seq_no,
970 u8 frag_no, int more_frags)
971 {
972 u8 mac4[6];
973 u8 source[6];
974 struct sk_buff *skb;
975
976 if (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FROMDS)
977 memcpy(source, header->addr3, 6);
978 else
979 memcpy(source, header->addr2, 6);
980
981 rx_packet_loc += 24; /* skip header */
982
983 if (priv->do_rx_crc)
984 msdu_size -= 4;
985
986 if (frag_no == 0) { /* first fragment */
987 atmel_copy_to_host(priv->dev, mac4, rx_packet_loc, 6);
988 msdu_size -= 6;
989 rx_packet_loc += 6;
990
991 if (priv->do_rx_crc)
992 crc = crc32_le(crc, mac4, 6);
993
994 priv->frag_seq = seq_no;
995 priv->frag_no = 1;
996 priv->frag_len = msdu_size;
997 memcpy(priv->frag_source, source, 6);
998 memcpy(&priv->rx_buf[6], source, 6);
999 memcpy(priv->rx_buf, header->addr1, 6);
1000
1001 atmel_copy_to_host(priv->dev, &priv->rx_buf[12], rx_packet_loc, msdu_size);
1002
1003 if (priv->do_rx_crc) {
1004 u32 netcrc;
1005 crc = crc32_le(crc, &priv->rx_buf[12], msdu_size);
1006 atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
1007 if ((crc ^ 0xffffffff) != netcrc) {
1008 priv->dev->stats.rx_crc_errors++;
1009 memset(priv->frag_source, 0xff, 6);
1010 }
1011 }
1012
1013 } else if (priv->frag_no == frag_no &&
1014 priv->frag_seq == seq_no &&
1015 memcmp(priv->frag_source, source, 6) == 0) {
1016
1017 atmel_copy_to_host(priv->dev, &priv->rx_buf[12 + priv->frag_len],
1018 rx_packet_loc, msdu_size);
1019 if (priv->do_rx_crc) {
1020 u32 netcrc;
1021 crc = crc32_le(crc,
1022 &priv->rx_buf[12 + priv->frag_len],
1023 msdu_size);
1024 atmel_copy_to_host(priv->dev, (void *)&netcrc, rx_packet_loc + msdu_size, 4);
1025 if ((crc ^ 0xffffffff) != netcrc) {
1026 priv->dev->stats.rx_crc_errors++;
1027 memset(priv->frag_source, 0xff, 6);
1028 more_frags = 1; /* don't send broken assembly */
1029 }
1030 }
1031
1032 priv->frag_len += msdu_size;
1033 priv->frag_no++;
1034
1035 if (!more_frags) { /* last one */
1036 memset(priv->frag_source, 0xff, 6);
1037 if (!(skb = dev_alloc_skb(priv->frag_len + 14))) {
1038 priv->dev->stats.rx_dropped++;
1039 } else {
1040 skb_reserve(skb, 2);
1041 memcpy(skb_put(skb, priv->frag_len + 12),
1042 priv->rx_buf,
1043 priv->frag_len + 12);
1044 skb->protocol = eth_type_trans(skb, priv->dev);
1045 skb->ip_summed = CHECKSUM_NONE;
1046 netif_rx(skb);
1047 priv->dev->stats.rx_bytes += priv->frag_len + 12;
1048 priv->dev->stats.rx_packets++;
1049 }
1050 }
1051 } else
1052 priv->wstats.discard.fragment++;
1053 }
1054
1055 static void rx_done_irq(struct atmel_private *priv)
1056 {
1057 int i;
1058 struct ieee80211_hdr header;
1059
1060 for (i = 0;
1061 atmel_rmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head)) == RX_DESC_FLAG_VALID &&
1062 i < priv->host_info.rx_desc_count;
1063 i++) {
1064
1065 u16 msdu_size, rx_packet_loc, frame_ctl, seq_control;
1066 u8 status = atmel_rmem8(priv, atmel_rx(priv, RX_DESC_STATUS_OFFSET, priv->rx_desc_head));
1067 u32 crc = 0xffffffff;
1068
1069 if (status != RX_STATUS_SUCCESS) {
1070 if (status == 0xc1) /* determined by experiment */
1071 priv->wstats.discard.nwid++;
1072 else
1073 priv->dev->stats.rx_errors++;
1074 goto next;
1075 }
1076
1077 msdu_size = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_SIZE_OFFSET, priv->rx_desc_head));
1078 rx_packet_loc = atmel_rmem16(priv, atmel_rx(priv, RX_DESC_MSDU_POS_OFFSET, priv->rx_desc_head));
1079
1080 if (msdu_size < 30) {
1081 priv->dev->stats.rx_errors++;
1082 goto next;
1083 }
1084
1085 /* Get header as far as end of seq_ctrl */
1086 atmel_copy_to_host(priv->dev, (char *)&header, rx_packet_loc, 24);
1087 frame_ctl = le16_to_cpu(header.frame_control);
1088 seq_control = le16_to_cpu(header.seq_ctrl);
1089
1090 /* probe for CRC use here if needed once five packets have
1091 arrived with the same crc status, we assume we know what's
1092 happening and stop probing */
1093 if (priv->probe_crc) {
1094 if (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED)) {
1095 priv->do_rx_crc = probe_crc(priv, rx_packet_loc, msdu_size);
1096 } else {
1097 priv->do_rx_crc = probe_crc(priv, rx_packet_loc + 24, msdu_size - 24);
1098 }
1099 if (priv->do_rx_crc) {
1100 if (priv->crc_ok_cnt++ > 5)
1101 priv->probe_crc = 0;
1102 } else {
1103 if (priv->crc_ko_cnt++ > 5)
1104 priv->probe_crc = 0;
1105 }
1106 }
1107
1108 /* don't CRC header when WEP in use */
1109 if (priv->do_rx_crc && (!priv->wep_is_on || !(frame_ctl & IEEE80211_FCTL_PROTECTED))) {
1110 crc = crc32_le(0xffffffff, (unsigned char *)&header, 24);
1111 }
1112 msdu_size -= 24; /* header */
1113
1114 if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_DATA) {
1115 int more_fragments = frame_ctl & IEEE80211_FCTL_MOREFRAGS;
1116 u8 packet_fragment_no = seq_control & IEEE80211_SCTL_FRAG;
1117 u16 packet_sequence_no = (seq_control & IEEE80211_SCTL_SEQ) >> 4;
1118
1119 if (!more_fragments && packet_fragment_no == 0) {
1120 fast_rx_path(priv, &header, msdu_size, rx_packet_loc, crc);
1121 } else {
1122 frag_rx_path(priv, &header, msdu_size, rx_packet_loc, crc,
1123 packet_sequence_no, packet_fragment_no, more_fragments);
1124 }
1125 }
1126
1127 if ((frame_ctl & IEEE80211_FCTL_FTYPE) == IEEE80211_FTYPE_MGMT) {
1128 /* copy rest of packet into buffer */
1129 atmel_copy_to_host(priv->dev, (unsigned char *)&priv->rx_buf, rx_packet_loc + 24, msdu_size);
1130
1131 /* we use the same buffer for frag reassembly and control packets */
1132 memset(priv->frag_source, 0xff, 6);
1133
1134 if (priv->do_rx_crc) {
1135 /* last 4 octets is crc */
1136 msdu_size -= 4;
1137 crc = crc32_le(crc, (unsigned char *)&priv->rx_buf, msdu_size);
1138 if ((crc ^ 0xffffffff) != (*((u32 *)&priv->rx_buf[msdu_size]))) {
1139 priv->dev->stats.rx_crc_errors++;
1140 goto next;
1141 }
1142 }
1143
1144 atmel_management_frame(priv, &header, msdu_size,
1145 atmel_rmem8(priv, atmel_rx(priv, RX_DESC_RSSI_OFFSET, priv->rx_desc_head)));
1146 }
1147
1148 next:
1149 /* release descriptor */
1150 atmel_wmem8(priv, atmel_rx(priv, RX_DESC_FLAGS_OFFSET, priv->rx_desc_head), RX_DESC_FLAG_CONSUMED);
1151
1152 if (priv->rx_desc_head < (priv->host_info.rx_desc_count - 1))
1153 priv->rx_desc_head++;
1154 else
1155 priv->rx_desc_head = 0;
1156 }
1157 }
1158
1159 static irqreturn_t service_interrupt(int irq, void *dev_id)
1160 {
1161 struct net_device *dev = (struct net_device *) dev_id;
1162 struct atmel_private *priv = netdev_priv(dev);
1163 u8 isr;
1164 int i = -1;
1165 static u8 irq_order[] = {
1166 ISR_OUT_OF_RANGE,
1167 ISR_RxCOMPLETE,
1168 ISR_TxCOMPLETE,
1169 ISR_RxFRAMELOST,
1170 ISR_FATAL_ERROR,
1171 ISR_COMMAND_COMPLETE,
1172 ISR_IBSS_MERGE,
1173 ISR_GENERIC_IRQ
1174 };
1175
1176 if (priv->card && priv->present_callback &&
1177 !(*priv->present_callback)(priv->card))
1178 return IRQ_HANDLED;
1179
1180 /* In this state upper-level code assumes it can mess with
1181 the card unhampered by interrupts which may change register state.
1182 Note that even though the card shouldn't generate interrupts
1183 the inturrupt line may be shared. This allows card setup
1184 to go on without disabling interrupts for a long time. */
1185 if (priv->station_state == STATION_STATE_DOWN)
1186 return IRQ_NONE;
1187
1188 atmel_clear_gcr(dev, GCR_ENINT); /* disable interrupts */
1189
1190 while (1) {
1191 if (!atmel_lock_mac(priv)) {
1192 /* failed to contact card */
1193 printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
1194 return IRQ_HANDLED;
1195 }
1196
1197 isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
1198 atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
1199
1200 if (!isr) {
1201 atmel_set_gcr(dev, GCR_ENINT); /* enable interrupts */
1202 return i == -1 ? IRQ_NONE : IRQ_HANDLED;
1203 }
1204
1205 atmel_set_gcr(dev, GCR_ACKINT); /* acknowledge interrupt */
1206
1207 for (i = 0; i < ARRAY_SIZE(irq_order); i++)
1208 if (isr & irq_order[i])
1209 break;
1210
1211 if (!atmel_lock_mac(priv)) {
1212 /* failed to contact card */
1213 printk(KERN_ALERT "%s: failed to contact MAC.\n", dev->name);
1214 return IRQ_HANDLED;
1215 }
1216
1217 isr = atmel_rmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET));
1218 isr ^= irq_order[i];
1219 atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_STATUS_OFFSET), isr);
1220 atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
1221
1222 switch (irq_order[i]) {
1223
1224 case ISR_OUT_OF_RANGE:
1225 if (priv->operating_mode == IW_MODE_INFRA &&
1226 priv->station_state == STATION_STATE_READY) {
1227 priv->station_is_associated = 0;
1228 atmel_scan(priv, 1);
1229 }
1230 break;
1231
1232 case ISR_RxFRAMELOST:
1233 priv->wstats.discard.misc++;
1234 /* fall through */
1235 case ISR_RxCOMPLETE:
1236 rx_done_irq(priv);
1237 break;
1238
1239 case ISR_TxCOMPLETE:
1240 tx_done_irq(priv);
1241 break;
1242
1243 case ISR_FATAL_ERROR:
1244 printk(KERN_ALERT "%s: *** FATAL error interrupt ***\n", dev->name);
1245 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
1246 break;
1247
1248 case ISR_COMMAND_COMPLETE:
1249 atmel_command_irq(priv);
1250 break;
1251
1252 case ISR_IBSS_MERGE:
1253 atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
1254 priv->CurrentBSSID, 6);
1255 /* The WPA stuff cares about the current AP address */
1256 if (priv->use_wpa)
1257 build_wpa_mib(priv);
1258 break;
1259 case ISR_GENERIC_IRQ:
1260 printk(KERN_INFO "%s: Generic_irq received.\n", dev->name);
1261 break;
1262 }
1263 }
1264 }
1265
1266 static struct iw_statistics *atmel_get_wireless_stats(struct net_device *dev)
1267 {
1268 struct atmel_private *priv = netdev_priv(dev);
1269
1270 /* update the link quality here in case we are seeing no beacons
1271 at all to drive the process */
1272 atmel_smooth_qual(priv);
1273
1274 priv->wstats.status = priv->station_state;
1275
1276 if (priv->operating_mode == IW_MODE_INFRA) {
1277 if (priv->station_state != STATION_STATE_READY) {
1278 priv->wstats.qual.qual = 0;
1279 priv->wstats.qual.level = 0;
1280 priv->wstats.qual.updated = (IW_QUAL_QUAL_INVALID
1281 | IW_QUAL_LEVEL_INVALID);
1282 }
1283 priv->wstats.qual.noise = 0;
1284 priv->wstats.qual.updated |= IW_QUAL_NOISE_INVALID;
1285 } else {
1286 /* Quality levels cannot be determined in ad-hoc mode,
1287 because we can 'hear' more that one remote station. */
1288 priv->wstats.qual.qual = 0;
1289 priv->wstats.qual.level = 0;
1290 priv->wstats.qual.noise = 0;
1291 priv->wstats.qual.updated = IW_QUAL_QUAL_INVALID
1292 | IW_QUAL_LEVEL_INVALID
1293 | IW_QUAL_NOISE_INVALID;
1294 priv->wstats.miss.beacon = 0;
1295 }
1296
1297 return &priv->wstats;
1298 }
1299
1300 static int atmel_change_mtu(struct net_device *dev, int new_mtu)
1301 {
1302 if ((new_mtu < 68) || (new_mtu > 2312))
1303 return -EINVAL;
1304 dev->mtu = new_mtu;
1305 return 0;
1306 }
1307
1308 static int atmel_set_mac_address(struct net_device *dev, void *p)
1309 {
1310 struct sockaddr *addr = p;
1311
1312 memcpy (dev->dev_addr, addr->sa_data, dev->addr_len);
1313 return atmel_open(dev);
1314 }
1315
1316 EXPORT_SYMBOL(atmel_open);
1317
1318 int atmel_open(struct net_device *dev)
1319 {
1320 struct atmel_private *priv = netdev_priv(dev);
1321 int i, channel, err;
1322
1323 /* any scheduled timer is no longer needed and might screw things up.. */
1324 del_timer_sync(&priv->management_timer);
1325
1326 /* Interrupts will not touch the card once in this state... */
1327 priv->station_state = STATION_STATE_DOWN;
1328
1329 if (priv->new_SSID_size) {
1330 memcpy(priv->SSID, priv->new_SSID, priv->new_SSID_size);
1331 priv->SSID_size = priv->new_SSID_size;
1332 priv->new_SSID_size = 0;
1333 }
1334 priv->BSS_list_entries = 0;
1335
1336 priv->AuthenticationRequestRetryCnt = 0;
1337 priv->AssociationRequestRetryCnt = 0;
1338 priv->ReAssociationRequestRetryCnt = 0;
1339 priv->CurrentAuthentTransactionSeqNum = 0x0001;
1340 priv->ExpectedAuthentTransactionSeqNum = 0x0002;
1341
1342 priv->site_survey_state = SITE_SURVEY_IDLE;
1343 priv->station_is_associated = 0;
1344
1345 err = reset_atmel_card(dev);
1346 if (err)
1347 return err;
1348
1349 if (priv->config_reg_domain) {
1350 priv->reg_domain = priv->config_reg_domain;
1351 atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS, priv->reg_domain);
1352 } else {
1353 priv->reg_domain = atmel_get_mib8(priv, Phy_Mib_Type, PHY_MIB_REG_DOMAIN_POS);
1354 for (i = 0; i < ARRAY_SIZE(channel_table); i++)
1355 if (priv->reg_domain == channel_table[i].reg_domain)
1356 break;
1357 if (i == ARRAY_SIZE(channel_table)) {
1358 priv->reg_domain = REG_DOMAIN_MKK1;
1359 printk(KERN_ALERT "%s: failed to get regulatory domain: assuming MKK1.\n", dev->name);
1360 }
1361 }
1362
1363 if ((channel = atmel_validate_channel(priv, priv->channel)))
1364 priv->channel = channel;
1365
1366 /* this moves station_state on.... */
1367 atmel_scan(priv, 1);
1368
1369 atmel_set_gcr(priv->dev, GCR_ENINT); /* enable interrupts */
1370 return 0;
1371 }
1372
1373 static int atmel_close(struct net_device *dev)
1374 {
1375 struct atmel_private *priv = netdev_priv(dev);
1376
1377 /* Send event to userspace that we are disassociating */
1378 if (priv->station_state == STATION_STATE_READY) {
1379 union iwreq_data wrqu;
1380
1381 wrqu.data.length = 0;
1382 wrqu.data.flags = 0;
1383 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
1384 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
1385 wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
1386 }
1387
1388 atmel_enter_state(priv, STATION_STATE_DOWN);
1389
1390 if (priv->bus_type == BUS_TYPE_PCCARD)
1391 atmel_write16(dev, GCR, 0x0060);
1392 atmel_write16(dev, GCR, 0x0040);
1393 return 0;
1394 }
1395
1396 static int atmel_validate_channel(struct atmel_private *priv, int channel)
1397 {
1398 /* check that channel is OK, if so return zero,
1399 else return suitable default channel */
1400 int i;
1401
1402 for (i = 0; i < ARRAY_SIZE(channel_table); i++)
1403 if (priv->reg_domain == channel_table[i].reg_domain) {
1404 if (channel >= channel_table[i].min &&
1405 channel <= channel_table[i].max)
1406 return 0;
1407 else
1408 return channel_table[i].min;
1409 }
1410 return 0;
1411 }
1412
1413 static int atmel_proc_output (char *buf, struct atmel_private *priv)
1414 {
1415 int i;
1416 char *p = buf;
1417 char *s, *r, *c;
1418
1419 p += sprintf(p, "Driver version:\t\t%d.%d\n",
1420 DRIVER_MAJOR, DRIVER_MINOR);
1421
1422 if (priv->station_state != STATION_STATE_DOWN) {
1423 p += sprintf(p, "Firmware version:\t%d.%d build %d\n"
1424 "Firmware location:\t",
1425 priv->host_info.major_version,
1426 priv->host_info.minor_version,
1427 priv->host_info.build_version);
1428
1429 if (priv->card_type != CARD_TYPE_EEPROM)
1430 p += sprintf(p, "on card\n");
1431 else if (priv->firmware)
1432 p += sprintf(p, "%s loaded by host\n",
1433 priv->firmware_id);
1434 else
1435 p += sprintf(p, "%s loaded by hotplug\n",
1436 priv->firmware_id);
1437
1438 switch (priv->card_type) {
1439 case CARD_TYPE_PARALLEL_FLASH:
1440 c = "Parallel flash";
1441 break;
1442 case CARD_TYPE_SPI_FLASH:
1443 c = "SPI flash\n";
1444 break;
1445 case CARD_TYPE_EEPROM:
1446 c = "EEPROM";
1447 break;
1448 default:
1449 c = "<unknown>";
1450 }
1451
1452 r = "<unknown>";
1453 for (i = 0; i < ARRAY_SIZE(channel_table); i++)
1454 if (priv->reg_domain == channel_table[i].reg_domain)
1455 r = channel_table[i].name;
1456
1457 p += sprintf(p, "MAC memory type:\t%s\n", c);
1458 p += sprintf(p, "Regulatory domain:\t%s\n", r);
1459 p += sprintf(p, "Host CRC checking:\t%s\n",
1460 priv->do_rx_crc ? "On" : "Off");
1461 p += sprintf(p, "WPA-capable firmware:\t%s\n",
1462 priv->use_wpa ? "Yes" : "No");
1463 }
1464
1465 switch (priv->station_state) {
1466 case STATION_STATE_SCANNING:
1467 s = "Scanning";
1468 break;
1469 case STATION_STATE_JOINNING:
1470 s = "Joining";
1471 break;
1472 case STATION_STATE_AUTHENTICATING:
1473 s = "Authenticating";
1474 break;
1475 case STATION_STATE_ASSOCIATING:
1476 s = "Associating";
1477 break;
1478 case STATION_STATE_READY:
1479 s = "Ready";
1480 break;
1481 case STATION_STATE_REASSOCIATING:
1482 s = "Reassociating";
1483 break;
1484 case STATION_STATE_MGMT_ERROR:
1485 s = "Management error";
1486 break;
1487 case STATION_STATE_DOWN:
1488 s = "Down";
1489 break;
1490 default:
1491 s = "<unknown>";
1492 }
1493
1494 p += sprintf(p, "Current state:\t\t%s\n", s);
1495 return p - buf;
1496 }
1497
1498 static int atmel_read_proc(char *page, char **start, off_t off,
1499 int count, int *eof, void *data)
1500 {
1501 struct atmel_private *priv = data;
1502 int len = atmel_proc_output (page, priv);
1503 if (len <= off+count)
1504 *eof = 1;
1505 *start = page + off;
1506 len -= off;
1507 if (len > count)
1508 len = count;
1509 if (len < 0)
1510 len = 0;
1511 return len;
1512 }
1513
1514 static const struct net_device_ops atmel_netdev_ops = {
1515 .ndo_open = atmel_open,
1516 .ndo_stop = atmel_close,
1517 .ndo_change_mtu = atmel_change_mtu,
1518 .ndo_set_mac_address = atmel_set_mac_address,
1519 .ndo_start_xmit = start_tx,
1520 .ndo_do_ioctl = atmel_ioctl,
1521 .ndo_validate_addr = eth_validate_addr,
1522 };
1523
1524 struct net_device *init_atmel_card(unsigned short irq, unsigned long port,
1525 const AtmelFWType fw_type,
1526 struct device *sys_dev,
1527 int (*card_present)(void *), void *card)
1528 {
1529 struct proc_dir_entry *ent;
1530 struct net_device *dev;
1531 struct atmel_private *priv;
1532 int rc;
1533
1534 /* Create the network device object. */
1535 dev = alloc_etherdev(sizeof(*priv));
1536 if (!dev) {
1537 printk(KERN_ERR "atmel: Couldn't alloc_etherdev\n");
1538 return NULL;
1539 }
1540 if (dev_alloc_name(dev, dev->name) < 0) {
1541 printk(KERN_ERR "atmel: Couldn't get name!\n");
1542 goto err_out_free;
1543 }
1544
1545 priv = netdev_priv(dev);
1546 priv->dev = dev;
1547 priv->sys_dev = sys_dev;
1548 priv->present_callback = card_present;
1549 priv->card = card;
1550 priv->firmware = NULL;
1551 priv->firmware_id[0] = '\0';
1552 priv->firmware_type = fw_type;
1553 if (firmware) /* module parameter */
1554 strcpy(priv->firmware_id, firmware);
1555 priv->bus_type = card_present ? BUS_TYPE_PCCARD : BUS_TYPE_PCI;
1556 priv->station_state = STATION_STATE_DOWN;
1557 priv->do_rx_crc = 0;
1558 /* For PCMCIA cards, some chips need CRC, some don't
1559 so we have to probe. */
1560 if (priv->bus_type == BUS_TYPE_PCCARD) {
1561 priv->probe_crc = 1;
1562 priv->crc_ok_cnt = priv->crc_ko_cnt = 0;
1563 } else
1564 priv->probe_crc = 0;
1565 priv->last_qual = jiffies;
1566 priv->last_beacon_timestamp = 0;
1567 memset(priv->frag_source, 0xff, sizeof(priv->frag_source));
1568 memset(priv->BSSID, 0, 6);
1569 priv->CurrentBSSID[0] = 0xFF; /* Initialize to something invalid.... */
1570 priv->station_was_associated = 0;
1571
1572 priv->last_survey = jiffies;
1573 priv->preamble = LONG_PREAMBLE;
1574 priv->operating_mode = IW_MODE_INFRA;
1575 priv->connect_to_any_BSS = 0;
1576 priv->config_reg_domain = 0;
1577 priv->reg_domain = 0;
1578 priv->tx_rate = 3;
1579 priv->auto_tx_rate = 1;
1580 priv->channel = 4;
1581 priv->power_mode = 0;
1582 priv->SSID[0] = '\0';
1583 priv->SSID_size = 0;
1584 priv->new_SSID_size = 0;
1585 priv->frag_threshold = 2346;
1586 priv->rts_threshold = 2347;
1587 priv->short_retry = 7;
1588 priv->long_retry = 4;
1589
1590 priv->wep_is_on = 0;
1591 priv->default_key = 0;
1592 priv->encryption_level = 0;
1593 priv->exclude_unencrypted = 0;
1594 priv->group_cipher_suite = priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
1595 priv->use_wpa = 0;
1596 memset(priv->wep_keys, 0, sizeof(priv->wep_keys));
1597 memset(priv->wep_key_len, 0, sizeof(priv->wep_key_len));
1598
1599 priv->default_beacon_period = priv->beacon_period = 100;
1600 priv->listen_interval = 1;
1601
1602 init_timer(&priv->management_timer);
1603 spin_lock_init(&priv->irqlock);
1604 spin_lock_init(&priv->timerlock);
1605 priv->management_timer.function = atmel_management_timer;
1606 priv->management_timer.data = (unsigned long) dev;
1607
1608 dev->netdev_ops = &atmel_netdev_ops;
1609 dev->wireless_handlers = &atmel_handler_def;
1610 dev->irq = irq;
1611 dev->base_addr = port;
1612
1613 SET_NETDEV_DEV(dev, sys_dev);
1614
1615 if ((rc = request_irq(dev->irq, service_interrupt, IRQF_SHARED, dev->name, dev))) {
1616 printk(KERN_ERR "%s: register interrupt %d failed, rc %d\n", dev->name, irq, rc);
1617 goto err_out_free;
1618 }
1619
1620 if (!request_region(dev->base_addr, 32,
1621 priv->bus_type == BUS_TYPE_PCCARD ? "atmel_cs" : "atmel_pci")) {
1622 goto err_out_irq;
1623 }
1624
1625 if (register_netdev(dev))
1626 goto err_out_res;
1627
1628 if (!probe_atmel_card(dev)) {
1629 unregister_netdev(dev);
1630 goto err_out_res;
1631 }
1632
1633 netif_carrier_off(dev);
1634
1635 ent = create_proc_read_entry ("driver/atmel", 0, NULL, atmel_read_proc, priv);
1636 if (!ent)
1637 printk(KERN_WARNING "atmel: unable to create /proc entry.\n");
1638
1639 printk(KERN_INFO "%s: Atmel at76c50x. Version %d.%d. MAC %pM\n",
1640 dev->name, DRIVER_MAJOR, DRIVER_MINOR, dev->dev_addr);
1641
1642 return dev;
1643
1644 err_out_res:
1645 release_region(dev->base_addr, 32);
1646 err_out_irq:
1647 free_irq(dev->irq, dev);
1648 err_out_free:
1649 free_netdev(dev);
1650 return NULL;
1651 }
1652
1653 EXPORT_SYMBOL(init_atmel_card);
1654
1655 void stop_atmel_card(struct net_device *dev)
1656 {
1657 struct atmel_private *priv = netdev_priv(dev);
1658
1659 /* put a brick on it... */
1660 if (priv->bus_type == BUS_TYPE_PCCARD)
1661 atmel_write16(dev, GCR, 0x0060);
1662 atmel_write16(dev, GCR, 0x0040);
1663
1664 del_timer_sync(&priv->management_timer);
1665 unregister_netdev(dev);
1666 remove_proc_entry("driver/atmel", NULL);
1667 free_irq(dev->irq, dev);
1668 kfree(priv->firmware);
1669 release_region(dev->base_addr, 32);
1670 free_netdev(dev);
1671 }
1672
1673 EXPORT_SYMBOL(stop_atmel_card);
1674
1675 static int atmel_set_essid(struct net_device *dev,
1676 struct iw_request_info *info,
1677 struct iw_point *dwrq,
1678 char *extra)
1679 {
1680 struct atmel_private *priv = netdev_priv(dev);
1681
1682 /* Check if we asked for `any' */
1683 if (dwrq->flags == 0) {
1684 priv->connect_to_any_BSS = 1;
1685 } else {
1686 int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1687
1688 priv->connect_to_any_BSS = 0;
1689
1690 /* Check the size of the string */
1691 if (dwrq->length > MAX_SSID_LENGTH)
1692 return -E2BIG;
1693 if (index != 0)
1694 return -EINVAL;
1695
1696 memcpy(priv->new_SSID, extra, dwrq->length);
1697 priv->new_SSID_size = dwrq->length;
1698 }
1699
1700 return -EINPROGRESS;
1701 }
1702
1703 static int atmel_get_essid(struct net_device *dev,
1704 struct iw_request_info *info,
1705 struct iw_point *dwrq,
1706 char *extra)
1707 {
1708 struct atmel_private *priv = netdev_priv(dev);
1709
1710 /* Get the current SSID */
1711 if (priv->new_SSID_size != 0) {
1712 memcpy(extra, priv->new_SSID, priv->new_SSID_size);
1713 dwrq->length = priv->new_SSID_size;
1714 } else {
1715 memcpy(extra, priv->SSID, priv->SSID_size);
1716 dwrq->length = priv->SSID_size;
1717 }
1718
1719 dwrq->flags = !priv->connect_to_any_BSS; /* active */
1720
1721 return 0;
1722 }
1723
1724 static int atmel_get_wap(struct net_device *dev,
1725 struct iw_request_info *info,
1726 struct sockaddr *awrq,
1727 char *extra)
1728 {
1729 struct atmel_private *priv = netdev_priv(dev);
1730 memcpy(awrq->sa_data, priv->CurrentBSSID, 6);
1731 awrq->sa_family = ARPHRD_ETHER;
1732
1733 return 0;
1734 }
1735
1736 static int atmel_set_encode(struct net_device *dev,
1737 struct iw_request_info *info,
1738 struct iw_point *dwrq,
1739 char *extra)
1740 {
1741 struct atmel_private *priv = netdev_priv(dev);
1742
1743 /* Basic checking: do we have a key to set ?
1744 * Note : with the new API, it's impossible to get a NULL pointer.
1745 * Therefore, we need to check a key size == 0 instead.
1746 * New version of iwconfig properly set the IW_ENCODE_NOKEY flag
1747 * when no key is present (only change flags), but older versions
1748 * don't do it. - Jean II */
1749 if (dwrq->length > 0) {
1750 int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1751 int current_index = priv->default_key;
1752 /* Check the size of the key */
1753 if (dwrq->length > 13) {
1754 return -EINVAL;
1755 }
1756 /* Check the index (none -> use current) */
1757 if (index < 0 || index >= 4)
1758 index = current_index;
1759 else
1760 priv->default_key = index;
1761 /* Set the length */
1762 if (dwrq->length > 5)
1763 priv->wep_key_len[index] = 13;
1764 else
1765 if (dwrq->length > 0)
1766 priv->wep_key_len[index] = 5;
1767 else
1768 /* Disable the key */
1769 priv->wep_key_len[index] = 0;
1770 /* Check if the key is not marked as invalid */
1771 if (!(dwrq->flags & IW_ENCODE_NOKEY)) {
1772 /* Cleanup */
1773 memset(priv->wep_keys[index], 0, 13);
1774 /* Copy the key in the driver */
1775 memcpy(priv->wep_keys[index], extra, dwrq->length);
1776 }
1777 /* WE specify that if a valid key is set, encryption
1778 * should be enabled (user may turn it off later)
1779 * This is also how "iwconfig ethX key on" works */
1780 if (index == current_index &&
1781 priv->wep_key_len[index] > 0) {
1782 priv->wep_is_on = 1;
1783 priv->exclude_unencrypted = 1;
1784 if (priv->wep_key_len[index] > 5) {
1785 priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
1786 priv->encryption_level = 2;
1787 } else {
1788 priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
1789 priv->encryption_level = 1;
1790 }
1791 }
1792 } else {
1793 /* Do we want to just set the transmit key index ? */
1794 int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1795 if (index >= 0 && index < 4) {
1796 priv->default_key = index;
1797 } else
1798 /* Don't complain if only change the mode */
1799 if (!(dwrq->flags & IW_ENCODE_MODE))
1800 return -EINVAL;
1801 }
1802 /* Read the flags */
1803 if (dwrq->flags & IW_ENCODE_DISABLED) {
1804 priv->wep_is_on = 0;
1805 priv->encryption_level = 0;
1806 priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
1807 } else {
1808 priv->wep_is_on = 1;
1809 if (priv->wep_key_len[priv->default_key] > 5) {
1810 priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
1811 priv->encryption_level = 2;
1812 } else {
1813 priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
1814 priv->encryption_level = 1;
1815 }
1816 }
1817 if (dwrq->flags & IW_ENCODE_RESTRICTED)
1818 priv->exclude_unencrypted = 1;
1819 if (dwrq->flags & IW_ENCODE_OPEN)
1820 priv->exclude_unencrypted = 0;
1821
1822 return -EINPROGRESS; /* Call commit handler */
1823 }
1824
1825 static int atmel_get_encode(struct net_device *dev,
1826 struct iw_request_info *info,
1827 struct iw_point *dwrq,
1828 char *extra)
1829 {
1830 struct atmel_private *priv = netdev_priv(dev);
1831 int index = (dwrq->flags & IW_ENCODE_INDEX) - 1;
1832
1833 if (!priv->wep_is_on)
1834 dwrq->flags = IW_ENCODE_DISABLED;
1835 else {
1836 if (priv->exclude_unencrypted)
1837 dwrq->flags = IW_ENCODE_RESTRICTED;
1838 else
1839 dwrq->flags = IW_ENCODE_OPEN;
1840 }
1841 /* Which key do we want ? -1 -> tx index */
1842 if (index < 0 || index >= 4)
1843 index = priv->default_key;
1844 dwrq->flags |= index + 1;
1845 /* Copy the key to the user buffer */
1846 dwrq->length = priv->wep_key_len[index];
1847 if (dwrq->length > 16) {
1848 dwrq->length = 0;
1849 } else {
1850 memset(extra, 0, 16);
1851 memcpy(extra, priv->wep_keys[index], dwrq->length);
1852 }
1853
1854 return 0;
1855 }
1856
1857 static int atmel_set_encodeext(struct net_device *dev,
1858 struct iw_request_info *info,
1859 union iwreq_data *wrqu,
1860 char *extra)
1861 {
1862 struct atmel_private *priv = netdev_priv(dev);
1863 struct iw_point *encoding = &wrqu->encoding;
1864 struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
1865 int idx, key_len, alg = ext->alg, set_key = 1;
1866
1867 /* Determine and validate the key index */
1868 idx = encoding->flags & IW_ENCODE_INDEX;
1869 if (idx) {
1870 if (idx < 1 || idx > 4)
1871 return -EINVAL;
1872 idx--;
1873 } else
1874 idx = priv->default_key;
1875
1876 if (encoding->flags & IW_ENCODE_DISABLED)
1877 alg = IW_ENCODE_ALG_NONE;
1878
1879 if (ext->ext_flags & IW_ENCODE_EXT_SET_TX_KEY) {
1880 priv->default_key = idx;
1881 set_key = ext->key_len > 0 ? 1 : 0;
1882 }
1883
1884 if (set_key) {
1885 /* Set the requested key first */
1886 switch (alg) {
1887 case IW_ENCODE_ALG_NONE:
1888 priv->wep_is_on = 0;
1889 priv->encryption_level = 0;
1890 priv->pairwise_cipher_suite = CIPHER_SUITE_NONE;
1891 break;
1892 case IW_ENCODE_ALG_WEP:
1893 if (ext->key_len > 5) {
1894 priv->wep_key_len[idx] = 13;
1895 priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_128;
1896 priv->encryption_level = 2;
1897 } else if (ext->key_len > 0) {
1898 priv->wep_key_len[idx] = 5;
1899 priv->pairwise_cipher_suite = CIPHER_SUITE_WEP_64;
1900 priv->encryption_level = 1;
1901 } else {
1902 return -EINVAL;
1903 }
1904 priv->wep_is_on = 1;
1905 memset(priv->wep_keys[idx], 0, 13);
1906 key_len = min ((int)ext->key_len, priv->wep_key_len[idx]);
1907 memcpy(priv->wep_keys[idx], ext->key, key_len);
1908 break;
1909 default:
1910 return -EINVAL;
1911 }
1912 }
1913
1914 return -EINPROGRESS;
1915 }
1916
1917 static int atmel_get_encodeext(struct net_device *dev,
1918 struct iw_request_info *info,
1919 union iwreq_data *wrqu,
1920 char *extra)
1921 {
1922 struct atmel_private *priv = netdev_priv(dev);
1923 struct iw_point *encoding = &wrqu->encoding;
1924 struct iw_encode_ext *ext = (struct iw_encode_ext *)extra;
1925 int idx, max_key_len;
1926
1927 max_key_len = encoding->length - sizeof(*ext);
1928 if (max_key_len < 0)
1929 return -EINVAL;
1930
1931 idx = encoding->flags & IW_ENCODE_INDEX;
1932 if (idx) {
1933 if (idx < 1 || idx > 4)
1934 return -EINVAL;
1935 idx--;
1936 } else
1937 idx = priv->default_key;
1938
1939 encoding->flags = idx + 1;
1940 memset(ext, 0, sizeof(*ext));
1941
1942 if (!priv->wep_is_on) {
1943 ext->alg = IW_ENCODE_ALG_NONE;
1944 ext->key_len = 0;
1945 encoding->flags |= IW_ENCODE_DISABLED;
1946 } else {
1947 if (priv->encryption_level > 0)
1948 ext->alg = IW_ENCODE_ALG_WEP;
1949 else
1950 return -EINVAL;
1951
1952 ext->key_len = priv->wep_key_len[idx];
1953 memcpy(ext->key, priv->wep_keys[idx], ext->key_len);
1954 encoding->flags |= IW_ENCODE_ENABLED;
1955 }
1956
1957 return 0;
1958 }
1959
1960 static int atmel_set_auth(struct net_device *dev,
1961 struct iw_request_info *info,
1962 union iwreq_data *wrqu, char *extra)
1963 {
1964 struct atmel_private *priv = netdev_priv(dev);
1965 struct iw_param *param = &wrqu->param;
1966
1967 switch (param->flags & IW_AUTH_INDEX) {
1968 case IW_AUTH_WPA_VERSION:
1969 case IW_AUTH_CIPHER_PAIRWISE:
1970 case IW_AUTH_CIPHER_GROUP:
1971 case IW_AUTH_KEY_MGMT:
1972 case IW_AUTH_RX_UNENCRYPTED_EAPOL:
1973 case IW_AUTH_PRIVACY_INVOKED:
1974 /*
1975 * atmel does not use these parameters
1976 */
1977 break;
1978
1979 case IW_AUTH_DROP_UNENCRYPTED:
1980 priv->exclude_unencrypted = param->value ? 1 : 0;
1981 break;
1982
1983 case IW_AUTH_80211_AUTH_ALG: {
1984 if (param->value & IW_AUTH_ALG_SHARED_KEY) {
1985 priv->exclude_unencrypted = 1;
1986 } else if (param->value & IW_AUTH_ALG_OPEN_SYSTEM) {
1987 priv->exclude_unencrypted = 0;
1988 } else
1989 return -EINVAL;
1990 break;
1991 }
1992
1993 case IW_AUTH_WPA_ENABLED:
1994 /* Silently accept disable of WPA */
1995 if (param->value > 0)
1996 return -EOPNOTSUPP;
1997 break;
1998
1999 default:
2000 return -EOPNOTSUPP;
2001 }
2002 return -EINPROGRESS;
2003 }
2004
2005 static int atmel_get_auth(struct net_device *dev,
2006 struct iw_request_info *info,
2007 union iwreq_data *wrqu, char *extra)
2008 {
2009 struct atmel_private *priv = netdev_priv(dev);
2010 struct iw_param *param = &wrqu->param;
2011
2012 switch (param->flags & IW_AUTH_INDEX) {
2013 case IW_AUTH_DROP_UNENCRYPTED:
2014 param->value = priv->exclude_unencrypted;
2015 break;
2016
2017 case IW_AUTH_80211_AUTH_ALG:
2018 if (priv->exclude_unencrypted == 1)
2019 param->value = IW_AUTH_ALG_SHARED_KEY;
2020 else
2021 param->value = IW_AUTH_ALG_OPEN_SYSTEM;
2022 break;
2023
2024 case IW_AUTH_WPA_ENABLED:
2025 param->value = 0;
2026 break;
2027
2028 default:
2029 return -EOPNOTSUPP;
2030 }
2031 return 0;
2032 }
2033
2034
2035 static int atmel_get_name(struct net_device *dev,
2036 struct iw_request_info *info,
2037 char *cwrq,
2038 char *extra)
2039 {
2040 strcpy(cwrq, "IEEE 802.11-DS");
2041 return 0;
2042 }
2043
2044 static int atmel_set_rate(struct net_device *dev,
2045 struct iw_request_info *info,
2046 struct iw_param *vwrq,
2047 char *extra)
2048 {
2049 struct atmel_private *priv = netdev_priv(dev);
2050
2051 if (vwrq->fixed == 0) {
2052 priv->tx_rate = 3;
2053 priv->auto_tx_rate = 1;
2054 } else {
2055 priv->auto_tx_rate = 0;
2056
2057 /* Which type of value ? */
2058 if ((vwrq->value < 4) && (vwrq->value >= 0)) {
2059 /* Setting by rate index */
2060 priv->tx_rate = vwrq->value;
2061 } else {
2062 /* Setting by frequency value */
2063 switch (vwrq->value) {
2064 case 1000000:
2065 priv->tx_rate = 0;
2066 break;
2067 case 2000000:
2068 priv->tx_rate = 1;
2069 break;
2070 case 5500000:
2071 priv->tx_rate = 2;
2072 break;
2073 case 11000000:
2074 priv->tx_rate = 3;
2075 break;
2076 default:
2077 return -EINVAL;
2078 }
2079 }
2080 }
2081
2082 return -EINPROGRESS;
2083 }
2084
2085 static int atmel_set_mode(struct net_device *dev,
2086 struct iw_request_info *info,
2087 __u32 *uwrq,
2088 char *extra)
2089 {
2090 struct atmel_private *priv = netdev_priv(dev);
2091
2092 if (*uwrq != IW_MODE_ADHOC && *uwrq != IW_MODE_INFRA)
2093 return -EINVAL;
2094
2095 priv->operating_mode = *uwrq;
2096 return -EINPROGRESS;
2097 }
2098
2099 static int atmel_get_mode(struct net_device *dev,
2100 struct iw_request_info *info,
2101 __u32 *uwrq,
2102 char *extra)
2103 {
2104 struct atmel_private *priv = netdev_priv(dev);
2105
2106 *uwrq = priv->operating_mode;
2107 return 0;
2108 }
2109
2110 static int atmel_get_rate(struct net_device *dev,
2111 struct iw_request_info *info,
2112 struct iw_param *vwrq,
2113 char *extra)
2114 {
2115 struct atmel_private *priv = netdev_priv(dev);
2116
2117 if (priv->auto_tx_rate) {
2118 vwrq->fixed = 0;
2119 vwrq->value = 11000000;
2120 } else {
2121 vwrq->fixed = 1;
2122 switch (priv->tx_rate) {
2123 case 0:
2124 vwrq->value = 1000000;
2125 break;
2126 case 1:
2127 vwrq->value = 2000000;
2128 break;
2129 case 2:
2130 vwrq->value = 5500000;
2131 break;
2132 case 3:
2133 vwrq->value = 11000000;
2134 break;
2135 }
2136 }
2137 return 0;
2138 }
2139
2140 static int atmel_set_power(struct net_device *dev,
2141 struct iw_request_info *info,
2142 struct iw_param *vwrq,
2143 char *extra)
2144 {
2145 struct atmel_private *priv = netdev_priv(dev);
2146 priv->power_mode = vwrq->disabled ? 0 : 1;
2147 return -EINPROGRESS;
2148 }
2149
2150 static int atmel_get_power(struct net_device *dev,
2151 struct iw_request_info *info,
2152 struct iw_param *vwrq,
2153 char *extra)
2154 {
2155 struct atmel_private *priv = netdev_priv(dev);
2156 vwrq->disabled = priv->power_mode ? 0 : 1;
2157 vwrq->flags = IW_POWER_ON;
2158 return 0;
2159 }
2160
2161 static int atmel_set_retry(struct net_device *dev,
2162 struct iw_request_info *info,
2163 struct iw_param *vwrq,
2164 char *extra)
2165 {
2166 struct atmel_private *priv = netdev_priv(dev);
2167
2168 if (!vwrq->disabled && (vwrq->flags & IW_RETRY_LIMIT)) {
2169 if (vwrq->flags & IW_RETRY_LONG)
2170 priv->long_retry = vwrq->value;
2171 else if (vwrq->flags & IW_RETRY_SHORT)
2172 priv->short_retry = vwrq->value;
2173 else {
2174 /* No modifier : set both */
2175 priv->long_retry = vwrq->value;
2176 priv->short_retry = vwrq->value;
2177 }
2178 return -EINPROGRESS;
2179 }
2180
2181 return -EINVAL;
2182 }
2183
2184 static int atmel_get_retry(struct net_device *dev,
2185 struct iw_request_info *info,
2186 struct iw_param *vwrq,
2187 char *extra)
2188 {
2189 struct atmel_private *priv = netdev_priv(dev);
2190
2191 vwrq->disabled = 0; /* Can't be disabled */
2192
2193 /* Note : by default, display the short retry number */
2194 if (vwrq->flags & IW_RETRY_LONG) {
2195 vwrq->flags = IW_RETRY_LIMIT | IW_RETRY_LONG;
2196 vwrq->value = priv->long_retry;
2197 } else {
2198 vwrq->flags = IW_RETRY_LIMIT;
2199 vwrq->value = priv->short_retry;
2200 if (priv->long_retry != priv->short_retry)
2201 vwrq->flags |= IW_RETRY_SHORT;
2202 }
2203
2204 return 0;
2205 }
2206
2207 static int atmel_set_rts(struct net_device *dev,
2208 struct iw_request_info *info,
2209 struct iw_param *vwrq,
2210 char *extra)
2211 {
2212 struct atmel_private *priv = netdev_priv(dev);
2213 int rthr = vwrq->value;
2214
2215 if (vwrq->disabled)
2216 rthr = 2347;
2217 if ((rthr < 0) || (rthr > 2347)) {
2218 return -EINVAL;
2219 }
2220 priv->rts_threshold = rthr;
2221
2222 return -EINPROGRESS; /* Call commit handler */
2223 }
2224
2225 static int atmel_get_rts(struct net_device *dev,
2226 struct iw_request_info *info,
2227 struct iw_param *vwrq,
2228 char *extra)
2229 {
2230 struct atmel_private *priv = netdev_priv(dev);
2231
2232 vwrq->value = priv->rts_threshold;
2233 vwrq->disabled = (vwrq->value >= 2347);
2234 vwrq->fixed = 1;
2235
2236 return 0;
2237 }
2238
2239 static int atmel_set_frag(struct net_device *dev,
2240 struct iw_request_info *info,
2241 struct iw_param *vwrq,
2242 char *extra)
2243 {
2244 struct atmel_private *priv = netdev_priv(dev);
2245 int fthr = vwrq->value;
2246
2247 if (vwrq->disabled)
2248 fthr = 2346;
2249 if ((fthr < 256) || (fthr > 2346)) {
2250 return -EINVAL;
2251 }
2252 fthr &= ~0x1; /* Get an even value - is it really needed ??? */
2253 priv->frag_threshold = fthr;
2254
2255 return -EINPROGRESS; /* Call commit handler */
2256 }
2257
2258 static int atmel_get_frag(struct net_device *dev,
2259 struct iw_request_info *info,
2260 struct iw_param *vwrq,
2261 char *extra)
2262 {
2263 struct atmel_private *priv = netdev_priv(dev);
2264
2265 vwrq->value = priv->frag_threshold;
2266 vwrq->disabled = (vwrq->value >= 2346);
2267 vwrq->fixed = 1;
2268
2269 return 0;
2270 }
2271
2272 static int atmel_set_freq(struct net_device *dev,
2273 struct iw_request_info *info,
2274 struct iw_freq *fwrq,
2275 char *extra)
2276 {
2277 struct atmel_private *priv = netdev_priv(dev);
2278 int rc = -EINPROGRESS; /* Call commit handler */
2279
2280 /* If setting by frequency, convert to a channel */
2281 if (fwrq->e == 1) {
2282 int f = fwrq->m / 100000;
2283
2284 /* Hack to fall through... */
2285 fwrq->e = 0;
2286 fwrq->m = ieee80211_freq_to_dsss_chan(f);
2287 }
2288 /* Setting by channel number */
2289 if ((fwrq->m > 1000) || (fwrq->e > 0))
2290 rc = -EOPNOTSUPP;
2291 else {
2292 int channel = fwrq->m;
2293 if (atmel_validate_channel(priv, channel) == 0) {
2294 priv->channel = channel;
2295 } else {
2296 rc = -EINVAL;
2297 }
2298 }
2299 return rc;
2300 }
2301
2302 static int atmel_get_freq(struct net_device *dev,
2303 struct iw_request_info *info,
2304 struct iw_freq *fwrq,
2305 char *extra)
2306 {
2307 struct atmel_private *priv = netdev_priv(dev);
2308
2309 fwrq->m = priv->channel;
2310 fwrq->e = 0;
2311 return 0;
2312 }
2313
2314 static int atmel_set_scan(struct net_device *dev,
2315 struct iw_request_info *info,
2316 struct iw_point *dwrq,
2317 char *extra)
2318 {
2319 struct atmel_private *priv = netdev_priv(dev);
2320 unsigned long flags;
2321
2322 /* Note : you may have realised that, as this is a SET operation,
2323 * this is privileged and therefore a normal user can't
2324 * perform scanning.
2325 * This is not an error, while the device perform scanning,
2326 * traffic doesn't flow, so it's a perfect DoS...
2327 * Jean II */
2328
2329 if (priv->station_state == STATION_STATE_DOWN)
2330 return -EAGAIN;
2331
2332 /* Timeout old surveys. */
2333 if (time_after(jiffies, priv->last_survey + 20 * HZ))
2334 priv->site_survey_state = SITE_SURVEY_IDLE;
2335 priv->last_survey = jiffies;
2336
2337 /* Initiate a scan command */
2338 if (priv->site_survey_state == SITE_SURVEY_IN_PROGRESS)
2339 return -EBUSY;
2340
2341 del_timer_sync(&priv->management_timer);
2342 spin_lock_irqsave(&priv->irqlock, flags);
2343
2344 priv->site_survey_state = SITE_SURVEY_IN_PROGRESS;
2345 priv->fast_scan = 0;
2346 atmel_scan(priv, 0);
2347 spin_unlock_irqrestore(&priv->irqlock, flags);
2348
2349 return 0;
2350 }
2351
2352 static int atmel_get_scan(struct net_device *dev,
2353 struct iw_request_info *info,
2354 struct iw_point *dwrq,
2355 char *extra)
2356 {
2357 struct atmel_private *priv = netdev_priv(dev);
2358 int i;
2359 char *current_ev = extra;
2360 struct iw_event iwe;
2361
2362 if (priv->site_survey_state != SITE_SURVEY_COMPLETED)
2363 return -EAGAIN;
2364
2365 for (i = 0; i < priv->BSS_list_entries; i++) {
2366 iwe.cmd = SIOCGIWAP;
2367 iwe.u.ap_addr.sa_family = ARPHRD_ETHER;
2368 memcpy(iwe.u.ap_addr.sa_data, priv->BSSinfo[i].BSSID, 6);
2369 current_ev = iwe_stream_add_event(info, current_ev,
2370 extra + IW_SCAN_MAX_DATA,
2371 &iwe, IW_EV_ADDR_LEN);
2372
2373 iwe.u.data.length = priv->BSSinfo[i].SSIDsize;
2374 if (iwe.u.data.length > 32)
2375 iwe.u.data.length = 32;
2376 iwe.cmd = SIOCGIWESSID;
2377 iwe.u.data.flags = 1;
2378 current_ev = iwe_stream_add_point(info, current_ev,
2379 extra + IW_SCAN_MAX_DATA,
2380 &iwe, priv->BSSinfo[i].SSID);
2381
2382 iwe.cmd = SIOCGIWMODE;
2383 iwe.u.mode = priv->BSSinfo[i].BSStype;
2384 current_ev = iwe_stream_add_event(info, current_ev,
2385 extra + IW_SCAN_MAX_DATA,
2386 &iwe, IW_EV_UINT_LEN);
2387
2388 iwe.cmd = SIOCGIWFREQ;
2389 iwe.u.freq.m = priv->BSSinfo[i].channel;
2390 iwe.u.freq.e = 0;
2391 current_ev = iwe_stream_add_event(info, current_ev,
2392 extra + IW_SCAN_MAX_DATA,
2393 &iwe, IW_EV_FREQ_LEN);
2394
2395 /* Add quality statistics */
2396 iwe.cmd = IWEVQUAL;
2397 iwe.u.qual.level = priv->BSSinfo[i].RSSI;
2398 iwe.u.qual.qual = iwe.u.qual.level;
2399 /* iwe.u.qual.noise = SOMETHING */
2400 current_ev = iwe_stream_add_event(info, current_ev,
2401 extra + IW_SCAN_MAX_DATA,
2402 &iwe, IW_EV_QUAL_LEN);
2403
2404
2405 iwe.cmd = SIOCGIWENCODE;
2406 if (priv->BSSinfo[i].UsingWEP)
2407 iwe.u.data.flags = IW_ENCODE_ENABLED | IW_ENCODE_NOKEY;
2408 else
2409 iwe.u.data.flags = IW_ENCODE_DISABLED;
2410 iwe.u.data.length = 0;
2411 current_ev = iwe_stream_add_point(info, current_ev,
2412 extra + IW_SCAN_MAX_DATA,
2413 &iwe, NULL);
2414 }
2415
2416 /* Length of data */
2417 dwrq->length = (current_ev - extra);
2418 dwrq->flags = 0;
2419
2420 return 0;
2421 }
2422
2423 static int atmel_get_range(struct net_device *dev,
2424 struct iw_request_info *info,
2425 struct iw_point *dwrq,
2426 char *extra)
2427 {
2428 struct atmel_private *priv = netdev_priv(dev);
2429 struct iw_range *range = (struct iw_range *) extra;
2430 int k, i, j;
2431
2432 dwrq->length = sizeof(struct iw_range);
2433 memset(range, 0, sizeof(struct iw_range));
2434 range->min_nwid = 0x0000;
2435 range->max_nwid = 0x0000;
2436 range->num_channels = 0;
2437 for (j = 0; j < ARRAY_SIZE(channel_table); j++)
2438 if (priv->reg_domain == channel_table[j].reg_domain) {
2439 range->num_channels = channel_table[j].max - channel_table[j].min + 1;
2440 break;
2441 }
2442 if (range->num_channels != 0) {
2443 for (k = 0, i = channel_table[j].min; i <= channel_table[j].max; i++) {
2444 range->freq[k].i = i; /* List index */
2445
2446 /* Values in MHz -> * 10^5 * 10 */
2447 range->freq[k].m = (ieee80211_dsss_chan_to_freq(i) *
2448 100000);
2449 range->freq[k++].e = 1;
2450 }
2451 range->num_frequency = k;
2452 }
2453
2454 range->max_qual.qual = 100;
2455 range->max_qual.level = 100;
2456 range->max_qual.noise = 0;
2457 range->max_qual.updated = IW_QUAL_NOISE_INVALID;
2458
2459 range->avg_qual.qual = 50;
2460 range->avg_qual.level = 50;
2461 range->avg_qual.noise = 0;
2462 range->avg_qual.updated = IW_QUAL_NOISE_INVALID;
2463
2464 range->sensitivity = 0;
2465
2466 range->bitrate[0] = 1000000;
2467 range->bitrate[1] = 2000000;
2468 range->bitrate[2] = 5500000;
2469 range->bitrate[3] = 11000000;
2470 range->num_bitrates = 4;
2471
2472 range->min_rts = 0;
2473 range->max_rts = 2347;
2474 range->min_frag = 256;
2475 range->max_frag = 2346;
2476
2477 range->encoding_size[0] = 5;
2478 range->encoding_size[1] = 13;
2479 range->num_encoding_sizes = 2;
2480 range->max_encoding_tokens = 4;
2481
2482 range->pmp_flags = IW_POWER_ON;
2483 range->pmt_flags = IW_POWER_ON;
2484 range->pm_capa = 0;
2485
2486 range->we_version_source = WIRELESS_EXT;
2487 range->we_version_compiled = WIRELESS_EXT;
2488 range->retry_capa = IW_RETRY_LIMIT ;
2489 range->retry_flags = IW_RETRY_LIMIT;
2490 range->r_time_flags = 0;
2491 range->min_retry = 1;
2492 range->max_retry = 65535;
2493
2494 return 0;
2495 }
2496
2497 static int atmel_set_wap(struct net_device *dev,
2498 struct iw_request_info *info,
2499 struct sockaddr *awrq,
2500 char *extra)
2501 {
2502 struct atmel_private *priv = netdev_priv(dev);
2503 int i;
2504 static const u8 any[] = { 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF };
2505 static const u8 off[] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
2506 unsigned long flags;
2507
2508 if (awrq->sa_family != ARPHRD_ETHER)
2509 return -EINVAL;
2510
2511 if (!memcmp(any, awrq->sa_data, 6) ||
2512 !memcmp(off, awrq->sa_data, 6)) {
2513 del_timer_sync(&priv->management_timer);
2514 spin_lock_irqsave(&priv->irqlock, flags);
2515 atmel_scan(priv, 1);
2516 spin_unlock_irqrestore(&priv->irqlock, flags);
2517 return 0;
2518 }
2519
2520 for (i = 0; i < priv->BSS_list_entries; i++) {
2521 if (memcmp(priv->BSSinfo[i].BSSID, awrq->sa_data, 6) == 0) {
2522 if (!priv->wep_is_on && priv->BSSinfo[i].UsingWEP) {
2523 return -EINVAL;
2524 } else if (priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) {
2525 return -EINVAL;
2526 } else {
2527 del_timer_sync(&priv->management_timer);
2528 spin_lock_irqsave(&priv->irqlock, flags);
2529 atmel_join_bss(priv, i);
2530 spin_unlock_irqrestore(&priv->irqlock, flags);
2531 return 0;
2532 }
2533 }
2534 }
2535
2536 return -EINVAL;
2537 }
2538
2539 static int atmel_config_commit(struct net_device *dev,
2540 struct iw_request_info *info, /* NULL */
2541 void *zwrq, /* NULL */
2542 char *extra) /* NULL */
2543 {
2544 return atmel_open(dev);
2545 }
2546
2547 static const iw_handler atmel_handler[] =
2548 {
2549 (iw_handler) atmel_config_commit, /* SIOCSIWCOMMIT */
2550 (iw_handler) atmel_get_name, /* SIOCGIWNAME */
2551 (iw_handler) NULL, /* SIOCSIWNWID */
2552 (iw_handler) NULL, /* SIOCGIWNWID */
2553 (iw_handler) atmel_set_freq, /* SIOCSIWFREQ */
2554 (iw_handler) atmel_get_freq, /* SIOCGIWFREQ */
2555 (iw_handler) atmel_set_mode, /* SIOCSIWMODE */
2556 (iw_handler) atmel_get_mode, /* SIOCGIWMODE */
2557 (iw_handler) NULL, /* SIOCSIWSENS */
2558 (iw_handler) NULL, /* SIOCGIWSENS */
2559 (iw_handler) NULL, /* SIOCSIWRANGE */
2560 (iw_handler) atmel_get_range, /* SIOCGIWRANGE */
2561 (iw_handler) NULL, /* SIOCSIWPRIV */
2562 (iw_handler) NULL, /* SIOCGIWPRIV */
2563 (iw_handler) NULL, /* SIOCSIWSTATS */
2564 (iw_handler) NULL, /* SIOCGIWSTATS */
2565 (iw_handler) NULL, /* SIOCSIWSPY */
2566 (iw_handler) NULL, /* SIOCGIWSPY */
2567 (iw_handler) NULL, /* -- hole -- */
2568 (iw_handler) NULL, /* -- hole -- */
2569 (iw_handler) atmel_set_wap, /* SIOCSIWAP */
2570 (iw_handler) atmel_get_wap, /* SIOCGIWAP */
2571 (iw_handler) NULL, /* -- hole -- */
2572 (iw_handler) NULL, /* SIOCGIWAPLIST */
2573 (iw_handler) atmel_set_scan, /* SIOCSIWSCAN */
2574 (iw_handler) atmel_get_scan, /* SIOCGIWSCAN */
2575 (iw_handler) atmel_set_essid, /* SIOCSIWESSID */
2576 (iw_handler) atmel_get_essid, /* SIOCGIWESSID */
2577 (iw_handler) NULL, /* SIOCSIWNICKN */
2578 (iw_handler) NULL, /* SIOCGIWNICKN */
2579 (iw_handler) NULL, /* -- hole -- */
2580 (iw_handler) NULL, /* -- hole -- */
2581 (iw_handler) atmel_set_rate, /* SIOCSIWRATE */
2582 (iw_handler) atmel_get_rate, /* SIOCGIWRATE */
2583 (iw_handler) atmel_set_rts, /* SIOCSIWRTS */
2584 (iw_handler) atmel_get_rts, /* SIOCGIWRTS */
2585 (iw_handler) atmel_set_frag, /* SIOCSIWFRAG */
2586 (iw_handler) atmel_get_frag, /* SIOCGIWFRAG */
2587 (iw_handler) NULL, /* SIOCSIWTXPOW */
2588 (iw_handler) NULL, /* SIOCGIWTXPOW */
2589 (iw_handler) atmel_set_retry, /* SIOCSIWRETRY */
2590 (iw_handler) atmel_get_retry, /* SIOCGIWRETRY */
2591 (iw_handler) atmel_set_encode, /* SIOCSIWENCODE */
2592 (iw_handler) atmel_get_encode, /* SIOCGIWENCODE */
2593 (iw_handler) atmel_set_power, /* SIOCSIWPOWER */
2594 (iw_handler) atmel_get_power, /* SIOCGIWPOWER */
2595 (iw_handler) NULL, /* -- hole -- */
2596 (iw_handler) NULL, /* -- hole -- */
2597 (iw_handler) NULL, /* SIOCSIWGENIE */
2598 (iw_handler) NULL, /* SIOCGIWGENIE */
2599 (iw_handler) atmel_set_auth, /* SIOCSIWAUTH */
2600 (iw_handler) atmel_get_auth, /* SIOCGIWAUTH */
2601 (iw_handler) atmel_set_encodeext, /* SIOCSIWENCODEEXT */
2602 (iw_handler) atmel_get_encodeext, /* SIOCGIWENCODEEXT */
2603 (iw_handler) NULL, /* SIOCSIWPMKSA */
2604 };
2605
2606 static const iw_handler atmel_private_handler[] =
2607 {
2608 NULL, /* SIOCIWFIRSTPRIV */
2609 };
2610
2611 typedef struct atmel_priv_ioctl {
2612 char id[32];
2613 unsigned char __user *data;
2614 unsigned short len;
2615 } atmel_priv_ioctl;
2616
2617 #define ATMELFWL SIOCIWFIRSTPRIV
2618 #define ATMELIDIFC ATMELFWL + 1
2619 #define ATMELRD ATMELFWL + 2
2620 #define ATMELMAGIC 0x51807
2621 #define REGDOMAINSZ 20
2622
2623 static const struct iw_priv_args atmel_private_args[] = {
2624 {
2625 .cmd = ATMELFWL,
2626 .set_args = IW_PRIV_TYPE_BYTE
2627 | IW_PRIV_SIZE_FIXED
2628 | sizeof (atmel_priv_ioctl),
2629 .get_args = IW_PRIV_TYPE_NONE,
2630 .name = "atmelfwl"
2631 }, {
2632 .cmd = ATMELIDIFC,
2633 .set_args = IW_PRIV_TYPE_NONE,
2634 .get_args = IW_PRIV_TYPE_INT | IW_PRIV_SIZE_FIXED | 1,
2635 .name = "atmelidifc"
2636 }, {
2637 .cmd = ATMELRD,
2638 .set_args = IW_PRIV_TYPE_CHAR | REGDOMAINSZ,
2639 .get_args = IW_PRIV_TYPE_NONE,
2640 .name = "regdomain"
2641 },
2642 };
2643
2644 static const struct iw_handler_def atmel_handler_def = {
2645 .num_standard = ARRAY_SIZE(atmel_handler),
2646 .num_private = ARRAY_SIZE(atmel_private_handler),
2647 .num_private_args = ARRAY_SIZE(atmel_private_args),
2648 .standard = (iw_handler *) atmel_handler,
2649 .private = (iw_handler *) atmel_private_handler,
2650 .private_args = (struct iw_priv_args *) atmel_private_args,
2651 .get_wireless_stats = atmel_get_wireless_stats
2652 };
2653
2654 static int atmel_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
2655 {
2656 int i, rc = 0;
2657 struct atmel_private *priv = netdev_priv(dev);
2658 atmel_priv_ioctl com;
2659 struct iwreq *wrq = (struct iwreq *) rq;
2660 unsigned char *new_firmware;
2661 char domain[REGDOMAINSZ + 1];
2662
2663 switch (cmd) {
2664 case ATMELIDIFC:
2665 wrq->u.param.value = ATMELMAGIC;
2666 break;
2667
2668 case ATMELFWL:
2669 if (copy_from_user(&com, rq->ifr_data, sizeof(com))) {
2670 rc = -EFAULT;
2671 break;
2672 }
2673
2674 if (!capable(CAP_NET_ADMIN)) {
2675 rc = -EPERM;
2676 break;
2677 }
2678
2679 if (!(new_firmware = kmalloc(com.len, GFP_KERNEL))) {
2680 rc = -ENOMEM;
2681 break;
2682 }
2683
2684 if (copy_from_user(new_firmware, com.data, com.len)) {
2685 kfree(new_firmware);
2686 rc = -EFAULT;
2687 break;
2688 }
2689
2690 kfree(priv->firmware);
2691
2692 priv->firmware = new_firmware;
2693 priv->firmware_length = com.len;
2694 strncpy(priv->firmware_id, com.id, 31);
2695 priv->firmware_id[31] = '\0';
2696 break;
2697
2698 case ATMELRD:
2699 if (copy_from_user(domain, rq->ifr_data, REGDOMAINSZ)) {
2700 rc = -EFAULT;
2701 break;
2702 }
2703
2704 if (!capable(CAP_NET_ADMIN)) {
2705 rc = -EPERM;
2706 break;
2707 }
2708
2709 domain[REGDOMAINSZ] = 0;
2710 rc = -EINVAL;
2711 for (i = 0; i < ARRAY_SIZE(channel_table); i++) {
2712 /* strcasecmp doesn't exist in the library */
2713 char *a = channel_table[i].name;
2714 char *b = domain;
2715 while (*a) {
2716 char c1 = *a++;
2717 char c2 = *b++;
2718 if (tolower(c1) != tolower(c2))
2719 break;
2720 }
2721 if (!*a && !*b) {
2722 priv->config_reg_domain = channel_table[i].reg_domain;
2723 rc = 0;
2724 }
2725 }
2726
2727 if (rc == 0 && priv->station_state != STATION_STATE_DOWN)
2728 rc = atmel_open(dev);
2729 break;
2730
2731 default:
2732 rc = -EOPNOTSUPP;
2733 }
2734
2735 return rc;
2736 }
2737
2738 struct auth_body {
2739 __le16 alg;
2740 __le16 trans_seq;
2741 __le16 status;
2742 u8 el_id;
2743 u8 chall_text_len;
2744 u8 chall_text[253];
2745 };
2746
2747 static void atmel_enter_state(struct atmel_private *priv, int new_state)
2748 {
2749 int old_state = priv->station_state;
2750
2751 if (new_state == old_state)
2752 return;
2753
2754 priv->station_state = new_state;
2755
2756 if (new_state == STATION_STATE_READY) {
2757 netif_start_queue(priv->dev);
2758 netif_carrier_on(priv->dev);
2759 }
2760
2761 if (old_state == STATION_STATE_READY) {
2762 netif_carrier_off(priv->dev);
2763 if (netif_running(priv->dev))
2764 netif_stop_queue(priv->dev);
2765 priv->last_beacon_timestamp = 0;
2766 }
2767 }
2768
2769 static void atmel_scan(struct atmel_private *priv, int specific_ssid)
2770 {
2771 struct {
2772 u8 BSSID[6];
2773 u8 SSID[MAX_SSID_LENGTH];
2774 u8 scan_type;
2775 u8 channel;
2776 __le16 BSS_type;
2777 __le16 min_channel_time;
2778 __le16 max_channel_time;
2779 u8 options;
2780 u8 SSID_size;
2781 } cmd;
2782
2783 memset(cmd.BSSID, 0xff, 6);
2784
2785 if (priv->fast_scan) {
2786 cmd.SSID_size = priv->SSID_size;
2787 memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
2788 cmd.min_channel_time = cpu_to_le16(10);
2789 cmd.max_channel_time = cpu_to_le16(50);
2790 } else {
2791 priv->BSS_list_entries = 0;
2792 cmd.SSID_size = 0;
2793 cmd.min_channel_time = cpu_to_le16(10);
2794 cmd.max_channel_time = cpu_to_le16(120);
2795 }
2796
2797 cmd.options = 0;
2798
2799 if (!specific_ssid)
2800 cmd.options |= SCAN_OPTIONS_SITE_SURVEY;
2801
2802 cmd.channel = (priv->channel & 0x7f);
2803 cmd.scan_type = SCAN_TYPE_ACTIVE;
2804 cmd.BSS_type = cpu_to_le16(priv->operating_mode == IW_MODE_ADHOC ?
2805 BSS_TYPE_AD_HOC : BSS_TYPE_INFRASTRUCTURE);
2806
2807 atmel_send_command(priv, CMD_Scan, &cmd, sizeof(cmd));
2808
2809 /* This must come after all hardware access to avoid being messed up
2810 by stuff happening in interrupt context after we leave STATE_DOWN */
2811 atmel_enter_state(priv, STATION_STATE_SCANNING);
2812 }
2813
2814 static void join(struct atmel_private *priv, int type)
2815 {
2816 struct {
2817 u8 BSSID[6];
2818 u8 SSID[MAX_SSID_LENGTH];
2819 u8 BSS_type; /* this is a short in a scan command - weird */
2820 u8 channel;
2821 __le16 timeout;
2822 u8 SSID_size;
2823 u8 reserved;
2824 } cmd;
2825
2826 cmd.SSID_size = priv->SSID_size;
2827 memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
2828 memcpy(cmd.BSSID, priv->CurrentBSSID, 6);
2829 cmd.channel = (priv->channel & 0x7f);
2830 cmd.BSS_type = type;
2831 cmd.timeout = cpu_to_le16(2000);
2832
2833 atmel_send_command(priv, CMD_Join, &cmd, sizeof(cmd));
2834 }
2835
2836 static void start(struct atmel_private *priv, int type)
2837 {
2838 struct {
2839 u8 BSSID[6];
2840 u8 SSID[MAX_SSID_LENGTH];
2841 u8 BSS_type;
2842 u8 channel;
2843 u8 SSID_size;
2844 u8 reserved[3];
2845 } cmd;
2846
2847 cmd.SSID_size = priv->SSID_size;
2848 memcpy(cmd.SSID, priv->SSID, priv->SSID_size);
2849 memcpy(cmd.BSSID, priv->BSSID, 6);
2850 cmd.BSS_type = type;
2851 cmd.channel = (priv->channel & 0x7f);
2852
2853 atmel_send_command(priv, CMD_Start, &cmd, sizeof(cmd));
2854 }
2855
2856 static void handle_beacon_probe(struct atmel_private *priv, u16 capability,
2857 u8 channel)
2858 {
2859 int rejoin = 0;
2860 int new = capability & WLAN_CAPABILITY_SHORT_PREAMBLE ?
2861 SHORT_PREAMBLE : LONG_PREAMBLE;
2862
2863 if (priv->preamble != new) {
2864 priv->preamble = new;
2865 rejoin = 1;
2866 atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, new);
2867 }
2868
2869 if (priv->channel != channel) {
2870 priv->channel = channel;
2871 rejoin = 1;
2872 atmel_set_mib8(priv, Phy_Mib_Type, PHY_MIB_CHANNEL_POS, channel);
2873 }
2874
2875 if (rejoin) {
2876 priv->station_is_associated = 0;
2877 atmel_enter_state(priv, STATION_STATE_JOINNING);
2878
2879 if (priv->operating_mode == IW_MODE_INFRA)
2880 join(priv, BSS_TYPE_INFRASTRUCTURE);
2881 else
2882 join(priv, BSS_TYPE_AD_HOC);
2883 }
2884 }
2885
2886 static void send_authentication_request(struct atmel_private *priv, u16 system,
2887 u8 *challenge, int challenge_len)
2888 {
2889 struct ieee80211_hdr header;
2890 struct auth_body auth;
2891
2892 header.frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_AUTH);
2893 header.duration_id = cpu_to_le16(0x8000);
2894 header.seq_ctrl = 0;
2895 memcpy(header.addr1, priv->CurrentBSSID, 6);
2896 memcpy(header.addr2, priv->dev->dev_addr, 6);
2897 memcpy(header.addr3, priv->CurrentBSSID, 6);
2898
2899 if (priv->wep_is_on && priv->CurrentAuthentTransactionSeqNum != 1)
2900 /* no WEP for authentication frames with TrSeqNo 1 */
2901 header.frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
2902
2903 auth.alg = cpu_to_le16(system);
2904
2905 auth.status = 0;
2906 auth.trans_seq = cpu_to_le16(priv->CurrentAuthentTransactionSeqNum);
2907 priv->ExpectedAuthentTransactionSeqNum = priv->CurrentAuthentTransactionSeqNum+1;
2908 priv->CurrentAuthentTransactionSeqNum += 2;
2909
2910 if (challenge_len != 0) {
2911 auth.el_id = 16; /* challenge_text */
2912 auth.chall_text_len = challenge_len;
2913 memcpy(auth.chall_text, challenge, challenge_len);
2914 atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 8 + challenge_len);
2915 } else {
2916 atmel_transmit_management_frame(priv, &header, (u8 *)&auth, 6);
2917 }
2918 }
2919
2920 static void send_association_request(struct atmel_private *priv, int is_reassoc)
2921 {
2922 u8 *ssid_el_p;
2923 int bodysize;
2924 struct ieee80211_hdr header;
2925 struct ass_req_format {
2926 __le16 capability;
2927 __le16 listen_interval;
2928 u8 ap[6]; /* nothing after here directly accessible */
2929 u8 ssid_el_id;
2930 u8 ssid_len;
2931 u8 ssid[MAX_SSID_LENGTH];
2932 u8 sup_rates_el_id;
2933 u8 sup_rates_len;
2934 u8 rates[4];
2935 } body;
2936
2937 header.frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2938 (is_reassoc ? IEEE80211_STYPE_REASSOC_REQ : IEEE80211_STYPE_ASSOC_REQ));
2939 header.duration_id = cpu_to_le16(0x8000);
2940 header.seq_ctrl = 0;
2941
2942 memcpy(header.addr1, priv->CurrentBSSID, 6);
2943 memcpy(header.addr2, priv->dev->dev_addr, 6);
2944 memcpy(header.addr3, priv->CurrentBSSID, 6);
2945
2946 body.capability = cpu_to_le16(WLAN_CAPABILITY_ESS);
2947 if (priv->wep_is_on)
2948 body.capability |= cpu_to_le16(WLAN_CAPABILITY_PRIVACY);
2949 if (priv->preamble == SHORT_PREAMBLE)
2950 body.capability |= cpu_to_le16(WLAN_CAPABILITY_SHORT_PREAMBLE);
2951
2952 body.listen_interval = cpu_to_le16(priv->listen_interval * priv->beacon_period);
2953
2954 /* current AP address - only in reassoc frame */
2955 if (is_reassoc) {
2956 memcpy(body.ap, priv->CurrentBSSID, 6);
2957 ssid_el_p = (u8 *)&body.ssid_el_id;
2958 bodysize = 18 + priv->SSID_size;
2959 } else {
2960 ssid_el_p = (u8 *)&body.ap[0];
2961 bodysize = 12 + priv->SSID_size;
2962 }
2963
2964 ssid_el_p[0] = WLAN_EID_SSID;
2965 ssid_el_p[1] = priv->SSID_size;
2966 memcpy(ssid_el_p + 2, priv->SSID, priv->SSID_size);
2967 ssid_el_p[2 + priv->SSID_size] = WLAN_EID_SUPP_RATES;
2968 ssid_el_p[3 + priv->SSID_size] = 4; /* len of suported rates */
2969 memcpy(ssid_el_p + 4 + priv->SSID_size, atmel_basic_rates, 4);
2970
2971 atmel_transmit_management_frame(priv, &header, (void *)&body, bodysize);
2972 }
2973
2974 static int is_frame_from_current_bss(struct atmel_private *priv,
2975 struct ieee80211_hdr *header)
2976 {
2977 if (le16_to_cpu(header->frame_control) & IEEE80211_FCTL_FROMDS)
2978 return memcmp(header->addr3, priv->CurrentBSSID, 6) == 0;
2979 else
2980 return memcmp(header->addr2, priv->CurrentBSSID, 6) == 0;
2981 }
2982
2983 static int retrieve_bss(struct atmel_private *priv)
2984 {
2985 int i;
2986 int max_rssi = -128;
2987 int max_index = -1;
2988
2989 if (priv->BSS_list_entries == 0)
2990 return -1;
2991
2992 if (priv->connect_to_any_BSS) {
2993 /* Select a BSS with the max-RSSI but of the same type and of
2994 the same WEP mode and that it is not marked as 'bad' (i.e.
2995 we had previously failed to connect to this BSS with the
2996 settings that we currently use) */
2997 priv->current_BSS = 0;
2998 for (i = 0; i < priv->BSS_list_entries; i++) {
2999 if (priv->operating_mode == priv->BSSinfo[i].BSStype &&
3000 ((!priv->wep_is_on && !priv->BSSinfo[i].UsingWEP) ||
3001 (priv->wep_is_on && priv->BSSinfo[i].UsingWEP)) &&
3002 !(priv->BSSinfo[i].channel & 0x80)) {
3003 max_rssi = priv->BSSinfo[i].RSSI;
3004 priv->current_BSS = max_index = i;
3005 }
3006 }
3007 return max_index;
3008 }
3009
3010 for (i = 0; i < priv->BSS_list_entries; i++) {
3011 if (priv->SSID_size == priv->BSSinfo[i].SSIDsize &&
3012 memcmp(priv->SSID, priv->BSSinfo[i].SSID, priv->SSID_size) == 0 &&
3013 priv->operating_mode == priv->BSSinfo[i].BSStype &&
3014 atmel_validate_channel(priv, priv->BSSinfo[i].channel) == 0) {
3015 if (priv->BSSinfo[i].RSSI >= max_rssi) {
3016 max_rssi = priv->BSSinfo[i].RSSI;
3017 max_index = i;
3018 }
3019 }
3020 }
3021 return max_index;
3022 }
3023
3024 static void store_bss_info(struct atmel_private *priv,
3025 struct ieee80211_hdr *header, u16 capability,
3026 u16 beacon_period, u8 channel, u8 rssi, u8 ssid_len,
3027 u8 *ssid, int is_beacon)
3028 {
3029 u8 *bss = capability & WLAN_CAPABILITY_ESS ? header->addr2 : header->addr3;
3030 int i, index;
3031
3032 for (index = -1, i = 0; i < priv->BSS_list_entries; i++)
3033 if (memcmp(bss, priv->BSSinfo[i].BSSID, 6) == 0)
3034 index = i;
3035
3036 /* If we process a probe and an entry from this BSS exists
3037 we will update the BSS entry with the info from this BSS.
3038 If we process a beacon we will only update RSSI */
3039
3040 if (index == -1) {
3041 if (priv->BSS_list_entries == MAX_BSS_ENTRIES)
3042 return;
3043 index = priv->BSS_list_entries++;
3044 memcpy(priv->BSSinfo[index].BSSID, bss, 6);
3045 priv->BSSinfo[index].RSSI = rssi;
3046 } else {
3047 if (rssi > priv->BSSinfo[index].RSSI)
3048 priv->BSSinfo[index].RSSI = rssi;
3049 if (is_beacon)
3050 return;
3051 }
3052
3053 priv->BSSinfo[index].channel = channel;
3054 priv->BSSinfo[index].beacon_period = beacon_period;
3055 priv->BSSinfo[index].UsingWEP = capability & WLAN_CAPABILITY_PRIVACY;
3056 memcpy(priv->BSSinfo[index].SSID, ssid, ssid_len);
3057 priv->BSSinfo[index].SSIDsize = ssid_len;
3058
3059 if (capability & WLAN_CAPABILITY_IBSS)
3060 priv->BSSinfo[index].BSStype = IW_MODE_ADHOC;
3061 else if (capability & WLAN_CAPABILITY_ESS)
3062 priv->BSSinfo[index].BSStype = IW_MODE_INFRA;
3063
3064 priv->BSSinfo[index].preamble = capability & WLAN_CAPABILITY_SHORT_PREAMBLE ?
3065 SHORT_PREAMBLE : LONG_PREAMBLE;
3066 }
3067
3068 static void authenticate(struct atmel_private *priv, u16 frame_len)
3069 {
3070 struct auth_body *auth = (struct auth_body *)priv->rx_buf;
3071 u16 status = le16_to_cpu(auth->status);
3072 u16 trans_seq_no = le16_to_cpu(auth->trans_seq);
3073 u16 system = le16_to_cpu(auth->alg);
3074
3075 if (status == WLAN_STATUS_SUCCESS && !priv->wep_is_on) {
3076 /* no WEP */
3077 if (priv->station_was_associated) {
3078 atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
3079 send_association_request(priv, 1);
3080 return;
3081 } else {
3082 atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
3083 send_association_request(priv, 0);
3084 return;
3085 }
3086 }
3087
3088 if (status == WLAN_STATUS_SUCCESS && priv->wep_is_on) {
3089 int should_associate = 0;
3090 /* WEP */
3091 if (trans_seq_no != priv->ExpectedAuthentTransactionSeqNum)
3092 return;
3093
3094 if (system == WLAN_AUTH_OPEN) {
3095 if (trans_seq_no == 0x0002) {
3096 should_associate = 1;
3097 }
3098 } else if (system == WLAN_AUTH_SHARED_KEY) {
3099 if (trans_seq_no == 0x0002 &&
3100 auth->el_id == WLAN_EID_CHALLENGE) {
3101 send_authentication_request(priv, system, auth->chall_text, auth->chall_text_len);
3102 return;
3103 } else if (trans_seq_no == 0x0004) {
3104 should_associate = 1;
3105 }
3106 }
3107
3108 if (should_associate) {
3109 if (priv->station_was_associated) {
3110 atmel_enter_state(priv, STATION_STATE_REASSOCIATING);
3111 send_association_request(priv, 1);
3112 return;
3113 } else {
3114 atmel_enter_state(priv, STATION_STATE_ASSOCIATING);
3115 send_association_request(priv, 0);
3116 return;
3117 }
3118 }
3119 }
3120
3121 if (status == WLAN_STATUS_NOT_SUPPORTED_AUTH_ALG) {
3122 /* Flip back and forth between WEP auth modes until the max
3123 * authentication tries has been exceeded.
3124 */
3125 if (system == WLAN_AUTH_OPEN) {
3126 priv->CurrentAuthentTransactionSeqNum = 0x001;
3127 priv->exclude_unencrypted = 1;
3128 send_authentication_request(priv, WLAN_AUTH_SHARED_KEY, NULL, 0);
3129 return;
3130 } else if (system == WLAN_AUTH_SHARED_KEY
3131 && priv->wep_is_on) {
3132 priv->CurrentAuthentTransactionSeqNum = 0x001;
3133 priv->exclude_unencrypted = 0;
3134 send_authentication_request(priv, WLAN_AUTH_OPEN, NULL, 0);
3135 return;
3136 } else if (priv->connect_to_any_BSS) {
3137 int bss_index;
3138
3139 priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
3140
3141 if ((bss_index = retrieve_bss(priv)) != -1) {
3142 atmel_join_bss(priv, bss_index);
3143 return;
3144 }
3145 }
3146 }
3147
3148 priv->AuthenticationRequestRetryCnt = 0;
3149 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3150 priv->station_is_associated = 0;
3151 }
3152
3153 static void associate(struct atmel_private *priv, u16 frame_len, u16 subtype)
3154 {
3155 struct ass_resp_format {
3156 __le16 capability;
3157 __le16 status;
3158 __le16 ass_id;
3159 u8 el_id;
3160 u8 length;
3161 u8 rates[4];
3162 } *ass_resp = (struct ass_resp_format *)priv->rx_buf;
3163
3164 u16 status = le16_to_cpu(ass_resp->status);
3165 u16 ass_id = le16_to_cpu(ass_resp->ass_id);
3166 u16 rates_len = ass_resp->length > 4 ? 4 : ass_resp->length;
3167
3168 union iwreq_data wrqu;
3169
3170 if (frame_len < 8 + rates_len)
3171 return;
3172
3173 if (status == WLAN_STATUS_SUCCESS) {
3174 if (subtype == IEEE80211_STYPE_ASSOC_RESP)
3175 priv->AssociationRequestRetryCnt = 0;
3176 else
3177 priv->ReAssociationRequestRetryCnt = 0;
3178
3179 atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3180 MAC_MGMT_MIB_STATION_ID_POS, ass_id & 0x3fff);
3181 atmel_set_mib(priv, Phy_Mib_Type,
3182 PHY_MIB_RATE_SET_POS, ass_resp->rates, rates_len);
3183 if (priv->power_mode == 0) {
3184 priv->listen_interval = 1;
3185 atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
3186 MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
3187 atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3188 MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
3189 } else {
3190 priv->listen_interval = 2;
3191 atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
3192 MAC_MGMT_MIB_PS_MODE_POS, PS_MODE);
3193 atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3194 MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 2);
3195 }
3196
3197 priv->station_is_associated = 1;
3198 priv->station_was_associated = 1;
3199 atmel_enter_state(priv, STATION_STATE_READY);
3200
3201 /* Send association event to userspace */
3202 wrqu.data.length = 0;
3203 wrqu.data.flags = 0;
3204 memcpy(wrqu.ap_addr.sa_data, priv->CurrentBSSID, ETH_ALEN);
3205 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
3206 wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
3207
3208 return;
3209 }
3210
3211 if (subtype == IEEE80211_STYPE_ASSOC_RESP &&
3212 status != WLAN_STATUS_ASSOC_DENIED_RATES &&
3213 status != WLAN_STATUS_CAPS_UNSUPPORTED &&
3214 priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
3215 mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3216 priv->AssociationRequestRetryCnt++;
3217 send_association_request(priv, 0);
3218 return;
3219 }
3220
3221 if (subtype == IEEE80211_STYPE_REASSOC_RESP &&
3222 status != WLAN_STATUS_ASSOC_DENIED_RATES &&
3223 status != WLAN_STATUS_CAPS_UNSUPPORTED &&
3224 priv->AssociationRequestRetryCnt < MAX_ASSOCIATION_RETRIES) {
3225 mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3226 priv->ReAssociationRequestRetryCnt++;
3227 send_association_request(priv, 1);
3228 return;
3229 }
3230
3231 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3232 priv->station_is_associated = 0;
3233
3234 if (priv->connect_to_any_BSS) {
3235 int bss_index;
3236 priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
3237
3238 if ((bss_index = retrieve_bss(priv)) != -1)
3239 atmel_join_bss(priv, bss_index);
3240 }
3241 }
3242
3243 static void atmel_join_bss(struct atmel_private *priv, int bss_index)
3244 {
3245 struct bss_info *bss = &priv->BSSinfo[bss_index];
3246
3247 memcpy(priv->CurrentBSSID, bss->BSSID, 6);
3248 memcpy(priv->SSID, bss->SSID, priv->SSID_size = bss->SSIDsize);
3249
3250 /* The WPA stuff cares about the current AP address */
3251 if (priv->use_wpa)
3252 build_wpa_mib(priv);
3253
3254 /* When switching to AdHoc turn OFF Power Save if needed */
3255
3256 if (bss->BSStype == IW_MODE_ADHOC &&
3257 priv->operating_mode != IW_MODE_ADHOC &&
3258 priv->power_mode) {
3259 priv->power_mode = 0;
3260 priv->listen_interval = 1;
3261 atmel_set_mib8(priv, Mac_Mgmt_Mib_Type,
3262 MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
3263 atmel_set_mib16(priv, Mac_Mgmt_Mib_Type,
3264 MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
3265 }
3266
3267 priv->operating_mode = bss->BSStype;
3268 priv->channel = bss->channel & 0x7f;
3269 priv->beacon_period = bss->beacon_period;
3270
3271 if (priv->preamble != bss->preamble) {
3272 priv->preamble = bss->preamble;
3273 atmel_set_mib8(priv, Local_Mib_Type,
3274 LOCAL_MIB_PREAMBLE_TYPE, bss->preamble);
3275 }
3276
3277 if (!priv->wep_is_on && bss->UsingWEP) {
3278 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3279 priv->station_is_associated = 0;
3280 return;
3281 }
3282
3283 if (priv->wep_is_on && !bss->UsingWEP) {
3284 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3285 priv->station_is_associated = 0;
3286 return;
3287 }
3288
3289 atmel_enter_state(priv, STATION_STATE_JOINNING);
3290
3291 if (priv->operating_mode == IW_MODE_INFRA)
3292 join(priv, BSS_TYPE_INFRASTRUCTURE);
3293 else
3294 join(priv, BSS_TYPE_AD_HOC);
3295 }
3296
3297 static void restart_search(struct atmel_private *priv)
3298 {
3299 int bss_index;
3300
3301 if (!priv->connect_to_any_BSS) {
3302 atmel_scan(priv, 1);
3303 } else {
3304 priv->BSSinfo[(int)(priv->current_BSS)].channel |= 0x80;
3305
3306 if ((bss_index = retrieve_bss(priv)) != -1)
3307 atmel_join_bss(priv, bss_index);
3308 else
3309 atmel_scan(priv, 0);
3310 }
3311 }
3312
3313 static void smooth_rssi(struct atmel_private *priv, u8 rssi)
3314 {
3315 u8 old = priv->wstats.qual.level;
3316 u8 max_rssi = 42; /* 502-rmfd-revd max by experiment, default for now */
3317
3318 switch (priv->firmware_type) {
3319 case ATMEL_FW_TYPE_502E:
3320 max_rssi = 63; /* 502-rmfd-reve max by experiment */
3321 break;
3322 default:
3323 break;
3324 }
3325
3326 rssi = rssi * 100 / max_rssi;
3327 if ((rssi + old) % 2)
3328 priv->wstats.qual.level = (rssi + old) / 2 + 1;
3329 else
3330 priv->wstats.qual.level = (rssi + old) / 2;
3331 priv->wstats.qual.updated |= IW_QUAL_LEVEL_UPDATED;
3332 priv->wstats.qual.updated &= ~IW_QUAL_LEVEL_INVALID;
3333 }
3334
3335 static void atmel_smooth_qual(struct atmel_private *priv)
3336 {
3337 unsigned long time_diff = (jiffies - priv->last_qual) / HZ;
3338 while (time_diff--) {
3339 priv->last_qual += HZ;
3340 priv->wstats.qual.qual = priv->wstats.qual.qual / 2;
3341 priv->wstats.qual.qual +=
3342 priv->beacons_this_sec * priv->beacon_period * (priv->wstats.qual.level + 100) / 4000;
3343 priv->beacons_this_sec = 0;
3344 }
3345 priv->wstats.qual.updated |= IW_QUAL_QUAL_UPDATED;
3346 priv->wstats.qual.updated &= ~IW_QUAL_QUAL_INVALID;
3347 }
3348
3349 /* deals with incoming management frames. */
3350 static void atmel_management_frame(struct atmel_private *priv,
3351 struct ieee80211_hdr *header,
3352 u16 frame_len, u8 rssi)
3353 {
3354 u16 subtype;
3355
3356 subtype = le16_to_cpu(header->frame_control) & IEEE80211_FCTL_STYPE;
3357 switch (subtype) {
3358 case IEEE80211_STYPE_BEACON:
3359 case IEEE80211_STYPE_PROBE_RESP:
3360
3361 /* beacon frame has multiple variable-length fields -
3362 never let an engineer loose with a data structure design. */
3363 {
3364 struct beacon_format {
3365 __le64 timestamp;
3366 __le16 interval;
3367 __le16 capability;
3368 u8 ssid_el_id;
3369 u8 ssid_length;
3370 /* ssid here */
3371 u8 rates_el_id;
3372 u8 rates_length;
3373 /* rates here */
3374 u8 ds_el_id;
3375 u8 ds_length;
3376 /* ds here */
3377 } *beacon = (struct beacon_format *)priv->rx_buf;
3378
3379 u8 channel, rates_length, ssid_length;
3380 u64 timestamp = le64_to_cpu(beacon->timestamp);
3381 u16 beacon_interval = le16_to_cpu(beacon->interval);
3382 u16 capability = le16_to_cpu(beacon->capability);
3383 u8 *beaconp = priv->rx_buf;
3384 ssid_length = beacon->ssid_length;
3385 /* this blows chunks. */
3386 if (frame_len < 14 || frame_len < ssid_length + 15)
3387 return;
3388 rates_length = beaconp[beacon->ssid_length + 15];
3389 if (frame_len < ssid_length + rates_length + 18)
3390 return;
3391 if (ssid_length > MAX_SSID_LENGTH)
3392 return;
3393 channel = beaconp[ssid_length + rates_length + 18];
3394
3395 if (priv->station_state == STATION_STATE_READY) {
3396 smooth_rssi(priv, rssi);
3397 if (is_frame_from_current_bss(priv, header)) {
3398 priv->beacons_this_sec++;
3399 atmel_smooth_qual(priv);
3400 if (priv->last_beacon_timestamp) {
3401 /* Note truncate this to 32 bits - kernel can't divide a long long */
3402 u32 beacon_delay = timestamp - priv->last_beacon_timestamp;
3403 int beacons = beacon_delay / (beacon_interval * 1000);
3404 if (beacons > 1)
3405 priv->wstats.miss.beacon += beacons - 1;
3406 }
3407 priv->last_beacon_timestamp = timestamp;
3408 handle_beacon_probe(priv, capability, channel);
3409 }
3410 }
3411
3412 if (priv->station_state == STATION_STATE_SCANNING)
3413 store_bss_info(priv, header, capability,
3414 beacon_interval, channel, rssi,
3415 ssid_length,
3416 &beacon->rates_el_id,
3417 subtype == IEEE80211_STYPE_BEACON);
3418 }
3419 break;
3420
3421 case IEEE80211_STYPE_AUTH:
3422
3423 if (priv->station_state == STATION_STATE_AUTHENTICATING)
3424 authenticate(priv, frame_len);
3425
3426 break;
3427
3428 case IEEE80211_STYPE_ASSOC_RESP:
3429 case IEEE80211_STYPE_REASSOC_RESP:
3430
3431 if (priv->station_state == STATION_STATE_ASSOCIATING ||
3432 priv->station_state == STATION_STATE_REASSOCIATING)
3433 associate(priv, frame_len, subtype);
3434
3435 break;
3436
3437 case IEEE80211_STYPE_DISASSOC:
3438 if (priv->station_is_associated &&
3439 priv->operating_mode == IW_MODE_INFRA &&
3440 is_frame_from_current_bss(priv, header)) {
3441 priv->station_was_associated = 0;
3442 priv->station_is_associated = 0;
3443
3444 atmel_enter_state(priv, STATION_STATE_JOINNING);
3445 join(priv, BSS_TYPE_INFRASTRUCTURE);
3446 }
3447
3448 break;
3449
3450 case IEEE80211_STYPE_DEAUTH:
3451 if (priv->operating_mode == IW_MODE_INFRA &&
3452 is_frame_from_current_bss(priv, header)) {
3453 priv->station_was_associated = 0;
3454
3455 atmel_enter_state(priv, STATION_STATE_JOINNING);
3456 join(priv, BSS_TYPE_INFRASTRUCTURE);
3457 }
3458
3459 break;
3460 }
3461 }
3462
3463 /* run when timer expires */
3464 static void atmel_management_timer(u_long a)
3465 {
3466 struct net_device *dev = (struct net_device *) a;
3467 struct atmel_private *priv = netdev_priv(dev);
3468 unsigned long flags;
3469
3470 /* Check if the card has been yanked. */
3471 if (priv->card && priv->present_callback &&
3472 !(*priv->present_callback)(priv->card))
3473 return;
3474
3475 spin_lock_irqsave(&priv->irqlock, flags);
3476
3477 switch (priv->station_state) {
3478
3479 case STATION_STATE_AUTHENTICATING:
3480 if (priv->AuthenticationRequestRetryCnt >= MAX_AUTHENTICATION_RETRIES) {
3481 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3482 priv->station_is_associated = 0;
3483 priv->AuthenticationRequestRetryCnt = 0;
3484 restart_search(priv);
3485 } else {
3486 int auth = WLAN_AUTH_OPEN;
3487 priv->AuthenticationRequestRetryCnt++;
3488 priv->CurrentAuthentTransactionSeqNum = 0x0001;
3489 mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3490 if (priv->wep_is_on && priv->exclude_unencrypted)
3491 auth = WLAN_AUTH_SHARED_KEY;
3492 send_authentication_request(priv, auth, NULL, 0);
3493 }
3494 break;
3495
3496 case STATION_STATE_ASSOCIATING:
3497 if (priv->AssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
3498 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3499 priv->station_is_associated = 0;
3500 priv->AssociationRequestRetryCnt = 0;
3501 restart_search(priv);
3502 } else {
3503 priv->AssociationRequestRetryCnt++;
3504 mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3505 send_association_request(priv, 0);
3506 }
3507 break;
3508
3509 case STATION_STATE_REASSOCIATING:
3510 if (priv->ReAssociationRequestRetryCnt == MAX_ASSOCIATION_RETRIES) {
3511 atmel_enter_state(priv, STATION_STATE_MGMT_ERROR);
3512 priv->station_is_associated = 0;
3513 priv->ReAssociationRequestRetryCnt = 0;
3514 restart_search(priv);
3515 } else {
3516 priv->ReAssociationRequestRetryCnt++;
3517 mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3518 send_association_request(priv, 1);
3519 }
3520 break;
3521
3522 default:
3523 break;
3524 }
3525
3526 spin_unlock_irqrestore(&priv->irqlock, flags);
3527 }
3528
3529 static void atmel_command_irq(struct atmel_private *priv)
3530 {
3531 u8 status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
3532 u8 command = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET));
3533 int fast_scan;
3534 union iwreq_data wrqu;
3535
3536 if (status == CMD_STATUS_IDLE ||
3537 status == CMD_STATUS_IN_PROGRESS)
3538 return;
3539
3540 switch (command) {
3541 case CMD_Start:
3542 if (status == CMD_STATUS_COMPLETE) {
3543 priv->station_was_associated = priv->station_is_associated;
3544 atmel_get_mib(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_BSSID_POS,
3545 (u8 *)priv->CurrentBSSID, 6);
3546 atmel_enter_state(priv, STATION_STATE_READY);
3547 }
3548 break;
3549
3550 case CMD_Scan:
3551 fast_scan = priv->fast_scan;
3552 priv->fast_scan = 0;
3553
3554 if (status != CMD_STATUS_COMPLETE) {
3555 atmel_scan(priv, 1);
3556 } else {
3557 int bss_index = retrieve_bss(priv);
3558 int notify_scan_complete = 1;
3559 if (bss_index != -1) {
3560 atmel_join_bss(priv, bss_index);
3561 } else if (priv->operating_mode == IW_MODE_ADHOC &&
3562 priv->SSID_size != 0) {
3563 start(priv, BSS_TYPE_AD_HOC);
3564 } else {
3565 priv->fast_scan = !fast_scan;
3566 atmel_scan(priv, 1);
3567 notify_scan_complete = 0;
3568 }
3569 priv->site_survey_state = SITE_SURVEY_COMPLETED;
3570 if (notify_scan_complete) {
3571 wrqu.data.length = 0;
3572 wrqu.data.flags = 0;
3573 wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
3574 }
3575 }
3576 break;
3577
3578 case CMD_SiteSurvey:
3579 priv->fast_scan = 0;
3580
3581 if (status != CMD_STATUS_COMPLETE)
3582 return;
3583
3584 priv->site_survey_state = SITE_SURVEY_COMPLETED;
3585 if (priv->station_is_associated) {
3586 atmel_enter_state(priv, STATION_STATE_READY);
3587 wrqu.data.length = 0;
3588 wrqu.data.flags = 0;
3589 wireless_send_event(priv->dev, SIOCGIWSCAN, &wrqu, NULL);
3590 } else {
3591 atmel_scan(priv, 1);
3592 }
3593 break;
3594
3595 case CMD_Join:
3596 if (status == CMD_STATUS_COMPLETE) {
3597 if (priv->operating_mode == IW_MODE_ADHOC) {
3598 priv->station_was_associated = priv->station_is_associated;
3599 atmel_enter_state(priv, STATION_STATE_READY);
3600 } else {
3601 int auth = WLAN_AUTH_OPEN;
3602 priv->AuthenticationRequestRetryCnt = 0;
3603 atmel_enter_state(priv, STATION_STATE_AUTHENTICATING);
3604
3605 mod_timer(&priv->management_timer, jiffies + MGMT_JIFFIES);
3606 priv->CurrentAuthentTransactionSeqNum = 0x0001;
3607 if (priv->wep_is_on && priv->exclude_unencrypted)
3608 auth = WLAN_AUTH_SHARED_KEY;
3609 send_authentication_request(priv, auth, NULL, 0);
3610 }
3611 return;
3612 }
3613
3614 atmel_scan(priv, 1);
3615 }
3616 }
3617
3618 static int atmel_wakeup_firmware(struct atmel_private *priv)
3619 {
3620 struct host_info_struct *iface = &priv->host_info;
3621 u16 mr1, mr3;
3622 int i;
3623
3624 if (priv->card_type == CARD_TYPE_SPI_FLASH)
3625 atmel_set_gcr(priv->dev, GCR_REMAP);
3626
3627 /* wake up on-board processor */
3628 atmel_clear_gcr(priv->dev, 0x0040);
3629 atmel_write16(priv->dev, BSR, BSS_SRAM);
3630
3631 if (priv->card_type == CARD_TYPE_SPI_FLASH)
3632 mdelay(100);
3633
3634 /* and wait for it */
3635 for (i = LOOP_RETRY_LIMIT; i; i--) {
3636 mr1 = atmel_read16(priv->dev, MR1);
3637 mr3 = atmel_read16(priv->dev, MR3);
3638
3639 if (mr3 & MAC_BOOT_COMPLETE)
3640 break;
3641 if (mr1 & MAC_BOOT_COMPLETE &&
3642 priv->bus_type == BUS_TYPE_PCCARD)
3643 break;
3644 }
3645
3646 if (i == 0) {
3647 printk(KERN_ALERT "%s: MAC failed to boot.\n", priv->dev->name);
3648 return -EIO;
3649 }
3650
3651 if ((priv->host_info_base = atmel_read16(priv->dev, MR2)) == 0xffff) {
3652 printk(KERN_ALERT "%s: card missing.\n", priv->dev->name);
3653 return -ENODEV;
3654 }
3655
3656 /* now check for completion of MAC initialization through
3657 the FunCtrl field of the IFACE, poll MR1 to detect completion of
3658 MAC initialization, check completion status, set interrupt mask,
3659 enables interrupts and calls Tx and Rx initialization functions */
3660
3661 atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET), FUNC_CTRL_INIT_COMPLETE);
3662
3663 for (i = LOOP_RETRY_LIMIT; i; i--) {
3664 mr1 = atmel_read16(priv->dev, MR1);
3665 mr3 = atmel_read16(priv->dev, MR3);
3666
3667 if (mr3 & MAC_INIT_COMPLETE)
3668 break;
3669 if (mr1 & MAC_INIT_COMPLETE &&
3670 priv->bus_type == BUS_TYPE_PCCARD)
3671 break;
3672 }
3673
3674 if (i == 0) {
3675 printk(KERN_ALERT "%s: MAC failed to initialise.\n",
3676 priv->dev->name);
3677 return -EIO;
3678 }
3679
3680 /* Check for MAC_INIT_OK only on the register that the MAC_INIT_OK was set */
3681 if ((mr3 & MAC_INIT_COMPLETE) &&
3682 !(atmel_read16(priv->dev, MR3) & MAC_INIT_OK)) {
3683 printk(KERN_ALERT "%s: MAC failed MR3 self-test.\n", priv->dev->name);
3684 return -EIO;
3685 }
3686 if ((mr1 & MAC_INIT_COMPLETE) &&
3687 !(atmel_read16(priv->dev, MR1) & MAC_INIT_OK)) {
3688 printk(KERN_ALERT "%s: MAC failed MR1 self-test.\n", priv->dev->name);
3689 return -EIO;
3690 }
3691
3692 atmel_copy_to_host(priv->dev, (unsigned char *)iface,
3693 priv->host_info_base, sizeof(*iface));
3694
3695 iface->tx_buff_pos = le16_to_cpu(iface->tx_buff_pos);
3696 iface->tx_buff_size = le16_to_cpu(iface->tx_buff_size);
3697 iface->tx_desc_pos = le16_to_cpu(iface->tx_desc_pos);
3698 iface->tx_desc_count = le16_to_cpu(iface->tx_desc_count);
3699 iface->rx_buff_pos = le16_to_cpu(iface->rx_buff_pos);
3700 iface->rx_buff_size = le16_to_cpu(iface->rx_buff_size);
3701 iface->rx_desc_pos = le16_to_cpu(iface->rx_desc_pos);
3702 iface->rx_desc_count = le16_to_cpu(iface->rx_desc_count);
3703 iface->build_version = le16_to_cpu(iface->build_version);
3704 iface->command_pos = le16_to_cpu(iface->command_pos);
3705 iface->major_version = le16_to_cpu(iface->major_version);
3706 iface->minor_version = le16_to_cpu(iface->minor_version);
3707 iface->func_ctrl = le16_to_cpu(iface->func_ctrl);
3708 iface->mac_status = le16_to_cpu(iface->mac_status);
3709
3710 return 0;
3711 }
3712
3713 /* determine type of memory and MAC address */
3714 static int probe_atmel_card(struct net_device *dev)
3715 {
3716 int rc = 0;
3717 struct atmel_private *priv = netdev_priv(dev);
3718
3719 /* reset pccard */
3720 if (priv->bus_type == BUS_TYPE_PCCARD)
3721 atmel_write16(dev, GCR, 0x0060);
3722
3723 atmel_write16(dev, GCR, 0x0040);
3724 mdelay(500);
3725
3726 if (atmel_read16(dev, MR2) == 0) {
3727 /* No stored firmware so load a small stub which just
3728 tells us the MAC address */
3729 int i;
3730 priv->card_type = CARD_TYPE_EEPROM;
3731 atmel_write16(dev, BSR, BSS_IRAM);
3732 atmel_copy_to_card(dev, 0, mac_reader, sizeof(mac_reader));
3733 atmel_set_gcr(dev, GCR_REMAP);
3734 atmel_clear_gcr(priv->dev, 0x0040);
3735 atmel_write16(dev, BSR, BSS_SRAM);
3736 for (i = LOOP_RETRY_LIMIT; i; i--)
3737 if (atmel_read16(dev, MR3) & MAC_BOOT_COMPLETE)
3738 break;
3739 if (i == 0) {
3740 printk(KERN_ALERT "%s: MAC failed to boot MAC address reader.\n", dev->name);
3741 } else {
3742 atmel_copy_to_host(dev, dev->dev_addr, atmel_read16(dev, MR2), 6);
3743 /* got address, now squash it again until the network
3744 interface is opened */
3745 if (priv->bus_type == BUS_TYPE_PCCARD)
3746 atmel_write16(dev, GCR, 0x0060);
3747 atmel_write16(dev, GCR, 0x0040);
3748 rc = 1;
3749 }
3750 } else if (atmel_read16(dev, MR4) == 0) {
3751 /* Mac address easy in this case. */
3752 priv->card_type = CARD_TYPE_PARALLEL_FLASH;
3753 atmel_write16(dev, BSR, 1);
3754 atmel_copy_to_host(dev, dev->dev_addr, 0xc000, 6);
3755 atmel_write16(dev, BSR, 0x200);
3756 rc = 1;
3757 } else {
3758 /* Standard firmware in flash, boot it up and ask
3759 for the Mac Address */
3760 priv->card_type = CARD_TYPE_SPI_FLASH;
3761 if (atmel_wakeup_firmware(priv) == 0) {
3762 atmel_get_mib(priv, Mac_Address_Mib_Type, 0, dev->dev_addr, 6);
3763
3764 /* got address, now squash it again until the network
3765 interface is opened */
3766 if (priv->bus_type == BUS_TYPE_PCCARD)
3767 atmel_write16(dev, GCR, 0x0060);
3768 atmel_write16(dev, GCR, 0x0040);
3769 rc = 1;
3770 }
3771 }
3772
3773 if (rc) {
3774 if (dev->dev_addr[0] == 0xFF) {
3775 u8 default_mac[] = {0x00, 0x04, 0x25, 0x00, 0x00, 0x00};
3776 printk(KERN_ALERT "%s: *** Invalid MAC address. UPGRADE Firmware ****\n", dev->name);
3777 memcpy(dev->dev_addr, default_mac, 6);
3778 }
3779 }
3780
3781 return rc;
3782 }
3783
3784 /* Move the encyption information on the MIB structure.
3785 This routine is for the pre-WPA firmware: later firmware has
3786 a different format MIB and a different routine. */
3787 static void build_wep_mib(struct atmel_private *priv)
3788 {
3789 struct { /* NB this is matched to the hardware, don't change. */
3790 u8 wep_is_on;
3791 u8 default_key; /* 0..3 */
3792 u8 reserved;
3793 u8 exclude_unencrypted;
3794
3795 u32 WEPICV_error_count;
3796 u32 WEP_excluded_count;
3797
3798 u8 wep_keys[MAX_ENCRYPTION_KEYS][13];
3799 u8 encryption_level; /* 0, 1, 2 */
3800 u8 reserved2[3];
3801 } mib;
3802 int i;
3803
3804 mib.wep_is_on = priv->wep_is_on;
3805 if (priv->wep_is_on) {
3806 if (priv->wep_key_len[priv->default_key] > 5)
3807 mib.encryption_level = 2;
3808 else
3809 mib.encryption_level = 1;
3810 } else {
3811 mib.encryption_level = 0;
3812 }
3813
3814 mib.default_key = priv->default_key;
3815 mib.exclude_unencrypted = priv->exclude_unencrypted;
3816
3817 for (i = 0; i < MAX_ENCRYPTION_KEYS; i++)
3818 memcpy(mib.wep_keys[i], priv->wep_keys[i], 13);
3819
3820 atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
3821 }
3822
3823 static void build_wpa_mib(struct atmel_private *priv)
3824 {
3825 /* This is for the later (WPA enabled) firmware. */
3826
3827 struct { /* NB this is matched to the hardware, don't change. */
3828 u8 cipher_default_key_value[MAX_ENCRYPTION_KEYS][MAX_ENCRYPTION_KEY_SIZE];
3829 u8 receiver_address[6];
3830 u8 wep_is_on;
3831 u8 default_key; /* 0..3 */
3832 u8 group_key;
3833 u8 exclude_unencrypted;
3834 u8 encryption_type;
3835 u8 reserved;
3836
3837 u32 WEPICV_error_count;
3838 u32 WEP_excluded_count;
3839
3840 u8 key_RSC[4][8];
3841 } mib;
3842
3843 int i;
3844
3845 mib.wep_is_on = priv->wep_is_on;
3846 mib.exclude_unencrypted = priv->exclude_unencrypted;
3847 memcpy(mib.receiver_address, priv->CurrentBSSID, 6);
3848
3849 /* zero all the keys before adding in valid ones. */
3850 memset(mib.cipher_default_key_value, 0, sizeof(mib.cipher_default_key_value));
3851
3852 if (priv->wep_is_on) {
3853 /* There's a comment in the Atmel code to the effect that this
3854 is only valid when still using WEP, it may need to be set to
3855 something to use WPA */
3856 memset(mib.key_RSC, 0, sizeof(mib.key_RSC));
3857
3858 mib.default_key = mib.group_key = 255;
3859 for (i = 0; i < MAX_ENCRYPTION_KEYS; i++) {
3860 if (priv->wep_key_len[i] > 0) {
3861 memcpy(mib.cipher_default_key_value[i], priv->wep_keys[i], MAX_ENCRYPTION_KEY_SIZE);
3862 if (i == priv->default_key) {
3863 mib.default_key = i;
3864 mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 7;
3865 mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->pairwise_cipher_suite;
3866 } else {
3867 mib.group_key = i;
3868 priv->group_cipher_suite = priv->pairwise_cipher_suite;
3869 mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-1] = 1;
3870 mib.cipher_default_key_value[i][MAX_ENCRYPTION_KEY_SIZE-2] = priv->group_cipher_suite;
3871 }
3872 }
3873 }
3874 if (mib.default_key == 255)
3875 mib.default_key = mib.group_key != 255 ? mib.group_key : 0;
3876 if (mib.group_key == 255)
3877 mib.group_key = mib.default_key;
3878
3879 }
3880
3881 atmel_set_mib(priv, Mac_Wep_Mib_Type, 0, (u8 *)&mib, sizeof(mib));
3882 }
3883
3884 static int reset_atmel_card(struct net_device *dev)
3885 {
3886 /* do everything necessary to wake up the hardware, including
3887 waiting for the lightning strike and throwing the knife switch....
3888
3889 set all the Mib values which matter in the card to match
3890 their settings in the atmel_private structure. Some of these
3891 can be altered on the fly, but many (WEP, infrastucture or ad-hoc)
3892 can only be changed by tearing down the world and coming back through
3893 here.
3894
3895 This routine is also responsible for initialising some
3896 hardware-specific fields in the atmel_private structure,
3897 including a copy of the firmware's hostinfo stucture
3898 which is the route into the rest of the firmware datastructures. */
3899
3900 struct atmel_private *priv = netdev_priv(dev);
3901 u8 configuration;
3902 int old_state = priv->station_state;
3903 int err = 0;
3904
3905 /* data to add to the firmware names, in priority order
3906 this implemenents firmware versioning */
3907
3908 static char *firmware_modifier[] = {
3909 "-wpa",
3910 "",
3911 NULL
3912 };
3913
3914 /* reset pccard */
3915 if (priv->bus_type == BUS_TYPE_PCCARD)
3916 atmel_write16(priv->dev, GCR, 0x0060);
3917
3918 /* stop card , disable interrupts */
3919 atmel_write16(priv->dev, GCR, 0x0040);
3920
3921 if (priv->card_type == CARD_TYPE_EEPROM) {
3922 /* copy in firmware if needed */
3923 const struct firmware *fw_entry = NULL;
3924 const unsigned char *fw;
3925 int len = priv->firmware_length;
3926 if (!(fw = priv->firmware)) {
3927 if (priv->firmware_type == ATMEL_FW_TYPE_NONE) {
3928 if (strlen(priv->firmware_id) == 0) {
3929 printk(KERN_INFO
3930 "%s: card type is unknown: assuming at76c502 firmware is OK.\n",
3931 dev->name);
3932 printk(KERN_INFO
3933 "%s: if not, use the firmware= module parameter.\n",
3934 dev->name);
3935 strcpy(priv->firmware_id, "atmel_at76c502.bin");
3936 }
3937 err = request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev);
3938 if (err != 0) {
3939 printk(KERN_ALERT
3940 "%s: firmware %s is missing, cannot continue.\n",
3941 dev->name, priv->firmware_id);
3942 return err;
3943 }
3944 } else {
3945 int fw_index = 0;
3946 int success = 0;
3947
3948 /* get firmware filename entry based on firmware type ID */
3949 while (fw_table[fw_index].fw_type != priv->firmware_type
3950 && fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE)
3951 fw_index++;
3952
3953 /* construct the actual firmware file name */
3954 if (fw_table[fw_index].fw_type != ATMEL_FW_TYPE_NONE) {
3955 int i;
3956 for (i = 0; firmware_modifier[i]; i++) {
3957 snprintf(priv->firmware_id, 32, "%s%s.%s", fw_table[fw_index].fw_file,
3958 firmware_modifier[i], fw_table[fw_index].fw_file_ext);
3959 priv->firmware_id[31] = '\0';
3960 if (request_firmware(&fw_entry, priv->firmware_id, priv->sys_dev) == 0) {
3961 success = 1;
3962 break;
3963 }
3964 }
3965 }
3966 if (!success) {
3967 printk(KERN_ALERT
3968 "%s: firmware %s is missing, cannot start.\n",
3969 dev->name, priv->firmware_id);
3970 priv->firmware_id[0] = '\0';
3971 return -ENOENT;
3972 }
3973 }
3974
3975 fw = fw_entry->data;
3976 len = fw_entry->size;
3977 }
3978
3979 if (len <= 0x6000) {
3980 atmel_write16(priv->dev, BSR, BSS_IRAM);
3981 atmel_copy_to_card(priv->dev, 0, fw, len);
3982 atmel_set_gcr(priv->dev, GCR_REMAP);
3983 } else {
3984 /* Remap */
3985 atmel_set_gcr(priv->dev, GCR_REMAP);
3986 atmel_write16(priv->dev, BSR, BSS_IRAM);
3987 atmel_copy_to_card(priv->dev, 0, fw, 0x6000);
3988 atmel_write16(priv->dev, BSR, 0x2ff);
3989 atmel_copy_to_card(priv->dev, 0x8000, &fw[0x6000], len - 0x6000);
3990 }
3991
3992 if (fw_entry)
3993 release_firmware(fw_entry);
3994 }
3995
3996 err = atmel_wakeup_firmware(priv);
3997 if (err != 0)
3998 return err;
3999
4000 /* Check the version and set the correct flag for wpa stuff,
4001 old and new firmware is incompatible.
4002 The pre-wpa 3com firmware reports major version 5,
4003 the wpa 3com firmware is major version 4 and doesn't need
4004 the 3com broken-ness filter. */
4005 priv->use_wpa = (priv->host_info.major_version == 4);
4006 priv->radio_on_broken = (priv->host_info.major_version == 5);
4007
4008 /* unmask all irq sources */
4009 atmel_wmem8(priv, atmel_hi(priv, IFACE_INT_MASK_OFFSET), 0xff);
4010
4011 /* int Tx system and enable Tx */
4012 atmel_wmem8(priv, atmel_tx(priv, TX_DESC_FLAGS_OFFSET, 0), 0);
4013 atmel_wmem32(priv, atmel_tx(priv, TX_DESC_NEXT_OFFSET, 0), 0x80000000L);
4014 atmel_wmem16(priv, atmel_tx(priv, TX_DESC_POS_OFFSET, 0), 0);
4015 atmel_wmem16(priv, atmel_tx(priv, TX_DESC_SIZE_OFFSET, 0), 0);
4016
4017 priv->tx_desc_free = priv->host_info.tx_desc_count;
4018 priv->tx_desc_head = 0;
4019 priv->tx_desc_tail = 0;
4020 priv->tx_desc_previous = 0;
4021 priv->tx_free_mem = priv->host_info.tx_buff_size;
4022 priv->tx_buff_head = 0;
4023 priv->tx_buff_tail = 0;
4024
4025 configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
4026 atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
4027 configuration | FUNC_CTRL_TxENABLE);
4028
4029 /* init Rx system and enable */
4030 priv->rx_desc_head = 0;
4031
4032 configuration = atmel_rmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET));
4033 atmel_wmem8(priv, atmel_hi(priv, IFACE_FUNC_CTRL_OFFSET),
4034 configuration | FUNC_CTRL_RxENABLE);
4035
4036 if (!priv->radio_on_broken) {
4037 if (atmel_send_command_wait(priv, CMD_EnableRadio, NULL, 0) ==
4038 CMD_STATUS_REJECTED_RADIO_OFF) {
4039 printk(KERN_INFO "%s: cannot turn the radio on.\n",
4040 dev->name);
4041 return -EIO;
4042 }
4043 }
4044
4045 /* set up enough MIB values to run. */
4046 atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_AUTO_TX_RATE_POS, priv->auto_tx_rate);
4047 atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_TX_PROMISCUOUS_POS, PROM_MODE_OFF);
4048 atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_RTS_THRESHOLD_POS, priv->rts_threshold);
4049 atmel_set_mib16(priv, Mac_Mib_Type, MAC_MIB_FRAG_THRESHOLD_POS, priv->frag_threshold);
4050 atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_SHORT_RETRY_POS, priv->short_retry);
4051 atmel_set_mib8(priv, Mac_Mib_Type, MAC_MIB_LONG_RETRY_POS, priv->long_retry);
4052 atmel_set_mib8(priv, Local_Mib_Type, LOCAL_MIB_PREAMBLE_TYPE, priv->preamble);
4053 atmel_set_mib(priv, Mac_Address_Mib_Type, MAC_ADDR_MIB_MAC_ADDR_POS,
4054 priv->dev->dev_addr, 6);
4055 atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_PS_MODE_POS, ACTIVE_MODE);
4056 atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_LISTEN_INTERVAL_POS, 1);
4057 atmel_set_mib16(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_BEACON_PER_POS, priv->default_beacon_period);
4058 atmel_set_mib(priv, Phy_Mib_Type, PHY_MIB_RATE_SET_POS, atmel_basic_rates, 4);
4059 atmel_set_mib8(priv, Mac_Mgmt_Mib_Type, MAC_MGMT_MIB_CUR_PRIVACY_POS, priv->wep_is_on);
4060 if (priv->use_wpa)
4061 build_wpa_mib(priv);
4062 else
4063 build_wep_mib(priv);
4064
4065 if (old_state == STATION_STATE_READY) {
4066 union iwreq_data wrqu;
4067
4068 wrqu.data.length = 0;
4069 wrqu.data.flags = 0;
4070 wrqu.ap_addr.sa_family = ARPHRD_ETHER;
4071 memset(wrqu.ap_addr.sa_data, 0, ETH_ALEN);
4072 wireless_send_event(priv->dev, SIOCGIWAP, &wrqu, NULL);
4073 }
4074
4075 return 0;
4076 }
4077
4078 static void atmel_send_command(struct atmel_private *priv, int command,
4079 void *cmd, int cmd_size)
4080 {
4081 if (cmd)
4082 atmel_copy_to_card(priv->dev, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET),
4083 cmd, cmd_size);
4084
4085 atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_COMMAND_OFFSET), command);
4086 atmel_wmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET), 0);
4087 }
4088
4089 static int atmel_send_command_wait(struct atmel_private *priv, int command,
4090 void *cmd, int cmd_size)
4091 {
4092 int i, status;
4093
4094 atmel_send_command(priv, command, cmd, cmd_size);
4095
4096 for (i = 5000; i; i--) {
4097 status = atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_STATUS_OFFSET));
4098 if (status != CMD_STATUS_IDLE &&
4099 status != CMD_STATUS_IN_PROGRESS)
4100 break;
4101 udelay(20);
4102 }
4103
4104 if (i == 0) {
4105 printk(KERN_ALERT "%s: failed to contact MAC.\n", priv->dev->name);
4106 status = CMD_STATUS_HOST_ERROR;
4107 } else {
4108 if (command != CMD_EnableRadio)
4109 status = CMD_STATUS_COMPLETE;
4110 }
4111
4112 return status;
4113 }
4114
4115 static u8 atmel_get_mib8(struct atmel_private *priv, u8 type, u8 index)
4116 {
4117 struct get_set_mib m;
4118 m.type = type;
4119 m.size = 1;
4120 m.index = index;
4121
4122 atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
4123 return atmel_rmem8(priv, atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE));
4124 }
4125
4126 static void atmel_set_mib8(struct atmel_private *priv, u8 type, u8 index, u8 data)
4127 {
4128 struct get_set_mib m;
4129 m.type = type;
4130 m.size = 1;
4131 m.index = index;
4132 m.data[0] = data;
4133
4134 atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 1);
4135 }
4136
4137 static void atmel_set_mib16(struct atmel_private *priv, u8 type, u8 index,
4138 u16 data)
4139 {
4140 struct get_set_mib m;
4141 m.type = type;
4142 m.size = 2;
4143 m.index = index;
4144 m.data[0] = data;
4145 m.data[1] = data >> 8;
4146
4147 atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + 2);
4148 }
4149
4150 static void atmel_set_mib(struct atmel_private *priv, u8 type, u8 index,
4151 u8 *data, int data_len)
4152 {
4153 struct get_set_mib m;
4154 m.type = type;
4155 m.size = data_len;
4156 m.index = index;
4157
4158 if (data_len > MIB_MAX_DATA_BYTES)
4159 printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);
4160
4161 memcpy(m.data, data, data_len);
4162 atmel_send_command_wait(priv, CMD_Set_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
4163 }
4164
4165 static void atmel_get_mib(struct atmel_private *priv, u8 type, u8 index,
4166 u8 *data, int data_len)
4167 {
4168 struct get_set_mib m;
4169 m.type = type;
4170 m.size = data_len;
4171 m.index = index;
4172
4173 if (data_len > MIB_MAX_DATA_BYTES)
4174 printk(KERN_ALERT "%s: MIB buffer too small.\n", priv->dev->name);
4175
4176 atmel_send_command_wait(priv, CMD_Get_MIB_Vars, &m, MIB_HEADER_SIZE + data_len);
4177 atmel_copy_to_host(priv->dev, data,
4178 atmel_co(priv, CMD_BLOCK_PARAMETERS_OFFSET + MIB_HEADER_SIZE), data_len);
4179 }
4180
4181 static void atmel_writeAR(struct net_device *dev, u16 data)
4182 {
4183 int i;
4184 outw(data, dev->base_addr + AR);
4185 /* Address register appears to need some convincing..... */
4186 for (i = 0; data != inw(dev->base_addr + AR) && i < 10; i++)
4187 outw(data, dev->base_addr + AR);
4188 }
4189
4190 static void atmel_copy_to_card(struct net_device *dev, u16 dest,
4191 const unsigned char *src, u16 len)
4192 {
4193 int i;
4194 atmel_writeAR(dev, dest);
4195 if (dest % 2) {
4196 atmel_write8(dev, DR, *src);
4197 src++; len--;
4198 }
4199 for (i = len; i > 1 ; i -= 2) {
4200 u8 lb = *src++;
4201 u8 hb = *src++;
4202 atmel_write16(dev, DR, lb | (hb << 8));
4203 }
4204 if (i)
4205 atmel_write8(dev, DR, *src);
4206 }
4207
4208 static void atmel_copy_to_host(struct net_device *dev, unsigned char *dest,
4209 u16 src, u16 len)
4210 {
4211 int i;
4212 atmel_writeAR(dev, src);
4213 if (src % 2) {
4214 *dest = atmel_read8(dev, DR);
4215 dest++; len--;
4216 }
4217 for (i = len; i > 1 ; i -= 2) {
4218 u16 hw = atmel_read16(dev, DR);
4219 *dest++ = hw;
4220 *dest++ = hw >> 8;
4221 }
4222 if (i)
4223 *dest = atmel_read8(dev, DR);
4224 }
4225
4226 static void atmel_set_gcr(struct net_device *dev, u16 mask)
4227 {
4228 outw(inw(dev->base_addr + GCR) | mask, dev->base_addr + GCR);
4229 }
4230
4231 static void atmel_clear_gcr(struct net_device *dev, u16 mask)
4232 {
4233 outw(inw(dev->base_addr + GCR) & ~mask, dev->base_addr + GCR);
4234 }
4235
4236 static int atmel_lock_mac(struct atmel_private *priv)
4237 {
4238 int i, j = 20;
4239 retry:
4240 for (i = 5000; i; i--) {
4241 if (!atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET)))
4242 break;
4243 udelay(20);
4244 }
4245
4246 if (!i)
4247 return 0; /* timed out */
4248
4249 atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 1);
4250 if (atmel_rmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_HOST_OFFSET))) {
4251 atmel_wmem8(priv, atmel_hi(priv, IFACE_LOCKOUT_MAC_OFFSET), 0);
4252 if (!j--)
4253 return 0; /* timed out */
4254 goto retry;
4255 }
4256
4257 return 1;
4258 }
4259
4260 static void atmel_wmem32(struct atmel_private *priv, u16 pos, u32 data)
4261 {
4262 atmel_writeAR(priv->dev, pos);
4263 atmel_write16(priv->dev, DR, data); /* card is little-endian */
4264 atmel_write16(priv->dev, DR, data >> 16);
4265 }
4266
4267 /***************************************************************************/
4268 /* There follows the source form of the MAC address reading firmware */
4269 /***************************************************************************/
4270 #if 0
4271
4272 /* Copyright 2003 Matthew T. Russotto */
4273 /* But derived from the Atmel 76C502 firmware written by Atmel and */
4274 /* included in "atmel wireless lan drivers" package */
4275 /**
4276 This file is part of net.russotto.AtmelMACFW, hereto referred to
4277 as AtmelMACFW
4278
4279 AtmelMACFW is free software; you can redistribute it and/or modify
4280 it under the terms of the GNU General Public License version 2
4281 as published by the Free Software Foundation.
4282
4283 AtmelMACFW is distributed in the hope that it will be useful,
4284 but WITHOUT ANY WARRANTY; without even the implied warranty of
4285 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
4286 GNU General Public License for more details.
4287
4288 You should have received a copy of the GNU General Public License
4289 along with AtmelMACFW; if not, write to the Free Software
4290 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
4291
4292 ****************************************************************************/
4293 /* This firmware should work on the 76C502 RFMD, RFMD_D, and RFMD_E */
4294 /* It will probably work on the 76C504 and 76C502 RFMD_3COM */
4295 /* It only works on SPI EEPROM versions of the card. */
4296
4297 /* This firmware initializes the SPI controller and clock, reads the MAC */
4298 /* address from the EEPROM into SRAM, and puts the SRAM offset of the MAC */
4299 /* address in MR2, and sets MR3 to 0x10 to indicate it is done */
4300 /* It also puts a complete copy of the EEPROM in SRAM with the offset in */
4301 /* MR4, for investigational purposes (maybe we can determine chip type */
4302 /* from that?) */
4303
4304 .org 0
4305 .set MRBASE, 0x8000000
4306 .set CPSR_INITIAL, 0xD3 /* IRQ/FIQ disabled, ARM mode, Supervisor state */
4307 .set CPSR_USER, 0xD1 /* IRQ/FIQ disabled, ARM mode, USER state */
4308 .set SRAM_BASE, 0x02000000
4309 .set SP_BASE, 0x0F300000
4310 .set UNK_BASE, 0x0F000000 /* Some internal device, but which one? */
4311 .set SPI_CGEN_BASE, 0x0E000000 /* Some internal device, but which one? */
4312 .set UNK3_BASE, 0x02014000 /* Some internal device, but which one? */
4313 .set STACK_BASE, 0x5600
4314 .set SP_SR, 0x10
4315 .set SP_TDRE, 2 /* status register bit -- TDR empty */
4316 .set SP_RDRF, 1 /* status register bit -- RDR full */
4317 .set SP_SWRST, 0x80
4318 .set SP_SPIEN, 0x1
4319 .set SP_CR, 0 /* control register */
4320 .set SP_MR, 4 /* mode register */
4321 .set SP_RDR, 0x08 /* Read Data Register */
4322 .set SP_TDR, 0x0C /* Transmit Data Register */
4323 .set SP_CSR0, 0x30 /* chip select registers */
4324 .set SP_CSR1, 0x34
4325 .set SP_CSR2, 0x38
4326 .set SP_CSR3, 0x3C
4327 .set NVRAM_CMD_RDSR, 5 /* read status register */
4328 .set NVRAM_CMD_READ, 3 /* read data */
4329 .set NVRAM_SR_RDY, 1 /* RDY bit. This bit is inverted */
4330 .set SPI_8CLOCKS, 0xFF /* Writing this to the TDR doesn't do anything to the
4331 serial output, since SO is normally high. But it
4332 does cause 8 clock cycles and thus 8 bits to be
4333 clocked in to the chip. See Atmel's SPI
4334 controller (e.g. AT91M55800) timing and 4K
4335 SPI EEPROM manuals */
4336
4337 .set NVRAM_SCRATCH, 0x02000100 /* arbitrary area for scratchpad memory */
4338 .set NVRAM_IMAGE, 0x02000200
4339 .set NVRAM_LENGTH, 0x0200
4340 .set MAC_ADDRESS_MIB, SRAM_BASE
4341 .set MAC_ADDRESS_LENGTH, 6
4342 .set MAC_BOOT_FLAG, 0x10
4343 .set MR1, 0
4344 .set MR2, 4
4345 .set MR3, 8
4346 .set MR4, 0xC
4347 RESET_VECTOR:
4348 b RESET_HANDLER
4349 UNDEF_VECTOR:
4350 b HALT1
4351 SWI_VECTOR:
4352 b HALT1
4353 IABORT_VECTOR:
4354 b HALT1
4355 DABORT_VECTOR:
4356 RESERVED_VECTOR:
4357 b HALT1
4358 IRQ_VECTOR:
4359 b HALT1
4360 FIQ_VECTOR:
4361 b HALT1
4362 HALT1: b HALT1
4363 RESET_HANDLER:
4364 mov r0, #CPSR_INITIAL
4365 msr CPSR_c, r0 /* This is probably unnecessary */
4366
4367 /* I'm guessing this is initializing clock generator electronics for SPI */
4368 ldr r0, =SPI_CGEN_BASE
4369 mov r1, #0
4370 mov r1, r1, lsl #3
4371 orr r1, r1, #0
4372 str r1, [r0]
4373 ldr r1, [r0, #28]
4374 bic r1, r1, #16
4375 str r1, [r0, #28]
4376 mov r1, #1
4377 str r1, [r0, #8]
4378
4379 ldr r0, =MRBASE
4380 mov r1, #0
4381 strh r1, [r0, #MR1]
4382 strh r1, [r0, #MR2]
4383 strh r1, [r0, #MR3]
4384 strh r1, [r0, #MR4]
4385
4386 mov sp, #STACK_BASE
4387 bl SP_INIT
4388 mov r0, #10
4389 bl DELAY9
4390 bl GET_MAC_ADDR
4391 bl GET_WHOLE_NVRAM
4392 ldr r0, =MRBASE
4393 ldr r1, =MAC_ADDRESS_MIB
4394 strh r1, [r0, #MR2]
4395 ldr r1, =NVRAM_IMAGE
4396 strh r1, [r0, #MR4]
4397 mov r1, #MAC_BOOT_FLAG
4398 strh r1, [r0, #MR3]
4399 HALT2: b HALT2
4400 .func Get_Whole_NVRAM, GET_WHOLE_NVRAM
4401 GET_WHOLE_NVRAM:
4402 stmdb sp!, {lr}
4403 mov r2, #0 /* 0th bytes of NVRAM */
4404 mov r3, #NVRAM_LENGTH
4405 mov r1, #0 /* not used in routine */
4406 ldr r0, =NVRAM_IMAGE
4407 bl NVRAM_XFER
4408 ldmia sp!, {lr}
4409 bx lr
4410 .endfunc
4411
4412 .func Get_MAC_Addr, GET_MAC_ADDR
4413 GET_MAC_ADDR:
4414 stmdb sp!, {lr}
4415 mov r2, #0x120 /* address of MAC Address within NVRAM */
4416 mov r3, #MAC_ADDRESS_LENGTH
4417 mov r1, #0 /* not used in routine */
4418 ldr r0, =MAC_ADDRESS_MIB
4419 bl NVRAM_XFER
4420 ldmia sp!, {lr}
4421 bx lr
4422 .endfunc
4423 .ltorg
4424 .func Delay9, DELAY9
4425 DELAY9:
4426 adds r0, r0, r0, LSL #3 /* r0 = r0 * 9 */
4427 DELAYLOOP:
4428 beq DELAY9_done
4429 subs r0, r0, #1
4430 b DELAYLOOP
4431 DELAY9_done:
4432 bx lr
4433 .endfunc
4434
4435 .func SP_Init, SP_INIT
4436 SP_INIT:
4437 mov r1, #SP_SWRST
4438 ldr r0, =SP_BASE
4439 str r1, [r0, #SP_CR] /* reset the SPI */
4440 mov r1, #0
4441 str r1, [r0, #SP_CR] /* release SPI from reset state */
4442 mov r1, #SP_SPIEN
4443 str r1, [r0, #SP_MR] /* set the SPI to MASTER mode*/
4444 str r1, [r0, #SP_CR] /* enable the SPI */
4445
4446 /* My guess would be this turns on the SPI clock */
4447 ldr r3, =SPI_CGEN_BASE
4448 ldr r1, [r3, #28]
4449 orr r1, r1, #0x2000
4450 str r1, [r3, #28]
4451
4452 ldr r1, =0x2000c01
4453 str r1, [r0, #SP_CSR0]
4454 ldr r1, =0x2000201
4455 str r1, [r0, #SP_CSR1]
4456 str r1, [r0, #SP_CSR2]
4457 str r1, [r0, #SP_CSR3]
4458 ldr r1, [r0, #SP_SR]
4459 ldr r0, [r0, #SP_RDR]
4460 bx lr
4461 .endfunc
4462 .func NVRAM_Init, NVRAM_INIT
4463 NVRAM_INIT:
4464 ldr r1, =SP_BASE
4465 ldr r0, [r1, #SP_RDR]
4466 mov r0, #NVRAM_CMD_RDSR
4467 str r0, [r1, #SP_TDR]
4468 SP_loop1:
4469 ldr r0, [r1, #SP_SR]
4470 tst r0, #SP_TDRE
4471 beq SP_loop1
4472
4473 mov r0, #SPI_8CLOCKS
4474 str r0, [r1, #SP_TDR]
4475 SP_loop2:
4476 ldr r0, [r1, #SP_SR]
4477 tst r0, #SP_TDRE
4478 beq SP_loop2
4479
4480 ldr r0, [r1, #SP_RDR]
4481 SP_loop3:
4482 ldr r0, [r1, #SP_SR]
4483 tst r0, #SP_RDRF
4484 beq SP_loop3
4485
4486 ldr r0, [r1, #SP_RDR]
4487 and r0, r0, #255
4488 bx lr
4489 .endfunc
4490
4491 .func NVRAM_Xfer, NVRAM_XFER
4492 /* r0 = dest address */
4493 /* r1 = not used */
4494 /* r2 = src address within NVRAM */
4495 /* r3 = length */
4496 NVRAM_XFER:
4497 stmdb sp!, {r4, r5, lr}
4498 mov r5, r0 /* save r0 (dest address) */
4499 mov r4, r3 /* save r3 (length) */
4500 mov r0, r2, LSR #5 /* SPI memories put A8 in the command field */
4501 and r0, r0, #8
4502 add r0, r0, #NVRAM_CMD_READ
4503 ldr r1, =NVRAM_SCRATCH
4504 strb r0, [r1, #0] /* save command in NVRAM_SCRATCH[0] */
4505 strb r2, [r1, #1] /* save low byte of source address in NVRAM_SCRATCH[1] */
4506 _local1:
4507 bl NVRAM_INIT
4508 tst r0, #NVRAM_SR_RDY
4509 bne _local1
4510 mov r0, #20
4511 bl DELAY9
4512 mov r2, r4 /* length */
4513 mov r1, r5 /* dest address */
4514 mov r0, #2 /* bytes to transfer in command */
4515 bl NVRAM_XFER2
4516 ldmia sp!, {r4, r5, lr}
4517 bx lr
4518 .endfunc
4519
4520 .func NVRAM_Xfer2, NVRAM_XFER2
4521 NVRAM_XFER2:
4522 stmdb sp!, {r4, r5, r6, lr}
4523 ldr r4, =SP_BASE
4524 mov r3, #0
4525 cmp r0, #0
4526 bls _local2
4527 ldr r5, =NVRAM_SCRATCH
4528 _local4:
4529 ldrb r6, [r5, r3]
4530 str r6, [r4, #SP_TDR]
4531 _local3:
4532 ldr r6, [r4, #SP_SR]
4533 tst r6, #SP_TDRE
4534 beq _local3
4535 add r3, r3, #1
4536 cmp r3, r0 /* r0 is # of bytes to send out (command+addr) */
4537 blo _local4
4538 _local2:
4539 mov r3, #SPI_8CLOCKS
4540 str r3, [r4, #SP_TDR]
4541 ldr r0, [r4, #SP_RDR]
4542 _local5:
4543 ldr r0, [r4, #SP_SR]
4544 tst r0, #SP_RDRF
4545 beq _local5
4546 ldr r0, [r4, #SP_RDR] /* what's this byte? It's the byte read while writing the TDR -- nonsense, because the NVRAM doesn't read and write at the same time */
4547 mov r0, #0
4548 cmp r2, #0 /* r2 is # of bytes to copy in */
4549 bls _local6
4550 _local7:
4551 ldr r5, [r4, #SP_SR]
4552 tst r5, #SP_TDRE
4553 beq _local7
4554 str r3, [r4, #SP_TDR] /* r3 has SPI_8CLOCKS */
4555 _local8:
4556 ldr r5, [r4, #SP_SR]
4557 tst r5, #SP_RDRF
4558 beq _local8
4559 ldr r5, [r4, #SP_RDR] /* but didn't we read this byte above? */
4560 strb r5, [r1], #1 /* postindexed */
4561 add r0, r0, #1
4562 cmp r0, r2
4563 blo _local7 /* since we don't send another address, the NVRAM must be capable of sequential reads */
4564 _local6:
4565 mov r0, #200
4566 bl DELAY9
4567 ldmia sp!, {r4, r5, r6, lr}
4568 bx lr
4569 #endif
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