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