summaryrefslogtreecommitdiffstats
path: root/drivers/net/wireless/hermes.h
blob: 7644f72a9f4efd3269c40cd46b09cefbda196e85 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
/* hermes.h
 *
 * Driver core for the "Hermes" wireless MAC controller, as used in
 * the Lucent Orinoco and Cabletron RoamAbout cards. It should also
 * work on the hfa3841 and hfa3842 MAC controller chips used in the
 * Prism I & II chipsets.
 *
 * This is not a complete driver, just low-level access routines for
 * the MAC controller itself.
 *
 * Based on the prism2 driver from Absolute Value Systems' linux-wlan
 * project, the Linux wvlan_cs driver, Lucent's HCF-Light
 * (wvlan_hcf.c) library, and the NetBSD wireless driver.
 *
 * Copyright (C) 2000, David Gibson, Linuxcare Australia.
 * (C) Copyright David Gibson, IBM Corp. 2001-2003.
 *
 * Portions taken from hfa384x.h, Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
 *
 * This file distributed under the GPL, version 2.
 */

#ifndef _HERMES_H
#define _HERMES_H

/* Notes on locking:
 *
 * As a module of low level hardware access routines, there is no
 * locking. Users of this module should ensure that they serialize
 * access to the hermes_t structure, and to the hardware
*/

#include <linux/if_ether.h>
#include <asm/io.h>

/*
 * Limits and constants
 */
#define		HERMES_ALLOC_LEN_MIN		(4)
#define		HERMES_ALLOC_LEN_MAX		(2400)
#define		HERMES_LTV_LEN_MAX		(34)
#define		HERMES_BAP_DATALEN_MAX		(4096)
#define		HERMES_BAP_OFFSET_MAX		(4096)
#define		HERMES_PORTID_MAX		(7)
#define		HERMES_NUMPORTS_MAX		(HERMES_PORTID_MAX+1)
#define		HERMES_PDR_LEN_MAX		(260)	/* in bytes, from EK */
#define		HERMES_PDA_RECS_MAX		(200)	/* a guess */
#define		HERMES_PDA_LEN_MAX		(1024)	/* in bytes, from EK */
#define		HERMES_SCANRESULT_MAX		(35)
#define		HERMES_CHINFORESULT_MAX		(8)
#define		HERMES_MAX_MULTICAST		(16)
#define		HERMES_MAGIC			(0x7d1f)

/*
 * Hermes register offsets
 */
#define		HERMES_CMD			(0x00)
#define		HERMES_PARAM0			(0x02)
#define		HERMES_PARAM1			(0x04)
#define		HERMES_PARAM2			(0x06)
#define		HERMES_STATUS			(0x08)
#define		HERMES_RESP0			(0x0A)
#define		HERMES_RESP1			(0x0C)
#define		HERMES_RESP2			(0x0E)
#define		HERMES_INFOFID			(0x10)
#define		HERMES_RXFID			(0x20)
#define		HERMES_ALLOCFID			(0x22)
#define		HERMES_TXCOMPLFID		(0x24)
#define		HERMES_SELECT0			(0x18)
#define		HERMES_OFFSET0			(0x1C)
#define		HERMES_DATA0			(0x36)
#define		HERMES_SELECT1			(0x1A)
#define		HERMES_OFFSET1			(0x1E)
#define		HERMES_DATA1			(0x38)
#define		HERMES_EVSTAT			(0x30)
#define		HERMES_INTEN			(0x32)
#define		HERMES_EVACK			(0x34)
#define		HERMES_CONTROL			(0x14)
#define		HERMES_SWSUPPORT0		(0x28)
#define		HERMES_SWSUPPORT1		(0x2A)
#define		HERMES_SWSUPPORT2		(0x2C)
#define		HERMES_AUXPAGE			(0x3A)
#define		HERMES_AUXOFFSET		(0x3C)
#define		HERMES_AUXDATA			(0x3E)

/*
 * CMD register bitmasks
 */
#define		HERMES_CMD_BUSY			(0x8000)
#define		HERMES_CMD_AINFO		(0x7f00)
#define		HERMES_CMD_MACPORT		(0x0700)
#define		HERMES_CMD_RECL			(0x0100)
#define		HERMES_CMD_WRITE		(0x0100)
#define		HERMES_CMD_PROGMODE		(0x0300)
#define		HERMES_CMD_CMDCODE		(0x003f)

/*
 * STATUS register bitmasks
 */
#define		HERMES_STATUS_RESULT		(0x7f00)
#define		HERMES_STATUS_CMDCODE		(0x003f)

/*
 * OFFSET register bitmasks
 */
#define		HERMES_OFFSET_BUSY		(0x8000)
#define		HERMES_OFFSET_ERR		(0x4000)
#define		HERMES_OFFSET_DATAOFF		(0x0ffe)

/*
 * Event register bitmasks (INTEN, EVSTAT, EVACK)
 */
#define		HERMES_EV_TICK			(0x8000)
#define		HERMES_EV_WTERR			(0x4000)
#define		HERMES_EV_INFDROP		(0x2000)
#define		HERMES_EV_INFO			(0x0080)
#define		HERMES_EV_DTIM			(0x0020)
#define		HERMES_EV_CMD			(0x0010)
#define		HERMES_EV_ALLOC			(0x0008)
#define		HERMES_EV_TXEXC			(0x0004)
#define		HERMES_EV_TX			(0x0002)
#define		HERMES_EV_RX			(0x0001)

/*
 * Command codes
 */
/*--- Controller Commands ----------------------------*/
#define		HERMES_CMD_INIT			(0x0000)
#define		HERMES_CMD_ENABLE		(0x0001)
#define		HERMES_CMD_DISABLE		(0x0002)
#define		HERMES_CMD_DIAG			(0x0003)

/*--- Buffer Mgmt Commands ---------------------------*/
#define		HERMES_CMD_ALLOC		(0x000A)
#define		HERMES_CMD_TX			(0x000B)

/*--- Regulate Commands ------------------------------*/
#define		HERMES_CMD_NOTIFY		(0x0010)
#define		HERMES_CMD_INQUIRE		(0x0011)

/*--- Configure Commands -----------------------------*/
#define		HERMES_CMD_ACCESS		(0x0021)
#define		HERMES_CMD_DOWNLD		(0x0022)

/*--- Serial I/O Commands ----------------------------*/
#define		HERMES_CMD_READMIF		(0x0030)
#define		HERMES_CMD_WRITEMIF		(0x0031)

/*--- Debugging Commands -----------------------------*/
#define 	HERMES_CMD_TEST			(0x0038)


/* Test command arguments */
#define		HERMES_TEST_SET_CHANNEL		0x0800
#define		HERMES_TEST_MONITOR		0x0b00
#define		HERMES_TEST_STOP		0x0f00

/* Authentication algorithms */
#define		HERMES_AUTH_OPEN		1
#define		HERMES_AUTH_SHARED_KEY		2

/* WEP settings */
#define		HERMES_WEP_PRIVACY_INVOKED	0x0001
#define		HERMES_WEP_EXCL_UNENCRYPTED	0x0002
#define		HERMES_WEP_HOST_ENCRYPT		0x0010
#define		HERMES_WEP_HOST_DECRYPT		0x0080

/* Symbol hostscan options */
#define		HERMES_HOSTSCAN_SYMBOL_5SEC	0x0001
#define		HERMES_HOSTSCAN_SYMBOL_ONCE	0x0002
#define		HERMES_HOSTSCAN_SYMBOL_PASSIVE	0x0040
#define		HERMES_HOSTSCAN_SYMBOL_BCAST	0x0080

/*
 * Frame structures and constants
 */

#define HERMES_DESCRIPTOR_OFFSET	0
#define HERMES_802_11_OFFSET		(14)
#define HERMES_802_3_OFFSET		(14+32)
#define HERMES_802_2_OFFSET		(14+32+14)

#define HERMES_RXSTAT_ERR		(0x0003)
#define	HERMES_RXSTAT_BADCRC		(0x0001)
#define	HERMES_RXSTAT_UNDECRYPTABLE	(0x0002)
#define	HERMES_RXSTAT_MACPORT		(0x0700)
#define HERMES_RXSTAT_PCF		(0x1000)	/* Frame was received in CF period */
#define	HERMES_RXSTAT_MSGTYPE		(0xE000)
#define	HERMES_RXSTAT_1042		(0x2000)	/* RFC-1042 frame */
#define	HERMES_RXSTAT_TUNNEL		(0x4000)	/* bridge-tunnel encoded frame */
#define	HERMES_RXSTAT_WMP		(0x6000)	/* Wavelan-II Management Protocol frame */

struct hermes_tx_descriptor {
	__le16 status;
	__le16 reserved1;
	__le16 reserved2;
	__le32 sw_support;
	u8 retry_count;
	u8 tx_rate;
	__le16 tx_control;	
} __attribute__ ((packed));

#define HERMES_TXSTAT_RETRYERR		(0x0001)
#define HERMES_TXSTAT_AGEDERR		(0x0002)
#define HERMES_TXSTAT_DISCON		(0x0004)
#define HERMES_TXSTAT_FORMERR		(0x0008)

#define HERMES_TXCTRL_TX_OK		(0x0002)	/* ?? interrupt on Tx complete */
#define HERMES_TXCTRL_TX_EX		(0x0004)	/* ?? interrupt on Tx exception */
#define HERMES_TXCTRL_802_11		(0x0008)	/* We supply 802.11 header */
#define HERMES_TXCTRL_ALT_RTRY		(0x0020)

/* Inquiry constants and data types */

#define HERMES_INQ_TALLIES		(0xF100)
#define HERMES_INQ_SCAN			(0xF101)
#define HERMES_INQ_CHANNELINFO		(0xF102)
#define HERMES_INQ_HOSTSCAN		(0xF103)
#define HERMES_INQ_HOSTSCAN_SYMBOL	(0xF104)
#define HERMES_INQ_LINKSTATUS		(0xF200)
#define HERMES_INQ_SEC_STAT_AGERE	(0xF202)

struct hermes_tallies_frame {
	__le16 TxUnicastFrames;
	__le16 TxMulticastFrames;
	__le16 TxFragments;
	__le16 TxUnicastOctets;
	__le16 TxMulticastOctets;
	__le16 TxDeferredTransmissions;
	__le16 TxSingleRetryFrames;
	__le16 TxMultipleRetryFrames;
	__le16 TxRetryLimitExceeded;
	__le16 TxDiscards;
	__le16 RxUnicastFrames;
	__le16 RxMulticastFrames;
	__le16 RxFragments;
	__le16 RxUnicastOctets;
	__le16 RxMulticastOctets;
	__le16 RxFCSErrors;
	__le16 RxDiscards_NoBuffer;
	__le16 TxDiscardsWrongSA;
	__le16 RxWEPUndecryptable;
	__le16 RxMsgInMsgFragments;
	__le16 RxMsgInBadMsgFragments;
	/* Those last are probably not available in very old firmwares */
	__le16 RxDiscards_WEPICVError;
	__le16 RxDiscards_WEPExcluded;
} __attribute__ ((packed));

/* Grabbed from wlan-ng - Thanks Mark... - Jean II
 * This is the result of a scan inquiry command */
/* Structure describing info about an Access Point */
struct prism2_scan_apinfo {
	__le16 channel;		/* Channel where the AP sits */
	__le16 noise;		/* Noise level */
	__le16 level;		/* Signal level */
	u8 bssid[ETH_ALEN];	/* MAC address of the Access Point */
	__le16 beacon_interv;	/* Beacon interval */
	__le16 capabilities;	/* Capabilities */
	__le16 essid_len;	/* ESSID length */
	u8 essid[32];		/* ESSID of the network */
	u8 rates[10];		/* Bit rate supported */
	__le16 proberesp_rate;	/* Data rate of the response frame */
	__le16 atim;		/* ATIM window time, Kus (hostscan only) */
} __attribute__ ((packed));

/* Same stuff for the Lucent/Agere card.
 * Thanks to h1kari <h1kari AT dachb0den.com> - Jean II */
struct agere_scan_apinfo {
	__le16 channel;		/* Channel where the AP sits */
	__le16 noise;		/* Noise level */
	__le16 level;		/* Signal level */
	u8 bssid[ETH_ALEN];	/* MAC address of the Access Point */
	__le16 beacon_interv;	/* Beacon interval */
	__le16 capabilities;	/* Capabilities */
	/* bits: 0-ess, 1-ibss, 4-privacy [wep] */
	__le16 essid_len;	/* ESSID length */
	u8 essid[32];		/* ESSID of the network */
} __attribute__ ((packed));

/* Moustafa: Scan structure for Symbol cards */
struct symbol_scan_apinfo {
	u8 channel;		/* Channel where the AP sits */
	u8 unknown1;		/* 8 in 2.9x and 3.9x f/w, 0 otherwise */
	__le16 noise;		/* Noise level */
	__le16 level;		/* Signal level */
	u8 bssid[ETH_ALEN];	/* MAC address of the Access Point */
	__le16 beacon_interv;	/* Beacon interval */
	__le16 capabilities;	/* Capabilities */
	/* bits: 0-ess, 1-ibss, 4-privacy [wep] */
	__le16 essid_len;	/* ESSID length */
	u8 essid[32];		/* ESSID of the network */
    	__le16 rates[5];	/* Bit rate supported */
	__le16 basic_rates;	/* Basic rates bitmask */
	u8 unknown2[6];		/* Always FF:FF:FF:FF:00:00 */
	u8 unknown3[8];		/* Always 0, appeared in f/w 3.91-68 */
} __attribute__ ((packed));

union hermes_scan_info {
	struct agere_scan_apinfo	a;
	struct prism2_scan_apinfo	p;
	struct symbol_scan_apinfo	s;
};

#define HERMES_LINKSTATUS_NOT_CONNECTED   (0x0000)  
#define HERMES_LINKSTATUS_CONNECTED       (0x0001)
#define HERMES_LINKSTATUS_DISCONNECTED    (0x0002)
#define HERMES_LINKSTATUS_AP_CHANGE       (0x0003)
#define HERMES_LINKSTATUS_AP_OUT_OF_RANGE (0x0004)
#define HERMES_LINKSTATUS_AP_IN_RANGE     (0x0005)
#define HERMES_LINKSTATUS_ASSOC_FAILED    (0x0006)
  
struct hermes_linkstatus {
	__le16 linkstatus;         /* Link status */
} __attribute__ ((packed));

struct hermes_response {
	u16 status, resp0, resp1, resp2;
};

/* "ID" structure - used for ESSID and station nickname */
struct hermes_idstring {
	__le16 len;
	__le16 val[16];
} __attribute__ ((packed));

struct hermes_multicast {
	u8 addr[HERMES_MAX_MULTICAST][ETH_ALEN];
} __attribute__ ((packed));

// #define HERMES_DEBUG_BUFFER 1
#define HERMES_DEBUG_BUFSIZE 4096
struct hermes_debug_entry {
	int bap;
	u16 id, offset;
	int cycles;
};

#ifdef __KERNEL__

/* Timeouts */
#define HERMES_BAP_BUSY_TIMEOUT (10000) /* In iterations of ~1us */

/* Basic control structure */
typedef struct hermes {
	void __iomem *iobase;
	int reg_spacing;
#define HERMES_16BIT_REGSPACING	0
#define HERMES_32BIT_REGSPACING	1

	u16 inten; /* Which interrupts should be enabled? */

#ifdef HERMES_DEBUG_BUFFER
	struct hermes_debug_entry dbuf[HERMES_DEBUG_BUFSIZE];
	unsigned long dbufp;
	unsigned long profile[HERMES_BAP_BUSY_TIMEOUT+1];
#endif
} hermes_t;

/* Register access convenience macros */
#define hermes_read_reg(hw, off) \
	(ioread16((hw)->iobase + ( (off) << (hw)->reg_spacing )))
#define hermes_write_reg(hw, off, val) \
	(iowrite16((val), (hw)->iobase + ((off) << (hw)->reg_spacing)))
#define hermes_read_regn(hw, name) hermes_read_reg((hw), HERMES_##name)
#define hermes_write_regn(hw, name, val) hermes_write_reg((hw), HERMES_##name, (val))

/* Function prototypes */
void hermes_struct_init(hermes_t *hw, void __iomem *address, int reg_spacing);
int hermes_init(hermes_t *hw);
int hermes_docmd_wait(hermes_t *hw, u16 cmd, u16 parm0,
		      struct hermes_response *resp);
int hermes_allocate(hermes_t *hw, u16 size, u16 *fid);

int hermes_bap_pread(hermes_t *hw, int bap, void *buf, int len,
		       u16 id, u16 offset);
int hermes_bap_pwrite(hermes_t *hw, int bap, const void *buf, int len,
			u16 id, u16 offset);
int hermes_bap_pwrite_pad(hermes_t *hw, int bap, const void *buf,
			unsigned data_len, int len, u16 id, u16 offset);
int hermes_read_ltv(hermes_t *hw, int bap, u16 rid, unsigned buflen,
		    u16 *length, void *buf);
int hermes_write_ltv(hermes_t *hw, int bap, u16 rid,
		      u16 length, const void *value);

/* Inline functions */

static inline int hermes_present(hermes_t *hw)
{
	return hermes_read_regn(hw, SWSUPPORT0) == HERMES_MAGIC;
}

static inline void hermes_set_irqmask(hermes_t *hw, u16 events)
{
	hw->inten = events;
	hermes_write_regn(hw, INTEN, events);
}

static inline int hermes_enable_port(hermes_t *hw, int port)
{
	return hermes_docmd_wait(hw, HERMES_CMD_ENABLE | (port << 8),
				 0, NULL);
}

static inline int hermes_disable_port(hermes_t *hw, int port)
{
	return hermes_docmd_wait(hw, HERMES_CMD_DISABLE | (port << 8), 
				 0, NULL);
}

/* Initiate an INQUIRE command (tallies or scan).  The result will come as an
 * information frame in __orinoco_ev_info() */
static inline int hermes_inquire(hermes_t *hw, u16 rid)
{
	return hermes_docmd_wait(hw, HERMES_CMD_INQUIRE, rid, NULL);
}

#define HERMES_BYTES_TO_RECLEN(n) ( (((n)+1)/2) + 1 )
#define HERMES_RECLEN_TO_BYTES(n) ( ((n)-1) * 2 )

/* Note that for the next two, the count is in 16-bit words, not bytes */
static inline void hermes_read_words(struct hermes *hw, int off, void *buf, unsigned count)
{
	off = off << hw->reg_spacing;
	ioread16_rep(hw->iobase + off, buf, count);
}

static inline void hermes_write_words(struct hermes *hw, int off, const void *buf, unsigned count)
{
	off = off << hw->reg_spacing;
	iowrite16_rep(hw->iobase + off, buf, count);
}

static inline void hermes_clear_words(struct hermes *hw, int off, unsigned count)
{
	unsigned i;

	off = off << hw->reg_spacing;

	for (i = 0; i < count; i++)
		iowrite16(0, hw->iobase + off);
}

#define HERMES_READ_RECORD(hw, bap, rid, buf) \
	(hermes_read_ltv((hw),(bap),(rid), sizeof(*buf), NULL, (buf)))
#define HERMES_WRITE_RECORD(hw, bap, rid, buf) \
	(hermes_write_ltv((hw),(bap),(rid),HERMES_BYTES_TO_RECLEN(sizeof(*buf)),(buf)))

static inline int hermes_read_wordrec(hermes_t *hw, int bap, u16 rid, u16 *word)
{
	__le16 rec;
	int err;

	err = HERMES_READ_RECORD(hw, bap, rid, &rec);
	*word = le16_to_cpu(rec);
	return err;
}

static inline int hermes_write_wordrec(hermes_t *hw, int bap, u16 rid, u16 word)
{
	__le16 rec = cpu_to_le16(word);
	return HERMES_WRITE_RECORD(hw, bap, rid, &rec);
}

#else /* ! __KERNEL__ */

/* These are provided for the benefit of userspace drivers and testing programs
   which use ioperm() or iopl() */

#define hermes_read_reg(base, off) (inw((base) + (off)))
#define hermes_write_reg(base, off, val) (outw((val), (base) + (off)))

#define hermes_read_regn(base, name) (hermes_read_reg((base), HERMES_##name))
#define hermes_write_regn(base, name, val) (hermes_write_reg((base), HERMES_##name, (val)))

/* Note that for the next two, the count is in 16-bit words, not bytes */
#define hermes_read_data(base, off, buf, count) (insw((base) + (off), (buf), (count)))
#define hermes_write_data(base, off, buf, count) (outsw((base) + (off), (buf), (count)))

#endif /* ! __KERNEL__ */

#endif  /* _HERMES_H */