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hermes.h
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1 /* hermes.h
2  *
3  * Driver core for the "Hermes" wireless MAC controller, as used in
4  * the Lucent Orinoco and Cabletron RoamAbout cards. It should also
5  * work on the hfa3841 and hfa3842 MAC controller chips used in the
6  * Prism I & II chipsets.
7  *
8  * This is not a complete driver, just low-level access routines for
9  * the MAC controller itself.
10  *
11  * Based on the prism2 driver from Absolute Value Systems' linux-wlan
12  * project, the Linux wvlan_cs driver, Lucent's HCF-Light
13  * (wvlan_hcf.c) library, and the NetBSD wireless driver.
14  *
15  * Copyright (C) 2000, David Gibson, Linuxcare Australia.
16  * (C) Copyright David Gibson, IBM Corp. 2001-2003.
17  *
18  * Portions taken from hfa384x.h.
19  * Copyright (C) 1999 AbsoluteValue Systems, Inc. All Rights Reserved.
20  *
21  * This file distributed under the GPL, version 2.
22  */
23 
24 #ifndef _HERMES_H
25 #define _HERMES_H
26 
27 /* Notes on locking:
28  *
29  * As a module of low level hardware access routines, there is no
30  * locking. Users of this module should ensure that they serialize
31  * access to the hermes structure, and to the hardware
32 */
33 
34 #include <linux/if_ether.h>
35 #include <linux/io.h>
36 
37 /*
38  * Limits and constants
39  */
40 #define HERMES_ALLOC_LEN_MIN (4)
41 #define HERMES_ALLOC_LEN_MAX (2400)
42 #define HERMES_LTV_LEN_MAX (34)
43 #define HERMES_BAP_DATALEN_MAX (4096)
44 #define HERMES_BAP_OFFSET_MAX (4096)
45 #define HERMES_PORTID_MAX (7)
46 #define HERMES_NUMPORTS_MAX (HERMES_PORTID_MAX + 1)
47 #define HERMES_PDR_LEN_MAX (260) /* in bytes, from EK */
48 #define HERMES_PDA_RECS_MAX (200) /* a guess */
49 #define HERMES_PDA_LEN_MAX (1024) /* in bytes, from EK */
50 #define HERMES_SCANRESULT_MAX (35)
51 #define HERMES_CHINFORESULT_MAX (8)
52 #define HERMES_MAX_MULTICAST (16)
53 #define HERMES_MAGIC (0x7d1f)
54 
55 /*
56  * Hermes register offsets
57  */
58 #define HERMES_CMD (0x00)
59 #define HERMES_PARAM0 (0x02)
60 #define HERMES_PARAM1 (0x04)
61 #define HERMES_PARAM2 (0x06)
62 #define HERMES_STATUS (0x08)
63 #define HERMES_RESP0 (0x0A)
64 #define HERMES_RESP1 (0x0C)
65 #define HERMES_RESP2 (0x0E)
66 #define HERMES_INFOFID (0x10)
67 #define HERMES_RXFID (0x20)
68 #define HERMES_ALLOCFID (0x22)
69 #define HERMES_TXCOMPLFID (0x24)
70 #define HERMES_SELECT0 (0x18)
71 #define HERMES_OFFSET0 (0x1C)
72 #define HERMES_DATA0 (0x36)
73 #define HERMES_SELECT1 (0x1A)
74 #define HERMES_OFFSET1 (0x1E)
75 #define HERMES_DATA1 (0x38)
76 #define HERMES_EVSTAT (0x30)
77 #define HERMES_INTEN (0x32)
78 #define HERMES_EVACK (0x34)
79 #define HERMES_CONTROL (0x14)
80 #define HERMES_SWSUPPORT0 (0x28)
81 #define HERMES_SWSUPPORT1 (0x2A)
82 #define HERMES_SWSUPPORT2 (0x2C)
83 #define HERMES_AUXPAGE (0x3A)
84 #define HERMES_AUXOFFSET (0x3C)
85 #define HERMES_AUXDATA (0x3E)
86 
87 /*
88  * CMD register bitmasks
89  */
90 #define HERMES_CMD_BUSY (0x8000)
91 #define HERMES_CMD_AINFO (0x7f00)
92 #define HERMES_CMD_MACPORT (0x0700)
93 #define HERMES_CMD_RECL (0x0100)
94 #define HERMES_CMD_WRITE (0x0100)
95 #define HERMES_CMD_PROGMODE (0x0300)
96 #define HERMES_CMD_CMDCODE (0x003f)
97 
98 /*
99  * STATUS register bitmasks
100  */
101 #define HERMES_STATUS_RESULT (0x7f00)
102 #define HERMES_STATUS_CMDCODE (0x003f)
103 
104 /*
105  * OFFSET register bitmasks
106  */
107 #define HERMES_OFFSET_BUSY (0x8000)
108 #define HERMES_OFFSET_ERR (0x4000)
109 #define HERMES_OFFSET_DATAOFF (0x0ffe)
110 
111 /*
112  * Event register bitmasks (INTEN, EVSTAT, EVACK)
113  */
114 #define HERMES_EV_TICK (0x8000)
115 #define HERMES_EV_WTERR (0x4000)
116 #define HERMES_EV_INFDROP (0x2000)
117 #define HERMES_EV_INFO (0x0080)
118 #define HERMES_EV_DTIM (0x0020)
119 #define HERMES_EV_CMD (0x0010)
120 #define HERMES_EV_ALLOC (0x0008)
121 #define HERMES_EV_TXEXC (0x0004)
122 #define HERMES_EV_TX (0x0002)
123 #define HERMES_EV_RX (0x0001)
124 
125 /*
126  * Command codes
127  */
128 /*--- Controller Commands ----------------------------*/
129 #define HERMES_CMD_INIT (0x0000)
130 #define HERMES_CMD_ENABLE (0x0001)
131 #define HERMES_CMD_DISABLE (0x0002)
132 #define HERMES_CMD_DIAG (0x0003)
133 
134 /*--- Buffer Mgmt Commands ---------------------------*/
135 #define HERMES_CMD_ALLOC (0x000A)
136 #define HERMES_CMD_TX (0x000B)
137 
138 /*--- Regulate Commands ------------------------------*/
139 #define HERMES_CMD_NOTIFY (0x0010)
140 #define HERMES_CMD_INQUIRE (0x0011)
141 
142 /*--- Configure Commands -----------------------------*/
143 #define HERMES_CMD_ACCESS (0x0021)
144 #define HERMES_CMD_DOWNLD (0x0022)
145 
146 /*--- Serial I/O Commands ----------------------------*/
147 #define HERMES_CMD_READMIF (0x0030)
148 #define HERMES_CMD_WRITEMIF (0x0031)
149 
150 /*--- Debugging Commands -----------------------------*/
151 #define HERMES_CMD_TEST (0x0038)
152 
153 
154 /* Test command arguments */
155 #define HERMES_TEST_SET_CHANNEL 0x0800
156 #define HERMES_TEST_MONITOR 0x0b00
157 #define HERMES_TEST_STOP 0x0f00
158 
159 /* Authentication algorithms */
160 #define HERMES_AUTH_OPEN 1
161 #define HERMES_AUTH_SHARED_KEY 2
162 
163 /* WEP settings */
164 #define HERMES_WEP_PRIVACY_INVOKED 0x0001
165 #define HERMES_WEP_EXCL_UNENCRYPTED 0x0002
166 #define HERMES_WEP_HOST_ENCRYPT 0x0010
167 #define HERMES_WEP_HOST_DECRYPT 0x0080
168 
169 /* Symbol hostscan options */
170 #define HERMES_HOSTSCAN_SYMBOL_5SEC 0x0001
171 #define HERMES_HOSTSCAN_SYMBOL_ONCE 0x0002
172 #define HERMES_HOSTSCAN_SYMBOL_PASSIVE 0x0040
173 #define HERMES_HOSTSCAN_SYMBOL_BCAST 0x0080
174 
175 /*
176  * Frame structures and constants
177  */
178 
179 #define HERMES_DESCRIPTOR_OFFSET 0
180 #define HERMES_802_11_OFFSET (14)
181 #define HERMES_802_3_OFFSET (14 + 32)
182 #define HERMES_802_2_OFFSET (14 + 32 + 14)
183 #define HERMES_TXCNTL2_OFFSET (HERMES_802_3_OFFSET - 2)
184 
185 #define HERMES_RXSTAT_ERR (0x0003)
186 #define HERMES_RXSTAT_BADCRC (0x0001)
187 #define HERMES_RXSTAT_UNDECRYPTABLE (0x0002)
188 #define HERMES_RXSTAT_MIC (0x0010) /* Frame contains MIC */
189 #define HERMES_RXSTAT_MACPORT (0x0700)
190 #define HERMES_RXSTAT_PCF (0x1000) /* Frame was received in CF period */
191 #define HERMES_RXSTAT_MIC_KEY_ID (0x1800) /* MIC key used */
192 #define HERMES_RXSTAT_MSGTYPE (0xE000)
193 #define HERMES_RXSTAT_1042 (0x2000) /* RFC-1042 frame */
194 #define HERMES_RXSTAT_TUNNEL (0x4000) /* bridge-tunnel encoded frame */
195 #define HERMES_RXSTAT_WMP (0x6000) /* Wavelan-II Management Protocol frame */
196 
197 /* Shift amount for key ID in RXSTAT and TXCTRL */
198 #define HERMES_MIC_KEY_ID_SHIFT 11
199 
200 struct hermes_tx_descriptor {
201  __le16 status;
202  __le16 reserved1;
203  __le16 reserved2;
204  __le32 sw_support;
205  u8 retry_count;
206  u8 tx_rate;
207  __le16 tx_control;
208 } __packed;
209 
210 #define HERMES_TXSTAT_RETRYERR (0x0001)
211 #define HERMES_TXSTAT_AGEDERR (0x0002)
212 #define HERMES_TXSTAT_DISCON (0x0004)
213 #define HERMES_TXSTAT_FORMERR (0x0008)
214 
215 #define HERMES_TXCTRL_TX_OK (0x0002) /* ?? interrupt on Tx complete */
216 #define HERMES_TXCTRL_TX_EX (0x0004) /* ?? interrupt on Tx exception */
217 #define HERMES_TXCTRL_802_11 (0x0008) /* We supply 802.11 header */
218 #define HERMES_TXCTRL_MIC (0x0010) /* 802.3 + TKIP */
219 #define HERMES_TXCTRL_MIC_KEY_ID (0x1800) /* MIC Key ID mask */
220 #define HERMES_TXCTRL_ALT_RTRY (0x0020)
221 
222 /* Inquiry constants and data types */
223 
224 #define HERMES_INQ_TALLIES (0xF100)
225 #define HERMES_INQ_SCAN (0xF101)
226 #define HERMES_INQ_CHANNELINFO (0xF102)
227 #define HERMES_INQ_HOSTSCAN (0xF103)
228 #define HERMES_INQ_HOSTSCAN_SYMBOL (0xF104)
229 #define HERMES_INQ_LINKSTATUS (0xF200)
230 #define HERMES_INQ_SEC_STAT_AGERE (0xF202)
231 
232 struct hermes_tallies_frame {
233  __le16 TxUnicastFrames;
234  __le16 TxMulticastFrames;
235  __le16 TxFragments;
236  __le16 TxUnicastOctets;
237  __le16 TxMulticastOctets;
238  __le16 TxDeferredTransmissions;
239  __le16 TxSingleRetryFrames;
240  __le16 TxMultipleRetryFrames;
241  __le16 TxRetryLimitExceeded;
242  __le16 TxDiscards;
243  __le16 RxUnicastFrames;
244  __le16 RxMulticastFrames;
245  __le16 RxFragments;
246  __le16 RxUnicastOctets;
247  __le16 RxMulticastOctets;
248  __le16 RxFCSErrors;
249  __le16 RxDiscards_NoBuffer;
250  __le16 TxDiscardsWrongSA;
251  __le16 RxWEPUndecryptable;
252  __le16 RxMsgInMsgFragments;
253  __le16 RxMsgInBadMsgFragments;
254  /* Those last are probably not available in very old firmwares */
255  __le16 RxDiscards_WEPICVError;
256  __le16 RxDiscards_WEPExcluded;
257 } __packed;
258 
259 /* Grabbed from wlan-ng - Thanks Mark... - Jean II
260  * This is the result of a scan inquiry command */
261 /* Structure describing info about an Access Point */
262 struct prism2_scan_apinfo {
263  __le16 channel; /* Channel where the AP sits */
264  __le16 noise; /* Noise level */
265  __le16 level; /* Signal level */
266  u8 bssid[ETH_ALEN]; /* MAC address of the Access Point */
267  __le16 beacon_interv; /* Beacon interval */
268  __le16 capabilities; /* Capabilities */
269  __le16 essid_len; /* ESSID length */
270  u8 essid[32]; /* ESSID of the network */
271  u8 rates[10]; /* Bit rate supported */
272  __le16 proberesp_rate; /* Data rate of the response frame */
273  __le16 atim; /* ATIM window time, Kus (hostscan only) */
274 } __packed;
275 
276 /* Same stuff for the Lucent/Agere card.
277  * Thanks to h1kari <h1kari AT dachb0den.com> - Jean II */
278 struct agere_scan_apinfo {
279  __le16 channel; /* Channel where the AP sits */
280  __le16 noise; /* Noise level */
281  __le16 level; /* Signal level */
282  u8 bssid[ETH_ALEN]; /* MAC address of the Access Point */
283  __le16 beacon_interv; /* Beacon interval */
284  __le16 capabilities; /* Capabilities */
285  /* bits: 0-ess, 1-ibss, 4-privacy [wep] */
286  __le16 essid_len; /* ESSID length */
287  u8 essid[32]; /* ESSID of the network */
288 } __packed;
289 
290 /* Moustafa: Scan structure for Symbol cards */
291 struct symbol_scan_apinfo {
292  u8 channel; /* Channel where the AP sits */
293  u8 unknown1; /* 8 in 2.9x and 3.9x f/w, 0 otherwise */
294  __le16 noise; /* Noise level */
295  __le16 level; /* Signal level */
296  u8 bssid[ETH_ALEN]; /* MAC address of the Access Point */
297  __le16 beacon_interv; /* Beacon interval */
298  __le16 capabilities; /* Capabilities */
299  /* bits: 0-ess, 1-ibss, 4-privacy [wep] */
300  __le16 essid_len; /* ESSID length */
301  u8 essid[32]; /* ESSID of the network */
302  __le16 rates[5]; /* Bit rate supported */
303  __le16 basic_rates; /* Basic rates bitmask */
304  u8 unknown2[6]; /* Always FF:FF:FF:FF:00:00 */
305  u8 unknown3[8]; /* Always 0, appeared in f/w 3.91-68 */
306 } __packed;
307 
308 union hermes_scan_info {
309  struct agere_scan_apinfo a;
310  struct prism2_scan_apinfo p;
311  struct symbol_scan_apinfo s;
312 };
313 
314 /* Extended scan struct for HERMES_INQ_CHANNELINFO.
315  * wl_lkm calls this an ACS scan (Automatic Channel Select).
316  * Keep out of union hermes_scan_info because it is much bigger than
317  * the older scan structures. */
318 struct agere_ext_scan_info {
319  __le16 reserved0;
320 
321  u8 noise;
322  u8 level;
323  u8 rx_flow;
324  u8 rate;
325  __le16 reserved1[2];
326 
327  __le16 frame_control;
328  __le16 dur_id;
329  u8 addr1[ETH_ALEN];
330  u8 addr2[ETH_ALEN];
331  u8 bssid[ETH_ALEN];
332  __le16 sequence;
333  u8 addr4[ETH_ALEN];
334 
335  __le16 data_length;
336 
337  /* Next 3 fields do not get filled in. */
338  u8 daddr[ETH_ALEN];
339  u8 saddr[ETH_ALEN];
340  __le16 len_type;
341 
342  __le64 timestamp;
343  __le16 beacon_interval;
344  __le16 capabilities;
345  u8 data[0];
346 } __packed;
347 
348 #define HERMES_LINKSTATUS_NOT_CONNECTED (0x0000)
349 #define HERMES_LINKSTATUS_CONNECTED (0x0001)
350 #define HERMES_LINKSTATUS_DISCONNECTED (0x0002)
351 #define HERMES_LINKSTATUS_AP_CHANGE (0x0003)
352 #define HERMES_LINKSTATUS_AP_OUT_OF_RANGE (0x0004)
353 #define HERMES_LINKSTATUS_AP_IN_RANGE (0x0005)
354 #define HERMES_LINKSTATUS_ASSOC_FAILED (0x0006)
355 
356 struct hermes_linkstatus {
357  __le16 linkstatus; /* Link status */
358 } __packed;
359 
360 struct hermes_response {
361  u16 status, resp0, resp1, resp2;
362 };
363 
364 /* "ID" structure - used for ESSID and station nickname */
365 struct hermes_idstring {
366  __le16 len;
367  __le16 val[16];
368 } __packed;
369 
370 struct hermes_multicast {
371  u8 addr[HERMES_MAX_MULTICAST][ETH_ALEN];
372 } __packed;
373 
374 /* Timeouts */
375 #define HERMES_BAP_BUSY_TIMEOUT (10000) /* In iterations of ~1us */
376 
377 struct hermes;
378 
379 /* Functions to access hardware */
380 struct hermes_ops {
381  int (*init)(struct hermes *hw);
382  int (*cmd_wait)(struct hermes *hw, u16 cmd, u16 parm0,
383  struct hermes_response *resp);
384  int (*init_cmd_wait)(struct hermes *hw, u16 cmd,
385  u16 parm0, u16 parm1, u16 parm2,
386  struct hermes_response *resp);
387  int (*allocate)(struct hermes *hw, u16 size, u16 *fid);
388  int (*read_ltv)(struct hermes *hw, int bap, u16 rid, unsigned buflen,
389  u16 *length, void *buf);
390  int (*write_ltv)(struct hermes *hw, int bap, u16 rid,
391  u16 length, const void *value);
392  int (*bap_pread)(struct hermes *hw, int bap, void *buf, int len,
393  u16 id, u16 offset);
394  int (*bap_pwrite)(struct hermes *hw, int bap, const void *buf,
395  int len, u16 id, u16 offset);
396  int (*read_pda)(struct hermes *hw, __le16 *pda,
397  u32 pda_addr, u16 pda_len);
398  int (*program_init)(struct hermes *hw, u32 entry_point);
399  int (*program_end)(struct hermes *hw);
400  int (*program)(struct hermes *hw, const char *buf,
401  u32 addr, u32 len);
402  void (*lock_irqsave)(spinlock_t *lock, unsigned long *flags);
403  void (*unlock_irqrestore)(spinlock_t *lock, unsigned long *flags);
404  void (*lock_irq)(spinlock_t *lock);
405  void (*unlock_irq)(spinlock_t *lock);
406 };
407 
408 /* Basic control structure */
409 struct hermes {
410  void __iomem *iobase;
411  int reg_spacing;
412 #define HERMES_16BIT_REGSPACING 0
413 #define HERMES_32BIT_REGSPACING 1
414  u16 inten; /* Which interrupts should be enabled? */
415  bool eeprom_pda;
416  const struct hermes_ops *ops;
417  void *priv;
418 };
419 
420 /* Register access convenience macros */
421 #define hermes_read_reg(hw, off) \
422  (ioread16((hw)->iobase + ((off) << (hw)->reg_spacing)))
423 #define hermes_write_reg(hw, off, val) \
424  (iowrite16((val), (hw)->iobase + ((off) << (hw)->reg_spacing)))
425 #define hermes_read_regn(hw, name) hermes_read_reg((hw), HERMES_##name)
426 #define hermes_write_regn(hw, name, val) \
427  hermes_write_reg((hw), HERMES_##name, (val))
428 
429 /* Function prototypes */
430 void hermes_struct_init(struct hermes *hw, void __iomem *address,
431  int reg_spacing);
432 
433 /* Inline functions */
434 
435 static inline int hermes_present(struct hermes *hw)
436 {
437  return hermes_read_regn(hw, SWSUPPORT0) == HERMES_MAGIC;
438 }
439 
440 static inline void hermes_set_irqmask(struct hermes *hw, u16 events)
441 {
442  hw->inten = events;
443  hermes_write_regn(hw, INTEN, events);
444 }
445 
446 static inline int hermes_enable_port(struct hermes *hw, int port)
447 {
448  return hw->ops->cmd_wait(hw, HERMES_CMD_ENABLE | (port << 8),
449  0, NULL);
450 }
451 
452 static inline int hermes_disable_port(struct hermes *hw, int port)
453 {
454  return hw->ops->cmd_wait(hw, HERMES_CMD_DISABLE | (port << 8),
455  0, NULL);
456 }
457 
458 /* Initiate an INQUIRE command (tallies or scan). The result will come as an
459  * information frame in __orinoco_ev_info() */
460 static inline int hermes_inquire(struct hermes *hw, u16 rid)
461 {
462  return hw->ops->cmd_wait(hw, HERMES_CMD_INQUIRE, rid, NULL);
463 }
464 
465 #define HERMES_BYTES_TO_RECLEN(n) ((((n) + 1) / 2) + 1)
466 #define HERMES_RECLEN_TO_BYTES(n) (((n) - 1) * 2)
467 
468 /* Note that for the next two, the count is in 16-bit words, not bytes */
469 static inline void hermes_read_words(struct hermes *hw, int off,
470  void *buf, unsigned count)
471 {
472  off = off << hw->reg_spacing;
473  ioread16_rep(hw->iobase + off, buf, count);
474 }
475 
476 static inline void hermes_write_bytes(struct hermes *hw, int off,
477  const char *buf, unsigned count)
478 {
479  off = off << hw->reg_spacing;
480  iowrite16_rep(hw->iobase + off, buf, count >> 1);
481  if (unlikely(count & 1))
482  iowrite8(buf[count - 1], hw->iobase + off);
483 }
484 
485 static inline void hermes_clear_words(struct hermes *hw, int off,
486  unsigned count)
487 {
488  unsigned i;
489 
490  off = off << hw->reg_spacing;
491 
492  for (i = 0; i < count; i++)
493  iowrite16(0, hw->iobase + off);
494 }
495 
496 #define HERMES_READ_RECORD(hw, bap, rid, buf) \
497  (hw->ops->read_ltv((hw), (bap), (rid), sizeof(*buf), NULL, (buf)))
498 #define HERMES_WRITE_RECORD(hw, bap, rid, buf) \
499  (hw->ops->write_ltv((hw), (bap), (rid), \
500  HERMES_BYTES_TO_RECLEN(sizeof(*buf)), (buf)))
501 
502 static inline int hermes_read_wordrec(struct hermes *hw, int bap, u16 rid,
503  u16 *word)
504 {
505  __le16 rec;
506  int err;
507 
508  err = HERMES_READ_RECORD(hw, bap, rid, &rec);
509  *word = le16_to_cpu(rec);
510  return err;
511 }
512 
513 static inline int hermes_write_wordrec(struct hermes *hw, int bap, u16 rid,
514  u16 word)
515 {
516  __le16 rec = cpu_to_le16(word);
517  return HERMES_WRITE_RECORD(hw, bap, rid, &rec);
518 }
519 
520 #endif /* _HERMES_H */
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