drivers/net/wireless/hermes.h

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