drivers/net/wireless/rt2x00/rt2x00reg.h

   1 /*
   2         Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
   3         <http://rt2x00.serialmonkey.com>
   4
   5         This program is free software; you can redistribute it and/or modify
   6         it under the terms of the GNU General Public License as published by
   7         the Free Software Foundation; either version 2 of the License, or
   8         (at your option) any later version.
   9
  10         This program is distributed in the hope that it will be useful,
  11         but WITHOUT ANY WARRANTY; without even the implied warranty of
  12         MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13         GNU General Public License for more details.
  14
  15         You should have received a copy of the GNU General Public License
  16         along with this program; if not, write to the
  17         Free Software Foundation, Inc.,
  18         59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  19  */
  20
  21 /*
  22         Module: rt2x00
  23         Abstract: rt2x00 generic register information.
  24  */
  25
  26 #ifndef RT2X00REG_H
  27 #define RT2X00REG_H
  28
  29 /*
  30  * RX crypto status
  31  */
  32 enum rx_crypto {
  33         RX_CRYPTO_SUCCESS = 0,
  34         RX_CRYPTO_FAIL_ICV = 1,
  35         RX_CRYPTO_FAIL_MIC = 2,
  36         RX_CRYPTO_FAIL_KEY = 3,
  37 };
  38
  39 /*
  40  * Antenna values
  41  */
  42 enum antenna {
  43         ANTENNA_SW_DIVERSITY = 0,
  44         ANTENNA_A = 1,
  45         ANTENNA_B = 2,
  46         ANTENNA_HW_DIVERSITY = 3,
  47 };
  48
  49 /*
  50  * Led mode values.
  51  */
  52 enum led_mode {
  53         LED_MODE_DEFAULT = 0,
  54         LED_MODE_TXRX_ACTIVITY = 1,
  55         LED_MODE_SIGNAL_STRENGTH = 2,
  56         LED_MODE_ASUS = 3,
  57         LED_MODE_ALPHA = 4,
  58 };
  59
  60 /*
  61  * TSF sync values
  62  */
  63 enum tsf_sync {
  64         TSF_SYNC_NONE = 0,
  65         TSF_SYNC_INFRA = 1,
  66         TSF_SYNC_BEACON = 2,
  67 };
  68
  69 /*
  70  * Device states
  71  */
  72 enum dev_state {
  73         STATE_DEEP_SLEEP = 0,
  74         STATE_SLEEP = 1,
  75         STATE_STANDBY = 2,
  76         STATE_AWAKE = 3,
  77
  78 /*
  79  * Additional device states, these values are
  80  * not strict since they are not directly passed
  81  * into the device.
  82  */
  83         STATE_RADIO_ON,
  84         STATE_RADIO_OFF,
  85         STATE_RADIO_RX_ON,
  86         STATE_RADIO_RX_OFF,
  87         STATE_RADIO_RX_ON_LINK,
  88         STATE_RADIO_RX_OFF_LINK,
  89         STATE_RADIO_IRQ_ON,
  90         STATE_RADIO_IRQ_OFF,
  91 };
  92
  93 /*
  94  * IFS backoff values
  95  */
  96 enum ifs {
  97         IFS_BACKOFF = 0,
  98         IFS_SIFS = 1,
  99         IFS_NEW_BACKOFF = 2,
 100         IFS_NONE = 3,
 101 };
 102
 103 /*
 104  * Cipher types for hardware encryption
 105  */
 106 enum cipher {
 107         CIPHER_NONE = 0,
 108         CIPHER_WEP64 = 1,
 109         CIPHER_WEP128 = 2,
 110         CIPHER_TKIP = 3,
 111         CIPHER_AES = 4,
 112 /*
 113  * The following fields were added by rt61pci and rt73usb.
 114  */
 115         CIPHER_CKIP64 = 5,
 116         CIPHER_CKIP128 = 6,
 117         CIPHER_TKIP_NO_MIC = 7, /* Don't send to device */
 118
 119 /*
 120  * Max cipher type.
 121  * Note that CIPHER_NONE isn't counted, and CKIP64 and CKIP128
 122  * are excluded due to limitations in mac80211.
 123  */
 124         CIPHER_MAX = 4,
 125 };
 126
 127 /*
 128  * Register handlers.
 129  * We store the position of a register field inside a field structure,
 130  * This will simplify the process of setting and reading a certain field
 131  * inside the register while making sure the process remains byte order safe.
 132  */
 133 struct rt2x00_field8 {
 134         u8 bit_offset;
 135         u8 bit_mask;
 136 };
 137
 138 struct rt2x00_field16 {
 139         u16 bit_offset;
 140         u16 bit_mask;
 141 };
 142
 143 struct rt2x00_field32 {
 144         u32 bit_offset;
 145         u32 bit_mask;
 146 };
 147
 148 /*
 149  * Power of two check, this will check
 150  * if the mask that has been given contains and contiguous set of bits.
 151  * Note that we cannot use the is_power_of_2() function since this
 152  * check must be done at compile-time.
 153  */
 154 #define is_power_of_two(x)      ( !((x) & ((x)-1)) )
 155 #define low_bit_mask(x)         ( ((x)-1) & ~(x) )
 156 #define is_valid_mask(x)        is_power_of_two(1 + (x) + low_bit_mask(x))
 157
 158 /*
 159  * Macro's to find first set bit in a variable.
 160  * These macro's behaves the same as the __ffs() function with
 161  * the most important difference that this is done during
 162  * compile-time rather then run-time.
 163  */
 164 #define compile_ffs2(__x) \
 165         __builtin_choose_expr(((__x) & 0x1), 0, 1)
 166
 167 #define compile_ffs4(__x) \
 168         __builtin_choose_expr(((__x) & 0x3), \
 169                               (compile_ffs2((__x))), \
 170                               (compile_ffs2((__x) >> 2) + 2))
 171
 172 #define compile_ffs8(__x) \
 173         __builtin_choose_expr(((__x) & 0xf), \
 174                               (compile_ffs4((__x))), \
 175                               (compile_ffs4((__x) >> 4) + 4))
 176
 177 #define compile_ffs16(__x) \
 178         __builtin_choose_expr(((__x) & 0xff), \
 179                               (compile_ffs8((__x))), \
 180                               (compile_ffs8((__x) >> 8) + 8))
 181
 182 #define compile_ffs32(__x) \
 183         __builtin_choose_expr(((__x) & 0xffff), \
 184                               (compile_ffs16((__x))), \
 185                               (compile_ffs16((__x) >> 16) + 16))
 186
 187 /*
 188  * This macro will check the requirements for the FIELD{8,16,32} macros
 189  * The mask should be a constant non-zero contiguous set of bits which
 190  * does not exceed the given typelimit.
 191  */
 192 #define FIELD_CHECK(__mask, __type)                     \
 193         BUILD_BUG_ON(!__builtin_constant_p(__mask) ||   \
 194                      !(__mask) ||                       \
 195                      !is_valid_mask(__mask) ||          \
 196                      (__mask) != (__type)(__mask))      \
 197
 198 #define FIELD8(__mask)                          \
 199 ({                                              \
 200         FIELD_CHECK(__mask, u8);                \
 201         (struct rt2x00_field8) {                \
 202                 compile_ffs8(__mask), (__mask)  \
 203         };                                      \
 204 })
 205
 206 #define FIELD16(__mask)                         \
 207 ({                                              \
 208         FIELD_CHECK(__mask, u16);               \
 209         (struct rt2x00_field16) {               \
 210                 compile_ffs16(__mask), (__mask) \
 211         };                                      \
 212 })
 213
 214 #define FIELD32(__mask)                         \
 215 ({                                              \
 216         FIELD_CHECK(__mask, u32);               \
 217         (struct rt2x00_field32) {               \
 218                 compile_ffs32(__mask), (__mask) \
 219         };                                      \
 220 })
 221
 222 #define SET_FIELD(__reg, __type, __field, __value)\
 223 ({                                              \
 224         typecheck(__type, __field);             \
 225         *(__reg) &= ~((__field).bit_mask);      \
 226         *(__reg) |= ((__value) <<               \
 227             ((__field).bit_offset)) &           \
 228             ((__field).bit_mask);               \
 229 })
 230
 231 #define GET_FIELD(__reg, __type, __field)       \
 232 ({                                              \
 233         typecheck(__type, __field);             \
 234         ((__reg) & ((__field).bit_mask)) >>     \
 235             ((__field).bit_offset);             \
 236 })
 237
 238 #define rt2x00_set_field32(__reg, __field, __value) \
 239         SET_FIELD(__reg, struct rt2x00_field32, __field, __value)
 240 #define rt2x00_get_field32(__reg, __field) \
 241         GET_FIELD(__reg, struct rt2x00_field32, __field)
 242
 243 #define rt2x00_set_field16(__reg, __field, __value) \
 244         SET_FIELD(__reg, struct rt2x00_field16, __field, __value)
 245 #define rt2x00_get_field16(__reg, __field) \
 246         GET_FIELD(__reg, struct rt2x00_field16, __field)
 247
 248 #define rt2x00_set_field8(__reg, __field, __value) \
 249         SET_FIELD(__reg, struct rt2x00_field8, __field, __value)
 250 #define rt2x00_get_field8(__reg, __field) \
 251         GET_FIELD(__reg, struct rt2x00_field8, __field)
 252
 253 #endif /* RT2X00REG_H */