2 Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
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.
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.
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.
23 Abstract: rt2x00 generic register information.
33 ANTENNA_SW_DIVERSITY = 0,
36 ANTENNA_HW_DIVERSITY = 3,
44 LED_MODE_TXRX_ACTIVITY = 1,
45 LED_MODE_SIGNAL_STRENGTH = 2,
69 * Additional device states, these values are
70 * not strict since they are not directly passed
77 STATE_RADIO_RX_ON_LINK,
78 STATE_RADIO_RX_OFF_LINK,
94 * Cipher types for hardware encryption
103 * The following fields were added by rt61pci and rt73usb.
107 CIPHER_TKIP_NO_MIC = 7,
112 * We store the position of a register field inside a field structure,
113 * This will simplify the process of setting and reading a certain field
114 * inside the register while making sure the process remains byte order safe.
116 struct rt2x00_field8 {
121 struct rt2x00_field16 {
126 struct rt2x00_field32 {
132 * Power of two check, this will check
133 * if the mask that has been given contains and contiguous set of bits.
134 * Note that we cannot use the is_power_of_2() function since this
135 * check must be done at compile-time.
137 #define is_power_of_two(x) ( !((x) & ((x)-1)) )
138 #define low_bit_mask(x) ( ((x)-1) & ~(x) )
139 #define is_valid_mask(x) is_power_of_two(1 + (x) + low_bit_mask(x))
142 * Macro's to find first set bit in a variable.
143 * These macro's behaves the same as the __ffs() function with
144 * the most important difference that this is done during
145 * compile-time rather then run-time.
147 #define compile_ffs2(__x) \
148 ( ((__x) & 0x1) ? 0 : 1 )
150 #define compile_ffs4(__x) \
152 compile_ffs2(__x) : (compile_ffs2((__x) >> 2) + 2) )
154 #define compile_ffs8(__x) \
156 compile_ffs4(__x) : (compile_ffs4((__x) >> 4) + 4) )
158 #define compile_ffs16(__x) \
160 compile_ffs8(__x) : (compile_ffs8((__x) >> 8) + 8) )
162 #define compile_ffs32(__x) \
163 ( ((__x) & 0xffff) ? \
164 compile_ffs16(__x) : (compile_ffs16((__x) >> 16) + 16) )
167 * This macro will check the requirements for the FIELD{8,16,32} macros
168 * The mask should be a constant non-zero contiguous set of bits which
169 * does not exceed the given typelimit.
171 #define FIELD_CHECK(__mask, __type) \
172 BUILD_BUG_ON(!__builtin_constant_p(__mask) || \
174 !is_valid_mask(__mask) || \
175 (__mask) != (__type)(__mask)) \
177 #define FIELD8(__mask) \
179 FIELD_CHECK(__mask, u8); \
180 (struct rt2x00_field8) { \
181 compile_ffs8(__mask), (__mask) \
185 #define FIELD16(__mask) \
187 FIELD_CHECK(__mask, u16); \
188 (struct rt2x00_field16) { \
189 compile_ffs16(__mask), (__mask) \
193 #define FIELD32(__mask) \
195 FIELD_CHECK(__mask, u32); \
196 (struct rt2x00_field32) { \
197 compile_ffs32(__mask), (__mask) \
201 static inline void rt2x00_set_field32(u32 *reg,
202 const struct rt2x00_field32 field,
205 *reg &= ~(field.bit_mask);
206 *reg |= (value << field.bit_offset) & field.bit_mask;
209 static inline u32 rt2x00_get_field32(const u32 reg,
210 const struct rt2x00_field32 field)
212 return (reg & field.bit_mask) >> field.bit_offset;
215 static inline void rt2x00_set_field16(u16 *reg,
216 const struct rt2x00_field16 field,
219 *reg &= ~(field.bit_mask);
220 *reg |= (value << field.bit_offset) & field.bit_mask;
223 static inline u16 rt2x00_get_field16(const u16 reg,
224 const struct rt2x00_field16 field)
226 return (reg & field.bit_mask) >> field.bit_offset;
229 static inline void rt2x00_set_field8(u8 *reg,
230 const struct rt2x00_field8 field,
233 *reg &= ~(field.bit_mask);
234 *reg |= (value << field.bit_offset) & field.bit_mask;
237 static inline u8 rt2x00_get_field8(const u8 reg,
238 const struct rt2x00_field8 field)
240 return (reg & field.bit_mask) >> field.bit_offset;
243 #endif /* RT2X00REG_H */