drivers/net/wireless/zd1211rw/zd_types.h

   1 /* zd_types.h
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation; either version 2 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program; if not, write to the Free Software
  15  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  16  */
  17
  18 #ifndef _ZD_TYPES_H
  19 #define _ZD_TYPES_H
  20
  21 #include <linux/types.h>
  22
  23 /* We have three register spaces mapped into the overall USB address space of
  24  * 64K words (16-bit values). There is the control register space of
  25  * double-word registers, the eeprom register space and the firmware register
  26  * space. The control register space is byte mapped, the others are word
  27  * mapped.
  28  *
  29  * For that reason, we are using byte offsets for control registers and word
  30  * offsets for everything else.
  31  */
  32
  33 typedef u32 __nocast zd_addr_t;
  34
  35 enum {
  36         ADDR_BASE_MASK          = 0xff000000,
  37         ADDR_OFFSET_MASK        = 0x0000ffff,
  38         ADDR_ZERO_MASK          = 0x00ff0000,
  39         NULL_BASE               = 0x00000000,
  40         USB_BASE                = 0x01000000,
  41         CR_BASE                 = 0x02000000,
  42         CR_MAX_OFFSET           = 0x0b30,
  43         E2P_BASE                = 0x03000000,
  44         E2P_MAX_OFFSET          = 0x007e,
  45         FW_BASE                 = 0x04000000,
  46         FW_MAX_OFFSET           = 0x0005,
  47 };
  48
  49 #define ZD_ADDR_BASE(addr) ((u32)(addr) & ADDR_BASE_MASK)
  50 #define ZD_OFFSET(addr) ((u32)(addr) & ADDR_OFFSET_MASK)
  51
  52 #define ZD_ADDR(base, offset) \
  53         ((zd_addr_t)(((base) & ADDR_BASE_MASK) | ((offset) & ADDR_OFFSET_MASK)))
  54
  55 #define ZD_NULL_ADDR    ((zd_addr_t)0)
  56 #define USB_REG(offset)  ZD_ADDR(USB_BASE, offset)      /* word addressing */
  57 #define CTL_REG(offset)  ZD_ADDR(CR_BASE, offset)       /* byte addressing */
  58 #define E2P_DATA(offset)  ZD_ADDR(E2P_BASE, offset)     /* word addressing */
  59 #define FW_REG(offset)   ZD_ADDR(FW_BASE, offset)       /* word addressing */
  60
  61 static inline zd_addr_t zd_inc_word(zd_addr_t addr)
  62 {
  63         u32 base = ZD_ADDR_BASE(addr);
  64         u32 offset = ZD_OFFSET(addr);
  65
  66         offset += base == CR_BASE ? 2 : 1;
  67
  68         return base | offset;
  69 }
  70
  71 #endif /* _ZD_TYPES_H */