release/src-rt-6.x.4708/linux/linux-2.6.36/drivers/net/wireless/wl12xx/wl1251_io.c

   1 /*
   2  * This file is part of wl12xx
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  *
   6  * Contact: Kalle Valo <kalle.valo@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include "wl1251.h"
  25 #include "wl1251_reg.h"
  26 #include "wl1251_io.h"
  27
  28 static enum wl12xx_acx_int_reg wl1251_io_reg_table[ACX_REG_TABLE_LEN] = {
  29         [ACX_REG_INTERRUPT_TRIG]     = (REGISTERS_BASE + 0x0474),
  30         [ACX_REG_INTERRUPT_TRIG_H]   = (REGISTERS_BASE + 0x0478),
  31         [ACX_REG_INTERRUPT_MASK]     = (REGISTERS_BASE + 0x0494),
  32         [ACX_REG_HINT_MASK_SET]      = (REGISTERS_BASE + 0x0498),
  33         [ACX_REG_HINT_MASK_CLR]      = (REGISTERS_BASE + 0x049C),
  34         [ACX_REG_INTERRUPT_NO_CLEAR] = (REGISTERS_BASE + 0x04B0),
  35         [ACX_REG_INTERRUPT_CLEAR]    = (REGISTERS_BASE + 0x04A4),
  36         [ACX_REG_INTERRUPT_ACK]      = (REGISTERS_BASE + 0x04A8),
  37         [ACX_REG_SLV_SOFT_RESET]     = (REGISTERS_BASE + 0x0000),
  38         [ACX_REG_EE_START]           = (REGISTERS_BASE + 0x080C),
  39         [ACX_REG_ECPU_CONTROL]       = (REGISTERS_BASE + 0x0804)
  40 };
  41
  42 static int wl1251_translate_reg_addr(struct wl1251 *wl, int addr)
  43 {
  44         /* If the address is lower than REGISTERS_BASE, it means that this is
  45          * a chip-specific register address, so look it up in the registers
  46          * table */
  47         if (addr < REGISTERS_BASE) {
  48                 /* Make sure we don't go over the table */
  49                 if (addr >= ACX_REG_TABLE_LEN) {
  50                         wl1251_error("address out of range (%d)", addr);
  51                         return -EINVAL;
  52                 }
  53                 addr = wl1251_io_reg_table[addr];
  54         }
  55
  56         return addr - wl->physical_reg_addr + wl->virtual_reg_addr;
  57 }
  58
  59 static int wl1251_translate_mem_addr(struct wl1251 *wl, int addr)
  60 {
  61         return addr - wl->physical_mem_addr + wl->virtual_mem_addr;
  62 }
  63
  64 void wl1251_mem_read(struct wl1251 *wl, int addr, void *buf, size_t len)
  65 {
  66         int physical;
  67
  68         physical = wl1251_translate_mem_addr(wl, addr);
  69
  70         wl->if_ops->read(wl, physical, buf, len);
  71 }
  72
  73 void wl1251_mem_write(struct wl1251 *wl, int addr, void *buf, size_t len)
  74 {
  75         int physical;
  76
  77         physical = wl1251_translate_mem_addr(wl, addr);
  78
  79         wl->if_ops->write(wl, physical, buf, len);
  80 }
  81
  82 u32 wl1251_mem_read32(struct wl1251 *wl, int addr)
  83 {
  84         return wl1251_read32(wl, wl1251_translate_mem_addr(wl, addr));
  85 }
  86
  87 void wl1251_mem_write32(struct wl1251 *wl, int addr, u32 val)
  88 {
  89         wl1251_write32(wl, wl1251_translate_mem_addr(wl, addr), val);
  90 }
  91
  92 u32 wl1251_reg_read32(struct wl1251 *wl, int addr)
  93 {
  94         return wl1251_read32(wl, wl1251_translate_reg_addr(wl, addr));
  95 }
  96
  97 void wl1251_reg_write32(struct wl1251 *wl, int addr, u32 val)
  98 {
  99         wl1251_write32(wl, wl1251_translate_reg_addr(wl, addr), val);
 100 }
 101
 102 /* Set the partitions to access the chip addresses.
 103  *
 104  * There are two VIRTUAL partitions (the memory partition and the
 105  * registers partition), which are mapped to two different areas of the
 106  * PHYSICAL (hardware) memory.  This function also makes other checks to
 107  * ensure that the partitions are not overlapping.  In the diagram below, the
 108  * memory partition comes before the register partition, but the opposite is
 109  * also supported.
 110  *
 111  *                               PHYSICAL address
 112  *                                     space
 113  *
 114  *                                    |    |
 115  *                                 ...+----+--> mem_start
 116  *          VIRTUAL address     ...   |    |
 117  *               space       ...      |    | [PART_0]
 118  *                        ...         |    |
 119  * 0x00000000 <--+----+...         ...+----+--> mem_start + mem_size
 120  *               |    |         ...   |    |
 121  *               |MEM |      ...      |    |
 122  *               |    |   ...         |    |
 123  *  part_size <--+----+...            |    | {unused area)
 124  *               |    |   ...         |    |
 125  *               |REG |      ...      |    |
 126  *  part_size    |    |         ...   |    |
 127  *      +     <--+----+...         ...+----+--> reg_start
 128  *  reg_size              ...         |    |
 129  *                           ...      |    | [PART_1]
 130  *                              ...   |    |
 131  *                                 ...+----+--> reg_start + reg_size
 132  *                                    |    |
 133  *
 134  */
 135 void wl1251_set_partition(struct wl1251 *wl,
 136                           u32 mem_start, u32 mem_size,
 137                           u32 reg_start, u32 reg_size)
 138 {
 139         struct wl1251_partition partition[2];
 140
 141         wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
 142                      mem_start, mem_size);
 143         wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
 144                      reg_start, reg_size);
 145
 146         /* Make sure that the two partitions together don't exceed the
 147          * address range */
 148         if ((mem_size + reg_size) > HW_ACCESS_MEMORY_MAX_RANGE) {
 149                 wl1251_debug(DEBUG_SPI, "Total size exceeds maximum virtual"
 150                              " address range.  Truncating partition[0].");
 151                 mem_size = HW_ACCESS_MEMORY_MAX_RANGE - reg_size;
 152                 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
 153                              mem_start, mem_size);
 154                 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
 155                              reg_start, reg_size);
 156         }
 157
 158         if ((mem_start < reg_start) &&
 159             ((mem_start + mem_size) > reg_start)) {
 160                 /* Guarantee that the memory partition doesn't overlap the
 161                  * registers partition */
 162                 wl1251_debug(DEBUG_SPI, "End of partition[0] is "
 163                              "overlapping partition[1].  Adjusted.");
 164                 mem_size = reg_start - mem_start;
 165                 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
 166                              mem_start, mem_size);
 167                 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
 168                              reg_start, reg_size);
 169         } else if ((reg_start < mem_start) &&
 170                    ((reg_start + reg_size) > mem_start)) {
 171                 /* Guarantee that the register partition doesn't overlap the
 172                  * memory partition */
 173                 wl1251_debug(DEBUG_SPI, "End of partition[1] is"
 174                              " overlapping partition[0].  Adjusted.");
 175                 reg_size = mem_start - reg_start;
 176                 wl1251_debug(DEBUG_SPI, "mem_start %08X mem_size %08X",
 177                              mem_start, mem_size);
 178                 wl1251_debug(DEBUG_SPI, "reg_start %08X reg_size %08X",
 179                              reg_start, reg_size);
 180         }
 181
 182         partition[0].start = mem_start;
 183         partition[0].size  = mem_size;
 184         partition[1].start = reg_start;
 185         partition[1].size  = reg_size;
 186
 187         wl->physical_mem_addr = mem_start;
 188         wl->physical_reg_addr = reg_start;
 189
 190         wl->virtual_mem_addr = 0;
 191         wl->virtual_reg_addr = mem_size;
 192
 193         wl->if_ops->write(wl, HW_ACCESS_PART0_SIZE_ADDR, partition,
 194                 sizeof(partition));
 195 }