drivers/net/wireless/ti/wlcore/io.c

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 2008-2010 Nokia Corporation
   5  *
   6  * Contact: Luciano Coelho <luciano.coelho@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 <linux/module.h>
  25 #include <linux/platform_device.h>
  26 #include <linux/spi/spi.h>
  27 #include <linux/interrupt.h>
  28
  29 #include "wlcore.h"
  30 #include "debug.h"
  31 #include "wl12xx_80211.h"
  32 #include "io.h"
  33 #include "tx.h"
  34
  35 bool wl1271_set_block_size(struct wl1271 *wl)
  36 {
  37         if (wl->if_ops->set_block_size) {
  38                 wl->if_ops->set_block_size(wl->dev, WL12XX_BUS_BLOCK_SIZE);
  39                 return true;
  40         }
  41
  42         return false;
  43 }
  44
  45 void wlcore_disable_interrupts(struct wl1271 *wl)
  46 {
  47         disable_irq(wl->irq);
  48 }
  49 EXPORT_SYMBOL_GPL(wlcore_disable_interrupts);
  50
  51 void wlcore_enable_interrupts(struct wl1271 *wl)
  52 {
  53         enable_irq(wl->irq);
  54 }
  55 EXPORT_SYMBOL_GPL(wlcore_enable_interrupts);
  56
  57 int wlcore_translate_addr(struct wl1271 *wl, int addr)
  58 {
  59         struct wlcore_partition_set *part = &wl->curr_part;
  60
  61         /*
  62          * To translate, first check to which window of addresses the
  63          * particular address belongs. Then subtract the starting address
  64          * of that window from the address. Then, add offset of the
  65          * translated region.
  66          *
  67          * The translated regions occur next to each other in physical device
  68          * memory, so just add the sizes of the preceding address regions to
  69          * get the offset to the new region.
  70          */
  71         if ((addr >= part->mem.start) &&
  72             (addr < part->mem.start + part->mem.size))
  73                 return addr - part->mem.start;
  74         else if ((addr >= part->reg.start) &&
  75                  (addr < part->reg.start + part->reg.size))
  76                 return addr - part->reg.start + part->mem.size;
  77         else if ((addr >= part->mem2.start) &&
  78                  (addr < part->mem2.start + part->mem2.size))
  79                 return addr - part->mem2.start + part->mem.size +
  80                         part->reg.size;
  81         else if ((addr >= part->mem3.start) &&
  82                  (addr < part->mem3.start + part->mem3.size))
  83                 return addr - part->mem3.start + part->mem.size +
  84                         part->reg.size + part->mem2.size;
  85
  86         WARN(1, "HW address 0x%x out of range", addr);
  87         return 0;
  88 }
  89 EXPORT_SYMBOL_GPL(wlcore_translate_addr);
  90
  91 /* Set the partitions to access the chip addresses
  92  *
  93  * To simplify driver code, a fixed (virtual) memory map is defined for
  94  * register and memory addresses. Because in the chipset, in different stages
  95  * of operation, those addresses will move around, an address translation
  96  * mechanism is required.
  97  *
  98  * There are four partitions (three memory and one register partition),
  99  * which are mapped to two different areas of the hardware memory.
 100  *
 101  *                                Virtual address
 102  *                                     space
 103  *
 104  *                                    |    |
 105  *                                 ...+----+--> mem.start
 106  *          Physical address    ...   |    |
 107  *               space       ...      |    | [PART_0]
 108  *                        ...         |    |
 109  *  00000000  <--+----+...         ...+----+--> mem.start + mem.size
 110  *               |    |         ...   |    |
 111  *               |MEM |      ...      |    |
 112  *               |    |   ...         |    |
 113  *  mem.size  <--+----+...            |    | {unused area)
 114  *               |    |   ...         |    |
 115  *               |REG |      ...      |    |
 116  *  mem.size     |    |         ...   |    |
 117  *      +     <--+----+...         ...+----+--> reg.start
 118  *  reg.size     |    |   ...         |    |
 119  *               |MEM2|      ...      |    | [PART_1]
 120  *               |    |         ...   |    |
 121  *                                 ...+----+--> reg.start + reg.size
 122  *                                    |    |
 123  *
 124  */
 125 void wlcore_set_partition(struct wl1271 *wl,
 126                           const struct wlcore_partition_set *p)
 127 {
 128         /* copy partition info */
 129         memcpy(&wl->curr_part, p, sizeof(*p));
 130
 131         wl1271_debug(DEBUG_IO, "mem_start %08X mem_size %08X",
 132                      p->mem.start, p->mem.size);
 133         wl1271_debug(DEBUG_IO, "reg_start %08X reg_size %08X",
 134                      p->reg.start, p->reg.size);
 135         wl1271_debug(DEBUG_IO, "mem2_start %08X mem2_size %08X",
 136                      p->mem2.start, p->mem2.size);
 137         wl1271_debug(DEBUG_IO, "mem3_start %08X mem3_size %08X",
 138                      p->mem3.start, p->mem3.size);
 139
 140         wl1271_raw_write32(wl, HW_PART0_START_ADDR, p->mem.start);
 141         wl1271_raw_write32(wl, HW_PART0_SIZE_ADDR, p->mem.size);
 142         wl1271_raw_write32(wl, HW_PART1_START_ADDR, p->reg.start);
 143         wl1271_raw_write32(wl, HW_PART1_SIZE_ADDR, p->reg.size);
 144         wl1271_raw_write32(wl, HW_PART2_START_ADDR, p->mem2.start);
 145         wl1271_raw_write32(wl, HW_PART2_SIZE_ADDR, p->mem2.size);
 146         /*
 147          * We don't need the size of the last partition, as it is
 148          * automatically calculated based on the total memory size and
 149          * the sizes of the previous partitions.
 150          */
 151         wl1271_raw_write32(wl, HW_PART3_START_ADDR, p->mem3.start);
 152 }
 153 EXPORT_SYMBOL_GPL(wlcore_set_partition);
 154
 155 void wlcore_select_partition(struct wl1271 *wl, u8 part)
 156 {
 157         wl1271_debug(DEBUG_IO, "setting partition %d", part);
 158
 159         wlcore_set_partition(wl, &wl->ptable[part]);
 160 }
 161 EXPORT_SYMBOL_GPL(wlcore_select_partition);
 162
 163 void wl1271_io_reset(struct wl1271 *wl)
 164 {
 165         if (wl->if_ops->reset)
 166                 wl->if_ops->reset(wl->dev);
 167 }
 168
 169 void wl1271_io_init(struct wl1271 *wl)
 170 {
 171         if (wl->if_ops->init)
 172                 wl->if_ops->init(wl->dev);
 173 }