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

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * This file is part of wl1271
   4 *
   5 * Copyright (C) 2008-2010 Nokia Corporation
   6 *
   7 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   8 */
   9
  10#include <linux/module.h>
  11#include <linux/platform_device.h>
  12#include <linux/spi/spi.h>
  13#include <linux/interrupt.h>
  14
  15#include "wlcore.h"
  16#include "debug.h"
  17#include "wl12xx_80211.h"
  18#include "io.h"
  19#include "tx.h"
  20
  21bool wl1271_set_block_size(struct wl1271 *wl)
  22{
  23        if (wl->if_ops->set_block_size) {
  24                wl->if_ops->set_block_size(wl->dev, WL12XX_BUS_BLOCK_SIZE);
  25                return true;
  26        }
  27
  28        return false;
  29}
  30
  31void wlcore_disable_interrupts(struct wl1271 *wl)
  32{
  33        disable_irq(wl->irq);
  34}
  35EXPORT_SYMBOL_GPL(wlcore_disable_interrupts);
  36
  37void wlcore_disable_interrupts_nosync(struct wl1271 *wl)
  38{
  39        disable_irq_nosync(wl->irq);
  40}
  41EXPORT_SYMBOL_GPL(wlcore_disable_interrupts_nosync);
  42
  43void wlcore_enable_interrupts(struct wl1271 *wl)
  44{
  45        enable_irq(wl->irq);
  46}
  47EXPORT_SYMBOL_GPL(wlcore_enable_interrupts);
  48
  49void wlcore_synchronize_interrupts(struct wl1271 *wl)
  50{
  51        synchronize_irq(wl->irq);
  52}
  53EXPORT_SYMBOL_GPL(wlcore_synchronize_interrupts);
  54
  55int wlcore_translate_addr(struct wl1271 *wl, int addr)
  56{
  57        struct wlcore_partition_set *part = &wl->curr_part;
  58
  59        /*
  60         * To translate, first check to which window of addresses the
  61         * particular address belongs. Then subtract the starting address
  62         * of that window from the address. Then, add offset of the
  63         * translated region.
  64         *
  65         * The translated regions occur next to each other in physical device
  66         * memory, so just add the sizes of the preceding address regions to
  67         * get the offset to the new region.
  68         */
  69        if ((addr >= part->mem.start) &&
  70            (addr < part->mem.start + part->mem.size))
  71                return addr - part->mem.start;
  72        else if ((addr >= part->reg.start) &&
  73                 (addr < part->reg.start + part->reg.size))
  74                return addr - part->reg.start + part->mem.size;
  75        else if ((addr >= part->mem2.start) &&
  76                 (addr < part->mem2.start + part->mem2.size))
  77                return addr - part->mem2.start + part->mem.size +
  78                        part->reg.size;
  79        else if ((addr >= part->mem3.start) &&
  80                 (addr < part->mem3.start + part->mem3.size))
  81                return addr - part->mem3.start + part->mem.size +
  82                        part->reg.size + part->mem2.size;
  83
  84        WARN(1, "HW address 0x%x out of range", addr);
  85        return 0;
  86}
  87EXPORT_SYMBOL_GPL(wlcore_translate_addr);
  88
  89/* Set the partitions to access the chip addresses
  90 *
  91 * To simplify driver code, a fixed (virtual) memory map is defined for
  92 * register and memory addresses. Because in the chipset, in different stages
  93 * of operation, those addresses will move around, an address translation
  94 * mechanism is required.
  95 *
  96 * There are four partitions (three memory and one register partition),
  97 * which are mapped to two different areas of the hardware memory.
  98 *
  99 *                                Virtual address
 100 *                                     space
 101 *
 102 *                                    |    |
 103 *                                 ...+----+--> mem.start
 104 *          Physical address    ...   |    |
 105 *               space       ...      |    | [PART_0]
 106 *                        ...         |    |
 107 *  00000000  <--+----+...         ...+----+--> mem.start + mem.size
 108 *               |    |         ...   |    |
 109 *               |MEM |      ...      |    |
 110 *               |    |   ...         |    |
 111 *  mem.size  <--+----+...            |    | {unused area)
 112 *               |    |   ...         |    |
 113 *               |REG |      ...      |    |
 114 *  mem.size     |    |         ...   |    |
 115 *      +     <--+----+...         ...+----+--> reg.start
 116 *  reg.size     |    |   ...         |    |
 117 *               |MEM2|      ...      |    | [PART_1]
 118 *               |    |         ...   |    |
 119 *                                 ...+----+--> reg.start + reg.size
 120 *                                    |    |
 121 *
 122 */
 123int wlcore_set_partition(struct wl1271 *wl,
 124                         const struct wlcore_partition_set *p)
 125{
 126        int ret;
 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        ret = wlcore_raw_write32(wl, HW_PART0_START_ADDR, p->mem.start);
 141        if (ret < 0)
 142                goto out;
 143
 144        ret = wlcore_raw_write32(wl, HW_PART0_SIZE_ADDR, p->mem.size);
 145        if (ret < 0)
 146                goto out;
 147
 148        ret = wlcore_raw_write32(wl, HW_PART1_START_ADDR, p->reg.start);
 149        if (ret < 0)
 150                goto out;
 151
 152        ret = wlcore_raw_write32(wl, HW_PART1_SIZE_ADDR, p->reg.size);
 153        if (ret < 0)
 154                goto out;
 155
 156        ret = wlcore_raw_write32(wl, HW_PART2_START_ADDR, p->mem2.start);
 157        if (ret < 0)
 158                goto out;
 159
 160        ret = wlcore_raw_write32(wl, HW_PART2_SIZE_ADDR, p->mem2.size);
 161        if (ret < 0)
 162                goto out;
 163
 164        /* wl12xx only: We don't need the size of the last partition,
 165         * as it is automatically calculated based on the total memory
 166         * size and the sizes of the previous partitions.
 167         *
 168         * wl18xx re-defines the HW_PART3 addresses for logger over
 169         * SDIO support. wl12xx is expecting the write to
 170         * HW_PART3_START_ADDR at offset 24. This creates conflict
 171         * between the addresses.
 172         * In order to fix this the expected value is written to
 173         * HW_PART3_SIZE_ADDR instead which is at offset 24 after changes.
 174         */
 175        ret = wlcore_raw_write32(wl, HW_PART3_START_ADDR, p->mem3.start);
 176        if (ret < 0)
 177                goto out;
 178
 179        ret = wlcore_raw_write32(wl, HW_PART3_SIZE_ADDR, p->mem3.size);
 180        if (ret < 0)
 181                goto out;
 182
 183out:
 184        return ret;
 185}
 186EXPORT_SYMBOL_GPL(wlcore_set_partition);
 187
 188void wl1271_io_reset(struct wl1271 *wl)
 189{
 190        if (wl->if_ops->reset)
 191                wl->if_ops->reset(wl->dev);
 192}
 193
 194void wl1271_io_init(struct wl1271 *wl)
 195{
 196        if (wl->if_ops->init)
 197                wl->if_ops->init(wl->dev);
 198}
 199