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
  21 bool 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
  31 void wlcore_disable_interrupts(struct wl1271 *wl)
  32 {
  33         disable_irq(wl->irq);
  34 }
  35 EXPORT_SYMBOL_GPL(wlcore_disable_interrupts);
  36
  37 void wlcore_disable_interrupts_nosync(struct wl1271 *wl)
  38 {
  39         disable_irq_nosync(wl->irq);
  40 }
  41 EXPORT_SYMBOL_GPL(wlcore_disable_interrupts_nosync);
  42
  43 void wlcore_enable_interrupts(struct wl1271 *wl)
  44 {
  45         enable_irq(wl->irq);
  46 }
  47 EXPORT_SYMBOL_GPL(wlcore_enable_interrupts);
  48
  49 void wlcore_synchronize_interrupts(struct wl1271 *wl)
  50 {
  51         synchronize_irq(wl->irq);
  52 }
  53 EXPORT_SYMBOL_GPL(wlcore_synchronize_interrupts);
  54
  55 int 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 }
  87 EXPORT_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  */
 123 int 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
 183 out:
 184         return ret;
 185 }
 186 EXPORT_SYMBOL_GPL(wlcore_set_partition);
 187
 188 void wl1271_io_reset(struct wl1271 *wl)
 189 {
 190         if (wl->if_ops->reset)
 191                 wl->if_ops->reset(wl->dev);
 192 }
 193
 194 void wl1271_io_init(struct wl1271 *wl)
 195 {
 196         if (wl->if_ops->init)
 197                 wl->if_ops->init(wl->dev);
 198 }