LXR linux/drivers/net/wireless/ti/wl18xx/io.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * This file is part of wl18xx
   4 *
   5 * Copyright (C) 2011 Texas Instruments
   6 */
   7
   8#include "../wlcore/wlcore.h"
   9#include "../wlcore/io.h"
  10
  11#include "io.h"
  12
  13int wl18xx_top_reg_write(struct wl1271 *wl, int addr, u16 val)
  14{
  15        u32 tmp;
  16        int ret;
  17
  18        if (WARN_ON(addr % 2))
  19                return -EINVAL;
  20
  21        if ((addr % 4) == 0) {
  22                ret = wlcore_read32(wl, addr, &tmp);
  23                if (ret < 0)
  24                        goto out;
  25
  26                tmp = (tmp & 0xffff0000) | val;
  27                ret = wlcore_write32(wl, addr, tmp);
  28        } else {
  29                ret = wlcore_read32(wl, addr - 2, &tmp);
  30                if (ret < 0)
  31                        goto out;
  32
  33                tmp = (tmp & 0xffff) | (val << 16);
  34                ret = wlcore_write32(wl, addr - 2, tmp);
  35        }
  36
  37out:
  38        return ret;
  39}
  40
  41int wl18xx_top_reg_read(struct wl1271 *wl, int addr, u16 *out)
  42{
  43        u32 val = 0;
  44        int ret;
  45
  46        if (WARN_ON(addr % 2))
  47                return -EINVAL;
  48
  49        if ((addr % 4) == 0) {
  50                /* address is 4-bytes aligned */
  51                ret = wlcore_read32(wl, addr, &val);
  52                if (ret >= 0 && out)
  53                        *out = val & 0xffff;
  54        } else {
  55                ret = wlcore_read32(wl, addr - 2, &val);
  56                if (ret >= 0 && out)
  57                        *out = (val & 0xffff0000) >> 16;
  58        }
  59
  60        return ret;
  61}
  62