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
  13 int 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
  37 out:
  38         return ret;
  39 }
  40
  41 int 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 }