drivers/net/wireless/realtek/rtw88/util.c

   1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
   2 /* Copyright(c) 2018-2019  Realtek Corporation
   3  */
   4
   5 #include "main.h"
   6 #include "util.h"
   7 #include "reg.h"
   8
   9 bool check_hw_ready(struct rtw_dev *rtwdev, u32 addr, u32 mask, u32 target)
  10 {
  11         u32 cnt;
  12
  13         for (cnt = 0; cnt < 1000; cnt++) {
  14                 if (rtw_read32_mask(rtwdev, addr, mask) == target)
  15                         return true;
  16
  17                 udelay(10);
  18         }
  19
  20         return false;
  21 }
  22 EXPORT_SYMBOL(check_hw_ready);
  23
  24 bool ltecoex_read_reg(struct rtw_dev *rtwdev, u16 offset, u32 *val)
  25 {
  26         struct rtw_chip_info *chip = rtwdev->chip;
  27         const struct rtw_ltecoex_addr *ltecoex = chip->ltecoex_addr;
  28
  29         if (!check_hw_ready(rtwdev, ltecoex->ctrl, LTECOEX_READY, 1))
  30                 return false;
  31
  32         rtw_write32(rtwdev, ltecoex->ctrl, 0x800F0000 | offset);
  33         *val = rtw_read32(rtwdev, ltecoex->rdata);
  34
  35         return true;
  36 }
  37
  38 bool ltecoex_reg_write(struct rtw_dev *rtwdev, u16 offset, u32 value)
  39 {
  40         struct rtw_chip_info *chip = rtwdev->chip;
  41         const struct rtw_ltecoex_addr *ltecoex = chip->ltecoex_addr;
  42
  43         if (!check_hw_ready(rtwdev, ltecoex->ctrl, LTECOEX_READY, 1))
  44                 return false;
  45
  46         rtw_write32(rtwdev, ltecoex->wdata, value);
  47         rtw_write32(rtwdev, ltecoex->ctrl, 0xC00F0000 | offset);
  48
  49         return true;
  50 }
  51
  52 void rtw_restore_reg(struct rtw_dev *rtwdev,
  53                      struct rtw_backup_info *bckp, u32 num)
  54 {
  55         u8 len;
  56         u32 reg;
  57         u32 val;
  58         int i;
  59
  60         for (i = 0; i < num; i++, bckp++) {
  61                 len = bckp->len;
  62                 reg = bckp->reg;
  63                 val = bckp->val;
  64
  65                 switch (len) {
  66                 case 1:
  67                         rtw_write8(rtwdev, reg, (u8)val);
  68                         break;
  69                 case 2:
  70                         rtw_write16(rtwdev, reg, (u16)val);
  71                         break;
  72                 case 4:
  73                         rtw_write32(rtwdev, reg, (u32)val);
  74                         break;
  75                 default:
  76                         break;
  77                 }
  78         }
  79 }
  80 EXPORT_SYMBOL(rtw_restore_reg);
  81
  82 void rtw_desc_to_mcsrate(u16 rate, u8 *mcs, u8 *nss)
  83 {
  84         if (rate <= DESC_RATE54M)
  85                 return;
  86
  87         if (rate >= DESC_RATEVHT1SS_MCS0 &&
  88             rate <= DESC_RATEVHT1SS_MCS9) {
  89                 *nss = 1;
  90                 *mcs = rate - DESC_RATEVHT1SS_MCS0;
  91         } else if (rate >= DESC_RATEVHT2SS_MCS0 &&
  92                    rate <= DESC_RATEVHT2SS_MCS9) {
  93                 *nss = 2;
  94                 *mcs = rate - DESC_RATEVHT2SS_MCS0;
  95         } else if (rate >= DESC_RATEVHT3SS_MCS0 &&
  96                    rate <= DESC_RATEVHT3SS_MCS9) {
  97                 *nss = 3;
  98                 *mcs = rate - DESC_RATEVHT3SS_MCS0;
  99         } else if (rate >= DESC_RATEVHT4SS_MCS0 &&
 100                    rate <= DESC_RATEVHT4SS_MCS9) {
 101                 *nss = 4;
 102                 *mcs = rate - DESC_RATEVHT4SS_MCS0;
 103         } else if (rate >= DESC_RATEMCS0 &&
 104                    rate <= DESC_RATEMCS15) {
 105                 *mcs = rate - DESC_RATEMCS0;
 106         }
 107 }