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 	const 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 	const 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 }
108