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 
wl18xx_top_reg_write(struct wl1271 * wl,int addr,u16 val)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 
wl18xx_top_reg_read(struct wl1271 * wl,int addr,u16 * out)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 }
62