cmd.c 4.79 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
/*
 * Atheros CARL9170 driver
 *
 * Basic HW register/memory/command access functions
 *
 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; see the file COPYING.  If not, see
 * http://www.gnu.org/licenses/.
 *
 * This file incorporates work covered by the following copyright and
 * permission notice:
 *    Copyright (c) 2007-2008 Atheros Communications, Inc.
 *
 *    Permission to use, copy, modify, and/or distribute this software for any
 *    purpose with or without fee is hereby granted, provided that the above
 *    copyright notice and this permission notice appear in all copies.
 *
 *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#include "carl9170.h"
#include "cmd.h"

int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val)
{
Joe Perches's avatar
Joe Perches committed
44
	const __le32 buf[2] = {
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
		cpu_to_le32(reg),
		cpu_to_le32(val),
	};
	int err;

	err = carl9170_exec_cmd(ar, CARL9170_CMD_WREG, sizeof(buf),
				(u8 *) buf, 0, NULL);
	if (err) {
		if (net_ratelimit()) {
			wiphy_err(ar->hw->wiphy, "writing reg %#x "
				"(val %#x) failed (%d)\n", reg, val, err);
		}
	}
	return err;
}

int carl9170_read_mreg(struct ar9170 *ar, const int nregs,
		       const u32 *regs, u32 *out)
{
	int i, err;
	__le32 *offs, *res;

	/* abuse "out" for the register offsets, must be same length */
	offs = (__le32 *)out;
	for (i = 0; i < nregs; i++)
		offs[i] = cpu_to_le32(regs[i]);

	/* also use the same buffer for the input */
	res = (__le32 *)out;

	err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
				4 * nregs, (u8 *)offs,
				4 * nregs, (u8 *)res);
	if (err) {
		if (net_ratelimit()) {
			wiphy_err(ar->hw->wiphy, "reading regs failed (%d)\n",
				  err);
		}
		return err;
	}

	/* convert result to cpu endian */
	for (i = 0; i < nregs; i++)
		out[i] = le32_to_cpu(res[i]);

	return 0;
}

int carl9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val)
{
	return carl9170_read_mreg(ar, 1, &reg, val);
}

int carl9170_echo_test(struct ar9170 *ar, const u32 v)
{
	u32 echores;
	int err;

	err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO,
				4, (u8 *)&v,
				4, (u8 *)&echores);
	if (err)
		return err;

	if (v != echores) {
		wiphy_info(ar->hw->wiphy, "wrong echo %x != %x", v, echores);
		return -EINVAL;
	}

	return 0;
}

struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar,
	const enum carl9170_cmd_oids cmd, const unsigned int len)
{
	struct carl9170_cmd *tmp;

	tmp = kzalloc(sizeof(struct carl9170_cmd_head) + len, GFP_ATOMIC);
	if (tmp) {
		tmp->hdr.cmd = cmd;
		tmp->hdr.len = len;
	}

	return tmp;
}

int carl9170_reboot(struct ar9170 *ar)
{
	struct carl9170_cmd *cmd;
	int err;

	cmd = carl9170_cmd_buf(ar, CARL9170_CMD_REBOOT_ASYNC, 0);
	if (!cmd)
		return -ENOMEM;

	err = __carl9170_exec_cmd(ar, (struct carl9170_cmd *)cmd, true);
	return err;
}

int carl9170_mac_reset(struct ar9170 *ar)
{
	return carl9170_exec_cmd(ar, CARL9170_CMD_SWRST,
				 0, NULL, 0, NULL);
}

int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
		       const u32 mode, const u32 addr, const u32 len)
{
	struct carl9170_cmd *cmd;

	cmd = carl9170_cmd_buf(ar, CARL9170_CMD_BCN_CTRL_ASYNC,
			       sizeof(struct carl9170_bcn_ctrl_cmd));
	if (!cmd)
		return -ENOMEM;

	cmd->bcn_ctrl.vif_id = cpu_to_le32(vif_id);
	cmd->bcn_ctrl.mode = cpu_to_le32(mode);
	cmd->bcn_ctrl.bcn_addr = cpu_to_le32(addr);
	cmd->bcn_ctrl.bcn_len = cpu_to_le32(len);

	return __carl9170_exec_cmd(ar, cmd, true);
}

int carl9170_powersave(struct ar9170 *ar, const bool ps)
{
	struct carl9170_cmd *cmd;
	u32 state;

	cmd = carl9170_cmd_buf(ar, CARL9170_CMD_PSM_ASYNC,
			       sizeof(struct carl9170_psm));
	if (!cmd)
		return -ENOMEM;

	if (ps) {
		/* Sleep until next TBTT */
		state = CARL9170_PSM_SLEEP | 1;
	} else {
		/* wake up immediately */
		state = 1;
	}

	cmd->psm.state = cpu_to_le32(state);
	return __carl9170_exec_cmd(ar, cmd, true);
}