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1 | /* |
2 | * Atheros CARL9170 driver | |
3 | * | |
4 | * Basic HW register/memory/command access functions | |
5 | * | |
6 | * Copyright 2008, Johannes Berg <johannes@sipsolutions.net> | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; see the file COPYING. If not, see | |
20 | * http://www.gnu.org/licenses/. | |
21 | * | |
22 | * This file incorporates work covered by the following copyright and | |
23 | * permission notice: | |
24 | * Copyright (c) 2007-2008 Atheros Communications, Inc. | |
25 | * | |
26 | * Permission to use, copy, modify, and/or distribute this software for any | |
27 | * purpose with or without fee is hereby granted, provided that the above | |
28 | * copyright notice and this permission notice appear in all copies. | |
29 | * | |
30 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
31 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
32 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
33 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
34 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
35 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
36 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
37 | */ | |
38 | ||
39 | #include "carl9170.h" | |
40 | #include "cmd.h" | |
41 | ||
42 | int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val) | |
43 | { | |
44 | __le32 buf[2] = { | |
45 | cpu_to_le32(reg), | |
46 | cpu_to_le32(val), | |
47 | }; | |
48 | int err; | |
49 | ||
50 | err = carl9170_exec_cmd(ar, CARL9170_CMD_WREG, sizeof(buf), | |
51 | (u8 *) buf, 0, NULL); | |
52 | if (err) { | |
53 | if (net_ratelimit()) { | |
54 | wiphy_err(ar->hw->wiphy, "writing reg %#x " | |
55 | "(val %#x) failed (%d)\n", reg, val, err); | |
56 | } | |
57 | } | |
58 | return err; | |
59 | } | |
60 | ||
61 | int carl9170_read_mreg(struct ar9170 *ar, const int nregs, | |
62 | const u32 *regs, u32 *out) | |
63 | { | |
64 | int i, err; | |
65 | __le32 *offs, *res; | |
66 | ||
67 | /* abuse "out" for the register offsets, must be same length */ | |
68 | offs = (__le32 *)out; | |
69 | for (i = 0; i < nregs; i++) | |
70 | offs[i] = cpu_to_le32(regs[i]); | |
71 | ||
72 | /* also use the same buffer for the input */ | |
73 | res = (__le32 *)out; | |
74 | ||
75 | err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, | |
76 | 4 * nregs, (u8 *)offs, | |
77 | 4 * nregs, (u8 *)res); | |
78 | if (err) { | |
79 | if (net_ratelimit()) { | |
80 | wiphy_err(ar->hw->wiphy, "reading regs failed (%d)\n", | |
81 | err); | |
82 | } | |
83 | return err; | |
84 | } | |
85 | ||
86 | /* convert result to cpu endian */ | |
87 | for (i = 0; i < nregs; i++) | |
88 | out[i] = le32_to_cpu(res[i]); | |
89 | ||
90 | return 0; | |
91 | } | |
92 | ||
93 | int carl9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val) | |
94 | { | |
95 | return carl9170_read_mreg(ar, 1, ®, val); | |
96 | } | |
97 | ||
98 | int carl9170_echo_test(struct ar9170 *ar, const u32 v) | |
99 | { | |
100 | u32 echores; | |
101 | int err; | |
102 | ||
103 | err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO, | |
104 | 4, (u8 *)&v, | |
105 | 4, (u8 *)&echores); | |
106 | if (err) | |
107 | return err; | |
108 | ||
109 | if (v != echores) { | |
110 | wiphy_info(ar->hw->wiphy, "wrong echo %x != %x", v, echores); | |
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | return 0; | |
115 | } | |
116 | ||
117 | struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar, | |
118 | const enum carl9170_cmd_oids cmd, const unsigned int len) | |
119 | { | |
120 | struct carl9170_cmd *tmp; | |
121 | ||
122 | tmp = kzalloc(sizeof(struct carl9170_cmd_head) + len, GFP_ATOMIC); | |
123 | if (tmp) { | |
124 | tmp->hdr.cmd = cmd; | |
125 | tmp->hdr.len = len; | |
126 | } | |
127 | ||
128 | return tmp; | |
129 | } | |
130 | ||
131 | int carl9170_reboot(struct ar9170 *ar) | |
132 | { | |
133 | struct carl9170_cmd *cmd; | |
134 | int err; | |
135 | ||
136 | cmd = carl9170_cmd_buf(ar, CARL9170_CMD_REBOOT_ASYNC, 0); | |
137 | if (!cmd) | |
138 | return -ENOMEM; | |
139 | ||
140 | err = __carl9170_exec_cmd(ar, (struct carl9170_cmd *)cmd, true); | |
141 | return err; | |
142 | } | |
143 | ||
144 | int carl9170_mac_reset(struct ar9170 *ar) | |
145 | { | |
146 | return carl9170_exec_cmd(ar, CARL9170_CMD_SWRST, | |
147 | 0, NULL, 0, NULL); | |
148 | } | |
149 | ||
150 | int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id, | |
151 | const u32 mode, const u32 addr, const u32 len) | |
152 | { | |
153 | struct carl9170_cmd *cmd; | |
154 | ||
155 | cmd = carl9170_cmd_buf(ar, CARL9170_CMD_BCN_CTRL_ASYNC, | |
156 | sizeof(struct carl9170_bcn_ctrl_cmd)); | |
157 | if (!cmd) | |
158 | return -ENOMEM; | |
159 | ||
160 | cmd->bcn_ctrl.vif_id = cpu_to_le32(vif_id); | |
161 | cmd->bcn_ctrl.mode = cpu_to_le32(mode); | |
162 | cmd->bcn_ctrl.bcn_addr = cpu_to_le32(addr); | |
163 | cmd->bcn_ctrl.bcn_len = cpu_to_le32(len); | |
164 | ||
165 | return __carl9170_exec_cmd(ar, cmd, true); | |
166 | } | |
167 | ||
168 | int carl9170_powersave(struct ar9170 *ar, const bool ps) | |
169 | { | |
170 | struct carl9170_cmd *cmd; | |
171 | u32 state; | |
172 | ||
173 | cmd = carl9170_cmd_buf(ar, CARL9170_CMD_PSM_ASYNC, | |
174 | sizeof(struct carl9170_psm)); | |
175 | if (!cmd) | |
176 | return -ENOMEM; | |
177 | ||
178 | if (ps) { | |
179 | /* Sleep until next TBTT */ | |
180 | state = CARL9170_PSM_SLEEP | 1; | |
181 | } else { | |
182 | /* wake up immediately */ | |
183 | state = 1; | |
184 | } | |
185 | ||
186 | cmd->psm.state = cpu_to_le32(state); | |
187 | return __carl9170_exec_cmd(ar, cmd, true); | |
188 | } |