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 <asm/div64.h> |
40 | #include "carl9170.h" |
41 | #include "cmd.h" |
42 | |
43 | int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val) |
44 | { |
45 | const __le32 buf[2] = { |
46 | cpu_to_le32(reg), |
47 | cpu_to_le32(val), |
48 | }; |
49 | int err; |
50 | |
51 | err = carl9170_exec_cmd(ar, CARL9170_CMD_WREG, plen: sizeof(buf), |
52 | payload: (u8 *) buf, rlen: 0, NULL); |
53 | if (err) { |
54 | if (net_ratelimit()) { |
55 | wiphy_err(ar->hw->wiphy, "writing reg %#x " |
56 | "(val %#x) failed (%d)\n" , reg, val, err); |
57 | } |
58 | } |
59 | return err; |
60 | } |
61 | |
62 | int carl9170_read_mreg(struct ar9170 *ar, const int nregs, |
63 | const u32 *regs, u32 *out) |
64 | { |
65 | int i, err; |
66 | __le32 *offs, *res; |
67 | |
68 | /* abuse "out" for the register offsets, must be same length */ |
69 | offs = (__le32 *)out; |
70 | for (i = 0; i < nregs; i++) |
71 | offs[i] = cpu_to_le32(regs[i]); |
72 | |
73 | /* also use the same buffer for the input */ |
74 | res = (__le32 *)out; |
75 | |
76 | err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG, |
77 | plen: 4 * nregs, payload: (u8 *)offs, |
78 | rlen: 4 * nregs, resp: (u8 *)res); |
79 | if (err) { |
80 | if (net_ratelimit()) { |
81 | wiphy_err(ar->hw->wiphy, "reading regs failed (%d)\n" , |
82 | err); |
83 | } |
84 | return err; |
85 | } |
86 | |
87 | /* convert result to cpu endian */ |
88 | for (i = 0; i < nregs; i++) |
89 | out[i] = le32_to_cpu(res[i]); |
90 | |
91 | return 0; |
92 | } |
93 | |
94 | int carl9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val) |
95 | { |
96 | return carl9170_read_mreg(ar, nregs: 1, regs: ®, out: val); |
97 | } |
98 | |
99 | int carl9170_echo_test(struct ar9170 *ar, const u32 v) |
100 | { |
101 | u32 echores; |
102 | int err; |
103 | |
104 | err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO, |
105 | plen: 4, payload: (u8 *)&v, |
106 | rlen: 4, resp: (u8 *)&echores); |
107 | if (err) |
108 | return err; |
109 | |
110 | if (v != echores) { |
111 | wiphy_info(ar->hw->wiphy, "wrong echo %x != %x" , v, echores); |
112 | return -EINVAL; |
113 | } |
114 | |
115 | return 0; |
116 | } |
117 | |
118 | struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar, |
119 | const enum carl9170_cmd_oids cmd, const unsigned int len) |
120 | { |
121 | struct carl9170_cmd *tmp; |
122 | |
123 | tmp = kzalloc(size: sizeof(*tmp), GFP_ATOMIC); |
124 | if (tmp) { |
125 | tmp->hdr.cmd = cmd; |
126 | tmp->hdr.len = len; |
127 | } |
128 | |
129 | return tmp; |
130 | } |
131 | |
132 | int carl9170_reboot(struct ar9170 *ar) |
133 | { |
134 | struct carl9170_cmd *cmd; |
135 | int err; |
136 | |
137 | cmd = carl9170_cmd_buf(ar, cmd: CARL9170_CMD_REBOOT_ASYNC, len: 0); |
138 | if (!cmd) |
139 | return -ENOMEM; |
140 | |
141 | err = __carl9170_exec_cmd(ar, cmd, free_buf: true); |
142 | return err; |
143 | } |
144 | |
145 | int carl9170_mac_reset(struct ar9170 *ar) |
146 | { |
147 | return carl9170_exec_cmd(ar, CARL9170_CMD_SWRST, |
148 | plen: 0, NULL, rlen: 0, NULL); |
149 | } |
150 | |
151 | int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id, |
152 | const u32 mode, const u32 addr, const u32 len) |
153 | { |
154 | struct carl9170_cmd *cmd; |
155 | |
156 | cmd = carl9170_cmd_buf(ar, cmd: CARL9170_CMD_BCN_CTRL_ASYNC, |
157 | len: sizeof(struct carl9170_bcn_ctrl_cmd)); |
158 | if (!cmd) |
159 | return -ENOMEM; |
160 | |
161 | cmd->bcn_ctrl.vif_id = cpu_to_le32(vif_id); |
162 | cmd->bcn_ctrl.mode = cpu_to_le32(mode); |
163 | cmd->bcn_ctrl.bcn_addr = cpu_to_le32(addr); |
164 | cmd->bcn_ctrl.bcn_len = cpu_to_le32(len); |
165 | |
166 | return __carl9170_exec_cmd(ar, cmd, free_buf: true); |
167 | } |
168 | |
169 | int carl9170_collect_tally(struct ar9170 *ar) |
170 | { |
171 | struct carl9170_tally_rsp tally; |
172 | struct survey_info *info; |
173 | unsigned int tick; |
174 | int err; |
175 | |
176 | err = carl9170_exec_cmd(ar, CARL9170_CMD_TALLY, plen: 0, NULL, |
177 | rlen: sizeof(tally), resp: (u8 *)&tally); |
178 | if (err) |
179 | return err; |
180 | |
181 | tick = le32_to_cpu(tally.tick); |
182 | if (tick) { |
183 | ar->tally.active += le32_to_cpu(tally.active) / tick; |
184 | ar->tally.cca += le32_to_cpu(tally.cca) / tick; |
185 | ar->tally.tx_time += le32_to_cpu(tally.tx_time) / tick; |
186 | ar->tally.rx_total += le32_to_cpu(tally.rx_total); |
187 | ar->tally.rx_overrun += le32_to_cpu(tally.rx_overrun); |
188 | |
189 | if (ar->channel) { |
190 | info = &ar->survey[ar->channel->hw_value]; |
191 | info->time = ar->tally.active; |
192 | info->time_busy = ar->tally.cca; |
193 | info->time_tx = ar->tally.tx_time; |
194 | do_div(info->time, 1000); |
195 | do_div(info->time_busy, 1000); |
196 | do_div(info->time_tx, 1000); |
197 | } |
198 | } |
199 | return 0; |
200 | } |
201 | |
202 | int carl9170_powersave(struct ar9170 *ar, const bool ps) |
203 | { |
204 | struct carl9170_cmd *cmd; |
205 | u32 state; |
206 | |
207 | cmd = carl9170_cmd_buf(ar, cmd: CARL9170_CMD_PSM_ASYNC, |
208 | len: sizeof(struct carl9170_psm)); |
209 | if (!cmd) |
210 | return -ENOMEM; |
211 | |
212 | if (ps) { |
213 | /* Sleep until next TBTT */ |
214 | state = CARL9170_PSM_SLEEP | 1; |
215 | } else { |
216 | /* wake up immediately */ |
217 | state = 1; |
218 | } |
219 | |
220 | cmd->psm.state = cpu_to_le32(state); |
221 | return __carl9170_exec_cmd(ar, cmd, free_buf: true); |
222 | } |
223 | |