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1 | /* |
2 | * Atheros AR9170 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 | #ifndef __CMD_H | |
39 | #define __CMD_H | |
40 | ||
41 | #include "ar9170.h" | |
42 | ||
43 | /* basic HW access */ | |
44 | int ar9170_write_mem(struct ar9170 *ar, const __le32 *data, size_t len); | |
45 | int ar9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val); | |
46 | int ar9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val); | |
47 | int ar9170_echo_test(struct ar9170 *ar, u32 v); | |
48 | ||
49 | /* | |
50 | * Macros to facilitate writing multiple registers in a single | |
51 | * write-combining USB command. Note that when the first group | |
52 | * fails the whole thing will fail without any others attempted, | |
53 | * but you won't know which write in the group failed. | |
54 | */ | |
55 | #define ar9170_regwrite_begin(ar) \ | |
56 | do { \ | |
57 | int __nreg = 0, __err = 0; \ | |
58 | struct ar9170 *__ar = ar; | |
59 | ||
60 | #define ar9170_regwrite(r, v) do { \ | |
61 | __ar->cmdbuf[2 * __nreg + 1] = cpu_to_le32(r); \ | |
62 | __ar->cmdbuf[2 * __nreg + 2] = cpu_to_le32(v); \ | |
63 | __nreg++; \ | |
64 | if ((__nreg >= PAYLOAD_MAX/2)) { \ | |
65 | if (IS_ACCEPTING_CMD(__ar)) \ | |
66 | __err = ar->exec_cmd(__ar, AR9170_CMD_WREG, \ | |
67 | 8 * __nreg, \ | |
68 | (u8 *) &__ar->cmdbuf[1], \ | |
69 | 0, NULL); \ | |
70 | __nreg = 0; \ | |
71 | if (__err) \ | |
72 | goto __regwrite_out; \ | |
73 | } \ | |
74 | } while (0) | |
75 | ||
76 | #define ar9170_regwrite_finish() \ | |
77 | __regwrite_out : \ | |
78 | if (__nreg) { \ | |
79 | if (IS_ACCEPTING_CMD(__ar)) \ | |
80 | __err = ar->exec_cmd(__ar, AR9170_CMD_WREG, \ | |
81 | 8 * __nreg, \ | |
82 | (u8 *) &__ar->cmdbuf[1], \ | |
83 | 0, NULL); \ | |
84 | __nreg = 0; \ | |
85 | } | |
86 | ||
87 | #define ar9170_regwrite_result() \ | |
88 | __err; \ | |
89 | } while (0); | |
90 | ||
91 | #endif /* __CMD_H */ |