| Christian Lamparter | e9348cd | 2009-03-21 23:05:13 +0100 | [diff] [blame] | 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 | |
| 39 | #include "ar9170.h" |
| 40 | #include "cmd.h" |
| 41 | |
| 42 | int ar9170_write_mem(struct ar9170 *ar, const __le32 *data, size_t len) |
| 43 | { |
| 44 | int err; |
| 45 | |
| 46 | if (unlikely(!IS_ACCEPTING_CMD(ar))) |
| 47 | return 0; |
| 48 | |
| 49 | err = ar->exec_cmd(ar, AR9170_CMD_WMEM, len, (u8 *) data, 0, NULL); |
| 50 | if (err) |
| 51 | printk(KERN_DEBUG "%s: writing memory failed\n", |
| 52 | wiphy_name(ar->hw->wiphy)); |
| 53 | return err; |
| 54 | } |
| 55 | |
| 56 | int ar9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val) |
| 57 | { |
| 58 | __le32 buf[2] = { |
| 59 | cpu_to_le32(reg), |
| 60 | cpu_to_le32(val), |
| 61 | }; |
| 62 | int err; |
| 63 | |
| 64 | if (unlikely(!IS_ACCEPTING_CMD(ar))) |
| 65 | return 0; |
| 66 | |
| 67 | err = ar->exec_cmd(ar, AR9170_CMD_WREG, sizeof(buf), |
| 68 | (u8 *) buf, 0, NULL); |
| 69 | if (err) |
| 70 | printk(KERN_DEBUG "%s: writing reg %#x (val %#x) failed\n", |
| 71 | wiphy_name(ar->hw->wiphy), reg, val); |
| 72 | return err; |
| 73 | } |
| 74 | |
| 75 | static int ar9170_read_mreg(struct ar9170 *ar, int nregs, |
| 76 | const u32 *regs, u32 *out) |
| 77 | { |
| 78 | int i, err; |
| 79 | __le32 *offs, *res; |
| 80 | |
| 81 | if (unlikely(!IS_ACCEPTING_CMD(ar))) |
| 82 | return 0; |
| 83 | |
| 84 | /* abuse "out" for the register offsets, must be same length */ |
| 85 | offs = (__le32 *)out; |
| 86 | for (i = 0; i < nregs; i++) |
| 87 | offs[i] = cpu_to_le32(regs[i]); |
| 88 | |
| 89 | /* also use the same buffer for the input */ |
| 90 | res = (__le32 *)out; |
| 91 | |
| 92 | err = ar->exec_cmd(ar, AR9170_CMD_RREG, |
| 93 | 4 * nregs, (u8 *)offs, |
| 94 | 4 * nregs, (u8 *)res); |
| 95 | if (err) |
| 96 | return err; |
| 97 | |
| 98 | /* convert result to cpu endian */ |
| 99 | for (i = 0; i < nregs; i++) |
| 100 | out[i] = le32_to_cpu(res[i]); |
| 101 | |
| 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | int ar9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val) |
| 106 | { |
| 107 | return ar9170_read_mreg(ar, 1, ®, val); |
| 108 | } |
| 109 | |
| 110 | int ar9170_echo_test(struct ar9170 *ar, u32 v) |
| 111 | { |
| 112 | __le32 echobuf = cpu_to_le32(v); |
| 113 | __le32 echores; |
| 114 | int err; |
| 115 | |
| 116 | if (unlikely(!IS_ACCEPTING_CMD(ar))) |
| 117 | return -ENODEV; |
| 118 | |
| 119 | err = ar->exec_cmd(ar, AR9170_CMD_ECHO, |
| 120 | 4, (u8 *)&echobuf, |
| 121 | 4, (u8 *)&echores); |
| 122 | if (err) |
| 123 | return err; |
| 124 | |
| 125 | if (echobuf != echores) |
| 126 | return -EINVAL; |
| 127 | |
| 128 | return 0; |
| 129 | } |