2 * Atheros AR9170 driver
4 * Basic HW register/memory/command access functions
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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.
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.
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/.
22 * This file incorporates work covered by the following copyright and
24 * Copyright (c) 2007-2008 Atheros Communications, Inc.
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.
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.
42 int ar9170_write_mem(struct ar9170 *ar, const __le32 *data, size_t len)
46 if (unlikely(!IS_ACCEPTING_CMD(ar)))
49 err = ar->exec_cmd(ar, AR9170_CMD_WMEM, len, (u8 *) data, 0, NULL);
51 printk(KERN_DEBUG "%s: writing memory failed\n",
52 wiphy_name(ar->hw->wiphy));
56 int ar9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val)
64 if (unlikely(!IS_ACCEPTING_CMD(ar)))
67 err = ar->exec_cmd(ar, AR9170_CMD_WREG, sizeof(buf),
70 printk(KERN_DEBUG "%s: writing reg %#x (val %#x) failed\n",
71 wiphy_name(ar->hw->wiphy), reg, val);
75 static int ar9170_read_mreg(struct ar9170 *ar, int nregs,
76 const u32 *regs, u32 *out)
81 if (unlikely(!IS_ACCEPTING_CMD(ar)))
84 /* abuse "out" for the register offsets, must be same length */
86 for (i = 0; i < nregs; i++)
87 offs[i] = cpu_to_le32(regs[i]);
89 /* also use the same buffer for the input */
92 err = ar->exec_cmd(ar, AR9170_CMD_RREG,
93 4 * nregs, (u8 *)offs,
94 4 * nregs, (u8 *)res);
98 /* convert result to cpu endian */
99 for (i = 0; i < nregs; i++)
100 out[i] = le32_to_cpu(res[i]);
105 int ar9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val)
107 return ar9170_read_mreg(ar, 1, ®, val);
110 int ar9170_echo_test(struct ar9170 *ar, u32 v)
112 __le32 echobuf = cpu_to_le32(v);
116 if (unlikely(!IS_ACCEPTING_CMD(ar)))
119 err = ar->exec_cmd(ar, AR9170_CMD_ECHO,
125 if (echobuf != echores)