130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
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* Atheros AR9170 driver
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*
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* Basic HW register/memory/command access functions
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*
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* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, see
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* http://www.gnu.org/licenses/.
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*
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* This file incorporates work covered by the following copyright and
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* permission notice:
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* Copyright (c) 2007-2008 Atheros Communications, Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "ar9170.h"
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#include "cmd.h"
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int ar9170_write_mem(struct ar9170 *ar, const __le32 *data, size_t len)
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{
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int err;
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if (unlikely(!IS_ACCEPTING_CMD(ar)))
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return 0;
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err = ar->exec_cmd(ar, AR9170_CMD_WMEM, len, (u8 *) data, 0, NULL);
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if (err)
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printk(KERN_DEBUG "%s: writing memory failed\n",
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wiphy_name(ar->hw->wiphy));
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return err;
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}
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int ar9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val)
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{
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__le32 buf[2] = {
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cpu_to_le32(reg),
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cpu_to_le32(val),
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};
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int err;
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if (unlikely(!IS_ACCEPTING_CMD(ar)))
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return 0;
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err = ar->exec_cmd(ar, AR9170_CMD_WREG, sizeof(buf),
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(u8 *) buf, 0, NULL);
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if (err)
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printk(KERN_DEBUG "%s: writing reg %#x (val %#x) failed\n",
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wiphy_name(ar->hw->wiphy), reg, val);
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return err;
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}
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static int ar9170_read_mreg(struct ar9170 *ar, int nregs,
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const u32 *regs, u32 *out)
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{
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int i, err;
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__le32 *offs, *res;
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if (unlikely(!IS_ACCEPTING_CMD(ar)))
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return 0;
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/* abuse "out" for the register offsets, must be same length */
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offs = (__le32 *)out;
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for (i = 0; i < nregs; i++)
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offs[i] = cpu_to_le32(regs[i]);
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/* also use the same buffer for the input */
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res = (__le32 *)out;
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err = ar->exec_cmd(ar, AR9170_CMD_RREG,
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4 * nregs, (u8 *)offs,
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4 * nregs, (u8 *)res);
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if (err)
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return err;
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/* convert result to cpu endian */
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for (i = 0; i < nregs; i++)
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out[i] = le32_to_cpu(res[i]);
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return 0;
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}
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int ar9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val)
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{
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return ar9170_read_mreg(ar, 1, ®, val);
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}
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int ar9170_echo_test(struct ar9170 *ar, u32 v)
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{
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__le32 echobuf = cpu_to_le32(v);
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__le32 echores;
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int err;
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if (unlikely(!IS_ACCEPTING_CMD(ar)))
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return -ENODEV;
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err = ar->exec_cmd(ar, AR9170_CMD_ECHO,
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4, (u8 *)&echobuf,
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4, (u8 *)&echores);
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if (err)
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return err;
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if (echobuf != echores)
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return -EINVAL;
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return 0;
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}
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