/*
* Atheros CARL9170 driver
*
* Basic HW register/memory/command access functions
*
* Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, see
* http://www.gnu.org/licenses/.
*
* This file incorporates work covered by the following copyright and
* permission notice:
* Copyright (c) 2007-2008 Atheros Communications, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <asm/div64.h>
#include "carl9170.h"
#include "cmd.h"
int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val)
{
const __le32 buf[2] = {
cpu_to_le32(reg),
cpu_to_le32(val),
};
int err;
err = carl9170_exec_cmd(ar, CARL9170_CMD_WREG, sizeof(buf),
(u8 *) buf, 0, NULL);
if (err) {
if (net_ratelimit()) {
wiphy_err(ar->hw->wiphy, "writing reg %#x "
"(val %#x) failed (%d)\n", reg, val, err);
}
}
return err;
}
int carl9170_read_mreg(struct ar9170 *ar, const int nregs,
const u32 *regs, u32 *out)
{
int i, err;
__le32 *offs, *res;
/* abuse "out" for the register offsets, must be same length */
offs = (__le32 *)out;
for (i = 0; i < nregs; i++)
offs[i] = cpu_to_le32(regs[i]);
/* also use the same buffer for the input */
res = (__le32 *)out;
err = carl9170_exec_cmd(ar, CARL9170_CMD_RREG,
4 * nregs, (u8 *)offs,
4 * nregs, (u8 *)res);
if (err) {
if (net_ratelimit()) {
wiphy_err(ar->hw->wiphy, "reading regs failed (%d)\n",
err);
}
return err;
}
/* convert result to cpu endian */
for (i = 0; i < nregs; i++)
out[i] = le32_to_cpu(res[i]);
return 0;
}
int carl9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val)
{
return carl9170_read_mreg(ar, 1, ®, val);
}
int carl9170_echo_test(struct ar9170 *ar, const u32 v)
{
u32 echores;
int err;
err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO,
4, (u8 *)&v,
4, (u8 *)&echores);
if (err)
return err;
if (v != echores) {
wiphy_info(ar->hw->wiphy, "wrong echo %x != %x", v, echores);
return -EINVAL;
}
return 0;
}
struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar,
const enum carl9170_cmd_oids cmd, const unsigned int len)
{
struct carl9170_cmd *tmp;
tmp = kzalloc(sizeof(struct carl9170_cmd_head) + len, GFP_ATOMIC);
if (tmp) {
tmp->hdr.cmd = cmd;
tmp->hdr.len = len;
}
return tmp;
}
int carl9170_reboot(struct ar9170 *ar)
{
struct carl9170_cmd *cmd;
int err;
cmd = carl9170_cmd_buf(ar, CARL9170_CMD_REBOOT_ASYNC, 0);
if (!cmd)
return -ENOMEM;
err = __carl9170_exec_cmd(ar, (struct carl9170_cmd *)cmd, true);
return err;
}
int carl9170_mac_reset(struct ar9170 *ar)
{
return carl9170_exec_cmd(ar, CARL9170_CMD_SWRST,
0, NULL, 0, NULL);
}
int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
const u32 mode, const u32 addr, const u32 len)
{
struct carl9170_cmd *cmd;
cmd = carl9170_cmd_buf(ar, CARL9170_CMD_BCN_CTRL_ASYNC,
sizeof(struct carl9170_bcn_ctrl_cmd));
if (!cmd)
return -ENOMEM;
cmd->bcn_ctrl.vif_id = cpu_to_le32(vif_id);
cmd->bcn_ctrl.mode = cpu_to_le32(mode);
cmd->bcn_ctrl.bcn_addr = cpu_to_le32(addr);
cmd->bcn_ctrl.bcn_len = cpu_to_le32(len);
return __carl9170_exec_cmd(ar, cmd, true);
}
int carl9170_collect_tally(struct ar9170 *ar)
{
struct carl9170_tally_rsp tally;
struct survey_info *info;
unsigned int tick;
int err;
err = carl9170_exec_cmd(ar, CARL9170_CMD_TALLY, 0, NULL,
sizeof(tally), (u8 *)&tally);
if (err)
return err;
tick = le32_to_cpu(tally.tick);
if (tick) {
ar->tally.active += le32_to_cpu(tally.active) / tick;
ar->tally.cca += le32_to_cpu(tally.cca) / tick;
ar->tally.tx_time += le32_to_cpu(tally.tx_time) / tick;
ar->tally.rx_total += le32_to_cpu(tally.rx_total);
ar->tally.rx_overrun += le32_to_cpu(tally.rx_overrun);
if (ar->channel) {
info = &ar->survey[ar->channel->hw_value];
info->channel_time = ar->tally.active;
info->channel_time_busy = ar->tally.cca;
info->channel_time_tx = ar->tally.tx_time;
do_div(info->channel_time, 1000);
do_div(info->channel_time_busy, 1000);
do_div(info->channel_time_tx, 1000);
}
}
return 0;
}
int carl9170_powersave(struct ar9170 *ar, const bool ps)
{
struct carl9170_cmd *cmd;
u32 state;
cmd = carl9170_cmd_buf(ar, CARL9170_CMD_PSM_ASYNC,
sizeof(struct carl9170_psm));
if (!cmd)
return -ENOMEM;
if (ps) {
/* Sleep until next TBTT */
state = CARL9170_PSM_SLEEP | 1;
} else {
/* wake up immediately */
state = 1;
}
cmd->psm.state = cpu_to_le32(state);
return __carl9170_exec_cmd(ar, cmd, true);
}