/* * Atheros CARL9170 driver * * Basic HW register/memory/command access functions * * Copyright 2008, Johannes Berg * * 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 #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); }