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222 lines
5.6 KiB
222 lines
5.6 KiB
/* |
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* Atheros CARL9170 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 <[email protected]> |
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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 <asm/div64.h> |
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#include "carl9170.h" |
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#include "cmd.h" |
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int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val) |
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{ |
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const __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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err = carl9170_exec_cmd(ar, CARL9170_CMD_WREG, sizeof(buf), |
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(u8 *) buf, 0, NULL); |
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if (err) { |
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if (net_ratelimit()) { |
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wiphy_err(ar->hw->wiphy, "writing reg %#x " |
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"(val %#x) failed (%d)\n", reg, val, err); |
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} |
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} |
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return err; |
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} |
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int carl9170_read_mreg(struct ar9170 *ar, const 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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/* 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 = carl9170_exec_cmd(ar, CARL9170_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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if (net_ratelimit()) { |
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wiphy_err(ar->hw->wiphy, "reading regs failed (%d)\n", |
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err); |
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} |
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return err; |
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} |
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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 carl9170_read_reg(struct ar9170 *ar, u32 reg, u32 *val) |
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{ |
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return carl9170_read_mreg(ar, 1, ®, val); |
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} |
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int carl9170_echo_test(struct ar9170 *ar, const u32 v) |
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{ |
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u32 echores; |
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int err; |
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err = carl9170_exec_cmd(ar, CARL9170_CMD_ECHO, |
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4, (u8 *)&v, |
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4, (u8 *)&echores); |
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if (err) |
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return err; |
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if (v != echores) { |
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wiphy_info(ar->hw->wiphy, "wrong echo %x != %x", v, echores); |
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return -EINVAL; |
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} |
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return 0; |
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} |
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struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar, |
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const enum carl9170_cmd_oids cmd, const unsigned int len) |
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{ |
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struct carl9170_cmd *tmp; |
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tmp = kzalloc(sizeof(struct carl9170_cmd_head) + len, GFP_ATOMIC); |
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if (tmp) { |
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tmp->hdr.cmd = cmd; |
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tmp->hdr.len = len; |
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} |
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return tmp; |
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} |
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int carl9170_reboot(struct ar9170 *ar) |
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{ |
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struct carl9170_cmd *cmd; |
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int err; |
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cmd = carl9170_cmd_buf(ar, CARL9170_CMD_REBOOT_ASYNC, 0); |
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if (!cmd) |
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return -ENOMEM; |
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err = __carl9170_exec_cmd(ar, cmd, true); |
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return err; |
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} |
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int carl9170_mac_reset(struct ar9170 *ar) |
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{ |
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return carl9170_exec_cmd(ar, CARL9170_CMD_SWRST, |
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0, NULL, 0, NULL); |
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} |
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int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id, |
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const u32 mode, const u32 addr, const u32 len) |
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{ |
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struct carl9170_cmd *cmd; |
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cmd = carl9170_cmd_buf(ar, CARL9170_CMD_BCN_CTRL_ASYNC, |
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sizeof(struct carl9170_bcn_ctrl_cmd)); |
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if (!cmd) |
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return -ENOMEM; |
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cmd->bcn_ctrl.vif_id = cpu_to_le32(vif_id); |
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cmd->bcn_ctrl.mode = cpu_to_le32(mode); |
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cmd->bcn_ctrl.bcn_addr = cpu_to_le32(addr); |
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cmd->bcn_ctrl.bcn_len = cpu_to_le32(len); |
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return __carl9170_exec_cmd(ar, cmd, true); |
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} |
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int carl9170_collect_tally(struct ar9170 *ar) |
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{ |
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struct carl9170_tally_rsp tally; |
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struct survey_info *info; |
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unsigned int tick; |
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int err; |
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err = carl9170_exec_cmd(ar, CARL9170_CMD_TALLY, 0, NULL, |
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sizeof(tally), (u8 *)&tally); |
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if (err) |
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return err; |
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tick = le32_to_cpu(tally.tick); |
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if (tick) { |
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ar->tally.active += le32_to_cpu(tally.active) / tick; |
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ar->tally.cca += le32_to_cpu(tally.cca) / tick; |
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ar->tally.tx_time += le32_to_cpu(tally.tx_time) / tick; |
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ar->tally.rx_total += le32_to_cpu(tally.rx_total); |
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ar->tally.rx_overrun += le32_to_cpu(tally.rx_overrun); |
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if (ar->channel) { |
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info = &ar->survey[ar->channel->hw_value]; |
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info->time = ar->tally.active; |
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info->time_busy = ar->tally.cca; |
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info->time_tx = ar->tally.tx_time; |
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do_div(info->time, 1000); |
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do_div(info->time_busy, 1000); |
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do_div(info->time_tx, 1000); |
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} |
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} |
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return 0; |
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} |
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int carl9170_powersave(struct ar9170 *ar, const bool ps) |
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{ |
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struct carl9170_cmd *cmd; |
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u32 state; |
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cmd = carl9170_cmd_buf(ar, CARL9170_CMD_PSM_ASYNC, |
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sizeof(struct carl9170_psm)); |
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if (!cmd) |
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return -ENOMEM; |
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if (ps) { |
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/* Sleep until next TBTT */ |
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state = CARL9170_PSM_SLEEP | 1; |
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} else { |
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/* wake up immediately */ |
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state = 1; |
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} |
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cmd->psm.state = cpu_to_le32(state); |
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return __carl9170_exec_cmd(ar, cmd, true); |
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}
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