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/drivers/net/wireless/ath/carl9170/cmd.h

http://github.com/mirrors/linux
C Header | 174 lines | 111 code | 18 blank | 45 comment | 29 complexity | 866a770ce7a0dce29d38d0981fd58044 MD5 | raw file
  1/*
  2 * Atheros CARL9170 driver
  3 *
  4 * Basic HW register/memory/command access functions
  5 *
  6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
  7 * Copyright 2010, Christian Lamparter <chunkeey@googlemail.com>
  8 *
  9 * This program is free software; you can redistribute it and/or modify
 10 * it under the terms of the GNU General Public License as published by
 11 * the Free Software Foundation; either version 2 of the License, or
 12 * (at your option) any later version.
 13 *
 14 * This program is distributed in the hope that it will be useful,
 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17 * GNU General Public License for more details.
 18 *
 19 * You should have received a copy of the GNU General Public License
 20 * along with this program; see the file COPYING.  If not, see
 21 * http://www.gnu.org/licenses/.
 22 *
 23 * This file incorporates work covered by the following copyright and
 24 * permission notice:
 25 *    Copyright (c) 2007-2008 Atheros Communications, Inc.
 26 *
 27 *    Permission to use, copy, modify, and/or distribute this software for any
 28 *    purpose with or without fee is hereby granted, provided that the above
 29 *    copyright notice and this permission notice appear in all copies.
 30 *
 31 *    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 32 *    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 33 *    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 34 *    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 35 *    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 36 *    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 37 *    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 38 */
 39#ifndef __CMD_H
 40#define __CMD_H
 41
 42#include "carl9170.h"
 43
 44/* basic HW access */
 45int carl9170_write_reg(struct ar9170 *ar, const u32 reg, const u32 val);
 46int carl9170_read_reg(struct ar9170 *ar, const u32 reg, u32 *val);
 47int carl9170_read_mreg(struct ar9170 *ar, const int nregs,
 48		       const u32 *regs, u32 *out);
 49int carl9170_echo_test(struct ar9170 *ar, u32 v);
 50int carl9170_reboot(struct ar9170 *ar);
 51int carl9170_mac_reset(struct ar9170 *ar);
 52int carl9170_powersave(struct ar9170 *ar, const bool power_on);
 53int carl9170_collect_tally(struct ar9170 *ar);
 54int carl9170_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
 55		       const u32 mode, const u32 addr, const u32 len);
 56
 57static inline int carl9170_flush_cab(struct ar9170 *ar,
 58				     const unsigned int vif_id)
 59{
 60	return carl9170_bcn_ctrl(ar, vif_id, CARL9170_BCN_CTRL_DRAIN, 0, 0);
 61}
 62
 63static inline int carl9170_rx_filter(struct ar9170 *ar,
 64				     const unsigned int _rx_filter)
 65{
 66	__le32 rx_filter = cpu_to_le32(_rx_filter);
 67
 68	return carl9170_exec_cmd(ar, CARL9170_CMD_RX_FILTER,
 69				sizeof(rx_filter), (u8 *)&rx_filter,
 70				0, NULL);
 71}
 72
 73struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar,
 74	const enum carl9170_cmd_oids cmd, const unsigned int len);
 75
 76/*
 77 * Macros to facilitate writing multiple registers in a single
 78 * write-combining USB command. Note that when the first group
 79 * fails the whole thing will fail without any others attempted,
 80 * but you won't know which write in the group failed.
 81 */
 82#define carl9170_regwrite_begin(ar)					\
 83do {									\
 84	int __nreg = 0, __err = 0;					\
 85	struct ar9170 *__ar = ar;
 86
 87#define carl9170_regwrite(r, v) do {					\
 88	__ar->cmd_buf[2 * __nreg + 1] = cpu_to_le32(r);			\
 89	__ar->cmd_buf[2 * __nreg + 2] = cpu_to_le32(v);			\
 90	__nreg++;							\
 91	if ((__nreg >= PAYLOAD_MAX / 2)) {				\
 92		if (IS_ACCEPTING_CMD(__ar))				\
 93			__err = carl9170_exec_cmd(__ar,			\
 94				CARL9170_CMD_WREG, 8 * __nreg,		\
 95				(u8 *) &__ar->cmd_buf[1], 0, NULL);	\
 96		else							\
 97			goto __regwrite_out;				\
 98									\
 99		__nreg = 0;						\
100		if (__err)						\
101			goto __regwrite_out;				\
102	}								\
103} while (0)
104
105#define carl9170_regwrite_finish()					\
106__regwrite_out :							\
107	if (__err == 0 && __nreg) {					\
108		if (IS_ACCEPTING_CMD(__ar))				\
109			__err = carl9170_exec_cmd(__ar,			\
110				CARL9170_CMD_WREG, 8 * __nreg,		\
111				(u8 *) &__ar->cmd_buf[1], 0, NULL);	\
112		__nreg = 0;						\
113	}
114
115#define carl9170_regwrite_result()					\
116	__err;								\
117} while (0)
118
119
120#define carl9170_async_regwrite_get_buf()				\
121do {									\
122	__nreg = 0;							\
123	__cmd = carl9170_cmd_buf(__carl, CARL9170_CMD_WREG_ASYNC,	\
124				 CARL9170_MAX_CMD_PAYLOAD_LEN);		\
125	if (__cmd == NULL) {						\
126		__err = -ENOMEM;					\
127		goto __async_regwrite_out;				\
128	}								\
129} while (0)
130
131#define carl9170_async_regwrite_begin(carl)				\
132do {									\
133	struct ar9170 *__carl = carl;					\
134	struct carl9170_cmd *__cmd;					\
135	unsigned int __nreg;						\
136	int  __err = 0;							\
137	carl9170_async_regwrite_get_buf();				\
138
139#define carl9170_async_regwrite_flush()					\
140do {									\
141	if (__cmd == NULL || __nreg == 0)				\
142		break;							\
143									\
144	if (IS_ACCEPTING_CMD(__carl) && __nreg) {			\
145		__cmd->hdr.len = 8 * __nreg;				\
146		__err = __carl9170_exec_cmd(__carl, __cmd, true);	\
147		__cmd = NULL;						\
148		break;							\
149	}								\
150	goto __async_regwrite_out;					\
151} while (0)
152
153#define carl9170_async_regwrite(r, v) do {				\
154	if (__cmd == NULL)						\
155		carl9170_async_regwrite_get_buf();			\
156	__cmd->wreg.regs[__nreg].addr = cpu_to_le32(r);			\
157	__cmd->wreg.regs[__nreg].val = cpu_to_le32(v);			\
158	__nreg++;							\
159	if ((__nreg >= PAYLOAD_MAX / 2))				\
160		carl9170_async_regwrite_flush();			\
161} while (0)
162
163#define carl9170_async_regwrite_finish() do {				\
164__async_regwrite_out:							\
165	if (__cmd != NULL && __err == 0)				\
166		carl9170_async_regwrite_flush();			\
167	kfree(__cmd);							\
168} while (0)								\
169
170#define carl9170_async_regwrite_result()				\
171	__err;								\
172} while (0)
173
174#endif /* __CMD_H */