PageRenderTime 21ms CodeModel.GetById 17ms app.highlight 3ms RepoModel.GetById 0ms app.codeStats 0ms

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

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 173 lines | 110 code | 18 blank | 45 comment | 29 complexity | 8179567d4d78668e2ed0e053c3f479e9 MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
  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_bcn_ctrl(struct ar9170 *ar, const unsigned int vif_id,
 54		       const u32 mode, const u32 addr, const u32 len);
 55
 56static inline int carl9170_flush_cab(struct ar9170 *ar,
 57				     const unsigned int vif_id)
 58{
 59	return carl9170_bcn_ctrl(ar, vif_id, CARL9170_BCN_CTRL_DRAIN, 0, 0);
 60}
 61
 62static inline int carl9170_rx_filter(struct ar9170 *ar,
 63				     const unsigned int _rx_filter)
 64{
 65	__le32 rx_filter = cpu_to_le32(_rx_filter);
 66
 67	return carl9170_exec_cmd(ar, CARL9170_CMD_RX_FILTER,
 68				sizeof(rx_filter), (u8 *)&rx_filter,
 69				0, NULL);
 70}
 71
 72struct carl9170_cmd *carl9170_cmd_buf(struct ar9170 *ar,
 73	const enum carl9170_cmd_oids cmd, const unsigned int len);
 74
 75/*
 76 * Macros to facilitate writing multiple registers in a single
 77 * write-combining USB command. Note that when the first group
 78 * fails the whole thing will fail without any others attempted,
 79 * but you won't know which write in the group failed.
 80 */
 81#define carl9170_regwrite_begin(ar)					\
 82do {									\
 83	int __nreg = 0, __err = 0;					\
 84	struct ar9170 *__ar = ar;
 85
 86#define carl9170_regwrite(r, v) do {					\
 87	__ar->cmd_buf[2 * __nreg + 1] = cpu_to_le32(r);			\
 88	__ar->cmd_buf[2 * __nreg + 2] = cpu_to_le32(v);			\
 89	__nreg++;							\
 90	if ((__nreg >= PAYLOAD_MAX / 2)) {				\
 91		if (IS_ACCEPTING_CMD(__ar))				\
 92			__err = carl9170_exec_cmd(__ar,			\
 93				CARL9170_CMD_WREG, 8 * __nreg,		\
 94				(u8 *) &__ar->cmd_buf[1], 0, NULL);	\
 95		else							\
 96			goto __regwrite_out;				\
 97									\
 98		__nreg = 0;						\
 99		if (__err)						\
100			goto __regwrite_out;				\
101	}								\
102} while (0)
103
104#define carl9170_regwrite_finish()					\
105__regwrite_out :							\
106	if (__err == 0 && __nreg) {					\
107		if (IS_ACCEPTING_CMD(__ar))				\
108			__err = carl9170_exec_cmd(__ar,			\
109				CARL9170_CMD_WREG, 8 * __nreg,		\
110				(u8 *) &__ar->cmd_buf[1], 0, NULL);	\
111		__nreg = 0;						\
112	}
113
114#define carl9170_regwrite_result()					\
115	__err;								\
116} while (0);
117
118
119#define carl9170_async_regwrite_get_buf()				\
120do {									\
121	__nreg = 0;							\
122	__cmd = carl9170_cmd_buf(__carl, CARL9170_CMD_WREG_ASYNC,	\
123				 CARL9170_MAX_CMD_PAYLOAD_LEN);		\
124	if (__cmd == NULL) {						\
125		__err = -ENOMEM;					\
126		goto __async_regwrite_out;				\
127	}								\
128} while (0);
129
130#define carl9170_async_regwrite_begin(carl)				\
131do {									\
132	struct ar9170 *__carl = carl;					\
133	struct carl9170_cmd *__cmd;					\
134	unsigned int __nreg;						\
135	int  __err = 0;							\
136	carl9170_async_regwrite_get_buf();				\
137
138#define carl9170_async_regwrite_flush()					\
139do {									\
140	if (__cmd == NULL || __nreg == 0)				\
141		break;							\
142									\
143	if (IS_ACCEPTING_CMD(__carl) && __nreg) {			\
144		__cmd->hdr.len = 8 * __nreg;				\
145		__err = __carl9170_exec_cmd(__carl, __cmd, true);	\
146		__cmd = NULL;						\
147		break;							\
148	}								\
149	goto __async_regwrite_out;					\
150} while (0)
151
152#define carl9170_async_regwrite(r, v) do {				\
153	if (__cmd == NULL)						\
154		carl9170_async_regwrite_get_buf();			\
155	__cmd->wreg.regs[__nreg].addr = cpu_to_le32(r);			\
156	__cmd->wreg.regs[__nreg].val = cpu_to_le32(v);			\
157	__nreg++;							\
158	if ((__nreg >= PAYLOAD_MAX / 2))				\
159		carl9170_async_regwrite_flush();			\
160} while (0)
161
162#define carl9170_async_regwrite_finish() do {				\
163__async_regwrite_out:							\
164	if (__cmd != NULL && __err == 0)				\
165		carl9170_async_regwrite_flush();			\
166	kfree(__cmd);							\
167} while (0)								\
168
169#define carl9170_async_regwrite_result()				\
170	__err;								\
171} while (0);
172
173#endif /* __CMD_H */