summaryrefslogtreecommitdiff
path: root/drivers/net/wireless/iwlwifi/iwl-io.c
blob: bff3ac96c00bceb380d7780b263d66db384ef34d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
/******************************************************************************
 *
 * Copyright(c) 2003 - 2012 Intel Corporation. All rights reserved.
 *
 * Portions of this file are derived from the ipw3945 project.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
 * 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; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * The full GNU General Public License is included in this distribution in the
 * file called LICENSE.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 *****************************************************************************/
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/export.h>

#include "iwl-io.h"
#include "iwl-csr.h"
#include "iwl-debug.h"

#define IWL_POLL_INTERVAL 10	/* microseconds */

void __iwl_set_bit(struct iwl_trans *trans, u32 reg, u32 mask)
{
	iwl_write32(trans, reg, iwl_read32(trans, reg) | mask);
}

void __iwl_clear_bit(struct iwl_trans *trans, u32 reg, u32 mask)
{
	iwl_write32(trans, reg, iwl_read32(trans, reg) & ~mask);
}

void iwl_set_bit(struct iwl_trans *trans, u32 reg, u32 mask)
{
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	__iwl_set_bit(trans, reg, mask);
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_set_bit);

void iwl_clear_bit(struct iwl_trans *trans, u32 reg, u32 mask)
{
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	__iwl_clear_bit(trans, reg, mask);
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_clear_bit);

void iwl_set_bits_mask(struct iwl_trans *trans, u32 reg, u32 mask, u32 value)
{
	unsigned long flags;
	u32 v;

#ifdef CONFIG_IWLWIFI_DEBUG
	WARN_ON_ONCE(value & ~mask);
#endif

	spin_lock_irqsave(&trans->reg_lock, flags);
	v = iwl_read32(trans, reg);
	v &= ~mask;
	v |= value;
	iwl_write32(trans, reg, v);
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_set_bits_mask);

int iwl_poll_bit(struct iwl_trans *trans, u32 addr,
		 u32 bits, u32 mask, int timeout)
{
	int t = 0;

	do {
		if ((iwl_read32(trans, addr) & mask) == (bits & mask))
			return t;
		udelay(IWL_POLL_INTERVAL);
		t += IWL_POLL_INTERVAL;
	} while (t < timeout);

	return -ETIMEDOUT;
}
EXPORT_SYMBOL_GPL(iwl_poll_bit);

u32 iwl_read_direct32(struct iwl_trans *trans, u32 reg)
{
	u32 value = 0x5a5a5a5a;
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		value = iwl_read32(trans, reg);
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);

	return value;
}
EXPORT_SYMBOL_GPL(iwl_read_direct32);

void iwl_write_direct32(struct iwl_trans *trans, u32 reg, u32 value)
{
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		iwl_write32(trans, reg, value);
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_write_direct32);

int iwl_poll_direct_bit(struct iwl_trans *trans, u32 addr, u32 mask,
			int timeout)
{
	int t = 0;

	do {
		if ((iwl_read_direct32(trans, addr) & mask) == mask)
			return t;
		udelay(IWL_POLL_INTERVAL);
		t += IWL_POLL_INTERVAL;
	} while (t < timeout);

	return -ETIMEDOUT;
}
EXPORT_SYMBOL_GPL(iwl_poll_direct_bit);

static inline u32 __iwl_read_prph(struct iwl_trans *trans, u32 ofs)
{
	u32 val = iwl_trans_read_prph(trans, ofs);
	trace_iwlwifi_dev_ioread_prph32(trans->dev, ofs, val);
	return val;
}

static inline void __iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
{
	trace_iwlwifi_dev_iowrite_prph32(trans->dev, ofs, val);
	iwl_trans_write_prph(trans, ofs, val);
}

u32 iwl_read_prph(struct iwl_trans *trans, u32 ofs)
{
	unsigned long flags;
	u32 val = 0x5a5a5a5a;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		val = __iwl_read_prph(trans, ofs);
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);
	return val;
}
EXPORT_SYMBOL_GPL(iwl_read_prph);

void iwl_write_prph(struct iwl_trans *trans, u32 ofs, u32 val)
{
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		__iwl_write_prph(trans, ofs, val);
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_write_prph);

void iwl_set_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
{
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		__iwl_write_prph(trans, ofs,
				 __iwl_read_prph(trans, ofs) | mask);
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_set_bits_prph);

void iwl_set_bits_mask_prph(struct iwl_trans *trans, u32 ofs,
			    u32 bits, u32 mask)
{
	unsigned long flags;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		__iwl_write_prph(trans, ofs,
				 (__iwl_read_prph(trans, ofs) & mask) | bits);
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_set_bits_mask_prph);

void iwl_clear_bits_prph(struct iwl_trans *trans, u32 ofs, u32 mask)
{
	unsigned long flags;
	u32 val;

	spin_lock_irqsave(&trans->reg_lock, flags);
	if (iwl_trans_grab_nic_access(trans, false)) {
		val = __iwl_read_prph(trans, ofs);
		__iwl_write_prph(trans, ofs, (val & ~mask));
		iwl_trans_release_nic_access(trans);
	}
	spin_unlock_irqrestore(&trans->reg_lock, flags);
}
EXPORT_SYMBOL_GPL(iwl_clear_bits_prph);