aboutsummaryrefslogtreecommitdiff
path: root/drivers/net/wireless/rt2x00/rt2x00pci.h
blob: 9c0a4d77bc1be1e16ab79940c3c2cb0aa65859c2 (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
/*
	Copyright (C) 2004 - 2008 rt2x00 SourceForge Project
	<http://rt2x00.serialmonkey.com>

	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; if not, write to the
	Free Software Foundation, Inc.,
	59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */

/*
	Module: rt2x00pci
	Abstract: Data structures for the rt2x00pci module.
 */

#ifndef RT2X00PCI_H
#define RT2X00PCI_H

#include <linux/io.h>

/*
 * This variable should be used with the
 * pci_driver structure initialization.
 */
#define PCI_DEVICE_DATA(__ops)	.driver_data = (kernel_ulong_t)(__ops)

/*
 * Register defines.
 * Some registers require multiple attempts before success,
 * in those cases REGISTER_BUSY_COUNT attempts should be
 * taken with a REGISTER_BUSY_DELAY interval.
 */
#define REGISTER_BUSY_COUNT	5
#define REGISTER_BUSY_DELAY	100

/*
 * Register access.
 */
static inline void rt2x00pci_register_read(struct rt2x00_dev *rt2x00dev,
					   const unsigned int offset,
					   u32 *value)
{
	*value = readl(rt2x00dev->csr.base + offset);
}

static inline void
rt2x00pci_register_multiread(struct rt2x00_dev *rt2x00dev,
			     const unsigned int offset,
			     void *value, const u16 length)
{
	memcpy_fromio(value, rt2x00dev->csr.base + offset, length);
}

static inline void rt2x00pci_register_write(struct rt2x00_dev *rt2x00dev,
					    const unsigned int offset,
					    u32 value)
{
	writel(value, rt2x00dev->csr.base + offset);
}

static inline void
rt2x00pci_register_multiwrite(struct rt2x00_dev *rt2x00dev,
			      const unsigned int offset,
			      const void *value, const u16 length)
{
	memcpy_toio(rt2x00dev->csr.base + offset, value, length);
}

/**
 * rt2x00pci_regbusy_read - Read from register with busy check
 * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
 * @offset: Register offset
 * @field: Field to check if register is busy
 * @reg: Pointer to where register contents should be stored
 *
 * This function will read the given register, and checks if the
 * register is busy. If it is, it will sleep for a couple of
 * microseconds before reading the register again. If the register
 * is not read after a certain timeout, this function will return
 * FALSE.
 */
int rt2x00pci_regbusy_read(struct rt2x00_dev *rt2x00dev,
			   const unsigned int offset,
			   const struct rt2x00_field32 field,
			   u32 *reg);

/**
 * rt2x00pci_write_tx_data - Initialize data for TX operation
 * @entry: The entry where the frame is located
 *
 * This function will initialize the DMA and skb descriptor
 * to prepare the entry for the actual TX operation.
 */
int rt2x00pci_write_tx_data(struct queue_entry *entry);

/**
 * struct queue_entry_priv_pci: Per entry PCI specific information
 *
 * @desc: Pointer to device descriptor
 * @desc_dma: DMA pointer to &desc.
 * @data: Pointer to device's entry memory.
 * @data_dma: DMA pointer to &data.
 */
struct queue_entry_priv_pci {
	__le32 *desc;
	dma_addr_t desc_dma;
};

/**
 * rt2x00pci_rxdone - Handle RX done events
 * @rt2x00dev: Device pointer, see &struct rt2x00_dev.
 */
void rt2x00pci_rxdone(struct rt2x00_dev *rt2x00dev);

/*
 * Device initialization handlers.
 */
int rt2x00pci_initialize(struct rt2x00_dev *rt2x00dev);
void rt2x00pci_uninitialize(struct rt2x00_dev *rt2x00dev);

/*
 * PCI driver handlers.
 */
int rt2x00pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id);
void rt2x00pci_remove(struct pci_dev *pci_dev);
#ifdef CONFIG_PM
int rt2x00pci_suspend(struct pci_dev *pci_dev, pm_message_t state);
int rt2x00pci_resume(struct pci_dev *pci_dev);
#else
#define rt2x00pci_suspend	NULL
#define rt2x00pci_resume	NULL
#endif /* CONFIG_PM */

#endif /* RT2X00PCI_H */