summaryrefslogtreecommitdiff
path: root/drivers/media/video/bttv-if.c
blob: 19b564ab0e92e61fd4b4e5515abaebd02fb924a2 (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
/*

    bttv-if.c  --  old gpio interface to other kernel modules
		   don't use in new code, will go away in 2.7
		   have a look at bttv-gpio.c instead.

    bttv - Bt848 frame grabber driver

    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
			   & Marcus Metzler (mocm@thp.uni-koeln.de)
    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>

    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/io.h>

#include "bttvp.h"

EXPORT_SYMBOL(bttv_get_cardinfo);
EXPORT_SYMBOL(bttv_get_pcidev);
EXPORT_SYMBOL(bttv_get_id);
EXPORT_SYMBOL(bttv_gpio_enable);
EXPORT_SYMBOL(bttv_read_gpio);
EXPORT_SYMBOL(bttv_write_gpio);
EXPORT_SYMBOL(bttv_get_gpio_queue);
EXPORT_SYMBOL(bttv_i2c_call);

/* ----------------------------------------------------------------------- */
/* Exported functions - for other modules which want to access the         */
/*                      gpio ports (IR for example)                        */
/*                      see bttv.h for comments                            */

int bttv_get_cardinfo(unsigned int card, int *type, unsigned *cardid)
{
	printk("The bttv_* interface is obsolete and will go away,\n"
	       "please use the new, sysfs based interface instead.\n");
	if (card >= bttv_num) {
		return -1;
	}
	*type   = bttvs[card].c.type;
	*cardid = bttvs[card].cardid;
	return 0;
}

struct pci_dev* bttv_get_pcidev(unsigned int card)
{
	if (card >= bttv_num)
		return NULL;
	return bttvs[card].c.pci;
}

int bttv_get_id(unsigned int card)
{
	printk("The bttv_* interface is obsolete and will go away,\n"
	       "please use the new, sysfs based interface instead.\n");
	if (card >= bttv_num) {
		return -1;
	}
	return bttvs[card].c.type;
}


int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return -EINVAL;
	}

	btv = &bttvs[card];
	gpio_inout(mask,data);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,"extern enable");
	return 0;
}

int bttv_read_gpio(unsigned int card, unsigned long *data)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return -EINVAL;
	}

	btv = &bttvs[card];

	if(btv->shutdown) {
		return -ENODEV;
	}

/* prior setting BT848_GPIO_REG_INP is (probably) not needed
   because we set direct input on init */
	*data = gpio_read();
	return 0;
}

int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return -EINVAL;
	}

	btv = &bttvs[card];

/* prior setting BT848_GPIO_REG_INP is (probably) not needed
   because direct input is set on init */
	gpio_bits(mask,data);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,"extern write");
	return 0;
}

wait_queue_head_t* bttv_get_gpio_queue(unsigned int card)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return NULL;
	}

	btv = &bttvs[card];
	if (bttvs[card].shutdown) {
		return NULL;
	}
	return &btv->gpioq;
}

void bttv_i2c_call(unsigned int card, unsigned int cmd, void *arg)
{
	if (card >= bttv_num)
		return;
	bttv_call_i2c_clients(&bttvs[card], cmd, arg);
}

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */