1/*
2
3    bttv-if.c  --  old gpio interface to other kernel modules
4		   don't use in new code, will go away in 2.7
5		   have a look at bttv-gpio.c instead.
6
7    bttv - Bt848 frame grabber driver
8
9    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
10			   & Marcus Metzler (mocm@thp.uni-koeln.de)
11    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
12
13    This program is free software; you can redistribute it and/or modify
14    it under the terms of the GNU General Public License as published by
15    the Free Software Foundation; either version 2 of the License, or
16    (at your option) any later version.
17
18    This program is distributed in the hope that it will be useful,
19    but WITHOUT ANY WARRANTY; without even the implied warranty of
20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
21    GNU General Public License for more details.
22
23    You should have received a copy of the GNU General Public License
24    along with this program; if not, write to the Free Software
25    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26
27*/
28
29#include <linux/module.h>
30#include <linux/init.h>
31#include <linux/delay.h>
32#include <asm/io.h>
33
34#include "bttvp.h"
35
36EXPORT_SYMBOL(bttv_get_pcidev);
37EXPORT_SYMBOL(bttv_gpio_enable);
38EXPORT_SYMBOL(bttv_read_gpio);
39EXPORT_SYMBOL(bttv_write_gpio);
40
41/* ----------------------------------------------------------------------- */
42/* Exported functions - for other modules which want to access the         */
43/*                      gpio ports (IR for example)                        */
44/*                      see bttv.h for comments                            */
45
46struct pci_dev* bttv_get_pcidev(unsigned int card)
47{
48	if (card >= bttv_num)
49		return NULL;
50	return bttvs[card].c.pci;
51}
52
53
54int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
55{
56	struct bttv *btv;
57
58	if (card >= bttv_num) {
59		return -EINVAL;
60	}
61
62	btv = &bttvs[card];
63	gpio_inout(mask,data);
64	if (bttv_gpio)
65		bttv_gpio_tracking(btv,"extern enable");
66	return 0;
67}
68
69int bttv_read_gpio(unsigned int card, unsigned long *data)
70{
71	struct bttv *btv;
72
73	if (card >= bttv_num) {
74		return -EINVAL;
75	}
76
77	btv = &bttvs[card];
78
79	if(btv->shutdown) {
80		return -ENODEV;
81	}
82
83/* prior setting BT848_GPIO_REG_INP is (probably) not needed
84   because we set direct input on init */
85	*data = gpio_read();
86	return 0;
87}
88
89int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
90{
91	struct bttv *btv;
92
93	if (card >= bttv_num) {
94		return -EINVAL;
95	}
96
97	btv = &bttvs[card];
98
99/* prior setting BT848_GPIO_REG_INP is (probably) not needed
100   because direct input is set on init */
101	gpio_bits(mask,data);
102	if (bttv_gpio)
103		bttv_gpio_tracking(btv,"extern write");
104	return 0;
105}
106
107/*
108 * Local variables:
109 * c-basic-offset: 8
110 * End:
111 */
112