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[pohmelfs.git] / drivers / media / video / bt8xx / bttv-if.c
bloba6a540dc9e4b526c81c68c782a36db7ecab253fe
1 /*
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.
7 bttv - Bt848 frame grabber driver
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>
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.
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.
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.
29 #include <linux/module.h>
30 #include <linux/init.h>
31 #include <linux/delay.h>
32 #include <asm/io.h>
34 #include "bttvp.h"
36 EXPORT_SYMBOL(bttv_get_pcidev);
37 EXPORT_SYMBOL(bttv_gpio_enable);
38 EXPORT_SYMBOL(bttv_read_gpio);
39 EXPORT_SYMBOL(bttv_write_gpio);
41 /* ----------------------------------------------------------------------- */
42 /* Exported functions - for other modules which want to access the */
43 /* gpio ports (IR for example) */
44 /* see bttv.h for comments */
46 struct pci_dev* bttv_get_pcidev(unsigned int card)
48 if (card >= bttv_num)
49 return NULL;
50 if (!bttvs[card])
51 return NULL;
53 return bttvs[card]->c.pci;
57 int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
59 struct bttv *btv;
61 if (card >= bttv_num) {
62 return -EINVAL;
65 btv = bttvs[card];
66 if (!btv)
67 return -ENODEV;
69 gpio_inout(mask,data);
70 if (bttv_gpio)
71 bttv_gpio_tracking(btv,"extern enable");
72 return 0;
75 int bttv_read_gpio(unsigned int card, unsigned long *data)
77 struct bttv *btv;
79 if (card >= bttv_num) {
80 return -EINVAL;
83 btv = bttvs[card];
84 if (!btv)
85 return -ENODEV;
87 if(btv->shutdown) {
88 return -ENODEV;
91 /* prior setting BT848_GPIO_REG_INP is (probably) not needed
92 because we set direct input on init */
93 *data = gpio_read();
94 return 0;
97 int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
99 struct bttv *btv;
101 if (card >= bttv_num) {
102 return -EINVAL;
105 btv = bttvs[card];
106 if (!btv)
107 return -ENODEV;
109 /* prior setting BT848_GPIO_REG_INP is (probably) not needed
110 because direct input is set on init */
111 gpio_bits(mask,data);
112 if (bttv_gpio)
113 bttv_gpio_tracking(btv,"extern write");
114 return 0;
118 * Local variables:
119 * c-basic-offset: 8
120 * End: