1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | |
4 | bttv-if.c -- old gpio interface to other kernel modules |
5 | don't use in new code, will go away in 2.7 |
6 | have a look at bttv-gpio.c instead. |
7 | |
8 | bttv - Bt848 frame grabber driver |
9 | |
10 | Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de) |
11 | & Marcus Metzler (mocm@thp.uni-koeln.de) |
12 | (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org> |
13 | |
14 | |
15 | */ |
16 | |
17 | #include <linux/module.h> |
18 | #include <linux/init.h> |
19 | #include <linux/delay.h> |
20 | #include <asm/io.h> |
21 | |
22 | #include "bttvp.h" |
23 | |
24 | EXPORT_SYMBOL(bttv_get_pcidev); |
25 | EXPORT_SYMBOL(bttv_gpio_enable); |
26 | EXPORT_SYMBOL(bttv_read_gpio); |
27 | EXPORT_SYMBOL(bttv_write_gpio); |
28 | |
29 | /* ----------------------------------------------------------------------- */ |
30 | /* Exported functions - for other modules which want to access the */ |
31 | /* gpio ports (IR for example) */ |
32 | /* see bttv.h for comments */ |
33 | |
34 | struct pci_dev* bttv_get_pcidev(unsigned int card) |
35 | { |
36 | if (card >= bttv_num) |
37 | return NULL; |
38 | if (!bttvs[card]) |
39 | return NULL; |
40 | |
41 | return bttvs[card]->c.pci; |
42 | } |
43 | |
44 | |
45 | int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data) |
46 | { |
47 | struct bttv *btv; |
48 | |
49 | if (card >= bttv_num) { |
50 | return -EINVAL; |
51 | } |
52 | |
53 | btv = bttvs[card]; |
54 | if (!btv) |
55 | return -ENODEV; |
56 | |
57 | gpio_inout(mask,data); |
58 | if (bttv_gpio) |
59 | bttv_gpio_tracking(btv,comment: "extern enable" ); |
60 | return 0; |
61 | } |
62 | |
63 | int bttv_read_gpio(unsigned int card, unsigned long *data) |
64 | { |
65 | struct bttv *btv; |
66 | |
67 | if (card >= bttv_num) { |
68 | return -EINVAL; |
69 | } |
70 | |
71 | btv = bttvs[card]; |
72 | if (!btv) |
73 | return -ENODEV; |
74 | |
75 | if(btv->shutdown) { |
76 | return -ENODEV; |
77 | } |
78 | |
79 | /* prior setting BT848_GPIO_REG_INP is (probably) not needed |
80 | because we set direct input on init */ |
81 | *data = gpio_read(); |
82 | return 0; |
83 | } |
84 | |
85 | int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data) |
86 | { |
87 | struct bttv *btv; |
88 | |
89 | if (card >= bttv_num) { |
90 | return -EINVAL; |
91 | } |
92 | |
93 | btv = bttvs[card]; |
94 | if (!btv) |
95 | return -ENODEV; |
96 | |
97 | /* prior setting BT848_GPIO_REG_INP is (probably) not needed |
98 | because direct input is set on init */ |
99 | gpio_bits(mask,data); |
100 | if (bttv_gpio) |
101 | bttv_gpio_tracking(btv,comment: "extern write" ); |
102 | return 0; |
103 | } |
104 | |