1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun
4*4882a593Smuzhiyun bttv-if.c -- old gpio interface to other kernel modules
5*4882a593Smuzhiyun don't use in new code, will go away in 2.7
6*4882a593Smuzhiyun have a look at bttv-gpio.c instead.
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun bttv - Bt848 frame grabber driver
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
11*4882a593Smuzhiyun & Marcus Metzler (mocm@thp.uni-koeln.de)
12*4882a593Smuzhiyun (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun */
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun #include <linux/module.h>
18*4882a593Smuzhiyun #include <linux/init.h>
19*4882a593Smuzhiyun #include <linux/delay.h>
20*4882a593Smuzhiyun #include <asm/io.h>
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun #include "bttvp.h"
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun EXPORT_SYMBOL(bttv_get_pcidev);
25*4882a593Smuzhiyun EXPORT_SYMBOL(bttv_gpio_enable);
26*4882a593Smuzhiyun EXPORT_SYMBOL(bttv_read_gpio);
27*4882a593Smuzhiyun EXPORT_SYMBOL(bttv_write_gpio);
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun /* ----------------------------------------------------------------------- */
30*4882a593Smuzhiyun /* Exported functions - for other modules which want to access the */
31*4882a593Smuzhiyun /* gpio ports (IR for example) */
32*4882a593Smuzhiyun /* see bttv.h for comments */
33*4882a593Smuzhiyun
bttv_get_pcidev(unsigned int card)34*4882a593Smuzhiyun struct pci_dev* bttv_get_pcidev(unsigned int card)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun if (card >= bttv_num)
37*4882a593Smuzhiyun return NULL;
38*4882a593Smuzhiyun if (!bttvs[card])
39*4882a593Smuzhiyun return NULL;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun return bttvs[card]->c.pci;
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun
bttv_gpio_enable(unsigned int card,unsigned long mask,unsigned long data)45*4882a593Smuzhiyun int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun struct bttv *btv;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun if (card >= bttv_num) {
50*4882a593Smuzhiyun return -EINVAL;
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun btv = bttvs[card];
54*4882a593Smuzhiyun if (!btv)
55*4882a593Smuzhiyun return -ENODEV;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun gpio_inout(mask,data);
58*4882a593Smuzhiyun if (bttv_gpio)
59*4882a593Smuzhiyun bttv_gpio_tracking(btv,"extern enable");
60*4882a593Smuzhiyun return 0;
61*4882a593Smuzhiyun }
62*4882a593Smuzhiyun
bttv_read_gpio(unsigned int card,unsigned long * data)63*4882a593Smuzhiyun int bttv_read_gpio(unsigned int card, unsigned long *data)
64*4882a593Smuzhiyun {
65*4882a593Smuzhiyun struct bttv *btv;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun if (card >= bttv_num) {
68*4882a593Smuzhiyun return -EINVAL;
69*4882a593Smuzhiyun }
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun btv = bttvs[card];
72*4882a593Smuzhiyun if (!btv)
73*4882a593Smuzhiyun return -ENODEV;
74*4882a593Smuzhiyun
75*4882a593Smuzhiyun if(btv->shutdown) {
76*4882a593Smuzhiyun return -ENODEV;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun /* prior setting BT848_GPIO_REG_INP is (probably) not needed
80*4882a593Smuzhiyun because we set direct input on init */
81*4882a593Smuzhiyun *data = gpio_read();
82*4882a593Smuzhiyun return 0;
83*4882a593Smuzhiyun }
84*4882a593Smuzhiyun
bttv_write_gpio(unsigned int card,unsigned long mask,unsigned long data)85*4882a593Smuzhiyun int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
86*4882a593Smuzhiyun {
87*4882a593Smuzhiyun struct bttv *btv;
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun if (card >= bttv_num) {
90*4882a593Smuzhiyun return -EINVAL;
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun
93*4882a593Smuzhiyun btv = bttvs[card];
94*4882a593Smuzhiyun if (!btv)
95*4882a593Smuzhiyun return -ENODEV;
96*4882a593Smuzhiyun
97*4882a593Smuzhiyun /* prior setting BT848_GPIO_REG_INP is (probably) not needed
98*4882a593Smuzhiyun because direct input is set on init */
99*4882a593Smuzhiyun gpio_bits(mask,data);
100*4882a593Smuzhiyun if (bttv_gpio)
101*4882a593Smuzhiyun bttv_gpio_tracking(btv,"extern write");
102*4882a593Smuzhiyun return 0;
103*4882a593Smuzhiyun }
104