drivers/media/video/bttv-if.c

   1 /*
   2     $Id: bttv-if.c,v 1.4 2004/11/17 18:47:47 kraxel Exp $
   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     This program is free software; you can redistribute it and/or modify
  15     it under the terms of the GNU General Public License as published by
  16     the Free Software Foundation; either version 2 of the License, or
  17     (at your option) any later version.
  18
  19     This program is distributed in the hope that it will be useful,
  20     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22     GNU General Public License for more details.
  23
  24     You should have received a copy of the GNU General Public License
  25     along with this program; if not, write to the Free Software
  26     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  27
  28 */
  29
  30 #include <linux/module.h>
  31 #include <linux/init.h>
  32 #include <linux/delay.h>
  33 #include <asm/io.h>
  34
  35 #include "bttvp.h"
  36
  37 EXPORT_SYMBOL(bttv_get_cardinfo);
  38 EXPORT_SYMBOL(bttv_get_pcidev);
  39 EXPORT_SYMBOL(bttv_get_id);
  40 EXPORT_SYMBOL(bttv_gpio_enable);
  41 EXPORT_SYMBOL(bttv_read_gpio);
  42 EXPORT_SYMBOL(bttv_write_gpio);
  43 EXPORT_SYMBOL(bttv_get_gpio_queue);
  44 EXPORT_SYMBOL(bttv_i2c_call);
  45
  46 /* ----------------------------------------------------------------------- */
  47 /* Exported functions - for other modules which want to access the         */
  48 /*                      gpio ports (IR for example)                        */
  49 /*                      see bttv.h for comments                            */
  50
  51 int bttv_get_cardinfo(unsigned int card, int *type, unsigned *cardid)
  52 {
  53         printk("The bttv_* interface is obsolete and will go away,\n"
  54                "please use the new, sysfs based interface instead.\n");
  55         if (card >= bttv_num) {
  56                 return -1;
  57         }
  58         *type   = bttvs[card].c.type;
  59         *cardid = bttvs[card].cardid;
  60         return 0;
  61 }
  62
  63 struct pci_dev* bttv_get_pcidev(unsigned int card)
  64 {
  65         if (card >= bttv_num)
  66                 return NULL;
  67         return bttvs[card].c.pci;
  68 }
  69
  70 int bttv_get_id(unsigned int card)
  71 {
  72         printk("The bttv_* interface is obsolete and will go away,\n"
  73                "please use the new, sysfs based interface instead.\n");
  74         if (card >= bttv_num) {
  75                 return -1;
  76         }
  77         return bttvs[card].c.type;
  78 }
  79
  80
  81 int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
  82 {
  83         struct bttv *btv;
  84
  85         if (card >= bttv_num) {
  86                 return -EINVAL;
  87         }
  88
  89         btv = &bttvs[card];
  90         gpio_inout(mask,data);
  91         if (bttv_gpio)
  92                 bttv_gpio_tracking(btv,"extern enable");
  93         return 0;
  94 }
  95
  96 int bttv_read_gpio(unsigned int card, unsigned long *data)
  97 {
  98         struct bttv *btv;
  99
 100         if (card >= bttv_num) {
 101                 return -EINVAL;
 102         }
 103
 104         btv = &bttvs[card];
 105
 106         if(btv->shutdown) {
 107                 return -ENODEV;
 108         }
 109
 110 /* prior setting BT848_GPIO_REG_INP is (probably) not needed
 111    because we set direct input on init */
 112         *data = gpio_read();
 113         return 0;
 114 }
 115
 116 int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
 117 {
 118         struct bttv *btv;
 119
 120         if (card >= bttv_num) {
 121                 return -EINVAL;
 122         }
 123
 124         btv = &bttvs[card];
 125
 126 /* prior setting BT848_GPIO_REG_INP is (probably) not needed
 127    because direct input is set on init */
 128         gpio_bits(mask,data);
 129         if (bttv_gpio)
 130                 bttv_gpio_tracking(btv,"extern write");
 131         return 0;
 132 }
 133
 134 wait_queue_head_t* bttv_get_gpio_queue(unsigned int card)
 135 {
 136         struct bttv *btv;
 137
 138         if (card >= bttv_num) {
 139                 return NULL;
 140         }
 141
 142         btv = &bttvs[card];
 143         if (bttvs[card].shutdown) {
 144                 return NULL;
 145         }
 146         return &btv->gpioq;
 147 }
 148
 149 void bttv_i2c_call(unsigned int card, unsigned int cmd, void *arg)
 150 {
 151         if (card >= bttv_num)
 152                 return;
 153         bttv_call_i2c_clients(&bttvs[card], cmd, arg);
 154 }
 155
 156 /*
 157  * Local variables:
 158  * c-basic-offset: 8
 159  * End:
 160  */