[deliverable/linux.git] / drivers / media / video / bt8xx / bttv-if.c

/*

    bttv-if.c  --  old gpio interface to other kernel modules
		   don't use in new code, will go away in 2.7
		   have a look at bttv-gpio.c instead.

    bttv - Bt848 frame grabber driver

    Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@thp.uni-koeln.de)
			   & Marcus Metzler (mocm@thp.uni-koeln.de)
    (c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include <linux/module.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <asm/io.h>

#include "bttvp.h"

EXPORT_SYMBOL(bttv_get_pcidev);
EXPORT_SYMBOL(bttv_gpio_enable);
EXPORT_SYMBOL(bttv_read_gpio);
EXPORT_SYMBOL(bttv_write_gpio);

/* ----------------------------------------------------------------------- */
/* Exported functions - for other modules which want to access the         */
/*                      gpio ports (IR for example)                        */
/*                      see bttv.h for comments                            */

struct pci_dev* bttv_get_pcidev(unsigned int card)
{
	if (card >= bttv_num)
		return NULL;
	if (!bttvs[card])
		return NULL;

	return bttvs[card]->c.pci;
}


int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return -EINVAL;
	}

	btv = bttvs[card];
	if (!btv)
		return -ENODEV;

	gpio_inout(mask,data);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,"extern enable");
	return 0;
}

int bttv_read_gpio(unsigned int card, unsigned long *data)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return -EINVAL;
	}

	btv = bttvs[card];
	if (!btv)
		return -ENODEV;

	if(btv->shutdown) {
		return -ENODEV;
	}

/* prior setting BT848_GPIO_REG_INP is (probably) not needed
   because we set direct input on init */
	*data = gpio_read();
	return 0;
}

int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
{
	struct bttv *btv;

	if (card >= bttv_num) {
		return -EINVAL;
	}

	btv = bttvs[card];
	if (!btv)
		return -ENODEV;

/* prior setting BT848_GPIO_REG_INP is (probably) not needed
   because direct input is set on init */
	gpio_bits(mask,data);
	if (bttv_gpio)
		bttv_gpio_tracking(btv,"extern write");
	return 0;
}

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */
Commit	Line	Data
1da177e4	1	/*
1da177e4 LT	2
1da177e4 LT	3	bttv-if.c -- old gpio interface to other kernel modules
4ac97914	4	don't use in new code, will go away in 2.7
1da177e4 LT	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)
4ac97914	10	& Marcus Metzler (mocm@thp.uni-koeln.de)
1da177e4 LT	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
1da177e4	36	EXPORT_SYMBOL(bttv_get_pcidev);
1da177e4 LT	37	EXPORT_SYMBOL(bttv_gpio_enable);
	38	EXPORT_SYMBOL(bttv_read_gpio);
	39	EXPORT_SYMBOL(bttv_write_gpio);
1da177e4 LT	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
1da177e4 LT	46	struct pci_dev* bttv_get_pcidev(unsigned int card)
	47	{
	48	if (card >= bttv_num)
	49	return NULL;
4b10d3b6 TP	50	if (!bttvs[card])
	51	return NULL;
	52
	53	return bttvs[card]->c.pci;
1da177e4 LT	54	}
1da177e4 LT	55
1da177e4 LT	56
	57	int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
	58	{
	59	struct bttv *btv;
	60
	61	if (card >= bttv_num) {
	62	return -EINVAL;
	63	}
	64
4b10d3b6 TP	65	btv = bttvs[card];
	66	if (!btv)
	67	return -ENODEV;
	68
1da177e4 LT	69	gpio_inout(mask,data);
	70	if (bttv_gpio)
	71	bttv_gpio_tracking(btv,"extern enable");
	72	return 0;
	73	}
	74
	75	int bttv_read_gpio(unsigned int card, unsigned long *data)
	76	{
	77	struct bttv *btv;
	78
	79	if (card >= bttv_num) {
	80	return -EINVAL;
	81	}
	82
4b10d3b6 TP	83	btv = bttvs[card];
	84	if (!btv)
	85	return -ENODEV;
1da177e4 LT	86
	87	if(btv->shutdown) {
	88	return -ENODEV;
	89	}
	90
	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;
	95	}
	96
	97	int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
	98	{
	99	struct bttv *btv;
	100
	101	if (card >= bttv_num) {
	102	return -EINVAL;
	103	}
	104
4b10d3b6 TP	105	btv = bttvs[card];
	106	if (!btv)
	107	return -ENODEV;
1da177e4 LT	108
	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;
	115	}
	116
1da177e4 LT	117	/*
	118	* Local variables:
	119	* c-basic-offset: 8
	120	* End:
	121	*/