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74ba9207e1
Based on 1 normalized pattern(s): 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 extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 441 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190520071858.739733335@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
103 lines
2.1 KiB
C
103 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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bttv-if.c -- old gpio interface to other kernel modules
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don't use in new code, will go away in 2.7
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have a look at bttv-gpio.c instead.
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bttv - Bt848 frame grabber driver
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Copyright (C) 1996,97,98 Ralph Metzler (rjkm@thp.uni-koeln.de)
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& Marcus Metzler (mocm@thp.uni-koeln.de)
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(c) 1999-2003 Gerd Knorr <kraxel@bytesex.org>
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*/
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <asm/io.h>
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#include "bttvp.h"
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EXPORT_SYMBOL(bttv_get_pcidev);
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EXPORT_SYMBOL(bttv_gpio_enable);
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EXPORT_SYMBOL(bttv_read_gpio);
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EXPORT_SYMBOL(bttv_write_gpio);
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/* ----------------------------------------------------------------------- */
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/* Exported functions - for other modules which want to access the */
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/* gpio ports (IR for example) */
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/* see bttv.h for comments */
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struct pci_dev* bttv_get_pcidev(unsigned int card)
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{
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if (card >= bttv_num)
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return NULL;
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if (!bttvs[card])
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return NULL;
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return bttvs[card]->c.pci;
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}
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int bttv_gpio_enable(unsigned int card, unsigned long mask, unsigned long data)
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{
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struct bttv *btv;
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if (card >= bttv_num) {
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return -EINVAL;
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}
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btv = bttvs[card];
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if (!btv)
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return -ENODEV;
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gpio_inout(mask,data);
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if (bttv_gpio)
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bttv_gpio_tracking(btv,"extern enable");
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return 0;
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}
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int bttv_read_gpio(unsigned int card, unsigned long *data)
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{
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struct bttv *btv;
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if (card >= bttv_num) {
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return -EINVAL;
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}
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btv = bttvs[card];
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if (!btv)
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return -ENODEV;
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if(btv->shutdown) {
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return -ENODEV;
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}
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/* prior setting BT848_GPIO_REG_INP is (probably) not needed
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because we set direct input on init */
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*data = gpio_read();
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return 0;
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}
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int bttv_write_gpio(unsigned int card, unsigned long mask, unsigned long data)
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{
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struct bttv *btv;
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if (card >= bttv_num) {
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return -EINVAL;
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}
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btv = bttvs[card];
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if (!btv)
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return -ENODEV;
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/* prior setting BT848_GPIO_REG_INP is (probably) not needed
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because direct input is set on init */
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gpio_bits(mask,data);
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if (bttv_gpio)
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bttv_gpio_tracking(btv,"extern write");
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return 0;
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}
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