6a529c1a4a
Change locking to allow tea575x-radio device to be opened multiple times. Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
64 lines
2 KiB
C
64 lines
2 KiB
C
#ifndef __SOUND_TEA575X_TUNER_H
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#define __SOUND_TEA575X_TUNER_H
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/*
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* ALSA driver for TEA5757/5759 Philips AM/FM tuner chips
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*
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* Copyright (c) 2004 Jaroslav Kysela <perex@perex.cz>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#include <linux/videodev2.h>
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#include <media/v4l2-ctrls.h>
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#include <media/v4l2-dev.h>
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#define TEA575X_FMIF 10700
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#define TEA575X_DATA (1 << 0)
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#define TEA575X_CLK (1 << 1)
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#define TEA575X_WREN (1 << 2)
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#define TEA575X_MOST (1 << 3)
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struct snd_tea575x;
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struct snd_tea575x_ops {
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void (*set_pins)(struct snd_tea575x *tea, u8 pins);
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u8 (*get_pins)(struct snd_tea575x *tea);
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void (*set_direction)(struct snd_tea575x *tea, bool output);
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};
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struct snd_tea575x {
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struct video_device vd; /* video device */
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bool tea5759; /* 5759 chip is present */
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bool mute; /* Device is muted? */
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bool stereo; /* receiving stereo */
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bool tuned; /* tuned to a station */
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unsigned int val; /* hw value */
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unsigned long freq; /* frequency */
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struct mutex mutex;
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struct snd_tea575x_ops *ops;
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void *private_data;
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u8 card[32];
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u8 bus_info[32];
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struct v4l2_ctrl_handler ctrl_handler;
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int (*ext_init)(struct snd_tea575x *tea);
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};
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int snd_tea575x_init(struct snd_tea575x *tea);
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void snd_tea575x_exit(struct snd_tea575x *tea);
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#endif /* __SOUND_TEA575X_TUNER_H */
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