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Hans Verkuil137c5792012-02-03 08:28:56 -03001/*
2 * Framework for ISA radio drivers.
3 * This takes care of all the V4L2 scaffolding, allowing the ISA drivers
4 * to concentrate on the actual hardware operation.
5 *
6 * Copyright (C) 2012 Hans Verkuil <hans.verkuil@cisco.com>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA
21 */
22
23#ifndef _RADIO_ISA_H_
24#define _RADIO_ISA_H_
25
26#include <linux/isa.h>
Ondrej Zary865d7ec2012-03-22 14:53:01 -030027#include <linux/pnp.h>
Hans Verkuil137c5792012-02-03 08:28:56 -030028#include <linux/videodev2.h>
29#include <media/v4l2-device.h>
30#include <media/v4l2-ctrls.h>
31
32struct radio_isa_driver;
33struct radio_isa_ops;
34
35/* Core structure for radio ISA cards */
36struct radio_isa_card {
37 const struct radio_isa_driver *drv;
38 struct v4l2_device v4l2_dev;
39 struct v4l2_ctrl_handler hdl;
40 struct video_device vdev;
41 struct mutex lock;
42 const struct radio_isa_ops *ops;
43 struct { /* mute/volume cluster */
44 struct v4l2_ctrl *mute;
45 struct v4l2_ctrl *volume;
46 };
47 /* I/O port */
48 int io;
49
50 /* Card is in stereo audio mode */
51 bool stereo;
52 /* Current frequency */
53 u32 freq;
54};
55
56struct radio_isa_ops {
57 /* Allocate and initialize a radio_isa_card struct */
58 struct radio_isa_card *(*alloc)(void);
59 /* Probe whether a card is present at the given port */
60 bool (*probe)(struct radio_isa_card *isa, int io);
61 /* Special card initialization can be done here, this is called after
62 * the standard controls are registered, but before they are setup,
63 * thus allowing drivers to add their own controls here. */
64 int (*init)(struct radio_isa_card *isa);
65 /* Set mute and volume. */
66 int (*s_mute_volume)(struct radio_isa_card *isa, bool mute, int volume);
67 /* Set frequency */
68 int (*s_frequency)(struct radio_isa_card *isa, u32 freq);
69 /* Set stereo/mono audio mode */
70 int (*s_stereo)(struct radio_isa_card *isa, bool stereo);
71 /* Get rxsubchans value for VIDIOC_G_TUNER */
72 u32 (*g_rxsubchans)(struct radio_isa_card *isa);
73 /* Get the signal strength for VIDIOC_G_TUNER */
74 u32 (*g_signal)(struct radio_isa_card *isa);
75};
76
77/* Top level structure needed to instantiate the cards */
78struct radio_isa_driver {
79 struct isa_driver driver;
Ondrej Zary865d7ec2012-03-22 14:53:01 -030080#ifdef CONFIG_PNP
81 struct pnp_driver pnp_driver;
82#endif
Hans Verkuil137c5792012-02-03 08:28:56 -030083 const struct radio_isa_ops *ops;
84 /* The module_param_array with the specified I/O ports */
85 int *io_params;
86 /* The module_param_array with the radio_nr values */
87 int *radio_nr_params;
88 /* Whether we should probe for possible cards */
89 bool probe;
90 /* The list of possible I/O ports */
91 const int *io_ports;
92 /* The size of that list */
93 int num_of_io_ports;
94 /* The region size to request */
95 unsigned region_size;
96 /* The name of the card */
97 const char *card;
98 /* Card can capture stereo audio */
99 bool has_stereo;
100 /* The maximum volume for the volume control. If 0, then there
101 is no volume control possible. */
102 int max_volume;
103};
104
105int radio_isa_match(struct device *pdev, unsigned int dev);
106int radio_isa_probe(struct device *pdev, unsigned int dev);
107int radio_isa_remove(struct device *pdev, unsigned int dev);
Ondrej Zary865d7ec2012-03-22 14:53:01 -0300108#ifdef CONFIG_PNP
109int radio_isa_pnp_probe(struct pnp_dev *dev,
110 const struct pnp_device_id *dev_id);
111void radio_isa_pnp_remove(struct pnp_dev *dev);
112#endif
Hans Verkuil137c5792012-02-03 08:28:56 -0300113
114#endif