blob: 577956c5410bf44b478ff8f8166b3a38edb5026a [file] [log] [blame]
Hans Verkuilac247432007-07-27 06:56:50 -03001/*
2 * vp27smpx - driver version 0.0.1
3 *
4 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
5 *
Kazuhiko Kawakamida80be22007-08-18 11:39:28 -03006 * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com>
7 * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp>
Hans Verkuilac247432007-07-27 06:56:50 -03008 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 */
23
24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/ioctl.h>
27#include <asm/uaccess.h>
28#include <linux/i2c.h>
29#include <linux/i2c-id.h>
Hans Verkuil33b687c2008-07-25 05:32:50 -030030#include <linux/videodev2.h>
Hans Verkuilac247432007-07-27 06:56:50 -030031#include <media/v4l2-common.h>
32#include <media/v4l2-chip-ident.h>
Hans Verkuilf69d4192007-12-12 07:24:27 -030033#include <media/v4l2-i2c-drv.h>
Hans Verkuilac247432007-07-27 06:56:50 -030034
35MODULE_DESCRIPTION("vp27smpx driver");
36MODULE_AUTHOR("Hans Verkuil");
37MODULE_LICENSE("GPL");
38
Hans Verkuilac247432007-07-27 06:56:50 -030039
40/* ----------------------------------------------------------------------- */
41
42struct vp27smpx_state {
43 int radio;
44 u32 audmode;
45};
46
47static void vp27smpx_set_audmode(struct i2c_client *client, u32 audmode)
48{
49 struct vp27smpx_state *state = i2c_get_clientdata(client);
50 u8 data[3] = { 0x00, 0x00, 0x04 };
51
52 switch (audmode) {
Hans Verkuil35df38c2007-12-12 07:40:54 -030053 case V4L2_TUNER_MODE_MONO:
54 case V4L2_TUNER_MODE_LANG1:
55 break;
56 case V4L2_TUNER_MODE_STEREO:
57 case V4L2_TUNER_MODE_LANG1_LANG2:
58 data[1] = 0x01;
59 break;
60 case V4L2_TUNER_MODE_LANG2:
61 data[1] = 0x02;
62 break;
Hans Verkuilac247432007-07-27 06:56:50 -030063 }
64
Hans Verkuil35df38c2007-12-12 07:40:54 -030065 if (i2c_master_send(client, data, sizeof(data)) != sizeof(data))
66 v4l_err(client, "%s: I/O error setting audmode\n",
67 client->name);
68 else
Hans Verkuilac247432007-07-27 06:56:50 -030069 state->audmode = audmode;
Hans Verkuilac247432007-07-27 06:56:50 -030070}
71
Hans Verkuil35df38c2007-12-12 07:40:54 -030072static int vp27smpx_command(struct i2c_client *client, unsigned cmd, void *arg)
Hans Verkuilac247432007-07-27 06:56:50 -030073{
74 struct vp27smpx_state *state = i2c_get_clientdata(client);
75 struct v4l2_tuner *vt = arg;
76
77 switch (cmd) {
78 case AUDC_SET_RADIO:
79 state->radio = 1;
80 break;
81
82 case VIDIOC_S_STD:
83 state->radio = 0;
84 break;
85
86 case VIDIOC_S_TUNER:
87 if (!state->radio)
88 vp27smpx_set_audmode(client, vt->audmode);
89 break;
90
91 case VIDIOC_G_TUNER:
92 if (state->radio)
93 break;
94 vt->audmode = state->audmode;
95 vt->capability = V4L2_TUNER_CAP_STEREO |
96 V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
97 vt->rxsubchans = V4L2_TUNER_SUB_MONO;
98 break;
99
100 case VIDIOC_G_CHIP_IDENT:
Hans Verkuil35df38c2007-12-12 07:40:54 -0300101 return v4l2_chip_ident_i2c_client(client, arg,
102 V4L2_IDENT_VP27SMPX, 0);
Hans Verkuilac247432007-07-27 06:56:50 -0300103
104 case VIDIOC_LOG_STATUS:
105 v4l_info(client, "Audio Mode: %u%s\n", state->audmode,
106 state->radio ? " (Radio)" : "");
107 break;
108
109 default:
110 return -EINVAL;
111 }
112 return 0;
113}
114
115/* ----------------------------------------------------------------------- */
116
117/* i2c implementation */
118
119/*
120 * Generic i2c probe
121 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
122 */
123
Jean Delvared2653e92008-04-29 23:11:39 +0200124static int vp27smpx_probe(struct i2c_client *client,
125 const struct i2c_device_id *id)
Hans Verkuilac247432007-07-27 06:56:50 -0300126{
Hans Verkuilac247432007-07-27 06:56:50 -0300127 struct vp27smpx_state *state;
128
129 /* Check if the adapter supports the needed features */
Hans Verkuil45eea272007-09-13 11:11:44 -0300130 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Hans Verkuil188f3452007-09-16 10:47:15 -0300131 return -EIO;
Hans Verkuilac247432007-07-27 06:56:50 -0300132
Hans Verkuil35df38c2007-12-12 07:40:54 -0300133 v4l_info(client, "chip found @ 0x%x (%s)\n",
134 client->addr << 1, client->adapter->name);
Hans Verkuilac247432007-07-27 06:56:50 -0300135
136 state = kzalloc(sizeof(struct vp27smpx_state), GFP_KERNEL);
Hans Verkuil35df38c2007-12-12 07:40:54 -0300137 if (state == NULL)
Hans Verkuilac247432007-07-27 06:56:50 -0300138 return -ENOMEM;
Hans Verkuilac247432007-07-27 06:56:50 -0300139 state->audmode = V4L2_TUNER_MODE_STEREO;
140 i2c_set_clientdata(client, state);
141
142 /* initialize vp27smpx */
143 vp27smpx_set_audmode(client, state->audmode);
Hans Verkuilac247432007-07-27 06:56:50 -0300144 return 0;
145}
146
Hans Verkuil45eea272007-09-13 11:11:44 -0300147static int vp27smpx_remove(struct i2c_client *client)
Hans Verkuilac247432007-07-27 06:56:50 -0300148{
Hans Verkuil45eea272007-09-13 11:11:44 -0300149 kfree(i2c_get_clientdata(client));
Hans Verkuilac247432007-07-27 06:56:50 -0300150 return 0;
151}
152
153/* ----------------------------------------------------------------------- */
154
Jean Delvareaf294862008-05-18 20:49:40 +0200155static const struct i2c_device_id vp27smpx_id[] = {
156 { "vp27smpx", 0 },
157 { }
158};
159MODULE_DEVICE_TABLE(i2c, vp27smpx_id);
160
Hans Verkuil45eea272007-09-13 11:11:44 -0300161static struct v4l2_i2c_driver_data v4l2_i2c_data = {
162 .name = "vp27smpx",
163 .driverid = I2C_DRIVERID_VP27SMPX,
164 .command = vp27smpx_command,
165 .probe = vp27smpx_probe,
166 .remove = vp27smpx_remove,
Jean Delvareaf294862008-05-18 20:49:40 +0200167 .id_table = vp27smpx_id,
Hans Verkuilac247432007-07-27 06:56:50 -0300168};