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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>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Hans Verkuilac247432007-07-27 06:56:50 -030027#include <linux/ioctl.h>
28#include <asm/uaccess.h>
29#include <linux/i2c.h>
Hans Verkuil33b687c2008-07-25 05:32:50 -030030#include <linux/videodev2.h>
Hans Verkuild9460f02008-11-29 13:01:28 -030031#include <media/v4l2-device.h>
Hans Verkuilac247432007-07-27 06:56:50 -030032
33MODULE_DESCRIPTION("vp27smpx driver");
34MODULE_AUTHOR("Hans Verkuil");
35MODULE_LICENSE("GPL");
36
Hans Verkuilac247432007-07-27 06:56:50 -030037
38/* ----------------------------------------------------------------------- */
39
40struct vp27smpx_state {
Hans Verkuild9460f02008-11-29 13:01:28 -030041 struct v4l2_subdev sd;
Hans Verkuilac247432007-07-27 06:56:50 -030042 int radio;
43 u32 audmode;
44};
45
Hans Verkuild9460f02008-11-29 13:01:28 -030046static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd)
Hans Verkuilac247432007-07-27 06:56:50 -030047{
Hans Verkuild9460f02008-11-29 13:01:28 -030048 return container_of(sd, struct vp27smpx_state, sd);
49}
50
51static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode)
52{
53 struct vp27smpx_state *state = to_state(sd);
54 struct i2c_client *client = v4l2_get_subdevdata(sd);
Hans Verkuilac247432007-07-27 06:56:50 -030055 u8 data[3] = { 0x00, 0x00, 0x04 };
56
57 switch (audmode) {
Hans Verkuil35df38c2007-12-12 07:40:54 -030058 case V4L2_TUNER_MODE_MONO:
59 case V4L2_TUNER_MODE_LANG1:
60 break;
61 case V4L2_TUNER_MODE_STEREO:
62 case V4L2_TUNER_MODE_LANG1_LANG2:
63 data[1] = 0x01;
64 break;
65 case V4L2_TUNER_MODE_LANG2:
66 data[1] = 0x02;
67 break;
Hans Verkuilac247432007-07-27 06:56:50 -030068 }
69
Hans Verkuil35df38c2007-12-12 07:40:54 -030070 if (i2c_master_send(client, data, sizeof(data)) != sizeof(data))
Hans Verkuild9460f02008-11-29 13:01:28 -030071 v4l2_err(sd, "I/O error setting audmode\n");
Hans Verkuil35df38c2007-12-12 07:40:54 -030072 else
Hans Verkuilac247432007-07-27 06:56:50 -030073 state->audmode = audmode;
Hans Verkuilac247432007-07-27 06:56:50 -030074}
75
Hans Verkuild9460f02008-11-29 13:01:28 -030076static int vp27smpx_s_radio(struct v4l2_subdev *sd)
Hans Verkuilac247432007-07-27 06:56:50 -030077{
Hans Verkuild9460f02008-11-29 13:01:28 -030078 struct vp27smpx_state *state = to_state(sd);
Hans Verkuilac247432007-07-27 06:56:50 -030079
Hans Verkuild9460f02008-11-29 13:01:28 -030080 state->radio = 1;
Hans Verkuilac247432007-07-27 06:56:50 -030081 return 0;
82}
83
Hans Verkuild9460f02008-11-29 13:01:28 -030084static int vp27smpx_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
85{
86 struct vp27smpx_state *state = to_state(sd);
87
88 state->radio = 0;
89 return 0;
90}
91
Hans Verkuil2f73c7c2013-03-15 06:10:06 -030092static int vp27smpx_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt)
Hans Verkuild9460f02008-11-29 13:01:28 -030093{
94 struct vp27smpx_state *state = to_state(sd);
95
96 if (!state->radio)
97 vp27smpx_set_audmode(sd, vt->audmode);
98 return 0;
99}
100
101static int vp27smpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
102{
103 struct vp27smpx_state *state = to_state(sd);
104
105 if (state->radio)
106 return 0;
107 vt->audmode = state->audmode;
108 vt->capability = V4L2_TUNER_CAP_STEREO |
109 V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
110 vt->rxsubchans = V4L2_TUNER_SUB_MONO;
111 return 0;
112}
113
Hans Verkuild9460f02008-11-29 13:01:28 -0300114static int vp27smpx_log_status(struct v4l2_subdev *sd)
115{
116 struct vp27smpx_state *state = to_state(sd);
117
118 v4l2_info(sd, "Audio Mode: %u%s\n", state->audmode,
119 state->radio ? " (Radio)" : "");
120 return 0;
121}
122
Hans Verkuild9460f02008-11-29 13:01:28 -0300123/* ----------------------------------------------------------------------- */
124
125static const struct v4l2_subdev_core_ops vp27smpx_core_ops = {
126 .log_status = vp27smpx_log_status,
Hans Verkuild9460f02008-11-29 13:01:28 -0300127};
128
129static const struct v4l2_subdev_tuner_ops vp27smpx_tuner_ops = {
130 .s_radio = vp27smpx_s_radio,
Hans Verkuild9460f02008-11-29 13:01:28 -0300131 .s_tuner = vp27smpx_s_tuner,
132 .g_tuner = vp27smpx_g_tuner,
133};
134
Laurent Pinchart8774bed2014-04-28 16:53:01 -0300135static const struct v4l2_subdev_video_ops vp27smpx_video_ops = {
136 .s_std = vp27smpx_s_std,
137};
138
Hans Verkuild9460f02008-11-29 13:01:28 -0300139static const struct v4l2_subdev_ops vp27smpx_ops = {
140 .core = &vp27smpx_core_ops,
141 .tuner = &vp27smpx_tuner_ops,
Laurent Pinchart8774bed2014-04-28 16:53:01 -0300142 .video = &vp27smpx_video_ops,
Hans Verkuild9460f02008-11-29 13:01:28 -0300143};
144
Hans Verkuilac247432007-07-27 06:56:50 -0300145/* ----------------------------------------------------------------------- */
146
147/* i2c implementation */
148
149/*
150 * Generic i2c probe
151 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
152 */
153
Jean Delvared2653e92008-04-29 23:11:39 +0200154static int vp27smpx_probe(struct i2c_client *client,
155 const struct i2c_device_id *id)
Hans Verkuilac247432007-07-27 06:56:50 -0300156{
Hans Verkuilac247432007-07-27 06:56:50 -0300157 struct vp27smpx_state *state;
Hans Verkuild9460f02008-11-29 13:01:28 -0300158 struct v4l2_subdev *sd;
Hans Verkuilac247432007-07-27 06:56:50 -0300159
160 /* Check if the adapter supports the needed features */
Hans Verkuil45eea272007-09-13 11:11:44 -0300161 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Hans Verkuil188f3452007-09-16 10:47:15 -0300162 return -EIO;
Hans Verkuilac247432007-07-27 06:56:50 -0300163
Hans Verkuil35df38c2007-12-12 07:40:54 -0300164 v4l_info(client, "chip found @ 0x%x (%s)\n",
165 client->addr << 1, client->adapter->name);
Hans Verkuilac247432007-07-27 06:56:50 -0300166
Laurent Pinchartc02b2112013-05-02 08:29:43 -0300167 state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
Hans Verkuil35df38c2007-12-12 07:40:54 -0300168 if (state == NULL)
Hans Verkuilac247432007-07-27 06:56:50 -0300169 return -ENOMEM;
Hans Verkuild9460f02008-11-29 13:01:28 -0300170 sd = &state->sd;
171 v4l2_i2c_subdev_init(sd, client, &vp27smpx_ops);
Hans Verkuilac247432007-07-27 06:56:50 -0300172 state->audmode = V4L2_TUNER_MODE_STEREO;
Hans Verkuilac247432007-07-27 06:56:50 -0300173
174 /* initialize vp27smpx */
Hans Verkuild9460f02008-11-29 13:01:28 -0300175 vp27smpx_set_audmode(sd, state->audmode);
Hans Verkuilac247432007-07-27 06:56:50 -0300176 return 0;
177}
178
Hans Verkuil45eea272007-09-13 11:11:44 -0300179static int vp27smpx_remove(struct i2c_client *client)
Hans Verkuilac247432007-07-27 06:56:50 -0300180{
Hans Verkuild9460f02008-11-29 13:01:28 -0300181 struct v4l2_subdev *sd = i2c_get_clientdata(client);
182
183 v4l2_device_unregister_subdev(sd);
Hans Verkuilac247432007-07-27 06:56:50 -0300184 return 0;
185}
186
187/* ----------------------------------------------------------------------- */
188
Jean Delvareaf294862008-05-18 20:49:40 +0200189static const struct i2c_device_id vp27smpx_id[] = {
190 { "vp27smpx", 0 },
191 { }
192};
193MODULE_DEVICE_TABLE(i2c, vp27smpx_id);
194
Hans Verkuil1f352662010-09-15 14:56:12 -0300195static struct i2c_driver vp27smpx_driver = {
196 .driver = {
Hans Verkuil1f352662010-09-15 14:56:12 -0300197 .name = "vp27smpx",
198 },
199 .probe = vp27smpx_probe,
200 .remove = vp27smpx_remove,
201 .id_table = vp27smpx_id,
Hans Verkuilac247432007-07-27 06:56:50 -0300202};
Hans Verkuil1f352662010-09-15 14:56:12 -0300203
Axel Linc6e8d862012-02-12 06:56:32 -0300204module_i2c_driver(vp27smpx_driver);