1 /*
2 * vp27smpx - driver version 0.0.1
3 *
4 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
5 *
6 * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com>
7 * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp>
8 *
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>
30 #include <linux/videodev2.h>
31 #include <media/v4l2-device.h>
32 #include <media/v4l2-chip-ident.h>
33 #include <media/v4l2-i2c-drv.h>
34
35 MODULE_DESCRIPTION("vp27smpx driver");
36 MODULE_AUTHOR("Hans Verkuil");
37 MODULE_LICENSE("GPL");
38
39
40 /* ----------------------------------------------------------------------- */
41
42 struct vp27smpx_state {
43 struct v4l2_subdev sd;
44 int radio;
45 u32 audmode;
46 };
47
48 static inline struct vp27smpx_state *to_state(struct v4l2_subdev *sd)
49 {
50 return container_of(sd, struct vp27smpx_state, sd);
51 }
52
53 static void vp27smpx_set_audmode(struct v4l2_subdev *sd, u32 audmode)
54 {
55 struct vp27smpx_state *state = to_state(sd);
56 struct i2c_client *client = v4l2_get_subdevdata(sd);
57 u8 data[3] = { 0x00, 0x00, 0x04 };
58
59 switch (audmode) {
60 case V4L2_TUNER_MODE_MONO:
61 case V4L2_TUNER_MODE_LANG1:
62 break;
63 case V4L2_TUNER_MODE_STEREO:
64 case V4L2_TUNER_MODE_LANG1_LANG2:
65 data[1] = 0x01;
66 break;
67 case V4L2_TUNER_MODE_LANG2:
68 data[1] = 0x02;
69 break;
70 }
71
72 if (i2c_master_send(client, data, sizeof(data)) != sizeof(data))
73 v4l2_err(sd, "I/O error setting audmode\n");
74 else
75 state->audmode = audmode;
76 }
77
78 static int vp27smpx_s_radio(struct v4l2_subdev *sd)
79 {
80 struct vp27smpx_state *state = to_state(sd);
81
82 state->radio = 1;
83 return 0;
84 }
85
86 static int vp27smpx_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
87 {
88 struct vp27smpx_state *state = to_state(sd);
89
90 state->radio = 0;
91 return 0;
92 }
93
94 static int vp27smpx_s_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
95 {
96 struct vp27smpx_state *state = to_state(sd);
97
98 if (!state->radio)
99 vp27smpx_set_audmode(sd, vt->audmode);
100 return 0;
101 }
102
103 static int vp27smpx_g_tuner(struct v4l2_subdev *sd, struct v4l2_tuner *vt)
104 {
105 struct vp27smpx_state *state = to_state(sd);
106
107 if (state->radio)
108 return 0;
109 vt->audmode = state->audmode;
110 vt->capability = V4L2_TUNER_CAP_STEREO |
111 V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2;
112 vt->rxsubchans = V4L2_TUNER_SUB_MONO;
113 return 0;
114 }
115
116 static int vp27smpx_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
117 {
118 struct i2c_client *client = v4l2_get_subdevdata(sd);
119
120 return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_VP27SMPX, 0);
121 }
122
123 static int vp27smpx_log_status(struct v4l2_subdev *sd)
124 {
125 struct vp27smpx_state *state = to_state(sd);
126
127 v4l2_info(sd, "Audio Mode: %u%s\n", state->audmode,
128 state->radio ? " (Radio)" : "");
129 return 0;
130 }
131
132 /* ----------------------------------------------------------------------- */
133
134 static const struct v4l2_subdev_core_ops vp27smpx_core_ops = {
135 .log_status = vp27smpx_log_status,
136 .g_chip_ident = vp27smpx_g_chip_ident,
137 .s_std = vp27smpx_s_std,
138 };
139
140 static const struct v4l2_subdev_tuner_ops vp27smpx_tuner_ops = {
141 .s_radio = vp27smpx_s_radio,
142 .s_tuner = vp27smpx_s_tuner,
143 .g_tuner = vp27smpx_g_tuner,
144 };
145
146 static const struct v4l2_subdev_ops vp27smpx_ops = {
147 .core = &vp27smpx_core_ops,
148 .tuner = &vp27smpx_tuner_ops,
149 };
150
151 /* ----------------------------------------------------------------------- */
152
153 /* i2c implementation */
154
155 /*
156 * Generic i2c probe
157 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
158 */
159
160 static int vp27smpx_probe(struct i2c_client *client,
161 const struct i2c_device_id *id)
162 {
163 struct vp27smpx_state *state;
164 struct v4l2_subdev *sd;
165
166 /* Check if the adapter supports the needed features */
167 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
168 return -EIO;
169
170 v4l_info(client, "chip found @ 0x%x (%s)\n",
171 client->addr << 1, client->adapter->name);
172
173 state = kzalloc(sizeof(struct vp27smpx_state), GFP_KERNEL);
174 if (state == NULL)
175 return -ENOMEM;
176 sd = &state->sd;
177 v4l2_i2c_subdev_init(sd, client, &vp27smpx_ops);
178 state->audmode = V4L2_TUNER_MODE_STEREO;
179
180 /* initialize vp27smpx */
181 vp27smpx_set_audmode(sd, state->audmode);
182 return 0;
183 }
184
185 static int vp27smpx_remove(struct i2c_client *client)
186 {
187 struct v4l2_subdev *sd = i2c_get_clientdata(client);
188
189 v4l2_device_unregister_subdev(sd);
190 kfree(to_state(sd));
191 return 0;
192 }
193
194 /* ----------------------------------------------------------------------- */
195
196 static const struct i2c_device_id vp27smpx_id[] = {
197 { "vp27smpx", 0 },
198 { }
199 };
200 MODULE_DEVICE_TABLE(i2c, vp27smpx_id);
201
202 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
203 .name = "vp27smpx",
204 .probe = vp27smpx_probe,
205 .remove = vp27smpx_remove,
206 .id_table = vp27smpx_id,
207 };
208
|
This page was automatically generated by the
LXR engine.
|