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ac247433 HV |
1 | /* |
2 | * vp27smpx - driver version 0.0.1 | |
3 | * | |
4 | * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl> | |
5 | * | |
da80be21 KK |
6 | * Based on a tvaudio patch from Takahiro Adachi <tadachi@tadachi-net.com> |
7 | * and Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp> | |
ac247433 HV |
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/videodev.h> | |
31 | #include <media/v4l2-common.h> | |
32 | #include <media/v4l2-chip-ident.h> | |
f69d419a | 33 | #include <media/v4l2-i2c-drv.h> |
ac247433 HV |
34 | |
35 | MODULE_DESCRIPTION("vp27smpx driver"); | |
36 | MODULE_AUTHOR("Hans Verkuil"); | |
37 | MODULE_LICENSE("GPL"); | |
38 | ||
ac247433 HV |
39 | |
40 | /* ----------------------------------------------------------------------- */ | |
41 | ||
42 | struct vp27smpx_state { | |
43 | int radio; | |
44 | u32 audmode; | |
45 | }; | |
46 | ||
47 | static 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) { | |
35df38c0 HV |
53 | 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; | |
ac247433 HV |
63 | } |
64 | ||
35df38c0 HV |
65 | 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 | |
ac247433 | 69 | state->audmode = audmode; |
ac247433 HV |
70 | } |
71 | ||
35df38c0 | 72 | static int vp27smpx_command(struct i2c_client *client, unsigned cmd, void *arg) |
ac247433 HV |
73 | { |
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: | |
35df38c0 HV |
101 | return v4l2_chip_ident_i2c_client(client, arg, |
102 | V4L2_IDENT_VP27SMPX, 0); | |
ac247433 HV |
103 | |
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 | ||
d2653e92 JD |
124 | static int vp27smpx_probe(struct i2c_client *client, |
125 | const struct i2c_device_id *id) | |
ac247433 | 126 | { |
ac247433 HV |
127 | struct vp27smpx_state *state; |
128 | ||
129 | /* Check if the adapter supports the needed features */ | |
45eea276 | 130 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
188f3457 | 131 | return -EIO; |
ac247433 | 132 | |
35df38c0 HV |
133 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
134 | client->addr << 1, client->adapter->name); | |
ac247433 HV |
135 | |
136 | state = kzalloc(sizeof(struct vp27smpx_state), GFP_KERNEL); | |
35df38c0 | 137 | if (state == NULL) |
ac247433 | 138 | return -ENOMEM; |
ac247433 HV |
139 | state->audmode = V4L2_TUNER_MODE_STEREO; |
140 | i2c_set_clientdata(client, state); | |
141 | ||
142 | /* initialize vp27smpx */ | |
143 | vp27smpx_set_audmode(client, state->audmode); | |
ac247433 HV |
144 | return 0; |
145 | } | |
146 | ||
45eea276 | 147 | static int vp27smpx_remove(struct i2c_client *client) |
ac247433 | 148 | { |
45eea276 | 149 | kfree(i2c_get_clientdata(client)); |
ac247433 HV |
150 | return 0; |
151 | } | |
152 | ||
153 | /* ----------------------------------------------------------------------- */ | |
154 | ||
af294867 JD |
155 | static const struct i2c_device_id vp27smpx_id[] = { |
156 | { "vp27smpx", 0 }, | |
157 | { } | |
158 | }; | |
159 | MODULE_DEVICE_TABLE(i2c, vp27smpx_id); | |
160 | ||
45eea276 HV |
161 | static 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, | |
af294867 | 167 | .id_table = vp27smpx_id, |
ac247433 | 168 | }; |