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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 | * | |
be848fe3 | 6 | * Based on a tvaudio patch from Kazuhiko Kawakami <kazz-0@mail.goo.ne.jp> |
ac247433 HV |
7 | * |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
21 | */ | |
22 | ||
23 | #include <linux/module.h> | |
24 | #include <linux/types.h> | |
25 | #include <linux/ioctl.h> | |
26 | #include <asm/uaccess.h> | |
27 | #include <linux/i2c.h> | |
28 | #include <linux/i2c-id.h> | |
29 | #include <linux/videodev.h> | |
30 | #include <media/v4l2-common.h> | |
31 | #include <media/v4l2-chip-ident.h> | |
32 | ||
33 | MODULE_DESCRIPTION("vp27smpx driver"); | |
34 | MODULE_AUTHOR("Hans Verkuil"); | |
35 | MODULE_LICENSE("GPL"); | |
36 | ||
37 | static unsigned short normal_i2c[] = { 0xb6 >> 1, I2C_CLIENT_END }; | |
38 | ||
39 | ||
40 | I2C_CLIENT_INSMOD; | |
41 | ||
42 | /* ----------------------------------------------------------------------- */ | |
43 | ||
44 | struct vp27smpx_state { | |
45 | int radio; | |
46 | u32 audmode; | |
47 | }; | |
48 | ||
49 | static void vp27smpx_set_audmode(struct i2c_client *client, u32 audmode) | |
50 | { | |
51 | struct vp27smpx_state *state = i2c_get_clientdata(client); | |
52 | u8 data[3] = { 0x00, 0x00, 0x04 }; | |
53 | ||
54 | switch (audmode) { | |
55 | case V4L2_TUNER_MODE_MONO: | |
56 | case V4L2_TUNER_MODE_LANG1: | |
57 | break; | |
58 | case V4L2_TUNER_MODE_STEREO: | |
59 | case V4L2_TUNER_MODE_LANG1_LANG2: | |
60 | data[1] = 0x01; | |
61 | break; | |
62 | case V4L2_TUNER_MODE_LANG2: | |
63 | data[1] = 0x02; | |
64 | break; | |
65 | } | |
66 | ||
67 | if (i2c_master_send(client, data, sizeof(data)) != sizeof(data)) { | |
68 | v4l_err(client, "%s: I/O error setting audmode\n", client->name); | |
69 | } | |
70 | else { | |
71 | state->audmode = audmode; | |
72 | } | |
73 | } | |
74 | ||
75 | static int vp27smpx_command(struct i2c_client *client, unsigned int cmd, | |
76 | void *arg) | |
77 | { | |
78 | struct vp27smpx_state *state = i2c_get_clientdata(client); | |
79 | struct v4l2_tuner *vt = arg; | |
80 | ||
81 | switch (cmd) { | |
82 | case AUDC_SET_RADIO: | |
83 | state->radio = 1; | |
84 | break; | |
85 | ||
86 | case VIDIOC_S_STD: | |
87 | state->radio = 0; | |
88 | break; | |
89 | ||
90 | case VIDIOC_S_TUNER: | |
91 | if (!state->radio) | |
92 | vp27smpx_set_audmode(client, vt->audmode); | |
93 | break; | |
94 | ||
95 | case VIDIOC_G_TUNER: | |
96 | if (state->radio) | |
97 | break; | |
98 | vt->audmode = state->audmode; | |
99 | vt->capability = V4L2_TUNER_CAP_STEREO | | |
100 | V4L2_TUNER_CAP_LANG1 | V4L2_TUNER_CAP_LANG2; | |
101 | vt->rxsubchans = V4L2_TUNER_SUB_MONO; | |
102 | break; | |
103 | ||
104 | case VIDIOC_G_CHIP_IDENT: | |
105 | return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_VP27SMPX, 0); | |
106 | ||
107 | case VIDIOC_LOG_STATUS: | |
108 | v4l_info(client, "Audio Mode: %u%s\n", state->audmode, | |
109 | state->radio ? " (Radio)" : ""); | |
110 | break; | |
111 | ||
112 | default: | |
113 | return -EINVAL; | |
114 | } | |
115 | return 0; | |
116 | } | |
117 | ||
118 | /* ----------------------------------------------------------------------- */ | |
119 | ||
120 | /* i2c implementation */ | |
121 | ||
122 | /* | |
123 | * Generic i2c probe | |
124 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
125 | */ | |
126 | ||
127 | static struct i2c_driver i2c_driver; | |
128 | ||
129 | static int vp27smpx_attach(struct i2c_adapter *adapter, int address, int kind) | |
130 | { | |
131 | struct i2c_client *client; | |
132 | struct vp27smpx_state *state; | |
133 | ||
134 | /* Check if the adapter supports the needed features */ | |
135 | if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
136 | return 0; | |
137 | ||
138 | client = kzalloc(sizeof(struct i2c_client), GFP_KERNEL); | |
139 | if (client == 0) | |
140 | return -ENOMEM; | |
141 | ||
142 | client->addr = address; | |
143 | client->adapter = adapter; | |
144 | client->driver = &i2c_driver; | |
145 | snprintf(client->name, sizeof(client->name) - 1, "vp27smpx"); | |
146 | ||
147 | v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name); | |
148 | ||
149 | state = kzalloc(sizeof(struct vp27smpx_state), GFP_KERNEL); | |
150 | if (state == NULL) { | |
151 | kfree(client); | |
152 | return -ENOMEM; | |
153 | } | |
154 | state->audmode = V4L2_TUNER_MODE_STEREO; | |
155 | i2c_set_clientdata(client, state); | |
156 | ||
157 | /* initialize vp27smpx */ | |
158 | vp27smpx_set_audmode(client, state->audmode); | |
159 | i2c_attach_client(client); | |
160 | ||
161 | return 0; | |
162 | } | |
163 | ||
164 | static int vp27smpx_probe(struct i2c_adapter *adapter) | |
165 | { | |
166 | if (adapter->class & I2C_CLASS_TV_ANALOG) | |
167 | return i2c_probe(adapter, &addr_data, vp27smpx_attach); | |
168 | return 0; | |
169 | } | |
170 | ||
171 | static int vp27smpx_detach(struct i2c_client *client) | |
172 | { | |
173 | struct vp27smpx_state *state = i2c_get_clientdata(client); | |
174 | int err; | |
175 | ||
176 | err = i2c_detach_client(client); | |
177 | if (err) { | |
178 | return err; | |
179 | } | |
180 | kfree(state); | |
181 | kfree(client); | |
182 | ||
183 | return 0; | |
184 | } | |
185 | ||
186 | /* ----------------------------------------------------------------------- */ | |
187 | ||
188 | /* i2c implementation */ | |
189 | static struct i2c_driver i2c_driver = { | |
190 | .driver = { | |
191 | .name = "vp27smpx", | |
192 | }, | |
193 | .id = I2C_DRIVERID_VP27SMPX, | |
194 | .attach_adapter = vp27smpx_probe, | |
195 | .detach_client = vp27smpx_detach, | |
196 | .command = vp27smpx_command, | |
197 | }; | |
198 | ||
199 | ||
200 | static int __init vp27smpx_init_module(void) | |
201 | { | |
202 | return i2c_add_driver(&i2c_driver); | |
203 | } | |
204 | ||
205 | static void __exit vp27smpx_cleanup_module(void) | |
206 | { | |
207 | i2c_del_driver(&i2c_driver); | |
208 | } | |
209 | ||
210 | module_init(vp27smpx_init_module); | |
211 | module_exit(vp27smpx_cleanup_module); |