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6fb377f8 HV |
1 | /* |
2 | * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC | |
3 | * Copyright (C) 2007 Hans Verkuil | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
20 | ||
21 | #include <linux/version.h> | |
22 | #include <linux/module.h> | |
23 | #include <linux/kernel.h> | |
24 | #include <linux/i2c.h> | |
25 | #include <linux/videodev2.h> | |
26 | #include <media/v4l2-i2c-drv.h> | |
27 | #include <media/v4l2-common.h> | |
28 | #include <media/v4l2-chip-ident.h> | |
29 | ||
30 | MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); | |
31 | MODULE_AUTHOR("Hans Verkuil"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | static int debug; | |
35 | ||
36 | module_param(debug, bool, 0644); | |
37 | ||
38 | MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On"); | |
39 | ||
40 | ||
41 | /* ----------------------------------------------------------------------- */ | |
42 | ||
43 | static inline int cs5345_write(struct i2c_client *client, u8 reg, u8 value) | |
44 | { | |
45 | return i2c_smbus_write_byte_data(client, reg, value); | |
46 | } | |
47 | ||
48 | static inline int cs5345_read(struct i2c_client *client, u8 reg) | |
49 | { | |
50 | return i2c_smbus_read_byte_data(client, reg); | |
51 | } | |
52 | ||
53 | static int cs5345_command(struct i2c_client *client, unsigned cmd, void *arg) | |
54 | { | |
55 | struct v4l2_routing *route = arg; | |
56 | struct v4l2_control *ctrl = arg; | |
57 | ||
58 | switch (cmd) { | |
59 | case VIDIOC_INT_G_AUDIO_ROUTING: | |
60 | route->input = cs5345_read(client, 0x09) & 7; | |
61 | route->input |= cs5345_read(client, 0x05) & 0x70; | |
62 | route->output = 0; | |
63 | break; | |
64 | ||
65 | case VIDIOC_INT_S_AUDIO_ROUTING: | |
66 | if ((route->input & 0xf) > 6) { | |
67 | v4l_err(client, "Invalid input %d.\n", route->input); | |
68 | return -EINVAL; | |
69 | } | |
70 | cs5345_write(client, 0x09, route->input & 0xf); | |
71 | cs5345_write(client, 0x05, route->input & 0xf0); | |
72 | break; | |
73 | ||
74 | case VIDIOC_G_CTRL: | |
75 | if (ctrl->id == V4L2_CID_AUDIO_MUTE) { | |
76 | ctrl->value = (cs5345_read(client, 0x04) & 0x08) != 0; | |
77 | break; | |
78 | } | |
79 | if (ctrl->id != V4L2_CID_AUDIO_VOLUME) | |
80 | return -EINVAL; | |
81 | ctrl->value = cs5345_read(client, 0x07) & 0x3f; | |
82 | if (ctrl->value >= 32) | |
83 | ctrl->value = ctrl->value - 64; | |
84 | break; | |
85 | ||
86 | case VIDIOC_S_CTRL: | |
87 | break; | |
88 | if (ctrl->id == V4L2_CID_AUDIO_MUTE) { | |
89 | cs5345_write(client, 0x04, ctrl->value ? 0x80 : 0); | |
90 | break; | |
91 | } | |
92 | if (ctrl->id != V4L2_CID_AUDIO_VOLUME) | |
93 | return -EINVAL; | |
94 | if (ctrl->value > 24 || ctrl->value < -24) | |
95 | return -EINVAL; | |
96 | cs5345_write(client, 0x07, ((u8)ctrl->value) & 0x3f); | |
97 | cs5345_write(client, 0x08, ((u8)ctrl->value) & 0x3f); | |
98 | break; | |
99 | ||
100 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
101 | case VIDIOC_DBG_G_REGISTER: | |
102 | case VIDIOC_DBG_S_REGISTER: | |
103 | { | |
104 | struct v4l2_register *reg = arg; | |
105 | ||
106 | if (!v4l2_chip_match_i2c_client(client, | |
107 | reg->match_type, reg->match_chip)) | |
108 | return -EINVAL; | |
109 | if (!capable(CAP_SYS_ADMIN)) | |
110 | return -EPERM; | |
111 | if (cmd == VIDIOC_DBG_G_REGISTER) | |
112 | reg->val = cs5345_read(client, reg->reg & 0x1f); | |
113 | else | |
114 | cs5345_write(client, reg->reg & 0x1f, reg->val & 0x1f); | |
115 | break; | |
116 | } | |
117 | #endif | |
118 | ||
119 | case VIDIOC_G_CHIP_IDENT: | |
120 | return v4l2_chip_ident_i2c_client(client, | |
121 | arg, V4L2_IDENT_CS5345, 0); | |
122 | ||
123 | case VIDIOC_LOG_STATUS: | |
124 | { | |
125 | u8 v = cs5345_read(client, 0x09) & 7; | |
126 | u8 m = cs5345_read(client, 0x04); | |
127 | int vol = cs5345_read(client, 0x08) & 0x3f; | |
128 | ||
129 | v4l_info(client, "Input: %d%s\n", v, | |
130 | (m & 0x80) ? " (muted)" : ""); | |
131 | if (vol >= 32) | |
132 | vol = vol - 64; | |
133 | v4l_info(client, "Volume: %d dB\n", vol); | |
134 | break; | |
135 | } | |
136 | ||
137 | default: | |
138 | return -EINVAL; | |
139 | } | |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* ----------------------------------------------------------------------- */ | |
144 | ||
145 | static int cs5345_probe(struct i2c_client *client) | |
146 | { | |
147 | /* Check if the adapter supports the needed features */ | |
148 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
149 | return -EIO; | |
150 | ||
151 | v4l_info(client, "chip found @ 0x%x (%s)\n", | |
152 | client->addr << 1, client->adapter->name); | |
153 | ||
154 | cs5345_write(client, 0x02, 0x00); | |
155 | cs5345_write(client, 0x04, 0x01); | |
156 | cs5345_write(client, 0x09, 0x01); | |
157 | return 0; | |
158 | } | |
159 | ||
160 | /* ----------------------------------------------------------------------- */ | |
161 | ||
162 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { | |
163 | .name = "cs5345", | |
164 | .driverid = I2C_DRIVERID_CS5345, | |
165 | .command = cs5345_command, | |
166 | .probe = cs5345_probe, | |
167 | }; | |
168 |