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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 | ||
6fb377f8 HV |
21 | #include <linux/module.h> |
22 | #include <linux/kernel.h> | |
23 | #include <linux/i2c.h> | |
24 | #include <linux/videodev2.h> | |
5a0e3ad6 | 25 | #include <linux/slab.h> |
b3ee7e21 | 26 | #include <media/v4l2-device.h> |
6fb377f8 | 27 | #include <media/v4l2-chip-ident.h> |
b3ee7e21 | 28 | #include <media/v4l2-i2c-drv.h> |
6fb377f8 HV |
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 | ||
61a2d07d | 38 | MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); |
6fb377f8 HV |
39 | |
40 | ||
41 | /* ----------------------------------------------------------------------- */ | |
42 | ||
b3ee7e21 | 43 | static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
6fb377f8 | 44 | { |
b3ee7e21 HV |
45 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
46 | ||
6fb377f8 HV |
47 | return i2c_smbus_write_byte_data(client, reg, value); |
48 | } | |
49 | ||
b3ee7e21 | 50 | static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) |
6fb377f8 | 51 | { |
b3ee7e21 HV |
52 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
53 | ||
6fb377f8 HV |
54 | return i2c_smbus_read_byte_data(client, reg); |
55 | } | |
56 | ||
5325b427 HV |
57 | static int cs5345_s_routing(struct v4l2_subdev *sd, |
58 | u32 input, u32 output, u32 config) | |
6fb377f8 | 59 | { |
5325b427 HV |
60 | if ((input & 0xf) > 6) { |
61 | v4l2_err(sd, "Invalid input %d.\n", input); | |
b3ee7e21 | 62 | return -EINVAL; |
6fb377f8 | 63 | } |
5325b427 HV |
64 | cs5345_write(sd, 0x09, input & 0xf); |
65 | cs5345_write(sd, 0x05, input & 0xf0); | |
b3ee7e21 HV |
66 | return 0; |
67 | } | |
6fb377f8 | 68 | |
b3ee7e21 HV |
69 | static int cs5345_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
70 | { | |
71 | if (ctrl->id == V4L2_CID_AUDIO_MUTE) { | |
72 | ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0; | |
73 | return 0; | |
74 | } | |
75 | if (ctrl->id != V4L2_CID_AUDIO_VOLUME) | |
6fb377f8 | 76 | return -EINVAL; |
b3ee7e21 HV |
77 | ctrl->value = cs5345_read(sd, 0x07) & 0x3f; |
78 | if (ctrl->value >= 32) | |
79 | ctrl->value = ctrl->value - 64; | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int cs5345_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | |
84 | { | |
85 | if (ctrl->id == V4L2_CID_AUDIO_MUTE) { | |
86 | cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0); | |
87 | return 0; | |
6fb377f8 | 88 | } |
b3ee7e21 HV |
89 | if (ctrl->id != V4L2_CID_AUDIO_VOLUME) |
90 | return -EINVAL; | |
91 | if (ctrl->value > 24 || ctrl->value < -24) | |
92 | return -EINVAL; | |
93 | cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f); | |
94 | cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f); | |
95 | return 0; | |
96 | } | |
97 | ||
98 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
aecde8b5 | 99 | static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
b3ee7e21 HV |
100 | { |
101 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
102 | ||
aecde8b5 | 103 | if (!v4l2_chip_match_i2c_client(client, ®->match)) |
b3ee7e21 HV |
104 | return -EINVAL; |
105 | if (!capable(CAP_SYS_ADMIN)) | |
106 | return -EPERM; | |
aecde8b5 | 107 | reg->size = 1; |
b3ee7e21 HV |
108 | reg->val = cs5345_read(sd, reg->reg & 0x1f); |
109 | return 0; | |
110 | } | |
111 | ||
aecde8b5 | 112 | static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
b3ee7e21 HV |
113 | { |
114 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
115 | ||
aecde8b5 | 116 | if (!v4l2_chip_match_i2c_client(client, ®->match)) |
b3ee7e21 HV |
117 | return -EINVAL; |
118 | if (!capable(CAP_SYS_ADMIN)) | |
119 | return -EPERM; | |
120 | cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); | |
6fb377f8 HV |
121 | return 0; |
122 | } | |
b3ee7e21 HV |
123 | #endif |
124 | ||
aecde8b5 | 125 | static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) |
b3ee7e21 HV |
126 | { |
127 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
128 | ||
129 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0); | |
130 | } | |
131 | ||
132 | static int cs5345_log_status(struct v4l2_subdev *sd) | |
133 | { | |
134 | u8 v = cs5345_read(sd, 0x09) & 7; | |
135 | u8 m = cs5345_read(sd, 0x04); | |
136 | int vol = cs5345_read(sd, 0x08) & 0x3f; | |
137 | ||
138 | v4l2_info(sd, "Input: %d%s\n", v, | |
139 | (m & 0x80) ? " (muted)" : ""); | |
140 | if (vol >= 32) | |
141 | vol = vol - 64; | |
142 | v4l2_info(sd, "Volume: %d dB\n", vol); | |
143 | return 0; | |
144 | } | |
145 | ||
b3ee7e21 HV |
146 | /* ----------------------------------------------------------------------- */ |
147 | ||
148 | static const struct v4l2_subdev_core_ops cs5345_core_ops = { | |
149 | .log_status = cs5345_log_status, | |
150 | .g_chip_ident = cs5345_g_chip_ident, | |
151 | .g_ctrl = cs5345_g_ctrl, | |
152 | .s_ctrl = cs5345_s_ctrl, | |
153 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
154 | .g_register = cs5345_g_register, | |
155 | .s_register = cs5345_s_register, | |
156 | #endif | |
157 | }; | |
158 | ||
159 | static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { | |
160 | .s_routing = cs5345_s_routing, | |
161 | }; | |
162 | ||
163 | static const struct v4l2_subdev_ops cs5345_ops = { | |
164 | .core = &cs5345_core_ops, | |
165 | .audio = &cs5345_audio_ops, | |
166 | }; | |
6fb377f8 HV |
167 | |
168 | /* ----------------------------------------------------------------------- */ | |
169 | ||
d2653e92 JD |
170 | static int cs5345_probe(struct i2c_client *client, |
171 | const struct i2c_device_id *id) | |
6fb377f8 | 172 | { |
b3ee7e21 HV |
173 | struct v4l2_subdev *sd; |
174 | ||
6fb377f8 HV |
175 | /* Check if the adapter supports the needed features */ |
176 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
177 | return -EIO; | |
178 | ||
179 | v4l_info(client, "chip found @ 0x%x (%s)\n", | |
180 | client->addr << 1, client->adapter->name); | |
181 | ||
b3ee7e21 HV |
182 | sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); |
183 | if (sd == NULL) | |
184 | return -ENOMEM; | |
185 | v4l2_i2c_subdev_init(sd, client, &cs5345_ops); | |
186 | ||
187 | cs5345_write(sd, 0x02, 0x00); | |
188 | cs5345_write(sd, 0x04, 0x01); | |
189 | cs5345_write(sd, 0x09, 0x01); | |
190 | return 0; | |
191 | } | |
192 | ||
193 | /* ----------------------------------------------------------------------- */ | |
194 | ||
195 | static int cs5345_remove(struct i2c_client *client) | |
196 | { | |
197 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
198 | ||
199 | v4l2_device_unregister_subdev(sd); | |
200 | kfree(sd); | |
6fb377f8 HV |
201 | return 0; |
202 | } | |
203 | ||
204 | /* ----------------------------------------------------------------------- */ | |
205 | ||
af294867 JD |
206 | static const struct i2c_device_id cs5345_id[] = { |
207 | { "cs5345", 0 }, | |
208 | { } | |
209 | }; | |
210 | MODULE_DEVICE_TABLE(i2c, cs5345_id); | |
211 | ||
6fb377f8 HV |
212 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
213 | .name = "cs5345", | |
6fb377f8 | 214 | .probe = cs5345_probe, |
b3ee7e21 | 215 | .remove = cs5345_remove, |
af294867 | 216 | .id_table = cs5345_id, |
6fb377f8 | 217 | }; |