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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 HV |
27 | #include <media/v4l2-chip-ident.h> |
28 | ||
29 | MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); | |
30 | MODULE_AUTHOR("Hans Verkuil"); | |
31 | MODULE_LICENSE("GPL"); | |
32 | ||
33 | static int debug; | |
34 | ||
35 | module_param(debug, bool, 0644); | |
36 | ||
61a2d07d | 37 | MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); |
6fb377f8 HV |
38 | |
39 | ||
40 | /* ----------------------------------------------------------------------- */ | |
41 | ||
b3ee7e21 | 42 | static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
6fb377f8 | 43 | { |
b3ee7e21 HV |
44 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
45 | ||
6fb377f8 HV |
46 | return i2c_smbus_write_byte_data(client, reg, value); |
47 | } | |
48 | ||
b3ee7e21 | 49 | static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) |
6fb377f8 | 50 | { |
b3ee7e21 HV |
51 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
52 | ||
6fb377f8 HV |
53 | return i2c_smbus_read_byte_data(client, reg); |
54 | } | |
55 | ||
5325b427 HV |
56 | static int cs5345_s_routing(struct v4l2_subdev *sd, |
57 | u32 input, u32 output, u32 config) | |
6fb377f8 | 58 | { |
5325b427 HV |
59 | if ((input & 0xf) > 6) { |
60 | v4l2_err(sd, "Invalid input %d.\n", input); | |
b3ee7e21 | 61 | return -EINVAL; |
6fb377f8 | 62 | } |
5325b427 HV |
63 | cs5345_write(sd, 0x09, input & 0xf); |
64 | cs5345_write(sd, 0x05, input & 0xf0); | |
b3ee7e21 HV |
65 | return 0; |
66 | } | |
6fb377f8 | 67 | |
b3ee7e21 HV |
68 | static int cs5345_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
69 | { | |
70 | if (ctrl->id == V4L2_CID_AUDIO_MUTE) { | |
71 | ctrl->value = (cs5345_read(sd, 0x04) & 0x08) != 0; | |
72 | return 0; | |
73 | } | |
74 | if (ctrl->id != V4L2_CID_AUDIO_VOLUME) | |
6fb377f8 | 75 | return -EINVAL; |
b3ee7e21 HV |
76 | ctrl->value = cs5345_read(sd, 0x07) & 0x3f; |
77 | if (ctrl->value >= 32) | |
78 | ctrl->value = ctrl->value - 64; | |
79 | return 0; | |
80 | } | |
81 | ||
82 | static int cs5345_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | |
83 | { | |
84 | if (ctrl->id == V4L2_CID_AUDIO_MUTE) { | |
85 | cs5345_write(sd, 0x04, ctrl->value ? 0x80 : 0); | |
86 | return 0; | |
6fb377f8 | 87 | } |
b3ee7e21 HV |
88 | if (ctrl->id != V4L2_CID_AUDIO_VOLUME) |
89 | return -EINVAL; | |
90 | if (ctrl->value > 24 || ctrl->value < -24) | |
91 | return -EINVAL; | |
92 | cs5345_write(sd, 0x07, ((u8)ctrl->value) & 0x3f); | |
93 | cs5345_write(sd, 0x08, ((u8)ctrl->value) & 0x3f); | |
94 | return 0; | |
95 | } | |
96 | ||
97 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
aecde8b5 | 98 | static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
b3ee7e21 HV |
99 | { |
100 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
101 | ||
aecde8b5 | 102 | if (!v4l2_chip_match_i2c_client(client, ®->match)) |
b3ee7e21 HV |
103 | return -EINVAL; |
104 | if (!capable(CAP_SYS_ADMIN)) | |
105 | return -EPERM; | |
aecde8b5 | 106 | reg->size = 1; |
b3ee7e21 HV |
107 | reg->val = cs5345_read(sd, reg->reg & 0x1f); |
108 | return 0; | |
109 | } | |
110 | ||
aecde8b5 | 111 | static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) |
b3ee7e21 HV |
112 | { |
113 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
114 | ||
aecde8b5 | 115 | if (!v4l2_chip_match_i2c_client(client, ®->match)) |
b3ee7e21 HV |
116 | return -EINVAL; |
117 | if (!capable(CAP_SYS_ADMIN)) | |
118 | return -EPERM; | |
119 | cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); | |
6fb377f8 HV |
120 | return 0; |
121 | } | |
b3ee7e21 HV |
122 | #endif |
123 | ||
aecde8b5 | 124 | static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) |
b3ee7e21 HV |
125 | { |
126 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
127 | ||
128 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0); | |
129 | } | |
130 | ||
131 | static int cs5345_log_status(struct v4l2_subdev *sd) | |
132 | { | |
133 | u8 v = cs5345_read(sd, 0x09) & 7; | |
134 | u8 m = cs5345_read(sd, 0x04); | |
135 | int vol = cs5345_read(sd, 0x08) & 0x3f; | |
136 | ||
137 | v4l2_info(sd, "Input: %d%s\n", v, | |
138 | (m & 0x80) ? " (muted)" : ""); | |
139 | if (vol >= 32) | |
140 | vol = vol - 64; | |
141 | v4l2_info(sd, "Volume: %d dB\n", vol); | |
142 | return 0; | |
143 | } | |
144 | ||
b3ee7e21 HV |
145 | /* ----------------------------------------------------------------------- */ |
146 | ||
147 | static const struct v4l2_subdev_core_ops cs5345_core_ops = { | |
148 | .log_status = cs5345_log_status, | |
149 | .g_chip_ident = cs5345_g_chip_ident, | |
150 | .g_ctrl = cs5345_g_ctrl, | |
151 | .s_ctrl = cs5345_s_ctrl, | |
152 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
153 | .g_register = cs5345_g_register, | |
154 | .s_register = cs5345_s_register, | |
155 | #endif | |
156 | }; | |
157 | ||
158 | static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { | |
159 | .s_routing = cs5345_s_routing, | |
160 | }; | |
161 | ||
162 | static const struct v4l2_subdev_ops cs5345_ops = { | |
163 | .core = &cs5345_core_ops, | |
164 | .audio = &cs5345_audio_ops, | |
165 | }; | |
6fb377f8 HV |
166 | |
167 | /* ----------------------------------------------------------------------- */ | |
168 | ||
d2653e92 JD |
169 | static int cs5345_probe(struct i2c_client *client, |
170 | const struct i2c_device_id *id) | |
6fb377f8 | 171 | { |
b3ee7e21 HV |
172 | struct v4l2_subdev *sd; |
173 | ||
6fb377f8 HV |
174 | /* Check if the adapter supports the needed features */ |
175 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
176 | return -EIO; | |
177 | ||
178 | v4l_info(client, "chip found @ 0x%x (%s)\n", | |
179 | client->addr << 1, client->adapter->name); | |
180 | ||
b3ee7e21 HV |
181 | sd = kzalloc(sizeof(struct v4l2_subdev), GFP_KERNEL); |
182 | if (sd == NULL) | |
183 | return -ENOMEM; | |
184 | v4l2_i2c_subdev_init(sd, client, &cs5345_ops); | |
185 | ||
186 | cs5345_write(sd, 0x02, 0x00); | |
187 | cs5345_write(sd, 0x04, 0x01); | |
188 | cs5345_write(sd, 0x09, 0x01); | |
189 | return 0; | |
190 | } | |
191 | ||
192 | /* ----------------------------------------------------------------------- */ | |
193 | ||
194 | static int cs5345_remove(struct i2c_client *client) | |
195 | { | |
196 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
197 | ||
198 | v4l2_device_unregister_subdev(sd); | |
199 | kfree(sd); | |
6fb377f8 HV |
200 | return 0; |
201 | } | |
202 | ||
203 | /* ----------------------------------------------------------------------- */ | |
204 | ||
af294867 JD |
205 | static const struct i2c_device_id cs5345_id[] = { |
206 | { "cs5345", 0 }, | |
207 | { } | |
208 | }; | |
209 | MODULE_DEVICE_TABLE(i2c, cs5345_id); | |
210 | ||
51e86846 HV |
211 | static struct i2c_driver cs5345_driver = { |
212 | .driver = { | |
213 | .owner = THIS_MODULE, | |
214 | .name = "cs5345", | |
215 | }, | |
216 | .probe = cs5345_probe, | |
217 | .remove = cs5345_remove, | |
218 | .id_table = cs5345_id, | |
6fb377f8 | 219 | }; |
51e86846 HV |
220 | |
221 | static __init int init_cs5345(void) | |
222 | { | |
223 | return i2c_add_driver(&cs5345_driver); | |
224 | } | |
225 | ||
226 | static __exit void exit_cs5345(void) | |
227 | { | |
228 | i2c_del_driver(&cs5345_driver); | |
229 | } | |
230 | ||
231 | module_init(init_cs5345); | |
232 | module_exit(exit_cs5345); |