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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/module.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/i2c.h> | |
24 | #include <linux/videodev2.h> | |
25 | #include <linux/slab.h> | |
26 | #include <media/v4l2-device.h> | |
27 | #include <media/v4l2-chip-ident.h> | |
28 | #include <media/v4l2-ctrls.h> | |
29 | ||
30 | MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); | |
31 | MODULE_AUTHOR("Hans Verkuil"); | |
32 | MODULE_LICENSE("GPL"); | |
33 | ||
34 | static bool debug; | |
35 | ||
36 | module_param(debug, bool, 0644); | |
37 | ||
38 | MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); | |
39 | ||
40 | struct cs5345_state { | |
41 | struct v4l2_subdev sd; | |
42 | struct v4l2_ctrl_handler hdl; | |
43 | }; | |
44 | ||
45 | static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) | |
46 | { | |
47 | return container_of(sd, struct cs5345_state, sd); | |
48 | } | |
49 | ||
50 | static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) | |
51 | { | |
52 | return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; | |
53 | } | |
54 | ||
55 | /* ----------------------------------------------------------------------- */ | |
56 | ||
57 | static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) | |
58 | { | |
59 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
60 | ||
61 | return i2c_smbus_write_byte_data(client, reg, value); | |
62 | } | |
63 | ||
64 | static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) | |
65 | { | |
66 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
67 | ||
68 | return i2c_smbus_read_byte_data(client, reg); | |
69 | } | |
70 | ||
71 | static int cs5345_s_routing(struct v4l2_subdev *sd, | |
72 | u32 input, u32 output, u32 config) | |
73 | { | |
74 | if ((input & 0xf) > 6) { | |
75 | v4l2_err(sd, "Invalid input %d.\n", input); | |
76 | return -EINVAL; | |
77 | } | |
78 | cs5345_write(sd, 0x09, input & 0xf); | |
79 | cs5345_write(sd, 0x05, input & 0xf0); | |
80 | return 0; | |
81 | } | |
82 | ||
83 | static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl) | |
84 | { | |
85 | struct v4l2_subdev *sd = to_sd(ctrl); | |
86 | ||
87 | switch (ctrl->id) { | |
88 | case V4L2_CID_AUDIO_MUTE: | |
89 | cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0); | |
90 | return 0; | |
91 | case V4L2_CID_AUDIO_VOLUME: | |
92 | cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f); | |
93 | cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f); | |
94 | return 0; | |
95 | } | |
96 | return -EINVAL; | |
97 | } | |
98 | ||
99 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
100 | static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) | |
101 | { | |
102 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
103 | ||
104 | if (!v4l2_chip_match_i2c_client(client, ®->match)) | |
105 | return -EINVAL; | |
106 | if (!capable(CAP_SYS_ADMIN)) | |
107 | return -EPERM; | |
108 | reg->size = 1; | |
109 | reg->val = cs5345_read(sd, reg->reg & 0x1f); | |
110 | return 0; | |
111 | } | |
112 | ||
113 | static int cs5345_s_register(struct v4l2_subdev *sd, const struct v4l2_dbg_register *reg) | |
114 | { | |
115 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
116 | ||
117 | if (!v4l2_chip_match_i2c_client(client, ®->match)) | |
118 | return -EINVAL; | |
119 | if (!capable(CAP_SYS_ADMIN)) | |
120 | return -EPERM; | |
121 | cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); | |
122 | return 0; | |
123 | } | |
124 | #endif | |
125 | ||
126 | static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) | |
127 | { | |
128 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
129 | ||
130 | return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0); | |
131 | } | |
132 | ||
133 | static int cs5345_log_status(struct v4l2_subdev *sd) | |
134 | { | |
135 | u8 v = cs5345_read(sd, 0x09) & 7; | |
136 | u8 m = cs5345_read(sd, 0x04); | |
137 | int vol = cs5345_read(sd, 0x08) & 0x3f; | |
138 | ||
139 | v4l2_info(sd, "Input: %d%s\n", v, | |
140 | (m & 0x80) ? " (muted)" : ""); | |
141 | if (vol >= 32) | |
142 | vol = vol - 64; | |
143 | v4l2_info(sd, "Volume: %d dB\n", vol); | |
144 | return 0; | |
145 | } | |
146 | ||
147 | /* ----------------------------------------------------------------------- */ | |
148 | ||
149 | static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { | |
150 | .s_ctrl = cs5345_s_ctrl, | |
151 | }; | |
152 | ||
153 | static const struct v4l2_subdev_core_ops cs5345_core_ops = { | |
154 | .log_status = cs5345_log_status, | |
155 | .g_chip_ident = cs5345_g_chip_ident, | |
156 | .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, | |
157 | .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, | |
158 | .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, | |
159 | .g_ctrl = v4l2_subdev_g_ctrl, | |
160 | .s_ctrl = v4l2_subdev_s_ctrl, | |
161 | .queryctrl = v4l2_subdev_queryctrl, | |
162 | .querymenu = v4l2_subdev_querymenu, | |
163 | #ifdef CONFIG_VIDEO_ADV_DEBUG | |
164 | .g_register = cs5345_g_register, | |
165 | .s_register = cs5345_s_register, | |
166 | #endif | |
167 | }; | |
168 | ||
169 | static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { | |
170 | .s_routing = cs5345_s_routing, | |
171 | }; | |
172 | ||
173 | static const struct v4l2_subdev_ops cs5345_ops = { | |
174 | .core = &cs5345_core_ops, | |
175 | .audio = &cs5345_audio_ops, | |
176 | }; | |
177 | ||
178 | /* ----------------------------------------------------------------------- */ | |
179 | ||
180 | static int cs5345_probe(struct i2c_client *client, | |
181 | const struct i2c_device_id *id) | |
182 | { | |
183 | struct cs5345_state *state; | |
184 | struct v4l2_subdev *sd; | |
185 | ||
186 | /* Check if the adapter supports the needed features */ | |
187 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
188 | return -EIO; | |
189 | ||
190 | v4l_info(client, "chip found @ 0x%x (%s)\n", | |
191 | client->addr << 1, client->adapter->name); | |
192 | ||
193 | state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL); | |
194 | if (state == NULL) | |
195 | return -ENOMEM; | |
196 | sd = &state->sd; | |
197 | v4l2_i2c_subdev_init(sd, client, &cs5345_ops); | |
198 | ||
199 | v4l2_ctrl_handler_init(&state->hdl, 2); | |
200 | v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, | |
201 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); | |
202 | v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, | |
203 | V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); | |
204 | sd->ctrl_handler = &state->hdl; | |
205 | if (state->hdl.error) { | |
206 | int err = state->hdl.error; | |
207 | ||
208 | v4l2_ctrl_handler_free(&state->hdl); | |
209 | kfree(state); | |
210 | return err; | |
211 | } | |
212 | /* set volume/mute */ | |
213 | v4l2_ctrl_handler_setup(&state->hdl); | |
214 | ||
215 | cs5345_write(sd, 0x02, 0x00); | |
216 | cs5345_write(sd, 0x04, 0x01); | |
217 | cs5345_write(sd, 0x09, 0x01); | |
218 | return 0; | |
219 | } | |
220 | ||
221 | /* ----------------------------------------------------------------------- */ | |
222 | ||
223 | static int cs5345_remove(struct i2c_client *client) | |
224 | { | |
225 | struct v4l2_subdev *sd = i2c_get_clientdata(client); | |
226 | struct cs5345_state *state = to_state(sd); | |
227 | ||
228 | v4l2_device_unregister_subdev(sd); | |
229 | v4l2_ctrl_handler_free(&state->hdl); | |
230 | kfree(state); | |
231 | return 0; | |
232 | } | |
233 | ||
234 | /* ----------------------------------------------------------------------- */ | |
235 | ||
236 | static const struct i2c_device_id cs5345_id[] = { | |
237 | { "cs5345", 0 }, | |
238 | { } | |
239 | }; | |
240 | MODULE_DEVICE_TABLE(i2c, cs5345_id); | |
241 | ||
242 | static struct i2c_driver cs5345_driver = { | |
243 | .driver = { | |
244 | .owner = THIS_MODULE, | |
245 | .name = "cs5345", | |
246 | }, | |
247 | .probe = cs5345_probe, | |
248 | .remove = cs5345_remove, | |
249 | .id_table = cs5345_id, | |
250 | }; | |
251 | ||
252 | module_i2c_driver(cs5345_driver); |