1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver. |
4 | * Copyright (C) 2005 Martin Vaughan |
5 | * |
6 | * Audio source switching for Adaptec AVC-2410 added by Trev Jackson |
7 | */ |
8 | |
9 | |
10 | #include <linux/module.h> |
11 | #include <linux/types.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/ioctl.h> |
14 | #include <linux/uaccess.h> |
15 | #include <linux/i2c.h> |
16 | #include <linux/videodev2.h> |
17 | #include <media/v4l2-device.h> |
18 | #include <media/v4l2-ctrls.h> |
19 | |
20 | MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC" ); |
21 | MODULE_AUTHOR("Martin Vaughan" ); |
22 | MODULE_LICENSE("GPL" ); |
23 | |
24 | static bool debug; |
25 | |
26 | module_param(debug, bool, 0644); |
27 | |
28 | MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On" ); |
29 | |
30 | |
31 | struct cs53l32a_state { |
32 | struct v4l2_subdev sd; |
33 | struct v4l2_ctrl_handler hdl; |
34 | }; |
35 | |
36 | static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd) |
37 | { |
38 | return container_of(sd, struct cs53l32a_state, sd); |
39 | } |
40 | |
41 | static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) |
42 | { |
43 | return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd; |
44 | } |
45 | |
46 | /* ----------------------------------------------------------------------- */ |
47 | |
48 | static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value) |
49 | { |
50 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
51 | |
52 | return i2c_smbus_write_byte_data(client, command: reg, value); |
53 | } |
54 | |
55 | static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg) |
56 | { |
57 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
58 | |
59 | return i2c_smbus_read_byte_data(client, command: reg); |
60 | } |
61 | |
62 | static int cs53l32a_s_routing(struct v4l2_subdev *sd, |
63 | u32 input, u32 output, u32 config) |
64 | { |
65 | /* There are 2 physical inputs, but the second input can be |
66 | placed in two modes, the first mode bypasses the PGA (gain), |
67 | the second goes through the PGA. Hence there are three |
68 | possible inputs to choose from. */ |
69 | if (input > 2) { |
70 | v4l2_err(sd, "Invalid input %d.\n" , input); |
71 | return -EINVAL; |
72 | } |
73 | cs53l32a_write(sd, reg: 0x01, value: 0x01 + (input << 4)); |
74 | return 0; |
75 | } |
76 | |
77 | static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl) |
78 | { |
79 | struct v4l2_subdev *sd = to_sd(ctrl); |
80 | |
81 | switch (ctrl->id) { |
82 | case V4L2_CID_AUDIO_MUTE: |
83 | cs53l32a_write(sd, reg: 0x03, value: ctrl->val ? 0xf0 : 0x30); |
84 | return 0; |
85 | case V4L2_CID_AUDIO_VOLUME: |
86 | cs53l32a_write(sd, reg: 0x04, value: (u8)ctrl->val); |
87 | cs53l32a_write(sd, reg: 0x05, value: (u8)ctrl->val); |
88 | return 0; |
89 | } |
90 | return -EINVAL; |
91 | } |
92 | |
93 | static int cs53l32a_log_status(struct v4l2_subdev *sd) |
94 | { |
95 | struct cs53l32a_state *state = to_state(sd); |
96 | u8 v = cs53l32a_read(sd, reg: 0x01); |
97 | |
98 | v4l2_info(sd, "Input: %d\n" , (v >> 4) & 3); |
99 | v4l2_ctrl_handler_log_status(hdl: &state->hdl, prefix: sd->name); |
100 | return 0; |
101 | } |
102 | |
103 | /* ----------------------------------------------------------------------- */ |
104 | |
105 | static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = { |
106 | .s_ctrl = cs53l32a_s_ctrl, |
107 | }; |
108 | |
109 | static const struct v4l2_subdev_core_ops cs53l32a_core_ops = { |
110 | .log_status = cs53l32a_log_status, |
111 | }; |
112 | |
113 | static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = { |
114 | .s_routing = cs53l32a_s_routing, |
115 | }; |
116 | |
117 | static const struct v4l2_subdev_ops cs53l32a_ops = { |
118 | .core = &cs53l32a_core_ops, |
119 | .audio = &cs53l32a_audio_ops, |
120 | }; |
121 | |
122 | /* ----------------------------------------------------------------------- */ |
123 | |
124 | /* i2c implementation */ |
125 | |
126 | /* |
127 | * Generic i2c probe |
128 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' |
129 | */ |
130 | |
131 | static int cs53l32a_probe(struct i2c_client *client) |
132 | { |
133 | const struct i2c_device_id *id = i2c_client_get_device_id(client); |
134 | struct cs53l32a_state *state; |
135 | struct v4l2_subdev *sd; |
136 | int i; |
137 | |
138 | /* Check if the adapter supports the needed features */ |
139 | if (!i2c_check_functionality(adap: client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
140 | return -EIO; |
141 | |
142 | if (!id) |
143 | strscpy(client->name, "cs53l32a" , sizeof(client->name)); |
144 | |
145 | v4l_info(client, "chip found @ 0x%x (%s)\n" , |
146 | client->addr << 1, client->adapter->name); |
147 | |
148 | state = devm_kzalloc(dev: &client->dev, size: sizeof(*state), GFP_KERNEL); |
149 | if (state == NULL) |
150 | return -ENOMEM; |
151 | sd = &state->sd; |
152 | v4l2_i2c_subdev_init(sd, client, ops: &cs53l32a_ops); |
153 | |
154 | for (i = 1; i <= 7; i++) { |
155 | u8 v = cs53l32a_read(sd, reg: i); |
156 | |
157 | v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n" , i, v); |
158 | } |
159 | |
160 | v4l2_ctrl_handler_init(&state->hdl, 2); |
161 | v4l2_ctrl_new_std(hdl: &state->hdl, ops: &cs53l32a_ctrl_ops, |
162 | V4L2_CID_AUDIO_VOLUME, min: -96, max: 12, step: 1, def: 0); |
163 | v4l2_ctrl_new_std(hdl: &state->hdl, ops: &cs53l32a_ctrl_ops, |
164 | V4L2_CID_AUDIO_MUTE, min: 0, max: 1, step: 1, def: 0); |
165 | sd->ctrl_handler = &state->hdl; |
166 | if (state->hdl.error) { |
167 | int err = state->hdl.error; |
168 | |
169 | v4l2_ctrl_handler_free(hdl: &state->hdl); |
170 | return err; |
171 | } |
172 | |
173 | /* Set cs53l32a internal register for Adaptec 2010/2410 setup */ |
174 | |
175 | cs53l32a_write(sd, reg: 0x01, value: 0x21); |
176 | cs53l32a_write(sd, reg: 0x02, value: 0x29); |
177 | cs53l32a_write(sd, reg: 0x03, value: 0x30); |
178 | cs53l32a_write(sd, reg: 0x04, value: 0x00); |
179 | cs53l32a_write(sd, reg: 0x05, value: 0x00); |
180 | cs53l32a_write(sd, reg: 0x06, value: 0x00); |
181 | cs53l32a_write(sd, reg: 0x07, value: 0x00); |
182 | |
183 | /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */ |
184 | |
185 | for (i = 1; i <= 7; i++) { |
186 | u8 v = cs53l32a_read(sd, reg: i); |
187 | |
188 | v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n" , i, v); |
189 | } |
190 | return 0; |
191 | } |
192 | |
193 | static void cs53l32a_remove(struct i2c_client *client) |
194 | { |
195 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
196 | struct cs53l32a_state *state = to_state(sd); |
197 | |
198 | v4l2_device_unregister_subdev(sd); |
199 | v4l2_ctrl_handler_free(hdl: &state->hdl); |
200 | } |
201 | |
202 | static const struct i2c_device_id cs53l32a_id[] = { |
203 | { "cs53l32a" , 0 }, |
204 | { } |
205 | }; |
206 | MODULE_DEVICE_TABLE(i2c, cs53l32a_id); |
207 | |
208 | static struct i2c_driver cs53l32a_driver = { |
209 | .driver = { |
210 | .name = "cs53l32a" , |
211 | }, |
212 | .probe = cs53l32a_probe, |
213 | .remove = cs53l32a_remove, |
214 | .id_table = cs53l32a_id, |
215 | }; |
216 | |
217 | module_i2c_driver(cs53l32a_driver); |
218 | |