1 /*
2 * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
3 * Copyright (C) 2005 Martin Vaughan
4 *
5 * Audio source switching for Adaptec AVC-2410 added by Trev Jackson
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22
23 #include <linux/module.h>
24 #include <linux/types.h>
25 #include <linux/slab.h>
26 #include <linux/ioctl.h>
27 #include <asm/uaccess.h>
28 #include <linux/i2c.h>
29 #include <linux/videodev2.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-chip-ident.h>
32 #include <media/v4l2-ctrls.h>
33
34 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
35 MODULE_AUTHOR("Martin Vaughan");
36 MODULE_LICENSE("GPL");
37
38 static bool debug;
39
40 module_param(debug, bool, 0644);
41
42 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
43
44
45 struct cs53l32a_state {
46 struct v4l2_subdev sd;
47 struct v4l2_ctrl_handler hdl;
48 };
49
to_state(struct v4l2_subdev * sd)50 static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd)
51 {
52 return container_of(sd, struct cs53l32a_state, sd);
53 }
54
to_sd(struct v4l2_ctrl * ctrl)55 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
56 {
57 return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd;
58 }
59
60 /* ----------------------------------------------------------------------- */
61
cs53l32a_write(struct v4l2_subdev * sd,u8 reg,u8 value)62 static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value)
63 {
64 struct i2c_client *client = v4l2_get_subdevdata(sd);
65
66 return i2c_smbus_write_byte_data(client, reg, value);
67 }
68
cs53l32a_read(struct v4l2_subdev * sd,u8 reg)69 static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg)
70 {
71 struct i2c_client *client = v4l2_get_subdevdata(sd);
72
73 return i2c_smbus_read_byte_data(client, reg);
74 }
75
cs53l32a_s_routing(struct v4l2_subdev * sd,u32 input,u32 output,u32 config)76 static int cs53l32a_s_routing(struct v4l2_subdev *sd,
77 u32 input, u32 output, u32 config)
78 {
79 /* There are 2 physical inputs, but the second input can be
80 placed in two modes, the first mode bypasses the PGA (gain),
81 the second goes through the PGA. Hence there are three
82 possible inputs to choose from. */
83 if (input > 2) {
84 v4l2_err(sd, "Invalid input %d.\n", input);
85 return -EINVAL;
86 }
87 cs53l32a_write(sd, 0x01, 0x01 + (input << 4));
88 return 0;
89 }
90
cs53l32a_s_ctrl(struct v4l2_ctrl * ctrl)91 static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl)
92 {
93 struct v4l2_subdev *sd = to_sd(ctrl);
94
95 switch (ctrl->id) {
96 case V4L2_CID_AUDIO_MUTE:
97 cs53l32a_write(sd, 0x03, ctrl->val ? 0xf0 : 0x30);
98 return 0;
99 case V4L2_CID_AUDIO_VOLUME:
100 cs53l32a_write(sd, 0x04, (u8)ctrl->val);
101 cs53l32a_write(sd, 0x05, (u8)ctrl->val);
102 return 0;
103 }
104 return -EINVAL;
105 }
106
cs53l32a_g_chip_ident(struct v4l2_subdev * sd,struct v4l2_dbg_chip_ident * chip)107 static int cs53l32a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
108 {
109 struct i2c_client *client = v4l2_get_subdevdata(sd);
110
111 return v4l2_chip_ident_i2c_client(client,
112 chip, V4L2_IDENT_CS53l32A, 0);
113 }
114
cs53l32a_log_status(struct v4l2_subdev * sd)115 static int cs53l32a_log_status(struct v4l2_subdev *sd)
116 {
117 struct cs53l32a_state *state = to_state(sd);
118 u8 v = cs53l32a_read(sd, 0x01);
119
120 v4l2_info(sd, "Input: %d\n", (v >> 4) & 3);
121 v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
122 return 0;
123 }
124
125 /* ----------------------------------------------------------------------- */
126
127 static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = {
128 .s_ctrl = cs53l32a_s_ctrl,
129 };
130
131 static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
132 .log_status = cs53l32a_log_status,
133 .g_chip_ident = cs53l32a_g_chip_ident,
134 .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
135 .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
136 .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
137 .g_ctrl = v4l2_subdev_g_ctrl,
138 .s_ctrl = v4l2_subdev_s_ctrl,
139 .queryctrl = v4l2_subdev_queryctrl,
140 .querymenu = v4l2_subdev_querymenu,
141 };
142
143 static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = {
144 .s_routing = cs53l32a_s_routing,
145 };
146
147 static const struct v4l2_subdev_ops cs53l32a_ops = {
148 .core = &cs53l32a_core_ops,
149 .audio = &cs53l32a_audio_ops,
150 };
151
152 /* ----------------------------------------------------------------------- */
153
154 /* i2c implementation */
155
156 /*
157 * Generic i2c probe
158 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
159 */
160
cs53l32a_probe(struct i2c_client * client,const struct i2c_device_id * id)161 static int cs53l32a_probe(struct i2c_client *client,
162 const struct i2c_device_id *id)
163 {
164 struct cs53l32a_state *state;
165 struct v4l2_subdev *sd;
166 int i;
167
168 /* Check if the adapter supports the needed features */
169 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
170 return -EIO;
171
172 if (!id)
173 strlcpy(client->name, "cs53l32a", sizeof(client->name));
174
175 v4l_info(client, "chip found @ 0x%x (%s)\n",
176 client->addr << 1, client->adapter->name);
177
178 state = kzalloc(sizeof(struct cs53l32a_state), GFP_KERNEL);
179 if (state == NULL)
180 return -ENOMEM;
181 sd = &state->sd;
182 v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops);
183
184 for (i = 1; i <= 7; i++) {
185 u8 v = cs53l32a_read(sd, i);
186
187 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
188 }
189
190 v4l2_ctrl_handler_init(&state->hdl, 2);
191 v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
192 V4L2_CID_AUDIO_VOLUME, -96, 12, 1, 0);
193 v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
194 V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
195 sd->ctrl_handler = &state->hdl;
196 if (state->hdl.error) {
197 int err = state->hdl.error;
198
199 v4l2_ctrl_handler_free(&state->hdl);
200 kfree(state);
201 return err;
202 }
203
204 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
205
206 cs53l32a_write(sd, 0x01, 0x21);
207 cs53l32a_write(sd, 0x02, 0x29);
208 cs53l32a_write(sd, 0x03, 0x30);
209 cs53l32a_write(sd, 0x04, 0x00);
210 cs53l32a_write(sd, 0x05, 0x00);
211 cs53l32a_write(sd, 0x06, 0x00);
212 cs53l32a_write(sd, 0x07, 0x00);
213
214 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
215
216 for (i = 1; i <= 7; i++) {
217 u8 v = cs53l32a_read(sd, i);
218
219 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
220 }
221 return 0;
222 }
223
cs53l32a_remove(struct i2c_client * client)224 static int cs53l32a_remove(struct i2c_client *client)
225 {
226 struct v4l2_subdev *sd = i2c_get_clientdata(client);
227 struct cs53l32a_state *state = to_state(sd);
228
229 v4l2_device_unregister_subdev(sd);
230 v4l2_ctrl_handler_free(&state->hdl);
231 kfree(state);
232 return 0;
233 }
234
235 static const struct i2c_device_id cs53l32a_id[] = {
236 { "cs53l32a", 0 },
237 { }
238 };
239 MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
240
241 static struct i2c_driver cs53l32a_driver = {
242 .driver = {
243 .owner = THIS_MODULE,
244 .name = "cs53l32a",
245 },
246 .probe = cs53l32a_probe,
247 .remove = cs53l32a_remove,
248 .id_table = cs53l32a_id,
249 };
250
251 module_i2c_driver(cs53l32a_driver);
252