232 строки
6.0 KiB
C
232 строки
6.0 KiB
C
/*
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* cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
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* Copyright (C) 2005 Martin Vaughan
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*
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* Audio source switching for Adaptec AVC-2410 added by Trev Jackson
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <linux/ioctl.h>
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#include <asm/uaccess.h>
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#include <linux/i2c.h>
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#include <linux/videodev2.h>
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#include <media/v4l2-device.h>
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#include <media/v4l2-ctrls.h>
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MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
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MODULE_AUTHOR("Martin Vaughan");
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MODULE_LICENSE("GPL");
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static bool debug;
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module_param(debug, bool, 0644);
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MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
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struct cs53l32a_state {
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struct v4l2_subdev sd;
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struct v4l2_ctrl_handler hdl;
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};
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static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd)
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{
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return container_of(sd, struct cs53l32a_state, sd);
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}
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static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
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{
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return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd;
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}
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/* ----------------------------------------------------------------------- */
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static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return i2c_smbus_write_byte_data(client, reg, value);
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}
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static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg)
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{
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struct i2c_client *client = v4l2_get_subdevdata(sd);
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return i2c_smbus_read_byte_data(client, reg);
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}
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static int cs53l32a_s_routing(struct v4l2_subdev *sd,
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u32 input, u32 output, u32 config)
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{
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/* There are 2 physical inputs, but the second input can be
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placed in two modes, the first mode bypasses the PGA (gain),
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the second goes through the PGA. Hence there are three
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possible inputs to choose from. */
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if (input > 2) {
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v4l2_err(sd, "Invalid input %d.\n", input);
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return -EINVAL;
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}
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cs53l32a_write(sd, 0x01, 0x01 + (input << 4));
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return 0;
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}
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static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl)
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{
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struct v4l2_subdev *sd = to_sd(ctrl);
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switch (ctrl->id) {
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case V4L2_CID_AUDIO_MUTE:
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cs53l32a_write(sd, 0x03, ctrl->val ? 0xf0 : 0x30);
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return 0;
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case V4L2_CID_AUDIO_VOLUME:
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cs53l32a_write(sd, 0x04, (u8)ctrl->val);
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cs53l32a_write(sd, 0x05, (u8)ctrl->val);
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return 0;
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}
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return -EINVAL;
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}
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static int cs53l32a_log_status(struct v4l2_subdev *sd)
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{
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struct cs53l32a_state *state = to_state(sd);
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u8 v = cs53l32a_read(sd, 0x01);
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v4l2_info(sd, "Input: %d\n", (v >> 4) & 3);
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v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
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return 0;
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}
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/* ----------------------------------------------------------------------- */
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static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = {
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.s_ctrl = cs53l32a_s_ctrl,
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};
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static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
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.log_status = cs53l32a_log_status,
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};
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static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = {
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.s_routing = cs53l32a_s_routing,
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};
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static const struct v4l2_subdev_ops cs53l32a_ops = {
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.core = &cs53l32a_core_ops,
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.audio = &cs53l32a_audio_ops,
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};
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/* ----------------------------------------------------------------------- */
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/* i2c implementation */
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/*
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* Generic i2c probe
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* concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
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*/
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static int cs53l32a_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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struct cs53l32a_state *state;
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struct v4l2_subdev *sd;
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int i;
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/* Check if the adapter supports the needed features */
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if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
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return -EIO;
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if (!id)
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strlcpy(client->name, "cs53l32a", sizeof(client->name));
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v4l_info(client, "chip found @ 0x%x (%s)\n",
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client->addr << 1, client->adapter->name);
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state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL);
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if (state == NULL)
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return -ENOMEM;
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sd = &state->sd;
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v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops);
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for (i = 1; i <= 7; i++) {
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u8 v = cs53l32a_read(sd, i);
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v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
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}
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v4l2_ctrl_handler_init(&state->hdl, 2);
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v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
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V4L2_CID_AUDIO_VOLUME, -96, 12, 1, 0);
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v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops,
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V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
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sd->ctrl_handler = &state->hdl;
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if (state->hdl.error) {
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int err = state->hdl.error;
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v4l2_ctrl_handler_free(&state->hdl);
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return err;
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}
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/* Set cs53l32a internal register for Adaptec 2010/2410 setup */
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cs53l32a_write(sd, 0x01, 0x21);
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cs53l32a_write(sd, 0x02, 0x29);
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cs53l32a_write(sd, 0x03, 0x30);
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cs53l32a_write(sd, 0x04, 0x00);
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cs53l32a_write(sd, 0x05, 0x00);
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cs53l32a_write(sd, 0x06, 0x00);
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cs53l32a_write(sd, 0x07, 0x00);
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/* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
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for (i = 1; i <= 7; i++) {
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u8 v = cs53l32a_read(sd, i);
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v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
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}
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return 0;
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}
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static int cs53l32a_remove(struct i2c_client *client)
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{
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struct v4l2_subdev *sd = i2c_get_clientdata(client);
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struct cs53l32a_state *state = to_state(sd);
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v4l2_device_unregister_subdev(sd);
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v4l2_ctrl_handler_free(&state->hdl);
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return 0;
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}
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static const struct i2c_device_id cs53l32a_id[] = {
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{ "cs53l32a", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
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static struct i2c_driver cs53l32a_driver = {
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.driver = {
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.name = "cs53l32a",
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},
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.probe = cs53l32a_probe,
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.remove = cs53l32a_remove,
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.id_table = cs53l32a_id,
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};
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module_i2c_driver(cs53l32a_driver);
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