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- /*
- * cs5345 Cirrus Logic 24-bit, 192 kHz Stereo Audio ADC
- * Copyright (C) 2007 Hans Verkuil
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
- #include <linux/version.h>
- #include <linux/module.h>
- #include <linux/kernel.h>
- #include <linux/i2c.h>
- #include <linux/videodev2.h>
- #include <media/v4l2-i2c-drv.h>
- #include <media/v4l2-common.h>
- #include <media/v4l2-chip-ident.h>
- MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC");
- MODULE_AUTHOR("Hans Verkuil");
- MODULE_LICENSE("GPL");
- static int debug;
- module_param(debug, bool, 0644);
- MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
- /* ----------------------------------------------------------------------- */
- static inline int cs5345_write(struct i2c_client *client, u8 reg, u8 value)
- {
- return i2c_smbus_write_byte_data(client, reg, value);
- }
- static inline int cs5345_read(struct i2c_client *client, u8 reg)
- {
- return i2c_smbus_read_byte_data(client, reg);
- }
- static int cs5345_command(struct i2c_client *client, unsigned cmd, void *arg)
- {
- struct v4l2_routing *route = arg;
- struct v4l2_control *ctrl = arg;
- switch (cmd) {
- case VIDIOC_INT_G_AUDIO_ROUTING:
- route->input = cs5345_read(client, 0x09) & 7;
- route->input |= cs5345_read(client, 0x05) & 0x70;
- route->output = 0;
- break;
- case VIDIOC_INT_S_AUDIO_ROUTING:
- if ((route->input & 0xf) > 6) {
- v4l_err(client, "Invalid input %d.\n", route->input);
- return -EINVAL;
- }
- cs5345_write(client, 0x09, route->input & 0xf);
- cs5345_write(client, 0x05, route->input & 0xf0);
- break;
- case VIDIOC_G_CTRL:
- if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
- ctrl->value = (cs5345_read(client, 0x04) & 0x08) != 0;
- break;
- }
- if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
- return -EINVAL;
- ctrl->value = cs5345_read(client, 0x07) & 0x3f;
- if (ctrl->value >= 32)
- ctrl->value = ctrl->value - 64;
- break;
- case VIDIOC_S_CTRL:
- break;
- if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
- cs5345_write(client, 0x04, ctrl->value ? 0x80 : 0);
- break;
- }
- if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
- return -EINVAL;
- if (ctrl->value > 24 || ctrl->value < -24)
- return -EINVAL;
- cs5345_write(client, 0x07, ((u8)ctrl->value) & 0x3f);
- cs5345_write(client, 0x08, ((u8)ctrl->value) & 0x3f);
- break;
- #ifdef CONFIG_VIDEO_ADV_DEBUG
- case VIDIOC_DBG_G_REGISTER:
- case VIDIOC_DBG_S_REGISTER:
- {
- struct v4l2_register *reg = arg;
- if (!v4l2_chip_match_i2c_client(client,
- reg->match_type, reg->match_chip))
- return -EINVAL;
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (cmd == VIDIOC_DBG_G_REGISTER)
- reg->val = cs5345_read(client, reg->reg & 0x1f);
- else
- cs5345_write(client, reg->reg & 0x1f, reg->val & 0xff);
- break;
- }
- #endif
- case VIDIOC_G_CHIP_IDENT:
- return v4l2_chip_ident_i2c_client(client,
- arg, V4L2_IDENT_CS5345, 0);
- case VIDIOC_LOG_STATUS:
- {
- u8 v = cs5345_read(client, 0x09) & 7;
- u8 m = cs5345_read(client, 0x04);
- int vol = cs5345_read(client, 0x08) & 0x3f;
- v4l_info(client, "Input: %d%s\n", v,
- (m & 0x80) ? " (muted)" : "");
- if (vol >= 32)
- vol = vol - 64;
- v4l_info(client, "Volume: %d dB\n", vol);
- break;
- }
- default:
- return -EINVAL;
- }
- return 0;
- }
- /* ----------------------------------------------------------------------- */
- static int cs5345_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
- {
- /* Check if the adapter supports the needed features */
- if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- return -EIO;
- v4l_info(client, "chip found @ 0x%x (%s)\n",
- client->addr << 1, client->adapter->name);
- cs5345_write(client, 0x02, 0x00);
- cs5345_write(client, 0x04, 0x01);
- cs5345_write(client, 0x09, 0x01);
- return 0;
- }
- /* ----------------------------------------------------------------------- */
- static const struct i2c_device_id cs5345_id[] = {
- { "cs5345", 0 },
- { }
- };
- MODULE_DEVICE_TABLE(i2c, cs5345_id);
- static struct v4l2_i2c_driver_data v4l2_i2c_data = {
- .name = "cs5345",
- .driverid = I2C_DRIVERID_CS5345,
- .command = cs5345_command,
- .probe = cs5345_probe,
- .id_table = cs5345_id,
- };
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