diff options
Diffstat (limited to 'drivers/media/video/cs5345.c')
| -rw-r--r-- | drivers/media/video/cs5345.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/media/video/cs5345.c b/drivers/media/video/cs5345.c new file mode 100644 index 0000000..fae469c --- /dev/null +++ b/drivers/media/video/cs5345.c @@ -0,0 +1,168 @@ +/* + * 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\n\t\t\t0=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 & 0x1f); + 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) +{ + /* 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 struct v4l2_i2c_driver_data v4l2_i2c_data = { + .name = "cs5345", + .driverid = I2C_DRIVERID_CS5345, + .command = cs5345_command, + .probe = cs5345_probe, +}; + |