/* * 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/module.h> #include <linux/kernel.h> #include <linux/i2c.h> #include <linux/videodev2.h> #include <linux/slab.h> #include <media/v4l2-device.h> #include <media/v4l2-chip-ident.h> #include <media/v4l2-ctrls.h> MODULE_DESCRIPTION("i2c device driver for cs5345 Audio ADC"); MODULE_AUTHOR("Hans Verkuil"); MODULE_LICENSE("GPL"); static bool debug; module_param(debug, bool, 0644); MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); struct cs5345_state { struct v4l2_subdev sd; struct v4l2_ctrl_handler hdl; }; static inline struct cs5345_state *to_state(struct v4l2_subdev *sd) { return container_of(sd, struct cs5345_state, sd); } static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) { return &container_of(ctrl->handler, struct cs5345_state, hdl)->sd; } /* ----------------------------------------------------------------------- */ static inline int cs5345_write(struct v4l2_subdev *sd, u8 reg, u8 value) { struct i2c_client *client = v4l2_get_subdevdata(sd); return i2c_smbus_write_byte_data(client, reg, value); } static inline int cs5345_read(struct v4l2_subdev *sd, u8 reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); return i2c_smbus_read_byte_data(client, reg); } static int cs5345_s_routing(struct v4l2_subdev *sd, u32 input, u32 output, u32 config) { if ((input & 0xf) > 6) { v4l2_err(sd, "Invalid input %d.\n", input); return -EINVAL; } cs5345_write(sd, 0x09, input & 0xf); cs5345_write(sd, 0x05, input & 0xf0); return 0; } static int cs5345_s_ctrl(struct v4l2_ctrl *ctrl) { struct v4l2_subdev *sd = to_sd(ctrl); switch (ctrl->id) { case V4L2_CID_AUDIO_MUTE: cs5345_write(sd, 0x04, ctrl->val ? 0x80 : 0); return 0; case V4L2_CID_AUDIO_VOLUME: cs5345_write(sd, 0x07, ((u8)ctrl->val) & 0x3f); cs5345_write(sd, 0x08, ((u8)ctrl->val) & 0x3f); return 0; } return -EINVAL; } #ifdef CONFIG_VIDEO_ADV_DEBUG static int cs5345_g_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); if (!v4l2_chip_match_i2c_client(client, ®->match)) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; reg->size = 1; reg->val = cs5345_read(sd, reg->reg & 0x1f); return 0; } static int cs5345_s_register(struct v4l2_subdev *sd, struct v4l2_dbg_register *reg) { struct i2c_client *client = v4l2_get_subdevdata(sd); if (!v4l2_chip_match_i2c_client(client, ®->match)) return -EINVAL; if (!capable(CAP_SYS_ADMIN)) return -EPERM; cs5345_write(sd, reg->reg & 0x1f, reg->val & 0xff); return 0; } #endif static int cs5345_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip) { struct i2c_client *client = v4l2_get_subdevdata(sd); return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_CS5345, 0); } static int cs5345_log_status(struct v4l2_subdev *sd) { u8 v = cs5345_read(sd, 0x09) & 7; u8 m = cs5345_read(sd, 0x04); int vol = cs5345_read(sd, 0x08) & 0x3f; v4l2_info(sd, "Input: %d%s\n", v, (m & 0x80) ? " (muted)" : ""); if (vol >= 32) vol = vol - 64; v4l2_info(sd, "Volume: %d dB\n", vol); return 0; } /* ----------------------------------------------------------------------- */ static const struct v4l2_ctrl_ops cs5345_ctrl_ops = { .s_ctrl = cs5345_s_ctrl, }; static const struct v4l2_subdev_core_ops cs5345_core_ops = { .log_status = cs5345_log_status, .g_chip_ident = cs5345_g_chip_ident, .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, .g_ctrl = v4l2_subdev_g_ctrl, .s_ctrl = v4l2_subdev_s_ctrl, .queryctrl = v4l2_subdev_queryctrl, .querymenu = v4l2_subdev_querymenu, #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = cs5345_g_register, .s_register = cs5345_s_register, #endif }; static const struct v4l2_subdev_audio_ops cs5345_audio_ops = { .s_routing = cs5345_s_routing, }; static const struct v4l2_subdev_ops cs5345_ops = { .core = &cs5345_core_ops, .audio = &cs5345_audio_ops, }; /* ----------------------------------------------------------------------- */ static int cs5345_probe(struct i2c_client *client, const struct i2c_device_id *id) { struct cs5345_state *state; struct v4l2_subdev *sd; /* 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); state = kzalloc(sizeof(struct cs5345_state), GFP_KERNEL); if (state == NULL) return -ENOMEM; sd = &state->sd; v4l2_i2c_subdev_init(sd, client, &cs5345_ops); v4l2_ctrl_handler_init(&state->hdl, 2); v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); v4l2_ctrl_new_std(&state->hdl, &cs5345_ctrl_ops, V4L2_CID_AUDIO_VOLUME, -24, 24, 1, 0); sd->ctrl_handler = &state->hdl; if (state->hdl.error) { int err = state->hdl.error; v4l2_ctrl_handler_free(&state->hdl); kfree(state); return err; } /* set volume/mute */ v4l2_ctrl_handler_setup(&state->hdl); cs5345_write(sd, 0x02, 0x00); cs5345_write(sd, 0x04, 0x01); cs5345_write(sd, 0x09, 0x01); return 0; } /* ----------------------------------------------------------------------- */ static int cs5345_remove(struct i2c_client *client) { struct v4l2_subdev *sd = i2c_get_clientdata(client); struct cs5345_state *state = to_state(sd); v4l2_device_unregister_subdev(sd); v4l2_ctrl_handler_free(&state->hdl); kfree(state); return 0; } /* ----------------------------------------------------------------------- */ static const struct i2c_device_id cs5345_id[] = { { "cs5345", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, cs5345_id); static struct i2c_driver cs5345_driver = { .driver = { .owner = THIS_MODULE, .name = "cs5345", }, .probe = cs5345_probe, .remove = cs5345_remove, .id_table = cs5345_id, }; static __init int init_cs5345(void) { return i2c_add_driver(&cs5345_driver); } static __exit void exit_cs5345(void) { i2c_del_driver(&cs5345_driver); } module_init(init_cs5345); module_exit(exit_cs5345);