diff options
Diffstat (limited to 'drivers/media/i2c/cs53l32a.c')
| -rw-r--r-- | drivers/media/i2c/cs53l32a.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/media/i2c/cs53l32a.c b/drivers/media/i2c/cs53l32a.c new file mode 100644 index 000000000..9461589ae --- /dev/null +++ b/drivers/media/i2c/cs53l32a.c @@ -0,0 +1,217 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver. + * Copyright (C) 2005 Martin Vaughan + * + * Audio source switching for Adaptec AVC-2410 added by Trev Jackson + */ + + +#include <linux/module.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/ioctl.h> +#include <linux/uaccess.h> +#include <linux/i2c.h> +#include <linux/videodev2.h> +#include <media/v4l2-device.h> +#include <media/v4l2-ctrls.h> + +MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC"); +MODULE_AUTHOR("Martin Vaughan"); +MODULE_LICENSE("GPL"); + +static bool debug; + +module_param(debug, bool, 0644); + +MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On"); + + +struct cs53l32a_state { + struct v4l2_subdev sd; + struct v4l2_ctrl_handler hdl; +}; + +static inline struct cs53l32a_state *to_state(struct v4l2_subdev *sd) +{ + return container_of(sd, struct cs53l32a_state, sd); +} + +static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) +{ + return &container_of(ctrl->handler, struct cs53l32a_state, hdl)->sd; +} + +/* ----------------------------------------------------------------------- */ + +static int cs53l32a_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 int cs53l32a_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 cs53l32a_s_routing(struct v4l2_subdev *sd, + u32 input, u32 output, u32 config) +{ + /* There are 2 physical inputs, but the second input can be + placed in two modes, the first mode bypasses the PGA (gain), + the second goes through the PGA. Hence there are three + possible inputs to choose from. */ + if (input > 2) { + v4l2_err(sd, "Invalid input %d.\n", input); + return -EINVAL; + } + cs53l32a_write(sd, 0x01, 0x01 + (input << 4)); + return 0; +} + +static int cs53l32a_s_ctrl(struct v4l2_ctrl *ctrl) +{ + struct v4l2_subdev *sd = to_sd(ctrl); + + switch (ctrl->id) { + case V4L2_CID_AUDIO_MUTE: + cs53l32a_write(sd, 0x03, ctrl->val ? 0xf0 : 0x30); + return 0; + case V4L2_CID_AUDIO_VOLUME: + cs53l32a_write(sd, 0x04, (u8)ctrl->val); + cs53l32a_write(sd, 0x05, (u8)ctrl->val); + return 0; + } + return -EINVAL; +} + +static int cs53l32a_log_status(struct v4l2_subdev *sd) +{ + struct cs53l32a_state *state = to_state(sd); + u8 v = cs53l32a_read(sd, 0x01); + + v4l2_info(sd, "Input: %d\n", (v >> 4) & 3); + v4l2_ctrl_handler_log_status(&state->hdl, sd->name); + return 0; +} + +/* ----------------------------------------------------------------------- */ + +static const struct v4l2_ctrl_ops cs53l32a_ctrl_ops = { + .s_ctrl = cs53l32a_s_ctrl, +}; + +static const struct v4l2_subdev_core_ops cs53l32a_core_ops = { + .log_status = cs53l32a_log_status, +}; + +static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = { + .s_routing = cs53l32a_s_routing, +}; + +static const struct v4l2_subdev_ops cs53l32a_ops = { + .core = &cs53l32a_core_ops, + .audio = &cs53l32a_audio_ops, +}; + +/* ----------------------------------------------------------------------- */ + +/* i2c implementation */ + +/* + * Generic i2c probe + * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' + */ + +static int cs53l32a_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct cs53l32a_state *state; + struct v4l2_subdev *sd; + int i; + + /* Check if the adapter supports the needed features */ + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) + return -EIO; + + if (!id) + strscpy(client->name, "cs53l32a", sizeof(client->name)); + + v4l_info(client, "chip found @ 0x%x (%s)\n", + client->addr << 1, client->adapter->name); + + state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); + if (state == NULL) + return -ENOMEM; + sd = &state->sd; + v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops); + + for (i = 1; i <= 7; i++) { + u8 v = cs53l32a_read(sd, i); + + v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v); + } + + v4l2_ctrl_handler_init(&state->hdl, 2); + v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops, + V4L2_CID_AUDIO_VOLUME, -96, 12, 1, 0); + v4l2_ctrl_new_std(&state->hdl, &cs53l32a_ctrl_ops, + V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); + sd->ctrl_handler = &state->hdl; + if (state->hdl.error) { + int err = state->hdl.error; + + v4l2_ctrl_handler_free(&state->hdl); + return err; + } + + /* Set cs53l32a internal register for Adaptec 2010/2410 setup */ + + cs53l32a_write(sd, 0x01, 0x21); + cs53l32a_write(sd, 0x02, 0x29); + cs53l32a_write(sd, 0x03, 0x30); + cs53l32a_write(sd, 0x04, 0x00); + cs53l32a_write(sd, 0x05, 0x00); + cs53l32a_write(sd, 0x06, 0x00); + cs53l32a_write(sd, 0x07, 0x00); + + /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */ + + for (i = 1; i <= 7; i++) { + u8 v = cs53l32a_read(sd, i); + + v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v); + } + return 0; +} + +static void cs53l32a_remove(struct i2c_client *client) +{ + struct v4l2_subdev *sd = i2c_get_clientdata(client); + struct cs53l32a_state *state = to_state(sd); + + v4l2_device_unregister_subdev(sd); + v4l2_ctrl_handler_free(&state->hdl); +} + +static const struct i2c_device_id cs53l32a_id[] = { + { "cs53l32a", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, cs53l32a_id); + +static struct i2c_driver cs53l32a_driver = { + .driver = { + .name = "cs53l32a", + }, + .probe = cs53l32a_probe, + .remove = cs53l32a_remove, + .id_table = cs53l32a_id, +}; + +module_i2c_driver(cs53l32a_driver); |