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218 lines
5.3 KiB
218 lines
5.3 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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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#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 <linux/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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strscpy(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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