/*
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* Driver for CX2081X voice capture IC.
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*
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* Copyright: Conexant Systems.
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/ioport.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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#include <linux/pm.h>
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#include <linux/pm_runtime.h>
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#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/timer.h>
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#include <linux/jiffies.h>
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#include <linux/delay.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/of_gpio.h>
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#include <linux/gpio.h>
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#include "cx20810_config.h"
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static int i2c_send_array(struct i2c_client *client,
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const char *buf, int length)
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{
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int i, nwrite;
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struct device *dev = &client->dev;
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for (i = 0; i < (length / 2); i++) {
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nwrite = i2c_master_send(client, buf + i * 2, 2);
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if (nwrite != 2) {
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dev_err(dev, "i2c send configs error!/n");
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return -1;
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}
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}
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return 0;
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}
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static int cx20810_set_mode(struct device *dev, int mode, int index)
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{
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struct i2c_client *client = to_i2c_client(dev);
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int ret;
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char *param;
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int length;
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switch (mode) {
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case CX20810_NORMAL_MODE:
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param = codec_config_param_normal_mode;
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length = sizeof(codec_config_param_normal_mode);
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break;
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case CX20810_NORMAL_MODE2:
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param = codec_config_param_normal_mode2;
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length = sizeof(codec_config_param_normal_mode2);
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break;
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case CX20810_NORMAL_MODE_SIMPLE:
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param = codec_config_param_normal_mode_simple;
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length = sizeof(codec_config_param_normal_mode_simple);
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break;
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case CX20810_48K_16BIT_MODE:
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param = codec_config_param_48k_16bit_mode;
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length = sizeof(codec_config_param_48k_16bit_mode);
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break;
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case CX20810_96K_16BIT_MODE:
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param = codec_config_param_96k_16bit_mode;
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length = sizeof(codec_config_param_96k_16bit_mode);
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break;
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case CX20810_NIRMAL_MODE_CODEC3:
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param = codec3_config_param_normal_mode;
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length = sizeof(codec3_config_param_normal_mode);
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break;
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case CX20810_NIRMAL_MODE_CODEC3_SIMPLE:
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param = codec3_config_param_normal_mode_simple;
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length = sizeof(codec3_config_param_normal_mode_simple);
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break;
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default:
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dev_err(dev, "Illegal mode.\n");
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return 0;
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}
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ret = i2c_send_array(client, param, length);
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if (ret != 0) {
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dev_err(dev, "cx2081x send configs failed!\n");
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return -1;
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}
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return 0;
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}
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/* initial cx20810 */
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static void cx20810_init(struct device *dev, int index, int mode)
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{
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if (cx20810_set_mode(dev, mode, index) < 0)
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dev_err(dev, "cx20810 set mode fail.\n");
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}
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static const struct of_device_id of_cx2081x_match[] = {
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{ .compatible = "conexant,cx20810" },
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{ .compatible = "conexant,cx20811" },
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{},
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};
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MODULE_DEVICE_TABLE(of, of_cx2081x_match);
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static int cx2081x_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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const struct of_device_id *match;
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struct device *dev = &client->dev;
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struct gpio_desc *reset_gpio;
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if (dev->of_node) {
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match = of_match_device(of_cx2081x_match, dev);
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if (!match) {
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dev_err(dev, "Failed to find matching dt id\n");
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return -EINVAL;
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}
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}
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reset_gpio = gpiod_get_optional(dev,
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"reset", GPIOD_OUT_LOW);
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if (IS_ERR(reset_gpio)) {
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int error = PTR_ERR(reset_gpio);
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dev_err(dev, "Failed to request RESET gpio: %d\n", error);
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} else {
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gpiod_set_value(reset_gpio, 0);
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mdelay(10);
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gpiod_set_value(reset_gpio, 1);
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/*
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* we found there are possibilities download configs through
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* i2c failed, some delay can fix it.
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*/
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mdelay(10);
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}
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cx20810_init(dev, 0, CX20810_NORMAL_MODE);
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if (!IS_ERR(reset_gpio))
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gpiod_put(reset_gpio);
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return 0;
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}
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static const struct i2c_device_id cx2081x_id[] = {
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{"cx20810"},
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{"cx20811"},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, cx20810_id);
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static struct i2c_driver cx2081x_driver = {
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.driver = {
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.name = "cx2081x",
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.of_match_table = of_cx2081x_match,
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},
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.probe = cx2081x_probe,
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.id_table = cx2081x_id,
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};
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module_i2c_driver(cx2081x_driver);
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MODULE_AUTHOR("Timothy");
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MODULE_DESCRIPTION("I2C device cx20810 loader");
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MODULE_LICENSE("GPL");
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