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/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-11-26 GuEe-GUI first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#define DBG_TAG "mfd.rk8xx-i2c"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include "rk8xx.h"
struct rk8xx_i2c_soc_data
{
int variant;
};
static rt_uint32_t rk8xx_i2c_read(struct rk8xx *rk8xx, rt_uint16_t reg)
{
rt_uint8_t data = 0;
rt_uint8_t send_buf[2];
struct rt_i2c_msg msg[2];
struct rt_i2c_client *client = rk8xx_to_i2c_client(rk8xx);
send_buf[0] = (reg & 0xff);
msg[0].addr = client->client_addr;
msg[0].flags = RT_I2C_WR;
msg[0].len = 1;
msg[0].buf = send_buf;
msg[1].addr = client->client_addr;
msg[1].flags = RT_I2C_RD;
msg[1].len = 1;
msg[1].buf = &data;
if (rt_i2c_transfer(client->bus, msg, 2) == 2)
{
return data;
}
else
{
return (rt_uint32_t)-RT_ERROR;
}
}
static rt_err_t rk8xx_i2c_write(struct rk8xx *rk8xx, rt_uint16_t reg,
rt_uint8_t data)
{
rt_uint8_t send_buf[2];
struct rt_i2c_msg msg;
struct rt_i2c_client *client = rk8xx_to_i2c_client(rk8xx);
send_buf[0] = reg & 0xff;
send_buf[1] = data;
msg.addr = client->client_addr;
msg.flags = RT_I2C_WR;
msg.len = 2;
msg.buf = send_buf;
if (rt_i2c_transfer(client->bus, &msg, 1) == 1)
{
return RT_EOK;
}
else
{
return -RT_ERROR;
}
}
static rt_err_t rk8xx_i2c_update_bits(struct rk8xx *rk8xx, rt_uint16_t reg,
rt_uint8_t mask, rt_uint8_t data)
{
rt_uint32_t old, tmp;
old = rk8xx_i2c_read(rk8xx, reg);
if (old < 0)
{
return old;
}
tmp = old & ~mask;
tmp |= (data & mask);
return rk8xx_i2c_write(rk8xx, reg, tmp);
}
static rt_err_t rk8xx_i2c_probe(struct rt_i2c_client *client)
{
rt_err_t err;
const struct rk8xx_i2c_soc_data *soc_data;
struct rk8xx *rk8xx = rt_calloc(1, sizeof(*rk8xx));
if (!rk8xx)
{
return -RT_ENOMEM;
}
rk8xx->irq = rt_dm_dev_get_irq(&client->parent, 0);
if (rk8xx->irq < 0)
{
err = rk8xx->irq;
goto _fail;
}
soc_data = client->ofw_id->data;
client->parent.user_data = rk8xx;
rk8xx->variant = soc_data->variant;
rk8xx->dev = &client->parent;
rk8xx->read = rk8xx_i2c_read;
rk8xx->write = rk8xx_i2c_write;
rk8xx->update_bits = rk8xx_i2c_update_bits;
if ((err = rk8xx_probe(rk8xx)))
{
goto _fail;
}
return RT_EOK;
_fail:
rt_free(rk8xx);
return err;
}
static rt_err_t rk8xx_i2c_shutdown(struct rt_i2c_client *client)
{
struct rk8xx *rk8xx = client->parent.user_data;
return rk8xx_shutdown(rk8xx);
}
static const struct rk8xx_i2c_soc_data rk805_data =
{
.variant = RK805_ID,
};
static const struct rk8xx_i2c_soc_data rk808_data =
{
.variant = RK808_ID,
};
static const struct rk8xx_i2c_soc_data rk809_data =
{
.variant = RK809_ID,
};
static const struct rk8xx_i2c_soc_data rk817_data =
{
.variant = RK817_ID,
};
static const struct rk8xx_i2c_soc_data rk818_data =
{
.variant = RK818_ID,
};
static const struct rt_ofw_node_id rk8xx_i2c_ofw_ids[] =
{
{ .compatible = "rockchip,rk805", .data = &rk805_data },
{ .compatible = "rockchip,rk808", .data = &rk808_data },
{ .compatible = "rockchip,rk809", .data = &rk809_data },
{ .compatible = "rockchip,rk817", .data = &rk817_data },
{ .compatible = "rockchip,rk818", .data = &rk818_data },
{ /* sentinel */ },
};
static struct rt_i2c_driver rk8xx_i2c_driver =
{
.ofw_ids = rk8xx_i2c_ofw_ids,
.probe = rk8xx_i2c_probe,
.shutdown = rk8xx_i2c_shutdown,
};
RT_I2C_DRIVER_EXPORT(rk8xx_i2c_driver);
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