97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
|
|
/*
|
|
* Load Analog Devices SigmaStudio firmware files
|
|
*
|
|
* Copyright 2009-2011 Analog Devices Inc.
|
|
*/
|
|
|
|
#include <linux/export.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/slab.h>
|
|
#include <asm/unaligned.h>
|
|
|
|
#include "sigmadsp.h"
|
|
|
|
static int sigmadsp_write_i2c(void *control_data,
|
|
unsigned int addr, const uint8_t data[], size_t len)
|
|
{
|
|
uint8_t *buf;
|
|
int ret;
|
|
|
|
buf = kzalloc(2 + len, GFP_KERNEL | GFP_DMA);
|
|
if (!buf)
|
|
return -ENOMEM;
|
|
|
|
put_unaligned_be16(addr, buf);
|
|
memcpy(buf + 2, data, len);
|
|
|
|
ret = i2c_master_send(control_data, buf, len + 2);
|
|
|
|
kfree(buf);
|
|
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int sigmadsp_read_i2c(void *control_data,
|
|
unsigned int addr, uint8_t data[], size_t len)
|
|
{
|
|
struct i2c_client *client = control_data;
|
|
struct i2c_msg msgs[2];
|
|
uint8_t buf[2];
|
|
int ret;
|
|
|
|
put_unaligned_be16(addr, buf);
|
|
|
|
msgs[0].addr = client->addr;
|
|
msgs[0].len = sizeof(buf);
|
|
msgs[0].buf = buf;
|
|
msgs[0].flags = 0;
|
|
|
|
msgs[1].addr = client->addr;
|
|
msgs[1].len = len;
|
|
msgs[1].buf = data;
|
|
msgs[1].flags = I2C_M_RD;
|
|
|
|
ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
|
|
if (ret < 0)
|
|
return ret;
|
|
else if (ret != ARRAY_SIZE(msgs))
|
|
return -EIO;
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance
|
|
* @client: The parent I2C device
|
|
* @ops: The sigmadsp_ops to use for this instance
|
|
* @firmware_name: Name of the firmware file to load
|
|
*
|
|
* Allocates a SigmaDSP instance and loads the specified firmware file.
|
|
*
|
|
* Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error.
|
|
*/
|
|
struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client,
|
|
const struct sigmadsp_ops *ops, const char *firmware_name)
|
|
{
|
|
struct sigmadsp *sigmadsp;
|
|
|
|
sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name);
|
|
if (IS_ERR(sigmadsp))
|
|
return sigmadsp;
|
|
|
|
sigmadsp->control_data = client;
|
|
sigmadsp->write = sigmadsp_write_i2c;
|
|
sigmadsp->read = sigmadsp_read_i2c;
|
|
|
|
return sigmadsp;
|
|
}
|
|
EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c);
|
|
|
|
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
|
|
MODULE_DESCRIPTION("SigmaDSP I2C firmware loader");
|
|
MODULE_LICENSE("GPL");
|