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a35daac77a
This patch adds support for the v2 version of the SigmaDSP firmware file format. The new format has support for having different program and parameter settings for different samplerates. In addition it stores metadata describing the firmware. This metadata includes the set of supported samplerates which will be used to restrict the samplerates that can be selected by userspace. Also included is information about the modifiable parameters. Those will be exposed as ALSA controls so they can be changed at runtime. The new format is based on a binary type-length-value structure that makes it both forward and backwards compatible. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Mark Brown <broonie@kernel.org>
94 lines
2.1 KiB
C
94 lines
2.1 KiB
C
/*
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* Load Analog Devices SigmaStudio firmware files
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*
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* Copyright 2009-2011 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#include <linux/export.h>
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <asm/unaligned.h>
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#include "sigmadsp.h"
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static int sigmadsp_write_i2c(void *control_data,
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unsigned int addr, const uint8_t data[], size_t len)
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{
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uint8_t *buf;
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int ret;
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buf = kzalloc(2 + len, GFP_KERNEL | GFP_DMA);
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if (!buf)
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return -ENOMEM;
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put_unaligned_be16(addr, buf);
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memcpy(buf + 2, data, len);
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ret = i2c_master_send(control_data, buf, len + 2);
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kfree(buf);
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return ret;
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}
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static int sigmadsp_read_i2c(void *control_data,
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unsigned int addr, uint8_t data[], size_t len)
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{
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struct i2c_client *client = control_data;
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struct i2c_msg msgs[2];
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uint8_t buf[2];
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int ret;
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put_unaligned_be16(addr, buf);
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msgs[0].addr = client->addr;
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msgs[0].len = sizeof(buf);
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msgs[0].buf = buf;
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msgs[0].flags = 0;
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msgs[1].addr = client->addr;
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msgs[1].len = len;
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msgs[1].buf = data;
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msgs[1].flags = I2C_M_RD;
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ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
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if (ret < 0)
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return ret;
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else if (ret != ARRAY_SIZE(msgs))
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return -EIO;
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return 0;
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}
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/**
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* devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance
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* @client: The parent I2C device
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* @ops: The sigmadsp_ops to use for this instance
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* @firmware_name: Name of the firmware file to load
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*
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* Allocates a SigmaDSP instance and loads the specified firmware file.
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*
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* Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error.
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*/
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struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client,
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const struct sigmadsp_ops *ops, const char *firmware_name)
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{
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struct sigmadsp *sigmadsp;
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sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name);
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if (IS_ERR(sigmadsp))
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return sigmadsp;
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sigmadsp->control_data = client;
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sigmadsp->write = sigmadsp_write_i2c;
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sigmadsp->read = sigmadsp_read_i2c;
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return sigmadsp;
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}
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EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c);
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MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
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MODULE_DESCRIPTION("SigmaDSP I2C firmware loader");
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MODULE_LICENSE("GPL");
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