2 * Load Analog Devices SigmaStudio firmware files
4 * Copyright 2009-2011 Analog Devices Inc.
6 * Licensed under the GPL-2 or later.
9 #include <linux/export.h>
10 #include <linux/i2c.h>
11 #include <linux/module.h>
12 #include <linux/slab.h>
13 #include <asm/unaligned.h>
17 static int sigmadsp_write_i2c(void *control_data,
18 unsigned int addr, const uint8_t data[], size_t len)
23 buf = kzalloc(2 + len, GFP_KERNEL | GFP_DMA);
27 put_unaligned_be16(addr, buf);
28 memcpy(buf + 2, data, len);
30 ret = i2c_master_send(control_data, buf, len + 2);
37 static int sigmadsp_read_i2c(void *control_data,
38 unsigned int addr, uint8_t data[], size_t len)
40 struct i2c_client *client = control_data;
41 struct i2c_msg msgs[2];
45 put_unaligned_be16(addr, buf);
47 msgs[0].addr = client->addr;
48 msgs[0].len = sizeof(buf);
52 msgs[1].addr = client->addr;
55 msgs[1].flags = I2C_M_RD;
57 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
60 else if (ret != ARRAY_SIZE(msgs))
66 * devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance
67 * @client: The parent I2C device
68 * @ops: The sigmadsp_ops to use for this instance
69 * @firmware_name: Name of the firmware file to load
71 * Allocates a SigmaDSP instance and loads the specified firmware file.
73 * Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error.
75 struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client,
76 const struct sigmadsp_ops *ops, const char *firmware_name)
78 struct sigmadsp *sigmadsp;
80 sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name);
84 sigmadsp->control_data = client;
85 sigmadsp->write = sigmadsp_write_i2c;
86 sigmadsp->read = sigmadsp_read_i2c;
90 EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c);
92 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
93 MODULE_DESCRIPTION("SigmaDSP I2C firmware loader");
94 MODULE_LICENSE("GPL");