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);
40 static int sigmadsp_read_i2c(void *control_data,
41 unsigned int addr, uint8_t data[], size_t len)
43 struct i2c_client *client = control_data;
44 struct i2c_msg msgs[2];
48 put_unaligned_be16(addr, buf);
50 msgs[0].addr = client->addr;
51 msgs[0].len = sizeof(buf);
55 msgs[1].addr = client->addr;
58 msgs[1].flags = I2C_M_RD;
60 ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
63 else if (ret != ARRAY_SIZE(msgs))
69 * devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance
70 * @client: The parent I2C device
71 * @ops: The sigmadsp_ops to use for this instance
72 * @firmware_name: Name of the firmware file to load
74 * Allocates a SigmaDSP instance and loads the specified firmware file.
76 * Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error.
78 struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client,
79 const struct sigmadsp_ops *ops, const char *firmware_name)
81 struct sigmadsp *sigmadsp;
83 sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name);
87 sigmadsp->control_data = client;
88 sigmadsp->write = sigmadsp_write_i2c;
89 sigmadsp->read = sigmadsp_read_i2c;
93 EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c);
95 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
96 MODULE_DESCRIPTION("SigmaDSP I2C firmware loader");
97 MODULE_LICENSE("GPL");