1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Load Analog Devices SigmaStudio firmware files
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright 2009-2011 Analog Devices Inc.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/export.h>
9*4882a593Smuzhiyun #include <linux/i2c.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/slab.h>
12*4882a593Smuzhiyun #include <asm/unaligned.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #include "sigmadsp.h"
15*4882a593Smuzhiyun
sigmadsp_write_i2c(void * control_data,unsigned int addr,const uint8_t data[],size_t len)16*4882a593Smuzhiyun static int sigmadsp_write_i2c(void *control_data,
17*4882a593Smuzhiyun unsigned int addr, const uint8_t data[], size_t len)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun uint8_t *buf;
20*4882a593Smuzhiyun int ret;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun buf = kzalloc(2 + len, GFP_KERNEL | GFP_DMA);
23*4882a593Smuzhiyun if (!buf)
24*4882a593Smuzhiyun return -ENOMEM;
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun put_unaligned_be16(addr, buf);
27*4882a593Smuzhiyun memcpy(buf + 2, data, len);
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun ret = i2c_master_send(control_data, buf, len + 2);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun kfree(buf);
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun if (ret < 0)
34*4882a593Smuzhiyun return ret;
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun return 0;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
sigmadsp_read_i2c(void * control_data,unsigned int addr,uint8_t data[],size_t len)39*4882a593Smuzhiyun static int sigmadsp_read_i2c(void *control_data,
40*4882a593Smuzhiyun unsigned int addr, uint8_t data[], size_t len)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun struct i2c_client *client = control_data;
43*4882a593Smuzhiyun struct i2c_msg msgs[2];
44*4882a593Smuzhiyun uint8_t buf[2];
45*4882a593Smuzhiyun int ret;
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun put_unaligned_be16(addr, buf);
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun msgs[0].addr = client->addr;
50*4882a593Smuzhiyun msgs[0].len = sizeof(buf);
51*4882a593Smuzhiyun msgs[0].buf = buf;
52*4882a593Smuzhiyun msgs[0].flags = 0;
53*4882a593Smuzhiyun
54*4882a593Smuzhiyun msgs[1].addr = client->addr;
55*4882a593Smuzhiyun msgs[1].len = len;
56*4882a593Smuzhiyun msgs[1].buf = data;
57*4882a593Smuzhiyun msgs[1].flags = I2C_M_RD;
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
60*4882a593Smuzhiyun if (ret < 0)
61*4882a593Smuzhiyun return ret;
62*4882a593Smuzhiyun else if (ret != ARRAY_SIZE(msgs))
63*4882a593Smuzhiyun return -EIO;
64*4882a593Smuzhiyun return 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun /**
68*4882a593Smuzhiyun * devm_sigmadsp_init_i2c() - Initialize SigmaDSP instance
69*4882a593Smuzhiyun * @client: The parent I2C device
70*4882a593Smuzhiyun * @ops: The sigmadsp_ops to use for this instance
71*4882a593Smuzhiyun * @firmware_name: Name of the firmware file to load
72*4882a593Smuzhiyun *
73*4882a593Smuzhiyun * Allocates a SigmaDSP instance and loads the specified firmware file.
74*4882a593Smuzhiyun *
75*4882a593Smuzhiyun * Returns a pointer to a struct sigmadsp on success, or a PTR_ERR() on error.
76*4882a593Smuzhiyun */
devm_sigmadsp_init_i2c(struct i2c_client * client,const struct sigmadsp_ops * ops,const char * firmware_name)77*4882a593Smuzhiyun struct sigmadsp *devm_sigmadsp_init_i2c(struct i2c_client *client,
78*4882a593Smuzhiyun const struct sigmadsp_ops *ops, const char *firmware_name)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun struct sigmadsp *sigmadsp;
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun sigmadsp = devm_sigmadsp_init(&client->dev, ops, firmware_name);
83*4882a593Smuzhiyun if (IS_ERR(sigmadsp))
84*4882a593Smuzhiyun return sigmadsp;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun sigmadsp->control_data = client;
87*4882a593Smuzhiyun sigmadsp->write = sigmadsp_write_i2c;
88*4882a593Smuzhiyun sigmadsp->read = sigmadsp_read_i2c;
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun return sigmadsp;
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun EXPORT_SYMBOL_GPL(devm_sigmadsp_init_i2c);
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
95*4882a593Smuzhiyun MODULE_DESCRIPTION("SigmaDSP I2C firmware loader");
96*4882a593Smuzhiyun MODULE_LICENSE("GPL");
97