1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * Copyright (c) 2014 Google, Inc
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * SPDX-License-Identifier: GPL-2.0+
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #include <common.h>
8*4882a593Smuzhiyun #include <linux/err.h>
9*4882a593Smuzhiyun #include <dm.h>
10*4882a593Smuzhiyun #include <i2c.h>
11*4882a593Smuzhiyun #include <i2c_eeprom.h>
12*4882a593Smuzhiyun
i2c_eeprom_read(struct udevice * dev,int offset,uint8_t * buf,int size)13*4882a593Smuzhiyun int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
14*4882a593Smuzhiyun {
15*4882a593Smuzhiyun const struct i2c_eeprom_ops *ops = device_get_ops(dev);
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun if (!ops->read)
18*4882a593Smuzhiyun return -ENOSYS;
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun return ops->read(dev, offset, buf, size);
21*4882a593Smuzhiyun }
22*4882a593Smuzhiyun
i2c_eeprom_write(struct udevice * dev,int offset,uint8_t * buf,int size)23*4882a593Smuzhiyun int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
24*4882a593Smuzhiyun {
25*4882a593Smuzhiyun const struct i2c_eeprom_ops *ops = device_get_ops(dev);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (!ops->write)
28*4882a593Smuzhiyun return -ENOSYS;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun return ops->write(dev, offset, buf, size);
31*4882a593Smuzhiyun }
32*4882a593Smuzhiyun
i2c_eeprom_std_read(struct udevice * dev,int offset,uint8_t * buf,int size)33*4882a593Smuzhiyun static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
34*4882a593Smuzhiyun int size)
35*4882a593Smuzhiyun {
36*4882a593Smuzhiyun return dm_i2c_read(dev, offset, buf, size);
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
i2c_eeprom_std_write(struct udevice * dev,int offset,const uint8_t * buf,int size)39*4882a593Smuzhiyun static int i2c_eeprom_std_write(struct udevice *dev, int offset,
40*4882a593Smuzhiyun const uint8_t *buf, int size)
41*4882a593Smuzhiyun {
42*4882a593Smuzhiyun return -ENODEV;
43*4882a593Smuzhiyun }
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
46*4882a593Smuzhiyun .read = i2c_eeprom_std_read,
47*4882a593Smuzhiyun .write = i2c_eeprom_std_write,
48*4882a593Smuzhiyun };
49*4882a593Smuzhiyun
i2c_eeprom_std_ofdata_to_platdata(struct udevice * dev)50*4882a593Smuzhiyun static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
51*4882a593Smuzhiyun {
52*4882a593Smuzhiyun struct i2c_eeprom *priv = dev_get_priv(dev);
53*4882a593Smuzhiyun u64 data = dev_get_driver_data(dev);
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun /* 6 bit -> page size of up to 2^63 (should be sufficient) */
56*4882a593Smuzhiyun priv->pagewidth = data & 0x3F;
57*4882a593Smuzhiyun priv->pagesize = (1 << priv->pagewidth);
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun return 0;
60*4882a593Smuzhiyun }
61*4882a593Smuzhiyun
i2c_eeprom_std_probe(struct udevice * dev)62*4882a593Smuzhiyun static int i2c_eeprom_std_probe(struct udevice *dev)
63*4882a593Smuzhiyun {
64*4882a593Smuzhiyun return 0;
65*4882a593Smuzhiyun }
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun static const struct udevice_id i2c_eeprom_std_ids[] = {
68*4882a593Smuzhiyun { .compatible = "i2c-eeprom", .data = 0 },
69*4882a593Smuzhiyun { .compatible = "atmel,24c01a", .data = 3 },
70*4882a593Smuzhiyun { .compatible = "atmel,24c02", .data = 3 },
71*4882a593Smuzhiyun { .compatible = "atmel,24c04", .data = 4 },
72*4882a593Smuzhiyun { .compatible = "atmel,24c08a", .data = 4 },
73*4882a593Smuzhiyun { .compatible = "atmel,24c16a", .data = 4 },
74*4882a593Smuzhiyun { .compatible = "atmel,24c32", .data = 5 },
75*4882a593Smuzhiyun { .compatible = "atmel,24c64", .data = 5 },
76*4882a593Smuzhiyun { .compatible = "atmel,24c128", .data = 6 },
77*4882a593Smuzhiyun { .compatible = "atmel,24c256", .data = 6 },
78*4882a593Smuzhiyun { .compatible = "atmel,24c512", .data = 6 },
79*4882a593Smuzhiyun { }
80*4882a593Smuzhiyun };
81*4882a593Smuzhiyun
82*4882a593Smuzhiyun U_BOOT_DRIVER(i2c_eeprom_std) = {
83*4882a593Smuzhiyun .name = "i2c_eeprom",
84*4882a593Smuzhiyun .id = UCLASS_I2C_EEPROM,
85*4882a593Smuzhiyun .of_match = i2c_eeprom_std_ids,
86*4882a593Smuzhiyun .probe = i2c_eeprom_std_probe,
87*4882a593Smuzhiyun .ofdata_to_platdata = i2c_eeprom_std_ofdata_to_platdata,
88*4882a593Smuzhiyun .priv_auto_alloc_size = sizeof(struct i2c_eeprom),
89*4882a593Smuzhiyun .ops = &i2c_eeprom_std_ops,
90*4882a593Smuzhiyun };
91*4882a593Smuzhiyun
92*4882a593Smuzhiyun UCLASS_DRIVER(i2c_eeprom) = {
93*4882a593Smuzhiyun .id = UCLASS_I2C_EEPROM,
94*4882a593Smuzhiyun .name = "i2c_eeprom",
95*4882a593Smuzhiyun };
96