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