1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2014 Google, Inc
4 */
5
6 #include <common.h>
7 #include <linux/err.h>
8 #include <dm.h>
9 #include <i2c.h>
10 #include <i2c_eeprom.h>
11
i2c_eeprom_read(struct udevice * dev,int offset,uint8_t * buf,int size)12 int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
13 {
14 const struct i2c_eeprom_ops *ops = device_get_ops(dev);
15
16 if (!ops->read)
17 return -ENOSYS;
18
19 return ops->read(dev, offset, buf, size);
20 }
21
i2c_eeprom_write(struct udevice * dev,int offset,uint8_t * buf,int size)22 int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
23 {
24 const struct i2c_eeprom_ops *ops = device_get_ops(dev);
25
26 if (!ops->write)
27 return -ENOSYS;
28
29 return ops->write(dev, offset, buf, size);
30 }
31
i2c_eeprom_std_read(struct udevice * dev,int offset,uint8_t * buf,int size)32 static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
33 int size)
34 {
35 return dm_i2c_read(dev, offset, buf, size);
36 }
37
i2c_eeprom_std_write(struct udevice * dev,int offset,const uint8_t * buf,int size)38 static int i2c_eeprom_std_write(struct udevice *dev, int offset,
39 const uint8_t *buf, int size)
40 {
41 return -ENODEV;
42 }
43
44 static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
45 .read = i2c_eeprom_std_read,
46 .write = i2c_eeprom_std_write,
47 };
48
i2c_eeprom_std_ofdata_to_platdata(struct udevice * dev)49 static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
50 {
51 struct i2c_eeprom *priv = dev_get_priv(dev);
52 u64 data = dev_get_driver_data(dev);
53
54 /* 6 bit -> page size of up to 2^63 (should be sufficient) */
55 priv->pagewidth = data & 0x3F;
56 priv->pagesize = (1 << priv->pagewidth);
57
58 return 0;
59 }
60
i2c_eeprom_std_probe(struct udevice * dev)61 static int i2c_eeprom_std_probe(struct udevice *dev)
62 {
63 return 0;
64 }
65
66 static const struct udevice_id i2c_eeprom_std_ids[] = {
67 { .compatible = "i2c-eeprom", .data = 0 },
68 { .compatible = "microchip,24aa02e48", .data = 3 },
69 { .compatible = "atmel,24c01a", .data = 3 },
70 { .compatible = "atmel,24c02", .data = 3 },
71 { .compatible = "atmel,24c04", .data = 4 },
72 { .compatible = "atmel,24c08", .data = 4 },
73 { .compatible = "atmel,24c08a", .data = 4 },
74 { .compatible = "atmel,24c16a", .data = 4 },
75 { .compatible = "atmel,24mac402", .data = 4 },
76 { .compatible = "atmel,24c32", .data = 5 },
77 { .compatible = "atmel,24c64", .data = 5 },
78 { .compatible = "atmel,24c128", .data = 6 },
79 { .compatible = "atmel,24c256", .data = 6 },
80 { .compatible = "atmel,24c512", .data = 6 },
81 { }
82 };
83
84 U_BOOT_DRIVER(i2c_eeprom_std) = {
85 .name = "i2c_eeprom",
86 .id = UCLASS_I2C_EEPROM,
87 .of_match = i2c_eeprom_std_ids,
88 .probe = i2c_eeprom_std_probe,
89 .ofdata_to_platdata = i2c_eeprom_std_ofdata_to_platdata,
90 .priv_auto_alloc_size = sizeof(struct i2c_eeprom),
91 .ops = &i2c_eeprom_std_ops,
92 };
93
94 UCLASS_DRIVER(i2c_eeprom) = {
95 .id = UCLASS_I2C_EEPROM,
96 .name = "i2c_eeprom",
97 };
98