98 lines
2.4 KiB
C
98 lines
2.4 KiB
C
/*
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* Copyright (c) 2014 Google, Inc
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <linux/err.h>
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#include <dm.h>
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#include <i2c.h>
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#include <i2c_eeprom.h>
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int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
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{
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const struct i2c_eeprom_ops *ops = device_get_ops(dev);
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if (!ops->read)
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return -ENOSYS;
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return ops->read(dev, offset, buf, size);
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}
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int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
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{
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const struct i2c_eeprom_ops *ops = device_get_ops(dev);
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if (!ops->write)
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return -ENOSYS;
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return ops->write(dev, offset, buf, size);
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}
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static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
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int size)
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{
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return dm_i2c_read(dev, offset, buf, size);
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}
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static int i2c_eeprom_std_write(struct udevice *dev, int offset,
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const uint8_t *buf, int size)
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{
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return -ENODEV;
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}
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static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
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.read = i2c_eeprom_std_read,
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.write = i2c_eeprom_std_write,
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};
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static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
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{
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struct i2c_eeprom *priv = dev_get_priv(dev);
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u64 data = dev_get_driver_data(dev);
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/* 6 bit -> page size of up to 2^63 (should be sufficient) */
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priv->pagewidth = data & 0x3F;
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priv->pagesize = (1 << priv->pagewidth);
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return 0;
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}
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static int i2c_eeprom_std_probe(struct udevice *dev)
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{
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return 0;
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}
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static const struct udevice_id i2c_eeprom_std_ids[] = {
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{ .compatible = "i2c-eeprom", .data = 0 },
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{ .compatible = "microchip,24aa02e48", .data = 3 },
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{ .compatible = "atmel,24c01a", .data = 3 },
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{ .compatible = "atmel,24c02", .data = 3 },
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{ .compatible = "atmel,24c04", .data = 4 },
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{ .compatible = "atmel,24c08a", .data = 4 },
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{ .compatible = "atmel,24c16a", .data = 4 },
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{ .compatible = "atmel,24mac402", .data = 4 },
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{ .compatible = "atmel,24c32", .data = 5 },
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{ .compatible = "atmel,24c64", .data = 5 },
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{ .compatible = "atmel,24c128", .data = 6 },
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{ .compatible = "atmel,24c256", .data = 6 },
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{ .compatible = "atmel,24c512", .data = 6 },
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{ }
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};
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U_BOOT_DRIVER(i2c_eeprom_std) = {
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.name = "i2c_eeprom",
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.id = UCLASS_I2C_EEPROM,
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.of_match = i2c_eeprom_std_ids,
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.probe = i2c_eeprom_std_probe,
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.ofdata_to_platdata = i2c_eeprom_std_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct i2c_eeprom),
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.ops = &i2c_eeprom_std_ops,
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};
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UCLASS_DRIVER(i2c_eeprom) = {
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.id = UCLASS_I2C_EEPROM,
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.name = "i2c_eeprom",
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};
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