[people/ms/u-boot.git] / drivers / misc / i2c_eeprom.c

/*
 * Copyright (c) 2014 Google, Inc
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#include <common.h>
#include <linux/err.h>
#include <dm.h>
#include <i2c.h>
#include <i2c_eeprom.h>

int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
{
	const struct i2c_eeprom_ops *ops = device_get_ops(dev);

	if (!ops->read)
		return -ENOSYS;

	return ops->read(dev, offset, buf, size);
}

int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size)
{
	const struct i2c_eeprom_ops *ops = device_get_ops(dev);

	if (!ops->write)
		return -ENOSYS;

	return ops->write(dev, offset, buf, size);
}

static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
			       int size)
{
	return dm_i2c_read(dev, offset, buf, size);
}

static int i2c_eeprom_std_write(struct udevice *dev, int offset,
				const uint8_t *buf, int size)
{
	return -ENODEV;
}

static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
	.read	= i2c_eeprom_std_read,
	.write	= i2c_eeprom_std_write,
};

static int i2c_eeprom_std_ofdata_to_platdata(struct udevice *dev)
{
	struct i2c_eeprom *priv = dev_get_priv(dev);
	u64 data = dev_get_driver_data(dev);

	/* 6 bit -> page size of up to 2^63 (should be sufficient) */
	priv->pagewidth = data & 0x3F;
	priv->pagesize = (1 << priv->pagewidth);

	return 0;
}

static int i2c_eeprom_std_probe(struct udevice *dev)
{
	return 0;
}

static const struct udevice_id i2c_eeprom_std_ids[] = {
	{ .compatible = "i2c-eeprom", .data = 0 },
	{ .compatible = "microchip,24aa02e48", .data = 3 },
	{ .compatible = "atmel,24c01a", .data = 3 },
	{ .compatible = "atmel,24c02", .data = 3 },
	{ .compatible = "atmel,24c04", .data = 4 },
	{ .compatible = "atmel,24c08a", .data = 4 },
	{ .compatible = "atmel,24c16a", .data = 4 },
	{ .compatible = "atmel,24mac402", .data = 4 },
	{ .compatible = "atmel,24c32", .data = 5 },
	{ .compatible = "atmel,24c64", .data = 5 },
	{ .compatible = "atmel,24c128", .data = 6 },
	{ .compatible = "atmel,24c256", .data = 6 },
	{ .compatible = "atmel,24c512", .data = 6 },
	{ }
};

U_BOOT_DRIVER(i2c_eeprom_std) = {
	.name			= "i2c_eeprom",
	.id			= UCLASS_I2C_EEPROM,
	.of_match		= i2c_eeprom_std_ids,
	.probe			= i2c_eeprom_std_probe,
	.ofdata_to_platdata	= i2c_eeprom_std_ofdata_to_platdata,
	.priv_auto_alloc_size	= sizeof(struct i2c_eeprom),
	.ops			= &i2c_eeprom_std_ops,
};

UCLASS_DRIVER(i2c_eeprom) = {
	.id		= UCLASS_I2C_EEPROM,
	.name		= "i2c_eeprom",
};
Commit	Line	Data
20142019 SG	1	/*
	2	* Copyright (c) 2014 Google, Inc
	3	*
	4	* SPDX-License-Identifier: GPL-2.0+
	5	*/
	6
	7	#include <common.h>
ee5ee876	8	#include <linux/err.h>
20142019 SG	9	#include <dm.h>
	10	#include <i2c.h>
	11	#include <i2c_eeprom.h>
	12
8880efbd JK	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
	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
	33	static int i2c_eeprom_std_read(struct udevice dev, int offset, uint8_t buf,
	34	int size)
20142019	35	{
d7e28918	36	return dm_i2c_read(dev, offset, buf, size);
20142019 SG	37	}
20142019 SG	38
8880efbd JK	39	static int i2c_eeprom_std_write(struct udevice *dev, int offset,
8880efbd JK	40	const uint8_t *buf, int size)
20142019 SG	41	{
	42	return -ENODEV;
	43	}
	44
5e75ea15	45	static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
8880efbd JK	46	.read = i2c_eeprom_std_read,
8880efbd JK	47	.write = i2c_eeprom_std_write,
20142019 SG	48	};
20142019 SG	49
d7e28918	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
5e75ea15	62	static int i2c_eeprom_std_probe(struct udevice *dev)
20142019 SG	63	{
	64	return 0;
	65	}
	66
	67	static const struct udevice_id i2c_eeprom_std_ids[] = {
d7e28918	68	{ .compatible = "i2c-eeprom", .data = 0 },
72640667	69	{ .compatible = "microchip,24aa02e48", .data = 3 },
d7e28918	70	{ .compatible = "atmel,24c01a", .data = 3 },
	71	{ .compatible = "atmel,24c02", .data = 3 },
	72	{ .compatible = "atmel,24c04", .data = 4 },
	73	{ .compatible = "atmel,24c08a", .data = 4 },
	74	{ .compatible = "atmel,24c16a", .data = 4 },
de656752	75	{ .compatible = "atmel,24mac402", .data = 4 },
d7e28918	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 },
20142019 SG	81	{ }
	82	};
	83
	84	U_BOOT_DRIVER(i2c_eeprom_std) = {
d7e28918	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,
20142019 SG	92	};
	93
	94	UCLASS_DRIVER(i2c_eeprom) = {
	95	.id = UCLASS_I2C_EEPROM,
	96	.name = "i2c_eeprom",
	97	};