mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-17 10:18:38 +00:00
c05ed00afb
Move this uncommon header out of the common header. Signed-off-by: Simon Glass <sjg@chromium.org>
369 lines
8.4 KiB
C
369 lines
8.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2014 Google, Inc
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*/
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#include <common.h>
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#include <eeprom.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/kernel.h>
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#include <dm.h>
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#include <dm/device-internal.h>
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#include <i2c.h>
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#include <i2c_eeprom.h>
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struct i2c_eeprom_drv_data {
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u32 size; /* size in bytes */
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u32 pagesize; /* page size in bytes */
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u32 addr_offset_mask; /* bits in addr used for offset overflow */
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u32 offset_len; /* size in bytes of offset */
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};
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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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int i2c_eeprom_size(struct udevice *dev)
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{
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const struct i2c_eeprom_ops *ops = device_get_ops(dev);
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if (!ops->size)
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return -ENOSYS;
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return ops->size(dev);
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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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struct i2c_eeprom *priv = dev_get_priv(dev);
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int ret;
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while (size > 0) {
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int write_size = min_t(int, size, priv->pagesize);
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ret = dm_i2c_write(dev, offset, buf, write_size);
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if (ret)
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return ret;
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offset += write_size;
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buf += write_size;
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size -= write_size;
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udelay(10000);
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}
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return 0;
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}
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static int i2c_eeprom_std_size(struct udevice *dev)
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{
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struct i2c_eeprom *priv = dev_get_priv(dev);
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return priv->size;
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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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.size = i2c_eeprom_std_size,
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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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struct i2c_eeprom_drv_data *data =
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(struct i2c_eeprom_drv_data *)dev_get_driver_data(dev);
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u32 pagesize;
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u32 size;
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if (dev_read_u32(dev, "pagesize", &pagesize) == 0)
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priv->pagesize = pagesize;
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else
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/* 6 bit -> page size of up to 2^63 (should be sufficient) */
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priv->pagesize = data->pagesize;
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if (dev_read_u32(dev, "size", &size) == 0)
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priv->size = size;
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else
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priv->size = data->size;
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return 0;
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}
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static int i2c_eeprom_std_bind(struct udevice *dev)
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{
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ofnode partitions = ofnode_find_subnode(dev_ofnode(dev), "partitions");
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ofnode partition;
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const char *name;
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if (!ofnode_valid(partitions))
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return 0;
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if (!ofnode_device_is_compatible(partitions, "fixed-partitions"))
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return -ENOTSUPP;
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ofnode_for_each_subnode(partition, partitions) {
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name = ofnode_get_name(partition);
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if (!name)
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continue;
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device_bind_ofnode(dev, DM_GET_DRIVER(i2c_eeprom_partition),
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name, NULL, partition, NULL);
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}
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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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u8 test_byte;
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int ret;
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struct i2c_eeprom_drv_data *data =
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(struct i2c_eeprom_drv_data *)dev_get_driver_data(dev);
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i2c_set_chip_offset_len(dev, data->offset_len);
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i2c_set_chip_addr_offset_mask(dev, data->addr_offset_mask);
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/* Verify that the chip is functional */
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ret = i2c_eeprom_read(dev, 0, &test_byte, 1);
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if (ret)
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return -ENODEV;
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return 0;
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}
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static const struct i2c_eeprom_drv_data eeprom_data = {
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.size = 0,
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.pagesize = 1,
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.addr_offset_mask = 0,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data mc24aa02e48_data = {
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.size = 256,
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.pagesize = 8,
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.addr_offset_mask = 0,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c01a_data = {
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.size = 128,
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.pagesize = 8,
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.addr_offset_mask = 0,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c02_data = {
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.size = 256,
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.pagesize = 8,
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.addr_offset_mask = 0,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c04_data = {
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.size = 512,
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.pagesize = 16,
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.addr_offset_mask = 0x1,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c08_data = {
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.size = 1024,
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.pagesize = 16,
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.addr_offset_mask = 0x3,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c08a_data = {
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.size = 1024,
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.pagesize = 16,
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.addr_offset_mask = 0x3,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c16a_data = {
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.size = 2048,
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.pagesize = 16,
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.addr_offset_mask = 0x7,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24mac402_data = {
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.size = 256,
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.pagesize = 16,
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.addr_offset_mask = 0,
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.offset_len = 1,
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};
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static const struct i2c_eeprom_drv_data atmel24c32_data = {
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.size = 4096,
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.pagesize = 32,
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.addr_offset_mask = 0,
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.offset_len = 2,
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};
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static const struct i2c_eeprom_drv_data atmel24c64_data = {
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.size = 8192,
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.pagesize = 32,
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.addr_offset_mask = 0,
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.offset_len = 2,
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};
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static const struct i2c_eeprom_drv_data atmel24c128_data = {
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.size = 16384,
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.pagesize = 64,
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.addr_offset_mask = 0,
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.offset_len = 2,
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};
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static const struct i2c_eeprom_drv_data atmel24c256_data = {
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.size = 32768,
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.pagesize = 64,
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.addr_offset_mask = 0,
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.offset_len = 2,
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};
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static const struct i2c_eeprom_drv_data atmel24c512_data = {
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.size = 65536,
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.pagesize = 64,
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.addr_offset_mask = 0,
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.offset_len = 2,
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};
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static const struct udevice_id i2c_eeprom_std_ids[] = {
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{ .compatible = "i2c-eeprom", (ulong)&eeprom_data },
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{ .compatible = "microchip,24aa02e48", (ulong)&mc24aa02e48_data },
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{ .compatible = "atmel,24c01a", (ulong)&atmel24c01a_data },
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{ .compatible = "atmel,24c02", (ulong)&atmel24c02_data },
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{ .compatible = "atmel,24c04", (ulong)&atmel24c04_data },
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{ .compatible = "atmel,24c08", (ulong)&atmel24c08_data },
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{ .compatible = "atmel,24c08a", (ulong)&atmel24c08a_data },
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{ .compatible = "atmel,24c16a", (ulong)&atmel24c16a_data },
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{ .compatible = "atmel,24mac402", (ulong)&atmel24mac402_data },
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{ .compatible = "atmel,24c32", (ulong)&atmel24c32_data },
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{ .compatible = "atmel,24c64", (ulong)&atmel24c64_data },
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{ .compatible = "atmel,24c128", (ulong)&atmel24c128_data },
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{ .compatible = "atmel,24c256", (ulong)&atmel24c256_data },
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{ .compatible = "atmel,24c512", (ulong)&atmel24c512_data },
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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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.bind = i2c_eeprom_std_bind,
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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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struct i2c_eeprom_partition {
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u32 offset;
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u32 size;
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};
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static int i2c_eeprom_partition_probe(struct udevice *dev)
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{
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return 0;
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}
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static int i2c_eeprom_partition_ofdata_to_platdata(struct udevice *dev)
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{
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struct i2c_eeprom_partition *priv = dev_get_priv(dev);
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u32 offset, size;
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int ret;
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ret = dev_read_u32(dev, "offset", &offset);
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if (ret)
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return ret;
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ret = dev_read_u32(dev, "size", &size);
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if (ret)
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return ret;
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priv->offset = offset;
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priv->size = size;
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return 0;
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}
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static int i2c_eeprom_partition_read(struct udevice *dev, int offset,
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u8 *buf, int size)
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{
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struct i2c_eeprom_partition *priv = dev_get_priv(dev);
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struct udevice *parent = dev_get_parent(dev);
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if (!parent)
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return -ENODEV;
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if (offset + size > priv->size)
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return -EINVAL;
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return i2c_eeprom_read(parent, offset + priv->offset, buf, size);
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}
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static int i2c_eeprom_partition_write(struct udevice *dev, int offset,
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const u8 *buf, int size)
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{
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struct i2c_eeprom_partition *priv = dev_get_priv(dev);
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struct udevice *parent = dev_get_parent(dev);
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if (!parent)
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return -ENODEV;
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if (offset + size > priv->size)
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return -EINVAL;
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return i2c_eeprom_write(parent, offset + priv->offset, (uint8_t *)buf,
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size);
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}
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static int i2c_eeprom_partition_size(struct udevice *dev)
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{
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struct i2c_eeprom_partition *priv = dev_get_priv(dev);
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return priv->size;
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}
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static const struct i2c_eeprom_ops i2c_eeprom_partition_ops = {
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.read = i2c_eeprom_partition_read,
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.write = i2c_eeprom_partition_write,
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.size = i2c_eeprom_partition_size,
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};
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U_BOOT_DRIVER(i2c_eeprom_partition) = {
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.name = "i2c_eeprom_partition",
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.id = UCLASS_I2C_EEPROM,
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.probe = i2c_eeprom_partition_probe,
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.ofdata_to_platdata = i2c_eeprom_partition_ofdata_to_platdata,
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.priv_auto_alloc_size = sizeof(struct i2c_eeprom_partition),
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.ops = &i2c_eeprom_partition_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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