+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2014 Google, Inc
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
+#include <eeprom.h>
#include <linux/err.h>
+#include <linux/kernel.h>
#include <dm.h>
+#include <dm/device-internal.h>
#include <i2c.h>
#include <i2c_eeprom.h>
+struct i2c_eeprom_drv_data {
+ u32 size; /* size in bytes */
+ u32 pagesize; /* page size in bytes */
+ u32 addr_offset_mask; /* bits in addr used for offset overflow */
+ u32 offset_len; /* size in bytes of offset */
+};
+
int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size)
{
const struct i2c_eeprom_ops *ops = device_get_ops(dev);
return ops->write(dev, offset, buf, size);
}
+int i2c_eeprom_size(struct udevice *dev)
+{
+ const struct i2c_eeprom_ops *ops = device_get_ops(dev);
+
+ if (!ops->size)
+ return -ENOSYS;
+
+ return ops->size(dev);
+}
+
static int i2c_eeprom_std_read(struct udevice *dev, int offset, uint8_t *buf,
int size)
{
static int i2c_eeprom_std_write(struct udevice *dev, int offset,
const uint8_t *buf, int size)
{
- return -ENODEV;
+ struct i2c_eeprom *priv = dev_get_priv(dev);
+ int ret;
+
+ while (size > 0) {
+ int write_size = min_t(int, size, priv->pagesize);
+
+ ret = dm_i2c_write(dev, offset, buf, write_size);
+ if (ret)
+ return ret;
+
+ offset += write_size;
+ buf += write_size;
+ size -= write_size;
+
+ udelay(10000);
+ }
+
+ return 0;
+}
+
+static int i2c_eeprom_std_size(struct udevice *dev)
+{
+ struct i2c_eeprom *priv = dev_get_priv(dev);
+
+ return priv->size;
}
static const struct i2c_eeprom_ops i2c_eeprom_std_ops = {
.read = i2c_eeprom_std_read,
.write = i2c_eeprom_std_write,
+ .size = i2c_eeprom_std_size,
};
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);
+ struct i2c_eeprom_drv_data *data =
+ (struct i2c_eeprom_drv_data *)dev_get_driver_data(dev);
+ u32 pagesize;
+ u32 size;
- /* 6 bit -> page size of up to 2^63 (should be sufficient) */
- priv->pagewidth = data & 0x3F;
- priv->pagesize = (1 << priv->pagewidth);
+ if (dev_read_u32(dev, "pagesize", &pagesize) == 0)
+ priv->pagesize = pagesize;
+ else
+ /* 6 bit -> page size of up to 2^63 (should be sufficient) */
+ priv->pagesize = data->pagesize;
+
+ if (dev_read_u32(dev, "size", &size) == 0)
+ priv->size = size;
+ else
+ priv->size = data->size;
+
+ return 0;
+}
+
+static int i2c_eeprom_std_bind(struct udevice *dev)
+{
+ ofnode partitions = ofnode_find_subnode(dev_ofnode(dev), "partitions");
+ ofnode partition;
+ const char *name;
+
+ if (!ofnode_valid(partitions))
+ return 0;
+ if (!ofnode_device_is_compatible(partitions, "fixed-partitions"))
+ return -ENOTSUPP;
+
+ ofnode_for_each_subnode(partition, partitions) {
+ name = ofnode_get_name(partition);
+ if (!name)
+ continue;
+
+ device_bind_ofnode(dev, DM_GET_DRIVER(i2c_eeprom_partition),
+ name, NULL, partition, NULL);
+ }
return 0;
}
static int i2c_eeprom_std_probe(struct udevice *dev)
{
+ u8 test_byte;
+ int ret;
+ struct i2c_eeprom_drv_data *data =
+ (struct i2c_eeprom_drv_data *)dev_get_driver_data(dev);
+
+ i2c_set_chip_offset_len(dev, data->offset_len);
+ i2c_set_chip_addr_offset_mask(dev, data->addr_offset_mask);
+
+ /* Verify that the chip is functional */
+ ret = i2c_eeprom_read(dev, 0, &test_byte, 1);
+ if (ret)
+ return -ENODEV;
+
return 0;
}
+static const struct i2c_eeprom_drv_data eeprom_data = {
+ .size = 0,
+ .pagesize = 1,
+ .addr_offset_mask = 0,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data mc24aa02e48_data = {
+ .size = 256,
+ .pagesize = 8,
+ .addr_offset_mask = 0,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c01a_data = {
+ .size = 128,
+ .pagesize = 8,
+ .addr_offset_mask = 0,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c02_data = {
+ .size = 256,
+ .pagesize = 8,
+ .addr_offset_mask = 0,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c04_data = {
+ .size = 512,
+ .pagesize = 16,
+ .addr_offset_mask = 0x1,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c08_data = {
+ .size = 1024,
+ .pagesize = 16,
+ .addr_offset_mask = 0x3,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c08a_data = {
+ .size = 1024,
+ .pagesize = 16,
+ .addr_offset_mask = 0x3,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c16a_data = {
+ .size = 2048,
+ .pagesize = 16,
+ .addr_offset_mask = 0x7,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24mac402_data = {
+ .size = 256,
+ .pagesize = 16,
+ .addr_offset_mask = 0,
+ .offset_len = 1,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c32_data = {
+ .size = 4096,
+ .pagesize = 32,
+ .addr_offset_mask = 0,
+ .offset_len = 2,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c64_data = {
+ .size = 8192,
+ .pagesize = 32,
+ .addr_offset_mask = 0,
+ .offset_len = 2,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c128_data = {
+ .size = 16384,
+ .pagesize = 64,
+ .addr_offset_mask = 0,
+ .offset_len = 2,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c256_data = {
+ .size = 32768,
+ .pagesize = 64,
+ .addr_offset_mask = 0,
+ .offset_len = 2,
+};
+
+static const struct i2c_eeprom_drv_data atmel24c512_data = {
+ .size = 65536,
+ .pagesize = 64,
+ .addr_offset_mask = 0,
+ .offset_len = 2,
+};
+
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 },
+ { .compatible = "i2c-eeprom", (ulong)&eeprom_data },
+ { .compatible = "microchip,24aa02e48", (ulong)&mc24aa02e48_data },
+ { .compatible = "atmel,24c01a", (ulong)&atmel24c01a_data },
+ { .compatible = "atmel,24c02", (ulong)&atmel24c02_data },
+ { .compatible = "atmel,24c04", (ulong)&atmel24c04_data },
+ { .compatible = "atmel,24c08", (ulong)&atmel24c08_data },
+ { .compatible = "atmel,24c08a", (ulong)&atmel24c08a_data },
+ { .compatible = "atmel,24c16a", (ulong)&atmel24c16a_data },
+ { .compatible = "atmel,24mac402", (ulong)&atmel24mac402_data },
+ { .compatible = "atmel,24c32", (ulong)&atmel24c32_data },
+ { .compatible = "atmel,24c64", (ulong)&atmel24c64_data },
+ { .compatible = "atmel,24c128", (ulong)&atmel24c128_data },
+ { .compatible = "atmel,24c256", (ulong)&atmel24c256_data },
+ { .compatible = "atmel,24c512", (ulong)&atmel24c512_data },
{ }
};
.name = "i2c_eeprom",
.id = UCLASS_I2C_EEPROM,
.of_match = i2c_eeprom_std_ids,
+ .bind = i2c_eeprom_std_bind,
.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,
};
+struct i2c_eeprom_partition {
+ u32 offset;
+ u32 size;
+};
+
+static int i2c_eeprom_partition_probe(struct udevice *dev)
+{
+ return 0;
+}
+
+static int i2c_eeprom_partition_ofdata_to_platdata(struct udevice *dev)
+{
+ struct i2c_eeprom_partition *priv = dev_get_priv(dev);
+ u32 offset, size;
+ int ret;
+
+ ret = dev_read_u32(dev, "offset", &offset);
+ if (ret)
+ return ret;
+
+ ret = dev_read_u32(dev, "size", &size);
+ if (ret)
+ return ret;
+
+ priv->offset = offset;
+ priv->size = size;
+
+ return 0;
+}
+
+static int i2c_eeprom_partition_read(struct udevice *dev, int offset,
+ u8 *buf, int size)
+{
+ struct i2c_eeprom_partition *priv = dev_get_priv(dev);
+ struct udevice *parent = dev_get_parent(dev);
+
+ if (!parent)
+ return -ENODEV;
+ if (offset + size > priv->size)
+ return -EINVAL;
+
+ return i2c_eeprom_read(parent, offset + priv->offset, buf, size);
+}
+
+static int i2c_eeprom_partition_write(struct udevice *dev, int offset,
+ const u8 *buf, int size)
+{
+ struct i2c_eeprom_partition *priv = dev_get_priv(dev);
+ struct udevice *parent = dev_get_parent(dev);
+
+ if (!parent)
+ return -ENODEV;
+ if (offset + size > priv->size)
+ return -EINVAL;
+
+ return i2c_eeprom_write(parent, offset + priv->offset, (uint8_t *)buf,
+ size);
+}
+
+static int i2c_eeprom_partition_size(struct udevice *dev)
+{
+ struct i2c_eeprom_partition *priv = dev_get_priv(dev);
+
+ return priv->size;
+}
+
+static const struct i2c_eeprom_ops i2c_eeprom_partition_ops = {
+ .read = i2c_eeprom_partition_read,
+ .write = i2c_eeprom_partition_write,
+ .size = i2c_eeprom_partition_size,
+};
+
+U_BOOT_DRIVER(i2c_eeprom_partition) = {
+ .name = "i2c_eeprom_partition",
+ .id = UCLASS_I2C_EEPROM,
+ .probe = i2c_eeprom_partition_probe,
+ .ofdata_to_platdata = i2c_eeprom_partition_ofdata_to_platdata,
+ .priv_auto_alloc_size = sizeof(struct i2c_eeprom_partition),
+ .ops = &i2c_eeprom_partition_ops,
+};
+
UCLASS_DRIVER(i2c_eeprom) = {
.id = UCLASS_I2C_EEPROM,
.name = "i2c_eeprom",
projects / oweals / u-boot.git / blobdiff