diff options
Diffstat (limited to 'drivers/misc/i2c_eeprom.c')
| -rw-r--r-- | drivers/misc/i2c_eeprom.c | 243 |
1 files changed, 224 insertions, 19 deletions
diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c index 3755dbf74b..934f82074d 100644 --- a/drivers/misc/i2c_eeprom.c +++ b/drivers/misc/i2c_eeprom.c @@ -8,9 +8,15 @@ #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 pagewidth; /* pagesize = 2^pagewidth */ +}; + int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size) { const struct i2c_eeprom_ops *ops = device_get_ops(dev); @@ -31,6 +37,16 @@ int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size) 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) { @@ -60,25 +76,62 @@ static int i2c_eeprom_std_write(struct udevice *dev, int offset, 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; if (dev_read_u32(dev, "pagesize", &pagesize) == 0) { priv->pagesize = pagesize; - return 0; + } else { + /* 6 bit -> page size of up to 2^63 (should be sufficient) */ + priv->pagewidth = data->pagewidth; + priv->pagesize = (1 << priv->pagewidth); } - /* 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, "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; } @@ -96,21 +149,91 @@ static int i2c_eeprom_std_probe(struct udevice *dev) return 0; } +static const struct i2c_eeprom_drv_data eeprom_data = { + .size = 0, + .pagewidth = 0, +}; + +static const struct i2c_eeprom_drv_data mc24aa02e48_data = { + .size = 256, + .pagewidth = 3, +}; + +static const struct i2c_eeprom_drv_data atmel24c01a_data = { + .size = 128, + .pagewidth = 3, +}; + +static const struct i2c_eeprom_drv_data atmel24c02_data = { + .size = 256, + .pagewidth = 3, +}; + +static const struct i2c_eeprom_drv_data atmel24c04_data = { + .size = 512, + .pagewidth = 4, +}; + +static const struct i2c_eeprom_drv_data atmel24c08_data = { + .size = 1024, + .pagewidth = 4, +}; + +static const struct i2c_eeprom_drv_data atmel24c08a_data = { + .size = 1024, + .pagewidth = 4, +}; + +static const struct i2c_eeprom_drv_data atmel24c16a_data = { + .size = 2048, + .pagewidth = 4, +}; + +static const struct i2c_eeprom_drv_data atmel24mac402_data = { + .size = 256, + .pagewidth = 4, +}; + +static const struct i2c_eeprom_drv_data atmel24c32_data = { + .size = 4096, + .pagewidth = 5, +}; + +static const struct i2c_eeprom_drv_data atmel24c64_data = { + .size = 8192, + .pagewidth = 5, +}; + +static const struct i2c_eeprom_drv_data atmel24c128_data = { + .size = 16384, + .pagewidth = 6, +}; + +static const struct i2c_eeprom_drv_data atmel24c256_data = { + .size = 32768, + .pagewidth = 6, +}; + +static const struct i2c_eeprom_drv_data atmel24c512_data = { + .size = 65536, + .pagewidth = 6, +}; + 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,24c08", .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 }, { } }; @@ -118,12 +241,94 @@ U_BOOT_DRIVER(i2c_eeprom_std) = { .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", |