From: Robert Beckett Date: Mon, 28 Oct 2019 18:29:06 +0000 (+0000) Subject: misc: i2c_eeprom: add size query X-Git-Url: http://git.dujemihanovic.xyz/%22/img/sics.gif/%22/static/git-favicon.png?a=commitdiff_plain;h=033e18b47bd020610f84ca88c5ce3b88215d563a;p=u-boot.git misc: i2c_eeprom: add size query Add ability to query size of eeprom device and partitions Signed-off-by: Robert Beckett Reviewed-by: Heiko Schocher --- diff --git a/drivers/misc/i2c_eeprom.c b/drivers/misc/i2c_eeprom.c index 741bae2727..934f82074d 100644 --- a/drivers/misc/i2c_eeprom.c +++ b/drivers/misc/i2c_eeprom.c @@ -12,6 +12,11 @@ #include #include +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); @@ -32,6 +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) { @@ -61,25 +76,39 @@ 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; } @@ -120,21 +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 }, { } }; @@ -208,9 +307,17 @@ static int i2c_eeprom_partition_write(struct udevice *dev, int offset, 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) = { diff --git a/include/i2c_eeprom.h b/include/i2c_eeprom.h index 0fcdf3831b..b96254ae79 100644 --- a/include/i2c_eeprom.h +++ b/include/i2c_eeprom.h @@ -10,6 +10,7 @@ struct i2c_eeprom_ops { int (*read)(struct udevice *dev, int offset, uint8_t *buf, int size); int (*write)(struct udevice *dev, int offset, const uint8_t *buf, int size); + int (*size)(struct udevice *dev); }; struct i2c_eeprom { @@ -17,6 +18,8 @@ struct i2c_eeprom { unsigned long pagesize; /* The EEPROM's page width in bits (pagesize = 2^pagewidth) */ unsigned pagewidth; + /* The EEPROM's capacity in bytes */ + unsigned long size; }; /* @@ -43,4 +46,13 @@ int i2c_eeprom_read(struct udevice *dev, int offset, uint8_t *buf, int size); */ int i2c_eeprom_write(struct udevice *dev, int offset, uint8_t *buf, int size); +/* + * i2c_eeprom_size() - get size of I2C EEPROM chip + * + * @dev: Chip to query + * + * @return +ve size in bytes on success, -ve on failure + */ +int i2c_eeprom_size(struct udevice *dev); + #endif