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dm: sf: Add driver model read/write/erase methods

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Permit use of a udevice to talk to SPI flash. Ultimately we would like
to retire the use of 'struct spi_flash' for this purpose, so create the
new API for those who want to move to it.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2015-03-26 09:29:25 -06:00
parent 60304592b9
commit 8d987abc6a
2 changed files with 57 additions and 6 deletions
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16
drivers/mtd/spi/sf-uclass.c
View file

@ -11,6 +11,22 @@
#include <dm/device-internal.h>
#include "sf_internal.h"
int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
{
return sf_get_ops(dev)->read(dev, offset, len, buf);
}
int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
const void *buf)
{
return sf_get_ops(dev)->write(dev, offset, len, buf);
}
int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
{
return sf_get_ops(dev)->erase(dev, offset, len);
}
/*
* TODO(sjg@chromium.org): This is an old-style function. We should remove
* it when all SPI flash drivers use dm

47
include/spi_flash.h
View file

@ -118,6 +118,41 @@ struct dm_spi_flash_ops {
#define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
#ifdef CONFIG_DM_SPI_FLASH
/**
* spi_flash_read_dm() - Read data from SPI flash
*
* @dev: SPI flash device
* @offset: Offset into device in bytes to read from
* @len: Number of bytes to read
* @buf: Buffer to put the data that is read
* @return 0 if OK, -ve on error
*/
int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
/**
* spi_flash_write_dm() - Write data to SPI flash
*
* @dev: SPI flash device
* @offset: Offset into device in bytes to write to
* @len: Number of bytes to write
* @buf: Buffer containing bytes to write
* @return 0 if OK, -ve on error
*/
int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
const void *buf);
/**
* spi_flash_erase_dm() - Erase blocks of the SPI flash
*
* Note that @len must be a muiltiple of the flash sector size.
*
* @dev: SPI flash device
* @offset: Offset into device in bytes to start erasing
* @len: Number of bytes to erase
* @return 0 if OK, -ve on error
*/
int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode,
struct udevice **devp);
@ -132,21 +167,21 @@ void spi_flash_free(struct spi_flash *flash);
int spi_flash_remove(struct udevice *flash);
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
size_t len, void *buf)
size_t len, void *buf)
{
return sf_get_ops(flash->dev)->read(flash->dev, offset, len, buf);
return spi_flash_read_dm(flash->dev, offset, len, buf);
}
static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
size_t len, const void *buf)
size_t len, const void *buf)
{
return sf_get_ops(flash->dev)->write(flash->dev, offset, len, buf);
return spi_flash_write_dm(flash->dev, offset, len, buf);
}
static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
size_t len)
size_t len)
{
return sf_get_ops(flash->dev)->erase(flash->dev, offset, len);
return spi_flash_erase_dm(flash->dev, offset, len);
}
struct sandbox_state;