mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-09-10 23:03:29 +09:00
![Jagan Teki](/assets/img/avatar_default.png)
The get_sw_write_prot API is used to get the write-protected bits of flash by reading the status register and other wards it's API for reading register bits. 1) This kind of requirement can be achieved using existing flash operations and flash locking API calls instead of making a separate flash API. 2) Technically there is no real hardware user for this API to use in the source tree. 3) Having a flash operations API for simple register read bits also make difficult to extend the flash operations. 4) Instead of touching generic code, it is possible to have this functionality inside spinor operations in the form of flash hooks or fixups for associated flash chips. Considering all these points, this patch drops the get_sw_write_prot and associated code bases. Cc: Simon Glass <sjg@chromium.org> Cc: Vignesh R <vigneshr@ti.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
182 lines
4.9 KiB
C
182 lines
4.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Common SPI flash Interface
|
|
*
|
|
* Copyright (C) 2008 Atmel Corporation
|
|
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
|
|
*/
|
|
|
|
#ifndef _SPI_FLASH_H_
|
|
#define _SPI_FLASH_H_
|
|
|
|
#include <dm.h> /* Because we dereference struct udevice here */
|
|
#include <linux/types.h>
|
|
#include <linux/mtd/spi-nor.h>
|
|
|
|
/* by default ENV use the same parameters than SF command */
|
|
#ifndef CONFIG_ENV_SPI_BUS
|
|
# define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
|
|
#endif
|
|
#ifndef CONFIG_ENV_SPI_CS
|
|
# define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
|
|
#endif
|
|
#ifndef CONFIG_ENV_SPI_MAX_HZ
|
|
# define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
|
|
#endif
|
|
#ifndef CONFIG_ENV_SPI_MODE
|
|
# define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
|
|
#endif
|
|
|
|
struct spi_slave;
|
|
|
|
struct dm_spi_flash_ops {
|
|
int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf);
|
|
int (*write)(struct udevice *dev, u32 offset, size_t len,
|
|
const void *buf);
|
|
int (*erase)(struct udevice *dev, u32 offset, size_t len);
|
|
};
|
|
|
|
/* Access the serial operations for a device */
|
|
#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);
|
|
|
|
/**
|
|
* spi_flash_std_probe() - Probe a SPI flash device
|
|
*
|
|
* This is the standard internal method for probing a SPI flash device to
|
|
* determine its type. It can be used in chip-specific drivers which need to
|
|
* do this, typically with of-platdata
|
|
*
|
|
* @dev: SPI-flash device to probe
|
|
* @return 0 if OK, -ve on error
|
|
*/
|
|
int spi_flash_std_probe(struct udevice *dev);
|
|
|
|
int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
|
|
unsigned int max_hz, unsigned int spi_mode,
|
|
struct udevice **devp);
|
|
|
|
/* Compatibility function - this is the old U-Boot API */
|
|
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int spi_mode);
|
|
|
|
/* Compatibility function - this is the old U-Boot API */
|
|
void spi_flash_free(struct spi_flash *flash);
|
|
|
|
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
|
|
size_t len, void *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)
|
|
{
|
|
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)
|
|
{
|
|
return spi_flash_erase_dm(flash->dev, offset, len);
|
|
}
|
|
|
|
struct sandbox_state;
|
|
|
|
int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
|
|
struct udevice *bus, ofnode node, const char *spec);
|
|
|
|
void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
|
|
|
|
#else
|
|
struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
|
|
unsigned int max_hz, unsigned int spi_mode);
|
|
|
|
void spi_flash_free(struct spi_flash *flash);
|
|
|
|
static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
|
|
size_t len, void *buf)
|
|
{
|
|
struct mtd_info *mtd = &flash->mtd;
|
|
size_t retlen;
|
|
|
|
return mtd->_read(mtd, offset, len, &retlen, buf);
|
|
}
|
|
|
|
static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
|
|
size_t len, const void *buf)
|
|
{
|
|
struct mtd_info *mtd = &flash->mtd;
|
|
size_t retlen;
|
|
|
|
return mtd->_write(mtd, offset, len, &retlen, buf);
|
|
}
|
|
|
|
static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
|
|
size_t len)
|
|
{
|
|
struct mtd_info *mtd = &flash->mtd;
|
|
struct erase_info instr;
|
|
|
|
if (offset % mtd->erasesize || len % mtd->erasesize) {
|
|
printf("SF: Erase offset/length not multiple of erase size\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
memset(&instr, 0, sizeof(instr));
|
|
instr.addr = offset;
|
|
instr.len = len;
|
|
|
|
return mtd->_erase(mtd, &instr);
|
|
}
|
|
#endif
|
|
|
|
static inline int spi_flash_protect(struct spi_flash *flash, u32 ofs, u32 len,
|
|
bool prot)
|
|
{
|
|
if (!flash->flash_lock || !flash->flash_unlock)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (prot)
|
|
return flash->flash_lock(flash, ofs, len);
|
|
else
|
|
return flash->flash_unlock(flash, ofs, len);
|
|
}
|
|
|
|
#endif /* _SPI_FLASH_H_ */
|