/* * Common SPI flash Interface * * Copyright (C) 2008 Atmel Corporation * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc. * * SPDX-License-Identifier: GPL-2.0 */ #ifndef _SPI_FLASH_H_ #define _SPI_FLASH_H_ #include <dm.h> /* Because we dereference struct udevice here */ #include <linux/types.h> #ifndef CONFIG_SF_DEFAULT_SPEED # define CONFIG_SF_DEFAULT_SPEED 1000000 #endif #ifndef CONFIG_SF_DEFAULT_MODE # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3 #endif #ifndef CONFIG_SF_DEFAULT_CS # define CONFIG_SF_DEFAULT_CS 0 #endif #ifndef CONFIG_SF_DEFAULT_BUS # define CONFIG_SF_DEFAULT_BUS 0 #endif struct spi_slave; /** * struct spi_flash - SPI flash structure * * @spi: SPI slave * @dev: SPI flash device * @name: Name of SPI flash * @dual_flash: Indicates dual flash memories - dual stacked, parallel * @shift: Flash shift useful in dual parallel * @flags: Indication of spi flash flags * @size: Total flash size * @page_size: Write (page) size * @sector_size: Sector size * @erase_size: Erase size * @bank_read_cmd: Bank read cmd * @bank_write_cmd: Bank write cmd * @bank_curr: Current flash bank * @erase_cmd: Erase cmd 4K, 32K, 64K * @read_cmd: Read cmd - Array Fast, Extn read and quad read. * @write_cmd: Write cmd - page and quad program. * @dummy_byte: Dummy cycles for read operation. * @memory_map: Address of read-only SPI flash access * @flash_lock: lock a region of the SPI Flash * @flash_unlock: unlock a region of the SPI Flash * @flash_is_locked: check if a region of the SPI Flash is completely locked * @read: Flash read ops: Read len bytes at offset into buf * Supported cmds: Fast Array Read * @write: Flash write ops: Write len bytes from buf into offset * Supported cmds: Page Program * @erase: Flash erase ops: Erase len bytes from offset * Supported cmds: Sector erase 4K, 32K, 64K * return 0 - Success, 1 - Failure */ struct spi_flash { struct spi_slave *spi; #ifdef CONFIG_DM_SPI_FLASH struct udevice *dev; #endif const char *name; u8 dual_flash; u8 shift; u16 flags; u32 size; u32 page_size; u32 sector_size; u32 erase_size; #ifdef CONFIG_SPI_FLASH_BAR u8 bank_read_cmd; u8 bank_write_cmd; u8 bank_curr; #endif u8 erase_cmd; u8 read_cmd; u8 write_cmd; u8 dummy_byte; void *memory_map; int (*flash_lock)(struct spi_flash *flash, u32 ofs, size_t len); int (*flash_unlock)(struct spi_flash *flash, u32 ofs, size_t len); int (*flash_is_locked)(struct spi_flash *flash, u32 ofs, size_t len); #ifndef CONFIG_DM_SPI_FLASH /* * These are not strictly needed for driver model, but keep them here * while the transition is in progress. * * Normally each driver would provide its own operations, but for * SPI flash most chips use the same algorithms. One approach is * to create a 'common' SPI flash device which knows how to talk * to most devices, and then allow other drivers to be used instead * if required, perhaps with a way of scanning through the list to * find the driver that matches the device. */ int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf); int (*write)(struct spi_flash *flash, u32 offset, size_t len, const void *buf); int (*erase)(struct spi_flash *flash, u32 offset, size_t len); #endif }; 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); 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, int of_offset, 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); /** * Set up a new SPI flash from an fdt node * * @param blob Device tree blob * @param slave_node Pointer to this SPI slave node in the device tree * @param spi_node Cached pointer to the SPI interface this node belongs * to * @return 0 if ok, -1 on error */ struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node, int spi_node); 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 flash->read(flash, offset, len, buf); } static inline int spi_flash_write(struct spi_flash *flash, u32 offset, size_t len, const void *buf) { return flash->write(flash, offset, len, buf); } static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, size_t len) { return flash->erase(flash, offset, len); } #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); } void spi_boot(void) __noreturn; void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst); #endif /* _SPI_FLASH_H_ */