/*
- * Interface to SPI flash
+ * Common SPI flash Interface
*
* Copyright (C) 2008 Atmel Corporation
+ * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*
* See file CREDITS for list of people who contributed to this
* project.
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
*/
+
#ifndef _SPI_FLASH_H_
#define _SPI_FLASH_H_
-#include <spi.h>
#include <linux/types.h>
-#include <linux/compiler.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
+ * @name: Name of SPI flash
+ * @dual_flash: Indicates dual flash memories - dual stacked, parallel
+ * @shift: Flash shift useful in dual parallel
+ * @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
+ * @poll_cmd: Poll cmd - for flash erase/program
+ * @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
+ * @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;
+ const char *name;
+ u8 dual_flash;
+ u8 shift;
- const char *name;
-
- /* Total flash size */
- u32 size;
- /* Write (page) size */
- u32 page_size;
- /* Erase (sector) size */
- u32 sector_size;
+ u32 size;
+ u32 page_size;
+ u32 sector_size;
+ u32 erase_size;
#ifdef CONFIG_SPI_FLASH_BAR
- /* Bank read cmd */
- u8 bank_read_cmd;
- /* Bank write cmd */
- u8 bank_write_cmd;
- /* Current flash bank */
- u8 bank_curr;
+ u8 bank_read_cmd;
+ u8 bank_write_cmd;
+ u8 bank_curr;
#endif
- /* Poll cmd - for flash erase/program */
- u8 poll_cmd;
+ u8 poll_cmd;
+ u8 erase_cmd;
+ u8 read_cmd;
+ u8 write_cmd;
+ u8 dummy_byte;
- void *memory_map; /* Address of read-only SPI flash access */
- 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);
+ void *memory_map;
+ 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);
};
-/**
- * spi_flash_do_alloc - Allocate a new spi flash structure
- *
- * The structure is allocated and cleared with default values for
- * read, write and erase, which the caller can modify. The caller must set
- * up size, page_size and sector_size.
- *
- * Use the helper macro spi_flash_alloc() to call this.
- *
- * @offset: Offset of struct spi_slave within slave structure
- * @size: Size of slave structure
- * @spi: SPI slave
- * @name: Name of SPI flash device
- */
-void *spi_flash_do_alloc(int offset, int size, struct spi_slave *spi,
- const char *name);
-
-/**
- * spi_flash_alloc - Allocate a new SPI flash structure
- *
- * @_struct: Name of structure to allocate (e.g. struct ramtron_spi_fram). This
- * structure must contain a member 'struct spi_flash *flash'.
- * @spi: SPI slave
- * @name: Name of SPI flash device
- */
-#define spi_flash_alloc(_struct, spi, name) \
- spi_flash_do_alloc(offsetof(_struct, flash), sizeof(_struct), \
- spi, name)
+struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
+ unsigned int max_hz, unsigned int spi_mode);
/**
- * spi_flash_alloc_base - Allocate a new SPI flash structure with no private data
+ * Set up a new SPI flash from an fdt node
*
- * @spi: SPI slave
- * @name: Name of SPI flash device
+ * @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
*/
-#define spi_flash_alloc_base(spi, name) \
- spi_flash_do_alloc(0, sizeof(struct spi_flash), spi, name)
+struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
+ int spi_node);
-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,
}
void spi_boot(void) __noreturn;
+void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst);
#endif /* _SPI_FLASH_H_ */
projects / karo-tx-uboot.git / blobdiff