*
* 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.
+ * version 2 as published by the Free Software Foundation.
*/
#ifndef _SPI_FLASH_H_
#include <linux/types.h>
#include <linux/compiler.h>
+/* sf param flags */
+#define SECT_4K 1 << 1
+#define SECT_32K 1 << 2
+#define E_FSR 1 << 3
+#define WR_QPP 1 << 4
+
+/* Enum list - Full read commands */
+enum spi_read_cmds {
+ ARRAY_SLOW = 1 << 0,
+ DUAL_OUTPUT_FAST = 1 << 1,
+ DUAL_IO_FAST = 1 << 2,
+ QUAD_OUTPUT_FAST = 1 << 3,
+ QUAD_IO_FAST = 1 << 4,
+};
+#define RD_EXTN ARRAY_SLOW | DUAL_OUTPUT_FAST | DUAL_IO_FAST
+#define RD_FULL RD_EXTN | QUAD_OUTPUT_FAST | QUAD_IO_FAST
+
+/* Dual SPI flash memories */
+enum spi_dual_flash {
+ SF_SINGLE_FLASH = 0,
+ SF_DUAL_STACKED_FLASH = 1 << 0,
+ SF_DUAL_PARALLEL_FLASH = 1 << 1,
+};
+
+/**
+ * struct spi_flash_params - SPI/QSPI flash device params structure
+ *
+ * @name: Device name ([MANUFLETTER][DEVTYPE][DENSITY][EXTRAINFO])
+ * @jedec: Device jedec ID (0x[1byte_manuf_id][2byte_dev_id])
+ * @ext_jedec: Device ext_jedec ID
+ * @sector_size: Sector size of this device
+ * @nr_sectors: No.of sectors on this device
+ * @e_rd_cmd: Enum list for read commands
+ * @flags: Importent param, for flash specific behaviour
+ */
+struct spi_flash_params {
+ const char *name;
+ u32 jedec;
+ u16 ext_jedec;
+ u32 sector_size;
+ u32 nr_sectors;
+ u8 e_rd_cmd;
+ u16 flags;
+};
+
+extern const struct spi_flash_params spi_flash_params_table[];
+
/**
* 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
* @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
struct spi_flash {
struct spi_slave *spi;
const char *name;
+ u8 dual_flash;
+ u8 shift;
u32 size;
u32 page_size;
#endif
u8 poll_cmd;
u8 erase_cmd;
+ u8 read_cmd;
+ u8 write_cmd;
+ u8 dummy_byte;
void *memory_map;
int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
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,