include/spi_flash.h

   1 /*
   2  * Common SPI flash Interface
   3  *
   4  * Copyright (C) 2008 Atmel Corporation
   5  * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
   6  *
   7  * See file CREDITS for list of people who contributed to this
   8  * project.
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * version 2 as published by the Free Software Foundation.
  13  */
  14
  15 #ifndef _SPI_FLASH_H_
  16 #define _SPI_FLASH_H_
  17
  18 #include <dm.h> /* Because we dereference struct udevice here */
  19 #include <linux/types.h>
  20
  21 #ifndef CONFIG_SF_DEFAULT_SPEED
  22 # define CONFIG_SF_DEFAULT_SPEED        1000000
  23 #endif
  24 #ifndef CONFIG_SF_DEFAULT_MODE
  25 # define CONFIG_SF_DEFAULT_MODE         SPI_MODE_3
  26 #endif
  27 #ifndef CONFIG_SF_DEFAULT_CS
  28 # define CONFIG_SF_DEFAULT_CS           0
  29 #endif
  30 #ifndef CONFIG_SF_DEFAULT_BUS
  31 # define CONFIG_SF_DEFAULT_BUS          0
  32 #endif
  33
  34 struct spi_slave;
  35
  36 /**
  37  * struct spi_flash - SPI flash structure
  38  *
  39  * @spi:                SPI slave
  40  * @name:               Name of SPI flash
  41  * @dual_flash: Indicates dual flash memories - dual stacked, parallel
  42  * @shift:              Flash shift useful in dual parallel
  43  * @size:               Total flash size
  44  * @page_size:          Write (page) size
  45  * @sector_size:        Sector size
  46  * @erase_size: Erase size
  47  * @bank_read_cmd:      Bank read cmd
  48  * @bank_write_cmd:     Bank write cmd
  49  * @bank_curr:          Current flash bank
  50  * @poll_cmd:           Poll cmd - for flash erase/program
  51  * @erase_cmd:          Erase cmd 4K, 32K, 64K
  52  * @read_cmd:           Read cmd - Array Fast, Extn read and quad read.
  53  * @write_cmd:          Write cmd - page and quad program.
  54  * @dummy_byte: Dummy cycles for read operation.
  55  * @memory_map: Address of read-only SPI flash access
  56  * @read:               Flash read ops: Read len bytes at offset into buf
  57  *                      Supported cmds: Fast Array Read
  58  * @write:              Flash write ops: Write len bytes from buf into offset
  59  *                      Supported cmds: Page Program
  60  * @erase:              Flash erase ops: Erase len bytes from offset
  61  *                      Supported cmds: Sector erase 4K, 32K, 64K
  62  * return 0 - Success, 1 - Failure
  63  */
  64 struct spi_flash {
  65 #ifdef CONFIG_DM_SPI_FLASH
  66         struct spi_slave *spi;
  67         struct udevice *dev;
  68 #else
  69         struct spi_slave *spi;
  70 #endif
  71         const char *name;
  72         u8 dual_flash;
  73         u8 shift;
  74
  75         u32 size;
  76         u32 page_size;
  77         u32 sector_size;
  78         u32 erase_size;
  79 #ifdef CONFIG_SPI_FLASH_BAR
  80         u8 bank_read_cmd;
  81         u8 bank_write_cmd;
  82         u8 bank_curr;
  83 #endif
  84         u8 poll_cmd;
  85         u8 erase_cmd;
  86         u8 read_cmd;
  87         u8 write_cmd;
  88         u8 dummy_byte;
  89
  90         void *memory_map;
  91 #ifndef CONFIG_DM_SPI_FLASH
  92         /*
  93          * These are not strictly needed for driver model, but keep them here
  94          * whilt the transition is in progress.
  95          *
  96          * Normally each driver would provide its own operations, but for
  97          * SPI flash most chips use the same algorithms. One approach is
  98          * to create a 'common' SPI flash device which knows how to talk
  99          * to most devices, and then allow other drivers to be used instead
 100          * if requird, perhaps with a way of scanning through the list to
 101          * find the driver that matches the device.
 102          */
 103         int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
 104         int (*write)(struct spi_flash *flash, u32 offset, size_t len,
 105                         const void *buf);
 106         int (*erase)(struct spi_flash *flash, u32 offset, size_t len);
 107 #endif
 108 };
 109
 110 struct dm_spi_flash_ops {
 111         int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf);
 112         int (*write)(struct udevice *dev, u32 offset, size_t len,
 113                      const void *buf);
 114         int (*erase)(struct udevice *dev, u32 offset, size_t len);
 115 };
 116
 117 /* Access the serial operations for a device */
 118 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
 119
 120 #ifdef CONFIG_DM_SPI_FLASH
 121 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
 122                            unsigned int max_hz, unsigned int spi_mode,
 123                            struct udevice **devp);
 124
 125 /* Compatibility function - this is the old U-Boot API */
 126 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
 127                                   unsigned int max_hz, unsigned int spi_mode);
 128
 129 /* Compatibility function - this is the old U-Boot API */
 130 void spi_flash_free(struct spi_flash *flash);
 131
 132 int spi_flash_remove(struct udevice *flash);
 133
 134 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
 135                 size_t len, void *buf)
 136 {
 137         return sf_get_ops(flash->dev)->read(flash->dev, offset, len, buf);
 138 }
 139
 140 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
 141                 size_t len, const void *buf)
 142 {
 143         return sf_get_ops(flash->dev)->write(flash->dev, offset, len, buf);
 144 }
 145
 146 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
 147                 size_t len)
 148 {
 149         return sf_get_ops(flash->dev)->erase(flash->dev, offset, len);
 150 }
 151
 152 struct sandbox_state;
 153
 154 int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
 155                          struct udevice *bus, int of_offset, const char *spec);
 156
 157 void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
 158
 159 #else
 160 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
 161                 unsigned int max_hz, unsigned int spi_mode);
 162
 163 /**
 164  * Set up a new SPI flash from an fdt node
 165  *
 166  * @param blob          Device tree blob
 167  * @param slave_node    Pointer to this SPI slave node in the device tree
 168  * @param spi_node      Cached pointer to the SPI interface this node belongs
 169  *                      to
 170  * @return 0 if ok, -1 on error
 171  */
 172 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
 173                                       int spi_node);
 174
 175 void spi_flash_free(struct spi_flash *flash);
 176
 177 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
 178                 size_t len, void *buf)
 179 {
 180         return flash->read(flash, offset, len, buf);
 181 }
 182
 183 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
 184                 size_t len, const void *buf)
 185 {
 186         return flash->write(flash, offset, len, buf);
 187 }
 188
 189 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
 190                 size_t len)
 191 {
 192         return flash->erase(flash, offset, len);
 193 }
 194 #endif
 195
 196 void spi_boot(void) __noreturn;
 197 void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst);
 198
 199 #endif /* _SPI_FLASH_H_ */