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 struct spi_slave *spi; 66 #ifdef CONFIG_DM_SPI_FLASH 67 struct udevice *dev; 68 #endif 69 const char *name; 70 u8 dual_flash; 71 u8 shift; 72 73 u32 size; 74 u32 page_size; 75 u32 sector_size; 76 u32 erase_size; 77 #ifdef CONFIG_SPI_FLASH_BAR 78 u8 bank_read_cmd; 79 u8 bank_write_cmd; 80 u8 bank_curr; 81 #endif 82 u8 poll_cmd; 83 u8 erase_cmd; 84 u8 read_cmd; 85 u8 write_cmd; 86 u8 dummy_byte; 87 88 void *memory_map; 89 #ifndef CONFIG_DM_SPI_FLASH 90 /* 91 * These are not strictly needed for driver model, but keep them here 92 * while the transition is in progress. 93 * 94 * Normally each driver would provide its own operations, but for 95 * SPI flash most chips use the same algorithms. One approach is 96 * to create a 'common' SPI flash device which knows how to talk 97 * to most devices, and then allow other drivers to be used instead 98 * if required, perhaps with a way of scanning through the list to 99 * find the driver that matches the device. 100 */ 101 int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf); 102 int (*write)(struct spi_flash *flash, u32 offset, size_t len, 103 const void *buf); 104 int (*erase)(struct spi_flash *flash, u32 offset, size_t len); 105 #endif 106 }; 107 108 struct dm_spi_flash_ops { 109 int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf); 110 int (*write)(struct udevice *dev, u32 offset, size_t len, 111 const void *buf); 112 int (*erase)(struct udevice *dev, u32 offset, size_t len); 113 }; 114 115 /* Access the serial operations for a device */ 116 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops) 117 118 #ifdef CONFIG_DM_SPI_FLASH 119 /** 120 * spi_flash_read_dm() - Read data from SPI flash 121 * 122 * @dev: SPI flash device 123 * @offset: Offset into device in bytes to read from 124 * @len: Number of bytes to read 125 * @buf: Buffer to put the data that is read 126 * @return 0 if OK, -ve on error 127 */ 128 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf); 129 130 /** 131 * spi_flash_write_dm() - Write data to SPI flash 132 * 133 * @dev: SPI flash device 134 * @offset: Offset into device in bytes to write to 135 * @len: Number of bytes to write 136 * @buf: Buffer containing bytes to write 137 * @return 0 if OK, -ve on error 138 */ 139 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len, 140 const void *buf); 141 142 /** 143 * spi_flash_erase_dm() - Erase blocks of the SPI flash 144 * 145 * Note that @len must be a muiltiple of the flash sector size. 146 * 147 * @dev: SPI flash device 148 * @offset: Offset into device in bytes to start erasing 149 * @len: Number of bytes to erase 150 * @return 0 if OK, -ve on error 151 */ 152 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len); 153 154 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs, 155 unsigned int max_hz, unsigned int spi_mode, 156 struct udevice **devp); 157 158 /* Compatibility function - this is the old U-Boot API */ 159 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, 160 unsigned int max_hz, unsigned int spi_mode); 161 162 /* Compatibility function - this is the old U-Boot API */ 163 void spi_flash_free(struct spi_flash *flash); 164 165 int spi_flash_remove(struct udevice *flash); 166 167 static inline int spi_flash_read(struct spi_flash *flash, u32 offset, 168 size_t len, void *buf) 169 { 170 return spi_flash_read_dm(flash->dev, offset, len, buf); 171 } 172 173 static inline int spi_flash_write(struct spi_flash *flash, u32 offset, 174 size_t len, const void *buf) 175 { 176 return spi_flash_write_dm(flash->dev, offset, len, buf); 177 } 178 179 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, 180 size_t len) 181 { 182 return spi_flash_erase_dm(flash->dev, offset, len); 183 } 184 185 struct sandbox_state; 186 187 int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs, 188 struct udevice *bus, int of_offset, const char *spec); 189 190 void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs); 191 192 #else 193 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs, 194 unsigned int max_hz, unsigned int spi_mode); 195 196 /** 197 * Set up a new SPI flash from an fdt node 198 * 199 * @param blob Device tree blob 200 * @param slave_node Pointer to this SPI slave node in the device tree 201 * @param spi_node Cached pointer to the SPI interface this node belongs 202 * to 203 * @return 0 if ok, -1 on error 204 */ 205 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node, 206 int spi_node); 207 208 void spi_flash_free(struct spi_flash *flash); 209 210 static inline int spi_flash_read(struct spi_flash *flash, u32 offset, 211 size_t len, void *buf) 212 { 213 return flash->read(flash, offset, len, buf); 214 } 215 216 static inline int spi_flash_write(struct spi_flash *flash, u32 offset, 217 size_t len, const void *buf) 218 { 219 return flash->write(flash, offset, len, buf); 220 } 221 222 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset, 223 size_t len) 224 { 225 return flash->erase(flash, offset, len); 226 } 227 #endif 228 229 void spi_boot(void) __noreturn; 230 void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst); 231 232 #endif /* _SPI_FLASH_H_ */ 233