2 * Common SPI flash Interface
4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
7 * See file CREDITS for list of people who contributed to this
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.
18 #include <dm.h> /* Because we dereference struct udevice here */
19 #include <linux/types.h>
21 #ifndef CONFIG_SF_DEFAULT_SPEED
22 # define CONFIG_SF_DEFAULT_SPEED 1000000
24 #ifndef CONFIG_SF_DEFAULT_MODE
25 # define CONFIG_SF_DEFAULT_MODE SPI_MODE_3
27 #ifndef CONFIG_SF_DEFAULT_CS
28 # define CONFIG_SF_DEFAULT_CS 0
30 #ifndef CONFIG_SF_DEFAULT_BUS
31 # define CONFIG_SF_DEFAULT_BUS 0
37 * struct spi_flash - SPI flash structure
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
65 struct spi_slave *spi;
66 #ifdef CONFIG_DM_SPI_FLASH
78 #ifdef CONFIG_SPI_FLASH_BAR
90 #ifndef CONFIG_DM_SPI_FLASH
92 * These are not strictly needed for driver model, but keep them here
93 * while the transition is in progress.
95 * Normally each driver would provide its own operations, but for
96 * SPI flash most chips use the same algorithms. One approach is
97 * to create a 'common' SPI flash device which knows how to talk
98 * to most devices, and then allow other drivers to be used instead
99 * if required, perhaps with a way of scanning through the list to
100 * find the driver that matches the device.
102 int (*read)(struct spi_flash *flash, u32 offset, size_t len, void *buf);
103 int (*write)(struct spi_flash *flash, u32 offset, size_t len,
105 int (*erase)(struct spi_flash *flash, u32 offset, size_t len);
109 struct dm_spi_flash_ops {
110 int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf);
111 int (*write)(struct udevice *dev, u32 offset, size_t len,
113 int (*erase)(struct udevice *dev, u32 offset, size_t len);
116 /* Access the serial operations for a device */
117 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
119 #ifdef CONFIG_DM_SPI_FLASH
121 * spi_flash_read_dm() - Read data from SPI flash
123 * @dev: SPI flash device
124 * @offset: Offset into device in bytes to read from
125 * @len: Number of bytes to read
126 * @buf: Buffer to put the data that is read
127 * @return 0 if OK, -ve on error
129 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
132 * spi_flash_write_dm() - Write data to SPI flash
134 * @dev: SPI flash device
135 * @offset: Offset into device in bytes to write to
136 * @len: Number of bytes to write
137 * @buf: Buffer containing bytes to write
138 * @return 0 if OK, -ve on error
140 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
144 * spi_flash_erase_dm() - Erase blocks of the SPI flash
146 * Note that @len must be a muiltiple of the flash sector size.
148 * @dev: SPI flash device
149 * @offset: Offset into device in bytes to start erasing
150 * @len: Number of bytes to erase
151 * @return 0 if OK, -ve on error
153 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
155 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
156 unsigned int max_hz, unsigned int spi_mode,
157 struct udevice **devp);
159 /* Compatibility function - this is the old U-Boot API */
160 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
161 unsigned int max_hz, unsigned int spi_mode);
163 /* Compatibility function - this is the old U-Boot API */
164 void spi_flash_free(struct spi_flash *flash);
166 int spi_flash_remove(struct udevice *flash);
168 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
169 size_t len, void *buf)
171 return spi_flash_read_dm(flash->dev, offset, len, buf);
174 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
175 size_t len, const void *buf)
177 return spi_flash_write_dm(flash->dev, offset, len, buf);
180 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
183 return spi_flash_erase_dm(flash->dev, offset, len);
186 struct sandbox_state;
188 int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
189 struct udevice *bus, int of_offset, const char *spec);
191 void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
194 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
195 unsigned int max_hz, unsigned int spi_mode);
198 * Set up a new SPI flash from an fdt node
200 * @param blob Device tree blob
201 * @param slave_node Pointer to this SPI slave node in the device tree
202 * @param spi_node Cached pointer to the SPI interface this node belongs
204 * @return 0 if ok, -1 on error
206 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
209 void spi_flash_free(struct spi_flash *flash);
211 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
212 size_t len, void *buf)
214 return flash->read(flash, offset, len, buf);
217 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
218 size_t len, const void *buf)
220 return flash->write(flash, offset, len, buf);
223 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
226 return flash->erase(flash, offset, len);
230 void spi_boot(void) __noreturn;
231 void spi_spl_load_image(uint32_t offs, unsigned int size, void *vdst);
233 #endif /* _SPI_FLASH_H_ */