1 /* SPDX-License-Identifier: GPL-2.0 */
3 * Common SPI flash Interface
5 * Copyright (C) 2008 Atmel Corporation
6 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
12 #include <dm.h> /* Because we dereference struct udevice here */
13 #include <linux/types.h>
14 #include <linux/mtd/spi-nor.h>
16 /* by default ENV use the same parameters than SF command */
17 #ifndef CONFIG_ENV_SPI_BUS
18 # define CONFIG_ENV_SPI_BUS CONFIG_SF_DEFAULT_BUS
20 #ifndef CONFIG_ENV_SPI_CS
21 # define CONFIG_ENV_SPI_CS CONFIG_SF_DEFAULT_CS
23 #ifndef CONFIG_ENV_SPI_MAX_HZ
24 # define CONFIG_ENV_SPI_MAX_HZ CONFIG_SF_DEFAULT_SPEED
26 #ifndef CONFIG_ENV_SPI_MODE
27 # define CONFIG_ENV_SPI_MODE CONFIG_SF_DEFAULT_MODE
32 struct dm_spi_flash_ops {
33 int (*read)(struct udevice *dev, u32 offset, size_t len, void *buf);
34 int (*write)(struct udevice *dev, u32 offset, size_t len,
36 int (*erase)(struct udevice *dev, u32 offset, size_t len);
39 /* Access the serial operations for a device */
40 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
42 #ifdef CONFIG_DM_SPI_FLASH
44 * spi_flash_read_dm() - Read data from SPI flash
46 * @dev: SPI flash device
47 * @offset: Offset into device in bytes to read from
48 * @len: Number of bytes to read
49 * @buf: Buffer to put the data that is read
50 * @return 0 if OK, -ve on error
52 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
55 * spi_flash_write_dm() - Write data to SPI flash
57 * @dev: SPI flash device
58 * @offset: Offset into device in bytes to write to
59 * @len: Number of bytes to write
60 * @buf: Buffer containing bytes to write
61 * @return 0 if OK, -ve on error
63 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
67 * spi_flash_erase_dm() - Erase blocks of the SPI flash
69 * Note that @len must be a muiltiple of the flash sector size.
71 * @dev: SPI flash device
72 * @offset: Offset into device in bytes to start erasing
73 * @len: Number of bytes to erase
74 * @return 0 if OK, -ve on error
76 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
79 * spi_flash_std_probe() - Probe a SPI flash device
81 * This is the standard internal method for probing a SPI flash device to
82 * determine its type. It can be used in chip-specific drivers which need to
83 * do this, typically with of-platdata
85 * @dev: SPI-flash device to probe
86 * @return 0 if OK, -ve on error
88 int spi_flash_std_probe(struct udevice *dev);
90 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
91 unsigned int max_hz, unsigned int spi_mode,
92 struct udevice **devp);
94 /* Compatibility function - this is the old U-Boot API */
95 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
96 unsigned int max_hz, unsigned int spi_mode);
98 /* Compatibility function - this is the old U-Boot API */
99 void spi_flash_free(struct spi_flash *flash);
101 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
102 size_t len, void *buf)
104 return spi_flash_read_dm(flash->dev, offset, len, buf);
107 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
108 size_t len, const void *buf)
110 return spi_flash_write_dm(flash->dev, offset, len, buf);
113 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
116 return spi_flash_erase_dm(flash->dev, offset, len);
119 struct sandbox_state;
121 int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
122 struct udevice *bus, ofnode node, const char *spec);
124 void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
127 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
128 unsigned int max_hz, unsigned int spi_mode);
130 void spi_flash_free(struct spi_flash *flash);
132 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
133 size_t len, void *buf)
135 struct mtd_info *mtd = &flash->mtd;
138 return mtd->_read(mtd, offset, len, &retlen, buf);
141 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
142 size_t len, const void *buf)
144 struct mtd_info *mtd = &flash->mtd;
147 return mtd->_write(mtd, offset, len, &retlen, buf);
150 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
153 struct mtd_info *mtd = &flash->mtd;
154 struct erase_info instr;
156 if (offset % mtd->erasesize || len % mtd->erasesize) {
157 printf("SF: Erase offset/length not multiple of erase size\n");
161 memset(&instr, 0, sizeof(instr));
165 return mtd->_erase(mtd, &instr);
169 static inline int spi_flash_protect(struct spi_flash *flash, u32 ofs, u32 len,
172 if (!flash->flash_lock || !flash->flash_unlock)
176 return flash->flash_lock(flash, ofs, len);
178 return flash->flash_unlock(flash, ofs, len);
181 #endif /* _SPI_FLASH_H_ */