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);
38 * get_sw_write_prot() - Check state of software write-protect feature
40 * SPI flash chips can lock a region of the flash defined by a
41 * 'protected area'. This function checks if this protected area is
44 * @dev: SPI flash device
45 * @return 0 if no region is write-protected, 1 if a region is
46 * write-protected, -ENOSYS if the driver does not implement this,
47 * other -ve value on error
49 int (*get_sw_write_prot)(struct udevice *dev);
52 /* Access the serial operations for a device */
53 #define sf_get_ops(dev) ((struct dm_spi_flash_ops *)(dev)->driver->ops)
55 #ifdef CONFIG_DM_SPI_FLASH
57 * spi_flash_read_dm() - Read data from SPI flash
59 * @dev: SPI flash device
60 * @offset: Offset into device in bytes to read from
61 * @len: Number of bytes to read
62 * @buf: Buffer to put the data that is read
63 * @return 0 if OK, -ve on error
65 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf);
68 * spi_flash_write_dm() - Write data to SPI flash
70 * @dev: SPI flash device
71 * @offset: Offset into device in bytes to write to
72 * @len: Number of bytes to write
73 * @buf: Buffer containing bytes to write
74 * @return 0 if OK, -ve on error
76 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
80 * spi_flash_erase_dm() - Erase blocks of the SPI flash
82 * Note that @len must be a muiltiple of the flash sector size.
84 * @dev: SPI flash device
85 * @offset: Offset into device in bytes to start erasing
86 * @len: Number of bytes to erase
87 * @return 0 if OK, -ve on error
89 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len);
92 * spl_flash_get_sw_write_prot() - Check state of software write-protect feature
94 * SPI flash chips can lock a region of the flash defined by a
95 * 'protected area'. This function checks if this protected area is
98 * @dev: SPI flash device
99 * @return 0 if no region is write-protected, 1 if a region is
100 * write-protected, -ENOSYS if the driver does not implement this,
101 * other -ve value on error
103 int spl_flash_get_sw_write_prot(struct udevice *dev);
106 * spi_flash_std_probe() - Probe a SPI flash device
108 * This is the standard internal method for probing a SPI flash device to
109 * determine its type. It can be used in chip-specific drivers which need to
110 * do this, typically with of-platdata
112 * @dev: SPI-flash device to probe
113 * @return 0 if OK, -ve on error
115 int spi_flash_std_probe(struct udevice *dev);
117 int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
118 unsigned int max_hz, unsigned int spi_mode,
119 struct udevice **devp);
121 /* Compatibility function - this is the old U-Boot API */
122 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
123 unsigned int max_hz, unsigned int spi_mode);
125 /* Compatibility function - this is the old U-Boot API */
126 void spi_flash_free(struct spi_flash *flash);
128 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
129 size_t len, void *buf)
131 return spi_flash_read_dm(flash->dev, offset, len, buf);
134 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
135 size_t len, const void *buf)
137 return spi_flash_write_dm(flash->dev, offset, len, buf);
140 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
143 return spi_flash_erase_dm(flash->dev, offset, len);
146 struct sandbox_state;
148 int sandbox_sf_bind_emul(struct sandbox_state *state, int busnum, int cs,
149 struct udevice *bus, ofnode node, const char *spec);
151 void sandbox_sf_unbind_emul(struct sandbox_state *state, int busnum, int cs);
154 struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
155 unsigned int max_hz, unsigned int spi_mode);
157 void spi_flash_free(struct spi_flash *flash);
159 static inline int spi_flash_read(struct spi_flash *flash, u32 offset,
160 size_t len, void *buf)
162 struct mtd_info *mtd = &flash->mtd;
165 return mtd->_read(mtd, offset, len, &retlen, buf);
168 static inline int spi_flash_write(struct spi_flash *flash, u32 offset,
169 size_t len, const void *buf)
171 struct mtd_info *mtd = &flash->mtd;
174 return mtd->_write(mtd, offset, len, &retlen, buf);
177 static inline int spi_flash_erase(struct spi_flash *flash, u32 offset,
180 struct mtd_info *mtd = &flash->mtd;
181 struct erase_info instr;
183 if (offset % mtd->erasesize || len % mtd->erasesize) {
184 printf("SF: Erase offset/length not multiple of erase size\n");
188 memset(&instr, 0, sizeof(instr));
192 return mtd->_erase(mtd, &instr);
196 static inline int spi_flash_protect(struct spi_flash *flash, u32 ofs, u32 len,
199 if (!flash->flash_lock || !flash->flash_unlock)
203 return flash->flash_lock(flash, ofs, len);
205 return flash->flash_unlock(flash, ofs, len);
208 #endif /* _SPI_FLASH_H_ */