1 // SPDX-License-Identifier: GPL-2.0+
5 * Copyright (C) 2008 Atmel Corporation
6 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
7 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
16 #include <spi_flash.h>
18 #include "sf_internal.h"
21 * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
23 * @flashp: Pointer to place to put flash info, which may be NULL if the
24 * space should be allocated
26 static int spi_flash_probe_slave(struct spi_flash *flash)
28 struct spi_slave *spi = flash->spi;
33 printf("SF: Failed to set up slave\n");
38 ret = spi_claim_bus(spi);
40 debug("SF: Failed to claim SPI bus: %d\n", ret);
44 ret = spi_nor_scan(flash);
48 if (CONFIG_IS_ENABLED(SPI_FLASH_MTD))
49 ret = spi_flash_mtd_register(flash);
56 #if !CONFIG_IS_ENABLED(DM_SPI_FLASH)
57 struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
58 unsigned int max_hz, unsigned int spi_mode)
60 struct spi_slave *bus;
61 struct spi_flash *flash;
63 bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
67 /* Allocate space if needed (not used by sf-uclass */
68 flash = calloc(1, sizeof(*flash));
70 debug("SF: Failed to allocate spi_flash\n");
75 if (spi_flash_probe_slave(flash)) {
84 void spi_flash_free(struct spi_flash *flash)
86 if (CONFIG_IS_ENABLED(SPI_FLASH_MTD))
87 spi_flash_mtd_unregister(flash);
89 spi_free_slave(flash->spi);
93 #else /* defined CONFIG_DM_SPI_FLASH */
95 static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
98 struct spi_flash *flash = dev_get_uclass_priv(dev);
99 struct mtd_info *mtd = &flash->mtd;
102 return log_ret(mtd->_read(mtd, offset, len, &retlen, buf));
105 static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
108 struct spi_flash *flash = dev_get_uclass_priv(dev);
109 struct mtd_info *mtd = &flash->mtd;
112 return mtd->_write(mtd, offset, len, &retlen, buf);
115 static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
117 struct spi_flash *flash = dev_get_uclass_priv(dev);
118 struct mtd_info *mtd = &flash->mtd;
119 struct erase_info instr;
121 if (offset % mtd->erasesize || len % mtd->erasesize) {
122 debug("SF: Erase offset/length not multiple of erase size\n");
126 memset(&instr, 0, sizeof(instr));
130 return mtd->_erase(mtd, &instr);
133 static int spi_flash_std_get_sw_write_prot(struct udevice *dev)
135 struct spi_flash *flash = dev_get_uclass_priv(dev);
137 return spi_flash_cmd_get_sw_write_prot(flash);
140 int spi_flash_std_probe(struct udevice *dev)
142 struct spi_slave *slave = dev_get_parent_priv(dev);
143 struct spi_flash *flash;
145 flash = dev_get_uclass_priv(dev);
148 return spi_flash_probe_slave(flash);
151 static int spi_flash_std_remove(struct udevice *dev)
153 struct spi_flash *flash = dev_get_uclass_priv(dev);
156 ret = spi_nor_remove(flash);
160 if (CONFIG_IS_ENABLED(SPI_FLASH_MTD))
161 spi_flash_mtd_unregister(flash);
166 static const struct dm_spi_flash_ops spi_flash_std_ops = {
167 .read = spi_flash_std_read,
168 .write = spi_flash_std_write,
169 .erase = spi_flash_std_erase,
170 .get_sw_write_prot = spi_flash_std_get_sw_write_prot,
173 static const struct udevice_id spi_flash_std_ids[] = {
174 { .compatible = "jedec,spi-nor" },
178 U_BOOT_DRIVER(jedec_spi_nor) = {
179 .name = "jedec_spi_nor",
180 .id = UCLASS_SPI_FLASH,
181 .of_match = spi_flash_std_ids,
182 .probe = spi_flash_std_probe,
183 .remove = spi_flash_std_remove,
184 .priv_auto = sizeof(struct spi_nor),
185 .ops = &spi_flash_std_ops,
186 .flags = DM_FLAG_OS_PREPARE,
189 DM_DRIVER_ALIAS(jedec_spi_nor, spansion_m25p16)
191 #endif /* CONFIG_DM_SPI_FLASH */