4 * Copyright (C) 2008 Atmel Corporation
5 * Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
6 * Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
8 * SPDX-License-Identifier: GPL-2.0+
18 #include <spi_flash.h>
21 #include "sf_internal.h"
24 * spi_flash_probe_slave() - Probe for a SPI flash device on a bus
27 * @flashp: Pointer to place to put flash info, which may be NULL if the
28 * space should be allocated
30 int spi_flash_probe_slave(struct spi_slave *spi, struct spi_flash *flash)
36 printf("SF: Failed to set up slave\n");
41 ret = spi_claim_bus(spi);
43 debug("SF: Failed to claim SPI bus: %d\n", ret);
47 ret = spi_flash_scan(spi, flash);
53 #ifdef CONFIG_SPI_FLASH_MTD
54 ret = spi_flash_mtd_register(flash);
62 #ifndef CONFIG_DM_SPI_FLASH
63 struct spi_flash *spi_flash_probe_tail(struct spi_slave *bus)
65 struct spi_flash *flash;
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");
74 if (spi_flash_probe_slave(bus, flash)) {
83 struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
84 unsigned int max_hz, unsigned int spi_mode)
86 struct spi_slave *bus;
88 bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
91 return spi_flash_probe_tail(bus);
94 #ifdef CONFIG_OF_SPI_FLASH
95 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
98 struct spi_slave *bus;
100 bus = spi_setup_slave_fdt(blob, slave_node, spi_node);
103 return spi_flash_probe_tail(bus);
107 void spi_flash_free(struct spi_flash *flash)
109 #ifdef CONFIG_SPI_FLASH_MTD
110 spi_flash_mtd_unregister();
112 spi_free_slave(flash->spi);
116 #else /* defined CONFIG_DM_SPI_FLASH */
118 static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
121 struct spi_flash *flash = dev_get_uclass_priv(dev);
123 return spi_flash_cmd_read_ops(flash, offset, len, buf);
126 int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
129 struct spi_flash *flash = dev_get_uclass_priv(dev);
131 #if defined(CONFIG_SPI_FLASH_SST)
132 if (flash->flags & SNOR_F_SST_WR) {
133 if (flash->spi->op_mode_tx & SPI_OPM_TX_BP)
134 return sst_write_bp(flash, offset, len, buf);
136 return sst_write_wp(flash, offset, len, buf);
140 return spi_flash_cmd_write_ops(flash, offset, len, buf);
143 int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
145 struct spi_flash *flash = dev_get_uclass_priv(dev);
147 return spi_flash_cmd_erase_ops(flash, offset, len);
150 int spi_flash_std_probe(struct udevice *dev)
152 struct spi_slave *slave = dev_get_parent_priv(dev);
153 struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
154 struct spi_flash *flash;
156 flash = dev_get_uclass_priv(dev);
158 debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
159 return spi_flash_probe_slave(slave, flash);
162 static const struct dm_spi_flash_ops spi_flash_std_ops = {
163 .read = spi_flash_std_read,
164 .write = spi_flash_std_write,
165 .erase = spi_flash_std_erase,
168 static const struct udevice_id spi_flash_std_ids[] = {
169 { .compatible = "spi-flash" },
173 U_BOOT_DRIVER(spi_flash_std) = {
174 .name = "spi_flash_std",
175 .id = UCLASS_SPI_FLASH,
176 .of_match = spi_flash_std_ids,
177 .probe = spi_flash_std_probe,
178 .priv_auto_alloc_size = sizeof(struct spi_flash),
179 .ops = &spi_flash_std_ops,
182 #endif /* CONFIG_DM_SPI_FLASH */