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+
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_flash_scan(flash);
48 #ifdef CONFIG_SPI_FLASH_MTD
49 ret = spi_flash_mtd_register(flash);
57 #ifndef CONFIG_DM_SPI_FLASH
58 static struct spi_flash *spi_flash_probe_tail(struct spi_slave *bus)
60 struct spi_flash *flash;
62 /* Allocate space if needed (not used by sf-uclass */
63 flash = calloc(1, sizeof(*flash));
65 debug("SF: Failed to allocate spi_flash\n");
70 if (spi_flash_probe_slave(flash)) {
79 struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
80 unsigned int max_hz, unsigned int spi_mode)
82 struct spi_slave *bus;
84 bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
87 return spi_flash_probe_tail(bus);
90 #ifdef CONFIG_OF_SPI_FLASH
91 struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
94 struct spi_slave *bus;
96 bus = spi_setup_slave_fdt(blob, slave_node, spi_node);
99 return spi_flash_probe_tail(bus);
103 void spi_flash_free(struct spi_flash *flash)
105 #ifdef CONFIG_SPI_FLASH_MTD
106 spi_flash_mtd_unregister();
108 spi_free_slave(flash->spi);
112 #else /* defined CONFIG_DM_SPI_FLASH */
114 static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
117 struct spi_flash *flash = dev_get_uclass_priv(dev);
119 return spi_flash_cmd_read_ops(flash, offset, len, buf);
122 static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
125 struct spi_flash *flash = dev_get_uclass_priv(dev);
127 #if defined(CONFIG_SPI_FLASH_SST)
128 if (flash->flags & SNOR_F_SST_WR) {
129 if (flash->spi->mode & SPI_TX_BYTE)
130 return sst_write_bp(flash, offset, len, buf);
132 return sst_write_wp(flash, offset, len, buf);
136 return spi_flash_cmd_write_ops(flash, offset, len, buf);
139 static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
141 struct spi_flash *flash = dev_get_uclass_priv(dev);
143 return spi_flash_cmd_erase_ops(flash, offset, len);
146 static int spi_flash_std_probe(struct udevice *dev)
148 struct spi_slave *slave = dev_get_parent_priv(dev);
149 struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
150 struct spi_flash *flash;
152 flash = dev_get_uclass_priv(dev);
155 debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
156 return spi_flash_probe_slave(flash);
159 static const struct dm_spi_flash_ops spi_flash_std_ops = {
160 .read = spi_flash_std_read,
161 .write = spi_flash_std_write,
162 .erase = spi_flash_std_erase,
165 static const struct udevice_id spi_flash_std_ids[] = {
166 { .compatible = "spi-flash" },
170 U_BOOT_DRIVER(spi_flash_std) = {
171 .name = "spi_flash_std",
172 .id = UCLASS_SPI_FLASH,
173 .of_match = spi_flash_std_ids,
174 .probe = spi_flash_std_probe,
175 .priv_auto_alloc_size = sizeof(struct spi_flash),
176 .ops = &spi_flash_std_ops,
179 #endif /* CONFIG_DM_SPI_FLASH */