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/*
* SPI flash probing
*
* Copyright (C) 2008 Atmel Corporation
* Copyright (C) 2010 Reinhard Meyer, EMK Elektronik
* Copyright (C) 2013 Jagannadha Sutradharudu Teki, Xilinx Inc.
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <spi.h>
#include <spi_flash.h>
#include "sf_internal.h"
/**
* spi_flash_probe_slave() - Probe for a SPI flash device on a bus
*
* @flashp: Pointer to place to put flash info, which may be NULL if the
* space should be allocated
*/
static int spi_flash_probe_slave(struct spi_flash *flash)
{
struct spi_slave *spi = flash->spi;
int ret;
/* Setup spi_slave */
if (!spi) {
printf("SF: Failed to set up slave\n");
return -ENODEV;
}
/* Claim spi bus */
ret = spi_claim_bus(spi);
if (ret) {
debug("SF: Failed to claim SPI bus: %d\n", ret);
return ret;
}
ret = spi_flash_scan(flash);
if (ret) {
ret = -EINVAL;
goto err_read_id;
}
#ifdef CONFIG_SPI_FLASH_MTD
ret = spi_flash_mtd_register(flash);
#endif
err_read_id:
spi_release_bus(spi);
return ret;
}
#ifndef CONFIG_DM_SPI_FLASH
static struct spi_flash *spi_flash_probe_tail(struct spi_slave *bus)
{
struct spi_flash *flash;
/* Allocate space if needed (not used by sf-uclass */
flash = calloc(1, sizeof(*flash));
if (!flash) {
debug("SF: Failed to allocate spi_flash\n");
return NULL;
}
flash->spi = bus;
if (spi_flash_probe_slave(flash)) {
spi_free_slave(bus);
free(flash);
return NULL;
}
return flash;
}
struct spi_flash *spi_flash_probe(unsigned int busnum, unsigned int cs,
unsigned int max_hz, unsigned int spi_mode)
{
struct spi_slave *bus;
bus = spi_setup_slave(busnum, cs, max_hz, spi_mode);
if (!bus)
return NULL;
return spi_flash_probe_tail(bus);
}
#ifdef CONFIG_OF_SPI_FLASH
struct spi_flash *spi_flash_probe_fdt(const void *blob, int slave_node,
int spi_node)
{
struct spi_slave *bus;
bus = spi_setup_slave_fdt(blob, slave_node, spi_node);
if (!bus)
return NULL;
return spi_flash_probe_tail(bus);
}
#endif
void spi_flash_free(struct spi_flash *flash)
{
#ifdef CONFIG_SPI_FLASH_MTD
spi_flash_mtd_unregister();
#endif
spi_free_slave(flash->spi);
free(flash);
}
#else /* defined CONFIG_DM_SPI_FLASH */
static int spi_flash_std_read(struct udevice *dev, u32 offset, size_t len,
void *buf)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
return spi_flash_cmd_read_ops(flash, offset, len, buf);
}
static int spi_flash_std_write(struct udevice *dev, u32 offset, size_t len,
const void *buf)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
#if defined(CONFIG_SPI_FLASH_SST)
if (flash->flags & SNOR_F_SST_WR) {
if (flash->spi->op_mode_tx & SPI_OPM_TX_BP)
return sst_write_bp(flash, offset, len, buf);
else
return sst_write_wp(flash, offset, len, buf);
}
#endif
return spi_flash_cmd_write_ops(flash, offset, len, buf);
}
static int spi_flash_std_erase(struct udevice *dev, u32 offset, size_t len)
{
struct spi_flash *flash = dev_get_uclass_priv(dev);
return spi_flash_cmd_erase_ops(flash, offset, len);
}
static int spi_flash_std_probe(struct udevice *dev)
{
struct spi_slave *slave = dev_get_parent_priv(dev);
struct dm_spi_slave_platdata *plat = dev_get_parent_platdata(dev);
struct spi_flash *flash;
flash = dev_get_uclass_priv(dev);
flash->dev = dev;
flash->spi = slave;
debug("%s: slave=%p, cs=%d\n", __func__, slave, plat->cs);
return spi_flash_probe_slave(flash);
}
static const struct dm_spi_flash_ops spi_flash_std_ops = {
.read = spi_flash_std_read,
.write = spi_flash_std_write,
.erase = spi_flash_std_erase,
};
static const struct udevice_id spi_flash_std_ids[] = {
{ .compatible = "spi-flash" },
{ }
};
U_BOOT_DRIVER(spi_flash_std) = {
.name = "spi_flash_std",
.id = UCLASS_SPI_FLASH,
.of_match = spi_flash_std_ids,
.probe = spi_flash_std_probe,
.priv_auto_alloc_size = sizeof(struct spi_flash),
.ops = &spi_flash_std_ops,
};
#endif /* CONFIG_DM_SPI_FLASH */
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