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