mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-14 07:06:19 +09:00
f12f96cfaf
The get_sw_write_prot API is used to get the write-protected bits of flash by reading the status register and other wards it's API for reading register bits. 1) This kind of requirement can be achieved using existing flash operations and flash locking API calls instead of making a separate flash API. 2) Technically there is no real hardware user for this API to use in the source tree. 3) Having a flash operations API for simple register read bits also make difficult to extend the flash operations. 4) Instead of touching generic code, it is possible to have this functionality inside spinor operations in the form of flash hooks or fixups for associated flash chips. Considering all these points, this patch drops the get_sw_write_prot and associated code bases. Cc: Simon Glass <sjg@chromium.org> Cc: Vignesh R <vigneshr@ti.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 2014 Google, Inc
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*/
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#include <common.h>
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#include <dm.h>
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#include <log.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 <dm/device-internal.h>
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#include "sf_internal.h"
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DECLARE_GLOBAL_DATA_PTR;
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int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
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{
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return log_ret(sf_get_ops(dev)->read(dev, offset, len, buf));
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}
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int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
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const void *buf)
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{
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return log_ret(sf_get_ops(dev)->write(dev, offset, len, buf));
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}
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int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
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{
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return log_ret(sf_get_ops(dev)->erase(dev, offset, len));
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}
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/*
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* TODO(sjg@chromium.org): This is an old-style function. We should remove
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* it when all SPI flash drivers use dm
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*/
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struct spi_flash *spi_flash_probe(unsigned int bus, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode)
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{
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struct udevice *dev;
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if (spi_flash_probe_bus_cs(bus, cs, max_hz, spi_mode, &dev))
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return NULL;
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return dev_get_uclass_priv(dev);
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}
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void spi_flash_free(struct spi_flash *flash)
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{
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device_remove(flash->spi->dev, DM_REMOVE_NORMAL);
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}
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int spi_flash_probe_bus_cs(unsigned int busnum, unsigned int cs,
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unsigned int max_hz, unsigned int spi_mode,
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struct udevice **devp)
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{
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struct spi_slave *slave;
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struct udevice *bus;
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char *str;
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int ret;
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#if defined(CONFIG_SPL_BUILD) && CONFIG_IS_ENABLED(USE_TINY_PRINTF)
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str = "spi_flash";
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#else
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char name[30];
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snprintf(name, sizeof(name), "spi_flash@%d:%d", busnum, cs);
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str = strdup(name);
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#endif
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ret = spi_get_bus_and_cs(busnum, cs, max_hz, spi_mode,
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"spi_flash_std", str, &bus, &slave);
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if (ret)
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return ret;
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*devp = slave->dev;
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return 0;
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}
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static int spi_flash_post_bind(struct udevice *dev)
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{
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#if defined(CONFIG_NEEDS_MANUAL_RELOC)
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struct dm_spi_flash_ops *ops = sf_get_ops(dev);
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static int reloc_done;
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if (!reloc_done) {
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if (ops->read)
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ops->read += gd->reloc_off;
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if (ops->write)
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ops->write += gd->reloc_off;
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if (ops->erase)
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ops->erase += gd->reloc_off;
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reloc_done++;
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}
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#endif
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return 0;
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}
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UCLASS_DRIVER(spi_flash) = {
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.id = UCLASS_SPI_FLASH,
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.name = "spi_flash",
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.post_bind = spi_flash_post_bind,
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.per_device_auto_alloc_size = sizeof(struct spi_flash),
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};
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