mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-07-15 07:36:15 +09:00
83d290c56f
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
161 lines
3.5 KiB
C
161 lines
3.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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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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#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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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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struct spi_flash *flash;
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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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/* 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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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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