mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-06-09 23:36:03 +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>
103 lines
2.2 KiB
C
103 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 Stefan Roese <sr@denx.de>
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*/
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#include <common.h>
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#include <altera.h>
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#include <spi.h>
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#include <asm/io.h>
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#include <linux/errno.h>
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/* Write the RBF data to FPGA via SPI */
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static int program_write(int spi_bus, int spi_dev, const void *rbf_data,
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unsigned long rbf_size)
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{
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struct spi_slave *slave;
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int ret;
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debug("%s (%d): data=%p size=%ld\n",
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__func__, __LINE__, rbf_data, rbf_size);
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/* FIXME: How to get the max. SPI clock and SPI mode? */
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slave = spi_setup_slave(spi_bus, spi_dev, 27777777, SPI_MODE_3);
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if (!slave)
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return -1;
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if (spi_claim_bus(slave))
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return -1;
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ret = spi_xfer(slave, rbf_size * 8, rbf_data, (void *)rbf_data,
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SPI_XFER_BEGIN | SPI_XFER_END);
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spi_release_bus(slave);
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return ret;
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}
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/*
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* This is the interface used by FPGA driver.
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* Return 0 for sucess, non-zero for error.
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*/
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int stratixv_load(Altera_desc *desc, const void *rbf_data, size_t rbf_size)
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{
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altera_board_specific_func *pfns = desc->iface_fns;
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int cookie = desc->cookie;
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int spi_bus;
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int spi_dev;
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int ret = 0;
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if ((u32)rbf_data & 0x3) {
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puts("FPGA: Unaligned data, realign to 32bit boundary.\n");
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return -EINVAL;
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}
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/* Run the pre configuration function if there is one */
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if (pfns->pre)
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(pfns->pre)(cookie);
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/* Establish the initial state */
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if (pfns->config) {
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/* De-assert nCONFIG */
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(pfns->config)(false, true, cookie);
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/* nConfig minimum low pulse width is 2us */
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udelay(200);
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/* Assert nCONFIG */
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(pfns->config)(true, true, cookie);
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/* nCONFIG high to first rising clock on DCLK min 1506 us */
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udelay(1600);
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}
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/* Write the RBF data to FPGA */
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if (pfns->write) {
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/*
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* Use board specific data function to write bitstream
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* into the FPGA
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*/
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ret = (pfns->write)(rbf_data, rbf_size, true, cookie);
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} else {
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/*
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* Use common SPI functions to write bitstream into the
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* FPGA
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*/
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spi_bus = COOKIE2SPI_BUS(cookie);
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spi_dev = COOKIE2SPI_DEV(cookie);
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ret = program_write(spi_bus, spi_dev, rbf_data, rbf_size);
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}
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if (ret)
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return ret;
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/* Check done pin */
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if (pfns->done) {
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ret = (pfns->done)(cookie);
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if (ret)
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printf("Error: DONE not set (ret=%d)!\n", ret);
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}
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return ret;
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}
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