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author | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-06-19 16:51:54 +0300 |
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committer | Kyösti Mälkki <kyosti.malkki@gmail.com> | 2014-07-03 09:46:15 +0200 |
commit | adf3d6ff52eb674267eacbf37f811c7144e857b3 (patch) | |
tree | 72dea3e6d005e8f438951e431659dc96e7e03a93 /src/cpu/amd/agesa/spi.c | |
parent | 23b4f0c7344c199d5adb0aece8d3ca9a624f4a34 (diff) |
AGESA: Clean separation of SPI flash
To be precise, wakeup from S3 does not involve SPI writing, while
preparing for it on cold power-ons currently does.
For S3DataTypeMtrr storage is changed such that the first 4 bytes
is the length of data stored like with the other two S3DataType.
Change-Id: Id920650474530d4191075da4ef70daa66c904c5b
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/6085
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Diffstat (limited to 'src/cpu/amd/agesa/spi.c')
-rw-r--r-- | src/cpu/amd/agesa/spi.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/src/cpu/amd/agesa/spi.c b/src/cpu/amd/agesa/spi.c new file mode 100644 index 0000000000..f4ffa6262f --- /dev/null +++ b/src/cpu/amd/agesa/spi.c @@ -0,0 +1,54 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2012 Advanced Micro Devices, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <console/console.h> +#include <spi-generic.h> +#include <spi_flash.h> + +#include "s3_resume.h" + +void spi_SaveS3info(u32 pos, u32 size, u8 *buf, u32 len) +{ + struct spi_flash *flash; + + spi_init(); + flash = spi_flash_probe(0, 0, 0, 0); + if (!flash) { + printk(BIOS_DEBUG, "Could not find SPI device\n"); + /* Dont make flow stop. */ + return; + } + + flash->spi->rw = SPI_WRITE_FLAG; + spi_claim_bus(flash->spi); + + flash->erase(flash, pos, size); + flash->write(flash, pos, sizeof(len), &len); + + u32 nvram_pos; + for (nvram_pos = 0; nvram_pos < len - CONFIG_AMD_SB_SPI_TX_LEN; nvram_pos += CONFIG_AMD_SB_SPI_TX_LEN) { + flash->write(flash, nvram_pos + pos + 4, CONFIG_AMD_SB_SPI_TX_LEN, (u8 *)(buf + nvram_pos)); + } + flash->write(flash, nvram_pos + pos + 4, len % CONFIG_AMD_SB_SPI_TX_LEN, (u8 *)(buf + nvram_pos)); + + flash->spi->rw = SPI_WRITE_FLAG; + spi_release_bus(flash->spi); + + return; +} |