diff options
Diffstat (limited to 'src/lib')
| -rw-r--r-- | src/lib/Makefile.inc | 4 | ||||
| -rw-r--r-- | src/lib/cbfs_spi.c | 95 |
2 files changed, 99 insertions, 0 deletions
diff --git a/src/lib/Makefile.inc b/src/lib/Makefile.inc index cf3434d405..05010914ce 100644 --- a/src/lib/Makefile.inc +++ b/src/lib/Makefile.inc @@ -19,6 +19,8 @@ subdirs-y += loaders bootblock-y += cbfs.c cbfs_core.c +bootblock-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c + bootblock-y += memchr.c bootblock-y += memcmp.c @@ -29,6 +31,7 @@ $(foreach arch,$(ARCH_SUPPORTED),\ romstage-$(CONFIG_I2C_TPM) += delay.c romstage-y += cbfs.c cbfs_core.c +romstage-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c romstage-$(CONFIG_COMPRESS_RAMSTAGE) += lzma.c lzmadecode.c romstage-$(CONFIG_CACHE_AS_RAM) += ramtest.c @@ -55,6 +58,7 @@ ramstage-y += delay.c ramstage-y += fallback_boot.c ramstage-y += compute_ip_checksum.c ramstage-y += cbfs.c cbfs_core.c +ramstage-$(CONFIG_COMMON_CBFS_SPI_WRAPPER) += cbfs_spi.c ramstage-y += lzma.c lzmadecode.c ramstage-y += stack.c ramstage-y += clog2.c diff --git a/src/lib/cbfs_spi.c b/src/lib/cbfs_spi.c new file mode 100644 index 0000000000..447153295f --- /dev/null +++ b/src/lib/cbfs_spi.c @@ -0,0 +1,95 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2014 Google 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 + */ + +/* + * This file provides a common CBFS wrapper for SPI storage. SPI driver + * context is expanded with the buffer descriptor used to store data read from + * SPI. + */ + +#include <cbfs.h> +#include <spi_flash.h> + +/* SPI flash as CBFS media. */ +struct cbfs_spi_context { + struct spi_flash *spi_flash_info; + struct cbfs_simple_buffer buffer; +}; + +static struct cbfs_spi_context spi_context; + +static int cbfs_media_open(struct cbfs_media *media) +{ + return 0; +} + +static int cbfs_media_close(struct cbfs_media *media) +{ + return 0; +} + +static size_t cbfs_media_read(struct cbfs_media *media, + void *dest, size_t offset, + size_t count) +{ + struct cbfs_spi_context *context = media->context; + + return context->spi_flash_info->read + (context->spi_flash_info, offset, count, dest) ? 0 : count; +} + +static void *cbfs_media_map(struct cbfs_media *media, + size_t offset, size_t count) +{ + struct cbfs_spi_context *context = media->context; + + return cbfs_simple_buffer_map(&context->buffer, media, offset, count); +} + +static void *cbfs_media_unmap(struct cbfs_media *media, + const void *address) +{ + struct cbfs_spi_context *context = media->context; + + return cbfs_simple_buffer_unmap(&context->buffer, address); +} + +int init_default_cbfs_media(struct cbfs_media *media) +{ + if (spi_context.buffer.buffer) + return 0; /* It has been already initialized. */ + + spi_context.spi_flash_info = spi_flash_probe + (CONFIG_BOOT_MEDIA_SPI_BUS, 0); + if (!spi_context.spi_flash_info) + return -1; + + spi_context.buffer.buffer = (void *)CONFIG_CBFS_CACHE_ADDRESS; + spi_context.buffer.size = CONFIG_CBFS_CACHE_SIZE; + + media->context = &spi_context; + + media->open = cbfs_media_open; + media->close = cbfs_media_close; + media->read = cbfs_media_read; + media->map = cbfs_media_map; + media->unmap = cbfs_media_unmap; + + return 0; +} |