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authorFurquan Shaikh <furquan@chromium.org>2016-11-20 21:04:00 -0800
committerFurquan Shaikh <furquan@google.com>2016-11-22 17:32:09 +0100
commitc28984d9ea08e7d995ef9fc8064c10ec0c0d9d77 (patch)
treec113582c3d2d8fb8d54a4c9a53375340fcc302d5 /src/soc/intel/apollolake
parent282c8322791800ee0d732fdaa5eb2cd8f7effd58 (diff)
downloadcoreboot-c28984d9ea08e7d995ef9fc8064c10ec0c0d9d77.tar.xz
spi: Clean up SPI flash driver interface
RW flag was added to spi_slave structure to get around a requirement on some AMD flash controllers that need to group together all spi volatile operations (write/erase). This rw flag is not a property or attribute of the SPI slave or controller. Thus, instead of saving it in spi_slave structure, clean up the SPI flash driver interface. This allows chipsets/mainboards (that require volatile operations to be grouped) to indicate beginning and end of such grouped operations. New user APIs are added to allow users to perform probe, read, write, erase, volatile group begin and end operations. Callbacks defined in spi_flash structure are expected to be used only by the SPI flash driver. Any chipset that requires grouping of volatile operations can select the newly added Kconfig option SPI_FLASH_HAS_VOLATILE_GROUP and define callbacks for chipset_volatile_group_{begin,end}. spi_claim_bus/spi_release_bus calls have been removed from the SPI flash chip drivers which end up calling do_spi_flash_cmd since it already has required calls for claiming and releasing SPI bus before performing a read/write operation. BUG=None BRANCH=None TEST=Compiles successfully. Change-Id: Idfc052e82ec15b6c9fa874cee7a61bd06e923fbf Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17462 Tested-by: build bot (Jenkins) Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Diffstat (limited to 'src/soc/intel/apollolake')
-rw-r--r--src/soc/intel/apollolake/spi.c22
1 files changed, 13 insertions, 9 deletions
diff --git a/src/soc/intel/apollolake/spi.c b/src/soc/intel/apollolake/spi.c
index d60176a9aa..018572cfab 100644
--- a/src/soc/intel/apollolake/spi.c
+++ b/src/soc/intel/apollolake/spi.c
@@ -19,12 +19,14 @@
#include <arch/early_variables.h>
#include <arch/io.h>
+#include <console/console.h>
#include <device/device.h>
#include <device/pci.h>
#include <soc/intel/common/spi.h>
#include <soc/pci_devs.h>
#include <soc/spi.h>
#include <spi_flash.h>
+#include <spi-generic.h>
#include <stdlib.h>
#include <string.h>
@@ -224,7 +226,8 @@ void spi_release_bus(struct spi_slave *slave)
/* No magic needed here. */
}
-static int nuclear_spi_erase(struct spi_flash *flash, uint32_t offset, size_t len)
+static int nuclear_spi_erase(const struct spi_flash *flash, uint32_t offset,
+ size_t len)
{
int ret;
size_t erase_size;
@@ -274,7 +277,8 @@ static size_t get_xfer_len(uint32_t addr, size_t len)
return xfer_len;
}
-static int nuclear_spi_read(struct spi_flash *flash, uint32_t addr, size_t len, void *buf)
+static int nuclear_spi_read(const struct spi_flash *flash, uint32_t addr,
+ size_t len, void *buf)
{
int ret;
size_t xfer_len;
@@ -300,8 +304,8 @@ static int nuclear_spi_read(struct spi_flash *flash, uint32_t addr, size_t len,
return SUCCESS;
}
-static int nuclear_spi_write(struct spi_flash *flash,
- uint32_t addr, size_t len, const void *buf)
+static int nuclear_spi_write(const struct spi_flash *flash, uint32_t addr,
+ size_t len, const void *buf)
{
int ret;
size_t xfer_len;
@@ -326,7 +330,7 @@ static int nuclear_spi_write(struct spi_flash *flash,
return SUCCESS;
}
-static int nuclear_spi_status(struct spi_flash *flash, uint8_t *reg)
+static int nuclear_spi_status(const struct spi_flash *flash, uint8_t *reg)
{
int ret;
BOILERPLATE_CREATE_CTX(ctx);
@@ -379,10 +383,10 @@ static struct spi_flash *nuclear_flash_probe(struct spi_slave *spi)
* flash->status_cmd = ???
*/
- flash->write = nuclear_spi_write;
- flash->erase = nuclear_spi_erase;
- flash->read = nuclear_spi_read;
- flash->status = nuclear_spi_status;
+ flash->internal_write = nuclear_spi_write;
+ flash->internal_erase = nuclear_spi_erase;
+ flash->internal_read = nuclear_spi_read;
+ flash->internal_status = nuclear_spi_status;
return flash;
}