This change adds support to field firmware update (ffu) for Samsung emmc
v5.0
Some of Samsung eMMC does not show the argument for ffu in ext_csd.
In case of this, eMMC shows 0x0 from ext_csd, Host has to modify the
argument.
And ffu for Samsung eMMC should transfer f/w through not multiple commands
but one command.
Because of f/w size, MMC_IOC_MAX_BYTES should be increased.
Usually normal io uses 512KB as the max chunk size,
So I think it does not cause the problem.
This patch depends on patch mmc: Support-FFU-for-eMMC-v5.0 committed by Avi
Shchislowski <avi.shchislowski@xxxxxxxxxxx>
---
drivers/mmc/card/ffu.c | 7 +++++++
include/linux/mmc/card.h | 1 +
include/uapi/linux/mmc/ioctl.h | 2 +-
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/mmc/card/ffu.c b/drivers/mmc/card/ffu.c
index 41aad31..092a791 100644
--- a/drivers/mmc/card/ffu.c
+++ b/drivers/mmc/card/ffu.c
@@ -444,6 +444,8 @@ static int mmc_host_set_ffu(struct mmc_card *card, u32
ffu_enable)
return 0;
}
+#define CID_MANFID_SAMSUNG 0x15
+
int mmc_ffu_download(struct mmc_card *card, struct mmc_command *cmd,
u8 *data, int buf_bytes)
{
@@ -490,6 +492,11 @@ int mmc_ffu_download(struct mmc_card *card, struct
mmc_command *cmd,
ext_csd[EXT_CSD_FFU_ARG + 2] << 16 |
ext_csd[EXT_CSD_FFU_ARG + 3] << 24;
+ /* If arg is zero, should be set to a special value for samsung eMMC
*/
+ if (card->quirks & MMC_QUIRK_SEC_FIX_FFU_ARG &&
+ card->cid.manfid == CID_MANFID_SAMSUNG && cmd->arg == 0x0)
+ cmd->arg = 0xc7810000;
+
err = mmc_ffu_write(card, data, cmd->arg, buf_bytes);
exit_normal:
diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h
index b730272..3e781f9 100644
--- a/include/linux/mmc/card.h
+++ b/include/linux/mmc/card.h
@@ -275,6 +275,7 @@ struct mmc_card {
#define MMC_QUIRK_LONG_READ_TIME (1<<9) /* Data read time >
CSD says */
#define MMC_QUIRK_SEC_ERASE_TRIM_BROKEN (1<<10) /* Skip secure for
erase/trim */
#define MMC_QUIRK_BROKEN_IRQ_POLLING (1<<11) /* Polling SDIO_CCCR_INTx
could create a fake interrupt */
+#define MMC_QUIRK_SEC_FIX_FFU_ARG (1<<12) /* Fix ffu argument */
unsigned int erase_size; /* erase size in sectors */
unsigned int erase_shift; /* if erase unit is power 2
*/
diff --git a/include/uapi/linux/mmc/ioctl.h b/include/uapi/linux/mmc/ioctl.h
index 1f5e689..af9ea62 100644
--- a/include/uapi/linux/mmc/ioctl.h
+++ b/include/uapi/linux/mmc/ioctl.h
@@ -53,5 +53,5 @@ struct mmc_ioc_cmd {
* is enforced per ioctl call. For larger data transfers, use the normal
* block device operations.
*/
-#define MMC_IOC_MAX_BYTES (512L * 256)
+#define MMC_IOC_MAX_BYTES (512L * 1024)
#endif /* LINUX_MMC_IOCTL_H */
--
1.8.3.2
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