This change adds support to field firmware update (ffu) for Samsung emmc
v4.5.
Samsung eMMC 4.5 FFU protocol is similar with eMMC 5.0 FFU without
MODE_OPERATION.
It uses the different EXT_CSD offset.
This patch depends on patch mmc: Support-FFU-for-eMMC-v5.0 committed by Avi
Shchislowski <avi.shchislowski@xxxxxxxxxxx>
---
drivers/mmc/card/Kconfig | 9 +++++
drivers/mmc/card/block.c | 8 ++++
drivers/mmc/card/ffu.c | 100
+++++++++++++++++++++++++++++++++++++++++++++++
include/linux/mmc/ffu.h | 14 +++++++
4 files changed, 131 insertions(+)
diff --git a/drivers/mmc/card/Kconfig b/drivers/mmc/card/Kconfig
index d1ea14f..4b0126d 100644
--- a/drivers/mmc/card/Kconfig
+++ b/drivers/mmc/card/Kconfig
@@ -76,3 +76,12 @@ config MMC_FFU
This is an option to run firmware update on eMMC 5.0.
Field firmware updates (FFU) enables features enhancement
in the field.
+
+config MMC_FFU_SAMSUNG45
+ bool "FFU SUPPORT for Samsung eMMC 4.5."
+ depends on MMC_FFU
+ default n
+ help
+ This is an option to run firmware update on Samsung eMMC 4.5.
+ Field firmware updates (FFU) enables features enhancment
+ in the field.
diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index e50cded..ca8ba57 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -536,6 +536,14 @@ static int mmc_blk_ioctl_cmd(struct block_device *bdev,
goto cmd_rel_host;
}
+#ifdef CONFIG_MMC_FFU_SAMSUNG45
+ if (cmd.opcode == MMC_FFU_SAMSUNG45_OP) {
+ err = mmc_ffu_execute(card, &cmd, idata->buf,
+ idata->buf_bytes);
+ goto cmd_rel_host;
+ }
+#endif
+
err = mmc_blk_part_switch(card, md);
if (err)
goto cmd_rel_host;
diff --git a/drivers/mmc/card/ffu.c b/drivers/mmc/card/ffu.c
index 092a791..a5eed6c 100644
--- a/drivers/mmc/card/ffu.c
+++ b/drivers/mmc/card/ffu.c
@@ -608,3 +608,103 @@ exit:
}
EXPORT_SYMBOL(mmc_ffu_install);
+#ifdef CONFIG_MMC_FFU_SAMSUNG45
+
+#define EXT_CSD_MODE_CONFIG_SAMSUNG45 133
+#define EXT_CSD_FFU_STATUS_SAMSUNG45 253
+
+int mmc_ffu_execute(struct mmc_card *card, struct mmc_command *cmd,
+ u8 *data, int buf_bytes)
+{
+ u8 ext_csd[CARD_BLOCK_SIZE];
+ int err;
+ int ret = 0;
+
+ /* Read the EXT_CSD */
+ err = mmc_send_ext_csd(card, ext_csd);
+ if (err) {
+ u32 status;
+ pr_err("FFU: %s: error %d sending ext_csd\n",
+ mmc_hostname(card->host), err);
+ goto exit;
+ }
+
+ /*
+ * Check Manufacturer ID and revision,
+ * This is only for Samsung eMMC 4.5
+ */
+ if (card->cid.manfid != CID_MANFID_SAMSUNG ||
+ card->ext_csd.rev != 6) {
+ err = -EINVAL;
+ pr_err("FFU: %s: error %d FFU is not supported\n",
+ mmc_hostname(card->host), err);
+ goto exit;
+ }
+
+ /* Check if FFU is supported by card */
+ if (!FFU_SUPPORTED_MODE(ext_csd[EXT_CSD_SUPPORTED_MODE])) {
+ err = -EINVAL;
+ pr_err("FFU: %s: error %d FFU is not supported\n",
+ mmc_hostname(card->host), err);
+ goto exit;
+ }
+
+ if (FFU_ENABLED(ext_csd[EXT_CSD_FW_CONFIG])) {
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_FW_CONFIG, MMC_FFU_ENABLE,
+ card->ext_csd.generic_cmd6_time);
+ if (err) {
+ pr_err("%s: switch to FFU failed with error %d\n",
+ mmc_hostname(card->host), err);
+ return err;
+ }
+ }
+
+ /* set device to FFU mode */
+ err = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_MODE_CONFIG_SAMSUNG45, MMC_FFU_MODE_SET,
+ card->ext_csd.generic_cmd6_time);
+ if (err) {
+ pr_err("FFU: %s: error %d FFU is not supported\n",
+ mmc_hostname(card->host), err);
+ goto exit;
+ }
+ cmd->arg = 0xc7810000;
+
+ err = mmc_ffu_write(card, data, cmd->arg, buf_bytes);
+
+ /* host switch back to work in normal MMC Read/Write commands */
+ ret = mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
+ EXT_CSD_MODE_CONFIG_SAMSUNG45, MMC_FFU_MODE_NORMAL,
+ card->ext_csd.generic_cmd6_time);
+ if (ret)
+ err = ret;
+
+ /* read ext_csd */
+ err = mmc_send_ext_csd(card, ext_csd);
+ if (err) {
+ pr_err("FFU: %s: error %d sending ext_csd\n",
+ mmc_hostname(card->host), err);
+ goto exit;
+ }
+
+ /* return status */
+ err = ext_csd[EXT_CSD_FFU_STATUS_SAMSUNG45];
+ if (!err) {
+ pr_err("FFU: %s: error %d FFU execute:\n",
+ mmc_hostname(card->host), err);
+ err = -EINVAL;
+ goto exit;
+ }
+ err = mmc_ffu_restart(card);
+ if (err) {
+ pr_err("FFU: %s: error %d FFU execute:\n",
+ mmc_hostname(card->host), err);
+ }
+exit:
+ return err;
+}
+EXPORT_SYMBOL(mmc_ffu_execute);
+
+#endif
+
diff --git a/include/linux/mmc/ffu.h b/include/linux/mmc/ffu.h
index 009e98b..abf56e6 100644
--- a/include/linux/mmc/ffu.h
+++ b/include/linux/mmc/ffu.h
@@ -27,6 +27,9 @@
*/
#define MMC_FFU_DOWNLOAD_OP 302
#define MMC_FFU_INSTALL_OP 303
+#ifdef CONFIG_MMC_FFU_SAMSUNG45
+#define MMC_FFU_SAMSUNG45_OP 304
+#endif
#define MMC_FFU_MODE_SET 0x1
#define MMC_FFU_MODE_NORMAL 0x0
@@ -47,6 +50,10 @@
int mmc_ffu_download(struct mmc_card *card, struct mmc_command *cmd,
u8 *data, int buf_bytes);
int mmc_ffu_install(struct mmc_card *card);
+#ifdef CONFIG_MMC_FFU_SAMSUNG45
+int mmc_ffu_execute(struct mmc_card *card, struct mmc_command *cmd,
+ u8 *data, int buf_bytes);
+#endif
#else
static inline int mmc_ffu_download(struct mmc_card *card,
struct mmc_command *cmd, u8 *data, int buf_bytes)
@@ -57,6 +64,13 @@ static inline int mmc_ffu_install(struct mmc_card *card)
{
return -ENOSYS;
}
+#ifdef CONFIG_MMC_FFU_SAMSUNG45
+static inline int mmc_ffu_execute(struct mmc_card *card,
+ struct mmc_command *cmd, u8 *data, int buf_bytes)
+{
+ return -ENOSYS;
+}
+#endif
#endif
#endif /* FFU_H_ */
--
1.8.3.2
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