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cmd: mmc: provide boot area protection command

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Provide command 'mmc wp' to power on write protect boot areas on eMMC
devices.

The B_PWR_WP_EN bit in the extended CSD register BOOT_WP is set. The boot
area are write protected until the next power cycle occurs.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt
2020-03-30 07:24:19 +02:00
committed by Peng Fan
parent d5210e4589
commit 0469d84636
3 changed files with 36 additions and 0 deletions
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9
include/mmc.h
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@@ -907,6 +907,15 @@ struct blk_desc *mmc_get_blk_desc(struct mmc *mmc);
*/
int mmc_send_ext_csd(struct mmc *mmc, u8 *ext_csd);
/**
* mmc_boot_wp() - power on write protect boot partitions
*
* The boot partitions are write protected until the next power cycle.
*
* Return: 0 for success
*/
int mmc_boot_wp(struct mmc *mmc);
static inline enum dma_data_direction mmc_get_dma_dir(struct mmc_data *data)
{
return data->flags & MMC_DATA_WRITE ? DMA_TO_DEVICE : DMA_FROM_DEVICE;