[U-Boot] [PATCH V4 7/9] MMC: APIs to support resize of EMMC boot partition

Jaehoon Chung
2013-01-04T10:27:05Z

Hi Amar,

I wonder that include the moviNAND specific code in mmc.c?
mmc_boot_partiton_size_change() looks like every vendor can use this function.

Best Regards,
Jaehoon Chung

On 01/04/2013 06:34 PM, Amar wrote:
> This patch adds APIs to open, close and to resize boot partiton for EMMC.
>
> Changes from V1:
> New patch.
>
> Changes from V2:
> 1)Updation of commit message and resubmition of proper patch set.
>
> Changes from V3:
> No change.
>
> Signed-off-by: Amar <amarendra.xt@samsung.com>
> ---
> drivers/mmc/mmc.c | 118 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
> include/mmc.h | 16 ++++++++
> 2 files changed, 134 insertions(+)
>
> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
> index 72e8ce6..8175b49 100644
> --- a/drivers/mmc/mmc.c
> +++ b/drivers/mmc/mmc.c
> @@ -1327,3 +1327,121 @@ int mmc_initialize(bd_t *bis)
>
> return 0;
> }
> +
> +int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
> + unsigned long rpmbsize)
> +{
> + int err;
> + struct mmc_cmd cmd;
> +
> + /* Only use this command for raw EMMC moviNAND */
> + /* Enter backdoor mode */
> + cmd.cmdidx = MMC_CMD_RES_MAN;
> + cmd.resp_type = MMC_RSP_R1b;
> + cmd.cmdarg = MMC_CMD62_ARG1;
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_partition_size_change: Error1 = %d\n", err);
> + return err;
> + }
> +
> + /* Boot partition changing mode */
> + cmd.cmdidx = MMC_CMD_RES_MAN;
> + cmd.resp_type = MMC_RSP_R1b;
> + cmd.cmdarg = MMC_CMD62_ARG2;
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_partition_size_change: Error2 = %d\n", err);
> + return err;
> + }
> + /* boot partition size is multiple of 128KB */
> + bootsize = ((bootsize*1024)/128);
> +
> + /* Arg: boot partition size */
> + cmd.cmdidx = MMC_CMD_RES_MAN;
> + cmd.resp_type = MMC_RSP_R1b;
> + cmd.cmdarg = bootsize;
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_partition_size_change: Error3 = %d\n", err);
> + return err;
> + }
> + /* RPMB partition size is multiple of 128KB */
> + rpmbsize = ((rpmbsize*1024)/128);
> + /* Arg: RPMB partition size */
> + cmd.cmdidx = MMC_CMD_RES_MAN;
> + cmd.resp_type = MMC_RSP_R1b;
> + cmd.cmdarg = rpmbsize;
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_partition_size_change: Error4 = %d\n", err);
> + return err;
> + }
> + return 0;
> +}
> +
> +int mmc_boot_open(struct mmc *mmc)
> +{
> + int err;
> + struct mmc_cmd cmd;
> +
> + /* Boot ack enable, boot partition enable , boot partition access */
> + cmd.cmdidx = MMC_CMD_SWITCH;
> + cmd.resp_type = MMC_RSP_R1b;
> +
> + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24 |
> + EXT_CSD_PART_CONF << 16 |
> + (EXT_CSD_BOOT_ACK_ENABLE |
> + EXT_CSD_BOOT_PARTITION_ENABLE |
> + EXT_CSD_PARTITION_ACCESS_ENABLE) << 8);
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_open: Error1 = %d\n", err);
> + return err;
> + }
> +
> + /* 4bit transfer mode at booting time. */
> + cmd.cmdidx = MMC_CMD_SWITCH;
> + cmd.resp_type = MMC_RSP_R1b;
> +
> + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24|
> + EXT_CSD_BOOT_BUS_WIDTH << 16|
> + ((1<<0) << 8));
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_open: Error2 = %d\n", err);
> + return err;
> + }
> +
> + return 0;
> +}
> +
> +int mmc_boot_close(struct mmc *mmc)
> +{
> + int err;
> + struct mmc_cmd cmd;
> +
> + /* Boot ack enable, boot partition enable , boot partition access */
> + cmd.cmdidx = MMC_CMD_SWITCH;
> + cmd.resp_type = MMC_RSP_R1b;
> +
> + cmd.cmdarg = (MMC_SWITCH_MODE_WRITE_BYTE << 24|
> + EXT_CSD_PART_CONF << 16|
> + (EXT_CSD_BOOT_ACK_ENABLE |
> + EXT_CSD_BOOT_PARTITION_ENABLE |
> + EXT_CSD_PARTITION_ACCESS_DISABLE) << 8);
> +
> + err = mmc_send_cmd(mmc, &cmd, NULL);
> + if (err) {
> + debug("mmc_boot_close: Error = %d\n", err);
> + return err;
> + }
> +
> + return 0;
> +}
> diff --git a/include/mmc.h b/include/mmc.h
> index a13e2bd..999f0a3 100644
> --- a/include/mmc.h
> +++ b/include/mmc.h
> @@ -86,6 +86,11 @@
> #define MMC_CMD_APP_CMD 55
> #define MMC_CMD_SPI_READ_OCR 58
> #define MMC_CMD_SPI_CRC_ON_OFF 59
> +#define MMC_CMD_RES_MAN 62
> +
> +#define MMC_CMD62_ARG1 0xefac62ec
> +#define MMC_CMD62_ARG2 0xcbaea7
> +
>
> #define SD_CMD_SEND_RELATIVE_ADDR 3
> #define SD_CMD_SWITCH_FUNC 6
> @@ -153,6 +158,7 @@
> */
> #define EXT_CSD_PARTITIONING_SUPPORT 160 /* RO */
> #define EXT_CSD_ERASE_GROUP_DEF 175 /* R/W */
> +#define EXT_CSD_BOOT_BUS_WIDTH 177
> #define EXT_CSD_PART_CONF 179 /* R/W */
> #define EXT_CSD_BUS_WIDTH 183 /* R/W */
> #define EXT_CSD_HS_TIMING 185 /* R/W */
> @@ -177,6 +183,12 @@
> #define EXT_CSD_BUS_WIDTH_4 1 /* Card is in 4 bit mode */
> #define EXT_CSD_BUS_WIDTH_8 2 /* Card is in 8 bit mode */
>
> +#define EXT_CSD_BOOT_ACK_ENABLE (1<<6)
> +#define EXT_CSD_BOOT_PARTITION_ENABLE (1<<3)
> +#define EXT_CSD_PARTITION_ACCESS_ENABLE (1<<0)
> +#define EXT_CSD_PARTITION_ACCESS_DISABLE (0<<0)
> +
> +
> #define R1_ILLEGAL_COMMAND (1 << 22)
> #define R1_APP_CMD (1 << 5)
>
> @@ -275,6 +287,10 @@ int board_mmc_getcd(struct mmc *mmc);
> int mmc_switch_part(int dev_num, unsigned int part_num);
> int mmc_getcd(struct mmc *mmc);
> void spl_mmc_load(void) __noreturn;
> +int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
> + unsigned long rpmbsize);
> +int mmc_boot_open(struct mmc *mmc);
> +int mmc_boot_close(struct mmc *mmc);
>
> #ifdef CONFIG_GENERIC_MMC
> #define mmc_host_is_spi(mmc) ((mmc)->host_caps & MMC_MODE_SPI)
>