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

Amarendra Reddy
2013-01-07T04:19:50Z

Hi Jaehoon,

Yes, the functions mmc_boot_partiton_size_change(), mmc_boot_open()
& mmc_boot_close() can be used
by any vendor to open/close/resize-boot-partition of emmc device.
The above 3 functions call the static function "static int
mmc_send_cmd(...)" located in drivers/mmc/mmc.c.
Any vendor can use the above 3 functions, if placed in drivers/mmc/mmc.c.

Thanks & Regards
Amarendra Reddy

On 4 January 2013 15:57, Jaehoon Chung <jh80.chung@samsung.com> wrote:

> 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)
> >
>
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