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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