mirrors/u-boot
0
0
Fork 0
mirror of https://github.com/u-boot/u-boot.git synced 2024-11-25 05:04:23 +08:00
Code Issues Packages Projects Releases Wiki Activity

MMC: APIs to support resize of EMMC boot partition

Browse Source 
This patch adds APIs to access(open / close) and to resize boot partiton of EMMC.

Signed-off-by: Amar <amarendra.xt@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
This commit is contained in:
Amar 2013-04-27 11:42:58 +05:30 committed by Minkyu Kang
parent 752f4c4a9c
commit 3690d6d66b
2 changed files with 160 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

134
drivers/mmc/mmc.c
View File

@ -1374,3 +1374,137 @@ int mmc_initialize(bd_t *bis)
return 0;
}
#ifdef CONFIG_SUPPORT_EMMC_BOOT
/*
* This function changes the size of boot partition and the size of rpmb
* partition present on EMMC devices.
*
* Input Parameters:
* struct *mmc: pointer for the mmc device strcuture
* bootsize: size of boot partition
* rpmbsize: size of rpmb partition
*
* Returns 0 on success.
*/
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;
}
/*
* This function shall form and send the commands to open / close the
* boot partition specified by user.
*
* Input Parameters:
* ack: 0x0 - No boot acknowledge sent (default)
* 0x1 - Boot acknowledge sent during boot operation
* part_num: User selects boot data that will be sent to master
* 0x0 - Device not boot enabled (default)
* 0x1 - Boot partition 1 enabled for boot
* 0x2 - Boot partition 2 enabled for boot
* access: User selects partitions to access
* 0x0 : No access to boot partition (default)
* 0x1 : R/W boot partition 1
* 0x2 : R/W boot partition 2
* 0x3 : R/W Replay Protected Memory Block (RPMB)
*
* Returns 0 on success.
*/
int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access)
{
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(ack) |
EXT_CSD_BOOT_PART_NUM(part_num) |
EXT_CSD_PARTITION_ACCESS(access)) << 8);
err = mmc_send_cmd(mmc, &cmd, NULL);
if (err) {
if (access) {
debug("mmc boot partition#%d open fail:Error1 = %d\n",
part_num, err);
} else {
debug("mmc boot partition#%d close fail:Error = %d\n",
part_num, err);
}
return err;
}
if (access) {
/* 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 partition#%d open fail:Error2 = %d\n",
part_num, err);
return err;
}
}
return 0;
}
#endif

26
include/mmc.h
View File

@ -92,6 +92,11 @@
#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
@ -159,6 +164,7 @@
*/
#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 */
@ -183,6 +189,16 @@
#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 EXT_CSD_BOOT_ACK(x) (x << 6)
#define EXT_CSD_BOOT_PART_NUM(x) (x << 3)
#define EXT_CSD_PARTITION_ACCESS(x) (x << 0)
#define R1_ILLEGAL_COMMAND (1 << 22)
#define R1_APP_CMD (1 << 5)
@ -210,6 +226,11 @@
/* Maximum block size for MMC */
#define MMC_MAX_BLOCK_LEN 512
/* The number of MMC physical partitions. These consist of:
* boot partitions (2), general purpose partitions (4) in MMC v4.4.
*/
#define MMC_NUM_BOOT_PARTITION 2
struct mmc_cid {
unsigned long psn;
unsigned short oid;
@ -286,6 +307,11 @@ int mmc_switch_part(int dev_num, unsigned int part_num);
int mmc_getcd(struct mmc *mmc);
int mmc_getwp(struct mmc *mmc);
void spl_mmc_load(void) __noreturn;
/* Function to change the size of boot partition and rpmb partitions */
int mmc_boot_partition_size_change(struct mmc *mmc, unsigned long bootsize,
unsigned long rpmbsize);
/* Function to send commands to open/close the specified boot partition */
int mmc_boot_part_access(struct mmc *mmc, u8 ack, u8 part_num, u8 access);
#ifdef CONFIG_GENERIC_MMC
#define mmc_host_is_spi(mmc) ((mmc)->host_caps & MMC_MODE_SPI)