[U-Boot] [PATCH V4 7/9] MMC: APIs to support resize of EMMC boot partition
Jaehoon Chung
jh80.chung at samsung.com
Mon Jan 7 05:34:08 CET 2013
Hi Amar,
If you want to access the boot partition, Need to add open/close()?
I think we can use like "mmc_boot_part_access(struct mmc *mmc, int ack, int part_num, int access)"
How about this? i think it is more generic...
On 01/07/2013 01:19 PM, Amarendra Reddy wrote:
> 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.
How can any vendor use with resize-boot-partition?
you used the vendor command.(you added the comment "Only use this command for raw eMMC moviNAND")
And i think good that these functions are used with cmd_mmc.
Best Regards,
Jaehoon Chung
> 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 at 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 at 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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>
>
>
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