[PATCH v4 1/2] mmc: Add support for enumerating MMC card in a given mode using mmc command
Jaehoon Chung
jh80.chung at samsung.com
Fri Sep 3 01:06:41 CEST 2021
On 8/30/21 1:18 PM, Aswath Govindraju wrote:
> Hi Jaehoon,
>
> On 28/08/21 10:09 am, Jaehoon Chung wrote:
>> Hi Aswath,
>>
>> On 8/14/21 2:34 AM, Aswath Govindraju wrote:
>>> Add support for enumerating MMC card in a given mode using mmc rescan and
>>> mmc dev commands. The speed mode is provided as the last argument in these
>>> commands and is indicated using the index from enum bus_mode in
>>> include/mmc.h. A speed mode can be set only if it has already been enabled
>>> in the device tree.
>>
>> Sorry for replying too late. I have tested with your patch.
>>
>> It's confused the usage.
>>
>>>
>>> Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>
>>> ---
>>> cmd/Kconfig | 10 ++++++++
>>> cmd/mmc.c | 52 +++++++++++++++++++++++++++++++++-------
>>> drivers/mmc/mmc-uclass.c | 5 +++-
>>> drivers/mmc/mmc.c | 22 ++++++++++++++++-
>>> include/mmc.h | 2 ++
>>> 5 files changed, 81 insertions(+), 10 deletions(-)
>>>
>>> diff --git a/cmd/Kconfig b/cmd/Kconfig
>>> index ffef3cc76ca4..3a857b3f6e2e 100644
>>> --- a/cmd/Kconfig
>>> +++ b/cmd/Kconfig
>>> @@ -2389,4 +2389,14 @@ config CMD_UBIFS
>>> help
>>> UBIFS is a file system for flash devices which works on top of UBI.
>>>
>>> +config MMC_SPEED_MODE_SET
>>> + bool "set speed mode using mmc command"
>>> + depends on CMD_MMC
>>> + default n
>>> + help
>>> + Enable setting speed mode using mmc rescan and mmc dev commands.
>>> + The speed mode is provided as the last argument in these commands
>>> + and is indicated using the index from enum bus_mode in
>>> + include/mmc.h. A speed mode can be set only if it has already
>>> + been enabled in the device tree.
>>> endmenu
>>> diff --git a/cmd/mmc.c b/cmd/mmc.c
>>> index c67ad7624227..f1e30d0cf64b 100644
>>> --- a/cmd/mmc.c
>>> +++ b/cmd/mmc.c
>>> @@ -120,7 +120,9 @@ static void print_mmcinfo(struct mmc *mmc)
>>> }
>>> }
>>> }
>>> -static struct mmc *init_mmc_device(int dev, bool force_init)
>>> +
>>> +static struct mmc *__init_mmc_device(int dev, bool force_init,
>>> + enum bus_mode speed_mode)
>>> {
>>> struct mmc *mmc;
>>> mmc = find_mmc_device(dev);
>>> @@ -134,6 +136,10 @@ static struct mmc *init_mmc_device(int dev, bool force_init)
>>>
>>> if (force_init)
>>> mmc->has_init = 0;
>>> +
>>> + if (IS_ENABLED(CONFIG_MMC_SPEED_MODE_SET))
>>> + mmc->user_speed_mode = speed_mode;
>>> +
>>> if (mmc_init(mmc))
>>> return NULL;
>>>
>>> @@ -145,6 +151,11 @@ static struct mmc *init_mmc_device(int dev, bool force_init)
>>> return mmc;
>>> }
>>>
>>> +static struct mmc *init_mmc_device(int dev, bool force_init)
>>> +{
>>> + return __init_mmc_device(dev, force_init, MMC_MODES_END);
>>> +}
>>> +
>>> static int do_mmcinfo(struct cmd_tbl *cmdtp, int flag, int argc,
>>> char *const argv[])
>>> {
>>> @@ -482,8 +493,17 @@ static int do_mmc_rescan(struct cmd_tbl *cmdtp, int flag,
>>> int argc, char *const argv[])
>>> {
>>> struct mmc *mmc;
>>> + enum bus_mode speed_mode = MMC_MODES_END;
>>> +
>>> + if (argc == 1) {
>>> + mmc = init_mmc_device(curr_device, true);
>>> + } else if (argc == 2) {
>>> + speed_mode = (int)dectoul(argv[1], NULL);
>>> + mmc = __init_mmc_device(curr_device, true, speed_mode);
>>> + } else {
>>> + return CMD_RET_USAGE;
>>> + }
>>>
>>> - mmc = init_mmc_device(curr_device, true);
>>> if (!mmc)
>>> return CMD_RET_FAILURE;
>>>
>>> @@ -515,11 +535,14 @@ static int do_mmc_dev(struct cmd_tbl *cmdtp, int flag,
>>> {
>>> int dev, part = 0, ret;
>>> struct mmc *mmc;
>>> + enum bus_mode speed_mode = MMC_MODES_END;
>>>
>>> if (argc == 1) {
>>> dev = curr_device;
>>> + mmc = init_mmc_device(dev, true);
>>> } else if (argc == 2) {
>>> - dev = dectoul(argv[1], NULL);
>>> + dev = (int)dectoul(argv[1], NULL);
>>> + mmc = init_mmc_device(dev, true);
>>> } else if (argc == 3) {
>>> dev = (int)dectoul(argv[1], NULL);
>>> part = (int)dectoul(argv[2], NULL);
>>> @@ -528,11 +551,21 @@ static int do_mmc_dev(struct cmd_tbl *cmdtp, int flag,
>>> PART_ACCESS_MASK);
>>> return CMD_RET_FAILURE;
>>> }
>>> + mmc = init_mmc_device(dev, true);
>>> + } else if (argc == 4) {
>>> + dev = (int)dectoul(argv[1], NULL);
>>> + part = (int)dectoul(argv[2], NULL);
>>> + if (part > PART_ACCESS_MASK) {
>>> + printf("#part_num shouldn't be larger than %d\n",
>>> + PART_ACCESS_MASK);
>>> + return CMD_RET_FAILURE;
>>> + }
>>> + speed_mode = (int)dectoul(argv[3], NULL);
>>> + mmc = __init_mmc_device(dev, true, speed_mode);
>>> } else {
>>> return CMD_RET_USAGE;
>>> }
>>>
>>> - mmc = init_mmc_device(dev, true);
>>> if (!mmc)
>>> return CMD_RET_FAILURE;
>>>
>>> @@ -983,9 +1016,9 @@ static struct cmd_tbl cmd_mmc[] = {
>>> #if CONFIG_IS_ENABLED(CMD_MMC_SWRITE)
>>> U_BOOT_CMD_MKENT(swrite, 3, 0, do_mmc_sparse_write, "", ""),
>>> #endif
>>> - U_BOOT_CMD_MKENT(rescan, 1, 1, do_mmc_rescan, "", ""),
>>> + U_BOOT_CMD_MKENT(rescan, 2, 1, do_mmc_rescan, "", ""),
>>> U_BOOT_CMD_MKENT(part, 1, 1, do_mmc_part, "", ""),
>>> - U_BOOT_CMD_MKENT(dev, 3, 0, do_mmc_dev, "", ""),
>>> + U_BOOT_CMD_MKENT(dev, 4, 0, do_mmc_dev, "", ""),
>>> U_BOOT_CMD_MKENT(list, 1, 1, do_mmc_list, "", ""),
>>> #if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING)
>>> U_BOOT_CMD_MKENT(hwpartition, 28, 0, do_mmc_hwpartition, "", ""),
>>> @@ -1042,9 +1075,12 @@ U_BOOT_CMD(
>>> "mmc swrite addr blk#\n"
>>> #endif
>>> "mmc erase blk# cnt\n"
>>> - "mmc rescan\n"
>>> + "mmc rescan [mode]\n"
>>> "mmc part - lists available partition on current mmc device\n"
>>> - "mmc dev [dev] [part] - show or set current mmc device [partition]\n"
>>> + "mmc dev [dev] [part] [mode] - show or set current mmc device [partition] and set mode\n"
>>> + " - the required speed mode is passed as the index from the following list\n"
> [1]
>
>>> + " [MMC_LEGACY, MMC_HS, SD_HS, MMC_HS_52, MMC_DDR_52, UHS_SDR12, UHS_SDR25,\n"
>>> + " UHS_SDR50, UHS_DDR50, UHS_SDR104, MMC_HS_200, MMC_HS_400, MMC_HS_400_ES]\n"
>>
>> If developer doesn't read a doc file, it's difficult to know the number of mode.
>> Because this usage seems that [mode] can be passed by string.
>>
>> When i have tested with your patch, I have run the below command.
>> # mmc rescan MMC_HS_52
>> - but it's always set to legacy mode. So I thought this was not working fine.
>> But I have changed to input 3 instead of MMC_HS_52. It's working
>> # mmc rescan 3
>>
>> Is my test right?
>>
>
> Yes, that is correct. The index of the speed mode has be provided[1].
Thanks! It's my mis-reading. :)
It's working fine.
Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
Tested-by: Jaehoon Chung <jh80.chung at samsung.com>
Best Regards,
Jaehoon Chung
>
> Thanks,
> Aswath
>
>> Best Regards,
>> Jaehoon Chung
>>
>>> "mmc list - lists available devices\n"
>>> "mmc wp - power on write protect boot partitions\n"
>>> #if CONFIG_IS_ENABLED(MMC_HW_PARTITIONING)
>>> diff --git a/drivers/mmc/mmc-uclass.c b/drivers/mmc/mmc-uclass.c
>>> index 0e13238c7e7a..3ee92d03ca23 100644
>>> --- a/drivers/mmc/mmc-uclass.c
>>> +++ b/drivers/mmc/mmc-uclass.c
>>> @@ -342,6 +342,9 @@ void mmc_do_preinit(void)
>>>
>>> if (!m)
>>> continue;
>>> +
>>> + m->user_speed_mode = MMC_MODES_END; /* Initialising user set speed mode */
>>> +
>>> if (m->preinit)
>>> mmc_start_init(m);
>>> }
>>> @@ -414,7 +417,7 @@ int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
>>> /* setup initial part type */
>>> bdesc->part_type = cfg->part_type;
>>> mmc->dev = dev;
>>> -
>>> + mmc->user_speed_mode = MMC_MODES_END;
>>> return 0;
>>> }
>>>
>>> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
>>> index 8078a89f18cb..bd348974ae7d 100644
>>> --- a/drivers/mmc/mmc.c
>>> +++ b/drivers/mmc/mmc.c
>>> @@ -2862,7 +2862,25 @@ int mmc_start_init(struct mmc *mmc)
>>> * timings.
>>> */
>>> mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(MMC_LEGACY) |
>>> - MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT;
>>> + MMC_MODE_1BIT;
>>> +
>>> + if (IS_ENABLED(CONFIG_MMC_SPEED_MODE_SET)) {
>>> + if (mmc->user_speed_mode != MMC_MODES_END) {
>>> + int i;
>>> + /* set host caps */
>>> + if (mmc->host_caps & MMC_CAP(mmc->user_speed_mode)) {
>>> + /* Remove all existing speed capabilities */
>>> + for (i = MMC_LEGACY; i < MMC_MODES_END; i++)
>>> + mmc->host_caps &= ~MMC_CAP(i);
>>> + mmc->host_caps |= (MMC_CAP(mmc->user_speed_mode)
>>> + | MMC_CAP(MMC_LEGACY) |
>>> + MMC_MODE_1BIT);
>>> + } else {
>>> + pr_err("bus_mode requested is not supported\n");
>>> + return -EINVAL;
>>> + }
>>> + }
>>> + }
>>> #if CONFIG_IS_ENABLED(DM_MMC)
>>> mmc_deferred_probe(mmc);
>>> #endif
>>> @@ -3060,6 +3078,8 @@ int mmc_init_device(int num)
>>> }
>>>
>>> m = mmc_get_mmc_dev(dev);
>>> + m->user_speed_mode = MMC_MODES_END; /* Initialising user set speed mode */
>>> +
>>> if (!m)
>>> return 0;
>>> if (m->preinit)
>>> diff --git a/include/mmc.h b/include/mmc.h
>>> index 0bf19de20e52..b92e25534021 100644
>>> --- a/include/mmc.h
>>> +++ b/include/mmc.h
>>> @@ -726,6 +726,8 @@ struct mmc {
>>> */
>>> u32 quirks;
>>> u8 hs400_tuning;
>>> +
>>> + enum bus_mode user_speed_mode; /* input speed mode from user */
>>> };
>>>
>>> #if CONFIG_IS_ENABLED(DM_MMC)
>>>
>>
>
>
More information about the U-Boot
mailing list