[PATCH] mmc: Add support for enumerating MMC card in a given mode using mmc command
Jaehoon Chung
jh80.chung at samsung.com
Fri Jul 30 11:32:32 CEST 2021
On 7/30/21 6:20 PM, Aswath Govindraju wrote:
> Hi Jaehoon,
>
> On 30/07/21 2:44 pm, Jaehoon Chung wrote:
>> Hi Aswath,
>>
>> On 7/30/21 2:12 PM, Aswath Govindraju wrote:
>>> Hi Jaehoon,
>>>
>>> On 30/07/21 4:00 am, Jaehoon Chung wrote:
>>>> Hi Aswath,
>>>>
>>>> On 7/29/21 11:55 PM, 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.
>>>>
>>>> Thanks for this patch. It seems that it's useful to develope and debug.
>>>> I will test with this patch.
>>>>
>>>> Could you also update doc/usage/mmc.rst file?
>>>>
>>>
>>> Sure, I'll update it in the respin.
>>
>> When I have simply tested with this patch, it's not working correct.
>> I will test more and share them. Did you test about SD-card?
>>
>
> Yes, I tested with both SD-Card and eMMC.
>
> Also, please note that MMC_SPEED_MODE_SET has to be enabled in the
> defconfig files.
I did. :) (enabled MMC_SPEED_MODE_SET).
If it's not supported mode, it seems that always set to LEGACY mode. Is it intention behavior?
I will test on eMMC and SD. Well it will take a little time. Maybe Next week?
Best Regards,
Jaehoon Chung
>
> Thanks,
> Aswath
>
>> Best Regards,
>> Jaehoon Chung
>>
>>>
>>> Thanks,
>>> Aswath
>>>
>>>> Best Regards,
>>>> Jaehoo Chung
>>>>
>>>>>
>>>>> Signed-off-by: Aswath Govindraju <a-govindraju at ti.com>
>>>>> ---
>>>>> cmd/Kconfig | 10 ++++++
>>>>> cmd/mmc.c | 71 ++++++++++++++++++++++++++++------------
>>>>> drivers/mmc/mmc-uclass.c | 3 ++
>>>>> drivers/mmc/mmc.c | 18 ++++++++++
>>>>> include/mmc.h | 4 +++
>>>>> 5 files changed, 85 insertions(+), 21 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 b942576b58ac..073e87d69634 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 +136,11 @@ static struct mmc *init_mmc_device(int dev, bool force_init)
>>>>>
>>>>> if (force_init)
>>>>> mmc->has_init = 0;
>>>>> +
>>>>> +#if CONFIG_IS_ENABLED(MMC_SPEED_MODE_SET)
>>>>> + mmc->user_speed_mode = speed_mode;
>>>>> +#endif
>>>>> +
>>>>> if (mmc_init(mmc))
>>>>> return NULL;
>>>>>
>>>>> @@ -159,7 +166,7 @@ static int do_mmcinfo(struct cmd_tbl *cmdtp, int flag, int argc,
>>>>> }
>>>>> }
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -293,7 +300,7 @@ static int do_mmcrpmb(struct cmd_tbl *cmdtp, int flag,
>>>>> if (flag == CMD_FLAG_REPEAT && !cmd_is_repeatable(cp))
>>>>> return CMD_RET_SUCCESS;
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -338,7 +345,7 @@ static int do_mmc_read(struct cmd_tbl *cmdtp, int flag,
>>>>> blk = simple_strtoul(argv[2], NULL, 16);
>>>>> cnt = simple_strtoul(argv[3], NULL, 16);
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -387,7 +394,7 @@ static int do_mmc_sparse_write(struct cmd_tbl *cmdtp, int flag,
>>>>> return CMD_RET_FAILURE;
>>>>> }
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -431,7 +438,7 @@ static int do_mmc_write(struct cmd_tbl *cmdtp, int flag,
>>>>> blk = simple_strtoul(argv[2], NULL, 16);
>>>>> cnt = simple_strtoul(argv[3], NULL, 16);
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -460,7 +467,7 @@ static int do_mmc_erase(struct cmd_tbl *cmdtp, int flag,
>>>>> blk = simple_strtoul(argv[1], NULL, 16);
>>>>> cnt = simple_strtoul(argv[2], NULL, 16);
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -482,8 +489,19 @@ 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, MMC_MODES_END);
>>>>> + } else if (argc == 2) {
>>>>> + /* parse the mode */
>>>>> + speed_mode = simple_strtoul(argv[1], NULL, 10);
>>>>> + /* Need to pass the the speed mode required too */
>>>>> + 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;
>>>>>
>>>>> @@ -496,7 +514,7 @@ static int do_mmc_part(struct cmd_tbl *cmdtp, int flag,
>>>>> struct blk_desc *mmc_dev;
>>>>> struct mmc *mmc;
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -515,11 +533,14 @@ 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, MMC_MODES_END);
>>>>> } else if (argc == 2) {
>>>>> dev = simple_strtoul(argv[1], NULL, 10);
>>>>> + mmc = init_mmc_device(dev, true, MMC_MODES_END);
>>>>> } else if (argc == 3) {
>>>>> dev = (int)simple_strtoul(argv[1], NULL, 10);
>>>>> part = (int)simple_strtoul(argv[2], NULL, 10);
>>>>> @@ -528,11 +549,16 @@ static int do_mmc_dev(struct cmd_tbl *cmdtp, int flag,
>>>>> PART_ACCESS_MASK);
>>>>> return CMD_RET_FAILURE;
>>>>> }
>>>>> + mmc = init_mmc_device(dev, true, MMC_MODES_END);
>>>>> + } else if (argc == 4) {
>>>>> + dev = (int)simple_strtoul(argv[1], NULL, 10);
>>>>> + part = (int)simple_strtoul(argv[2], NULL, 10);
>>>>> + speed_mode = simple_strtoul(argv[3], NULL, 10);
>>>>> + mmc = init_mmc_device(curr_device, true, speed_mode);
>>>>> } else {
>>>>> return CMD_RET_USAGE;
>>>>> }
>>>>>
>>>>> - mmc = init_mmc_device(dev, true);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -636,7 +662,7 @@ static int do_mmc_hwpartition(struct cmd_tbl *cmdtp, int flag,
>>>>> enum mmc_hwpart_conf_mode mode = MMC_HWPART_CONF_CHECK;
>>>>> int i, r, pidx;
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -726,7 +752,7 @@ static int do_mmc_bootbus(struct cmd_tbl *cmdtp, int flag,
>>>>> reset = simple_strtoul(argv[3], NULL, 10);
>>>>> mode = simple_strtoul(argv[4], NULL, 10);
>>>>>
>>>>> - mmc = init_mmc_device(dev, false);
>>>>> + mmc = init_mmc_device(dev, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -789,7 +815,7 @@ static int do_mmc_boot_resize(struct cmd_tbl *cmdtp, int flag,
>>>>> bootsize = simple_strtoul(argv[2], NULL, 10);
>>>>> rpmbsize = simple_strtoul(argv[3], NULL, 10);
>>>>>
>>>>> - mmc = init_mmc_device(dev, false);
>>>>> + mmc = init_mmc_device(dev, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -844,7 +870,7 @@ static int do_mmc_partconf(struct cmd_tbl *cmdtp, int flag,
>>>>>
>>>>> dev = simple_strtoul(argv[1], NULL, 10);
>>>>>
>>>>> - mmc = init_mmc_device(dev, false);
>>>>> + mmc = init_mmc_device(dev, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -887,7 +913,7 @@ static int do_mmc_rst_func(struct cmd_tbl *cmdtp, int flag,
>>>>> return CMD_RET_USAGE;
>>>>> }
>>>>>
>>>>> - mmc = init_mmc_device(dev, false);
>>>>> + mmc = init_mmc_device(dev, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -939,7 +965,7 @@ static int do_mmc_bkops_enable(struct cmd_tbl *cmdtp, int flag,
>>>>>
>>>>> dev = simple_strtoul(argv[1], NULL, 10);
>>>>>
>>>>> - mmc = init_mmc_device(dev, false);
>>>>> + mmc = init_mmc_device(dev, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>>
>>>>> @@ -958,7 +984,7 @@ static int do_mmc_boot_wp(struct cmd_tbl *cmdtp, int flag,
>>>>> int err;
>>>>> struct mmc *mmc;
>>>>>
>>>>> - mmc = init_mmc_device(curr_device, false);
>>>>> + mmc = init_mmc_device(curr_device, false, MMC_MODES_END);
>>>>> if (!mmc)
>>>>> return CMD_RET_FAILURE;
>>>>> if (IS_SD(mmc)) {
>>>>> @@ -983,9 +1009,9 @@ 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 +1068,12 @@ 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"
>>>>> + " [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"
>>>>> "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..66fe8bed984b 100644
>>>>> --- a/drivers/mmc/mmc-uclass.c
>>>>> +++ b/drivers/mmc/mmc-uclass.c
>>>>> @@ -415,6 +415,9 @@ int mmc_bind(struct udevice *dev, struct mmc *mmc, const struct mmc_config *cfg)
>>>>> bdesc->part_type = cfg->part_type;
>>>>> mmc->dev = dev;
>>>>>
>>>>> +#if CONFIG_IS_ENABLED(MMC_SPEED_MODE_SET)
>>>>> + mmc->user_speed_mode = MMC_MODES_END;
>>>>> +#endif
>>>>> return 0;
>>>>> }
>>>>>
>>>>> diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
>>>>> index 8078a89f18cb..b24a45d458d4 100644
>>>>> --- a/drivers/mmc/mmc.c
>>>>> +++ b/drivers/mmc/mmc.c
>>>>> @@ -2863,6 +2863,24 @@ int mmc_start_init(struct mmc *mmc)
>>>>> */
>>>>> mmc->host_caps = mmc->cfg->host_caps | MMC_CAP(MMC_LEGACY) |
>>>>> MMC_CAP(MMC_LEGACY) | MMC_MODE_1BIT;
>>>>> +
>>>>> +#if CONFIG_IS_ENABLED(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_CAP(MMC_LEGACY) | MMC_MODE_1BIT);
>>>>> + } else {
>>>>> + pr_err("bus_mode requested is not supported\n");
>>>>> + return -EINVAL;
>>>>> + }
>>>>> + }
>>>>> +#endif
>>>>> #if CONFIG_IS_ENABLED(DM_MMC)
>>>>> mmc_deferred_probe(mmc);
>>>>> #endif
>>>>> diff --git a/include/mmc.h b/include/mmc.h
>>>>> index 0bf19de20e52..e64ef7611dd7 100644
>>>>> --- a/include/mmc.h
>>>>> +++ b/include/mmc.h
>>>>> @@ -726,6 +726,10 @@ struct mmc {
>>>>> */
>>>>> u32 quirks;
>>>>> u8 hs400_tuning;
>>>>> +
>>>>> +#if CONFIG_IS_ENABLED(MMC_SPEED_MODE_SET)
>>>>> + enum bus_mode user_speed_mode;
>>>>> +#endif
>>>>> };
>>>>>
>>>>> #if CONFIG_IS_ENABLED(DM_MMC)
>>>>>
>>>>
>>>
>>>
>>
>
>
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