[PATCH] mmc: Add support for enumerating MMC card in a given mode using mmc command
Aswath Govindraju
a-govindraju at ti.com
Fri Jul 30 11:20:50 CEST 2021
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.
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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