[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 11:14:08 CEST 2021
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?
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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