[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 07:10:55 CEST 2021
Hi Ashok,
On 30/07/21 10:17 am, Ashok Reddy Soma wrote:
> Hi Aswath,
>
>> -----Original Message-----
>> From: Aswath Govindraju <a-govindraju at ti.com>
>> Sent: Thursday, July 29, 2021 8:25 PM
>> Cc: Lokesh Vutla <lokeshvutla at ti.com>; Vignesh Raghavendra
>> <vigneshr at ti.com>; Kishon Vijay Abraham I <kishon at ti.com>; Aswath
>> Govindraju <a-govindraju at ti.com>; Peng Fan <peng.fan at nxp.com>; Jaehoon
>> Chung <jh80.chung at samsung.com>; Simon Glass <sjg at chromium.org>;
>> Heinrich Schuchardt <xypron.glpk at gmx.de>; Bin Meng
>> <bmeng.cn at gmail.com>; Patrick Delaunay <patrick.delaunay at foss.st.com>;
>> Pragnesh Patel <pragnesh.patel at sifive.com>; Frédéric Danis
>> <frederic.danis at collabora.com>; Reuben Dowle <reubendowle0 at gmail.com>;
>> Yangbo Lu <yangbo.lu at nxp.com>; Stefan Bosch <stefan_b at posteo.net>; Ashok
>> Reddy Soma <ashokred at xilinx.com>; Nicolas Saenz Julienne
>> <nsaenzjulienne at suse.de>; Pali Rohár <pali at kernel.org>; u-boot at lists.denx.de
>> Subject: [PATCH] mmc: Add support for enumerating MMC card in a given
>> mode using mmc command
>>
>> 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.
>>
>> 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
>> +
> Can you please use if (IS_ENABLED(CONFIG_MMC_SPEED_MODE_SET)
>
>> 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
>
> same here
>
>> 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)
>
> here as well
>
I can't use if (IS_ENABLED(CONFIG_MMC_SPEED_MODE_SET) because of [1],
as it would lead to build errors.
If it is ok, to remove #ifdef around [1] and add user_speed_mode field
irrespective of config, then I will be able to use it.
Thanks,
Aswath
> Thanks,
> Ashok
>
>> + 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
[1]
>> };
>>
>> #if CONFIG_IS_ENABLED(DM_MMC)
>> --
>> 2.17.1
>
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