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?
Best Regards,
Jaehoo Chung
>
> Signed-off-by: Aswath Govindraju <a-govindr...@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)
>
